/* * (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_M25P10 0x11 #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_M25P10, .page_size = 256, .pages_per_sector = 128, .nr_sectors = 4, .name = "M25P10", }, { .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; if (idcode[0] == 0xff) { i = spi_flash_cmd(spi, CMD_M25PXX_RES, idcode, 4); if (i) return NULL; if ((idcode[3] & 0xf0) == 0x10) { idcode[0] = 0x20; idcode[1] = 0x20; idcode[2] = idcode[3] + 1; } else 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", 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; printf("SF: Detected %s with page size %u, total ", params->name, params->page_size); print_size(stm->flash.size, "\n"); return &stm->flash; }