[U-Boot] [PATCH 2/7] mtd: SPI Flash: Support the Spansion Flash
Mingkai Hu
Mingkai.hu at freescale.com
Mon Mar 16 03:52:18 CET 2009
Add MTD SPI Flash support for S25FL008A, S25FL016A,
S25FL032A, S25FL064A, S25FL128P.
Signed-off-by: Mingkai Hu <Mingkai.hu at freescale.com>
---
drivers/mtd/spi/Makefile | 1 +
drivers/mtd/spi/spansion.c | 356 ++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 357 insertions(+), 0 deletions(-)
create mode 100644 drivers/mtd/spi/spansion.c
diff --git a/drivers/mtd/spi/Makefile b/drivers/mtd/spi/Makefile
index 3d4f892..3f46de2 100644
--- a/drivers/mtd/spi/Makefile
+++ b/drivers/mtd/spi/Makefile
@@ -28,6 +28,7 @@ LIB := $(obj)libspi_flash.a
COBJS-$(CONFIG_SPI_FLASH) += spi_flash.o
COBJS-$(CONFIG_SPI_FLASH_ATMEL) += atmel.o
COBJS-$(CONFIG_SPI_FLASH_STMICRO) += stmicro.o
+COBJS-$(CONFIG_SPI_FLASH_SPANSION) += spansion.o
COBJS := $(COBJS-y)
SRCS := $(COBJS:.o=.c)
diff --git a/drivers/mtd/spi/spansion.c b/drivers/mtd/spi/spansion.c
new file mode 100644
index 0000000..9de4b7b
--- /dev/null
+++ b/drivers/mtd/spi/spansion.c
@@ -0,0 +1,356 @@
+/*
+ * Copyright (C) 2009 Freescale Semiconductor, Inc.
+ *
+ * Author: Mingkai Hu (Mingkai.hu at freescale.com)
+ * Based on stmicro.c by Wolfgang Denk (wd at denx.de),
+ * TsiChung Liew (Tsi-Chung.Liew at freescale.com),
+ * and Jason McMullan (mcmullan at 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, 2 * CONFIG_SYS_HZ);
+ 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;
+ int ret;
+ u8 id[5] = {0};
+
+ ret = spi_flash_cmd(spi, CMD_READ_ID, id, sizeof(id));
+ if (ret)
+ return NULL;
+
+ jedec = id[1] << 8 | id[2];
+ ext_jedec = id[3] << 8 | id[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;
+}
--
1.5.4
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