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/*
* This file is part of the flashrom project.
*
* Copyright (C) 2007 Markus Boas <ryven@ryven.de>
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <string.h>
#include "flash.h"
int probe_w29ee011(struct flashchip *flash)
{
volatile uint8_t *bios = flash->virtual_memory;
uint8_t id1, id2;
extern char *chip_to_probe;
if (!chip_to_probe || strcmp(chip_to_probe, "W29EE011")) {
printf_debug("\n===\n");
printf_debug(" Probing disabled for Winbond W29EE011 because the probing sequence puts the\n");
printf_debug(" AMIC A49LF040A in a funky state.\n");
printf_debug(" Use 'flashrom -c W29EE011' if you have a board with this chip.");
printf_debug("\n===\n");
return 0;
}
/* Issue JEDEC Product ID Entry command */
writeb(0xAA, bios + 0x5555);
myusec_delay(10);
writeb(0x55, bios + 0x2AAA);
myusec_delay(10);
writeb(0x80, bios + 0x5555);
myusec_delay(10);
writeb(0xAA, bios + 0x5555);
myusec_delay(10);
writeb(0x55, bios + 0x2AAA);
myusec_delay(10);
writeb(0x60, bios + 0x5555);
myusec_delay(10);
/* Read product ID */
id1 = readb(bios);
id2 = readb(bios + 0x01);
/* Issue JEDEC Product ID Exit command */
writeb(0xAA, bios + 0x5555);
myusec_delay(10);
writeb(0x55, bios + 0x2AAA);
myusec_delay(10);
writeb(0xF0, bios + 0x5555);
myusec_delay(10);
printf_debug("%s: id1 0x%02x, id2 0x%02x\n", __FUNCTION__, id1, id2);
if (id1 == flash->manufacture_id && id2 == flash->model_id)
return 1;
return 0;
}
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