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/*
* Copyright 2008, Network Appliance Inc.
* Author: Jason McMullan <mcmullan <at> netapp.com>
* Licensed under the GPL-2 or later.
*/
#include <common.h>
#include <malloc.h>
#include <spi_flash.h>
#include "spi_flash_internal.h"
/* M25Pxx-specific commands */
#define CMD_W25_WREN 0x06 /* Write Enable */
#define CMD_W25_WRDI 0x04 /* Write Disable */
#define CMD_W25_RDSR 0x05 /* Read Status Register */
#define CMD_W25_WRSR 0x01 /* Write Status Register */
#define CMD_W25_READ 0x03 /* Read Data Bytes */
#define CMD_W25_FAST_READ 0x0b /* Read Data Bytes at Higher Speed */
#define CMD_W25_PP 0x02 /* Page Program */
#define CMD_W25_SE 0x20 /* Sector (4K) Erase */
#define CMD_W25_BE 0xd8 /* Block (64K) Erase */
#define CMD_W25_CE 0xc7 /* Chip Erase */
#define CMD_W25_DP 0xb9 /* Deep Power-down */
#define CMD_W25_RES 0xab /* Release from DP, and Read Signature */
struct winbond_spi_flash_params {
uint16_t id;
/* Log2 of page size in power-of-two mode */
uint8_t l2_page_size;
uint16_t pages_per_sector;
uint16_t sectors_per_block;
uint16_t nr_blocks;
const char *name;
};
/* spi_flash needs to be first so upper layers can free() it */
struct winbond_spi_flash {
struct spi_flash flash;
const struct winbond_spi_flash_params *params;
};
static inline struct winbond_spi_flash *
to_winbond_spi_flash(struct spi_flash *flash)
{
return container_of(flash, struct winbond_spi_flash, flash);
}
static const struct winbond_spi_flash_params winbond_spi_flash_table[] = {
{
.id = 0x3015,
.l2_page_size = 8,
.pages_per_sector = 16,
.sectors_per_block = 16,
.nr_blocks = 32,
.name = "W25X16",
},
{
.id = 0x3016,
.l2_page_size = 8,
.pages_per_sector = 16,
.sectors_per_block = 16,
.nr_blocks = 64,
.name = "W25X32",
},
{
.id = 0x3017,
.l2_page_size = 8,
.pages_per_sector = 16,
.sectors_per_block = 16,
.nr_blocks = 128,
.name = "W25X64",
},
{
.id = 0x4015,
.l2_page_size = 8,
.pages_per_sector = 16,
.sectors_per_block = 16,
.nr_blocks = 32,
.name = "W25Q16",
},
{
.id = 0x4016,
.l2_page_size = 8,
.pages_per_sector = 16,
.sectors_per_block = 16,
.nr_blocks = 64,
.name = "W25Q32",
},
{
.id = 0x4017,
.l2_page_size = 8,
.pages_per_sector = 16,
.sectors_per_block = 16,
.nr_blocks = 128,
.name = "W25Q64",
},
{
.id = 0x4018,
.l2_page_size = 8,
.pages_per_sector = 16,
.sectors_per_block = 16,
.nr_blocks = 256,
.name = "W25Q128",
},
};
static int winbond_erase(struct spi_flash *flash, u32 offset, size_t len)
{
return spi_flash_cmd_erase(flash, CMD_W25_SE, offset, len);
}
struct spi_flash *spi_flash_probe_winbond(struct spi_slave *spi, u8 *idcode)
{
const struct winbond_spi_flash_params *params;
unsigned page_size;
struct winbond_spi_flash *stm;
unsigned int i;
for (i = 0; i < ARRAY_SIZE(winbond_spi_flash_table); i++) {
params = &winbond_spi_flash_table[i];
if (params->id == ((idcode[1] << 8) | idcode[2]))
break;
}
if (i == ARRAY_SIZE(winbond_spi_flash_table)) {
debug("SF: Unsupported Winbond ID %02x%02x\n",
idcode[1], idcode[2]);
return NULL;
}
stm = malloc(sizeof(struct winbond_spi_flash));
if (!stm) {
debug("SF: Failed to allocate memory\n");
return NULL;
}
stm->params = params;
stm->flash.spi = spi;
stm->flash.name = params->name;
/* Assuming power-of-two page size initially. */
page_size = 1 << params->l2_page_size;
stm->flash.write = spi_flash_cmd_write_multi;
stm->flash.erase = winbond_erase;
stm->flash.read = spi_flash_cmd_read_fast;
stm->flash.page_size = page_size;
stm->flash.sector_size = page_size * stm->params->pages_per_sector;
stm->flash.size = page_size * params->pages_per_sector
* params->sectors_per_block
* params->nr_blocks;
return &stm->flash;
}
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