1 files changed, 0 insertions, 281 deletions
diff --git a/drivers/mtd/maps/gpio-addr-flash.c b/drivers/mtd/maps/gpio-addr-flash.c
deleted file mode 100644
index a20e85aa770e..000000000000
--- a/drivers/mtd/maps/gpio-addr-flash.c
+++ /dev/null
@@ -1,281 +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/gpio/consumer.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 win_mask(x) ((BIT(x)) - 1)
-
-#define DRIVER_NAME "gpio-addr-flash"
-
-/**
- * struct async_state - keep GPIO flash state
- *	@mtd:         MTD state for this mapping
- *	@map:         MTD map state for this flash
- *	@gpios:       Struct containing the array of GPIO descriptors
- *	@gpio_values: cached GPIO values
- *	@win_order:   dedicated memory size (if no GPIOs)
- */
-struct async_state {
-	struct mtd_info *mtd;
-	struct map_info map;
-	struct gpio_descs *gpios;
-	unsigned int gpio_values;
-	unsigned int win_order;
-};
-#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).
- */
-static void gf_set_gpios(struct async_state *state, unsigned long ofs)
-{
-	int i;
-
-	ofs >>= state->win_order;
-
-	if (ofs == state->gpio_values)
-		return;
-
-	for (i = 0; i < state->gpios->ndescs; i++) {
-		if ((ofs & BIT(i)) == (state->gpio_values & BIT(i)))
-			continue;
-
-		gpiod_set_value(state->gpios->desc[i], !!(ofs & BIT(i)));
-	}
-
-	state->gpio_values = ofs;
-}
-
-/**
- * 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 & win_mask(state->win_order)));
-	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) {
-		this_len = from & win_mask(state->win_order);
-		this_len = BIT(state->win_order) - this_len;
-		this_len = min_t(int, len, this_len);
-
-		gf_set_gpios(state, from);
-		memcpy_fromio(to,
-			      map->virt + (from & win_mask(state->win_order)),
-			      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 & win_mask(state->win_order)));
-}
-
-/**
- * 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) {
-		this_len = to & win_mask(state->win_order);
-		this_len = BIT(state->win_order) - this_len;
-		this_len = min_t(int, len, this_len);
-
-		gf_set_gpios(state, to);
-		memcpy_toio(map->virt + (to & win_mask(state->win_order)),
-			    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 = { ... };
- * static struct gpiod_lookup_table addr_flash_gpios = {
- *		.dev_id = "gpio-addr-flash.0",
- *		.table = {
- *		GPIO_LOOKUP_IDX("gpio.0", 15, "addr", 0, GPIO_ACTIVE_HIGH),
- *		GPIO_LOOKUP_IDX("gpio.0", 16, "addr", 1, GPIO_ACTIVE_HIGH),
- *		);
- * };
- * gpiod_add_lookup_table(&addr_flash_gpios);
- *
- * struct resource flash_resource[] = {
- *	{
- *		.name  = "cfi_probe",
- *		.start = 0x20000000,
- *		.end   = 0x201fffff,
- *		.flags = IORESOURCE_MEM,
- *	},
- * };
- * 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)
-{
-	struct physmap_flash_data *pdata;
-	struct resource *memory;
-	struct async_state *state;
-
-	pdata = dev_get_platdata(&pdev->dev);
-	memory = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-
-	if (!memory)
-		return -EINVAL;
-
-	state = devm_kzalloc(&pdev->dev, sizeof(*state), GFP_KERNEL);
-	if (!state)
-		return -ENOMEM;
-
-	state->gpios = devm_gpiod_get_array(&pdev->dev, "addr", GPIOD_OUT_LOW);
-	if (IS_ERR(state->gpios))
-		return PTR_ERR(state->gpios);
-
-	state->win_order      = get_bitmask_order(resource_size(memory)) - 1;
-
-	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       = BIT(state->win_order + state->gpios->ndescs);
-	state->map.virt	      = devm_ioremap_resource(&pdev->dev, memory);
-	if (IS_ERR(state->map.virt))
-		return PTR_ERR(state->map.virt);
-
-	state->map.phys       = NO_XIP;
-	state->map.map_priv_1 = (unsigned long)state;
-
-	platform_set_drvdata(pdev, state);
-
-	dev_notice(&pdev->dev, "probing %d-bit flash bus\n",
-		   state->map.bankwidth * 8);
-	state->mtd = do_map_probe(memory->name, &state->map);
-	if (!state->mtd)
-		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);
-
-	mtd_device_unregister(state->mtd);
-	map_destroy(state->mtd);
-	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");