/* * (C) Copyright 2000-2002 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. * * Copyright 2008, Network Appliance Inc. * Jason McMullan * * 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 #include #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_SSE 0x20 /* Subsector Erase */ #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 */ /* * Device ID = (memory_type << 8) + memory_capacity */ #define STM_ID_M25P10 0x2011 #define STM_ID_M25P16 0x2015 #define STM_ID_M25P20 0x2012 #define STM_ID_M25P32 0x2016 #define STM_ID_M25P40 0x2013 #define STM_ID_M25P64 0x2017 #define STM_ID_M25P80 0x2014 #define STM_ID_M25P128 0x2018 #define STM_ID_N25Q256A 0xba19 #define STM_ID_N25Q128 0xbb18 /* Some SPI flash share the same .idcode1 (idcode[2]). To handle this without * (possibly) breaking existing implementations, add the new device at the top * of the flash table array and set its .idcode1 = STM_ID_USE_ALT_ID. The .id * is then (idcode[1] << 8 | idcode[2]). */ struct stmicro_spi_flash_params { u16 device_id; u8 op_erase; 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[] = { { .device_id = STM_ID_N25Q128, .op_erase = CMD_M25PXX_SSE, .page_size = 256, .pages_per_sector = 16, .nr_sectors = 4096, .name = "N25Q128", }, { .device_id = STM_ID_M25P10, .op_erase = CMD_M25PXX_SE, .page_size = 256, .pages_per_sector = 128, .nr_sectors = 4, .name = "M25P10", }, { .device_id = STM_ID_M25P16, .op_erase = CMD_M25PXX_SE, .page_size = 256, .pages_per_sector = 256, .nr_sectors = 32, .name = "M25P16", }, { .device_id = STM_ID_M25P20, .op_erase = CMD_M25PXX_SE, .page_size = 256, .pages_per_sector = 256, .nr_sectors = 4, .name = "M25P20", }, { .device_id = STM_ID_M25P32, .op_erase = CMD_M25PXX_SE, .page_size = 256, .pages_per_sector = 256, .nr_sectors = 64, .name = "M25P32", }, { .device_id = STM_ID_M25P40, .op_erase = CMD_M25PXX_SE, .page_size = 256, .pages_per_sector = 256, .nr_sectors = 8, .name = "M25P40", }, { .device_id = STM_ID_M25P64, .op_erase = CMD_M25PXX_SE, .page_size = 256, .pages_per_sector = 256, .nr_sectors = 128, .name = "M25P64", }, { .device_id = STM_ID_M25P80, .op_erase = CMD_M25PXX_SE, .page_size = 256, .pages_per_sector = 256, .nr_sectors = 16, .name = "M25P80", }, { .device_id = STM_ID_M25P128, .op_erase = CMD_M25PXX_SE, .page_size = 256, .pages_per_sector = 1024, .nr_sectors = 64, .name = "M25P128", }, { .device_id = STM_ID_N25Q256A, .page_size = 256, .pages_per_sector = 256, .nr_sectors = 512, .name = "N25Q256A", }, }; 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 byte_addr; unsigned long page_size; size_t chunk_len; size_t actual; int ret = 0; u8 cmd[4]; page_size = stm->params->page_size; byte_addr = offset % page_size; flash->spi->rw = SPI_WRITE_FLAG; for (actual = 0; actual < len; actual += chunk_len) { chunk_len = min(len - actual, page_size - byte_addr); chunk_len = spi_crop_chunk(sizeof(cmd), chunk_len); cmd[0] = CMD_M25PXX_PP; cmd[1] = (offset >> 16) & 0xff; cmd[2] = (offset >> 8) & 0xff; cmd[3] = offset & 0xff; #if CONFIG_DEBUG_SPI_FLASH printk(BIOS_SPEW, "PP: 0x%p => cmd = { 0x%02x 0x%02x%02x%02x }" " chunk_len = %zu\n", buf + actual, cmd[0], cmd[1], cmd[2], cmd[3], chunk_len); #endif ret = spi_flash_cmd(flash->spi, CMD_M25PXX_WREN, NULL, 0); if (ret < 0) { printk(BIOS_WARNING, "SF: Enabling Write failed\n"); goto out; } ret = spi_flash_cmd_write(flash->spi, cmd, sizeof(cmd), buf + actual, chunk_len); if (ret < 0) { printk(BIOS_WARNING, "SF: STMicro Page Program failed\n"); goto out; } ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT); if (ret) goto out; offset += chunk_len; byte_addr = 0; } #if CONFIG_DEBUG_SPI_FLASH printk(BIOS_SPEW, "SF: STMicro: Successfully programmed %zu bytes @" " 0x%lx\n", len, (unsigned long)(offset - len)); #endif ret = 0; out: spi_release_bus(flash->spi); return ret; } static struct stmicro_spi_flash stm; struct spi_flash *spi_flash_probe_stmicro(struct spi_slave *spi, u8 * idcode) { const struct stmicro_spi_flash_params *params; 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->device_id == (idcode[1] << 8 | idcode[2])) { break; } } if (i == ARRAY_SIZE(stmicro_spi_flash_table)) { printk(BIOS_WARNING, "SF: Unsupported STMicro ID %02x%02x\n", idcode[1], idcode[2]); return NULL; } stm.params = params; stm.flash.spi = spi; stm.flash.name = params->name; stm.flash.write = stmicro_write; stm.flash.erase = spi_flash_cmd_erase; stm.flash.read = spi_flash_cmd_read_fast; stm.flash.sector_size = params->page_size * params->pages_per_sector; stm.flash.size = stm.flash.sector_size * params->nr_sectors; stm.flash.erase_cmd = params->op_erase; return &stm.flash; }