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 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         buf = malloc(erasesize);
 296         if (!buf)
 297                 return -1;
 298
 299         do {
 300                 int len = (size > erasesize) ? (erasesize) : (size);
 301                 int rlen = read(fd, buf, len);
 302
 303                 if (rlen < 0) {
 304                         if (errno == EINTR)
 305                                 continue;
 306                         ret = -1;
 307                         goto out;
 308                 }
 309                 if (!rlen || rlen != len)
 310                         break;
 311                 if (mtd_block_is_bad(fd, offset)) {
 312                         fprintf(stderr, "skipping bad block at 0x%08x\n", offset);
 313                 } else {
 314                         size -= rlen;
 315                         write(1, buf, rlen);
 316                 }
 317                 offset += rlen;
 318         } while (size > 0);
 319
 320 out:
 321         close(fd);
 322         return ret;
 323 }
 324
 325 static int
 326 mtd_verify(const char *mtd, char *file)
 327 {
 328         uint32_t f_md5[4], m_md5[4];
 329         struct stat s;
 330         md5_ctx_t ctx;
 331         int ret = 0;
 332         int fd;
 333
 334         if (quiet < 2)
 335                 fprintf(stderr, "Verifying %s against %s ...\n", mtd, file);
 336
 337         if (stat(file, &s) || md5sum(file, f_md5)) {
 338                 fprintf(stderr, "Failed to hash %s\n", file);
 339                 return -1;
 340         }
 341
 342         fd = mtd_check_open(mtd);
 343         if(fd < 0) {
 344                 fprintf(stderr, "Could not open mtd device: %s\n", mtd);
 345                 return -1;
 346         }
 347
 348         md5_begin(&ctx);
 349         do {
 350                 char buf[256];
 351                 int len = (s.st_size > sizeof(buf)) ? (sizeof(buf)) : (s.st_size);
 352                 int rlen = read(fd, buf, len);
 353
 354                 if (rlen < 0) {
 355                         if (errno == EINTR)
 356                                 continue;
 357                         ret = -1;
 358                         goto out;
 359                 }
 360                 if (!rlen)
 361                         break;
 362                 md5_hash(buf, rlen, &ctx);
 363                 s.st_size -= rlen;
 364         } while (s.st_size > 0);
 365
 366         md5_end(m_md5, &ctx);
 367
 368         fprintf(stderr, "%08x%08x%08x%08x - %s\n", m_md5[0], m_md5[1], m_md5[2], m_md5[3], mtd);
 369         fprintf(stderr, "%08x%08x%08x%08x - %s\n", f_md5[0], f_md5[1], f_md5[2], f_md5[3], file);
 370
 371         ret = memcmp(f_md5, m_md5, sizeof(m_md5));
 372         if (!ret)
 373                 fprintf(stderr, "Success\n");
 374         else
 375                 fprintf(stderr, "Failed\n");
 376
 377 out:
 378         close(fd);
 379         return ret;
 380 }
 381
 382 static void
 383 indicate_writing(const char *mtd)
 384 {
 385         if (quiet < 2)
 386                 fprintf(stderr, "\nWriting from %s to %s ... ", imagefile, mtd);
 387
 388         if (!quiet)
 389                 fprintf(stderr, " [ ]");
 390 }
 391
 392 static int
 393 mtd_write(int imagefd, const char *mtd, char *fis_layout, size_t part_offset)
 394 {
 395         char *next = NULL;
 396         char *str = NULL;
 397         int fd, result;
 398         ssize_t r, w, e;
 399         ssize_t skip = 0;
 400         uint32_t offset = 0;
 401         int jffs2_replaced = 0;
 402         int skip_bad_blocks = 0;
 403
 404 #ifdef FIS_SUPPORT
 405         static struct fis_part new_parts[MAX_ARGS];
 406         static struct fis_part old_parts[MAX_ARGS];
 407         int n_new = 0, n_old = 0;
 408
 409         if (fis_layout) {
 410                 const char *tmp = mtd;
 411                 char *word, *brkt;
 412                 int ret;
 413
 414                 memset(&old_parts, 0, sizeof(old_parts));
 415                 memset(&new_parts, 0, sizeof(new_parts));
 416
 417                 do {
 418                         next = strchr(tmp, ':');
 419                         if (!next)
 420                                 next = (char *) tmp + strlen(tmp);
 421
 422                         memcpy(old_parts[n_old].name, tmp, next - tmp);
 423
 424                         n_old++;
 425                         tmp = next + 1;
 426                 } while(*next);
 427
 428                 for (word = strtok_r(fis_layout, ",", &brkt);
 429                      word;
 430                          word = strtok_r(NULL, ",", &brkt)) {
 431
 432                         tmp = strtok(word, ":");
 433                         strncpy((char *) new_parts[n_new].name, tmp, sizeof(new_parts[n_new].name) - 1);
 434
 435                         tmp = strtok(NULL, ":");
 436                         if (!tmp)
 437                                 goto next;
 438
 439                         new_parts[n_new].size = strtoul(tmp, NULL, 0);
 440
 441                         tmp = strtok(NULL, ":");
 442                         if (!tmp)
 443                                 goto next;
 444
 445                         new_parts[n_new].loadaddr = strtoul(tmp, NULL, 16);
 446 next:
 447                         n_new++;
 448                 }
 449                 ret = fis_validate(old_parts, n_old, new_parts, n_new);
 450                 if (ret < 0) {
 451                         fprintf(stderr, "Failed to validate the new FIS partition table\n");
 452                         exit(1);
 453                 }
 454                 if (ret == 0)
 455                         fis_layout = NULL;
 456         }
 457 #endif
 458
 459         if (strchr(mtd, ':')) {
 460                 str = strdup(mtd);
 461                 mtd = str;
 462         }
 463
 464         r = 0;
 465
 466 resume:
 467         next = strchr(mtd, ':');
 468         if (next) {
 469                 *next = 0;
 470                 next++;
 471         }
 472
 473         fd = mtd_check_open(mtd);
 474         if(fd < 0) {
 475                 fprintf(stderr, "Could not open mtd device: %s\n", mtd);
 476                 exit(1);
 477         }
 478         if (part_offset > 0) {
 479                 fprintf(stderr, "Seeking on mtd device '%s' to: %zu\n", mtd, part_offset);
 480                 lseek(fd, part_offset, SEEK_SET);
 481         }
 482
 483         indicate_writing(mtd);
 484
 485         w = e = 0;
 486         for (;;) {
 487                 /* buffer may contain data already (from trx check or last mtd partition write attempt) */
 488                 while (buflen < erasesize) {
 489                         r = read(imagefd, buf + buflen, erasesize - buflen);
 490                         if (r < 0) {
 491                                 if ((errno == EINTR) || (errno == EAGAIN))
 492                                         continue;
 493                                 else {
 494                                         perror("read");
 495                                         break;
 496                                 }
 497                         }
 498
 499                         if (r == 0)
 500                                 break;
 501
 502                         buflen += r;
 503                 }
 504
 505                 if (buflen == 0)
 506                         break;
 507
 508                 if (buflen < erasesize) {
 509                         /* Pad block to eraseblock size */
 510                         memset(&buf[buflen], 0xff, erasesize - buflen);
 511                         buflen = erasesize;
 512                 }
 513
 514                 if (skip > 0) {
 515                         skip -= buflen;
 516                         buflen = 0;
 517                         if (skip <= 0)
 518                                 indicate_writing(mtd);
 519
 520                         continue;
 521                 }
 522
 523                 if (jffs2file && w >= jffs2_skip_bytes) {
 524                         if (memcmp(buf, JFFS2_EOF, sizeof(JFFS2_EOF) - 1) == 0) {
 525                                 if (!quiet)
 526                                         fprintf(stderr, "\b\b\b   ");
 527                                 if (quiet < 2)
 528                                         fprintf(stderr, "\nAppending jffs2 data from %s to %s...", jffs2file, mtd);
 529                                 /* got an EOF marker - this is the place to add some jffs2 data */
 530                                 skip = mtd_replace_jffs2(mtd, fd, e, jffs2file);
 531                                 jffs2_replaced = 1;
 532
 533                                 /* don't add it again */
 534                                 jffs2file = NULL;
 535
 536                                 w += skip;
 537                                 e += skip;
 538                                 skip -= buflen;
 539                                 buflen = 0;
 540                                 offset = 0;
 541                                 continue;
 542                         }
 543                         /* no EOF marker, make sure we figure out the last inode number
 544                          * before appending some data */
 545                         mtd_parse_jffs2data(buf, jffs2dir);
 546                 }
 547
 548                 /* need to erase the next block before writing data to it */
 549                 if(!no_erase)
 550                 {
 551                         while (w + buflen > e - skip_bad_blocks) {
 552                                 if (!quiet)
 553                                         fprintf(stderr, "\b\b\b[e]");
 554
 555                                 if (mtd_block_is_bad(fd, e)) {
 556                                         if (!quiet)
 557                                                 fprintf(stderr, "\nSkipping bad block at 0x%08zx   ", e);
 558
 559                                         skip_bad_blocks += erasesize;
 560                                         e += erasesize;
 561
 562                                         // Move the file pointer along over the bad block.
 563                                         lseek(fd, erasesize, SEEK_CUR);
 564                                         continue;
 565                                 }
 566
 567                                 if (mtd_erase_block(fd, e) < 0) {
 568                                         if (next) {
 569                                                 if (w < e) {
 570                                                         write(fd, buf + offset, e - w);
 571                                                         offset = e - w;
 572                                                 }
 573                                                 w = 0;
 574                                                 e = 0;
 575                                                 close(fd);
 576                                                 mtd = next;
 577                                                 fprintf(stderr, "\b\b\b   \n");
 578                                                 goto resume;
 579                                         } else {
 580                                                 fprintf(stderr, "Failed to erase block\n");
 581                                                 exit(1);
 582                                         }
 583                                 }
 584
 585                                 /* erase the chunk */
 586                                 e += erasesize;
 587                         }
 588                 }
 589
 590                 if (!quiet)
 591                         fprintf(stderr, "\b\b\b[w]");
 592
 593                 if ((result = write(fd, buf + offset, buflen)) < buflen) {
 594                         if (result < 0) {
 595                                 fprintf(stderr, "Error writing image.\n");
 596                                 exit(1);
 597                         } else {
 598                                 fprintf(stderr, "Insufficient space.\n");
 599                                 exit(1);
 600                         }
 601                 }
 602                 w += buflen;
 603
 604                 buflen = 0;
 605                 offset = 0;
 606         }
 607
 608         if (jffs2_replaced && trx_fixup) {
 609                 trx_fixup(fd, mtd);
 610         }
 611
 612         if (!quiet)
 613                 fprintf(stderr, "\b\b\b\b    ");
 614
 615         if (quiet < 2)
 616                 fprintf(stderr, "\n");
 617
 618 #ifdef FIS_SUPPORT
 619         if (fis_layout) {
 620                 if (fis_remap(old_parts, n_old, new_parts, n_new) < 0)
 621                         fprintf(stderr, "Failed to update the FIS partition table\n");
 622         }
 623 #endif
 624
 625         close(fd);
 626         return 0;
 627 }
 628
 629 static void usage(void)
 630 {
 631         fprintf(stderr, "Usage: mtd [<options> ...] <command> [<arguments> ...] <device>[:<device>...]\n\n"
 632         "The device is in the format of mtdX (eg: mtd4) or its label.\n"
 633         "mtd recognizes these commands:\n"
 634         "        unlock                  unlock the device\n"
 635         "        refresh                 refresh mtd partition\n"
 636         "        erase                   erase all data on device\n"
 637         "        verify <imagefile>|-    verify <imagefile> (use - for stdin) to device\n"
 638         "        write <imagefile>|-     write <imagefile> (use - for stdin) to device\n"
 639         "        jffs2write <file>       append <file> to the jffs2 partition on the device\n");
 640         if (mtd_fixtrx) {
 641             fprintf(stderr,
 642         "        fixtrx                  fix the checksum in a trx header on first boot\n");
 643         }
 644         if (mtd_fixseama) {
 645             fprintf(stderr,
 646         "        fixseama                fix the checksum in a seama header on first boot\n");
 647         }
 648         fprintf(stderr,
 649         "Following options are available:\n"
 650         "        -q                      quiet mode (once: no [w] on writing,\n"
 651         "                                           twice: no status messages)\n"
 652         "        -n                      write without first erasing the blocks\n"
 653         "        -r                      reboot after successful command\n"
 654         "        -f                      force write without trx checks\n"
 655         "        -e <device>             erase <device> before executing the command\n"
 656         "        -d <name>               directory for jffs2write, defaults to \"tmp\"\n"
 657         "        -j <name>               integrate <file> into jffs2 data when writing an image\n"
 658         "        -s <number>             skip the first n bytes when appending data to the jffs2 partiton, defaults to \"0\"\n"
 659         "        -p                      write beginning at partition offset\n"
 660         "        -l <length>             the length of data that we want to dump\n");
 661         if (mtd_fixtrx) {
 662             fprintf(stderr,
 663         "        -o offset               offset of the image header in the partition(for fixtrx)\n");
 664         }
 665         fprintf(stderr,
 666 #ifdef FIS_SUPPORT
 667         "        -F <part>[:<size>[:<entrypoint>]][,<part>...]\n"
 668         "                                alter the fis partition table to create new partitions replacing\n"
 669         "                                the partitions provided as argument to the write command\n"
 670         "                                (only valid together with the write command)\n"
 671 #endif
 672         "\n"
 673         "Example: To write linux.trx to mtd4 labeled as linux and reboot afterwards\n"
 674         "         mtd -r write linux.trx linux\n\n");
 675         exit(1);
 676 }
 677
 678 static void do_reboot(void)
 679 {
 680         fprintf(stderr, "Rebooting ...\n");
 681         fflush(stderr);
 682
 683         /* try regular reboot method first */
 684         system("/sbin/reboot");
 685         sleep(2);
 686
 687         /* if we're still alive at this point, force the kernel to reboot */
 688         syscall(SYS_reboot,LINUX_REBOOT_MAGIC1,LINUX_REBOOT_MAGIC2,LINUX_REBOOT_CMD_RESTART,NULL);
 689 }
 690
 691 int main (int argc, char **argv)
 692 {
 693         int ch, i, boot, imagefd = 0, force, unlocked;
 694         char *erase[MAX_ARGS], *device = NULL;
 695         char *fis_layout = NULL;
 696         size_t offset = 0, part_offset = 0, dump_len = 0;
 697         enum {
 698                 CMD_ERASE,
 699                 CMD_WRITE,
 700                 CMD_UNLOCK,
 701                 CMD_JFFS2WRITE,
 702                 CMD_FIXTRX,
 703                 CMD_FIXSEAMA,
 704                 CMD_VERIFY,
 705                 CMD_DUMP,
 706         } cmd = -1;
 707
 708         erase[0] = NULL;
 709         boot = 0;
 710         force = 0;
 711         buflen = 0;
 712         quiet = 0;
 713         no_erase = 0;
 714
 715         while ((ch = getopt(argc, argv,
 716 #ifdef FIS_SUPPORT
 717                         "F:"
 718 #endif
 719                         "frnqe:d:s:j:p:o:l:")) != -1)
 720                 switch (ch) {
 721                         case 'f':
 722                                 force = 1;
 723                                 break;
 724                         case 'r':
 725                                 boot = 1;
 726                                 break;
 727                         case 'n':
 728                                 no_erase = 1;
 729                                 break;
 730                         case 'j':
 731                                 jffs2file = optarg;
 732                                 break;
 733                         case 's':
 734                                 errno = 0;
 735                                 jffs2_skip_bytes = strtoul(optarg, 0, 0);
 736                                 if (errno) {
 737                                                 fprintf(stderr, "-s: illegal numeric string\n");
 738                                                 usage();
 739                                 }
 740                                 break;
 741                         case 'q':
 742                                 quiet++;
 743                                 break;
 744                         case 'e':
 745                                 i = 0;
 746                                 while ((erase[i] != NULL) && ((i + 1) < MAX_ARGS))
 747                                         i++;
 748
 749                                 erase[i++] = optarg;
 750                                 erase[i] = NULL;
 751                                 break;
 752                         case 'd':
 753                                 jffs2dir = optarg;
 754                                 break;
 755                         case 'p':
 756                                 errno = 0;
 757                                 part_offset = strtoul(optarg, 0, 0);
 758                                 if (errno) {
 759                                         fprintf(stderr, "-p: illegal numeric string\n");
 760                                         usage();
 761                                 }
 762                                 break;
 763                         case 'l':
 764                                 errno = 0;
 765                                 dump_len = strtoul(optarg, 0, 0);
 766                                 if (errno) {
 767                                         fprintf(stderr, "-l: illegal numeric string\n");
 768                                         usage();
 769                                 }
 770                                 break;
 771                         case 'o':
 772                                 if (!mtd_fixtrx) {
 773                                         fprintf(stderr, "-o: is not available on this platform\n");
 774                                         usage();
 775                                 }
 776                                 errno = 0;
 777                                 offset = strtoul(optarg, 0, 0);
 778                                 if (errno) {
 779                                         fprintf(stderr, "-o: illegal numeric string\n");
 780                                         usage();
 781                                 }
 782                                 break;
 783 #ifdef FIS_SUPPORT
 784                         case 'F':
 785                                 fis_layout = optarg;
 786                                 break;
 787 #endif
 788                         case '?':
 789                         default:
 790                                 usage();
 791                 }
 792         argc -= optind;
 793         argv += optind;
 794
 795         if (argc < 2)
 796                 usage();
 797
 798         if ((strcmp(argv[0], "unlock") == 0) && (argc == 2)) {
 799                 cmd = CMD_UNLOCK;
 800                 device = argv[1];
 801         } else if ((strcmp(argv[0], "erase") == 0) && (argc == 2)) {
 802                 cmd = CMD_ERASE;
 803                 device = argv[1];
 804         } else if (((strcmp(argv[0], "fixtrx") == 0) && (argc == 2)) && mtd_fixtrx) {
 805                 cmd = CMD_FIXTRX;
 806                 device = argv[1];
 807         } else if (((strcmp(argv[0], "fixseama") == 0) && (argc == 2)) && mtd_fixseama) {
 808                 cmd = CMD_FIXSEAMA;
 809                 device = argv[1];
 810         } else if ((strcmp(argv[0], "verify") == 0) && (argc == 3)) {
 811                 cmd = CMD_VERIFY;
 812                 imagefile = argv[1];
 813                 device = argv[2];
 814         } else if ((strcmp(argv[0], "dump") == 0) && (argc == 2)) {
 815                 cmd = CMD_DUMP;
 816                 device = argv[1];
 817         } else if ((strcmp(argv[0], "write") == 0) && (argc == 3)) {
 818                 cmd = CMD_WRITE;
 819                 device = argv[2];
 820
 821                 if (strcmp(argv[1], "-") == 0) {
 822                         imagefile = "<stdin>";
 823                         imagefd = 0;
 824                 } else {
 825                         imagefile = argv[1];
 826                         if ((imagefd = open(argv[1], O_RDONLY)) < 0) {
 827                                 fprintf(stderr, "Couldn't open image file: %s!\n", imagefile);
 828                                 exit(1);
 829                         }
 830                 }
 831
 832                 if (!mtd_check(device)) {
 833                         fprintf(stderr, "Can't open device for writing!\n");
 834                         exit(1);
 835                 }
 836                 /* check trx file before erasing or writing anything */
 837                 if (!image_check(imagefd, device) && !force) {
 838                         fprintf(stderr, "Image check failed.\n");
 839                         exit(1);
 840                 }
 841         } else if ((strcmp(argv[0], "jffs2write") == 0) && (argc == 3)) {
 842                 cmd = CMD_JFFS2WRITE;
 843                 device = argv[2];
 844
 845                 imagefile = argv[1];
 846                 if (!mtd_check(device)) {
 847                         fprintf(stderr, "Can't open device for writing!\n");
 848                         exit(1);
 849                 }
 850         } else {
 851                 usage();
 852         }
 853
 854         sync();
 855
 856         i = 0;
 857         unlocked = 0;
 858         while (erase[i] != NULL) {
 859                 mtd_unlock(erase[i]);
 860                 mtd_erase(erase[i]);
 861                 if (strcmp(erase[i], device) == 0)
 862                         unlocked = 1;
 863                 i++;
 864         }
 865
 866         switch (cmd) {
 867                 case CMD_UNLOCK:
 868                         if (!unlocked)
 869                                 mtd_unlock(device);
 870                         break;
 871                 case CMD_VERIFY:
 872                         mtd_verify(device, imagefile);
 873                         break;
 874                 case CMD_DUMP:
 875                         mtd_dump(device, dump_len);
 876                         break;
 877                 case CMD_ERASE:
 878                         if (!unlocked)
 879                                 mtd_unlock(device);
 880                         mtd_erase(device);
 881                         break;
 882                 case CMD_WRITE:
 883                         if (!unlocked)
 884                                 mtd_unlock(device);
 885                         mtd_write(imagefd, device, fis_layout, part_offset);
 886                         break;
 887                 case CMD_JFFS2WRITE:
 888                         if (!unlocked)
 889                                 mtd_unlock(device);
 890                         mtd_write_jffs2(device, imagefile, jffs2dir);
 891                         break;
 892                 case CMD_FIXTRX:
 893                     if (mtd_fixtrx) {
 894                             mtd_fixtrx(device, offset);
 895             }
 896                 case CMD_FIXSEAMA:
 897                         if (mtd_fixseama)
 898                             mtd_fixseama(device, 0);
 899                         break;
 900         }
 901
 902         sync();
 903
 904         if (boot)
 905                 do_reboot();
 906
 907         return 0;
 908 }