COBJS-$(CONFIG_SPI_FLASH) += spi_flash.o
COBJS-$(CONFIG_SPI_FLASH_ATMEL) += atmel.o
+COBJS-$(CONFIG_SPI_FLASH_SPANSION) += spansion.o
+COBJS-$(CONFIG_SPI_FLASH_SST) += sst.o
COBJS-$(CONFIG_SPI_FLASH_STMICRO) += stmicro.o
COBJS := $(COBJS-y)
*
* Copyright (C) 2008 Atmel Corporation
*/
-#define DEBUG
+
#include <common.h>
#include <malloc.h>
#include <spi_flash.h>
}
static const struct atmel_spi_flash_params atmel_spi_flash_table[] = {
+ {
+ .idcode1 = 0x22,
+ .l2_page_size = 8,
+ .pages_per_block = 8,
+ .blocks_per_sector = 16,
+ .nr_sectors = 4,
+ .name = "AT45DB011D",
+ },
+ {
+ .idcode1 = 0x23,
+ .l2_page_size = 8,
+ .pages_per_block = 8,
+ .blocks_per_sector = 16,
+ .nr_sectors = 8,
+ .name = "AT45DB021D",
+ },
+ {
+ .idcode1 = 0x24,
+ .l2_page_size = 8,
+ .pages_per_block = 8,
+ .blocks_per_sector = 32,
+ .nr_sectors = 8,
+ .name = "AT45DB041D",
+ },
+ {
+ .idcode1 = 0x25,
+ .l2_page_size = 8,
+ .pages_per_block = 8,
+ .blocks_per_sector = 32,
+ .nr_sectors = 16,
+ .name = "AT45DB081D",
+ },
+ {
+ .idcode1 = 0x26,
+ .l2_page_size = 9,
+ .pages_per_block = 8,
+ .blocks_per_sector = 32,
+ .nr_sectors = 16,
+ .name = "AT45DB161D",
+ },
+ {
+ .idcode1 = 0x27,
+ .l2_page_size = 9,
+ .pages_per_block = 8,
+ .blocks_per_sector = 64,
+ .nr_sectors = 64,
+ .name = "AT45DB321D",
+ },
{
.idcode1 = 0x28,
.l2_page_size = 10,
--- /dev/null
+/*
+ * 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;
+}
*
* Copyright (C) 2008 Atmel Corporation
*/
-#define DEBUG
+
#include <common.h>
#include <malloc.h>
#include <spi.h>
struct spi_slave *spi;
struct spi_flash *flash;
int ret;
- u8 idcode[3];
+ u8 idcode[5];
spi = spi_setup_slave(bus, cs, max_hz, spi_mode);
if (!spi) {
if (ret)
goto err_read_id;
- debug("SF: Got idcode %02x %02x %02x\n", idcode[0],
- idcode[1], idcode[2]);
+ debug("SF: Got idcode %02x %02x %02x %02x %02x\n", idcode[0],
+ idcode[1], idcode[2], idcode[3], idcode[4]);
switch (idcode[0]) {
#ifdef CONFIG_SPI_FLASH_SPANSION
case 0x20:
flash = spi_flash_probe_stmicro(spi, idcode);
break;
+#endif
+#ifdef CONFIG_SPI_FLASH_SST
+ case 0xBF:
+ flash = spi_flash_probe_sst(spi, idcode);
+ break;
#endif
default:
debug("SF: Unsupported manufacturer %02X\n", idcode[0]);
* Copyright (C) 2008 Atmel Corporation
*/
-/* Common parameters */
-#define SPI_FLASH_PROG_TIMEOUT ((10 * CONFIG_SYS_HZ) / 1000)
-#define SPI_FLASH_PAGE_ERASE_TIMEOUT ((50 * CONFIG_SYS_HZ) / 1000)
+/* Common parameters -- kind of high, but they should only occur when there
+ * is a problem (and well your system already is broken), so err on the side
+ * of caution in case we're dealing with slower SPI buses and/or processors.
+ */
+#define SPI_FLASH_PROG_TIMEOUT (2 * CONFIG_SYS_HZ)
+#define SPI_FLASH_PAGE_ERASE_TIMEOUT (5 * CONFIG_SYS_HZ)
#define SPI_FLASH_SECTOR_ERASE_TIMEOUT (10 * CONFIG_SYS_HZ)
/* Common commands */
/* Manufacturer-specific probe functions */
struct spi_flash *spi_flash_probe_spansion(struct spi_slave *spi, u8 *idcode);
struct spi_flash *spi_flash_probe_atmel(struct spi_slave *spi, u8 *idcode);
+struct spi_flash *spi_flash_probe_sst(struct spi_slave *spi, u8 *idcode);
struct spi_flash *spi_flash_probe_stmicro(struct spi_slave *spi, u8 *idcode);
--- /dev/null
+/*
+ * Driver for SST serial flashes
+ *
+ * (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)
+ * Copyright (c) 2008-2009 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <common.h>
+#include <malloc.h>
+#include <spi_flash.h>
+
+#include "spi_flash_internal.h"
+
+#define CMD_SST_WREN 0x06 /* Write Enable */
+#define CMD_SST_WRDI 0x04 /* Write Disable */
+#define CMD_SST_RDSR 0x05 /* Read Status Register */
+#define CMD_SST_WRSR 0x01 /* Write Status Register */
+#define CMD_SST_READ 0x03 /* Read Data Bytes */
+#define CMD_SST_FAST_READ 0x0b /* Read Data Bytes at Higher Speed */
+#define CMD_SST_BP 0x02 /* Byte Program */
+#define CMD_SST_AAI_WP 0xAD /* Auto Address Increment Word Program */
+#define CMD_SST_SE 0x20 /* Sector Erase */
+
+#define SST_SR_WIP (1 << 0) /* Write-in-Progress */
+#define SST_SR_WEL (1 << 1) /* Write enable */
+#define SST_SR_BP0 (1 << 2) /* Block Protection 0 */
+#define SST_SR_BP1 (1 << 3) /* Block Protection 1 */
+#define SST_SR_BP2 (1 << 4) /* Block Protection 2 */
+#define SST_SR_AAI (1 << 6) /* Addressing mode */
+#define SST_SR_BPL (1 << 7) /* BP bits lock */
+
+struct sst_spi_flash_params {
+ u8 idcode1;
+ u16 nr_sectors;
+ const char *name;
+};
+
+struct sst_spi_flash {
+ struct spi_flash flash;
+ const struct sst_spi_flash_params *params;
+};
+
+static inline struct sst_spi_flash *to_sst_spi_flash(struct spi_flash *flash)
+{
+ return container_of(flash, struct sst_spi_flash, flash);
+}
+
+#define SST_SECTOR_SIZE (4 * 1024)
+static const struct sst_spi_flash_params sst_spi_flash_table[] = {
+ {
+ .idcode1 = 0x01,
+ .nr_sectors = 128,
+ .name = "SST25WF512",
+ },{
+ .idcode1 = 0x02,
+ .nr_sectors = 256,
+ .name = "SST25WF010",
+ },{
+ .idcode1 = 0x03,
+ .nr_sectors = 512,
+ .name = "SST25WF020",
+ },{
+ .idcode1 = 0x04,
+ .nr_sectors = 1024,
+ .name = "SST25WF040",
+ },
+};
+
+static int
+sst_wait_ready(struct spi_flash *flash, unsigned long timeout)
+{
+ struct spi_slave *spi = flash->spi;
+ unsigned long timebase;
+ int ret;
+ u8 byte = CMD_SST_RDSR;
+
+ ret = spi_xfer(spi, sizeof(byte) * 8, &byte, NULL, SPI_XFER_BEGIN);
+ if (ret) {
+ debug("SF: Failed to send command %02x: %d\n", byte, ret);
+ return ret;
+ }
+
+ timebase = get_timer(0);
+ do {
+ ret = spi_xfer(spi, sizeof(byte) * 8, NULL, &byte, 0);
+ if (ret)
+ break;
+
+ if ((byte & SST_SR_WIP) == 0)
+ break;
+
+ } while (get_timer(timebase) < timeout);
+
+ spi_xfer(spi, 0, NULL, NULL, SPI_XFER_END);
+
+ if (!ret && (byte & SST_SR_WIP) != 0)
+ ret = -1;
+
+ if (ret)
+ debug("SF: sst wait for ready timed out\n");
+ return ret;
+}
+
+static int
+sst_enable_writing(struct spi_flash *flash)
+{
+ int ret = spi_flash_cmd(flash->spi, CMD_SST_WREN, NULL, 0);
+ if (ret)
+ debug("SF: Enabling Write failed\n");
+ return ret;
+}
+
+static int
+sst_disable_writing(struct spi_flash *flash)
+{
+ int ret = spi_flash_cmd(flash->spi, CMD_SST_WRDI, NULL, 0);
+ if (ret)
+ debug("SF: Disabling Write failed\n");
+ return ret;
+}
+
+static int
+sst_read_fast(struct spi_flash *flash, u32 offset, size_t len, void *buf)
+{
+ u8 cmd[5] = {
+ CMD_READ_ARRAY_FAST,
+ offset >> 16,
+ offset >> 8,
+ offset,
+ 0x00,
+ };
+ return spi_flash_read_common(flash, cmd, sizeof(cmd), buf, len);
+}
+
+static int
+sst_byte_write(struct spi_flash *flash, u32 offset, const void *buf)
+{
+ int ret;
+ u8 cmd[4] = {
+ CMD_SST_BP,
+ offset >> 16,
+ offset >> 8,
+ offset,
+ };
+
+ debug("BP[%02x]: 0x%p => cmd = { 0x%02x 0x%06x }\n",
+ spi_w8r8(flash->spi, CMD_SST_RDSR), buf, cmd[0], offset);
+
+ ret = sst_enable_writing(flash);
+ if (ret)
+ return ret;
+
+ ret = spi_flash_cmd_write(flash->spi, cmd, sizeof(cmd), buf, 1);
+ if (ret)
+ return ret;
+
+ return sst_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT);
+}
+
+static int
+sst_write(struct spi_flash *flash, u32 offset, size_t len, const void *buf)
+{
+ size_t actual, cmd_len;
+ int ret;
+ u8 cmd[4];
+
+ ret = spi_claim_bus(flash->spi);
+ if (ret) {
+ debug("SF: Unable to claim SPI bus\n");
+ return ret;
+ }
+
+ /* If the data is not word aligned, write out leading single byte */
+ actual = offset % 2;
+ if (actual) {
+ ret = sst_byte_write(flash, offset, buf);
+ if (ret)
+ goto done;
+ }
+ offset += actual;
+
+ ret = sst_enable_writing(flash);
+ if (ret)
+ goto done;
+
+ cmd_len = 4;
+ cmd[0] = CMD_SST_AAI_WP;
+ cmd[1] = offset >> 16;
+ cmd[2] = offset >> 8;
+ cmd[3] = offset;
+
+ for (; actual < len - 1; actual += 2) {
+ debug("WP[%02x]: 0x%p => cmd = { 0x%02x 0x%06x }\n",
+ spi_w8r8(flash->spi, CMD_SST_RDSR), buf + actual, cmd[0],
+ offset);
+
+ ret = spi_flash_cmd_write(flash->spi, cmd, cmd_len,
+ buf + actual, 2);
+ if (ret) {
+ debug("SF: sst word program failed\n");
+ break;
+ }
+
+ ret = sst_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT);
+ if (ret)
+ break;
+
+ cmd_len = 1;
+ offset += 2;
+ }
+
+ if (!ret)
+ ret = sst_disable_writing(flash);
+
+ /* If there is a single trailing byte, write it out */
+ if (!ret && actual != len)
+ ret = sst_byte_write(flash, offset, buf + actual);
+
+ done:
+ debug("SF: sst: program %s %zu bytes @ 0x%zx\n",
+ ret ? "failure" : "success", len, offset - actual);
+
+ spi_release_bus(flash->spi);
+ return ret;
+}
+
+int
+sst_erase(struct spi_flash *flash, u32 offset, size_t len)
+{
+ unsigned long sector_size;
+ u32 start, end;
+ int ret;
+ u8 cmd[4];
+
+ /*
+ * This function currently uses sector erase only.
+ * Probably speed things up by using bulk erase
+ * when possible.
+ */
+
+ sector_size = SST_SECTOR_SIZE;
+
+ if (offset % sector_size) {
+ debug("SF: Erase offset not multiple of sector size\n");
+ return -1;
+ }
+
+ ret = spi_claim_bus(flash->spi);
+ if (ret) {
+ debug("SF: Unable to claim SPI bus\n");
+ return ret;
+ }
+
+ cmd[0] = CMD_SST_SE;
+ cmd[3] = 0;
+ start = offset;
+ end = start + len;
+
+ ret = 0;
+ while (offset < end) {
+ cmd[1] = offset >> 16;
+ cmd[2] = offset >> 8;
+ offset += sector_size;
+
+ debug("SF: erase %2x %2x %2x %2x (%x)\n", cmd[0], cmd[1],
+ cmd[2], cmd[3], offset);
+
+ ret = sst_enable_writing(flash);
+ if (ret)
+ break;
+
+ ret = spi_flash_cmd_write(flash->spi, cmd, sizeof(cmd), NULL, 0);
+ if (ret) {
+ debug("SF: sst page erase failed\n");
+ break;
+ }
+
+ ret = sst_wait_ready(flash, SPI_FLASH_PAGE_ERASE_TIMEOUT);
+ if (ret)
+ break;
+ }
+
+ debug("SF: sst: Successfully erased %lu bytes @ 0x%x\n",
+ len * sector_size, start);
+
+ spi_release_bus(flash->spi);
+ return ret;
+}
+
+static int
+sst_unlock(struct spi_flash *flash)
+{
+ int ret;
+ u8 cmd, status;
+
+ ret = sst_enable_writing(flash);
+ if (ret)
+ return ret;
+
+ cmd = CMD_SST_WRSR;
+ status = 0;
+ ret = spi_flash_cmd_write(flash->spi, &cmd, 1, &status, 1);
+ if (ret)
+ debug("SF: Unable to set status byte\n");
+
+ debug("SF: sst: status = %x\n", spi_w8r8(flash->spi, CMD_SST_RDSR));
+
+ return ret;
+}
+
+struct spi_flash *
+spi_flash_probe_sst(struct spi_slave *spi, u8 *idcode)
+{
+ const struct sst_spi_flash_params *params;
+ struct sst_spi_flash *stm;
+ size_t i;
+
+ for (i = 0; i < ARRAY_SIZE(sst_spi_flash_table); ++i) {
+ params = &sst_spi_flash_table[i];
+ if (params->idcode1 == idcode[2])
+ break;
+ }
+
+ if (i == ARRAY_SIZE(sst_spi_flash_table)) {
+ debug("SF: Unsupported SST ID %02x\n", idcode[1]);
+ return NULL;
+ }
+
+ stm = malloc(sizeof(*stm));
+ if (!stm) {
+ debug("SF: Failed to allocate memory\n");
+ return NULL;
+ }
+
+ stm->params = params;
+ stm->flash.spi = spi;
+ stm->flash.name = params->name;
+
+ stm->flash.write = sst_write;
+ stm->flash.erase = sst_erase;
+ stm->flash.read = sst_read_fast;
+ stm->flash.size = SST_SECTOR_SIZE * params->nr_sectors;
+
+ debug("SF: Detected %s with page size %u, total %u bytes\n",
+ params->name, SST_SECTOR_SIZE, stm->flash.size);
+
+ /* Flash powers up read-only, so clear BP# bits */
+ sst_unlock(&stm->flash);
+
+ return &stm->flash;
+}
struct spi_slave *spi = flash->spi;
unsigned long timebase;
int ret;
+ u8 cmd = CMD_M25PXX_RDSR;
u8 status;
- u8 cmd[4] = { CMD_M25PXX_RDSR, 0xff, 0xff, 0xff };
- ret = spi_xfer(spi, 32, &cmd[0], NULL, SPI_XFER_BEGIN);
+ ret = spi_xfer(spi, 8, &cmd, NULL, SPI_XFER_BEGIN);
if (ret) {
- debug("SF: Failed to send command %02x: %d\n", cmd[0], ret);
+ debug("SF: Failed to send command %02x: %d\n", cmd, ret);
return ret;
}
break;
}
- /* Up to 2 seconds */
- ret = stmicro_wait_ready(flash, 2 * CONFIG_SYS_HZ);
+ ret = stmicro_wait_ready(flash, SPI_FLASH_PAGE_ERASE_TIMEOUT);
if (ret < 0) {
debug("SF: STMicro page erase timed out\n");
break;
const struct stmicro_spi_flash_params *params;
struct stmicro_spi_flash *stm;
unsigned int i;
- int ret;
- u8 id[3];
-
- ret = spi_flash_cmd(spi, CMD_READ_ID, id, sizeof(id));
- if (ret)
- return NULL;
for (i = 0; i < ARRAY_SIZE(stmicro_spi_flash_table); i++) {
params = &stmicro_spi_flash_table[i];
}
if (i == ARRAY_SIZE(stmicro_spi_flash_table)) {
- debug("SF: Unsupported STMicro ID %02x\n", id[1]);
+ debug("SF: Unsupported STMicro ID %02x\n", idcode[1]);
return NULL;
}
projects / u-boot / commitdiff