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  * The function nand_biterror() in this file is inspired from
  22  * mtd-utils/nand-utils/nandflipbits.c which was released under GPLv2
  23  * only
  24  */
  25
  26 #include <common.h>
  27 #include <bootstage.h>
  28 #include <image.h>
  29 #include <asm/cache.h>
  30 #include <linux/mtd/mtd.h>
  31 #include <linux/mtd/rawnand.h>
  32 #include <command.h>
  33 #include <console.h>
  34 #include <env.h>
  35 #include <watchdog.h>
  36 #include <malloc.h>
  37 #include <asm/byteorder.h>
  38 #include <jffs2/jffs2.h>
  39 #include <nand.h>
  40
  41 #include "legacy-mtd-utils.h"
  42
  43 #if defined(CONFIG_CMD_MTDPARTS)
  44
  45 /* partition handling routines */
  46 int mtdparts_init(void);
  47 int find_dev_and_part(const char *id, struct mtd_device **dev,
  48                       u8 *part_num, struct part_info **part);
  49 #endif
  50
  51 #define MAX_NUM_PAGES 64
  52
  53 static int nand_biterror(struct mtd_info *mtd, ulong off, int bit)
  54 {
  55         int ret = 0;
  56         int page = 0;
  57         ulong  block_off;
  58         u_char *datbuf[MAX_NUM_PAGES]; /* Data and OOB */
  59         u_char data;
  60         int pages_per_blk = mtd->erasesize / mtd->writesize;
  61         struct erase_info einfo;
  62
  63         if (pages_per_blk > MAX_NUM_PAGES) {
  64                 printf("Too many pages in one erase block\n");
  65                 return 1;
  66         }
  67
  68         if (bit < 0 || bit > 7) {
  69                 printf("bit position 0 to 7 is allowed\n");
  70                 return 1;
  71         }
  72
  73         /* Allocate memory */
  74         memset(datbuf, 0, sizeof(datbuf));
  75         for (page = 0; page < pages_per_blk ; page++) {
  76                 datbuf[page] = malloc(mtd->writesize + mtd->oobsize);
  77                 if (!datbuf[page]) {
  78                         printf("No memory for page buffer\n");
  79                         ret = -ENOMEM;
  80                         goto free_memory;
  81                 }
  82         }
  83
  84         /* Align to erase block boundary */
  85         block_off = off & (~(mtd->erasesize - 1));
  86
  87         /* Read out memory as first step */
  88         for (page = 0; page < pages_per_blk ; page++) {
  89                 struct mtd_oob_ops ops;
  90                 loff_t addr = (loff_t)block_off;
  91
  92                 memset(&ops, 0, sizeof(ops));
  93                 ops.datbuf = datbuf[page];
  94                 ops.oobbuf = datbuf[page] + mtd->writesize;
  95                 ops.len = mtd->writesize;
  96                 ops.ooblen = mtd->oobsize;
  97                 ops.mode = MTD_OPS_RAW;
  98                 ret = mtd_read_oob(mtd, addr, &ops);
  99                 if (ret < 0) {
 100                         printf("Error (%d) reading page %08lx\n",
 101                                ret, block_off);
 102                         ret = 1;
 103                         goto free_memory;
 104                 }
 105                 block_off += mtd->writesize;
 106         }
 107
 108         /* Erase the block */
 109         memset(&einfo, 0, sizeof(einfo));
 110         einfo.mtd = mtd;
 111         /* Align to erase block boundary */
 112         einfo.addr = (loff_t)(off & (~(mtd->erasesize - 1)));
 113         einfo.len = mtd->erasesize;
 114         ret = mtd_erase(mtd, &einfo);
 115         if (ret < 0) {
 116                 printf("Error (%d) nand_erase_nand page %08llx\n",
 117                        ret, einfo.addr);
 118                 ret = 1;
 119                 goto free_memory;
 120         }
 121
 122         /* Twist a bit in data part */
 123         block_off = off & (mtd->erasesize - 1);
 124         data = datbuf[block_off / mtd->writesize][block_off % mtd->writesize];
 125         data ^= (1 << bit);
 126         datbuf[block_off / mtd->writesize][block_off % mtd->writesize] = data;
 127
 128         printf("Flip data at 0x%lx with xor 0x%02x (bit=%d) to value=0x%02x\n",
 129                off, (1 << bit), bit, data);
 130
 131         /* Write back twisted data and unmodified OOB */
 132         /* Align to erase block boundary */
 133         block_off = off & (~(mtd->erasesize - 1));
 134         for (page = 0; page < pages_per_blk; page++) {
 135                 struct mtd_oob_ops ops;
 136                 loff_t addr = (loff_t)block_off;
 137
 138                 memset(&ops, 0, sizeof(ops));
 139                 ops.datbuf = datbuf[page];
 140                 ops.oobbuf = datbuf[page] + mtd->writesize;
 141                 ops.len = mtd->writesize;
 142                 ops.ooblen = mtd->oobsize;
 143                 ops.mode = MTD_OPS_RAW;
 144                 ret = mtd_write_oob(mtd, addr, &ops);
 145                 if (ret < 0) {
 146                         printf("Error (%d) write page %08lx\n", ret, block_off);
 147                         ret = 1;
 148                         goto free_memory;
 149                 }
 150                 block_off += mtd->writesize;
 151         }
 152
 153 free_memory:
 154         for (page = 0; page < pages_per_blk ; page++) {
 155                 if (datbuf[page])
 156                         free(datbuf[page]);
 157         }
 158         return ret;
 159 }
 160
 161 static int nand_dump(struct mtd_info *mtd, ulong off, int only_oob,
 162                      int repeat)
 163 {
 164         int i;
 165         u_char *datbuf, *oobbuf, *p;
 166         static loff_t last;
 167         int ret = 0;
 168
 169         if (repeat)
 170                 off = last + mtd->writesize;
 171
 172         last = off;
 173
 174         datbuf = memalign(ARCH_DMA_MINALIGN, mtd->writesize);
 175         if (!datbuf) {
 176                 puts("No memory for page buffer\n");
 177                 return 1;
 178         }
 179
 180         oobbuf = memalign(ARCH_DMA_MINALIGN, mtd->oobsize);
 181         if (!oobbuf) {
 182                 puts("No memory for page buffer\n");
 183                 ret = 1;
 184                 goto free_dat;
 185         }
 186         off &= ~(mtd->writesize - 1);
 187         loff_t addr = (loff_t) off;
 188         struct mtd_oob_ops ops;
 189         memset(&ops, 0, sizeof(ops));
 190         ops.datbuf = datbuf;
 191         ops.oobbuf = oobbuf;
 192         ops.len = mtd->writesize;
 193         ops.ooblen = mtd->oobsize;
 194         ops.mode = MTD_OPS_RAW;
 195         i = mtd_read_oob(mtd, addr, &ops);
 196         if (i < 0) {
 197                 printf("Error (%d) reading page %08lx\n", i, off);
 198                 ret = 1;
 199                 goto free_all;
 200         }
 201         printf("Page %08lx dump:\n", off);
 202
 203         if (!only_oob) {
 204                 i = mtd->writesize >> 4;
 205                 p = datbuf;
 206
 207                 while (i--) {
 208                         printf("\t%02x %02x %02x %02x %02x %02x %02x %02x"
 209                                "  %02x %02x %02x %02x %02x %02x %02x %02x\n",
 210                                p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7],
 211                                p[8], p[9], p[10], p[11], p[12], p[13], p[14],
 212                                p[15]);
 213                         p += 16;
 214                 }
 215         }
 216
 217         puts("OOB:\n");
 218         i = mtd->oobsize >> 3;
 219         p = oobbuf;
 220         while (i--) {
 221                 printf("\t%02x %02x %02x %02x %02x %02x %02x %02x\n",
 222                        p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7]);
 223                 p += 8;
 224         }
 225
 226 free_all:
 227         free(oobbuf);
 228 free_dat:
 229         free(datbuf);
 230
 231         return ret;
 232 }
 233
 234 /* ------------------------------------------------------------------------- */
 235
 236 static int set_dev(int dev)
 237 {
 238         struct mtd_info *mtd = get_nand_dev_by_index(dev);
 239
 240         if (!mtd)
 241                 return -ENODEV;
 242
 243         if (nand_curr_device == dev)
 244                 return 0;
 245
 246         printf("Device %d: %s", dev, mtd->name);
 247         puts("... is now current device\n");
 248         nand_curr_device = dev;
 249
 250 #ifdef CONFIG_SYS_NAND_SELECT_DEVICE
 251         board_nand_select_device(mtd_to_nand(mtd), dev);
 252 #endif
 253
 254         return 0;
 255 }
 256
 257 #ifdef CONFIG_CMD_NAND_LOCK_UNLOCK
 258 static void print_status(ulong start, ulong end, ulong erasesize, int status)
 259 {
 260         /*
 261          * Micron NAND flash (e.g. MT29F4G08ABADAH4) BLOCK LOCK READ STATUS is
 262          * not the same as others.  Instead of bit 1 being lock, it is
 263          * #lock_tight. To make the driver support either format, ignore bit 1
 264          * and use only bit 0 and bit 2.
 265          */
 266         printf("%08lx - %08lx: %08lx blocks %s%s%s\n",
 267                 start,
 268                 end - 1,
 269                 (end - start) / erasesize,
 270                 ((status & NAND_LOCK_STATUS_TIGHT) ?  "TIGHT " : ""),
 271                 (!(status & NAND_LOCK_STATUS_UNLOCK) ?  "LOCK " : ""),
 272                 ((status & NAND_LOCK_STATUS_UNLOCK) ?  "UNLOCK " : ""));
 273 }
 274
 275 static void do_nand_status(struct mtd_info *mtd)
 276 {
 277         ulong block_start = 0;
 278         ulong off;
 279         int last_status = -1;
 280
 281         struct nand_chip *nand_chip = mtd_to_nand(mtd);
 282         /* check the WP bit */
 283         nand_chip->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1);
 284         printf("device is %swrite protected\n",
 285                 (nand_chip->read_byte(mtd) & 0x80 ?
 286                  "NOT " : ""));
 287
 288         for (off = 0; off < mtd->size; off += mtd->erasesize) {
 289                 int s = nand_get_lock_status(mtd, off);
 290
 291                 /* print message only if status has changed */
 292                 if (s != last_status && off != 0) {
 293                         print_status(block_start, off, mtd->erasesize,
 294                                         last_status);
 295                         block_start = off;
 296                 }
 297                 last_status = s;
 298         }
 299         /* Print the last block info */
 300         print_status(block_start, off, mtd->erasesize, last_status);
 301 }
 302 #endif
 303
 304 #ifdef CONFIG_ENV_OFFSET_OOB
 305 unsigned long nand_env_oob_offset;
 306
 307 int do_nand_env_oob(struct cmd_tbl *cmdtp, int argc, char *const argv[])
 308 {
 309         int ret;
 310         uint32_t oob_buf[ENV_OFFSET_SIZE/sizeof(uint32_t)];
 311         struct mtd_info *mtd = get_nand_dev_by_index(0);
 312         char *cmd = argv[1];
 313
 314         if (CONFIG_SYS_MAX_NAND_DEVICE == 0 || !mtd) {
 315                 puts("no devices available\n");
 316                 return 1;
 317         }
 318
 319         set_dev(0);
 320
 321         if (!strcmp(cmd, "get")) {
 322                 ret = get_nand_env_oob(mtd, &nand_env_oob_offset);
 323                 if (ret)
 324                         return 1;
 325
 326                 printf("0x%08lx\n", nand_env_oob_offset);
 327         } else if (!strcmp(cmd, "set")) {
 328                 loff_t addr;
 329                 loff_t maxsize;
 330                 struct mtd_oob_ops ops;
 331                 int idx = 0;
 332
 333                 if (argc < 3)
 334                         goto usage;
 335
 336                 mtd = get_nand_dev_by_index(idx);
 337                 /* We don't care about size, or maxsize. */
 338                 if (mtd_arg_off(argv[2], &idx, &addr, &maxsize, &maxsize,
 339                                 MTD_DEV_TYPE_NAND, mtd->size)) {
 340                         puts("Offset or partition name expected\n");
 341                         return 1;
 342                 }
 343                 if (set_dev(idx)) {
 344                         puts("Offset or partition name expected\n");
 345                         return 1;
 346                 }
 347
 348                 if (idx != 0) {
 349                         puts("Partition not on first NAND device\n");
 350                         return 1;
 351                 }
 352
 353                 if (mtd->oobavail < ENV_OFFSET_SIZE) {
 354                         printf("Insufficient available OOB bytes:\n"
 355                                "%d OOB bytes available but %d required for "
 356                                "env.oob support\n",
 357                                mtd->oobavail, ENV_OFFSET_SIZE);
 358                         return 1;
 359                 }
 360
 361                 if ((addr & (mtd->erasesize - 1)) != 0) {
 362                         printf("Environment offset must be block-aligned\n");
 363                         return 1;
 364                 }
 365
 366                 ops.datbuf = NULL;
 367                 ops.mode = MTD_OOB_AUTO;
 368                 ops.ooboffs = 0;
 369                 ops.ooblen = ENV_OFFSET_SIZE;
 370                 ops.oobbuf = (void *) oob_buf;
 371
 372                 oob_buf[0] = ENV_OOB_MARKER;
 373                 oob_buf[1] = addr / mtd->erasesize;
 374
 375                 ret = mtd->write_oob(mtd, ENV_OFFSET_SIZE, &ops);
 376                 if (ret) {
 377                         printf("Error writing OOB block 0\n");
 378                         return ret;
 379                 }
 380
 381                 ret = get_nand_env_oob(mtd, &nand_env_oob_offset);
 382                 if (ret) {
 383                         printf("Error reading env offset in OOB\n");
 384                         return ret;
 385                 }
 386
 387                 if (addr != nand_env_oob_offset) {
 388                         printf("Verification of env offset in OOB failed: "
 389                                "0x%08llx expected but got 0x%08lx\n",
 390                                (unsigned long long)addr, nand_env_oob_offset);
 391                         return 1;
 392                 }
 393         } else {
 394                 goto usage;
 395         }
 396
 397         return ret;
 398
 399 usage:
 400         return CMD_RET_USAGE;
 401 }
 402
 403 #endif
 404
 405 static void nand_print_and_set_info(int idx)
 406 {
 407         struct mtd_info *mtd;
 408         struct nand_chip *chip;
 409
 410         mtd = get_nand_dev_by_index(idx);
 411         if (!mtd)
 412                 return;
 413
 414         chip = mtd_to_nand(mtd);
 415         printf("Device %d: ", idx);
 416         if (chip->numchips > 1)
 417                 printf("%dx ", chip->numchips);
 418         printf("%s, sector size %u KiB\n",
 419                mtd->name, mtd->erasesize >> 10);
 420         printf("  Page size   %8d b\n", mtd->writesize);
 421         printf("  OOB size    %8d b\n", mtd->oobsize);
 422         printf("  Erase size  %8d b\n", mtd->erasesize);
 423         printf("  subpagesize %8d b\n", chip->subpagesize);
 424         printf("  options     0x%08x\n", chip->options);
 425         printf("  bbt options 0x%08x\n", chip->bbt_options);
 426
 427         /* Set geometry info */
 428         env_set_hex("nand_writesize", mtd->writesize);
 429         env_set_hex("nand_oobsize", mtd->oobsize);
 430         env_set_hex("nand_erasesize", mtd->erasesize);
 431 }
 432
 433 static int raw_access(struct mtd_info *mtd, ulong addr, loff_t off,
 434                       ulong count, int read, int no_verify)
 435 {
 436         int ret = 0;
 437
 438         while (count--) {
 439                 /* Raw access */
 440                 mtd_oob_ops_t ops = {
 441                         .datbuf = (u8 *)addr,
 442                         .oobbuf = ((u8 *)addr) + mtd->writesize,
 443                         .len = mtd->writesize,
 444                         .ooblen = mtd->oobsize,
 445                         .mode = MTD_OPS_RAW
 446                 };
 447
 448                 if (read) {
 449                         ret = mtd_read_oob(mtd, off, &ops);
 450                 } else {
 451                         ret = mtd_write_oob(mtd, off, &ops);
 452                         if (!ret && !no_verify)
 453                                 ret = nand_verify_page_oob(mtd, &ops, off);
 454                 }
 455
 456                 if (ret) {
 457                         printf("%s: error at offset %llx, ret %d\n",
 458                                 __func__, (long long)off, ret);
 459                         break;
 460                 }
 461
 462                 addr += mtd->writesize + mtd->oobsize;
 463                 off += mtd->writesize;
 464         }
 465
 466         return ret;
 467 }
 468
 469 /* Adjust a chip/partition size down for bad blocks so we don't
 470  * read/write past the end of a chip/partition by accident.
 471  */
 472 static void adjust_size_for_badblocks(loff_t *size, loff_t offset, int dev)
 473 {
 474         /* We grab the nand info object here fresh because this is usually
 475          * called after arg_off_size() which can change the value of dev.
 476          */
 477         struct mtd_info *mtd = get_nand_dev_by_index(dev);
 478         loff_t maxoffset = offset + *size;
 479         int badblocks = 0;
 480
 481         /* count badblocks in NAND from offset to offset + size */
 482         for (; offset < maxoffset; offset += mtd->erasesize) {
 483                 if (nand_block_isbad(mtd, offset))
 484                         badblocks++;
 485         }
 486         /* adjust size if any bad blocks found */
 487         if (badblocks) {
 488                 *size -= badblocks * mtd->erasesize;
 489                 printf("size adjusted to 0x%llx (%d bad blocks)\n",
 490                        (unsigned long long)*size, badblocks);
 491         }
 492 }
 493
 494 static int do_nand(struct cmd_tbl *cmdtp, int flag, int argc,
 495                    char *const argv[])
 496 {
 497         int i, ret = 0;
 498         ulong addr;
 499         loff_t off, size, maxsize;
 500         char *cmd, *s;
 501         struct mtd_info *mtd;
 502 #ifdef CONFIG_SYS_NAND_QUIET
 503         int quiet = CONFIG_SYS_NAND_QUIET;
 504 #else
 505         int quiet = 0;
 506 #endif
 507         const char *quiet_str = env_get("quiet");
 508         int dev = nand_curr_device;
 509         int repeat = flag & CMD_FLAG_REPEAT;
 510
 511         /* at least two arguments please */
 512         if (argc < 2)
 513                 goto usage;
 514
 515         if (quiet_str)
 516                 quiet = simple_strtoul(quiet_str, NULL, 0) != 0;
 517
 518         cmd = argv[1];
 519
 520         /* Only "dump" is repeatable. */
 521         if (repeat && strcmp(cmd, "dump"))
 522                 return 0;
 523
 524         if (strcmp(cmd, "info") == 0) {
 525
 526                 putc('\n');
 527                 for (i = 0; i < CONFIG_SYS_MAX_NAND_DEVICE; i++)
 528                         nand_print_and_set_info(i);
 529                 return 0;
 530         }
 531
 532         if (strcmp(cmd, "device") == 0) {
 533                 if (argc < 3) {
 534                         putc('\n');
 535                         if (dev < 0 || dev >= CONFIG_SYS_MAX_NAND_DEVICE)
 536                                 puts("no devices available\n");
 537                         else
 538                                 nand_print_and_set_info(dev);
 539                         return 0;
 540                 }
 541
 542                 dev = (int)dectoul(argv[2], NULL);
 543                 set_dev(dev);
 544
 545                 return 0;
 546         }
 547
 548 #ifdef CONFIG_ENV_OFFSET_OOB
 549         /* this command operates only on the first nand device */
 550         if (strcmp(cmd, "env.oob") == 0)
 551                 return do_nand_env_oob(cmdtp, argc - 1, argv + 1);
 552 #endif
 553
 554         /* The following commands operate on the current device, unless
 555          * overridden by a partition specifier.  Note that if somehow the
 556          * current device is invalid, it will have to be changed to a valid
 557          * one before these commands can run, even if a partition specifier
 558          * for another device is to be used.
 559          */
 560         mtd = get_nand_dev_by_index(dev);
 561         if (!mtd) {
 562                 puts("\nno devices available\n");
 563                 return 1;
 564         }
 565
 566         if (strcmp(cmd, "bad") == 0) {
 567                 printf("\nDevice %d bad blocks:\n", dev);
 568                 for (off = 0; off < mtd->size; off += mtd->erasesize)
 569                         if (nand_block_isbad(mtd, off))
 570                                 printf("  %08llx\n", (unsigned long long)off);
 571                 return 0;
 572         }
 573
 574         /*
 575          * Syntax is:
 576          *   0    1     2       3    4
 577          *   nand erase [clean] [off size]
 578          */
 579         if (strncmp(cmd, "erase", 5) == 0 || strncmp(cmd, "scrub", 5) == 0) {
 580                 nand_erase_options_t opts;
 581                 /* "clean" at index 2 means request to write cleanmarker */
 582                 int clean = argc > 2 && !strcmp("clean", argv[2]);
 583                 int scrub_yes = argc > 2 && !strcmp("-y", argv[2]);
 584                 int o = (clean || scrub_yes) ? 3 : 2;
 585                 int scrub = !strncmp(cmd, "scrub", 5);
 586                 int spread = 0;
 587                 int args = 2;
 588                 const char *scrub_warn =
 589                         "Warning: "
 590                         "scrub option will erase all factory set bad blocks!\n"
 591                         "         "
 592                         "There is no reliable way to recover them.\n"
 593                         "         "
 594                         "Use this command only for testing purposes if you\n"
 595                         "         "
 596                         "are sure of what you are doing!\n"
 597                         "\nReally scrub this NAND flash? <y/N>\n";
 598
 599                 if (cmd[5] != 0) {
 600                         if (!strcmp(&cmd[5], ".spread")) {
 601                                 spread = 1;
 602                         } else if (!strcmp(&cmd[5], ".part")) {
 603                                 args = 1;
 604                         } else if (!strcmp(&cmd[5], ".chip")) {
 605                                 args = 0;
 606                         } else {
 607                                 goto usage;
 608                         }
 609                 }
 610
 611                 /*
 612                  * Don't allow missing arguments to cause full chip/partition
 613                  * erases -- easy to do accidentally, e.g. with a misspelled
 614                  * variable name.
 615                  */
 616                 if (argc != o + args)
 617                         goto usage;
 618
 619                 printf("\nNAND %s: ", cmd);
 620                 /* skip first two or three arguments, look for offset and size */
 621                 if (mtd_arg_off_size(argc - o, argv + o, &dev, &off, &size,
 622                                      &maxsize, MTD_DEV_TYPE_NAND,
 623                                      mtd->size) != 0)
 624                         return 1;
 625
 626                 if (set_dev(dev))
 627                         return 1;
 628
 629                 mtd = get_nand_dev_by_index(dev);
 630
 631                 memset(&opts, 0, sizeof(opts));
 632                 opts.offset = off;
 633                 opts.length = size;
 634                 opts.jffs2  = clean;
 635                 opts.quiet  = quiet;
 636                 opts.spread = spread;
 637
 638                 if (scrub) {
 639                         if (scrub_yes) {
 640                                 opts.scrub = 1;
 641                         } else {
 642                                 puts(scrub_warn);
 643                                 if (confirm_yesno()) {
 644                                         opts.scrub = 1;
 645                                 } else {
 646                                         puts("scrub aborted\n");
 647                                         return 1;
 648                                 }
 649                         }
 650                 }
 651                 ret = nand_erase_opts(mtd, &opts);
 652                 printf("%s\n", ret ? "ERROR" : "OK");
 653
 654                 return ret == 0 ? 0 : 1;
 655         }
 656
 657         if (strncmp(cmd, "dump", 4) == 0) {
 658                 if (argc < 3)
 659                         goto usage;
 660
 661                 off = (int)hextoul(argv[2], NULL);
 662                 ret = nand_dump(mtd, off, !strcmp(&cmd[4], ".oob"), repeat);
 663
 664                 return ret == 0 ? 1 : 0;
 665         }
 666
 667         if (strncmp(cmd, "read", 4) == 0 || strncmp(cmd, "write", 5) == 0) {
 668                 size_t rwsize;
 669                 ulong pagecount = 1;
 670                 int read;
 671                 int raw = 0;
 672                 int no_verify = 0;
 673
 674                 if (argc < 4)
 675                         goto usage;
 676
 677                 addr = (ulong)hextoul(argv[2], NULL);
 678
 679                 read = strncmp(cmd, "read", 4) == 0; /* 1 = read, 0 = write */
 680                 printf("\nNAND %s: ", read ? "read" : "write");
 681
 682                 s = strchr(cmd, '.');
 683
 684                 if (s && !strncmp(s, ".raw", 4)) {
 685                         raw = 1;
 686
 687                         if (!strcmp(s, ".raw.noverify"))
 688                                 no_verify = 1;
 689
 690                         if (mtd_arg_off(argv[3], &dev, &off, &size, &maxsize,
 691                                         MTD_DEV_TYPE_NAND,
 692                                         mtd->size))
 693                                 return 1;
 694
 695                         if (set_dev(dev))
 696                                 return 1;
 697
 698                         mtd = get_nand_dev_by_index(dev);
 699
 700                         if (argc > 4 && !str2long(argv[4], &pagecount)) {
 701                                 printf("'%s' is not a number\n", argv[4]);
 702                                 return 1;
 703                         }
 704
 705                         if (pagecount * mtd->writesize > size) {
 706                                 puts("Size exceeds partition or device limit\n");
 707                                 return -1;
 708                         }
 709
 710                         rwsize = pagecount * (mtd->writesize + mtd->oobsize);
 711                 } else {
 712                         if (mtd_arg_off_size(argc - 3, argv + 3, &dev, &off,
 713                                              &size, &maxsize,
 714                                              MTD_DEV_TYPE_NAND,
 715                                              mtd->size) != 0)
 716                                 return 1;
 717
 718                         if (set_dev(dev))
 719                                 return 1;
 720
 721                         /* size is unspecified */
 722                         if (argc < 5)
 723                                 adjust_size_for_badblocks(&size, off, dev);
 724                         rwsize = size;
 725                 }
 726
 727                 mtd = get_nand_dev_by_index(dev);
 728
 729                 if (!s || !strcmp(s, ".jffs2") ||
 730                     !strcmp(s, ".e") || !strcmp(s, ".i")) {
 731                         if (read)
 732                                 ret = nand_read_skip_bad(mtd, off, &rwsize,
 733                                                          NULL, maxsize,
 734                                                          (u_char *)addr);
 735                         else
 736                                 ret = nand_write_skip_bad(mtd, off, &rwsize,
 737                                                           NULL, maxsize,
 738                                                           (u_char *)addr,
 739                                                           WITH_WR_VERIFY);
 740 #ifdef CONFIG_CMD_NAND_TRIMFFS
 741                 } else if (!strcmp(s, ".trimffs")) {
 742                         if (read) {
 743                                 printf("Unknown nand command suffix '%s'\n", s);
 744                                 return 1;
 745                         }
 746                         ret = nand_write_skip_bad(mtd, off, &rwsize, NULL,
 747                                                 maxsize, (u_char *)addr,
 748                                                 WITH_DROP_FFS | WITH_WR_VERIFY);
 749 #endif
 750                 } else if (!strcmp(s, ".oob")) {
 751                         /* out-of-band data */
 752                         mtd_oob_ops_t ops = {
 753                                 .oobbuf = (u8 *)addr,
 754                                 .ooblen = rwsize,
 755                                 .mode = MTD_OPS_RAW
 756                         };
 757
 758                         if (read)
 759                                 ret = mtd_read_oob(mtd, off, &ops);
 760                         else
 761                                 ret = mtd_write_oob(mtd, off, &ops);
 762                 } else if (raw) {
 763                         ret = raw_access(mtd, addr, off, pagecount, read,
 764                                          no_verify);
 765                 } else {
 766                         printf("Unknown nand command suffix '%s'.\n", s);
 767                         return 1;
 768                 }
 769
 770                 printf(" %zu bytes %s: %s\n", rwsize,
 771                        read ? "read" : "written", ret ? "ERROR" : "OK");
 772
 773                 return ret == 0 ? 0 : 1;
 774         }
 775
 776 #ifdef CONFIG_CMD_NAND_TORTURE
 777         if (strcmp(cmd, "torture") == 0) {
 778                 loff_t endoff;
 779                 unsigned int failed = 0, passed = 0;
 780
 781                 if (argc < 3)
 782                         goto usage;
 783
 784                 if (!str2off(argv[2], &off)) {
 785                         puts("Offset is not a valid number\n");
 786                         return 1;
 787                 }
 788
 789                 size = mtd->erasesize;
 790                 if (argc > 3) {
 791                         if (!str2off(argv[3], &size)) {
 792                                 puts("Size is not a valid number\n");
 793                                 return 1;
 794                         }
 795                 }
 796
 797                 endoff = off + size;
 798                 if (endoff > mtd->size) {
 799                         puts("Arguments beyond end of NAND\n");
 800                         return 1;
 801                 }
 802
 803                 off = round_down(off, mtd->erasesize);
 804                 endoff = round_up(endoff, mtd->erasesize);
 805                 size = endoff - off;
 806                 printf("\nNAND torture: device %d offset 0x%llx size 0x%llx (block size 0x%x)\n",
 807                        dev, off, size, mtd->erasesize);
 808                 while (off < endoff) {
 809                         ret = nand_torture(mtd, off);
 810                         if (ret) {
 811                                 failed++;
 812                                 printf("  block at 0x%llx failed\n", off);
 813                         } else {
 814                                 passed++;
 815                         }
 816                         off += mtd->erasesize;
 817                 }
 818                 printf(" Passed: %u, failed: %u\n", passed, failed);
 819                 return failed != 0;
 820         }
 821 #endif
 822
 823         if (strcmp(cmd, "markbad") == 0) {
 824                 argc -= 2;
 825                 argv += 2;
 826
 827                 if (argc <= 0)
 828                         goto usage;
 829
 830                 while (argc > 0) {
 831                         addr = hextoul(*argv, NULL);
 832
 833                         if (mtd_block_markbad(mtd, addr)) {
 834                                 printf("block 0x%08lx NOT marked "
 835                                         "as bad! ERROR %d\n",
 836                                         addr, ret);
 837                                 ret = 1;
 838                         } else {
 839                                 printf("block 0x%08lx successfully "
 840                                         "marked as bad\n",
 841                                         addr);
 842                         }
 843                         --argc;
 844                         ++argv;
 845                 }
 846                 return ret;
 847         }
 848
 849         if (strcmp(cmd, "biterr") == 0) {
 850                 int bit;
 851
 852                 if (argc != 4)
 853                         goto usage;
 854
 855                 off = (int)simple_strtoul(argv[2], NULL, 16);
 856                 bit = (int)simple_strtoul(argv[3], NULL, 10);
 857                 ret = nand_biterror(mtd, off, bit);
 858                 return ret;
 859         }
 860
 861 #ifdef CONFIG_CMD_NAND_LOCK_UNLOCK
 862         if (strcmp(cmd, "lock") == 0) {
 863                 int tight = 0;
 864                 int status = 0;
 865                 if (argc == 3) {
 866                         if (!strcmp("tight", argv[2]))
 867                                 tight = 1;
 868                         if (!strcmp("status", argv[2]))
 869                                 status = 1;
 870                 }
 871                 if (status) {
 872                         do_nand_status(mtd);
 873                 } else {
 874                         if (!nand_lock(mtd, tight)) {
 875                                 puts("NAND flash successfully locked\n");
 876                         } else {
 877                                 puts("Error locking NAND flash\n");
 878                                 return 1;
 879                         }
 880                 }
 881                 return 0;
 882         }
 883
 884         if (strncmp(cmd, "unlock", 5) == 0) {
 885                 int allexcept = 0;
 886
 887                 s = strchr(cmd, '.');
 888
 889                 if (s && !strcmp(s, ".allexcept"))
 890                         allexcept = 1;
 891
 892                 if (mtd_arg_off_size(argc - 2, argv + 2, &dev, &off, &size,
 893                                      &maxsize, MTD_DEV_TYPE_NAND,
 894                                      mtd->size) < 0)
 895                         return 1;
 896
 897                 if (set_dev(dev))
 898                         return 1;
 899
 900                 mtd = get_nand_dev_by_index(dev);
 901
 902                 if (!nand_unlock(mtd, off, size, allexcept)) {
 903                         puts("NAND flash successfully unlocked\n");
 904                 } else {
 905                         puts("Error unlocking NAND flash, "
 906                              "write and erase will probably fail\n");
 907                         return 1;
 908                 }
 909                 return 0;
 910         }
 911 #endif
 912
 913 usage:
 914         return CMD_RET_USAGE;
 915 }
 916
 917 #ifdef CONFIG_SYS_LONGHELP
 918 static char nand_help_text[] =
 919         "info - show available NAND devices\n"
 920         "nand device [dev] - show or set current device\n"
 921         "nand read - addr off|partition size\n"
 922         "nand write - addr off|partition size\n"
 923         "    read/write 'size' bytes starting at offset 'off'\n"
 924         "    to/from memory address 'addr', skipping bad blocks.\n"
 925         "nand read.raw - addr off|partition [count]\n"
 926         "nand write.raw[.noverify] - addr off|partition [count]\n"
 927         "    Use read.raw/write.raw to avoid ECC and access the flash as-is.\n"
 928 #ifdef CONFIG_CMD_NAND_TRIMFFS
 929         "nand write.trimffs - addr off|partition size\n"
 930         "    write 'size' bytes starting at offset 'off' from memory address\n"
 931         "    'addr', skipping bad blocks and dropping any pages at the end\n"
 932         "    of eraseblocks that contain only 0xFF\n"
 933 #endif
 934         "nand erase[.spread] [clean] off size - erase 'size' bytes "
 935         "from offset 'off'\n"
 936         "    With '.spread', erase enough for given file size, otherwise,\n"
 937         "    'size' includes skipped bad blocks.\n"
 938         "nand erase.part [clean] partition - erase entire mtd partition'\n"
 939         "nand erase.chip [clean] - erase entire chip'\n"
 940         "nand bad - show bad blocks\n"
 941         "nand dump[.oob] off - dump page\n"
 942 #ifdef CONFIG_CMD_NAND_TORTURE
 943         "nand torture off - torture one block at offset\n"
 944         "nand torture off [size] - torture blocks from off to off+size\n"
 945 #endif
 946         "nand scrub [-y] off size | scrub.part partition | scrub.chip\n"
 947         "    really clean NAND erasing bad blocks (UNSAFE)\n"
 948         "nand markbad off [...] - mark bad block(s) at offset (UNSAFE)\n"
 949         "nand biterr off bit - make a bit error at offset and bit position (UNSAFE)"
 950 #ifdef CONFIG_CMD_NAND_LOCK_UNLOCK
 951         "\n"
 952         "nand lock [tight] [status]\n"
 953         "    bring nand to lock state or display locked pages\n"
 954         "nand unlock[.allexcept] [offset] [size] - unlock section"
 955 #endif
 956 #ifdef CONFIG_ENV_OFFSET_OOB
 957         "\n"
 958         "nand env.oob - environment offset in OOB of block 0 of"
 959         "    first device.\n"
 960         "nand env.oob set off|partition - set enviromnent offset\n"
 961         "nand env.oob get - get environment offset"
 962 #endif
 963         "";
 964 #endif
 965
 966 U_BOOT_CMD(
 967         nand, CONFIG_SYS_MAXARGS, 1, do_nand,
 968         "NAND sub-system", nand_help_text
 969 );
 970
 971 static int nand_load_image(struct cmd_tbl *cmdtp, struct mtd_info *mtd,
 972                            ulong offset, ulong addr, char *cmd)
 973 {
 974         int r;
 975         char *s;
 976         size_t cnt;
 977 #if defined(CONFIG_LEGACY_IMAGE_FORMAT)
 978         struct legacy_img_hdr *hdr;
 979 #endif
 980 #if defined(CONFIG_FIT)
 981         const void *fit_hdr = NULL;
 982 #endif
 983
 984         s = strchr(cmd, '.');
 985         if (s != NULL &&
 986             (strcmp(s, ".jffs2") && strcmp(s, ".e") && strcmp(s, ".i"))) {
 987                 printf("Unknown nand load suffix '%s'\n", s);
 988                 bootstage_error(BOOTSTAGE_ID_NAND_SUFFIX);
 989                 return 1;
 990         }
 991
 992         printf("\nLoading from %s, offset 0x%lx\n", mtd->name, offset);
 993
 994         cnt = mtd->writesize;
 995         r = nand_read_skip_bad(mtd, offset, &cnt, NULL, mtd->size,
 996                                (u_char *)addr);
 997         if (r) {
 998                 puts("** Read error\n");
 999                 bootstage_error(BOOTSTAGE_ID_NAND_HDR_READ);
1000                 return 1;
1001         }
1002         bootstage_mark(BOOTSTAGE_ID_NAND_HDR_READ);
1003
1004         switch (genimg_get_format ((void *)addr)) {
1005 #if defined(CONFIG_LEGACY_IMAGE_FORMAT)
1006         case IMAGE_FORMAT_LEGACY:
1007                 hdr = (struct legacy_img_hdr *)addr;
1008
1009                 bootstage_mark(BOOTSTAGE_ID_NAND_TYPE);
1010                 image_print_contents (hdr);
1011
1012                 cnt = image_get_image_size (hdr);
1013                 break;
1014 #endif
1015 #if defined(CONFIG_FIT)
1016         case IMAGE_FORMAT_FIT:
1017                 fit_hdr = (const void *)addr;
1018                 puts ("Fit image detected...\n");
1019
1020                 cnt = fit_get_size (fit_hdr);
1021                 break;
1022 #endif
1023         default:
1024                 bootstage_error(BOOTSTAGE_ID_NAND_TYPE);
1025                 puts ("** Unknown image type\n");
1026                 return 1;
1027         }
1028         bootstage_mark(BOOTSTAGE_ID_NAND_TYPE);
1029
1030         r = nand_read_skip_bad(mtd, offset, &cnt, NULL, mtd->size,
1031                                (u_char *)addr);
1032         if (r) {
1033                 puts("** Read error\n");
1034                 bootstage_error(BOOTSTAGE_ID_NAND_READ);
1035                 return 1;
1036         }
1037         bootstage_mark(BOOTSTAGE_ID_NAND_READ);
1038
1039 #if defined(CONFIG_FIT)
1040         /* This cannot be done earlier, we need complete FIT image in RAM first */
1041         if (genimg_get_format ((void *)addr) == IMAGE_FORMAT_FIT) {
1042                 if (fit_check_format(fit_hdr, IMAGE_SIZE_INVAL)) {
1043                         bootstage_error(BOOTSTAGE_ID_NAND_FIT_READ);
1044                         puts ("** Bad FIT image format\n");
1045                         return 1;
1046                 }
1047                 bootstage_mark(BOOTSTAGE_ID_NAND_FIT_READ_OK);
1048                 fit_print_contents (fit_hdr);
1049         }
1050 #endif
1051
1052         /* Loading ok, update default load address */
1053
1054         image_load_addr = addr;
1055
1056         return bootm_maybe_autostart(cmdtp, cmd);
1057 }
1058
1059 static int do_nandboot(struct cmd_tbl *cmdtp, int flag, int argc,
1060                        char *const argv[])
1061 {
1062         char *boot_device = NULL;
1063         int idx;
1064         ulong addr, offset = 0;
1065         struct mtd_info *mtd;
1066 #if defined(CONFIG_CMD_MTDPARTS)
1067         struct mtd_device *dev;
1068         struct part_info *part;
1069         u8 pnum;
1070
1071         if (argc >= 2) {
1072                 char *p = (argc == 2) ? argv[1] : argv[2];
1073                 if (!(str2long(p, &addr)) && (mtdparts_init() == 0) &&
1074                     (find_dev_and_part(p, &dev, &pnum, &part) == 0)) {
1075                         if (dev->id->type != MTD_DEV_TYPE_NAND) {
1076                                 puts("Not a NAND device\n");
1077                                 return 1;
1078                         }
1079                         if (argc > 3)
1080                                 goto usage;
1081                         if (argc == 3)
1082                                 addr = hextoul(argv[1], NULL);
1083                         else
1084                                 addr = CONFIG_SYS_LOAD_ADDR;
1085
1086                         mtd = get_nand_dev_by_index(dev->id->num);
1087                         return nand_load_image(cmdtp, mtd, part->offset,
1088                                                addr, argv[0]);
1089                 }
1090         }
1091 #endif
1092
1093         bootstage_mark(BOOTSTAGE_ID_NAND_PART);
1094         switch (argc) {
1095         case 1:
1096                 addr = CONFIG_SYS_LOAD_ADDR;
1097                 boot_device = env_get("bootdevice");
1098                 break;
1099         case 2:
1100                 addr = hextoul(argv[1], NULL);
1101                 boot_device = env_get("bootdevice");
1102                 break;
1103         case 3:
1104                 addr = hextoul(argv[1], NULL);
1105                 boot_device = argv[2];
1106                 break;
1107         case 4:
1108                 addr = hextoul(argv[1], NULL);
1109                 boot_device = argv[2];
1110                 offset = hextoul(argv[3], NULL);
1111                 break;
1112         default:
1113 #if defined(CONFIG_CMD_MTDPARTS)
1114 usage:
1115 #endif
1116                 bootstage_error(BOOTSTAGE_ID_NAND_SUFFIX);
1117                 return CMD_RET_USAGE;
1118         }
1119         bootstage_mark(BOOTSTAGE_ID_NAND_SUFFIX);
1120
1121         if (!boot_device) {
1122                 puts("\n** No boot device **\n");
1123                 bootstage_error(BOOTSTAGE_ID_NAND_BOOT_DEVICE);
1124                 return 1;
1125         }
1126         bootstage_mark(BOOTSTAGE_ID_NAND_BOOT_DEVICE);
1127
1128         idx = hextoul(boot_device, NULL);
1129
1130         mtd = get_nand_dev_by_index(idx);
1131         if (!mtd) {
1132                 printf("\n** Device %d not available\n", idx);
1133                 bootstage_error(BOOTSTAGE_ID_NAND_AVAILABLE);
1134                 return 1;
1135         }
1136         bootstage_mark(BOOTSTAGE_ID_NAND_AVAILABLE);
1137
1138         return nand_load_image(cmdtp, mtd, offset, addr, argv[0]);
1139 }
1140
1141 U_BOOT_CMD(nboot, 4, 1, do_nandboot,
1142         "boot from NAND device",
1143         "[partition] | [[[loadAddr] dev] offset]"
1144 );