2 * This file is part of the flashrom project.
4 * Copyright 2000 Silicon Integrated System Corporation
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
25 int probe_29f002(struct flashchip *flash)
27 volatile uint8_t *bios = flash->virtual_memory;
30 *(bios + 0x5555) = 0xAA;
31 *(bios + 0x2AAA) = 0x55;
32 *(bios + 0x5555) = 0x90;
34 id1 = *(volatile uint8_t *)bios;
35 id2 = *(volatile uint8_t *)(bios + 0x01);
41 printf_debug("%s: id1 0x%x, id2 0x%x\n", __FUNCTION__, id1, id2);
42 if (id1 == flash->manufacture_id && id2 == flash->model_id)
48 int erase_29f002(struct flashchip *flash)
50 volatile uint8_t *bios = flash->virtual_memory;
52 *(bios + 0x555) = 0xF0;
53 *(bios + 0x555) = 0xAA;
54 *(bios + 0x2AA) = 0x55;
55 *(bios + 0x555) = 0x80;
56 *(bios + 0x555) = 0xAA;
57 *(bios + 0x2AA) = 0x55;
58 *(bios + 0x555) = 0x10;
61 toggle_ready_jedec(bios);
63 // while ((*bios & 0x40) != 0x40)
67 toggle_ready_jedec(bios);
68 *(bios + 0x0ffff) = 0x30;
69 *(bios + 0x1ffff) = 0x30;
70 *(bios + 0x2ffff) = 0x30;
71 *(bios + 0x37fff) = 0x30;
72 *(bios + 0x39fff) = 0x30;
73 *(bios + 0x3bfff) = 0x30;
79 int write_29f002(struct flashchip *flash, uint8_t *buf)
82 int total_size = flash->total_size * 1024;
83 volatile uint8_t *bios = flash->virtual_memory;
84 volatile uint8_t *dst = bios;
91 printf("Programming Page: ");
92 for (i = 0; i < total_size; i++) {
93 /* write to the sector */
95 printf("address: 0x%08lx", (unsigned long)i);
96 *(bios + 0x5555) = 0xAA;
97 *(bios + 0x2AAA) = 0x55;
98 *(bios + 0x5555) = 0xA0;
101 /* wait for Toggle bit ready */
102 toggle_ready_jedec(dst);
104 if ((i & 0xfff) == 0)
105 printf("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b");