blob: 7838c3d3c3eb67187ed2a80d5b76a276e0cb7f69 [file] [log] [blame]
/*
* This file is part of the flashrom project.
*
* Copyright (C) 2000 Silicon Integrated System Corporation
*
* 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 "flash.h"
int probe_29f002(struct flashchip *flash)
{
chipaddr bios = flash->virtual_memory;
uint8_t id1, id2;
chip_writeb(0xAA, bios + 0x5555);
chip_writeb(0x55, bios + 0x2AAA);
chip_writeb(0x90, bios + 0x5555);
id1 = chip_readb(bios);
id2 = chip_readb(bios + 0x01);
chip_writeb(0xF0, bios);
programmer_delay(10);
printf_debug("%s: id1 0x%02x, id2 0x%02x\n", __func__, id1, id2);
if (id1 == flash->manufacture_id && id2 == flash->model_id)
return 1;
return 0;
}
/* FIXME: Use erase_chip_jedec?
* erase_29f002 uses shorter addresses, sends F0 (exit ID mode) and
* and has a bigger delay before polling the toggle bit */
int erase_29f002(struct flashchip *flash)
{
chipaddr bios = flash->virtual_memory;
chip_writeb(0xF0, bios + 0x555);
chip_writeb(0xAA, bios + 0x555);
chip_writeb(0x55, bios + 0x2AA);
chip_writeb(0x80, bios + 0x555);
chip_writeb(0xAA, bios + 0x555);
chip_writeb(0x55, bios + 0x2AA);
chip_writeb(0x10, bios + 0x555);
programmer_delay(100);
toggle_ready_jedec(bios);
if (check_erased_range(flash, 0, flash->total_size * 1024)) {
fprintf(stderr, "ERASE FAILED!\n");
return -1;
}
return 0;
}