2 * This file is part of the flashrom project.
4 * Copyright (C) 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
23 * - Name: Intel 82802AB/82802AC Firmware Hub (FWH)
24 * - URL: http://www.intel.com/design/chipsets/datashts/290658.htm
25 * - PDF: http://download.intel.com/design/chipsets/datashts/29065804.pdf
26 * - Order number: 290658-004
34 // I need that Berkeley bit-map printer
35 void print_82802ab_status(uint8_t status)
37 printf("%s", status & 0x80 ? "Ready:" : "Busy:");
38 printf("%s", status & 0x40 ? "BE SUSPEND:" : "BE RUN/FINISH:");
39 printf("%s", status & 0x20 ? "BE ERROR:" : "BE OK:");
40 printf("%s", status & 0x10 ? "PROG ERR:" : "PROG OK:");
41 printf("%s", status & 0x8 ? "VP ERR:" : "VPP OK:");
42 printf("%s", status & 0x4 ? "PROG SUSPEND:" : "PROG RUN/FINISH:");
43 printf("%s", status & 0x2 ? "WP|TBL#|WP#,ABORT:" : "UNLOCK:");
46 int probe_82802ab(struct flashchip *flash)
48 volatile uint8_t *bios = flash->virtual_memory;
52 *(volatile uint8_t *)(bios + 0x5555) = 0xAA;
53 *(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
54 *(volatile uint8_t *)(bios + 0x5555) = 0x90;
62 id1 = *(volatile uint8_t *)bios;
63 id2 = *(volatile uint8_t *)(bios + 0x01);
66 *(volatile uint8_t *)(bios + 0x5555) = 0xAA;
67 *(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
68 *(volatile uint8_t *)(bios + 0x5555) = 0xF0;
72 printf_debug("%s: id1 0x%02x, id2 0x%02x\n", __FUNCTION__, id1, id2);
74 if (id1 != flash->manufacture_id || id2 != flash->model_id)
77 map_flash_registers(flash);
82 uint8_t wait_82802ab(volatile uint8_t *bios)
88 if ((*bios & 0x80) == 0) { // it's busy
89 while ((*bios & 0x80) == 0) ;
94 // put another command to get out of status register mode
99 id1 = *(volatile uint8_t *)bios;
100 id2 = *(volatile uint8_t *)(bios + 0x01);
102 // this is needed to jam it out of "read id" mode
103 *(volatile uint8_t *)(bios + 0x5555) = 0xAA;
104 *(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
105 *(volatile uint8_t *)(bios + 0x5555) = 0xF0;
110 int erase_82802ab_block(struct flashchip *flash, int offset)
112 volatile uint8_t *bios = flash->virtual_memory + offset;
113 volatile uint8_t *wrprotect = flash->virtual_registers + offset + 2;
117 // clear status register
119 //printf("Erase at %p\n", bios);
120 // clear write protect
121 //printf("write protect is at %p\n", (wrprotect));
122 //printf("write protect is 0x%x\n", *(wrprotect));
124 //printf("write protect is 0x%x\n", *(wrprotect));
127 *(volatile uint8_t *)(bios) = 0x20;
128 *(volatile uint8_t *)(bios) = 0xd0;
130 // now let's see what the register is
131 status = wait_82802ab(flash->virtual_memory);
132 //print_82802ab_status(status);
133 for (j = 0; j < flash->page_size; j++) {
134 if (*(bios + j) != 0xFF) {
135 printf("BLOCK ERASE failed at 0x%x\n", offset);
139 printf("DONE BLOCK 0x%x\n", offset);
144 int erase_82802ab(struct flashchip *flash)
147 unsigned int total_size = flash->total_size * 1024;
149 printf("total_size is %d; flash->page_size is %d\n",
150 total_size, flash->page_size);
151 for (i = 0; i < total_size; i += flash->page_size)
152 erase_82802ab_block(flash, i);
153 printf("DONE ERASE\n");
158 void write_page_82802ab(volatile uint8_t *bios, uint8_t *src,
159 volatile uint8_t *dst, int page_size)
163 for (i = 0; i < page_size; i++) {
164 /* transfer data from source to destination */
171 int write_82802ab(struct flashchip *flash, uint8_t *buf)
174 int total_size = flash->total_size * 1024;
175 int page_size = flash->page_size;
176 volatile uint8_t *bios = flash->virtual_memory;
178 printf("Programming page: \n");
179 for (i = 0; i < total_size / page_size; i++) {
181 ("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b");
182 printf("%04d at address: 0x%08x", i, i * page_size);
184 /* Auto Skip Blocks, which already contain the desired data
185 * Faster, because we only write, what has changed
186 * More secure, because blocks, which are excluded
187 * (with the exclude or layout feature)
188 * or not erased and rewritten; their data is retained also in
189 * sudden power off situations
191 if (!memcmp((void *)(buf + i * page_size),
192 (void *)(bios + i * page_size), page_size)) {
197 /* erase block by block and write block by block; this is the most secure way */
198 erase_82802ab_block(flash, i * page_size);
199 write_page_82802ab(bios, buf + i * page_size,
200 bios + i * page_size, page_size);