common/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  * Added 16-bit nand support
   8  * (C) 2004 Texas Instruments
   9  */
  10
  11 #include <common.h>
  12
  13
  14 #ifndef CFG_NAND_LEGACY
  15 /*
  16  *
  17  * New NAND support
  18  *
  19  */
  20 #include <common.h>
  21
  22 #if (CONFIG_COMMANDS & CFG_CMD_NAND)
  23
  24 #include <command.h>
  25 #include <watchdog.h>
  26 #include <malloc.h>
  27 #include <asm/byteorder.h>
  28
  29 #ifdef CONFIG_SHOW_BOOT_PROGRESS
  30 # include <status_led.h>
  31 # define SHOW_BOOT_PROGRESS(arg)        show_boot_progress(arg)
  32 #else
  33 # define SHOW_BOOT_PROGRESS(arg)
  34 #endif
  35
  36 #include <jffs2/jffs2.h>
  37 #include <nand.h>
  38
  39 extern nand_info_t nand_info[];       /* info for NAND chips */
  40
  41 static int nand_dump_oob(nand_info_t *nand, ulong off)
  42 {
  43         return 0;
  44 }
  45
  46 static int nand_dump(nand_info_t *nand, ulong off)
  47 {
  48         int i;
  49         u_char *buf, *p;
  50
  51         buf = malloc(nand->oobblock + nand->oobsize);
  52         if (!buf) {
  53                 puts("No memory for page buffer\n");
  54                 return 1;
  55         }
  56         off &= ~(nand->oobblock - 1);
  57         i = nand_read_raw(nand, buf, off, nand->oobblock, nand->oobsize);
  58         if (i < 0) {
  59                 printf("Error (%d) reading page %08x\n", i, off);
  60                 free(buf);
  61                 return 1;
  62         }
  63         printf("Page %08x dump:\n", off);
  64         i = nand->oobblock >> 4; p = buf;
  65         while (i--) {
  66                 printf( "\t%02x %02x %02x %02x %02x %02x %02x %02x"
  67                         "  %02x %02x %02x %02x %02x %02x %02x %02x\n",
  68                         p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7],
  69                         p[8], p[9], p[10], p[11], p[12], p[13], p[14], p[15]);
  70                 p += 16;
  71         }
  72         puts("OOB:\n");
  73         i = nand->oobsize >> 3;
  74         while (i--) {
  75                 printf( "\t%02x %02x %02x %02x %02x %02x %02x %02x\n",
  76                         p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7]);
  77                 p += 8;
  78         }
  79         free(buf);
  80
  81         return 0;
  82 }
  83
  84 /* ------------------------------------------------------------------------- */
  85
  86 static void
  87 arg_off_size(int argc, char *argv[], ulong *off, ulong *size, ulong totsize)
  88 {
  89         *off = 0;
  90         *size = 0;
  91
  92 #if defined(CONFIG_JFFS2_NAND) && defined(CFG_JFFS_CUSTOM_PART)
  93         if (argc >= 1 && strcmp(argv[0], "partition") == 0) {
  94                 int part_num;
  95                 struct part_info *part;
  96                 const char *partstr;
  97
  98                 if (argc >= 2)
  99                         partstr = argv[1];
 100                 else
 101                         partstr = getenv("partition");
 102
 103                 if (partstr)
 104                         part_num = (int)simple_strtoul(partstr, NULL, 10);
 105                 else
 106                         part_num = 0;
 107
 108                 part = jffs2_part_info(part_num);
 109                 if (part == NULL) {
 110                         printf("\nInvalid partition %d\n", part_num);
 111                         return;
 112                 }
 113                 *size = part->size;
 114                 *off = (ulong)part->offset;
 115         } else
 116 #endif
 117         {
 118                 if (argc >= 1)
 119                         *off = (ulong)simple_strtoul(argv[0], NULL, 16);
 120                 else
 121                         *off = 0;
 122
 123                 if (argc >= 2)
 124                         *size = (ulong)simple_strtoul(argv[1], NULL, 16);
 125                 else
 126                         *size = totsize - *off;
 127
 128         }
 129
 130 }
 131
 132 int do_nand(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
 133 {
 134         int i, dev, ret;
 135         ulong addr, off, size;
 136         char *cmd, *s;
 137         nand_info_t *nand;
 138         int quiet = 0;
 139         const char *quiet_str = getenv("quiet");
 140
 141         /* at least two arguments please */
 142         if (argc < 2)
 143                 goto usage;
 144
 145         if (quiet_str)
 146                 quiet = simple_strtoul(quiet_str, NULL, 0) != 0;
 147
 148         cmd = argv[1];
 149
 150         if (strcmp(cmd, "info") == 0) {
 151
 152                 putc('\n');
 153                 for (i = 0; i < CFG_MAX_NAND_DEVICE; i++) {
 154                         if (nand_info[i].name)
 155                                 printf("Device %d: %s, sector size %lu KiB\n",
 156                                         i, nand_info[i].name,
 157                                         nand_info[i].erasesize >> 10);
 158                 }
 159                 return 0;
 160         }
 161
 162         if (strcmp(cmd, "device") == 0) {
 163
 164                 if (argc < 3) {
 165                         if ((nand_curr_device < 0) ||
 166                             (nand_curr_device >= CFG_MAX_NAND_DEVICE))
 167                                 puts("\nno devices available\n");
 168                         else
 169                                 printf("\nDevice %d: %s\n", nand_curr_device,
 170                                         nand_info[nand_curr_device].name);
 171                         return 0;
 172                 }
 173                 dev = (int)simple_strtoul(argv[2], NULL, 10);
 174                 if (dev < 0 || dev >= CFG_MAX_NAND_DEVICE || !nand_info[dev].name) {
 175                         puts("No such device\n");
 176                         return 1;
 177                 }
 178                 printf("Device %d: %s", dev, nand_info[dev].name);
 179                 puts("... is now current device\n");
 180                 nand_curr_device = dev;
 181                 return 0;
 182         }
 183
 184         if (strcmp(cmd, "bad") != 0 && strcmp(cmd, "erase") != 0 &&
 185             strncmp(cmd, "dump", 4) != 0 &&
 186             strncmp(cmd, "read", 4) != 0 && strncmp(cmd, "write", 5) != 0 &&
 187             strcmp(cmd, "scrub") != 0 && strcmp(cmd, "markbad") != 0 &&
 188             strcmp(cmd, "biterr") != 0 &&
 189             strcmp(cmd, "lock") != 0 && strcmp(cmd, "unlock") != 0 )
 190                 goto usage;
 191
 192         /* the following commands operate on the current device */
 193         if (nand_curr_device < 0 || nand_curr_device >= CFG_MAX_NAND_DEVICE ||
 194             !nand_info[nand_curr_device].name) {
 195                 puts("\nno devices available\n");
 196                 return 1;
 197         }
 198         nand = &nand_info[nand_curr_device];
 199
 200         if (strcmp(cmd, "bad") == 0) {
 201                 printf("\nDevice %d bad blocks:\n", nand_curr_device);
 202                 for (off = 0; off < nand->size; off += nand->erasesize)
 203                         if (nand_block_isbad(nand, off))
 204                                 printf("  %08x\n", off);
 205                 return 0;
 206         }
 207
 208         if (strcmp(cmd, "erase") == 0 || strcmp(cmd, "scrub") == 0) {
 209                 nand_erase_options_t opts;
 210                 int clean = argc >= 3 && !strcmp("clean", argv[2]);
 211                 int rest_argc = argc - 2;
 212                 char **rest_argv = argv + 2;
 213                 int scrub = !strcmp(cmd, "scrub");
 214
 215                 if (clean) {
 216                         rest_argc--;
 217                         rest_argv++;
 218                 }
 219
 220                 if (rest_argc == 0) {
 221
 222                         printf("\nNAND %s: device %d whole chip\n",
 223                                cmd,
 224                                nand_curr_device);
 225
 226                         off = size = 0;
 227                 } else {
 228                         arg_off_size(rest_argc, rest_argv, &off, &size,
 229                                      nand->size);
 230
 231                         if (off == 0 && size == 0)
 232                                 return 1;
 233
 234                         printf("\nNAND %s: device %d offset 0x%x, size 0x%x\n",
 235                                cmd, nand_curr_device, off, size);
 236                 }
 237
 238                 memset(&opts, 0, sizeof(opts));
 239                 opts.offset = off;
 240                 opts.length = size;
 241                 opts.jffs2  = clean;
 242                 opts.quiet  = quiet;
 243
 244                 if (scrub) {
 245                         printf("Warning: "
 246                                "scrub option will erase all factory set "
 247                                "bad blocks!\n"
 248                                "         "
 249                                "There is no reliable way to recover them.\n"
 250                                "         "
 251                                "Use this command only for testing purposes "
 252                                "if you\n"
 253                                "         "
 254                                "are shure of what you are doing!\n"
 255                                "\nReally scrub this NAND flash? <y/N>\n"
 256                                 );
 257
 258                         if (getc() == 'y' && getc() == '\r') {
 259                                 opts.scrub = 1;
 260                         } else {
 261                                 printf("scrub aborted\n");
 262                                 return -1;
 263                         }
 264                 }
 265                 ret = nand_erase_opts(nand, &opts);
 266                 printf("%s\n", ret ? "ERROR" : "OK");
 267
 268                 return ret == 0 ? 0 : 1;
 269         }
 270
 271         if (strncmp(cmd, "dump", 4) == 0) {
 272                 if (argc < 3)
 273                         goto usage;
 274
 275                 s = strchr(cmd, '.');
 276                 off = (int)simple_strtoul(argv[2], NULL, 16);
 277
 278                 if (s != NULL && strcmp(s, ".oob") == 0)
 279                         ret = nand_dump_oob(nand, off);
 280                 else
 281                         ret = nand_dump(nand, off);
 282
 283                 return ret == 0 ? 1 : 0;
 284
 285         }
 286
 287         /* read write */
 288         if (strncmp(cmd, "read", 4) == 0 || strncmp(cmd, "write", 5) == 0) {
 289                 int read;
 290
 291                 if (argc < 4)
 292                         goto usage;
 293
 294                 addr = (ulong)simple_strtoul(argv[2], NULL, 16);
 295
 296                 arg_off_size(argc - 3, argv + 3, &off, &size, nand->size);
 297                 if (off == 0 && size == 0)
 298                         return 1;
 299
 300                 read = strncmp(cmd, "read", 4) == 0; /* 1 = read, 0 = write */
 301                 printf("\nNAND %s: device %d offset %u, size %u ... ",
 302                        read ? "read" : "write", nand_curr_device, off, size);
 303
 304                 s = strchr(cmd, '.');
 305                 if (s != NULL &&
 306                     (!strcmp(s, ".jffs2") || !strcmp(s, ".e") || !strcmp(s, ".i"))) {
 307                         if (read) {
 308                                 /* read */
 309                                 nand_read_options_t opts;
 310                                 memset(&opts, 0, sizeof(opts));
 311                                 opts.buffer     = (u_char*) addr;
 312                                 opts.length     = size;
 313                                 opts.offset     = off;
 314                                 opts.quiet      = quiet;
 315                                 ret = nand_read_opts(nand, &opts);
 316                         } else {
 317                                 /* write */
 318                                 nand_write_options_t opts;
 319                                 memset(&opts, 0, sizeof(opts));
 320                                 opts.buffer     = (u_char*) addr;
 321                                 opts.length     = size;
 322                                 opts.offset     = off;
 323                                 /* opts.forcejffs2 = 1; */
 324                                 opts.pad        = 1;
 325                                 opts.blockalign = 1;
 326                                 opts.quiet      = quiet;
 327                                 ret = nand_write_opts(nand, &opts);
 328                         }
 329                         printf("%s\n", ret ? "ERROR" : "OK");
 330                         return ret == 0 ? 0 : 1;
 331                 }
 332
 333                 if (read)
 334                         ret = nand_read(nand, off, &size, (u_char *)addr);
 335                 else
 336                         ret = nand_write(nand, off, &size, (u_char *)addr);
 337
 338                 printf(" %d bytes %s: %s\n", size,
 339                        read ? "read" : "written", ret ? "ERROR" : "OK");
 340
 341                 return ret == 0 ? 0 : 1;
 342         }
 343
 344         /* 2006-09-28 gc: implement missing commands */
 345         if (strcmp(cmd, "markbad") == 0) {
 346                 addr = (ulong)simple_strtoul(argv[2], NULL, 16);
 347
 348                 int ret = nand->block_markbad(nand, addr);
 349                 if (ret == 0) {
 350                         printf("block 0x%08lx successfully marked as bad\n",
 351                                (ulong) addr);
 352                         return 0;
 353                 } else {
 354                         printf("block 0x%08lx NOT marked as bad! ERROR %d\n",
 355                                (ulong) addr, ret);
 356                 }
 357                 return 1;
 358         }
 359         if (strcmp(cmd, "biterr") == 0) {
 360                 /* todo */
 361                 return 1;
 362         }
 363
 364         if (strcmp(cmd, "lock") == 0) {
 365                 int tight  = 0;
 366                 int status = 0;
 367                 if (argc == 3) {
 368                         if (!strcmp("tight", argv[2]))
 369                                 tight = 1;
 370                         if (!strcmp("status", argv[2]))
 371                                 status = 1;
 372                 }
 373
 374                 if (status) {
 375                         ulong block_start = 0;
 376                         ulong off;
 377                         int last_status = -1;
 378
 379                         struct nand_chip *nand_chip = nand->priv;
 380                         /* check the WP bit */
 381                         nand_chip->cmdfunc (nand, NAND_CMD_STATUS, -1, -1);
 382                         printf("device is %swrite protected\n",
 383                                (nand_chip->read_byte(nand) & 0x80 ?
 384                                 "NOT " : "" ) );
 385
 386                         for (off = 0; off < nand->size; off += nand->oobblock) {
 387                                 int s = nand_get_lock_status(nand, off);
 388
 389                                 /* print message only if status has changed
 390                                  * or at end of chip
 391                                  */
 392                                 if (off == nand->size - nand->oobblock
 393                                     || (s != last_status && off != 0))  {
 394
 395                                         printf("%08x - %08x: %8d pages %s%s%s\n",
 396                                                block_start,
 397                                                off-1,
 398                                                (off-block_start)/nand->oobblock,
 399                                                ((last_status & NAND_LOCK_STATUS_TIGHT) ? "TIGHT " : ""),
 400                                                ((last_status & NAND_LOCK_STATUS_LOCK) ? "LOCK " : ""),
 401                                                ((last_status & NAND_LOCK_STATUS_UNLOCK) ? "UNLOCK " : ""));
 402                                 }
 403
 404                                 last_status = s;
 405                        }
 406                 } else {
 407                         if (!nand_lock(nand, tight)) {
 408                                 printf ("NAND flash successfully locked\n");
 409                         } else {
 410                                 printf ("Error locking NAND flash. \n");
 411                                 return 1;
 412                         }
 413                 }
 414                 return 0;
 415         }
 416
 417         if (strcmp(cmd, "unlock") == 0) {
 418                 if (argc == 2) {
 419                         off = 0;
 420                         size = nand->size;
 421                 } else {
 422                         arg_off_size(argc - 2, argv + 2, &off, &size,
 423                                      nand->size);
 424                 }
 425
 426                 if (!nand_unlock(nand, off, size)) {
 427                         printf("NAND flash successfully unlocked\n");
 428                 } else {
 429                         printf("Error unlocking NAND flash. "
 430                                "Write and erase will probably fail\n");
 431                         return 1;
 432                 }
 433                 return 0;
 434         }
 435
 436 usage:
 437         printf("Usage:\n%s\n", cmdtp->usage);
 438         return 1;
 439 }
 440
 441 U_BOOT_CMD(nand, 5, 1, do_nand,
 442         "nand    - NAND sub-system\n",
 443         "info                  - show available NAND devices\n"
 444         "nand device [dev]     - show or set current device\n"
 445         "nand read[.jffs2]     - addr off size\n"
 446         "nand write[.jffs2]    - addr off size - read/write `size' bytes starting\n"
 447         "    at offset `off' to/from memory address `addr'\n"
 448         "nand erase [clean] [off size] - erase `size' bytes from\n"
 449         "    offset `off' (entire device if not specified)\n"
 450         "nand bad - show bad blocks\n"
 451         "nand dump[.oob] off - dump page\n"
 452         "nand scrub - really clean NAND erasing bad blocks (UNSAFE)\n"
 453         "nand markbad off - mark bad block at offset (UNSAFE)\n"
 454         "nand biterr off - make a bit error at offset (UNSAFE)\n"
 455         "nand lock [tight] [status] - bring nand to lock state or display locked pages\n"
 456         "nand unlock [offset] [size] - unlock section\n");
 457
 458 int do_nandboot(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
 459 {
 460         char *boot_device = NULL;
 461         char *ep;
 462         int dev;
 463         int r;
 464         ulong addr, cnt, offset = 0;
 465         image_header_t *hdr;
 466         nand_info_t *nand;
 467
 468         switch (argc) {
 469         case 1:
 470                 addr = CFG_LOAD_ADDR;
 471                 boot_device = getenv("bootdevice");
 472                 break;
 473         case 2:
 474                 addr = simple_strtoul(argv[1], NULL, 16);
 475                 boot_device = getenv("bootdevice");
 476                 break;
 477         case 3:
 478                 addr = simple_strtoul(argv[1], NULL, 16);
 479                 boot_device = argv[2];
 480                 break;
 481         case 4:
 482                 addr = simple_strtoul(argv[1], NULL, 16);
 483                 boot_device = argv[2];
 484                 offset = simple_strtoul(argv[3], NULL, 16);
 485                 break;
 486         default:
 487                 printf("Usage:\n%s\n", cmdtp->usage);
 488                 SHOW_BOOT_PROGRESS(-1);
 489                 return 1;
 490         }
 491
 492         if (!boot_device) {
 493                 puts("\n** No boot device **\n");
 494                 SHOW_BOOT_PROGRESS(-1);
 495                 return 1;
 496         }
 497
 498         dev = simple_strtoul(boot_device, &ep, 16);
 499
 500         if (dev < 0 || dev >= CFG_MAX_NAND_DEVICE || !nand_info[dev].name) {
 501                 printf("\n** Device %d not available\n", dev);
 502                 SHOW_BOOT_PROGRESS(-1);
 503                 return 1;
 504         }
 505
 506         nand = &nand_info[dev];
 507         printf("\nLoading from device %d: %s (offset 0x%lx)\n",
 508                dev, nand->name, offset);
 509
 510         cnt = nand->oobblock;
 511         r = nand_read(nand, offset, &cnt, (u_char *) addr);
 512         if (r) {
 513                 printf("** Read error on %d\n", dev);
 514                 SHOW_BOOT_PROGRESS(-1);
 515                 return 1;
 516         }
 517
 518         hdr = (image_header_t *) addr;
 519
 520         if (ntohl(hdr->ih_magic) != IH_MAGIC) {
 521                 printf("\n** Bad Magic Number 0x%x **\n", hdr->ih_magic);
 522                 SHOW_BOOT_PROGRESS(-1);
 523                 return 1;
 524         }
 525
 526         print_image_hdr(hdr);
 527
 528         cnt = (ntohl(hdr->ih_size) + sizeof (image_header_t));
 529
 530         r = nand_read(nand, offset, &cnt, (u_char *) addr);
 531         if (r) {
 532                 printf("** Read error on %d\n", dev);
 533                 SHOW_BOOT_PROGRESS(-1);
 534                 return 1;
 535         }
 536
 537         /* Loading ok, update default load address */
 538
 539         load_addr = addr;
 540
 541         /* Check if we should attempt an auto-start */
 542         if (((ep = getenv("autostart")) != NULL) && (strcmp(ep, "yes") == 0)) {
 543                 char *local_args[2];
 544                 extern int do_bootm(cmd_tbl_t *, int, int, char *[]);
 545
 546                 local_args[0] = argv[0];
 547                 local_args[1] = NULL;
 548
 549                 printf("Automatic boot of image at addr 0x%08lx ...\n", addr);
 550
 551                 do_bootm(cmdtp, 0, 1, local_args);
 552                 return 1;
 553         }
 554         return 0;
 555 }
 556
 557 U_BOOT_CMD(nboot, 4, 1, do_nandboot,
 558         "nboot   - boot from NAND device\n", "loadAddr dev\n");
 559
 560
 561 #endif                          /* (CONFIG_COMMANDS & CFG_CMD_NAND) */
 562
 563 #else /* CFG_NAND_LEGACY */
 564 /*
 565  *
 566  * Legacy NAND support - to be phased out
 567  *
 568  */
 569 #include <command.h>
 570 #include <malloc.h>
 571 #include <asm/io.h>
 572 #include <watchdog.h>
 573
 574 #ifdef CONFIG_SHOW_BOOT_PROGRESS
 575 # include <status_led.h>
 576 # define SHOW_BOOT_PROGRESS(arg)        show_boot_progress(arg)
 577 #else
 578 # define SHOW_BOOT_PROGRESS(arg)
 579 #endif
 580
 581 #if (CONFIG_COMMANDS & CFG_CMD_NAND)
 582 #include <linux/mtd/nand_legacy.h>
 583 #if 0
 584 #include <linux/mtd/nand_ids.h>
 585 #include <jffs2/jffs2.h>
 586 #endif
 587
 588 #ifdef CONFIG_OMAP1510
 589 void archflashwp(void *archdata, int wp);
 590 #endif
 591
 592 #define ROUND_DOWN(value,boundary)      ((value) & (~((boundary)-1)))
 593
 594 #undef  NAND_DEBUG
 595 #undef  PSYCHO_DEBUG
 596
 597 /* ****************** WARNING *********************
 598  * When ALLOW_ERASE_BAD_DEBUG is non-zero the erase command will
 599  * erase (or at least attempt to erase) blocks that are marked
 600  * bad. This can be very handy if you are _sure_ that the block
 601  * is OK, say because you marked a good block bad to test bad
 602  * block handling and you are done testing, or if you have
 603  * accidentally marked blocks bad.
 604  *
 605  * Erasing factory marked bad blocks is a _bad_ idea. If the
 606  * erase succeeds there is no reliable way to find them again,
 607  * and attempting to program or erase bad blocks can affect
 608  * the data in _other_ (good) blocks.
 609  */
 610 #define  ALLOW_ERASE_BAD_DEBUG 0
 611
 612 #define CONFIG_MTD_NAND_ECC  /* enable ECC */
 613 #define CONFIG_MTD_NAND_ECC_JFFS2
 614
 615 /* bits for nand_legacy_rw() `cmd'; or together as needed */
 616 #define NANDRW_READ     0x01
 617 #define NANDRW_WRITE    0x00
 618 #define NANDRW_JFFS2    0x02
 619 #define NANDRW_JFFS2_SKIP       0x04
 620
 621 /*
 622  * Imports from nand_legacy.c
 623  */
 624 extern struct nand_chip nand_dev_desc[CFG_MAX_NAND_DEVICE];
 625 extern int curr_device;
 626 extern int nand_legacy_erase(struct nand_chip *nand, size_t ofs,
 627                             size_t len, int clean);
 628 extern int nand_legacy_rw(struct nand_chip *nand, int cmd, size_t start,
 629                          size_t len, size_t *retlen, u_char *buf);
 630 extern void nand_print(struct nand_chip *nand);
 631 extern void nand_print_bad(struct nand_chip *nand);
 632 extern int nand_read_oob(struct nand_chip *nand, size_t ofs,
 633                                size_t len, size_t *retlen, u_char *buf);
 634 extern int nand_write_oob(struct nand_chip *nand, size_t ofs,
 635                                 size_t len, size_t *retlen, const u_char *buf);
 636
 637
 638 int do_nand (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 639 {
 640     int rcode = 0;
 641
 642     switch (argc) {
 643     case 0:
 644     case 1:
 645         printf ("Usage:\n%s\n", cmdtp->usage);
 646         return 1;
 647     case 2:
 648         if (strcmp(argv[1],"info") == 0) {
 649                 int i;
 650
 651                 putc ('\n');
 652
 653                 for (i=0; i<CFG_MAX_NAND_DEVICE; ++i) {
 654                         if(nand_dev_desc[i].ChipID == NAND_ChipID_UNKNOWN)
 655                                 continue; /* list only known devices */
 656                         printf ("Device %d: ", i);
 657                         nand_print(&nand_dev_desc[i]);
 658                 }
 659                 return 0;
 660
 661         } else if (strcmp(argv[1],"device") == 0) {
 662                 if ((curr_device < 0) || (curr_device >= CFG_MAX_NAND_DEVICE)) {
 663                         puts ("\nno devices available\n");
 664                         return 1;
 665                 }
 666                 printf ("\nDevice %d: ", curr_device);
 667                 nand_print(&nand_dev_desc[curr_device]);
 668                 return 0;
 669
 670         } else if (strcmp(argv[1],"bad") == 0) {
 671                 if ((curr_device < 0) || (curr_device >= CFG_MAX_NAND_DEVICE)) {
 672                         puts ("\nno devices available\n");
 673                         return 1;
 674                 }
 675                 printf ("\nDevice %d bad blocks:\n", curr_device);
 676                 nand_print_bad(&nand_dev_desc[curr_device]);
 677                 return 0;
 678
 679         }
 680         printf ("Usage:\n%s\n", cmdtp->usage);
 681         return 1;
 682     case 3:
 683         if (strcmp(argv[1],"device") == 0) {
 684                 int dev = (int)simple_strtoul(argv[2], NULL, 10);
 685
 686                 printf ("\nDevice %d: ", dev);
 687                 if (dev >= CFG_MAX_NAND_DEVICE) {
 688                         puts ("unknown device\n");
 689                         return 1;
 690                 }
 691                 nand_print(&nand_dev_desc[dev]);
 692                 /*nand_print (dev);*/
 693
 694                 if (nand_dev_desc[dev].ChipID == NAND_ChipID_UNKNOWN) {
 695                         return 1;
 696                 }
 697
 698                 curr_device = dev;
 699
 700                 puts ("... is now current device\n");
 701
 702                 return 0;
 703         }
 704         else if (strcmp(argv[1],"erase") == 0 && strcmp(argv[2], "clean") == 0) {
 705                 struct nand_chip* nand = &nand_dev_desc[curr_device];
 706                 ulong off = 0;
 707                 ulong size = nand->totlen;
 708                 int ret;
 709
 710                 printf ("\nNAND erase: device %d offset %ld, size %ld ... ",
 711                         curr_device, off, size);
 712
 713                 ret = nand_legacy_erase (nand, off, size, 1);
 714
 715                 printf("%s\n", ret ? "ERROR" : "OK");
 716
 717                 return ret;
 718         }
 719
 720         printf ("Usage:\n%s\n", cmdtp->usage);
 721         return 1;
 722     default:
 723         /* at least 4 args */
 724
 725         if (strncmp(argv[1], "read", 4) == 0 ||
 726             strncmp(argv[1], "write", 5) == 0) {
 727                 ulong addr = simple_strtoul(argv[2], NULL, 16);
 728                 ulong off  = simple_strtoul(argv[3], NULL, 16);
 729                 ulong size = simple_strtoul(argv[4], NULL, 16);
 730                 int cmd    = (strncmp(argv[1], "read", 4) == 0) ?
 731                                 NANDRW_READ : NANDRW_WRITE;
 732                 int ret, total;
 733                 char* cmdtail = strchr(argv[1], '.');
 734
 735                 if (cmdtail && !strncmp(cmdtail, ".oob", 2)) {
 736                         /* read out-of-band data */
 737                         if (cmd & NANDRW_READ) {
 738                                 ret = nand_read_oob(nand_dev_desc + curr_device,
 739                                                     off, size, (size_t *)&total,
 740                                                     (u_char*)addr);
 741                         }
 742                         else {
 743                                 ret = nand_write_oob(nand_dev_desc + curr_device,
 744                                                      off, size, (size_t *)&total,
 745                                                      (u_char*)addr);
 746                         }
 747                         return ret;
 748                 }
 749                 else if (cmdtail && !strncmp(cmdtail, ".jffs2", 2))
 750                         cmd |= NANDRW_JFFS2;    /* skip bad blocks */
 751                 else if (cmdtail && !strncmp(cmdtail, ".jffs2s", 2)) {
 752                         cmd |= NANDRW_JFFS2;    /* skip bad blocks (on read too) */
 753                         if (cmd & NANDRW_READ)
 754                                 cmd |= NANDRW_JFFS2_SKIP;       /* skip bad blocks (on read too) */
 755                 }
 756 #ifdef SXNI855T
 757                 /* need ".e" same as ".j" for compatibility with older units */
 758                 else if (cmdtail && !strcmp(cmdtail, ".e"))
 759                         cmd |= NANDRW_JFFS2;    /* skip bad blocks */
 760 #endif
 761 #ifdef CFG_NAND_SKIP_BAD_DOT_I
 762                 /* need ".i" same as ".jffs2s" for compatibility with older units (esd) */
 763                 /* ".i" for image -> read skips bad block (no 0xff) */
 764                 else if (cmdtail && !strcmp(cmdtail, ".i")) {
 765                         cmd |= NANDRW_JFFS2;    /* skip bad blocks (on read too) */
 766                         if (cmd & NANDRW_READ)
 767                                 cmd |= NANDRW_JFFS2_SKIP;       /* skip bad blocks (on read too) */
 768                 }
 769 #endif /* CFG_NAND_SKIP_BAD_DOT_I */
 770                 else if (cmdtail) {
 771                         printf ("Usage:\n%s\n", cmdtp->usage);
 772                         return 1;
 773                 }
 774
 775                 printf ("\nNAND %s: device %d offset %ld, size %ld ...\n",
 776                         (cmd & NANDRW_READ) ? "read" : "write",
 777                         curr_device, off, size);
 778
 779                 ret = nand_legacy_rw(nand_dev_desc + curr_device, cmd, off, size,
 780                              (size_t *)&total, (u_char*)addr);
 781
 782                 printf (" %d bytes %s: %s\n", total,
 783                         (cmd & NANDRW_READ) ? "read" : "written",
 784                         ret ? "ERROR" : "OK");
 785
 786                 return ret;
 787         } else if (strcmp(argv[1],"erase") == 0 &&
 788                    (argc == 4 || strcmp("clean", argv[2]) == 0)) {
 789                 int clean = argc == 5;
 790                 ulong off = simple_strtoul(argv[2 + clean], NULL, 16);
 791                 ulong size = simple_strtoul(argv[3 + clean], NULL, 16);
 792                 int ret;
 793
 794                 printf ("\nNAND erase: device %d offset %ld, size %ld ...\n",
 795                         curr_device, off, size);
 796
 797                 ret = nand_legacy_erase (nand_dev_desc + curr_device,
 798                                         off, size, clean);
 799
 800                 printf("%s\n", ret ? "ERROR" : "OK");
 801
 802                 return ret;
 803         } else {
 804                 printf ("Usage:\n%s\n", cmdtp->usage);
 805                 rcode = 1;
 806         }
 807
 808         return rcode;
 809     }
 810 }
 811
 812 U_BOOT_CMD(
 813         nand,   5,      1,      do_nand,
 814         "nand    - legacy NAND sub-system\n",
 815         "info  - show available NAND devices\n"
 816         "nand device [dev] - show or set current device\n"
 817         "nand read[.jffs2[s]]  addr off size\n"
 818         "nand write[.jffs2] addr off size - read/write `size' bytes starting\n"
 819         "    at offset `off' to/from memory address `addr'\n"
 820         "nand erase [clean] [off size] - erase `size' bytes from\n"
 821         "    offset `off' (entire device if not specified)\n"
 822         "nand bad - show bad blocks\n"
 823         "nand read.oob addr off size - read out-of-band data\n"
 824         "nand write.oob addr off size - read out-of-band data\n"
 825 );
 826
 827 int do_nandboot (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 828 {
 829         char *boot_device = NULL;
 830         char *ep;
 831         int dev;
 832         ulong cnt;
 833         ulong addr;
 834         ulong offset = 0;
 835         image_header_t *hdr;
 836         int rcode = 0;
 837         switch (argc) {
 838         case 1:
 839                 addr = CFG_LOAD_ADDR;
 840                 boot_device = getenv ("bootdevice");
 841                 break;
 842         case 2:
 843                 addr = simple_strtoul(argv[1], NULL, 16);
 844                 boot_device = getenv ("bootdevice");
 845                 break;
 846         case 3:
 847                 addr = simple_strtoul(argv[1], NULL, 16);
 848                 boot_device = argv[2];
 849                 break;
 850         case 4:
 851                 addr = simple_strtoul(argv[1], NULL, 16);
 852                 boot_device = argv[2];
 853                 offset = simple_strtoul(argv[3], NULL, 16);
 854                 break;
 855         default:
 856                 printf ("Usage:\n%s\n", cmdtp->usage);
 857                 SHOW_BOOT_PROGRESS (-1);
 858                 return 1;
 859         }
 860
 861         if (!boot_device) {
 862                 puts ("\n** No boot device **\n");
 863                 SHOW_BOOT_PROGRESS (-1);
 864                 return 1;
 865         }
 866
 867         dev = simple_strtoul(boot_device, &ep, 16);
 868
 869         if ((dev >= CFG_MAX_NAND_DEVICE) ||
 870             (nand_dev_desc[dev].ChipID == NAND_ChipID_UNKNOWN)) {
 871                 printf ("\n** Device %d not available\n", dev);
 872                 SHOW_BOOT_PROGRESS (-1);
 873                 return 1;
 874         }
 875
 876         printf ("\nLoading from device %d: %s at 0x%lx (offset 0x%lx)\n",
 877                 dev, nand_dev_desc[dev].name, nand_dev_desc[dev].IO_ADDR,
 878                 offset);
 879
 880         if (nand_legacy_rw (nand_dev_desc + dev, NANDRW_READ, offset,
 881                         SECTORSIZE, NULL, (u_char *)addr)) {
 882                 printf ("** Read error on %d\n", dev);
 883                 SHOW_BOOT_PROGRESS (-1);
 884                 return 1;
 885         }
 886
 887         hdr = (image_header_t *)addr;
 888
 889         if (ntohl(hdr->ih_magic) == IH_MAGIC) {
 890
 891                 print_image_hdr (hdr);
 892
 893                 cnt = (ntohl(hdr->ih_size) + sizeof(image_header_t));
 894                 cnt -= SECTORSIZE;
 895         } else {
 896                 printf ("\n** Bad Magic Number 0x%x **\n", ntohl(hdr->ih_magic));
 897                 SHOW_BOOT_PROGRESS (-1);
 898                 return 1;
 899         }
 900
 901         if (nand_legacy_rw (nand_dev_desc + dev, NANDRW_READ,
 902                         offset + SECTORSIZE, cnt, NULL,
 903                         (u_char *)(addr+SECTORSIZE))) {
 904                 printf ("** Read error on %d\n", dev);
 905                 SHOW_BOOT_PROGRESS (-1);
 906                 return 1;
 907         }
 908
 909         /* Loading ok, update default load address */
 910
 911         load_addr = addr;
 912
 913         /* Check if we should attempt an auto-start */
 914         if (((ep = getenv("autostart")) != NULL) && (strcmp(ep,"yes") == 0)) {
 915                 char *local_args[2];
 916                 extern int do_bootm (cmd_tbl_t *, int, int, char *[]);
 917
 918                 local_args[0] = argv[0];
 919                 local_args[1] = NULL;
 920
 921                 printf ("Automatic boot of image at addr 0x%08lx ...\n", addr);
 922
 923                 do_bootm (cmdtp, 0, 1, local_args);
 924                 rcode = 1;
 925         }
 926         return rcode;
 927 }
 928
 929 U_BOOT_CMD(
 930         nboot,  4,      1,      do_nandboot,
 931         "nboot   - boot from NAND device\n",
 932         "loadAddr dev\n"
 933 );
 934
 935 #endif /* (CONFIG_COMMANDS & CFG_CMD_NAND) */
 936
 937 #endif /* CFG_NAND_LEGACY */