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
 182 #ifdef CFG_NAND_SELECT_DEVICE
 183                 /*
 184                  * Select the chip in the board/cpu specific driver
 185                  */
 186                 board_nand_select_device(nand_info[dev].priv, dev);
 187 #endif
 188
 189                 return 0;
 190         }
 191
 192         if (strcmp(cmd, "bad") != 0 && strcmp(cmd, "erase") != 0 &&
 193             strncmp(cmd, "dump", 4) != 0 &&
 194             strncmp(cmd, "read", 4) != 0 && strncmp(cmd, "write", 5) != 0 &&
 195             strcmp(cmd, "scrub") != 0 && strcmp(cmd, "markbad") != 0 &&
 196             strcmp(cmd, "biterr") != 0 &&
 197             strcmp(cmd, "lock") != 0 && strcmp(cmd, "unlock") != 0 )
 198                 goto usage;
 199
 200         /* the following commands operate on the current device */
 201         if (nand_curr_device < 0 || nand_curr_device >= CFG_MAX_NAND_DEVICE ||
 202             !nand_info[nand_curr_device].name) {
 203                 puts("\nno devices available\n");
 204                 return 1;
 205         }
 206         nand = &nand_info[nand_curr_device];
 207
 208         if (strcmp(cmd, "bad") == 0) {
 209                 printf("\nDevice %d bad blocks:\n", nand_curr_device);
 210                 for (off = 0; off < nand->size; off += nand->erasesize)
 211                         if (nand_block_isbad(nand, off))
 212                                 printf("  %08x\n", off);
 213                 return 0;
 214         }
 215
 216         if (strcmp(cmd, "erase") == 0 || strcmp(cmd, "scrub") == 0) {
 217                 nand_erase_options_t opts;
 218                 int clean = argc >= 3 && !strcmp("clean", argv[2]);
 219                 int rest_argc = argc - 2;
 220                 char **rest_argv = argv + 2;
 221                 int scrub = !strcmp(cmd, "scrub");
 222
 223                 if (clean) {
 224                         rest_argc--;
 225                         rest_argv++;
 226                 }
 227
 228                 if (rest_argc == 0) {
 229
 230                         printf("\nNAND %s: device %d whole chip\n",
 231                                cmd,
 232                                nand_curr_device);
 233
 234                         off = size = 0;
 235                 } else {
 236                         arg_off_size(rest_argc, rest_argv, &off, &size,
 237                                      nand->size);
 238
 239                         if (off == 0 && size == 0)
 240                                 return 1;
 241
 242                         printf("\nNAND %s: device %d offset 0x%x, size 0x%x\n",
 243                                cmd, nand_curr_device, off, size);
 244                 }
 245
 246                 memset(&opts, 0, sizeof(opts));
 247                 opts.offset = off;
 248                 opts.length = size;
 249                 opts.jffs2  = clean;
 250                 opts.quiet  = quiet;
 251
 252                 if (scrub) {
 253                         printf("Warning: "
 254                                "scrub option will erase all factory set "
 255                                "bad blocks!\n"
 256                                "         "
 257                                "There is no reliable way to recover them.\n"
 258                                "         "
 259                                "Use this command only for testing purposes "
 260                                "if you\n"
 261                                "         "
 262                                "are sure of what you are doing!\n"
 263                                "\nReally scrub this NAND flash? <y/N>\n"
 264                                 );
 265
 266                         if (getc() == 'y' && getc() == '\r') {
 267                                 opts.scrub = 1;
 268                         } else {
 269                                 printf("scrub aborted\n");
 270                                 return -1;
 271                         }
 272                 }
 273                 ret = nand_erase_opts(nand, &opts);
 274                 printf("%s\n", ret ? "ERROR" : "OK");
 275
 276                 return ret == 0 ? 0 : 1;
 277         }
 278
 279         if (strncmp(cmd, "dump", 4) == 0) {
 280                 if (argc < 3)
 281                         goto usage;
 282
 283                 s = strchr(cmd, '.');
 284                 off = (int)simple_strtoul(argv[2], NULL, 16);
 285
 286                 if (s != NULL && strcmp(s, ".oob") == 0)
 287                         ret = nand_dump_oob(nand, off);
 288                 else
 289                         ret = nand_dump(nand, off);
 290
 291                 return ret == 0 ? 1 : 0;
 292
 293         }
 294
 295         /* read write */
 296         if (strncmp(cmd, "read", 4) == 0 || strncmp(cmd, "write", 5) == 0) {
 297                 int read;
 298
 299                 if (argc < 4)
 300                         goto usage;
 301
 302                 addr = (ulong)simple_strtoul(argv[2], NULL, 16);
 303
 304                 arg_off_size(argc - 3, argv + 3, &off, &size, nand->size);
 305                 if (off == 0 && size == 0)
 306                         return 1;
 307
 308                 read = strncmp(cmd, "read", 4) == 0; /* 1 = read, 0 = write */
 309                 printf("\nNAND %s: device %d offset %u, size %u ... ",
 310                        read ? "read" : "write", nand_curr_device, off, size);
 311
 312                 s = strchr(cmd, '.');
 313                 if (s != NULL &&
 314                     (!strcmp(s, ".jffs2") || !strcmp(s, ".e") || !strcmp(s, ".i"))) {
 315                         if (read) {
 316                                 /* read */
 317                                 nand_read_options_t opts;
 318                                 memset(&opts, 0, sizeof(opts));
 319                                 opts.buffer     = (u_char*) addr;
 320                                 opts.length     = size;
 321                                 opts.offset     = off;
 322                                 opts.quiet      = quiet;
 323                                 ret = nand_read_opts(nand, &opts);
 324                         } else {
 325                                 /* write */
 326                                 nand_write_options_t opts;
 327                                 memset(&opts, 0, sizeof(opts));
 328                                 opts.buffer     = (u_char*) addr;
 329                                 opts.length     = size;
 330                                 opts.offset     = off;
 331                                 /* opts.forcejffs2 = 1; */
 332                                 opts.pad        = 1;
 333                                 opts.blockalign = 1;
 334                                 opts.quiet      = quiet;
 335                                 ret = nand_write_opts(nand, &opts);
 336                         }
 337                         printf("%s\n", ret ? "ERROR" : "OK");
 338                         return ret == 0 ? 0 : 1;
 339                 }
 340
 341                 if (read)
 342                         ret = nand_read(nand, off, &size, (u_char *)addr);
 343                 else
 344                         ret = nand_write(nand, off, &size, (u_char *)addr);
 345
 346                 printf(" %d bytes %s: %s\n", size,
 347                        read ? "read" : "written", ret ? "ERROR" : "OK");
 348
 349                 return ret == 0 ? 0 : 1;
 350         }
 351
 352         if (strcmp(cmd, "markbad") == 0) {
 353                 addr = (ulong)simple_strtoul(argv[2], NULL, 16);
 354
 355                 int ret = nand->block_markbad(nand, addr);
 356                 if (ret == 0) {
 357                         printf("block 0x%08lx successfully marked as bad\n",
 358                                (ulong) addr);
 359                         return 0;
 360                 } else {
 361                         printf("block 0x%08lx NOT marked as bad! ERROR %d\n",
 362                                (ulong) addr, ret);
 363                 }
 364                 return 1;
 365         }
 366         if (strcmp(cmd, "biterr") == 0) {
 367                 /* todo */
 368                 return 1;
 369         }
 370
 371         if (strcmp(cmd, "lock") == 0) {
 372                 int tight  = 0;
 373                 int status = 0;
 374                 if (argc == 3) {
 375                         if (!strcmp("tight", argv[2]))
 376                                 tight = 1;
 377                         if (!strcmp("status", argv[2]))
 378                                 status = 1;
 379                 }
 380
 381                 if (status) {
 382                         ulong block_start = 0;
 383                         ulong off;
 384                         int last_status = -1;
 385
 386                         struct nand_chip *nand_chip = nand->priv;
 387                         /* check the WP bit */
 388                         nand_chip->cmdfunc (nand, NAND_CMD_STATUS, -1, -1);
 389                         printf("device is %swrite protected\n",
 390                                (nand_chip->read_byte(nand) & 0x80 ?
 391                                 "NOT " : "" ) );
 392
 393                         for (off = 0; off < nand->size; off += nand->oobblock) {
 394                                 int s = nand_get_lock_status(nand, off);
 395
 396                                 /* print message only if status has changed
 397                                  * or at end of chip
 398                                  */
 399                                 if (off == nand->size - nand->oobblock
 400                                     || (s != last_status && off != 0))  {
 401
 402                                         printf("%08x - %08x: %8d pages %s%s%s\n",
 403                                                block_start,
 404                                                off-1,
 405                                                (off-block_start)/nand->oobblock,
 406                                                ((last_status & NAND_LOCK_STATUS_TIGHT) ? "TIGHT " : ""),
 407                                                ((last_status & NAND_LOCK_STATUS_LOCK) ? "LOCK " : ""),
 408                                                ((last_status & NAND_LOCK_STATUS_UNLOCK) ? "UNLOCK " : ""));
 409                                 }
 410
 411                                 last_status = s;
 412                        }
 413                 } else {
 414                         if (!nand_lock(nand, tight)) {
 415                                 printf ("NAND flash successfully locked\n");
 416                         } else {
 417                                 printf ("Error locking NAND flash. \n");
 418                                 return 1;
 419                         }
 420                 }
 421                 return 0;
 422         }
 423
 424         if (strcmp(cmd, "unlock") == 0) {
 425                 if (argc == 2) {
 426                         off = 0;
 427                         size = nand->size;
 428                 } else {
 429                         arg_off_size(argc - 2, argv + 2, &off, &size,
 430                                      nand->size);
 431                 }
 432
 433                 if (!nand_unlock(nand, off, size)) {
 434                         printf("NAND flash successfully unlocked\n");
 435                 } else {
 436                         printf("Error unlocking NAND flash. "
 437                                "Write and erase will probably fail\n");
 438                         return 1;
 439                 }
 440                 return 0;
 441         }
 442
 443 usage:
 444         printf("Usage:\n%s\n", cmdtp->usage);
 445         return 1;
 446 }
 447
 448 U_BOOT_CMD(nand, 5, 1, do_nand,
 449         "nand    - NAND sub-system\n",
 450         "info                  - show available NAND devices\n"
 451         "nand device [dev]     - show or set current device\n"
 452         "nand read[.jffs2]     - addr off size\n"
 453         "nand write[.jffs2]    - addr off size - read/write `size' bytes starting\n"
 454         "    at offset `off' to/from memory address `addr'\n"
 455         "nand erase [clean] [off size] - erase `size' bytes from\n"
 456         "    offset `off' (entire device if not specified)\n"
 457         "nand bad - show bad blocks\n"
 458         "nand dump[.oob] off - dump page\n"
 459         "nand scrub - really clean NAND erasing bad blocks (UNSAFE)\n"
 460         "nand markbad off - mark bad block at offset (UNSAFE)\n"
 461         "nand biterr off - make a bit error at offset (UNSAFE)\n"
 462         "nand lock [tight] [status] - bring nand to lock state or display locked pages\n"
 463         "nand unlock [offset] [size] - unlock section\n");
 464
 465 int do_nandboot(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
 466 {
 467         char *boot_device = NULL;
 468         char *ep;
 469         int dev;
 470         int r;
 471         ulong addr, cnt, offset = 0;
 472         image_header_t *hdr;
 473         nand_info_t *nand;
 474
 475         switch (argc) {
 476         case 1:
 477                 addr = CFG_LOAD_ADDR;
 478                 boot_device = getenv("bootdevice");
 479                 break;
 480         case 2:
 481                 addr = simple_strtoul(argv[1], NULL, 16);
 482                 boot_device = getenv("bootdevice");
 483                 break;
 484         case 3:
 485                 addr = simple_strtoul(argv[1], NULL, 16);
 486                 boot_device = argv[2];
 487                 break;
 488         case 4:
 489                 addr = simple_strtoul(argv[1], NULL, 16);
 490                 boot_device = argv[2];
 491                 offset = simple_strtoul(argv[3], NULL, 16);
 492                 break;
 493         default:
 494                 printf("Usage:\n%s\n", cmdtp->usage);
 495                 SHOW_BOOT_PROGRESS(-1);
 496                 return 1;
 497         }
 498
 499         if (!boot_device) {
 500                 puts("\n** No boot device **\n");
 501                 SHOW_BOOT_PROGRESS(-1);
 502                 return 1;
 503         }
 504
 505         dev = simple_strtoul(boot_device, &ep, 16);
 506
 507         if (dev < 0 || dev >= CFG_MAX_NAND_DEVICE || !nand_info[dev].name) {
 508                 printf("\n** Device %d not available\n", dev);
 509                 SHOW_BOOT_PROGRESS(-1);
 510                 return 1;
 511         }
 512
 513         nand = &nand_info[dev];
 514         printf("\nLoading from device %d: %s (offset 0x%lx)\n",
 515                dev, nand->name, offset);
 516
 517         cnt = nand->oobblock;
 518         r = nand_read(nand, offset, &cnt, (u_char *) addr);
 519         if (r) {
 520                 printf("** Read error on %d\n", dev);
 521                 SHOW_BOOT_PROGRESS(-1);
 522                 return 1;
 523         }
 524
 525         hdr = (image_header_t *) addr;
 526
 527         if (ntohl(hdr->ih_magic) != IH_MAGIC) {
 528                 printf("\n** Bad Magic Number 0x%x **\n", hdr->ih_magic);
 529                 SHOW_BOOT_PROGRESS(-1);
 530                 return 1;
 531         }
 532
 533         print_image_hdr(hdr);
 534
 535         cnt = (ntohl(hdr->ih_size) + sizeof (image_header_t));
 536
 537         r = nand_read(nand, offset, &cnt, (u_char *) addr);
 538         if (r) {
 539                 printf("** Read error on %d\n", dev);
 540                 SHOW_BOOT_PROGRESS(-1);
 541                 return 1;
 542         }
 543
 544         /* Loading ok, update default load address */
 545
 546         load_addr = addr;
 547
 548         /* Check if we should attempt an auto-start */
 549         if (((ep = getenv("autostart")) != NULL) && (strcmp(ep, "yes") == 0)) {
 550                 char *local_args[2];
 551                 extern int do_bootm(cmd_tbl_t *, int, int, char *[]);
 552
 553                 local_args[0] = argv[0];
 554                 local_args[1] = NULL;
 555
 556                 printf("Automatic boot of image at addr 0x%08lx ...\n", addr);
 557
 558                 do_bootm(cmdtp, 0, 1, local_args);
 559                 return 1;
 560         }
 561         return 0;
 562 }
 563
 564 U_BOOT_CMD(nboot, 4, 1, do_nandboot,
 565         "nboot   - boot from NAND device\n", "loadAddr dev\n");
 566
 567
 568 #endif                          /* (CONFIG_COMMANDS & CFG_CMD_NAND) */
 569
 570 #else /* CFG_NAND_LEGACY */
 571 /*
 572  *
 573  * Legacy NAND support - to be phased out
 574  *
 575  */
 576 #include <command.h>
 577 #include <malloc.h>
 578 #include <asm/io.h>
 579 #include <watchdog.h>
 580
 581 #ifdef CONFIG_SHOW_BOOT_PROGRESS
 582 # include <status_led.h>
 583 # define SHOW_BOOT_PROGRESS(arg)        show_boot_progress(arg)
 584 #else
 585 # define SHOW_BOOT_PROGRESS(arg)
 586 #endif
 587
 588 #if (CONFIG_COMMANDS & CFG_CMD_NAND)
 589 #include <linux/mtd/nand_legacy.h>
 590 #if 0
 591 #include <linux/mtd/nand_ids.h>
 592 #include <jffs2/jffs2.h>
 593 #endif
 594
 595 #ifdef CONFIG_OMAP1510
 596 void archflashwp(void *archdata, int wp);
 597 #endif
 598
 599 #define ROUND_DOWN(value,boundary)      ((value) & (~((boundary)-1)))
 600
 601 #undef  NAND_DEBUG
 602 #undef  PSYCHO_DEBUG
 603
 604 /* ****************** WARNING *********************
 605  * When ALLOW_ERASE_BAD_DEBUG is non-zero the erase command will
 606  * erase (or at least attempt to erase) blocks that are marked
 607  * bad. This can be very handy if you are _sure_ that the block
 608  * is OK, say because you marked a good block bad to test bad
 609  * block handling and you are done testing, or if you have
 610  * accidentally marked blocks bad.
 611  *
 612  * Erasing factory marked bad blocks is a _bad_ idea. If the
 613  * erase succeeds there is no reliable way to find them again,
 614  * and attempting to program or erase bad blocks can affect
 615  * the data in _other_ (good) blocks.
 616  */
 617 #define  ALLOW_ERASE_BAD_DEBUG 0
 618
 619 #define CONFIG_MTD_NAND_ECC  /* enable ECC */
 620 #define CONFIG_MTD_NAND_ECC_JFFS2
 621
 622 /* bits for nand_legacy_rw() `cmd'; or together as needed */
 623 #define NANDRW_READ     0x01
 624 #define NANDRW_WRITE    0x00
 625 #define NANDRW_JFFS2    0x02
 626 #define NANDRW_JFFS2_SKIP       0x04
 627
 628 /*
 629  * Imports from nand_legacy.c
 630  */
 631 extern struct nand_chip nand_dev_desc[CFG_MAX_NAND_DEVICE];
 632 extern int curr_device;
 633 extern int nand_legacy_erase(struct nand_chip *nand, size_t ofs,
 634                             size_t len, int clean);
 635 extern int nand_legacy_rw(struct nand_chip *nand, int cmd, size_t start,
 636                          size_t len, size_t *retlen, u_char *buf);
 637 extern void nand_print(struct nand_chip *nand);
 638 extern void nand_print_bad(struct nand_chip *nand);
 639 extern int nand_read_oob(struct nand_chip *nand, size_t ofs,
 640                                size_t len, size_t *retlen, u_char *buf);
 641 extern int nand_write_oob(struct nand_chip *nand, size_t ofs,
 642                                 size_t len, size_t *retlen, const u_char *buf);
 643
 644
 645 int do_nand (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 646 {
 647     int rcode = 0;
 648
 649     switch (argc) {
 650     case 0:
 651     case 1:
 652         printf ("Usage:\n%s\n", cmdtp->usage);
 653         return 1;
 654     case 2:
 655         if (strcmp(argv[1],"info") == 0) {
 656                 int i;
 657
 658                 putc ('\n');
 659
 660                 for (i=0; i<CFG_MAX_NAND_DEVICE; ++i) {
 661                         if(nand_dev_desc[i].ChipID == NAND_ChipID_UNKNOWN)
 662                                 continue; /* list only known devices */
 663                         printf ("Device %d: ", i);
 664                         nand_print(&nand_dev_desc[i]);
 665                 }
 666                 return 0;
 667
 668         } else if (strcmp(argv[1],"device") == 0) {
 669                 if ((curr_device < 0) || (curr_device >= CFG_MAX_NAND_DEVICE)) {
 670                         puts ("\nno devices available\n");
 671                         return 1;
 672                 }
 673                 printf ("\nDevice %d: ", curr_device);
 674                 nand_print(&nand_dev_desc[curr_device]);
 675                 return 0;
 676
 677         } else if (strcmp(argv[1],"bad") == 0) {
 678                 if ((curr_device < 0) || (curr_device >= CFG_MAX_NAND_DEVICE)) {
 679                         puts ("\nno devices available\n");
 680                         return 1;
 681                 }
 682                 printf ("\nDevice %d bad blocks:\n", curr_device);
 683                 nand_print_bad(&nand_dev_desc[curr_device]);
 684                 return 0;
 685
 686         }
 687         printf ("Usage:\n%s\n", cmdtp->usage);
 688         return 1;
 689     case 3:
 690         if (strcmp(argv[1],"device") == 0) {
 691                 int dev = (int)simple_strtoul(argv[2], NULL, 10);
 692
 693                 printf ("\nDevice %d: ", dev);
 694                 if (dev >= CFG_MAX_NAND_DEVICE) {
 695                         puts ("unknown device\n");
 696                         return 1;
 697                 }
 698                 nand_print(&nand_dev_desc[dev]);
 699                 /*nand_print (dev);*/
 700
 701                 if (nand_dev_desc[dev].ChipID == NAND_ChipID_UNKNOWN) {
 702                         return 1;
 703                 }
 704
 705                 curr_device = dev;
 706
 707                 puts ("... is now current device\n");
 708
 709                 return 0;
 710         }
 711         else if (strcmp(argv[1],"erase") == 0 && strcmp(argv[2], "clean") == 0) {
 712                 struct nand_chip* nand = &nand_dev_desc[curr_device];
 713                 ulong off = 0;
 714                 ulong size = nand->totlen;
 715                 int ret;
 716
 717                 printf ("\nNAND erase: device %d offset %ld, size %ld ... ",
 718                         curr_device, off, size);
 719
 720                 ret = nand_legacy_erase (nand, off, size, 1);
 721
 722                 printf("%s\n", ret ? "ERROR" : "OK");
 723
 724                 return ret;
 725         }
 726
 727         printf ("Usage:\n%s\n", cmdtp->usage);
 728         return 1;
 729     default:
 730         /* at least 4 args */
 731
 732         if (strncmp(argv[1], "read", 4) == 0 ||
 733             strncmp(argv[1], "write", 5) == 0) {
 734                 ulong addr = simple_strtoul(argv[2], NULL, 16);
 735                 ulong off  = simple_strtoul(argv[3], NULL, 16);
 736                 ulong size = simple_strtoul(argv[4], NULL, 16);
 737                 int cmd    = (strncmp(argv[1], "read", 4) == 0) ?
 738                                 NANDRW_READ : NANDRW_WRITE;
 739                 int ret, total;
 740                 char* cmdtail = strchr(argv[1], '.');
 741
 742                 if (cmdtail && !strncmp(cmdtail, ".oob", 2)) {
 743                         /* read out-of-band data */
 744                         if (cmd & NANDRW_READ) {
 745                                 ret = nand_read_oob(nand_dev_desc + curr_device,
 746                                                     off, size, (size_t *)&total,
 747                                                     (u_char*)addr);
 748                         }
 749                         else {
 750                                 ret = nand_write_oob(nand_dev_desc + curr_device,
 751                                                      off, size, (size_t *)&total,
 752                                                      (u_char*)addr);
 753                         }
 754                         return ret;
 755                 }
 756                 else if (cmdtail && !strncmp(cmdtail, ".jffs2", 2))
 757                         cmd |= NANDRW_JFFS2;    /* skip bad blocks */
 758                 else if (cmdtail && !strncmp(cmdtail, ".jffs2s", 2)) {
 759                         cmd |= NANDRW_JFFS2;    /* skip bad blocks (on read too) */
 760                         if (cmd & NANDRW_READ)
 761                                 cmd |= NANDRW_JFFS2_SKIP;       /* skip bad blocks (on read too) */
 762                 }
 763 #ifdef SXNI855T
 764                 /* need ".e" same as ".j" for compatibility with older units */
 765                 else if (cmdtail && !strcmp(cmdtail, ".e"))
 766                         cmd |= NANDRW_JFFS2;    /* skip bad blocks */
 767 #endif
 768 #ifdef CFG_NAND_SKIP_BAD_DOT_I
 769                 /* need ".i" same as ".jffs2s" for compatibility with older units (esd) */
 770                 /* ".i" for image -> read skips bad block (no 0xff) */
 771                 else if (cmdtail && !strcmp(cmdtail, ".i")) {
 772                         cmd |= NANDRW_JFFS2;    /* skip bad blocks (on read too) */
 773                         if (cmd & NANDRW_READ)
 774                                 cmd |= NANDRW_JFFS2_SKIP;       /* skip bad blocks (on read too) */
 775                 }
 776 #endif /* CFG_NAND_SKIP_BAD_DOT_I */
 777                 else if (cmdtail) {
 778                         printf ("Usage:\n%s\n", cmdtp->usage);
 779                         return 1;
 780                 }
 781
 782                 printf ("\nNAND %s: device %d offset %ld, size %ld ...\n",
 783                         (cmd & NANDRW_READ) ? "read" : "write",
 784                         curr_device, off, size);
 785
 786                 ret = nand_legacy_rw(nand_dev_desc + curr_device, cmd, off, size,
 787                              (size_t *)&total, (u_char*)addr);
 788
 789                 printf (" %d bytes %s: %s\n", total,
 790                         (cmd & NANDRW_READ) ? "read" : "written",
 791                         ret ? "ERROR" : "OK");
 792
 793                 return ret;
 794         } else if (strcmp(argv[1],"erase") == 0 &&
 795                    (argc == 4 || strcmp("clean", argv[2]) == 0)) {
 796                 int clean = argc == 5;
 797                 ulong off = simple_strtoul(argv[2 + clean], NULL, 16);
 798                 ulong size = simple_strtoul(argv[3 + clean], NULL, 16);
 799                 int ret;
 800
 801                 printf ("\nNAND erase: device %d offset %ld, size %ld ...\n",
 802                         curr_device, off, size);
 803
 804                 ret = nand_legacy_erase (nand_dev_desc + curr_device,
 805                                         off, size, clean);
 806
 807                 printf("%s\n", ret ? "ERROR" : "OK");
 808
 809                 return ret;
 810         } else {
 811                 printf ("Usage:\n%s\n", cmdtp->usage);
 812                 rcode = 1;
 813         }
 814
 815         return rcode;
 816     }
 817 }
 818
 819 U_BOOT_CMD(
 820         nand,   5,      1,      do_nand,
 821         "nand    - legacy NAND sub-system\n",
 822         "info  - show available NAND devices\n"
 823         "nand device [dev] - show or set current device\n"
 824         "nand read[.jffs2[s]]  addr off size\n"
 825         "nand write[.jffs2] addr off size - read/write `size' bytes starting\n"
 826         "    at offset `off' to/from memory address `addr'\n"
 827         "nand erase [clean] [off size] - erase `size' bytes from\n"
 828         "    offset `off' (entire device if not specified)\n"
 829         "nand bad - show bad blocks\n"
 830         "nand read.oob addr off size - read out-of-band data\n"
 831         "nand write.oob addr off size - read out-of-band data\n"
 832 );
 833
 834 int do_nandboot (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 835 {
 836         char *boot_device = NULL;
 837         char *ep;
 838         int dev;
 839         ulong cnt;
 840         ulong addr;
 841         ulong offset = 0;
 842         image_header_t *hdr;
 843         int rcode = 0;
 844         switch (argc) {
 845         case 1:
 846                 addr = CFG_LOAD_ADDR;
 847                 boot_device = getenv ("bootdevice");
 848                 break;
 849         case 2:
 850                 addr = simple_strtoul(argv[1], NULL, 16);
 851                 boot_device = getenv ("bootdevice");
 852                 break;
 853         case 3:
 854                 addr = simple_strtoul(argv[1], NULL, 16);
 855                 boot_device = argv[2];
 856                 break;
 857         case 4:
 858                 addr = simple_strtoul(argv[1], NULL, 16);
 859                 boot_device = argv[2];
 860                 offset = simple_strtoul(argv[3], NULL, 16);
 861                 break;
 862         default:
 863                 printf ("Usage:\n%s\n", cmdtp->usage);
 864                 SHOW_BOOT_PROGRESS (-1);
 865                 return 1;
 866         }
 867
 868         if (!boot_device) {
 869                 puts ("\n** No boot device **\n");
 870                 SHOW_BOOT_PROGRESS (-1);
 871                 return 1;
 872         }
 873
 874         dev = simple_strtoul(boot_device, &ep, 16);
 875
 876         if ((dev >= CFG_MAX_NAND_DEVICE) ||
 877             (nand_dev_desc[dev].ChipID == NAND_ChipID_UNKNOWN)) {
 878                 printf ("\n** Device %d not available\n", dev);
 879                 SHOW_BOOT_PROGRESS (-1);
 880                 return 1;
 881         }
 882
 883         printf ("\nLoading from device %d: %s at 0x%lx (offset 0x%lx)\n",
 884                 dev, nand_dev_desc[dev].name, nand_dev_desc[dev].IO_ADDR,
 885                 offset);
 886
 887         if (nand_legacy_rw (nand_dev_desc + dev, NANDRW_READ, offset,
 888                         SECTORSIZE, NULL, (u_char *)addr)) {
 889                 printf ("** Read error on %d\n", dev);
 890                 SHOW_BOOT_PROGRESS (-1);
 891                 return 1;
 892         }
 893
 894         hdr = (image_header_t *)addr;
 895
 896         if (ntohl(hdr->ih_magic) == IH_MAGIC) {
 897
 898                 print_image_hdr (hdr);
 899
 900                 cnt = (ntohl(hdr->ih_size) + sizeof(image_header_t));
 901                 cnt -= SECTORSIZE;
 902         } else {
 903                 printf ("\n** Bad Magic Number 0x%x **\n", ntohl(hdr->ih_magic));
 904                 SHOW_BOOT_PROGRESS (-1);
 905                 return 1;
 906         }
 907
 908         if (nand_legacy_rw (nand_dev_desc + dev, NANDRW_READ,
 909                         offset + SECTORSIZE, cnt, NULL,
 910                         (u_char *)(addr+SECTORSIZE))) {
 911                 printf ("** Read error on %d\n", dev);
 912                 SHOW_BOOT_PROGRESS (-1);
 913                 return 1;
 914         }
 915
 916         /* Loading ok, update default load address */
 917
 918         load_addr = addr;
 919
 920         /* Check if we should attempt an auto-start */
 921         if (((ep = getenv("autostart")) != NULL) && (strcmp(ep,"yes") == 0)) {
 922                 char *local_args[2];
 923                 extern int do_bootm (cmd_tbl_t *, int, int, char *[]);
 924
 925                 local_args[0] = argv[0];
 926                 local_args[1] = NULL;
 927
 928                 printf ("Automatic boot of image at addr 0x%08lx ...\n", addr);
 929
 930                 do_bootm (cmdtp, 0, 1, local_args);
 931                 rcode = 1;
 932         }
 933         return rcode;
 934 }
 935
 936 U_BOOT_CMD(
 937         nboot,  4,      1,      do_nandboot,
 938         "nboot   - boot from NAND device\n",
 939         "loadAddr dev\n"
 940 );
 941
 942 #endif /* (CONFIG_COMMANDS & CFG_CMD_NAND) */
 943
 944 #endif /* CFG_NAND_LEGACY */