board/westel/amx860/flash.c

   1 /*
   2  * (C) Copyright 2001
   3  * Wolfgang Denk, DENX Software Engineering, wd@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 <mpc8xx.h>
  26
  27 flash_info_t    flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
  28
  29 #if defined(CONFIG_ENV_IS_IN_FLASH)
  30 # ifndef  CONFIG_ENV_ADDR
  31 #  define CONFIG_ENV_ADDR       (CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET)
  32 # endif
  33 # ifndef  CONFIG_ENV_SIZE
  34 #  define CONFIG_ENV_SIZE       CONFIG_ENV_SECT_SIZE
  35 # endif
  36 # ifndef  CONFIG_ENV_SECT_SIZE
  37 #  define CONFIG_ENV_SECT_SIZE  CONFIG_ENV_SIZE
  38 # endif
  39 #endif
  40
  41 /*---------------------------------------------------------------------*/
  42 #undef DEBUG_FLASH
  43
  44 #ifdef DEBUG_FLASH
  45 #define DEBUGF(fmt,args...) printf(fmt ,##args)
  46 #else
  47 #define DEBUGF(fmt,args...)
  48 #endif
  49 /*---------------------------------------------------------------------*/
  50
  51 /*-----------------------------------------------------------------------
  52  * Functions
  53  */
  54 static ulong flash_get_size (vu_long *addr, flash_info_t *info);
  55 static int write_word (flash_info_t *info, ulong dest, ulong data);
  56 static void flash_get_offsets (ulong base, flash_info_t *info);
  57
  58 /*-----------------------------------------------------------------------
  59  */
  60
  61 unsigned long flash_init (void)
  62 {
  63         volatile immap_t     *immap  = (immap_t *)CONFIG_SYS_IMMR;
  64         volatile memctl8xx_t *memctl = &immap->im_memctl;
  65         unsigned long size_b0, size_b1;
  66         int i;
  67
  68         /* Init: no FLASHes known */
  69         for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
  70                 flash_info[i].flash_id = FLASH_UNKNOWN;
  71         }
  72
  73         /* Static FLASH Bank configuration here - FIXME XXX */
  74
  75         DEBUGF("\n## Get flash bank 1 size @ 0x%08x\n",FLASH_BASE0_PRELIM);
  76
  77         size_b0 = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]);
  78
  79         if (flash_info[0].flash_id == FLASH_UNKNOWN) {
  80                 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
  81                         size_b0, size_b0<<20);
  82         }
  83
  84 #if defined(FLASH_BASE1_PRELIM) && (FLASH_BASE1_PRELIM != 0)
  85         DEBUGF("## Get flash bank 2 size @ 0x%08x\n",FLASH_BASE1_PRELIM);
  86
  87         size_b1 = flash_get_size((vu_long *)FLASH_BASE1_PRELIM, &flash_info[1]);
  88
  89         if (size_b1 > size_b0) {
  90                 printf ("## ERROR: "
  91                         "Bank 1 (0x%08lx = %ld MB) > Bank 0 (0x%08lx = %ld MB)\n",
  92                         size_b1, size_b1<<20,
  93                         size_b0, size_b0<<20
  94                 );
  95                 flash_info[0].flash_id  = FLASH_UNKNOWN;
  96                 flash_info[1].flash_id  = FLASH_UNKNOWN;
  97                 flash_info[0].sector_count      = -1;
  98                 flash_info[1].sector_count      = -1;
  99                 flash_info[0].size              = 0;
 100                 flash_info[1].size              = 0;
 101                 return (0);
 102         }
 103 #else
 104         size_b1 = 0;
 105 #endif  /* FLASH_BASE1_PRELIM */
 106
 107         DEBUGF("## Prelim. Flash bank sizes: %08lx + 0x%08lx\n",size_b0,size_b1);
 108
 109         DEBUGF ("## Before remap: "
 110                 "BR0: 0x%08x    OR0: 0x%08x    "
 111                 "BR1: 0x%08x    OR1: 0x%08x\n",
 112                 memctl->memc_br0, memctl->memc_or0,
 113                 memctl->memc_br1, memctl->memc_or1);
 114
 115         /* Remap FLASH according to real size */
 116         memctl->memc_or0 = CONFIG_SYS_OR_TIMING_FLASH | (-size_b0 & OR_AM_MSK);
 117         memctl->memc_br0 = (CONFIG_SYS_FLASH_BASE & BR_BA_MSK) | BR_MS_GPCM | BR_V;
 118
 119         DEBUGF("## BR0: 0x%08x    OR0: 0x%08x\n",
 120                 memctl->memc_br0, memctl->memc_or0);
 121
 122         /* Re-do sizing to get full correct info */
 123         size_b0 = flash_get_size((vu_long *)CONFIG_SYS_FLASH_BASE, &flash_info[0]);
 124
 125         flash_get_offsets (CONFIG_SYS_FLASH_BASE, &flash_info[0]);
 126
 127         flash_info[0].size = size_b0;
 128
 129 #if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
 130         /* monitor protection ON by default */
 131         flash_protect(FLAG_PROTECT_SET,
 132                       CONFIG_SYS_MONITOR_BASE,
 133                       CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1,
 134                       &flash_info[0]);
 135 #endif
 136
 137 #ifdef  CONFIG_ENV_IS_IN_FLASH
 138         /* ENV protection ON by default */
 139         flash_protect(FLAG_PROTECT_SET,
 140                       CONFIG_ENV_ADDR,
 141                       CONFIG_ENV_ADDR+CONFIG_ENV_SECT_SIZE-1,
 142                       &flash_info[0]);
 143 #endif
 144
 145         if (size_b1) {
 146                 memctl->memc_or1 = CONFIG_SYS_OR_TIMING_FLASH | (-size_b1 & OR_AM_MSK);
 147                 memctl->memc_br1 = ((CONFIG_SYS_FLASH_BASE + size_b0) & BR_BA_MSK) |
 148                                    BR_MS_GPCM | BR_V;
 149
 150                 DEBUGF("## BR1: 0x%08x    OR1: 0x%08x\n",
 151                         memctl->memc_br1, memctl->memc_or1);
 152
 153                 /* Re-do sizing to get full correct info */
 154                 size_b1 = flash_get_size((vu_long *)(CONFIG_SYS_FLASH_BASE + size_b0),
 155                                           &flash_info[1]);
 156
 157                 flash_info[1].size = size_b1;
 158
 159                 flash_get_offsets (CONFIG_SYS_FLASH_BASE + size_b0, &flash_info[1]);
 160
 161 # if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
 162                 /* monitor protection ON by default */
 163                 flash_protect(FLAG_PROTECT_SET,
 164                               CONFIG_SYS_MONITOR_BASE,
 165                               CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1,
 166                               &flash_info[1]);
 167 # endif
 168
 169 # ifdef CONFIG_ENV_IS_IN_FLASH
 170                 /* ENV protection ON by default */
 171                 flash_protect(FLAG_PROTECT_SET,
 172                               CONFIG_ENV_ADDR,
 173                               CONFIG_ENV_ADDR+CONFIG_ENV_SECT_SIZE-1,
 174                               &flash_info[1]);
 175 #endif
 176         } else {
 177 #ifndef CONFIG_AMX_RAM_EXT
 178                 memctl->memc_br1 = 0;           /* invalidate bank */
 179                 memctl->memc_or1 = 0;           /* invalidate bank */
 180 #endif
 181
 182                 DEBUGF("## DISABLE BR1: 0x%08x    OR1: 0x%08x\n",
 183                         memctl->memc_br1, memctl->memc_or1);
 184
 185                 flash_info[1].flash_id = FLASH_UNKNOWN;
 186                 flash_info[1].sector_count = -1;
 187                 flash_info[1].size = 0;
 188         }
 189
 190         DEBUGF("## Final Flash bank sizes: %08lx + 0x%08lx\n",size_b0,size_b1);
 191
 192         return (size_b0 + size_b1);
 193 }
 194
 195 /*-----------------------------------------------------------------------
 196  */
 197 static void flash_get_offsets (ulong base, flash_info_t *info)
 198 {
 199         int i;
 200
 201         /* set up sector start address table */
 202         if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) {
 203                 /* set sector offsets for uniform sector type   */
 204                 for (i = 0; i < info->sector_count; i++) {
 205                         info->start[i] = base + (i * 0x00040000);
 206                 }
 207         } else if (info->flash_id & FLASH_BTYPE) {
 208                 /* set sector offsets for bottom boot block type        */
 209                 info->start[0] = base + 0x00000000;
 210                 info->start[1] = base + 0x00008000;
 211                 info->start[2] = base + 0x0000C000;
 212                 info->start[3] = base + 0x00010000;
 213                 for (i = 4; i < info->sector_count; i++) {
 214                         info->start[i] = base + (i * 0x00020000) - 0x00060000;
 215                 }
 216         } else {
 217                 /* set sector offsets for top boot block type           */
 218                 i = info->sector_count - 1;
 219                 info->start[i--] = base + info->size - 0x00008000;
 220                 info->start[i--] = base + info->size - 0x0000C000;
 221                 info->start[i--] = base + info->size - 0x00010000;
 222                 for (; i >= 0; i--) {
 223                         info->start[i] = base + i * 0x00020000;
 224                 }
 225         }
 226 }
 227
 228 /*-----------------------------------------------------------------------
 229  */
 230 void flash_print_info  (flash_info_t *info)
 231 {
 232         int i;
 233
 234         if (info->flash_id == FLASH_UNKNOWN) {
 235                 printf ("missing or unknown FLASH type\n");
 236                 return;
 237         }
 238
 239         switch (info->flash_id & FLASH_VENDMASK) {
 240         case FLASH_MAN_AMD:     printf ("AMD ");                break;
 241         case FLASH_MAN_FUJ:     printf ("FUJITSU ");            break;
 242         case FLASH_MAN_BM:      printf ("BRIGHT MICRO ");       break;
 243         default:                printf ("Unknown Vendor ");     break;
 244         }
 245
 246         switch (info->flash_id & FLASH_TYPEMASK) {
 247         case FLASH_AM040:       printf ("29F040 or 29LV040 (4 Mbit, uniform sectors)\n");
 248                                 break;
 249         case FLASH_AM400B:      printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
 250                                 break;
 251         case FLASH_AM400T:      printf ("AM29LV400T (4 Mbit, top boot sector)\n");
 252                                 break;
 253         case FLASH_AM800B:      printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
 254                                 break;
 255         case FLASH_AM800T:      printf ("AM29LV800T (8 Mbit, top boot sector)\n");
 256                                 break;
 257         case FLASH_AM160B:      printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
 258                                 break;
 259         case FLASH_AM160T:      printf ("AM29LV160T (16 Mbit, top boot sector)\n");
 260                                 break;
 261         case FLASH_AM320B:      printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
 262                                 break;
 263         case FLASH_AM320T:      printf ("AM29LV320T (32 Mbit, top boot sector)\n");
 264                                 break;
 265         default:                printf ("Unknown Chip Type\n");
 266                                 break;
 267         }
 268
 269         printf ("  Size: %ld MB in %d Sectors\n",
 270                 info->size >> 20, info->sector_count);
 271
 272         printf ("  Sector Start Addresses:");
 273         for (i=0; i<info->sector_count; ++i) {
 274                 if ((i % 5) == 0)
 275                         printf ("\n   ");
 276                 printf (" %08lX%s",
 277                         info->start[i],
 278                         info->protect[i] ? " (RO)" : "     "
 279                 );
 280         }
 281         printf ("\n");
 282 }
 283
 284 /*-----------------------------------------------------------------------
 285  */
 286
 287
 288 /*-----------------------------------------------------------------------
 289  */
 290
 291 /*
 292  * The following code cannot be run from FLASH!
 293  */
 294
 295 static ulong flash_get_size (vu_long *addr, flash_info_t *info)
 296 {
 297         short i;
 298         ulong value;
 299         ulong base = (ulong)addr;
 300
 301         /* Write auto select command: read Manufacturer ID */
 302         addr[0x0555] = 0x00AA00AA;
 303         addr[0x02AA] = 0x00550055;
 304         addr[0x0555] = 0x00900090;
 305
 306         value = addr[0];
 307
 308         DEBUGF("Manuf. ID @ 0x%08lx: 0x%08lx\n", (ulong)addr, value);
 309
 310         switch (value) {
 311         case AMD_MANUFACT:
 312                 info->flash_id = FLASH_MAN_AMD;
 313                 break;
 314         case FUJ_MANUFACT:
 315                 info->flash_id = FLASH_MAN_FUJ;
 316                 break;
 317         default:
 318                 info->flash_id = FLASH_UNKNOWN;
 319                 info->sector_count = 0;
 320                 info->size = 0;
 321                 return (0);                     /* no or unknown flash  */
 322         }
 323
 324         value = addr[1];                        /* device ID            */
 325
 326         DEBUGF("Device ID @ 0x%08lx: 0x%08lx\n", (ulong)(&addr[1]), value);
 327
 328         switch (value) {
 329         case AMD_ID_F040B:
 330                 info->flash_id += FLASH_AM040;
 331                 info->sector_count = 8;
 332                 info->size = 0x00200000;
 333                 break;                          /* => 2 MB              */
 334
 335         case AMD_ID_LV400T:
 336                 info->flash_id += FLASH_AM400T;
 337                 info->sector_count = 11;
 338                 info->size = 0x00100000;
 339                 break;                          /* => 1 MB              */
 340
 341         case AMD_ID_LV400B:
 342                 info->flash_id += FLASH_AM400B;
 343                 info->sector_count = 11;
 344                 info->size = 0x00100000;
 345                 break;                          /* => 1 MB              */
 346
 347         case AMD_ID_LV800T:
 348                 info->flash_id += FLASH_AM800T;
 349                 info->sector_count = 19;
 350                 info->size = 0x00200000;
 351                 break;                          /* => 2 MB              */
 352
 353         case AMD_ID_LV800B:
 354                 info->flash_id += FLASH_AM800B;
 355                 info->sector_count = 19;
 356                 info->size = 0x00200000;
 357                 break;                          /* => 2 MB              */
 358
 359         case AMD_ID_LV160T:
 360                 info->flash_id += FLASH_AM160T;
 361                 info->sector_count = 35;
 362                 info->size = 0x00400000;
 363                 break;                          /* => 4 MB              */
 364
 365         case AMD_ID_LV160B:
 366                 info->flash_id += FLASH_AM160B;
 367                 info->sector_count = 35;
 368                 info->size = 0x00400000;
 369                 break;                          /* => 4 MB              */
 370 #if 0   /* enable when device IDs are available */
 371         case AMD_ID_LV320T:
 372                 info->flash_id += FLASH_AM320T;
 373                 info->sector_count = 67;
 374                 info->size = 0x00800000;
 375                 break;                          /* => 8 MB              */
 376
 377         case AMD_ID_LV320B:
 378                 info->flash_id += FLASH_AM320B;
 379                 info->sector_count = 67;
 380                 info->size = 0x00800000;
 381                 break;                          /* => 8 MB              */
 382 #endif
 383         default:
 384                 info->flash_id = FLASH_UNKNOWN;
 385                 return (0);                     /* => no or unknown flash */
 386         }
 387
 388         /* set up sector start address table */
 389         if (info->flash_id & FLASH_BTYPE) {
 390                 /* set sector offsets for bottom boot block type        */
 391                 info->start[0] = base + 0x00000000;
 392                 info->start[1] = base + 0x00008000;
 393                 info->start[2] = base + 0x0000C000;
 394                 info->start[3] = base + 0x00010000;
 395                 for (i = 4; i < info->sector_count; i++) {
 396                         info->start[i] = base + (i * 0x00020000) - 0x00060000;
 397                 }
 398         } else {
 399                 /* set sector offsets for top boot block type           */
 400                 i = info->sector_count - 1;
 401                 info->start[i--] = base + info->size - 0x00008000;
 402                 info->start[i--] = base + info->size - 0x0000C000;
 403                 info->start[i--] = base + info->size - 0x00010000;
 404                 for (; i >= 0; i--) {
 405                         info->start[i] = base + i * 0x00020000;
 406                 }
 407         }
 408
 409         /* check for protected sectors */
 410         for (i = 0; i < info->sector_count; i++) {
 411                 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
 412                 /* D0 = 1 if protected */
 413                 addr = (volatile unsigned long *)(info->start[i]);
 414                 info->protect[i] = addr[2] & 1;
 415         }
 416
 417         /*
 418          * Prevent writes to uninitialized FLASH.
 419          */
 420         if (info->flash_id != FLASH_UNKNOWN) {
 421                 addr = (volatile unsigned long *)info->start[0];
 422
 423                 *addr = 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         vu_long *addr = (vu_long*)(info->start[0]);
 436         int flag, prot, sect, l_sect;
 437         ulong start, now, last;
 438
 439         if ((s_first < 0) || (s_first > s_last)) {
 440                 if (info->flash_id == FLASH_UNKNOWN) {
 441                         printf ("- missing\n");
 442                 } else {
 443                         printf ("- no sectors to erase\n");
 444                 }
 445                 return 1;
 446         }
 447
 448         if ((info->flash_id == FLASH_UNKNOWN) ||
 449             (info->flash_id > FLASH_AMD_COMP)) {
 450                 printf ("Can't erase unknown flash type %08lx - aborted\n",
 451                         info->flash_id);
 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         addr[0x0555] = 0x00AA00AA;
 475         addr[0x02AA] = 0x00550055;
 476         addr[0x0555] = 0x00800080;
 477         addr[0x0555] = 0x00AA00AA;
 478         addr[0x02AA] = 0x00550055;
 479
 480         /* Start erase on unprotected sectors */
 481         for (sect = s_first; sect<=s_last; sect++) {
 482                 if (info->protect[sect] == 0) { /* not protected */
 483                         addr = (vu_long*)(info->start[sect]);
 484                         addr[0] = 0x00300030;
 485                         l_sect = sect;
 486                 }
 487         }
 488
 489         /* re-enable interrupts if necessary */
 490         if (flag)
 491                 enable_interrupts();
 492
 493         /* wait at least 80us - let's wait 1 ms */
 494         udelay (1000);
 495
 496         /*
 497          * We wait for the last triggered sector
 498          */
 499         if (l_sect < 0)
 500                 goto DONE;
 501
 502         start = get_timer (0);
 503         last  = start;
 504         addr = (vu_long*)(info->start[l_sect]);
 505         while ((addr[0] & 0x00800080) != 0x00800080) {
 506                 if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 507                         printf ("Timeout\n");
 508                         return 1;
 509                 }
 510                 /* show that we're waiting */
 511                 if ((now - last) > 1000) {      /* every second */
 512                         putc ('.');
 513                         last = now;
 514                 }
 515         }
 516
 517 DONE:
 518         /* reset to read mode */
 519         addr = (volatile unsigned long *)info->start[0];
 520         addr[0] = 0x00F000F0;   /* reset bank */
 521
 522         printf (" done\n");
 523         return 0;
 524 }
 525
 526 /*-----------------------------------------------------------------------
 527  * Copy memory to flash, returns:
 528  * 0 - OK
 529  * 1 - write timeout
 530  * 2 - Flash not erased
 531  */
 532
 533 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 534 {
 535         ulong cp, wp, data;
 536         int i, l, rc;
 537
 538         wp = (addr & ~3);       /* get lower word aligned address */
 539
 540         /*
 541          * handle unaligned start bytes
 542          */
 543         if ((l = addr - wp) != 0) {
 544                 data = 0;
 545                 for (i=0, cp=wp; i<l; ++i, ++cp) {
 546                         data = (data << 8) | (*(uchar *)cp);
 547                 }
 548                 for (; i<4 && cnt>0; ++i) {
 549                         data = (data << 8) | *src++;
 550                         --cnt;
 551                         ++cp;
 552                 }
 553                 for (; cnt==0 && i<4; ++i, ++cp) {
 554                         data = (data << 8) | (*(uchar *)cp);
 555                 }
 556
 557                 if ((rc = write_word(info, wp, data)) != 0) {
 558                         return (rc);
 559                 }
 560                 wp += 4;
 561         }
 562
 563         /*
 564          * handle word aligned part
 565          */
 566         while (cnt >= 4) {
 567                 data = 0;
 568                 for (i=0; i<4; ++i) {
 569                         data = (data << 8) | *src++;
 570                 }
 571                 if ((rc = write_word(info, wp, data)) != 0) {
 572                         return (rc);
 573                 }
 574                 wp  += 4;
 575                 cnt -= 4;
 576         }
 577
 578         if (cnt == 0) {
 579                 return (0);
 580         }
 581
 582         /*
 583          * handle unaligned tail bytes
 584          */
 585         data = 0;
 586         for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
 587                 data = (data << 8) | *src++;
 588                 --cnt;
 589         }
 590         for (; i<4; ++i, ++cp) {
 591                 data = (data << 8) | (*(uchar *)cp);
 592         }
 593
 594         return (write_word(info, wp, data));
 595 }
 596
 597 /*-----------------------------------------------------------------------
 598  * Write a word to Flash, returns:
 599  * 0 - OK
 600  * 1 - write timeout
 601  * 2 - Flash not erased
 602  */
 603 static int write_word (flash_info_t *info, ulong dest, ulong data)
 604 {
 605         vu_long *addr = (vu_long*)(info->start[0]);
 606         ulong start;
 607         int flag;
 608
 609         /* Check if Flash is (sufficiently) erased */
 610         if ((*((vu_long *)dest) & data) != data) {
 611                 return (2);
 612         }
 613         /* Disable interrupts which might cause a timeout here */
 614         flag = disable_interrupts();
 615
 616         addr[0x0555] = 0x00AA00AA;
 617         addr[0x02AA] = 0x00550055;
 618         addr[0x0555] = 0x00A000A0;
 619
 620         *((vu_long *)dest) = data;
 621
 622         /* re-enable interrupts if necessary */
 623         if (flag)
 624                 enable_interrupts();
 625
 626         /* data polling for D7 */
 627         start = get_timer (0);
 628         while ((*((vu_long *)dest) & 0x00800080) != (data & 0x00800080)) {
 629                 if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
 630                         return (1);
 631                 }
 632         }
 633         return (0);
 634 }
 635
 636 /*-----------------------------------------------------------------------
 637  */