board/dave/common/flash.c

   1 /*
   2  * (C) Copyright 2001
   3  * Stefan Roese, esd gmbh germany, stefan.roese@esd-electronics.com
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>
   9 #include <asm/processor.h>
  10
  11 flash_info_t    flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
  12
  13 /*-----------------------------------------------------------------------
  14  * Functions
  15  */
  16 static int write_word (flash_info_t *info, ulong dest, ulong data);
  17
  18 /*-----------------------------------------------------------------------
  19  */
  20 static void flash_get_offsets (ulong base, flash_info_t *info)
  21 {
  22         int i;
  23         short n;
  24
  25         /* set up sector start address table */
  26         if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||
  27             ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM640U)) {
  28             for (i = 0; i < info->sector_count; i++)
  29                 info->start[i] = base + (i * 0x00010000);
  30         } else if (((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL322B) ||
  31                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL323B) ||
  32                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320B) ||
  33                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL324B)) {
  34                 /* set sector offsets for bottom boot block type        */
  35                 for (i=0; i<8; ++i) {           /*  8 x 8k boot sectors */
  36                         info->start[i] = base;
  37                         base += 8 << 10;
  38                 }
  39                 while (i < info->sector_count) {        /* 64k regular sectors  */
  40                         info->start[i] = base;
  41                         base += 64 << 10;
  42                         ++i;
  43                 }
  44         } else if (((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL322T) ||
  45                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL323T) ||
  46                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320T) ||
  47                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL324T)) {
  48                 /* set sector offsets for top boot block type           */
  49                 base += info->size;
  50                 i = info->sector_count;
  51                 for (n=0; n<8; ++n) {           /*  8 x 8k boot sectors */
  52                         base -= 8 << 10;
  53                         --i;
  54                         info->start[i] = base;
  55                 }
  56                 while (i > 0) {                 /* 64k regular sectors  */
  57                         base -= 64 << 10;
  58                         --i;
  59                         info->start[i] = base;
  60                 }
  61         } else {
  62             if (info->flash_id & FLASH_BTYPE) {
  63                 /* set sector offsets for bottom boot block type        */
  64                 info->start[0] = base + 0x00000000;
  65                 info->start[1] = base + 0x00004000;
  66                 info->start[2] = base + 0x00006000;
  67                 info->start[3] = base + 0x00008000;
  68                 for (i = 4; i < info->sector_count; i++) {
  69                         info->start[i] = base + (i * 0x00010000) - 0x00030000;
  70                 }
  71             } else {
  72                 /* set sector offsets for top boot block type           */
  73                 i = info->sector_count - 1;
  74                 info->start[i--] = base + info->size - 0x00004000;
  75                 info->start[i--] = base + info->size - 0x00006000;
  76                 info->start[i--] = base + info->size - 0x00008000;
  77                 for (; i >= 0; i--) {
  78                         info->start[i] = base + i * 0x00010000;
  79                 }
  80             }
  81         }
  82 }
  83
  84 /*-----------------------------------------------------------------------
  85  */
  86 void flash_print_info  (flash_info_t *info)
  87 {
  88         int i;
  89         int k;
  90         int size;
  91         int erased;
  92         volatile unsigned long *flash;
  93
  94         if (info->flash_id == FLASH_UNKNOWN) {
  95                 printf ("missing or unknown FLASH type\n");
  96                 return;
  97         }
  98
  99         switch (info->flash_id & FLASH_VENDMASK) {
 100         case FLASH_MAN_AMD:     printf ("AMD ");                break;
 101         case FLASH_MAN_FUJ:     printf ("FUJITSU ");            break;
 102         case FLASH_MAN_SST:     printf ("SST ");                break;
 103         case FLASH_MAN_STM:     printf ("ST  ");                break;
 104         default:                printf ("Unknown Vendor ");     break;
 105         }
 106
 107         switch (info->flash_id & FLASH_TYPEMASK) {
 108         case FLASH_AM400B:      printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
 109                                 break;
 110         case FLASH_AM400T:      printf ("AM29LV400T (4 Mbit, top boot sector)\n");
 111                                 break;
 112         case FLASH_AM800B:      printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
 113                                 break;
 114         case FLASH_AM800T:      printf ("AM29LV800T (8 Mbit, top boot sector)\n");
 115                                 break;
 116         case FLASH_AM160B:      printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
 117                                 break;
 118         case FLASH_AM160T:      printf ("AM29LV160T (16 Mbit, top boot sector)\n");
 119                                 break;
 120         case FLASH_AM320T:      printf ("AM29LV320T (32 M, top sector)\n");
 121                                 break;
 122         case FLASH_AM320B:      printf ("AM29LV320B (32 M, bottom sector)\n");
 123                                 break;
 124         case FLASH_AMDL322T:    printf ("AM29DL322T (32 M, top sector)\n");
 125                                 break;
 126         case FLASH_AMDL322B:    printf ("AM29DL322B (32 M, bottom sector)\n");
 127                                 break;
 128         case FLASH_AMDL323T:    printf ("AM29DL323T (32 M, top sector)\n");
 129                                 break;
 130         case FLASH_AMDL323B:    printf ("AM29DL323B (32 M, bottom sector)\n");
 131                                 break;
 132         case FLASH_AM640U:      printf ("AM29LV640D (64 M, uniform sector)\n");
 133                                 break;
 134         case FLASH_SST800A:     printf ("SST39LF/VF800 (8 Mbit, uniform sector size)\n");
 135                                 break;
 136         case FLASH_SST160A:     printf ("SST39LF/VF160 (16 Mbit, uniform sector size)\n");
 137                                 break;
 138         case FLASH_STMW320DT:   printf ("M29W320DT (32 M, top sector)\n");
 139                                 break;
 140         default:                printf ("Unknown Chip Type\n");
 141                                 break;
 142         }
 143
 144         printf ("  Size: %ld MB in %d Sectors\n",
 145                 info->size >> 20, info->sector_count);
 146
 147         printf ("  Sector Start Addresses:");
 148         for (i=0; i<info->sector_count; ++i) {
 149 #ifdef CONFIG_SYS_FLASH_EMPTY_INFO
 150                 /*
 151                  * Check if whole sector is erased
 152                  */
 153                 if (i != (info->sector_count-1))
 154                   size = info->start[i+1] - info->start[i];
 155                 else
 156                   size = info->start[0] + info->size - info->start[i];
 157                 erased = 1;
 158                 flash = (volatile unsigned long *)info->start[i];
 159                 size = size >> 2;        /* divide by 4 for longword access */
 160                 for (k=0; k<size; k++)
 161                   {
 162                     if (*flash++ != 0xffffffff)
 163                       {
 164                         erased = 0;
 165                         break;
 166                       }
 167                   }
 168
 169                 if ((i % 5) == 0)
 170                         printf ("\n   ");
 171                 /* print empty and read-only info */
 172                 printf (" %08lX%s%s",
 173                         info->start[i],
 174                         erased ? " E" : "  ",
 175                         info->protect[i] ? "RO " : "   ");
 176 #else
 177                 if ((i % 5) == 0)
 178                         printf ("\n   ");
 179                 printf (" %08lX%s",
 180                         info->start[i],
 181                         info->protect[i] ? " (RO)" : "     ");
 182 #endif
 183
 184         }
 185         printf ("\n");
 186         return;
 187 }
 188
 189 /*-----------------------------------------------------------------------
 190  */
 191
 192
 193 /*-----------------------------------------------------------------------
 194  */
 195
 196 /*
 197  * The following code cannot be run from FLASH!
 198  */
 199 static ulong flash_get_size (vu_long *addr, flash_info_t *info)
 200 {
 201         short i;
 202         short n;
 203         CONFIG_SYS_FLASH_WORD_SIZE value;
 204         ulong base = (ulong)addr;
 205         volatile CONFIG_SYS_FLASH_WORD_SIZE *addr2 = (CONFIG_SYS_FLASH_WORD_SIZE *)addr;
 206
 207         debug("[%s, %d] Entering ...\n", __FUNCTION__, __LINE__);
 208
 209         /* Write auto select command: read Manufacturer ID */
 210         addr2[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00AA00AA;
 211         addr2[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00550055;
 212         addr2[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00900090;
 213
 214         value = addr2[CONFIG_SYS_FLASH_READ0];
 215
 216         switch (value) {
 217         case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_MANUFACT:
 218                 info->flash_id = FLASH_MAN_AMD;
 219                 break;
 220         case (CONFIG_SYS_FLASH_WORD_SIZE)FUJ_MANUFACT:
 221                 info->flash_id = FLASH_MAN_FUJ;
 222                 break;
 223         case (CONFIG_SYS_FLASH_WORD_SIZE)SST_MANUFACT:
 224                 info->flash_id = FLASH_MAN_SST;
 225                 break;
 226         case (CONFIG_SYS_FLASH_WORD_SIZE)STM_MANUFACT:
 227                 info->flash_id = FLASH_MAN_STM;
 228                 break;
 229         default:
 230                 info->flash_id = FLASH_UNKNOWN;
 231                 info->sector_count = 0;
 232                 info->size = 0;
 233                 return (0);                     /* no or unknown flash  */
 234         }
 235
 236         value = addr2[CONFIG_SYS_FLASH_READ1];          /* device ID            */
 237
 238         switch (value) {
 239         case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV400T:
 240                 info->flash_id += FLASH_AM400T;
 241                 info->sector_count = 11;
 242                 info->size = 0x00080000;
 243                 break;                          /* => 0.5 MB            */
 244
 245         case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV400B:
 246                 info->flash_id += FLASH_AM400B;
 247                 info->sector_count = 11;
 248                 info->size = 0x00080000;
 249                 break;                          /* => 0.5 MB            */
 250
 251         case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV800T:
 252                 info->flash_id += FLASH_AM800T;
 253                 info->sector_count = 19;
 254                 info->size = 0x00100000;
 255                 break;                          /* => 1 MB              */
 256
 257         case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV800B:
 258                 info->flash_id += FLASH_AM800B;
 259                 info->sector_count = 19;
 260                 info->size = 0x00100000;
 261                 break;                          /* => 1 MB              */
 262
 263         case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV160T:
 264                 info->flash_id += FLASH_AM160T;
 265                 info->sector_count = 35;
 266                 info->size = 0x00200000;
 267                 break;                          /* => 2 MB              */
 268
 269         case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV160B:
 270                 info->flash_id += FLASH_AM160B;
 271                 info->sector_count = 35;
 272                 info->size = 0x00200000;
 273                 break;                          /* => 2 MB              */
 274
 275         case (CONFIG_SYS_FLASH_WORD_SIZE)STM_ID_29W320DT:
 276                 info->flash_id += FLASH_STMW320DT;
 277                 info->sector_count = 67;
 278                 info->size = 0x00400000;  break;        /* => 4 MB      */
 279
 280         case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV320T:
 281                 info->flash_id += FLASH_AM320T;
 282                 info->sector_count = 71;
 283                 info->size = 0x00400000;  break;        /* => 4 MB      */
 284
 285         case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV320B:
 286                 info->flash_id += FLASH_AM320B;
 287                 info->sector_count = 71;
 288                 info->size = 0x00400000;  break;        /* => 4 MB      */
 289
 290         case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_DL322T:
 291                 info->flash_id += FLASH_AMDL322T;
 292                 info->sector_count = 71;
 293                 info->size = 0x00400000;  break;        /* => 4 MB      */
 294
 295         case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_DL322B:
 296                 info->flash_id += FLASH_AMDL322B;
 297                 info->sector_count = 71;
 298                 info->size = 0x00400000;  break;        /* => 4 MB      */
 299
 300         case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_DL323T:
 301                 info->flash_id += FLASH_AMDL323T;
 302                 info->sector_count = 71;
 303                 info->size = 0x00400000;  break;        /* => 4 MB      */
 304
 305         case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_DL323B:
 306                 info->flash_id += FLASH_AMDL323B;
 307                 info->sector_count = 71;
 308                 info->size = 0x00400000;  break;        /* => 4 MB      */
 309
 310         case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV640U:
 311                 info->flash_id += FLASH_AM640U;
 312                 info->sector_count = 128;
 313                 info->size = 0x00800000;  break;        /* => 8 MB      */
 314
 315         case (CONFIG_SYS_FLASH_WORD_SIZE)SST_ID_xF800A:
 316                 info->flash_id += FLASH_SST800A;
 317                 info->sector_count = 16;
 318                 info->size = 0x00100000;
 319                 break;                          /* => 1 MB              */
 320
 321         case (CONFIG_SYS_FLASH_WORD_SIZE)SST_ID_xF160A:
 322                 info->flash_id += FLASH_SST160A;
 323                 info->sector_count = 32;
 324                 info->size = 0x00200000;
 325                 break;                          /* => 2 MB              */
 326
 327         default:
 328                 info->flash_id = FLASH_UNKNOWN;
 329                 return (0);                     /* => no or unknown flash */
 330
 331         }
 332
 333         /* set up sector start address table */
 334         if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||
 335             ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM640U)) {
 336             for (i = 0; i < info->sector_count; i++)
 337                 info->start[i] = base + (i * 0x00010000);
 338         } else if (((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL322B) ||
 339                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL323B) ||
 340                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320B) ||
 341                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL324B)) {
 342                 /* set sector offsets for bottom boot block type        */
 343                 for (i=0; i<8; ++i) {           /*  8 x 8k boot sectors */
 344                         info->start[i] = base;
 345                         base += 8 << 10;
 346                 }
 347                 while (i < info->sector_count) {        /* 64k regular sectors  */
 348                         info->start[i] = base;
 349                         base += 64 << 10;
 350                         ++i;
 351                 }
 352         } else if (((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL322T) ||
 353                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL323T) ||
 354                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320T) ||
 355                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL324T)) {
 356                 /* set sector offsets for top boot block type           */
 357                 base += info->size;
 358                 i = info->sector_count;
 359                 for (n=0; n<8; ++n) {           /*  8 x 8k boot sectors */
 360                         base -= 8 << 10;
 361                         --i;
 362                         info->start[i] = base;
 363                 }
 364                 while (i > 0) {                 /* 64k regular sectors  */
 365                         base -= 64 << 10;
 366                         --i;
 367                         info->start[i] = base;
 368                 }
 369         } else if ((info->flash_id & FLASH_TYPEMASK) == FLASH_STMW320DT) {
 370                 /* set sector offsets for top boot block type           */
 371                 base += info->size;
 372                 i = info->sector_count;
 373                 /*  1 x 16k boot sector */
 374                 base -= 16 << 10;
 375                 --i;
 376                 info->start[i] = base;
 377                 /*  2 x 8k  boot sectors */
 378                 for (n=0; n<2; ++n) {
 379                         base -= 8 << 10;
 380                         --i;
 381                         info->start[i] = base;
 382                 }
 383                 /*  1 x 32k boot sector */
 384                 base -= 32 << 10;
 385                 --i;
 386                 info->start[i] = base;
 387
 388                 while (i > 0) {                 /* 64k regular sectors  */
 389                         base -= 64 << 10;
 390                         --i;
 391                         info->start[i] = base;
 392                 }
 393         } else {
 394             if (info->flash_id & FLASH_BTYPE) {
 395                 /* set sector offsets for bottom boot block type        */
 396                 info->start[0] = base + 0x00000000;
 397                 info->start[1] = base + 0x00004000;
 398                 info->start[2] = base + 0x00006000;
 399                 info->start[3] = base + 0x00008000;
 400                 for (i = 4; i < info->sector_count; i++) {
 401                         info->start[i] = base + (i * 0x00010000) - 0x00030000;
 402                 }
 403             } else {
 404                 /* set sector offsets for top boot block type           */
 405                 i = info->sector_count - 1;
 406                 info->start[i--] = base + info->size - 0x00004000;
 407                 info->start[i--] = base + info->size - 0x00006000;
 408                 info->start[i--] = base + info->size - 0x00008000;
 409                 for (; i >= 0; i--) {
 410                         info->start[i] = base + i * 0x00010000;
 411                 }
 412             }
 413         }
 414
 415         /* check for protected sectors */
 416         for (i = 0; i < info->sector_count; i++) {
 417                 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
 418                 /* D0 = 1 if protected */
 419                 addr2 = (volatile CONFIG_SYS_FLASH_WORD_SIZE *)(info->start[i]);
 420                 if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST)
 421                   info->protect[i] = 0;
 422                 else
 423                   info->protect[i] = addr2[CONFIG_SYS_FLASH_READ2] & 1;
 424         }
 425
 426         /*
 427          * Prevent writes to uninitialized FLASH.
 428          */
 429         if (info->flash_id != FLASH_UNKNOWN) {
 430                 addr2 = (CONFIG_SYS_FLASH_WORD_SIZE *)info->start[0];
 431                 *addr2 = (CONFIG_SYS_FLASH_WORD_SIZE)0x00F000F0;        /* reset bank */
 432         }
 433
 434         return (info->size);
 435 }
 436
 437
 438 /*-----------------------------------------------------------------------
 439  */
 440
 441 int     flash_erase (flash_info_t *info, int s_first, int s_last)
 442 {
 443         volatile CONFIG_SYS_FLASH_WORD_SIZE *addr = (CONFIG_SYS_FLASH_WORD_SIZE *)(info->start[0]);
 444         volatile CONFIG_SYS_FLASH_WORD_SIZE *addr2;
 445         int flag, prot, sect, l_sect;
 446         ulong start, now, last;
 447         int i;
 448
 449         if ((s_first < 0) || (s_first > s_last)) {
 450                 if (info->flash_id == FLASH_UNKNOWN) {
 451                         printf ("- missing\n");
 452                 } else {
 453                         printf ("- no sectors to erase\n");
 454                 }
 455                 return 1;
 456         }
 457
 458         if (info->flash_id == FLASH_UNKNOWN) {
 459                 printf ("Can't erase unknown flash type - aborted\n");
 460                 return 1;
 461         }
 462
 463         prot = 0;
 464         for (sect=s_first; sect<=s_last; ++sect) {
 465                 if (info->protect[sect]) {
 466                         prot++;
 467                 }
 468         }
 469
 470         if (prot) {
 471                 printf ("- Warning: %d protected sectors will not be erased!\n",
 472                         prot);
 473         } else {
 474                 printf ("\n");
 475         }
 476
 477         l_sect = -1;
 478
 479         /* Disable interrupts which might cause a timeout here */
 480         flag = disable_interrupts();
 481
 482         /* Start erase on unprotected sectors */
 483         for (sect = s_first; sect<=s_last; sect++) {
 484                 if (info->protect[sect] == 0) { /* not protected */
 485                     addr2 = (CONFIG_SYS_FLASH_WORD_SIZE *)(info->start[sect]);
 486                     if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) {
 487                         addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00AA00AA;
 488                         addr[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00550055;
 489                         addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00800080;
 490                         addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00AA00AA;
 491                         addr[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00550055;
 492                         addr2[0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00500050;  /* block erase */
 493                         for (i=0; i<50; i++)
 494                           udelay(1000);  /* wait 1 ms */
 495                     } else {
 496                         if (sect == s_first) {
 497                             addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00AA00AA;
 498                             addr[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00550055;
 499                             addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00800080;
 500                             addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00AA00AA;
 501                             addr[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00550055;
 502                         }
 503                         addr2[0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00300030;  /* sector erase */
 504                     }
 505                     l_sect = sect;
 506                 }
 507         }
 508
 509         /* re-enable interrupts if necessary */
 510         if (flag)
 511                 enable_interrupts();
 512
 513         /* wait at least 80us - let's wait 1 ms */
 514         udelay (1000);
 515
 516         /*
 517          * We wait for the last triggered sector
 518          */
 519         if (l_sect < 0)
 520                 goto DONE;
 521
 522         start = get_timer (0);
 523         last  = start;
 524         addr = (CONFIG_SYS_FLASH_WORD_SIZE *)(info->start[l_sect]);
 525         while ((addr[0] & (CONFIG_SYS_FLASH_WORD_SIZE)0x00800080) != (CONFIG_SYS_FLASH_WORD_SIZE)0x00800080) {
 526                 if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 527                         printf ("Timeout\n");
 528                         return 1;
 529                 }
 530                 /* show that we're waiting */
 531                 if ((now - last) > 1000) {      /* every second */
 532                         putc ('.');
 533                         last = now;
 534                 }
 535         }
 536
 537 DONE:
 538         /* reset to read mode */
 539         addr = (CONFIG_SYS_FLASH_WORD_SIZE *)info->start[0];
 540         addr[0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00F000F0;       /* reset bank */
 541
 542         printf (" done\n");
 543         return 0;
 544 }
 545
 546 /*-----------------------------------------------------------------------
 547  * Copy memory to flash, returns:
 548  * 0 - OK
 549  * 1 - write timeout
 550  * 2 - Flash not erased
 551  */
 552
 553 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 554 {
 555         ulong cp, wp, data;
 556         int i, l, rc;
 557
 558         wp = (addr & ~3);       /* get lower word aligned address */
 559
 560         /*
 561          * handle unaligned start bytes
 562          */
 563         if ((l = addr - wp) != 0) {
 564                 data = 0;
 565                 for (i=0, cp=wp; i<l; ++i, ++cp) {
 566 #ifdef CONFIG_B2
 567                         data = data | ((*(uchar *)cp)<<(8*i));
 568 #else
 569                         data = (data << 8) | (*(uchar *)cp);
 570 #endif
 571                 }
 572                 for (; i<4 && cnt>0; ++i) {
 573 #ifdef CONFIG_B2
 574                         data = data  | ((*src++)<<(8*i));
 575 #else
 576                         data = (data << 8) | *src++;
 577 #endif
 578                         --cnt;
 579                         ++cp;
 580                 }
 581                 for (; cnt==0 && i<4; ++i, ++cp) {
 582 #ifdef CONFIG_B2
 583                         data = data | ((*(uchar *)cp)<<(8*i));
 584 #else
 585                         data = (data << 8) | (*(uchar *)cp);
 586 #endif
 587                 }
 588
 589                 if ((rc = write_word(info, wp, data)) != 0) {
 590                         return (rc);
 591                 }
 592                 wp += 4;
 593         }
 594
 595         /*
 596          * handle word aligned part
 597          */
 598         while (cnt >= 4) {
 599                 data = 0;
 600 #ifdef CONFIG_B2
 601                 data = (*(ulong*)src);
 602                 src += 4;
 603 #else
 604                 for (i=0; i<4; ++i) {
 605                         data = (data << 8) | *src++;
 606                 }
 607 #endif
 608                 if ((rc = write_word(info, wp, data)) != 0) {
 609                         return (rc);
 610                 }
 611                 wp  += 4;
 612                 cnt -= 4;
 613         }
 614
 615         if (cnt == 0) {
 616                 return (0);
 617         }
 618
 619         /*
 620          * handle unaligned tail bytes
 621          */
 622         data = 0;
 623         for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
 624 #ifdef CONFIG_B2
 625                 data = data  | ((*src++)<<(8*i));
 626 #else
 627                 data = (data << 8) | *src++;
 628 #endif
 629                 --cnt;
 630         }
 631         for (; i<4; ++i, ++cp) {
 632 #ifdef CONFIG_B2
 633                 data = data | ((*(uchar *)cp)<<(8*i));
 634 #else
 635                 data = (data << 8) | (*(uchar *)cp);
 636 #endif
 637         }
 638
 639         return (write_word(info, wp, data));
 640 }
 641
 642 /*-----------------------------------------------------------------------
 643  * Write a word to Flash, returns:
 644  * 0 - OK
 645  * 1 - write timeout
 646  * 2 - Flash not erased
 647  */
 648 static int write_word (flash_info_t *info, ulong dest, ulong data)
 649 {
 650         ulong *data_ptr = &data;
 651         volatile CONFIG_SYS_FLASH_WORD_SIZE *addr2 = (CONFIG_SYS_FLASH_WORD_SIZE *)(info->start[0]);
 652         volatile CONFIG_SYS_FLASH_WORD_SIZE *dest2 = (CONFIG_SYS_FLASH_WORD_SIZE *)dest;
 653         volatile CONFIG_SYS_FLASH_WORD_SIZE *data2 = (CONFIG_SYS_FLASH_WORD_SIZE *)data_ptr;
 654         ulong start;
 655         int flag;
 656         int i;
 657
 658         /* Check if Flash is (sufficiently) erased */
 659         if ((*((volatile ulong *)dest) & data) != data) {
 660                 return (2);
 661         }
 662         /* Disable interrupts which might cause a timeout here */
 663         flag = disable_interrupts();
 664
 665         for (i=0; i<4/sizeof(CONFIG_SYS_FLASH_WORD_SIZE); i++)
 666           {
 667             addr2[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00AA00AA;
 668             addr2[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00550055;
 669             addr2[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00A000A0;
 670
 671             dest2[i] = data2[i];
 672
 673             /* re-enable interrupts if necessary */
 674             if (flag)
 675               enable_interrupts();
 676
 677             /* data polling for D7 */
 678             start = get_timer (0);
 679             while ((dest2[i] & (CONFIG_SYS_FLASH_WORD_SIZE)0x00800080) !=
 680                    (data2[i] & (CONFIG_SYS_FLASH_WORD_SIZE)0x00800080)) {
 681               if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
 682                 return (1);
 683               }
 684             }
 685           }
 686
 687         return (0);
 688 }
 689
 690 /*-----------------------------------------------------------------------
 691  */