1 files changed, 0 insertions, 302 deletions
diff --git a/drivers/mtd/maps/gpio-addr-flash.c b/drivers/mtd/maps/gpio-addr-flash.c
deleted file mode 100644
index 385305e66fd1..000000000000
--- a/drivers/mtd/maps/gpio-addr-flash.c
+++ /dev/null
@@ -1,302 +0,0 @@
-/*
- * drivers/mtd/maps/gpio-addr-flash.c
- *
- * Handle the case where a flash device is mostly addressed using physical
- * line and supplemented by GPIOs.  This way you can hook up say a 8MiB flash
- * to a 2MiB memory range and use the GPIOs to select a particular range.
- *
- * Copyright © 2000 Nicolas Pitre <nico@cam.org>
- * Copyright © 2005-2009 Analog Devices Inc.
- *
- * Enter bugs at http://blackfin.uclinux.org/
- *
- * Licensed under the GPL-2 or later.
- */
-
-#include <linux/gpio.h>
-#include <linux/io.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/map.h>
-#include <linux/mtd/partitions.h>
-#include <linux/mtd/physmap.h>
-#include <linux/platform_device.h>
-#include <linux/slab.h>
-#include <linux/types.h>
-
-#define pr_devinit(fmt, args...) \
-	({ static const char __fmt[] = fmt; printk(__fmt, ## args); })
-
-#define DRIVER_NAME "gpio-addr-flash"
-#define PFX DRIVER_NAME ": "
-
-/**
- * struct async_state - keep GPIO flash state
- *	@mtd:         MTD state for this mapping
- *	@map:         MTD map state for this flash
- *	@gpio_count:  number of GPIOs used to address
- *	@gpio_addrs:  array of GPIOs to twiddle
- *	@gpio_values: cached GPIO values
- *	@win_size:    dedicated memory size (if no GPIOs)
- */
-struct async_state {
-	struct mtd_info *mtd;
-	struct map_info map;
-	size_t gpio_count;
-	unsigned *gpio_addrs;
-	int *gpio_values;
-	unsigned long win_size;
-};
-#define gf_map_info_to_state(mi) ((struct async_state *)(mi)->map_priv_1)
-
-/**
- * gf_set_gpios() - set GPIO address lines to access specified flash offset
- *	@state: GPIO flash state
- *	@ofs:   desired offset to access
- *
- * Rather than call the GPIO framework every time, cache the last-programmed
- * value.  This speeds up sequential accesses (which are by far the most common
- * type).  We rely on the GPIO framework to treat non-zero value as high so
- * that we don't have to normalize the bits.
- */
-static void gf_set_gpios(struct async_state *state, unsigned long ofs)
-{
-	size_t i = 0;
-	int value;
-	ofs /= state->win_size;
-	do {
-		value = ofs & (1 << i);
-		if (state->gpio_values[i] != value) {
-			gpio_set_value(state->gpio_addrs[i], value);
-			state->gpio_values[i] = value;
-		}
-	} while (++i < state->gpio_count);
-}
-
-/**
- * gf_read() - read a word at the specified offset
- *	@map: MTD map state
- *	@ofs: desired offset to read
- */
-static map_word gf_read(struct map_info *map, unsigned long ofs)
-{
-	struct async_state *state = gf_map_info_to_state(map);
-	uint16_t word;
-	map_word test;
-
-	gf_set_gpios(state, ofs);
-
-	word = readw(map->virt + (ofs % state->win_size));
-	test.x[0] = word;
-	return test;
-}
-
-/**
- * gf_copy_from() - copy a chunk of data from the flash
- *	@map:  MTD map state
- *	@to:   memory to copy to
- *	@from: flash offset to copy from
- *	@len:  how much to copy
- *
- * The "from" region may straddle more than one window, so toggle the GPIOs for
- * each window region before reading its data.
- */
-static void gf_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
-{
-	struct async_state *state = gf_map_info_to_state(map);
-
-	int this_len;
-
-	while (len) {
-		if ((from % state->win_size) + len > state->win_size)
-			this_len = state->win_size - (from % state->win_size);
-		else
-			this_len = len;
-
-		gf_set_gpios(state, from);
-		memcpy_fromio(to, map->virt + (from % state->win_size),
-			 this_len);
-		len -= this_len;
-		from += this_len;
-		to += this_len;
-	}
-}
-
-/**
- * gf_write() - write a word at the specified offset
- *	@map: MTD map state
- *	@ofs: desired offset to write
- */
-static void gf_write(struct map_info *map, map_word d1, unsigned long ofs)
-{
-	struct async_state *state = gf_map_info_to_state(map);
-	uint16_t d;
-
-	gf_set_gpios(state, ofs);
-
-	d = d1.x[0];
-	writew(d, map->virt + (ofs % state->win_size));
-}
-
-/**
- * gf_copy_to() - copy a chunk of data to the flash
- *	@map:  MTD map state
- *	@to:   flash offset to copy to
- *	@from: memory to copy from
- *	@len:  how much to copy
- *
- * See gf_copy_from() caveat.
- */
-static void gf_copy_to(struct map_info *map, unsigned long to,
-		       const void *from, ssize_t len)
-{
-	struct async_state *state = gf_map_info_to_state(map);
-
-	int this_len;
-
-	while (len) {
-		if ((to % state->win_size) + len > state->win_size)
-			this_len = state->win_size - (to % state->win_size);
-		else
-			this_len = len;
-
-		gf_set_gpios(state, to);
-		memcpy_toio(map->virt + (to % state->win_size), from, len);
-
-		len -= this_len;
-		to += this_len;
-		from += this_len;
-	}
-}
-
-static const char * const part_probe_types[] = {
-	"cmdlinepart", "RedBoot", NULL };
-
-/**
- * gpio_flash_probe() - setup a mapping for a GPIO assisted flash
- *	@pdev: platform device
- *
- * The platform resource layout expected looks something like:
- * struct mtd_partition partitions[] = { ... };
- * struct physmap_flash_data flash_data = { ... };
- * unsigned flash_gpios[] = { GPIO_XX, GPIO_XX, ... };
- * struct resource flash_resource[] = {
- *	{
- *		.name  = "cfi_probe",
- *		.start = 0x20000000,
- *		.end   = 0x201fffff,
- *		.flags = IORESOURCE_MEM,
- *	}, {
- *		.start = (unsigned long)flash_gpios,
- *		.end   = ARRAY_SIZE(flash_gpios),
- *		.flags = IORESOURCE_IRQ,
- *	}
- * };
- * struct platform_device flash_device = {
- *	.name          = "gpio-addr-flash",
- *	.dev           = { .platform_data = &flash_data, },
- *	.num_resources = ARRAY_SIZE(flash_resource),
- *	.resource      = flash_resource,
- *	...
- * };
- */
-static int gpio_flash_probe(struct platform_device *pdev)
-{
-	size_t i, arr_size;
-	struct physmap_flash_data *pdata;
-	struct resource *memory;
-	struct resource *gpios;
-	struct async_state *state;
-
-	pdata = dev_get_platdata(&pdev->dev);
-	memory = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	gpios = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
-
-	if (!memory || !gpios || !gpios->end)
-		return -EINVAL;
-
-	arr_size = sizeof(int) * gpios->end;
-	state = kzalloc(sizeof(*state) + arr_size, GFP_KERNEL);
-	if (!state)
-		return -ENOMEM;
-
-	/*
-	 * We cast start/end to known types in the boards file, so cast
-	 * away their pointer types here to the known types (gpios->xxx).
-	 */
-	state->gpio_count     = gpios->end;
-	state->gpio_addrs     = (void *)(unsigned long)gpios->start;
-	state->gpio_values    = (void *)(state + 1);
-	state->win_size       = resource_size(memory);
-	memset(state->gpio_values, 0xff, arr_size);
-
-	state->map.name       = DRIVER_NAME;
-	state->map.read       = gf_read;
-	state->map.copy_from  = gf_copy_from;
-	state->map.write      = gf_write;
-	state->map.copy_to    = gf_copy_to;
-	state->map.bankwidth  = pdata->width;
-	state->map.size       = state->win_size * (1 << state->gpio_count);
-	state->map.virt       = ioremap_nocache(memory->start, state->map.size);
-	state->map.phys       = NO_XIP;
-	state->map.map_priv_1 = (unsigned long)state;
-
-	platform_set_drvdata(pdev, state);
-
-	i = 0;
-	do {
-		if (gpio_request(state->gpio_addrs[i], DRIVER_NAME)) {
-			pr_devinit(KERN_ERR PFX "failed to request gpio %d\n",
-				state->gpio_addrs[i]);
-			while (i--)
-				gpio_free(state->gpio_addrs[i]);
-			kfree(state);
-			return -EBUSY;
-		}
-		gpio_direction_output(state->gpio_addrs[i], 0);
-	} while (++i < state->gpio_count);
-
-	pr_devinit(KERN_NOTICE PFX "probing %d-bit flash bus\n",
-		state->map.bankwidth * 8);
-	state->mtd = do_map_probe(memory->name, &state->map);
-	if (!state->mtd) {
-		for (i = 0; i < state->gpio_count; ++i)
-			gpio_free(state->gpio_addrs[i]);
-		kfree(state);
-		return -ENXIO;
-	}
-	state->mtd->dev.parent = &pdev->dev;
-
-	mtd_device_parse_register(state->mtd, part_probe_types, NULL,
-				  pdata->parts, pdata->nr_parts);
-
-	return 0;
-}
-
-static int gpio_flash_remove(struct platform_device *pdev)
-{
-	struct async_state *state = platform_get_drvdata(pdev);
-	size_t i = 0;
-	do {
-		gpio_free(state->gpio_addrs[i]);
-	} while (++i < state->gpio_count);
-	mtd_device_unregister(state->mtd);
-	map_destroy(state->mtd);
-	kfree(state);
-	return 0;
-}
-
-static struct platform_driver gpio_flash_driver = {
-	.probe		= gpio_flash_probe,
-	.remove		= gpio_flash_remove,
-	.driver		= {
-		.name	= DRIVER_NAME,
-	},
-};
-
-module_platform_driver(gpio_flash_driver);
-
-MODULE_AUTHOR("Mike Frysinger <vapier@gentoo.org>");
-MODULE_DESCRIPTION("MTD map driver for flashes addressed physically and with gpios");
-MODULE_LICENSE("GPL");