Merge tag 'usb-5.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

Pull USB/PHY updates from Greg KH: "Here is the big set of USB and PHY driver patches for 5.2-rc1 There is the usual set of: - USB gadget updates - PHY driver updates and additions - USB serial driver updates and fixes - typec updates and new chips supported - mtu3 driver updates - xhci driver updates - other tiny driver updates Nothing really interesting, just constant forward progress. All of these have been in linux-next for a while with no reported issues. The usb-gadget and usb-serial trees were merged a bit "late", but both of them had been in linux-next before they got merged here last Friday" * tag 'usb-5.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (206 commits) USB: serial: f81232: implement break control USB: serial: f81232: add high baud rate support USB: serial: f81232: clear overrun flag USB: serial: f81232: fix interrupt worker not stop usb: dwc3: Rename DWC3_DCTL_LPM_ERRATA usb: dwc3: Fix default lpm_nyet_threshold value usb: dwc3: debug: Print GET_STATUS(device) tracepoint usb: dwc3: Do core validation early on probe usb: dwc3: gadget: Set lpm_capable usb: gadget: atmel: tie wake lock to running clock usb: gadget: atmel: support USB suspend usb: gadget: atmel_usba_udc: simplify setting of interrupt-enabled mask dwc2: gadget: Fix completed transfer size calculation in DDMA usb: dwc2: Set lpm mode parameters depend on HW configuration usb: dwc2: Fix channel disable flow usb: dwc2: Set actual frame number for completed ISOC transfer usb: gadget: do not use __constant_cpu_to_le16 usb: dwc2: gadget: Increase descriptors count for ISOC's usb: introduce usb_ep_type_string() function usb: dwc3: move synchronize_irq() out of the spinlock protected block ...
author: Linus Torvalds <torvalds@linux-foundation.org> 2019-05-08 19:03:52 +0200
committer: Linus Torvalds <torvalds@linux-foundation.org> 2019-05-08 19:03:52 +0200
commit: 132d68d37d33f1d0b9c1f507c8b4d64c27ecec8a (patch)
tree: b3c05972e5579e1574873fe745fb1358c62a269c /drivers/usb
parent: Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next (diff)
parent: Merge tag 'usb-for-v5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/bal... (diff)
download: linux-132d68d37d33f1d0b9c1f507c8b4d64c27ecec8a.tar.xz
linux-132d68d37d33f1d0b9c1f507c8b4d64c27ecec8a.zip
100 files changed, 5237 insertions, 1620 deletions
diff --git a/drivers/usb/chipidea/ci_hdrc_msm.c b/drivers/usb/chipidea/ci_hdrc_msm.c
index 880009987460..b8b3caad889c 100644
--- a/drivers/usb/chipidea/ci_hdrc_msm.c
+++ b/drivers/usb/chipidea/ci_hdrc_msm.c
@@ -205,12 +205,9 @@ static int ci_hdrc_msm_probe(struct platform_device *pdev)
 	if (IS_ERR(clk))
 		return PTR_ERR(clk);
 
-	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;
-	}
+	ci->fs_clk = clk = devm_clk_get_optional(&pdev->dev, "fs");
+	if (IS_ERR(clk))
+		return PTR_ERR(clk);
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
 	ci->base = devm_ioremap_resource(&pdev->dev, res);
diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index ec666eb4b7b4..183b41753c98 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -468,14 +468,13 @@ static void acm_read_bulk_callback(struct urb *urb)
 {
 	struct acm_rb *rb = urb->context;
 	struct acm *acm = rb->instance;
-	unsigned long flags;
 	int status = urb->status;
+	bool stopped = false;
+	bool stalled = false;
 
 	dev_vdbg(&acm->data->dev, "got urb %d, len %d, status %d\n",
 		rb->index, urb->actual_length, status);
 
-	set_bit(rb->index, &acm->read_urbs_free);
-
 	if (!acm->dev) {
 		dev_dbg(&acm->data->dev, "%s - disconnected\n", __func__);
 		return;
@@ -488,15 +487,16 @@ static void acm_read_bulk_callback(struct urb *urb)
 		break;
 	case -EPIPE:
 		set_bit(EVENT_RX_STALL, &acm->flags);
-		schedule_work(&acm->work);
-		return;
+		stalled = true;
+		break;
 	case -ENOENT:
 	case -ECONNRESET:
 	case -ESHUTDOWN:
 		dev_dbg(&acm->data->dev,
 			"%s - urb shutting down with status: %d\n",
 			__func__, status);
-		return;
+		stopped = true;
+		break;
 	default:
 		dev_dbg(&acm->data->dev,
 			"%s - nonzero urb status received: %d\n",
@@ -505,20 +505,29 @@ static void acm_read_bulk_callback(struct urb *urb)
 	}
 
 	/*
-	 * Unthrottle may run on another CPU which needs to see events
-	 * in the same order. Submission has an implict barrier
+	 * Make sure URB processing is done before marking as free to avoid
+	 * racing with unthrottle() on another CPU. Matches the barriers
+	 * implied by the test_and_clear_bit() in acm_submit_read_urb().
 	 */
 	smp_mb__before_atomic();
+	set_bit(rb->index, &acm->read_urbs_free);
+	/*
+	 * Make sure URB is marked as free before checking the throttled flag
+	 * to avoid racing with unthrottle() on another CPU. Matches the
+	 * smp_mb() in unthrottle().
+	 */
+	smp_mb__after_atomic();
 
-	/* throttle device if requested by tty */
-	spin_lock_irqsave(&acm->read_lock, flags);
-	acm->throttled = acm->throttle_req;
-	if (!acm->throttled) {
-		spin_unlock_irqrestore(&acm->read_lock, flags);
-		acm_submit_read_urb(acm, rb->index, GFP_ATOMIC);
-	} else {
-		spin_unlock_irqrestore(&acm->read_lock, flags);
+	if (stopped || stalled) {
+		if (stalled)
+			schedule_work(&acm->work);
+		return;
 	}
+
+	if (test_bit(ACM_THROTTLED, &acm->flags))
+		return;
+
+	acm_submit_read_urb(acm, rb->index, GFP_ATOMIC);
 }
 
 /* data interface wrote those outgoing bytes */
@@ -655,10 +664,7 @@ static int acm_port_activate(struct tty_port *port, struct tty_struct *tty)
 	/*
 	 * Unthrottle device in case the TTY was closed while throttled.
 	 */
-	spin_lock_irq(&acm->read_lock);
-	acm->throttled = 0;
-	acm->throttle_req = 0;
-	spin_unlock_irq(&acm->read_lock);
+	clear_bit(ACM_THROTTLED, &acm->flags);
 
 	retval = acm_submit_read_urbs(acm, GFP_KERNEL);
 	if (retval)
@@ -826,24 +832,19 @@ static void acm_tty_throttle(struct tty_struct *tty)
 {
 	struct acm *acm = tty->driver_data;
 
-	spin_lock_irq(&acm->read_lock);
-	acm->throttle_req = 1;
-	spin_unlock_irq(&acm->read_lock);
+	set_bit(ACM_THROTTLED, &acm->flags);
 }
 
 static void acm_tty_unthrottle(struct tty_struct *tty)
 {
 	struct acm *acm = tty->driver_data;
-	unsigned int was_throttled;
 
-	spin_lock_irq(&acm->read_lock);
-	was_throttled = acm->throttled;
-	acm->throttled = 0;
-	acm->throttle_req = 0;
-	spin_unlock_irq(&acm->read_lock);
+	clear_bit(ACM_THROTTLED, &acm->flags);
+
+	/* Matches the smp_mb__after_atomic() in acm_read_bulk_callback(). */
+	smp_mb();
 
-	if (was_throttled)
-		acm_submit_read_urbs(acm, GFP_KERNEL);
+	acm_submit_read_urbs(acm, GFP_KERNEL);
 }
 
 static int acm_tty_break_ctl(struct tty_struct *tty, int state)
diff --git a/drivers/usb/class/cdc-acm.h b/drivers/usb/class/cdc-acm.h
index 515aad0847ee..ca1c026382c2 100644
--- a/drivers/usb/class/cdc-acm.h
+++ b/drivers/usb/class/cdc-acm.h
@@ -108,6 +108,7 @@ struct acm {
 	unsigned long flags;
 #		define EVENT_TTY_WAKEUP	0
 #		define EVENT_RX_STALL	1
+#		define ACM_THROTTLED	2
 	struct usb_cdc_line_coding line;		/* bits, stop, parity */
 	struct work_struct work;			/* work queue entry for line discipline waking up */
 	unsigned int ctrlin;				/* input control lines (DCD, DSR, RI, break, overruns) */
@@ -122,8 +123,6 @@ struct acm {
 	unsigned int ctrl_caps;				/* control capabilities from the class specific header */
 	unsigned int susp_count;			/* number of suspended interfaces */
 	unsigned int combined_interfaces:1;		/* control and data collapsed */
-	unsigned int throttled:1;			/* actually throttled */
-	unsigned int throttle_req:1;			/* throttle requested */
 	u8 bInterval;
 	struct usb_anchor delayed;			/* writes queued for a device about to be woken */
 	unsigned long quirks;
diff --git a/drivers/usb/common/common.c b/drivers/usb/common/common.c
index 73c8e6591746..18f5dcf58b0d 100644
--- a/drivers/usb/common/common.c
+++ b/drivers/usb/common/common.c
@@ -16,6 +16,22 @@
 #include <linux/usb/otg.h>
 #include <linux/of_platform.h>
 
+static const char *const ep_type_names[] = {
+	[USB_ENDPOINT_XFER_CONTROL] = "ctrl",
+	[USB_ENDPOINT_XFER_ISOC] = "isoc",
+	[USB_ENDPOINT_XFER_BULK] = "bulk",
+	[USB_ENDPOINT_XFER_INT] = "intr",
+};
+
+const char *usb_ep_type_string(int ep_type)
+{
+	if (ep_type < 0 || ep_type >= ARRAY_SIZE(ep_type_names))
+		return "unknown";
+
+	return ep_type_names[ep_type];
+}
+EXPORT_SYMBOL_GPL(usb_ep_type_string);
+
 const char *usb_otg_state_string(enum usb_otg_state state)
 {
 	static const char *const names[] = {
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index 975d7c1288e3..94d22551fc1b 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -1878,23 +1878,10 @@ rescan:
 		/* kick hcd */
 		unlink1(hcd, urb, -ESHUTDOWN);
 		dev_dbg (hcd->self.controller,
-			"shutdown urb %pK ep%d%s%s\n",
+			"shutdown urb %pK ep%d%s-%s\n",
 			urb, usb_endpoint_num(&ep->desc),
 			is_in ? "in" : "out",
-			({	char *s;
-
-				 switch (usb_endpoint_type(&ep->desc)) {
-				 case USB_ENDPOINT_XFER_CONTROL:
-					s = ""; break;
-				 case USB_ENDPOINT_XFER_BULK:
-					s = "-bulk"; break;
-				 case USB_ENDPOINT_XFER_INT:
-					s = "-intr"; break;
-				 default:
-					s = "-iso"; break;
-				};
-				s;
-			}));
+			usb_ep_type_string(usb_endpoint_type(&ep->desc)));
 		usb_put_urb (urb);
 
 		/* list contents may have changed */
@@ -2448,6 +2435,19 @@ EXPORT_SYMBOL_GPL(usb_hcd_irq);
 
 /*-------------------------------------------------------------------------*/
 
+/* Workqueue routine for when the root-hub has died. */
+static void hcd_died_work(struct work_struct *work)
+{
+	struct usb_hcd *hcd = container_of(work, struct usb_hcd, died_work);
+	static char *env[] = {
+		"ERROR=DEAD",
+		NULL
+	};
+
+	/* Notify user space that the host controller has died */
+	kobject_uevent_env(&hcd->self.root_hub->dev.kobj, KOBJ_OFFLINE, env);
+}
+
 /**
  * usb_hc_died - report abnormal shutdown of a host controller (bus glue)
  * @hcd: pointer to the HCD representing the controller
@@ -2488,6 +2488,13 @@ void usb_hc_died (struct usb_hcd *hcd)
 			usb_kick_hub_wq(hcd->self.root_hub);
 		}
 	}
+
+	/* Handle the case where this function gets called with a shared HCD */
+	if (usb_hcd_is_primary_hcd(hcd))
+		schedule_work(&hcd->died_work);
+	else
+		schedule_work(&hcd->primary_hcd->died_work);
+
 	spin_unlock_irqrestore (&hcd_root_hub_lock, flags);
 	/* Make sure that the other roothub is also deallocated. */
 }
@@ -2555,6 +2562,8 @@ struct usb_hcd *__usb_create_hcd(const struct hc_driver *driver,
 	INIT_WORK(&hcd->wakeup_work, hcd_resume_work);
 #endif
 
+	INIT_WORK(&hcd->died_work, hcd_died_work);
+
 	hcd->driver = driver;
 	hcd->speed = driver->flags & HCD_MASK;
 	hcd->product_desc = (driver->product_desc) ? driver->product_desc :
@@ -2908,6 +2917,7 @@ error_create_attr_group:
 #ifdef CONFIG_PM
 	cancel_work_sync(&hcd->wakeup_work);
 #endif
+	cancel_work_sync(&hcd->died_work);
 	mutex_lock(&usb_bus_idr_lock);
 	usb_disconnect(&rhdev);		/* Sets rhdev to NULL */
 	mutex_unlock(&usb_bus_idr_lock);
@@ -2968,6 +2978,7 @@ void usb_remove_hcd(struct usb_hcd *hcd)
 #ifdef CONFIG_PM
 	cancel_work_sync(&hcd->wakeup_work);
 #endif
+	cancel_work_sync(&hcd->died_work);
 
 	mutex_lock(&usb_bus_idr_lock);
 	usb_disconnect(&rhdev);		/* Sets rhdev to NULL */
@@ -3020,6 +3031,9 @@ usb_hcd_platform_shutdown(struct platform_device *dev)
 {
 	struct usb_hcd *hcd = platform_get_drvdata(dev);
 
+	/* No need for pm_runtime_put(), we're shutting down */
+	pm_runtime_get_sync(&dev->dev);
+
 	if (hcd->driver->shutdown)
 		hcd->driver->shutdown(hcd);
 }
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 8d4631c81b9f..2f94568ba385 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -3174,13 +3174,14 @@ static int usb_disable_remote_wakeup(struct usb_device *udev)
 }
 
 /* Count of wakeup-enabled devices at or below udev */
-static unsigned wakeup_enabled_descendants(struct usb_device *udev)
+unsigned usb_wakeup_enabled_descendants(struct usb_device *udev)
 {
 	struct usb_hub *hub = usb_hub_to_struct_hub(udev);
 
 	return udev->do_remote_wakeup +
 			(hub ? hub->wakeup_enabled_descendants : 0);
 }
+EXPORT_SYMBOL_GPL(usb_wakeup_enabled_descendants);
 
 /*
  * usb_port_suspend - suspend a usb device's upstream port
@@ -3282,7 +3283,7 @@ int usb_port_suspend(struct usb_device *udev, pm_message_t msg)
 	 * Therefore we will turn on the suspend feature if udev or any of its
 	 * descendants is enabled for remote wakeup.
 	 */
-	else if (PMSG_IS_AUTO(msg) || wakeup_enabled_descendants(udev) > 0)
+	else if (PMSG_IS_AUTO(msg) || usb_wakeup_enabled_descendants(udev) > 0)
 		status = set_port_feature(hub->hdev, port1,
 				USB_PORT_FEAT_SUSPEND);
 	else {
@@ -3668,7 +3669,6 @@ static int hub_suspend(struct usb_interface *intf, pm_message_t msg)
 	struct usb_hub		*hub = usb_get_intfdata(intf);
 	struct usb_device	*hdev = hub->hdev;
 	unsigned		port1;
-	int			status;
 
 	/*
 	 * Warn if children aren't already suspended.
@@ -3687,7 +3687,7 @@ static int hub_suspend(struct usb_interface *intf, pm_message_t msg)
 		}
 		if (udev)
 			hub->wakeup_enabled_descendants +=
-					wakeup_enabled_descendants(udev);
+					usb_wakeup_enabled_descendants(udev);
 	}
 
 	if (hdev->do_remote_wakeup && hub->quirk_check_port_auto_suspend) {
@@ -3702,12 +3702,12 @@ static int hub_suspend(struct usb_interface *intf, pm_message_t msg)
 	if (hub_is_superspeed(hdev) && hdev->do_remote_wakeup) {
 		/* Enable hub to send remote wakeup for all ports. */
 		for (port1 = 1; port1 <= hdev->maxchild; port1++) {
-			status = set_port_feature(hdev,
-					port1 |
-					USB_PORT_FEAT_REMOTE_WAKE_CONNECT |
-					USB_PORT_FEAT_REMOTE_WAKE_DISCONNECT |
-					USB_PORT_FEAT_REMOTE_WAKE_OVER_CURRENT,
-					USB_PORT_FEAT_REMOTE_WAKE_MASK);
+			set_port_feature(hdev,
+					 port1 |
+					 USB_PORT_FEAT_REMOTE_WAKE_CONNECT |
+					 USB_PORT_FEAT_REMOTE_WAKE_DISCONNECT |
+					 USB_PORT_FEAT_REMOTE_WAKE_OVER_CURRENT,
+					 USB_PORT_FEAT_REMOTE_WAKE_MASK);
 		}
 	}
 
@@ -5902,7 +5902,10 @@ int usb_reset_device(struct usb_device *udev)
 					cintf->needs_binding = 1;
 			}
 		}
-		usb_unbind_and_rebind_marked_interfaces(udev);
+
+		/* If the reset failed, hub_wq will unbind drivers later */
+		if (ret == 0)
+			usb_unbind_and_rebind_marked_interfaces(udev);
 	}
 
 	usb_autosuspend_device(udev);
diff --git a/drivers/usb/dwc2/core.c b/drivers/usb/dwc2/core.c
index 55d5ae2a7ec7..8b499d643461 100644
--- a/drivers/usb/dwc2/core.c
+++ b/drivers/usb/dwc2/core.c
@@ -1020,6 +1020,205 @@ int dwc2_hsotg_wait_bit_clear(struct dwc2_hsotg *hsotg, u32 offset, u32 mask,
 	return -ETIMEDOUT;
 }
 
+/*
+ * Initializes the FSLSPClkSel field of the HCFG register depending on the
+ * PHY type
+ */
+void dwc2_init_fs_ls_pclk_sel(struct dwc2_hsotg *hsotg)
+{
+	u32 hcfg, val;
+
+	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) ||
+	    hsotg->params.phy_type == DWC2_PHY_TYPE_PARAM_FS) {
+		/* Full speed PHY */
+		val = HCFG_FSLSPCLKSEL_48_MHZ;
+	} else {
+		/* High speed PHY running at full speed or high speed */
+		val = HCFG_FSLSPCLKSEL_30_60_MHZ;
+	}
+
+	dev_dbg(hsotg->dev, "Initializing HCFG.FSLSPClkSel to %08x\n", val);
+	hcfg = dwc2_readl(hsotg, HCFG);
+	hcfg &= ~HCFG_FSLSPCLKSEL_MASK;
+	hcfg |= val << HCFG_FSLSPCLKSEL_SHIFT;
+	dwc2_writel(hsotg, hcfg, HCFG);
+}
+
+static int dwc2_fs_phy_init(struct dwc2_hsotg *hsotg, bool select_phy)
+{
+	u32 usbcfg, ggpio, i2cctl;
+	int retval = 0;
+
+	/*
+	 * core_init() is now called on every switch so only call the
+	 * following for the first time through
+	 */
+	if (select_phy) {
+		dev_dbg(hsotg->dev, "FS PHY selected\n");
+
+		usbcfg = dwc2_readl(hsotg, GUSBCFG);
+		if (!(usbcfg & GUSBCFG_PHYSEL)) {
+			usbcfg |= GUSBCFG_PHYSEL;
+			dwc2_writel(hsotg, usbcfg, GUSBCFG);
+
+			/* Reset after a PHY select */
+			retval = dwc2_core_reset(hsotg, false);
+
+			if (retval) {
+				dev_err(hsotg->dev,
+					"%s: Reset failed, aborting", __func__);
+				return retval;
+			}
+		}
+
+		if (hsotg->params.activate_stm_fs_transceiver) {
+			ggpio = dwc2_readl(hsotg, GGPIO);
+			if (!(ggpio & GGPIO_STM32_OTG_GCCFG_PWRDWN)) {
+				dev_dbg(hsotg->dev, "Activating transceiver\n");
+				/*
+				 * STM32F4x9 uses the GGPIO register as general
+				 * core configuration register.
+				 */
+				ggpio |= GGPIO_STM32_OTG_GCCFG_PWRDWN;
+				dwc2_writel(hsotg, ggpio, GGPIO);
+			}
+		}
+	}
+
+	/*
+	 * Program DCFG.DevSpd or HCFG.FSLSPclkSel to 48Mhz in FS. Also
+	 * do this on HNP Dev/Host mode switches (done in dev_init and
+	 * host_init).
+	 */
+	if (dwc2_is_host_mode(hsotg))
+		dwc2_init_fs_ls_pclk_sel(hsotg);
+
+	if (hsotg->params.i2c_enable) {
+		dev_dbg(hsotg->dev, "FS PHY enabling I2C\n");
+
+		/* Program GUSBCFG.OtgUtmiFsSel to I2C */
+		usbcfg = dwc2_readl(hsotg, GUSBCFG);
+		usbcfg |= GUSBCFG_OTG_UTMI_FS_SEL;
+		dwc2_writel(hsotg, usbcfg, GUSBCFG);
+
+		/* Program GI2CCTL.I2CEn */
+		i2cctl = dwc2_readl(hsotg, GI2CCTL);
+		i2cctl &= ~GI2CCTL_I2CDEVADDR_MASK;
+		i2cctl |= 1 << GI2CCTL_I2CDEVADDR_SHIFT;
+		i2cctl &= ~GI2CCTL_I2CEN;
+		dwc2_writel(hsotg, i2cctl, GI2CCTL);
+		i2cctl |= GI2CCTL_I2CEN;
+		dwc2_writel(hsotg, i2cctl, GI2CCTL);
+	}
+
+	return retval;
+}
+
+static int dwc2_hs_phy_init(struct dwc2_hsotg *hsotg, bool select_phy)
+{
+	u32 usbcfg, usbcfg_old;
+	int retval = 0;
+
+	if (!select_phy)
+		return 0;
+
+	usbcfg = dwc2_readl(hsotg, GUSBCFG);
+	usbcfg_old = usbcfg;
+
+	/*
+	 * HS PHY parameters. These parameters are preserved during soft reset
+	 * so only program the first time. Do a soft reset immediately after
+	 * setting phyif.
+	 */
+	switch (hsotg->params.phy_type) {
+	case DWC2_PHY_TYPE_PARAM_ULPI:
+		/* ULPI interface */
+		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)
+			usbcfg |= GUSBCFG_DDRSEL;
+
+		/* Set external VBUS indicator as needed. */
+		if (hsotg->params.oc_disable)
+			usbcfg |= (GUSBCFG_ULPI_INT_VBUS_IND |
+				   GUSBCFG_INDICATORPASSTHROUGH);
+		break;
+	case DWC2_PHY_TYPE_PARAM_UTMI:
+		/* UTMI+ interface */
+		dev_dbg(hsotg->dev, "HS UTMI+ PHY selected\n");
+		usbcfg &= ~(GUSBCFG_ULPI_UTMI_SEL | GUSBCFG_PHYIF16);
+		if (hsotg->params.phy_utmi_width == 16)
+			usbcfg |= GUSBCFG_PHYIF16;
+
+		/* Set turnaround time */
+		if (dwc2_is_device_mode(hsotg)) {
+			usbcfg &= ~GUSBCFG_USBTRDTIM_MASK;
+			if (hsotg->params.phy_utmi_width == 16)
+				usbcfg |= 5 << GUSBCFG_USBTRDTIM_SHIFT;
+			else
+				usbcfg |= 9 << GUSBCFG_USBTRDTIM_SHIFT;
+		}
+		break;
+	default:
+		dev_err(hsotg->dev, "FS PHY selected at HS!\n");
+		break;
+	}
+
+	if (usbcfg != usbcfg_old) {
+		dwc2_writel(hsotg, usbcfg, GUSBCFG);
+
+		/* Reset after setting the PHY parameters */
+		retval = dwc2_core_reset(hsotg, false);
+		if (retval) {
+			dev_err(hsotg->dev,
+				"%s: Reset failed, aborting", __func__);
+			return retval;
+		}
+	}
+
+	return retval;
+}
+
+int dwc2_phy_init(struct dwc2_hsotg *hsotg, bool select_phy)
+{
+	u32 usbcfg;
+	int retval = 0;
+
+	if ((hsotg->params.speed == DWC2_SPEED_PARAM_FULL ||
+	     hsotg->params.speed == DWC2_SPEED_PARAM_LOW) &&
+	    hsotg->params.phy_type == DWC2_PHY_TYPE_PARAM_FS) {
+		/* If FS/LS mode with FS/LS PHY */
+		retval = dwc2_fs_phy_init(hsotg, select_phy);
+		if (retval)
+			return retval;
+	} else {
+		/* High speed PHY */
+		retval = dwc2_hs_phy_init(hsotg, select_phy);
+		if (retval)
+			return retval;
+	}
+
+	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) {
+		dev_dbg(hsotg->dev, "Setting ULPI FSLS\n");
+		usbcfg = dwc2_readl(hsotg, GUSBCFG);
+		usbcfg |= GUSBCFG_ULPI_FS_LS;
+		usbcfg |= GUSBCFG_ULPI_CLK_SUSP_M;
+		dwc2_writel(hsotg, usbcfg, GUSBCFG);
+	} else {
+		usbcfg = dwc2_readl(hsotg, GUSBCFG);
+		usbcfg &= ~GUSBCFG_ULPI_FS_LS;
+		usbcfg &= ~GUSBCFG_ULPI_CLK_SUSP_M;
+		dwc2_writel(hsotg, usbcfg, GUSBCFG);
+	}
+
+	return retval;
+}
+
 MODULE_DESCRIPTION("DESIGNWARE HS OTG Core");
 MODULE_AUTHOR("Synopsys, Inc.");
 MODULE_LICENSE("Dual BSD/GPL");
diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h
index 30bab8463c96..152ac41dfb2d 100644
--- a/drivers/usb/dwc2/core.h
+++ b/drivers/usb/dwc2/core.h
@@ -859,6 +859,8 @@ struct dwc2_hregs_backup {
  * @gadget_enabled:	Peripheral mode sub-driver initialization indicator.
  * @ll_hw_enabled:	Status of low-level hardware resources.
  * @hibernated:		True if core is hibernated
+ * @reset_phy_on_wake:	Quirk saying that we should assert PHY reset on a
+ *			remote wakeup.
  * @frame_number:       Frame number read from the core. For both device
  *			and host modes. The value ranges are from 0
  *			to HFNUM_MAX_FRNUM.
@@ -869,7 +871,6 @@ struct dwc2_hregs_backup {
  *                      removed once all SoCs support usb transceiver.
  * @supplies:           Definition of USB power supplies
  * @vbus_supply:        Regulator supplying vbus.
- * @phyif:              PHY interface width
  * @lock:		Spinlock that protects all the driver data structures
  * @priv:		Stores a pointer to the struct usb_hcd
  * @queuing_high_bandwidth: True if multiple packets of a high-bandwidth
@@ -972,6 +973,7 @@ struct dwc2_hregs_backup {
  * @status_buf_dma:     DMA address for status_buf
  * @start_work:         Delayed work for handling host A-cable connection
  * @reset_work:         Delayed work for handling a port reset
+ * @phy_reset_work:     Work structure for doing a PHY reset
  * @otg_port:           OTG port number
  * @frame_list:         Frame list
  * @frame_list_dma:     Frame list DMA address
@@ -991,6 +993,7 @@ struct dwc2_hregs_backup {
  * @ctrl_buff:          Buffer for EP0 control requests.
  * @ctrl_req:           Request for EP0 control packets.
  * @ep0_state:          EP0 control transfers state
+ * @delayed_status:		true when gadget driver asks for delayed status
  * @test_mode:          USB test mode requested by the host
  * @remote_wakeup_allowed: True if device is allowed to wake-up host by
  *                      remote-wakeup signalling
@@ -1045,6 +1048,7 @@ struct dwc2_hsotg {
 	unsigned int gadget_enabled:1;
 	unsigned int ll_hw_enabled:1;
 	unsigned int hibernated:1;
+	unsigned int reset_phy_on_wake:1;
 	u16 frame_number;
 
 	struct phy *phy;
@@ -1052,7 +1056,6 @@ struct dwc2_hsotg {
 	struct dwc2_hsotg_plat *plat;
 	struct regulator_bulk_data supplies[DWC2_NUM_SUPPLIES];
 	struct regulator *vbus_supply;
-	u32 phyif;
 
 	spinlock_t lock;
 	void *priv;
@@ -1147,6 +1150,7 @@ struct dwc2_hsotg {
 
 	struct delayed_work start_work;
 	struct delayed_work reset_work;
+	struct work_struct phy_reset_work;
 	u8 otg_port;
 	u32 *frame_list;
 	dma_addr_t frame_list_dma;
@@ -1172,6 +1176,7 @@ struct dwc2_hsotg {
 	void *ep0_buff;
 	void *ctrl_buff;
 	enum dwc2_ep0_state ep0_state;
+	unsigned delayed_status : 1;
 	u8 test_mode;
 
 	dma_addr_t setup_desc_dma[2];
@@ -1283,6 +1288,8 @@ int dwc2_exit_partial_power_down(struct dwc2_hsotg *hsotg, bool restore);
 int dwc2_enter_hibernation(struct dwc2_hsotg *hsotg, int is_host);
 int dwc2_exit_hibernation(struct dwc2_hsotg *hsotg, int rem_wakeup,
 		int reset, int is_host);
+void dwc2_init_fs_ls_pclk_sel(struct dwc2_hsotg *hsotg);
+int dwc2_phy_init(struct dwc2_hsotg *hsotg, bool select_phy);
 
 void dwc2_force_mode(struct dwc2_hsotg *hsotg, bool host);
 void dwc2_force_dr_mode(struct dwc2_hsotg *hsotg);
@@ -1431,6 +1438,8 @@ int dwc2_restore_host_registers(struct dwc2_hsotg *hsotg);
 int dwc2_host_enter_hibernation(struct dwc2_hsotg *hsotg);
 int dwc2_host_exit_hibernation(struct dwc2_hsotg *hsotg,
 			       int rem_wakeup, int reset);
+static inline void dwc2_host_schedule_phy_reset(struct dwc2_hsotg *hsotg)
+{ schedule_work(&hsotg->phy_reset_work); }
 #else
 static inline int dwc2_hcd_get_frame_number(struct dwc2_hsotg *hsotg)
 { return 0; }
@@ -1454,6 +1463,7 @@ static inline int dwc2_host_enter_hibernation(struct dwc2_hsotg *hsotg)
 static inline int dwc2_host_exit_hibernation(struct dwc2_hsotg *hsotg,
 					     int rem_wakeup, int reset)
 { return 0; }
+static inline void dwc2_host_schedule_phy_reset(struct dwc2_hsotg *hsotg) {}
 
 #endif
 
diff --git a/drivers/usb/dwc2/core_intr.c b/drivers/usb/dwc2/core_intr.c
index 19ae2595f1c3..6af6add3d4c0 100644
--- a/drivers/usb/dwc2/core_intr.c
+++ b/drivers/usb/dwc2/core_intr.c
@@ -435,6 +435,18 @@ static void dwc2_handle_wakeup_detected_intr(struct dwc2_hsotg *hsotg)
 			/* Restart the Phy Clock */
 			pcgcctl &= ~PCGCTL_STOPPCLK;
 			dwc2_writel(hsotg, pcgcctl, PCGCTL);
+
+			/*
+			 * If we've got this quirk then the PHY is stuck upon
+			 * wakeup.  Assert reset.  This will propagate out and
+			 * eventually we'll re-enumerate the device.  Not great
+			 * but the best we can do.  We can't call phy_reset()
+			 * at interrupt time but there's no hurry, so we'll
+			 * schedule it for later.
+			 */
+			if (hsotg->reset_phy_on_wake)
+				dwc2_host_schedule_phy_reset(hsotg);
+
 			mod_timer(&hsotg->wkp_timer,
 				  jiffies + msecs_to_jiffies(71));
 		} else {
diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index 6812a8a3a98b..16ffd9fd9361 100644
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -27,6 +27,8 @@
 #include <linux/usb/ch9.h>
 #include <linux/usb/gadget.h>
 #include <linux/usb/phy.h>
+#include <linux/usb/composite.h>
+
 
 #include "core.h"
 #include "hw.h"
@@ -714,13 +716,11 @@ static unsigned int dwc2_gadget_get_chain_limit(struct dwc2_hsotg_ep *hs_ep)
 	unsigned int maxsize;
 
 	if (is_isoc)
-		maxsize = hs_ep->dir_in ? DEV_DMA_ISOC_TX_NBYTES_LIMIT :
-					   DEV_DMA_ISOC_RX_NBYTES_LIMIT;
+		maxsize = (hs_ep->dir_in ? DEV_DMA_ISOC_TX_NBYTES_LIMIT :
+					   DEV_DMA_ISOC_RX_NBYTES_LIMIT) *
+					   MAX_DMA_DESC_NUM_HS_ISOC;
 	else
-		maxsize = DEV_DMA_NBYTES_LIMIT;
-
-	/* Above size of one descriptor was chosen, multiple it */
-	maxsize *= MAX_DMA_DESC_NUM_GENERIC;
+		maxsize = DEV_DMA_NBYTES_LIMIT * MAX_DMA_DESC_NUM_GENERIC;
 
 	return maxsize;
 }
@@ -932,7 +932,7 @@ static int dwc2_gadget_fill_isoc_desc(struct dwc2_hsotg_ep *hs_ep,
 
 	/* Update index of last configured entry in the chain */
 	hs_ep->next_desc++;
-	if (hs_ep->next_desc >= MAX_DMA_DESC_NUM_GENERIC)
+	if (hs_ep->next_desc >= MAX_DMA_DESC_NUM_HS_ISOC)
 		hs_ep->next_desc = 0;
 
 	return 0;
@@ -964,7 +964,7 @@ static void dwc2_gadget_start_isoc_ddma(struct dwc2_hsotg_ep *hs_ep)
 	}
 
 	/* Initialize descriptor chain by Host Busy status */
-	for (i = 0; i < MAX_DMA_DESC_NUM_GENERIC; i++) {
+	for (i = 0; i < MAX_DMA_DESC_NUM_HS_ISOC; i++) {
 		desc = &hs_ep->desc_list[i];
 		desc->status = 0;
 		desc->status |= (DEV_DMA_BUFF_STS_HBUSY
@@ -1446,6 +1446,11 @@ static int dwc2_hsotg_ep_queue(struct usb_ep *ep, struct usb_request *req,
 		return 0;
 	}
 
+	/* Change EP direction if status phase request is after data out */
+	if (!hs_ep->index && !req->length && !hs_ep->dir_in &&
+	    hs->ep0_state == DWC2_EP0_DATA_OUT)
+		hs_ep->dir_in = 1;
+
 	if (first) {
 		if (!hs_ep->isochronous) {
 			dwc2_hsotg_start_req(hs, hs_ep, hs_req, false);
@@ -1938,6 +1943,10 @@ static void dwc2_hsotg_process_control(struct dwc2_hsotg *hsotg,
 			dev_dbg(hsotg->dev, "driver->setup() ret %d\n", ret);
 	}
 
+	hsotg->delayed_status = false;
+	if (ret == USB_GADGET_DELAYED_STATUS)
+		hsotg->delayed_status = true;
+
 	/*
 	 * the request is either unhandlable, or is not formatted correctly
 	 * so respond with a STALL for the status stage to indicate failure.
@@ -2157,12 +2166,17 @@ static void dwc2_gadget_complete_isoc_request_ddma(struct dwc2_hsotg_ep *hs_ep)
 			 */
 			if (!hs_ep->dir_in && ureq->length & 0x3)
 				ureq->actual += 4 - (ureq->length & 0x3);
+
+			/* Set actual frame number for completed transfers */
+			ureq->frame_number =
+				(desc_sts & DEV_DMA_ISOC_FRNUM_MASK) >>
+				DEV_DMA_ISOC_FRNUM_SHIFT;
 		}
 
 		dwc2_hsotg_complete_request(hsotg, hs_ep, hs_req, 0);
 
 		hs_ep->compl_desc++;
-		if (hs_ep->compl_desc > (MAX_DMA_DESC_NUM_GENERIC - 1))
+		if (hs_ep->compl_desc > (MAX_DMA_DESC_NUM_HS_ISOC - 1))
 			hs_ep->compl_desc = 0;
 		desc_sts = hs_ep->desc_list[hs_ep->compl_desc].status;
 	}
@@ -2311,6 +2325,7 @@ static unsigned int dwc2_gadget_get_xfersize_ddma(struct dwc2_hsotg_ep *hs_ep)
 		if (status & DEV_DMA_STS_MASK)
 			dev_err(hsotg->dev, "descriptor %d closed with %x\n",
 				i, status & DEV_DMA_STS_MASK);
+		desc++;
 	}
 
 	return bytes_rem;
@@ -2387,8 +2402,8 @@ static void dwc2_hsotg_handle_outdone(struct dwc2_hsotg *hsotg, int epnum)
 	if (!using_desc_dma(hsotg) && epnum == 0 &&
 	    hsotg->ep0_state == DWC2_EP0_DATA_OUT) {
 		/* Move to STATUS IN */
-		dwc2_hsotg_ep0_zlp(hsotg, true);
-		return;
+		if (!hsotg->delayed_status)
+			dwc2_hsotg_ep0_zlp(hsotg, true);
 	}
 
 	/*
@@ -3053,8 +3068,20 @@ static void dwc2_hsotg_epint(struct dwc2_hsotg *hsotg, unsigned int idx,
 		/* Safety check EP0 state when STSPHSERCVD asserted */
 		if (hsotg->ep0_state == DWC2_EP0_DATA_OUT) {
 			/* Move to STATUS IN for DDMA */
-			if (using_desc_dma(hsotg))
-				dwc2_hsotg_ep0_zlp(hsotg, true);
+			if (using_desc_dma(hsotg)) {
+				if (!hsotg->delayed_status)
+					dwc2_hsotg_ep0_zlp(hsotg, true);
+				else
+				/* In case of 3 stage Control Write with delayed
+				 * status, when Status IN transfer started
+				 * before STSPHSERCVD asserted, NAKSTS bit not
+				 * cleared by CNAK in dwc2_hsotg_start_req()
+				 * function. Clear now NAKSTS to allow complete
+				 * transfer.
+				 */
+					dwc2_set_bit(hsotg, DIEPCTL(0),
+						     DXEPCTL_CNAK);
+			}
 		}
 
 	}
@@ -3314,21 +3341,14 @@ void dwc2_hsotg_core_init_disconnected(struct dwc2_hsotg *hsotg,
 
 	/* keep other bits untouched (so e.g. forced modes are not lost) */
 	usbcfg = dwc2_readl(hsotg, GUSBCFG);
-	usbcfg &= ~(GUSBCFG_TOUTCAL_MASK | GUSBCFG_PHYIF16 | GUSBCFG_SRPCAP |
-		GUSBCFG_HNPCAP | GUSBCFG_USBTRDTIM_MASK);
-
-	if (hsotg->params.phy_type == DWC2_PHY_TYPE_PARAM_FS &&
-	    (hsotg->params.speed == DWC2_SPEED_PARAM_FULL ||
-	     hsotg->params.speed == DWC2_SPEED_PARAM_LOW)) {
-		/* FS/LS Dedicated Transceiver Interface */
-		usbcfg |= GUSBCFG_PHYSEL;
-	} else {
-		/* set the PLL on, remove the HNP/SRP and set the PHY */
-		val = (hsotg->phyif == GUSBCFG_PHYIF8) ? 9 : 5;
-		usbcfg |= hsotg->phyif | GUSBCFG_TOUTCAL(7) |
-			(val << GUSBCFG_USBTRDTIM_SHIFT);
-	}
-	dwc2_writel(hsotg, usbcfg, GUSBCFG);
+	usbcfg &= ~GUSBCFG_TOUTCAL_MASK;
+	usbcfg |= GUSBCFG_TOUTCAL(7);
+
+	/* remove the HNP/SRP and set the PHY */
+	usbcfg &= ~(GUSBCFG_SRPCAP | GUSBCFG_HNPCAP);
+        dwc2_writel(hsotg, usbcfg, GUSBCFG);
+
+	dwc2_phy_init(hsotg, true);
 
 	dwc2_hsotg_init_fifo(hsotg);
 
@@ -3899,6 +3919,7 @@ static int dwc2_hsotg_ep_enable(struct usb_ep *ep,
 	unsigned int i, val, size;
 	int ret = 0;
 	unsigned char ep_type;
+	int desc_num;
 
 	dev_dbg(hsotg->dev,
 		"%s: ep %s: a 0x%02x, attr 0x%02x, mps 0x%04x, intr %d\n",
@@ -3945,11 +3966,15 @@ static int dwc2_hsotg_ep_enable(struct usb_ep *ep,
 	dev_dbg(hsotg->dev, "%s: read DxEPCTL=0x%08x from 0x%08x\n",
 		__func__, epctrl, epctrl_reg);
 
+	if (using_desc_dma(hsotg) && ep_type == USB_ENDPOINT_XFER_ISOC)
+		desc_num = MAX_DMA_DESC_NUM_HS_ISOC;
+	else
+		desc_num = MAX_DMA_DESC_NUM_GENERIC;
+
 	/* Allocate DMA descriptor chain for non-ctrl endpoints */
 	if (using_desc_dma(hsotg) && !hs_ep->desc_list) {
 		hs_ep->desc_list = dmam_alloc_coherent(hsotg->dev,
-			MAX_DMA_DESC_NUM_GENERIC *
-			sizeof(struct dwc2_dma_desc),
+			desc_num * sizeof(struct dwc2_dma_desc),
 			&hs_ep->desc_list_dma, GFP_ATOMIC);
 		if (!hs_ep->desc_list) {
 			ret = -ENOMEM;
@@ -4092,7 +4117,7 @@ error1:
 
 error2:
 	if (ret && using_desc_dma(hsotg) && hs_ep->desc_list) {
-		dmam_free_coherent(hsotg->dev, MAX_DMA_DESC_NUM_GENERIC *
+		dmam_free_coherent(hsotg->dev, desc_num *
 			sizeof(struct dwc2_dma_desc),
 			hs_ep->desc_list, hs_ep->desc_list_dma);
 		hs_ep->desc_list = NULL;
@@ -4328,8 +4353,6 @@ static const struct usb_ep_ops dwc2_hsotg_ep_ops = {
  */
 static void dwc2_hsotg_init(struct dwc2_hsotg *hsotg)
 {
-	u32 trdtim;
-	u32 usbcfg;
 	/* unmask subset of endpoint interrupts */
 
 	dwc2_writel(hsotg, DIEPMSK_TIMEOUTMSK | DIEPMSK_AHBERRMSK |
@@ -4353,17 +4376,6 @@ static void dwc2_hsotg_init(struct dwc2_hsotg *hsotg)
 
 	dwc2_hsotg_init_fifo(hsotg);
 
-	/* keep other bits untouched (so e.g. forced modes are not lost) */
-	usbcfg = dwc2_readl(hsotg, GUSBCFG);
-	usbcfg &= ~(GUSBCFG_TOUTCAL_MASK | GUSBCFG_PHYIF16 | GUSBCFG_SRPCAP |
-		GUSBCFG_HNPCAP | GUSBCFG_USBTRDTIM_MASK);
-
-	/* set the PLL on, remove the HNP/SRP and set the PHY */
-	trdtim = (hsotg->phyif == GUSBCFG_PHYIF8) ? 9 : 5;
-	usbcfg |= hsotg->phyif | GUSBCFG_TOUTCAL(7) |
-		(trdtim << GUSBCFG_USBTRDTIM_SHIFT);
-	dwc2_writel(hsotg, usbcfg, GUSBCFG);
-
 	if (using_dma(hsotg))
 		dwc2_set_bit(hsotg, GAHBCFG, GAHBCFG_DMA_EN);
 }
@@ -5073,6 +5085,7 @@ void dwc2_gadget_init_lpm(struct dwc2_hsotg *hsotg)
 	val |= hsotg->params.lpm_clock_gating ? GLPMCFG_ENBLSLPM : 0;
 	val |= hsotg->params.hird_threshold << GLPMCFG_HIRD_THRES_SHIFT;
 	val |= hsotg->params.besl ? GLPMCFG_ENBESL : 0;
+	val |= GLPMCFG_LPM_REJECT_CTRL_CONTROL;
 	val |= GLPMCFG_LPM_ACCEPT_CTRL_ISOC;
 	dwc2_writel(hsotg, val, GLPMCFG);
 	dev_dbg(hsotg->dev, "GLPMCFG=0x%08x\n", dwc2_readl(hsotg, GLPMCFG));
diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c
index 3f087962f498..b50ec3714fd8 100644
--- a/drivers/usb/dwc2/hcd.c
+++ b/drivers/usb/dwc2/hcd.c
@@ -97,196 +97,6 @@ static void dwc2_enable_common_interrupts(struct dwc2_hsotg *hsotg)
 	dwc2_writel(hsotg, intmsk, GINTMSK);
 }
 
-/*
- * Initializes the FSLSPClkSel field of the HCFG register depending on the
- * PHY type
- */
-static void dwc2_init_fs_ls_pclk_sel(struct dwc2_hsotg *hsotg)
-{
-	u32 hcfg, val;
-
-	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) ||
-	    hsotg->params.phy_type == DWC2_PHY_TYPE_PARAM_FS) {
-		/* Full speed PHY */
-		val = HCFG_FSLSPCLKSEL_48_MHZ;
-	} else {
-		/* High speed PHY running at full speed or high speed */
-		val = HCFG_FSLSPCLKSEL_30_60_MHZ;
-	}
-
-	dev_dbg(hsotg->dev, "Initializing HCFG.FSLSPClkSel to %08x\n", val);
-	hcfg = dwc2_readl(hsotg, HCFG);
-	hcfg &= ~HCFG_FSLSPCLKSEL_MASK;
-	hcfg |= val << HCFG_FSLSPCLKSEL_SHIFT;
-	dwc2_writel(hsotg, hcfg, HCFG);
-}
-
-static int dwc2_fs_phy_init(struct dwc2_hsotg *hsotg, bool select_phy)
-{
-	u32 usbcfg, ggpio, i2cctl;
-	int retval = 0;
-
-	/*
-	 * core_init() is now called on every switch so only call the
-	 * following for the first time through
-	 */
-	if (select_phy) {
-		dev_dbg(hsotg->dev, "FS PHY selected\n");
-
-		usbcfg = dwc2_readl(hsotg, GUSBCFG);
-		if (!(usbcfg & GUSBCFG_PHYSEL)) {
-			usbcfg |= GUSBCFG_PHYSEL;
-			dwc2_writel(hsotg, usbcfg, GUSBCFG);
-
-			/* Reset after a PHY select */
-			retval = dwc2_core_reset(hsotg, false);
-
-			if (retval) {
-				dev_err(hsotg->dev,
-					"%s: Reset failed, aborting", __func__);
-				return retval;
-			}
-		}
-
-		if (hsotg->params.activate_stm_fs_transceiver) {
-			ggpio = dwc2_readl(hsotg, GGPIO);
-			if (!(ggpio & GGPIO_STM32_OTG_GCCFG_PWRDWN)) {
-				dev_dbg(hsotg->dev, "Activating transceiver\n");
-				/*
-				 * STM32F4x9 uses the GGPIO register as general
-				 * core configuration register.
-				 */
-				ggpio |= GGPIO_STM32_OTG_GCCFG_PWRDWN;
-				dwc2_writel(hsotg, ggpio, GGPIO);
-			}
-		}
-	}
-
-	/*
-	 * Program DCFG.DevSpd or HCFG.FSLSPclkSel to 48Mhz in FS. Also
-	 * do this on HNP Dev/Host mode switches (done in dev_init and
-	 * host_init).
-	 */
-	if (dwc2_is_host_mode(hsotg))
-		dwc2_init_fs_ls_pclk_sel(hsotg);
-
-	if (hsotg->params.i2c_enable) {
-		dev_dbg(hsotg->dev, "FS PHY enabling I2C\n");
-
-		/* Program GUSBCFG.OtgUtmiFsSel to I2C */
-		usbcfg = dwc2_readl(hsotg, GUSBCFG);
-		usbcfg |= GUSBCFG_OTG_UTMI_FS_SEL;
-		dwc2_writel(hsotg, usbcfg, GUSBCFG);
-
-		/* Program GI2CCTL.I2CEn */
-		i2cctl = dwc2_readl(hsotg, GI2CCTL);
-		i2cctl &= ~GI2CCTL_I2CDEVADDR_MASK;
-		i2cctl |= 1 << GI2CCTL_I2CDEVADDR_SHIFT;
-		i2cctl &= ~GI2CCTL_I2CEN;
-		dwc2_writel(hsotg, i2cctl, GI2CCTL);
-		i2cctl |= GI2CCTL_I2CEN;
-		dwc2_writel(hsotg, i2cctl, GI2CCTL);
-	}
-
-	return retval;
-}
-
-static int dwc2_hs_phy_init(struct dwc2_hsotg *hsotg, bool select_phy)
-{
-	u32 usbcfg, usbcfg_old;
-	int retval = 0;
-
-	if (!select_phy)
-		return 0;
-
-	usbcfg = dwc2_readl(hsotg, GUSBCFG);
-	usbcfg_old = usbcfg;
-
-	/*
-	 * HS PHY parameters. These parameters are preserved during soft reset
-	 * so only program the first time. Do a soft reset immediately after
-	 * setting phyif.
-	 */
-	switch (hsotg->params.phy_type) {
-	case DWC2_PHY_TYPE_PARAM_ULPI:
-		/* ULPI interface */
-		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)
-			usbcfg |= GUSBCFG_DDRSEL;
-
-		/* Set external VBUS indicator as needed. */
-		if (hsotg->params.oc_disable)
-			usbcfg |= (GUSBCFG_ULPI_INT_VBUS_IND |
-				   GUSBCFG_INDICATORPASSTHROUGH);
-		break;
-	case DWC2_PHY_TYPE_PARAM_UTMI:
-		/* UTMI+ interface */
-		dev_dbg(hsotg->dev, "HS UTMI+ PHY selected\n");
-		usbcfg &= ~(GUSBCFG_ULPI_UTMI_SEL | GUSBCFG_PHYIF16);
-		if (hsotg->params.phy_utmi_width == 16)
-			usbcfg |= GUSBCFG_PHYIF16;
-		break;
-	default:
-		dev_err(hsotg->dev, "FS PHY selected at HS!\n");
-		break;
-	}
-
-	if (usbcfg != usbcfg_old) {
-		dwc2_writel(hsotg, usbcfg, GUSBCFG);
-
-		/* Reset after setting the PHY parameters */
-		retval = dwc2_core_reset(hsotg, false);
-		if (retval) {
-			dev_err(hsotg->dev,
-				"%s: Reset failed, aborting", __func__);
-			return retval;
-		}
-	}
-
-	return retval;
-}
-
-static int dwc2_phy_init(struct dwc2_hsotg *hsotg, bool select_phy)
-{
-	u32 usbcfg;
-	int retval = 0;
-
-	if ((hsotg->params.speed == DWC2_SPEED_PARAM_FULL ||
-	     hsotg->params.speed == DWC2_SPEED_PARAM_LOW) &&
-	    hsotg->params.phy_type == DWC2_PHY_TYPE_PARAM_FS) {
-		/* If FS/LS mode with FS/LS PHY */
-		retval = dwc2_fs_phy_init(hsotg, select_phy);
-		if (retval)
-			return retval;
-	} else {
-		/* High speed PHY */
-		retval = dwc2_hs_phy_init(hsotg, select_phy);
-		if (retval)
-			return retval;
-	}
-
-	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) {
-		dev_dbg(hsotg->dev, "Setting ULPI FSLS\n");
-		usbcfg = dwc2_readl(hsotg, GUSBCFG);
-		usbcfg |= GUSBCFG_ULPI_FS_LS;
-		usbcfg |= GUSBCFG_ULPI_CLK_SUSP_M;
-		dwc2_writel(hsotg, usbcfg, GUSBCFG);
-	} else {
-		usbcfg = dwc2_readl(hsotg, GUSBCFG);
-		usbcfg &= ~GUSBCFG_ULPI_FS_LS;
-		usbcfg &= ~GUSBCFG_ULPI_CLK_SUSP_M;
-		dwc2_writel(hsotg, usbcfg, GUSBCFG);
-	}
-
-	return retval;
-}
-
 static int dwc2_gahbcfg_init(struct dwc2_hsotg *hsotg)
 {
 	u32 ahbcfg = dwc2_readl(hsotg, GAHBCFG);
@@ -2437,25 +2247,31 @@ static void dwc2_core_host_init(struct dwc2_hsotg *hsotg)
 		num_channels = hsotg->params.host_channels;
 		for (i = 0; i < num_channels; i++) {
 			hcchar = dwc2_readl(hsotg, HCCHAR(i));
-			hcchar &= ~HCCHAR_CHENA;
-			hcchar |= HCCHAR_CHDIS;
-			hcchar &= ~HCCHAR_EPDIR;
-			dwc2_writel(hsotg, hcchar, HCCHAR(i));
+			if (hcchar & HCCHAR_CHENA) {
+				hcchar &= ~HCCHAR_CHENA;
+				hcchar |= HCCHAR_CHDIS;
+				hcchar &= ~HCCHAR_EPDIR;
+				dwc2_writel(hsotg, hcchar, HCCHAR(i));
+			}
 		}
 
 		/* Halt all channels to put them into a known state */
 		for (i = 0; i < num_channels; i++) {
 			hcchar = dwc2_readl(hsotg, HCCHAR(i));
-			hcchar |= HCCHAR_CHENA | HCCHAR_CHDIS;
-			hcchar &= ~HCCHAR_EPDIR;
-			dwc2_writel(hsotg, hcchar, HCCHAR(i));
-			dev_dbg(hsotg->dev, "%s: Halt channel %d\n",
-				__func__, i);
-
-			if (dwc2_hsotg_wait_bit_clear(hsotg, HCCHAR(i),
-						      HCCHAR_CHENA, 1000)) {
-				dev_warn(hsotg->dev, "Unable to clear enable on channel %d\n",
-					 i);
+			if (hcchar & HCCHAR_CHENA) {
+				hcchar |= HCCHAR_CHENA | HCCHAR_CHDIS;
+				hcchar &= ~HCCHAR_EPDIR;
+				dwc2_writel(hsotg, hcchar, HCCHAR(i));
+				dev_dbg(hsotg->dev, "%s: Halt channel %d\n",
+					__func__, i);
+
+				if (dwc2_hsotg_wait_bit_clear(hsotg, HCCHAR(i),
+							      HCCHAR_CHENA,
+							      1000)) {
+					dev_warn(hsotg->dev,
+						 "Unable to clear enable on channel %d\n",
+						 i);
+				}
 			}
 		}
 	}
@@ -4376,6 +4192,17 @@ static void dwc2_hcd_reset_func(struct work_struct *work)
 	spin_unlock_irqrestore(&hsotg->lock, flags);
 }
 
+static void dwc2_hcd_phy_reset_func(struct work_struct *work)
+{
+	struct dwc2_hsotg *hsotg = container_of(work, struct dwc2_hsotg,
+						phy_reset_work);
+	int ret;
+
+	ret = phy_reset(hsotg->phy);
+	if (ret)
+		dev_warn(hsotg->dev, "PHY reset failed\n");
+}
+
 /*
  * =========================================================================
  *  Linux HC Driver Functions
@@ -4471,6 +4298,7 @@ static int _dwc2_hcd_suspend(struct usb_hcd *hcd)
 	unsigned long flags;
 	int ret = 0;
 	u32 hprt0;
+	u32 pcgctl;
 
 	spin_lock_irqsave(&hsotg->lock, flags);
 
@@ -4486,7 +4314,7 @@ static int _dwc2_hcd_suspend(struct usb_hcd *hcd)
 	if (hsotg->op_state == OTG_STATE_B_PERIPHERAL)
 		goto unlock;
 
-	if (hsotg->params.power_down != DWC2_POWER_DOWN_PARAM_PARTIAL)
+	if (hsotg->params.power_down > DWC2_POWER_DOWN_PARAM_PARTIAL)
 		goto skip_power_saving;
 
 	/*
@@ -4495,21 +4323,35 @@ static int _dwc2_hcd_suspend(struct usb_hcd *hcd)
 	 */
 	if (!hsotg->bus_suspended) {
 		hprt0 = dwc2_read_hprt0(hsotg);
-		hprt0 |= HPRT0_SUSP;
-		hprt0 &= ~HPRT0_PWR;
-		dwc2_writel(hsotg, hprt0, HPRT0);
-		spin_unlock_irqrestore(&hsotg->lock, flags);
-		dwc2_vbus_supply_exit(hsotg);
-		spin_lock_irqsave(&hsotg->lock, flags);
+		if (hprt0 & HPRT0_CONNSTS) {
+			hprt0 |= HPRT0_SUSP;
+			if (hsotg->params.power_down == DWC2_POWER_DOWN_PARAM_PARTIAL)
+				hprt0 &= ~HPRT0_PWR;
+			dwc2_writel(hsotg, hprt0, HPRT0);
+		}
+		if (hsotg->params.power_down == DWC2_POWER_DOWN_PARAM_PARTIAL) {
+			spin_unlock_irqrestore(&hsotg->lock, flags);
+			dwc2_vbus_supply_exit(hsotg);
+			spin_lock_irqsave(&hsotg->lock, flags);
+		} else {
+			pcgctl = readl(hsotg->regs + PCGCTL);
+			pcgctl |= PCGCTL_STOPPCLK;
+			writel(pcgctl, hsotg->regs + PCGCTL);
+		}
 	}
 
-	/* Enter partial_power_down */
-	ret = dwc2_enter_partial_power_down(hsotg);
-	if (ret) {
-		if (ret != -ENOTSUPP)
-			dev_err(hsotg->dev,
-				"enter partial_power_down failed\n");
-		goto skip_power_saving;
+	if (hsotg->params.power_down == DWC2_POWER_DOWN_PARAM_PARTIAL) {
+		/* Enter partial_power_down */
+		ret = dwc2_enter_partial_power_down(hsotg);
+		if (ret) {
+			if (ret != -ENOTSUPP)
+				dev_err(hsotg->dev,
+					"enter partial_power_down failed\n");
+			goto skip_power_saving;
+		}
+
+		/* After entering partial_power_down, hardware is no more accessible */
+		clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
 	}
 
 	/* Ask phy to be suspended */
@@ -4519,9 +4361,6 @@ static int _dwc2_hcd_suspend(struct usb_hcd *hcd)
 		spin_lock_irqsave(&hsotg->lock, flags);
 	}
 
-	/* After entering partial_power_down, hardware is no more accessible */
-	clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
-
 skip_power_saving:
 	hsotg->lx_state = DWC2_L2;
 unlock:
@@ -4534,6 +4373,7 @@ static int _dwc2_hcd_resume(struct usb_hcd *hcd)
 {
 	struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd);
 	unsigned long flags;
+	u32 pcgctl;
 	int ret = 0;
 
 	spin_lock_irqsave(&hsotg->lock, flags);
@@ -4544,18 +4384,12 @@ static int _dwc2_hcd_resume(struct usb_hcd *hcd)
 	if (hsotg->lx_state != DWC2_L2)
 		goto unlock;
 
-	if (hsotg->params.power_down != DWC2_POWER_DOWN_PARAM_PARTIAL) {
+	if (hsotg->params.power_down > DWC2_POWER_DOWN_PARAM_PARTIAL) {
 		hsotg->lx_state = DWC2_L0;
 		goto unlock;
 	}
 
 	/*
-	 * Set HW accessible bit before powering on the controller
-	 * since an interrupt may rise.
-	 */
-	set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
-
-	/*
 	 * Enable power if not already done.
 	 * This must not be spinlocked since duration
 	 * of this call is unknown.
@@ -4566,10 +4400,23 @@ static int _dwc2_hcd_resume(struct usb_hcd *hcd)
 		spin_lock_irqsave(&hsotg->lock, flags);
 	}
 
-	/* Exit partial_power_down */
-	ret = dwc2_exit_partial_power_down(hsotg, true);
-	if (ret && (ret != -ENOTSUPP))
-		dev_err(hsotg->dev, "exit partial_power_down failed\n");
+	if (hsotg->params.power_down == DWC2_POWER_DOWN_PARAM_PARTIAL) {
+		/*
+		 * Set HW accessible bit before powering on the controller
+		 * since an interrupt may rise.
+		 */
+		set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
+
+
+		/* Exit partial_power_down */
+		ret = dwc2_exit_partial_power_down(hsotg, true);
+		if (ret && (ret != -ENOTSUPP))
+			dev_err(hsotg->dev, "exit partial_power_down failed\n");
+	} else {
+		pcgctl = readl(hsotg->regs + PCGCTL);
+		pcgctl &= ~PCGCTL_STOPPCLK;
+		writel(pcgctl, hsotg->regs + PCGCTL);
+	}
 
 	hsotg->lx_state = DWC2_L0;
 
@@ -4581,10 +4428,12 @@ static int _dwc2_hcd_resume(struct usb_hcd *hcd)
 		spin_unlock_irqrestore(&hsotg->lock, flags);
 		dwc2_port_resume(hsotg);
 	} else {
-		dwc2_vbus_supply_init(hsotg);
+		if (hsotg->params.power_down == DWC2_POWER_DOWN_PARAM_PARTIAL) {
+			dwc2_vbus_supply_init(hsotg);
 
-		/* Wait for controller to correctly update D+/D- level */
-		usleep_range(3000, 5000);
+			/* Wait for controller to correctly update D+/D- level */
+			usleep_range(3000, 5000);
+		}
 
 		/*
 		 * Clear Port Enable and Port Status changes.
@@ -5130,6 +4979,8 @@ static void dwc2_hcd_free(struct dwc2_hsotg *hsotg)
 		destroy_workqueue(hsotg->wq_otg);
 	}
 
+	cancel_work_sync(&hsotg->phy_reset_work);
+
 	del_timer(&hsotg->wkp_timer);
 }
 
@@ -5271,11 +5122,10 @@ int dwc2_hcd_init(struct dwc2_hsotg *hsotg)
 		hsotg->hc_ptr_array[i] = channel;
 	}
 
-	/* Initialize hsotg start work */
+	/* Initialize work */
 	INIT_DELAYED_WORK(&hsotg->start_work, dwc2_hcd_start_func);
-
-	/* Initialize port reset work */
 	INIT_DELAYED_WORK(&hsotg->reset_work, dwc2_hcd_reset_func);
+	INIT_WORK(&hsotg->phy_reset_work, dwc2_hcd_phy_reset_func);
 
 	/*
 	 * Allocate space for storing data on status transactions. Normally no
diff --git a/drivers/usb/dwc2/hw.h b/drivers/usb/dwc2/hw.h
index 98af924a9a5c..510e87ec0be8 100644
--- a/drivers/usb/dwc2/hw.h
+++ b/drivers/usb/dwc2/hw.h
@@ -310,12 +310,12 @@
 #define GHWCFG4_NUM_DEV_MODE_CTRL_EP_SHIFT	16
 #define GHWCFG4_UTMI_PHY_DATA_WIDTH_MASK	(0x3 << 14)
 #define GHWCFG4_UTMI_PHY_DATA_WIDTH_SHIFT	14
-#define GHWCFG4_ACG_SUPPORTED			BIT(12)
-#define GHWCFG4_IPG_ISOC_SUPPORTED		BIT(11)
-#define GHWCFG4_SERVICE_INTERVAL_SUPPORTED      BIT(10)
 #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_ACG_SUPPORTED			BIT(12)
+#define GHWCFG4_IPG_ISOC_SUPPORTED		BIT(11)
+#define GHWCFG4_SERVICE_INTERVAL_SUPPORTED      BIT(10)
 #define GHWCFG4_XHIBER				BIT(7)
 #define GHWCFG4_HIBER				BIT(6)
 #define GHWCFG4_MIN_AHB_FREQ			BIT(5)
@@ -333,7 +333,7 @@
 #define GLPMCFG_SNDLPM			BIT(24)
 #define GLPMCFG_RETRY_CNT_MASK		(0x7 << 21)
 #define GLPMCFG_RETRY_CNT_SHIFT		21
-#define GLPMCFG_LPM_ACCEPT_CTRL_CONTROL	BIT(21)
+#define GLPMCFG_LPM_REJECT_CTRL_CONTROL	BIT(21)
 #define GLPMCFG_LPM_ACCEPT_CTRL_ISOC	BIT(22)
 #define GLPMCFG_LPM_CHNL_INDX_MASK	(0xf << 17)
 #define GLPMCFG_LPM_CHNL_INDX_SHIFT	17
diff --git a/drivers/usb/dwc2/params.c b/drivers/usb/dwc2/params.c
index 24ff5f21cb25..6900eea57526 100644
--- a/drivers/usb/dwc2/params.c
+++ b/drivers/usb/dwc2/params.c
@@ -121,6 +121,16 @@ static void dwc2_set_amlogic_params(struct dwc2_hsotg *hsotg)
 	p->power_down = DWC2_POWER_DOWN_PARAM_NONE;
 }
 
+static void dwc2_set_amlogic_g12a_params(struct dwc2_hsotg *hsotg)
+{
+	struct dwc2_core_params *p = &hsotg->params;
+
+	p->lpm = false;
+	p->lpm_clock_gating = false;
+	p->besl = false;
+	p->hird_threshold_en = false;
+}
+
 static void dwc2_set_amcc_params(struct dwc2_hsotg *hsotg)
 {
 	struct dwc2_core_params *p = &hsotg->params;
@@ -167,6 +177,8 @@ const struct of_device_id dwc2_of_match_table[] = {
 	  .data = dwc2_set_amlogic_params },
 	{ .compatible = "amlogic,meson-gxbb-usb",
 	  .data = dwc2_set_amlogic_params },
+	{ .compatible = "amlogic,meson-g12a-usb",
+	  .data = dwc2_set_amlogic_g12a_params },
 	{ .compatible = "amcc,dwc-otg", .data = dwc2_set_amcc_params },
 	{ .compatible = "st,stm32f4x9-fsotg",
 	  .data = dwc2_set_stm32f4x9_fsotg_params },
@@ -273,6 +285,23 @@ static void dwc2_set_param_power_down(struct dwc2_hsotg *hsotg)
 	hsotg->params.power_down = val;
 }
 
+static void dwc2_set_param_lpm(struct dwc2_hsotg *hsotg)
+{
+	struct dwc2_core_params *p = &hsotg->params;
+
+	p->lpm = hsotg->hw_params.lpm_mode;
+	if (p->lpm) {
+		p->lpm_clock_gating = true;
+		p->besl = true;
+		p->hird_threshold_en = true;
+		p->hird_threshold = 4;
+	} else {
+		p->lpm_clock_gating = false;
+		p->besl = false;
+		p->hird_threshold_en = false;
+	}
+}
+
 /**
  * dwc2_set_default_params() - Set all core parameters to their
  * auto-detected default values.
@@ -291,6 +320,7 @@ static void dwc2_set_default_params(struct dwc2_hsotg *hsotg)
 	dwc2_set_param_speed(hsotg);
 	dwc2_set_param_phy_utmi_width(hsotg);
 	dwc2_set_param_power_down(hsotg);
+	dwc2_set_param_lpm(hsotg);
 	p->phy_ulpi_ddr = false;
 	p->phy_ulpi_ext_vbus = false;
 
@@ -303,11 +333,6 @@ static void dwc2_set_default_params(struct dwc2_hsotg *hsotg)
 	p->reload_ctl = (hw->snpsid >= DWC2_CORE_REV_2_92a);
 	p->uframe_sched = true;
 	p->external_id_pin_ctl = false;
-	p->lpm = true;
-	p->lpm_clock_gating = true;
-	p->besl = true;
-	p->hird_threshold_en = true;
-	p->hird_threshold = 4;
 	p->ipg_isoc_en = false;
 	p->service_interval = false;
 	p->max_packet_count = hw->max_packet_count;
diff --git a/drivers/usb/dwc2/platform.c b/drivers/usb/dwc2/platform.c
index c0b64d483552..d10a7f8daec3 100644
--- a/drivers/usb/dwc2/platform.c
+++ b/drivers/usb/dwc2/platform.c
@@ -230,9 +230,6 @@ static int dwc2_lowlevel_hw_init(struct dwc2_hsotg *hsotg)
 
 	reset_control_deassert(hsotg->reset_ecc);
 
-	/* Set default UTMI width */
-	hsotg->phyif = GUSBCFG_PHYIF16;
-
 	/*
 	 * Attempt to find a generic PHY, then look for an old style
 	 * USB PHY and then fall back to pdata
@@ -280,14 +277,14 @@ static int dwc2_lowlevel_hw_init(struct dwc2_hsotg *hsotg)
 		 * width is 8-bit and set the phyif appropriately.
 		 */
 		if (phy_get_bus_width(hsotg->phy) == 8)
-			hsotg->phyif = GUSBCFG_PHYIF8;
+			hsotg->params.phy_utmi_width = 8;
 	}
 
 	/* Clock */
-	hsotg->clk = devm_clk_get(hsotg->dev, "otg");
+	hsotg->clk = devm_clk_get_optional(hsotg->dev, "otg");
 	if (IS_ERR(hsotg->clk)) {
-		hsotg->clk = NULL;
-		dev_dbg(hsotg->dev, "cannot get otg clock\n");
+		dev_err(hsotg->dev, "cannot get otg clock\n");
+		return PTR_ERR(hsotg->clk);
 	}
 
 	/* Regulators */
@@ -481,6 +478,15 @@ static int dwc2_driver_probe(struct platform_device *dev)
 		hsotg->gadget_enabled = 1;
 	}
 
+	hsotg->reset_phy_on_wake =
+		of_property_read_bool(dev->dev.of_node,
+				      "snps,reset-phy-on-wake");
+	if (hsotg->reset_phy_on_wake && !hsotg->phy) {
+		dev_warn(hsotg->dev,
+			 "Quirk reset-phy-on-wake only supports generic PHYs\n");
+		hsotg->reset_phy_on_wake = false;
+	}
+
 	if (hsotg->dr_mode != USB_DR_MODE_PERIPHERAL) {
 		retval = dwc2_hcd_init(hsotg);
 		if (retval) {
diff --git a/drivers/usb/dwc3/Kconfig b/drivers/usb/dwc3/Kconfig
index 2b1494460d0c..4a62045cc812 100644
--- a/drivers/usb/dwc3/Kconfig
+++ b/drivers/usb/dwc3/Kconfig
@@ -54,7 +54,8 @@ comment "Platform Glue Driver Support"
 
 config USB_DWC3_OMAP
 	tristate "Texas Instruments OMAP5 and similar Platforms"
-	depends on EXTCON && (ARCH_OMAP2PLUS || COMPILE_TEST)
+	depends on ARCH_OMAP2PLUS || COMPILE_TEST
+	depends on EXTCON || !EXTCON
 	depends on OF
 	default USB_DWC3
 	help
@@ -95,6 +96,16 @@ config USB_DWC3_KEYSTONE
 	  Support of USB2/3 functionality in TI Keystone2 and AM654 platforms.
 	  Say 'Y' or 'M' here if you have one such device
 
+config USB_DWC3_MESON_G12A
+       tristate "Amlogic Meson G12A Platforms"
+       depends on OF && COMMON_CLK
+       depends on ARCH_MESON || COMPILE_TEST
+       default USB_DWC3
+       select USB_ROLE_SWITCH
+       help
+         Support USB2/3 functionality in Amlogic G12A platforms.
+	 Say 'Y' or 'M' if you have one such device.
+
 config USB_DWC3_OF_SIMPLE
        tristate "Generic OF Simple Glue Layer"
        depends on OF && COMMON_CLK
@@ -115,7 +126,8 @@ config USB_DWC3_ST
 
 config USB_DWC3_QCOM
 	tristate "Qualcomm Platform"
-	depends on EXTCON && (ARCH_QCOM || COMPILE_TEST)
+	depends on ARCH_QCOM || COMPILE_TEST
+	depends on EXTCON || !EXTCON
 	depends on OF
 	default USB_DWC3
 	help
diff --git a/drivers/usb/dwc3/Makefile b/drivers/usb/dwc3/Makefile
index 6e3ef6144e5d..ae86da0dc5bd 100644
--- a/drivers/usb/dwc3/Makefile
+++ b/drivers/usb/dwc3/Makefile
@@ -47,6 +47,7 @@ obj-$(CONFIG_USB_DWC3_EXYNOS)		+= dwc3-exynos.o
 obj-$(CONFIG_USB_DWC3_PCI)		+= dwc3-pci.o
 obj-$(CONFIG_USB_DWC3_HAPS)		+= dwc3-haps.o
 obj-$(CONFIG_USB_DWC3_KEYSTONE)		+= dwc3-keystone.o
+obj-$(CONFIG_USB_DWC3_MESON_G12A)	+= dwc3-meson-g12a.o
 obj-$(CONFIG_USB_DWC3_OF_SIMPLE)	+= dwc3-of-simple.o
 obj-$(CONFIG_USB_DWC3_ST)		+= dwc3-st.o
 obj-$(CONFIG_USB_DWC3_QCOM)		+= dwc3-qcom.o
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index a1b126f90261..4aff1d8dbc4f 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -828,6 +828,7 @@ static void dwc3_set_incr_burst_type(struct dwc3 *dwc)
 	ret = device_property_read_u32_array(dev,
 			"snps,incr-burst-type-adjustment", vals, ntype);
 	if (ret) {
+		kfree(vals);
 		dev_err(dev, "Error to get property\n");
 		return;
 	}
@@ -846,6 +847,8 @@ static void dwc3_set_incr_burst_type(struct dwc3 *dwc)
 		incrx_mode = INCRX_BURST_MODE;
 	}
 
+	kfree(vals);
+
 	/* Enable Undefined Length INCR Burst and Enable INCRx Burst */
 	cfg &= ~DWC3_GSBUSCFG0_INCRBRST_MASK;
 	if (incrx_mode)
@@ -893,12 +896,6 @@ static int dwc3_core_init(struct dwc3 *dwc)
 	u32			reg;
 	int			ret;
 
-	if (!dwc3_core_is_valid(dwc)) {
-		dev_err(dwc->dev, "this is not a DesignWare USB3 DRD Core\n");
-		ret = -ENODEV;
-		goto err0;
-	}
-
 	/*
 	 * Write Linux Version Code to our GUID register so it's easy to figure
 	 * out which kernel version a bug was found.
@@ -1218,7 +1215,7 @@ static void dwc3_get_properties(struct dwc3 *dwc)
 	u8			tx_max_burst_prd;
 
 	/* default to highest possible threshold */
-	lpm_nyet_threshold = 0xff;
+	lpm_nyet_threshold = 0xf;
 
 	/* default to -3.5dB de-emphasis */
 	tx_de_emphasis = 1;
@@ -1426,6 +1423,11 @@ static int dwc3_probe(struct platform_device *pdev)
 	dwc->regs	= regs;
 	dwc->regs_size	= resource_size(&dwc_res);
 
+	if (!dwc3_core_is_valid(dwc)) {
+		dev_err(dwc->dev, "this is not a DesignWare USB3 DRD Core\n");
+		return -ENODEV;
+	}
+
 	dwc3_get_properties(dwc);
 
 	dwc->reset = devm_reset_control_get_optional_shared(dev, NULL);
@@ -1600,6 +1602,7 @@ static int dwc3_suspend_common(struct dwc3 *dwc, pm_message_t msg)
 		spin_lock_irqsave(&dwc->lock, flags);
 		dwc3_gadget_suspend(dwc);
 		spin_unlock_irqrestore(&dwc->lock, flags);
+		synchronize_irq(dwc->irq_gadget);
 		dwc3_core_exit(dwc);
 		break;
 	case DWC3_GCTL_PRTCAP_HOST:
@@ -1632,6 +1635,7 @@ static int dwc3_suspend_common(struct dwc3 *dwc, pm_message_t msg)
 			spin_lock_irqsave(&dwc->lock, flags);
 			dwc3_gadget_suspend(dwc);
 			spin_unlock_irqrestore(&dwc->lock, flags);
+			synchronize_irq(dwc->irq_gadget);
 		}
 
 		dwc3_otg_exit(dwc);
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index 1528d395b156..f19cbeb01087 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -406,8 +406,7 @@
 #define DWC3_DCTL_TRGTULST_SS_INACT	(DWC3_DCTL_TRGTULST(6))
 
 /* These apply for core versions 1.94a and later */
-#define DWC3_DCTL_LPM_ERRATA_MASK	DWC3_DCTL_LPM_ERRATA(0xf)
-#define DWC3_DCTL_LPM_ERRATA(n)		((n) << 20)
+#define DWC3_DCTL_NYET_THRES(n)		(((n) & 0xf) << 20)
 
 #define DWC3_DCTL_KEEP_CONNECT		BIT(19)
 #define DWC3_DCTL_L1_HIBER_EN		BIT(18)
diff --git a/drivers/usb/dwc3/debug.h b/drivers/usb/dwc3/debug.h
index 6759a7efd8d5..068259fdfb0c 100644
--- a/drivers/usb/dwc3/debug.h
+++ b/drivers/usb/dwc3/debug.h
@@ -250,6 +250,9 @@ static inline void dwc3_decode_get_status(__u8 t, __u16 i, __u16 l, char *str,
 		size_t size)
 {
 	switch (t & USB_RECIP_MASK) {
+	case USB_RECIP_DEVICE:
+		snprintf(str, size, "Get Device Status(Length = %d)", l);
+		break;
 	case USB_RECIP_INTERFACE:
 		snprintf(str, size, "Get Interface Status(Intf = %d, Length = %d)",
 				i, l);
diff --git a/drivers/usb/dwc3/dwc3-meson-g12a.c b/drivers/usb/dwc3/dwc3-meson-g12a.c
new file mode 100644
index 000000000000..2aec31a2eacb
--- /dev/null
+++ b/drivers/usb/dwc3/dwc3-meson-g12a.c
@@ -0,0 +1,604 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * USB Glue for Amlogic G12A SoCs
+ *
+ * Copyright (c) 2019 BayLibre, SAS
+ * Author: Neil Armstrong <narmstrong@baylibre.com>
+ */
+
+/*
+ * The USB is organized with a glue around the DWC3 Controller IP as :
+ * - Control registers for each USB2 Ports
+ * - Control registers for the USB PHY layer
+ * - SuperSpeed PHY can be enabled only if port is used
+ *
+ * TOFIX:
+ * - Add dynamic OTG switching with ID change interrupt
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/bitfield.h>
+#include <linux/bitops.h>
+#include <linux/reset.h>
+#include <linux/phy/phy.h>
+#include <linux/usb/otg.h>
+#include <linux/usb/role.h>
+#include <linux/regulator/consumer.h>
+
+/* USB2 Ports Control Registers */
+
+#define U2P_REG_SIZE						0x20
+
+#define U2P_R0							0x0
+	#define U2P_R0_HOST_DEVICE				BIT(0)
+	#define U2P_R0_POWER_OK					BIT(1)
+	#define U2P_R0_HAST_MODE				BIT(2)
+	#define U2P_R0_POWER_ON_RESET				BIT(3)
+	#define U2P_R0_ID_PULLUP				BIT(4)
+	#define U2P_R0_DRV_VBUS					BIT(5)
+
+#define U2P_R1							0x4
+	#define U2P_R1_PHY_READY				BIT(0)
+	#define U2P_R1_ID_DIG					BIT(1)
+	#define U2P_R1_OTG_SESSION_VALID			BIT(2)
+	#define U2P_R1_VBUS_VALID				BIT(3)
+
+/* USB Glue Control Registers */
+
+#define USB_R0							0x80
+	#define USB_R0_P30_LANE0_TX2RX_LOOPBACK			BIT(17)
+	#define USB_R0_P30_LANE0_EXT_PCLK_REQ			BIT(18)
+	#define USB_R0_P30_PCS_RX_LOS_MASK_VAL_MASK		GENMASK(28, 19)
+	#define USB_R0_U2D_SS_SCALEDOWN_MODE_MASK		GENMASK(30, 29)
+	#define USB_R0_U2D_ACT					BIT(31)
+
+#define USB_R1							0x84
+	#define USB_R1_U3H_BIGENDIAN_GS				BIT(0)
+	#define USB_R1_U3H_PME_ENABLE				BIT(1)
+	#define USB_R1_U3H_HUB_PORT_OVERCURRENT_MASK		GENMASK(4, 2)
+	#define USB_R1_U3H_HUB_PORT_PERM_ATTACH_MASK		GENMASK(9, 7)
+	#define USB_R1_U3H_HOST_U2_PORT_DISABLE_MASK		GENMASK(13, 12)
+	#define USB_R1_U3H_HOST_U3_PORT_DISABLE			BIT(16)
+	#define USB_R1_U3H_HOST_PORT_POWER_CONTROL_PRESENT	BIT(17)
+	#define USB_R1_U3H_HOST_MSI_ENABLE			BIT(18)
+	#define USB_R1_U3H_FLADJ_30MHZ_REG_MASK			GENMASK(24, 19)
+	#define USB_R1_P30_PCS_TX_SWING_FULL_MASK		GENMASK(31, 25)
+
+#define USB_R2							0x88
+	#define USB_R2_P30_PCS_TX_DEEMPH_3P5DB_MASK		GENMASK(25, 20)
+	#define USB_R2_P30_PCS_TX_DEEMPH_6DB_MASK		GENMASK(31, 26)
+
+#define USB_R3							0x8c
+	#define USB_R3_P30_SSC_ENABLE				BIT(0)
+	#define USB_R3_P30_SSC_RANGE_MASK			GENMASK(3, 1)
+	#define USB_R3_P30_SSC_REF_CLK_SEL_MASK			GENMASK(12, 4)
+	#define USB_R3_P30_REF_SSP_EN				BIT(13)
+
+#define USB_R4							0x90
+	#define USB_R4_P21_PORT_RESET_0				BIT(0)
+	#define USB_R4_P21_SLEEP_M0				BIT(1)
+	#define USB_R4_MEM_PD_MASK				GENMASK(3, 2)
+	#define USB_R4_P21_ONLY					BIT(4)
+
+#define USB_R5							0x94
+	#define USB_R5_ID_DIG_SYNC				BIT(0)
+	#define USB_R5_ID_DIG_REG				BIT(1)
+	#define USB_R5_ID_DIG_CFG_MASK				GENMASK(3, 2)
+	#define USB_R5_ID_DIG_EN_0				BIT(4)
+	#define USB_R5_ID_DIG_EN_1				BIT(5)
+	#define USB_R5_ID_DIG_CURR				BIT(6)
+	#define USB_R5_ID_DIG_IRQ				BIT(7)
+	#define USB_R5_ID_DIG_TH_MASK				GENMASK(15, 8)
+	#define USB_R5_ID_DIG_CNT_MASK				GENMASK(23, 16)
+
+enum {
+	USB2_HOST_PHY = 0,
+	USB2_OTG_PHY,
+	USB3_HOST_PHY,
+	PHY_COUNT,
+};
+
+static const char *phy_names[PHY_COUNT] = {
+	"usb2-phy0", "usb2-phy1", "usb3-phy0",
+};
+
+struct dwc3_meson_g12a {
+	struct device		*dev;
+	struct regmap		*regmap;
+	struct clk		*clk;
+	struct reset_control	*reset;
+	struct phy		*phys[PHY_COUNT];
+	enum usb_dr_mode	otg_mode;
+	enum phy_mode		otg_phy_mode;
+	unsigned int		usb2_ports;
+	unsigned int		usb3_ports;
+	struct regulator	*vbus;
+	struct usb_role_switch_desc switch_desc;
+	struct usb_role_switch	*role_switch;
+};
+
+static void dwc3_meson_g12a_usb2_set_mode(struct dwc3_meson_g12a *priv,
+					  int i, enum phy_mode mode)
+{
+	if (mode == PHY_MODE_USB_HOST)
+		regmap_update_bits(priv->regmap, U2P_R0 + (U2P_REG_SIZE * i),
+				U2P_R0_HOST_DEVICE,
+				U2P_R0_HOST_DEVICE);
+	else
+		regmap_update_bits(priv->regmap, U2P_R0 + (U2P_REG_SIZE * i),
+				U2P_R0_HOST_DEVICE, 0);
+}
+
+static int dwc3_meson_g12a_usb2_init(struct dwc3_meson_g12a *priv)
+{
+	int i;
+
+	if (priv->otg_mode == USB_DR_MODE_PERIPHERAL)
+		priv->otg_phy_mode = PHY_MODE_USB_DEVICE;
+	else
+		priv->otg_phy_mode = PHY_MODE_USB_HOST;
+
+	for (i = 0 ; i < USB3_HOST_PHY ; ++i) {
+		if (!priv->phys[i])
+			continue;
+
+		regmap_update_bits(priv->regmap, U2P_R0 + (U2P_REG_SIZE * i),
+				   U2P_R0_POWER_ON_RESET,
+				   U2P_R0_POWER_ON_RESET);
+
+		if (i == USB2_OTG_PHY) {
+			regmap_update_bits(priv->regmap,
+				U2P_R0 + (U2P_REG_SIZE * i),
+				U2P_R0_ID_PULLUP | U2P_R0_DRV_VBUS,
+				U2P_R0_ID_PULLUP | U2P_R0_DRV_VBUS);
+
+			dwc3_meson_g12a_usb2_set_mode(priv, i,
+						      priv->otg_phy_mode);
+		} else
+			dwc3_meson_g12a_usb2_set_mode(priv, i,
+						      PHY_MODE_USB_HOST);
+
+		regmap_update_bits(priv->regmap, U2P_R0 + (U2P_REG_SIZE * i),
+				   U2P_R0_POWER_ON_RESET, 0);
+	}
+
+	return 0;
+}
+
+static void dwc3_meson_g12a_usb3_init(struct dwc3_meson_g12a *priv)
+{
+	regmap_update_bits(priv->regmap, USB_R3,
+			USB_R3_P30_SSC_RANGE_MASK |
+			USB_R3_P30_REF_SSP_EN,
+			USB_R3_P30_SSC_ENABLE |
+			FIELD_PREP(USB_R3_P30_SSC_RANGE_MASK, 2) |
+			USB_R3_P30_REF_SSP_EN);
+	udelay(2);
+
+	regmap_update_bits(priv->regmap, USB_R2,
+			USB_R2_P30_PCS_TX_DEEMPH_3P5DB_MASK,
+			FIELD_PREP(USB_R2_P30_PCS_TX_DEEMPH_3P5DB_MASK, 0x15));
+
+	regmap_update_bits(priv->regmap, USB_R2,
+			USB_R2_P30_PCS_TX_DEEMPH_6DB_MASK,
+			FIELD_PREP(USB_R2_P30_PCS_TX_DEEMPH_6DB_MASK, 0x20));
+
+	udelay(2);
+
+	regmap_update_bits(priv->regmap, USB_R1,
+			USB_R1_U3H_HOST_PORT_POWER_CONTROL_PRESENT,
+			USB_R1_U3H_HOST_PORT_POWER_CONTROL_PRESENT);
+
+	regmap_update_bits(priv->regmap, USB_R1,
+			USB_R1_P30_PCS_TX_SWING_FULL_MASK,
+			FIELD_PREP(USB_R1_P30_PCS_TX_SWING_FULL_MASK, 127));
+}
+
+static void dwc3_meson_g12a_usb_otg_apply_mode(struct dwc3_meson_g12a *priv)
+{
+	if (priv->otg_phy_mode == PHY_MODE_USB_DEVICE) {
+		regmap_update_bits(priv->regmap, USB_R0,
+				USB_R0_U2D_ACT, USB_R0_U2D_ACT);
+		regmap_update_bits(priv->regmap, USB_R0,
+				USB_R0_U2D_SS_SCALEDOWN_MODE_MASK, 0);
+		regmap_update_bits(priv->regmap, USB_R4,
+				USB_R4_P21_SLEEP_M0, USB_R4_P21_SLEEP_M0);
+	} else {
+		regmap_update_bits(priv->regmap, USB_R0,
+				USB_R0_U2D_ACT, 0);
+		regmap_update_bits(priv->regmap, USB_R4,
+				USB_R4_P21_SLEEP_M0, 0);
+	}
+}
+
+static int dwc3_meson_g12a_usb_init(struct dwc3_meson_g12a *priv)
+{
+	int ret;
+
+	ret = dwc3_meson_g12a_usb2_init(priv);
+	if (ret)
+		return ret;
+
+	regmap_update_bits(priv->regmap, USB_R1,
+			USB_R1_U3H_FLADJ_30MHZ_REG_MASK,
+			FIELD_PREP(USB_R1_U3H_FLADJ_30MHZ_REG_MASK, 0x20));
+
+	regmap_update_bits(priv->regmap, USB_R5,
+			USB_R5_ID_DIG_EN_0,
+			USB_R5_ID_DIG_EN_0);
+	regmap_update_bits(priv->regmap, USB_R5,
+			USB_R5_ID_DIG_EN_1,
+			USB_R5_ID_DIG_EN_1);
+	regmap_update_bits(priv->regmap, USB_R5,
+			USB_R5_ID_DIG_TH_MASK,
+			FIELD_PREP(USB_R5_ID_DIG_TH_MASK, 0xff));
+
+	/* If we have an actual SuperSpeed port, initialize it */
+	if (priv->usb3_ports)
+		dwc3_meson_g12a_usb3_init(priv);
+
+	dwc3_meson_g12a_usb_otg_apply_mode(priv);
+
+	return 0;
+}
+
+static const struct regmap_config phy_meson_g12a_usb3_regmap_conf = {
+	.reg_bits = 8,
+	.val_bits = 32,
+	.reg_stride = 4,
+	.max_register = USB_R5,
+};
+
+static int dwc3_meson_g12a_get_phys(struct dwc3_meson_g12a *priv)
+{
+	int i;
+
+	for (i = 0 ; i < PHY_COUNT ; ++i) {
+		priv->phys[i] = devm_phy_optional_get(priv->dev, phy_names[i]);
+		if (!priv->phys[i])
+			continue;
+
+		if (IS_ERR(priv->phys[i]))
+			return PTR_ERR(priv->phys[i]);
+
+		if (i == USB3_HOST_PHY)
+			priv->usb3_ports++;
+		else
+			priv->usb2_ports++;
+	}
+
+	dev_info(priv->dev, "USB2 ports: %d\n", priv->usb2_ports);
+	dev_info(priv->dev, "USB3 ports: %d\n", priv->usb3_ports);
+
+	return 0;
+}
+
+static enum phy_mode dwc3_meson_g12a_get_id(struct dwc3_meson_g12a *priv)
+{
+	u32 reg;
+
+	regmap_read(priv->regmap, USB_R5, &reg);
+
+	if (reg & (USB_R5_ID_DIG_SYNC | USB_R5_ID_DIG_REG))
+		return PHY_MODE_USB_DEVICE;
+
+	return PHY_MODE_USB_HOST;
+}
+
+static int dwc3_meson_g12a_otg_mode_set(struct dwc3_meson_g12a *priv,
+					enum phy_mode mode)
+{
+	int ret;
+
+	if (!priv->phys[USB2_OTG_PHY])
+		return -EINVAL;
+
+	if (mode == PHY_MODE_USB_HOST)
+		dev_info(priv->dev, "switching to Host Mode\n");
+	else
+		dev_info(priv->dev, "switching to Device Mode\n");
+
+	if (priv->vbus) {
+		if (mode == PHY_MODE_USB_DEVICE)
+			ret = regulator_disable(priv->vbus);
+		else
+			ret = regulator_enable(priv->vbus);
+		if (ret)
+			return ret;
+	}
+
+	priv->otg_phy_mode = mode;
+
+	dwc3_meson_g12a_usb2_set_mode(priv, USB2_OTG_PHY, mode);
+
+	dwc3_meson_g12a_usb_otg_apply_mode(priv);
+
+	return 0;
+}
+
+static int dwc3_meson_g12a_role_set(struct device *dev, enum usb_role role)
+{
+	struct dwc3_meson_g12a *priv = dev_get_drvdata(dev);
+	enum phy_mode mode;
+
+	if (role == USB_ROLE_NONE)
+		return 0;
+
+	mode = (role == USB_ROLE_HOST) ? PHY_MODE_USB_HOST
+				       : PHY_MODE_USB_DEVICE;
+
+	if (mode == priv->otg_phy_mode)
+		return 0;
+
+	return dwc3_meson_g12a_otg_mode_set(priv, mode);
+}
+
+static enum usb_role dwc3_meson_g12a_role_get(struct device *dev)
+{
+	struct dwc3_meson_g12a *priv = dev_get_drvdata(dev);
+
+	return priv->otg_phy_mode == PHY_MODE_USB_HOST ?
+		USB_ROLE_HOST : USB_ROLE_DEVICE;
+}
+
+static struct device *dwc3_meson_g12_find_child(struct device *dev,
+						const char *compatible)
+{
+	struct platform_device *pdev;
+	struct device_node *np;
+
+	np = of_get_compatible_child(dev->of_node, compatible);
+	if (!np)
+		return NULL;
+
+	pdev = of_find_device_by_node(np);
+	of_node_put(np);
+	if (!pdev)
+		return NULL;
+
+	return &pdev->dev;
+}
+
+static int dwc3_meson_g12a_probe(struct platform_device *pdev)
+{
+	struct dwc3_meson_g12a	*priv;
+	struct device		*dev = &pdev->dev;
+	struct device_node	*np = dev->of_node;
+	void __iomem *base;
+	struct resource *res;
+	enum phy_mode otg_id;
+	int ret, i;
+
+	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	base = devm_ioremap_resource(dev, res);
+	if (IS_ERR(base))
+		return PTR_ERR(base);
+
+	priv->regmap = devm_regmap_init_mmio(dev, base,
+					     &phy_meson_g12a_usb3_regmap_conf);
+	if (IS_ERR(priv->regmap))
+		return PTR_ERR(priv->regmap);
+
+	priv->vbus = devm_regulator_get_optional(dev, "vbus");
+	if (IS_ERR(priv->vbus)) {
+		if (PTR_ERR(priv->vbus) == -EPROBE_DEFER)
+			return PTR_ERR(priv->vbus);
+		priv->vbus = NULL;
+	}
+
+	priv->clk = devm_clk_get(dev, NULL);
+	if (IS_ERR(priv->clk))
+		return PTR_ERR(priv->clk);
+
+	ret = clk_prepare_enable(priv->clk);
+	if (ret)
+		return ret;
+
+	devm_add_action_or_reset(dev,
+				 (void(*)(void *))clk_disable_unprepare,
+				 priv->clk);
+
+	platform_set_drvdata(pdev, priv);
+	priv->dev = dev;
+
+	priv->reset = devm_reset_control_get(dev, NULL);
+	if (IS_ERR(priv->reset)) {
+		ret = PTR_ERR(priv->reset);
+		dev_err(dev, "failed to get device reset, err=%d\n", ret);
+		return ret;
+	}
+
+	ret = reset_control_reset(priv->reset);
+	if (ret)
+		return ret;
+
+	ret = dwc3_meson_g12a_get_phys(priv);
+	if (ret)
+		return ret;
+
+	if (priv->vbus) {
+		ret = regulator_enable(priv->vbus);
+		if (ret)
+			return ret;
+	}
+
+	/* Get dr_mode */
+	priv->otg_mode = usb_get_dr_mode(dev);
+
+	dwc3_meson_g12a_usb_init(priv);
+
+	/* Init PHYs */
+	for (i = 0 ; i < PHY_COUNT ; ++i) {
+		ret = phy_init(priv->phys[i]);
+		if (ret)
+			return ret;
+	}
+
+	/* Set PHY Power */
+	for (i = 0 ; i < PHY_COUNT ; ++i) {
+		ret = phy_power_on(priv->phys[i]);
+		if (ret)
+			goto err_phys_exit;
+	}
+
+	ret = of_platform_populate(np, NULL, NULL, dev);
+	if (ret) {
+		clk_disable_unprepare(priv->clk);
+		goto err_phys_power;
+	}
+
+	/* Setup OTG mode corresponding to the ID pin */
+	if (priv->otg_mode == USB_DR_MODE_OTG) {
+		/* TOFIX Handle ID mode toggling via IRQ */
+		otg_id = dwc3_meson_g12a_get_id(priv);
+		if (otg_id != priv->otg_phy_mode) {
+			if (dwc3_meson_g12a_otg_mode_set(priv, otg_id))
+				dev_warn(dev, "Failed to switch OTG mode\n");
+		}
+	}
+
+	/* Setup role switcher */
+	priv->switch_desc.usb2_port = dwc3_meson_g12_find_child(dev,
+								"snps,dwc3");
+	priv->switch_desc.udc = dwc3_meson_g12_find_child(dev, "snps,dwc2");
+	priv->switch_desc.allow_userspace_control = true;
+	priv->switch_desc.set = dwc3_meson_g12a_role_set;
+	priv->switch_desc.get = dwc3_meson_g12a_role_get;
+
+	priv->role_switch = usb_role_switch_register(dev, &priv->switch_desc);
+	if (IS_ERR(priv->role_switch))
+		dev_warn(dev, "Unable to register Role Switch\n");
+
+	pm_runtime_set_active(dev);
+	pm_runtime_enable(dev);
+	pm_runtime_get_sync(dev);
+
+	return 0;
+
+err_phys_power:
+	for (i = 0 ; i < PHY_COUNT ; ++i)
+		phy_power_off(priv->phys[i]);
+
+err_phys_exit:
+	for (i = 0 ; i < PHY_COUNT ; ++i)
+		phy_exit(priv->phys[i]);
+
+	return ret;
+}
+
+static int dwc3_meson_g12a_remove(struct platform_device *pdev)
+{
+	struct dwc3_meson_g12a *priv = platform_get_drvdata(pdev);
+	struct device *dev = &pdev->dev;
+	int i;
+
+	usb_role_switch_unregister(priv->role_switch);
+
+	of_platform_depopulate(dev);
+
+	for (i = 0 ; i < PHY_COUNT ; ++i) {
+		phy_power_off(priv->phys[i]);
+		phy_exit(priv->phys[i]);
+	}
+
+	pm_runtime_disable(dev);
+	pm_runtime_put_noidle(dev);
+	pm_runtime_set_suspended(dev);
+
+	return 0;
+}
+
+static int __maybe_unused dwc3_meson_g12a_runtime_suspend(struct device *dev)
+{
+	struct dwc3_meson_g12a	*priv = dev_get_drvdata(dev);
+
+	clk_disable(priv->clk);
+
+	return 0;
+}
+
+static int __maybe_unused dwc3_meson_g12a_runtime_resume(struct device *dev)
+{
+	struct dwc3_meson_g12a	*priv = dev_get_drvdata(dev);
+
+	return clk_enable(priv->clk);
+}
+
+static int __maybe_unused dwc3_meson_g12a_suspend(struct device *dev)
+{
+	struct dwc3_meson_g12a *priv = dev_get_drvdata(dev);
+	int i;
+
+	for (i = 0 ; i < PHY_COUNT ; ++i) {
+		phy_power_off(priv->phys[i]);
+		phy_exit(priv->phys[i]);
+	}
+
+	reset_control_assert(priv->reset);
+
+	return 0;
+}
+
+static int __maybe_unused dwc3_meson_g12a_resume(struct device *dev)
+{
+	struct dwc3_meson_g12a *priv = dev_get_drvdata(dev);
+	int i, ret;
+
+	reset_control_deassert(priv->reset);
+
+	dwc3_meson_g12a_usb_init(priv);
+
+	/* Init PHYs */
+	for (i = 0 ; i < PHY_COUNT ; ++i) {
+		ret = phy_init(priv->phys[i]);
+		if (ret)
+			return ret;
+	}
+
+	/* Set PHY Power */
+	for (i = 0 ; i < PHY_COUNT ; ++i) {
+		ret = phy_power_on(priv->phys[i]);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+static const struct dev_pm_ops dwc3_meson_g12a_dev_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(dwc3_meson_g12a_suspend, dwc3_meson_g12a_resume)
+	SET_RUNTIME_PM_OPS(dwc3_meson_g12a_runtime_suspend,
+			   dwc3_meson_g12a_runtime_resume, NULL)
+};
+
+static const struct of_device_id dwc3_meson_g12a_match[] = {
+	{ .compatible = "amlogic,meson-g12a-usb-ctrl" },
+	{ /* Sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, dwc3_meson_g12a_match);
+
+static struct platform_driver dwc3_meson_g12a_driver = {
+	.probe		= dwc3_meson_g12a_probe,
+	.remove		= dwc3_meson_g12a_remove,
+	.driver		= {
+		.name	= "dwc3-meson-g12a",
+		.of_match_table = dwc3_meson_g12a_match,
+		.pm	= &dwc3_meson_g12a_dev_pm_ops,
+	},
+};
+
+module_platform_driver(dwc3_meson_g12a_driver);
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("Amlogic Meson G12A USB Glue Layer");
+MODULE_AUTHOR("Neil Armstrong <narmstrong@baylibre.com>");
diff --git a/drivers/usb/dwc3/dwc3-of-simple.c b/drivers/usb/dwc3/dwc3-of-simple.c
index 4c2771c5e727..c4da82dd15c7 100644
--- a/drivers/usb/dwc3/dwc3-of-simple.c
+++ b/drivers/usb/dwc3/dwc3-of-simple.c
@@ -24,59 +24,13 @@
 
 struct dwc3_of_simple {
 	struct device		*dev;
-	struct clk		**clks;
+	struct clk_bulk_data	*clks;
 	int			num_clocks;
 	struct reset_control	*resets;
 	bool			pulse_resets;
 	bool			need_reset;
 };
 
-static int dwc3_of_simple_clk_init(struct dwc3_of_simple *simple, int count)
-{
-	struct device		*dev = simple->dev;
-	struct device_node	*np = dev->of_node;
-	int			i;
-
-	simple->num_clocks = count;
-
-	if (!count)
-		return 0;
-
-	simple->clks = devm_kcalloc(dev, simple->num_clocks,
-			sizeof(struct clk *), GFP_KERNEL);
-	if (!simple->clks)
-		return -ENOMEM;
-
-	for (i = 0; i < simple->num_clocks; i++) {
-		struct clk	*clk;
-		int		ret;
-
-		clk = of_clk_get(np, i);
-		if (IS_ERR(clk)) {
-			while (--i >= 0) {
-				clk_disable_unprepare(simple->clks[i]);
-				clk_put(simple->clks[i]);
-			}
-			return PTR_ERR(clk);
-		}
-
-		ret = clk_prepare_enable(clk);
-		if (ret < 0) {
-			while (--i >= 0) {
-				clk_disable_unprepare(simple->clks[i]);
-				clk_put(simple->clks[i]);
-			}
-			clk_put(clk);
-
-			return ret;
-		}
-
-		simple->clks[i] = clk;
-	}
-
-	return 0;
-}
-
 static int dwc3_of_simple_probe(struct platform_device *pdev)
 {
 	struct dwc3_of_simple	*simple;
@@ -84,7 +38,6 @@ static int dwc3_of_simple_probe(struct platform_device *pdev)
 	struct device_node	*np = dev->of_node;
 
 	int			ret;
-	int			i;
 	bool			shared_resets = false;
 
 	simple = devm_kzalloc(dev, sizeof(*simple), GFP_KERNEL);
@@ -124,20 +77,18 @@ static int dwc3_of_simple_probe(struct platform_device *pdev)
 			goto err_resetc_put;
 	}
 
-	ret = dwc3_of_simple_clk_init(simple, of_count_phandle_with_args(np,
-						"clocks", "#clock-cells"));
+	ret = clk_bulk_get_all(simple->dev, &simple->clks);
+	if (ret < 0)
+		goto err_resetc_assert;
+
+	simple->num_clocks = ret;
+	ret = clk_bulk_prepare_enable(simple->num_clocks, simple->clks);
 	if (ret)
 		goto err_resetc_assert;
 
 	ret = of_platform_populate(np, NULL, NULL, dev);
-	if (ret) {
-		for (i = 0; i < simple->num_clocks; i++) {
-			clk_disable_unprepare(simple->clks[i]);
-			clk_put(simple->clks[i]);
-		}
-
-		goto err_resetc_assert;
-	}
+	if (ret)
+		goto err_clk_put;
 
 	pm_runtime_set_active(dev);
 	pm_runtime_enable(dev);
@@ -145,6 +96,10 @@ static int dwc3_of_simple_probe(struct platform_device *pdev)
 
 	return 0;
 
+err_clk_put:
+	clk_bulk_disable_unprepare(simple->num_clocks, simple->clks);
+	clk_bulk_put_all(simple->num_clocks, simple->clks);
+
 err_resetc_assert:
 	if (!simple->pulse_resets)
 		reset_control_assert(simple->resets);
@@ -158,14 +113,11 @@ static int dwc3_of_simple_remove(struct platform_device *pdev)
 {
 	struct dwc3_of_simple	*simple = platform_get_drvdata(pdev);
 	struct device		*dev = &pdev->dev;
-	int			i;
 
 	of_platform_depopulate(dev);
 
-	for (i = 0; i < simple->num_clocks; i++) {
-		clk_disable_unprepare(simple->clks[i]);
-		clk_put(simple->clks[i]);
-	}
+	clk_bulk_disable_unprepare(simple->num_clocks, simple->clks);
+	clk_bulk_put_all(simple->num_clocks, simple->clks);
 	simple->num_clocks = 0;
 
 	if (!simple->pulse_resets)
@@ -183,10 +135,8 @@ static int dwc3_of_simple_remove(struct platform_device *pdev)
 static int __maybe_unused dwc3_of_simple_runtime_suspend(struct device *dev)
 {
 	struct dwc3_of_simple	*simple = dev_get_drvdata(dev);
-	int			i;
 
-	for (i = 0; i < simple->num_clocks; i++)
-		clk_disable(simple->clks[i]);
+	clk_bulk_disable(simple->num_clocks, simple->clks);
 
 	return 0;
 }
@@ -194,19 +144,8 @@ static int __maybe_unused dwc3_of_simple_runtime_suspend(struct device *dev)
 static int __maybe_unused dwc3_of_simple_runtime_resume(struct device *dev)
 {
 	struct dwc3_of_simple	*simple = dev_get_drvdata(dev);
-	int			ret;
-	int			i;
-
-	for (i = 0; i < simple->num_clocks; i++) {
-		ret = clk_enable(simple->clks[i]);
-		if (ret < 0) {
-			while (--i >= 0)
-				clk_disable(simple->clks[i]);
-			return ret;
-		}
-	}
 
-	return 0;
+	return clk_bulk_enable(simple->num_clocks, simple->clks);
 }
 
 static int __maybe_unused dwc3_of_simple_suspend(struct device *dev)
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index e293400cc6e9..d67655384eb2 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -2863,7 +2863,7 @@ static void dwc3_gadget_conndone_interrupt(struct dwc3 *dwc)
 				"LPM Erratum not available on dwc3 revisions < 2.40a\n");
 
 		if (dwc->has_lpm_erratum && dwc->revision >= DWC3_REVISION_240A)
-			reg |= DWC3_DCTL_LPM_ERRATA(dwc->lpm_nyet_threshold);
+			reg |= DWC3_DCTL_NYET_THRES(dwc->lpm_nyet_threshold);
 
 		dwc3_writel(dwc->regs, DWC3_DCTL, reg);
 	} else {
@@ -3301,6 +3301,7 @@ int dwc3_gadget_init(struct dwc3 *dwc)
 	dwc->gadget.sg_supported	= true;
 	dwc->gadget.name		= "dwc3-gadget";
 	dwc->gadget.is_otg		= dwc->dr_mode == USB_DR_MODE_OTG;
+	dwc->gadget.lpm_capable		= true;
 
 	/*
 	 * FIXME We might be setting max_speed to <SUPER, however versions
@@ -3384,8 +3385,6 @@ int dwc3_gadget_suspend(struct dwc3 *dwc)
 	dwc3_disconnect_gadget(dwc);
 	__dwc3_gadget_stop(dwc);
 
-	synchronize_irq(dwc->irq_gadget);
-
 	return 0;
 }
 
diff --git a/drivers/usb/gadget/function/f_fs.c b/drivers/usb/gadget/function/f_fs.c
index 20413c276c61..47be961f1bf3 100644
--- a/drivers/usb/gadget/function/f_fs.c
+++ b/drivers/usb/gadget/function/f_fs.c
@@ -1133,7 +1133,8 @@ error_lock:
 error_mutex:
 	mutex_unlock(&epfile->mutex);
 error:
-	ffs_free_buffer(io_data);
+	if (ret != -EIOCBQUEUED) /* don't free if there is iocb queued */
+		ffs_free_buffer(io_data);
 	return ret;
 }
 
diff --git a/drivers/usb/gadget/function/f_ncm.c b/drivers/usb/gadget/function/f_ncm.c
index 5780fba620ab..2d6e76e4cffa 100644
--- a/drivers/usb/gadget/function/f_ncm.c
+++ b/drivers/usb/gadget/function/f_ncm.c
@@ -23,6 +23,7 @@
 #include "u_ether.h"
 #include "u_ether_configfs.h"
 #include "u_ncm.h"
+#include "configfs.h"
 
 /*
  * This function is a "CDC Network Control Model" (CDC NCM) Ethernet link.
@@ -35,9 +36,7 @@
 
 /* to trigger crc/non-crc ndp signature */
 
-#define NCM_NDP_HDR_CRC_MASK	0x01000000
 #define NCM_NDP_HDR_CRC		0x01000000
-#define NCM_NDP_HDR_NOCRC	0x00000000
 
 enum ncm_notify_state {
 	NCM_NOTIFY_NONE,		/* don't notify */
@@ -526,6 +525,7 @@ static inline void ncm_reset_values(struct f_ncm *ncm)
 {
 	ncm->parser_opts = &ndp16_opts;
 	ncm->is_crc = false;
+	ncm->ndp_sign = ncm->parser_opts->ndp_sign;
 	ncm->port.cdc_filter = DEFAULT_FILTER;
 
 	/* doesn't make sense for ncm, fixed size used */
@@ -805,25 +805,20 @@ static int ncm_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl)
 	case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
 		| USB_CDC_SET_CRC_MODE:
 	{
-		int ndp_hdr_crc = 0;
-
 		if (w_length != 0 || w_index != ncm->ctrl_id)
 			goto invalid;
 		switch (w_value) {
 		case 0x0000:
 			ncm->is_crc = false;
-			ndp_hdr_crc = NCM_NDP_HDR_NOCRC;
 			DBG(cdev, "non-CRC mode selected\n");
 			break;
 		case 0x0001:
 			ncm->is_crc = true;
-			ndp_hdr_crc = NCM_NDP_HDR_CRC;
 			DBG(cdev, "CRC mode selected\n");
 			break;
 		default:
 			goto invalid;
 		}
-		ncm->ndp_sign = ncm->parser_opts->ndp_sign | ndp_hdr_crc;
 		value = 0;
 		break;
 	}
@@ -840,6 +835,8 @@ invalid:
 			ctrl->bRequestType, ctrl->bRequest,
 			w_value, w_index, w_length);
 	}
+	ncm->ndp_sign = ncm->parser_opts->ndp_sign |
+		(ncm->is_crc ? NCM_NDP_HDR_CRC : 0);
 
 	/* respond with data transfer or status phase? */
 	if (value >= 0) {
@@ -1395,6 +1392,16 @@ static int ncm_bind(struct usb_configuration *c, struct usb_function *f)
 		return -EINVAL;
 
 	ncm_opts = container_of(f->fi, struct f_ncm_opts, func_inst);
+
+	if (cdev->use_os_string) {
+		f->os_desc_table = kzalloc(sizeof(*f->os_desc_table),
+					   GFP_KERNEL);
+		if (!f->os_desc_table)
+			return -ENOMEM;
+		f->os_desc_n = 1;
+		f->os_desc_table[0].os_desc = &ncm_opts->ncm_os_desc;
+	}
+
 	/*
 	 * in drivers/usb/gadget/configfs.c:configfs_composite_bind()
 	 * configurations are bound in sequence with list_for_each_entry,
@@ -1408,13 +1415,15 @@ static int ncm_bind(struct usb_configuration *c, struct usb_function *f)
 		status = gether_register_netdev(ncm_opts->net);
 		mutex_unlock(&ncm_opts->lock);
 		if (status)
-			return status;
+			goto fail;
 		ncm_opts->bound = true;
 	}
 	us = usb_gstrings_attach(cdev, ncm_strings,
 				 ARRAY_SIZE(ncm_string_defs));
-	if (IS_ERR(us))
-		return PTR_ERR(us);
+	if (IS_ERR(us)) {
+		status = PTR_ERR(us);
+		goto fail;
+	}
 	ncm_control_intf.iInterface = us[STRING_CTRL_IDX].id;
 	ncm_data_nop_intf.iInterface = us[STRING_DATA_IDX].id;
 	ncm_data_intf.iInterface = us[STRING_DATA_IDX].id;
@@ -1431,6 +1440,10 @@ static int ncm_bind(struct usb_configuration *c, struct usb_function *f)
 	ncm_control_intf.bInterfaceNumber = status;
 	ncm_union_desc.bMasterInterface0 = status;
 
+	if (cdev->use_os_string)
+		f->os_desc_table[0].if_id =
+			ncm_iad_desc.bFirstInterface;
+
 	status = usb_interface_id(c, f);
 	if (status < 0)
 		goto fail;
@@ -1510,6 +1523,9 @@ static int ncm_bind(struct usb_configuration *c, struct usb_function *f)
 	return 0;
 
 fail:
+	kfree(f->os_desc_table);
+	f->os_desc_n = 0;
+
 	if (ncm->notify_req) {
 		kfree(ncm->notify_req->buf);
 		usb_ep_free_request(ncm->notify, ncm->notify_req);
@@ -1564,16 +1580,22 @@ static void ncm_free_inst(struct usb_function_instance *f)
 		gether_cleanup(netdev_priv(opts->net));
 	else
 		free_netdev(opts->net);
+	kfree(opts->ncm_interf_group);
 	kfree(opts);
 }
 
 static struct usb_function_instance *ncm_alloc_inst(void)
 {
 	struct f_ncm_opts *opts;
+	struct usb_os_desc *descs[1];
+	char *names[1];
+	struct config_group *ncm_interf_group;
 
 	opts = kzalloc(sizeof(*opts), GFP_KERNEL);
 	if (!opts)
 		return ERR_PTR(-ENOMEM);
+	opts->ncm_os_desc.ext_compat_id = opts->ncm_ext_compat_id;
+
 	mutex_init(&opts->lock);
 	opts->func_inst.free_func_inst = ncm_free_inst;
 	opts->net = gether_setup_default();
@@ -1582,8 +1604,20 @@ static struct usb_function_instance *ncm_alloc_inst(void)
 		kfree(opts);
 		return ERR_CAST(net);
 	}
+	INIT_LIST_HEAD(&opts->ncm_os_desc.ext_prop);
+
+	descs[0] = &opts->ncm_os_desc;
+	names[0] = "ncm";
 
 	config_group_init_type_name(&opts->func_inst.group, "", &ncm_func_type);
+	ncm_interf_group =
+		usb_os_desc_prepare_interf_dir(&opts->func_inst.group, 1, descs,
+					       names, THIS_MODULE);
+	if (IS_ERR(ncm_interf_group)) {
+		ncm_free_inst(&opts->func_inst);
+		return ERR_CAST(ncm_interf_group);
+	}
+	opts->ncm_interf_group = ncm_interf_group;
 
 	return &opts->func_inst;
 }
@@ -1609,6 +1643,9 @@ static void ncm_unbind(struct usb_configuration *c, struct usb_function *f)
 
 	hrtimer_cancel(&ncm->task_timer);
 
+	kfree(f->os_desc_table);
+	f->os_desc_n = 0;
+
 	ncm_string_defs[0].id = 0;
 	usb_free_all_descriptors(f);
 
diff --git a/drivers/usb/gadget/function/f_uac1_legacy.c b/drivers/usb/gadget/function/f_uac1_legacy.c
index 24c086bcdeaa..6677ae932de0 100644
--- a/drivers/usb/gadget/function/f_uac1_legacy.c
+++ b/drivers/usb/gadget/function/f_uac1_legacy.c
@@ -54,8 +54,8 @@ static struct uac1_ac_header_descriptor_1 ac_header_desc = {
 	.bLength =		UAC_DT_AC_HEADER_LENGTH,
 	.bDescriptorType =	USB_DT_CS_INTERFACE,
 	.bDescriptorSubtype =	UAC_HEADER,
-	.bcdADC =		__constant_cpu_to_le16(0x0100),
-	.wTotalLength =		__constant_cpu_to_le16(UAC_DT_TOTAL_LENGTH),
+	.bcdADC =		cpu_to_le16(0x0100),
+	.wTotalLength =		cpu_to_le16(UAC_DT_TOTAL_LENGTH),
 	.bInCollection =	F_AUDIO_NUM_INTERFACES,
 	.baInterfaceNr = {
 	/* Interface number of the first AudioStream interface */
@@ -183,7 +183,7 @@ static struct uac_iso_endpoint_descriptor as_iso_out_desc = {
 	.bDescriptorSubtype =	UAC_EP_GENERAL,
 	.bmAttributes = 	1,
 	.bLockDelayUnits =	1,
-	.wLockDelay =		__constant_cpu_to_le16(1),
+	.wLockDelay =		cpu_to_le16(1),
 };
 
 static struct usb_descriptor_header *f_audio_desc[] = {
diff --git a/drivers/usb/gadget/function/u_ncm.h b/drivers/usb/gadget/function/u_ncm.h
index d483e45c0f77..70da3201a1d0 100644
--- a/drivers/usb/gadget/function/u_ncm.h
+++ b/drivers/usb/gadget/function/u_ncm.h
@@ -20,6 +20,9 @@ struct f_ncm_opts {
 	struct net_device		*net;
 	bool				bound;
 
+	struct config_group		*ncm_interf_group;
+	struct usb_os_desc		ncm_os_desc;
+	char				ncm_ext_compat_id[16];
 	/*
 	 * Read/write access to configfs attributes is handled by configfs.
 	 *
diff --git a/drivers/usb/gadget/udc/aspeed-vhub/epn.c b/drivers/usb/gadget/udc/aspeed-vhub/epn.c
index 83340f4fdc6e..35941dc125f9 100644
--- a/drivers/usb/gadget/udc/aspeed-vhub/epn.c
+++ b/drivers/usb/gadget/udc/aspeed-vhub/epn.c
@@ -593,10 +593,6 @@ static int ast_vhub_epn_disable(struct usb_ep* u_ep)
 static int ast_vhub_epn_enable(struct usb_ep* u_ep,
 			       const struct usb_endpoint_descriptor *desc)
 {
-	static const char *ep_type_string[] __maybe_unused = { "ctrl",
-							       "isoc",
-							       "bulk",
-							       "intr" };
 	struct ast_vhub_ep *ep = to_ast_ep(u_ep);
 	struct ast_vhub_dev *dev;
 	struct ast_vhub *vhub;
@@ -646,7 +642,7 @@ static int ast_vhub_epn_enable(struct usb_ep* u_ep,
 	ep->epn.wedged = false;
 
 	EPDBG(ep, "Enabling [%s] %s num %d maxpacket=%d\n",
-	      ep->epn.is_in ? "in" : "out", ep_type_string[type],
+	      ep->epn.is_in ? "in" : "out", usb_ep_type_string(type),
 	      usb_endpoint_num(desc), maxpacket);
 
 	/* Can we use DMA descriptor mode ? */
diff --git a/drivers/usb/gadget/udc/atmel_usba_udc.c b/drivers/usb/gadget/udc/atmel_usba_udc.c
index 660712e0bf98..503d275bc4c4 100644
--- a/drivers/usb/gadget/udc/atmel_usba_udc.c
+++ b/drivers/usb/gadget/udc/atmel_usba_udc.c
@@ -358,8 +358,20 @@ static inline u32 usba_int_enb_get(struct usba_udc *udc)
 	return udc->int_enb_cache;
 }
 
-static inline void usba_int_enb_set(struct usba_udc *udc, u32 val)
+static inline void usba_int_enb_set(struct usba_udc *udc, u32 mask)
 {
+	u32 val;
+
+	val = udc->int_enb_cache | mask;
+	usba_writel(udc, INT_ENB, val);
+	udc->int_enb_cache = val;
+}
+
+static inline void usba_int_enb_clear(struct usba_udc *udc, u32 mask)
+{
+	u32 val;
+
+	val = udc->int_enb_cache & ~mask;
 	usba_writel(udc, INT_ENB, val);
 	udc->int_enb_cache = val;
 }
@@ -629,14 +641,12 @@ usba_ep_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
 	if (ep->can_dma) {
 		u32 ctrl;
 
-		usba_int_enb_set(udc, usba_int_enb_get(udc) |
-				      USBA_BF(EPT_INT, 1 << ep->index) |
+		usba_int_enb_set(udc, USBA_BF(EPT_INT, 1 << ep->index) |
 				      USBA_BF(DMA_INT, 1 << ep->index));
 		ctrl = USBA_AUTO_VALID | USBA_INTDIS_DMA;
 		usba_ep_writel(ep, CTL_ENB, ctrl);
 	} else {
-		usba_int_enb_set(udc, usba_int_enb_get(udc) |
-				      USBA_BF(EPT_INT, 1 << ep->index));
+		usba_int_enb_set(udc, USBA_BF(EPT_INT, 1 << ep->index));
 	}
 
 	spin_unlock_irqrestore(&udc->lock, flags);
@@ -680,8 +690,7 @@ static int usba_ep_disable(struct usb_ep *_ep)
 		usba_dma_readl(ep, STATUS);
 	}
 	usba_ep_writel(ep, CTL_DIS, USBA_EPT_ENABLE);
-	usba_int_enb_set(udc, usba_int_enb_get(udc) &
-			      ~USBA_BF(EPT_INT, 1 << ep->index));
+	usba_int_enb_clear(udc, USBA_BF(EPT_INT, 1 << ep->index));
 
 	request_complete_list(ep, &req_list, -ESHUTDOWN);
 
@@ -1694,6 +1703,9 @@ static void usba_dma_irq(struct usba_udc *udc, struct usba_ep *ep)
 	}
 }
 
+static int start_clock(struct usba_udc *udc);
+static void stop_clock(struct usba_udc *udc);
+
 static irqreturn_t usba_udc_irq(int irq, void *devid)
 {
 	struct usba_udc *udc = devid;
@@ -1708,10 +1720,13 @@ static irqreturn_t usba_udc_irq(int irq, void *devid)
 	DBG(DBG_INT, "irq, status=%#08x\n", status);
 
 	if (status & USBA_DET_SUSPEND) {
+		usba_writel(udc, INT_CLR, USBA_DET_SUSPEND|USBA_WAKE_UP);
+		usba_int_enb_set(udc, USBA_WAKE_UP);
+		usba_int_enb_clear(udc, USBA_DET_SUSPEND);
+		udc->suspended = true;
 		toggle_bias(udc, 0);
-		usba_writel(udc, INT_CLR, USBA_DET_SUSPEND);
-		usba_int_enb_set(udc, int_enb | USBA_WAKE_UP);
 		udc->bias_pulse_needed = true;
+		stop_clock(udc);
 		DBG(DBG_BUS, "Suspend detected\n");
 		if (udc->gadget.speed != USB_SPEED_UNKNOWN
 				&& udc->driver && udc->driver->suspend) {
@@ -1722,14 +1737,17 @@ static irqreturn_t usba_udc_irq(int irq, void *devid)
 	}
 
 	if (status & USBA_WAKE_UP) {
+		start_clock(udc);
 		toggle_bias(udc, 1);
 		usba_writel(udc, INT_CLR, USBA_WAKE_UP);
-		usba_int_enb_set(udc, int_enb & ~USBA_WAKE_UP);
 		DBG(DBG_BUS, "Wake Up CPU detected\n");
 	}
 
 	if (status & USBA_END_OF_RESUME) {
+		udc->suspended = false;
 		usba_writel(udc, INT_CLR, USBA_END_OF_RESUME);
+		usba_int_enb_clear(udc, USBA_WAKE_UP);
+		usba_int_enb_set(udc, USBA_DET_SUSPEND);
 		generate_bias_pulse(udc);
 		DBG(DBG_BUS, "Resume detected\n");
 		if (udc->gadget.speed != USB_SPEED_UNKNOWN
@@ -1744,6 +1762,8 @@ static irqreturn_t usba_udc_irq(int irq, void *devid)
 	if (dma_status) {
 		int i;
 
+		usba_int_enb_set(udc, USBA_DET_SUSPEND);
+
 		for (i = 1; i <= USBA_NR_DMAS; i++)
 			if (dma_status & (1 << i))
 				usba_dma_irq(udc, &udc->usba_ep[i]);
@@ -1753,6 +1773,8 @@ static irqreturn_t usba_udc_irq(int irq, void *devid)
 	if (ep_status) {
 		int i;
 
+		usba_int_enb_set(udc, USBA_DET_SUSPEND);
+
 		for (i = 0; i < udc->num_ep; i++)
 			if (ep_status & (1 << i)) {
 				if (ep_is_control(&udc->usba_ep[i]))
@@ -1766,7 +1788,9 @@ static irqreturn_t usba_udc_irq(int irq, void *devid)
 		struct usba_ep *ep0, *ep;
 		int i, n;
 
-		usba_writel(udc, INT_CLR, USBA_END_OF_RESET);
+		usba_writel(udc, INT_CLR,
+			USBA_END_OF_RESET|USBA_END_OF_RESUME
+			|USBA_DET_SUSPEND|USBA_WAKE_UP);
 		generate_bias_pulse(udc);
 		reset_all_endpoints(udc);
 
@@ -1793,7 +1817,12 @@ static irqreturn_t usba_udc_irq(int irq, void *devid)
 				| USBA_BF(BK_NUMBER, USBA_BK_NUMBER_ONE)));
 		usba_ep_writel(ep0, CTL_ENB,
 				USBA_EPT_ENABLE | USBA_RX_SETUP);
-		usba_int_enb_set(udc, int_enb | USBA_BF(EPT_INT, 1) |
+
+		/* If we get reset while suspended... */
+		udc->suspended = false;
+		usba_int_enb_clear(udc, USBA_WAKE_UP);
+
+		usba_int_enb_set(udc, USBA_BF(EPT_INT, 1) |
 				      USBA_DET_SUSPEND | USBA_END_OF_RESUME);
 
 		/*
@@ -1827,6 +1856,8 @@ static int start_clock(struct usba_udc *udc)
 	if (udc->clocked)
 		return 0;
 
+	pm_stay_awake(&udc->pdev->dev);
+
 	ret = clk_prepare_enable(udc->pclk);
 	if (ret)
 		return ret;
@@ -1849,6 +1880,8 @@ static void stop_clock(struct usba_udc *udc)
 	clk_disable_unprepare(udc->pclk);
 
 	udc->clocked = false;
+
+	pm_relax(&udc->pdev->dev);
 }
 
 static int usba_start(struct usba_udc *udc)
@@ -1860,9 +1893,19 @@ static int usba_start(struct usba_udc *udc)
 	if (ret)
 		return ret;
 
+	if (udc->suspended)
+		return 0;
+
 	spin_lock_irqsave(&udc->lock, flags);
 	toggle_bias(udc, 1);
 	usba_writel(udc, CTRL, USBA_ENABLE_MASK);
+	/* Clear all requested and pending interrupts... */
+	usba_writel(udc, INT_ENB, 0);
+	udc->int_enb_cache = 0;
+	usba_writel(udc, INT_CLR,
+		USBA_END_OF_RESET|USBA_END_OF_RESUME
+		|USBA_DET_SUSPEND|USBA_WAKE_UP);
+	/* ...and enable just 'reset' IRQ to get us started */
 	usba_int_enb_set(udc, USBA_END_OF_RESET);
 	spin_unlock_irqrestore(&udc->lock, flags);
 
@@ -1873,6 +1916,9 @@ static void usba_stop(struct usba_udc *udc)
 {
 	unsigned long flags;
 
+	if (udc->suspended)
+		return;
+
 	spin_lock_irqsave(&udc->lock, flags);
 	udc->gadget.speed = USB_SPEED_UNKNOWN;
 	reset_all_endpoints(udc);
@@ -1900,6 +1946,7 @@ static irqreturn_t usba_vbus_irq_thread(int irq, void *devid)
 		if (vbus) {
 			usba_start(udc);
 		} else {
+			udc->suspended = false;
 			usba_stop(udc);
 
 			if (udc->driver->disconnect)
@@ -1963,6 +2010,7 @@ static int atmel_usba_stop(struct usb_gadget *gadget)
 	if (fifo_mode == 0)
 		udc->configured_ep = 1;
 
+	udc->suspended = false;
 	usba_stop(udc);
 
 	udc->driver = NULL;
@@ -2276,6 +2324,7 @@ static int usba_udc_suspend(struct device *dev)
 	mutex_lock(&udc->vbus_mutex);
 
 	if (!device_may_wakeup(dev)) {
+		udc->suspended = false;
 		usba_stop(udc);
 		goto out;
 	}
@@ -2285,10 +2334,13 @@ static int usba_udc_suspend(struct device *dev)
 	 * to request vbus irq, assuming always on.
 	 */
 	if (udc->vbus_pin) {
+		/* FIXME: right to stop here...??? */
 		usba_stop(udc);
 		enable_irq_wake(gpiod_to_irq(udc->vbus_pin));
 	}
 
+	enable_irq_wake(udc->irq);
+
 out:
 	mutex_unlock(&udc->vbus_mutex);
 	return 0;
@@ -2302,8 +2354,12 @@ static int usba_udc_resume(struct device *dev)
 	if (!udc->driver)
 		return 0;
 
-	if (device_may_wakeup(dev) && udc->vbus_pin)
-		disable_irq_wake(gpiod_to_irq(udc->vbus_pin));
+	if (device_may_wakeup(dev)) {
+		if (udc->vbus_pin)
+			disable_irq_wake(gpiod_to_irq(udc->vbus_pin));
+
+		disable_irq_wake(udc->irq);
+	}
 
 	/* If Vbus is present, enable the controller and wait for reset */
 	mutex_lock(&udc->vbus_mutex);
diff --git a/drivers/usb/gadget/udc/atmel_usba_udc.h b/drivers/usb/gadget/udc/atmel_usba_udc.h
index 030bf797cd25..a0225e4543d4 100644
--- a/drivers/usb/gadget/udc/atmel_usba_udc.h
+++ b/drivers/usb/gadget/udc/atmel_usba_udc.h
@@ -331,6 +331,7 @@ struct usba_udc {
 	struct usba_ep *usba_ep;
 	bool bias_pulse_needed;
 	bool clocked;
+	bool suspended;
 
 	u16 devstatus;
 
diff --git a/drivers/usb/gadget/udc/dummy_hcd.c b/drivers/usb/gadget/udc/dummy_hcd.c
index 213b52508621..8414fac74493 100644
--- a/drivers/usb/gadget/udc/dummy_hcd.c
+++ b/drivers/usb/gadget/udc/dummy_hcd.c
@@ -617,21 +617,7 @@ static int dummy_enable(struct usb_ep *_ep,
 		_ep->name,
 		desc->bEndpointAddress & 0x0f,
 		(desc->bEndpointAddress & USB_DIR_IN) ? "in" : "out",
-		({ char *val;
-		 switch (usb_endpoint_type(desc)) {
-		 case USB_ENDPOINT_XFER_BULK:
-			 val = "bulk";
-			 break;
-		 case USB_ENDPOINT_XFER_ISOC:
-			 val = "iso";
-			 break;
-		 case USB_ENDPOINT_XFER_INT:
-			 val = "intr";
-			 break;
-		 default:
-			 val = "ctrl";
-			 break;
-		 } val; }),
+		usb_ep_type_string(usb_endpoint_type(desc)),
 		max, ep->stream_en ? "enabled" : "disabled");
 
 	/* at this point real hardware should be NAKing transfers
diff --git a/drivers/usb/gadget/udc/lpc32xx_udc.c b/drivers/usb/gadget/udc/lpc32xx_udc.c
index b0781771704e..d8f1c60793ed 100644
--- a/drivers/usb/gadget/udc/lpc32xx_udc.c
+++ b/drivers/usb/gadget/udc/lpc32xx_udc.c
@@ -115,6 +115,11 @@ struct lpc32xx_ep {
 	bool			wedge;
 };
 
+enum atx_type {
+	ISP1301,
+	STOTG04,
+};
+
 /*
  * Common UDC structure
  */
@@ -129,8 +134,6 @@ struct lpc32xx_udc {
 
 	/* Board and device specific */
 	struct lpc32xx_usbd_cfg	*board;
-	u32			io_p_start;
-	u32			io_p_size;
 	void __iomem		*udp_baseaddr;
 	int			udp_irq[4];
 	struct clk		*usb_slv_clk;
@@ -151,10 +154,10 @@ struct lpc32xx_udc {
 	u8			last_vbus;
 	int			pullup;
 	int			poweron;
+	enum atx_type		atx;
 
 	/* Work queues related to I2C support */
 	struct work_struct	pullup_job;
-	struct work_struct	vbus_job;
 	struct work_struct	power_job;
 
 	/* USB device peripheral - various */
@@ -553,6 +556,15 @@ static inline void remove_debug_file(struct lpc32xx_udc *udc) {}
 /* Primary initialization sequence for the ISP1301 transceiver */
 static void isp1301_udc_configure(struct lpc32xx_udc *udc)
 {
+	u8 value;
+	s32 vendor, product;
+
+	vendor = i2c_smbus_read_word_data(udc->isp1301_i2c_client, 0x00);
+	product = i2c_smbus_read_word_data(udc->isp1301_i2c_client, 0x02);
+
+	if (vendor == 0x0483 && product == 0xa0c4)
+		udc->atx = STOTG04;
+
 	/* LPC32XX only supports DAT_SE0 USB mode */
 	/* This sequence is important */
 
@@ -572,8 +584,12 @@ static void isp1301_udc_configure(struct lpc32xx_udc *udc)
 	 */
 	i2c_smbus_write_byte_data(udc->isp1301_i2c_client,
 		(ISP1301_I2C_MODE_CONTROL_2 | ISP1301_I2C_REG_CLEAR_ADDR), ~0);
+
+	value = MC2_BI_DI;
+	if (udc->atx != STOTG04)
+		value |= MC2_SPD_SUSP_CTRL;
 	i2c_smbus_write_byte_data(udc->isp1301_i2c_client,
-		ISP1301_I2C_MODE_CONTROL_2, (MC2_BI_DI | MC2_SPD_SUSP_CTRL));
+		ISP1301_I2C_MODE_CONTROL_2, value);
 
 	/* Driver VBUS_DRV high or low depending on board setup */
 	if (udc->board->vbus_drv_pol != 0)
@@ -601,24 +617,19 @@ static void isp1301_udc_configure(struct lpc32xx_udc *udc)
 		(ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR),
 		OTG1_VBUS_DISCHRG);
 
-	/* Clear and enable VBUS high edge interrupt */
 	i2c_smbus_write_byte_data(udc->isp1301_i2c_client,
 		ISP1301_I2C_INTERRUPT_LATCH | ISP1301_I2C_REG_CLEAR_ADDR, ~0);
+
 	i2c_smbus_write_byte_data(udc->isp1301_i2c_client,
 		ISP1301_I2C_INTERRUPT_FALLING | ISP1301_I2C_REG_CLEAR_ADDR, ~0);
 	i2c_smbus_write_byte_data(udc->isp1301_i2c_client,
-		ISP1301_I2C_INTERRUPT_FALLING, INT_VBUS_VLD);
-	i2c_smbus_write_byte_data(udc->isp1301_i2c_client,
 		ISP1301_I2C_INTERRUPT_RISING | ISP1301_I2C_REG_CLEAR_ADDR, ~0);
-	i2c_smbus_write_byte_data(udc->isp1301_i2c_client,
-		ISP1301_I2C_INTERRUPT_RISING, INT_VBUS_VLD);
 
-	dev_info(udc->dev, "ISP1301 Vendor ID  : 0x%04x\n",
-		 i2c_smbus_read_word_data(udc->isp1301_i2c_client, 0x00));
-	dev_info(udc->dev, "ISP1301 Product ID : 0x%04x\n",
-		 i2c_smbus_read_word_data(udc->isp1301_i2c_client, 0x02));
+	dev_info(udc->dev, "ISP1301 Vendor ID  : 0x%04x\n", vendor);
+	dev_info(udc->dev, "ISP1301 Product ID : 0x%04x\n", product);
 	dev_info(udc->dev, "ISP1301 Version ID : 0x%04x\n",
 		 i2c_smbus_read_word_data(udc->isp1301_i2c_client, 0x14));
+
 }
 
 /* Enables or disables the USB device pullup via the ISP1301 transceiver */
@@ -661,6 +672,10 @@ static void isp1301_pullup_enable(struct lpc32xx_udc *udc, int en_pullup,
 /* Powers up or down the ISP1301 transceiver */
 static void isp1301_set_powerstate(struct lpc32xx_udc *udc, int enable)
 {
+	/* There is no "global power down" register for stotg04 */
+	if (udc->atx == STOTG04)
+		return;
+
 	if (enable != 0)
 		/* Power up ISP1301 - this ISP1301 will automatically wakeup
 		   when VBUS is detected */
@@ -2830,11 +2845,9 @@ static irqreturn_t lpc32xx_usb_devdma_irq(int irq, void *_udc)
  * VBUS detection, pullup handler, and Gadget cable state notification
  *
  */
-static void vbus_work(struct work_struct *work)
+static void vbus_work(struct lpc32xx_udc *udc)
 {
 	u8 value;
-	struct lpc32xx_udc *udc = container_of(work, struct lpc32xx_udc,
-					       vbus_job);
 
 	if (udc->enabled != 0) {
 		/* Discharge VBUS real quick */
@@ -2870,18 +2883,13 @@ static void vbus_work(struct work_struct *work)
 			lpc32xx_vbus_session(&udc->gadget, udc->vbus);
 		}
 	}
-
-	/* Re-enable after completion */
-	enable_irq(udc->udp_irq[IRQ_USB_ATX]);
 }
 
 static irqreturn_t lpc32xx_usb_vbus_irq(int irq, void *_udc)
 {
 	struct lpc32xx_udc *udc = _udc;
 
-	/* Defer handling of VBUS IRQ to work queue */
-	disable_irq_nosync(udc->udp_irq[IRQ_USB_ATX]);
-	schedule_work(&udc->vbus_job);
+	vbus_work(udc);
 
 	return IRQ_HANDLED;
 }
@@ -2890,7 +2898,6 @@ static int lpc32xx_start(struct usb_gadget *gadget,
 			 struct usb_gadget_driver *driver)
 {
 	struct lpc32xx_udc *udc = to_udc(gadget);
-	int i;
 
 	if (!driver || driver->max_speed < USB_SPEED_FULL || !driver->setup) {
 		dev_err(udc->dev, "bad parameter.\n");
@@ -2910,22 +2917,25 @@ static int lpc32xx_start(struct usb_gadget *gadget,
 
 	/* Force VBUS process once to check for cable insertion */
 	udc->last_vbus = udc->vbus = 0;
-	schedule_work(&udc->vbus_job);
+	vbus_work(udc);
 
-	/* Do not re-enable ATX IRQ (3) */
-	for (i = IRQ_USB_LP; i < IRQ_USB_ATX; i++)
-		enable_irq(udc->udp_irq[i]);
+	/* enable interrupts */
+	i2c_smbus_write_byte_data(udc->isp1301_i2c_client,
+		ISP1301_I2C_INTERRUPT_FALLING, INT_SESS_VLD | INT_VBUS_VLD);
+	i2c_smbus_write_byte_data(udc->isp1301_i2c_client,
+		ISP1301_I2C_INTERRUPT_RISING, INT_SESS_VLD | INT_VBUS_VLD);
 
 	return 0;
 }
 
 static int lpc32xx_stop(struct usb_gadget *gadget)
 {
-	int i;
 	struct lpc32xx_udc *udc = to_udc(gadget);
 
-	for (i = IRQ_USB_LP; i <= IRQ_USB_ATX; i++)
-		disable_irq(udc->udp_irq[i]);
+	i2c_smbus_write_byte_data(udc->isp1301_i2c_client,
+		ISP1301_I2C_INTERRUPT_FALLING | ISP1301_I2C_REG_CLEAR_ADDR, ~0);
+	i2c_smbus_write_byte_data(udc->isp1301_i2c_client,
+		ISP1301_I2C_INTERRUPT_RISING | ISP1301_I2C_REG_CLEAR_ADDR, ~0);
 
 	if (udc->clocked) {
 		spin_lock(&udc->lock);
@@ -2999,7 +3009,7 @@ static int lpc32xx_udc_probe(struct platform_device *pdev)
 	dma_addr_t dma_handle;
 	struct device_node *isp1301_node;
 
-	udc = kmemdup(&controller_template, sizeof(*udc), GFP_KERNEL);
+	udc = devm_kmemdup(dev, &controller_template, sizeof(*udc), GFP_KERNEL);
 	if (!udc)
 		return -ENOMEM;
 
@@ -3022,8 +3032,7 @@ static int lpc32xx_udc_probe(struct platform_device *pdev)
 
 	udc->isp1301_i2c_client = isp1301_get_client(isp1301_node);
 	if (!udc->isp1301_i2c_client) {
-		retval = -EPROBE_DEFER;
-		goto phy_fail;
+		return -EPROBE_DEFER;
 	}
 
 	dev_info(udc->dev, "ISP1301 I2C device at address 0x%x\n",
@@ -3032,7 +3041,7 @@ static int lpc32xx_udc_probe(struct platform_device *pdev)
 	pdev->dev.dma_mask = &lpc32xx_usbd_dmamask;
 	retval = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
 	if (retval)
-		goto resource_fail;
+		return retval;
 
 	udc->board = &lpc32xx_usbddata;
 
@@ -3045,10 +3054,8 @@ static int lpc32xx_udc_probe(struct platform_device *pdev)
 	 *  IORESOURCE_IRQ, USB transceiver interrupt number
 	 */
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		retval = -ENXIO;
-		goto resource_fail;
-	}
+	if (!res)
+		return -ENXIO;
 
 	spin_lock_init(&udc->lock);
 
@@ -3058,45 +3065,33 @@ static int lpc32xx_udc_probe(struct platform_device *pdev)
 		if (udc->udp_irq[i] < 0) {
 			dev_err(udc->dev,
 				"irq resource %d not available!\n", i);
-			retval = udc->udp_irq[i];
-			goto irq_fail;
+			return udc->udp_irq[i];
 		}
 	}
 
-	udc->io_p_start = res->start;
-	udc->io_p_size = resource_size(res);
-	if (!request_mem_region(udc->io_p_start, udc->io_p_size, driver_name)) {
-		dev_err(udc->dev, "someone's using UDC memory\n");
-		retval = -EBUSY;
-		goto request_mem_region_fail;
-	}
-
-	udc->udp_baseaddr = ioremap(udc->io_p_start, udc->io_p_size);
+	udc->udp_baseaddr = devm_ioremap_resource(dev, res);
 	if (!udc->udp_baseaddr) {
-		retval = -ENOMEM;
 		dev_err(udc->dev, "IO map failure\n");
-		goto io_map_fail;
+		return -ENOMEM;
 	}
 
 	/* Get USB device clock */
-	udc->usb_slv_clk = clk_get(&pdev->dev, NULL);
+	udc->usb_slv_clk = devm_clk_get(&pdev->dev, NULL);
 	if (IS_ERR(udc->usb_slv_clk)) {
 		dev_err(udc->dev, "failed to acquire USB device clock\n");
-		retval = PTR_ERR(udc->usb_slv_clk);
-		goto usb_clk_get_fail;
+		return PTR_ERR(udc->usb_slv_clk);
 	}
 
 	/* Enable USB device clock */
 	retval = clk_prepare_enable(udc->usb_slv_clk);
 	if (retval < 0) {
 		dev_err(udc->dev, "failed to start USB device clock\n");
-		goto usb_clk_enable_fail;
+		return retval;
 	}
 
 	/* Setup deferred workqueue data */
 	udc->poweron = udc->pullup = 0;
 	INIT_WORK(&udc->pullup_job, pullup_work);
-	INIT_WORK(&udc->vbus_job, vbus_work);
 #ifdef CONFIG_PM
 	INIT_WORK(&udc->power_job, power_work);
 #endif
@@ -3134,47 +3129,44 @@ static int lpc32xx_udc_probe(struct platform_device *pdev)
 
 	/* Request IRQs - low and high priority USB device IRQs are routed to
 	 * the same handler, while the DMA interrupt is routed elsewhere */
-	retval = request_irq(udc->udp_irq[IRQ_USB_LP], lpc32xx_usb_lp_irq,
-			     0, "udc_lp", udc);
+	retval = devm_request_irq(dev, udc->udp_irq[IRQ_USB_LP],
+				  lpc32xx_usb_lp_irq, 0, "udc_lp", udc);
 	if (retval < 0) {
 		dev_err(udc->dev, "LP request irq %d failed\n",
 			udc->udp_irq[IRQ_USB_LP]);
-		goto irq_lp_fail;
+		goto irq_req_fail;
 	}
-	retval = request_irq(udc->udp_irq[IRQ_USB_HP], lpc32xx_usb_hp_irq,
-			     0, "udc_hp", udc);
+	retval = devm_request_irq(dev, udc->udp_irq[IRQ_USB_HP],
+				  lpc32xx_usb_hp_irq, 0, "udc_hp", udc);
 	if (retval < 0) {
 		dev_err(udc->dev, "HP request irq %d failed\n",
 			udc->udp_irq[IRQ_USB_HP]);
-		goto irq_hp_fail;
+		goto irq_req_fail;
 	}
 
-	retval = request_irq(udc->udp_irq[IRQ_USB_DEVDMA],
-			     lpc32xx_usb_devdma_irq, 0, "udc_dma", udc);
+	retval = devm_request_irq(dev, udc->udp_irq[IRQ_USB_DEVDMA],
+				  lpc32xx_usb_devdma_irq, 0, "udc_dma", udc);
 	if (retval < 0) {
 		dev_err(udc->dev, "DEV request irq %d failed\n",
 			udc->udp_irq[IRQ_USB_DEVDMA]);
-		goto irq_dev_fail;
+		goto irq_req_fail;
 	}
 
 	/* The transceiver interrupt is used for VBUS detection and will
 	   kick off the VBUS handler function */
-	retval = request_irq(udc->udp_irq[IRQ_USB_ATX], lpc32xx_usb_vbus_irq,
-			     0, "udc_otg", udc);
+	retval = devm_request_threaded_irq(dev, udc->udp_irq[IRQ_USB_ATX], NULL,
+					   lpc32xx_usb_vbus_irq, IRQF_ONESHOT,
+					   "udc_otg", udc);
 	if (retval < 0) {
 		dev_err(udc->dev, "VBUS request irq %d failed\n",
 			udc->udp_irq[IRQ_USB_ATX]);
-		goto irq_xcvr_fail;
+		goto irq_req_fail;
 	}
 
 	/* Initialize wait queue */
 	init_waitqueue_head(&udc->ep_disable_wait_queue);
 	atomic_set(&udc->enabled_ep_cnt, 0);
 
-	/* Keep all IRQs disabled until GadgetFS starts up */
-	for (i = IRQ_USB_LP; i <= IRQ_USB_ATX; i++)
-		disable_irq(udc->udp_irq[i]);
-
 	retval = usb_add_gadget_udc(dev, &udc->gadget);
 	if (retval < 0)
 		goto add_gadget_fail;
@@ -3190,32 +3182,15 @@ static int lpc32xx_udc_probe(struct platform_device *pdev)
 	return 0;
 
 add_gadget_fail:
-	free_irq(udc->udp_irq[IRQ_USB_ATX], udc);
-irq_xcvr_fail:
-	free_irq(udc->udp_irq[IRQ_USB_DEVDMA], udc);
-irq_dev_fail:
-	free_irq(udc->udp_irq[IRQ_USB_HP], udc);
-irq_hp_fail:
-	free_irq(udc->udp_irq[IRQ_USB_LP], udc);
-irq_lp_fail:
+irq_req_fail:
 	dma_pool_destroy(udc->dd_cache);
 dma_alloc_fail:
 	dma_free_coherent(&pdev->dev, UDCA_BUFF_SIZE,
 			  udc->udca_v_base, udc->udca_p_base);
 i2c_fail:
 	clk_disable_unprepare(udc->usb_slv_clk);
-usb_clk_enable_fail:
-	clk_put(udc->usb_slv_clk);
-usb_clk_get_fail:
-	iounmap(udc->udp_baseaddr);
-io_map_fail:
-	release_mem_region(udc->io_p_start, udc->io_p_size);
 	dev_err(udc->dev, "%s probe failed, %d\n", driver_name, retval);
-request_mem_region_fail:
-irq_fail:
-resource_fail:
-phy_fail:
-	kfree(udc);
+
 	return retval;
 }
 
@@ -3231,24 +3206,14 @@ static int lpc32xx_udc_remove(struct platform_device *pdev)
 	udc_disable(udc);
 	pullup(udc, 0);
 
-	free_irq(udc->udp_irq[IRQ_USB_ATX], udc);
-
 	device_init_wakeup(&pdev->dev, 0);
 	remove_debug_file(udc);
 
 	dma_pool_destroy(udc->dd_cache);
 	dma_free_coherent(&pdev->dev, UDCA_BUFF_SIZE,
 			  udc->udca_v_base, udc->udca_p_base);
-	free_irq(udc->udp_irq[IRQ_USB_DEVDMA], udc);
-	free_irq(udc->udp_irq[IRQ_USB_HP], udc);
-	free_irq(udc->udp_irq[IRQ_USB_LP], udc);
 
 	clk_disable_unprepare(udc->usb_slv_clk);
-	clk_put(udc->usb_slv_clk);
-
-	iounmap(udc->udp_baseaddr);
-	release_mem_region(udc->io_p_start, udc->io_p_size);
-	kfree(udc);
 
 	return 0;
 }
diff --git a/drivers/usb/gadget/udc/net2272.c b/drivers/usb/gadget/udc/net2272.c
index c2011cd7df8c..564aeee1a1fe 100644
--- a/drivers/usb/gadget/udc/net2272.c
+++ b/drivers/usb/gadget/udc/net2272.c
@@ -573,8 +573,7 @@ net2272_read_fifo(struct net2272_ep *ep, struct net2272_request *req)
 
 		/* completion */
 		if (unlikely(cleanup || is_short ||
-				((req->req.actual == req->req.length)
-				 && !req->req.zero))) {
+				req->req.actual == req->req.length)) {
 
 			if (cleanup) {
 				net2272_out_flush(ep);
diff --git a/drivers/usb/gadget/udc/net2280.c b/drivers/usb/gadget/udc/net2280.c
index 898339e5df10..b6bbe2e448ba 100644
--- a/drivers/usb/gadget/udc/net2280.c
+++ b/drivers/usb/gadget/udc/net2280.c
@@ -789,8 +789,7 @@ static int read_fifo(struct net2280_ep *ep, struct net2280_request *req)
 		(void) readl(&ep->regs->ep_rsp);
 	}
 
-	return is_short || ((req->req.actual == req->req.length) &&
-			!req->req.zero);
+	return is_short || req->req.actual == req->req.length;
 }
 
 /* fill out dma descriptor to match a given request */
@@ -1058,7 +1057,7 @@ net2280_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
 			/* PIO ... stuff the fifo, or unblock it.  */
 			if (ep->is_in)
 				write_fifo(ep, _req);
-			else if (list_empty(&ep->queue)) {
+			else {
 				u32	s;
 
 				/* OUT FIFO might have packet(s) buffered */
diff --git a/drivers/usb/host/fhci-sched.c b/drivers/usb/host/fhci-sched.c
index 3d12cdd5f999..3235d5307403 100644
--- a/drivers/usb/host/fhci-sched.c
+++ b/drivers/usb/host/fhci-sched.c
@@ -727,8 +727,7 @@ void fhci_queue_urb(struct fhci_hcd *fhci, struct urb *urb)
 		}
 		ed->speed = (urb->dev->speed == USB_SPEED_LOW) ?
 			FHCI_LOW_SPEED : FHCI_FULL_SPEED;
-		ed->max_pkt_size = usb_maxpacket(urb->dev,
-			urb->pipe, usb_pipeout(urb->pipe));
+		ed->max_pkt_size = usb_endpoint_maxp(&urb->ep->desc);
 		urb->ep->hcpriv = ed;
 		fhci_dbg(fhci, "new ep speed=%d max_pkt_size=%d\n",
 			 ed->speed, ed->max_pkt_size);
@@ -768,8 +767,7 @@ void fhci_queue_urb(struct fhci_hcd *fhci, struct urb *urb)
 		if (urb->transfer_flags & URB_ZERO_PACKET &&
 				urb->transfer_buffer_length > 0 &&
 				((urb->transfer_buffer_length %
-				usb_maxpacket(urb->dev, urb->pipe,
-				usb_pipeout(urb->pipe))) == 0))
+				usb_endpoint_maxp(&urb->ep->desc)) == 0))
 			urb_state = US_BULK0;
 		while (data_len > 4096) {
 			td = fhci_td_fill(fhci, urb, urb_priv, ed, cnt,
@@ -807,8 +805,8 @@ void fhci_queue_urb(struct fhci_hcd *fhci, struct urb *urb)
 		break;
 	case FHCI_TF_CTRL:
 		ed->dev_addr = usb_pipedevice(urb->pipe);
-		ed->max_pkt_size = usb_maxpacket(urb->dev, urb->pipe,
-			usb_pipeout(urb->pipe));
+		ed->max_pkt_size = usb_endpoint_maxp(&urb->ep->desc);
+
 		/* setup stage */
 		td = fhci_td_fill(fhci, urb, urb_priv, ed, cnt++, FHCI_TA_SETUP,
 			USB_TD_TOGGLE_DATA0, urb->setup_packet, 8, 0, 0, true);
diff --git a/drivers/usb/host/u132-hcd.c b/drivers/usb/host/u132-hcd.c
index 6343fbacd244..4a5c9b599c57 100644
--- a/drivers/usb/host/u132-hcd.c
+++ b/drivers/usb/host/u132-hcd.c
@@ -3203,6 +3203,8 @@ static int __init u132_hcd_init(void)
 		return -ENODEV;
 	printk(KERN_INFO "driver %s\n", hcd_name);
 	workqueue = create_singlethread_workqueue("u132");
+	if (!workqueue)
+		return -ENOMEM;
 	retval = platform_driver_register(&u132_platform_driver);
 	if (retval)
 		destroy_workqueue(workqueue);
diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c
index 96a740543183..3abe70ff1b1e 100644
--- a/drivers/usb/host/xhci-hub.c
+++ b/drivers/usb/host/xhci-hub.c
@@ -487,8 +487,8 @@ static void xhci_disable_port(struct usb_hcd *hcd, struct xhci_hcd *xhci,
 	/* Write 1 to disable the port */
 	writel(port_status | PORT_PE, addr);
 	port_status = readl(addr);
-	xhci_dbg(xhci, "disable port, actual port %d status  = 0x%x\n",
-			wIndex, port_status);
+	xhci_dbg(xhci, "disable port %d-%d, portsc: 0x%x\n",
+		 hcd->self.busnum, wIndex + 1, port_status);
 }
 
 static void xhci_clear_port_change_bit(struct xhci_hcd *xhci, u16 wValue,
@@ -537,8 +537,9 @@ static void xhci_clear_port_change_bit(struct xhci_hcd *xhci, u16 wValue,
 	/* Change bits are all write 1 to clear */
 	writel(port_status | status, addr);
 	port_status = readl(addr);
-	xhci_dbg(xhci, "clear port %s change, actual port %d status  = 0x%x\n",
-			port_change_bit, wIndex, port_status);
+
+	xhci_dbg(xhci, "clear port%d %s change, portsc: 0x%x\n",
+		 wIndex + 1, port_change_bit, port_status);
 }
 
 struct xhci_hub *xhci_get_rhub(struct usb_hcd *hcd)
@@ -565,13 +566,16 @@ static void xhci_set_port_power(struct xhci_hcd *xhci, struct usb_hcd *hcd,
 	rhub = xhci_get_rhub(hcd);
 	port = rhub->ports[index];
 	temp = readl(port->addr);
+
+	xhci_dbg(xhci, "set port power %d-%d %s, portsc: 0x%x\n",
+		 hcd->self.busnum, index + 1, on ? "ON" : "OFF", temp);
+
 	temp = xhci_port_state_to_neutral(temp);
+
 	if (on) {
 		/* Power on */
 		writel(temp | PORT_POWER, port->addr);
-		temp = readl(port->addr);
-		xhci_dbg(xhci, "set port power, actual port %d status  = 0x%x\n",
-						index, temp);
+		readl(port->addr);
 	} else {
 		/* Power off */
 		writel(temp & ~PORT_POWER, port->addr);
@@ -666,12 +670,17 @@ void xhci_set_link_state(struct xhci_hcd *xhci, struct xhci_port *port,
 			 u32 link_state)
 {
 	u32 temp;
+	u32 portsc;
 
-	temp = readl(port->addr);
-	temp = xhci_port_state_to_neutral(temp);
+	portsc = readl(port->addr);
+	temp = xhci_port_state_to_neutral(portsc);
 	temp &= ~PORT_PLS_MASK;
 	temp |= PORT_LINK_STROBE | link_state;
 	writel(temp, port->addr);
+
+	xhci_dbg(xhci, "Set port %d-%d link state, portsc: 0x%x, write 0x%x",
+		 port->rhub->hcd->self.busnum, port->hcd_portnum + 1,
+		 portsc, temp);
 }
 
 static void xhci_set_remote_wake_mask(struct xhci_hcd *xhci,
@@ -840,7 +849,9 @@ static int xhci_handle_usb2_port_link_resume(struct xhci_port *port,
 	} else if (time_after_eq(jiffies, bus_state->resume_done[wIndex])) {
 		int time_left;
 
-		xhci_dbg(xhci, "Resume USB2 port %d\n", wIndex + 1);
+		xhci_dbg(xhci, "resume USB2 port %d-%d\n",
+			 hcd->self.busnum, wIndex + 1);
+
 		bus_state->resume_done[wIndex] = 0;
 		clear_bit(wIndex, &bus_state->resuming_ports);
 
@@ -867,9 +878,8 @@ static int xhci_handle_usb2_port_link_resume(struct xhci_port *port,
 		} else {
 			int port_status = readl(port->addr);
 
-			xhci_warn(xhci, "Port resume %i msec timed out, portsc = 0x%x\n",
-				  XHCI_MAX_REXIT_TIMEOUT_MS,
-				  port_status);
+			xhci_warn(xhci, "Port resume timed out, port %d-%d: 0x%x\n",
+				  hcd->self.busnum, wIndex + 1, port_status);
 			*status |= USB_PORT_STAT_SUSPEND;
 			clear_bit(wIndex, &bus_state->rexit_ports);
 		}
@@ -1124,9 +1134,8 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
 		if (status == 0xffffffff)
 			goto error;
 
-		xhci_dbg(xhci, "get port status, actual port %d status  = 0x%x\n",
-				wIndex, temp);
-		xhci_dbg(xhci, "Get port status returned 0x%x\n", status);
+		xhci_dbg(xhci, "Get port status %d-%d read: 0x%x, return 0x%x",
+			 hcd->self.busnum, wIndex + 1, temp, status);
 
 		put_unaligned(cpu_to_le32(status), (__le32 *) buf);
 		/* if USB 3.1 extended port status return additional 4 bytes */
@@ -1182,7 +1191,8 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
 			temp = readl(ports[wIndex]->addr);
 			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 port %d-%d not in U0/U1/U2\n",
+					  hcd->self.busnum, wIndex + 1);
 				goto error;
 			}
 
diff --git a/drivers/usb/host/xhci-mtk.c b/drivers/usb/host/xhci-mtk.c
index 60987c787e44..026fe18972d3 100644
--- a/drivers/usb/host/xhci-mtk.c
+++ b/drivers/usb/host/xhci-mtk.c
@@ -206,19 +206,6 @@ static int xhci_mtk_ssusb_config(struct xhci_hcd_mtk *mtk)
 	return xhci_mtk_host_enable(mtk);
 }
 
-/* ignore the error if the clock does not exist */
-static struct clk *optional_clk_get(struct device *dev, const char *id)
-{
-	struct clk *opt_clk;
-
-	opt_clk = devm_clk_get(dev, id);
-	/* ignore error number except EPROBE_DEFER */
-	if (IS_ERR(opt_clk) && (PTR_ERR(opt_clk) != -EPROBE_DEFER))
-		opt_clk = NULL;
-
-	return opt_clk;
-}
-
 static int xhci_mtk_clks_get(struct xhci_hcd_mtk *mtk)
 {
 	struct device *dev = mtk->dev;
@@ -229,15 +216,15 @@ static int xhci_mtk_clks_get(struct xhci_hcd_mtk *mtk)
 		return PTR_ERR(mtk->sys_clk);
 	}
 
-	mtk->ref_clk = optional_clk_get(dev, "ref_ck");
+	mtk->ref_clk = devm_clk_get_optional(dev, "ref_ck");
 	if (IS_ERR(mtk->ref_clk))
 		return PTR_ERR(mtk->ref_clk);
 
-	mtk->mcu_clk = optional_clk_get(dev, "mcu_ck");
+	mtk->mcu_clk = devm_clk_get_optional(dev, "mcu_ck");
 	if (IS_ERR(mtk->mcu_clk))
 		return PTR_ERR(mtk->mcu_clk);
 
-	mtk->dma_clk = optional_clk_get(dev, "dma_ck");
+	mtk->dma_clk = devm_clk_get_optional(dev, "dma_ck");
 	return PTR_ERR_OR_ZERO(mtk->dma_clk);
 }
 
diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index 0ac4ec975547..998241f5fce3 100644
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -165,8 +165,6 @@ static int xhci_plat_probe(struct platform_device *pdev)
 	struct xhci_hcd		*xhci;
 	struct resource         *res;
 	struct usb_hcd		*hcd;
-	struct clk              *clk;
-	struct clk              *reg_clk;
 	int			ret;
 	int			irq;
 
@@ -235,31 +233,32 @@ static int xhci_plat_probe(struct platform_device *pdev)
 	hcd->rsrc_start = res->start;
 	hcd->rsrc_len = resource_size(res);
 
+	xhci = hcd_to_xhci(hcd);
+
 	/*
 	 * Not all platforms have clks so it is not an error if the
 	 * clock do not exist.
 	 */
-	reg_clk = devm_clk_get(&pdev->dev, "reg");
-	if (!IS_ERR(reg_clk)) {
-		ret = clk_prepare_enable(reg_clk);
-		if (ret)
-			goto put_hcd;
-	} else if (PTR_ERR(reg_clk) == -EPROBE_DEFER) {
-		ret = -EPROBE_DEFER;
+	xhci->reg_clk = devm_clk_get_optional(&pdev->dev, "reg");
+	if (IS_ERR(xhci->reg_clk)) {
+		ret = PTR_ERR(xhci->reg_clk);
 		goto put_hcd;
 	}
 
-	clk = devm_clk_get(&pdev->dev, NULL);
-	if (!IS_ERR(clk)) {
-		ret = clk_prepare_enable(clk);
-		if (ret)
-			goto disable_reg_clk;
-	} else if (PTR_ERR(clk) == -EPROBE_DEFER) {
-		ret = -EPROBE_DEFER;
+	ret = clk_prepare_enable(xhci->reg_clk);
+	if (ret)
+		goto put_hcd;
+
+	xhci->clk = devm_clk_get_optional(&pdev->dev, NULL);
+	if (IS_ERR(xhci->clk)) {
+		ret = PTR_ERR(xhci->clk);
 		goto disable_reg_clk;
 	}
 
-	xhci = hcd_to_xhci(hcd);
+	ret = clk_prepare_enable(xhci->clk);
+	if (ret)
+		goto disable_reg_clk;
+
 	priv_match = of_device_get_match_data(&pdev->dev);
 	if (priv_match) {
 		struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd);
@@ -271,8 +270,6 @@ static int xhci_plat_probe(struct platform_device *pdev)
 
 	device_wakeup_enable(hcd->self.controller);
 
-	xhci->clk = clk;
-	xhci->reg_clk = reg_clk;
 	xhci->main_hcd = hcd;
 	xhci->shared_hcd = __usb_create_hcd(driver, sysdev, &pdev->dev,
 			dev_name(&pdev->dev), hcd);
@@ -348,10 +345,10 @@ put_usb3_hcd:
 	usb_put_hcd(xhci->shared_hcd);
 
 disable_clk:
-	clk_disable_unprepare(clk);
+	clk_disable_unprepare(xhci->clk);
 
 disable_reg_clk:
-	clk_disable_unprepare(reg_clk);
+	clk_disable_unprepare(xhci->reg_clk);
 
 put_hcd:
 	usb_put_hcd(hcd);
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index 9215a28dad40..fed3385aeac0 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -1569,18 +1569,19 @@ static void handle_port_status(struct xhci_hcd *xhci,
 			  "WARN: xHC returned failed port status event\n");
 
 	port_id = GET_PORT_ID(le32_to_cpu(event->generic.field[0]));
-	xhci_dbg(xhci, "Port Status Change Event for port %d\n", port_id);
-
 	max_ports = HCS_MAX_PORTS(xhci->hcs_params1);
+
 	if ((port_id <= 0) || (port_id > max_ports)) {
-		xhci_warn(xhci, "Invalid port id %d\n", port_id);
+		xhci_warn(xhci, "Port change event with invalid port ID %d\n",
+			  port_id);
 		inc_deq(xhci, xhci->event_ring);
 		return;
 	}
 
 	port = &xhci->hw_ports[port_id - 1];
 	if (!port || !port->rhub || port->hcd_portnum == DUPLICATE_ENTRY) {
-		xhci_warn(xhci, "Event for invalid port %u\n", port_id);
+		xhci_warn(xhci, "Port change event, no port for port ID %u\n",
+			  port_id);
 		bogus_port_status = true;
 		goto cleanup;
 	}
@@ -1597,6 +1598,9 @@ static void handle_port_status(struct xhci_hcd *xhci,
 	hcd_portnum = port->hcd_portnum;
 	portsc = readl(port->addr);
 
+	xhci_dbg(xhci, "Port change event, %d-%d, id %d, portsc: 0x%x\n",
+		 hcd->self.busnum, hcd_portnum + 1, port_id, portsc);
+
 	trace_xhci_handle_port_status(hcd_portnum, portsc);
 
 	if (hcd->state == HC_STATE_SUSPENDED) {
@@ -3275,6 +3279,12 @@ int xhci_queue_bulk_tx(struct xhci_hcd *xhci, gfp_t mem_flags,
 			field |= TRB_IOC;
 			more_trbs_coming = false;
 			td->last_trb = ring->enqueue;
+
+			if (xhci_urb_suitable_for_idt(urb)) {
+				memcpy(&send_addr, urb->transfer_buffer,
+				       trb_buff_len);
+				field |= TRB_IDT;
+			}
 		}
 
 		/* Only set interrupt on short packet for IN endpoints */
@@ -3414,6 +3424,12 @@ int xhci_queue_ctrl_tx(struct xhci_hcd *xhci, gfp_t mem_flags,
 	if (urb->transfer_buffer_length > 0) {
 		u32 length_field, remainder;
 
+		if (xhci_urb_suitable_for_idt(urb)) {
+			memcpy(&urb->transfer_dma, urb->transfer_buffer,
+			       urb->transfer_buffer_length);
+			field |= TRB_IDT;
+		}
+
 		remainder = xhci_td_remainder(xhci, 0,
 				urb->transfer_buffer_length,
 				urb->transfer_buffer_length,
diff --git a/drivers/usb/host/xhci-tegra.c b/drivers/usb/host/xhci-tegra.c
index efb0cad8710e..294158113d62 100644
--- a/drivers/usb/host/xhci-tegra.c
+++ b/drivers/usb/host/xhci-tegra.c
@@ -161,6 +161,7 @@ struct tegra_xusb_soc {
 	} ports;
 
 	bool scale_ss_clock;
+	bool has_ipfs;
 };
 
 struct tegra_xusb {
@@ -637,16 +638,18 @@ static irqreturn_t tegra_xusb_mbox_thread(int irq, void *data)
 	return IRQ_HANDLED;
 }
 
-static void tegra_xusb_ipfs_config(struct tegra_xusb *tegra,
-				   struct resource *regs)
+static void tegra_xusb_config(struct tegra_xusb *tegra,
+			      struct resource *regs)
 {
 	u32 value;
 
-	value = ipfs_readl(tegra, IPFS_XUSB_HOST_CONFIGURATION_0);
-	value |= IPFS_EN_FPCI;
-	ipfs_writel(tegra, value, IPFS_XUSB_HOST_CONFIGURATION_0);
+	if (tegra->soc->has_ipfs) {
+		value = ipfs_readl(tegra, IPFS_XUSB_HOST_CONFIGURATION_0);
+		value |= IPFS_EN_FPCI;
+		ipfs_writel(tegra, value, IPFS_XUSB_HOST_CONFIGURATION_0);
 
-	usleep_range(10, 20);
+		usleep_range(10, 20);
+	}
 
 	/* Program BAR0 space */
 	value = fpci_readl(tegra, XUSB_CFG_4);
@@ -661,13 +664,15 @@ static void tegra_xusb_ipfs_config(struct tegra_xusb *tegra,
 	value |= XUSB_IO_SPACE_EN | XUSB_MEM_SPACE_EN | XUSB_BUS_MASTER_EN;
 	fpci_writel(tegra, value, XUSB_CFG_1);
 
-	/* Enable interrupt assertion */
-	value = ipfs_readl(tegra, IPFS_XUSB_HOST_INTR_MASK_0);
-	value |= IPFS_IP_INT_MASK;
-	ipfs_writel(tegra, value, IPFS_XUSB_HOST_INTR_MASK_0);
+	if (tegra->soc->has_ipfs) {
+		/* Enable interrupt assertion */
+		value = ipfs_readl(tegra, IPFS_XUSB_HOST_INTR_MASK_0);
+		value |= IPFS_IP_INT_MASK;
+		ipfs_writel(tegra, value, IPFS_XUSB_HOST_INTR_MASK_0);
 
-	/* Set hysteresis */
-	ipfs_writel(tegra, 0x80, IPFS_XUSB_HOST_CLKGATE_HYSTERESIS_0);
+		/* Set hysteresis */
+		ipfs_writel(tegra, 0x80, IPFS_XUSB_HOST_CLKGATE_HYSTERESIS_0);
+	}
 }
 
 static int tegra_xusb_clk_enable(struct tegra_xusb *tegra)
@@ -1015,10 +1020,12 @@ static int tegra_xusb_probe(struct platform_device *pdev)
 	if (IS_ERR(tegra->fpci_base))
 		return PTR_ERR(tegra->fpci_base);
 
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
-	tegra->ipfs_base = devm_ioremap_resource(&pdev->dev, res);
-	if (IS_ERR(tegra->ipfs_base))
-		return PTR_ERR(tegra->ipfs_base);
+	if (tegra->soc->has_ipfs) {
+		res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
+		tegra->ipfs_base = devm_ioremap_resource(&pdev->dev, res);
+		if (IS_ERR(tegra->ipfs_base))
+			return PTR_ERR(tegra->ipfs_base);
+	}
 
 	tegra->xhci_irq = platform_get_irq(pdev, 0);
 	if (tegra->xhci_irq < 0)
@@ -1208,7 +1215,7 @@ static int tegra_xusb_probe(struct platform_device *pdev)
 		goto disable_rpm;
 	}
 
-	tegra_xusb_ipfs_config(tegra, regs);
+	tegra_xusb_config(tegra, regs);
 
 	err = tegra_xusb_load_firmware(tegra);
 	if (err < 0) {
@@ -1380,6 +1387,7 @@ static const struct tegra_xusb_soc tegra124_soc = {
 		.usb3 = { .offset = 0, .count = 2, },
 	},
 	.scale_ss_clock = true,
+	.has_ipfs = true,
 };
 MODULE_FIRMWARE("nvidia/tegra124/xusb.bin");
 
@@ -1411,12 +1419,38 @@ static const struct tegra_xusb_soc tegra210_soc = {
 		.usb3 = { .offset = 0, .count = 4, },
 	},
 	.scale_ss_clock = false,
+	.has_ipfs = true,
 };
 MODULE_FIRMWARE("nvidia/tegra210/xusb.bin");
 
+static const char * const tegra186_supply_names[] = {
+};
+
+static const struct tegra_xusb_phy_type tegra186_phy_types[] = {
+	{ .name = "usb3", .num = 3, },
+	{ .name = "usb2", .num = 3, },
+	{ .name = "hsic", .num = 1, },
+};
+
+static const struct tegra_xusb_soc tegra186_soc = {
+	.firmware = "nvidia/tegra186/xusb.bin",
+	.supply_names = tegra186_supply_names,
+	.num_supplies = ARRAY_SIZE(tegra186_supply_names),
+	.phy_types = tegra186_phy_types,
+	.num_types = ARRAY_SIZE(tegra186_phy_types),
+	.ports = {
+		.usb3 = { .offset = 0, .count = 3, },
+		.usb2 = { .offset = 3, .count = 3, },
+		.hsic = { .offset = 6, .count = 1, },
+	},
+	.scale_ss_clock = false,
+	.has_ipfs = false,
+};
+
 static const struct of_device_id tegra_xusb_of_match[] = {
 	{ .compatible = "nvidia,tegra124-xusb", .data = &tegra124_soc },
 	{ .compatible = "nvidia,tegra210-xusb", .data = &tegra210_soc },
+	{ .compatible = "nvidia,tegra186-xusb", .data = &tegra186_soc },
 	{ },
 };
 MODULE_DEVICE_TABLE(of, tegra_xusb_of_match);
diff --git a/drivers/usb/host/xhci-trace.h b/drivers/usb/host/xhci-trace.h
index 88b427434bd8..052a269d86f2 100644
--- a/drivers/usb/host/xhci-trace.h
+++ b/drivers/usb/host/xhci-trace.h
@@ -366,6 +366,11 @@ DEFINE_EVENT(xhci_log_ep_ctx, xhci_handle_cmd_config_ep,
 	TP_ARGS(ctx)
 );
 
+DEFINE_EVENT(xhci_log_ep_ctx, xhci_add_endpoint,
+	TP_PROTO(struct xhci_ep_ctx *ctx),
+	TP_ARGS(ctx)
+);
+
 DECLARE_EVENT_CLASS(xhci_log_slot_ctx,
 	TP_PROTO(struct xhci_slot_ctx *ctx),
 	TP_ARGS(ctx),
@@ -432,6 +437,31 @@ DEFINE_EVENT(xhci_log_slot_ctx, xhci_configure_endpoint,
 	TP_ARGS(ctx)
 );
 
+DECLARE_EVENT_CLASS(xhci_log_ctrl_ctx,
+	TP_PROTO(struct xhci_input_control_ctx *ctrl_ctx),
+	TP_ARGS(ctrl_ctx),
+	TP_STRUCT__entry(
+		__field(u32, drop)
+		__field(u32, add)
+	),
+	TP_fast_assign(
+		__entry->drop = le32_to_cpu(ctrl_ctx->drop_flags);
+		__entry->add = le32_to_cpu(ctrl_ctx->add_flags);
+	),
+	TP_printk("%s", xhci_decode_ctrl_ctx(__entry->drop, __entry->add)
+	)
+);
+
+DEFINE_EVENT(xhci_log_ctrl_ctx, xhci_address_ctrl_ctx,
+	TP_PROTO(struct xhci_input_control_ctx *ctrl_ctx),
+	TP_ARGS(ctrl_ctx)
+);
+
+DEFINE_EVENT(xhci_log_ctrl_ctx, xhci_configure_endpoint_ctrl_ctx,
+	TP_PROTO(struct xhci_input_control_ctx *ctrl_ctx),
+	TP_ARGS(ctrl_ctx)
+);
+
 DECLARE_EVENT_CLASS(xhci_log_ring,
 	TP_PROTO(struct xhci_ring *ring),
 	TP_ARGS(ring),
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 7fa58c99f126..a9bb796794e3 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -893,7 +893,7 @@ static void xhci_disable_port_wake_on_bits(struct xhci_hcd *xhci)
 	struct xhci_port **ports;
 	int port_index;
 	unsigned long flags;
-	u32 t1, t2;
+	u32 t1, t2, portsc;
 
 	spin_lock_irqsave(&xhci->lock, flags);
 
@@ -902,10 +902,15 @@ static void xhci_disable_port_wake_on_bits(struct xhci_hcd *xhci)
 	ports = xhci->usb3_rhub.ports;
 	while (port_index--) {
 		t1 = readl(ports[port_index]->addr);
+		portsc = t1;
 		t1 = xhci_port_state_to_neutral(t1);
 		t2 = t1 & ~PORT_WAKE_BITS;
-		if (t1 != t2)
+		if (t1 != t2) {
 			writel(t2, ports[port_index]->addr);
+			xhci_dbg(xhci, "disable wake bits port %d-%d, portsc: 0x%x, write: 0x%x\n",
+				 xhci->usb3_rhub.hcd->self.busnum,
+				 port_index + 1, portsc, t2);
+		}
 	}
 
 	/* disable usb2 ports Wake bits */
@@ -913,12 +918,16 @@ static void xhci_disable_port_wake_on_bits(struct xhci_hcd *xhci)
 	ports = xhci->usb2_rhub.ports;
 	while (port_index--) {
 		t1 = readl(ports[port_index]->addr);
+		portsc = t1;
 		t1 = xhci_port_state_to_neutral(t1);
 		t2 = t1 & ~PORT_WAKE_BITS;
-		if (t1 != t2)
+		if (t1 != t2) {
 			writel(t2, ports[port_index]->addr);
+			xhci_dbg(xhci, "disable wake bits port %d-%d, portsc: 0x%x, write: 0x%x\n",
+				 xhci->usb2_rhub.hcd->self.busnum,
+				 port_index + 1, portsc, t2);
+		}
 	}
-
 	spin_unlock_irqrestore(&xhci->lock, flags);
 }
 
@@ -1238,6 +1247,21 @@ EXPORT_SYMBOL_GPL(xhci_resume);
 
 /*-------------------------------------------------------------------------*/
 
+/*
+ * Bypass the DMA mapping if URB is suitable for Immediate Transfer (IDT),
+ * we'll copy the actual data into the TRB address register. This is limited to
+ * transfers up to 8 bytes on output endpoints of any kind with wMaxPacketSize
+ * >= 8 bytes. If suitable for IDT only one Transfer TRB per TD is allowed.
+ */
+static int xhci_map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb,
+				gfp_t mem_flags)
+{
+	if (xhci_urb_suitable_for_idt(urb))
+		return 0;
+
+	return usb_hcd_map_urb_for_dma(hcd, urb, mem_flags);
+}
+
 /**
  * xhci_get_endpoint_index - Used for passing endpoint bitmasks between the core and
  * HCDs.  Find the index for an endpoint given its descriptor.  Use the return
@@ -1783,6 +1807,7 @@ static int xhci_add_endpoint(struct usb_hcd *hcd, struct usb_device *udev,
 	struct xhci_container_ctx *in_ctx;
 	unsigned int ep_index;
 	struct xhci_input_control_ctx *ctrl_ctx;
+	struct xhci_ep_ctx *ep_ctx;
 	u32 added_ctxs;
 	u32 new_add_flags, new_drop_flags;
 	struct xhci_virt_device *virt_dev;
@@ -1873,6 +1898,9 @@ static int xhci_add_endpoint(struct usb_hcd *hcd, struct usb_device *udev,
 	/* Store the usb_device pointer for later use */
 	ep->hcpriv = udev;
 
+	ep_ctx = xhci_get_ep_ctx(xhci, virt_dev->in_ctx, ep_index);
+	trace_xhci_add_endpoint(ep_ctx);
+
 	xhci_debugfs_create_endpoint(xhci, virt_dev, ep_index);
 
 	xhci_dbg(xhci, "add ep 0x%x, slot id %d, new drop flags = %#x, new add flags = %#x\n",
@@ -2747,6 +2775,8 @@ static int xhci_configure_endpoint(struct xhci_hcd *xhci,
 	}
 
 	slot_ctx = xhci_get_slot_ctx(xhci, command->in_ctx);
+
+	trace_xhci_configure_endpoint_ctrl_ctx(ctrl_ctx);
 	trace_xhci_configure_endpoint(slot_ctx);
 
 	if (!ctx_change)
@@ -4012,6 +4042,7 @@ static int xhci_setup_device(struct usb_hcd *hcd, struct usb_device *udev,
 	trace_xhci_address_ctx(xhci, virt_dev->in_ctx,
 				le32_to_cpu(slot_ctx->dev_info) >> 27);
 
+	trace_xhci_address_ctrl_ctx(ctrl_ctx);
 	spin_lock_irqsave(&xhci->lock, flags);
 	trace_xhci_setup_device(virt_dev);
 	ret = xhci_queue_address_device(xhci, command, virt_dev->in_ctx->dma,
@@ -5154,6 +5185,7 @@ static const struct hc_driver xhci_hc_driver = {
 	/*
 	 * managing i/o requests and associated device resources
 	 */
+	.map_urb_for_dma =      xhci_map_urb_for_dma,
 	.urb_enqueue =		xhci_urb_enqueue,
 	.urb_dequeue =		xhci_urb_dequeue,
 	.alloc_dev =		xhci_alloc_dev,
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index 9334cdee382a..a450a99e90eb 100644
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -1303,6 +1303,8 @@ enum xhci_setup_dev {
 #define TRB_IOC			(1<<5)
 /* The buffer pointer contains immediate data */
 #define TRB_IDT			(1<<6)
+/* TDs smaller than this might use IDT */
+#define TRB_IDT_MAX_SIZE	8
 
 /* Block Event Interrupt */
 #define	TRB_BEI			(1<<9)
@@ -2149,6 +2151,21 @@ static inline struct xhci_ring *xhci_urb_to_transfer_ring(struct xhci_hcd *xhci,
 					urb->stream_id);
 }
 
+/*
+ * TODO: As per spec Isochronous IDT transmissions are supported. We bypass
+ * them anyways as we where unable to find a device that matches the
+ * constraints.
+ */
+static inline bool xhci_urb_suitable_for_idt(struct urb *urb)
+{
+	if (!usb_endpoint_xfer_isoc(&urb->ep->desc) && usb_urb_dir_out(urb) &&
+	    usb_endpoint_maxp(&urb->ep->desc) >= TRB_IDT_MAX_SIZE &&
+	    urb->transfer_buffer_length <= TRB_IDT_MAX_SIZE)
+		return true;
+
+	return false;
+}
+
 static inline char *xhci_slot_state_string(u32 state)
 {
 	switch (state) {
@@ -2384,6 +2401,35 @@ static inline const char *xhci_decode_trb(u32 field0, u32 field1, u32 field2,
 	return str;
 }
 
+static inline const char *xhci_decode_ctrl_ctx(unsigned long drop,
+					       unsigned long add)
+{
+	static char	str[1024];
+	unsigned int	bit;
+	int		ret = 0;
+
+	if (drop) {
+		ret = sprintf(str, "Drop:");
+		for_each_set_bit(bit, &drop, 32)
+			ret += sprintf(str + ret, " %d%s",
+				       bit / 2,
+				       bit % 2 ? "in":"out");
+		ret += sprintf(str + ret, ", ");
+	}
+
+	if (add) {
+		ret += sprintf(str + ret, "Add:%s%s",
+			       (add & SLOT_FLAG) ? " slot":"",
+			       (add & EP0_FLAG) ? " ep0":"");
+		add &= ~(SLOT_FLAG | EP0_FLAG);
+		for_each_set_bit(bit, &add, 32)
+			ret += sprintf(str + ret, " %d%s",
+				       bit / 2,
+				       bit % 2 ? "in":"out");
+	}
+	return str;
+}
+
 static inline const char *xhci_decode_slot_context(u32 info, u32 info2,
 		u32 tt_info, u32 state)
 {
diff --git a/drivers/usb/isp1760/isp1760-hcd.c b/drivers/usb/isp1760/isp1760-hcd.c
index 8142c6b4c4cf..320fc4739835 100644
--- a/drivers/usb/isp1760/isp1760-hcd.c
+++ b/drivers/usb/isp1760/isp1760-hcd.c
@@ -788,11 +788,11 @@ static void collect_qtds(struct usb_hcd *hcd, struct isp1760_qh *qh,
 					mem_reads8(hcd->regs, qtd->payload_addr,
 							qtd->data_buffer,
 							qtd->actual_length);
-					/* Fall through (?) */
+					/* Fall through */
 				case OUT_PID:
 					qtd->urb->actual_length +=
 							qtd->actual_length;
-					/* Fall through ... */
+					/* Fall through */
 				case SETUP_PID:
 					break;
 				}
diff --git a/drivers/usb/misc/usb251xb.c b/drivers/usb/misc/usb251xb.c
index 04684849d683..4d6ae3795a88 100644
--- a/drivers/usb/misc/usb251xb.c
+++ b/drivers/usb/misc/usb251xb.c
@@ -12,6 +12,7 @@
 
 #include <linux/delay.h>
 #include <linux/gpio/consumer.h>
+#include <linux/gpio/driver.h>
 #include <linux/i2c.h>
 #include <linux/module.h>
 #include <linux/nls.h>
@@ -222,11 +223,51 @@ static const struct usb251xb_data usb2517i_data = {
 	.product_str = "USB2517i",
 };
 
+#ifdef CONFIG_GPIOLIB
+static int usb251xb_check_dev_children(struct device *dev, void *child)
+{
+	if (dev->type == &i2c_adapter_type) {
+		return device_for_each_child(dev, child,
+					     usb251xb_check_dev_children);
+	}
+
+	return (dev == child);
+}
+
+static int usb251x_check_gpio_chip(struct usb251xb *hub)
+{
+	struct gpio_chip *gc = gpiod_to_chip(hub->gpio_reset);
+	struct i2c_adapter *adap = hub->i2c->adapter;
+	int ret;
+
+	if (!hub->gpio_reset)
+		return 0;
+
+	if (!gc)
+		return -EINVAL;
+
+	ret = usb251xb_check_dev_children(&adap->dev, gc->parent);
+	if (ret) {
+		dev_err(hub->dev, "Reset GPIO chip is at the same i2c-bus\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+#else
+static int usb251x_check_gpio_chip(struct usb251xb *hub)
+{
+	return 0;
+}
+#endif
+
 static void usb251xb_reset(struct usb251xb *hub, int state)
 {
 	if (!hub->gpio_reset)
 		return;
 
+	i2c_lock_bus(hub->i2c->adapter, I2C_LOCK_SEGMENT);
+
 	gpiod_set_value_cansleep(hub->gpio_reset, state);
 
 	/* wait for hub recovery/stabilization */
@@ -234,6 +275,8 @@ static void usb251xb_reset(struct usb251xb *hub, int state)
 		usleep_range(500, 750);	/* >=500us at power on */
 	else
 		usleep_range(1, 10);	/* >=1us at power down */
+
+	i2c_unlock_bus(hub->i2c->adapter, I2C_LOCK_SEGMENT);
 }
 
 static int usb251xb_connect(struct usb251xb *hub)
@@ -331,18 +374,31 @@ out_err:
 }
 
 #ifdef CONFIG_OF
+static void usb251xb_get_ports_field(struct usb251xb *hub,
+				    const char *prop_name, u8 port_cnt, u8 *fld)
+{
+	struct device *dev = hub->dev;
+	struct property *prop;
+	const __be32 *p;
+	u32 port;
+
+	of_property_for_each_u32(dev->of_node, prop_name, prop, p, port) {
+		if ((port >= 1) && (port <= port_cnt))
+			*fld |= BIT(port);
+		else
+			dev_warn(dev, "port %u doesn't exist\n", port);
+	}
+}
+
 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 port, property_u32 = 0;
-	const u32 *cproperty_u32;
+	int len, err;
+	u32 property_u32 = 0;
 	const char *cproperty_char;
 	char str[USB251XB_STRING_BUFSIZE / 2];
-	struct property *prop;
-	const __be32 *p;
 
 	if (!np) {
 		dev_err(dev, "failed to get ofdata\n");
@@ -444,46 +500,16 @@ static int usb251xb_get_ofdata(struct usb251xb *hub,
 		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 <= data->port_cnt))
-				hub->non_rem_dev |= BIT(port);
-			else
-				dev_warn(dev, "NRD port %u doesn't exist\n",
-					port);
-		}
-	}
+	usb251xb_get_ports_field(hub, "non-removable-ports", data->port_cnt,
+				 &hub->non_rem_dev);
 
 	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 <= data->port_cnt))
-				hub->port_disable_sp |= BIT(port);
-			else
-				dev_warn(dev, "PDS port %u doesn't exist\n",
-					port);
-		}
-	}
+	usb251xb_get_ports_field(hub, "sp-disabled-ports", data->port_cnt,
+				 &hub->port_disable_sp);
 
 	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 <= data->port_cnt))
-				hub->port_disable_bp |= BIT(port);
-			else
-				dev_warn(dev, "PDB port %u doesn't exist\n",
-					port);
-		}
-	}
+	usb251xb_get_ports_field(hub, "bp-disabled-ports", data->port_cnt,
+				 &hub->port_disable_bp);
 
 	hub->max_power_sp = USB251XB_DEF_MAX_POWER_SELF;
 	if (!of_property_read_u32(np, "sp-max-total-current-microamp",
@@ -546,10 +572,10 @@ static int usb251xb_get_ofdata(struct usb251xb *hub,
 	 * register controls the USB DP/DM signal swapping for each port.
 	 */
 	hub->port_swap = USB251XB_DEF_PORT_SWAP;
-	of_property_for_each_u32(np, "swap-dx-lanes", prop, p, port) {
-		if (port <= data->port_cnt)
-			hub->port_swap |= BIT(port);
-	}
+	usb251xb_get_ports_field(hub, "swap-dx-lanes", data->port_cnt,
+				 &hub->port_swap);
+	if (of_get_property(np, "swap-us-lanes", NULL))
+		hub->port_swap |= BIT(0);
 
 	/* The following parameters are currently not exposed to devicetree, but
 	 * may be as soon as needed.
@@ -621,6 +647,25 @@ static int usb251xb_probe(struct usb251xb *hub)
 		}
 	}
 
+	/*
+	 * usb251x SMBus-slave SCL lane is muxed with CFG_SEL0 pin. So if anyone
+	 * tries to work with the bus at the moment the hub reset is released,
+	 * it may cause an invalid config being latched by usb251x. Particularly
+	 * one of the config modes makes the hub loading a default registers
+	 * value without SMBus-slave interface activation. If the hub
+	 * accidentally gets this mode, this will cause the driver SMBus-
+	 * functions failure. Normally we could just lock the SMBus-segment the
+	 * hub i2c-interface resides for the device-specific reset timing. But
+	 * the GPIO controller, which is used to handle the hub reset, might be
+	 * placed at the same i2c-bus segment. In this case an error should be
+	 * returned since we can't safely use the GPIO controller to clear the
+	 * reset state (it may affect the hub configuration) and we can't lock
+	 * the i2c-bus segment (it will cause a deadlock).
+	 */
+	err = usb251x_check_gpio_chip(hub);
+	if (err)
+		return err;
+
 	err = usb251xb_connect(hub);
 	if (err) {
 		dev_err(dev, "Failed to connect hub (%d)\n", err);
diff --git a/drivers/usb/misc/usb3503.c b/drivers/usb/misc/usb3503.c
index d5141aa79dd4..72f39a9751b5 100644
--- a/drivers/usb/misc/usb3503.c
+++ b/drivers/usb/misc/usb3503.c
@@ -172,7 +172,6 @@ static int usb3503_probe(struct usb3503 *hub)
 		hub->gpio_reset		= pdata->gpio_reset;
 		hub->mode		= pdata->initial_mode;
 	} else if (np) {
-		struct clk *clk;
 		u32 rate = 0;
 		hub->port_off_mask = 0;
 
@@ -198,34 +197,29 @@ static int usb3503_probe(struct usb3503 *hub)
 			}
 		}
 
-		clk = devm_clk_get(dev, "refclk");
-		if (IS_ERR(clk) && PTR_ERR(clk) != -ENOENT) {
+		hub->clk = devm_clk_get_optional(dev, "refclk");
+		if (IS_ERR(hub->clk)) {
 			dev_err(dev, "unable to request refclk (%ld)\n",
-					PTR_ERR(clk));
-			return PTR_ERR(clk);
+					PTR_ERR(hub->clk));
+			return PTR_ERR(hub->clk);
 		}
 
-		if (!IS_ERR(clk)) {
-			hub->clk = clk;
-
-			if (rate != 0) {
-				err = clk_set_rate(hub->clk, rate);
-				if (err) {
-					dev_err(dev,
-						"unable to set reference clock rate to %d\n",
-						(int) rate);
-					return err;
-				}
-			}
-
-			err = clk_prepare_enable(hub->clk);
+		if (rate != 0) {
+			err = clk_set_rate(hub->clk, rate);
 			if (err) {
 				dev_err(dev,
-					"unable to enable reference clock\n");
+					"unable to set reference clock rate to %d\n",
+					(int)rate);
 				return err;
 			}
 		}
 
+		err = clk_prepare_enable(hub->clk);
+		if (err) {
+			dev_err(dev, "unable to enable reference clock\n");
+			return err;
+		}
+
 		property = of_get_property(np, "disabled-ports", &len);
 		if (property && (len / sizeof(u32)) > 0) {
 			int i;
@@ -324,8 +318,7 @@ static int usb3503_i2c_remove(struct i2c_client *i2c)
 	struct usb3503 *hub;
 
 	hub = i2c_get_clientdata(i2c);
-	if (hub->clk)
-		clk_disable_unprepare(hub->clk);
+	clk_disable_unprepare(hub->clk);
 
 	return 0;
 }
@@ -348,8 +341,7 @@ static int usb3503_platform_remove(struct platform_device *pdev)
 	struct usb3503 *hub;
 
 	hub = platform_get_drvdata(pdev);
-	if (hub->clk)
-		clk_disable_unprepare(hub->clk);
+	clk_disable_unprepare(hub->clk);
 
 	return 0;
 }
@@ -358,18 +350,14 @@ static int usb3503_platform_remove(struct platform_device *pdev)
 static int usb3503_suspend(struct usb3503 *hub)
 {
 	usb3503_switch_mode(hub, USB3503_MODE_STANDBY);
-
-	if (hub->clk)
-		clk_disable_unprepare(hub->clk);
+	clk_disable_unprepare(hub->clk);
 
 	return 0;
 }
 
 static int usb3503_resume(struct usb3503 *hub)
 {
-	if (hub->clk)
-		clk_prepare_enable(hub->clk);
-
+	clk_prepare_enable(hub->clk);
 	usb3503_switch_mode(hub, hub->mode);
 
 	return 0;
diff --git a/drivers/usb/mtu3/Makefile b/drivers/usb/mtu3/Makefile
index 4a9715812bf9..3bf8cbcc1add 100644
--- a/drivers/usb/mtu3/Makefile
+++ b/drivers/usb/mtu3/Makefile
@@ -2,10 +2,17 @@
 
 ccflags-$(CONFIG_USB_MTU3_DEBUG)	+= -DDEBUG
 
+# define_trace.h needs to know how to find our header
+CFLAGS_mtu3_trace.o	:= -I$(src)
+
 obj-$(CONFIG_USB_MTU3)	+= mtu3.o
 
 mtu3-y	:= mtu3_plat.o
 
+ifneq ($(CONFIG_TRACING),)
+	mtu3-y	+= mtu3_trace.o
+endif
+
 ifneq ($(filter y,$(CONFIG_USB_MTU3_HOST) $(CONFIG_USB_MTU3_DUAL_ROLE)),)
 	mtu3-y	+= mtu3_host.o
 endif
@@ -17,3 +24,7 @@ endif
 ifneq ($(CONFIG_USB_MTU3_DUAL_ROLE),)
 	mtu3-y	+= mtu3_dr.o
 endif
+
+ifneq ($(CONFIG_DEBUG_FS),)
+	mtu3-y	+= mtu3_debugfs.o
+endif
diff --git a/drivers/usb/mtu3/mtu3.h b/drivers/usb/mtu3/mtu3.h
index 87823ac0d120..76ecf12fdf62 100644
--- a/drivers/usb/mtu3/mtu3.h
+++ b/drivers/usb/mtu3/mtu3.h
@@ -63,6 +63,15 @@ struct mtu3_request;
 #define MTU3_U2_IP_SLOT_DEFAULT 1
 
 /**
+ * IP TRUNK version
+ * from 0x1003 version, USB3 Gen2 is supported, two changes affect driver:
+ * 1. MAXPKT and MULTI bits layout of TXCSR1 and RXCSR1 are adjusted,
+ *    but not backward compatible
+ * 2. QMU extend buffer length supported
+ */
+#define MTU3_TRUNK_VERS_1003	0x1003
+
+/**
  * Normally the device works on HS or SS, to simplify fifo management,
  * devide fifo into some 512B parts, use bitmap to manage it; And
  * 128 bits size of bitmap is large enough, that means it can manage
@@ -135,45 +144,33 @@ struct mtu3_fifo_info {
  *	The format of TX GPD is a little different from RX one.
  *	And the size of GPD is 16 bytes.
  *
- * @flag:
+ * @dw0_info:
  *	bit0: Hardware Own (HWO)
  *	bit1: Buffer Descriptor Present (BDP), always 0, BD is not supported
  *	bit2: Bypass (BPS), 1: HW skips this GPD if HWO = 1
+ *	bit6: [EL] Zero Length Packet (ZLP), moved from @dw3_info[29]
  *	bit7: Interrupt On Completion (IOC)
- * @chksum: This is used to validate the contents of this GPD;
- *	If TXQ_CS_EN / RXQ_CS_EN bit is set, an interrupt is issued
- *	when checksum validation fails;
- *	Checksum value is calculated over the 16 bytes of the GPD by default;
- * @data_buf_len (RX ONLY): This value indicates the length of
- *	the assigned data buffer
- * @tx_ext_addr (TX ONLY): [3:0] are 4 extension bits of @buffer,
- *	[7:4] are 4 extension bits of @next_gpd
+ *	bit[31:16]: ([EL] bit[31:12]) allow data buffer length (RX ONLY),
+ *		the buffer length of the data to receive
+ *	bit[23:16]: ([EL] bit[31:24]) extension address (TX ONLY),
+ *		lower 4 bits are extension bits of @buffer,
+ *		upper 4 bits are extension bits of @next_gpd
  * @next_gpd: Physical address of the next GPD
  * @buffer: Physical address of the data buffer
- * @buf_len:
- *	(TX): This value indicates the length of the assigned data buffer
- *	(RX): The total length of data received
- * @ext_len: reserved
- * @rx_ext_addr(RX ONLY): [3:0] are 4 extension bits of @buffer,
- *	[7:4] are 4 extension bits of @next_gpd
- * @ext_flag:
- *	bit5 (TX ONLY): Zero Length Packet (ZLP),
+ * @dw3_info:
+ *	bit[15:0]: ([EL] bit[19:0]) data buffer length,
+ *		(TX): the buffer length of the data to transmit
+ *		(RX): The total length of data received
+ *	bit[23:16]: ([EL] bit[31:24]) extension address (RX ONLY),
+ *		lower 4 bits are extension bits of @buffer,
+ *		upper 4 bits are extension bits of @next_gpd
+ *	bit29: ([EL] abandoned) Zero Length Packet (ZLP) (TX ONLY)
  */
 struct qmu_gpd {
-	__u8 flag;
-	__u8 chksum;
-	union {
-		__le16 data_buf_len;
-		__le16 tx_ext_addr;
-	};
+	__le32 dw0_info;
 	__le32 next_gpd;
 	__le32 buffer;
-	__le16 buf_len;
-	union {
-		__u8 ext_len;
-		__u8 rx_ext_addr;
-	};
-	__u8 ext_flag;
+	__le32 dw3_info;
 } __packed;
 
 /**
@@ -316,6 +313,7 @@ static inline struct ssusb_mtk *dev_to_ssusb(struct device *dev)
  * @may_wakeup: means device's remote wakeup is enabled
  * @is_self_powered: is reported in device status and the config descriptor
  * @delayed_status: true when function drivers ask for delayed status
+ * @gen2cp: compatible with USB3 Gen2 IP
  * @ep0_req: dummy request used while handling standard USB requests
  *		for GET_STATUS and SET_SEL
  * @setup_buf: ep0 response buffer for GET_STATUS and SET_SEL requests
@@ -356,6 +354,7 @@ struct mtu3 {
 	unsigned u2_enable:1;
 	unsigned is_u3_ip:1;
 	unsigned delayed_status:1;
+	unsigned gen2cp:1;
 
 	u8 address;
 	u8 test_mode_nr;
diff --git a/drivers/usb/mtu3/mtu3_core.c b/drivers/usb/mtu3/mtu3_core.c
index 4fee200795a5..f8bd1d57e795 100644
--- a/drivers/usb/mtu3/mtu3_core.c
+++ b/drivers/usb/mtu3/mtu3_core.c
@@ -16,6 +16,8 @@
 #include <linux/platform_device.h>
 
 #include "mtu3.h"
+#include "mtu3_debug.h"
+#include "mtu3_trace.h"
 
 static int ep_fifo_alloc(struct mtu3_ep *mep, u32 seg_size)
 {
@@ -299,6 +301,7 @@ int mtu3_config_ep(struct mtu3 *mtu, struct mtu3_ep *mep,
 			int interval, int burst, int mult)
 {
 	void __iomem *mbase = mtu->mac_base;
+	bool gen2cp = mtu->gen2cp;
 	int epnum = mep->epnum;
 	u32 csr0, csr1, csr2;
 	int fifo_sgsz, fifo_addr;
@@ -319,7 +322,7 @@ int mtu3_config_ep(struct mtu3 *mtu, struct mtu3_ep *mep,
 
 		num_pkts = (burst + 1) * (mult + 1) - 1;
 		csr1 = TX_SS_BURST(burst) | TX_SLOT(mep->slot);
-		csr1 |= TX_MAX_PKT(num_pkts) | TX_MULT(mult);
+		csr1 |= TX_MAX_PKT(gen2cp, num_pkts) | TX_MULT(gen2cp, mult);
 
 		csr2 = TX_FIFOADDR(fifo_addr >> 4);
 		csr2 |= TX_FIFOSEGSIZE(fifo_sgsz);
@@ -355,7 +358,7 @@ int mtu3_config_ep(struct mtu3 *mtu, struct mtu3_ep *mep,
 
 		num_pkts = (burst + 1) * (mult + 1) - 1;
 		csr1 = RX_SS_BURST(burst) | RX_SLOT(mep->slot);
-		csr1 |= RX_MAX_PKT(num_pkts) | RX_MULT(mult);
+		csr1 |= RX_MAX_PKT(gen2cp, num_pkts) | RX_MULT(gen2cp, mult);
 
 		csr2 = RX_FIFOADDR(fifo_addr >> 4);
 		csr2 |= RX_FIFOSEGSIZE(fifo_sgsz);
@@ -600,6 +603,10 @@ static void mtu3_regs_init(struct mtu3 *mtu)
 	mtu3_clrbits(mbase, U3D_MISC_CTRL, VBUS_FRC_EN | VBUS_ON);
 	/* enable automatical HWRW from L1 */
 	mtu3_setbits(mbase, U3D_POWER_MANAGEMENT, LPM_HRWE);
+
+	/* use new QMU format when HW version >= 0x1003 */
+	if (mtu->gen2cp)
+		mtu3_writel(mbase, U3D_QFCR, ~0x0);
 }
 
 static irqreturn_t mtu3_link_isr(struct mtu3 *mtu)
@@ -650,6 +657,8 @@ static irqreturn_t mtu3_link_isr(struct mtu3 *mtu)
 		break;
 	}
 	dev_dbg(mtu->dev, "%s: %s\n", __func__, usb_speed_string(udev_speed));
+	mtu3_dbg_trace(mtu->dev, "link speed %s",
+		       usb_speed_string(udev_speed));
 
 	mtu->g.speed = udev_speed;
 	mtu->g.ep0->maxpacket = maxpkt;
@@ -672,6 +681,7 @@ static irqreturn_t mtu3_u3_ltssm_isr(struct mtu3 *mtu)
 	ltssm &= mtu3_readl(mbase, U3D_LTSSM_INTR_ENABLE);
 	mtu3_writel(mbase, U3D_LTSSM_INTR, ltssm); /* W1C */
 	dev_dbg(mtu->dev, "=== LTSSM[%x] ===\n", ltssm);
+	trace_mtu3_u3_ltssm_isr(ltssm);
 
 	if (ltssm & (HOT_RST_INTR | WARM_RST_INTR))
 		mtu3_gadget_reset(mtu);
@@ -702,6 +712,7 @@ static irqreturn_t mtu3_u2_common_isr(struct mtu3 *mtu)
 	u2comm &= mtu3_readl(mbase, U3D_COMMON_USB_INTR_ENABLE);
 	mtu3_writel(mbase, U3D_COMMON_USB_INTR, u2comm); /* W1C */
 	dev_dbg(mtu->dev, "=== U2COMM[%x] ===\n", u2comm);
+	trace_mtu3_u2_common_isr(u2comm);
 
 	if (u2comm & SUSPEND_INTR)
 		mtu3_gadget_suspend(mtu);
@@ -749,13 +760,15 @@ static irqreturn_t mtu3_irq(int irq, void *data)
 
 static int mtu3_hw_init(struct mtu3 *mtu)
 {
-	u32 cap_dev;
+	u32 value;
 	int ret;
 
-	mtu->hw_version = mtu3_readl(mtu->ippc_base, U3D_SSUSB_HW_ID);
+	value = mtu3_readl(mtu->ippc_base, U3D_SSUSB_IP_TRUNK_VERS);
+	mtu->hw_version = IP_TRUNK_VERS(value);
+	mtu->gen2cp = !!(mtu->hw_version >= MTU3_TRUNK_VERS_1003);
 
-	cap_dev = mtu3_readl(mtu->ippc_base, U3D_SSUSB_IP_DEV_CAP);
-	mtu->is_u3_ip = !!SSUSB_IP_DEV_U3_PORT_NUM(cap_dev);
+	value = mtu3_readl(mtu->ippc_base, U3D_SSUSB_IP_DEV_CAP);
+	mtu->is_u3_ip = !!SSUSB_IP_DEV_U3_PORT_NUM(value);
 
 	dev_info(mtu->dev, "IP version 0x%x(%s IP)\n", mtu->hw_version,
 		mtu->is_u3_ip ? "U3" : "U2");
@@ -893,6 +906,8 @@ int ssusb_gadget_init(struct ssusb_mtk *ssusb)
 	if (mtu->ssusb->dr_mode == USB_DR_MODE_OTG)
 		mtu3_stop(mtu);
 
+	ssusb_dev_debugfs_init(ssusb);
+
 	dev_dbg(dev, " %s() done...\n", __func__);
 
 	return 0;
diff --git a/drivers/usb/mtu3/mtu3_debug.h b/drivers/usb/mtu3/mtu3_debug.h
new file mode 100644
index 000000000000..e96a69234d05
--- /dev/null
+++ b/drivers/usb/mtu3/mtu3_debug.h
@@ -0,0 +1,50 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * mtu3_debug.h - debug header
+ *
+ * Copyright (C) 2019 MediaTek Inc.
+ *
+ * Author: Chunfeng Yun <chunfeng.yun@mediatek.com>
+ */
+
+#ifndef __MTU3_DEBUG_H__
+#define __MTU3_DEBUG_H__
+
+#include <linux/debugfs.h>
+
+#define MTU3_DEBUGFS_NAME_LEN 32
+
+struct mtu3_regset {
+	char name[MTU3_DEBUGFS_NAME_LEN];
+	struct debugfs_regset32 regset;
+	size_t nregs;
+};
+
+struct mtu3_file_map {
+	const char *name;
+	int (*show)(struct seq_file *s, void *unused);
+};
+
+#if IS_ENABLED(CONFIG_DEBUG_FS)
+void ssusb_dev_debugfs_init(struct ssusb_mtk *ssusb);
+void ssusb_dr_debugfs_init(struct ssusb_mtk *ssusb);
+void ssusb_debugfs_create_root(struct ssusb_mtk *ssusb);
+void ssusb_debugfs_remove_root(struct ssusb_mtk *ssusb);
+
+#else
+static inline void ssusb_dev_debugfs_init(struct ssusb_mtk *ssusb) {}
+static inline void ssusb_dr_debugfs_init(struct ssusb_mtk *ssusb) {}
+static inline void ssusb_debugfs_create_root(struct ssusb_mtk *ssusb) {}
+static inline void ssusb_debugfs_remove_root(struct ssusb_mtk *ssusb) {}
+
+#endif /* CONFIG_DEBUG_FS */
+
+#if IS_ENABLED(CONFIG_TRACING)
+void mtu3_dbg_trace(struct device *dev, const char *fmt, ...);
+
+#else
+static inline void mtu3_dbg_trace(struct device *dev, const char *fmt, ...) {}
+
+#endif /* CONFIG_TRACING */
+
+#endif /* __MTU3_DEBUG_H__ */
diff --git a/drivers/usb/mtu3/mtu3_debugfs.c b/drivers/usb/mtu3/mtu3_debugfs.c
new file mode 100644
index 000000000000..62c57ddc554e
--- /dev/null
+++ b/drivers/usb/mtu3/mtu3_debugfs.c
@@ -0,0 +1,539 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * mtu3_debugfs.c - debugfs interface
+ *
+ * Copyright (C) 2019 MediaTek Inc.
+ *
+ * Author: Chunfeng Yun <chunfeng.yun@mediatek.com>
+ */
+
+#include <linux/uaccess.h>
+
+#include "mtu3.h"
+#include "mtu3_dr.h"
+#include "mtu3_debug.h"
+
+#define dump_register(nm)		\
+{					\
+	.name = __stringify(nm),	\
+	.offset = U3D_ ##nm,		\
+}
+
+#define dump_prb_reg(nm, os)	\
+{				\
+	.name = nm,		\
+	.offset = os,		\
+}
+
+static const struct debugfs_reg32 mtu3_ippc_regs[] = {
+	dump_register(SSUSB_IP_PW_CTRL0),
+	dump_register(SSUSB_IP_PW_CTRL1),
+	dump_register(SSUSB_IP_PW_CTRL2),
+	dump_register(SSUSB_IP_PW_CTRL3),
+	dump_register(SSUSB_OTG_STS),
+	dump_register(SSUSB_IP_XHCI_CAP),
+	dump_register(SSUSB_IP_DEV_CAP),
+	dump_register(SSUSB_U3_CTRL_0P),
+	dump_register(SSUSB_U2_CTRL_0P),
+	dump_register(SSUSB_HW_ID),
+	dump_register(SSUSB_HW_SUB_ID),
+	dump_register(SSUSB_IP_SPARE0),
+};
+
+static const struct debugfs_reg32 mtu3_dev_regs[] = {
+	dump_register(LV1ISR),
+	dump_register(LV1IER),
+	dump_register(EPISR),
+	dump_register(EPIER),
+	dump_register(EP0CSR),
+	dump_register(RXCOUNT0),
+	dump_register(QISAR0),
+	dump_register(QIER0),
+	dump_register(QISAR1),
+	dump_register(QIER1),
+	dump_register(CAP_EPNTXFFSZ),
+	dump_register(CAP_EPNRXFFSZ),
+	dump_register(CAP_EPINFO),
+	dump_register(MISC_CTRL),
+};
+
+static const struct debugfs_reg32 mtu3_csr_regs[] = {
+	dump_register(DEVICE_CONF),
+	dump_register(DEV_LINK_INTR_ENABLE),
+	dump_register(DEV_LINK_INTR),
+	dump_register(LTSSM_CTRL),
+	dump_register(USB3_CONFIG),
+	dump_register(LINK_STATE_MACHINE),
+	dump_register(LTSSM_INTR_ENABLE),
+	dump_register(LTSSM_INTR),
+	dump_register(U3U2_SWITCH_CTRL),
+	dump_register(POWER_MANAGEMENT),
+	dump_register(DEVICE_CONTROL),
+	dump_register(COMMON_USB_INTR_ENABLE),
+	dump_register(COMMON_USB_INTR),
+	dump_register(USB20_MISC_CONTROL),
+	dump_register(USB20_OPSTATE),
+};
+
+static int mtu3_link_state_show(struct seq_file *sf, void *unused)
+{
+	struct mtu3 *mtu = sf->private;
+	void __iomem *mbase = mtu->mac_base;
+
+	seq_printf(sf, "opstate: %#x, ltssm: %#x\n",
+		   mtu3_readl(mbase, U3D_USB20_OPSTATE),
+		   LTSSM_STATE(mtu3_readl(mbase, U3D_LINK_STATE_MACHINE)));
+
+	return 0;
+}
+
+static int mtu3_ep_used_show(struct seq_file *sf, void *unused)
+{
+	struct mtu3 *mtu = sf->private;
+	struct mtu3_ep *mep;
+	unsigned long flags;
+	int used = 0;
+	int i;
+
+	spin_lock_irqsave(&mtu->lock, flags);
+
+	for (i = 0; i < mtu->num_eps; i++) {
+		mep = mtu->in_eps + i;
+		if (mep->flags & MTU3_EP_ENABLED) {
+			seq_printf(sf, "%s - type: %d\n", mep->name, mep->type);
+			used++;
+		}
+
+		mep = mtu->out_eps + i;
+		if (mep->flags & MTU3_EP_ENABLED) {
+			seq_printf(sf, "%s - type: %d\n", mep->name, mep->type);
+			used++;
+		}
+	}
+	seq_printf(sf, "total used: %d eps\n", used);
+
+	spin_unlock_irqrestore(&mtu->lock, flags);
+
+	return 0;
+}
+
+DEFINE_SHOW_ATTRIBUTE(mtu3_link_state);
+DEFINE_SHOW_ATTRIBUTE(mtu3_ep_used);
+
+static void mtu3_debugfs_regset(struct mtu3 *mtu, void __iomem *base,
+				const struct debugfs_reg32 *regs, size_t nregs,
+				const char *name, struct dentry *parent)
+{
+	struct debugfs_regset32 *regset;
+	struct mtu3_regset *mregs;
+
+	mregs = devm_kzalloc(mtu->dev, sizeof(*regset), GFP_KERNEL);
+	if (!mregs)
+		return;
+
+	sprintf(mregs->name, "%s", name);
+	regset = &mregs->regset;
+	regset->regs = regs;
+	regset->nregs = nregs;
+	regset->base = base;
+
+	debugfs_create_regset32(mregs->name, 0444, parent, regset);
+}
+
+static void mtu3_debugfs_ep_regset(struct mtu3 *mtu, struct mtu3_ep *mep,
+				   struct dentry *parent)
+{
+	struct debugfs_reg32 *regs;
+	int epnum = mep->epnum;
+	int in = mep->is_in;
+
+	regs = devm_kcalloc(mtu->dev, 7, sizeof(*regs), GFP_KERNEL);
+	if (!regs)
+		return;
+
+	regs[0].name = in ? "TCR0" : "RCR0";
+	regs[0].offset = in ? MU3D_EP_TXCR0(epnum) : MU3D_EP_RXCR0(epnum);
+	regs[1].name = in ? "TCR1" : "RCR1";
+	regs[1].offset = in ? MU3D_EP_TXCR1(epnum) : MU3D_EP_RXCR1(epnum);
+	regs[2].name = in ? "TCR2" : "RCR2";
+	regs[2].offset = in ? MU3D_EP_TXCR2(epnum) : MU3D_EP_RXCR2(epnum);
+	regs[3].name = in ? "TQHIAR" : "RQHIAR";
+	regs[3].offset = in ? USB_QMU_TQHIAR(epnum) : USB_QMU_RQHIAR(epnum);
+	regs[4].name = in ? "TQCSR" : "RQCSR";
+	regs[4].offset = in ? USB_QMU_TQCSR(epnum) : USB_QMU_RQCSR(epnum);
+	regs[5].name = in ? "TQSAR" : "RQSAR";
+	regs[5].offset = in ? USB_QMU_TQSAR(epnum) : USB_QMU_RQSAR(epnum);
+	regs[6].name = in ? "TQCPR" : "RQCPR";
+	regs[6].offset = in ? USB_QMU_TQCPR(epnum) : USB_QMU_RQCPR(epnum);
+
+	mtu3_debugfs_regset(mtu, mtu->mac_base, regs, 7, "ep-regs", parent);
+}
+
+static int mtu3_ep_info_show(struct seq_file *sf, void *unused)
+{
+	struct mtu3_ep *mep = sf->private;
+	struct mtu3 *mtu = mep->mtu;
+	unsigned long flags;
+
+	spin_lock_irqsave(&mtu->lock, flags);
+	seq_printf(sf, "ep - type:%d, maxp:%d, slot:%d, flags:%x\n",
+		   mep->type, mep->maxp, mep->slot, mep->flags);
+	spin_unlock_irqrestore(&mtu->lock, flags);
+
+	return 0;
+}
+
+static int mtu3_fifo_show(struct seq_file *sf, void *unused)
+{
+	struct mtu3_ep *mep = sf->private;
+	struct mtu3 *mtu = mep->mtu;
+	unsigned long flags;
+
+	spin_lock_irqsave(&mtu->lock, flags);
+	seq_printf(sf, "fifo - seg_size:%d, addr:%d, size:%d\n",
+		   mep->fifo_seg_size, mep->fifo_addr, mep->fifo_size);
+	spin_unlock_irqrestore(&mtu->lock, flags);
+
+	return 0;
+}
+
+static int mtu3_qmu_ring_show(struct seq_file *sf, void *unused)
+{
+	struct mtu3_ep *mep = sf->private;
+	struct mtu3 *mtu = mep->mtu;
+	struct mtu3_gpd_ring *ring;
+	unsigned long flags;
+
+	ring = &mep->gpd_ring;
+	spin_lock_irqsave(&mtu->lock, flags);
+	seq_printf(sf,
+		   "qmu-ring - dma:%pad, start:%p, end:%p, enq:%p, dep:%p\n",
+		   &ring->dma, ring->start, ring->end,
+		   ring->enqueue, ring->dequeue);
+	spin_unlock_irqrestore(&mtu->lock, flags);
+
+	return 0;
+}
+
+static int mtu3_qmu_gpd_show(struct seq_file *sf, void *unused)
+{
+	struct mtu3_ep *mep = sf->private;
+	struct mtu3 *mtu = mep->mtu;
+	struct mtu3_gpd_ring *ring;
+	struct qmu_gpd *gpd;
+	dma_addr_t dma;
+	unsigned long flags;
+	int i;
+
+	spin_lock_irqsave(&mtu->lock, flags);
+	ring = &mep->gpd_ring;
+	gpd = ring->start;
+	if (!gpd || !(mep->flags & MTU3_EP_ENABLED)) {
+		seq_puts(sf, "empty!\n");
+		goto out;
+	}
+
+	for (i = 0; i < MAX_GPD_NUM; i++, gpd++) {
+		dma = ring->dma + i * sizeof(*gpd);
+		seq_printf(sf, "gpd.%03d -> %pad, %p: %08x %08x %08x %08x\n",
+			   i, &dma, gpd, gpd->dw0_info, gpd->next_gpd,
+			   gpd->buffer, gpd->dw3_info);
+	}
+
+out:
+	spin_unlock_irqrestore(&mtu->lock, flags);
+
+	return 0;
+}
+
+static const struct mtu3_file_map mtu3_ep_files[] = {
+	{"ep-info", mtu3_ep_info_show, },
+	{"fifo", mtu3_fifo_show, },
+	{"qmu-ring", mtu3_qmu_ring_show, },
+	{"qmu-gpd", mtu3_qmu_gpd_show, },
+};
+
+static int mtu3_ep_open(struct inode *inode, struct file *file)
+{
+	const char *file_name = file_dentry(file)->d_iname;
+	const struct mtu3_file_map *f_map;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(mtu3_ep_files); i++) {
+		f_map = &mtu3_ep_files[i];
+
+		if (strcmp(f_map->name, file_name) == 0)
+			break;
+	}
+
+	return single_open(file, f_map->show, inode->i_private);
+}
+
+static const struct file_operations mtu3_ep_fops = {
+	.open = mtu3_ep_open,
+	.read = seq_read,
+	.llseek = seq_lseek,
+	.release = single_release,
+};
+
+static struct debugfs_reg32 mtu3_prb_regs[] = {
+	dump_prb_reg("enable", U3D_SSUSB_PRB_CTRL0),
+	dump_prb_reg("byte-sell", U3D_SSUSB_PRB_CTRL1),
+	dump_prb_reg("byte-selh", U3D_SSUSB_PRB_CTRL2),
+	dump_prb_reg("module-sel", U3D_SSUSB_PRB_CTRL3),
+	dump_prb_reg("sw-out", U3D_SSUSB_PRB_CTRL4),
+	dump_prb_reg("data", U3D_SSUSB_PRB_CTRL5),
+};
+
+static int mtu3_probe_show(struct seq_file *sf, void *unused)
+{
+	const char *file_name = file_dentry(sf->file)->d_iname;
+	struct mtu3 *mtu = sf->private;
+	const struct debugfs_reg32 *regs;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(mtu3_prb_regs); i++) {
+		regs = &mtu3_prb_regs[i];
+
+		if (strcmp(regs->name, file_name) == 0)
+			break;
+	}
+
+	seq_printf(sf, "0x%04x - 0x%08x\n", (u32)regs->offset,
+		   mtu3_readl(mtu->ippc_base, (u32)regs->offset));
+
+	return 0;
+}
+
+static int mtu3_probe_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, mtu3_probe_show, inode->i_private);
+}
+
+static ssize_t mtu3_probe_write(struct file *file, const char __user *ubuf,
+				size_t count, loff_t *ppos)
+{
+	const char *file_name = file_dentry(file)->d_iname;
+	struct seq_file *sf = file->private_data;
+	struct mtu3 *mtu = sf->private;
+	const struct debugfs_reg32 *regs;
+	char buf[32];
+	u32 val;
+	int i;
+
+	if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
+		return -EFAULT;
+
+	if (kstrtou32(buf, 0, &val))
+		return -EINVAL;
+
+	for (i = 0; i < ARRAY_SIZE(mtu3_prb_regs); i++) {
+		regs = &mtu3_prb_regs[i];
+
+		if (strcmp(regs->name, file_name) == 0)
+			break;
+	}
+	mtu3_writel(mtu->ippc_base, (u32)regs->offset, val);
+
+	return count;
+}
+
+static const struct file_operations mtu3_probe_fops = {
+	.open = mtu3_probe_open,
+	.write = mtu3_probe_write,
+	.read = seq_read,
+	.llseek = seq_lseek,
+	.release = single_release,
+};
+
+static void mtu3_debugfs_create_prb_files(struct mtu3 *mtu)
+{
+	struct ssusb_mtk *ssusb = mtu->ssusb;
+	struct debugfs_reg32 *regs;
+	struct dentry *dir_prb;
+	int i;
+
+	dir_prb = debugfs_create_dir("probe", ssusb->dbgfs_root);
+
+	for (i = 0; i < ARRAY_SIZE(mtu3_prb_regs); i++) {
+		regs = &mtu3_prb_regs[i];
+		debugfs_create_file(regs->name, 0644, dir_prb,
+				    mtu, &mtu3_probe_fops);
+	}
+
+	mtu3_debugfs_regset(mtu, mtu->ippc_base, mtu3_prb_regs,
+			    ARRAY_SIZE(mtu3_prb_regs), "regs", dir_prb);
+}
+
+static void mtu3_debugfs_create_ep_dir(struct mtu3_ep *mep,
+				       struct dentry *parent)
+{
+	const struct mtu3_file_map *files;
+	struct dentry *dir_ep;
+	int i;
+
+	dir_ep = debugfs_create_dir(mep->name, parent);
+	mtu3_debugfs_ep_regset(mep->mtu, mep, dir_ep);
+
+	for (i = 0; i < ARRAY_SIZE(mtu3_ep_files); i++) {
+		files = &mtu3_ep_files[i];
+
+		debugfs_create_file(files->name, 0444, dir_ep,
+				    mep, &mtu3_ep_fops);
+	}
+}
+
+static void mtu3_debugfs_create_ep_dirs(struct mtu3 *mtu)
+{
+	struct ssusb_mtk *ssusb = mtu->ssusb;
+	struct dentry *dir_eps;
+	int i;
+
+	dir_eps = debugfs_create_dir("eps", ssusb->dbgfs_root);
+
+	for (i = 1; i < mtu->num_eps; i++) {
+		mtu3_debugfs_create_ep_dir(mtu->in_eps + i, dir_eps);
+		mtu3_debugfs_create_ep_dir(mtu->out_eps + i, dir_eps);
+	}
+}
+
+void ssusb_dev_debugfs_init(struct ssusb_mtk *ssusb)
+{
+	struct mtu3 *mtu = ssusb->u3d;
+	struct dentry *dir_regs;
+
+	dir_regs = debugfs_create_dir("regs", ssusb->dbgfs_root);
+
+	mtu3_debugfs_regset(mtu, mtu->ippc_base,
+			    mtu3_ippc_regs, ARRAY_SIZE(mtu3_ippc_regs),
+			    "reg-ippc", dir_regs);
+
+	mtu3_debugfs_regset(mtu, mtu->mac_base,
+			    mtu3_dev_regs, ARRAY_SIZE(mtu3_dev_regs),
+			    "reg-dev", dir_regs);
+
+	mtu3_debugfs_regset(mtu, mtu->mac_base,
+			    mtu3_csr_regs, ARRAY_SIZE(mtu3_csr_regs),
+			    "reg-csr", dir_regs);
+
+	mtu3_debugfs_create_ep_dirs(mtu);
+
+	mtu3_debugfs_create_prb_files(mtu);
+
+	debugfs_create_file("link-state", 0444, ssusb->dbgfs_root,
+			    mtu, &mtu3_link_state_fops);
+	debugfs_create_file("ep-used", 0444, ssusb->dbgfs_root,
+			    mtu, &mtu3_ep_used_fops);
+}
+
+static int ssusb_mode_show(struct seq_file *sf, void *unused)
+{
+	struct ssusb_mtk *ssusb = sf->private;
+
+	seq_printf(sf, "current mode: %s(%s drd)\n(echo device/host)\n",
+		   ssusb->is_host ? "host" : "device",
+		   ssusb->otg_switch.manual_drd_enabled ? "manual" : "auto");
+
+	return 0;
+}
+
+static int ssusb_mode_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, ssusb_mode_show, inode->i_private);
+}
+
+static ssize_t ssusb_mode_write(struct file *file, const char __user *ubuf,
+				size_t count, loff_t *ppos)
+{
+	struct seq_file *sf = file->private_data;
+	struct ssusb_mtk *ssusb = sf->private;
+	char buf[16];
+
+	if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
+		return -EFAULT;
+
+	if (!strncmp(buf, "host", 4) && !ssusb->is_host) {
+		ssusb_mode_manual_switch(ssusb, 1);
+	} else if (!strncmp(buf, "device", 6) && ssusb->is_host) {
+		ssusb_mode_manual_switch(ssusb, 0);
+	} else {
+		dev_err(ssusb->dev, "wrong or duplicated setting\n");
+		return -EINVAL;
+	}
+
+	return count;
+}
+
+static const struct file_operations ssusb_mode_fops = {
+	.open = ssusb_mode_open,
+	.write = ssusb_mode_write,
+	.read = seq_read,
+	.llseek = seq_lseek,
+	.release = single_release,
+};
+
+static int ssusb_vbus_show(struct seq_file *sf, void *unused)
+{
+	struct ssusb_mtk *ssusb = sf->private;
+	struct otg_switch_mtk *otg_sx = &ssusb->otg_switch;
+
+	seq_printf(sf, "vbus state: %s\n(echo on/off)\n",
+		   regulator_is_enabled(otg_sx->vbus) ? "on" : "off");
+
+	return 0;
+}
+
+static int ssusb_vbus_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, ssusb_vbus_show, inode->i_private);
+}
+
+static ssize_t ssusb_vbus_write(struct file *file, const char __user *ubuf,
+				size_t count, loff_t *ppos)
+{
+	struct seq_file *sf = file->private_data;
+	struct ssusb_mtk *ssusb = sf->private;
+	struct otg_switch_mtk *otg_sx = &ssusb->otg_switch;
+	char buf[16];
+	bool enable;
+
+	if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
+		return -EFAULT;
+
+	if (kstrtobool(buf, &enable)) {
+		dev_err(ssusb->dev, "wrong setting\n");
+		return -EINVAL;
+	}
+
+	ssusb_set_vbus(otg_sx, enable);
+
+	return count;
+}
+
+static const struct file_operations ssusb_vbus_fops = {
+	.open = ssusb_vbus_open,
+	.write = ssusb_vbus_write,
+	.read = seq_read,
+	.llseek = seq_lseek,
+	.release = single_release,
+};
+
+void ssusb_dr_debugfs_init(struct ssusb_mtk *ssusb)
+{
+	struct dentry *root = ssusb->dbgfs_root;
+
+	debugfs_create_file("mode", 0644, root, ssusb, &ssusb_mode_fops);
+	debugfs_create_file("vbus", 0644, root, ssusb, &ssusb_vbus_fops);
+}
+
+void ssusb_debugfs_create_root(struct ssusb_mtk *ssusb)
+{
+	ssusb->dbgfs_root =
+		debugfs_create_dir(dev_name(ssusb->dev), usb_debug_root);
+}
+
+void ssusb_debugfs_remove_root(struct ssusb_mtk *ssusb)
+{
+	debugfs_remove_recursive(ssusb->dbgfs_root);
+	ssusb->dbgfs_root = NULL;
+}
diff --git a/drivers/usb/mtu3/mtu3_dr.c b/drivers/usb/mtu3/mtu3_dr.c
index ac60e9c8564e..5fcb71af875a 100644
--- a/drivers/usb/mtu3/mtu3_dr.c
+++ b/drivers/usb/mtu3/mtu3_dr.c
@@ -7,16 +7,9 @@
  * Author: Chunfeng Yun <chunfeng.yun@mediatek.com>
  */
 
-#include <linux/debugfs.h>
-#include <linux/irq.h>
-#include <linux/kernel.h>
-#include <linux/of_device.h>
-#include <linux/pinctrl/consumer.h>
-#include <linux/seq_file.h>
-#include <linux/uaccess.h>
-
 #include "mtu3.h"
 #include "mtu3_dr.h"
+#include "mtu3_debug.h"
 
 #define USB2_PORT 2
 #define USB3_PORT 3
@@ -28,6 +21,22 @@ enum mtu3_vbus_id_state {
 	MTU3_VBUS_VALID,
 };
 
+static char *mailbox_state_string(enum mtu3_vbus_id_state state)
+{
+	switch (state) {
+	case MTU3_ID_FLOAT:
+		return "ID_FLOAT";
+	case MTU3_ID_GROUND:
+		return "ID_GROUND";
+	case MTU3_VBUS_OFF:
+		return "VBUS_OFF";
+	case MTU3_VBUS_VALID:
+		return "VBUS_VALID";
+	default:
+		return "UNKNOWN";
+	}
+}
+
 static void toggle_opstate(struct ssusb_mtk *ssusb)
 {
 	if (!ssusb->otg_switch.is_u3_drd) {
@@ -147,7 +156,8 @@ static void ssusb_set_mailbox(struct otg_switch_mtk *otg_sx,
 		container_of(otg_sx, struct ssusb_mtk, otg_switch);
 	struct mtu3 *mtu = ssusb->u3d;
 
-	dev_dbg(ssusb->dev, "mailbox state(%d)\n", status);
+	dev_dbg(ssusb->dev, "mailbox %s\n", mailbox_state_string(status));
+	mtu3_dbg_trace(ssusb->dev, "mailbox %s", mailbox_state_string(status));
 
 	switch (status) {
 	case MTU3_ID_GROUND:
@@ -238,14 +248,18 @@ static int ssusb_extcon_register(struct otg_switch_mtk *otg_sx)
 	otg_sx->vbus_nb.notifier_call = ssusb_vbus_notifier;
 	ret = devm_extcon_register_notifier(ssusb->dev, edev, EXTCON_USB,
 					&otg_sx->vbus_nb);
-	if (ret < 0)
+	if (ret < 0) {
 		dev_err(ssusb->dev, "failed to register notifier for USB\n");
+		return ret;
+	}
 
 	otg_sx->id_nb.notifier_call = ssusb_id_notifier;
 	ret = devm_extcon_register_notifier(ssusb->dev, edev, EXTCON_USB_HOST,
 					&otg_sx->id_nb);
-	if (ret < 0)
+	if (ret < 0) {
 		dev_err(ssusb->dev, "failed to register notifier for USB-HOST\n");
+		return ret;
+	}
 
 	dev_dbg(ssusb->dev, "EXTCON_USB: %d, EXTCON_USB_HOST: %d\n",
 		extcon_get_state(edev, EXTCON_USB),
@@ -266,7 +280,7 @@ static int ssusb_extcon_register(struct otg_switch_mtk *otg_sx)
  * This is useful in special cases, such as uses TYPE-A receptacle but also
  * wants to support dual-role mode.
  */
-static void ssusb_mode_manual_switch(struct ssusb_mtk *ssusb, int to_host)
+void ssusb_mode_manual_switch(struct ssusb_mtk *ssusb, int to_host)
 {
 	struct otg_switch_mtk *otg_sx = &ssusb->otg_switch;
 
@@ -281,114 +295,6 @@ static void ssusb_mode_manual_switch(struct ssusb_mtk *ssusb, int to_host)
 	}
 }
 
-static int ssusb_mode_show(struct seq_file *sf, void *unused)
-{
-	struct ssusb_mtk *ssusb = sf->private;
-
-	seq_printf(sf, "current mode: %s(%s drd)\n(echo device/host)\n",
-		ssusb->is_host ? "host" : "device",
-		ssusb->otg_switch.manual_drd_enabled ? "manual" : "auto");
-
-	return 0;
-}
-
-static int ssusb_mode_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, ssusb_mode_show, inode->i_private);
-}
-
-static ssize_t ssusb_mode_write(struct file *file,
-	const char __user *ubuf, size_t count, loff_t *ppos)
-{
-	struct seq_file *sf = file->private_data;
-	struct ssusb_mtk *ssusb = sf->private;
-	char buf[16];
-
-	if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
-		return -EFAULT;
-
-	if (!strncmp(buf, "host", 4) && !ssusb->is_host) {
-		ssusb_mode_manual_switch(ssusb, 1);
-	} else if (!strncmp(buf, "device", 6) && ssusb->is_host) {
-		ssusb_mode_manual_switch(ssusb, 0);
-	} else {
-		dev_err(ssusb->dev, "wrong or duplicated setting\n");
-		return -EINVAL;
-	}
-
-	return count;
-}
-
-static const struct file_operations ssusb_mode_fops = {
-	.open = ssusb_mode_open,
-	.write = ssusb_mode_write,
-	.read = seq_read,
-	.llseek = seq_lseek,
-	.release = single_release,
-};
-
-static int ssusb_vbus_show(struct seq_file *sf, void *unused)
-{
-	struct ssusb_mtk *ssusb = sf->private;
-	struct otg_switch_mtk *otg_sx = &ssusb->otg_switch;
-
-	seq_printf(sf, "vbus state: %s\n(echo on/off)\n",
-		regulator_is_enabled(otg_sx->vbus) ? "on" : "off");
-
-	return 0;
-}
-
-static int ssusb_vbus_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, ssusb_vbus_show, inode->i_private);
-}
-
-static ssize_t ssusb_vbus_write(struct file *file,
-	const char __user *ubuf, size_t count, loff_t *ppos)
-{
-	struct seq_file *sf = file->private_data;
-	struct ssusb_mtk *ssusb = sf->private;
-	struct otg_switch_mtk *otg_sx = &ssusb->otg_switch;
-	char buf[16];
-	bool enable;
-
-	if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
-		return -EFAULT;
-
-	if (kstrtobool(buf, &enable)) {
-		dev_err(ssusb->dev, "wrong setting\n");
-		return -EINVAL;
-	}
-
-	ssusb_set_vbus(otg_sx, enable);
-
-	return count;
-}
-
-static const struct file_operations ssusb_vbus_fops = {
-	.open = ssusb_vbus_open,
-	.write = ssusb_vbus_write,
-	.read = seq_read,
-	.llseek = seq_lseek,
-	.release = single_release,
-};
-
-static void ssusb_debugfs_init(struct ssusb_mtk *ssusb)
-{
-	struct dentry *root;
-
-	root = debugfs_create_dir(dev_name(ssusb->dev), usb_debug_root);
-	ssusb->dbgfs_root = root;
-
-	debugfs_create_file("mode", 0644, root, ssusb, &ssusb_mode_fops);
-	debugfs_create_file("vbus", 0644, root, ssusb, &ssusb_vbus_fops);
-}
-
-static void ssusb_debugfs_exit(struct ssusb_mtk *ssusb)
-{
-	debugfs_remove_recursive(ssusb->dbgfs_root);
-}
-
 void ssusb_set_force_mode(struct ssusb_mtk *ssusb,
 			  enum mtu3_dr_force_mode mode)
 {
@@ -415,25 +321,23 @@ void ssusb_set_force_mode(struct ssusb_mtk *ssusb,
 int ssusb_otg_switch_init(struct ssusb_mtk *ssusb)
 {
 	struct otg_switch_mtk *otg_sx = &ssusb->otg_switch;
+	int ret = 0;
 
 	INIT_WORK(&otg_sx->id_work, ssusb_id_work);
 	INIT_WORK(&otg_sx->vbus_work, ssusb_vbus_work);
 
 	if (otg_sx->manual_drd_enabled)
-		ssusb_debugfs_init(ssusb);
+		ssusb_dr_debugfs_init(ssusb);
 	else
-		ssusb_extcon_register(otg_sx);
+		ret = ssusb_extcon_register(otg_sx);
 
-	return 0;
+	return ret;
 }
 
 void ssusb_otg_switch_exit(struct ssusb_mtk *ssusb)
 {
 	struct otg_switch_mtk *otg_sx = &ssusb->otg_switch;
 
-	if (otg_sx->manual_drd_enabled)
-		ssusb_debugfs_exit(ssusb);
-
 	cancel_work_sync(&otg_sx->id_work);
 	cancel_work_sync(&otg_sx->vbus_work);
 }
diff --git a/drivers/usb/mtu3/mtu3_dr.h b/drivers/usb/mtu3/mtu3_dr.h
index 50702fdcde28..ba6fe357ce29 100644
--- a/drivers/usb/mtu3/mtu3_dr.h
+++ b/drivers/usb/mtu3/mtu3_dr.h
@@ -71,6 +71,7 @@ static inline void ssusb_gadget_exit(struct ssusb_mtk *ssusb)
 #if IS_ENABLED(CONFIG_USB_MTU3_DUAL_ROLE)
 int ssusb_otg_switch_init(struct ssusb_mtk *ssusb);
 void ssusb_otg_switch_exit(struct ssusb_mtk *ssusb);
+void ssusb_mode_manual_switch(struct ssusb_mtk *ssusb, int to_host);
 int ssusb_set_vbus(struct otg_switch_mtk *otg_sx, int is_on);
 void ssusb_set_force_mode(struct ssusb_mtk *ssusb,
 			  enum mtu3_dr_force_mode mode);
@@ -85,6 +86,9 @@ static inline int ssusb_otg_switch_init(struct ssusb_mtk *ssusb)
 static inline void ssusb_otg_switch_exit(struct ssusb_mtk *ssusb)
 {}
 
+static inline void
+ssusb_mode_manual_switch(struct ssusb_mtk *ssusb, int to_host) {}
+
 static inline int ssusb_set_vbus(struct otg_switch_mtk *otg_sx, int is_on)
 {
 	return 0;
diff --git a/drivers/usb/mtu3/mtu3_gadget.c b/drivers/usb/mtu3/mtu3_gadget.c
index bbcd3332471d..f93732e53fd8 100644
--- a/drivers/usb/mtu3/mtu3_gadget.c
+++ b/drivers/usb/mtu3/mtu3_gadget.c
@@ -8,6 +8,7 @@
  */
 
 #include "mtu3.h"
+#include "mtu3_trace.h"
 
 void mtu3_req_complete(struct mtu3_ep *mep,
 		     struct usb_request *req, int status)
@@ -25,6 +26,8 @@ __acquires(mep->mtu->lock)
 
 	mtu = mreq->mtu;
 	mep->busy = 1;
+
+	trace_mtu3_req_complete(mreq);
 	spin_unlock(&mtu->lock);
 
 	/* ep0 makes use of PIO, needn't unmap it */
@@ -201,6 +204,7 @@ error:
 	spin_unlock_irqrestore(&mtu->lock, flags);
 
 	dev_dbg(mtu->dev, "%s active_ep=%d\n", __func__, mtu->active_ep);
+	trace_mtu3_gadget_ep_enable(mep);
 
 	return ret;
 }
@@ -212,6 +216,7 @@ static int mtu3_gadget_ep_disable(struct usb_ep *ep)
 	unsigned long flags;
 
 	dev_dbg(mtu->dev, "%s %s\n", __func__, mep->name);
+	trace_mtu3_gadget_ep_disable(mep);
 
 	if (!(mep->flags & MTU3_EP_ENABLED)) {
 		dev_warn(mtu->dev, "%s is already disabled\n", mep->name);
@@ -242,13 +247,17 @@ struct usb_request *mtu3_alloc_request(struct usb_ep *ep, gfp_t gfp_flags)
 	mreq->request.dma = DMA_ADDR_INVALID;
 	mreq->epnum = mep->epnum;
 	mreq->mep = mep;
+	trace_mtu3_alloc_request(mreq);
 
 	return &mreq->request;
 }
 
 void mtu3_free_request(struct usb_ep *ep, struct usb_request *req)
 {
-	kfree(to_mtu3_request(req));
+	struct mtu3_request *mreq = to_mtu3_request(req);
+
+	trace_mtu3_free_request(mreq);
+	kfree(mreq);
 }
 
 static int mtu3_gadget_queue(struct usb_ep *ep,
@@ -278,10 +287,12 @@ static int mtu3_gadget_queue(struct usb_ep *ep,
 		__func__, mep->is_in ? "TX" : "RX", mreq->epnum, ep->name,
 		mreq, ep->maxpacket, mreq->request.length);
 
-	if (req->length > GPD_BUF_SIZE) {
+	if (req->length > GPD_BUF_SIZE ||
+	    (mtu->gen2cp && req->length > GPD_BUF_SIZE_EL)) {
 		dev_warn(mtu->dev,
 			"req length > supported MAX:%d requested:%d\n",
-			GPD_BUF_SIZE, req->length);
+			mtu->gen2cp ? GPD_BUF_SIZE_EL : GPD_BUF_SIZE,
+			req->length);
 		return -EOPNOTSUPP;
 	}
 
@@ -314,6 +325,7 @@ static int mtu3_gadget_queue(struct usb_ep *ep,
 
 error:
 	spin_unlock_irqrestore(&mtu->lock, flags);
+	trace_mtu3_gadget_queue(mreq);
 
 	return ret;
 }
@@ -331,6 +343,7 @@ static int mtu3_gadget_dequeue(struct usb_ep *ep, struct usb_request *req)
 		return -EINVAL;
 
 	dev_dbg(mtu->dev, "%s : req=%p\n", __func__, req);
+	trace_mtu3_gadget_dequeue(mreq);
 
 	spin_lock_irqsave(&mtu->lock, flags);
 
@@ -401,6 +414,7 @@ static int mtu3_gadget_ep_set_halt(struct usb_ep *ep, int value)
 
 done:
 	spin_unlock_irqrestore(&mtu->lock, flags);
+	trace_mtu3_gadget_ep_set_halt(mep);
 
 	return ret;
 }
diff --git a/drivers/usb/mtu3/mtu3_gadget_ep0.c b/drivers/usb/mtu3/mtu3_gadget_ep0.c
index 7cb7ac980446..4da216c99726 100644
--- a/drivers/usb/mtu3/mtu3_gadget_ep0.c
+++ b/drivers/usb/mtu3/mtu3_gadget_ep0.c
@@ -11,6 +11,8 @@
 #include <linux/usb/composite.h>
 
 #include "mtu3.h"
+#include "mtu3_debug.h"
+#include "mtu3_trace.h"
 
 /* ep0 is always mtu3->in_eps[0] */
 #define	next_ep0_request(mtu)	next_request((mtu)->ep0)
@@ -634,6 +636,7 @@ __acquires(mtu->lock)
 	int handled = 0;
 
 	ep0_read_setup(mtu, &setup);
+	trace_mtu3_handle_setup(&setup);
 
 	if ((setup.bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD)
 		handled = handle_standard_request(mtu, &setup);
@@ -710,6 +713,7 @@ irqreturn_t mtu3_ep0_isr(struct mtu3 *mtu)
 		ret = IRQ_HANDLED;
 	}
 	dev_dbg(mtu->dev, "ep0_state: %s\n", decode_ep0_state(mtu));
+	mtu3_dbg_trace(mtu->dev, "ep0_state %s", decode_ep0_state(mtu));
 
 	switch (mtu->ep0_state) {
 	case MU3D_EP0_STATE_TX:
diff --git a/drivers/usb/mtu3/mtu3_hw_regs.h b/drivers/usb/mtu3/mtu3_hw_regs.h
index 1d65b7476f23..8382d066749e 100644
--- a/drivers/usb/mtu3/mtu3_hw_regs.h
+++ b/drivers/usb/mtu3/mtu3_hw_regs.h
@@ -49,6 +49,7 @@
 #define U3D_QCR1		(SSUSB_DEV_BASE + 0x0404)
 #define U3D_QCR2		(SSUSB_DEV_BASE + 0x0408)
 #define U3D_QCR3		(SSUSB_DEV_BASE + 0x040C)
+#define U3D_QFCR		(SSUSB_DEV_BASE + 0x0428)
 #define U3D_TXQHIAR1		(SSUSB_DEV_BASE + 0x0484)
 #define U3D_RXQHIAR1		(SSUSB_DEV_BASE + 0x04C4)
 
@@ -133,11 +134,23 @@
 #define TX_W1C_BITS		(~(TX_SENTSTALL))
 
 /* U3D_TX1CSR1 */
-#define TX_MULT(x)		(((x) & 0x3) << 22)
-#define TX_MAX_PKT(x)		(((x) & 0x3f) << 16)
+#define TX_MAX_PKT_G2(x)	(((x) & 0x7f) << 24)
+#define TX_MULT_G2(x)		(((x) & 0x7) << 21)
+#define TX_MULT_OG(x)		(((x) & 0x3) << 22)
+#define TX_MAX_PKT_OG(x)	(((x) & 0x3f) << 16)
 #define TX_SLOT(x)		(((x) & 0x3f) << 8)
 #define TX_TYPE(x)		(((x) & 0x3) << 4)
 #define TX_SS_BURST(x)		(((x) & 0xf) << 0)
+#define TX_MULT(g2c, x)		\
+({				\
+	typeof(x) x_ = (x);	\
+	(g2c) ? TX_MULT_G2(x_) : TX_MULT_OG(x_);	\
+})
+#define TX_MAX_PKT(g2c, x)	\
+({				\
+	typeof(x) x_ = (x);	\
+	(g2c) ? TX_MAX_PKT_G2(x_) : TX_MAX_PKT_OG(x_);	\
+})
 
 /* for TX_TYPE & RX_TYPE */
 #define TYPE_BULK		(0x0)
@@ -160,11 +173,23 @@
 #define RX_W1C_BITS		(~(RX_SENTSTALL | RX_RXPKTRDY))
 
 /* U3D_RX1CSR1 */
-#define RX_MULT(x)		(((x) & 0x3) << 22)
-#define RX_MAX_PKT(x)		(((x) & 0x3f) << 16)
+#define RX_MAX_PKT_G2(x)	(((x) & 0x7f) << 24)
+#define RX_MULT_G2(x)		(((x) & 0x7) << 21)
+#define RX_MULT_OG(x)		(((x) & 0x3) << 22)
+#define RX_MAX_PKT_OG(x)	(((x) & 0x3f) << 16)
 #define RX_SLOT(x)		(((x) & 0x3f) << 8)
 #define RX_TYPE(x)		(((x) & 0x3) << 4)
 #define RX_SS_BURST(x)		(((x) & 0xf) << 0)
+#define RX_MULT(g2c, x)		\
+({				\
+	typeof(x) x_ = (x);	\
+	(g2c) ? RX_MULT_G2(x_) : RX_MULT_OG(x_);	\
+})
+#define RX_MAX_PKT(g2c, x)	\
+({				\
+	typeof(x) x_ = (x);	\
+	(g2c) ? RX_MAX_PKT_G2(x_) : RX_MAX_PKT_OG(x_);	\
+})
 
 /* U3D_RX1CSR2 */
 #define RX_BINTERVAL(x)		(((x) & 0xff) << 24)
@@ -265,6 +290,7 @@
 #define U3D_LTSSM_CTRL		(SSUSB_USB3_MAC_CSR_BASE + 0x0010)
 #define U3D_USB3_CONFIG		(SSUSB_USB3_MAC_CSR_BASE + 0x001C)
 
+#define U3D_LINK_STATE_MACHINE	(SSUSB_USB3_MAC_CSR_BASE + 0x0134)
 #define U3D_LTSSM_INTR_ENABLE	(SSUSB_USB3_MAC_CSR_BASE + 0x013C)
 #define U3D_LTSSM_INTR		(SSUSB_USB3_MAC_CSR_BASE + 0x0140)
 
@@ -282,6 +308,9 @@
 /* U3D_USB3_CONFIG */
 #define USB3_EN			BIT(0)
 
+/* U3D_LINK_STATE_MACHINE */
+#define LTSSM_STATE(x)	((x) & 0x1f)
+
 /* U3D_LTSSM_INTR_ENABLE */
 /* U3D_LTSSM_INTR */
 #define U3_RESUME_INTR		BIT(18)
@@ -347,6 +376,7 @@
 #define U3D_USB20_FRAME_NUM		(SSUSB_USB2_CSR_BASE + 0x003C)
 #define U3D_USB20_LPM_PARAMETER		(SSUSB_USB2_CSR_BASE + 0x0044)
 #define U3D_USB20_MISC_CONTROL		(SSUSB_USB2_CSR_BASE + 0x004C)
+#define U3D_USB20_OPSTATE		(SSUSB_USB2_CSR_BASE + 0x0060)
 
 /*---------------- SSUSB_USB2_CSR FIELD DEFINITION ----------------*/
 
@@ -419,6 +449,13 @@
 #define U3D_SSUSB_DEV_RST_CTRL	(SSUSB_SIFSLV_IPPC_BASE + 0x0098)
 #define U3D_SSUSB_HW_ID		(SSUSB_SIFSLV_IPPC_BASE + 0x00A0)
 #define U3D_SSUSB_HW_SUB_ID	(SSUSB_SIFSLV_IPPC_BASE + 0x00A4)
+#define U3D_SSUSB_IP_TRUNK_VERS	(U3D_SSUSB_HW_SUB_ID)
+#define U3D_SSUSB_PRB_CTRL0	(SSUSB_SIFSLV_IPPC_BASE + 0x00B0)
+#define U3D_SSUSB_PRB_CTRL1	(SSUSB_SIFSLV_IPPC_BASE + 0x00B4)
+#define U3D_SSUSB_PRB_CTRL2	(SSUSB_SIFSLV_IPPC_BASE + 0x00B8)
+#define U3D_SSUSB_PRB_CTRL3	(SSUSB_SIFSLV_IPPC_BASE + 0x00BC)
+#define U3D_SSUSB_PRB_CTRL4	(SSUSB_SIFSLV_IPPC_BASE + 0x00C0)
+#define U3D_SSUSB_PRB_CTRL5	(SSUSB_SIFSLV_IPPC_BASE + 0x00C4)
 #define U3D_SSUSB_IP_SPARE0	(SSUSB_SIFSLV_IPPC_BASE + 0x00C8)
 
 /*---------------- SSUSB_SIFSLV_IPPC FIELD DEFINITION ----------------*/
@@ -483,4 +520,7 @@
 /* U3D_SSUSB_DEV_RST_CTRL */
 #define SSUSB_DEV_SW_RST		BIT(0)
 
+/* U3D_SSUSB_IP_TRUNK_VERS */
+#define IP_TRUNK_VERS(x)		(((x) >> 16) & 0xffff)
+
 #endif	/* _SSUSB_HW_REGS_H_ */
diff --git a/drivers/usb/mtu3/mtu3_plat.c b/drivers/usb/mtu3/mtu3_plat.c
index e086630e41a9..fd0f6c5dfbc1 100644
--- a/drivers/usb/mtu3/mtu3_plat.c
+++ b/drivers/usb/mtu3/mtu3_plat.c
@@ -16,6 +16,7 @@
 
 #include "mtu3.h"
 #include "mtu3_dr.h"
+#include "mtu3_debug.h"
 
 /* u2-port0 should be powered on and enabled; */
 int ssusb_check_clocks(struct ssusb_mtk *ssusb, u32 ex_clks)
@@ -210,30 +211,16 @@ static void ssusb_ip_sw_reset(struct ssusb_mtk *ssusb)
 	mtu3_setbits(ssusb->ippc_base, U3D_SSUSB_IP_PW_CTRL2, SSUSB_IP_DEV_PDN);
 }
 
-/* ignore the error if the clock does not exist */
-static struct clk *get_optional_clk(struct device *dev, const char *id)
-{
-	struct clk *opt_clk;
-
-	opt_clk = devm_clk_get(dev, id);
-	/* ignore error number except EPROBE_DEFER */
-	if (IS_ERR(opt_clk) && (PTR_ERR(opt_clk) != -EPROBE_DEFER))
-		opt_clk = NULL;
-
-	return opt_clk;
-}
-
 static int get_ssusb_rscs(struct platform_device *pdev, struct ssusb_mtk *ssusb)
 {
 	struct device_node *node = pdev->dev.of_node;
 	struct otg_switch_mtk *otg_sx = &ssusb->otg_switch;
 	struct device *dev = &pdev->dev;
-	struct regulator *vbus;
 	struct resource *res;
 	int i;
 	int ret;
 
-	ssusb->vusb33 = devm_regulator_get(&pdev->dev, "vusb33");
+	ssusb->vusb33 = devm_regulator_get(dev, "vusb33");
 	if (IS_ERR(ssusb->vusb33)) {
 		dev_err(dev, "failed to get vusb33\n");
 		return PTR_ERR(ssusb->vusb33);
@@ -245,15 +232,15 @@ static int get_ssusb_rscs(struct platform_device *pdev, struct ssusb_mtk *ssusb)
 		return PTR_ERR(ssusb->sys_clk);
 	}
 
-	ssusb->ref_clk = get_optional_clk(dev, "ref_ck");
+	ssusb->ref_clk = devm_clk_get_optional(dev, "ref_ck");
 	if (IS_ERR(ssusb->ref_clk))
 		return PTR_ERR(ssusb->ref_clk);
 
-	ssusb->mcu_clk = get_optional_clk(dev, "mcu_ck");
+	ssusb->mcu_clk = devm_clk_get_optional(dev, "mcu_ck");
 	if (IS_ERR(ssusb->mcu_clk))
 		return PTR_ERR(ssusb->mcu_clk);
 
-	ssusb->dma_clk = get_optional_clk(dev, "dma_ck");
+	ssusb->dma_clk = devm_clk_get_optional(dev, "dma_ck");
 	if (IS_ERR(ssusb->dma_clk))
 		return PTR_ERR(ssusb->dma_clk);
 
@@ -286,7 +273,7 @@ static int get_ssusb_rscs(struct platform_device *pdev, struct ssusb_mtk *ssusb)
 		ssusb->dr_mode = USB_DR_MODE_OTG;
 
 	if (ssusb->dr_mode == USB_DR_MODE_PERIPHERAL)
-		return 0;
+		goto out;
 
 	/* if host role is supported */
 	ret = ssusb_wakeup_of_property_parse(ssusb, node);
@@ -299,15 +286,14 @@ static int get_ssusb_rscs(struct platform_device *pdev, struct ssusb_mtk *ssusb)
 	of_property_read_u32(node, "mediatek,u3p-dis-msk",
 			     &ssusb->u3p_dis_msk);
 
-	vbus = devm_regulator_get(&pdev->dev, "vbus");
-	if (IS_ERR(vbus)) {
+	otg_sx->vbus = devm_regulator_get(dev, "vbus");
+	if (IS_ERR(otg_sx->vbus)) {
 		dev_err(dev, "failed to get vbus\n");
-		return PTR_ERR(vbus);
+		return PTR_ERR(otg_sx->vbus);
 	}
-	otg_sx->vbus = vbus;
 
 	if (ssusb->dr_mode == USB_DR_MODE_HOST)
-		return 0;
+		goto out;
 
 	/* if dual-role mode is supported */
 	otg_sx->is_u3_drd = of_property_read_bool(node, "mediatek,usb3-drd");
@@ -322,6 +308,7 @@ static int get_ssusb_rscs(struct platform_device *pdev, struct ssusb_mtk *ssusb)
 		}
 	}
 
+out:
 	dev_info(dev, "dr_mode: %d, is_u3_dr: %d, u3p_dis_msk: %x, drd: %s\n",
 		ssusb->dr_mode, otg_sx->is_u3_drd, ssusb->u3p_dis_msk,
 		otg_sx->manual_drd_enabled ? "manual" : "auto");
@@ -354,6 +341,8 @@ static int mtu3_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
+	ssusb_debugfs_create_root(ssusb);
+
 	/* enable power domain */
 	pm_runtime_enable(dev);
 	pm_runtime_get_sync(dev);
@@ -401,7 +390,11 @@ static int mtu3_probe(struct platform_device *pdev)
 			goto gadget_exit;
 		}
 
-		ssusb_otg_switch_init(ssusb);
+		ret = ssusb_otg_switch_init(ssusb);
+		if (ret) {
+			dev_err(dev, "failed to initialize switch\n");
+			goto host_exit;
+		}
 		break;
 	default:
 		dev_err(dev, "unsupported mode: %d\n", ssusb->dr_mode);
@@ -411,6 +404,8 @@ static int mtu3_probe(struct platform_device *pdev)
 
 	return 0;
 
+host_exit:
+	ssusb_host_exit(ssusb);
 gadget_exit:
 	ssusb_gadget_exit(ssusb);
 comm_exit:
@@ -418,6 +413,7 @@ comm_exit:
 comm_init_err:
 	pm_runtime_put_sync(dev);
 	pm_runtime_disable(dev);
+	ssusb_debugfs_remove_root(ssusb);
 
 	return ret;
 }
@@ -445,6 +441,7 @@ static int mtu3_remove(struct platform_device *pdev)
 	ssusb_rscs_exit(ssusb);
 	pm_runtime_put_sync(&pdev->dev);
 	pm_runtime_disable(&pdev->dev);
+	ssusb_debugfs_remove_root(ssusb);
 
 	return 0;
 }
diff --git a/drivers/usb/mtu3/mtu3_qmu.c b/drivers/usb/mtu3/mtu3_qmu.c
index 09f19f70fe8f..3f414f91b589 100644
--- a/drivers/usb/mtu3/mtu3_qmu.c
+++ b/drivers/usb/mtu3/mtu3_qmu.c
@@ -22,17 +22,49 @@
 #include <linux/iopoll.h>
 
 #include "mtu3.h"
+#include "mtu3_trace.h"
 
 #define QMU_CHECKSUM_LEN	16
 
 #define GPD_FLAGS_HWO	BIT(0)
 #define GPD_FLAGS_BDP	BIT(1)
 #define GPD_FLAGS_BPS	BIT(2)
+#define GPD_FLAGS_ZLP	BIT(6)
 #define GPD_FLAGS_IOC	BIT(7)
-
-#define GPD_EXT_FLAG_ZLP	BIT(5)
-#define GPD_EXT_NGP(x)		(((x) & 0xf) << 4)
-#define GPD_EXT_BUF(x)		(((x) & 0xf) << 0)
+#define GET_GPD_HWO(gpd)	(le32_to_cpu((gpd)->dw0_info) & GPD_FLAGS_HWO)
+
+#define GPD_RX_BUF_LEN_OG(x)	(((x) & 0xffff) << 16)
+#define GPD_RX_BUF_LEN_EL(x)	(((x) & 0xfffff) << 12)
+#define GPD_RX_BUF_LEN(mtu, x)	\
+({				\
+	typeof(x) x_ = (x);	\
+	((mtu)->gen2cp) ? GPD_RX_BUF_LEN_EL(x_) : GPD_RX_BUF_LEN_OG(x_); \
+})
+
+#define GPD_DATA_LEN_OG(x)	((x) & 0xffff)
+#define GPD_DATA_LEN_EL(x)	((x) & 0xfffff)
+#define GPD_DATA_LEN(mtu, x)	\
+({				\
+	typeof(x) x_ = (x);	\
+	((mtu)->gen2cp) ? GPD_DATA_LEN_EL(x_) : GPD_DATA_LEN_OG(x_); \
+})
+
+#define GPD_EXT_FLAG_ZLP	BIT(29)
+#define GPD_EXT_NGP_OG(x)	(((x) & 0xf) << 20)
+#define GPD_EXT_BUF_OG(x)	(((x) & 0xf) << 16)
+#define GPD_EXT_NGP_EL(x)	(((x) & 0xf) << 28)
+#define GPD_EXT_BUF_EL(x)	(((x) & 0xf) << 24)
+#define GPD_EXT_NGP(mtu, x)	\
+({				\
+	typeof(x) x_ = (x);	\
+	((mtu)->gen2cp) ? GPD_EXT_NGP_EL(x_) : GPD_EXT_NGP_OG(x_); \
+})
+
+#define GPD_EXT_BUF(mtu, x)	\
+({				\
+	typeof(x) x_ = (x);	\
+	((mtu)->gen2cp) ? GPD_EXT_BUF_EL(x_) : GPD_EXT_BUF_OG(x_); \
+})
 
 #define HILO_GEN64(hi, lo) (((u64)(hi) << 32) + (lo))
 #define HILO_DMA(hi, lo)	\
@@ -125,7 +157,7 @@ static void reset_gpd_list(struct mtu3_ep *mep)
 	struct qmu_gpd *gpd = ring->start;
 
 	if (gpd) {
-		gpd->flag &= ~GPD_FLAGS_HWO;
+		gpd->dw0_info &= cpu_to_le32(~GPD_FLAGS_HWO);
 		gpd_ring_init(ring, gpd);
 	}
 }
@@ -214,16 +246,14 @@ static int mtu3_prepare_tx_gpd(struct mtu3_ep *mep, struct mtu3_request *mreq)
 	struct mtu3_gpd_ring *ring = &mep->gpd_ring;
 	struct qmu_gpd *gpd = ring->enqueue;
 	struct usb_request *req = &mreq->request;
+	struct mtu3 *mtu = mep->mtu;
 	dma_addr_t enq_dma;
-	u16 ext_addr;
-
-	/* set all fields to zero as default value */
-	memset(gpd, 0, sizeof(*gpd));
+	u32 ext_addr;
 
+	gpd->dw0_info = 0;	/* SW own it */
 	gpd->buffer = cpu_to_le32(lower_32_bits(req->dma));
-	ext_addr = GPD_EXT_BUF(upper_32_bits(req->dma));
-	gpd->buf_len = cpu_to_le16(req->length);
-	gpd->flag |= GPD_FLAGS_IOC;
+	ext_addr = GPD_EXT_BUF(mtu, upper_32_bits(req->dma));
+	gpd->dw3_info = cpu_to_le32(GPD_DATA_LEN(mtu, req->length));
 
 	/* get the next GPD */
 	enq = advance_enq_gpd(ring);
@@ -231,17 +261,22 @@ static int mtu3_prepare_tx_gpd(struct mtu3_ep *mep, struct mtu3_request *mreq)
 	dev_dbg(mep->mtu->dev, "TX-EP%d queue gpd=%p, enq=%p, qdma=%pad\n",
 		mep->epnum, gpd, enq, &enq_dma);
 
-	enq->flag &= ~GPD_FLAGS_HWO;
+	enq->dw0_info &= cpu_to_le32(~GPD_FLAGS_HWO);
 	gpd->next_gpd = cpu_to_le32(lower_32_bits(enq_dma));
-	ext_addr |= GPD_EXT_NGP(upper_32_bits(enq_dma));
-	gpd->tx_ext_addr = cpu_to_le16(ext_addr);
-
-	if (req->zero)
-		gpd->ext_flag |= GPD_EXT_FLAG_ZLP;
+	ext_addr |= GPD_EXT_NGP(mtu, upper_32_bits(enq_dma));
+	gpd->dw0_info = cpu_to_le32(ext_addr);
+
+	if (req->zero) {
+		if (mtu->gen2cp)
+			gpd->dw0_info |= cpu_to_le32(GPD_FLAGS_ZLP);
+		else
+			gpd->dw3_info |= cpu_to_le32(GPD_EXT_FLAG_ZLP);
+	}
 
-	gpd->flag |= GPD_FLAGS_HWO;
+	gpd->dw0_info |= cpu_to_le32(GPD_FLAGS_IOC | GPD_FLAGS_HWO);
 
 	mreq->gpd = gpd;
+	trace_mtu3_prepare_gpd(mep, gpd);
 
 	return 0;
 }
@@ -252,16 +287,14 @@ static int mtu3_prepare_rx_gpd(struct mtu3_ep *mep, struct mtu3_request *mreq)
 	struct mtu3_gpd_ring *ring = &mep->gpd_ring;
 	struct qmu_gpd *gpd = ring->enqueue;
 	struct usb_request *req = &mreq->request;
+	struct mtu3 *mtu = mep->mtu;
 	dma_addr_t enq_dma;
-	u16 ext_addr;
-
-	/* set all fields to zero as default value */
-	memset(gpd, 0, sizeof(*gpd));
+	u32 ext_addr;
 
+	gpd->dw0_info = 0;	/* SW own it */
 	gpd->buffer = cpu_to_le32(lower_32_bits(req->dma));
-	ext_addr = GPD_EXT_BUF(upper_32_bits(req->dma));
-	gpd->data_buf_len = cpu_to_le16(req->length);
-	gpd->flag |= GPD_FLAGS_IOC;
+	ext_addr = GPD_EXT_BUF(mtu, upper_32_bits(req->dma));
+	gpd->dw0_info = cpu_to_le32(GPD_RX_BUF_LEN(mtu, req->length));
 
 	/* get the next GPD */
 	enq = advance_enq_gpd(ring);
@@ -269,13 +302,14 @@ static int mtu3_prepare_rx_gpd(struct mtu3_ep *mep, struct mtu3_request *mreq)
 	dev_dbg(mep->mtu->dev, "RX-EP%d queue gpd=%p, enq=%p, qdma=%pad\n",
 		mep->epnum, gpd, enq, &enq_dma);
 
-	enq->flag &= ~GPD_FLAGS_HWO;
+	enq->dw0_info &= cpu_to_le32(~GPD_FLAGS_HWO);
 	gpd->next_gpd = cpu_to_le32(lower_32_bits(enq_dma));
-	ext_addr |= GPD_EXT_NGP(upper_32_bits(enq_dma));
-	gpd->rx_ext_addr = cpu_to_le16(ext_addr);
-	gpd->flag |= GPD_FLAGS_HWO;
+	ext_addr |= GPD_EXT_NGP(mtu, upper_32_bits(enq_dma));
+	gpd->dw3_info = cpu_to_le32(ext_addr);
+	gpd->dw0_info |= cpu_to_le32(GPD_FLAGS_IOC | GPD_FLAGS_HWO);
 
 	mreq->gpd = gpd;
+	trace_mtu3_prepare_gpd(mep, gpd);
 
 	return 0;
 }
@@ -382,27 +416,25 @@ static void qmu_tx_zlp_error_handler(struct mtu3 *mtu, u8 epnum)
 	struct mtu3_gpd_ring *ring = &mep->gpd_ring;
 	void __iomem *mbase = mtu->mac_base;
 	struct qmu_gpd *gpd_current = NULL;
-	struct usb_request *req = NULL;
 	struct mtu3_request *mreq;
 	dma_addr_t cur_gpd_dma;
 	u32 txcsr = 0;
 	int ret;
 
 	mreq = next_request(mep);
-	if (mreq && mreq->request.length == 0)
-		req = &mreq->request;
-	else
+	if (mreq && mreq->request.length != 0)
 		return;
 
 	cur_gpd_dma = read_txq_cur_addr(mbase, epnum);
 	gpd_current = gpd_dma_to_virt(ring, cur_gpd_dma);
 
-	if (le16_to_cpu(gpd_current->buf_len) != 0) {
+	if (GPD_DATA_LEN(mtu, le32_to_cpu(gpd_current->dw3_info)) != 0) {
 		dev_err(mtu->dev, "TX EP%d buffer length error(!=0)\n", epnum);
 		return;
 	}
 
-	dev_dbg(mtu->dev, "%s send ZLP for req=%p\n", __func__, req);
+	dev_dbg(mtu->dev, "%s send ZLP for req=%p\n", __func__, mreq);
+	trace_mtu3_zlp_exp_gpd(mep, gpd_current);
 
 	mtu3_clrbits(mbase, MU3D_EP_TXCR0(mep->epnum), TX_DMAREQEN);
 
@@ -415,8 +447,7 @@ static void qmu_tx_zlp_error_handler(struct mtu3 *mtu, u8 epnum)
 	mtu3_setbits(mbase, MU3D_EP_TXCR0(mep->epnum), TX_TXPKTRDY);
 
 	/* by pass the current GDP */
-	gpd_current->flag |= GPD_FLAGS_BPS;
-	gpd_current->flag |= GPD_FLAGS_HWO;
+	gpd_current->dw0_info |= cpu_to_le32(GPD_FLAGS_BPS | GPD_FLAGS_HWO);
 
 	/*enable DMAREQEN, switch back to QMU mode */
 	mtu3_setbits(mbase, MU3D_EP_TXCR0(mep->epnum), TX_DMAREQEN);
@@ -448,7 +479,7 @@ static void qmu_done_tx(struct mtu3 *mtu, u8 epnum)
 	dev_dbg(mtu->dev, "%s EP%d, last=%p, current=%p, enq=%p\n",
 		__func__, epnum, gpd, gpd_current, ring->enqueue);
 
-	while (gpd != gpd_current && !(gpd->flag & GPD_FLAGS_HWO)) {
+	while (gpd != gpd_current && !GET_GPD_HWO(gpd)) {
 
 		mreq = next_request(mep);
 
@@ -458,7 +489,8 @@ static void qmu_done_tx(struct mtu3 *mtu, u8 epnum)
 		}
 
 		request = &mreq->request;
-		request->actual = le16_to_cpu(gpd->buf_len);
+		request->actual = GPD_DATA_LEN(mtu, le32_to_cpu(gpd->dw3_info));
+		trace_mtu3_complete_gpd(mep, gpd);
 		mtu3_req_complete(mep, request, 0);
 
 		gpd = advance_deq_gpd(ring);
@@ -486,7 +518,7 @@ static void qmu_done_rx(struct mtu3 *mtu, u8 epnum)
 	dev_dbg(mtu->dev, "%s EP%d, last=%p, current=%p, enq=%p\n",
 		__func__, epnum, gpd, gpd_current, ring->enqueue);
 
-	while (gpd != gpd_current && !(gpd->flag & GPD_FLAGS_HWO)) {
+	while (gpd != gpd_current && !GET_GPD_HWO(gpd)) {
 
 		mreq = next_request(mep);
 
@@ -496,7 +528,8 @@ static void qmu_done_rx(struct mtu3 *mtu, u8 epnum)
 		}
 		req = &mreq->request;
 
-		req->actual = le16_to_cpu(gpd->buf_len);
+		req->actual = GPD_DATA_LEN(mtu, le32_to_cpu(gpd->dw3_info));
+		trace_mtu3_complete_gpd(mep, gpd);
 		mtu3_req_complete(mep, req, 0);
 
 		gpd = advance_deq_gpd(ring);
@@ -574,6 +607,7 @@ irqreturn_t mtu3_qmu_isr(struct mtu3 *mtu)
 	dev_dbg(mtu->dev, "=== QMUdone[tx=%x, rx=%x] QMUexp[%x] ===\n",
 		(qmu_done_status & 0xFFFF), qmu_done_status >> 16,
 		qmu_status);
+	trace_mtu3_qmu_isr(qmu_done_status, qmu_status);
 
 	if (qmu_done_status)
 		qmu_done_isr(mtu, qmu_done_status);
diff --git a/drivers/usb/mtu3/mtu3_qmu.h b/drivers/usb/mtu3/mtu3_qmu.h
index 81f5151a55ed..9cfde201db63 100644
--- a/drivers/usb/mtu3/mtu3_qmu.h
+++ b/drivers/usb/mtu3/mtu3_qmu.h
@@ -15,6 +15,7 @@
 #define QMU_GPD_RING_SIZE	(MAX_GPD_NUM * QMU_GPD_SIZE)
 
 #define GPD_BUF_SIZE		65532
+#define GPD_BUF_SIZE_EL		1048572
 
 void mtu3_qmu_stop(struct mtu3_ep *mep);
 int mtu3_qmu_start(struct mtu3_ep *mep);
diff --git a/drivers/usb/mtu3/mtu3_trace.c b/drivers/usb/mtu3/mtu3_trace.c
new file mode 100644
index 000000000000..4f5e7857ec31
--- /dev/null
+++ b/drivers/usb/mtu3/mtu3_trace.c
@@ -0,0 +1,23 @@
+// SPDX-License-Identifier: GPL-2.0
+/**
+ * mtu3_trace.c - trace support
+ *
+ * Copyright (C) 2019 MediaTek Inc.
+ *
+ * Author: Chunfeng Yun <chunfeng.yun@mediatek.com>
+ */
+
+#define CREATE_TRACE_POINTS
+#include "mtu3_trace.h"
+
+void mtu3_dbg_trace(struct device *dev, const char *fmt, ...)
+{
+	struct va_format vaf;
+	va_list args;
+
+	va_start(args, fmt);
+	vaf.fmt = fmt;
+	vaf.va = &args;
+	trace_mtu3_log(dev, &vaf);
+	va_end(args);
+}
diff --git a/drivers/usb/mtu3/mtu3_trace.h b/drivers/usb/mtu3/mtu3_trace.h
new file mode 100644
index 000000000000..050e30f0fbd4
--- /dev/null
+++ b/drivers/usb/mtu3/mtu3_trace.h
@@ -0,0 +1,279 @@
+// SPDX-License-Identifier: GPL-2.0
+/**
+ * mtu3_trace.h - trace support
+ *
+ * Copyright (C) 2019 MediaTek Inc.
+ *
+ * Author: Chunfeng Yun <chunfeng.yun@mediatek.com>
+ */
+
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM mtu3
+
+#if !defined(__MTU3_TRACE_H__) || defined(TRACE_HEADER_MULTI_READ)
+#define __MTU3_TRACE_H__
+
+#include <linux/types.h>
+#include <linux/tracepoint.h>
+
+#include "mtu3.h"
+
+#define MTU3_MSG_MAX	256
+
+TRACE_EVENT(mtu3_log,
+	TP_PROTO(struct device *dev, struct va_format *vaf),
+	TP_ARGS(dev, vaf),
+	TP_STRUCT__entry(
+		__string(name, dev_name(dev))
+		__dynamic_array(char, msg, MTU3_MSG_MAX)
+	),
+	TP_fast_assign(
+		__assign_str(name, dev_name(dev));
+		vsnprintf(__get_str(msg), MTU3_MSG_MAX, vaf->fmt, *vaf->va);
+	),
+	TP_printk("%s: %s", __get_str(name), __get_str(msg))
+);
+
+TRACE_EVENT(mtu3_u3_ltssm_isr,
+	TP_PROTO(u32 intr),
+	TP_ARGS(intr),
+	TP_STRUCT__entry(
+		__field(u32, intr)
+	),
+	TP_fast_assign(
+		__entry->intr = intr;
+	),
+	TP_printk("(%08x) %s %s %s %s %s %s", __entry->intr,
+		__entry->intr & HOT_RST_INTR ? "HOT_RST" : "",
+		__entry->intr & WARM_RST_INTR ? "WARM_RST" : "",
+		__entry->intr & ENTER_U3_INTR ? "ENT_U3" : "",
+		__entry->intr & EXIT_U3_INTR ? "EXIT_U3" : "",
+		__entry->intr & VBUS_RISE_INTR ? "VBUS_RISE" : "",
+		__entry->intr & VBUS_FALL_INTR ? "VBUS_FALL" : ""
+	)
+);
+
+TRACE_EVENT(mtu3_u2_common_isr,
+	TP_PROTO(u32 intr),
+	TP_ARGS(intr),
+	TP_STRUCT__entry(
+		__field(u32, intr)
+	),
+	TP_fast_assign(
+		__entry->intr = intr;
+	),
+	TP_printk("(%08x) %s %s %s", __entry->intr,
+		__entry->intr & SUSPEND_INTR ? "SUSPEND" : "",
+		__entry->intr & RESUME_INTR ? "RESUME" : "",
+		__entry->intr & RESET_INTR ? "RESET" : ""
+	)
+);
+
+TRACE_EVENT(mtu3_qmu_isr,
+	TP_PROTO(u32 done_intr, u32 exp_intr),
+	TP_ARGS(done_intr, exp_intr),
+	TP_STRUCT__entry(
+		__field(u32, done_intr)
+		__field(u32, exp_intr)
+	),
+	TP_fast_assign(
+		__entry->done_intr = done_intr;
+		__entry->exp_intr = exp_intr;
+	),
+	TP_printk("done (tx %04x, rx %04x), exp (%08x)",
+		__entry->done_intr & 0xffff,
+		__entry->done_intr >> 16,
+		__entry->exp_intr
+	)
+);
+
+DECLARE_EVENT_CLASS(mtu3_log_setup,
+	TP_PROTO(struct usb_ctrlrequest *setup),
+	TP_ARGS(setup),
+	TP_STRUCT__entry(
+		__field(__u8, bRequestType)
+		__field(__u8, bRequest)
+		__field(__u16, wValue)
+		__field(__u16, wIndex)
+		__field(__u16, wLength)
+	),
+	TP_fast_assign(
+		__entry->bRequestType = setup->bRequestType;
+		__entry->bRequest = setup->bRequest;
+		__entry->wValue = le16_to_cpu(setup->wValue);
+		__entry->wIndex = le16_to_cpu(setup->wIndex);
+		__entry->wLength = le16_to_cpu(setup->wLength);
+	),
+	TP_printk("setup - %02x %02x %04x %04x %04x",
+		__entry->bRequestType, __entry->bRequest,
+		__entry->wValue, __entry->wIndex, __entry->wLength
+	)
+);
+
+DEFINE_EVENT(mtu3_log_setup, mtu3_handle_setup,
+	TP_PROTO(struct usb_ctrlrequest *setup),
+	TP_ARGS(setup)
+);
+
+DECLARE_EVENT_CLASS(mtu3_log_request,
+	TP_PROTO(struct mtu3_request *mreq),
+	TP_ARGS(mreq),
+	TP_STRUCT__entry(
+		__string(name, mreq->mep->name)
+		__field(struct mtu3_request *, mreq)
+		__field(struct qmu_gpd *, gpd)
+		__field(unsigned int, actual)
+		__field(unsigned int, length)
+		__field(int, status)
+		__field(int, zero)
+		__field(int, no_interrupt)
+	),
+	TP_fast_assign(
+		__assign_str(name, mreq->mep->name);
+		__entry->mreq = mreq;
+		__entry->gpd = mreq->gpd;
+		__entry->actual = mreq->request.actual;
+		__entry->length = mreq->request.length;
+		__entry->status = mreq->request.status;
+		__entry->zero = mreq->request.zero;
+		__entry->no_interrupt = mreq->request.no_interrupt;
+	),
+	TP_printk("%s: req %p gpd %p len %u/%u %s%s --> %d",
+		__get_str(name), __entry->mreq, __entry->gpd,
+		__entry->actual, __entry->length,
+		__entry->zero ? "Z" : "z",
+		__entry->no_interrupt ? "i" : "I",
+		__entry->status
+	)
+);
+
+DEFINE_EVENT(mtu3_log_request, mtu3_alloc_request,
+	TP_PROTO(struct mtu3_request *req),
+	TP_ARGS(req)
+);
+
+DEFINE_EVENT(mtu3_log_request, mtu3_free_request,
+	TP_PROTO(struct mtu3_request *req),
+	TP_ARGS(req)
+);
+
+DEFINE_EVENT(mtu3_log_request, mtu3_gadget_queue,
+	TP_PROTO(struct mtu3_request *req),
+	TP_ARGS(req)
+);
+
+DEFINE_EVENT(mtu3_log_request, mtu3_gadget_dequeue,
+	TP_PROTO(struct mtu3_request *req),
+	TP_ARGS(req)
+);
+
+DEFINE_EVENT(mtu3_log_request, mtu3_req_complete,
+	TP_PROTO(struct mtu3_request *req),
+	TP_ARGS(req)
+);
+
+DECLARE_EVENT_CLASS(mtu3_log_gpd,
+	TP_PROTO(struct mtu3_ep *mep, struct qmu_gpd *gpd),
+	TP_ARGS(mep, gpd),
+	TP_STRUCT__entry(
+		__string(name, mep->name)
+		__field(struct qmu_gpd *, gpd)
+		__field(u32, dw0)
+		__field(u32, dw1)
+		__field(u32, dw2)
+		__field(u32, dw3)
+	),
+	TP_fast_assign(
+		__assign_str(name, mep->name);
+		__entry->gpd = gpd;
+		__entry->dw0 = le32_to_cpu(gpd->dw0_info);
+		__entry->dw1 = le32_to_cpu(gpd->next_gpd);
+		__entry->dw2 = le32_to_cpu(gpd->buffer);
+		__entry->dw3 = le32_to_cpu(gpd->dw3_info);
+	),
+	TP_printk("%s: gpd %p - %08x %08x %08x %08x",
+		__get_str(name), __entry->gpd,
+		__entry->dw0, __entry->dw1,
+		__entry->dw2, __entry->dw3
+	)
+);
+
+DEFINE_EVENT(mtu3_log_gpd, mtu3_prepare_gpd,
+	TP_PROTO(struct mtu3_ep *mep, struct qmu_gpd *gpd),
+	TP_ARGS(mep, gpd)
+);
+
+DEFINE_EVENT(mtu3_log_gpd, mtu3_complete_gpd,
+	TP_PROTO(struct mtu3_ep *mep, struct qmu_gpd *gpd),
+	TP_ARGS(mep, gpd)
+);
+
+DEFINE_EVENT(mtu3_log_gpd, mtu3_zlp_exp_gpd,
+	TP_PROTO(struct mtu3_ep *mep, struct qmu_gpd *gpd),
+	TP_ARGS(mep, gpd)
+);
+
+DECLARE_EVENT_CLASS(mtu3_log_ep,
+	TP_PROTO(struct mtu3_ep *mep),
+	TP_ARGS(mep),
+	TP_STRUCT__entry(
+		__string(name, mep->name)
+		__field(unsigned int, type)
+		__field(unsigned int, slot)
+		__field(unsigned int, maxp)
+		__field(unsigned int, mult)
+		__field(unsigned int, maxburst)
+		__field(unsigned int, flags)
+		__field(unsigned int, direction)
+		__field(struct mtu3_gpd_ring *, gpd_ring)
+	),
+	TP_fast_assign(
+		__assign_str(name, mep->name);
+		__entry->type = mep->type;
+		__entry->slot = mep->slot;
+		__entry->maxp = mep->ep.maxpacket;
+		__entry->mult = mep->ep.mult;
+		__entry->maxburst = mep->ep.maxburst;
+		__entry->flags = mep->flags;
+		__entry->direction = mep->is_in;
+		__entry->gpd_ring = &mep->gpd_ring;
+	),
+	TP_printk("%s: type %d maxp %d slot %d mult %d burst %d ring %p/%pad flags %c:%c%c%c:%c",
+		__get_str(name), __entry->type,
+		__entry->maxp, __entry->slot,
+		__entry->mult, __entry->maxburst,
+		__entry->gpd_ring, &__entry->gpd_ring->dma,
+		__entry->flags & MTU3_EP_ENABLED ? 'E' : 'e',
+		__entry->flags & MTU3_EP_STALL ? 'S' : 's',
+		__entry->flags & MTU3_EP_WEDGE ? 'W' : 'w',
+		__entry->flags & MTU3_EP_BUSY ? 'B' : 'b',
+		__entry->direction ? '<' : '>'
+	)
+);
+
+DEFINE_EVENT(mtu3_log_ep, mtu3_gadget_ep_enable,
+	TP_PROTO(struct mtu3_ep *mep),
+	TP_ARGS(mep)
+);
+
+DEFINE_EVENT(mtu3_log_ep, mtu3_gadget_ep_disable,
+	TP_PROTO(struct mtu3_ep *mep),
+	TP_ARGS(mep)
+);
+
+DEFINE_EVENT(mtu3_log_ep, mtu3_gadget_ep_set_halt,
+	TP_PROTO(struct mtu3_ep *mep),
+	TP_ARGS(mep)
+);
+
+#endif /* __MTU3_TRACE_H__ */
+
+/* this part has to be here */
+
+#undef TRACE_INCLUDE_PATH
+#define TRACE_INCLUDE_PATH .
+
+#undef TRACE_INCLUDE_FILE
+#define TRACE_INCLUDE_FILE mtu3_trace
+
+#include <trace/define_trace.h>
diff --git a/drivers/usb/musb/Kconfig b/drivers/usb/musb/Kconfig
index f742fddc5e2c..52f8e2b57ad5 100644
--- a/drivers/usb/musb/Kconfig
+++ b/drivers/usb/musb/Kconfig
@@ -67,7 +67,7 @@ config USB_MUSB_SUNXI
 	depends on NOP_USB_XCEIV
 	depends on PHY_SUN4I_USB
 	depends on EXTCON
-	depends on GENERIC_PHY
+	select GENERIC_PHY
 	select SUNXI_SRAM
 
 config USB_MUSB_DAVINCI
diff --git a/drivers/usb/musb/jz4740.c b/drivers/usb/musb/jz4740.c
index a60627bf7be3..5261f8dfedec 100644
--- a/drivers/usb/musb/jz4740.c
+++ b/drivers/usb/musb/jz4740.c
@@ -74,10 +74,14 @@ static struct musb_hdrc_platform_data jz4740_musb_platform_data = {
 
 static int jz4740_musb_init(struct musb *musb)
 {
-	usb_phy_generic_register();
-	musb->xceiv = usb_get_phy(USB_PHY_TYPE_USB2);
+	struct device *dev = musb->controller->parent;
+
+	if (dev->of_node)
+		musb->xceiv = devm_usb_get_phy_by_phandle(dev, "phys", 0);
+	else
+		musb->xceiv = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
 	if (IS_ERR(musb->xceiv)) {
-		pr_err("HS UDC: no transceiver configured\n");
+		dev_err(dev, "No transceiver configured\n");
 		return PTR_ERR(musb->xceiv);
 	}
 
@@ -91,13 +95,6 @@ static int jz4740_musb_init(struct musb *musb)
 	return 0;
 }
 
-static int jz4740_musb_exit(struct musb *musb)
-{
-	usb_put_phy(musb->xceiv);
-
-	return 0;
-}
-
 /*
  * DMA has not been confirmed to work with CONFIG_USB_INVENTRA_DMA,
  * so let's not set up the dma function pointers yet.
@@ -106,7 +103,6 @@ static const struct musb_platform_ops jz4740_musb_ops = {
 	.quirks		= MUSB_DMA_INVENTRA | MUSB_INDEXED_EP,
 	.fifo_mode	= 2,
 	.init		= jz4740_musb_init,
-	.exit		= jz4740_musb_exit,
 };
 
 static int jz4740_probe(struct platform_device *pdev)
@@ -183,7 +179,6 @@ static int jz4740_remove(struct platform_device *pdev)
 	struct jz4740_glue	*glue = platform_get_drvdata(pdev);
 
 	platform_device_unregister(glue->musb);
-	usb_phy_generic_unregister(pdev);
 	clk_disable_unprepare(glue->clk);
 
 	return 0;
diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
index b7d56272f9d1..9f5a4819a744 100644
--- a/drivers/usb/musb/musb_core.c
+++ b/drivers/usb/musb/musb_core.c
@@ -1497,10 +1497,11 @@ static int musb_core_init(u16 musb_type, struct musb *musb)
 	} else {
 		musb->is_multipoint = 0;
 		type = "";
-#ifndef	CONFIG_USB_OTG_BLACKLIST_HUB
-		pr_err("%s: kernel must blacklist external hubs\n",
-		       musb_driver_name);
-#endif
+		if (IS_ENABLED(CONFIG_USB) &&
+		    !IS_ENABLED(CONFIG_USB_OTG_BLACKLIST_HUB)) {
+			pr_err("%s: kernel must blacklist external hubs\n",
+			       musb_driver_name);
+		}
 	}
 
 	/* log release info */
diff --git a/drivers/usb/musb/musb_dsps.c b/drivers/usb/musb/musb_dsps.c
index 403eb97915f8..327d4f7baaf7 100644
--- a/drivers/usb/musb/musb_dsps.c
+++ b/drivers/usb/musb/musb_dsps.c
@@ -168,8 +168,7 @@ static void dsps_mod_timer_optional(struct dsps_glue *glue)
 static void dsps_musb_enable(struct musb *musb)
 {
 	struct device *dev = musb->controller;
-	struct platform_device *pdev = to_platform_device(dev->parent);
-	struct dsps_glue *glue = platform_get_drvdata(pdev);
+	struct dsps_glue *glue = dev_get_drvdata(dev->parent);
 	const struct dsps_musb_wrapper *wrp = glue->wrp;
 	void __iomem *reg_base = musb->ctrl_base;
 	u32 epmask, coremask;
@@ -195,8 +194,7 @@ static void dsps_musb_enable(struct musb *musb)
 static void dsps_musb_disable(struct musb *musb)
 {
 	struct device *dev = musb->controller;
-	struct platform_device *pdev = to_platform_device(dev->parent);
-	struct dsps_glue *glue = platform_get_drvdata(pdev);
+	struct dsps_glue *glue = dev_get_drvdata(dev->parent);
 	const struct dsps_musb_wrapper *wrp = glue->wrp;
 	void __iomem *reg_base = musb->ctrl_base;
 
diff --git a/drivers/usb/musb/omap2430.c b/drivers/usb/musb/omap2430.c
index b1dd81fb5f55..a3d2fef67746 100644
--- a/drivers/usb/musb/omap2430.c
+++ b/drivers/usb/musb/omap2430.c
@@ -531,6 +531,9 @@ static int omap2430_runtime_suspend(struct device *dev)
 
 	omap2430_low_level_exit(musb);
 
+	phy_power_off(musb->phy);
+	phy_exit(musb->phy);
+
 	return 0;
 }
 
@@ -542,6 +545,9 @@ static int omap2430_runtime_resume(struct device *dev)
 	if (!musb)
 		return 0;
 
+	phy_init(musb->phy);
+	phy_power_on(musb->phy);
+
 	omap2430_low_level_init(musb);
 	musb_writel(musb->mregs, OTG_INTERFSEL,
 		    musb->context.otg_interfsel);
diff --git a/drivers/usb/phy/Kconfig b/drivers/usb/phy/Kconfig
index 8c509b060c09..24b4f091acb8 100644
--- a/drivers/usb/phy/Kconfig
+++ b/drivers/usb/phy/Kconfig
@@ -21,7 +21,7 @@ config AB8500_USB
 	  in host mode, low speed.
 
 config FSL_USB2_OTG
-	bool "Freescale USB OTG Transceiver Driver"
+	tristate "Freescale USB OTG Transceiver Driver"
 	depends on USB_EHCI_FSL && USB_FSL_USB2 && USB_OTG_FSM=y && PM
 	depends on USB_GADGET || !USB_GADGET # if USB_GADGET=m, this can't be 'y'
 	select USB_PHY
diff --git a/drivers/usb/serial/ark3116.c b/drivers/usb/serial/ark3116.c
index ff38aa8963cf..71a9206ea1e2 100644
--- a/drivers/usb/serial/ark3116.c
+++ b/drivers/usb/serial/ark3116.c
@@ -189,16 +189,6 @@ static int ark3116_port_remove(struct usb_serial_port *port)
 	return 0;
 }
 
-static void ark3116_init_termios(struct tty_struct *tty)
-{
-	struct ktermios *termios = &tty->termios;
-	*termios = tty_std_termios;
-	termios->c_cflag = B9600 | CS8
-				      | CREAD | HUPCL | CLOCAL;
-	termios->c_ispeed = 9600;
-	termios->c_ospeed = 9600;
-}
-
 static void ark3116_set_termios(struct tty_struct *tty,
 				struct usb_serial_port *port,
 				struct ktermios *old_termios)
@@ -645,7 +635,6 @@ static struct usb_serial_driver ark3116_device = {
 	.port_probe =		ark3116_port_probe,
 	.port_remove =		ark3116_port_remove,
 	.set_termios =		ark3116_set_termios,
-	.init_termios =		ark3116_init_termios,
 	.get_serial =		ark3116_get_serial_info,
 	.tiocmget =		ark3116_tiocmget,
 	.tiocmset =		ark3116_tiocmset,
diff --git a/drivers/usb/serial/cypress_m8.c b/drivers/usb/serial/cypress_m8.c
index ed51bc48eea6..72d3ae1ebc64 100644
--- a/drivers/usb/serial/cypress_m8.c
+++ b/drivers/usb/serial/cypress_m8.c
@@ -98,7 +98,6 @@ struct cypress_private {
 	int write_urb_interval;            /* interval to use for write urb */
 	int read_urb_interval;             /* interval to use for read urb */
 	int comm_is_ok;                    /* true if communication is (still) ok */
-	int termios_initialized;
 	__u8 line_control;	   	   /* holds dtr / rts value */
 	__u8 current_status;	   	   /* received from last read - info on dsr,cts,cd,ri,etc */
 	__u8 current_config;	   	   /* stores the current configuration byte */
@@ -107,11 +106,7 @@ struct cypress_private {
 	int get_cfg_unsafe;		   /* If true, the CYPRESS_GET_CONFIG is unsafe */
 	int baud_rate;			   /* stores current baud rate in
 					      integer form */
-	int isthrottled;		   /* if throttled, discard reads */
 	char prev_status;		   /* used for TIOCMIWAIT */
-	/* we pass a pointer to this as the argument sent to
-	   cypress_set_termios old_termios */
-	struct ktermios tmp_termios; 	   /* stores the old termios settings */
 };
 
 /* function prototypes for the Cypress USB to serial device */
@@ -126,6 +121,7 @@ static int  cypress_write(struct tty_struct *tty, struct usb_serial_port *port,
 			const unsigned char *buf, int count);
 static void cypress_send(struct usb_serial_port *port);
 static int  cypress_write_room(struct tty_struct *tty);
+static void cypress_earthmate_init_termios(struct tty_struct *tty);
 static void cypress_set_termios(struct tty_struct *tty,
 			struct usb_serial_port *port, struct ktermios *old);
 static int  cypress_tiocmget(struct tty_struct *tty);
@@ -153,6 +149,7 @@ static struct usb_serial_driver cypress_earthmate_device = {
 	.dtr_rts =			cypress_dtr_rts,
 	.write =			cypress_write,
 	.write_room =			cypress_write_room,
+	.init_termios =			cypress_earthmate_init_termios,
 	.set_termios =			cypress_set_termios,
 	.tiocmget =			cypress_tiocmget,
 	.tiocmset =			cypress_tiocmset,
@@ -467,7 +464,6 @@ static int cypress_generic_port_probe(struct usb_serial_port *port)
 
 	priv->cmd_ctrl = 0;
 	priv->line_control = 0;
-	priv->termios_initialized = 0;
 	priv->rx_flags = 0;
 	/* Default packet format setting is determined by packet size.
 	   Anything with a size larger then 9 must have a separate
@@ -604,7 +600,7 @@ static int cypress_open(struct tty_struct *tty, struct usb_serial_port *port)
 	cypress_send(port);
 
 	if (tty)
-		cypress_set_termios(tty, port, &priv->tmp_termios);
+		cypress_set_termios(tty, port, NULL);
 
 	/* setup the port and start reading from the device */
 	usb_fill_int_urb(port->interrupt_in_urb, serial->dev,
@@ -857,6 +853,11 @@ static int cypress_tiocmset(struct tty_struct *tty,
 	return cypress_write(tty, port, NULL, 0);
 }
 
+static void cypress_earthmate_init_termios(struct tty_struct *tty)
+{
+	tty_encode_baud_rate(tty, 4800, 4800);
+}
+
 static void cypress_set_termios(struct tty_struct *tty,
 	struct usb_serial_port *port, struct ktermios *old_termios)
 {
@@ -868,45 +869,11 @@ static void cypress_set_termios(struct tty_struct *tty,
 	__u8 oldlines;
 	int linechange = 0;
 
-	spin_lock_irqsave(&priv->lock, flags);
-	/* We can't clean this one up as we don't know the device type
-	   early enough */
-	if (!priv->termios_initialized) {
-		if (priv->chiptype == CT_EARTHMATE) {
-			tty->termios = tty_std_termios;
-			tty->termios.c_cflag = B4800 | CS8 | CREAD | HUPCL |
-				CLOCAL;
-			tty->termios.c_ispeed = 4800;
-			tty->termios.c_ospeed = 4800;
-		} else if (priv->chiptype == CT_CYPHIDCOM) {
-			tty->termios = tty_std_termios;
-			tty->termios.c_cflag = B9600 | CS8 | CREAD | HUPCL |
-				CLOCAL;
-			tty->termios.c_ispeed = 9600;
-			tty->termios.c_ospeed = 9600;
-		} else if (priv->chiptype == CT_CA42V2) {
-			tty->termios = tty_std_termios;
-			tty->termios.c_cflag = B9600 | CS8 | CREAD | HUPCL |
-				CLOCAL;
-			tty->termios.c_ispeed = 9600;
-			tty->termios.c_ospeed = 9600;
-		}
-		priv->termios_initialized = 1;
-	}
-	spin_unlock_irqrestore(&priv->lock, flags);
-
 	/* Unsupported features need clearing */
 	tty->termios.c_cflag &= ~(CMSPAR|CRTSCTS);
 
 	cflag = tty->termios.c_cflag;
 
-	/* check if there are new settings */
-	if (old_termios) {
-		spin_lock_irqsave(&priv->lock, flags);
-		priv->tmp_termios = tty->termios;
-		spin_unlock_irqrestore(&priv->lock, flags);
-	}
-
 	/* set number of data bits, parity, stop bits */
 	/* when parity is disabled the parity type bit is ignored */
 
diff --git a/drivers/usb/serial/digi_acceleport.c b/drivers/usb/serial/digi_acceleport.c
index e7f244cf2c07..578ebdd86520 100644
--- a/drivers/usb/serial/digi_acceleport.c
+++ b/drivers/usb/serial/digi_acceleport.c
@@ -569,9 +569,9 @@ static int digi_set_modem_signals(struct usb_serial_port *port,
 	ret = usb_submit_urb(oob_port->write_urb, GFP_ATOMIC);
 	if (ret == 0) {
 		oob_priv->dp_write_urb_in_use = 1;
-		port_priv->dp_modem_signals =
-			(port_priv->dp_modem_signals&~(TIOCM_DTR|TIOCM_RTS))
-			| (modem_signals&(TIOCM_DTR|TIOCM_RTS));
+		port_priv->dp_modem_signals &= ~(TIOCM_DTR | TIOCM_RTS);
+		port_priv->dp_modem_signals |=
+				modem_signals & (TIOCM_DTR | TIOCM_RTS);
 	}
 	spin_unlock(&port_priv->dp_port_lock);
 	spin_unlock_irqrestore(&oob_priv->dp_port_lock, flags);
@@ -740,9 +740,9 @@ static void digi_set_termios(struct tty_struct *tty,
 	/* set parity */
 	tty->termios.c_cflag &= ~CMSPAR;
 
-	if ((cflag&(PARENB|PARODD)) != (old_cflag&(PARENB|PARODD))) {
-		if (cflag&PARENB) {
-			if (cflag&PARODD)
+	if ((cflag & (PARENB | PARODD)) != (old_cflag & (PARENB | PARODD))) {
+		if (cflag & PARENB) {
+			if (cflag & PARODD)
 				arg = DIGI_PARITY_ODD;
 			else
 				arg = DIGI_PARITY_EVEN;
@@ -755,9 +755,9 @@ static void digi_set_termios(struct tty_struct *tty,
 		buf[i++] = 0;
 	}
 	/* set word size */
-	if ((cflag&CSIZE) != (old_cflag&CSIZE)) {
+	if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
 		arg = -1;
-		switch (cflag&CSIZE) {
+		switch (cflag & CSIZE) {
 		case CS5: arg = DIGI_WORD_SIZE_5; break;
 		case CS6: arg = DIGI_WORD_SIZE_6; break;
 		case CS7: arg = DIGI_WORD_SIZE_7; break;
@@ -765,7 +765,7 @@ static void digi_set_termios(struct tty_struct *tty,
 		default:
 			dev_dbg(dev,
 				"digi_set_termios: can't handle word size %d\n",
-				(cflag&CSIZE));
+				cflag & CSIZE);
 			break;
 		}
 
@@ -779,9 +779,9 @@ static void digi_set_termios(struct tty_struct *tty,
 	}
 
 	/* set stop bits */
-	if ((cflag&CSTOPB) != (old_cflag&CSTOPB)) {
+	if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) {
 
-		if ((cflag&CSTOPB))
+		if ((cflag & CSTOPB))
 			arg = DIGI_STOP_BITS_2;
 		else
 			arg = DIGI_STOP_BITS_1;
@@ -794,15 +794,15 @@ static void digi_set_termios(struct tty_struct *tty,
 	}
 
 	/* set input flow control */
-	if ((iflag&IXOFF) != (old_iflag&IXOFF)
-	    || (cflag&CRTSCTS) != (old_cflag&CRTSCTS)) {
+	if ((iflag & IXOFF) != (old_iflag & IXOFF) ||
+			(cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
 		arg = 0;
-		if (iflag&IXOFF)
+		if (iflag & IXOFF)
 			arg |= DIGI_INPUT_FLOW_CONTROL_XON_XOFF;
 		else
 			arg &= ~DIGI_INPUT_FLOW_CONTROL_XON_XOFF;
 
-		if (cflag&CRTSCTS) {
+		if (cflag & CRTSCTS) {
 			arg |= DIGI_INPUT_FLOW_CONTROL_RTS;
 
 			/* On USB-4 it is necessary to assert RTS prior */
@@ -822,19 +822,18 @@ static void digi_set_termios(struct tty_struct *tty,
 	}
 
 	/* set output flow control */
-	if ((iflag & IXON) != (old_iflag & IXON)
-	    || (cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
+	if ((iflag & IXON) != (old_iflag & IXON) ||
+			(cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
 		arg = 0;
 		if (iflag & IXON)
 			arg |= DIGI_OUTPUT_FLOW_CONTROL_XON_XOFF;
 		else
 			arg &= ~DIGI_OUTPUT_FLOW_CONTROL_XON_XOFF;
 
-		if (cflag & CRTSCTS) {
+		if (cflag & CRTSCTS)
 			arg |= DIGI_OUTPUT_FLOW_CONTROL_CTS;
-		} else {
+		else
 			arg &= ~DIGI_OUTPUT_FLOW_CONTROL_CTS;
-		}
 
 		buf[i++] = DIGI_CMD_SET_OUTPUT_FLOW_CONTROL;
 		buf[i++] = priv->dp_port_num;
@@ -1084,7 +1083,7 @@ static int digi_chars_in_buffer(struct tty_struct *tty)
 static void digi_dtr_rts(struct usb_serial_port *port, int on)
 {
 	/* Adjust DTR and RTS */
-	digi_set_modem_signals(port, on * (TIOCM_DTR|TIOCM_RTS), 1);
+	digi_set_modem_signals(port, on * (TIOCM_DTR | TIOCM_RTS), 1);
 }
 
 static int digi_open(struct tty_struct *tty, struct usb_serial_port *port)
diff --git a/drivers/usb/serial/f81232.c b/drivers/usb/serial/f81232.c
index 0dcdcb4b2cde..43fa1f0716b7 100644
--- a/drivers/usb/serial/f81232.c
+++ b/drivers/usb/serial/f81232.c
@@ -28,7 +28,8 @@ static const struct usb_device_id id_table[] = {
 MODULE_DEVICE_TABLE(usb, id_table);
 
 /* Maximum baudrate for F81232 */
-#define F81232_MAX_BAUDRATE		115200
+#define F81232_MAX_BAUDRATE		1500000
+#define F81232_DEF_BAUDRATE		9600
 
 /* USB Control EP parameter */
 #define F81232_REGISTER_REQUEST		0xa0
@@ -41,19 +42,46 @@ MODULE_DEVICE_TABLE(usb, id_table);
 #define FIFO_CONTROL_REGISTER		(0x02 + SERIAL_BASE_ADDRESS)
 #define LINE_CONTROL_REGISTER		(0x03 + SERIAL_BASE_ADDRESS)
 #define MODEM_CONTROL_REGISTER		(0x04 + SERIAL_BASE_ADDRESS)
+#define LINE_STATUS_REGISTER		(0x05 + SERIAL_BASE_ADDRESS)
 #define MODEM_STATUS_REGISTER		(0x06 + SERIAL_BASE_ADDRESS)
 
+/*
+ * F81232 Clock registers (106h)
+ *
+ * Bit1-0:	Clock source selector
+ *			00: 1.846MHz.
+ *			01: 18.46MHz.
+ *			10: 24MHz.
+ *			11: 14.77MHz.
+ */
+#define F81232_CLK_REGISTER		0x106
+#define F81232_CLK_1_846_MHZ		0
+#define F81232_CLK_18_46_MHZ		BIT(0)
+#define F81232_CLK_24_MHZ		BIT(1)
+#define F81232_CLK_14_77_MHZ		(BIT(1) | BIT(0))
+#define F81232_CLK_MASK			GENMASK(1, 0)
+
 struct f81232_private {
 	struct mutex lock;
 	u8 modem_control;
 	u8 modem_status;
+	u8 shadow_lcr;
+	speed_t baud_base;
+	struct work_struct lsr_work;
 	struct work_struct interrupt_work;
 	struct usb_serial_port *port;
 };
 
-static int calc_baud_divisor(speed_t baudrate)
+static u32 const baudrate_table[] = { 115200, 921600, 1152000, 1500000 };
+static u8 const clock_table[] = { F81232_CLK_1_846_MHZ, F81232_CLK_14_77_MHZ,
+				F81232_CLK_18_46_MHZ, F81232_CLK_24_MHZ };
+
+static int calc_baud_divisor(speed_t baudrate, speed_t clockrate)
 {
-	return DIV_ROUND_CLOSEST(F81232_MAX_BAUDRATE, baudrate);
+	if (!baudrate)
+		return 0;
+
+	return DIV_ROUND_CLOSEST(clockrate, baudrate);
 }
 
 static int f81232_get_register(struct usb_serial_port *port, u16 reg, u8 *val)
@@ -127,6 +155,21 @@ static int f81232_set_register(struct usb_serial_port *port, u16 reg, u8 val)
 	return status;
 }
 
+static int f81232_set_mask_register(struct usb_serial_port *port, u16 reg,
+					u8 mask, u8 val)
+{
+	int status;
+	u8 tmp;
+
+	status = f81232_get_register(port, reg, &tmp);
+	if (status)
+		return status;
+
+	tmp = (tmp & ~mask) | (val & mask);
+
+	return f81232_set_register(port, reg, tmp);
+}
+
 static void f81232_read_msr(struct usb_serial_port *port)
 {
 	int status;
@@ -282,6 +325,7 @@ exit:
 static void f81232_process_read_urb(struct urb *urb)
 {
 	struct usb_serial_port *port = urb->context;
+	struct f81232_private *priv = usb_get_serial_port_data(port);
 	unsigned char *data = urb->transfer_buffer;
 	char tty_flag;
 	unsigned int i;
@@ -315,6 +359,7 @@ static void f81232_process_read_urb(struct urb *urb)
 
 			if (lsr & UART_LSR_OE) {
 				port->icount.overrun++;
+				schedule_work(&priv->lsr_work);
 				tty_insert_flip_char(&port->port, 0,
 						TTY_OVERRUN);
 			}
@@ -333,22 +378,72 @@ static void f81232_process_read_urb(struct urb *urb)
 
 static void f81232_break_ctl(struct tty_struct *tty, int break_state)
 {
-	/* FIXME - Stubbed out for now */
+	struct usb_serial_port *port = tty->driver_data;
+	struct f81232_private *priv = usb_get_serial_port_data(port);
+	int status;
 
-	/*
-	 * break_state = -1 to turn on break, and 0 to turn off break
-	 * see drivers/char/tty_io.c to see it used.
-	 * last_set_data_urb_value NEVER has the break bit set in it.
-	 */
+	mutex_lock(&priv->lock);
+
+	if (break_state)
+		priv->shadow_lcr |= UART_LCR_SBC;
+	else
+		priv->shadow_lcr &= ~UART_LCR_SBC;
+
+	status = f81232_set_register(port, LINE_CONTROL_REGISTER,
+					priv->shadow_lcr);
+	if (status)
+		dev_err(&port->dev, "set break failed: %d\n", status);
+
+	mutex_unlock(&priv->lock);
 }
 
-static void f81232_set_baudrate(struct usb_serial_port *port, speed_t baudrate)
+static int f81232_find_clk(speed_t baudrate)
 {
+	int idx;
+
+	for (idx = 0; idx < ARRAY_SIZE(baudrate_table); ++idx) {
+		if (baudrate <= baudrate_table[idx] &&
+				baudrate_table[idx] % baudrate == 0)
+			return idx;
+	}
+
+	return -EINVAL;
+}
+
+static void f81232_set_baudrate(struct tty_struct *tty,
+				struct usb_serial_port *port, speed_t baudrate,
+				speed_t old_baudrate)
+{
+	struct f81232_private *priv = usb_get_serial_port_data(port);
 	u8 lcr;
 	int divisor;
 	int status = 0;
+	int i;
+	int idx;
+	speed_t baud_list[] = { baudrate, old_baudrate, F81232_DEF_BAUDRATE };
+
+	for (i = 0; i < ARRAY_SIZE(baud_list); ++i) {
+		idx = f81232_find_clk(baud_list[i]);
+		if (idx >= 0) {
+			baudrate = baud_list[i];
+			tty_encode_baud_rate(tty, baudrate, baudrate);
+			break;
+		}
+	}
 
-	divisor = calc_baud_divisor(baudrate);
+	if (idx < 0)
+		return;
+
+	priv->baud_base = baudrate_table[idx];
+	divisor = calc_baud_divisor(baudrate, priv->baud_base);
+
+	status = f81232_set_mask_register(port, F81232_CLK_REGISTER,
+			F81232_CLK_MASK, clock_table[idx]);
+	if (status) {
+		dev_err(&port->dev, "%s failed to set CLK_REG: %d\n",
+			__func__, status);
+		return;
+	}
 
 	status = f81232_get_register(port, LINE_CONTROL_REGISTER,
 			 &lcr); /* get LCR */
@@ -435,9 +530,11 @@ static int f81232_port_disable(struct usb_serial_port *port)
 static void f81232_set_termios(struct tty_struct *tty,
 		struct usb_serial_port *port, struct ktermios *old_termios)
 {
+	struct f81232_private *priv = usb_get_serial_port_data(port);
 	u8 new_lcr = 0;
 	int status = 0;
 	speed_t baudrate;
+	speed_t old_baud;
 
 	/* Don't change anything if nothing has changed */
 	if (old_termios && !tty_termios_hw_change(&tty->termios, old_termios))
@@ -450,11 +547,12 @@ static void f81232_set_termios(struct tty_struct *tty,
 
 	baudrate = tty_get_baud_rate(tty);
 	if (baudrate > 0) {
-		if (baudrate > F81232_MAX_BAUDRATE) {
-			baudrate = F81232_MAX_BAUDRATE;
-			tty_encode_baud_rate(tty, baudrate, baudrate);
-		}
-		f81232_set_baudrate(port, baudrate);
+		if (old_termios)
+			old_baud = tty_termios_baud_rate(old_termios);
+		else
+			old_baud = F81232_DEF_BAUDRATE;
+
+		f81232_set_baudrate(tty, port, baudrate, old_baud);
 	}
 
 	if (C_PARENB(tty)) {
@@ -486,11 +584,18 @@ static void f81232_set_termios(struct tty_struct *tty,
 		break;
 	}
 
+	mutex_lock(&priv->lock);
+
+	new_lcr |= (priv->shadow_lcr & UART_LCR_SBC);
 	status = f81232_set_register(port, LINE_CONTROL_REGISTER, new_lcr);
 	if (status) {
 		dev_err(&port->dev, "%s failed to set LCR: %d\n",
 			__func__, status);
 	}
+
+	priv->shadow_lcr = new_lcr;
+
+	mutex_unlock(&priv->lock);
 }
 
 static int f81232_tiocmget(struct tty_struct *tty)
@@ -556,9 +661,13 @@ static int f81232_open(struct tty_struct *tty, struct usb_serial_port *port)
 
 static void f81232_close(struct usb_serial_port *port)
 {
+	struct f81232_private *port_priv = usb_get_serial_port_data(port);
+
 	f81232_port_disable(port);
 	usb_serial_generic_close(port);
 	usb_kill_urb(port->interrupt_in_urb);
+	flush_work(&port_priv->interrupt_work);
+	flush_work(&port_priv->lsr_work);
 }
 
 static void f81232_dtr_rts(struct usb_serial_port *port, int on)
@@ -587,11 +696,12 @@ static int f81232_get_serial_info(struct tty_struct *tty,
 		struct serial_struct *ss)
 {
 	struct usb_serial_port *port = tty->driver_data;
+	struct f81232_private *priv = usb_get_serial_port_data(port);
 
 	ss->type = PORT_16550A;
 	ss->line = port->minor;
 	ss->port = port->port_number;
-	ss->baud_base = F81232_MAX_BAUDRATE;
+	ss->baud_base = priv->baud_base;
 	return 0;
 }
 
@@ -603,6 +713,21 @@ static void  f81232_interrupt_work(struct work_struct *work)
 	f81232_read_msr(priv->port);
 }
 
+static void f81232_lsr_worker(struct work_struct *work)
+{
+	struct f81232_private *priv;
+	struct usb_serial_port *port;
+	int status;
+	u8 tmp;
+
+	priv = container_of(work, struct f81232_private, lsr_work);
+	port = priv->port;
+
+	status = f81232_get_register(port, LINE_STATUS_REGISTER, &tmp);
+	if (status)
+		dev_warn(&port->dev, "read LSR failed: %d\n", status);
+}
+
 static int f81232_port_probe(struct usb_serial_port *port)
 {
 	struct f81232_private *priv;
@@ -613,6 +738,7 @@ static int f81232_port_probe(struct usb_serial_port *port)
 
 	mutex_init(&priv->lock);
 	INIT_WORK(&priv->interrupt_work,  f81232_interrupt_work);
+	INIT_WORK(&priv->lsr_work, f81232_lsr_worker);
 
 	usb_set_serial_port_data(port, priv);
 
@@ -632,6 +758,42 @@ static int f81232_port_remove(struct usb_serial_port *port)
 	return 0;
 }
 
+static int f81232_suspend(struct usb_serial *serial, pm_message_t message)
+{
+	struct usb_serial_port *port = serial->port[0];
+	struct f81232_private *port_priv = usb_get_serial_port_data(port);
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i)
+		usb_kill_urb(port->read_urbs[i]);
+
+	usb_kill_urb(port->interrupt_in_urb);
+
+	if (port_priv) {
+		flush_work(&port_priv->interrupt_work);
+		flush_work(&port_priv->lsr_work);
+	}
+
+	return 0;
+}
+
+static int f81232_resume(struct usb_serial *serial)
+{
+	struct usb_serial_port *port = serial->port[0];
+	int result;
+
+	if (tty_port_initialized(&port->port)) {
+		result = usb_submit_urb(port->interrupt_in_urb, GFP_NOIO);
+		if (result) {
+			dev_err(&port->dev, "submit interrupt urb failed: %d\n",
+					result);
+			return result;
+		}
+	}
+
+	return usb_serial_generic_resume(serial);
+}
+
 static struct usb_serial_driver f81232_device = {
 	.driver = {
 		.owner =	THIS_MODULE,
@@ -655,6 +817,8 @@ static struct usb_serial_driver f81232_device = {
 	.read_int_callback =	f81232_read_int_callback,
 	.port_probe =		f81232_port_probe,
 	.port_remove =		f81232_port_remove,
+	.suspend =		f81232_suspend,
+	.resume =		f81232_resume,
 };
 
 static struct usb_serial_driver * const serial_drivers[] = {
diff --git a/drivers/usb/serial/generic.c b/drivers/usb/serial/generic.c
index 2274d9625f63..1be8bea372a2 100644
--- a/drivers/usb/serial/generic.c
+++ b/drivers/usb/serial/generic.c
@@ -106,12 +106,8 @@ void usb_serial_generic_deregister(void)
 int usb_serial_generic_open(struct tty_struct *tty, struct usb_serial_port *port)
 {
 	int result = 0;
-	unsigned long flags;
 
-	spin_lock_irqsave(&port->lock, flags);
-	port->throttled = 0;
-	port->throttle_req = 0;
-	spin_unlock_irqrestore(&port->lock, flags);
+	clear_bit(USB_SERIAL_THROTTLED, &port->flags);
 
 	if (port->bulk_in_size)
 		result = usb_serial_generic_submit_read_urbs(port, GFP_KERNEL);
@@ -375,7 +371,7 @@ void usb_serial_generic_read_bulk_callback(struct urb *urb)
 {
 	struct usb_serial_port *port = urb->context;
 	unsigned char *data = urb->transfer_buffer;
-	unsigned long flags;
+	bool stopped = false;
 	int status = urb->status;
 	int i;
 
@@ -383,42 +379,55 @@ void usb_serial_generic_read_bulk_callback(struct urb *urb)
 		if (urb == port->read_urbs[i])
 			break;
 	}
-	set_bit(i, &port->read_urbs_free);
 
 	dev_dbg(&port->dev, "%s - urb %d, len %d\n", __func__, i,
 							urb->actual_length);
 	switch (status) {
 	case 0:
+		usb_serial_debug_data(&port->dev, __func__, urb->actual_length,
+							data);
+		port->serial->type->process_read_urb(urb);
 		break;
 	case -ENOENT:
 	case -ECONNRESET:
 	case -ESHUTDOWN:
 		dev_dbg(&port->dev, "%s - urb stopped: %d\n",
 							__func__, status);
-		return;
+		stopped = true;
+		break;
 	case -EPIPE:
 		dev_err(&port->dev, "%s - urb stopped: %d\n",
 							__func__, status);
-		return;
+		stopped = true;
+		break;
 	default:
 		dev_dbg(&port->dev, "%s - nonzero urb status: %d\n",
 							__func__, status);
-		goto resubmit;
+		break;
 	}
 
-	usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data);
-	port->serial->type->process_read_urb(urb);
+	/*
+	 * Make sure URB processing is done before marking as free to avoid
+	 * racing with unthrottle() on another CPU. Matches the barriers
+	 * implied by the test_and_clear_bit() in
+	 * usb_serial_generic_submit_read_urb().
+	 */
+	smp_mb__before_atomic();
+	set_bit(i, &port->read_urbs_free);
+	/*
+	 * Make sure URB is marked as free before checking the throttled flag
+	 * to avoid racing with unthrottle() on another CPU. Matches the
+	 * smp_mb() in unthrottle().
+	 */
+	smp_mb__after_atomic();
 
-resubmit:
-	/* Throttle the device if requested by tty */
-	spin_lock_irqsave(&port->lock, flags);
-	port->throttled = port->throttle_req;
-	if (!port->throttled) {
-		spin_unlock_irqrestore(&port->lock, flags);
-		usb_serial_generic_submit_read_urb(port, i, GFP_ATOMIC);
-	} else {
-		spin_unlock_irqrestore(&port->lock, flags);
-	}
+	if (stopped)
+		return;
+
+	if (test_bit(USB_SERIAL_THROTTLED, &port->flags))
+		return;
+
+	usb_serial_generic_submit_read_urb(port, i, GFP_ATOMIC);
 }
 EXPORT_SYMBOL_GPL(usb_serial_generic_read_bulk_callback);
 
@@ -454,10 +463,9 @@ void usb_serial_generic_write_bulk_callback(struct urb *urb)
 	default:
 		dev_err_console(port, "%s - nonzero urb status: %d\n",
 							__func__, status);
-		goto resubmit;
+		break;
 	}
 
-resubmit:
 	usb_serial_generic_write_start(port, GFP_ATOMIC);
 	usb_serial_port_softint(port);
 }
@@ -466,26 +474,24 @@ EXPORT_SYMBOL_GPL(usb_serial_generic_write_bulk_callback);
 void usb_serial_generic_throttle(struct tty_struct *tty)
 {
 	struct usb_serial_port *port = tty->driver_data;
-	unsigned long flags;
 
-	spin_lock_irqsave(&port->lock, flags);
-	port->throttle_req = 1;
-	spin_unlock_irqrestore(&port->lock, flags);
+	set_bit(USB_SERIAL_THROTTLED, &port->flags);
 }
 EXPORT_SYMBOL_GPL(usb_serial_generic_throttle);
 
 void usb_serial_generic_unthrottle(struct tty_struct *tty)
 {
 	struct usb_serial_port *port = tty->driver_data;
-	int was_throttled;
 
-	spin_lock_irq(&port->lock);
-	was_throttled = port->throttled;
-	port->throttled = port->throttle_req = 0;
-	spin_unlock_irq(&port->lock);
+	clear_bit(USB_SERIAL_THROTTLED, &port->flags);
+
+	/*
+	 * Matches the smp_mb__after_atomic() in
+	 * usb_serial_generic_read_bulk_callback().
+	 */
+	smp_mb();
 
-	if (was_throttled)
-		usb_serial_generic_submit_read_urbs(port, GFP_KERNEL);
+	usb_serial_generic_submit_read_urbs(port, GFP_KERNEL);
 }
 EXPORT_SYMBOL_GPL(usb_serial_generic_unthrottle);
 
diff --git a/drivers/usb/serial/io_edgeport.c b/drivers/usb/serial/io_edgeport.c
index 4ca31c0e4174..48a439298a68 100644
--- a/drivers/usb/serial/io_edgeport.c
+++ b/drivers/usb/serial/io_edgeport.c
@@ -1751,7 +1751,7 @@ static void process_rcvd_data(struct edgeport_serial *edge_serial,
 				edge_serial->rxState = EXPECT_HDR2;
 				break;
 			}
-			/* otherwise, drop on through */
+			/* Fall through */
 		case EXPECT_HDR2:
 			edge_serial->rxHeader2 = *buffer;
 			++buffer;
@@ -1790,29 +1790,20 @@ static void process_rcvd_data(struct edgeport_serial *edge_serial,
 						edge_serial->rxHeader2, 0);
 				edge_serial->rxState = EXPECT_HDR1;
 				break;
-			} else {
-				edge_serial->rxPort =
-				    IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
-				edge_serial->rxBytesRemaining =
-				    IOSP_GET_HDR_DATA_LEN(
-						edge_serial->rxHeader1,
-						edge_serial->rxHeader2);
-				dev_dbg(dev, "%s - Data for Port %u Len %u\n",
-					__func__,
-					edge_serial->rxPort,
-					edge_serial->rxBytesRemaining);
-
-				/* ASSERT(DevExt->RxPort < DevExt->NumPorts);
-				 * ASSERT(DevExt->RxBytesRemaining <
-				 *		IOSP_MAX_DATA_LENGTH);
-				 */
-
-				if (bufferLength == 0) {
-					edge_serial->rxState = EXPECT_DATA;
-					break;
-				}
-				/* Else, drop through */
 			}
+
+			edge_serial->rxPort = IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
+			edge_serial->rxBytesRemaining = IOSP_GET_HDR_DATA_LEN(edge_serial->rxHeader1,
+									      edge_serial->rxHeader2);
+			dev_dbg(dev, "%s - Data for Port %u Len %u\n", __func__,
+				edge_serial->rxPort,
+				edge_serial->rxBytesRemaining);
+
+			if (bufferLength == 0) {
+				edge_serial->rxState = EXPECT_DATA;
+				break;
+			}
+			/* Fall through */
 		case EXPECT_DATA: /* Expect data */
 			if (bufferLength < edge_serial->rxBytesRemaining) {
 				rxLen = bufferLength;
diff --git a/drivers/usb/serial/iuu_phoenix.c b/drivers/usb/serial/iuu_phoenix.c
index 449e89db9cea..d5bff69b1769 100644
--- a/drivers/usb/serial/iuu_phoenix.c
+++ b/drivers/usb/serial/iuu_phoenix.c
@@ -942,9 +942,7 @@ static void iuu_close(struct usb_serial_port *port)
 
 static void iuu_init_termios(struct tty_struct *tty)
 {
-	tty->termios = tty_std_termios;
-	tty->termios.c_cflag = CLOCAL | CREAD | CS8 | B9600
-				| TIOCM_CTS | CSTOPB | PARENB;
+	tty->termios.c_cflag = B9600 | CS8 | CSTOPB | CREAD | PARENB | CLOCAL;
 	tty->termios.c_ispeed = 9600;
 	tty->termios.c_ospeed = 9600;
 	tty->termios.c_lflag = 0;
diff --git a/drivers/usb/serial/oti6858.c b/drivers/usb/serial/oti6858.c
index ae9cb15ee02d..38ae0fc826cc 100644
--- a/drivers/usb/serial/oti6858.c
+++ b/drivers/usb/serial/oti6858.c
@@ -393,10 +393,7 @@ static int oti6858_chars_in_buffer(struct tty_struct *tty)
 
 static void oti6858_init_termios(struct tty_struct *tty)
 {
-	tty->termios = tty_std_termios;
-	tty->termios.c_cflag = B38400 | CS8 | CREAD | HUPCL | CLOCAL;
-	tty->termios.c_ispeed = 38400;
-	tty->termios.c_ospeed = 38400;
+	tty_encode_baud_rate(tty, 38400, 38400);
 }
 
 static void oti6858_set_termios(struct tty_struct *tty,
diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
index bb3f9aa4a909..55122ac84518 100644
--- a/drivers/usb/serial/pl2303.c
+++ b/drivers/usb/serial/pl2303.c
@@ -145,6 +145,8 @@ MODULE_DEVICE_TABLE(usb, id_table);
 #define UART_OVERRUN_ERROR		0x40
 #define UART_CTS			0x80
 
+#define PL2303_FLOWCTRL_MASK		0xf0
+
 static void pl2303_set_break(struct usb_serial_port *port, bool enable);
 
 enum pl2303_type {
@@ -156,6 +158,7 @@ enum pl2303_type {
 struct pl2303_type_data {
 	speed_t max_baud_rate;
 	unsigned long quirks;
+	unsigned int no_autoxonxoff:1;
 };
 
 struct pl2303_serial_private {
@@ -173,11 +176,12 @@ struct pl2303_private {
 
 static const struct pl2303_type_data pl2303_type_data[TYPE_COUNT] = {
 	[TYPE_01] = {
-		.max_baud_rate =	1228800,
-		.quirks =		PL2303_QUIRK_LEGACY,
+		.max_baud_rate		= 1228800,
+		.quirks			= PL2303_QUIRK_LEGACY,
+		.no_autoxonxoff		= true,
 	},
 	[TYPE_HX] = {
-		.max_baud_rate =	12000000,
+		.max_baud_rate		= 12000000,
 	},
 };
 
@@ -223,6 +227,29 @@ static int pl2303_vendor_write(struct usb_serial *serial, u16 value, u16 index)
 	return 0;
 }
 
+static int pl2303_update_reg(struct usb_serial *serial, u8 reg, u8 mask, u8 val)
+{
+	int ret = 0;
+	u8 *buf;
+
+	buf = kmalloc(1, GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
+	ret = pl2303_vendor_read(serial, reg | 0x80, buf);
+	if (ret)
+		goto out_free;
+
+	*buf &= ~mask;
+	*buf |= val & mask;
+
+	ret = pl2303_vendor_write(serial, reg, *buf);
+out_free:
+	kfree(buf);
+
+	return ret;
+}
+
 static int pl2303_probe(struct usb_serial *serial,
 					const struct usb_device_id *id)
 {
@@ -552,6 +579,20 @@ static bool pl2303_termios_change(const struct ktermios *a, const struct ktermio
 	return tty_termios_hw_change(a, b) || ixon_change;
 }
 
+static bool pl2303_enable_xonxoff(struct tty_struct *tty, const struct pl2303_type_data *type)
+{
+	if (!I_IXON(tty) || I_IXANY(tty))
+		return false;
+
+	if (START_CHAR(tty) != 0x11 || STOP_CHAR(tty) != 0x13)
+		return false;
+
+	if (type->no_autoxonxoff)
+		return false;
+
+	return true;
+}
+
 static void pl2303_set_termios(struct tty_struct *tty,
 		struct usb_serial_port *port, struct ktermios *old_termios)
 {
@@ -678,14 +719,13 @@ static void pl2303_set_termios(struct tty_struct *tty,
 
 	if (C_CRTSCTS(tty)) {
 		if (spriv->quirks & PL2303_QUIRK_LEGACY)
-			pl2303_vendor_write(serial, 0x0, 0x41);
+			pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0x40);
 		else
-			pl2303_vendor_write(serial, 0x0, 0x61);
-	} else if (I_IXON(tty) && !I_IXANY(tty) && START_CHAR(tty) == 0x11 &&
-			STOP_CHAR(tty) == 0x13) {
-		pl2303_vendor_write(serial, 0x0, 0xc0);
+			pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0x60);
+	} else if (pl2303_enable_xonxoff(tty, spriv->type)) {
+		pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0xc0);
 	} else {
-		pl2303_vendor_write(serial, 0x0, 0x0);
+		pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0);
 	}
 
 	kfree(buf);
diff --git a/drivers/usb/serial/spcp8x5.c b/drivers/usb/serial/spcp8x5.c
index b42714855364..3bac55bd9bd9 100644
--- a/drivers/usb/serial/spcp8x5.c
+++ b/drivers/usb/serial/spcp8x5.c
@@ -281,10 +281,7 @@ static void spcp8x5_dtr_rts(struct usb_serial_port *port, int on)
 
 static void spcp8x5_init_termios(struct tty_struct *tty)
 {
-	tty->termios = tty_std_termios;
-	tty->termios.c_cflag = B115200 | CS8 | CREAD | HUPCL | CLOCAL;
-	tty->termios.c_ispeed = 115200;
-	tty->termios.c_ospeed = 115200;
+	tty_encode_baud_rate(tty, 115200, 115200);
 }
 
 static void spcp8x5_set_termios(struct tty_struct *tty,
diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c
index 7e89efbf2c28..676c296103a2 100644
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -164,9 +164,9 @@ void usb_serial_put(struct usb_serial *serial)
  * @driver: the driver (USB in our case)
  * @tty: the tty being created
  *
- * Create the termios objects for this tty.  We use the default
+ * Initialise the termios structure for this tty.  We use the default
  * USB serial settings but permit them to be overridden by
- * serial->type->init_termios.
+ * serial->type->init_termios on first open.
  *
  * This is the first place a new tty gets used.  Hence this is where we
  * acquire references to the usb_serial structure and the driver module,
@@ -178,6 +178,7 @@ static int serial_install(struct tty_driver *driver, struct tty_struct *tty)
 	int idx = tty->index;
 	struct usb_serial *serial;
 	struct usb_serial_port *port;
+	bool init_termios;
 	int retval = -ENODEV;
 
 	port = usb_serial_port_get_by_minor(idx);
@@ -192,14 +193,16 @@ static int serial_install(struct tty_driver *driver, struct tty_struct *tty)
 	if (retval)
 		goto error_get_interface;
 
+	init_termios = (driver->termios[idx] == NULL);
+
 	retval = tty_standard_install(driver, tty);
 	if (retval)
 		goto error_init_termios;
 
 	mutex_unlock(&serial->disc_mutex);
 
-	/* allow the driver to update the settings */
-	if (serial->type->init_termios)
+	/* allow the driver to update the initial settings */
+	if (init_termios && serial->type->init_termios)
 		serial->type->init_termios(tty);
 
 	tty->driver_data = port;
diff --git a/drivers/usb/storage/scsiglue.c b/drivers/usb/storage/scsiglue.c
index a73ea495d5a7..59190d88fa9f 100644
--- a/drivers/usb/storage/scsiglue.c
+++ b/drivers/usb/storage/scsiglue.c
@@ -65,6 +65,7 @@ static const char* host_info(struct Scsi_Host *host)
 static int slave_alloc (struct scsi_device *sdev)
 {
 	struct us_data *us = host_to_us(sdev->host);
+	int maxp;
 
 	/*
 	 * Set the INQUIRY transfer length to 36.  We don't use any of
@@ -74,20 +75,17 @@ static int slave_alloc (struct scsi_device *sdev)
 	sdev->inquiry_len = 36;
 
 	/*
-	 * USB has unusual DMA-alignment requirements: Although the
-	 * starting address of each scatter-gather element doesn't matter,
-	 * the length of each element except the last must be divisible
-	 * by the Bulk maxpacket value.  There's currently no way to
-	 * express this by block-layer constraints, so we'll cop out
-	 * and simply require addresses to be aligned at 512-byte
-	 * boundaries.  This is okay since most block I/O involves
-	 * hardware sectors that are multiples of 512 bytes in length,
-	 * and since host controllers up through USB 2.0 have maxpacket
-	 * values no larger than 512.
-	 *
-	 * But it doesn't suffice for Wireless USB, where Bulk maxpacket
-	 * values can be as large as 2048.  To make that work properly
-	 * will require changes to the block layer.
+	 * USB has unusual scatter-gather requirements: the length of each
+	 * scatterlist element except the last must be divisible by the
+	 * Bulk maxpacket value.  Fortunately this value is always a
+	 * power of 2.  Inform the block layer about this requirement.
+	 */
+	maxp = usb_maxpacket(us->pusb_dev, us->recv_bulk_pipe, 0);
+	blk_queue_virt_boundary(sdev->request_queue, maxp - 1);
+
+	/*
+	 * Some host controllers may have alignment requirements.
+	 * We'll play it safe by requiring 512-byte alignment always.
 	 */
 	blk_queue_update_dma_alignment(sdev->request_queue, (512 - 1));
 
diff --git a/drivers/usb/storage/sierra_ms.c b/drivers/usb/storage/sierra_ms.c
index 6ac60abd2e15..e605cbc3d8bf 100644
--- a/drivers/usb/storage/sierra_ms.c
+++ b/drivers/usb/storage/sierra_ms.c
@@ -194,8 +194,6 @@ int sierra_ms_init(struct us_data *us)
 		kfree(swocInfo);
 	}
 complete:
-	result = device_create_file(&us->pusb_intf->dev, &dev_attr_truinst);
-
-	return 0;
+	return device_create_file(&us->pusb_intf->dev, &dev_attr_truinst);
 }
 
diff --git a/drivers/usb/storage/uas.c b/drivers/usb/storage/uas.c
index a6d68191c861..047c5922618f 100644
--- a/drivers/usb/storage/uas.c
+++ b/drivers/usb/storage/uas.c
@@ -789,24 +789,33 @@ static int uas_slave_alloc(struct scsi_device *sdev)
 {
 	struct uas_dev_info *devinfo =
 		(struct uas_dev_info *)sdev->host->hostdata;
+	int maxp;
 
 	sdev->hostdata = devinfo;
 
 	/*
-	 * USB has unusual DMA-alignment requirements: Although the
-	 * starting address of each scatter-gather element doesn't matter,
-	 * the length of each element except the last must be divisible
-	 * by the Bulk maxpacket value.  There's currently no way to
-	 * express this by block-layer constraints, so we'll cop out
-	 * and simply require addresses to be aligned at 512-byte
-	 * boundaries.  This is okay since most block I/O involves
-	 * hardware sectors that are multiples of 512 bytes in length,
-	 * and since host controllers up through USB 2.0 have maxpacket
-	 * values no larger than 512.
+	 * We have two requirements here. We must satisfy the requirements
+	 * of the physical HC and the demands of the protocol, as we
+	 * definitely want no additional memory allocation in this path
+	 * ruling out using bounce buffers.
 	 *
-	 * But it doesn't suffice for Wireless USB, where Bulk maxpacket
-	 * values can be as large as 2048.  To make that work properly
-	 * will require changes to the block layer.
+	 * For a transmission on USB to continue we must never send
+	 * a package that is smaller than maxpacket. Hence the length of each
+         * scatterlist element except the last must be divisible by the
+         * Bulk maxpacket value.
+	 * If the HC does not ensure that through SG,
+	 * the upper layer must do that. We must assume nothing
+	 * about the capabilities off the HC, so we use the most
+	 * pessimistic requirement.
+	 */
+
+	maxp = usb_maxpacket(devinfo->udev, devinfo->data_in_pipe, 0);
+	blk_queue_virt_boundary(sdev->request_queue, maxp - 1);
+
+	/*
+	 * The protocol has no requirements on alignment in the strict sense.
+	 * Controllers may or may not have alignment restrictions.
+	 * As this is not exported, we use an extremely conservative guess.
 	 */
 	blk_queue_update_dma_alignment(sdev->request_queue, (512 - 1));
 
diff --git a/drivers/usb/typec/altmodes/Kconfig b/drivers/usb/typec/altmodes/Kconfig
index ef2226eb7a33..187690fd1a5b 100644
--- a/drivers/usb/typec/altmodes/Kconfig
+++ b/drivers/usb/typec/altmodes/Kconfig
@@ -12,4 +12,14 @@ config TYPEC_DP_ALTMODE
 	  To compile this driver as a module, choose M here: the
 	  module will be called typec_displayport.
 
+config TYPEC_NVIDIA_ALTMODE
+	tristate "NVIDIA Alternate Mode driver"
+	depends on TYPEC_DP_ALTMODE
+	help
+	  Latest NVIDIA GPUs support VirtualLink devices. Select this
+	  to enable support for VirtualLink devices with NVIDIA GPUs.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called typec_displayport.
+
 endmenu
diff --git a/drivers/usb/typec/altmodes/Makefile b/drivers/usb/typec/altmodes/Makefile
index eda8456f1c92..45717548b396 100644
--- a/drivers/usb/typec/altmodes/Makefile
+++ b/drivers/usb/typec/altmodes/Makefile
@@ -2,3 +2,5 @@
 
 obj-$(CONFIG_TYPEC_DP_ALTMODE)		+= typec_displayport.o
 typec_displayport-y			:= displayport.o
+obj-$(CONFIG_TYPEC_NVIDIA_ALTMODE)	+= typec_nvidia.o
+typec_nvidia-y				:= nvidia.o
diff --git a/drivers/usb/typec/altmodes/displayport.c b/drivers/usb/typec/altmodes/displayport.c
index 610d790bc9be..4092248a5936 100644
--- a/drivers/usb/typec/altmodes/displayport.c
+++ b/drivers/usb/typec/altmodes/displayport.c
@@ -14,7 +14,7 @@
 #include <linux/usb/pd_vdo.h>
 #include <linux/usb/typec_dp.h>
 
-#define DP_HEADER(cmd)			(VDO(USB_TYPEC_DP_SID, 1, cmd) | \
+#define DP_HEADER(_dp, cmd)		(VDO((_dp)->alt->svid, 1, cmd) | \
 					 VDO_OPOS(USB_TYPEC_DP_MODE))
 
 enum {
@@ -100,7 +100,7 @@ static int dp_altmode_configure(struct dp_altmode *dp, u8 con)
 		if (dp->data.status & DP_STATUS_PREFER_MULTI_FUNC &&
 		    pin_assign & DP_PIN_ASSIGN_MULTI_FUNC_MASK)
 			pin_assign &= DP_PIN_ASSIGN_MULTI_FUNC_MASK;
-		else
+		else if (pin_assign & DP_PIN_ASSIGN_DP_ONLY_MASK)
 			pin_assign &= DP_PIN_ASSIGN_DP_ONLY_MASK;
 
 		if (!pin_assign)
@@ -155,7 +155,7 @@ static int dp_altmode_configured(struct dp_altmode *dp)
 
 static int dp_altmode_configure_vdm(struct dp_altmode *dp, u32 conf)
 {
-	u32 header = DP_HEADER(DP_CMD_CONFIGURE);
+	u32 header = DP_HEADER(dp, DP_CMD_CONFIGURE);
 	int ret;
 
 	ret = typec_altmode_notify(dp->alt, TYPEC_STATE_SAFE, &dp->data);
@@ -193,7 +193,7 @@ static void dp_altmode_work(struct work_struct *work)
 			dev_err(&dp->alt->dev, "failed to enter mode\n");
 		break;
 	case DP_STATE_UPDATE:
-		header = DP_HEADER(DP_CMD_STATUS_UPDATE);
+		header = DP_HEADER(dp, DP_CMD_STATUS_UPDATE);
 		vdo = 1;
 		ret = typec_altmode_vdm(dp->alt, header, &vdo, 2);
 		if (ret)
@@ -507,7 +507,7 @@ static const struct attribute_group dp_altmode_group = {
 	.attrs = dp_altmode_attrs,
 };
 
-static int dp_altmode_probe(struct typec_altmode *alt)
+int dp_altmode_probe(struct typec_altmode *alt)
 {
 	const struct typec_altmode *port = typec_altmode_get_partner(alt);
 	struct dp_altmode *dp;
@@ -545,14 +545,16 @@ static int dp_altmode_probe(struct typec_altmode *alt)
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(dp_altmode_probe);
 
-static void dp_altmode_remove(struct typec_altmode *alt)
+void dp_altmode_remove(struct typec_altmode *alt)
 {
 	struct dp_altmode *dp = typec_altmode_get_drvdata(alt);
 
 	sysfs_remove_group(&alt->dev.kobj, &dp_altmode_group);
 	cancel_work_sync(&dp->work);
 }
+EXPORT_SYMBOL_GPL(dp_altmode_remove);
 
 static const struct typec_device_id dp_typec_id[] = {
 	{ USB_TYPEC_DP_SID, USB_TYPEC_DP_MODE },
diff --git a/drivers/usb/typec/altmodes/displayport.h b/drivers/usb/typec/altmodes/displayport.h
new file mode 100644
index 000000000000..e120364da9fd
--- /dev/null
+++ b/drivers/usb/typec/altmodes/displayport.h
@@ -0,0 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#if IS_ENABLED(CONFIG_TYPEC_DP_ALTMODE)
+int dp_altmode_probe(struct typec_altmode *alt);
+void dp_altmode_remove(struct typec_altmode *alt);
+#else
+int dp_altmode_probe(struct typec_altmode *alt) { return -ENOTSUPP; }
+void dp_altmode_remove(struct typec_altmode *alt) { }
+#endif /* CONFIG_TYPEC_DP_ALTMODE */
diff --git a/drivers/usb/typec/altmodes/nvidia.c b/drivers/usb/typec/altmodes/nvidia.c
new file mode 100644
index 000000000000..c36769736405
--- /dev/null
+++ b/drivers/usb/typec/altmodes/nvidia.c
@@ -0,0 +1,44 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2019 NVIDIA Corporation. All rights reserved.
+ *
+ * NVIDIA USB Type-C Alt Mode Driver
+ */
+#include <linux/module.h>
+#include <linux/usb/typec_altmode.h>
+#include <linux/usb/typec_dp.h>
+#include "displayport.h"
+
+static int nvidia_altmode_probe(struct typec_altmode *alt)
+{
+	if (alt->svid == USB_TYPEC_NVIDIA_VLINK_SID)
+		return dp_altmode_probe(alt);
+	else
+		return -ENOTSUPP;
+}
+
+static void nvidia_altmode_remove(struct typec_altmode *alt)
+{
+	if (alt->svid == USB_TYPEC_NVIDIA_VLINK_SID)
+		dp_altmode_remove(alt);
+}
+
+static const struct typec_device_id nvidia_typec_id[] = {
+	{ USB_TYPEC_NVIDIA_VLINK_SID, TYPEC_ANY_MODE },
+	{ },
+};
+MODULE_DEVICE_TABLE(typec, nvidia_typec_id);
+
+static struct typec_altmode_driver nvidia_altmode_driver = {
+	.id_table = nvidia_typec_id,
+	.probe = nvidia_altmode_probe,
+	.remove = nvidia_altmode_remove,
+	.driver = {
+		.name = "typec_nvidia",
+		.owner = THIS_MODULE,
+	},
+};
+module_typec_altmode_driver(nvidia_altmode_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("NVIDIA USB Type-C Alt Mode Driver");
diff --git a/drivers/usb/typec/mux/pi3usb30532.c b/drivers/usb/typec/mux/pi3usb30532.c
index 64eb5983e17a..9294e85fd34b 100644
--- a/drivers/usb/typec/mux/pi3usb30532.c
+++ b/drivers/usb/typec/mux/pi3usb30532.c
@@ -84,7 +84,8 @@ static int pi3usb30532_mux_set(struct typec_mux *mux, int state)
 
 	switch (state) {
 	case TYPEC_STATE_SAFE:
-		new_conf = PI3USB30532_CONF_OPEN;
+		new_conf = (new_conf & PI3USB30532_CONF_SWAP) |
+			   PI3USB30532_CONF_OPEN;
 		break;
 	case TYPEC_STATE_USB:
 		new_conf = (new_conf & PI3USB30532_CONF_SWAP) |
diff --git a/drivers/usb/typec/tcpm/fusb302.c b/drivers/usb/typec/tcpm/fusb302.c
index e9344997329c..7302f7501ec9 100644
--- a/drivers/usb/typec/tcpm/fusb302.c
+++ b/drivers/usb/typec/tcpm/fusb302.c
@@ -23,6 +23,7 @@
 #include <linux/sched/clock.h>
 #include <linux/seq_file.h>
 #include <linux/slab.h>
+#include <linux/spinlock.h>
 #include <linux/string.h>
 #include <linux/types.h>
 #include <linux/usb/typec.h>
@@ -78,6 +79,10 @@ struct fusb302_chip {
 
 	struct regulator *vbus;
 
+	spinlock_t irq_lock;
+	struct work_struct irq_work;
+	bool irq_suspended;
+	bool irq_while_suspended;
 	int gpio_int_n;
 	int gpio_int_n_irq;
 	struct extcon_dev *extcon;
@@ -85,9 +90,6 @@ struct fusb302_chip {
 	struct workqueue_struct *wq;
 	struct delayed_work bc_lvl_handler;
 
-	atomic_t pm_suspend;
-	atomic_t i2c_busy;
-
 	/* lock for sharing chip states */
 	struct mutex lock;
 
@@ -99,7 +101,6 @@ struct fusb302_chip {
 	bool intr_comp_chng;
 
 	/* port status */
-	bool pull_up;
 	bool vconn_on;
 	bool vbus_on;
 	bool charge_on;
@@ -124,13 +125,13 @@ struct fusb302_chip {
  */
 
 #ifdef CONFIG_DEBUG_FS
-
 static bool fusb302_log_full(struct fusb302_chip *chip)
 {
 	return chip->logbuffer_tail ==
 		(chip->logbuffer_head + 1) % LOG_BUFFER_ENTRIES;
 }
 
+__printf(2, 0)
 static void _fusb302_log(struct fusb302_chip *chip, const char *fmt,
 			 va_list args)
 {
@@ -234,43 +235,15 @@ static void fusb302_debugfs_exit(const struct fusb302_chip *chip) { }
 
 #endif
 
-#define FUSB302_RESUME_RETRY 10
-#define FUSB302_RESUME_RETRY_SLEEP 50
-
-static bool fusb302_is_suspended(struct fusb302_chip *chip)
-{
-	int retry_cnt;
-
-	for (retry_cnt = 0; retry_cnt < FUSB302_RESUME_RETRY; retry_cnt++) {
-		if (atomic_read(&chip->pm_suspend)) {
-			dev_err(chip->dev, "i2c: pm suspend, retry %d/%d\n",
-				retry_cnt + 1, FUSB302_RESUME_RETRY);
-			msleep(FUSB302_RESUME_RETRY_SLEEP);
-		} else {
-			return false;
-		}
-	}
-
-	return true;
-}
-
 static int fusb302_i2c_write(struct fusb302_chip *chip,
 			     u8 address, u8 data)
 {
 	int ret = 0;
 
-	atomic_set(&chip->i2c_busy, 1);
-
-	if (fusb302_is_suspended(chip)) {
-		atomic_set(&chip->i2c_busy, 0);
-		return -ETIMEDOUT;
-	}
-
 	ret = i2c_smbus_write_byte_data(chip->i2c_client, address, data);
 	if (ret < 0)
 		fusb302_log(chip, "cannot write 0x%02x to 0x%02x, ret=%d",
 			    data, address, ret);
-	atomic_set(&chip->i2c_busy, 0);
 
 	return ret;
 }
@@ -282,19 +255,12 @@ static int fusb302_i2c_block_write(struct fusb302_chip *chip, u8 address,
 
 	if (length <= 0)
 		return ret;
-	atomic_set(&chip->i2c_busy, 1);
-
-	if (fusb302_is_suspended(chip)) {
-		atomic_set(&chip->i2c_busy, 0);
-		return -ETIMEDOUT;
-	}
 
 	ret = i2c_smbus_write_i2c_block_data(chip->i2c_client, address,
 					     length, data);
 	if (ret < 0)
 		fusb302_log(chip, "cannot block write 0x%02x, len=%d, ret=%d",
 			    address, length, ret);
-	atomic_set(&chip->i2c_busy, 0);
 
 	return ret;
 }
@@ -304,18 +270,10 @@ static int fusb302_i2c_read(struct fusb302_chip *chip,
 {
 	int ret = 0;
 
-	atomic_set(&chip->i2c_busy, 1);
-
-	if (fusb302_is_suspended(chip)) {
-		atomic_set(&chip->i2c_busy, 0);
-		return -ETIMEDOUT;
-	}
-
 	ret = i2c_smbus_read_byte_data(chip->i2c_client, address);
 	*data = (u8)ret;
 	if (ret < 0)
 		fusb302_log(chip, "cannot read %02x, ret=%d", address, ret);
-	atomic_set(&chip->i2c_busy, 0);
 
 	return ret;
 }
@@ -327,12 +285,6 @@ static int fusb302_i2c_block_read(struct fusb302_chip *chip, u8 address,
 
 	if (length <= 0)
 		return ret;
-	atomic_set(&chip->i2c_busy, 1);
-
-	if (fusb302_is_suspended(chip)) {
-		atomic_set(&chip->i2c_busy, 0);
-		return -ETIMEDOUT;
-	}
 
 	ret = i2c_smbus_read_i2c_block_data(chip->i2c_client, address,
 					    length, data);
@@ -348,8 +300,6 @@ static int fusb302_i2c_block_read(struct fusb302_chip *chip, u8 address,
 	}
 
 done:
-	atomic_set(&chip->i2c_busy, 0);
-
 	return ret;
 }
 
@@ -519,32 +469,6 @@ static int tcpm_get_current_limit(struct tcpc_dev *dev)
 	return current_limit;
 }
 
-static int fusb302_set_cc_pull(struct fusb302_chip *chip,
-			       bool pull_up, bool pull_down)
-{
-	int ret = 0;
-	u8 data = 0x00;
-	u8 mask = FUSB_REG_SWITCHES0_CC1_PU_EN |
-		  FUSB_REG_SWITCHES0_CC2_PU_EN |
-		  FUSB_REG_SWITCHES0_CC1_PD_EN |
-		  FUSB_REG_SWITCHES0_CC2_PD_EN;
-
-	if (pull_up)
-		data |= (chip->cc_polarity == TYPEC_POLARITY_CC1) ?
-			FUSB_REG_SWITCHES0_CC1_PU_EN :
-			FUSB_REG_SWITCHES0_CC2_PU_EN;
-	if (pull_down)
-		data |= FUSB_REG_SWITCHES0_CC1_PD_EN |
-			FUSB_REG_SWITCHES0_CC2_PD_EN;
-	ret = fusb302_i2c_mask_write(chip, FUSB_REG_SWITCHES0,
-				     mask, data);
-	if (ret < 0)
-		return ret;
-	chip->pull_up = pull_up;
-
-	return ret;
-}
-
 static int fusb302_set_src_current(struct fusb302_chip *chip,
 				   enum src_current_status status)
 {
@@ -634,6 +558,8 @@ static int fusb302_set_toggling(struct fusb302_chip *chip,
 			return ret;
 		chip->intr_togdone = false;
 	} else {
+		/* Datasheet says vconn MUST be off when toggling */
+		WARN(chip->vconn_on, "Vconn is on during toggle start");
 		/* unmask TOGDONE interrupt */
 		ret = fusb302_i2c_clear_bits(chip, FUSB_REG_MASKA,
 					     FUSB_REG_MASKA_TOGDONE);
@@ -676,26 +602,27 @@ static int tcpm_set_cc(struct tcpc_dev *dev, enum typec_cc_status cc)
 {
 	struct fusb302_chip *chip = container_of(dev, struct fusb302_chip,
 						 tcpc_dev);
+	u8 switches0_mask = FUSB_REG_SWITCHES0_CC1_PU_EN |
+			    FUSB_REG_SWITCHES0_CC2_PU_EN |
+			    FUSB_REG_SWITCHES0_CC1_PD_EN |
+			    FUSB_REG_SWITCHES0_CC2_PD_EN;
+	u8 rd_mda, switches0_data = 0x00;
 	int ret = 0;
-	bool pull_up, pull_down;
-	u8 rd_mda;
-	enum toggling_mode mode;
 
 	mutex_lock(&chip->lock);
 	switch (cc) {
 	case TYPEC_CC_OPEN:
-		pull_up = false;
-		pull_down = false;
 		break;
 	case TYPEC_CC_RD:
-		pull_up = false;
-		pull_down = true;
+		switches0_data |= FUSB_REG_SWITCHES0_CC1_PD_EN |
+				  FUSB_REG_SWITCHES0_CC2_PD_EN;
 		break;
 	case TYPEC_CC_RP_DEF:
 	case TYPEC_CC_RP_1_5:
 	case TYPEC_CC_RP_3_0:
-		pull_up = true;
-		pull_down = false;
+		switches0_data |= (chip->cc_polarity == TYPEC_POLARITY_CC1) ?
+				  FUSB_REG_SWITCHES0_CC1_PU_EN :
+				  FUSB_REG_SWITCHES0_CC2_PU_EN;
 		break;
 	default:
 		fusb302_log(chip, "unsupported cc value %s",
@@ -703,34 +630,38 @@ static int tcpm_set_cc(struct tcpc_dev *dev, enum typec_cc_status cc)
 		ret = -EINVAL;
 		goto done;
 	}
+
+	fusb302_log(chip, "cc := %s", typec_cc_status_name[cc]);
+
 	ret = fusb302_set_toggling(chip, TOGGLING_MODE_OFF);
 	if (ret < 0) {
-		fusb302_log(chip, "cannot stop toggling, ret=%d", ret);
+		fusb302_log(chip, "cannot set toggling mode, ret=%d", ret);
 		goto done;
 	}
-	ret = fusb302_set_cc_pull(chip, pull_up, pull_down);
+
+	ret = fusb302_i2c_mask_write(chip, FUSB_REG_SWITCHES0,
+				     switches0_mask, switches0_data);
 	if (ret < 0) {
-		fusb302_log(chip,
-			    "cannot set cc pulling up %s, down %s, ret = %d",
-			    pull_up ? "True" : "False",
-			    pull_down ? "True" : "False",
-			    ret);
+		fusb302_log(chip, "cannot set pull-up/-down, ret = %d", ret);
 		goto done;
 	}
 	/* reset the cc status */
 	chip->cc1 = TYPEC_CC_OPEN;
 	chip->cc2 = TYPEC_CC_OPEN;
+
 	/* adjust current for SRC */
-	if (pull_up) {
-		ret = fusb302_set_src_current(chip, cc_src_current[cc]);
-		if (ret < 0) {
-			fusb302_log(chip, "cannot set src current %s, ret=%d",
-				    typec_cc_status_name[cc], ret);
-			goto done;
-		}
+	ret = fusb302_set_src_current(chip, cc_src_current[cc]);
+	if (ret < 0) {
+		fusb302_log(chip, "cannot set src current %s, ret=%d",
+			    typec_cc_status_name[cc], ret);
+		goto done;
 	}
+
 	/* enable/disable interrupts, BC_LVL for SNK and COMP_CHNG for SRC */
-	if (pull_up) {
+	switch (cc) {
+	case TYPEC_CC_RP_DEF:
+	case TYPEC_CC_RP_1_5:
+	case TYPEC_CC_RP_3_0:
 		rd_mda = rd_mda_value[cc_src_current[cc]];
 		ret = fusb302_i2c_write(chip, FUSB_REG_MEASURE, rd_mda);
 		if (ret < 0) {
@@ -748,10 +679,9 @@ static int tcpm_set_cc(struct tcpc_dev *dev, enum typec_cc_status cc)
 				    ret);
 			goto done;
 		}
-		chip->intr_bc_lvl = false;
 		chip->intr_comp_chng = true;
-	}
-	if (pull_down) {
+		break;
+	case TYPEC_CC_RD:
 		ret = fusb302_i2c_mask_write(chip, FUSB_REG_MASK,
 					     FUSB_REG_MASK_BC_LVL |
 					     FUSB_REG_MASK_COMP_CHNG,
@@ -762,32 +692,10 @@ static int tcpm_set_cc(struct tcpc_dev *dev, enum typec_cc_status cc)
 			goto done;
 		}
 		chip->intr_bc_lvl = true;
-		chip->intr_comp_chng = false;
-	}
-	fusb302_log(chip, "cc := %s", typec_cc_status_name[cc]);
-
-	/* Enable detection for fixed SNK or SRC only roles */
-	switch (cc) {
-	case TYPEC_CC_RD:
-		mode = TOGGLING_MODE_SNK;
-		break;
-	case TYPEC_CC_RP_DEF:
-	case TYPEC_CC_RP_1_5:
-	case TYPEC_CC_RP_3_0:
-		mode = TOGGLING_MODE_SRC;
 		break;
 	default:
-		mode = TOGGLING_MODE_OFF;
 		break;
 	}
-
-	if (mode != TOGGLING_MODE_OFF) {
-		ret = fusb302_set_toggling(chip, mode);
-		if (ret < 0)
-			fusb302_log(chip,
-				    "cannot set fixed role toggling mode, ret=%d",
-				    ret);
-	}
 done:
 	mutex_unlock(&chip->lock);
 
@@ -1005,13 +913,27 @@ done:
 	return ret;
 }
 
-static int tcpm_start_drp_toggling(struct tcpc_dev *dev,
-				   enum typec_cc_status cc)
+static int tcpm_start_toggling(struct tcpc_dev *dev,
+			       enum typec_port_type port_type,
+			       enum typec_cc_status cc)
 {
 	struct fusb302_chip *chip = container_of(dev, struct fusb302_chip,
 						 tcpc_dev);
+	enum toggling_mode mode = TOGGLING_MODE_OFF;
 	int ret = 0;
 
+	switch (port_type) {
+	case TYPEC_PORT_SRC:
+		mode = TOGGLING_MODE_SRC;
+		break;
+	case TYPEC_PORT_SNK:
+		mode = TOGGLING_MODE_SNK;
+		break;
+	case TYPEC_PORT_DRP:
+		mode = TOGGLING_MODE_DRP;
+		break;
+	}
+
 	mutex_lock(&chip->lock);
 	ret = fusb302_set_src_current(chip, cc_src_current[cc]);
 	if (ret < 0) {
@@ -1019,7 +941,7 @@ static int tcpm_start_drp_toggling(struct tcpc_dev *dev,
 			    typec_cc_status_name[cc], ret);
 		goto done;
 	}
-	ret = fusb302_set_toggling(chip, TOGGLING_MODE_DRP);
+	ret = fusb302_set_toggling(chip, mode);
 	if (ret < 0) {
 		fusb302_log(chip,
 			    "unable to start drp toggling, ret=%d", ret);
@@ -1217,7 +1139,7 @@ static void init_tcpc_dev(struct tcpc_dev *fusb302_tcpc_dev)
 	fusb302_tcpc_dev->set_vbus = tcpm_set_vbus;
 	fusb302_tcpc_dev->set_pd_rx = tcpm_set_pd_rx;
 	fusb302_tcpc_dev->set_roles = tcpm_set_roles;
-	fusb302_tcpc_dev->start_drp_toggling = tcpm_start_drp_toggling;
+	fusb302_tcpc_dev->start_toggling = tcpm_start_toggling;
 	fusb302_tcpc_dev->pd_transmit = tcpm_pd_transmit;
 }
 
@@ -1226,38 +1148,36 @@ static const char * const cc_polarity_name[] = {
 	[TYPEC_POLARITY_CC2]	= "Polarity_CC2",
 };
 
-static int fusb302_set_cc_polarity(struct fusb302_chip *chip,
-				   enum typec_cc_polarity cc_polarity)
+static int fusb302_set_cc_polarity_and_pull(struct fusb302_chip *chip,
+					    enum typec_cc_polarity cc_polarity,
+					    bool pull_up, bool pull_down)
 {
 	int ret = 0;
-	u8 switches0_mask = FUSB_REG_SWITCHES0_CC1_PU_EN |
-			    FUSB_REG_SWITCHES0_CC2_PU_EN |
-			    FUSB_REG_SWITCHES0_VCONN_CC1 |
-			    FUSB_REG_SWITCHES0_VCONN_CC2 |
-			    FUSB_REG_SWITCHES0_MEAS_CC1 |
-			    FUSB_REG_SWITCHES0_MEAS_CC2;
 	u8 switches0_data = 0x00;
 	u8 switches1_mask = FUSB_REG_SWITCHES1_TXCC1_EN |
 			    FUSB_REG_SWITCHES1_TXCC2_EN;
 	u8 switches1_data = 0x00;
 
+	if (pull_down)
+		switches0_data |= FUSB_REG_SWITCHES0_CC1_PD_EN |
+				  FUSB_REG_SWITCHES0_CC2_PD_EN;
+
 	if (cc_polarity == TYPEC_POLARITY_CC1) {
-		switches0_data = FUSB_REG_SWITCHES0_MEAS_CC1;
+		switches0_data |= FUSB_REG_SWITCHES0_MEAS_CC1;
 		if (chip->vconn_on)
 			switches0_data |= FUSB_REG_SWITCHES0_VCONN_CC2;
-		if (chip->pull_up)
+		if (pull_up)
 			switches0_data |= FUSB_REG_SWITCHES0_CC1_PU_EN;
 		switches1_data = FUSB_REG_SWITCHES1_TXCC1_EN;
 	} else {
-		switches0_data = FUSB_REG_SWITCHES0_MEAS_CC2;
+		switches0_data |= FUSB_REG_SWITCHES0_MEAS_CC2;
 		if (chip->vconn_on)
 			switches0_data |= FUSB_REG_SWITCHES0_VCONN_CC1;
-		if (chip->pull_up)
+		if (pull_up)
 			switches0_data |= FUSB_REG_SWITCHES0_CC2_PU_EN;
 		switches1_data = FUSB_REG_SWITCHES1_TXCC2_EN;
 	}
-	ret = fusb302_i2c_mask_write(chip, FUSB_REG_SWITCHES0,
-				     switches0_mask, switches0_data);
+	ret = fusb302_i2c_write(chip, FUSB_REG_SWITCHES0, switches0_data);
 	if (ret < 0)
 		return ret;
 	ret = fusb302_i2c_mask_write(chip, FUSB_REG_SWITCHES1,
@@ -1278,16 +1198,10 @@ static int fusb302_handle_togdone_snk(struct fusb302_chip *chip,
 	enum typec_cc_polarity cc_polarity;
 	enum typec_cc_status cc_status_active, cc1, cc2;
 
-	/* set pull_up, pull_down */
-	ret = fusb302_set_cc_pull(chip, false, true);
-	if (ret < 0) {
-		fusb302_log(chip, "cannot set cc to pull down, ret=%d", ret);
-		return ret;
-	}
-	/* set polarity */
+	/* set polarity and pull_up, pull_down */
 	cc_polarity = (togdone_result == FUSB_REG_STATUS1A_TOGSS_SNK1) ?
 		      TYPEC_POLARITY_CC1 : TYPEC_POLARITY_CC2;
-	ret = fusb302_set_cc_polarity(chip, cc_polarity);
+	ret = fusb302_set_cc_polarity_and_pull(chip, cc_polarity, false, true);
 	if (ret < 0) {
 		fusb302_log(chip, "cannot set cc polarity %s, ret=%d",
 			    cc_polarity_name[cc_polarity], ret);
@@ -1337,6 +1251,62 @@ static int fusb302_handle_togdone_snk(struct fusb302_chip *chip,
 	return ret;
 }
 
+/* On error returns < 0, otherwise a typec_cc_status value */
+static int fusb302_get_src_cc_status(struct fusb302_chip *chip,
+				     enum typec_cc_polarity cc_polarity,
+				     enum typec_cc_status *cc)
+{
+	u8 ra_mda = ra_mda_value[chip->src_current_status];
+	u8 rd_mda = rd_mda_value[chip->src_current_status];
+	u8 switches0_data, status0;
+	int ret;
+
+	/* Step 1: Set switches so that we measure the right CC pin */
+	switches0_data = (cc_polarity == TYPEC_POLARITY_CC1) ?
+		FUSB_REG_SWITCHES0_CC1_PU_EN | FUSB_REG_SWITCHES0_MEAS_CC1 :
+		FUSB_REG_SWITCHES0_CC2_PU_EN | FUSB_REG_SWITCHES0_MEAS_CC2;
+	ret = fusb302_i2c_write(chip, FUSB_REG_SWITCHES0, switches0_data);
+	if (ret < 0)
+		return ret;
+
+	fusb302_i2c_read(chip, FUSB_REG_SWITCHES0, &status0);
+	fusb302_log(chip, "get_src_cc_status switches: 0x%0x", status0);
+
+	/* Step 2: Set compararator volt to differentiate between Open and Rd */
+	ret = fusb302_i2c_write(chip, FUSB_REG_MEASURE, rd_mda);
+	if (ret < 0)
+		return ret;
+
+	usleep_range(50, 100);
+	ret = fusb302_i2c_read(chip, FUSB_REG_STATUS0, &status0);
+	if (ret < 0)
+		return ret;
+
+	fusb302_log(chip, "get_src_cc_status rd_mda status0: 0x%0x", status0);
+	if (status0 & FUSB_REG_STATUS0_COMP) {
+		*cc = TYPEC_CC_OPEN;
+		return 0;
+	}
+
+	/* Step 3: Set compararator input to differentiate between Rd and Ra. */
+	ret = fusb302_i2c_write(chip, FUSB_REG_MEASURE, ra_mda);
+	if (ret < 0)
+		return ret;
+
+	usleep_range(50, 100);
+	ret = fusb302_i2c_read(chip, FUSB_REG_STATUS0, &status0);
+	if (ret < 0)
+		return ret;
+
+	fusb302_log(chip, "get_src_cc_status ra_mda status0: 0x%0x", status0);
+	if (status0 & FUSB_REG_STATUS0_COMP)
+		*cc = TYPEC_CC_RD;
+	else
+		*cc = TYPEC_CC_RA;
+
+	return 0;
+}
+
 static int fusb302_handle_togdone_src(struct fusb302_chip *chip,
 				      u8 togdone_result)
 {
@@ -1347,77 +1317,62 @@ static int fusb302_handle_togdone_src(struct fusb302_chip *chip,
 	 * - set I_COMP interrupt on
 	 */
 	int ret = 0;
-	u8 status0;
-	u8 ra_mda = ra_mda_value[chip->src_current_status];
 	u8 rd_mda = rd_mda_value[chip->src_current_status];
-	bool ra_comp, rd_comp;
+	enum toggling_mode toggling_mode = chip->toggling_mode;
 	enum typec_cc_polarity cc_polarity;
-	enum typec_cc_status cc_status_active, cc1, cc2;
+	enum typec_cc_status cc1, cc2;
 
-	/* set pull_up, pull_down */
-	ret = fusb302_set_cc_pull(chip, true, false);
-	if (ret < 0) {
-		fusb302_log(chip, "cannot set cc to pull up, ret=%d", ret);
+	/*
+	 * The toggle-engine will stop in a src state if it sees either Ra or
+	 * Rd. Determine the status for both CC pins, starting with the one
+	 * where toggling stopped, as that is where the switches point now.
+	 */
+	if (togdone_result == FUSB_REG_STATUS1A_TOGSS_SRC1)
+		ret = fusb302_get_src_cc_status(chip, TYPEC_POLARITY_CC1, &cc1);
+	else
+		ret = fusb302_get_src_cc_status(chip, TYPEC_POLARITY_CC2, &cc2);
+	if (ret < 0)
 		return ret;
-	}
-	/* set polarity */
-	cc_polarity = (togdone_result == FUSB_REG_STATUS1A_TOGSS_SRC1) ?
-		      TYPEC_POLARITY_CC1 : TYPEC_POLARITY_CC2;
-	ret = fusb302_set_cc_polarity(chip, cc_polarity);
+	/* we must turn off toggling before we can measure the other pin */
+	ret = fusb302_set_toggling(chip, TOGGLING_MODE_OFF);
 	if (ret < 0) {
-		fusb302_log(chip, "cannot set cc polarity %s, ret=%d",
-			    cc_polarity_name[cc_polarity], ret);
+		fusb302_log(chip, "cannot set toggling mode off, ret=%d", ret);
 		return ret;
 	}
-	/* fusb302_set_cc_polarity() has set the correct measure block */
-	ret = fusb302_i2c_write(chip, FUSB_REG_MEASURE, rd_mda);
-	if (ret < 0)
-		return ret;
-	usleep_range(50, 100);
-	ret = fusb302_i2c_read(chip, FUSB_REG_STATUS0, &status0);
+	/* get the status of the other pin */
+	if (togdone_result == FUSB_REG_STATUS1A_TOGSS_SRC1)
+		ret = fusb302_get_src_cc_status(chip, TYPEC_POLARITY_CC2, &cc2);
+	else
+		ret = fusb302_get_src_cc_status(chip, TYPEC_POLARITY_CC1, &cc1);
 	if (ret < 0)
 		return ret;
-	rd_comp = !!(status0 & FUSB_REG_STATUS0_COMP);
-	if (!rd_comp) {
-		ret = fusb302_i2c_write(chip, FUSB_REG_MEASURE, ra_mda);
-		if (ret < 0)
-			return ret;
-		usleep_range(50, 100);
-		ret = fusb302_i2c_read(chip, FUSB_REG_STATUS0, &status0);
-		if (ret < 0)
-			return ret;
-		ra_comp = !!(status0 & FUSB_REG_STATUS0_COMP);
+
+	/* determine polarity based on the status of both pins */
+	if (cc1 == TYPEC_CC_RD &&
+			(cc2 == TYPEC_CC_OPEN || cc2 == TYPEC_CC_RA)) {
+		cc_polarity = TYPEC_POLARITY_CC1;
+	} else if (cc2 == TYPEC_CC_RD &&
+		    (cc1 == TYPEC_CC_OPEN || cc1 == TYPEC_CC_RA)) {
+		cc_polarity = TYPEC_POLARITY_CC2;
+	} else {
+		fusb302_log(chip, "unexpected CC status cc1=%s, cc2=%s, restarting toggling",
+			    typec_cc_status_name[cc1],
+			    typec_cc_status_name[cc2]);
+		return fusb302_set_toggling(chip, toggling_mode);
 	}
-	if (rd_comp)
-		cc_status_active = TYPEC_CC_OPEN;
-	else if (ra_comp)
-		cc_status_active = TYPEC_CC_RD;
-	else
-		/* Ra is not supported, report as Open */
-		cc_status_active = TYPEC_CC_OPEN;
-	/* restart toggling if the cc status on the active line is OPEN */
-	if (cc_status_active == TYPEC_CC_OPEN) {
-		fusb302_log(chip, "restart toggling as CC_OPEN detected");
-		ret = fusb302_set_toggling(chip, chip->toggling_mode);
+	/* set polarity and pull_up, pull_down */
+	ret = fusb302_set_cc_polarity_and_pull(chip, cc_polarity, true, false);
+	if (ret < 0) {
+		fusb302_log(chip, "cannot set cc polarity %s, ret=%d",
+			    cc_polarity_name[cc_polarity], ret);
 		return ret;
 	}
 	/* update tcpm with the new cc value */
-	cc1 = (cc_polarity == TYPEC_POLARITY_CC1) ?
-	      cc_status_active : TYPEC_CC_OPEN;
-	cc2 = (cc_polarity == TYPEC_POLARITY_CC2) ?
-	      cc_status_active : TYPEC_CC_OPEN;
 	if ((chip->cc1 != cc1) || (chip->cc2 != cc2)) {
 		chip->cc1 = cc1;
 		chip->cc2 = cc2;
 		tcpm_cc_change(chip->tcpm_port);
 	}
-	/* turn off toggling */
-	ret = fusb302_set_toggling(chip, TOGGLING_MODE_OFF);
-	if (ret < 0) {
-		fusb302_log(chip,
-			    "cannot set toggling mode off, ret=%d", ret);
-		return ret;
-	}
 	/* set MDAC to Rd threshold, and unmask I_COMP for unplug detection */
 	ret = fusb302_i2c_write(chip, FUSB_REG_MEASURE, rd_mda);
 	if (ret < 0)
@@ -1427,7 +1382,7 @@ static int fusb302_handle_togdone_src(struct fusb302_chip *chip,
 				     FUSB_REG_MASK_COMP_CHNG);
 	if (ret < 0) {
 		fusb302_log(chip,
-			    "cannot unmask bc_lcl interrupt, ret=%d", ret);
+			    "cannot unmask comp_chng interrupt, ret=%d", ret);
 		return ret;
 	}
 	chip->intr_comp_chng = true;
@@ -1532,6 +1487,25 @@ static int fusb302_pd_read_message(struct fusb302_chip *chip,
 static irqreturn_t fusb302_irq_intn(int irq, void *dev_id)
 {
 	struct fusb302_chip *chip = dev_id;
+	unsigned long flags;
+
+	/* Disable our level triggered IRQ until our irq_work has cleared it */
+	disable_irq_nosync(chip->gpio_int_n_irq);
+
+	spin_lock_irqsave(&chip->irq_lock, flags);
+	if (chip->irq_suspended)
+		chip->irq_while_suspended = true;
+	else
+		schedule_work(&chip->irq_work);
+	spin_unlock_irqrestore(&chip->irq_lock, flags);
+
+	return IRQ_HANDLED;
+}
+
+static void fusb302_irq_work(struct work_struct *work)
+{
+	struct fusb302_chip *chip = container_of(work, struct fusb302_chip,
+						 irq_work);
 	int ret = 0;
 	u8 interrupt;
 	u8 interrupta;
@@ -1602,11 +1576,9 @@ static irqreturn_t fusb302_irq_intn(int irq, void *dev_id)
 		fusb302_log(chip, "IRQ: COMP_CHNG, comp=%s",
 			    comp_result ? "true" : "false");
 		if (comp_result) {
-			/* cc level > Rd_threashold, detach */
-			if (chip->cc_polarity == TYPEC_POLARITY_CC1)
-				chip->cc1 = TYPEC_CC_OPEN;
-			else
-				chip->cc2 = TYPEC_CC_OPEN;
+			/* cc level > Rd_threshold, detach */
+			chip->cc1 = TYPEC_CC_OPEN;
+			chip->cc2 = TYPEC_CC_OPEN;
 			tcpm_cc_change(chip->tcpm_port);
 		}
 	}
@@ -1662,8 +1634,7 @@ static irqreturn_t fusb302_irq_intn(int irq, void *dev_id)
 	}
 done:
 	mutex_unlock(&chip->lock);
-
-	return IRQ_HANDLED;
+	enable_irq(chip->gpio_int_n_irq);
 }
 
 static int init_gpio(struct fusb302_chip *chip)
@@ -1779,6 +1750,8 @@ static int fusb302_probe(struct i2c_client *client,
 	if (!chip->wq)
 		return -ENOMEM;
 
+	spin_lock_init(&chip->irq_lock);
+	INIT_WORK(&chip->irq_work, fusb302_irq_work);
 	INIT_DELAYED_WORK(&chip->bc_lvl_handler, fusb302_bc_lvl_handler_work);
 	init_tcpc_dev(&chip->tcpc_dev);
 
@@ -1798,10 +1771,9 @@ static int fusb302_probe(struct i2c_client *client,
 		goto destroy_workqueue;
 	}
 
-	ret = devm_request_threaded_irq(chip->dev, chip->gpio_int_n_irq,
-					NULL, fusb302_irq_intn,
-					IRQF_ONESHOT | IRQF_TRIGGER_LOW,
-					"fsc_interrupt_int_n", chip);
+	ret = request_irq(chip->gpio_int_n_irq, fusb302_irq_intn,
+			  IRQF_ONESHOT | IRQF_TRIGGER_LOW,
+			  "fsc_interrupt_int_n", chip);
 	if (ret < 0) {
 		dev_err(dev, "cannot request IRQ for GPIO Int_N, ret=%d", ret);
 		goto tcpm_unregister_port;
@@ -1824,6 +1796,10 @@ static int fusb302_remove(struct i2c_client *client)
 {
 	struct fusb302_chip *chip = i2c_get_clientdata(client);
 
+	disable_irq_wake(chip->gpio_int_n_irq);
+	free_irq(chip->gpio_int_n_irq, chip);
+	cancel_work_sync(&chip->irq_work);
+	cancel_delayed_work_sync(&chip->bc_lvl_handler);
 	tcpm_unregister_port(chip->tcpm_port);
 	destroy_workqueue(chip->wq);
 	fusb302_debugfs_exit(chip);
@@ -1834,19 +1810,29 @@ static int fusb302_remove(struct i2c_client *client)
 static int fusb302_pm_suspend(struct device *dev)
 {
 	struct fusb302_chip *chip = dev->driver_data;
+	unsigned long flags;
 
-	if (atomic_read(&chip->i2c_busy))
-		return -EBUSY;
-	atomic_set(&chip->pm_suspend, 1);
+	spin_lock_irqsave(&chip->irq_lock, flags);
+	chip->irq_suspended = true;
+	spin_unlock_irqrestore(&chip->irq_lock, flags);
 
+	/* Make sure any pending irq_work is finished before the bus suspends */
+	flush_work(&chip->irq_work);
 	return 0;
 }
 
 static int fusb302_pm_resume(struct device *dev)
 {
 	struct fusb302_chip *chip = dev->driver_data;
+	unsigned long flags;
 
-	atomic_set(&chip->pm_suspend, 0);
+	spin_lock_irqsave(&chip->irq_lock, flags);
+	if (chip->irq_while_suspended) {
+		schedule_work(&chip->irq_work);
+		chip->irq_while_suspended = false;
+	}
+	chip->irq_suspended = false;
+	spin_unlock_irqrestore(&chip->irq_lock, flags);
 
 	return 0;
 }
diff --git a/drivers/usb/typec/tcpm/tcpci.c b/drivers/usb/typec/tcpm/tcpci.c
index ac6b418b15f1..c1f7073a56de 100644
--- a/drivers/usb/typec/tcpm/tcpci.c
+++ b/drivers/usb/typec/tcpm/tcpci.c
@@ -100,13 +100,17 @@ static int tcpci_set_cc(struct tcpc_dev *tcpc, enum typec_cc_status cc)
 	return 0;
 }
 
-static int tcpci_start_drp_toggling(struct tcpc_dev *tcpc,
-				    enum typec_cc_status cc)
+static int tcpci_start_toggling(struct tcpc_dev *tcpc,
+				enum typec_port_type port_type,
+				enum typec_cc_status cc)
 {
 	int ret;
 	struct tcpci *tcpci = tcpc_to_tcpci(tcpc);
 	unsigned int reg = TCPC_ROLE_CTRL_DRP;
 
+	if (port_type != TYPEC_PORT_DRP)
+		return -EOPNOTSUPP;
+
 	/* Handle vendor drp toggling */
 	if (tcpci->data->start_drp_toggling) {
 		ret = tcpci->data->start_drp_toggling(tcpci, tcpci->data, cc);
@@ -511,7 +515,7 @@ struct tcpci *tcpci_register_port(struct device *dev, struct tcpci_data *data)
 	tcpci->tcpc.get_cc = tcpci_get_cc;
 	tcpci->tcpc.set_polarity = tcpci_set_polarity;
 	tcpci->tcpc.set_vconn = tcpci_set_vconn;
-	tcpci->tcpc.start_drp_toggling = tcpci_start_drp_toggling;
+	tcpci->tcpc.start_toggling = tcpci_start_toggling;
 
 	tcpci->tcpc.set_pd_rx = tcpci_set_pd_rx;
 	tcpci->tcpc.set_roles = tcpci_set_roles;
diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c
index a2233d72ae7c..fba32d84e578 100644
--- a/drivers/usb/typec/tcpm/tcpm.c
+++ b/drivers/usb/typec/tcpm/tcpm.c
@@ -31,7 +31,7 @@
 
 #define FOREACH_STATE(S)			\
 	S(INVALID_STATE),			\
-	S(DRP_TOGGLING),			\
+	S(TOGGLING),			\
 	S(SRC_UNATTACHED),			\
 	S(SRC_ATTACH_WAIT),			\
 	S(SRC_ATTACHED),			\
@@ -472,7 +472,7 @@ static void tcpm_log(struct tcpm_port *port, const char *fmt, ...)
 	/* Do not log while disconnected and unattached */
 	if (tcpm_port_is_disconnected(port) &&
 	    (port->state == SRC_UNATTACHED || port->state == SNK_UNATTACHED ||
-	     port->state == DRP_TOGGLING))
+	     port->state == TOGGLING))
 		return;
 
 	va_start(args, fmt);
@@ -2540,20 +2540,16 @@ static int tcpm_set_charge(struct tcpm_port *port, bool charge)
 	return 0;
 }
 
-static bool tcpm_start_drp_toggling(struct tcpm_port *port,
-				    enum typec_cc_status cc)
+static bool tcpm_start_toggling(struct tcpm_port *port, enum typec_cc_status cc)
 {
 	int ret;
 
-	if (port->tcpc->start_drp_toggling &&
-	    port->port_type == TYPEC_PORT_DRP) {
-		tcpm_log_force(port, "Start DRP toggling");
-		ret = port->tcpc->start_drp_toggling(port->tcpc, cc);
-		if (!ret)
-			return true;
-	}
+	if (!port->tcpc->start_toggling)
+		return false;
 
-	return false;
+	tcpm_log_force(port, "Start toggling");
+	ret = port->tcpc->start_toggling(port->tcpc, port->port_type, cc);
+	return ret == 0;
 }
 
 static void tcpm_set_cc(struct tcpm_port *port, enum typec_cc_status cc)
@@ -2847,15 +2843,15 @@ static void run_state_machine(struct tcpm_port *port)
 
 	port->enter_state = port->state;
 	switch (port->state) {
-	case DRP_TOGGLING:
+	case TOGGLING:
 		break;
 	/* SRC states */
 	case SRC_UNATTACHED:
 		if (!port->non_pd_role_swap)
 			tcpm_swap_complete(port, -ENOTCONN);
 		tcpm_src_detach(port);
-		if (tcpm_start_drp_toggling(port, tcpm_rp_cc(port))) {
-			tcpm_set_state(port, DRP_TOGGLING, 0);
+		if (tcpm_start_toggling(port, tcpm_rp_cc(port))) {
+			tcpm_set_state(port, TOGGLING, 0);
 			break;
 		}
 		tcpm_set_cc(port, tcpm_rp_cc(port));
@@ -3053,8 +3049,8 @@ static void run_state_machine(struct tcpm_port *port)
 			tcpm_swap_complete(port, -ENOTCONN);
 		tcpm_pps_complete(port, -ENOTCONN);
 		tcpm_snk_detach(port);
-		if (tcpm_start_drp_toggling(port, TYPEC_CC_RD)) {
-			tcpm_set_state(port, DRP_TOGGLING, 0);
+		if (tcpm_start_toggling(port, TYPEC_CC_RD)) {
+			tcpm_set_state(port, TOGGLING, 0);
 			break;
 		}
 		tcpm_set_cc(port, TYPEC_CC_RD);
@@ -3621,7 +3617,7 @@ static void _tcpm_cc_change(struct tcpm_port *port, enum typec_cc_status cc1,
 						       : "connected");
 
 	switch (port->state) {
-	case DRP_TOGGLING:
+	case TOGGLING:
 		if (tcpm_port_is_debug(port) || tcpm_port_is_audio(port) ||
 		    tcpm_port_is_source(port))
 			tcpm_set_state(port, SRC_ATTACH_WAIT, 0);
diff --git a/drivers/usb/typec/tcpm/wcove.c b/drivers/usb/typec/tcpm/wcove.c
index 6770afd40765..6b317c150bdd 100644
--- a/drivers/usb/typec/tcpm/wcove.c
+++ b/drivers/usb/typec/tcpm/wcove.c
@@ -416,12 +416,16 @@ static int wcove_pd_transmit(struct tcpc_dev *tcpc,
 	return regmap_write(wcove->regmap, USBC_TXCMD, cmd | USBC_TXCMD_START);
 }
 
-static int wcove_start_drp_toggling(struct tcpc_dev *tcpc,
-				    enum typec_cc_status cc)
+static int wcove_start_toggling(struct tcpc_dev *tcpc,
+				enum typec_port_type port_type,
+				enum typec_cc_status cc)
 {
 	struct wcove_typec *wcove = tcpc_to_wcove(tcpc);
 	unsigned int usbc_ctrl;
 
+	if (port_type != TYPEC_PORT_DRP)
+		return -EOPNOTSUPP;
+
 	usbc_ctrl = USBC_CONTROL1_MODE_DRP | USBC_CONTROL1_DRPTOGGLE_RANDOM;
 
 	switch (cc) {
@@ -587,17 +591,14 @@ static const u32 snk_pdo[] = {
 	PDO_VAR(5000, 12000, 3000),
 };
 
-static struct tcpc_config wcove_typec_config = {
-	.src_pdo = src_pdo,
-	.nr_src_pdo = ARRAY_SIZE(src_pdo),
-	.snk_pdo = snk_pdo,
-	.nr_snk_pdo = ARRAY_SIZE(snk_pdo),
-
-	.operating_snk_mw = 15000,
-
-	.type = TYPEC_PORT_DRP,
-	.data = TYPEC_PORT_DRD,
-	.default_role = TYPEC_SINK,
+static const struct property_entry wcove_props[] = {
+	PROPERTY_ENTRY_STRING("data-role", "dual"),
+	PROPERTY_ENTRY_STRING("power-role", "dual"),
+	PROPERTY_ENTRY_STRING("try-power-role", "sink"),
+	PROPERTY_ENTRY_U32_ARRAY("source-pdos", src_pdo),
+	PROPERTY_ENTRY_U32_ARRAY("sink-pdos", snk_pdo),
+	PROPERTY_ENTRY_U32("op-sink-microwatt", 15000),
+	{ }
 };
 
 static int wcove_typec_probe(struct platform_device *pdev)
@@ -642,23 +643,28 @@ static int wcove_typec_probe(struct platform_device *pdev)
 	wcove->tcpc.set_polarity = wcove_set_polarity;
 	wcove->tcpc.set_vconn = wcove_set_vconn;
 	wcove->tcpc.set_current_limit = wcove_set_current_limit;
-	wcove->tcpc.start_drp_toggling = wcove_start_drp_toggling;
+	wcove->tcpc.start_toggling = wcove_start_toggling;
 
 	wcove->tcpc.set_pd_rx = wcove_set_pd_rx;
 	wcove->tcpc.set_roles = wcove_set_roles;
 	wcove->tcpc.pd_transmit = wcove_pd_transmit;
 
-	wcove->tcpc.config = &wcove_typec_config;
+	wcove->tcpc.fwnode = fwnode_create_software_node(wcove_props, NULL);
+	if (IS_ERR(wcove->tcpc.fwnode))
+		return PTR_ERR(wcove->tcpc.fwnode);
 
 	wcove->tcpm = tcpm_register_port(wcove->dev, &wcove->tcpc);
-	if (IS_ERR(wcove->tcpm))
+	if (IS_ERR(wcove->tcpm)) {
+		fwnode_remove_software_node(wcove->tcpc.fwnode);
 		return PTR_ERR(wcove->tcpm);
+	}
 
 	ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
 					wcove_typec_irq, IRQF_ONESHOT,
 					"wcove_typec", wcove);
 	if (ret) {
 		tcpm_unregister_port(wcove->tcpm);
+		fwnode_remove_software_node(wcove->tcpc.fwnode);
 		return ret;
 	}
 
@@ -678,6 +684,7 @@ static int wcove_typec_remove(struct platform_device *pdev)
 	regmap_write(wcove->regmap, USBC_IRQMASK2, val | USBC_IRQMASK2_ALL);
 
 	tcpm_unregister_port(wcove->tcpm);
+	fwnode_remove_software_node(wcove->tcpc.fwnode);
 
 	return 0;
 }
diff --git a/drivers/usb/typec/ucsi/Makefile b/drivers/usb/typec/ucsi/Makefile
index 2f4900b26210..b35e15a1f02c 100644
--- a/drivers/usb/typec/ucsi/Makefile
+++ b/drivers/usb/typec/ucsi/Makefile
@@ -1,12 +1,15 @@
 # SPDX-License-Identifier: GPL-2.0
-CFLAGS_trace.o			:= -I$(src)
+CFLAGS_trace.o				:= -I$(src)
 
-obj-$(CONFIG_TYPEC_UCSI)	+= typec_ucsi.o
+obj-$(CONFIG_TYPEC_UCSI)		+= typec_ucsi.o
 
-typec_ucsi-y			:= ucsi.o
+typec_ucsi-y				:= ucsi.o
 
-typec_ucsi-$(CONFIG_TRACING)	+= trace.o
+typec_ucsi-$(CONFIG_TRACING)		+= trace.o
 
-obj-$(CONFIG_UCSI_ACPI)		+= ucsi_acpi.o
+ifneq ($(CONFIG_TYPEC_DP_ALTMODE),)
+	typec_ucsi-y			+= displayport.o
+endif
 
-obj-$(CONFIG_UCSI_CCG)		+= ucsi_ccg.o
+obj-$(CONFIG_UCSI_ACPI)			+= ucsi_acpi.o
+obj-$(CONFIG_UCSI_CCG)			+= ucsi_ccg.o
diff --git a/drivers/usb/typec/ucsi/displayport.c b/drivers/usb/typec/ucsi/displayport.c
new file mode 100644
index 000000000000..6c103697c582
--- /dev/null
+++ b/drivers/usb/typec/ucsi/displayport.c
@@ -0,0 +1,315 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * UCSI DisplayPort Alternate Mode Support
+ *
+ * Copyright (C) 2018, Intel Corporation
+ * Author: Heikki Krogerus <heikki.krogerus@linux.intel.com>
+ */
+
+#include <linux/usb/typec_dp.h>
+#include <linux/usb/pd_vdo.h>
+
+#include "ucsi.h"
+
+#define UCSI_CMD_SET_NEW_CAM(_con_num_, _enter_, _cam_, _am_)		\
+	 (UCSI_SET_NEW_CAM | ((_con_num_) << 16) | ((_enter_) << 23) |	\
+	  ((_cam_) << 24) | ((u64)(_am_) << 32))
+
+struct ucsi_dp {
+	struct typec_displayport_data data;
+	struct ucsi_connector *con;
+	struct typec_altmode *alt;
+	struct work_struct work;
+	int offset;
+
+	bool override;
+	bool initialized;
+
+	u32 header;
+	u32 *vdo_data;
+	u8 vdo_size;
+};
+
+/*
+ * Note. Alternate mode control is optional feature in UCSI. It means that even
+ * if the system supports alternate modes, the OS may not be aware of them.
+ *
+ * In most cases however, the OS will be able to see the supported alternate
+ * modes, but it may still not be able to configure them, not even enter or exit
+ * them. That is because UCSI defines alt mode details and alt mode "overriding"
+ * as separate options.
+ *
+ * In case alt mode details are supported, but overriding is not, the driver
+ * will still display the supported pin assignments and configuration, but any
+ * changes the user attempts to do will lead into failure with return value of
+ * -EOPNOTSUPP.
+ */
+
+static int ucsi_displayport_enter(struct typec_altmode *alt)
+{
+	struct ucsi_dp *dp = typec_altmode_get_drvdata(alt);
+	struct ucsi_control ctrl;
+	u8 cur = 0;
+	int ret;
+
+	mutex_lock(&dp->con->lock);
+
+	if (!dp->override && dp->initialized) {
+		const struct typec_altmode *p = typec_altmode_get_partner(alt);
+
+		dev_warn(&p->dev,
+			 "firmware doesn't support alternate mode overriding\n");
+		mutex_unlock(&dp->con->lock);
+		return -EOPNOTSUPP;
+	}
+
+	UCSI_CMD_GET_CURRENT_CAM(ctrl, dp->con->num);
+	ret = ucsi_send_command(dp->con->ucsi, &ctrl, &cur, sizeof(cur));
+	if (ret < 0) {
+		if (dp->con->ucsi->ppm->data->version > 0x0100) {
+			mutex_unlock(&dp->con->lock);
+			return ret;
+		}
+		cur = 0xff;
+	}
+
+	if (cur != 0xff) {
+		mutex_unlock(&dp->con->lock);
+		return -EBUSY;
+	}
+
+	/*
+	 * We can't send the New CAM command yet to the PPM as it needs the
+	 * configuration value as well. Pretending that we have now entered the
+	 * mode, and letting the alt mode driver continue.
+	 */
+
+	dp->header = VDO(USB_TYPEC_DP_SID, 1, CMD_ENTER_MODE);
+	dp->header |= VDO_OPOS(USB_TYPEC_DP_MODE);
+	dp->header |= VDO_CMDT(CMDT_RSP_ACK);
+
+	dp->vdo_data = NULL;
+	dp->vdo_size = 1;
+
+	schedule_work(&dp->work);
+
+	mutex_unlock(&dp->con->lock);
+
+	return 0;
+}
+
+static int ucsi_displayport_exit(struct typec_altmode *alt)
+{
+	struct ucsi_dp *dp = typec_altmode_get_drvdata(alt);
+	struct ucsi_control ctrl;
+	int ret = 0;
+
+	mutex_lock(&dp->con->lock);
+
+	if (!dp->override) {
+		const struct typec_altmode *p = typec_altmode_get_partner(alt);
+
+		dev_warn(&p->dev,
+			 "firmware doesn't support alternate mode overriding\n");
+		ret = -EOPNOTSUPP;
+		goto out_unlock;
+	}
+
+	ctrl.raw_cmd = UCSI_CMD_SET_NEW_CAM(dp->con->num, 0, dp->offset, 0);
+	ret = ucsi_send_command(dp->con->ucsi, &ctrl, NULL, 0);
+	if (ret < 0)
+		goto out_unlock;
+
+	dp->header = VDO(USB_TYPEC_DP_SID, 1, CMD_EXIT_MODE);
+	dp->header |= VDO_OPOS(USB_TYPEC_DP_MODE);
+	dp->header |= VDO_CMDT(CMDT_RSP_ACK);
+
+	dp->vdo_data = NULL;
+	dp->vdo_size = 1;
+
+	schedule_work(&dp->work);
+
+out_unlock:
+	mutex_unlock(&dp->con->lock);
+
+	return ret;
+}
+
+/*
+ * We do not actually have access to the Status Update VDO, so we have to guess
+ * things.
+ */
+static int ucsi_displayport_status_update(struct ucsi_dp *dp)
+{
+	u32 cap = dp->alt->vdo;
+
+	dp->data.status = DP_STATUS_ENABLED;
+
+	/*
+	 * If pin assignement D is supported, claiming always
+	 * that Multi-function is preferred.
+	 */
+	if (DP_CAP_CAPABILITY(cap) & DP_CAP_UFP_D) {
+		dp->data.status |= DP_STATUS_CON_UFP_D;
+
+		if (DP_CAP_UFP_D_PIN_ASSIGN(cap) & BIT(DP_PIN_ASSIGN_D))
+			dp->data.status |= DP_STATUS_PREFER_MULTI_FUNC;
+	} else {
+		dp->data.status |= DP_STATUS_CON_DFP_D;
+
+		if (DP_CAP_DFP_D_PIN_ASSIGN(cap) & BIT(DP_PIN_ASSIGN_D))
+			dp->data.status |= DP_STATUS_PREFER_MULTI_FUNC;
+	}
+
+	dp->vdo_data = &dp->data.status;
+	dp->vdo_size = 2;
+
+	return 0;
+}
+
+static int ucsi_displayport_configure(struct ucsi_dp *dp)
+{
+	u32 pins = DP_CONF_GET_PIN_ASSIGN(dp->data.conf);
+	struct ucsi_control ctrl;
+
+	if (!dp->override)
+		return 0;
+
+	ctrl.raw_cmd = UCSI_CMD_SET_NEW_CAM(dp->con->num, 1, dp->offset, pins);
+
+	return ucsi_send_command(dp->con->ucsi, &ctrl, NULL, 0);
+}
+
+static int ucsi_displayport_vdm(struct typec_altmode *alt,
+				u32 header, const u32 *data, int count)
+{
+	struct ucsi_dp *dp = typec_altmode_get_drvdata(alt);
+	int cmd_type = PD_VDO_CMDT(header);
+	int cmd = PD_VDO_CMD(header);
+
+	mutex_lock(&dp->con->lock);
+
+	if (!dp->override && dp->initialized) {
+		const struct typec_altmode *p = typec_altmode_get_partner(alt);
+
+		dev_warn(&p->dev,
+			 "firmware doesn't support alternate mode overriding\n");
+		mutex_unlock(&dp->con->lock);
+		return -EOPNOTSUPP;
+	}
+
+	switch (cmd_type) {
+	case CMDT_INIT:
+		dp->header = VDO(USB_TYPEC_DP_SID, 1, cmd);
+		dp->header |= VDO_OPOS(USB_TYPEC_DP_MODE);
+
+		switch (cmd) {
+		case DP_CMD_STATUS_UPDATE:
+			if (ucsi_displayport_status_update(dp))
+				dp->header |= VDO_CMDT(CMDT_RSP_NAK);
+			else
+				dp->header |= VDO_CMDT(CMDT_RSP_ACK);
+			break;
+		case DP_CMD_CONFIGURE:
+			dp->data.conf = *data;
+			if (ucsi_displayport_configure(dp)) {
+				dp->header |= VDO_CMDT(CMDT_RSP_NAK);
+			} else {
+				dp->header |= VDO_CMDT(CMDT_RSP_ACK);
+				if (dp->initialized)
+					ucsi_altmode_update_active(dp->con);
+				else
+					dp->initialized = true;
+			}
+			break;
+		default:
+			dp->header |= VDO_CMDT(CMDT_RSP_ACK);
+			break;
+		}
+
+		schedule_work(&dp->work);
+		break;
+	default:
+		break;
+	}
+
+	mutex_unlock(&dp->con->lock);
+
+	return 0;
+}
+
+static const struct typec_altmode_ops ucsi_displayport_ops = {
+	.enter = ucsi_displayport_enter,
+	.exit = ucsi_displayport_exit,
+	.vdm = ucsi_displayport_vdm,
+};
+
+static void ucsi_displayport_work(struct work_struct *work)
+{
+	struct ucsi_dp *dp = container_of(work, struct ucsi_dp, work);
+	int ret;
+
+	mutex_lock(&dp->con->lock);
+
+	ret = typec_altmode_vdm(dp->alt, dp->header,
+				dp->vdo_data, dp->vdo_size);
+	if (ret)
+		dev_err(&dp->alt->dev, "VDM 0x%x failed\n", dp->header);
+
+	dp->vdo_data = NULL;
+	dp->vdo_size = 0;
+	dp->header = 0;
+
+	mutex_unlock(&dp->con->lock);
+}
+
+void ucsi_displayport_remove_partner(struct typec_altmode *alt)
+{
+	struct ucsi_dp *dp;
+
+	if (!alt)
+		return;
+
+	dp = typec_altmode_get_drvdata(alt);
+	dp->data.conf = 0;
+	dp->data.status = 0;
+	dp->initialized = false;
+}
+
+struct typec_altmode *ucsi_register_displayport(struct ucsi_connector *con,
+						bool override, int offset,
+						struct typec_altmode_desc *desc)
+{
+	u8 all_assignments = BIT(DP_PIN_ASSIGN_C) | BIT(DP_PIN_ASSIGN_D) |
+			     BIT(DP_PIN_ASSIGN_E);
+	struct typec_altmode *alt;
+	struct ucsi_dp *dp;
+
+	/* We can't rely on the firmware with the capabilities. */
+	desc->vdo |= DP_CAP_DP_SIGNALING | DP_CAP_RECEPTACLE;
+
+	/* Claiming that we support all pin assignments */
+	desc->vdo |= all_assignments << 8;
+	desc->vdo |= all_assignments << 16;
+
+	alt = typec_port_register_altmode(con->port, desc);
+	if (IS_ERR(alt))
+		return alt;
+
+	dp = devm_kzalloc(&alt->dev, sizeof(*dp), GFP_KERNEL);
+	if (!dp) {
+		typec_unregister_altmode(alt);
+		return ERR_PTR(-ENOMEM);
+	}
+
+	INIT_WORK(&dp->work, ucsi_displayport_work);
+	dp->override = override;
+	dp->offset = offset;
+	dp->con = con;
+	dp->alt = alt;
+
+	alt->ops = &ucsi_displayport_ops;
+	typec_altmode_set_drvdata(alt, dp);
+
+	return alt;
+}
diff --git a/drivers/usb/typec/ucsi/trace.c b/drivers/usb/typec/ucsi/trace.c
index ffa3b4c3f338..1dabafb74320 100644
--- a/drivers/usb/typec/ucsi/trace.c
+++ b/drivers/usb/typec/ucsi/trace.c
@@ -60,3 +60,15 @@ const char *ucsi_cci_str(u32 cci)
 
 	return "";
 }
+
+static const char * const ucsi_recipient_strs[] = {
+	[UCSI_RECIPIENT_CON]		= "port",
+	[UCSI_RECIPIENT_SOP]		= "partner",
+	[UCSI_RECIPIENT_SOP_P]		= "plug (prime)",
+	[UCSI_RECIPIENT_SOP_PP]		= "plug (double prime)",
+};
+
+const char *ucsi_recipient_str(u8 recipient)
+{
+	return ucsi_recipient_strs[recipient];
+}
diff --git a/drivers/usb/typec/ucsi/trace.h b/drivers/usb/typec/ucsi/trace.h
index 5e2906df2db7..783ec9c72055 100644
--- a/drivers/usb/typec/ucsi/trace.h
+++ b/drivers/usb/typec/ucsi/trace.h
@@ -7,6 +7,7 @@
 #define __UCSI_TRACE_H
 
 #include <linux/tracepoint.h>
+#include <linux/usb/typec_altmode.h>
 
 const char *ucsi_cmd_str(u64 raw_cmd);
 const char *ucsi_ack_str(u8 ack);
@@ -134,6 +135,31 @@ DEFINE_EVENT(ucsi_log_connector_status, ucsi_register_port,
 	TP_ARGS(port, status)
 );
 
+DECLARE_EVENT_CLASS(ucsi_log_register_altmode,
+	TP_PROTO(u8 recipient, struct typec_altmode *alt),
+	TP_ARGS(recipient, alt),
+	TP_STRUCT__entry(
+		__field(u8, recipient)
+		__field(u16, svid)
+		__field(u8, mode)
+		__field(u32, vdo)
+	),
+	TP_fast_assign(
+		__entry->recipient = recipient;
+		__entry->svid = alt->svid;
+		__entry->mode = alt->mode;
+		__entry->vdo = alt->vdo;
+	),
+	TP_printk("%s alt mode: svid %04x, mode %d vdo %x",
+		  ucsi_recipient_str(__entry->recipient), __entry->svid,
+		  __entry->mode, __entry->vdo)
+);
+
+DEFINE_EVENT(ucsi_log_register_altmode, ucsi_register_altmode,
+	TP_PROTO(u8 recipient, struct typec_altmode *alt),
+	TP_ARGS(recipient, alt)
+);
+
 #endif /* __UCSI_TRACE_H */
 
 /* This part must be outside protection */
diff --git a/drivers/usb/typec/ucsi/ucsi.c b/drivers/usb/typec/ucsi/ucsi.c
index 8d0a6fe748bd..7850b851cecd 100644
--- a/drivers/usb/typec/ucsi/ucsi.c
+++ b/drivers/usb/typec/ucsi/ucsi.c
@@ -12,7 +12,7 @@
 #include <linux/module.h>
 #include <linux/delay.h>
 #include <linux/slab.h>
-#include <linux/usb/typec.h>
+#include <linux/usb/typec_dp.h>
 
 #include "ucsi.h"
 #include "trace.h"
@@ -39,49 +39,6 @@
  */
 #define UCSI_SWAP_TIMEOUT_MS	5000
 
-enum ucsi_status {
-	UCSI_IDLE = 0,
-	UCSI_BUSY,
-	UCSI_ERROR,
-};
-
-struct ucsi_connector {
-	int num;
-
-	struct ucsi *ucsi;
-	struct work_struct work;
-	struct completion complete;
-
-	struct typec_port *port;
-	struct typec_partner *partner;
-
-	struct typec_capability typec_cap;
-
-	struct ucsi_connector_status status;
-	struct ucsi_connector_capability cap;
-};
-
-struct ucsi {
-	struct device *dev;
-	struct ucsi_ppm *ppm;
-
-	enum ucsi_status status;
-	struct completion complete;
-	struct ucsi_capability cap;
-	struct ucsi_connector *connector;
-
-	struct work_struct work;
-
-	/* PPM Communication lock */
-	struct mutex ppm_lock;
-
-	/* PPM communication flags */
-	unsigned long flags;
-#define EVENT_PENDING	0
-#define COMMAND_PENDING	1
-#define ACK_PENDING	2
-};
-
 static inline int ucsi_sync(struct ucsi *ucsi)
 {
 	if (ucsi->ppm && ucsi->ppm->sync)
@@ -238,8 +195,226 @@ err:
 	return ret;
 }
 
+int ucsi_send_command(struct ucsi *ucsi, struct ucsi_control *ctrl,
+		      void *retval, size_t size)
+{
+	int ret;
+
+	mutex_lock(&ucsi->ppm_lock);
+	ret = ucsi_run_command(ucsi, ctrl, retval, size);
+	mutex_unlock(&ucsi->ppm_lock);
+
+	return ret;
+}
+
 /* -------------------------------------------------------------------------- */
 
+void ucsi_altmode_update_active(struct ucsi_connector *con)
+{
+	const struct typec_altmode *altmode = NULL;
+	struct ucsi_control ctrl;
+	int ret;
+	u8 cur;
+	int i;
+
+	UCSI_CMD_GET_CURRENT_CAM(ctrl, con->num);
+	ret = ucsi_run_command(con->ucsi, &ctrl, &cur, sizeof(cur));
+	if (ret < 0) {
+		if (con->ucsi->ppm->data->version > 0x0100) {
+			dev_err(con->ucsi->dev,
+				"GET_CURRENT_CAM command failed\n");
+			return;
+		}
+		cur = 0xff;
+	}
+
+	if (cur < UCSI_MAX_ALTMODES)
+		altmode = typec_altmode_get_partner(con->port_altmode[cur]);
+
+	for (i = 0; con->partner_altmode[i]; i++)
+		typec_altmode_update_active(con->partner_altmode[i],
+					    con->partner_altmode[i] == altmode);
+}
+
+static u8 ucsi_altmode_next_mode(struct typec_altmode **alt, u16 svid)
+{
+	u8 mode = 1;
+	int i;
+
+	for (i = 0; alt[i]; i++)
+		if (alt[i]->svid == svid)
+			mode++;
+
+	return mode;
+}
+
+static int ucsi_next_altmode(struct typec_altmode **alt)
+{
+	int i = 0;
+
+	for (i = 0; i < UCSI_MAX_ALTMODES; i++)
+		if (!alt[i])
+			return i;
+
+	return -ENOENT;
+}
+
+static int ucsi_register_altmode(struct ucsi_connector *con,
+				 struct typec_altmode_desc *desc,
+				 u8 recipient)
+{
+	struct typec_altmode *alt;
+	bool override;
+	int ret;
+	int i;
+
+	override = !!(con->ucsi->cap.features & UCSI_CAP_ALT_MODE_OVERRIDE);
+
+	switch (recipient) {
+	case UCSI_RECIPIENT_CON:
+		i = ucsi_next_altmode(con->port_altmode);
+		if (i < 0) {
+			ret = i;
+			goto err;
+		}
+
+		desc->mode = ucsi_altmode_next_mode(con->port_altmode,
+						    desc->svid);
+
+		switch (desc->svid) {
+		case USB_TYPEC_DP_SID:
+		case USB_TYPEC_NVIDIA_VLINK_SID:
+			alt = ucsi_register_displayport(con, override, i, desc);
+			break;
+		default:
+			alt = typec_port_register_altmode(con->port, desc);
+			break;
+		}
+
+		if (IS_ERR(alt)) {
+			ret = PTR_ERR(alt);
+			goto err;
+		}
+
+		con->port_altmode[i] = alt;
+		break;
+	case UCSI_RECIPIENT_SOP:
+		i = ucsi_next_altmode(con->partner_altmode);
+		if (i < 0) {
+			ret = i;
+			goto err;
+		}
+
+		desc->mode = ucsi_altmode_next_mode(con->partner_altmode,
+						    desc->svid);
+
+		alt = typec_partner_register_altmode(con->partner, desc);
+		if (IS_ERR(alt)) {
+			ret = PTR_ERR(alt);
+			goto err;
+		}
+
+		con->partner_altmode[i] = alt;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	trace_ucsi_register_altmode(recipient, alt);
+
+	return 0;
+
+err:
+	dev_err(con->ucsi->dev, "failed to registers svid 0x%04x mode %d\n",
+		desc->svid, desc->mode);
+
+	return ret;
+}
+
+static int ucsi_register_altmodes(struct ucsi_connector *con, u8 recipient)
+{
+	int max_altmodes = UCSI_MAX_ALTMODES;
+	struct typec_altmode_desc desc;
+	struct ucsi_altmode alt[2];
+	struct ucsi_control ctrl;
+	int num = 1;
+	int ret;
+	int len;
+	int j;
+	int i;
+
+	if (!(con->ucsi->cap.features & UCSI_CAP_ALT_MODE_DETAILS))
+		return 0;
+
+	if (recipient == UCSI_RECIPIENT_SOP && con->partner_altmode[0])
+		return 0;
+
+	if (recipient == UCSI_RECIPIENT_CON)
+		max_altmodes = con->ucsi->cap.num_alt_modes;
+
+	for (i = 0; i < max_altmodes;) {
+		memset(alt, 0, sizeof(alt));
+		UCSI_CMD_GET_ALTERNATE_MODES(ctrl, recipient, con->num, i, 1);
+		len = ucsi_run_command(con->ucsi, &ctrl, alt, sizeof(alt));
+		if (len <= 0)
+			return len;
+
+		/*
+		 * This code is requesting one alt mode at a time, but some PPMs
+		 * may still return two. If that happens both alt modes need be
+		 * registered and the offset for the next alt mode has to be
+		 * incremented.
+		 */
+		num = len / sizeof(alt[0]);
+		i += num;
+
+		for (j = 0; j < num; j++) {
+			if (!alt[j].svid)
+				return 0;
+
+			memset(&desc, 0, sizeof(desc));
+			desc.vdo = alt[j].mid;
+			desc.svid = alt[j].svid;
+			desc.roles = TYPEC_PORT_DRD;
+
+			ret = ucsi_register_altmode(con, &desc, recipient);
+			if (ret)
+				return ret;
+		}
+	}
+
+	return 0;
+}
+
+static void ucsi_unregister_altmodes(struct ucsi_connector *con, u8 recipient)
+{
+	const struct typec_altmode *pdev;
+	struct typec_altmode **adev;
+	int i = 0;
+
+	switch (recipient) {
+	case UCSI_RECIPIENT_CON:
+		adev = con->port_altmode;
+		break;
+	case UCSI_RECIPIENT_SOP:
+		adev = con->partner_altmode;
+		break;
+	default:
+		return;
+	}
+
+	while (adev[i]) {
+		if (recipient == UCSI_RECIPIENT_SOP &&
+		    (adev[i]->svid == USB_TYPEC_DP_SID ||
+			adev[i]->svid == USB_TYPEC_NVIDIA_VLINK_SID)) {
+			pdev = typec_altmode_get_partner(adev[i]);
+			ucsi_displayport_remove_partner((void *)pdev);
+		}
+		typec_unregister_altmode(adev[i]);
+		adev[i++] = NULL;
+	}
+}
+
 static void ucsi_pwr_opmode_change(struct ucsi_connector *con)
 {
 	switch (con->status.pwr_op_mode) {
@@ -299,10 +474,43 @@ static void ucsi_unregister_partner(struct ucsi_connector *con)
 	if (!con->partner)
 		return;
 
+	ucsi_unregister_altmodes(con, UCSI_RECIPIENT_SOP);
 	typec_unregister_partner(con->partner);
 	con->partner = NULL;
 }
 
+static void ucsi_partner_change(struct ucsi_connector *con)
+{
+	int ret;
+
+	if (!con->partner)
+		return;
+
+	switch (con->status.partner_type) {
+	case UCSI_CONSTAT_PARTNER_TYPE_UFP:
+		typec_set_data_role(con->port, TYPEC_HOST);
+		break;
+	case UCSI_CONSTAT_PARTNER_TYPE_DFP:
+		typec_set_data_role(con->port, TYPEC_DEVICE);
+		break;
+	default:
+		break;
+	}
+
+	/* Complete pending data role swap */
+	if (!completion_done(&con->complete))
+		complete(&con->complete);
+
+	/* Can't rely on Partner Flags field. Always checking the alt modes. */
+	ret = ucsi_register_altmodes(con, UCSI_RECIPIENT_SOP);
+	if (ret)
+		dev_err(con->ucsi->dev,
+			"con%d: failed to register partner alternate modes\n",
+			con->num);
+	else
+		ucsi_altmode_update_active(con);
+}
+
 static void ucsi_connector_change(struct work_struct *work)
 {
 	struct ucsi_connector *con = container_of(work, struct ucsi_connector,
@@ -311,10 +519,10 @@ static void ucsi_connector_change(struct work_struct *work)
 	struct ucsi_control ctrl;
 	int ret;
 
-	mutex_lock(&ucsi->ppm_lock);
+	mutex_lock(&con->lock);
 
 	UCSI_CMD_GET_CONNECTOR_STATUS(ctrl, con->num);
-	ret = ucsi_run_command(ucsi, &ctrl, &con->status, sizeof(con->status));
+	ret = ucsi_send_command(ucsi, &ctrl, &con->status, sizeof(con->status));
 	if (ret < 0) {
 		dev_err(ucsi->dev, "%s: GET_CONNECTOR_STATUS failed (%d)\n",
 			__func__, ret);
@@ -332,23 +540,6 @@ static void ucsi_connector_change(struct work_struct *work)
 			complete(&con->complete);
 	}
 
-	if (con->status.change & UCSI_CONSTAT_PARTNER_CHANGE) {
-		switch (con->status.partner_type) {
-		case UCSI_CONSTAT_PARTNER_TYPE_UFP:
-			typec_set_data_role(con->port, TYPEC_HOST);
-			break;
-		case UCSI_CONSTAT_PARTNER_TYPE_DFP:
-			typec_set_data_role(con->port, TYPEC_DEVICE);
-			break;
-		default:
-			break;
-		}
-
-		/* Complete pending data role swap */
-		if (!completion_done(&con->complete))
-			complete(&con->complete);
-	}
-
 	if (con->status.change & UCSI_CONSTAT_CONNECT_CHANGE) {
 		typec_set_pwr_role(con->port, con->status.pwr_dir);
 
@@ -369,6 +560,19 @@ static void ucsi_connector_change(struct work_struct *work)
 			ucsi_unregister_partner(con);
 	}
 
+	if (con->status.change & UCSI_CONSTAT_CAM_CHANGE) {
+		/*
+		 * We don't need to know the currently supported alt modes here.
+		 * Running GET_CAM_SUPPORTED command just to make sure the PPM
+		 * does not get stuck in case it assumes we do so.
+		 */
+		UCSI_CMD_GET_CAM_SUPPORTED(ctrl, con->num);
+		ucsi_run_command(con->ucsi, &ctrl, NULL, 0);
+	}
+
+	if (con->status.change & UCSI_CONSTAT_PARTNER_CHANGE)
+		ucsi_partner_change(con);
+
 	ret = ucsi_ack(ucsi, UCSI_ACK_EVENT);
 	if (ret)
 		dev_err(ucsi->dev, "%s: ACK failed (%d)", __func__, ret);
@@ -377,7 +581,7 @@ static void ucsi_connector_change(struct work_struct *work)
 
 out_unlock:
 	clear_bit(EVENT_PENDING, &ucsi->flags);
-	mutex_unlock(&ucsi->ppm_lock);
+	mutex_unlock(&con->lock);
 }
 
 /**
@@ -427,7 +631,7 @@ static int ucsi_reset_connector(struct ucsi_connector *con, bool hard)
 
 	UCSI_CMD_CONNECTOR_RESET(ctrl, con, hard);
 
-	return ucsi_run_command(con->ucsi, &ctrl, NULL, 0);
+	return ucsi_send_command(con->ucsi, &ctrl, NULL, 0);
 }
 
 static int ucsi_reset_ppm(struct ucsi *ucsi)
@@ -481,15 +685,17 @@ static int ucsi_role_cmd(struct ucsi_connector *con, struct ucsi_control *ctrl)
 {
 	int ret;
 
-	ret = ucsi_run_command(con->ucsi, ctrl, NULL, 0);
+	ret = ucsi_send_command(con->ucsi, ctrl, NULL, 0);
 	if (ret == -ETIMEDOUT) {
 		struct ucsi_control c;
 
 		/* PPM most likely stopped responding. Resetting everything. */
+		mutex_lock(&con->ucsi->ppm_lock);
 		ucsi_reset_ppm(con->ucsi);
+		mutex_unlock(&con->ucsi->ppm_lock);
 
 		UCSI_CMD_SET_NTFY_ENABLE(c, UCSI_ENABLE_NTFY_ALL);
-		ucsi_run_command(con->ucsi, &c, NULL, 0);
+		ucsi_send_command(con->ucsi, &c, NULL, 0);
 
 		ucsi_reset_connector(con, true);
 	}
@@ -504,10 +710,12 @@ ucsi_dr_swap(const struct typec_capability *cap, enum typec_data_role role)
 	struct ucsi_control ctrl;
 	int ret = 0;
 
-	if (!con->partner)
-		return -ENOTCONN;
+	mutex_lock(&con->lock);
 
-	mutex_lock(&con->ucsi->ppm_lock);
+	if (!con->partner) {
+		ret = -ENOTCONN;
+		goto out_unlock;
+	}
 
 	if ((con->status.partner_type == UCSI_CONSTAT_PARTNER_TYPE_DFP &&
 	     role == TYPEC_DEVICE) ||
@@ -520,18 +728,14 @@ ucsi_dr_swap(const struct typec_capability *cap, enum typec_data_role role)
 	if (ret < 0)
 		goto out_unlock;
 
-	mutex_unlock(&con->ucsi->ppm_lock);
-
 	if (!wait_for_completion_timeout(&con->complete,
 					msecs_to_jiffies(UCSI_SWAP_TIMEOUT_MS)))
-		return -ETIMEDOUT;
-
-	return 0;
+		ret = -ETIMEDOUT;
 
 out_unlock:
-	mutex_unlock(&con->ucsi->ppm_lock);
+	mutex_unlock(&con->lock);
 
-	return ret;
+	return ret < 0 ? ret : 0;
 }
 
 static int
@@ -541,10 +745,12 @@ ucsi_pr_swap(const struct typec_capability *cap, enum typec_role role)
 	struct ucsi_control ctrl;
 	int ret = 0;
 
-	if (!con->partner)
-		return -ENOTCONN;
+	mutex_lock(&con->lock);
 
-	mutex_lock(&con->ucsi->ppm_lock);
+	if (!con->partner) {
+		ret = -ENOTCONN;
+		goto out_unlock;
+	}
 
 	if (con->status.pwr_dir == role)
 		goto out_unlock;
@@ -554,13 +760,11 @@ ucsi_pr_swap(const struct typec_capability *cap, enum typec_role role)
 	if (ret < 0)
 		goto out_unlock;
 
-	mutex_unlock(&con->ucsi->ppm_lock);
-
 	if (!wait_for_completion_timeout(&con->complete,
-					msecs_to_jiffies(UCSI_SWAP_TIMEOUT_MS)))
-		return -ETIMEDOUT;
-
-	mutex_lock(&con->ucsi->ppm_lock);
+				msecs_to_jiffies(UCSI_SWAP_TIMEOUT_MS))) {
+		ret = -ETIMEDOUT;
+		goto out_unlock;
+	}
 
 	/* Something has gone wrong while swapping the role */
 	if (con->status.pwr_op_mode != UCSI_CONSTAT_PWR_OPMODE_PD) {
@@ -569,7 +773,7 @@ ucsi_pr_swap(const struct typec_capability *cap, enum typec_role role)
 	}
 
 out_unlock:
-	mutex_unlock(&con->ucsi->ppm_lock);
+	mutex_unlock(&con->lock);
 
 	return ret;
 }
@@ -595,6 +799,7 @@ static int ucsi_register_port(struct ucsi *ucsi, int index)
 
 	INIT_WORK(&con->work, ucsi_connector_change);
 	init_completion(&con->complete);
+	mutex_init(&con->lock);
 	con->num = index + 1;
 	con->ucsi = ucsi;
 
@@ -636,6 +841,12 @@ static int ucsi_register_port(struct ucsi *ucsi, int index)
 	if (IS_ERR(con->port))
 		return PTR_ERR(con->port);
 
+	/* Alternate modes */
+	ret = ucsi_register_altmodes(con, UCSI_RECIPIENT_CON);
+	if (ret)
+		dev_err(ucsi->dev, "con%d: failed to register alt modes\n",
+			con->num);
+
 	/* Get the status */
 	UCSI_CMD_GET_CONNECTOR_STATUS(ctrl, con->num);
 	ret = ucsi_run_command(ucsi, &ctrl, &con->status, sizeof(con->status));
@@ -662,6 +873,16 @@ static int ucsi_register_port(struct ucsi *ucsi, int index)
 	if (con->status.connected)
 		ucsi_register_partner(con);
 
+	if (con->partner) {
+		ret = ucsi_register_altmodes(con, UCSI_RECIPIENT_SOP);
+		if (ret)
+			dev_err(ucsi->dev,
+				"con%d: failed to register alternate modes\n",
+				con->num);
+		else
+			ucsi_altmode_update_active(con);
+	}
+
 	trace_ucsi_register_port(con->num, &con->status);
 
 	return 0;
@@ -730,6 +951,7 @@ static void ucsi_init(struct work_struct *work)
 err_unregister:
 	for (con = ucsi->connector; con->port; con++) {
 		ucsi_unregister_partner(con);
+		ucsi_unregister_altmodes(con, UCSI_RECIPIENT_CON);
 		typec_unregister_port(con->port);
 		con->port = NULL;
 	}
@@ -788,17 +1010,15 @@ void ucsi_unregister_ppm(struct ucsi *ucsi)
 	/* Make sure that we are not in the middle of driver initialization */
 	cancel_work_sync(&ucsi->work);
 
-	mutex_lock(&ucsi->ppm_lock);
-
 	/* Disable everything except command complete notification */
 	UCSI_CMD_SET_NTFY_ENABLE(ctrl, UCSI_ENABLE_NTFY_CMD_COMPLETE)
-	ucsi_run_command(ucsi, &ctrl, NULL, 0);
-
-	mutex_unlock(&ucsi->ppm_lock);
+	ucsi_send_command(ucsi, &ctrl, NULL, 0);
 
 	for (i = 0; i < ucsi->cap.num_connectors; i++) {
 		cancel_work_sync(&ucsi->connector[i].work);
 		ucsi_unregister_partner(&ucsi->connector[i]);
+		ucsi_unregister_altmodes(&ucsi->connector[i],
+					 UCSI_RECIPIENT_CON);
 		typec_unregister_port(ucsi->connector[i].port);
 	}
 
diff --git a/drivers/usb/typec/ucsi/ucsi.h b/drivers/usb/typec/ucsi/ucsi.h
index 53b80f40a908..1e2981aef629 100644
--- a/drivers/usb/typec/ucsi/ucsi.h
+++ b/drivers/usb/typec/ucsi/ucsi.h
@@ -6,6 +6,7 @@
 #include <linux/bitops.h>
 #include <linux/device.h>
 #include <linux/types.h>
+#include <linux/usb/typec.h>
 
 /* -------------------------------------------------------------------------- */
 
@@ -60,6 +61,20 @@ struct ucsi_uor_cmd {
 	u16:6; /* reserved */
 } __packed;
 
+/* Get Alternate Modes Command structure */
+struct ucsi_altmode_cmd {
+	u8 cmd;
+	u8 length;
+	u8 recipient;
+#define UCSI_RECIPIENT_CON			0
+#define UCSI_RECIPIENT_SOP			1
+#define UCSI_RECIPIENT_SOP_P			2
+#define UCSI_RECIPIENT_SOP_PP			3
+	u8 con_num;
+	u8 offset;
+	u8 num_altmodes;
+} __packed;
+
 struct ucsi_control {
 	union {
 		u64 raw_cmd;
@@ -67,6 +82,7 @@ struct ucsi_control {
 		struct ucsi_uor_cmd uor;
 		struct ucsi_ack_cmd ack;
 		struct ucsi_con_rst con_rst;
+		struct ucsi_altmode_cmd alt;
 	};
 };
 
@@ -112,6 +128,30 @@ struct ucsi_control {
 	(_ctrl_).cmd.data = _con_;					\
 }
 
+/* Helper for preparing ucsi_control for GET_ALTERNATE_MODES command. */
+#define UCSI_CMD_GET_ALTERNATE_MODES(_ctrl_, _r_, _con_num_, _o_, _num_)\
+{									\
+	__UCSI_CMD((_ctrl_), UCSI_GET_ALTERNATE_MODES)			\
+	_ctrl_.alt.recipient = (_r_);					\
+	_ctrl_.alt.con_num = (_con_num_);				\
+	_ctrl_.alt.offset = (_o_);					\
+	_ctrl_.alt.num_altmodes = (_num_) - 1;				\
+}
+
+/* Helper for preparing ucsi_control for GET_CAM_SUPPORTED command. */
+#define UCSI_CMD_GET_CAM_SUPPORTED(_ctrl_, _con_)			\
+{									\
+	__UCSI_CMD((_ctrl_), UCSI_GET_CAM_SUPPORTED)			\
+	_ctrl_.cmd.data = (_con_);					\
+}
+
+/* Helper for preparing ucsi_control for GET_CAM_SUPPORTED command. */
+#define UCSI_CMD_GET_CURRENT_CAM(_ctrl_, _con_)			\
+{									\
+	__UCSI_CMD((_ctrl_), UCSI_GET_CURRENT_CAM)			\
+	_ctrl_.cmd.data = (_con_);					\
+}
+
 /* Helper for preparing ucsi_control for GET_CONNECTOR_STATUS command. */
 #define UCSI_CMD_GET_CONNECTOR_STATUS(_ctrl_, _con_)			\
 {									\
@@ -334,4 +374,82 @@ struct ucsi *ucsi_register_ppm(struct device *dev, struct ucsi_ppm *ppm);
 void ucsi_unregister_ppm(struct ucsi *ucsi);
 void ucsi_notify(struct ucsi *ucsi);
 
+/* -------------------------------------------------------------------------- */
+
+enum ucsi_status {
+	UCSI_IDLE = 0,
+	UCSI_BUSY,
+	UCSI_ERROR,
+};
+
+struct ucsi {
+	struct device *dev;
+	struct ucsi_ppm *ppm;
+
+	enum ucsi_status status;
+	struct completion complete;
+	struct ucsi_capability cap;
+	struct ucsi_connector *connector;
+
+	struct work_struct work;
+
+	/* PPM Communication lock */
+	struct mutex ppm_lock;
+
+	/* PPM communication flags */
+	unsigned long flags;
+#define EVENT_PENDING	0
+#define COMMAND_PENDING	1
+#define ACK_PENDING	2
+};
+
+#define UCSI_MAX_SVID		5
+#define UCSI_MAX_ALTMODES	(UCSI_MAX_SVID * 6)
+
+struct ucsi_connector {
+	int num;
+
+	struct ucsi *ucsi;
+	struct mutex lock; /* port lock */
+	struct work_struct work;
+	struct completion complete;
+
+	struct typec_port *port;
+	struct typec_partner *partner;
+
+	struct typec_altmode *port_altmode[UCSI_MAX_ALTMODES];
+	struct typec_altmode *partner_altmode[UCSI_MAX_ALTMODES];
+
+	struct typec_capability typec_cap;
+
+	struct ucsi_connector_status status;
+	struct ucsi_connector_capability cap;
+};
+
+int ucsi_send_command(struct ucsi *ucsi, struct ucsi_control *ctrl,
+		      void *retval, size_t size);
+
+void ucsi_altmode_update_active(struct ucsi_connector *con);
+
+#if IS_ENABLED(CONFIG_TYPEC_DP_ALTMODE)
+struct typec_altmode *
+ucsi_register_displayport(struct ucsi_connector *con,
+			  bool override, int offset,
+			  struct typec_altmode_desc *desc);
+
+void ucsi_displayport_remove_partner(struct typec_altmode *adev);
+
+#else
+static inline struct typec_altmode *
+ucsi_register_displayport(struct ucsi_connector *con,
+			  bool override, int offset,
+			  struct typec_altmode_desc *desc)
+{
+	return NULL;
+}
+
+static inline void
+ucsi_displayport_remove_partner(struct typec_altmode *adev) { }
+#endif /* CONFIG_TYPEC_DP_ALTMODE */
+
 #endif /* __DRIVER_USB_TYPEC_UCSI_H */
diff --git a/drivers/usb/typec/ucsi/ucsi_ccg.c b/drivers/usb/typec/ucsi/ucsi_ccg.c
index de8a43bdff68..9d46aa9e4e35 100644
--- a/drivers/usb/typec/ucsi/ucsi_ccg.c
+++ b/drivers/usb/typec/ucsi/ucsi_ccg.c
@@ -9,6 +9,7 @@
  */
 #include <linux/acpi.h>
 #include <linux/delay.h>
+#include <linux/firmware.h>
 #include <linux/i2c.h>
 #include <linux/module.h>
 #include <linux/pci.h>
@@ -17,18 +18,172 @@
 #include <asm/unaligned.h>
 #include "ucsi.h"
 
+enum enum_fw_mode {
+	BOOT,   /* bootloader */
+	FW1,    /* FW partition-1 (contains secondary fw) */
+	FW2,    /* FW partition-2 (contains primary fw) */
+	FW_INVALID,
+};
+
+#define CCGX_RAB_DEVICE_MODE			0x0000
+#define CCGX_RAB_INTR_REG			0x0006
+#define  DEV_INT				BIT(0)
+#define  PORT0_INT				BIT(1)
+#define  PORT1_INT				BIT(2)
+#define  UCSI_READ_INT				BIT(7)
+#define CCGX_RAB_JUMP_TO_BOOT			0x0007
+#define  TO_BOOT				'J'
+#define  TO_ALT_FW				'A'
+#define CCGX_RAB_RESET_REQ			0x0008
+#define  RESET_SIG				'R'
+#define  CMD_RESET_I2C				0x0
+#define  CMD_RESET_DEV				0x1
+#define CCGX_RAB_ENTER_FLASHING			0x000A
+#define  FLASH_ENTER_SIG			'P'
+#define CCGX_RAB_VALIDATE_FW			0x000B
+#define CCGX_RAB_FLASH_ROW_RW			0x000C
+#define  FLASH_SIG				'F'
+#define  FLASH_RD_CMD				0x0
+#define  FLASH_WR_CMD				0x1
+#define  FLASH_FWCT1_WR_CMD			0x2
+#define  FLASH_FWCT2_WR_CMD			0x3
+#define  FLASH_FWCT_SIG_WR_CMD			0x4
+#define CCGX_RAB_READ_ALL_VER			0x0010
+#define CCGX_RAB_READ_FW2_VER			0x0020
+#define CCGX_RAB_UCSI_CONTROL			0x0039
+#define CCGX_RAB_UCSI_CONTROL_START		BIT(0)
+#define CCGX_RAB_UCSI_CONTROL_STOP		BIT(1)
+#define CCGX_RAB_UCSI_DATA_BLOCK(offset)	(0xf000 | ((offset) & 0xff))
+#define REG_FLASH_RW_MEM        0x0200
+#define DEV_REG_IDX				CCGX_RAB_DEVICE_MODE
+#define CCGX_RAB_PDPORT_ENABLE			0x002C
+#define  PDPORT_1		BIT(0)
+#define  PDPORT_2		BIT(1)
+#define CCGX_RAB_RESPONSE			0x007E
+#define  ASYNC_EVENT				BIT(7)
+
+/* CCGx events & async msg codes */
+#define RESET_COMPLETE		0x80
+#define EVENT_INDEX		RESET_COMPLETE
+#define PORT_CONNECT_DET	0x84
+#define PORT_DISCONNECT_DET	0x85
+#define ROLE_SWAP_COMPELETE	0x87
+
+/* ccg firmware */
+#define CYACD_LINE_SIZE         527
+#define CCG4_ROW_SIZE           256
+#define FW1_METADATA_ROW        0x1FF
+#define FW2_METADATA_ROW        0x1FE
+#define FW_CFG_TABLE_SIG_SIZE	256
+
+static int secondary_fw_min_ver = 41;
+
+enum enum_flash_mode {
+	SECONDARY_BL,	/* update secondary using bootloader */
+	PRIMARY,	/* update primary using secondary */
+	SECONDARY,	/* update secondary using primary */
+	FLASH_NOT_NEEDED,	/* update not required */
+	FLASH_INVALID,
+};
+
+static const char * const ccg_fw_names[] = {
+	"ccg_boot.cyacd",
+	"ccg_primary.cyacd",
+	"ccg_secondary.cyacd"
+};
+
+struct ccg_dev_info {
+#define CCG_DEVINFO_FWMODE_SHIFT (0)
+#define CCG_DEVINFO_FWMODE_MASK (0x3 << CCG_DEVINFO_FWMODE_SHIFT)
+#define CCG_DEVINFO_PDPORTS_SHIFT (2)
+#define CCG_DEVINFO_PDPORTS_MASK (0x3 << CCG_DEVINFO_PDPORTS_SHIFT)
+	u8 mode;
+	u8 bl_mode;
+	__le16 silicon_id;
+	__le16 bl_last_row;
+} __packed;
+
+struct version_format {
+	__le16 build;
+	u8 patch;
+	u8 ver;
+#define CCG_VERSION_MIN_SHIFT (0)
+#define CCG_VERSION_MIN_MASK (0xf << CCG_VERSION_MIN_SHIFT)
+#define CCG_VERSION_MAJ_SHIFT (4)
+#define CCG_VERSION_MAJ_MASK (0xf << CCG_VERSION_MAJ_SHIFT)
+} __packed;
+
+struct version_info {
+	struct version_format base;
+	struct version_format app;
+};
+
+struct fw_config_table {
+	u32 identity;
+	u16 table_size;
+	u8 fwct_version;
+	u8 is_key_change;
+	u8 guid[16];
+	struct version_format base;
+	struct version_format app;
+	u8 primary_fw_digest[32];
+	u32 key_exp_length;
+	u8 key_modulus[256];
+	u8 key_exp[4];
+};
+
+/* CCGx response codes */
+enum ccg_resp_code {
+	CMD_NO_RESP             = 0x00,
+	CMD_SUCCESS             = 0x02,
+	FLASH_DATA_AVAILABLE    = 0x03,
+	CMD_INVALID             = 0x05,
+	FLASH_UPDATE_FAIL       = 0x07,
+	INVALID_FW              = 0x08,
+	INVALID_ARG             = 0x09,
+	CMD_NOT_SUPPORT         = 0x0A,
+	TRANSACTION_FAIL        = 0x0C,
+	PD_CMD_FAIL             = 0x0D,
+	UNDEF_ERROR             = 0x0F,
+	INVALID_RESP		= 0x10,
+};
+
+#define CCG_EVENT_MAX	(EVENT_INDEX + 43)
+
+struct ccg_cmd {
+	u16 reg;
+	u32 data;
+	int len;
+	u32 delay; /* ms delay for cmd timeout  */
+};
+
+struct ccg_resp {
+	u8 code;
+	u8 length;
+};
+
 struct ucsi_ccg {
 	struct device *dev;
 	struct ucsi *ucsi;
 	struct ucsi_ppm ppm;
 	struct i2c_client *client;
-};
+	struct ccg_dev_info info;
+	/* version info for boot, primary and secondary */
+	struct version_info version[FW2 + 1];
+	/* CCG HPI communication flags */
+	unsigned long flags;
+#define RESET_PENDING	0
+#define DEV_CMD_PENDING	1
+	struct ccg_resp dev_resp;
+	u8 cmd_resp;
+	int port_num;
+	int irq;
+	struct work_struct work;
+	struct mutex lock; /* to sync between user and driver thread */
 
-#define CCGX_RAB_INTR_REG			0x06
-#define CCGX_RAB_UCSI_CONTROL			0x39
-#define CCGX_RAB_UCSI_CONTROL_START		BIT(0)
-#define CCGX_RAB_UCSI_CONTROL_STOP		BIT(1)
-#define CCGX_RAB_UCSI_DATA_BLOCK(offset)	(0xf000 | ((offset) & 0xff))
+	/* fw build with vendor information */
+	u16 fw_build;
+};
 
 static int ccg_read(struct ucsi_ccg *uc, u16 rab, u8 *data, u32 len)
 {
@@ -220,6 +375,687 @@ static irqreturn_t ccg_irq_handler(int irq, void *data)
 	return IRQ_HANDLED;
 }
 
+static int get_fw_info(struct ucsi_ccg *uc)
+{
+	int err;
+
+	err = ccg_read(uc, CCGX_RAB_READ_ALL_VER, (u8 *)(&uc->version),
+		       sizeof(uc->version));
+	if (err < 0)
+		return err;
+
+	err = ccg_read(uc, CCGX_RAB_DEVICE_MODE, (u8 *)(&uc->info),
+		       sizeof(uc->info));
+	if (err < 0)
+		return err;
+
+	return 0;
+}
+
+static inline bool invalid_async_evt(int code)
+{
+	return (code >= CCG_EVENT_MAX) || (code < EVENT_INDEX);
+}
+
+static void ccg_process_response(struct ucsi_ccg *uc)
+{
+	struct device *dev = uc->dev;
+
+	if (uc->dev_resp.code & ASYNC_EVENT) {
+		if (uc->dev_resp.code == RESET_COMPLETE) {
+			if (test_bit(RESET_PENDING, &uc->flags))
+				uc->cmd_resp = uc->dev_resp.code;
+			get_fw_info(uc);
+		}
+		if (invalid_async_evt(uc->dev_resp.code))
+			dev_err(dev, "invalid async evt %d\n",
+				uc->dev_resp.code);
+	} else {
+		if (test_bit(DEV_CMD_PENDING, &uc->flags)) {
+			uc->cmd_resp = uc->dev_resp.code;
+			clear_bit(DEV_CMD_PENDING, &uc->flags);
+		} else {
+			dev_err(dev, "dev resp 0x%04x but no cmd pending\n",
+				uc->dev_resp.code);
+		}
+	}
+}
+
+static int ccg_read_response(struct ucsi_ccg *uc)
+{
+	unsigned long target = jiffies + msecs_to_jiffies(1000);
+	struct device *dev = uc->dev;
+	u8 intval;
+	int status;
+
+	/* wait for interrupt status to get updated */
+	do {
+		status = ccg_read(uc, CCGX_RAB_INTR_REG, &intval,
+				  sizeof(intval));
+		if (status < 0)
+			return status;
+
+		if (intval & DEV_INT)
+			break;
+		usleep_range(500, 600);
+	} while (time_is_after_jiffies(target));
+
+	if (time_is_before_jiffies(target)) {
+		dev_err(dev, "response timeout error\n");
+		return -ETIME;
+	}
+
+	status = ccg_read(uc, CCGX_RAB_RESPONSE, (u8 *)&uc->dev_resp,
+			  sizeof(uc->dev_resp));
+	if (status < 0)
+		return status;
+
+	status = ccg_write(uc, CCGX_RAB_INTR_REG, &intval, sizeof(intval));
+	if (status < 0)
+		return status;
+
+	return 0;
+}
+
+/* Caller must hold uc->lock */
+static int ccg_send_command(struct ucsi_ccg *uc, struct ccg_cmd *cmd)
+{
+	struct device *dev = uc->dev;
+	int ret;
+
+	switch (cmd->reg & 0xF000) {
+	case DEV_REG_IDX:
+		set_bit(DEV_CMD_PENDING, &uc->flags);
+		break;
+	default:
+		dev_err(dev, "invalid cmd register\n");
+		break;
+	}
+
+	ret = ccg_write(uc, cmd->reg, (u8 *)&cmd->data, cmd->len);
+	if (ret < 0)
+		return ret;
+
+	msleep(cmd->delay);
+
+	ret = ccg_read_response(uc);
+	if (ret < 0) {
+		dev_err(dev, "response read error\n");
+		switch (cmd->reg & 0xF000) {
+		case DEV_REG_IDX:
+			clear_bit(DEV_CMD_PENDING, &uc->flags);
+			break;
+		default:
+			dev_err(dev, "invalid cmd register\n");
+			break;
+		}
+		return -EIO;
+	}
+	ccg_process_response(uc);
+
+	return uc->cmd_resp;
+}
+
+static int ccg_cmd_enter_flashing(struct ucsi_ccg *uc)
+{
+	struct ccg_cmd cmd;
+	int ret;
+
+	cmd.reg = CCGX_RAB_ENTER_FLASHING;
+	cmd.data = FLASH_ENTER_SIG;
+	cmd.len = 1;
+	cmd.delay = 50;
+
+	mutex_lock(&uc->lock);
+
+	ret = ccg_send_command(uc, &cmd);
+
+	mutex_unlock(&uc->lock);
+
+	if (ret != CMD_SUCCESS) {
+		dev_err(uc->dev, "enter flashing failed ret=%d\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int ccg_cmd_reset(struct ucsi_ccg *uc)
+{
+	struct ccg_cmd cmd;
+	u8 *p;
+	int ret;
+
+	p = (u8 *)&cmd.data;
+	cmd.reg = CCGX_RAB_RESET_REQ;
+	p[0] = RESET_SIG;
+	p[1] = CMD_RESET_DEV;
+	cmd.len = 2;
+	cmd.delay = 5000;
+
+	mutex_lock(&uc->lock);
+
+	set_bit(RESET_PENDING, &uc->flags);
+
+	ret = ccg_send_command(uc, &cmd);
+	if (ret != RESET_COMPLETE)
+		goto err_clear_flag;
+
+	ret = 0;
+
+err_clear_flag:
+	clear_bit(RESET_PENDING, &uc->flags);
+
+	mutex_unlock(&uc->lock);
+
+	return ret;
+}
+
+static int ccg_cmd_port_control(struct ucsi_ccg *uc, bool enable)
+{
+	struct ccg_cmd cmd;
+	int ret;
+
+	cmd.reg = CCGX_RAB_PDPORT_ENABLE;
+	if (enable)
+		cmd.data = (uc->port_num == 1) ?
+			    PDPORT_1 : (PDPORT_1 | PDPORT_2);
+	else
+		cmd.data = 0x0;
+	cmd.len = 1;
+	cmd.delay = 10;
+
+	mutex_lock(&uc->lock);
+
+	ret = ccg_send_command(uc, &cmd);
+
+	mutex_unlock(&uc->lock);
+
+	if (ret != CMD_SUCCESS) {
+		dev_err(uc->dev, "port control failed ret=%d\n", ret);
+		return ret;
+	}
+	return 0;
+}
+
+static int ccg_cmd_jump_boot_mode(struct ucsi_ccg *uc, int bl_mode)
+{
+	struct ccg_cmd cmd;
+	int ret;
+
+	cmd.reg = CCGX_RAB_JUMP_TO_BOOT;
+
+	if (bl_mode)
+		cmd.data = TO_BOOT;
+	else
+		cmd.data = TO_ALT_FW;
+
+	cmd.len = 1;
+	cmd.delay = 100;
+
+	mutex_lock(&uc->lock);
+
+	set_bit(RESET_PENDING, &uc->flags);
+
+	ret = ccg_send_command(uc, &cmd);
+	if (ret != RESET_COMPLETE)
+		goto err_clear_flag;
+
+	ret = 0;
+
+err_clear_flag:
+	clear_bit(RESET_PENDING, &uc->flags);
+
+	mutex_unlock(&uc->lock);
+
+	return ret;
+}
+
+static int
+ccg_cmd_write_flash_row(struct ucsi_ccg *uc, u16 row,
+			const void *data, u8 fcmd)
+{
+	struct i2c_client *client = uc->client;
+	struct ccg_cmd cmd;
+	u8 buf[CCG4_ROW_SIZE + 2];
+	u8 *p;
+	int ret;
+
+	/* Copy the data into the flash read/write memory. */
+	put_unaligned_le16(REG_FLASH_RW_MEM, buf);
+
+	memcpy(buf + 2, data, CCG4_ROW_SIZE);
+
+	mutex_lock(&uc->lock);
+
+	ret = i2c_master_send(client, buf, CCG4_ROW_SIZE + 2);
+	if (ret != CCG4_ROW_SIZE + 2) {
+		dev_err(uc->dev, "REG_FLASH_RW_MEM write fail %d\n", ret);
+		mutex_unlock(&uc->lock);
+		return ret < 0 ? ret : -EIO;
+	}
+
+	/* Use the FLASH_ROW_READ_WRITE register to trigger */
+	/* writing of data to the desired flash row */
+	p = (u8 *)&cmd.data;
+	cmd.reg = CCGX_RAB_FLASH_ROW_RW;
+	p[0] = FLASH_SIG;
+	p[1] = fcmd;
+	put_unaligned_le16(row, &p[2]);
+	cmd.len = 4;
+	cmd.delay = 50;
+	if (fcmd == FLASH_FWCT_SIG_WR_CMD)
+		cmd.delay += 400;
+	if (row == 510)
+		cmd.delay += 220;
+	ret = ccg_send_command(uc, &cmd);
+
+	mutex_unlock(&uc->lock);
+
+	if (ret != CMD_SUCCESS) {
+		dev_err(uc->dev, "write flash row failed ret=%d\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int ccg_cmd_validate_fw(struct ucsi_ccg *uc, unsigned int fwid)
+{
+	struct ccg_cmd cmd;
+	int ret;
+
+	cmd.reg = CCGX_RAB_VALIDATE_FW;
+	cmd.data = fwid;
+	cmd.len = 1;
+	cmd.delay = 500;
+
+	mutex_lock(&uc->lock);
+
+	ret = ccg_send_command(uc, &cmd);
+
+	mutex_unlock(&uc->lock);
+
+	if (ret != CMD_SUCCESS)
+		return ret;
+
+	return 0;
+}
+
+static bool ccg_check_vendor_version(struct ucsi_ccg *uc,
+				     struct version_format *app,
+				     struct fw_config_table *fw_cfg)
+{
+	struct device *dev = uc->dev;
+
+	/* Check if the fw build is for supported vendors */
+	if (le16_to_cpu(app->build) != uc->fw_build) {
+		dev_info(dev, "current fw is not from supported vendor\n");
+		return false;
+	}
+
+	/* Check if the new fw build is for supported vendors */
+	if (le16_to_cpu(fw_cfg->app.build) != uc->fw_build) {
+		dev_info(dev, "new fw is not from supported vendor\n");
+		return false;
+	}
+	return true;
+}
+
+static bool ccg_check_fw_version(struct ucsi_ccg *uc, const char *fw_name,
+				 struct version_format *app)
+{
+	const struct firmware *fw = NULL;
+	struct device *dev = uc->dev;
+	struct fw_config_table fw_cfg;
+	u32 cur_version, new_version;
+	bool is_later = false;
+
+	if (request_firmware(&fw, fw_name, dev) != 0) {
+		dev_err(dev, "error: Failed to open cyacd file %s\n", fw_name);
+		return false;
+	}
+
+	/*
+	 * check if signed fw
+	 * last part of fw image is fw cfg table and signature
+	 */
+	if (fw->size < sizeof(fw_cfg) + FW_CFG_TABLE_SIG_SIZE)
+		goto out_release_firmware;
+
+	memcpy((uint8_t *)&fw_cfg, fw->data + fw->size -
+	       sizeof(fw_cfg) - FW_CFG_TABLE_SIG_SIZE, sizeof(fw_cfg));
+
+	if (fw_cfg.identity != ('F' | 'W' << 8 | 'C' << 16 | 'T' << 24)) {
+		dev_info(dev, "not a signed image\n");
+		goto out_release_firmware;
+	}
+
+	/* compare input version with FWCT version */
+	cur_version = le16_to_cpu(app->build) | app->patch << 16 |
+			app->ver << 24;
+
+	new_version = le16_to_cpu(fw_cfg.app.build) | fw_cfg.app.patch << 16 |
+			fw_cfg.app.ver << 24;
+
+	if (!ccg_check_vendor_version(uc, app, &fw_cfg))
+		goto out_release_firmware;
+
+	if (new_version > cur_version)
+		is_later = true;
+
+out_release_firmware:
+	release_firmware(fw);
+	return is_later;
+}
+
+static int ccg_fw_update_needed(struct ucsi_ccg *uc,
+				enum enum_flash_mode *mode)
+{
+	struct device *dev = uc->dev;
+	int err;
+	struct version_info version[3];
+
+	err = ccg_read(uc, CCGX_RAB_DEVICE_MODE, (u8 *)(&uc->info),
+		       sizeof(uc->info));
+	if (err) {
+		dev_err(dev, "read device mode failed\n");
+		return err;
+	}
+
+	err = ccg_read(uc, CCGX_RAB_READ_ALL_VER, (u8 *)version,
+		       sizeof(version));
+	if (err) {
+		dev_err(dev, "read device mode failed\n");
+		return err;
+	}
+
+	if (memcmp(&version[FW1], "\0\0\0\0\0\0\0\0",
+		   sizeof(struct version_info)) == 0) {
+		dev_info(dev, "secondary fw is not flashed\n");
+		*mode = SECONDARY_BL;
+	} else if (le16_to_cpu(version[FW1].base.build) <
+		secondary_fw_min_ver) {
+		dev_info(dev, "secondary fw version is too low (< %d)\n",
+			 secondary_fw_min_ver);
+		*mode = SECONDARY;
+	} else if (memcmp(&version[FW2], "\0\0\0\0\0\0\0\0",
+		   sizeof(struct version_info)) == 0) {
+		dev_info(dev, "primary fw is not flashed\n");
+		*mode = PRIMARY;
+	} else if (ccg_check_fw_version(uc, ccg_fw_names[PRIMARY],
+		   &version[FW2].app)) {
+		dev_info(dev, "found primary fw with later version\n");
+		*mode = PRIMARY;
+	} else {
+		dev_info(dev, "secondary and primary fw are the latest\n");
+		*mode = FLASH_NOT_NEEDED;
+	}
+	return 0;
+}
+
+static int do_flash(struct ucsi_ccg *uc, enum enum_flash_mode mode)
+{
+	struct device *dev = uc->dev;
+	const struct firmware *fw = NULL;
+	const char *p, *s;
+	const char *eof;
+	int err, row, len, line_sz, line_cnt = 0;
+	unsigned long start_time = jiffies;
+	struct fw_config_table  fw_cfg;
+	u8 fw_cfg_sig[FW_CFG_TABLE_SIG_SIZE];
+	u8 *wr_buf;
+
+	err = request_firmware(&fw, ccg_fw_names[mode], dev);
+	if (err) {
+		dev_err(dev, "request %s failed err=%d\n",
+			ccg_fw_names[mode], err);
+		return err;
+	}
+
+	if (((uc->info.mode & CCG_DEVINFO_FWMODE_MASK) >>
+			CCG_DEVINFO_FWMODE_SHIFT) == FW2) {
+		err = ccg_cmd_port_control(uc, false);
+		if (err < 0)
+			goto release_fw;
+		err = ccg_cmd_jump_boot_mode(uc, 0);
+		if (err < 0)
+			goto release_fw;
+	}
+
+	eof = fw->data + fw->size;
+
+	/*
+	 * check if signed fw
+	 * last part of fw image is fw cfg table and signature
+	 */
+	if (fw->size < sizeof(fw_cfg) + sizeof(fw_cfg_sig))
+		goto not_signed_fw;
+
+	memcpy((uint8_t *)&fw_cfg, fw->data + fw->size -
+	       sizeof(fw_cfg) - sizeof(fw_cfg_sig), sizeof(fw_cfg));
+
+	if (fw_cfg.identity != ('F' | ('W' << 8) | ('C' << 16) | ('T' << 24))) {
+		dev_info(dev, "not a signed image\n");
+		goto not_signed_fw;
+	}
+	eof = fw->data + fw->size - sizeof(fw_cfg) - sizeof(fw_cfg_sig);
+
+	memcpy((uint8_t *)&fw_cfg_sig,
+	       fw->data + fw->size - sizeof(fw_cfg_sig), sizeof(fw_cfg_sig));
+
+	/* flash fw config table and signature first */
+	err = ccg_cmd_write_flash_row(uc, 0, (u8 *)&fw_cfg,
+				      FLASH_FWCT1_WR_CMD);
+	if (err)
+		goto release_fw;
+
+	err = ccg_cmd_write_flash_row(uc, 0, (u8 *)&fw_cfg + CCG4_ROW_SIZE,
+				      FLASH_FWCT2_WR_CMD);
+	if (err)
+		goto release_fw;
+
+	err = ccg_cmd_write_flash_row(uc, 0, &fw_cfg_sig,
+				      FLASH_FWCT_SIG_WR_CMD);
+	if (err)
+		goto release_fw;
+
+not_signed_fw:
+	wr_buf = kzalloc(CCG4_ROW_SIZE + 4, GFP_KERNEL);
+	if (!wr_buf)
+		return -ENOMEM;
+
+	err = ccg_cmd_enter_flashing(uc);
+	if (err)
+		goto release_mem;
+
+	/*****************************************************************
+	 * CCG firmware image (.cyacd) file line format
+	 *
+	 * :00rrrrllll[dd....]cc/r/n
+	 *
+	 * :00   header
+	 * rrrr is row number to flash				(4 char)
+	 * llll is data len to flash				(4 char)
+	 * dd   is a data field represents one byte of data	(512 char)
+	 * cc   is checksum					(2 char)
+	 * \r\n newline
+	 *
+	 * Total length: 3 + 4 + 4 + 512 + 2 + 2 = 527
+	 *
+	 *****************************************************************/
+
+	p = strnchr(fw->data, fw->size, ':');
+	while (p < eof) {
+		s = strnchr(p + 1, eof - p - 1, ':');
+
+		if (!s)
+			s = eof;
+
+		line_sz = s - p;
+
+		if (line_sz != CYACD_LINE_SIZE) {
+			dev_err(dev, "Bad FW format line_sz=%d\n", line_sz);
+			err =  -EINVAL;
+			goto release_mem;
+		}
+
+		if (hex2bin(wr_buf, p + 3, CCG4_ROW_SIZE + 4)) {
+			err =  -EINVAL;
+			goto release_mem;
+		}
+
+		row = get_unaligned_be16(wr_buf);
+		len = get_unaligned_be16(&wr_buf[2]);
+
+		if (len != CCG4_ROW_SIZE) {
+			err =  -EINVAL;
+			goto release_mem;
+		}
+
+		err = ccg_cmd_write_flash_row(uc, row, wr_buf + 4,
+					      FLASH_WR_CMD);
+		if (err)
+			goto release_mem;
+
+		line_cnt++;
+		p = s;
+	}
+
+	dev_info(dev, "total %d row flashed. time: %dms\n",
+		 line_cnt, jiffies_to_msecs(jiffies - start_time));
+
+	err = ccg_cmd_validate_fw(uc, (mode == PRIMARY) ? FW2 :  FW1);
+	if (err)
+		dev_err(dev, "%s validation failed err=%d\n",
+			(mode == PRIMARY) ? "FW2" :  "FW1", err);
+	else
+		dev_info(dev, "%s validated\n",
+			 (mode == PRIMARY) ? "FW2" :  "FW1");
+
+	err = ccg_cmd_port_control(uc, false);
+	if (err < 0)
+		goto release_mem;
+
+	err = ccg_cmd_reset(uc);
+	if (err < 0)
+		goto release_mem;
+
+	err = ccg_cmd_port_control(uc, true);
+	if (err < 0)
+		goto release_mem;
+
+release_mem:
+	kfree(wr_buf);
+
+release_fw:
+	release_firmware(fw);
+	return err;
+}
+
+/*******************************************************************************
+ * CCG4 has two copies of the firmware in addition to the bootloader.
+ * If the device is running FW1, FW2 can be updated with the new version.
+ * Dual firmware mode allows the CCG device to stay in a PD contract and support
+ * USB PD and Type-C functionality while a firmware update is in progress.
+ ******************************************************************************/
+static int ccg_fw_update(struct ucsi_ccg *uc, enum enum_flash_mode flash_mode)
+{
+	int err;
+
+	while (flash_mode != FLASH_NOT_NEEDED) {
+		err = do_flash(uc, flash_mode);
+		if (err < 0)
+			return err;
+		err = ccg_fw_update_needed(uc, &flash_mode);
+		if (err < 0)
+			return err;
+	}
+	dev_info(uc->dev, "CCG FW update successful\n");
+
+	return err;
+}
+
+static int ccg_restart(struct ucsi_ccg *uc)
+{
+	struct device *dev = uc->dev;
+	int status;
+
+	status = ucsi_ccg_init(uc);
+	if (status < 0) {
+		dev_err(dev, "ucsi_ccg_start fail, err=%d\n", status);
+		return status;
+	}
+
+	status = request_threaded_irq(uc->irq, NULL, ccg_irq_handler,
+				      IRQF_ONESHOT | IRQF_TRIGGER_HIGH,
+				      dev_name(dev), uc);
+	if (status < 0) {
+		dev_err(dev, "request_threaded_irq failed - %d\n", status);
+		return status;
+	}
+
+	uc->ucsi = ucsi_register_ppm(dev, &uc->ppm);
+	if (IS_ERR(uc->ucsi)) {
+		dev_err(uc->dev, "ucsi_register_ppm failed\n");
+		return PTR_ERR(uc->ucsi);
+	}
+
+	return 0;
+}
+
+static void ccg_update_firmware(struct work_struct *work)
+{
+	struct ucsi_ccg *uc = container_of(work, struct ucsi_ccg, work);
+	enum enum_flash_mode flash_mode;
+	int status;
+
+	status = ccg_fw_update_needed(uc, &flash_mode);
+	if (status < 0)
+		return;
+
+	if (flash_mode != FLASH_NOT_NEEDED) {
+		ucsi_unregister_ppm(uc->ucsi);
+		free_irq(uc->irq, uc);
+
+		ccg_fw_update(uc, flash_mode);
+		ccg_restart(uc);
+	}
+}
+
+static ssize_t do_flash_store(struct device *dev,
+			      struct device_attribute *attr,
+			      const char *buf, size_t n)
+{
+	struct ucsi_ccg *uc = i2c_get_clientdata(to_i2c_client(dev));
+	bool flash;
+
+	if (kstrtobool(buf, &flash))
+		return -EINVAL;
+
+	if (!flash)
+		return n;
+
+	if (uc->fw_build == 0x0) {
+		dev_err(dev, "fail to flash FW due to missing FW build info\n");
+		return -EINVAL;
+	}
+
+	schedule_work(&uc->work);
+	return n;
+}
+
+static DEVICE_ATTR_WO(do_flash);
+
+static struct attribute *ucsi_ccg_sysfs_attrs[] = {
+	&dev_attr_do_flash.attr,
+	NULL,
+};
+
+static struct attribute_group ucsi_ccg_attr_group = {
+	.attrs = ucsi_ccg_sysfs_attrs,
+};
+
 static int ucsi_ccg_probe(struct i2c_client *client,
 			  const struct i2c_device_id *id)
 {
@@ -240,6 +1076,14 @@ static int ucsi_ccg_probe(struct i2c_client *client,
 	uc->ppm.sync = ucsi_ccg_sync;
 	uc->dev = dev;
 	uc->client = client;
+	mutex_init(&uc->lock);
+	INIT_WORK(&uc->work, ccg_update_firmware);
+
+	/* Only fail FW flashing when FW build information is not provided */
+	status = device_property_read_u16(dev, "ccgx,firmware-build",
+					  &uc->fw_build);
+	if (status)
+		dev_err(uc->dev, "failed to get FW build information\n");
 
 	/* reset ccg device and initialize ucsi */
 	status = ucsi_ccg_init(uc);
@@ -248,15 +1092,27 @@ static int ucsi_ccg_probe(struct i2c_client *client,
 		return status;
 	}
 
-	status = devm_request_threaded_irq(dev, client->irq, NULL,
-					   ccg_irq_handler,
-					   IRQF_ONESHOT | IRQF_TRIGGER_HIGH,
-					   dev_name(dev), uc);
+	status = get_fw_info(uc);
+	if (status < 0) {
+		dev_err(uc->dev, "get_fw_info failed - %d\n", status);
+		return status;
+	}
+
+	uc->port_num = 1;
+
+	if (uc->info.mode & CCG_DEVINFO_PDPORTS_MASK)
+		uc->port_num++;
+
+	status = request_threaded_irq(client->irq, NULL, ccg_irq_handler,
+				      IRQF_ONESHOT | IRQF_TRIGGER_HIGH,
+				      dev_name(dev), uc);
 	if (status < 0) {
 		dev_err(uc->dev, "request_threaded_irq failed - %d\n", status);
 		return status;
 	}
 
+	uc->irq = client->irq;
+
 	uc->ucsi = ucsi_register_ppm(dev, &uc->ppm);
 	if (IS_ERR(uc->ucsi)) {
 		dev_err(uc->dev, "ucsi_register_ppm failed\n");
@@ -273,6 +1129,11 @@ static int ucsi_ccg_probe(struct i2c_client *client,
 	}
 
 	i2c_set_clientdata(client, uc);
+
+	status = sysfs_create_group(&uc->dev->kobj, &ucsi_ccg_attr_group);
+	if (status)
+		dev_err(uc->dev, "cannot create sysfs group: %d\n", status);
+
 	return 0;
 }
 
@@ -280,7 +1141,10 @@ static int ucsi_ccg_remove(struct i2c_client *client)
 {
 	struct ucsi_ccg *uc = i2c_get_clientdata(client);
 
+	cancel_work_sync(&uc->work);
 	ucsi_unregister_ppm(uc->ucsi);
+	free_irq(uc->irq, uc);
+	sysfs_remove_group(&uc->dev->kobj, &ucsi_ccg_attr_group);
 
 	return 0;
 }
diff --git a/drivers/usb/usbip/stub_rx.c b/drivers/usb/usbip/stub_rx.c
index dbfb2f24d71e..b0a855acafa3 100644
--- a/drivers/usb/usbip/stub_rx.c
+++ b/drivers/usb/usbip/stub_rx.c
@@ -17,9 +17,9 @@ static int is_clear_halt_cmd(struct urb *urb)
 
 	req = (struct usb_ctrlrequest *) urb->setup_packet;
 
-	 return (req->bRequest == USB_REQ_CLEAR_FEATURE) &&
-		 (req->bRequestType == USB_RECIP_ENDPOINT) &&
-		 (req->wValue == USB_ENDPOINT_HALT);
+	return (req->bRequest == USB_REQ_CLEAR_FEATURE) &&
+	       (req->bRequestType == USB_RECIP_ENDPOINT) &&
+	       (req->wValue == USB_ENDPOINT_HALT);
 }
 
 static int is_set_interface_cmd(struct urb *urb)
diff --git a/drivers/usb/usbip/vhci_hcd.c b/drivers/usb/usbip/vhci_hcd.c
index f46ee1fefe02..000ab7225717 100644
--- a/drivers/usb/usbip/vhci_hcd.c
+++ b/drivers/usb/usbip/vhci_hcd.c
@@ -508,6 +508,7 @@ static int vhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
 		case USB_PORT_FEAT_U1_TIMEOUT:
 			usbip_dbg_vhci_rh(
 				" SetPortFeature: USB_PORT_FEAT_U1_TIMEOUT\n");
+			/* Fall through */
 		case USB_PORT_FEAT_U2_TIMEOUT:
 			usbip_dbg_vhci_rh(
 				" SetPortFeature: USB_PORT_FEAT_U2_TIMEOUT\n");
@@ -654,15 +655,9 @@ error:
 static void vhci_tx_urb(struct urb *urb, struct vhci_device *vdev)
 {
 	struct vhci_priv *priv;
-	struct vhci_hcd *vhci_hcd;
+	struct vhci_hcd *vhci_hcd = vdev_to_vhci_hcd(vdev);
 	unsigned long flags;
 
-	if (!vdev) {
-		pr_err("could not get virtual device");
-		return;
-	}
-	vhci_hcd = vdev_to_vhci_hcd(vdev);
-
 	priv = kzalloc(sizeof(struct vhci_priv), GFP_ATOMIC);
 	if (!priv) {
 		usbip_event_add(&vdev->ud, VDEV_EVENT_ERROR_MALLOC);
author	Linus Torvalds <torvalds@linux-foundation.org>	2019-05-08 19:03:52 +0200
committer	Linus Torvalds <torvalds@linux-foundation.org>	2019-05-08 19:03:52 +0200
commit	132d68d37d33f1d0b9c1f507c8b4d64c27ecec8a (patch)
tree	b3c05972e5579e1574873fe745fb1358c62a269c /drivers/usb
parent	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next (diff)
parent	Merge tag 'usb-for-v5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/bal... (diff)
download	linux-132d68d37d33f1d0b9c1f507c8b4d64c27ecec8a.tar.xz linux-132d68d37d33f1d0b9c1f507c8b4d64c27ecec8a.zip