common/cmd_nand.c

   1 /*
   2  * Driver for NAND support, Rick Bronson
   3  * borrowed heavily from:
   4  * (c) 1999 Machine Vision Holdings, Inc.
   5  * (c) 1999, 2000 David Woodhouse <dwmw2@infradead.org>
   6  *
   7  * Added 16-bit nand support
   8  * (C) 2004 Texas Instruments
   9  */
  10
  11 #include <common.h>
  12
  13
  14 /*
  15  *
  16  * New NAND support
  17  *
  18  */
  19 #include <common.h>
  20 #include <linux/mtd/mtd.h>
  21
  22 #if defined(CONFIG_CMD_NAND)
  23
  24 #include <command.h>
  25 #include <watchdog.h>
  26 #include <malloc.h>
  27 #include <asm/byteorder.h>
  28 #include <jffs2/jffs2.h>
  29 #include <nand.h>
  30
  31 #if defined(CONFIG_CMD_MTDPARTS)
  32
  33 /* parition handling routines */
  34 int mtdparts_init(void);
  35 int id_parse(const char *id, const char **ret_id, u8 *dev_type, u8 *dev_num);
  36 int find_dev_and_part(const char *id, struct mtd_device **dev,
  37                       u8 *part_num, struct part_info **part);
  38 #endif
  39
  40 static int nand_dump(nand_info_t *nand, ulong off, int only_oob)
  41 {
  42         int i;
  43         u_char *datbuf, *oobbuf, *p;
  44
  45         datbuf = malloc(nand->writesize + nand->oobsize);
  46         oobbuf = malloc(nand->oobsize);
  47         if (!datbuf || !oobbuf) {
  48                 puts("No memory for page buffer\n");
  49                 return 1;
  50         }
  51         off &= ~(nand->writesize - 1);
  52         loff_t addr = (loff_t) off;
  53         struct mtd_oob_ops ops;
  54         memset(&ops, 0, sizeof(ops));
  55         ops.datbuf = datbuf;
  56         ops.oobbuf = oobbuf; /* must exist, but oob data will be appended to ops.datbuf */
  57         ops.len = nand->writesize;
  58         ops.ooblen = nand->oobsize;
  59         ops.mode = MTD_OOB_RAW;
  60         i = nand->read_oob(nand, addr, &ops);
  61         if (i < 0) {
  62                 printf("Error (%d) reading page %08lx\n", i, off);
  63                 free(datbuf);
  64                 free(oobbuf);
  65                 return 1;
  66         }
  67         printf("Page %08lx dump:\n", off);
  68         i = nand->writesize >> 4;
  69         p = datbuf;
  70
  71         while (i--) {
  72                 if (!only_oob)
  73                         printf("\t%02x %02x %02x %02x %02x %02x %02x %02x"
  74                                "  %02x %02x %02x %02x %02x %02x %02x %02x\n",
  75                                p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7],
  76                                p[8], p[9], p[10], p[11], p[12], p[13], p[14],
  77                                p[15]);
  78                 p += 16;
  79         }
  80         puts("OOB:\n");
  81         i = nand->oobsize >> 3;
  82         while (i--) {
  83                 printf("\t%02x %02x %02x %02x %02x %02x %02x %02x\n",
  84                        p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7]);
  85                 p += 8;
  86         }
  87         free(datbuf);
  88         free(oobbuf);
  89
  90         return 0;
  91 }
  92
  93 /* ------------------------------------------------------------------------- */
  94
  95 static inline int str2long(char *p, ulong *num)
  96 {
  97         char *endptr;
  98
  99         *num = simple_strtoul(p, &endptr, 16);
 100         return (*p != '\0' && *endptr == '\0') ? 1 : 0;
 101 }
 102
 103 static int
 104 arg_off_size(int argc, char *argv[], nand_info_t *nand, ulong *off, size_t *size)
 105 {
 106         int idx = nand_curr_device;
 107 #if defined(CONFIG_CMD_MTDPARTS)
 108         struct mtd_device *dev;
 109         struct part_info *part;
 110         u8 pnum;
 111
 112         if (argc >= 1 && !(str2long(argv[0], off))) {
 113                 if ((mtdparts_init() == 0) &&
 114                     (find_dev_and_part(argv[0], &dev, &pnum, &part) == 0)) {
 115                         if (dev->id->type != MTD_DEV_TYPE_NAND) {
 116                                 puts("not a NAND device\n");
 117                                 return -1;
 118                         }
 119                         *off = part->offset;
 120                         if (argc >= 2) {
 121                                 if (!(str2long(argv[1], (ulong *)size))) {
 122                                         printf("'%s' is not a number\n", argv[1]);
 123                                         return -1;
 124                                 }
 125                                 if (*size > part->size)
 126                                         *size = part->size;
 127                         } else {
 128                                 *size = part->size;
 129                         }
 130                         idx = dev->id->num;
 131                         *nand = nand_info[idx];
 132                         goto out;
 133                 }
 134         }
 135 #endif
 136
 137         if (argc >= 1) {
 138                 if (!(str2long(argv[0], off))) {
 139                         printf("'%s' is not a number\n", argv[0]);
 140                         return -1;
 141                 }
 142         } else {
 143                 *off = 0;
 144         }
 145
 146         if (argc >= 2) {
 147                 if (!(str2long(argv[1], (ulong *)size))) {
 148                         printf("'%s' is not a number\n", argv[1]);
 149                         return -1;
 150                 }
 151         } else {
 152                 *size = nand->size - *off;
 153         }
 154
 155 #if defined(CONFIG_CMD_MTDPARTS)
 156 out:
 157 #endif
 158         printf("device %d ", idx);
 159         if (*size == nand->size)
 160                 puts("whole chip\n");
 161         else
 162                 printf("offset 0x%lx, size 0x%zx\n", *off, *size);
 163         return 0;
 164 }
 165
 166 #ifdef CONFIG_CMD_NAND_LOCK_UNLOCK
 167 static void print_status(ulong start, ulong end, ulong erasesize, int status)
 168 {
 169         printf("%08lx - %08lx: %08lx blocks %s%s%s\n",
 170                 start,
 171                 end - 1,
 172                 (end - start) / erasesize,
 173                 ((status & NAND_LOCK_STATUS_TIGHT) ?  "TIGHT " : ""),
 174                 ((status & NAND_LOCK_STATUS_LOCK) ?  "LOCK " : ""),
 175                 ((status & NAND_LOCK_STATUS_UNLOCK) ?  "UNLOCK " : ""));
 176 }
 177
 178 static void do_nand_status(nand_info_t *nand)
 179 {
 180         ulong block_start = 0;
 181         ulong off;
 182         int last_status = -1;
 183
 184         struct nand_chip *nand_chip = nand->priv;
 185         /* check the WP bit */
 186         nand_chip->cmdfunc(nand, NAND_CMD_STATUS, -1, -1);
 187         printf("device is %swrite protected\n",
 188                 (nand_chip->read_byte(nand) & 0x80 ?
 189                 "NOT " : ""));
 190
 191         for (off = 0; off < nand->size; off += nand->erasesize) {
 192                 int s = nand_get_lock_status(nand, off);
 193
 194                 /* print message only if status has changed */
 195                 if (s != last_status && off != 0) {
 196                         print_status(block_start, off, nand->erasesize,
 197                                         last_status);
 198                         block_start = off;
 199                 }
 200                 last_status = s;
 201         }
 202         /* Print the last block info */
 203         print_status(block_start, off, nand->erasesize, last_status);
 204 }
 205 #endif
 206
 207 static void nand_print_info(int idx)
 208 {
 209         nand_info_t *nand = &nand_info[idx];
 210         struct nand_chip *chip = nand->priv;
 211         printf("Device %d: ", idx);
 212         if (chip->numchips > 1)
 213                 printf("%dx ", chip->numchips);
 214         printf("%s, sector size %u KiB\n",
 215                nand->name, nand->erasesize >> 10);
 216 }
 217
 218 int do_nand(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
 219 {
 220         int i, dev, ret = 0;
 221         ulong addr, off;
 222         size_t size;
 223         char *cmd, *s;
 224         nand_info_t *nand;
 225 #ifdef CONFIG_SYS_NAND_QUIET
 226         int quiet = CONFIG_SYS_NAND_QUIET;
 227 #else
 228         int quiet = 0;
 229 #endif
 230         const char *quiet_str = getenv("quiet");
 231
 232         /* at least two arguments please */
 233         if (argc < 2)
 234                 goto usage;
 235
 236         if (quiet_str)
 237                 quiet = simple_strtoul(quiet_str, NULL, 0) != 0;
 238
 239         cmd = argv[1];
 240
 241         if (strcmp(cmd, "info") == 0) {
 242
 243                 putc('\n');
 244                 for (i = 0; i < CONFIG_SYS_MAX_NAND_DEVICE; i++) {
 245                         if (nand_info[i].name)
 246                                 nand_print_info(i);
 247                 }
 248                 return 0;
 249         }
 250
 251         if (strcmp(cmd, "device") == 0) {
 252
 253                 if (argc < 3) {
 254                         putc('\n');
 255                         if ((nand_curr_device < 0) ||
 256                             (nand_curr_device >= CONFIG_SYS_MAX_NAND_DEVICE))
 257                                 puts("no devices available\n");
 258                         else
 259                                 nand_print_info(nand_curr_device);
 260                         return 0;
 261                 }
 262                 dev = (int)simple_strtoul(argv[2], NULL, 10);
 263                 if (dev < 0 || dev >= CONFIG_SYS_MAX_NAND_DEVICE || !nand_info[dev].name) {
 264                         puts("No such device\n");
 265                         return 1;
 266                 }
 267                 printf("Device %d: %s", dev, nand_info[dev].name);
 268                 puts("... is now current device\n");
 269                 nand_curr_device = dev;
 270
 271 #ifdef CONFIG_SYS_NAND_SELECT_DEVICE
 272                 /*
 273                  * Select the chip in the board/cpu specific driver
 274                  */
 275                 board_nand_select_device(nand_info[dev].priv, dev);
 276 #endif
 277
 278                 return 0;
 279         }
 280
 281         if (strcmp(cmd, "bad") != 0 && strcmp(cmd, "erase") != 0 &&
 282             strncmp(cmd, "dump", 4) != 0 &&
 283             strncmp(cmd, "read", 4) != 0 && strncmp(cmd, "write", 5) != 0 &&
 284             strcmp(cmd, "scrub") != 0 && strcmp(cmd, "markbad") != 0 &&
 285             strcmp(cmd, "biterr") != 0 &&
 286             strcmp(cmd, "lock") != 0 && strcmp(cmd, "unlock") != 0 )
 287                 goto usage;
 288
 289         /* the following commands operate on the current device */
 290         if (nand_curr_device < 0 || nand_curr_device >= CONFIG_SYS_MAX_NAND_DEVICE ||
 291             !nand_info[nand_curr_device].name) {
 292                 puts("\nno devices available\n");
 293                 return 1;
 294         }
 295         nand = &nand_info[nand_curr_device];
 296
 297         if (strcmp(cmd, "bad") == 0) {
 298                 printf("\nDevice %d bad blocks:\n", nand_curr_device);
 299                 for (off = 0; off < nand->size; off += nand->erasesize)
 300                         if (nand_block_isbad(nand, off))
 301                                 printf("  %08lx\n", off);
 302                 return 0;
 303         }
 304
 305         /*
 306          * Syntax is:
 307          *   0    1     2       3    4
 308          *   nand erase [clean] [off size]
 309          */
 310         if (strcmp(cmd, "erase") == 0 || strcmp(cmd, "scrub") == 0) {
 311                 nand_erase_options_t opts;
 312                 /* "clean" at index 2 means request to write cleanmarker */
 313                 int clean = argc > 2 && !strcmp("clean", argv[2]);
 314                 int o = clean ? 3 : 2;
 315                 int scrub = !strcmp(cmd, "scrub");
 316
 317                 printf("\nNAND %s: ", scrub ? "scrub" : "erase");
 318                 /* skip first two or three arguments, look for offset and size */
 319                 if (arg_off_size(argc - o, argv + o, nand, &off, &size) != 0)
 320                         return 1;
 321
 322                 memset(&opts, 0, sizeof(opts));
 323                 opts.offset = off;
 324                 opts.length = size;
 325                 opts.jffs2  = clean;
 326                 opts.quiet  = quiet;
 327
 328                 if (scrub) {
 329                         puts("Warning: "
 330                              "scrub option will erase all factory set "
 331                              "bad blocks!\n"
 332                              "         "
 333                              "There is no reliable way to recover them.\n"
 334                              "         "
 335                              "Use this command only for testing purposes "
 336                              "if you\n"
 337                              "         "
 338                              "are sure of what you are doing!\n"
 339                              "\nReally scrub this NAND flash? <y/N>\n");
 340
 341                         if (getc() == 'y' && getc() == '\r') {
 342                                 opts.scrub = 1;
 343                         } else {
 344                                 puts("scrub aborted\n");
 345                                 return -1;
 346                         }
 347                 }
 348                 ret = nand_erase_opts(nand, &opts);
 349                 printf("%s\n", ret ? "ERROR" : "OK");
 350
 351                 return ret == 0 ? 0 : 1;
 352         }
 353
 354         if (strncmp(cmd, "dump", 4) == 0) {
 355                 if (argc < 3)
 356                         goto usage;
 357
 358                 s = strchr(cmd, '.');
 359                 off = (int)simple_strtoul(argv[2], NULL, 16);
 360
 361                 if (s != NULL && strcmp(s, ".oob") == 0)
 362                         ret = nand_dump(nand, off, 1);
 363                 else
 364                         ret = nand_dump(nand, off, 0);
 365
 366                 return ret == 0 ? 1 : 0;
 367
 368         }
 369
 370         if (strncmp(cmd, "read", 4) == 0 || strncmp(cmd, "write", 5) == 0) {
 371                 int read;
 372
 373                 if (argc < 4)
 374                         goto usage;
 375
 376                 addr = (ulong)simple_strtoul(argv[2], NULL, 16);
 377
 378                 read = strncmp(cmd, "read", 4) == 0; /* 1 = read, 0 = write */
 379                 printf("\nNAND %s: ", read ? "read" : "write");
 380                 if (arg_off_size(argc - 3, argv + 3, nand, &off, &size) != 0)
 381                         return 1;
 382
 383                 s = strchr(cmd, '.');
 384                 if (!s || !strcmp(s, ".jffs2") ||
 385                     !strcmp(s, ".e") || !strcmp(s, ".i")) {
 386                         if (read)
 387                                 ret = nand_read_skip_bad(nand, off, &size,
 388                                                          (u_char *)addr);
 389                         else
 390                                 ret = nand_write_skip_bad(nand, off, &size,
 391                                                           (u_char *)addr);
 392                 } else if (!strcmp(s, ".oob")) {
 393                         /* out-of-band data */
 394                         mtd_oob_ops_t ops = {
 395                                 .oobbuf = (u8 *)addr,
 396                                 .ooblen = size,
 397                                 .mode = MTD_OOB_RAW
 398                         };
 399
 400                         if (read)
 401                                 ret = nand->read_oob(nand, off, &ops);
 402                         else
 403                                 ret = nand->write_oob(nand, off, &ops);
 404                 } else {
 405                         printf("Unknown nand command suffix '%s'.\n", s);
 406                         return 1;
 407                 }
 408
 409                 printf(" %zu bytes %s: %s\n", size,
 410                        read ? "read" : "written", ret ? "ERROR" : "OK");
 411
 412                 return ret == 0 ? 0 : 1;
 413         }
 414
 415         if (strcmp(cmd, "markbad") == 0) {
 416                 argc -= 2;
 417                 argv += 2;
 418
 419                 if (argc <= 0)
 420                         goto usage;
 421
 422                 while (argc > 0) {
 423                         addr = simple_strtoul(*argv, NULL, 16);
 424
 425                         if (nand->block_markbad(nand, addr)) {
 426                                 printf("block 0x%08lx NOT marked "
 427                                         "as bad! ERROR %d\n",
 428                                         addr, ret);
 429                                 ret = 1;
 430                         } else {
 431                                 printf("block 0x%08lx successfully "
 432                                         "marked as bad\n",
 433                                         addr);
 434                         }
 435                         --argc;
 436                         ++argv;
 437                 }
 438                 return ret;
 439         }
 440
 441         if (strcmp(cmd, "biterr") == 0) {
 442                 /* todo */
 443                 return 1;
 444         }
 445
 446 #ifdef CONFIG_CMD_NAND_LOCK_UNLOCK
 447         if (strcmp(cmd, "lock") == 0) {
 448                 int tight = 0;
 449                 int status = 0;
 450                 if (argc == 3) {
 451                         if (!strcmp("tight", argv[2]))
 452                                 tight = 1;
 453                         if (!strcmp("status", argv[2]))
 454                                 status = 1;
 455                 }
 456                 if (status) {
 457                         do_nand_status(nand);
 458                 } else {
 459                         if (!nand_lock(nand, tight)) {
 460                                 puts("NAND flash successfully locked\n");
 461                         } else {
 462                                 puts("Error locking NAND flash\n");
 463                                 return 1;
 464                         }
 465                 }
 466                 return 0;
 467         }
 468
 469         if (strcmp(cmd, "unlock") == 0) {
 470                 if (arg_off_size(argc - 2, argv + 2, nand, &off, &size) < 0)
 471                         return 1;
 472
 473                 if (!nand_unlock(nand, off, size)) {
 474                         puts("NAND flash successfully unlocked\n");
 475                 } else {
 476                         puts("Error unlocking NAND flash, "
 477                              "write and erase will probably fail\n");
 478                         return 1;
 479                 }
 480                 return 0;
 481         }
 482 #endif
 483
 484 usage:
 485         cmd_usage(cmdtp);
 486         return 1;
 487 }
 488
 489 U_BOOT_CMD(nand, CONFIG_SYS_MAXARGS, 1, do_nand,
 490         "NAND sub-system",
 491         "info - show available NAND devices\n"
 492         "nand device [dev] - show or set current device\n"
 493         "nand read - addr off|partition size\n"
 494         "nand write - addr off|partition size\n"
 495         "    read/write 'size' bytes starting at offset 'off'\n"
 496         "    to/from memory address 'addr', skipping bad blocks.\n"
 497         "nand erase [clean] [off size] - erase 'size' bytes from\n"
 498         "    offset 'off' (entire device if not specified)\n"
 499         "nand bad - show bad blocks\n"
 500         "nand dump[.oob] off - dump page\n"
 501         "nand scrub - really clean NAND erasing bad blocks (UNSAFE)\n"
 502         "nand markbad off [...] - mark bad block(s) at offset (UNSAFE)\n"
 503         "nand biterr off - make a bit error at offset (UNSAFE)"
 504 #ifdef CONFIG_CMD_NAND_LOCK_UNLOCK
 505         "\n"
 506         "nand lock [tight] [status]\n"
 507         "    bring nand to lock state or display locked pages\n"
 508         "nand unlock [offset] [size] - unlock section"
 509 #endif
 510 );
 511
 512 static int nand_load_image(cmd_tbl_t *cmdtp, nand_info_t *nand,
 513                            ulong offset, ulong addr, char *cmd)
 514 {
 515         int r;
 516         char *ep, *s;
 517         size_t cnt;
 518         image_header_t *hdr;
 519 #if defined(CONFIG_FIT)
 520         const void *fit_hdr = NULL;
 521 #endif
 522
 523         s = strchr(cmd, '.');
 524         if (s != NULL &&
 525             (strcmp(s, ".jffs2") && strcmp(s, ".e") && strcmp(s, ".i"))) {
 526                 printf("Unknown nand load suffix '%s'\n", s);
 527                 show_boot_progress(-53);
 528                 return 1;
 529         }
 530
 531         printf("\nLoading from %s, offset 0x%lx\n", nand->name, offset);
 532
 533         cnt = nand->writesize;
 534         r = nand_read_skip_bad(nand, offset, &cnt, (u_char *) addr);
 535         if (r) {
 536                 puts("** Read error\n");
 537                 show_boot_progress (-56);
 538                 return 1;
 539         }
 540         show_boot_progress (56);
 541
 542         switch (genimg_get_format ((void *)addr)) {
 543         case IMAGE_FORMAT_LEGACY:
 544                 hdr = (image_header_t *)addr;
 545
 546                 show_boot_progress (57);
 547                 image_print_contents (hdr);
 548
 549                 cnt = image_get_image_size (hdr);
 550                 break;
 551 #if defined(CONFIG_FIT)
 552         case IMAGE_FORMAT_FIT:
 553                 fit_hdr = (const void *)addr;
 554                 puts ("Fit image detected...\n");
 555
 556                 cnt = fit_get_size (fit_hdr);
 557                 break;
 558 #endif
 559         default:
 560                 show_boot_progress (-57);
 561                 puts ("** Unknown image type\n");
 562                 return 1;
 563         }
 564         show_boot_progress (57);
 565
 566         r = nand_read_skip_bad(nand, offset, &cnt, (u_char *) addr);
 567         if (r) {
 568                 puts("** Read error\n");
 569                 show_boot_progress (-58);
 570                 return 1;
 571         }
 572         show_boot_progress (58);
 573
 574 #if defined(CONFIG_FIT)
 575         /* This cannot be done earlier, we need complete FIT image in RAM first */
 576         if (genimg_get_format ((void *)addr) == IMAGE_FORMAT_FIT) {
 577                 if (!fit_check_format (fit_hdr)) {
 578                         show_boot_progress (-150);
 579                         puts ("** Bad FIT image format\n");
 580                         return 1;
 581                 }
 582                 show_boot_progress (151);
 583                 fit_print_contents (fit_hdr);
 584         }
 585 #endif
 586
 587         /* Loading ok, update default load address */
 588
 589         load_addr = addr;
 590
 591         /* Check if we should attempt an auto-start */
 592         if (((ep = getenv("autostart")) != NULL) && (strcmp(ep, "yes") == 0)) {
 593                 char *local_args[2];
 594                 extern int do_bootm(cmd_tbl_t *, int, int, char *[]);
 595
 596                 local_args[0] = cmd;
 597                 local_args[1] = NULL;
 598
 599                 printf("Automatic boot of image at addr 0x%08lx ...\n", addr);
 600
 601                 do_bootm(cmdtp, 0, 1, local_args);
 602                 return 1;
 603         }
 604         return 0;
 605 }
 606
 607 int do_nandboot(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
 608 {
 609         char *boot_device = NULL;
 610         int idx;
 611         ulong addr, offset = 0;
 612 #if defined(CONFIG_CMD_MTDPARTS)
 613         struct mtd_device *dev;
 614         struct part_info *part;
 615         u8 pnum;
 616
 617         if (argc >= 2) {
 618                 char *p = (argc == 2) ? argv[1] : argv[2];
 619                 if (!(str2long(p, &addr)) && (mtdparts_init() == 0) &&
 620                     (find_dev_and_part(p, &dev, &pnum, &part) == 0)) {
 621                         if (dev->id->type != MTD_DEV_TYPE_NAND) {
 622                                 puts("Not a NAND device\n");
 623                                 return 1;
 624                         }
 625                         if (argc > 3)
 626                                 goto usage;
 627                         if (argc == 3)
 628                                 addr = simple_strtoul(argv[1], NULL, 16);
 629                         else
 630                                 addr = CONFIG_SYS_LOAD_ADDR;
 631                         return nand_load_image(cmdtp, &nand_info[dev->id->num],
 632                                                part->offset, addr, argv[0]);
 633                 }
 634         }
 635 #endif
 636
 637         show_boot_progress(52);
 638         switch (argc) {
 639         case 1:
 640                 addr = CONFIG_SYS_LOAD_ADDR;
 641                 boot_device = getenv("bootdevice");
 642                 break;
 643         case 2:
 644                 addr = simple_strtoul(argv[1], NULL, 16);
 645                 boot_device = getenv("bootdevice");
 646                 break;
 647         case 3:
 648                 addr = simple_strtoul(argv[1], NULL, 16);
 649                 boot_device = argv[2];
 650                 break;
 651         case 4:
 652                 addr = simple_strtoul(argv[1], NULL, 16);
 653                 boot_device = argv[2];
 654                 offset = simple_strtoul(argv[3], NULL, 16);
 655                 break;
 656         default:
 657 #if defined(CONFIG_CMD_MTDPARTS)
 658 usage:
 659 #endif
 660                 cmd_usage(cmdtp);
 661                 show_boot_progress(-53);
 662                 return 1;
 663         }
 664
 665         show_boot_progress(53);
 666         if (!boot_device) {
 667                 puts("\n** No boot device **\n");
 668                 show_boot_progress(-54);
 669                 return 1;
 670         }
 671         show_boot_progress(54);
 672
 673         idx = simple_strtoul(boot_device, NULL, 16);
 674
 675         if (idx < 0 || idx >= CONFIG_SYS_MAX_NAND_DEVICE || !nand_info[idx].name) {
 676                 printf("\n** Device %d not available\n", idx);
 677                 show_boot_progress(-55);
 678                 return 1;
 679         }
 680         show_boot_progress(55);
 681
 682         return nand_load_image(cmdtp, &nand_info[idx], offset, addr, argv[0]);
 683 }
 684
 685 U_BOOT_CMD(nboot, 4, 1, do_nandboot,
 686         "boot from NAND device",
 687         "[partition] | [[[loadAddr] dev] offset]"
 688 );
 689 #endif