2 * Copyright 2008, Network Appliance Inc.
3 * Author: Jason McMullan <mcmullan <at> netapp.com>
4 * Licensed under the GPL-2 or later.
11 #include "spi_flash_internal.h"
13 /* M25Pxx-specific commands */
14 #define CMD_W25_WREN 0x06 /* Write Enable */
15 #define CMD_W25_WRDI 0x04 /* Write Disable */
16 #define CMD_W25_RDSR 0x05 /* Read Status Register */
17 #define CMD_W25_WRSR 0x01 /* Write Status Register */
18 #define CMD_W25_READ 0x03 /* Read Data Bytes */
19 #define CMD_W25_FAST_READ 0x0b /* Read Data Bytes at Higher Speed */
20 #define CMD_W25_PP 0x02 /* Page Program */
21 #define CMD_W25_SE 0x20 /* Sector (4K) Erase */
22 #define CMD_W25_BE 0xd8 /* Block (64K) Erase */
23 #define CMD_W25_CE 0xc7 /* Chip Erase */
24 #define CMD_W25_DP 0xb9 /* Deep Power-down */
25 #define CMD_W25_RES 0xab /* Release from DP, and Read Signature */
27 struct winbond_spi_flash_params {
29 /* Log2 of page size in power-of-two mode */
31 uint16_t pages_per_sector;
32 uint16_t sectors_per_block;
37 static const struct winbond_spi_flash_params winbond_spi_flash_table[] = {
41 .pages_per_sector = 16,
42 .sectors_per_block = 16,
49 .pages_per_sector = 16,
50 .sectors_per_block = 16,
57 .pages_per_sector = 16,
58 .sectors_per_block = 16,
65 .pages_per_sector = 16,
66 .sectors_per_block = 16,
73 .pages_per_sector = 16,
74 .sectors_per_block = 16,
81 .pages_per_sector = 16,
82 .sectors_per_block = 16,
89 .pages_per_sector = 16,
90 .sectors_per_block = 16,
96 static int winbond_erase(struct spi_flash *flash, u32 offset, size_t len)
98 return spi_flash_cmd_erase(flash, CMD_W25_SE, offset, len);
101 struct spi_flash *spi_flash_probe_winbond(struct spi_slave *spi, u8 *idcode)
103 const struct winbond_spi_flash_params *params;
104 struct spi_flash *flash;
108 for (i = 0; i < ARRAY_SIZE(winbond_spi_flash_table); i++) {
109 params = &winbond_spi_flash_table[i];
110 if (params->id == ((idcode[1] << 8) | idcode[2]))
114 if (i == ARRAY_SIZE(winbond_spi_flash_table)) {
115 debug("SF: Unsupported Winbond ID %02x%02x\n",
116 idcode[1], idcode[2]);
120 flash = malloc(sizeof(*flash));
122 debug("SF: Failed to allocate memory\n");
127 flash->name = params->name;
129 /* Assuming power-of-two page size initially. */
130 page_size = 1 << params->l2_page_size;
132 flash->write = spi_flash_cmd_write_multi;
133 flash->erase = winbond_erase;
134 flash->read = spi_flash_cmd_read_fast;
135 flash->page_size = page_size;
136 flash->sector_size = page_size * params->pages_per_sector;
137 flash->size = page_size * params->pages_per_sector
138 * params->sectors_per_block