| /* |
| * 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; |
| }; |
| |
| 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) |
| { |
| unsigned long byte_addr; |
| unsigned long page_size; |
| size_t chunk_len; |
| size_t actual; |
| int ret = 0; |
| u8 cmd[4]; |
| |
| page_size = flash->page_size; |
| |
| for (actual = 0; actual < len; actual += chunk_len) { |
| byte_addr = offset % page_size; |
| chunk_len = min(len - actual, page_size - byte_addr); |
| chunk_len = spi_crop_chunk(&flash->spi, sizeof(cmd), chunk_len); |
| |
| cmd[0] = CMD_W25_PP; |
| cmd[1] = (offset >> 16) & 0xff; |
| cmd[2] = (offset >> 8) & 0xff; |
| cmd[3] = offset & 0xff; |
| #if IS_ENABLED(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; |
| } |
| |
| #if IS_ENABLED(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 const struct spi_flash_ops spi_flash_ops = { |
| .write = winbond_write, |
| .erase = spi_flash_cmd_erase, |
| .status = spi_flash_cmd_status, |
| #if IS_ENABLED(CONFIG_SPI_FLASH_NO_FAST_READ) |
| .read = spi_flash_cmd_read_slow, |
| #else |
| .read = spi_flash_cmd_read_fast, |
| #endif |
| }; |
| |
| int spi_flash_probe_winbond(const struct spi_slave *spi, u8 *idcode, |
| struct spi_flash *flash) |
| { |
| const struct winbond_spi_flash_params *params; |
| 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 -1; |
| } |
| |
| memcpy(&flash->spi, spi, sizeof(*spi)); |
| flash->name = params->name; |
| /* Assuming power-of-two page size initially. */ |
| flash->page_size = 1 << params->l2_page_size; |
| flash->sector_size = flash->page_size * params->pages_per_sector; |
| flash->size = flash->sector_size * params->sectors_per_block * |
| params->nr_blocks; |
| flash->erase_cmd = CMD_W25_SE; |
| flash->status_cmd = CMD_W25_RDSR; |
| |
| flash->ops = &spi_flash_ops; |
| |
| return 0; |
| } |