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Commit 5741a164 authored by Arnd Bergmann's avatar Arnd Bergmann Committed by Boris Brezillon
Browse files

mtd: maps: remove bfin-async-flash driver 



The blackfin architecture is getting removed, so this driver
has become obsolete.

Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
Signed-off-by: default avatarBoris Brezillon <boris.brezillon@bootlin.com>
parent 148a1a5d

drivers/mtd/maps/Kconfig

+0 −10
Original line number Diff line number Diff line
@@ -334,16 +334,6 @@ config MTD_PCMCIA_ANONYMOUS 


	  If unsure, say N.



config MTD_BFIN_ASYNC

	tristate "Blackfin BF533-STAMP Flash Chip Support"

	depends on BFIN533_STAMP && MTD_CFI && MTD_COMPLEX_MAPPINGS

	default y

	help

	  Map driver which allows for simultaneous utilization of

	  ethernet and CFI parallel flash.



	  If compiled as a module, it will be called bfin-async-flash.



config MTD_GPIO_ADDR

	tristate "GPIO-assisted Flash Chip Support"

	depends on GPIOLIB || COMPILE_TEST

drivers/mtd/maps/Makefile

+0 −1
Original line number Diff line number Diff line
@@ -42,7 +42,6 @@ obj-$(CONFIG_MTD_SCB2_FLASH) += scb2_flash.o 
obj-$(CONFIG_MTD_IXP4XX)	+= ixp4xx.o

obj-$(CONFIG_MTD_PLATRAM)	+= plat-ram.o

obj-$(CONFIG_MTD_INTEL_VR_NOR)	+= intel_vr_nor.o

obj-$(CONFIG_MTD_BFIN_ASYNC)	+= bfin-async-flash.o

obj-$(CONFIG_MTD_RBTX4939)	+= rbtx4939-flash.o

obj-$(CONFIG_MTD_VMU)		+= vmu-flash.o

obj-$(CONFIG_MTD_GPIO_ADDR)	+= gpio-addr-flash.o

drivers/mtd/maps/bfin-async-flash.c

deleted100644 → 0
+0 −196
Original line number Diff line number Diff line 
/*

 * drivers/mtd/maps/bfin-async-flash.c

 *

 * Handle the case where flash memory and ethernet mac/phy are

 * mapped onto the same async bank.  The BF533-STAMP does this

 * for example.  All board-specific configuration goes in your

 * board resources file.

 *

 * Copyright 2000 Nicolas Pitre <nico@fluxnic.net>

 * Copyright 2005-2008 Analog Devices Inc.

 *

 * Enter bugs at http://blackfin.uclinux.org/

 *

 * Licensed under the GPL-2 or later.

 */



#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>



#include <asm/blackfin.h>

#include <linux/gpio.h>

#include <linux/io.h>

#include <asm/unaligned.h>



#define pr_devinit(fmt, args...) \

		({ static const char __fmt[] = fmt; printk(__fmt, ## args); })



#define DRIVER_NAME "bfin-async-flash"



struct async_state {

	struct mtd_info *mtd;

	struct map_info map;

	int enet_flash_pin;

	uint32_t flash_ambctl0, flash_ambctl1;

	uint32_t save_ambctl0, save_ambctl1;

	unsigned long irq_flags;

};



static void switch_to_flash(struct async_state *state)

{

	local_irq_save(state->irq_flags);



	gpio_set_value(state->enet_flash_pin, 0);



	state->save_ambctl0 = bfin_read_EBIU_AMBCTL0();

	state->save_ambctl1 = bfin_read_EBIU_AMBCTL1();

	bfin_write_EBIU_AMBCTL0(state->flash_ambctl0);

	bfin_write_EBIU_AMBCTL1(state->flash_ambctl1);

	SSYNC();

}



static void switch_back(struct async_state *state)

{

	bfin_write_EBIU_AMBCTL0(state->save_ambctl0);

	bfin_write_EBIU_AMBCTL1(state->save_ambctl1);

	SSYNC();



	gpio_set_value(state->enet_flash_pin, 1);



	local_irq_restore(state->irq_flags);

}



static map_word bfin_flash_read(struct map_info *map, unsigned long ofs)

{

	struct async_state *state = (struct async_state *)map->map_priv_1;

	uint16_t word;

	map_word test;



	switch_to_flash(state);



	word = readw(map->virt + ofs);



	switch_back(state);



	test.x[0] = word;

	return test;

}



static void bfin_flash_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)

{

	struct async_state *state = (struct async_state *)map->map_priv_1;



	switch_to_flash(state);



	memcpy(to, map->virt + from, len);



	switch_back(state);

}



static void bfin_flash_write(struct map_info *map, map_word d1, unsigned long ofs)

{

	struct async_state *state = (struct async_state *)map->map_priv_1;

	uint16_t d;



	d = d1.x[0];



	switch_to_flash(state);



	writew(d, map->virt + ofs);

	SSYNC();



	switch_back(state);

}



static void bfin_flash_copy_to(struct map_info *map, unsigned long to, const void *from, ssize_t len)

{

	struct async_state *state = (struct async_state *)map->map_priv_1;



	switch_to_flash(state);



	memcpy(map->virt + to, from, len);

	SSYNC();



	switch_back(state);

}



static const char * const part_probe_types[] = {

	"cmdlinepart", "RedBoot", NULL };



static int bfin_flash_probe(struct platform_device *pdev)

{

	struct physmap_flash_data *pdata = dev_get_platdata(&pdev->dev);

	struct resource *memory = platform_get_resource(pdev, IORESOURCE_MEM, 0);

	struct resource *flash_ambctl = platform_get_resource(pdev, IORESOURCE_MEM, 1);

	struct async_state *state;



	state = kzalloc(sizeof(*state), GFP_KERNEL);

	if (!state)

		return -ENOMEM;



	state->map.name       = DRIVER_NAME;

	state->map.read       = bfin_flash_read;

	state->map.copy_from  = bfin_flash_copy_from;

	state->map.write      = bfin_flash_write;

	state->map.copy_to    = bfin_flash_copy_to;

	state->map.bankwidth  = pdata->width;

	state->map.size       = resource_size(memory);

	state->map.virt       = (void __iomem *)memory->start;

	state->map.phys       = memory->start;

	state->map.map_priv_1 = (unsigned long)state;

	state->enet_flash_pin = platform_get_irq(pdev, 0);

	state->flash_ambctl0  = flash_ambctl->start;

	state->flash_ambctl1  = flash_ambctl->end;



	if (gpio_request(state->enet_flash_pin, DRIVER_NAME)) {

		pr_devinit(KERN_ERR DRIVER_NAME ": Failed to request gpio %d\n", state->enet_flash_pin);

		kfree(state);

		return -EBUSY;

	}

	gpio_direction_output(state->enet_flash_pin, 1);



	pr_devinit(KERN_NOTICE DRIVER_NAME ": probing %d-bit flash bus\n", state->map.bankwidth * 8);

	state->mtd = do_map_probe(memory->name, &state->map);

	if (!state->mtd) {

		gpio_free(state->enet_flash_pin);

		kfree(state);

		return -ENXIO;

	}



	mtd_device_parse_register(state->mtd, part_probe_types, NULL,

				  pdata->parts, pdata->nr_parts);



	platform_set_drvdata(pdev, state);



	return 0;

}



static int bfin_flash_remove(struct platform_device *pdev)

{

	struct async_state *state = platform_get_drvdata(pdev);

	gpio_free(state->enet_flash_pin);

	mtd_device_unregister(state->mtd);

	map_destroy(state->mtd);

	kfree(state);

	return 0;

}



static struct platform_driver bfin_flash_driver = {

	.probe		= bfin_flash_probe,

	.remove		= bfin_flash_remove,

	.driver		= {

		.name	= DRIVER_NAME,

	},

};



module_platform_driver(bfin_flash_driver);



MODULE_LICENSE("GPL");

MODULE_DESCRIPTION("MTD map driver for Blackfins with flash/ethernet on same async bank");