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Ronald G. Minnich56439422002-09-06 16:58:14 +00001/*
2 * 82802ab.c: driver for programming JEDEC standard flash parts
3 *
4 *
5 * Copyright 2000 Silicon Integrated System Corporation
6 *
7 * 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.
11 *
12 * 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.
16 *
17 * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
20 *
21 *
22 * Reference: http://www.intel.com/design/chipsets/datashts/290658.htm
23 *
Ronald G. Minnich56439422002-09-06 16:58:14 +000024 */
25
26#include <errno.h>
27#include <fcntl.h>
28#include <sys/mman.h>
29#include <sys/io.h>
30#include <unistd.h>
31#include <stdio.h>
Ronald G. Minnicheaab50b2003-09-12 22:41:53 +000032#include <stdlib.h>
Ronald G. Minnich56439422002-09-06 16:58:14 +000033
34#include "flash.h"
35#include "82802ab.h"
Ollie Lho184a4042005-11-26 21:55:36 +000036#include "debug.h"
Ronald G. Minnich56439422002-09-06 16:58:14 +000037
38// I need that Berkeley bit-map printer
Ollie Lho184a4042005-11-26 21:55:36 +000039void print_82802ab_status(uint8_t status)
Ronald G. Minnich56439422002-09-06 16:58:14 +000040{
41 printf("%s", status & 0x80 ? "Ready:" : "Busy:");
42 printf("%s", status & 0x40 ? "BE SUSPEND:" : "BE RUN/FINISH:");
43 printf("%s", status & 0x20 ? "BE ERROR:" : "BE OK:");
44 printf("%s", status & 0x10 ? "PROG ERR:" : "PROG OK:");
45 printf("%s", status & 0x8 ? "VP ERR:" : "VPP OK:");
46 printf("%s", status & 0x4 ? "PROG SUSPEND:" : "PROG RUN/FINISH:");
47 printf("%s", status & 0x2 ? "WP|TBL#|WP#,ABORT:" : "UNLOCK:");
48}
49
Ollie Lho761bf1b2004-03-20 16:46:10 +000050int probe_82802ab(struct flashchip *flash)
Ronald G. Minnich56439422002-09-06 16:58:14 +000051{
Ollie Lho184a4042005-11-26 21:55:36 +000052 volatile uint8_t *bios = flash->virt_addr;
53 uint8_t id1, id2;
Ronald G. Minnich56439422002-09-06 16:58:14 +000054
55#if 0
Ollie Lho184a4042005-11-26 21:55:36 +000056 *(volatile uint8_t *) (bios + 0x5555) = 0xAA;
57 *(volatile uint8_t *) (bios + 0x2AAA) = 0x55;
58 *(volatile uint8_t *) (bios + 0x5555) = 0x90;
Ronald G. Minnich56439422002-09-06 16:58:14 +000059#endif
60
61 *bios = 0xff;
62 myusec_delay(10);
63 *bios = 0x90;
64 myusec_delay(10);
65
Ollie Lho184a4042005-11-26 21:55:36 +000066 id1 = *(volatile uint8_t *) bios;
67 id2 = *(volatile uint8_t *) (bios + 0x01);
Ronald G. Minnich56439422002-09-06 16:58:14 +000068
69#if 1
Ollie Lho184a4042005-11-26 21:55:36 +000070 *(volatile uint8_t *) (bios + 0x5555) = 0xAA;
71 *(volatile uint8_t *) (bios + 0x2AAA) = 0x55;
72 *(volatile uint8_t *) (bios + 0x5555) = 0xF0;
Ronald G. Minnich56439422002-09-06 16:58:14 +000073
74#endif
75 myusec_delay(10);
76
Ollie Lho184a4042005-11-26 21:55:36 +000077 printf_debug("%s: id1 0x%x, id2 0x%x\n", __FUNCTION__, id1, id2);
Ronald G. Minnichd4228fd2003-02-28 17:21:38 +000078
Ronald G. Minnich56439422002-09-06 16:58:14 +000079 if (id1 == flash->manufacture_id && id2 == flash->model_id) {
80 size_t size = flash->total_size * 1024;
81 // we need to mmap the write-protect space.
Ollie Lho761bf1b2004-03-20 16:46:10 +000082 bios = mmap(0, size, PROT_WRITE | PROT_READ, MAP_SHARED,
83 flash->fd_mem, (off_t) (0 - 0x400000 - size));
84 if (bios == MAP_FAILED) {
Ronald G. Minnich56439422002-09-06 16:58:14 +000085 // it's this part but we can't map it ...
Ollie Lho761bf1b2004-03-20 16:46:10 +000086 perror("Error MMAP /dev/mem");
87 exit(1);
88 }
Ronald G. Minnich56439422002-09-06 16:58:14 +000089
90 flash->virt_addr_2 = bios;
91 return 1;
92 }
93
94 return 0;
95}
96
Ollie Lho184a4042005-11-26 21:55:36 +000097uint8_t wait_82802ab(volatile uint8_t *bios)
Ronald G. Minnich56439422002-09-06 16:58:14 +000098{
99
Ollie Lho184a4042005-11-26 21:55:36 +0000100 uint8_t status;
101 uint8_t id1, id2;
Ronald G. Minnich56439422002-09-06 16:58:14 +0000102
103 *bios = 0x70;
Ollie Lho761bf1b2004-03-20 16:46:10 +0000104 if ((*bios & 0x80) == 0) { // it's busy
105 while ((*bios & 0x80) == 0);
Ronald G. Minnich56439422002-09-06 16:58:14 +0000106 }
107
108 status = *bios;
109
110 // put another command to get out of status register mode
Ollie Lho761bf1b2004-03-20 16:46:10 +0000111
Ronald G. Minnich56439422002-09-06 16:58:14 +0000112 *bios = 0x90;
113 myusec_delay(10);
114
Ollie Lho184a4042005-11-26 21:55:36 +0000115 id1 = *(volatile uint8_t *) bios;
116 id2 = *(volatile uint8_t *) (bios + 0x01);
Ollie Lho761bf1b2004-03-20 16:46:10 +0000117
Ronald G. Minnich56439422002-09-06 16:58:14 +0000118 // this is needed to jam it out of "read id" mode
Ollie Lho184a4042005-11-26 21:55:36 +0000119 *(volatile uint8_t *) (bios + 0x5555) = 0xAA;
120 *(volatile uint8_t *) (bios + 0x2AAA) = 0x55;
121 *(volatile uint8_t *) (bios + 0x5555) = 0xF0;
Ronald G. Minnich56439422002-09-06 16:58:14 +0000122 return status;
Ollie Lho761bf1b2004-03-20 16:46:10 +0000123
Ronald G. Minnich56439422002-09-06 16:58:14 +0000124}
125int erase_82802ab_block(struct flashchip *flash, int offset)
126{
Ollie Lho184a4042005-11-26 21:55:36 +0000127 volatile uint8_t *bios = flash->virt_addr + offset;
128 volatile uint8_t *wrprotect =
Ollie Lho761bf1b2004-03-20 16:46:10 +0000129 flash->virt_addr_2 + offset + 2;
Ollie Lho184a4042005-11-26 21:55:36 +0000130 uint8_t status;
Ronald G. Minnich56439422002-09-06 16:58:14 +0000131
132 // clear status register
133 *bios = 0x50;
Ronald G. Minnichd4228fd2003-02-28 17:21:38 +0000134 //printf("Erase at %p\n", bios);
Ronald G. Minnich56439422002-09-06 16:58:14 +0000135 // clear write protect
Ronald G. Minnichd4228fd2003-02-28 17:21:38 +0000136 //printf("write protect is at %p\n", (wrprotect));
137 //printf("write protect is 0x%x\n", *(wrprotect));
Ronald G. Minnich56439422002-09-06 16:58:14 +0000138 *(wrprotect) = 0;
Ronald G. Minnichd4228fd2003-02-28 17:21:38 +0000139 //printf("write protect is 0x%x\n", *(wrprotect));
Ronald G. Minnich56439422002-09-06 16:58:14 +0000140
141 // now start it
Ollie Lho184a4042005-11-26 21:55:36 +0000142 *(volatile uint8_t *) (bios) = 0x20;
143 *(volatile uint8_t *) (bios) = 0xd0;
Ronald G. Minnich56439422002-09-06 16:58:14 +0000144 myusec_delay(10);
145 // now let's see what the register is
146 status = wait_82802ab(flash->virt_addr);
Ronald G. Minnichd4228fd2003-02-28 17:21:38 +0000147 //print_82802ab_status(status);
Ronald G. Minnich56439422002-09-06 16:58:14 +0000148 printf("DONE BLOCK 0x%x\n", offset);
Ollie Lho761bf1b2004-03-20 16:46:10 +0000149 return (0);
Ronald G. Minnich56439422002-09-06 16:58:14 +0000150}
Ollie Lho761bf1b2004-03-20 16:46:10 +0000151int erase_82802ab(struct flashchip *flash)
Ronald G. Minnich56439422002-09-06 16:58:14 +0000152{
153 int i;
Ronald G. Minnich56439422002-09-06 16:58:14 +0000154 unsigned int total_size = flash->total_size * 1024;
155
Ollie Lho761bf1b2004-03-20 16:46:10 +0000156 printf("total_size is %d; flash->page_size is %d\n",
157 total_size, flash->page_size);
158 for (i = 0; i < total_size; i += flash->page_size)
Ronald G. Minnich56439422002-09-06 16:58:14 +0000159 erase_82802ab_block(flash, i);
160 printf("DONE ERASE\n");
Ollie Lho761bf1b2004-03-20 16:46:10 +0000161 return (0);
Ronald G. Minnich56439422002-09-06 16:58:14 +0000162}
163
Ollie Lho184a4042005-11-26 21:55:36 +0000164void write_page_82802ab(volatile uint8_t *bios, uint8_t *src, volatile uint8_t *dst,
Ollie Lho761bf1b2004-03-20 16:46:10 +0000165 int page_size)
Ronald G. Minnich56439422002-09-06 16:58:14 +0000166{
167 int i;
Ronald G. Minnich56439422002-09-06 16:58:14 +0000168
Ollie Lho761bf1b2004-03-20 16:46:10 +0000169 for (i = 0; i < page_size; i++) {
170 /* transfer data from source to destination */
171 *dst = 0x40;
172 *dst++ = *src++;
173 wait_82802ab(bios);
174 }
175
176}
177
Ollie Lho184a4042005-11-26 21:55:36 +0000178int write_82802ab(struct flashchip *flash, uint8_t *buf)
Ollie Lho761bf1b2004-03-20 16:46:10 +0000179{
180 int i;
181 int total_size = flash->total_size * 1024, page_size =
182 flash->page_size;
Ollie Lho184a4042005-11-26 21:55:36 +0000183 volatile uint8_t *bios = flash->virt_addr;
Ollie Lho761bf1b2004-03-20 16:46:10 +0000184
185 erase_82802ab(flash);
Ronald G. Minnich56439422002-09-06 16:58:14 +0000186 if (*bios != 0xff) {
187 printf("ERASE FAILED\n");
188 return -1;
189 }
Ollie Lho761bf1b2004-03-20 16:46:10 +0000190 printf("Programming Page: ");
191 for (i = 0; i < total_size / page_size; i++) {
192 printf("%04d at address: 0x%08x", i, i * page_size);
193 write_page_82802ab(bios, buf + i * page_size,
194 bios + i * page_size, page_size);
195 printf
196 ("\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 +0000197 }
198 printf("\n");
Ollie Lho761bf1b2004-03-20 16:46:10 +0000199 protect_82802ab(bios);
200 return (0);
Ronald G. Minnich56439422002-09-06 16:58:14 +0000201}