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Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +00001/*
Uwe Hermannd1107642007-08-29 17:52:32 +00002 * This file is part of the flashrom project.
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +00003 *
Uwe Hermannd22a1d42007-09-09 20:21:05 +00004 * Copyright (C) 2000 Silicon Integrated System Corporation
5 * Copyright (C) 2005 coresystems GmbH <stepan@openbios.org>
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +00006 *
Uwe Hermannd1107642007-08-29 17:52:32 +00007 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +000011 *
Uwe Hermannd1107642007-08-29 17:52:32 +000012 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +000016 *
Uwe Hermannd1107642007-08-29 17:52:32 +000017 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +000020 */
21
Ronald G. Minnicheaab50b2003-09-12 22:41:53 +000022#include <stdio.h>
Ollie Lho184a4042005-11-26 21:55:36 +000023#include <stdint.h>
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +000024#include "flash.h"
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +000025
26#define AUTO_PG_ERASE1 0x20
27#define AUTO_PG_ERASE2 0xD0
Ollie Lhocf29de82004-03-18 19:40:07 +000028#define AUTO_PGRM 0x10
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +000029#define CHIP_ERASE 0x30
30#define RESET 0xFF
31#define READ_ID 0x90
32
Ollie Lho184a4042005-11-26 21:55:36 +000033static __inline__ void protect_28sf040(volatile uint8_t *bios)
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +000034{
35 /* ask compiler not to optimize this */
Ollie Lho184a4042005-11-26 21:55:36 +000036 volatile uint8_t tmp;
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +000037
Uwe Hermanna7e05482007-05-09 10:17:44 +000038 tmp = *(volatile uint8_t *)(bios + 0x1823);
39 tmp = *(volatile uint8_t *)(bios + 0x1820);
40 tmp = *(volatile uint8_t *)(bios + 0x1822);
41 tmp = *(volatile uint8_t *)(bios + 0x0418);
42 tmp = *(volatile uint8_t *)(bios + 0x041B);
43 tmp = *(volatile uint8_t *)(bios + 0x0419);
44 tmp = *(volatile uint8_t *)(bios + 0x040A);
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +000045}
46
Ollie Lho184a4042005-11-26 21:55:36 +000047static __inline__ void unprotect_28sf040(volatile uint8_t *bios)
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +000048{
49 /* ask compiler not to optimize this */
Ollie Lho184a4042005-11-26 21:55:36 +000050 volatile uint8_t tmp;
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +000051
Uwe Hermanna7e05482007-05-09 10:17:44 +000052 tmp = *(volatile uint8_t *)(bios + 0x1823);
53 tmp = *(volatile uint8_t *)(bios + 0x1820);
54 tmp = *(volatile uint8_t *)(bios + 0x1822);
55 tmp = *(volatile uint8_t *)(bios + 0x0418);
56 tmp = *(volatile uint8_t *)(bios + 0x041B);
57 tmp = *(volatile uint8_t *)(bios + 0x0419);
58 tmp = *(volatile uint8_t *)(bios + 0x041A);
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +000059}
60
Ollie Lho184a4042005-11-26 21:55:36 +000061static __inline__ int erase_sector_28sf040(volatile uint8_t *bios,
Ollie Lho761bf1b2004-03-20 16:46:10 +000062 unsigned long address)
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +000063{
64 *bios = AUTO_PG_ERASE1;
65 *(bios + address) = AUTO_PG_ERASE2;
66
67 /* wait for Toggle bit ready */
68 toggle_ready_jedec(bios);
Ronald G. Minnicheaab50b2003-09-12 22:41:53 +000069
Uwe Hermannffec5f32007-08-23 16:08:21 +000070 return 0;
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +000071}
72
Ollie Lho184a4042005-11-26 21:55:36 +000073static __inline__ int write_sector_28sf040(volatile uint8_t *bios,
74 uint8_t *src,
75 volatile uint8_t *dst,
Ollie Lho761bf1b2004-03-20 16:46:10 +000076 unsigned int page_size)
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +000077{
78 int i;
79
80 for (i = 0; i < page_size; i++) {
81 /* transfer data from source to destination */
82 if (*src == 0xFF) {
83 dst++, src++;
84 /* If the data is 0xFF, don't program it */
85 continue;
86 }
87 /*issue AUTO PROGRAM command */
Ollie Lho761bf1b2004-03-20 16:46:10 +000088 *dst = AUTO_PGRM;
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +000089 *dst++ = *src++;
90
91 /* wait for Toggle bit ready */
92 toggle_ready_jedec(bios);
93 }
Ronald G. Minnicheaab50b2003-09-12 22:41:53 +000094
Uwe Hermannffec5f32007-08-23 16:08:21 +000095 return 0;
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +000096}
97
Ollie Lho761bf1b2004-03-20 16:46:10 +000098int probe_28sf040(struct flashchip *flash)
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +000099{
Stefan Reinauerce532972007-05-23 17:20:56 +0000100 volatile uint8_t *bios = flash->virtual_memory;
Ed Swierk966dc202007-08-13 04:10:32 +0000101 uint8_t id1, id2;
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +0000102
103 *bios = RESET;
Ronald G. Minnichef5779d2002-01-29 20:18:02 +0000104 myusec_delay(10);
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +0000105
106 *bios = READ_ID;
Ronald G. Minnichef5779d2002-01-29 20:18:02 +0000107 myusec_delay(10);
Uwe Hermanna7e05482007-05-09 10:17:44 +0000108 id1 = *(volatile uint8_t *)bios;
Ronald G. Minnichef5779d2002-01-29 20:18:02 +0000109 myusec_delay(10);
Uwe Hermanna7e05482007-05-09 10:17:44 +0000110 id2 = *(volatile uint8_t *)(bios + 0x01);
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +0000111
112 *bios = RESET;
Ronald G. Minnichef5779d2002-01-29 20:18:02 +0000113 myusec_delay(10);
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +0000114
Ollie Lho184a4042005-11-26 21:55:36 +0000115 printf_debug("%s: id1 0x%x, id2 0x%x\n", __FUNCTION__, id1, id2);
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +0000116 if (id1 == flash->manufacture_id && id2 == flash->model_id)
117 return 1;
118
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +0000119 return 0;
120}
121
Ollie Lho761bf1b2004-03-20 16:46:10 +0000122int erase_28sf040(struct flashchip *flash)
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +0000123{
Stefan Reinauerce532972007-05-23 17:20:56 +0000124 volatile uint8_t *bios = flash->virtual_memory;
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +0000125
Ollie Lho761bf1b2004-03-20 16:46:10 +0000126 unprotect_28sf040(bios);
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +0000127 *bios = CHIP_ERASE;
128 *bios = CHIP_ERASE;
Ollie Lho761bf1b2004-03-20 16:46:10 +0000129 protect_28sf040(bios);
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +0000130
Ronald G. Minnichef5779d2002-01-29 20:18:02 +0000131 myusec_delay(10);
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +0000132 toggle_ready_jedec(bios);
Ronald G. Minnicheaab50b2003-09-12 22:41:53 +0000133
Uwe Hermannffec5f32007-08-23 16:08:21 +0000134 return 0;
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +0000135}
136
Ollie Lho184a4042005-11-26 21:55:36 +0000137int write_28sf040(struct flashchip *flash, uint8_t *buf)
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +0000138{
139 int i;
Uwe Hermanna7e05482007-05-09 10:17:44 +0000140 int total_size = flash->total_size * 1024;
141 int page_size = flash->page_size;
Stefan Reinauerce532972007-05-23 17:20:56 +0000142 volatile uint8_t *bios = flash->virtual_memory;
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +0000143
Ollie Lho761bf1b2004-03-20 16:46:10 +0000144 unprotect_28sf040(bios);
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +0000145
Ollie Lho761bf1b2004-03-20 16:46:10 +0000146 printf("Programming Page: ");
147 for (i = 0; i < total_size / page_size; i++) {
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +0000148 /* erase the page before programming */
149 erase_sector_28sf040(bios, i * page_size);
150
151 /* write to the sector */
Ollie Lho761bf1b2004-03-20 16:46:10 +0000152 printf("%04d at address: 0x%08x", i, i * page_size);
153 write_sector_28sf040(bios, buf + i * page_size,
154 bios + i * page_size, page_size);
Ollie Lho8b8897a2004-03-27 00:18:15 +0000155 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. Minnich5e5f75e2002-01-29 18:21:41 +0000156 }
157 printf("\n");
158
Ollie Lho761bf1b2004-03-20 16:46:10 +0000159 protect_28sf040(bios);
Ronald G. Minnicheaab50b2003-09-12 22:41:53 +0000160
Uwe Hermannffec5f32007-08-23 16:08:21 +0000161 return 0;
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +0000162}