Merge tag 'usb-4.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

Pull USB/PHY updates from Greg KH:
 "Here is the big USB and PHY driver updates for 4.11-rc1.

  Nothing major, just the normal amount of churn in the usb gadget and
  dwc and xhci controllers, new device ids, new phy drivers, a new
  usb-serial driver, and a few other minor changes in different USB
  drivers.

  All have been in linux-next for a long time with no reported issues"

* tag 'usb-4.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (265 commits)
  usb: cdc-wdm: remove logically dead code
  USB: serial: keyspan: drop header file
  USB: serial: io_edgeport: drop io-tables header file
  usb: musb: add code comment for clarification
  usb: misc: add USB251xB/xBi Hi-Speed Hub Controller Driver
  usb: misc: usbtest: remove redundant check on retval < 0
  USB: serial: upd78f0730: sort device ids
  USB: serial: upd78f0730: add ID for EVAL-ADXL362Z
  ohci-hub: fix typo in dbg_port macro
  usb: musb: dsps: Manage CPPI 4.1 DMA interrupt in DSPS
  usb: musb: tusb6010: Clean up tusb_omap_dma structure
  usb: musb: cppi_dma: Clean up cppi41_dma_controller structure
  usb: musb: cppi_dma: Clean up cppi structure
  usb: musb: cppi41: Detect aborted transfers in cppi41_dma_callback()
  usb: musb: dma: Add a DMA completion platform callback
  drivers: usb: usbip: Add missing break statement to switch
  usb: mtu3: remove redundant dev_err call in get_ssusb_rscs()
  USB: serial: mos7840: fix another NULL-deref at open
  USB: serial: console: clean up sanity checks
  USB: serial: console: fix uninitialised spinlock
  ...

170 files changed, 7224 insertions, 4433 deletions

diff --git a/drivers/dma/cppi41.c b/drivers/dma/cppi41.c
index 200828c60db9..d74cee077842 100644
--- a/drivers/dma/cppi41.c
+++ b/drivers/dma/cppi41.c
@@ -79,14 +79,6 @@
 #define QMGR_QUEUE_C(n)	(0x2008 + (n) * 0x10)
 #define QMGR_QUEUE_D(n)	(0x200c + (n) * 0x10)
 
-/* Glue layer specific */
-/* USBSS  / USB AM335x */
-#define USBSS_IRQ_STATUS	0x28
-#define USBSS_IRQ_ENABLER	0x2c
-#define USBSS_IRQ_CLEARR	0x30
-
-#define USBSS_IRQ_PD_COMP	(1 <<  2)
-
 /* Packet Descriptor */
 #define PD2_ZERO_LENGTH		(1 << 19)
 
@@ -294,14 +286,8 @@ static irqreturn_t cppi41_irq(int irq, void *data)
 {
 	struct cppi41_dd *cdd = data;
 	struct cppi41_channel *c;
-	u32 status;
 	int i;
 
-	status = cppi_readl(cdd->usbss_mem + USBSS_IRQ_STATUS);
-	if (!(status & USBSS_IRQ_PD_COMP))
-		return IRQ_NONE;
-	cppi_writel(status, cdd->usbss_mem + USBSS_IRQ_STATUS);
-
 	for (i = QMGR_PENDING_SLOT_Q(FIST_COMPLETION_QUEUE); i < QMGR_NUM_PEND;
 			i++) {
 		u32 val;
@@ -618,6 +604,7 @@ static void cppi41_compute_td_desc(struct cppi41_desc *d)
 
 static int cppi41_tear_down_chan(struct cppi41_channel *c)
 {
+	struct dmaengine_result abort_result;
 	struct cppi41_dd *cdd = c->cdd;
 	struct cppi41_desc *td;
 	u32 reg;
@@ -701,6 +688,12 @@ static int cppi41_tear_down_chan(struct cppi41_channel *c)
 	c->td_seen = 0;
 	c->td_desc_seen = 0;
 	cppi_writel(0, c->gcr_reg);
+
+	/* Invoke the callback to do the necessary clean-up */
+	abort_result.result = DMA_TRANS_ABORTED;
+	dma_cookie_complete(&c->txd);
+	dmaengine_desc_get_callback_invoke(&c->txd, &abort_result);
+
 	return 0;
 }
 
@@ -1066,8 +1059,6 @@ static int cppi41_dma_probe(struct platform_device *pdev)
 		goto err_irq;
 	}
 
-	cppi_writel(USBSS_IRQ_PD_COMP, cdd->usbss_mem + USBSS_IRQ_ENABLER);
-
 	ret = devm_request_irq(&pdev->dev, irq, glue_info->isr, IRQF_SHARED,
 			dev_name(dev), cdd);
 	if (ret)
@@ -1091,7 +1082,6 @@ err_of:
 	dma_async_device_unregister(&cdd->ddev);
 err_dma_reg:
 err_irq:
-	cppi_writel(0, cdd->usbss_mem + USBSS_IRQ_CLEARR);
 	cleanup_chans(cdd);
 err_chans:
 	deinit_cppi41(dev, cdd);
@@ -1119,7 +1109,6 @@ static int cppi41_dma_remove(struct platform_device *pdev)
 	of_dma_controller_free(pdev->dev.of_node);
 	dma_async_device_unregister(&cdd->ddev);
 
-	cppi_writel(0, cdd->usbss_mem + USBSS_IRQ_CLEARR);
 	devm_free_irq(&pdev->dev, cdd->irq, cdd);
 	cleanup_chans(cdd);
 	deinit_cppi41(&pdev->dev, cdd);
@@ -1138,7 +1127,6 @@ static int __maybe_unused cppi41_suspend(struct device *dev)
 	struct cppi41_dd *cdd = dev_get_drvdata(dev);
 
 	cdd->dma_tdfdq = cppi_readl(cdd->ctrl_mem + DMA_TDFDQ);
-	cppi_writel(0, cdd->usbss_mem + USBSS_IRQ_CLEARR);
 	disable_sched(cdd);
 
 	return 0;
@@ -1164,8 +1152,6 @@ static int __maybe_unused cppi41_resume(struct device *dev)
 	cppi_writel(QMGR_SCRATCH_SIZE, cdd->qmgr_mem + QMGR_LRAM_SIZE);
 	cppi_writel(0, cdd->qmgr_mem + QMGR_LRAM1_BASE);
 
-	cppi_writel(USBSS_IRQ_PD_COMP, cdd->usbss_mem + USBSS_IRQ_ENABLER);
-
 	return 0;
 }
 
diff --git a/drivers/of/device.c b/drivers/of/device.c
index fd5cfad7c403..b1e6bebda3f3 100644
--- a/drivers/of/device.c
+++ b/drivers/of/device.c
@@ -225,6 +225,30 @@ ssize_t of_device_get_modalias(struct device *dev, char *str, ssize_t len)
 
 	return tsize;
 }
+EXPORT_SYMBOL_GPL(of_device_get_modalias);
+
+int of_device_request_module(struct device *dev)
+{
+	char *str;
+	ssize_t size;
+	int ret;
+
+	size = of_device_get_modalias(dev, NULL, 0);
+	if (size < 0)
+		return size;
+
+	str = kmalloc(size + 1, GFP_KERNEL);
+	if (!str)
+		return -ENOMEM;
+
+	of_device_get_modalias(dev, str, size);
+	str[size] = '\0';
+	ret = request_module(str);
+	kfree(str);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(of_device_request_module);
 
 /**
  * of_device_uevent - Display OF related uevent information
@@ -287,3 +311,4 @@ int of_device_uevent_modalias(struct device *dev, struct kobj_uevent_env *env)
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(of_device_uevent_modalias);
diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
index e8eb7f225a88..bb5cf6f49b06 100644
--- a/drivers/phy/Kconfig
+++ b/drivers/phy/Kconfig
@@ -363,6 +363,7 @@ config PHY_ROCKCHIP_INNO_USB2
 	tristate "Rockchip INNO USB2PHY Driver"
 	depends on (ARCH_ROCKCHIP || COMPILE_TEST) && OF
 	depends on COMMON_CLK
+	depends on EXTCON
 	depends on USB_SUPPORT
 	select GENERIC_PHY
 	select USB_COMMON
@@ -437,6 +438,21 @@ config PHY_QCOM_UFS
 	help
 	  Support for UFS PHY on QCOM chipsets.
 
+config PHY_QCOM_USB_HS
+	tristate "Qualcomm USB HS PHY module"
+	depends on USB_ULPI_BUS
+	select GENERIC_PHY
+	help
+	  Support for the USB high-speed ULPI compliant phy on Qualcomm
+	  chipsets.
+
+config PHY_QCOM_USB_HSIC
+	tristate "Qualcomm USB HSIC ULPI PHY module"
+	depends on USB_ULPI_BUS
+	select GENERIC_PHY
+	help
+	  Support for the USB HSIC ULPI compliant PHY on QCOM chipsets.
+
 config PHY_TUSB1210
 	tristate "TI TUSB1210 ULPI PHY module"
 	depends on USB_ULPI_BUS
@@ -486,4 +502,12 @@ config PHY_MESON8B_USB2
 	  and GXBB SoCs.
 	  If unsure, say N.
 
+config PHY_NSP_USB3
+	tristate "Broadcom NorthStar plus USB3 PHY driver"
+	depends on OF && (ARCH_BCM_NSP || COMPILE_TEST)
+	select GENERIC_PHY
+	default ARCH_BCM_NSP
+	help
+	  Enable this to support the Broadcom Northstar plus USB3 PHY.
+	  If unsure, say N.
 endmenu
diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile
index 65eb2f436a41..9f008004f75d 100644
--- a/drivers/phy/Makefile
+++ b/drivers/phy/Makefile
@@ -52,6 +52,8 @@ obj-$(CONFIG_PHY_STIH407_USB)		+= phy-stih407-usb.o
 obj-$(CONFIG_PHY_QCOM_UFS) 	+= phy-qcom-ufs.o
 obj-$(CONFIG_PHY_QCOM_UFS) 	+= phy-qcom-ufs-qmp-20nm.o
 obj-$(CONFIG_PHY_QCOM_UFS) 	+= phy-qcom-ufs-qmp-14nm.o
+obj-$(CONFIG_PHY_QCOM_USB_HS) 		+= phy-qcom-usb-hs.o
+obj-$(CONFIG_PHY_QCOM_USB_HSIC) 	+= phy-qcom-usb-hsic.o
 obj-$(CONFIG_PHY_TUSB1210)		+= phy-tusb1210.o
 obj-$(CONFIG_PHY_BRCM_SATA)		+= phy-brcm-sata.o
 obj-$(CONFIG_PHY_PISTACHIO_USB)		+= phy-pistachio-usb.o
@@ -59,3 +61,4 @@ obj-$(CONFIG_PHY_CYGNUS_PCIE)		+= phy-bcm-cygnus-pcie.o
 obj-$(CONFIG_ARCH_TEGRA) += tegra/
 obj-$(CONFIG_PHY_NS2_PCIE)		+= phy-bcm-ns2-pcie.o
 obj-$(CONFIG_PHY_MESON8B_USB2)		+= phy-meson8b-usb2.o
+obj-$(CONFIG_PHY_NSP_USB3)		+= phy-bcm-nsp-usb3.o
diff --git a/drivers/phy/phy-bcm-cygnus-pcie.c b/drivers/phy/phy-bcm-cygnus-pcie.c
index 082c03f6438f..0f4ac5d63cff 100644
--- a/drivers/phy/phy-bcm-cygnus-pcie.c
+++ b/drivers/phy/phy-bcm-cygnus-pcie.c
@@ -114,7 +114,7 @@ static int cygnus_pcie_phy_power_off(struct phy *p)
 	return cygnus_pcie_power_config(phy, false);
 }
 
-static struct phy_ops cygnus_pcie_phy_ops = {
+static const struct phy_ops cygnus_pcie_phy_ops = {
 	.power_on = cygnus_pcie_phy_power_on,
 	.power_off = cygnus_pcie_phy_power_off,
 	.owner = THIS_MODULE,
diff --git a/drivers/phy/phy-bcm-nsp-usb3.c b/drivers/phy/phy-bcm-nsp-usb3.c
new file mode 100644
index 000000000000..49024eaa5545
--- /dev/null
+++ b/drivers/phy/phy-bcm-nsp-usb3.c
@@ -0,0 +1,177 @@
+/*
+ * Copyright (C) 2016 Broadcom
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/mfd/syscon.h>
+#include <linux/mdio.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/phy/phy.h>
+#include <linux/regmap.h>
+
+#define NSP_USB3_RST_CTRL_OFFSET	0x3f8
+
+/* mdio reg access */
+#define NSP_USB3_PHY_BASE_ADDR_REG	0x1f
+
+#define NSP_USB3_PHY_PLL30_BLOCK	0x8000
+#define NSP_USB3_PLL_CONTROL		0x01
+#define NSP_USB3_PLLA_CONTROL0		0x0a
+#define NSP_USB3_PLLA_CONTROL1		0x0b
+
+#define NSP_USB3_PHY_TX_PMD_BLOCK	0x8040
+#define NSP_USB3_TX_PMD_CONTROL1	0x01
+
+#define NSP_USB3_PHY_PIPE_BLOCK		0x8060
+#define NSP_USB3_LFPS_CMP		0x02
+#define NSP_USB3_LFPS_DEGLITCH		0x03
+
+struct nsp_usb3_phy {
+	struct regmap *usb3_ctrl;
+	struct phy *phy;
+	struct mdio_device *mdiodev;
+};
+
+static int nsp_usb3_phy_init(struct phy *phy)
+{
+	struct nsp_usb3_phy *iphy = phy_get_drvdata(phy);
+	struct mii_bus *bus = iphy->mdiodev->bus;
+	int addr = iphy->mdiodev->addr;
+	u32 data;
+	int rc;
+
+	rc = regmap_read(iphy->usb3_ctrl, 0, &data);
+	if (rc)
+		return rc;
+	data |= 1;
+	rc = regmap_write(iphy->usb3_ctrl, 0, data);
+	if (rc)
+		return rc;
+
+	rc = regmap_write(iphy->usb3_ctrl, NSP_USB3_RST_CTRL_OFFSET, 1);
+	if (rc)
+		return rc;
+
+	rc = mdiobus_write(bus, addr, NSP_USB3_PHY_BASE_ADDR_REG,
+			   NSP_USB3_PHY_PLL30_BLOCK);
+	if (rc)
+		return rc;
+
+	rc = mdiobus_write(bus, addr, NSP_USB3_PLL_CONTROL, 0x1000);
+	if (rc)
+		return rc;
+
+	rc = mdiobus_write(bus, addr, NSP_USB3_PLLA_CONTROL0, 0x6400);
+	if (rc)
+		return rc;
+
+	rc = mdiobus_write(bus, addr, NSP_USB3_PLLA_CONTROL1, 0xc000);
+	if (rc)
+		return rc;
+
+	rc = mdiobus_write(bus, addr, NSP_USB3_PLLA_CONTROL1, 0x8000);
+	if (rc)
+		return rc;
+
+	rc = regmap_write(iphy->usb3_ctrl, NSP_USB3_RST_CTRL_OFFSET, 0);
+	if (rc)
+		return rc;
+
+	rc = mdiobus_write(bus, addr, NSP_USB3_PLL_CONTROL, 0x9000);
+	if (rc)
+		return rc;
+
+	rc = mdiobus_write(bus, addr, NSP_USB3_PHY_BASE_ADDR_REG,
+			   NSP_USB3_PHY_PIPE_BLOCK);
+	if (rc)
+		return rc;
+
+	rc = mdiobus_write(bus, addr, NSP_USB3_LFPS_CMP, 0xf30d);
+	if (rc)
+		return rc;
+
+	rc = mdiobus_write(bus, addr, NSP_USB3_LFPS_DEGLITCH, 0x6302);
+	if (rc)
+		return rc;
+
+	rc = mdiobus_write(bus, addr, NSP_USB3_PHY_BASE_ADDR_REG,
+			   NSP_USB3_PHY_TX_PMD_BLOCK);
+	if (rc)
+		return rc;
+
+	rc = mdiobus_write(bus, addr, NSP_USB3_TX_PMD_CONTROL1, 0x1003);
+
+	return rc;
+}
+
+static struct phy_ops nsp_usb3_phy_ops = {
+	.init	= nsp_usb3_phy_init,
+	.owner	= THIS_MODULE,
+};
+
+static int nsp_usb3_phy_probe(struct mdio_device *mdiodev)
+{
+	struct device *dev = &mdiodev->dev;
+	struct phy_provider *provider;
+	struct nsp_usb3_phy *iphy;
+
+	iphy = devm_kzalloc(dev, sizeof(*iphy), GFP_KERNEL);
+	if (!iphy)
+		return -ENOMEM;
+	iphy->mdiodev = mdiodev;
+
+	iphy->usb3_ctrl = syscon_regmap_lookup_by_phandle(dev->of_node,
+						 "usb3-ctrl-syscon");
+	if (IS_ERR(iphy->usb3_ctrl))
+		return PTR_ERR(iphy->usb3_ctrl);
+
+	iphy->phy = devm_phy_create(dev, dev->of_node, &nsp_usb3_phy_ops);
+	if (IS_ERR(iphy->phy)) {
+		dev_err(dev, "failed to create PHY\n");
+		return PTR_ERR(iphy->phy);
+	}
+
+	phy_set_drvdata(iphy->phy, iphy);
+
+	provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
+	if (IS_ERR(provider)) {
+		dev_err(dev, "could not register PHY provider\n");
+		return PTR_ERR(provider);
+	}
+
+	return 0;
+}
+
+static const struct of_device_id nsp_usb3_phy_of_match[] = {
+	{.compatible = "brcm,nsp-usb3-phy",},
+	{ /* sentinel */ }
+};
+
+static struct mdio_driver nsp_usb3_phy_driver = {
+	.mdiodrv = {
+		.driver = {
+			.name = "nsp-usb3-phy",
+			.of_match_table = nsp_usb3_phy_of_match,
+		},
+	},
+	.probe = nsp_usb3_phy_probe,
+};
+
+mdio_module_driver(nsp_usb3_phy_driver);
+
+MODULE_DESCRIPTION("Broadcom NSP USB3 PHY driver");
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Yendapally Reddy Dhananjaya Reddy <yendapally.reddy@broadcom.com");
diff --git a/drivers/phy/phy-hi6220-usb.c b/drivers/phy/phy-hi6220-usb.c
index b2141cbd4cf6..398c1021deec 100644
--- a/drivers/phy/phy-hi6220-usb.c
+++ b/drivers/phy/phy-hi6220-usb.c
@@ -112,7 +112,7 @@ static int hi6220_phy_exit(struct phy *phy)
 	return hi6220_phy_setup(priv, false);
 }
 
-static struct phy_ops hi6220_phy_ops = {
+static const struct phy_ops hi6220_phy_ops = {
 	.init		= hi6220_phy_start,
 	.exit		= hi6220_phy_exit,
 	.owner		= THIS_MODULE,
diff --git a/drivers/phy/phy-mt65xx-usb3.c b/drivers/phy/phy-mt65xx-usb3.c
index 4d85e730ccab..d9720675b9db 100644
--- a/drivers/phy/phy-mt65xx-usb3.c
+++ b/drivers/phy/phy-mt65xx-usb3.c
@@ -506,7 +506,7 @@ static struct phy *mt65xx_phy_xlate(struct device *dev,
 	return instance->phy;
 }
 
-static struct phy_ops mt65xx_u3phy_ops = {
+static const struct phy_ops mt65xx_u3phy_ops = {
 	.init		= mt65xx_phy_init,
 	.exit		= mt65xx_phy_exit,
 	.power_on	= mt65xx_phy_power_on,
diff --git a/drivers/phy/phy-qcom-ufs-i.h b/drivers/phy/phy-qcom-ufs-i.h
index d505d98cf5f8..13b02b7de30b 100644
--- a/drivers/phy/phy-qcom-ufs-i.h
+++ b/drivers/phy/phy-qcom-ufs-i.h
@@ -77,7 +77,6 @@ struct ufs_qcom_phy_vreg {
 	int min_uV;
 	int max_uV;
 	bool enabled;
-	bool is_always_on;
 };
 
 struct ufs_qcom_phy {
diff --git a/drivers/phy/phy-qcom-ufs-qmp-14nm.c b/drivers/phy/phy-qcom-ufs-qmp-14nm.c
index c71c84734916..12a1b498dc4b 100644
--- a/drivers/phy/phy-qcom-ufs-qmp-14nm.c
+++ b/drivers/phy/phy-qcom-ufs-qmp-14nm.c
@@ -132,27 +132,18 @@ static int ufs_qcom_phy_qmp_14nm_probe(struct platform_device *pdev)
 				&ufs_qcom_phy_qmp_14nm_phy_ops, &phy_14nm_ops);
 
 	if (!generic_phy) {
-		dev_err(dev, "%s: ufs_qcom_phy_generic_probe() failed\n",
-			__func__);
 		err = -EIO;
 		goto out;
 	}
 
 	err = ufs_qcom_phy_init_clks(phy_common);
-	if (err) {
-		dev_err(phy_common->dev,
-			"%s: ufs_qcom_phy_init_clks() failed %d\n",
-			__func__, err);
+	if (err)
 		goto out;
-	}
 
 	err = ufs_qcom_phy_init_vregulators(phy_common);
-	if (err) {
-		dev_err(phy_common->dev,
-			"%s: ufs_qcom_phy_init_vregulators() failed %d\n",
-			__func__, err);
+	if (err)
 		goto out;
-	}
+
 	phy_common->vdda_phy.max_uV = UFS_PHY_VDDA_PHY_UV;
 	phy_common->vdda_phy.min_uV = UFS_PHY_VDDA_PHY_UV;
 
diff --git a/drivers/phy/phy-qcom-ufs-qmp-20nm.c b/drivers/phy/phy-qcom-ufs-qmp-20nm.c
index 1a26a64e06d3..4f68acb58b73 100644
--- a/drivers/phy/phy-qcom-ufs-qmp-20nm.c
+++ b/drivers/phy/phy-qcom-ufs-qmp-20nm.c
@@ -190,25 +190,17 @@ static int ufs_qcom_phy_qmp_20nm_probe(struct platform_device *pdev)
 				&ufs_qcom_phy_qmp_20nm_phy_ops, &phy_20nm_ops);
 
 	if (!generic_phy) {
-		dev_err(dev, "%s: ufs_qcom_phy_generic_probe() failed\n",
-			__func__);
 		err = -EIO;
 		goto out;
 	}
 
 	err = ufs_qcom_phy_init_clks(phy_common);
-	if (err) {
-		dev_err(phy_common->dev, "%s: ufs_qcom_phy_init_clks() failed %d\n",
-			__func__, err);
+	if (err)
 		goto out;
-	}
 
 	err = ufs_qcom_phy_init_vregulators(phy_common);
-	if (err) {
-		dev_err(phy_common->dev, "%s: ufs_qcom_phy_init_vregulators() failed %d\n",
-			__func__, err);
+	if (err)
 		goto out;
-	}
 
 	ufs_qcom_phy_qmp_20nm_advertise_quirks(phy_common);
 
diff --git a/drivers/phy/phy-qcom-ufs.c b/drivers/phy/phy-qcom-ufs.c
index c69568b8543d..43865ef340e2 100644
--- a/drivers/phy/phy-qcom-ufs.c
+++ b/drivers/phy/phy-qcom-ufs.c
@@ -189,12 +189,12 @@ int ufs_qcom_phy_init_clks(struct ufs_qcom_phy *phy_common)
 	if (err)
 		goto out;
 
+skip_txrx_clk:
 	err = ufs_qcom_phy_clk_get(phy_common->dev, "ref_clk_src",
 				   &phy_common->ref_clk_src);
 	if (err)
 		goto out;
 
-skip_txrx_clk:
 	/*
 	 * "ref_clk_parent" is optional hence don't abort init if it's not
 	 * found.
@@ -210,25 +210,19 @@ out:
 }
 EXPORT_SYMBOL_GPL(ufs_qcom_phy_init_clks);
 
-static int __ufs_qcom_phy_init_vreg(struct device *dev,
-		struct ufs_qcom_phy_vreg *vreg, const char *name, bool optional)
+static int ufs_qcom_phy_init_vreg(struct device *dev,
+				  struct ufs_qcom_phy_vreg *vreg,
+				  const char *name)
 {
 	int err = 0;
 
 	char prop_name[MAX_PROP_NAME];
 
-	vreg->name = devm_kstrdup(dev, name, GFP_KERNEL);
-	if (!vreg->name) {
-		err = -ENOMEM;
-		goto out;
-	}
-
+	vreg->name = name;
 	vreg->reg = devm_regulator_get(dev, name);
 	if (IS_ERR(vreg->reg)) {
 		err = PTR_ERR(vreg->reg);
-		vreg->reg = NULL;
-		if (!optional)
-			dev_err(dev, "failed to get %s, %d\n", name, err);
+		dev_err(dev, "failed to get %s, %d\n", name, err);
 		goto out;
 	}
 
@@ -248,9 +242,6 @@ static int __ufs_qcom_phy_init_vreg(struct device *dev,
 			}
 			err = 0;
 		}
-		snprintf(prop_name, MAX_PROP_NAME, "%s-always-on", name);
-		vreg->is_always_on = of_property_read_bool(dev->of_node,
-							   prop_name);
 	}
 
 	if (!strcmp(name, "vdda-pll")) {
@@ -265,17 +256,9 @@ static int __ufs_qcom_phy_init_vreg(struct device *dev,
 	}
 
 out:
-	if (err)
-		kfree(vreg->name);
 	return err;
 }
 
-static int ufs_qcom_phy_init_vreg(struct device *dev,
-			struct ufs_qcom_phy_vreg *vreg, const char *name)
-{
-	return __ufs_qcom_phy_init_vreg(dev, vreg, name, false);
-}
-
 int ufs_qcom_phy_init_vregulators(struct ufs_qcom_phy *phy_common)
 {
 	int err;
@@ -291,9 +274,9 @@ int ufs_qcom_phy_init_vregulators(struct ufs_qcom_phy *phy_common)
 	if (err)
 		goto out;
 
-	/* vddp-ref-clk-* properties are optional */
-	__ufs_qcom_phy_init_vreg(phy_common->dev, &phy_common->vddp_ref_clk,
-				 "vddp-ref-clk", true);
+	err = ufs_qcom_phy_init_vreg(phy_common->dev, &phy_common->vddp_ref_clk,
+				     "vddp-ref-clk");
+
 out:
 	return err;
 }
@@ -416,7 +399,7 @@ static int ufs_qcom_phy_disable_vreg(struct device *dev,
 {
 	int ret = 0;
 
-	if (!vreg || !vreg->enabled || vreg->is_always_on)
+	if (!vreg || !vreg->enabled)
 		goto out;
 
 	ret = regulator_disable(vreg->reg);
diff --git a/drivers/phy/phy-qcom-usb-hs.c b/drivers/phy/phy-qcom-usb-hs.c
new file mode 100644
index 000000000000..94dfbfd739c3
--- /dev/null
+++ b/drivers/phy/phy-qcom-usb-hs.c
@@ -0,0 +1,296 @@
+/**
+ * Copyright (C) 2016 Linaro Ltd
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/module.h>
+#include <linux/ulpi/driver.h>
+#include <linux/ulpi/regs.h>
+#include <linux/clk.h>
+#include <linux/regulator/consumer.h>
+#include <linux/of_device.h>
+#include <linux/reset.h>
+#include <linux/extcon.h>
+#include <linux/notifier.h>
+
+#include "ulpi_phy.h"
+
+#define ULPI_PWR_CLK_MNG_REG		0x88
+# define ULPI_PWR_OTG_COMP_DISABLE	BIT(0)
+
+#define ULPI_MISC_A			0x96
+# define ULPI_MISC_A_VBUSVLDEXTSEL	BIT(1)
+# define ULPI_MISC_A_VBUSVLDEXT		BIT(0)
+
+
+struct ulpi_seq {
+	u8 addr;
+	u8 val;
+};
+
+struct qcom_usb_hs_phy {
+	struct ulpi *ulpi;
+	struct phy *phy;
+	struct clk *ref_clk;
+	struct clk *sleep_clk;
+	struct regulator *v1p8;
+	struct regulator *v3p3;
+	struct reset_control *reset;
+	struct ulpi_seq *init_seq;
+	struct extcon_dev *vbus_edev;
+	struct notifier_block vbus_notify;
+};
+
+static int qcom_usb_hs_phy_set_mode(struct phy *phy, enum phy_mode mode)
+{
+	struct qcom_usb_hs_phy *uphy = phy_get_drvdata(phy);
+	u8 addr;
+	int ret;
+
+	if (!uphy->vbus_edev) {
+		u8 val = 0;
+
+		switch (mode) {
+		case PHY_MODE_USB_OTG:
+		case PHY_MODE_USB_HOST:
+			val |= ULPI_INT_IDGRD;
+		case PHY_MODE_USB_DEVICE:
+			val |= ULPI_INT_SESS_VALID;
+		default:
+			break;
+		}
+
+		ret = ulpi_write(uphy->ulpi, ULPI_USB_INT_EN_RISE, val);
+		if (ret)
+			return ret;
+		ret = ulpi_write(uphy->ulpi, ULPI_USB_INT_EN_FALL, val);
+	} else {
+		switch (mode) {
+		case PHY_MODE_USB_OTG:
+		case PHY_MODE_USB_DEVICE:
+			addr = ULPI_SET(ULPI_MISC_A);
+			break;
+		case PHY_MODE_USB_HOST:
+			addr = ULPI_CLR(ULPI_MISC_A);
+			break;
+		default:
+			return -EINVAL;
+		}
+
+		ret = ulpi_write(uphy->ulpi, ULPI_SET(ULPI_PWR_CLK_MNG_REG),
+				 ULPI_PWR_OTG_COMP_DISABLE);
+		if (ret)
+			return ret;
+		ret = ulpi_write(uphy->ulpi, addr, ULPI_MISC_A_VBUSVLDEXTSEL);
+	}
+
+	return ret;
+}
+
+static int
+qcom_usb_hs_phy_vbus_notifier(struct notifier_block *nb, unsigned long event,
+			      void *ptr)
+{
+	struct qcom_usb_hs_phy *uphy;
+	u8 addr;
+
+	uphy = container_of(nb, struct qcom_usb_hs_phy, vbus_notify);
+
+	if (event)
+		addr = ULPI_SET(ULPI_MISC_A);
+	else
+		addr = ULPI_CLR(ULPI_MISC_A);
+
+	return ulpi_write(uphy->ulpi, addr, ULPI_MISC_A_VBUSVLDEXT);
+}
+
+static int qcom_usb_hs_phy_power_on(struct phy *phy)
+{
+	struct qcom_usb_hs_phy *uphy = phy_get_drvdata(phy);
+	struct ulpi *ulpi = uphy->ulpi;
+	const struct ulpi_seq *seq;
+	int ret, state;
+
+	ret = clk_prepare_enable(uphy->ref_clk);
+	if (ret)
+		return ret;
+
+	ret = clk_prepare_enable(uphy->sleep_clk);
+	if (ret)
+		goto err_sleep;
+
+	ret = regulator_set_load(uphy->v1p8, 50000);
+	if (ret < 0)
+		goto err_1p8;
+
+	ret = regulator_enable(uphy->v1p8);
+	if (ret)
+		goto err_1p8;
+
+	ret = regulator_set_voltage_triplet(uphy->v3p3, 3050000, 3300000,
+					    3300000);
+	if (ret)
+		goto err_3p3;
+
+	ret = regulator_set_load(uphy->v3p3, 50000);
+	if (ret < 0)
+		goto err_3p3;
+
+	ret = regulator_enable(uphy->v3p3);
+	if (ret)
+		goto err_3p3;
+
+	for (seq = uphy->init_seq; seq->addr; seq++) {
+		ret = ulpi_write(ulpi, ULPI_EXT_VENDOR_SPECIFIC + seq->addr,
+				 seq->val);
+		if (ret)
+			goto err_ulpi;
+	}
+
+	if (uphy->reset) {
+		ret = reset_control_reset(uphy->reset);
+		if (ret)
+			goto err_ulpi;
+	}
+
+	if (uphy->vbus_edev) {
+		state = extcon_get_cable_state_(uphy->vbus_edev, EXTCON_USB);
+		/* setup initial state */
+		qcom_usb_hs_phy_vbus_notifier(&uphy->vbus_notify, state,
+					      uphy->vbus_edev);
+		ret = extcon_register_notifier(uphy->vbus_edev, EXTCON_USB,
+				&uphy->vbus_notify);
+		if (ret)
+			goto err_ulpi;
+	}
+
+	return 0;
+err_ulpi:
+	regulator_disable(uphy->v3p3);
+err_3p3:
+	regulator_disable(uphy->v1p8);
+err_1p8:
+	clk_disable_unprepare(uphy->sleep_clk);
+err_sleep:
+	clk_disable_unprepare(uphy->ref_clk);
+	return ret;
+}
+
+static int qcom_usb_hs_phy_power_off(struct phy *phy)
+{
+	int ret;
+	struct qcom_usb_hs_phy *uphy = phy_get_drvdata(phy);
+
+	if (uphy->vbus_edev) {
+		ret = extcon_unregister_notifier(uphy->vbus_edev, EXTCON_USB,
+						 &uphy->vbus_notify);
+		if (ret)
+			return ret;
+	}
+
+	regulator_disable(uphy->v3p3);
+	regulator_disable(uphy->v1p8);
+	clk_disable_unprepare(uphy->sleep_clk);
+	clk_disable_unprepare(uphy->ref_clk);
+
+	return 0;
+}
+
+static const struct phy_ops qcom_usb_hs_phy_ops = {
+	.power_on = qcom_usb_hs_phy_power_on,
+	.power_off = qcom_usb_hs_phy_power_off,
+	.set_mode = qcom_usb_hs_phy_set_mode,
+	.owner = THIS_MODULE,
+};
+
+static int qcom_usb_hs_phy_probe(struct ulpi *ulpi)
+{
+	struct qcom_usb_hs_phy *uphy;
+	struct phy_provider *p;
+	struct clk *clk;
+	struct regulator *reg;
+	struct reset_control *reset;
+	int size;
+	int ret;
+
+	uphy = devm_kzalloc(&ulpi->dev, sizeof(*uphy), GFP_KERNEL);
+	if (!uphy)
+		return -ENOMEM;
+	ulpi_set_drvdata(ulpi, uphy);
+	uphy->ulpi = ulpi;
+
+	size = of_property_count_u8_elems(ulpi->dev.of_node, "qcom,init-seq");
+	if (size < 0)
+		size = 0;
+	uphy->init_seq = devm_kmalloc_array(&ulpi->dev, (size / 2) + 1,
+					   sizeof(*uphy->init_seq), GFP_KERNEL);
+	if (!uphy->init_seq)
+		return -ENOMEM;
+	ret = of_property_read_u8_array(ulpi->dev.of_node, "qcom,init-seq",
+					(u8 *)uphy->init_seq, size);
+	if (ret && size)
+		return ret;
+	/* NUL terminate */
+	uphy->init_seq[size / 2].addr = uphy->init_seq[size / 2].val = 0;
+
+	uphy->ref_clk = clk = devm_clk_get(&ulpi->dev, "ref");
+	if (IS_ERR(clk))
+		return PTR_ERR(clk);
+
+	uphy->sleep_clk = clk = devm_clk_get(&ulpi->dev, "sleep");
+	if (IS_ERR(clk))
+		return PTR_ERR(clk);
+
+	uphy->v1p8 = reg = devm_regulator_get(&ulpi->dev, "v1p8");
+	if (IS_ERR(reg))
+		return PTR_ERR(reg);
+
+	uphy->v3p3 = reg = devm_regulator_get(&ulpi->dev, "v3p3");
+	if (IS_ERR(reg))
+		return PTR_ERR(reg);
+
+	uphy->reset = reset = devm_reset_control_get(&ulpi->dev, "por");
+	if (IS_ERR(reset)) {
+		if (PTR_ERR(reset) == -EPROBE_DEFER)
+			return PTR_ERR(reset);
+		uphy->reset = NULL;
+	}
+
+	uphy->phy = devm_phy_create(&ulpi->dev, ulpi->dev.of_node,
+				    &qcom_usb_hs_phy_ops);
+	if (IS_ERR(uphy->phy))
+		return PTR_ERR(uphy->phy);
+
+	uphy->vbus_edev = extcon_get_edev_by_phandle(&ulpi->dev, 0);
+	if (IS_ERR(uphy->vbus_edev)) {
+		if (PTR_ERR(uphy->vbus_edev) != -ENODEV)
+			return PTR_ERR(uphy->vbus_edev);
+		uphy->vbus_edev = NULL;
+	}
+
+	uphy->vbus_notify.notifier_call = qcom_usb_hs_phy_vbus_notifier;
+	phy_set_drvdata(uphy->phy, uphy);
+
+	p = devm_of_phy_provider_register(&ulpi->dev, of_phy_simple_xlate);
+	return PTR_ERR_OR_ZERO(p);
+}
+
+static const struct of_device_id qcom_usb_hs_phy_match[] = {
+	{ .compatible = "qcom,usb-hs-phy", },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, qcom_usb_hs_phy_match);
+
+static struct ulpi_driver qcom_usb_hs_phy_driver = {
+	.probe = qcom_usb_hs_phy_probe,
+	.driver = {
+		.name = "qcom_usb_hs_phy",
+		.of_match_table = qcom_usb_hs_phy_match,
+	},
+};
+module_ulpi_driver(qcom_usb_hs_phy_driver);
+
+MODULE_DESCRIPTION("Qualcomm USB HS phy");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/phy/phy-qcom-usb-hsic.c b/drivers/phy/phy-qcom-usb-hsic.c
new file mode 100644
index 000000000000..47690f9945b9
--- /dev/null
+++ b/drivers/phy/phy-qcom-usb-hsic.c
@@ -0,0 +1,160 @@
+/**
+ * Copyright (C) 2016 Linaro Ltd
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/module.h>
+#include <linux/ulpi/driver.h>
+#include <linux/ulpi/regs.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/pinctrl/pinctrl-state.h>
+#include <linux/delay.h>
+#include <linux/clk.h>
+
+#include "ulpi_phy.h"
+
+#define ULPI_HSIC_CFG		0x30
+#define ULPI_HSIC_IO_CAL	0x33
+
+struct qcom_usb_hsic_phy {
+	struct ulpi *ulpi;
+	struct phy *phy;
+	struct pinctrl *pctl;
+	struct clk *phy_clk;
+	struct clk *cal_clk;
+	struct clk *cal_sleep_clk;
+};
+
+static int qcom_usb_hsic_phy_power_on(struct phy *phy)
+{
+	struct qcom_usb_hsic_phy *uphy = phy_get_drvdata(phy);
+	struct ulpi *ulpi = uphy->ulpi;
+	struct pinctrl_state *pins_default;
+	int ret;
+
+	ret = clk_prepare_enable(uphy->phy_clk);
+	if (ret)
+		return ret;
+
+	ret = clk_prepare_enable(uphy->cal_clk);
+	if (ret)
+		goto err_cal;
+
+	ret = clk_prepare_enable(uphy->cal_sleep_clk);
+	if (ret)
+		goto err_sleep;
+
+	/* Set periodic calibration interval to ~2.048sec in HSIC_IO_CAL_REG */
+	ret = ulpi_write(ulpi, ULPI_HSIC_IO_CAL, 0xff);
+	if (ret)
+		goto err_ulpi;
+
+	/* Enable periodic IO calibration in HSIC_CFG register */
+	ret = ulpi_write(ulpi, ULPI_HSIC_CFG, 0xa8);
+	if (ret)
+		goto err_ulpi;
+
+	/* Configure pins for HSIC functionality */
+	pins_default = pinctrl_lookup_state(uphy->pctl, PINCTRL_STATE_DEFAULT);
+	if (IS_ERR(pins_default))
+		return PTR_ERR(pins_default);
+
+	ret = pinctrl_select_state(uphy->pctl, pins_default);
+	if (ret)
+		goto err_ulpi;
+
+	 /* Enable HSIC mode in HSIC_CFG register */
+	ret = ulpi_write(ulpi, ULPI_SET(ULPI_HSIC_CFG), 0x01);
+	if (ret)
+		goto err_ulpi;
+
+	/* Disable auto-resume */
+	ret = ulpi_write(ulpi, ULPI_CLR(ULPI_IFC_CTRL),
+			 ULPI_IFC_CTRL_AUTORESUME);
+	if (ret)
+		goto err_ulpi;
+
+	return ret;
+err_ulpi:
+	clk_disable_unprepare(uphy->cal_sleep_clk);
+err_sleep:
+	clk_disable_unprepare(uphy->cal_clk);
+err_cal:
+	clk_disable_unprepare(uphy->phy_clk);
+	return ret;
+}
+
+static int qcom_usb_hsic_phy_power_off(struct phy *phy)
+{
+	struct qcom_usb_hsic_phy *uphy = phy_get_drvdata(phy);
+
+	clk_disable_unprepare(uphy->cal_sleep_clk);
+	clk_disable_unprepare(uphy->cal_clk);
+	clk_disable_unprepare(uphy->phy_clk);
+
+	return 0;
+}
+
+static const struct phy_ops qcom_usb_hsic_phy_ops = {
+	.power_on = qcom_usb_hsic_phy_power_on,
+	.power_off = qcom_usb_hsic_phy_power_off,
+	.owner = THIS_MODULE,
+};
+
+static int qcom_usb_hsic_phy_probe(struct ulpi *ulpi)
+{
+	struct qcom_usb_hsic_phy *uphy;
+	struct phy_provider *p;
+	struct clk *clk;
+
+	uphy = devm_kzalloc(&ulpi->dev, sizeof(*uphy), GFP_KERNEL);
+	if (!uphy)
+		return -ENOMEM;
+	ulpi_set_drvdata(ulpi, uphy);
+
+	uphy->ulpi = ulpi;
+	uphy->pctl = devm_pinctrl_get(&ulpi->dev);
+	if (IS_ERR(uphy->pctl))
+		return PTR_ERR(uphy->pctl);
+
+	uphy->phy_clk = clk = devm_clk_get(&ulpi->dev, "phy");
+	if (IS_ERR(clk))
+		return PTR_ERR(clk);
+
+	uphy->cal_clk = clk = devm_clk_get(&ulpi->dev, "cal");
+	if (IS_ERR(clk))
+		return PTR_ERR(clk);
+
+	uphy->cal_sleep_clk = clk = devm_clk_get(&ulpi->dev, "cal_sleep");
+	if (IS_ERR(clk))
+		return PTR_ERR(clk);
+
+	uphy->phy = devm_phy_create(&ulpi->dev, ulpi->dev.of_node,
+				    &qcom_usb_hsic_phy_ops);
+	if (IS_ERR(uphy->phy))
+		return PTR_ERR(uphy->phy);
+	phy_set_drvdata(uphy->phy, uphy);
+
+	p = devm_of_phy_provider_register(&ulpi->dev, of_phy_simple_xlate);
+	return PTR_ERR_OR_ZERO(p);
+}
+
+static const struct of_device_id qcom_usb_hsic_phy_match[] = {
+	{ .compatible = "qcom,usb-hsic-phy", },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, qcom_usb_hsic_phy_match);
+
+static struct ulpi_driver qcom_usb_hsic_phy_driver = {
+	.probe = qcom_usb_hsic_phy_probe,
+	.driver = {
+		.name = "qcom_usb_hsic_phy",
+		.of_match_table = qcom_usb_hsic_phy_match,
+	},
+};
+module_ulpi_driver(qcom_usb_hsic_phy_driver);
+
+MODULE_DESCRIPTION("Qualcomm USB HSIC phy");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/phy/phy-rcar-gen3-usb2.c b/drivers/phy/phy-rcar-gen3-usb2.c
index c63da1b955c1..afb4d048d3e9 100644
--- a/drivers/phy/phy-rcar-gen3-usb2.c
+++ b/drivers/phy/phy-rcar-gen3-usb2.c
@@ -94,11 +94,11 @@ static void rcar_gen3_phy_usb2_work(struct work_struct *work)
 						 work);
 
 	if (ch->extcon_host) {
-		extcon_set_cable_state_(ch->extcon, EXTCON_USB_HOST, true);
-		extcon_set_cable_state_(ch->extcon, EXTCON_USB, false);
+		extcon_set_state_sync(ch->extcon, EXTCON_USB_HOST, true);
+		extcon_set_state_sync(ch->extcon, EXTCON_USB, false);
 	} else {
-		extcon_set_cable_state_(ch->extcon, EXTCON_USB_HOST, false);
-		extcon_set_cable_state_(ch->extcon, EXTCON_USB, true);
+		extcon_set_state_sync(ch->extcon, EXTCON_USB_HOST, false);
+		extcon_set_state_sync(ch->extcon, EXTCON_USB, true);
 	}
 }
 
@@ -350,7 +350,7 @@ static int rcar_gen3_phy_usb2_power_off(struct phy *p)
 	return ret;
 }
 
-static struct phy_ops rcar_gen3_phy_usb2_ops = {
+static const struct phy_ops rcar_gen3_phy_usb2_ops = {
 	.init		= rcar_gen3_phy_usb2_init,
 	.exit		= rcar_gen3_phy_usb2_exit,
 	.power_on	= rcar_gen3_phy_usb2_power_on,
diff --git a/drivers/phy/phy-rockchip-inno-usb2.c b/drivers/phy/phy-rockchip-inno-usb2.c
index 2f99ec95079c..4ea95c28a66f 100644
--- a/drivers/phy/phy-rockchip-inno-usb2.c
+++ b/drivers/phy/phy-rockchip-inno-usb2.c
@@ -595,9 +595,14 @@ static void rockchip_usb2phy_otg_sm_work(struct work_struct *work)
 		if (rport->vbus_attached != vbus_attach) {
 			rport->vbus_attached = vbus_attach;
 
-			if (notify_charger && rphy->edev)
+			if (notify_charger && rphy->edev) {
 				extcon_set_cable_state_(rphy->edev,
 							cable, vbus_attach);
+				if (cable == EXTCON_CHG_USB_SDP)
+					extcon_set_state_sync(rphy->edev,
+							      EXTCON_USB,
+							      vbus_attach);
+			}
 		}
 		break;
 	case OTG_STATE_B_PERIPHERAL:
diff --git a/drivers/phy/phy-sun4i-usb.c b/drivers/phy/phy-sun4i-usb.c
index bf28a0fdd569..a21b5f24a340 100644
--- a/drivers/phy/phy-sun4i-usb.c
+++ b/drivers/phy/phy-sun4i-usb.c
@@ -99,6 +99,7 @@ enum sun4i_usb_phy_type {
 	sun6i_a31_phy,
 	sun8i_a33_phy,
 	sun8i_h3_phy,
+	sun8i_v3s_phy,
 	sun50i_a64_phy,
 };
 
@@ -188,7 +189,8 @@ static void sun4i_usb_phy_write(struct sun4i_usb_phy *phy, u32 addr, u32 data,
 	spin_lock_irqsave(&phy_data->reg_lock, flags);
 
 	if (phy_data->cfg->type == sun8i_a33_phy ||
-	    phy_data->cfg->type == sun50i_a64_phy) {
+	    phy_data->cfg->type == sun50i_a64_phy ||
+	    phy_data->cfg->type == sun8i_v3s_phy) {
 		/* A33 or A64 needs us to set phyctl to 0 explicitly */
 		writel(0, phyctl);
 	}
@@ -534,7 +536,7 @@ static void sun4i_usb_phy0_id_vbus_det_scan(struct work_struct *work)
 	mutex_unlock(&phy0->mutex);
 
 	if (id_notify) {
-		extcon_set_cable_state_(data->extcon, EXTCON_USB_HOST,
+		extcon_set_state_sync(data->extcon, EXTCON_USB_HOST,
 					!id_det);
 		/* When leaving host mode force end the session here */
 		if (force_session_end && id_det == 1) {
@@ -547,7 +549,7 @@ static void sun4i_usb_phy0_id_vbus_det_scan(struct work_struct *work)
 	}
 
 	if (vbus_notify)
-		extcon_set_cable_state_(data->extcon, EXTCON_USB, vbus_det);
+		extcon_set_state_sync(data->extcon, EXTCON_USB, vbus_det);
 
 	if (sun4i_usb_phy0_poll(data))
 		queue_delayed_work(system_wq, &data->detect, POLL_TIME);
@@ -825,6 +827,15 @@ static const struct sun4i_usb_phy_cfg sun8i_h3_cfg = {
 	.enable_pmu_unk1 = true,
 };
 
+static const struct sun4i_usb_phy_cfg sun8i_v3s_cfg = {
+	.num_phys = 1,
+	.type = sun8i_v3s_phy,
+	.disc_thresh = 3,
+	.phyctl_offset = REG_PHYCTL_A33,
+	.dedicated_clocks = true,
+	.enable_pmu_unk1 = true,
+};
+
 static const struct sun4i_usb_phy_cfg sun50i_a64_cfg = {
 	.num_phys = 2,
 	.type = sun50i_a64_phy,
@@ -842,6 +853,7 @@ static const struct of_device_id sun4i_usb_phy_of_match[] = {
 	{ .compatible = "allwinner,sun8i-a23-usb-phy", .data = &sun8i_a23_cfg },
 	{ .compatible = "allwinner,sun8i-a33-usb-phy", .data = &sun8i_a33_cfg },
 	{ .compatible = "allwinner,sun8i-h3-usb-phy", .data = &sun8i_h3_cfg },
+	{ .compatible = "allwinner,sun8i-v3s-usb-phy", .data = &sun8i_v3s_cfg },
 	{ .compatible = "allwinner,sun50i-a64-usb-phy",
 	  .data = &sun50i_a64_cfg},
 	{ },
diff --git a/drivers/usb/chipidea/Kconfig b/drivers/usb/chipidea/Kconfig
index 5e5b9eb7ebf6..fc96f5cdcb5c 100644
--- a/drivers/usb/chipidea/Kconfig
+++ b/drivers/usb/chipidea/Kconfig
@@ -2,6 +2,7 @@ config USB_CHIPIDEA
 	tristate "ChipIdea Highspeed Dual Role Controller"
 	depends on ((USB_EHCI_HCD && USB_GADGET) || (USB_EHCI_HCD && !USB_GADGET) || (!USB_EHCI_HCD && USB_GADGET)) && HAS_DMA
 	select EXTCON
+	select RESET_CONTROLLER
 	help
 	  Say Y here if your system has a dual role high speed USB
 	  controller based on ChipIdea silicon IP. It supports:
@@ -38,4 +39,11 @@ config USB_CHIPIDEA_HOST
 	  Say Y here to enable host controller functionality of the
 	  ChipIdea driver.
 
+config USB_CHIPIDEA_ULPI
+	bool "ChipIdea ULPI PHY support"
+	depends on USB_ULPI_BUS=y || USB_ULPI_BUS=USB_CHIPIDEA
+	help
+	  Say Y here if you have a ULPI PHY attached to your ChipIdea
+	  controller.
+
 endif
diff --git a/drivers/usb/chipidea/Makefile b/drivers/usb/chipidea/Makefile
index 518e445476c3..39fca5715ed3 100644
--- a/drivers/usb/chipidea/Makefile
+++ b/drivers/usb/chipidea/Makefile
@@ -4,6 +4,7 @@ ci_hdrc-y				:= core.o otg.o debug.o
 ci_hdrc-$(CONFIG_USB_CHIPIDEA_UDC)	+= udc.o
 ci_hdrc-$(CONFIG_USB_CHIPIDEA_HOST)	+= host.o
 ci_hdrc-$(CONFIG_USB_OTG_FSM)		+= otg_fsm.o
+ci_hdrc-$(CONFIG_USB_CHIPIDEA_ULPI)	+= ulpi.o
 
 # Glue/Bridge layers go here
 
diff --git a/drivers/usb/chipidea/ci.h b/drivers/usb/chipidea/ci.h
index cd414559040f..59e22389c10b 100644
--- a/drivers/usb/chipidea/ci.h
+++ b/drivers/usb/chipidea/ci.h
@@ -18,6 +18,8 @@
 #include <linux/usb.h>
 #include <linux/usb/gadget.h>
 #include <linux/usb/otg-fsm.h>
+#include <linux/usb/otg.h>
+#include <linux/ulpi/interface.h>
 
 /******************************************************************************
  * DEFINE
@@ -52,6 +54,7 @@ enum ci_hw_regs {
 	OP_ENDPTLISTADDR,
 	OP_TTCTRL,
 	OP_BURSTSIZE,
+	OP_ULPI_VIEWPORT,
 	OP_PORTSC,
 	OP_DEVLC,
 	OP_OTGSC,
@@ -187,6 +190,8 @@ struct hw_bank {
  * @test_mode: the selected test mode
  * @platdata: platform specific information supplied by parent device
  * @vbus_active: is VBUS active
+ * @ulpi: pointer to ULPI device, if any
+ * @ulpi_ops: ULPI read/write ops for this device
  * @phy: pointer to PHY, if any
  * @usb_phy: pointer to USB PHY, if any and if using the USB PHY framework
  * @hcd: pointer to usb_hcd for ehci host driver
@@ -236,6 +241,10 @@ struct ci_hdrc {
 
 	struct ci_hdrc_platform_data	*platdata;
 	int				vbus_active;
+#ifdef CONFIG_USB_CHIPIDEA_ULPI
+	struct ulpi			*ulpi;
+	struct ulpi_ops 		ulpi_ops;
+#endif
 	struct phy			*phy;
 	/* old usb_phy interface */
 	struct usb_phy			*usb_phy;
@@ -418,6 +427,16 @@ static inline bool ci_otg_is_fsm_mode(struct ci_hdrc *ci)
 #endif
 }
 
+#if IS_ENABLED(CONFIG_USB_CHIPIDEA_ULPI)
+int ci_ulpi_init(struct ci_hdrc *ci);
+void ci_ulpi_exit(struct ci_hdrc *ci);
+int ci_ulpi_resume(struct ci_hdrc *ci);
+#else
+static inline int ci_ulpi_init(struct ci_hdrc *ci) { return 0; }
+static inline void ci_ulpi_exit(struct ci_hdrc *ci) { }
+static inline int ci_ulpi_resume(struct ci_hdrc *ci) { return 0; }
+#endif
+
 u32 hw_read_intr_enable(struct ci_hdrc *ci);
 
 u32 hw_read_intr_status(struct ci_hdrc *ci);
@@ -428,8 +447,7 @@ int hw_port_test_set(struct ci_hdrc *ci, u8 mode);
 
 u8 hw_port_test_get(struct ci_hdrc *ci);
 
-int hw_wait_reg(struct ci_hdrc *ci, enum ci_hw_regs reg, u32 mask,
-				u32 value, unsigned int timeout_ms);
+void hw_phymode_configure(struct ci_hdrc *ci);
 
 void ci_platform_configure(struct ci_hdrc *ci);
 
diff --git a/drivers/usb/chipidea/ci_hdrc_msm.c b/drivers/usb/chipidea/ci_hdrc_msm.c
index 3889809fd0c4..0bdfcdcbf7a5 100644
--- a/drivers/usb/chipidea/ci_hdrc_msm.c
+++ b/drivers/usb/chipidea/ci_hdrc_msm.c
@@ -8,90 +8,292 @@
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
-#include <linux/usb/msm_hsusb_hw.h>
-#include <linux/usb/ulpi.h>
-#include <linux/usb/gadget.h>
 #include <linux/usb/chipidea.h>
+#include <linux/clk.h>
+#include <linux/reset.h>
+#include <linux/mfd/syscon.h>
+#include <linux/regmap.h>
+#include <linux/io.h>
+#include <linux/reset-controller.h>
+#include <linux/extcon.h>
+#include <linux/of.h>
 
 #include "ci.h"
 
-#define MSM_USB_BASE	(ci->hw_bank.abs)
+#define HS_PHY_AHB_MODE			0x0098
 
-static void ci_hdrc_msm_notify_event(struct ci_hdrc *ci, unsigned event)
+#define HS_PHY_GENCONFIG		0x009c
+#define HS_PHY_TXFIFO_IDLE_FORCE_DIS	BIT(4)
+
+#define HS_PHY_GENCONFIG_2		0x00a0
+#define HS_PHY_SESS_VLD_CTRL_EN		BIT(7)
+#define HS_PHY_ULPI_TX_PKT_EN_CLR_FIX	BIT(19)
+
+#define HSPHY_SESS_VLD_CTRL		BIT(25)
+
+/* Vendor base starts at 0x200 beyond CI base */
+#define HS_PHY_CTRL			0x0040
+#define HS_PHY_SEC_CTRL			0x0078
+#define HS_PHY_DIG_CLAMP_N		BIT(16)
+#define HS_PHY_POR_ASSERT		BIT(0)
+
+struct ci_hdrc_msm {
+	struct platform_device *ci;
+	struct clk *core_clk;
+	struct clk *iface_clk;
+	struct clk *fs_clk;
+	struct ci_hdrc_platform_data pdata;
+	struct reset_controller_dev rcdev;
+	bool secondary_phy;
+	bool hsic;
+	void __iomem *base;
+};
+
+static int
+ci_hdrc_msm_por_reset(struct reset_controller_dev *r, unsigned long id)
 {
-	struct device *dev = ci->gadget.dev.parent;
+	struct ci_hdrc_msm *ci_msm = container_of(r, struct ci_hdrc_msm, rcdev);
+	void __iomem *addr = ci_msm->base;
+	u32 val;
+
+	if (id)
+		addr += HS_PHY_SEC_CTRL;
+	else
+		addr += HS_PHY_CTRL;
+
+	val = readl_relaxed(addr);
+	val |= HS_PHY_POR_ASSERT;
+	writel(val, addr);
+	/*
+	 * wait for minimum 10 microseconds as suggested by manual.
+	 * Use a slightly larger value since the exact value didn't
+	 * work 100% of the time.
+	 */
+	udelay(12);
+	val &= ~HS_PHY_POR_ASSERT;
+	writel(val, addr);
+
+	return 0;
+}
+
+static const struct reset_control_ops ci_hdrc_msm_reset_ops = {
+	.reset = ci_hdrc_msm_por_reset,
+};
+
+static int ci_hdrc_msm_notify_event(struct ci_hdrc *ci, unsigned event)
+{
+	struct device *dev = ci->dev->parent;
+	struct ci_hdrc_msm *msm_ci = dev_get_drvdata(dev);
+	int ret;
 
 	switch (event) {
 	case CI_HDRC_CONTROLLER_RESET_EVENT:
 		dev_dbg(dev, "CI_HDRC_CONTROLLER_RESET_EVENT received\n");
-		writel(0, USB_AHBBURST);
+
+		hw_phymode_configure(ci);
+		if (msm_ci->secondary_phy) {
+			u32 val = readl_relaxed(msm_ci->base + HS_PHY_SEC_CTRL);
+			val |= HS_PHY_DIG_CLAMP_N;
+			writel_relaxed(val, msm_ci->base + HS_PHY_SEC_CTRL);
+		}
+
+		ret = phy_init(ci->phy);
+		if (ret)
+			return ret;
+
+		ret = phy_power_on(ci->phy);
+		if (ret) {
+			phy_exit(ci->phy);
+			return ret;
+		}
+
 		/* use AHB transactor, allow posted data writes */
-		writel(0x8, USB_AHBMODE);
-		usb_phy_init(ci->usb_phy);
+		hw_write_id_reg(ci, HS_PHY_AHB_MODE, 0xffffffff, 0x8);
+
+		/* workaround for rx buffer collision issue */
+		hw_write_id_reg(ci, HS_PHY_GENCONFIG,
+				HS_PHY_TXFIFO_IDLE_FORCE_DIS, 0);
+
+		if (!msm_ci->hsic)
+			hw_write_id_reg(ci, HS_PHY_GENCONFIG_2,
+					HS_PHY_ULPI_TX_PKT_EN_CLR_FIX, 0);
+
+		if (!IS_ERR(ci->platdata->vbus_extcon.edev)) {
+			hw_write_id_reg(ci, HS_PHY_GENCONFIG_2,
+					HS_PHY_SESS_VLD_CTRL_EN,
+					HS_PHY_SESS_VLD_CTRL_EN);
+			hw_write(ci, OP_USBCMD, HSPHY_SESS_VLD_CTRL,
+				 HSPHY_SESS_VLD_CTRL);
+
+		}
 		break;
 	case CI_HDRC_CONTROLLER_STOPPED_EVENT:
 		dev_dbg(dev, "CI_HDRC_CONTROLLER_STOPPED_EVENT received\n");
-		/*
-		 * Put the phy in non-driving mode. Otherwise host
-		 * may not detect soft-disconnection.
-		 */
-		usb_phy_notify_disconnect(ci->usb_phy, USB_SPEED_UNKNOWN);
+		phy_power_off(ci->phy);
+		phy_exit(ci->phy);
 		break;
 	default:
 		dev_dbg(dev, "unknown ci_hdrc event\n");
 		break;
 	}
+
+	return 0;
 }
 
-static struct ci_hdrc_platform_data ci_hdrc_msm_platdata = {
-	.name			= "ci_hdrc_msm",
-	.capoffset		= DEF_CAPOFFSET,
-	.flags			= CI_HDRC_REGS_SHARED |
-				  CI_HDRC_DISABLE_STREAMING,
+static int ci_hdrc_msm_mux_phy(struct ci_hdrc_msm *ci,
+			       struct platform_device *pdev)
+{
+	struct regmap *regmap;
+	struct device *dev = &pdev->dev;
+	struct of_phandle_args args;
+	u32 val;
+	int ret;
 
-	.notify_event		= ci_hdrc_msm_notify_event,
-};
+	ret = of_parse_phandle_with_fixed_args(dev->of_node, "phy-select", 2, 0,
+					       &args);
+	if (ret)
+		return 0;
+
+	regmap = syscon_node_to_regmap(args.np);
+	of_node_put(args.np);
+	if (IS_ERR(regmap))
+		return PTR_ERR(regmap);
+
+	ret = regmap_write(regmap, args.args[0], args.args[1]);
+	if (ret)
+		return ret;
+
+	ci->secondary_phy = !!args.args[1];
+	if (ci->secondary_phy) {
+		val = readl_relaxed(ci->base + HS_PHY_SEC_CTRL);
+		val |= HS_PHY_DIG_CLAMP_N;
+		writel_relaxed(val, ci->base + HS_PHY_SEC_CTRL);
+	}
+
+	return 0;
+}
 
 static int ci_hdrc_msm_probe(struct platform_device *pdev)
 {
+	struct ci_hdrc_msm *ci;
 	struct platform_device *plat_ci;
-	struct usb_phy *phy;
+	struct clk *clk;
+	struct reset_control *reset;
+	struct resource *res;
+	int ret;
+	struct device_node *ulpi_node, *phy_node;
 
 	dev_dbg(&pdev->dev, "ci_hdrc_msm_probe\n");
 
-	/*
-	 * OTG(PHY) driver takes care of PHY initialization, clock management,
-	 * powering up VBUS, mapping of registers address space and power
-	 * management.
-	 */
-	phy = devm_usb_get_phy_by_phandle(&pdev->dev, "usb-phy", 0);
-	if (IS_ERR(phy))
-		return PTR_ERR(phy);
+	ci = devm_kzalloc(&pdev->dev, sizeof(*ci), GFP_KERNEL);
+	if (!ci)
+		return -ENOMEM;
+	platform_set_drvdata(pdev, ci);
+
+	ci->pdata.name = "ci_hdrc_msm";
+	ci->pdata.capoffset = DEF_CAPOFFSET;
+	ci->pdata.flags	= CI_HDRC_REGS_SHARED | CI_HDRC_DISABLE_STREAMING |
+			  CI_HDRC_OVERRIDE_AHB_BURST |
+			  CI_HDRC_OVERRIDE_PHY_CONTROL;
+	ci->pdata.notify_event = ci_hdrc_msm_notify_event;
+
+	reset = devm_reset_control_get(&pdev->dev, "core");
+	if (IS_ERR(reset))
+		return PTR_ERR(reset);
+
+	ci->core_clk = clk = devm_clk_get(&pdev->dev, "core");
+	if (IS_ERR(clk))
+		return PTR_ERR(clk);
 
-	ci_hdrc_msm_platdata.usb_phy = phy;
+	ci->iface_clk = clk = devm_clk_get(&pdev->dev, "iface");
+	if (IS_ERR(clk))
+		return PTR_ERR(clk);
 
-	plat_ci = ci_hdrc_add_device(&pdev->dev,
-				pdev->resource, pdev->num_resources,
-				&ci_hdrc_msm_platdata);
+	ci->fs_clk = clk = devm_clk_get(&pdev->dev, "fs");
+	if (IS_ERR(clk)) {
+		if (PTR_ERR(clk) == -EPROBE_DEFER)
+			return -EPROBE_DEFER;
+		ci->fs_clk = NULL;
+	}
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+	ci->base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(ci->base))
+		return PTR_ERR(ci->base);
+
+	ci->rcdev.owner = THIS_MODULE;
+	ci->rcdev.ops = &ci_hdrc_msm_reset_ops;
+	ci->rcdev.of_node = pdev->dev.of_node;
+	ci->rcdev.nr_resets = 2;
+	ret = reset_controller_register(&ci->rcdev);
+	if (ret)
+		return ret;
+
+	ret = clk_prepare_enable(ci->fs_clk);
+	if (ret)
+		goto err_fs;
+
+	reset_control_assert(reset);
+	usleep_range(10000, 12000);
+	reset_control_deassert(reset);
+
+	clk_disable_unprepare(ci->fs_clk);
+
+	ret = clk_prepare_enable(ci->core_clk);
+	if (ret)
+		goto err_fs;
+
+	ret = clk_prepare_enable(ci->iface_clk);
+	if (ret)
+		goto err_iface;
+
+	ret = ci_hdrc_msm_mux_phy(ci, pdev);
+	if (ret)
+		goto err_mux;
+
+	ulpi_node = of_find_node_by_name(pdev->dev.of_node, "ulpi");
+	if (ulpi_node) {
+		phy_node = of_get_next_available_child(ulpi_node, NULL);
+		ci->hsic = of_device_is_compatible(phy_node, "qcom,usb-hsic-phy");
+		of_node_put(phy_node);
+	}
+	of_node_put(ulpi_node);
+
+	plat_ci = ci_hdrc_add_device(&pdev->dev, pdev->resource,
+				     pdev->num_resources, &ci->pdata);
 	if (IS_ERR(plat_ci)) {
-		dev_err(&pdev->dev, "ci_hdrc_add_device failed!\n");
-		return PTR_ERR(plat_ci);
+		ret = PTR_ERR(plat_ci);
+		if (ret != -EPROBE_DEFER)
+			dev_err(&pdev->dev, "ci_hdrc_add_device failed!\n");
+		goto err_mux;
 	}
 
-	platform_set_drvdata(pdev, plat_ci);
+	ci->ci = plat_ci;
 
+	pm_runtime_set_active(&pdev->dev);
 	pm_runtime_no_callbacks(&pdev->dev);
 	pm_runtime_enable(&pdev->dev);
 
 	return 0;
+
+err_mux:
+	clk_disable_unprepare(ci->iface_clk);
+err_iface:
+	clk_disable_unprepare(ci->core_clk);
+err_fs:
+	reset_controller_unregister(&ci->rcdev);
+	return ret;
 }
 
 static int ci_hdrc_msm_remove(struct platform_device *pdev)
 {
-	struct platform_device *plat_ci = platform_get_drvdata(pdev);
+	struct ci_hdrc_msm *ci = platform_get_drvdata(pdev);
 
 	pm_runtime_disable(&pdev->dev);
-	ci_hdrc_remove_device(plat_ci);
+	ci_hdrc_remove_device(ci->ci);
+	clk_disable_unprepare(ci->iface_clk);
+	clk_disable_unprepare(ci->core_clk);
+	reset_controller_unregister(&ci->rcdev);
 
 	return 0;
 }
diff --git a/drivers/usb/chipidea/ci_hdrc_usb2.c b/drivers/usb/chipidea/ci_hdrc_usb2.c
index 4456d2cf80ff..d162cc0bb8ce 100644
--- a/drivers/usb/chipidea/ci_hdrc_usb2.c
+++ b/drivers/usb/chipidea/ci_hdrc_usb2.c
@@ -74,10 +74,6 @@ static int ci_hdrc_usb2_probe(struct platform_device *pdev)
 		}
 	}
 
-	ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
-	if (ret)
-		goto clk_err;
-
 	ci_pdata->name = dev_name(dev);
 
 	priv->ci_pdev = ci_hdrc_add_device(dev, pdev->resource,
diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c
index 3dbb4a21ab44..79ad8e91632e 100644
--- a/drivers/usb/chipidea/core.c
+++ b/drivers/usb/chipidea/core.c
@@ -62,7 +62,6 @@
 #include <linux/usb/chipidea.h>
 #include <linux/usb/of.h>
 #include <linux/of.h>
-#include <linux/phy.h>
 #include <linux/regulator/consumer.h>
 #include <linux/usb/ehci_def.h>
 
@@ -86,6 +85,7 @@ static const u8 ci_regs_nolpm[] = {
 	[OP_ENDPTLISTADDR]	= 0x18U,
 	[OP_TTCTRL]		= 0x1CU,
 	[OP_BURSTSIZE]		= 0x20U,
+	[OP_ULPI_VIEWPORT]	= 0x30U,
 	[OP_PORTSC]		= 0x44U,
 	[OP_DEVLC]		= 0x84U,
 	[OP_OTGSC]		= 0x64U,
@@ -110,6 +110,7 @@ static const u8 ci_regs_lpm[] = {
 	[OP_ENDPTLISTADDR]	= 0x18U,
 	[OP_TTCTRL]		= 0x1CU,
 	[OP_BURSTSIZE]		= 0x20U,
+	[OP_ULPI_VIEWPORT]	= 0x30U,
 	[OP_PORTSC]		= 0x44U,
 	[OP_DEVLC]		= 0x84U,
 	[OP_OTGSC]		= 0xC4U,
@@ -285,7 +286,7 @@ static int hw_device_init(struct ci_hdrc *ci, void __iomem *base)
 	return 0;
 }
 
-static void hw_phymode_configure(struct ci_hdrc *ci)
+void hw_phymode_configure(struct ci_hdrc *ci)
 {
 	u32 portsc, lpm, sts = 0;
 
@@ -325,6 +326,7 @@ static void hw_phymode_configure(struct ci_hdrc *ci)
 			hw_write(ci, OP_PORTSC, PORTSC_STS, PORTSC_STS);
 	}
 }
+EXPORT_SYMBOL_GPL(hw_phymode_configure);
 
 /**
  * _ci_usb_phy_init: initialize phy taking in account both phy and usb_phy
@@ -361,6 +363,9 @@ static int _ci_usb_phy_init(struct ci_hdrc *ci)
  */
 static void ci_usb_phy_exit(struct ci_hdrc *ci)
 {
+	if (ci->platdata->flags & CI_HDRC_OVERRIDE_PHY_CONTROL)
+		return;
+
 	if (ci->phy) {
 		phy_power_off(ci->phy);
 		phy_exit(ci->phy);
@@ -379,6 +384,9 @@ static int ci_usb_phy_init(struct ci_hdrc *ci)
 {
 	int ret;
 
+	if (ci->platdata->flags & CI_HDRC_OVERRIDE_PHY_CONTROL)
+		return 0;
+
 	switch (ci->platdata->phy_mode) {
 	case USBPHY_INTERFACE_MODE_UTMI:
 	case USBPHY_INTERFACE_MODE_UTMIW:
@@ -419,13 +427,21 @@ void ci_platform_configure(struct ci_hdrc *ci)
 	is_device_mode = hw_read(ci, OP_USBMODE, USBMODE_CM) == USBMODE_CM_DC;
 	is_host_mode = hw_read(ci, OP_USBMODE, USBMODE_CM) == USBMODE_CM_HC;
 
-	if (is_device_mode &&
-		(ci->platdata->flags & CI_HDRC_DISABLE_DEVICE_STREAMING))
-		hw_write(ci, OP_USBMODE, USBMODE_CI_SDIS, USBMODE_CI_SDIS);
+	if (is_device_mode) {
+		phy_set_mode(ci->phy, PHY_MODE_USB_DEVICE);
+
+		if (ci->platdata->flags & CI_HDRC_DISABLE_DEVICE_STREAMING)
+			hw_write(ci, OP_USBMODE, USBMODE_CI_SDIS,
+				 USBMODE_CI_SDIS);
+	}
+
+	if (is_host_mode) {
+		phy_set_mode(ci->phy, PHY_MODE_USB_HOST);
 
-	if (is_host_mode &&
-		(ci->platdata->flags & CI_HDRC_DISABLE_HOST_STREAMING))
-		hw_write(ci, OP_USBMODE, USBMODE_CI_SDIS, USBMODE_CI_SDIS);
+		if (ci->platdata->flags & CI_HDRC_DISABLE_HOST_STREAMING)
+			hw_write(ci, OP_USBMODE, USBMODE_CI_SDIS,
+				 USBMODE_CI_SDIS);
+	}
 
 	if (ci->platdata->flags & CI_HDRC_FORCE_FULLSPEED) {
 		if (ci->hw_bank.lpm)
@@ -495,9 +511,12 @@ int hw_device_reset(struct ci_hdrc *ci)
 		return ret;
 	}
 
-	if (ci->platdata->notify_event)
-		ci->platdata->notify_event(ci,
+	if (ci->platdata->notify_event) {
+		ret = ci->platdata->notify_event(ci,
 			CI_HDRC_CONTROLLER_RESET_EVENT);
+		if (ret)
+			return ret;
+	}
 
 	/* USBMODE should be configured step by step */
 	hw_write(ci, OP_USBMODE, USBMODE_CM, USBMODE_CM_IDLE);
@@ -516,38 +535,6 @@ int hw_device_reset(struct ci_hdrc *ci)
 	return 0;
 }
 
-/**
- * hw_wait_reg: wait the register value
- *
- * Sometimes, it needs to wait register value before going on.
- * Eg, when switch to device mode, the vbus value should be lower
- * than OTGSC_BSV before connects to host.
- *
- * @ci: the controller
- * @reg: register index
- * @mask: mast bit
- * @value: the bit value to wait
- * @timeout_ms: timeout in millisecond
- *
- * This function returns an error code if timeout
- */
-int hw_wait_reg(struct ci_hdrc *ci, enum ci_hw_regs reg, u32 mask,
-				u32 value, unsigned int timeout_ms)
-{
-	unsigned long elapse = jiffies + msecs_to_jiffies(timeout_ms);
-
-	while (hw_read(ci, reg, mask) != value) {
-		if (time_after(jiffies, elapse)) {
-			dev_err(ci->dev, "timeout waiting for %08x in %d\n",
-					mask, reg);
-			return -ETIMEDOUT;
-		}
-		msleep(20);
-	}
-
-	return 0;
-}
-
 static irqreturn_t ci_irq(int irq, void *data)
 {
 	struct ci_hdrc *ci = data;
@@ -601,35 +588,14 @@ static irqreturn_t ci_irq(int irq, void *data)
 	return ret;
 }
 
-static int ci_vbus_notifier(struct notifier_block *nb, unsigned long event,
-			    void *ptr)
-{
-	struct ci_hdrc_cable *vbus = container_of(nb, struct ci_hdrc_cable, nb);
-	struct ci_hdrc *ci = vbus->ci;
-
-	if (event)
-		vbus->state = true;
-	else
-		vbus->state = false;
-
-	vbus->changed = true;
-
-	ci_irq(ci->irq, ci);
-	return NOTIFY_DONE;
-}
-
-static int ci_id_notifier(struct notifier_block *nb, unsigned long event,
-			  void *ptr)
+static int ci_cable_notifier(struct notifier_block *nb, unsigned long event,
+			     void *ptr)
 {
-	struct ci_hdrc_cable *id = container_of(nb, struct ci_hdrc_cable, nb);
-	struct ci_hdrc *ci = id->ci;
+	struct ci_hdrc_cable *cbl = container_of(nb, struct ci_hdrc_cable, nb);
+	struct ci_hdrc *ci = cbl->ci;
 
-	if (event)
-		id->state = false;
-	else
-		id->state = true;
-
-	id->changed = true;
+	cbl->connected = event;
+	cbl->changed = true;
 
 	ci_irq(ci->irq, ci);
 	return NOTIFY_DONE;
@@ -738,27 +704,27 @@ static int ci_get_platdata(struct device *dev,
 	}
 
 	cable = &platdata->vbus_extcon;
-	cable->nb.notifier_call = ci_vbus_notifier;
+	cable->nb.notifier_call = ci_cable_notifier;
 	cable->edev = ext_vbus;
 
 	if (!IS_ERR(ext_vbus)) {
-		ret = extcon_get_cable_state_(cable->edev, EXTCON_USB);
+		ret = extcon_get_state(cable->edev, EXTCON_USB);
 		if (ret)
-			cable->state = true;
+			cable->connected = true;
 		else
-			cable->state = false;
+			cable->connected = false;
 	}
 
 	cable = &platdata->id_extcon;
-	cable->nb.notifier_call = ci_id_notifier;
+	cable->nb.notifier_call = ci_cable_notifier;
 	cable->edev = ext_id;
 
 	if (!IS_ERR(ext_id)) {
-		ret = extcon_get_cable_state_(cable->edev, EXTCON_USB_HOST);
+		ret = extcon_get_state(cable->edev, EXTCON_USB_HOST);
 		if (ret)
-			cable->state = false;
+			cable->connected = true;
 		else
-			cable->state = true;
+			cable->connected = false;
 	}
 	return 0;
 }
@@ -771,8 +737,8 @@ static int ci_extcon_register(struct ci_hdrc *ci)
 	id = &ci->platdata->id_extcon;
 	id->ci = ci;
 	if (!IS_ERR(id->edev)) {
-		ret = extcon_register_notifier(id->edev, EXTCON_USB_HOST,
-					       &id->nb);
+		ret = devm_extcon_register_notifier(ci->dev, id->edev,
+						EXTCON_USB_HOST, &id->nb);
 		if (ret < 0) {
 			dev_err(ci->dev, "register ID failed\n");
 			return ret;
@@ -782,11 +748,9 @@ static int ci_extcon_register(struct ci_hdrc *ci)
 	vbus = &ci->platdata->vbus_extcon;
 	vbus->ci = ci;
 	if (!IS_ERR(vbus->edev)) {
-		ret = extcon_register_notifier(vbus->edev, EXTCON_USB,
-					       &vbus->nb);
+		ret = devm_extcon_register_notifier(ci->dev, vbus->edev,
+						EXTCON_USB, &vbus->nb);
 		if (ret < 0) {
-			extcon_unregister_notifier(id->edev, EXTCON_USB_HOST,
-						   &id->nb);
 			dev_err(ci->dev, "register VBUS failed\n");
 			return ret;
 		}
@@ -795,20 +759,6 @@ static int ci_extcon_register(struct ci_hdrc *ci)
 	return 0;
 }
 
-static void ci_extcon_unregister(struct ci_hdrc *ci)
-{
-	struct ci_hdrc_cable *cable;
-
-	cable = &ci->platdata->id_extcon;
-	if (!IS_ERR(cable->edev))
-		extcon_unregister_notifier(cable->edev, EXTCON_USB_HOST,
-					   &cable->nb);
-
-	cable = &ci->platdata->vbus_extcon;
-	if (!IS_ERR(cable->edev))
-		extcon_unregister_notifier(cable->edev, EXTCON_USB, &cable->nb);
-}
-
 static DEFINE_IDA(ci_ida);
 
 struct platform_device *ci_hdrc_add_device(struct device *dev,
@@ -921,6 +871,7 @@ static int ci_hdrc_probe(struct platform_device *pdev)
 		CI_HDRC_IMX28_WRITE_FIX);
 	ci->supports_runtime_pm = !!(ci->platdata->flags &
 		CI_HDRC_SUPPORTS_RUNTIME_PM);
+	platform_set_drvdata(pdev, ci);
 
 	ret = hw_device_init(ci, base);
 	if (ret < 0) {
@@ -928,6 +879,10 @@ static int ci_hdrc_probe(struct platform_device *pdev)
 		return -ENODEV;
 	}
 
+	ret = ci_ulpi_init(ci);
+	if (ret)
+		return ret;
+
 	if (ci->platdata->phy) {
 		ci->phy = ci->platdata->phy;
 	} else if (ci->platdata->usb_phy) {
@@ -938,11 +893,15 @@ static int ci_hdrc_probe(struct platform_device *pdev)
 
 		/* if both generic PHY and USB PHY layers aren't enabled */
 		if (PTR_ERR(ci->phy) == -ENOSYS &&
-				PTR_ERR(ci->usb_phy) == -ENXIO)
-			return -ENXIO;
+				PTR_ERR(ci->usb_phy) == -ENXIO) {
+			ret = -ENXIO;
+			goto ulpi_exit;
+		}
 
-		if (IS_ERR(ci->phy) && IS_ERR(ci->usb_phy))
-			return -EPROBE_DEFER;
+		if (IS_ERR(ci->phy) && IS_ERR(ci->usb_phy)) {
+			ret = -EPROBE_DEFER;
+			goto ulpi_exit;
+		}
 
 		if (IS_ERR(ci->phy))
 			ci->phy = NULL;
@@ -1027,7 +986,6 @@ static int ci_hdrc_probe(struct platform_device *pdev)
 		}
 	}
 
-	platform_set_drvdata(pdev, ci);
 	ret = devm_request_irq(dev, ci->irq, ci_irq, IRQF_SHARED,
 			ci->platdata->name, ci);
 	if (ret)
@@ -1054,11 +1012,12 @@ static int ci_hdrc_probe(struct platform_device *pdev)
 	if (!ret)
 		return 0;
 
-	ci_extcon_unregister(ci);
 stop:
 	ci_role_destroy(ci);
 deinit_phy:
 	ci_usb_phy_exit(ci);
+ulpi_exit:
+	ci_ulpi_exit(ci);
 
 	return ret;
 }
@@ -1074,10 +1033,10 @@ static int ci_hdrc_remove(struct platform_device *pdev)
 	}
 
 	dbg_remove_files(ci);
-	ci_extcon_unregister(ci);
 	ci_role_destroy(ci);
 	ci_hdrc_enter_lpm(ci, true);
 	ci_usb_phy_exit(ci);
+	ci_ulpi_exit(ci);
 
 	return 0;
 }
@@ -1125,6 +1084,7 @@ static void ci_controller_suspend(struct ci_hdrc *ci)
 static int ci_controller_resume(struct device *dev)
 {
 	struct ci_hdrc *ci = dev_get_drvdata(dev);
+	int ret;
 
 	dev_dbg(dev, "at %s\n", __func__);
 
@@ -1134,6 +1094,11 @@ static int ci_controller_resume(struct device *dev)
 	}
 
 	ci_hdrc_enter_lpm(ci, false);
+
+	ret = ci_ulpi_resume(ci);
+	if (ret)
+		return ret;
+
 	if (ci->usb_phy) {
 		usb_phy_set_suspend(ci->usb_phy, 0);
 		usb_phy_set_wakeup(ci->usb_phy, false);
diff --git a/drivers/usb/chipidea/host.c b/drivers/usb/chipidea/host.c
index 111b0e0b8698..915f3e91586e 100644
--- a/drivers/usb/chipidea/host.c
+++ b/drivers/usb/chipidea/host.c
@@ -90,6 +90,13 @@ static int ehci_ci_reset(struct usb_hcd *hcd)
 
 	ehci->need_io_watchdog = 0;
 
+	if (ci->platdata->notify_event) {
+		ret = ci->platdata->notify_event(ci,
+				CI_HDRC_CONTROLLER_RESET_EVENT);
+		if (ret)
+			return ret;
+	}
+
 	ci_platform_configure(ci);
 
 	return ret;
@@ -187,6 +194,9 @@ static void host_stop(struct ci_hdrc *ci)
 	struct usb_hcd *hcd = ci->hcd;
 
 	if (hcd) {
+		if (ci->platdata->notify_event)
+			ci->platdata->notify_event(ci,
+				CI_HDRC_CONTROLLER_STOPPED_EVENT);
 		usb_remove_hcd(hcd);
 		ci->role = CI_ROLE_END;
 		synchronize_irq(ci->irq);
diff --git a/drivers/usb/chipidea/otg.c b/drivers/usb/chipidea/otg.c
index 03b6743461d1..10236fe71522 100644
--- a/drivers/usb/chipidea/otg.c
+++ b/drivers/usb/chipidea/otg.c
@@ -44,12 +44,15 @@ u32 hw_read_otgsc(struct ci_hdrc *ci, u32 mask)
 		else
 			val &= ~OTGSC_BSVIS;
 
-		cable->changed = false;
-
-		if (cable->state)
+		if (cable->connected)
 			val |= OTGSC_BSV;
 		else
 			val &= ~OTGSC_BSV;
+
+		if (cable->enabled)
+			val |= OTGSC_BSVIE;
+		else
+			val &= ~OTGSC_BSVIE;
 	}
 
 	cable = &ci->platdata->id_extcon;
@@ -59,15 +62,18 @@ u32 hw_read_otgsc(struct ci_hdrc *ci, u32 mask)
 		else
 			val &= ~OTGSC_IDIS;
 
-		cable->changed = false;
+		if (cable->connected)
+			val &= ~OTGSC_ID; /* host */
+		else
+			val |= OTGSC_ID; /* device */
 
-		if (cable->state)
-			val |= OTGSC_ID;
+		if (cable->enabled)
+			val |= OTGSC_IDIE;
 		else
-			val &= ~OTGSC_ID;
+			val &= ~OTGSC_IDIE;
 	}
 
-	return val;
+	return val & mask;
 }
 
 /**
@@ -77,6 +83,36 @@ u32 hw_read_otgsc(struct ci_hdrc *ci, u32 mask)
  */
 void hw_write_otgsc(struct ci_hdrc *ci, u32 mask, u32 data)
 {
+	struct ci_hdrc_cable *cable;
+
+	cable = &ci->platdata->vbus_extcon;
+	if (!IS_ERR(cable->edev)) {
+		if (data & mask & OTGSC_BSVIS)
+			cable->changed = false;
+
+		/* Don't enable vbus interrupt if using external notifier */
+		if (data & mask & OTGSC_BSVIE) {
+			cable->enabled = true;
+			data &= ~OTGSC_BSVIE;
+		} else if (mask & OTGSC_BSVIE) {
+			cable->enabled = false;
+		}
+	}
+
+	cable = &ci->platdata->id_extcon;
+	if (!IS_ERR(cable->edev)) {
+		if (data & mask & OTGSC_IDIS)
+			cable->changed = false;
+
+		/* Don't enable id interrupt if using external notifier */
+		if (data & mask & OTGSC_IDIE) {
+			cable->enabled = true;
+			data &= ~OTGSC_IDIE;
+		} else if (mask & OTGSC_IDIE) {
+			cable->enabled = false;
+		}
+	}
+
 	hw_write(ci, OP_OTGSC, mask | OTGSC_INT_STATUS_BITS, data);
 }
 
@@ -98,13 +134,37 @@ void ci_handle_vbus_change(struct ci_hdrc *ci)
 	if (!ci->is_otg)
 		return;
 
-	if (hw_read_otgsc(ci, OTGSC_BSV))
+	if (hw_read_otgsc(ci, OTGSC_BSV) && !ci->vbus_active)
 		usb_gadget_vbus_connect(&ci->gadget);
-	else
+	else if (!hw_read_otgsc(ci, OTGSC_BSV) && ci->vbus_active)
 		usb_gadget_vbus_disconnect(&ci->gadget);
 }
 
-#define CI_VBUS_STABLE_TIMEOUT_MS 5000
+/**
+ * When we switch to device mode, the vbus value should be lower
+ * than OTGSC_BSV before connecting to host.
+ *
+ * @ci: the controller
+ *
+ * This function returns an error code if timeout
+ */
+static int hw_wait_vbus_lower_bsv(struct ci_hdrc *ci)
+{
+	unsigned long elapse = jiffies + msecs_to_jiffies(5000);
+	u32 mask = OTGSC_BSV;
+
+	while (hw_read_otgsc(ci, mask)) {
+		if (time_after(jiffies, elapse)) {
+			dev_err(ci->dev, "timeout waiting for %08x in OTGSC\n",
+					mask);
+			return -ETIMEDOUT;
+		}
+		msleep(20);
+	}
+
+	return 0;
+}
+
 static void ci_handle_id_switch(struct ci_hdrc *ci)
 {
 	enum ci_role role = ci_otg_role(ci);
@@ -115,12 +175,21 @@ static void ci_handle_id_switch(struct ci_hdrc *ci)
 
 		ci_role_stop(ci);
 
-		if (role == CI_ROLE_GADGET)
-			/* wait vbus lower than OTGSC_BSV */
-			hw_wait_reg(ci, OP_OTGSC, OTGSC_BSV, 0,
-					CI_VBUS_STABLE_TIMEOUT_MS);
+		if (role == CI_ROLE_GADGET &&
+				IS_ERR(ci->platdata->vbus_extcon.edev))
+			/*
+			 * Wait vbus lower than OTGSC_BSV before connecting
+			 * to host. If connecting status is from an external
+			 * connector instead of register, we don't need to
+			 * care vbus on the board, since it will not affect
+			 * external connector status.
+			 */
+			hw_wait_vbus_lower_bsv(ci);
 
 		ci_role_start(ci, role);
+		/* vbus change may have already occurred */
+		if (role == CI_ROLE_GADGET)
+			ci_handle_vbus_change(ci);
 	}
 }
 /**
diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c
index cf132f057137..f88e9157fad0 100644
--- a/drivers/usb/chipidea/udc.c
+++ b/drivers/usb/chipidea/udc.c
@@ -1725,7 +1725,6 @@ static int ci_udc_start(struct usb_gadget *gadget,
 			 struct usb_gadget_driver *driver)
 {
 	struct ci_hdrc *ci = container_of(gadget, struct ci_hdrc, gadget);
-	unsigned long flags;
 	int retval = -ENOMEM;
 
 	if (driver->disconnect == NULL)
@@ -1752,7 +1751,6 @@ static int ci_udc_start(struct usb_gadget *gadget,
 
 	pm_runtime_get_sync(&ci->gadget.dev);
 	if (ci->vbus_active) {
-		spin_lock_irqsave(&ci->lock, flags);
 		hw_device_reset(ci);
 	} else {
 		usb_udc_vbus_handler(&ci->gadget, false);
@@ -1761,7 +1759,6 @@ static int ci_udc_start(struct usb_gadget *gadget,
 	}
 
 	retval = hw_device_state(ci, ci->ep0out->qh.dma);
-	spin_unlock_irqrestore(&ci->lock, flags);
 	if (retval)
 		pm_runtime_put_sync(&ci->gadget.dev);
 
@@ -1796,10 +1793,10 @@ static int ci_udc_stop(struct usb_gadget *gadget)
 
 	if (ci->vbus_active) {
 		hw_device_state(ci, 0);
+		spin_unlock_irqrestore(&ci->lock, flags);
 		if (ci->platdata->notify_event)
 			ci->platdata->notify_event(ci,
 			CI_HDRC_CONTROLLER_STOPPED_EVENT);
-		spin_unlock_irqrestore(&ci->lock, flags);
 		_gadget_stop_activity(&ci->gadget);
 		spin_lock_irqsave(&ci->lock, flags);
 		pm_runtime_put(&ci->gadget.dev);
diff --git a/drivers/usb/chipidea/ulpi.c b/drivers/usb/chipidea/ulpi.c
new file mode 100644
index 000000000000..1219583dc1b2
--- /dev/null
+++ b/drivers/usb/chipidea/ulpi.c
@@ -0,0 +1,113 @@
+/*
+ * Copyright (c) 2016 Linaro Ltd.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/device.h>
+#include <linux/usb/chipidea.h>
+#include <linux/ulpi/interface.h>
+
+#include "ci.h"
+
+#define ULPI_WAKEUP		BIT(31)
+#define ULPI_RUN		BIT(30)
+#define ULPI_WRITE		BIT(29)
+#define ULPI_SYNC_STATE		BIT(27)
+#define ULPI_ADDR(n)		((n) << 16)
+#define ULPI_DATA(n)		(n)
+
+static int ci_ulpi_wait(struct ci_hdrc *ci, u32 mask)
+{
+	unsigned long usec = 10000;
+
+	while (usec--) {
+		if (!hw_read(ci, OP_ULPI_VIEWPORT, mask))
+			return 0;
+
+		udelay(1);
+	}
+
+	return -ETIMEDOUT;
+}
+
+static int ci_ulpi_read(struct device *dev, u8 addr)
+{
+	struct ci_hdrc *ci = dev_get_drvdata(dev);
+	int ret;
+
+	hw_write(ci, OP_ULPI_VIEWPORT, 0xffffffff, ULPI_WRITE | ULPI_WAKEUP);
+	ret = ci_ulpi_wait(ci, ULPI_WAKEUP);
+	if (ret)
+		return ret;
+
+	hw_write(ci, OP_ULPI_VIEWPORT, 0xffffffff, ULPI_RUN | ULPI_ADDR(addr));
+	ret = ci_ulpi_wait(ci, ULPI_RUN);
+	if (ret)
+		return ret;
+
+	return hw_read(ci, OP_ULPI_VIEWPORT, GENMASK(15, 8)) >> 8;
+}
+
+static int ci_ulpi_write(struct device *dev, u8 addr, u8 val)
+{
+	struct ci_hdrc *ci = dev_get_drvdata(dev);
+	int ret;
+
+	hw_write(ci, OP_ULPI_VIEWPORT, 0xffffffff, ULPI_WRITE | ULPI_WAKEUP);
+	ret = ci_ulpi_wait(ci, ULPI_WAKEUP);
+	if (ret)
+		return ret;
+
+	hw_write(ci, OP_ULPI_VIEWPORT, 0xffffffff,
+		 ULPI_RUN | ULPI_WRITE | ULPI_ADDR(addr) | val);
+	return ci_ulpi_wait(ci, ULPI_RUN);
+}
+
+int ci_ulpi_init(struct ci_hdrc *ci)
+{
+	if (ci->platdata->phy_mode != USBPHY_INTERFACE_MODE_ULPI)
+		return 0;
+
+	/*
+	 * Set PORTSC correctly so we can read/write ULPI registers for
+	 * identification purposes
+	 */
+	hw_phymode_configure(ci);
+
+	ci->ulpi_ops.read = ci_ulpi_read;
+	ci->ulpi_ops.write = ci_ulpi_write;
+	ci->ulpi = ulpi_register_interface(ci->dev, &ci->ulpi_ops);
+	if (IS_ERR(ci->ulpi))
+		dev_err(ci->dev, "failed to register ULPI interface");
+
+	return PTR_ERR_OR_ZERO(ci->ulpi);
+}
+
+void ci_ulpi_exit(struct ci_hdrc *ci)
+{
+	if (ci->ulpi) {
+		ulpi_unregister_interface(ci->ulpi);
+		ci->ulpi = NULL;
+	}
+}
+
+int ci_ulpi_resume(struct ci_hdrc *ci)
+{
+	int cnt = 100000;
+
+	while (cnt-- > 0) {
+		if (hw_read(ci, OP_ULPI_VIEWPORT, ULPI_SYNC_STATE))
+			return 0;
+		udelay(1);
+	}
+
+	return -ETIMEDOUT;
+}
diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index e35b1508d3eb..235e305f8473 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -913,7 +913,6 @@ static int get_serial_info(struct acm *acm, struct serial_struct __user *info)
 	struct serial_struct tmp;
 
 	memset(&tmp, 0, sizeof(tmp));
-	tmp.flags = ASYNC_LOW_LATENCY;
 	tmp.xmit_fifo_size = acm->writesize;
 	tmp.baud_base = le32_to_cpu(acm->line.dwDTERate);
 	tmp.close_delay	= acm->port.close_delay / 10;
diff --git a/drivers/usb/class/cdc-wdm.c b/drivers/usb/class/cdc-wdm.c
index 0a6369510f2d..8fda45a45bd3 100644
--- a/drivers/usb/class/cdc-wdm.c
+++ b/drivers/usb/class/cdc-wdm.c
@@ -531,7 +531,7 @@ retry:
 		i++;
 		if (file->f_flags & O_NONBLOCK) {
 			if (!test_bit(WDM_READ, &desc->flags)) {
-				rv = cntr ? cntr : -EAGAIN;
+				rv = -EAGAIN;
 				goto err;
 			}
 			rv = 0;
diff --git a/drivers/usb/common/ulpi.c b/drivers/usb/common/ulpi.c
index 8b317702d761..c9480d77810c 100644
--- a/drivers/usb/common/ulpi.c
+++ b/drivers/usb/common/ulpi.c
@@ -16,6 +16,9 @@
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/acpi.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/clk/clk-conf.h>
 
 /* -------------------------------------------------------------------------- */
 
@@ -39,6 +42,10 @@ static int ulpi_match(struct device *dev, struct device_driver *driver)
 	struct ulpi *ulpi = to_ulpi_dev(dev);
 	const struct ulpi_device_id *id;
 
+	/* Some ULPI devices don't have a vendor id so rely on OF match */
+	if (ulpi->id.vendor == 0)
+		return of_driver_match_device(dev, driver);
+
 	for (id = drv->id_table; id->vendor; id++)
 		if (id->vendor == ulpi->id.vendor &&
 		    id->product == ulpi->id.product)
@@ -50,6 +57,11 @@ static int ulpi_match(struct device *dev, struct device_driver *driver)
 static int ulpi_uevent(struct device *dev, struct kobj_uevent_env *env)
 {
 	struct ulpi *ulpi = to_ulpi_dev(dev);
+	int ret;
+
+	ret = of_device_uevent_modalias(dev, env);
+	if (ret != -ENODEV)
+		return ret;
 
 	if (add_uevent_var(env, "MODALIAS=ulpi:v%04xp%04x",
 			   ulpi->id.vendor, ulpi->id.product))
@@ -60,6 +72,11 @@ static int ulpi_uevent(struct device *dev, struct kobj_uevent_env *env)
 static int ulpi_probe(struct device *dev)
 {
 	struct ulpi_driver *drv = to_ulpi_driver(dev->driver);
+	int ret;
+
+	ret = of_clk_set_defaults(dev->of_node, false);
+	if (ret < 0)
+		return ret;
 
 	return drv->probe(to_ulpi_dev(dev));
 }
@@ -87,8 +104,13 @@ static struct bus_type ulpi_bus = {
 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,
 			     char *buf)
 {
+	int len;
 	struct ulpi *ulpi = to_ulpi_dev(dev);
 
+	len = of_device_get_modalias(dev, buf, PAGE_SIZE - 1);
+	if (len != -ENODEV)
+		return len;
+
 	return sprintf(buf, "ulpi:v%04xp%04x\n",
 		       ulpi->id.vendor, ulpi->id.product);
 }
@@ -153,23 +175,45 @@ EXPORT_SYMBOL_GPL(ulpi_unregister_driver);
 
 /* -------------------------------------------------------------------------- */
 
-static int ulpi_register(struct device *dev, struct ulpi *ulpi)
+static int ulpi_of_register(struct ulpi *ulpi)
 {
-	int ret;
+	struct device_node *np = NULL, *child;
+	struct device *parent;
+
+	/* Find a ulpi bus underneath the parent or the grandparent */
+	parent = ulpi->dev.parent;
+	if (parent->of_node)
+		np = of_find_node_by_name(parent->of_node, "ulpi");
+	else if (parent->parent && parent->parent->of_node)
+		np = of_find_node_by_name(parent->parent->of_node, "ulpi");
+	if (!np)
+		return 0;
+
+	child = of_get_next_available_child(np, NULL);
+	of_node_put(np);
+	if (!child)
+		return -EINVAL;
 
-	ulpi->dev.parent = dev; /* needed early for ops */
+	ulpi->dev.of_node = child;
+
+	return 0;
+}
+
+static int ulpi_read_id(struct ulpi *ulpi)
+{
+	int ret;
 
 	/* Test the interface */
 	ret = ulpi_write(ulpi, ULPI_SCRATCH, 0xaa);
 	if (ret < 0)
-		return ret;
+		goto err;
 
 	ret = ulpi_read(ulpi, ULPI_SCRATCH);
 	if (ret < 0)
 		return ret;
 
 	if (ret != 0xaa)
-		return -ENODEV;
+		goto err;
 
 	ulpi->id.vendor = ulpi_read(ulpi, ULPI_VENDOR_ID_LOW);
 	ulpi->id.vendor |= ulpi_read(ulpi, ULPI_VENDOR_ID_HIGH) << 8;
@@ -177,13 +221,35 @@ static int ulpi_register(struct device *dev, struct ulpi *ulpi)
 	ulpi->id.product = ulpi_read(ulpi, ULPI_PRODUCT_ID_LOW);
 	ulpi->id.product |= ulpi_read(ulpi, ULPI_PRODUCT_ID_HIGH) << 8;
 
+	/* Some ULPI devices don't have a vendor id so rely on OF match */
+	if (ulpi->id.vendor == 0)
+		goto err;
+
+	request_module("ulpi:v%04xp%04x", ulpi->id.vendor, ulpi->id.product);
+	return 0;
+err:
+	of_device_request_module(&ulpi->dev);
+	return 0;
+}
+
+static int ulpi_register(struct device *dev, struct ulpi *ulpi)
+{
+	int ret;
+
+	ulpi->dev.parent = dev; /* needed early for ops */
 	ulpi->dev.bus = &ulpi_bus;
 	ulpi->dev.type = &ulpi_dev_type;
 	dev_set_name(&ulpi->dev, "%s.ulpi", dev_name(dev));
 
 	ACPI_COMPANION_SET(&ulpi->dev, ACPI_COMPANION(dev));
 
-	request_module("ulpi:v%04xp%04x", ulpi->id.vendor, ulpi->id.product);
+	ret = ulpi_of_register(ulpi);
+	if (ret)
+		return ret;
+
+	ret = ulpi_read_id(ulpi);
+	if (ret)
+		return ret;
 
 	ret = device_register(&ulpi->dev);
 	if (ret)
@@ -234,6 +300,7 @@ EXPORT_SYMBOL_GPL(ulpi_register_interface);
  */
 void ulpi_unregister_interface(struct ulpi *ulpi)
 {
+	of_node_put(ulpi->dev.of_node);
 	device_unregister(&ulpi->dev);
 }
 EXPORT_SYMBOL_GPL(ulpi_unregister_interface);
diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c
index 4016dae7433b..52747b6ac89a 100644
--- a/drivers/usb/core/devio.c
+++ b/drivers/usb/core/devio.c
@@ -134,42 +134,35 @@ enum snoop_when {
 #define USB_DEVICE_DEV		MKDEV(USB_DEVICE_MAJOR, 0)
 
 /* Limit on the total amount of memory we can allocate for transfers */
-static unsigned usbfs_memory_mb = 16;
+static u32 usbfs_memory_mb = 16;
 module_param(usbfs_memory_mb, uint, 0644);
 MODULE_PARM_DESC(usbfs_memory_mb,
 		"maximum MB allowed for usbfs buffers (0 = no limit)");
 
-/* Hard limit, necessary to avoid arithmetic overflow */
-#define USBFS_XFER_MAX		(UINT_MAX / 2 - 1000000)
-
-static atomic_t usbfs_memory_usage;	/* Total memory currently allocated */
+static atomic64_t usbfs_memory_usage;	/* Total memory currently allocated */
 
 /* Check whether it's okay to allocate more memory for a transfer */
-static int usbfs_increase_memory_usage(unsigned amount)
+static int usbfs_increase_memory_usage(u64 amount)
 {
-	unsigned lim;
+	u64 lim;
 
-	/*
-	 * Convert usbfs_memory_mb to bytes, avoiding overflows.
-	 * 0 means use the hard limit (effectively unlimited).
-	 */
 	lim = ACCESS_ONCE(usbfs_memory_mb);
-	if (lim == 0 || lim > (USBFS_XFER_MAX >> 20))
-		lim = USBFS_XFER_MAX;
-	else
-		lim <<= 20;
+	lim <<= 20;
 
-	atomic_add(amount, &usbfs_memory_usage);
-	if (atomic_read(&usbfs_memory_usage) <= lim)
-		return 0;
-	atomic_sub(amount, &usbfs_memory_usage);
-	return -ENOMEM;
+	atomic64_add(amount, &usbfs_memory_usage);
+
+	if (lim > 0 && atomic64_read(&usbfs_memory_usage) > lim) {
+		atomic64_sub(amount, &usbfs_memory_usage);
+		return -ENOMEM;
+	}
+
+	return 0;
 }
 
 /* Memory for a transfer is being deallocated */
-static void usbfs_decrease_memory_usage(unsigned amount)
+static void usbfs_decrease_memory_usage(u64 amount)
 {
-	atomic_sub(amount, &usbfs_memory_usage);
+	atomic64_sub(amount, &usbfs_memory_usage);
 }
 
 static int connected(struct usb_dev_state *ps)
@@ -1191,7 +1184,7 @@ static int proc_bulk(struct usb_dev_state *ps, void __user *arg)
 	if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN)))
 		return -EINVAL;
 	len1 = bulk.len;
-	if (len1 >= USBFS_XFER_MAX)
+	if (len1 >= (INT_MAX - sizeof(struct urb)))
 		return -EINVAL;
 	ret = usbfs_increase_memory_usage(len1 + sizeof(struct urb));
 	if (ret)
@@ -1584,10 +1577,6 @@ static int proc_do_submiturb(struct usb_dev_state *ps, struct usbdevfs_urb *uurb
 		return -EINVAL;
 	}
 
-	if (uurb->buffer_length >= USBFS_XFER_MAX) {
-		ret = -EINVAL;
-		goto error;
-	}
 	if (uurb->buffer_length > 0 &&
 			!access_ok(is_in ? VERIFY_WRITE : VERIFY_READ,
 				uurb->buffer, uurb->buffer_length)) {
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index 479e223f9cff..612fab6e54fb 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -3017,6 +3017,7 @@ void usb_remove_hcd(struct usb_hcd *hcd)
 	}
 
 	usb_put_invalidate_rhdev(hcd);
+	hcd->flags = 0;
 }
 EXPORT_SYMBOL_GPL(usb_remove_hcd);
 
diff --git a/drivers/usb/core/message.c b/drivers/usb/core/message.c
index dea55914d641..2184ef40a82a 100644
--- a/drivers/usb/core/message.c
+++ b/drivers/usb/core/message.c
@@ -122,12 +122,11 @@ static int usb_internal_control_msg(struct usb_device *usb_dev,
  * This function sends a simple control message to a specified endpoint and
  * waits for the message to complete, or timeout.
  *
- * Don't use this function from within an interrupt context, like a bottom half
- * handler.  If you need an asynchronous message, or need to send a message
- * from within interrupt context, use usb_submit_urb().
- * If a thread in your driver uses this call, make sure your disconnect()
- * method can wait for it to complete.  Since you don't have a handle on the
- * URB used, you can't cancel the request.
+ * Don't use this function from within an interrupt context. If you need
+ * an asynchronous message, or need to send a message from within interrupt
+ * context, use usb_submit_urb(). If a thread in your driver uses this call,
+ * make sure your disconnect() method can wait for it to complete. Since you
+ * don't have a handle on the URB used, you can't cancel the request.
  *
  * Return: If successful, the number of bytes transferred. Otherwise, a negative
  * error number.
@@ -173,12 +172,11 @@ EXPORT_SYMBOL_GPL(usb_control_msg);
  * This function sends a simple interrupt message to a specified endpoint and
  * waits for the message to complete, or timeout.
  *
- * Don't use this function from within an interrupt context, like a bottom half
- * handler.  If you need an asynchronous message, or need to send a message
- * from within interrupt context, use usb_submit_urb() If a thread in your
- * driver uses this call, make sure your disconnect() method can wait for it to
- * complete.  Since you don't have a handle on the URB used, you can't cancel
- * the request.
+ * Don't use this function from within an interrupt context. If you need
+ * an asynchronous message, or need to send a message from within interrupt
+ * context, use usb_submit_urb() If a thread in your driver uses this call,
+ * make sure your disconnect() method can wait for it to complete. Since you
+ * don't have a handle on the URB used, you can't cancel the request.
  *
  * Return:
  * If successful, 0. Otherwise a negative error number. The number of actual
@@ -207,12 +205,11 @@ EXPORT_SYMBOL_GPL(usb_interrupt_msg);
  * This function sends a simple bulk message to a specified endpoint
  * and waits for the message to complete, or timeout.
  *
- * Don't use this function from within an interrupt context, like a bottom half
- * handler.  If you need an asynchronous message, or need to send a message
- * from within interrupt context, use usb_submit_urb() If a thread in your
- * driver uses this call, make sure your disconnect() method can wait for it to
- * complete.  Since you don't have a handle on the URB used, you can't cancel
- * the request.
+ * Don't use this function from within an interrupt context. If you need
+ * an asynchronous message, or need to send a message from within interrupt
+ * context, use usb_submit_urb() If a thread in your driver uses this call,
+ * make sure your disconnect() method can wait for it to complete. Since you
+ * don't have a handle on the URB used, you can't cancel the request.
  *
  * Because there is no usb_interrupt_msg() and no USBDEVFS_INTERRUPT ioctl,
  * users are forced to abuse this routine by using it to submit URBs for
diff --git a/drivers/usb/dwc2/core.c b/drivers/usb/dwc2/core.c
index 11d8ae9aead1..1b6612c2cdda 100644
--- a/drivers/usb/dwc2/core.c
+++ b/drivers/usb/dwc2/core.c
@@ -104,7 +104,7 @@ static int dwc2_restore_global_registers(struct dwc2_hsotg *hsotg)
 	gr = &hsotg->gr_backup;
 	if (!gr->valid) {
 		dev_err(hsotg->dev, "%s: no global registers to restore\n",
-				__func__);
+			__func__);
 		return -EINVAL;
 	}
 	gr->valid = false;
@@ -155,21 +155,21 @@ int dwc2_exit_hibernation(struct dwc2_hsotg *hsotg, bool restore)
 		ret = dwc2_restore_global_registers(hsotg);
 		if (ret) {
 			dev_err(hsotg->dev, "%s: failed to restore registers\n",
-					__func__);
+				__func__);
 			return ret;
 		}
 		if (dwc2_is_host_mode(hsotg)) {
 			ret = dwc2_restore_host_registers(hsotg);
 			if (ret) {
 				dev_err(hsotg->dev, "%s: failed to restore host registers\n",
-						__func__);
+					__func__);
 				return ret;
 			}
 		} else {
 			ret = dwc2_restore_device_registers(hsotg);
 			if (ret) {
 				dev_err(hsotg->dev, "%s: failed to restore device registers\n",
-						__func__);
+					__func__);
 				return ret;
 			}
 		}
@@ -195,7 +195,7 @@ int dwc2_enter_hibernation(struct dwc2_hsotg *hsotg)
 	ret = dwc2_backup_global_registers(hsotg);
 	if (ret) {
 		dev_err(hsotg->dev, "%s: failed to backup global registers\n",
-				__func__);
+			__func__);
 		return ret;
 	}
 
@@ -203,14 +203,14 @@ int dwc2_enter_hibernation(struct dwc2_hsotg *hsotg)
 		ret = dwc2_backup_host_registers(hsotg);
 		if (ret) {
 			dev_err(hsotg->dev, "%s: failed to backup host registers\n",
-					__func__);
+				__func__);
 			return ret;
 		}
 	} else {
 		ret = dwc2_backup_device_registers(hsotg);
 		if (ret) {
 			dev_err(hsotg->dev, "%s: failed to backup device registers\n",
-					__func__);
+				__func__);
 			return ret;
 		}
 	}
@@ -313,7 +313,7 @@ static bool dwc2_iddig_filter_enabled(struct dwc2_hsotg *hsotg)
  * Do core a soft reset of the core.  Be careful with this because it
  * resets all the internal state machines of the core.
  */
-int dwc2_core_reset(struct dwc2_hsotg *hsotg)
+int dwc2_core_reset(struct dwc2_hsotg *hsotg, bool skip_wait)
 {
 	u32 greset;
 	int count = 0;
@@ -369,7 +369,7 @@ int dwc2_core_reset(struct dwc2_hsotg *hsotg)
 		}
 	} while (!(greset & GRSTCTL_AHBIDLE));
 
-	if (wait_for_host_mode)
+	if (wait_for_host_mode && !skip_wait)
 		dwc2_wait_for_mode(hsotg, true);
 
 	return 0;
@@ -455,7 +455,7 @@ void dwc2_clear_force_mode(struct dwc2_hsotg *hsotg)
 	dwc2_writel(gusbcfg, hsotg->regs + GUSBCFG);
 
 	if (dwc2_iddig_filter_enabled(hsotg))
-		usleep_range(100000, 110000);
+		msleep(100);
 }
 
 /*
@@ -500,7 +500,7 @@ int dwc2_core_reset_and_force_dr_mode(struct dwc2_hsotg *hsotg)
 {
 	int retval;
 
-	retval = dwc2_core_reset(hsotg);
+	retval = dwc2_core_reset(hsotg, false);
 	if (retval)
 		return retval;
 
@@ -541,7 +541,7 @@ void dwc2_dump_host_registers(struct dwc2_hsotg *hsotg)
 	addr = hsotg->regs + HAINTMSK;
 	dev_dbg(hsotg->dev, "HAINTMSK	 @0x%08lX : 0x%08X\n",
 		(unsigned long)addr, dwc2_readl(addr));
-	if (hsotg->params.dma_desc_enable > 0) {
+	if (hsotg->params.dma_desc_enable) {
 		addr = hsotg->regs + HFLBADDR;
 		dev_dbg(hsotg->dev, "HFLBADDR @0x%08lX : 0x%08X\n",
 			(unsigned long)addr, dwc2_readl(addr));
@@ -571,7 +571,7 @@ void dwc2_dump_host_registers(struct dwc2_hsotg *hsotg)
 		addr = hsotg->regs + HCDMA(i);
 		dev_dbg(hsotg->dev, "HCDMA	 @0x%08lX : 0x%08X\n",
 			(unsigned long)addr, dwc2_readl(addr));
-		if (hsotg->params.dma_desc_enable > 0) {
+		if (hsotg->params.dma_desc_enable) {
 			addr = hsotg->regs + HCDMAB(i);
 			dev_dbg(hsotg->dev, "HCDMAB	 @0x%08lX : 0x%08X\n",
 				(unsigned long)addr, dwc2_readl(addr));
@@ -751,11 +751,6 @@ bool dwc2_force_mode_if_needed(struct dwc2_hsotg *hsotg, bool host)
 	return dwc2_force_mode(hsotg, host);
 }
 
-u16 dwc2_get_otg_version(struct dwc2_hsotg *hsotg)
-{
-	return hsotg->params.otg_ver == 1 ? 0x0200 : 0x0103;
-}
-
 bool dwc2_is_controller_alive(struct dwc2_hsotg *hsotg)
 {
 	if (dwc2_readl(hsotg->regs + GSNPSID) == 0xffffffff)
@@ -793,7 +788,7 @@ void dwc2_disable_global_interrupts(struct dwc2_hsotg *hsotg)
 }
 
 /* Returns the controller's GHWCFG2.OTG_MODE. */
-unsigned dwc2_op_mode(struct dwc2_hsotg *hsotg)
+unsigned int dwc2_op_mode(struct dwc2_hsotg *hsotg)
 {
 	u32 ghwcfg2 = dwc2_readl(hsotg->regs + GHWCFG2);
 
@@ -804,7 +799,7 @@ unsigned dwc2_op_mode(struct dwc2_hsotg *hsotg)
 /* Returns true if the controller is capable of DRD. */
 bool dwc2_hw_is_otg(struct dwc2_hsotg *hsotg)
 {
-	unsigned op_mode = dwc2_op_mode(hsotg);
+	unsigned int op_mode = dwc2_op_mode(hsotg);
 
 	return (op_mode == GHWCFG2_OP_MODE_HNP_SRP_CAPABLE) ||
 		(op_mode == GHWCFG2_OP_MODE_SRP_ONLY_CAPABLE) ||
@@ -814,7 +809,7 @@ bool dwc2_hw_is_otg(struct dwc2_hsotg *hsotg)
 /* Returns true if the controller is host-only. */
 bool dwc2_hw_is_host(struct dwc2_hsotg *hsotg)
 {
-	unsigned op_mode = dwc2_op_mode(hsotg);
+	unsigned int op_mode = dwc2_op_mode(hsotg);
 
 	return (op_mode == GHWCFG2_OP_MODE_SRP_CAPABLE_HOST) ||
 		(op_mode == GHWCFG2_OP_MODE_NO_SRP_CAPABLE_HOST);
@@ -823,7 +818,7 @@ bool dwc2_hw_is_host(struct dwc2_hsotg *hsotg)
 /* Returns true if the controller is device-only. */
 bool dwc2_hw_is_device(struct dwc2_hsotg *hsotg)
 {
-	unsigned op_mode = dwc2_op_mode(hsotg);
+	unsigned int op_mode = dwc2_op_mode(hsotg);
 
 	return (op_mode == GHWCFG2_OP_MODE_SRP_CAPABLE_DEVICE) ||
 		(op_mode == GHWCFG2_OP_MODE_NO_SRP_CAPABLE_DEVICE);
diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h
index 302b8f5f7d27..1a7e83005082 100644
--- a/drivers/usb/dwc2/core.h
+++ b/drivers/usb/dwc2/core.h
@@ -127,6 +127,8 @@ static const char * const dwc2_hsotg_supply_names[] = {
 	"vusb_a",               /* analog USB supply, 1.1V */
 };
 
+#define DWC2_NUM_SUPPLIES ARRAY_SIZE(dwc2_hsotg_supply_names)
+
 /*
  * EP0_MPS_LIMIT
  *
@@ -246,7 +248,8 @@ struct dwc2_hsotg_req {
 	void *saved_req_buf;
 };
 
-#if IS_ENABLED(CONFIG_USB_DWC2_PERIPHERAL) || IS_ENABLED(CONFIG_USB_DWC2_DUAL_ROLE)
+#if IS_ENABLED(CONFIG_USB_DWC2_PERIPHERAL) || \
+	IS_ENABLED(CONFIG_USB_DWC2_DUAL_ROLE)
 #define call_gadget(_hs, _entry) \
 do { \
 	if ((_hs)->gadget.speed != USB_SPEED_UNKNOWN && \
@@ -271,13 +274,6 @@ enum dwc2_lx_state {
 	DWC2_L3,	/* Off state */
 };
 
-/*
- * Gadget periodic tx fifo sizes as used by legacy driver
- * EP0 is not included
- */
-#define DWC2_G_P_LEGACY_TX_FIFO_SIZE {256, 256, 256, 256, 768, 768, 768, \
-					   768, 0, 0, 0, 0, 0, 0, 0}
-
 /* Gadget ep0 states */
 enum dwc2_ep0_state {
 	DWC2_EP0_SETUP,
@@ -295,9 +291,6 @@ enum dwc2_ep0_state {
  *                       1 - SRP Only capable
  *                       2 - No HNP/SRP capable (always available)
  *                      Defaults to best available option (0, 1, then 2)
- * @otg_ver:            OTG version supported
- *                       0 - 1.3 (default)
- *                       1 - 2.0
  * @host_dma:           Specifies whether to use slave or DMA mode for accessing
  *                      the data FIFOs. The driver will automatically detect the
  *                      value for this parameter if none is specified.
@@ -444,6 +437,11 @@ enum dwc2_ep0_state {
  *			in DWORDS with possible values from from
  *			16-32768 (default: 256, 256, 256, 256, 768,
  *			768, 768, 768, 0, 0, 0, 0, 0, 0, 0).
+ * @change_speed_quirk: Change speed configuration to DWC2_SPEED_PARAM_FULL
+ *                      while full&low speed device connect. And change speed
+ *                      back to DWC2_SPEED_PARAM_HIGH while device is gone.
+ *			0 - No (default)
+ *			1 - Yes
  *
  * The following parameters may be specified when starting the module. These
  * parameters define how the DWC_otg controller should be configured. A
@@ -452,63 +450,48 @@ enum dwc2_ep0_state {
  * default described above.
  */
 struct dwc2_core_params {
-	/*
-	 * Don't add any non-int members here, this will break
-	 * dwc2_set_all_params!
-	 */
-	int otg_cap;
+	u8 otg_cap;
 #define DWC2_CAP_PARAM_HNP_SRP_CAPABLE		0
 #define DWC2_CAP_PARAM_SRP_ONLY_CAPABLE		1
 #define DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE	2
 
-	int otg_ver;
-	int dma_desc_enable;
-	int dma_desc_fs_enable;
-	int speed;
-#define DWC2_SPEED_PARAM_HIGH	0
-#define DWC2_SPEED_PARAM_FULL	1
-#define DWC2_SPEED_PARAM_LOW	2
-
-	int enable_dynamic_fifo;
-	int en_multiple_tx_fifo;
-	int host_rx_fifo_size;
-	int host_nperio_tx_fifo_size;
-	int host_perio_tx_fifo_size;
-	int max_transfer_size;
-	int max_packet_count;
-	int host_channels;
-	int phy_type;
+	u8 phy_type;
 #define DWC2_PHY_TYPE_PARAM_FS		0
 #define DWC2_PHY_TYPE_PARAM_UTMI	1
 #define DWC2_PHY_TYPE_PARAM_ULPI	2
 
-	int phy_utmi_width;
-	int phy_ulpi_ddr;
-	int phy_ulpi_ext_vbus;
-#define DWC2_PHY_ULPI_INTERNAL_VBUS	0
-#define DWC2_PHY_ULPI_EXTERNAL_VBUS	1
-
-	int i2c_enable;
-	int ulpi_fs_ls;
-	int host_support_fs_ls_low_power;
-	int host_ls_low_power_phy_clk;
-#define DWC2_HOST_LS_LOW_POWER_PHY_CLK_PARAM_48MHZ	0
-#define DWC2_HOST_LS_LOW_POWER_PHY_CLK_PARAM_6MHZ	1
-
-	int ts_dline;
-	int reload_ctl;
-	int ahbcfg;
-	int uframe_sched;
-	int external_id_pin_ctl;
-	int hibernation;
+	u8 speed;
+#define DWC2_SPEED_PARAM_HIGH	0
+#define DWC2_SPEED_PARAM_FULL	1
+#define DWC2_SPEED_PARAM_LOW	2
 
-	/*
-	 * The following parameters are *only* set via device
-	 * properties and cannot be set directly in this structure.
-	 */
+	u8 phy_utmi_width;
+	bool phy_ulpi_ddr;
+	bool phy_ulpi_ext_vbus;
+	bool enable_dynamic_fifo;
+	bool en_multiple_tx_fifo;
+	bool i2c_enable;
+	bool ulpi_fs_ls;
+	bool ts_dline;
+	bool reload_ctl;
+	bool uframe_sched;
+	bool external_id_pin_ctl;
+	bool hibernation;
+	u16 max_packet_count;
+	u32 max_transfer_size;
+	u32 ahbcfg;
 
 	/* Host parameters */
 	bool host_dma;
+	bool dma_desc_enable;
+	bool dma_desc_fs_enable;
+	bool host_support_fs_ls_low_power;
+	bool host_ls_low_power_phy_clk;
+
+	u8 host_channels;
+	u16 host_rx_fifo_size;
+	u16 host_nperio_tx_fifo_size;
+	u16 host_perio_tx_fifo_size;
 
 	/* Gadget parameters */
 	bool g_dma;
@@ -516,6 +499,8 @@ struct dwc2_core_params {
 	u32 g_rx_fifo_size;
 	u32 g_np_tx_fifo_size;
 	u32 g_tx_fifo_size[MAX_EPS_CHANNELS];
+
+	bool change_speed_quirk;
 };
 
 /**
@@ -603,8 +588,8 @@ struct dwc2_hw_params {
 #define DWC2_CTRL_BUFF_SIZE 8
 
 /**
- * struct dwc2_gregs_backup - Holds global registers state before entering partial
- * power down
+ * struct dwc2_gregs_backup - Holds global registers state before
+ * entering partial power down
  * @gotgctl:		Backup of GOTGCTL register
  * @gintmsk:		Backup of GINTMSK register
  * @gahbcfg:		Backup of GAHBCFG register
@@ -634,8 +619,8 @@ struct dwc2_gregs_backup {
 };
 
 /**
- * struct  dwc2_dregs_backup - Holds device registers state before entering partial
- * power down
+ * struct dwc2_dregs_backup - Holds device registers state before
+ * entering partial power down
  * @dcfg:		Backup of DCFG register
  * @dctl:		Backup of DCTL register
  * @daintmsk:		Backup of DAINTMSK register
@@ -664,8 +649,8 @@ struct dwc2_dregs_backup {
 };
 
 /**
- * struct  dwc2_hregs_backup - Holds host registers state before entering partial
- * power down
+ * struct dwc2_hregs_backup - Holds host registers state before
+ * entering partial power down
  * @hcfg:		Backup of HCFG register
  * @haintmsk:		Backup of HAINTMSK register
  * @hcintmsk:		Backup of HCINTMSK register
@@ -782,9 +767,10 @@ struct dwc2_hregs_backup {
  * @gadget_enabled	Peripheral mode sub-driver initialization indicator.
  * @ll_hw_enabled	Status of low-level hardware resources.
  * @phy:                The otg phy transceiver structure for phy control.
- * @uphy:               The otg phy transceiver structure for old USB phy control.
- * @plat:               The platform specific configuration data. This can be removed once
- *                      all SoCs support usb transceiver.
+ * @uphy:               The otg phy transceiver structure for old USB phy
+ *                      control.
+ * @plat:               The platform specific configuration data. This can be
+ *                      removed once all SoCs support usb transceiver.
  * @supplies:           Definition of USB power supplies
  * @phyif:              PHY interface width
  * @lock:		Spinlock that protects all the driver data structures
@@ -921,7 +907,7 @@ struct dwc2_hsotg {
 	struct phy *phy;
 	struct usb_phy *uphy;
 	struct dwc2_hsotg_plat *plat;
-	struct regulator_bulk_data supplies[ARRAY_SIZE(dwc2_hsotg_supply_names)];
+	struct regulator_bulk_data supplies[DWC2_NUM_SUPPLIES];
 	u32 phyif;
 
 	spinlock_t lock;
@@ -947,6 +933,7 @@ struct dwc2_hsotg {
 	/* DWC OTG HW Release versions */
 #define DWC2_CORE_REV_2_71a	0x4f54271a
 #define DWC2_CORE_REV_2_90a	0x4f54290a
+#define DWC2_CORE_REV_2_91a	0x4f54291a
 #define DWC2_CORE_REV_2_92a	0x4f54292a
 #define DWC2_CORE_REV_2_94a	0x4f54294a
 #define DWC2_CORE_REV_3_00a	0x4f54300a
@@ -1033,7 +1020,8 @@ struct dwc2_hsotg {
 #endif
 #endif /* CONFIG_USB_DWC2_HOST || CONFIG_USB_DWC2_DUAL_ROLE */
 
-#if IS_ENABLED(CONFIG_USB_DWC2_PERIPHERAL) || IS_ENABLED(CONFIG_USB_DWC2_DUAL_ROLE)
+#if IS_ENABLED(CONFIG_USB_DWC2_PERIPHERAL) || \
+	IS_ENABLED(CONFIG_USB_DWC2_DUAL_ROLE)
 	/* Gadget structures */
 	struct usb_gadget_driver *driver;
 	int fifo_mem;
@@ -1101,37 +1089,37 @@ static inline bool dwc2_is_hs_iot(struct dwc2_hsotg *hsotg)
  * The following functions support initialization of the core driver component
  * and the DWC_otg controller
  */
-extern int dwc2_core_reset(struct dwc2_hsotg *hsotg);
-extern int dwc2_core_reset_and_force_dr_mode(struct dwc2_hsotg *hsotg);
-extern int dwc2_enter_hibernation(struct dwc2_hsotg *hsotg);
-extern int dwc2_exit_hibernation(struct dwc2_hsotg *hsotg, bool restore);
+int dwc2_core_reset(struct dwc2_hsotg *hsotg, bool skip_wait);
+int dwc2_core_reset_and_force_dr_mode(struct dwc2_hsotg *hsotg);
+int dwc2_enter_hibernation(struct dwc2_hsotg *hsotg);
+int dwc2_exit_hibernation(struct dwc2_hsotg *hsotg, bool restore);
 
 bool dwc2_force_mode_if_needed(struct dwc2_hsotg *hsotg, bool host);
 void dwc2_clear_force_mode(struct dwc2_hsotg *hsotg);
 void dwc2_force_dr_mode(struct dwc2_hsotg *hsotg);
 
-extern bool dwc2_is_controller_alive(struct dwc2_hsotg *hsotg);
+bool dwc2_is_controller_alive(struct dwc2_hsotg *hsotg);
 
 /*
  * Common core Functions.
  * The following functions support managing the DWC_otg controller in either
  * device or host mode.
  */
-extern void dwc2_read_packet(struct dwc2_hsotg *hsotg, u8 *dest, u16 bytes);
-extern void dwc2_flush_tx_fifo(struct dwc2_hsotg *hsotg, const int num);
-extern void dwc2_flush_rx_fifo(struct dwc2_hsotg *hsotg);
+void dwc2_read_packet(struct dwc2_hsotg *hsotg, u8 *dest, u16 bytes);
+void dwc2_flush_tx_fifo(struct dwc2_hsotg *hsotg, const int num);
+void dwc2_flush_rx_fifo(struct dwc2_hsotg *hsotg);
 
-extern void dwc2_enable_global_interrupts(struct dwc2_hsotg *hcd);
-extern void dwc2_disable_global_interrupts(struct dwc2_hsotg *hcd);
+void dwc2_enable_global_interrupts(struct dwc2_hsotg *hcd);
+void dwc2_disable_global_interrupts(struct dwc2_hsotg *hcd);
 
 /* This function should be called on every hardware interrupt. */
-extern irqreturn_t dwc2_handle_common_intr(int irq, void *dev);
+irqreturn_t dwc2_handle_common_intr(int irq, void *dev);
 
 /* The device ID match table */
 extern const struct of_device_id dwc2_of_match_table[];
 
-extern int dwc2_lowlevel_hw_enable(struct dwc2_hsotg *hsotg);
-extern int dwc2_lowlevel_hw_disable(struct dwc2_hsotg *hsotg);
+int dwc2_lowlevel_hw_enable(struct dwc2_hsotg *hsotg);
+int dwc2_lowlevel_hw_disable(struct dwc2_hsotg *hsotg);
 
 /* Parameters */
 int dwc2_get_hwparams(struct dwc2_hsotg *hsotg);
@@ -1145,7 +1133,7 @@ int dwc2_init_params(struct dwc2_hsotg *hsotg);
  * are read in and cached so they always read directly from the
  * GHWCFG2 register.
  */
-unsigned dwc2_op_mode(struct dwc2_hsotg *hsotg);
+unsigned int dwc2_op_mode(struct dwc2_hsotg *hsotg);
 bool dwc2_hw_is_otg(struct dwc2_hsotg *hsotg);
 bool dwc2_hw_is_host(struct dwc2_hsotg *hsotg);
 bool dwc2_hw_is_device(struct dwc2_hsotg *hsotg);
@@ -1157,6 +1145,7 @@ static inline int dwc2_is_host_mode(struct dwc2_hsotg *hsotg)
 {
 	return (dwc2_readl(hsotg->regs + GINTSTS) & GINTSTS_CURMODE_HOST) != 0;
 }
+
 static inline int dwc2_is_device_mode(struct dwc2_hsotg *hsotg)
 {
 	return (dwc2_readl(hsotg->regs + GINTSTS) & GINTSTS_CURMODE_HOST) == 0;
@@ -1165,29 +1154,28 @@ static inline int dwc2_is_device_mode(struct dwc2_hsotg *hsotg)
 /*
  * Dump core registers and SPRAM
  */
-extern void dwc2_dump_dev_registers(struct dwc2_hsotg *hsotg);
-extern void dwc2_dump_host_registers(struct dwc2_hsotg *hsotg);
-extern void dwc2_dump_global_registers(struct dwc2_hsotg *hsotg);
-
-/*
- * Return OTG version - either 1.3 or 2.0
- */
-extern u16 dwc2_get_otg_version(struct dwc2_hsotg *hsotg);
+void dwc2_dump_dev_registers(struct dwc2_hsotg *hsotg);
+void dwc2_dump_host_registers(struct dwc2_hsotg *hsotg);
+void dwc2_dump_global_registers(struct dwc2_hsotg *hsotg);
 
 /* Gadget defines */
-#if IS_ENABLED(CONFIG_USB_DWC2_PERIPHERAL) || IS_ENABLED(CONFIG_USB_DWC2_DUAL_ROLE)
-extern int dwc2_hsotg_remove(struct dwc2_hsotg *hsotg);
-extern int dwc2_hsotg_suspend(struct dwc2_hsotg *dwc2);
-extern int dwc2_hsotg_resume(struct dwc2_hsotg *dwc2);
-extern int dwc2_gadget_init(struct dwc2_hsotg *hsotg, int irq);
-extern void dwc2_hsotg_core_init_disconnected(struct dwc2_hsotg *dwc2,
-		bool reset);
-extern void dwc2_hsotg_core_connect(struct dwc2_hsotg *hsotg);
-extern void dwc2_hsotg_disconnect(struct dwc2_hsotg *dwc2);
-extern int dwc2_hsotg_set_test_mode(struct dwc2_hsotg *hsotg, int testmode);
+#if IS_ENABLED(CONFIG_USB_DWC2_PERIPHERAL) || \
+	IS_ENABLED(CONFIG_USB_DWC2_DUAL_ROLE)
+int dwc2_hsotg_remove(struct dwc2_hsotg *hsotg);
+int dwc2_hsotg_suspend(struct dwc2_hsotg *dwc2);
+int dwc2_hsotg_resume(struct dwc2_hsotg *dwc2);
+int dwc2_gadget_init(struct dwc2_hsotg *hsotg, int irq);
+void dwc2_hsotg_core_init_disconnected(struct dwc2_hsotg *dwc2,
+				       bool reset);
+void dwc2_hsotg_core_connect(struct dwc2_hsotg *hsotg);
+void dwc2_hsotg_disconnect(struct dwc2_hsotg *dwc2);
+int dwc2_hsotg_set_test_mode(struct dwc2_hsotg *hsotg, int testmode);
 #define dwc2_is_device_connected(hsotg) (hsotg->connected)
 int dwc2_backup_device_registers(struct dwc2_hsotg *hsotg);
 int dwc2_restore_device_registers(struct dwc2_hsotg *hsotg);
+int dwc2_hsotg_tx_fifo_count(struct dwc2_hsotg *hsotg);
+int dwc2_hsotg_tx_fifo_total_depth(struct dwc2_hsotg *hsotg);
+int dwc2_hsotg_tx_fifo_average_depth(struct dwc2_hsotg *hsotg);
 #else
 static inline int dwc2_hsotg_remove(struct dwc2_hsotg *dwc2)
 { return 0; }
@@ -1198,25 +1186,31 @@ static inline int dwc2_hsotg_resume(struct dwc2_hsotg *dwc2)
 static inline int dwc2_gadget_init(struct dwc2_hsotg *hsotg, int irq)
 { return 0; }
 static inline void dwc2_hsotg_core_init_disconnected(struct dwc2_hsotg *dwc2,
-		bool reset) {}
+						     bool reset) {}
 static inline void dwc2_hsotg_core_connect(struct dwc2_hsotg *hsotg) {}
 static inline void dwc2_hsotg_disconnect(struct dwc2_hsotg *dwc2) {}
 static inline int dwc2_hsotg_set_test_mode(struct dwc2_hsotg *hsotg,
-							int testmode)
+					   int testmode)
 { return 0; }
 #define dwc2_is_device_connected(hsotg) (0)
 static inline int dwc2_backup_device_registers(struct dwc2_hsotg *hsotg)
 { return 0; }
 static inline int dwc2_restore_device_registers(struct dwc2_hsotg *hsotg)
 { return 0; }
+static inline int dwc2_hsotg_tx_fifo_count(struct dwc2_hsotg *hsotg)
+{ return 0; }
+static inline int dwc2_hsotg_tx_fifo_total_depth(struct dwc2_hsotg *hsotg)
+{ return 0; }
+static inline int dwc2_hsotg_tx_fifo_average_depth(struct dwc2_hsotg *hsotg)
+{ return 0; }
 #endif
 
 #if IS_ENABLED(CONFIG_USB_DWC2_HOST) || IS_ENABLED(CONFIG_USB_DWC2_DUAL_ROLE)
-extern int dwc2_hcd_get_frame_number(struct dwc2_hsotg *hsotg);
-extern int dwc2_hcd_get_future_frame_number(struct dwc2_hsotg *hsotg, int us);
-extern void dwc2_hcd_connect(struct dwc2_hsotg *hsotg);
-extern void dwc2_hcd_disconnect(struct dwc2_hsotg *hsotg, bool force);
-extern void dwc2_hcd_start(struct dwc2_hsotg *hsotg);
+int dwc2_hcd_get_frame_number(struct dwc2_hsotg *hsotg);
+int dwc2_hcd_get_future_frame_number(struct dwc2_hsotg *hsotg, int us);
+void dwc2_hcd_connect(struct dwc2_hsotg *hsotg);
+void dwc2_hcd_disconnect(struct dwc2_hsotg *hsotg, bool force);
+void dwc2_hcd_start(struct dwc2_hsotg *hsotg);
 int dwc2_backup_host_registers(struct dwc2_hsotg *hsotg);
 int dwc2_restore_host_registers(struct dwc2_hsotg *hsotg);
 #else
@@ -1229,7 +1223,7 @@ static inline void dwc2_hcd_connect(struct dwc2_hsotg *hsotg) {}
 static inline void dwc2_hcd_disconnect(struct dwc2_hsotg *hsotg, bool force) {}
 static inline void dwc2_hcd_start(struct dwc2_hsotg *hsotg) {}
 static inline void dwc2_hcd_remove(struct dwc2_hsotg *hsotg) {}
-static inline int dwc2_hcd_init(struct dwc2_hsotg *hsotg, int irq)
+static inline int dwc2_hcd_init(struct dwc2_hsotg *hsotg)
 { return 0; }
 static inline int dwc2_backup_host_registers(struct dwc2_hsotg *hsotg)
 { return 0; }
diff --git a/drivers/usb/dwc2/core_intr.c b/drivers/usb/dwc2/core_intr.c
index 5b228ba6045f..b8bcb007c92a 100644
--- a/drivers/usb/dwc2/core_intr.c
+++ b/drivers/usb/dwc2/core_intr.c
@@ -159,9 +159,8 @@ static void dwc2_handle_otg_intr(struct dwc2_hsotg *hsotg)
 			" ++OTG Interrupt: Session Request Success Status Change++\n");
 		gotgctl = dwc2_readl(hsotg->regs + GOTGCTL);
 		if (gotgctl & GOTGCTL_SESREQSCS) {
-			if (hsotg->params.phy_type ==
-					DWC2_PHY_TYPE_PARAM_FS
-			    && hsotg->params.i2c_enable > 0) {
+			if (hsotg->params.phy_type == DWC2_PHY_TYPE_PARAM_FS &&
+			    hsotg->params.i2c_enable) {
 				hsotg->srp_success = 1;
 			} else {
 				/* Clear Session Request */
@@ -317,7 +316,7 @@ static void dwc2_handle_session_req_intr(struct dwc2_hsotg *hsotg)
 	dwc2_writel(GINTSTS_SESSREQINT, hsotg->regs + GINTSTS);
 
 	dev_dbg(hsotg->dev, "Session request interrupt - lx_state=%d\n",
-							hsotg->lx_state);
+		hsotg->lx_state);
 
 	if (dwc2_is_device_mode(hsotg)) {
 		if (hsotg->lx_state == DWC2_L2) {
@@ -437,7 +436,7 @@ static void dwc2_handle_usb_suspend_intr(struct dwc2_hsotg *hsotg)
 			/* Ignore suspend request before enumeration */
 			if (!dwc2_is_device_connected(hsotg)) {
 				dev_dbg(hsotg->dev,
-						"ignore suspend request before enumeration\n");
+					"ignore suspend request before enumeration\n");
 				return;
 			}
 
@@ -445,7 +444,7 @@ static void dwc2_handle_usb_suspend_intr(struct dwc2_hsotg *hsotg)
 			if (ret) {
 				if (ret != -ENOTSUPP)
 					dev_err(hsotg->dev,
-							"enter hibernation failed\n");
+						"enter hibernation failed\n");
 				goto skip_power_saving;
 			}
 
diff --git a/drivers/usb/dwc2/debug.h b/drivers/usb/dwc2/debug.h
index 12dbd1daec87..8222783e6822 100644
--- a/drivers/usb/dwc2/debug.h
+++ b/drivers/usb/dwc2/debug.h
@@ -17,8 +17,8 @@
 #include "core.h"
 
 #ifdef CONFIG_DEBUG_FS
-extern int dwc2_debugfs_init(struct dwc2_hsotg *);
-extern void dwc2_debugfs_exit(struct dwc2_hsotg *);
+int dwc2_debugfs_init(struct dwc2_hsotg *hsotg);
+void dwc2_debugfs_exit(struct dwc2_hsotg *hsotg);
 #else
 static inline int dwc2_debugfs_init(struct dwc2_hsotg *hsotg)
 {  return 0;  }
diff --git a/drivers/usb/dwc2/debugfs.c b/drivers/usb/dwc2/debugfs.c
index 0a130916a91c..794b959a7c8c 100644
--- a/drivers/usb/dwc2/debugfs.c
+++ b/drivers/usb/dwc2/debugfs.c
@@ -137,7 +137,7 @@ static int state_show(struct seq_file *seq, void *v)
 	int idx;
 
 	seq_printf(seq, "DCFG=0x%08x, DCTL=0x%08x, DSTS=0x%08x\n",
-		 dwc2_readl(regs + DCFG),
+		   dwc2_readl(regs + DCFG),
 		 dwc2_readl(regs + DCTL),
 		 dwc2_readl(regs + DSTS));
 
@@ -338,23 +338,23 @@ static void dwc2_hsotg_create_debug(struct dwc2_hsotg *hsotg)
 {
 	struct dentry *root;
 	struct dentry *file;
-	unsigned epidx;
+	unsigned int epidx;
 
 	root = hsotg->debug_root;
 
 	/* create general state file */
 
-	file = debugfs_create_file("state", S_IRUGO, root, hsotg, &state_fops);
+	file = debugfs_create_file("state", 0444, root, hsotg, &state_fops);
 	if (IS_ERR(file))
 		dev_err(hsotg->dev, "%s: failed to create state\n", __func__);
 
-	file = debugfs_create_file("testmode", S_IRUGO | S_IWUSR, root, hsotg,
-							&testmode_fops);
+	file = debugfs_create_file("testmode", 0644, root, hsotg,
+				   &testmode_fops);
 	if (IS_ERR(file))
 		dev_err(hsotg->dev, "%s: failed to create testmode\n",
-				__func__);
+			__func__);
 
-	file = debugfs_create_file("fifo", S_IRUGO, root, hsotg, &fifo_fops);
+	file = debugfs_create_file("fifo", 0444, root, hsotg, &fifo_fops);
 	if (IS_ERR(file))
 		dev_err(hsotg->dev, "%s: failed to create fifo\n", __func__);
 
@@ -364,8 +364,8 @@ static void dwc2_hsotg_create_debug(struct dwc2_hsotg *hsotg)
 
 		ep = hsotg->eps_out[epidx];
 		if (ep) {
-			file = debugfs_create_file(ep->name, S_IRUGO,
-							  root, ep, &ep_fops);
+			file = debugfs_create_file(ep->name, 0444,
+						   root, ep, &ep_fops);
 			if (IS_ERR(file))
 				dev_err(hsotg->dev, "failed to create %s debug file\n",
 					ep->name);
@@ -377,8 +377,8 @@ static void dwc2_hsotg_create_debug(struct dwc2_hsotg *hsotg)
 
 		ep = hsotg->eps_in[epidx];
 		if (ep) {
-			file = debugfs_create_file(ep->name, S_IRUGO,
-							  root, ep, &ep_fops);
+			file = debugfs_create_file(ep->name, 0444,
+						   root, ep, &ep_fops);
 			if (IS_ERR(file))
 				dev_err(hsotg->dev, "failed to create %s debug file\n",
 					ep->name);
@@ -725,6 +725,143 @@ static const struct debugfs_reg32 dwc2_regs[] = {
 	dump_register(HCDMAB(15)),
 };
 
+#define print_param(_seq, _ptr, _param) \
+seq_printf((_seq), "%-30s: %d\n", #_param, (_ptr)->_param)
+
+#define print_param_hex(_seq, _ptr, _param) \
+seq_printf((_seq), "%-30s: 0x%x\n", #_param, (_ptr)->_param)
+
+static int params_show(struct seq_file *seq, void *v)
+{
+	struct dwc2_hsotg *hsotg = seq->private;
+	struct dwc2_core_params *p = &hsotg->params;
+	int i;
+
+	print_param(seq, p, otg_cap);
+	print_param(seq, p, dma_desc_enable);
+	print_param(seq, p, dma_desc_fs_enable);
+	print_param(seq, p, speed);
+	print_param(seq, p, enable_dynamic_fifo);
+	print_param(seq, p, en_multiple_tx_fifo);
+	print_param(seq, p, host_rx_fifo_size);
+	print_param(seq, p, host_nperio_tx_fifo_size);
+	print_param(seq, p, host_perio_tx_fifo_size);
+	print_param(seq, p, max_transfer_size);
+	print_param(seq, p, max_packet_count);
+	print_param(seq, p, host_channels);
+	print_param(seq, p, phy_type);
+	print_param(seq, p, phy_utmi_width);
+	print_param(seq, p, phy_ulpi_ddr);
+	print_param(seq, p, phy_ulpi_ext_vbus);
+	print_param(seq, p, i2c_enable);
+	print_param(seq, p, ulpi_fs_ls);
+	print_param(seq, p, host_support_fs_ls_low_power);
+	print_param(seq, p, host_ls_low_power_phy_clk);
+	print_param(seq, p, ts_dline);
+	print_param(seq, p, reload_ctl);
+	print_param_hex(seq, p, ahbcfg);
+	print_param(seq, p, uframe_sched);
+	print_param(seq, p, external_id_pin_ctl);
+	print_param(seq, p, hibernation);
+	print_param(seq, p, host_dma);
+	print_param(seq, p, g_dma);
+	print_param(seq, p, g_dma_desc);
+	print_param(seq, p, g_rx_fifo_size);
+	print_param(seq, p, g_np_tx_fifo_size);
+
+	for (i = 0; i < MAX_EPS_CHANNELS; i++) {
+		char str[32];
+
+		snprintf(str, 32, "g_tx_fifo_size[%d]", i);
+		seq_printf(seq, "%-30s: %d\n", str, p->g_tx_fifo_size[i]);
+	}
+
+	return 0;
+}
+
+static int params_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, params_show, inode->i_private);
+}
+
+static const struct file_operations params_fops = {
+	.owner		= THIS_MODULE,
+	.open		= params_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+
+static int hw_params_show(struct seq_file *seq, void *v)
+{
+	struct dwc2_hsotg *hsotg = seq->private;
+	struct dwc2_hw_params *hw = &hsotg->hw_params;
+
+	print_param(seq, hw, op_mode);
+	print_param(seq, hw, arch);
+	print_param(seq, hw, dma_desc_enable);
+	print_param(seq, hw, enable_dynamic_fifo);
+	print_param(seq, hw, en_multiple_tx_fifo);
+	print_param(seq, hw, rx_fifo_size);
+	print_param(seq, hw, host_nperio_tx_fifo_size);
+	print_param(seq, hw, dev_nperio_tx_fifo_size);
+	print_param(seq, hw, host_perio_tx_fifo_size);
+	print_param(seq, hw, nperio_tx_q_depth);
+	print_param(seq, hw, host_perio_tx_q_depth);
+	print_param(seq, hw, dev_token_q_depth);
+	print_param(seq, hw, max_transfer_size);
+	print_param(seq, hw, max_packet_count);
+	print_param(seq, hw, host_channels);
+	print_param(seq, hw, hs_phy_type);
+	print_param(seq, hw, fs_phy_type);
+	print_param(seq, hw, i2c_enable);
+	print_param(seq, hw, num_dev_ep);
+	print_param(seq, hw, num_dev_perio_in_ep);
+	print_param(seq, hw, total_fifo_size);
+	print_param(seq, hw, power_optimized);
+	print_param(seq, hw, utmi_phy_data_width);
+	print_param_hex(seq, hw, snpsid);
+	print_param_hex(seq, hw, dev_ep_dirs);
+
+	return 0;
+}
+
+static int hw_params_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, hw_params_show, inode->i_private);
+}
+
+static const struct file_operations hw_params_fops = {
+	.owner		= THIS_MODULE,
+	.open		= hw_params_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+
+static int dr_mode_show(struct seq_file *seq, void *v)
+{
+	struct dwc2_hsotg *hsotg = seq->private;
+	const char *dr_mode = "";
+
+	device_property_read_string(hsotg->dev, "dr_mode", &dr_mode);
+	seq_printf(seq, "%s\n", dr_mode);
+	return 0;
+}
+
+static int dr_mode_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, dr_mode_show, inode->i_private);
+}
+
+static const struct file_operations dr_mode_fops = {
+	.owner		= THIS_MODULE,
+	.open		= dr_mode_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+
 int dwc2_debugfs_init(struct dwc2_hsotg *hsotg)
 {
 	int			ret;
@@ -736,6 +873,25 @@ int dwc2_debugfs_init(struct dwc2_hsotg *hsotg)
 		goto err0;
 	}
 
+	file = debugfs_create_file("params", 0444,
+				   hsotg->debug_root,
+				   hsotg, &params_fops);
+	if (IS_ERR(file))
+		dev_err(hsotg->dev, "%s: failed to create params\n", __func__);
+
+	file = debugfs_create_file("hw_params", 0444,
+				   hsotg->debug_root,
+				   hsotg, &hw_params_fops);
+	if (IS_ERR(file))
+		dev_err(hsotg->dev, "%s: failed to create hw_params\n",
+			__func__);
+
+	file = debugfs_create_file("dr_mode", 0444,
+				   hsotg->debug_root,
+				   hsotg, &dr_mode_fops);
+	if (IS_ERR(file))
+		dev_err(hsotg->dev, "%s: failed to create dr_mode\n", __func__);
+
 	/* Add gadget debugfs nodes */
 	dwc2_hsotg_create_debug(hsotg);
 
@@ -750,8 +906,8 @@ int dwc2_debugfs_init(struct dwc2_hsotg *hsotg)
 	hsotg->regset->nregs = ARRAY_SIZE(dwc2_regs);
 	hsotg->regset->base = hsotg->regs;
 
-	file = debugfs_create_regset32("regdump", S_IRUGO, hsotg->debug_root,
-								hsotg->regset);
+	file = debugfs_create_regset32("regdump", 0444, hsotg->debug_root,
+				       hsotg->regset);
 	if (!file) {
 		ret = -ENOMEM;
 		goto err1;
diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index 77c5fcf3a5bf..bc3b3fda5000 100644
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -171,7 +171,7 @@ static void dwc2_hsotg_disable_gsint(struct dwc2_hsotg *hsotg, u32 ints)
  * request.
  */
 static void dwc2_hsotg_ctrl_epint(struct dwc2_hsotg *hsotg,
-				 unsigned int ep, unsigned int dir_in,
+				  unsigned int ep, unsigned int dir_in,
 				 unsigned int en)
 {
 	unsigned long flags;
@@ -192,6 +192,99 @@ static void dwc2_hsotg_ctrl_epint(struct dwc2_hsotg *hsotg,
 }
 
 /**
+ * dwc2_hsotg_tx_fifo_count - return count of TX FIFOs in device mode
+ */
+int dwc2_hsotg_tx_fifo_count(struct dwc2_hsotg *hsotg)
+{
+	if (hsotg->hw_params.en_multiple_tx_fifo)
+		/* In dedicated FIFO mode we need count of IN EPs */
+		return (dwc2_readl(hsotg->regs + GHWCFG4)  &
+			GHWCFG4_NUM_IN_EPS_MASK) >> GHWCFG4_NUM_IN_EPS_SHIFT;
+	else
+		/* In shared FIFO mode we need count of Periodic IN EPs */
+		return hsotg->hw_params.num_dev_perio_in_ep;
+}
+
+/**
+ * dwc2_hsotg_ep_info_size - return Endpoint Info Control block size in DWORDs
+ */
+static int dwc2_hsotg_ep_info_size(struct dwc2_hsotg *hsotg)
+{
+	int val = 0;
+	int i;
+	u32 ep_dirs;
+
+	/*
+	 * Don't need additional space for ep info control registers in
+	 * slave mode.
+	 */
+	if (!using_dma(hsotg)) {
+		dev_dbg(hsotg->dev, "Buffer DMA ep info size 0\n");
+		return 0;
+	}
+
+	/*
+	 * Buffer DMA mode - 1 location per endpoit
+	 * Descriptor DMA mode - 4 locations per endpoint
+	 */
+	ep_dirs = hsotg->hw_params.dev_ep_dirs;
+
+	for (i = 0; i <= hsotg->hw_params.num_dev_ep; i++) {
+		val += ep_dirs & 3 ? 1 : 2;
+		ep_dirs >>= 2;
+	}
+
+	if (using_desc_dma(hsotg))
+		val = val * 4;
+
+	return val;
+}
+
+/**
+ * dwc2_hsotg_tx_fifo_total_depth - return total FIFO depth available for
+ * device mode TX FIFOs
+ */
+int dwc2_hsotg_tx_fifo_total_depth(struct dwc2_hsotg *hsotg)
+{
+	int ep_info_size;
+	int addr;
+	int tx_addr_max;
+	u32 np_tx_fifo_size;
+
+	np_tx_fifo_size = min_t(u32, hsotg->hw_params.dev_nperio_tx_fifo_size,
+				hsotg->params.g_np_tx_fifo_size);
+
+	/* Get Endpoint Info Control block size in DWORDs. */
+	ep_info_size = dwc2_hsotg_ep_info_size(hsotg);
+	tx_addr_max = hsotg->hw_params.total_fifo_size - ep_info_size;
+
+	addr = hsotg->params.g_rx_fifo_size + np_tx_fifo_size;
+	if (tx_addr_max <= addr)
+		return 0;
+
+	return tx_addr_max - addr;
+}
+
+/**
+ * dwc2_hsotg_tx_fifo_average_depth - returns average depth of device mode
+ * TX FIFOs
+ */
+int dwc2_hsotg_tx_fifo_average_depth(struct dwc2_hsotg *hsotg)
+{
+	int tx_fifo_count;
+	int tx_fifo_depth;
+
+	tx_fifo_depth = dwc2_hsotg_tx_fifo_total_depth(hsotg);
+
+	tx_fifo_count = dwc2_hsotg_tx_fifo_count(hsotg);
+
+	if (!tx_fifo_count)
+		return tx_fifo_depth;
+	else
+		return tx_fifo_depth / tx_fifo_count;
+}
+
+/**
  * dwc2_hsotg_init_fifo - initialise non-periodic FIFOs
  * @hsotg: The device instance.
  */
@@ -241,6 +334,9 @@ static void dwc2_hsotg_init_fifo(struct dwc2_hsotg *hsotg)
 		val = dwc2_readl(hsotg->regs + DPTXFSIZN(ep));
 	}
 
+	dwc2_writel(hsotg->hw_params.total_fifo_size |
+		    addr << GDFIFOCFG_EPINFOBASE_SHIFT,
+		    hsotg->regs + GDFIFOCFG);
 	/*
 	 * according to p428 of the design guide, we need to ensure that
 	 * all fifos are flushed before continuing
@@ -277,11 +373,11 @@ static void dwc2_hsotg_init_fifo(struct dwc2_hsotg *hsotg)
  * Allocate a new USB request structure appropriate for the specified endpoint
  */
 static struct usb_request *dwc2_hsotg_ep_alloc_request(struct usb_ep *ep,
-						      gfp_t flags)
+						       gfp_t flags)
 {
 	struct dwc2_hsotg_req *req;
 
-	req = kzalloc(sizeof(struct dwc2_hsotg_req), flags);
+	req = kzalloc(sizeof(*req), flags);
 	if (!req)
 		return NULL;
 
@@ -312,10 +408,11 @@ static inline int is_ep_periodic(struct dwc2_hsotg_ep *hs_ep)
  * of a request to ensure the buffer is ready for access by the caller.
  */
 static void dwc2_hsotg_unmap_dma(struct dwc2_hsotg *hsotg,
-				struct dwc2_hsotg_ep *hs_ep,
+				 struct dwc2_hsotg_ep *hs_ep,
 				struct dwc2_hsotg_req *hs_req)
 {
 	struct usb_request *req = &hs_req->req;
+
 	usb_gadget_unmap_request(&hsotg->gadget, req, hs_ep->dir_in);
 }
 
@@ -384,7 +481,7 @@ fail:
  * This routine is only needed for PIO
  */
 static int dwc2_hsotg_write_fifo(struct dwc2_hsotg *hsotg,
-				struct dwc2_hsotg_ep *hs_ep,
+				 struct dwc2_hsotg_ep *hs_ep,
 				struct dwc2_hsotg_req *hs_req)
 {
 	bool periodic = is_ep_periodic(hs_ep);
@@ -466,7 +563,7 @@ static int dwc2_hsotg_write_fifo(struct dwc2_hsotg *hsotg,
 	max_transfer = hs_ep->ep.maxpacket * hs_ep->mc;
 
 	dev_dbg(hsotg->dev, "%s: GNPTXSTS=%08x, can=%d, to=%d, max_transfer %d\n",
-		 __func__, gnptxsts, can_write, to_write, max_transfer);
+		__func__, gnptxsts, can_write, to_write, max_transfer);
 
 	/*
 	 * limit to 512 bytes of data, it seems at least on the non-periodic
@@ -487,7 +584,7 @@ static int dwc2_hsotg_write_fifo(struct dwc2_hsotg *hsotg,
 		/* it's needed only when we do not use dedicated fifos */
 		if (!hsotg->dedicated_fifos)
 			dwc2_hsotg_en_gsint(hsotg,
-					   periodic ? GINTSTS_PTXFEMP :
+					    periodic ? GINTSTS_PTXFEMP :
 					   GINTSTS_NPTXFEMP);
 	}
 
@@ -516,12 +613,12 @@ static int dwc2_hsotg_write_fifo(struct dwc2_hsotg *hsotg,
 		/* it's needed only when we do not use dedicated fifos */
 		if (!hsotg->dedicated_fifos)
 			dwc2_hsotg_en_gsint(hsotg,
-					   periodic ? GINTSTS_PTXFEMP :
+					    periodic ? GINTSTS_PTXFEMP :
 					   GINTSTS_NPTXFEMP);
 	}
 
 	dev_dbg(hsotg->dev, "write %d/%d, can_write %d, done %d\n",
-		 to_write, hs_req->req.length, can_write, buf_pos);
+		to_write, hs_req->req.length, can_write, buf_pos);
 
 	if (to_write <= 0)
 		return -ENOSPC;
@@ -547,17 +644,17 @@ static int dwc2_hsotg_write_fifo(struct dwc2_hsotg *hsotg,
  * Return the maximum data that can be queued in one go on a given endpoint
  * so that transfers that are too long can be split.
  */
-static unsigned get_ep_limit(struct dwc2_hsotg_ep *hs_ep)
+static unsigned int get_ep_limit(struct dwc2_hsotg_ep *hs_ep)
 {
 	int index = hs_ep->index;
-	unsigned maxsize;
-	unsigned maxpkt;
+	unsigned int maxsize;
+	unsigned int maxpkt;
 
 	if (index != 0) {
 		maxsize = DXEPTSIZ_XFERSIZE_LIMIT + 1;
 		maxpkt = DXEPTSIZ_PKTCNT_LIMIT + 1;
 	} else {
-		maxsize = 64+64;
+		maxsize = 64 + 64;
 		if (hs_ep->dir_in)
 			maxpkt = DIEPTSIZ0_PKTCNT_LIMIT + 1;
 		else
@@ -580,11 +677,11 @@ static unsigned get_ep_limit(struct dwc2_hsotg_ep *hs_ep)
 }
 
 /**
-* dwc2_hsotg_read_frameno - read current frame number
-* @hsotg: The device instance
-*
-* Return the current frame number
-*/
+ * dwc2_hsotg_read_frameno - read current frame number
+ * @hsotg: The device instance
+ *
+ * Return the current frame number
+ */
 static u32 dwc2_hsotg_read_frameno(struct dwc2_hsotg *hsotg)
 {
 	u32 dsts;
@@ -874,7 +971,7 @@ static void dwc2_gadget_start_isoc_ddma(struct dwc2_hsotg_ep *hs_ep)
  * appropriately, and writing any data to the FIFOs.
  */
 static void dwc2_hsotg_start_req(struct dwc2_hsotg *hsotg,
-				struct dwc2_hsotg_ep *hs_ep,
+				 struct dwc2_hsotg_ep *hs_ep,
 				struct dwc2_hsotg_req *hs_req,
 				bool continuing)
 {
@@ -885,9 +982,9 @@ static void dwc2_hsotg_start_req(struct dwc2_hsotg *hsotg,
 	u32 epsize_reg;
 	u32 epsize;
 	u32 ctrl;
-	unsigned length;
-	unsigned packets;
-	unsigned maxreq;
+	unsigned int length;
+	unsigned int packets;
+	unsigned int maxreq;
 	unsigned int dma_reg;
 
 	if (index != 0) {
@@ -966,7 +1063,7 @@ static void dwc2_hsotg_start_req(struct dwc2_hsotg *hsotg,
 	if (dir_in && ureq->zero && !continuing) {
 		/* Test if zlp is actually required. */
 		if ((ureq->length >= hs_ep->ep.maxpacket) &&
-					!(ureq->length % hs_ep->ep.maxpacket))
+		    !(ureq->length % hs_ep->ep.maxpacket))
 			hs_ep->send_zlp = 1;
 	}
 
@@ -1070,7 +1167,7 @@ static void dwc2_hsotg_start_req(struct dwc2_hsotg *hsotg,
 	/* check ep is enabled */
 	if (!(dwc2_readl(hsotg->regs + epctrl_reg) & DXEPCTL_EPENA))
 		dev_dbg(hsotg->dev,
-			 "ep%d: failed to become enabled (DXEPCTL=0x%08x)?\n",
+			"ep%d: failed to become enabled (DXEPCTL=0x%08x)?\n",
 			 index, dwc2_readl(hsotg->regs + epctrl_reg));
 
 	dev_dbg(hsotg->dev, "%s: DXEPCTL=0x%08x\n",
@@ -1093,7 +1190,7 @@ static void dwc2_hsotg_start_req(struct dwc2_hsotg *hsotg,
  * cleanup on completion.
  */
 static int dwc2_hsotg_map_dma(struct dwc2_hsotg *hsotg,
-			     struct dwc2_hsotg_ep *hs_ep,
+			      struct dwc2_hsotg_ep *hs_ep,
 			     struct usb_request *req)
 {
 	int ret;
@@ -1112,7 +1209,8 @@ dma_error:
 }
 
 static int dwc2_hsotg_handle_unaligned_buf_start(struct dwc2_hsotg *hsotg,
-	struct dwc2_hsotg_ep *hs_ep, struct dwc2_hsotg_req *hs_req)
+						 struct dwc2_hsotg_ep *hs_ep,
+						 struct dwc2_hsotg_req *hs_req)
 {
 	void *req_buf = hs_req->req.buf;
 
@@ -1123,7 +1221,7 @@ static int dwc2_hsotg_handle_unaligned_buf_start(struct dwc2_hsotg *hsotg,
 	WARN_ON(hs_req->saved_req_buf);
 
 	dev_dbg(hsotg->dev, "%s: %s: buf=%p length=%d\n", __func__,
-			hs_ep->ep.name, req_buf, hs_req->req.length);
+		hs_ep->ep.name, req_buf, hs_req->req.length);
 
 	hs_req->req.buf = kmalloc(hs_req->req.length, GFP_ATOMIC);
 	if (!hs_req->req.buf) {
@@ -1142,8 +1240,10 @@ static int dwc2_hsotg_handle_unaligned_buf_start(struct dwc2_hsotg *hsotg,
 	return 0;
 }
 
-static void dwc2_hsotg_handle_unaligned_buf_complete(struct dwc2_hsotg *hsotg,
-	struct dwc2_hsotg_ep *hs_ep, struct dwc2_hsotg_req *hs_req)
+static void
+dwc2_hsotg_handle_unaligned_buf_complete(struct dwc2_hsotg *hsotg,
+					 struct dwc2_hsotg_ep *hs_ep,
+					 struct dwc2_hsotg_req *hs_req)
 {
 	/* If dma is not being used or buffer was aligned */
 	if (!using_dma(hsotg) || !hs_req->saved_req_buf)
@@ -1155,7 +1255,7 @@ static void dwc2_hsotg_handle_unaligned_buf_complete(struct dwc2_hsotg *hsotg,
 	/* Copy data from bounce buffer on successful out transfer */
 	if (!hs_ep->dir_in && !hs_req->req.status)
 		memcpy(hs_req->saved_req_buf, hs_req->req.buf,
-							hs_req->req.actual);
+		       hs_req->req.actual);
 
 	/* Free bounce buffer */
 	kfree(hs_req->req.buf);
@@ -1224,7 +1324,7 @@ static int dwc2_gadget_set_ep0_desc_chain(struct dwc2_hsotg *hsotg,
 }
 
 static int dwc2_hsotg_ep_queue(struct usb_ep *ep, struct usb_request *req,
-			      gfp_t gfp_flags)
+			       gfp_t gfp_flags)
 {
 	struct dwc2_hsotg_req *hs_req = our_req(req);
 	struct dwc2_hsotg_ep *hs_ep = our_ep(ep);
@@ -1239,7 +1339,7 @@ static int dwc2_hsotg_ep_queue(struct usb_ep *ep, struct usb_request *req,
 	/* Prevent new request submission when controller is suspended */
 	if (hs->lx_state == DWC2_L2) {
 		dev_dbg(hs->dev, "%s: don't submit request while suspended\n",
-				__func__);
+			__func__);
 		return -EAGAIN;
 	}
 
@@ -1300,7 +1400,7 @@ static int dwc2_hsotg_ep_queue(struct usb_ep *ep, struct usb_request *req,
 }
 
 static int dwc2_hsotg_ep_queue_lock(struct usb_ep *ep, struct usb_request *req,
-			      gfp_t gfp_flags)
+				    gfp_t gfp_flags)
 {
 	struct dwc2_hsotg_ep *hs_ep = our_ep(ep);
 	struct dwc2_hsotg *hs = hs_ep->parent;
@@ -1315,7 +1415,7 @@ static int dwc2_hsotg_ep_queue_lock(struct usb_ep *ep, struct usb_request *req,
 }
 
 static void dwc2_hsotg_ep_free_request(struct usb_ep *ep,
-				      struct usb_request *req)
+				       struct usb_request *req)
 {
 	struct dwc2_hsotg_req *hs_req = our_req(req);
 
@@ -1331,7 +1431,7 @@ static void dwc2_hsotg_ep_free_request(struct usb_ep *ep,
  * submitted that need cleaning up.
  */
 static void dwc2_hsotg_complete_oursetup(struct usb_ep *ep,
-					struct usb_request *req)
+					 struct usb_request *req)
 {
 	struct dwc2_hsotg_ep *hs_ep = our_ep(ep);
 	struct dwc2_hsotg *hsotg = hs_ep->parent;
@@ -1350,7 +1450,7 @@ static void dwc2_hsotg_complete_oursetup(struct usb_ep *ep,
  * structure, or return NULL if it is not a valid endpoint.
  */
 static struct dwc2_hsotg_ep *ep_from_windex(struct dwc2_hsotg *hsotg,
-					   u32 windex)
+					    u32 windex)
 {
 	struct dwc2_hsotg_ep *ep;
 	int dir = (windex & USB_DIR_IN) ? 1 : 0;
@@ -1407,7 +1507,7 @@ int dwc2_hsotg_set_test_mode(struct dwc2_hsotg *hsotg, int testmode)
  * an internal method of sending replies to certain control requests, etc.
  */
 static int dwc2_hsotg_send_reply(struct dwc2_hsotg *hsotg,
-				struct dwc2_hsotg_ep *ep,
+				 struct dwc2_hsotg_ep *ep,
 				void *buff,
 				int length)
 {
@@ -1450,7 +1550,7 @@ static int dwc2_hsotg_send_reply(struct dwc2_hsotg *hsotg,
  * @ctrl: USB control request
  */
 static int dwc2_hsotg_process_req_status(struct dwc2_hsotg *hsotg,
-					struct usb_ctrlrequest *ctrl)
+					 struct usb_ctrlrequest *ctrl)
 {
 	struct dwc2_hsotg_ep *ep0 = hsotg->eps_out[0];
 	struct dwc2_hsotg_ep *ep;
@@ -1466,8 +1566,11 @@ static int dwc2_hsotg_process_req_status(struct dwc2_hsotg *hsotg,
 
 	switch (ctrl->bRequestType & USB_RECIP_MASK) {
 	case USB_RECIP_DEVICE:
-		reply = cpu_to_le16(0); /* bit 0 => self powered,
-					 * bit 1 => remote wakeup */
+		/*
+		 * bit 0 => self powered
+		 * bit 1 => remote wakeup
+		 */
+		reply = cpu_to_le16(0);
 		break;
 
 	case USB_RECIP_INTERFACE:
@@ -1555,7 +1658,7 @@ static void dwc2_gadget_start_next_request(struct dwc2_hsotg_ep *hs_ep)
  * @ctrl: USB control request
  */
 static int dwc2_hsotg_process_req_feature(struct dwc2_hsotg *hsotg,
-					 struct usb_ctrlrequest *ctrl)
+					  struct usb_ctrlrequest *ctrl)
 {
 	struct dwc2_hsotg_ep *ep0 = hsotg->eps_out[0];
 	struct dwc2_hsotg_req *hs_req;
@@ -1640,9 +1743,8 @@ static int dwc2_hsotg_process_req_feature(struct dwc2_hsotg *hsotg,
 				}
 
 				/* If we have pending request, then start it */
-				if (!ep->req) {
+				if (!ep->req)
 					dwc2_gadget_start_next_request(ep);
-				}
 			}
 
 			break;
@@ -1705,7 +1807,7 @@ static void dwc2_hsotg_stall_ep0(struct dwc2_hsotg *hsotg)
  * gadget driver).
  */
 static void dwc2_hsotg_process_control(struct dwc2_hsotg *hsotg,
-				      struct usb_ctrlrequest *ctrl)
+				       struct usb_ctrlrequest *ctrl)
 {
 	struct dwc2_hsotg_ep *ep0 = hsotg->eps_out[0];
 	int ret = 0;
@@ -1781,7 +1883,7 @@ static void dwc2_hsotg_process_control(struct dwc2_hsotg *hsotg,
  * EP0 setup packets
  */
 static void dwc2_hsotg_complete_setup(struct usb_ep *ep,
-				     struct usb_request *req)
+				      struct usb_request *req)
 {
 	struct dwc2_hsotg_ep *hs_ep = our_ep(ep);
 	struct dwc2_hsotg *hsotg = hs_ep->parent;
@@ -1839,7 +1941,7 @@ static void dwc2_hsotg_enqueue_setup(struct dwc2_hsotg *hsotg)
 }
 
 static void dwc2_hsotg_program_zlp(struct dwc2_hsotg *hsotg,
-					struct dwc2_hsotg_ep *hs_ep)
+				   struct dwc2_hsotg_ep *hs_ep)
 {
 	u32 ctrl;
 	u8 index = hs_ep->index;
@@ -1885,11 +1987,10 @@ static void dwc2_hsotg_program_zlp(struct dwc2_hsotg *hsotg,
  * Note, expects the ep to already be locked as appropriate.
  */
 static void dwc2_hsotg_complete_request(struct dwc2_hsotg *hsotg,
-				       struct dwc2_hsotg_ep *hs_ep,
+					struct dwc2_hsotg_ep *hs_ep,
 				       struct dwc2_hsotg_req *hs_req,
 				       int result)
 {
-
 	if (!hs_req) {
 		dev_dbg(hsotg->dev, "%s: nothing to complete?\n", __func__);
 		return;
@@ -1935,9 +2036,8 @@ static void dwc2_hsotg_complete_request(struct dwc2_hsotg *hsotg,
 	 * so be careful when doing this.
 	 */
 
-	if (!hs_ep->req && result >= 0) {
+	if (!hs_ep->req && result >= 0)
 		dwc2_gadget_start_next_request(hs_ep);
-	}
 }
 
 /*
@@ -2068,13 +2168,12 @@ static void dwc2_hsotg_rx_data(struct dwc2_hsotg *hsotg, int ep_idx, int size)
 	int max_req;
 	int read_ptr;
 
-
 	if (!hs_req) {
 		u32 epctl = dwc2_readl(hsotg->regs + DOEPCTL(ep_idx));
 		int ptr;
 
 		dev_dbg(hsotg->dev,
-			 "%s: FIFO %d bytes on ep%d but no req (DXEPCTl=0x%08x)\n",
+			"%s: FIFO %d bytes on ep%d but no req (DXEPCTl=0x%08x)\n",
 			 __func__, size, ep_idx, epctl);
 
 		/* dump the data from the FIFO, we've nothing we can do */
@@ -2134,7 +2233,7 @@ static void dwc2_hsotg_ep0_zlp(struct dwc2_hsotg *hsotg, bool dir_in)
 }
 
 static void dwc2_hsotg_change_ep_iso_parity(struct dwc2_hsotg *hsotg,
-			u32 epctl_reg)
+					    u32 epctl_reg)
 {
 	u32 ctrl;
 
@@ -2191,7 +2290,7 @@ static void dwc2_hsotg_handle_outdone(struct dwc2_hsotg *hsotg, int epnum)
 	struct dwc2_hsotg_ep *hs_ep = hsotg->eps_out[epnum];
 	struct dwc2_hsotg_req *hs_req = hs_ep->req;
 	struct usb_request *req = &hs_req->req;
-	unsigned size_left = DXEPTSIZ_XFERSIZE_GET(epsize);
+	unsigned int size_left = DXEPTSIZ_XFERSIZE_GET(epsize);
 	int result = 0;
 
 	if (!hs_req) {
@@ -2210,7 +2309,7 @@ static void dwc2_hsotg_handle_outdone(struct dwc2_hsotg *hsotg, int epnum)
 		size_left = dwc2_gadget_get_xfersize_ddma(hs_ep);
 
 	if (using_dma(hsotg)) {
-		unsigned size_done;
+		unsigned int size_done;
 
 		/*
 		 * Calculate the size of the transfer by checking how much
@@ -2295,7 +2394,7 @@ static void dwc2_hsotg_handle_rx(struct dwc2_hsotg *hsotg)
 	size >>= GRXSTS_BYTECNT_SHIFT;
 
 	dev_dbg(hsotg->dev, "%s: GRXSTSP=0x%08x (%d@%d)\n",
-			__func__, grxstsr, size, epnum);
+		__func__, grxstsr, size, epnum);
 
 	switch ((status & GRXSTS_PKTSTS_MASK) >> GRXSTS_PKTSTS_SHIFT) {
 	case GRXSTS_PKTSTS_GLOBALOUTNAK:
@@ -2470,7 +2569,7 @@ static void dwc2_hsotg_txfifo_flush(struct dwc2_hsotg *hsotg, unsigned int idx)
  * make an attempt to write data into the FIFO.
  */
 static int dwc2_hsotg_trytx(struct dwc2_hsotg *hsotg,
-			   struct dwc2_hsotg_ep *hs_ep)
+			    struct dwc2_hsotg_ep *hs_ep)
 {
 	struct dwc2_hsotg_req *hs_req = hs_ep->req;
 
@@ -2481,7 +2580,7 @@ static int dwc2_hsotg_trytx(struct dwc2_hsotg *hsotg,
 		 */
 		if (hs_ep->index != 0)
 			dwc2_hsotg_ctrl_epint(hsotg, hs_ep->index,
-					     hs_ep->dir_in, 0);
+					      hs_ep->dir_in, 0);
 		return 0;
 	}
 
@@ -2503,7 +2602,7 @@ static int dwc2_hsotg_trytx(struct dwc2_hsotg *hsotg,
  * call the relevant completion routines.
  */
 static void dwc2_hsotg_complete_in(struct dwc2_hsotg *hsotg,
-				  struct dwc2_hsotg_ep *hs_ep)
+				   struct dwc2_hsotg_ep *hs_ep)
 {
 	struct dwc2_hsotg_req *hs_req = hs_ep->req;
 	u32 epsize = dwc2_readl(hsotg->regs + DIEPTSIZ(hs_ep->index));
@@ -2531,7 +2630,7 @@ static void dwc2_hsotg_complete_in(struct dwc2_hsotg *hsotg,
 			ret = dwc2_hsotg_set_test_mode(hsotg, hsotg->test_mode);
 			if (ret < 0) {
 				dev_dbg(hsotg->dev, "Invalid Test #%d\n",
-						hsotg->test_mode);
+					hsotg->test_mode);
 				dwc2_hsotg_stall_ep0(hsotg);
 				return;
 			}
@@ -2751,19 +2850,19 @@ static void dwc2_gadget_handle_out_token_ep_disabled(struct dwc2_hsotg_ep *ep)
 }
 
 /**
-* dwc2_gadget_handle_nak - handle NAK interrupt
-* @hs_ep: The endpoint on which interrupt is asserted.
-*
-* This is starting point for ISOC-IN transfer, synchronization done with
-* first IN token received from host while corresponding EP is disabled.
-*
-* Device does not know when first one token will arrive from host. On first
-* token arrival HW generates 2 interrupts: 'in token received while FIFO empty'
-* and 'NAK'. NAK interrupt for ISOC-IN means that token has arrived and ZLP was
-* sent in response to that as there was no data in FIFO. SW is basing on this
-* interrupt to obtain frame in which token has come and then based on the
-* interval calculates next frame for transfer.
-*/
+ * dwc2_gadget_handle_nak - handle NAK interrupt
+ * @hs_ep: The endpoint on which interrupt is asserted.
+ *
+ * This is starting point for ISOC-IN transfer, synchronization done with
+ * first IN token received from host while corresponding EP is disabled.
+ *
+ * Device does not know when first one token will arrive from host. On first
+ * token arrival HW generates 2 interrupts: 'in token received while FIFO empty'
+ * and 'NAK'. NAK interrupt for ISOC-IN means that token has arrived and ZLP was
+ * sent in response to that as there was no data in FIFO. SW is basing on this
+ * interrupt to obtain frame in which token has come and then based on the
+ * interval calculates next frame for transfer.
+ */
 static void dwc2_gadget_handle_nak(struct dwc2_hsotg_ep *hs_ep)
 {
 	struct dwc2_hsotg *hsotg = hs_ep->parent;
@@ -2807,7 +2906,7 @@ static void dwc2_gadget_handle_nak(struct dwc2_hsotg_ep *hs_ep)
  * Process and clear any interrupt pending for an individual endpoint
  */
 static void dwc2_hsotg_epint(struct dwc2_hsotg *hsotg, unsigned int idx,
-			    int dir_in)
+			     int dir_in)
 {
 	struct dwc2_hsotg_ep *hs_ep = index_to_ep(hsotg, idx, dir_in);
 	u32 epint_reg = dir_in ? DIEPINT(idx) : DOEPINT(idx);
@@ -2824,7 +2923,7 @@ static void dwc2_hsotg_epint(struct dwc2_hsotg *hsotg, unsigned int idx,
 
 	if (!hs_ep) {
 		dev_err(hsotg->dev, "%s:Interrupt for unconfigured ep%d(%s)\n",
-					__func__, idx, dir_in ? "in" : "out");
+			__func__, idx, dir_in ? "in" : "out");
 		return;
 	}
 
@@ -3059,13 +3158,13 @@ static void kill_all_requests(struct dwc2_hsotg *hsotg,
 			      int result)
 {
 	struct dwc2_hsotg_req *req, *treq;
-	unsigned size;
+	unsigned int size;
 
 	ep->req = NULL;
 
 	list_for_each_entry_safe(req, treq, &ep->queue, queue)
 		dwc2_hsotg_complete_request(hsotg, ep, req,
-					   result);
+					    result);
 
 	if (!hsotg->dedicated_fifos)
 		return;
@@ -3084,7 +3183,7 @@ static void kill_all_requests(struct dwc2_hsotg *hsotg,
  */
 void dwc2_hsotg_disconnect(struct dwc2_hsotg *hsotg)
 {
-	unsigned ep;
+	unsigned int ep;
 
 	if (!hsotg->connected)
 		return;
@@ -3095,10 +3194,10 @@ void dwc2_hsotg_disconnect(struct dwc2_hsotg *hsotg)
 	for (ep = 0; ep < hsotg->num_of_eps; ep++) {
 		if (hsotg->eps_in[ep])
 			kill_all_requests(hsotg, hsotg->eps_in[ep],
-								-ESHUTDOWN);
+					  -ESHUTDOWN);
 		if (hsotg->eps_out[ep])
 			kill_all_requests(hsotg, hsotg->eps_out[ep],
-								-ESHUTDOWN);
+					  -ESHUTDOWN);
 	}
 
 	call_gadget(hsotg, disconnect);
@@ -3147,7 +3246,7 @@ static void dwc2_hsotg_irq_fifoempty(struct dwc2_hsotg *hsotg, bool periodic)
  * Issue a soft reset to the core, and await the core finishing it.
  */
 void dwc2_hsotg_core_init_disconnected(struct dwc2_hsotg *hsotg,
-						bool is_usb_reset)
+				       bool is_usb_reset)
 {
 	u32 intmsk;
 	u32 val;
@@ -3158,7 +3257,7 @@ void dwc2_hsotg_core_init_disconnected(struct dwc2_hsotg *hsotg,
 	kill_all_requests(hsotg, hsotg->eps_out[0], -ECONNRESET);
 
 	if (!is_usb_reset)
-		if (dwc2_core_reset(hsotg))
+		if (dwc2_core_reset(hsotg, true))
 			return;
 
 	/*
@@ -3221,7 +3320,7 @@ void dwc2_hsotg_core_init_disconnected(struct dwc2_hsotg *hsotg,
 	if (!using_desc_dma(hsotg))
 		intmsk |= GINTSTS_INCOMPL_SOIN | GINTSTS_INCOMPL_SOOUT;
 
-	if (hsotg->params.external_id_pin_ctl <= 0)
+	if (!hsotg->params.external_id_pin_ctl)
 		intmsk |= GINTSTS_CONIDSTSCHNG;
 
 	dwc2_writel(intmsk, hsotg->regs + GINTMSK);
@@ -3462,7 +3561,6 @@ irq_retry:
 	}
 
 	if (gintsts & (GINTSTS_USBRST | GINTSTS_RESETDET)) {
-
 		u32 usb_status = dwc2_readl(hsotg->regs + GOTGCTL);
 		u32 connected = hsotg->connected;
 
@@ -3601,7 +3699,7 @@ irq_retry:
 	 */
 
 	if (gintsts & IRQ_RETRY_MASK && --retry_count > 0)
-			goto irq_retry;
+		goto irq_retry;
 
 	spin_unlock(&hsotg->lock);
 
@@ -3705,7 +3803,7 @@ static void dwc2_hsotg_ep_stop_xfr(struct dwc2_hsotg *hsotg,
  * This is called from the USB gadget code's usb_ep_enable().
  */
 static int dwc2_hsotg_ep_enable(struct usb_ep *ep,
-			       const struct usb_endpoint_descriptor *desc)
+				const struct usb_endpoint_descriptor *desc)
 {
 	struct dwc2_hsotg_ep *hs_ep = our_ep(ep);
 	struct dwc2_hsotg *hsotg = hs_ep->parent;
@@ -3827,12 +3925,13 @@ static int dwc2_hsotg_ep_enable(struct usb_ep *ep,
 	if (dir_in && hsotg->dedicated_fifos) {
 		u32 fifo_index = 0;
 		u32 fifo_size = UINT_MAX;
-		size = hs_ep->ep.maxpacket*hs_ep->mc;
+
+		size = hs_ep->ep.maxpacket * hs_ep->mc;
 		for (i = 1; i < hsotg->num_of_eps; ++i) {
-			if (hsotg->fifo_map & (1<<i))
+			if (hsotg->fifo_map & (1 << i))
 				continue;
 			val = dwc2_readl(hsotg->regs + DPTXFSIZN(i));
-			val = (val >> FIFOSIZE_DEPTH_SHIFT)*4;
+			val = (val >> FIFOSIZE_DEPTH_SHIFT) * 4;
 			if (val < size)
 				continue;
 			/* Search for smallest acceptable fifo */
@@ -4033,23 +4132,22 @@ static int dwc2_hsotg_ep_sethalt(struct usb_ep *ep, int value, bool now)
 			epctl &= ~DXEPCTL_STALL;
 			xfertype = epctl & DXEPCTL_EPTYPE_MASK;
 			if (xfertype == DXEPCTL_EPTYPE_BULK ||
-				xfertype == DXEPCTL_EPTYPE_INTERRUPT)
-					epctl |= DXEPCTL_SETD0PID;
+			    xfertype == DXEPCTL_EPTYPE_INTERRUPT)
+				epctl |= DXEPCTL_SETD0PID;
 		}
 		dwc2_writel(epctl, hs->regs + epreg);
 	} else {
-
 		epreg = DOEPCTL(index);
 		epctl = dwc2_readl(hs->regs + epreg);
 
-		if (value)
+		if (value) {
 			epctl |= DXEPCTL_STALL;
-		else {
+		} else {
 			epctl &= ~DXEPCTL_STALL;
 			xfertype = epctl & DXEPCTL_EPTYPE_MASK;
 			if (xfertype == DXEPCTL_EPTYPE_BULK ||
-				xfertype == DXEPCTL_EPTYPE_INTERRUPT)
-					epctl |= DXEPCTL_SETD0PID;
+			    xfertype == DXEPCTL_EPTYPE_INTERRUPT)
+				epctl |= DXEPCTL_SETD0PID;
 		}
 		dwc2_writel(epctl, hs->regs + epreg);
 	}
@@ -4090,7 +4188,7 @@ static struct usb_ep_ops dwc2_hsotg_ep_ops = {
 };
 
 /**
- * dwc2_hsotg_init - initalize the usb core
+ * dwc2_hsotg_init - initialize the usb core
  * @hsotg: The driver state
  */
 static void dwc2_hsotg_init(struct dwc2_hsotg *hsotg)
@@ -4144,7 +4242,7 @@ static void dwc2_hsotg_init(struct dwc2_hsotg *hsotg)
  * to work.
  */
 static int dwc2_hsotg_udc_start(struct usb_gadget *gadget,
-			   struct usb_gadget_driver *driver)
+				struct usb_gadget_driver *driver)
 {
 	struct dwc2_hsotg *hsotg = to_hsotg(gadget);
 	unsigned long flags;
@@ -4267,7 +4365,7 @@ static int dwc2_hsotg_pullup(struct usb_gadget *gadget, int is_on)
 	unsigned long flags = 0;
 
 	dev_dbg(hsotg->dev, "%s: is_on: %d op_state: %d\n", __func__, is_on,
-			hsotg->op_state);
+		hsotg->op_state);
 
 	/* Don't modify pullup state while in host mode */
 	if (hsotg->op_state != OTG_STATE_B_PERIPHERAL) {
@@ -4329,7 +4427,7 @@ static int dwc2_hsotg_vbus_session(struct usb_gadget *gadget, int is_active)
  *
  * Report how much power the device may consume to the phy.
  */
-static int dwc2_hsotg_vbus_draw(struct usb_gadget *gadget, unsigned mA)
+static int dwc2_hsotg_vbus_draw(struct usb_gadget *gadget, unsigned int mA)
 {
 	struct dwc2_hsotg *hsotg = to_hsotg(gadget);
 
@@ -4358,7 +4456,7 @@ static const struct usb_gadget_ops dwc2_hsotg_gadget_ops = {
  * direction information and other state that may be required.
  */
 static void dwc2_hsotg_initep(struct dwc2_hsotg *hsotg,
-				       struct dwc2_hsotg_ep *hs_ep,
+			      struct dwc2_hsotg_ep *hs_ep,
 				       int epnum,
 				       bool dir_in)
 {
@@ -4415,6 +4513,7 @@ static void dwc2_hsotg_initep(struct dwc2_hsotg *hsotg,
 
 	if (using_dma(hsotg)) {
 		u32 next = DXEPCTL_NEXTEP((epnum + 1) % 15);
+
 		if (dir_in)
 			dwc2_writel(next, hsotg->regs + DIEPCTL(epnum));
 		else
@@ -4441,8 +4540,9 @@ static int dwc2_hsotg_hw_cfg(struct dwc2_hsotg *hsotg)
 	/* Add ep0 */
 	hsotg->num_of_eps++;
 
-	hsotg->eps_in[0] = devm_kzalloc(hsotg->dev, sizeof(struct dwc2_hsotg_ep),
-								GFP_KERNEL);
+	hsotg->eps_in[0] = devm_kzalloc(hsotg->dev,
+					sizeof(struct dwc2_hsotg_ep),
+					GFP_KERNEL);
 	if (!hsotg->eps_in[0])
 		return -ENOMEM;
 	/* Same dwc2_hsotg_ep is used in both directions for ep0 */
@@ -4521,7 +4621,6 @@ static void dwc2_hsotg_dump(struct dwc2_hsotg *hsotg)
 			 idx, dwc2_readl(regs + DOEPCTL(idx)),
 			 dwc2_readl(regs + DOEPTSIZ(idx)),
 			 dwc2_readl(regs + DOEPDMA(idx)));
-
 	}
 
 	dev_info(dev, "DVBUSDIS=0x%08x, DVBUSPULSE=%08x\n",
@@ -4576,7 +4675,7 @@ int dwc2_gadget_init(struct dwc2_hsotg *hsotg, int irq)
 	}
 
 	ret = devm_request_irq(hsotg->dev, irq, dwc2_hsotg_irq, IRQF_SHARED,
-				dev_name(hsotg->dev), hsotg);
+			       dev_name(hsotg->dev), hsotg);
 	if (ret < 0) {
 		dev_err(dev, "cannot claim IRQ for gadget\n");
 		return ret;
@@ -4607,10 +4706,10 @@ int dwc2_gadget_init(struct dwc2_hsotg *hsotg, int irq)
 	for (epnum = 0; epnum < hsotg->num_of_eps; epnum++) {
 		if (hsotg->eps_in[epnum])
 			dwc2_hsotg_initep(hsotg, hsotg->eps_in[epnum],
-								epnum, 1);
+					  epnum, 1);
 		if (hsotg->eps_out[epnum])
 			dwc2_hsotg_initep(hsotg, hsotg->eps_out[epnum],
-								epnum, 0);
+					  epnum, 0);
 	}
 
 	ret = usb_add_gadget_udc(dev, &hsotg->gadget);
diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c
index 46d0ad5105e4..a73722e27d07 100644
--- a/drivers/usb/dwc2/hcd.c
+++ b/drivers/usb/dwc2/hcd.c
@@ -42,6 +42,7 @@
 #include <linux/module.h>
 #include <linux/spinlock.h>
 #include <linux/interrupt.h>
+#include <linux/platform_device.h>
 #include <linux/dma-mapping.h>
 #include <linux/delay.h>
 #include <linux/io.h>
@@ -54,6 +55,8 @@
 #include "core.h"
 #include "hcd.h"
 
+static void dwc2_port_resume(struct dwc2_hsotg *hsotg);
+
 /*
  * =========================================================================
  *  Host Core Layer Functions
@@ -79,9 +82,9 @@ static void dwc2_enable_common_interrupts(struct dwc2_hsotg *hsotg)
 	/* Enable the interrupts in the GINTMSK */
 	intmsk = GINTSTS_MODEMIS | GINTSTS_OTGINT;
 
-	if (hsotg->params.host_dma <= 0)
+	if (!hsotg->params.host_dma)
 		intmsk |= GINTSTS_RXFLVL;
-	if (hsotg->params.external_id_pin_ctl <= 0)
+	if (!hsotg->params.external_id_pin_ctl)
 		intmsk |= GINTSTS_CONIDSTSCHNG;
 
 	intmsk |= GINTSTS_WKUPINT | GINTSTS_USBSUSP |
@@ -100,7 +103,7 @@ static void dwc2_init_fs_ls_pclk_sel(struct dwc2_hsotg *hsotg)
 
 	if ((hsotg->hw_params.hs_phy_type == GHWCFG2_HS_PHY_TYPE_ULPI &&
 	     hsotg->hw_params.fs_phy_type == GHWCFG2_FS_PHY_TYPE_DEDICATED &&
-	     hsotg->params.ulpi_fs_ls > 0) ||
+	     hsotg->params.ulpi_fs_ls) ||
 	    hsotg->params.phy_type == DWC2_PHY_TYPE_PARAM_FS) {
 		/* Full speed PHY */
 		val = HCFG_FSLSPCLKSEL_48_MHZ;
@@ -152,7 +155,7 @@ static int dwc2_fs_phy_init(struct dwc2_hsotg *hsotg, bool select_phy)
 	if (dwc2_is_host_mode(hsotg))
 		dwc2_init_fs_ls_pclk_sel(hsotg);
 
-	if (hsotg->params.i2c_enable > 0) {
+	if (hsotg->params.i2c_enable) {
 		dev_dbg(hsotg->dev, "FS PHY enabling I2C\n");
 
 		/* Program GUSBCFG.OtgUtmiFsSel to I2C */
@@ -195,7 +198,7 @@ static int dwc2_hs_phy_init(struct dwc2_hsotg *hsotg, bool select_phy)
 		dev_dbg(hsotg->dev, "HS ULPI PHY selected\n");
 		usbcfg |= GUSBCFG_ULPI_UTMI_SEL;
 		usbcfg &= ~(GUSBCFG_PHYIF16 | GUSBCFG_DDRSEL);
-		if (hsotg->params.phy_ulpi_ddr > 0)
+		if (hsotg->params.phy_ulpi_ddr)
 			usbcfg |= GUSBCFG_DDRSEL;
 		break;
 	case DWC2_PHY_TYPE_PARAM_UTMI:
@@ -246,7 +249,7 @@ static int dwc2_phy_init(struct dwc2_hsotg *hsotg, bool select_phy)
 
 	if (hsotg->hw_params.hs_phy_type == GHWCFG2_HS_PHY_TYPE_ULPI &&
 	    hsotg->hw_params.fs_phy_type == GHWCFG2_FS_PHY_TYPE_DEDICATED &&
-	    hsotg->params.ulpi_fs_ls > 0) {
+	    hsotg->params.ulpi_fs_ls) {
 		dev_dbg(hsotg->dev, "Setting ULPI FSLS\n");
 		usbcfg = dwc2_readl(hsotg->regs + GUSBCFG);
 		usbcfg |= GUSBCFG_ULPI_FS_LS;
@@ -290,17 +293,17 @@ static int dwc2_gahbcfg_init(struct dwc2_hsotg *hsotg)
 		hsotg->params.host_dma,
 		hsotg->params.dma_desc_enable);
 
-	if (hsotg->params.host_dma > 0) {
-		if (hsotg->params.dma_desc_enable > 0)
+	if (hsotg->params.host_dma) {
+		if (hsotg->params.dma_desc_enable)
 			dev_dbg(hsotg->dev, "Using Descriptor DMA mode\n");
 		else
 			dev_dbg(hsotg->dev, "Using Buffer DMA mode\n");
 	} else {
 		dev_dbg(hsotg->dev, "Using Slave mode\n");
-		hsotg->params.dma_desc_enable = 0;
+		hsotg->params.dma_desc_enable = false;
 	}
 
-	if (hsotg->params.host_dma > 0)
+	if (hsotg->params.host_dma)
 		ahbcfg |= GAHBCFG_DMA_EN;
 
 	dwc2_writel(ahbcfg, hsotg->regs + GAHBCFG);
@@ -491,9 +494,10 @@ static void dwc2_config_fifos(struct dwc2_hsotg *hsotg)
 	dev_dbg(hsotg->dev, "new hptxfsiz=%08x\n",
 		dwc2_readl(hsotg->regs + HPTXFSIZ));
 
-	if (hsotg->params.en_multiple_tx_fifo > 0 &&
-	    hsotg->hw_params.snpsid <= DWC2_CORE_REV_2_94a) {
+	if (hsotg->params.en_multiple_tx_fifo &&
+	    hsotg->hw_params.snpsid >= DWC2_CORE_REV_2_91a) {
 		/*
+		 * This feature was implemented in 2.91a version
 		 * Global DFIFOCFG calculation for Host mode -
 		 * include RxFIFO, NPTXFIFO and HPTXFIFO
 		 */
@@ -771,7 +775,7 @@ static void dwc2_hc_enable_dma_ints(struct dwc2_hsotg *hsotg,
 	 * For Descriptor DMA mode core halts the channel on AHB error.
 	 * Interrupt is not required.
 	 */
-	if (hsotg->params.dma_desc_enable <= 0) {
+	if (!hsotg->params.dma_desc_enable) {
 		if (dbg_hc(chan))
 			dev_vdbg(hsotg->dev, "desc DMA disabled\n");
 		hcintmsk |= HCINTMSK_AHBERR;
@@ -804,7 +808,7 @@ static void dwc2_hc_enable_ints(struct dwc2_hsotg *hsotg,
 {
 	u32 intmsk;
 
-	if (hsotg->params.host_dma > 0) {
+	if (hsotg->params.host_dma) {
 		if (dbg_hc(chan))
 			dev_vdbg(hsotg->dev, "DMA enabled\n");
 		dwc2_hc_enable_dma_ints(hsotg, chan);
@@ -1024,7 +1028,7 @@ void dwc2_hc_halt(struct dwc2_hsotg *hsotg, struct dwc2_host_chan *chan,
 
 	/* No need to set the bit in DDMA for disabling the channel */
 	/* TODO check it everywhere channel is disabled */
-	if (hsotg->params.dma_desc_enable <= 0) {
+	if (!hsotg->params.dma_desc_enable) {
 		if (dbg_hc(chan))
 			dev_vdbg(hsotg->dev, "desc DMA disabled\n");
 		hcchar |= HCCHAR_CHENA;
@@ -1034,7 +1038,7 @@ void dwc2_hc_halt(struct dwc2_hsotg *hsotg, struct dwc2_host_chan *chan,
 	}
 	hcchar |= HCCHAR_CHDIS;
 
-	if (hsotg->params.host_dma <= 0) {
+	if (!hsotg->params.host_dma) {
 		if (dbg_hc(chan))
 			dev_vdbg(hsotg->dev, "DMA not enabled\n");
 		hcchar |= HCCHAR_CHENA;
@@ -1380,7 +1384,7 @@ static void dwc2_hc_start_transfer(struct dwc2_hsotg *hsotg,
 		dev_vdbg(hsotg->dev, "%s()\n", __func__);
 
 	if (chan->do_ping) {
-		if (hsotg->params.host_dma <= 0) {
+		if (!hsotg->params.host_dma) {
 			if (dbg_hc(chan))
 				dev_vdbg(hsotg->dev, "ping, no DMA\n");
 			dwc2_hc_do_ping(hsotg, chan);
@@ -1508,7 +1512,7 @@ static void dwc2_hc_start_transfer(struct dwc2_hsotg *hsotg,
 			 TSIZ_SC_MC_PID_SHIFT);
 	}
 
-	if (hsotg->params.host_dma > 0) {
+	if (hsotg->params.host_dma) {
 		dwc2_writel((u32)chan->xfer_dma,
 			    hsotg->regs + HCDMA(chan->hc_num));
 		if (dbg_hc(chan))
@@ -1551,7 +1555,7 @@ static void dwc2_hc_start_transfer(struct dwc2_hsotg *hsotg,
 	chan->xfer_started = 1;
 	chan->requests++;
 
-	if (hsotg->params.host_dma <= 0 &&
+	if (!hsotg->params.host_dma &&
 	    !chan->ep_is_in && chan->xfer_len > 0)
 		/* Load OUT packet into the appropriate Tx FIFO */
 		dwc2_hc_write_packet(hsotg, chan);
@@ -1834,7 +1838,7 @@ static void dwc2_hcd_cleanup_channels(struct dwc2_hsotg *hsotg)
 	u32 hcchar;
 	int i;
 
-	if (hsotg->params.host_dma <= 0) {
+	if (!hsotg->params.host_dma) {
 		/* Flush out any channel requests in slave mode */
 		for (i = 0; i < num_channels; i++) {
 			channel = hsotg->hc_ptr_array[i];
@@ -1870,7 +1874,7 @@ static void dwc2_hcd_cleanup_channels(struct dwc2_hsotg *hsotg)
 		channel->qh = NULL;
 	}
 	/* All channels have been freed, mark them available */
-	if (hsotg->params.uframe_sched > 0) {
+	if (hsotg->params.uframe_sched) {
 		hsotg->available_host_channels =
 			hsotg->params.host_channels;
 	} else {
@@ -2107,7 +2111,7 @@ static int dwc2_hcd_urb_dequeue(struct dwc2_hsotg *hsotg,
 	 * Free the QTD and clean up the associated QH. Leave the QH in the
 	 * schedule if it has any remaining QTDs.
 	 */
-	if (hsotg->params.dma_desc_enable <= 0) {
+	if (!hsotg->params.dma_desc_enable) {
 		u8 in_process = urb_qtd->in_process;
 
 		dwc2_hcd_qtd_unlink_and_free(hsotg, urb_qtd, qh);
@@ -2150,7 +2154,7 @@ static int dwc2_hcd_endpoint_disable(struct dwc2_hsotg *hsotg,
 		}
 
 		spin_unlock_irqrestore(&hsotg->lock, flags);
-		usleep_range(20000, 40000);
+		msleep(20);
 		spin_lock_irqsave(&hsotg->lock, flags);
 		qh = ep->hcpriv;
 		if (!qh) {
@@ -2215,13 +2219,12 @@ static int dwc2_core_init(struct dwc2_hsotg *hsotg, bool initial_setup)
 
 	/* Set ULPI External VBUS bit if needed */
 	usbcfg &= ~GUSBCFG_ULPI_EXT_VBUS_DRV;
-	if (hsotg->params.phy_ulpi_ext_vbus ==
-				DWC2_PHY_ULPI_EXTERNAL_VBUS)
+	if (hsotg->params.phy_ulpi_ext_vbus)
 		usbcfg |= GUSBCFG_ULPI_EXT_VBUS_DRV;
 
 	/* Set external TS Dline pulsing bit if needed */
 	usbcfg &= ~GUSBCFG_TERMSELDLPULSE;
-	if (hsotg->params.ts_dline > 0)
+	if (hsotg->params.ts_dline)
 		usbcfg |= GUSBCFG_TERMSELDLPULSE;
 
 	dwc2_writel(usbcfg, hsotg->regs + GUSBCFG);
@@ -2260,10 +2263,7 @@ static int dwc2_core_init(struct dwc2_hsotg *hsotg, bool initial_setup)
 	/* Program the GOTGCTL register */
 	otgctl = dwc2_readl(hsotg->regs + GOTGCTL);
 	otgctl &= ~GOTGCTL_OTGVER;
-	if (hsotg->params.otg_ver > 0)
-		otgctl |= GOTGCTL_OTGVER;
 	dwc2_writel(otgctl, hsotg->regs + GOTGCTL);
-	dev_dbg(hsotg->dev, "OTG VER PARAM: %d\n", hsotg->params.otg_ver);
 
 	/* Clear the SRP success bit for FS-I2c */
 	hsotg->srp_success = 0;
@@ -2319,13 +2319,13 @@ static void dwc2_core_host_init(struct dwc2_hsotg *hsotg)
 	 * runtime. This bit needs to be programmed during initial configuration
 	 * and its value must not be changed during runtime.
 	 */
-	if (hsotg->params.reload_ctl > 0) {
+	if (hsotg->params.reload_ctl) {
 		hfir = dwc2_readl(hsotg->regs + HFIR);
 		hfir |= HFIR_RLDCTRL;
 		dwc2_writel(hfir, hsotg->regs + HFIR);
 	}
 
-	if (hsotg->params.dma_desc_enable > 0) {
+	if (hsotg->params.dma_desc_enable) {
 		u32 op_mode = hsotg->hw_params.op_mode;
 
 		if (hsotg->hw_params.snpsid < DWC2_CORE_REV_2_90a ||
@@ -2337,7 +2337,7 @@ static void dwc2_core_host_init(struct dwc2_hsotg *hsotg)
 				"Hardware does not support descriptor DMA mode -\n");
 			dev_err(hsotg->dev,
 				"falling back to buffer DMA mode.\n");
-			hsotg->params.dma_desc_enable = 0;
+			hsotg->params.dma_desc_enable = false;
 		} else {
 			hcfg = dwc2_readl(hsotg->regs + HCFG);
 			hcfg |= HCFG_DESCDMA;
@@ -2363,7 +2363,7 @@ static void dwc2_core_host_init(struct dwc2_hsotg *hsotg)
 	otgctl &= ~GOTGCTL_HSTSETHNPEN;
 	dwc2_writel(otgctl, hsotg->regs + GOTGCTL);
 
-	if (hsotg->params.dma_desc_enable <= 0) {
+	if (!hsotg->params.dma_desc_enable) {
 		int num_channels, i;
 		u32 hcchar;
 
@@ -2430,7 +2430,7 @@ static void dwc2_hcd_reinit(struct dwc2_hsotg *hsotg)
 	hsotg->flags.d32 = 0;
 	hsotg->non_periodic_qh_ptr = &hsotg->non_periodic_sched_active;
 
-	if (hsotg->params.uframe_sched > 0) {
+	if (hsotg->params.uframe_sched) {
 		hsotg->available_host_channels =
 			hsotg->params.host_channels;
 	} else {
@@ -2488,7 +2488,7 @@ static void dwc2_hc_init_xfer(struct dwc2_hsotg *hsotg,
 			chan->do_ping = 0;
 			chan->ep_is_in = 0;
 			chan->data_pid_start = DWC2_HC_PID_SETUP;
-			if (hsotg->params.host_dma > 0)
+			if (hsotg->params.host_dma)
 				chan->xfer_dma = urb->setup_dma;
 			else
 				chan->xfer_buf = urb->setup_packet;
@@ -2515,7 +2515,7 @@ static void dwc2_hc_init_xfer(struct dwc2_hsotg *hsotg,
 				chan->do_ping = 0;
 			chan->data_pid_start = DWC2_HC_PID_DATA1;
 			chan->xfer_len = 0;
-			if (hsotg->params.host_dma > 0)
+			if (hsotg->params.host_dma)
 				chan->xfer_dma = hsotg->status_buf_dma;
 			else
 				chan->xfer_buf = hsotg->status_buf;
@@ -2533,13 +2533,13 @@ static void dwc2_hc_init_xfer(struct dwc2_hsotg *hsotg,
 
 	case USB_ENDPOINT_XFER_ISOC:
 		chan->ep_type = USB_ENDPOINT_XFER_ISOC;
-		if (hsotg->params.dma_desc_enable > 0)
+		if (hsotg->params.dma_desc_enable)
 			break;
 
 		frame_desc = &urb->iso_descs[qtd->isoc_frame_index];
 		frame_desc->status = 0;
 
-		if (hsotg->params.host_dma > 0) {
+		if (hsotg->params.host_dma) {
 			chan->xfer_dma = urb->dma;
 			chan->xfer_dma += frame_desc->offset +
 					qtd->isoc_split_offset;
@@ -2577,7 +2577,7 @@ static void dwc2_free_dma_aligned_buffer(struct urb *urb)
 		return;
 
 	temp = container_of(urb->transfer_buffer,
-		struct dma_aligned_buffer, data);
+			    struct dma_aligned_buffer, data);
 
 	if (usb_urb_dir_in(urb))
 		memcpy(temp->old_xfer_buffer, temp->data,
@@ -2621,7 +2621,7 @@ static int dwc2_alloc_dma_aligned_buffer(struct urb *urb, gfp_t mem_flags)
 }
 
 static int dwc2_map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb,
-				      gfp_t mem_flags)
+				gfp_t mem_flags)
 {
 	int ret;
 
@@ -2718,10 +2718,10 @@ static int dwc2_assign_and_init_hc(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh)
 	chan->multi_count = 1;
 
 	if (urb->actual_length > urb->length &&
-		!dwc2_hcd_is_pipe_in(&urb->pipe_info))
+	    !dwc2_hcd_is_pipe_in(&urb->pipe_info))
 		urb->actual_length = urb->length;
 
-	if (hsotg->params.host_dma > 0)
+	if (hsotg->params.host_dma)
 		chan->xfer_dma = urb->dma + urb->actual_length;
 	else
 		chan->xfer_buf = (u8 *)urb->buf + urb->actual_length;
@@ -2746,7 +2746,7 @@ static int dwc2_assign_and_init_hc(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh)
 		 */
 		chan->multi_count = dwc2_hb_mult(qh->maxp);
 
-	if (hsotg->params.dma_desc_enable > 0) {
+	if (hsotg->params.dma_desc_enable) {
 		chan->desc_list_addr = qh->desc_list_dma;
 		chan->desc_list_sz = qh->desc_list_sz;
 	}
@@ -2783,7 +2783,7 @@ enum dwc2_transaction_type dwc2_hcd_select_transactions(
 	while (qh_ptr != &hsotg->periodic_sched_ready) {
 		if (list_empty(&hsotg->free_hc_list))
 			break;
-		if (hsotg->params.uframe_sched > 0) {
+		if (hsotg->params.uframe_sched) {
 			if (hsotg->available_host_channels <= 1)
 				break;
 			hsotg->available_host_channels--;
@@ -2810,14 +2810,14 @@ enum dwc2_transaction_type dwc2_hcd_select_transactions(
 	num_channels = hsotg->params.host_channels;
 	qh_ptr = hsotg->non_periodic_sched_inactive.next;
 	while (qh_ptr != &hsotg->non_periodic_sched_inactive) {
-		if (hsotg->params.uframe_sched <= 0 &&
+		if (!hsotg->params.uframe_sched &&
 		    hsotg->non_periodic_channels >= num_channels -
 						hsotg->periodic_channels)
 			break;
 		if (list_empty(&hsotg->free_hc_list))
 			break;
 		qh = list_entry(qh_ptr, struct dwc2_qh, qh_list_entry);
-		if (hsotg->params.uframe_sched > 0) {
+		if (hsotg->params.uframe_sched) {
 			if (hsotg->available_host_channels < 1)
 				break;
 			hsotg->available_host_channels--;
@@ -2839,7 +2839,7 @@ enum dwc2_transaction_type dwc2_hcd_select_transactions(
 		else
 			ret_val = DWC2_TRANSACTION_ALL;
 
-		if (hsotg->params.uframe_sched <= 0)
+		if (!hsotg->params.uframe_sched)
 			hsotg->non_periodic_channels++;
 	}
 
@@ -2878,8 +2878,8 @@ static int dwc2_queue_transaction(struct dwc2_hsotg *hsotg,
 		list_move_tail(&chan->split_order_list_entry,
 			       &hsotg->split_order);
 
-	if (hsotg->params.host_dma > 0) {
-		if (hsotg->params.dma_desc_enable > 0) {
+	if (hsotg->params.host_dma) {
+		if (hsotg->params.dma_desc_enable) {
 			if (!chan->xfer_started ||
 			    chan->ep_type == USB_ENDPOINT_XFER_ISOC) {
 				dwc2_hcd_start_xfer_ddma(hsotg, chan->qh);
@@ -2967,7 +2967,7 @@ static void dwc2_process_periodic_channels(struct dwc2_hsotg *hsotg)
 		qspcavail = (tx_status & TXSTS_QSPCAVAIL_MASK) >>
 			    TXSTS_QSPCAVAIL_SHIFT;
 		if (qspcavail == 0) {
-			no_queue_space = 1;
+			no_queue_space = true;
 			break;
 		}
 
@@ -2988,15 +2988,15 @@ static void dwc2_process_periodic_channels(struct dwc2_hsotg *hsotg)
 		 * The flag prevents any halts to get into the request queue in
 		 * the middle of multiple high-bandwidth packets getting queued.
 		 */
-		if (hsotg->params.host_dma <= 0 &&
-				qh->channel->multi_count > 1)
+		if (!hsotg->params.host_dma &&
+		    qh->channel->multi_count > 1)
 			hsotg->queuing_high_bandwidth = 1;
 
 		fspcavail = (tx_status & TXSTS_FSPCAVAIL_MASK) >>
 			    TXSTS_FSPCAVAIL_SHIFT;
 		status = dwc2_queue_transaction(hsotg, qh->channel, fspcavail);
 		if (status < 0) {
-			no_fifo_space = 1;
+			no_fifo_space = true;
 			break;
 		}
 
@@ -3007,7 +3007,7 @@ static void dwc2_process_periodic_channels(struct dwc2_hsotg *hsotg)
 		 * controller automatically handles multiple packets for
 		 * high-bandwidth transfers.
 		 */
-		if (hsotg->params.host_dma > 0 || status == 0 ||
+		if (hsotg->params.host_dma || status == 0 ||
 		    qh->channel->requests == qh->channel->multi_count) {
 			qh_ptr = qh_ptr->next;
 			/*
@@ -3024,7 +3024,7 @@ static void dwc2_process_periodic_channels(struct dwc2_hsotg *hsotg)
 
 exit:
 	if (no_queue_space || no_fifo_space ||
-	    (hsotg->params.host_dma <= 0 &&
+	    (!hsotg->params.host_dma &&
 	     !list_empty(&hsotg->periodic_sched_assigned))) {
 		/*
 		 * May need to queue more transactions as the request
@@ -3045,7 +3045,7 @@ exit:
 		 * now. This function is called from interrupt
 		 * handlers to queue more transactions as transfer
 		 * states change.
-		*/
+		 */
 		gintmsk = dwc2_readl(hsotg->regs + GINTMSK);
 		if (gintmsk & GINTSTS_PTXFEMP) {
 			gintmsk &= ~GINTSTS_PTXFEMP;
@@ -3104,7 +3104,7 @@ static void dwc2_process_non_periodic_channels(struct dwc2_hsotg *hsotg)
 		tx_status = dwc2_readl(hsotg->regs + GNPTXSTS);
 		qspcavail = (tx_status & TXSTS_QSPCAVAIL_MASK) >>
 			    TXSTS_QSPCAVAIL_SHIFT;
-		if (hsotg->params.host_dma <= 0 && qspcavail == 0) {
+		if (!hsotg->params.host_dma && qspcavail == 0) {
 			no_queue_space = 1;
 			break;
 		}
@@ -3137,7 +3137,7 @@ next:
 					hsotg->non_periodic_qh_ptr->next;
 	} while (hsotg->non_periodic_qh_ptr != orig_qh_ptr);
 
-	if (hsotg->params.host_dma <= 0) {
+	if (!hsotg->params.host_dma) {
 		tx_status = dwc2_readl(hsotg->regs + GNPTXSTS);
 		qspcavail = (tx_status & TXSTS_QSPCAVAIL_MASK) >>
 			    TXSTS_QSPCAVAIL_SHIFT;
@@ -3235,12 +3235,25 @@ static void dwc2_conn_id_status_change(struct work_struct *work)
 	if (gotgctl & GOTGCTL_CONID_B) {
 		/* Wait for switch to device mode */
 		dev_dbg(hsotg->dev, "connId B\n");
+		if (hsotg->bus_suspended) {
+			dev_info(hsotg->dev,
+				 "Do port resume before switching to device mode\n");
+			dwc2_port_resume(hsotg);
+		}
 		while (!dwc2_is_device_mode(hsotg)) {
 			dev_info(hsotg->dev,
 				 "Waiting for Peripheral Mode, Mode=%s\n",
 				 dwc2_is_host_mode(hsotg) ? "Host" :
 				 "Peripheral");
-			usleep_range(20000, 40000);
+			msleep(20);
+			/*
+			 * Sometimes the initial GOTGCTRL read is wrong, so
+			 * check it again and jump to host mode if that was
+			 * the case.
+			 */
+			gotgctl = dwc2_readl(hsotg->regs + GOTGCTL);
+			if (!(gotgctl & GOTGCTL_CONID_B))
+				goto host;
 			if (++count > 250)
 				break;
 		}
@@ -3255,13 +3268,14 @@ static void dwc2_conn_id_status_change(struct work_struct *work)
 		spin_unlock_irqrestore(&hsotg->lock, flags);
 		dwc2_hsotg_core_connect(hsotg);
 	} else {
+host:
 		/* A-Device connector (Host Mode) */
 		dev_dbg(hsotg->dev, "connId A\n");
 		while (!dwc2_is_host_mode(hsotg)) {
 			dev_info(hsotg->dev, "Waiting for Host Mode, Mode=%s\n",
 				 dwc2_is_host_mode(hsotg) ?
 				 "Host" : "Peripheral");
-			usleep_range(20000, 40000);
+			msleep(20);
 			if (++count > 250)
 				break;
 		}
@@ -3296,7 +3310,7 @@ static void dwc2_wakeup_detected(unsigned long data)
 		dwc2_readl(hsotg->regs + HPRT0));
 
 	dwc2_hcd_rem_wakeup(hsotg);
-	hsotg->bus_suspended = 0;
+	hsotg->bus_suspended = false;
 
 	/* Change to L0 state */
 	hsotg->lx_state = DWC2_L0;
@@ -3332,7 +3346,7 @@ static void dwc2_port_suspend(struct dwc2_hsotg *hsotg, u16 windex)
 	hprt0 |= HPRT0_SUSP;
 	dwc2_writel(hprt0, hsotg->regs + HPRT0);
 
-	hsotg->bus_suspended = 1;
+	hsotg->bus_suspended = true;
 
 	/*
 	 * If hibernation is supported, Phy clock will be suspended
@@ -3354,7 +3368,7 @@ static void dwc2_port_suspend(struct dwc2_hsotg *hsotg, u16 windex)
 
 		spin_unlock_irqrestore(&hsotg->lock, flags);
 
-		usleep_range(200000, 250000);
+		msleep(200);
 	} else {
 		spin_unlock_irqrestore(&hsotg->lock, flags);
 	}
@@ -3378,7 +3392,7 @@ static void dwc2_port_resume(struct dwc2_hsotg *hsotg)
 		pcgctl &= ~PCGCTL_STOPPCLK;
 		dwc2_writel(pcgctl, hsotg->regs + PCGCTL);
 		spin_unlock_irqrestore(&hsotg->lock, flags);
-		usleep_range(20000, 40000);
+		msleep(20);
 		spin_lock_irqsave(&hsotg->lock, flags);
 	}
 
@@ -3394,7 +3408,7 @@ static void dwc2_port_resume(struct dwc2_hsotg *hsotg)
 	hprt0 = dwc2_read_hprt0(hsotg);
 	hprt0 &= ~(HPRT0_RES | HPRT0_SUSP);
 	dwc2_writel(hprt0, hsotg->regs + HPRT0);
-	hsotg->bus_suspended = 0;
+	hsotg->bus_suspended = false;
 	spin_unlock_irqrestore(&hsotg->lock, flags);
 }
 
@@ -3614,7 +3628,7 @@ static int dwc2_hcd_hub_control(struct dwc2_hsotg *hsotg, u16 typereq,
 				u32 hcfg;
 
 				dev_info(hsotg->dev, "Enabling descriptor DMA mode\n");
-				hsotg->params.dma_desc_enable = 1;
+				hsotg->params.dma_desc_enable = true;
 				hcfg = dwc2_readl(hsotg->regs + HCFG);
 				hcfg |= HCFG_DESCDMA;
 				dwc2_writel(hcfg, hsotg->regs + HCFG);
@@ -3691,7 +3705,7 @@ static int dwc2_hcd_hub_control(struct dwc2_hsotg *hsotg, u16 typereq,
 			}
 
 			/* Clear reset bit in 10ms (FS/LS) or 50ms (HS) */
-			usleep_range(50000, 70000);
+			msleep(50);
 			hprt0 &= ~HPRT0_RST;
 			dwc2_writel(hprt0, hsotg->regs + HPRT0);
 			hsotg->lx_state = DWC2_L0; /* Now back to On state */
@@ -4047,7 +4061,7 @@ static struct dwc2_hsotg *dwc2_hcd_to_hsotg(struct usb_hcd *hcd)
 {
 	struct wrapper_priv_data *p;
 
-	p = (struct wrapper_priv_data *) &hcd->hcd_priv;
+	p = (struct wrapper_priv_data *)&hcd->hcd_priv;
 	return p->hsotg;
 }
 
@@ -4082,7 +4096,7 @@ struct dwc2_tt *dwc2_host_get_tt_info(struct dwc2_hsotg *hsotg, void *context,
 		*ttport = urb->dev->ttport;
 
 		dwc_tt = urb->dev->tt->hcpriv;
-		if (dwc_tt == NULL) {
+		if (!dwc_tt) {
 			size_t bitmap_size;
 
 			/*
@@ -4096,7 +4110,7 @@ struct dwc2_tt *dwc2_host_get_tt_info(struct dwc2_hsotg *hsotg, void *context,
 
 			dwc_tt = kzalloc(sizeof(*dwc_tt) + bitmap_size,
 					 mem_flags);
-			if (dwc_tt == NULL)
+			if (!dwc_tt)
 				return NULL;
 
 			dwc_tt->usb_tt = urb->dev->tt;
@@ -4123,7 +4137,7 @@ struct dwc2_tt *dwc2_host_get_tt_info(struct dwc2_hsotg *hsotg, void *context,
 void dwc2_host_put_tt_info(struct dwc2_hsotg *hsotg, struct dwc2_tt *dwc_tt)
 {
 	/* Model kfree and make put of NULL a no-op */
-	if (dwc_tt == NULL)
+	if (!dwc_tt)
 		return;
 
 	WARN_ON(dwc_tt->refcount < 1);
@@ -4206,7 +4220,6 @@ void dwc2_host_complete(struct dwc2_hsotg *hsotg, struct dwc2_qtd *qtd,
 			 usb_pipein(urb->pipe) ? "IN" : "OUT", status,
 			 urb->actual_length);
 
-
 	if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
 		urb->error_count = dwc2_hcd_urb_get_error_count(qtd->urb);
 		for (i = 0; i < urb->number_of_packets; ++i) {
@@ -4587,7 +4600,7 @@ static int _dwc2_hcd_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
 		dwc2_dump_urb_info(hcd, urb, "urb_enqueue");
 	}
 
-	if (ep == NULL)
+	if (!ep)
 		return -EINVAL;
 
 	if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS ||
@@ -4657,7 +4670,7 @@ static int _dwc2_hcd_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
 						 urb->iso_frame_desc[i].length);
 
 	urb->hcpriv = dwc2_urb;
-	qh = (struct dwc2_qh *) ep->hcpriv;
+	qh = (struct dwc2_qh *)ep->hcpriv;
 	/* Create QH for the endpoint if it doesn't exist */
 	if (!qh) {
 		qh = dwc2_hcd_qh_create(hsotg, dwc2_urb, mem_flags);
@@ -4712,7 +4725,7 @@ fail1:
 		dwc2_hcd_qh_unlink(hsotg, qh);
 		/* Free each QTD in the QH's QTD list */
 		list_for_each_entry_safe(qtd2, qtd2_tmp, &qh->qtd_list,
-							 qtd_list_entry)
+					 qtd_list_entry)
 			dwc2_hcd_qtd_unlink_and_free(hsotg, qtd2, qh);
 		dwc2_hcd_qh_free(hsotg, qh);
 	}
@@ -4860,6 +4873,61 @@ static void _dwc2_hcd_clear_tt_buffer_complete(struct usb_hcd *hcd,
 	spin_unlock_irqrestore(&hsotg->lock, flags);
 }
 
+/*
+ * HPRT0_SPD_HIGH_SPEED: high speed
+ * HPRT0_SPD_FULL_SPEED: full speed
+ */
+static void dwc2_change_bus_speed(struct usb_hcd *hcd, int speed)
+{
+	struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd);
+
+	if (hsotg->params.speed == speed)
+		return;
+
+	hsotg->params.speed = speed;
+	queue_work(hsotg->wq_otg, &hsotg->wf_otg);
+}
+
+static void dwc2_free_dev(struct usb_hcd *hcd, struct usb_device *udev)
+{
+	struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd);
+
+	if (!hsotg->params.change_speed_quirk)
+		return;
+
+	/*
+	 * On removal, set speed to default high-speed.
+	 */
+	if (udev->parent && udev->parent->speed > USB_SPEED_UNKNOWN &&
+	    udev->parent->speed < USB_SPEED_HIGH) {
+		dev_info(hsotg->dev, "Set speed to default high-speed\n");
+		dwc2_change_bus_speed(hcd, HPRT0_SPD_HIGH_SPEED);
+	}
+}
+
+static int dwc2_reset_device(struct usb_hcd *hcd, struct usb_device *udev)
+{
+	struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd);
+
+	if (!hsotg->params.change_speed_quirk)
+		return 0;
+
+	if (udev->speed == USB_SPEED_HIGH) {
+		dev_info(hsotg->dev, "Set speed to high-speed\n");
+		dwc2_change_bus_speed(hcd, HPRT0_SPD_HIGH_SPEED);
+	} else if ((udev->speed == USB_SPEED_FULL ||
+				udev->speed == USB_SPEED_LOW)) {
+		/*
+		 * Change speed setting to full-speed if there's
+		 * a full-speed or low-speed device plugged in.
+		 */
+		dev_info(hsotg->dev, "Set speed to full-speed\n");
+		dwc2_change_bus_speed(hcd, HPRT0_SPD_FULL_SPEED);
+	}
+
+	return 0;
+}
+
 static struct hc_driver dwc2_hc_driver = {
 	.description = "dwc2_hsotg",
 	.product_desc = "DWC OTG Controller",
@@ -4911,7 +4979,7 @@ static void dwc2_hcd_free(struct dwc2_hsotg *hsotg)
 	for (i = 0; i < MAX_EPS_CHANNELS; i++) {
 		struct dwc2_host_chan *chan = hsotg->hc_ptr_array[i];
 
-		if (chan != NULL) {
+		if (chan) {
 			dev_dbg(hsotg->dev, "HCD Free channel #%i, chan=%p\n",
 				i, chan);
 			hsotg->hc_ptr_array[i] = NULL;
@@ -4919,7 +4987,7 @@ static void dwc2_hcd_free(struct dwc2_hsotg *hsotg)
 		}
 	}
 
-	if (hsotg->params.host_dma > 0) {
+	if (hsotg->params.host_dma) {
 		if (hsotg->status_buf) {
 			dma_free_coherent(hsotg->dev, DWC2_HCD_STATUS_BUF_SIZE,
 					  hsotg->status_buf,
@@ -4967,8 +5035,10 @@ static void dwc2_hcd_release(struct dwc2_hsotg *hsotg)
  * USB bus with the core and calls the hc_driver->start() function. It returns
  * a negative error on failure.
  */
-int dwc2_hcd_init(struct dwc2_hsotg *hsotg, int irq)
+int dwc2_hcd_init(struct dwc2_hsotg *hsotg)
 {
+	struct platform_device *pdev = to_platform_device(hsotg->dev);
+	struct resource *res;
 	struct usb_hcd *hcd;
 	struct dwc2_host_chan *channel;
 	u32 hcfg;
@@ -4999,32 +5069,41 @@ int dwc2_hcd_init(struct dwc2_hsotg *hsotg, int irq)
 	hsotg->last_frame_num = HFNUM_MAX_FRNUM;
 
 	/* Check if the bus driver or platform code has setup a dma_mask */
-	if (hsotg->params.host_dma > 0 &&
-	    hsotg->dev->dma_mask == NULL) {
+	if (hsotg->params.host_dma &&
+	    !hsotg->dev->dma_mask) {
 		dev_warn(hsotg->dev,
 			 "dma_mask not set, disabling DMA\n");
-		hsotg->params.host_dma = 0;
-		hsotg->params.dma_desc_enable = 0;
+		hsotg->params.host_dma = false;
+		hsotg->params.dma_desc_enable = false;
 	}
 
 	/* Set device flags indicating whether the HCD supports DMA */
-	if (hsotg->params.host_dma > 0) {
+	if (hsotg->params.host_dma) {
 		if (dma_set_mask(hsotg->dev, DMA_BIT_MASK(32)) < 0)
 			dev_warn(hsotg->dev, "can't set DMA mask\n");
 		if (dma_set_coherent_mask(hsotg->dev, DMA_BIT_MASK(32)) < 0)
 			dev_warn(hsotg->dev, "can't set coherent DMA mask\n");
 	}
 
+	if (hsotg->params.change_speed_quirk) {
+		dwc2_hc_driver.free_dev = dwc2_free_dev;
+		dwc2_hc_driver.reset_device = dwc2_reset_device;
+	}
+
 	hcd = usb_create_hcd(&dwc2_hc_driver, hsotg->dev, dev_name(hsotg->dev));
 	if (!hcd)
 		goto error1;
 
-	if (hsotg->params.host_dma <= 0)
+	if (!hsotg->params.host_dma)
 		hcd->self.uses_dma = 0;
 
 	hcd->has_tt = 1;
 
-	((struct wrapper_priv_data *) &hcd->hcd_priv)->hsotg = hsotg;
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	hcd->rsrc_start = res->start;
+	hcd->rsrc_len = resource_size(res);
+
+	((struct wrapper_priv_data *)&hcd->hcd_priv)->hsotg = hsotg;
 	hsotg->priv = hcd;
 
 	/*
@@ -5072,7 +5151,7 @@ int dwc2_hcd_init(struct dwc2_hsotg *hsotg, int irq)
 
 	for (i = 0; i < num_channels; i++) {
 		channel = kzalloc(sizeof(*channel), GFP_KERNEL);
-		if (channel == NULL)
+		if (!channel)
 			goto error3;
 		channel->hc_num = i;
 		INIT_LIST_HEAD(&channel->split_order_list_entry);
@@ -5091,7 +5170,7 @@ int dwc2_hcd_init(struct dwc2_hsotg *hsotg, int irq)
 	 * done after usb_add_hcd since that function allocates the DMA buffer
 	 * pool.
 	 */
-	if (hsotg->params.host_dma > 0)
+	if (hsotg->params.host_dma)
 		hsotg->status_buf = dma_alloc_coherent(hsotg->dev,
 					DWC2_HCD_STATUS_BUF_SIZE,
 					&hsotg->status_buf_dma, GFP_KERNEL);
@@ -5121,8 +5200,8 @@ int dwc2_hcd_init(struct dwc2_hsotg *hsotg, int irq)
 			 * Disable descriptor dma mode since it will not be
 			 * usable.
 			 */
-			hsotg->params.dma_desc_enable = 0;
-			hsotg->params.dma_desc_fs_enable = 0;
+			hsotg->params.dma_desc_enable = false;
+			hsotg->params.dma_desc_fs_enable = false;
 		}
 
 		hsotg->desc_hsisoc_cache = kmem_cache_create("dwc2-hsisoc-desc",
@@ -5138,8 +5217,8 @@ int dwc2_hcd_init(struct dwc2_hsotg *hsotg, int irq)
 			 * Disable descriptor dma mode since it will not be
 			 * usable.
 			 */
-			hsotg->params.dma_desc_enable = 0;
-			hsotg->params.dma_desc_fs_enable = 0;
+			hsotg->params.dma_desc_enable = false;
+			hsotg->params.dma_desc_fs_enable = false;
 		}
 	}
 
@@ -5164,7 +5243,7 @@ int dwc2_hcd_init(struct dwc2_hsotg *hsotg, int irq)
 	 * allocates the DMA buffer pool, registers the USB bus, requests the
 	 * IRQ line, and calls hcd_start method.
 	 */
-	retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
+	retval = usb_add_hcd(hcd, hsotg->irq, IRQF_SHARED);
 	if (retval < 0)
 		goto error4;
 
diff --git a/drivers/usb/dwc2/hcd.h b/drivers/usb/dwc2/hcd.h
index 1ed5fa2beff4..11c3c145b793 100644
--- a/drivers/usb/dwc2/hcd.h
+++ b/drivers/usb/dwc2/hcd.h
@@ -521,29 +521,29 @@ static inline u8 dwc2_hcd_is_pipe_out(struct dwc2_hcd_pipe_info *pipe)
 	return !dwc2_hcd_is_pipe_in(pipe);
 }
 
-extern int dwc2_hcd_init(struct dwc2_hsotg *hsotg, int irq);
-extern void dwc2_hcd_remove(struct dwc2_hsotg *hsotg);
+int dwc2_hcd_init(struct dwc2_hsotg *hsotg);
+void dwc2_hcd_remove(struct dwc2_hsotg *hsotg);
 
 /* Transaction Execution Functions */
-extern enum dwc2_transaction_type dwc2_hcd_select_transactions(
+enum dwc2_transaction_type dwc2_hcd_select_transactions(
 						struct dwc2_hsotg *hsotg);
-extern void dwc2_hcd_queue_transactions(struct dwc2_hsotg *hsotg,
-					enum dwc2_transaction_type tr_type);
+void dwc2_hcd_queue_transactions(struct dwc2_hsotg *hsotg,
+				 enum dwc2_transaction_type tr_type);
 
 /* Schedule Queue Functions */
 /* Implemented in hcd_queue.c */
-extern struct dwc2_qh *dwc2_hcd_qh_create(struct dwc2_hsotg *hsotg,
-					  struct dwc2_hcd_urb *urb,
+struct dwc2_qh *dwc2_hcd_qh_create(struct dwc2_hsotg *hsotg,
+				   struct dwc2_hcd_urb *urb,
 					  gfp_t mem_flags);
-extern void dwc2_hcd_qh_free(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh);
-extern int dwc2_hcd_qh_add(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh);
-extern void dwc2_hcd_qh_unlink(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh);
-extern void dwc2_hcd_qh_deactivate(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh,
-				   int sched_csplit);
+void dwc2_hcd_qh_free(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh);
+int dwc2_hcd_qh_add(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh);
+void dwc2_hcd_qh_unlink(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh);
+void dwc2_hcd_qh_deactivate(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh,
+			    int sched_csplit);
 
-extern void dwc2_hcd_qtd_init(struct dwc2_qtd *qtd, struct dwc2_hcd_urb *urb);
-extern int dwc2_hcd_qtd_add(struct dwc2_hsotg *hsotg, struct dwc2_qtd *qtd,
-			    struct dwc2_qh *qh);
+void dwc2_hcd_qtd_init(struct dwc2_qtd *qtd, struct dwc2_hcd_urb *urb);
+int dwc2_hcd_qtd_add(struct dwc2_hsotg *hsotg, struct dwc2_qtd *qtd,
+		     struct dwc2_qh *qh);
 
 /* Unlinks and frees a QTD */
 static inline void dwc2_hcd_qtd_unlink_and_free(struct dwc2_hsotg *hsotg,
@@ -556,15 +556,15 @@ static inline void dwc2_hcd_qtd_unlink_and_free(struct dwc2_hsotg *hsotg,
 }
 
 /* Descriptor DMA support functions */
-extern void dwc2_hcd_start_xfer_ddma(struct dwc2_hsotg *hsotg,
-				     struct dwc2_qh *qh);
-extern void dwc2_hcd_complete_xfer_ddma(struct dwc2_hsotg *hsotg,
-					struct dwc2_host_chan *chan, int chnum,
+void dwc2_hcd_start_xfer_ddma(struct dwc2_hsotg *hsotg,
+			      struct dwc2_qh *qh);
+void dwc2_hcd_complete_xfer_ddma(struct dwc2_hsotg *hsotg,
+				 struct dwc2_host_chan *chan, int chnum,
 					enum dwc2_halt_status halt_status);
 
-extern int dwc2_hcd_qh_init_ddma(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh,
-				 gfp_t mem_flags);
-extern void dwc2_hcd_qh_free_ddma(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh);
+int dwc2_hcd_qh_init_ddma(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh,
+			  gfp_t mem_flags);
+void dwc2_hcd_qh_free_ddma(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh);
 
 /* Check if QH is non-periodic */
 #define dwc2_qh_is_non_per(_qh_ptr_) \
@@ -732,8 +732,8 @@ static inline u16 dwc2_hcd_get_ep_bandwidth(struct dwc2_hsotg *hsotg,
 	return qh->host_us;
 }
 
-extern void dwc2_hcd_save_data_toggle(struct dwc2_hsotg *hsotg,
-				      struct dwc2_host_chan *chan, int chnum,
+void dwc2_hcd_save_data_toggle(struct dwc2_hsotg *hsotg,
+			       struct dwc2_host_chan *chan, int chnum,
 				      struct dwc2_qtd *qtd);
 
 /* HCD Core API */
@@ -746,14 +746,14 @@ extern void dwc2_hcd_save_data_toggle(struct dwc2_hsotg *hsotg,
  * Returns IRQ_HANDLED if interrupt is handled
  * Return IRQ_NONE if interrupt is not handled
  */
-extern irqreturn_t dwc2_handle_hcd_intr(struct dwc2_hsotg *hsotg);
+irqreturn_t dwc2_handle_hcd_intr(struct dwc2_hsotg *hsotg);
 
 /**
  * dwc2_hcd_stop() - Halts the DWC_otg host mode operation
  *
  * @hsotg: The DWC2 HCD
  */
-extern void dwc2_hcd_stop(struct dwc2_hsotg *hsotg);
+void dwc2_hcd_stop(struct dwc2_hsotg *hsotg);
 
 /**
  * dwc2_hcd_is_b_host() - Returns 1 if core currently is acting as B host,
@@ -761,7 +761,7 @@ extern void dwc2_hcd_stop(struct dwc2_hsotg *hsotg);
  *
  * @hsotg: The DWC2 HCD
  */
-extern int dwc2_hcd_is_b_host(struct dwc2_hsotg *hsotg);
+int dwc2_hcd_is_b_host(struct dwc2_hsotg *hsotg);
 
 /**
  * dwc2_hcd_dump_state() - Dumps hsotg state
@@ -771,7 +771,7 @@ extern int dwc2_hcd_is_b_host(struct dwc2_hsotg *hsotg);
  * NOTE: This function will be removed once the peripheral controller code
  * is integrated and the driver is stable
  */
-extern void dwc2_hcd_dump_state(struct dwc2_hsotg *hsotg);
+void dwc2_hcd_dump_state(struct dwc2_hsotg *hsotg);
 
 /**
  * dwc2_hcd_dump_frrem() - Dumps the average frame remaining at SOF
@@ -784,7 +784,7 @@ extern void dwc2_hcd_dump_state(struct dwc2_hsotg *hsotg);
  * NOTE: This function will be removed once the peripheral controller code
  * is integrated and the driver is stable
  */
-extern void dwc2_hcd_dump_frrem(struct dwc2_hsotg *hsotg);
+void dwc2_hcd_dump_frrem(struct dwc2_hsotg *hsotg);
 
 /* URB interface */
 
@@ -793,15 +793,15 @@ extern void dwc2_hcd_dump_frrem(struct dwc2_hsotg *hsotg);
 #define URB_SEND_ZERO_PACKET	0x2
 
 /* Host driver callbacks */
-extern struct dwc2_tt *dwc2_host_get_tt_info(struct dwc2_hsotg *hsotg,
-					     void *context, gfp_t mem_flags,
-					     int *ttport);
-
-extern void dwc2_host_put_tt_info(struct dwc2_hsotg *hsotg,
-				  struct dwc2_tt *dwc_tt);
-extern int dwc2_host_get_speed(struct dwc2_hsotg *hsotg, void *context);
-extern void dwc2_host_complete(struct dwc2_hsotg *hsotg, struct dwc2_qtd *qtd,
-			       int status);
+struct dwc2_tt *dwc2_host_get_tt_info(struct dwc2_hsotg *hsotg,
+				      void *context, gfp_t mem_flags,
+				      int *ttport);
+
+void dwc2_host_put_tt_info(struct dwc2_hsotg *hsotg,
+			   struct dwc2_tt *dwc_tt);
+int dwc2_host_get_speed(struct dwc2_hsotg *hsotg, void *context);
+void dwc2_host_complete(struct dwc2_hsotg *hsotg, struct dwc2_qtd *qtd,
+			int status);
 
 #ifdef DEBUG
 /*
diff --git a/drivers/usb/dwc2/hcd_ddma.c b/drivers/usb/dwc2/hcd_ddma.c
index cf0367768cb3..b8bdf545c3a7 100644
--- a/drivers/usb/dwc2/hcd_ddma.c
+++ b/drivers/usb/dwc2/hcd_ddma.c
@@ -89,8 +89,8 @@ static int dwc2_desc_list_alloc(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh,
 {
 	struct kmem_cache *desc_cache;
 
-	if (qh->ep_type == USB_ENDPOINT_XFER_ISOC
-	    && qh->dev_speed == USB_SPEED_HIGH)
+	if (qh->ep_type == USB_ENDPOINT_XFER_ISOC &&
+	    qh->dev_speed == USB_SPEED_HIGH)
 		desc_cache = hsotg->desc_hsisoc_cache;
 	else
 		desc_cache = hsotg->desc_gen_cache;
@@ -106,7 +106,7 @@ static int dwc2_desc_list_alloc(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh,
 					   qh->desc_list_sz,
 					   DMA_TO_DEVICE);
 
-	qh->n_bytes = kzalloc(sizeof(u32) * dwc2_max_desc_num(qh), flags);
+	qh->n_bytes = kcalloc(dwc2_max_desc_num(qh), sizeof(u32), flags);
 	if (!qh->n_bytes) {
 		dma_unmap_single(hsotg->dev, qh->desc_list_dma,
 				 qh->desc_list_sz,
@@ -123,8 +123,8 @@ static void dwc2_desc_list_free(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh)
 {
 	struct kmem_cache *desc_cache;
 
-	if (qh->ep_type == USB_ENDPOINT_XFER_ISOC
-	    && qh->dev_speed == USB_SPEED_HIGH)
+	if (qh->ep_type == USB_ENDPOINT_XFER_ISOC &&
+	    qh->dev_speed == USB_SPEED_HIGH)
 		desc_cache = hsotg->desc_hsisoc_cache;
 	else
 		desc_cache = hsotg->desc_gen_cache;
@@ -175,7 +175,6 @@ static void dwc2_frame_list_free(struct dwc2_hsotg *hsotg)
 	hsotg->frame_list = NULL;
 
 	spin_unlock_irqrestore(&hsotg->lock, flags);
-
 }
 
 static void dwc2_per_sched_enable(struct dwc2_hsotg *hsotg, u32 fr_list_en)
@@ -297,7 +296,7 @@ static void dwc2_release_channel_ddma(struct dwc2_hsotg *hsotg,
 	struct dwc2_host_chan *chan = qh->channel;
 
 	if (dwc2_qh_is_non_per(qh)) {
-		if (hsotg->params.uframe_sched > 0)
+		if (hsotg->params.uframe_sched)
 			hsotg->available_host_channels++;
 		else
 			hsotg->non_periodic_channels--;
@@ -404,7 +403,7 @@ void dwc2_hcd_qh_free_ddma(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh)
 
 	if ((qh->ep_type == USB_ENDPOINT_XFER_ISOC ||
 	     qh->ep_type == USB_ENDPOINT_XFER_INT) &&
-	    (hsotg->params.uframe_sched > 0 ||
+	    (hsotg->params.uframe_sched ||
 	     !hsotg->periodic_channels) && hsotg->frame_list) {
 		dwc2_per_sched_disable(hsotg);
 		dwc2_frame_list_free(hsotg);
@@ -570,7 +569,7 @@ static void dwc2_fill_host_isoc_dma_desc(struct dwc2_hsotg *hsotg,
 #endif
 
 	dma_sync_single_for_device(hsotg->dev,
-			qh->desc_list_dma +
+				   qh->desc_list_dma +
 			(idx * sizeof(struct dwc2_dma_desc)),
 			sizeof(struct dwc2_dma_desc),
 			DMA_TO_DEVICE);
@@ -776,7 +775,7 @@ static void dwc2_init_non_isoc_dma_desc(struct dwc2_hsotg *hsotg,
 					 n_desc - 1,
 					 &qh->desc_list[n_desc - 1]);
 				dma_sync_single_for_device(hsotg->dev,
-					qh->desc_list_dma +
+							   qh->desc_list_dma +
 					((n_desc - 1) *
 					sizeof(struct dwc2_dma_desc)),
 					sizeof(struct dwc2_dma_desc),
@@ -816,7 +815,7 @@ static void dwc2_init_non_isoc_dma_desc(struct dwc2_hsotg *hsotg,
 			dev_vdbg(hsotg->dev, "set A bit in desc 0 (%p)\n",
 				 &qh->desc_list[0]);
 			dma_sync_single_for_device(hsotg->dev,
-					qh->desc_list_dma,
+						   qh->desc_list_dma,
 					sizeof(struct dwc2_dma_desc),
 					DMA_TO_DEVICE);
 		}
@@ -1064,7 +1063,7 @@ stop_scan:
 }
 
 static int dwc2_update_non_isoc_urb_state_ddma(struct dwc2_hsotg *hsotg,
-					struct dwc2_host_chan *chan,
+					       struct dwc2_host_chan *chan,
 					struct dwc2_qtd *qtd,
 					struct dwc2_dma_desc *dma_desc,
 					enum dwc2_halt_status halt_status,
diff --git a/drivers/usb/dwc2/hcd_intr.c b/drivers/usb/dwc2/hcd_intr.c
index b8f4b6aaf1d0..28a8210710b1 100644
--- a/drivers/usb/dwc2/hcd_intr.c
+++ b/drivers/usb/dwc2/hcd_intr.c
@@ -60,7 +60,7 @@ static void dwc2_track_missed_sofs(struct dwc2_hsotg *hsotg)
 
 	if (expected != curr_frame_number)
 		dwc2_sch_vdbg(hsotg, "MISSED SOF %04x != %04x\n",
-			expected, curr_frame_number);
+			      expected, curr_frame_number);
 
 #ifdef CONFIG_USB_DWC2_TRACK_MISSED_SOFS
 	if (hsotg->frame_num_idx < FRAME_NUM_ARRAY_SIZE) {
@@ -163,7 +163,7 @@ static void dwc2_sof_intr(struct dwc2_hsotg *hsotg)
 			 * (micro)frame
 			 */
 			list_move_tail(&qh->qh_list_entry,
-				  &hsotg->periodic_sched_ready);
+				       &hsotg->periodic_sched_ready);
 		}
 	}
 	tr_type = dwc2_hcd_select_transactions(hsotg);
@@ -297,8 +297,7 @@ static void dwc2_hprt0_enable(struct dwc2_hsotg *hsotg, u32 hprt0,
 			      HCFG_FSLSPCLKSEL_SHIFT;
 
 		if (prtspd == HPRT0_SPD_LOW_SPEED &&
-		    params->host_ls_low_power_phy_clk ==
-		    DWC2_HOST_LS_LOW_POWER_PHY_CLK_PARAM_6MHZ) {
+		    params->host_ls_low_power_phy_clk) {
 			/* 6 MHZ */
 			dev_vdbg(hsotg->dev,
 				 "FS_PHY programming HCFG to 6 MHz\n");
@@ -398,7 +397,7 @@ static void dwc2_port_intr(struct dwc2_hsotg *hsotg)
 			if (hsotg->params.dma_desc_fs_enable) {
 				u32 hcfg;
 
-				hsotg->params.dma_desc_enable = 0;
+				hsotg->params.dma_desc_enable = false;
 				hsotg->new_connection = false;
 				hcfg = dwc2_readl(hsotg->regs + HCFG);
 				hcfg &= ~HCFG_DESCDMA;
@@ -442,7 +441,7 @@ static u32 dwc2_get_actual_xfer_length(struct dwc2_hsotg *hsotg,
 			count = (hctsiz & TSIZ_XFERSIZE_MASK) >>
 				TSIZ_XFERSIZE_SHIFT;
 			length = chan->xfer_len - count;
-			if (short_read != NULL)
+			if (short_read)
 				*short_read = (count != 0);
 		} else if (chan->qh->do_split) {
 			length = qtd->ssplit_out_xfer_count;
@@ -604,7 +603,7 @@ static enum dwc2_halt_status dwc2_update_isoc_urb_state(
 		/* Skip whole frame */
 		if (chan->qh->do_split &&
 		    chan->ep_type == USB_ENDPOINT_XFER_ISOC && chan->ep_is_in &&
-		    hsotg->params.host_dma > 0) {
+		    hsotg->params.host_dma) {
 			qtd->complete_split = 0;
 			qtd->isoc_split_offset = 0;
 		}
@@ -743,7 +742,7 @@ cleanup:
 	dwc2_hc_cleanup(hsotg, chan);
 	list_add_tail(&chan->hc_list_entry, &hsotg->free_hc_list);
 
-	if (hsotg->params.uframe_sched > 0) {
+	if (hsotg->params.uframe_sched) {
 		hsotg->available_host_channels++;
 	} else {
 		switch (chan->ep_type) {
@@ -789,7 +788,7 @@ static void dwc2_halt_channel(struct dwc2_hsotg *hsotg,
 	if (dbg_hc(chan))
 		dev_vdbg(hsotg->dev, "%s()\n", __func__);
 
-	if (hsotg->params.host_dma > 0) {
+	if (hsotg->params.host_dma) {
 		if (dbg_hc(chan))
 			dev_vdbg(hsotg->dev, "DMA enabled\n");
 		dwc2_release_channel(hsotg, chan, qtd, halt_status);
@@ -823,7 +822,7 @@ static void dwc2_halt_channel(struct dwc2_hsotg *hsotg,
 			 * processed.
 			 */
 			list_move_tail(&chan->qh->qh_list_entry,
-				  &hsotg->periodic_sched_assigned);
+				       &hsotg->periodic_sched_assigned);
 
 			/*
 			 * Make sure the Periodic Tx FIFO Empty interrupt is
@@ -979,7 +978,7 @@ static void dwc2_hc_xfercomp_intr(struct dwc2_hsotg *hsotg,
 
 	pipe_type = dwc2_hcd_get_pipe_type(&urb->pipe_info);
 
-	if (hsotg->params.dma_desc_enable > 0) {
+	if (hsotg->params.dma_desc_enable) {
 		dwc2_hcd_complete_xfer_ddma(hsotg, chan, chnum, halt_status);
 		if (pipe_type == USB_ENDPOINT_XFER_ISOC)
 			/* Do not disable the interrupt, just clear it */
@@ -990,7 +989,7 @@ static void dwc2_hc_xfercomp_intr(struct dwc2_hsotg *hsotg,
 	/* Handle xfer complete on CSPLIT */
 	if (chan->qh->do_split) {
 		if (chan->ep_type == USB_ENDPOINT_XFER_ISOC && chan->ep_is_in &&
-		    hsotg->params.host_dma > 0) {
+		    hsotg->params.host_dma) {
 			if (qtd->complete_split &&
 			    dwc2_xfercomp_isoc_split_in(hsotg, chan, chnum,
 							qtd))
@@ -1078,7 +1077,8 @@ static void dwc2_hc_xfercomp_intr(struct dwc2_hsotg *hsotg,
 			dev_vdbg(hsotg->dev, "  Isochronous transfer complete\n");
 		if (qtd->isoc_split_pos == DWC2_HCSPLT_XACTPOS_ALL)
 			halt_status = dwc2_update_isoc_urb_state(hsotg, chan,
-					chnum, qtd, DWC2_HC_XFER_COMPLETE);
+							chnum, qtd,
+							DWC2_HC_XFER_COMPLETE);
 		dwc2_complete_periodic_xfer(hsotg, chan, chnum, qtd,
 					    halt_status);
 		break;
@@ -1102,7 +1102,7 @@ static void dwc2_hc_stall_intr(struct dwc2_hsotg *hsotg,
 	dev_dbg(hsotg->dev, "--Host Channel %d Interrupt: STALL Received--\n",
 		chnum);
 
-	if (hsotg->params.dma_desc_enable > 0) {
+	if (hsotg->params.dma_desc_enable) {
 		dwc2_hcd_complete_xfer_ddma(hsotg, chan, chnum,
 					    DWC2_HC_XFER_STALL);
 		goto handle_stall_done;
@@ -1212,7 +1212,7 @@ static void dwc2_hc_nak_intr(struct dwc2_hsotg *hsotg,
 	switch (dwc2_hcd_get_pipe_type(&qtd->urb->pipe_info)) {
 	case USB_ENDPOINT_XFER_CONTROL:
 	case USB_ENDPOINT_XFER_BULK:
-		if (hsotg->params.host_dma > 0 && chan->ep_is_in) {
+		if (hsotg->params.host_dma && chan->ep_is_in) {
 			/*
 			 * NAK interrupts are enabled on bulk/control IN
 			 * transfers in DMA mode for the sole purpose of
@@ -1358,7 +1358,7 @@ static void dwc2_hc_nyet_intr(struct dwc2_hsotg *hsotg,
 	 */
 	if (chan->do_split && chan->complete_split) {
 		if (chan->ep_is_in && chan->ep_type == USB_ENDPOINT_XFER_ISOC &&
-		    hsotg->params.host_dma > 0) {
+		    hsotg->params.host_dma) {
 			qtd->complete_split = 0;
 			qtd->isoc_split_offset = 0;
 			qtd->isoc_frame_index++;
@@ -1379,7 +1379,7 @@ static void dwc2_hc_nyet_intr(struct dwc2_hsotg *hsotg,
 			struct dwc2_qh *qh = chan->qh;
 			bool past_end;
 
-			if (hsotg->params.uframe_sched <= 0) {
+			if (!hsotg->params.uframe_sched) {
 				int frnum = dwc2_hcd_get_frame_number(hsotg);
 
 				/* Don't have num_hs_transfers; simple logic */
@@ -1389,22 +1389,27 @@ static void dwc2_hc_nyet_intr(struct dwc2_hsotg *hsotg,
 				int end_frnum;
 
 				/*
-				* Figure out the end frame based on schedule.
-				*
-				* We don't want to go on trying again and again
-				* forever.  Let's stop when we've done all the
-				* transfers that were scheduled.
-				*
-				* We're going to be comparing start_active_frame
-				* and next_active_frame, both of which are 1
-				* before the time the packet goes on the wire,
-				* so that cancels out.  Basically if had 1
-				* transfer and we saw 1 NYET then we're done.
-				* We're getting a NYET here so if next >=
-				* (start + num_transfers) we're done. The
-				* complexity is that for all but ISOC_OUT we
-				* skip one slot.
-				*/
+				 * Figure out the end frame based on
+				 * schedule.
+				 *
+				 * We don't want to go on trying again
+				 * and again forever. Let's stop when
+				 * we've done all the transfers that
+				 * were scheduled.
+				 *
+				 * We're going to be comparing
+				 * start_active_frame and
+				 * next_active_frame, both of which
+				 * are 1 before the time the packet
+				 * goes on the wire, so that cancels
+				 * out. Basically if had 1 transfer
+				 * and we saw 1 NYET then we're done.
+				 * We're getting a NYET here so if
+				 * next >= (start + num_transfers)
+				 * we're done. The complexity is that
+				 * for all but ISOC_OUT we skip one
+				 * slot.
+				 */
 				end_frnum = dwc2_frame_num_inc(
 					qh->start_active_frame,
 					qh->num_hs_transfers);
@@ -1472,7 +1477,7 @@ static void dwc2_hc_babble_intr(struct dwc2_hsotg *hsotg,
 
 	dwc2_hc_handle_tt_clear(hsotg, chan, qtd);
 
-	if (hsotg->params.dma_desc_enable > 0) {
+	if (hsotg->params.dma_desc_enable) {
 		dwc2_hcd_complete_xfer_ddma(hsotg, chan, chnum,
 					    DWC2_HC_XFER_BABBLE_ERR);
 		goto disable_int;
@@ -1577,7 +1582,7 @@ static void dwc2_hc_ahberr_intr(struct dwc2_hsotg *hsotg,
 	dev_err(hsotg->dev, "  Interval: %d\n", urb->interval);
 
 	/* Core halts the channel for Descriptor DMA mode */
-	if (hsotg->params.dma_desc_enable > 0) {
+	if (hsotg->params.dma_desc_enable) {
 		dwc2_hcd_complete_xfer_ddma(hsotg, chan, chnum,
 					    DWC2_HC_XFER_AHB_ERR);
 		goto handle_ahberr_done;
@@ -1609,7 +1614,7 @@ static void dwc2_hc_xacterr_intr(struct dwc2_hsotg *hsotg,
 
 	dwc2_hc_handle_tt_clear(hsotg, chan, qtd);
 
-	if (hsotg->params.dma_desc_enable > 0) {
+	if (hsotg->params.dma_desc_enable) {
 		dwc2_hcd_complete_xfer_ddma(hsotg, chan, chnum,
 					    DWC2_HC_XFER_XACT_ERR);
 		goto handle_xacterr_done;
@@ -1620,7 +1625,6 @@ static void dwc2_hc_xacterr_intr(struct dwc2_hsotg *hsotg,
 	case USB_ENDPOINT_XFER_BULK:
 		qtd->error_count++;
 		if (!chan->qh->ping_state) {
-
 			dwc2_update_urb_state_abn(hsotg, chan, chnum, qtd->urb,
 						  qtd, DWC2_HC_XFER_XACT_ERR);
 			dwc2_hcd_save_data_toggle(hsotg, chan, chnum, qtd);
@@ -1645,7 +1649,7 @@ static void dwc2_hc_xacterr_intr(struct dwc2_hsotg *hsotg,
 			enum dwc2_halt_status halt_status;
 
 			halt_status = dwc2_update_isoc_urb_state(hsotg, chan,
-					chnum, qtd, DWC2_HC_XFER_XACT_ERR);
+					 chnum, qtd, DWC2_HC_XFER_XACT_ERR);
 			dwc2_halt_channel(hsotg, chan, qtd, halt_status);
 		}
 		break;
@@ -1803,8 +1807,8 @@ static void dwc2_hc_chhltd_intr_dma(struct dwc2_hsotg *hsotg,
 
 	if (chan->halt_status == DWC2_HC_XFER_URB_DEQUEUE ||
 	    (chan->halt_status == DWC2_HC_XFER_AHB_ERR &&
-	     hsotg->params.dma_desc_enable <= 0)) {
-		if (hsotg->params.dma_desc_enable > 0)
+	     !hsotg->params.dma_desc_enable)) {
+		if (hsotg->params.dma_desc_enable)
 			dwc2_hcd_complete_xfer_ddma(hsotg, chan, chnum,
 						    chan->halt_status);
 		else
@@ -1835,7 +1839,7 @@ static void dwc2_hc_chhltd_intr_dma(struct dwc2_hsotg *hsotg,
 	} else if (chan->hcint & HCINTMSK_STALL) {
 		dwc2_hc_stall_intr(hsotg, chan, chnum, qtd);
 	} else if ((chan->hcint & HCINTMSK_XACTERR) &&
-		   hsotg->params.dma_desc_enable <= 0) {
+		   !hsotg->params.dma_desc_enable) {
 		if (out_nak_enh) {
 			if (chan->hcint &
 			    (HCINTMSK_NYET | HCINTMSK_NAK | HCINTMSK_ACK)) {
@@ -1855,10 +1859,10 @@ static void dwc2_hc_chhltd_intr_dma(struct dwc2_hsotg *hsotg,
 		 */
 		dwc2_hc_xacterr_intr(hsotg, chan, chnum, qtd);
 	} else if ((chan->hcint & HCINTMSK_XCS_XACT) &&
-		   hsotg->params.dma_desc_enable > 0) {
+		   hsotg->params.dma_desc_enable) {
 		dwc2_hc_xacterr_intr(hsotg, chan, chnum, qtd);
 	} else if ((chan->hcint & HCINTMSK_AHBERR) &&
-		   hsotg->params.dma_desc_enable > 0) {
+		   hsotg->params.dma_desc_enable) {
 		dwc2_hc_ahberr_intr(hsotg, chan, chnum, qtd);
 	} else if (chan->hcint & HCINTMSK_BBLERR) {
 		dwc2_hc_babble_intr(hsotg, chan, chnum, qtd);
@@ -1951,7 +1955,7 @@ static void dwc2_hc_chhltd_intr(struct dwc2_hsotg *hsotg,
 		dev_vdbg(hsotg->dev, "--Host Channel %d Interrupt: Channel Halted--\n",
 			 chnum);
 
-	if (hsotg->params.host_dma > 0) {
+	if (hsotg->params.host_dma) {
 		dwc2_hc_chhltd_intr_dma(hsotg, chan, chnum, qtd);
 	} else {
 		if (!dwc2_halt_status_ok(hsotg, chan, chnum, qtd))
@@ -1970,7 +1974,7 @@ static bool dwc2_check_qtd_still_ok(struct dwc2_qtd *qtd, struct dwc2_qh *qh)
 {
 	struct dwc2_qtd *cur_head;
 
-	if (qh == NULL)
+	if (!qh)
 		return false;
 
 	cur_head = list_first_entry(&qh->qtd_list, struct dwc2_qtd,
@@ -2028,7 +2032,7 @@ static void dwc2_hc_n_intr(struct dwc2_hsotg *hsotg, int chnum)
 		 * interrupt unmasked
 		 */
 		WARN_ON(hcint != HCINTMSK_CHHLTD);
-		if (hsotg->params.dma_desc_enable > 0)
+		if (hsotg->params.dma_desc_enable)
 			dwc2_hcd_complete_xfer_ddma(hsotg, chan, chnum,
 						    chan->halt_status);
 		else
@@ -2056,7 +2060,7 @@ static void dwc2_hc_n_intr(struct dwc2_hsotg *hsotg, int chnum)
 	qtd = list_first_entry(&chan->qh->qtd_list, struct dwc2_qtd,
 			       qtd_list_entry);
 
-	if (hsotg->params.host_dma <= 0) {
+	if (!hsotg->params.host_dma) {
 		if ((hcint & HCINTMSK_CHHLTD) && hcint != HCINTMSK_CHHLTD)
 			hcint &= ~HCINTMSK_CHHLTD;
 	}
diff --git a/drivers/usb/dwc2/hcd_queue.c b/drivers/usb/dwc2/hcd_queue.c
index 5713f03a4e56..3ae8b1bbaa55 100644
--- a/drivers/usb/dwc2/hcd_queue.c
+++ b/drivers/usb/dwc2/hcd_queue.c
@@ -76,14 +76,13 @@ static int dwc2_periodic_channel_available(struct dwc2_hsotg *hsotg)
 	int num_channels;
 
 	num_channels = hsotg->params.host_channels;
-	if (hsotg->periodic_channels + hsotg->non_periodic_channels <
-								num_channels
-	    && hsotg->periodic_channels < num_channels - 1) {
+	if ((hsotg->periodic_channels + hsotg->non_periodic_channels <
+	     num_channels) && (hsotg->periodic_channels < num_channels - 1)) {
 		status = 0;
 	} else {
 		dev_dbg(hsotg->dev,
-			"%s: Total channels: %d, Periodic: %d, "
-			"Non-periodic: %d\n", __func__, num_channels,
+			"%s: Total channels: %d, Periodic: %d, Non-periodic: %d\n",
+			__func__, num_channels,
 			hsotg->periodic_channels, hsotg->non_periodic_channels);
 		status = -ENOSPC;
 	}
@@ -485,7 +484,6 @@ static void pmap_print(unsigned long *map, int bits_per_period,
 	}
 }
 
-
 struct dwc2_qh_print_data {
 	struct dwc2_hsotg *hsotg;
 	struct dwc2_qh *qh;
@@ -558,7 +556,6 @@ static void dwc2_qh_schedule_print(struct dwc2_hsotg *hsotg,
 			   DWC2_HS_SCHEDULE_UFRAMES, "uFrame", "us",
 			   dwc2_qh_print, &print_data);
 	}
-	return;
 }
 #else
 static inline void dwc2_qh_schedule_print(struct dwc2_hsotg *hsotg,
@@ -587,7 +584,7 @@ static int dwc2_ls_pmap_schedule(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh,
 	unsigned long *map = dwc2_get_ls_map(hsotg, qh);
 	int slice;
 
-	if (map == NULL)
+	if (!map)
 		return -EINVAL;
 
 	/*
@@ -626,7 +623,7 @@ static void dwc2_ls_pmap_unschedule(struct dwc2_hsotg *hsotg,
 	unsigned long *map = dwc2_get_ls_map(hsotg, qh);
 
 	/* Schedule should have failed, so no worries about no error code */
-	if (map == NULL)
+	if (!map)
 		return;
 
 	pmap_unschedule(map, DWC2_LS_PERIODIC_SLICES_PER_FRAME,
@@ -1107,7 +1104,7 @@ static void dwc2_pick_first_frame(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh)
 	next_active_frame = earliest_frame;
 
 	/* Get the "no microframe schduler" out of the way... */
-	if (hsotg->params.uframe_sched <= 0) {
+	if (!hsotg->params.uframe_sched) {
 		if (qh->do_split)
 			/* Splits are active at microframe 0 minus 1 */
 			next_active_frame |= 0x7;
@@ -1182,7 +1179,7 @@ exit:
 	qh->start_active_frame = next_active_frame;
 
 	dwc2_sch_vdbg(hsotg, "QH=%p First fn=%04x nxt=%04x\n",
-		     qh, frame_number, qh->next_active_frame);
+		      qh, frame_number, qh->next_active_frame);
 }
 
 /**
@@ -1200,7 +1197,7 @@ static int dwc2_do_reserve(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh)
 {
 	int status;
 
-	if (hsotg->params.uframe_sched > 0) {
+	if (hsotg->params.uframe_sched) {
 		status = dwc2_uframe_schedule(hsotg, qh);
 	} else {
 		status = dwc2_periodic_channel_available(hsotg);
@@ -1221,7 +1218,7 @@ static int dwc2_do_reserve(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh)
 		return status;
 	}
 
-	if (hsotg->params.uframe_sched <= 0)
+	if (!hsotg->params.uframe_sched)
 		/* Reserve periodic channel */
 		hsotg->periodic_channels++;
 
@@ -1257,7 +1254,7 @@ static void dwc2_do_unreserve(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh)
 	/* Update claimed usecs per (micro)frame */
 	hsotg->periodic_usecs -= qh->host_us;
 
-	if (hsotg->params.uframe_sched > 0) {
+	if (hsotg->params.uframe_sched) {
 		dwc2_uframe_unschedule(hsotg, qh);
 	} else {
 		/* Release periodic channel reservation */
@@ -1394,7 +1391,7 @@ static int dwc2_schedule_periodic(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh)
 
 	qh->unreserve_pending = 0;
 
-	if (hsotg->params.dma_desc_enable > 0)
+	if (hsotg->params.dma_desc_enable)
 		/* Don't rely on SOF and start in ready schedule */
 		list_add_tail(&qh->qh_list_entry, &hsotg->periodic_sched_ready);
 	else
@@ -1501,7 +1498,6 @@ static void dwc2_qh_init(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh,
 			device_ns += dwc_tt->usb_tt->think_time;
 		qh->device_us = NS_TO_US(device_ns);
 
-
 		qh->device_interval = urb->interval;
 		qh->host_interval = urb->interval * (do_split ? 8 : 1);
 
@@ -1587,7 +1583,7 @@ static void dwc2_qh_init(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh,
  * Return: Pointer to the newly allocated QH, or NULL on error
  */
 struct dwc2_qh *dwc2_hcd_qh_create(struct dwc2_hsotg *hsotg,
-					  struct dwc2_hcd_urb *urb,
+				   struct dwc2_hcd_urb *urb,
 					  gfp_t mem_flags)
 {
 	struct dwc2_qh *qh;
@@ -1602,7 +1598,7 @@ struct dwc2_qh *dwc2_hcd_qh_create(struct dwc2_hsotg *hsotg,
 
 	dwc2_qh_init(hsotg, qh, urb, mem_flags);
 
-	if (hsotg->params.dma_desc_enable > 0 &&
+	if (hsotg->params.dma_desc_enable &&
 	    dwc2_hcd_qh_init_ddma(hsotg, qh, mem_flags) < 0) {
 		dwc2_hcd_qh_free(hsotg, qh);
 		return NULL;
@@ -1714,7 +1710,7 @@ void dwc2_hcd_qh_unlink(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh)
 	dwc2_deschedule_periodic(hsotg, qh);
 	hsotg->periodic_qh_count--;
 	if (!hsotg->periodic_qh_count &&
-	    hsotg->params.dma_desc_enable <= 0) {
+	    !hsotg->params.dma_desc_enable) {
 		intr_mask = dwc2_readl(hsotg->regs + GINTMSK);
 		intr_mask &= ~GINTSTS_SOF;
 		dwc2_writel(intr_mask, hsotg->regs + GINTMSK);
@@ -1741,7 +1737,7 @@ void dwc2_hcd_qh_unlink(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh)
  * Return: number missed by (or 0 if we didn't miss).
  */
 static int dwc2_next_for_periodic_split(struct dwc2_hsotg *hsotg,
-					 struct dwc2_qh *qh, u16 frame_number)
+					struct dwc2_qh *qh, u16 frame_number)
 {
 	u16 old_frame = qh->next_active_frame;
 	u16 prev_frame_number = dwc2_frame_num_dec(frame_number, 1);
@@ -1804,7 +1800,7 @@ static int dwc2_next_for_periodic_split(struct dwc2_hsotg *hsotg,
  * Return: number missed by (or 0 if we didn't miss).
  */
 static int dwc2_next_periodic_start(struct dwc2_hsotg *hsotg,
-				     struct dwc2_qh *qh, u16 frame_number)
+				    struct dwc2_qh *qh, u16 frame_number)
 {
 	int missed = 0;
 	u16 interval = qh->host_interval;
@@ -1926,7 +1922,7 @@ void dwc2_hcd_qh_deactivate(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh,
 		missed = dwc2_next_periodic_start(hsotg, qh, frame_number);
 
 	dwc2_sch_vdbg(hsotg,
-		     "QH=%p next(%d) fn=%04x, sch=%04x=>%04x (%+d) miss=%d %s\n",
+		      "QH=%p next(%d) fn=%04x, sch=%04x=>%04x (%+d) miss=%d %s\n",
 		     qh, sched_next_periodic_split, frame_number, old_frame,
 		     qh->next_active_frame,
 		     dwc2_frame_num_dec(qh->next_active_frame, old_frame),
diff --git a/drivers/usb/dwc2/hw.h b/drivers/usb/dwc2/hw.h
index 5be056b39e5c..bde72489ae66 100644
--- a/drivers/usb/dwc2/hw.h
+++ b/drivers/usb/dwc2/hw.h
@@ -40,37 +40,37 @@
 #define HSOTG_REG(x)	(x)
 
 #define GOTGCTL				HSOTG_REG(0x000)
-#define GOTGCTL_CHIRPEN			(1 << 27)
+#define GOTGCTL_CHIRPEN			BIT(27)
 #define GOTGCTL_MULT_VALID_BC_MASK	(0x1f << 22)
 #define GOTGCTL_MULT_VALID_BC_SHIFT	22
-#define GOTGCTL_OTGVER			(1 << 20)
-#define GOTGCTL_BSESVLD			(1 << 19)
-#define GOTGCTL_ASESVLD			(1 << 18)
-#define GOTGCTL_DBNC_SHORT		(1 << 17)
-#define GOTGCTL_CONID_B			(1 << 16)
-#define GOTGCTL_DBNCE_FLTR_BYPASS	(1 << 15)
-#define GOTGCTL_DEVHNPEN		(1 << 11)
-#define GOTGCTL_HSTSETHNPEN		(1 << 10)
-#define GOTGCTL_HNPREQ			(1 << 9)
-#define GOTGCTL_HSTNEGSCS		(1 << 8)
-#define GOTGCTL_SESREQ			(1 << 1)
-#define GOTGCTL_SESREQSCS		(1 << 0)
+#define GOTGCTL_OTGVER			BIT(20)
+#define GOTGCTL_BSESVLD			BIT(19)
+#define GOTGCTL_ASESVLD			BIT(18)
+#define GOTGCTL_DBNC_SHORT		BIT(17)
+#define GOTGCTL_CONID_B			BIT(16)
+#define GOTGCTL_DBNCE_FLTR_BYPASS	BIT(15)
+#define GOTGCTL_DEVHNPEN		BIT(11)
+#define GOTGCTL_HSTSETHNPEN		BIT(10)
+#define GOTGCTL_HNPREQ			BIT(9)
+#define GOTGCTL_HSTNEGSCS		BIT(8)
+#define GOTGCTL_SESREQ			BIT(1)
+#define GOTGCTL_SESREQSCS		BIT(0)
 
 #define GOTGINT				HSOTG_REG(0x004)
-#define GOTGINT_DBNCE_DONE		(1 << 19)
-#define GOTGINT_A_DEV_TOUT_CHG		(1 << 18)
-#define GOTGINT_HST_NEG_DET		(1 << 17)
-#define GOTGINT_HST_NEG_SUC_STS_CHNG	(1 << 9)
-#define GOTGINT_SES_REQ_SUC_STS_CHNG	(1 << 8)
-#define GOTGINT_SES_END_DET		(1 << 2)
+#define GOTGINT_DBNCE_DONE		BIT(19)
+#define GOTGINT_A_DEV_TOUT_CHG		BIT(18)
+#define GOTGINT_HST_NEG_DET		BIT(17)
+#define GOTGINT_HST_NEG_SUC_STS_CHNG	BIT(9)
+#define GOTGINT_SES_REQ_SUC_STS_CHNG	BIT(8)
+#define GOTGINT_SES_END_DET		BIT(2)
 
 #define GAHBCFG				HSOTG_REG(0x008)
-#define GAHBCFG_AHB_SINGLE		(1 << 23)
-#define GAHBCFG_NOTI_ALL_DMA_WRIT	(1 << 22)
-#define GAHBCFG_REM_MEM_SUPP		(1 << 21)
-#define GAHBCFG_P_TXF_EMP_LVL		(1 << 8)
-#define GAHBCFG_NP_TXF_EMP_LVL		(1 << 7)
-#define GAHBCFG_DMA_EN			(1 << 5)
+#define GAHBCFG_AHB_SINGLE		BIT(23)
+#define GAHBCFG_NOTI_ALL_DMA_WRIT	BIT(22)
+#define GAHBCFG_REM_MEM_SUPP		BIT(21)
+#define GAHBCFG_P_TXF_EMP_LVL		BIT(8)
+#define GAHBCFG_NP_TXF_EMP_LVL		BIT(7)
+#define GAHBCFG_DMA_EN			BIT(5)
 #define GAHBCFG_HBSTLEN_MASK		(0xf << 1)
 #define GAHBCFG_HBSTLEN_SHIFT		1
 #define GAHBCFG_HBSTLEN_SINGLE		0
@@ -78,38 +78,38 @@
 #define GAHBCFG_HBSTLEN_INCR4		3
 #define GAHBCFG_HBSTLEN_INCR8		5
 #define GAHBCFG_HBSTLEN_INCR16		7
-#define GAHBCFG_GLBL_INTR_EN		(1 << 0)
+#define GAHBCFG_GLBL_INTR_EN		BIT(0)
 #define GAHBCFG_CTRL_MASK		(GAHBCFG_P_TXF_EMP_LVL | \
 					 GAHBCFG_NP_TXF_EMP_LVL | \
 					 GAHBCFG_DMA_EN | \
 					 GAHBCFG_GLBL_INTR_EN)
 
 #define GUSBCFG				HSOTG_REG(0x00C)
-#define GUSBCFG_FORCEDEVMODE		(1 << 30)
-#define GUSBCFG_FORCEHOSTMODE		(1 << 29)
-#define GUSBCFG_TXENDDELAY		(1 << 28)
-#define GUSBCFG_ICTRAFFICPULLREMOVE	(1 << 27)
-#define GUSBCFG_ICUSBCAP		(1 << 26)
-#define GUSBCFG_ULPI_INT_PROT_DIS	(1 << 25)
-#define GUSBCFG_INDICATORPASSTHROUGH	(1 << 24)
-#define GUSBCFG_INDICATORCOMPLEMENT	(1 << 23)
-#define GUSBCFG_TERMSELDLPULSE		(1 << 22)
-#define GUSBCFG_ULPI_INT_VBUS_IND	(1 << 21)
-#define GUSBCFG_ULPI_EXT_VBUS_DRV	(1 << 20)
-#define GUSBCFG_ULPI_CLK_SUSP_M		(1 << 19)
-#define GUSBCFG_ULPI_AUTO_RES		(1 << 18)
-#define GUSBCFG_ULPI_FS_LS		(1 << 17)
-#define GUSBCFG_OTG_UTMI_FS_SEL		(1 << 16)
-#define GUSBCFG_PHY_LP_CLK_SEL		(1 << 15)
+#define GUSBCFG_FORCEDEVMODE		BIT(30)
+#define GUSBCFG_FORCEHOSTMODE		BIT(29)
+#define GUSBCFG_TXENDDELAY		BIT(28)
+#define GUSBCFG_ICTRAFFICPULLREMOVE	BIT(27)
+#define GUSBCFG_ICUSBCAP		BIT(26)
+#define GUSBCFG_ULPI_INT_PROT_DIS	BIT(25)
+#define GUSBCFG_INDICATORPASSTHROUGH	BIT(24)
+#define GUSBCFG_INDICATORCOMPLEMENT	BIT(23)
+#define GUSBCFG_TERMSELDLPULSE		BIT(22)
+#define GUSBCFG_ULPI_INT_VBUS_IND	BIT(21)
+#define GUSBCFG_ULPI_EXT_VBUS_DRV	BIT(20)
+#define GUSBCFG_ULPI_CLK_SUSP_M		BIT(19)
+#define GUSBCFG_ULPI_AUTO_RES		BIT(18)
+#define GUSBCFG_ULPI_FS_LS		BIT(17)
+#define GUSBCFG_OTG_UTMI_FS_SEL		BIT(16)
+#define GUSBCFG_PHY_LP_CLK_SEL		BIT(15)
 #define GUSBCFG_USBTRDTIM_MASK		(0xf << 10)
 #define GUSBCFG_USBTRDTIM_SHIFT		10
-#define GUSBCFG_HNPCAP			(1 << 9)
-#define GUSBCFG_SRPCAP			(1 << 8)
-#define GUSBCFG_DDRSEL			(1 << 7)
-#define GUSBCFG_PHYSEL			(1 << 6)
-#define GUSBCFG_FSINTF			(1 << 5)
-#define GUSBCFG_ULPI_UTMI_SEL		(1 << 4)
-#define GUSBCFG_PHYIF16			(1 << 3)
+#define GUSBCFG_HNPCAP			BIT(9)
+#define GUSBCFG_SRPCAP			BIT(8)
+#define GUSBCFG_DDRSEL			BIT(7)
+#define GUSBCFG_PHYSEL			BIT(6)
+#define GUSBCFG_FSINTF			BIT(5)
+#define GUSBCFG_ULPI_UTMI_SEL		BIT(4)
+#define GUSBCFG_PHYIF16			BIT(3)
 #define GUSBCFG_PHYIF8			(0 << 3)
 #define GUSBCFG_TOUTCAL_MASK		(0x7 << 0)
 #define GUSBCFG_TOUTCAL_SHIFT		0
@@ -117,54 +117,54 @@
 #define GUSBCFG_TOUTCAL(_x)		((_x) << 0)
 
 #define GRSTCTL				HSOTG_REG(0x010)
-#define GRSTCTL_AHBIDLE			(1 << 31)
-#define GRSTCTL_DMAREQ			(1 << 30)
+#define GRSTCTL_AHBIDLE			BIT(31)
+#define GRSTCTL_DMAREQ			BIT(30)
 #define GRSTCTL_TXFNUM_MASK		(0x1f << 6)
 #define GRSTCTL_TXFNUM_SHIFT		6
 #define GRSTCTL_TXFNUM_LIMIT		0x1f
 #define GRSTCTL_TXFNUM(_x)		((_x) << 6)
-#define GRSTCTL_TXFFLSH			(1 << 5)
-#define GRSTCTL_RXFFLSH			(1 << 4)
-#define GRSTCTL_IN_TKNQ_FLSH		(1 << 3)
-#define GRSTCTL_FRMCNTRRST		(1 << 2)
-#define GRSTCTL_HSFTRST			(1 << 1)
-#define GRSTCTL_CSFTRST			(1 << 0)
+#define GRSTCTL_TXFFLSH			BIT(5)
+#define GRSTCTL_RXFFLSH			BIT(4)
+#define GRSTCTL_IN_TKNQ_FLSH		BIT(3)
+#define GRSTCTL_FRMCNTRRST		BIT(2)
+#define GRSTCTL_HSFTRST			BIT(1)
+#define GRSTCTL_CSFTRST			BIT(0)
 
 #define GINTSTS				HSOTG_REG(0x014)
 #define GINTMSK				HSOTG_REG(0x018)
-#define GINTSTS_WKUPINT			(1 << 31)
-#define GINTSTS_SESSREQINT		(1 << 30)
-#define GINTSTS_DISCONNINT		(1 << 29)
-#define GINTSTS_CONIDSTSCHNG		(1 << 28)
-#define GINTSTS_LPMTRANRCVD		(1 << 27)
-#define GINTSTS_PTXFEMP			(1 << 26)
-#define GINTSTS_HCHINT			(1 << 25)
-#define GINTSTS_PRTINT			(1 << 24)
-#define GINTSTS_RESETDET		(1 << 23)
-#define GINTSTS_FET_SUSP		(1 << 22)
-#define GINTSTS_INCOMPL_IP		(1 << 21)
-#define GINTSTS_INCOMPL_SOOUT		(1 << 21)
-#define GINTSTS_INCOMPL_SOIN		(1 << 20)
-#define GINTSTS_OEPINT			(1 << 19)
-#define GINTSTS_IEPINT			(1 << 18)
-#define GINTSTS_EPMIS			(1 << 17)
-#define GINTSTS_RESTOREDONE		(1 << 16)
-#define GINTSTS_EOPF			(1 << 15)
-#define GINTSTS_ISOUTDROP		(1 << 14)
-#define GINTSTS_ENUMDONE		(1 << 13)
-#define GINTSTS_USBRST			(1 << 12)
-#define GINTSTS_USBSUSP			(1 << 11)
-#define GINTSTS_ERLYSUSP		(1 << 10)
-#define GINTSTS_I2CINT			(1 << 9)
-#define GINTSTS_ULPI_CK_INT		(1 << 8)
-#define GINTSTS_GOUTNAKEFF		(1 << 7)
-#define GINTSTS_GINNAKEFF		(1 << 6)
-#define GINTSTS_NPTXFEMP		(1 << 5)
-#define GINTSTS_RXFLVL			(1 << 4)
-#define GINTSTS_SOF			(1 << 3)
-#define GINTSTS_OTGINT			(1 << 2)
-#define GINTSTS_MODEMIS			(1 << 1)
-#define GINTSTS_CURMODE_HOST		(1 << 0)
+#define GINTSTS_WKUPINT			BIT(31)
+#define GINTSTS_SESSREQINT		BIT(30)
+#define GINTSTS_DISCONNINT		BIT(29)
+#define GINTSTS_CONIDSTSCHNG		BIT(28)
+#define GINTSTS_LPMTRANRCVD		BIT(27)
+#define GINTSTS_PTXFEMP			BIT(26)
+#define GINTSTS_HCHINT			BIT(25)
+#define GINTSTS_PRTINT			BIT(24)
+#define GINTSTS_RESETDET		BIT(23)
+#define GINTSTS_FET_SUSP		BIT(22)
+#define GINTSTS_INCOMPL_IP		BIT(21)
+#define GINTSTS_INCOMPL_SOOUT		BIT(21)
+#define GINTSTS_INCOMPL_SOIN		BIT(20)
+#define GINTSTS_OEPINT			BIT(19)
+#define GINTSTS_IEPINT			BIT(18)
+#define GINTSTS_EPMIS			BIT(17)
+#define GINTSTS_RESTOREDONE		BIT(16)
+#define GINTSTS_EOPF			BIT(15)
+#define GINTSTS_ISOUTDROP		BIT(14)
+#define GINTSTS_ENUMDONE		BIT(13)
+#define GINTSTS_USBRST			BIT(12)
+#define GINTSTS_USBSUSP			BIT(11)
+#define GINTSTS_ERLYSUSP		BIT(10)
+#define GINTSTS_I2CINT			BIT(9)
+#define GINTSTS_ULPI_CK_INT		BIT(8)
+#define GINTSTS_GOUTNAKEFF		BIT(7)
+#define GINTSTS_GINNAKEFF		BIT(6)
+#define GINTSTS_NPTXFEMP		BIT(5)
+#define GINTSTS_RXFLVL			BIT(4)
+#define GINTSTS_SOF			BIT(3)
+#define GINTSTS_OTGINT			BIT(2)
+#define GINTSTS_MODEMIS			BIT(1)
+#define GINTSTS_CURMODE_HOST		BIT(0)
 
 #define GRXSTSR				HSOTG_REG(0x01C)
 #define GRXSTSP				HSOTG_REG(0x020)
@@ -208,14 +208,14 @@
 #define GNPTXSTS_NP_TXF_SPC_AVAIL_GET(_v)	(((_v) >> 0) & 0xffff)
 
 #define GI2CCTL				HSOTG_REG(0x0030)
-#define GI2CCTL_BSYDNE			(1 << 31)
-#define GI2CCTL_RW			(1 << 30)
-#define GI2CCTL_I2CDATSE0		(1 << 28)
+#define GI2CCTL_BSYDNE			BIT(31)
+#define GI2CCTL_RW			BIT(30)
+#define GI2CCTL_I2CDATSE0		BIT(28)
 #define GI2CCTL_I2CDEVADDR_MASK		(0x3 << 26)
 #define GI2CCTL_I2CDEVADDR_SHIFT	26
-#define GI2CCTL_I2CSUSPCTL		(1 << 25)
-#define GI2CCTL_ACK			(1 << 24)
-#define GI2CCTL_I2CEN			(1 << 23)
+#define GI2CCTL_I2CSUSPCTL		BIT(25)
+#define GI2CCTL_ACK			BIT(24)
+#define GI2CCTL_I2CEN			BIT(23)
 #define GI2CCTL_ADDR_MASK		(0x7f << 16)
 #define GI2CCTL_ADDR_SHIFT		16
 #define GI2CCTL_REGADDR_MASK		(0xff << 8)
@@ -230,16 +230,16 @@
 #define GHWCFG1				HSOTG_REG(0x0044)
 
 #define GHWCFG2				HSOTG_REG(0x0048)
-#define GHWCFG2_OTG_ENABLE_IC_USB		(1 << 31)
+#define GHWCFG2_OTG_ENABLE_IC_USB		BIT(31)
 #define GHWCFG2_DEV_TOKEN_Q_DEPTH_MASK		(0x1f << 26)
 #define GHWCFG2_DEV_TOKEN_Q_DEPTH_SHIFT		26
 #define GHWCFG2_HOST_PERIO_TX_Q_DEPTH_MASK	(0x3 << 24)
 #define GHWCFG2_HOST_PERIO_TX_Q_DEPTH_SHIFT	24
 #define GHWCFG2_NONPERIO_TX_Q_DEPTH_MASK	(0x3 << 22)
 #define GHWCFG2_NONPERIO_TX_Q_DEPTH_SHIFT	22
-#define GHWCFG2_MULTI_PROC_INT			(1 << 20)
-#define GHWCFG2_DYNAMIC_FIFO			(1 << 19)
-#define GHWCFG2_PERIO_EP_SUPPORTED		(1 << 18)
+#define GHWCFG2_MULTI_PROC_INT			BIT(20)
+#define GHWCFG2_DYNAMIC_FIFO			BIT(19)
+#define GHWCFG2_PERIO_EP_SUPPORTED		BIT(18)
 #define GHWCFG2_NUM_HOST_CHAN_MASK		(0xf << 14)
 #define GHWCFG2_NUM_HOST_CHAN_SHIFT		14
 #define GHWCFG2_NUM_DEV_EP_MASK			(0xf << 10)
@@ -256,7 +256,7 @@
 #define GHWCFG2_HS_PHY_TYPE_UTMI		1
 #define GHWCFG2_HS_PHY_TYPE_ULPI		2
 #define GHWCFG2_HS_PHY_TYPE_UTMI_ULPI		3
-#define GHWCFG2_POINT2POINT			(1 << 5)
+#define GHWCFG2_POINT2POINT			BIT(5)
 #define GHWCFG2_ARCHITECTURE_MASK		(0x3 << 3)
 #define GHWCFG2_ARCHITECTURE_SHIFT		3
 #define GHWCFG2_SLAVE_ONLY_ARCH			0
@@ -276,32 +276,32 @@
 #define GHWCFG3				HSOTG_REG(0x004c)
 #define GHWCFG3_DFIFO_DEPTH_MASK		(0xffff << 16)
 #define GHWCFG3_DFIFO_DEPTH_SHIFT		16
-#define GHWCFG3_OTG_LPM_EN			(1 << 15)
-#define GHWCFG3_BC_SUPPORT			(1 << 14)
-#define GHWCFG3_OTG_ENABLE_HSIC			(1 << 13)
-#define GHWCFG3_ADP_SUPP			(1 << 12)
-#define GHWCFG3_SYNCH_RESET_TYPE		(1 << 11)
-#define GHWCFG3_OPTIONAL_FEATURES		(1 << 10)
-#define GHWCFG3_VENDOR_CTRL_IF			(1 << 9)
-#define GHWCFG3_I2C				(1 << 8)
-#define GHWCFG3_OTG_FUNC			(1 << 7)
+#define GHWCFG3_OTG_LPM_EN			BIT(15)
+#define GHWCFG3_BC_SUPPORT			BIT(14)
+#define GHWCFG3_OTG_ENABLE_HSIC			BIT(13)
+#define GHWCFG3_ADP_SUPP			BIT(12)
+#define GHWCFG3_SYNCH_RESET_TYPE		BIT(11)
+#define GHWCFG3_OPTIONAL_FEATURES		BIT(10)
+#define GHWCFG3_VENDOR_CTRL_IF			BIT(9)
+#define GHWCFG3_I2C				BIT(8)
+#define GHWCFG3_OTG_FUNC			BIT(7)
 #define GHWCFG3_PACKET_SIZE_CNTR_WIDTH_MASK	(0x7 << 4)
 #define GHWCFG3_PACKET_SIZE_CNTR_WIDTH_SHIFT	4
 #define GHWCFG3_XFER_SIZE_CNTR_WIDTH_MASK	(0xf << 0)
 #define GHWCFG3_XFER_SIZE_CNTR_WIDTH_SHIFT	0
 
 #define GHWCFG4				HSOTG_REG(0x0050)
-#define GHWCFG4_DESC_DMA_DYN			(1 << 31)
-#define GHWCFG4_DESC_DMA			(1 << 30)
+#define GHWCFG4_DESC_DMA_DYN			BIT(31)
+#define GHWCFG4_DESC_DMA			BIT(30)
 #define GHWCFG4_NUM_IN_EPS_MASK			(0xf << 26)
 #define GHWCFG4_NUM_IN_EPS_SHIFT		26
-#define GHWCFG4_DED_FIFO_EN			(1 << 25)
+#define GHWCFG4_DED_FIFO_EN			BIT(25)
 #define GHWCFG4_DED_FIFO_SHIFT		25
-#define GHWCFG4_SESSION_END_FILT_EN		(1 << 24)
-#define GHWCFG4_B_VALID_FILT_EN			(1 << 23)
-#define GHWCFG4_A_VALID_FILT_EN			(1 << 22)
-#define GHWCFG4_VBUS_VALID_FILT_EN		(1 << 21)
-#define GHWCFG4_IDDIG_FILT_EN			(1 << 20)
+#define GHWCFG4_SESSION_END_FILT_EN		BIT(24)
+#define GHWCFG4_B_VALID_FILT_EN			BIT(23)
+#define GHWCFG4_A_VALID_FILT_EN			BIT(22)
+#define GHWCFG4_VBUS_VALID_FILT_EN		BIT(21)
+#define GHWCFG4_IDDIG_FILT_EN			BIT(20)
 #define GHWCFG4_NUM_DEV_MODE_CTRL_EP_MASK	(0xf << 16)
 #define GHWCFG4_NUM_DEV_MODE_CTRL_EP_SHIFT	16
 #define GHWCFG4_UTMI_PHY_DATA_WIDTH_MASK	(0x3 << 14)
@@ -309,64 +309,64 @@
 #define GHWCFG4_UTMI_PHY_DATA_WIDTH_8		0
 #define GHWCFG4_UTMI_PHY_DATA_WIDTH_16		1
 #define GHWCFG4_UTMI_PHY_DATA_WIDTH_8_OR_16	2
-#define GHWCFG4_XHIBER				(1 << 7)
-#define GHWCFG4_HIBER				(1 << 6)
-#define GHWCFG4_MIN_AHB_FREQ			(1 << 5)
-#define GHWCFG4_POWER_OPTIMIZ			(1 << 4)
+#define GHWCFG4_XHIBER				BIT(7)
+#define GHWCFG4_HIBER				BIT(6)
+#define GHWCFG4_MIN_AHB_FREQ			BIT(5)
+#define GHWCFG4_POWER_OPTIMIZ			BIT(4)
 #define GHWCFG4_NUM_DEV_PERIO_IN_EP_MASK	(0xf << 0)
 #define GHWCFG4_NUM_DEV_PERIO_IN_EP_SHIFT	0
 
 #define GLPMCFG				HSOTG_REG(0x0054)
-#define GLPMCFG_INV_SEL_HSIC		(1 << 31)
-#define GLPMCFG_HSIC_CONNECT		(1 << 30)
+#define GLPMCFG_INV_SEL_HSIC		BIT(31)
+#define GLPMCFG_HSIC_CONNECT		BIT(30)
 #define GLPMCFG_RETRY_COUNT_STS_MASK	(0x7 << 25)
 #define GLPMCFG_RETRY_COUNT_STS_SHIFT	25
-#define GLPMCFG_SEND_LPM		(1 << 24)
+#define GLPMCFG_SEND_LPM		BIT(24)
 #define GLPMCFG_RETRY_COUNT_MASK	(0x7 << 21)
 #define GLPMCFG_RETRY_COUNT_SHIFT	21
 #define GLPMCFG_LPM_CHAN_INDEX_MASK	(0xf << 17)
 #define GLPMCFG_LPM_CHAN_INDEX_SHIFT	17
-#define GLPMCFG_SLEEP_STATE_RESUMEOK	(1 << 16)
-#define GLPMCFG_PRT_SLEEP_STS		(1 << 15)
+#define GLPMCFG_SLEEP_STATE_RESUMEOK	BIT(16)
+#define GLPMCFG_PRT_SLEEP_STS		BIT(15)
 #define GLPMCFG_LPM_RESP_MASK		(0x3 << 13)
 #define GLPMCFG_LPM_RESP_SHIFT		13
 #define GLPMCFG_HIRD_THRES_MASK		(0x1f << 8)
 #define GLPMCFG_HIRD_THRES_SHIFT	8
 #define GLPMCFG_HIRD_THRES_EN			(0x10 << 8)
-#define GLPMCFG_EN_UTMI_SLEEP		(1 << 7)
-#define GLPMCFG_REM_WKUP_EN		(1 << 6)
+#define GLPMCFG_EN_UTMI_SLEEP		BIT(7)
+#define GLPMCFG_REM_WKUP_EN		BIT(6)
 #define GLPMCFG_HIRD_MASK		(0xf << 2)
 #define GLPMCFG_HIRD_SHIFT		2
-#define GLPMCFG_APPL_RESP		(1 << 1)
-#define GLPMCFG_LPM_CAP_EN		(1 << 0)
+#define GLPMCFG_APPL_RESP		BIT(1)
+#define GLPMCFG_LPM_CAP_EN		BIT(0)
 
 #define GPWRDN				HSOTG_REG(0x0058)
 #define GPWRDN_MULT_VAL_ID_BC_MASK	(0x1f << 24)
 #define GPWRDN_MULT_VAL_ID_BC_SHIFT	24
-#define GPWRDN_ADP_INT			(1 << 23)
-#define GPWRDN_BSESSVLD			(1 << 22)
-#define GPWRDN_IDSTS			(1 << 21)
+#define GPWRDN_ADP_INT			BIT(23)
+#define GPWRDN_BSESSVLD			BIT(22)
+#define GPWRDN_IDSTS			BIT(21)
 #define GPWRDN_LINESTATE_MASK		(0x3 << 19)
 #define GPWRDN_LINESTATE_SHIFT		19
-#define GPWRDN_STS_CHGINT_MSK		(1 << 18)
-#define GPWRDN_STS_CHGINT		(1 << 17)
-#define GPWRDN_SRP_DET_MSK		(1 << 16)
-#define GPWRDN_SRP_DET			(1 << 15)
-#define GPWRDN_CONNECT_DET_MSK		(1 << 14)
-#define GPWRDN_CONNECT_DET		(1 << 13)
-#define GPWRDN_DISCONN_DET_MSK		(1 << 12)
-#define GPWRDN_DISCONN_DET		(1 << 11)
-#define GPWRDN_RST_DET_MSK		(1 << 10)
-#define GPWRDN_RST_DET			(1 << 9)
-#define GPWRDN_LNSTSCHG_MSK		(1 << 8)
-#define GPWRDN_LNSTSCHG			(1 << 7)
-#define GPWRDN_DIS_VBUS			(1 << 6)
-#define GPWRDN_PWRDNSWTCH		(1 << 5)
-#define GPWRDN_PWRDNRSTN		(1 << 4)
-#define GPWRDN_PWRDNCLMP		(1 << 3)
-#define GPWRDN_RESTORE			(1 << 2)
-#define GPWRDN_PMUACTV			(1 << 1)
-#define GPWRDN_PMUINTSEL		(1 << 0)
+#define GPWRDN_STS_CHGINT_MSK		BIT(18)
+#define GPWRDN_STS_CHGINT		BIT(17)
+#define GPWRDN_SRP_DET_MSK		BIT(16)
+#define GPWRDN_SRP_DET			BIT(15)
+#define GPWRDN_CONNECT_DET_MSK		BIT(14)
+#define GPWRDN_CONNECT_DET		BIT(13)
+#define GPWRDN_DISCONN_DET_MSK		BIT(12)
+#define GPWRDN_DISCONN_DET		BIT(11)
+#define GPWRDN_RST_DET_MSK		BIT(10)
+#define GPWRDN_RST_DET			BIT(9)
+#define GPWRDN_LNSTSCHG_MSK		BIT(8)
+#define GPWRDN_LNSTSCHG			BIT(7)
+#define GPWRDN_DIS_VBUS			BIT(6)
+#define GPWRDN_PWRDNSWTCH		BIT(5)
+#define GPWRDN_PWRDNRSTN		BIT(4)
+#define GPWRDN_PWRDNCLMP		BIT(3)
+#define GPWRDN_RESTORE			BIT(2)
+#define GPWRDN_PMUACTV			BIT(1)
+#define GPWRDN_PMUINTSEL		BIT(0)
 
 #define GDFIFOCFG			HSOTG_REG(0x005c)
 #define GDFIFOCFG_EPINFOBASE_MASK	(0xffff << 16)
@@ -377,16 +377,16 @@
 #define ADPCTL				HSOTG_REG(0x0060)
 #define ADPCTL_AR_MASK			(0x3 << 27)
 #define ADPCTL_AR_SHIFT			27
-#define ADPCTL_ADP_TMOUT_INT_MSK	(1 << 26)
-#define ADPCTL_ADP_SNS_INT_MSK		(1 << 25)
-#define ADPCTL_ADP_PRB_INT_MSK		(1 << 24)
-#define ADPCTL_ADP_TMOUT_INT		(1 << 23)
-#define ADPCTL_ADP_SNS_INT		(1 << 22)
-#define ADPCTL_ADP_PRB_INT		(1 << 21)
-#define ADPCTL_ADPENA			(1 << 20)
-#define ADPCTL_ADPRES			(1 << 19)
-#define ADPCTL_ENASNS			(1 << 18)
-#define ADPCTL_ENAPRB			(1 << 17)
+#define ADPCTL_ADP_TMOUT_INT_MSK	BIT(26)
+#define ADPCTL_ADP_SNS_INT_MSK		BIT(25)
+#define ADPCTL_ADP_PRB_INT_MSK		BIT(24)
+#define ADPCTL_ADP_TMOUT_INT		BIT(23)
+#define ADPCTL_ADP_SNS_INT		BIT(22)
+#define ADPCTL_ADP_PRB_INT		BIT(21)
+#define ADPCTL_ADPENA			BIT(20)
+#define ADPCTL_ADPRES			BIT(19)
+#define ADPCTL_ENASNS			BIT(18)
+#define ADPCTL_ENAPRB			BIT(17)
 #define ADPCTL_RTIM_MASK		(0x7ff << 6)
 #define ADPCTL_RTIM_SHIFT		6
 #define ADPCTL_PRB_PER_MASK		(0x3 << 4)
@@ -412,7 +412,7 @@
 /* Device mode registers */
 
 #define DCFG				HSOTG_REG(0x800)
-#define DCFG_DESCDMA_EN			(1 << 23)
+#define DCFG_DESCDMA_EN			BIT(23)
 #define DCFG_EPMISCNT_MASK		(0x1f << 18)
 #define DCFG_EPMISCNT_SHIFT		18
 #define DCFG_EPMISCNT_LIMIT		0x1f
@@ -425,7 +425,7 @@
 #define DCFG_DEVADDR_SHIFT		4
 #define DCFG_DEVADDR_LIMIT		0x7f
 #define DCFG_DEVADDR(_x)		((_x) << 4)
-#define DCFG_NZ_STS_OUT_HSHK		(1 << 2)
+#define DCFG_NZ_STS_OUT_HSHK		BIT(2)
 #define DCFG_DEVSPD_MASK		(0x3 << 0)
 #define DCFG_DEVSPD_SHIFT		0
 #define DCFG_DEVSPD_HS			0
@@ -434,54 +434,54 @@
 #define DCFG_DEVSPD_FS48		3
 
 #define DCTL				HSOTG_REG(0x804)
-#define DCTL_PWRONPRGDONE		(1 << 11)
-#define DCTL_CGOUTNAK			(1 << 10)
-#define DCTL_SGOUTNAK			(1 << 9)
-#define DCTL_CGNPINNAK			(1 << 8)
-#define DCTL_SGNPINNAK			(1 << 7)
+#define DCTL_PWRONPRGDONE		BIT(11)
+#define DCTL_CGOUTNAK			BIT(10)
+#define DCTL_SGOUTNAK			BIT(9)
+#define DCTL_CGNPINNAK			BIT(8)
+#define DCTL_SGNPINNAK			BIT(7)
 #define DCTL_TSTCTL_MASK		(0x7 << 4)
 #define DCTL_TSTCTL_SHIFT		4
-#define DCTL_GOUTNAKSTS			(1 << 3)
-#define DCTL_GNPINNAKSTS		(1 << 2)
-#define DCTL_SFTDISCON			(1 << 1)
-#define DCTL_RMTWKUPSIG			(1 << 0)
+#define DCTL_GOUTNAKSTS			BIT(3)
+#define DCTL_GNPINNAKSTS		BIT(2)
+#define DCTL_SFTDISCON			BIT(1)
+#define DCTL_RMTWKUPSIG			BIT(0)
 
 #define DSTS				HSOTG_REG(0x808)
 #define DSTS_SOFFN_MASK			(0x3fff << 8)
 #define DSTS_SOFFN_SHIFT		8
 #define DSTS_SOFFN_LIMIT		0x3fff
 #define DSTS_SOFFN(_x)			((_x) << 8)
-#define DSTS_ERRATICERR			(1 << 3)
+#define DSTS_ERRATICERR			BIT(3)
 #define DSTS_ENUMSPD_MASK		(0x3 << 1)
 #define DSTS_ENUMSPD_SHIFT		1
 #define DSTS_ENUMSPD_HS			0
 #define DSTS_ENUMSPD_FS			1
 #define DSTS_ENUMSPD_LS			2
 #define DSTS_ENUMSPD_FS48		3
-#define DSTS_SUSPSTS			(1 << 0)
+#define DSTS_SUSPSTS			BIT(0)
 
 #define DIEPMSK				HSOTG_REG(0x810)
-#define DIEPMSK_NAKMSK			(1 << 13)
-#define DIEPMSK_BNAININTRMSK		(1 << 9)
-#define DIEPMSK_TXFIFOUNDRNMSK		(1 << 8)
-#define DIEPMSK_TXFIFOEMPTY		(1 << 7)
-#define DIEPMSK_INEPNAKEFFMSK		(1 << 6)
-#define DIEPMSK_INTKNEPMISMSK		(1 << 5)
-#define DIEPMSK_INTKNTXFEMPMSK		(1 << 4)
-#define DIEPMSK_TIMEOUTMSK		(1 << 3)
-#define DIEPMSK_AHBERRMSK		(1 << 2)
-#define DIEPMSK_EPDISBLDMSK		(1 << 1)
-#define DIEPMSK_XFERCOMPLMSK		(1 << 0)
+#define DIEPMSK_NAKMSK			BIT(13)
+#define DIEPMSK_BNAININTRMSK		BIT(9)
+#define DIEPMSK_TXFIFOUNDRNMSK		BIT(8)
+#define DIEPMSK_TXFIFOEMPTY		BIT(7)
+#define DIEPMSK_INEPNAKEFFMSK		BIT(6)
+#define DIEPMSK_INTKNEPMISMSK		BIT(5)
+#define DIEPMSK_INTKNTXFEMPMSK		BIT(4)
+#define DIEPMSK_TIMEOUTMSK		BIT(3)
+#define DIEPMSK_AHBERRMSK		BIT(2)
+#define DIEPMSK_EPDISBLDMSK		BIT(1)
+#define DIEPMSK_XFERCOMPLMSK		BIT(0)
 
 #define DOEPMSK				HSOTG_REG(0x814)
-#define DOEPMSK_BNAMSK			(1 << 9)
-#define DOEPMSK_BACK2BACKSETUP		(1 << 6)
-#define DOEPMSK_STSPHSERCVDMSK		(1 << 5)
-#define DOEPMSK_OUTTKNEPDISMSK		(1 << 4)
-#define DOEPMSK_SETUPMSK		(1 << 3)
-#define DOEPMSK_AHBERRMSK		(1 << 2)
-#define DOEPMSK_EPDISBLDMSK		(1 << 1)
-#define DOEPMSK_XFERCOMPLMSK		(1 << 0)
+#define DOEPMSK_BNAMSK			BIT(9)
+#define DOEPMSK_BACK2BACKSETUP		BIT(6)
+#define DOEPMSK_STSPHSERCVDMSK		BIT(5)
+#define DOEPMSK_OUTTKNEPDISMSK		BIT(4)
+#define DOEPMSK_SETUPMSK		BIT(3)
+#define DOEPMSK_AHBERRMSK		BIT(2)
+#define DOEPMSK_EPDISBLDMSK		BIT(1)
+#define DOEPMSK_XFERCOMPLMSK		BIT(0)
 
 #define DAINT				HSOTG_REG(0x818)
 #define DAINTMSK			HSOTG_REG(0x81C)
@@ -516,30 +516,30 @@
 #define D0EPCTL_MPS_16			2
 #define D0EPCTL_MPS_8			3
 
-#define DXEPCTL_EPENA			(1 << 31)
-#define DXEPCTL_EPDIS			(1 << 30)
-#define DXEPCTL_SETD1PID		(1 << 29)
-#define DXEPCTL_SETODDFR		(1 << 29)
-#define DXEPCTL_SETD0PID		(1 << 28)
-#define DXEPCTL_SETEVENFR		(1 << 28)
-#define DXEPCTL_SNAK			(1 << 27)
-#define DXEPCTL_CNAK			(1 << 26)
+#define DXEPCTL_EPENA			BIT(31)
+#define DXEPCTL_EPDIS			BIT(30)
+#define DXEPCTL_SETD1PID		BIT(29)
+#define DXEPCTL_SETODDFR		BIT(29)
+#define DXEPCTL_SETD0PID		BIT(28)
+#define DXEPCTL_SETEVENFR		BIT(28)
+#define DXEPCTL_SNAK			BIT(27)
+#define DXEPCTL_CNAK			BIT(26)
 #define DXEPCTL_TXFNUM_MASK		(0xf << 22)
 #define DXEPCTL_TXFNUM_SHIFT		22
 #define DXEPCTL_TXFNUM_LIMIT		0xf
 #define DXEPCTL_TXFNUM(_x)		((_x) << 22)
-#define DXEPCTL_STALL			(1 << 21)
-#define DXEPCTL_SNP			(1 << 20)
+#define DXEPCTL_STALL			BIT(21)
+#define DXEPCTL_SNP			BIT(20)
 #define DXEPCTL_EPTYPE_MASK		(0x3 << 18)
 #define DXEPCTL_EPTYPE_CONTROL		(0x0 << 18)
 #define DXEPCTL_EPTYPE_ISO		(0x1 << 18)
 #define DXEPCTL_EPTYPE_BULK		(0x2 << 18)
 #define DXEPCTL_EPTYPE_INTERRUPT	(0x3 << 18)
 
-#define DXEPCTL_NAKSTS			(1 << 17)
-#define DXEPCTL_DPID			(1 << 16)
-#define DXEPCTL_EOFRNUM			(1 << 16)
-#define DXEPCTL_USBACTEP		(1 << 15)
+#define DXEPCTL_NAKSTS			BIT(17)
+#define DXEPCTL_DPID			BIT(16)
+#define DXEPCTL_EOFRNUM			BIT(16)
+#define DXEPCTL_USBACTEP		BIT(15)
 #define DXEPCTL_NEXTEP_MASK		(0xf << 11)
 #define DXEPCTL_NEXTEP_SHIFT		11
 #define DXEPCTL_NEXTEP_LIMIT		0xf
@@ -551,26 +551,26 @@
 
 #define DIEPINT(_a)			HSOTG_REG(0x908 + ((_a) * 0x20))
 #define DOEPINT(_a)			HSOTG_REG(0xB08 + ((_a) * 0x20))
-#define DXEPINT_SETUP_RCVD		(1 << 15)
-#define DXEPINT_NYETINTRPT		(1 << 14)
-#define DXEPINT_NAKINTRPT		(1 << 13)
-#define DXEPINT_BBLEERRINTRPT		(1 << 12)
-#define DXEPINT_PKTDRPSTS		(1 << 11)
-#define DXEPINT_BNAINTR			(1 << 9)
-#define DXEPINT_TXFIFOUNDRN		(1 << 8)
-#define DXEPINT_OUTPKTERR		(1 << 8)
-#define DXEPINT_TXFEMP			(1 << 7)
-#define DXEPINT_INEPNAKEFF		(1 << 6)
-#define DXEPINT_BACK2BACKSETUP		(1 << 6)
-#define DXEPINT_INTKNEPMIS		(1 << 5)
-#define DXEPINT_STSPHSERCVD		(1 << 5)
-#define DXEPINT_INTKNTXFEMP		(1 << 4)
-#define DXEPINT_OUTTKNEPDIS		(1 << 4)
-#define DXEPINT_TIMEOUT			(1 << 3)
-#define DXEPINT_SETUP			(1 << 3)
-#define DXEPINT_AHBERR			(1 << 2)
-#define DXEPINT_EPDISBLD		(1 << 1)
-#define DXEPINT_XFERCOMPL		(1 << 0)
+#define DXEPINT_SETUP_RCVD		BIT(15)
+#define DXEPINT_NYETINTRPT		BIT(14)
+#define DXEPINT_NAKINTRPT		BIT(13)
+#define DXEPINT_BBLEERRINTRPT		BIT(12)
+#define DXEPINT_PKTDRPSTS		BIT(11)
+#define DXEPINT_BNAINTR			BIT(9)
+#define DXEPINT_TXFIFOUNDRN		BIT(8)
+#define DXEPINT_OUTPKTERR		BIT(8)
+#define DXEPINT_TXFEMP			BIT(7)
+#define DXEPINT_INEPNAKEFF		BIT(6)
+#define DXEPINT_BACK2BACKSETUP		BIT(6)
+#define DXEPINT_INTKNEPMIS		BIT(5)
+#define DXEPINT_STSPHSERCVD		BIT(5)
+#define DXEPINT_INTKNTXFEMP		BIT(4)
+#define DXEPINT_OUTTKNEPDIS		BIT(4)
+#define DXEPINT_TIMEOUT			BIT(3)
+#define DXEPINT_SETUP			BIT(3)
+#define DXEPINT_AHBERR			BIT(2)
+#define DXEPINT_EPDISBLD		BIT(1)
+#define DXEPINT_XFERCOMPL		BIT(0)
 
 #define DIEPTSIZ0			HSOTG_REG(0x910)
 #define DIEPTSIZ0_PKTCNT_MASK		(0x3 << 19)
@@ -587,7 +587,7 @@
 #define DOEPTSIZ0_SUPCNT_SHIFT		29
 #define DOEPTSIZ0_SUPCNT_LIMIT		0x3
 #define DOEPTSIZ0_SUPCNT(_x)		((_x) << 29)
-#define DOEPTSIZ0_PKTCNT		(1 << 19)
+#define DOEPTSIZ0_PKTCNT		BIT(19)
 #define DOEPTSIZ0_XFERSIZE_MASK		(0x7f << 0)
 #define DOEPTSIZ0_XFERSIZE_SHIFT	0
 
@@ -614,55 +614,55 @@
 #define DTXFSTS(_a)			HSOTG_REG(0x918 + ((_a) * 0x20))
 
 #define PCGCTL				HSOTG_REG(0x0e00)
-#define PCGCTL_IF_DEV_MODE		(1 << 31)
+#define PCGCTL_IF_DEV_MODE		BIT(31)
 #define PCGCTL_P2HD_PRT_SPD_MASK	(0x3 << 29)
 #define PCGCTL_P2HD_PRT_SPD_SHIFT	29
 #define PCGCTL_P2HD_DEV_ENUM_SPD_MASK	(0x3 << 27)
 #define PCGCTL_P2HD_DEV_ENUM_SPD_SHIFT	27
 #define PCGCTL_MAC_DEV_ADDR_MASK	(0x7f << 20)
 #define PCGCTL_MAC_DEV_ADDR_SHIFT	20
-#define PCGCTL_MAX_TERMSEL		(1 << 19)
+#define PCGCTL_MAX_TERMSEL		BIT(19)
 #define PCGCTL_MAX_XCVRSELECT_MASK	(0x3 << 17)
 #define PCGCTL_MAX_XCVRSELECT_SHIFT	17
-#define PCGCTL_PORT_POWER		(1 << 16)
+#define PCGCTL_PORT_POWER		BIT(16)
 #define PCGCTL_PRT_CLK_SEL_MASK		(0x3 << 14)
 #define PCGCTL_PRT_CLK_SEL_SHIFT	14
-#define PCGCTL_ESS_REG_RESTORED		(1 << 13)
-#define PCGCTL_EXTND_HIBER_SWITCH	(1 << 12)
-#define PCGCTL_EXTND_HIBER_PWRCLMP	(1 << 11)
-#define PCGCTL_ENBL_EXTND_HIBER		(1 << 10)
-#define PCGCTL_RESTOREMODE		(1 << 9)
-#define PCGCTL_RESETAFTSUSP		(1 << 8)
-#define PCGCTL_DEEP_SLEEP		(1 << 7)
-#define PCGCTL_PHY_IN_SLEEP		(1 << 6)
-#define PCGCTL_ENBL_SLEEP_GATING	(1 << 5)
-#define PCGCTL_RSTPDWNMODULE		(1 << 3)
-#define PCGCTL_PWRCLMP			(1 << 2)
-#define PCGCTL_GATEHCLK			(1 << 1)
-#define PCGCTL_STOPPCLK			(1 << 0)
+#define PCGCTL_ESS_REG_RESTORED		BIT(13)
+#define PCGCTL_EXTND_HIBER_SWITCH	BIT(12)
+#define PCGCTL_EXTND_HIBER_PWRCLMP	BIT(11)
+#define PCGCTL_ENBL_EXTND_HIBER		BIT(10)
+#define PCGCTL_RESTOREMODE		BIT(9)
+#define PCGCTL_RESETAFTSUSP		BIT(8)
+#define PCGCTL_DEEP_SLEEP		BIT(7)
+#define PCGCTL_PHY_IN_SLEEP		BIT(6)
+#define PCGCTL_ENBL_SLEEP_GATING	BIT(5)
+#define PCGCTL_RSTPDWNMODULE		BIT(3)
+#define PCGCTL_PWRCLMP			BIT(2)
+#define PCGCTL_GATEHCLK			BIT(1)
+#define PCGCTL_STOPPCLK			BIT(0)
 
 #define EPFIFO(_a)			HSOTG_REG(0x1000 + ((_a) * 0x1000))
 
 /* Host Mode Registers */
 
 #define HCFG				HSOTG_REG(0x0400)
-#define HCFG_MODECHTIMEN		(1 << 31)
-#define HCFG_PERSCHEDENA		(1 << 26)
+#define HCFG_MODECHTIMEN		BIT(31)
+#define HCFG_PERSCHEDENA		BIT(26)
 #define HCFG_FRLISTEN_MASK		(0x3 << 24)
 #define HCFG_FRLISTEN_SHIFT		24
 #define HCFG_FRLISTEN_8				(0 << 24)
 #define FRLISTEN_8_SIZE				8
-#define HCFG_FRLISTEN_16			(1 << 24)
+#define HCFG_FRLISTEN_16			BIT(24)
 #define FRLISTEN_16_SIZE			16
 #define HCFG_FRLISTEN_32			(2 << 24)
 #define FRLISTEN_32_SIZE			32
 #define HCFG_FRLISTEN_64			(3 << 24)
 #define FRLISTEN_64_SIZE			64
-#define HCFG_DESCDMA			(1 << 23)
+#define HCFG_DESCDMA			BIT(23)
 #define HCFG_RESVALID_MASK		(0xff << 8)
 #define HCFG_RESVALID_SHIFT		8
-#define HCFG_ENA32KHZ			(1 << 7)
-#define HCFG_FSLSSUPP			(1 << 2)
+#define HCFG_ENA32KHZ			BIT(7)
+#define HCFG_FSLSSUPP			BIT(2)
 #define HCFG_FSLSPCLKSEL_MASK		(0x3 << 0)
 #define HCFG_FSLSPCLKSEL_SHIFT		0
 #define HCFG_FSLSPCLKSEL_30_60_MHZ	0
@@ -672,7 +672,7 @@
 #define HFIR				HSOTG_REG(0x0404)
 #define HFIR_FRINT_MASK			(0xffff << 0)
 #define HFIR_FRINT_SHIFT		0
-#define HFIR_RLDCTRL			(1 << 16)
+#define HFIR_RLDCTRL			BIT(16)
 
 #define HFNUM				HSOTG_REG(0x0408)
 #define HFNUM_FRREM_MASK		(0xffff << 16)
@@ -682,12 +682,12 @@
 #define HFNUM_MAX_FRNUM			0x3fff
 
 #define HPTXSTS				HSOTG_REG(0x0410)
-#define TXSTS_QTOP_ODD			(1 << 31)
+#define TXSTS_QTOP_ODD			BIT(31)
 #define TXSTS_QTOP_CHNEP_MASK		(0xf << 27)
 #define TXSTS_QTOP_CHNEP_SHIFT		27
 #define TXSTS_QTOP_TOKEN_MASK		(0x3 << 25)
 #define TXSTS_QTOP_TOKEN_SHIFT		25
-#define TXSTS_QTOP_TERMINATE		(1 << 24)
+#define TXSTS_QTOP_TERMINATE		BIT(24)
 #define TXSTS_QSPCAVAIL_MASK		(0xff << 16)
 #define TXSTS_QSPCAVAIL_SHIFT		16
 #define TXSTS_FSPCAVAIL_MASK		(0xffff << 0)
@@ -705,39 +705,39 @@
 #define HPRT0_SPD_LOW_SPEED		2
 #define HPRT0_TSTCTL_MASK		(0xf << 13)
 #define HPRT0_TSTCTL_SHIFT		13
-#define HPRT0_PWR			(1 << 12)
+#define HPRT0_PWR			BIT(12)
 #define HPRT0_LNSTS_MASK		(0x3 << 10)
 #define HPRT0_LNSTS_SHIFT		10
-#define HPRT0_RST			(1 << 8)
-#define HPRT0_SUSP			(1 << 7)
-#define HPRT0_RES			(1 << 6)
-#define HPRT0_OVRCURRCHG		(1 << 5)
-#define HPRT0_OVRCURRACT		(1 << 4)
-#define HPRT0_ENACHG			(1 << 3)
-#define HPRT0_ENA			(1 << 2)
-#define HPRT0_CONNDET			(1 << 1)
-#define HPRT0_CONNSTS			(1 << 0)
+#define HPRT0_RST			BIT(8)
+#define HPRT0_SUSP			BIT(7)
+#define HPRT0_RES			BIT(6)
+#define HPRT0_OVRCURRCHG		BIT(5)
+#define HPRT0_OVRCURRACT		BIT(4)
+#define HPRT0_ENACHG			BIT(3)
+#define HPRT0_ENA			BIT(2)
+#define HPRT0_CONNDET			BIT(1)
+#define HPRT0_CONNSTS			BIT(0)
 
 #define HCCHAR(_ch)			HSOTG_REG(0x0500 + 0x20 * (_ch))
-#define HCCHAR_CHENA			(1 << 31)
-#define HCCHAR_CHDIS			(1 << 30)
-#define HCCHAR_ODDFRM			(1 << 29)
+#define HCCHAR_CHENA			BIT(31)
+#define HCCHAR_CHDIS			BIT(30)
+#define HCCHAR_ODDFRM			BIT(29)
 #define HCCHAR_DEVADDR_MASK		(0x7f << 22)
 #define HCCHAR_DEVADDR_SHIFT		22
 #define HCCHAR_MULTICNT_MASK		(0x3 << 20)
 #define HCCHAR_MULTICNT_SHIFT		20
 #define HCCHAR_EPTYPE_MASK		(0x3 << 18)
 #define HCCHAR_EPTYPE_SHIFT		18
-#define HCCHAR_LSPDDEV			(1 << 17)
-#define HCCHAR_EPDIR			(1 << 15)
+#define HCCHAR_LSPDDEV			BIT(17)
+#define HCCHAR_EPDIR			BIT(15)
 #define HCCHAR_EPNUM_MASK		(0xf << 11)
 #define HCCHAR_EPNUM_SHIFT		11
 #define HCCHAR_MPS_MASK			(0x7ff << 0)
 #define HCCHAR_MPS_SHIFT		0
 
 #define HCSPLT(_ch)			HSOTG_REG(0x0504 + 0x20 * (_ch))
-#define HCSPLT_SPLTENA			(1 << 31)
-#define HCSPLT_COMPSPLT			(1 << 16)
+#define HCSPLT_SPLTENA			BIT(31)
+#define HCSPLT_COMPSPLT			BIT(16)
 #define HCSPLT_XACTPOS_MASK		(0x3 << 14)
 #define HCSPLT_XACTPOS_SHIFT		14
 #define HCSPLT_XACTPOS_MID		0
@@ -752,23 +752,23 @@
 #define HCINT(_ch)			HSOTG_REG(0x0508 + 0x20 * (_ch))
 #define HCINTMSK(_ch)			HSOTG_REG(0x050c + 0x20 * (_ch))
 #define HCINTMSK_RESERVED14_31		(0x3ffff << 14)
-#define HCINTMSK_FRM_LIST_ROLL		(1 << 13)
-#define HCINTMSK_XCS_XACT		(1 << 12)
-#define HCINTMSK_BNA			(1 << 11)
-#define HCINTMSK_DATATGLERR		(1 << 10)
-#define HCINTMSK_FRMOVRUN		(1 << 9)
-#define HCINTMSK_BBLERR			(1 << 8)
-#define HCINTMSK_XACTERR		(1 << 7)
-#define HCINTMSK_NYET			(1 << 6)
-#define HCINTMSK_ACK			(1 << 5)
-#define HCINTMSK_NAK			(1 << 4)
-#define HCINTMSK_STALL			(1 << 3)
-#define HCINTMSK_AHBERR			(1 << 2)
-#define HCINTMSK_CHHLTD			(1 << 1)
-#define HCINTMSK_XFERCOMPL		(1 << 0)
+#define HCINTMSK_FRM_LIST_ROLL		BIT(13)
+#define HCINTMSK_XCS_XACT		BIT(12)
+#define HCINTMSK_BNA			BIT(11)
+#define HCINTMSK_DATATGLERR		BIT(10)
+#define HCINTMSK_FRMOVRUN		BIT(9)
+#define HCINTMSK_BBLERR			BIT(8)
+#define HCINTMSK_XACTERR		BIT(7)
+#define HCINTMSK_NYET			BIT(6)
+#define HCINTMSK_ACK			BIT(5)
+#define HCINTMSK_NAK			BIT(4)
+#define HCINTMSK_STALL			BIT(3)
+#define HCINTMSK_AHBERR			BIT(2)
+#define HCINTMSK_CHHLTD			BIT(1)
+#define HCINTMSK_XFERCOMPL		BIT(0)
 
 #define HCTSIZ(_ch)			HSOTG_REG(0x0510 + 0x20 * (_ch))
-#define TSIZ_DOPNG			(1 << 31)
+#define TSIZ_DOPNG			BIT(31)
 #define TSIZ_SC_MC_PID_MASK		(0x3 << 29)
 #define TSIZ_SC_MC_PID_SHIFT		29
 #define TSIZ_SC_MC_PID_DATA0		0
@@ -808,14 +808,14 @@ struct dwc2_dma_desc {
 
 /* Host Mode DMA descriptor status quadlet */
 
-#define HOST_DMA_A			(1 << 31)
+#define HOST_DMA_A			BIT(31)
 #define HOST_DMA_STS_MASK		(0x3 << 28)
 #define HOST_DMA_STS_SHIFT		28
-#define HOST_DMA_STS_PKTERR		(1 << 28)
-#define HOST_DMA_EOL			(1 << 26)
-#define HOST_DMA_IOC			(1 << 25)
-#define HOST_DMA_SUP			(1 << 24)
-#define HOST_DMA_ALT_QTD		(1 << 23)
+#define HOST_DMA_STS_PKTERR		BIT(28)
+#define HOST_DMA_EOL			BIT(26)
+#define HOST_DMA_IOC			BIT(25)
+#define HOST_DMA_SUP			BIT(24)
+#define HOST_DMA_ALT_QTD		BIT(23)
 #define HOST_DMA_QTD_OFFSET_MASK	(0x3f << 17)
 #define HOST_DMA_QTD_OFFSET_SHIFT	17
 #define HOST_DMA_ISOC_NBYTES_MASK	(0xfff << 0)
@@ -837,11 +837,11 @@ struct dwc2_dma_desc {
 #define DEV_DMA_STS_SUCC		0
 #define DEV_DMA_STS_BUFF_FLUSH		1
 #define DEV_DMA_STS_BUFF_ERR		3
-#define DEV_DMA_L			(1 << 27)
-#define DEV_DMA_SHORT			(1 << 26)
-#define DEV_DMA_IOC			(1 << 25)
-#define DEV_DMA_SR			(1 << 24)
-#define DEV_DMA_MTRF			(1 << 23)
+#define DEV_DMA_L			BIT(27)
+#define DEV_DMA_SHORT			BIT(26)
+#define DEV_DMA_IOC			BIT(25)
+#define DEV_DMA_SR			BIT(24)
+#define DEV_DMA_MTRF			BIT(23)
 #define DEV_DMA_ISOC_PID_MASK		(0x3 << 23)
 #define DEV_DMA_ISOC_PID_SHIFT		23
 #define DEV_DMA_ISOC_PID_DATA0		0
diff --git a/drivers/usb/dwc2/params.c b/drivers/usb/dwc2/params.c
index bcd1e19b4076..2990c347289f 100644
--- a/drivers/usb/dwc2/params.c
+++ b/drivers/usb/dwc2/params.c
@@ -38,1157 +38,499 @@
 
 #include "core.h"
 
-static const struct dwc2_core_params params_hi6220 = {
-	.otg_cap			= 2,	/* No HNP/SRP capable */
-	.otg_ver			= 0,	/* 1.3 */
-	.dma_desc_enable		= 0,
-	.dma_desc_fs_enable		= 0,
-	.speed				= 0,	/* High Speed */
-	.enable_dynamic_fifo		= 1,
-	.en_multiple_tx_fifo		= 1,
-	.host_rx_fifo_size		= 512,
-	.host_nperio_tx_fifo_size	= 512,
-	.host_perio_tx_fifo_size	= 512,
-	.max_transfer_size		= 65535,
-	.max_packet_count		= 511,
-	.host_channels			= 16,
-	.phy_type			= 1,	/* UTMI */
-	.phy_utmi_width			= 8,
-	.phy_ulpi_ddr			= 0,	/* Single */
-	.phy_ulpi_ext_vbus		= 0,
-	.i2c_enable			= 0,
-	.ulpi_fs_ls			= 0,
-	.host_support_fs_ls_low_power	= 0,
-	.host_ls_low_power_phy_clk	= 0,	/* 48 MHz */
-	.ts_dline			= 0,
-	.reload_ctl			= 0,
-	.ahbcfg				= GAHBCFG_HBSTLEN_INCR16 <<
-					  GAHBCFG_HBSTLEN_SHIFT,
-	.uframe_sched			= 0,
-	.external_id_pin_ctl		= -1,
-	.hibernation			= -1,
-};
-
-static const struct dwc2_core_params params_bcm2835 = {
-	.otg_cap			= 0,	/* HNP/SRP capable */
-	.otg_ver			= 0,	/* 1.3 */
-	.dma_desc_enable		= 0,
-	.dma_desc_fs_enable		= 0,
-	.speed				= 0,	/* High Speed */
-	.enable_dynamic_fifo		= 1,
-	.en_multiple_tx_fifo		= 1,
-	.host_rx_fifo_size		= 774,	/* 774 DWORDs */
-	.host_nperio_tx_fifo_size	= 256,	/* 256 DWORDs */
-	.host_perio_tx_fifo_size	= 512,	/* 512 DWORDs */
-	.max_transfer_size		= 65535,
-	.max_packet_count		= 511,
-	.host_channels			= 8,
-	.phy_type			= 1,	/* UTMI */
-	.phy_utmi_width			= 8,	/* 8 bits */
-	.phy_ulpi_ddr			= 0,	/* Single */
-	.phy_ulpi_ext_vbus		= 0,
-	.i2c_enable			= 0,
-	.ulpi_fs_ls			= 0,
-	.host_support_fs_ls_low_power	= 0,
-	.host_ls_low_power_phy_clk	= 0,	/* 48 MHz */
-	.ts_dline			= 0,
-	.reload_ctl			= 0,
-	.ahbcfg				= 0x10,
-	.uframe_sched			= 0,
-	.external_id_pin_ctl		= -1,
-	.hibernation			= -1,
-};
-
-static const struct dwc2_core_params params_rk3066 = {
-	.otg_cap			= 2,	/* non-HNP/non-SRP */
-	.otg_ver			= -1,
-	.dma_desc_enable		= 0,
-	.dma_desc_fs_enable		= 0,
-	.speed				= -1,
-	.enable_dynamic_fifo		= 1,
-	.en_multiple_tx_fifo		= -1,
-	.host_rx_fifo_size		= 525,	/* 525 DWORDs */
-	.host_nperio_tx_fifo_size	= 128,	/* 128 DWORDs */
-	.host_perio_tx_fifo_size	= 256,	/* 256 DWORDs */
-	.max_transfer_size		= -1,
-	.max_packet_count		= -1,
-	.host_channels			= -1,
-	.phy_type			= -1,
-	.phy_utmi_width			= -1,
-	.phy_ulpi_ddr			= -1,
-	.phy_ulpi_ext_vbus		= -1,
-	.i2c_enable			= -1,
-	.ulpi_fs_ls			= -1,
-	.host_support_fs_ls_low_power	= -1,
-	.host_ls_low_power_phy_clk	= -1,
-	.ts_dline			= -1,
-	.reload_ctl			= -1,
-	.ahbcfg				= GAHBCFG_HBSTLEN_INCR16 <<
-					  GAHBCFG_HBSTLEN_SHIFT,
-	.uframe_sched			= -1,
-	.external_id_pin_ctl		= -1,
-	.hibernation			= -1,
-};
-
-static const struct dwc2_core_params params_ltq = {
-	.otg_cap			= 2,	/* non-HNP/non-SRP */
-	.otg_ver			= -1,
-	.dma_desc_enable		= -1,
-	.dma_desc_fs_enable		= -1,
-	.speed				= -1,
-	.enable_dynamic_fifo		= -1,
-	.en_multiple_tx_fifo		= -1,
-	.host_rx_fifo_size		= 288,	/* 288 DWORDs */
-	.host_nperio_tx_fifo_size	= 128,	/* 128 DWORDs */
-	.host_perio_tx_fifo_size	= 96,	/* 96 DWORDs */
-	.max_transfer_size		= 65535,
-	.max_packet_count		= 511,
-	.host_channels			= -1,
-	.phy_type			= -1,
-	.phy_utmi_width			= -1,
-	.phy_ulpi_ddr			= -1,
-	.phy_ulpi_ext_vbus		= -1,
-	.i2c_enable			= -1,
-	.ulpi_fs_ls			= -1,
-	.host_support_fs_ls_low_power	= -1,
-	.host_ls_low_power_phy_clk	= -1,
-	.ts_dline			= -1,
-	.reload_ctl			= -1,
-	.ahbcfg				= GAHBCFG_HBSTLEN_INCR16 <<
-					  GAHBCFG_HBSTLEN_SHIFT,
-	.uframe_sched			= -1,
-	.external_id_pin_ctl		= -1,
-	.hibernation			= -1,
-};
-
-static const struct dwc2_core_params params_amlogic = {
-	.otg_cap			= DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE,
-	.otg_ver			= -1,
-	.dma_desc_enable		= 0,
-	.dma_desc_fs_enable		= 0,
-	.speed				= DWC2_SPEED_PARAM_HIGH,
-	.enable_dynamic_fifo		= 1,
-	.en_multiple_tx_fifo		= -1,
-	.host_rx_fifo_size		= 512,
-	.host_nperio_tx_fifo_size	= 500,
-	.host_perio_tx_fifo_size	= 500,
-	.max_transfer_size		= -1,
-	.max_packet_count		= -1,
-	.host_channels			= 16,
-	.phy_type			= DWC2_PHY_TYPE_PARAM_UTMI,
-	.phy_utmi_width			= -1,
-	.phy_ulpi_ddr			= -1,
-	.phy_ulpi_ext_vbus		= -1,
-	.i2c_enable			= -1,
-	.ulpi_fs_ls			= -1,
-	.host_support_fs_ls_low_power	= -1,
-	.host_ls_low_power_phy_clk	= -1,
-	.ts_dline			= -1,
-	.reload_ctl			= 1,
-	.ahbcfg				= GAHBCFG_HBSTLEN_INCR8 <<
-					  GAHBCFG_HBSTLEN_SHIFT,
-	.uframe_sched			= 0,
-	.external_id_pin_ctl		= -1,
-	.hibernation			= -1,
-};
-
-static const struct dwc2_core_params params_default = {
-	.otg_cap			= -1,
-	.otg_ver			= -1,
-
-	/*
-	 * Disable descriptor dma mode by default as the HW can support
-	 * it, but does not support it for SPLIT transactions.
-	 * Disable it for FS devices as well.
-	 */
-	.dma_desc_enable		= 0,
-	.dma_desc_fs_enable		= 0,
-
-	.speed				= -1,
-	.enable_dynamic_fifo		= -1,
-	.en_multiple_tx_fifo		= -1,
-	.host_rx_fifo_size		= -1,
-	.host_nperio_tx_fifo_size	= -1,
-	.host_perio_tx_fifo_size	= -1,
-	.max_transfer_size		= -1,
-	.max_packet_count		= -1,
-	.host_channels			= -1,
-	.phy_type			= -1,
-	.phy_utmi_width			= -1,
-	.phy_ulpi_ddr			= -1,
-	.phy_ulpi_ext_vbus		= -1,
-	.i2c_enable			= -1,
-	.ulpi_fs_ls			= -1,
-	.host_support_fs_ls_low_power	= -1,
-	.host_ls_low_power_phy_clk	= -1,
-	.ts_dline			= -1,
-	.reload_ctl			= -1,
-	.ahbcfg				= -1,
-	.uframe_sched			= -1,
-	.external_id_pin_ctl		= -1,
-	.hibernation			= -1,
-};
-
-const struct of_device_id dwc2_of_match_table[] = {
-	{ .compatible = "brcm,bcm2835-usb", .data = &params_bcm2835 },
-	{ .compatible = "hisilicon,hi6220-usb", .data = &params_hi6220 },
-	{ .compatible = "rockchip,rk3066-usb", .data = &params_rk3066 },
-	{ .compatible = "lantiq,arx100-usb", .data = &params_ltq },
-	{ .compatible = "lantiq,xrx200-usb", .data = &params_ltq },
-	{ .compatible = "snps,dwc2", .data = NULL },
-	{ .compatible = "samsung,s3c6400-hsotg", .data = NULL},
-	{ .compatible = "amlogic,meson8b-usb", .data = &params_amlogic },
-	{ .compatible = "amlogic,meson-gxbb-usb", .data = &params_amlogic },
-	{ .compatible = "amcc,dwc-otg", .data = NULL },
-	{},
-};
-MODULE_DEVICE_TABLE(of, dwc2_of_match_table);
-
-static void dwc2_get_device_property(struct dwc2_hsotg *hsotg,
-				     char *property, u8 size, u64 *value)
+static void dwc2_set_bcm_params(struct dwc2_hsotg *hsotg)
 {
-	u32 val32;
-
-	switch (size) {
-	case 0:
-		*value = device_property_read_bool(hsotg->dev, property);
-		break;
-	case 1:
-	case 2:
-	case 4:
-		if (device_property_read_u32(hsotg->dev, property, &val32))
-			return;
-
-		*value = val32;
-		break;
-	case 8:
-		if (device_property_read_u64(hsotg->dev, property, value))
-			return;
+	struct dwc2_core_params *p = &hsotg->params;
 
-		break;
-	default:
-		/*
-		 * The size is checked by the only function that calls
-		 * this so this should never happen.
-		 */
-		WARN_ON(1);
-		return;
-	}
+	p->host_rx_fifo_size = 774;
+	p->max_transfer_size = 65535;
+	p->max_packet_count = 511;
+	p->ahbcfg = 0x10;
+	p->uframe_sched = false;
 }
 
-static void dwc2_set_core_param(void *param, u8 size, u64 value)
+static void dwc2_set_his_params(struct dwc2_hsotg *hsotg)
 {
-	switch (size) {
-	case 0:
-		*((bool *)param) = !!value;
-		break;
-	case 1:
-		*((u8 *)param) = (u8)value;
-		break;
-	case 2:
-		*((u16 *)param) = (u16)value;
-		break;
-	case 4:
-		*((u32 *)param) = (u32)value;
-		break;
-	case 8:
-		*((u64 *)param) = (u64)value;
-		break;
-	default:
-		/*
-		 * The size is checked by the only function that calls
-		 * this so this should never happen.
-		 */
-		WARN_ON(1);
-		return;
-	}
-}
+	struct dwc2_core_params *p = &hsotg->params;
 
-/**
- * dwc2_set_param() - Set a core parameter
- *
- * @hsotg: Programming view of the DWC_otg controller
- * @param: Pointer to the parameter to set
- * @lookup: True if the property should be looked up
- * @property: The device property to read
- * @legacy: The param value to set if @property is not available. This
- *          will typically be the legacy value set in the static
- *          params structure.
- * @def: The default value
- * @min: The minimum value
- * @max: The maximum value
- * @size: The size of the core parameter in bytes, or 0 for bool.
- *
- * This function looks up @property and sets the @param to that value.
- * If the property doesn't exist it uses the passed-in @value. It will
- * verify that the value falls between @min and @max. If it doesn't,
- * it will output an error and set the parameter to either @def or,
- * failing that, to @min.
- *
- * The @size is used to write to @param and to query the device
- * properties so that this same function can be used with different
- * types of parameters.
- */
-static void dwc2_set_param(struct dwc2_hsotg *hsotg, void *param,
-			   bool lookup, char *property, u64 legacy,
-			   u64 def, u64 min, u64 max, u8 size)
+	p->otg_cap = DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE;
+	p->speed = DWC2_SPEED_PARAM_HIGH;
+	p->host_rx_fifo_size = 512;
+	p->host_nperio_tx_fifo_size = 512;
+	p->host_perio_tx_fifo_size = 512;
+	p->max_transfer_size = 65535;
+	p->max_packet_count = 511;
+	p->host_channels = 16;
+	p->phy_type = DWC2_PHY_TYPE_PARAM_UTMI;
+	p->phy_utmi_width = 8;
+	p->i2c_enable = false;
+	p->reload_ctl = false;
+	p->ahbcfg = GAHBCFG_HBSTLEN_INCR16 <<
+		GAHBCFG_HBSTLEN_SHIFT;
+	p->uframe_sched = false;
+	p->change_speed_quirk = true;
+}
+
+static void dwc2_set_rk_params(struct dwc2_hsotg *hsotg)
 {
-	u64 sizemax;
-	u64 value;
-
-	if (WARN_ON(!hsotg || !param || !property))
-		return;
-
-	if (WARN((size > 8) || ((size & (size - 1)) != 0),
-		 "Invalid size %d for %s\n", size, property))
-		return;
-
-	dev_vdbg(hsotg->dev, "%s: Setting %s: legacy=%llu, def=%llu, min=%llu, max=%llu, size=%d\n",
-		 __func__, property, legacy, def, min, max, size);
-
-	sizemax = (1ULL << (size * 8)) - 1;
-	value = legacy;
-
-	/* Override legacy settings. */
-	if (lookup)
-		dwc2_get_device_property(hsotg, property, size, &value);
-
-	/*
-	 * While the value is not valid, try setting it to the default
-	 * value, and failing that, set it to the minimum.
-	 */
-	while ((value < min) || (value > max)) {
-		/* Print an error unless the value is set to auto. */
-		if (value != sizemax)
-			dev_err(hsotg->dev, "Invalid value %llu for param %s\n",
-				value, property);
+	struct dwc2_core_params *p = &hsotg->params;
 
-		/*
-		 * If we are already the default, just set it to the
-		 * minimum.
-		 */
-		if (value == def) {
-			dev_vdbg(hsotg->dev, "%s: setting value to min=%llu\n",
-				 __func__, min);
-			value = min;
-			break;
-		}
+	p->otg_cap = DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE;
+	p->host_rx_fifo_size = 525;
+	p->host_nperio_tx_fifo_size = 128;
+	p->host_perio_tx_fifo_size = 256;
+	p->ahbcfg = GAHBCFG_HBSTLEN_INCR16 <<
+		GAHBCFG_HBSTLEN_SHIFT;
+}
 
-		/* Try the default value */
-		dev_vdbg(hsotg->dev, "%s: setting value to default=%llu\n",
-			 __func__, def);
-		value = def;
-	}
+static void dwc2_set_ltq_params(struct dwc2_hsotg *hsotg)
+{
+	struct dwc2_core_params *p = &hsotg->params;
 
-	dev_dbg(hsotg->dev, "Setting %s to %llu\n", property, value);
-	dwc2_set_core_param(param, size, value);
+	p->otg_cap = 2;
+	p->host_rx_fifo_size = 288;
+	p->host_nperio_tx_fifo_size = 128;
+	p->host_perio_tx_fifo_size = 96;
+	p->max_transfer_size = 65535;
+	p->max_packet_count = 511;
+	p->ahbcfg = GAHBCFG_HBSTLEN_INCR16 <<
+		GAHBCFG_HBSTLEN_SHIFT;
 }
 
-/**
- * dwc2_set_param_u32() - Set a u32 parameter
- *
- * See dwc2_set_param().
- */
-static void dwc2_set_param_u32(struct dwc2_hsotg *hsotg, u32 *param,
-			       bool lookup, char *property, u16 legacy,
-			       u16 def, u16 min, u16 max)
+static void dwc2_set_amlogic_params(struct dwc2_hsotg *hsotg)
 {
-	dwc2_set_param(hsotg, param, lookup, property,
-		       legacy, def, min, max, 4);
+	struct dwc2_core_params *p = &hsotg->params;
+
+	p->otg_cap = DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE;
+	p->speed = DWC2_SPEED_PARAM_HIGH;
+	p->host_rx_fifo_size = 512;
+	p->host_nperio_tx_fifo_size = 500;
+	p->host_perio_tx_fifo_size = 500;
+	p->host_channels = 16;
+	p->phy_type = DWC2_PHY_TYPE_PARAM_UTMI;
+	p->ahbcfg = GAHBCFG_HBSTLEN_INCR8 <<
+		GAHBCFG_HBSTLEN_SHIFT;
+	p->uframe_sched = false;
 }
 
-/**
- * dwc2_set_param_bool() - Set a bool parameter
- *
- * See dwc2_set_param().
- *
- * Note: there is no 'legacy' argument here because there is no legacy
- * source of bool params.
- */
-static void dwc2_set_param_bool(struct dwc2_hsotg *hsotg, bool *param,
-				bool lookup, char *property,
-				bool def, bool min, bool max)
+static void dwc2_set_amcc_params(struct dwc2_hsotg *hsotg)
 {
-	dwc2_set_param(hsotg, param, lookup, property,
-		       def, def, min, max, 0);
+	struct dwc2_core_params *p = &hsotg->params;
+
+	p->ahbcfg = GAHBCFG_HBSTLEN_INCR16 << GAHBCFG_HBSTLEN_SHIFT;
 }
 
-#define DWC2_OUT_OF_BOUNDS(a, b, c)	((a) < (b) || (a) > (c))
+const struct of_device_id dwc2_of_match_table[] = {
+	{ .compatible = "brcm,bcm2835-usb", .data = dwc2_set_bcm_params },
+	{ .compatible = "hisilicon,hi6220-usb", .data = dwc2_set_his_params  },
+	{ .compatible = "rockchip,rk3066-usb", .data = dwc2_set_rk_params },
+	{ .compatible = "lantiq,arx100-usb", .data = dwc2_set_ltq_params },
+	{ .compatible = "lantiq,xrx200-usb", .data = dwc2_set_ltq_params },
+	{ .compatible = "snps,dwc2" },
+	{ .compatible = "samsung,s3c6400-hsotg" },
+	{ .compatible = "amlogic,meson8b-usb",
+	  .data = dwc2_set_amlogic_params },
+	{ .compatible = "amlogic,meson-gxbb-usb",
+	  .data = dwc2_set_amlogic_params },
+	{ .compatible = "amcc,dwc-otg", .data = dwc2_set_amcc_params },
+	{},
+};
+MODULE_DEVICE_TABLE(of, dwc2_of_match_table);
 
-/* Parameter access functions */
-static void dwc2_set_param_otg_cap(struct dwc2_hsotg *hsotg, int val)
+static void dwc2_set_param_otg_cap(struct dwc2_hsotg *hsotg)
 {
-	int valid = 1;
+	u8 val;
 
-	switch (val) {
-	case DWC2_CAP_PARAM_HNP_SRP_CAPABLE:
-		if (hsotg->hw_params.op_mode != GHWCFG2_OP_MODE_HNP_SRP_CAPABLE)
-			valid = 0;
+	switch (hsotg->hw_params.op_mode) {
+	case GHWCFG2_OP_MODE_HNP_SRP_CAPABLE:
+		val = DWC2_CAP_PARAM_HNP_SRP_CAPABLE;
 		break;
-	case DWC2_CAP_PARAM_SRP_ONLY_CAPABLE:
-		switch (hsotg->hw_params.op_mode) {
-		case GHWCFG2_OP_MODE_HNP_SRP_CAPABLE:
-		case GHWCFG2_OP_MODE_SRP_ONLY_CAPABLE:
-		case GHWCFG2_OP_MODE_SRP_CAPABLE_DEVICE:
-		case GHWCFG2_OP_MODE_SRP_CAPABLE_HOST:
-			break;
-		default:
-			valid = 0;
-			break;
-		}
-		break;
-	case DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE:
-		/* always valid */
+	case GHWCFG2_OP_MODE_SRP_ONLY_CAPABLE:
+	case GHWCFG2_OP_MODE_SRP_CAPABLE_DEVICE:
+	case GHWCFG2_OP_MODE_SRP_CAPABLE_HOST:
+		val = DWC2_CAP_PARAM_SRP_ONLY_CAPABLE;
 		break;
 	default:
-		valid = 0;
+		val = DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE;
 		break;
 	}
 
-	if (!valid) {
-		if (val >= 0)
-			dev_err(hsotg->dev,
-				"%d invalid for otg_cap parameter. Check HW configuration.\n",
-				val);
-		switch (hsotg->hw_params.op_mode) {
-		case GHWCFG2_OP_MODE_HNP_SRP_CAPABLE:
-			val = DWC2_CAP_PARAM_HNP_SRP_CAPABLE;
-			break;
-		case GHWCFG2_OP_MODE_SRP_ONLY_CAPABLE:
-		case GHWCFG2_OP_MODE_SRP_CAPABLE_DEVICE:
-		case GHWCFG2_OP_MODE_SRP_CAPABLE_HOST:
-			val = DWC2_CAP_PARAM_SRP_ONLY_CAPABLE;
-			break;
-		default:
-			val = DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE;
-			break;
-		}
-		dev_dbg(hsotg->dev, "Setting otg_cap to %d\n", val);
-	}
-
 	hsotg->params.otg_cap = val;
 }
 
-static void dwc2_set_param_dma_desc_enable(struct dwc2_hsotg *hsotg, int val)
+static void dwc2_set_param_phy_type(struct dwc2_hsotg *hsotg)
 {
-	int valid = 1;
+	int val;
+	u32 hs_phy_type = hsotg->hw_params.hs_phy_type;
 
-	if (val > 0 && (hsotg->params.host_dma <= 0 ||
-			!hsotg->hw_params.dma_desc_enable))
-		valid = 0;
-	if (val < 0)
-		valid = 0;
-
-	if (!valid) {
-		if (val >= 0)
-			dev_err(hsotg->dev,
-				"%d invalid for dma_desc_enable parameter. Check HW configuration.\n",
-				val);
-		val = (hsotg->params.host_dma > 0 &&
-			hsotg->hw_params.dma_desc_enable);
-		dev_dbg(hsotg->dev, "Setting dma_desc_enable to %d\n", val);
+	val = DWC2_PHY_TYPE_PARAM_FS;
+	if (hs_phy_type != GHWCFG2_HS_PHY_TYPE_NOT_SUPPORTED) {
+		if (hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI ||
+		    hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI_ULPI)
+			val = DWC2_PHY_TYPE_PARAM_UTMI;
+		else
+			val = DWC2_PHY_TYPE_PARAM_ULPI;
 	}
 
-	hsotg->params.dma_desc_enable = val;
-}
-
-static void dwc2_set_param_dma_desc_fs_enable(struct dwc2_hsotg *hsotg, int val)
-{
-	int valid = 1;
-
-	if (val > 0 && (hsotg->params.host_dma <= 0 ||
-			!hsotg->hw_params.dma_desc_enable))
-		valid = 0;
-	if (val < 0)
-		valid = 0;
-
-	if (!valid) {
-		if (val >= 0)
-			dev_err(hsotg->dev,
-				"%d invalid for dma_desc_fs_enable parameter. Check HW configuration.\n",
-				val);
-		val = (hsotg->params.host_dma > 0 &&
-			hsotg->hw_params.dma_desc_enable);
-	}
+	if (dwc2_is_fs_iot(hsotg))
+		hsotg->params.phy_type = DWC2_PHY_TYPE_PARAM_FS;
 
-	hsotg->params.dma_desc_fs_enable = val;
-	dev_dbg(hsotg->dev, "Setting dma_desc_fs_enable to %d\n", val);
+	hsotg->params.phy_type = val;
 }
 
-static void
-dwc2_set_param_host_support_fs_ls_low_power(struct dwc2_hsotg *hsotg,
-					    int val)
+static void dwc2_set_param_speed(struct dwc2_hsotg *hsotg)
 {
-	if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
-		if (val >= 0) {
-			dev_err(hsotg->dev,
-				"Wrong value for host_support_fs_low_power\n");
-			dev_err(hsotg->dev,
-				"host_support_fs_low_power must be 0 or 1\n");
-		}
-		val = 0;
-		dev_dbg(hsotg->dev,
-			"Setting host_support_fs_low_power to %d\n", val);
-	}
+	int val;
 
-	hsotg->params.host_support_fs_ls_low_power = val;
-}
-
-static void dwc2_set_param_enable_dynamic_fifo(struct dwc2_hsotg *hsotg,
-					       int val)
-{
-	int valid = 1;
+	val = hsotg->params.phy_type == DWC2_PHY_TYPE_PARAM_FS ?
+		DWC2_SPEED_PARAM_FULL : DWC2_SPEED_PARAM_HIGH;
 
-	if (val > 0 && !hsotg->hw_params.enable_dynamic_fifo)
-		valid = 0;
-	if (val < 0)
-		valid = 0;
+	if (dwc2_is_fs_iot(hsotg))
+		val = DWC2_SPEED_PARAM_FULL;
 
-	if (!valid) {
-		if (val >= 0)
-			dev_err(hsotg->dev,
-				"%d invalid for enable_dynamic_fifo parameter. Check HW configuration.\n",
-				val);
-		val = hsotg->hw_params.enable_dynamic_fifo;
-		dev_dbg(hsotg->dev, "Setting enable_dynamic_fifo to %d\n", val);
-	}
+	if (dwc2_is_hs_iot(hsotg))
+		val = DWC2_SPEED_PARAM_HIGH;
 
-	hsotg->params.enable_dynamic_fifo = val;
+	hsotg->params.speed = val;
 }
 
-static void dwc2_set_param_host_rx_fifo_size(struct dwc2_hsotg *hsotg, int val)
+static void dwc2_set_param_phy_utmi_width(struct dwc2_hsotg *hsotg)
 {
-	int valid = 1;
+	int val;
 
-	if (val < 16 || val > hsotg->hw_params.rx_fifo_size)
-		valid = 0;
-
-	if (!valid) {
-		if (val >= 0)
-			dev_err(hsotg->dev,
-				"%d invalid for host_rx_fifo_size. Check HW configuration.\n",
-				val);
-		val = hsotg->hw_params.rx_fifo_size;
-		dev_dbg(hsotg->dev, "Setting host_rx_fifo_size to %d\n", val);
-	}
+	val = (hsotg->hw_params.utmi_phy_data_width ==
+	       GHWCFG4_UTMI_PHY_DATA_WIDTH_8) ? 8 : 16;
 
-	hsotg->params.host_rx_fifo_size = val;
+	hsotg->params.phy_utmi_width = val;
 }
 
-static void dwc2_set_param_host_nperio_tx_fifo_size(struct dwc2_hsotg *hsotg,
-						    int val)
+static void dwc2_set_param_tx_fifo_sizes(struct dwc2_hsotg *hsotg)
 {
-	int valid = 1;
-
-	if (val < 16 || val > hsotg->hw_params.host_nperio_tx_fifo_size)
-		valid = 0;
+	struct dwc2_core_params *p = &hsotg->params;
+	int depth_average;
+	int fifo_count;
+	int i;
 
-	if (!valid) {
-		if (val >= 0)
-			dev_err(hsotg->dev,
-				"%d invalid for host_nperio_tx_fifo_size. Check HW configuration.\n",
-				val);
-		val = hsotg->hw_params.host_nperio_tx_fifo_size;
-		dev_dbg(hsotg->dev, "Setting host_nperio_tx_fifo_size to %d\n",
-			val);
-	}
+	fifo_count = dwc2_hsotg_tx_fifo_count(hsotg);
 
-	hsotg->params.host_nperio_tx_fifo_size = val;
+	memset(p->g_tx_fifo_size, 0, sizeof(p->g_tx_fifo_size));
+	depth_average = dwc2_hsotg_tx_fifo_average_depth(hsotg);
+	for (i = 1; i <= fifo_count; i++)
+		p->g_tx_fifo_size[i] = depth_average;
 }
 
-static void dwc2_set_param_host_perio_tx_fifo_size(struct dwc2_hsotg *hsotg,
-						   int val)
+/**
+ * dwc2_set_default_params() - Set all core parameters to their
+ * auto-detected default values.
+ */
+static void dwc2_set_default_params(struct dwc2_hsotg *hsotg)
 {
-	int valid = 1;
+	struct dwc2_hw_params *hw = &hsotg->hw_params;
+	struct dwc2_core_params *p = &hsotg->params;
+	bool dma_capable = !(hw->arch == GHWCFG2_SLAVE_ONLY_ARCH);
 
-	if (val < 16 || val > hsotg->hw_params.host_perio_tx_fifo_size)
-		valid = 0;
+	dwc2_set_param_otg_cap(hsotg);
+	dwc2_set_param_phy_type(hsotg);
+	dwc2_set_param_speed(hsotg);
+	dwc2_set_param_phy_utmi_width(hsotg);
+	p->phy_ulpi_ddr = false;
+	p->phy_ulpi_ext_vbus = false;
+
+	p->enable_dynamic_fifo = hw->enable_dynamic_fifo;
+	p->en_multiple_tx_fifo = hw->en_multiple_tx_fifo;
+	p->i2c_enable = hw->i2c_enable;
+	p->ulpi_fs_ls = false;
+	p->ts_dline = false;
+	p->reload_ctl = (hw->snpsid >= DWC2_CORE_REV_2_92a);
+	p->uframe_sched = true;
+	p->external_id_pin_ctl = false;
+	p->hibernation = false;
+	p->max_packet_count = hw->max_packet_count;
+	p->max_transfer_size = hw->max_transfer_size;
+	p->ahbcfg = GAHBCFG_HBSTLEN_INCR4 << GAHBCFG_HBSTLEN_SHIFT;
 
-	if (!valid) {
-		if (val >= 0)
-			dev_err(hsotg->dev,
-				"%d invalid for host_perio_tx_fifo_size. Check HW configuration.\n",
-				val);
-		val = hsotg->hw_params.host_perio_tx_fifo_size;
-		dev_dbg(hsotg->dev, "Setting host_perio_tx_fifo_size to %d\n",
-			val);
+	if ((hsotg->dr_mode == USB_DR_MODE_HOST) ||
+	    (hsotg->dr_mode == USB_DR_MODE_OTG)) {
+		p->host_dma = dma_capable;
+		p->dma_desc_enable = false;
+		p->dma_desc_fs_enable = false;
+		p->host_support_fs_ls_low_power = false;
+		p->host_ls_low_power_phy_clk = false;
+		p->host_channels = hw->host_channels;
+		p->host_rx_fifo_size = hw->rx_fifo_size;
+		p->host_nperio_tx_fifo_size = hw->host_nperio_tx_fifo_size;
+		p->host_perio_tx_fifo_size = hw->host_perio_tx_fifo_size;
 	}
 
-	hsotg->params.host_perio_tx_fifo_size = val;
-}
-
-static void dwc2_set_param_max_transfer_size(struct dwc2_hsotg *hsotg, int val)
-{
-	int valid = 1;
-
-	if (val < 2047 || val > hsotg->hw_params.max_transfer_size)
-		valid = 0;
+	if ((hsotg->dr_mode == USB_DR_MODE_PERIPHERAL) ||
+	    (hsotg->dr_mode == USB_DR_MODE_OTG)) {
+		p->g_dma = dma_capable;
+		p->g_dma_desc = hw->dma_desc_enable;
 
-	if (!valid) {
-		if (val >= 0)
-			dev_err(hsotg->dev,
-				"%d invalid for max_transfer_size. Check HW configuration.\n",
-				val);
-		val = hsotg->hw_params.max_transfer_size;
-		dev_dbg(hsotg->dev, "Setting max_transfer_size to %d\n", val);
+		/*
+		 * The values for g_rx_fifo_size (2048) and
+		 * g_np_tx_fifo_size (1024) come from the legacy s3c
+		 * gadget driver. These defaults have been hard-coded
+		 * for some time so many platforms depend on these
+		 * values. Leave them as defaults for now and only
+		 * auto-detect if the hardware does not support the
+		 * default.
+		 */
+		p->g_rx_fifo_size = 2048;
+		p->g_np_tx_fifo_size = 1024;
+		dwc2_set_param_tx_fifo_sizes(hsotg);
 	}
-
-	hsotg->params.max_transfer_size = val;
 }
 
-static void dwc2_set_param_max_packet_count(struct dwc2_hsotg *hsotg, int val)
+/**
+ * dwc2_get_device_properties() - Read in device properties.
+ *
+ * Read in the device properties and adjust core parameters if needed.
+ */
+static void dwc2_get_device_properties(struct dwc2_hsotg *hsotg)
 {
-	int valid = 1;
-
-	if (val < 15 || val > hsotg->hw_params.max_packet_count)
-		valid = 0;
+	struct dwc2_core_params *p = &hsotg->params;
+	int num;
 
-	if (!valid) {
-		if (val >= 0)
-			dev_err(hsotg->dev,
-				"%d invalid for max_packet_count. Check HW configuration.\n",
-				val);
-		val = hsotg->hw_params.max_packet_count;
-		dev_dbg(hsotg->dev, "Setting max_packet_count to %d\n", val);
+	if ((hsotg->dr_mode == USB_DR_MODE_PERIPHERAL) ||
+	    (hsotg->dr_mode == USB_DR_MODE_OTG)) {
+		device_property_read_u32(hsotg->dev, "g-rx-fifo-size",
+					 &p->g_rx_fifo_size);
+
+		device_property_read_u32(hsotg->dev, "g-np-tx-fifo-size",
+					 &p->g_np_tx_fifo_size);
+
+		num = device_property_read_u32_array(hsotg->dev,
+						     "g-tx-fifo-size",
+						     NULL, 0);
+
+		if (num > 0) {
+			num = min(num, 15);
+			memset(p->g_tx_fifo_size, 0,
+			       sizeof(p->g_tx_fifo_size));
+			device_property_read_u32_array(hsotg->dev,
+						       "g-tx-fifo-size",
+						       &p->g_tx_fifo_size[1],
+						       num);
+		}
 	}
-
-	hsotg->params.max_packet_count = val;
 }
 
-static void dwc2_set_param_host_channels(struct dwc2_hsotg *hsotg, int val)
+static void dwc2_check_param_otg_cap(struct dwc2_hsotg *hsotg)
 {
 	int valid = 1;
 
-	if (val < 1 || val > hsotg->hw_params.host_channels)
+	switch (hsotg->params.otg_cap) {
+	case DWC2_CAP_PARAM_HNP_SRP_CAPABLE:
+		if (hsotg->hw_params.op_mode != GHWCFG2_OP_MODE_HNP_SRP_CAPABLE)
+			valid = 0;
+		break;
+	case DWC2_CAP_PARAM_SRP_ONLY_CAPABLE:
+		switch (hsotg->hw_params.op_mode) {
+		case GHWCFG2_OP_MODE_HNP_SRP_CAPABLE:
+		case GHWCFG2_OP_MODE_SRP_ONLY_CAPABLE:
+		case GHWCFG2_OP_MODE_SRP_CAPABLE_DEVICE:
+		case GHWCFG2_OP_MODE_SRP_CAPABLE_HOST:
+			break;
+		default:
+			valid = 0;
+			break;
+		}
+		break;
+	case DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE:
+		/* always valid */
+		break;
+	default:
 		valid = 0;
-
-	if (!valid) {
-		if (val >= 0)
-			dev_err(hsotg->dev,
-				"%d invalid for host_channels. Check HW configuration.\n",
-				val);
-		val = hsotg->hw_params.host_channels;
-		dev_dbg(hsotg->dev, "Setting host_channels to %d\n", val);
+		break;
 	}
 
-	hsotg->params.host_channels = val;
+	if (!valid)
+		dwc2_set_param_otg_cap(hsotg);
 }
 
-static void dwc2_set_param_phy_type(struct dwc2_hsotg *hsotg, int val)
+static void dwc2_check_param_phy_type(struct dwc2_hsotg *hsotg)
 {
 	int valid = 0;
-	u32 hs_phy_type, fs_phy_type;
-
-	if (DWC2_OUT_OF_BOUNDS(val, DWC2_PHY_TYPE_PARAM_FS,
-			       DWC2_PHY_TYPE_PARAM_ULPI)) {
-		if (val >= 0) {
-			dev_err(hsotg->dev, "Wrong value for phy_type\n");
-			dev_err(hsotg->dev, "phy_type must be 0, 1 or 2\n");
-		}
-
-		valid = 0;
-	}
+	u32 hs_phy_type;
+	u32 fs_phy_type;
 
 	hs_phy_type = hsotg->hw_params.hs_phy_type;
 	fs_phy_type = hsotg->hw_params.fs_phy_type;
-	if (val == DWC2_PHY_TYPE_PARAM_UTMI &&
-	    (hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI ||
-	     hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI_ULPI))
-		valid = 1;
-	else if (val == DWC2_PHY_TYPE_PARAM_ULPI &&
-		 (hs_phy_type == GHWCFG2_HS_PHY_TYPE_ULPI ||
-		  hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI_ULPI))
-		valid = 1;
-	else if (val == DWC2_PHY_TYPE_PARAM_FS &&
-		 fs_phy_type == GHWCFG2_FS_PHY_TYPE_DEDICATED)
-		valid = 1;
-
-	if (!valid) {
-		if (val >= 0)
-			dev_err(hsotg->dev,
-				"%d invalid for phy_type. Check HW configuration.\n",
-				val);
-		val = DWC2_PHY_TYPE_PARAM_FS;
-		if (hs_phy_type != GHWCFG2_HS_PHY_TYPE_NOT_SUPPORTED) {
-			if (hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI ||
-			    hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI_ULPI)
-				val = DWC2_PHY_TYPE_PARAM_UTMI;
-			else
-				val = DWC2_PHY_TYPE_PARAM_ULPI;
-		}
-		dev_dbg(hsotg->dev, "Setting phy_type to %d\n", val);
-	}
-
-	hsotg->params.phy_type = val;
-}
-
-static int dwc2_get_param_phy_type(struct dwc2_hsotg *hsotg)
-{
-	return hsotg->params.phy_type;
-}
-
-static void dwc2_set_param_speed(struct dwc2_hsotg *hsotg, int val)
-{
-	int valid = 1;
-
-	if (DWC2_OUT_OF_BOUNDS(val, 0, 2)) {
-		if (val >= 0) {
-			dev_err(hsotg->dev, "Wrong value for speed parameter\n");
-			dev_err(hsotg->dev, "max_speed parameter must be 0, 1, or 2\n");
-		}
-		valid = 0;
-	}
-
-	if (dwc2_is_hs_iot(hsotg) &&
-	    val == DWC2_SPEED_PARAM_LOW)
-		valid = 0;
-
-	if (val == DWC2_SPEED_PARAM_HIGH &&
-	    dwc2_get_param_phy_type(hsotg) == DWC2_PHY_TYPE_PARAM_FS)
-		valid = 0;
 
-	if (!valid) {
-		if (val >= 0)
-			dev_err(hsotg->dev,
-				"%d invalid for speed parameter. Check HW configuration.\n",
-				val);
-		val = dwc2_get_param_phy_type(hsotg) == DWC2_PHY_TYPE_PARAM_FS ?
-				DWC2_SPEED_PARAM_FULL : DWC2_SPEED_PARAM_HIGH;
-		dev_dbg(hsotg->dev, "Setting speed to %d\n", val);
+	switch (hsotg->params.phy_type) {
+	case DWC2_PHY_TYPE_PARAM_FS:
+		if (fs_phy_type == GHWCFG2_FS_PHY_TYPE_DEDICATED)
+			valid = 1;
+		break;
+	case DWC2_PHY_TYPE_PARAM_UTMI:
+		if ((hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI) ||
+		    (hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI_ULPI))
+			valid = 1;
+		break;
+	case DWC2_PHY_TYPE_PARAM_ULPI:
+		if ((hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI) ||
+		    (hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI_ULPI))
+			valid = 1;
+		break;
+	default:
+		break;
 	}
 
-	hsotg->params.speed = val;
+	if (!valid)
+		dwc2_set_param_phy_type(hsotg);
 }
 
-static void dwc2_set_param_host_ls_low_power_phy_clk(struct dwc2_hsotg *hsotg,
-						     int val)
+static void dwc2_check_param_speed(struct dwc2_hsotg *hsotg)
 {
 	int valid = 1;
+	int phy_type = hsotg->params.phy_type;
+	int speed = hsotg->params.speed;
 
-	if (DWC2_OUT_OF_BOUNDS(val, DWC2_HOST_LS_LOW_POWER_PHY_CLK_PARAM_48MHZ,
-			       DWC2_HOST_LS_LOW_POWER_PHY_CLK_PARAM_6MHZ)) {
-		if (val >= 0) {
-			dev_err(hsotg->dev,
-				"Wrong value for host_ls_low_power_phy_clk parameter\n");
-			dev_err(hsotg->dev,
-				"host_ls_low_power_phy_clk must be 0 or 1\n");
-		}
-		valid = 0;
-	}
-
-	if (val == DWC2_HOST_LS_LOW_POWER_PHY_CLK_PARAM_48MHZ &&
-	    dwc2_get_param_phy_type(hsotg) == DWC2_PHY_TYPE_PARAM_FS)
+	switch (speed) {
+	case DWC2_SPEED_PARAM_HIGH:
+		if ((hsotg->params.speed == DWC2_SPEED_PARAM_HIGH) &&
+		    (phy_type == DWC2_PHY_TYPE_PARAM_FS))
+			valid = 0;
+		break;
+	case DWC2_SPEED_PARAM_FULL:
+	case DWC2_SPEED_PARAM_LOW:
+		break;
+	default:
 		valid = 0;
-
-	if (!valid) {
-		if (val >= 0)
-			dev_err(hsotg->dev,
-				"%d invalid for host_ls_low_power_phy_clk. Check HW configuration.\n",
-				val);
-		val = dwc2_get_param_phy_type(hsotg) == DWC2_PHY_TYPE_PARAM_FS
-			? DWC2_HOST_LS_LOW_POWER_PHY_CLK_PARAM_6MHZ
-			: DWC2_HOST_LS_LOW_POWER_PHY_CLK_PARAM_48MHZ;
-		dev_dbg(hsotg->dev, "Setting host_ls_low_power_phy_clk to %d\n",
-			val);
-	}
-
-	hsotg->params.host_ls_low_power_phy_clk = val;
-}
-
-static void dwc2_set_param_phy_ulpi_ddr(struct dwc2_hsotg *hsotg, int val)
-{
-	if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
-		if (val >= 0) {
-			dev_err(hsotg->dev, "Wrong value for phy_ulpi_ddr\n");
-			dev_err(hsotg->dev, "phy_upli_ddr must be 0 or 1\n");
-		}
-		val = 0;
-		dev_dbg(hsotg->dev, "Setting phy_upli_ddr to %d\n", val);
-	}
-
-	hsotg->params.phy_ulpi_ddr = val;
-}
-
-static void dwc2_set_param_phy_ulpi_ext_vbus(struct dwc2_hsotg *hsotg, int val)
-{
-	if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
-		if (val >= 0) {
-			dev_err(hsotg->dev,
-				"Wrong value for phy_ulpi_ext_vbus\n");
-			dev_err(hsotg->dev,
-				"phy_ulpi_ext_vbus must be 0 or 1\n");
-		}
-		val = 0;
-		dev_dbg(hsotg->dev, "Setting phy_ulpi_ext_vbus to %d\n", val);
+		break;
 	}
 
-	hsotg->params.phy_ulpi_ext_vbus = val;
+	if (!valid)
+		dwc2_set_param_speed(hsotg);
 }
 
-static void dwc2_set_param_phy_utmi_width(struct dwc2_hsotg *hsotg, int val)
+static void dwc2_check_param_phy_utmi_width(struct dwc2_hsotg *hsotg)
 {
 	int valid = 0;
+	int param = hsotg->params.phy_utmi_width;
+	int width = hsotg->hw_params.utmi_phy_data_width;
 
-	switch (hsotg->hw_params.utmi_phy_data_width) {
+	switch (width) {
 	case GHWCFG4_UTMI_PHY_DATA_WIDTH_8:
-		valid = (val == 8);
+		valid = (param == 8);
 		break;
 	case GHWCFG4_UTMI_PHY_DATA_WIDTH_16:
-		valid = (val == 16);
+		valid = (param == 16);
 		break;
 	case GHWCFG4_UTMI_PHY_DATA_WIDTH_8_OR_16:
-		valid = (val == 8 || val == 16);
+		valid = (param == 8 || param == 16);
 		break;
 	}
 
-	if (!valid) {
-		if (val >= 0) {
-			dev_err(hsotg->dev,
-				"%d invalid for phy_utmi_width. Check HW configuration.\n",
-				val);
-		}
-		val = (hsotg->hw_params.utmi_phy_data_width ==
-		       GHWCFG4_UTMI_PHY_DATA_WIDTH_8) ? 8 : 16;
-		dev_dbg(hsotg->dev, "Setting phy_utmi_width to %d\n", val);
-	}
-
-	hsotg->params.phy_utmi_width = val;
-}
-
-static void dwc2_set_param_ulpi_fs_ls(struct dwc2_hsotg *hsotg, int val)
-{
-	if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
-		if (val >= 0) {
-			dev_err(hsotg->dev, "Wrong value for ulpi_fs_ls\n");
-			dev_err(hsotg->dev, "ulpi_fs_ls must be 0 or 1\n");
-		}
-		val = 0;
-		dev_dbg(hsotg->dev, "Setting ulpi_fs_ls to %d\n", val);
-	}
-
-	hsotg->params.ulpi_fs_ls = val;
-}
-
-static void dwc2_set_param_ts_dline(struct dwc2_hsotg *hsotg, int val)
-{
-	if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
-		if (val >= 0) {
-			dev_err(hsotg->dev, "Wrong value for ts_dline\n");
-			dev_err(hsotg->dev, "ts_dline must be 0 or 1\n");
-		}
-		val = 0;
-		dev_dbg(hsotg->dev, "Setting ts_dline to %d\n", val);
-	}
-
-	hsotg->params.ts_dline = val;
-}
-
-static void dwc2_set_param_i2c_enable(struct dwc2_hsotg *hsotg, int val)
-{
-	int valid = 1;
-
-	if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
-		if (val >= 0) {
-			dev_err(hsotg->dev, "Wrong value for i2c_enable\n");
-			dev_err(hsotg->dev, "i2c_enable must be 0 or 1\n");
-		}
-
-		valid = 0;
-	}
-
-	if (val == 1 && !(hsotg->hw_params.i2c_enable))
-		valid = 0;
-
-	if (!valid) {
-		if (val >= 0)
-			dev_err(hsotg->dev,
-				"%d invalid for i2c_enable. Check HW configuration.\n",
-				val);
-		val = hsotg->hw_params.i2c_enable;
-		dev_dbg(hsotg->dev, "Setting i2c_enable to %d\n", val);
-	}
-
-	hsotg->params.i2c_enable = val;
-}
-
-static void dwc2_set_param_en_multiple_tx_fifo(struct dwc2_hsotg *hsotg,
-					       int val)
-{
-	int valid = 1;
-
-	if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
-		if (val >= 0) {
-			dev_err(hsotg->dev,
-				"Wrong value for en_multiple_tx_fifo,\n");
-			dev_err(hsotg->dev,
-				"en_multiple_tx_fifo must be 0 or 1\n");
-		}
-		valid = 0;
-	}
-
-	if (val == 1 && !hsotg->hw_params.en_multiple_tx_fifo)
-		valid = 0;
-
-	if (!valid) {
-		if (val >= 0)
-			dev_err(hsotg->dev,
-				"%d invalid for parameter en_multiple_tx_fifo. Check HW configuration.\n",
-				val);
-		val = hsotg->hw_params.en_multiple_tx_fifo;
-		dev_dbg(hsotg->dev, "Setting en_multiple_tx_fifo to %d\n", val);
-	}
-
-	hsotg->params.en_multiple_tx_fifo = val;
+	if (!valid)
+		dwc2_set_param_phy_utmi_width(hsotg);
 }
 
-static void dwc2_set_param_reload_ctl(struct dwc2_hsotg *hsotg, int val)
+static void dwc2_check_param_tx_fifo_sizes(struct dwc2_hsotg *hsotg)
 {
-	int valid = 1;
-
-	if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
-		if (val >= 0) {
-			dev_err(hsotg->dev,
-				"'%d' invalid for parameter reload_ctl\n", val);
-			dev_err(hsotg->dev, "reload_ctl must be 0 or 1\n");
-		}
-		valid = 0;
-	}
-
-	if (val == 1 && hsotg->hw_params.snpsid < DWC2_CORE_REV_2_92a)
-		valid = 0;
-
-	if (!valid) {
-		if (val >= 0)
-			dev_err(hsotg->dev,
-				"%d invalid for parameter reload_ctl. Check HW configuration.\n",
-				val);
-		val = hsotg->hw_params.snpsid >= DWC2_CORE_REV_2_92a;
-		dev_dbg(hsotg->dev, "Setting reload_ctl to %d\n", val);
-	}
+	int fifo_count;
+	int fifo;
+	int min;
+	u32 total = 0;
+	u32 dptxfszn;
 
-	hsotg->params.reload_ctl = val;
-}
+	fifo_count = dwc2_hsotg_tx_fifo_count(hsotg);
+	min = hsotg->hw_params.en_multiple_tx_fifo ? 16 : 4;
 
-static void dwc2_set_param_ahbcfg(struct dwc2_hsotg *hsotg, int val)
-{
-	if (val != -1)
-		hsotg->params.ahbcfg = val;
-	else
-		hsotg->params.ahbcfg = GAHBCFG_HBSTLEN_INCR4 <<
-						GAHBCFG_HBSTLEN_SHIFT;
-}
+	for (fifo = 1; fifo <= fifo_count; fifo++)
+		total += hsotg->params.g_tx_fifo_size[fifo];
 
-static void dwc2_set_param_otg_ver(struct dwc2_hsotg *hsotg, int val)
-{
-	if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
-		if (val >= 0) {
-			dev_err(hsotg->dev,
-				"'%d' invalid for parameter otg_ver\n", val);
-			dev_err(hsotg->dev,
-				"otg_ver must be 0 (for OTG 1.3 support) or 1 (for OTG 2.0 support)\n");
-		}
-		val = 0;
-		dev_dbg(hsotg->dev, "Setting otg_ver to %d\n", val);
+	if (total > dwc2_hsotg_tx_fifo_total_depth(hsotg) || !total) {
+		dev_warn(hsotg->dev, "%s: Invalid parameter g-tx-fifo-size, setting to default average\n",
+			 __func__);
+		dwc2_set_param_tx_fifo_sizes(hsotg);
 	}
 
-	hsotg->params.otg_ver = val;
-}
+	for (fifo = 1; fifo <= fifo_count; fifo++) {
+		dptxfszn = (dwc2_readl(hsotg->regs + DPTXFSIZN(fifo)) &
+			FIFOSIZE_DEPTH_MASK) >> FIFOSIZE_DEPTH_SHIFT;
 
-static void dwc2_set_param_uframe_sched(struct dwc2_hsotg *hsotg, int val)
-{
-	if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
-		if (val >= 0) {
-			dev_err(hsotg->dev,
-				"'%d' invalid for parameter uframe_sched\n",
-				val);
-			dev_err(hsotg->dev, "uframe_sched must be 0 or 1\n");
+		if (hsotg->params.g_tx_fifo_size[fifo] < min ||
+		    hsotg->params.g_tx_fifo_size[fifo] >  dptxfszn) {
+			dev_warn(hsotg->dev, "%s: Invalid parameter g_tx_fifo_size[%d]=%d\n",
+				 __func__, fifo,
+				 hsotg->params.g_tx_fifo_size[fifo]);
+			hsotg->params.g_tx_fifo_size[fifo] = dptxfszn;
 		}
-		val = 1;
-		dev_dbg(hsotg->dev, "Setting uframe_sched to %d\n", val);
 	}
-
-	hsotg->params.uframe_sched = val;
 }
 
-static void dwc2_set_param_external_id_pin_ctl(struct dwc2_hsotg *hsotg,
-					       int val)
-{
-	if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
-		if (val >= 0) {
-			dev_err(hsotg->dev,
-				"'%d' invalid for parameter external_id_pin_ctl\n",
-				val);
-			dev_err(hsotg->dev, "external_id_pin_ctl must be 0 or 1\n");
-		}
-		val = 0;
-		dev_dbg(hsotg->dev, "Setting external_id_pin_ctl to %d\n", val);
-	}
+#define CHECK_RANGE(_param, _min, _max, _def) do {			\
+		if ((hsotg->params._param) < (_min) ||			\
+		    (hsotg->params._param) > (_max)) {			\
+			dev_warn(hsotg->dev, "%s: Invalid parameter %s=%d\n", \
+				 __func__, #_param, hsotg->params._param); \
+			hsotg->params._param = (_def);			\
+		}							\
+	} while (0)
 
-	hsotg->params.external_id_pin_ctl = val;
-}
+#define CHECK_BOOL(_param, _check) do {					\
+		if (hsotg->params._param && !(_check)) {		\
+			dev_warn(hsotg->dev, "%s: Invalid parameter %s=%d\n", \
+				 __func__, #_param, hsotg->params._param); \
+			hsotg->params._param = false;			\
+		}							\
+	} while (0)
 
-static void dwc2_set_param_hibernation(struct dwc2_hsotg *hsotg,
-				       int val)
-{
-	if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
-		if (val >= 0) {
-			dev_err(hsotg->dev,
-				"'%d' invalid for parameter hibernation\n",
-				val);
-			dev_err(hsotg->dev, "hibernation must be 0 or 1\n");
-		}
-		val = 0;
-		dev_dbg(hsotg->dev, "Setting hibernation to %d\n", val);
-	}
-
-	hsotg->params.hibernation = val;
-}
-
-static void dwc2_set_param_tx_fifo_sizes(struct dwc2_hsotg *hsotg)
-{
-	int i;
-	int num;
-	char *property = "g-tx-fifo-size";
-	struct dwc2_core_params *p = &hsotg->params;
-
-	memset(p->g_tx_fifo_size, 0, sizeof(p->g_tx_fifo_size));
-
-	/* Read tx fifo sizes */
-	num = device_property_read_u32_array(hsotg->dev, property, NULL, 0);
-
-	if (num > 0) {
-		device_property_read_u32_array(hsotg->dev, property,
-					       &p->g_tx_fifo_size[1],
-					       num);
-	} else {
-		u32 p_tx_fifo[] = DWC2_G_P_LEGACY_TX_FIFO_SIZE;
-
-		memcpy(&p->g_tx_fifo_size[1],
-		       p_tx_fifo,
-		       sizeof(p_tx_fifo));
-
-		num = ARRAY_SIZE(p_tx_fifo);
-	}
-
-	for (i = 0; i < num; i++) {
-		if ((i + 1) >= ARRAY_SIZE(p->g_tx_fifo_size))
-			break;
-
-		dev_dbg(hsotg->dev, "Setting %s[%d] to %d\n",
-			property, i + 1, p->g_tx_fifo_size[i + 1]);
-	}
-}
-
-static void dwc2_set_gadget_dma(struct dwc2_hsotg *hsotg)
+static void dwc2_check_params(struct dwc2_hsotg *hsotg)
 {
 	struct dwc2_hw_params *hw = &hsotg->hw_params;
 	struct dwc2_core_params *p = &hsotg->params;
 	bool dma_capable = !(hw->arch == GHWCFG2_SLAVE_ONLY_ARCH);
 
-	/* Buffer DMA */
-	dwc2_set_param_bool(hsotg, &p->g_dma,
-			    false, "gadget-dma",
-			    dma_capable, false,
-			    dma_capable);
-
-	/* DMA Descriptor */
-	dwc2_set_param_bool(hsotg, &p->g_dma_desc, false,
-			    "gadget-dma-desc",
-			    !!hw->dma_desc_enable, false,
-			    !!hw->dma_desc_enable);
-}
+	dwc2_check_param_otg_cap(hsotg);
+	dwc2_check_param_phy_type(hsotg);
+	dwc2_check_param_speed(hsotg);
+	dwc2_check_param_phy_utmi_width(hsotg);
+	CHECK_BOOL(enable_dynamic_fifo, hw->enable_dynamic_fifo);
+	CHECK_BOOL(en_multiple_tx_fifo, hw->en_multiple_tx_fifo);
+	CHECK_BOOL(i2c_enable, hw->i2c_enable);
+	CHECK_BOOL(reload_ctl, (hsotg->hw_params.snpsid > DWC2_CORE_REV_2_92a));
+	CHECK_RANGE(max_packet_count,
+		    15, hw->max_packet_count,
+		    hw->max_packet_count);
+	CHECK_RANGE(max_transfer_size,
+		    2047, hw->max_transfer_size,
+		    hw->max_transfer_size);
 
-/**
- * dwc2_set_parameters() - Set all core parameters.
- *
- * @hsotg: Programming view of the DWC_otg controller
- * @params: The parameters to set
- */
-static void dwc2_set_parameters(struct dwc2_hsotg *hsotg,
-				const struct dwc2_core_params *params)
-{
-	struct dwc2_hw_params *hw = &hsotg->hw_params;
-	struct dwc2_core_params *p = &hsotg->params;
-	bool dma_capable = !(hw->arch == GHWCFG2_SLAVE_ONLY_ARCH);
-
-	dwc2_set_param_otg_cap(hsotg, params->otg_cap);
 	if ((hsotg->dr_mode == USB_DR_MODE_HOST) ||
 	    (hsotg->dr_mode == USB_DR_MODE_OTG)) {
-		dev_dbg(hsotg->dev, "Setting HOST parameters\n");
-
-		dwc2_set_param_bool(hsotg, &p->host_dma,
-				    false, "host-dma",
-				    dma_capable, false,
-				    dma_capable);
-		dwc2_set_param_host_rx_fifo_size(hsotg,
-				params->host_rx_fifo_size);
-		dwc2_set_param_host_nperio_tx_fifo_size(hsotg,
-				params->host_nperio_tx_fifo_size);
-		dwc2_set_param_host_perio_tx_fifo_size(hsotg,
-				params->host_perio_tx_fifo_size);
+		CHECK_BOOL(host_dma, dma_capable);
+		CHECK_BOOL(dma_desc_enable, p->host_dma);
+		CHECK_BOOL(dma_desc_fs_enable, p->dma_desc_enable);
+		CHECK_BOOL(host_ls_low_power_phy_clk,
+			   p->phy_type == DWC2_PHY_TYPE_PARAM_FS);
+		CHECK_RANGE(host_channels,
+			    1, hw->host_channels,
+			    hw->host_channels);
+		CHECK_RANGE(host_rx_fifo_size,
+			    16, hw->rx_fifo_size,
+			    hw->rx_fifo_size);
+		CHECK_RANGE(host_nperio_tx_fifo_size,
+			    16, hw->host_nperio_tx_fifo_size,
+			    hw->host_nperio_tx_fifo_size);
+		CHECK_RANGE(host_perio_tx_fifo_size,
+			    16, hw->host_perio_tx_fifo_size,
+			    hw->host_perio_tx_fifo_size);
 	}
-	dwc2_set_param_dma_desc_enable(hsotg, params->dma_desc_enable);
-	dwc2_set_param_dma_desc_fs_enable(hsotg, params->dma_desc_fs_enable);
-
-	dwc2_set_param_host_support_fs_ls_low_power(hsotg,
-			params->host_support_fs_ls_low_power);
-	dwc2_set_param_enable_dynamic_fifo(hsotg,
-			params->enable_dynamic_fifo);
-	dwc2_set_param_max_transfer_size(hsotg,
-			params->max_transfer_size);
-	dwc2_set_param_max_packet_count(hsotg,
-			params->max_packet_count);
-	dwc2_set_param_host_channels(hsotg, params->host_channels);
-	dwc2_set_param_phy_type(hsotg, params->phy_type);
-	dwc2_set_param_speed(hsotg, params->speed);
-	dwc2_set_param_host_ls_low_power_phy_clk(hsotg,
-			params->host_ls_low_power_phy_clk);
-	dwc2_set_param_phy_ulpi_ddr(hsotg, params->phy_ulpi_ddr);
-	dwc2_set_param_phy_ulpi_ext_vbus(hsotg,
-			params->phy_ulpi_ext_vbus);
-	dwc2_set_param_phy_utmi_width(hsotg, params->phy_utmi_width);
-	dwc2_set_param_ulpi_fs_ls(hsotg, params->ulpi_fs_ls);
-	dwc2_set_param_ts_dline(hsotg, params->ts_dline);
-	dwc2_set_param_i2c_enable(hsotg, params->i2c_enable);
-	dwc2_set_param_en_multiple_tx_fifo(hsotg,
-			params->en_multiple_tx_fifo);
-	dwc2_set_param_reload_ctl(hsotg, params->reload_ctl);
-	dwc2_set_param_ahbcfg(hsotg, params->ahbcfg);
-	dwc2_set_param_otg_ver(hsotg, params->otg_ver);
-	dwc2_set_param_uframe_sched(hsotg, params->uframe_sched);
-	dwc2_set_param_external_id_pin_ctl(hsotg, params->external_id_pin_ctl);
-	dwc2_set_param_hibernation(hsotg, params->hibernation);
 
-	/*
-	 * Set devicetree-only parameters. These parameters do not
-	 * take any values from @params.
-	 */
 	if ((hsotg->dr_mode == USB_DR_MODE_PERIPHERAL) ||
 	    (hsotg->dr_mode == USB_DR_MODE_OTG)) {
-		dev_dbg(hsotg->dev, "Setting peripheral device properties\n");
-
-		dwc2_set_gadget_dma(hsotg);
-
-		/*
-		 * The values for g_rx_fifo_size (2048) and
-		 * g_np_tx_fifo_size (1024) come from the legacy s3c
-		 * gadget driver. These defaults have been hard-coded
-		 * for some time so many platforms depend on these
-		 * values. Leave them as defaults for now and only
-		 * auto-detect if the hardware does not support the
-		 * default.
-		 */
-		dwc2_set_param_u32(hsotg, &p->g_rx_fifo_size,
-				   true, "g-rx-fifo-size", 2048,
-				   hw->rx_fifo_size,
-				   16, hw->rx_fifo_size);
-
-		dwc2_set_param_u32(hsotg, &p->g_np_tx_fifo_size,
-				   true, "g-np-tx-fifo-size", 1024,
-				   hw->dev_nperio_tx_fifo_size,
-				   16, hw->dev_nperio_tx_fifo_size);
-
-		dwc2_set_param_tx_fifo_sizes(hsotg);
+		CHECK_BOOL(g_dma, dma_capable);
+		CHECK_BOOL(g_dma_desc, (p->g_dma && hw->dma_desc_enable));
+		CHECK_RANGE(g_rx_fifo_size,
+			    16, hw->rx_fifo_size,
+			    hw->rx_fifo_size);
+		CHECK_RANGE(g_np_tx_fifo_size,
+			    16, hw->dev_nperio_tx_fifo_size,
+			    hw->dev_nperio_tx_fifo_size);
+		dwc2_check_param_tx_fifo_sizes(hsotg);
 	}
 }
 
@@ -1211,8 +553,6 @@ static void dwc2_get_host_hwparams(struct dwc2_hsotg *hsotg)
 
 	gnptxfsiz = dwc2_readl(hsotg->regs + GNPTXFSIZ);
 	hptxfsiz = dwc2_readl(hsotg->regs + HPTXFSIZ);
-	dev_dbg(hsotg->dev, "gnptxfsiz=%08x\n", gnptxfsiz);
-	dev_dbg(hsotg->dev, "hptxfsiz=%08x\n", hptxfsiz);
 
 	if (forced)
 		dwc2_clear_force_mode(hsotg);
@@ -1240,7 +580,6 @@ static void dwc2_get_dev_hwparams(struct dwc2_hsotg *hsotg)
 	forced = dwc2_force_mode_if_needed(hsotg, false);
 
 	gnptxfsiz = dwc2_readl(hsotg->regs + GNPTXFSIZ);
-	dev_dbg(hsotg->dev, "gnptxfsiz=%08x\n", gnptxfsiz);
 
 	if (forced)
 		dwc2_clear_force_mode(hsotg);
@@ -1286,12 +625,6 @@ int dwc2_get_hwparams(struct dwc2_hsotg *hsotg)
 	hwcfg4 = dwc2_readl(hsotg->regs + GHWCFG4);
 	grxfsiz = dwc2_readl(hsotg->regs + GRXFSIZ);
 
-	dev_dbg(hsotg->dev, "hwcfg1=%08x\n", hwcfg1);
-	dev_dbg(hsotg->dev, "hwcfg2=%08x\n", hwcfg2);
-	dev_dbg(hsotg->dev, "hwcfg3=%08x\n", hwcfg3);
-	dev_dbg(hsotg->dev, "hwcfg4=%08x\n", hwcfg4);
-	dev_dbg(hsotg->dev, "grxfsiz=%08x\n", grxfsiz);
-
 	/*
 	 * Host specific hardware parameters. Reading these parameters
 	 * requires the controller to be in host mode. The mode will
@@ -1351,73 +684,24 @@ int dwc2_get_hwparams(struct dwc2_hsotg *hsotg)
 	hw->rx_fifo_size = (grxfsiz & GRXFSIZ_DEPTH_MASK) >>
 				GRXFSIZ_DEPTH_SHIFT;
 
-	dev_dbg(hsotg->dev, "Detected values from hardware:\n");
-	dev_dbg(hsotg->dev, "  op_mode=%d\n",
-		hw->op_mode);
-	dev_dbg(hsotg->dev, "  arch=%d\n",
-		hw->arch);
-	dev_dbg(hsotg->dev, "  dma_desc_enable=%d\n",
-		hw->dma_desc_enable);
-	dev_dbg(hsotg->dev, "  power_optimized=%d\n",
-		hw->power_optimized);
-	dev_dbg(hsotg->dev, "  i2c_enable=%d\n",
-		hw->i2c_enable);
-	dev_dbg(hsotg->dev, "  hs_phy_type=%d\n",
-		hw->hs_phy_type);
-	dev_dbg(hsotg->dev, "  fs_phy_type=%d\n",
-		hw->fs_phy_type);
-	dev_dbg(hsotg->dev, "  utmi_phy_data_width=%d\n",
-		hw->utmi_phy_data_width);
-	dev_dbg(hsotg->dev, "  num_dev_ep=%d\n",
-		hw->num_dev_ep);
-	dev_dbg(hsotg->dev, "  num_dev_perio_in_ep=%d\n",
-		hw->num_dev_perio_in_ep);
-	dev_dbg(hsotg->dev, "  host_channels=%d\n",
-		hw->host_channels);
-	dev_dbg(hsotg->dev, "  max_transfer_size=%d\n",
-		hw->max_transfer_size);
-	dev_dbg(hsotg->dev, "  max_packet_count=%d\n",
-		hw->max_packet_count);
-	dev_dbg(hsotg->dev, "  nperio_tx_q_depth=0x%0x\n",
-		hw->nperio_tx_q_depth);
-	dev_dbg(hsotg->dev, "  host_perio_tx_q_depth=0x%0x\n",
-		hw->host_perio_tx_q_depth);
-	dev_dbg(hsotg->dev, "  dev_token_q_depth=0x%0x\n",
-		hw->dev_token_q_depth);
-	dev_dbg(hsotg->dev, "  enable_dynamic_fifo=%d\n",
-		hw->enable_dynamic_fifo);
-	dev_dbg(hsotg->dev, "  en_multiple_tx_fifo=%d\n",
-		hw->en_multiple_tx_fifo);
-	dev_dbg(hsotg->dev, "  total_fifo_size=%d\n",
-		hw->total_fifo_size);
-	dev_dbg(hsotg->dev, "  rx_fifo_size=%d\n",
-		hw->rx_fifo_size);
-	dev_dbg(hsotg->dev, "  host_nperio_tx_fifo_size=%d\n",
-		hw->host_nperio_tx_fifo_size);
-	dev_dbg(hsotg->dev, "  host_perio_tx_fifo_size=%d\n",
-		hw->host_perio_tx_fifo_size);
-	dev_dbg(hsotg->dev, "\n");
-
 	return 0;
 }
 
 int dwc2_init_params(struct dwc2_hsotg *hsotg)
 {
 	const struct of_device_id *match;
-	struct dwc2_core_params params;
+	void (*set_params)(void *data);
+
+	dwc2_set_default_params(hsotg);
+	dwc2_get_device_properties(hsotg);
 
 	match = of_match_device(dwc2_of_match_table, hsotg->dev);
-	if (match && match->data)
-		params = *((struct dwc2_core_params *)match->data);
-	else
-		params = params_default;
-
-	if (dwc2_is_fs_iot(hsotg)) {
-		params.speed = DWC2_SPEED_PARAM_FULL;
-		params.phy_type = DWC2_PHY_TYPE_PARAM_FS;
+	if (match && match->data) {
+		set_params = match->data;
+		set_params(hsotg);
 	}
 
-	dwc2_set_parameters(hsotg, &params);
+	dwc2_check_params(hsotg);
 
 	return 0;
 }
diff --git a/drivers/usb/dwc2/pci.c b/drivers/usb/dwc2/pci.c
index a23329e3d7cd..fdeb8c7bf30a 100644
--- a/drivers/usb/dwc2/pci.c
+++ b/drivers/usb/dwc2/pci.c
@@ -87,7 +87,7 @@ static void dwc2_pci_remove(struct pci_dev *pci)
 }
 
 static int dwc2_pci_probe(struct pci_dev *pci,
-		const struct pci_device_id *id)
+			  const struct pci_device_id *id)
 {
 	struct resource		res[2];
 	struct platform_device	*dwc2;
diff --git a/drivers/usb/dwc2/platform.c b/drivers/usb/dwc2/platform.c
index 4fc8c603afb8..9564bc76c56f 100644
--- a/drivers/usb/dwc2/platform.c
+++ b/drivers/usb/dwc2/platform.c
@@ -111,7 +111,7 @@ static int dwc2_get_dr_mode(struct dwc2_hsotg *hsotg)
 
 	if (mode != hsotg->dr_mode) {
 		dev_warn(hsotg->dev,
-			"Configuration mismatch. dr_mode forced to %s\n",
+			 "Configuration mismatch. dr_mode forced to %s\n",
 			mode == USB_DR_MODE_HOST ? "host" : "device");
 
 		hsotg->dr_mode = mode;
@@ -136,11 +136,11 @@ static int __dwc2_lowlevel_hw_enable(struct dwc2_hsotg *hsotg)
 			return ret;
 	}
 
-	if (hsotg->uphy)
+	if (hsotg->uphy) {
 		ret = usb_phy_init(hsotg->uphy);
-	else if (hsotg->plat && hsotg->plat->phy_init)
+	} else if (hsotg->plat && hsotg->plat->phy_init) {
 		ret = hsotg->plat->phy_init(pdev, hsotg->plat->phy_type);
-	else {
+	} else {
 		ret = phy_power_on(hsotg->phy);
 		if (ret == 0)
 			ret = phy_init(hsotg->phy);
@@ -170,11 +170,11 @@ static int __dwc2_lowlevel_hw_disable(struct dwc2_hsotg *hsotg)
 	struct platform_device *pdev = to_platform_device(hsotg->dev);
 	int ret = 0;
 
-	if (hsotg->uphy)
+	if (hsotg->uphy) {
 		usb_phy_shutdown(hsotg->uphy);
-	else if (hsotg->plat && hsotg->plat->phy_exit)
+	} else if (hsotg->plat && hsotg->plat->phy_exit) {
 		ret = hsotg->plat->phy_exit(pdev, hsotg->plat->phy_type);
-	else {
+	} else {
 		ret = phy_exit(hsotg->phy);
 		if (ret == 0)
 			ret = phy_power_off(hsotg->phy);
@@ -445,7 +445,7 @@ static int dwc2_driver_probe(struct platform_device *dev)
 	}
 
 	if (hsotg->dr_mode != USB_DR_MODE_PERIPHERAL) {
-		retval = dwc2_hcd_init(hsotg, hsotg->irq);
+		retval = dwc2_hcd_init(hsotg);
 		if (retval) {
 			if (hsotg->gadget_enabled)
 				dwc2_hsotg_remove(hsotg);
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index 14b760209680..2b9e4ca3c932 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -40,6 +40,7 @@
 /* Global constants */
 #define DWC3_PULL_UP_TIMEOUT	500	/* ms */
 #define DWC3_ZLP_BUF_SIZE	1024	/* size of a superspeed bulk */
+#define DWC3_BOUNCE_SIZE	1024	/* size of a superspeed bulk */
 #define DWC3_EP0_BOUNCE_SIZE	512
 #define DWC3_ENDPOINTS_NUM	32
 #define DWC3_XHCI_RESOURCES_NUM	2
@@ -724,6 +725,7 @@ struct dwc3_hwparams {
  * @epnum: endpoint number to which this request refers
  * @trb: pointer to struct dwc3_trb
  * @trb_dma: DMA address of @trb
+ * @unaligned: true for OUT endpoints with length not divisible by maxp
  * @direction: IN or OUT direction flag
  * @mapped: true when request has been dma-mapped
  * @queued: true when request has been queued to HW
@@ -740,6 +742,7 @@ struct dwc3_request {
 	struct dwc3_trb		*trb;
 	dma_addr_t		trb_dma;
 
+	unsigned		unaligned:1;
 	unsigned		direction:1;
 	unsigned		mapped:1;
 	unsigned		started:1;
@@ -857,12 +860,14 @@ struct dwc3_scratchpad_array {
 struct dwc3 {
 	struct usb_ctrlrequest	*ctrl_req;
 	struct dwc3_trb		*ep0_trb;
+	void			*bounce;
 	void			*ep0_bounce;
 	void			*zlp_buf;
 	void			*scratchbuf;
 	u8			*setup_buf;
 	dma_addr_t		ctrl_req_addr;
 	dma_addr_t		ep0_trb_addr;
+	dma_addr_t		bounce_addr;
 	dma_addr_t		ep0_bounce_addr;
 	dma_addr_t		scratch_addr;
 	struct dwc3_request	ep0_usb_req;
diff --git a/drivers/usb/dwc3/dwc3-exynos.c b/drivers/usb/dwc3/dwc3-exynos.c
index e956306d9b0f..1515d45ebcec 100644
--- a/drivers/usb/dwc3/dwc3-exynos.c
+++ b/drivers/usb/dwc3/dwc3-exynos.c
@@ -128,10 +128,8 @@ static int dwc3_exynos_probe(struct platform_device *pdev)
 	clk_prepare_enable(exynos->clk);
 
 	exynos->susp_clk = devm_clk_get(dev, "usbdrd30_susp_clk");
-	if (IS_ERR(exynos->susp_clk)) {
-		dev_info(dev, "no suspend clk specified\n");
+	if (IS_ERR(exynos->susp_clk))
 		exynos->susp_clk = NULL;
-	}
 	clk_prepare_enable(exynos->susp_clk);
 
 	if (of_device_is_compatible(node, "samsung,exynos7-dwusb3")) {
@@ -290,7 +288,6 @@ static struct platform_driver dwc3_exynos_driver = {
 
 module_platform_driver(dwc3_exynos_driver);
 
-MODULE_ALIAS("platform:exynos-dwc3");
 MODULE_AUTHOR("Anton Tikhomirov <av.tikhomirov@samsung.com>");
 MODULE_LICENSE("GPL v2");
 MODULE_DESCRIPTION("DesignWare USB3 EXYNOS Glue Layer");
diff --git a/drivers/usb/dwc3/dwc3-omap.c b/drivers/usb/dwc3/dwc3-omap.c
index eb1b9cb3f9d1..2092e46b1380 100644
--- a/drivers/usb/dwc3/dwc3-omap.c
+++ b/drivers/usb/dwc3/dwc3-omap.c
@@ -426,20 +426,20 @@ static int dwc3_omap_extcon_register(struct dwc3_omap *omap)
 		}
 
 		omap->vbus_nb.notifier_call = dwc3_omap_vbus_notifier;
-		ret = extcon_register_notifier(edev, EXTCON_USB,
-						&omap->vbus_nb);
+		ret = devm_extcon_register_notifier(omap->dev, edev,
+						EXTCON_USB, &omap->vbus_nb);
 		if (ret < 0)
 			dev_vdbg(omap->dev, "failed to register notifier for USB\n");
 
 		omap->id_nb.notifier_call = dwc3_omap_id_notifier;
-		ret = extcon_register_notifier(edev, EXTCON_USB_HOST,
-						&omap->id_nb);
+		ret = devm_extcon_register_notifier(omap->dev, edev,
+						EXTCON_USB_HOST, &omap->id_nb);
 		if (ret < 0)
 			dev_vdbg(omap->dev, "failed to register notifier for USB-HOST\n");
 
-		if (extcon_get_cable_state_(edev, EXTCON_USB) == true)
+		if (extcon_get_state(edev, EXTCON_USB) == true)
 			dwc3_omap_set_mailbox(omap, OMAP_DWC3_VBUS_VALID);
-		if (extcon_get_cable_state_(edev, EXTCON_USB_HOST) == true)
+		if (extcon_get_state(edev, EXTCON_USB_HOST) == true)
 			dwc3_omap_set_mailbox(omap, OMAP_DWC3_ID_GROUND);
 
 		omap->edev = edev;
@@ -528,17 +528,13 @@ static int dwc3_omap_probe(struct platform_device *pdev)
 	ret = of_platform_populate(node, NULL, NULL, dev);
 	if (ret) {
 		dev_err(&pdev->dev, "failed to create dwc3 core\n");
-		goto err2;
+		goto err1;
 	}
 
 	dwc3_omap_enable_irqs(omap);
 	enable_irq(omap->irq);
 	return 0;
 
-err2:
-	extcon_unregister_notifier(omap->edev, EXTCON_USB, &omap->vbus_nb);
-	extcon_unregister_notifier(omap->edev, EXTCON_USB_HOST, &omap->id_nb);
-
 err1:
 	pm_runtime_put_sync(dev);
 	pm_runtime_disable(dev);
@@ -550,8 +546,6 @@ static int dwc3_omap_remove(struct platform_device *pdev)
 {
 	struct dwc3_omap	*omap = platform_get_drvdata(pdev);
 
-	extcon_unregister_notifier(omap->edev, EXTCON_USB, &omap->vbus_nb);
-	extcon_unregister_notifier(omap->edev, EXTCON_USB_HOST, &omap->id_nb);
 	dwc3_omap_disable_irqs(omap);
 	disable_irq(omap->irq);
 	of_platform_depopulate(omap->dev);
diff --git a/drivers/usb/dwc3/ep0.c b/drivers/usb/dwc3/ep0.c
index 9bb1f8526f3e..e689cede9b0e 100644
--- a/drivers/usb/dwc3/ep0.c
+++ b/drivers/usb/dwc3/ep0.c
@@ -1123,7 +1123,21 @@ static void dwc3_ep0_xfernotready(struct dwc3 *dwc,
 		dwc->ep0state = EP0_STATUS_PHASE;
 
 		if (dwc->delayed_status) {
+			struct dwc3_ep *dep = dwc->eps[0];
+
 			WARN_ON_ONCE(event->endpoint_number != 1);
+			/*
+			 * We should handle the delay STATUS phase here if the
+			 * request for handling delay STATUS has been queued
+			 * into the list.
+			 */
+			if (!list_empty(&dep->pending_list)) {
+				dwc->delayed_status = false;
+				usb_gadget_set_state(&dwc->gadget,
+						     USB_STATE_CONFIGURED);
+				dwc3_ep0_do_control_status(dwc, event);
+			}
+
 			return;
 		}
 
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 204c754cc647..4db97ecae885 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -833,29 +833,14 @@ static void dwc3_gadget_ep_free_request(struct usb_ep *ep,
 
 static u32 dwc3_calc_trbs_left(struct dwc3_ep *dep);
 
-/**
- * dwc3_prepare_one_trb - setup one TRB from one request
- * @dep: endpoint for which this request is prepared
- * @req: dwc3_request pointer
- */
-static void dwc3_prepare_one_trb(struct dwc3_ep *dep,
-		struct dwc3_request *req, dma_addr_t dma,
-		unsigned length, unsigned chain, unsigned node)
+static void __dwc3_prepare_one_trb(struct dwc3_ep *dep, struct dwc3_trb *trb,
+		dma_addr_t dma, unsigned length, unsigned chain, unsigned node,
+		unsigned stream_id, unsigned short_not_ok, unsigned no_interrupt)
 {
-	struct dwc3_trb		*trb;
 	struct dwc3		*dwc = dep->dwc;
 	struct usb_gadget	*gadget = &dwc->gadget;
 	enum usb_device_speed	speed = gadget->speed;
 
-	trb = &dep->trb_pool[dep->trb_enqueue];
-
-	if (!req->trb) {
-		dwc3_gadget_move_started_request(req);
-		req->trb = trb;
-		req->trb_dma = dwc3_trb_dma_offset(dep, trb);
-		dep->queued_requests++;
-	}
-
 	dwc3_ep_inc_enq(dep);
 
 	trb->size = DWC3_TRB_SIZE_LENGTH(length);
@@ -900,11 +885,11 @@ static void dwc3_prepare_one_trb(struct dwc3_ep *dep,
 	if (usb_endpoint_dir_out(dep->endpoint.desc)) {
 		trb->ctrl |= DWC3_TRB_CTRL_CSP;
 
-		if (req->request.short_not_ok)
+		if (short_not_ok)
 			trb->ctrl |= DWC3_TRB_CTRL_ISP_IMI;
 	}
 
-	if ((!req->request.no_interrupt && !chain) ||
+	if ((!no_interrupt && !chain) ||
 			(dwc3_calc_trbs_left(dep) == 0))
 		trb->ctrl |= DWC3_TRB_CTRL_IOC;
 
@@ -912,7 +897,7 @@ static void dwc3_prepare_one_trb(struct dwc3_ep *dep,
 		trb->ctrl |= DWC3_TRB_CTRL_CHN;
 
 	if (usb_endpoint_xfer_bulk(dep->endpoint.desc) && dep->stream_capable)
-		trb->ctrl |= DWC3_TRB_CTRL_SID_SOFN(req->request.stream_id);
+		trb->ctrl |= DWC3_TRB_CTRL_SID_SOFN(stream_id);
 
 	trb->ctrl |= DWC3_TRB_CTRL_HWO;
 
@@ -920,6 +905,36 @@ static void dwc3_prepare_one_trb(struct dwc3_ep *dep,
 }
 
 /**
+ * dwc3_prepare_one_trb - setup one TRB from one request
+ * @dep: endpoint for which this request is prepared
+ * @req: dwc3_request pointer
+ * @chain: should this TRB be chained to the next?
+ * @node: only for isochronous endpoints. First TRB needs different type.
+ */
+static void dwc3_prepare_one_trb(struct dwc3_ep *dep,
+		struct dwc3_request *req, unsigned chain, unsigned node)
+{
+	struct dwc3_trb		*trb;
+	unsigned		length = req->request.length;
+	unsigned		stream_id = req->request.stream_id;
+	unsigned		short_not_ok = req->request.short_not_ok;
+	unsigned		no_interrupt = req->request.no_interrupt;
+	dma_addr_t		dma = req->request.dma;
+
+	trb = &dep->trb_pool[dep->trb_enqueue];
+
+	if (!req->trb) {
+		dwc3_gadget_move_started_request(req);
+		req->trb = trb;
+		req->trb_dma = dwc3_trb_dma_offset(dep, trb);
+		dep->queued_requests++;
+	}
+
+	__dwc3_prepare_one_trb(dep, trb, dma, length, chain, node,
+			stream_id, short_not_ok, no_interrupt);
+}
+
+/**
  * dwc3_ep_prev_trb() - Returns the previous TRB in the ring
  * @dep: The endpoint with the TRB ring
  * @index: The index of the current TRB in the ring
@@ -974,21 +989,36 @@ static void dwc3_prepare_one_trb_sg(struct dwc3_ep *dep,
 {
 	struct scatterlist *sg = req->sg;
 	struct scatterlist *s;
-	unsigned int	length;
-	dma_addr_t	dma;
 	int		i;
 
 	for_each_sg(sg, s, req->num_pending_sgs, i) {
+		unsigned int length = req->request.length;
+		unsigned int maxp = usb_endpoint_maxp(dep->endpoint.desc);
+		unsigned int rem = length % maxp;
 		unsigned chain = true;
 
-		length = sg_dma_len(s);
-		dma = sg_dma_address(s);
-
 		if (sg_is_last(s))
 			chain = false;
 
-		dwc3_prepare_one_trb(dep, req, dma, length,
-				chain, i);
+		if (rem && usb_endpoint_dir_out(dep->endpoint.desc) && !chain) {
+			struct dwc3	*dwc = dep->dwc;
+			struct dwc3_trb	*trb;
+
+			req->unaligned = true;
+
+			/* prepare normal TRB */
+			dwc3_prepare_one_trb(dep, req, true, i);
+
+			/* Now prepare one extra TRB to align transfer size */
+			trb = &dep->trb_pool[dep->trb_enqueue];
+			__dwc3_prepare_one_trb(dep, trb, dwc->bounce_addr,
+					maxp - rem, false, 0,
+					req->request.stream_id,
+					req->request.short_not_ok,
+					req->request.no_interrupt);
+		} else {
+			dwc3_prepare_one_trb(dep, req, chain, i);
+		}
 
 		if (!dwc3_calc_trbs_left(dep))
 			break;
@@ -998,14 +1028,28 @@ static void dwc3_prepare_one_trb_sg(struct dwc3_ep *dep,
 static void dwc3_prepare_one_trb_linear(struct dwc3_ep *dep,
 		struct dwc3_request *req)
 {
-	unsigned int	length;
-	dma_addr_t	dma;
+	unsigned int length = req->request.length;
+	unsigned int maxp = usb_endpoint_maxp(dep->endpoint.desc);
+	unsigned int rem = length % maxp;
+
+	if (rem && usb_endpoint_dir_out(dep->endpoint.desc)) {
+		struct dwc3	*dwc = dep->dwc;
+		struct dwc3_trb	*trb;
 
-	dma = req->request.dma;
-	length = req->request.length;
+		req->unaligned = true;
 
-	dwc3_prepare_one_trb(dep, req, dma, length,
-			false, 0);
+		/* prepare normal TRB */
+		dwc3_prepare_one_trb(dep, req, true, 0);
+
+		/* Now prepare one extra TRB to align transfer size */
+		trb = &dep->trb_pool[dep->trb_enqueue];
+		__dwc3_prepare_one_trb(dep, trb, dwc->bounce_addr, maxp - rem,
+				false, 0, req->request.stream_id,
+				req->request.short_not_ok,
+				req->request.no_interrupt);
+	} else {
+		dwc3_prepare_one_trb(dep, req, false, 0);
+	}
 }
 
 /*
@@ -1335,6 +1379,9 @@ int __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value, int protocol)
 		unsigned transfer_in_flight;
 		unsigned started;
 
+		if (dep->flags & DWC3_EP_STALL)
+			return 0;
+
 		if (dep->number > 1)
 			trb = dwc3_ep_prev_trb(dep, dep->trb_enqueue);
 		else
@@ -1356,6 +1403,8 @@ int __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value, int protocol)
 		else
 			dep->flags |= DWC3_EP_STALL;
 	} else {
+		if (!(dep->flags & DWC3_EP_STALL))
+			return 0;
 
 		ret = dwc3_send_clear_stall_ep_cmd(dep);
 		if (ret)
@@ -1918,6 +1967,44 @@ static int dwc3_gadget_init_hw_endpoints(struct dwc3 *dwc,
 			dep->endpoint.ops = &dwc3_gadget_ep0_ops;
 			if (!epnum)
 				dwc->gadget.ep0 = &dep->endpoint;
+		} else if (direction) {
+			int mdwidth;
+			int size;
+			int ret;
+			int num;
+
+			mdwidth = DWC3_MDWIDTH(dwc->hwparams.hwparams0);
+			/* MDWIDTH is represented in bits, we need it in bytes */
+			mdwidth /= 8;
+
+			size = dwc3_readl(dwc->regs, DWC3_GTXFIFOSIZ(i));
+			size = DWC3_GTXFIFOSIZ_TXFDEF(size);
+
+			/* FIFO Depth is in MDWDITH bytes. Multiply */
+			size *= mdwidth;
+
+			num = size / 1024;
+			if (num == 0)
+				num = 1;
+
+			/*
+			 * FIFO sizes account an extra MDWIDTH * (num + 1) bytes for
+			 * internal overhead. We don't really know how these are used,
+			 * but documentation say it exists.
+			 */
+			size -= mdwidth * (num + 1);
+			size /= num;
+
+			usb_ep_set_maxpacket_limit(&dep->endpoint, size);
+
+			dep->endpoint.max_streams = 15;
+			dep->endpoint.ops = &dwc3_gadget_ep_ops;
+			list_add_tail(&dep->endpoint.ep_list,
+					&dwc->gadget.ep_list);
+
+			ret = dwc3_alloc_trb_pool(dep);
+			if (ret)
+				return ret;
 		} else {
 			int		ret;
 
@@ -2029,6 +2116,16 @@ static int __dwc3_cleanup_done_trbs(struct dwc3 *dwc, struct dwc3_ep *dep,
 	if (chain && (trb->ctrl & DWC3_TRB_CTRL_HWO))
 		trb->ctrl &= ~DWC3_TRB_CTRL_HWO;
 
+	/*
+	 * If we're dealing with unaligned size OUT transfer, we will be left
+	 * with one TRB pending in the ring. We need to manually clear HWO bit
+	 * from that TRB.
+	 */
+	if (req->unaligned && (trb->ctrl & DWC3_TRB_CTRL_HWO)) {
+		trb->ctrl &= ~DWC3_TRB_CTRL_HWO;
+		return 1;
+	}
+
 	if ((trb->ctrl & DWC3_TRB_CTRL_HWO) && status != -ESHUTDOWN)
 		return 1;
 
@@ -2118,6 +2215,13 @@ static int dwc3_cleanup_done_reqs(struct dwc3 *dwc, struct dwc3_ep *dep,
 					event, status, chain);
 		}
 
+		if (req->unaligned) {
+			trb = &dep->trb_pool[dep->trb_dequeue];
+			ret = __dwc3_cleanup_done_trbs(dwc, dep, req, trb,
+					event, status, false);
+			req->unaligned = false;
+		}
+
 		req->request.actual = length - req->remaining;
 
 		if ((req->request.actual < length) && req->num_pending_sgs)
@@ -3019,6 +3123,13 @@ int dwc3_gadget_init(struct dwc3 *dwc)
 		goto err4;
 	}
 
+	dwc->bounce = dma_alloc_coherent(dwc->sysdev, DWC3_BOUNCE_SIZE,
+			&dwc->bounce_addr, GFP_KERNEL);
+	if (!dwc->bounce) {
+		ret = -ENOMEM;
+		goto err5;
+	}
+
 	init_completion(&dwc->ep0_in_setup);
 
 	dwc->gadget.ops			= &dwc3_gadget_ops;
@@ -3050,27 +3161,24 @@ int dwc3_gadget_init(struct dwc3 *dwc)
 	dwc->gadget.max_speed		= dwc->maximum_speed;
 
 	/*
-	 * Per databook, DWC3 needs buffer size to be aligned to MaxPacketSize
-	 * on ep out.
-	 */
-	dwc->gadget.quirk_ep_out_aligned_size = true;
-
-	/*
 	 * REVISIT: Here we should clear all pending IRQs to be
 	 * sure we're starting from a well known location.
 	 */
 
 	ret = dwc3_gadget_init_endpoints(dwc);
 	if (ret)
-		goto err5;
+		goto err6;
 
 	ret = usb_add_gadget_udc(dwc->dev, &dwc->gadget);
 	if (ret) {
 		dev_err(dwc->dev, "failed to register udc\n");
-		goto err5;
+		goto err6;
 	}
 
 	return 0;
+err6:
+	dma_free_coherent(dwc->sysdev, DWC3_BOUNCE_SIZE, dwc->bounce,
+			dwc->bounce_addr);
 
 err5:
 	kfree(dwc->zlp_buf);
@@ -3103,6 +3211,8 @@ void dwc3_gadget_exit(struct dwc3 *dwc)
 
 	dwc3_gadget_free_endpoints(dwc);
 
+	dma_free_coherent(dwc->sysdev, DWC3_BOUNCE_SIZE, dwc->bounce,
+			dwc->bounce_addr);
 	dma_free_coherent(dwc->sysdev, DWC3_EP0_BOUNCE_SIZE,
 			dwc->ep0_bounce, dwc->ep0_bounce_addr);
 
diff --git a/drivers/usb/dwc3/host.c b/drivers/usb/dwc3/host.c
index 487f0ff6ae25..76f0b0df37c1 100644
--- a/drivers/usb/dwc3/host.c
+++ b/drivers/usb/dwc3/host.c
@@ -54,11 +54,12 @@ out:
 
 int dwc3_host_init(struct dwc3 *dwc)
 {
-	struct property_entry	props[2];
+	struct property_entry	props[3];
 	struct platform_device	*xhci;
 	int			ret, irq;
 	struct resource		*res;
 	struct platform_device	*dwc3_pdev = to_platform_device(dwc->dev);
+	int			prop_idx = 0;
 
 	irq = dwc3_host_get_irq(dwc);
 	if (irq < 0)
@@ -97,8 +98,22 @@ int dwc3_host_init(struct dwc3 *dwc)
 
 	memset(props, 0, sizeof(struct property_entry) * ARRAY_SIZE(props));
 
-	if (dwc->usb3_lpm_capable) {
-		props[0].name = "usb3-lpm-capable";
+	if (dwc->usb3_lpm_capable)
+		props[prop_idx++].name = "usb3-lpm-capable";
+
+	/**
+	 * WORKAROUND: dwc3 revisions <=3.00a have a limitation
+	 * where Port Disable command doesn't work.
+	 *
+	 * The suggested workaround is that we avoid Port Disable
+	 * completely.
+	 *
+	 * This following flag tells XHCI to do just that.
+	 */
+	if (dwc->revision <= DWC3_REVISION_300A)
+		props[prop_idx++].name = "quirk-broken-port-ped";
+
+	if (prop_idx) {
 		ret = platform_device_add_properties(xhci, props);
 		if (ret) {
 			dev_err(dwc->dev, "failed to add properties to xHCI\n");
diff --git a/drivers/usb/early/ehci-dbgp.c b/drivers/usb/early/ehci-dbgp.c
index ea73afb026d8..e2654443e8eb 100644
--- a/drivers/usb/early/ehci-dbgp.c
+++ b/drivers/usb/early/ehci-dbgp.c
@@ -580,7 +580,6 @@ try_again:
 				USB_DEBUG_DEVNUM);
 			goto err;
 		}
-		devnum = USB_DEBUG_DEVNUM;
 		dbgp_printk("debug device renamed to 127\n");
 	}
 
diff --git a/drivers/usb/gadget/function/f_fs.c b/drivers/usb/gadget/function/f_fs.c
index e6a17455adac..87fccf611b69 100644
--- a/drivers/usb/gadget/function/f_fs.c
+++ b/drivers/usb/gadget/function/f_fs.c
@@ -1230,7 +1230,7 @@ static long ffs_epfile_ioctl(struct file *file, unsigned code,
 			desc = epfile->ep->descs[desc_idx];
 
 			spin_unlock_irq(&epfile->ffs->eps_lock);
-			ret = copy_to_user((void *)value, desc, sizeof(*desc));
+			ret = copy_to_user((void *)value, desc, desc->bLength);
 			if (ret)
 				ret = -EFAULT;
 			return ret;
@@ -2101,7 +2101,7 @@ static int __ffs_data_do_entity(enum ffs_entity_type type,
 	case FFS_ENDPOINT:
 		d = (void *)desc;
 		helper->eps_count++;
-		if (helper->eps_count >= 15)
+		if (helper->eps_count >= FFS_MAX_EPS_COUNT)
 			return -EINVAL;
 		/* Check if descriptors for any speed were already parsed */
 		if (!helper->ffs->eps_count && !helper->ffs->interfaces_count)
diff --git a/drivers/usb/gadget/function/f_hid.c b/drivers/usb/gadget/function/f_hid.c
index 5f8139b8e601..89b48bcc377a 100644
--- a/drivers/usb/gadget/function/f_hid.c
+++ b/drivers/usb/gadget/function/f_hid.c
@@ -50,12 +50,12 @@ struct f_hidg {
 
 	/* recv report */
 	struct list_head		completed_out_req;
-	spinlock_t			spinlock;
+	spinlock_t			read_spinlock;
 	wait_queue_head_t		read_queue;
 	unsigned int			qlen;
 
 	/* send report */
-	struct mutex			lock;
+	spinlock_t			write_spinlock;
 	bool				write_pending;
 	wait_queue_head_t		write_queue;
 	struct usb_request		*req;
@@ -258,28 +258,35 @@ static ssize_t f_hidg_read(struct file *file, char __user *buffer,
 	if (!access_ok(VERIFY_WRITE, buffer, count))
 		return -EFAULT;
 
-	spin_lock_irqsave(&hidg->spinlock, flags);
+	spin_lock_irqsave(&hidg->read_spinlock, flags);
 
 #define READ_COND (!list_empty(&hidg->completed_out_req))
 
 	/* wait for at least one buffer to complete */
 	while (!READ_COND) {
-		spin_unlock_irqrestore(&hidg->spinlock, flags);
+		spin_unlock_irqrestore(&hidg->read_spinlock, flags);
 		if (file->f_flags & O_NONBLOCK)
 			return -EAGAIN;
 
 		if (wait_event_interruptible(hidg->read_queue, READ_COND))
 			return -ERESTARTSYS;
 
-		spin_lock_irqsave(&hidg->spinlock, flags);
+		spin_lock_irqsave(&hidg->read_spinlock, flags);
 	}
 
 	/* pick the first one */
 	list = list_first_entry(&hidg->completed_out_req,
 				struct f_hidg_req_list, list);
+
+	/*
+	 * Remove this from list to protect it from beign free()
+	 * while host disables our function
+	 */
+	list_del(&list->list);
+
 	req = list->req;
 	count = min_t(unsigned int, count, req->actual - list->pos);
-	spin_unlock_irqrestore(&hidg->spinlock, flags);
+	spin_unlock_irqrestore(&hidg->read_spinlock, flags);
 
 	/* copy to user outside spinlock */
 	count -= copy_to_user(buffer, req->buf + list->pos, count);
@@ -292,15 +299,20 @@ static ssize_t f_hidg_read(struct file *file, char __user *buffer,
 	 * call, taking into account its current read position.
 	 */
 	if (list->pos == req->actual) {
-		spin_lock_irqsave(&hidg->spinlock, flags);
-		list_del(&list->list);
 		kfree(list);
-		spin_unlock_irqrestore(&hidg->spinlock, flags);
 
 		req->length = hidg->report_length;
 		ret = usb_ep_queue(hidg->out_ep, req, GFP_KERNEL);
-		if (ret < 0)
+		if (ret < 0) {
+			free_ep_req(hidg->out_ep, req);
 			return ret;
+		}
+	} else {
+		spin_lock_irqsave(&hidg->read_spinlock, flags);
+		list_add(&list->list, &hidg->completed_out_req);
+		spin_unlock_irqrestore(&hidg->read_spinlock, flags);
+
+		wake_up(&hidg->read_queue);
 	}
 
 	return count;
@@ -309,13 +321,16 @@ static ssize_t f_hidg_read(struct file *file, char __user *buffer,
 static void f_hidg_req_complete(struct usb_ep *ep, struct usb_request *req)
 {
 	struct f_hidg *hidg = (struct f_hidg *)ep->driver_data;
+	unsigned long flags;
 
 	if (req->status != 0) {
 		ERROR(hidg->func.config->cdev,
 			"End Point Request ERROR: %d\n", req->status);
 	}
 
+	spin_lock_irqsave(&hidg->write_spinlock, flags);
 	hidg->write_pending = 0;
+	spin_unlock_irqrestore(&hidg->write_spinlock, flags);
 	wake_up(&hidg->write_queue);
 }
 
@@ -323,18 +338,20 @@ static ssize_t f_hidg_write(struct file *file, const char __user *buffer,
 			    size_t count, loff_t *offp)
 {
 	struct f_hidg *hidg  = file->private_data;
+	struct usb_request *req;
+	unsigned long flags;
 	ssize_t status = -ENOMEM;
 
 	if (!access_ok(VERIFY_READ, buffer, count))
 		return -EFAULT;
 
-	mutex_lock(&hidg->lock);
+	spin_lock_irqsave(&hidg->write_spinlock, flags);
 
 #define WRITE_COND (!hidg->write_pending)
-
+try_again:
 	/* write queue */
 	while (!WRITE_COND) {
-		mutex_unlock(&hidg->lock);
+		spin_unlock_irqrestore(&hidg->write_spinlock, flags);
 		if (file->f_flags & O_NONBLOCK)
 			return -EAGAIN;
 
@@ -342,37 +359,59 @@ static ssize_t f_hidg_write(struct file *file, const char __user *buffer,
 				hidg->write_queue, WRITE_COND))
 			return -ERESTARTSYS;
 
-		mutex_lock(&hidg->lock);
+		spin_lock_irqsave(&hidg->write_spinlock, flags);
 	}
 
+	hidg->write_pending = 1;
+	req = hidg->req;
 	count  = min_t(unsigned, count, hidg->report_length);
+
+	spin_unlock_irqrestore(&hidg->write_spinlock, flags);
 	status = copy_from_user(hidg->req->buf, buffer, count);
 
 	if (status != 0) {
 		ERROR(hidg->func.config->cdev,
 			"copy_from_user error\n");
-		mutex_unlock(&hidg->lock);
-		return -EINVAL;
+		status = -EINVAL;
+		goto release_write_pending;
 	}
 
-	hidg->req->status   = 0;
-	hidg->req->zero     = 0;
-	hidg->req->length   = count;
-	hidg->req->complete = f_hidg_req_complete;
-	hidg->req->context  = hidg;
-	hidg->write_pending = 1;
+	spin_lock_irqsave(&hidg->write_spinlock, flags);
+
+	/* we our function has been disabled by host */
+	if (!hidg->req) {
+		free_ep_req(hidg->in_ep, hidg->req);
+		/*
+		 * TODO
+		 * Should we fail with error here?
+		 */
+		goto try_again;
+	}
+
+	req->status   = 0;
+	req->zero     = 0;
+	req->length   = count;
+	req->complete = f_hidg_req_complete;
+	req->context  = hidg;
 
 	status = usb_ep_queue(hidg->in_ep, hidg->req, GFP_ATOMIC);
 	if (status < 0) {
 		ERROR(hidg->func.config->cdev,
 			"usb_ep_queue error on int endpoint %zd\n", status);
-		hidg->write_pending = 0;
-		wake_up(&hidg->write_queue);
+		goto release_write_pending_unlocked;
 	} else {
 		status = count;
 	}
+	spin_unlock_irqrestore(&hidg->write_spinlock, flags);
 
-	mutex_unlock(&hidg->lock);
+	return status;
+release_write_pending:
+	spin_lock_irqsave(&hidg->write_spinlock, flags);
+release_write_pending_unlocked:
+	hidg->write_pending = 0;
+	spin_unlock_irqrestore(&hidg->write_spinlock, flags);
+
+	wake_up(&hidg->write_queue);
 
 	return status;
 }
@@ -425,20 +464,36 @@ static inline struct usb_request *hidg_alloc_ep_req(struct usb_ep *ep,
 static void hidg_set_report_complete(struct usb_ep *ep, struct usb_request *req)
 {
 	struct f_hidg *hidg = (struct f_hidg *) req->context;
+	struct usb_composite_dev *cdev = hidg->func.config->cdev;
 	struct f_hidg_req_list *req_list;
 	unsigned long flags;
 
-	req_list = kzalloc(sizeof(*req_list), GFP_ATOMIC);
-	if (!req_list)
-		return;
+	switch (req->status) {
+	case 0:
+		req_list = kzalloc(sizeof(*req_list), GFP_ATOMIC);
+		if (!req_list) {
+			ERROR(cdev, "Unable to allocate mem for req_list\n");
+			goto free_req;
+		}
 
-	req_list->req = req;
+		req_list->req = req;
 
-	spin_lock_irqsave(&hidg->spinlock, flags);
-	list_add_tail(&req_list->list, &hidg->completed_out_req);
-	spin_unlock_irqrestore(&hidg->spinlock, flags);
+		spin_lock_irqsave(&hidg->read_spinlock, flags);
+		list_add_tail(&req_list->list, &hidg->completed_out_req);
+		spin_unlock_irqrestore(&hidg->read_spinlock, flags);
 
-	wake_up(&hidg->read_queue);
+		wake_up(&hidg->read_queue);
+		break;
+	default:
+		ERROR(cdev, "Set report failed %d\n", req->status);
+		/* FALLTHROUGH */
+	case -ECONNABORTED:		/* hardware forced ep reset */
+	case -ECONNRESET:		/* request dequeued */
+	case -ESHUTDOWN:		/* disconnect from host */
+free_req:
+		free_ep_req(ep, req);
+		return;
+	}
 }
 
 static int hidg_setup(struct usb_function *f,
@@ -544,20 +599,35 @@ static void hidg_disable(struct usb_function *f)
 {
 	struct f_hidg *hidg = func_to_hidg(f);
 	struct f_hidg_req_list *list, *next;
+	unsigned long flags;
 
 	usb_ep_disable(hidg->in_ep);
 	usb_ep_disable(hidg->out_ep);
 
+	spin_lock_irqsave(&hidg->read_spinlock, flags);
 	list_for_each_entry_safe(list, next, &hidg->completed_out_req, list) {
+		free_ep_req(hidg->out_ep, list->req);
 		list_del(&list->list);
 		kfree(list);
 	}
+	spin_unlock_irqrestore(&hidg->read_spinlock, flags);
+
+	spin_lock_irqsave(&hidg->write_spinlock, flags);
+	if (!hidg->write_pending) {
+		free_ep_req(hidg->in_ep, hidg->req);
+		hidg->write_pending = 1;
+	}
+
+	hidg->req = NULL;
+	spin_unlock_irqrestore(&hidg->write_spinlock, flags);
 }
 
 static int hidg_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
 {
 	struct usb_composite_dev		*cdev = f->config->cdev;
 	struct f_hidg				*hidg = func_to_hidg(f);
+	struct usb_request			*req_in = NULL;
+	unsigned long				flags;
 	int i, status = 0;
 
 	VDBG(cdev, "hidg_set_alt intf:%d alt:%d\n", intf, alt);
@@ -578,6 +648,12 @@ static int hidg_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
 			goto fail;
 		}
 		hidg->in_ep->driver_data = hidg;
+
+		req_in = hidg_alloc_ep_req(hidg->in_ep, hidg->report_length);
+		if (!req_in) {
+			status = -ENOMEM;
+			goto disable_ep_in;
+		}
 	}
 
 
@@ -589,12 +665,12 @@ static int hidg_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
 					    hidg->out_ep);
 		if (status) {
 			ERROR(cdev, "config_ep_by_speed FAILED!\n");
-			goto fail;
+			goto free_req_in;
 		}
 		status = usb_ep_enable(hidg->out_ep);
 		if (status < 0) {
 			ERROR(cdev, "Enable OUT endpoint FAILED!\n");
-			goto fail;
+			goto free_req_in;
 		}
 		hidg->out_ep->driver_data = hidg;
 
@@ -610,17 +686,37 @@ static int hidg_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
 				req->context  = hidg;
 				status = usb_ep_queue(hidg->out_ep, req,
 						      GFP_ATOMIC);
-				if (status)
+				if (status) {
 					ERROR(cdev, "%s queue req --> %d\n",
 						hidg->out_ep->name, status);
+					free_ep_req(hidg->out_ep, req);
+				}
 			} else {
-				usb_ep_disable(hidg->out_ep);
 				status = -ENOMEM;
-				goto fail;
+				goto disable_out_ep;
 			}
 		}
 	}
 
+	if (hidg->in_ep != NULL) {
+		spin_lock_irqsave(&hidg->write_spinlock, flags);
+		hidg->req = req_in;
+		hidg->write_pending = 0;
+		spin_unlock_irqrestore(&hidg->write_spinlock, flags);
+
+		wake_up(&hidg->write_queue);
+	}
+	return 0;
+disable_out_ep:
+	usb_ep_disable(hidg->out_ep);
+free_req_in:
+	if (req_in)
+		free_ep_req(hidg->in_ep, req_in);
+
+disable_ep_in:
+	if (hidg->in_ep)
+		usb_ep_disable(hidg->in_ep);
+
 fail:
 	return status;
 }
@@ -669,12 +765,6 @@ static int hidg_bind(struct usb_configuration *c, struct usb_function *f)
 		goto fail;
 	hidg->out_ep = ep;
 
-	/* preallocate request and buffer */
-	status = -ENOMEM;
-	hidg->req = alloc_ep_req(hidg->in_ep, hidg->report_length);
-	if (!hidg->req)
-		goto fail;
-
 	/* set descriptor dynamic values */
 	hidg_interface_desc.bInterfaceSubClass = hidg->bInterfaceSubClass;
 	hidg_interface_desc.bInterfaceProtocol = hidg->bInterfaceProtocol;
@@ -711,8 +801,10 @@ static int hidg_bind(struct usb_configuration *c, struct usb_function *f)
 	if (status)
 		goto fail;
 
-	mutex_init(&hidg->lock);
-	spin_lock_init(&hidg->spinlock);
+	spin_lock_init(&hidg->write_spinlock);
+	hidg->write_pending = 1;
+	hidg->req = NULL;
+	spin_lock_init(&hidg->read_spinlock);
 	init_waitqueue_head(&hidg->write_queue);
 	init_waitqueue_head(&hidg->read_queue);
 	INIT_LIST_HEAD(&hidg->completed_out_req);
@@ -976,10 +1068,6 @@ static void hidg_unbind(struct usb_configuration *c, struct usb_function *f)
 	device_destroy(hidg_class, MKDEV(major, hidg->minor));
 	cdev_del(&hidg->cdev);
 
-	/* disable/free request and end point */
-	usb_ep_disable(hidg->in_ep);
-	free_ep_req(hidg->in_ep, hidg->req);
-
 	usb_free_all_descriptors(f);
 }
 
diff --git a/drivers/usb/gadget/function/f_printer.c b/drivers/usb/gadget/function/f_printer.c
index 8054da9276dd..8df244fc9d80 100644
--- a/drivers/usb/gadget/function/f_printer.c
+++ b/drivers/usb/gadget/function/f_printer.c
@@ -49,7 +49,6 @@
 
 #include "u_printer.h"
 
-#define PNP_STRING_LEN		1024
 #define PRINTER_MINORS		4
 #define GET_DEVICE_ID		0
 #define GET_PORT_STATUS		1
@@ -907,8 +906,7 @@ static bool gprinter_req_match(struct usb_function *f,
 	switch (ctrl->bRequest) {
 	case GET_DEVICE_ID:
 		w_index >>= 8;
-		if (w_length <= PNP_STRING_LEN &&
-		    (USB_DIR_IN & ctrl->bRequestType))
+		if (USB_DIR_IN & ctrl->bRequestType)
 			break;
 		return false;
 	case GET_PORT_STATUS:
@@ -937,6 +935,7 @@ static int printer_func_setup(struct usb_function *f,
 	struct printer_dev *dev = func_to_printer(f);
 	struct usb_composite_dev *cdev = f->config->cdev;
 	struct usb_request	*req = cdev->req;
+	u8			*buf = req->buf;
 	int			value = -EOPNOTSUPP;
 	u16			wIndex = le16_to_cpu(ctrl->wIndex);
 	u16			wValue = le16_to_cpu(ctrl->wValue);
@@ -953,10 +952,16 @@ static int printer_func_setup(struct usb_function *f,
 			if ((wIndex>>8) != dev->interface)
 				break;
 
-			value = (dev->pnp_string[0] << 8) | dev->pnp_string[1];
-			memcpy(req->buf, dev->pnp_string, value);
+			if (!dev->pnp_string) {
+				value = 0;
+				break;
+			}
+			value = strlen(dev->pnp_string);
+			buf[0] = (value >> 8) & 0xFF;
+			buf[1] = value & 0xFF;
+			memcpy(buf + 2, dev->pnp_string, value);
 			DBG(dev, "1284 PNP String: %x %s\n", value,
-					&dev->pnp_string[2]);
+			    dev->pnp_string);
 			break;
 
 		case GET_PORT_STATUS: /* Get Port Status */
@@ -964,7 +969,7 @@ static int printer_func_setup(struct usb_function *f,
 			if (wIndex != dev->interface)
 				break;
 
-			*(u8 *)req->buf = dev->printer_status;
+			buf[0] = dev->printer_status;
 			value = min_t(u16, wLength, 1);
 			break;
 
@@ -1157,10 +1162,21 @@ static ssize_t f_printer_opts_pnp_string_show(struct config_item *item,
 					      char *page)
 {
 	struct f_printer_opts *opts = to_f_printer_opts(item);
-	int result;
+	int result = 0;
 
 	mutex_lock(&opts->lock);
-	result = strlcpy(page, opts->pnp_string + 2, PNP_STRING_LEN - 2);
+	if (!opts->pnp_string)
+		goto unlock;
+
+	result = strlcpy(page, opts->pnp_string, PAGE_SIZE);
+	if (result >= PAGE_SIZE) {
+		result = PAGE_SIZE;
+	} else if (page[result - 1] != '\n' && result + 1 < PAGE_SIZE) {
+		page[result++] = '\n';
+		page[result] = '\0';
+	}
+
+unlock:
 	mutex_unlock(&opts->lock);
 
 	return result;
@@ -1170,13 +1186,24 @@ static ssize_t f_printer_opts_pnp_string_store(struct config_item *item,
 					       const char *page, size_t len)
 {
 	struct f_printer_opts *opts = to_f_printer_opts(item);
-	int result, l;
+	char *new_pnp;
+	int result;
 
 	mutex_lock(&opts->lock);
-	result = strlcpy(opts->pnp_string + 2, page, PNP_STRING_LEN - 2);
-	l = strlen(opts->pnp_string + 2) + 2;
-	opts->pnp_string[0] = (l >> 8) & 0xFF;
-	opts->pnp_string[1] = l & 0xFF;
+
+	new_pnp = kstrndup(page, len, GFP_KERNEL);
+	if (!new_pnp) {
+		result = -ENOMEM;
+		goto unlock;
+	}
+
+	if (opts->pnp_string_allocated)
+		kfree(opts->pnp_string);
+
+	opts->pnp_string_allocated = true;
+	opts->pnp_string = new_pnp;
+	result = len;
+unlock:
 	mutex_unlock(&opts->lock);
 
 	return result;
@@ -1270,6 +1297,8 @@ static void gprinter_free_inst(struct usb_function_instance *f)
 
 	mutex_unlock(&printer_ida_lock);
 
+	if (opts->pnp_string_allocated)
+		kfree(opts->pnp_string);
 	kfree(opts);
 }
 
diff --git a/drivers/usb/gadget/function/f_uac2.c b/drivers/usb/gadget/function/f_uac2.c
index 969cfe741380..f6a0d3a1311b 100644
--- a/drivers/usb/gadget/function/f_uac2.c
+++ b/drivers/usb/gadget/function/f_uac2.c
@@ -22,9 +22,6 @@
 
 #include "u_uac2.h"
 
-/* Keep everyone on toes */
-#define USB_XFERS	2
-
 /*
  * The driver implements a simple UAC_2 topology.
  * USB-OUT -> IT_1 -> OT_3 -> ALSA_Capture
@@ -78,7 +75,7 @@ struct uac2_rtd_params {
 	size_t period_size;
 
 	unsigned max_psize;
-	struct uac2_req ureq[USB_XFERS];
+	struct uac2_req *ureq;
 
 	spinlock_t lock;
 };
@@ -269,6 +266,8 @@ static int
 uac2_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
 {
 	struct snd_uac2_chip *uac2 = snd_pcm_substream_chip(substream);
+	struct audio_dev *agdev = uac2_to_agdev(uac2);
+	struct f_uac2_opts *uac2_opts = agdev_to_uac2_opts(agdev);
 	struct uac2_rtd_params *prm;
 	unsigned long flags;
 	int err = 0;
@@ -300,7 +299,7 @@ uac2_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
 
 	/* Clear buffer after Play stops */
 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && !prm->ss)
-		memset(prm->rbuf, 0, prm->max_psize * USB_XFERS);
+		memset(prm->rbuf, 0, prm->max_psize * uac2_opts->req_number);
 
 	return err;
 }
@@ -943,6 +942,8 @@ static inline void
 free_ep(struct uac2_rtd_params *prm, struct usb_ep *ep)
 {
 	struct snd_uac2_chip *uac2 = prm->uac2;
+	struct audio_dev *agdev = uac2_to_agdev(uac2);
+	struct f_uac2_opts *uac2_opts = agdev_to_uac2_opts(agdev);
 	int i;
 
 	if (!prm->ep_enabled)
@@ -950,7 +951,7 @@ free_ep(struct uac2_rtd_params *prm, struct usb_ep *ep)
 
 	prm->ep_enabled = false;
 
-	for (i = 0; i < USB_XFERS; i++) {
+	for (i = 0; i < uac2_opts->req_number; i++) {
 		if (prm->ureq[i].req) {
 			usb_ep_dequeue(ep, prm->ureq[i].req);
 			usb_ep_free_request(ep, prm->ureq[i].req);
@@ -1095,31 +1096,47 @@ afunc_bind(struct usb_configuration *cfg, struct usb_function *fn)
 
 	prm = &agdev->uac2.c_prm;
 	prm->max_psize = hs_epout_desc.wMaxPacketSize;
-	prm->rbuf = kzalloc(prm->max_psize * USB_XFERS, GFP_KERNEL);
+	prm->ureq = kcalloc(uac2_opts->req_number, sizeof(struct uac2_req),
+			GFP_KERNEL);
+	if (!prm->ureq) {
+		ret = -ENOMEM;
+		goto err_free_descs;
+	}
+	prm->rbuf = kcalloc(uac2_opts->req_number, prm->max_psize, GFP_KERNEL);
 	if (!prm->rbuf) {
 		prm->max_psize = 0;
+		ret = -ENOMEM;
 		goto err_free_descs;
 	}
 
 	prm = &agdev->uac2.p_prm;
 	prm->max_psize = hs_epin_desc.wMaxPacketSize;
-	prm->rbuf = kzalloc(prm->max_psize * USB_XFERS, GFP_KERNEL);
+	prm->ureq = kcalloc(uac2_opts->req_number, sizeof(struct uac2_req),
+			GFP_KERNEL);
+	if (!prm->ureq) {
+		ret = -ENOMEM;
+		goto err_free_descs;
+	}
+	prm->rbuf = kcalloc(uac2_opts->req_number, prm->max_psize, GFP_KERNEL);
 	if (!prm->rbuf) {
 		prm->max_psize = 0;
-		goto err;
+		ret = -ENOMEM;
+		goto err_no_memory;
 	}
 
 	ret = alsa_uac2_init(agdev);
 	if (ret)
-		goto err;
+		goto err_no_memory;
 	return 0;
 
-err:
+err_no_memory:
+	kfree(agdev->uac2.p_prm.ureq);
+	kfree(agdev->uac2.c_prm.ureq);
 	kfree(agdev->uac2.p_prm.rbuf);
 	kfree(agdev->uac2.c_prm.rbuf);
 err_free_descs:
 	usb_free_all_descriptors(fn);
-	return -EINVAL;
+	return ret;
 }
 
 static int
@@ -1127,6 +1144,7 @@ afunc_set_alt(struct usb_function *fn, unsigned intf, unsigned alt)
 {
 	struct usb_composite_dev *cdev = fn->config->cdev;
 	struct audio_dev *agdev = func_to_agdev(fn);
+	struct f_uac2_opts *opts = agdev_to_uac2_opts(agdev);
 	struct snd_uac2_chip *uac2 = &agdev->uac2;
 	struct usb_gadget *gadget = cdev->gadget;
 	struct device *dev = &uac2->pdev.dev;
@@ -1157,7 +1175,6 @@ afunc_set_alt(struct usb_function *fn, unsigned intf, unsigned alt)
 		agdev->as_out_alt = alt;
 		req_len = prm->max_psize;
 	} else if (intf == agdev->as_in_intf) {
-		struct f_uac2_opts *opts = agdev_to_uac2_opts(agdev);
 		unsigned int factor, rate;
 		struct usb_endpoint_descriptor *ep_desc;
 
@@ -1203,7 +1220,7 @@ afunc_set_alt(struct usb_function *fn, unsigned intf, unsigned alt)
 	prm->ep_enabled = true;
 	usb_ep_enable(ep);
 
-	for (i = 0; i < USB_XFERS; i++) {
+	for (i = 0; i < opts->req_number; i++) {
 		if (!prm->ureq[i].req) {
 			req = usb_ep_alloc_request(ep, GFP_ATOMIC);
 			if (req == NULL)
@@ -1487,6 +1504,7 @@ UAC2_ATTRIBUTE(p_ssize);
 UAC2_ATTRIBUTE(c_chmask);
 UAC2_ATTRIBUTE(c_srate);
 UAC2_ATTRIBUTE(c_ssize);
+UAC2_ATTRIBUTE(req_number);
 
 static struct configfs_attribute *f_uac2_attrs[] = {
 	&f_uac2_opts_attr_p_chmask,
@@ -1495,6 +1513,7 @@ static struct configfs_attribute *f_uac2_attrs[] = {
 	&f_uac2_opts_attr_c_chmask,
 	&f_uac2_opts_attr_c_srate,
 	&f_uac2_opts_attr_c_ssize,
+	&f_uac2_opts_attr_req_number,
 	NULL,
 };
 
@@ -1532,6 +1551,7 @@ static struct usb_function_instance *afunc_alloc_inst(void)
 	opts->c_chmask = UAC2_DEF_CCHMASK;
 	opts->c_srate = UAC2_DEF_CSRATE;
 	opts->c_ssize = UAC2_DEF_CSSIZE;
+	opts->req_number = UAC2_DEF_REQ_NUM;
 	return &opts->func_inst;
 }
 
@@ -1560,6 +1580,7 @@ static void afunc_unbind(struct usb_configuration *c, struct usb_function *f)
 
 	prm = &agdev->uac2.c_prm;
 	kfree(prm->rbuf);
+	kfree(prm->ureq);
 	usb_free_all_descriptors(f);
 }
 
diff --git a/drivers/usb/gadget/function/u_ether.c b/drivers/usb/gadget/function/u_ether.c
index b4e5d6dfd549..c3cab77181d4 100644
--- a/drivers/usb/gadget/function/u_ether.c
+++ b/drivers/usb/gadget/function/u_ether.c
@@ -913,9 +913,16 @@ EXPORT_SYMBOL_GPL(gether_set_dev_addr);
 int gether_get_dev_addr(struct net_device *net, char *dev_addr, int len)
 {
 	struct eth_dev *dev;
+	int ret;
 
 	dev = netdev_priv(net);
-	return get_ether_addr_str(dev->dev_mac, dev_addr, len);
+	ret = get_ether_addr_str(dev->dev_mac, dev_addr, len);
+	if (ret + 1 < len) {
+		dev_addr[ret++] = '\n';
+		dev_addr[ret] = '\0';
+	}
+
+	return ret;
 }
 EXPORT_SYMBOL_GPL(gether_get_dev_addr);
 
@@ -935,9 +942,16 @@ EXPORT_SYMBOL_GPL(gether_set_host_addr);
 int gether_get_host_addr(struct net_device *net, char *host_addr, int len)
 {
 	struct eth_dev *dev;
+	int ret;
 
 	dev = netdev_priv(net);
-	return get_ether_addr_str(dev->host_mac, host_addr, len);
+	ret = get_ether_addr_str(dev->host_mac, host_addr, len);
+	if (ret + 1 < len) {
+		host_addr[ret++] = '\n';
+		host_addr[ret] = '\0';
+	}
+
+	return ret;
 }
 EXPORT_SYMBOL_GPL(gether_get_host_addr);
 
@@ -984,10 +998,12 @@ EXPORT_SYMBOL_GPL(gether_get_qmult);
 
 int gether_get_ifname(struct net_device *net, char *name, int len)
 {
+	int ret;
+
 	rtnl_lock();
-	strlcpy(name, netdev_name(net), len);
+	ret = snprintf(name, len, "%s\n", netdev_name(net));
 	rtnl_unlock();
-	return strlen(name);
+	return ret < len ? ret : len;
 }
 EXPORT_SYMBOL_GPL(gether_get_ifname);
 
diff --git a/drivers/usb/gadget/function/u_ether_configfs.h b/drivers/usb/gadget/function/u_ether_configfs.h
index 4f47289fcf7c..c71133de17e7 100644
--- a/drivers/usb/gadget/function/u_ether_configfs.h
+++ b/drivers/usb/gadget/function/u_ether_configfs.h
@@ -108,7 +108,7 @@
 		mutex_lock(&opts->lock);				\
 		qmult = gether_get_qmult(opts->net);			\
 		mutex_unlock(&opts->lock);				\
-		return sprintf(page, "%d", qmult);			\
+		return sprintf(page, "%d\n", qmult);			\
 	}								\
 									\
 	static ssize_t _f_##_opts_qmult_store(struct config_item *item, \
diff --git a/drivers/usb/gadget/function/u_fs.h b/drivers/usb/gadget/function/u_fs.h
index 60139854e0b1..4b6969451cdc 100644
--- a/drivers/usb/gadget/function/u_fs.h
+++ b/drivers/usb/gadget/function/u_fs.h
@@ -247,7 +247,8 @@ struct ffs_data {
 
 	unsigned			user_flags;
 
-	u8				eps_addrmap[15];
+#define FFS_MAX_EPS_COUNT 31
+	u8				eps_addrmap[FFS_MAX_EPS_COUNT];
 
 	unsigned short			strings_count;
 	unsigned short			interfaces_count;
diff --git a/drivers/usb/gadget/function/u_printer.h b/drivers/usb/gadget/function/u_printer.h
index 0e2c49d4274e..8d30b7577f87 100644
--- a/drivers/usb/gadget/function/u_printer.h
+++ b/drivers/usb/gadget/function/u_printer.h
@@ -18,12 +18,11 @@
 
 #include <linux/usb/composite.h>
 
-#define PNP_STRING_LEN			1024
-
 struct f_printer_opts {
 	struct usb_function_instance	func_inst;
 	int				minor;
-	char				pnp_string[PNP_STRING_LEN];
+	char				*pnp_string;
+	bool				pnp_string_allocated;
 	unsigned			q_len;
 
 	/*
diff --git a/drivers/usb/gadget/function/u_uac2.h b/drivers/usb/gadget/function/u_uac2.h
index 78dd37279bd4..19eeb83538a5 100644
--- a/drivers/usb/gadget/function/u_uac2.h
+++ b/drivers/usb/gadget/function/u_uac2.h
@@ -24,6 +24,7 @@
 #define UAC2_DEF_CCHMASK 0x3
 #define UAC2_DEF_CSRATE 64000
 #define UAC2_DEF_CSSIZE 2
+#define UAC2_DEF_REQ_NUM 2
 
 struct f_uac2_opts {
 	struct usb_function_instance	func_inst;
@@ -33,6 +34,7 @@ struct f_uac2_opts {
 	int				c_chmask;
 	int				c_srate;
 	int				c_ssize;
+	int				req_number;
 	bool				bound;
 
 	struct mutex			lock;
diff --git a/drivers/usb/gadget/legacy/audio.c b/drivers/usb/gadget/legacy/audio.c
index 5d7b3c6a422b..8a39f42a4d56 100644
--- a/drivers/usb/gadget/legacy/audio.c
+++ b/drivers/usb/gadget/legacy/audio.c
@@ -229,6 +229,7 @@ static int audio_bind(struct usb_composite_dev *cdev)
 	uac2_opts->c_chmask = c_chmask;
 	uac2_opts->c_srate = c_srate;
 	uac2_opts->c_ssize = c_ssize;
+	uac2_opts->req_number = UAC2_DEF_REQ_NUM;
 #else
 	uac1_opts = container_of(fi_uac1, struct f_uac1_opts, func_inst);
 	uac1_opts->fn_play = fn_play;
diff --git a/drivers/usb/gadget/legacy/printer.c b/drivers/usb/gadget/legacy/printer.c
index 6f969a86175c..4c9cfff34a03 100644
--- a/drivers/usb/gadget/legacy/printer.c
+++ b/drivers/usb/gadget/legacy/printer.c
@@ -88,8 +88,8 @@ static const struct usb_descriptor_header *otg_desc[2];
 
 static char				product_desc [40] = DRIVER_DESC;
 static char				serial_num [40] = "1";
-static char				pnp_string[PNP_STRING_LEN] =
-	"XXMFG:linux;MDL:g_printer;CLS:PRINTER;SN:1;";
+static char				*pnp_string =
+	"MFG:linux;MDL:g_printer;CLS:PRINTER;SN:1;";
 
 /* static strings, in UTF-8 */
 static struct usb_string		strings [] = {
@@ -143,23 +143,29 @@ static int printer_do_config(struct usb_configuration *c)
 static int printer_bind(struct usb_composite_dev *cdev)
 {
 	struct f_printer_opts *opts;
-	int ret, len;
+	int ret;
 
 	fi_printer = usb_get_function_instance("printer");
 	if (IS_ERR(fi_printer))
 		return PTR_ERR(fi_printer);
 
-	if (iPNPstring)
-		strlcpy(&pnp_string[2], iPNPstring, PNP_STRING_LEN - 2);
-
-	len = strlen(pnp_string);
-	pnp_string[0] = (len >> 8) & 0xFF;
-	pnp_string[1] = len & 0xFF;
-
 	opts = container_of(fi_printer, struct f_printer_opts, func_inst);
 	opts->minor = 0;
-	memcpy(opts->pnp_string, pnp_string, PNP_STRING_LEN);
 	opts->q_len = QLEN;
+	if (iPNPstring) {
+		opts->pnp_string = kstrdup(iPNPstring, GFP_KERNEL);
+		if (!opts->pnp_string) {
+			ret = -ENOMEM;
+			goto fail_put_func_inst;
+		}
+		opts->pnp_string_allocated = true;
+		/*
+		 * we don't free this memory in case of error
+		 * as printer cleanup func will do this for us
+		 */
+	} else {
+		opts->pnp_string = pnp_string;
+	}
 
 	ret = usb_string_ids_tab(cdev, strings);
 	if (ret < 0)
diff --git a/drivers/usb/gadget/udc/Kconfig b/drivers/usb/gadget/udc/Kconfig
index 658b8da60915..4b69f28a9af9 100644
--- a/drivers/usb/gadget/udc/Kconfig
+++ b/drivers/usb/gadget/udc/Kconfig
@@ -60,6 +60,20 @@ config USB_ATMEL_USBA
 	  USBA is the integrated high-speed USB Device controller on
 	  the AT32AP700x, some AT91SAM9 and AT91CAP9 processors from Atmel.
 
+	  The fifo_mode parameter is used to select endpoint allocation mode.
+	  fifo_mode = 0 is used to let the driver autoconfigure the endpoints.
+	  In this case 2 banks are allocated for isochronous endpoints and
+	  only one bank is allocated for the rest of the endpoints.
+
+	  fifo_mode = 1 is a generic maximum fifo size (1024 bytes) configuration
+	  allowing the usage of ep1 - ep6
+
+	  fifo_mode = 2 is a generic performance maximum fifo size (1024 bytes)
+	  configuration allowing the usage of ep1 - ep3
+
+	  fifo_mode = 3 is a balanced performance configuration allowing the
+	  the usage of ep1 - ep8
+
 config USB_BCM63XX_UDC
 	tristate "Broadcom BCM63xx Peripheral Controller"
 	depends on BCM63XX
diff --git a/drivers/usb/gadget/udc/atmel_usba_udc.c b/drivers/usb/gadget/udc/atmel_usba_udc.c
index 12c7687216e6..11bbce28bc23 100644
--- a/drivers/usb/gadget/udc/atmel_usba_udc.c
+++ b/drivers/usb/gadget/udc/atmel_usba_udc.c
@@ -20,6 +20,7 @@
 #include <linux/mfd/syscon.h>
 #include <linux/platform_device.h>
 #include <linux/regmap.h>
+#include <linux/ctype.h>
 #include <linux/usb/ch9.h>
 #include <linux/usb/gadget.h>
 #include <linux/usb/atmel_usba_udc.h>
@@ -318,6 +319,91 @@ static inline void usba_cleanup_debugfs(struct usba_udc *udc)
 }
 #endif
 
+static ushort fifo_mode;
+
+/* "modprobe ... fifo_mode=1" etc */
+module_param(fifo_mode, ushort, 0x0);
+MODULE_PARM_DESC(fifo_mode, "Endpoint configuration mode");
+
+/* mode 0 - uses autoconfig */
+
+/* mode 1 - fits in 8KB, generic max fifo configuration */
+static struct usba_fifo_cfg mode_1_cfg[] = {
+{ .hw_ep_num = 0, .fifo_size = 64,	.nr_banks = 1, },
+{ .hw_ep_num = 1, .fifo_size = 1024,	.nr_banks = 2, },
+{ .hw_ep_num = 2, .fifo_size = 1024,	.nr_banks = 1, },
+{ .hw_ep_num = 3, .fifo_size = 1024,	.nr_banks = 1, },
+{ .hw_ep_num = 4, .fifo_size = 1024,	.nr_banks = 1, },
+{ .hw_ep_num = 5, .fifo_size = 1024,	.nr_banks = 1, },
+{ .hw_ep_num = 6, .fifo_size = 1024,	.nr_banks = 1, },
+};
+
+/* mode 2 - fits in 8KB, performance max fifo configuration */
+static struct usba_fifo_cfg mode_2_cfg[] = {
+{ .hw_ep_num = 0, .fifo_size = 64,	.nr_banks = 1, },
+{ .hw_ep_num = 1, .fifo_size = 1024,	.nr_banks = 3, },
+{ .hw_ep_num = 2, .fifo_size = 1024,	.nr_banks = 2, },
+{ .hw_ep_num = 3, .fifo_size = 1024,	.nr_banks = 2, },
+};
+
+/* mode 3 - fits in 8KB, mixed fifo configuration */
+static struct usba_fifo_cfg mode_3_cfg[] = {
+{ .hw_ep_num = 0, .fifo_size = 64,	.nr_banks = 1, },
+{ .hw_ep_num = 1, .fifo_size = 1024,	.nr_banks = 2, },
+{ .hw_ep_num = 2, .fifo_size = 512,	.nr_banks = 2, },
+{ .hw_ep_num = 3, .fifo_size = 512,	.nr_banks = 2, },
+{ .hw_ep_num = 4, .fifo_size = 512,	.nr_banks = 2, },
+{ .hw_ep_num = 5, .fifo_size = 512,	.nr_banks = 2, },
+{ .hw_ep_num = 6, .fifo_size = 512,	.nr_banks = 2, },
+};
+
+/* mode 4 - fits in 8KB, custom fifo configuration */
+static struct usba_fifo_cfg mode_4_cfg[] = {
+{ .hw_ep_num = 0, .fifo_size = 64,	.nr_banks = 1, },
+{ .hw_ep_num = 1, .fifo_size = 512,	.nr_banks = 2, },
+{ .hw_ep_num = 2, .fifo_size = 512,	.nr_banks = 2, },
+{ .hw_ep_num = 3, .fifo_size = 8,	.nr_banks = 2, },
+{ .hw_ep_num = 4, .fifo_size = 512,	.nr_banks = 2, },
+{ .hw_ep_num = 5, .fifo_size = 512,	.nr_banks = 2, },
+{ .hw_ep_num = 6, .fifo_size = 16,	.nr_banks = 2, },
+{ .hw_ep_num = 7, .fifo_size = 8,	.nr_banks = 2, },
+{ .hw_ep_num = 8, .fifo_size = 8,	.nr_banks = 2, },
+};
+/* Add additional configurations here */
+
+int usba_config_fifo_table(struct usba_udc *udc)
+{
+	int n;
+
+	switch (fifo_mode) {
+	default:
+		fifo_mode = 0;
+	case 0:
+		udc->fifo_cfg = NULL;
+		n = 0;
+		break;
+	case 1:
+		udc->fifo_cfg = mode_1_cfg;
+		n = ARRAY_SIZE(mode_1_cfg);
+		break;
+	case 2:
+		udc->fifo_cfg = mode_2_cfg;
+		n = ARRAY_SIZE(mode_2_cfg);
+		break;
+	case 3:
+		udc->fifo_cfg = mode_3_cfg;
+		n = ARRAY_SIZE(mode_3_cfg);
+		break;
+	case 4:
+		udc->fifo_cfg = mode_4_cfg;
+		n = ARRAY_SIZE(mode_4_cfg);
+		break;
+	}
+	DBG(DBG_HW, "Setup fifo_mode %d\n", fifo_mode);
+
+	return n;
+}
+
 static inline u32 usba_int_enb_get(struct usba_udc *udc)
 {
 	return udc->int_enb_cache;
@@ -543,24 +629,17 @@ usba_ep_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
 	ep->is_isoc = 0;
 	ep->is_in = 0;
 
-	if (maxpacket <= 8)
-		ept_cfg = USBA_BF(EPT_SIZE, USBA_EPT_SIZE_8);
-	else
-		/* LSB is bit 1, not 0 */
-		ept_cfg = USBA_BF(EPT_SIZE, fls(maxpacket - 1) - 3);
-
-	DBG(DBG_HW, "%s: EPT_SIZE = %lu (maxpacket = %lu)\n",
+	DBG(DBG_ERR, "%s: EPT_CFG = 0x%lx (maxpacket = %lu)\n",
 			ep->ep.name, ept_cfg, maxpacket);
 
 	if (usb_endpoint_dir_in(desc)) {
 		ep->is_in = 1;
-		ept_cfg |= USBA_EPT_DIR_IN;
+		ep->ept_cfg |= USBA_EPT_DIR_IN;
 	}
 
 	switch (usb_endpoint_type(desc)) {
 	case USB_ENDPOINT_XFER_CONTROL:
-		ept_cfg |= USBA_BF(EPT_TYPE, USBA_EPT_TYPE_CONTROL);
-		ept_cfg |= USBA_BF(BK_NUMBER, USBA_BK_NUMBER_ONE);
+		ep->ept_cfg |= USBA_BF(EPT_TYPE, USBA_EPT_TYPE_CONTROL);
 		break;
 	case USB_ENDPOINT_XFER_ISOC:
 		if (!ep->can_isoc) {
@@ -578,24 +657,15 @@ usba_ep_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
 			return -EINVAL;
 
 		ep->is_isoc = 1;
-		ept_cfg |= USBA_BF(EPT_TYPE, USBA_EPT_TYPE_ISO);
+		ep->ept_cfg |= USBA_BF(EPT_TYPE, USBA_EPT_TYPE_ISO);
+		ep->ept_cfg |= USBA_BF(NB_TRANS, nr_trans);
 
-		/*
-		 * Do triple-buffering on high-bandwidth iso endpoints.
-		 */
-		if (nr_trans > 1 && ep->nr_banks == 3)
-			ept_cfg |= USBA_BF(BK_NUMBER, USBA_BK_NUMBER_TRIPLE);
-		else
-			ept_cfg |= USBA_BF(BK_NUMBER, USBA_BK_NUMBER_DOUBLE);
-		ept_cfg |= USBA_BF(NB_TRANS, nr_trans);
 		break;
 	case USB_ENDPOINT_XFER_BULK:
-		ept_cfg |= USBA_BF(EPT_TYPE, USBA_EPT_TYPE_BULK);
-		ept_cfg |= USBA_BF(BK_NUMBER, USBA_BK_NUMBER_DOUBLE);
+		ep->ept_cfg |= USBA_BF(EPT_TYPE, USBA_EPT_TYPE_BULK);
 		break;
 	case USB_ENDPOINT_XFER_INT:
-		ept_cfg |= USBA_BF(EPT_TYPE, USBA_EPT_TYPE_INT);
-		ept_cfg |= USBA_BF(BK_NUMBER, USBA_BK_NUMBER_DOUBLE);
+		ep->ept_cfg |= USBA_BF(EPT_TYPE, USBA_EPT_TYPE_INT);
 		break;
 	}
 
@@ -604,7 +674,7 @@ usba_ep_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
 	ep->ep.desc = desc;
 	ep->ep.maxpacket = maxpacket;
 
-	usba_ep_writel(ep, CFG, ept_cfg);
+	usba_ep_writel(ep, CFG, ep->ept_cfg);
 	usba_ep_writel(ep, CTL_ENB, USBA_EPT_ENABLE);
 
 	if (ep->can_dma) {
@@ -1006,12 +1076,81 @@ static int atmel_usba_start(struct usb_gadget *gadget,
 		struct usb_gadget_driver *driver);
 static int atmel_usba_stop(struct usb_gadget *gadget);
 
+static struct usb_ep *atmel_usba_match_ep(
+		struct usb_gadget		*gadget,
+		struct usb_endpoint_descriptor	*desc,
+		struct usb_ss_ep_comp_descriptor *ep_comp
+)
+{
+	struct usb_ep	*_ep;
+	struct usba_ep *ep;
+
+	/* Look at endpoints until an unclaimed one looks usable */
+	list_for_each_entry(_ep, &gadget->ep_list, ep_list) {
+		if (usb_gadget_ep_match_desc(gadget, _ep, desc, ep_comp))
+			goto found_ep;
+	}
+	/* Fail */
+	return NULL;
+
+found_ep:
+
+	if (fifo_mode == 0) {
+		/* Optimize hw fifo size based on ep type and other info */
+		ep = to_usba_ep(_ep);
+
+		switch (usb_endpoint_type(desc)) {
+
+		case USB_ENDPOINT_XFER_CONTROL:
+			break;
+
+		case USB_ENDPOINT_XFER_ISOC:
+			ep->fifo_size = 1024;
+			ep->nr_banks = 2;
+			break;
+
+		case USB_ENDPOINT_XFER_BULK:
+			ep->fifo_size = 512;
+			ep->nr_banks = 1;
+			break;
+
+		case USB_ENDPOINT_XFER_INT:
+			if (desc->wMaxPacketSize == 0)
+				ep->fifo_size =
+				    roundup_pow_of_two(_ep->maxpacket_limit);
+			else
+				ep->fifo_size =
+				    roundup_pow_of_two(le16_to_cpu(desc->wMaxPacketSize));
+			ep->nr_banks = 1;
+			break;
+		}
+
+		/* It might be a little bit late to set this */
+		usb_ep_set_maxpacket_limit(&ep->ep, ep->fifo_size);
+
+		/* Generate ept_cfg basd on FIFO size and number of banks */
+		if (ep->fifo_size  <= 8)
+			ep->ept_cfg = USBA_BF(EPT_SIZE, USBA_EPT_SIZE_8);
+		else
+			/* LSB is bit 1, not 0 */
+			ep->ept_cfg =
+				USBA_BF(EPT_SIZE, fls(ep->fifo_size - 1) - 3);
+
+		ep->ept_cfg |= USBA_BF(BK_NUMBER, ep->nr_banks);
+
+		ep->udc->configured_ep++;
+	}
+
+return _ep;
+}
+
 static const struct usb_gadget_ops usba_udc_ops = {
 	.get_frame		= usba_udc_get_frame,
 	.wakeup			= usba_udc_wakeup,
 	.set_selfpowered	= usba_udc_set_selfpowered,
 	.udc_start		= atmel_usba_start,
 	.udc_stop		= atmel_usba_stop,
+	.match_ep		= atmel_usba_match_ep,
 };
 
 static struct usb_endpoint_descriptor usba_ep0_desc = {
@@ -1678,7 +1817,8 @@ static irqreturn_t usba_udc_irq(int irq, void *devid)
 	}
 
 	if (status & USBA_END_OF_RESET) {
-		struct usba_ep *ep0;
+		struct usba_ep *ep0, *ep;
+		int i, n;
 
 		usba_writel(udc, INT_CLR, USBA_END_OF_RESET);
 		generate_bias_pulse(udc);
@@ -1717,6 +1857,16 @@ static irqreturn_t usba_udc_irq(int irq, void *devid)
 		if (!(usba_ep_readl(ep0, CFG) & USBA_EPT_MAPPED))
 			dev_dbg(&udc->pdev->dev,
 				 "ODD: EP0 configuration is invalid!\n");
+
+		/* Preallocate other endpoints */
+		n = fifo_mode ? udc->num_ep : udc->configured_ep;
+		for (i = 1; i < n; i++) {
+			ep = &udc->usba_ep[i];
+			usba_ep_writel(ep, CFG, ep->ept_cfg);
+			if (!(usba_ep_readl(ep, CFG) & USBA_EPT_MAPPED))
+				dev_dbg(&udc->pdev->dev,
+				 "ODD: EP%d configuration is invalid!\n", i);
+		}
 	}
 
 	spin_unlock(&udc->lock);
@@ -1864,6 +2014,9 @@ static int atmel_usba_stop(struct usb_gadget *gadget)
 	if (gpio_is_valid(udc->vbus_pin))
 		disable_irq(gpio_to_irq(udc->vbus_pin));
 
+	if (fifo_mode == 0)
+		udc->configured_ep = 1;
+
 	usba_stop(udc);
 
 	udc->driver = NULL;
@@ -1931,9 +2084,13 @@ static struct usba_ep * atmel_udc_of_init(struct platform_device *pdev,
 						&flags);
 	udc->vbus_pin_inverted = (flags & OF_GPIO_ACTIVE_LOW) ? 1 : 0;
 
-	pp = NULL;
-	while ((pp = of_get_next_child(np, pp)))
-		udc->num_ep++;
+	if (fifo_mode == 0) {
+		pp = NULL;
+		while ((pp = of_get_next_child(np, pp)))
+			udc->num_ep++;
+		udc->configured_ep = 1;
+	} else
+		udc->num_ep = usba_config_fifo_table(udc);
 
 	eps = devm_kzalloc(&pdev->dev, sizeof(struct usba_ep) * udc->num_ep,
 			   GFP_KERNEL);
@@ -1946,7 +2103,7 @@ static struct usba_ep * atmel_udc_of_init(struct platform_device *pdev,
 
 	pp = NULL;
 	i = 0;
-	while ((pp = of_get_next_child(np, pp))) {
+	while ((pp = of_get_next_child(np, pp)) && i < udc->num_ep) {
 		ep = &eps[i];
 
 		ret = of_property_read_u32(pp, "reg", &val);
@@ -1954,21 +2111,21 @@ static struct usba_ep * atmel_udc_of_init(struct platform_device *pdev,
 			dev_err(&pdev->dev, "of_probe: reg error(%d)\n", ret);
 			goto err;
 		}
-		ep->index = val;
+		ep->index = fifo_mode ? udc->fifo_cfg[i].hw_ep_num : val;
 
 		ret = of_property_read_u32(pp, "atmel,fifo-size", &val);
 		if (ret) {
 			dev_err(&pdev->dev, "of_probe: fifo-size error(%d)\n", ret);
 			goto err;
 		}
-		ep->fifo_size = val;
+		ep->fifo_size = fifo_mode ? udc->fifo_cfg[i].fifo_size : val;
 
 		ret = of_property_read_u32(pp, "atmel,nb-banks", &val);
 		if (ret) {
 			dev_err(&pdev->dev, "of_probe: nb-banks error(%d)\n", ret);
 			goto err;
 		}
-		ep->nr_banks = val;
+		ep->nr_banks = fifo_mode ? udc->fifo_cfg[i].nr_banks : val;
 
 		ep->can_dma = of_property_read_bool(pp, "atmel,can-dma");
 		ep->can_isoc = of_property_read_bool(pp, "atmel,can-isoc");
@@ -2000,6 +2157,21 @@ static struct usba_ep * atmel_udc_of_init(struct platform_device *pdev,
 		ep->ep.caps.dir_in = true;
 		ep->ep.caps.dir_out = true;
 
+		if (fifo_mode != 0) {
+			/*
+			 * Generate ept_cfg based on FIFO size and
+			 * banks number
+			 */
+			if (ep->fifo_size  <= 8)
+				ep->ept_cfg = USBA_BF(EPT_SIZE, USBA_EPT_SIZE_8);
+			else
+				/* LSB is bit 1, not 0 */
+				ep->ept_cfg =
+				  USBA_BF(EPT_SIZE, fls(ep->fifo_size - 1) - 3);
+
+			ep->ept_cfg |= USBA_BF(BK_NUMBER, ep->nr_banks);
+		}
+
 		if (i)
 			list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list);
 
diff --git a/drivers/usb/gadget/udc/atmel_usba_udc.h b/drivers/usb/gadget/udc/atmel_usba_udc.h
index b03b2ebfc53a..9551b704bfd3 100644
--- a/drivers/usb/gadget/udc/atmel_usba_udc.h
+++ b/drivers/usb/gadget/udc/atmel_usba_udc.h
@@ -275,6 +275,12 @@ struct usba_dma_desc {
 	u32 ctrl;
 };
 
+struct usba_fifo_cfg {
+	u8			hw_ep_num;
+	u16			fifo_size;
+	u8			nr_banks;
+};
+
 struct usba_ep {
 	int					state;
 	void __iomem				*ep_regs;
@@ -293,7 +299,7 @@ struct usba_ep {
 	unsigned int				can_isoc:1;
 	unsigned int				is_isoc:1;
 	unsigned int				is_in:1;
-
+	unsigned long				ept_cfg;
 #ifdef CONFIG_USB_GADGET_DEBUG_FS
 	u32					last_dma_status;
 	struct dentry				*debugfs_dir;
@@ -338,6 +344,8 @@ struct usba_udc {
 	int vbus_pin;
 	int vbus_pin_inverted;
 	int num_ep;
+	int configured_ep;
+	struct usba_fifo_cfg *fifo_cfg;
 	struct clk *pclk;
 	struct clk *hclk;
 	struct usba_ep *usba_ep;
diff --git a/drivers/usb/gadget/udc/core.c b/drivers/usb/gadget/udc/core.c
index 0402177f93cd..d685d82dcf48 100644
--- a/drivers/usb/gadget/udc/core.c
+++ b/drivers/usb/gadget/udc/core.c
@@ -1080,6 +1080,24 @@ static void usb_udc_nop_release(struct device *dev)
 	dev_vdbg(dev, "%s\n", __func__);
 }
 
+/* should be called with udc_lock held */
+static int check_pending_gadget_drivers(struct usb_udc *udc)
+{
+	struct usb_gadget_driver *driver;
+	int ret = 0;
+
+	list_for_each_entry(driver, &gadget_driver_pending_list, pending)
+		if (!driver->udc_name || strcmp(driver->udc_name,
+						dev_name(&udc->dev)) == 0) {
+			ret = udc_bind_to_driver(udc, driver);
+			if (ret != -EPROBE_DEFER)
+				list_del(&driver->pending);
+			break;
+		}
+
+	return ret;
+}
+
 /**
  * usb_add_gadget_udc_release - adds a new gadget to the udc class driver list
  * @parent: the parent device to this udc. Usually the controller driver's
@@ -1093,7 +1111,6 @@ int usb_add_gadget_udc_release(struct device *parent, struct usb_gadget *gadget,
 		void (*release)(struct device *dev))
 {
 	struct usb_udc		*udc;
-	struct usb_gadget_driver *driver;
 	int			ret = -ENOMEM;
 
 	udc = kzalloc(sizeof(*udc), GFP_KERNEL);
@@ -1136,17 +1153,9 @@ int usb_add_gadget_udc_release(struct device *parent, struct usb_gadget *gadget,
 	udc->vbus = true;
 
 	/* pick up one of pending gadget drivers */
-	list_for_each_entry(driver, &gadget_driver_pending_list, pending) {
-		if (!driver->udc_name || strcmp(driver->udc_name,
-						dev_name(&udc->dev)) == 0) {
-			ret = udc_bind_to_driver(udc, driver);
-			if (ret != -EPROBE_DEFER)
-				list_del(&driver->pending);
-			if (ret)
-				goto err5;
-			break;
-		}
-	}
+	ret = check_pending_gadget_drivers(udc);
+	if (ret)
+		goto err5;
 
 	mutex_unlock(&udc_lock);
 
@@ -1356,14 +1365,22 @@ int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
 		return -EINVAL;
 
 	mutex_lock(&udc_lock);
-	list_for_each_entry(udc, &udc_list, list)
+	list_for_each_entry(udc, &udc_list, list) {
 		if (udc->driver == driver) {
 			usb_gadget_remove_driver(udc);
 			usb_gadget_set_state(udc->gadget,
-					USB_STATE_NOTATTACHED);
+					     USB_STATE_NOTATTACHED);
+
+			/* Maybe there is someone waiting for this UDC? */
+			check_pending_gadget_drivers(udc);
+			/*
+			 * For now we ignore bind errors as probably it's
+			 * not a valid reason to fail other's gadget unbind
+			 */
 			ret = 0;
 			break;
 		}
+	}
 
 	if (ret) {
 		list_del(&driver->pending);
diff --git a/drivers/usb/gadget/udc/fotg210-udc.c b/drivers/usb/gadget/udc/fotg210-udc.c
index 6ba122cc7490..78d0204e3e20 100644
--- a/drivers/usb/gadget/udc/fotg210-udc.c
+++ b/drivers/usb/gadget/udc/fotg210-udc.c
@@ -527,7 +527,7 @@ static void fotg210_ep_fifo_flush(struct usb_ep *_ep)
 {
 }
 
-static struct usb_ep_ops fotg210_ep_ops = {
+static const struct usb_ep_ops fotg210_ep_ops = {
 	.enable		= fotg210_ep_enable,
 	.disable	= fotg210_ep_disable,
 
@@ -1058,7 +1058,7 @@ static int fotg210_udc_stop(struct usb_gadget *g)
 	return 0;
 }
 
-static struct usb_gadget_ops fotg210_gadget_ops = {
+static const struct usb_gadget_ops fotg210_gadget_ops = {
 	.udc_start		= fotg210_udc_start,
 	.udc_stop		= fotg210_udc_stop,
 };
diff --git a/drivers/usb/gadget/udc/fsl_qe_udc.c b/drivers/usb/gadget/udc/fsl_qe_udc.c
index 4fff51b8a18e..303328ce59ee 100644
--- a/drivers/usb/gadget/udc/fsl_qe_udc.c
+++ b/drivers/usb/gadget/udc/fsl_qe_udc.c
@@ -1847,7 +1847,7 @@ out:
 	return status;
 }
 
-static struct usb_ep_ops qe_ep_ops = {
+static const struct usb_ep_ops qe_ep_ops = {
 	.enable = qe_ep_enable,
 	.disable = qe_ep_disable,
 
diff --git a/drivers/usb/gadget/udc/fsl_udc_core.c b/drivers/usb/gadget/udc/fsl_udc_core.c
index 71094e479a96..2e41ef36b944 100644
--- a/drivers/usb/gadget/udc/fsl_udc_core.c
+++ b/drivers/usb/gadget/udc/fsl_udc_core.c
@@ -1118,7 +1118,7 @@ static void fsl_ep_fifo_flush(struct usb_ep *_ep)
 	} while (fsl_readl(&dr_regs->endptstatus) & bits);
 }
 
-static struct usb_ep_ops fsl_ep_ops = {
+static const struct usb_ep_ops fsl_ep_ops = {
 	.enable = fsl_ep_enable,
 	.disable = fsl_ep_disable,
 
@@ -1248,6 +1248,12 @@ static const struct usb_gadget_ops fsl_gadget_ops = {
 	.udc_stop = fsl_udc_stop,
 };
 
+/*
+ * Empty complete function used by this driver to fill in the req->complete
+ * field when creating a request since the complete field is mandatory.
+ */
+static void fsl_noop_complete(struct usb_ep *ep, struct usb_request *req) { }
+
 /* Set protocol stall on ep0, protocol stall will automatically be cleared
    on new transaction */
 static void ep0stall(struct fsl_udc *udc)
@@ -1282,7 +1288,7 @@ static int ep0_prime_status(struct fsl_udc *udc, int direction)
 	req->req.length = 0;
 	req->req.status = -EINPROGRESS;
 	req->req.actual = 0;
-	req->req.complete = NULL;
+	req->req.complete = fsl_noop_complete;
 	req->dtd_count = 0;
 
 	ret = usb_gadget_map_request(&ep->udc->gadget, &req->req, ep_is_in(ep));
@@ -1365,7 +1371,7 @@ static void ch9getstatus(struct fsl_udc *udc, u8 request_type, u16 value,
 	req->req.length = 2;
 	req->req.status = -EINPROGRESS;
 	req->req.actual = 0;
-	req->req.complete = NULL;
+	req->req.complete = fsl_noop_complete;
 	req->dtd_count = 0;
 
 	ret = usb_gadget_map_request(&ep->udc->gadget, &req->req, ep_is_in(ep));
diff --git a/drivers/usb/gadget/udc/fusb300_udc.c b/drivers/usb/gadget/udc/fusb300_udc.c
index 42ff308578df..e0c1b0099265 100644
--- a/drivers/usb/gadget/udc/fusb300_udc.c
+++ b/drivers/usb/gadget/udc/fusb300_udc.c
@@ -518,7 +518,7 @@ static void fusb300_fifo_flush(struct usb_ep *_ep)
 {
 }
 
-static struct usb_ep_ops fusb300_ep_ops = {
+static const struct usb_ep_ops fusb300_ep_ops = {
 	.enable		= fusb300_enable,
 	.disable	= fusb300_disable,
 
diff --git a/drivers/usb/gadget/udc/goku_udc.c b/drivers/usb/gadget/udc/goku_udc.c
index 5107987bd353..8433c22900dc 100644
--- a/drivers/usb/gadget/udc/goku_udc.c
+++ b/drivers/usb/gadget/udc/goku_udc.c
@@ -968,7 +968,7 @@ static void goku_fifo_flush(struct usb_ep *_ep)
 		command(regs, COMMAND_FIFO_CLEAR, ep->num);
 }
 
-static struct usb_ep_ops goku_ep_ops = {
+static const struct usb_ep_ops goku_ep_ops = {
 	.enable		= goku_ep_enable,
 	.disable	= goku_ep_disable,
 
diff --git a/drivers/usb/gadget/udc/gr_udc.c b/drivers/usb/gadget/udc/gr_udc.c
index b16f8af34050..1f9941145746 100644
--- a/drivers/usb/gadget/udc/gr_udc.c
+++ b/drivers/usb/gadget/udc/gr_udc.c
@@ -1841,7 +1841,7 @@ static void gr_fifo_flush(struct usb_ep *_ep)
 	spin_unlock(&ep->dev->lock);
 }
 
-static struct usb_ep_ops gr_ep_ops = {
+static const struct usb_ep_ops gr_ep_ops = {
 	.enable		= gr_ep_enable,
 	.disable	= gr_ep_disable,
 
diff --git a/drivers/usb/gadget/udc/m66592-udc.c b/drivers/usb/gadget/udc/m66592-udc.c
index de3e03483659..46ce7bc15f2b 100644
--- a/drivers/usb/gadget/udc/m66592-udc.c
+++ b/drivers/usb/gadget/udc/m66592-udc.c
@@ -1436,7 +1436,7 @@ static void m66592_fifo_flush(struct usb_ep *_ep)
 	spin_unlock_irqrestore(&ep->m66592->lock, flags);
 }
 
-static struct usb_ep_ops m66592_ep_ops = {
+static const struct usb_ep_ops m66592_ep_ops = {
 	.enable		= m66592_enable,
 	.disable	= m66592_disable,
 
diff --git a/drivers/usb/gadget/udc/mv_u3d_core.c b/drivers/usb/gadget/udc/mv_u3d_core.c
index 8d726bd767fd..d365449a295a 100644
--- a/drivers/usb/gadget/udc/mv_u3d_core.c
+++ b/drivers/usb/gadget/udc/mv_u3d_core.c
@@ -995,7 +995,7 @@ static int mv_u3d_ep_set_wedge(struct usb_ep *_ep)
 	return mv_u3d_ep_set_halt_wedge(_ep, 1, 1);
 }
 
-static struct usb_ep_ops mv_u3d_ep_ops = {
+static const struct usb_ep_ops mv_u3d_ep_ops = {
 	.enable		= mv_u3d_ep_enable,
 	.disable	= mv_u3d_ep_disable,
 
diff --git a/drivers/usb/gadget/udc/mv_udc_core.c b/drivers/usb/gadget/udc/mv_udc_core.c
index d82a91bddbd9..27ebb0d5449d 100644
--- a/drivers/usb/gadget/udc/mv_udc_core.c
+++ b/drivers/usb/gadget/udc/mv_udc_core.c
@@ -946,7 +946,7 @@ static int mv_ep_set_wedge(struct usb_ep *_ep)
 	return mv_ep_set_halt_wedge(_ep, 1, 1);
 }
 
-static struct usb_ep_ops mv_ep_ops = {
+static const struct usb_ep_ops mv_ep_ops = {
 	.enable		= mv_ep_enable,
 	.disable	= mv_ep_disable,
 
diff --git a/drivers/usb/gadget/udc/net2272.c b/drivers/usb/gadget/udc/net2272.c
index 078c91d546e0..7dc0102abdfe 100644
--- a/drivers/usb/gadget/udc/net2272.c
+++ b/drivers/usb/gadget/udc/net2272.c
@@ -181,7 +181,7 @@ static void net2272_dequeue_all(struct net2272_ep *);
 static int net2272_kick_dma(struct net2272_ep *, struct net2272_request *);
 static int net2272_fifo_status(struct usb_ep *);
 
-static struct usb_ep_ops net2272_ep_ops;
+static const struct usb_ep_ops net2272_ep_ops;
 
 /*---------------------------------------------------------------------------*/
 
@@ -1067,7 +1067,7 @@ net2272_fifo_flush(struct usb_ep *_ep)
 	net2272_ep_write(ep, EP_STAT1, 1 << BUFFER_FLUSH);
 }
 
-static struct usb_ep_ops net2272_ep_ops = {
+static const struct usb_ep_ops net2272_ep_ops = {
 	.enable        = net2272_enable,
 	.disable       = net2272_disable,
 
diff --git a/drivers/usb/gadget/udc/omap_udc.c b/drivers/usb/gadget/udc/omap_udc.c
index a8709f9e5648..f05ba6825bfe 100644
--- a/drivers/usb/gadget/udc/omap_udc.c
+++ b/drivers/usb/gadget/udc/omap_udc.c
@@ -1112,7 +1112,7 @@ done:
 	return status;
 }
 
-static struct usb_ep_ops omap_ep_ops = {
+static const struct usb_ep_ops omap_ep_ops = {
 	.enable		= omap_ep_enable,
 	.disable	= omap_ep_disable,
 
diff --git a/drivers/usb/gadget/udc/pxa27x_udc.c b/drivers/usb/gadget/udc/pxa27x_udc.c
index 7fa60f5b7ae4..e1335ad5bce9 100644
--- a/drivers/usb/gadget/udc/pxa27x_udc.c
+++ b/drivers/usb/gadget/udc/pxa27x_udc.c
@@ -1473,7 +1473,7 @@ static int pxa_ep_disable(struct usb_ep *_ep)
 	return 0;
 }
 
-static struct usb_ep_ops pxa_ep_ops = {
+static const struct usb_ep_ops pxa_ep_ops = {
 	.enable		= pxa_ep_enable,
 	.disable	= pxa_ep_disable,
 
diff --git a/drivers/usb/gadget/udc/r8a66597-udc.c b/drivers/usb/gadget/udc/r8a66597-udc.c
index f2c8862093a2..118ad70f1af0 100644
--- a/drivers/usb/gadget/udc/r8a66597-udc.c
+++ b/drivers/usb/gadget/udc/r8a66597-udc.c
@@ -1706,7 +1706,7 @@ static void r8a66597_fifo_flush(struct usb_ep *_ep)
 	spin_unlock_irqrestore(&ep->r8a66597->lock, flags);
 }
 
-static struct usb_ep_ops r8a66597_ep_ops = {
+static const struct usb_ep_ops r8a66597_ep_ops = {
 	.enable		= r8a66597_enable,
 	.disable	= r8a66597_disable,
 
diff --git a/drivers/usb/gadget/udc/s3c-hsudc.c b/drivers/usb/gadget/udc/s3c-hsudc.c
index 82a9e2a3bedc..42587b738a1f 100644
--- a/drivers/usb/gadget/udc/s3c-hsudc.c
+++ b/drivers/usb/gadget/udc/s3c-hsudc.c
@@ -954,7 +954,7 @@ static int s3c_hsudc_dequeue(struct usb_ep *_ep, struct usb_request *_req)
 	return 0;
 }
 
-static struct usb_ep_ops s3c_hsudc_ep_ops = {
+static const struct usb_ep_ops s3c_hsudc_ep_ops = {
 	.enable = s3c_hsudc_ep_enable,
 	.disable = s3c_hsudc_ep_disable,
 	.alloc_request = s3c_hsudc_alloc_request,
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 6361fc739306..407d947b34ea 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -45,9 +45,9 @@ config USB_XHCI_PLATFORM
 	  If unsure, say N.
 
 config USB_XHCI_MTK
-	tristate "xHCI support for Mediatek MT65xx"
+	tristate "xHCI support for Mediatek MT65xx/MT7621"
 	select MFD_SYSCON
-	depends on ARCH_MEDIATEK || COMPILE_TEST
+	depends on (MIPS && SOC_MT7621) || ARCH_MEDIATEK || COMPILE_TEST
 	---help---
 	  Say 'Y' to enable the support for the xHCI host controller
 	  found in Mediatek MT65xx SoCs.
diff --git a/drivers/usb/host/ehci-exynos.c b/drivers/usb/host/ehci-exynos.c
index 42e5b66353ef..7a603f66a9bc 100644
--- a/drivers/usb/host/ehci-exynos.c
+++ b/drivers/usb/host/ehci-exynos.c
@@ -77,10 +77,12 @@ static int exynos_ehci_get_phy(struct device *dev,
 		if (IS_ERR(phy)) {
 			ret = PTR_ERR(phy);
 			if (ret == -EPROBE_DEFER) {
+				of_node_put(child);
 				return ret;
 			} else if (ret != -ENOSYS && ret != -ENODEV) {
 				dev_err(dev,
 					"Error retrieving usb2 phy: %d\n", ret);
+				of_node_put(child);
 				return ret;
 			}
 		}
diff --git a/drivers/usb/host/ehci-fsl.c b/drivers/usb/host/ehci-fsl.c
index 91701cc68082..3733aab46efe 100644
--- a/drivers/usb/host/ehci-fsl.c
+++ b/drivers/usb/host/ehci-fsl.c
@@ -600,7 +600,7 @@ static int ehci_fsl_drv_restore(struct device *dev)
 	return 0;
 }
 
-static struct dev_pm_ops ehci_fsl_pm_ops = {
+static const struct dev_pm_ops ehci_fsl_pm_ops = {
 	.suspend = ehci_fsl_drv_suspend,
 	.resume = ehci_fsl_drv_resume,
 	.restore = ehci_fsl_drv_restore,
diff --git a/drivers/usb/host/ohci-exynos.c b/drivers/usb/host/ohci-exynos.c
index 2cd105be7319..6865b919403f 100644
--- a/drivers/usb/host/ohci-exynos.c
+++ b/drivers/usb/host/ohci-exynos.c
@@ -66,10 +66,12 @@ static int exynos_ohci_get_phy(struct device *dev,
 		if (IS_ERR(phy)) {
 			ret = PTR_ERR(phy);
 			if (ret == -EPROBE_DEFER) {
+				of_node_put(child);
 				return ret;
 			} else if (ret != -ENOSYS && ret != -ENODEV) {
 				dev_err(dev,
 					"Error retrieving usb2 phy: %d\n", ret);
+				of_node_put(child);
 				return ret;
 			}
 		}
diff --git a/drivers/usb/host/ohci-hub.c b/drivers/usb/host/ohci-hub.c
index ed678c17c4ea..248eb7702463 100644
--- a/drivers/usb/host/ohci-hub.c
+++ b/drivers/usb/host/ohci-hub.c
@@ -17,21 +17,21 @@
 	ohci_dbg (hc, \
 		"%s roothub.portstatus [%d] " \
 		"= 0x%08x%s%s%s%s%s%s%s%s%s%s%s%s\n", \
-		label, num, temp, \
-		(temp & RH_PS_PRSC) ? " PRSC" : "", \
-		(temp & RH_PS_OCIC) ? " OCIC" : "", \
-		(temp & RH_PS_PSSC) ? " PSSC" : "", \
-		(temp & RH_PS_PESC) ? " PESC" : "", \
-		(temp & RH_PS_CSC) ? " CSC" : "", \
+		label, num, value, \
+		(value & RH_PS_PRSC) ? " PRSC" : "", \
+		(value & RH_PS_OCIC) ? " OCIC" : "", \
+		(value & RH_PS_PSSC) ? " PSSC" : "", \
+		(value & RH_PS_PESC) ? " PESC" : "", \
+		(value & RH_PS_CSC) ? " CSC" : "", \
 		\
-		(temp & RH_PS_LSDA) ? " LSDA" : "", \
-		(temp & RH_PS_PPS) ? " PPS" : "", \
-		(temp & RH_PS_PRS) ? " PRS" : "", \
-		(temp & RH_PS_POCI) ? " POCI" : "", \
-		(temp & RH_PS_PSS) ? " PSS" : "", \
+		(value & RH_PS_LSDA) ? " LSDA" : "", \
+		(value & RH_PS_PPS) ? " PPS" : "", \
+		(value & RH_PS_PRS) ? " PRS" : "", \
+		(value & RH_PS_POCI) ? " POCI" : "", \
+		(value & RH_PS_PSS) ? " PSS" : "", \
 		\
-		(temp & RH_PS_PES) ? " PES" : "", \
-		(temp & RH_PS_CCS) ? " CCS" : "" \
+		(value & RH_PS_PES) ? " PES" : "", \
+		(value & RH_PS_CCS) ? " CCS" : "" \
 		);
 
 /*-------------------------------------------------------------------------*/
diff --git a/drivers/usb/host/ohci-omap.c b/drivers/usb/host/ohci-omap.c
index b08e385399b9..a4d814b7f380 100644
--- a/drivers/usb/host/ohci-omap.c
+++ b/drivers/usb/host/ohci-omap.c
@@ -227,8 +227,7 @@ static int ohci_omap_reset(struct usb_hcd *hcd)
 				return status;
 			}
 		} else {
-			dev_err(hcd->self.controller, "can't find phy\n");
-			return -ENODEV;
+			return -EPROBE_DEFER;
 		}
 		ohci->start_hnp = start_hnp;
 	}
diff --git a/drivers/usb/host/oxu210hp-hcd.c b/drivers/usb/host/oxu210hp-hcd.c
index 4e4d601af35c..bcf531c44c70 100644
--- a/drivers/usb/host/oxu210hp-hcd.c
+++ b/drivers/usb/host/oxu210hp-hcd.c
@@ -2288,9 +2288,7 @@ restart:
 
 		while (q.ptr != NULL) {
 			union ehci_shadow temp;
-			int live;
 
-			live = HC_IS_RUNNING(oxu_to_hcd(oxu)->state);
 			switch (type) {
 			case Q_TYPE_QH:
 				/* handle any completions */
diff --git a/drivers/usb/host/xhci-dbg.c b/drivers/usb/host/xhci-dbg.c
index 74c42f722678..363d125300ea 100644
--- a/drivers/usb/host/xhci-dbg.c
+++ b/drivers/usb/host/xhci-dbg.c
@@ -37,10 +37,8 @@ void xhci_dbg_regs(struct xhci_hcd *xhci)
 			&xhci->cap_regs->hc_capbase, temp);
 	xhci_dbg(xhci, "//   CAPLENGTH: 0x%x\n",
 			(unsigned int) HC_LENGTH(temp));
-#if 0
 	xhci_dbg(xhci, "//   HCIVERSION: 0x%x\n",
 			(unsigned int) HC_VERSION(temp));
-#endif
 
 	xhci_dbg(xhci, "// xHCI operational registers at %p:\n", xhci->op_regs);
 
@@ -177,7 +175,7 @@ static void xhci_print_ports(struct xhci_hcd *xhci)
 	ports = HCS_MAX_PORTS(xhci->hcs_params1);
 	addr = &xhci->op_regs->port_status_base;
 	for (i = 0; i < ports; i++) {
-		for (j = 0; j < NUM_PORT_REGS; ++j) {
+		for (j = 0; j < NUM_PORT_REGS; j++) {
 			xhci_dbg(xhci, "%p port %s reg = 0x%x\n",
 					addr, names[j],
 					(unsigned int) readl(addr));
@@ -240,7 +238,7 @@ void xhci_print_run_regs(struct xhci_hcd *xhci)
 	xhci_dbg(xhci, "  %p: Microframe index = 0x%x\n",
 			&xhci->run_regs->microframe_index,
 			(unsigned int) temp);
-	for (i = 0; i < 7; ++i) {
+	for (i = 0; i < 7; i++) {
 		temp = readl(&xhci->run_regs->rsvd[i]);
 		if (temp != XHCI_INIT_VALUE)
 			xhci_dbg(xhci, "  WARN: %p: Rsvd[%i] = 0x%x\n",
@@ -259,7 +257,7 @@ void xhci_print_registers(struct xhci_hcd *xhci)
 void xhci_print_trb_offsets(struct xhci_hcd *xhci, union xhci_trb *trb)
 {
 	int i;
-	for (i = 0; i < 4; ++i)
+	for (i = 0; i < 4; i++)
 		xhci_dbg(xhci, "Offset 0x%x = 0x%x\n",
 				i*4, trb->generic.field[i]);
 }
@@ -332,7 +330,7 @@ void xhci_debug_segment(struct xhci_hcd *xhci, struct xhci_segment *seg)
 	u64 addr = seg->dma;
 	union xhci_trb *trb = seg->trbs;
 
-	for (i = 0; i < TRBS_PER_SEGMENT; ++i) {
+	for (i = 0; i < TRBS_PER_SEGMENT; i++) {
 		trb = &seg->trbs[i];
 		xhci_dbg(xhci, "@%016llx %08x %08x %08x %08x\n", addr,
 			 lower_32_bits(le64_to_cpu(trb->link.segment_ptr)),
@@ -413,7 +411,7 @@ void xhci_dbg_erst(struct xhci_hcd *xhci, struct xhci_erst *erst)
 	int i;
 	struct xhci_erst_entry *entry;
 
-	for (i = 0; i < erst->num_entries; ++i) {
+	for (i = 0; i < erst->num_entries; i++) {
 		entry = &erst->entries[i];
 		xhci_dbg(xhci, "@%016llx %08x %08x %08x %08x\n",
 			 addr,
@@ -440,7 +438,7 @@ void xhci_dbg_cmd_ptrs(struct xhci_hcd *xhci)
 static void dbg_rsvd64(struct xhci_hcd *xhci, u64 *ctx, dma_addr_t dma)
 {
 	int i;
-	for (i = 0; i < 4; ++i) {
+	for (i = 0; i < 4; i++) {
 		xhci_dbg(xhci, "@%p (virt) @%08llx "
 			 "(dma) %#08llx - rsvd64[%d]\n",
 			 &ctx[4 + i], (unsigned long long)dma,
@@ -496,7 +494,7 @@ static void xhci_dbg_slot_ctx(struct xhci_hcd *xhci, struct xhci_container_ctx *
 			&slot_ctx->dev_state,
 			(unsigned long long)dma, slot_ctx->dev_state);
 	dma += field_size;
-	for (i = 0; i < 4; ++i) {
+	for (i = 0; i < 4; i++) {
 		xhci_dbg(xhci, "@%p (virt) @%08llx (dma) %#08x - rsvd[%d]\n",
 				&slot_ctx->reserved[i], (unsigned long long)dma,
 				slot_ctx->reserved[i], i);
@@ -519,7 +517,7 @@ static void xhci_dbg_ep_ctx(struct xhci_hcd *xhci,
 
 	if (last_ep < 31)
 		last_ep_ctx = last_ep + 1;
-	for (i = 0; i < last_ep_ctx; ++i) {
+	for (i = 0; i < last_ep_ctx; i++) {
 		unsigned int epaddr = xhci_get_endpoint_address(i);
 		struct xhci_ep_ctx *ep_ctx = xhci_get_ep_ctx(xhci, ctx, i);
 		dma_addr_t dma = ctx->dma +
@@ -544,7 +542,7 @@ static void xhci_dbg_ep_ctx(struct xhci_hcd *xhci,
 				&ep_ctx->tx_info,
 				(unsigned long long)dma, ep_ctx->tx_info);
 		dma += field_size;
-		for (j = 0; j < 3; ++j) {
+		for (j = 0; j < 3; j++) {
 			xhci_dbg(xhci, "@%p (virt) @%08llx (dma) %#08x - rsvd[%d]\n",
 					&ep_ctx->reserved[j],
 					(unsigned long long)dma,
@@ -583,7 +581,7 @@ void xhci_dbg_ctx(struct xhci_hcd *xhci,
 			 &ctrl_ctx->add_flags, (unsigned long long)dma,
 			 ctrl_ctx->add_flags);
 		dma += field_size;
-		for (i = 0; i < 6; ++i) {
+		for (i = 0; i < 6; i++) {
 			xhci_dbg(xhci, "@%p (virt) @%08llx (dma) %#08x - rsvd2[%d]\n",
 				 &ctrl_ctx->rsvd2[i], (unsigned long long)dma,
 				 ctrl_ctx->rsvd2[i], i);
diff --git a/drivers/usb/host/xhci-ext-caps.h b/drivers/usb/host/xhci-ext-caps.h
index e0244fb3903d..28deea584884 100644
--- a/drivers/usb/host/xhci-ext-caps.h
+++ b/drivers/usb/host/xhci-ext-caps.h
@@ -117,7 +117,7 @@ static inline int xhci_find_next_ext_cap(void __iomem *base, u32 start, int id)
 		offset = XHCI_HCC_EXT_CAPS(val) << 2;
 		if (!offset)
 			return 0;
-	};
+	}
 	do {
 		val = readl(base + offset);
 		if (val == ~0)
diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c
index 0ef16900efed..3bddeaa1e2d7 100644
--- a/drivers/usb/host/xhci-hub.c
+++ b/drivers/usb/host/xhci-hub.c
@@ -389,6 +389,8 @@ static int xhci_stop_device(struct xhci_hcd *xhci, int slot_id, int suspend)
 	if (!virt_dev)
 		return -ENODEV;
 
+	trace_xhci_stop_device(virt_dev);
+
 	cmd = xhci_alloc_command(xhci, false, true, GFP_NOIO);
 	if (!cmd) {
 		xhci_dbg(xhci, "Couldn't allocate command structure.\n");
@@ -418,7 +420,8 @@ static int xhci_stop_device(struct xhci_hcd *xhci, int slot_id, int suspend)
 	/* Wait for last stop endpoint command to finish */
 	wait_for_completion(cmd->completion);
 
-	if (cmd->status == COMP_CMD_ABORT || cmd->status == COMP_CMD_STOP) {
+	if (cmd->status == COMP_COMMAND_ABORTED ||
+			cmd->status == COMP_STOPPED) {
 		xhci_warn(xhci, "Timeout while waiting for stop endpoint command\n");
 		ret = -ETIME;
 	}
@@ -458,6 +461,12 @@ static void xhci_disable_port(struct usb_hcd *hcd, struct xhci_hcd *xhci,
 		return;
 	}
 
+	if (xhci->quirks & XHCI_BROKEN_PORT_PED) {
+		xhci_dbg(xhci,
+			 "Broken Port Enabled/Disabled, ignoring port disable request.\n");
+		return;
+	}
+
 	/* Write 1 to disable the port */
 	writel(port_status | PORT_PE, addr);
 	port_status = readl(addr);
@@ -990,8 +999,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
 			temp = readl(port_array[wIndex]);
 			if ((temp & PORT_PE) == 0 || (temp & PORT_RESET)
 				|| (temp & PORT_PLS_MASK) >= XDEV_U3) {
-				xhci_warn(xhci, "USB core suspending device "
-					  "not in U0/U1/U2.\n");
+				xhci_warn(xhci, "USB core suspending device not in U0/U1/U2.\n");
 				goto error;
 			}
 
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c
index 8414ed2a02de..ba1853f4e407 100644
--- a/drivers/usb/host/xhci-mem.c
+++ b/drivers/usb/host/xhci-mem.c
@@ -936,6 +936,9 @@ void xhci_free_virt_device(struct xhci_hcd *xhci, int slot_id)
 		return;
 
 	dev = xhci->devs[slot_id];
+
+	trace_xhci_free_virt_device(dev);
+
 	xhci->dcbaa->dev_context_ptrs[slot_id] = 0;
 	if (!dev)
 		return;
@@ -943,7 +946,7 @@ void xhci_free_virt_device(struct xhci_hcd *xhci, int slot_id)
 	if (dev->tt_info)
 		old_active_eps = dev->tt_info->active_eps;
 
-	for (i = 0; i < 31; ++i) {
+	for (i = 0; i < 31; i++) {
 		if (dev->eps[i].ring)
 			xhci_ring_free(xhci, dev->eps[i].ring);
 		if (dev->eps[i].stream_info)
@@ -1075,6 +1078,8 @@ int xhci_alloc_virt_device(struct xhci_hcd *xhci, int slot_id,
 		 &xhci->dcbaa->dev_context_ptrs[slot_id],
 		 le64_to_cpu(xhci->dcbaa->dev_context_ptrs[slot_id]));
 
+	trace_xhci_alloc_virt_device(dev);
+
 	return 1;
 fail:
 	xhci_free_virt_device(xhci, slot_id);
@@ -1249,6 +1254,8 @@ int xhci_setup_addressable_virt_dev(struct xhci_hcd *xhci, struct usb_device *ud
 	ep0_ctx->deq = cpu_to_le64(dev->eps[0].ring->first_seg->dma |
 				   dev->eps[0].ring->cycle_state);
 
+	trace_xhci_setup_addressable_virt_device(dev);
+
 	/* Steps 7 and 8 were done in xhci_alloc_virt_device() */
 
 	return 0;
@@ -1414,14 +1421,16 @@ static u32 xhci_get_endpoint_type(struct usb_host_endpoint *ep)
 
 	in = usb_endpoint_dir_in(&ep->desc);
 
-	if (usb_endpoint_xfer_control(&ep->desc))
+	switch (usb_endpoint_type(&ep->desc)) {
+	case USB_ENDPOINT_XFER_CONTROL:
 		return CTRL_EP;
-	if (usb_endpoint_xfer_bulk(&ep->desc))
+	case USB_ENDPOINT_XFER_BULK:
 		return in ? BULK_IN_EP : BULK_OUT_EP;
-	if (usb_endpoint_xfer_isoc(&ep->desc))
+	case USB_ENDPOINT_XFER_ISOC:
 		return in ? ISOC_IN_EP : ISOC_OUT_EP;
-	if (usb_endpoint_xfer_int(&ep->desc))
+	case USB_ENDPOINT_XFER_INT:
 		return in ? INT_IN_EP : INT_OUT_EP;
+	}
 	return 0;
 }
 
@@ -1587,7 +1596,7 @@ void xhci_update_bw_info(struct xhci_hcd *xhci,
 	unsigned int ep_type;
 	int i;
 
-	for (i = 1; i < 31; ++i) {
+	for (i = 1; i < 31; i++) {
 		bw_info = &virt_dev->eps[i].bw_info;
 
 		/* We can't tell what endpoint type is being dropped, but
@@ -1808,10 +1817,7 @@ struct xhci_command *xhci_alloc_command(struct xhci_hcd *xhci,
 
 void xhci_urb_free_priv(struct urb_priv *urb_priv)
 {
-	if (urb_priv) {
-		kfree(urb_priv->td[0]);
-		kfree(urb_priv);
-	}
+	kfree(urb_priv);
 }
 
 void xhci_free_command(struct xhci_hcd *xhci,
@@ -2569,9 +2575,9 @@ int xhci_mem_init(struct xhci_hcd *xhci, gfp_t flags)
 	 * something other than the default (~1ms minimum between interrupts).
 	 * See section 5.5.1.2.
 	 */
-	for (i = 0; i < MAX_HC_SLOTS; ++i)
+	for (i = 0; i < MAX_HC_SLOTS; i++)
 		xhci->devs[i] = NULL;
-	for (i = 0; i < USB_MAXCHILDREN; ++i) {
+	for (i = 0; i < USB_MAXCHILDREN; i++) {
 		xhci->bus_state[0].resume_done[i] = 0;
 		xhci->bus_state[1].resume_done[i] = 0;
 		/* Only the USB 2.0 completions will ever be used. */
diff --git a/drivers/usb/host/xhci-mtk.c b/drivers/usb/host/xhci-mtk.c
index bac961cd24ad..9066ec9e0c2e 100644
--- a/drivers/usb/host/xhci-mtk.c
+++ b/drivers/usb/host/xhci-mtk.c
@@ -212,6 +212,12 @@ static int xhci_mtk_clks_enable(struct xhci_hcd_mtk *mtk)
 {
 	int ret;
 
+	ret = clk_prepare_enable(mtk->ref_clk);
+	if (ret) {
+		dev_err(mtk->dev, "failed to enable ref_clk\n");
+		goto ref_clk_err;
+	}
+
 	ret = clk_prepare_enable(mtk->sys_clk);
 	if (ret) {
 		dev_err(mtk->dev, "failed to enable sys_clk\n");
@@ -238,6 +244,8 @@ usb_p1_err:
 usb_p0_err:
 	clk_disable_unprepare(mtk->sys_clk);
 sys_clk_err:
+	clk_disable_unprepare(mtk->ref_clk);
+ref_clk_err:
 	return -EINVAL;
 }
 
@@ -248,6 +256,7 @@ static void xhci_mtk_clks_disable(struct xhci_hcd_mtk *mtk)
 		clk_disable_unprepare(mtk->wk_deb_p0);
 	}
 	clk_disable_unprepare(mtk->sys_clk);
+	clk_disable_unprepare(mtk->ref_clk);
 }
 
 /* only clocks can be turn off for ip-sleep wakeup mode */
@@ -550,6 +559,19 @@ static int xhci_mtk_probe(struct platform_device *pdev)
 		return PTR_ERR(mtk->sys_clk);
 	}
 
+	/*
+	 * reference clock is usually a "fixed-clock", make it optional
+	 * for backward compatibility and ignore the error if it does
+	 * not exist.
+	 */
+	mtk->ref_clk = devm_clk_get(dev, "ref_ck");
+	if (IS_ERR(mtk->ref_clk)) {
+		if (PTR_ERR(mtk->ref_clk) == -EPROBE_DEFER)
+			return -EPROBE_DEFER;
+
+		mtk->ref_clk = NULL;
+	}
+
 	mtk->lpm_support = of_property_read_bool(node, "usb3-lpm-capable");
 
 	ret = usb_wakeup_of_property_parse(mtk, node);
diff --git a/drivers/usb/host/xhci-mtk.h b/drivers/usb/host/xhci-mtk.h
index 2845c49efe1b..3aa5e1d25064 100644
--- a/drivers/usb/host/xhci-mtk.h
+++ b/drivers/usb/host/xhci-mtk.h
@@ -124,6 +124,7 @@ struct xhci_hcd_mtk {
 	struct regulator *vusb33;
 	struct regulator *vbus;
 	struct clk *sys_clk;	/* sys and mac clock */
+	struct clk *ref_clk;
 	struct clk *wk_deb_p0;	/* port0's wakeup debounce clock */
 	struct clk *wk_deb_p1;
 	struct regmap *pericfg;
diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
index 954abfd5014d..fc99f51d12e1 100644
--- a/drivers/usb/host/xhci-pci.c
+++ b/drivers/usb/host/xhci-pci.c
@@ -242,11 +242,7 @@ static int xhci_pci_setup(struct usb_hcd *hcd)
 	xhci_dbg(xhci, "Got SBRN %u\n", (unsigned int) xhci->sbrn);
 
 	/* Find any debug ports */
-	retval = xhci_pci_reinit(xhci, pdev);
-	if (!retval)
-		return retval;
-
-	return retval;
+	return xhci_pci_reinit(xhci, pdev);
 }
 
 /*
diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index e5834dd9bcde..6d33b42ffcf5 100644
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -232,8 +232,8 @@ static int xhci_plat_probe(struct platform_device *pdev)
 	if (device_property_read_bool(&pdev->dev, "usb3-lpm-capable"))
 		xhci->quirks |= XHCI_LPM_SUPPORT;
 
-	if (HCC_MAX_PSA(xhci->hcc_params) >= 4)
-		xhci->shared_hcd->can_do_streams = 1;
+	if (device_property_read_bool(&pdev->dev, "quirk-broken-port-ped"))
+		xhci->quirks |= XHCI_BROKEN_PORT_PED;
 
 	hcd->usb_phy = devm_usb_get_phy_by_phandle(&pdev->dev, "usb-phy", 0);
 	if (IS_ERR(hcd->usb_phy)) {
@@ -251,6 +251,9 @@ static int xhci_plat_probe(struct platform_device *pdev)
 	if (ret)
 		goto disable_usb_phy;
 
+	if (HCC_MAX_PSA(xhci->hcc_params) >= 4)
+		xhci->shared_hcd->can_do_streams = 1;
+
 	ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED);
 	if (ret)
 		goto dealloc_usb2_hcd;
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index e32029a31ca4..d9936c771fa0 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -119,14 +119,29 @@ static bool last_td_in_urb(struct xhci_td *td)
 {
 	struct urb_priv *urb_priv = td->urb->hcpriv;
 
-	return urb_priv->td_cnt == urb_priv->length;
+	return urb_priv->num_tds_done == urb_priv->num_tds;
 }
 
 static void inc_td_cnt(struct urb *urb)
 {
 	struct urb_priv *urb_priv = urb->hcpriv;
 
-	urb_priv->td_cnt++;
+	urb_priv->num_tds_done++;
+}
+
+static void trb_to_noop(union xhci_trb *trb, u32 noop_type)
+{
+	if (trb_is_link(trb)) {
+		/* unchain chained link TRBs */
+		trb->link.control &= cpu_to_le32(~TRB_CHAIN);
+	} else {
+		trb->generic.field[0] = 0;
+		trb->generic.field[1] = 0;
+		trb->generic.field[2] = 0;
+		/* Preserve only the cycle bit of this TRB */
+		trb->generic.field[3] &= cpu_to_le32(TRB_CYCLE);
+		trb->generic.field[3] |= cpu_to_le32(TRB_TYPE(noop_type));
+	}
 }
 
 /* Updates trb to point to the next TRB in the ring, and updates seg if the next
@@ -299,27 +314,19 @@ static void xhci_handle_stopped_cmd_ring(struct xhci_hcd *xhci,
 					 struct xhci_command *cur_cmd)
 {
 	struct xhci_command *i_cmd;
-	u32 cycle_state;
 
 	/* Turn all aborted commands in list to no-ops, then restart */
 	list_for_each_entry(i_cmd, &xhci->cmd_list, cmd_list) {
 
-		if (i_cmd->status != COMP_CMD_ABORT)
+		if (i_cmd->status != COMP_COMMAND_ABORTED)
 			continue;
 
-		i_cmd->status = COMP_CMD_STOP;
+		i_cmd->status = COMP_STOPPED;
 
 		xhci_dbg(xhci, "Turn aborted command %p to no-op\n",
 			 i_cmd->command_trb);
-		/* get cycle state from the original cmd trb */
-		cycle_state = le32_to_cpu(
-			i_cmd->command_trb->generic.field[3]) &	TRB_CYCLE;
-		/* modify the command trb to no-op command */
-		i_cmd->command_trb->generic.field[0] = 0;
-		i_cmd->command_trb->generic.field[1] = 0;
-		i_cmd->command_trb->generic.field[2] = 0;
-		i_cmd->command_trb->generic.field[3] = cpu_to_le32(
-			TRB_TYPE(TRB_CMD_NOOP) | cycle_state);
+
+		trb_to_noop(i_cmd->command_trb, TRB_CMD_NOOP);
 
 		/*
 		 * caller waiting for completion is called when command
@@ -362,19 +369,11 @@ static int xhci_abort_cmd_ring(struct xhci_hcd *xhci, unsigned long flags)
 	ret = xhci_handshake(&xhci->op_regs->cmd_ring,
 			CMD_RING_RUNNING, 0, 5 * 1000 * 1000);
 	if (ret < 0) {
-		/* we are about to kill xhci, give it one more chance */
-		xhci_write_64(xhci, temp_64 | CMD_RING_ABORT,
-			      &xhci->op_regs->cmd_ring);
-		udelay(1000);
-		ret = xhci_handshake(&xhci->op_regs->cmd_ring,
-				     CMD_RING_RUNNING, 0, 3 * 1000 * 1000);
-		if (ret < 0) {
-			xhci_err(xhci, "Stopped the command ring failed, "
-				 "maybe the host is dead\n");
-			xhci->xhc_state |= XHCI_STATE_DYING;
-			xhci_halt(xhci);
-			return -ESHUTDOWN;
-		}
+		xhci_err(xhci,
+			 "Stop command ring failed, maybe the host is dead\n");
+		xhci->xhc_state |= XHCI_STATE_DYING;
+		xhci_halt(xhci);
+		return -ESHUTDOWN;
 	}
 	/*
 	 * Writing the CMD_RING_ABORT bit should cause a cmd completion event,
@@ -410,7 +409,7 @@ void xhci_ring_ep_doorbell(struct xhci_hcd *xhci,
 	 * pointer command pending because the device can choose to start any
 	 * stream once the endpoint is on the HW schedule.
 	 */
-	if ((ep_state & EP_HALT_PENDING) || (ep_state & SET_DEQ_PENDING) ||
+	if ((ep_state & EP_STOP_CMD_PENDING) || (ep_state & SET_DEQ_PENDING) ||
 	    (ep_state & EP_HALTED))
 		return;
 	writel(DB_VALUE(ep_index, stream_id), db_addr);
@@ -600,18 +599,8 @@ static void td_to_noop(struct xhci_hcd *xhci, struct xhci_ring *ep_ring,
 	union xhci_trb *trb		= td->first_trb;
 
 	while (1) {
-		if (trb_is_link(trb)) {
-			/* unchain chained link TRBs */
-			trb->link.control &= cpu_to_le32(~TRB_CHAIN);
-		} else {
-			trb->generic.field[0] = 0;
-			trb->generic.field[1] = 0;
-			trb->generic.field[2] = 0;
-			/* Preserve only the cycle bit of this TRB */
-			trb->generic.field[3] &= cpu_to_le32(TRB_CYCLE);
-			trb->generic.field[3] |= cpu_to_le32(
-				TRB_TYPE(TRB_TR_NOOP));
-		}
+		trb_to_noop(trb, TRB_TR_NOOP);
+
 		/* flip cycle if asked to */
 		if (flip_cycle && trb != td->first_trb && trb != td->last_trb)
 			trb->generic.field[3] ^= cpu_to_le32(TRB_CYCLE);
@@ -626,13 +615,9 @@ static void td_to_noop(struct xhci_hcd *xhci, struct xhci_ring *ep_ring,
 static void xhci_stop_watchdog_timer_in_irq(struct xhci_hcd *xhci,
 		struct xhci_virt_ep *ep)
 {
-	ep->ep_state &= ~EP_HALT_PENDING;
-	/* Can't del_timer_sync in interrupt, so we attempt to cancel.  If the
-	 * timer is running on another CPU, we don't decrement stop_cmds_pending
-	 * (since we didn't successfully stop the watchdog timer).
-	 */
-	if (del_timer(&ep->stop_cmd_timer))
-		ep->stop_cmds_pending--;
+	ep->ep_state &= ~EP_STOP_CMD_PENDING;
+	/* Can't del_timer_sync in interrupt */
+	del_timer(&ep->stop_cmd_timer);
 }
 
 /*
@@ -657,6 +642,7 @@ static void xhci_giveback_urb_in_irq(struct xhci_hcd *xhci,
 	usb_hcd_unlink_urb_from_ep(hcd, urb);
 	spin_unlock(&xhci->lock);
 	usb_hcd_giveback_urb(hcd, urb, status);
+	trace_xhci_urb_giveback(urb);
 	spin_lock(&xhci->lock);
 }
 
@@ -667,7 +653,7 @@ static void xhci_unmap_td_bounce_buffer(struct xhci_hcd *xhci,
 	struct xhci_segment *seg = td->bounce_seg;
 	struct urb *urb = td->urb;
 
-	if (!seg || !urb)
+	if (!ring || !seg || !urb)
 		return;
 
 	if (usb_urb_dir_out(urb)) {
@@ -701,7 +687,6 @@ static void xhci_handle_cmd_stop_ep(struct xhci_hcd *xhci, int slot_id,
 	unsigned int ep_index;
 	struct xhci_ring *ep_ring;
 	struct xhci_virt_ep *ep;
-	struct list_head *entry;
 	struct xhci_td *cur_td = NULL;
 	struct xhci_td *last_unlinked_td;
 
@@ -718,6 +703,8 @@ static void xhci_handle_cmd_stop_ep(struct xhci_hcd *xhci, int slot_id,
 	memset(&deq_state, 0, sizeof(deq_state));
 	ep_index = TRB_TO_EP_INDEX(le32_to_cpu(trb->generic.field[3]));
 	ep = &xhci->devs[slot_id]->eps[ep_index];
+	last_unlinked_td = list_last_entry(&ep->cancelled_td_list,
+			struct xhci_td, cancelled_td_list);
 
 	if (list_empty(&ep->cancelled_td_list)) {
 		xhci_stop_watchdog_timer_in_irq(xhci, ep);
@@ -731,8 +718,7 @@ static void xhci_handle_cmd_stop_ep(struct xhci_hcd *xhci, int slot_id,
 	 * it.  We're also in the event handler, so we can't get re-interrupted
 	 * if another Stop Endpoint command completes
 	 */
-	list_for_each(entry, &ep->cancelled_td_list) {
-		cur_td = list_entry(entry, struct xhci_td, cancelled_td_list);
+	list_for_each_entry(cur_td, &ep->cancelled_td_list, cancelled_td_list) {
 		xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb,
 				"Removing canceled TD starting at 0x%llx (dma).",
 				(unsigned long long)xhci_trb_virt_to_dma(
@@ -774,7 +760,7 @@ remove_finished_td:
 		 */
 		list_del_init(&cur_td->td_list);
 	}
-	last_unlinked_td = cur_td;
+
 	xhci_stop_watchdog_timer_in_irq(xhci, ep);
 
 	/* If necessary, queue a Set Transfer Ring Dequeue Pointer command */
@@ -796,7 +782,7 @@ remove_finished_td:
 	 * So stop when we've completed the URB for the last TD we unlinked.
 	 */
 	do {
-		cur_td = list_entry(ep->cancelled_td_list.next,
+		cur_td = list_first_entry(&ep->cancelled_td_list,
 				struct xhci_td, cancelled_td_list);
 		list_del_init(&cur_td->cancelled_td_list);
 
@@ -805,8 +791,7 @@ remove_finished_td:
 		 * just overwrite it (because the URB has been unlinked).
 		 */
 		ep_ring = xhci_urb_to_transfer_ring(xhci, cur_td->urb);
-		if (ep_ring && cur_td->bounce_seg)
-			xhci_unmap_td_bounce_buffer(xhci, ep_ring, cur_td);
+		xhci_unmap_td_bounce_buffer(xhci, ep_ring, cur_td);
 		inc_td_cnt(cur_td->urb);
 		if (last_td_in_urb(cur_td))
 			xhci_giveback_urb_in_irq(xhci, cur_td, 0);
@@ -824,16 +809,15 @@ remove_finished_td:
 static void xhci_kill_ring_urbs(struct xhci_hcd *xhci, struct xhci_ring *ring)
 {
 	struct xhci_td *cur_td;
+	struct xhci_td *tmp;
 
-	while (!list_empty(&ring->td_list)) {
-		cur_td = list_first_entry(&ring->td_list,
-				struct xhci_td, td_list);
+	list_for_each_entry_safe(cur_td, tmp, &ring->td_list, td_list) {
 		list_del_init(&cur_td->td_list);
+
 		if (!list_empty(&cur_td->cancelled_td_list))
 			list_del_init(&cur_td->cancelled_td_list);
 
-		if (cur_td->bounce_seg)
-			xhci_unmap_td_bounce_buffer(xhci, ring, cur_td);
+		xhci_unmap_td_bounce_buffer(xhci, ring, cur_td);
 
 		inc_td_cnt(cur_td->urb);
 		if (last_td_in_urb(cur_td))
@@ -845,6 +829,7 @@ static void xhci_kill_endpoint_urbs(struct xhci_hcd *xhci,
 		int slot_id, int ep_index)
 {
 	struct xhci_td *cur_td;
+	struct xhci_td *tmp;
 	struct xhci_virt_ep *ep;
 	struct xhci_ring *ring;
 
@@ -870,12 +855,12 @@ static void xhci_kill_endpoint_urbs(struct xhci_hcd *xhci,
 				slot_id, ep_index);
 		xhci_kill_ring_urbs(xhci, ring);
 	}
-	while (!list_empty(&ep->cancelled_td_list)) {
-		cur_td = list_first_entry(&ep->cancelled_td_list,
-				struct xhci_td, cancelled_td_list);
-		list_del_init(&cur_td->cancelled_td_list);
 
+	list_for_each_entry_safe(cur_td, tmp, &ep->cancelled_td_list,
+			cancelled_td_list) {
+		list_del_init(&cur_td->cancelled_td_list);
 		inc_td_cnt(cur_td->urb);
+
 		if (last_td_in_urb(cur_td))
 			xhci_giveback_urb_in_irq(xhci, cur_td, -ESHUTDOWN);
 	}
@@ -895,10 +880,8 @@ static void xhci_kill_endpoint_urbs(struct xhci_hcd *xhci,
  * simple flag to say whether there is a pending stop endpoint command for a
  * particular endpoint.
  *
- * Instead we use a combination of that flag and a counter for the number of
- * pending stop endpoint commands.  If the timer is the tail end of the last
- * stop endpoint command, and the endpoint's command is still pending, we assume
- * the host is dying.
+ * Instead we use a combination of that flag and checking if a new timer is
+ * pending.
  */
 void xhci_stop_endpoint_command_watchdog(unsigned long arg)
 {
@@ -912,12 +895,11 @@ void xhci_stop_endpoint_command_watchdog(unsigned long arg)
 
 	spin_lock_irqsave(&xhci->lock, flags);
 
-	ep->stop_cmds_pending--;
-	if (!(ep->stop_cmds_pending == 0 && (ep->ep_state & EP_HALT_PENDING))) {
-		xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb,
-				"Stop EP timer ran, but no command pending, "
-				"exiting.");
+	/* bail out if cmd completed but raced with stop ep watchdog timer.*/
+	if (!(ep->ep_state & EP_STOP_CMD_PENDING) ||
+	    timer_pending(&ep->stop_cmd_timer)) {
 		spin_unlock_irqrestore(&xhci->lock, flags);
+		xhci_dbg(xhci, "Stop EP timer raced with cmd completion, exit");
 		return;
 	}
 
@@ -926,7 +908,10 @@ void xhci_stop_endpoint_command_watchdog(unsigned long arg)
 	/* Oops, HC is dead or dying or at least not responding to the stop
 	 * endpoint command.
 	 */
+
 	xhci->xhc_state |= XHCI_STATE_DYING;
+	ep->ep_state &= ~EP_STOP_CMD_PENDING;
+
 	/* Disable interrupts from the host controller and start halting it */
 	xhci_quiesce(xhci);
 	spin_unlock_irqrestore(&xhci->lock, flags);
@@ -1050,10 +1035,10 @@ static void xhci_handle_cmd_set_deq(struct xhci_hcd *xhci, int slot_id,
 		unsigned int slot_state;
 
 		switch (cmd_comp_code) {
-		case COMP_TRB_ERR:
+		case COMP_TRB_ERROR:
 			xhci_warn(xhci, "WARN Set TR Deq Ptr cmd invalid because of stream ID configuration\n");
 			break;
-		case COMP_CTX_STATE:
+		case COMP_CONTEXT_STATE_ERROR:
 			xhci_warn(xhci, "WARN Set TR Deq Ptr cmd failed due to incorrect slot or ep state.\n");
 			ep_state = GET_EP_CTX_STATE(ep_ctx);
 			slot_state = le32_to_cpu(slot_ctx->dev_state);
@@ -1062,7 +1047,7 @@ static void xhci_handle_cmd_set_deq(struct xhci_hcd *xhci, int slot_id,
 					"Slot state = %u, EP state = %u",
 					slot_state, ep_state);
 			break;
-		case COMP_EBADSLT:
+		case COMP_SLOT_NOT_ENABLED_ERROR:
 			xhci_warn(xhci, "WARN Set TR Deq Ptr cmd failed because slot %u was not enabled.\n",
 					slot_id);
 			break;
@@ -1259,7 +1244,7 @@ void xhci_cleanup_command_queue(struct xhci_hcd *xhci)
 {
 	struct xhci_command *cur_cmd, *tmp_cmd;
 	list_for_each_entry_safe(cur_cmd, tmp_cmd, &xhci->cmd_list, cmd_list)
-		xhci_complete_del_and_free_cmd(cur_cmd, COMP_CMD_ABORT);
+		xhci_complete_del_and_free_cmd(cur_cmd, COMP_COMMAND_ABORTED);
 }
 
 void xhci_handle_command_timeout(struct work_struct *work)
@@ -1282,7 +1267,7 @@ void xhci_handle_command_timeout(struct work_struct *work)
 		return;
 	}
 	/* mark this command to be cancelled */
-	xhci->current_cmd->status = COMP_CMD_ABORT;
+	xhci->current_cmd->status = COMP_COMMAND_ABORTED;
 
 	/* Make sure command ring is running before aborting it */
 	hw_ring_state = xhci_read_64(xhci, &xhci->op_regs->cmd_ring);
@@ -1335,6 +1320,9 @@ static void handle_cmd_completion(struct xhci_hcd *xhci,
 
 	cmd_dma = le64_to_cpu(event->cmd_trb);
 	cmd_trb = xhci->cmd_ring->dequeue;
+
+	trace_xhci_handle_command(xhci->cmd_ring, &cmd_trb->generic);
+
 	cmd_dequeue_dma = xhci_trb_virt_to_dma(xhci->cmd_ring->deq_seg,
 			cmd_trb);
 	/*
@@ -1347,16 +1335,14 @@ static void handle_cmd_completion(struct xhci_hcd *xhci,
 		return;
 	}
 
-	cmd = list_entry(xhci->cmd_list.next, struct xhci_command, cmd_list);
+	cmd = list_first_entry(&xhci->cmd_list, struct xhci_command, cmd_list);
 
 	cancel_delayed_work(&xhci->cmd_timer);
 
-	trace_xhci_cmd_completion(cmd_trb, (struct xhci_generic_trb *) event);
-
 	cmd_comp_code = GET_COMP_CODE(le32_to_cpu(event->status));
 
 	/* If CMD ring stopped we own the trbs between enqueue and dequeue */
-	if (cmd_comp_code == COMP_CMD_STOP) {
+	if (cmd_comp_code == COMP_STOPPED) {
 		complete_all(&xhci->cmd_ring_stop_completion);
 		return;
 	}
@@ -1373,9 +1359,9 @@ static void handle_cmd_completion(struct xhci_hcd *xhci,
 	 * The command ring is stopped now, but the xHC will issue a Command
 	 * Ring Stopped event which will cause us to restart it.
 	 */
-	if (cmd_comp_code == COMP_CMD_ABORT) {
+	if (cmd_comp_code == COMP_COMMAND_ABORTED) {
 		xhci->cmd_ring_state = CMD_RING_STATE_STOPPED;
-		if (cmd->status == COMP_CMD_ABORT) {
+		if (cmd->status == COMP_COMMAND_ABORTED) {
 			if (xhci->current_cmd == cmd)
 				xhci->current_cmd = NULL;
 			goto event_handled;
@@ -1411,8 +1397,8 @@ static void handle_cmd_completion(struct xhci_hcd *xhci,
 		break;
 	case TRB_CMD_NOOP:
 		/* Is this an aborted command turned to NO-OP? */
-		if (cmd->status == COMP_CMD_STOP)
-			cmd_comp_code = COMP_CMD_STOP;
+		if (cmd->status == COMP_STOPPED)
+			cmd_comp_code = COMP_STOPPED;
 		break;
 	case TRB_RESET_EP:
 		WARN_ON(slot_id != TRB_TO_SLOT_ID(
@@ -1437,9 +1423,9 @@ static void handle_cmd_completion(struct xhci_hcd *xhci,
 	}
 
 	/* restart timer if this wasn't the last command */
-	if (cmd->cmd_list.next != &xhci->cmd_list) {
-		xhci->current_cmd = list_entry(cmd->cmd_list.next,
-					       struct xhci_command, cmd_list);
+	if (!list_is_singular(&xhci->cmd_list)) {
+		xhci->current_cmd = list_first_entry(&cmd->cmd_list,
+						struct xhci_command, cmd_list);
 		xhci_mod_cmd_timer(xhci, XHCI_CMD_DEFAULT_TIMEOUT);
 	} else if (xhci->current_cmd == cmd) {
 		xhci->current_cmd = NULL;
@@ -1805,9 +1791,9 @@ static int xhci_requires_manual_halt_cleanup(struct xhci_hcd *xhci,
 		unsigned int trb_comp_code)
 {
 	/* TRB completion codes that may require a manual halt cleanup */
-	if (trb_comp_code == COMP_TX_ERR ||
-			trb_comp_code == COMP_BABBLE ||
-			trb_comp_code == COMP_SPLIT_ERR)
+	if (trb_comp_code == COMP_USB_TRANSACTION_ERROR ||
+			trb_comp_code == COMP_BABBLE_DETECTED_ERROR ||
+			trb_comp_code == COMP_SPLIT_TRANSACTION_ERROR)
 		/* The 0.95 spec says a babbling control endpoint
 		 * is not halted. The 0.96 spec says it is.  Some HW
 		 * claims to be 0.95 compliant, but it halts the control
@@ -1834,22 +1820,64 @@ int xhci_is_vendor_info_code(struct xhci_hcd *xhci, unsigned int trb_comp_code)
 	return 0;
 }
 
-/*
- * Finish the td processing, remove the td from td list;
- * Return 1 if the urb can be given back.
- */
+static int xhci_td_cleanup(struct xhci_hcd *xhci, struct xhci_td *td,
+		struct xhci_ring *ep_ring, int *status)
+{
+	struct urb_priv	*urb_priv;
+	struct urb *urb = NULL;
+
+	/* Clean up the endpoint's TD list */
+	urb = td->urb;
+	urb_priv = urb->hcpriv;
+
+	/* if a bounce buffer was used to align this td then unmap it */
+	xhci_unmap_td_bounce_buffer(xhci, ep_ring, td);
+
+	/* Do one last check of the actual transfer length.
+	 * If the host controller said we transferred more data than the buffer
+	 * length, urb->actual_length will be a very big number (since it's
+	 * unsigned).  Play it safe and say we didn't transfer anything.
+	 */
+	if (urb->actual_length > urb->transfer_buffer_length) {
+		xhci_warn(xhci, "URB req %u and actual %u transfer length mismatch\n",
+			  urb->transfer_buffer_length, urb->actual_length);
+		urb->actual_length = 0;
+		*status = 0;
+	}
+	list_del_init(&td->td_list);
+	/* Was this TD slated to be cancelled but completed anyway? */
+	if (!list_empty(&td->cancelled_td_list))
+		list_del_init(&td->cancelled_td_list);
+
+	inc_td_cnt(urb);
+	/* Giveback the urb when all the tds are completed */
+	if (last_td_in_urb(td)) {
+		if ((urb->actual_length != urb->transfer_buffer_length &&
+		     (urb->transfer_flags & URB_SHORT_NOT_OK)) ||
+		    (*status != 0 && !usb_endpoint_xfer_isoc(&urb->ep->desc)))
+			xhci_dbg(xhci, "Giveback URB %p, len = %d, expected = %d, status = %d\n",
+				 urb, urb->actual_length,
+				 urb->transfer_buffer_length, *status);
+
+		/* set isoc urb status to 0 just as EHCI, UHCI, and OHCI */
+		if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS)
+			*status = 0;
+		xhci_giveback_urb_in_irq(xhci, td, *status);
+	}
+
+	return 0;
+}
+
 static int finish_td(struct xhci_hcd *xhci, struct xhci_td *td,
 	union xhci_trb *ep_trb, struct xhci_transfer_event *event,
 	struct xhci_virt_ep *ep, int *status, bool skip)
 {
 	struct xhci_virt_device *xdev;
+	struct xhci_ep_ctx *ep_ctx;
 	struct xhci_ring *ep_ring;
 	unsigned int slot_id;
-	int ep_index;
-	struct urb *urb = NULL;
-	struct xhci_ep_ctx *ep_ctx;
-	struct urb_priv	*urb_priv;
 	u32 trb_comp_code;
+	int ep_index;
 
 	slot_id = TRB_TO_SLOT_ID(le32_to_cpu(event->flags));
 	xdev = xhci->devs[slot_id];
@@ -1861,9 +1889,9 @@ static int finish_td(struct xhci_hcd *xhci, struct xhci_td *td,
 	if (skip)
 		goto td_cleanup;
 
-	if (trb_comp_code == COMP_STOP_INVAL ||
-			trb_comp_code == COMP_STOP ||
-			trb_comp_code == COMP_STOP_SHORT) {
+	if (trb_comp_code == COMP_STOPPED_LENGTH_INVALID ||
+			trb_comp_code == COMP_STOPPED ||
+			trb_comp_code == COMP_STOPPED_SHORT_PACKET) {
 		/* The Endpoint Stop Command completion will take care of any
 		 * stopped TDs.  A stopped TD may be restarted, so don't update
 		 * the ring dequeue pointer or take this TD off any lists yet.
@@ -1871,7 +1899,7 @@ static int finish_td(struct xhci_hcd *xhci, struct xhci_td *td,
 		ep->stopped_td = td;
 		return 0;
 	}
-	if (trb_comp_code == COMP_STALL ||
+	if (trb_comp_code == COMP_STALL_ERROR ||
 		xhci_requires_manual_halt_cleanup(xhci, ep_ctx,
 						trb_comp_code)) {
 		/* Issue a reset endpoint command to clear the host side
@@ -1889,46 +1917,7 @@ static int finish_td(struct xhci_hcd *xhci, struct xhci_td *td,
 	}
 
 td_cleanup:
-	/* Clean up the endpoint's TD list */
-	urb = td->urb;
-	urb_priv = urb->hcpriv;
-
-	/* if a bounce buffer was used to align this td then unmap it */
-	if (td->bounce_seg)
-		xhci_unmap_td_bounce_buffer(xhci, ep_ring, td);
-
-	/* Do one last check of the actual transfer length.
-	 * If the host controller said we transferred more data than the buffer
-	 * length, urb->actual_length will be a very big number (since it's
-	 * unsigned).  Play it safe and say we didn't transfer anything.
-	 */
-	if (urb->actual_length > urb->transfer_buffer_length) {
-		xhci_warn(xhci, "URB req %u and actual %u transfer length mismatch\n",
-			  urb->transfer_buffer_length, urb->actual_length);
-		urb->actual_length = 0;
-		*status = 0;
-	}
-	list_del_init(&td->td_list);
-	/* Was this TD slated to be cancelled but completed anyway? */
-	if (!list_empty(&td->cancelled_td_list))
-		list_del_init(&td->cancelled_td_list);
-
-	inc_td_cnt(urb);
-	/* Giveback the urb when all the tds are completed */
-	if (last_td_in_urb(td)) {
-		if ((urb->actual_length != urb->transfer_buffer_length &&
-		     (urb->transfer_flags & URB_SHORT_NOT_OK)) ||
-		    (*status != 0 && !usb_endpoint_xfer_isoc(&urb->ep->desc)))
-			xhci_dbg(xhci, "Giveback URB %p, len = %d, expected = %d, status = %d\n",
-				 urb, urb->actual_length,
-				 urb->transfer_buffer_length, *status);
-
-		/* set isoc urb status to 0 just as EHCI, UHCI, and OHCI */
-		if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS)
-			*status = 0;
-		xhci_giveback_urb_in_irq(xhci, td, *status);
-	}
-	return 0;
+	return xhci_td_cleanup(xhci, td, ep_ring, status);
 }
 
 /* sum trb lengths from ring dequeue up to stop_trb, _excluding_ stop_trb */
@@ -1982,16 +1971,16 @@ static int process_ctrl_td(struct xhci_hcd *xhci, struct xhci_td *td,
 		}
 		*status = 0;
 		break;
-	case COMP_SHORT_TX:
+	case COMP_SHORT_PACKET:
 		*status = 0;
 		break;
-	case COMP_STOP_SHORT:
+	case COMP_STOPPED_SHORT_PACKET:
 		if (trb_type == TRB_DATA || trb_type == TRB_NORMAL)
 			td->urb->actual_length = remaining;
 		else
 			xhci_warn(xhci, "WARN: Stopped Short Packet on ctrl setup or status TRB\n");
 		goto finish_td;
-	case COMP_STOP:
+	case COMP_STOPPED:
 		switch (trb_type) {
 		case TRB_SETUP:
 			td->urb->actual_length = 0;
@@ -2005,7 +1994,7 @@ static int process_ctrl_td(struct xhci_hcd *xhci, struct xhci_td *td,
 				  trb_type);
 			goto finish_td;
 		}
-	case COMP_STOP_INVAL:
+	case COMP_STOPPED_LENGTH_INVALID:
 		goto finish_td;
 	default:
 		if (!xhci_requires_manual_halt_cleanup(xhci,
@@ -2014,7 +2003,7 @@ static int process_ctrl_td(struct xhci_hcd *xhci, struct xhci_td *td,
 		xhci_dbg(xhci, "TRB error %u, halted endpoint index = %u\n",
 			 trb_comp_code, ep_index);
 		/* else fall through */
-	case COMP_STALL:
+	case COMP_STALL_ERROR:
 		/* Did we transfer part of the data (middle) phase? */
 		if (trb_type == TRB_DATA || trb_type == TRB_NORMAL)
 			td->urb->actual_length = requested - remaining;
@@ -2066,7 +2055,7 @@ static int process_isoc_td(struct xhci_hcd *xhci, struct xhci_td *td,
 	ep_ring = xhci_dma_to_transfer_ring(ep, le64_to_cpu(event->buffer));
 	trb_comp_code = GET_COMP_CODE(le32_to_cpu(event->transfer_len));
 	urb_priv = td->urb->hcpriv;
-	idx = urb_priv->td_cnt;
+	idx = urb_priv->num_tds_done;
 	frame = &td->urb->iso_frame_desc[idx];
 	requested = frame->length;
 	remaining = EVENT_TRB_LEN(le32_to_cpu(event->transfer_len));
@@ -2085,35 +2074,35 @@ static int process_isoc_td(struct xhci_hcd *xhci, struct xhci_td *td,
 		}
 		frame->status = 0;
 		break;
-	case COMP_SHORT_TX:
+	case COMP_SHORT_PACKET:
 		frame->status = short_framestatus;
 		sum_trbs_for_length = true;
 		break;
-	case COMP_BW_OVER:
+	case COMP_BANDWIDTH_OVERRUN_ERROR:
 		frame->status = -ECOMM;
 		break;
-	case COMP_BUFF_OVER:
-	case COMP_BABBLE:
+	case COMP_ISOCH_BUFFER_OVERRUN:
+	case COMP_BABBLE_DETECTED_ERROR:
 		frame->status = -EOVERFLOW;
 		break;
-	case COMP_DEV_ERR:
-	case COMP_STALL:
+	case COMP_INCOMPATIBLE_DEVICE_ERROR:
+	case COMP_STALL_ERROR:
 		frame->status = -EPROTO;
 		break;
-	case COMP_TX_ERR:
+	case COMP_USB_TRANSACTION_ERROR:
 		frame->status = -EPROTO;
 		if (ep_trb != td->last_trb)
 			return 0;
 		break;
-	case COMP_STOP:
+	case COMP_STOPPED:
 		sum_trbs_for_length = true;
 		break;
-	case COMP_STOP_SHORT:
+	case COMP_STOPPED_SHORT_PACKET:
 		/* field normally containing residue now contains tranferred */
 		frame->status = short_framestatus;
 		requested = remaining;
 		break;
-	case COMP_STOP_INVAL:
+	case COMP_STOPPED_LENGTH_INVALID:
 		requested = 0;
 		remaining = 0;
 		break;
@@ -2145,7 +2134,7 @@ static int skip_isoc_td(struct xhci_hcd *xhci, struct xhci_td *td,
 
 	ep_ring = xhci_dma_to_transfer_ring(ep, le64_to_cpu(event->buffer));
 	urb_priv = td->urb->hcpriv;
-	idx = urb_priv->td_cnt;
+	idx = urb_priv->num_tds_done;
 	frame = &td->urb->iso_frame_desc[idx];
 
 	/* The transfer is partly done. */
@@ -2190,16 +2179,16 @@ static int process_bulk_intr_td(struct xhci_hcd *xhci, struct xhci_td *td,
 		}
 		*status = 0;
 		break;
-	case COMP_SHORT_TX:
+	case COMP_SHORT_PACKET:
 		xhci_dbg(xhci, "ep %#x - asked for %d bytes, %d bytes untransferred\n",
 			 td->urb->ep->desc.bEndpointAddress,
 			 requested, remaining);
 		*status = 0;
 		break;
-	case COMP_STOP_SHORT:
+	case COMP_STOPPED_SHORT_PACKET:
 		td->urb->actual_length = remaining;
 		goto finish_td;
-	case COMP_STOP_INVAL:
+	case COMP_STOPPED_LENGTH_INVALID:
 		/* stopped on ep trb with invalid length, exclude it */
 		ep_trb_len	= 0;
 		remaining	= 0;
@@ -2231,8 +2220,6 @@ finish_td:
  */
 static int handle_tx_event(struct xhci_hcd *xhci,
 		struct xhci_transfer_event *event)
-	__releases(&xhci->lock)
-	__acquires(&xhci->lock)
 {
 	struct xhci_virt_device *xdev;
 	struct xhci_virt_ep *ep;
@@ -2305,50 +2292,50 @@ static int handle_tx_event(struct xhci_hcd *xhci,
 		if (EVENT_TRB_LEN(le32_to_cpu(event->transfer_len)) == 0)
 			break;
 		if (xhci->quirks & XHCI_TRUST_TX_LENGTH)
-			trb_comp_code = COMP_SHORT_TX;
+			trb_comp_code = COMP_SHORT_PACKET;
 		else
 			xhci_warn_ratelimited(xhci,
 					"WARN Successful completion on short TX: needs XHCI_TRUST_TX_LENGTH quirk?\n");
-	case COMP_SHORT_TX:
+	case COMP_SHORT_PACKET:
 		break;
-	case COMP_STOP:
+	case COMP_STOPPED:
 		xhci_dbg(xhci, "Stopped on Transfer TRB\n");
 		break;
-	case COMP_STOP_INVAL:
+	case COMP_STOPPED_LENGTH_INVALID:
 		xhci_dbg(xhci, "Stopped on No-op or Link TRB\n");
 		break;
-	case COMP_STOP_SHORT:
+	case COMP_STOPPED_SHORT_PACKET:
 		xhci_dbg(xhci, "Stopped with short packet transfer detected\n");
 		break;
-	case COMP_STALL:
+	case COMP_STALL_ERROR:
 		xhci_dbg(xhci, "Stalled endpoint\n");
 		ep->ep_state |= EP_HALTED;
 		status = -EPIPE;
 		break;
-	case COMP_TRB_ERR:
+	case COMP_TRB_ERROR:
 		xhci_warn(xhci, "WARN: TRB error on endpoint\n");
 		status = -EILSEQ;
 		break;
-	case COMP_SPLIT_ERR:
-	case COMP_TX_ERR:
+	case COMP_SPLIT_TRANSACTION_ERROR:
+	case COMP_USB_TRANSACTION_ERROR:
 		xhci_dbg(xhci, "Transfer error on endpoint\n");
 		status = -EPROTO;
 		break;
-	case COMP_BABBLE:
+	case COMP_BABBLE_DETECTED_ERROR:
 		xhci_dbg(xhci, "Babble error on endpoint\n");
 		status = -EOVERFLOW;
 		break;
-	case COMP_DB_ERR:
+	case COMP_DATA_BUFFER_ERROR:
 		xhci_warn(xhci, "WARN: HC couldn't access mem fast enough\n");
 		status = -ENOSR;
 		break;
-	case COMP_BW_OVER:
+	case COMP_BANDWIDTH_OVERRUN_ERROR:
 		xhci_warn(xhci, "WARN: bandwidth overrun event on endpoint\n");
 		break;
-	case COMP_BUFF_OVER:
+	case COMP_ISOCH_BUFFER_OVERRUN:
 		xhci_warn(xhci, "WARN: buffer overrun event on endpoint\n");
 		break;
-	case COMP_UNDERRUN:
+	case COMP_RING_UNDERRUN:
 		/*
 		 * When the Isoch ring is empty, the xHC will generate
 		 * a Ring Overrun Event for IN Isoch endpoint or Ring
@@ -2361,7 +2348,7 @@ static int handle_tx_event(struct xhci_hcd *xhci,
 				 TRB_TO_SLOT_ID(le32_to_cpu(event->flags)),
 				 ep_index);
 		goto cleanup;
-	case COMP_OVERRUN:
+	case COMP_RING_OVERRUN:
 		xhci_dbg(xhci, "overrun event on endpoint\n");
 		if (!list_empty(&ep_ring->td_list))
 			xhci_dbg(xhci, "Overrun Event for slot %d ep %d "
@@ -2369,11 +2356,11 @@ static int handle_tx_event(struct xhci_hcd *xhci,
 				 TRB_TO_SLOT_ID(le32_to_cpu(event->flags)),
 				 ep_index);
 		goto cleanup;
-	case COMP_DEV_ERR:
+	case COMP_INCOMPATIBLE_DEVICE_ERROR:
 		xhci_warn(xhci, "WARN: detect an incompatible device");
 		status = -EPROTO;
 		break;
-	case COMP_MISSED_INT:
+	case COMP_MISSED_SERVICE_ERROR:
 		/*
 		 * When encounter missed service error, one or more isoc tds
 		 * may be missed by xHC.
@@ -2383,7 +2370,7 @@ static int handle_tx_event(struct xhci_hcd *xhci,
 		ep->skip = true;
 		xhci_dbg(xhci, "Miss service interval error, set skip flag\n");
 		goto cleanup;
-	case COMP_PING_ERR:
+	case COMP_NO_PING_RESPONSE_ERROR:
 		ep->skip = true;
 		xhci_dbg(xhci, "No Ping response error, Skip one Isoc TD\n");
 		goto cleanup;
@@ -2407,8 +2394,8 @@ static int handle_tx_event(struct xhci_hcd *xhci,
 			 * event if the device was suspended.  Don't print
 			 * warnings.
 			 */
-			if (!(trb_comp_code == COMP_STOP ||
-						trb_comp_code == COMP_STOP_INVAL)) {
+			if (!(trb_comp_code == COMP_STOPPED ||
+				trb_comp_code == COMP_STOPPED_LENGTH_INVALID)) {
 				xhci_warn(xhci, "WARN Event TRB for slot %d ep %d with no TDs queued?\n",
 						TRB_TO_SLOT_ID(le32_to_cpu(event->flags)),
 						ep_index);
@@ -2433,7 +2420,8 @@ static int handle_tx_event(struct xhci_hcd *xhci,
 			goto cleanup;
 		}
 
-		td = list_entry(ep_ring->td_list.next, struct xhci_td, td_list);
+		td = list_first_entry(&ep_ring->td_list, struct xhci_td,
+				      td_list);
 		if (ep->skip)
 			td_num--;
 
@@ -2449,8 +2437,8 @@ static int handle_tx_event(struct xhci_hcd *xhci,
 		 * last TRB of the previous TD. The command completion handle
 		 * will take care the rest.
 		 */
-		if (!ep_seg && (trb_comp_code == COMP_STOP ||
-				   trb_comp_code == COMP_STOP_INVAL)) {
+		if (!ep_seg && (trb_comp_code == COMP_STOPPED ||
+			   trb_comp_code == COMP_STOPPED_LENGTH_INVALID)) {
 			goto cleanup;
 		}
 
@@ -2481,7 +2469,7 @@ static int handle_tx_event(struct xhci_hcd *xhci,
 			skip_isoc_td(xhci, td, event, ep, &status);
 			goto cleanup;
 		}
-		if (trb_comp_code == COMP_SHORT_TX)
+		if (trb_comp_code == COMP_SHORT_PACKET)
 			ep_ring->last_td_was_short = true;
 		else
 			ep_ring->last_td_was_short = false;
@@ -2493,6 +2481,10 @@ static int handle_tx_event(struct xhci_hcd *xhci,
 
 		ep_trb = &ep_seg->trbs[(ep_trb_dma - ep_seg->dma) /
 						sizeof(*ep_trb)];
+
+		trace_xhci_handle_transfer(ep_ring,
+				(struct xhci_generic_trb *) ep_trb);
+
 		/*
 		 * No-op TRB should not trigger interrupts.
 		 * If ep_trb is a no-op TRB, it means the
@@ -2514,8 +2506,8 @@ static int handle_tx_event(struct xhci_hcd *xhci,
 					     &status);
 cleanup:
 		handling_skipped_tds = ep->skip &&
-			trb_comp_code != COMP_MISSED_INT &&
-			trb_comp_code != COMP_PING_ERR;
+			trb_comp_code != COMP_MISSED_SERVICE_ERROR &&
+			trb_comp_code != COMP_NO_PING_RESPONSE_ERROR;
 
 		/*
 		 * Do not update event ring dequeue pointer if we're in a loop
@@ -2559,6 +2551,8 @@ static int xhci_handle_event(struct xhci_hcd *xhci)
 	    xhci->event_ring->cycle_state)
 		return 0;
 
+	trace_xhci_handle_event(xhci->event_ring, &event->generic);
+
 	/*
 	 * Barrier between reading the TRB_CYCLE (valid) flag above and any
 	 * speculative reads of the event's flags/data below.
@@ -2617,27 +2611,28 @@ static int xhci_handle_event(struct xhci_hcd *xhci)
 irqreturn_t xhci_irq(struct usb_hcd *hcd)
 {
 	struct xhci_hcd *xhci = hcd_to_xhci(hcd);
-	u32 status;
-	u64 temp_64;
 	union xhci_trb *event_ring_deq;
+	irqreturn_t ret = IRQ_NONE;
 	dma_addr_t deq;
+	u64 temp_64;
+	u32 status;
 
 	spin_lock(&xhci->lock);
 	/* Check if the xHC generated the interrupt, or the irq is shared */
 	status = readl(&xhci->op_regs->status);
-	if (status == 0xffffffff)
-		goto hw_died;
-
-	if (!(status & STS_EINT)) {
-		spin_unlock(&xhci->lock);
-		return IRQ_NONE;
+	if (status == 0xffffffff) {
+		ret = IRQ_HANDLED;
+		goto out;
 	}
+
+	if (!(status & STS_EINT))
+		goto out;
+
 	if (status & STS_FATAL) {
 		xhci_warn(xhci, "WARNING: Host System Error\n");
 		xhci_halt(xhci);
-hw_died:
-		spin_unlock(&xhci->lock);
-		return IRQ_HANDLED;
+		ret = IRQ_HANDLED;
+		goto out;
 	}
 
 	/*
@@ -2668,9 +2663,8 @@ hw_died:
 		temp_64 = xhci_read_64(xhci, &xhci->ir_set->erst_dequeue);
 		xhci_write_64(xhci, temp_64 | ERST_EHB,
 				&xhci->ir_set->erst_dequeue);
-		spin_unlock(&xhci->lock);
-
-		return IRQ_HANDLED;
+		ret = IRQ_HANDLED;
+		goto out;
 	}
 
 	event_ring_deq = xhci->event_ring->dequeue;
@@ -2695,10 +2689,12 @@ hw_died:
 	/* Clear the event handler busy flag (RW1C); event ring is empty. */
 	temp_64 |= ERST_EHB;
 	xhci_write_64(xhci, temp_64, &xhci->ir_set->erst_dequeue);
+	ret = IRQ_HANDLED;
 
+out:
 	spin_unlock(&xhci->lock);
 
-	return IRQ_HANDLED;
+	return ret;
 }
 
 irqreturn_t xhci_msi_irq(int irq, void *hcd)
@@ -2726,6 +2722,9 @@ static void queue_trb(struct xhci_hcd *xhci, struct xhci_ring *ring,
 	trb->field[1] = cpu_to_le32(field2);
 	trb->field[2] = cpu_to_le32(field3);
 	trb->field[3] = cpu_to_le32(field4);
+
+	trace_xhci_queue_trb(ring, trb);
+
 	inc_enq(xhci, ring, more_trbs_coming);
 }
 
@@ -2839,7 +2838,7 @@ static int prepare_transfer(struct xhci_hcd *xhci,
 		return ret;
 
 	urb_priv = urb->hcpriv;
-	td = urb_priv->td[td_index];
+	td = &urb_priv->td[td_index];
 
 	INIT_LIST_HEAD(&td->td_list);
 	INIT_LIST_HEAD(&td->cancelled_td_list);
@@ -2856,8 +2855,6 @@ static int prepare_transfer(struct xhci_hcd *xhci,
 	td->start_seg = ep_ring->enq_seg;
 	td->first_trb = ep_ring->enqueue;
 
-	urb_priv->td[td_index] = td;
-
 	return 0;
 }
 
@@ -3134,10 +3131,10 @@ int xhci_queue_bulk_tx(struct xhci_hcd *xhci, gfp_t mem_flags,
 	urb_priv = urb->hcpriv;
 
 	/* Deal with URB_ZERO_PACKET - need one more td/trb */
-	if (urb->transfer_flags & URB_ZERO_PACKET && urb_priv->length > 1)
+	if (urb->transfer_flags & URB_ZERO_PACKET && urb_priv->num_tds > 1)
 		need_zero_pkt = true;
 
-	td = urb_priv->td[0];
+	td = &urb_priv->td[0];
 
 	/*
 	 * Don't give the first TRB to the hardware (by toggling the cycle bit)
@@ -3230,7 +3227,7 @@ int xhci_queue_bulk_tx(struct xhci_hcd *xhci, gfp_t mem_flags,
 		ret = prepare_transfer(xhci, xhci->devs[slot_id],
 				       ep_index, urb->stream_id,
 				       1, urb, 1, mem_flags);
-		urb_priv->td[1]->last_trb = ring->enqueue;
+		urb_priv->td[1].last_trb = ring->enqueue;
 		field = TRB_TYPE(TRB_NORMAL) | ring->cycle_state | TRB_IOC;
 		queue_trb(xhci, ring, 0, 0, 0, TRB_INTR_TARGET(0), field);
 	}
@@ -3251,7 +3248,7 @@ int xhci_queue_ctrl_tx(struct xhci_hcd *xhci, gfp_t mem_flags,
 	struct usb_ctrlrequest *setup;
 	struct xhci_generic_trb *start_trb;
 	int start_cycle;
-	u32 field, length_field, remainder;
+	u32 field;
 	struct urb_priv *urb_priv;
 	struct xhci_td *td;
 
@@ -3282,7 +3279,7 @@ int xhci_queue_ctrl_tx(struct xhci_hcd *xhci, gfp_t mem_flags,
 		return ret;
 
 	urb_priv = urb->hcpriv;
-	td = urb_priv->td[0];
+	td = &urb_priv->td[0];
 
 	/*
 	 * Don't give the first TRB to the hardware (by toggling the cycle bit)
@@ -3324,16 +3321,16 @@ int xhci_queue_ctrl_tx(struct xhci_hcd *xhci, gfp_t mem_flags,
 	else
 		field = TRB_TYPE(TRB_DATA);
 
-	remainder = xhci_td_remainder(xhci, 0,
-				   urb->transfer_buffer_length,
-				   urb->transfer_buffer_length,
-				   urb, 1);
-
-	length_field = TRB_LEN(urb->transfer_buffer_length) |
-		TRB_TD_SIZE(remainder) |
-		TRB_INTR_TARGET(0);
-
 	if (urb->transfer_buffer_length > 0) {
+		u32 length_field, remainder;
+
+		remainder = xhci_td_remainder(xhci, 0,
+				urb->transfer_buffer_length,
+				urb->transfer_buffer_length,
+				urb, 1);
+		length_field = TRB_LEN(urb->transfer_buffer_length) |
+				TRB_TD_SIZE(remainder) |
+				TRB_INTR_TARGET(0);
 		if (setup->bRequestType & USB_DIR_IN)
 			field |= TRB_DIR_IN;
 		queue_trb(xhci, ep_ring, true,
@@ -3570,7 +3567,7 @@ static int xhci_queue_isoc_tx(struct xhci_hcd *xhci, gfp_t mem_flags,
 				return ret;
 			goto cleanup;
 		}
-		td = urb_priv->td[i];
+		td = &urb_priv->td[i];
 
 		/* use SIA as default, if frame id is used overwrite it */
 		sia_frame_id = TRB_SIA;
@@ -3677,20 +3674,20 @@ cleanup:
 	/* Clean up a partially enqueued isoc transfer. */
 
 	for (i--; i >= 0; i--)
-		list_del_init(&urb_priv->td[i]->td_list);
+		list_del_init(&urb_priv->td[i].td_list);
 
 	/* Use the first TD as a temporary variable to turn the TDs we've queued
 	 * into No-ops with a software-owned cycle bit. That way the hardware
 	 * won't accidentally start executing bogus TDs when we partially
 	 * overwrite them.  td->first_trb and td->start_seg are already set.
 	 */
-	urb_priv->td[0]->last_trb = ep_ring->enqueue;
+	urb_priv->td[0].last_trb = ep_ring->enqueue;
 	/* Every TRB except the first & last will have its cycle bit flipped. */
-	td_to_noop(xhci, ep_ring, urb_priv->td[0], true);
+	td_to_noop(xhci, ep_ring, &urb_priv->td[0], true);
 
 	/* Reset the ring enqueue back to the first TRB and its cycle bit. */
-	ep_ring->enqueue = urb_priv->td[0]->first_trb;
-	ep_ring->enq_seg = urb_priv->td[0]->start_seg;
+	ep_ring->enqueue = urb_priv->td[0].first_trb;
+	ep_ring->enq_seg = urb_priv->td[0].start_seg;
 	ep_ring->cycle_state = start_cycle;
 	ep_ring->num_trbs_free = ep_ring->num_trbs_free_temp;
 	usb_hcd_unlink_urb_from_ep(bus_to_hcd(urb->dev->bus), urb);
@@ -3816,15 +3813,15 @@ static int queue_command(struct xhci_hcd *xhci, struct xhci_command *cmd,
 	}
 
 	cmd->command_trb = xhci->cmd_ring->enqueue;
-	list_add_tail(&cmd->cmd_list, &xhci->cmd_list);
 
 	/* if there are no other commands queued we start the timeout timer */
-	if (xhci->cmd_list.next == &cmd->cmd_list &&
-	    !delayed_work_pending(&xhci->cmd_timer)) {
+	if (list_empty(&xhci->cmd_list)) {
 		xhci->current_cmd = cmd;
 		xhci_mod_cmd_timer(xhci, XHCI_CMD_DEFAULT_TIMEOUT);
 	}
 
+	list_add_tail(&cmd->cmd_list, &xhci->cmd_list);
+
 	queue_trb(xhci, xhci->cmd_ring, false, field1, field2, field3,
 			field4 | xhci->cmd_ring->cycle_state);
 	return 0;
diff --git a/drivers/usb/host/xhci-trace.h b/drivers/usb/host/xhci-trace.h
index 59c05653b2ea..1ac2cdf8eece 100644
--- a/drivers/usb/host/xhci-trace.h
+++ b/drivers/usb/host/xhci-trace.h
@@ -103,7 +103,7 @@ DECLARE_EVENT_CLASS(xhci_log_ctx,
 			((HCC_64BYTE_CONTEXT(xhci->hcc_params) + 1) * 32) *
 			((ctx->type == XHCI_CTX_TYPE_INPUT) + ep_num + 1));
 	),
-	TP_printk("\nctx_64=%d, ctx_type=%u, ctx_dma=@%llx, ctx_va=@%p",
+	TP_printk("ctx_64=%d, ctx_type=%u, ctx_dma=@%llx, ctx_va=@%p",
 			__entry->ctx_64, __entry->ctx_type,
 			(unsigned long long) __entry->ctx_dma, __entry->ctx_va
 	)
@@ -115,34 +115,174 @@ DEFINE_EVENT(xhci_log_ctx, xhci_address_ctx,
 	TP_ARGS(xhci, ctx, ep_num)
 );
 
-DECLARE_EVENT_CLASS(xhci_log_event,
-	TP_PROTO(void *trb_va, struct xhci_generic_trb *ev),
-	TP_ARGS(trb_va, ev),
+DECLARE_EVENT_CLASS(xhci_log_trb,
+	TP_PROTO(struct xhci_ring *ring, struct xhci_generic_trb *trb),
+	TP_ARGS(ring, trb),
 	TP_STRUCT__entry(
-		__field(void *, va)
-		__field(u64, dma)
-		__field(u32, status)
-		__field(u32, flags)
-		__dynamic_array(u8, trb, sizeof(struct xhci_generic_trb))
+		__field(u32, type)
+		__field(u32, field0)
+		__field(u32, field1)
+		__field(u32, field2)
+		__field(u32, field3)
 	),
 	TP_fast_assign(
-		__entry->va = trb_va;
-		__entry->dma = ((u64)le32_to_cpu(ev->field[1])) << 32 |
-					le32_to_cpu(ev->field[0]);
-		__entry->status = le32_to_cpu(ev->field[2]);
-		__entry->flags = le32_to_cpu(ev->field[3]);
-		memcpy(__get_dynamic_array(trb), trb_va,
-			sizeof(struct xhci_generic_trb));
+		__entry->type = ring->type;
+		__entry->field0 = le32_to_cpu(trb->field[0]);
+		__entry->field1 = le32_to_cpu(trb->field[1]);
+		__entry->field2 = le32_to_cpu(trb->field[2]);
+		__entry->field3 = le32_to_cpu(trb->field[3]);
 	),
-	TP_printk("\ntrb_dma=@%llx, trb_va=@%p, status=%08x, flags=%08x",
-			(unsigned long long) __entry->dma, __entry->va,
-			__entry->status, __entry->flags
+	TP_printk("%s: %s", xhci_ring_type_string(__entry->type),
+			xhci_decode_trb(__entry->field0, __entry->field1,
+					__entry->field2, __entry->field3)
 	)
 );
 
-DEFINE_EVENT(xhci_log_event, xhci_cmd_completion,
-	TP_PROTO(void *trb_va, struct xhci_generic_trb *ev),
-	TP_ARGS(trb_va, ev)
+DEFINE_EVENT(xhci_log_trb, xhci_handle_event,
+	TP_PROTO(struct xhci_ring *ring, struct xhci_generic_trb *trb),
+	TP_ARGS(ring, trb)
+);
+
+DEFINE_EVENT(xhci_log_trb, xhci_handle_command,
+	TP_PROTO(struct xhci_ring *ring, struct xhci_generic_trb *trb),
+	TP_ARGS(ring, trb)
+);
+
+DEFINE_EVENT(xhci_log_trb, xhci_handle_transfer,
+	TP_PROTO(struct xhci_ring *ring, struct xhci_generic_trb *trb),
+	TP_ARGS(ring, trb)
+);
+
+DEFINE_EVENT(xhci_log_trb, xhci_queue_trb,
+	TP_PROTO(struct xhci_ring *ring, struct xhci_generic_trb *trb),
+	TP_ARGS(ring, trb)
+);
+
+DECLARE_EVENT_CLASS(xhci_log_virt_dev,
+	TP_PROTO(struct xhci_virt_device *vdev),
+	TP_ARGS(vdev),
+	TP_STRUCT__entry(
+		__field(void *, vdev)
+		__field(unsigned long long, out_ctx)
+		__field(unsigned long long, in_ctx)
+		__field(int, devnum)
+		__field(int, state)
+		__field(int, speed)
+		__field(u8, portnum)
+		__field(u8, level)
+		__field(int, slot_id)
+	),
+	TP_fast_assign(
+		__entry->vdev = vdev;
+		__entry->in_ctx = (unsigned long long) vdev->in_ctx->dma;
+		__entry->out_ctx = (unsigned long long) vdev->out_ctx->dma;
+		__entry->devnum = vdev->udev->devnum;
+		__entry->state = vdev->udev->state;
+		__entry->speed = vdev->udev->speed;
+		__entry->portnum = vdev->udev->portnum;
+		__entry->level = vdev->udev->level;
+		__entry->slot_id = vdev->udev->slot_id;
+	),
+	TP_printk("vdev %p ctx %llx | %llx num %d state %d speed %d port %d level %d slot %d",
+		__entry->vdev, __entry->in_ctx, __entry->out_ctx,
+		__entry->devnum, __entry->state, __entry->speed,
+		__entry->portnum, __entry->level, __entry->slot_id
+	)
+);
+
+DEFINE_EVENT(xhci_log_virt_dev, xhci_alloc_virt_device,
+	TP_PROTO(struct xhci_virt_device *vdev),
+	TP_ARGS(vdev)
+);
+
+DEFINE_EVENT(xhci_log_virt_dev, xhci_free_virt_device,
+	TP_PROTO(struct xhci_virt_device *vdev),
+	TP_ARGS(vdev)
+);
+
+DEFINE_EVENT(xhci_log_virt_dev, xhci_setup_device,
+	TP_PROTO(struct xhci_virt_device *vdev),
+	TP_ARGS(vdev)
+);
+
+DEFINE_EVENT(xhci_log_virt_dev, xhci_setup_addressable_virt_device,
+	TP_PROTO(struct xhci_virt_device *vdev),
+	TP_ARGS(vdev)
+);
+
+DEFINE_EVENT(xhci_log_virt_dev, xhci_stop_device,
+	TP_PROTO(struct xhci_virt_device *vdev),
+	TP_ARGS(vdev)
+);
+
+DECLARE_EVENT_CLASS(xhci_log_urb,
+	TP_PROTO(struct urb *urb),
+	TP_ARGS(urb),
+	TP_STRUCT__entry(
+		__field(void *, urb)
+		__field(unsigned int, pipe)
+		__field(unsigned int, stream)
+		__field(int, status)
+		__field(unsigned int, flags)
+		__field(int, num_mapped_sgs)
+		__field(int, num_sgs)
+		__field(int, length)
+		__field(int, actual)
+		__field(int, epnum)
+		__field(int, dir_in)
+		__field(int, type)
+	),
+	TP_fast_assign(
+		__entry->urb = urb;
+		__entry->pipe = urb->pipe;
+		__entry->stream = urb->stream_id;
+		__entry->status = urb->status;
+		__entry->flags = urb->transfer_flags;
+		__entry->num_mapped_sgs = urb->num_mapped_sgs;
+		__entry->num_sgs = urb->num_sgs;
+		__entry->length = urb->transfer_buffer_length;
+		__entry->actual = urb->actual_length;
+		__entry->epnum = usb_endpoint_num(&urb->ep->desc);
+		__entry->dir_in = usb_endpoint_dir_in(&urb->ep->desc);
+		__entry->type = usb_endpoint_type(&urb->ep->desc);
+	),
+	TP_printk("ep%d%s-%s: urb %p pipe %u length %d/%d sgs %d/%d stream %d flags %08x",
+			__entry->epnum, __entry->dir_in ? "in" : "out",
+			({ char *s;
+			switch (__entry->type) {
+			case USB_ENDPOINT_XFER_INT:
+				s = "intr";
+				break;
+			case USB_ENDPOINT_XFER_CONTROL:
+				s = "control";
+				break;
+			case USB_ENDPOINT_XFER_BULK:
+				s = "bulk";
+				break;
+			case USB_ENDPOINT_XFER_ISOC:
+				s = "isoc";
+				break;
+			default:
+				s = "UNKNOWN";
+			} s; }), __entry->urb, __entry->pipe, __entry->actual,
+			__entry->length, __entry->num_mapped_sgs,
+			__entry->num_sgs, __entry->stream, __entry->flags
+		)
+);
+
+DEFINE_EVENT(xhci_log_urb, xhci_urb_enqueue,
+	TP_PROTO(struct urb *urb),
+	TP_ARGS(urb)
+);
+
+DEFINE_EVENT(xhci_log_urb, xhci_urb_giveback,
+	TP_PROTO(struct urb *urb),
+	TP_ARGS(urb)
+);
+
+DEFINE_EVENT(xhci_log_urb, xhci_urb_dequeue,
+	TP_PROTO(struct urb *urb),
+	TP_ARGS(urb)
 );
 
 #endif /* __XHCI_TRACE_H */
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 9a0ec116654a..6d6c46000e56 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -207,7 +207,7 @@ int xhci_reset(struct xhci_hcd *xhci)
 	ret = xhci_handshake(&xhci->op_regs->status,
 			STS_CNR, 0, 10 * 1000 * 1000);
 
-	for (i = 0; i < 2; ++i) {
+	for (i = 0; i < 2; i++) {
 		xhci->bus_state[i].port_c_suspend = 0;
 		xhci->bus_state[i].suspended_ports = 0;
 		xhci->bus_state[i].resuming_ports = 0;
@@ -1332,12 +1332,11 @@ command_cleanup:
 int xhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, gfp_t mem_flags)
 {
 	struct xhci_hcd *xhci = hcd_to_xhci(hcd);
-	struct xhci_td *buffer;
 	unsigned long flags;
 	int ret = 0;
-	unsigned int slot_id, ep_index;
+	unsigned int slot_id, ep_index, ep_state;
 	struct urb_priv	*urb_priv;
-	int size, i;
+	int num_tds;
 
 	if (!urb || xhci_check_args(hcd, urb->dev, urb->ep,
 					true, true, __func__) <= 0)
@@ -1349,40 +1348,30 @@ int xhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, gfp_t mem_flags)
 	if (!HCD_HW_ACCESSIBLE(hcd)) {
 		if (!in_interrupt())
 			xhci_dbg(xhci, "urb submitted during PCI suspend\n");
-		ret = -ESHUTDOWN;
-		goto exit;
+		return -ESHUTDOWN;
 	}
 
 	if (usb_endpoint_xfer_isoc(&urb->ep->desc))
-		size = urb->number_of_packets;
+		num_tds = urb->number_of_packets;
 	else if (usb_endpoint_is_bulk_out(&urb->ep->desc) &&
 	    urb->transfer_buffer_length > 0 &&
 	    urb->transfer_flags & URB_ZERO_PACKET &&
 	    !(urb->transfer_buffer_length % usb_endpoint_maxp(&urb->ep->desc)))
-		size = 2;
+		num_tds = 2;
 	else
-		size = 1;
+		num_tds = 1;
 
 	urb_priv = kzalloc(sizeof(struct urb_priv) +
-				  size * sizeof(struct xhci_td *), mem_flags);
+			   num_tds * sizeof(struct xhci_td), mem_flags);
 	if (!urb_priv)
 		return -ENOMEM;
 
-	buffer = kzalloc(size * sizeof(struct xhci_td), mem_flags);
-	if (!buffer) {
-		kfree(urb_priv);
-		return -ENOMEM;
-	}
-
-	for (i = 0; i < size; i++) {
-		urb_priv->td[i] = buffer;
-		buffer++;
-	}
-
-	urb_priv->length = size;
-	urb_priv->td_cnt = 0;
+	urb_priv->num_tds = num_tds;
+	urb_priv->num_tds_done = 0;
 	urb->hcpriv = urb_priv;
 
+	trace_xhci_urb_enqueue(urb);
+
 	if (usb_endpoint_xfer_control(&urb->ep->desc)) {
 		/* Check to see if the max packet size for the default control
 		 * endpoint changed during FS device enumeration
@@ -1396,69 +1385,51 @@ int xhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, gfp_t mem_flags)
 				return ret;
 			}
 		}
+	}
 
-		/* We have a spinlock and interrupts disabled, so we must pass
-		 * atomic context to this function, which may allocate memory.
-		 */
-		spin_lock_irqsave(&xhci->lock, flags);
-		if (xhci->xhc_state & XHCI_STATE_DYING)
-			goto dying;
+	spin_lock_irqsave(&xhci->lock, flags);
+
+	if (xhci->xhc_state & XHCI_STATE_DYING) {
+		xhci_dbg(xhci, "Ep 0x%x: URB %p submitted for non-responsive xHCI host.\n",
+			 urb->ep->desc.bEndpointAddress, urb);
+		ret = -ESHUTDOWN;
+		goto free_priv;
+	}
+
+	switch (usb_endpoint_type(&urb->ep->desc)) {
+
+	case USB_ENDPOINT_XFER_CONTROL:
 		ret = xhci_queue_ctrl_tx(xhci, GFP_ATOMIC, urb,
-				slot_id, ep_index);
-		if (ret)
-			goto free_priv;
-		spin_unlock_irqrestore(&xhci->lock, flags);
-	} else if (usb_endpoint_xfer_bulk(&urb->ep->desc)) {
-		spin_lock_irqsave(&xhci->lock, flags);
-		if (xhci->xhc_state & XHCI_STATE_DYING)
-			goto dying;
-		if (xhci->devs[slot_id]->eps[ep_index].ep_state &
-				EP_GETTING_STREAMS) {
-			xhci_warn(xhci, "WARN: Can't enqueue URB while bulk ep "
-					"is transitioning to using streams.\n");
-			ret = -EINVAL;
-		} else if (xhci->devs[slot_id]->eps[ep_index].ep_state &
-				EP_GETTING_NO_STREAMS) {
-			xhci_warn(xhci, "WARN: Can't enqueue URB while bulk ep "
-					"is transitioning to "
-					"not having streams.\n");
+					 slot_id, ep_index);
+		break;
+	case USB_ENDPOINT_XFER_BULK:
+		ep_state = xhci->devs[slot_id]->eps[ep_index].ep_state;
+		if (ep_state & (EP_GETTING_STREAMS | EP_GETTING_NO_STREAMS)) {
+			xhci_warn(xhci, "WARN: Can't enqueue URB, ep in streams transition state %x\n",
+				  ep_state);
 			ret = -EINVAL;
-		} else {
-			ret = xhci_queue_bulk_tx(xhci, GFP_ATOMIC, urb,
-					slot_id, ep_index);
+			break;
 		}
-		if (ret)
-			goto free_priv;
-		spin_unlock_irqrestore(&xhci->lock, flags);
-	} else if (usb_endpoint_xfer_int(&urb->ep->desc)) {
-		spin_lock_irqsave(&xhci->lock, flags);
-		if (xhci->xhc_state & XHCI_STATE_DYING)
-			goto dying;
+		ret = xhci_queue_bulk_tx(xhci, GFP_ATOMIC, urb,
+					 slot_id, ep_index);
+		break;
+
+
+	case USB_ENDPOINT_XFER_INT:
 		ret = xhci_queue_intr_tx(xhci, GFP_ATOMIC, urb,
 				slot_id, ep_index);
-		if (ret)
-			goto free_priv;
-		spin_unlock_irqrestore(&xhci->lock, flags);
-	} else {
-		spin_lock_irqsave(&xhci->lock, flags);
-		if (xhci->xhc_state & XHCI_STATE_DYING)
-			goto dying;
+		break;
+
+	case USB_ENDPOINT_XFER_ISOC:
 		ret = xhci_queue_isoc_tx_prepare(xhci, GFP_ATOMIC, urb,
 				slot_id, ep_index);
-		if (ret)
-			goto free_priv;
-		spin_unlock_irqrestore(&xhci->lock, flags);
 	}
-exit:
-	return ret;
-dying:
-	xhci_dbg(xhci, "Ep 0x%x: URB %p submitted for "
-			"non-responsive xHCI host.\n",
-			urb->ep->desc.bEndpointAddress, urb);
-	ret = -ESHUTDOWN;
+
+	if (ret) {
 free_priv:
-	xhci_urb_free_priv(urb_priv);
-	urb->hcpriv = NULL;
+		xhci_urb_free_priv(urb_priv);
+		urb->hcpriv = NULL;
+	}
 	spin_unlock_irqrestore(&xhci->lock, flags);
 	return ret;
 }
@@ -1509,6 +1480,9 @@ int xhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
 
 	xhci = hcd_to_xhci(hcd);
 	spin_lock_irqsave(&xhci->lock, flags);
+
+	trace_xhci_urb_dequeue(urb);
+
 	/* Make sure the URB hasn't completed or been unlinked already */
 	ret = usb_hcd_check_unlink_urb(hcd, urb, status);
 	if (ret || !urb->hcpriv)
@@ -1518,10 +1492,10 @@ int xhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
 		xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb,
 				"HW died, freeing TD.");
 		urb_priv = urb->hcpriv;
-		for (i = urb_priv->td_cnt;
-		     i < urb_priv->length && xhci->devs[urb->dev->slot_id];
+		for (i = urb_priv->num_tds_done;
+		     i < urb_priv->num_tds && xhci->devs[urb->dev->slot_id];
 		     i++) {
-			td = urb_priv->td[i];
+			td = &urb_priv->td[i];
 			if (!list_empty(&td->td_list))
 				list_del_init(&td->td_list);
 			if (!list_empty(&td->cancelled_td_list))
@@ -1544,33 +1518,32 @@ int xhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
 	}
 
 	urb_priv = urb->hcpriv;
-	i = urb_priv->td_cnt;
-	if (i < urb_priv->length)
+	i = urb_priv->num_tds_done;
+	if (i < urb_priv->num_tds)
 		xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb,
 				"Cancel URB %p, dev %s, ep 0x%x, "
 				"starting at offset 0x%llx",
 				urb, urb->dev->devpath,
 				urb->ep->desc.bEndpointAddress,
 				(unsigned long long) xhci_trb_virt_to_dma(
-					urb_priv->td[i]->start_seg,
-					urb_priv->td[i]->first_trb));
+					urb_priv->td[i].start_seg,
+					urb_priv->td[i].first_trb));
 
-	for (; i < urb_priv->length; i++) {
-		td = urb_priv->td[i];
+	for (; i < urb_priv->num_tds; i++) {
+		td = &urb_priv->td[i];
 		list_add_tail(&td->cancelled_td_list, &ep->cancelled_td_list);
 	}
 
 	/* Queue a stop endpoint command, but only if this is
 	 * the first cancellation to be handled.
 	 */
-	if (!(ep->ep_state & EP_HALT_PENDING)) {
+	if (!(ep->ep_state & EP_STOP_CMD_PENDING)) {
 		command = xhci_alloc_command(xhci, false, false, GFP_ATOMIC);
 		if (!command) {
 			ret = -ENOMEM;
 			goto done;
 		}
-		ep->ep_state |= EP_HALT_PENDING;
-		ep->stop_cmds_pending++;
+		ep->ep_state |= EP_STOP_CMD_PENDING;
 		ep->stop_cmd_timer.expires = jiffies +
 			XHCI_STOP_EP_CMD_TIMEOUT * HZ;
 		add_timer(&ep->stop_cmd_timer);
@@ -1809,7 +1782,7 @@ static void xhci_zero_in_ctx(struct xhci_hcd *xhci, struct xhci_virt_device *vir
 	slot_ctx->dev_info &= cpu_to_le32(~LAST_CTX_MASK);
 	/* Endpoint 0 is always valid */
 	slot_ctx->dev_info |= cpu_to_le32(LAST_CTX(1));
-	for (i = 1; i < 31; ++i) {
+	for (i = 1; i < 31; i++) {
 		ep_ctx = xhci_get_ep_ctx(xhci, virt_dev->in_ctx, i);
 		ep_ctx->ep_info = 0;
 		ep_ctx->ep_info2 = 0;
@@ -1824,32 +1797,32 @@ static int xhci_configure_endpoint_result(struct xhci_hcd *xhci,
 	int ret;
 
 	switch (*cmd_status) {
-	case COMP_CMD_ABORT:
-	case COMP_CMD_STOP:
+	case COMP_COMMAND_ABORTED:
+	case COMP_STOPPED:
 		xhci_warn(xhci, "Timeout while waiting for configure endpoint command\n");
 		ret = -ETIME;
 		break;
-	case COMP_ENOMEM:
+	case COMP_RESOURCE_ERROR:
 		dev_warn(&udev->dev,
 			 "Not enough host controller resources for new device state.\n");
 		ret = -ENOMEM;
 		/* FIXME: can we allocate more resources for the HC? */
 		break;
-	case COMP_BW_ERR:
-	case COMP_2ND_BW_ERR:
+	case COMP_BANDWIDTH_ERROR:
+	case COMP_SECONDARY_BANDWIDTH_ERROR:
 		dev_warn(&udev->dev,
 			 "Not enough bandwidth for new device state.\n");
 		ret = -ENOSPC;
 		/* FIXME: can we go back to the old state? */
 		break;
-	case COMP_TRB_ERR:
+	case COMP_TRB_ERROR:
 		/* the HCD set up something wrong */
 		dev_warn(&udev->dev, "ERROR: Endpoint drop flag = 0, "
 				"add flag = 1, "
 				"and endpoint is not disabled.\n");
 		ret = -EINVAL;
 		break;
-	case COMP_DEV_ERR:
+	case COMP_INCOMPATIBLE_DEVICE_ERROR:
 		dev_warn(&udev->dev,
 			 "ERROR: Incompatible device for endpoint configure command.\n");
 		ret = -ENODEV;
@@ -1875,33 +1848,33 @@ static int xhci_evaluate_context_result(struct xhci_hcd *xhci,
 	struct xhci_virt_device *virt_dev = xhci->devs[udev->slot_id];
 
 	switch (*cmd_status) {
-	case COMP_CMD_ABORT:
-	case COMP_CMD_STOP:
+	case COMP_COMMAND_ABORTED:
+	case COMP_STOPPED:
 		xhci_warn(xhci, "Timeout while waiting for evaluate context command\n");
 		ret = -ETIME;
 		break;
-	case COMP_EINVAL:
+	case COMP_PARAMETER_ERROR:
 		dev_warn(&udev->dev,
 			 "WARN: xHCI driver setup invalid evaluate context command.\n");
 		ret = -EINVAL;
 		break;
-	case COMP_EBADSLT:
+	case COMP_SLOT_NOT_ENABLED_ERROR:
 		dev_warn(&udev->dev,
 			"WARN: slot not enabled for evaluate context command.\n");
 		ret = -EINVAL;
 		break;
-	case COMP_CTX_STATE:
+	case COMP_CONTEXT_STATE_ERROR:
 		dev_warn(&udev->dev,
 			"WARN: invalid context state for evaluate context command.\n");
 		xhci_dbg_ctx(xhci, virt_dev->out_ctx, 1);
 		ret = -EINVAL;
 		break;
-	case COMP_DEV_ERR:
+	case COMP_INCOMPATIBLE_DEVICE_ERROR:
 		dev_warn(&udev->dev,
 			"ERROR: Incompatible device for evaluate context command.\n");
 		ret = -ENODEV;
 		break;
-	case COMP_MEL_ERR:
+	case COMP_MAX_EXIT_LATENCY_TOO_LARGE_ERROR:
 		/* Max Exit Latency too large error */
 		dev_warn(&udev->dev, "WARN: Max Exit Latency too large\n");
 		ret = -EINVAL;
@@ -2781,7 +2754,7 @@ int xhci_check_bandwidth(struct usb_hcd *hcd, struct usb_device *udev)
 		     LAST_CTX_TO_EP_NUM(le32_to_cpu(slot_ctx->dev_info)));
 
 	/* Free any rings that were dropped, but not changed. */
-	for (i = 1; i < 31; ++i) {
+	for (i = 1; i < 31; i++) {
 		if ((le32_to_cpu(ctrl_ctx->drop_flags) & (1 << (i + 1))) &&
 		    !(le32_to_cpu(ctrl_ctx->add_flags) & (1 << (i + 1)))) {
 			xhci_free_or_cache_endpoint_ring(xhci, virt_dev, i);
@@ -2793,7 +2766,7 @@ int xhci_check_bandwidth(struct usb_hcd *hcd, struct usb_device *udev)
 	 * Install any rings for completely new endpoints or changed endpoints,
 	 * and free or cache any old rings from changed endpoints.
 	 */
-	for (i = 1; i < 31; ++i) {
+	for (i = 1; i < 31; i++) {
 		if (!virt_dev->eps[i].new_ring)
 			continue;
 		/* Only cache or free the old ring if it exists.
@@ -2827,7 +2800,7 @@ void xhci_reset_bandwidth(struct usb_hcd *hcd, struct usb_device *udev)
 	xhci_dbg(xhci, "%s called for udev %p\n", __func__, udev);
 	virt_dev = xhci->devs[udev->slot_id];
 	/* Free any rings allocated for added endpoints */
-	for (i = 0; i < 31; ++i) {
+	for (i = 0; i < 31; i++) {
 		if (virt_dev->eps[i].new_ring) {
 			xhci_ring_free(xhci, virt_dev->eps[i].new_ring);
 			virt_dev->eps[i].new_ring = NULL;
@@ -3497,13 +3470,13 @@ int xhci_discover_or_reset_device(struct usb_hcd *hcd, struct usb_device *udev)
 	 */
 	ret = reset_device_cmd->status;
 	switch (ret) {
-	case COMP_CMD_ABORT:
-	case COMP_CMD_STOP:
+	case COMP_COMMAND_ABORTED:
+	case COMP_STOPPED:
 		xhci_warn(xhci, "Timeout waiting for reset device command\n");
 		ret = -ETIME;
 		goto command_cleanup;
-	case COMP_EBADSLT: /* 0.95 completion code for bad slot ID */
-	case COMP_CTX_STATE: /* 0.96 completion code for same thing */
+	case COMP_SLOT_NOT_ENABLED_ERROR: /* 0.95 completion for bad slot ID */
+	case COMP_CONTEXT_STATE_ERROR: /* 0.96 completion code for same thing */
 		xhci_dbg(xhci, "Can't reset device (slot ID %u) in %s state\n",
 				slot_id,
 				xhci_get_slot_state(xhci, virt_dev->out_ctx));
@@ -3533,7 +3506,7 @@ int xhci_discover_or_reset_device(struct usb_hcd *hcd, struct usb_device *udev)
 
 	/* Everything but endpoint 0 is disabled, so free or cache the rings. */
 	last_freed_endpoint = 1;
-	for (i = 1; i < 31; ++i) {
+	for (i = 1; i < 31; i++) {
 		struct xhci_virt_ep *ep = &virt_dev->eps[i];
 
 		if (ep->ep_state & EP_HAS_STREAMS) {
@@ -3609,8 +3582,8 @@ void xhci_free_dev(struct usb_hcd *hcd, struct usb_device *udev)
 	virt_dev = xhci->devs[udev->slot_id];
 
 	/* Stop any wayward timer functions (which may grab the lock) */
-	for (i = 0; i < 31; ++i) {
-		virt_dev->eps[i].ep_state &= ~EP_HALT_PENDING;
+	for (i = 0; i < 31; i++) {
+		virt_dev->eps[i].ep_state &= ~EP_STOP_CMD_PENDING;
 		del_timer_sync(&virt_dev->eps[i].stop_cmd_timer);
 	}
 
@@ -3844,6 +3817,7 @@ static int xhci_setup_device(struct usb_hcd *hcd, struct usb_device *udev,
 				le32_to_cpu(slot_ctx->dev_info) >> 27);
 
 	spin_lock_irqsave(&xhci->lock, flags);
+	trace_xhci_setup_device(virt_dev);
 	ret = xhci_queue_address_device(xhci, command, virt_dev->in_ctx->dma,
 					udev->slot_id, setup);
 	if (ret) {
@@ -3863,22 +3837,22 @@ static int xhci_setup_device(struct usb_hcd *hcd, struct usb_device *udev,
 	 * command on a timeout.
 	 */
 	switch (command->status) {
-	case COMP_CMD_ABORT:
-	case COMP_CMD_STOP:
+	case COMP_COMMAND_ABORTED:
+	case COMP_STOPPED:
 		xhci_warn(xhci, "Timeout while waiting for setup device command\n");
 		ret = -ETIME;
 		break;
-	case COMP_CTX_STATE:
-	case COMP_EBADSLT:
+	case COMP_CONTEXT_STATE_ERROR:
+	case COMP_SLOT_NOT_ENABLED_ERROR:
 		xhci_err(xhci, "Setup ERROR: setup %s command for slot %d.\n",
 			 act, udev->slot_id);
 		ret = -EINVAL;
 		break;
-	case COMP_TX_ERR:
+	case COMP_USB_TRANSACTION_ERROR:
 		dev_warn(&udev->dev, "Device not responding to setup %s.\n", act);
 		ret = -EPROTO;
 		break;
-	case COMP_DEV_ERR:
+	case COMP_INCOMPATIBLE_DEVICE_ERROR:
 		dev_warn(&udev->dev,
 			 "ERROR: Incompatible device for setup %s command\n", act);
 		ret = -ENODEV;
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index 2d7b6374b58d..da3eb695fe54 100644
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -912,7 +912,7 @@ struct xhci_virt_ep {
 	unsigned int			ep_state;
 #define SET_DEQ_PENDING		(1 << 0)
 #define EP_HALTED		(1 << 1)	/* For stall handling */
-#define EP_HALT_PENDING		(1 << 2)	/* For URB cancellation */
+#define EP_STOP_CMD_PENDING	(1 << 2)	/* For URB cancellation */
 /* Transitioning the endpoint to using streams, don't enqueue URBs */
 #define EP_GETTING_STREAMS	(1 << 3)
 #define EP_HAS_STREAMS		(1 << 4)
@@ -924,7 +924,6 @@ struct xhci_virt_ep {
 	unsigned int		stopped_stream;
 	/* Watchdog timer for stop endpoint command to cancel URBs */
 	struct timer_list	stop_cmd_timer;
-	int			stop_cmds_pending;
 	struct xhci_hcd		*xhci;
 	/* Dequeue pointer and dequeue segment for a submitted Set TR Dequeue
 	 * command.  We'll need to update the ring's dequeue segment and dequeue
@@ -1061,76 +1060,122 @@ struct xhci_transfer_event {
 /* Completion Code - only applicable for some types of TRBs */
 #define	COMP_CODE_MASK		(0xff << 24)
 #define GET_COMP_CODE(p)	(((p) & COMP_CODE_MASK) >> 24)
-#define COMP_SUCCESS	1
-/* Data Buffer Error */
-#define COMP_DB_ERR	2
-/* Babble Detected Error */
-#define COMP_BABBLE	3
-/* USB Transaction Error */
-#define COMP_TX_ERR	4
-/* TRB Error - some TRB field is invalid */
-#define COMP_TRB_ERR	5
-/* Stall Error - USB device is stalled */
-#define COMP_STALL	6
-/* Resource Error - HC doesn't have memory for that device configuration */
-#define COMP_ENOMEM	7
-/* Bandwidth Error - not enough room in schedule for this dev config */
-#define COMP_BW_ERR	8
-/* No Slots Available Error - HC ran out of device slots */
-#define COMP_ENOSLOTS	9
-/* Invalid Stream Type Error */
-#define COMP_STREAM_ERR	10
-/* Slot Not Enabled Error - doorbell rung for disabled device slot */
-#define COMP_EBADSLT	11
-/* Endpoint Not Enabled Error */
-#define COMP_EBADEP	12
-/* Short Packet */
-#define COMP_SHORT_TX	13
-/* Ring Underrun - doorbell rung for an empty isoc OUT ep ring */
-#define COMP_UNDERRUN	14
-/* Ring Overrun - isoc IN ep ring is empty when ep is scheduled to RX */
-#define COMP_OVERRUN	15
-/* Virtual Function Event Ring Full Error */
-#define COMP_VF_FULL	16
-/* Parameter Error - Context parameter is invalid */
-#define COMP_EINVAL	17
-/* Bandwidth Overrun Error - isoc ep exceeded its allocated bandwidth */
-#define COMP_BW_OVER	18
-/* Context State Error - illegal context state transition requested */
-#define COMP_CTX_STATE	19
-/* No Ping Response Error - HC didn't get PING_RESPONSE in time to TX */
-#define COMP_PING_ERR	20
-/* Event Ring is full */
-#define COMP_ER_FULL	21
-/* Incompatible Device Error */
-#define COMP_DEV_ERR	22
-/* Missed Service Error - HC couldn't service an isoc ep within interval */
-#define COMP_MISSED_INT	23
-/* Successfully stopped command ring */
-#define COMP_CMD_STOP	24
-/* Successfully aborted current command and stopped command ring */
-#define COMP_CMD_ABORT	25
-/* Stopped - transfer was terminated by a stop endpoint command */
-#define COMP_STOP	26
-/* Same as COMP_EP_STOPPED, but the transferred length in the event is invalid */
-#define COMP_STOP_INVAL	27
-/* Same as COMP_EP_STOPPED, but a short packet detected */
-#define COMP_STOP_SHORT	28
-/* Max Exit Latency Too Large Error */
-#define COMP_MEL_ERR	29
-/* TRB type 30 reserved */
-/* Isoc Buffer Overrun - an isoc IN ep sent more data than could fit in TD */
-#define COMP_BUFF_OVER	31
-/* Event Lost Error - xHC has an "internal event overrun condition" */
-#define COMP_ISSUES	32
-/* Undefined Error - reported when other error codes don't apply */
-#define COMP_UNKNOWN	33
-/* Invalid Stream ID Error */
-#define COMP_STRID_ERR	34
-/* Secondary Bandwidth Error - may be returned by a Configure Endpoint cmd */
-#define COMP_2ND_BW_ERR	35
-/* Split Transaction Error */
-#define	COMP_SPLIT_ERR	36
+#define COMP_INVALID				0
+#define COMP_SUCCESS				1
+#define COMP_DATA_BUFFER_ERROR			2
+#define COMP_BABBLE_DETECTED_ERROR		3
+#define COMP_USB_TRANSACTION_ERROR		4
+#define COMP_TRB_ERROR				5
+#define COMP_STALL_ERROR			6
+#define COMP_RESOURCE_ERROR			7
+#define COMP_BANDWIDTH_ERROR			8
+#define COMP_NO_SLOTS_AVAILABLE_ERROR		9
+#define COMP_INVALID_STREAM_TYPE_ERROR		10
+#define COMP_SLOT_NOT_ENABLED_ERROR		11
+#define COMP_ENDPOINT_NOT_ENABLED_ERROR		12
+#define COMP_SHORT_PACKET			13
+#define COMP_RING_UNDERRUN			14
+#define COMP_RING_OVERRUN			15
+#define COMP_VF_EVENT_RING_FULL_ERROR		16
+#define COMP_PARAMETER_ERROR			17
+#define COMP_BANDWIDTH_OVERRUN_ERROR		18
+#define COMP_CONTEXT_STATE_ERROR		19
+#define COMP_NO_PING_RESPONSE_ERROR		20
+#define COMP_EVENT_RING_FULL_ERROR		21
+#define COMP_INCOMPATIBLE_DEVICE_ERROR		22
+#define COMP_MISSED_SERVICE_ERROR		23
+#define COMP_COMMAND_RING_STOPPED		24
+#define COMP_COMMAND_ABORTED			25
+#define COMP_STOPPED				26
+#define COMP_STOPPED_LENGTH_INVALID		27
+#define COMP_STOPPED_SHORT_PACKET		28
+#define COMP_MAX_EXIT_LATENCY_TOO_LARGE_ERROR	29
+#define COMP_ISOCH_BUFFER_OVERRUN		31
+#define COMP_EVENT_LOST_ERROR			32
+#define COMP_UNDEFINED_ERROR			33
+#define COMP_INVALID_STREAM_ID_ERROR		34
+#define COMP_SECONDARY_BANDWIDTH_ERROR		35
+#define COMP_SPLIT_TRANSACTION_ERROR		36
+
+static inline const char *xhci_trb_comp_code_string(u8 status)
+{
+	switch (status) {
+	case COMP_INVALID:
+		return "Invalid";
+	case COMP_SUCCESS:
+		return "Success";
+	case COMP_DATA_BUFFER_ERROR:
+		return "Data Buffer Error";
+	case COMP_BABBLE_DETECTED_ERROR:
+		return "Babble Detected";
+	case COMP_USB_TRANSACTION_ERROR:
+		return "USB Transaction Error";
+	case COMP_TRB_ERROR:
+		return "TRB Error";
+	case COMP_STALL_ERROR:
+		return "Stall Error";
+	case COMP_RESOURCE_ERROR:
+		return "Resource Error";
+	case COMP_BANDWIDTH_ERROR:
+		return "Bandwidth Error";
+	case COMP_NO_SLOTS_AVAILABLE_ERROR:
+		return "No Slots Available Error";
+	case COMP_INVALID_STREAM_TYPE_ERROR:
+		return "Invalid Stream Type Error";
+	case COMP_SLOT_NOT_ENABLED_ERROR:
+		return "Slot Not Enabled Error";
+	case COMP_ENDPOINT_NOT_ENABLED_ERROR:
+		return "Endpoint Not Enabled Error";
+	case COMP_SHORT_PACKET:
+		return "Short Packet";
+	case COMP_RING_UNDERRUN:
+		return "Ring Underrun";
+	case COMP_RING_OVERRUN:
+		return "Ring Overrun";
+	case COMP_VF_EVENT_RING_FULL_ERROR:
+		return "VF Event Ring Full Error";
+	case COMP_PARAMETER_ERROR:
+		return "Parameter Error";
+	case COMP_BANDWIDTH_OVERRUN_ERROR:
+		return "Bandwidth Overrun Error";
+	case COMP_CONTEXT_STATE_ERROR:
+		return "Context State Error";
+	case COMP_NO_PING_RESPONSE_ERROR:
+		return "No Ping Response Error";
+	case COMP_EVENT_RING_FULL_ERROR:
+		return "Event Ring Full Error";
+	case COMP_INCOMPATIBLE_DEVICE_ERROR:
+		return "Incompatible Device Error";
+	case COMP_MISSED_SERVICE_ERROR:
+		return "Missed Service Error";
+	case COMP_COMMAND_RING_STOPPED:
+		return "Command Ring Stopped";
+	case COMP_COMMAND_ABORTED:
+		return "Command Aborted";
+	case COMP_STOPPED:
+		return "Stopped";
+	case COMP_STOPPED_LENGTH_INVALID:
+		return "Stopped - Length Invalid";
+	case COMP_STOPPED_SHORT_PACKET:
+		return "Stopped - Short Packet";
+	case COMP_MAX_EXIT_LATENCY_TOO_LARGE_ERROR:
+		return "Max Exit Latency Too Large Error";
+	case COMP_ISOCH_BUFFER_OVERRUN:
+		return "Isoch Buffer Overrun";
+	case COMP_EVENT_LOST_ERROR:
+		return "Event Lost Error";
+	case COMP_UNDEFINED_ERROR:
+		return "Undefined Error";
+	case COMP_INVALID_STREAM_ID_ERROR:
+		return "Invalid Stream ID Error";
+	case COMP_SECONDARY_BANDWIDTH_ERROR:
+		return "Secondary Bandwidth Error";
+	case COMP_SPLIT_TRANSACTION_ERROR:
+		return "Split Transaction Error";
+	default:
+		return "Unknown!!";
+	}
+}
 
 struct xhci_link_trb {
 	/* 64-bit segment pointer*/
@@ -1154,6 +1199,27 @@ struct xhci_event_cmd {
 
 /* Address device - disable SetAddress */
 #define TRB_BSR		(1<<9)
+
+/* Configure Endpoint - Deconfigure */
+#define TRB_DC		(1<<9)
+
+/* Stop Ring - Transfer State Preserve */
+#define TRB_TSP		(1<<9)
+
+/* Force Event */
+#define TRB_TO_VF_INTR_TARGET(p)	(((p) & (0x3ff << 22)) >> 22)
+#define TRB_TO_VF_ID(p)			(((p) & (0xff << 16)) >> 16)
+
+/* Set Latency Tolerance Value */
+#define TRB_TO_BELT(p)			(((p) & (0xfff << 16)) >> 16)
+
+/* Get Port Bandwidth */
+#define TRB_TO_DEV_SPEED(p)		(((p) & (0xf << 16)) >> 16)
+
+/* Force Header */
+#define TRB_TO_PACKET_TYPE(p)		((p) & 0x1f)
+#define TRB_TO_ROOTHUB_PORT(p)		(((p) & (0xff << 24)) >> 24)
+
 enum xhci_setup_dev {
 	SETUP_CONTEXT_ONLY,
 	SETUP_CONTEXT_ADDRESS,
@@ -1177,16 +1243,21 @@ enum xhci_setup_dev {
 #define STREAM_ID_FOR_TRB(p)		((((p)) & 0xffff) << 16)
 #define SCT_FOR_TRB(p)			(((p) << 1) & 0x7)
 
+/* Link TRB specific fields */
+#define TRB_TC			(1<<1)
 
 /* Port Status Change Event TRB fields */
 /* Port ID - bits 31:24 */
 #define GET_PORT_ID(p)		(((p) & (0xff << 24)) >> 24)
 
+#define EVENT_DATA		(1 << 2)
+
 /* Normal TRB fields */
 /* transfer_len bitmasks - bits 0:16 */
 #define	TRB_LEN(p)		((p) & 0x1ffff)
 /* TD Size, packets remaining in this TD, bits 21:17 (5 bits, so max 31) */
 #define TRB_TD_SIZE(p)          (min((p), (u32)31) << 17)
+#define GET_TD_SIZE(p)		(((p) & 0x3e0000) >> 17)
 /* xhci 1.1 uses the TD_SIZE field for TBC if Extended TBC is enabled (ETE) */
 #define TRB_TD_SIZE_TBC(p)      (min((p), (u32)31) << 17)
 /* Interrupter Target - which MSI-X vector to target the completion event at */
@@ -1314,6 +1385,80 @@ union xhci_trb {
 /* Get NEC firmware revision. */
 #define	TRB_NEC_GET_FW		49
 
+static inline const char *xhci_trb_type_string(u8 type)
+{
+	switch (type) {
+	case TRB_NORMAL:
+		return "Normal";
+	case TRB_SETUP:
+		return "Setup Stage";
+	case TRB_DATA:
+		return "Data Stage";
+	case TRB_STATUS:
+		return "Status Stage";
+	case TRB_ISOC:
+		return "Isoch";
+	case TRB_LINK:
+		return "Link";
+	case TRB_EVENT_DATA:
+		return "Event Data";
+	case TRB_TR_NOOP:
+		return "No-Op";
+	case TRB_ENABLE_SLOT:
+		return "Enable Slot Command";
+	case TRB_DISABLE_SLOT:
+		return "Disable Slot Command";
+	case TRB_ADDR_DEV:
+		return "Address Device Command";
+	case TRB_CONFIG_EP:
+		return "Configure Endpoint Command";
+	case TRB_EVAL_CONTEXT:
+		return "Evaluate Context Command";
+	case TRB_RESET_EP:
+		return "Reset Endpoint Command";
+	case TRB_STOP_RING:
+		return "Stop Ring Command";
+	case TRB_SET_DEQ:
+		return "Set TR Dequeue Pointer Command";
+	case TRB_RESET_DEV:
+		return "Reset Device Command";
+	case TRB_FORCE_EVENT:
+		return "Force Event Command";
+	case TRB_NEG_BANDWIDTH:
+		return "Negotiate Bandwidth Command";
+	case TRB_SET_LT:
+		return "Set Latency Tolerance Value Command";
+	case TRB_GET_BW:
+		return "Get Port Bandwidth Command";
+	case TRB_FORCE_HEADER:
+		return "Force Header Command";
+	case TRB_CMD_NOOP:
+		return "No-Op Command";
+	case TRB_TRANSFER:
+		return "Transfer Event";
+	case TRB_COMPLETION:
+		return "Command Completion Event";
+	case TRB_PORT_STATUS:
+		return "Port Status Change Event";
+	case TRB_BANDWIDTH_EVENT:
+		return "Bandwidth Request Event";
+	case TRB_DOORBELL:
+		return "Doorbell Event";
+	case TRB_HC_EVENT:
+		return "Host Controller Event";
+	case TRB_DEV_NOTE:
+		return "Device Notification Event";
+	case TRB_MFINDEX_WRAP:
+		return "MFINDEX Wrap Event";
+	case TRB_NEC_CMD_COMP:
+		return "NEC Command Completion Event";
+	case TRB_NEC_GET_FW:
+		return "NET Get Firmware Revision Command";
+	default:
+		return "UNKNOWN";
+	}
+}
+
 #define TRB_TYPE_LINK(x)	(((x) & TRB_TYPE_BITMASK) == TRB_TYPE(TRB_LINK))
 /* Above, but for __le32 types -- can avoid work by swapping constants: */
 #define TRB_TYPE_LINK_LE32(x)	(((x) & cpu_to_le32(TRB_TYPE_BITMASK)) == \
@@ -1390,6 +1535,28 @@ enum xhci_ring_type {
 	TYPE_EVENT,
 };
 
+static inline const char *xhci_ring_type_string(enum xhci_ring_type type)
+{
+	switch (type) {
+	case TYPE_CTRL:
+		return "CTRL";
+	case TYPE_ISOC:
+		return "ISOC";
+	case TYPE_BULK:
+		return "BULK";
+	case TYPE_INTR:
+		return "INTR";
+	case TYPE_STREAM:
+		return "STREAM";
+	case TYPE_COMMAND:
+		return "CMD";
+	case TYPE_EVENT:
+		return "EVENT";
+	}
+
+	return "UNKNOWN";
+}
+
 struct xhci_ring {
 	struct xhci_segment	*first_seg;
 	struct xhci_segment	*last_seg;
@@ -1441,9 +1608,9 @@ struct xhci_scratchpad {
 };
 
 struct urb_priv {
-	int	length;
-	int	td_cnt;
-	struct	xhci_td	*td[0];
+	int	num_tds;
+	int	num_tds_done;
+	struct	xhci_td	td[0];
 };
 
 /*
@@ -1549,7 +1716,6 @@ struct xhci_hcd {
 	u8		max_ports;
 	u8		isoc_threshold;
 	int		event_ring_max;
-	int		addr_64;
 	/* 4KB min, 128MB max */
 	int		page_size;
 	/* Valid values are 12 to 20, inclusive */
@@ -1650,6 +1816,9 @@ struct xhci_hcd {
 #define XHCI_SSIC_PORT_UNUSED	(1 << 22)
 #define XHCI_NO_64BIT_SUPPORT	(1 << 23)
 #define XHCI_MISSING_CAS	(1 << 24)
+/* For controller with a broken Port Disable implementation */
+#define XHCI_BROKEN_PORT_PED	(1 << 25)
+
 	unsigned int		num_active_eps;
 	unsigned int		limit_active_eps;
 	/* There are two roothubs to keep track of bus suspend info for */
@@ -1984,4 +2153,211 @@ static inline struct xhci_ring *xhci_urb_to_transfer_ring(struct xhci_hcd *xhci,
 					urb->stream_id);
 }
 
+static inline const char *xhci_decode_trb(u32 field0, u32 field1, u32 field2,
+		u32 field3)
+{
+	static char str[256];
+	int type = TRB_FIELD_TO_TYPE(field3);
+
+	switch (type) {
+	case TRB_LINK:
+		sprintf(str,
+			"TRB %08x%08x status '%s' len %d slot %d ep %d type '%s' flags %c:%c",
+			field1, field0,
+			xhci_trb_comp_code_string(GET_COMP_CODE(field2)),
+			EVENT_TRB_LEN(field2), TRB_TO_SLOT_ID(field3),
+			/* Macro decrements 1, maybe it shouldn't?!? */
+			TRB_TO_EP_INDEX(field3) + 1,
+			xhci_trb_type_string(TRB_FIELD_TO_TYPE(field3)),
+			field3 & EVENT_DATA ? 'E' : 'e',
+			field3 & TRB_CYCLE ? 'C' : 'c');
+		break;
+	case TRB_TRANSFER:
+	case TRB_COMPLETION:
+	case TRB_PORT_STATUS:
+	case TRB_BANDWIDTH_EVENT:
+	case TRB_DOORBELL:
+	case TRB_HC_EVENT:
+	case TRB_DEV_NOTE:
+	case TRB_MFINDEX_WRAP:
+		sprintf(str,
+			"TRB %08x%08x status '%s' len %d slot %d ep %d type '%s' flags %c:%c",
+			field1, field0,
+			xhci_trb_comp_code_string(GET_COMP_CODE(field2)),
+			EVENT_TRB_LEN(field2), TRB_TO_SLOT_ID(field3),
+			/* Macro decrements 1, maybe it shouldn't?!? */
+			TRB_TO_EP_INDEX(field3) + 1,
+			xhci_trb_type_string(TRB_FIELD_TO_TYPE(field3)),
+			field3 & EVENT_DATA ? 'E' : 'e',
+			field3 & TRB_CYCLE ? 'C' : 'c');
+
+		break;
+	case TRB_SETUP:
+		sprintf(str,
+			"bRequestType %02x bRequest %02x wValue %02x%02x wIndex %02x%02x wLength %d length %d TD size %d intr %d type '%s' flags %c:%c:%c:%c:%c:%c:%c:%c",
+			field0 & 0xff,
+			(field0 & 0xff00) >> 8,
+			(field0 & 0xff000000) >> 24,
+			(field0 & 0xff0000) >> 16,
+			(field1 & 0xff00) >> 8,
+			field1 & 0xff,
+			(field1 & 0xff000000) >> 16 |
+			(field1 & 0xff0000) >> 16,
+			TRB_LEN(field2), GET_TD_SIZE(field2),
+			GET_INTR_TARGET(field2),
+			xhci_trb_type_string(TRB_FIELD_TO_TYPE(field3)),
+			field3 & TRB_BEI ? 'B' : 'b',
+			field3 & TRB_IDT ? 'I' : 'i',
+			field3 & TRB_IOC ? 'I' : 'i',
+			field3 & TRB_CHAIN ? 'C' : 'c',
+			field3 & TRB_NO_SNOOP ? 'S' : 's',
+			field3 & TRB_ISP ? 'I' : 'i',
+			field3 & TRB_ENT ? 'E' : 'e',
+			field3 & TRB_CYCLE ? 'C' : 'c');
+		break;
+	case TRB_NORMAL:
+	case TRB_DATA:
+	case TRB_STATUS:
+	case TRB_ISOC:
+	case TRB_EVENT_DATA:
+	case TRB_TR_NOOP:
+		sprintf(str,
+			"Buffer %08x%08x length %d TD size %d intr %d type '%s' flags %c:%c:%c:%c:%c:%c:%c:%c",
+			field1, field0, TRB_LEN(field2), GET_TD_SIZE(field2),
+			GET_INTR_TARGET(field2),
+			xhci_trb_type_string(TRB_FIELD_TO_TYPE(field3)),
+			field3 & TRB_BEI ? 'B' : 'b',
+			field3 & TRB_IDT ? 'I' : 'i',
+			field3 & TRB_IOC ? 'I' : 'i',
+			field3 & TRB_CHAIN ? 'C' : 'c',
+			field3 & TRB_NO_SNOOP ? 'S' : 's',
+			field3 & TRB_ISP ? 'I' : 'i',
+			field3 & TRB_ENT ? 'E' : 'e',
+			field3 & TRB_CYCLE ? 'C' : 'c');
+		break;
+
+	case TRB_CMD_NOOP:
+	case TRB_ENABLE_SLOT:
+		sprintf(str,
+			"%s: flags %c",
+			xhci_trb_type_string(TRB_FIELD_TO_TYPE(field3)),
+			field3 & TRB_CYCLE ? 'C' : 'c');
+		break;
+	case TRB_DISABLE_SLOT:
+	case TRB_NEG_BANDWIDTH:
+		sprintf(str,
+			"%s: slot %d flags %c",
+			xhci_trb_type_string(TRB_FIELD_TO_TYPE(field3)),
+			TRB_TO_SLOT_ID(field3),
+			field3 & TRB_CYCLE ? 'C' : 'c');
+		break;
+	case TRB_ADDR_DEV:
+		sprintf(str,
+			"%s: ctx %08x%08x slot %d flags %c:%c",
+			xhci_trb_type_string(TRB_FIELD_TO_TYPE(field3)),
+			field1, field0,
+			TRB_TO_SLOT_ID(field3),
+			field3 & TRB_BSR ? 'B' : 'b',
+			field3 & TRB_CYCLE ? 'C' : 'c');
+		break;
+	case TRB_CONFIG_EP:
+		sprintf(str,
+			"%s: ctx %08x%08x slot %d flags %c:%c",
+			xhci_trb_type_string(TRB_FIELD_TO_TYPE(field3)),
+			field1, field0,
+			TRB_TO_SLOT_ID(field3),
+			field3 & TRB_DC ? 'D' : 'd',
+			field3 & TRB_CYCLE ? 'C' : 'c');
+		break;
+	case TRB_EVAL_CONTEXT:
+		sprintf(str,
+			"%s: ctx %08x%08x slot %d flags %c",
+			xhci_trb_type_string(TRB_FIELD_TO_TYPE(field3)),
+			field1, field0,
+			TRB_TO_SLOT_ID(field3),
+			field3 & TRB_CYCLE ? 'C' : 'c');
+		break;
+	case TRB_RESET_EP:
+		sprintf(str,
+			"%s: ctx %08x%08x slot %d ep %d flags %c",
+			xhci_trb_type_string(TRB_FIELD_TO_TYPE(field3)),
+			field1, field0,
+			TRB_TO_SLOT_ID(field3),
+			/* Macro decrements 1, maybe it shouldn't?!? */
+			TRB_TO_EP_INDEX(field3) + 1,
+			field3 & TRB_CYCLE ? 'C' : 'c');
+		break;
+	case TRB_STOP_RING:
+		sprintf(str,
+			"%s: slot %d sp %d ep %d flags %c",
+			xhci_trb_type_string(TRB_FIELD_TO_TYPE(field3)),
+			TRB_TO_SLOT_ID(field3),
+			TRB_TO_SUSPEND_PORT(field3),
+			/* Macro decrements 1, maybe it shouldn't?!? */
+			TRB_TO_EP_INDEX(field3) + 1,
+			field3 & TRB_CYCLE ? 'C' : 'c');
+		break;
+	case TRB_SET_DEQ:
+		sprintf(str,
+			"%s: deq %08x%08x stream %d slot %d ep %d flags %c",
+			xhci_trb_type_string(TRB_FIELD_TO_TYPE(field3)),
+			field1, field0,
+			TRB_TO_STREAM_ID(field2),
+			TRB_TO_SLOT_ID(field3),
+			/* Macro decrements 1, maybe it shouldn't?!? */
+			TRB_TO_EP_INDEX(field3) + 1,
+			field3 & TRB_CYCLE ? 'C' : 'c');
+		break;
+	case TRB_RESET_DEV:
+		sprintf(str,
+			"%s: slot %d flags %c",
+			xhci_trb_type_string(TRB_FIELD_TO_TYPE(field3)),
+			TRB_TO_SLOT_ID(field3),
+			field3 & TRB_CYCLE ? 'C' : 'c');
+		break;
+	case TRB_FORCE_EVENT:
+		sprintf(str,
+			"%s: event %08x%08x vf intr %d vf id %d flags %c",
+			xhci_trb_type_string(TRB_FIELD_TO_TYPE(field3)),
+			field1, field0,
+			TRB_TO_VF_INTR_TARGET(field2),
+			TRB_TO_VF_ID(field3),
+			field3 & TRB_CYCLE ? 'C' : 'c');
+		break;
+	case TRB_SET_LT:
+		sprintf(str,
+			"%s: belt %d flags %c",
+			xhci_trb_type_string(TRB_FIELD_TO_TYPE(field3)),
+			TRB_TO_BELT(field3),
+			field3 & TRB_CYCLE ? 'C' : 'c');
+		break;
+	case TRB_GET_BW:
+		sprintf(str,
+			"%s: ctx %08x%08x slot %d speed %d flags %c",
+			xhci_trb_type_string(TRB_FIELD_TO_TYPE(field3)),
+			field1, field0,
+			TRB_TO_SLOT_ID(field3),
+			TRB_TO_DEV_SPEED(field3),
+			field3 & TRB_CYCLE ? 'C' : 'c');
+		break;
+	case TRB_FORCE_HEADER:
+		sprintf(str,
+			"%s: info %08x%08x%08x pkt type %d roothub port %d flags %c",
+			xhci_trb_type_string(TRB_FIELD_TO_TYPE(field3)),
+			field2, field1, field0 & 0xffffffe0,
+			TRB_TO_PACKET_TYPE(field0),
+			TRB_TO_ROOTHUB_PORT(field3),
+			field3 & TRB_CYCLE ? 'C' : 'c');
+		break;
+	default:
+		sprintf(str,
+			"type '%s' -> raw %08x %08x %08x %08x",
+			xhci_trb_type_string(TRB_FIELD_TO_TYPE(field3)),
+			field0, field1, field2, field3);
+	}
+
+	return str;
+}
+
+
 #endif /* __LINUX_XHCI_HCD_H */
diff --git a/drivers/usb/isp1760/isp1760-udc.c b/drivers/usb/isp1760/isp1760-udc.c
index 1c3d0fd658fa..69400f3da886 100644
--- a/drivers/usb/isp1760/isp1760-udc.c
+++ b/drivers/usb/isp1760/isp1760-udc.c
@@ -1250,7 +1250,7 @@ static int isp1760_udc_stop(struct usb_gadget *gadget)
 	return 0;
 }
 
-static struct usb_gadget_ops isp1760_udc_ops = {
+static const struct usb_gadget_ops isp1760_udc_ops = {
 	.get_frame = isp1760_udc_get_frame,
 	.wakeup = isp1760_udc_wakeup,
 	.set_selfpowered = isp1760_udc_set_selfpowered,
diff --git a/drivers/usb/misc/Kconfig b/drivers/usb/misc/Kconfig
index 47b357760afc..1d1d70d62a19 100644
--- a/drivers/usb/misc/Kconfig
+++ b/drivers/usb/misc/Kconfig
@@ -233,6 +233,15 @@ config USB_EZUSB_FX2
 	  Say Y here if you need EZUSB device support.
 	  (Cypress FX/FX2/FX2LP microcontrollers)
 
+config USB_HUB_USB251XB
+	tristate "USB251XB Hub Controller Configuration Driver"
+	depends on I2C
+	help
+	  This option enables support for configuration via SMBus of the
+	  Microchip USB251xB/xBi USB 2.0 Hub Controller series.
+	  Configuration parameters may be set in devicetree or platform data.
+	  Say Y or M here if you need to configure such a device via SMBus.
+
 config USB_HSIC_USB3503
        tristate "USB3503 HSIC to USB20 Driver"
        depends on I2C
diff --git a/drivers/usb/misc/Makefile b/drivers/usb/misc/Makefile
index 3d1992750da4..f6ac6c99a6e6 100644
--- a/drivers/usb/misc/Makefile
+++ b/drivers/usb/misc/Makefile
@@ -23,6 +23,7 @@ obj-$(CONFIG_USB_TRANCEVIBRATOR)	+= trancevibrator.o
 obj-$(CONFIG_USB_USS720)		+= uss720.o
 obj-$(CONFIG_USB_SEVSEG)		+= usbsevseg.o
 obj-$(CONFIG_USB_YUREX)			+= yurex.o
+obj-$(CONFIG_USB_HUB_USB251XB)		+= usb251xb.o
 obj-$(CONFIG_USB_HSIC_USB3503)		+= usb3503.o
 obj-$(CONFIG_USB_HSIC_USB4604)		+= usb4604.o
 obj-$(CONFIG_USB_CHAOSKEY)		+= chaoskey.o
diff --git a/drivers/usb/misc/adutux.c b/drivers/usb/misc/adutux.c
index 564268fca07a..a540e4f206c4 100644
--- a/drivers/usb/misc/adutux.c
+++ b/drivers/usb/misc/adutux.c
@@ -389,10 +389,6 @@ static ssize_t adu_read(struct file *file, __user char *buffer, size_t count,
 			dev->secondary_head += (amount - i);
 			bytes_read += (amount - i);
 			bytes_to_read -= (amount - i);
-			if (i) {
-				retval = bytes_read ? bytes_read : -EFAULT;
-				goto exit;
-			}
 		} else {
 			/* we check the primary buffer */
 			spin_lock_irqsave (&dev->buflock, flags);
diff --git a/drivers/usb/misc/sisusbvga/sisusb.c b/drivers/usb/misc/sisusbvga/sisusb.c
index 05bd39d62568..440d7fef58cc 100644
--- a/drivers/usb/misc/sisusbvga/sisusb.c
+++ b/drivers/usb/misc/sisusbvga/sisusb.c
@@ -1831,16 +1831,10 @@ static int sisusb_set_default_mode(struct sisusb_usb_data *sisusb,
 	SETIREGANDOR(SISCR, 0x09, 0x5f, ((crtcdata[16] & 0x01) << 5));
 	SETIREG(SISCR, 0x14, 0x4f);
 	du = (modex / 16) * (bpp * 2);	/* offset/pitch */
-	if (modex % 16)
-		du += bpp;
-
 	SETIREGANDOR(SISSR, 0x0e, 0xf0, ((du >> 8) & 0x0f));
 	SETIREG(SISCR, 0x13, (du & 0xff));
 	du <<= 5;
 	tmp8 = du >> 8;
-	if (du & 0xff)
-		tmp8++;
-
 	SETIREG(SISSR, 0x10, tmp8);
 	SETIREG(SISSR, 0x31, 0x00);	/* VCLK */
 	SETIREG(SISSR, 0x2b, 0x1b);
diff --git a/drivers/usb/misc/usb251xb.c b/drivers/usb/misc/usb251xb.c
new file mode 100644
index 000000000000..4e18600dc9b4
--- /dev/null
+++ b/drivers/usb/misc/usb251xb.c
@@ -0,0 +1,605 @@
+/*
+ * Driver for Microchip USB251xB USB 2.0 Hi-Speed Hub Controller
+ * Configuration via SMBus.
+ *
+ * Copyright (c) 2017 SKIDATA AG
+ *
+ * This work is based on the USB3503 driver by Dongjin Kim and
+ * a not-accepted patch by Fabien Lahoudere, see:
+ * https://patchwork.kernel.org/patch/9257715/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/delay.h>
+#include <linux/gpio.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/nls.h>
+#include <linux/of_device.h>
+#include <linux/of_gpio.h>
+#include <linux/slab.h>
+
+/* Internal Register Set Addresses & Default Values acc. to DS00001692C */
+#define USB251XB_ADDR_VENDOR_ID_LSB	0x00
+#define USB251XB_ADDR_VENDOR_ID_MSB	0x01
+#define USB251XB_DEF_VENDOR_ID		0x0424
+
+#define USB251XB_ADDR_PRODUCT_ID_LSB	0x02
+#define USB251XB_ADDR_PRODUCT_ID_MSB	0x03
+#define USB251XB_DEF_PRODUCT_ID_12	0x2512 /* USB2512B/12Bi */
+#define USB251XB_DEF_PRODUCT_ID_13	0x2513 /* USB2513B/13Bi */
+#define USB251XB_DEF_PRODUCT_ID_14	0x2514 /* USB2514B/14Bi */
+
+#define USB251XB_ADDR_DEVICE_ID_LSB	0x04
+#define USB251XB_ADDR_DEVICE_ID_MSB	0x05
+#define USB251XB_DEF_DEVICE_ID		0x0BB3
+
+#define USB251XB_ADDR_CONFIG_DATA_1	0x06
+#define USB251XB_DEF_CONFIG_DATA_1	0x9B
+#define USB251XB_ADDR_CONFIG_DATA_2	0x07
+#define USB251XB_DEF_CONFIG_DATA_2	0x20
+#define USB251XB_ADDR_CONFIG_DATA_3	0x08
+#define USB251XB_DEF_CONFIG_DATA_3	0x02
+
+#define USB251XB_ADDR_NON_REMOVABLE_DEVICES	0x09
+#define USB251XB_DEF_NON_REMOVABLE_DEVICES	0x00
+
+#define USB251XB_ADDR_PORT_DISABLE_SELF	0x0A
+#define USB251XB_DEF_PORT_DISABLE_SELF	0x00
+#define USB251XB_ADDR_PORT_DISABLE_BUS	0x0B
+#define USB251XB_DEF_PORT_DISABLE_BUS	0x00
+
+#define USB251XB_ADDR_MAX_POWER_SELF	0x0C
+#define USB251XB_DEF_MAX_POWER_SELF	0x01
+#define USB251XB_ADDR_MAX_POWER_BUS	0x0D
+#define USB251XB_DEF_MAX_POWER_BUS	0x32
+
+#define USB251XB_ADDR_MAX_CURRENT_SELF	0x0E
+#define USB251XB_DEF_MAX_CURRENT_SELF	0x01
+#define USB251XB_ADDR_MAX_CURRENT_BUS	0x0F
+#define USB251XB_DEF_MAX_CURRENT_BUS	0x32
+
+#define USB251XB_ADDR_POWER_ON_TIME	0x10
+#define USB251XB_DEF_POWER_ON_TIME	0x32
+
+#define USB251XB_ADDR_LANGUAGE_ID_HIGH	0x11
+#define USB251XB_ADDR_LANGUAGE_ID_LOW	0x12
+#define USB251XB_DEF_LANGUAGE_ID	0x0000
+
+#define USB251XB_STRING_BUFSIZE			62
+#define USB251XB_ADDR_MANUFACTURER_STRING_LEN	0x13
+#define USB251XB_ADDR_MANUFACTURER_STRING	0x16
+#define USB251XB_DEF_MANUFACTURER_STRING	"Microchip"
+
+#define USB251XB_ADDR_PRODUCT_STRING_LEN	0x14
+#define USB251XB_ADDR_PRODUCT_STRING		0x54
+#define USB251XB_DEF_PRODUCT_STRING		"USB251xB/xBi"
+
+#define USB251XB_ADDR_SERIAL_STRING_LEN		0x15
+#define USB251XB_ADDR_SERIAL_STRING		0x92
+#define USB251XB_DEF_SERIAL_STRING		""
+
+#define USB251XB_ADDR_BATTERY_CHARGING_ENABLE	0xD0
+#define USB251XB_DEF_BATTERY_CHARGING_ENABLE	0x00
+
+#define USB251XB_ADDR_BOOST_UP	0xF6
+#define USB251XB_DEF_BOOST_UP	0x00
+#define USB251XB_ADDR_BOOST_X	0xF8
+#define USB251XB_DEF_BOOST_X	0x00
+
+#define USB251XB_ADDR_PORT_SWAP	0xFA
+#define USB251XB_DEF_PORT_SWAP	0x00
+
+#define USB251XB_ADDR_PORT_MAP_12	0xFB
+#define USB251XB_DEF_PORT_MAP_12	0x00
+#define USB251XB_ADDR_PORT_MAP_34	0xFC
+#define USB251XB_DEF_PORT_MAP_34	0x00 /* USB2513B/i & USB2514B/i only */
+
+#define USB251XB_ADDR_STATUS_COMMAND		0xFF
+#define USB251XB_STATUS_COMMAND_SMBUS_DOWN	0x04
+#define USB251XB_STATUS_COMMAND_RESET		0x02
+#define USB251XB_STATUS_COMMAND_ATTACH		0x01
+
+#define USB251XB_I2C_REG_SZ	0x100
+#define USB251XB_I2C_WRITE_SZ	0x10
+
+#define DRIVER_NAME	"usb251xb"
+#define DRIVER_DESC	"Microchip USB 2.0 Hi-Speed Hub Controller"
+#define DRIVER_VERSION	"1.0"
+
+struct usb251xb {
+	struct device *dev;
+	struct i2c_client *i2c;
+	u8 skip_config;
+	int gpio_reset;
+	u16 vendor_id;
+	u16 product_id;
+	u16 device_id;
+	u8  conf_data1;
+	u8  conf_data2;
+	u8  conf_data3;
+	u8  non_rem_dev;
+	u8  port_disable_sp;
+	u8  port_disable_bp;
+	u8  max_power_sp;
+	u8  max_power_bp;
+	u8  max_current_sp;
+	u8  max_current_bp;
+	u8  power_on_time;
+	u16 lang_id;
+	u8 manufacturer_len;
+	u8 product_len;
+	u8 serial_len;
+	char manufacturer[USB251XB_STRING_BUFSIZE];
+	char product[USB251XB_STRING_BUFSIZE];
+	char serial[USB251XB_STRING_BUFSIZE];
+	u8  bat_charge_en;
+	u8  boost_up;
+	u8  boost_x;
+	u8  port_swap;
+	u8  port_map12;
+	u8  port_map34;
+	u8  status;
+};
+
+struct usb251xb_data {
+	u16 product_id;
+	char product_str[USB251XB_STRING_BUFSIZE / 2]; /* ASCII string */
+};
+
+static const struct usb251xb_data usb2512b_data = {
+	.product_id = 0x2512,
+	.product_str = "USB2512B",
+};
+
+static const struct usb251xb_data usb2512bi_data = {
+	.product_id = 0x2512,
+	.product_str = "USB2512Bi",
+};
+
+static const struct usb251xb_data usb2513b_data = {
+	.product_id = 0x2513,
+	.product_str = "USB2513B",
+};
+
+static const struct usb251xb_data usb2513bi_data = {
+	.product_id = 0x2513,
+	.product_str = "USB2513Bi",
+};
+
+static const struct usb251xb_data usb2514b_data = {
+	.product_id = 0x2514,
+	.product_str = "USB2514B",
+};
+
+static const struct usb251xb_data usb2514bi_data = {
+	.product_id = 0x2514,
+	.product_str = "USB2514Bi",
+};
+
+static void usb251xb_reset(struct usb251xb *hub, int state)
+{
+	if (!gpio_is_valid(hub->gpio_reset))
+		return;
+
+	gpio_set_value_cansleep(hub->gpio_reset, state);
+
+	/* wait for hub recovery/stabilization */
+	if (state)
+		usleep_range(500, 750);	/* >=500us at power on */
+	else
+		usleep_range(1, 10);	/* >=1us at power down */
+}
+
+static int usb251xb_connect(struct usb251xb *hub)
+{
+	struct device *dev = hub->dev;
+	int err, i;
+	char i2c_wb[USB251XB_I2C_REG_SZ];
+
+	memset(i2c_wb, 0, USB251XB_I2C_REG_SZ);
+
+	if (hub->skip_config) {
+		dev_info(dev, "Skip hub configuration, only attach.\n");
+		i2c_wb[0] = 0x01;
+		i2c_wb[1] = USB251XB_STATUS_COMMAND_ATTACH;
+
+		usb251xb_reset(hub, 1);
+
+		err = i2c_smbus_write_i2c_block_data(hub->i2c,
+				USB251XB_ADDR_STATUS_COMMAND, 2, i2c_wb);
+		if (err) {
+			dev_err(dev, "attaching hub failed: %d\n", err);
+			return err;
+		}
+		return 0;
+	}
+
+	i2c_wb[USB251XB_ADDR_VENDOR_ID_MSB]     = (hub->vendor_id >> 8) & 0xFF;
+	i2c_wb[USB251XB_ADDR_VENDOR_ID_LSB]     = hub->vendor_id & 0xFF;
+	i2c_wb[USB251XB_ADDR_PRODUCT_ID_MSB]    = (hub->product_id >> 8) & 0xFF;
+	i2c_wb[USB251XB_ADDR_PRODUCT_ID_LSB]    = hub->product_id & 0xFF;
+	i2c_wb[USB251XB_ADDR_DEVICE_ID_MSB]     = (hub->device_id >> 8) & 0xFF;
+	i2c_wb[USB251XB_ADDR_DEVICE_ID_LSB]     = hub->device_id & 0xFF;
+	i2c_wb[USB251XB_ADDR_CONFIG_DATA_1]     = hub->conf_data1;
+	i2c_wb[USB251XB_ADDR_CONFIG_DATA_2]     = hub->conf_data2;
+	i2c_wb[USB251XB_ADDR_CONFIG_DATA_3]     = hub->conf_data3;
+	i2c_wb[USB251XB_ADDR_NON_REMOVABLE_DEVICES] = hub->non_rem_dev;
+	i2c_wb[USB251XB_ADDR_PORT_DISABLE_SELF] = hub->port_disable_sp;
+	i2c_wb[USB251XB_ADDR_PORT_DISABLE_BUS]  = hub->port_disable_bp;
+	i2c_wb[USB251XB_ADDR_MAX_POWER_SELF]    = hub->max_power_sp;
+	i2c_wb[USB251XB_ADDR_MAX_POWER_BUS]     = hub->max_power_bp;
+	i2c_wb[USB251XB_ADDR_MAX_CURRENT_SELF]  = hub->max_current_sp;
+	i2c_wb[USB251XB_ADDR_MAX_CURRENT_BUS]   = hub->max_current_bp;
+	i2c_wb[USB251XB_ADDR_POWER_ON_TIME]     = hub->power_on_time;
+	i2c_wb[USB251XB_ADDR_LANGUAGE_ID_HIGH]  = (hub->lang_id >> 8) & 0xFF;
+	i2c_wb[USB251XB_ADDR_LANGUAGE_ID_LOW]   = hub->lang_id & 0xFF;
+	i2c_wb[USB251XB_ADDR_MANUFACTURER_STRING_LEN] = hub->manufacturer_len;
+	i2c_wb[USB251XB_ADDR_PRODUCT_STRING_LEN]      = hub->product_len;
+	i2c_wb[USB251XB_ADDR_SERIAL_STRING_LEN]       = hub->serial_len;
+	memcpy(&i2c_wb[USB251XB_ADDR_MANUFACTURER_STRING], hub->manufacturer,
+	       USB251XB_STRING_BUFSIZE);
+	memcpy(&i2c_wb[USB251XB_ADDR_SERIAL_STRING], hub->serial,
+	       USB251XB_STRING_BUFSIZE);
+	memcpy(&i2c_wb[USB251XB_ADDR_PRODUCT_STRING], hub->product,
+	       USB251XB_STRING_BUFSIZE);
+	i2c_wb[USB251XB_ADDR_BATTERY_CHARGING_ENABLE] = hub->bat_charge_en;
+	i2c_wb[USB251XB_ADDR_BOOST_UP]          = hub->boost_up;
+	i2c_wb[USB251XB_ADDR_BOOST_X]           = hub->boost_x;
+	i2c_wb[USB251XB_ADDR_PORT_SWAP]         = hub->port_swap;
+	i2c_wb[USB251XB_ADDR_PORT_MAP_12]       = hub->port_map12;
+	i2c_wb[USB251XB_ADDR_PORT_MAP_34]       = hub->port_map34;
+	i2c_wb[USB251XB_ADDR_STATUS_COMMAND] = USB251XB_STATUS_COMMAND_ATTACH;
+
+	usb251xb_reset(hub, 1);
+
+	/* write registers */
+	for (i = 0; i < (USB251XB_I2C_REG_SZ / USB251XB_I2C_WRITE_SZ); i++) {
+		int offset = i * USB251XB_I2C_WRITE_SZ;
+		char wbuf[USB251XB_I2C_WRITE_SZ + 1];
+
+		/* The first data byte transferred tells the hub how many data
+		 * bytes will follow (byte count).
+		 */
+		wbuf[0] = USB251XB_I2C_WRITE_SZ;
+		memcpy(&wbuf[1], &i2c_wb[offset], USB251XB_I2C_WRITE_SZ);
+
+		dev_dbg(dev, "writing %d byte block %d to 0x%02X\n",
+			USB251XB_I2C_WRITE_SZ, i, offset);
+
+		err = i2c_smbus_write_i2c_block_data(hub->i2c, offset,
+						     USB251XB_I2C_WRITE_SZ + 1,
+						     wbuf);
+		if (err)
+			goto out_err;
+	}
+
+	dev_info(dev, "Hub configuration was successful.\n");
+	return 0;
+
+out_err:
+	dev_err(dev, "configuring block %d failed: %d\n", i, err);
+	return err;
+}
+
+#ifdef CONFIG_OF
+static int usb251xb_get_ofdata(struct usb251xb *hub,
+			       struct usb251xb_data *data)
+{
+	struct device *dev = hub->dev;
+	struct device_node *np = dev->of_node;
+	int len, err, i;
+	u32 *property_u32 = NULL;
+	const u32 *cproperty_u32;
+	const char *cproperty_char;
+	char str[USB251XB_STRING_BUFSIZE / 2];
+
+	if (!np) {
+		dev_err(dev, "failed to get ofdata\n");
+		return -ENODEV;
+	}
+
+	if (of_get_property(np, "skip-config", NULL))
+		hub->skip_config = 1;
+	else
+		hub->skip_config = 0;
+
+	hub->gpio_reset = of_get_named_gpio(np, "reset-gpios", 0);
+	if (hub->gpio_reset == -EPROBE_DEFER)
+		return -EPROBE_DEFER;
+	if (gpio_is_valid(hub->gpio_reset)) {
+		err = devm_gpio_request_one(dev, hub->gpio_reset,
+					    GPIOF_OUT_INIT_LOW,
+					    "usb251xb reset");
+		if (err) {
+			dev_err(dev,
+				"unable to request GPIO %d as reset pin (%d)\n",
+				hub->gpio_reset, err);
+			return err;
+		}
+	}
+
+	if (of_property_read_u16_array(np, "vendor-id", &hub->vendor_id, 1))
+		hub->vendor_id = USB251XB_DEF_VENDOR_ID;
+
+	if (of_property_read_u16_array(np, "product-id",
+				       &hub->product_id, 1))
+		hub->product_id = data->product_id;
+
+	if (of_property_read_u16_array(np, "device-id", &hub->device_id, 1))
+		hub->device_id = USB251XB_DEF_DEVICE_ID;
+
+	hub->conf_data1 = USB251XB_DEF_CONFIG_DATA_1;
+	if (of_get_property(np, "self-powered", NULL)) {
+		hub->conf_data1 |= BIT(7);
+
+		/* Configure Over-Current sens when self-powered */
+		hub->conf_data1 &= ~BIT(2);
+		if (of_get_property(np, "ganged-sensing", NULL))
+			hub->conf_data1 &= ~BIT(1);
+		else if (of_get_property(np, "individual-sensing", NULL))
+			hub->conf_data1 |= BIT(1);
+	} else if (of_get_property(np, "bus-powered", NULL)) {
+		hub->conf_data1 &= ~BIT(7);
+
+		/* Disable Over-Current sense when bus-powered */
+		hub->conf_data1 |= BIT(2);
+	}
+
+	if (of_get_property(np, "disable-hi-speed", NULL))
+		hub->conf_data1 |= BIT(5);
+
+	if (of_get_property(np, "multi-tt", NULL))
+		hub->conf_data1 |= BIT(4);
+	else if (of_get_property(np, "single-tt", NULL))
+		hub->conf_data1 &= ~BIT(4);
+
+	if (of_get_property(np, "disable-eop", NULL))
+		hub->conf_data1 |= BIT(3);
+
+	if (of_get_property(np, "individual-port-switching", NULL))
+		hub->conf_data1 |= BIT(0);
+	else if (of_get_property(np, "ganged-port-switching", NULL))
+		hub->conf_data1 &= ~BIT(0);
+
+	hub->conf_data2 = USB251XB_DEF_CONFIG_DATA_2;
+	if (of_get_property(np, "dynamic-power-switching", NULL))
+		hub->conf_data2 |= BIT(7);
+
+	if (of_get_property(np, "oc-delay-100us", NULL)) {
+		hub->conf_data2 &= ~BIT(5);
+		hub->conf_data2 &= ~BIT(4);
+	} else if (of_get_property(np, "oc-delay-4ms", NULL)) {
+		hub->conf_data2 &= ~BIT(5);
+		hub->conf_data2 |= BIT(4);
+	} else if (of_get_property(np, "oc-delay-8ms", NULL)) {
+		hub->conf_data2 |= BIT(5);
+		hub->conf_data2 &= ~BIT(4);
+	} else if (of_get_property(np, "oc-delay-16ms", NULL)) {
+		hub->conf_data2 |= BIT(5);
+		hub->conf_data2 |= BIT(4);
+	}
+
+	if (of_get_property(np, "compound-device", NULL))
+		hub->conf_data2 |= BIT(3);
+
+	hub->conf_data3 = USB251XB_DEF_CONFIG_DATA_3;
+	if (of_get_property(np, "port-mapping-mode", NULL))
+		hub->conf_data3 |= BIT(3);
+
+	if (of_get_property(np, "string-support", NULL))
+		hub->conf_data3 |= BIT(0);
+
+	hub->non_rem_dev = USB251XB_DEF_NON_REMOVABLE_DEVICES;
+	cproperty_u32 = of_get_property(np, "non-removable-ports", &len);
+	if (cproperty_u32 && (len / sizeof(u32)) > 0) {
+		for (i = 0; i < len / sizeof(u32); i++) {
+			u32 port = be32_to_cpu(cproperty_u32[i]);
+
+			if ((port >= 1) && (port <= 4))
+				hub->non_rem_dev |= BIT(port);
+		}
+	}
+
+	hub->port_disable_sp = USB251XB_DEF_PORT_DISABLE_SELF;
+	cproperty_u32 = of_get_property(np, "sp-disabled-ports", &len);
+	if (cproperty_u32 && (len / sizeof(u32)) > 0) {
+		for (i = 0; i < len / sizeof(u32); i++) {
+			u32 port = be32_to_cpu(cproperty_u32[i]);
+
+			if ((port >= 1) && (port <= 4))
+				hub->port_disable_sp |= BIT(port);
+		}
+	}
+
+	hub->port_disable_bp = USB251XB_DEF_PORT_DISABLE_BUS;
+	cproperty_u32 = of_get_property(np, "bp-disabled-ports", &len);
+	if (cproperty_u32 && (len / sizeof(u32)) > 0) {
+		for (i = 0; i < len / sizeof(u32); i++) {
+			u32 port = be32_to_cpu(cproperty_u32[i]);
+
+			if ((port >= 1) && (port <= 4))
+				hub->port_disable_bp |= BIT(port);
+		}
+	}
+
+	hub->max_power_sp = USB251XB_DEF_MAX_POWER_SELF;
+	if (!of_property_read_u32(np, "max-sp-power", property_u32))
+		hub->max_power_sp = min_t(u8, be32_to_cpu(*property_u32) / 2,
+					  250);
+
+	hub->max_power_bp = USB251XB_DEF_MAX_POWER_BUS;
+	if (!of_property_read_u32(np, "max-bp-power", property_u32))
+		hub->max_power_bp = min_t(u8, be32_to_cpu(*property_u32) / 2,
+					  250);
+
+	hub->max_current_sp = USB251XB_DEF_MAX_CURRENT_SELF;
+	if (!of_property_read_u32(np, "max-sp-current", property_u32))
+		hub->max_current_sp = min_t(u8, be32_to_cpu(*property_u32) / 2,
+					    250);
+
+	hub->max_current_bp = USB251XB_DEF_MAX_CURRENT_BUS;
+	if (!of_property_read_u32(np, "max-bp-current", property_u32))
+		hub->max_current_bp = min_t(u8, be32_to_cpu(*property_u32) / 2,
+					    250);
+
+	hub->power_on_time = USB251XB_DEF_POWER_ON_TIME;
+	if (!of_property_read_u32(np, "power-on-time", property_u32))
+		hub->power_on_time = min_t(u8, be32_to_cpu(*property_u32) / 2,
+					   255);
+
+	if (of_property_read_u16_array(np, "language-id", &hub->lang_id, 1))
+		hub->lang_id = USB251XB_DEF_LANGUAGE_ID;
+
+	cproperty_char = of_get_property(np, "manufacturer", NULL);
+	strlcpy(str, cproperty_char ? : USB251XB_DEF_MANUFACTURER_STRING,
+		sizeof(str));
+	hub->manufacturer_len = strlen(str) & 0xFF;
+	memset(hub->manufacturer, 0, USB251XB_STRING_BUFSIZE);
+	len = min_t(size_t, USB251XB_STRING_BUFSIZE / 2, strlen(str));
+	len = utf8s_to_utf16s(str, len, UTF16_LITTLE_ENDIAN,
+			      (wchar_t *)hub->manufacturer,
+			      USB251XB_STRING_BUFSIZE);
+
+	cproperty_char = of_get_property(np, "product", NULL);
+	strlcpy(str, cproperty_char ? : data->product_str, sizeof(str));
+	hub->product_len = strlen(str) & 0xFF;
+	memset(hub->product, 0, USB251XB_STRING_BUFSIZE);
+	len = min_t(size_t, USB251XB_STRING_BUFSIZE / 2, strlen(str));
+	len = utf8s_to_utf16s(str, len, UTF16_LITTLE_ENDIAN,
+			      (wchar_t *)hub->product,
+			      USB251XB_STRING_BUFSIZE);
+
+	cproperty_char = of_get_property(np, "serial", NULL);
+	strlcpy(str, cproperty_char ? : USB251XB_DEF_SERIAL_STRING,
+		sizeof(str));
+	hub->serial_len = strlen(str) & 0xFF;
+	memset(hub->serial, 0, USB251XB_STRING_BUFSIZE);
+	len = min_t(size_t, USB251XB_STRING_BUFSIZE / 2, strlen(str));
+	len = utf8s_to_utf16s(str, len, UTF16_LITTLE_ENDIAN,
+			      (wchar_t *)hub->serial,
+			      USB251XB_STRING_BUFSIZE);
+
+	/* The following parameters are currently not exposed to devicetree, but
+	 * may be as soon as needed.
+	 */
+	hub->bat_charge_en = USB251XB_DEF_BATTERY_CHARGING_ENABLE;
+	hub->boost_up = USB251XB_DEF_BOOST_UP;
+	hub->boost_x = USB251XB_DEF_BOOST_X;
+	hub->port_swap = USB251XB_DEF_PORT_SWAP;
+	hub->port_map12 = USB251XB_DEF_PORT_MAP_12;
+	hub->port_map34 = USB251XB_DEF_PORT_MAP_34;
+
+	return 0;
+}
+
+static const struct of_device_id usb251xb_of_match[] = {
+	{
+		.compatible = "microchip,usb2512b",
+		.data = &usb2512b_data,
+	}, {
+		.compatible = "microchip,usb2512bi",
+		.data = &usb2512bi_data,
+	}, {
+		.compatible = "microchip,usb2513b",
+		.data = &usb2513b_data,
+	}, {
+		.compatible = "microchip,usb2513bi",
+		.data = &usb2513bi_data,
+	}, {
+		.compatible = "microchip,usb2514b",
+		.data = &usb2514b_data,
+	}, {
+		.compatible = "microchip,usb2514bi",
+		.data = &usb2514bi_data,
+	}, {
+		/* sentinel */
+	}
+};
+MODULE_DEVICE_TABLE(of, usb251xb_of_match);
+#else /* CONFIG_OF */
+static int usb251xb_get_ofdata(struct usb251xb *hub,
+			       struct usb251xb_data *data)
+{
+	return 0;
+}
+#endif /* CONFIG_OF */
+
+static int usb251xb_probe(struct usb251xb *hub)
+{
+	struct device *dev = hub->dev;
+	struct device_node *np = dev->of_node;
+	const struct of_device_id *of_id = of_match_device(usb251xb_of_match,
+							   dev);
+	int err;
+
+	if (np) {
+		err = usb251xb_get_ofdata(hub,
+					  (struct usb251xb_data *)of_id->data);
+		if (err) {
+			dev_err(dev, "failed to get ofdata: %d\n", err);
+			return err;
+		}
+	}
+
+	err = usb251xb_connect(hub);
+	if (err) {
+		dev_err(dev, "Failed to connect hub (%d)\n", err);
+		return err;
+	}
+
+	dev_info(dev, "Hub probed successfully\n");
+
+	return 0;
+}
+
+static int usb251xb_i2c_probe(struct i2c_client *i2c,
+			      const struct i2c_device_id *id)
+{
+	struct usb251xb *hub;
+
+	hub = devm_kzalloc(&i2c->dev, sizeof(struct usb251xb), GFP_KERNEL);
+	if (!hub)
+		return -ENOMEM;
+
+	i2c_set_clientdata(i2c, hub);
+	hub->dev = &i2c->dev;
+	hub->i2c = i2c;
+
+	return usb251xb_probe(hub);
+}
+
+static const struct i2c_device_id usb251xb_id[] = {
+	{ "usb2512b", 0 },
+	{ "usb2512bi", 0 },
+	{ "usb2513b", 0 },
+	{ "usb2513bi", 0 },
+	{ "usb2514b", 0 },
+	{ "usb2514bi", 0 },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(i2c, usb251xb_id);
+
+static struct i2c_driver usb251xb_i2c_driver = {
+	.driver = {
+		.name = DRIVER_NAME,
+		.of_match_table = of_match_ptr(usb251xb_of_match),
+	},
+	.probe    = usb251xb_i2c_probe,
+	.id_table = usb251xb_id,
+};
+
+module_i2c_driver(usb251xb_i2c_driver);
+
+MODULE_AUTHOR("Richard Leitner <richard.leitner@skidata.com>");
+MODULE_DESCRIPTION("USB251xB/xBi USB 2.0 Hub Controller Driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/usb/misc/usbtest.c b/drivers/usb/misc/usbtest.c
index 3525626bf086..17c081068257 100644
--- a/drivers/usb/misc/usbtest.c
+++ b/drivers/usb/misc/usbtest.c
@@ -992,7 +992,7 @@ static int ch9_postconfig(struct usbtest_dev *dev)
 				dev_err(&iface->dev,
 						"hs dev qualifier --> %d\n",
 						retval);
-				return (retval < 0) ? retval : -EDOM;
+				return retval;
 			}
 			/* usb2.0 but not high-speed capable; fine */
 		} else if (retval != sizeof(struct usb_qualifier_descriptor)) {
diff --git a/drivers/usb/mtu3/mtu3.h b/drivers/usb/mtu3/mtu3.h
index ba9df719f363..aa6fd6a51221 100644
--- a/drivers/usb/mtu3/mtu3.h
+++ b/drivers/usb/mtu3/mtu3.h
@@ -225,6 +225,7 @@ struct ssusb_mtk {
 	/* common power & clock */
 	struct regulator *vusb33;
 	struct clk *sys_clk;
+	struct clk *ref_clk;
 	/* otg */
 	struct otg_switch_mtk otg_switch;
 	enum usb_dr_mode dr_mode;
diff --git a/drivers/usb/mtu3/mtu3_plat.c b/drivers/usb/mtu3/mtu3_plat.c
index 783367805c99..42550c7db3e7 100644
--- a/drivers/usb/mtu3/mtu3_plat.c
+++ b/drivers/usb/mtu3/mtu3_plat.c
@@ -123,7 +123,13 @@ static int ssusb_rscs_init(struct ssusb_mtk *ssusb)
 	ret = clk_prepare_enable(ssusb->sys_clk);
 	if (ret) {
 		dev_err(ssusb->dev, "failed to enable sys_clk\n");
-		goto clk_err;
+		goto sys_clk_err;
+	}
+
+	ret = clk_prepare_enable(ssusb->ref_clk);
+	if (ret) {
+		dev_err(ssusb->dev, "failed to enable ref_clk\n");
+		goto ref_clk_err;
 	}
 
 	ret = ssusb_phy_init(ssusb);
@@ -143,8 +149,10 @@ static int ssusb_rscs_init(struct ssusb_mtk *ssusb)
 phy_err:
 	ssusb_phy_exit(ssusb);
 phy_init_err:
+	clk_disable_unprepare(ssusb->ref_clk);
+ref_clk_err:
 	clk_disable_unprepare(ssusb->sys_clk);
-clk_err:
+sys_clk_err:
 	regulator_disable(ssusb->vusb33);
 vusb33_err:
 
@@ -154,6 +162,7 @@ vusb33_err:
 static void ssusb_rscs_exit(struct ssusb_mtk *ssusb)
 {
 	clk_disable_unprepare(ssusb->sys_clk);
+	clk_disable_unprepare(ssusb->ref_clk);
 	regulator_disable(ssusb->vusb33);
 	ssusb_phy_power_off(ssusb);
 	ssusb_phy_exit(ssusb);
@@ -204,6 +213,31 @@ static int get_ssusb_rscs(struct platform_device *pdev, struct ssusb_mtk *ssusb)
 	int i;
 	int ret;
 
+	ssusb->vusb33 = devm_regulator_get(&pdev->dev, "vusb33");
+	if (IS_ERR(ssusb->vusb33)) {
+		dev_err(dev, "failed to get vusb33\n");
+		return PTR_ERR(ssusb->vusb33);
+	}
+
+	ssusb->sys_clk = devm_clk_get(dev, "sys_ck");
+	if (IS_ERR(ssusb->sys_clk)) {
+		dev_err(dev, "failed to get sys clock\n");
+		return PTR_ERR(ssusb->sys_clk);
+	}
+
+	/*
+	 * reference clock is usually a "fixed-clock", make it optional
+	 * for backward compatibility and ignore the error if it does
+	 * not exist.
+	 */
+	ssusb->ref_clk = devm_clk_get(dev, "ref_ck");
+	if (IS_ERR(ssusb->ref_clk)) {
+		if (PTR_ERR(ssusb->ref_clk) == -EPROBE_DEFER)
+			return -EPROBE_DEFER;
+
+		ssusb->ref_clk = NULL;
+	}
+
 	ssusb->num_phys = of_count_phandle_with_args(node,
 			"phys", "#phy-cells");
 	if (ssusb->num_phys > 0) {
@@ -225,22 +259,8 @@ static int get_ssusb_rscs(struct platform_device *pdev, struct ssusb_mtk *ssusb)
 
 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ippc");
 	ssusb->ippc_base = devm_ioremap_resource(dev, res);
-	if (IS_ERR(ssusb->ippc_base)) {
-		dev_err(dev, "failed to map memory for ippc\n");
+	if (IS_ERR(ssusb->ippc_base))
 		return PTR_ERR(ssusb->ippc_base);
-	}
-
-	ssusb->vusb33 = devm_regulator_get(&pdev->dev, "vusb33");
-	if (IS_ERR(ssusb->vusb33)) {
-		dev_err(dev, "failed to get vusb33\n");
-		return PTR_ERR(ssusb->vusb33);
-	}
-
-	ssusb->sys_clk = devm_clk_get(dev, "sys_ck");
-	if (IS_ERR(ssusb->sys_clk)) {
-		dev_err(dev, "failed to get sys clock\n");
-		return PTR_ERR(ssusb->sys_clk);
-	}
 
 	ssusb->dr_mode = usb_get_dr_mode(dev);
 	if (ssusb->dr_mode == USB_DR_MODE_UNKNOWN) {
@@ -428,6 +448,7 @@ static int __maybe_unused mtu3_suspend(struct device *dev)
 	ssusb_host_disable(ssusb, true);
 	ssusb_phy_power_off(ssusb);
 	clk_disable_unprepare(ssusb->sys_clk);
+	clk_disable_unprepare(ssusb->ref_clk);
 	ssusb_wakeup_enable(ssusb);
 
 	return 0;
@@ -445,6 +466,7 @@ static int __maybe_unused mtu3_resume(struct device *dev)
 
 	ssusb_wakeup_disable(ssusb);
 	clk_prepare_enable(ssusb->sys_clk);
+	clk_prepare_enable(ssusb->ref_clk);
 	ssusb_phy_power_on(ssusb);
 	ssusb_host_enable(ssusb);
 
diff --git a/drivers/usb/musb/am35x.c b/drivers/usb/musb/am35x.c
index 50ca8052bc8e..02fbb4fe3745 100644
--- a/drivers/usb/musb/am35x.c
+++ b/drivers/usb/musb/am35x.c
@@ -121,7 +121,6 @@ static void am35x_musb_disable(struct musb *musb)
 	musb_writel(reg_base, CORE_INTR_MASK_CLEAR_REG, AM35X_INTR_USB_MASK);
 	musb_writel(reg_base, EP_INTR_MASK_CLEAR_REG,
 			 AM35X_TX_INTR_MASK | AM35X_RX_INTR_MASK);
-	musb_writeb(musb->mregs, MUSB_DEVCTL, 0);
 	musb_writel(reg_base, USB_END_OF_INTR_REG, 0);
 }
 
diff --git a/drivers/usb/musb/blackfin.c b/drivers/usb/musb/blackfin.c
index 896798071817..4418574a36a1 100644
--- a/drivers/usb/musb/blackfin.c
+++ b/drivers/usb/musb/blackfin.c
@@ -581,8 +581,7 @@ static int bfin_remove(struct platform_device *pdev)
 	return 0;
 }
 
-#ifdef CONFIG_PM
-static int bfin_suspend(struct device *dev)
+static int __maybe_unused bfin_suspend(struct device *dev)
 {
 	struct bfin_glue	*glue = dev_get_drvdata(dev);
 	struct musb		*musb = glue_to_musb(glue);
@@ -599,7 +598,7 @@ static int bfin_suspend(struct device *dev)
 	return 0;
 }
 
-static int bfin_resume(struct device *dev)
+static int __maybe_unused bfin_resume(struct device *dev)
 {
 	struct bfin_glue	*glue = dev_get_drvdata(dev);
 	struct musb		*musb = glue_to_musb(glue);
@@ -608,7 +607,6 @@ static int bfin_resume(struct device *dev)
 
 	return 0;
 }
-#endif
 
 static SIMPLE_DEV_PM_OPS(bfin_pm_ops, bfin_suspend, bfin_resume);
 
diff --git a/drivers/usb/musb/cppi_dma.c b/drivers/usb/musb/cppi_dma.c
index 1ae48e64e975..c4fabe952ca6 100644
--- a/drivers/usb/musb/cppi_dma.c
+++ b/drivers/usb/musb/cppi_dma.c
@@ -224,7 +224,7 @@ static void cppi_controller_stop(struct cppi *controller)
 	int			i;
 	struct musb		*musb;
 
-	musb = controller->musb;
+	musb = controller->controller.musb;
 
 	tibase = controller->tibase;
 	/* DISABLE INDIVIDUAL CHANNEL Interrupts */
@@ -288,7 +288,7 @@ cppi_channel_allocate(struct dma_controller *c,
 
 	controller = container_of(c, struct cppi, controller);
 	tibase = controller->tibase;
-	musb = controller->musb;
+	musb = c->musb;
 
 	/* ep0 doesn't use DMA; remember cppi indices are 0..N-1 */
 	index = ep->epnum - 1;
@@ -336,7 +336,7 @@ static void cppi_channel_release(struct dma_channel *channel)
 	c = container_of(channel, struct cppi_channel, channel);
 	tibase = c->controller->tibase;
 	if (!c->hw_ep)
-		musb_dbg(c->controller->musb,
+		musb_dbg(c->controller->controller.musb,
 			"releasing idle DMA channel %p", c);
 	else if (!c->transmit)
 		core_rxirq_enable(tibase, c->index + 1);
@@ -355,7 +355,7 @@ cppi_dump_rx(int level, struct cppi_channel *c, const char *tag)
 
 	musb_ep_select(base, c->index + 1);
 
-	musb_dbg(c->controller->musb,
+	musb_dbg(c->controller->controller.musb,
 		"RX DMA%d%s: %d left, csr %04x, "
 		"%08x H%08x S%08x C%08x, "
 		"B%08x L%08x %08x .. %08x",
@@ -385,7 +385,7 @@ cppi_dump_tx(int level, struct cppi_channel *c, const char *tag)
 
 	musb_ep_select(base, c->index + 1);
 
-	musb_dbg(c->controller->musb,
+	musb_dbg(c->controller->controller.musb,
 		"TX DMA%d%s: csr %04x, "
 		"H%08x S%08x C%08x %08x, "
 		"F%08x L%08x .. %08x",
@@ -954,7 +954,7 @@ static int cppi_channel_program(struct dma_channel *ch,
 
 	cppi_ch = container_of(ch, struct cppi_channel, channel);
 	controller = cppi_ch->controller;
-	musb = controller->musb;
+	musb = controller->controller.musb;
 
 	switch (ch->status) {
 	case MUSB_DMA_STATUS_BUS_ABORT:
@@ -1009,7 +1009,7 @@ static bool cppi_rx_scan(struct cppi *cppi, unsigned ch)
 	int				i;
 	dma_addr_t			safe2ack;
 	void __iomem			*regs = rx->hw_ep->regs;
-	struct musb			*musb = cppi->musb;
+	struct musb			*musb = cppi->controller.musb;
 
 	cppi_dump_rx(6, rx, "/K");
 
@@ -1121,7 +1121,7 @@ static bool cppi_rx_scan(struct cppi *cppi, unsigned ch)
 		 * setting it here "should" be racey, but seems to work
 		 */
 		csr = musb_readw(rx->hw_ep->regs, MUSB_RXCSR);
-		if (is_host_active(cppi->musb)
+		if (is_host_active(cppi->controller.musb)
 				&& bd
 				&& !(csr & MUSB_RXCSR_H_REQPKT)) {
 			csr |= MUSB_RXCSR_H_REQPKT;
@@ -1311,7 +1311,7 @@ cppi_dma_controller_create(struct musb *musb, void __iomem *mregs)
 	controller->mregs = mregs;
 	controller->tibase = mregs - DAVINCI_BASE_OFFSET;
 
-	controller->musb = musb;
+	controller->controller.musb = musb;
 	controller->controller.channel_alloc = cppi_channel_allocate;
 	controller->controller.channel_release = cppi_channel_release;
 	controller->controller.channel_program = cppi_channel_program;
@@ -1323,7 +1323,7 @@ cppi_dma_controller_create(struct musb *musb, void __iomem *mregs)
 
 	/* setup BufferPool */
 	controller->pool = dma_pool_create("cppi",
-			controller->musb->controller,
+			controller->controller.musb->controller,
 			sizeof(struct cppi_descriptor),
 			CPPI_DESCRIPTOR_ALIGN, 0);
 	if (!controller->pool) {
@@ -1357,7 +1357,7 @@ void cppi_dma_controller_destroy(struct dma_controller *c)
 	cppi_controller_stop(cppi);
 
 	if (cppi->irq)
-		free_irq(cppi->irq, cppi->musb);
+		free_irq(cppi->irq, cppi->controller.musb);
 
 	/* assert:  caller stopped the controller first */
 	dma_pool_destroy(cppi->pool);
@@ -1469,7 +1469,7 @@ static int cppi_channel_abort(struct dma_channel *channel)
 		core_rxirq_disable(tibase, cppi_ch->index + 1);
 
 		/* for host, ensure ReqPkt is never set again */
-		if (is_host_active(cppi_ch->controller->musb)) {
+		if (is_host_active(cppi_ch->controller->controller.musb)) {
 			value = musb_readl(tibase, DAVINCI_AUTOREQ_REG);
 			value &= ~((0x3) << (cppi_ch->index * 2));
 			musb_writel(tibase, DAVINCI_AUTOREQ_REG, value);
@@ -1478,7 +1478,7 @@ static int cppi_channel_abort(struct dma_channel *channel)
 		csr = musb_readw(regs, MUSB_RXCSR);
 
 		/* for host, clear (just) ReqPkt at end of current packet(s) */
-		if (is_host_active(cppi_ch->controller->musb)) {
+		if (is_host_active(cppi_ch->controller->controller.musb)) {
 			csr |= MUSB_RXCSR_H_WZC_BITS;
 			csr &= ~MUSB_RXCSR_H_REQPKT;
 		} else
diff --git a/drivers/usb/musb/cppi_dma.h b/drivers/usb/musb/cppi_dma.h
index 7fdfb71a8f09..9bb7c5e45c85 100644
--- a/drivers/usb/musb/cppi_dma.h
+++ b/drivers/usb/musb/cppi_dma.h
@@ -107,7 +107,6 @@ struct cppi_channel {
 /* CPPI DMA controller object */
 struct cppi {
 	struct dma_controller		controller;
-	struct musb			*musb;
 	void __iomem			*mregs;		/* Mentor regs */
 	void __iomem			*tibase;	/* TI/CPPI regs */
 
diff --git a/drivers/usb/musb/da8xx.c b/drivers/usb/musb/da8xx.c
index e89708d839e5..d79c288ccbf2 100644
--- a/drivers/usb/musb/da8xx.c
+++ b/drivers/usb/musb/da8xx.c
@@ -125,7 +125,6 @@ static void da8xx_musb_disable(struct musb *musb)
 	musb_writel(reg_base, DA8XX_USB_INTR_MASK_CLEAR_REG,
 		    DA8XX_INTR_USB_MASK |
 		    DA8XX_INTR_TX_MASK | DA8XX_INTR_RX_MASK);
-	musb_writeb(musb->mregs, MUSB_DEVCTL, 0);
 	musb_writel(reg_base, DA8XX_USB_END_OF_INTR_REG, 0);
 }
 
@@ -458,15 +457,11 @@ static inline u8 get_vbus_power(struct device *dev)
 }
 
 static const struct musb_platform_ops da8xx_ops = {
-	.quirks		= MUSB_DMA_CPPI | MUSB_INDEXED_EP,
+	.quirks		= MUSB_INDEXED_EP | MUSB_PRESERVE_SESSION,
 	.init		= da8xx_musb_init,
 	.exit		= da8xx_musb_exit,
 
 	.fifo_mode	= 2,
-#ifdef CONFIG_USB_TI_CPPI_DMA
-	.dma_init	= cppi_dma_controller_create,
-	.dma_exit	= cppi_dma_controller_destroy,
-#endif
 	.enable		= da8xx_musb_enable,
 	.disable	= da8xx_musb_disable,
 
@@ -578,6 +573,34 @@ static int da8xx_remove(struct platform_device *pdev)
 	return 0;
 }
 
+#ifdef CONFIG_PM_SLEEP
+static int da8xx_suspend(struct device *dev)
+{
+	int ret;
+	struct da8xx_glue *glue = dev_get_drvdata(dev);
+
+	ret = phy_power_off(glue->phy);
+	if (ret)
+		return ret;
+	clk_disable_unprepare(glue->clk);
+
+	return 0;
+}
+
+static int da8xx_resume(struct device *dev)
+{
+	int ret;
+	struct da8xx_glue *glue = dev_get_drvdata(dev);
+
+	ret = clk_prepare_enable(glue->clk);
+	if (ret)
+		return ret;
+	return phy_power_on(glue->phy);
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(da8xx_pm_ops, da8xx_suspend, da8xx_resume);
+
 #ifdef CONFIG_OF
 static const struct of_device_id da8xx_id_table[] = {
 	{
@@ -593,6 +616,7 @@ static struct platform_driver da8xx_driver = {
 	.remove		= da8xx_remove,
 	.driver		= {
 		.name	= "musb-da8xx",
+		.pm = &da8xx_pm_ops,
 		.of_match_table = of_match_ptr(da8xx_id_table),
 	},
 };
diff --git a/drivers/usb/musb/davinci.c b/drivers/usb/musb/davinci.c
index cee61a51645e..52b491d3d5d8 100644
--- a/drivers/usb/musb/davinci.c
+++ b/drivers/usb/musb/davinci.c
@@ -133,7 +133,6 @@ static void davinci_musb_disable(struct musb *musb)
 			  DAVINCI_USB_USBINT_MASK
 			| DAVINCI_USB_TXINT_MASK
 			| DAVINCI_USB_RXINT_MASK);
-	musb_writeb(musb->mregs, MUSB_DEVCTL, 0);
 	musb_writel(musb->ctrl_base, DAVINCI_USB_EOI_REG, 0);
 
 	if (is_dma_capable() && !dma_off)
diff --git a/drivers/usb/musb/jz4740.c b/drivers/usb/musb/jz4740.c
index bc8889956d17..40c68c23d553 100644
--- a/drivers/usb/musb/jz4740.c
+++ b/drivers/usb/musb/jz4740.c
@@ -63,7 +63,7 @@ static struct musb_fifo_cfg jz4740_musb_fifo_cfg[] = {
 { .hw_ep_num = 2, .style = FIFO_TX, .maxpacket = 64, },
 };
 
-static struct musb_hdrc_config jz4740_musb_config = {
+static const struct musb_hdrc_config jz4740_musb_config = {
 	/* Silicon does not implement USB OTG. */
 	.multipoint = 0,
 	/* Max EPs scanned, driver will decide which EP can be used. */
diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
index 772f15821242..d8bae6ca8904 100644
--- a/drivers/usb/musb/musb_core.c
+++ b/drivers/usb/musb/musb_core.c
@@ -1040,16 +1040,6 @@ static void musb_enable_interrupts(struct musb *musb)
 
 }
 
-static void musb_generic_disable(struct musb *musb)
-{
-	void __iomem	*mbase = musb->mregs;
-
-	musb_disable_interrupts(musb);
-
-	/* off */
-	musb_writeb(mbase, MUSB_DEVCTL, 0);
-}
-
 /*
  * Program the HDRC to start (enable interrupts, dma, etc.).
  */
@@ -1106,8 +1096,8 @@ void musb_stop(struct musb *musb)
 {
 	/* stop IRQs, timers, ... */
 	musb_platform_disable(musb);
-	musb_generic_disable(musb);
-	musb_dbg(musb, "HDRC disabled");
+	musb_disable_interrupts(musb);
+	musb_writeb(musb->mregs, MUSB_DEVCTL, 0);
 
 	/* FIXME
 	 *  - mark host and/or peripheral drivers unusable/inactive
@@ -1879,6 +1869,7 @@ static void musb_pm_runtime_check_session(struct musb *musb)
 
 			return;
 		}
+		/* fall through */
 	case MUSB_QUIRK_A_DISCONNECT_19:
 		if (musb->quirk_retries--) {
 			musb_dbg(musb,
@@ -2323,7 +2314,8 @@ musb_init_controller(struct device *dev, int nIrq, void __iomem *ctrl)
 
 	/* be sure interrupts are disabled before connecting ISR */
 	musb_platform_disable(musb);
-	musb_generic_disable(musb);
+	musb_disable_interrupts(musb);
+	musb_writeb(musb->mregs, MUSB_DEVCTL, 0);
 
 	/* Init IRQ workqueue before request_irq */
 	INIT_DELAYED_WORK(&musb->irq_work, musb_irq_work);
@@ -2497,11 +2489,13 @@ static int musb_remove(struct platform_device *pdev)
 	pm_runtime_get_sync(musb->controller);
 	musb_host_cleanup(musb);
 	musb_gadget_cleanup(musb);
+
 	spin_lock_irqsave(&musb->lock, flags);
 	musb_platform_disable(musb);
-	musb_generic_disable(musb);
-	spin_unlock_irqrestore(&musb->lock, flags);
+	musb_disable_interrupts(musb);
 	musb_writeb(musb->mregs, MUSB_DEVCTL, 0);
+	spin_unlock_irqrestore(&musb->lock, flags);
+
 	pm_runtime_dont_use_autosuspend(musb->controller);
 	pm_runtime_put_sync(musb->controller);
 	pm_runtime_disable(musb->controller);
@@ -2676,7 +2670,9 @@ static int musb_suspend(struct device *dev)
 	unsigned long	flags;
 
 	musb_platform_disable(musb);
-	musb_generic_disable(musb);
+	musb_disable_interrupts(musb);
+	if (!(musb->io.quirks & MUSB_PRESERVE_SESSION))
+		musb_writeb(musb->mregs, MUSB_DEVCTL, 0);
 	WARN_ON(!list_empty(&musb->pending_list));
 
 	spin_lock_irqsave(&musb->lock, flags);
diff --git a/drivers/usb/musb/musb_core.h b/drivers/usb/musb/musb_core.h
index ce5a18c98c6d..5b708be6d1d1 100644
--- a/drivers/usb/musb/musb_core.h
+++ b/drivers/usb/musb/musb_core.h
@@ -172,6 +172,7 @@ struct musb_io;
  */
 struct musb_platform_ops {
 
+#define MUSB_PRESERVE_SESSION	BIT(7)
 #define MUSB_DMA_UX500		BIT(6)
 #define MUSB_DMA_CPPI41		BIT(5)
 #define MUSB_DMA_CPPI		BIT(4)
diff --git a/drivers/usb/musb/musb_cppi41.c b/drivers/usb/musb/musb_cppi41.c
index 16363852c034..00e272bfee39 100644
--- a/drivers/usb/musb/musb_cppi41.c
+++ b/drivers/usb/musb/musb_cppi41.c
@@ -30,7 +30,6 @@ struct cppi41_dma_controller {
 	struct dma_controller controller;
 	struct cppi41_dma_channel rx_channel[MUSB_DMA_NUM_CHANNELS];
 	struct cppi41_dma_channel tx_channel[MUSB_DMA_NUM_CHANNELS];
-	struct musb *musb;
 	struct hrtimer early_tx;
 	struct list_head early_tx_list;
 	u32 rx_mode;
@@ -45,7 +44,7 @@ static void save_rx_toggle(struct cppi41_dma_channel *cppi41_channel)
 
 	if (cppi41_channel->is_tx)
 		return;
-	if (!is_host_active(cppi41_channel->controller->musb))
+	if (!is_host_active(cppi41_channel->controller->controller.musb))
 		return;
 
 	csr = musb_readw(cppi41_channel->hw_ep->regs, MUSB_RXCSR);
@@ -78,8 +77,7 @@ static void update_rx_toggle(struct cppi41_dma_channel *cppi41_channel)
 	if (!toggle && toggle == cppi41_channel->usb_toggle) {
 		csr |= MUSB_RXCSR_H_DATATOGGLE | MUSB_RXCSR_H_WR_DATATOGGLE;
 		musb_writew(cppi41_channel->hw_ep->regs, MUSB_RXCSR, csr);
-		musb_dbg(cppi41_channel->controller->musb,
-				"Restoring DATA1 toggle.");
+		musb_dbg(musb, "Restoring DATA1 toggle.");
 	}
 
 	cppi41_channel->usb_toggle = toggle;
@@ -99,7 +97,8 @@ static bool musb_is_tx_fifo_empty(struct musb_hw_ep *hw_ep)
 	return true;
 }
 
-static void cppi41_dma_callback(void *private_data);
+static void cppi41_dma_callback(void *private_data,
+				const struct dmaengine_result *result);
 
 static void cppi41_trans_done(struct cppi41_dma_channel *cppi41_channel)
 {
@@ -154,7 +153,7 @@ static void cppi41_trans_done(struct cppi41_dma_channel *cppi41_channel)
 		if (WARN_ON(!dma_desc))
 			return;
 
-		dma_desc->callback = cppi41_dma_callback;
+		dma_desc->callback_result = cppi41_dma_callback;
 		dma_desc->callback_param = &cppi41_channel->channel;
 		cppi41_channel->cookie = dma_desc->tx_submit(dma_desc);
 		trace_musb_cppi41_cont(cppi41_channel);
@@ -179,7 +178,7 @@ static enum hrtimer_restart cppi41_recheck_tx_req(struct hrtimer *timer)
 
 	controller = container_of(timer, struct cppi41_dma_controller,
 			early_tx);
-	musb = controller->musb;
+	musb = controller->controller.musb;
 
 	spin_lock_irqsave(&musb->lock, flags);
 	list_for_each_entry_safe(cppi41_channel, n, &controller->early_tx_list,
@@ -204,7 +203,8 @@ static enum hrtimer_restart cppi41_recheck_tx_req(struct hrtimer *timer)
 	return ret;
 }
 
-static void cppi41_dma_callback(void *private_data)
+static void cppi41_dma_callback(void *private_data,
+				const struct dmaengine_result *result)
 {
 	struct dma_channel *channel = private_data;
 	struct cppi41_dma_channel *cppi41_channel = channel->private_data;
@@ -217,6 +217,13 @@ static void cppi41_dma_callback(void *private_data)
 	int is_hs = 0;
 	bool empty;
 
+	controller = cppi41_channel->controller;
+	if (controller->controller.dma_callback)
+		controller->controller.dma_callback(&controller->controller);
+
+	if (result->result == DMA_TRANS_ABORTED)
+		return;
+
 	spin_lock_irqsave(&musb->lock, flags);
 
 	dmaengine_tx_status(cppi41_channel->dc, cppi41_channel->cookie,
@@ -249,8 +256,6 @@ static void cppi41_dma_callback(void *private_data)
 	 * We spin on HS (no longer than than 25us and setup a timer on
 	 * FS to check for the bit and complete the transfer.
 	 */
-	controller = cppi41_channel->controller;
-
 	if (is_host_active(musb)) {
 		if (musb->port1_status & USB_PORT_STAT_HIGH_SPEED)
 			is_hs = 1;
@@ -302,6 +307,7 @@ static void cppi41_set_dma_mode(struct cppi41_dma_channel *cppi41_channel,
 		unsigned mode)
 {
 	struct cppi41_dma_controller *controller = cppi41_channel->controller;
+	struct musb *musb = controller->controller.musb;
 	u32 port;
 	u32 new_mode;
 	u32 old_mode;
@@ -317,12 +323,10 @@ static void cppi41_set_dma_mode(struct cppi41_dma_channel *cppi41_channel,
 		return;
 	if (cppi41_channel->is_tx) {
 		controller->tx_mode = new_mode;
-		musb_writel(controller->musb->ctrl_base, USB_CTRL_TX_MODE,
-				new_mode);
+		musb_writel(musb->ctrl_base, USB_CTRL_TX_MODE, new_mode);
 	} else {
 		controller->rx_mode = new_mode;
-		musb_writel(controller->musb->ctrl_base, USB_CTRL_RX_MODE,
-				new_mode);
+		musb_writel(musb->ctrl_base, USB_CTRL_RX_MODE, new_mode);
 	}
 }
 
@@ -341,7 +345,8 @@ static void cppi41_set_autoreq_mode(struct cppi41_dma_channel *cppi41_channel,
 	if (new_mode == old_mode)
 		return;
 	controller->auto_req = new_mode;
-	musb_writel(controller->musb->ctrl_base, USB_CTRL_AUTOREQ, new_mode);
+	musb_writel(controller->controller.musb->ctrl_base, USB_CTRL_AUTOREQ,
+		    new_mode);
 }
 
 static bool cppi41_configure_channel(struct dma_channel *channel,
@@ -352,7 +357,7 @@ static bool cppi41_configure_channel(struct dma_channel *channel,
 	struct dma_chan *dc = cppi41_channel->dc;
 	struct dma_async_tx_descriptor *dma_desc;
 	enum dma_transfer_direction direction;
-	struct musb *musb = cppi41_channel->controller->musb;
+	struct musb *musb = cppi41_channel->controller->controller.musb;
 	unsigned use_gen_rndis = 0;
 
 	cppi41_channel->buf_addr = dma_addr;
@@ -401,7 +406,7 @@ static bool cppi41_configure_channel(struct dma_channel *channel,
 	if (!dma_desc)
 		return false;
 
-	dma_desc->callback = cppi41_dma_callback;
+	dma_desc->callback_result = cppi41_dma_callback;
 	dma_desc->callback_param = channel;
 	cppi41_channel->cookie = dma_desc->tx_submit(dma_desc);
 	cppi41_channel->channel.rx_packet_done = false;
@@ -465,7 +470,7 @@ static int cppi41_dma_channel_program(struct dma_channel *channel,
 	BUG_ON(channel->status == MUSB_DMA_STATUS_UNKNOWN ||
 		channel->status == MUSB_DMA_STATUS_BUSY);
 
-	if (is_host_active(cppi41_channel->controller->musb)) {
+	if (is_host_active(cppi41_channel->controller->controller.musb)) {
 		if (cppi41_channel->is_tx)
 			hb_mult = cppi41_channel->hw_ep->out_qh->hb_mult;
 		else
@@ -490,7 +495,7 @@ static int cppi41_is_compatible(struct dma_channel *channel, u16 maxpacket,
 {
 	struct cppi41_dma_channel *cppi41_channel = channel->private_data;
 	struct cppi41_dma_controller *controller = cppi41_channel->controller;
-	struct musb *musb = controller->musb;
+	struct musb *musb = controller->controller.musb;
 
 	if (is_host_active(musb)) {
 		WARN_ON(1);
@@ -508,7 +513,7 @@ static int cppi41_dma_channel_abort(struct dma_channel *channel)
 {
 	struct cppi41_dma_channel *cppi41_channel = channel->private_data;
 	struct cppi41_dma_controller *controller = cppi41_channel->controller;
-	struct musb *musb = controller->musb;
+	struct musb *musb = controller->controller.musb;
 	void __iomem *epio = cppi41_channel->hw_ep->regs;
 	int tdbit;
 	int ret;
@@ -593,7 +598,7 @@ static void cppi41_dma_controller_stop(struct cppi41_dma_controller *controller)
 
 static int cppi41_dma_controller_start(struct cppi41_dma_controller *controller)
 {
-	struct musb *musb = controller->musb;
+	struct musb *musb = controller->controller.musb;
 	struct device *dev = musb->controller;
 	struct device_node *np = dev->parent->of_node;
 	struct cppi41_dma_channel *cppi41_channel;
@@ -688,13 +693,13 @@ cppi41_dma_controller_create(struct musb *musb, void __iomem *base)
 	hrtimer_init(&controller->early_tx, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
 	controller->early_tx.function = cppi41_recheck_tx_req;
 	INIT_LIST_HEAD(&controller->early_tx_list);
-	controller->musb = musb;
 
 	controller->controller.channel_alloc = cppi41_dma_channel_allocate;
 	controller->controller.channel_release = cppi41_dma_channel_release;
 	controller->controller.channel_program = cppi41_dma_channel_program;
 	controller->controller.channel_abort = cppi41_dma_channel_abort;
 	controller->controller.is_compatible = cppi41_is_compatible;
+	controller->controller.musb = musb;
 
 	ret = cppi41_dma_controller_start(controller);
 	if (ret)
diff --git a/drivers/usb/musb/musb_debugfs.c b/drivers/usb/musb/musb_debugfs.c
index dd70c88419d2..952733ceaac8 100644
--- a/drivers/usb/musb/musb_debugfs.c
+++ b/drivers/usb/musb/musb_debugfs.c
@@ -153,28 +153,34 @@ static int musb_test_mode_show(struct seq_file *s, void *unused)
 	pm_runtime_mark_last_busy(musb->controller);
 	pm_runtime_put_autosuspend(musb->controller);
 
-	if (test & MUSB_TEST_FORCE_HOST)
+	if (test == (MUSB_TEST_FORCE_HOST | MUSB_TEST_FORCE_FS))
+		seq_printf(s, "force host full-speed\n");
+
+	else if (test == (MUSB_TEST_FORCE_HOST | MUSB_TEST_FORCE_HS))
+		seq_printf(s, "force host high-speed\n");
+
+	else if (test == MUSB_TEST_FORCE_HOST)
 		seq_printf(s, "force host\n");
 
-	if (test & MUSB_TEST_FIFO_ACCESS)
+	else if (test == MUSB_TEST_FIFO_ACCESS)
 		seq_printf(s, "fifo access\n");
 
-	if (test & MUSB_TEST_FORCE_FS)
+	else if (test == MUSB_TEST_FORCE_FS)
 		seq_printf(s, "force full-speed\n");
 
-	if (test & MUSB_TEST_FORCE_HS)
+	else if (test == MUSB_TEST_FORCE_HS)
 		seq_printf(s, "force high-speed\n");
 
-	if (test & MUSB_TEST_PACKET)
+	else if (test == MUSB_TEST_PACKET)
 		seq_printf(s, "test packet\n");
 
-	if (test & MUSB_TEST_K)
+	else if (test == MUSB_TEST_K)
 		seq_printf(s, "test K\n");
 
-	if (test & MUSB_TEST_J)
+	else if (test == MUSB_TEST_J)
 		seq_printf(s, "test J\n");
 
-	if (test & MUSB_TEST_SE0_NAK)
+	else if (test == MUSB_TEST_SE0_NAK)
 		seq_printf(s, "test SE0 NAK\n");
 
 	return 0;
@@ -198,7 +204,7 @@ static ssize_t musb_test_mode_write(struct file *file,
 	struct seq_file		*s = file->private_data;
 	struct musb		*musb = s->private;
 	u8			test;
-	char			buf[18];
+	char			buf[24];
 
 	pm_runtime_get_sync(musb->controller);
 	test = musb_readb(musb->mregs, MUSB_TESTMODE);
@@ -213,30 +219,36 @@ static ssize_t musb_test_mode_write(struct file *file,
 	if (copy_from_user(buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
 		return -EFAULT;
 
-	if (strstarts(buf, "force host"))
+	if (strstarts(buf, "force host full-speed"))
+		test = MUSB_TEST_FORCE_HOST | MUSB_TEST_FORCE_FS;
+
+	else if (strstarts(buf, "force host high-speed"))
+		test = MUSB_TEST_FORCE_HOST | MUSB_TEST_FORCE_HS;
+
+	else if (strstarts(buf, "force host"))
 		test = MUSB_TEST_FORCE_HOST;
 
-	if (strstarts(buf, "fifo access"))
+	else if (strstarts(buf, "fifo access"))
 		test = MUSB_TEST_FIFO_ACCESS;
 
-	if (strstarts(buf, "force full-speed"))
+	else if (strstarts(buf, "force full-speed"))
 		test = MUSB_TEST_FORCE_FS;
 
-	if (strstarts(buf, "force high-speed"))
+	else if (strstarts(buf, "force high-speed"))
 		test = MUSB_TEST_FORCE_HS;
 
-	if (strstarts(buf, "test packet")) {
+	else if (strstarts(buf, "test packet")) {
 		test = MUSB_TEST_PACKET;
 		musb_load_testpacket(musb);
 	}
 
-	if (strstarts(buf, "test K"))
+	else if (strstarts(buf, "test K"))
 		test = MUSB_TEST_K;
 
-	if (strstarts(buf, "test J"))
+	else if (strstarts(buf, "test J"))
 		test = MUSB_TEST_J;
 
-	if (strstarts(buf, "test SE0 NAK"))
+	else if (strstarts(buf, "test SE0 NAK"))
 		test = MUSB_TEST_SE0_NAK;
 
 	musb_writeb(musb->mregs, MUSB_TESTMODE, test);
diff --git a/drivers/usb/musb/musb_dma.h b/drivers/usb/musb/musb_dma.h
index 46357e183b4c..04c3bd86bd62 100644
--- a/drivers/usb/musb/musb_dma.h
+++ b/drivers/usb/musb/musb_dma.h
@@ -173,6 +173,7 @@ dma_channel_status(struct dma_channel *c)
 
 /**
  * struct dma_controller - A DMA Controller.
+ * @musb: the usb controller
  * @start: call this to start a DMA controller;
  *	return 0 on success, else negative errno
  * @stop: call this to stop a DMA controller
@@ -181,10 +182,13 @@ dma_channel_status(struct dma_channel *c)
  * @channel_release: call this to release a DMA channel
  * @channel_abort: call this to abort a pending DMA transaction,
  *	returning it to FREE (but allocated) state
+ * @dma_callback: invoked on DMA completion, useful to run platform
+ *	code such IRQ acknowledgment.
  *
  * Controllers manage dma channels.
  */
 struct dma_controller {
+	struct musb *musb;
 	struct dma_channel	*(*channel_alloc)(struct dma_controller *,
 					struct musb_hw_ep *, u8 is_tx);
 	void			(*channel_release)(struct dma_channel *);
@@ -196,6 +200,7 @@ struct dma_controller {
 	int			(*is_compatible)(struct dma_channel *channel,
 							u16 maxpacket,
 							void *buf, u32 length);
+	void			(*dma_callback)(struct dma_controller *);
 };
 
 /* called after channel_program(), may indicate a fault */
diff --git a/drivers/usb/musb/musb_dsps.c b/drivers/usb/musb/musb_dsps.c
index 9f125e179acd..7c047c4a2565 100644
--- a/drivers/usb/musb/musb_dsps.c
+++ b/drivers/usb/musb/musb_dsps.c
@@ -118,9 +118,11 @@ struct dsps_glue {
 	struct device *dev;
 	struct platform_device *musb;	/* child musb pdev */
 	const struct dsps_musb_wrapper *wrp; /* wrapper register offsets */
+	int vbus_irq;			/* optional vbus irq */
 	struct timer_list timer;	/* otg_workaround timer */
 	unsigned long last_timer;    /* last timer data for each instance */
 	bool sw_babble_enabled;
+	void __iomem *usbss_base;
 
 	struct dsps_context context;
 	struct debugfs_regset32 regset;
@@ -145,6 +147,36 @@ static const struct debugfs_reg32 dsps_musb_regs[] = {
 	{ "mode",		0xe8 },
 };
 
+static void dsps_mod_timer(struct dsps_glue *glue, int wait_ms)
+{
+	int wait;
+
+	if (wait_ms < 0)
+		wait = msecs_to_jiffies(glue->wrp->poll_timeout);
+	else
+		wait = msecs_to_jiffies(wait_ms);
+
+	mod_timer(&glue->timer, jiffies + wait);
+}
+
+/*
+ * If no vbus irq from the PMIC is configured, we need to poll VBUS status.
+ */
+static void dsps_mod_timer_optional(struct dsps_glue *glue)
+{
+	if (glue->vbus_irq)
+		return;
+
+	dsps_mod_timer(glue, -1);
+}
+
+/* USBSS  / USB AM335x */
+#define USBSS_IRQ_STATUS	0x28
+#define USBSS_IRQ_ENABLER	0x2c
+#define USBSS_IRQ_CLEARR	0x30
+
+#define USBSS_IRQ_PD_COMP	(1 << 2)
+
 /**
  * dsps_musb_enable - enable interrupts
  */
@@ -167,8 +199,7 @@ static void dsps_musb_enable(struct musb *musb)
 	/* start polling for ID change in dual-role idle mode */
 	if (musb->xceiv->otg->state == OTG_STATE_B_IDLE &&
 			musb->port_mode == MUSB_PORT_MODE_DUAL_ROLE)
-		mod_timer(&glue->timer, jiffies +
-				msecs_to_jiffies(wrp->poll_timeout));
+		dsps_mod_timer(glue, -1);
 }
 
 /**
@@ -186,7 +217,6 @@ static void dsps_musb_disable(struct musb *musb)
 	musb_writel(reg_base, wrp->epintr_clear,
 			 wrp->txep_bitmap | wrp->rxep_bitmap);
 	del_timer_sync(&glue->timer);
-	musb_writeb(musb->mregs, MUSB_DEVCTL, 0);
 }
 
 /* Caller must take musb->lock */
@@ -199,6 +229,9 @@ static int dsps_check_status(struct musb *musb, void *unused)
 	u8 devctl;
 	int skip_session = 0;
 
+	if (glue->vbus_irq)
+		del_timer(&glue->timer);
+
 	/*
 	 * We poll because DSPS IP's won't expose several OTG-critical
 	 * status change events (from the transceiver) otherwise.
@@ -209,8 +242,7 @@ static int dsps_check_status(struct musb *musb, void *unused)
 
 	switch (musb->xceiv->otg->state) {
 	case OTG_STATE_A_WAIT_VRISE:
-		mod_timer(&glue->timer, jiffies +
-				msecs_to_jiffies(wrp->poll_timeout));
+		dsps_mod_timer_optional(glue);
 		break;
 	case OTG_STATE_A_WAIT_BCON:
 		musb_writeb(musb->mregs, MUSB_DEVCTL, 0);
@@ -219,17 +251,19 @@ static int dsps_check_status(struct musb *musb, void *unused)
 
 	case OTG_STATE_A_IDLE:
 	case OTG_STATE_B_IDLE:
-		if (devctl & MUSB_DEVCTL_BDEVICE) {
-			musb->xceiv->otg->state = OTG_STATE_B_IDLE;
-			MUSB_DEV_MODE(musb);
-		} else {
-			musb->xceiv->otg->state = OTG_STATE_A_IDLE;
-			MUSB_HST_MODE(musb);
+		if (!glue->vbus_irq) {
+			if (devctl & MUSB_DEVCTL_BDEVICE) {
+				musb->xceiv->otg->state = OTG_STATE_B_IDLE;
+				MUSB_DEV_MODE(musb);
+			} else {
+				musb->xceiv->otg->state = OTG_STATE_A_IDLE;
+				MUSB_HST_MODE(musb);
+			}
+			if (!(devctl & MUSB_DEVCTL_SESSION) && !skip_session)
+				musb_writeb(mregs, MUSB_DEVCTL,
+					    MUSB_DEVCTL_SESSION);
 		}
-		if (!(devctl & MUSB_DEVCTL_SESSION) && !skip_session)
-			musb_writeb(mregs, MUSB_DEVCTL, MUSB_DEVCTL_SESSION);
-		mod_timer(&glue->timer, jiffies +
-				msecs_to_jiffies(wrp->poll_timeout));
+		dsps_mod_timer_optional(glue);
 		break;
 	case OTG_STATE_A_WAIT_VFALL:
 		musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE;
@@ -267,7 +301,7 @@ static void otg_timer(unsigned long _musb)
 	pm_runtime_put_autosuspend(dev);
 }
 
-void dsps_musb_clear_ep_rxintr(struct musb *musb, int epnum)
+static void dsps_musb_clear_ep_rxintr(struct musb *musb, int epnum)
 {
 	u32 epintr;
 	struct dsps_glue *glue = dev_get_drvdata(musb->controller->parent);
@@ -332,15 +366,13 @@ static irqreturn_t dsps_interrupt(int irq, void *hci)
 			 */
 			musb->int_usb &= ~MUSB_INTR_VBUSERROR;
 			musb->xceiv->otg->state = OTG_STATE_A_WAIT_VFALL;
-			mod_timer(&glue->timer, jiffies +
-					msecs_to_jiffies(wrp->poll_timeout));
+			dsps_mod_timer_optional(glue);
 			WARNING("VBUS error workaround (delay coming)\n");
 		} else if (drvvbus) {
 			MUSB_HST_MODE(musb);
 			musb->xceiv->otg->default_a = 1;
 			musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE;
-			mod_timer(&glue->timer, jiffies +
-				  msecs_to_jiffies(wrp->poll_timeout));
+			dsps_mod_timer_optional(glue);
 		} else {
 			musb->is_active = 0;
 			MUSB_DEV_MODE(musb);
@@ -364,8 +396,7 @@ static irqreturn_t dsps_interrupt(int irq, void *hci)
 	switch (musb->xceiv->otg->state) {
 	case OTG_STATE_B_IDLE:
 	case OTG_STATE_A_WAIT_BCON:
-		mod_timer(&glue->timer, jiffies +
-				msecs_to_jiffies(wrp->poll_timeout));
+		dsps_mod_timer_optional(glue);
 		break;
 	default:
 		break;
@@ -469,8 +500,7 @@ static int dsps_musb_init(struct musb *musb)
 		musb_writeb(musb->mregs, MUSB_BABBLE_CTL, val);
 	}
 
-	mod_timer(&glue->timer, jiffies +
-		  msecs_to_jiffies(glue->wrp->poll_timeout));
+	dsps_mod_timer(glue, -1);
 
 	return dsps_musb_dbg_init(musb, glue);
 }
@@ -619,14 +649,76 @@ static void dsps_read_fifo32(struct musb_hw_ep *hw_ep, u16 len, u8 *dst)
 	}
 }
 
+#ifdef CONFIG_USB_TI_CPPI41_DMA
+static void dsps_dma_controller_callback(struct dma_controller *c)
+{
+	struct musb *musb = c->musb;
+	struct dsps_glue *glue = dev_get_drvdata(musb->controller->parent);
+	void __iomem *usbss_base = glue->usbss_base;
+	u32 status;
+
+	status = musb_readl(usbss_base, USBSS_IRQ_STATUS);
+	if (status & USBSS_IRQ_PD_COMP)
+		musb_writel(usbss_base, USBSS_IRQ_STATUS, USBSS_IRQ_PD_COMP);
+}
+
+static struct dma_controller *
+dsps_dma_controller_create(struct musb *musb, void __iomem *base)
+{
+	struct dma_controller *controller;
+	struct dsps_glue *glue = dev_get_drvdata(musb->controller->parent);
+	void __iomem *usbss_base = glue->usbss_base;
+
+	controller = cppi41_dma_controller_create(musb, base);
+	if (IS_ERR_OR_NULL(controller))
+		return controller;
+
+	musb_writel(usbss_base, USBSS_IRQ_ENABLER, USBSS_IRQ_PD_COMP);
+	controller->dma_callback = dsps_dma_controller_callback;
+
+	return controller;
+}
+
+static void dsps_dma_controller_destroy(struct dma_controller *c)
+{
+	struct musb *musb = c->musb;
+	struct dsps_glue *glue = dev_get_drvdata(musb->controller->parent);
+	void __iomem *usbss_base = glue->usbss_base;
+
+	musb_writel(usbss_base, USBSS_IRQ_CLEARR, USBSS_IRQ_PD_COMP);
+	cppi41_dma_controller_destroy(c);
+}
+
+#ifdef CONFIG_PM_SLEEP
+static void dsps_dma_controller_suspend(struct dsps_glue *glue)
+{
+	void __iomem *usbss_base = glue->usbss_base;
+
+	musb_writel(usbss_base, USBSS_IRQ_CLEARR, USBSS_IRQ_PD_COMP);
+}
+
+static void dsps_dma_controller_resume(struct dsps_glue *glue)
+{
+	void __iomem *usbss_base = glue->usbss_base;
+
+	musb_writel(usbss_base, USBSS_IRQ_ENABLER, USBSS_IRQ_PD_COMP);
+}
+#endif
+#else /* CONFIG_USB_TI_CPPI41_DMA */
+#ifdef CONFIG_PM_SLEEP
+static void dsps_dma_controller_suspend(struct dsps_glue *glue) {}
+static void dsps_dma_controller_resume(struct dsps_glue *glue) {}
+#endif
+#endif /* CONFIG_USB_TI_CPPI41_DMA */
+
 static struct musb_platform_ops dsps_ops = {
 	.quirks		= MUSB_DMA_CPPI41 | MUSB_INDEXED_EP,
 	.init		= dsps_musb_init,
 	.exit		= dsps_musb_exit,
 
 #ifdef CONFIG_USB_TI_CPPI41_DMA
-	.dma_init	= cppi41_dma_controller_create,
-	.dma_exit	= cppi41_dma_controller_destroy,
+	.dma_init	= dsps_dma_controller_create,
+	.dma_exit	= dsps_dma_controller_destroy,
 #endif
 	.enable		= dsps_musb_enable,
 	.disable	= dsps_musb_disable,
@@ -696,7 +788,8 @@ static int dsps_create_musb_pdev(struct dsps_glue *glue,
 	resources[1] = *res;
 
 	/* allocate the child platform device */
-	musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO);
+	musb = platform_device_alloc("musb-hdrc",
+			(resources[0].start & 0xFFF) == 0x400 ? 0 : 1);
 	if (!musb) {
 		dev_err(dev, "failed to allocate musb device\n");
 		return -ENOMEM;
@@ -765,6 +858,47 @@ err:
 	return ret;
 }
 
+static irqreturn_t dsps_vbus_threaded_irq(int irq, void *priv)
+{
+	struct dsps_glue *glue = priv;
+	struct musb *musb = platform_get_drvdata(glue->musb);
+
+	if (!musb)
+		return IRQ_NONE;
+
+	dev_dbg(glue->dev, "VBUS interrupt\n");
+	dsps_mod_timer(glue, 0);
+
+	return IRQ_HANDLED;
+}
+
+static int dsps_setup_optional_vbus_irq(struct platform_device *pdev,
+					struct dsps_glue *glue)
+{
+	int error;
+
+	glue->vbus_irq = platform_get_irq_byname(pdev, "vbus");
+	if (glue->vbus_irq == -EPROBE_DEFER)
+		return -EPROBE_DEFER;
+
+	if (glue->vbus_irq <= 0) {
+		glue->vbus_irq = 0;
+		return 0;
+	}
+
+	error = devm_request_threaded_irq(glue->dev, glue->vbus_irq,
+					  NULL, dsps_vbus_threaded_irq,
+					  IRQF_ONESHOT,
+					  "vbus", glue);
+	if (error) {
+		glue->vbus_irq = 0;
+		return error;
+	}
+	dev_dbg(glue->dev, "VBUS irq %i configured\n", glue->vbus_irq);
+
+	return 0;
+}
+
 static int dsps_probe(struct platform_device *pdev)
 {
 	const struct of_device_id *match;
@@ -792,6 +926,15 @@ static int dsps_probe(struct platform_device *pdev)
 
 	glue->dev = &pdev->dev;
 	glue->wrp = wrp;
+	glue->usbss_base = of_iomap(pdev->dev.parent->of_node, 0);
+	if (!glue->usbss_base)
+		return -ENXIO;
+
+	if (usb_get_dr_mode(&pdev->dev) == USB_DR_MODE_PERIPHERAL) {
+		ret = dsps_setup_optional_vbus_irq(pdev, glue);
+		if (ret)
+			return ret;
+	}
 
 	platform_set_drvdata(pdev, glue);
 	pm_runtime_enable(&pdev->dev);
@@ -880,6 +1023,8 @@ static int dsps_suspend(struct device *dev)
 	glue->context.tx_mode = musb_readl(mbase, wrp->tx_mode);
 	glue->context.rx_mode = musb_readl(mbase, wrp->rx_mode);
 
+	dsps_dma_controller_suspend(glue);
+
 	return 0;
 }
 
@@ -893,6 +1038,8 @@ static int dsps_resume(struct device *dev)
 	if (!musb)
 		return 0;
 
+	dsps_dma_controller_resume(glue);
+
 	mbase = musb->ctrl_base;
 	musb_writel(mbase, wrp->control, glue->context.control);
 	musb_writel(mbase, wrp->epintr_set, glue->context.epintr);
@@ -903,8 +1050,7 @@ static int dsps_resume(struct device *dev)
 	musb_writel(mbase, wrp->rx_mode, glue->context.rx_mode);
 	if (musb->xceiv->otg->state == OTG_STATE_B_IDLE &&
 	    musb->port_mode == MUSB_PORT_MODE_DUAL_ROLE)
-		mod_timer(&glue->timer, jiffies +
-				msecs_to_jiffies(wrp->poll_timeout));
+		dsps_mod_timer(glue, -1);
 
 	return 0;
 }
diff --git a/drivers/usb/musb/omap2430.c b/drivers/usb/musb/omap2430.c
index 8b73214a9ea3..456f3e6ecf03 100644
--- a/drivers/usb/musb/omap2430.c
+++ b/drivers/usb/musb/omap2430.c
@@ -575,7 +575,7 @@ static int omap2430_runtime_resume(struct device *dev)
 	return 0;
 }
 
-static struct dev_pm_ops omap2430_pm_ops = {
+static const struct dev_pm_ops omap2430_pm_ops = {
 	.runtime_suspend = omap2430_runtime_suspend,
 	.runtime_resume = omap2430_runtime_resume,
 };
diff --git a/drivers/usb/musb/sunxi.c b/drivers/usb/musb/sunxi.c
index d0be0eadd0d9..c9a09b5bb6e5 100644
--- a/drivers/usb/musb/sunxi.c
+++ b/drivers/usb/musb/sunxi.c
@@ -251,14 +251,14 @@ static int sunxi_musb_init(struct musb *musb)
 	writeb(SUNXI_MUSB_VEND0_PIO_MODE, musb->mregs + SUNXI_MUSB_VEND0);
 
 	/* Register notifier before calling phy_init() */
-	ret = extcon_register_notifier(glue->extcon, EXTCON_USB_HOST,
-				       &glue->host_nb);
+	ret = devm_extcon_register_notifier(glue->dev, glue->extcon,
+					EXTCON_USB_HOST, &glue->host_nb);
 	if (ret)
 		goto error_reset_assert;
 
 	ret = phy_init(glue->phy);
 	if (ret)
-		goto error_unregister_notifier;
+		goto error_reset_assert;
 
 	musb->isr = sunxi_musb_interrupt;
 
@@ -267,9 +267,6 @@ static int sunxi_musb_init(struct musb *musb)
 
 	return 0;
 
-error_unregister_notifier:
-	extcon_unregister_notifier(glue->extcon, EXTCON_USB_HOST,
-				   &glue->host_nb);
 error_reset_assert:
 	if (test_bit(SUNXI_MUSB_FL_HAS_RESET, &glue->flags))
 		reset_control_assert(glue->rst);
@@ -293,9 +290,6 @@ static int sunxi_musb_exit(struct musb *musb)
 
 	phy_exit(glue->phy);
 
-	extcon_unregister_notifier(glue->extcon, EXTCON_USB_HOST,
-				   &glue->host_nb);
-
 	if (test_bit(SUNXI_MUSB_FL_HAS_RESET, &glue->flags))
 		reset_control_assert(glue->rst);
 
@@ -645,7 +639,21 @@ static struct musb_fifo_cfg sunxi_musb_mode_cfg[] = {
 	MUSB_EP_FIFO_SINGLE(5, FIFO_RX, 512),
 };
 
-static struct musb_hdrc_config sunxi_musb_hdrc_config = {
+/* H3/V3s OTG supports only 4 endpoints */
+#define SUNXI_MUSB_MAX_EP_NUM_H3	5
+
+static struct musb_fifo_cfg sunxi_musb_mode_cfg_h3[] = {
+	MUSB_EP_FIFO_SINGLE(1, FIFO_TX, 512),
+	MUSB_EP_FIFO_SINGLE(1, FIFO_RX, 512),
+	MUSB_EP_FIFO_SINGLE(2, FIFO_TX, 512),
+	MUSB_EP_FIFO_SINGLE(2, FIFO_RX, 512),
+	MUSB_EP_FIFO_SINGLE(3, FIFO_TX, 512),
+	MUSB_EP_FIFO_SINGLE(3, FIFO_RX, 512),
+	MUSB_EP_FIFO_SINGLE(4, FIFO_TX, 512),
+	MUSB_EP_FIFO_SINGLE(4, FIFO_RX, 512),
+};
+
+static const struct musb_hdrc_config sunxi_musb_hdrc_config = {
 	.fifo_cfg       = sunxi_musb_mode_cfg,
 	.fifo_cfg_size  = ARRAY_SIZE(sunxi_musb_mode_cfg),
 	.multipoint	= true,
@@ -656,6 +664,18 @@ static struct musb_hdrc_config sunxi_musb_hdrc_config = {
 	.dma		= 0,
 };
 
+static struct musb_hdrc_config sunxi_musb_hdrc_config_h3 = {
+	.fifo_cfg       = sunxi_musb_mode_cfg_h3,
+	.fifo_cfg_size  = ARRAY_SIZE(sunxi_musb_mode_cfg_h3),
+	.multipoint	= true,
+	.dyn_fifo	= true,
+	.soft_con       = true,
+	.num_eps	= SUNXI_MUSB_MAX_EP_NUM_H3,
+	.ram_bits	= SUNXI_MUSB_RAM_BITS,
+	.dma		= 0,
+};
+
+
 static int sunxi_musb_probe(struct platform_device *pdev)
 {
 	struct musb_hdrc_platform_data	pdata;
@@ -698,7 +718,10 @@ static int sunxi_musb_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 	pdata.platform_ops	= &sunxi_musb_ops;
-	pdata.config		= &sunxi_musb_hdrc_config;
+	if (!of_device_is_compatible(np, "allwinner,sun8i-h3-musb"))
+		pdata.config = &sunxi_musb_hdrc_config;
+	else
+		pdata.config = &sunxi_musb_hdrc_config_h3;
 
 	glue->dev = &pdev->dev;
 	INIT_WORK(&glue->work, sunxi_musb_work);
@@ -710,7 +733,8 @@ static int sunxi_musb_probe(struct platform_device *pdev)
 	if (of_device_is_compatible(np, "allwinner,sun6i-a31-musb"))
 		set_bit(SUNXI_MUSB_FL_HAS_RESET, &glue->flags);
 
-	if (of_device_is_compatible(np, "allwinner,sun8i-a33-musb")) {
+	if (of_device_is_compatible(np, "allwinner,sun8i-a33-musb") ||
+	    of_device_is_compatible(np, "allwinner,sun8i-h3-musb")) {
 		set_bit(SUNXI_MUSB_FL_HAS_RESET, &glue->flags);
 		set_bit(SUNXI_MUSB_FL_NO_CONFIGDATA, &glue->flags);
 	}
@@ -804,6 +828,7 @@ static const struct of_device_id sunxi_musb_match[] = {
 	{ .compatible = "allwinner,sun4i-a10-musb", },
 	{ .compatible = "allwinner,sun6i-a31-musb", },
 	{ .compatible = "allwinner,sun8i-a33-musb", },
+	{ .compatible = "allwinner,sun8i-h3-musb", },
 	{}
 };
 MODULE_DEVICE_TABLE(of, sunxi_musb_match);
diff --git a/drivers/usb/musb/tusb6010_omap.c b/drivers/usb/musb/tusb6010_omap.c
index e6959ccb4453..8b43c4b99f04 100644
--- a/drivers/usb/musb/tusb6010_omap.c
+++ b/drivers/usb/musb/tusb6010_omap.c
@@ -56,7 +56,6 @@ struct tusb_omap_dma_ch {
 
 struct tusb_omap_dma {
 	struct dma_controller		controller;
-	struct musb			*musb;
 	void __iomem			*tbase;
 
 	int				ch;
@@ -497,7 +496,7 @@ tusb_omap_dma_allocate(struct dma_controller *c,
 	u32			reg;
 
 	tusb_dma = container_of(c, struct tusb_omap_dma, controller);
-	musb = tusb_dma->musb;
+	musb = tusb_dma->controller.musb;
 	tbase = musb->ctrl_base;
 
 	reg = musb_readl(tbase, TUSB_DMA_INT_MASK);
@@ -534,7 +533,7 @@ tusb_omap_dma_allocate(struct dma_controller *c,
 		dev_name = "TUSB receive";
 	}
 
-	chdat->musb = tusb_dma->musb;
+	chdat->musb = tusb_dma->controller.musb;
 	chdat->tbase = tusb_dma->tbase;
 	chdat->hw_ep = hw_ep;
 	chdat->epnum = hw_ep->epnum;
@@ -667,7 +666,7 @@ tusb_dma_controller_create(struct musb *musb, void __iomem *base)
 	if (!tusb_dma)
 		goto out;
 
-	tusb_dma->musb = musb;
+	tusb_dma->controller.musb = musb;
 	tusb_dma->tbase = musb->ctrl_base;
 
 	tusb_dma->ch = -1;
diff --git a/drivers/usb/musb/ux500.c b/drivers/usb/musb/ux500.c
index 3eaa4ba6867d..5a572500c418 100644
--- a/drivers/usb/musb/ux500.c
+++ b/drivers/usb/musb/ux500.c
@@ -30,7 +30,7 @@
 
 #include "musb_core.h"
 
-static struct musb_hdrc_config ux500_musb_hdrc_config = {
+static const struct musb_hdrc_config ux500_musb_hdrc_config = {
 	.multipoint	= true,
 	.dyn_fifo	= true,
 	.num_eps	= 16,
diff --git a/drivers/usb/phy/phy-ab8500-usb.c b/drivers/usb/phy/phy-ab8500-usb.c
index a03caf4b1327..61bf2285d5b1 100644
--- a/drivers/usb/phy/phy-ab8500-usb.c
+++ b/drivers/usb/phy/phy-ab8500-usb.c
@@ -1023,38 +1023,6 @@ static void ab8500_usb_vbus_turn_on_event_work(struct work_struct *work)
 	ab->enabled_charging_detection = true;
 }
 
-static unsigned ab8500_eyediagram_workaroud(struct ab8500_usb *ab, unsigned mA)
-{
-	/*
-	 * AB8500 V2 has eye diagram issues when drawing more than 100mA from
-	 * VBUS.  Set charging current to 100mA in case of standard host
-	 */
-	if (is_ab8500_2p0_or_earlier(ab->ab8500))
-		if (mA > 100)
-			mA = 100;
-
-	return mA;
-}
-
-static int ab8500_usb_set_power(struct usb_phy *phy, unsigned mA)
-{
-	struct ab8500_usb *ab;
-
-	if (!phy)
-		return -ENODEV;
-
-	ab = phy_to_ab(phy);
-
-	mA = ab8500_eyediagram_workaroud(ab, mA);
-
-	ab->vbus_draw = mA;
-
-	atomic_notifier_call_chain(&ab->phy.notifier,
-			UX500_MUSB_VBUS, &ab->vbus_draw);
-
-	return 0;
-}
-
 static int ab8500_usb_set_suspend(struct usb_phy *x, int suspend)
 {
 	/* TODO */
@@ -1392,7 +1360,6 @@ static int ab8500_usb_probe(struct platform_device *pdev)
 	ab->phy.otg		= otg;
 	ab->phy.label		= "ab8500";
 	ab->phy.set_suspend	= ab8500_usb_set_suspend;
-	ab->phy.set_power	= ab8500_usb_set_power;
 	ab->phy.otg->state	= OTG_STATE_UNDEFINED;
 
 	otg->usb_phy		= &ab->phy;
diff --git a/drivers/usb/phy/phy-fsl-usb.c b/drivers/usb/phy/phy-fsl-usb.c
index 94eb2923afed..392ab422163c 100644
--- a/drivers/usb/phy/phy-fsl-usb.c
+++ b/drivers/usb/phy/phy-fsl-usb.c
@@ -642,17 +642,6 @@ static int fsl_otg_set_peripheral(struct usb_otg *otg,
 	return 0;
 }
 
-/* Set OTG port power, only for B-device */
-static int fsl_otg_set_power(struct usb_phy *phy, unsigned mA)
-{
-	if (!fsl_otg_dev)
-		return -ENODEV;
-	if (phy->otg->state == OTG_STATE_B_PERIPHERAL)
-		pr_info("FSL OTG: Draw %d mA\n", mA);
-
-	return 0;
-}
-
 /*
  * Delayed pin detect interrupt processing.
  *
@@ -821,7 +810,6 @@ static int fsl_otg_conf(struct platform_device *pdev)
 	/* initialize the otg structure */
 	fsl_otg_tc->phy.label = DRIVER_DESC;
 	fsl_otg_tc->phy.dev = &pdev->dev;
-	fsl_otg_tc->phy.set_power = fsl_otg_set_power;
 
 	fsl_otg_tc->phy.otg->usb_phy = &fsl_otg_tc->phy;
 	fsl_otg_tc->phy.otg->set_host = fsl_otg_set_host;
diff --git a/drivers/usb/phy/phy-msm-usb.c b/drivers/usb/phy/phy-msm-usb.c
index 8a34759727bb..93d9aaad2994 100644
--- a/drivers/usb/phy/phy-msm-usb.c
+++ b/drivers/usb/phy/phy-msm-usb.c
@@ -842,23 +842,6 @@ static void msm_otg_notify_charger(struct msm_otg *motg, unsigned mA)
 	motg->cur_power = mA;
 }
 
-static int msm_otg_set_power(struct usb_phy *phy, unsigned mA)
-{
-	struct msm_otg *motg = container_of(phy, struct msm_otg, phy);
-
-	/*
-	 * Gadget driver uses set_power method to notify about the
-	 * available current based on suspend/configured states.
-	 *
-	 * IDEV_CHG can be drawn irrespective of suspend/un-configured
-	 * states when CDP/ACA is connected.
-	 */
-	if (motg->chg_type == USB_SDP_CHARGER)
-		msm_otg_notify_charger(motg, mA);
-
-	return 0;
-}
-
 static void msm_otg_start_host(struct usb_phy *phy, int on)
 {
 	struct msm_otg *motg = container_of(phy, struct msm_otg, phy);
@@ -1742,14 +1725,14 @@ static int msm_otg_read_dt(struct platform_device *pdev, struct msm_otg *motg)
 	if (!IS_ERR(ext_vbus)) {
 		motg->vbus.extcon = ext_vbus;
 		motg->vbus.nb.notifier_call = msm_otg_vbus_notifier;
-		ret = extcon_register_notifier(ext_vbus, EXTCON_USB,
-						&motg->vbus.nb);
+		ret = devm_extcon_register_notifier(&pdev->dev, ext_vbus,
+						EXTCON_USB, &motg->vbus.nb);
 		if (ret < 0) {
 			dev_err(&pdev->dev, "register VBUS notifier failed\n");
 			return ret;
 		}
 
-		ret = extcon_get_cable_state_(ext_vbus, EXTCON_USB);
+		ret = extcon_get_state(ext_vbus, EXTCON_USB);
 		if (ret)
 			set_bit(B_SESS_VLD, &motg->inputs);
 		else
@@ -1759,16 +1742,14 @@ static int msm_otg_read_dt(struct platform_device *pdev, struct msm_otg *motg)
 	if (!IS_ERR(ext_id)) {
 		motg->id.extcon = ext_id;
 		motg->id.nb.notifier_call = msm_otg_id_notifier;
-		ret = extcon_register_notifier(ext_id, EXTCON_USB_HOST,
-						&motg->id.nb);
+		ret = devm_extcon_register_notifier(&pdev->dev, ext_id,
+						EXTCON_USB_HOST, &motg->id.nb);
 		if (ret < 0) {
 			dev_err(&pdev->dev, "register ID notifier failed\n");
-			extcon_unregister_notifier(motg->vbus.extcon,
-						   EXTCON_USB, &motg->vbus.nb);
 			return ret;
 		}
 
-		ret = extcon_get_cable_state_(ext_id, EXTCON_USB_HOST);
+		ret = extcon_get_state(ext_id, EXTCON_USB_HOST);
 		if (ret)
 			clear_bit(ID, &motg->inputs);
 		else
@@ -1883,10 +1864,9 @@ static int msm_otg_probe(struct platform_device *pdev)
 	 */
 	if (motg->phy_number) {
 		phy_select = devm_ioremap_nocache(&pdev->dev, USB2_PHY_SEL, 4);
-		if (!phy_select) {
-			ret = -ENOMEM;
-			goto unregister_extcon;
-		}
+		if (!phy_select)
+			return -ENOMEM;
+
 		/* Enable second PHY with the OTG port */
 		writel(0x1, phy_select);
 	}
@@ -1897,7 +1877,7 @@ static int msm_otg_probe(struct platform_device *pdev)
 	if (motg->irq < 0) {
 		dev_err(&pdev->dev, "platform_get_irq failed\n");
 		ret = motg->irq;
-		goto unregister_extcon;
+		return motg->irq;
 	}
 
 	regs[0].supply = "vddcx";
@@ -1906,7 +1886,7 @@ static int msm_otg_probe(struct platform_device *pdev)
 
 	ret = devm_regulator_bulk_get(motg->phy.dev, ARRAY_SIZE(regs), regs);
 	if (ret)
-		goto unregister_extcon;
+		return ret;
 
 	motg->vddcx = regs[0].consumer;
 	motg->v3p3  = regs[1].consumer;
@@ -1950,7 +1930,6 @@ static int msm_otg_probe(struct platform_device *pdev)
 	}
 
 	phy->init = msm_phy_init;
-	phy->set_power = msm_otg_set_power;
 	phy->notify_disconnect = msm_phy_notify_disconnect;
 	phy->type = USB_PHY_TYPE_USB2;
 
@@ -2003,11 +1982,6 @@ disable_clks:
 	clk_disable_unprepare(motg->clk);
 	if (!IS_ERR(motg->core_clk))
 		clk_disable_unprepare(motg->core_clk);
-unregister_extcon:
-	extcon_unregister_notifier(motg->id.extcon,
-				   EXTCON_USB_HOST, &motg->id.nb);
-	extcon_unregister_notifier(motg->vbus.extcon,
-				   EXTCON_USB, &motg->vbus.nb);
 
 	return ret;
 }
@@ -2029,9 +2003,6 @@ static int msm_otg_remove(struct platform_device *pdev)
 	 */
 	gpiod_set_value_cansleep(motg->switch_gpio, 0);
 
-	extcon_unregister_notifier(motg->id.extcon, EXTCON_USB_HOST, &motg->id.nb);
-	extcon_unregister_notifier(motg->vbus.extcon, EXTCON_USB, &motg->vbus.nb);
-
 	msm_otg_debugfs_cleanup();
 	cancel_delayed_work_sync(&motg->chg_work);
 	cancel_work_sync(&motg->sm_work);
diff --git a/drivers/usb/phy/phy-omap-otg.c b/drivers/usb/phy/phy-omap-otg.c
index 6523af4f8f93..800d1d90753d 100644
--- a/drivers/usb/phy/phy-omap-otg.c
+++ b/drivers/usb/phy/phy-omap-otg.c
@@ -118,19 +118,19 @@ static int omap_otg_probe(struct platform_device *pdev)
 	otg_dev->id_nb.notifier_call = omap_otg_id_notifier;
 	otg_dev->vbus_nb.notifier_call = omap_otg_vbus_notifier;
 
-	ret = extcon_register_notifier(extcon, EXTCON_USB_HOST, &otg_dev->id_nb);
+	ret = devm_extcon_register_notifier(&pdev->dev, extcon,
+					EXTCON_USB_HOST, &otg_dev->id_nb);
 	if (ret)
 		return ret;
 
-	ret = extcon_register_notifier(extcon, EXTCON_USB, &otg_dev->vbus_nb);
+	ret = devm_extcon_register_notifier(&pdev->dev, extcon,
+					EXTCON_USB, &otg_dev->vbus_nb);
 	if (ret) {
-		extcon_unregister_notifier(extcon, EXTCON_USB_HOST,
-					&otg_dev->id_nb);
 		return ret;
 	}
 
-	otg_dev->id = extcon_get_cable_state_(extcon, EXTCON_USB_HOST);
-	otg_dev->vbus = extcon_get_cable_state_(extcon, EXTCON_USB);
+	otg_dev->id = extcon_get_state(extcon, EXTCON_USB_HOST);
+	otg_dev->vbus = extcon_get_state(extcon, EXTCON_USB);
 	omap_otg_set_mode(otg_dev);
 
 	rev = readl(otg_dev->base);
@@ -145,20 +145,8 @@ static int omap_otg_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int omap_otg_remove(struct platform_device *pdev)
-{
-	struct otg_device *otg_dev = platform_get_drvdata(pdev);
-	struct extcon_dev *edev = otg_dev->extcon;
-
-	extcon_unregister_notifier(edev, EXTCON_USB_HOST, &otg_dev->id_nb);
-	extcon_unregister_notifier(edev, EXTCON_USB, &otg_dev->vbus_nb);
-
-	return 0;
-}
-
 static struct platform_driver omap_otg_driver = {
 	.probe		= omap_otg_probe,
-	.remove		= omap_otg_remove,
 	.driver		= {
 		.name	= "omap_otg",
 	},
diff --git a/drivers/usb/phy/phy-qcom-8x16-usb.c b/drivers/usb/phy/phy-qcom-8x16-usb.c
index d8593adb3621..fdf686398772 100644
--- a/drivers/usb/phy/phy-qcom-8x16-usb.c
+++ b/drivers/usb/phy/phy-qcom-8x16-usb.c
@@ -187,7 +187,7 @@ static int phy_8x16_init(struct usb_phy *phy)
 	val = ULPI_PWR_OTG_COMP_DISABLE;
 	usb_phy_io_write(phy, val, ULPI_SET(ULPI_PWR_CLK_MNG_REG));
 
-	state = extcon_get_cable_state_(qphy->vbus_edev, EXTCON_USB);
+	state = extcon_get_state(qphy->vbus_edev, EXTCON_USB);
 	if (state)
 		phy_8x16_vbus_on(qphy);
 	else
@@ -316,23 +316,20 @@ static int phy_8x16_probe(struct platform_device *pdev)
 		goto off_clks;
 
 	qphy->vbus_notify.notifier_call = phy_8x16_vbus_notify;
-	ret = extcon_register_notifier(qphy->vbus_edev, EXTCON_USB,
-				       &qphy->vbus_notify);
+	ret = devm_extcon_register_notifier(&pdev->dev, qphy->vbus_edev,
+					EXTCON_USB, &qphy->vbus_notify);
 	if (ret < 0)
 		goto off_power;
 
 	ret = usb_add_phy_dev(&qphy->phy);
 	if (ret)
-		goto off_extcon;
+		goto off_power;
 
 	qphy->reboot_notify.notifier_call = phy_8x16_reboot_notify;
 	register_reboot_notifier(&qphy->reboot_notify);
 
 	return 0;
 
-off_extcon:
-	extcon_unregister_notifier(qphy->vbus_edev, EXTCON_USB,
-				   &qphy->vbus_notify);
 off_power:
 	regulator_bulk_disable(ARRAY_SIZE(qphy->regulator), qphy->regulator);
 off_clks:
@@ -347,8 +344,6 @@ static int phy_8x16_remove(struct platform_device *pdev)
 	struct phy_8x16 *qphy = platform_get_drvdata(pdev);
 
 	unregister_reboot_notifier(&qphy->reboot_notify);
-	extcon_unregister_notifier(qphy->vbus_edev, EXTCON_USB,
-				   &qphy->vbus_notify);
 
 	/*
 	 * Ensure that D+/D- lines are routed to uB connector, so
diff --git a/drivers/usb/phy/phy-tahvo.c b/drivers/usb/phy/phy-tahvo.c
index ab5d364f6e8c..a31c8682e998 100644
--- a/drivers/usb/phy/phy-tahvo.c
+++ b/drivers/usb/phy/phy-tahvo.c
@@ -121,7 +121,7 @@ static void check_vbus_state(struct tahvo_usb *tu)
 	prev_state = tu->vbus_state;
 	tu->vbus_state = reg & TAHVO_STAT_VBUS;
 	if (prev_state != tu->vbus_state) {
-		extcon_set_cable_state_(tu->extcon, EXTCON_USB, tu->vbus_state);
+		extcon_set_state_sync(tu->extcon, EXTCON_USB, tu->vbus_state);
 		sysfs_notify(&tu->pt_dev->dev.kobj, NULL, "vbus_state");
 	}
 }
@@ -130,7 +130,7 @@ static void tahvo_usb_become_host(struct tahvo_usb *tu)
 {
 	struct retu_dev *rdev = dev_get_drvdata(tu->pt_dev->dev.parent);
 
-	extcon_set_cable_state_(tu->extcon, EXTCON_USB_HOST, true);
+	extcon_set_state_sync(tu->extcon, EXTCON_USB_HOST, true);
 
 	/* Power up the transceiver in USB host mode */
 	retu_write(rdev, TAHVO_REG_USBR, USBR_REGOUT | USBR_NSUSPEND |
@@ -149,7 +149,7 @@ static void tahvo_usb_become_peripheral(struct tahvo_usb *tu)
 {
 	struct retu_dev *rdev = dev_get_drvdata(tu->pt_dev->dev.parent);
 
-	extcon_set_cable_state_(tu->extcon, EXTCON_USB_HOST, false);
+	extcon_set_state_sync(tu->extcon, EXTCON_USB_HOST, false);
 
 	/* Power up transceiver and set it in USB peripheral mode */
 	retu_write(rdev, TAHVO_REG_USBR, USBR_SLAVE_CONTROL | USBR_REGOUT |
@@ -379,9 +379,9 @@ static int tahvo_usb_probe(struct platform_device *pdev)
 	}
 
 	/* Set the initial cable state. */
-	extcon_set_cable_state_(tu->extcon, EXTCON_USB_HOST,
+	extcon_set_state_sync(tu->extcon, EXTCON_USB_HOST,
 			       tu->tahvo_mode == TAHVO_MODE_HOST);
-	extcon_set_cable_state_(tu->extcon, EXTCON_USB, tu->vbus_state);
+	extcon_set_state_sync(tu->extcon, EXTCON_USB, tu->vbus_state);
 
 	/* Create OTG interface */
 	tahvo_usb_power_off(tu);
diff --git a/drivers/usb/renesas_usbhs/common.c b/drivers/usb/renesas_usbhs/common.c
index 012a37aa3e0d..623c51300393 100644
--- a/drivers/usb/renesas_usbhs/common.c
+++ b/drivers/usb/renesas_usbhs/common.c
@@ -389,7 +389,7 @@ static void usbhsc_hotplug(struct usbhs_priv *priv)
 
 	if (enable && !mod) {
 		if (priv->edev) {
-			cable = extcon_get_cable_state_(priv->edev, EXTCON_USB_HOST);
+			cable = extcon_get_state(priv->edev, EXTCON_USB_HOST);
 			if ((cable > 0 && id != USBHS_HOST) ||
 			    (!cable && id != USBHS_GADGET)) {
 				dev_info(&pdev->dev,
diff --git a/drivers/usb/renesas_usbhs/mod_host.c b/drivers/usb/renesas_usbhs/mod_host.c
index 165e81bfd93a..dfb346e9bd0c 100644
--- a/drivers/usb/renesas_usbhs/mod_host.c
+++ b/drivers/usb/renesas_usbhs/mod_host.c
@@ -577,7 +577,7 @@ static struct usbhsh_device *usbhsh_device_attach(struct usbhsh_hpriv *hpriv,
 		upphub	= usbhsh_device_number(hpriv, parent);
 		hubport	= usbhsh_device_hubport(udev);
 
-		dev_dbg(dev, "%s connecte to Hub [%d:%d](%p)\n", __func__,
+		dev_dbg(dev, "%s connected to Hub [%d:%d](%p)\n", __func__,
 			upphub, hubport, parent);
 	}
 
diff --git a/drivers/usb/serial/Kconfig b/drivers/usb/serial/Kconfig
index d9bc8dafe000..a8d5f2e4878d 100644
--- a/drivers/usb/serial/Kconfig
+++ b/drivers/usb/serial/Kconfig
@@ -713,6 +713,15 @@ config USB_SERIAL_QT2
 	  To compile this driver as a module, choose M here: the
 	  module will be called quatech-serial.
 
+config USB_SERIAL_UPD78F0730
+	tristate "USB Renesas uPD78F0730 Single Port Serial Driver"
+	help
+	  Say Y here if you want to use the Renesas uPD78F0730
+	  serial driver.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called upd78f0730.
+
 config USB_SERIAL_DEBUG
 	tristate "USB Debugging Device"
 	help
diff --git a/drivers/usb/serial/Makefile b/drivers/usb/serial/Makefile
index 9e43b7b002eb..5a21a82390e1 100644
--- a/drivers/usb/serial/Makefile
+++ b/drivers/usb/serial/Makefile
@@ -56,6 +56,7 @@ obj-$(CONFIG_USB_SERIAL_SSU100)			+= ssu100.o
 obj-$(CONFIG_USB_SERIAL_SYMBOL)			+= symbolserial.o
 obj-$(CONFIG_USB_SERIAL_WWAN)			+= usb_wwan.o
 obj-$(CONFIG_USB_SERIAL_TI)			+= ti_usb_3410_5052.o
+obj-$(CONFIG_USB_SERIAL_UPD78F0730)		+= upd78f0730.o
 obj-$(CONFIG_USB_SERIAL_VISOR)			+= visor.o
 obj-$(CONFIG_USB_SERIAL_WISHBONE)		+= wishbone-serial.o
 obj-$(CONFIG_USB_SERIAL_WHITEHEAT)		+= whiteheat.o
diff --git a/drivers/usb/serial/ark3116.c b/drivers/usb/serial/ark3116.c
index 1532cde8a437..2779e59c30f1 100644
--- a/drivers/usb/serial/ark3116.c
+++ b/drivers/usb/serial/ark3116.c
@@ -99,10 +99,17 @@ static int ark3116_read_reg(struct usb_serial *serial,
 				 usb_rcvctrlpipe(serial->dev, 0),
 				 0xfe, 0xc0, 0, reg,
 				 buf, 1, ARK_TIMEOUT);
-	if (result < 0)
+	if (result < 1) {
+		dev_err(&serial->interface->dev,
+				"failed to read register %u: %d\n",
+				reg, result);
+		if (result >= 0)
+			result = -EIO;
+
 		return result;
-	else
-		return buf[0];
+	}
+
+	return buf[0];
 }
 
 static inline int calc_divisor(int bps)
@@ -118,17 +125,11 @@ static inline int calc_divisor(int bps)
 static int ark3116_attach(struct usb_serial *serial)
 {
 	/* make sure we have our end-points */
-	if ((serial->num_bulk_in == 0) ||
-	    (serial->num_bulk_out == 0) ||
-	    (serial->num_interrupt_in == 0)) {
-		dev_err(&serial->dev->dev,
-			"%s - missing endpoint - "
-			"bulk in: %d, bulk out: %d, int in %d\n",
-			KBUILD_MODNAME,
-			serial->num_bulk_in,
-			serial->num_bulk_out,
-			serial->num_interrupt_in);
-		return -EINVAL;
+	if (serial->num_bulk_in == 0 ||
+			serial->num_bulk_out == 0 ||
+			serial->num_interrupt_in == 0) {
+		dev_err(&serial->interface->dev, "missing endpoint\n");
+		return -ENODEV;
 	}
 
 	return 0;
@@ -186,10 +187,8 @@ static int ark3116_port_probe(struct usb_serial_port *port)
 	if (priv->irda)
 		ark3116_write_reg(serial, 0x9, 0);
 
-	dev_info(&serial->dev->dev,
-		"%s using %s mode\n",
-		KBUILD_MODNAME,
-		priv->irda ? "IrDA" : "RS232");
+	dev_info(&port->dev, "using %s mode\n", priv->irda ? "IrDA" : "RS232");
+
 	return 0;
 }
 
@@ -325,9 +324,8 @@ static void ark3116_set_termios(struct tty_struct *tty,
 
 	/* check for software flow control */
 	if (I_IXOFF(tty) || I_IXON(tty)) {
-		dev_warn(&serial->dev->dev,
-			 "%s: don't know how to do software flow control\n",
-			 KBUILD_MODNAME);
+		dev_warn(&port->dev,
+				"software flow control not implemented\n");
 	}
 
 	/* Don't rewrite B0 */
@@ -346,8 +344,8 @@ static void ark3116_close(struct usb_serial_port *port)
 	ark3116_write_reg(serial, UART_IER, 0);
 
 	usb_serial_generic_close(port);
-	if (serial->num_interrupt_in)
-		usb_kill_urb(port->interrupt_in_urb);
+
+	usb_kill_urb(port->interrupt_in_urb);
 }
 
 static int ark3116_open(struct tty_struct *tty, struct usb_serial_port *port)
@@ -366,23 +364,29 @@ static int ark3116_open(struct tty_struct *tty, struct usb_serial_port *port)
 		dev_dbg(&port->dev,
 			"%s - usb_serial_generic_open failed: %d\n",
 			__func__, result);
-		goto err_out;
+		goto err_free;
 	}
 
 	/* remove any data still left: also clears error state */
 	ark3116_read_reg(serial, UART_RX, buf);
 
 	/* read modem status */
-	priv->msr = ark3116_read_reg(serial, UART_MSR, buf);
+	result = ark3116_read_reg(serial, UART_MSR, buf);
+	if (result < 0)
+		goto err_close;
+	priv->msr = *buf;
+
 	/* read line status */
-	priv->lsr = ark3116_read_reg(serial, UART_LSR, buf);
+	result = ark3116_read_reg(serial, UART_LSR, buf);
+	if (result < 0)
+		goto err_close;
+	priv->lsr = *buf;
 
 	result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
 	if (result) {
 		dev_err(&port->dev, "submit irq_in urb failed %d\n",
 			result);
-		ark3116_close(port);
-		goto err_out;
+		goto err_close;
 	}
 
 	/* activate interrupts */
@@ -395,8 +399,15 @@ static int ark3116_open(struct tty_struct *tty, struct usb_serial_port *port)
 	if (tty)
 		ark3116_set_termios(tty, port, NULL);
 
-err_out:
 	kfree(buf);
+
+	return 0;
+
+err_close:
+	usb_serial_generic_close(port);
+err_free:
+	kfree(buf);
+
 	return result;
 }
 
@@ -602,9 +613,8 @@ static void ark3116_read_int_callback(struct urb *urb)
 
 	result = usb_submit_urb(urb, GFP_ATOMIC);
 	if (result)
-		dev_err(&urb->dev->dev,
-			"%s - Error %d submitting interrupt urb\n",
-			__func__, result);
+		dev_err(&port->dev, "failed to resubmit interrupt urb: %d\n",
+			result);
 }
 
 
diff --git a/drivers/usb/serial/ch341.c b/drivers/usb/serial/ch341.c
index 95aa5233726c..351745aec0e1 100644
--- a/drivers/usb/serial/ch341.c
+++ b/drivers/usb/serial/ch341.c
@@ -93,8 +93,8 @@ MODULE_DEVICE_TABLE(usb, id_table);
 struct ch341_private {
 	spinlock_t lock; /* access lock */
 	unsigned baud_rate; /* set baud rate */
-	u8 line_control; /* set line control value RTS/DTR */
-	u8 line_status; /* active status of modem control inputs */
+	u8 mcr;
+	u8 msr;
 	u8 lcr;
 };
 
@@ -107,8 +107,8 @@ static int ch341_control_out(struct usb_device *dev, u8 request,
 {
 	int r;
 
-	dev_dbg(&dev->dev, "ch341_control_out(%02x,%02x,%04x,%04x)\n",
-		USB_DIR_OUT|0x40, (int)request, (int)value, (int)index);
+	dev_dbg(&dev->dev, "%s - (%02x,%04x,%04x)\n", __func__,
+		request, value, index);
 
 	r = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), request,
 			    USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
@@ -125,9 +125,8 @@ static int ch341_control_in(struct usb_device *dev,
 {
 	int r;
 
-	dev_dbg(&dev->dev, "ch341_control_in(%02x,%02x,%04x,%04x,%p,%u)\n",
-		USB_DIR_IN|0x40, (int)request, (int)value, (int)index, buf,
-		(int)bufsize);
+	dev_dbg(&dev->dev, "%s - (%02x,%04x,%04x,%u)\n", __func__,
+		request, value, index, bufsize);
 
 	r = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), request,
 			    USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
@@ -210,7 +209,7 @@ static int ch341_get_status(struct usb_device *dev, struct ch341_private *priv)
 		goto out;
 
 	spin_lock_irqsave(&priv->lock, flags);
-	priv->line_status = (~(*buffer)) & CH341_BITS_MODEM_STAT;
+	priv->msr = (~(*buffer)) & CH341_BITS_MODEM_STAT;
 	spin_unlock_irqrestore(&priv->lock, flags);
 
 out:	kfree(buffer);
@@ -239,30 +238,11 @@ static int ch341_configure(struct usb_device *dev, struct ch341_private *priv)
 	if (r < 0)
 		goto out;
 
-	/* expect two bytes 0x56 0x00 */
-	r = ch341_control_in(dev, CH341_REQ_READ_REG, 0x2518, 0, buffer, size);
-	if (r < 0)
-		goto out;
-
-	r = ch341_control_out(dev, CH341_REQ_WRITE_REG, 0x2518, 0x0050);
-	if (r < 0)
-		goto out;
-
-	/* expect 0xff 0xee */
-	r = ch341_get_status(dev, priv);
-	if (r < 0)
-		goto out;
-
 	r = ch341_set_baudrate_lcr(dev, priv, priv->lcr);
 	if (r < 0)
 		goto out;
 
-	r = ch341_set_handshake(dev, priv->line_control);
-	if (r < 0)
-		goto out;
-
-	/* expect 0x9f 0xee */
-	r = ch341_get_status(dev, priv);
+	r = ch341_set_handshake(dev, priv->mcr);
 
 out:	kfree(buffer);
 	return r;
@@ -279,6 +259,11 @@ static int ch341_port_probe(struct usb_serial_port *port)
 
 	spin_lock_init(&priv->lock);
 	priv->baud_rate = DEFAULT_BAUD_RATE;
+	/*
+	 * Some CH340 devices appear unable to change the initial LCR
+	 * settings, so set a sane 8N1 default.
+	 */
+	priv->lcr = CH341_LCR_ENABLE_RX | CH341_LCR_ENABLE_TX | CH341_LCR_CS8;
 
 	r = ch341_configure(port->serial->dev, priv);
 	if (r < 0)
@@ -304,7 +289,7 @@ static int ch341_port_remove(struct usb_serial_port *port)
 static int ch341_carrier_raised(struct usb_serial_port *port)
 {
 	struct ch341_private *priv = usb_get_serial_port_data(port);
-	if (priv->line_status & CH341_BIT_DCD)
+	if (priv->msr & CH341_BIT_DCD)
 		return 1;
 	return 0;
 }
@@ -317,11 +302,11 @@ static void ch341_dtr_rts(struct usb_serial_port *port, int on)
 	/* drop DTR and RTS */
 	spin_lock_irqsave(&priv->lock, flags);
 	if (on)
-		priv->line_control |= CH341_BIT_RTS | CH341_BIT_DTR;
+		priv->mcr |= CH341_BIT_RTS | CH341_BIT_DTR;
 	else
-		priv->line_control &= ~(CH341_BIT_RTS | CH341_BIT_DTR);
+		priv->mcr &= ~(CH341_BIT_RTS | CH341_BIT_DTR);
 	spin_unlock_irqrestore(&priv->lock, flags);
-	ch341_set_handshake(port->serial->dev, priv->line_control);
+	ch341_set_handshake(port->serial->dev, priv->mcr);
 }
 
 static void ch341_close(struct usb_serial_port *port)
@@ -334,14 +319,9 @@ static void ch341_close(struct usb_serial_port *port)
 /* open this device, set default parameters */
 static int ch341_open(struct tty_struct *tty, struct usb_serial_port *port)
 {
-	struct usb_serial *serial = port->serial;
 	struct ch341_private *priv = usb_get_serial_port_data(port);
 	int r;
 
-	r = ch341_configure(serial->dev, priv);
-	if (r)
-		return r;
-
 	if (tty)
 		ch341_set_termios(tty, port, NULL);
 
@@ -353,6 +333,12 @@ static int ch341_open(struct tty_struct *tty, struct usb_serial_port *port)
 		return r;
 	}
 
+	r = ch341_get_status(port->serial->dev, priv);
+	if (r < 0) {
+		dev_err(&port->dev, "failed to read modem status: %d\n", r);
+		goto err_kill_interrupt_urb;
+	}
+
 	r = usb_serial_generic_open(tty, port);
 	if (r)
 		goto err_kill_interrupt_urb;
@@ -374,7 +360,7 @@ static void ch341_set_termios(struct tty_struct *tty,
 	struct ch341_private *priv = usb_get_serial_port_data(port);
 	unsigned baud_rate;
 	unsigned long flags;
-	unsigned char ctrl;
+	u8 lcr;
 	int r;
 
 	/* redundant changes may cause the chip to lose bytes */
@@ -383,54 +369,54 @@ static void ch341_set_termios(struct tty_struct *tty,
 
 	baud_rate = tty_get_baud_rate(tty);
 
-	ctrl = CH341_LCR_ENABLE_RX | CH341_LCR_ENABLE_TX;
+	lcr = CH341_LCR_ENABLE_RX | CH341_LCR_ENABLE_TX;
 
 	switch (C_CSIZE(tty)) {
 	case CS5:
-		ctrl |= CH341_LCR_CS5;
+		lcr |= CH341_LCR_CS5;
 		break;
 	case CS6:
-		ctrl |= CH341_LCR_CS6;
+		lcr |= CH341_LCR_CS6;
 		break;
 	case CS7:
-		ctrl |= CH341_LCR_CS7;
+		lcr |= CH341_LCR_CS7;
 		break;
 	case CS8:
-		ctrl |= CH341_LCR_CS8;
+		lcr |= CH341_LCR_CS8;
 		break;
 	}
 
 	if (C_PARENB(tty)) {
-		ctrl |= CH341_LCR_ENABLE_PAR;
+		lcr |= CH341_LCR_ENABLE_PAR;
 		if (C_PARODD(tty) == 0)
-			ctrl |= CH341_LCR_PAR_EVEN;
+			lcr |= CH341_LCR_PAR_EVEN;
 		if (C_CMSPAR(tty))
-			ctrl |= CH341_LCR_MARK_SPACE;
+			lcr |= CH341_LCR_MARK_SPACE;
 	}
 
 	if (C_CSTOPB(tty))
-		ctrl |= CH341_LCR_STOP_BITS_2;
+		lcr |= CH341_LCR_STOP_BITS_2;
 
 	if (baud_rate) {
 		priv->baud_rate = baud_rate;
 
-		r = ch341_set_baudrate_lcr(port->serial->dev, priv, ctrl);
+		r = ch341_set_baudrate_lcr(port->serial->dev, priv, lcr);
 		if (r < 0 && old_termios) {
 			priv->baud_rate = tty_termios_baud_rate(old_termios);
 			tty_termios_copy_hw(&tty->termios, old_termios);
 		} else if (r == 0) {
-			priv->lcr = ctrl;
+			priv->lcr = lcr;
 		}
 	}
 
 	spin_lock_irqsave(&priv->lock, flags);
 	if (C_BAUD(tty) == B0)
-		priv->line_control &= ~(CH341_BIT_DTR | CH341_BIT_RTS);
+		priv->mcr &= ~(CH341_BIT_DTR | CH341_BIT_RTS);
 	else if (old_termios && (old_termios->c_cflag & CBAUD) == B0)
-		priv->line_control |= (CH341_BIT_DTR | CH341_BIT_RTS);
+		priv->mcr |= (CH341_BIT_DTR | CH341_BIT_RTS);
 	spin_unlock_irqrestore(&priv->lock, flags);
 
-	ch341_set_handshake(port->serial->dev, priv->line_control);
+	ch341_set_handshake(port->serial->dev, priv->mcr);
 }
 
 static void ch341_break_ctl(struct tty_struct *tty, int break_state)
@@ -486,20 +472,20 @@ static int ch341_tiocmset(struct tty_struct *tty,
 
 	spin_lock_irqsave(&priv->lock, flags);
 	if (set & TIOCM_RTS)
-		priv->line_control |= CH341_BIT_RTS;
+		priv->mcr |= CH341_BIT_RTS;
 	if (set & TIOCM_DTR)
-		priv->line_control |= CH341_BIT_DTR;
+		priv->mcr |= CH341_BIT_DTR;
 	if (clear & TIOCM_RTS)
-		priv->line_control &= ~CH341_BIT_RTS;
+		priv->mcr &= ~CH341_BIT_RTS;
 	if (clear & TIOCM_DTR)
-		priv->line_control &= ~CH341_BIT_DTR;
-	control = priv->line_control;
+		priv->mcr &= ~CH341_BIT_DTR;
+	control = priv->mcr;
 	spin_unlock_irqrestore(&priv->lock, flags);
 
 	return ch341_set_handshake(port->serial->dev, control);
 }
 
-static void ch341_update_line_status(struct usb_serial_port *port,
+static void ch341_update_status(struct usb_serial_port *port,
 					unsigned char *data, size_t len)
 {
 	struct ch341_private *priv = usb_get_serial_port_data(port);
@@ -514,8 +500,8 @@ static void ch341_update_line_status(struct usb_serial_port *port,
 	status = ~data[2] & CH341_BITS_MODEM_STAT;
 
 	spin_lock_irqsave(&priv->lock, flags);
-	delta = status ^ priv->line_status;
-	priv->line_status = status;
+	delta = status ^ priv->msr;
+	priv->msr = status;
 	spin_unlock_irqrestore(&priv->lock, flags);
 
 	if (data[1] & CH341_MULT_STAT)
@@ -568,7 +554,7 @@ static void ch341_read_int_callback(struct urb *urb)
 	}
 
 	usb_serial_debug_data(&port->dev, __func__, len, data);
-	ch341_update_line_status(port, data, len);
+	ch341_update_status(port, data, len);
 exit:
 	status = usb_submit_urb(urb, GFP_ATOMIC);
 	if (status) {
@@ -587,8 +573,8 @@ static int ch341_tiocmget(struct tty_struct *tty)
 	unsigned int result;
 
 	spin_lock_irqsave(&priv->lock, flags);
-	mcr = priv->line_control;
-	status = priv->line_status;
+	mcr = priv->mcr;
+	status = priv->msr;
 	spin_unlock_irqrestore(&priv->lock, flags);
 
 	result = ((mcr & CH341_BIT_DTR)		? TIOCM_DTR : 0)
@@ -619,6 +605,12 @@ static int ch341_reset_resume(struct usb_serial *serial)
 				ret);
 			return ret;
 		}
+
+		ret = ch341_get_status(port->serial->dev, priv);
+		if (ret < 0) {
+			dev_err(&port->dev, "failed to read modem status: %d\n",
+				ret);
+		}
 	}
 
 	return usb_serial_generic_resume(serial);
diff --git a/drivers/usb/serial/console.c b/drivers/usb/serial/console.c
index 8967715fe6fc..fdf89800ebc3 100644
--- a/drivers/usb/serial/console.c
+++ b/drivers/usb/serial/console.c
@@ -143,6 +143,7 @@ static int usb_console_setup(struct console *co, char *options)
 			tty->driver = usb_serial_tty_driver;
 			tty->index = co->index;
 			init_ldsem(&tty->ldisc_sem);
+			spin_lock_init(&tty->files_lock);
 			INIT_LIST_HEAD(&tty->tty_files);
 			kref_get(&tty->driver->kref);
 			__module_get(tty->driver->owner);
@@ -264,8 +265,7 @@ static struct console usbcons = {
 
 void usb_serial_console_disconnect(struct usb_serial *serial)
 {
-	if (serial && serial->port && serial->port[0]
-				&& serial->port[0] == usbcons_info.port) {
+	if (serial->port[0] == usbcons_info.port) {
 		usb_serial_console_exit();
 		usb_serial_put(serial);
 	}
diff --git a/drivers/usb/serial/cp210x.c b/drivers/usb/serial/cp210x.c
index 5d61d0871f2e..0c55e7f64269 100644
--- a/drivers/usb/serial/cp210x.c
+++ b/drivers/usb/serial/cp210x.c
@@ -178,6 +178,8 @@ static const struct usb_device_id id_table[] = {
 	{ USB_DEVICE(0x1901, 0x0190) }, /* GE B850 CP2105 Recorder interface */
 	{ USB_DEVICE(0x1901, 0x0193) }, /* GE B650 CP2104 PMC interface */
 	{ USB_DEVICE(0x1901, 0x0194) },	/* GE Healthcare Remote Alarm Box */
+	{ USB_DEVICE(0x1901, 0x0195) },	/* GE B850/B650/B450 CP2104 DP UART interface */
+	{ USB_DEVICE(0x1901, 0x0196) },	/* GE B850 CP2105 DP UART interface */
 	{ USB_DEVICE(0x19CF, 0x3000) }, /* Parrot NMEA GPS Flight Recorder */
 	{ USB_DEVICE(0x1ADB, 0x0001) }, /* Schweitzer Engineering C662 Cable */
 	{ USB_DEVICE(0x1B1C, 0x1C00) }, /* Corsair USB Dongle */
diff --git a/drivers/usb/serial/cypress_m8.c b/drivers/usb/serial/cypress_m8.c
index bbeeb2bd55a8..90110de715e0 100644
--- a/drivers/usb/serial/cypress_m8.c
+++ b/drivers/usb/serial/cypress_m8.c
@@ -1069,7 +1069,6 @@ static void cypress_read_int_callback(struct urb *urb)
 	unsigned char *data = urb->transfer_buffer;
 	unsigned long flags;
 	char tty_flag = TTY_NORMAL;
-	int havedata = 0;
 	int bytes = 0;
 	int result;
 	int i = 0;
@@ -1118,16 +1117,12 @@ static void cypress_read_int_callback(struct urb *urb)
 		priv->current_status = data[0] & 0xF8;
 		bytes = data[1] + 2;
 		i = 2;
-		if (bytes > 2)
-			havedata = 1;
 		break;
 	case packet_format_2:
 		/* This is for the CY7C63743... */
 		priv->current_status = data[0] & 0xF8;
 		bytes = (data[0] & 0x07) + 1;
 		i = 1;
-		if (bytes > 1)
-			havedata = 1;
 		break;
 	}
 	spin_unlock_irqrestore(&priv->lock, flags);
diff --git a/drivers/usb/serial/digi_acceleport.c b/drivers/usb/serial/digi_acceleport.c
index 6a1df9e824ca..eb433922598c 100644
--- a/drivers/usb/serial/digi_acceleport.c
+++ b/drivers/usb/serial/digi_acceleport.c
@@ -1398,25 +1398,30 @@ static int digi_read_inb_callback(struct urb *urb)
 {
 	struct usb_serial_port *port = urb->context;
 	struct digi_port *priv = usb_get_serial_port_data(port);
-	int opcode = ((unsigned char *)urb->transfer_buffer)[0];
-	int len = ((unsigned char *)urb->transfer_buffer)[1];
-	int port_status = ((unsigned char *)urb->transfer_buffer)[2];
-	unsigned char *data = ((unsigned char *)urb->transfer_buffer) + 3;
+	unsigned char *buf = urb->transfer_buffer;
+	int opcode;
+	int len;
+	int port_status;
+	unsigned char *data;
 	int flag, throttled;
-	int status = urb->status;
-
-	/* do not process callbacks on closed ports */
-	/* but do continue the read chain */
-	if (urb->status == -ENOENT)
-		return 0;
 
 	/* short/multiple packet check */
+	if (urb->actual_length < 2) {
+		dev_warn(&port->dev, "short packet received\n");
+		return -1;
+	}
+
+	opcode = buf[0];
+	len = buf[1];
+
 	if (urb->actual_length != len + 2) {
-		dev_err(&port->dev, "%s: INCOMPLETE OR MULTIPLE PACKET, "
-			"status=%d, port=%d, opcode=%d, len=%d, "
-			"actual_length=%d, status=%d\n", __func__, status,
-			priv->dp_port_num, opcode, len, urb->actual_length,
-			port_status);
+		dev_err(&port->dev, "malformed packet received: port=%d, opcode=%d, len=%d, actual_length=%u\n",
+			priv->dp_port_num, opcode, len, urb->actual_length);
+		return -1;
+	}
+
+	if (opcode == DIGI_CMD_RECEIVE_DATA && len < 1) {
+		dev_err(&port->dev, "malformed data packet received\n");
 		return -1;
 	}
 
@@ -1430,6 +1435,9 @@ static int digi_read_inb_callback(struct urb *urb)
 
 	/* receive data */
 	if (opcode == DIGI_CMD_RECEIVE_DATA) {
+		port_status = buf[2];
+		data = &buf[3];
+
 		/* get flag from port_status */
 		flag = 0;
 
@@ -1482,16 +1490,20 @@ static int digi_read_oob_callback(struct urb *urb)
 	struct usb_serial *serial = port->serial;
 	struct tty_struct *tty;
 	struct digi_port *priv = usb_get_serial_port_data(port);
+	unsigned char *buf = urb->transfer_buffer;
 	int opcode, line, status, val;
 	int i;
 	unsigned int rts;
 
+	if (urb->actual_length < 4)
+		return -1;
+
 	/* handle each oob command */
-	for (i = 0; i < urb->actual_length - 3;) {
-		opcode = ((unsigned char *)urb->transfer_buffer)[i++];
-		line = ((unsigned char *)urb->transfer_buffer)[i++];
-		status = ((unsigned char *)urb->transfer_buffer)[i++];
-		val = ((unsigned char *)urb->transfer_buffer)[i++];
+	for (i = 0; i < urb->actual_length - 4; i += 4) {
+		opcode = buf[i];
+		line = buf[i + 1];
+		status = buf[i + 2];
+		val = buf[i + 3];
 
 		dev_dbg(&port->dev, "digi_read_oob_callback: opcode=%d, line=%d, status=%d, val=%d\n",
 			opcode, line, status, val);
diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
index 23d14b98ae2a..c540de15aad2 100644
--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -1439,10 +1439,13 @@ static int read_latency_timer(struct usb_serial_port *port)
 			     FTDI_SIO_GET_LATENCY_TIMER_REQUEST_TYPE,
 			     0, priv->interface,
 			     buf, 1, WDR_TIMEOUT);
-	if (rv < 0)
+	if (rv < 1) {
 		dev_err(&port->dev, "Unable to read latency timer: %i\n", rv);
-	else
+		if (rv >= 0)
+			rv = -EIO;
+	} else {
 		priv->latency = buf[0];
+	}
 
 	kfree(buf);
 
@@ -1531,7 +1534,7 @@ check_and_exit:
 }
 
 static int get_lsr_info(struct usb_serial_port *port,
-			struct serial_struct __user *retinfo)
+			unsigned int __user *retinfo)
 {
 	struct ftdi_private *priv = usb_get_serial_port_data(port);
 	unsigned int result = 0;
@@ -1802,8 +1805,6 @@ static int ftdi_sio_port_probe(struct usb_serial_port *port)
 
 	mutex_init(&priv->cfg_lock);
 
-	priv->flags = ASYNC_LOW_LATENCY;
-
 	if (quirk && quirk->port_probe)
 		quirk->port_probe(priv);
 
@@ -2067,6 +2068,20 @@ static int ftdi_process_packet(struct usb_serial_port *port,
 		priv->prev_status = status;
 	}
 
+	/* save if the transmitter is empty or not */
+	if (packet[1] & FTDI_RS_TEMT)
+		priv->transmit_empty = 1;
+	else
+		priv->transmit_empty = 0;
+
+	len -= 2;
+	if (!len)
+		return 0;	/* status only */
+
+	/*
+	 * Break and error status must only be processed for packets with
+	 * data payload to avoid over-reporting.
+	 */
 	flag = TTY_NORMAL;
 	if (packet[1] & FTDI_RS_ERR_MASK) {
 		/* Break takes precedence over parity, which takes precedence
@@ -2089,15 +2104,6 @@ static int ftdi_process_packet(struct usb_serial_port *port,
 		}
 	}
 
-	/* save if the transmitter is empty or not */
-	if (packet[1] & FTDI_RS_TEMT)
-		priv->transmit_empty = 1;
-	else
-		priv->transmit_empty = 0;
-
-	len -= 2;
-	if (!len)
-		return 0;	/* status only */
 	port->icount.rx += len;
 	ch = packet + 2;
 
@@ -2428,8 +2434,12 @@ static int ftdi_get_modem_status(struct usb_serial_port *port,
 			FTDI_SIO_GET_MODEM_STATUS_REQUEST_TYPE,
 			0, priv->interface,
 			buf, len, WDR_TIMEOUT);
-	if (ret < 0) {
+
+	/* NOTE: We allow short responses and handle that below. */
+	if (ret < 1) {
 		dev_err(&port->dev, "failed to get modem status: %d\n", ret);
+		if (ret >= 0)
+			ret = -EIO;
 		ret = usb_translate_errors(ret);
 		goto out;
 	}
@@ -2480,20 +2490,15 @@ static int ftdi_ioctl(struct tty_struct *tty,
 					unsigned int cmd, unsigned long arg)
 {
 	struct usb_serial_port *port = tty->driver_data;
+	void __user *argp = (void __user *)arg;
 
-	/* Based on code from acm.c and others */
 	switch (cmd) {
-
-	case TIOCGSERIAL: /* gets serial port data */
-		return get_serial_info(port,
-					(struct serial_struct __user *) arg);
-
-	case TIOCSSERIAL: /* sets serial port data */
-		return set_serial_info(tty, port,
-					(struct serial_struct __user *) arg);
+	case TIOCGSERIAL:
+		return get_serial_info(port, argp);
+	case TIOCSSERIAL:
+		return set_serial_info(tty, port, argp);
 	case TIOCSERGETLSR:
-		return get_lsr_info(port, (struct serial_struct __user *)arg);
-		break;
+		return get_lsr_info(port, argp);
 	default:
 		break;
 	}
diff --git a/drivers/usb/serial/io_edgeport.c b/drivers/usb/serial/io_edgeport.c
index d50e5773483f..bb7673e80a57 100644
--- a/drivers/usb/serial/io_edgeport.c
+++ b/drivers/usb/serial/io_edgeport.c
@@ -57,6 +57,88 @@
 
 #define OPEN_TIMEOUT		(5*HZ)		/* 5 seconds */
 
+static const struct usb_device_id edgeport_2port_id_table[] = {
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2I) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_421) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_21) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2_DIN) },
+	{ }
+};
+
+static const struct usb_device_id edgeport_4port_id_table[] = {
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_RAPIDPORT_4) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4T) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_MT4X56USB) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4I) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4_DIN) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_22I) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_412_4) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_COMPATIBLE) },
+	{ }
+};
+
+static const struct usb_device_id edgeport_8port_id_table[] = {
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8I) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8R) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8RR) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_412_8) },
+	{ }
+};
+
+static const struct usb_device_id Epic_port_id_table[] = {
+	{ USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0202) },
+	{ USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0203) },
+	{ USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0310) },
+	{ USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0311) },
+	{ USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0312) },
+	{ USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A758) },
+	{ USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A794) },
+	{ USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A225) },
+	{ }
+};
+
+/* Devices that this driver supports */
+static const struct usb_device_id id_table_combined[] = {
+	{ USB_DEVICE(USB_VENDOR_ID_ION,	ION_DEVICE_ID_EDGEPORT_4) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION,	ION_DEVICE_ID_RAPIDPORT_4) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION,	ION_DEVICE_ID_EDGEPORT_4T) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_MT4X56USB) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION,	ION_DEVICE_ID_EDGEPORT_2) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION,	ION_DEVICE_ID_EDGEPORT_4I) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION,	ION_DEVICE_ID_EDGEPORT_2I) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION,	ION_DEVICE_ID_EDGEPORT_421) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION,	ION_DEVICE_ID_EDGEPORT_21) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION,	ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION,	ION_DEVICE_ID_EDGEPORT_8) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION,	ION_DEVICE_ID_EDGEPORT_2_DIN) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION,	ION_DEVICE_ID_EDGEPORT_4_DIN) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION,	ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_22I) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_412_4) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION,	ION_DEVICE_ID_EDGEPORT_COMPATIBLE) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION,	ION_DEVICE_ID_EDGEPORT_8I) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8R) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8RR) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_412_8) },
+	{ USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0202) },
+	{ USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0203) },
+	{ USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0310) },
+	{ USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0311) },
+	{ USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0312) },
+	{ USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A758) },
+	{ USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A794) },
+	{ USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A225) },
+	{ } /* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE(usb, id_table_combined);
+
+
 /* receive port state */
 enum RXSTATE {
 	EXPECT_HDR1 = 0,    /* Expect header byte 1 */
@@ -217,8 +299,6 @@ static void edge_release(struct usb_serial *serial);
 static int edge_port_probe(struct usb_serial_port *port);
 static int edge_port_remove(struct usb_serial_port *port);
 
-#include "io_tables.h"	/* all of the devices that this driver supports */
-
 /* function prototypes for all of our local functions */
 
 static void  process_rcvd_data(struct edgeport_serial *edge_serial,
@@ -492,20 +572,24 @@ static int get_epic_descriptor(struct edgeport_serial *ep)
 	int result;
 	struct usb_serial *serial = ep->serial;
 	struct edgeport_product_info *product_info = &ep->product_info;
-	struct edge_compatibility_descriptor *epic = &ep->epic_descriptor;
+	struct edge_compatibility_descriptor *epic;
 	struct edge_compatibility_bits *bits;
 	struct device *dev = &serial->dev->dev;
 
 	ep->is_epic = 0;
+
+	epic = kmalloc(sizeof(*epic), GFP_KERNEL);
+	if (!epic)
+		return -ENOMEM;
+
 	result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
 				 USB_REQUEST_ION_GET_EPIC_DESC,
 				 0xC0, 0x00, 0x00,
-				 &ep->epic_descriptor,
-				 sizeof(struct edge_compatibility_descriptor),
+				 epic, sizeof(*epic),
 				 300);
-
-	if (result > 0) {
+	if (result == sizeof(*epic)) {
 		ep->is_epic = 1;
+		memcpy(&ep->epic_descriptor, epic, sizeof(*epic));
 		memset(product_info, 0, sizeof(struct edgeport_product_info));
 
 		product_info->NumPorts = epic->NumPorts;
@@ -534,8 +618,16 @@ static int get_epic_descriptor(struct edgeport_serial *ep)
 		dev_dbg(dev, "  IOSPWriteLCR     : %s\n", bits->IOSPWriteLCR	? "TRUE": "FALSE");
 		dev_dbg(dev, "  IOSPSetBaudRate  : %s\n", bits->IOSPSetBaudRate	? "TRUE": "FALSE");
 		dev_dbg(dev, "  TrueEdgeport     : %s\n", bits->TrueEdgeport	? "TRUE": "FALSE");
+
+		result = 0;
+	} else if (result >= 0) {
+		dev_warn(&serial->interface->dev, "short epic descriptor received: %d\n",
+			 result);
+		result = -EIO;
 	}
 
+	kfree(epic);
+
 	return result;
 }
 
@@ -1560,7 +1652,6 @@ static int get_serial_info(struct edgeport_port *edge_port,
 	tmp.line		= edge_port->port->minor;
 	tmp.port		= edge_port->port->port_number;
 	tmp.irq			= 0;
-	tmp.flags		= ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
 	tmp.xmit_fifo_size	= edge_port->maxTxCredits;
 	tmp.baud_base		= 9600;
 	tmp.close_delay		= 5*HZ;
@@ -2090,8 +2181,7 @@ static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
  * rom_read
  *	reads a number of bytes from the Edgeport device starting at the given
  *	address.
- *	If successful returns the number of bytes read, otherwise it returns
- *	a negative error number of the problem.
+ *	Returns zero on success or a negative error number.
  ****************************************************************************/
 static int rom_read(struct usb_serial *serial, __u16 extAddr,
 					__u16 addr, __u16 length, __u8 *data)
@@ -2116,12 +2206,17 @@ static int rom_read(struct usb_serial *serial, __u16 extAddr,
 					USB_REQUEST_ION_READ_ROM,
 					0xC0, addr, extAddr, transfer_buffer,
 					current_length, 300);
-		if (result < 0)
+		if (result < current_length) {
+			if (result >= 0)
+				result = -EIO;
 			break;
+		}
 		memcpy(data, transfer_buffer, current_length);
 		length -= current_length;
 		addr += current_length;
 		data += current_length;
+
+		result = 0;
 	}
 
 	kfree(transfer_buffer);
@@ -2575,9 +2670,10 @@ static void get_manufacturing_desc(struct edgeport_serial *edge_serial)
 				EDGE_MANUF_DESC_LEN,
 				(__u8 *)(&edge_serial->manuf_descriptor));
 
-	if (response < 1)
-		dev_err(dev, "error in getting manufacturer descriptor\n");
-	else {
+	if (response < 0) {
+		dev_err(dev, "error in getting manufacturer descriptor: %d\n",
+				response);
+	} else {
 		char string[30];
 		dev_dbg(dev, "**Manufacturer Descriptor\n");
 		dev_dbg(dev, "  RomSize:        %dK\n",
@@ -2634,9 +2730,10 @@ static void get_boot_desc(struct edgeport_serial *edge_serial)
 				EDGE_BOOT_DESC_LEN,
 				(__u8 *)(&edge_serial->boot_descriptor));
 
-	if (response < 1)
-		dev_err(dev, "error in getting boot descriptor\n");
-	else {
+	if (response < 0) {
+		dev_err(dev, "error in getting boot descriptor: %d\n",
+				response);
+	} else {
 		dev_dbg(dev, "**Boot Descriptor:\n");
 		dev_dbg(dev, "  BootCodeLength: %d\n",
 			le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength));
@@ -2779,7 +2876,7 @@ static int edge_startup(struct usb_serial *serial)
 	dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name);
 
 	/* Read the epic descriptor */
-	if (get_epic_descriptor(edge_serial) <= 0) {
+	if (get_epic_descriptor(edge_serial) < 0) {
 		/* memcpy descriptor to Supports structures */
 		memcpy(&edge_serial->epic_descriptor.Supports, descriptor,
 		       sizeof(struct edge_compatibility_bits));
@@ -3015,6 +3112,139 @@ static int edge_port_remove(struct usb_serial_port *port)
 	return 0;
 }
 
+static struct usb_serial_driver edgeport_2port_device = {
+	.driver = {
+		.owner		= THIS_MODULE,
+		.name		= "edgeport_2",
+	},
+	.description		= "Edgeport 2 port adapter",
+	.id_table		= edgeport_2port_id_table,
+	.num_ports		= 2,
+	.open			= edge_open,
+	.close			= edge_close,
+	.throttle		= edge_throttle,
+	.unthrottle		= edge_unthrottle,
+	.attach			= edge_startup,
+	.disconnect		= edge_disconnect,
+	.release		= edge_release,
+	.port_probe		= edge_port_probe,
+	.port_remove		= edge_port_remove,
+	.ioctl			= edge_ioctl,
+	.set_termios		= edge_set_termios,
+	.tiocmget		= edge_tiocmget,
+	.tiocmset		= edge_tiocmset,
+	.tiocmiwait		= usb_serial_generic_tiocmiwait,
+	.get_icount		= usb_serial_generic_get_icount,
+	.write			= edge_write,
+	.write_room		= edge_write_room,
+	.chars_in_buffer	= edge_chars_in_buffer,
+	.break_ctl		= edge_break,
+	.read_int_callback	= edge_interrupt_callback,
+	.read_bulk_callback	= edge_bulk_in_callback,
+	.write_bulk_callback	= edge_bulk_out_data_callback,
+};
+
+static struct usb_serial_driver edgeport_4port_device = {
+	.driver = {
+		.owner		= THIS_MODULE,
+		.name		= "edgeport_4",
+	},
+	.description		= "Edgeport 4 port adapter",
+	.id_table		= edgeport_4port_id_table,
+	.num_ports		= 4,
+	.open			= edge_open,
+	.close			= edge_close,
+	.throttle		= edge_throttle,
+	.unthrottle		= edge_unthrottle,
+	.attach			= edge_startup,
+	.disconnect		= edge_disconnect,
+	.release		= edge_release,
+	.port_probe		= edge_port_probe,
+	.port_remove		= edge_port_remove,
+	.ioctl			= edge_ioctl,
+	.set_termios		= edge_set_termios,
+	.tiocmget		= edge_tiocmget,
+	.tiocmset		= edge_tiocmset,
+	.tiocmiwait		= usb_serial_generic_tiocmiwait,
+	.get_icount		= usb_serial_generic_get_icount,
+	.write			= edge_write,
+	.write_room		= edge_write_room,
+	.chars_in_buffer	= edge_chars_in_buffer,
+	.break_ctl		= edge_break,
+	.read_int_callback	= edge_interrupt_callback,
+	.read_bulk_callback	= edge_bulk_in_callback,
+	.write_bulk_callback	= edge_bulk_out_data_callback,
+};
+
+static struct usb_serial_driver edgeport_8port_device = {
+	.driver = {
+		.owner		= THIS_MODULE,
+		.name		= "edgeport_8",
+	},
+	.description		= "Edgeport 8 port adapter",
+	.id_table		= edgeport_8port_id_table,
+	.num_ports		= 8,
+	.open			= edge_open,
+	.close			= edge_close,
+	.throttle		= edge_throttle,
+	.unthrottle		= edge_unthrottle,
+	.attach			= edge_startup,
+	.disconnect		= edge_disconnect,
+	.release		= edge_release,
+	.port_probe		= edge_port_probe,
+	.port_remove		= edge_port_remove,
+	.ioctl			= edge_ioctl,
+	.set_termios		= edge_set_termios,
+	.tiocmget		= edge_tiocmget,
+	.tiocmset		= edge_tiocmset,
+	.tiocmiwait		= usb_serial_generic_tiocmiwait,
+	.get_icount		= usb_serial_generic_get_icount,
+	.write			= edge_write,
+	.write_room		= edge_write_room,
+	.chars_in_buffer	= edge_chars_in_buffer,
+	.break_ctl		= edge_break,
+	.read_int_callback	= edge_interrupt_callback,
+	.read_bulk_callback	= edge_bulk_in_callback,
+	.write_bulk_callback	= edge_bulk_out_data_callback,
+};
+
+static struct usb_serial_driver epic_device = {
+	.driver = {
+		.owner		= THIS_MODULE,
+		.name		= "epic",
+	},
+	.description		= "EPiC device",
+	.id_table		= Epic_port_id_table,
+	.num_ports		= 1,
+	.open			= edge_open,
+	.close			= edge_close,
+	.throttle		= edge_throttle,
+	.unthrottle		= edge_unthrottle,
+	.attach			= edge_startup,
+	.disconnect		= edge_disconnect,
+	.release		= edge_release,
+	.port_probe		= edge_port_probe,
+	.port_remove		= edge_port_remove,
+	.ioctl			= edge_ioctl,
+	.set_termios		= edge_set_termios,
+	.tiocmget		= edge_tiocmget,
+	.tiocmset		= edge_tiocmset,
+	.tiocmiwait		= usb_serial_generic_tiocmiwait,
+	.get_icount		= usb_serial_generic_get_icount,
+	.write			= edge_write,
+	.write_room		= edge_write_room,
+	.chars_in_buffer	= edge_chars_in_buffer,
+	.break_ctl		= edge_break,
+	.read_int_callback	= edge_interrupt_callback,
+	.read_bulk_callback	= edge_bulk_in_callback,
+	.write_bulk_callback	= edge_bulk_out_data_callback,
+};
+
+static struct usb_serial_driver * const serial_drivers[] = {
+	&edgeport_2port_device, &edgeport_4port_device,
+	&edgeport_8port_device, &epic_device, NULL
+};
+
 module_usb_serial_driver(serial_drivers, id_table_combined);
 
 MODULE_AUTHOR(DRIVER_AUTHOR);
diff --git a/drivers/usb/serial/io_tables.h b/drivers/usb/serial/io_tables.h
deleted file mode 100644
index ae5fac5656c9..000000000000
--- a/drivers/usb/serial/io_tables.h
+++ /dev/null
@@ -1,232 +0,0 @@
-/*
- * IO Edgeport Driver tables
- *
- *	Copyright (C) 2001
- *	    Greg Kroah-Hartman (greg@kroah.com)
- *
- *	This program is free software; you can redistribute it and/or modify
- *	it under the terms of the GNU General Public License as published by
- *	the Free Software Foundation; either version 2 of the License, or
- *	(at your option) any later version.
- *
- */
-
-#ifndef IO_TABLES_H
-#define IO_TABLES_H
-
-static const struct usb_device_id edgeport_2port_id_table[] = {
-	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2) },
-	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2I) },
-	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_421) },
-	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_21) },
-	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2_DIN) },
-	{ }
-};
-
-static const struct usb_device_id edgeport_4port_id_table[] = {
-	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4) },
-	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_RAPIDPORT_4) },
-	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4T) },
-	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_MT4X56USB) },
-	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4I) },
-	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU) },
-	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4_DIN) },
-	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_22I) },
-	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_412_4) },
-	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_COMPATIBLE) },
-	{ }
-};
-
-static const struct usb_device_id edgeport_8port_id_table[] = {
-	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8) },
-	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU) },
-	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8I) },
-	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8R) },
-	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8RR) },
-	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_412_8) },
-	{ }
-};
-
-static const struct usb_device_id Epic_port_id_table[] = {
-	{ USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0202) },
-	{ USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0203) },
-	{ USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0310) },
-	{ USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0311) },
-	{ USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0312) },
-	{ USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A758) },
-	{ USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A794) },
-	{ USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A225) },
-	{ }
-};
-
-/* Devices that this driver supports */
-static const struct usb_device_id id_table_combined[] = {
-	{ USB_DEVICE(USB_VENDOR_ID_ION,	ION_DEVICE_ID_EDGEPORT_4) },
-	{ USB_DEVICE(USB_VENDOR_ID_ION,	ION_DEVICE_ID_RAPIDPORT_4) },
-	{ USB_DEVICE(USB_VENDOR_ID_ION,	ION_DEVICE_ID_EDGEPORT_4T) },
-	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_MT4X56USB) },
-	{ USB_DEVICE(USB_VENDOR_ID_ION,	ION_DEVICE_ID_EDGEPORT_2) },
-	{ USB_DEVICE(USB_VENDOR_ID_ION,	ION_DEVICE_ID_EDGEPORT_4I) },
-	{ USB_DEVICE(USB_VENDOR_ID_ION,	ION_DEVICE_ID_EDGEPORT_2I) },
-	{ USB_DEVICE(USB_VENDOR_ID_ION,	ION_DEVICE_ID_EDGEPORT_421) },
-	{ USB_DEVICE(USB_VENDOR_ID_ION,	ION_DEVICE_ID_EDGEPORT_21) },
-	{ USB_DEVICE(USB_VENDOR_ID_ION,	ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU) },
-	{ USB_DEVICE(USB_VENDOR_ID_ION,	ION_DEVICE_ID_EDGEPORT_8) },
-	{ USB_DEVICE(USB_VENDOR_ID_ION,	ION_DEVICE_ID_EDGEPORT_2_DIN) },
-	{ USB_DEVICE(USB_VENDOR_ID_ION,	ION_DEVICE_ID_EDGEPORT_4_DIN) },
-	{ USB_DEVICE(USB_VENDOR_ID_ION,	ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU) },
-	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_22I) },
-	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_412_4) },
-	{ USB_DEVICE(USB_VENDOR_ID_ION,	ION_DEVICE_ID_EDGEPORT_COMPATIBLE) },
-	{ USB_DEVICE(USB_VENDOR_ID_ION,	ION_DEVICE_ID_EDGEPORT_8I) },
-	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8R) },
-	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8RR) },
-	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_412_8) },
-	{ USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0202) },
-	{ USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0203) },
-	{ USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0310) },
-	{ USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0311) },
-	{ USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0312) },
-	{ USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A758) },
-	{ USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A794) },
-	{ USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A225) },
-	{ } /* Terminating entry */
-};
-
-MODULE_DEVICE_TABLE(usb, id_table_combined);
-
-static struct usb_serial_driver edgeport_2port_device = {
-	.driver = {
-		.owner		= THIS_MODULE,
-		.name		= "edgeport_2",
-	},
-	.description		= "Edgeport 2 port adapter",
-	.id_table		= edgeport_2port_id_table,
-	.num_ports		= 2,
-	.open			= edge_open,
-	.close			= edge_close,
-	.throttle		= edge_throttle,
-	.unthrottle		= edge_unthrottle,
-	.attach			= edge_startup,
-	.disconnect		= edge_disconnect,
-	.release		= edge_release,
-	.port_probe		= edge_port_probe,
-	.port_remove		= edge_port_remove,
-	.ioctl			= edge_ioctl,
-	.set_termios		= edge_set_termios,
-	.tiocmget		= edge_tiocmget,
-	.tiocmset		= edge_tiocmset,
-	.tiocmiwait		= usb_serial_generic_tiocmiwait,
-	.get_icount		= usb_serial_generic_get_icount,
-	.write			= edge_write,
-	.write_room		= edge_write_room,
-	.chars_in_buffer	= edge_chars_in_buffer,
-	.break_ctl		= edge_break,
-	.read_int_callback	= edge_interrupt_callback,
-	.read_bulk_callback	= edge_bulk_in_callback,
-	.write_bulk_callback	= edge_bulk_out_data_callback,
-};
-
-static struct usb_serial_driver edgeport_4port_device = {
-	.driver = {
-		.owner		= THIS_MODULE,
-		.name		= "edgeport_4",
-	},
-	.description		= "Edgeport 4 port adapter",
-	.id_table		= edgeport_4port_id_table,
-	.num_ports		= 4,
-	.open			= edge_open,
-	.close			= edge_close,
-	.throttle		= edge_throttle,
-	.unthrottle		= edge_unthrottle,
-	.attach			= edge_startup,
-	.disconnect		= edge_disconnect,
-	.release		= edge_release,
-	.port_probe		= edge_port_probe,
-	.port_remove		= edge_port_remove,
-	.ioctl			= edge_ioctl,
-	.set_termios		= edge_set_termios,
-	.tiocmget		= edge_tiocmget,
-	.tiocmset		= edge_tiocmset,
-	.tiocmiwait		= usb_serial_generic_tiocmiwait,
-	.get_icount		= usb_serial_generic_get_icount,
-	.write			= edge_write,
-	.write_room		= edge_write_room,
-	.chars_in_buffer	= edge_chars_in_buffer,
-	.break_ctl		= edge_break,
-	.read_int_callback	= edge_interrupt_callback,
-	.read_bulk_callback	= edge_bulk_in_callback,
-	.write_bulk_callback	= edge_bulk_out_data_callback,
-};
-
-static struct usb_serial_driver edgeport_8port_device = {
-	.driver = {
-		.owner		= THIS_MODULE,
-		.name		= "edgeport_8",
-	},
-	.description		= "Edgeport 8 port adapter",
-	.id_table		= edgeport_8port_id_table,
-	.num_ports		= 8,
-	.open			= edge_open,
-	.close			= edge_close,
-	.throttle		= edge_throttle,
-	.unthrottle		= edge_unthrottle,
-	.attach			= edge_startup,
-	.disconnect		= edge_disconnect,
-	.release		= edge_release,
-	.port_probe		= edge_port_probe,
-	.port_remove		= edge_port_remove,
-	.ioctl			= edge_ioctl,
-	.set_termios		= edge_set_termios,
-	.tiocmget		= edge_tiocmget,
-	.tiocmset		= edge_tiocmset,
-	.tiocmiwait		= usb_serial_generic_tiocmiwait,
-	.get_icount		= usb_serial_generic_get_icount,
-	.write			= edge_write,
-	.write_room		= edge_write_room,
-	.chars_in_buffer	= edge_chars_in_buffer,
-	.break_ctl		= edge_break,
-	.read_int_callback	= edge_interrupt_callback,
-	.read_bulk_callback	= edge_bulk_in_callback,
-	.write_bulk_callback	= edge_bulk_out_data_callback,
-};
-
-static struct usb_serial_driver epic_device = {
-	.driver = {
-		.owner		= THIS_MODULE,
-		.name		= "epic",
-	},
-	.description		= "EPiC device",
-	.id_table		= Epic_port_id_table,
-	.num_ports		= 1,
-	.open			= edge_open,
-	.close			= edge_close,
-	.throttle		= edge_throttle,
-	.unthrottle		= edge_unthrottle,
-	.attach			= edge_startup,
-	.disconnect		= edge_disconnect,
-	.release		= edge_release,
-	.port_probe		= edge_port_probe,
-	.port_remove		= edge_port_remove,
-	.ioctl			= edge_ioctl,
-	.set_termios		= edge_set_termios,
-	.tiocmget		= edge_tiocmget,
-	.tiocmset		= edge_tiocmset,
-	.tiocmiwait		= usb_serial_generic_tiocmiwait,
-	.get_icount		= usb_serial_generic_get_icount,
-	.write			= edge_write,
-	.write_room		= edge_write_room,
-	.chars_in_buffer	= edge_chars_in_buffer,
-	.break_ctl		= edge_break,
-	.read_int_callback	= edge_interrupt_callback,
-	.read_bulk_callback	= edge_bulk_in_callback,
-	.write_bulk_callback	= edge_bulk_out_data_callback,
-};
-
-static struct usb_serial_driver * const serial_drivers[] = {
-	&edgeport_2port_device, &edgeport_4port_device,
-	&edgeport_8port_device, &epic_device, NULL
-};
-
-#endif
-
diff --git a/drivers/usb/serial/io_ti.c b/drivers/usb/serial/io_ti.c
index 9a0db2965fbb..ceaeebaa6f90 100644
--- a/drivers/usb/serial/io_ti.c
+++ b/drivers/usb/serial/io_ti.c
@@ -2468,7 +2468,6 @@ static int get_serial_info(struct edgeport_port *edge_port,
 	tmp.line		= edge_port->port->minor;
 	tmp.port		= edge_port->port->port_number;
 	tmp.irq			= 0;
-	tmp.flags		= ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
 	tmp.xmit_fifo_size	= edge_port->port->bulk_out_size;
 	tmp.baud_base		= 9600;
 	tmp.close_delay		= 5*HZ;
diff --git a/drivers/usb/serial/iuu_phoenix.c b/drivers/usb/serial/iuu_phoenix.c
index d57fb5199218..030390f37b0a 100644
--- a/drivers/usb/serial/iuu_phoenix.c
+++ b/drivers/usb/serial/iuu_phoenix.c
@@ -976,7 +976,6 @@ static int iuu_open(struct tty_struct *tty, struct usb_serial_port *port)
 {
 	struct usb_serial *serial = port->serial;
 	struct device *dev = &port->dev;
-	u8 *buf;
 	int result;
 	int baud;
 	u32 actual;
@@ -991,20 +990,8 @@ static int iuu_open(struct tty_struct *tty, struct usb_serial_port *port)
 	usb_clear_halt(serial->dev, port->write_urb->pipe);
 	usb_clear_halt(serial->dev, port->read_urb->pipe);
 
-	buf = kmalloc(10, GFP_KERNEL);
-	if (buf == NULL)
-		return -ENOMEM;
-
 	priv->poll = 0;
 
-	/* initialize writebuf */
-#define FISH(a, b, c, d) do { \
-	result = usb_control_msg(port->serial->dev,	\
-				usb_rcvctrlpipe(port->serial->dev, 0),	\
-				b, a, c, d, buf, 1, 1000); \
-	dev_dbg(dev, "0x%x:0x%x:0x%x:0x%x  %d - %x\n", a, b, c, d, result, \
-				buf[0]); } while (0);
-
 #define SOUP(a, b, c, d)  do { \
 	result = usb_control_msg(port->serial->dev,	\
 				usb_sndctrlpipe(port->serial->dev, 0),	\
@@ -1017,7 +1004,7 @@ static int iuu_open(struct tty_struct *tty, struct usb_serial_port *port)
 	/* sprintf(buf ,"%c%c%c%c",0x03,0x02,0x02,0x0); */
 
 	SOUP(0x03, 0x02, 0x02, 0x0);
-	kfree(buf);
+
 	iuu_led(port, 0xF000, 0xF000, 0, 0xFF);
 	iuu_uart_on(port);
 	if (boost < 100)
diff --git a/drivers/usb/serial/keyspan.c b/drivers/usb/serial/keyspan.c
index 1f9414bdd649..5662d324edd2 100644
--- a/drivers/usb/serial/keyspan.c
+++ b/drivers/usb/serial/keyspan.c
@@ -41,11 +41,508 @@
 #include <linux/usb.h>
 #include <linux/usb/serial.h>
 #include <linux/usb/ezusb.h>
-#include "keyspan.h"
 
 #define DRIVER_AUTHOR "Hugh Blemings <hugh@misc.nu"
 #define DRIVER_DESC "Keyspan USB to Serial Converter Driver"
 
+/* Function prototypes for Keyspan serial converter */
+static int keyspan_open(struct tty_struct *tty, struct usb_serial_port *port);
+static void keyspan_close(struct usb_serial_port *port);
+static void keyspan_dtr_rts(struct usb_serial_port *port, int on);
+static int keyspan_startup(struct usb_serial *serial);
+static void keyspan_disconnect(struct usb_serial *serial);
+static void keyspan_release(struct usb_serial *serial);
+static int keyspan_port_probe(struct usb_serial_port *port);
+static int keyspan_port_remove(struct usb_serial_port *port);
+static int keyspan_write_room(struct tty_struct *tty);
+static int keyspan_write(struct tty_struct *tty, struct usb_serial_port *port,
+			 const unsigned char *buf, int count);
+static void keyspan_send_setup(struct usb_serial_port *port, int reset_port);
+static void keyspan_set_termios(struct tty_struct *tty,
+				struct usb_serial_port *port,
+				struct ktermios *old);
+static void keyspan_break_ctl(struct tty_struct *tty, int break_state);
+static int keyspan_tiocmget(struct tty_struct *tty);
+static int keyspan_tiocmset(struct tty_struct *tty, unsigned int set,
+			    unsigned int clear);
+static int keyspan_fake_startup(struct usb_serial *serial);
+
+static int keyspan_usa19_calc_baud(struct usb_serial_port *port,
+				   u32 baud_rate, u32 baudclk,
+				   u8 *rate_hi, u8 *rate_low,
+				   u8 *prescaler, int portnum);
+static int keyspan_usa19w_calc_baud(struct usb_serial_port *port,
+				    u32 baud_rate, u32 baudclk,
+				    u8 *rate_hi, u8 *rate_low,
+				    u8 *prescaler, int portnum);
+static int keyspan_usa28_calc_baud(struct usb_serial_port *port,
+				   u32 baud_rate, u32 baudclk,
+				   u8 *rate_hi, u8 *rate_low,
+				   u8 *prescaler, int portnum);
+static int keyspan_usa19hs_calc_baud(struct usb_serial_port *port,
+				     u32 baud_rate, u32 baudclk,
+				     u8 *rate_hi, u8 *rate_low,
+				     u8 *prescaler, int portnum);
+
+static int keyspan_usa28_send_setup(struct usb_serial *serial,
+				    struct usb_serial_port *port,
+				    int reset_port);
+static int keyspan_usa26_send_setup(struct usb_serial *serial,
+				    struct usb_serial_port *port,
+				    int reset_port);
+static int keyspan_usa49_send_setup(struct usb_serial *serial,
+				    struct usb_serial_port *port,
+				    int reset_port);
+static int keyspan_usa90_send_setup(struct usb_serial *serial,
+				    struct usb_serial_port *port,
+				    int reset_port);
+static int keyspan_usa67_send_setup(struct usb_serial *serial,
+				    struct usb_serial_port *port,
+				    int reset_port);
+
+/* Values used for baud rate calculation - device specific */
+#define KEYSPAN_INVALID_BAUD_RATE		(-1)
+#define KEYSPAN_BAUD_RATE_OK			(0)
+#define KEYSPAN_USA18X_BAUDCLK			(12000000L)	/* a guess */
+#define KEYSPAN_USA19_BAUDCLK			(12000000L)
+#define KEYSPAN_USA19W_BAUDCLK			(24000000L)
+#define KEYSPAN_USA19HS_BAUDCLK			(14769231L)
+#define KEYSPAN_USA28_BAUDCLK			(1843200L)
+#define KEYSPAN_USA28X_BAUDCLK			(12000000L)
+#define KEYSPAN_USA49W_BAUDCLK			(48000000L)
+
+/* Some constants used to characterise each device.  */
+#define KEYSPAN_MAX_NUM_PORTS			(4)
+#define KEYSPAN_MAX_FLIPS			(2)
+
+/*
+ * Device info for the Keyspan serial converter, used by the overall
+ * usb-serial probe function.
+ */
+#define KEYSPAN_VENDOR_ID			(0x06cd)
+
+/* Product IDs for the products supported, pre-renumeration */
+#define keyspan_usa18x_pre_product_id		0x0105
+#define keyspan_usa19_pre_product_id		0x0103
+#define keyspan_usa19qi_pre_product_id		0x010b
+#define keyspan_mpr_pre_product_id		0x011b
+#define keyspan_usa19qw_pre_product_id		0x0118
+#define keyspan_usa19w_pre_product_id		0x0106
+#define keyspan_usa28_pre_product_id		0x0101
+#define keyspan_usa28x_pre_product_id		0x0102
+#define keyspan_usa28xa_pre_product_id		0x0114
+#define keyspan_usa28xb_pre_product_id		0x0113
+#define keyspan_usa49w_pre_product_id		0x0109
+#define keyspan_usa49wlc_pre_product_id		0x011a
+
+/*
+ * Product IDs post-renumeration.  Note that the 28x and 28xb have the same
+ * id's post-renumeration but behave identically so it's not an issue. As
+ * such, the 28xb is not listed in any of the device tables.
+ */
+#define keyspan_usa18x_product_id		0x0112
+#define keyspan_usa19_product_id		0x0107
+#define keyspan_usa19qi_product_id		0x010c
+#define keyspan_usa19hs_product_id		0x0121
+#define keyspan_mpr_product_id			0x011c
+#define keyspan_usa19qw_product_id		0x0119
+#define keyspan_usa19w_product_id		0x0108
+#define keyspan_usa28_product_id		0x010f
+#define keyspan_usa28x_product_id		0x0110
+#define keyspan_usa28xa_product_id		0x0115
+#define keyspan_usa28xb_product_id		0x0110
+#define keyspan_usa28xg_product_id		0x0135
+#define keyspan_usa49w_product_id		0x010a
+#define keyspan_usa49wlc_product_id		0x012a
+#define keyspan_usa49wg_product_id		0x0131
+
+struct keyspan_device_details {
+	/* product ID value */
+	int	product_id;
+
+	enum	{msg_usa26, msg_usa28, msg_usa49, msg_usa90, msg_usa67} msg_format;
+
+		/* Number of physical ports */
+	int	num_ports;
+
+		/* 1 if endpoint flipping used on input, 0 if not */
+	int	indat_endp_flip;
+
+		/* 1 if endpoint flipping used on output, 0 if not */
+	int	outdat_endp_flip;
+
+		/*
+		 * Table mapping input data endpoint IDs to physical port
+		 * number and flip if used
+		 */
+	int	indat_endpoints[KEYSPAN_MAX_NUM_PORTS];
+
+		/* Same for output endpoints */
+	int	outdat_endpoints[KEYSPAN_MAX_NUM_PORTS];
+
+		/* Input acknowledge endpoints */
+	int	inack_endpoints[KEYSPAN_MAX_NUM_PORTS];
+
+		/* Output control endpoints */
+	int	outcont_endpoints[KEYSPAN_MAX_NUM_PORTS];
+
+		/* Endpoint used for input status */
+	int	instat_endpoint;
+
+		/* Endpoint used for input data 49WG only */
+	int	indat_endpoint;
+
+		/* Endpoint used for global control functions */
+	int	glocont_endpoint;
+
+	int	(*calculate_baud_rate)(struct usb_serial_port *port,
+				       u32 baud_rate, u32 baudclk,
+				       u8 *rate_hi, u8 *rate_low, u8 *prescaler,
+				       int portnum);
+	u32	baudclk;
+};
+
+/*
+ * Now for each device type we setup the device detail structure with the
+ * appropriate information (provided in Keyspan's documentation)
+ */
+
+static const struct keyspan_device_details usa18x_device_details = {
+	.product_id		= keyspan_usa18x_product_id,
+	.msg_format		= msg_usa26,
+	.num_ports		= 1,
+	.indat_endp_flip	= 0,
+	.outdat_endp_flip	= 1,
+	.indat_endpoints	= {0x81},
+	.outdat_endpoints	= {0x01},
+	.inack_endpoints	= {0x85},
+	.outcont_endpoints	= {0x05},
+	.instat_endpoint	= 0x87,
+	.indat_endpoint		= -1,
+	.glocont_endpoint	= 0x07,
+	.calculate_baud_rate	= keyspan_usa19w_calc_baud,
+	.baudclk		= KEYSPAN_USA18X_BAUDCLK,
+};
+
+static const struct keyspan_device_details usa19_device_details = {
+	.product_id		= keyspan_usa19_product_id,
+	.msg_format		= msg_usa28,
+	.num_ports		= 1,
+	.indat_endp_flip	= 1,
+	.outdat_endp_flip	= 1,
+	.indat_endpoints	= {0x81},
+	.outdat_endpoints	= {0x01},
+	.inack_endpoints	= {0x83},
+	.outcont_endpoints	= {0x03},
+	.instat_endpoint	= 0x84,
+	.indat_endpoint		= -1,
+	.glocont_endpoint	= -1,
+	.calculate_baud_rate	= keyspan_usa19_calc_baud,
+	.baudclk		= KEYSPAN_USA19_BAUDCLK,
+};
+
+static const struct keyspan_device_details usa19qi_device_details = {
+	.product_id		= keyspan_usa19qi_product_id,
+	.msg_format		= msg_usa28,
+	.num_ports		= 1,
+	.indat_endp_flip	= 1,
+	.outdat_endp_flip	= 1,
+	.indat_endpoints	= {0x81},
+	.outdat_endpoints	= {0x01},
+	.inack_endpoints	= {0x83},
+	.outcont_endpoints	= {0x03},
+	.instat_endpoint	= 0x84,
+	.indat_endpoint		= -1,
+	.glocont_endpoint	= -1,
+	.calculate_baud_rate	= keyspan_usa28_calc_baud,
+	.baudclk		= KEYSPAN_USA19_BAUDCLK,
+};
+
+static const struct keyspan_device_details mpr_device_details = {
+	.product_id		= keyspan_mpr_product_id,
+	.msg_format		= msg_usa28,
+	.num_ports		= 1,
+	.indat_endp_flip	= 1,
+	.outdat_endp_flip	= 1,
+	.indat_endpoints	= {0x81},
+	.outdat_endpoints	= {0x01},
+	.inack_endpoints	= {0x83},
+	.outcont_endpoints	= {0x03},
+	.instat_endpoint	= 0x84,
+	.indat_endpoint		= -1,
+	.glocont_endpoint	= -1,
+	.calculate_baud_rate	= keyspan_usa28_calc_baud,
+	.baudclk		= KEYSPAN_USA19_BAUDCLK,
+};
+
+static const struct keyspan_device_details usa19qw_device_details = {
+	.product_id		= keyspan_usa19qw_product_id,
+	.msg_format		= msg_usa26,
+	.num_ports		= 1,
+	.indat_endp_flip	= 0,
+	.outdat_endp_flip	= 1,
+	.indat_endpoints	= {0x81},
+	.outdat_endpoints	= {0x01},
+	.inack_endpoints	= {0x85},
+	.outcont_endpoints	= {0x05},
+	.instat_endpoint	= 0x87,
+	.indat_endpoint		= -1,
+	.glocont_endpoint	= 0x07,
+	.calculate_baud_rate	= keyspan_usa19w_calc_baud,
+	.baudclk		= KEYSPAN_USA19W_BAUDCLK,
+};
+
+static const struct keyspan_device_details usa19w_device_details = {
+	.product_id		= keyspan_usa19w_product_id,
+	.msg_format		= msg_usa26,
+	.num_ports		= 1,
+	.indat_endp_flip	= 0,
+	.outdat_endp_flip	= 1,
+	.indat_endpoints	= {0x81},
+	.outdat_endpoints	= {0x01},
+	.inack_endpoints	= {0x85},
+	.outcont_endpoints	= {0x05},
+	.instat_endpoint	= 0x87,
+	.indat_endpoint		= -1,
+	.glocont_endpoint	= 0x07,
+	.calculate_baud_rate	= keyspan_usa19w_calc_baud,
+	.baudclk		= KEYSPAN_USA19W_BAUDCLK,
+};
+
+static const struct keyspan_device_details usa19hs_device_details = {
+	.product_id		= keyspan_usa19hs_product_id,
+	.msg_format		= msg_usa90,
+	.num_ports		= 1,
+	.indat_endp_flip	= 0,
+	.outdat_endp_flip	= 0,
+	.indat_endpoints	= {0x81},
+	.outdat_endpoints	= {0x01},
+	.inack_endpoints	= {-1},
+	.outcont_endpoints	= {0x02},
+	.instat_endpoint	= 0x82,
+	.indat_endpoint		= -1,
+	.glocont_endpoint	= -1,
+	.calculate_baud_rate	= keyspan_usa19hs_calc_baud,
+	.baudclk		= KEYSPAN_USA19HS_BAUDCLK,
+};
+
+static const struct keyspan_device_details usa28_device_details = {
+	.product_id		= keyspan_usa28_product_id,
+	.msg_format		= msg_usa28,
+	.num_ports		= 2,
+	.indat_endp_flip	= 1,
+	.outdat_endp_flip	= 1,
+	.indat_endpoints	= {0x81, 0x83},
+	.outdat_endpoints	= {0x01, 0x03},
+	.inack_endpoints	= {0x85, 0x86},
+	.outcont_endpoints	= {0x05, 0x06},
+	.instat_endpoint	= 0x87,
+	.indat_endpoint		= -1,
+	.glocont_endpoint	= 0x07,
+	.calculate_baud_rate	= keyspan_usa28_calc_baud,
+	.baudclk		= KEYSPAN_USA28_BAUDCLK,
+};
+
+static const struct keyspan_device_details usa28x_device_details = {
+	.product_id		= keyspan_usa28x_product_id,
+	.msg_format		= msg_usa26,
+	.num_ports		= 2,
+	.indat_endp_flip	= 0,
+	.outdat_endp_flip	= 1,
+	.indat_endpoints	= {0x81, 0x83},
+	.outdat_endpoints	= {0x01, 0x03},
+	.inack_endpoints	= {0x85, 0x86},
+	.outcont_endpoints	= {0x05, 0x06},
+	.instat_endpoint	= 0x87,
+	.indat_endpoint		= -1,
+	.glocont_endpoint	= 0x07,
+	.calculate_baud_rate	= keyspan_usa19w_calc_baud,
+	.baudclk		= KEYSPAN_USA28X_BAUDCLK,
+};
+
+static const struct keyspan_device_details usa28xa_device_details = {
+	.product_id		= keyspan_usa28xa_product_id,
+	.msg_format		= msg_usa26,
+	.num_ports		= 2,
+	.indat_endp_flip	= 0,
+	.outdat_endp_flip	= 1,
+	.indat_endpoints	= {0x81, 0x83},
+	.outdat_endpoints	= {0x01, 0x03},
+	.inack_endpoints	= {0x85, 0x86},
+	.outcont_endpoints	= {0x05, 0x06},
+	.instat_endpoint	= 0x87,
+	.indat_endpoint		= -1,
+	.glocont_endpoint	= 0x07,
+	.calculate_baud_rate	= keyspan_usa19w_calc_baud,
+	.baudclk		= KEYSPAN_USA28X_BAUDCLK,
+};
+
+static const struct keyspan_device_details usa28xg_device_details = {
+	.product_id		= keyspan_usa28xg_product_id,
+	.msg_format		= msg_usa67,
+	.num_ports		= 2,
+	.indat_endp_flip	= 0,
+	.outdat_endp_flip	= 0,
+	.indat_endpoints	= {0x84, 0x88},
+	.outdat_endpoints	= {0x02, 0x06},
+	.inack_endpoints	= {-1, -1},
+	.outcont_endpoints	= {-1, -1},
+	.instat_endpoint	= 0x81,
+	.indat_endpoint		= -1,
+	.glocont_endpoint	= 0x01,
+	.calculate_baud_rate	= keyspan_usa19w_calc_baud,
+	.baudclk		= KEYSPAN_USA28X_BAUDCLK,
+};
+/*
+ * We don't need a separate entry for the usa28xb as it appears as a 28x
+ * anyway.
+ */
+
+static const struct keyspan_device_details usa49w_device_details = {
+	.product_id		= keyspan_usa49w_product_id,
+	.msg_format		= msg_usa49,
+	.num_ports		= 4,
+	.indat_endp_flip	= 0,
+	.outdat_endp_flip	= 0,
+	.indat_endpoints	= {0x81, 0x82, 0x83, 0x84},
+	.outdat_endpoints	= {0x01, 0x02, 0x03, 0x04},
+	.inack_endpoints	= {-1, -1, -1, -1},
+	.outcont_endpoints	= {-1, -1, -1, -1},
+	.instat_endpoint	= 0x87,
+	.indat_endpoint		= -1,
+	.glocont_endpoint	= 0x07,
+	.calculate_baud_rate	= keyspan_usa19w_calc_baud,
+	.baudclk		= KEYSPAN_USA49W_BAUDCLK,
+};
+
+static const struct keyspan_device_details usa49wlc_device_details = {
+	.product_id		= keyspan_usa49wlc_product_id,
+	.msg_format		= msg_usa49,
+	.num_ports		= 4,
+	.indat_endp_flip	= 0,
+	.outdat_endp_flip	= 0,
+	.indat_endpoints	= {0x81, 0x82, 0x83, 0x84},
+	.outdat_endpoints	= {0x01, 0x02, 0x03, 0x04},
+	.inack_endpoints	= {-1, -1, -1, -1},
+	.outcont_endpoints	= {-1, -1, -1, -1},
+	.instat_endpoint	= 0x87,
+	.indat_endpoint		= -1,
+	.glocont_endpoint	= 0x07,
+	.calculate_baud_rate	= keyspan_usa19w_calc_baud,
+	.baudclk		= KEYSPAN_USA19W_BAUDCLK,
+};
+
+static const struct keyspan_device_details usa49wg_device_details = {
+	.product_id		= keyspan_usa49wg_product_id,
+	.msg_format		= msg_usa49,
+	.num_ports		= 4,
+	.indat_endp_flip	= 0,
+	.outdat_endp_flip	= 0,
+	.indat_endpoints	= {-1, -1, -1, -1},	/* single 'global' data in EP */
+	.outdat_endpoints	= {0x01, 0x02, 0x04, 0x06},
+	.inack_endpoints	= {-1, -1, -1, -1},
+	.outcont_endpoints	= {-1, -1, -1, -1},
+	.instat_endpoint	= 0x81,
+	.indat_endpoint		= 0x88,
+	.glocont_endpoint	= 0x00,			/* uses control EP */
+	.calculate_baud_rate	= keyspan_usa19w_calc_baud,
+	.baudclk		= KEYSPAN_USA19W_BAUDCLK,
+};
+
+static const struct keyspan_device_details *keyspan_devices[] = {
+	&usa18x_device_details,
+	&usa19_device_details,
+	&usa19qi_device_details,
+	&mpr_device_details,
+	&usa19qw_device_details,
+	&usa19w_device_details,
+	&usa19hs_device_details,
+	&usa28_device_details,
+	&usa28x_device_details,
+	&usa28xa_device_details,
+	&usa28xg_device_details,
+	/* 28xb not required as it renumerates as a 28x */
+	&usa49w_device_details,
+	&usa49wlc_device_details,
+	&usa49wg_device_details,
+	NULL,
+};
+
+static const struct usb_device_id keyspan_ids_combined[] = {
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa18x_pre_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa19_pre_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa19w_pre_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa19qi_pre_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa19qw_pre_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_mpr_pre_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa28_pre_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa28x_pre_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa28xa_pre_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa28xb_pre_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa49w_pre_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa49wlc_pre_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa18x_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa19_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa19w_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa19qi_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa19qw_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa19hs_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_mpr_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa28_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa28x_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa28xa_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa28xg_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa49w_product_id)},
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa49wlc_product_id)},
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa49wg_product_id)},
+	{ } /* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE(usb, keyspan_ids_combined);
+
+/* usb_device_id table for the pre-firmware download keyspan devices */
+static const struct usb_device_id keyspan_pre_ids[] = {
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa18x_pre_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa19_pre_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa19qi_pre_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa19qw_pre_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa19w_pre_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_mpr_pre_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa28_pre_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa28x_pre_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa28xa_pre_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa28xb_pre_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa49w_pre_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa49wlc_pre_product_id) },
+	{ } /* Terminating entry */
+};
+
+static const struct usb_device_id keyspan_1port_ids[] = {
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa18x_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa19_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa19qi_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa19qw_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa19w_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa19hs_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_mpr_product_id) },
+	{ } /* Terminating entry */
+};
+
+static const struct usb_device_id keyspan_2port_ids[] = {
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa28_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa28x_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa28xa_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa28xg_product_id) },
+	{ } /* Terminating entry */
+};
+
+static const struct usb_device_id keyspan_4port_ids[] = {
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa49w_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa49wlc_product_id)},
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa49wg_product_id)},
+	{ } /* Terminating entry */
+};
+
 #define INSTAT_BUFLEN	32
 #define GLOCONT_BUFLEN	64
 #define INDAT49W_BUFLEN	512
@@ -126,8 +623,6 @@ struct keyspan_port_private {
 #include "keyspan_usa67msg.h"
 
 
-module_usb_serial_driver(serial_drivers, keyspan_ids_combined);
-
 static void keyspan_break_ctl(struct tty_struct *tty, int break_state)
 {
 	struct usb_serial_port *port = tty->driver_data;
@@ -2523,6 +3018,97 @@ static int keyspan_port_remove(struct usb_serial_port *port)
 	return 0;
 }
 
+/* Structs for the devices, pre and post renumeration. */
+static struct usb_serial_driver keyspan_pre_device = {
+	.driver = {
+		.owner		= THIS_MODULE,
+		.name		= "keyspan_no_firm",
+	},
+	.description		= "Keyspan - (without firmware)",
+	.id_table		= keyspan_pre_ids,
+	.num_ports		= 1,
+	.attach			= keyspan_fake_startup,
+};
+
+static struct usb_serial_driver keyspan_1port_device = {
+	.driver = {
+		.owner		= THIS_MODULE,
+		.name		= "keyspan_1",
+	},
+	.description		= "Keyspan 1 port adapter",
+	.id_table		= keyspan_1port_ids,
+	.num_ports		= 1,
+	.open			= keyspan_open,
+	.close			= keyspan_close,
+	.dtr_rts		= keyspan_dtr_rts,
+	.write			= keyspan_write,
+	.write_room		= keyspan_write_room,
+	.set_termios		= keyspan_set_termios,
+	.break_ctl		= keyspan_break_ctl,
+	.tiocmget		= keyspan_tiocmget,
+	.tiocmset		= keyspan_tiocmset,
+	.attach			= keyspan_startup,
+	.disconnect		= keyspan_disconnect,
+	.release		= keyspan_release,
+	.port_probe		= keyspan_port_probe,
+	.port_remove		= keyspan_port_remove,
+};
+
+static struct usb_serial_driver keyspan_2port_device = {
+	.driver = {
+		.owner		= THIS_MODULE,
+		.name		= "keyspan_2",
+	},
+	.description		= "Keyspan 2 port adapter",
+	.id_table		= keyspan_2port_ids,
+	.num_ports		= 2,
+	.open			= keyspan_open,
+	.close			= keyspan_close,
+	.dtr_rts		= keyspan_dtr_rts,
+	.write			= keyspan_write,
+	.write_room		= keyspan_write_room,
+	.set_termios		= keyspan_set_termios,
+	.break_ctl		= keyspan_break_ctl,
+	.tiocmget		= keyspan_tiocmget,
+	.tiocmset		= keyspan_tiocmset,
+	.attach			= keyspan_startup,
+	.disconnect		= keyspan_disconnect,
+	.release		= keyspan_release,
+	.port_probe		= keyspan_port_probe,
+	.port_remove		= keyspan_port_remove,
+};
+
+static struct usb_serial_driver keyspan_4port_device = {
+	.driver = {
+		.owner		= THIS_MODULE,
+		.name		= "keyspan_4",
+	},
+	.description		= "Keyspan 4 port adapter",
+	.id_table		= keyspan_4port_ids,
+	.num_ports		= 4,
+	.open			= keyspan_open,
+	.close			= keyspan_close,
+	.dtr_rts		= keyspan_dtr_rts,
+	.write			= keyspan_write,
+	.write_room		= keyspan_write_room,
+	.set_termios		= keyspan_set_termios,
+	.break_ctl		= keyspan_break_ctl,
+	.tiocmget		= keyspan_tiocmget,
+	.tiocmset		= keyspan_tiocmset,
+	.attach			= keyspan_startup,
+	.disconnect		= keyspan_disconnect,
+	.release		= keyspan_release,
+	.port_probe		= keyspan_port_probe,
+	.port_remove		= keyspan_port_remove,
+};
+
+static struct usb_serial_driver * const serial_drivers[] = {
+	&keyspan_pre_device, &keyspan_1port_device,
+	&keyspan_2port_device, &keyspan_4port_device, NULL
+};
+
+module_usb_serial_driver(serial_drivers, keyspan_ids_combined);
+
 MODULE_AUTHOR(DRIVER_AUTHOR);
 MODULE_DESCRIPTION(DRIVER_DESC);
 MODULE_LICENSE("GPL");
diff --git a/drivers/usb/serial/keyspan.h b/drivers/usb/serial/keyspan.h
deleted file mode 100644
index 0273dda303a4..000000000000
--- a/drivers/usb/serial/keyspan.h
+++ /dev/null
@@ -1,629 +0,0 @@
-/*
-  Keyspan USB to Serial Converter driver
- 
-  (C) Copyright (C) 2000-2001
-      Hugh Blemings <hugh@blemings.org>
-   
-  This program is free software; you can redistribute it and/or modify
-  it under the terms of the GNU General Public License as published by
-  the Free Software Foundation; either version 2 of the License, or
-  (at your option) any later version.
-
-  See http://blemings.org/hugh/keyspan.html for more information.
-  
-  Code in this driver inspired by and in a number of places taken
-  from Brian Warner's original Keyspan-PDA driver.
-
-  This driver has been put together with the support of Innosys, Inc.
-  and Keyspan, Inc the manufacturers of the Keyspan USB-serial products.
-  Thanks Guys :)
-  
-  Thanks to Paulus for miscellaneous tidy ups, some largish chunks
-  of much nicer and/or completely new code and (perhaps most uniquely)
-  having the patience to sit down and explain why and where he'd changed
-  stuff.
-
-  Tip 'o the hat to IBM (and previously Linuxcare :) for supporting 
-  staff in their work on open source projects.
-  
-  See keyspan.c for update history.
-
-*/
-
-#ifndef __LINUX_USB_SERIAL_KEYSPAN_H
-#define __LINUX_USB_SERIAL_KEYSPAN_H
-
-
-/* Function prototypes for Keyspan serial converter */
-static int  keyspan_open		(struct tty_struct *tty,
-					 struct usb_serial_port *port);
-static void keyspan_close		(struct usb_serial_port *port);
-static void keyspan_dtr_rts		(struct usb_serial_port *port, int on);
-static int  keyspan_startup		(struct usb_serial *serial);
-static void keyspan_disconnect		(struct usb_serial *serial);
-static void keyspan_release		(struct usb_serial *serial);
-static int keyspan_port_probe(struct usb_serial_port *port);
-static int keyspan_port_remove(struct usb_serial_port *port);
-static int  keyspan_write_room		(struct tty_struct *tty);
-
-static int  keyspan_write		(struct tty_struct *tty,
-					 struct usb_serial_port *port,
-					 const unsigned char *buf,
-					 int count);
-
-static void keyspan_send_setup		(struct usb_serial_port *port,
-					 int reset_port);
-
-
-static void keyspan_set_termios		(struct tty_struct *tty,
-					 struct usb_serial_port *port,
-					 struct ktermios *old);
-static void keyspan_break_ctl		(struct tty_struct *tty,
-					 int break_state);
-static int  keyspan_tiocmget		(struct tty_struct *tty);
-static int  keyspan_tiocmset		(struct tty_struct *tty,
-					 unsigned int set,
-					 unsigned int clear);
-static int  keyspan_fake_startup	(struct usb_serial *serial);
-
-static int  keyspan_usa19_calc_baud	(struct usb_serial_port *port,
-					 u32 baud_rate, u32 baudclk,
-					 u8 *rate_hi, u8 *rate_low,
-					 u8 *prescaler, int portnum);
-
-static int  keyspan_usa19w_calc_baud	(struct usb_serial_port *port,
-					 u32 baud_rate, u32 baudclk,
-					 u8 *rate_hi, u8 *rate_low,
-					 u8 *prescaler, int portnum);
-
-static int  keyspan_usa28_calc_baud	(struct usb_serial_port *port,
-					 u32 baud_rate, u32 baudclk,
-					 u8 *rate_hi, u8 *rate_low,
-					 u8 *prescaler, int portnum);
-
-static int  keyspan_usa19hs_calc_baud	(struct usb_serial_port *port,
-					 u32 baud_rate, u32 baudclk,
-					 u8 *rate_hi, u8 *rate_low,
-					 u8 *prescaler, int portnum);
-
-static int  keyspan_usa28_send_setup	(struct usb_serial *serial,
-					 struct usb_serial_port *port,
-					 int reset_port);
-static int  keyspan_usa26_send_setup	(struct usb_serial *serial,
-	       				 struct usb_serial_port *port,
-					 int reset_port);
-static int  keyspan_usa49_send_setup	(struct usb_serial *serial,
-					 struct usb_serial_port *port,
-					 int reset_port);
-
-static int  keyspan_usa90_send_setup	(struct usb_serial *serial,
-					 struct usb_serial_port *port,
-					 int reset_port);
-
-static int  keyspan_usa67_send_setup	(struct usb_serial *serial,
-					 struct usb_serial_port *port,
-					 int reset_port);
-
-/* Values used for baud rate calculation - device specific */
-#define	KEYSPAN_INVALID_BAUD_RATE		(-1)
-#define	KEYSPAN_BAUD_RATE_OK			(0)
-#define	KEYSPAN_USA18X_BAUDCLK			(12000000L)	/* a guess */
-#define	KEYSPAN_USA19_BAUDCLK			(12000000L)
-#define	KEYSPAN_USA19W_BAUDCLK			(24000000L)
-#define	KEYSPAN_USA19HS_BAUDCLK			(14769231L)
-#define	KEYSPAN_USA28_BAUDCLK			(1843200L)
-#define	KEYSPAN_USA28X_BAUDCLK			(12000000L)
-#define	KEYSPAN_USA49W_BAUDCLK			(48000000L)
-
-/* Some constants used to characterise each device.  */
-#define		KEYSPAN_MAX_NUM_PORTS		(4)
-#define		KEYSPAN_MAX_FLIPS		(2)
-
-/* Device info for the Keyspan serial converter, used
-   by the overall usb-serial probe function */
-#define KEYSPAN_VENDOR_ID			(0x06cd)
-
-/* Product IDs for the products supported, pre-renumeration */
-#define	keyspan_usa18x_pre_product_id		0x0105
-#define	keyspan_usa19_pre_product_id		0x0103
-#define	keyspan_usa19qi_pre_product_id		0x010b
-#define	keyspan_mpr_pre_product_id		0x011b
-#define	keyspan_usa19qw_pre_product_id		0x0118
-#define	keyspan_usa19w_pre_product_id		0x0106
-#define	keyspan_usa28_pre_product_id		0x0101
-#define	keyspan_usa28x_pre_product_id		0x0102
-#define	keyspan_usa28xa_pre_product_id		0x0114
-#define	keyspan_usa28xb_pre_product_id		0x0113
-#define	keyspan_usa49w_pre_product_id		0x0109
-#define	keyspan_usa49wlc_pre_product_id		0x011a
-
-/* Product IDs post-renumeration.  Note that the 28x and 28xb
-   have the same id's post-renumeration but behave identically
-   so it's not an issue. As such, the 28xb is not listed in any
-   of the device tables. */
-#define	keyspan_usa18x_product_id		0x0112
-#define	keyspan_usa19_product_id		0x0107
-#define	keyspan_usa19qi_product_id		0x010c
-#define	keyspan_usa19hs_product_id		0x0121
-#define	keyspan_mpr_product_id			0x011c
-#define	keyspan_usa19qw_product_id		0x0119
-#define	keyspan_usa19w_product_id		0x0108
-#define	keyspan_usa28_product_id		0x010f
-#define	keyspan_usa28x_product_id		0x0110
-#define	keyspan_usa28xa_product_id		0x0115
-#define	keyspan_usa28xb_product_id		0x0110
-#define	keyspan_usa28xg_product_id		0x0135
-#define	keyspan_usa49w_product_id		0x010a
-#define	keyspan_usa49wlc_product_id		0x012a
-#define	keyspan_usa49wg_product_id		0x0131
-
-struct keyspan_device_details {
-	/* product ID value */
-	int	product_id;
-
-	enum	{msg_usa26, msg_usa28, msg_usa49, msg_usa90, msg_usa67} msg_format;
-
-		/* Number of physical ports */
-	int	num_ports;
-
-		/* 1 if endpoint flipping used on input, 0 if not */
-	int	indat_endp_flip;
-
-		/* 1 if endpoint flipping used on output, 0 if not */
-	int 	outdat_endp_flip;
-
-		/* Table mapping input data endpoint IDs to physical
-		   port number and flip if used */
-	int	indat_endpoints[KEYSPAN_MAX_NUM_PORTS];
-
-		/* Same for output endpoints */
-	int	outdat_endpoints[KEYSPAN_MAX_NUM_PORTS];
-
-		/* Input acknowledge endpoints */
-	int	inack_endpoints[KEYSPAN_MAX_NUM_PORTS];
-
-		/* Output control endpoints */
-	int	outcont_endpoints[KEYSPAN_MAX_NUM_PORTS];
-
-		/* Endpoint used for input status */
-	int	instat_endpoint;
-
-		/* Endpoint used for input data 49WG only */
-	int	indat_endpoint;
-
-		/* Endpoint used for global control functions */
-	int	glocont_endpoint;
-
-	int	(*calculate_baud_rate) (struct usb_serial_port *port,
-					u32 baud_rate, u32 baudclk,
-					u8 *rate_hi, u8 *rate_low, u8 *prescaler, int portnum);
-	u32	baudclk;
-}; 
-
-/* Now for each device type we setup the device detail
-   structure with the appropriate information (provided
-   in Keyspan's documentation) */
-
-static const struct keyspan_device_details usa18x_device_details = {
-	.product_id		= keyspan_usa18x_product_id,
-	.msg_format		= msg_usa26,
-	.num_ports		= 1,
-	.indat_endp_flip	= 0,
-	.outdat_endp_flip	= 1,
-	.indat_endpoints	= {0x81},
-	.outdat_endpoints	= {0x01},
-	.inack_endpoints	= {0x85},
-	.outcont_endpoints	= {0x05},
-	.instat_endpoint	= 0x87,
-	.indat_endpoint		= -1,
-	.glocont_endpoint	= 0x07,
-	.calculate_baud_rate	= keyspan_usa19w_calc_baud,
-	.baudclk		= KEYSPAN_USA18X_BAUDCLK,
-};
-
-static const struct keyspan_device_details usa19_device_details = {
-	.product_id		= keyspan_usa19_product_id,
-	.msg_format		= msg_usa28,
-	.num_ports		= 1,
-	.indat_endp_flip	= 1,
-	.outdat_endp_flip	= 1,
-	.indat_endpoints	= {0x81},
-	.outdat_endpoints	= {0x01},
-	.inack_endpoints	= {0x83},
-	.outcont_endpoints	= {0x03},
-	.instat_endpoint	= 0x84,
-	.indat_endpoint		= -1,
-	.glocont_endpoint	= -1,
-	.calculate_baud_rate	= keyspan_usa19_calc_baud,
-	.baudclk		= KEYSPAN_USA19_BAUDCLK,
-};
-
-static const struct keyspan_device_details usa19qi_device_details = {
-	.product_id		= keyspan_usa19qi_product_id,
-	.msg_format		= msg_usa28,
-	.num_ports		= 1,
-	.indat_endp_flip	= 1,
-	.outdat_endp_flip	= 1,
-	.indat_endpoints	= {0x81},
-	.outdat_endpoints	= {0x01},
-	.inack_endpoints	= {0x83},
-	.outcont_endpoints	= {0x03},
-	.instat_endpoint	= 0x84,
-	.indat_endpoint		= -1,
-	.glocont_endpoint	= -1,
-	.calculate_baud_rate	= keyspan_usa28_calc_baud,
-	.baudclk		= KEYSPAN_USA19_BAUDCLK,
-};
-
-static const struct keyspan_device_details mpr_device_details = {
-	.product_id		= keyspan_mpr_product_id,
-	.msg_format		= msg_usa28,
-	.num_ports		= 1,
-	.indat_endp_flip	= 1,
-	.outdat_endp_flip	= 1,
-	.indat_endpoints	= {0x81},
-	.outdat_endpoints	= {0x01},
-	.inack_endpoints	= {0x83},
-	.outcont_endpoints	= {0x03},
-	.instat_endpoint	= 0x84,
-	.indat_endpoint		= -1,
-	.glocont_endpoint	= -1,
-	.calculate_baud_rate	= keyspan_usa28_calc_baud,
-	.baudclk		= KEYSPAN_USA19_BAUDCLK,
-};
-
-static const struct keyspan_device_details usa19qw_device_details = {
-	.product_id		= keyspan_usa19qw_product_id,
-	.msg_format		= msg_usa26,
-	.num_ports		= 1,
-	.indat_endp_flip	= 0,
-	.outdat_endp_flip	= 1,
-	.indat_endpoints	= {0x81},
-	.outdat_endpoints	= {0x01},
-	.inack_endpoints	= {0x85},
-	.outcont_endpoints	= {0x05},
-	.instat_endpoint	= 0x87,
-	.indat_endpoint		= -1,
-	.glocont_endpoint	= 0x07,
-	.calculate_baud_rate	= keyspan_usa19w_calc_baud,
-	.baudclk		= KEYSPAN_USA19W_BAUDCLK,
-};
-
-static const struct keyspan_device_details usa19w_device_details = {
-	.product_id		= keyspan_usa19w_product_id,
-	.msg_format		= msg_usa26,
-	.num_ports		= 1,
-	.indat_endp_flip	= 0,
-	.outdat_endp_flip	= 1,
-	.indat_endpoints	= {0x81},
-	.outdat_endpoints	= {0x01},
-	.inack_endpoints	= {0x85},
-	.outcont_endpoints	= {0x05},
-	.instat_endpoint	= 0x87,
-	.indat_endpoint		= -1,
-	.glocont_endpoint	= 0x07,
-	.calculate_baud_rate	= keyspan_usa19w_calc_baud,
-	.baudclk		= KEYSPAN_USA19W_BAUDCLK,
-};
-
-static const struct keyspan_device_details usa19hs_device_details = {
-	.product_id		= keyspan_usa19hs_product_id,
-	.msg_format		= msg_usa90,
-	.num_ports		= 1,
-	.indat_endp_flip	= 0,
-	.outdat_endp_flip	= 0,
-	.indat_endpoints	= {0x81},
-	.outdat_endpoints	= {0x01},
-	.inack_endpoints	= {-1},
-	.outcont_endpoints	= {0x02},
-	.instat_endpoint	= 0x82,
-	.indat_endpoint		= -1,
-	.glocont_endpoint	= -1,
-	.calculate_baud_rate	= keyspan_usa19hs_calc_baud,
-	.baudclk		= KEYSPAN_USA19HS_BAUDCLK,
-};
-
-static const struct keyspan_device_details usa28_device_details = {
-	.product_id		= keyspan_usa28_product_id,
-	.msg_format		= msg_usa28,
-	.num_ports		= 2,
-	.indat_endp_flip	= 1,
-	.outdat_endp_flip	= 1,
-	.indat_endpoints	= {0x81, 0x83},
-	.outdat_endpoints	= {0x01, 0x03},
-	.inack_endpoints	= {0x85, 0x86},
-	.outcont_endpoints	= {0x05, 0x06},
-	.instat_endpoint	= 0x87,
-	.indat_endpoint		= -1,
-	.glocont_endpoint	= 0x07,
-	.calculate_baud_rate	= keyspan_usa28_calc_baud,
-	.baudclk		= KEYSPAN_USA28_BAUDCLK,		
-};
-
-static const struct keyspan_device_details usa28x_device_details = {
-	.product_id		= keyspan_usa28x_product_id,
-	.msg_format		= msg_usa26,
-	.num_ports		= 2,
-	.indat_endp_flip	= 0,
-	.outdat_endp_flip	= 1,
-	.indat_endpoints	= {0x81, 0x83},
-	.outdat_endpoints	= {0x01, 0x03},
-	.inack_endpoints	= {0x85, 0x86},
-	.outcont_endpoints	= {0x05, 0x06},
-	.instat_endpoint	= 0x87,
-	.indat_endpoint		= -1,
-	.glocont_endpoint	= 0x07,
-	.calculate_baud_rate	= keyspan_usa19w_calc_baud,
-	.baudclk		= KEYSPAN_USA28X_BAUDCLK,
-};
-
-static const struct keyspan_device_details usa28xa_device_details = {
-	.product_id		= keyspan_usa28xa_product_id,
-	.msg_format		= msg_usa26,
-	.num_ports		= 2,
-	.indat_endp_flip	= 0,
-	.outdat_endp_flip	= 1,
-	.indat_endpoints	= {0x81, 0x83},
-	.outdat_endpoints	= {0x01, 0x03},
-	.inack_endpoints	= {0x85, 0x86},
-	.outcont_endpoints	= {0x05, 0x06},
-	.instat_endpoint	= 0x87,
-	.indat_endpoint		= -1,
-	.glocont_endpoint	= 0x07,
-	.calculate_baud_rate	= keyspan_usa19w_calc_baud,
-	.baudclk		= KEYSPAN_USA28X_BAUDCLK,
-};
-
-static const struct keyspan_device_details usa28xg_device_details = {
-	.product_id		= keyspan_usa28xg_product_id,
-	.msg_format		= msg_usa67,
-	.num_ports		= 2,
-	.indat_endp_flip	= 0,
-	.outdat_endp_flip	= 0,
-	.indat_endpoints	= {0x84, 0x88},
-	.outdat_endpoints	= {0x02, 0x06},
-	.inack_endpoints	= {-1, -1},
-	.outcont_endpoints	= {-1, -1},
-	.instat_endpoint	= 0x81,
-	.indat_endpoint		= -1,
-	.glocont_endpoint	= 0x01,
-	.calculate_baud_rate	= keyspan_usa19w_calc_baud,
-	.baudclk		= KEYSPAN_USA28X_BAUDCLK,
-};
-/* We don't need a separate entry for the usa28xb as it appears as a 28x anyway */
-
-static const struct keyspan_device_details usa49w_device_details = {
-	.product_id		= keyspan_usa49w_product_id,
-	.msg_format		= msg_usa49,
-	.num_ports		= 4,
-	.indat_endp_flip	= 0,
-	.outdat_endp_flip	= 0,
-	.indat_endpoints	= {0x81, 0x82, 0x83, 0x84},
-	.outdat_endpoints	= {0x01, 0x02, 0x03, 0x04},
-	.inack_endpoints	= {-1, -1, -1, -1},
-	.outcont_endpoints	= {-1, -1, -1, -1},
-	.instat_endpoint	= 0x87,
-	.indat_endpoint		= -1,
-	.glocont_endpoint	= 0x07,
-	.calculate_baud_rate	= keyspan_usa19w_calc_baud,
-	.baudclk		= KEYSPAN_USA49W_BAUDCLK,
-};
-
-static const struct keyspan_device_details usa49wlc_device_details = {
-	.product_id		= keyspan_usa49wlc_product_id,
-	.msg_format		= msg_usa49,
-	.num_ports		= 4,
-	.indat_endp_flip	= 0,
-	.outdat_endp_flip	= 0,
-	.indat_endpoints	= {0x81, 0x82, 0x83, 0x84},
-	.outdat_endpoints	= {0x01, 0x02, 0x03, 0x04},
-	.inack_endpoints	= {-1, -1, -1, -1},
-	.outcont_endpoints	= {-1, -1, -1, -1},
-	.instat_endpoint	= 0x87,
-	.indat_endpoint		= -1,
-	.glocont_endpoint	= 0x07,
-	.calculate_baud_rate	= keyspan_usa19w_calc_baud,
-	.baudclk		= KEYSPAN_USA19W_BAUDCLK,
-};
-
-static const struct keyspan_device_details usa49wg_device_details = {
-	.product_id		= keyspan_usa49wg_product_id,
-	.msg_format		= msg_usa49,
-	.num_ports		= 4,
-	.indat_endp_flip	= 0,
-	.outdat_endp_flip	= 0,
-	.indat_endpoints	= {-1, -1, -1, -1},		/* single 'global' data in EP */
-	.outdat_endpoints	= {0x01, 0x02, 0x04, 0x06},
-	.inack_endpoints	= {-1, -1, -1, -1},
-	.outcont_endpoints	= {-1, -1, -1, -1},
-	.instat_endpoint	= 0x81,
-	.indat_endpoint		= 0x88,
-	.glocont_endpoint	= 0x00,				/* uses control EP */
-	.calculate_baud_rate	= keyspan_usa19w_calc_baud,
-	.baudclk		= KEYSPAN_USA19W_BAUDCLK,
-};
-
-static const struct keyspan_device_details *keyspan_devices[] = {
-	&usa18x_device_details,
-	&usa19_device_details,
-	&usa19qi_device_details,
-	&mpr_device_details,
-	&usa19qw_device_details,
-	&usa19w_device_details,
-	&usa19hs_device_details,
-	&usa28_device_details,
-	&usa28x_device_details,
-	&usa28xa_device_details,
-	&usa28xg_device_details,
-	/* 28xb not required as it renumerates as a 28x */
-	&usa49w_device_details,
-	&usa49wlc_device_details,
-	&usa49wg_device_details,
-	NULL,
-};
-
-static const struct usb_device_id keyspan_ids_combined[] = {
-	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa18x_pre_product_id) },
-	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa19_pre_product_id) },
-	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa19w_pre_product_id) },
-	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa19qi_pre_product_id) },
-	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa19qw_pre_product_id) },
-	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_mpr_pre_product_id) },
-	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa28_pre_product_id) },
-	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa28x_pre_product_id) },
-	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa28xa_pre_product_id) },
-	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa28xb_pre_product_id) },
-	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa49w_pre_product_id) },
-	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa49wlc_pre_product_id) },
-	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa18x_product_id) },
-	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa19_product_id) },
-	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa19w_product_id) },
-	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa19qi_product_id) },
-	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa19qw_product_id) },
-	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa19hs_product_id) },
-	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_mpr_product_id) },
-	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa28_product_id) },
-	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa28x_product_id) },
-	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa28xa_product_id) },
-	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa28xg_product_id) },
-	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa49w_product_id)},
-	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa49wlc_product_id)},
-	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa49wg_product_id)},
-	{ } /* Terminating entry */
-};
-
-MODULE_DEVICE_TABLE(usb, keyspan_ids_combined);
-
-/* usb_device_id table for the pre-firmware download keyspan devices */
-static const struct usb_device_id keyspan_pre_ids[] = {
-	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa18x_pre_product_id) },
-	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa19_pre_product_id) },
-	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa19qi_pre_product_id) },
-	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa19qw_pre_product_id) },
-	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa19w_pre_product_id) },
-	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_mpr_pre_product_id) },
-	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa28_pre_product_id) },
-	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa28x_pre_product_id) },
-	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa28xa_pre_product_id) },
-	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa28xb_pre_product_id) },
-	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa49w_pre_product_id) },
-	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa49wlc_pre_product_id) },
-	{ } /* Terminating entry */
-};
-
-static const struct usb_device_id keyspan_1port_ids[] = {
-	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa18x_product_id) },
-	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa19_product_id) },
-	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa19qi_product_id) },
-	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa19qw_product_id) },
-	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa19w_product_id) },
-	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa19hs_product_id) },
-	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_mpr_product_id) },
-	{ } /* Terminating entry */
-};
-
-static const struct usb_device_id keyspan_2port_ids[] = {
-	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa28_product_id) },
-	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa28x_product_id) },
-	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa28xa_product_id) },
-	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa28xg_product_id) },
-	{ } /* Terminating entry */
-};
-
-static const struct usb_device_id keyspan_4port_ids[] = {
-	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa49w_product_id) },
-	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa49wlc_product_id)},
-	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa49wg_product_id)},
-	{ } /* Terminating entry */
-};
-
-/* Structs for the devices, pre and post renumeration. */
-static struct usb_serial_driver keyspan_pre_device = {
-	.driver = {
-		.owner		= THIS_MODULE,
-		.name		= "keyspan_no_firm",
-	},
-	.description		= "Keyspan - (without firmware)",
-	.id_table		= keyspan_pre_ids,
-	.num_ports		= 1,
-	.attach			= keyspan_fake_startup,
-};
-
-static struct usb_serial_driver keyspan_1port_device = {
-	.driver = {
-		.owner		= THIS_MODULE,
-		.name		= "keyspan_1",
-	},
-	.description		= "Keyspan 1 port adapter",
-	.id_table		= keyspan_1port_ids,
-	.num_ports		= 1,
-	.open			= keyspan_open,
-	.close			= keyspan_close,
-	.dtr_rts		= keyspan_dtr_rts,
-	.write			= keyspan_write,
-	.write_room		= keyspan_write_room,
-	.set_termios		= keyspan_set_termios,
-	.break_ctl		= keyspan_break_ctl,
-	.tiocmget		= keyspan_tiocmget,
-	.tiocmset		= keyspan_tiocmset,
-	.attach			= keyspan_startup,
-	.disconnect		= keyspan_disconnect,
-	.release		= keyspan_release,
-	.port_probe		= keyspan_port_probe,
-	.port_remove		= keyspan_port_remove,
-};
-
-static struct usb_serial_driver keyspan_2port_device = {
-	.driver = {
-		.owner		= THIS_MODULE,
-		.name		= "keyspan_2",
-	},
-	.description		= "Keyspan 2 port adapter",
-	.id_table		= keyspan_2port_ids,
-	.num_ports		= 2,
-	.open			= keyspan_open,
-	.close			= keyspan_close,
-	.dtr_rts		= keyspan_dtr_rts,
-	.write			= keyspan_write,
-	.write_room		= keyspan_write_room,
-	.set_termios		= keyspan_set_termios,
-	.break_ctl		= keyspan_break_ctl,
-	.tiocmget		= keyspan_tiocmget,
-	.tiocmset		= keyspan_tiocmset,
-	.attach			= keyspan_startup,
-	.disconnect		= keyspan_disconnect,
-	.release		= keyspan_release,
-	.port_probe		= keyspan_port_probe,
-	.port_remove		= keyspan_port_remove,
-};
-
-static struct usb_serial_driver keyspan_4port_device = {
-	.driver = {
-		.owner		= THIS_MODULE,
-		.name		= "keyspan_4",
-	},
-	.description		= "Keyspan 4 port adapter",
-	.id_table		= keyspan_4port_ids,
-	.num_ports		= 4,
-	.open			= keyspan_open,
-	.close			= keyspan_close,
-	.dtr_rts		= keyspan_dtr_rts,
-	.write			= keyspan_write,
-	.write_room		= keyspan_write_room,
-	.set_termios		= keyspan_set_termios,
-	.break_ctl		= keyspan_break_ctl,
-	.tiocmget		= keyspan_tiocmget,
-	.tiocmset		= keyspan_tiocmset,
-	.attach			= keyspan_startup,
-	.disconnect		= keyspan_disconnect,
-	.release		= keyspan_release,
-	.port_probe		= keyspan_port_probe,
-	.port_remove		= keyspan_port_remove,
-};
-
-static struct usb_serial_driver * const serial_drivers[] = {
-	&keyspan_pre_device, &keyspan_1port_device,
-	&keyspan_2port_device, &keyspan_4port_device, NULL
-};
-
-#endif
diff --git a/drivers/usb/serial/keyspan_pda.c b/drivers/usb/serial/keyspan_pda.c
index 83523fcf6fb9..d2dab2a341b8 100644
--- a/drivers/usb/serial/keyspan_pda.c
+++ b/drivers/usb/serial/keyspan_pda.c
@@ -139,6 +139,7 @@ static void keyspan_pda_rx_interrupt(struct urb *urb)
 {
 	struct usb_serial_port *port = urb->context;
 	unsigned char *data = urb->transfer_buffer;
+	unsigned int len = urb->actual_length;
 	int retval;
 	int status = urb->status;
 	struct keyspan_pda_private *priv;
@@ -159,18 +160,26 @@ static void keyspan_pda_rx_interrupt(struct urb *urb)
 		goto exit;
 	}
 
+	if (len < 1) {
+		dev_warn(&port->dev, "short message received\n");
+		goto exit;
+	}
+
 	/* see if the message is data or a status interrupt */
 	switch (data[0]) {
 	case 0:
 		 /* rest of message is rx data */
-		if (urb->actual_length) {
-			tty_insert_flip_string(&port->port, data + 1,
-						urb->actual_length - 1);
-			tty_flip_buffer_push(&port->port);
-		}
+		if (len < 2)
+			break;
+		tty_insert_flip_string(&port->port, data + 1, len - 1);
+		tty_flip_buffer_push(&port->port);
 		break;
 	case 1:
 		/* status interrupt */
+		if (len < 3) {
+			dev_warn(&port->dev, "short interrupt message received\n");
+			break;
+		}
 		dev_dbg(&port->dev, "rx int, d1=%d, d2=%d\n", data[1], data[2]);
 		switch (data[1]) {
 		case 1: /* modemline change */
diff --git a/drivers/usb/serial/kl5kusb105.c b/drivers/usb/serial/kl5kusb105.c
index 6cb45757818f..595415e59d5d 100644
--- a/drivers/usb/serial/kl5kusb105.c
+++ b/drivers/usb/serial/kl5kusb105.c
@@ -89,7 +89,6 @@ static struct usb_serial_driver kl5kusb105d_device = {
 	.open =			klsi_105_open,
 	.close =		klsi_105_close,
 	.set_termios =		klsi_105_set_termios,
-	/*.break_ctl =		klsi_105_break_ctl,*/
 	.tiocmget =		klsi_105_tiocmget,
 	.port_probe =		klsi_105_port_probe,
 	.port_remove =		klsi_105_port_remove,
@@ -104,16 +103,15 @@ static struct usb_serial_driver * const serial_drivers[] = {
 };
 
 struct klsi_105_port_settings {
-	__u8	pktlen;		/* always 5, it seems */
-	__u8	baudrate;
-	__u8	databits;
-	__u8	unknown1;
-	__u8	unknown2;
-} __attribute__ ((packed));
+	u8	pktlen;		/* always 5, it seems */
+	u8	baudrate;
+	u8	databits;
+	u8	unknown1;
+	u8	unknown2;
+};
 
 struct klsi_105_private {
 	struct klsi_105_port_settings	cfg;
-	struct ktermios			termios;
 	unsigned long			line_state; /* modem line settings */
 	spinlock_t			lock;
 };
@@ -143,10 +141,12 @@ static int klsi_105_chg_port_settings(struct usb_serial_port *port,
 	if (rc < 0)
 		dev_err(&port->dev,
 			"Change port settings failed (error = %d)\n", rc);
-	dev_info(&port->serial->dev->dev,
-		 "%d byte block, baudrate %x, databits %d, u1 %d, u2 %d\n",
-		 settings->pktlen, settings->baudrate, settings->databits,
-		 settings->unknown1, settings->unknown2);
+
+	dev_dbg(&port->dev,
+		"pktlen %u, baudrate 0x%02x, databits %u, u1 %u, u2 %u\n",
+		settings->pktlen, settings->baudrate, settings->databits,
+		settings->unknown1, settings->unknown2);
+
 	return rc;
 }
 
@@ -175,8 +175,6 @@ static int klsi_105_get_line_state(struct usb_serial_port *port,
 	u8 *status_buf;
 	__u16 status;
 
-	dev_info(&port->serial->dev->dev, "sending SIO Poll request\n");
-
 	status_buf = kmalloc(KLSI_STATUSBUF_LEN, GFP_KERNEL);
 	if (!status_buf)
 		return -ENOMEM;
@@ -199,8 +197,8 @@ static int klsi_105_get_line_state(struct usb_serial_port *port,
 	} else {
 		status = get_unaligned_le16(status_buf);
 
-		dev_info(&port->serial->dev->dev, "read status %x %x\n",
-			 status_buf[0], status_buf[1]);
+		dev_dbg(&port->dev, "read status %02x %02x\n",
+			status_buf[0], status_buf[1]);
 
 		*line_state_p = klsi_105_status2linestate(status);
 	}
@@ -233,8 +231,6 @@ static int klsi_105_port_probe(struct usb_serial_port *port)
 
 	spin_lock_init(&priv->lock);
 
-	/* priv->termios is left uninitialized until port opening */
-
 	usb_set_serial_port_data(port, priv);
 
 	return 0;
@@ -255,7 +251,6 @@ static int  klsi_105_open(struct tty_struct *tty, struct usb_serial_port *port)
 	struct klsi_105_private *priv = usb_get_serial_port_data(port);
 	int retval = 0;
 	int rc;
-	int i;
 	unsigned long line_state;
 	struct klsi_105_port_settings *cfg;
 	unsigned long flags;
@@ -278,14 +273,7 @@ static int  klsi_105_open(struct tty_struct *tty, struct usb_serial_port *port)
 	cfg->unknown2 = 1;
 	klsi_105_chg_port_settings(port, cfg);
 
-	/* set up termios structure */
 	spin_lock_irqsave(&priv->lock, flags);
-	priv->termios.c_iflag = tty->termios.c_iflag;
-	priv->termios.c_oflag = tty->termios.c_oflag;
-	priv->termios.c_cflag = tty->termios.c_cflag;
-	priv->termios.c_lflag = tty->termios.c_lflag;
-	for (i = 0; i < NCCS; i++)
-		priv->termios.c_cc[i] = tty->termios.c_cc[i];
 	priv->cfg.pktlen   = cfg->pktlen;
 	priv->cfg.baudrate = cfg->baudrate;
 	priv->cfg.databits = cfg->databits;
@@ -438,19 +426,6 @@ static void klsi_105_set_termios(struct tty_struct *tty,
 	 */
 	baud = tty_get_baud_rate(tty);
 
-	if ((cflag & CBAUD) != (old_cflag & CBAUD)) {
-		/* reassert DTR and (maybe) RTS on transition from B0 */
-		if ((old_cflag & CBAUD) == B0) {
-			dev_dbg(dev, "%s: baud was B0\n", __func__);
-#if 0
-			priv->control_state |= TIOCM_DTR;
-			/* don't set RTS if using hardware flow control */
-			if (!(old_cflag & CRTSCTS))
-				priv->control_state |= TIOCM_RTS;
-			mct_u232_set_modem_ctrl(serial, priv->control_state);
-#endif
-		}
-	}
 	switch (baud) {
 	case 0: /* handled below */
 		break;
@@ -484,17 +459,14 @@ static void klsi_105_set_termios(struct tty_struct *tty,
 		baud = 9600;
 		break;
 	}
-	if ((cflag & CBAUD) == B0) {
-		dev_dbg(dev, "%s: baud is B0\n", __func__);
-		/* Drop RTS and DTR */
-		/* maybe this should be simulated by sending read
-		 * disable and read enable messages?
-		 */
-#if 0
-		priv->control_state &= ~(TIOCM_DTR | TIOCM_RTS);
-		mct_u232_set_modem_ctrl(serial, priv->control_state);
-#endif
-	}
+
+	/*
+	 * FIXME: implement B0 handling
+	 *
+	 * Maybe this should be simulated by sending read disable and read
+	 * enable messages?
+	 */
+
 	tty_encode_baud_rate(tty, baud, baud);
 
 	if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
@@ -528,22 +500,6 @@ static void klsi_105_set_termios(struct tty_struct *tty,
 	    || (cflag & CSTOPB) != (old_cflag & CSTOPB)) {
 		/* Not currently supported */
 		tty->termios.c_cflag &= ~(PARENB|PARODD|CSTOPB);
-#if 0
-		priv->last_lcr = 0;
-
-		/* set the parity */
-		if (cflag & PARENB)
-			priv->last_lcr |= (cflag & PARODD) ?
-				MCT_U232_PARITY_ODD : MCT_U232_PARITY_EVEN;
-		else
-			priv->last_lcr |= MCT_U232_PARITY_NONE;
-
-		/* set the number of stop bits */
-		priv->last_lcr |= (cflag & CSTOPB) ?
-			MCT_U232_STOP_BITS_2 : MCT_U232_STOP_BITS_1;
-
-		mct_u232_set_line_ctrl(serial, priv->last_lcr);
-#endif
 	}
 	/*
 	 * Set flow control: well, I do not really now how to handle DTR/RTS.
@@ -554,14 +510,6 @@ static void klsi_105_set_termios(struct tty_struct *tty,
 	    ||  (cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
 		/* Not currently supported */
 		tty->termios.c_cflag &= ~CRTSCTS;
-		/* Drop DTR/RTS if no flow control otherwise assert */
-#if 0
-		if ((iflag & IXOFF) || (iflag & IXON) || (cflag & CRTSCTS))
-			priv->control_state |= TIOCM_DTR | TIOCM_RTS;
-		else
-			priv->control_state &= ~(TIOCM_DTR | TIOCM_RTS);
-		mct_u232_set_modem_ctrl(serial, priv->control_state);
-#endif
 	}
 	memcpy(cfg, &priv->cfg, sizeof(*cfg));
 	spin_unlock_irqrestore(&priv->lock, flags);
@@ -572,25 +520,6 @@ err:
 	kfree(cfg);
 }
 
-#if 0
-static void mct_u232_break_ctl(struct tty_struct *tty, int break_state)
-{
-	struct usb_serial_port *port = tty->driver_data;
-	struct usb_serial *serial = port->serial;
-	struct mct_u232_private *priv =
-				(struct mct_u232_private *)port->private;
-	unsigned char lcr = priv->last_lcr;
-
-	dev_dbg(&port->dev, "%s - state=%d\n", __func__, break_state);
-
-	/* LOCKING */
-	if (break_state)
-		lcr |= MCT_U232_SET_BREAK;
-
-	mct_u232_set_line_ctrl(serial, lcr);
-}
-#endif
-
 static int klsi_105_tiocmget(struct tty_struct *tty)
 {
 	struct usb_serial_port *port = tty->driver_data;
diff --git a/drivers/usb/serial/mct_u232.c b/drivers/usb/serial/mct_u232.c
index 885655315de1..edbc81f205c2 100644
--- a/drivers/usb/serial/mct_u232.c
+++ b/drivers/usb/serial/mct_u232.c
@@ -322,8 +322,12 @@ static int mct_u232_get_modem_stat(struct usb_serial_port *port,
 			MCT_U232_GET_REQUEST_TYPE,
 			0, 0, buf, MCT_U232_GET_MODEM_STAT_SIZE,
 			WDR_TIMEOUT);
-	if (rc < 0) {
+	if (rc < MCT_U232_GET_MODEM_STAT_SIZE) {
 		dev_err(&port->dev, "Get MODEM STATus failed (error = %d)\n", rc);
+
+		if (rc >= 0)
+			rc = -EIO;
+
 		*msr = 0;
 	} else {
 		*msr = buf[0];
diff --git a/drivers/usb/serial/metro-usb.c b/drivers/usb/serial/metro-usb.c
index 39e683096e94..cc84da8dbb84 100644
--- a/drivers/usb/serial/metro-usb.c
+++ b/drivers/usb/serial/metro-usb.c
@@ -135,23 +135,8 @@ static void metrousb_read_int_callback(struct urb *urb)
 	throttled = metro_priv->throttled;
 	spin_unlock_irqrestore(&metro_priv->lock, flags);
 
-	/* Continue trying to read if set. */
-	if (!throttled) {
-		usb_fill_int_urb(port->interrupt_in_urb, port->serial->dev,
-				 usb_rcvintpipe(port->serial->dev, port->interrupt_in_endpointAddress),
-				 port->interrupt_in_urb->transfer_buffer,
-				 port->interrupt_in_urb->transfer_buffer_length,
-				 metrousb_read_int_callback, port, 1);
-
-		result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC);
-
-		if (result)
-			dev_err(&port->dev,
-				"%s - failed submitting interrupt in urb, error code=%d\n",
-				__func__, result);
-	}
-	return;
-
+	if (throttled)
+		return;
 exit:
 	/* Try to resubmit the urb. */
 	result = usb_submit_urb(urb, GFP_ATOMIC);
@@ -161,19 +146,8 @@ exit:
 			__func__, result);
 }
 
-static void metrousb_write_int_callback(struct urb *urb)
-{
-	struct usb_serial_port *port = urb->context;
-
-	dev_warn(&port->dev, "%s not implemented yet.\n",
-		__func__);
-}
-
 static void metrousb_cleanup(struct usb_serial_port *port)
 {
-	dev_dbg(&port->dev, "%s\n", __func__);
-
-	usb_unlink_urb(port->interrupt_in_urb);
 	usb_kill_urb(port->interrupt_in_urb);
 
 	metrousb_send_unidirectional_cmd(UNI_CMD_CLOSE, port);
@@ -186,8 +160,6 @@ static int metrousb_open(struct tty_struct *tty, struct usb_serial_port *port)
 	unsigned long flags = 0;
 	int result = 0;
 
-	dev_dbg(&port->dev, "%s\n", __func__);
-
 	/* Make sure the urb is initialized. */
 	if (!port->interrupt_in_urb) {
 		dev_err(&port->dev, "%s - interrupt urb not initialized\n",
@@ -227,8 +199,6 @@ static int metrousb_open(struct tty_struct *tty, struct usb_serial_port *port)
 			__func__, result);
 		goto exit;
 	}
-
-	dev_dbg(&port->dev, "%s - port open\n", __func__);
 exit:
 	return result;
 }
@@ -290,8 +260,6 @@ static void metrousb_throttle(struct tty_struct *tty)
 	struct metrousb_private *metro_priv = usb_get_serial_port_data(port);
 	unsigned long flags = 0;
 
-	dev_dbg(tty->dev, "%s\n", __func__);
-
 	/* Set the private information for the port to stop reading data. */
 	spin_lock_irqsave(&metro_priv->lock, flags);
 	metro_priv->throttled = 1;
@@ -305,8 +273,6 @@ static int metrousb_tiocmget(struct tty_struct *tty)
 	struct metrousb_private *metro_priv = usb_get_serial_port_data(port);
 	unsigned long flags = 0;
 
-	dev_dbg(tty->dev, "%s\n", __func__);
-
 	spin_lock_irqsave(&metro_priv->lock, flags);
 	control_state = metro_priv->control_state;
 	spin_unlock_irqrestore(&metro_priv->lock, flags);
@@ -350,15 +316,12 @@ static void metrousb_unthrottle(struct tty_struct *tty)
 	unsigned long flags = 0;
 	int result = 0;
 
-	dev_dbg(tty->dev, "%s\n", __func__);
-
 	/* Set the private information for the port to resume reading data. */
 	spin_lock_irqsave(&metro_priv->lock, flags);
 	metro_priv->throttled = 0;
 	spin_unlock_irqrestore(&metro_priv->lock, flags);
 
 	/* Submit the urb to read from the port. */
-	port->interrupt_in_urb->dev = port->serial->dev;
 	result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC);
 	if (result)
 		dev_err(tty->dev,
@@ -377,7 +340,6 @@ static struct usb_serial_driver metrousb_device = {
 	.open			= metrousb_open,
 	.close			= metrousb_cleanup,
 	.read_int_callback	= metrousb_read_int_callback,
-	.write_int_callback	= metrousb_write_int_callback,
 	.port_probe		= metrousb_port_probe,
 	.port_remove		= metrousb_port_remove,
 	.throttle		= metrousb_throttle,
diff --git a/drivers/usb/serial/mos7720.c b/drivers/usb/serial/mos7720.c
index 91bc170b408a..f075121c6e32 100644
--- a/drivers/usb/serial/mos7720.c
+++ b/drivers/usb/serial/mos7720.c
@@ -234,11 +234,16 @@ static int read_mos_reg(struct usb_serial *serial, unsigned int serial_portnum,
 
 	status = usb_control_msg(usbdev, pipe, request, requesttype, value,
 				     index, buf, 1, MOS_WDR_TIMEOUT);
-	if (status == 1)
+	if (status == 1) {
 		*data = *buf;
-	else if (status < 0)
+	} else {
 		dev_err(&usbdev->dev,
 			"mos7720: usb_control_msg() failed: %d\n", status);
+		if (status >= 0)
+			status = -EIO;
+		*data = 0;
+	}
+
 	kfree(buf);
 
 	return status;
@@ -1846,7 +1851,6 @@ static int get_serial_info(struct moschip_port *mos7720_port,
 	tmp.line		= mos7720_port->port->minor;
 	tmp.port		= mos7720_port->port->port_number;
 	tmp.irq			= 0;
-	tmp.flags		= ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
 	tmp.xmit_fifo_size	= NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
 	tmp.baud_base		= 9600;
 	tmp.close_delay		= 5*HZ;
diff --git a/drivers/usb/serial/mos7840.c b/drivers/usb/serial/mos7840.c
index ea27fb23967a..3821c53fcee9 100644
--- a/drivers/usb/serial/mos7840.c
+++ b/drivers/usb/serial/mos7840.c
@@ -284,9 +284,15 @@ static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg,
 	ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
 			      MCS_RD_RTYPE, 0, reg, buf, VENDOR_READ_LENGTH,
 			      MOS_WDR_TIMEOUT);
+	if (ret < VENDOR_READ_LENGTH) {
+		if (ret >= 0)
+			ret = -EIO;
+		goto out;
+	}
+
 	*val = buf[0];
 	dev_dbg(&port->dev, "%s offset is %x, return val %x\n", __func__, reg, *val);
-
+out:
 	kfree(buf);
 	return ret;
 }
@@ -352,8 +358,13 @@ static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg,
 	ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
 			      MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH,
 			      MOS_WDR_TIMEOUT);
+	if (ret < VENDOR_READ_LENGTH) {
+		if (ret >= 0)
+			ret = -EIO;
+		goto out;
+	}
 	*val = buf[0];
-
+out:
 	kfree(buf);
 	return ret;
 }
@@ -1023,6 +1034,7 @@ static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port)
 	 * (can't set it up in mos7840_startup as the structures *
 	 * were not set up at that time.)                        */
 	if (port0->open_ports == 1) {
+		/* FIXME: Buffer never NULL, so URB is not submitted. */
 		if (serial->port[0]->interrupt_in_buffer == NULL) {
 			/* set up interrupt urb */
 			usb_fill_int_urb(serial->port[0]->interrupt_in_urb,
@@ -1479,10 +1491,10 @@ static int mos7840_tiocmget(struct tty_struct *tty)
 		return -ENODEV;
 
 	status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr);
-	if (status != 1)
+	if (status < 0)
 		return -EIO;
 	status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr);
-	if (status != 1)
+	if (status < 0)
 		return -EIO;
 	result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
 	    | ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
@@ -1952,7 +1964,6 @@ static int mos7840_get_serial_info(struct moschip_port *mos7840_port,
 	tmp.line = mos7840_port->port->minor;
 	tmp.port = mos7840_port->port->port_number;
 	tmp.irq = 0;
-	tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
 	tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
 	tmp.baud_base = 9600;
 	tmp.close_delay = 5 * HZ;
@@ -2106,7 +2117,8 @@ static int mos7840_calc_num_ports(struct usb_serial *serial)
 static int mos7840_attach(struct usb_serial *serial)
 {
 	if (serial->num_bulk_in < serial->num_ports ||
-			serial->num_bulk_out < serial->num_ports) {
+			serial->num_bulk_out < serial->num_ports ||
+			serial->num_interrupt_in < 1) {
 		dev_err(&serial->interface->dev, "missing endpoints\n");
 		return -ENODEV;
 	}
diff --git a/drivers/usb/serial/opticon.c b/drivers/usb/serial/opticon.c
index 5ded6f524d59..3937b9c3cc69 100644
--- a/drivers/usb/serial/opticon.c
+++ b/drivers/usb/serial/opticon.c
@@ -142,7 +142,7 @@ static int opticon_open(struct tty_struct *tty, struct usb_serial_port *port)
 	usb_clear_halt(port->serial->dev, port->read_urb->pipe);
 
 	res = usb_serial_generic_open(tty, port);
-	if (!res)
+	if (res)
 		return res;
 
 	/* Request CTS line state, sometimes during opening the current
@@ -343,7 +343,6 @@ static int get_serial_info(struct usb_serial_port *port,
 	tmp.line		= port->minor;
 	tmp.port		= 0;
 	tmp.irq			= 0;
-	tmp.flags		= ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
 	tmp.xmit_fifo_size	= 1024;
 	tmp.baud_base		= 9600;
 	tmp.close_delay		= 5*HZ;
diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
index 1db4b61bdf7b..ca69eb42071b 100644
--- a/drivers/usb/serial/pl2303.c
+++ b/drivers/usb/serial/pl2303.c
@@ -450,7 +450,7 @@ static int pl2303_get_line_request(struct usb_serial_port *port,
 	if (ret != 7) {
 		dev_err(&port->dev, "%s - failed: %d\n", __func__, ret);
 
-		if (ret > 0)
+		if (ret >= 0)
 			ret = -EIO;
 
 		return ret;
@@ -470,12 +470,8 @@ static int pl2303_set_line_request(struct usb_serial_port *port,
 	ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
 				SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE,
 				0, 0, buf, 7, 100);
-	if (ret != 7) {
+	if (ret < 0) {
 		dev_err(&port->dev, "%s - failed: %d\n", __func__, ret);
-
-		if (ret > 0)
-			ret = -EIO;
-
 		return ret;
 	}
 
diff --git a/drivers/usb/serial/quatech2.c b/drivers/usb/serial/quatech2.c
index 5709cc93b083..fdbb904d153f 100644
--- a/drivers/usb/serial/quatech2.c
+++ b/drivers/usb/serial/quatech2.c
@@ -188,22 +188,22 @@ static inline int qt2_setdevice(struct usb_device *dev, u8 *data)
 }
 
 
-static inline int qt2_getdevice(struct usb_device *dev, u8 *data)
-{
-	return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
-			       QT_SET_GET_DEVICE, 0xc0, 0, 0,
-			       data, 3, QT2_USB_TIMEOUT);
-}
-
 static inline int qt2_getregister(struct usb_device *dev,
 				  u8 uart,
 				  u8 reg,
 				  u8 *data)
 {
-	return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
-			       QT_SET_GET_REGISTER, 0xc0, reg,
-			       uart, data, sizeof(*data), QT2_USB_TIMEOUT);
+	int ret;
+
+	ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
+			      QT_SET_GET_REGISTER, 0xc0, reg,
+			      uart, data, sizeof(*data), QT2_USB_TIMEOUT);
+	if (ret < sizeof(*data)) {
+		if (ret >= 0)
+			ret = -EIO;
+	}
 
+	return ret;
 }
 
 static inline int qt2_setregister(struct usb_device *dev,
@@ -372,9 +372,11 @@ static int qt2_open(struct tty_struct *tty, struct usb_serial_port *port)
 				 0xc0, 0,
 				 device_port, data, 2, QT2_USB_TIMEOUT);
 
-	if (status < 0) {
+	if (status < 2) {
 		dev_err(&port->dev, "%s - open port failed %i\n", __func__,
 			status);
+		if (status >= 0)
+			status = -EIO;
 		kfree(data);
 		return status;
 	}
@@ -463,7 +465,6 @@ static int get_serial_info(struct usb_serial_port *port,
 	tmp.line		= port->minor;
 	tmp.port		= 0;
 	tmp.irq			= 0;
-	tmp.flags		= ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
 	tmp.xmit_fifo_size	= port->bulk_out_size;
 	tmp.baud_base		= 9600;
 	tmp.close_delay		= 5*HZ;
diff --git a/drivers/usb/serial/sierra.c b/drivers/usb/serial/sierra.c
index e1994e264cc0..465e851b2815 100644
--- a/drivers/usb/serial/sierra.c
+++ b/drivers/usb/serial/sierra.c
@@ -137,24 +137,9 @@ static int is_himemory(const u8 ifnum,
 	return 0;
 }
 
-static int sierra_calc_interface(struct usb_serial *serial)
+static u8 sierra_interface_num(struct usb_serial *serial)
 {
-	int interface;
-	struct usb_interface *p_interface;
-	struct usb_host_interface *p_host_interface;
-
-	/* Get the interface structure pointer from the serial struct */
-	p_interface = serial->interface;
-
-	/* Get a pointer to the host interface structure */
-	p_host_interface = p_interface->cur_altsetting;
-
-	/* read the interface descriptor for this active altsetting
-	 * to find out the interface number we are on
-	*/
-	interface = p_host_interface->desc.bInterfaceNumber;
-
-	return interface;
+	return serial->interface->cur_altsetting->desc.bInterfaceNumber;
 }
 
 static int sierra_probe(struct usb_serial *serial,
@@ -165,7 +150,7 @@ static int sierra_probe(struct usb_serial *serial,
 	u8 ifnum;
 
 	udev = serial->dev;
-	ifnum = sierra_calc_interface(serial);
+	ifnum = sierra_interface_num(serial);
 
 	/*
 	 * If this interface supports more than 1 alternate
@@ -178,9 +163,6 @@ static int sierra_probe(struct usb_serial *serial,
 		usb_set_interface(udev, ifnum, 1);
 	}
 
-	/* ifnum could have changed - by calling usb_set_interface */
-	ifnum = sierra_calc_interface(serial);
-
 	if (is_blacklisted(ifnum,
 				(struct sierra_iface_info *)id->driver_info)) {
 		dev_dbg(&serial->dev->dev,
@@ -342,7 +324,7 @@ static int sierra_send_setup(struct usb_serial_port *port)
 
 	/* If composite device then properly report interface */
 	if (serial->num_ports == 1) {
-		interface = sierra_calc_interface(serial);
+		interface = sierra_interface_num(serial);
 		/* Control message is sent only to interfaces with
 		 * interrupt_in endpoints
 		 */
@@ -916,7 +898,7 @@ static int sierra_port_probe(struct usb_serial_port *port)
 	/* Determine actual memory requirements */
 	if (serial->num_ports == 1) {
 		/* Get interface number for composite device */
-		ifnum = sierra_calc_interface(serial);
+		ifnum = sierra_interface_num(serial);
 		himemoryp = &typeB_interface_list;
 	} else {
 		/* This is really the usb-serial port number of the interface
diff --git a/drivers/usb/serial/spcp8x5.c b/drivers/usb/serial/spcp8x5.c
index 475e6c31b266..ddfd787c461c 100644
--- a/drivers/usb/serial/spcp8x5.c
+++ b/drivers/usb/serial/spcp8x5.c
@@ -232,11 +232,17 @@ static int spcp8x5_get_msr(struct usb_serial_port *port, u8 *status)
 	ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
 			      GET_UART_STATUS, GET_UART_STATUS_TYPE,
 			      0, GET_UART_STATUS_MSR, buf, 1, 100);
-	if (ret < 0)
+	if (ret < 1) {
 		dev_err(&port->dev, "failed to get modem status: %d\n", ret);
+		if (ret >= 0)
+			ret = -EIO;
+		goto out;
+	}
 
 	dev_dbg(&port->dev, "0xc0:0x22:0:6  %d - 0x02%x\n", ret, *buf);
 	*status = *buf;
+	ret = 0;
+out:
 	kfree(buf);
 
 	return ret;
diff --git a/drivers/usb/serial/ssu100.c b/drivers/usb/serial/ssu100.c
index 2a156144c76c..5aa7bbbeba3d 100644
--- a/drivers/usb/serial/ssu100.c
+++ b/drivers/usb/serial/ssu100.c
@@ -80,9 +80,17 @@ static inline int ssu100_setdevice(struct usb_device *dev, u8 *data)
 
 static inline int ssu100_getdevice(struct usb_device *dev, u8 *data)
 {
-	return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
-			       QT_SET_GET_DEVICE, 0xc0, 0, 0,
-			       data, 3, 300);
+	int ret;
+
+	ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
+			      QT_SET_GET_DEVICE, 0xc0, 0, 0,
+			      data, 3, 300);
+	if (ret < 3) {
+		if (ret >= 0)
+			ret = -EIO;
+	}
+
+	return ret;
 }
 
 static inline int ssu100_getregister(struct usb_device *dev,
@@ -90,10 +98,17 @@ static inline int ssu100_getregister(struct usb_device *dev,
 				     unsigned short reg,
 				     u8 *data)
 {
-	return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
-			       QT_SET_GET_REGISTER, 0xc0, reg,
-			       uart, data, sizeof(*data), 300);
+	int ret;
+
+	ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
+			      QT_SET_GET_REGISTER, 0xc0, reg,
+			      uart, data, sizeof(*data), 300);
+	if (ret < sizeof(*data)) {
+		if (ret >= 0)
+			ret = -EIO;
+	}
 
+	return ret;
 }
 
 
@@ -289,8 +304,10 @@ static int ssu100_open(struct tty_struct *tty, struct usb_serial_port *port)
 				 QT_OPEN_CLOSE_CHANNEL,
 				 QT_TRANSFER_IN, 0x01,
 				 0, data, 2, 300);
-	if (result < 0) {
+	if (result < 2) {
 		dev_dbg(&port->dev, "%s - open failed %i\n", __func__, result);
+		if (result >= 0)
+			result = -EIO;
 		kfree(data);
 		return result;
 	}
@@ -322,7 +339,6 @@ static int get_serial_info(struct usb_serial_port *port,
 	tmp.line		= port->minor;
 	tmp.port		= 0;
 	tmp.irq			= 0;
-	tmp.flags		= ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
 	tmp.xmit_fifo_size	= port->bulk_out_size;
 	tmp.baud_base		= 9600;
 	tmp.close_delay		= 5*HZ;
diff --git a/drivers/usb/serial/ti_usb_3410_5052.c b/drivers/usb/serial/ti_usb_3410_5052.c
index 64b85b8dedf3..3107bf5d1c96 100644
--- a/drivers/usb/serial/ti_usb_3410_5052.c
+++ b/drivers/usb/serial/ti_usb_3410_5052.c
@@ -1553,13 +1553,10 @@ static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
 		(USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
 		value, moduleid, data, size, 1000);
 
-	if (status == size)
-		status = 0;
-
-	if (status > 0)
-		status = -ECOMM;
+	if (status < 0)
+		return status;
 
-	return status;
+	return 0;
 }
 
 
@@ -1575,8 +1572,7 @@ static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
 
 	if (status == size)
 		status = 0;
-
-	if (status > 0)
+	else if (status >= 0)
 		status = -ECOMM;
 
 	return status;
diff --git a/drivers/usb/serial/upd78f0730.c b/drivers/usb/serial/upd78f0730.c
new file mode 100644
index 000000000000..a028dd2310c9
--- /dev/null
+++ b/drivers/usb/serial/upd78f0730.c
@@ -0,0 +1,441 @@
+/*
+ * Renesas Electronics uPD78F0730 USB to serial converter driver
+ *
+ * Copyright (C) 2014,2016 Maksim Salau <maksim.salau@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * Protocol of the adaptor is described in the application note U19660EJ1V0AN00
+ * μPD78F0730 8-bit Single-Chip Microcontroller
+ * USB-to-Serial Conversion Software
+ * <https://www.renesas.com/en-eu/doc/DocumentServer/026/U19660EJ1V0AN00.pdf>
+ *
+ * The adaptor functionality is limited to the following:
+ * - data bits: 7 or 8
+ * - stop bits: 1 or 2
+ * - parity: even, odd or none
+ * - flow control: none
+ * - baud rates: 0, 2400, 4800, 9600, 19200, 38400, 57600, 115200, 153600
+ * - signals: DTR, RTS and BREAK
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/tty.h>
+#include <linux/usb.h>
+#include <linux/usb/serial.h>
+
+#define DRIVER_DESC "Renesas uPD78F0730 USB to serial converter driver"
+
+#define DRIVER_AUTHOR "Maksim Salau <maksim.salau@gmail.com>"
+
+static const struct usb_device_id id_table[] = {
+	{ USB_DEVICE(0x0409, 0x0063) }, /* V850ESJX3-STICK */
+	{ USB_DEVICE(0x045B, 0x0212) }, /* YRPBRL78G13, YRPBRL78G14 */
+	{ USB_DEVICE(0x064B, 0x7825) }, /* Analog Devices EVAL-ADXL362Z-DB */
+	{}
+};
+
+MODULE_DEVICE_TABLE(usb, id_table);
+
+/*
+ * Each adaptor is associated with a private structure, that holds the current
+ * state of control signals (DTR, RTS and BREAK).
+ */
+struct upd78f0730_port_private {
+	struct mutex	lock;		/* mutex to protect line_signals */
+	u8		line_signals;
+};
+
+/* Op-codes of control commands */
+#define UPD78F0730_CMD_LINE_CONTROL	0x00
+#define UPD78F0730_CMD_SET_DTR_RTS	0x01
+#define UPD78F0730_CMD_SET_XON_XOFF_CHR	0x02
+#define UPD78F0730_CMD_OPEN_CLOSE	0x03
+#define UPD78F0730_CMD_SET_ERR_CHR	0x04
+
+/* Data sizes in UPD78F0730_CMD_LINE_CONTROL command */
+#define UPD78F0730_DATA_SIZE_7_BITS	0x00
+#define UPD78F0730_DATA_SIZE_8_BITS	0x01
+#define UPD78F0730_DATA_SIZE_MASK	0x01
+
+/* Stop-bit modes in UPD78F0730_CMD_LINE_CONTROL command */
+#define UPD78F0730_STOP_BIT_1_BIT	0x00
+#define UPD78F0730_STOP_BIT_2_BIT	0x02
+#define UPD78F0730_STOP_BIT_MASK	0x02
+
+/* Parity modes in UPD78F0730_CMD_LINE_CONTROL command */
+#define UPD78F0730_PARITY_NONE	0x00
+#define UPD78F0730_PARITY_EVEN	0x04
+#define UPD78F0730_PARITY_ODD	0x08
+#define UPD78F0730_PARITY_MASK	0x0C
+
+/* Flow control modes in UPD78F0730_CMD_LINE_CONTROL command */
+#define UPD78F0730_FLOW_CONTROL_NONE	0x00
+#define UPD78F0730_FLOW_CONTROL_HW	0x10
+#define UPD78F0730_FLOW_CONTROL_SW	0x20
+#define UPD78F0730_FLOW_CONTROL_MASK	0x30
+
+/* Control signal bits in UPD78F0730_CMD_SET_DTR_RTS command */
+#define UPD78F0730_RTS		0x01
+#define UPD78F0730_DTR		0x02
+#define UPD78F0730_BREAK	0x04
+
+/* Port modes in UPD78F0730_CMD_OPEN_CLOSE command */
+#define UPD78F0730_PORT_CLOSE	0x00
+#define UPD78F0730_PORT_OPEN	0x01
+
+/* Error character substitution modes in UPD78F0730_CMD_SET_ERR_CHR command */
+#define UPD78F0730_ERR_CHR_DISABLED	0x00
+#define UPD78F0730_ERR_CHR_ENABLED	0x01
+
+/*
+ * Declaration of command structures
+ */
+
+/* UPD78F0730_CMD_LINE_CONTROL command */
+struct upd78f0730_line_control {
+	u8	opcode;
+	__le32	baud_rate;
+	u8	params;
+} __packed;
+
+/* UPD78F0730_CMD_SET_DTR_RTS command */
+struct upd78f0730_set_dtr_rts {
+	u8 opcode;
+	u8 params;
+};
+
+/* UPD78F0730_CMD_SET_XON_OFF_CHR command */
+struct upd78f0730_set_xon_xoff_chr {
+	u8 opcode;
+	u8 xon;
+	u8 xoff;
+};
+
+/* UPD78F0730_CMD_OPEN_CLOSE command */
+struct upd78f0730_open_close {
+	u8 opcode;
+	u8 state;
+};
+
+/* UPD78F0730_CMD_SET_ERR_CHR command */
+struct upd78f0730_set_err_chr {
+	u8 opcode;
+	u8 state;
+	u8 err_char;
+};
+
+static int upd78f0730_send_ctl(struct usb_serial_port *port,
+			const void *data, int size)
+{
+	struct usb_device *usbdev = port->serial->dev;
+	void *buf;
+	int res;
+
+	if (size <= 0 || !data)
+		return -EINVAL;
+
+	buf = kmemdup(data, size, GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
+	res = usb_control_msg(usbdev, usb_sndctrlpipe(usbdev, 0), 0x00,
+			USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
+			0x0000, 0x0000, buf, size, USB_CTRL_SET_TIMEOUT);
+
+	kfree(buf);
+
+	if (res != size) {
+		struct device *dev = &port->dev;
+
+		dev_err(dev, "failed to send control request %02x: %d\n",
+			*(u8 *)data, res);
+		/* The maximum expected length of a transfer is 6 bytes */
+		if (res >= 0)
+			res = -EIO;
+
+		return res;
+	}
+
+	return 0;
+}
+
+static int upd78f0730_port_probe(struct usb_serial_port *port)
+{
+	struct upd78f0730_port_private *private;
+
+	private = kzalloc(sizeof(*private), GFP_KERNEL);
+	if (!private)
+		return -ENOMEM;
+
+	mutex_init(&private->lock);
+	usb_set_serial_port_data(port, private);
+
+	return 0;
+}
+
+static int upd78f0730_port_remove(struct usb_serial_port *port)
+{
+	struct upd78f0730_port_private *private;
+
+	private = usb_get_serial_port_data(port);
+	mutex_destroy(&private->lock);
+	kfree(private);
+
+	return 0;
+}
+
+static int upd78f0730_tiocmget(struct tty_struct *tty)
+{
+	struct device *dev = tty->dev;
+	struct upd78f0730_port_private *private;
+	struct usb_serial_port *port = tty->driver_data;
+	int signals;
+	int res;
+
+	private = usb_get_serial_port_data(port);
+
+	mutex_lock(&private->lock);
+	signals = private->line_signals;
+	mutex_unlock(&private->lock);
+
+	res = ((signals & UPD78F0730_DTR) ? TIOCM_DTR : 0) |
+		((signals & UPD78F0730_RTS) ? TIOCM_RTS : 0);
+
+	dev_dbg(dev, "%s - res = %x\n", __func__, res);
+
+	return res;
+}
+
+static int upd78f0730_tiocmset(struct tty_struct *tty,
+			unsigned int set, unsigned int clear)
+{
+	struct device *dev = tty->dev;
+	struct usb_serial_port *port = tty->driver_data;
+	struct upd78f0730_port_private *private;
+	struct upd78f0730_set_dtr_rts request;
+	int res;
+
+	private = usb_get_serial_port_data(port);
+
+	mutex_lock(&private->lock);
+	if (set & TIOCM_DTR) {
+		private->line_signals |= UPD78F0730_DTR;
+		dev_dbg(dev, "%s - set DTR\n", __func__);
+	}
+	if (set & TIOCM_RTS) {
+		private->line_signals |= UPD78F0730_RTS;
+		dev_dbg(dev, "%s - set RTS\n", __func__);
+	}
+	if (clear & TIOCM_DTR) {
+		private->line_signals &= ~UPD78F0730_DTR;
+		dev_dbg(dev, "%s - clear DTR\n", __func__);
+	}
+	if (clear & TIOCM_RTS) {
+		private->line_signals &= ~UPD78F0730_RTS;
+		dev_dbg(dev, "%s - clear RTS\n", __func__);
+	}
+	request.opcode = UPD78F0730_CMD_SET_DTR_RTS;
+	request.params = private->line_signals;
+
+	res = upd78f0730_send_ctl(port, &request, sizeof(request));
+	mutex_unlock(&private->lock);
+
+	return res;
+}
+
+static void upd78f0730_break_ctl(struct tty_struct *tty, int break_state)
+{
+	struct device *dev = tty->dev;
+	struct upd78f0730_port_private *private;
+	struct usb_serial_port *port = tty->driver_data;
+	struct upd78f0730_set_dtr_rts request;
+
+	private = usb_get_serial_port_data(port);
+
+	mutex_lock(&private->lock);
+	if (break_state) {
+		private->line_signals |= UPD78F0730_BREAK;
+		dev_dbg(dev, "%s - set BREAK\n", __func__);
+	} else {
+		private->line_signals &= ~UPD78F0730_BREAK;
+		dev_dbg(dev, "%s - clear BREAK\n", __func__);
+	}
+	request.opcode = UPD78F0730_CMD_SET_DTR_RTS;
+	request.params = private->line_signals;
+
+	upd78f0730_send_ctl(port, &request, sizeof(request));
+	mutex_unlock(&private->lock);
+}
+
+static void upd78f0730_dtr_rts(struct usb_serial_port *port, int on)
+{
+	struct tty_struct *tty = port->port.tty;
+	unsigned int set = 0;
+	unsigned int clear = 0;
+
+	if (on)
+		set = TIOCM_DTR | TIOCM_RTS;
+	else
+		clear = TIOCM_DTR | TIOCM_RTS;
+
+	upd78f0730_tiocmset(tty, set, clear);
+}
+
+static speed_t upd78f0730_get_baud_rate(struct tty_struct *tty)
+{
+	const speed_t baud_rate = tty_get_baud_rate(tty);
+	const speed_t supported[] = {
+		0, 2400, 4800, 9600, 19200, 38400, 57600, 115200, 153600
+	};
+	int i;
+
+	for (i = ARRAY_SIZE(supported) - 1; i >= 0; i--) {
+		if (baud_rate == supported[i])
+			return baud_rate;
+	}
+
+	/* If the baud rate is not supported, switch to the default one */
+	tty_encode_baud_rate(tty, 9600, 9600);
+
+	return tty_get_baud_rate(tty);
+}
+
+static void upd78f0730_set_termios(struct tty_struct *tty,
+				struct usb_serial_port *port,
+				struct ktermios *old_termios)
+{
+	struct device *dev = &port->dev;
+	struct upd78f0730_line_control request;
+	speed_t baud_rate;
+
+	if (old_termios && !tty_termios_hw_change(&tty->termios, old_termios))
+		return;
+
+	if (C_BAUD(tty) == B0)
+		upd78f0730_dtr_rts(port, 0);
+	else if (old_termios && (old_termios->c_cflag & CBAUD) == B0)
+		upd78f0730_dtr_rts(port, 1);
+
+	baud_rate = upd78f0730_get_baud_rate(tty);
+	request.opcode = UPD78F0730_CMD_LINE_CONTROL;
+	request.baud_rate = cpu_to_le32(baud_rate);
+	request.params = 0;
+	dev_dbg(dev, "%s - baud rate = %d\n", __func__, baud_rate);
+
+	switch (C_CSIZE(tty)) {
+	case CS7:
+		request.params |= UPD78F0730_DATA_SIZE_7_BITS;
+		dev_dbg(dev, "%s - 7 data bits\n", __func__);
+		break;
+	default:
+		tty->termios.c_cflag &= ~CSIZE;
+		tty->termios.c_cflag |= CS8;
+		dev_warn(dev, "data size is not supported, using 8 bits\n");
+		/* fall through */
+	case CS8:
+		request.params |= UPD78F0730_DATA_SIZE_8_BITS;
+		dev_dbg(dev, "%s - 8 data bits\n", __func__);
+		break;
+	}
+
+	if (C_PARENB(tty)) {
+		if (C_PARODD(tty)) {
+			request.params |= UPD78F0730_PARITY_ODD;
+			dev_dbg(dev, "%s - odd parity\n", __func__);
+		} else {
+			request.params |= UPD78F0730_PARITY_EVEN;
+			dev_dbg(dev, "%s - even parity\n", __func__);
+		}
+
+		if (C_CMSPAR(tty)) {
+			tty->termios.c_cflag &= ~CMSPAR;
+			dev_warn(dev, "MARK/SPACE parity is not supported\n");
+		}
+	} else {
+		request.params |= UPD78F0730_PARITY_NONE;
+		dev_dbg(dev, "%s - no parity\n", __func__);
+	}
+
+	if (C_CSTOPB(tty)) {
+		request.params |= UPD78F0730_STOP_BIT_2_BIT;
+		dev_dbg(dev, "%s - 2 stop bits\n", __func__);
+	} else {
+		request.params |= UPD78F0730_STOP_BIT_1_BIT;
+		dev_dbg(dev, "%s - 1 stop bit\n", __func__);
+	}
+
+	if (C_CRTSCTS(tty)) {
+		tty->termios.c_cflag &= ~CRTSCTS;
+		dev_warn(dev, "RTSCTS flow control is not supported\n");
+	}
+	if (I_IXOFF(tty) || I_IXON(tty)) {
+		tty->termios.c_iflag &= ~(IXOFF | IXON);
+		dev_warn(dev, "XON/XOFF flow control is not supported\n");
+	}
+	request.params |= UPD78F0730_FLOW_CONTROL_NONE;
+	dev_dbg(dev, "%s - no flow control\n", __func__);
+
+	upd78f0730_send_ctl(port, &request, sizeof(request));
+}
+
+static int upd78f0730_open(struct tty_struct *tty, struct usb_serial_port *port)
+{
+	struct upd78f0730_open_close request = {
+		.opcode = UPD78F0730_CMD_OPEN_CLOSE,
+		.state = UPD78F0730_PORT_OPEN
+	};
+	int res;
+
+	res = upd78f0730_send_ctl(port, &request, sizeof(request));
+	if (res)
+		return res;
+
+	if (tty)
+		upd78f0730_set_termios(tty, port, NULL);
+
+	return usb_serial_generic_open(tty, port);
+}
+
+static void upd78f0730_close(struct usb_serial_port *port)
+{
+	struct upd78f0730_open_close request = {
+		.opcode = UPD78F0730_CMD_OPEN_CLOSE,
+		.state = UPD78F0730_PORT_CLOSE
+	};
+
+	usb_serial_generic_close(port);
+	upd78f0730_send_ctl(port, &request, sizeof(request));
+}
+
+static struct usb_serial_driver upd78f0730_device = {
+	.driver	 = {
+		.owner	= THIS_MODULE,
+		.name	= "upd78f0730",
+	},
+	.id_table	= id_table,
+	.num_ports	= 1,
+	.port_probe	= upd78f0730_port_probe,
+	.port_remove	= upd78f0730_port_remove,
+	.open		= upd78f0730_open,
+	.close		= upd78f0730_close,
+	.set_termios	= upd78f0730_set_termios,
+	.tiocmget	= upd78f0730_tiocmget,
+	.tiocmset	= upd78f0730_tiocmset,
+	.dtr_rts	= upd78f0730_dtr_rts,
+	.break_ctl	= upd78f0730_break_ctl,
+};
+
+static struct usb_serial_driver * const serial_drivers[] = {
+	&upd78f0730_device,
+	NULL
+};
+
+module_usb_serial_driver(serial_drivers, id_table);
+
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/usb/serial/whiteheat.c b/drivers/usb/serial/whiteheat.c
index d3ea90bef84d..5ab65eb1dacc 100644
--- a/drivers/usb/serial/whiteheat.c
+++ b/drivers/usb/serial/whiteheat.c
@@ -487,7 +487,6 @@ static int whiteheat_ioctl(struct tty_struct *tty,
 		serstruct.type = PORT_16654;
 		serstruct.line = port->minor;
 		serstruct.port = port->port_number;
-		serstruct.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
 		serstruct.xmit_fifo_size = kfifo_size(&port->write_fifo);
 		serstruct.custom_divisor = 0;
 		serstruct.baud_base = 460800;
diff --git a/drivers/usb/storage/ene_ub6250.c b/drivers/usb/storage/ene_ub6250.c
index 02bdaa912164..369f3c24815a 100644
--- a/drivers/usb/storage/ene_ub6250.c
+++ b/drivers/usb/storage/ene_ub6250.c
@@ -1364,7 +1364,6 @@ static int ms_lib_read_extra(struct us_data *us, u32 PhyBlock,
 
 static int ms_libsearch_block_from_physical(struct us_data *us, u16 phyblk)
 {
-	u16 Newblk;
 	u16 blk;
 	struct ms_lib_type_extdat extdat; /* need check */
 	struct ene_ub6250_info *info = (struct ene_ub6250_info *) us->extra;
@@ -1377,7 +1376,6 @@ static int ms_libsearch_block_from_physical(struct us_data *us, u16 phyblk)
 		if ((blk & MS_PHYSICAL_BLOCKS_PER_SEGMENT_MASK) == 0)
 			blk -= MS_PHYSICAL_BLOCKS_PER_SEGMENT;
 
-		Newblk = info->MS_Lib.Phy2LogMap[blk];
 		if (info->MS_Lib.Phy2LogMap[blk] == MS_LB_NOT_USED_ERASED) {
 			return blk;
 		} else if (info->MS_Lib.Phy2LogMap[blk] == MS_LB_NOT_USED) {
diff --git a/drivers/usb/storage/sddr09.c b/drivers/usb/storage/sddr09.c
index 3aeaa536c44f..44f8ffccd031 100644
--- a/drivers/usb/storage/sddr09.c
+++ b/drivers/usb/storage/sddr09.c
@@ -870,13 +870,12 @@ sddr09_write_lba(struct us_data *us, unsigned int lba,
 	unsigned int pagelen;
 	unsigned char *bptr, *cptr, *xptr;
 	unsigned char ecc[3];
-	int i, result, isnew;
+	int i, result;
 
 	lbap = ((lba % 1000) << 1) | 0x1000;
 	if (parity[MSB_of(lbap) ^ LSB_of(lbap)])
 		lbap ^= 1;
 	pba = info->lba_to_pba[lba];
-	isnew = 0;
 
 	if (pba == UNDEF) {
 		pba = sddr09_find_unused_pba(info, lba);
@@ -887,7 +886,6 @@ sddr09_write_lba(struct us_data *us, unsigned int lba,
 		}
 		info->pba_to_lba[pba] = lba;
 		info->lba_to_pba[lba] = pba;
-		isnew = 1;
 	}
 
 	if (pba == 1) {
diff --git a/drivers/usb/usbip/vhci_hcd.c b/drivers/usb/usbip/vhci_hcd.c
index c4724fb3a691..e4cb9f0625e8 100644
--- a/drivers/usb/usbip/vhci_hcd.c
+++ b/drivers/usb/usbip/vhci_hcd.c
@@ -313,6 +313,7 @@ static int vhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
 			default:
 				break;
 			}
+			break;
 		default:
 			usbip_dbg_vhci_rh(" ClearPortFeature: default %x\n",
 					  wValue);