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