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_data (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 size_b0; |
| 56 | int i; |
| 57 | |
| 58 | /* Init: no FLASHes known */ |
| 59 | for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) { |
| 60 | flash_info[i].flash_id = FLASH_UNKNOWN; |
| 61 | } |
| 62 | |
| 63 | /* Static FLASH Bank configuration here - FIXME XXX */ |
| 64 | |
| 65 | size_b0 = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]); |
| 66 | |
| 67 | if (flash_info[0].flash_id == FLASH_UNKNOWN) { |
| 68 | printf ("## Unknown FLASH on Bank 0: " |
| 69 | "ID 0x%lx, Size = 0x%08lx = %ld MB\n", |
| 70 | flash_info[0].flash_id, |
| 71 | size_b0, size_b0<<20); |
| 72 | } |
| 73 | |
| 74 | /* Remap FLASH according to real size */ |
| 75 | memctl->memc_or0 = CFG_OR_TIMING_FLASH | (-size_b0 & 0xFFFF8000); |
| 76 | memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) | \ |
| 77 | BR_MS_GPCM | BR_PS_16 | BR_V; |
| 78 | |
| 79 | /* Re-do sizing to get full correct info */ |
| 80 | size_b0 = flash_get_size((vu_long *)CFG_FLASH_BASE, &flash_info[0]); |
| 81 | |
| 82 | flash_get_offsets (CFG_FLASH_BASE, &flash_info[0]); |
| 83 | |
| 84 | flash_info[0].size = size_b0; |
| 85 | |
| 86 | #if CFG_MONITOR_BASE >= CFG_FLASH_BASE |
| 87 | /* monitor protection ON by default */ |
| 88 | flash_protect(FLAG_PROTECT_SET, |
| 89 | CFG_MONITOR_BASE, |
wdenk | 3b57fe0 | 2003-05-30 12:48:29 +0000 | [diff] [blame] | 90 | CFG_MONITOR_BASE+monitor_flash_len-1, |
wdenk | affae2b | 2002-08-17 09:36:01 +0000 | [diff] [blame] | 91 | &flash_info[0]); |
| 92 | #endif |
| 93 | |
| 94 | #ifdef CFG_ENV_IS_IN_FLASH |
| 95 | /* ENV protection ON by default */ |
| 96 | flash_protect(FLAG_PROTECT_SET, |
| 97 | CFG_ENV_ADDR, |
| 98 | CFG_ENV_ADDR+CFG_ENV_SECT_SIZE-1, |
| 99 | &flash_info[0]); |
| 100 | #endif |
| 101 | |
| 102 | return (size_b0); |
| 103 | } |
| 104 | |
| 105 | /*----------------------------------------------------------------------- |
| 106 | */ |
| 107 | static void flash_get_offsets (ulong base, flash_info_t *info) |
| 108 | { |
| 109 | int i; |
| 110 | |
| 111 | if (info->flash_id == FLASH_UNKNOWN) { |
| 112 | return; |
| 113 | } |
| 114 | |
| 115 | switch (info->flash_id & FLASH_VENDMASK) { |
| 116 | case FLASH_MAN_MT: |
| 117 | if (info->flash_id & FLASH_BTYPE) { |
| 118 | /* set sector offsets for bottom boot block type */ |
| 119 | info->start[0] = base + 0x00000000; |
| 120 | info->start[1] = base + 0x00004000; |
| 121 | info->start[2] = base + 0x00006000; |
| 122 | info->start[3] = base + 0x00008000; |
| 123 | for (i = 4; i < info->sector_count; i++) { |
| 124 | info->start[i] = base + ((i-3) * 0x00020000); |
| 125 | } |
| 126 | } else { |
| 127 | /* set sector offsets for top boot block type */ |
| 128 | i = info->sector_count - 1; |
| 129 | info->start[i--] = base + info->size - 0x00004000; |
| 130 | info->start[i--] = base + info->size - 0x00006000; |
| 131 | info->start[i--] = base + info->size - 0x00008000; |
| 132 | for (; i >= 0; i--) { |
| 133 | info->start[i] = base + i * 0x00020000; |
| 134 | } |
| 135 | } |
| 136 | return; |
| 137 | |
| 138 | case FLASH_MAN_SST: |
| 139 | for (i = 0; i < info->sector_count; i++) { |
| 140 | info->start[i] = base + (i * 0x00002000); |
| 141 | } |
| 142 | return; |
| 143 | |
| 144 | case FLASH_MAN_AMD: |
| 145 | case FLASH_MAN_FUJ: |
| 146 | |
| 147 | /* set up sector start address table */ |
| 148 | if (info->flash_id & FLASH_BTYPE) { |
| 149 | /* set sector offsets for bottom boot block type */ |
| 150 | info->start[0] = base + 0x00000000; |
| 151 | info->start[1] = base + 0x00008000; |
| 152 | info->start[2] = base + 0x0000C000; |
| 153 | info->start[3] = base + 0x00010000; |
| 154 | for (i = 4; i < info->sector_count; i++) { |
| 155 | info->start[i] = base + (i * 0x00020000) - 0x00060000; |
| 156 | } |
| 157 | } else { |
| 158 | /* set sector offsets for top boot block type */ |
| 159 | i = info->sector_count - 1; |
| 160 | info->start[i--] = base + info->size - 0x00008000; |
| 161 | info->start[i--] = base + info->size - 0x0000C000; |
| 162 | info->start[i--] = base + info->size - 0x00010000; |
| 163 | for (; i >= 0; i--) { |
| 164 | info->start[i] = base + i * 0x00020000; |
| 165 | } |
| 166 | } |
| 167 | return; |
| 168 | default: |
| 169 | printf ("Don't know sector ofsets for flash type 0x%lx\n", |
| 170 | info->flash_id); |
| 171 | return; |
| 172 | } |
| 173 | } |
| 174 | |
| 175 | /*----------------------------------------------------------------------- |
| 176 | */ |
| 177 | void flash_print_info (flash_info_t *info) |
| 178 | { |
| 179 | int i; |
| 180 | |
| 181 | if (info->flash_id == FLASH_UNKNOWN) { |
| 182 | printf ("missing or unknown FLASH type\n"); |
| 183 | return; |
| 184 | } |
| 185 | |
| 186 | switch (info->flash_id & FLASH_VENDMASK) { |
| 187 | case FLASH_MAN_AMD: printf ("AMD "); break; |
| 188 | case FLASH_MAN_FUJ: printf ("Fujitsu "); break; |
| 189 | case FLASH_MAN_SST: printf ("SST "); break; |
| 190 | case FLASH_MAN_STM: printf ("STM "); break; |
| 191 | case FLASH_MAN_MT: printf ("MT "); break; |
| 192 | case FLASH_MAN_INTEL: printf ("Intel "); break; |
| 193 | default: printf ("Unknown Vendor "); break; |
| 194 | } |
| 195 | |
| 196 | switch (info->flash_id & FLASH_TYPEMASK) { |
| 197 | case FLASH_AM400B: printf ("AM29LV400B (4 Mbit, bottom boot sect)\n"); |
| 198 | break; |
| 199 | case FLASH_AM400T: printf ("AM29LV400T (4 Mbit, top boot sector)\n"); |
| 200 | break; |
| 201 | case FLASH_AM800B: printf ("AM29LV800B (8 Mbit, bottom boot sect)\n"); |
| 202 | break; |
| 203 | case FLASH_AM800T: printf ("AM29LV800T (8 Mbit, top boot sector)\n"); |
| 204 | break; |
| 205 | case FLASH_AM160B: printf ("AM29LV160B (16 Mbit, bottom boot sect)\n"); |
| 206 | break; |
| 207 | case FLASH_AM160T: printf ("AM29LV160T (16 Mbit, top boot sector)\n"); |
| 208 | break; |
| 209 | case FLASH_AM320B: printf ("AM29LV320B (32 Mbit, bottom boot sect)\n"); |
| 210 | break; |
| 211 | case FLASH_AM320T: printf ("AM29LV320T (32 Mbit, top boot sector)\n"); |
| 212 | break; |
| 213 | case FLASH_SST200A: printf ("39xF200A (2M = 128K x 16)\n"); |
| 214 | break; |
| 215 | case FLASH_SST400A: printf ("39xF400A (4M = 256K x 16)\n"); |
| 216 | break; |
| 217 | case FLASH_SST800A: printf ("39xF800A (8M = 512K x 16)\n"); |
| 218 | break; |
| 219 | case FLASH_STM800AB: printf ("M29W800AB (8M = 512K x 16)\n"); |
| 220 | break; |
| 221 | case FLASH_28F008S5: printf ("28F008S5 (1M = 64K x 16)\n"); |
| 222 | break; |
| 223 | case FLASH_28F400_T: printf ("28F400B3 (4Mbit, top boot sector)\n"); |
| 224 | break; |
| 225 | case FLASH_28F400_B: printf ("28F400B3 (4Mbit, bottom boot sector)\n"); |
| 226 | break; |
| 227 | default: printf ("Unknown Chip Type\n"); |
| 228 | break; |
| 229 | } |
| 230 | |
| 231 | if (info->size >= (1 << 20)) { |
| 232 | i = 20; |
| 233 | } else { |
| 234 | i = 10; |
| 235 | } |
| 236 | printf (" Size: %ld %cB in %d Sectors\n", |
| 237 | info->size >> i, |
| 238 | (i == 20) ? 'M' : 'k', |
| 239 | info->sector_count); |
| 240 | |
| 241 | printf (" Sector Start Addresses:"); |
| 242 | for (i=0; i<info->sector_count; ++i) { |
| 243 | if ((i % 5) == 0) |
| 244 | printf ("\n "); |
| 245 | printf (" %08lX%s", |
| 246 | info->start[i], |
| 247 | info->protect[i] ? " (RO)" : " " |
| 248 | ); |
| 249 | } |
| 250 | printf ("\n"); |
| 251 | return; |
| 252 | } |
| 253 | |
| 254 | /*----------------------------------------------------------------------- |
| 255 | */ |
| 256 | |
| 257 | |
| 258 | /*----------------------------------------------------------------------- |
| 259 | */ |
| 260 | |
| 261 | /* |
| 262 | * The following code cannot be run from FLASH! |
| 263 | */ |
| 264 | |
| 265 | static ulong flash_get_size (vu_long *addr, flash_info_t *info) |
| 266 | { |
| 267 | ushort value; |
| 268 | vu_short *saddr = (vu_short *)addr; |
| 269 | |
| 270 | /* Read Manufacturer ID */ |
| 271 | saddr[0] = 0x0090; |
| 272 | value = saddr[0]; |
| 273 | |
| 274 | switch (value) { |
| 275 | case (AMD_MANUFACT & 0xFFFF): |
| 276 | info->flash_id = FLASH_MAN_AMD; |
| 277 | break; |
| 278 | case (FUJ_MANUFACT & 0xFFFF): |
| 279 | info->flash_id = FLASH_MAN_FUJ; |
| 280 | break; |
| 281 | case (SST_MANUFACT & 0xFFFF): |
| 282 | info->flash_id = FLASH_MAN_SST; |
| 283 | break; |
| 284 | case (STM_MANUFACT & 0xFFFF): |
| 285 | info->flash_id = FLASH_MAN_STM; |
| 286 | break; |
| 287 | case (MT_MANUFACT & 0xFFFF): |
| 288 | info->flash_id = FLASH_MAN_MT; |
| 289 | break; |
| 290 | default: |
| 291 | info->flash_id = FLASH_UNKNOWN; |
| 292 | info->sector_count = 0; |
| 293 | info->size = 0; |
| 294 | saddr[0] = 0x00FF; /* restore read mode */ |
| 295 | return (0); /* no or unknown flash */ |
| 296 | } |
| 297 | |
| 298 | value = saddr[1]; /* device ID */ |
| 299 | |
| 300 | switch (value) { |
| 301 | case (AMD_ID_LV400T & 0xFFFF): |
| 302 | info->flash_id += FLASH_AM400T; |
| 303 | info->sector_count = 11; |
| 304 | info->size = 0x00100000; |
| 305 | break; /* => 1 MB */ |
| 306 | |
| 307 | case (AMD_ID_LV400B & 0xFFFF): |
| 308 | info->flash_id += FLASH_AM400B; |
| 309 | info->sector_count = 11; |
| 310 | info->size = 0x00100000; |
| 311 | break; /* => 1 MB */ |
| 312 | |
| 313 | case (AMD_ID_LV800T & 0xFFFF): |
| 314 | info->flash_id += FLASH_AM800T; |
| 315 | info->sector_count = 19; |
| 316 | info->size = 0x00200000; |
| 317 | break; /* => 2 MB */ |
| 318 | |
| 319 | case (AMD_ID_LV800B & 0xFFFF): |
| 320 | info->flash_id += FLASH_AM800B; |
| 321 | info->sector_count = 19; |
| 322 | info->size = 0x00200000; |
| 323 | break; /* => 2 MB */ |
| 324 | |
| 325 | case (AMD_ID_LV160T & 0xFFFF): |
| 326 | info->flash_id += FLASH_AM160T; |
| 327 | info->sector_count = 35; |
| 328 | info->size = 0x00400000; |
| 329 | break; /* => 4 MB */ |
| 330 | |
| 331 | case (AMD_ID_LV160B & 0xFFFF): |
| 332 | info->flash_id += FLASH_AM160B; |
| 333 | info->sector_count = 35; |
| 334 | info->size = 0x00400000; |
| 335 | break; /* => 4 MB */ |
| 336 | #if 0 /* enable when device IDs are available */ |
| 337 | case (AMD_ID_LV320T & 0xFFFF): |
| 338 | info->flash_id += FLASH_AM320T; |
| 339 | info->sector_count = 67; |
| 340 | info->size = 0x00800000; |
| 341 | break; /* => 8 MB */ |
| 342 | |
| 343 | case (AMD_ID_LV320B & 0xFFFF): |
| 344 | info->flash_id += FLASH_AM320B; |
| 345 | info->sector_count = 67; |
| 346 | info->size = 0x00800000; |
| 347 | break; /* => 8 MB */ |
| 348 | #endif |
| 349 | case (SST_ID_xF200A & 0xFFFF): |
| 350 | info->flash_id += FLASH_SST200A; |
| 351 | info->sector_count = 64; /* 39xF200A ID ( 2M = 128K x 16 ) */ |
| 352 | info->size = 0x00080000; |
| 353 | break; |
| 354 | case (SST_ID_xF400A & 0xFFFF): |
| 355 | info->flash_id += FLASH_SST400A; |
| 356 | info->sector_count = 128; /* 39xF400A ID ( 4M = 256K x 16 ) */ |
| 357 | info->size = 0x00100000; |
| 358 | break; |
| 359 | case (SST_ID_xF800A & 0xFFFF): |
| 360 | info->flash_id += FLASH_SST800A; |
| 361 | info->sector_count = 256; /* 39xF800A ID ( 8M = 512K x 16 ) */ |
| 362 | info->size = 0x00200000; |
| 363 | break; /* => 2 MB */ |
| 364 | case (STM_ID_x800AB & 0xFFFF): |
| 365 | info->flash_id += FLASH_STM800AB; |
| 366 | info->sector_count = 19; |
| 367 | info->size = 0x00200000; |
| 368 | break; /* => 2 MB */ |
| 369 | case (MT_ID_28F400_T & 0xFFFF): |
| 370 | info->flash_id += FLASH_28F400_T; |
| 371 | info->sector_count = 7; |
| 372 | info->size = 0x00080000; |
| 373 | break; /* => 512 kB */ |
| 374 | case (MT_ID_28F400_B & 0xFFFF): |
| 375 | info->flash_id += FLASH_28F400_B; |
| 376 | info->sector_count = 7; |
| 377 | info->size = 0x00080000; |
| 378 | break; /* => 512 kB */ |
| 379 | default: |
| 380 | info->flash_id = FLASH_UNKNOWN; |
| 381 | saddr[0] = 0x00FF; /* restore read mode */ |
| 382 | return (0); /* => no or unknown flash */ |
| 383 | |
| 384 | } |
| 385 | |
| 386 | if (info->sector_count > CFG_MAX_FLASH_SECT) { |
| 387 | printf ("** ERROR: sector count %d > max (%d) **\n", |
| 388 | info->sector_count, CFG_MAX_FLASH_SECT); |
| 389 | info->sector_count = CFG_MAX_FLASH_SECT; |
| 390 | } |
| 391 | |
| 392 | saddr[0] = 0x00FF; /* restore read mode */ |
| 393 | |
| 394 | return (info->size); |
| 395 | } |
| 396 | |
| 397 | |
| 398 | /*----------------------------------------------------------------------- |
| 399 | */ |
| 400 | |
| 401 | int flash_erase (flash_info_t *info, int s_first, int s_last) |
| 402 | { |
| 403 | int flag, prot, sect; |
| 404 | ulong start, now, last; |
| 405 | |
| 406 | if ((s_first < 0) || (s_first > s_last)) { |
| 407 | if (info->flash_id == FLASH_UNKNOWN) { |
| 408 | printf ("- missing\n"); |
| 409 | } else { |
| 410 | printf ("- no sectors to erase\n"); |
| 411 | } |
| 412 | return 1; |
| 413 | } |
| 414 | |
| 415 | if ((info->flash_id & FLASH_VENDMASK) != FLASH_MAN_MT) { |
| 416 | printf ("Can erase only MT flash types - aborted\n"); |
| 417 | return 1; |
| 418 | } |
| 419 | |
| 420 | prot = 0; |
| 421 | for (sect=s_first; sect<=s_last; ++sect) { |
| 422 | if (info->protect[sect]) { |
| 423 | prot++; |
| 424 | } |
| 425 | } |
| 426 | |
| 427 | if (prot) { |
| 428 | printf ("- Warning: %d protected sectors will not be erased!\n", |
| 429 | prot); |
| 430 | } else { |
| 431 | printf ("\n"); |
| 432 | } |
| 433 | |
| 434 | start = get_timer (0); |
| 435 | last = start; |
| 436 | /* Start erase on unprotected sectors */ |
| 437 | for (sect = s_first; sect<=s_last; sect++) { |
| 438 | if (info->protect[sect] == 0) { /* not protected */ |
| 439 | vu_short *addr = (vu_short *)(info->start[sect]); |
| 440 | unsigned short status; |
| 441 | |
| 442 | /* Disable interrupts which might cause a timeout here */ |
| 443 | flag = disable_interrupts(); |
| 444 | |
| 445 | *addr = 0x0050; /* clear status register */ |
| 446 | *addr = 0x0020; /* erase setup */ |
| 447 | *addr = 0x00D0; /* erase confirm */ |
| 448 | |
| 449 | /* re-enable interrupts if necessary */ |
| 450 | if (flag) |
| 451 | enable_interrupts(); |
| 452 | |
| 453 | /* wait at least 80us - let's wait 1 ms */ |
| 454 | udelay (1000); |
| 455 | |
| 456 | while (((status = *addr) & 0x0080) != 0x0080) { |
| 457 | if ((now=get_timer(start)) > CFG_FLASH_ERASE_TOUT) { |
| 458 | printf ("Timeout\n"); |
| 459 | *addr = 0x00FF; /* reset to read mode */ |
| 460 | return 1; |
| 461 | } |
| 462 | |
| 463 | /* show that we're waiting */ |
| 464 | if ((now - last) > 1000) { /* every second */ |
| 465 | putc ('.'); |
| 466 | last = now; |
| 467 | } |
| 468 | } |
| 469 | |
| 470 | *addr = 0x00FF; /* reset to read mode */ |
| 471 | } |
| 472 | } |
| 473 | printf (" done\n"); |
| 474 | return 0; |
| 475 | } |
| 476 | |
| 477 | /*----------------------------------------------------------------------- |
| 478 | * Copy memory to flash, returns: |
| 479 | * 0 - OK |
| 480 | * 1 - write timeout |
| 481 | * 2 - Flash not erased |
| 482 | * 4 - Flash not identified |
| 483 | */ |
| 484 | |
| 485 | #define FLASH_WIDTH 2 /* flash bus width in bytes */ |
| 486 | |
| 487 | int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt) |
| 488 | { |
| 489 | ulong cp, wp, data; |
| 490 | int i, l, rc; |
| 491 | |
| 492 | if (info->flash_id == FLASH_UNKNOWN) { |
| 493 | return 4; |
| 494 | } |
| 495 | |
| 496 | wp = (addr & ~(FLASH_WIDTH-1)); /* get lower FLASH_WIDTH aligned address */ |
| 497 | |
| 498 | /* |
| 499 | * handle unaligned start bytes |
| 500 | */ |
| 501 | if ((l = addr - wp) != 0) { |
| 502 | data = 0; |
| 503 | for (i=0, cp=wp; i<l; ++i, ++cp) { |
| 504 | data = (data << 8) | (*(uchar *)cp); |
| 505 | } |
| 506 | for (; i<FLASH_WIDTH && cnt>0; ++i) { |
| 507 | data = (data << 8) | *src++; |
| 508 | --cnt; |
| 509 | ++cp; |
| 510 | } |
| 511 | for (; cnt==0 && i<FLASH_WIDTH; ++i, ++cp) { |
| 512 | data = (data << 8) | (*(uchar *)cp); |
| 513 | } |
| 514 | |
| 515 | if ((rc = write_data(info, wp, data)) != 0) { |
| 516 | return (rc); |
| 517 | } |
| 518 | wp += FLASH_WIDTH; |
| 519 | } |
| 520 | |
| 521 | /* |
| 522 | * handle FLASH_WIDTH aligned part |
| 523 | */ |
| 524 | while (cnt >= FLASH_WIDTH) { |
| 525 | data = 0; |
| 526 | for (i=0; i<FLASH_WIDTH; ++i) { |
| 527 | data = (data << 8) | *src++; |
| 528 | } |
| 529 | if ((rc = write_data(info, wp, data)) != 0) { |
| 530 | return (rc); |
| 531 | } |
| 532 | wp += FLASH_WIDTH; |
| 533 | cnt -= FLASH_WIDTH; |
| 534 | } |
| 535 | |
| 536 | if (cnt == 0) { |
| 537 | return (0); |
| 538 | } |
| 539 | |
| 540 | /* |
| 541 | * handle unaligned tail bytes |
| 542 | */ |
| 543 | data = 0; |
| 544 | for (i=0, cp=wp; i<FLASH_WIDTH && cnt>0; ++i, ++cp) { |
| 545 | data = (data << 8) | *src++; |
| 546 | --cnt; |
| 547 | } |
| 548 | for (; i<FLASH_WIDTH; ++i, ++cp) { |
| 549 | data = (data << 8) | (*(uchar *)cp); |
| 550 | } |
| 551 | |
| 552 | return (write_data(info, wp, data)); |
| 553 | } |
| 554 | |
| 555 | /*----------------------------------------------------------------------- |
| 556 | * Write a word to Flash, returns: |
| 557 | * 0 - OK |
| 558 | * 1 - write timeout |
| 559 | * 2 - Flash not erased |
| 560 | */ |
| 561 | static int write_data (flash_info_t *info, ulong dest, ulong data) |
| 562 | { |
| 563 | vu_short *addr = (vu_short *)dest; |
| 564 | ushort sdata = (ushort)data; |
| 565 | ushort status; |
| 566 | ulong start; |
| 567 | int flag; |
| 568 | |
| 569 | /* Check if Flash is (sufficiently) erased */ |
| 570 | if ((*addr & sdata) != sdata) { |
| 571 | return (2); |
| 572 | } |
| 573 | /* Disable interrupts which might cause a timeout here */ |
| 574 | flag = disable_interrupts(); |
| 575 | |
| 576 | *addr = 0x0040; /* write setup */ |
| 577 | *addr = sdata; |
| 578 | |
| 579 | /* re-enable interrupts if necessary */ |
| 580 | if (flag) |
| 581 | enable_interrupts(); |
| 582 | |
| 583 | start = get_timer (0); |
| 584 | |
| 585 | while (((status = *addr) & 0x0080) != 0x0080) { |
| 586 | if (get_timer(start) > CFG_FLASH_WRITE_TOUT) { |
| 587 | *addr = 0x00FF; /* restore read mode */ |
| 588 | return (1); |
| 589 | } |
| 590 | } |
| 591 | |
| 592 | *addr = 0x00FF; /* restore read mode */ |
| 593 | |
| 594 | return (0); |
| 595 | } |
| 596 | |
| 597 | /*----------------------------------------------------------------------- |
| 598 | */ |