package/mtd/src/mtd.c

   1 /*
   2  * mtd - simple memory technology device manipulation tool
   3  *
   4  * Copyright (C) 2005      Waldemar Brodkorb <wbx@dass-it.de>,
   5  * Copyright (C) 2005-2009 Felix Fietkau <nbd@openwrt.org>
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License v2
   9  * as published by the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19  *
  20  *
  21  * The code is based on the linux-mtd examples.
  22  */
  23
  24 #include <limits.h>
  25 #include <unistd.h>
  26 #include <stdlib.h>
  27 #include <stdio.h>
  28 #include <stdint.h>
  29 #include <signal.h>
  30 #include <sys/ioctl.h>
  31 #include <sys/syscall.h>
  32 #include <fcntl.h>
  33 #include <errno.h>
  34 #include <error.h>
  35 #include <time.h>
  36 #include <string.h>
  37 #include <sys/ioctl.h>
  38 #include <sys/types.h>
  39 #include <sys/param.h>
  40 #include <sys/mount.h>
  41 #include <sys/stat.h>
  42 #include <sys/reboot.h>
  43 #include <linux/reboot.h>
  44 #include <mtd/mtd-user.h>
  45 #include "fis.h"
  46 #include "mtd.h"
  47
  48 #ifndef MTDREFRESH
  49 #define MTDREFRESH      _IO('M', 50)
  50 #endif
  51
  52 #define MAX_ARGS 8
  53 #define JFFS2_DEFAULT_DIR       "" /* directory name without /, empty means root dir */
  54
  55 static char *buf = NULL;
  56 static char *imagefile = NULL;
  57 static char *jffs2file = NULL, *jffs2dir = JFFS2_DEFAULT_DIR;
  58 static int buflen = 0;
  59 int quiet;
  60 int no_erase;
  61 int mtdsize = 0;
  62 int erasesize = 0;
  63
  64 int mtd_open(const char *mtd, bool block)
  65 {
  66         FILE *fp;
  67         char dev[PATH_MAX];
  68         int i;
  69         int ret;
  70         int flags = O_RDWR | O_SYNC;
  71
  72         if ((fp = fopen("/proc/mtd", "r"))) {
  73                 while (fgets(dev, sizeof(dev), fp)) {
  74                         if (sscanf(dev, "mtd%d:", &i) && strstr(dev, mtd)) {
  75                                 snprintf(dev, sizeof(dev), "/dev/mtd%s/%d", (block ? "block" : ""), i);
  76                                 if ((ret=open(dev, flags))<0) {
  77                                         snprintf(dev, sizeof(dev), "/dev/mtd%s%d", (block ? "block" : ""), i);
  78                                         ret=open(dev, flags);
  79                                 }
  80                                 fclose(fp);
  81                                 return ret;
  82                         }
  83                 }
  84                 fclose(fp);
  85         }
  86
  87         return open(mtd, flags);
  88 }
  89
  90 int mtd_check_open(const char *mtd)
  91 {
  92         struct mtd_info_user mtdInfo;
  93         int fd;
  94
  95         fd = mtd_open(mtd, false);
  96         if(fd < 0) {
  97                 fprintf(stderr, "Could not open mtd device: %s\n", mtd);
  98                 return -1;
  99         }
 100
 101         if(ioctl(fd, MEMGETINFO, &mtdInfo)) {
 102                 fprintf(stderr, "Could not get MTD device info from %s\n", mtd);
 103                 close(fd);
 104                 return -1;
 105         }
 106         mtdsize = mtdInfo.size;
 107         erasesize = mtdInfo.erasesize;
 108
 109         return fd;
 110 }
 111
 112 int mtd_erase_block(int fd, int offset)
 113 {
 114         struct erase_info_user mtdEraseInfo;
 115
 116         mtdEraseInfo.start = offset;
 117         mtdEraseInfo.length = erasesize;
 118         ioctl(fd, MEMUNLOCK, &mtdEraseInfo);
 119         if (ioctl (fd, MEMERASE, &mtdEraseInfo) < 0)
 120                 return -1;
 121
 122         return 0;
 123 }
 124
 125 int mtd_write_buffer(int fd, const char *buf, int offset, int length)
 126 {
 127         lseek(fd, offset, SEEK_SET);
 128         write(fd, buf, length);
 129         return 0;
 130 }
 131
 132
 133 static int
 134 image_check(int imagefd, const char *mtd)
 135 {
 136         int ret = 1;
 137         if (trx_check) {
 138           ret = trx_check(imagefd, mtd, buf, &buflen);
 139         }
 140
 141         return ret;
 142 }
 143
 144 static int mtd_check(const char *mtd)
 145 {
 146         char *next = NULL;
 147         char *str = NULL;
 148         int fd;
 149
 150         if (strchr(mtd, ':')) {
 151                 str = strdup(mtd);
 152                 mtd = str;
 153         }
 154
 155         do {
 156                 next = strchr(mtd, ':');
 157                 if (next) {
 158                         *next = 0;
 159                         next++;
 160                 }
 161
 162                 fd = mtd_check_open(mtd);
 163                 if (fd < 0)
 164                         return 0;
 165
 166                 if (!buf)
 167                         buf = malloc(erasesize);
 168
 169                 close(fd);
 170                 mtd = next;
 171         } while (next);
 172
 173         if (str)
 174                 free(str);
 175
 176         return 1;
 177 }
 178
 179 static int
 180 mtd_unlock(const char *mtd)
 181 {
 182         struct erase_info_user mtdLockInfo;
 183         char *next = NULL;
 184         char *str = NULL;
 185         int fd;
 186
 187         if (strchr(mtd, ':')) {
 188                 str = strdup(mtd);
 189                 mtd = str;
 190         }
 191
 192         do {
 193                 next = strchr(mtd, ':');
 194                 if (next) {
 195                         *next = 0;
 196                         next++;
 197                 }
 198
 199                 fd = mtd_check_open(mtd);
 200                 if(fd < 0) {
 201                         fprintf(stderr, "Could not open mtd device: %s\n", mtd);
 202                         exit(1);
 203                 }
 204
 205                 if (quiet < 2)
 206                         fprintf(stderr, "Unlocking %s ...\n", mtd);
 207
 208                 mtdLockInfo.start = 0;
 209                 mtdLockInfo.length = mtdsize;
 210                 ioctl(fd, MEMUNLOCK, &mtdLockInfo);
 211                 close(fd);
 212                 mtd = next;
 213         } while (next);
 214
 215         if (str)
 216                 free(str);
 217
 218         return 0;
 219 }
 220
 221 static int
 222 mtd_erase(const char *mtd)
 223 {
 224         int fd;
 225         struct erase_info_user mtdEraseInfo;
 226
 227         if (quiet < 2)
 228                 fprintf(stderr, "Erasing %s ...\n", mtd);
 229
 230         fd = mtd_check_open(mtd);
 231         if(fd < 0) {
 232                 fprintf(stderr, "Could not open mtd device: %s\n", mtd);
 233                 exit(1);
 234         }
 235
 236         mtdEraseInfo.length = erasesize;
 237
 238         for (mtdEraseInfo.start = 0;
 239                  mtdEraseInfo.start < mtdsize;
 240                  mtdEraseInfo.start += erasesize) {
 241
 242                 ioctl(fd, MEMUNLOCK, &mtdEraseInfo);
 243                 if(ioctl(fd, MEMERASE, &mtdEraseInfo))
 244                         fprintf(stderr, "Failed to erase block on %s at 0x%x\n", mtd, mtdEraseInfo.start);
 245         }
 246
 247         close(fd);
 248         return 0;
 249
 250 }
 251
 252 static int
 253 mtd_refresh(const char *mtd)
 254 {
 255         int fd;
 256
 257         if (quiet < 2)
 258                 fprintf(stderr, "Refreshing mtd partition %s ... ", mtd);
 259
 260         fd = mtd_check_open(mtd);
 261         if(fd < 0) {
 262                 fprintf(stderr, "Could not open mtd device: %s\n", mtd);
 263                 exit(1);
 264         }
 265
 266         if (ioctl(fd, MTDREFRESH, NULL)) {
 267                 fprintf(stderr, "Failed to refresh the MTD device\n");
 268                 close(fd);
 269                 exit(1);
 270         }
 271         close(fd);
 272
 273         if (quiet < 2)
 274                 fprintf(stderr, "\n");
 275
 276         return 0;
 277 }
 278
 279 static void
 280 indicate_writing(const char *mtd)
 281 {
 282         if (quiet < 2)
 283                 fprintf(stderr, "\nWriting from %s to %s ... ", imagefile, mtd);
 284
 285         if (!quiet)
 286                 fprintf(stderr, " [ ]");
 287 }
 288
 289 static int
 290 mtd_write(int imagefd, const char *mtd, char *fis_layout, size_t part_offset)
 291 {
 292         char *next = NULL;
 293         char *str = NULL;
 294         int fd, result;
 295         ssize_t r, w, e;
 296         ssize_t skip = 0;
 297         uint32_t offset = 0;
 298         int jffs2_replaced = 0;
 299
 300 #ifdef FIS_SUPPORT
 301         static struct fis_part new_parts[MAX_ARGS];
 302         static struct fis_part old_parts[MAX_ARGS];
 303         int n_new = 0, n_old = 0;
 304
 305         if (fis_layout) {
 306                 const char *tmp = mtd;
 307                 char *word, *brkt;
 308                 int ret;
 309
 310                 memset(&old_parts, 0, sizeof(old_parts));
 311                 memset(&new_parts, 0, sizeof(new_parts));
 312
 313                 do {
 314                         next = strchr(tmp, ':');
 315                         if (!next)
 316                                 next = (char *) tmp + strlen(tmp);
 317
 318                         memcpy(old_parts[n_old].name, tmp, next - tmp);
 319
 320                         n_old++;
 321                         tmp = next + 1;
 322                 } while(*next);
 323
 324                 for (word = strtok_r(fis_layout, ",", &brkt);
 325                      word;
 326                          word = strtok_r(NULL, ",", &brkt)) {
 327
 328                         tmp = strtok(word, ":");
 329                         strncpy((char *) new_parts[n_new].name, tmp, sizeof(new_parts[n_new].name) - 1);
 330
 331                         tmp = strtok(NULL, ":");
 332                         if (!tmp)
 333                                 goto next;
 334
 335                         new_parts[n_new].size = strtoul(tmp, NULL, 0);
 336
 337                         tmp = strtok(NULL, ":");
 338                         if (!tmp)
 339                                 goto next;
 340
 341                         new_parts[n_new].loadaddr = strtoul(tmp, NULL, 16);
 342 next:
 343                         n_new++;
 344                 }
 345                 ret = fis_validate(old_parts, n_old, new_parts, n_new);
 346                 if (ret < 0) {
 347                         fprintf(stderr, "Failed to validate the new FIS partition table\n");
 348                         exit(1);
 349                 }
 350                 if (ret == 0)
 351                         fis_layout = NULL;
 352         }
 353 #endif
 354
 355         if (strchr(mtd, ':')) {
 356                 str = strdup(mtd);
 357                 mtd = str;
 358         }
 359
 360         r = 0;
 361
 362 resume:
 363         next = strchr(mtd, ':');
 364         if (next) {
 365                 *next = 0;
 366                 next++;
 367         }
 368
 369         fd = mtd_check_open(mtd);
 370         if(fd < 0) {
 371                 fprintf(stderr, "Could not open mtd device: %s\n", mtd);
 372                 exit(1);
 373         }
 374
 375         if (part_offset > 0) {
 376                 fprintf(stderr, "Seeking on mtd device '%s' to: %u\n", mtd, part_offset);
 377                 lseek(fd, part_offset, SEEK_SET);
 378         }
 379
 380         indicate_writing(mtd);
 381
 382         w = e = 0;
 383         for (;;) {
 384                 /* buffer may contain data already (from trx check or last mtd partition write attempt) */
 385                 while (buflen < erasesize) {
 386                         r = read(imagefd, buf + buflen, erasesize - buflen);
 387                         if (r < 0) {
 388                                 if ((errno == EINTR) || (errno == EAGAIN))
 389                                         continue;
 390                                 else {
 391                                         perror("read");
 392                                         break;
 393                                 }
 394                         }
 395
 396                         if (r == 0)
 397                                 break;
 398
 399                         buflen += r;
 400                 }
 401
 402                 if (buflen == 0)
 403                         break;
 404
 405                 if (skip > 0) {
 406                         skip -= buflen;
 407                         buflen = 0;
 408                         if (skip <= 0)
 409                                 indicate_writing(mtd);
 410
 411                         continue;
 412                 }
 413
 414                 if (jffs2file) {
 415                         if (memcmp(buf, JFFS2_EOF, sizeof(JFFS2_EOF) - 1) == 0) {
 416                                 if (!quiet)
 417                                         fprintf(stderr, "\b\b\b   ");
 418                                 if (quiet < 2)
 419                                         fprintf(stderr, "\nAppending jffs2 data from %s to %s...", jffs2file, mtd);
 420                                 /* got an EOF marker - this is the place to add some jffs2 data */
 421                                 skip = mtd_replace_jffs2(mtd, fd, e, jffs2file);
 422                                 jffs2_replaced = 1;
 423
 424                                 /* don't add it again */
 425                                 jffs2file = NULL;
 426
 427                                 w += skip;
 428                                 e += skip;
 429                                 skip -= buflen;
 430                                 buflen = 0;
 431                                 offset = 0;
 432                                 continue;
 433                         }
 434                         /* no EOF marker, make sure we figure out the last inode number
 435                          * before appending some data */
 436                         mtd_parse_jffs2data(buf, jffs2dir);
 437                 }
 438
 439                 /* need to erase the next block before writing data to it */
 440                 if(!no_erase)
 441                 {
 442                         while (w + buflen > e) {
 443                                 if (!quiet)
 444                                         fprintf(stderr, "\b\b\b[e]");
 445
 446
 447                                 if (mtd_erase_block(fd, e) < 0) {
 448                                         if (next) {
 449                                                 if (w < e) {
 450                                                         write(fd, buf + offset, e - w);
 451                                                         offset = e - w;
 452                                                 }
 453                                                 w = 0;
 454                                                 e = 0;
 455                                                 close(fd);
 456                                                 mtd = next;
 457                                                 fprintf(stderr, "\b\b\b   \n");
 458                                                 goto resume;
 459                                         } else {
 460                                                 fprintf(stderr, "Failed to erase block\n");
 461                                                 exit(1);
 462                                         }
 463                                 }
 464
 465                                 /* erase the chunk */
 466                                 e += erasesize;
 467                         }
 468                 }
 469
 470                 if (!quiet)
 471                         fprintf(stderr, "\b\b\b[w]");
 472
 473                 if ((result = write(fd, buf + offset, buflen)) < buflen) {
 474                         if (result < 0) {
 475                                 fprintf(stderr, "Error writing image.\n");
 476                                 exit(1);
 477                         } else {
 478                                 fprintf(stderr, "Insufficient space.\n");
 479                                 exit(1);
 480                         }
 481                 }
 482                 w += buflen;
 483
 484                 buflen = 0;
 485                 offset = 0;
 486         }
 487
 488         if (jffs2_replaced && trx_fixup) {
 489                 trx_fixup(fd, mtd);
 490         }
 491
 492         if (!quiet)
 493                 fprintf(stderr, "\b\b\b\b    ");
 494
 495 done:
 496         if (quiet < 2)
 497                 fprintf(stderr, "\n");
 498
 499 #ifdef FIS_SUPPORT
 500         if (fis_layout) {
 501                 if (fis_remap(old_parts, n_old, new_parts, n_new) < 0)
 502                         fprintf(stderr, "Failed to update the FIS partition table\n");
 503         }
 504 #endif
 505
 506         close(fd);
 507         return 0;
 508 }
 509
 510 static void usage(void)
 511 {
 512         fprintf(stderr, "Usage: mtd [<options> ...] <command> [<arguments> ...] <device>[:<device>...]\n\n"
 513         "The device is in the format of mtdX (eg: mtd4) or its label.\n"
 514         "mtd recognizes these commands:\n"
 515         "        unlock                  unlock the device\n"
 516         "        refresh                 refresh mtd partition\n"
 517         "        erase                   erase all data on device\n"
 518         "        write <imagefile>|-     write <imagefile> (use - for stdin) to device\n"
 519         "        jffs2write <file>       append <file> to the jffs2 partition on the device\n");
 520         if (mtd_fixtrx) {
 521             fprintf(stderr,
 522         "        fixtrx                  fix the checksum in a trx header on first boot\n");
 523         }
 524         if (mtd_fixseama) {
 525             fprintf(stderr,
 526         "        fixseama                fix the checksum in a seama header on first boot\n");
 527         }
 528     fprintf(stderr,
 529         "Following options are available:\n"
 530         "        -q                      quiet mode (once: no [w] on writing,\n"
 531         "                                           twice: no status messages)\n"
 532         "        -n                      write without first erasing the blocks\n"
 533         "        -r                      reboot after successful command\n"
 534         "        -f                      force write without trx checks\n"
 535         "        -e <device>             erase <device> before executing the command\n"
 536         "        -d <name>               directory for jffs2write, defaults to \"tmp\"\n"
 537         "        -j <name>               integrate <file> into jffs2 data when writing an image\n"
 538         "        -p                      write beginning at partition offset\n");
 539         if (mtd_fixtrx) {
 540             fprintf(stderr,
 541         "        -o offset               offset of the image header in the partition(for fixtrx)\n");
 542     }
 543         fprintf(stderr,
 544 #ifdef FIS_SUPPORT
 545         "        -F <part>[:<size>[:<entrypoint>]][,<part>...]\n"
 546         "                                alter the fis partition table to create new partitions replacing\n"
 547         "                                the partitions provided as argument to the write command\n"
 548         "                                (only valid together with the write command)\n"
 549 #endif
 550         "\n"
 551         "Example: To write linux.trx to mtd4 labeled as linux and reboot afterwards\n"
 552         "         mtd -r write linux.trx linux\n\n");
 553         exit(1);
 554 }
 555
 556 static void do_reboot(void)
 557 {
 558         fprintf(stderr, "Rebooting ...\n");
 559         fflush(stderr);
 560
 561         /* try regular reboot method first */
 562         system("/sbin/reboot");
 563         sleep(2);
 564
 565         /* if we're still alive at this point, force the kernel to reboot */
 566         syscall(SYS_reboot,LINUX_REBOOT_MAGIC1,LINUX_REBOOT_MAGIC2,LINUX_REBOOT_CMD_RESTART,NULL);
 567 }
 568
 569 int main (int argc, char **argv)
 570 {
 571         int ch, i, boot, imagefd = 0, force, unlocked;
 572         char *erase[MAX_ARGS], *device = NULL;
 573         char *fis_layout = NULL;
 574         size_t offset = 0, part_offset = 0;
 575         enum {
 576                 CMD_ERASE,
 577                 CMD_WRITE,
 578                 CMD_UNLOCK,
 579                 CMD_REFRESH,
 580                 CMD_JFFS2WRITE,
 581                 CMD_FIXTRX,
 582                 CMD_FIXSEAMA,
 583         } cmd = -1;
 584
 585         erase[0] = NULL;
 586         boot = 0;
 587         force = 0;
 588         buflen = 0;
 589         quiet = 0;
 590         no_erase = 0;
 591
 592         while ((ch = getopt(argc, argv,
 593 #ifdef FIS_SUPPORT
 594                         "F:"
 595 #endif
 596                         "frnqe:d:j:p:o:")) != -1)
 597                 switch (ch) {
 598                         case 'f':
 599                                 force = 1;
 600                                 break;
 601                         case 'r':
 602                                 boot = 1;
 603                                 break;
 604                         case 'n':
 605                                 no_erase = 1;
 606                                 break;
 607                         case 'j':
 608                                 jffs2file = optarg;
 609                                 break;
 610                         case 'q':
 611                                 quiet++;
 612                                 break;
 613                         case 'e':
 614                                 i = 0;
 615                                 while ((erase[i] != NULL) && ((i + 1) < MAX_ARGS))
 616                                         i++;
 617
 618                                 erase[i++] = optarg;
 619                                 erase[i] = NULL;
 620                                 break;
 621                         case 'd':
 622                                 jffs2dir = optarg;
 623                                 break;
 624                         case 'p':
 625                                 errno = 0;
 626                                 part_offset = strtoul(optarg, 0, 0);
 627                                 if (errno) {
 628                                         fprintf(stderr, "-p: illegal numeric string\n");
 629                                         usage();
 630                                 }
 631                                 break;
 632                         case 'o':
 633                                 if (!mtd_fixtrx) {
 634                                         fprintf(stderr, "-o: is not available on this platform\n");
 635                                         usage();
 636                                 }
 637                                 errno = 0;
 638                                 offset = strtoul(optarg, 0, 0);
 639                                 if (errno) {
 640                                         fprintf(stderr, "-o: illegal numeric string\n");
 641                                         usage();
 642                                 }
 643                                 break;
 644 #ifdef FIS_SUPPORT
 645                         case 'F':
 646                                 fis_layout = optarg;
 647                                 break;
 648 #endif
 649                         case '?':
 650                         default:
 651                                 usage();
 652                 }
 653         argc -= optind;
 654         argv += optind;
 655
 656         if (argc < 2)
 657                 usage();
 658
 659         if ((strcmp(argv[0], "unlock") == 0) && (argc == 2)) {
 660                 cmd = CMD_UNLOCK;
 661                 device = argv[1];
 662         } else if ((strcmp(argv[0], "refresh") == 0) && (argc == 2)) {
 663                 cmd = CMD_REFRESH;
 664                 device = argv[1];
 665         } else if ((strcmp(argv[0], "erase") == 0) && (argc == 2)) {
 666                 cmd = CMD_ERASE;
 667                 device = argv[1];
 668         } else if (((strcmp(argv[0], "fixtrx") == 0) && (argc == 2)) && mtd_fixtrx) {
 669                 cmd = CMD_FIXTRX;
 670                 device = argv[1];
 671         } else if (((strcmp(argv[0], "fixseama") == 0) && (argc == 2)) && mtd_fixseama) {
 672                 cmd = CMD_FIXSEAMA;
 673                 device = argv[1];
 674         } else if ((strcmp(argv[0], "write") == 0) && (argc == 3)) {
 675                 cmd = CMD_WRITE;
 676                 device = argv[2];
 677
 678                 if (strcmp(argv[1], "-") == 0) {
 679                         imagefile = "<stdin>";
 680                         imagefd = 0;
 681                 } else {
 682                         imagefile = argv[1];
 683                         if ((imagefd = open(argv[1], O_RDONLY)) < 0) {
 684                                 fprintf(stderr, "Couldn't open image file: %s!\n", imagefile);
 685                                 exit(1);
 686                         }
 687                 }
 688
 689                 if (!mtd_check(device)) {
 690                         fprintf(stderr, "Can't open device for writing!\n");
 691                         exit(1);
 692                 }
 693                 /* check trx file before erasing or writing anything */
 694                 if (!image_check(imagefd, device) && !force) {
 695                         fprintf(stderr, "Image check failed.\n");
 696                         exit(1);
 697                 }
 698         } else if ((strcmp(argv[0], "jffs2write") == 0) && (argc == 3)) {
 699                 cmd = CMD_JFFS2WRITE;
 700                 device = argv[2];
 701
 702                 imagefile = argv[1];
 703                 if (!mtd_check(device)) {
 704                         fprintf(stderr, "Can't open device for writing!\n");
 705                         exit(1);
 706                 }
 707         } else {
 708                 usage();
 709         }
 710
 711         sync();
 712
 713         i = 0;
 714         unlocked = 0;
 715         while (erase[i] != NULL) {
 716                 mtd_unlock(erase[i]);
 717                 mtd_erase(erase[i]);
 718                 if (strcmp(erase[i], device) == 0)
 719                         unlocked = 1;
 720                 i++;
 721         }
 722
 723         switch (cmd) {
 724                 case CMD_UNLOCK:
 725                         if (!unlocked)
 726                                 mtd_unlock(device);
 727                         break;
 728                 case CMD_ERASE:
 729                         if (!unlocked)
 730                                 mtd_unlock(device);
 731                         mtd_erase(device);
 732                         break;
 733                 case CMD_WRITE:
 734                         if (!unlocked)
 735                                 mtd_unlock(device);
 736                         mtd_write(imagefd, device, fis_layout, part_offset);
 737                         break;
 738                 case CMD_JFFS2WRITE:
 739                         if (!unlocked)
 740                                 mtd_unlock(device);
 741                         mtd_write_jffs2(device, imagefile, jffs2dir);
 742                         break;
 743                 case CMD_REFRESH:
 744                         mtd_refresh(device);
 745                         break;
 746                 case CMD_FIXTRX:
 747                     if (mtd_fixtrx) {
 748                             mtd_fixtrx(device, offset);
 749             }
 750                 case CMD_FIXSEAMA:
 751                         if (mtd_fixseama)
 752                             mtd_fixseama(device, 0);
 753                         break;
 754         }
 755
 756         sync();
 757
 758         if (boot)
 759                 do_reboot();
 760
 761         return 0;
 762 }