qemu/roms/u-boot/board/lwmon/flash.c

   1 /*
   2  * (C) Copyright 2001
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 /* #define DEBUG */
   9
  10 #include <common.h>
  11 #include <mpc8xx.h>
  12
  13 #if defined(CONFIG_ENV_IS_IN_FLASH)
  14 # ifndef  CONFIG_ENV_ADDR
  15 #  define CONFIG_ENV_ADDR       (CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET)
  16 # endif
  17 # ifndef  CONFIG_ENV_SIZE
  18 #  define CONFIG_ENV_SIZE       CONFIG_ENV_SECT_SIZE
  19 # endif
  20 # ifndef  CONFIG_ENV_SECT_SIZE
  21 #  define CONFIG_ENV_SECT_SIZE  CONFIG_ENV_SIZE
  22 # endif
  23 #endif
  24
  25 /*---------------------------------------------------------------------*/
  26
  27 flash_info_t    flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
  28
  29 /*-----------------------------------------------------------------------
  30  * Functions
  31  */
  32 static ulong flash_get_size (vu_long *addr, flash_info_t *info);
  33 static int write_data (flash_info_t *info, ulong dest, ulong data);
  34 #ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE
  35 static int write_data_buf (flash_info_t * info, ulong dest, uchar * cp, int len);
  36 #endif
  37 static void flash_get_offsets (ulong base, flash_info_t *info);
  38
  39 /*-----------------------------------------------------------------------
  40  */
  41
  42 unsigned long flash_init (void)
  43 {
  44         volatile immap_t     *immap  = (immap_t *)CONFIG_SYS_IMMR;
  45         volatile memctl8xx_t *memctl = &immap->im_memctl;
  46         unsigned long size_b0, size_b1;
  47         int i;
  48
  49         /* Init: no FLASHes known */
  50         for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
  51                 flash_info[i].flash_id = FLASH_UNKNOWN;
  52         }
  53
  54         /* Static FLASH Bank configuration here - FIXME XXX */
  55
  56         debug ("\n## Get flash bank 1 size @ 0x%08x\n",FLASH_BASE0_PRELIM);
  57
  58         size_b0 = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]);
  59
  60         if (flash_info[0].flash_id == FLASH_UNKNOWN) {
  61                 printf ("## Unknown FLASH on Bank 0: "
  62                         "ID 0x%lx, Size = 0x%08lx = %ld MB\n",
  63                         flash_info[0].flash_id,
  64                         size_b0, size_b0<<20);
  65         }
  66
  67         debug ("## Get flash bank 2 size @ 0x%08x\n",FLASH_BASE1_PRELIM);
  68
  69         size_b1 = flash_get_size((vu_long *)FLASH_BASE1_PRELIM, &flash_info[1]);
  70
  71         debug ("## Prelim. Flash bank sizes: %08lx + 0x%08lx\n",size_b0,size_b1);
  72
  73         if (size_b1 > size_b0) {
  74                 printf ("## ERROR: "
  75                         "Bank 1 (0x%08lx = %ld MB) > Bank 0 (0x%08lx = %ld MB)\n",
  76                         size_b1, size_b1<<20,
  77                         size_b0, size_b0<<20
  78                 );
  79                 flash_info[0].flash_id  = FLASH_UNKNOWN;
  80                 flash_info[1].flash_id  = FLASH_UNKNOWN;
  81                 flash_info[0].sector_count      = -1;
  82                 flash_info[1].sector_count      = -1;
  83                 flash_info[0].size              = 0;
  84                 flash_info[1].size              = 0;
  85                 return (0);
  86         }
  87
  88         debug  ("## Before remap: "
  89                 "BR0: 0x%08x    OR0: 0x%08x    "
  90                 "BR1: 0x%08x    OR1: 0x%08x\n",
  91                 memctl->memc_br0, memctl->memc_or0,
  92                 memctl->memc_br1, memctl->memc_or1);
  93
  94         /* Remap FLASH according to real size */
  95         memctl->memc_or0 = (-size_b0 & 0xFFFF8000) | CONFIG_SYS_OR_TIMING_FLASH |
  96                                 OR_CSNT_SAM | OR_ACS_DIV1;
  97         memctl->memc_br0 = (CONFIG_SYS_FLASH_BASE & BR_BA_MSK) | BR_PS_32 | BR_V;
  98
  99         debug ("## BR0: 0x%08x    OR0: 0x%08x\n",
 100                 memctl->memc_br0, memctl->memc_or0);
 101
 102         /* Re-do sizing to get full correct info */
 103         size_b0 = flash_get_size((vu_long *)CONFIG_SYS_FLASH_BASE, &flash_info[0]);
 104
 105         flash_get_offsets (CONFIG_SYS_FLASH_BASE, &flash_info[0]);
 106
 107         flash_info[0].size = size_b0;
 108
 109 #if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
 110         /* monitor protection ON by default */
 111         flash_protect(FLAG_PROTECT_SET,
 112                       CONFIG_SYS_MONITOR_BASE,
 113                       CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1,
 114                       &flash_info[0]);
 115 #endif
 116
 117 #ifdef  CONFIG_ENV_IS_IN_FLASH
 118         /* ENV protection ON by default */
 119         flash_protect(FLAG_PROTECT_SET,
 120                       CONFIG_ENV_ADDR,
 121                       CONFIG_ENV_ADDR+CONFIG_ENV_SECT_SIZE-1,
 122                       &flash_info[0]);
 123 #endif
 124
 125         if (size_b1) {
 126                 memctl->memc_or1 = (-size_b1 & 0xFFFF8000) | CONFIG_SYS_OR_TIMING_FLASH |
 127                                         OR_CSNT_SAM | OR_ACS_DIV1;
 128                 memctl->memc_br1 = ((CONFIG_SYS_FLASH_BASE + size_b0) & BR_BA_MSK) |
 129                                         BR_PS_32 | BR_V;
 130
 131                 debug ("## BR1: 0x%08x    OR1: 0x%08x\n",
 132                         memctl->memc_br1, memctl->memc_or1);
 133
 134                 /* Re-do sizing to get full correct info */
 135                 size_b1 = flash_get_size((vu_long *)(CONFIG_SYS_FLASH_BASE + size_b0),
 136                                           &flash_info[1]);
 137
 138                 flash_info[1].size = size_b1;
 139
 140                 flash_get_offsets (CONFIG_SYS_FLASH_BASE + size_b0, &flash_info[1]);
 141
 142 #if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
 143                 /* monitor protection ON by default */
 144                 flash_protect(FLAG_PROTECT_SET,
 145                               CONFIG_SYS_MONITOR_BASE,
 146                               CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1,
 147                               &flash_info[1]);
 148 #endif
 149
 150 #ifdef  CONFIG_ENV_IS_IN_FLASH
 151                 /* ENV protection ON by default */
 152                 flash_protect(FLAG_PROTECT_SET,
 153                               CONFIG_ENV_ADDR,
 154                               CONFIG_ENV_ADDR+CONFIG_ENV_SECT_SIZE-1,
 155                               &flash_info[1]);
 156 #endif
 157         } else {
 158                 memctl->memc_br1 = 0;           /* invalidate bank */
 159                 memctl->memc_or1 = 0;           /* invalidate bank */
 160
 161                 debug ("## DISABLE BR1: 0x%08x    OR1: 0x%08x\n",
 162                         memctl->memc_br1, memctl->memc_or1);
 163
 164                 flash_info[1].flash_id = FLASH_UNKNOWN;
 165                 flash_info[1].sector_count = -1;
 166                 flash_info[1].size = 0;
 167         }
 168
 169         debug ("## Final Flash bank sizes: %08lx + 0x%08lx\n",size_b0,size_b1);
 170
 171         return (size_b0 + size_b1);
 172 }
 173
 174 /*-----------------------------------------------------------------------
 175  */
 176 static void flash_get_offsets (ulong base, flash_info_t *info)
 177 {
 178         int i;
 179
 180         if (info->flash_id == FLASH_UNKNOWN) {
 181                 return;
 182         }
 183
 184         switch (info->flash_id & FLASH_VENDMASK) {
 185         case FLASH_MAN_INTEL:
 186             for (i = 0; i < info->sector_count; i++) {
 187                 info->start[i] = base;
 188                 base += 0x00020000 * 2;         /* 128k * 2 chips per bank */
 189             }
 190             return;
 191
 192         default:
 193             printf ("Don't know sector ofsets for flash type 0x%lx\n",
 194                 info->flash_id);
 195             return;
 196         }
 197 }
 198
 199 /*-----------------------------------------------------------------------
 200  */
 201 void flash_print_info  (flash_info_t *info)
 202 {
 203         int i;
 204
 205         if (info->flash_id == FLASH_UNKNOWN) {
 206                 printf ("missing or unknown FLASH type\n");
 207                 return;
 208         }
 209
 210         switch (info->flash_id & FLASH_VENDMASK) {
 211         case FLASH_MAN_AMD:     printf ("AMD ");                break;
 212         case FLASH_MAN_FUJ:     printf ("Fujitsu ");            break;
 213         case FLASH_MAN_SST:     printf ("SST ");                break;
 214         case FLASH_MAN_STM:     printf ("STM ");                break;
 215         case FLASH_MAN_INTEL:   printf ("Intel ");              break;
 216         case FLASH_MAN_MT:      printf ("MT ");                 break;
 217         default:                printf ("Unknown Vendor ");     break;
 218         }
 219
 220         switch (info->flash_id & FLASH_TYPEMASK) {
 221         case FLASH_28F320J3A:   printf ("28F320J3A (32Mbit = 128K x 32)\n");
 222                                 break;
 223         case FLASH_28F640J3A:   printf ("28F640J3A (64Mbit = 128K x 64)\n");
 224                                 break;
 225         case FLASH_28F128J3A:   printf ("28F128J3A (128Mbit = 128K x 128)\n");
 226                                 break;
 227         default:                printf ("Unknown Chip Type\n");
 228                                 break;
 229         }
 230
 231         if (info->size >= (1 << 20)) {
 232                 i = 20;
 233         } else {
 234                 i = 10;
 235         }
 236         printf ("  Size: %ld %cB in %d Sectors\n",
 237                 info->size >> i,
 238                 (i == 20) ? 'M' : 'k',
 239                 info->sector_count);
 240
 241         printf ("  Sector Start Addresses:");
 242         for (i=0; i<info->sector_count; ++i) {
 243                 if ((i % 5) == 0)
 244                         printf ("\n   ");
 245                 printf (" %08lX%s",
 246                         info->start[i],
 247                         info->protect[i] ? " (RO)" : "     "
 248                 );
 249         }
 250         printf ("\n");
 251         return;
 252 }
 253
 254 /*-----------------------------------------------------------------------
 255  */
 256
 257
 258 /*-----------------------------------------------------------------------
 259  */
 260
 261 /*
 262  * The following code cannot be run from FLASH!
 263  */
 264
 265 static ulong flash_get_size (vu_long *addr, flash_info_t *info)
 266 {
 267         ulong value;
 268
 269         /* Read Manufacturer ID */
 270         addr[0] = 0x00900090;
 271         value = addr[0];
 272
 273         debug ("Manuf. ID @ 0x%08lx: 0x%08lx\n", (ulong)addr, value);
 274
 275         switch (value) {
 276         case AMD_MANUFACT:
 277                 info->flash_id = FLASH_MAN_AMD;
 278                 break;
 279         case FUJ_MANUFACT:
 280                 info->flash_id = FLASH_MAN_FUJ;
 281                 break;
 282         case SST_MANUFACT:
 283                 info->flash_id = FLASH_MAN_SST;
 284                 break;
 285         case STM_MANUFACT:
 286                 info->flash_id = FLASH_MAN_STM;
 287                 break;
 288         case INTEL_MANUFACT:
 289                 info->flash_id = FLASH_MAN_INTEL;
 290                 break;
 291         default:
 292                 info->flash_id = FLASH_UNKNOWN;
 293                 info->sector_count = 0;
 294                 info->size = 0;
 295                 addr[0] = 0x00FF00FF;           /* restore read mode */
 296                 return (0);                     /* no or unknown flash  */
 297         }
 298
 299         value = addr[1];                        /* device ID            */
 300
 301         debug ("Device ID @ 0x%08lx: 0x%08lx\n", (ulong)(&addr[1]), value);
 302
 303         switch (value) {
 304         case INTEL_ID_28F320J3A:
 305                 info->flash_id += FLASH_28F320J3A;
 306                 info->sector_count = 32;
 307                 info->size = 0x00400000 * 2;
 308                 break;                          /* =>  8 MB             */
 309
 310         case INTEL_ID_28F640J3A:
 311                 info->flash_id += FLASH_28F640J3A;
 312                 info->sector_count = 64;
 313                 info->size = 0x00800000 * 2;
 314                 break;                          /* => 16 MB             */
 315
 316         case INTEL_ID_28F128J3A:
 317                 info->flash_id += FLASH_28F128J3A;
 318                 info->sector_count = 128;
 319                 info->size = 0x01000000 * 2;
 320                 break;                          /* => 32 MB             */
 321
 322         default:
 323                 info->flash_id = FLASH_UNKNOWN;
 324                 addr[0] = 0x00FF00FF;           /* restore read mode */
 325                 return (0);                     /* => no or unknown flash */
 326
 327         }
 328
 329         if (info->sector_count > CONFIG_SYS_MAX_FLASH_SECT) {
 330                 printf ("** ERROR: sector count %d > max (%d) **\n",
 331                         info->sector_count, CONFIG_SYS_MAX_FLASH_SECT);
 332                 info->sector_count = CONFIG_SYS_MAX_FLASH_SECT;
 333         }
 334
 335         addr[0] = 0x00FF00FF;           /* restore read mode */
 336
 337         return (info->size);
 338 }
 339
 340
 341 /*-----------------------------------------------------------------------
 342  */
 343
 344 int     flash_erase (flash_info_t *info, int s_first, int s_last)
 345 {
 346         int flag, prot, sect;
 347         ulong start, now, last;
 348
 349         debug ("flash_erase: first: %d last: %d\n", s_first, s_last);
 350
 351         if ((s_first < 0) || (s_first > s_last)) {
 352                 if (info->flash_id == FLASH_UNKNOWN) {
 353                         printf ("- missing\n");
 354                 } else {
 355                         printf ("- no sectors to erase\n");
 356                 }
 357                 return 1;
 358         }
 359
 360         if ((info->flash_id & FLASH_VENDMASK) != FLASH_MAN_INTEL) {
 361                 printf ("Can erase only Intel flash types - aborted\n");
 362                 return 1;
 363         }
 364
 365         prot = 0;
 366         for (sect=s_first; sect<=s_last; ++sect) {
 367                 if (info->protect[sect]) {
 368                         prot++;
 369                 }
 370         }
 371
 372         if (prot) {
 373                 printf ("- Warning: %d protected sectors will not be erased!\n",
 374                         prot);
 375         } else {
 376                 printf ("\n");
 377         }
 378
 379         start = get_timer (0);
 380         last  = start;
 381         /* Start erase on unprotected sectors */
 382         for (sect = s_first; sect<=s_last; sect++) {
 383                 if (info->protect[sect] == 0) { /* not protected */
 384                         vu_long *addr = (vu_long *)(info->start[sect]);
 385                         unsigned long status;
 386
 387                         /* Disable interrupts which might cause a timeout here */
 388                         flag = disable_interrupts();
 389
 390                         *addr = 0x00600060;     /* clear lock bit setup */
 391                         *addr = 0x00D000D0;     /* clear lock bit confirm */
 392
 393                         udelay (1000);
 394                         /* This takes awfully long - up to 50 ms and more */
 395                         while (((status = *addr) & 0x00800080) != 0x00800080) {
 396                                 if ((now=get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 397                                         printf ("Timeout\n");
 398                                         *addr = 0x00FF00FF; /* reset to read mode */
 399                                         return 1;
 400                                 }
 401
 402                                 /* show that we're waiting */
 403                                 if ((now - last) > 1000) {      /* every second */
 404                                         putc ('.');
 405                                         last = now;
 406                                 }
 407                                 udelay (1000);  /* to trigger the watchdog */
 408                         }
 409
 410                         *addr = 0x00500050;     /* clear status register */
 411                         *addr = 0x00200020;     /* erase setup */
 412                         *addr = 0x00D000D0;     /* erase confirm */
 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                         while (((status = *addr) & 0x00800080) != 0x00800080) {
 422                                 if ((now=get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 423                                         printf ("Timeout\n");
 424                                         *addr = 0x00B000B0; /* suspend erase      */
 425                                         *addr = 0x00FF00FF; /* reset to read mode */
 426                                         return 1;
 427                                 }
 428
 429                                 /* show that we're waiting */
 430                                 if ((now - last) > 1000) {      /* every second */
 431                                         putc ('.');
 432                                         last = now;
 433                                 }
 434                                 udelay (1000);  /* to trigger the watchdog */
 435                         }
 436
 437                         *addr = 0x00FF00FF;     /* reset to read mode */
 438                 }
 439         }
 440         printf (" done\n");
 441         return 0;
 442 }
 443
 444 /*-----------------------------------------------------------------------
 445  * Copy memory to flash, returns:
 446  * 0 - OK
 447  * 1 - write timeout
 448  * 2 - Flash not erased
 449  * 4 - Flash not identified
 450  */
 451
 452 #define FLASH_WIDTH     4       /* flash bus width in bytes */
 453
 454 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 455 {
 456         ulong cp, wp, data;
 457         int i, l, rc;
 458
 459         if (info->flash_id == FLASH_UNKNOWN) {
 460                 return 4;
 461         }
 462
 463         wp = (addr & ~(FLASH_WIDTH-1)); /* get lower FLASH_WIDTH aligned address */
 464
 465         /*
 466          * handle unaligned start bytes
 467          */
 468         if ((l = addr - wp) != 0) {
 469                 data = 0;
 470                 for (i=0, cp=wp; i<l; ++i, ++cp) {
 471                         data = (data << 8) | (*(uchar *)cp);
 472                 }
 473                 for (; i<FLASH_WIDTH && cnt>0; ++i) {
 474                         data = (data << 8) | *src++;
 475                         --cnt;
 476                         ++cp;
 477                 }
 478                 for (; cnt==0 && i<FLASH_WIDTH; ++i, ++cp) {
 479                         data = (data << 8) | (*(uchar *)cp);
 480                 }
 481
 482                 if ((rc = write_data(info, wp, data)) != 0) {
 483                         return (rc);
 484                 }
 485                 wp += FLASH_WIDTH;
 486         }
 487
 488         /*
 489          * handle FLASH_WIDTH aligned part
 490          */
 491 #ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE
 492         while(cnt >= FLASH_WIDTH) {
 493                 i = CONFIG_SYS_FLASH_BUFFER_SIZE > cnt ?
 494                     (cnt & ~(FLASH_WIDTH - 1)) : CONFIG_SYS_FLASH_BUFFER_SIZE;
 495                 if((rc = write_data_buf(info, wp, src,i)) != 0)
 496                         return rc;
 497                 wp += i;
 498                 src += i;
 499                 cnt -=i;
 500         }
 501 #else
 502         while (cnt >= FLASH_WIDTH) {
 503                 data = 0;
 504                 for (i=0; i<FLASH_WIDTH; ++i) {
 505                         data = (data << 8) | *src++;
 506                 }
 507                 if ((rc = write_data(info, wp, data)) != 0) {
 508                         return (rc);
 509                 }
 510                 wp  += FLASH_WIDTH;
 511                 cnt -= FLASH_WIDTH;
 512         }
 513 #endif /* CONFIG_SYS_FLASH_USE_BUFFER_WRITE */
 514
 515         if (cnt == 0) {
 516                 return (0);
 517         }
 518
 519         /*
 520          * handle unaligned tail bytes
 521          */
 522         data = 0;
 523         for (i=0, cp=wp; i<FLASH_WIDTH && cnt>0; ++i, ++cp) {
 524                 data = (data << 8) | *src++;
 525                 --cnt;
 526         }
 527         for (; i<FLASH_WIDTH; ++i, ++cp) {
 528                 data = (data << 8) | (*(uchar *)cp);
 529         }
 530
 531         return (write_data(info, wp, data));
 532 }
 533
 534 /*-----------------------------------------------------------------------
 535  * Check flash status, returns:
 536  * 0 - OK
 537  * 1 - timeout
 538  */
 539 static int flash_status_check(vu_long *addr, ulong tout, char * prompt)
 540 {
 541         ulong status;
 542         ulong start;
 543
 544         /* Wait for command completion */
 545         start = get_timer (0);
 546         while(((status = *addr) & 0x00800080) != 0x00800080) {
 547                 if (get_timer(start) > tout) {
 548                         printf("Flash %s timeout at address %p\n", prompt, addr);
 549                         *addr = 0x00FF00FF;     /* restore read mode */
 550                         return (1);
 551                 }
 552         }
 553         return 0;
 554 }
 555
 556 /*-----------------------------------------------------------------------
 557  * Write a word to Flash, returns:
 558  * 0 - OK
 559  * 1 - write timeout
 560  * 2 - Flash not erased
 561  */
 562 static int write_data (flash_info_t *info, ulong dest, ulong data)
 563 {
 564         vu_long *addr = (vu_long *)dest;
 565         int flag;
 566
 567         /* Check if Flash is (sufficiently) erased */
 568         if ((*addr & data) != data) {
 569                 return (2);
 570         }
 571         /* Disable interrupts which might cause a timeout here */
 572         flag = disable_interrupts();
 573
 574         *addr = 0x00400040;             /* write setup */
 575         *addr = data;
 576
 577         /* re-enable interrupts if necessary */
 578         if (flag)
 579                 enable_interrupts();
 580
 581         if (flash_status_check(addr, CONFIG_SYS_FLASH_WRITE_TOUT, "write") != 0) {
 582                 return (1);
 583         }
 584
 585         *addr = 0x00FF00FF;     /* restore read mode */
 586
 587         return (0);
 588 }
 589
 590 #ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE
 591 /*-----------------------------------------------------------------------
 592  * Write a buffer to Flash, returns:
 593  * 0 - OK
 594  * 1 - write timeout
 595  */
 596 static int write_data_buf(flash_info_t * info, ulong dest, uchar * cp, int len)
 597 {
 598         vu_long *addr = (vu_long *)dest;
 599         int sector;
 600         int cnt;
 601         int retcode;
 602         vu_long * src = (vu_long *)cp;
 603         vu_long * dst = (vu_long *)dest;
 604
 605         /* find sector */
 606         for(sector = info->sector_count - 1; sector >= 0; sector--) {
 607                 if(dest >= info->start[sector])
 608                         break;
 609         }
 610
 611         *addr = 0x00500050;             /* clear status */
 612         *addr = 0x00e800e8;             /* write buffer */
 613
 614         if((retcode = flash_status_check(addr, CONFIG_SYS_FLASH_BUFFER_WRITE_TOUT,
 615                                          "write to buffer")) == 0) {
 616                 cnt = len / FLASH_WIDTH;
 617                 *addr = (cnt-1) | ((cnt-1) << 16);
 618                 while(cnt-- > 0) {
 619                         *dst++ = *src++;
 620                 }
 621                 *addr = 0x00d000d0;             /* write buffer confirm */
 622                 retcode = flash_status_check(addr, CONFIG_SYS_FLASH_BUFFER_WRITE_TOUT,
 623                                                  "buffer write");
 624         }
 625         *addr = 0x00FF00FF;     /* restore read mode */
 626         *addr = 0x00500050;     /* clear status */
 627         return retcode;
 628 }
 629 #endif /* CONFIG_SYS_USE_FLASH_BUFFER_WRITE */
 630
 631 /*-----------------------------------------------------------------------
 632  */