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
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
33 // I need that Berkeley bit-map printer
34 void print_82802ab_status(uint8_t status)
36 printf("%s", status & 0x80 ? "Ready:" : "Busy:");
37 printf("%s", status & 0x40 ? "BE SUSPEND:" : "BE RUN/FINISH:");
38 printf("%s", status & 0x20 ? "BE ERROR:" : "BE OK:");
39 printf("%s", status & 0x10 ? "PROG ERR:" : "PROG OK:");
40 printf("%s", status & 0x8 ? "VP ERR:" : "VPP OK:");
41 printf("%s", status & 0x4 ? "PROG SUSPEND:" : "PROG RUN/FINISH:");
42 printf("%s", status & 0x2 ? "WP|TBL#|WP#,ABORT:" : "UNLOCK:");
45 int probe_82802ab(struct flashchip *flash)
47 volatile uint8_t *bios = flash->virtual_memory;
51 *(volatile uint8_t *)(bios + 0x5555) = 0xAA;
52 *(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
53 *(volatile uint8_t *)(bios + 0x5555) = 0x90;
61 id1 = *(volatile uint8_t *)bios;
62 id2 = *(volatile uint8_t *)(bios + 0x01);
65 *(volatile uint8_t *)(bios + 0x5555) = 0xAA;
66 *(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
67 *(volatile uint8_t *)(bios + 0x5555) = 0xF0;
71 printf_debug("%s: id1 0x%x, id2 0x%x\n", __FUNCTION__, id1, id2);
73 if (id1 != flash->manufacture_id || id2 != flash->model_id)
76 map_flash_registers(flash);
81 uint8_t wait_82802ab(volatile uint8_t *bios)
87 if ((*bios & 0x80) == 0) { // it's busy
88 while ((*bios & 0x80) == 0) ;
93 // put another command to get out of status register mode
98 id1 = *(volatile uint8_t *)bios;
99 id2 = *(volatile uint8_t *)(bios + 0x01);
101 // this is needed to jam it out of "read id" mode
102 *(volatile uint8_t *)(bios + 0x5555) = 0xAA;
103 *(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
104 *(volatile uint8_t *)(bios + 0x5555) = 0xF0;
109 int erase_82802ab_block(struct flashchip *flash, int offset)
111 volatile uint8_t *bios = flash->virtual_memory + offset;
112 volatile uint8_t *wrprotect = flash->virtual_registers + offset + 2;
115 // clear status register
117 //printf("Erase at %p\n", bios);
118 // clear write protect
119 //printf("write protect is at %p\n", (wrprotect));
120 //printf("write protect is 0x%x\n", *(wrprotect));
122 //printf("write protect is 0x%x\n", *(wrprotect));
125 *(volatile uint8_t *)(bios) = 0x20;
126 *(volatile uint8_t *)(bios) = 0xd0;
128 // now let's see what the register is
129 status = wait_82802ab(flash->virtual_memory);
130 //print_82802ab_status(status);
131 printf("DONE BLOCK 0x%x\n", offset);
136 int erase_82802ab(struct flashchip *flash)
139 unsigned int total_size = flash->total_size * 1024;
141 printf("total_size is %d; flash->page_size is %d\n",
142 total_size, flash->page_size);
143 for (i = 0; i < total_size; i += flash->page_size)
144 erase_82802ab_block(flash, i);
145 printf("DONE ERASE\n");
150 void write_page_82802ab(volatile uint8_t *bios, uint8_t *src,
151 volatile uint8_t *dst, int page_size)
155 for (i = 0; i < page_size; i++) {
156 /* transfer data from source to destination */
163 int write_82802ab(struct flashchip *flash, uint8_t *buf)
166 int total_size = flash->total_size * 1024;
167 int page_size = flash->page_size;
168 volatile uint8_t *bios = flash->virtual_memory;
170 erase_82802ab(flash);
172 printf("ERASE FAILED\n");
175 printf("Programming Page: ");
176 for (i = 0; i < total_size / page_size; i++) {
177 printf("%04d at address: 0x%08x", i, i * page_size);
178 write_page_82802ab(bios, buf + i * page_size,
179 bios + i * page_size, page_size);
180 printf("\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");