104 lines
2.6 KiB
C
104 lines
2.6 KiB
C
/*
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* (C) Copyright 2010, ucRobotics Inc.
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* Author: Chong Huang <chuang@ucrobotics.com>
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* Licensed under the GPL-2 or later.
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*/
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#include <common.h>
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#include <malloc.h>
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#include <spi_flash.h>
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#include "spi_flash_internal.h"
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/* EN25Q128-specific commands */
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#define CMD_EN25Q128_WREN 0x06 /* Write Enable */
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#define CMD_EN25Q128_WRDI 0x04 /* Write Disable */
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#define CMD_EN25Q128_RDSR 0x05 /* Read Status Register */
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#define CMD_EN25Q128_WRSR 0x01 /* Write Status Register */
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#define CMD_EN25Q128_READ 0x03 /* Read Data Bytes */
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#define CMD_EN25Q128_FAST_READ 0x0b /* Read Data Bytes at Higher Speed */
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#define CMD_EN25Q128_PP 0x02 /* Page Program */
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#define CMD_EN25Q128_SE 0x20 /* Sector Erase */
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#define CMD_EN25Q128_BE 0xd8 /* Block Erase */
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#define CMD_EN25Q128_DP 0xb9 /* Deep Power-down */
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#define CMD_EN25Q128_RES 0xab /* Release from DP, and Read Signature */
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struct eon_spi_flash_params {
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u8 idcode1;
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u16 page_size;
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u16 pages_per_sector;
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u16 sectors_per_block;
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u16 nr_sectors;
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const char *name;
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};
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static const struct eon_spi_flash_params eon_spi_flash_table[] = {
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{
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.idcode1 = 0x16,
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.page_size = 256,
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.pages_per_sector = 16,
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.sectors_per_block = 16,
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.nr_sectors = 1024,
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.name = "EN25Q32B",
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},
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{
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.idcode1 = 0x18,
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.page_size = 256,
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.pages_per_sector = 16,
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.sectors_per_block = 16,
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.nr_sectors = 4096,
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.name = "EN25Q128",
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},
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{
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.idcode1 = 0x16,
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.page_size = 256,
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.pages_per_sector = 16,
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.sectors_per_block = 16,
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.nr_sectors = 1024,
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.name = "EN25Q32B",
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},
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};
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static int eon_erase(struct spi_flash *flash, u32 offset, size_t len)
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{
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return spi_flash_cmd_erase(flash, CMD_EN25Q128_BE, offset, len);
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}
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struct spi_flash *spi_flash_probe_eon(struct spi_slave *spi, u8 *idcode)
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{
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const struct eon_spi_flash_params *params;
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struct spi_flash *flash;
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unsigned int i;
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for (i = 0; i < ARRAY_SIZE(eon_spi_flash_table); ++i) {
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params = &eon_spi_flash_table[i];
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if (params->idcode1 == idcode[2])
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break;
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}
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if (i == ARRAY_SIZE(eon_spi_flash_table)) {
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debug("SF: Unsupported EON ID %02x\n", idcode[1]);
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return NULL;
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}
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flash = malloc(sizeof(*flash));
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if (!flash) {
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debug("SF: Failed to allocate memory\n");
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return NULL;
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}
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flash->spi = spi;
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flash->name = params->name;
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flash->write = spi_flash_cmd_write_multi;
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flash->erase = eon_erase;
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flash->read = spi_flash_cmd_read_fast;
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flash->page_size = params->page_size;
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flash->sector_size = params->page_size * params->pages_per_sector
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* params->sectors_per_block;
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flash->size = params->page_size * params->pages_per_sector
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* params->nr_sectors;
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return flash;
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}
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