| /* |
| * This file is part of the coreboot 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. |
| */ |
| |
| /* |
| * Driver for Adesto Technologies SPI flash |
| * based on winbond.c |
| */ |
| |
| #include <console/console.h> |
| #include <commonlib/helpers.h> |
| #include <string.h> |
| #include <spi_flash.h> |
| #include <spi-generic.h> |
| |
| #include "spi_flash_internal.h" |
| |
| /* at25dfxx-specific commands */ |
| #define CMD_AT25DF_WREN 0x06 /* Write Enable */ |
| #define CMD_AT25DF_WRDI 0x04 /* Write Disable */ |
| #define CMD_AT25DF_RDSR 0x05 /* Read Status Register */ |
| #define CMD_AT25DF_WRSR 0x01 /* Write Status Register */ |
| #define CMD_AT25DF_READ 0x03 /* Read Data Bytes */ |
| #define CMD_AT25DF_FAST_READ 0x0b /* Read Data Bytes at Higher Speed */ |
| #define CMD_AT25DF_PP 0x02 /* Page Program */ |
| #define CMD_AT25DF_SE 0x20 /* Sector (4K) Erase */ |
| #define CMD_AT25DF_BE 0xd8 /* Block (64K) Erase */ |
| #define CMD_AT25DF_CE 0xc7 /* Chip Erase */ |
| #define CMD_AT25DF_DP 0xb9 /* Deep Power-down */ |
| #define CMD_AT25DF_RES 0xab /* Release from DP, and Read Signature */ |
| |
| struct adesto_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 adesto_spi_flash_params adesto_spi_flash_table[] = { |
| { |
| .id = 0x4218, |
| .l2_page_size = 8, |
| .pages_per_sector = 16, |
| .sectors_per_block = 16, |
| .nr_blocks = 256, |
| .name = "AT25SL128A", |
| }, |
| { |
| .id = 0x4501, |
| .l2_page_size = 8, |
| .pages_per_sector = 16, |
| .sectors_per_block = 16, |
| .nr_blocks = 16, |
| .name = "AT25DF081A", /* Yes, 81A id < 81 */ |
| }, |
| { |
| .id = 0x4502, |
| .l2_page_size = 8, |
| .pages_per_sector = 16, |
| .sectors_per_block = 16, |
| .nr_blocks = 16, |
| .name = "AT25DF081", |
| }, |
| { |
| .id = 0x4602, |
| .l2_page_size = 8, |
| .pages_per_sector = 16, |
| .sectors_per_block = 16, |
| .nr_blocks = 32, |
| .name = "AT25DF161", |
| }, |
| { |
| .id = 0x4603, |
| .l2_page_size = 8, |
| .pages_per_sector = 16, |
| .sectors_per_block = 16, |
| .nr_blocks = 32, |
| .name = "AT25DL161", |
| }, |
| { |
| .id = 0x4700, |
| .l2_page_size = 8, |
| .pages_per_sector = 16, |
| .sectors_per_block = 16, |
| .nr_blocks = 64, |
| .name = "AT25DF321", |
| }, |
| { |
| .id = 0x4701, |
| .l2_page_size = 8, |
| .pages_per_sector = 16, |
| .sectors_per_block = 16, |
| .nr_blocks = 64, |
| .name = "AT25DF321A", |
| }, |
| { |
| .id = 0x4800, |
| .l2_page_size = 8, |
| .pages_per_sector = 16, |
| .sectors_per_block = 16, |
| .nr_blocks = 128, |
| .name = "AT25DF641", |
| }, |
| { |
| .id = 0x8501, |
| .l2_page_size = 8, |
| .pages_per_sector = 16, |
| .sectors_per_block = 16, |
| .nr_blocks = 16, |
| .name = "AT25SF081", |
| }, |
| { |
| .id = 0x8600, |
| .l2_page_size = 8, |
| .pages_per_sector = 16, |
| .sectors_per_block = 16, |
| .nr_blocks = 32, |
| .name = "AT25DQ161", |
| }, |
| { |
| .id = 0x8601, |
| .l2_page_size = 8, |
| .pages_per_sector = 16, |
| .sectors_per_block = 16, |
| .nr_blocks = 32, |
| .name = "AT25SF161", |
| }, |
| { |
| .id = 0x8700, |
| .l2_page_size = 8, |
| .pages_per_sector = 16, |
| .sectors_per_block = 16, |
| .nr_blocks = 64, |
| .name = "AT25DQ321", |
| }, |
| }; |
| |
| static const struct spi_flash_ops spi_flash_ops = { |
| .write = spi_flash_cmd_write_page_program, |
| .erase = spi_flash_cmd_erase, |
| }; |
| |
| int spi_flash_probe_adesto(const struct spi_slave *spi, u8 *idcode, |
| struct spi_flash *flash) |
| { |
| const struct adesto_spi_flash_params *params; |
| unsigned int i; |
| |
| for (i = 0; i < ARRAY_SIZE(adesto_spi_flash_table); i++) { |
| params = &adesto_spi_flash_table[i]; |
| if (params->id == ((idcode[1] << 8) | idcode[2])) |
| break; |
| } |
| |
| if (i == ARRAY_SIZE(adesto_spi_flash_table)) { |
| printk(BIOS_WARNING, "SF: Unsupported adesto 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_AT25DF_SE; |
| flash->pp_cmd = CMD_AT25DF_PP; |
| flash->wren_cmd = CMD_AT25DF_WREN; |
| |
| flash->ops = &spi_flash_ops; |
| |
| return 0; |
| } |