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/*
* (C) Copyright 2010, ucRobotics Inc.
* Author: Chong Huang <chuang@ucrobotics.com>
* Licensed under the GPL-2 or later.
*/
#include <common.h>
#include <malloc.h>
#include <spi_flash.h>
#include "spi_flash_internal.h"
/* EN25Q128-specific commands */
#define CMD_EN25Q128_WREN 0x06 /* Write Enable */
#define CMD_EN25Q128_WRDI 0x04 /* Write Disable */
#define CMD_EN25Q128_RDSR 0x05 /* Read Status Register */
#define CMD_EN25Q128_WRSR 0x01 /* Write Status Register */
#define CMD_EN25Q128_READ 0x03 /* Read Data Bytes */
#define CMD_EN25Q128_FAST_READ 0x0b /* Read Data Bytes at Higher Speed */
#define CMD_EN25Q128_PP 0x02 /* Page Program */
#define CMD_EN25Q128_SE 0x20 /* Sector Erase */
#define CMD_EN25Q128_BE 0xd8 /* Block Erase */
#define CMD_EN25Q128_DP 0xb9 /* Deep Power-down */
#define CMD_EN25Q128_RES 0xab /* Release from DP, and Read Signature */
struct eon_spi_flash_params {
u8 idcode1;
u16 page_size;
u16 pages_per_sector;
u16 sectors_per_block;
u16 nr_sectors;
const char *name;
};
static const struct eon_spi_flash_params eon_spi_flash_table[] = {
{
.idcode1 = 0x18,
.page_size = 256,
.pages_per_sector = 16,
.sectors_per_block = 16,
.nr_sectors = 4096,
.name = "EN25Q128",
},
};
static int eon_erase(struct spi_flash *flash, u32 offset, size_t len)
{
return spi_flash_cmd_erase(flash, CMD_EN25Q128_BE, offset, len);
}
struct spi_flash *spi_flash_probe_eon(struct spi_slave *spi, u8 *idcode)
{
const struct eon_spi_flash_params *params;
struct spi_flash *flash;
unsigned int i;
for (i = 0; i < ARRAY_SIZE(eon_spi_flash_table); ++i) {
params = &eon_spi_flash_table[i];
if (params->idcode1 == idcode[2])
break;
}
if (i == ARRAY_SIZE(eon_spi_flash_table)) {
debug("SF: Unsupported EON ID %02x\n", idcode[1]);
return NULL;
}
flash = malloc(sizeof(*flash));
if (!flash) {
debug("SF: Failed to allocate memory\n");
return NULL;
}
flash->spi = spi;
flash->name = params->name;
flash->write = spi_flash_cmd_write_multi;
flash->erase = eon_erase;
flash->read = spi_flash_cmd_read_fast;
flash->page_size = params->page_size;
flash->sector_size = params->page_size * params->pages_per_sector
* params->sectors_per_block;
flash->size = params->page_size * params->pages_per_sector
* params->nr_sectors;
return flash;
}
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