2 * This file is part of the flashrom project.
4 * Copyright (C) 2007 Markus Boas <ryven@ryven.de>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
24 int probe_w29ee011(struct flashchip *flash)
26 volatile uint8_t *bios = flash->virtual_memory;
28 extern char *chip_to_probe;
30 if (!chip_to_probe || strcmp(chip_to_probe, "W29EE011")) {
31 printf_debug("\n===\n");
32 printf_debug(" Probing disabled for Winbond W29EE011 because the probing sequence puts the\n");
33 printf_debug(" AMIC A49LF040A in a funky state.\n");
34 printf_debug(" Use 'flashrom -c W29EE011' if you have a board with this chip.");
35 printf_debug("\n===\n");
39 /* Issue JEDEC Product ID Entry command */
40 *(volatile uint8_t *)(bios + 0x5555) = 0xAA;
42 *(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
44 *(volatile uint8_t *)(bios + 0x5555) = 0x80;
46 *(volatile uint8_t *)(bios + 0x5555) = 0xAA;
48 *(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
50 *(volatile uint8_t *)(bios + 0x5555) = 0x60;
54 id1 = *(volatile uint8_t *)bios;
55 id2 = *(volatile uint8_t *)(bios + 0x01);
57 /* Issue JEDEC Product ID Exit command */
58 *(volatile uint8_t *)(bios + 0x5555) = 0xAA;
60 *(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
62 *(volatile uint8_t *)(bios + 0x5555) = 0xF0;
65 printf_debug("%s: id1 0x%02x, id2 0x%02x\n", __FUNCTION__, id1, id2);
67 if (id1 == flash->manufacture_id && id2 == flash->model_id)