| Daniel Schwierzeck | 06cfc03 | 2015-04-27 07:42:04 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2012-2014 Daniel Schwierzeck, daniel.schwierzeck@gmail.com |
| 3 | * |
| 4 | * SPDX-License-Identifier: GPL-2.0+ |
| 5 | */ |
| 6 | |
| 7 | #include <common.h> |
| 8 | #include <malloc.h> |
| 9 | #include <asm/errno.h> |
| 10 | #include <linux/mtd/mtd.h> |
| 11 | #include <spi_flash.h> |
| 12 | |
| 13 | static struct mtd_info sf_mtd_info; |
| 14 | static char sf_mtd_name[8]; |
| 15 | |
| 16 | static int spi_flash_mtd_erase(struct mtd_info *mtd, struct erase_info *instr) |
| 17 | { |
| 18 | struct spi_flash *flash = mtd->priv; |
| 19 | int err; |
| 20 | |
| 21 | instr->state = MTD_ERASING; |
| 22 | |
| 23 | err = spi_flash_erase(flash, instr->addr, instr->len); |
| 24 | if (err) { |
| 25 | instr->state = MTD_ERASE_FAILED; |
| 26 | instr->fail_addr = MTD_FAIL_ADDR_UNKNOWN; |
| 27 | return -EIO; |
| 28 | } |
| 29 | |
| 30 | instr->state = MTD_ERASE_DONE; |
| 31 | mtd_erase_callback(instr); |
| 32 | |
| 33 | return 0; |
| 34 | } |
| 35 | |
| 36 | static int spi_flash_mtd_read(struct mtd_info *mtd, loff_t from, size_t len, |
| 37 | size_t *retlen, u_char *buf) |
| 38 | { |
| 39 | struct spi_flash *flash = mtd->priv; |
| 40 | int err; |
| 41 | |
| 42 | err = spi_flash_read(flash, from, len, buf); |
| 43 | if (!err) |
| 44 | *retlen = len; |
| 45 | |
| 46 | return err; |
| 47 | } |
| 48 | |
| 49 | static int spi_flash_mtd_write(struct mtd_info *mtd, loff_t to, size_t len, |
| 50 | size_t *retlen, const u_char *buf) |
| 51 | { |
| 52 | struct spi_flash *flash = mtd->priv; |
| 53 | int err; |
| 54 | |
| 55 | err = spi_flash_write(flash, to, len, buf); |
| 56 | if (!err) |
| 57 | *retlen = len; |
| 58 | |
| 59 | return err; |
| 60 | } |
| 61 | |
| 62 | static void spi_flash_mtd_sync(struct mtd_info *mtd) |
| 63 | { |
| 64 | } |
| 65 | |
| 66 | static int spi_flash_mtd_number(void) |
| 67 | { |
| 68 | #ifdef CONFIG_SYS_MAX_FLASH_BANKS |
| 69 | return CONFIG_SYS_MAX_FLASH_BANKS; |
| 70 | #else |
| 71 | return 0; |
| 72 | #endif |
| 73 | } |
| 74 | |
| 75 | int spi_flash_mtd_register(struct spi_flash *flash) |
| 76 | { |
| 77 | memset(&sf_mtd_info, 0, sizeof(sf_mtd_info)); |
| 78 | sprintf(sf_mtd_name, "nor%d", spi_flash_mtd_number()); |
| 79 | |
| 80 | sf_mtd_info.name = sf_mtd_name; |
| 81 | sf_mtd_info.type = MTD_NORFLASH; |
| 82 | sf_mtd_info.flags = MTD_CAP_NORFLASH; |
| 83 | sf_mtd_info.writesize = 1; |
| 84 | sf_mtd_info.writebufsize = flash->page_size; |
| 85 | |
| 86 | sf_mtd_info._erase = spi_flash_mtd_erase; |
| 87 | sf_mtd_info._read = spi_flash_mtd_read; |
| 88 | sf_mtd_info._write = spi_flash_mtd_write; |
| 89 | sf_mtd_info._sync = spi_flash_mtd_sync; |
| 90 | |
| 91 | sf_mtd_info.size = flash->size; |
| 92 | sf_mtd_info.priv = flash; |
| 93 | |
| 94 | /* Only uniform flash devices for now */ |
| 95 | sf_mtd_info.numeraseregions = 0; |
| 96 | sf_mtd_info.erasesize = flash->sector_size; |
| 97 | |
| 98 | return add_mtd_device(&sf_mtd_info); |
| 99 | } |
| 100 | |
| 101 | void spi_flash_mtd_unregister(void) |
| 102 | { |
| 103 | del_mtd_device(&sf_mtd_info); |
| 104 | } |