Claus Gindhart | a7b3551 | 2008-04-28 17:51:09 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * This file is part of the flashrom project. |
| 3 | * |
| 4 | * Copyright (C) 2008 Claus Gindhart <claus.gindhart@kontron.com> |
| 5 | * |
| 6 | * 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. |
| 10 | * |
| 11 | * 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. |
| 15 | * |
| 16 | * 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 | /* |
| 23 | * This module is designed for supporting the devices |
| 24 | * ST M50FLW040A (not yet tested) |
| 25 | * ST M50FLW040B (not yet tested) |
| 26 | * ST M50FLW080A |
| 27 | * ST M50FLW080B (not yet tested) |
| 28 | * |
| 29 | */ |
| 30 | |
| 31 | #include <stdio.h> |
| 32 | #include <string.h> |
| 33 | #include <stdint.h> |
| 34 | #include "flash.h" |
| 35 | |
| 36 | void protect_stm50flw0x0x(volatile uint8_t *bios) |
| 37 | { |
| 38 | *(volatile uint8_t *)(bios + 0x5555) = 0xAA; |
| 39 | *(volatile uint8_t *)(bios + 0x2AAA) = 0x55; |
| 40 | *(volatile uint8_t *)(bios + 0x5555) = 0xA0; |
| 41 | |
| 42 | usleep(200); |
| 43 | } |
| 44 | |
| 45 | int probe_stm50flw0x0x(struct flashchip *flash) |
| 46 | { |
| 47 | volatile uint8_t *bios = flash->virtual_memory; |
| 48 | uint8_t id1, id2; |
| 49 | uint32_t largeid1, largeid2; |
| 50 | |
| 51 | /* Issue JEDEC Product ID Entry command */ |
| 52 | *(volatile uint8_t *)(bios + 0x5555) = 0xAA; |
| 53 | myusec_delay(10); |
| 54 | *(volatile uint8_t *)(bios + 0x2AAA) = 0x55; |
| 55 | myusec_delay(10); |
| 56 | *(volatile uint8_t *)(bios + 0x5555) = 0x90; |
| 57 | myusec_delay(40); |
| 58 | |
| 59 | /* Read product ID */ |
| 60 | id1 = *(volatile uint8_t *)bios; |
| 61 | id2 = *(volatile uint8_t *)(bios + 0x01); |
| 62 | largeid1 = id1; |
| 63 | largeid2 = id2; |
| 64 | |
| 65 | /* Check if it is a continuation ID, this should be a while loop. */ |
| 66 | if (id1 == 0x7F) { |
| 67 | largeid1 <<= 8; |
| 68 | id1 = *(volatile uint8_t *)(bios + 0x100); |
| 69 | largeid1 |= id1; |
| 70 | } |
| 71 | if (id2 == 0x7F) { |
| 72 | largeid2 <<= 8; |
| 73 | id2 = *(volatile uint8_t *)(bios + 0x101); |
| 74 | largeid2 |= id2; |
| 75 | } |
| 76 | |
| 77 | /* Issue JEDEC Product ID Exit command */ |
| 78 | *(volatile uint8_t *)(bios + 0x5555) = 0xAA; |
| 79 | myusec_delay(10); |
| 80 | *(volatile uint8_t *)(bios + 0x2AAA) = 0x55; |
| 81 | myusec_delay(10); |
| 82 | *(volatile uint8_t *)(bios + 0x5555) = 0xF0; |
| 83 | myusec_delay(40); |
| 84 | |
| 85 | printf_debug("%s: id1 0x%x, id2 0x%x\n", __FUNCTION__, largeid1, |
| 86 | largeid2); |
| 87 | |
| 88 | if (largeid1 != flash->manufacture_id || largeid2 != flash->model_id) |
| 89 | return 0; |
| 90 | |
| 91 | map_flash_registers(flash); |
| 92 | |
| 93 | return 1; |
| 94 | } |
| 95 | |
| 96 | |
| 97 | static void wait_stm50flw0x0x(volatile uint8_t *bios) |
| 98 | { |
| 99 | uint8_t id1; |
| 100 | // id2; |
| 101 | |
| 102 | *bios = 0x70; |
| 103 | if ((*bios & 0x80) == 0) { // it's busy |
| 104 | while ((*bios & 0x80) == 0) ; |
| 105 | } |
| 106 | // put another command to get out of status register mode |
| 107 | |
| 108 | *bios = 0x90; |
| 109 | myusec_delay(10); |
| 110 | |
| 111 | id1 = *(volatile uint8_t *)bios; |
| 112 | |
| 113 | // this is needed to jam it out of "read id" mode |
| 114 | *(volatile uint8_t *)(bios + 0x5555) = 0xAA; |
| 115 | *(volatile uint8_t *)(bios + 0x2AAA) = 0x55; |
| 116 | *(volatile uint8_t *)(bios + 0x5555) = 0xF0; |
| 117 | |
| 118 | } |
| 119 | |
| 120 | /* |
| 121 | * claus.gindhart@kontron.com |
| 122 | * The ST M50FLW080B and STM50FLW080B chips have to be unlocked, |
| 123 | * before you can erase them or write to them |
| 124 | */ |
| 125 | int unlock_block_stm50flw0x0x(struct flashchip *flash, int offset) |
| 126 | { |
| 127 | volatile uint8_t *flash_addr = flash->virtual_registers + 2; |
| 128 | const uint8_t unlock_sector = 0x00; |
| 129 | int j; |
| 130 | |
| 131 | /* These chips have to be unlocked before you can erase |
| 132 | * them or write to them |
| 133 | * The size of the locking sectors depends on the type |
| 134 | * of chip |
| 135 | * |
| 136 | * Sometimes, the BIOS does this for you; so you propably |
| 137 | * dont need to worry about that |
| 138 | */ |
| 139 | |
| 140 | /* check, if it's is a top/bottom-block with 4k-sectors */ |
| 141 | /* TODO: What about the other types ? */ |
| 142 | if ((offset == 0) || |
| 143 | (offset == (flash->model_id == ST_M50FLW080A ? 0xE0000 : 0x10000)) |
| 144 | || (offset == 0xF0000)) { |
| 145 | |
| 146 | // unlock each 4k-sector |
| 147 | for (j = 0; j < 0x10000; j += 0x1000) { |
| 148 | printf_debug("unlocking at 0x%x\n", offset + j); |
| 149 | *(flash_addr + offset + j) = unlock_sector; |
| 150 | if (*(flash_addr + offset + j) != unlock_sector) |
| 151 | { |
| 152 | printf("Cannot unlock sector @ 0x%x\n",offset + j); |
| 153 | return -1; |
| 154 | } |
| 155 | } |
| 156 | } else { |
| 157 | printf_debug("unlocking at 0x%x\n", offset); |
| 158 | *(flash_addr + offset) = unlock_sector; |
| 159 | if (*(flash_addr + offset) != unlock_sector) |
| 160 | { |
| 161 | printf("Cannot unlock sector @ 0x%x\n", offset); |
| 162 | return -1; |
| 163 | } |
| 164 | } |
| 165 | |
| 166 | return 0; |
| 167 | } |
| 168 | |
| 169 | int erase_block_stm50flw0x0x(struct flashchip *flash, int offset) |
| 170 | { |
| 171 | volatile uint8_t *bios = flash->virtual_memory + offset; |
| 172 | int j; |
| 173 | |
| 174 | // clear status register |
| 175 | *bios = 0x50; |
| 176 | printf_debug("Erase at %p\n", bios); |
| 177 | // now start it |
| 178 | *(volatile uint8_t *)(bios) = 0x20; |
| 179 | *(volatile uint8_t *)(bios) = 0xd0; |
| 180 | myusec_delay(10); |
| 181 | |
| 182 | wait_stm50flw0x0x(flash->virtual_memory); |
| 183 | |
| 184 | for (j = 0; j < flash->page_size; j++) { |
| 185 | if (*(bios + j) != 0xFF) { |
| 186 | printf("Erase failed at 0x%x\n", offset + j); |
| 187 | return -1; |
| 188 | } |
| 189 | } |
| 190 | |
| 191 | printf("DONE BLOCK 0x%x\n", offset); |
| 192 | |
| 193 | return 0; |
| 194 | } |
| 195 | |
| 196 | int write_page_stm50flw0x0x(volatile uint8_t *bios, uint8_t *src, |
| 197 | volatile uint8_t *dst, int page_size) |
| 198 | { |
| 199 | int i, rc=0; |
| 200 | volatile uint8_t *d = dst; |
| 201 | uint8_t *s = src; |
| 202 | |
| 203 | /* transfer data from source to destination */ |
| 204 | for (i = 0; i < page_size; i++) { |
| 205 | *dst = 0x40; |
| 206 | *dst++ = *src++; |
| 207 | wait_stm50flw0x0x(bios); |
| 208 | } |
| 209 | |
| 210 | /* claus.gindhart@kontron.com |
| 211 | * TODO |
| 212 | * I think, that verification is not required, but |
| 213 | * i leave it in anyway |
| 214 | */ |
| 215 | dst = d; |
| 216 | src = s; |
| 217 | for (i = 0; i < page_size; i++) { |
| 218 | if (*dst != *src) { |
| 219 | rc = -1; |
| 220 | break; |
| 221 | } |
| 222 | dst++; |
| 223 | src++; |
| 224 | } |
| 225 | |
| 226 | if (rc) { |
| 227 | fprintf(stderr, " page %d failed!\n", |
| 228 | (unsigned int)(d - bios) / page_size); |
| 229 | } |
| 230 | |
| 231 | return rc; |
| 232 | } |
| 233 | |
| 234 | /* I simply erase block by block |
| 235 | * I Chip This is not the fastest way, but it works |
| 236 | */ |
| 237 | int erase_stm50flw0x0x(struct flashchip *flash) |
| 238 | { |
| 239 | int i,rc=0; |
| 240 | int total_size = flash->total_size * 1024; |
| 241 | int page_size = flash->page_size; |
| 242 | volatile uint8_t *bios = flash->virtual_memory; |
| 243 | |
| 244 | printf("Erasing page:\n"); |
| 245 | for (i = 0;(i < total_size / page_size) && (rc==0); i++) { |
| 246 | printf |
| 247 | ("\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"); |
| 248 | printf("%04d at address: 0x%08x ", i, i * page_size); |
| 249 | rc = unlock_block_stm50flw0x0x(flash, i * page_size); |
| 250 | if (!rc) rc = erase_block_stm50flw0x0x(flash, i * page_size); |
| 251 | } |
| 252 | printf("\n"); |
| 253 | protect_stm50flw0x0x(bios); |
| 254 | |
| 255 | return rc; |
| 256 | } |
| 257 | |
| 258 | int write_stm50flw0x0x(struct flashchip *flash, uint8_t * buf) |
| 259 | { |
| 260 | int i,rc=0; |
| 261 | int total_size = flash->total_size * 1024; |
| 262 | int page_size = flash->page_size; |
| 263 | volatile uint8_t *bios = flash->virtual_memory; |
| 264 | |
| 265 | printf("Programming page: \n"); |
| 266 | for (i = 0;(i < total_size / page_size) && (rc==0); i++) { |
| 267 | printf |
| 268 | ("\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"); |
| 269 | printf("%04d at address: 0x%08x ", i, i * page_size); |
| 270 | |
| 271 | /* Auto Skip Blocks, which already contain the desired data |
| 272 | * Faster, because we only write, what has changed |
| 273 | * More secure, because blocks, which are excluded |
| 274 | * (with the exclude or layout feature) |
| 275 | * are not erased and rewritten; data is retained also |
| 276 | * in sudden power off situations |
| 277 | */ |
| 278 | if (!memcmp((void *)(buf + i * page_size), |
| 279 | (void *)(bios + i * page_size), page_size)) { |
| 280 | printf("SKIPPED\n"); |
| 281 | continue; |
| 282 | } |
| 283 | |
| 284 | rc = unlock_block_stm50flw0x0x(flash, i * page_size); |
| 285 | if (!rc) rc = erase_block_stm50flw0x0x(flash, i * page_size); |
| 286 | if (!rc) write_page_stm50flw0x0x(bios, buf + i * page_size, |
| 287 | bios + i * page_size, page_size); |
| 288 | } |
| 289 | printf("\n"); |
| 290 | protect_stm50flw0x0x(bios); |
| 291 | |
| 292 | return rc; |
| 293 | } |