Merge tag 'char-misc-3.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull char / misc patches from Greg KH:
 "Here's the big char/misc driver update for 3.20-rc1.

  Lots of little things in here, all described in the changelog.
  Nothing major or unusual, except maybe the binder selinux stuff, which
  was all acked by the proper selinux people and they thought it best to
  come through this tree.

  All of this has been in linux-next with no reported issues for a while"

* tag 'char-misc-3.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (90 commits)
  coresight: fix function etm_writel_cp14() parameter order
  coresight-etm: remove check for unknown Kconfig macro
  coresight: fixing CPU hwid lookup in device tree
  coresight: remove the unnecessary function coresight_is_bit_set()
  coresight: fix the debug AMBA bus name
  coresight: remove the extra spaces
  coresight: fix the link between orphan connection and newly added device
  coresight: remove the unnecessary replicator property
  coresight: fix the replicator subtype value
  pdfdocs: Fix 'make pdfdocs' failure for 'uio-howto.tmpl'
  mcb: Fix error path of mcb_pci_probe
  virtio/console: verify device has config space
  ti-st: clean up data types (fix harmless memory corruption)
  mei: me: release hw from reset only during the reset flow
  mei: mask interrupt set bit on clean reset bit
  extcon: max77693: Constify struct regmap_config
  extcon: adc-jack: Release IIO channel on driver remove
  extcon: Remove duplicated include from extcon-class.c
  Drivers: hv: vmbus: hv_process_timer_expiration() can be static
  Drivers: hv: vmbus: serialize Offer and Rescind offer
  ...

4 files changed, 522 insertions, 1 deletions

diff --git a/drivers/uio/Kconfig b/drivers/uio/Kconfig
index 5a90914d856d..8a15c323c030 100644
--- a/drivers/uio/Kconfig
+++ b/drivers/uio/Kconfig
@@ -104,6 +104,26 @@ config UIO_NETX
 	  To compile this driver as a module, choose M here; the module
 	  will be called uio_netx.
 
+config UIO_FSL_ELBC_GPCM
+	tristate "eLBC/GPCM driver"
+	depends on FSL_LBC
+	help
+	  Generic driver for accessing a peripheral connected to an eLBC port
+	  that is running in GPCM mode. GPCM is an interface for simple lower
+	  performance memories and memory-mapped devices. For devices using
+	  FCM or UPM eLBC modes, other device-specific drivers are available.
+
+config UIO_FSL_ELBC_GPCM_NETX5152
+	bool "eLBC/GPCM netX 51/52 support"
+	depends on UIO_FSL_ELBC_GPCM
+	help
+	  This will add support for netX 51/52 devices connected via eLBC/GPCM.
+	  In particular, it implements interrupt handling. This can be used
+	  together with the userspace netX stack from Hilscher.
+
+	  Information about this hardware can be found at:
+	  http://www.hilscher.com/netx
+
 config UIO_PRUSS
 	tristate "Texas Instruments PRUSS driver"
 	depends on ARCH_DAVINCI_DA850
diff --git a/drivers/uio/Makefile b/drivers/uio/Makefile
index d3218bde3aeb..8560dad52d0f 100644
--- a/drivers/uio/Makefile
+++ b/drivers/uio/Makefile
@@ -8,3 +8,4 @@ obj-$(CONFIG_UIO_PCI_GENERIC)	+= uio_pci_generic.o
 obj-$(CONFIG_UIO_NETX)	+= uio_netx.o
 obj-$(CONFIG_UIO_PRUSS)         += uio_pruss.o
 obj-$(CONFIG_UIO_MF624)         += uio_mf624.o
+obj-$(CONFIG_UIO_FSL_ELBC_GPCM)	+= uio_fsl_elbc_gpcm.o
diff --git a/drivers/uio/uio_fsl_elbc_gpcm.c b/drivers/uio/uio_fsl_elbc_gpcm.c
new file mode 100644
index 000000000000..b6cac91c2ced
--- /dev/null
+++ b/drivers/uio/uio_fsl_elbc_gpcm.c
@@ -0,0 +1,499 @@
+/* uio_fsl_elbc_gpcm: UIO driver for eLBC/GPCM peripherals
+
+   Copyright (C) 2014 Linutronix GmbH
+     Author: John Ogness <john.ogness@linutronix.de>
+
+   This driver provides UIO access to memory of a peripheral connected
+   to the Freescale enhanced local bus controller (eLBC) interface
+   using the general purpose chip-select mode (GPCM).
+
+   Here is an example of the device tree entries:
+
+	localbus@ffe05000 {
+		ranges = <0x2 0x0 0x0 0xff810000 0x10000>;
+
+		dpm@2,0 {
+			compatible = "fsl,elbc-gpcm-uio";
+			reg = <0x2 0x0 0x10000>;
+			elbc-gpcm-br = <0xff810800>;
+			elbc-gpcm-or = <0xffff09f7>;
+			interrupt-parent = <&mpic>;
+			interrupts = <4 1>;
+			device_type = "netx5152";
+			uio_name = "netx_custom";
+			netx5152,init-win0-offset = <0x0>;
+		};
+	};
+
+   Only the entries reg (to identify bank) and elbc-gpcm-* (initial BR/OR
+   values) are required. The entries interrupt*, device_type, and uio_name
+   are optional (as well as any type-specific options such as
+   netx5152,init-win0-offset). As long as no interrupt handler is needed,
+   this driver can be used without any type-specific implementation.
+
+   The netx5152 type has been tested to work with the netX 51/52 hardware
+   from Hilscher using the Hilscher userspace netX stack.
+
+   The netx5152 type should serve as a model to add new type-specific
+   devices as needed.
+*/
+
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+#include <linux/platform_device.h>
+#include <linux/uio_driver.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+
+#include <asm/fsl_lbc.h>
+
+#define MAX_BANKS 8
+
+struct fsl_elbc_gpcm {
+	struct device *dev;
+	struct fsl_lbc_regs __iomem *lbc;
+	u32 bank;
+	const char *name;
+
+	void (*init)(struct uio_info *info);
+	void (*shutdown)(struct uio_info *info, bool init_err);
+	irqreturn_t (*irq_handler)(int irq, struct uio_info *info);
+};
+
+static ssize_t reg_show(struct device *dev, struct device_attribute *attr,
+			char *buf);
+static ssize_t reg_store(struct device *dev, struct device_attribute *attr,
+			 const char *buf, size_t count);
+
+DEVICE_ATTR(reg_br, S_IRUGO|S_IWUSR|S_IWGRP, reg_show, reg_store);
+DEVICE_ATTR(reg_or, S_IRUGO|S_IWUSR|S_IWGRP, reg_show, reg_store);
+
+static ssize_t reg_show(struct device *dev, struct device_attribute *attr,
+			char *buf)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct uio_info *info = platform_get_drvdata(pdev);
+	struct fsl_elbc_gpcm *priv = info->priv;
+	struct fsl_lbc_bank *bank = &priv->lbc->bank[priv->bank];
+
+	if (attr == &dev_attr_reg_br) {
+		return scnprintf(buf, PAGE_SIZE, "0x%08x\n",
+				 in_be32(&bank->br));
+
+	} else if (attr == &dev_attr_reg_or) {
+		return scnprintf(buf, PAGE_SIZE, "0x%08x\n",
+				 in_be32(&bank->or));
+	}
+
+	return 0;
+}
+
+static ssize_t reg_store(struct device *dev, struct device_attribute *attr,
+			 const char *buf, size_t count)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct uio_info *info = platform_get_drvdata(pdev);
+	struct fsl_elbc_gpcm *priv = info->priv;
+	struct fsl_lbc_bank *bank = &priv->lbc->bank[priv->bank];
+	unsigned long val;
+	u32 reg_br_cur;
+	u32 reg_or_cur;
+	u32 reg_new;
+
+	/* parse use input */
+	if (kstrtoul(buf, 0, &val) != 0)
+		return -EINVAL;
+	reg_new = (u32)val;
+
+	/* read current values */
+	reg_br_cur = in_be32(&bank->br);
+	reg_or_cur = in_be32(&bank->or);
+
+	if (attr == &dev_attr_reg_br) {
+		/* not allowed to change effective base address */
+		if ((reg_br_cur & reg_or_cur & BR_BA) !=
+		    (reg_new & reg_or_cur & BR_BA)) {
+			return -EINVAL;
+		}
+
+		/* not allowed to change mode */
+		if ((reg_new & BR_MSEL) != BR_MS_GPCM)
+			return -EINVAL;
+
+		/* write new value (force valid) */
+		out_be32(&bank->br, reg_new | BR_V);
+
+	} else if (attr == &dev_attr_reg_or) {
+		/* not allowed to change access mask */
+		if ((reg_or_cur & OR_GPCM_AM) != (reg_new & OR_GPCM_AM))
+			return -EINVAL;
+
+		/* write new value */
+		out_be32(&bank->or, reg_new);
+
+	} else {
+		return -EINVAL;
+	}
+
+	return count;
+}
+
+#ifdef CONFIG_UIO_FSL_ELBC_GPCM_NETX5152
+#define DPM_HOST_WIN0_OFFSET	0xff00
+#define DPM_HOST_INT_STAT0	0xe0
+#define DPM_HOST_INT_EN0	0xf0
+#define DPM_HOST_INT_MASK	0xe600ffff
+#define DPM_HOST_INT_GLOBAL_EN	0x80000000
+
+static irqreturn_t netx5152_irq_handler(int irq, struct uio_info *info)
+{
+	void __iomem *reg_int_en = info->mem[0].internal_addr +
+					DPM_HOST_WIN0_OFFSET +
+					DPM_HOST_INT_EN0;
+	void __iomem *reg_int_stat = info->mem[0].internal_addr +
+					DPM_HOST_WIN0_OFFSET +
+					DPM_HOST_INT_STAT0;
+
+	/* check if an interrupt is enabled and active */
+	if ((ioread32(reg_int_en) & ioread32(reg_int_stat) &
+	     DPM_HOST_INT_MASK) == 0) {
+		return IRQ_NONE;
+	}
+
+	/* disable interrupts */
+	iowrite32(ioread32(reg_int_en) & ~DPM_HOST_INT_GLOBAL_EN, reg_int_en);
+
+	return IRQ_HANDLED;
+}
+
+static void netx5152_init(struct uio_info *info)
+{
+	unsigned long win0_offset = DPM_HOST_WIN0_OFFSET;
+	struct fsl_elbc_gpcm *priv = info->priv;
+	const void *prop;
+
+	/* get an optional initial win0 offset */
+	prop = of_get_property(priv->dev->of_node,
+			       "netx5152,init-win0-offset", NULL);
+	if (prop)
+		win0_offset = of_read_ulong(prop, 1);
+
+	/* disable interrupts */
+	iowrite32(0, info->mem[0].internal_addr + win0_offset +
+		     DPM_HOST_INT_EN0);
+}
+
+static void netx5152_shutdown(struct uio_info *info, bool init_err)
+{
+	if (init_err)
+		return;
+
+	/* disable interrupts */
+	iowrite32(0, info->mem[0].internal_addr + DPM_HOST_WIN0_OFFSET +
+		     DPM_HOST_INT_EN0);
+}
+#endif
+
+static void setup_periph(struct fsl_elbc_gpcm *priv,
+				   const char *type)
+{
+#ifdef CONFIG_UIO_FSL_ELBC_GPCM_NETX5152
+	if (strcmp(type, "netx5152") == 0) {
+		priv->irq_handler = netx5152_irq_handler;
+		priv->init = netx5152_init;
+		priv->shutdown = netx5152_shutdown;
+		priv->name = "netX 51/52";
+		return;
+	}
+#endif
+}
+
+static int check_of_data(struct fsl_elbc_gpcm *priv,
+				   struct resource *res,
+				   u32 reg_br, u32 reg_or)
+{
+	/* check specified bank */
+	if (priv->bank >= MAX_BANKS) {
+		dev_err(priv->dev, "invalid bank\n");
+		return -ENODEV;
+	}
+
+	/* check specified mode (BR_MS_GPCM is 0) */
+	if ((reg_br & BR_MSEL) != BR_MS_GPCM) {
+		dev_err(priv->dev, "unsupported mode\n");
+		return -ENODEV;
+	}
+
+	/* check specified mask vs. resource size */
+	if ((~(reg_or & OR_GPCM_AM) + 1) != resource_size(res)) {
+		dev_err(priv->dev, "address mask / size mismatch\n");
+		return -ENODEV;
+	}
+
+	/* check specified address */
+	if ((reg_br & reg_or & BR_BA) != fsl_lbc_addr(res->start)) {
+		dev_err(priv->dev, "base address mismatch\n");
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
+static int get_of_data(struct fsl_elbc_gpcm *priv, struct device_node *node,
+		       struct resource *res, u32 *reg_br,
+		       u32 *reg_or, unsigned int *irq, char **name)
+{
+	const char *dt_name;
+	const char *type;
+	int ret;
+
+	/* get the memory resource */
+	ret = of_address_to_resource(node, 0, res);
+	if (ret) {
+		dev_err(priv->dev, "failed to get resource\n");
+		return ret;
+	}
+
+	/* get the bank number */
+	ret = of_property_read_u32(node, "reg", &priv->bank);
+	if (ret) {
+		dev_err(priv->dev, "failed to get bank number\n");
+		return ret;
+	}
+
+	/* get BR value to set */
+	ret = of_property_read_u32(node, "elbc-gpcm-br", reg_br);
+	if (ret) {
+		dev_err(priv->dev, "missing elbc-gpcm-br value\n");
+		return ret;
+	}
+
+	/* get OR value to set */
+	ret = of_property_read_u32(node, "elbc-gpcm-or", reg_or);
+	if (ret) {
+		dev_err(priv->dev, "missing elbc-gpcm-or value\n");
+		return ret;
+	}
+
+	/* get optional peripheral type */
+	priv->name = "generic";
+	if (of_property_read_string(node, "device_type", &type) == 0)
+		setup_periph(priv, type);
+
+	/* get optional irq value */
+	*irq = irq_of_parse_and_map(node, 0);
+
+	/* sanity check device tree data */
+	ret = check_of_data(priv, res, *reg_br, *reg_or);
+	if (ret)
+		return ret;
+
+	/* get optional uio name */
+	if (of_property_read_string(node, "uio_name", &dt_name) != 0)
+		dt_name = "eLBC_GPCM";
+	*name = kstrdup(dt_name, GFP_KERNEL);
+	if (!*name)
+		return -ENOMEM;
+
+	return 0;
+}
+
+static int uio_fsl_elbc_gpcm_probe(struct platform_device *pdev)
+{
+	struct device_node *node = pdev->dev.of_node;
+	struct fsl_elbc_gpcm *priv;
+	struct uio_info *info;
+	char *uio_name = NULL;
+	struct resource res;
+	unsigned int irq;
+	u32 reg_br_cur;
+	u32 reg_or_cur;
+	u32 reg_br_new;
+	u32 reg_or_new;
+	int ret;
+
+	if (!fsl_lbc_ctrl_dev || !fsl_lbc_ctrl_dev->regs)
+		return -ENODEV;
+
+	/* allocate private data */
+	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+	priv->dev = &pdev->dev;
+	priv->lbc = fsl_lbc_ctrl_dev->regs;
+
+	/* get device tree data */
+	ret = get_of_data(priv, node, &res, &reg_br_new, &reg_or_new,
+			  &irq, &uio_name);
+	if (ret)
+		goto out_err0;
+
+	/* allocate UIO structure */
+	info = kzalloc(sizeof(*info), GFP_KERNEL);
+	if (!info) {
+		ret = -ENOMEM;
+		goto out_err0;
+	}
+
+	/* get current BR/OR values */
+	reg_br_cur = in_be32(&priv->lbc->bank[priv->bank].br);
+	reg_or_cur = in_be32(&priv->lbc->bank[priv->bank].or);
+
+	/* if bank already configured, make sure it matches */
+	if ((reg_br_cur & BR_V)) {
+		if ((reg_br_cur & BR_MSEL) != BR_MS_GPCM ||
+		    (reg_br_cur & reg_or_cur & BR_BA)
+		     != fsl_lbc_addr(res.start)) {
+			dev_err(priv->dev,
+				"bank in use by another peripheral\n");
+			ret = -ENODEV;
+			goto out_err1;
+		}
+
+		/* warn if behavior settings changing */
+		if ((reg_br_cur & ~(BR_BA | BR_V)) !=
+		    (reg_br_new & ~(BR_BA | BR_V))) {
+			dev_warn(priv->dev,
+				 "modifying BR settings: 0x%08x -> 0x%08x",
+				 reg_br_cur, reg_br_new);
+		}
+		if ((reg_or_cur & ~OR_GPCM_AM) != (reg_or_new & ~OR_GPCM_AM)) {
+			dev_warn(priv->dev,
+				 "modifying OR settings: 0x%08x -> 0x%08x",
+				 reg_or_cur, reg_or_new);
+		}
+	}
+
+	/* configure the bank (force base address and GPCM) */
+	reg_br_new &= ~(BR_BA | BR_MSEL);
+	reg_br_new |= fsl_lbc_addr(res.start) | BR_MS_GPCM | BR_V;
+	out_be32(&priv->lbc->bank[priv->bank].or, reg_or_new);
+	out_be32(&priv->lbc->bank[priv->bank].br, reg_br_new);
+
+	/* map the memory resource */
+	info->mem[0].internal_addr = ioremap(res.start, resource_size(&res));
+	if (!info->mem[0].internal_addr) {
+		dev_err(priv->dev, "failed to map chip region\n");
+		ret = -ENODEV;
+		goto out_err1;
+	}
+
+	/* set all UIO data */
+	if (node->name)
+		info->mem[0].name = kstrdup(node->name, GFP_KERNEL);
+	info->mem[0].addr = res.start;
+	info->mem[0].size = resource_size(&res);
+	info->mem[0].memtype = UIO_MEM_PHYS;
+	info->priv = priv;
+	info->name = uio_name;
+	info->version = "0.0.1";
+	if (irq != NO_IRQ) {
+		if (priv->irq_handler) {
+			info->irq = irq;
+			info->irq_flags = IRQF_SHARED;
+			info->handler = priv->irq_handler;
+		} else {
+			irq = NO_IRQ;
+			dev_warn(priv->dev, "ignoring irq, no handler\n");
+		}
+	}
+
+	if (priv->init)
+		priv->init(info);
+
+	/* register UIO device */
+	if (uio_register_device(priv->dev, info) != 0) {
+		dev_err(priv->dev, "UIO registration failed\n");
+		ret = -ENODEV;
+		goto out_err2;
+	}
+
+	/* store private data */
+	platform_set_drvdata(pdev, info);
+
+	/* create sysfs files */
+	ret = device_create_file(priv->dev, &dev_attr_reg_br);
+	if (ret)
+		goto out_err3;
+	ret = device_create_file(priv->dev, &dev_attr_reg_or);
+	if (ret)
+		goto out_err4;
+
+	dev_info(priv->dev,
+		 "eLBC/GPCM device (%s) at 0x%llx, bank %d, irq=%d\n",
+		 priv->name, (unsigned long long)res.start, priv->bank,
+		 irq != NO_IRQ ? irq : -1);
+
+	return 0;
+out_err4:
+	device_remove_file(priv->dev, &dev_attr_reg_br);
+out_err3:
+	platform_set_drvdata(pdev, NULL);
+	uio_unregister_device(info);
+out_err2:
+	if (priv->shutdown)
+		priv->shutdown(info, true);
+	iounmap(info->mem[0].internal_addr);
+out_err1:
+	kfree(info->mem[0].name);
+	kfree(info);
+out_err0:
+	kfree(uio_name);
+	kfree(priv);
+	return ret;
+}
+
+static int uio_fsl_elbc_gpcm_remove(struct platform_device *pdev)
+{
+	struct uio_info *info = platform_get_drvdata(pdev);
+	struct fsl_elbc_gpcm *priv = info->priv;
+
+	device_remove_file(priv->dev, &dev_attr_reg_or);
+	device_remove_file(priv->dev, &dev_attr_reg_br);
+	platform_set_drvdata(pdev, NULL);
+	uio_unregister_device(info);
+	if (priv->shutdown)
+		priv->shutdown(info, false);
+	iounmap(info->mem[0].internal_addr);
+	kfree(info->mem[0].name);
+	kfree(info->name);
+	kfree(info);
+	kfree(priv);
+
+	return 0;
+
+}
+
+static const struct of_device_id uio_fsl_elbc_gpcm_match[] = {
+	{ .compatible = "fsl,elbc-gpcm-uio", },
+	{}
+};
+
+static struct platform_driver uio_fsl_elbc_gpcm_driver = {
+	.driver = {
+		.name = "fsl,elbc-gpcm-uio",
+		.owner = THIS_MODULE,
+		.of_match_table = uio_fsl_elbc_gpcm_match,
+	},
+	.probe = uio_fsl_elbc_gpcm_probe,
+	.remove = uio_fsl_elbc_gpcm_remove,
+};
+
+static int __init uio_fsl_elbc_gpcm_init(void)
+{
+	return platform_driver_register(&uio_fsl_elbc_gpcm_driver);
+}
+
+static void __exit uio_fsl_elbc_gpcm_exit(void)
+{
+	platform_driver_unregister(&uio_fsl_elbc_gpcm_driver);
+}
+
+module_init(uio_fsl_elbc_gpcm_init);
+module_exit(uio_fsl_elbc_gpcm_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("John Ogness <john.ogness@linutronix.de>");
+MODULE_DESCRIPTION("Freescale Enhanced Local Bus Controller GPCM driver");
diff --git a/drivers/uio/uio_pci_generic.c b/drivers/uio/uio_pci_generic.c
index 077ae12269ce..d0b508b68f3c 100644
--- a/drivers/uio/uio_pci_generic.c
+++ b/drivers/uio/uio_pci_generic.c
@@ -91,7 +91,8 @@ static int probe(struct pci_dev *pdev,
 	gdev->info.handler = irqhandler;
 	gdev->pdev = pdev;
 
-	if (uio_register_device(&pdev->dev, &gdev->info))
+	err = uio_register_device(&pdev->dev, &gdev->info);
+	if (err)
 		goto err_register;
 	pci_set_drvdata(pdev, gdev);