| /* |
| * (C) Copyright 2010, ucRobotics Inc. |
| * Copyright (c) 2014, Sage Electronic Engineering, LLC |
| * . |
| * Author: Chong Huang <chuang@ucrobotics.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" |
| |
| /* EN25*-specific commands */ |
| #define CMD_EN25_WREN 0x06 /* Write Enable */ |
| #define CMD_EN25_WRDI 0x04 /* Write Disable */ |
| #define CMD_EN25_RDSR 0x05 /* Read Status Register */ |
| #define CMD_EN25_WRSR 0x01 /* Write Status Register */ |
| #define CMD_EN25_READ 0x03 /* Read Data Bytes */ |
| #define CMD_EN25_FAST_READ 0x0b /* Read Data Bytes at Higher Speed */ |
| #define CMD_EN25_PP 0x02 /* Page Program */ |
| #define CMD_EN25_SE 0x20 /* Sector Erase */ |
| #define CMD_EN25_BE 0xd8 /* Block Erase */ |
| #define CMD_EN25_DP 0xb9 /* Deep Power-down */ |
| #define CMD_EN25_RES 0xab /* Release from DP, and Read Signature */ |
| |
| #define EON_ID_EN25Q128 0x3018 |
| #define EON_ID_EN25Q64 0x3017 |
| #define EON_ID_EN25S64 0x3817 |
| |
| struct eon_spi_flash_params { |
| u16 id; |
| u16 page_size; |
| u16 pages_per_sector; |
| u16 sectors_per_block; |
| u16 nr_sectors; |
| const char *name; |
| }; |
| |
| /* spi_flash needs to be first so upper layers can free() it */ |
| struct eon_spi_flash { |
| struct spi_flash flash; |
| const struct eon_spi_flash_params *params; |
| }; |
| |
| static inline |
| struct eon_spi_flash *to_eon_spi_flash(const struct spi_flash *flash) |
| { |
| return container_of(flash, struct eon_spi_flash, flash); |
| } |
| |
| static const struct eon_spi_flash_params eon_spi_flash_table[] = { |
| { |
| .id = EON_ID_EN25Q128, |
| .page_size = 256, |
| .pages_per_sector = 16, |
| .sectors_per_block = 16, |
| .nr_sectors = 4096, |
| .name = "EN25Q128", |
| }, |
| { |
| .id = EON_ID_EN25Q64, |
| .page_size = 256, |
| .pages_per_sector = 16, |
| .sectors_per_block = 16, |
| .nr_sectors = 2048, |
| .name = "EN25Q64", |
| }, |
| { |
| .id = EON_ID_EN25S64, |
| .page_size = 256, |
| .pages_per_sector = 16, |
| .sectors_per_block = 16, |
| .nr_sectors = 2048, |
| .name = "EN25S64", |
| }, |
| }; |
| |
| static int eon_write(const struct spi_flash *flash, |
| u32 offset, size_t len, const void *buf) |
| { |
| struct eon_spi_flash *eon = to_eon_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 << eon->params->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(sizeof(cmd), chunk_len); |
| |
| ret = spi_flash_cmd(&flash->spi, CMD_EN25_WREN, NULL, 0); |
| if (ret < 0) { |
| printk(BIOS_WARNING, "SF: Enabling Write failed\n"); |
| goto out; |
| } |
| |
| cmd[0] = CMD_EN25_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_write(&flash->spi, cmd, sizeof(cmd), |
| buf + actual, chunk_len); |
| if (ret < 0) { |
| printk(BIOS_WARNING, "SF: EON Page Program failed\n"); |
| goto out; |
| } |
| |
| ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT); |
| if (ret) { |
| printk(BIOS_WARNING, "SF: EON Page Program timeout\n"); |
| goto out; |
| } |
| |
| offset += chunk_len; |
| } |
| |
| #if CONFIG_DEBUG_SPI_FLASH |
| printk(BIOS_SPEW, "SF: EON: Successfully programmed %zu bytes @ %#x\n", |
| len, (unsigned int)(offset - len)); |
| #endif |
| |
| out: |
| return ret; |
| } |
| |
| struct spi_flash *spi_flash_probe_eon(struct spi_slave *spi, u8 *idcode) |
| { |
| const struct eon_spi_flash_params *params; |
| struct eon_spi_flash *eon; |
| unsigned int i; |
| |
| for (i = 0; i < ARRAY_SIZE(eon_spi_flash_table); ++i) { |
| params = &eon_spi_flash_table[i]; |
| if (params->id == ((idcode[1] << 8) | idcode[2])) |
| break; |
| } |
| |
| if (i == ARRAY_SIZE(eon_spi_flash_table)) { |
| printk(BIOS_WARNING, "SF: Unsupported EON ID %#02x%02x\n", |
| idcode[1], idcode[2]); |
| return NULL; |
| } |
| |
| eon = malloc(sizeof(*eon)); |
| if (!eon) { |
| printk(BIOS_WARNING, "SF: Failed to allocate memory\n"); |
| return NULL; |
| } |
| |
| eon->params = params; |
| memcpy(&eon->flash.spi, spi, sizeof(*spi)); |
| eon->flash.name = params->name; |
| |
| eon->flash.internal_write = eon_write; |
| eon->flash.internal_erase = spi_flash_cmd_erase; |
| eon->flash.internal_status = spi_flash_cmd_status; |
| eon->flash.internal_read = spi_flash_cmd_read_fast; |
| eon->flash.sector_size = params->page_size * params->pages_per_sector; |
| eon->flash.size = params->page_size * params->pages_per_sector |
| * params->nr_sectors; |
| eon->flash.erase_cmd = CMD_EN25_SE; |
| eon->flash.status_cmd = CMD_EN25_RDSR; |
| |
| return &eon->flash; |
| } |