board/w7o/flash.c

   1 /*
   2  * (C) Copyright 2001
   3  * Erik Theisen, Wave 7 Optics, etheisen@mindspring.com.
   4  *  Based on code by:
   5  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   6  *
   7  * SPDX-License-Identifier:     GPL-2.0+
   8  */
   9
  10 #include <common.h>
  11 #include <asm/ppc4xx.h>
  12 #include <asm/processor.h>
  13
  14 #include <watchdog.h>
  15
  16 /* info for FLASH chips    */
  17 flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
  18
  19 /*
  20  * Functions
  21  */
  22 static ulong flash_get_size(vu_long *addr, flash_info_t *info);
  23 static int write_word8(flash_info_t *info, ulong dest, ulong data);
  24 static int write_word32(flash_info_t *info, ulong dest, ulong data);
  25 static void flash_get_offsets(ulong base, flash_info_t *info);
  26
  27 unsigned long flash_init(void)
  28 {
  29         int i;
  30         unsigned long size_b0, base_b0;
  31         unsigned long size_b1;
  32
  33         /* Init: no FLASHes known */
  34         for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i)
  35                 flash_info[i].flash_id = FLASH_UNKNOWN;
  36
  37         /* Get Size of Boot and Main Flashes */
  38         size_b0 = flash_get_size((vu_long *) FLASH_BASE0_PRELIM,
  39                                &flash_info[0]);
  40         if (flash_info[0].flash_id == FLASH_UNKNOWN) {
  41                 printf("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
  42                         size_b0, size_b0 << 20);
  43                 return 0;
  44         }
  45         size_b1 =
  46                 flash_get_size((vu_long *) FLASH_BASE1_PRELIM,
  47                                &flash_info[1]);
  48         if (flash_info[1].flash_id == FLASH_UNKNOWN) {
  49                 printf("## Unknown FLASH on Bank 1 - Size = 0x%08lx = %ld MB\n",
  50                         size_b1, size_b1 << 20);
  51                 return 0;
  52         }
  53
  54         /* Calculate base addresses */
  55         base_b0 = -size_b0;
  56
  57         /* Setup offsets for Boot Flash */
  58         flash_get_offsets(base_b0, &flash_info[0]);
  59
  60         /* Protect board level data */
  61         (void) flash_protect(FLAG_PROTECT_SET,
  62                              base_b0,
  63                              flash_info[0].start[1] - 1, &flash_info[0]);
  64
  65         /* Monitor protection ON by default */
  66         (void) flash_protect(FLAG_PROTECT_SET,
  67                              base_b0 + size_b0 - monitor_flash_len,
  68                              base_b0 + size_b0 - 1, &flash_info[0]);
  69
  70         /* Protect the FPGA image */
  71         (void) flash_protect(FLAG_PROTECT_SET,
  72                              FLASH_BASE1_PRELIM,
  73                              FLASH_BASE1_PRELIM + CONFIG_SYS_FPGA_IMAGE_LEN -
  74                              1, &flash_info[1]);
  75
  76         /* Protect the default boot image */
  77         (void) flash_protect(FLAG_PROTECT_SET,
  78                              FLASH_BASE1_PRELIM + CONFIG_SYS_FPGA_IMAGE_LEN,
  79                              FLASH_BASE1_PRELIM + CONFIG_SYS_FPGA_IMAGE_LEN +
  80                              0x600000 - 1, &flash_info[1]);
  81
  82         /* Setup offsets for Main Flash */
  83         flash_get_offsets(FLASH_BASE1_PRELIM, &flash_info[1]);
  84
  85         return size_b0 + size_b1;
  86 }
  87
  88 static void flash_get_offsets(ulong base, flash_info_t *info)
  89 {
  90         int i;
  91
  92         /* set up sector start address table - FOR BOOT ROM ONLY!!! */
  93         if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) {
  94                 for (i = 0; i < info->sector_count; i++)
  95                         info->start[i] = base + (i * 0x00010000);
  96         }
  97 }                               /* end flash_get_offsets() */
  98
  99 void flash_print_info(flash_info_t *info)
 100 {
 101         int i;
 102         int k;
 103         int size;
 104         int erased;
 105         volatile unsigned long *flash;
 106
 107         if (info->flash_id == FLASH_UNKNOWN) {
 108                 printf("missing or unknown FLASH type\n");
 109                 return;
 110         }
 111
 112         switch (info->flash_id & FLASH_VENDMASK) {
 113         case FLASH_MAN_AMD:
 114                 printf("1 x AMD ");
 115                 break;
 116         case FLASH_MAN_STM:
 117                 printf("1 x STM ");
 118                 break;
 119         case FLASH_MAN_INTEL:
 120                 printf("2 x Intel ");
 121                 break;
 122         default:
 123                 printf("Unknown Vendor ");
 124         }
 125
 126         switch (info->flash_id & FLASH_TYPEMASK) {
 127         case FLASH_AM040:
 128                 if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_AMD)
 129                         printf("AM29LV040 (4096 Kbit, uniform sector size)\n");
 130                 else if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_STM)
 131                         printf("M29W040B (4096 Kbit, uniform block size)\n");
 132                 else
 133                         printf("UNKNOWN 29x040x (4096 Kbit, uniform sector size)\n");
 134                 break;
 135         case FLASH_28F320J3A:
 136                 printf("28F320J3A (32 Mbit = 128K x 32)\n");
 137                 break;
 138         case FLASH_28F640J3A:
 139                 printf("28F640J3A (64 Mbit = 128K x 64)\n");
 140                 break;
 141         case FLASH_28F128J3A:
 142                 printf("28F128J3A (128 Mbit = 128K x 128)\n");
 143                 break;
 144         default:
 145                 printf("Unknown Chip Type\n");
 146         }
 147
 148         if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_STM) {
 149                 printf("  Size: %ld KB in %d Blocks\n",
 150                        info->size >> 10, info->sector_count);
 151         } else {
 152                 printf("  Size: %ld KB in %d Sectors\n",
 153                        info->size >> 10, info->sector_count);
 154         }
 155
 156         printf("  Sector Start Addresses:");
 157         for (i = 0; i < info->sector_count; ++i) {
 158                 /*
 159                  * Check if whole sector is erased
 160                  */
 161                 if (i != (info->sector_count - 1))
 162                         size = info->start[i + 1] - info->start[i];
 163                 else
 164                         size = info->start[0] + info->size - info->start[i];
 165                 erased = 1;
 166                 flash = (volatile unsigned long *) info->start[i];
 167                 size = size >> 2;       /* divide by 4 for longword access */
 168                 for (k = 0; k < size; k++) {
 169                         if (*flash++ != 0xffffffff) {
 170                                 erased = 0;
 171                                 break;
 172                         }
 173                 }
 174
 175                 if ((i % 5) == 0)
 176                         printf("\n   ");
 177                 printf(" %08lX%s%s",
 178                        info->start[i],
 179                        erased ? " E" : "  ",
 180                        info->protect[i] ? "RO " : "   ");
 181         }
 182         printf("\n");
 183 }                               /* end flash_print_info() */
 184
 185 /*
 186  * The following code cannot be run from FLASH!
 187  */
 188 static ulong flash_get_size(vu_long *addr, flash_info_t *info)
 189 {
 190         short i;
 191         ulong base = (ulong) addr;
 192
 193         /* Setup default type */
 194         info->flash_id = FLASH_UNKNOWN;
 195         info->sector_count = 0;
 196         info->size = 0;
 197
 198         /* Test for Boot Flash */
 199         if (base == FLASH_BASE0_PRELIM) {
 200                 unsigned char value;
 201                 volatile unsigned char *addr2 = (unsigned char *) addr;
 202
 203                 /* Write auto select command: read Manufacturer ID */
 204                 *(addr2 + 0x555) = 0xaa;
 205                 *(addr2 + 0x2aa) = 0x55;
 206                 *(addr2 + 0x555) = 0x90;
 207
 208                 /* Manufacture ID */
 209                 value = *addr2;
 210                 switch (value) {
 211                 case (unsigned char) AMD_MANUFACT:
 212                         info->flash_id = FLASH_MAN_AMD;
 213                         break;
 214                 case (unsigned char) STM_MANUFACT:
 215                         info->flash_id = FLASH_MAN_STM;
 216                         break;
 217                 default:
 218                         *addr2 = 0xf0;  /* no or unknown flash  */
 219                         return 0;
 220                 }
 221
 222                 /* Device ID */
 223                 value = *(addr2 + 1);
 224                 switch (value) {
 225                 case (unsigned char) AMD_ID_LV040B:
 226                 case (unsigned char) STM_ID_29W040B:
 227                         info->flash_id += FLASH_AM040;
 228                         info->sector_count = 8;
 229                         info->size = 0x00080000;
 230                         break;  /* => 512Kb */
 231                 default:
 232                         *addr2 = 0xf0;  /* => no or unknown flash */
 233                         return 0;
 234                 }
 235         } else {                /* MAIN Flash */
 236                 unsigned long value;
 237                 volatile unsigned long *addr2 = (unsigned long *) addr;
 238
 239                 /* Write auto select command: read Manufacturer ID */
 240                 *addr2 = 0x90909090;
 241
 242                 /* Manufacture ID */
 243                 value = *addr2;
 244                 switch (value) {
 245                 case (unsigned long) INTEL_MANUFACT:
 246                         info->flash_id = FLASH_MAN_INTEL;
 247                         break;
 248                 default:
 249                         *addr2 = 0xff;  /* no or unknown flash  */
 250                         return 0;
 251                 }
 252
 253                 /* Device ID - This shit is interleaved... */
 254                 value = *(addr2 + 1);
 255                 switch (value) {
 256                 case (unsigned long) INTEL_ID_28F320J3A:
 257                         info->flash_id += FLASH_28F320J3A;
 258                         info->sector_count = 32;
 259                         info->size = 0x00400000 * 2;
 260                         break;  /* => 2 X 4 MB */
 261                 case (unsigned long) INTEL_ID_28F640J3A:
 262                         info->flash_id += FLASH_28F640J3A;
 263                         info->sector_count = 64;
 264                         info->size = 0x00800000 * 2;
 265                         break;  /* => 2 X 8 MB */
 266                 case (unsigned long) INTEL_ID_28F128J3A:
 267                         info->flash_id += FLASH_28F128J3A;
 268                         info->sector_count = 128;
 269                         info->size = 0x01000000 * 2;
 270                         break;  /* => 2 X 16 MB */
 271                 default:
 272                         *addr2 = 0xff;  /* => no or unknown flash */
 273                 }
 274         }
 275
 276         /* Make sure we don't exceed CONFIG_SYS_MAX_FLASH_SECT */
 277         if (info->sector_count > CONFIG_SYS_MAX_FLASH_SECT) {
 278                 printf("** ERROR: sector count %d > max (%d) **\n",
 279                        info->sector_count, CONFIG_SYS_MAX_FLASH_SECT);
 280                 info->sector_count = CONFIG_SYS_MAX_FLASH_SECT;
 281         }
 282
 283         /* set up sector start address table */
 284         switch (info->flash_id & FLASH_TYPEMASK) {
 285         case FLASH_AM040:
 286                 for (i = 0; i < info->sector_count; i++)
 287                         info->start[i] = base + (i * 0x00010000);
 288                 break;
 289         case FLASH_28F320J3A:
 290         case FLASH_28F640J3A:
 291         case FLASH_28F128J3A:
 292                 for (i = 0; i < info->sector_count; i++)
 293                         info->start[i] = base +
 294                                         (i * 0x00020000 * 2);   /* 2 Banks */
 295                 break;
 296         }
 297
 298         /* Test for Boot Flash */
 299         if (base == FLASH_BASE0_PRELIM) {
 300                 volatile unsigned char *addr2;
 301
 302                 /* check for protected sectors */
 303                 for (i = 0; i < info->sector_count; i++) {
 304                         /*
 305                          * read sector protection at sector address,
 306                          * (AX .. A0) = 0x02
 307                          * D0 = 1 if protected
 308                          */
 309                         addr2 = (volatile unsigned char *) (info->start[i]);
 310                         info->protect[i] = *(addr2 + 2) & 1;
 311                 }
 312
 313                 /* Restore read mode */
 314                 *(unsigned char *) base = 0xF0; /* Reset NORMAL Flash */
 315         } else {                /* Main Flash */
 316                 volatile unsigned long *addr2;
 317
 318                 /* check for protected sectors */
 319                 for (i = 0; i < info->sector_count; i++) {
 320                         /*
 321                          * read sector protection at sector address,
 322                          * (AX .. A0) = 0x02
 323                          * D0 = 1 if protected
 324                          */
 325                         addr2 = (volatile unsigned long *) (info->start[i]);
 326                         info->protect[i] = *(addr2 + 2) & 0x1;
 327                 }
 328
 329                 /* Restore read mode */
 330                 *(unsigned long *) base = 0xFFFFFFFF;   /* Reset  Flash */
 331         }
 332
 333         return info->size;
 334 }                               /* end flash_get_size() */
 335
 336 static int wait_for_DQ7(ulong addr, uchar cmp_val, ulong tout)
 337 {
 338         int i;
 339
 340         volatile uchar *vaddr = (uchar *) addr;
 341
 342         /* Loop X times */
 343         for (i = 1; i <= (100 * tout); i++) {   /* Wait up to tout ms */
 344                 udelay(10);
 345                 /* Pause 10 us */
 346
 347                 /* Check for completion */
 348                 if ((vaddr[0] & 0x80) == (cmp_val & 0x80))
 349                         return 0;
 350
 351                 /* KEEP THE LUSER HAPPY - Print a dot every 1.1 seconds */
 352                 if (!(i % 110000))
 353                         putc('.');
 354
 355                 /* Kick the dog if needed */
 356                 WATCHDOG_RESET();
 357         }
 358
 359         return 1;
 360 }                               /* wait_for_DQ7() */
 361
 362 static int flash_erase8(flash_info_t *info, int s_first, int s_last)
 363 {
 364         int tcode, rcode = 0;
 365         volatile uchar *addr = (uchar *) (info->start[0]);
 366         volatile uchar *sector_addr;
 367         int flag, prot, sect;
 368
 369         /* Validate arguments */
 370         if ((s_first < 0) || (s_first > s_last)) {
 371                 if (info->flash_id == FLASH_UNKNOWN)
 372                         printf("- missing\n");
 373                 else
 374                         printf("- no sectors to erase\n");
 375                 return 1;
 376         }
 377
 378         /* Check for KNOWN flash type */
 379         if (info->flash_id == FLASH_UNKNOWN) {
 380                 printf("Can't erase unknown flash type - aborted\n");
 381                 return 1;
 382         }
 383
 384         /* Check for protected sectors */
 385         prot = 0;
 386         for (sect = s_first; sect <= s_last; ++sect) {
 387                 if (info->protect[sect])
 388                         prot++;
 389         }
 390         if (prot) {
 391                 printf("- Warning: %d protected sectors will not be erased!\n",
 392                         prot);
 393         } else {
 394                 printf("\n");
 395         }
 396
 397         /* Start erase on unprotected sectors */
 398         for (sect = s_first; sect <= s_last; sect++) {
 399                 if (info->protect[sect] == 0) { /* not protected */
 400                         sector_addr = (uchar *) (info->start[sect]);
 401
 402                         if ((info->flash_id & FLASH_VENDMASK) ==
 403                             FLASH_MAN_STM)
 404                                 printf("Erasing block %p\n", sector_addr);
 405                         else
 406                                 printf("Erasing sector %p\n", sector_addr);
 407
 408                         /* Disable interrupts which might cause timeout */
 409                         flag = disable_interrupts();
 410
 411                         *(addr + 0x555) = (uchar) 0xAA;
 412                         *(addr + 0x2aa) = (uchar) 0x55;
 413                         *(addr + 0x555) = (uchar) 0x80;
 414                         *(addr + 0x555) = (uchar) 0xAA;
 415                         *(addr + 0x2aa) = (uchar) 0x55;
 416                         *sector_addr = (uchar) 0x30;    /* sector erase */
 417
 418                         /*
 419                          * Wait for each sector to complete, it's more
 420                          * reliable.  According to AMD Spec, you must
 421                          * issue all erase commands within a specified
 422                          * timeout.  This has been seen to fail, especially
 423                          * if printf()s are included (for debug)!!
 424                          * Takes up to 6 seconds.
 425                          */
 426                         tcode = wait_for_DQ7((ulong) sector_addr, 0x80, 6000);
 427
 428                         /* re-enable interrupts if necessary */
 429                         if (flag)
 430                                 enable_interrupts();
 431
 432                         /* Make sure we didn't timeout */
 433                         if (tcode) {
 434                                 printf("Timeout\n");
 435                                 rcode = 1;
 436                         }
 437                 }
 438         }
 439
 440         /* wait at least 80us - let's wait 1 ms */
 441         udelay(1000);
 442
 443         /* reset to read mode */
 444         addr = (uchar *) info->start[0];
 445         *addr = (uchar) 0xF0;   /* reset bank */
 446
 447         printf(" done\n");
 448         return rcode;
 449 }                               /* end flash_erase8() */
 450
 451 static int flash_erase32(flash_info_t *info, int s_first, int s_last)
 452 {
 453         int flag, sect;
 454         ulong start, now, last;
 455         int prot = 0;
 456
 457         /* Validate arguments */
 458         if ((s_first < 0) || (s_first > s_last)) {
 459                 if (info->flash_id == FLASH_UNKNOWN)
 460                         printf("- missing\n");
 461                 else
 462                         printf("- no sectors to erase\n");
 463                 return 1;
 464         }
 465
 466         /* Check for KNOWN flash type */
 467         if ((info->flash_id & FLASH_VENDMASK) != FLASH_MAN_INTEL) {
 468                 printf("Can erase only Intel flash types - aborted\n");
 469                 return 1;
 470         }
 471
 472         /* Check for protected sectors */
 473         for (sect = s_first; sect <= s_last; ++sect) {
 474                 if (info->protect[sect])
 475                         prot++;
 476         }
 477         if (prot) {
 478                 printf("- Warning: %d protected sectors will not be erased!\n",
 479                         prot);
 480         } else {
 481                 printf("\n");
 482         }
 483
 484         start = get_timer(0);
 485         last = start;
 486         /* Start erase on unprotected sectors */
 487         for (sect = s_first; sect <= s_last; sect++) {
 488                 WATCHDOG_RESET();
 489                 if (info->protect[sect] == 0) { /* not protected */
 490                         vu_long *addr = (vu_long *) (info->start[sect]);
 491                         unsigned long status;
 492
 493                         /* Disable interrupts which might cause a timeout */
 494                         flag = disable_interrupts();
 495
 496                         *addr = 0x00500050;     /* clear status register */
 497                         *addr = 0x00200020;     /* erase setup */
 498                         *addr = 0x00D000D0;     /* erase confirm */
 499
 500                         /* re-enable interrupts if necessary */
 501                         if (flag)
 502                                 enable_interrupts();
 503
 504                         /* Wait at least 80us - let's wait 1 ms */
 505                         udelay(1000);
 506
 507                         while (((status = *addr) & 0x00800080) != 0x00800080) {
 508                                 now = get_timer(start);
 509                                 if (now > CONFIG_SYS_FLASH_ERASE_TOUT) {
 510                                         printf("Timeout\n");
 511                                         /* suspend erase      */
 512                                         *addr = 0x00B000B0;
 513                                         /* reset to read mode */
 514                                         *addr = 0x00FF00FF;
 515                                         return 1;
 516                                 }
 517
 518                                 /*
 519                                  * show that we're waiting
 520                                  * every second (?)
 521                                  */
 522                                 if ((now - last) > 990) {
 523                                         putc('.');
 524                                         last = now;
 525                                 }
 526                         }
 527                         *addr = 0x00FF00FF;     /* reset to read mode */
 528                 }
 529         }
 530         printf(" done\n");
 531         return 0;
 532 }
 533
 534 int flash_erase(flash_info_t *info, int s_first, int s_last)
 535 {
 536         if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040)
 537                 return flash_erase8(info, s_first, s_last);
 538         else
 539                 return flash_erase32(info, s_first, s_last);
 540 }
 541
 542 /*
 543  * Copy memory to flash, returns:
 544  * 0 - OK
 545  * 1 - write timeout
 546  * 2 - Flash not erased
 547  */
 548 static int write_buff8(flash_info_t *info, uchar *src, ulong addr,
 549                        ulong cnt)
 550 {
 551         ulong cp, wp, data;
 552         ulong start;
 553         int i, l, rc;
 554
 555         start = get_timer(0);
 556
 557         wp = (addr & ~3);       /* get lower word
 558                                    aligned address */
 559
 560         /*
 561          * handle unaligned start bytes
 562          */
 563         l = addr - wp;
 564         if (l != 0) {
 565                 data = 0;
 566                 for (i = 0, cp = wp; i < l; ++i, ++cp)
 567                         data = (data << 8) | (*(uchar *) cp);
 568
 569                 for (; i < 4 && cnt > 0; ++i) {
 570                         data = (data << 8) | *src++;
 571                         --cnt;
 572                         ++cp;
 573                 }
 574
 575                 for (; cnt == 0 && i < 4; ++i, ++cp)
 576                         data = (data << 8) | (*(uchar *) cp);
 577
 578                 rc = write_word8(info, wp, data);
 579                 if (rc != 0)
 580                         return rc;
 581
 582                 wp += 4;
 583         }
 584
 585         /*
 586          * handle word aligned part
 587          */
 588         while (cnt >= 4) {
 589                 data = 0;
 590                 for (i = 0; i < 4; ++i)
 591                         data = (data << 8) | *src++;
 592
 593                 rc = write_word8(info, wp, data);
 594                 if (rc != 0)
 595                         return rc;
 596
 597                 wp += 4;
 598                 cnt -= 4;
 599                 if (get_timer(start) > 1000) {  /* every second */
 600                         WATCHDOG_RESET();
 601                         putc('.');
 602                         start = get_timer(0);
 603                 }
 604         }
 605
 606         if (cnt == 0)
 607                 return 0;
 608
 609         /*
 610          * handle unaligned tail bytes
 611          */
 612         data = 0;
 613         for (i = 0, cp = wp; i < 4 && cnt > 0; ++i, ++cp) {
 614                 data = (data << 8) | *src++;
 615                 --cnt;
 616         }
 617
 618         for (; i < 4; ++i, ++cp)
 619                 data = (data << 8) | (*(uchar *) cp);
 620
 621         return write_word8(info, wp, data);
 622 }
 623
 624 #define FLASH_WIDTH     4       /* flash bus width in bytes */
 625 static int write_buff32(flash_info_t *info, uchar *src, ulong addr,
 626                         ulong cnt)
 627 {
 628         ulong cp, wp, data;
 629         int i, l, rc;
 630         ulong start;
 631
 632         start = get_timer(0);
 633
 634         if (info->flash_id == FLASH_UNKNOWN)
 635                 return 4;
 636
 637         /* get lower FLASH_WIDTH aligned address */
 638         wp = (addr & ~(FLASH_WIDTH - 1));
 639
 640         /*
 641          * handle unaligned start bytes
 642          */
 643         if ((l = addr - wp) != 0) {
 644                 data = 0;
 645                 for (i = 0, cp = wp; i < l; ++i, ++cp)
 646                         data = (data << 8) | (*(uchar *) cp);
 647
 648                 for (; i < FLASH_WIDTH && cnt > 0; ++i) {
 649                         data = (data << 8) | *src++;
 650                         --cnt;
 651                         ++cp;
 652                 }
 653
 654                 for (; cnt == 0 && i < FLASH_WIDTH; ++i, ++cp)
 655                         data = (data << 8) | (*(uchar *) cp);
 656
 657                 rc = write_word32(info, wp, data);
 658                 if (rc != 0)
 659                         return rc;
 660
 661                 wp += FLASH_WIDTH;
 662         }
 663
 664         /*
 665          * handle FLASH_WIDTH aligned part
 666          */
 667         while (cnt >= FLASH_WIDTH) {
 668                 data = 0;
 669                 for (i = 0; i < FLASH_WIDTH; ++i)
 670                         data = (data << 8) | *src++;
 671
 672                 rc = write_word32(info, wp, data);
 673                 if (rc != 0)
 674                         return rc;
 675
 676                 wp += FLASH_WIDTH;
 677                 cnt -= FLASH_WIDTH;
 678                 if (get_timer(start) > 990) {   /* every second */
 679                         putc('.');
 680                         start = get_timer(0);
 681                 }
 682         }
 683
 684         if (cnt == 0)
 685                 return 0;
 686
 687         /*
 688          * handle unaligned tail bytes
 689          */
 690         data = 0;
 691         for (i = 0, cp = wp; i < FLASH_WIDTH && cnt > 0; ++i, ++cp) {
 692                 data = (data << 8) | *src++;
 693                 --cnt;
 694         }
 695
 696         for (; i < FLASH_WIDTH; ++i, ++cp)
 697                 data = (data << 8) | (*(uchar *) cp);
 698
 699         return write_word32(info, wp, data);
 700 }
 701
 702 int write_buff(flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 703 {
 704         int retval;
 705
 706         if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040)
 707                 retval = write_buff8(info, src, addr, cnt);
 708         else
 709                 retval = write_buff32(info, src, addr, cnt);
 710
 711         return retval;
 712 }
 713
 714 /*
 715  * Write a word to Flash, returns:
 716  * 0 - OK
 717  * 1 - write timeout
 718  * 2 - Flash not erased
 719  */
 720
 721 static int write_word8(flash_info_t *info, ulong dest, ulong data)
 722 {
 723         volatile uchar *addr2 = (uchar *) (info->start[0]);
 724         volatile uchar *dest2 = (uchar *) dest;
 725         volatile uchar *data2 = (uchar *) &data;
 726         int flag;
 727         int i, tcode, rcode = 0;
 728
 729         /* Check if Flash is (sufficently) erased */
 730         if ((*((volatile uchar *)dest) & (uchar)data) != (uchar)data)
 731                 return 2;
 732
 733         for (i = 0; i < (4 / sizeof(uchar)); i++) {
 734                 /* Disable interrupts which might cause a timeout here */
 735                 flag = disable_interrupts();
 736
 737                 *(addr2 + 0x555) = (uchar) 0xAA;
 738                 *(addr2 + 0x2aa) = (uchar) 0x55;
 739                 *(addr2 + 0x555) = (uchar) 0xA0;
 740
 741                 dest2[i] = data2[i];
 742
 743                 /* Wait for write to complete, up to 1ms */
 744                 tcode = wait_for_DQ7((ulong) &dest2[i], data2[i], 1);
 745
 746                 /* re-enable interrupts if necessary */
 747                 if (flag)
 748                         enable_interrupts();
 749
 750                 /* Make sure we didn't timeout */
 751                 if (tcode)
 752                         rcode = 1;
 753         }
 754
 755         return rcode;
 756 }
 757
 758 static int write_word32(flash_info_t *info, ulong dest, ulong data)
 759 {
 760         vu_long *addr = (vu_long *) dest;
 761         ulong status;
 762         ulong start;
 763         int flag;
 764
 765         /* Check if Flash is (sufficiently) erased */
 766         if ((*addr & data) != data)
 767                 return 2;
 768
 769         /* Disable interrupts which might cause a timeout here */
 770         flag = disable_interrupts();
 771
 772         *addr = 0x00400040;     /* write setup */
 773         *addr = data;
 774
 775         /* re-enable interrupts if necessary */
 776         if (flag)
 777                 enable_interrupts();
 778
 779         start = get_timer(0);
 780
 781         while (((status = *addr) & 0x00800080) != 0x00800080) {
 782                 WATCHDOG_RESET();
 783                 if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
 784                         *addr = 0x00FF00FF;     /* restore read mode */
 785                         return 1;
 786                 }
 787         }
 788
 789         *addr = 0x00FF00FF;     /* restore read mode */
 790
 791         return 0;
 792 }
 793
 794 static int _flash_protect(flash_info_t *info, long sector)
 795 {
 796         int i;
 797         int flag;
 798         ulong status;
 799         int rcode = 0;
 800         volatile long *addr = (long *)sector;
 801
 802         switch (info->flash_id & FLASH_TYPEMASK) {
 803         case FLASH_28F320J3A:
 804         case FLASH_28F640J3A:
 805         case FLASH_28F128J3A:
 806                 /* Disable interrupts which might cause Flash to timeout */
 807                 flag = disable_interrupts();
 808
 809                 /* Issue command */
 810                 *addr = 0x00500050L;    /* Clear the status register */
 811                 *addr = 0x00600060L;    /* Set lock bit setup */
 812                 *addr = 0x00010001L;    /* Set lock bit confirm */
 813
 814                 /* Wait for command completion */
 815                 for (i = 0; i < 10; i++) {      /* 75us timeout, wait 100us */
 816                         udelay(10);
 817                         if ((*addr & 0x00800080L) == 0x00800080L)
 818                                 break;
 819                 }
 820
 821                 /* Not successful? */
 822                 status = *addr;
 823                 if (status != 0x00800080L) {
 824                         printf("Protect %x sector failed: %x\n",
 825                                (uint) sector, (uint) status);
 826                         rcode = 1;
 827                 }
 828
 829                 /* Restore read mode */
 830                 *addr = 0x00ff00ffL;
 831
 832                 /* re-enable interrupts if necessary */
 833                 if (flag)
 834                         enable_interrupts();
 835
 836                 break;
 837         case FLASH_AM040:       /* No soft sector protection */
 838                 break;
 839         }
 840
 841         /* Turn protection on for this sector */
 842         for (i = 0; i < info->sector_count; i++) {
 843                 if (info->start[i] == sector) {
 844                         info->protect[i] = 1;
 845                         break;
 846                 }
 847         }
 848
 849         return rcode;
 850 }
 851
 852 static int _flash_unprotect(flash_info_t *info, long sector)
 853 {
 854         int i;
 855         int flag;
 856         ulong status;
 857         int rcode = 0;
 858         volatile long *addr = (long *) sector;
 859
 860         switch (info->flash_id & FLASH_TYPEMASK) {
 861         case FLASH_28F320J3A:
 862         case FLASH_28F640J3A:
 863         case FLASH_28F128J3A:
 864                 /* Disable interrupts which might cause Flash to timeout */
 865                 flag = disable_interrupts();
 866
 867                 *addr = 0x00500050L;    /* Clear the status register */
 868                 *addr = 0x00600060L;    /* Clear lock bit setup */
 869                 *addr = 0x00D000D0L;    /* Clear lock bit confirm */
 870
 871                 /* Wait for command completion */
 872                 for (i = 0; i < 80; i++) {      /* 700ms timeout, wait 800 */
 873                         udelay(10000);  /* Delay 10ms */
 874                         if ((*addr & 0x00800080L) == 0x00800080L)
 875                                 break;
 876                 }
 877
 878                 /* Not successful? */
 879                 status = *addr;
 880                 if (status != 0x00800080L) {
 881                         printf("Un-protect %x sector failed: %x\n",
 882                                (uint) sector, (uint) status);
 883                         *addr = 0x00ff00ffL;
 884                         rcode = 1;
 885                 }
 886
 887                 /* restore read mode */
 888                 *addr = 0x00ff00ffL;
 889
 890                 /* re-enable interrupts if necessary */
 891                 if (flag)
 892                         enable_interrupts();
 893
 894                 break;
 895         case FLASH_AM040:       /* No soft sector protection */
 896                 break;
 897         }
 898
 899         /*
 900          * Fix Intel's little red wagon.  Reprotect
 901          * sectors that were protected before we undid
 902          * protection on a specific sector.
 903          */
 904         for (i = 0; i < info->sector_count; i++) {
 905                 if (info->start[i] != sector) {
 906                         if (info->protect[i]) {
 907                                 if (_flash_protect(info, info->start[i]))
 908                                         rcode = 1;
 909                         }
 910                 } else          /* Turn protection off for this sector */
 911                         info->protect[i] = 0;
 912         }
 913
 914         return rcode;
 915 }
 916
 917 int flash_real_protect(flash_info_t *info, long sector, int prot)
 918 {
 919         int rcode;
 920
 921         if (prot)
 922                 rcode = _flash_protect(info, info->start[sector]);
 923         else
 924                 rcode = _flash_unprotect(info, info->start[sector]);
 925
 926         return rcode;
 927 }