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/*
* 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 */
static const struct spi_flash_part_id flash_table[] = {
{
.id = 0x4218,
.name = "AT25SL128A",
.nr_sectors_shift = 12,
.sector_size_kib_shift = 2,
},
{
.id = 0x4501,
.name = "AT25DF081A", /* Yes, 81A id < 81 */
.nr_sectors_shift = 8,
.sector_size_kib_shift = 2,
},
{
.id = 0x4502,
.name = "AT25DF081",
.nr_sectors_shift = 8,
.sector_size_kib_shift = 2,
},
{
.id = 0x4602,
.name = "AT25DF161",
.nr_sectors_shift = 9,
.sector_size_kib_shift = 2,
},
{
.id = 0x4603,
.name = "AT25DL161",
.nr_sectors_shift = 9,
.sector_size_kib_shift = 2,
},
{
.id = 0x4700,
.name = "AT25DF321",
.nr_sectors_shift = 10,
.sector_size_kib_shift = 2,
},
{
.id = 0x4701,
.name = "AT25DF321A",
.nr_sectors_shift = 10,
.sector_size_kib_shift = 2,
},
{
.id = 0x4800,
.name = "AT25DF641",
.nr_sectors_shift = 11,
.sector_size_kib_shift = 2,
},
{
.id = 0x8501,
.name = "AT25SF081",
.nr_sectors_shift = 8,
.sector_size_kib_shift = 2,
},
{
.id = 0x8600,
.name = "AT25DQ161",
.nr_sectors_shift = 9,
.sector_size_kib_shift = 2,
},
{
.id = 0x8601,
.name = "AT25SF161",
.nr_sectors_shift = 9,
.sector_size_kib_shift = 2,
},
{
.id = 0x8700,
.name = "AT25DQ321",
.nr_sectors_shift = 10,
.sector_size_kib_shift = 2,
},
};
static const struct spi_flash_ops spi_flash_ops = {
.read = spi_flash_cmd_read,
.write = spi_flash_cmd_write_page_program,
.erase = spi_flash_cmd_erase,
.status = spi_flash_cmd_status,
};
int spi_flash_probe_adesto(const struct spi_slave *spi, u8 *idcode,
struct spi_flash *flash)
{
const struct spi_flash_part_id *params;
unsigned int i;
for (i = 0; i < ARRAY_SIZE(flash_table); i++) {
params = &flash_table[i];
if (params->id == ((idcode[1] << 8) | idcode[2]))
break;
}
if (i == ARRAY_SIZE(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 = 256;
flash->sector_size = (1U << params->sector_size_kib_shift) * KiB;
flash->size = flash->sector_size * (1U << params->nr_sectors_shift);
flash->erase_cmd = CMD_AT25DF_SE;
flash->status_cmd = CMD_AT25DF_RDSR;
flash->pp_cmd = CMD_AT25DF_PP;
flash->wren_cmd = CMD_AT25DF_WREN;
flash->ops = &spi_flash_ops;
return 0;
}
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