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u-boot/drivers/mtd/spi/spansion.c

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/*
* Copyright (C) 2009 Freescale Semiconductor, Inc.
*
* Author: Mingkai Hu (Mingkai.hu@freescale.com)
* Based on stmicro.c by Wolfgang Denk (wd@denx.de),
* TsiChung Liew (Tsi-Chung.Liew@freescale.com),
* and Jason McMullan (mcmullan@netapp.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"
/* S25FLxx-specific commands */
#define CMD_S25FLXX_READ 0x03 /* Read Data Bytes */
#define CMD_S25FLXX_FAST_READ 0x0b /* Read Data Bytes at Higher Speed */
#define CMD_S25FLXX_READID 0x90 /* Read Manufacture ID and Device ID */
#define CMD_S25FLXX_WREN 0x06 /* Write Enable */
#define CMD_S25FLXX_WRDI 0x04 /* Write Disable */
#define CMD_S25FLXX_RDSR 0x05 /* Read Status Register */
#define CMD_S25FLXX_WRSR 0x01 /* Write Status Register */
#define CMD_S25FLXX_PP 0x02 /* Page Program */
#define CMD_S25FLXX_SE 0xd8 /* Sector Erase */
#define CMD_S25FLXX_BE 0xc7 /* Bulk Erase */
#define CMD_S25FLXX_DP 0xb9 /* Deep Power-down */
#define CMD_S25FLXX_RES 0xab /* Release from DP, and Read Signature */
#define SPSN_ID_S25FL008A 0x0213
#define SPSN_ID_S25FL016A 0x0214
#define SPSN_ID_S25FL032A 0x0215
#define SPSN_ID_S25FL064A 0x0216
#define SPSN_ID_S25FL128P 0x2018
#define SPSN_EXT_ID_S25FL128P_256KB 0x0300
#define SPSN_EXT_ID_S25FL128P_64KB 0x0301
#define SPANSION_SR_WIP (1 << 0) /* Write-in-Progress */
struct spansion_spi_flash_params {
u16 idcode1;
u16 idcode2;
u16 page_size;
u16 pages_per_sector;
u16 nr_sectors;
const char *name;
};
struct spansion_spi_flash {
struct spi_flash flash;
const struct spansion_spi_flash_params *params;
};
static inline struct spansion_spi_flash *to_spansion_spi_flash(struct spi_flash
*flash)
{
return container_of(flash, struct spansion_spi_flash, flash);
}
static const struct spansion_spi_flash_params spansion_spi_flash_table[] = {
{
.idcode1 = SPSN_ID_S25FL008A,
.idcode2 = 0,
.page_size = 256,
.pages_per_sector = 256,
.nr_sectors = 16,
.name = "S25FL008A",
},
{
.idcode1 = SPSN_ID_S25FL016A,
.idcode2 = 0,
.page_size = 256,
.pages_per_sector = 256,
.nr_sectors = 32,
.name = "S25FL016A",
},
{
.idcode1 = SPSN_ID_S25FL032A,
.idcode2 = 0,
.page_size = 256,
.pages_per_sector = 256,
.nr_sectors = 64,
.name = "S25FL032A",
},
{
.idcode1 = SPSN_ID_S25FL064A,
.idcode2 = 0,
.page_size = 256,
.pages_per_sector = 256,
.nr_sectors = 128,
.name = "S25FL064A",
},
{
.idcode1 = SPSN_ID_S25FL128P,
.idcode2 = SPSN_EXT_ID_S25FL128P_64KB,
.page_size = 256,
.pages_per_sector = 256,
.nr_sectors = 256,
.name = "S25FL128P_64K",
},
{
.idcode1 = SPSN_ID_S25FL128P,
.idcode2 = SPSN_EXT_ID_S25FL128P_256KB,
.page_size = 256,
.pages_per_sector = 1024,
.nr_sectors = 64,
.name = "S25FL128P_256K",
},
};
static int spansion_wait_ready(struct spi_flash *flash, unsigned long timeout)
{
struct spi_slave *spi = flash->spi;
unsigned long timebase;
int ret;
u8 status;
timebase = get_timer(0);
do {
ret = spi_flash_cmd(spi, CMD_S25FLXX_RDSR, &status, sizeof(status));
if (ret)
return -1;
if ((status & SPANSION_SR_WIP) == 0)
break;
} while (get_timer(timebase) < timeout);
if ((status & SPANSION_SR_WIP) == 0)
return 0;
/* Timed out */
return -1;
}
static int spansion_read_fast(struct spi_flash *flash,
u32 offset, size_t len, void *buf)
{
struct spansion_spi_flash *spsn = to_spansion_spi_flash(flash);
unsigned long page_addr;
unsigned long page_size;
u8 cmd[5];
page_size = spsn->params->page_size;
page_addr = offset / page_size;
cmd[0] = CMD_READ_ARRAY_FAST;
cmd[1] = page_addr >> 8;
cmd[2] = page_addr;
cmd[3] = offset % page_size;
cmd[4] = 0x00;
debug
("READ: 0x%x => cmd = { 0x%02x 0x%02x%02x%02x%02x } len = 0x%x\n",
offset, cmd[0], cmd[1], cmd[2], cmd[3], cmd[4], len);
return spi_flash_read_common(flash, cmd, sizeof(cmd), buf, len);
}
static int spansion_write(struct spi_flash *flash,
u32 offset, size_t len, const void *buf)
{
struct spansion_spi_flash *spsn = to_spansion_spi_flash(flash);
unsigned long page_addr;
unsigned long byte_addr;
unsigned long page_size;
size_t chunk_len;
size_t actual;
int ret;
u8 cmd[4];
page_size = spsn->params->page_size;
page_addr = offset / page_size;
byte_addr = offset % page_size;
ret = spi_claim_bus(flash->spi);
if (ret) {
debug("SF: Unable to claim SPI bus\n");
return ret;
}
ret = 0;
for (actual = 0; actual < len; actual += chunk_len) {
chunk_len = min(len - actual, page_size - byte_addr);
cmd[0] = CMD_S25FLXX_PP;
cmd[1] = page_addr >> 8;
cmd[2] = page_addr;
cmd[3] = byte_addr;
debug
("PP: 0x%p => cmd = { 0x%02x 0x%02x%02x%02x } chunk_len = %d\n",
buf + actual, cmd[0], cmd[1], cmd[2], cmd[3], chunk_len);
ret = spi_flash_cmd(flash->spi, CMD_S25FLXX_WREN, NULL, 0);
if (ret < 0) {
debug("SF: Enabling Write failed\n");
break;
}
ret = spi_flash_cmd_write(flash->spi, cmd, 4,
buf + actual, chunk_len);
if (ret < 0) {
debug("SF: SPANSION Page Program failed\n");
break;
}
ret = spansion_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT);
if (ret < 0) {
debug("SF: SPANSION page programming timed out\n");
break;
}
page_addr++;
byte_addr = 0;
}
debug("SF: SPANSION: Successfully programmed %u bytes @ 0x%x\n",
len, offset);
spi_release_bus(flash->spi);
return ret;
}
int spansion_erase(struct spi_flash *flash, u32 offset, size_t len)
{
struct spansion_spi_flash *spsn = to_spansion_spi_flash(flash);
unsigned long sector_size;
size_t actual;
int ret;
u8 cmd[4];
/*
* This function currently uses sector erase only.
* probably speed things up by using bulk erase
* when possible.
*/
sector_size = spsn->params->page_size * spsn->params->pages_per_sector;
if (offset % sector_size || len % sector_size) {
debug("SF: Erase offset/length not multiple of sector size\n");
return -1;
}
len /= sector_size;
cmd[0] = CMD_S25FLXX_SE;
cmd[2] = 0x00;
cmd[3] = 0x00;
ret = spi_claim_bus(flash->spi);
if (ret) {
debug("SF: Unable to claim SPI bus\n");
return ret;
}
ret = 0;
for (actual = 0; actual < len; actual++) {
cmd[1] = (offset / sector_size) + actual;
ret = spi_flash_cmd(flash->spi, CMD_S25FLXX_WREN, NULL, 0);
if (ret < 0) {
debug("SF: Enabling Write failed\n");
break;
}
ret = spi_flash_cmd_write(flash->spi, cmd, 4, NULL, 0);
if (ret < 0) {
debug("SF: SPANSION page erase failed\n");
break;
}
/* Up to 2 seconds */
ret = spansion_wait_ready(flash, SPI_FLASH_PAGE_ERASE_TIMEOUT);
if (ret < 0) {
debug("SF: SPANSION page erase timed out\n");
break;
}
}
debug("SF: SPANSION: Successfully erased %u bytes @ 0x%x\n",
len * sector_size, offset);
spi_release_bus(flash->spi);
return ret;
}
struct spi_flash *spi_flash_probe_spansion(struct spi_slave *spi, u8 *idcode)
{
const struct spansion_spi_flash_params *params;
struct spansion_spi_flash *spsn;
unsigned int i;
unsigned short jedec, ext_jedec;
jedec = idcode[1] << 8 | idcode[2];
ext_jedec = idcode[3] << 8 | idcode[4];
for (i = 0; i < ARRAY_SIZE(spansion_spi_flash_table); i++) {
params = &spansion_spi_flash_table[i];
if (params->idcode1 == jedec) {
if (params->idcode2 == ext_jedec)
break;
}
}
if (i == ARRAY_SIZE(spansion_spi_flash_table)) {
debug("SF: Unsupported SPANSION ID %04x %04x\n", jedec, ext_jedec);
return NULL;
}
spsn = malloc(sizeof(struct spansion_spi_flash));
if (!spsn) {
debug("SF: Failed to allocate memory\n");
return NULL;
}
spsn->params = params;
spsn->flash.spi = spi;
spsn->flash.name = params->name;
spsn->flash.write = spansion_write;
spsn->flash.erase = spansion_erase;
spsn->flash.read = spansion_read_fast;
spsn->flash.size = params->page_size * params->pages_per_sector
* params->nr_sectors;
debug("SF: Detected %s with page size %u, total %u bytes\n",
params->name, params->page_size, spsn->flash.size);
return &spsn->flash;
}
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