board/dave/common/flash.c

   1 /*
   2  * (C) Copyright 2001
   3  * Stefan Roese, esd gmbh germany, stefan.roese@esd-electronics.com
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 #include <common.h>
  25 #include <ppc4xx.h>
  26 #include <asm/processor.h>
  27
  28 flash_info_t    flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips        */
  29
  30 /*-----------------------------------------------------------------------
  31  * Functions
  32  */
  33 static int write_word (flash_info_t *info, ulong dest, ulong data);
  34
  35 /*-----------------------------------------------------------------------
  36  */
  37 static void flash_get_offsets (ulong base, flash_info_t *info)
  38 {
  39         int i;
  40         short n;
  41
  42         /* set up sector start address table */
  43         if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||
  44             ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM640U)) {
  45             for (i = 0; i < info->sector_count; i++)
  46                 info->start[i] = base + (i * 0x00010000);
  47         } else if (((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL322B) ||
  48                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL323B) ||
  49                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320B) ||
  50                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL324B)) {
  51                 /* set sector offsets for bottom boot block type        */
  52                 for (i=0; i<8; ++i) {           /*  8 x 8k boot sectors */
  53                         info->start[i] = base;
  54                         base += 8 << 10;
  55                 }
  56                 while (i < info->sector_count) {        /* 64k regular sectors  */
  57                         info->start[i] = base;
  58                         base += 64 << 10;
  59                         ++i;
  60                 }
  61         } else if (((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL322T) ||
  62                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL323T) ||
  63                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320T) ||
  64                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL324T)) {
  65                 /* set sector offsets for top boot block type           */
  66                 base += info->size;
  67                 i = info->sector_count;
  68                 for (n=0; n<8; ++n) {           /*  8 x 8k boot sectors */
  69                         base -= 8 << 10;
  70                         --i;
  71                         info->start[i] = base;
  72                 }
  73                 while (i > 0) {                 /* 64k regular sectors  */
  74                         base -= 64 << 10;
  75                         --i;
  76                         info->start[i] = base;
  77                 }
  78         } else {
  79             if (info->flash_id & FLASH_BTYPE) {
  80                 /* set sector offsets for bottom boot block type        */
  81                 info->start[0] = base + 0x00000000;
  82                 info->start[1] = base + 0x00004000;
  83                 info->start[2] = base + 0x00006000;
  84                 info->start[3] = base + 0x00008000;
  85                 for (i = 4; i < info->sector_count; i++) {
  86                         info->start[i] = base + (i * 0x00010000) - 0x00030000;
  87                 }
  88             } else {
  89                 /* set sector offsets for top boot block type           */
  90                 i = info->sector_count - 1;
  91                 info->start[i--] = base + info->size - 0x00004000;
  92                 info->start[i--] = base + info->size - 0x00006000;
  93                 info->start[i--] = base + info->size - 0x00008000;
  94                 for (; i >= 0; i--) {
  95                         info->start[i] = base + i * 0x00010000;
  96                 }
  97             }
  98         }
  99 }
 100
 101 /*-----------------------------------------------------------------------
 102  */
 103 void flash_print_info  (flash_info_t *info)
 104 {
 105         int i;
 106         int k;
 107         int size;
 108         int erased;
 109         volatile unsigned long *flash;
 110
 111         if (info->flash_id == FLASH_UNKNOWN) {
 112                 printf ("missing or unknown FLASH type\n");
 113                 return;
 114         }
 115
 116         switch (info->flash_id & FLASH_VENDMASK) {
 117         case FLASH_MAN_AMD:     printf ("AMD ");                break;
 118         case FLASH_MAN_FUJ:     printf ("FUJITSU ");            break;
 119         case FLASH_MAN_SST:     printf ("SST ");                break;
 120         case FLASH_MAN_STM:     printf ("ST  ");                break;
 121         default:                printf ("Unknown Vendor ");     break;
 122         }
 123
 124         switch (info->flash_id & FLASH_TYPEMASK) {
 125         case FLASH_AM400B:      printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
 126                                 break;
 127         case FLASH_AM400T:      printf ("AM29LV400T (4 Mbit, top boot sector)\n");
 128                                 break;
 129         case FLASH_AM800B:      printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
 130                                 break;
 131         case FLASH_AM800T:      printf ("AM29LV800T (8 Mbit, top boot sector)\n");
 132                                 break;
 133         case FLASH_AM160B:      printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
 134                                 break;
 135         case FLASH_AM160T:      printf ("AM29LV160T (16 Mbit, top boot sector)\n");
 136                                 break;
 137         case FLASH_AM320T:      printf ("AM29LV320T (32 M, top sector)\n");
 138                                 break;
 139         case FLASH_AM320B:      printf ("AM29LV320B (32 M, bottom sector)\n");
 140                                 break;
 141         case FLASH_AMDL322T:    printf ("AM29DL322T (32 M, top sector)\n");
 142                                 break;
 143         case FLASH_AMDL322B:    printf ("AM29DL322B (32 M, bottom sector)\n");
 144                                 break;
 145         case FLASH_AMDL323T:    printf ("AM29DL323T (32 M, top sector)\n");
 146                                 break;
 147         case FLASH_AMDL323B:    printf ("AM29DL323B (32 M, bottom sector)\n");
 148                                 break;
 149         case FLASH_AM640U:      printf ("AM29LV640D (64 M, uniform sector)\n");
 150                                 break;
 151         case FLASH_SST800A:     printf ("SST39LF/VF800 (8 Mbit, uniform sector size)\n");
 152                                 break;
 153         case FLASH_SST160A:     printf ("SST39LF/VF160 (16 Mbit, uniform sector size)\n");
 154                                 break;
 155         case FLASH_STMW320DT:   printf ("M29W320DT (32 M, top sector)\n");
 156                                 break;
 157         default:                printf ("Unknown Chip Type\n");
 158                                 break;
 159         }
 160
 161         printf ("  Size: %ld MB in %d Sectors\n",
 162                 info->size >> 20, info->sector_count);
 163
 164         printf ("  Sector Start Addresses:");
 165         for (i=0; i<info->sector_count; ++i) {
 166 #ifdef CFG_FLASH_EMPTY_INFO
 167                 /*
 168                  * Check if whole sector is erased
 169                  */
 170                 if (i != (info->sector_count-1))
 171                   size = info->start[i+1] - info->start[i];
 172                 else
 173                   size = info->start[0] + info->size - info->start[i];
 174                 erased = 1;
 175                 flash = (volatile unsigned long *)info->start[i];
 176                 size = size >> 2;        /* divide by 4 for longword access */
 177                 for (k=0; k<size; k++)
 178                   {
 179                     if (*flash++ != 0xffffffff)
 180                       {
 181                         erased = 0;
 182                         break;
 183                       }
 184                   }
 185
 186                 if ((i % 5) == 0)
 187                         printf ("\n   ");
 188                 /* print empty and read-only info */
 189                 printf (" %08lX%s%s",
 190                         info->start[i],
 191                         erased ? " E" : "  ",
 192                         info->protect[i] ? "RO " : "   ");
 193 #else
 194                 if ((i % 5) == 0)
 195                         printf ("\n   ");
 196                 printf (" %08lX%s",
 197                         info->start[i],
 198                         info->protect[i] ? " (RO)" : "     ");
 199 #endif
 200
 201         }
 202         printf ("\n");
 203         return;
 204 }
 205
 206 /*-----------------------------------------------------------------------
 207  */
 208
 209
 210 /*-----------------------------------------------------------------------
 211  */
 212
 213 /*
 214  * The following code cannot be run from FLASH!
 215  */
 216 static ulong flash_get_size (vu_long *addr, flash_info_t *info)
 217 {
 218         short i;
 219         short n;
 220         CFG_FLASH_WORD_SIZE value;
 221         ulong base = (ulong)addr;
 222         volatile CFG_FLASH_WORD_SIZE *addr2 = (CFG_FLASH_WORD_SIZE *)addr;
 223
 224         /* Write auto select command: read Manufacturer ID */
 225         addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00AA00AA;
 226         addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE)0x00550055;
 227         addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00900090;
 228
 229         value = addr2[CFG_FLASH_READ0];
 230
 231         switch (value) {
 232         case (CFG_FLASH_WORD_SIZE)AMD_MANUFACT:
 233                 info->flash_id = FLASH_MAN_AMD;
 234                 break;
 235         case (CFG_FLASH_WORD_SIZE)FUJ_MANUFACT:
 236                 info->flash_id = FLASH_MAN_FUJ;
 237                 break;
 238         case (CFG_FLASH_WORD_SIZE)SST_MANUFACT:
 239                 info->flash_id = FLASH_MAN_SST;
 240                 break;
 241         case (CFG_FLASH_WORD_SIZE)STM_MANUFACT:
 242                 info->flash_id = FLASH_MAN_STM;
 243                 break;
 244         default:
 245                 info->flash_id = FLASH_UNKNOWN;
 246                 info->sector_count = 0;
 247                 info->size = 0;
 248                 return (0);                     /* no or unknown flash  */
 249         }
 250
 251         value = addr2[CFG_FLASH_READ1];         /* device ID            */
 252
 253         switch (value) {
 254         case (CFG_FLASH_WORD_SIZE)AMD_ID_LV400T:
 255                 info->flash_id += FLASH_AM400T;
 256                 info->sector_count = 11;
 257                 info->size = 0x00080000;
 258                 break;                          /* => 0.5 MB            */
 259
 260         case (CFG_FLASH_WORD_SIZE)AMD_ID_LV400B:
 261                 info->flash_id += FLASH_AM400B;
 262                 info->sector_count = 11;
 263                 info->size = 0x00080000;
 264                 break;                          /* => 0.5 MB            */
 265
 266         case (CFG_FLASH_WORD_SIZE)AMD_ID_LV800T:
 267                 info->flash_id += FLASH_AM800T;
 268                 info->sector_count = 19;
 269                 info->size = 0x00100000;
 270                 break;                          /* => 1 MB              */
 271
 272         case (CFG_FLASH_WORD_SIZE)AMD_ID_LV800B:
 273                 info->flash_id += FLASH_AM800B;
 274                 info->sector_count = 19;
 275                 info->size = 0x00100000;
 276                 break;                          /* => 1 MB              */
 277
 278         case (CFG_FLASH_WORD_SIZE)AMD_ID_LV160T:
 279                 info->flash_id += FLASH_AM160T;
 280                 info->sector_count = 35;
 281                 info->size = 0x00200000;
 282                 break;                          /* => 2 MB              */
 283
 284         case (CFG_FLASH_WORD_SIZE)AMD_ID_LV160B:
 285                 info->flash_id += FLASH_AM160B;
 286                 info->sector_count = 35;
 287                 info->size = 0x00200000;
 288                 break;                          /* => 2 MB              */
 289
 290         case (CFG_FLASH_WORD_SIZE)STM_ID_29W320DT:
 291                 info->flash_id += FLASH_STMW320DT;
 292                 info->sector_count = 67;
 293                 info->size = 0x00400000;  break;        /* => 4 MB      */
 294
 295         case (CFG_FLASH_WORD_SIZE)AMD_ID_LV320T:
 296                 info->flash_id += FLASH_AM320T;
 297                 info->sector_count = 71;
 298                 info->size = 0x00400000;  break;        /* => 4 MB      */
 299
 300         case (CFG_FLASH_WORD_SIZE)AMD_ID_LV320B:
 301                 info->flash_id += FLASH_AM320B;
 302                 info->sector_count = 71;
 303                 info->size = 0x00400000;  break;        /* => 4 MB      */
 304
 305         case (CFG_FLASH_WORD_SIZE)AMD_ID_DL322T:
 306                 info->flash_id += FLASH_AMDL322T;
 307                 info->sector_count = 71;
 308                 info->size = 0x00400000;  break;        /* => 4 MB      */
 309
 310         case (CFG_FLASH_WORD_SIZE)AMD_ID_DL322B:
 311                 info->flash_id += FLASH_AMDL322B;
 312                 info->sector_count = 71;
 313                 info->size = 0x00400000;  break;        /* => 4 MB      */
 314
 315         case (CFG_FLASH_WORD_SIZE)AMD_ID_DL323T:
 316                 info->flash_id += FLASH_AMDL323T;
 317                 info->sector_count = 71;
 318                 info->size = 0x00400000;  break;        /* => 4 MB      */
 319
 320         case (CFG_FLASH_WORD_SIZE)AMD_ID_DL323B:
 321                 info->flash_id += FLASH_AMDL323B;
 322                 info->sector_count = 71;
 323                 info->size = 0x00400000;  break;        /* => 4 MB      */
 324
 325         case (CFG_FLASH_WORD_SIZE)AMD_ID_LV640U:
 326                 info->flash_id += FLASH_AM640U;
 327                 info->sector_count = 128;
 328                 info->size = 0x00800000;  break;        /* => 8 MB      */
 329
 330         case (CFG_FLASH_WORD_SIZE)SST_ID_xF800A:
 331                 info->flash_id += FLASH_SST800A;
 332                 info->sector_count = 16;
 333                 info->size = 0x00100000;
 334                 break;                          /* => 1 MB              */
 335
 336         case (CFG_FLASH_WORD_SIZE)SST_ID_xF160A:
 337                 info->flash_id += FLASH_SST160A;
 338                 info->sector_count = 32;
 339                 info->size = 0x00200000;
 340                 break;                          /* => 2 MB              */
 341
 342         default:
 343                 info->flash_id = FLASH_UNKNOWN;
 344                 return (0);                     /* => no or unknown flash */
 345
 346         }
 347
 348         /* set up sector start address table */
 349         if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||
 350             ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM640U)) {
 351             for (i = 0; i < info->sector_count; i++)
 352                 info->start[i] = base + (i * 0x00010000);
 353         } else if (((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL322B) ||
 354                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL323B) ||
 355                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320B) ||
 356                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL324B)) {
 357                 /* set sector offsets for bottom boot block type        */
 358                 for (i=0; i<8; ++i) {           /*  8 x 8k boot sectors */
 359                         info->start[i] = base;
 360                         base += 8 << 10;
 361                 }
 362                 while (i < info->sector_count) {        /* 64k regular sectors  */
 363                         info->start[i] = base;
 364                         base += 64 << 10;
 365                         ++i;
 366                 }
 367         } else if (((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL322T) ||
 368                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL323T) ||
 369                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320T) ||
 370                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL324T)) {
 371                 /* set sector offsets for top boot block type           */
 372                 base += info->size;
 373                 i = info->sector_count;
 374                 for (n=0; n<8; ++n) {           /*  8 x 8k boot sectors */
 375                         base -= 8 << 10;
 376                         --i;
 377                         info->start[i] = base;
 378                 }
 379                 while (i > 0) {                 /* 64k regular sectors  */
 380                         base -= 64 << 10;
 381                         --i;
 382                         info->start[i] = base;
 383                 }
 384         } else if ((info->flash_id & FLASH_TYPEMASK) == FLASH_STMW320DT) {
 385                 /* set sector offsets for top boot block type           */
 386                 base += info->size;
 387                 i = info->sector_count;
 388                 /*  1 x 16k boot sector */
 389                 base -= 16 << 10;
 390                 --i;
 391                 info->start[i] = base;
 392                 /*  2 x 8k  boot sectors */
 393                 for (n=0; n<2; ++n) {
 394                         base -= 8 << 10;
 395                         --i;
 396                         info->start[i] = base;
 397                 }
 398                 /*  1 x 32k boot sector */
 399                 base -= 32 << 10;
 400                 --i;
 401                 info->start[i] = base;
 402
 403                 while (i > 0) {                 /* 64k regular sectors  */
 404                         base -= 64 << 10;
 405                         --i;
 406                         info->start[i] = base;
 407                 }
 408         } else {
 409             if (info->flash_id & FLASH_BTYPE) {
 410                 /* set sector offsets for bottom boot block type        */
 411                 info->start[0] = base + 0x00000000;
 412                 info->start[1] = base + 0x00004000;
 413                 info->start[2] = base + 0x00006000;
 414                 info->start[3] = base + 0x00008000;
 415                 for (i = 4; i < info->sector_count; i++) {
 416                         info->start[i] = base + (i * 0x00010000) - 0x00030000;
 417                 }
 418             } else {
 419                 /* set sector offsets for top boot block type           */
 420                 i = info->sector_count - 1;
 421                 info->start[i--] = base + info->size - 0x00004000;
 422                 info->start[i--] = base + info->size - 0x00006000;
 423                 info->start[i--] = base + info->size - 0x00008000;
 424                 for (; i >= 0; i--) {
 425                         info->start[i] = base + i * 0x00010000;
 426                 }
 427             }
 428         }
 429
 430         /* check for protected sectors */
 431         for (i = 0; i < info->sector_count; i++) {
 432                 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
 433                 /* D0 = 1 if protected */
 434                 addr2 = (volatile CFG_FLASH_WORD_SIZE *)(info->start[i]);
 435                 if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST)
 436                   info->protect[i] = 0;
 437                 else
 438                   info->protect[i] = addr2[CFG_FLASH_READ2] & 1;
 439         }
 440
 441         /*
 442          * Prevent writes to uninitialized FLASH.
 443          */
 444         if (info->flash_id != FLASH_UNKNOWN) {
 445                 addr2 = (CFG_FLASH_WORD_SIZE *)info->start[0];
 446                 *addr2 = (CFG_FLASH_WORD_SIZE)0x00F000F0;       /* reset bank */
 447         }
 448
 449         return (info->size);
 450 }
 451
 452
 453 /*-----------------------------------------------------------------------
 454  */
 455
 456 int     flash_erase (flash_info_t *info, int s_first, int s_last)
 457 {
 458         volatile CFG_FLASH_WORD_SIZE *addr = (CFG_FLASH_WORD_SIZE *)(info->start[0]);
 459         volatile CFG_FLASH_WORD_SIZE *addr2;
 460         int flag, prot, sect, l_sect;
 461         ulong start, now, last;
 462         int i;
 463
 464         if ((s_first < 0) || (s_first > s_last)) {
 465                 if (info->flash_id == FLASH_UNKNOWN) {
 466                         printf ("- missing\n");
 467                 } else {
 468                         printf ("- no sectors to erase\n");
 469                 }
 470                 return 1;
 471         }
 472
 473         if (info->flash_id == FLASH_UNKNOWN) {
 474                 printf ("Can't erase unknown flash type - aborted\n");
 475                 return 1;
 476         }
 477
 478         prot = 0;
 479         for (sect=s_first; sect<=s_last; ++sect) {
 480                 if (info->protect[sect]) {
 481                         prot++;
 482                 }
 483         }
 484
 485         if (prot) {
 486                 printf ("- Warning: %d protected sectors will not be erased!\n",
 487                         prot);
 488         } else {
 489                 printf ("\n");
 490         }
 491
 492         l_sect = -1;
 493
 494         /* Disable interrupts which might cause a timeout here */
 495         flag = disable_interrupts();
 496
 497         /* Start erase on unprotected sectors */
 498         for (sect = s_first; sect<=s_last; sect++) {
 499                 if (info->protect[sect] == 0) { /* not protected */
 500                     addr2 = (CFG_FLASH_WORD_SIZE *)(info->start[sect]);
 501                     if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) {
 502                         addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00AA00AA;
 503                         addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE)0x00550055;
 504                         addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00800080;
 505                         addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00AA00AA;
 506                         addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE)0x00550055;
 507                         addr2[0] = (CFG_FLASH_WORD_SIZE)0x00500050;  /* block erase */
 508                         for (i=0; i<50; i++)
 509                           udelay(1000);  /* wait 1 ms */
 510                     } else {
 511                         if (sect == s_first) {
 512                             addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00AA00AA;
 513                             addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE)0x00550055;
 514                             addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00800080;
 515                             addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00AA00AA;
 516                             addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE)0x00550055;
 517                         }
 518                         addr2[0] = (CFG_FLASH_WORD_SIZE)0x00300030;  /* sector erase */
 519                     }
 520                     l_sect = sect;
 521                 }
 522         }
 523
 524         /* re-enable interrupts if necessary */
 525         if (flag)
 526                 enable_interrupts();
 527
 528         /* wait at least 80us - let's wait 1 ms */
 529         udelay (1000);
 530
 531         /*
 532          * We wait for the last triggered sector
 533          */
 534         if (l_sect < 0)
 535                 goto DONE;
 536
 537         start = get_timer (0);
 538         last  = start;
 539         addr = (CFG_FLASH_WORD_SIZE *)(info->start[l_sect]);
 540         while ((addr[0] & (CFG_FLASH_WORD_SIZE)0x00800080) != (CFG_FLASH_WORD_SIZE)0x00800080) {
 541                 if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
 542                         printf ("Timeout\n");
 543                         return 1;
 544                 }
 545                 /* show that we're waiting */
 546                 if ((now - last) > 1000) {      /* every second */
 547                         putc ('.');
 548                         last = now;
 549                 }
 550         }
 551
 552 DONE:
 553         /* reset to read mode */
 554         addr = (CFG_FLASH_WORD_SIZE *)info->start[0];
 555         addr[0] = (CFG_FLASH_WORD_SIZE)0x00F000F0;      /* reset bank */
 556
 557         printf (" done\n");
 558         return 0;
 559 }
 560
 561 /*-----------------------------------------------------------------------
 562  * Copy memory to flash, returns:
 563  * 0 - OK
 564  * 1 - write timeout
 565  * 2 - Flash not erased
 566  */
 567
 568 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 569 {
 570         ulong cp, wp, data;
 571         int i, l, rc;
 572
 573         wp = (addr & ~3);       /* get lower word aligned address */
 574
 575         /*
 576          * handle unaligned start bytes
 577          */
 578         if ((l = addr - wp) != 0) {
 579                 data = 0;
 580                 for (i=0, cp=wp; i<l; ++i, ++cp) {
 581                         data = (data << 8) | (*(uchar *)cp);
 582                 }
 583                 for (; i<4 && cnt>0; ++i) {
 584                         data = (data << 8) | *src++;
 585                         --cnt;
 586                         ++cp;
 587                 }
 588                 for (; cnt==0 && i<4; ++i, ++cp) {
 589                         data = (data << 8) | (*(uchar *)cp);
 590                 }
 591
 592                 if ((rc = write_word(info, wp, data)) != 0) {
 593                         return (rc);
 594                 }
 595                 wp += 4;
 596         }
 597
 598         /*
 599          * handle word aligned part
 600          */
 601         while (cnt >= 4) {
 602                 data = 0;
 603                 for (i=0; i<4; ++i) {
 604                         data = (data << 8) | *src++;
 605                 }
 606                 if ((rc = write_word(info, wp, data)) != 0) {
 607                         return (rc);
 608                 }
 609                 wp  += 4;
 610                 cnt -= 4;
 611         }
 612
 613         if (cnt == 0) {
 614                 return (0);
 615         }
 616
 617         /*
 618          * handle unaligned tail bytes
 619          */
 620         data = 0;
 621         for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
 622                 data = (data << 8) | *src++;
 623                 --cnt;
 624         }
 625         for (; i<4; ++i, ++cp) {
 626                 data = (data << 8) | (*(uchar *)cp);
 627         }
 628
 629         return (write_word(info, wp, data));
 630 }
 631
 632 /*-----------------------------------------------------------------------
 633  * Write a word to Flash, returns:
 634  * 0 - OK
 635  * 1 - write timeout
 636  * 2 - Flash not erased
 637  */
 638 static int write_word (flash_info_t *info, ulong dest, ulong data)
 639 {
 640         volatile CFG_FLASH_WORD_SIZE *addr2 = (CFG_FLASH_WORD_SIZE *)(info->start[0]);
 641         volatile CFG_FLASH_WORD_SIZE *dest2 = (CFG_FLASH_WORD_SIZE *)dest;
 642         volatile CFG_FLASH_WORD_SIZE *data2 = (CFG_FLASH_WORD_SIZE *)&data;
 643         ulong start;
 644         int flag;
 645         int i;
 646
 647         /* Check if Flash is (sufficiently) erased */
 648         if ((*((volatile CFG_FLASH_WORD_SIZE *)dest) &
 649              (CFG_FLASH_WORD_SIZE)data) != (CFG_FLASH_WORD_SIZE)data) {
 650                 return (2);
 651         }
 652         /* Disable interrupts which might cause a timeout here */
 653         flag = disable_interrupts();
 654
 655         for (i=0; i<4/sizeof(CFG_FLASH_WORD_SIZE); i++)
 656           {
 657             addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00AA00AA;
 658             addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE)0x00550055;
 659             addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00A000A0;
 660
 661             dest2[i] = data2[i];
 662
 663             /* re-enable interrupts if necessary */
 664             if (flag)
 665               enable_interrupts();
 666
 667             /* data polling for D7 */
 668             start = get_timer (0);
 669             while ((dest2[i] & (CFG_FLASH_WORD_SIZE)0x00800080) !=
 670                    (data2[i] & (CFG_FLASH_WORD_SIZE)0x00800080)) {
 671               if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
 672                 return (1);
 673               }
 674             }
 675           }
 676
 677         return (0);
 678 }
 679
 680 /*-----------------------------------------------------------------------
 681  */