diff options
author | Justin Waters <justin.waters@timesys.com> | 2009-06-17 10:09:00 -0400 |
---|---|---|
committer | Justin Waters <justin.waters@timesys.com> | 2009-06-17 10:09:00 -0400 |
commit | 4e35d9f7af6cb5d553511d6064f224885fd905f4 (patch) | |
tree | 7ae0aec6dffc515af7c84c1d25f9c4ec6d0bc9f6 /drivers/mtd/spi | |
parent | 180a90abdae72587c0f679edf8991455e559440d (diff) |
Add omapl137 support1.3.3-omapl137-evm-200906171409
Diffstat (limited to 'drivers/mtd/spi')
-rw-r--r-- | drivers/mtd/spi/Makefile | 49 | ||||
-rw-r--r-- | drivers/mtd/spi/atmel.c | 362 | ||||
-rw-r--r-- | drivers/mtd/spi/spi_flash.c | 172 | ||||
-rw-r--r-- | drivers/mtd/spi/spi_flash_internal.h | 47 | ||||
-rw-r--r-- | drivers/mtd/spi/stmicro.c | 356 | ||||
-rw-r--r-- | drivers/mtd/spi/winbond.c | 334 |
6 files changed, 1320 insertions, 0 deletions
diff --git a/drivers/mtd/spi/Makefile b/drivers/mtd/spi/Makefile new file mode 100644 index 00000000000..5941235d8ac --- /dev/null +++ b/drivers/mtd/spi/Makefile @@ -0,0 +1,49 @@ +# +# (C) Copyright 2006 +# Wolfgang Denk, DENX Software Engineering, wd@denx.de. +# +# 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 $(TOPDIR)/config.mk + +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_WINBOND) += winbond.o + +COBJS := $(COBJS-y) +SRCS := $(COBJS:.o=.c) +OBJS := $(addprefix $(obj),$(COBJS)) + +all: $(LIB) + +$(LIB): $(obj).depend $(OBJS) + $(AR) $(ARFLAGS) $@ $(OBJS) + +######################################################################### + +# defines $(obj).depend target +include $(SRCTREE)/rules.mk + +sinclude $(obj).depend + +######################################################################### diff --git a/drivers/mtd/spi/atmel.c b/drivers/mtd/spi/atmel.c new file mode 100644 index 00000000000..fb7a4a939b0 --- /dev/null +++ b/drivers/mtd/spi/atmel.c @@ -0,0 +1,362 @@ +/* + * Atmel SPI DataFlash support + * + * Copyright (C) 2008 Atmel Corporation + */ +#define DEBUG +#include <common.h> +#include <malloc.h> +#include <spi_flash.h> + +#include "spi_flash_internal.h" + +/* AT45-specific commands */ +#define CMD_AT45_READ_STATUS 0xd7 +#define CMD_AT45_ERASE_PAGE 0x81 +#define CMD_AT45_LOAD_PROG_BUF1 0x82 +#define CMD_AT45_LOAD_BUF1 0x84 +#define CMD_AT45_LOAD_PROG_BUF2 0x85 +#define CMD_AT45_LOAD_BUF2 0x87 +#define CMD_AT45_PROG_BUF1 0x88 +#define CMD_AT45_PROG_BUF2 0x89 + +/* AT45 status register bits */ +#define AT45_STATUS_P2_PAGE_SIZE (1 << 0) +#define AT45_STATUS_READY (1 << 7) + +/* DataFlash family IDs, as obtained from the second idcode byte */ +#define DF_FAMILY_AT26F 0 +#define DF_FAMILY_AT45 1 +#define DF_FAMILY_AT26DF 2 /* AT25DF and AT26DF */ + +struct atmel_spi_flash_params { + u8 idcode1; + /* Log2 of page size in power-of-two mode */ + u8 l2_page_size; + u8 pages_per_block; + u8 blocks_per_sector; + u8 nr_sectors; + const char *name; +}; + +struct atmel_spi_flash { + const struct atmel_spi_flash_params *params; + struct spi_flash flash; +}; + +static inline struct atmel_spi_flash * +to_atmel_spi_flash(struct spi_flash *flash) +{ + return container_of(flash, struct atmel_spi_flash, flash); +} + +static const struct atmel_spi_flash_params atmel_spi_flash_table[] = { + { + .idcode1 = 0x28, + .l2_page_size = 10, + .pages_per_block = 8, + .blocks_per_sector = 32, + .nr_sectors = 32, + .name = "AT45DB642D", + }, +}; + +static int at45_wait_ready(struct spi_flash *flash, unsigned long timeout) +{ + struct spi_slave *spi = flash->spi; + unsigned long timebase; + int ret; + u8 cmd = CMD_AT45_READ_STATUS; + u8 status; + + timebase = get_timer(0); + + ret = spi_xfer(spi, 8, &cmd, NULL, SPI_XFER_BEGIN); + if (ret) + return -1; + + do { + ret = spi_xfer(spi, 8, NULL, &status, 0); + if (ret) + return -1; + + if (status & AT45_STATUS_READY) + break; + } while (get_timer(timebase) < timeout); + + /* Deactivate CS */ + spi_xfer(spi, 0, NULL, NULL, SPI_XFER_END); + + if (status & AT45_STATUS_READY) + return 0; + + /* Timed out */ + return -1; +} + +/* + * Assemble the address part of a command for AT45 devices in + * non-power-of-two page size mode. + */ +static void at45_build_address(struct atmel_spi_flash *asf, u8 *cmd, u32 offset) +{ + unsigned long page_addr; + unsigned long byte_addr; + unsigned long page_size; + unsigned int page_shift; + + /* + * The "extra" space per page is the power-of-two page size + * divided by 32. + */ + page_shift = asf->params->l2_page_size; + page_size = (1 << page_shift) + (1 << (page_shift - 5)); + page_shift++; + page_addr = offset / page_size; + byte_addr = offset % page_size; + + cmd[0] = page_addr >> (16 - page_shift); + cmd[1] = page_addr << (page_shift - 8) | (byte_addr >> 8); + cmd[2] = byte_addr; +} + +static int dataflash_read_fast_p2(struct spi_flash *flash, + u32 offset, size_t len, void *buf) +{ + u8 cmd[5]; + + cmd[0] = CMD_READ_ARRAY_FAST; + cmd[1] = offset >> 16; + cmd[2] = offset >> 8; + cmd[3] = offset; + cmd[4] = 0x00; + + return spi_flash_read_common(flash, cmd, sizeof(cmd), buf, len); +} + +static int dataflash_read_fast_at45(struct spi_flash *flash, + u32 offset, size_t len, void *buf) +{ + struct atmel_spi_flash *asf = to_atmel_spi_flash(flash); + u8 cmd[5]; + + cmd[0] = CMD_READ_ARRAY_FAST; + at45_build_address(asf, cmd + 1, offset); + cmd[4] = 0x00; + + return spi_flash_read_common(flash, cmd, sizeof(cmd), buf, len); +} + +static int dataflash_write_at45(struct spi_flash *flash, + u32 offset, size_t len, const void *buf) +{ + struct atmel_spi_flash *asf = to_atmel_spi_flash(flash); + unsigned long page_addr; + unsigned long byte_addr; + unsigned long page_size; + unsigned int page_shift; + size_t chunk_len; + size_t actual; + int ret; + u8 cmd[4]; + + page_shift = asf->params->l2_page_size; + page_size = (1 << page_shift) + (1 << (page_shift - 5)); + page_shift++; + 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; + } + + for (actual = 0; actual < len; actual += chunk_len) { + chunk_len = min(len - actual, page_size - byte_addr); + + /* Use the same address bits for both commands */ + cmd[0] = CMD_AT45_LOAD_BUF1; + cmd[1] = page_addr >> (16 - page_shift); + cmd[2] = page_addr << (page_shift - 8) | (byte_addr >> 8); + cmd[3] = byte_addr; + + ret = spi_flash_cmd_write(flash->spi, cmd, 4, + buf + actual, chunk_len); + if (ret < 0) { + debug("SF: Loading AT45 buffer failed\n"); + goto out; + } + + cmd[0] = CMD_AT45_PROG_BUF1; + ret = spi_flash_cmd_write(flash->spi, cmd, 4, NULL, 0); + if (ret < 0) { + debug("SF: AT45 page programming failed\n"); + goto out; + } + + ret = at45_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT); + if (ret < 0) { + debug("SF: AT45 page programming timed out\n"); + goto out; + } + + page_addr++; + byte_addr = 0; + } + + debug("SF: AT45: Successfully programmed %u bytes @ 0x%x\n", + len, offset); + ret = 0; + +out: + spi_release_bus(flash->spi); + return ret; +} + +int dataflash_erase_at45(struct spi_flash *flash, u32 offset, size_t len) +{ + struct atmel_spi_flash *asf = to_atmel_spi_flash(flash); + unsigned long page_addr; + unsigned long page_size; + unsigned int page_shift; + size_t actual; + int ret; + u8 cmd[4]; + + /* + * TODO: This function currently uses page erase only. We can + * probably speed things up by using block and/or sector erase + * when possible. + */ + + page_shift = asf->params->l2_page_size; + page_size = (1 << page_shift) + (1 << (page_shift - 5)); + page_shift++; + page_addr = offset / page_size; + + if (offset % page_size || len % page_size) { + debug("SF: Erase offset/length not multiple of page size\n"); + return -1; + } + + cmd[0] = CMD_AT45_ERASE_PAGE; + cmd[3] = 0x00; + + ret = spi_claim_bus(flash->spi); + if (ret) { + debug("SF: Unable to claim SPI bus\n"); + return ret; + } + + for (actual = 0; actual < len; actual += page_size) { + cmd[1] = page_addr >> (16 - page_shift); + cmd[2] = page_addr << (page_shift - 8); + + ret = spi_flash_cmd_write(flash->spi, cmd, 4, NULL, 0); + if (ret < 0) { + debug("SF: AT45 page erase failed\n"); + goto out; + } + + ret = at45_wait_ready(flash, SPI_FLASH_PAGE_ERASE_TIMEOUT); + if (ret < 0) { + debug("SF: AT45 page erase timed out\n"); + goto out; + } + + page_addr++; + } + + debug("SF: AT45: Successfully erased %u bytes @ 0x%x\n", + len, offset); + ret = 0; + +out: + spi_release_bus(flash->spi); + return ret; +} + +struct spi_flash *spi_flash_probe_atmel(struct spi_slave *spi, u8 *idcode) +{ + const struct atmel_spi_flash_params *params; + unsigned long page_size; + unsigned int family; + struct atmel_spi_flash *asf; + unsigned int i; + int ret; + u8 status; + + for (i = 0; i < ARRAY_SIZE(atmel_spi_flash_table); i++) { + params = &atmel_spi_flash_table[i]; + if (params->idcode1 == idcode[1]) + break; + } + + if (i == ARRAY_SIZE(atmel_spi_flash_table)) { + debug("SF: Unsupported DataFlash ID %02x\n", + idcode[1]); + return NULL; + } + + asf = malloc(sizeof(struct atmel_spi_flash)); + if (!asf) { + debug("SF: Failed to allocate memory\n"); + return NULL; + } + + asf->params = params; + asf->flash.spi = spi; + asf->flash.name = params->name; + + /* Assuming power-of-two page size initially. */ + page_size = 1 << params->l2_page_size; + + family = idcode[1] >> 5; + + switch (family) { + case DF_FAMILY_AT45: + /* + * AT45 chips have configurable page size. The status + * register indicates which configuration is active. + */ + ret = spi_flash_cmd(spi, CMD_AT45_READ_STATUS, &status, 1); + if (ret) + goto err; + + debug("SF: AT45 status register: %02x\n", status); + + if (!(status & AT45_STATUS_P2_PAGE_SIZE)) { + asf->flash.read = dataflash_read_fast_at45; + asf->flash.write = dataflash_write_at45; + asf->flash.erase = dataflash_erase_at45; + page_size += 1 << (params->l2_page_size - 5); + } else { + asf->flash.read = dataflash_read_fast_p2; + } + + break; + + case DF_FAMILY_AT26F: + case DF_FAMILY_AT26DF: + asf->flash.read = dataflash_read_fast_p2; + break; + + default: + debug("SF: Unsupported DataFlash family %u\n", family); + goto err; + } + + asf->flash.size = page_size * params->pages_per_block + * params->blocks_per_sector + * params->nr_sectors; + + debug("SF: Detected %s with page size %u, total %u bytes\n", + params->name, page_size, asf->flash.size); + + return &asf->flash; + +err: + free(asf); + return NULL; +} diff --git a/drivers/mtd/spi/spi_flash.c b/drivers/mtd/spi/spi_flash.c new file mode 100644 index 00000000000..6a3ec89f555 --- /dev/null +++ b/drivers/mtd/spi/spi_flash.c @@ -0,0 +1,172 @@ +/* + * SPI flash interface + * + * Copyright (C) 2008 Atmel Corporation + */ +#include <common.h> +#include <malloc.h> +#include <spi.h> +#include <spi_flash.h> + +#include "spi_flash_internal.h" + +int spi_flash_cmd(struct spi_slave *spi, u8 cmd, void *response, size_t len) +{ + unsigned long flags = SPI_XFER_BEGIN; + int ret; + + if (len == 0) + flags |= SPI_XFER_END; + + ret = spi_xfer(spi, 8, &cmd, NULL, flags); + if (ret) { + debug("SF: Failed to send command %02x: %d\n", cmd, ret); + return ret; + } + + if (len) { + ret = spi_xfer(spi, len * 8, NULL, response, SPI_XFER_END); + if (ret) + debug("SF: Failed to read response (%zu bytes): %d\n", + len, ret); + } + + return ret; +} + +int spi_flash_cmd_read(struct spi_slave *spi, const u8 *cmd, + size_t cmd_len, void *data, size_t data_len) +{ + unsigned long flags = SPI_XFER_BEGIN; + int ret; + + if (data_len == 0) + flags |= SPI_XFER_END; + + ret = spi_xfer(spi, cmd_len * 8, cmd, NULL, flags); + if (ret) { + debug("SF: Failed to send read command (%zu bytes): %d\n", + cmd_len, ret); + } else if (data_len != 0) { + ret = spi_xfer(spi, data_len * 8, NULL, data, SPI_XFER_END); + if (ret) + debug("SF: Failed to read %zu bytes of data: %d\n", + data_len, ret); + } + + return ret; +} + +int spi_flash_cmd_write(struct spi_slave *spi, const u8 *cmd, size_t cmd_len, + const void *data, size_t data_len) +{ + unsigned long flags = SPI_XFER_BEGIN; + int ret; + + if (data_len == 0) + flags |= SPI_XFER_END; + + ret = spi_xfer(spi, cmd_len * 8, cmd, NULL, flags); + if (ret) { + debug("SF: Failed to send read command (%zu bytes): %d\n", + cmd_len, ret); + } else if (data_len != 0) { + ret = spi_xfer(spi, data_len * 8, data, NULL, SPI_XFER_END); + if (ret) + debug("SF: Failed to read %zu bytes of data: %d\n", + data_len, ret); + } + + return ret; +} + + +int spi_flash_read_common(struct spi_flash *flash, const u8 *cmd, + size_t cmd_len, void *data, size_t data_len) +{ + struct spi_slave *spi = flash->spi; + int ret; + + spi_claim_bus(spi); + ret = spi_flash_cmd_read(spi, cmd, cmd_len, data, data_len); + spi_release_bus(spi); + + return ret; +} + +struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs, + unsigned int max_hz, unsigned int spi_mode) +{ + struct spi_slave *spi; + struct spi_flash *flash; + int ret; + u8 idcode[3]; + + spi = spi_setup_slave(bus, cs, max_hz, spi_mode); + if (!spi) { + debug("SF: Failed to set up slave\n"); + return NULL; + } + + ret = spi_claim_bus(spi); + if (ret) { + debug("SF: Failed to claim SPI bus: %d\n", ret); + goto err_claim_bus; + } + + /* Read the ID codes */ + ret = spi_flash_cmd(spi, CMD_READ_ID, &idcode, sizeof(idcode)); + if (ret) + goto err_read_id; + + debug("SF: Got idcode %02x %02x %02x\n", idcode[0], + idcode[1], idcode[2]); + + switch (idcode[0]) { +#ifdef CONFIG_SPI_FLASH_SPANSION + case 0x01: + flash = spi_flash_probe_spansion(spi, idcode); + break; +#endif +#ifdef CONFIG_SPI_FLASH_ATMEL + case 0x1F: + flash = spi_flash_probe_atmel(spi, idcode); + break; +#endif +#ifdef CONFIG_SPI_FLASH_WINBOND + case 0xef: + flash = spi_flash_probe_winbond(spi, idcode); + break; +#endif +#ifdef CONFIG_SPI_FLASH_STMICRO + case 0x00: + case 0xff: + flash = spi_flash_probe_stmicro(spi, idcode); + break; +#endif + default: + debug("SF: Unsupported manufacturer %02X\n", idcode[0]); + flash = NULL; + break; + } + + if (!flash) + goto err_manufacturer_probe; + + spi_release_bus(spi); + + return flash; + +err_manufacturer_probe: +err_read_id: + spi_release_bus(spi); +err_claim_bus: + spi_free_slave(spi); + return NULL; +} + +void spi_flash_free(struct spi_flash *flash) +{ + spi_free_slave(flash->spi); + free(flash); +} diff --git a/drivers/mtd/spi/spi_flash_internal.h b/drivers/mtd/spi/spi_flash_internal.h new file mode 100644 index 00000000000..1eacb5c7487 --- /dev/null +++ b/drivers/mtd/spi/spi_flash_internal.h @@ -0,0 +1,47 @@ +/* + * SPI flash internal definitions + * + * Copyright (C) 2008 Atmel Corporation + */ + +/* Common parameters */ +#define SPI_FLASH_PROG_TIMEOUT ((10 * CFG_HZ) / 1000) +#define SPI_FLASH_PAGE_ERASE_TIMEOUT ((50 * CFG_HZ) / 1000) +#define SPI_FLASH_SECTOR_ERASE_TIMEOUT (10 * CFG_HZ) + +/* Common commands */ +#define CMD_READ_ID 0x9f + +#define CMD_READ_ARRAY_SLOW 0x03 +#define CMD_READ_ARRAY_FAST 0x0b +#define CMD_READ_ARRAY_LEGACY 0xe8 + +/* Send a single-byte command to the device and read the response */ +int spi_flash_cmd(struct spi_slave *spi, u8 cmd, void *response, size_t len); + +/* + * Send a multi-byte command to the device and read the response. Used + * for flash array reads, etc. + */ +int spi_flash_cmd_read(struct spi_slave *spi, const u8 *cmd, + size_t cmd_len, void *data, size_t data_len); + +/* + * Send a multi-byte command to the device followed by (optional) + * data. Used for programming the flash array, etc. + */ +int spi_flash_cmd_write(struct spi_slave *spi, const u8 *cmd, size_t cmd_len, + const void *data, size_t data_len); + +/* + * Same as spi_flash_cmd_read() except it also claims/releases the SPI + * bus. Used as common part of the ->read() operation. + */ +int spi_flash_read_common(struct spi_flash *flash, const u8 *cmd, + size_t cmd_len, void *data, size_t data_len); + +/* 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); +struct spi_flash *spi_flash_probe_winbond(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 00000000000..b8b835a3ffe --- /dev/null +++ b/drivers/mtd/spi/stmicro.c @@ -0,0 +1,356 @@ +/* + * (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 <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 * CONFIG_SYS_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; +} diff --git a/drivers/mtd/spi/winbond.c b/drivers/mtd/spi/winbond.c new file mode 100644 index 00000000000..5fa4ce056f1 --- /dev/null +++ b/drivers/mtd/spi/winbond.c @@ -0,0 +1,334 @@ +/* + * (C) Copyright 2000-2002 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * + * Copyright 2008, Texas Instrumemnts Inc. + * Modified to suppport Winbond flash. + * + * 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 <common.h> +#include <malloc.h> +#include <spi_flash.h> + +#include "spi_flash_internal.h" + +/* W25 specific commands. Derived from section 12.2 of + * http://www.winbond-usa.com/products/Nexflash/pdfs/datasheets/W25X16_32_64h.pdf + */ +#define CMD_W25_WREN 0x06 /* Write Enable */ +#define CMD_W25_WRDI 0x04 /* Write Disable */ +#define CMD_W25_RDSR 0x05 /* Read Status Register */ +#define CMD_W25_WRSR 0x01 /* Write Status Register */ +#define CMD_W25_READ 0x03 /* Read Data Bytes */ +#define CMD_W25_FAST_READ 0x0b /* Read Data Bytes at Higher Speed */ +#define CMD_W25_PP 0x02 /* Page Program */ +#define CMD_W25_SE 0x20 /* Sector Erase */ +#define CMD_W25_BE 0xd8 /* Bulk Erase */ +#define CMD_W25_DP 0xb9 /* Deep Power-down */ +#define CMD_W25_RES 0xab /* Release from DP, and Read Signature */ + +#define WINBOND_ID_W25X16 0x3015 +#define WINBOND_ID_W25X32 0x3016 +#define WINBOND_ID_W25X64 0x3017 + +#define WINBOND_SR_WIP (1 << 0) /* Write-in-Progress */ + +struct winbond_spi_flash_params { + u16 idcode; + u16 page_size; + u16 pages_per_sector; + u16 nr_sectors; + const char *name; +}; + +struct winbond_spi_flash { + const struct winbond_spi_flash_params *params; + struct spi_flash flash; +}; + +static inline struct winbond_spi_flash *to_winbond_spi_flash(struct spi_flash + *flash) +{ + return container_of(flash, struct winbond_spi_flash, flash); +} + +/* W25 specific flash parameters. Derived from chapter 1 of + * http://www.winbond-usa.com/products/Nexflash/pdfs/datasheets/W25X16_32_64h.pdf + */ +static const struct winbond_spi_flash_params winbond_spi_flash_table[] = { + { + .idcode = WINBOND_ID_W25X32, + .page_size = 256, + .pages_per_sector = 16, + .nr_sectors = 1024, + .name = "W25X32", + }, + { + .idcode = WINBOND_ID_W25X16, + .page_size = 256, + .pages_per_sector = 16, + .nr_sectors = 512, + .name = "W25X16", + }, + { + .idcode = WINBOND_ID_W25X64, + .page_size = 256, + .pages_per_sector = 16, + .nr_sectors = 2048, + .name = "W25X64", + }, + +}; + +static int winbond_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_W25_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 & WINBOND_SR_WIP) == 0) + break; + + } while (get_timer(timebase) < timeout); + + spi_xfer(spi, 0, NULL, NULL, SPI_XFER_END); + + if ((status & WINBOND_SR_WIP) == 0) + return 0; + + /* Timed out */ + return -1; +} + +static int winbond_read_fast(struct spi_flash *flash, + u32 offset, size_t len, void *buf) +{ + struct winbond_spi_flash *win = to_winbond_spi_flash(flash); + u8 cmd[5]; + int i, j; + + cmd[0] = CMD_READ_ARRAY_FAST; + for (i = 0, j = 1; i < 24; i += 8) + cmd[j++] = ((offset >> (16 - i)) & 0xFF); + cmd[4] = 0x00; + + return spi_flash_read_common(flash, cmd, sizeof(cmd), buf, len); +} + +static int winbond_write(struct spi_flash *flash, + u32 offset, size_t len, const void *buf) +{ + struct winbond_spi_flash *win = to_winbond_spi_flash(flash); + unsigned long page_addr; + unsigned long byte_addr; + unsigned long page_size; + size_t chunk_len; + size_t actual; + int ret, i, j; + u8 cmd[4]; + + page_size = win->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_W25_PP; + for (i = 0, j = 1; i < 24; i += 8) + cmd[j++] = ((offset >> (16 - i)) & 0xFF); + + 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_W25_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: Winbond Page Program failed\n"); + break; + } + + ret = winbond_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT); + if (ret < 0) { + debug("SF: Winbond page programming timed out\n"); + break; + } + + page_addr++; + offset += chunk_len; + byte_addr = 0; + } + + debug("SF: Winbond: Successfully programmed %u bytes @ 0x%x\n", + len, offset); + + spi_release_bus(flash->spi); + return ret; +} + +int winbond_erase(struct spi_flash *flash, u32 offset, size_t len) +{ + struct winbond_spi_flash *win = to_winbond_spi_flash(flash); + unsigned long sector_size; + size_t actual; + int ret, i , j; + u8 cmd[4]; + + /* + * This function currently uses sector erase only. + * probably speed things up by using bulk erase + * when possible. + */ + + sector_size = win->params->page_size * win->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_W25_SE; + + 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++) { + + for (i = 0, j = 1; i < 24; i += 8) + cmd[j++] = ((offset >> (16 - i)) & 0xFF); + + debug + ("SE: cmd = { 0x%02x 0x%02x%02x%02x }\n", + cmd[0], cmd[1], cmd[2], cmd[3]); + + ret = spi_flash_cmd(flash->spi, CMD_W25_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: Winbond page erase failed\n"); + break; + } + + /* Up to 2 seconds */ + ret = winbond_wait_ready(flash, 2 * CFG_HZ); + if (ret < 0) { + debug("SF: Winbond page erase timed out\n"); + break; + } + + offset += sector_size; + } + + debug("SF: Winbond: Successfully erased %u bytes @ 0x%x\n", + len * sector_size, offset); + + spi_release_bus(flash->spi); + return ret; +} + +struct spi_flash *spi_flash_probe_winbond(struct spi_slave *spi, u8 * idcode) +{ + const struct winbond_spi_flash_params *params; + struct winbond_spi_flash *win; + unsigned int i; + int ret; + u8 id[3]; + u16 idmatch = ((idcode[1] << 8) | idcode[2]); + + ret = spi_flash_cmd(spi, CMD_READ_ID, id, sizeof(id)); + if (ret) + return NULL; + + for (i = 0; i < ARRAY_SIZE(winbond_spi_flash_table); i++) { + params = &winbond_spi_flash_table[i]; + if (params->idcode == idmatch) + break; + } + + if (i == ARRAY_SIZE(winbond_spi_flash_table)) { + debug("SF: Unsupported Winbond ID %02x\n", idmatch); + return NULL; + } + + win = malloc(sizeof(struct winbond_spi_flash)); + if (!win) { + debug("SF: Failed to allocate memory\n"); + return NULL; + } + + win->params = params; + win->flash.spi = spi; + win->flash.name = params->name; + + win->flash.write = winbond_write; + win->flash.erase = winbond_erase; + win->flash.read = winbond_read_fast; + win->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, win->flash.size); + + return &win->flash; +} |