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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 <stdlib.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 */
#define STM_ID_M25P10 0x11
#define STM_ID_M25P16 0x15
#define STM_ID_M25P20 0x12
#define STM_ID_M25P32 0x16
#define STM_ID_M25P40 0x13
#define STM_ID_M25P64 0x17
#define STM_ID_M25P80 0x14
#define STM_ID_M25P128 0x18
struct stmicro_spi_flash_params {
u8 idcode1;
u16 page_size;
u16 pages_per_sector;
u16 nr_sectors;
const char *name;
};
/* spi_flash needs to be first so upper layers can free() it */
struct stmicro_spi_flash {
struct spi_flash flash;
const struct stmicro_spi_flash_params *params;
};
static inline struct stmicro_spi_flash *to_stmicro_spi_flash(struct spi_flash
*flash)
{
return container_of(flash, struct stmicro_spi_flash, flash);
}
static const struct stmicro_spi_flash_params stmicro_spi_flash_table[] = {
{
.idcode1 = STM_ID_M25P10,
.page_size = 256,
.pages_per_sector = 128,
.nr_sectors = 4,
.name = "M25P10",
},
{
.idcode1 = STM_ID_M25P16,
.page_size = 256,
.pages_per_sector = 256,
.nr_sectors = 32,
.name = "M25P16",
},
{
.idcode1 = STM_ID_M25P20,
.page_size = 256,
.pages_per_sector = 256,
.nr_sectors = 4,
.name = "M25P20",
},
{
.idcode1 = STM_ID_M25P32,
.page_size = 256,
.pages_per_sector = 256,
.nr_sectors = 64,
.name = "M25P32",
},
{
.idcode1 = STM_ID_M25P40,
.page_size = 256,
.pages_per_sector = 256,
.nr_sectors = 8,
.name = "M25P40",
},
{
.idcode1 = STM_ID_M25P64,
.page_size = 256,
.pages_per_sector = 256,
.nr_sectors = 128,
.name = "M25P64",
},
{
.idcode1 = STM_ID_M25P80,
.page_size = 256,
.pages_per_sector = 256,
.nr_sectors = 16,
.name = "M25P80",
},
{
.idcode1 = STM_ID_M25P128,
.page_size = 256,
.pages_per_sector = 1024,
.nr_sectors = 64,
.name = "M25P128",
},
};
static int stmicro_write(struct spi_flash *flash,
u32 offset, size_t len, const void *buf)
{
struct stmicro_spi_flash *stm = to_stmicro_spi_flash(flash);
unsigned long byte_addr;
unsigned long page_size;
size_t chunk_len;
size_t actual;
int ret;
u8 cmd[4];
page_size = min(stm->params->page_size, CONTROLLER_PAGE_LIMIT);
byte_addr = offset % page_size;
flash->spi->rw = SPI_WRITE_FLAG;
ret = spi_claim_bus(flash->spi);
if (ret) {
printk(BIOS_WARNING, "SF: Unable to claim SPI bus\n");
return ret;
}
for (actual = 0; actual < len; actual += chunk_len) {
chunk_len = min(len - actual, page_size - byte_addr);
cmd[0] = CMD_M25PXX_PP;
cmd[1] = (offset >> 16) & 0xff;
cmd[2] = (offset >> 8) & 0xff;
cmd[3] = offset & 0xff;
#if CONFIG_DEBUG_SPI_FLASH
printk(BIOS_SPEW, "PP: 0x%p => cmd = { 0x%02x 0x%02x%02x%02x }"
" chunk_len = %zu\n",
buf + actual, cmd[0], cmd[1], cmd[2], cmd[3], chunk_len);
#endif
ret = spi_flash_cmd(flash->spi, CMD_M25PXX_WREN, NULL, 0);
if (ret < 0) {
printk(BIOS_WARNING, "SF: Enabling Write failed\n");
goto out;
}
ret = spi_flash_cmd_write(flash->spi, cmd, 4,
buf + actual, chunk_len);
if (ret < 0) {
printk(BIOS_WARNING, "SF: STMicro Page Program failed\n");
goto out;
}
ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT);
if (ret)
goto out;
offset += chunk_len;
byte_addr = 0;
}
#if CONFIG_DEBUG_SPI_FLASH
printk(BIOS_SPEW, "SF: STMicro: Successfully programmed %zu bytes @"
" 0x%lx\n", len, (unsigned long)(offset - len));
#endif
ret = 0;
out:
spi_release_bus(flash->spi);
return ret;
}
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 stmicro_spi_flash *stm;
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)) {
printk(BIOS_WARNING, "SF: Unsupported STMicro ID %02x\n", idcode[1]);
return NULL;
}
stm = malloc(sizeof(struct stmicro_spi_flash));
if (!stm) {
printk(BIOS_WARNING, "SF: Failed to allocate memory\n");
return NULL;
}
stm->params = params;
stm->flash.spi = spi;
stm->flash.name = params->name;
stm->flash.write = stmicro_write;
stm->flash.erase = stmicro_erase;
stm->flash.read = spi_flash_cmd_read_fast;
stm->flash.sector_size = params->page_size * params->pages_per_sector;
stm->flash.size = stm->flash.sector_size * params->nr_sectors;
return &stm->flash;
}
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