| /* |
| * (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) |
| * |
| * 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. |
| */ |
| |
| #include <stdlib.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_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_N25Q256 0xba19 |
| #define STM_ID_N25Q064 0xbb17 |
| #define STM_ID_N25Q128 0xbb18 |
| |
| 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_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_N25Q064, |
| .op_erase = CMD_M25PXX_SSE, |
| .page_size = 256, |
| .pages_per_sector = 16, |
| .nr_sectors = 2048, |
| .name = "N25Q064", |
| }, |
| { |
| .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_N25Q256, |
| .op_erase = CMD_M25PXX_SSE, |
| .page_size = 256, |
| .pages_per_sector = 16, |
| .nr_sectors = 8192, |
| .name = "N25Q256", |
| }, |
| }; |
| |
| 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; |
| } |