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git01.mediatek.com / filogic / uboot / 70b66e749f59c0067b0ab44e05a5003c8b0faa16 / . / drivers / mtd / spi / sf_mtd.c
blob: 935ae4d2b989676b5d2fc4bc11e99e54fd4e852b [file] [log] [blame]
Daniel Schwierzeck06cfc032015-04-27 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>
Masahiro Yamada56a931c2016-09-21 11:28:55 +0900[diff] [blame]9#include <linux/errno.h>
Daniel Schwierzeck06cfc032015-04-27 07:42:04 +0200[diff] [blame]10#include <linux/mtd/mtd.h>
11#include <spi_flash.h>
12
13static struct mtd_info sf_mtd_info;
14static char sf_mtd_name[8];
15
16static 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
36static 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
49static 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
62static void spi_flash_mtd_sync(struct mtd_info *mtd)
63{
64}
65
66static 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
75int 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
101void spi_flash_mtd_unregister(void)
102{
103 del_mtd_device(&sf_mtd_info);
104}