1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) 2012-2014 Daniel Schwierzeck, daniel.schwierzeck@gmail.com
8 #include <linux/errno.h>
9 #include <linux/mtd/mtd.h>
10 #include <spi_flash.h>
12 static struct mtd_info sf_mtd_info;
13 static char sf_mtd_name[8];
15 static int spi_flash_mtd_erase(struct mtd_info *mtd, struct erase_info *instr)
17 struct spi_flash *flash = mtd->priv;
20 instr->state = MTD_ERASING;
22 err = spi_flash_erase(flash, instr->addr, instr->len);
24 instr->state = MTD_ERASE_FAILED;
25 instr->fail_addr = MTD_FAIL_ADDR_UNKNOWN;
29 instr->state = MTD_ERASE_DONE;
30 mtd_erase_callback(instr);
35 static int spi_flash_mtd_read(struct mtd_info *mtd, loff_t from, size_t len,
36 size_t *retlen, u_char *buf)
38 struct spi_flash *flash = mtd->priv;
41 err = spi_flash_read(flash, from, len, buf);
48 static int spi_flash_mtd_write(struct mtd_info *mtd, loff_t to, size_t len,
49 size_t *retlen, const u_char *buf)
51 struct spi_flash *flash = mtd->priv;
54 err = spi_flash_write(flash, to, len, buf);
61 static void spi_flash_mtd_sync(struct mtd_info *mtd)
65 static int spi_flash_mtd_number(void)
67 #ifdef CONFIG_SYS_MAX_FLASH_BANKS
68 return CONFIG_SYS_MAX_FLASH_BANKS;
74 int spi_flash_mtd_register(struct spi_flash *flash)
76 memset(&sf_mtd_info, 0, sizeof(sf_mtd_info));
77 sprintf(sf_mtd_name, "nor%d", spi_flash_mtd_number());
79 sf_mtd_info.name = sf_mtd_name;
80 sf_mtd_info.type = MTD_NORFLASH;
81 sf_mtd_info.flags = MTD_CAP_NORFLASH;
82 sf_mtd_info.writesize = 1;
83 sf_mtd_info.writebufsize = flash->page_size;
85 sf_mtd_info._erase = spi_flash_mtd_erase;
86 sf_mtd_info._read = spi_flash_mtd_read;
87 sf_mtd_info._write = spi_flash_mtd_write;
88 sf_mtd_info._sync = spi_flash_mtd_sync;
90 sf_mtd_info.size = flash->size;
91 sf_mtd_info.priv = flash;
93 /* Only uniform flash devices for now */
94 sf_mtd_info.numeraseregions = 0;
95 sf_mtd_info.erasesize = flash->sector_size;
97 return add_mtd_device(&sf_mtd_info);
100 void spi_flash_mtd_unregister(void)
102 del_mtd_device(&sf_mtd_info);