board/prodrive/common/flash.c

   1 /*
   2  * (C) Copyright 2006
   3  * Stefan Roese, DENX Software Engineering, sr@denx.de.
   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[CONFIG_SYS_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 void flash_print_info(flash_info_t *info)
  35 {
  36         int i;
  37         int k;
  38         int size;
  39         int erased;
  40         volatile unsigned long *flash;
  41
  42         if (info->flash_id == FLASH_UNKNOWN) {
  43                 printf ("missing or unknown FLASH type\n");
  44                 return;
  45         }
  46
  47         switch (info->flash_id & FLASH_VENDMASK) {
  48         case FLASH_MAN_AMD:     printf ("AMD ");                break;
  49         case FLASH_MAN_FUJ:     printf ("FUJITSU ");            break;
  50         case FLASH_MAN_SST:     printf ("SST ");                break;
  51         case FLASH_MAN_STM:     printf ("ST ");                 break;
  52         case FLASH_MAN_EXCEL:   printf ("Excel Semiconductor "); break;
  53         default:                printf ("Unknown Vendor ");     break;
  54         }
  55
  56         switch (info->flash_id & FLASH_TYPEMASK) {
  57         case FLASH_AM400B:      printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
  58                 break;
  59         case FLASH_AM400T:      printf ("AM29LV400T (4 Mbit, top boot sector)\n");
  60                 break;
  61         case FLASH_AM800B:      printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
  62                 break;
  63         case FLASH_AM800T:      printf ("AM29LV800T (8 Mbit, top boot sector)\n");
  64                 break;
  65         case FLASH_AM160B:      printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
  66                 break;
  67         case FLASH_AM160T:      printf ("AM29LV160T (16 Mbit, top boot sector)\n");
  68                 break;
  69         case FLASH_AM320T:      printf ("AM29LV320T (32 M, top sector)\n");
  70                 break;
  71         case FLASH_AM320B:      printf ("AM29LV320B (32 M, bottom sector)\n");
  72                 break;
  73         case FLASH_AMDL322T:    printf ("AM29DL322T (32 M, top sector)\n");
  74                 break;
  75         case FLASH_AMDL322B:    printf ("AM29DL322B (32 M, bottom sector)\n");
  76                 break;
  77         case FLASH_AMDL323T:    printf ("AM29DL323T (32 M, top sector)\n");
  78                 break;
  79         case FLASH_AMDL323B:    printf ("AM29DL323B (32 M, bottom sector)\n");
  80                 break;
  81         case FLASH_SST020:      printf ("SST39LF/VF020 (2 Mbit, uniform sector size)\n");
  82                 break;
  83         case FLASH_SST040:      printf ("SST39LF/VF040 (4 Mbit, uniform sector size)\n");
  84                 break;
  85         default:                printf ("Unknown Chip Type\n");
  86                 break;
  87         }
  88
  89         printf ("  Size: %ld MB in %d Sectors\n",
  90                 info->size >> 20, info->sector_count);
  91
  92         printf ("  Sector Start Addresses:");
  93         for (i=0; i<info->sector_count; ++i) {
  94 #ifdef CONFIG_SYS_FLASH_EMPTY_INFO
  95                 /*
  96                  * Check if whole sector is erased
  97                  */
  98                 if (i != (info->sector_count-1))
  99                         size = info->start[i+1] - info->start[i];
 100                 else
 101                         size = info->start[0] + info->size - info->start[i];
 102                 erased = 1;
 103                 flash = (volatile unsigned long *)info->start[i];
 104                 size = size >> 2;        /* divide by 4 for longword access */
 105                 for (k=0; k<size; k++) {
 106                         if (*flash++ != 0xffffffff) {
 107                                 erased = 0;
 108                                 break;
 109                         }
 110                 }
 111
 112                 if ((i % 5) == 0)
 113                         printf ("\n   ");
 114                 /* print empty and read-only info */
 115                 printf (" %08lX%s%s",
 116                         info->start[i],
 117                         erased ? " E" : "  ",
 118                         info->protect[i] ? "RO " : "   ");
 119 #else
 120                 if ((i % 5) == 0)
 121                         printf ("\n   ");
 122                 printf (" %08lX%s",
 123                         info->start[i],
 124                         info->protect[i] ? " (RO)" : "     ");
 125 #endif
 126
 127         }
 128         printf ("\n");
 129         return;
 130 }
 131
 132 /*
 133  * The following code cannot be run from FLASH!
 134  */
 135 static ulong flash_get_size(vu_long *addr, flash_info_t *info)
 136 {
 137         short i;
 138         short n;
 139         CONFIG_SYS_FLASH_WORD_SIZE value;
 140         ulong base = (ulong)addr;
 141         volatile CONFIG_SYS_FLASH_WORD_SIZE *addr2 = (CONFIG_SYS_FLASH_WORD_SIZE *)addr;
 142
 143         /* Write auto select command: read Manufacturer ID */
 144         addr2[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00AA00AA;
 145         addr2[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00550055;
 146         addr2[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00900090;
 147
 148         value = addr2[CONFIG_SYS_FLASH_READ0];
 149
 150         switch (value) {
 151         case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_MANUFACT:
 152                 info->flash_id = FLASH_MAN_AMD;
 153                 break;
 154         case (CONFIG_SYS_FLASH_WORD_SIZE)FUJ_MANUFACT:
 155                 info->flash_id = FLASH_MAN_FUJ;
 156                 break;
 157         case (CONFIG_SYS_FLASH_WORD_SIZE)SST_MANUFACT:
 158                 info->flash_id = FLASH_MAN_SST;
 159                 break;
 160         case (CONFIG_SYS_FLASH_WORD_SIZE)STM_MANUFACT:
 161                 info->flash_id = FLASH_MAN_STM;
 162                 break;
 163         case (CONFIG_SYS_FLASH_WORD_SIZE)EXCEL_MANUFACT:
 164                 info->flash_id = FLASH_MAN_EXCEL;
 165                 break;
 166         default:
 167                 info->flash_id = FLASH_UNKNOWN;
 168                 info->sector_count = 0;
 169                 info->size = 0;
 170                 return (0);                     /* no or unknown flash  */
 171         }
 172
 173         value = addr2[CONFIG_SYS_FLASH_READ1];          /* device ID            */
 174
 175         switch (value) {
 176         case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV400T:
 177                 info->flash_id += FLASH_AM400T;
 178                 info->sector_count = 11;
 179                 info->size = 0x00080000;
 180                 break;                          /* => 0.5 MB            */
 181
 182         case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV400B:
 183                 info->flash_id += FLASH_AM400B;
 184                 info->sector_count = 11;
 185                 info->size = 0x00080000;
 186                 break;                          /* => 0.5 MB            */
 187
 188         case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV800T:
 189                 info->flash_id += FLASH_AM800T;
 190                 info->sector_count = 19;
 191                 info->size = 0x00100000;
 192                 break;                          /* => 1 MB              */
 193
 194         case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV800B:
 195                 info->flash_id += FLASH_AM800B;
 196                 info->sector_count = 19;
 197                 info->size = 0x00100000;
 198                 break;                          /* => 1 MB              */
 199
 200         case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV160T:
 201                 info->flash_id += FLASH_AM160T;
 202                 info->sector_count = 35;
 203                 info->size = 0x00200000;
 204                 break;                          /* => 2 MB              */
 205
 206         case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV160B:
 207                 info->flash_id += FLASH_AM160B;
 208                 info->sector_count = 35;
 209                 info->size = 0x00200000;
 210                 break;                          /* => 2 MB              */
 211
 212         case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV320T:
 213                 info->flash_id += FLASH_AM320T;
 214                 info->sector_count = 71;
 215                 info->size = 0x00400000;  break;        /* => 4 MB      */
 216
 217         case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV320B:
 218                 info->flash_id += FLASH_AM320B;
 219                 info->sector_count = 71;
 220                 info->size = 0x00400000;  break;        /* => 4 MB      */
 221
 222         case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_DL322T:
 223                 info->flash_id += FLASH_AMDL322T;
 224                 info->sector_count = 71;
 225                 info->size = 0x00400000;  break;        /* => 4 MB      */
 226
 227         case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_DL322B:
 228                 info->flash_id += FLASH_AMDL322B;
 229                 info->sector_count = 71;
 230                 info->size = 0x00400000;  break;        /* => 4 MB      */
 231
 232         case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_DL323T:
 233                 info->flash_id += FLASH_AMDL323T;
 234                 info->sector_count = 71;
 235                 info->size = 0x00400000;  break;        /* => 4 MB      */
 236
 237         case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_DL323B:
 238                 info->flash_id += FLASH_AMDL323B;
 239                 info->sector_count = 71;
 240                 info->size = 0x00400000;  break;        /* => 4 MB      */
 241
 242         case (CONFIG_SYS_FLASH_WORD_SIZE)SST_ID_xF020:
 243                 info->flash_id += FLASH_SST020;
 244                 info->sector_count = 64;
 245                 info->size = 0x00040000;
 246                 break;                          /* => 256 kB            */
 247
 248         case (CONFIG_SYS_FLASH_WORD_SIZE)SST_ID_xF040:
 249                 info->flash_id += FLASH_SST040;
 250                 info->sector_count = 128;
 251                 info->size = 0x00080000;
 252                 break;                          /* => 512 kB            */
 253
 254         default:
 255                 info->flash_id = FLASH_UNKNOWN;
 256                 return (0);                     /* => no or unknown flash */
 257
 258         }
 259
 260         /* set up sector start address table */
 261         if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) {
 262                 for (i = 0; i < info->sector_count; i++)
 263                         info->start[i] = base + (i * 0x00001000);
 264         } else if (((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL322B) ||
 265                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL323B) ||
 266                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320B) ||
 267                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL324B)) {
 268                 /* set sector offsets for bottom boot block type        */
 269                 for (i=0; i<8; ++i) {           /*  8 x 8k boot sectors */
 270                         info->start[i] = base;
 271                         base += 8 << 10;
 272                 }
 273                 while (i < info->sector_count) {        /* 64k regular sectors  */
 274                         info->start[i] = base;
 275                         base += 64 << 10;
 276                         ++i;
 277                 }
 278         } else if (((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL322T) ||
 279                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL323T) ||
 280                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320T) ||
 281                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL324T)) {
 282                 /* set sector offsets for top boot block type           */
 283                 base += info->size;
 284                 i = info->sector_count;
 285                 for (n=0; n<8; ++n) {           /*  8 x 8k boot sectors */
 286                         base -= 8 << 10;
 287                         --i;
 288                         info->start[i] = base;
 289                 }
 290                 while (i > 0) {                 /* 64k regular sectors  */
 291                         base -= 64 << 10;
 292                         --i;
 293                         info->start[i] = base;
 294                 }
 295         } else {
 296                 if (info->flash_id & FLASH_BTYPE) {
 297                         /* set sector offsets for bottom boot block type        */
 298                         info->start[0] = base + 0x00000000;
 299                         info->start[1] = base + 0x00004000;
 300                         info->start[2] = base + 0x00006000;
 301                         info->start[3] = base + 0x00008000;
 302                         for (i = 4; i < info->sector_count; i++) {
 303                                 info->start[i] = base + (i * 0x00010000) - 0x00030000;
 304                         }
 305                 } else {
 306                         /* set sector offsets for top boot block type           */
 307                         i = info->sector_count - 1;
 308                         info->start[i--] = base + info->size - 0x00004000;
 309                         info->start[i--] = base + info->size - 0x00006000;
 310                         info->start[i--] = base + info->size - 0x00008000;
 311                         for (; i >= 0; i--) {
 312                                 info->start[i] = base + i * 0x00010000;
 313                         }
 314                 }
 315         }
 316
 317         /* check for protected sectors */
 318         for (i = 0; i < info->sector_count; i++) {
 319                 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
 320                 /* D0 = 1 if protected */
 321                 addr2 = (volatile CONFIG_SYS_FLASH_WORD_SIZE *)(info->start[i]);
 322                 if ((info->flash_id & FLASH_VENDMASK) != FLASH_MAN_AMD)
 323                         info->protect[i] = 0;
 324                 else
 325                         info->protect[i] = addr2[CONFIG_SYS_FLASH_READ2] & 1;
 326         }
 327
 328         /*
 329          * Prevent writes to uninitialized FLASH.
 330          */
 331         if (info->flash_id != FLASH_UNKNOWN) {
 332                 addr2 = (CONFIG_SYS_FLASH_WORD_SIZE *)info->start[0];
 333                 *addr2 = (CONFIG_SYS_FLASH_WORD_SIZE)0x00F000F0;        /* reset bank */
 334         }
 335
 336         return (info->size);
 337 }
 338
 339
 340 int flash_erase(flash_info_t *info, int s_first, int s_last)
 341 {
 342         volatile CONFIG_SYS_FLASH_WORD_SIZE *addr = (CONFIG_SYS_FLASH_WORD_SIZE *)(info->start[0]);
 343         volatile CONFIG_SYS_FLASH_WORD_SIZE *addr2;
 344         int flag, prot, sect, l_sect;
 345         ulong start, now, last;
 346
 347         if ((s_first < 0) || (s_first > s_last)) {
 348                 if (info->flash_id == FLASH_UNKNOWN)
 349                         printf ("- missing\n");
 350                 else
 351                         printf ("- no sectors to erase\n");
 352                 return 1;
 353         }
 354
 355         if (info->flash_id == FLASH_UNKNOWN) {
 356                 printf ("Can't erase unknown flash type - aborted\n");
 357                 return 1;
 358         }
 359
 360         prot = 0;
 361         for (sect=s_first; sect<=s_last; ++sect)
 362                 if (info->protect[sect])
 363                         prot++;
 364
 365         if (prot)
 366                 printf ("- Warning: %d protected sectors will not be erased!\n", prot);
 367         else
 368                 printf ("\n");
 369
 370         l_sect = -1;
 371
 372         /* Disable interrupts which might cause a timeout here */
 373         flag = disable_interrupts();
 374
 375         /* Start erase on unprotected sectors */
 376         for (sect = s_first; sect<=s_last; sect++) {
 377                 if (info->protect[sect] == 0) { /* not protected */
 378                         addr2 = (CONFIG_SYS_FLASH_WORD_SIZE *)(info->start[sect]);
 379                         if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) {
 380                                 addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00AA00AA;
 381                                 addr[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00550055;
 382                                 addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00800080;
 383                                 addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00AA00AA;
 384                                 addr[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00550055;
 385                                 addr2[0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00300030;  /* sector erase */
 386
 387                                 /* re-enable interrupts if necessary */
 388                                 if (flag) {
 389                                         enable_interrupts();
 390                                         flag = 0;
 391                                 }
 392
 393                                 /* data polling for D7 */
 394                                 start = get_timer (0);
 395                                 while ((addr2[0] & (CONFIG_SYS_FLASH_WORD_SIZE)0x00800080) !=
 396                                        (CONFIG_SYS_FLASH_WORD_SIZE)0x00800080) {
 397                                         if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT)
 398                                                 return (1);
 399                                 }
 400                         } else {
 401                                 if (sect == s_first) {
 402                                         addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00AA00AA;
 403                                         addr[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00550055;
 404                                         addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00800080;
 405                                         addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00AA00AA;
 406                                         addr[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00550055;
 407                                 }
 408                                 addr2[0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00300030;  /* sector erase */
 409                         }
 410                         l_sect = sect;
 411                 }
 412         }
 413
 414         /* re-enable interrupts if necessary */
 415         if (flag)
 416                 enable_interrupts();
 417
 418         /* wait at least 80us - let's wait 1 ms */
 419         udelay (1000);
 420
 421         /*
 422          * We wait for the last triggered sector
 423          */
 424         if (l_sect < 0)
 425                 goto DONE;
 426
 427         start = get_timer (0);
 428         last  = start;
 429         addr = (CONFIG_SYS_FLASH_WORD_SIZE *)(info->start[l_sect]);
 430         while ((addr[0] & (CONFIG_SYS_FLASH_WORD_SIZE)0x00800080) != (CONFIG_SYS_FLASH_WORD_SIZE)0x00800080) {
 431                 if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 432                         printf ("Timeout\n");
 433                         return 1;
 434                 }
 435                 /* show that we're waiting */
 436                 if ((now - last) > 1000) {      /* every second */
 437                         putc ('.');
 438                         last = now;
 439                 }
 440         }
 441
 442 DONE:
 443         /* reset to read mode */
 444         addr = (CONFIG_SYS_FLASH_WORD_SIZE *)info->start[0];
 445         addr[0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00F000F0;       /* reset bank */
 446
 447         printf (" done\n");
 448         return 0;
 449 }
 450
 451 /*
 452  * Copy memory to flash, returns:
 453  * 0 - OK
 454  * 1 - write timeout
 455  * 2 - Flash not erased
 456  */
 457 int write_buff(flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 458 {
 459         ulong cp, wp, data;
 460         int i, l, rc;
 461
 462         wp = (addr & ~3);       /* get lower word aligned address */
 463
 464         /*
 465          * handle unaligned start bytes
 466          */
 467         if ((l = addr - wp) != 0) {
 468                 data = 0;
 469                 for (i=0, cp=wp; i<l; ++i, ++cp) {
 470                         data = (data << 8) | (*(uchar *)cp);
 471                 }
 472                 for (; i<4 && cnt>0; ++i) {
 473                         data = (data << 8) | *src++;
 474                         --cnt;
 475                         ++cp;
 476                 }
 477                 for (; cnt==0 && i<4; ++i, ++cp) {
 478                         data = (data << 8) | (*(uchar *)cp);
 479                 }
 480
 481                 if ((rc = write_word(info, wp, data)) != 0) {
 482                         return (rc);
 483                 }
 484                 wp += 4;
 485         }
 486
 487         /*
 488          * handle word aligned part
 489          */
 490         while (cnt >= 4) {
 491                 data = 0;
 492                 for (i=0; i<4; ++i)
 493                         data = (data << 8) | *src++;
 494                 if ((rc = write_word(info, wp, data)) != 0)
 495                         return (rc);
 496                 wp  += 4;
 497                 cnt -= 4;
 498         }
 499
 500         if (cnt == 0)
 501                 return (0);
 502
 503         /*
 504          * handle unaligned tail bytes
 505          */
 506         data = 0;
 507         for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
 508                 data = (data << 8) | *src++;
 509                 --cnt;
 510         }
 511         for (; i<4; ++i, ++cp)
 512                 data = (data << 8) | (*(uchar *)cp);
 513
 514         return (write_word(info, wp, data));
 515 }
 516
 517 /*
 518  * Write a word to Flash, returns:
 519  * 0 - OK
 520  * 1 - write timeout
 521  * 2 - Flash not erased
 522  */
 523 static int write_word(flash_info_t *info, ulong dest, ulong data)
 524 {
 525         volatile CONFIG_SYS_FLASH_WORD_SIZE *addr2 = (CONFIG_SYS_FLASH_WORD_SIZE *)(info->start[0]);
 526         volatile CONFIG_SYS_FLASH_WORD_SIZE *dest2 = (CONFIG_SYS_FLASH_WORD_SIZE *)dest;
 527         volatile CONFIG_SYS_FLASH_WORD_SIZE *data2 = (CONFIG_SYS_FLASH_WORD_SIZE *)&data;
 528         ulong start;
 529         int flag;
 530         int i;
 531
 532         /* Check if Flash is (sufficiently) erased */
 533         if ((*((vu_long *)dest) & data) != data)
 534                 return (2);
 535
 536         /* Disable interrupts which might cause a timeout here */
 537         flag = disable_interrupts();
 538
 539         for (i=0; i<4/sizeof(CONFIG_SYS_FLASH_WORD_SIZE); i++) {
 540                 addr2[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00AA00AA;
 541                 addr2[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00550055;
 542                 addr2[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00A000A0;
 543
 544                 dest2[i] = data2[i];
 545
 546                 /* re-enable interrupts if necessary */
 547                 if (flag)
 548                         enable_interrupts();
 549
 550                 /* data polling for D7 */
 551                 start = get_timer (0);
 552                 while ((dest2[i] & (CONFIG_SYS_FLASH_WORD_SIZE)0x00800080) !=
 553                        (data2[i] & (CONFIG_SYS_FLASH_WORD_SIZE)0x00800080)) {
 554                         if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT)
 555                                 return (1);
 556                 }
 557         }
 558
 559         return (0);
 560 }