Linux-libre 4.7.1-gnupck-4.7.1-gnu

1 files changed, 0 insertions, 660 deletions

diff --git a/drivers/gpio/gpio-generic.c b/drivers/gpio/gpio-generic.c
deleted file mode 100644
index 54cddfa98..000000000
--- a/drivers/gpio/gpio-generic.c
+++ /dev/null
@@ -1,660 +0,0 @@
-/*
- * Generic driver for memory-mapped GPIO controllers.
- *
- * Copyright 2008 MontaVista Software, Inc.
- * Copyright 2008,2010 Anton Vorontsov <cbouatmailru@gmail.com>
- *
- * This program is free software; you can redistribute  it and/or modify it
- * under  the terms of  the GNU General  Public License as published by the
- * Free Software Foundation;  either version 2 of the  License, or (at your
- * option) any later version.
- *
- * ....``.```~~~~````.`.`.`.`.```````'',,,.........`````......`.......
- * ...``                                                         ```````..
- * ..The simplest form of a GPIO controller that the driver supports is``
- *  `.just a single "data" register, where GPIO state can be read and/or `
- *    `,..written. ,,..``~~~~ .....``.`.`.~~.```.`.........``````.```````
- *        `````````
-                                    ___
-_/~~|___/~|   . ```~~~~~~       ___/___\___     ,~.`.`.`.`````.~~...,,,,...
-__________|~$@~~~        %~    /o*o*o*o*o*o\   .. Implementing such a GPIO .
-o        `                     ~~~~\___/~~~~    ` controller in FPGA is ,.`
-                                                 `....trivial..'~`.```.```
- *                                                    ```````
- *  .```````~~~~`..`.``.``.
- * .  The driver supports  `...       ,..```.`~~~```````````````....````.``,,
- * .   big-endian notation, just`.  .. A bit more sophisticated controllers ,
- *  . register the device with -be`. .with a pair of set/clear-bit registers ,
- *   `.. suffix.  ```~~`````....`.`   . affecting the data register and the .`
- *     ``.`.``...```                  ```.. output pins are also supported.`
- *                        ^^             `````.`````````.,``~``~``~~``````
- *                                                   .                  ^^
- *   ,..`.`.`...````````````......`.`.`.`.`.`..`.`.`..
- * .. The expectation is that in at least some cases .    ,-~~~-,
- *  .this will be used with roll-your-own ASIC/FPGA .`     \   /
- *  .logic in Verilog or VHDL. ~~~`````````..`````~~`       \ /
- *  ..````````......```````````                             \o_
- *                                                           |
- *                              ^^                          / \
- *
- *           ...`````~~`.....``.`..........``````.`.``.```........``.
- *            `  8, 16, 32 and 64 bits registers are supported, and``.
- *            . the number of GPIOs is determined by the width of   ~
- *             .. the registers. ,............```.`.`..`.`.~~~.`.`.`~
- *               `.......````.```
- */
-
-#include <linux/init.h>
-#include <linux/err.h>
-#include <linux/bug.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/spinlock.h>
-#include <linux/compiler.h>
-#include <linux/types.h>
-#include <linux/errno.h>
-#include <linux/log2.h>
-#include <linux/ioport.h>
-#include <linux/io.h>
-#include <linux/gpio/driver.h>
-#include <linux/slab.h>
-#include <linux/bitops.h>
-#include <linux/platform_device.h>
-#include <linux/mod_devicetable.h>
-
-static void bgpio_write8(void __iomem *reg, unsigned long data)
-{
-	writeb(data, reg);
-}
-
-static unsigned long bgpio_read8(void __iomem *reg)
-{
-	return readb(reg);
-}
-
-static void bgpio_write16(void __iomem *reg, unsigned long data)
-{
-	writew(data, reg);
-}
-
-static unsigned long bgpio_read16(void __iomem *reg)
-{
-	return readw(reg);
-}
-
-static void bgpio_write32(void __iomem *reg, unsigned long data)
-{
-	writel(data, reg);
-}
-
-static unsigned long bgpio_read32(void __iomem *reg)
-{
-	return readl(reg);
-}
-
-#if BITS_PER_LONG >= 64
-static void bgpio_write64(void __iomem *reg, unsigned long data)
-{
-	writeq(data, reg);
-}
-
-static unsigned long bgpio_read64(void __iomem *reg)
-{
-	return readq(reg);
-}
-#endif /* BITS_PER_LONG >= 64 */
-
-static void bgpio_write16be(void __iomem *reg, unsigned long data)
-{
-	iowrite16be(data, reg);
-}
-
-static unsigned long bgpio_read16be(void __iomem *reg)
-{
-	return ioread16be(reg);
-}
-
-static void bgpio_write32be(void __iomem *reg, unsigned long data)
-{
-	iowrite32be(data, reg);
-}
-
-static unsigned long bgpio_read32be(void __iomem *reg)
-{
-	return ioread32be(reg);
-}
-
-static unsigned long bgpio_pin2mask(struct gpio_chip *gc, unsigned int pin)
-{
-	return BIT(pin);
-}
-
-static unsigned long bgpio_pin2mask_be(struct gpio_chip *gc,
-				       unsigned int pin)
-{
-	return BIT(gc->bgpio_bits - 1 - pin);
-}
-
-static int bgpio_get_set(struct gpio_chip *gc, unsigned int gpio)
-{
-	unsigned long pinmask = gc->pin2mask(gc, gpio);
-
-	if (gc->bgpio_dir & pinmask)
-		return !!(gc->read_reg(gc->reg_set) & pinmask);
-	else
-		return !!(gc->read_reg(gc->reg_dat) & pinmask);
-}
-
-static int bgpio_get(struct gpio_chip *gc, unsigned int gpio)
-{
-	return !!(gc->read_reg(gc->reg_dat) & gc->pin2mask(gc, gpio));
-}
-
-static void bgpio_set_none(struct gpio_chip *gc, unsigned int gpio, int val)
-{
-}
-
-static void bgpio_set(struct gpio_chip *gc, unsigned int gpio, int val)
-{
-	unsigned long mask = gc->pin2mask(gc, gpio);
-	unsigned long flags;
-
-	spin_lock_irqsave(&gc->bgpio_lock, flags);
-
-	if (val)
-		gc->bgpio_data |= mask;
-	else
-		gc->bgpio_data &= ~mask;
-
-	gc->write_reg(gc->reg_dat, gc->bgpio_data);
-
-	spin_unlock_irqrestore(&gc->bgpio_lock, flags);
-}
-
-static void bgpio_set_with_clear(struct gpio_chip *gc, unsigned int gpio,
-				 int val)
-{
-	unsigned long mask = gc->pin2mask(gc, gpio);
-
-	if (val)
-		gc->write_reg(gc->reg_set, mask);
-	else
-		gc->write_reg(gc->reg_clr, mask);
-}
-
-static void bgpio_set_set(struct gpio_chip *gc, unsigned int gpio, int val)
-{
-	unsigned long mask = gc->pin2mask(gc, gpio);
-	unsigned long flags;
-
-	spin_lock_irqsave(&gc->bgpio_lock, flags);
-
-	if (val)
-		gc->bgpio_data |= mask;
-	else
-		gc->bgpio_data &= ~mask;
-
-	gc->write_reg(gc->reg_set, gc->bgpio_data);
-
-	spin_unlock_irqrestore(&gc->bgpio_lock, flags);
-}
-
-static void bgpio_multiple_get_masks(struct gpio_chip *gc,
-				     unsigned long *mask, unsigned long *bits,
-				     unsigned long *set_mask,
-				     unsigned long *clear_mask)
-{
-	int i;
-
-	*set_mask = 0;
-	*clear_mask = 0;
-
-	for (i = 0; i < gc->bgpio_bits; i++) {
-		if (*mask == 0)
-			break;
-		if (__test_and_clear_bit(i, mask)) {
-			if (test_bit(i, bits))
-				*set_mask |= gc->pin2mask(gc, i);
-			else
-				*clear_mask |= gc->pin2mask(gc, i);
-		}
-	}
-}
-
-static void bgpio_set_multiple_single_reg(struct gpio_chip *gc,
-					  unsigned long *mask,
-					  unsigned long *bits,
-					  void __iomem *reg)
-{
-	unsigned long flags;
-	unsigned long set_mask, clear_mask;
-
-	spin_lock_irqsave(&gc->bgpio_lock, flags);
-
-	bgpio_multiple_get_masks(gc, mask, bits, &set_mask, &clear_mask);
-
-	gc->bgpio_data |= set_mask;
-	gc->bgpio_data &= ~clear_mask;
-
-	gc->write_reg(reg, gc->bgpio_data);
-
-	spin_unlock_irqrestore(&gc->bgpio_lock, flags);
-}
-
-static void bgpio_set_multiple(struct gpio_chip *gc, unsigned long *mask,
-			       unsigned long *bits)
-{
-	bgpio_set_multiple_single_reg(gc, mask, bits, gc->reg_dat);
-}
-
-static void bgpio_set_multiple_set(struct gpio_chip *gc, unsigned long *mask,
-				   unsigned long *bits)
-{
-	bgpio_set_multiple_single_reg(gc, mask, bits, gc->reg_set);
-}
-
-static void bgpio_set_multiple_with_clear(struct gpio_chip *gc,
-					  unsigned long *mask,
-					  unsigned long *bits)
-{
-	unsigned long set_mask, clear_mask;
-
-	bgpio_multiple_get_masks(gc, mask, bits, &set_mask, &clear_mask);
-
-	if (set_mask)
-		gc->write_reg(gc->reg_set, set_mask);
-	if (clear_mask)
-		gc->write_reg(gc->reg_clr, clear_mask);
-}
-
-static int bgpio_simple_dir_in(struct gpio_chip *gc, unsigned int gpio)
-{
-	return 0;
-}
-
-static int bgpio_dir_out_err(struct gpio_chip *gc, unsigned int gpio,
-				int val)
-{
-	return -EINVAL;
-}
-
-static int bgpio_simple_dir_out(struct gpio_chip *gc, unsigned int gpio,
-				int val)
-{
-	gc->set(gc, gpio, val);
-
-	return 0;
-}
-
-static int bgpio_dir_in(struct gpio_chip *gc, unsigned int gpio)
-{
-	unsigned long flags;
-
-	spin_lock_irqsave(&gc->bgpio_lock, flags);
-
-	gc->bgpio_dir &= ~gc->pin2mask(gc, gpio);
-	gc->write_reg(gc->reg_dir, gc->bgpio_dir);
-
-	spin_unlock_irqrestore(&gc->bgpio_lock, flags);
-
-	return 0;
-}
-
-static int bgpio_get_dir(struct gpio_chip *gc, unsigned int gpio)
-{
-	/* Return 0 if output, 1 of input */
-	return !(gc->read_reg(gc->reg_dir) & gc->pin2mask(gc, gpio));
-}
-
-static int bgpio_dir_out(struct gpio_chip *gc, unsigned int gpio, int val)
-{
-	unsigned long flags;
-
-	gc->set(gc, gpio, val);
-
-	spin_lock_irqsave(&gc->bgpio_lock, flags);
-
-	gc->bgpio_dir |= gc->pin2mask(gc, gpio);
-	gc->write_reg(gc->reg_dir, gc->bgpio_dir);
-
-	spin_unlock_irqrestore(&gc->bgpio_lock, flags);
-
-	return 0;
-}
-
-static int bgpio_dir_in_inv(struct gpio_chip *gc, unsigned int gpio)
-{
-	unsigned long flags;
-
-	spin_lock_irqsave(&gc->bgpio_lock, flags);
-
-	gc->bgpio_dir |= gc->pin2mask(gc, gpio);
-	gc->write_reg(gc->reg_dir, gc->bgpio_dir);
-
-	spin_unlock_irqrestore(&gc->bgpio_lock, flags);
-
-	return 0;
-}
-
-static int bgpio_dir_out_inv(struct gpio_chip *gc, unsigned int gpio, int val)
-{
-	unsigned long flags;
-
-	gc->set(gc, gpio, val);
-
-	spin_lock_irqsave(&gc->bgpio_lock, flags);
-
-	gc->bgpio_dir &= ~gc->pin2mask(gc, gpio);
-	gc->write_reg(gc->reg_dir, gc->bgpio_dir);
-
-	spin_unlock_irqrestore(&gc->bgpio_lock, flags);
-
-	return 0;
-}
-
-static int bgpio_get_dir_inv(struct gpio_chip *gc, unsigned int gpio)
-{
-	/* Return 0 if output, 1 if input */
-	return !!(gc->read_reg(gc->reg_dir) & gc->pin2mask(gc, gpio));
-}
-
-static int bgpio_setup_accessors(struct device *dev,
-				 struct gpio_chip *gc,
-				 bool bit_be,
-				 bool byte_be)
-{
-
-	switch (gc->bgpio_bits) {
-	case 8:
-		gc->read_reg	= bgpio_read8;
-		gc->write_reg	= bgpio_write8;
-		break;
-	case 16:
-		if (byte_be) {
-			gc->read_reg	= bgpio_read16be;
-			gc->write_reg	= bgpio_write16be;
-		} else {
-			gc->read_reg	= bgpio_read16;
-			gc->write_reg	= bgpio_write16;
-		}
-		break;
-	case 32:
-		if (byte_be) {
-			gc->read_reg	= bgpio_read32be;
-			gc->write_reg	= bgpio_write32be;
-		} else {
-			gc->read_reg	= bgpio_read32;
-			gc->write_reg	= bgpio_write32;
-		}
-		break;
-#if BITS_PER_LONG >= 64
-	case 64:
-		if (byte_be) {
-			dev_err(dev,
-				"64 bit big endian byte order unsupported\n");
-			return -EINVAL;
-		} else {
-			gc->read_reg	= bgpio_read64;
-			gc->write_reg	= bgpio_write64;
-		}
-		break;
-#endif /* BITS_PER_LONG >= 64 */
-	default:
-		dev_err(dev, "unsupported data width %u bits\n", gc->bgpio_bits);
-		return -EINVAL;
-	}
-
-	gc->pin2mask = bit_be ? bgpio_pin2mask_be : bgpio_pin2mask;
-
-	return 0;
-}
-
-/*
- * Create the device and allocate the resources.  For setting GPIO's there are
- * three supported configurations:
- *
- *	- single input/output register resource (named "dat").
- *	- set/clear pair (named "set" and "clr").
- *	- single output register resource and single input resource ("set" and
- *	dat").
- *
- * For the single output register, this drives a 1 by setting a bit and a zero
- * by clearing a bit.  For the set clr pair, this drives a 1 by setting a bit
- * in the set register and clears it by setting a bit in the clear register.
- * The configuration is detected by which resources are present.
- *
- * For setting the GPIO direction, there are three supported configurations:
- *
- *	- simple bidirection GPIO that requires no configuration.
- *	- an output direction register (named "dirout") where a 1 bit
- *	indicates the GPIO is an output.
- *	- an input direction register (named "dirin") where a 1 bit indicates
- *	the GPIO is an input.
- */
-static int bgpio_setup_io(struct gpio_chip *gc,
-			  void __iomem *dat,
-			  void __iomem *set,
-			  void __iomem *clr,
-			  unsigned long flags)
-{
-
-	gc->reg_dat = dat;
-	if (!gc->reg_dat)
-		return -EINVAL;
-
-	if (set && clr) {
-		gc->reg_set = set;
-		gc->reg_clr = clr;
-		gc->set = bgpio_set_with_clear;
-		gc->set_multiple = bgpio_set_multiple_with_clear;
-	} else if (set && !clr) {
-		gc->reg_set = set;
-		gc->set = bgpio_set_set;
-		gc->set_multiple = bgpio_set_multiple_set;
-	} else if (flags & BGPIOF_NO_OUTPUT) {
-		gc->set = bgpio_set_none;
-		gc->set_multiple = NULL;
-	} else {
-		gc->set = bgpio_set;
-		gc->set_multiple = bgpio_set_multiple;
-	}
-
-	if (!(flags & BGPIOF_UNREADABLE_REG_SET) &&
-	    (flags & BGPIOF_READ_OUTPUT_REG_SET))
-		gc->get = bgpio_get_set;
-	else
-		gc->get = bgpio_get;
-
-	return 0;
-}
-
-static int bgpio_setup_direction(struct gpio_chip *gc,
-				 void __iomem *dirout,
-				 void __iomem *dirin,
-				 unsigned long flags)
-{
-	if (dirout && dirin) {
-		return -EINVAL;
-	} else if (dirout) {
-		gc->reg_dir = dirout;
-		gc->direction_output = bgpio_dir_out;
-		gc->direction_input = bgpio_dir_in;
-		gc->get_direction = bgpio_get_dir;
-	} else if (dirin) {
-		gc->reg_dir = dirin;
-		gc->direction_output = bgpio_dir_out_inv;
-		gc->direction_input = bgpio_dir_in_inv;
-		gc->get_direction = bgpio_get_dir_inv;
-	} else {
-		if (flags & BGPIOF_NO_OUTPUT)
-			gc->direction_output = bgpio_dir_out_err;
-		else
-			gc->direction_output = bgpio_simple_dir_out;
-		gc->direction_input = bgpio_simple_dir_in;
-	}
-
-	return 0;
-}
-
-static int bgpio_request(struct gpio_chip *chip, unsigned gpio_pin)
-{
-	if (gpio_pin < chip->ngpio)
-		return 0;
-
-	return -EINVAL;
-}
-
-int bgpio_init(struct gpio_chip *gc, struct device *dev,
-	       unsigned long sz, void __iomem *dat, void __iomem *set,
-	       void __iomem *clr, void __iomem *dirout, void __iomem *dirin,
-	       unsigned long flags)
-{
-	int ret;
-
-	if (!is_power_of_2(sz))
-		return -EINVAL;
-
-	gc->bgpio_bits = sz * 8;
-	if (gc->bgpio_bits > BITS_PER_LONG)
-		return -EINVAL;
-
-	spin_lock_init(&gc->bgpio_lock);
-	gc->parent = dev;
-	gc->label = dev_name(dev);
-	gc->base = -1;
-	gc->ngpio = gc->bgpio_bits;
-	gc->request = bgpio_request;
-
-	ret = bgpio_setup_io(gc, dat, set, clr, flags);
-	if (ret)
-		return ret;
-
-	ret = bgpio_setup_accessors(dev, gc, flags & BGPIOF_BIG_ENDIAN,
-				    flags & BGPIOF_BIG_ENDIAN_BYTE_ORDER);
-	if (ret)
-		return ret;
-
-	ret = bgpio_setup_direction(gc, dirout, dirin, flags);
-	if (ret)
-		return ret;
-
-	gc->bgpio_data = gc->read_reg(gc->reg_dat);
-	if (gc->set == bgpio_set_set &&
-			!(flags & BGPIOF_UNREADABLE_REG_SET))
-		gc->bgpio_data = gc->read_reg(gc->reg_set);
-	if (gc->reg_dir && !(flags & BGPIOF_UNREADABLE_REG_DIR))
-		gc->bgpio_dir = gc->read_reg(gc->reg_dir);
-
-	return ret;
-}
-EXPORT_SYMBOL_GPL(bgpio_init);
-
-#ifdef CONFIG_GPIO_GENERIC_PLATFORM
-
-static void __iomem *bgpio_map(struct platform_device *pdev,
-			       const char *name,
-			       resource_size_t sane_sz)
-{
-	struct resource *r;
-	resource_size_t sz;
-
-	r = platform_get_resource_byname(pdev, IORESOURCE_MEM, name);
-	if (!r)
-		return NULL;
-
-	sz = resource_size(r);
-	if (sz != sane_sz)
-		return IOMEM_ERR_PTR(-EINVAL);
-
-	return devm_ioremap_resource(&pdev->dev, r);
-}
-
-static int bgpio_pdev_probe(struct platform_device *pdev)
-{
-	struct device *dev = &pdev->dev;
-	struct resource *r;
-	void __iomem *dat;
-	void __iomem *set;
-	void __iomem *clr;
-	void __iomem *dirout;
-	void __iomem *dirin;
-	unsigned long sz;
-	unsigned long flags = pdev->id_entry->driver_data;
-	int err;
-	struct gpio_chip *gc;
-	struct bgpio_pdata *pdata = dev_get_platdata(dev);
-
-	r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dat");
-	if (!r)
-		return -EINVAL;
-
-	sz = resource_size(r);
-
-	dat = bgpio_map(pdev, "dat", sz);
-	if (IS_ERR(dat))
-		return PTR_ERR(dat);
-
-	set = bgpio_map(pdev, "set", sz);
-	if (IS_ERR(set))
-		return PTR_ERR(set);
-
-	clr = bgpio_map(pdev, "clr", sz);
-	if (IS_ERR(clr))
-		return PTR_ERR(clr);
-
-	dirout = bgpio_map(pdev, "dirout", sz);
-	if (IS_ERR(dirout))
-		return PTR_ERR(dirout);
-
-	dirin = bgpio_map(pdev, "dirin", sz);
-	if (IS_ERR(dirin))
-		return PTR_ERR(dirin);
-
-	gc = devm_kzalloc(&pdev->dev, sizeof(*gc), GFP_KERNEL);
-	if (!gc)
-		return -ENOMEM;
-
-	err = bgpio_init(gc, dev, sz, dat, set, clr, dirout, dirin, flags);
-	if (err)
-		return err;
-
-	if (pdata) {
-		if (pdata->label)
-			gc->label = pdata->label;
-		gc->base = pdata->base;
-		if (pdata->ngpio > 0)
-			gc->ngpio = pdata->ngpio;
-	}
-
-	platform_set_drvdata(pdev, gc);
-
-	return devm_gpiochip_add_data(&pdev->dev, gc, NULL);
-}
-
-static const struct platform_device_id bgpio_id_table[] = {
-	{
-		.name		= "basic-mmio-gpio",
-		.driver_data	= 0,
-	}, {
-		.name		= "basic-mmio-gpio-be",
-		.driver_data	= BGPIOF_BIG_ENDIAN,
-	},
-	{ }
-};
-MODULE_DEVICE_TABLE(platform, bgpio_id_table);
-
-static struct platform_driver bgpio_driver = {
-	.driver = {
-		.name = "basic-mmio-gpio",
-	},
-	.id_table = bgpio_id_table,
-	.probe = bgpio_pdev_probe,
-};
-
-module_platform_driver(bgpio_driver);
-
-#endif /* CONFIG_GPIO_GENERIC_PLATFORM */
-
-MODULE_DESCRIPTION("Driver for basic memory-mapped GPIO controllers");
-MODULE_AUTHOR("Anton Vorontsov <cbouatmailru@gmail.com>");
-MODULE_LICENSE("GPL");