/* * (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 <stdlib.h> #include <spi_flash.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(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(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; 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); 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; byte_addr = 0; } #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; } static int eon_erase(struct spi_flash *flash, u32 offset, size_t len) { return spi_flash_cmd_erase(flash, CMD_EN25_SE, offset, len); } 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; eon->flash.spi = spi; eon->flash.name = params->name; eon->flash.write = eon_write; eon->flash.erase = eon_erase; eon->flash.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; return &eon->flash; }