board/esd/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 #ifdef __PPC__
  10 #include <asm/ppc4xx.h>
  11 #endif
  12 #include <asm/processor.h>
  13
  14 flash_info_t    flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
  15
  16 /*-----------------------------------------------------------------------
  17  * Functions
  18  */
  19 static int write_word (flash_info_t *info, ulong dest, ulong data);
  20
  21 /*-----------------------------------------------------------------------
  22  */
  23 static void flash_get_offsets (ulong base, flash_info_t *info)
  24 {
  25         int i;
  26         short n;
  27
  28         /* set up sector start address table */
  29         if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||
  30             ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM640U)) {
  31             for (i = 0; i < info->sector_count; i++)
  32                 info->start[i] = base + (i * 0x00010000);
  33         } else if (((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL322B) ||
  34                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL323B) ||
  35                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320B) ||
  36                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL324B)) {
  37                 /* set sector offsets for bottom boot block type        */
  38                 for (i=0; i<8; ++i) {           /*  8 x 8k boot sectors */
  39                         info->start[i] = base;
  40                         base += 8 << 10;
  41                 }
  42                 while (i < info->sector_count) {        /* 64k regular sectors  */
  43                         info->start[i] = base;
  44                         base += 64 << 10;
  45                         ++i;
  46                 }
  47         } else if (((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL322T) ||
  48                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL323T) ||
  49                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320T) ||
  50                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL324T)) {
  51                 /* set sector offsets for top boot block type           */
  52                 base += info->size;
  53                 i = info->sector_count;
  54                 for (n=0; n<8; ++n) {           /*  8 x 8k boot sectors */
  55                         base -= 8 << 10;
  56                         --i;
  57                         info->start[i] = base;
  58                 }
  59                 while (i > 0) {                 /* 64k regular sectors  */
  60                         base -= 64 << 10;
  61                         --i;
  62                         info->start[i] = base;
  63                 }
  64         } else {
  65             if (info->flash_id & FLASH_BTYPE) {
  66                 /* set sector offsets for bottom boot block type        */
  67                 info->start[0] = base + 0x00000000;
  68                 info->start[1] = base + 0x00004000;
  69                 info->start[2] = base + 0x00006000;
  70                 info->start[3] = base + 0x00008000;
  71                 for (i = 4; i < info->sector_count; i++) {
  72                         info->start[i] = base + (i * 0x00010000) - 0x00030000;
  73                 }
  74             } else {
  75                 /* set sector offsets for top boot block type           */
  76                 i = info->sector_count - 1;
  77                 info->start[i--] = base + info->size - 0x00004000;
  78                 info->start[i--] = base + info->size - 0x00006000;
  79                 info->start[i--] = base + info->size - 0x00008000;
  80                 for (; i >= 0; i--) {
  81                         info->start[i] = base + i * 0x00010000;
  82                 }
  83             }
  84         }
  85 }
  86
  87 /*-----------------------------------------------------------------------
  88  */
  89 void flash_print_info  (flash_info_t *info)
  90 {
  91         int i;
  92         int k;
  93         int size;
  94         int erased;
  95         volatile unsigned long *flash;
  96
  97         if (info->flash_id == FLASH_UNKNOWN) {
  98                 printf ("missing or unknown FLASH type\n");
  99                 return;
 100         }
 101
 102         switch (info->flash_id & FLASH_VENDMASK) {
 103         case FLASH_MAN_AMD:     printf ("AMD ");                break;
 104         case FLASH_MAN_FUJ:     printf ("FUJITSU ");            break;
 105         case FLASH_MAN_SST:     printf ("SST ");                break;
 106         case FLASH_MAN_EXCEL:   printf ("Excel Semiconductor "); break;
 107         default:                printf ("Unknown Vendor ");     break;
 108         }
 109
 110         switch (info->flash_id & FLASH_TYPEMASK) {
 111         case FLASH_AM400B:      printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
 112                                 break;
 113         case FLASH_AM400T:      printf ("AM29LV400T (4 Mbit, top boot sector)\n");
 114                                 break;
 115         case FLASH_AM800B:      printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
 116                                 break;
 117         case FLASH_AM800T:      printf ("AM29LV800T (8 Mbit, top boot sector)\n");
 118                                 break;
 119         case FLASH_AM160B:      printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
 120                                 break;
 121         case FLASH_AM160T:      printf ("AM29LV160T (16 Mbit, top boot sector)\n");
 122                                 break;
 123         case FLASH_AM320T:      printf ("AM29LV320T (32 M, top sector)\n");
 124                                 break;
 125         case FLASH_AM320B:      printf ("AM29LV320B (32 M, bottom sector)\n");
 126                                 break;
 127         case FLASH_AMDL322T:    printf ("AM29DL322T (32 M, top sector)\n");
 128                                 break;
 129         case FLASH_AMDL322B:    printf ("AM29DL322B (32 M, bottom sector)\n");
 130                                 break;
 131         case FLASH_AMDL323T:    printf ("AM29DL323T (32 M, top sector)\n");
 132                                 break;
 133         case FLASH_AMDL323B:    printf ("AM29DL323B (32 M, bottom sector)\n");
 134                                 break;
 135         case FLASH_AM640U:      printf ("AM29LV640D (64 M, uniform sector)\n");
 136                                 break;
 137         case FLASH_SST800A:     printf ("SST39LF/VF800 (8 Mbit, uniform sector size)\n");
 138                                 break;
 139         case FLASH_SST160A:     printf ("SST39LF/VF160 (16 Mbit, uniform sector size)\n");
 140                                 break;
 141         case FLASH_SST320:      printf ("SST39LF/VF320 (32 Mbit, uniform sector size)\n");
 142                                 break;
 143         case FLASH_SST640:      printf ("SST39LF/VF640 (64 Mbit, uniform sector size)\n");
 144                                 break;
 145         default:                printf ("Unknown Chip Type\n");
 146                                 break;
 147         }
 148
 149         printf ("  Size: %ld MB in %d Sectors\n",
 150                 info->size >> 20, info->sector_count);
 151
 152         printf ("  Sector Start Addresses:");
 153         for (i=0; i<info->sector_count; ++i) {
 154 #ifdef CONFIG_SYS_FLASH_EMPTY_INFO
 155                 /*
 156                  * Check if whole sector is erased
 157                  */
 158                 if (i != (info->sector_count-1))
 159                   size = info->start[i+1] - info->start[i];
 160                 else
 161                   size = info->start[0] + info->size - info->start[i];
 162                 erased = 1;
 163                 flash = (volatile unsigned long *)info->start[i];
 164                 size = size >> 2;        /* divide by 4 for longword access */
 165                 for (k=0; k<size; k++)
 166                   {
 167                     if (*flash++ != 0xffffffff)
 168                       {
 169                         erased = 0;
 170                         break;
 171                       }
 172                   }
 173
 174                 if ((i % 5) == 0)
 175                         printf ("\n   ");
 176                 /* print empty and read-only info */
 177                 printf (" %08lX%s%s",
 178                         info->start[i],
 179                         erased ? " E" : "  ",
 180                         info->protect[i] ? "RO " : "   ");
 181 #else
 182                 if ((i % 5) == 0)
 183                         printf ("\n   ");
 184                 printf (" %08lX%s",
 185                         info->start[i],
 186                         info->protect[i] ? " (RO)" : "     ");
 187 #endif
 188
 189         }
 190         printf ("\n");
 191         return;
 192 }
 193
 194 /*-----------------------------------------------------------------------
 195  */
 196
 197
 198 /*-----------------------------------------------------------------------
 199  */
 200
 201 /*
 202  * The following code cannot be run from FLASH!
 203  */
 204 static ulong flash_get_size (vu_long *addr, flash_info_t *info)
 205 {
 206         short i;
 207         short n;
 208         CONFIG_SYS_FLASH_WORD_SIZE value;
 209         ulong base = (ulong)addr;
 210         volatile CONFIG_SYS_FLASH_WORD_SIZE *addr2 = (CONFIG_SYS_FLASH_WORD_SIZE *)addr;
 211
 212         /* Write auto select command: read Manufacturer ID */
 213         addr2[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00AA00AA;
 214         addr2[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00550055;
 215         addr2[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00900090;
 216
 217         value = addr2[CONFIG_SYS_FLASH_READ0];
 218
 219         switch (value) {
 220         case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_MANUFACT:
 221                 info->flash_id = FLASH_MAN_AMD;
 222                 break;
 223         case (CONFIG_SYS_FLASH_WORD_SIZE)FUJ_MANUFACT:
 224                 info->flash_id = FLASH_MAN_FUJ;
 225                 break;
 226         case (CONFIG_SYS_FLASH_WORD_SIZE)SST_MANUFACT:
 227                 info->flash_id = FLASH_MAN_SST;
 228                 break;
 229         case (CONFIG_SYS_FLASH_WORD_SIZE)EXCEL_MANUFACT:
 230                 info->flash_id = FLASH_MAN_EXCEL;
 231                 break;
 232         default:
 233                 info->flash_id = FLASH_UNKNOWN;
 234                 info->sector_count = 0;
 235                 info->size = 0;
 236                 return (0);                     /* no or unknown flash  */
 237         }
 238
 239         value = addr2[CONFIG_SYS_FLASH_READ1];          /* device ID            */
 240
 241         switch (value) {
 242         case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV400T:
 243                 info->flash_id += FLASH_AM400T;
 244                 info->sector_count = 11;
 245                 info->size = 0x00080000;
 246                 break;                          /* => 0.5 MB            */
 247
 248         case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV400B:
 249                 info->flash_id += FLASH_AM400B;
 250                 info->sector_count = 11;
 251                 info->size = 0x00080000;
 252                 break;                          /* => 0.5 MB            */
 253
 254         case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV800T:
 255                 info->flash_id += FLASH_AM800T;
 256                 info->sector_count = 19;
 257                 info->size = 0x00100000;
 258                 break;                          /* => 1 MB              */
 259
 260         case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV800B:
 261                 info->flash_id += FLASH_AM800B;
 262                 info->sector_count = 19;
 263                 info->size = 0x00100000;
 264                 break;                          /* => 1 MB              */
 265
 266         case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV160T:
 267                 info->flash_id += FLASH_AM160T;
 268                 info->sector_count = 35;
 269                 info->size = 0x00200000;
 270                 break;                          /* => 2 MB              */
 271
 272         case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV160B:
 273                 info->flash_id += FLASH_AM160B;
 274                 info->sector_count = 35;
 275                 info->size = 0x00200000;
 276                 break;                          /* => 2 MB              */
 277
 278         case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV320T:
 279                 info->flash_id += FLASH_AM320T;
 280                 info->sector_count = 71;
 281                 info->size = 0x00400000;  break;        /* => 4 MB      */
 282
 283         case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV320B:
 284                 info->flash_id += FLASH_AM320B;
 285                 info->sector_count = 71;
 286                 info->size = 0x00400000;  break;        /* => 4 MB      */
 287
 288         case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_DL322T:
 289                 info->flash_id += FLASH_AMDL322T;
 290                 info->sector_count = 71;
 291                 info->size = 0x00400000;  break;        /* => 4 MB      */
 292
 293         case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_DL322B:
 294                 info->flash_id += FLASH_AMDL322B;
 295                 info->sector_count = 71;
 296                 info->size = 0x00400000;  break;        /* => 4 MB      */
 297
 298         case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_DL323T:
 299                 info->flash_id += FLASH_AMDL323T;
 300                 info->sector_count = 71;
 301                 info->size = 0x00400000;  break;        /* => 4 MB      */
 302
 303         case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_DL323B:
 304                 info->flash_id += FLASH_AMDL323B;
 305                 info->sector_count = 71;
 306                 info->size = 0x00400000;  break;        /* => 4 MB      */
 307
 308         case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV640U:
 309                 info->flash_id += FLASH_AM640U;
 310                 info->sector_count = 128;
 311                 info->size = 0x00800000;  break;        /* => 8 MB      */
 312
 313 #if !(defined(CONFIG_ADCIOP) || defined(CONFIG_DASA_SIM))
 314         case (CONFIG_SYS_FLASH_WORD_SIZE)SST_ID_xF800A:
 315                 info->flash_id += FLASH_SST800A;
 316                 info->sector_count = 16;
 317                 info->size = 0x00100000;
 318                 break;                          /* => 1 MB              */
 319
 320         case (CONFIG_SYS_FLASH_WORD_SIZE)SST_ID_xF160A:
 321         case (CONFIG_SYS_FLASH_WORD_SIZE)SST_ID_xF1601:
 322         case (CONFIG_SYS_FLASH_WORD_SIZE)SST_ID_xF1602:
 323                 info->flash_id += FLASH_SST160A;
 324                 info->sector_count = 32;
 325                 info->size = 0x00200000;
 326                 break;                          /* => 2 MB              */
 327
 328         case (CONFIG_SYS_FLASH_WORD_SIZE)SST_ID_xF3201:
 329         case (CONFIG_SYS_FLASH_WORD_SIZE)SST_ID_xF3202:
 330                 info->flash_id += FLASH_SST320;
 331                 info->sector_count = 64;
 332                 info->size = 0x00400000;
 333                 break;                          /* => 4 MB              */
 334
 335         case (CONFIG_SYS_FLASH_WORD_SIZE)SST_ID_xF6401:
 336         case (CONFIG_SYS_FLASH_WORD_SIZE)SST_ID_xF6402:
 337                 info->flash_id += FLASH_SST640;
 338                 info->sector_count = 128;
 339                 info->size = 0x00800000;
 340                 break;                          /* => 8 MB              */
 341 #endif
 342
 343         default:
 344                 info->flash_id = FLASH_UNKNOWN;
 345                 return (0);                     /* => no or unknown flash */
 346
 347         }
 348
 349         /* set up sector start address table */
 350         if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||
 351             ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM640U)) {
 352             for (i = 0; i < info->sector_count; i++)
 353                 info->start[i] = base + (i * 0x00010000);
 354         } else if (((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL322B) ||
 355                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL323B) ||
 356                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320B) ||
 357                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL324B)) {
 358                 /* set sector offsets for bottom boot block type        */
 359                 for (i=0; i<8; ++i) {           /*  8 x 8k boot sectors */
 360                         info->start[i] = base;
 361                         base += 8 << 10;
 362                 }
 363                 while (i < info->sector_count) {        /* 64k regular sectors  */
 364                         info->start[i] = base;
 365                         base += 64 << 10;
 366                         ++i;
 367                 }
 368         } else if (((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL322T) ||
 369                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL323T) ||
 370                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320T) ||
 371                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL324T)) {
 372                 /* set sector offsets for top boot block type           */
 373                 base += info->size;
 374                 i = info->sector_count;
 375                 for (n=0; n<8; ++n) {           /*  8 x 8k boot sectors */
 376                         base -= 8 << 10;
 377                         --i;
 378                         info->start[i] = base;
 379                 }
 380                 while (i > 0) {                 /* 64k regular sectors  */
 381                         base -= 64 << 10;
 382                         --i;
 383                         info->start[i] = base;
 384                 }
 385         } else {
 386             if (info->flash_id & FLASH_BTYPE) {
 387                 /* set sector offsets for bottom boot block type        */
 388                 info->start[0] = base + 0x00000000;
 389                 info->start[1] = base + 0x00004000;
 390                 info->start[2] = base + 0x00006000;
 391                 info->start[3] = base + 0x00008000;
 392                 for (i = 4; i < info->sector_count; i++) {
 393                         info->start[i] = base + (i * 0x00010000) - 0x00030000;
 394                 }
 395             } else {
 396                 /* set sector offsets for top boot block type           */
 397                 i = info->sector_count - 1;
 398                 info->start[i--] = base + info->size - 0x00004000;
 399                 info->start[i--] = base + info->size - 0x00006000;
 400                 info->start[i--] = base + info->size - 0x00008000;
 401                 for (; i >= 0; i--) {
 402                         info->start[i] = base + i * 0x00010000;
 403                 }
 404             }
 405         }
 406
 407         /* check for protected sectors */
 408         for (i = 0; i < info->sector_count; i++) {
 409                 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
 410                 /* D0 = 1 if protected */
 411                 addr2 = (volatile CONFIG_SYS_FLASH_WORD_SIZE *)(info->start[i]);
 412                 if ((info->flash_id & FLASH_VENDMASK) != FLASH_MAN_AMD)
 413                   info->protect[i] = 0;
 414                 else
 415                   info->protect[i] = addr2[CONFIG_SYS_FLASH_READ2] & 1;
 416         }
 417
 418         /*
 419          * Prevent writes to uninitialized FLASH.
 420          */
 421         if (info->flash_id != FLASH_UNKNOWN) {
 422                 addr2 = (CONFIG_SYS_FLASH_WORD_SIZE *)info->start[0];
 423                 *addr2 = (CONFIG_SYS_FLASH_WORD_SIZE)0x00F000F0;        /* reset bank */
 424         }
 425
 426         return (info->size);
 427 }
 428
 429
 430 /*-----------------------------------------------------------------------
 431  */
 432
 433 int     flash_erase (flash_info_t *info, int s_first, int s_last)
 434 {
 435         volatile CONFIG_SYS_FLASH_WORD_SIZE *addr = (CONFIG_SYS_FLASH_WORD_SIZE *)(info->start[0]);
 436         volatile CONFIG_SYS_FLASH_WORD_SIZE *addr2;
 437         int flag, prot, sect, l_sect;
 438         ulong start, now, last;
 439         int i;
 440
 441         if ((s_first < 0) || (s_first > s_last)) {
 442                 if (info->flash_id == FLASH_UNKNOWN) {
 443                         printf ("- missing\n");
 444                 } else {
 445                         printf ("- no sectors to erase\n");
 446                 }
 447                 return 1;
 448         }
 449
 450         if (info->flash_id == FLASH_UNKNOWN) {
 451                 printf ("Can't erase unknown flash type - aborted\n");
 452                 return 1;
 453         }
 454
 455         prot = 0;
 456         for (sect=s_first; sect<=s_last; ++sect) {
 457                 if (info->protect[sect]) {
 458                         prot++;
 459                 }
 460         }
 461
 462         if (prot) {
 463                 printf ("- Warning: %d protected sectors will not be erased!\n",
 464                         prot);
 465         } else {
 466                 printf ("\n");
 467         }
 468
 469         l_sect = -1;
 470
 471         /* Disable interrupts which might cause a timeout here */
 472         flag = disable_interrupts();
 473
 474         /* Start erase on unprotected sectors */
 475         for (sect = s_first; sect<=s_last; sect++) {
 476                 if (info->protect[sect] == 0) { /* not protected */
 477                     addr2 = (CONFIG_SYS_FLASH_WORD_SIZE *)(info->start[sect]);
 478                     if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) {
 479                         addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00AA00AA;
 480                         addr[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00550055;
 481                         addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00800080;
 482                         addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00AA00AA;
 483                         addr[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00550055;
 484                         addr2[0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00500050;  /* block erase */
 485                         for (i=0; i<50; i++)
 486                           udelay(1000);  /* wait 1 ms */
 487                     } else {
 488                         if (sect == s_first) {
 489                             addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00AA00AA;
 490                             addr[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00550055;
 491                             addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00800080;
 492                             addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00AA00AA;
 493                             addr[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00550055;
 494                         }
 495                         addr2[0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00300030;  /* sector erase */
 496                     }
 497                     l_sect = sect;
 498                 }
 499         }
 500
 501         /* re-enable interrupts if necessary */
 502         if (flag)
 503                 enable_interrupts();
 504
 505         /* wait at least 80us - let's wait 1 ms */
 506         udelay (1000);
 507
 508         /*
 509          * We wait for the last triggered sector
 510          */
 511         if (l_sect < 0)
 512                 goto DONE;
 513
 514         start = get_timer (0);
 515         last  = start;
 516         addr = (CONFIG_SYS_FLASH_WORD_SIZE *)(info->start[l_sect]);
 517         while ((addr[0] & (CONFIG_SYS_FLASH_WORD_SIZE)0x00800080) != (CONFIG_SYS_FLASH_WORD_SIZE)0x00800080) {
 518                 if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 519                         printf ("Timeout\n");
 520                         return 1;
 521                 }
 522                 /* show that we're waiting */
 523                 if ((now - last) > 1000) {      /* every second */
 524                         putc ('.');
 525                         last = now;
 526                 }
 527         }
 528
 529 DONE:
 530         /* reset to read mode */
 531         addr = (CONFIG_SYS_FLASH_WORD_SIZE *)info->start[0];
 532         addr[0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00F000F0;       /* reset bank */
 533
 534         printf (" done\n");
 535         return 0;
 536 }
 537
 538 /*-----------------------------------------------------------------------
 539  * Copy memory to flash, returns:
 540  * 0 - OK
 541  * 1 - write timeout
 542  * 2 - Flash not erased
 543  */
 544
 545 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 546 {
 547         ulong cp, wp, data;
 548         int i, l, rc;
 549
 550         wp = (addr & ~3);       /* get lower word aligned address */
 551
 552         /*
 553          * handle unaligned start bytes
 554          */
 555         if ((l = addr - wp) != 0) {
 556                 data = 0;
 557                 for (i=0, cp=wp; i<l; ++i, ++cp) {
 558                         data = (data << 8) | (*(uchar *)cp);
 559                 }
 560                 for (; i<4 && cnt>0; ++i) {
 561                         data = (data << 8) | *src++;
 562                         --cnt;
 563                         ++cp;
 564                 }
 565                 for (; cnt==0 && i<4; ++i, ++cp) {
 566                         data = (data << 8) | (*(uchar *)cp);
 567                 }
 568
 569                 if ((rc = write_word(info, wp, data)) != 0) {
 570                         return (rc);
 571                 }
 572                 wp += 4;
 573         }
 574
 575         /*
 576          * handle word aligned part
 577          */
 578         while (cnt >= 4) {
 579                 data = 0;
 580                 for (i=0; i<4; ++i) {
 581                         data = (data << 8) | *src++;
 582                 }
 583                 if ((rc = write_word(info, wp, data)) != 0) {
 584                         return (rc);
 585                 }
 586                 wp  += 4;
 587                 cnt -= 4;
 588         }
 589
 590         if (cnt == 0) {
 591                 return (0);
 592         }
 593
 594         /*
 595          * handle unaligned tail bytes
 596          */
 597         data = 0;
 598         for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
 599                 data = (data << 8) | *src++;
 600                 --cnt;
 601         }
 602         for (; i<4; ++i, ++cp) {
 603                 data = (data << 8) | (*(uchar *)cp);
 604         }
 605
 606         return (write_word(info, wp, data));
 607 }
 608
 609 /*-----------------------------------------------------------------------
 610  * Write a word to Flash, returns:
 611  * 0 - OK
 612  * 1 - write timeout
 613  * 2 - Flash not erased
 614  */
 615 static int write_word (flash_info_t *info, ulong dest, ulong data)
 616 {
 617         ulong *data_ptr = &data;
 618         volatile CONFIG_SYS_FLASH_WORD_SIZE *addr2 = (CONFIG_SYS_FLASH_WORD_SIZE *)(info->start[0]);
 619         volatile CONFIG_SYS_FLASH_WORD_SIZE *dest2 = (CONFIG_SYS_FLASH_WORD_SIZE *)dest;
 620         volatile CONFIG_SYS_FLASH_WORD_SIZE *data2 = (CONFIG_SYS_FLASH_WORD_SIZE *)data_ptr;
 621         ulong start;
 622         int flag;
 623         int i;
 624
 625         /* Check if Flash is (sufficiently) erased */
 626         if ((*((vu_long *)dest) & data) != data) {
 627                 return (2);
 628         }
 629
 630         /* Disable interrupts which might cause a timeout here */
 631         flag = disable_interrupts();
 632
 633         for (i=0; i<4/sizeof(CONFIG_SYS_FLASH_WORD_SIZE); i++)
 634           {
 635             addr2[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00AA00AA;
 636             addr2[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00550055;
 637             addr2[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00A000A0;
 638
 639             dest2[i] = data2[i];
 640
 641             /* re-enable interrupts if necessary */
 642             if (flag)
 643               enable_interrupts();
 644
 645             /* data polling for D7 */
 646             start = get_timer (0);
 647             while ((dest2[i] & (CONFIG_SYS_FLASH_WORD_SIZE)0x00800080) !=
 648                    (data2[i] & (CONFIG_SYS_FLASH_WORD_SIZE)0x00800080)) {
 649               if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
 650                 return (1);
 651               }
 652             }
 653           }
 654
 655         return (0);
 656 }
 657
 658 /*-----------------------------------------------------------------------
 659  */