wdenk | affae2b | 2002-08-17 09:36:01 +0000 | [diff] [blame] | 1 | /* |
| 2 | * (C) Copyright 2000 |
| 3 | * Wolfgang Denk, DENX Software Engineering, wd@denx.de. |
| 4 | * |
| 5 | * See file CREDITS for list of people who contributed to this |
| 6 | * project. |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU General Public License as |
| 10 | * published by the Free Software Foundation; either version 2 of |
| 11 | * the License, or (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to the Free Software |
| 20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| 21 | * MA 02111-1307 USA |
| 22 | */ |
| 23 | |
| 24 | #include <common.h> |
| 25 | #include <mpc8xx.h> |
| 26 | |
| 27 | flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */ |
| 28 | |
| 29 | #if defined(CFG_ENV_IS_IN_FLASH) |
| 30 | # ifndef CFG_ENV_ADDR |
| 31 | # define CFG_ENV_ADDR (CFG_FLASH_BASE + CFG_ENV_OFFSET) |
| 32 | # endif |
| 33 | # ifndef CFG_ENV_SIZE |
| 34 | # define CFG_ENV_SIZE CFG_ENV_SECT_SIZE |
| 35 | # endif |
| 36 | # ifndef CFG_ENV_SECT_SIZE |
| 37 | # define CFG_ENV_SECT_SIZE CFG_ENV_SIZE |
| 38 | # endif |
| 39 | #endif |
| 40 | |
| 41 | /*----------------------------------------------------------------------- |
| 42 | * Functions |
| 43 | */ |
| 44 | static ulong flash_get_size (vu_long *addr, flash_info_t *info); |
| 45 | static int write_word (flash_info_t *info, ulong dest, ulong data); |
| 46 | static void flash_get_offsets (ulong base, flash_info_t *info); |
| 47 | |
| 48 | /*----------------------------------------------------------------------- |
| 49 | */ |
| 50 | |
| 51 | unsigned long flash_init (void) |
| 52 | { |
| 53 | volatile immap_t *immap = (immap_t *)CFG_IMMR; |
| 54 | volatile memctl8xx_t *memctl = &immap->im_memctl; |
| 55 | unsigned long total_size; |
| 56 | unsigned long size_b0, size_b1; |
| 57 | int i; |
| 58 | |
| 59 | /* Init: no FLASHes known */ |
| 60 | for (i=0; i < CFG_MAX_FLASH_BANKS; ++i) |
| 61 | { |
| 62 | flash_info[i].flash_id = FLASH_UNKNOWN; |
| 63 | } |
| 64 | |
| 65 | total_size = 0; |
| 66 | size_b0 = 0xffffffff; |
| 67 | |
| 68 | for (i=0; i < CFG_MAX_FLASH_BANKS; ++i) |
| 69 | { |
| 70 | size_b1 = flash_get_size((vu_long *)(CFG_FLASH_BASE + total_size), &flash_info[i]); |
| 71 | |
| 72 | if (flash_info[i].flash_id == FLASH_UNKNOWN) |
| 73 | { |
| 74 | printf ("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n", i, size_b1, size_b1>>20); |
| 75 | } |
| 76 | |
| 77 | /* Is this really needed ? - LP */ |
| 78 | if (size_b1 > size_b0) { |
| 79 | printf ("## ERROR: Bank %d (0x%08lx = %ld MB) > Bank %d (0x%08lx = %ld MB)\n", |
| 80 | i, size_b1, size_b1>>20, i-1, size_b0, size_b0>>20); |
| 81 | goto out_error; |
| 82 | } |
| 83 | size_b0 = size_b1; |
| 84 | total_size += size_b1; |
| 85 | } |
| 86 | |
| 87 | /* Compute the Address Mask */ |
| 88 | for (i=0; (total_size >> i) != 0; ++i) {}; |
| 89 | i--; |
| 90 | |
| 91 | if (total_size != (1 << i)) { |
| 92 | printf ("## WARNING: Total FLASH size (0x%08lx = %ld MB) is not a power of 2\n", |
| 93 | total_size, total_size>>20); |
| 94 | } |
| 95 | |
| 96 | /* Remap FLASH according to real size */ |
| 97 | memctl->memc_or0 = ((((unsigned long)~1) << i) & OR_AM_MSK) | CFG_OR_TIMING_FLASH; |
| 98 | memctl->memc_br0 = CFG_BR0_PRELIM; |
| 99 | |
| 100 | total_size = 0; |
| 101 | |
| 102 | for (i=0; i < CFG_MAX_FLASH_BANKS && flash_info[i].size != 0; ++i) |
| 103 | { |
| 104 | /* Re-do sizing to get full correct info */ |
| 105 | /* Why ? - LP */ |
| 106 | size_b1 = flash_get_size((vu_long *)(CFG_FLASH_BASE + total_size), &flash_info[i]); |
| 107 | |
| 108 | /* This is done by flash_get_size - LP */ |
| 109 | /* flash_get_offsets (CFG_FLASH_BASE + total_size, &flash_info[i]); */ |
| 110 | |
| 111 | #if CFG_MONITOR_BASE >= CFG_FLASH_BASE |
| 112 | /* monitor protection ON by default */ |
| 113 | flash_protect(FLAG_PROTECT_SET, |
| 114 | CFG_MONITOR_BASE, |
| 115 | CFG_MONITOR_BASE+CFG_MONITOR_LEN-1, |
| 116 | &flash_info[i]); |
| 117 | #endif |
| 118 | |
| 119 | #ifdef CFG_ENV_IS_IN_FLASH |
| 120 | /* ENV protection ON by default */ |
| 121 | flash_protect(FLAG_PROTECT_SET, |
| 122 | CFG_ENV_ADDR, |
| 123 | CFG_ENV_ADDR+CFG_ENV_SIZE-1, |
| 124 | &flash_info[i]); |
| 125 | #endif |
| 126 | |
| 127 | total_size += size_b1; |
| 128 | } |
| 129 | |
| 130 | return (total_size); |
| 131 | |
| 132 | out_error: |
| 133 | for (i=0; i < CFG_MAX_FLASH_BANKS; ++i) |
| 134 | { |
| 135 | flash_info[i].flash_id = FLASH_UNKNOWN; |
| 136 | flash_info[i].sector_count = -1; |
| 137 | flash_info[i].size = 0; |
| 138 | } |
| 139 | |
| 140 | return (0); |
| 141 | } |
| 142 | |
| 143 | /*----------------------------------------------------------------------- |
| 144 | */ |
| 145 | static void flash_get_offsets (ulong base, flash_info_t *info) |
| 146 | { |
| 147 | int i; |
| 148 | |
| 149 | /* set up sector start address table */ |
wdenk | bf2f8c9 | 2003-05-22 22:52:13 +0000 | [diff] [blame] | 150 | if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040 || (info->flash_id & FLASH_TYPEMASK) == FLASH_AM080 ) { |
wdenk | affae2b | 2002-08-17 09:36:01 +0000 | [diff] [blame] | 151 | /* set sector offsets for uniform sector type */ |
| 152 | for (i = 0; i < info->sector_count; i++) { |
| 153 | info->start[i] = base + (i * 0x00040000); |
| 154 | } |
| 155 | } |
| 156 | } |
| 157 | |
| 158 | /*----------------------------------------------------------------------- |
| 159 | */ |
| 160 | void flash_print_info (flash_info_t *info) |
| 161 | { |
| 162 | int i; |
| 163 | |
| 164 | if (info->flash_id == FLASH_UNKNOWN) |
| 165 | { |
| 166 | printf ("missing or unknown FLASH type\n"); |
| 167 | return; |
| 168 | } |
| 169 | |
| 170 | switch (info->flash_id & FLASH_VENDMASK) |
| 171 | { |
| 172 | case FLASH_MAN_AMD: printf ("AMD "); break; |
| 173 | case FLASH_MAN_FUJ: printf ("FUJITSU "); break; |
| 174 | case FLASH_MAN_BM: printf ("BRIGHT MICRO "); break; |
| 175 | default: printf ("Unknown Vendor "); break; |
| 176 | } |
| 177 | |
| 178 | switch (info->flash_id & FLASH_TYPEMASK) |
| 179 | { |
| 180 | case FLASH_AM040: printf ("29F040 or 29LV040 (4 Mbit, uniform sectors)\n"); |
| 181 | break; |
wdenk | bf2f8c9 | 2003-05-22 22:52:13 +0000 | [diff] [blame] | 182 | case FLASH_AM080: printf ("29F080 or 29LV080 (8 Mbit, uniform sectors)\n"); |
| 183 | break; |
wdenk | affae2b | 2002-08-17 09:36:01 +0000 | [diff] [blame] | 184 | case FLASH_AM400B: printf ("AM29LV400B (4 Mbit, bottom boot sect)\n"); |
| 185 | break; |
| 186 | case FLASH_AM400T: printf ("AM29LV400T (4 Mbit, top boot sector)\n"); |
| 187 | break; |
| 188 | case FLASH_AM800B: printf ("AM29LV800B (8 Mbit, bottom boot sect)\n"); |
| 189 | break; |
| 190 | case FLASH_AM800T: printf ("AM29LV800T (8 Mbit, top boot sector)\n"); |
| 191 | break; |
| 192 | case FLASH_AM160B: printf ("AM29LV160B (16 Mbit, bottom boot sect)\n"); |
| 193 | break; |
| 194 | case FLASH_AM160T: printf ("AM29LV160T (16 Mbit, top boot sector)\n"); |
| 195 | break; |
| 196 | case FLASH_AM320B: printf ("AM29LV320B (32 Mbit, bottom boot sect)\n"); |
| 197 | break; |
| 198 | case FLASH_AM320T: printf ("AM29LV320T (32 Mbit, top boot sector)\n"); |
| 199 | break; |
| 200 | default: printf ("Unknown Chip Type\n"); |
| 201 | break; |
| 202 | } |
| 203 | |
| 204 | printf (" Size: %ld MB in %d Sectors\n",info->size >> 20, info->sector_count); |
| 205 | |
| 206 | printf (" Sector Start Addresses:"); |
| 207 | |
| 208 | for (i=0; i<info->sector_count; ++i) |
| 209 | { |
| 210 | if ((i % 5) == 0) |
| 211 | { |
| 212 | printf ("\n "); |
| 213 | } |
| 214 | |
| 215 | printf (" %08lX%s", |
| 216 | info->start[i], |
| 217 | info->protect[i] ? " (RO)" : " "); |
| 218 | } |
| 219 | |
| 220 | printf ("\n"); |
| 221 | return; |
| 222 | } |
| 223 | |
| 224 | /*----------------------------------------------------------------------- |
| 225 | */ |
| 226 | |
| 227 | |
| 228 | /*----------------------------------------------------------------------- |
| 229 | */ |
| 230 | |
| 231 | /* |
| 232 | * The following code cannot be run from FLASH! |
| 233 | */ |
| 234 | |
| 235 | static ulong flash_get_size (vu_long *addr, flash_info_t *info) |
| 236 | { |
| 237 | short i; |
| 238 | #if 0 |
| 239 | ulong base = (ulong)addr; |
| 240 | #endif |
| 241 | uchar value; |
| 242 | |
| 243 | /* Write auto select command: read Manufacturer ID */ |
| 244 | #if 0 |
| 245 | addr[0x0555] = 0x00AA00AA; |
| 246 | addr[0x02AA] = 0x00550055; |
| 247 | addr[0x0555] = 0x00900090; |
| 248 | #else |
| 249 | addr[0x0555] = 0xAAAAAAAA; |
| 250 | addr[0x02AA] = 0x55555555; |
| 251 | addr[0x0555] = 0x90909090; |
| 252 | #endif |
| 253 | |
| 254 | value = addr[0]; |
| 255 | |
| 256 | switch (value + (value << 16)) |
| 257 | { |
| 258 | case AMD_MANUFACT: |
| 259 | info->flash_id = FLASH_MAN_AMD; |
| 260 | break; |
| 261 | |
| 262 | case FUJ_MANUFACT: |
| 263 | info->flash_id = FLASH_MAN_FUJ; |
| 264 | break; |
| 265 | |
| 266 | default: |
| 267 | info->flash_id = FLASH_UNKNOWN; |
| 268 | info->sector_count = 0; |
| 269 | info->size = 0; |
| 270 | break; |
| 271 | } |
| 272 | |
| 273 | value = addr[1]; /* device ID */ |
| 274 | |
| 275 | switch (value) |
| 276 | { |
| 277 | case AMD_ID_F040B: |
| 278 | info->flash_id += FLASH_AM040; |
| 279 | info->sector_count = 8; |
| 280 | info->size = 0x00200000; |
| 281 | break; /* => 2 MB */ |
| 282 | |
wdenk | bf2f8c9 | 2003-05-22 22:52:13 +0000 | [diff] [blame] | 283 | case AMD_ID_F080B: |
| 284 | info->flash_id += FLASH_AM080; |
| 285 | info->sector_count =16; |
| 286 | info->size = 0x00400000; |
| 287 | break; /* => 4 MB */ |
| 288 | |
wdenk | affae2b | 2002-08-17 09:36:01 +0000 | [diff] [blame] | 289 | case AMD_ID_LV400T: |
| 290 | info->flash_id += FLASH_AM400T; |
| 291 | info->sector_count = 11; |
| 292 | info->size = 0x00100000; |
| 293 | break; /* => 1 MB */ |
| 294 | |
| 295 | case AMD_ID_LV400B: |
| 296 | info->flash_id += FLASH_AM400B; |
| 297 | info->sector_count = 11; |
| 298 | info->size = 0x00100000; |
| 299 | break; /* => 1 MB */ |
| 300 | |
| 301 | case AMD_ID_LV800T: |
| 302 | info->flash_id += FLASH_AM800T; |
| 303 | info->sector_count = 19; |
| 304 | info->size = 0x00200000; |
| 305 | break; /* => 2 MB */ |
| 306 | |
| 307 | case AMD_ID_LV800B: |
| 308 | info->flash_id += FLASH_AM800B; |
| 309 | info->sector_count = 19; |
| 310 | info->size = 0x00200000; |
| 311 | break; /* => 2 MB */ |
| 312 | |
| 313 | case AMD_ID_LV160T: |
| 314 | info->flash_id += FLASH_AM160T; |
| 315 | info->sector_count = 35; |
| 316 | info->size = 0x00400000; |
| 317 | break; /* => 4 MB */ |
| 318 | |
| 319 | case AMD_ID_LV160B: |
| 320 | info->flash_id += FLASH_AM160B; |
| 321 | info->sector_count = 35; |
| 322 | info->size = 0x00400000; |
| 323 | break; /* => 4 MB */ |
| 324 | #if 0 /* enable when device IDs are available */ |
| 325 | case AMD_ID_LV320T: |
| 326 | info->flash_id += FLASH_AM320T; |
| 327 | info->sector_count = 67; |
| 328 | info->size = 0x00800000; |
| 329 | break; /* => 8 MB */ |
| 330 | |
| 331 | case AMD_ID_LV320B: |
| 332 | info->flash_id += FLASH_AM320B; |
| 333 | info->sector_count = 67; |
| 334 | info->size = 0x00800000; |
| 335 | break; /* => 8 MB */ |
| 336 | #endif |
| 337 | default: |
| 338 | info->flash_id = FLASH_UNKNOWN; |
| 339 | return (0); /* => no or unknown flash */ |
| 340 | |
| 341 | } |
| 342 | |
| 343 | #if 0 |
| 344 | /* set up sector start address table */ |
| 345 | if (info->flash_id & FLASH_BTYPE) { |
| 346 | /* set sector offsets for bottom boot block type */ |
| 347 | info->start[0] = base + 0x00000000; |
| 348 | info->start[1] = base + 0x00008000; |
| 349 | info->start[2] = base + 0x0000C000; |
| 350 | info->start[3] = base + 0x00010000; |
| 351 | for (i = 4; i < info->sector_count; i++) { |
| 352 | info->start[i] = base + (i * 0x00020000) - 0x00060000; |
| 353 | } |
| 354 | } else { |
| 355 | /* set sector offsets for top boot block type */ |
| 356 | i = info->sector_count - 1; |
| 357 | info->start[i--] = base + info->size - 0x00008000; |
| 358 | info->start[i--] = base + info->size - 0x0000C000; |
| 359 | info->start[i--] = base + info->size - 0x00010000; |
| 360 | for (; i >= 0; i--) { |
| 361 | info->start[i] = base + i * 0x00020000; |
| 362 | } |
| 363 | } |
| 364 | #else |
| 365 | flash_get_offsets ((ulong)addr, info); |
| 366 | #endif |
| 367 | |
| 368 | /* check for protected sectors */ |
| 369 | for (i = 0; i < info->sector_count; i++) |
| 370 | { |
| 371 | /* read sector protection at sector address, (A7 .. A0) = 0x02 */ |
| 372 | /* D0 = 1 if protected */ |
| 373 | addr = (volatile unsigned long *)(info->start[i]); |
| 374 | info->protect[i] = addr[2] & 1; |
| 375 | } |
| 376 | |
| 377 | /* |
| 378 | * Prevent writes to uninitialized FLASH. |
| 379 | */ |
| 380 | if (info->flash_id != FLASH_UNKNOWN) |
| 381 | { |
| 382 | addr = (volatile unsigned long *)info->start[0]; |
| 383 | #if 0 |
| 384 | *addr = 0x00F000F0; /* reset bank */ |
| 385 | #else |
| 386 | *addr = 0xF0F0F0F0; /* reset bank */ |
| 387 | #endif |
| 388 | } |
| 389 | |
| 390 | return (info->size); |
| 391 | } |
| 392 | |
| 393 | |
| 394 | /*----------------------------------------------------------------------- |
| 395 | */ |
| 396 | |
| 397 | int flash_erase (flash_info_t *info, int s_first, int s_last) |
| 398 | { |
| 399 | vu_long *addr = (vu_long*)(info->start[0]); |
| 400 | int flag, prot, sect, l_sect; |
| 401 | ulong start, now, last; |
| 402 | |
| 403 | if ((s_first < 0) || (s_first > s_last)) { |
| 404 | if (info->flash_id == FLASH_UNKNOWN) { |
| 405 | printf ("- missing\n"); |
| 406 | } else { |
| 407 | printf ("- no sectors to erase\n"); |
| 408 | } |
| 409 | return 1; |
| 410 | } |
| 411 | |
| 412 | if ((info->flash_id == FLASH_UNKNOWN) || |
| 413 | (info->flash_id > FLASH_AMD_COMP)) { |
| 414 | printf ("Can't erase unknown flash type - aborted\n"); |
| 415 | return 1; |
| 416 | } |
| 417 | |
| 418 | prot = 0; |
| 419 | for (sect=s_first; sect<=s_last; ++sect) { |
| 420 | if (info->protect[sect]) { |
| 421 | prot++; |
| 422 | } |
| 423 | } |
| 424 | |
| 425 | if (prot) { |
| 426 | printf ("- Warning: %d protected sectors will not be erased!\n", |
| 427 | prot); |
| 428 | } else { |
| 429 | printf ("\n"); |
| 430 | } |
| 431 | |
| 432 | l_sect = -1; |
| 433 | |
| 434 | /* Disable interrupts which might cause a timeout here */ |
| 435 | flag = disable_interrupts(); |
| 436 | |
| 437 | #if 0 |
| 438 | addr[0x0555] = 0x00AA00AA; |
| 439 | addr[0x02AA] = 0x00550055; |
| 440 | addr[0x0555] = 0x00800080; |
| 441 | addr[0x0555] = 0x00AA00AA; |
| 442 | addr[0x02AA] = 0x00550055; |
| 443 | #else |
| 444 | addr[0x0555] = 0xAAAAAAAA; |
| 445 | addr[0x02AA] = 0x55555555; |
| 446 | addr[0x0555] = 0x80808080; |
| 447 | addr[0x0555] = 0xAAAAAAAA; |
| 448 | addr[0x02AA] = 0x55555555; |
| 449 | #endif |
| 450 | |
| 451 | /* Start erase on unprotected sectors */ |
| 452 | for (sect = s_first; sect<=s_last; sect++) { |
| 453 | if (info->protect[sect] == 0) { /* not protected */ |
| 454 | addr = (vu_long*)(info->start[sect]); |
| 455 | #if 0 |
| 456 | addr[0] = 0x00300030; |
| 457 | #else |
| 458 | addr[0] = 0x30303030; |
| 459 | #endif |
| 460 | l_sect = sect; |
| 461 | } |
| 462 | } |
| 463 | |
| 464 | /* re-enable interrupts if necessary */ |
| 465 | if (flag) |
| 466 | enable_interrupts(); |
| 467 | |
| 468 | /* wait at least 80us - let's wait 1 ms */ |
| 469 | udelay (1000); |
| 470 | |
| 471 | /* |
| 472 | * We wait for the last triggered sector |
| 473 | */ |
| 474 | if (l_sect < 0) |
| 475 | goto DONE; |
| 476 | |
| 477 | start = get_timer (0); |
| 478 | last = start; |
| 479 | addr = (vu_long*)(info->start[l_sect]); |
| 480 | #if 0 |
| 481 | while ((addr[0] & 0x00800080) != 0x00800080) |
| 482 | #else |
| 483 | while ((addr[0] & 0xFFFFFFFF) != 0xFFFFFFFF) |
| 484 | #endif |
| 485 | { |
| 486 | if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) { |
| 487 | printf ("Timeout\n"); |
| 488 | return 1; |
| 489 | } |
| 490 | /* show that we're waiting */ |
| 491 | if ((now - last) > 1000) { /* every second */ |
| 492 | putc ('.'); |
| 493 | last = now; |
| 494 | } |
| 495 | } |
| 496 | |
| 497 | DONE: |
| 498 | /* reset to read mode */ |
| 499 | addr = (volatile unsigned long *)info->start[0]; |
| 500 | #if 0 |
| 501 | addr[0] = 0x00F000F0; /* reset bank */ |
| 502 | #else |
| 503 | addr[0] = 0xF0F0F0F0; /* reset bank */ |
| 504 | #endif |
| 505 | |
| 506 | printf (" done\n"); |
| 507 | return 0; |
| 508 | } |
| 509 | |
| 510 | /*----------------------------------------------------------------------- |
| 511 | * Copy memory to flash, returns: |
| 512 | * 0 - OK |
| 513 | * 1 - write timeout |
| 514 | * 2 - Flash not erased |
| 515 | */ |
| 516 | |
| 517 | int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt) |
| 518 | { |
| 519 | ulong cp, wp, data; |
| 520 | int i, l, rc; |
| 521 | |
| 522 | wp = (addr & ~3); /* get lower word aligned address */ |
| 523 | |
| 524 | /* |
| 525 | * handle unaligned start bytes |
| 526 | */ |
| 527 | if ((l = addr - wp) != 0) { |
| 528 | data = 0; |
| 529 | for (i=0, cp=wp; i<l; ++i, ++cp) { |
| 530 | data = (data << 8) | (*(uchar *)cp); |
| 531 | } |
| 532 | for (; i<4 && cnt>0; ++i) { |
| 533 | data = (data << 8) | *src++; |
| 534 | --cnt; |
| 535 | ++cp; |
| 536 | } |
| 537 | for (; cnt==0 && i<4; ++i, ++cp) { |
| 538 | data = (data << 8) | (*(uchar *)cp); |
| 539 | } |
| 540 | |
| 541 | if ((rc = write_word(info, wp, data)) != 0) { |
| 542 | return (rc); |
| 543 | } |
| 544 | wp += 4; |
| 545 | } |
| 546 | |
| 547 | /* |
| 548 | * handle word aligned part |
| 549 | */ |
| 550 | while (cnt >= 4) { |
| 551 | data = 0; |
| 552 | for (i=0; i<4; ++i) { |
| 553 | data = (data << 8) | *src++; |
| 554 | } |
| 555 | if ((rc = write_word(info, wp, data)) != 0) { |
| 556 | return (rc); |
| 557 | } |
| 558 | wp += 4; |
| 559 | cnt -= 4; |
| 560 | } |
| 561 | |
| 562 | if (cnt == 0) { |
| 563 | return (0); |
| 564 | } |
| 565 | |
| 566 | /* |
| 567 | * handle unaligned tail bytes |
| 568 | */ |
| 569 | data = 0; |
| 570 | for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) { |
| 571 | data = (data << 8) | *src++; |
| 572 | --cnt; |
| 573 | } |
| 574 | for (; i<4; ++i, ++cp) { |
| 575 | data = (data << 8) | (*(uchar *)cp); |
| 576 | } |
| 577 | |
| 578 | return (write_word(info, wp, data)); |
| 579 | } |
| 580 | |
| 581 | /*----------------------------------------------------------------------- |
| 582 | * Write a word to Flash, returns: |
| 583 | * 0 - OK |
| 584 | * 1 - write timeout |
| 585 | * 2 - Flash not erased |
| 586 | */ |
| 587 | static int write_word (flash_info_t *info, ulong dest, ulong data) |
| 588 | { |
| 589 | vu_long *addr = (vu_long*)(info->start[0]); |
| 590 | ulong start; |
| 591 | int flag; |
| 592 | |
| 593 | /* Check if Flash is (sufficiently) erased */ |
| 594 | if ((*((vu_long *)dest) & data) != data) { |
| 595 | return (2); |
| 596 | } |
| 597 | /* Disable interrupts which might cause a timeout here */ |
| 598 | flag = disable_interrupts(); |
| 599 | |
| 600 | #if 0 |
| 601 | addr[0x0555] = 0x00AA00AA; |
| 602 | addr[0x02AA] = 0x00550055; |
| 603 | addr[0x0555] = 0x00A000A0; |
| 604 | #else |
| 605 | addr[0x0555] = 0xAAAAAAAA; |
| 606 | addr[0x02AA] = 0x55555555; |
| 607 | addr[0x0555] = 0xA0A0A0A0; |
| 608 | #endif |
| 609 | |
| 610 | *((vu_long *)dest) = data; |
| 611 | |
| 612 | /* re-enable interrupts if necessary */ |
| 613 | if (flag) |
| 614 | enable_interrupts(); |
| 615 | |
| 616 | /* data polling for D7 */ |
| 617 | start = get_timer (0); |
| 618 | #if 0 |
| 619 | while ((*((vu_long *)dest) & 0x00800080) != (data & 0x00800080)) |
| 620 | #else |
| 621 | while ((*((vu_long *)dest) & 0x80808080) != (data & 0x80808080)) |
| 622 | #endif |
| 623 | { |
| 624 | if (get_timer(start) > CFG_FLASH_WRITE_TOUT) { |
| 625 | return (1); |
| 626 | } |
| 627 | } |
| 628 | return (0); |
| 629 | } |
| 630 | |
| 631 | /*----------------------------------------------------------------------- |
| 632 | */ |