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