u-boot/drivers/mtd/spi/sf_mtd.c

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// SPDX-License-Identifier: GPL-2.0+
mtd, spi: Add MTD layer driver Add MTD layer driver for spi, original patch from: http://git.denx.de/?p=u-boot/u-boot-mips.git;a=commitdiff;h=bb246819cdc90493dd7089eaa51b9e639765cced Changes from Heiko Schocher against this patch: - Remove compile error if not defining CONFIG_SPI_FLASH_MTD: LD drivers/mtd/spi/built-in.o drivers/mtd/spi/sf_probe.o: In function `spi_flash_mtd_unregister': /home/hs/abb/imx6/u-boot/drivers/mtd/spi/sf_internal.h:168: multiple definition of `spi_flash_mtd_unregister' drivers/mtd/spi/sf_params.o:/home/hs/abb/imx6/u-boot/drivers/mtd/spi/sf_internal.h:168: first defined here drivers/mtd/spi/sf_ops.o: In function `spi_flash_mtd_unregister': /home/hs/abb/imx6/u-boot/drivers/mtd/spi/sf_internal.h:168: multiple definition of `spi_flash_mtd_unregister' drivers/mtd/spi/sf_params.o:/home/hs/abb/imx6/u-boot/drivers/mtd/spi/sf_internal.h:168: first defined here make[1]: *** [drivers/mtd/spi/built-in.o] Fehler 1 make: *** [drivers/mtd/spi] Fehler 2 - Add a README entry. - Add correct writebufsize, to fit with Linux v3.14 MTD, UBI/UBIFS sync. Note (From Jagan): For testing raw mtd parition erase/read/write operations using cmd_sf, sf_mtd should be required to register the spi flash device to MTD layer but the sf_mtd_info ops were not required until and unless if we use any flash filesystem layer say for example UBI. Due to this the foot-print got increased ~290bytes in non-UBI case here that should be acceptible. Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com> Signed-off-by: Heiko Schocher <hs@denx.de> Tested-by: Jagannadh Teki <jteki@openedev.com> Reviewed-by: Jagannadh Teki <jteki@openedev.com>
2015-04-27 05:42:04 +00:00
/*
* Copyright (C) 2012-2014 Daniel Schwierzeck, daniel.schwierzeck@gmail.com
*/
#include <common.h>
#include <malloc.h>
#include <linux/errno.h>
mtd, spi: Add MTD layer driver Add MTD layer driver for spi, original patch from: http://git.denx.de/?p=u-boot/u-boot-mips.git;a=commitdiff;h=bb246819cdc90493dd7089eaa51b9e639765cced Changes from Heiko Schocher against this patch: - Remove compile error if not defining CONFIG_SPI_FLASH_MTD: LD drivers/mtd/spi/built-in.o drivers/mtd/spi/sf_probe.o: In function `spi_flash_mtd_unregister': /home/hs/abb/imx6/u-boot/drivers/mtd/spi/sf_internal.h:168: multiple definition of `spi_flash_mtd_unregister' drivers/mtd/spi/sf_params.o:/home/hs/abb/imx6/u-boot/drivers/mtd/spi/sf_internal.h:168: first defined here drivers/mtd/spi/sf_ops.o: In function `spi_flash_mtd_unregister': /home/hs/abb/imx6/u-boot/drivers/mtd/spi/sf_internal.h:168: multiple definition of `spi_flash_mtd_unregister' drivers/mtd/spi/sf_params.o:/home/hs/abb/imx6/u-boot/drivers/mtd/spi/sf_internal.h:168: first defined here make[1]: *** [drivers/mtd/spi/built-in.o] Fehler 1 make: *** [drivers/mtd/spi] Fehler 2 - Add a README entry. - Add correct writebufsize, to fit with Linux v3.14 MTD, UBI/UBIFS sync. Note (From Jagan): For testing raw mtd parition erase/read/write operations using cmd_sf, sf_mtd should be required to register the spi flash device to MTD layer but the sf_mtd_info ops were not required until and unless if we use any flash filesystem layer say for example UBI. Due to this the foot-print got increased ~290bytes in non-UBI case here that should be acceptible. Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com> Signed-off-by: Heiko Schocher <hs@denx.de> Tested-by: Jagannadh Teki <jteki@openedev.com> Reviewed-by: Jagannadh Teki <jteki@openedev.com>
2015-04-27 05:42:04 +00:00
#include <linux/mtd/mtd.h>
#include <spi_flash.h>
static struct mtd_info sf_mtd_info;
static char sf_mtd_name[8];
static int spi_flash_mtd_erase(struct mtd_info *mtd, struct erase_info *instr)
{
struct spi_flash *flash = mtd->priv;
int err;
instr->state = MTD_ERASING;
err = spi_flash_erase(flash, instr->addr, instr->len);
if (err) {
instr->state = MTD_ERASE_FAILED;
instr->fail_addr = MTD_FAIL_ADDR_UNKNOWN;
return -EIO;
}
instr->state = MTD_ERASE_DONE;
mtd_erase_callback(instr);
return 0;
}
static int spi_flash_mtd_read(struct mtd_info *mtd, loff_t from, size_t len,
size_t *retlen, u_char *buf)
{
struct spi_flash *flash = mtd->priv;
int err;
err = spi_flash_read(flash, from, len, buf);
if (!err)
*retlen = len;
return err;
}
static int spi_flash_mtd_write(struct mtd_info *mtd, loff_t to, size_t len,
size_t *retlen, const u_char *buf)
{
struct spi_flash *flash = mtd->priv;
int err;
err = spi_flash_write(flash, to, len, buf);
if (!err)
*retlen = len;
return err;
}
static void spi_flash_mtd_sync(struct mtd_info *mtd)
{
}
static int spi_flash_mtd_number(void)
{
#ifdef CONFIG_SYS_MAX_FLASH_BANKS
return CONFIG_SYS_MAX_FLASH_BANKS;
#else
return 0;
#endif
}
int spi_flash_mtd_register(struct spi_flash *flash)
{
memset(&sf_mtd_info, 0, sizeof(sf_mtd_info));
sprintf(sf_mtd_name, "nor%d", spi_flash_mtd_number());
sf_mtd_info.name = sf_mtd_name;
sf_mtd_info.type = MTD_NORFLASH;
sf_mtd_info.flags = MTD_CAP_NORFLASH;
sf_mtd_info.writesize = 1;
sf_mtd_info.writebufsize = flash->page_size;
sf_mtd_info._erase = spi_flash_mtd_erase;
sf_mtd_info._read = spi_flash_mtd_read;
sf_mtd_info._write = spi_flash_mtd_write;
sf_mtd_info._sync = spi_flash_mtd_sync;
sf_mtd_info.size = flash->size;
sf_mtd_info.priv = flash;
/* Only uniform flash devices for now */
sf_mtd_info.numeraseregions = 0;
sf_mtd_info.erasesize = flash->sector_size;
return add_mtd_device(&sf_mtd_info);
}
void spi_flash_mtd_unregister(void)
{
del_mtd_device(&sf_mtd_info);
}