package/system/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 #define _GNU_SOURCE
  25 #include <limits.h>
  26 #include <unistd.h>
  27 #include <stdlib.h>
  28 #include <stdio.h>
  29 #include <stdint.h>
  30 #include <signal.h>
  31 #include <sys/ioctl.h>
  32 #include <sys/syscall.h>
  33 #include <fcntl.h>
  34 #include <errno.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 #include <libubox/md5.h>
  49
  50 #define MAX_ARGS 8
  51 #define JFFS2_DEFAULT_DIR       "" /* directory name without /, empty means root dir */
  52
  53 static char *buf = NULL;
  54 static char *imagefile = NULL;
  55 static char *jffs2file = NULL, *jffs2dir = JFFS2_DEFAULT_DIR;
  56 static int buflen = 0;
  57 int quiet;
  58 int no_erase;
  59 int mtdsize = 0;
  60 int erasesize = 0;
  61 int jffs2_skip_bytes=0;
  62 int mtdtype = 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         char name[PATH_MAX];
  72
  73         snprintf(name, sizeof(name), "\"%s\"", mtd);
  74         if ((fp = fopen("/proc/mtd", "r"))) {
  75                 while (fgets(dev, sizeof(dev), fp)) {
  76                         if (sscanf(dev, "mtd%d:", &i) && strstr(dev, name)) {
  77                                 snprintf(dev, sizeof(dev), "/dev/mtd%s/%d", (block ? "block" : ""), i);
  78                                 if ((ret=open(dev, flags))<0) {
  79                                         snprintf(dev, sizeof(dev), "/dev/mtd%s%d", (block ? "block" : ""), i);
  80                                         ret=open(dev, flags);
  81                                 }
  82                                 fclose(fp);
  83                                 return ret;
  84                         }
  85                 }
  86                 fclose(fp);
  87         }
  88
  89         return open(mtd, flags);
  90 }
  91
  92 int mtd_check_open(const char *mtd)
  93 {
  94         struct mtd_info_user mtdInfo;
  95         int fd;
  96
  97         fd = mtd_open(mtd, false);
  98         if(fd < 0) {
  99                 fprintf(stderr, "Could not open mtd device: %s\n", mtd);
 100                 return -1;
 101         }
 102
 103         if(ioctl(fd, MEMGETINFO, &mtdInfo)) {
 104                 fprintf(stderr, "Could not get MTD device info from %s\n", mtd);
 105                 close(fd);
 106                 return -1;
 107         }
 108         mtdsize = mtdInfo.size;
 109         erasesize = mtdInfo.erasesize;
 110         mtdtype = mtdInfo.type;
 111
 112         return fd;
 113 }
 114
 115 int mtd_block_is_bad(int fd, int offset)
 116 {
 117         int r = 0;
 118         loff_t o = offset;
 119
 120         if (mtdtype == MTD_NANDFLASH)
 121         {
 122                 r = ioctl(fd, MEMGETBADBLOCK, &o);
 123                 if (r < 0)
 124                 {
 125                         fprintf(stderr, "Failed to get erase block status\n");
 126                         exit(1);
 127                 }
 128         }
 129         return r;
 130 }
 131
 132 int mtd_erase_block(int fd, int offset)
 133 {
 134         struct erase_info_user mtdEraseInfo;
 135
 136         mtdEraseInfo.start = offset;
 137         mtdEraseInfo.length = erasesize;
 138         ioctl(fd, MEMUNLOCK, &mtdEraseInfo);
 139         if (ioctl (fd, MEMERASE, &mtdEraseInfo) < 0)
 140                 return -1;
 141
 142         return 0;
 143 }
 144
 145 int mtd_write_buffer(int fd, const char *buf, int offset, int length)
 146 {
 147         lseek(fd, offset, SEEK_SET);
 148         write(fd, buf, length);
 149         return 0;
 150 }
 151
 152
 153 static int
 154 image_check(int imagefd, const char *mtd)
 155 {
 156         int ret = 1;
 157         if (trx_check) {
 158           ret = trx_check(imagefd, mtd, buf, &buflen);
 159         }
 160
 161         return ret;
 162 }
 163
 164 static int mtd_check(const char *mtd)
 165 {
 166         char *next = NULL;
 167         char *str = NULL;
 168         int fd;
 169
 170         if (strchr(mtd, ':')) {
 171                 str = strdup(mtd);
 172                 mtd = str;
 173         }
 174
 175         do {
 176                 next = strchr(mtd, ':');
 177                 if (next) {
 178                         *next = 0;
 179                         next++;
 180                 }
 181
 182                 fd = mtd_check_open(mtd);
 183                 if (fd < 0)
 184                         return 0;
 185
 186                 if (!buf)
 187                         buf = malloc(erasesize);
 188
 189                 close(fd);
 190                 mtd = next;
 191         } while (next);
 192
 193         if (str)
 194                 free(str);
 195
 196         return 1;
 197 }
 198
 199 static int
 200 mtd_unlock(const char *mtd)
 201 {
 202         struct erase_info_user mtdLockInfo;
 203         char *next = NULL;
 204         char *str = NULL;
 205         int fd;
 206
 207         if (strchr(mtd, ':')) {
 208                 str = strdup(mtd);
 209                 mtd = str;
 210         }
 211
 212         do {
 213                 next = strchr(mtd, ':');
 214                 if (next) {
 215                         *next = 0;
 216                         next++;
 217                 }
 218
 219                 fd = mtd_check_open(mtd);
 220                 if(fd < 0) {
 221                         fprintf(stderr, "Could not open mtd device: %s\n", mtd);
 222                         exit(1);
 223                 }
 224
 225                 if (quiet < 2)
 226                         fprintf(stderr, "Unlocking %s ...\n", mtd);
 227
 228                 mtdLockInfo.start = 0;
 229                 mtdLockInfo.length = mtdsize;
 230                 ioctl(fd, MEMUNLOCK, &mtdLockInfo);
 231                 close(fd);
 232                 mtd = next;
 233         } while (next);
 234
 235         if (str)
 236                 free(str);
 237
 238         return 0;
 239 }
 240
 241 static int
 242 mtd_erase(const char *mtd)
 243 {
 244         int fd;
 245         struct erase_info_user mtdEraseInfo;
 246
 247         if (quiet < 2)
 248                 fprintf(stderr, "Erasing %s ...\n", mtd);
 249
 250         fd = mtd_check_open(mtd);
 251         if(fd < 0) {
 252                 fprintf(stderr, "Could not open mtd device: %s\n", mtd);
 253                 exit(1);
 254         }
 255
 256         mtdEraseInfo.length = erasesize;
 257
 258         for (mtdEraseInfo.start = 0;
 259                  mtdEraseInfo.start < mtdsize;
 260                  mtdEraseInfo.start += erasesize) {
 261                 if (mtd_block_is_bad(fd, mtdEraseInfo.start)) {
 262                         if (!quiet)
 263                                 fprintf(stderr, "\nSkipping bad block at 0x%x   ", mtdEraseInfo.start);
 264                 } else {
 265                         ioctl(fd, MEMUNLOCK, &mtdEraseInfo);
 266                         if(ioctl(fd, MEMERASE, &mtdEraseInfo))
 267                                 fprintf(stderr, "Failed to erase block on %s at 0x%x\n", mtd, mtdEraseInfo.start);
 268                 }
 269         }
 270
 271         close(fd);
 272         return 0;
 273
 274 }
 275
 276 static int
 277 mtd_dump(const char *mtd, int part_offset, int size)
 278 {
 279         int ret = 0, offset = 0;
 280         int fd;
 281         char *buf;
 282
 283         if (quiet < 2)
 284                 fprintf(stderr, "Dumping %s ...\n", mtd);
 285
 286         fd = mtd_check_open(mtd);
 287         if(fd < 0) {
 288                 fprintf(stderr, "Could not open mtd device: %s\n", mtd);
 289                 return -1;
 290         }
 291
 292         if (!size)
 293                 size = mtdsize;
 294
 295         if (part_offset)
 296                 lseek(fd, part_offset, SEEK_SET);
 297
 298         buf = malloc(erasesize);
 299         if (!buf)
 300                 return -1;
 301
 302         do {
 303                 int len = (size > erasesize) ? (erasesize) : (size);
 304                 int rlen = read(fd, buf, len);
 305
 306                 if (rlen < 0) {
 307                         if (errno == EINTR)
 308                                 continue;
 309                         ret = -1;
 310                         goto out;
 311                 }
 312                 if (!rlen || rlen != len)
 313                         break;
 314                 if (mtd_block_is_bad(fd, offset)) {
 315                         fprintf(stderr, "skipping bad block at 0x%08x\n", offset);
 316                 } else {
 317                         size -= rlen;
 318                         write(1, buf, rlen);
 319                 }
 320                 offset += rlen;
 321         } while (size > 0);
 322
 323 out:
 324         close(fd);
 325         return ret;
 326 }
 327
 328 static int
 329 mtd_verify(const char *mtd, char *file)
 330 {
 331         uint32_t f_md5[4], m_md5[4];
 332         struct stat s;
 333         md5_ctx_t ctx;
 334         int ret = 0;
 335         int fd;
 336
 337         if (quiet < 2)
 338                 fprintf(stderr, "Verifying %s against %s ...\n", mtd, file);
 339
 340         if (stat(file, &s) || md5sum(file, f_md5) < 0) {
 341                 fprintf(stderr, "Failed to hash %s\n", file);
 342                 return -1;
 343         }
 344
 345         fd = mtd_check_open(mtd);
 346         if(fd < 0) {
 347                 fprintf(stderr, "Could not open mtd device: %s\n", mtd);
 348                 return -1;
 349         }
 350
 351         md5_begin(&ctx);
 352         do {
 353                 char buf[256];
 354                 int len = (s.st_size > sizeof(buf)) ? (sizeof(buf)) : (s.st_size);
 355                 int rlen = read(fd, buf, len);
 356
 357                 if (rlen < 0) {
 358                         if (errno == EINTR)
 359                                 continue;
 360                         ret = -1;
 361                         goto out;
 362                 }
 363                 if (!rlen)
 364                         break;
 365                 md5_hash(buf, rlen, &ctx);
 366                 s.st_size -= rlen;
 367         } while (s.st_size > 0);
 368
 369         md5_end(m_md5, &ctx);
 370
 371         fprintf(stderr, "%08x%08x%08x%08x - %s\n", m_md5[0], m_md5[1], m_md5[2], m_md5[3], mtd);
 372         fprintf(stderr, "%08x%08x%08x%08x - %s\n", f_md5[0], f_md5[1], f_md5[2], f_md5[3], file);
 373
 374         ret = memcmp(f_md5, m_md5, sizeof(m_md5));
 375         if (!ret)
 376                 fprintf(stderr, "Success\n");
 377         else
 378                 fprintf(stderr, "Failed\n");
 379
 380 out:
 381         close(fd);
 382         return ret;
 383 }
 384
 385 static void
 386 indicate_writing(const char *mtd)
 387 {
 388         if (quiet < 2)
 389                 fprintf(stderr, "\nWriting from %s to %s ... ", imagefile, mtd);
 390
 391         if (!quiet)
 392                 fprintf(stderr, " [ ]");
 393 }
 394
 395 static int
 396 mtd_write(int imagefd, const char *mtd, char *fis_layout, size_t part_offset)
 397 {
 398         char *next = NULL;
 399         char *str = NULL;
 400         int fd, result;
 401         ssize_t r, w, e;
 402         ssize_t skip = 0;
 403         uint32_t offset = 0;
 404         int jffs2_replaced = 0;
 405         int skip_bad_blocks = 0;
 406
 407 #ifdef FIS_SUPPORT
 408         static struct fis_part new_parts[MAX_ARGS];
 409         static struct fis_part old_parts[MAX_ARGS];
 410         int n_new = 0, n_old = 0;
 411
 412         if (fis_layout) {
 413                 const char *tmp = mtd;
 414                 char *word, *brkt;
 415                 int ret;
 416
 417                 memset(&old_parts, 0, sizeof(old_parts));
 418                 memset(&new_parts, 0, sizeof(new_parts));
 419
 420                 do {
 421                         next = strchr(tmp, ':');
 422                         if (!next)
 423                                 next = (char *) tmp + strlen(tmp);
 424
 425                         memcpy(old_parts[n_old].name, tmp, next - tmp);
 426
 427                         n_old++;
 428                         tmp = next + 1;
 429                 } while(*next);
 430
 431                 for (word = strtok_r(fis_layout, ",", &brkt);
 432                      word;
 433                          word = strtok_r(NULL, ",", &brkt)) {
 434
 435                         tmp = strtok(word, ":");
 436                         strncpy((char *) new_parts[n_new].name, tmp, sizeof(new_parts[n_new].name) - 1);
 437
 438                         tmp = strtok(NULL, ":");
 439                         if (!tmp)
 440                                 goto next;
 441
 442                         new_parts[n_new].size = strtoul(tmp, NULL, 0);
 443
 444                         tmp = strtok(NULL, ":");
 445                         if (!tmp)
 446                                 goto next;
 447
 448                         new_parts[n_new].loadaddr = strtoul(tmp, NULL, 16);
 449 next:
 450                         n_new++;
 451                 }
 452                 ret = fis_validate(old_parts, n_old, new_parts, n_new);
 453                 if (ret < 0) {
 454                         fprintf(stderr, "Failed to validate the new FIS partition table\n");
 455                         exit(1);
 456                 }
 457                 if (ret == 0)
 458                         fis_layout = NULL;
 459         }
 460 #endif
 461
 462         if (strchr(mtd, ':')) {
 463                 str = strdup(mtd);
 464                 mtd = str;
 465         }
 466
 467         r = 0;
 468
 469 resume:
 470         next = strchr(mtd, ':');
 471         if (next) {
 472                 *next = 0;
 473                 next++;
 474         }
 475
 476         fd = mtd_check_open(mtd);
 477         if(fd < 0) {
 478                 fprintf(stderr, "Could not open mtd device: %s\n", mtd);
 479                 exit(1);
 480         }
 481         if (part_offset > 0) {
 482                 fprintf(stderr, "Seeking on mtd device '%s' to: %zu\n", mtd, part_offset);
 483                 lseek(fd, part_offset, SEEK_SET);
 484         }
 485
 486         indicate_writing(mtd);
 487
 488         w = e = 0;
 489         for (;;) {
 490                 /* buffer may contain data already (from trx check or last mtd partition write attempt) */
 491                 while (buflen < erasesize) {
 492                         r = read(imagefd, buf + buflen, erasesize - buflen);
 493                         if (r < 0) {
 494                                 if ((errno == EINTR) || (errno == EAGAIN))
 495                                         continue;
 496                                 else {
 497                                         perror("read");
 498                                         break;
 499                                 }
 500                         }
 501
 502                         if (r == 0)
 503                                 break;
 504
 505                         buflen += r;
 506                 }
 507
 508                 if (buflen == 0)
 509                         break;
 510
 511                 if (buflen < erasesize) {
 512                         /* Pad block to eraseblock size */
 513                         memset(&buf[buflen], 0xff, erasesize - buflen);
 514                         buflen = erasesize;
 515                 }
 516
 517                 if (skip > 0) {
 518                         skip -= buflen;
 519                         buflen = 0;
 520                         if (skip <= 0)
 521                                 indicate_writing(mtd);
 522
 523                         continue;
 524                 }
 525
 526                 if (jffs2file && w >= jffs2_skip_bytes) {
 527                         if (memcmp(buf, JFFS2_EOF, sizeof(JFFS2_EOF) - 1) == 0) {
 528                                 if (!quiet)
 529                                         fprintf(stderr, "\b\b\b   ");
 530                                 if (quiet < 2)
 531                                         fprintf(stderr, "\nAppending jffs2 data from %s to %s...", jffs2file, mtd);
 532                                 /* got an EOF marker - this is the place to add some jffs2 data */
 533                                 skip = mtd_replace_jffs2(mtd, fd, e, jffs2file);
 534                                 jffs2_replaced = 1;
 535
 536                                 /* don't add it again */
 537                                 jffs2file = NULL;
 538
 539                                 w += skip;
 540                                 e += skip;
 541                                 skip -= buflen;
 542                                 buflen = 0;
 543                                 offset = 0;
 544                                 continue;
 545                         }
 546                         /* no EOF marker, make sure we figure out the last inode number
 547                          * before appending some data */
 548                         mtd_parse_jffs2data(buf, jffs2dir);
 549                 }
 550
 551                 /* need to erase the next block before writing data to it */
 552                 if(!no_erase)
 553                 {
 554                         while (w + buflen > e - skip_bad_blocks) {
 555                                 if (!quiet)
 556                                         fprintf(stderr, "\b\b\b[e]");
 557
 558                                 if (mtd_block_is_bad(fd, e)) {
 559                                         if (!quiet)
 560                                                 fprintf(stderr, "\nSkipping bad block at 0x%08zx   ", e);
 561
 562                                         skip_bad_blocks += erasesize;
 563                                         e += erasesize;
 564
 565                                         // Move the file pointer along over the bad block.
 566                                         lseek(fd, erasesize, SEEK_CUR);
 567                                         continue;
 568                                 }
 569
 570                                 if (mtd_erase_block(fd, e) < 0) {
 571                                         if (next) {
 572                                                 if (w < e) {
 573                                                         write(fd, buf + offset, e - w);
 574                                                         offset = e - w;
 575                                                 }
 576                                                 w = 0;
 577                                                 e = 0;
 578                                                 close(fd);
 579                                                 mtd = next;
 580                                                 fprintf(stderr, "\b\b\b   \n");
 581                                                 goto resume;
 582                                         } else {
 583                                                 fprintf(stderr, "Failed to erase block\n");
 584                                                 exit(1);
 585                                         }
 586                                 }
 587
 588                                 /* erase the chunk */
 589                                 e += erasesize;
 590                         }
 591                 }
 592
 593                 if (!quiet)
 594                         fprintf(stderr, "\b\b\b[w]");
 595
 596                 if ((result = write(fd, buf + offset, buflen)) < buflen) {
 597                         if (result < 0) {
 598                                 fprintf(stderr, "Error writing image.\n");
 599                                 exit(1);
 600                         } else {
 601                                 fprintf(stderr, "Insufficient space.\n");
 602                                 exit(1);
 603                         }
 604                 }
 605                 w += buflen;
 606
 607                 buflen = 0;
 608                 offset = 0;
 609         }
 610
 611         if (jffs2_replaced && trx_fixup) {
 612                 trx_fixup(fd, mtd);
 613         }
 614
 615         if (!quiet)
 616                 fprintf(stderr, "\b\b\b\b    ");
 617
 618         if (quiet < 2)
 619                 fprintf(stderr, "\n");
 620
 621 #ifdef FIS_SUPPORT
 622         if (fis_layout) {
 623                 if (fis_remap(old_parts, n_old, new_parts, n_new) < 0)
 624                         fprintf(stderr, "Failed to update the FIS partition table\n");
 625         }
 626 #endif
 627
 628         close(fd);
 629         return 0;
 630 }
 631
 632 static void usage(void)
 633 {
 634         fprintf(stderr, "Usage: mtd [<options> ...] <command> [<arguments> ...] <device>[:<device>...]\n\n"
 635         "The device is in the format of mtdX (eg: mtd4) or its label.\n"
 636         "mtd recognizes these commands:\n"
 637         "        unlock                  unlock the device\n"
 638         "        refresh                 refresh mtd partition\n"
 639         "        erase                   erase all data on device\n"
 640         "        verify <imagefile>|-    verify <imagefile> (use - for stdin) to device\n"
 641         "        write <imagefile>|-     write <imagefile> (use - for stdin) to device\n"
 642         "        jffs2write <file>       append <file> to the jffs2 partition on the device\n");
 643         if (mtd_resetbc) {
 644             fprintf(stderr,
 645         "        resetbc <device>        reset the uboot boot counter\n");
 646         }
 647         if (mtd_fixtrx) {
 648             fprintf(stderr,
 649         "        fixtrx                  fix the checksum in a trx header on first boot\n");
 650         }
 651         if (mtd_fixseama) {
 652             fprintf(stderr,
 653         "        fixseama                fix the checksum in a seama header on first boot\n");
 654         }
 655         fprintf(stderr,
 656         "Following options are available:\n"
 657         "        -q                      quiet mode (once: no [w] on writing,\n"
 658         "                                           twice: no status messages)\n"
 659         "        -n                      write without first erasing the blocks\n"
 660         "        -r                      reboot after successful command\n"
 661         "        -f                      force write without trx checks\n"
 662         "        -e <device>             erase <device> before executing the command\n"
 663         "        -d <name>               directory for jffs2write, defaults to \"tmp\"\n"
 664         "        -j <name>               integrate <file> into jffs2 data when writing an image\n"
 665         "        -s <number>             skip the first n bytes when appending data to the jffs2 partiton, defaults to \"0\"\n"
 666         "        -p                      write beginning at partition offset\n"
 667         "        -l <length>             the length of data that we want to dump\n");
 668         if (mtd_fixtrx) {
 669             fprintf(stderr,
 670         "        -o offset               offset of the image header in the partition(for fixtrx)\n");
 671         }
 672         fprintf(stderr,
 673 #ifdef FIS_SUPPORT
 674         "        -F <part>[:<size>[:<entrypoint>]][,<part>...]\n"
 675         "                                alter the fis partition table to create new partitions replacing\n"
 676         "                                the partitions provided as argument to the write command\n"
 677         "                                (only valid together with the write command)\n"
 678 #endif
 679         "\n"
 680         "Example: To write linux.trx to mtd4 labeled as linux and reboot afterwards\n"
 681         "         mtd -r write linux.trx linux\n\n");
 682         exit(1);
 683 }
 684
 685 static void do_reboot(void)
 686 {
 687         fprintf(stderr, "Rebooting ...\n");
 688         fflush(stderr);
 689
 690         /* try regular reboot method first */
 691         system("/sbin/reboot");
 692         sleep(2);
 693
 694         /* if we're still alive at this point, force the kernel to reboot */
 695         syscall(SYS_reboot,LINUX_REBOOT_MAGIC1,LINUX_REBOOT_MAGIC2,LINUX_REBOOT_CMD_RESTART,NULL);
 696 }
 697
 698 int main (int argc, char **argv)
 699 {
 700         int ch, i, boot, imagefd = 0, force, unlocked;
 701         char *erase[MAX_ARGS], *device = NULL;
 702         char *fis_layout = NULL;
 703         size_t offset = 0, part_offset = 0, dump_len = 0;
 704         enum {
 705                 CMD_ERASE,
 706                 CMD_WRITE,
 707                 CMD_UNLOCK,
 708                 CMD_JFFS2WRITE,
 709                 CMD_FIXTRX,
 710                 CMD_FIXSEAMA,
 711                 CMD_VERIFY,
 712                 CMD_DUMP,
 713                 CMD_RESETBC,
 714         } cmd = -1;
 715
 716         erase[0] = NULL;
 717         boot = 0;
 718         force = 0;
 719         buflen = 0;
 720         quiet = 0;
 721         no_erase = 0;
 722
 723         while ((ch = getopt(argc, argv,
 724 #ifdef FIS_SUPPORT
 725                         "F:"
 726 #endif
 727                         "frnqe:d:s:j:p:o:l:")) != -1)
 728                 switch (ch) {
 729                         case 'f':
 730                                 force = 1;
 731                                 break;
 732                         case 'r':
 733                                 boot = 1;
 734                                 break;
 735                         case 'n':
 736                                 no_erase = 1;
 737                                 break;
 738                         case 'j':
 739                                 jffs2file = optarg;
 740                                 break;
 741                         case 's':
 742                                 errno = 0;
 743                                 jffs2_skip_bytes = strtoul(optarg, 0, 0);
 744                                 if (errno) {
 745                                                 fprintf(stderr, "-s: illegal numeric string\n");
 746                                                 usage();
 747                                 }
 748                                 break;
 749                         case 'q':
 750                                 quiet++;
 751                                 break;
 752                         case 'e':
 753                                 i = 0;
 754                                 while ((erase[i] != NULL) && ((i + 1) < MAX_ARGS))
 755                                         i++;
 756
 757                                 erase[i++] = optarg;
 758                                 erase[i] = NULL;
 759                                 break;
 760                         case 'd':
 761                                 jffs2dir = optarg;
 762                                 break;
 763                         case 'p':
 764                                 errno = 0;
 765                                 part_offset = strtoul(optarg, 0, 0);
 766                                 if (errno) {
 767                                         fprintf(stderr, "-p: illegal numeric string\n");
 768                                         usage();
 769                                 }
 770                                 break;
 771                         case 'l':
 772                                 errno = 0;
 773                                 dump_len = strtoul(optarg, 0, 0);
 774                                 if (errno) {
 775                                         fprintf(stderr, "-l: illegal numeric string\n");
 776                                         usage();
 777                                 }
 778                                 break;
 779                         case 'o':
 780                                 errno = 0;
 781                                 offset = strtoul(optarg, 0, 0);
 782                                 if (errno) {
 783                                         fprintf(stderr, "-o: illegal numeric string\n");
 784                                         usage();
 785                                 }
 786                                 break;
 787 #ifdef FIS_SUPPORT
 788                         case 'F':
 789                                 fis_layout = optarg;
 790                                 break;
 791 #endif
 792                         case '?':
 793                         default:
 794                                 usage();
 795                 }
 796         argc -= optind;
 797         argv += optind;
 798
 799         if (argc < 2)
 800                 usage();
 801
 802         if ((strcmp(argv[0], "unlock") == 0) && (argc == 2)) {
 803                 cmd = CMD_UNLOCK;
 804                 device = argv[1];
 805         } else if ((strcmp(argv[0], "erase") == 0) && (argc == 2)) {
 806                 cmd = CMD_ERASE;
 807                 device = argv[1];
 808         } else if (((strcmp(argv[0], "resetbc") == 0) && (argc == 2)) && mtd_resetbc) {
 809                 cmd = CMD_RESETBC;
 810                 device = argv[1];
 811         } else if (((strcmp(argv[0], "fixtrx") == 0) && (argc == 2)) && mtd_fixtrx) {
 812                 cmd = CMD_FIXTRX;
 813                 device = argv[1];
 814         } else if (((strcmp(argv[0], "fixseama") == 0) && (argc == 2)) && mtd_fixseama) {
 815                 cmd = CMD_FIXSEAMA;
 816                 device = argv[1];
 817         } else if ((strcmp(argv[0], "verify") == 0) && (argc == 3)) {
 818                 cmd = CMD_VERIFY;
 819                 imagefile = argv[1];
 820                 device = argv[2];
 821         } else if ((strcmp(argv[0], "dump") == 0) && (argc == 2)) {
 822                 cmd = CMD_DUMP;
 823                 device = argv[1];
 824         } else if ((strcmp(argv[0], "write") == 0) && (argc == 3)) {
 825                 cmd = CMD_WRITE;
 826                 device = argv[2];
 827
 828                 if (strcmp(argv[1], "-") == 0) {
 829                         imagefile = "<stdin>";
 830                         imagefd = 0;
 831                 } else {
 832                         imagefile = argv[1];
 833                         if ((imagefd = open(argv[1], O_RDONLY)) < 0) {
 834                                 fprintf(stderr, "Couldn't open image file: %s!\n", imagefile);
 835                                 exit(1);
 836                         }
 837                 }
 838
 839                 if (!mtd_check(device)) {
 840                         fprintf(stderr, "Can't open device for writing!\n");
 841                         exit(1);
 842                 }
 843                 /* check trx file before erasing or writing anything */
 844                 if (!image_check(imagefd, device) && !force) {
 845                         fprintf(stderr, "Image check failed.\n");
 846                         exit(1);
 847                 }
 848         } else if ((strcmp(argv[0], "jffs2write") == 0) && (argc == 3)) {
 849                 cmd = CMD_JFFS2WRITE;
 850                 device = argv[2];
 851
 852                 imagefile = argv[1];
 853                 if (!mtd_check(device)) {
 854                         fprintf(stderr, "Can't open device for writing!\n");
 855                         exit(1);
 856                 }
 857         } else {
 858                 usage();
 859         }
 860
 861         sync();
 862
 863         i = 0;
 864         unlocked = 0;
 865         while (erase[i] != NULL) {
 866                 mtd_unlock(erase[i]);
 867                 mtd_erase(erase[i]);
 868                 if (strcmp(erase[i], device) == 0)
 869                         unlocked = 1;
 870                 i++;
 871         }
 872
 873         switch (cmd) {
 874                 case CMD_UNLOCK:
 875                         if (!unlocked)
 876                                 mtd_unlock(device);
 877                         break;
 878                 case CMD_VERIFY:
 879                         mtd_verify(device, imagefile);
 880                         break;
 881                 case CMD_DUMP:
 882                         mtd_dump(device, offset, dump_len);
 883                         break;
 884                 case CMD_ERASE:
 885                         if (!unlocked)
 886                                 mtd_unlock(device);
 887                         mtd_erase(device);
 888                         break;
 889                 case CMD_WRITE:
 890                         if (!unlocked)
 891                                 mtd_unlock(device);
 892                         mtd_write(imagefd, device, fis_layout, part_offset);
 893                         break;
 894                 case CMD_JFFS2WRITE:
 895                         if (!unlocked)
 896                                 mtd_unlock(device);
 897                         mtd_write_jffs2(device, imagefile, jffs2dir);
 898                         break;
 899                 case CMD_FIXTRX:
 900                     if (mtd_fixtrx) {
 901                             mtd_fixtrx(device, offset);
 902             }
 903                 case CMD_RESETBC:
 904                     if (mtd_resetbc) {
 905                             mtd_resetbc(device);
 906             }
 907                 case CMD_FIXSEAMA:
 908                         if (mtd_fixseama)
 909                             mtd_fixseama(device, 0);
 910                         break;
 911         }
 912
 913         sync();
 914
 915         if (boot)
 916                 do_reboot();
 917
 918         return 0;
 919 }