Ronald G. Minnich | 5643942 | 2002-09-06 16:58:14 +0000 | [diff] [blame] | 1 | /* |
| 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. Minnich | 5643942 | 2002-09-06 16:58:14 +0000 | [diff] [blame] | 24 | */ |
| 25 | |
| 26 | #include <errno.h> |
| 27 | #include <fcntl.h> |
| 28 | #include <sys/mman.h> |
Ronald G. Minnich | 5643942 | 2002-09-06 16:58:14 +0000 | [diff] [blame] | 29 | #include <unistd.h> |
| 30 | #include <stdio.h> |
Ronald G. Minnich | eaab50b | 2003-09-12 22:41:53 +0000 | [diff] [blame] | 31 | #include <stdlib.h> |
Ronald G. Minnich | 5643942 | 2002-09-06 16:58:14 +0000 | [diff] [blame] | 32 | |
| 33 | #include "flash.h" |
| 34 | #include "82802ab.h" |
Ollie Lho | 184a404 | 2005-11-26 21:55:36 +0000 | [diff] [blame] | 35 | #include "debug.h" |
Ronald G. Minnich | 5643942 | 2002-09-06 16:58:14 +0000 | [diff] [blame] | 36 | |
| 37 | // I need that Berkeley bit-map printer |
Ollie Lho | 184a404 | 2005-11-26 21:55:36 +0000 | [diff] [blame] | 38 | void print_82802ab_status(uint8_t status) |
Ronald G. Minnich | 5643942 | 2002-09-06 16:58:14 +0000 | [diff] [blame] | 39 | { |
| 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 Lho | 761bf1b | 2004-03-20 16:46:10 +0000 | [diff] [blame] | 49 | int probe_82802ab(struct flashchip *flash) |
Ronald G. Minnich | 5643942 | 2002-09-06 16:58:14 +0000 | [diff] [blame] | 50 | { |
Ollie Lho | 184a404 | 2005-11-26 21:55:36 +0000 | [diff] [blame] | 51 | volatile uint8_t *bios = flash->virt_addr; |
| 52 | uint8_t id1, id2; |
Ronald G. Minnich | 5643942 | 2002-09-06 16:58:14 +0000 | [diff] [blame] | 53 | |
| 54 | #if 0 |
Ollie Lho | 184a404 | 2005-11-26 21:55:36 +0000 | [diff] [blame] | 55 | *(volatile uint8_t *) (bios + 0x5555) = 0xAA; |
| 56 | *(volatile uint8_t *) (bios + 0x2AAA) = 0x55; |
| 57 | *(volatile uint8_t *) (bios + 0x5555) = 0x90; |
Ronald G. Minnich | 5643942 | 2002-09-06 16:58:14 +0000 | [diff] [blame] | 58 | #endif |
| 59 | |
| 60 | *bios = 0xff; |
| 61 | myusec_delay(10); |
| 62 | *bios = 0x90; |
| 63 | myusec_delay(10); |
| 64 | |
Ollie Lho | 184a404 | 2005-11-26 21:55:36 +0000 | [diff] [blame] | 65 | id1 = *(volatile uint8_t *) bios; |
| 66 | id2 = *(volatile uint8_t *) (bios + 0x01); |
Ronald G. Minnich | 5643942 | 2002-09-06 16:58:14 +0000 | [diff] [blame] | 67 | |
| 68 | #if 1 |
Ollie Lho | 184a404 | 2005-11-26 21:55:36 +0000 | [diff] [blame] | 69 | *(volatile uint8_t *) (bios + 0x5555) = 0xAA; |
| 70 | *(volatile uint8_t *) (bios + 0x2AAA) = 0x55; |
| 71 | *(volatile uint8_t *) (bios + 0x5555) = 0xF0; |
Ronald G. Minnich | 5643942 | 2002-09-06 16:58:14 +0000 | [diff] [blame] | 72 | |
| 73 | #endif |
| 74 | myusec_delay(10); |
| 75 | |
Ollie Lho | 184a404 | 2005-11-26 21:55:36 +0000 | [diff] [blame] | 76 | printf_debug("%s: id1 0x%x, id2 0x%x\n", __FUNCTION__, id1, id2); |
Ronald G. Minnich | d4228fd | 2003-02-28 17:21:38 +0000 | [diff] [blame] | 77 | |
Ronald G. Minnich | 5643942 | 2002-09-06 16:58:14 +0000 | [diff] [blame] | 78 | 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 Lho | 761bf1b | 2004-03-20 16:46:10 +0000 | [diff] [blame] | 81 | bios = mmap(0, size, PROT_WRITE | PROT_READ, MAP_SHARED, |
Stefan Reinauer | 7038564 | 2007-04-06 11:58:03 +0000 | [diff] [blame] | 82 | fd_mem, (off_t) (0 - 0x400000 - size)); |
Ollie Lho | 761bf1b | 2004-03-20 16:46:10 +0000 | [diff] [blame] | 83 | if (bios == MAP_FAILED) { |
Ronald G. Minnich | 5643942 | 2002-09-06 16:58:14 +0000 | [diff] [blame] | 84 | // it's this part but we can't map it ... |
Adam Kaufman | 064b1f2 | 2007-02-06 19:47:50 +0000 | [diff] [blame] | 85 | perror("Error MMAP memory using " MEM_DEV ); |
Ollie Lho | 761bf1b | 2004-03-20 16:46:10 +0000 | [diff] [blame] | 86 | exit(1); |
| 87 | } |
Ronald G. Minnich | 5643942 | 2002-09-06 16:58:14 +0000 | [diff] [blame] | 88 | |
| 89 | flash->virt_addr_2 = bios; |
| 90 | return 1; |
| 91 | } |
| 92 | |
| 93 | return 0; |
| 94 | } |
| 95 | |
Ollie Lho | 184a404 | 2005-11-26 21:55:36 +0000 | [diff] [blame] | 96 | uint8_t wait_82802ab(volatile uint8_t *bios) |
Ronald G. Minnich | 5643942 | 2002-09-06 16:58:14 +0000 | [diff] [blame] | 97 | { |
| 98 | |
Ollie Lho | 184a404 | 2005-11-26 21:55:36 +0000 | [diff] [blame] | 99 | uint8_t status; |
| 100 | uint8_t id1, id2; |
Ronald G. Minnich | 5643942 | 2002-09-06 16:58:14 +0000 | [diff] [blame] | 101 | |
| 102 | *bios = 0x70; |
Ollie Lho | 761bf1b | 2004-03-20 16:46:10 +0000 | [diff] [blame] | 103 | if ((*bios & 0x80) == 0) { // it's busy |
| 104 | while ((*bios & 0x80) == 0); |
Ronald G. Minnich | 5643942 | 2002-09-06 16:58:14 +0000 | [diff] [blame] | 105 | } |
| 106 | |
| 107 | status = *bios; |
| 108 | |
| 109 | // put another command to get out of status register mode |
Ollie Lho | 761bf1b | 2004-03-20 16:46:10 +0000 | [diff] [blame] | 110 | |
Ronald G. Minnich | 5643942 | 2002-09-06 16:58:14 +0000 | [diff] [blame] | 111 | *bios = 0x90; |
| 112 | myusec_delay(10); |
| 113 | |
Ollie Lho | 184a404 | 2005-11-26 21:55:36 +0000 | [diff] [blame] | 114 | id1 = *(volatile uint8_t *) bios; |
| 115 | id2 = *(volatile uint8_t *) (bios + 0x01); |
Ollie Lho | 761bf1b | 2004-03-20 16:46:10 +0000 | [diff] [blame] | 116 | |
Ronald G. Minnich | 5643942 | 2002-09-06 16:58:14 +0000 | [diff] [blame] | 117 | // this is needed to jam it out of "read id" mode |
Ollie Lho | 184a404 | 2005-11-26 21:55:36 +0000 | [diff] [blame] | 118 | *(volatile uint8_t *) (bios + 0x5555) = 0xAA; |
| 119 | *(volatile uint8_t *) (bios + 0x2AAA) = 0x55; |
| 120 | *(volatile uint8_t *) (bios + 0x5555) = 0xF0; |
Ronald G. Minnich | 5643942 | 2002-09-06 16:58:14 +0000 | [diff] [blame] | 121 | return status; |
Ollie Lho | 761bf1b | 2004-03-20 16:46:10 +0000 | [diff] [blame] | 122 | |
Ronald G. Minnich | 5643942 | 2002-09-06 16:58:14 +0000 | [diff] [blame] | 123 | } |
| 124 | int erase_82802ab_block(struct flashchip *flash, int offset) |
| 125 | { |
Ollie Lho | 184a404 | 2005-11-26 21:55:36 +0000 | [diff] [blame] | 126 | volatile uint8_t *bios = flash->virt_addr + offset; |
| 127 | volatile uint8_t *wrprotect = |
Ollie Lho | 761bf1b | 2004-03-20 16:46:10 +0000 | [diff] [blame] | 128 | flash->virt_addr_2 + offset + 2; |
Ollie Lho | 184a404 | 2005-11-26 21:55:36 +0000 | [diff] [blame] | 129 | uint8_t status; |
Ronald G. Minnich | 5643942 | 2002-09-06 16:58:14 +0000 | [diff] [blame] | 130 | |
| 131 | // clear status register |
| 132 | *bios = 0x50; |
Ronald G. Minnich | d4228fd | 2003-02-28 17:21:38 +0000 | [diff] [blame] | 133 | //printf("Erase at %p\n", bios); |
Ronald G. Minnich | 5643942 | 2002-09-06 16:58:14 +0000 | [diff] [blame] | 134 | // clear write protect |
Ronald G. Minnich | d4228fd | 2003-02-28 17:21:38 +0000 | [diff] [blame] | 135 | //printf("write protect is at %p\n", (wrprotect)); |
| 136 | //printf("write protect is 0x%x\n", *(wrprotect)); |
Ronald G. Minnich | 5643942 | 2002-09-06 16:58:14 +0000 | [diff] [blame] | 137 | *(wrprotect) = 0; |
Ronald G. Minnich | d4228fd | 2003-02-28 17:21:38 +0000 | [diff] [blame] | 138 | //printf("write protect is 0x%x\n", *(wrprotect)); |
Ronald G. Minnich | 5643942 | 2002-09-06 16:58:14 +0000 | [diff] [blame] | 139 | |
| 140 | // now start it |
Ollie Lho | 184a404 | 2005-11-26 21:55:36 +0000 | [diff] [blame] | 141 | *(volatile uint8_t *) (bios) = 0x20; |
| 142 | *(volatile uint8_t *) (bios) = 0xd0; |
Ronald G. Minnich | 5643942 | 2002-09-06 16:58:14 +0000 | [diff] [blame] | 143 | myusec_delay(10); |
| 144 | // now let's see what the register is |
| 145 | status = wait_82802ab(flash->virt_addr); |
Ronald G. Minnich | d4228fd | 2003-02-28 17:21:38 +0000 | [diff] [blame] | 146 | //print_82802ab_status(status); |
Ronald G. Minnich | 5643942 | 2002-09-06 16:58:14 +0000 | [diff] [blame] | 147 | printf("DONE BLOCK 0x%x\n", offset); |
Ollie Lho | 761bf1b | 2004-03-20 16:46:10 +0000 | [diff] [blame] | 148 | return (0); |
Ronald G. Minnich | 5643942 | 2002-09-06 16:58:14 +0000 | [diff] [blame] | 149 | } |
Ollie Lho | 761bf1b | 2004-03-20 16:46:10 +0000 | [diff] [blame] | 150 | int erase_82802ab(struct flashchip *flash) |
Ronald G. Minnich | 5643942 | 2002-09-06 16:58:14 +0000 | [diff] [blame] | 151 | { |
| 152 | int i; |
Ronald G. Minnich | 5643942 | 2002-09-06 16:58:14 +0000 | [diff] [blame] | 153 | unsigned int total_size = flash->total_size * 1024; |
| 154 | |
Ollie Lho | 761bf1b | 2004-03-20 16:46:10 +0000 | [diff] [blame] | 155 | 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. Minnich | 5643942 | 2002-09-06 16:58:14 +0000 | [diff] [blame] | 158 | erase_82802ab_block(flash, i); |
| 159 | printf("DONE ERASE\n"); |
Ollie Lho | 761bf1b | 2004-03-20 16:46:10 +0000 | [diff] [blame] | 160 | return (0); |
Ronald G. Minnich | 5643942 | 2002-09-06 16:58:14 +0000 | [diff] [blame] | 161 | } |
| 162 | |
Ollie Lho | 184a404 | 2005-11-26 21:55:36 +0000 | [diff] [blame] | 163 | void write_page_82802ab(volatile uint8_t *bios, uint8_t *src, volatile uint8_t *dst, |
Ollie Lho | 761bf1b | 2004-03-20 16:46:10 +0000 | [diff] [blame] | 164 | int page_size) |
Ronald G. Minnich | 5643942 | 2002-09-06 16:58:14 +0000 | [diff] [blame] | 165 | { |
| 166 | int i; |
Ronald G. Minnich | 5643942 | 2002-09-06 16:58:14 +0000 | [diff] [blame] | 167 | |
Ollie Lho | 761bf1b | 2004-03-20 16:46:10 +0000 | [diff] [blame] | 168 | 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 Lho | 184a404 | 2005-11-26 21:55:36 +0000 | [diff] [blame] | 177 | int write_82802ab(struct flashchip *flash, uint8_t *buf) |
Ollie Lho | 761bf1b | 2004-03-20 16:46:10 +0000 | [diff] [blame] | 178 | { |
| 179 | int i; |
| 180 | int total_size = flash->total_size * 1024, page_size = |
| 181 | flash->page_size; |
Ollie Lho | 184a404 | 2005-11-26 21:55:36 +0000 | [diff] [blame] | 182 | volatile uint8_t *bios = flash->virt_addr; |
Ollie Lho | 761bf1b | 2004-03-20 16:46:10 +0000 | [diff] [blame] | 183 | |
| 184 | erase_82802ab(flash); |
Ronald G. Minnich | 5643942 | 2002-09-06 16:58:14 +0000 | [diff] [blame] | 185 | if (*bios != 0xff) { |
| 186 | printf("ERASE FAILED\n"); |
| 187 | return -1; |
| 188 | } |
Ollie Lho | 761bf1b | 2004-03-20 16:46:10 +0000 | [diff] [blame] | 189 | 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. Minnich | 5643942 | 2002-09-06 16:58:14 +0000 | [diff] [blame] | 196 | } |
| 197 | printf("\n"); |
Ollie Lho | 761bf1b | 2004-03-20 16:46:10 +0000 | [diff] [blame] | 198 | protect_82802ab(bios); |
| 199 | return (0); |
Ronald G. Minnich | 5643942 | 2002-09-06 16:58:14 +0000 | [diff] [blame] | 200 | } |