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 <bootstage.h>
  24 #include <image.h>
  25 #include <asm/cache.h>
  26 #include <linux/mtd/mtd.h>
  27 #include <command.h>
  28 #include <console.h>
  29 #include <env.h>
  30 #include <watchdog.h>
  31 #include <malloc.h>
  32 #include <asm/byteorder.h>
  33 #include <jffs2/jffs2.h>
  34 #include <nand.h>
  35
  36 #include "legacy-mtd-utils.h"
  37
  38 #if defined(CONFIG_CMD_MTDPARTS)
  39
  40 /* partition handling routines */
  41 int mtdparts_init(void);
  42 int find_dev_and_part(const char *id, struct mtd_device **dev,
  43                       u8 *part_num, struct part_info **part);
  44 #endif
  45
  46 static int nand_dump(struct mtd_info *mtd, ulong off, int only_oob,
  47                      int repeat)
  48 {
  49         int i;
  50         u_char *datbuf, *oobbuf, *p;
  51         static loff_t last;
  52         int ret = 0;
  53
  54         if (repeat)
  55                 off = last + mtd->writesize;
  56
  57         last = off;
  58
  59         datbuf = memalign(ARCH_DMA_MINALIGN, mtd->writesize);
  60         if (!datbuf) {
  61                 puts("No memory for page buffer\n");
  62                 return 1;
  63         }
  64
  65         oobbuf = memalign(ARCH_DMA_MINALIGN, mtd->oobsize);
  66         if (!oobbuf) {
  67                 puts("No memory for page buffer\n");
  68                 ret = 1;
  69                 goto free_dat;
  70         }
  71         off &= ~(mtd->writesize - 1);
  72         loff_t addr = (loff_t) off;
  73         struct mtd_oob_ops ops;
  74         memset(&ops, 0, sizeof(ops));
  75         ops.datbuf = datbuf;
  76         ops.oobbuf = oobbuf;
  77         ops.len = mtd->writesize;
  78         ops.ooblen = mtd->oobsize;
  79         ops.mode = MTD_OPS_RAW;
  80         i = mtd_read_oob(mtd, addr, &ops);
  81         if (i < 0) {
  82                 printf("Error (%d) reading page %08lx\n", i, off);
  83                 ret = 1;
  84                 goto free_all;
  85         }
  86         printf("Page %08lx dump:\n", off);
  87
  88         if (!only_oob) {
  89                 i = mtd->writesize >> 4;
  90                 p = datbuf;
  91
  92                 while (i--) {
  93                         printf("\t%02x %02x %02x %02x %02x %02x %02x %02x"
  94                                "  %02x %02x %02x %02x %02x %02x %02x %02x\n",
  95                                p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7],
  96                                p[8], p[9], p[10], p[11], p[12], p[13], p[14],
  97                                p[15]);
  98                         p += 16;
  99                 }
 100         }
 101
 102         puts("OOB:\n");
 103         i = mtd->oobsize >> 3;
 104         p = oobbuf;
 105         while (i--) {
 106                 printf("\t%02x %02x %02x %02x %02x %02x %02x %02x\n",
 107                        p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7]);
 108                 p += 8;
 109         }
 110
 111 free_all:
 112         free(oobbuf);
 113 free_dat:
 114         free(datbuf);
 115
 116         return ret;
 117 }
 118
 119 /* ------------------------------------------------------------------------- */
 120
 121 static int set_dev(int dev)
 122 {
 123         struct mtd_info *mtd = get_nand_dev_by_index(dev);
 124
 125         if (!mtd)
 126                 return -ENODEV;
 127
 128         if (nand_curr_device == dev)
 129                 return 0;
 130
 131         printf("Device %d: %s", dev, mtd->name);
 132         puts("... is now current device\n");
 133         nand_curr_device = dev;
 134
 135 #ifdef CONFIG_SYS_NAND_SELECT_DEVICE
 136         board_nand_select_device(mtd_to_nand(mtd), dev);
 137 #endif
 138
 139         return 0;
 140 }
 141
 142 #ifdef CONFIG_CMD_NAND_LOCK_UNLOCK
 143 static void print_status(ulong start, ulong end, ulong erasesize, int status)
 144 {
 145         /*
 146          * Micron NAND flash (e.g. MT29F4G08ABADAH4) BLOCK LOCK READ STATUS is
 147          * not the same as others.  Instead of bit 1 being lock, it is
 148          * #lock_tight. To make the driver support either format, ignore bit 1
 149          * and use only bit 0 and bit 2.
 150          */
 151         printf("%08lx - %08lx: %08lx blocks %s%s%s\n",
 152                 start,
 153                 end - 1,
 154                 (end - start) / erasesize,
 155                 ((status & NAND_LOCK_STATUS_TIGHT) ?  "TIGHT " : ""),
 156                 (!(status & NAND_LOCK_STATUS_UNLOCK) ?  "LOCK " : ""),
 157                 ((status & NAND_LOCK_STATUS_UNLOCK) ?  "UNLOCK " : ""));
 158 }
 159
 160 static void do_nand_status(struct mtd_info *mtd)
 161 {
 162         ulong block_start = 0;
 163         ulong off;
 164         int last_status = -1;
 165
 166         struct nand_chip *nand_chip = mtd_to_nand(mtd);
 167         /* check the WP bit */
 168         nand_chip->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1);
 169         printf("device is %swrite protected\n",
 170                 (nand_chip->read_byte(mtd) & 0x80 ?
 171                  "NOT " : ""));
 172
 173         for (off = 0; off < mtd->size; off += mtd->erasesize) {
 174                 int s = nand_get_lock_status(mtd, off);
 175
 176                 /* print message only if status has changed */
 177                 if (s != last_status && off != 0) {
 178                         print_status(block_start, off, mtd->erasesize,
 179                                         last_status);
 180                         block_start = off;
 181                 }
 182                 last_status = s;
 183         }
 184         /* Print the last block info */
 185         print_status(block_start, off, mtd->erasesize, last_status);
 186 }
 187 #endif
 188
 189 #ifdef CONFIG_ENV_OFFSET_OOB
 190 unsigned long nand_env_oob_offset;
 191
 192 int do_nand_env_oob(struct cmd_tbl *cmdtp, int argc, char *const argv[])
 193 {
 194         int ret;
 195         uint32_t oob_buf[ENV_OFFSET_SIZE/sizeof(uint32_t)];
 196         struct mtd_info *mtd = get_nand_dev_by_index(0);
 197         char *cmd = argv[1];
 198
 199         if (CONFIG_SYS_MAX_NAND_DEVICE == 0 || !mtd) {
 200                 puts("no devices available\n");
 201                 return 1;
 202         }
 203
 204         set_dev(0);
 205
 206         if (!strcmp(cmd, "get")) {
 207                 ret = get_nand_env_oob(mtd, &nand_env_oob_offset);
 208                 if (ret)
 209                         return 1;
 210
 211                 printf("0x%08lx\n", nand_env_oob_offset);
 212         } else if (!strcmp(cmd, "set")) {
 213                 loff_t addr;
 214                 loff_t maxsize;
 215                 struct mtd_oob_ops ops;
 216                 int idx = 0;
 217
 218                 if (argc < 3)
 219                         goto usage;
 220
 221                 mtd = get_nand_dev_by_index(idx);
 222                 /* We don't care about size, or maxsize. */
 223                 if (mtd_arg_off(argv[2], &idx, &addr, &maxsize, &maxsize,
 224                                 MTD_DEV_TYPE_NAND, mtd->size)) {
 225                         puts("Offset or partition name expected\n");
 226                         return 1;
 227                 }
 228                 if (set_dev(idx)) {
 229                         puts("Offset or partition name expected\n");
 230                         return 1;
 231                 }
 232
 233                 if (idx != 0) {
 234                         puts("Partition not on first NAND device\n");
 235                         return 1;
 236                 }
 237
 238                 if (mtd->oobavail < ENV_OFFSET_SIZE) {
 239                         printf("Insufficient available OOB bytes:\n"
 240                                "%d OOB bytes available but %d required for "
 241                                "env.oob support\n",
 242                                mtd->oobavail, ENV_OFFSET_SIZE);
 243                         return 1;
 244                 }
 245
 246                 if ((addr & (mtd->erasesize - 1)) != 0) {
 247                         printf("Environment offset must be block-aligned\n");
 248                         return 1;
 249                 }
 250
 251                 ops.datbuf = NULL;
 252                 ops.mode = MTD_OOB_AUTO;
 253                 ops.ooboffs = 0;
 254                 ops.ooblen = ENV_OFFSET_SIZE;
 255                 ops.oobbuf = (void *) oob_buf;
 256
 257                 oob_buf[0] = ENV_OOB_MARKER;
 258                 oob_buf[1] = addr / mtd->erasesize;
 259
 260                 ret = mtd->write_oob(mtd, ENV_OFFSET_SIZE, &ops);
 261                 if (ret) {
 262                         printf("Error writing OOB block 0\n");
 263                         return ret;
 264                 }
 265
 266                 ret = get_nand_env_oob(mtd, &nand_env_oob_offset);
 267                 if (ret) {
 268                         printf("Error reading env offset in OOB\n");
 269                         return ret;
 270                 }
 271
 272                 if (addr != nand_env_oob_offset) {
 273                         printf("Verification of env offset in OOB failed: "
 274                                "0x%08llx expected but got 0x%08lx\n",
 275                                (unsigned long long)addr, nand_env_oob_offset);
 276                         return 1;
 277                 }
 278         } else {
 279                 goto usage;
 280         }
 281
 282         return ret;
 283
 284 usage:
 285         return CMD_RET_USAGE;
 286 }
 287
 288 #endif
 289
 290 static void nand_print_and_set_info(int idx)
 291 {
 292         struct mtd_info *mtd;
 293         struct nand_chip *chip;
 294
 295         mtd = get_nand_dev_by_index(idx);
 296         if (!mtd)
 297                 return;
 298
 299         chip = mtd_to_nand(mtd);
 300         printf("Device %d: ", idx);
 301         if (chip->numchips > 1)
 302                 printf("%dx ", chip->numchips);
 303         printf("%s, sector size %u KiB\n",
 304                mtd->name, mtd->erasesize >> 10);
 305         printf("  Page size   %8d b\n", mtd->writesize);
 306         printf("  OOB size    %8d b\n", mtd->oobsize);
 307         printf("  Erase size  %8d b\n", mtd->erasesize);
 308         printf("  subpagesize %8d b\n", chip->subpagesize);
 309         printf("  options     0x%08x\n", chip->options);
 310         printf("  bbt options 0x%08x\n", chip->bbt_options);
 311
 312         /* Set geometry info */
 313         env_set_hex("nand_writesize", mtd->writesize);
 314         env_set_hex("nand_oobsize", mtd->oobsize);
 315         env_set_hex("nand_erasesize", mtd->erasesize);
 316 }
 317
 318 static int raw_access(struct mtd_info *mtd, ulong addr, loff_t off,
 319                       ulong count, int read, int no_verify)
 320 {
 321         int ret = 0;
 322
 323         while (count--) {
 324                 /* Raw access */
 325                 mtd_oob_ops_t ops = {
 326                         .datbuf = (u8 *)addr,
 327                         .oobbuf = ((u8 *)addr) + mtd->writesize,
 328                         .len = mtd->writesize,
 329                         .ooblen = mtd->oobsize,
 330                         .mode = MTD_OPS_RAW
 331                 };
 332
 333                 if (read) {
 334                         ret = mtd_read_oob(mtd, off, &ops);
 335                 } else {
 336                         ret = mtd_write_oob(mtd, off, &ops);
 337                         if (!ret && !no_verify)
 338                                 ret = nand_verify_page_oob(mtd, &ops, off);
 339                 }
 340
 341                 if (ret) {
 342                         printf("%s: error at offset %llx, ret %d\n",
 343                                 __func__, (long long)off, ret);
 344                         break;
 345                 }
 346
 347                 addr += mtd->writesize + mtd->oobsize;
 348                 off += mtd->writesize;
 349         }
 350
 351         return ret;
 352 }
 353
 354 /* Adjust a chip/partition size down for bad blocks so we don't
 355  * read/write past the end of a chip/partition by accident.
 356  */
 357 static void adjust_size_for_badblocks(loff_t *size, loff_t offset, int dev)
 358 {
 359         /* We grab the nand info object here fresh because this is usually
 360          * called after arg_off_size() which can change the value of dev.
 361          */
 362         struct mtd_info *mtd = get_nand_dev_by_index(dev);
 363         loff_t maxoffset = offset + *size;
 364         int badblocks = 0;
 365
 366         /* count badblocks in NAND from offset to offset + size */
 367         for (; offset < maxoffset; offset += mtd->erasesize) {
 368                 if (nand_block_isbad(mtd, offset))
 369                         badblocks++;
 370         }
 371         /* adjust size if any bad blocks found */
 372         if (badblocks) {
 373                 *size -= badblocks * mtd->erasesize;
 374                 printf("size adjusted to 0x%llx (%d bad blocks)\n",
 375                        (unsigned long long)*size, badblocks);
 376         }
 377 }
 378
 379 static int do_nand(struct cmd_tbl *cmdtp, int flag, int argc,
 380                    char *const argv[])
 381 {
 382         int i, ret = 0;
 383         ulong addr;
 384         loff_t off, size, maxsize;
 385         char *cmd, *s;
 386         struct mtd_info *mtd;
 387 #ifdef CONFIG_SYS_NAND_QUIET
 388         int quiet = CONFIG_SYS_NAND_QUIET;
 389 #else
 390         int quiet = 0;
 391 #endif
 392         const char *quiet_str = env_get("quiet");
 393         int dev = nand_curr_device;
 394         int repeat = flag & CMD_FLAG_REPEAT;
 395
 396         /* at least two arguments please */
 397         if (argc < 2)
 398                 goto usage;
 399
 400         if (quiet_str)
 401                 quiet = simple_strtoul(quiet_str, NULL, 0) != 0;
 402
 403         cmd = argv[1];
 404
 405         /* Only "dump" is repeatable. */
 406         if (repeat && strcmp(cmd, "dump"))
 407                 return 0;
 408
 409         if (strcmp(cmd, "info") == 0) {
 410
 411                 putc('\n');
 412                 for (i = 0; i < CONFIG_SYS_MAX_NAND_DEVICE; i++)
 413                         nand_print_and_set_info(i);
 414                 return 0;
 415         }
 416
 417         if (strcmp(cmd, "device") == 0) {
 418                 if (argc < 3) {
 419                         putc('\n');
 420                         if (dev < 0 || dev >= CONFIG_SYS_MAX_NAND_DEVICE)
 421                                 puts("no devices available\n");
 422                         else
 423                                 nand_print_and_set_info(dev);
 424                         return 0;
 425                 }
 426
 427                 dev = (int)simple_strtoul(argv[2], NULL, 10);
 428                 set_dev(dev);
 429
 430                 return 0;
 431         }
 432
 433 #ifdef CONFIG_ENV_OFFSET_OOB
 434         /* this command operates only on the first nand device */
 435         if (strcmp(cmd, "env.oob") == 0)
 436                 return do_nand_env_oob(cmdtp, argc - 1, argv + 1);
 437 #endif
 438
 439         /* The following commands operate on the current device, unless
 440          * overridden by a partition specifier.  Note that if somehow the
 441          * current device is invalid, it will have to be changed to a valid
 442          * one before these commands can run, even if a partition specifier
 443          * for another device is to be used.
 444          */
 445         mtd = get_nand_dev_by_index(dev);
 446         if (!mtd) {
 447                 puts("\nno devices available\n");
 448                 return 1;
 449         }
 450
 451         if (strcmp(cmd, "bad") == 0) {
 452                 printf("\nDevice %d bad blocks:\n", dev);
 453                 for (off = 0; off < mtd->size; off += mtd->erasesize)
 454                         if (nand_block_isbad(mtd, off))
 455                                 printf("  %08llx\n", (unsigned long long)off);
 456                 return 0;
 457         }
 458
 459         /*
 460          * Syntax is:
 461          *   0    1     2       3    4
 462          *   nand erase [clean] [off size]
 463          */
 464         if (strncmp(cmd, "erase", 5) == 0 || strncmp(cmd, "scrub", 5) == 0) {
 465                 nand_erase_options_t opts;
 466                 /* "clean" at index 2 means request to write cleanmarker */
 467                 int clean = argc > 2 && !strcmp("clean", argv[2]);
 468                 int scrub_yes = argc > 2 && !strcmp("-y", argv[2]);
 469                 int o = (clean || scrub_yes) ? 3 : 2;
 470                 int scrub = !strncmp(cmd, "scrub", 5);
 471                 int spread = 0;
 472                 int args = 2;
 473                 const char *scrub_warn =
 474                         "Warning: "
 475                         "scrub option will erase all factory set bad blocks!\n"
 476                         "         "
 477                         "There is no reliable way to recover them.\n"
 478                         "         "
 479                         "Use this command only for testing purposes if you\n"
 480                         "         "
 481                         "are sure of what you are doing!\n"
 482                         "\nReally scrub this NAND flash? <y/N>\n";
 483
 484                 if (cmd[5] != 0) {
 485                         if (!strcmp(&cmd[5], ".spread")) {
 486                                 spread = 1;
 487                         } else if (!strcmp(&cmd[5], ".part")) {
 488                                 args = 1;
 489                         } else if (!strcmp(&cmd[5], ".chip")) {
 490                                 args = 0;
 491                         } else {
 492                                 goto usage;
 493                         }
 494                 }
 495
 496                 /*
 497                  * Don't allow missing arguments to cause full chip/partition
 498                  * erases -- easy to do accidentally, e.g. with a misspelled
 499                  * variable name.
 500                  */
 501                 if (argc != o + args)
 502                         goto usage;
 503
 504                 printf("\nNAND %s: ", cmd);
 505                 /* skip first two or three arguments, look for offset and size */
 506                 if (mtd_arg_off_size(argc - o, argv + o, &dev, &off, &size,
 507                                      &maxsize, MTD_DEV_TYPE_NAND,
 508                                      mtd->size) != 0)
 509                         return 1;
 510
 511                 if (set_dev(dev))
 512                         return 1;
 513
 514                 mtd = get_nand_dev_by_index(dev);
 515
 516                 memset(&opts, 0, sizeof(opts));
 517                 opts.offset = off;
 518                 opts.length = size;
 519                 opts.jffs2  = clean;
 520                 opts.quiet  = quiet;
 521                 opts.spread = spread;
 522
 523                 if (scrub) {
 524                         if (scrub_yes) {
 525                                 opts.scrub = 1;
 526                         } else {
 527                                 puts(scrub_warn);
 528                                 if (confirm_yesno()) {
 529                                         opts.scrub = 1;
 530                                 } else {
 531                                         puts("scrub aborted\n");
 532                                         return 1;
 533                                 }
 534                         }
 535                 }
 536                 ret = nand_erase_opts(mtd, &opts);
 537                 printf("%s\n", ret ? "ERROR" : "OK");
 538
 539                 return ret == 0 ? 0 : 1;
 540         }
 541
 542         if (strncmp(cmd, "dump", 4) == 0) {
 543                 if (argc < 3)
 544                         goto usage;
 545
 546                 off = (int)simple_strtoul(argv[2], NULL, 16);
 547                 ret = nand_dump(mtd, off, !strcmp(&cmd[4], ".oob"), repeat);
 548
 549                 return ret == 0 ? 1 : 0;
 550         }
 551
 552         if (strncmp(cmd, "read", 4) == 0 || strncmp(cmd, "write", 5) == 0) {
 553                 size_t rwsize;
 554                 ulong pagecount = 1;
 555                 int read;
 556                 int raw = 0;
 557                 int no_verify = 0;
 558
 559                 if (argc < 4)
 560                         goto usage;
 561
 562                 addr = (ulong)simple_strtoul(argv[2], NULL, 16);
 563
 564                 read = strncmp(cmd, "read", 4) == 0; /* 1 = read, 0 = write */
 565                 printf("\nNAND %s: ", read ? "read" : "write");
 566
 567                 s = strchr(cmd, '.');
 568
 569                 if (s && !strncmp(s, ".raw", 4)) {
 570                         raw = 1;
 571
 572                         if (!strcmp(s, ".raw.noverify"))
 573                                 no_verify = 1;
 574
 575                         if (mtd_arg_off(argv[3], &dev, &off, &size, &maxsize,
 576                                         MTD_DEV_TYPE_NAND,
 577                                         mtd->size))
 578                                 return 1;
 579
 580                         if (set_dev(dev))
 581                                 return 1;
 582
 583                         mtd = get_nand_dev_by_index(dev);
 584
 585                         if (argc > 4 && !str2long(argv[4], &pagecount)) {
 586                                 printf("'%s' is not a number\n", argv[4]);
 587                                 return 1;
 588                         }
 589
 590                         if (pagecount * mtd->writesize > size) {
 591                                 puts("Size exceeds partition or device limit\n");
 592                                 return -1;
 593                         }
 594
 595                         rwsize = pagecount * (mtd->writesize + mtd->oobsize);
 596                 } else {
 597                         if (mtd_arg_off_size(argc - 3, argv + 3, &dev, &off,
 598                                              &size, &maxsize,
 599                                              MTD_DEV_TYPE_NAND,
 600                                              mtd->size) != 0)
 601                                 return 1;
 602
 603                         if (set_dev(dev))
 604                                 return 1;
 605
 606                         /* size is unspecified */
 607                         if (argc < 5)
 608                                 adjust_size_for_badblocks(&size, off, dev);
 609                         rwsize = size;
 610                 }
 611
 612                 mtd = get_nand_dev_by_index(dev);
 613
 614                 if (!s || !strcmp(s, ".jffs2") ||
 615                     !strcmp(s, ".e") || !strcmp(s, ".i")) {
 616                         if (read)
 617                                 ret = nand_read_skip_bad(mtd, off, &rwsize,
 618                                                          NULL, maxsize,
 619                                                          (u_char *)addr);
 620                         else
 621                                 ret = nand_write_skip_bad(mtd, off, &rwsize,
 622                                                           NULL, maxsize,
 623                                                           (u_char *)addr,
 624                                                           WITH_WR_VERIFY);
 625 #ifdef CONFIG_CMD_NAND_TRIMFFS
 626                 } else if (!strcmp(s, ".trimffs")) {
 627                         if (read) {
 628                                 printf("Unknown nand command suffix '%s'\n", s);
 629                                 return 1;
 630                         }
 631                         ret = nand_write_skip_bad(mtd, off, &rwsize, NULL,
 632                                                 maxsize, (u_char *)addr,
 633                                                 WITH_DROP_FFS | WITH_WR_VERIFY);
 634 #endif
 635                 } else if (!strcmp(s, ".oob")) {
 636                         /* out-of-band data */
 637                         mtd_oob_ops_t ops = {
 638                                 .oobbuf = (u8 *)addr,
 639                                 .ooblen = rwsize,
 640                                 .mode = MTD_OPS_RAW
 641                         };
 642
 643                         if (read)
 644                                 ret = mtd_read_oob(mtd, off, &ops);
 645                         else
 646                                 ret = mtd_write_oob(mtd, off, &ops);
 647                 } else if (raw) {
 648                         ret = raw_access(mtd, addr, off, pagecount, read,
 649                                          no_verify);
 650                 } else {
 651                         printf("Unknown nand command suffix '%s'.\n", s);
 652                         return 1;
 653                 }
 654
 655                 printf(" %zu bytes %s: %s\n", rwsize,
 656                        read ? "read" : "written", ret ? "ERROR" : "OK");
 657
 658                 return ret == 0 ? 0 : 1;
 659         }
 660
 661 #ifdef CONFIG_CMD_NAND_TORTURE
 662         if (strcmp(cmd, "torture") == 0) {
 663                 loff_t endoff;
 664                 unsigned int failed = 0, passed = 0;
 665
 666                 if (argc < 3)
 667                         goto usage;
 668
 669                 if (!str2off(argv[2], &off)) {
 670                         puts("Offset is not a valid number\n");
 671                         return 1;
 672                 }
 673
 674                 size = mtd->erasesize;
 675                 if (argc > 3) {
 676                         if (!str2off(argv[3], &size)) {
 677                                 puts("Size is not a valid number\n");
 678                                 return 1;
 679                         }
 680                 }
 681
 682                 endoff = off + size;
 683                 if (endoff > mtd->size) {
 684                         puts("Arguments beyond end of NAND\n");
 685                         return 1;
 686                 }
 687
 688                 off = round_down(off, mtd->erasesize);
 689                 endoff = round_up(endoff, mtd->erasesize);
 690                 size = endoff - off;
 691                 printf("\nNAND torture: device %d offset 0x%llx size 0x%llx (block size 0x%x)\n",
 692                        dev, off, size, mtd->erasesize);
 693                 while (off < endoff) {
 694                         ret = nand_torture(mtd, off);
 695                         if (ret) {
 696                                 failed++;
 697                                 printf("  block at 0x%llx failed\n", off);
 698                         } else {
 699                                 passed++;
 700                         }
 701                         off += mtd->erasesize;
 702                 }
 703                 printf(" Passed: %u, failed: %u\n", passed, failed);
 704                 return failed != 0;
 705         }
 706 #endif
 707
 708         if (strcmp(cmd, "markbad") == 0) {
 709                 argc -= 2;
 710                 argv += 2;
 711
 712                 if (argc <= 0)
 713                         goto usage;
 714
 715                 while (argc > 0) {
 716                         addr = simple_strtoul(*argv, NULL, 16);
 717
 718                         if (mtd_block_markbad(mtd, addr)) {
 719                                 printf("block 0x%08lx NOT marked "
 720                                         "as bad! ERROR %d\n",
 721                                         addr, ret);
 722                                 ret = 1;
 723                         } else {
 724                                 printf("block 0x%08lx successfully "
 725                                         "marked as bad\n",
 726                                         addr);
 727                         }
 728                         --argc;
 729                         ++argv;
 730                 }
 731                 return ret;
 732         }
 733
 734         if (strcmp(cmd, "biterr") == 0) {
 735                 /* todo */
 736                 return 1;
 737         }
 738
 739 #ifdef CONFIG_CMD_NAND_LOCK_UNLOCK
 740         if (strcmp(cmd, "lock") == 0) {
 741                 int tight = 0;
 742                 int status = 0;
 743                 if (argc == 3) {
 744                         if (!strcmp("tight", argv[2]))
 745                                 tight = 1;
 746                         if (!strcmp("status", argv[2]))
 747                                 status = 1;
 748                 }
 749                 if (status) {
 750                         do_nand_status(mtd);
 751                 } else {
 752                         if (!nand_lock(mtd, tight)) {
 753                                 puts("NAND flash successfully locked\n");
 754                         } else {
 755                                 puts("Error locking NAND flash\n");
 756                                 return 1;
 757                         }
 758                 }
 759                 return 0;
 760         }
 761
 762         if (strncmp(cmd, "unlock", 5) == 0) {
 763                 int allexcept = 0;
 764
 765                 s = strchr(cmd, '.');
 766
 767                 if (s && !strcmp(s, ".allexcept"))
 768                         allexcept = 1;
 769
 770                 if (mtd_arg_off_size(argc - 2, argv + 2, &dev, &off, &size,
 771                                      &maxsize, MTD_DEV_TYPE_NAND,
 772                                      mtd->size) < 0)
 773                         return 1;
 774
 775                 if (set_dev(dev))
 776                         return 1;
 777
 778                 mtd = get_nand_dev_by_index(dev);
 779
 780                 if (!nand_unlock(mtd, off, size, allexcept)) {
 781                         puts("NAND flash successfully unlocked\n");
 782                 } else {
 783                         puts("Error unlocking NAND flash, "
 784                              "write and erase will probably fail\n");
 785                         return 1;
 786                 }
 787                 return 0;
 788         }
 789 #endif
 790
 791 usage:
 792         return CMD_RET_USAGE;
 793 }
 794
 795 #ifdef CONFIG_SYS_LONGHELP
 796 static char nand_help_text[] =
 797         "info - show available NAND devices\n"
 798         "nand device [dev] - show or set current device\n"
 799         "nand read - addr off|partition size\n"
 800         "nand write - addr off|partition size\n"
 801         "    read/write 'size' bytes starting at offset 'off'\n"
 802         "    to/from memory address 'addr', skipping bad blocks.\n"
 803         "nand read.raw - addr off|partition [count]\n"
 804         "nand write.raw[.noverify] - addr off|partition [count]\n"
 805         "    Use read.raw/write.raw to avoid ECC and access the flash as-is.\n"
 806 #ifdef CONFIG_CMD_NAND_TRIMFFS
 807         "nand write.trimffs - addr off|partition size\n"
 808         "    write 'size' bytes starting at offset 'off' from memory address\n"
 809         "    'addr', skipping bad blocks and dropping any pages at the end\n"
 810         "    of eraseblocks that contain only 0xFF\n"
 811 #endif
 812         "nand erase[.spread] [clean] off size - erase 'size' bytes "
 813         "from offset 'off'\n"
 814         "    With '.spread', erase enough for given file size, otherwise,\n"
 815         "    'size' includes skipped bad blocks.\n"
 816         "nand erase.part [clean] partition - erase entire mtd partition'\n"
 817         "nand erase.chip [clean] - erase entire chip'\n"
 818         "nand bad - show bad blocks\n"
 819         "nand dump[.oob] off - dump page\n"
 820 #ifdef CONFIG_CMD_NAND_TORTURE
 821         "nand torture off - torture one block at offset\n"
 822         "nand torture off [size] - torture blocks from off to off+size\n"
 823 #endif
 824         "nand scrub [-y] off size | scrub.part partition | scrub.chip\n"
 825         "    really clean NAND erasing bad blocks (UNSAFE)\n"
 826         "nand markbad off [...] - mark bad block(s) at offset (UNSAFE)\n"
 827         "nand biterr off - make a bit error at offset (UNSAFE)"
 828 #ifdef CONFIG_CMD_NAND_LOCK_UNLOCK
 829         "\n"
 830         "nand lock [tight] [status]\n"
 831         "    bring nand to lock state or display locked pages\n"
 832         "nand unlock[.allexcept] [offset] [size] - unlock section"
 833 #endif
 834 #ifdef CONFIG_ENV_OFFSET_OOB
 835         "\n"
 836         "nand env.oob - environment offset in OOB of block 0 of"
 837         "    first device.\n"
 838         "nand env.oob set off|partition - set enviromnent offset\n"
 839         "nand env.oob get - get environment offset"
 840 #endif
 841         "";
 842 #endif
 843
 844 U_BOOT_CMD(
 845         nand, CONFIG_SYS_MAXARGS, 1, do_nand,
 846         "NAND sub-system", nand_help_text
 847 );
 848
 849 static int nand_load_image(struct cmd_tbl *cmdtp, struct mtd_info *mtd,
 850                            ulong offset, ulong addr, char *cmd)
 851 {
 852         int r;
 853         char *s;
 854         size_t cnt;
 855 #if defined(CONFIG_LEGACY_IMAGE_FORMAT)
 856         image_header_t *hdr;
 857 #endif
 858 #if defined(CONFIG_FIT)
 859         const void *fit_hdr = NULL;
 860 #endif
 861
 862         s = strchr(cmd, '.');
 863         if (s != NULL &&
 864             (strcmp(s, ".jffs2") && strcmp(s, ".e") && strcmp(s, ".i"))) {
 865                 printf("Unknown nand load suffix '%s'\n", s);
 866                 bootstage_error(BOOTSTAGE_ID_NAND_SUFFIX);
 867                 return 1;
 868         }
 869
 870         printf("\nLoading from %s, offset 0x%lx\n", mtd->name, offset);
 871
 872         cnt = mtd->writesize;
 873         r = nand_read_skip_bad(mtd, offset, &cnt, NULL, mtd->size,
 874                                (u_char *)addr);
 875         if (r) {
 876                 puts("** Read error\n");
 877                 bootstage_error(BOOTSTAGE_ID_NAND_HDR_READ);
 878                 return 1;
 879         }
 880         bootstage_mark(BOOTSTAGE_ID_NAND_HDR_READ);
 881
 882         switch (genimg_get_format ((void *)addr)) {
 883 #if defined(CONFIG_LEGACY_IMAGE_FORMAT)
 884         case IMAGE_FORMAT_LEGACY:
 885                 hdr = (image_header_t *)addr;
 886
 887                 bootstage_mark(BOOTSTAGE_ID_NAND_TYPE);
 888                 image_print_contents (hdr);
 889
 890                 cnt = image_get_image_size (hdr);
 891                 break;
 892 #endif
 893 #if defined(CONFIG_FIT)
 894         case IMAGE_FORMAT_FIT:
 895                 fit_hdr = (const void *)addr;
 896                 puts ("Fit image detected...\n");
 897
 898                 cnt = fit_get_size (fit_hdr);
 899                 break;
 900 #endif
 901         default:
 902                 bootstage_error(BOOTSTAGE_ID_NAND_TYPE);
 903                 puts ("** Unknown image type\n");
 904                 return 1;
 905         }
 906         bootstage_mark(BOOTSTAGE_ID_NAND_TYPE);
 907
 908         r = nand_read_skip_bad(mtd, offset, &cnt, NULL, mtd->size,
 909                                (u_char *)addr);
 910         if (r) {
 911                 puts("** Read error\n");
 912                 bootstage_error(BOOTSTAGE_ID_NAND_READ);
 913                 return 1;
 914         }
 915         bootstage_mark(BOOTSTAGE_ID_NAND_READ);
 916
 917 #if defined(CONFIG_FIT)
 918         /* This cannot be done earlier, we need complete FIT image in RAM first */
 919         if (genimg_get_format ((void *)addr) == IMAGE_FORMAT_FIT) {
 920                 if (!fit_check_format (fit_hdr)) {
 921                         bootstage_error(BOOTSTAGE_ID_NAND_FIT_READ);
 922                         puts ("** Bad FIT image format\n");
 923                         return 1;
 924                 }
 925                 bootstage_mark(BOOTSTAGE_ID_NAND_FIT_READ_OK);
 926                 fit_print_contents (fit_hdr);
 927         }
 928 #endif
 929
 930         /* Loading ok, update default load address */
 931
 932         image_load_addr = addr;
 933
 934         return bootm_maybe_autostart(cmdtp, cmd);
 935 }
 936
 937 static int do_nandboot(struct cmd_tbl *cmdtp, int flag, int argc,
 938                        char *const argv[])
 939 {
 940         char *boot_device = NULL;
 941         int idx;
 942         ulong addr, offset = 0;
 943         struct mtd_info *mtd;
 944 #if defined(CONFIG_CMD_MTDPARTS)
 945         struct mtd_device *dev;
 946         struct part_info *part;
 947         u8 pnum;
 948
 949         if (argc >= 2) {
 950                 char *p = (argc == 2) ? argv[1] : argv[2];
 951                 if (!(str2long(p, &addr)) && (mtdparts_init() == 0) &&
 952                     (find_dev_and_part(p, &dev, &pnum, &part) == 0)) {
 953                         if (dev->id->type != MTD_DEV_TYPE_NAND) {
 954                                 puts("Not a NAND device\n");
 955                                 return 1;
 956                         }
 957                         if (argc > 3)
 958                                 goto usage;
 959                         if (argc == 3)
 960                                 addr = simple_strtoul(argv[1], NULL, 16);
 961                         else
 962                                 addr = CONFIG_SYS_LOAD_ADDR;
 963
 964                         mtd = get_nand_dev_by_index(dev->id->num);
 965                         return nand_load_image(cmdtp, mtd, part->offset,
 966                                                addr, argv[0]);
 967                 }
 968         }
 969 #endif
 970
 971         bootstage_mark(BOOTSTAGE_ID_NAND_PART);
 972         switch (argc) {
 973         case 1:
 974                 addr = CONFIG_SYS_LOAD_ADDR;
 975                 boot_device = env_get("bootdevice");
 976                 break;
 977         case 2:
 978                 addr = simple_strtoul(argv[1], NULL, 16);
 979                 boot_device = env_get("bootdevice");
 980                 break;
 981         case 3:
 982                 addr = simple_strtoul(argv[1], NULL, 16);
 983                 boot_device = argv[2];
 984                 break;
 985         case 4:
 986                 addr = simple_strtoul(argv[1], NULL, 16);
 987                 boot_device = argv[2];
 988                 offset = simple_strtoul(argv[3], NULL, 16);
 989                 break;
 990         default:
 991 #if defined(CONFIG_CMD_MTDPARTS)
 992 usage:
 993 #endif
 994                 bootstage_error(BOOTSTAGE_ID_NAND_SUFFIX);
 995                 return CMD_RET_USAGE;
 996         }
 997         bootstage_mark(BOOTSTAGE_ID_NAND_SUFFIX);
 998
 999         if (!boot_device) {
1000                 puts("\n** No boot device **\n");
1001                 bootstage_error(BOOTSTAGE_ID_NAND_BOOT_DEVICE);
1002                 return 1;
1003         }
1004         bootstage_mark(BOOTSTAGE_ID_NAND_BOOT_DEVICE);
1005
1006         idx = simple_strtoul(boot_device, NULL, 16);
1007
1008         mtd = get_nand_dev_by_index(idx);
1009         if (!mtd) {
1010                 printf("\n** Device %d not available\n", idx);
1011                 bootstage_error(BOOTSTAGE_ID_NAND_AVAILABLE);
1012                 return 1;
1013         }
1014         bootstage_mark(BOOTSTAGE_ID_NAND_AVAILABLE);
1015
1016         return nand_load_image(cmdtp, mtd, offset, addr, argv[0]);
1017 }
1018
1019 U_BOOT_CMD(nboot, 4, 1, do_nandboot,
1020         "boot from NAND device",
1021         "[partition] | [[[loadAddr] dev] offset]"
1022 );