Re: [PATCH 1/2] mtd: maps: remove bfin-async-flash driver

[Boris Brezillon]

On Wed, 14 Mar 2018 17:30:22 +0100
Arnd Bergmann <arnd@xxxxxxxx> wrote:

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

Applied to mtd/next.

Thanks,

Boris

> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
> ---
>  drivers/mtd/maps/Kconfig            |  10 --
>  drivers/mtd/maps/Makefile           |   1 -
>  drivers/mtd/maps/bfin-async-flash.c | 196 ------------------------------------
>  3 files changed, 207 deletions(-)
>  delete mode 100644 drivers/mtd/maps/bfin-async-flash.c
> ---
> Sending these two patches separately, as the NAND driver patch
> has a nasty conflict with the directory move. Please pick
> up both into the mtd tree.
> diff --git a/drivers/mtd/maps/Kconfig b/drivers/mtd/maps/Kconfig
> index 542fdf8e81fa..bdc1283f30fb 100644
> --- a/drivers/mtd/maps/Kconfig
> +++ b/drivers/mtd/maps/Kconfig
> @@ -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
> diff --git a/drivers/mtd/maps/Makefile b/drivers/mtd/maps/Makefile
> index b849aaf85c34..51acf1fec19b 100644
> --- a/drivers/mtd/maps/Makefile
> +++ b/drivers/mtd/maps/Makefile
> @@ -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
> diff --git a/drivers/mtd/maps/bfin-async-flash.c b/drivers/mtd/maps/bfin-async-flash.c
> deleted file mode 100644
> index 41730feeace8..000000000000
> --- a/drivers/mtd/maps/bfin-async-flash.c
> +++ /dev/null
> @@ -1,196 +0,0 @@
> -/*
> - * 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@xxxxxxxxxxx>
> - * 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");



-- 
Boris Brezillon, Bootlin (formerly Free Electrons)
Embedded Linux and Kernel engineering
https://bootlin.com