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/*
* (C) Copyright 2000-2002
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* Copyright 2008, Network Appliance Inc.
* Jason McMullan <mcmullan@netapp.com>
*
* Copyright (C) 2004-2007 Freescale Semiconductor, Inc.
* TsiChung Liew (Tsi-Chung.Liew@freescale.com)
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <malloc.h>
#include <spi_flash.h>
#include "spi_flash_internal.h"
/* M25Pxx-specific commands */
#define CMD_M25PXX_WREN 0x06 /* Write Enable */
#define CMD_M25PXX_WRDI 0x04 /* Write Disable */
#define CMD_M25PXX_RDSR 0x05 /* Read Status Register */
#define CMD_M25PXX_WRSR 0x01 /* Write Status Register */
#define CMD_M25PXX_READ 0x03 /* Read Data Bytes */
#define CMD_M25PXX_FAST_READ 0x0b /* Read Data Bytes at Higher Speed */
#define CMD_M25PXX_PP 0x02 /* Page Program */
#define CMD_M25PXX_SE 0xd8 /* Sector Erase */
#define CMD_M25PXX_BE 0xc7 /* Bulk Erase */
#define CMD_M25PXX_DP 0xb9 /* Deep Power-down */
#define CMD_M25PXX_RES 0xab /* Release from DP, and Read Signature */
struct stmicro_spi_flash_params {
u8 idcode1;
u16 page_size;
u16 pages_per_sector;
u16 nr_sectors;
const char *name;
};
static const struct stmicro_spi_flash_params stmicro_spi_flash_table[] = {
{
.idcode1 = 0x11,
.page_size = 256,
.pages_per_sector = 128,
.nr_sectors = 4,
.name = "M25P10",
},
{
.idcode1 = 0x15,
.page_size = 256,
.pages_per_sector = 256,
.nr_sectors = 32,
.name = "M25P16",
},
{
.idcode1 = 0x12,
.page_size = 256,
.pages_per_sector = 256,
.nr_sectors = 4,
.name = "M25P20",
},
{
.idcode1 = 0x16,
.page_size = 256,
.pages_per_sector = 256,
.nr_sectors = 64,
.name = "M25P32",
},
{
.idcode1 = 0x13,
.page_size = 256,
.pages_per_sector = 256,
.nr_sectors = 8,
.name = "M25P40",
},
{
.idcode1 = 0x17,
.page_size = 256,
.pages_per_sector = 256,
.nr_sectors = 128,
.name = "M25P64",
},
{
.idcode1 = 0x14,
.page_size = 256,
.pages_per_sector = 256,
.nr_sectors = 16,
.name = "M25P80",
},
{
.idcode1 = 0x18,
.page_size = 256,
.pages_per_sector = 1024,
.nr_sectors = 64,
.name = "M25P128",
},
};
static int stmicro_erase(struct spi_flash *flash, u32 offset, size_t len)
{
return spi_flash_cmd_erase(flash, CMD_M25PXX_SE, offset, len);
}
struct spi_flash *spi_flash_probe_stmicro(struct spi_slave *spi, u8 * idcode)
{
const struct stmicro_spi_flash_params *params;
struct spi_flash *flash;
unsigned int i;
if (idcode[0] == 0xff) {
i = spi_flash_cmd(spi, CMD_M25PXX_RES,
idcode, 4);
if (i)
return NULL;
if ((idcode[3] & 0xf0) == 0x10) {
idcode[0] = 0x20;
idcode[1] = 0x20;
idcode[2] = idcode[3] + 1;
} else
return NULL;
}
for (i = 0; i < ARRAY_SIZE(stmicro_spi_flash_table); i++) {
params = &stmicro_spi_flash_table[i];
if (params->idcode1 == idcode[2]) {
break;
}
}
if (i == ARRAY_SIZE(stmicro_spi_flash_table)) {
debug("SF: Unsupported STMicro 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 = stmicro_erase;
flash->read = spi_flash_cmd_read_fast;
flash->page_size = params->page_size;
flash->sector_size = params->page_size * params->pages_per_sector;
flash->size = flash->sector_size * params->nr_sectors;
return flash;
}
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