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9fe6d8716e
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>
105 lines
2.2 KiB
C
105 lines
2.2 KiB
C
/*
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* Copyright (C) 2012-2014 Daniel Schwierzeck, daniel.schwierzeck@gmail.com
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <malloc.h>
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#include <asm/errno.h>
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#include <linux/mtd/mtd.h>
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#include <spi_flash.h>
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static struct mtd_info sf_mtd_info;
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static char sf_mtd_name[8];
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static int spi_flash_mtd_erase(struct mtd_info *mtd, struct erase_info *instr)
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{
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struct spi_flash *flash = mtd->priv;
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int err;
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instr->state = MTD_ERASING;
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err = spi_flash_erase(flash, instr->addr, instr->len);
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if (err) {
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instr->state = MTD_ERASE_FAILED;
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instr->fail_addr = MTD_FAIL_ADDR_UNKNOWN;
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return -EIO;
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}
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instr->state = MTD_ERASE_DONE;
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mtd_erase_callback(instr);
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return 0;
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}
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static int spi_flash_mtd_read(struct mtd_info *mtd, loff_t from, size_t len,
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size_t *retlen, u_char *buf)
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{
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struct spi_flash *flash = mtd->priv;
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int err;
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err = spi_flash_read(flash, from, len, buf);
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if (!err)
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*retlen = len;
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return err;
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}
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static int spi_flash_mtd_write(struct mtd_info *mtd, loff_t to, size_t len,
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size_t *retlen, const u_char *buf)
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{
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struct spi_flash *flash = mtd->priv;
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int err;
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err = spi_flash_write(flash, to, len, buf);
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if (!err)
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*retlen = len;
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return err;
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}
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static void spi_flash_mtd_sync(struct mtd_info *mtd)
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{
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}
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static int spi_flash_mtd_number(void)
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{
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#ifdef CONFIG_SYS_MAX_FLASH_BANKS
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return CONFIG_SYS_MAX_FLASH_BANKS;
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#else
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return 0;
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#endif
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}
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int spi_flash_mtd_register(struct spi_flash *flash)
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{
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memset(&sf_mtd_info, 0, sizeof(sf_mtd_info));
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sprintf(sf_mtd_name, "nor%d", spi_flash_mtd_number());
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sf_mtd_info.name = sf_mtd_name;
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sf_mtd_info.type = MTD_NORFLASH;
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sf_mtd_info.flags = MTD_CAP_NORFLASH;
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sf_mtd_info.writesize = 1;
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sf_mtd_info.writebufsize = flash->page_size;
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sf_mtd_info._erase = spi_flash_mtd_erase;
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sf_mtd_info._read = spi_flash_mtd_read;
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sf_mtd_info._write = spi_flash_mtd_write;
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sf_mtd_info._sync = spi_flash_mtd_sync;
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sf_mtd_info.size = flash->size;
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sf_mtd_info.priv = flash;
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/* Only uniform flash devices for now */
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sf_mtd_info.numeraseregions = 0;
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sf_mtd_info.erasesize = flash->sector_size;
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return add_mtd_device(&sf_mtd_info);
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}
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void spi_flash_mtd_unregister(void)
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{
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del_mtd_device(&sf_mtd_info);
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}
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