/* * Copyright 2008, Network Appliance Inc. * Author: Jason McMullan <mcmullan <at> netapp.com> * Licensed under the GPL-2 or later. */ #include <console/console.h> #include <stdlib.h> #include <spi_flash.h> #include <spi-generic.h> #include <string.h> #include "spi_flash_internal.h" /* M25Pxx-specific commands */ #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 (4K) Erase */ #define CMD_W25_BE 0xd8 /* Block (64K) Erase */ #define CMD_W25_CE 0xc7 /* Chip Erase */ #define CMD_W25_DP 0xb9 /* Deep Power-down */ #define CMD_W25_RES 0xab /* Release from DP, and Read Signature */ struct winbond_spi_flash_params { uint16_t id; /* Log2 of page size in power-of-two mode */ uint8_t l2_page_size; uint16_t pages_per_sector; uint16_t sectors_per_block; uint16_t nr_blocks; const char *name; }; /* spi_flash needs to be first so upper layers can free() it */ struct winbond_spi_flash { struct spi_flash flash; const struct winbond_spi_flash_params *params; }; static inline struct winbond_spi_flash * to_winbond_spi_flash(const struct spi_flash *flash) { return container_of(flash, struct winbond_spi_flash, flash); } static const struct winbond_spi_flash_params winbond_spi_flash_table[] = { { .id = 0x3015, .l2_page_size = 8, .pages_per_sector = 16, .sectors_per_block = 16, .nr_blocks = 32, .name = "W25X16", }, { .id = 0x3016, .l2_page_size = 8, .pages_per_sector = 16, .sectors_per_block = 16, .nr_blocks = 64, .name = "W25X32", }, { .id = 0x3017, .l2_page_size = 8, .pages_per_sector = 16, .sectors_per_block = 16, .nr_blocks = 128, .name = "W25X64", }, { .id = 0x4015, .l2_page_size = 8, .pages_per_sector = 16, .sectors_per_block = 16, .nr_blocks = 32, .name = "W25Q16", }, { .id = 0x4016, .l2_page_size = 8, .pages_per_sector = 16, .sectors_per_block = 16, .nr_blocks = 64, .name = "W25Q32", }, { .id = 0x6016, .l2_page_size = 8, .pages_per_sector = 16, .sectors_per_block = 16, .nr_blocks = 64, .name = "W25Q32DW", }, { .id = 0x4017, .l2_page_size = 8, .pages_per_sector = 16, .sectors_per_block = 16, .nr_blocks = 128, .name = "W25Q64", }, { .id = 0x6017, .l2_page_size = 8, .pages_per_sector = 16, .sectors_per_block = 16, .nr_blocks = 128, .name = "W25Q64DW", }, { .id = 0x4018, .l2_page_size = 8, .pages_per_sector = 16, .sectors_per_block = 16, .nr_blocks = 256, .name = "W25Q128", }, { .id = 0x6018, .l2_page_size = 8, .pages_per_sector = 16, .sectors_per_block = 16, .nr_blocks = 256, .name = "W25Q128FW", }, { .id = 0x4019, .l2_page_size = 8, .pages_per_sector = 16, .sectors_per_block = 16, .nr_blocks = 512, .name = "W25Q256", }, }; static int winbond_write(const struct spi_flash *flash, u32 offset, size_t len, const void *buf) { struct winbond_spi_flash *stm = to_winbond_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 = 1 << stm->params->l2_page_size; byte_addr = offset % page_size; 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_W25_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_W25_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: Winbond 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: Winbond: Successfully programmed %zu bytes @" " 0x%lx\n", len, (unsigned long)(offset - len)); #endif ret = 0; out: return ret; } static struct winbond_spi_flash stm; struct spi_flash *spi_flash_probe_winbond(struct spi_slave *spi, u8 *idcode) { const struct winbond_spi_flash_params *params; unsigned page_size; unsigned int i; for (i = 0; i < ARRAY_SIZE(winbond_spi_flash_table); i++) { params = &winbond_spi_flash_table[i]; if (params->id == ((idcode[1] << 8) | idcode[2])) break; } if (i == ARRAY_SIZE(winbond_spi_flash_table)) { printk(BIOS_WARNING, "SF: Unsupported Winbond ID %02x%02x\n", idcode[1], idcode[2]); return NULL; } stm.params = params; memcpy(&stm.flash.spi, spi, sizeof(*spi)); stm.flash.name = params->name; /* Assuming power-of-two page size initially. */ page_size = 1 << params->l2_page_size; stm.flash.internal_write = winbond_write; stm.flash.internal_erase = spi_flash_cmd_erase; stm.flash.internal_status = spi_flash_cmd_status; #if CONFIG_SPI_FLASH_NO_FAST_READ stm.flash.internal_read = spi_flash_cmd_read_slow; #else stm.flash.internal_read = spi_flash_cmd_read_fast; #endif stm.flash.sector_size = (1 << stm.params->l2_page_size) * stm.params->pages_per_sector; stm.flash.size = page_size * params->pages_per_sector * params->sectors_per_block * params->nr_blocks; stm.flash.erase_cmd = CMD_W25_SE; stm.flash.status_cmd = CMD_W25_RDSR; return &stm.flash; }