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  * Ported 'dynenv' to 'nand env.oob' command
   8  * (C) 2010 Nanometrics, Inc.
   9  * 'dynenv' -- Dynamic environment offset in NAND OOB
  10  * (C) Copyright 2006-2007 OpenMoko, Inc.
  11  * Added 16-bit nand support
  12  * (C) 2004 Texas Instruments
  13  *
  14  * Copyright 2010, 2012 Freescale Semiconductor
  15  * The portions of this file whose copyright is held by Freescale and which
  16  * are not considered a derived work of GPL v2-only code may be distributed
  17  * and/or modified under the terms of the GNU General Public License as
  18  * published by the Free Software Foundation; either version 2 of the
  19  * License, or (at your option) any later version.
  20  */
  21
  22 #include <common.h>
  23 #include <linux/mtd/mtd.h>
  24 #include <command.h>
  25 #include <console.h>
  26 #include <env.h>
  27 #include <watchdog.h>
  28 #include <malloc.h>
  29 #include <asm/byteorder.h>
  30 #include <jffs2/jffs2.h>
  31 #include <nand.h>
  32
  33 #if defined(CONFIG_CMD_MTDPARTS)
  34
  35 /* partition handling routines */
  36 int mtdparts_init(void);
  37 int id_parse(const char *id, const char **ret_id, u8 *dev_type, u8 *dev_num);
  38 int find_dev_and_part(const char *id, struct mtd_device **dev,
  39                       u8 *part_num, struct part_info **part);
  40 #endif
  41
  42 static int nand_dump(struct mtd_info *mtd, ulong off, int only_oob,
  43                      int repeat)
  44 {
  45         int i;
  46         u_char *datbuf, *oobbuf, *p;
  47         static loff_t last;
  48         int ret = 0;
  49
  50         if (repeat)
  51                 off = last + mtd->writesize;
  52
  53         last = off;
  54
  55         datbuf = memalign(ARCH_DMA_MINALIGN, mtd->writesize);
  56         if (!datbuf) {
  57                 puts("No memory for page buffer\n");
  58                 return 1;
  59         }
  60
  61         oobbuf = memalign(ARCH_DMA_MINALIGN, mtd->oobsize);
  62         if (!oobbuf) {
  63                 puts("No memory for page buffer\n");
  64                 ret = 1;
  65                 goto free_dat;
  66         }
  67         off &= ~(mtd->writesize - 1);
  68         loff_t addr = (loff_t) off;
  69         struct mtd_oob_ops ops;
  70         memset(&ops, 0, sizeof(ops));
  71         ops.datbuf = datbuf;
  72         ops.oobbuf = oobbuf;
  73         ops.len = mtd->writesize;
  74         ops.ooblen = mtd->oobsize;
  75         ops.mode = MTD_OPS_RAW;
  76         i = mtd_read_oob(mtd, addr, &ops);
  77         if (i < 0) {
  78                 printf("Error (%d) reading page %08lx\n", i, off);
  79                 ret = 1;
  80                 goto free_all;
  81         }
  82         printf("Page %08lx dump:\n", off);
  83
  84         if (!only_oob) {
  85                 i = mtd->writesize >> 4;
  86                 p = datbuf;
  87
  88                 while (i--) {
  89                         printf("\t%02x %02x %02x %02x %02x %02x %02x %02x"
  90                                "  %02x %02x %02x %02x %02x %02x %02x %02x\n",
  91                                p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7],
  92                                p[8], p[9], p[10], p[11], p[12], p[13], p[14],
  93                                p[15]);
  94                         p += 16;
  95                 }
  96         }
  97
  98         puts("OOB:\n");
  99         i = mtd->oobsize >> 3;
 100         p = oobbuf;
 101         while (i--) {
 102                 printf("\t%02x %02x %02x %02x %02x %02x %02x %02x\n",
 103                        p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7]);
 104                 p += 8;
 105         }
 106
 107 free_all:
 108         free(oobbuf);
 109 free_dat:
 110         free(datbuf);
 111
 112         return ret;
 113 }
 114
 115 /* ------------------------------------------------------------------------- */
 116
 117 static int set_dev(int dev)
 118 {
 119         struct mtd_info *mtd = get_nand_dev_by_index(dev);
 120
 121         if (!mtd)
 122                 return -ENODEV;
 123
 124         if (nand_curr_device == dev)
 125                 return 0;
 126
 127         printf("Device %d: %s", dev, mtd->name);
 128         puts("... is now current device\n");
 129         nand_curr_device = dev;
 130
 131 #ifdef CONFIG_SYS_NAND_SELECT_DEVICE
 132         board_nand_select_device(mtd_to_nand(mtd), dev);
 133 #endif
 134
 135         return 0;
 136 }
 137
 138 #ifdef CONFIG_CMD_NAND_LOCK_UNLOCK
 139 static void print_status(ulong start, ulong end, ulong erasesize, int status)
 140 {
 141         /*
 142          * Micron NAND flash (e.g. MT29F4G08ABADAH4) BLOCK LOCK READ STATUS is
 143          * not the same as others.  Instead of bit 1 being lock, it is
 144          * #lock_tight. To make the driver support either format, ignore bit 1
 145          * and use only bit 0 and bit 2.
 146          */
 147         printf("%08lx - %08lx: %08lx blocks %s%s%s\n",
 148                 start,
 149                 end - 1,
 150                 (end - start) / erasesize,
 151                 ((status & NAND_LOCK_STATUS_TIGHT) ?  "TIGHT " : ""),
 152                 (!(status & NAND_LOCK_STATUS_UNLOCK) ?  "LOCK " : ""),
 153                 ((status & NAND_LOCK_STATUS_UNLOCK) ?  "UNLOCK " : ""));
 154 }
 155
 156 static void do_nand_status(struct mtd_info *mtd)
 157 {
 158         ulong block_start = 0;
 159         ulong off;
 160         int last_status = -1;
 161
 162         struct nand_chip *nand_chip = mtd_to_nand(mtd);
 163         /* check the WP bit */
 164         nand_chip->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1);
 165         printf("device is %swrite protected\n",
 166                 (nand_chip->read_byte(mtd) & 0x80 ?
 167                  "NOT " : ""));
 168
 169         for (off = 0; off < mtd->size; off += mtd->erasesize) {
 170                 int s = nand_get_lock_status(mtd, off);
 171
 172                 /* print message only if status has changed */
 173                 if (s != last_status && off != 0) {
 174                         print_status(block_start, off, mtd->erasesize,
 175                                         last_status);
 176                         block_start = off;
 177                 }
 178                 last_status = s;
 179         }
 180         /* Print the last block info */
 181         print_status(block_start, off, mtd->erasesize, last_status);
 182 }
 183 #endif
 184
 185 #ifdef CONFIG_ENV_OFFSET_OOB
 186 unsigned long nand_env_oob_offset;
 187
 188 int do_nand_env_oob(cmd_tbl_t *cmdtp, int argc, char *const argv[])
 189 {
 190         int ret;
 191         uint32_t oob_buf[ENV_OFFSET_SIZE/sizeof(uint32_t)];
 192         struct mtd_info *mtd = get_nand_dev_by_index(0);
 193         char *cmd = argv[1];
 194
 195         if (CONFIG_SYS_MAX_NAND_DEVICE == 0 || !mtd) {
 196                 puts("no devices available\n");
 197                 return 1;
 198         }
 199
 200         set_dev(0);
 201
 202         if (!strcmp(cmd, "get")) {
 203                 ret = get_nand_env_oob(mtd, &nand_env_oob_offset);
 204                 if (ret)
 205                         return 1;
 206
 207                 printf("0x%08lx\n", nand_env_oob_offset);
 208         } else if (!strcmp(cmd, "set")) {
 209                 loff_t addr;
 210                 loff_t maxsize;
 211                 struct mtd_oob_ops ops;
 212                 int idx = 0;
 213
 214                 if (argc < 3)
 215                         goto usage;
 216
 217                 mtd = get_nand_dev_by_index(idx);
 218                 /* We don't care about size, or maxsize. */
 219                 if (mtd_arg_off(argv[2], &idx, &addr, &maxsize, &maxsize,
 220                                 MTD_DEV_TYPE_NAND, mtd->size)) {
 221                         puts("Offset or partition name expected\n");
 222                         return 1;
 223                 }
 224                 if (set_dev(idx)) {
 225                         puts("Offset or partition name expected\n");
 226                         return 1;
 227                 }
 228
 229                 if (idx != 0) {
 230                         puts("Partition not on first NAND device\n");
 231                         return 1;
 232                 }
 233
 234                 if (mtd->oobavail < ENV_OFFSET_SIZE) {
 235                         printf("Insufficient available OOB bytes:\n"
 236                                "%d OOB bytes available but %d required for "
 237                                "env.oob support\n",
 238                                mtd->oobavail, ENV_OFFSET_SIZE);
 239                         return 1;
 240                 }
 241
 242                 if ((addr & (mtd->erasesize - 1)) != 0) {
 243                         printf("Environment offset must be block-aligned\n");
 244                         return 1;
 245                 }
 246
 247                 ops.datbuf = NULL;
 248                 ops.mode = MTD_OOB_AUTO;
 249                 ops.ooboffs = 0;
 250                 ops.ooblen = ENV_OFFSET_SIZE;
 251                 ops.oobbuf = (void *) oob_buf;
 252
 253                 oob_buf[0] = ENV_OOB_MARKER;
 254                 oob_buf[1] = addr / mtd->erasesize;
 255
 256                 ret = mtd->write_oob(mtd, ENV_OFFSET_SIZE, &ops);
 257                 if (ret) {
 258                         printf("Error writing OOB block 0\n");
 259                         return ret;
 260                 }
 261
 262                 ret = get_nand_env_oob(mtd, &nand_env_oob_offset);
 263                 if (ret) {
 264                         printf("Error reading env offset in OOB\n");
 265                         return ret;
 266                 }
 267
 268                 if (addr != nand_env_oob_offset) {
 269                         printf("Verification of env offset in OOB failed: "
 270                                "0x%08llx expected but got 0x%08lx\n",
 271                                (unsigned long long)addr, nand_env_oob_offset);
 272                         return 1;
 273                 }
 274         } else {
 275                 goto usage;
 276         }
 277
 278         return ret;
 279
 280 usage:
 281         return CMD_RET_USAGE;
 282 }
 283
 284 #endif
 285
 286 static void nand_print_and_set_info(int idx)
 287 {
 288         struct mtd_info *mtd;
 289         struct nand_chip *chip;
 290
 291         mtd = get_nand_dev_by_index(idx);
 292         if (!mtd)
 293                 return;
 294
 295         chip = mtd_to_nand(mtd);
 296         printf("Device %d: ", idx);
 297         if (chip->numchips > 1)
 298                 printf("%dx ", chip->numchips);
 299         printf("%s, sector size %u KiB\n",
 300                mtd->name, mtd->erasesize >> 10);
 301         printf("  Page size   %8d b\n", mtd->writesize);
 302         printf("  OOB size    %8d b\n", mtd->oobsize);
 303         printf("  Erase size  %8d b\n", mtd->erasesize);
 304         printf("  subpagesize %8d b\n", chip->subpagesize);
 305         printf("  options     0x%08x\n", chip->options);
 306         printf("  bbt options 0x%08x\n", chip->bbt_options);
 307
 308         /* Set geometry info */
 309         env_set_hex("nand_writesize", mtd->writesize);
 310         env_set_hex("nand_oobsize", mtd->oobsize);
 311         env_set_hex("nand_erasesize", mtd->erasesize);
 312 }
 313
 314 static int raw_access(struct mtd_info *mtd, ulong addr, loff_t off,
 315                       ulong count, int read, int no_verify)
 316 {
 317         int ret = 0;
 318
 319         while (count--) {
 320                 /* Raw access */
 321                 mtd_oob_ops_t ops = {
 322                         .datbuf = (u8 *)addr,
 323                         .oobbuf = ((u8 *)addr) + mtd->writesize,
 324                         .len = mtd->writesize,
 325                         .ooblen = mtd->oobsize,
 326                         .mode = MTD_OPS_RAW
 327                 };
 328
 329                 if (read) {
 330                         ret = mtd_read_oob(mtd, off, &ops);
 331                 } else {
 332                         ret = mtd_write_oob(mtd, off, &ops);
 333                         if (!ret && !no_verify)
 334                                 ret = nand_verify_page_oob(mtd, &ops, off);
 335                 }
 336
 337                 if (ret) {
 338                         printf("%s: error at offset %llx, ret %d\n",
 339                                 __func__, (long long)off, ret);
 340                         break;
 341                 }
 342
 343                 addr += mtd->writesize + mtd->oobsize;
 344                 off += mtd->writesize;
 345         }
 346
 347         return ret;
 348 }
 349
 350 /* Adjust a chip/partition size down for bad blocks so we don't
 351  * read/write past the end of a chip/partition by accident.
 352  */
 353 static void adjust_size_for_badblocks(loff_t *size, loff_t offset, int dev)
 354 {
 355         /* We grab the nand info object here fresh because this is usually
 356          * called after arg_off_size() which can change the value of dev.
 357          */
 358         struct mtd_info *mtd = get_nand_dev_by_index(dev);
 359         loff_t maxoffset = offset + *size;
 360         int badblocks = 0;
 361
 362         /* count badblocks in NAND from offset to offset + size */
 363         for (; offset < maxoffset; offset += mtd->erasesize) {
 364                 if (nand_block_isbad(mtd, offset))
 365                         badblocks++;
 366         }
 367         /* adjust size if any bad blocks found */
 368         if (badblocks) {
 369                 *size -= badblocks * mtd->erasesize;
 370                 printf("size adjusted to 0x%llx (%d bad blocks)\n",
 371                        (unsigned long long)*size, badblocks);
 372         }
 373 }
 374
 375 static int do_nand(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 376 {
 377         int i, ret = 0;
 378         ulong addr;
 379         loff_t off, size, maxsize;
 380         char *cmd, *s;
 381         struct mtd_info *mtd;
 382 #ifdef CONFIG_SYS_NAND_QUIET
 383         int quiet = CONFIG_SYS_NAND_QUIET;
 384 #else
 385         int quiet = 0;
 386 #endif
 387         const char *quiet_str = env_get("quiet");
 388         int dev = nand_curr_device;
 389         int repeat = flag & CMD_FLAG_REPEAT;
 390
 391         /* at least two arguments please */
 392         if (argc < 2)
 393                 goto usage;
 394
 395         if (quiet_str)
 396                 quiet = simple_strtoul(quiet_str, NULL, 0) != 0;
 397
 398         cmd = argv[1];
 399
 400         /* Only "dump" is repeatable. */
 401         if (repeat && strcmp(cmd, "dump"))
 402                 return 0;
 403
 404         if (strcmp(cmd, "info") == 0) {
 405
 406                 putc('\n');
 407                 for (i = 0; i < CONFIG_SYS_MAX_NAND_DEVICE; i++)
 408                         nand_print_and_set_info(i);
 409                 return 0;
 410         }
 411
 412         if (strcmp(cmd, "device") == 0) {
 413                 if (argc < 3) {
 414                         putc('\n');
 415                         if (dev < 0 || dev >= CONFIG_SYS_MAX_NAND_DEVICE)
 416                                 puts("no devices available\n");
 417                         else
 418                                 nand_print_and_set_info(dev);
 419                         return 0;
 420                 }
 421
 422                 dev = (int)simple_strtoul(argv[2], NULL, 10);
 423                 set_dev(dev);
 424
 425                 return 0;
 426         }
 427
 428 #ifdef CONFIG_ENV_OFFSET_OOB
 429         /* this command operates only on the first nand device */
 430         if (strcmp(cmd, "env.oob") == 0)
 431                 return do_nand_env_oob(cmdtp, argc - 1, argv + 1);
 432 #endif
 433
 434         /* The following commands operate on the current device, unless
 435          * overridden by a partition specifier.  Note that if somehow the
 436          * current device is invalid, it will have to be changed to a valid
 437          * one before these commands can run, even if a partition specifier
 438          * for another device is to be used.
 439          */
 440         mtd = get_nand_dev_by_index(dev);
 441         if (!mtd) {
 442                 puts("\nno devices available\n");
 443                 return 1;
 444         }
 445
 446         if (strcmp(cmd, "bad") == 0) {
 447                 printf("\nDevice %d bad blocks:\n", dev);
 448                 for (off = 0; off < mtd->size; off += mtd->erasesize)
 449                         if (nand_block_isbad(mtd, off))
 450                                 printf("  %08llx\n", (unsigned long long)off);
 451                 return 0;
 452         }
 453
 454         /*
 455          * Syntax is:
 456          *   0    1     2       3    4
 457          *   nand erase [clean] [off size]
 458          */
 459         if (strncmp(cmd, "erase", 5) == 0 || strncmp(cmd, "scrub", 5) == 0) {
 460                 nand_erase_options_t opts;
 461                 /* "clean" at index 2 means request to write cleanmarker */
 462                 int clean = argc > 2 && !strcmp("clean", argv[2]);
 463                 int scrub_yes = argc > 2 && !strcmp("-y", argv[2]);
 464                 int o = (clean || scrub_yes) ? 3 : 2;
 465                 int scrub = !strncmp(cmd, "scrub", 5);
 466                 int spread = 0;
 467                 int args = 2;
 468                 const char *scrub_warn =
 469                         "Warning: "
 470                         "scrub option will erase all factory set bad blocks!\n"
 471                         "         "
 472                         "There is no reliable way to recover them.\n"
 473                         "         "
 474                         "Use this command only for testing purposes if you\n"
 475                         "         "
 476                         "are sure of what you are doing!\n"
 477                         "\nReally scrub this NAND flash? <y/N>\n";
 478
 479                 if (cmd[5] != 0) {
 480                         if (!strcmp(&cmd[5], ".spread")) {
 481                                 spread = 1;
 482                         } else if (!strcmp(&cmd[5], ".part")) {
 483                                 args = 1;
 484                         } else if (!strcmp(&cmd[5], ".chip")) {
 485                                 args = 0;
 486                         } else {
 487                                 goto usage;
 488                         }
 489                 }
 490
 491                 /*
 492                  * Don't allow missing arguments to cause full chip/partition
 493                  * erases -- easy to do accidentally, e.g. with a misspelled
 494                  * variable name.
 495                  */
 496                 if (argc != o + args)
 497                         goto usage;
 498
 499                 printf("\nNAND %s: ", cmd);
 500                 /* skip first two or three arguments, look for offset and size */
 501                 if (mtd_arg_off_size(argc - o, argv + o, &dev, &off, &size,
 502                                      &maxsize, MTD_DEV_TYPE_NAND,
 503                                      mtd->size) != 0)
 504                         return 1;
 505
 506                 if (set_dev(dev))
 507                         return 1;
 508
 509                 mtd = get_nand_dev_by_index(dev);
 510
 511                 memset(&opts, 0, sizeof(opts));
 512                 opts.offset = off;
 513                 opts.length = size;
 514                 opts.jffs2  = clean;
 515                 opts.quiet  = quiet;
 516                 opts.spread = spread;
 517
 518                 if (scrub) {
 519                         if (scrub_yes) {
 520                                 opts.scrub = 1;
 521                         } else {
 522                                 puts(scrub_warn);
 523                                 if (confirm_yesno()) {
 524                                         opts.scrub = 1;
 525                                 } else {
 526                                         puts("scrub aborted\n");
 527                                         return 1;
 528                                 }
 529                         }
 530                 }
 531                 ret = nand_erase_opts(mtd, &opts);
 532                 printf("%s\n", ret ? "ERROR" : "OK");
 533
 534                 return ret == 0 ? 0 : 1;
 535         }
 536
 537         if (strncmp(cmd, "dump", 4) == 0) {
 538                 if (argc < 3)
 539                         goto usage;
 540
 541                 off = (int)simple_strtoul(argv[2], NULL, 16);
 542                 ret = nand_dump(mtd, off, !strcmp(&cmd[4], ".oob"), repeat);
 543
 544                 return ret == 0 ? 1 : 0;
 545         }
 546
 547         if (strncmp(cmd, "read", 4) == 0 || strncmp(cmd, "write", 5) == 0) {
 548                 size_t rwsize;
 549                 ulong pagecount = 1;
 550                 int read;
 551                 int raw = 0;
 552                 int no_verify = 0;
 553
 554                 if (argc < 4)
 555                         goto usage;
 556
 557                 addr = (ulong)simple_strtoul(argv[2], NULL, 16);
 558
 559                 read = strncmp(cmd, "read", 4) == 0; /* 1 = read, 0 = write */
 560                 printf("\nNAND %s: ", read ? "read" : "write");
 561
 562                 s = strchr(cmd, '.');
 563
 564                 if (s && !strncmp(s, ".raw", 4)) {
 565                         raw = 1;
 566
 567                         if (!strcmp(s, ".raw.noverify"))
 568                                 no_verify = 1;
 569
 570                         if (mtd_arg_off(argv[3], &dev, &off, &size, &maxsize,
 571                                         MTD_DEV_TYPE_NAND,
 572                                         mtd->size))
 573                                 return 1;
 574
 575                         if (set_dev(dev))
 576                                 return 1;
 577
 578                         mtd = get_nand_dev_by_index(dev);
 579
 580                         if (argc > 4 && !str2long(argv[4], &pagecount)) {
 581                                 printf("'%s' is not a number\n", argv[4]);
 582                                 return 1;
 583                         }
 584
 585                         if (pagecount * mtd->writesize > size) {
 586                                 puts("Size exceeds partition or device limit\n");
 587                                 return -1;
 588                         }
 589
 590                         rwsize = pagecount * (mtd->writesize + mtd->oobsize);
 591                 } else {
 592                         if (mtd_arg_off_size(argc - 3, argv + 3, &dev, &off,
 593                                              &size, &maxsize,
 594                                              MTD_DEV_TYPE_NAND,
 595                                              mtd->size) != 0)
 596                                 return 1;
 597
 598                         if (set_dev(dev))
 599                                 return 1;
 600
 601                         /* size is unspecified */
 602                         if (argc < 5)
 603                                 adjust_size_for_badblocks(&size, off, dev);
 604                         rwsize = size;
 605                 }
 606
 607                 mtd = get_nand_dev_by_index(dev);
 608
 609                 if (!s || !strcmp(s, ".jffs2") ||
 610                     !strcmp(s, ".e") || !strcmp(s, ".i")) {
 611                         if (read)
 612                                 ret = nand_read_skip_bad(mtd, off, &rwsize,
 613                                                          NULL, maxsize,
 614                                                          (u_char *)addr);
 615                         else
 616                                 ret = nand_write_skip_bad(mtd, off, &rwsize,
 617                                                           NULL, maxsize,
 618                                                           (u_char *)addr,
 619                                                           WITH_WR_VERIFY);
 620 #ifdef CONFIG_CMD_NAND_TRIMFFS
 621                 } else if (!strcmp(s, ".trimffs")) {
 622                         if (read) {
 623                                 printf("Unknown nand command suffix '%s'\n", s);
 624                                 return 1;
 625                         }
 626                         ret = nand_write_skip_bad(mtd, off, &rwsize, NULL,
 627                                                 maxsize, (u_char *)addr,
 628                                                 WITH_DROP_FFS | WITH_WR_VERIFY);
 629 #endif
 630                 } else if (!strcmp(s, ".oob")) {
 631                         /* out-of-band data */
 632                         mtd_oob_ops_t ops = {
 633                                 .oobbuf = (u8 *)addr,
 634                                 .ooblen = rwsize,
 635                                 .mode = MTD_OPS_RAW
 636                         };
 637
 638                         if (read)
 639                                 ret = mtd_read_oob(mtd, off, &ops);
 640                         else
 641                                 ret = mtd_write_oob(mtd, off, &ops);
 642                 } else if (raw) {
 643                         ret = raw_access(mtd, addr, off, pagecount, read,
 644                                          no_verify);
 645                 } else {
 646                         printf("Unknown nand command suffix '%s'.\n", s);
 647                         return 1;
 648                 }
 649
 650                 printf(" %zu bytes %s: %s\n", rwsize,
 651                        read ? "read" : "written", ret ? "ERROR" : "OK");
 652
 653                 return ret == 0 ? 0 : 1;
 654         }
 655
 656 #ifdef CONFIG_CMD_NAND_TORTURE
 657         if (strcmp(cmd, "torture") == 0) {
 658                 loff_t endoff;
 659                 unsigned int failed = 0, passed = 0;
 660
 661                 if (argc < 3)
 662                         goto usage;
 663
 664                 if (!str2off(argv[2], &off)) {
 665                         puts("Offset is not a valid number\n");
 666                         return 1;
 667                 }
 668
 669                 size = mtd->erasesize;
 670                 if (argc > 3) {
 671                         if (!str2off(argv[3], &size)) {
 672                                 puts("Size is not a valid number\n");
 673                                 return 1;
 674                         }
 675                 }
 676
 677                 endoff = off + size;
 678                 if (endoff > mtd->size) {
 679                         puts("Arguments beyond end of NAND\n");
 680                         return 1;
 681                 }
 682
 683                 off = round_down(off, mtd->erasesize);
 684                 endoff = round_up(endoff, mtd->erasesize);
 685                 size = endoff - off;
 686                 printf("\nNAND torture: device %d offset 0x%llx size 0x%llx (block size 0x%x)\n",
 687                        dev, off, size, mtd->erasesize);
 688                 while (off < endoff) {
 689                         ret = nand_torture(mtd, off);
 690                         if (ret) {
 691                                 failed++;
 692                                 printf("  block at 0x%llx failed\n", off);
 693                         } else {
 694                                 passed++;
 695                         }
 696                         off += mtd->erasesize;
 697                 }
 698                 printf(" Passed: %u, failed: %u\n", passed, failed);
 699                 return failed != 0;
 700         }
 701 #endif
 702
 703         if (strcmp(cmd, "markbad") == 0) {
 704                 argc -= 2;
 705                 argv += 2;
 706
 707                 if (argc <= 0)
 708                         goto usage;
 709
 710                 while (argc > 0) {
 711                         addr = simple_strtoul(*argv, NULL, 16);
 712
 713                         if (mtd_block_markbad(mtd, addr)) {
 714                                 printf("block 0x%08lx NOT marked "
 715                                         "as bad! ERROR %d\n",
 716                                         addr, ret);
 717                                 ret = 1;
 718                         } else {
 719                                 printf("block 0x%08lx successfully "
 720                                         "marked as bad\n",
 721                                         addr);
 722                         }
 723                         --argc;
 724                         ++argv;
 725                 }
 726                 return ret;
 727         }
 728
 729         if (strcmp(cmd, "biterr") == 0) {
 730                 /* todo */
 731                 return 1;
 732         }
 733
 734 #ifdef CONFIG_CMD_NAND_LOCK_UNLOCK
 735         if (strcmp(cmd, "lock") == 0) {
 736                 int tight = 0;
 737                 int status = 0;
 738                 if (argc == 3) {
 739                         if (!strcmp("tight", argv[2]))
 740                                 tight = 1;
 741                         if (!strcmp("status", argv[2]))
 742                                 status = 1;
 743                 }
 744                 if (status) {
 745                         do_nand_status(mtd);
 746                 } else {
 747                         if (!nand_lock(mtd, tight)) {
 748                                 puts("NAND flash successfully locked\n");
 749                         } else {
 750                                 puts("Error locking NAND flash\n");
 751                                 return 1;
 752                         }
 753                 }
 754                 return 0;
 755         }
 756
 757         if (strncmp(cmd, "unlock", 5) == 0) {
 758                 int allexcept = 0;
 759
 760                 s = strchr(cmd, '.');
 761
 762                 if (s && !strcmp(s, ".allexcept"))
 763                         allexcept = 1;
 764
 765                 if (mtd_arg_off_size(argc - 2, argv + 2, &dev, &off, &size,
 766                                      &maxsize, MTD_DEV_TYPE_NAND,
 767                                      mtd->size) < 0)
 768                         return 1;
 769
 770                 if (set_dev(dev))
 771                         return 1;
 772
 773                 mtd = get_nand_dev_by_index(dev);
 774
 775                 if (!nand_unlock(mtd, off, size, allexcept)) {
 776                         puts("NAND flash successfully unlocked\n");
 777                 } else {
 778                         puts("Error unlocking NAND flash, "
 779                              "write and erase will probably fail\n");
 780                         return 1;
 781                 }
 782                 return 0;
 783         }
 784 #endif
 785
 786 usage:
 787         return CMD_RET_USAGE;
 788 }
 789
 790 #ifdef CONFIG_SYS_LONGHELP
 791 static char nand_help_text[] =
 792         "info - show available NAND devices\n"
 793         "nand device [dev] - show or set current device\n"
 794         "nand read - addr off|partition size\n"
 795         "nand write - addr off|partition size\n"
 796         "    read/write 'size' bytes starting at offset 'off'\n"
 797         "    to/from memory address 'addr', skipping bad blocks.\n"
 798         "nand read.raw - addr off|partition [count]\n"
 799         "nand write.raw[.noverify] - addr off|partition [count]\n"
 800         "    Use read.raw/write.raw to avoid ECC and access the flash as-is.\n"
 801 #ifdef CONFIG_CMD_NAND_TRIMFFS
 802         "nand write.trimffs - addr off|partition size\n"
 803         "    write 'size' bytes starting at offset 'off' from memory address\n"
 804         "    'addr', skipping bad blocks and dropping any pages at the end\n"
 805         "    of eraseblocks that contain only 0xFF\n"
 806 #endif
 807         "nand erase[.spread] [clean] off size - erase 'size' bytes "
 808         "from offset 'off'\n"
 809         "    With '.spread', erase enough for given file size, otherwise,\n"
 810         "    'size' includes skipped bad blocks.\n"
 811         "nand erase.part [clean] partition - erase entire mtd partition'\n"
 812         "nand erase.chip [clean] - erase entire chip'\n"
 813         "nand bad - show bad blocks\n"
 814         "nand dump[.oob] off - dump page\n"
 815 #ifdef CONFIG_CMD_NAND_TORTURE
 816         "nand torture off - torture one block at offset\n"
 817         "nand torture off [size] - torture blocks from off to off+size\n"
 818 #endif
 819         "nand scrub [-y] off size | scrub.part partition | scrub.chip\n"
 820         "    really clean NAND erasing bad blocks (UNSAFE)\n"
 821         "nand markbad off [...] - mark bad block(s) at offset (UNSAFE)\n"
 822         "nand biterr off - make a bit error at offset (UNSAFE)"
 823 #ifdef CONFIG_CMD_NAND_LOCK_UNLOCK
 824         "\n"
 825         "nand lock [tight] [status]\n"
 826         "    bring nand to lock state or display locked pages\n"
 827         "nand unlock[.allexcept] [offset] [size] - unlock section"
 828 #endif
 829 #ifdef CONFIG_ENV_OFFSET_OOB
 830         "\n"
 831         "nand env.oob - environment offset in OOB of block 0 of"
 832         "    first device.\n"
 833         "nand env.oob set off|partition - set enviromnent offset\n"
 834         "nand env.oob get - get environment offset"
 835 #endif
 836         "";
 837 #endif
 838
 839 U_BOOT_CMD(
 840         nand, CONFIG_SYS_MAXARGS, 1, do_nand,
 841         "NAND sub-system", nand_help_text
 842 );
 843
 844 static int nand_load_image(cmd_tbl_t *cmdtp, struct mtd_info *mtd,
 845                            ulong offset, ulong addr, char *cmd)
 846 {
 847         int r;
 848         char *s;
 849         size_t cnt;
 850 #if defined(CONFIG_LEGACY_IMAGE_FORMAT)
 851         image_header_t *hdr;
 852 #endif
 853 #if defined(CONFIG_FIT)
 854         const void *fit_hdr = NULL;
 855 #endif
 856
 857         s = strchr(cmd, '.');
 858         if (s != NULL &&
 859             (strcmp(s, ".jffs2") && strcmp(s, ".e") && strcmp(s, ".i"))) {
 860                 printf("Unknown nand load suffix '%s'\n", s);
 861                 bootstage_error(BOOTSTAGE_ID_NAND_SUFFIX);
 862                 return 1;
 863         }
 864
 865         printf("\nLoading from %s, offset 0x%lx\n", mtd->name, offset);
 866
 867         cnt = mtd->writesize;
 868         r = nand_read_skip_bad(mtd, offset, &cnt, NULL, mtd->size,
 869                                (u_char *)addr);
 870         if (r) {
 871                 puts("** Read error\n");
 872                 bootstage_error(BOOTSTAGE_ID_NAND_HDR_READ);
 873                 return 1;
 874         }
 875         bootstage_mark(BOOTSTAGE_ID_NAND_HDR_READ);
 876
 877         switch (genimg_get_format ((void *)addr)) {
 878 #if defined(CONFIG_LEGACY_IMAGE_FORMAT)
 879         case IMAGE_FORMAT_LEGACY:
 880                 hdr = (image_header_t *)addr;
 881
 882                 bootstage_mark(BOOTSTAGE_ID_NAND_TYPE);
 883                 image_print_contents (hdr);
 884
 885                 cnt = image_get_image_size (hdr);
 886                 break;
 887 #endif
 888 #if defined(CONFIG_FIT)
 889         case IMAGE_FORMAT_FIT:
 890                 fit_hdr = (const void *)addr;
 891                 puts ("Fit image detected...\n");
 892
 893                 cnt = fit_get_size (fit_hdr);
 894                 break;
 895 #endif
 896         default:
 897                 bootstage_error(BOOTSTAGE_ID_NAND_TYPE);
 898                 puts ("** Unknown image type\n");
 899                 return 1;
 900         }
 901         bootstage_mark(BOOTSTAGE_ID_NAND_TYPE);
 902
 903         r = nand_read_skip_bad(mtd, offset, &cnt, NULL, mtd->size,
 904                                (u_char *)addr);
 905         if (r) {
 906                 puts("** Read error\n");
 907                 bootstage_error(BOOTSTAGE_ID_NAND_READ);
 908                 return 1;
 909         }
 910         bootstage_mark(BOOTSTAGE_ID_NAND_READ);
 911
 912 #if defined(CONFIG_FIT)
 913         /* This cannot be done earlier, we need complete FIT image in RAM first */
 914         if (genimg_get_format ((void *)addr) == IMAGE_FORMAT_FIT) {
 915                 if (!fit_check_format (fit_hdr)) {
 916                         bootstage_error(BOOTSTAGE_ID_NAND_FIT_READ);
 917                         puts ("** Bad FIT image format\n");
 918                         return 1;
 919                 }
 920                 bootstage_mark(BOOTSTAGE_ID_NAND_FIT_READ_OK);
 921                 fit_print_contents (fit_hdr);
 922         }
 923 #endif
 924
 925         /* Loading ok, update default load address */
 926
 927         load_addr = addr;
 928
 929         return bootm_maybe_autostart(cmdtp, cmd);
 930 }
 931
 932 static int do_nandboot(cmd_tbl_t *cmdtp, int flag, int argc,
 933                        char * const argv[])
 934 {
 935         char *boot_device = NULL;
 936         int idx;
 937         ulong addr, offset = 0;
 938         struct mtd_info *mtd;
 939 #if defined(CONFIG_CMD_MTDPARTS)
 940         struct mtd_device *dev;
 941         struct part_info *part;
 942         u8 pnum;
 943
 944         if (argc >= 2) {
 945                 char *p = (argc == 2) ? argv[1] : argv[2];
 946                 if (!(str2long(p, &addr)) && (mtdparts_init() == 0) &&
 947                     (find_dev_and_part(p, &dev, &pnum, &part) == 0)) {
 948                         if (dev->id->type != MTD_DEV_TYPE_NAND) {
 949                                 puts("Not a NAND device\n");
 950                                 return 1;
 951                         }
 952                         if (argc > 3)
 953                                 goto usage;
 954                         if (argc == 3)
 955                                 addr = simple_strtoul(argv[1], NULL, 16);
 956                         else
 957                                 addr = CONFIG_SYS_LOAD_ADDR;
 958
 959                         mtd = get_nand_dev_by_index(dev->id->num);
 960                         return nand_load_image(cmdtp, mtd, part->offset,
 961                                                addr, argv[0]);
 962                 }
 963         }
 964 #endif
 965
 966         bootstage_mark(BOOTSTAGE_ID_NAND_PART);
 967         switch (argc) {
 968         case 1:
 969                 addr = CONFIG_SYS_LOAD_ADDR;
 970                 boot_device = env_get("bootdevice");
 971                 break;
 972         case 2:
 973                 addr = simple_strtoul(argv[1], NULL, 16);
 974                 boot_device = env_get("bootdevice");
 975                 break;
 976         case 3:
 977                 addr = simple_strtoul(argv[1], NULL, 16);
 978                 boot_device = argv[2];
 979                 break;
 980         case 4:
 981                 addr = simple_strtoul(argv[1], NULL, 16);
 982                 boot_device = argv[2];
 983                 offset = simple_strtoul(argv[3], NULL, 16);
 984                 break;
 985         default:
 986 #if defined(CONFIG_CMD_MTDPARTS)
 987 usage:
 988 #endif
 989                 bootstage_error(BOOTSTAGE_ID_NAND_SUFFIX);
 990                 return CMD_RET_USAGE;
 991         }
 992         bootstage_mark(BOOTSTAGE_ID_NAND_SUFFIX);
 993
 994         if (!boot_device) {
 995                 puts("\n** No boot device **\n");
 996                 bootstage_error(BOOTSTAGE_ID_NAND_BOOT_DEVICE);
 997                 return 1;
 998         }
 999         bootstage_mark(BOOTSTAGE_ID_NAND_BOOT_DEVICE);
1000
1001         idx = simple_strtoul(boot_device, NULL, 16);
1002
1003         mtd = get_nand_dev_by_index(idx);
1004         if (!mtd) {
1005                 printf("\n** Device %d not available\n", idx);
1006                 bootstage_error(BOOTSTAGE_ID_NAND_AVAILABLE);
1007                 return 1;
1008         }
1009         bootstage_mark(BOOTSTAGE_ID_NAND_AVAILABLE);
1010
1011         return nand_load_image(cmdtp, mtd, offset, addr, argv[0]);
1012 }
1013
1014 U_BOOT_CMD(nboot, 4, 1, do_nandboot,
1015         "boot from NAND device",
1016         "[partition] | [[[loadAddr] dev] offset]"
1017 );