[U-Boot] [PATCH] mtd: SPI Flash: Support the STMicro Flash
Tsi-Chung Liew
Tsi-Chung.Liew at freescale.com
Thu Aug 28 14:16:13 CEST 2008
From: TsiChung Liew <Tsi-Chung.Liew at freescale.com>
Add MTD SPI Flash support for M25P16, M25P20, M25P32,
M25P40, M25P64, M25P80, M25P128.
Signed-off-by: Jason McMullan <mcmullan at netapp.com>
Signed-off-by: TsiChung Liew <Tsi-Chung.Liew at freescale.com>
---
drivers/mtd/spi/Makefile | 1 +
drivers/mtd/spi/spi_flash.c | 5 +
drivers/mtd/spi/spi_flash_internal.h | 1 +
drivers/mtd/spi/stmicro.c | 356 ++++++++++++++++++++++++++++++++++
4 files changed, 363 insertions(+), 0 deletions(-)
create mode 100644 drivers/mtd/spi/stmicro.c
diff --git a/drivers/mtd/spi/Makefile b/drivers/mtd/spi/Makefile
index af6af97..3d4f892 100644
--- a/drivers/mtd/spi/Makefile
+++ b/drivers/mtd/spi/Makefile
@@ -27,6 +27,7 @@ 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 := $(COBJS-y)
SRCS := $(COBJS:.o=.c)
diff --git a/drivers/mtd/spi/spi_flash.c b/drivers/mtd/spi/spi_flash.c
index d581cb3..d1d81af 100644
--- a/drivers/mtd/spi/spi_flash.c
+++ b/drivers/mtd/spi/spi_flash.c
@@ -134,6 +134,11 @@ struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs,
flash = spi_flash_probe_atmel(spi, idcode);
break;
#endif
+#ifdef CONFIG_SPI_FLASH_STMICRO
+ case 0x20:
+ flash = spi_flash_probe_stmicro(spi, idcode);
+ break;
+#endif
default:
debug("SF: Unsupported manufacturer %02X\n", idcode[0]);
flash = NULL;
diff --git a/drivers/mtd/spi/spi_flash_internal.h b/drivers/mtd/spi/spi_flash_internal.h
index 1438050..e5f758e 100644
--- a/drivers/mtd/spi/spi_flash_internal.h
+++ b/drivers/mtd/spi/spi_flash_internal.h
@@ -43,3 +43,4 @@ int spi_flash_read_common(struct spi_flash *flash, const u8 *cmd,
/* 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_stmicro(struct spi_slave *spi, u8 *idcode);
diff --git a/drivers/mtd/spi/stmicro.c b/drivers/mtd/spi/stmicro.c
new file mode 100644
index 0000000..c999b12
--- /dev/null
+++ b/drivers/mtd/spi/stmicro.c
@@ -0,0 +1,356 @@
+/*
+ * (C) Copyright 2000-2002
+ * Wolfgang Denk, DENX Software Engineering, wd at denx.de.
+ *
+ * Copyright 2008, Network Appliance Inc.
+ * Jason McMullan <mcmullan at netapp.com>
+ *
+ * Copyright (C) 2004-2007 Freescale Semiconductor, Inc.
+ * TsiChung Liew (Tsi-Chung.Liew at 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 */
+
+#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
+
+#define STMICRO_SR_WIP (1 << 0) /* Write-in-Progress */
+
+struct stmicro_spi_flash_params {
+ u8 idcode1;
+ u16 page_size;
+ u16 pages_per_sector;
+ u16 nr_sectors;
+ const char *name;
+};
+
+struct stmicro_spi_flash {
+ const struct stmicro_spi_flash_params *params;
+ struct spi_flash flash;
+};
+
+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_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_wait_ready(struct spi_flash *flash, unsigned long timeout)
+{
+ struct spi_slave *spi = flash->spi;
+ unsigned long timebase;
+ int ret;
+ u8 status;
+ u8 cmd[4] = { CMD_M25PXX_RDSR, 0xff, 0xff, 0xff };
+
+ ret = spi_xfer(spi, 32, &cmd[0], NULL, SPI_XFER_BEGIN);
+ if (ret) {
+ debug("SF: Failed to send command %02x: %d\n", cmd, ret);
+ return ret;
+ }
+
+ timebase = get_timer(0);
+ do {
+ ret = spi_xfer(spi, 8, NULL, &status, 0);
+ if (ret)
+ return -1;
+
+ if ((status & STMICRO_SR_WIP) == 0)
+ break;
+
+ } while (get_timer(timebase) < timeout);
+
+ spi_xfer(spi, 0, NULL, NULL, SPI_XFER_END);
+
+ if ((status & STMICRO_SR_WIP) == 0)
+ return 0;
+
+ /* Timed out */
+ return -1;
+}
+
+static int stmicro_read_fast(struct spi_flash *flash,
+ u32 offset, size_t len, void *buf)
+{
+ struct stmicro_spi_flash *stm = to_stmicro_spi_flash(flash);
+ unsigned long page_addr;
+ unsigned long page_size;
+ u8 cmd[5];
+
+ page_size = stm->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;
+
+ return spi_flash_read_common(flash, cmd, sizeof(cmd), buf, len);
+}
+
+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 page_addr;
+ unsigned long byte_addr;
+ unsigned long page_size;
+ size_t chunk_len;
+ size_t actual;
+ int ret;
+ u8 cmd[4];
+
+ page_size = stm->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_M25PXX_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_M25PXX_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: STMicro Page Program failed\n");
+ break;
+ }
+
+ ret = stmicro_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT);
+ if (ret < 0) {
+ debug("SF: STMicro page programming timed out\n");
+ break;
+ }
+
+ page_addr++;
+ byte_addr = 0;
+ }
+
+ debug("SF: STMicro: Successfully programmed %u bytes @ 0x%x\n",
+ len, offset);
+
+ spi_release_bus(flash->spi);
+ return ret;
+}
+
+int stmicro_erase(struct spi_flash *flash, u32 offset, size_t len)
+{
+ struct stmicro_spi_flash *stm = to_stmicro_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 = stm->params->page_size * stm->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_M25PXX_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_M25PXX_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: STMicro page erase failed\n");
+ break;
+ }
+
+ /* Up to 2 seconds */
+ ret = stmicro_wait_ready(flash, 2 * CFG_HZ);
+ if (ret < 0) {
+ debug("SF: STMicro page erase timed out\n");
+ break;
+ }
+ }
+
+ debug("SF: STMicro: Successfully erased %u bytes @ 0x%x\n",
+ len * sector_size, offset);
+
+ spi_release_bus(flash->spi);
+ return ret;
+}
+
+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;
+ 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 (params->idcode1 == idcode[2]) {
+ break;
+ }
+ }
+
+ if (i == ARRAY_SIZE(stmicro_spi_flash_table)) {
+ debug("SF: Unsupported STMicro ID %02x\n", id[1]);
+ return NULL;
+ }
+
+ stm = malloc(sizeof(struct stmicro_spi_flash));
+ 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 = stmicro_write;
+ stm->flash.erase = stmicro_erase;
+ stm->flash.read = stmicro_read_fast;
+ stm->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, stm->flash.size);
+
+ return &stm->flash;
+}
--
1.5.6.4
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