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Ronald G. Minnich56439422002-09-06 16:58:14 +00001/*
Uwe Hermannd1107642007-08-29 17:52:32 +00002 * This file is part of the flashrom project.
Ronald G. Minnich56439422002-09-06 16:58:14 +00003 *
4 * Copyright 2000 Silicon Integrated System Corporation
5 *
Uwe Hermannd1107642007-08-29 17:52:32 +00006 * 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.
Ronald G. Minnich56439422002-09-06 16:58:14 +000010 *
Uwe Hermannd1107642007-08-29 17:52:32 +000011 * 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.
Ronald G. Minnich56439422002-09-06 16:58:14 +000015 *
Uwe Hermannd1107642007-08-29 17:52:32 +000016 * 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
19 */
20
21/*
22 * Datasheet:
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
Ronald G. Minnich56439422002-09-06 16:58:14 +000027 */
28
Ronald G. Minnich56439422002-09-06 16:58:14 +000029#include <stdio.h>
Stefan Reinauer7ed78c82007-05-24 09:26:39 +000030#include <stdint.h>
Ronald G. Minnich56439422002-09-06 16:58:14 +000031#include "flash.h"
Ronald G. Minnich56439422002-09-06 16:58:14 +000032
33// I need that Berkeley bit-map printer
Ollie Lho184a4042005-11-26 21:55:36 +000034void print_82802ab_status(uint8_t status)
Ronald G. Minnich56439422002-09-06 16:58:14 +000035{
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:");
43}
44
Ollie Lho761bf1b2004-03-20 16:46:10 +000045int probe_82802ab(struct flashchip *flash)
Ronald G. Minnich56439422002-09-06 16:58:14 +000046{
Stefan Reinauerce532972007-05-23 17:20:56 +000047 volatile uint8_t *bios = flash->virtual_memory;
Ollie Lho184a4042005-11-26 21:55:36 +000048 uint8_t id1, id2;
Ronald G. Minnich56439422002-09-06 16:58:14 +000049
50#if 0
Uwe Hermanna7e05482007-05-09 10:17:44 +000051 *(volatile uint8_t *)(bios + 0x5555) = 0xAA;
52 *(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
53 *(volatile uint8_t *)(bios + 0x5555) = 0x90;
Ronald G. Minnich56439422002-09-06 16:58:14 +000054#endif
55
56 *bios = 0xff;
57 myusec_delay(10);
58 *bios = 0x90;
59 myusec_delay(10);
60
Uwe Hermanna7e05482007-05-09 10:17:44 +000061 id1 = *(volatile uint8_t *)bios;
62 id2 = *(volatile uint8_t *)(bios + 0x01);
Ronald G. Minnich56439422002-09-06 16:58:14 +000063
Stefan Reinauerce532972007-05-23 17:20:56 +000064 /* Leave ID mode */
Uwe Hermanna7e05482007-05-09 10:17:44 +000065 *(volatile uint8_t *)(bios + 0x5555) = 0xAA;
66 *(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
67 *(volatile uint8_t *)(bios + 0x5555) = 0xF0;
Ronald G. Minnich56439422002-09-06 16:58:14 +000068
Ronald G. Minnich56439422002-09-06 16:58:14 +000069 myusec_delay(10);
70
Ollie Lho184a4042005-11-26 21:55:36 +000071 printf_debug("%s: id1 0x%x, id2 0x%x\n", __FUNCTION__, id1, id2);
Ronald G. Minnichd4228fd2003-02-28 17:21:38 +000072
Stefan Reinauerff4f1972007-05-24 08:48:10 +000073 if (id1 != flash->manufacture_id || id2 != flash->model_id)
74 return 0;
Stefan Reinauerce532972007-05-23 17:20:56 +000075
Stefan Reinauerff4f1972007-05-24 08:48:10 +000076 map_flash_registers(flash);
Ronald G. Minnich56439422002-09-06 16:58:14 +000077
Stefan Reinauerff4f1972007-05-24 08:48:10 +000078 return 1;
Ronald G. Minnich56439422002-09-06 16:58:14 +000079}
80
Ollie Lho184a4042005-11-26 21:55:36 +000081uint8_t wait_82802ab(volatile uint8_t *bios)
Ronald G. Minnich56439422002-09-06 16:58:14 +000082{
Ollie Lho184a4042005-11-26 21:55:36 +000083 uint8_t status;
84 uint8_t id1, id2;
Ronald G. Minnich56439422002-09-06 16:58:14 +000085
86 *bios = 0x70;
Ollie Lho761bf1b2004-03-20 16:46:10 +000087 if ((*bios & 0x80) == 0) { // it's busy
Uwe Hermanna7e05482007-05-09 10:17:44 +000088 while ((*bios & 0x80) == 0) ;
Ronald G. Minnich56439422002-09-06 16:58:14 +000089 }
90
91 status = *bios;
92
93 // put another command to get out of status register mode
Ollie Lho761bf1b2004-03-20 16:46:10 +000094
Ronald G. Minnich56439422002-09-06 16:58:14 +000095 *bios = 0x90;
96 myusec_delay(10);
97
Uwe Hermanna7e05482007-05-09 10:17:44 +000098 id1 = *(volatile uint8_t *)bios;
99 id2 = *(volatile uint8_t *)(bios + 0x01);
Ollie Lho761bf1b2004-03-20 16:46:10 +0000100
Ronald G. Minnich56439422002-09-06 16:58:14 +0000101 // this is needed to jam it out of "read id" mode
Uwe Hermanna7e05482007-05-09 10:17:44 +0000102 *(volatile uint8_t *)(bios + 0x5555) = 0xAA;
103 *(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
104 *(volatile uint8_t *)(bios + 0x5555) = 0xF0;
Ollie Lho761bf1b2004-03-20 16:46:10 +0000105
Uwe Hermannffec5f32007-08-23 16:08:21 +0000106 return status;
Ronald G. Minnich56439422002-09-06 16:58:14 +0000107}
Uwe Hermannffec5f32007-08-23 16:08:21 +0000108
Ronald G. Minnich56439422002-09-06 16:58:14 +0000109int erase_82802ab_block(struct flashchip *flash, int offset)
110{
Stefan Reinauerce532972007-05-23 17:20:56 +0000111 volatile uint8_t *bios = flash->virtual_memory + offset;
112 volatile uint8_t *wrprotect = flash->virtual_registers + offset + 2;
Ollie Lho184a4042005-11-26 21:55:36 +0000113 uint8_t status;
Ronald G. Minnich56439422002-09-06 16:58:14 +0000114
115 // clear status register
116 *bios = 0x50;
Ronald G. Minnichd4228fd2003-02-28 17:21:38 +0000117 //printf("Erase at %p\n", bios);
Ronald G. Minnich56439422002-09-06 16:58:14 +0000118 // clear write protect
Ronald G. Minnichd4228fd2003-02-28 17:21:38 +0000119 //printf("write protect is at %p\n", (wrprotect));
120 //printf("write protect is 0x%x\n", *(wrprotect));
Ronald G. Minnich56439422002-09-06 16:58:14 +0000121 *(wrprotect) = 0;
Ronald G. Minnichd4228fd2003-02-28 17:21:38 +0000122 //printf("write protect is 0x%x\n", *(wrprotect));
Ronald G. Minnich56439422002-09-06 16:58:14 +0000123
124 // now start it
Uwe Hermanna7e05482007-05-09 10:17:44 +0000125 *(volatile uint8_t *)(bios) = 0x20;
126 *(volatile uint8_t *)(bios) = 0xd0;
Ronald G. Minnich56439422002-09-06 16:58:14 +0000127 myusec_delay(10);
128 // now let's see what the register is
Stefan Reinauerce532972007-05-23 17:20:56 +0000129 status = wait_82802ab(flash->virtual_memory);
Ronald G. Minnichd4228fd2003-02-28 17:21:38 +0000130 //print_82802ab_status(status);
Ronald G. Minnich56439422002-09-06 16:58:14 +0000131 printf("DONE BLOCK 0x%x\n", offset);
Uwe Hermannffec5f32007-08-23 16:08:21 +0000132
133 return 0;
Ronald G. Minnich56439422002-09-06 16:58:14 +0000134}
Uwe Hermannffec5f32007-08-23 16:08:21 +0000135
Ollie Lho761bf1b2004-03-20 16:46:10 +0000136int erase_82802ab(struct flashchip *flash)
Ronald G. Minnich56439422002-09-06 16:58:14 +0000137{
138 int i;
Ronald G. Minnich56439422002-09-06 16:58:14 +0000139 unsigned int total_size = flash->total_size * 1024;
140
Ollie Lho761bf1b2004-03-20 16:46:10 +0000141 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)
Ronald G. Minnich56439422002-09-06 16:58:14 +0000144 erase_82802ab_block(flash, i);
145 printf("DONE ERASE\n");
Uwe Hermannffec5f32007-08-23 16:08:21 +0000146
147 return 0;
Ronald G. Minnich56439422002-09-06 16:58:14 +0000148}
149
Uwe Hermanna7e05482007-05-09 10:17:44 +0000150void write_page_82802ab(volatile uint8_t *bios, uint8_t *src,
151 volatile uint8_t *dst, int page_size)
Ronald G. Minnich56439422002-09-06 16:58:14 +0000152{
153 int i;
Ronald G. Minnich56439422002-09-06 16:58:14 +0000154
Ollie Lho761bf1b2004-03-20 16:46:10 +0000155 for (i = 0; i < page_size; i++) {
156 /* transfer data from source to destination */
157 *dst = 0x40;
158 *dst++ = *src++;
159 wait_82802ab(bios);
160 }
Ollie Lho761bf1b2004-03-20 16:46:10 +0000161}
162
Ollie Lho184a4042005-11-26 21:55:36 +0000163int write_82802ab(struct flashchip *flash, uint8_t *buf)
Ollie Lho761bf1b2004-03-20 16:46:10 +0000164{
165 int i;
Uwe Hermanna7e05482007-05-09 10:17:44 +0000166 int total_size = flash->total_size * 1024;
167 int page_size = flash->page_size;
Stefan Reinauerce532972007-05-23 17:20:56 +0000168 volatile uint8_t *bios = flash->virtual_memory;
Ollie Lho761bf1b2004-03-20 16:46:10 +0000169
170 erase_82802ab(flash);
Ronald G. Minnich56439422002-09-06 16:58:14 +0000171 if (*bios != 0xff) {
172 printf("ERASE FAILED\n");
173 return -1;
174 }
Ollie Lho761bf1b2004-03-20 16:46:10 +0000175 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);
Uwe Hermanna7e05482007-05-09 10:17:44 +0000180 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");
Ronald G. Minnich56439422002-09-06 16:58:14 +0000181 }
182 printf("\n");
Uwe Hermannfd374142007-08-23 15:20:38 +0000183 protect_jedec(bios);
Uwe Hermannffec5f32007-08-23 16:08:21 +0000184
185 return 0;
Ronald G. Minnich56439422002-09-06 16:58:14 +0000186}