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;
 280         int fd;
 281
 282         if (quiet < 2)
 283                 fprintf(stderr, "Dumping %s ...\n", mtd);
 284
 285         fd = mtd_check_open(mtd);
 286         if(fd < 0) {
 287                 fprintf(stderr, "Could not open mtd device: %s\n", mtd);
 288                 return -1;
 289         }
 290
 291         do {
 292                 char buf[256];
 293                 int len = (size > sizeof(buf)) ? (sizeof(buf)) : (size);
 294                 int rlen = read(fd, buf, len);
 295
 296                 if (rlen < 0) {
 297                         if (errno == EINTR)
 298                                 continue;
 299                         ret = -1;
 300                         goto out;
 301                 }
 302                 if (!rlen)
 303                         break;
 304                 write(1, buf, rlen);
 305         } while (size > 0);
 306
 307 out:
 308         close(fd);
 309         return ret;
 310 }
 311
 312 static int
 313 mtd_verify(const char *mtd, char *file)
 314 {
 315         uint32_t f_md5[4], m_md5[4];
 316         struct stat s;
 317         md5_ctx_t ctx;
 318         int ret = 0;
 319         int fd;
 320
 321         if (quiet < 2)
 322                 fprintf(stderr, "Verifying %s against %s ...\n", mtd, file);
 323
 324         if (stat(file, &s) || md5sum(file, f_md5)) {
 325                 fprintf(stderr, "Failed to hash %s\n", file);
 326                 return -1;
 327         }
 328
 329         fd = mtd_check_open(mtd);
 330         if(fd < 0) {
 331                 fprintf(stderr, "Could not open mtd device: %s\n", mtd);
 332                 return -1;
 333         }
 334
 335         md5_begin(&ctx);
 336         do {
 337                 char buf[256];
 338                 int len = (s.st_size > sizeof(buf)) ? (sizeof(buf)) : (s.st_size);
 339                 int rlen = read(fd, buf, len);
 340
 341                 if (rlen < 0) {
 342                         if (errno == EINTR)
 343                                 continue;
 344                         ret = -1;
 345                         goto out;
 346                 }
 347                 if (!rlen)
 348                         break;
 349                 md5_hash(buf, rlen, &ctx);
 350                 s.st_size -= rlen;
 351         } while (s.st_size > 0);
 352
 353         md5_end(m_md5, &ctx);
 354
 355         fprintf(stderr, "%08x%08x%08x%08x - %s\n", m_md5[0], m_md5[1], m_md5[2], m_md5[3], mtd);
 356         fprintf(stderr, "%08x%08x%08x%08x - %s\n", f_md5[0], f_md5[1], f_md5[2], f_md5[3], file);
 357
 358         ret = memcmp(f_md5, m_md5, sizeof(m_md5));
 359         if (!ret)
 360                 fprintf(stderr, "Success\n");
 361         else
 362                 fprintf(stderr, "Failed\n");
 363
 364 out:
 365         close(fd);
 366         return ret;
 367 }
 368
 369 static void
 370 indicate_writing(const char *mtd)
 371 {
 372         if (quiet < 2)
 373                 fprintf(stderr, "\nWriting from %s to %s ... ", imagefile, mtd);
 374
 375         if (!quiet)
 376                 fprintf(stderr, " [ ]");
 377 }
 378
 379 static int
 380 mtd_write(int imagefd, const char *mtd, char *fis_layout, size_t part_offset)
 381 {
 382         char *next = NULL;
 383         char *str = NULL;
 384         int fd, result;
 385         ssize_t r, w, e;
 386         ssize_t skip = 0;
 387         uint32_t offset = 0;
 388         int jffs2_replaced = 0;
 389         int skip_bad_blocks = 0;
 390
 391 #ifdef FIS_SUPPORT
 392         static struct fis_part new_parts[MAX_ARGS];
 393         static struct fis_part old_parts[MAX_ARGS];
 394         int n_new = 0, n_old = 0;
 395
 396         if (fis_layout) {
 397                 const char *tmp = mtd;
 398                 char *word, *brkt;
 399                 int ret;
 400
 401                 memset(&old_parts, 0, sizeof(old_parts));
 402                 memset(&new_parts, 0, sizeof(new_parts));
 403
 404                 do {
 405                         next = strchr(tmp, ':');
 406                         if (!next)
 407                                 next = (char *) tmp + strlen(tmp);
 408
 409                         memcpy(old_parts[n_old].name, tmp, next - tmp);
 410
 411                         n_old++;
 412                         tmp = next + 1;
 413                 } while(*next);
 414
 415                 for (word = strtok_r(fis_layout, ",", &brkt);
 416                      word;
 417                          word = strtok_r(NULL, ",", &brkt)) {
 418
 419                         tmp = strtok(word, ":");
 420                         strncpy((char *) new_parts[n_new].name, tmp, sizeof(new_parts[n_new].name) - 1);
 421
 422                         tmp = strtok(NULL, ":");
 423                         if (!tmp)
 424                                 goto next;
 425
 426                         new_parts[n_new].size = strtoul(tmp, NULL, 0);
 427
 428                         tmp = strtok(NULL, ":");
 429                         if (!tmp)
 430                                 goto next;
 431
 432                         new_parts[n_new].loadaddr = strtoul(tmp, NULL, 16);
 433 next:
 434                         n_new++;
 435                 }
 436                 ret = fis_validate(old_parts, n_old, new_parts, n_new);
 437                 if (ret < 0) {
 438                         fprintf(stderr, "Failed to validate the new FIS partition table\n");
 439                         exit(1);
 440                 }
 441                 if (ret == 0)
 442                         fis_layout = NULL;
 443         }
 444 #endif
 445
 446         if (strchr(mtd, ':')) {
 447                 str = strdup(mtd);
 448                 mtd = str;
 449         }
 450
 451         r = 0;
 452
 453 resume:
 454         next = strchr(mtd, ':');
 455         if (next) {
 456                 *next = 0;
 457                 next++;
 458         }
 459
 460         fd = mtd_check_open(mtd);
 461         if(fd < 0) {
 462                 fprintf(stderr, "Could not open mtd device: %s\n", mtd);
 463                 exit(1);
 464         }
 465         if (part_offset > 0) {
 466                 fprintf(stderr, "Seeking on mtd device '%s' to: %zu\n", mtd, part_offset);
 467                 lseek(fd, part_offset, SEEK_SET);
 468         }
 469
 470         indicate_writing(mtd);
 471
 472         w = e = 0;
 473         for (;;) {
 474                 /* buffer may contain data already (from trx check or last mtd partition write attempt) */
 475                 while (buflen < erasesize) {
 476                         r = read(imagefd, buf + buflen, erasesize - buflen);
 477                         if (r < 0) {
 478                                 if ((errno == EINTR) || (errno == EAGAIN))
 479                                         continue;
 480                                 else {
 481                                         perror("read");
 482                                         break;
 483                                 }
 484                         }
 485
 486                         if (r == 0)
 487                                 break;
 488
 489                         buflen += r;
 490                 }
 491
 492                 if (buflen == 0)
 493                         break;
 494
 495                 if (buflen < erasesize) {
 496                         /* Pad block to eraseblock size */
 497                         memset(&buf[buflen], 0xff, erasesize - buflen);
 498                         buflen = erasesize;
 499                 }
 500
 501                 if (skip > 0) {
 502                         skip -= buflen;
 503                         buflen = 0;
 504                         if (skip <= 0)
 505                                 indicate_writing(mtd);
 506
 507                         continue;
 508                 }
 509
 510                 if (jffs2file && w >= jffs2_skip_bytes) {
 511                         if (memcmp(buf, JFFS2_EOF, sizeof(JFFS2_EOF) - 1) == 0) {
 512                                 if (!quiet)
 513                                         fprintf(stderr, "\b\b\b   ");
 514                                 if (quiet < 2)
 515                                         fprintf(stderr, "\nAppending jffs2 data from %s to %s...", jffs2file, mtd);
 516                                 /* got an EOF marker - this is the place to add some jffs2 data */
 517                                 skip = mtd_replace_jffs2(mtd, fd, e, jffs2file);
 518                                 jffs2_replaced = 1;
 519
 520                                 /* don't add it again */
 521                                 jffs2file = NULL;
 522
 523                                 w += skip;
 524                                 e += skip;
 525                                 skip -= buflen;
 526                                 buflen = 0;
 527                                 offset = 0;
 528                                 continue;
 529                         }
 530                         /* no EOF marker, make sure we figure out the last inode number
 531                          * before appending some data */
 532                         mtd_parse_jffs2data(buf, jffs2dir);
 533                 }
 534
 535                 /* need to erase the next block before writing data to it */
 536                 if(!no_erase)
 537                 {
 538                         while (w + buflen > e - skip_bad_blocks) {
 539                                 if (!quiet)
 540                                         fprintf(stderr, "\b\b\b[e]");
 541
 542                                 if (mtd_block_is_bad(fd, e)) {
 543                                         if (!quiet)
 544                                                 fprintf(stderr, "\nSkipping bad block at 0x%08zx   ", e);
 545
 546                                         skip_bad_blocks += erasesize;
 547                                         e += erasesize;
 548
 549                                         // Move the file pointer along over the bad block.
 550                                         lseek(fd, erasesize, SEEK_CUR);
 551                                         continue;
 552                                 }
 553
 554                                 if (mtd_erase_block(fd, e) < 0) {
 555                                         if (next) {
 556                                                 if (w < e) {
 557                                                         write(fd, buf + offset, e - w);
 558                                                         offset = e - w;
 559                                                 }
 560                                                 w = 0;
 561                                                 e = 0;
 562                                                 close(fd);
 563                                                 mtd = next;
 564                                                 fprintf(stderr, "\b\b\b   \n");
 565                                                 goto resume;
 566                                         } else {
 567                                                 fprintf(stderr, "Failed to erase block\n");
 568                                                 exit(1);
 569                                         }
 570                                 }
 571
 572                                 /* erase the chunk */
 573                                 e += erasesize;
 574                         }
 575                 }
 576
 577                 if (!quiet)
 578                         fprintf(stderr, "\b\b\b[w]");
 579
 580                 if ((result = write(fd, buf + offset, buflen)) < buflen) {
 581                         if (result < 0) {
 582                                 fprintf(stderr, "Error writing image.\n");
 583                                 exit(1);
 584                         } else {
 585                                 fprintf(stderr, "Insufficient space.\n");
 586                                 exit(1);
 587                         }
 588                 }
 589                 w += buflen;
 590
 591                 buflen = 0;
 592                 offset = 0;
 593         }
 594
 595         if (jffs2_replaced && trx_fixup) {
 596                 trx_fixup(fd, mtd);
 597         }
 598
 599         if (!quiet)
 600                 fprintf(stderr, "\b\b\b\b    ");
 601
 602         if (quiet < 2)
 603                 fprintf(stderr, "\n");
 604
 605 #ifdef FIS_SUPPORT
 606         if (fis_layout) {
 607                 if (fis_remap(old_parts, n_old, new_parts, n_new) < 0)
 608                         fprintf(stderr, "Failed to update the FIS partition table\n");
 609         }
 610 #endif
 611
 612         close(fd);
 613         return 0;
 614 }
 615
 616 static void usage(void)
 617 {
 618         fprintf(stderr, "Usage: mtd [<options> ...] <command> [<arguments> ...] <device>[:<device>...]\n\n"
 619         "The device is in the format of mtdX (eg: mtd4) or its label.\n"
 620         "mtd recognizes these commands:\n"
 621         "        unlock                  unlock the device\n"
 622         "        refresh                 refresh mtd partition\n"
 623         "        erase                   erase all data on device\n"
 624         "        verify <imagefile>|-    verify <imagefile> (use - for stdin) to device\n"
 625         "        write <imagefile>|-     write <imagefile> (use - for stdin) to device\n"
 626         "        jffs2write <file>       append <file> to the jffs2 partition on the device\n");
 627         if (mtd_fixtrx) {
 628             fprintf(stderr,
 629         "        fixtrx                  fix the checksum in a trx header on first boot\n");
 630         }
 631         if (mtd_fixseama) {
 632             fprintf(stderr,
 633         "        fixseama                fix the checksum in a seama header on first boot\n");
 634         }
 635         fprintf(stderr,
 636         "Following options are available:\n"
 637         "        -q                      quiet mode (once: no [w] on writing,\n"
 638         "                                           twice: no status messages)\n"
 639         "        -n                      write without first erasing the blocks\n"
 640         "        -r                      reboot after successful command\n"
 641         "        -f                      force write without trx checks\n"
 642         "        -e <device>             erase <device> before executing the command\n"
 643         "        -d <name>               directory for jffs2write, defaults to \"tmp\"\n"
 644         "        -j <name>               integrate <file> into jffs2 data when writing an image\n"
 645         "        -s <number>             skip the first n bytes when appending data to the jffs2 partiton, defaults to \"0\"\n"
 646         "        -p                      write beginning at partition offset\n"
 647         "        -l <length>             the length of data that we want to dump\n");
 648         if (mtd_fixtrx) {
 649             fprintf(stderr,
 650         "        -o offset               offset of the image header in the partition(for fixtrx)\n");
 651         }
 652         fprintf(stderr,
 653 #ifdef FIS_SUPPORT
 654         "        -F <part>[:<size>[:<entrypoint>]][,<part>...]\n"
 655         "                                alter the fis partition table to create new partitions replacing\n"
 656         "                                the partitions provided as argument to the write command\n"
 657         "                                (only valid together with the write command)\n"
 658 #endif
 659         "\n"
 660         "Example: To write linux.trx to mtd4 labeled as linux and reboot afterwards\n"
 661         "         mtd -r write linux.trx linux\n\n");
 662         exit(1);
 663 }
 664
 665 static void do_reboot(void)
 666 {
 667         fprintf(stderr, "Rebooting ...\n");
 668         fflush(stderr);
 669
 670         /* try regular reboot method first */
 671         system("/sbin/reboot");
 672         sleep(2);
 673
 674         /* if we're still alive at this point, force the kernel to reboot */
 675         syscall(SYS_reboot,LINUX_REBOOT_MAGIC1,LINUX_REBOOT_MAGIC2,LINUX_REBOOT_CMD_RESTART,NULL);
 676 }
 677
 678 int main (int argc, char **argv)
 679 {
 680         int ch, i, boot, imagefd = 0, force, unlocked;
 681         char *erase[MAX_ARGS], *device = NULL;
 682         char *fis_layout = NULL;
 683         size_t offset = 0, part_offset = 0, dump_len = 0;
 684         enum {
 685                 CMD_ERASE,
 686                 CMD_WRITE,
 687                 CMD_UNLOCK,
 688                 CMD_JFFS2WRITE,
 689                 CMD_FIXTRX,
 690                 CMD_FIXSEAMA,
 691                 CMD_VERIFY,
 692                 CMD_DUMP,
 693         } cmd = -1;
 694
 695         erase[0] = NULL;
 696         boot = 0;
 697         force = 0;
 698         buflen = 0;
 699         quiet = 0;
 700         no_erase = 0;
 701
 702         while ((ch = getopt(argc, argv,
 703 #ifdef FIS_SUPPORT
 704                         "F:"
 705 #endif
 706                         "frnqe:d:s:j:p:o:l:")) != -1)
 707                 switch (ch) {
 708                         case 'f':
 709                                 force = 1;
 710                                 break;
 711                         case 'r':
 712                                 boot = 1;
 713                                 break;
 714                         case 'n':
 715                                 no_erase = 1;
 716                                 break;
 717                         case 'j':
 718                                 jffs2file = optarg;
 719                                 break;
 720                         case 's':
 721                                 errno = 0;
 722                                 jffs2_skip_bytes = strtoul(optarg, 0, 0);
 723                                 if (errno) {
 724                                                 fprintf(stderr, "-s: illegal numeric string\n");
 725                                                 usage();
 726                                 }
 727                                 break;
 728                         case 'q':
 729                                 quiet++;
 730                                 break;
 731                         case 'e':
 732                                 i = 0;
 733                                 while ((erase[i] != NULL) && ((i + 1) < MAX_ARGS))
 734                                         i++;
 735
 736                                 erase[i++] = optarg;
 737                                 erase[i] = NULL;
 738                                 break;
 739                         case 'd':
 740                                 jffs2dir = optarg;
 741                                 break;
 742                         case 'p':
 743                                 errno = 0;
 744                                 part_offset = strtoul(optarg, 0, 0);
 745                                 if (errno) {
 746                                         fprintf(stderr, "-p: illegal numeric string\n");
 747                                         usage();
 748                                 }
 749                                 break;
 750                         case 'l':
 751                                 errno = 0;
 752                                 dump_len = strtoul(optarg, 0, 0);
 753                                 if (errno) {
 754                                         fprintf(stderr, "-l: illegal numeric string\n");
 755                                         usage();
 756                                 }
 757                                 break;
 758                         case 'o':
 759                                 if (!mtd_fixtrx) {
 760                                         fprintf(stderr, "-o: is not available on this platform\n");
 761                                         usage();
 762                                 }
 763                                 errno = 0;
 764                                 offset = strtoul(optarg, 0, 0);
 765                                 if (errno) {
 766                                         fprintf(stderr, "-o: illegal numeric string\n");
 767                                         usage();
 768                                 }
 769                                 break;
 770 #ifdef FIS_SUPPORT
 771                         case 'F':
 772                                 fis_layout = optarg;
 773                                 break;
 774 #endif
 775                         case '?':
 776                         default:
 777                                 usage();
 778                 }
 779         argc -= optind;
 780         argv += optind;
 781
 782         if (argc < 2)
 783                 usage();
 784
 785         if ((strcmp(argv[0], "unlock") == 0) && (argc == 2)) {
 786                 cmd = CMD_UNLOCK;
 787                 device = argv[1];
 788         } else if ((strcmp(argv[0], "erase") == 0) && (argc == 2)) {
 789                 cmd = CMD_ERASE;
 790                 device = argv[1];
 791         } else if (((strcmp(argv[0], "fixtrx") == 0) && (argc == 2)) && mtd_fixtrx) {
 792                 cmd = CMD_FIXTRX;
 793                 device = argv[1];
 794         } else if (((strcmp(argv[0], "fixseama") == 0) && (argc == 2)) && mtd_fixseama) {
 795                 cmd = CMD_FIXSEAMA;
 796                 device = argv[1];
 797         } else if ((strcmp(argv[0], "verify") == 0) && (argc == 3)) {
 798                 cmd = CMD_VERIFY;
 799                 imagefile = argv[1];
 800                 device = argv[2];
 801         } else if ((strcmp(argv[0], "dump") == 0) && (argc == 2)) {
 802                 cmd = CMD_DUMP;
 803                 device = argv[1];
 804         } else if ((strcmp(argv[0], "write") == 0) && (argc == 3)) {
 805                 cmd = CMD_WRITE;
 806                 device = argv[2];
 807
 808                 if (strcmp(argv[1], "-") == 0) {
 809                         imagefile = "<stdin>";
 810                         imagefd = 0;
 811                 } else {
 812                         imagefile = argv[1];
 813                         if ((imagefd = open(argv[1], O_RDONLY)) < 0) {
 814                                 fprintf(stderr, "Couldn't open image file: %s!\n", imagefile);
 815                                 exit(1);
 816                         }
 817                 }
 818
 819                 if (!mtd_check(device)) {
 820                         fprintf(stderr, "Can't open device for writing!\n");
 821                         exit(1);
 822                 }
 823                 /* check trx file before erasing or writing anything */
 824                 if (!image_check(imagefd, device) && !force) {
 825                         fprintf(stderr, "Image check failed.\n");
 826                         exit(1);
 827                 }
 828         } else if ((strcmp(argv[0], "jffs2write") == 0) && (argc == 3)) {
 829                 cmd = CMD_JFFS2WRITE;
 830                 device = argv[2];
 831
 832                 imagefile = argv[1];
 833                 if (!mtd_check(device)) {
 834                         fprintf(stderr, "Can't open device for writing!\n");
 835                         exit(1);
 836                 }
 837         } else {
 838                 usage();
 839         }
 840
 841         sync();
 842
 843         i = 0;
 844         unlocked = 0;
 845         while (erase[i] != NULL) {
 846                 mtd_unlock(erase[i]);
 847                 mtd_erase(erase[i]);
 848                 if (strcmp(erase[i], device) == 0)
 849                         unlocked = 1;
 850                 i++;
 851         }
 852
 853         switch (cmd) {
 854                 case CMD_UNLOCK:
 855                         if (!unlocked)
 856                                 mtd_unlock(device);
 857                         break;
 858                 case CMD_VERIFY:
 859                         mtd_verify(device, imagefile);
 860                         break;
 861                 case CMD_DUMP:
 862                         mtd_dump(device, dump_len);
 863                         break;
 864                 case CMD_ERASE:
 865                         if (!unlocked)
 866                                 mtd_unlock(device);
 867                         mtd_erase(device);
 868                         break;
 869                 case CMD_WRITE:
 870                         if (!unlocked)
 871                                 mtd_unlock(device);
 872                         mtd_write(imagefd, device, fis_layout, part_offset);
 873                         break;
 874                 case CMD_JFFS2WRITE:
 875                         if (!unlocked)
 876                                 mtd_unlock(device);
 877                         mtd_write_jffs2(device, imagefile, jffs2dir);
 878                         break;
 879                 case CMD_FIXTRX:
 880                     if (mtd_fixtrx) {
 881                             mtd_fixtrx(device, offset);
 882             }
 883                 case CMD_FIXSEAMA:
 884                         if (mtd_fixseama)
 885                             mtd_fixseama(device, 0);
 886                         break;
 887         }
 888
 889         sync();
 890
 891         if (boot)
 892                 do_reboot();
 893
 894         return 0;
 895 }