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 <asm/processor.h>
  26
  27 flash_info_t    flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips        */
  28
  29 /*-----------------------------------------------------------------------
  30  * Functions
  31  */
  32 static int write_word (flash_info_t *info, ulong dest, ulong data);
  33
  34 /*-----------------------------------------------------------------------
  35  */
  36 static void flash_get_offsets (ulong base, flash_info_t *info)
  37 {
  38         int i;
  39         short n;
  40
  41         /* set up sector start address table */
  42         if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||
  43             ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM640U)) {
  44             for (i = 0; i < info->sector_count; i++)
  45                 info->start[i] = base + (i * 0x00010000);
  46         } else if (((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL322B) ||
  47                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL323B) ||
  48                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320B) ||
  49                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL324B)) {
  50                 /* set sector offsets for bottom boot block type        */
  51                 for (i=0; i<8; ++i) {           /*  8 x 8k boot sectors */
  52                         info->start[i] = base;
  53                         base += 8 << 10;
  54                 }
  55                 while (i < info->sector_count) {        /* 64k regular sectors  */
  56                         info->start[i] = base;
  57                         base += 64 << 10;
  58                         ++i;
  59                 }
  60         } else if (((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL322T) ||
  61                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL323T) ||
  62                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320T) ||
  63                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL324T)) {
  64                 /* set sector offsets for top boot block type           */
  65                 base += info->size;
  66                 i = info->sector_count;
  67                 for (n=0; n<8; ++n) {           /*  8 x 8k boot sectors */
  68                         base -= 8 << 10;
  69                         --i;
  70                         info->start[i] = base;
  71                 }
  72                 while (i > 0) {                 /* 64k regular sectors  */
  73                         base -= 64 << 10;
  74                         --i;
  75                         info->start[i] = base;
  76                 }
  77         } else {
  78             if (info->flash_id & FLASH_BTYPE) {
  79                 /* set sector offsets for bottom boot block type        */
  80                 info->start[0] = base + 0x00000000;
  81                 info->start[1] = base + 0x00004000;
  82                 info->start[2] = base + 0x00006000;
  83                 info->start[3] = base + 0x00008000;
  84                 for (i = 4; i < info->sector_count; i++) {
  85                         info->start[i] = base + (i * 0x00010000) - 0x00030000;
  86                 }
  87             } else {
  88                 /* set sector offsets for top boot block type           */
  89                 i = info->sector_count - 1;
  90                 info->start[i--] = base + info->size - 0x00004000;
  91                 info->start[i--] = base + info->size - 0x00006000;
  92                 info->start[i--] = base + info->size - 0x00008000;
  93                 for (; i >= 0; i--) {
  94                         info->start[i] = base + i * 0x00010000;
  95                 }
  96             }
  97         }
  98 }
  99
 100 /*-----------------------------------------------------------------------
 101  */
 102 void flash_print_info  (flash_info_t *info)
 103 {
 104         int i;
 105         int k;
 106         int size;
 107         int erased;
 108         volatile unsigned long *flash;
 109
 110         if (info->flash_id == FLASH_UNKNOWN) {
 111                 printf ("missing or unknown FLASH type\n");
 112                 return;
 113         }
 114
 115         switch (info->flash_id & FLASH_VENDMASK) {
 116         case FLASH_MAN_AMD:     printf ("AMD ");                break;
 117         case FLASH_MAN_FUJ:     printf ("FUJITSU ");            break;
 118         case FLASH_MAN_SST:     printf ("SST ");                break;
 119         case FLASH_MAN_STM:     printf ("ST  ");                break;
 120         default:                printf ("Unknown Vendor ");     break;
 121         }
 122
 123         switch (info->flash_id & FLASH_TYPEMASK) {
 124         case FLASH_AM400B:      printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
 125                                 break;
 126         case FLASH_AM400T:      printf ("AM29LV400T (4 Mbit, top boot sector)\n");
 127                                 break;
 128         case FLASH_AM800B:      printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
 129                                 break;
 130         case FLASH_AM800T:      printf ("AM29LV800T (8 Mbit, top boot sector)\n");
 131                                 break;
 132         case FLASH_AM160B:      printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
 133                                 break;
 134         case FLASH_AM160T:      printf ("AM29LV160T (16 Mbit, top boot sector)\n");
 135                                 break;
 136         case FLASH_AM320T:      printf ("AM29LV320T (32 M, top sector)\n");
 137                                 break;
 138         case FLASH_AM320B:      printf ("AM29LV320B (32 M, bottom sector)\n");
 139                                 break;
 140         case FLASH_AMDL322T:    printf ("AM29DL322T (32 M, top sector)\n");
 141                                 break;
 142         case FLASH_AMDL322B:    printf ("AM29DL322B (32 M, bottom sector)\n");
 143                                 break;
 144         case FLASH_AMDL323T:    printf ("AM29DL323T (32 M, top sector)\n");
 145                                 break;
 146         case FLASH_AMDL323B:    printf ("AM29DL323B (32 M, bottom sector)\n");
 147                                 break;
 148         case FLASH_AM640U:      printf ("AM29LV640D (64 M, uniform sector)\n");
 149                                 break;
 150         case FLASH_SST800A:     printf ("SST39LF/VF800 (8 Mbit, uniform sector size)\n");
 151                                 break;
 152         case FLASH_SST160A:     printf ("SST39LF/VF160 (16 Mbit, uniform sector size)\n");
 153                                 break;
 154         case FLASH_STMW320DT:   printf ("M29W320DT (32 M, top sector)\n");
 155                                 break;
 156         default:                printf ("Unknown Chip Type\n");
 157                                 break;
 158         }
 159
 160         printf ("  Size: %ld MB in %d Sectors\n",
 161                 info->size >> 20, info->sector_count);
 162
 163         printf ("  Sector Start Addresses:");
 164         for (i=0; i<info->sector_count; ++i) {
 165 #ifdef CFG_FLASH_EMPTY_INFO
 166                 /*
 167                  * Check if whole sector is erased
 168                  */
 169                 if (i != (info->sector_count-1))
 170                   size = info->start[i+1] - info->start[i];
 171                 else
 172                   size = info->start[0] + info->size - info->start[i];
 173                 erased = 1;
 174                 flash = (volatile unsigned long *)info->start[i];
 175                 size = size >> 2;        /* divide by 4 for longword access */
 176                 for (k=0; k<size; k++)
 177                   {
 178                     if (*flash++ != 0xffffffff)
 179                       {
 180                         erased = 0;
 181                         break;
 182                       }
 183                   }
 184
 185                 if ((i % 5) == 0)
 186                         printf ("\n   ");
 187                 /* print empty and read-only info */
 188                 printf (" %08lX%s%s",
 189                         info->start[i],
 190                         erased ? " E" : "  ",
 191                         info->protect[i] ? "RO " : "   ");
 192 #else
 193                 if ((i % 5) == 0)
 194                         printf ("\n   ");
 195                 printf (" %08lX%s",
 196                         info->start[i],
 197                         info->protect[i] ? " (RO)" : "     ");
 198 #endif
 199
 200         }
 201         printf ("\n");
 202         return;
 203 }
 204
 205 /*-----------------------------------------------------------------------
 206  */
 207
 208
 209 /*-----------------------------------------------------------------------
 210  */
 211
 212 /*
 213  * The following code cannot be run from FLASH!
 214  */
 215 static ulong flash_get_size (vu_long *addr, flash_info_t *info)
 216 {
 217         short i;
 218         short n;
 219         CFG_FLASH_WORD_SIZE value;
 220         ulong base = (ulong)addr;
 221         volatile CFG_FLASH_WORD_SIZE *addr2 = (CFG_FLASH_WORD_SIZE *)addr;
 222
 223         /* Write auto select command: read Manufacturer ID */
 224         addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00AA00AA;
 225         addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE)0x00550055;
 226         addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00900090;
 227
 228         value = addr2[CFG_FLASH_READ0];
 229
 230         switch (value) {
 231         case (CFG_FLASH_WORD_SIZE)AMD_MANUFACT:
 232                 info->flash_id = FLASH_MAN_AMD;
 233                 break;
 234         case (CFG_FLASH_WORD_SIZE)FUJ_MANUFACT:
 235                 info->flash_id = FLASH_MAN_FUJ;
 236                 break;
 237         case (CFG_FLASH_WORD_SIZE)SST_MANUFACT:
 238                 info->flash_id = FLASH_MAN_SST;
 239                 break;
 240         case (CFG_FLASH_WORD_SIZE)STM_MANUFACT:
 241                 info->flash_id = FLASH_MAN_STM;
 242                 break;
 243         default:
 244                 info->flash_id = FLASH_UNKNOWN;
 245                 info->sector_count = 0;
 246                 info->size = 0;
 247                 return (0);                     /* no or unknown flash  */
 248         }
 249
 250         value = addr2[CFG_FLASH_READ1];         /* device ID            */
 251
 252         switch (value) {
 253         case (CFG_FLASH_WORD_SIZE)AMD_ID_LV400T:
 254                 info->flash_id += FLASH_AM400T;
 255                 info->sector_count = 11;
 256                 info->size = 0x00080000;
 257                 break;                          /* => 0.5 MB            */
 258
 259         case (CFG_FLASH_WORD_SIZE)AMD_ID_LV400B:
 260                 info->flash_id += FLASH_AM400B;
 261                 info->sector_count = 11;
 262                 info->size = 0x00080000;
 263                 break;                          /* => 0.5 MB            */
 264
 265         case (CFG_FLASH_WORD_SIZE)AMD_ID_LV800T:
 266                 info->flash_id += FLASH_AM800T;
 267                 info->sector_count = 19;
 268                 info->size = 0x00100000;
 269                 break;                          /* => 1 MB              */
 270
 271         case (CFG_FLASH_WORD_SIZE)AMD_ID_LV800B:
 272                 info->flash_id += FLASH_AM800B;
 273                 info->sector_count = 19;
 274                 info->size = 0x00100000;
 275                 break;                          /* => 1 MB              */
 276
 277         case (CFG_FLASH_WORD_SIZE)AMD_ID_LV160T:
 278                 info->flash_id += FLASH_AM160T;
 279                 info->sector_count = 35;
 280                 info->size = 0x00200000;
 281                 break;                          /* => 2 MB              */
 282
 283         case (CFG_FLASH_WORD_SIZE)AMD_ID_LV160B:
 284                 info->flash_id += FLASH_AM160B;
 285                 info->sector_count = 35;
 286                 info->size = 0x00200000;
 287                 break;                          /* => 2 MB              */
 288
 289         case (CFG_FLASH_WORD_SIZE)STM_ID_29W320DT:
 290                 info->flash_id += FLASH_STMW320DT;
 291                 info->sector_count = 67;
 292                 info->size = 0x00400000;  break;        /* => 4 MB      */
 293
 294         case (CFG_FLASH_WORD_SIZE)AMD_ID_LV320T:
 295                 info->flash_id += FLASH_AM320T;
 296                 info->sector_count = 71;
 297                 info->size = 0x00400000;  break;        /* => 4 MB      */
 298
 299         case (CFG_FLASH_WORD_SIZE)AMD_ID_LV320B:
 300                 info->flash_id += FLASH_AM320B;
 301                 info->sector_count = 71;
 302                 info->size = 0x00400000;  break;        /* => 4 MB      */
 303
 304         case (CFG_FLASH_WORD_SIZE)AMD_ID_DL322T:
 305                 info->flash_id += FLASH_AMDL322T;
 306                 info->sector_count = 71;
 307                 info->size = 0x00400000;  break;        /* => 4 MB      */
 308
 309         case (CFG_FLASH_WORD_SIZE)AMD_ID_DL322B:
 310                 info->flash_id += FLASH_AMDL322B;
 311                 info->sector_count = 71;
 312                 info->size = 0x00400000;  break;        /* => 4 MB      */
 313
 314         case (CFG_FLASH_WORD_SIZE)AMD_ID_DL323T:
 315                 info->flash_id += FLASH_AMDL323T;
 316                 info->sector_count = 71;
 317                 info->size = 0x00400000;  break;        /* => 4 MB      */
 318
 319         case (CFG_FLASH_WORD_SIZE)AMD_ID_DL323B:
 320                 info->flash_id += FLASH_AMDL323B;
 321                 info->sector_count = 71;
 322                 info->size = 0x00400000;  break;        /* => 4 MB      */
 323
 324         case (CFG_FLASH_WORD_SIZE)AMD_ID_LV640U:
 325                 info->flash_id += FLASH_AM640U;
 326                 info->sector_count = 128;
 327                 info->size = 0x00800000;  break;        /* => 8 MB      */
 328
 329         case (CFG_FLASH_WORD_SIZE)SST_ID_xF800A:
 330                 info->flash_id += FLASH_SST800A;
 331                 info->sector_count = 16;
 332                 info->size = 0x00100000;
 333                 break;                          /* => 1 MB              */
 334
 335         case (CFG_FLASH_WORD_SIZE)SST_ID_xF160A:
 336                 info->flash_id += FLASH_SST160A;
 337                 info->sector_count = 32;
 338                 info->size = 0x00200000;
 339                 break;                          /* => 2 MB              */
 340
 341         default:
 342                 info->flash_id = FLASH_UNKNOWN;
 343                 return (0);                     /* => no or unknown flash */
 344
 345         }
 346
 347         /* set up sector start address table */
 348         if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||
 349             ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM640U)) {
 350             for (i = 0; i < info->sector_count; i++)
 351                 info->start[i] = base + (i * 0x00010000);
 352         } else if (((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL322B) ||
 353                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL323B) ||
 354                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320B) ||
 355                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL324B)) {
 356                 /* set sector offsets for bottom boot block type        */
 357                 for (i=0; i<8; ++i) {           /*  8 x 8k boot sectors */
 358                         info->start[i] = base;
 359                         base += 8 << 10;
 360                 }
 361                 while (i < info->sector_count) {        /* 64k regular sectors  */
 362                         info->start[i] = base;
 363                         base += 64 << 10;
 364                         ++i;
 365                 }
 366         } else if (((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL322T) ||
 367                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL323T) ||
 368                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320T) ||
 369                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL324T)) {
 370                 /* set sector offsets for top boot block type           */
 371                 base += info->size;
 372                 i = info->sector_count;
 373                 for (n=0; n<8; ++n) {           /*  8 x 8k boot sectors */
 374                         base -= 8 << 10;
 375                         --i;
 376                         info->start[i] = base;
 377                 }
 378                 while (i > 0) {                 /* 64k regular sectors  */
 379                         base -= 64 << 10;
 380                         --i;
 381                         info->start[i] = base;
 382                 }
 383         } else if ((info->flash_id & FLASH_TYPEMASK) == FLASH_STMW320DT) {
 384                 /* set sector offsets for top boot block type           */
 385                 base += info->size;
 386                 i = info->sector_count;
 387                 /*  1 x 16k boot sector */
 388                 base -= 16 << 10;
 389                 --i;
 390                 info->start[i] = base;
 391                 /*  2 x 8k  boot sectors */
 392                 for (n=0; n<2; ++n) {
 393                         base -= 8 << 10;
 394                         --i;
 395                         info->start[i] = base;
 396                 }
 397                 /*  1 x 32k boot sector */
 398                 base -= 32 << 10;
 399                 --i;
 400                 info->start[i] = base;
 401
 402                 while (i > 0) {                 /* 64k regular sectors  */
 403                         base -= 64 << 10;
 404                         --i;
 405                         info->start[i] = base;
 406                 }
 407         } else {
 408             if (info->flash_id & FLASH_BTYPE) {
 409                 /* set sector offsets for bottom boot block type        */
 410                 info->start[0] = base + 0x00000000;
 411                 info->start[1] = base + 0x00004000;
 412                 info->start[2] = base + 0x00006000;
 413                 info->start[3] = base + 0x00008000;
 414                 for (i = 4; i < info->sector_count; i++) {
 415                         info->start[i] = base + (i * 0x00010000) - 0x00030000;
 416                 }
 417             } else {
 418                 /* set sector offsets for top boot block type           */
 419                 i = info->sector_count - 1;
 420                 info->start[i--] = base + info->size - 0x00004000;
 421                 info->start[i--] = base + info->size - 0x00006000;
 422                 info->start[i--] = base + info->size - 0x00008000;
 423                 for (; i >= 0; i--) {
 424                         info->start[i] = base + i * 0x00010000;
 425                 }
 426             }
 427         }
 428
 429         /* check for protected sectors */
 430         for (i = 0; i < info->sector_count; i++) {
 431                 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
 432                 /* D0 = 1 if protected */
 433                 addr2 = (volatile CFG_FLASH_WORD_SIZE *)(info->start[i]);
 434                 if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST)
 435                   info->protect[i] = 0;
 436                 else
 437                   info->protect[i] = addr2[CFG_FLASH_READ2] & 1;
 438         }
 439
 440         /*
 441          * Prevent writes to uninitialized FLASH.
 442          */
 443         if (info->flash_id != FLASH_UNKNOWN) {
 444                 addr2 = (CFG_FLASH_WORD_SIZE *)info->start[0];
 445                 *addr2 = (CFG_FLASH_WORD_SIZE)0x00F000F0;       /* reset bank */
 446         }
 447
 448         return (info->size);
 449 }
 450
 451
 452 /*-----------------------------------------------------------------------
 453  */
 454
 455 int     flash_erase (flash_info_t *info, int s_first, int s_last)
 456 {
 457         volatile CFG_FLASH_WORD_SIZE *addr = (CFG_FLASH_WORD_SIZE *)(info->start[0]);
 458         volatile CFG_FLASH_WORD_SIZE *addr2;
 459         int flag, prot, sect, l_sect;
 460         ulong start, now, last;
 461         int i;
 462
 463         if ((s_first < 0) || (s_first > s_last)) {
 464                 if (info->flash_id == FLASH_UNKNOWN) {
 465                         printf ("- missing\n");
 466                 } else {
 467                         printf ("- no sectors to erase\n");
 468                 }
 469                 return 1;
 470         }
 471
 472         if (info->flash_id == FLASH_UNKNOWN) {
 473                 printf ("Can't erase unknown flash type - aborted\n");
 474                 return 1;
 475         }
 476
 477         prot = 0;
 478         for (sect=s_first; sect<=s_last; ++sect) {
 479                 if (info->protect[sect]) {
 480                         prot++;
 481                 }
 482         }
 483
 484         if (prot) {
 485                 printf ("- Warning: %d protected sectors will not be erased!\n",
 486                         prot);
 487         } else {
 488                 printf ("\n");
 489         }
 490
 491         l_sect = -1;
 492
 493         /* Disable interrupts which might cause a timeout here */
 494         flag = disable_interrupts();
 495
 496         /* Start erase on unprotected sectors */
 497         for (sect = s_first; sect<=s_last; sect++) {
 498                 if (info->protect[sect] == 0) { /* not protected */
 499                     addr2 = (CFG_FLASH_WORD_SIZE *)(info->start[sect]);
 500                     if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) {
 501                         addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00AA00AA;
 502                         addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE)0x00550055;
 503                         addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00800080;
 504                         addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00AA00AA;
 505                         addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE)0x00550055;
 506                         addr2[0] = (CFG_FLASH_WORD_SIZE)0x00500050;  /* block erase */
 507                         for (i=0; i<50; i++)
 508                           udelay(1000);  /* wait 1 ms */
 509                     } else {
 510                         if (sect == s_first) {
 511                             addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00AA00AA;
 512                             addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE)0x00550055;
 513                             addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00800080;
 514                             addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00AA00AA;
 515                             addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE)0x00550055;
 516                         }
 517                         addr2[0] = (CFG_FLASH_WORD_SIZE)0x00300030;  /* sector erase */
 518                     }
 519                     l_sect = sect;
 520                 }
 521         }
 522
 523         /* re-enable interrupts if necessary */
 524         if (flag)
 525                 enable_interrupts();
 526
 527         /* wait at least 80us - let's wait 1 ms */
 528         udelay (1000);
 529
 530         /*
 531          * We wait for the last triggered sector
 532          */
 533         if (l_sect < 0)
 534                 goto DONE;
 535
 536         start = get_timer (0);
 537         last  = start;
 538         addr = (CFG_FLASH_WORD_SIZE *)(info->start[l_sect]);
 539         while ((addr[0] & (CFG_FLASH_WORD_SIZE)0x00800080) != (CFG_FLASH_WORD_SIZE)0x00800080) {
 540                 if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
 541                         printf ("Timeout\n");
 542                         return 1;
 543                 }
 544                 /* show that we're waiting */
 545                 if ((now - last) > 1000) {      /* every second */
 546                         putc ('.');
 547                         last = now;
 548                 }
 549         }
 550
 551 DONE:
 552         /* reset to read mode */
 553         addr = (CFG_FLASH_WORD_SIZE *)info->start[0];
 554         addr[0] = (CFG_FLASH_WORD_SIZE)0x00F000F0;      /* reset bank */
 555
 556         printf (" done\n");
 557         return 0;
 558 }
 559
 560 /*-----------------------------------------------------------------------
 561  * Copy memory to flash, returns:
 562  * 0 - OK
 563  * 1 - write timeout
 564  * 2 - Flash not erased
 565  */
 566
 567 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 568 {
 569         ulong cp, wp, data;
 570         int i, l, rc;
 571
 572         wp = (addr & ~3);       /* get lower word aligned address */
 573
 574         /*
 575          * handle unaligned start bytes
 576          */
 577         if ((l = addr - wp) != 0) {
 578                 data = 0;
 579                 for (i=0, cp=wp; i<l; ++i, ++cp) {
 580 #ifdef CONFIG_B2
 581                         data = data | ((*(uchar *)cp)<<(8*i));
 582 #else
 583                         data = (data << 8) | (*(uchar *)cp);
 584 #endif
 585                 }
 586                 for (; i<4 && cnt>0; ++i) {
 587 #ifdef CONFIG_B2
 588                         data = data  | ((*src++)<<(8*i));
 589 #else
 590                         data = (data << 8) | *src++;
 591 #endif
 592                         --cnt;
 593                         ++cp;
 594                 }
 595                 for (; cnt==0 && i<4; ++i, ++cp) {
 596 #ifdef CONFIG_B2
 597                         data = data | ((*(uchar *)cp)<<(8*i));
 598 #else
 599                         data = (data << 8) | (*(uchar *)cp);
 600 #endif
 601                 }
 602
 603                 if ((rc = write_word(info, wp, data)) != 0) {
 604                         return (rc);
 605                 }
 606                 wp += 4;
 607         }
 608
 609         /*
 610          * handle word aligned part
 611          */
 612         while (cnt >= 4) {
 613                 data = 0;
 614 #ifdef CONFIG_B2
 615                 data = (*(ulong*)src);
 616                 src += 4;
 617 #else
 618                 for (i=0; i<4; ++i) {
 619                         data = (data << 8) | *src++;
 620                 }
 621 #endif
 622                 if ((rc = write_word(info, wp, data)) != 0) {
 623                         return (rc);
 624                 }
 625                 wp  += 4;
 626                 cnt -= 4;
 627         }
 628
 629         if (cnt == 0) {
 630                 return (0);
 631         }
 632
 633         /*
 634          * handle unaligned tail bytes
 635          */
 636         data = 0;
 637         for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
 638 #ifdef CONFIG_B2
 639                 data = data  | ((*src++)<<(8*i));
 640 #else
 641                 data = (data << 8) | *src++;
 642 #endif
 643                 --cnt;
 644         }
 645         for (; i<4; ++i, ++cp) {
 646 #ifdef CONFIG_B2
 647                 data = data | ((*(uchar *)cp)<<(8*i));
 648 #else
 649                 data = (data << 8) | (*(uchar *)cp);
 650 #endif
 651         }
 652
 653         return (write_word(info, wp, data));
 654 }
 655
 656 /*-----------------------------------------------------------------------
 657  * Write a word to Flash, returns:
 658  * 0 - OK
 659  * 1 - write timeout
 660  * 2 - Flash not erased
 661  */
 662 static int write_word (flash_info_t *info, ulong dest, ulong data)
 663 {
 664         volatile CFG_FLASH_WORD_SIZE *addr2 = (CFG_FLASH_WORD_SIZE *)(info->start[0]);
 665         volatile CFG_FLASH_WORD_SIZE *dest2 = (CFG_FLASH_WORD_SIZE *)dest;
 666         volatile CFG_FLASH_WORD_SIZE *data2 = (CFG_FLASH_WORD_SIZE *)&data;
 667         ulong start;
 668         int flag;
 669         int i;
 670
 671         /* Check if Flash is (sufficiently) erased */
 672         if ((*((volatile CFG_FLASH_WORD_SIZE *)dest) &
 673              (CFG_FLASH_WORD_SIZE)data) != (CFG_FLASH_WORD_SIZE)data) {
 674                 return (2);
 675         }
 676         /* Disable interrupts which might cause a timeout here */
 677         flag = disable_interrupts();
 678
 679         for (i=0; i<4/sizeof(CFG_FLASH_WORD_SIZE); i++)
 680           {
 681             addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00AA00AA;
 682             addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE)0x00550055;
 683             addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00A000A0;
 684
 685             dest2[i] = data2[i];
 686
 687             /* re-enable interrupts if necessary */
 688             if (flag)
 689               enable_interrupts();
 690
 691             /* data polling for D7 */
 692             start = get_timer (0);
 693             while ((dest2[i] & (CFG_FLASH_WORD_SIZE)0x00800080) !=
 694                    (data2[i] & (CFG_FLASH_WORD_SIZE)0x00800080)) {
 695               if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
 696                 return (1);
 697               }
 698             }
 699           }
 700
 701         return (0);
 702 }
 703
 704 /*-----------------------------------------------------------------------
 705  */