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_SE 0x20 /* Sector (4K) Erase */
15 #define CMD_W25_BE 0xd8 /* Block (64K) Erase */
16 #define CMD_W25_CE 0xc7 /* Chip Erase */
18 struct winbond_spi_flash_params {
20 /* Log2 of page size in power-of-two mode */
22 uint16_t pages_per_sector;
23 uint16_t sectors_per_block;
28 static const struct winbond_spi_flash_params winbond_spi_flash_table[] = {
32 .pages_per_sector = 16,
33 .sectors_per_block = 16,
40 .pages_per_sector = 16,
41 .sectors_per_block = 16,
48 .pages_per_sector = 16,
49 .sectors_per_block = 16,
56 .pages_per_sector = 16,
57 .sectors_per_block = 16,
64 .pages_per_sector = 16,
65 .sectors_per_block = 16,
72 .pages_per_sector = 16,
73 .sectors_per_block = 16,
80 .pages_per_sector = 16,
81 .sectors_per_block = 16,
88 .pages_per_sector = 16,
89 .sectors_per_block = 16,
96 .pages_per_sector = 16,
97 .sectors_per_block = 16,
103 static int winbond_erase(struct spi_flash *flash, u32 offset, size_t len)
105 return spi_flash_cmd_erase(flash, CMD_W25_SE, offset, len);
108 struct spi_flash *spi_flash_probe_winbond(struct spi_slave *spi, u8 *idcode)
110 const struct winbond_spi_flash_params *params;
111 struct spi_flash *flash;
115 for (i = 0; i < ARRAY_SIZE(winbond_spi_flash_table); i++) {
116 params = &winbond_spi_flash_table[i];
117 if (params->id == ((idcode[1] << 8) | idcode[2]))
121 if (i == ARRAY_SIZE(winbond_spi_flash_table)) {
122 debug("SF: Unsupported Winbond ID %02x%02x\n",
123 idcode[1], idcode[2]);
127 flash = malloc(sizeof(*flash));
129 debug("SF: Failed to allocate memory\n");
134 flash->name = params->name;
136 /* Assuming power-of-two page size initially. */
137 page_size = 1 << params->l2_page_size;
139 flash->write = spi_flash_cmd_write_multi;
140 flash->erase = winbond_erase;
141 flash->read = spi_flash_cmd_read_fast;
142 flash->page_size = page_size;
143 flash->sector_size = page_size * params->pages_per_sector;
144 flash->size = page_size * params->pages_per_sector
145 * params->sectors_per_block