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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>
Ronald G. Minnich56439422002-09-06 16:58:14 +000029#include <unistd.h>
30#include <stdio.h>
Ronald G. Minnicheaab50b2003-09-12 22:41:53 +000031#include <stdlib.h>
Ronald G. Minnich56439422002-09-06 16:58:14 +000032
33#include "flash.h"
34#include "82802ab.h"
Ollie Lho184a4042005-11-26 21:55:36 +000035#include "debug.h"
Ronald G. Minnich56439422002-09-06 16:58:14 +000036
37// I need that Berkeley bit-map printer
Ollie Lho184a4042005-11-26 21:55:36 +000038void print_82802ab_status(uint8_t status)
Ronald G. Minnich56439422002-09-06 16:58:14 +000039{
40 printf("%s", status & 0x80 ? "Ready:" : "Busy:");
41 printf("%s", status & 0x40 ? "BE SUSPEND:" : "BE RUN/FINISH:");
42 printf("%s", status & 0x20 ? "BE ERROR:" : "BE OK:");
43 printf("%s", status & 0x10 ? "PROG ERR:" : "PROG OK:");
44 printf("%s", status & 0x8 ? "VP ERR:" : "VPP OK:");
45 printf("%s", status & 0x4 ? "PROG SUSPEND:" : "PROG RUN/FINISH:");
46 printf("%s", status & 0x2 ? "WP|TBL#|WP#,ABORT:" : "UNLOCK:");
47}
48
Ollie Lho761bf1b2004-03-20 16:46:10 +000049int probe_82802ab(struct flashchip *flash)
Ronald G. Minnich56439422002-09-06 16:58:14 +000050{
Ollie Lho184a4042005-11-26 21:55:36 +000051 volatile uint8_t *bios = flash->virt_addr;
52 uint8_t id1, id2;
Ronald G. Minnich56439422002-09-06 16:58:14 +000053
54#if 0
Ollie Lho184a4042005-11-26 21:55:36 +000055 *(volatile uint8_t *) (bios + 0x5555) = 0xAA;
56 *(volatile uint8_t *) (bios + 0x2AAA) = 0x55;
57 *(volatile uint8_t *) (bios + 0x5555) = 0x90;
Ronald G. Minnich56439422002-09-06 16:58:14 +000058#endif
59
60 *bios = 0xff;
61 myusec_delay(10);
62 *bios = 0x90;
63 myusec_delay(10);
64
Ollie Lho184a4042005-11-26 21:55:36 +000065 id1 = *(volatile uint8_t *) bios;
66 id2 = *(volatile uint8_t *) (bios + 0x01);
Ronald G. Minnich56439422002-09-06 16:58:14 +000067
68#if 1
Ollie Lho184a4042005-11-26 21:55:36 +000069 *(volatile uint8_t *) (bios + 0x5555) = 0xAA;
70 *(volatile uint8_t *) (bios + 0x2AAA) = 0x55;
71 *(volatile uint8_t *) (bios + 0x5555) = 0xF0;
Ronald G. Minnich56439422002-09-06 16:58:14 +000072
73#endif
74 myusec_delay(10);
75
Ollie Lho184a4042005-11-26 21:55:36 +000076 printf_debug("%s: id1 0x%x, id2 0x%x\n", __FUNCTION__, id1, id2);
Ronald G. Minnichd4228fd2003-02-28 17:21:38 +000077
Ronald G. Minnich56439422002-09-06 16:58:14 +000078 if (id1 == flash->manufacture_id && id2 == flash->model_id) {
79 size_t size = flash->total_size * 1024;
80 // we need to mmap the write-protect space.
Ollie Lho761bf1b2004-03-20 16:46:10 +000081 bios = mmap(0, size, PROT_WRITE | PROT_READ, MAP_SHARED,
Stefan Reinauer70385642007-04-06 11:58:03 +000082 fd_mem, (off_t) (0 - 0x400000 - size));
Ollie Lho761bf1b2004-03-20 16:46:10 +000083 if (bios == MAP_FAILED) {
Ronald G. Minnich56439422002-09-06 16:58:14 +000084 // it's this part but we can't map it ...
Adam Kaufman064b1f22007-02-06 19:47:50 +000085 perror("Error MMAP memory using " MEM_DEV );
Ollie Lho761bf1b2004-03-20 16:46:10 +000086 exit(1);
87 }
Ronald G. Minnich56439422002-09-06 16:58:14 +000088
89 flash->virt_addr_2 = bios;
90 return 1;
91 }
92
93 return 0;
94}
95
Ollie Lho184a4042005-11-26 21:55:36 +000096uint8_t wait_82802ab(volatile uint8_t *bios)
Ronald G. Minnich56439422002-09-06 16:58:14 +000097{
98
Ollie Lho184a4042005-11-26 21:55:36 +000099 uint8_t status;
100 uint8_t id1, id2;
Ronald G. Minnich56439422002-09-06 16:58:14 +0000101
102 *bios = 0x70;
Ollie Lho761bf1b2004-03-20 16:46:10 +0000103 if ((*bios & 0x80) == 0) { // it's busy
104 while ((*bios & 0x80) == 0);
Ronald G. Minnich56439422002-09-06 16:58:14 +0000105 }
106
107 status = *bios;
108
109 // put another command to get out of status register mode
Ollie Lho761bf1b2004-03-20 16:46:10 +0000110
Ronald G. Minnich56439422002-09-06 16:58:14 +0000111 *bios = 0x90;
112 myusec_delay(10);
113
Ollie Lho184a4042005-11-26 21:55:36 +0000114 id1 = *(volatile uint8_t *) bios;
115 id2 = *(volatile uint8_t *) (bios + 0x01);
Ollie Lho761bf1b2004-03-20 16:46:10 +0000116
Ronald G. Minnich56439422002-09-06 16:58:14 +0000117 // this is needed to jam it out of "read id" mode
Ollie Lho184a4042005-11-26 21:55:36 +0000118 *(volatile uint8_t *) (bios + 0x5555) = 0xAA;
119 *(volatile uint8_t *) (bios + 0x2AAA) = 0x55;
120 *(volatile uint8_t *) (bios + 0x5555) = 0xF0;
Ronald G. Minnich56439422002-09-06 16:58:14 +0000121 return status;
Ollie Lho761bf1b2004-03-20 16:46:10 +0000122
Ronald G. Minnich56439422002-09-06 16:58:14 +0000123}
124int erase_82802ab_block(struct flashchip *flash, int offset)
125{
Ollie Lho184a4042005-11-26 21:55:36 +0000126 volatile uint8_t *bios = flash->virt_addr + offset;
127 volatile uint8_t *wrprotect =
Ollie Lho761bf1b2004-03-20 16:46:10 +0000128 flash->virt_addr_2 + offset + 2;
Ollie Lho184a4042005-11-26 21:55:36 +0000129 uint8_t status;
Ronald G. Minnich56439422002-09-06 16:58:14 +0000130
131 // clear status register
132 *bios = 0x50;
Ronald G. Minnichd4228fd2003-02-28 17:21:38 +0000133 //printf("Erase at %p\n", bios);
Ronald G. Minnich56439422002-09-06 16:58:14 +0000134 // clear write protect
Ronald G. Minnichd4228fd2003-02-28 17:21:38 +0000135 //printf("write protect is at %p\n", (wrprotect));
136 //printf("write protect is 0x%x\n", *(wrprotect));
Ronald G. Minnich56439422002-09-06 16:58:14 +0000137 *(wrprotect) = 0;
Ronald G. Minnichd4228fd2003-02-28 17:21:38 +0000138 //printf("write protect is 0x%x\n", *(wrprotect));
Ronald G. Minnich56439422002-09-06 16:58:14 +0000139
140 // now start it
Ollie Lho184a4042005-11-26 21:55:36 +0000141 *(volatile uint8_t *) (bios) = 0x20;
142 *(volatile uint8_t *) (bios) = 0xd0;
Ronald G. Minnich56439422002-09-06 16:58:14 +0000143 myusec_delay(10);
144 // now let's see what the register is
145 status = wait_82802ab(flash->virt_addr);
Ronald G. Minnichd4228fd2003-02-28 17:21:38 +0000146 //print_82802ab_status(status);
Ronald G. Minnich56439422002-09-06 16:58:14 +0000147 printf("DONE BLOCK 0x%x\n", offset);
Ollie Lho761bf1b2004-03-20 16:46:10 +0000148 return (0);
Ronald G. Minnich56439422002-09-06 16:58:14 +0000149}
Ollie Lho761bf1b2004-03-20 16:46:10 +0000150int erase_82802ab(struct flashchip *flash)
Ronald G. Minnich56439422002-09-06 16:58:14 +0000151{
152 int i;
Ronald G. Minnich56439422002-09-06 16:58:14 +0000153 unsigned int total_size = flash->total_size * 1024;
154
Ollie Lho761bf1b2004-03-20 16:46:10 +0000155 printf("total_size is %d; flash->page_size is %d\n",
156 total_size, flash->page_size);
157 for (i = 0; i < total_size; i += flash->page_size)
Ronald G. Minnich56439422002-09-06 16:58:14 +0000158 erase_82802ab_block(flash, i);
159 printf("DONE ERASE\n");
Ollie Lho761bf1b2004-03-20 16:46:10 +0000160 return (0);
Ronald G. Minnich56439422002-09-06 16:58:14 +0000161}
162
Ollie Lho184a4042005-11-26 21:55:36 +0000163void write_page_82802ab(volatile uint8_t *bios, uint8_t *src, volatile uint8_t *dst,
Ollie Lho761bf1b2004-03-20 16:46:10 +0000164 int page_size)
Ronald G. Minnich56439422002-09-06 16:58:14 +0000165{
166 int i;
Ronald G. Minnich56439422002-09-06 16:58:14 +0000167
Ollie Lho761bf1b2004-03-20 16:46:10 +0000168 for (i = 0; i < page_size; i++) {
169 /* transfer data from source to destination */
170 *dst = 0x40;
171 *dst++ = *src++;
172 wait_82802ab(bios);
173 }
174
175}
176
Ollie Lho184a4042005-11-26 21:55:36 +0000177int write_82802ab(struct flashchip *flash, uint8_t *buf)
Ollie Lho761bf1b2004-03-20 16:46:10 +0000178{
179 int i;
180 int total_size = flash->total_size * 1024, page_size =
181 flash->page_size;
Ollie Lho184a4042005-11-26 21:55:36 +0000182 volatile uint8_t *bios = flash->virt_addr;
Ollie Lho761bf1b2004-03-20 16:46:10 +0000183
184 erase_82802ab(flash);
Ronald G. Minnich56439422002-09-06 16:58:14 +0000185 if (*bios != 0xff) {
186 printf("ERASE FAILED\n");
187 return -1;
188 }
Ollie Lho761bf1b2004-03-20 16:46:10 +0000189 printf("Programming Page: ");
190 for (i = 0; i < total_size / page_size; i++) {
191 printf("%04d at address: 0x%08x", i, i * page_size);
192 write_page_82802ab(bios, buf + i * page_size,
193 bios + i * page_size, page_size);
194 printf
195 ("\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 +0000196 }
197 printf("\n");
Ollie Lho761bf1b2004-03-20 16:46:10 +0000198 protect_82802ab(bios);
199 return (0);
Ronald G. Minnich56439422002-09-06 16:58:14 +0000200}