| /* |
| * (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; |
| }; |
| |
| /* spi_flash needs to be first so upper layers can free() it */ |
| struct stmicro_spi_flash { |
| struct spi_flash flash; |
| const struct stmicro_spi_flash_params *params; |
| }; |
| |
| 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 cmd = CMD_M25PXX_RDSR; |
| u8 status; |
| |
| ret = spi_xfer(spi, 8, &cmd, 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 >> 16; |
| offset += sector_size; |
| |
| 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; |
| } |
| |
| ret = stmicro_wait_ready(flash, SPI_FLASH_PAGE_ERASE_TIMEOUT); |
| 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; |
| |
| 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", idcode[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; |
| } |