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@nbd.name>
   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 <byteswap.h>
  26 #include <endian.h>
  27 #include <limits.h>
  28 #include <unistd.h>
  29 #include <stdlib.h>
  30 #include <stdio.h>
  31 #include <stdint.h>
  32 #include <signal.h>
  33 #include <sys/ioctl.h>
  34 #include <sys/syscall.h>
  35 #include <fcntl.h>
  36 #include <errno.h>
  37 #include <time.h>
  38 #include <string.h>
  39 #include <sys/ioctl.h>
  40 #include <sys/types.h>
  41 #include <sys/param.h>
  42 #include <sys/mount.h>
  43 #include <sys/stat.h>
  44 #include <sys/reboot.h>
  45 #include <linux/reboot.h>
  46 #include <mtd/mtd-user.h>
  47 #include "fis.h"
  48 #include "mtd.h"
  49
  50 #include <libubox/md5.h>
  51
  52 #define MAX_ARGS 8
  53 #define JFFS2_DEFAULT_DIR       "" /* directory name without /, empty means root dir */
  54
  55 #define TRX_MAGIC               0x48445230      /* "HDR0" */
  56 #define SEAMA_MAGIC             0x5ea3a417
  57
  58 #if !defined(__BYTE_ORDER)
  59 #error "Unknown byte order"
  60 #endif
  61
  62 #if __BYTE_ORDER == __BIG_ENDIAN
  63 #define cpu_to_be32(x)  (x)
  64 #define be32_to_cpu(x)  (x)
  65 #elif __BYTE_ORDER == __LITTLE_ENDIAN
  66 #define cpu_to_be32(x)  bswap_32(x)
  67 #define be32_to_cpu(x)  bswap_32(x)
  68 #else
  69 #error "Unsupported endianness"
  70 #endif
  71
  72 enum mtd_image_format {
  73         MTD_IMAGE_FORMAT_UNKNOWN,
  74         MTD_IMAGE_FORMAT_TRX,
  75         MTD_IMAGE_FORMAT_SEAMA,
  76 };
  77
  78 static char *buf = NULL;
  79 static char *imagefile = NULL;
  80 static enum mtd_image_format imageformat = MTD_IMAGE_FORMAT_UNKNOWN;
  81 static char *jffs2file = NULL, *jffs2dir = JFFS2_DEFAULT_DIR;
  82 static int buflen = 0;
  83 int quiet;
  84 int no_erase;
  85 int mtdsize = 0;
  86 int erasesize = 0;
  87 int jffs2_skip_bytes=0;
  88 int mtdtype = 0;
  89
  90 int mtd_open(const char *mtd, bool block)
  91 {
  92         FILE *fp;
  93         char dev[PATH_MAX];
  94         int i;
  95         int ret;
  96         int flags = O_RDWR | O_SYNC;
  97         char name[PATH_MAX];
  98
  99         snprintf(name, sizeof(name), "\"%s\"", mtd);
 100         if ((fp = fopen("/proc/mtd", "r"))) {
 101                 while (fgets(dev, sizeof(dev), fp)) {
 102                         if (sscanf(dev, "mtd%d:", &i) && strstr(dev, name)) {
 103                                 snprintf(dev, sizeof(dev), "/dev/mtd%s/%d", (block ? "block" : ""), i);
 104                                 if ((ret=open(dev, flags))<0) {
 105                                         snprintf(dev, sizeof(dev), "/dev/mtd%s%d", (block ? "block" : ""), i);
 106                                         ret=open(dev, flags);
 107                                 }
 108                                 fclose(fp);
 109                                 return ret;
 110                         }
 111                 }
 112                 fclose(fp);
 113         }
 114
 115         return open(mtd, flags);
 116 }
 117
 118 int mtd_check_open(const char *mtd)
 119 {
 120         struct mtd_info_user mtdInfo;
 121         int fd;
 122
 123         fd = mtd_open(mtd, false);
 124         if(fd < 0) {
 125                 fprintf(stderr, "Could not open mtd device: %s\n", mtd);
 126                 return -1;
 127         }
 128
 129         if(ioctl(fd, MEMGETINFO, &mtdInfo)) {
 130                 fprintf(stderr, "Could not get MTD device info from %s\n", mtd);
 131                 close(fd);
 132                 return -1;
 133         }
 134         mtdsize = mtdInfo.size;
 135         erasesize = mtdInfo.erasesize;
 136         mtdtype = mtdInfo.type;
 137
 138         return fd;
 139 }
 140
 141 int mtd_block_is_bad(int fd, int offset)
 142 {
 143         int r = 0;
 144         loff_t o = offset;
 145
 146         if (mtdtype == MTD_NANDFLASH)
 147         {
 148                 r = ioctl(fd, MEMGETBADBLOCK, &o);
 149                 if (r < 0)
 150                 {
 151                         fprintf(stderr, "Failed to get erase block status\n");
 152                         exit(1);
 153                 }
 154         }
 155         return r;
 156 }
 157
 158 int mtd_erase_block(int fd, int offset)
 159 {
 160         struct erase_info_user mtdEraseInfo;
 161
 162         mtdEraseInfo.start = offset;
 163         mtdEraseInfo.length = erasesize;
 164         ioctl(fd, MEMUNLOCK, &mtdEraseInfo);
 165         if (ioctl (fd, MEMERASE, &mtdEraseInfo) < 0)
 166                 return -1;
 167
 168         return 0;
 169 }
 170
 171 int mtd_write_buffer(int fd, const char *buf, int offset, int length)
 172 {
 173         lseek(fd, offset, SEEK_SET);
 174         write(fd, buf, length);
 175         return 0;
 176 }
 177
 178 static int
 179 image_check(int imagefd, const char *mtd)
 180 {
 181         uint32_t magic;
 182         int ret = 1;
 183         int bufread;
 184
 185         while (buflen < sizeof(magic)) {
 186                 bufread = read(imagefd, buf + buflen, sizeof(magic) - buflen);
 187                 if (bufread < 1)
 188                         break;
 189
 190                 buflen += bufread;
 191         }
 192
 193         if (buflen < sizeof(magic)) {
 194                 fprintf(stdout, "Could not get image magic\n");
 195                 return 0;
 196         }
 197
 198         magic = ((uint32_t *)buf)[0];
 199
 200         if (be32_to_cpu(magic) == TRX_MAGIC)
 201                 imageformat = MTD_IMAGE_FORMAT_TRX;
 202         else if (be32_to_cpu(magic) == SEAMA_MAGIC)
 203                 imageformat = MTD_IMAGE_FORMAT_SEAMA;
 204
 205         switch (imageformat) {
 206         case MTD_IMAGE_FORMAT_TRX:
 207                 if (trx_check)
 208                         ret = trx_check(imagefd, mtd, buf, &buflen);
 209                 break;
 210         case MTD_IMAGE_FORMAT_SEAMA:
 211                 break;
 212         default:
 213 #ifdef target_brcm
 214                 if (!strcmp(mtd, "firmware"))
 215                         ret = 0;
 216 #endif
 217                 break;
 218         }
 219
 220         return ret;
 221 }
 222
 223 static int mtd_check(const char *mtd)
 224 {
 225         char *next = NULL;
 226         char *str = NULL;
 227         int fd;
 228
 229         if (strchr(mtd, ':')) {
 230                 str = strdup(mtd);
 231                 mtd = str;
 232         }
 233
 234         do {
 235                 next = strchr(mtd, ':');
 236                 if (next) {
 237                         *next = 0;
 238                         next++;
 239                 }
 240
 241                 fd = mtd_check_open(mtd);
 242                 if (fd < 0)
 243                         return 0;
 244
 245                 if (!buf)
 246                         buf = malloc(erasesize);
 247
 248                 close(fd);
 249                 mtd = next;
 250         } while (next);
 251
 252         if (str)
 253                 free(str);
 254
 255         return 1;
 256 }
 257
 258 static int
 259 mtd_unlock(const char *mtd)
 260 {
 261         struct erase_info_user mtdLockInfo;
 262         char *next = NULL;
 263         char *str = NULL;
 264         int fd;
 265
 266         if (strchr(mtd, ':')) {
 267                 str = strdup(mtd);
 268                 mtd = str;
 269         }
 270
 271         do {
 272                 next = strchr(mtd, ':');
 273                 if (next) {
 274                         *next = 0;
 275                         next++;
 276                 }
 277
 278                 fd = mtd_check_open(mtd);
 279                 if(fd < 0) {
 280                         fprintf(stderr, "Could not open mtd device: %s\n", mtd);
 281                         exit(1);
 282                 }
 283
 284                 if (quiet < 2)
 285                         fprintf(stderr, "Unlocking %s ...\n", mtd);
 286
 287                 mtdLockInfo.start = 0;
 288                 mtdLockInfo.length = mtdsize;
 289                 ioctl(fd, MEMUNLOCK, &mtdLockInfo);
 290                 close(fd);
 291                 mtd = next;
 292         } while (next);
 293
 294         if (str)
 295                 free(str);
 296
 297         return 0;
 298 }
 299
 300 static int
 301 mtd_erase(const char *mtd)
 302 {
 303         int fd;
 304         struct erase_info_user mtdEraseInfo;
 305
 306         if (quiet < 2)
 307                 fprintf(stderr, "Erasing %s ...\n", mtd);
 308
 309         fd = mtd_check_open(mtd);
 310         if(fd < 0) {
 311                 fprintf(stderr, "Could not open mtd device: %s\n", mtd);
 312                 exit(1);
 313         }
 314
 315         mtdEraseInfo.length = erasesize;
 316
 317         for (mtdEraseInfo.start = 0;
 318                  mtdEraseInfo.start < mtdsize;
 319                  mtdEraseInfo.start += erasesize) {
 320                 if (mtd_block_is_bad(fd, mtdEraseInfo.start)) {
 321                         if (!quiet)
 322                                 fprintf(stderr, "\nSkipping bad block at 0x%x   ", mtdEraseInfo.start);
 323                 } else {
 324                         ioctl(fd, MEMUNLOCK, &mtdEraseInfo);
 325                         if(ioctl(fd, MEMERASE, &mtdEraseInfo))
 326                                 fprintf(stderr, "Failed to erase block on %s at 0x%x\n", mtd, mtdEraseInfo.start);
 327                 }
 328         }
 329
 330         close(fd);
 331         return 0;
 332
 333 }
 334
 335 static int
 336 mtd_dump(const char *mtd, int part_offset, int size)
 337 {
 338         int ret = 0, offset = 0;
 339         int fd;
 340         char *buf;
 341
 342         if (quiet < 2)
 343                 fprintf(stderr, "Dumping %s ...\n", mtd);
 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         if (!size)
 352                 size = mtdsize;
 353
 354         if (part_offset)
 355                 lseek(fd, part_offset, SEEK_SET);
 356
 357         buf = malloc(erasesize);
 358         if (!buf)
 359                 return -1;
 360
 361         do {
 362                 int len = (size > erasesize) ? (erasesize) : (size);
 363                 int rlen = read(fd, buf, len);
 364
 365                 if (rlen < 0) {
 366                         if (errno == EINTR)
 367                                 continue;
 368                         ret = -1;
 369                         goto out;
 370                 }
 371                 if (!rlen || rlen != len)
 372                         break;
 373                 if (mtd_block_is_bad(fd, offset)) {
 374                         fprintf(stderr, "skipping bad block at 0x%08x\n", offset);
 375                 } else {
 376                         size -= rlen;
 377                         write(1, buf, rlen);
 378                 }
 379                 offset += rlen;
 380         } while (size > 0);
 381
 382 out:
 383         close(fd);
 384         return ret;
 385 }
 386
 387 static int
 388 mtd_verify(const char *mtd, char *file)
 389 {
 390         uint32_t f_md5[4], m_md5[4];
 391         struct stat s;
 392         md5_ctx_t ctx;
 393         int ret = 0;
 394         int fd;
 395
 396         if (quiet < 2)
 397                 fprintf(stderr, "Verifying %s against %s ...\n", mtd, file);
 398
 399         if (stat(file, &s) || md5sum(file, f_md5) < 0) {
 400                 fprintf(stderr, "Failed to hash %s\n", file);
 401                 return -1;
 402         }
 403
 404         fd = mtd_check_open(mtd);
 405         if(fd < 0) {
 406                 fprintf(stderr, "Could not open mtd device: %s\n", mtd);
 407                 return -1;
 408         }
 409
 410         md5_begin(&ctx);
 411         do {
 412                 char buf[256];
 413                 int len = (s.st_size > sizeof(buf)) ? (sizeof(buf)) : (s.st_size);
 414                 int rlen = read(fd, buf, len);
 415
 416                 if (rlen < 0) {
 417                         if (errno == EINTR)
 418                                 continue;
 419                         ret = -1;
 420                         goto out;
 421                 }
 422                 if (!rlen)
 423                         break;
 424                 md5_hash(buf, rlen, &ctx);
 425                 s.st_size -= rlen;
 426         } while (s.st_size > 0);
 427
 428         md5_end(m_md5, &ctx);
 429
 430         fprintf(stderr, "%08x%08x%08x%08x - %s\n", m_md5[0], m_md5[1], m_md5[2], m_md5[3], mtd);
 431         fprintf(stderr, "%08x%08x%08x%08x - %s\n", f_md5[0], f_md5[1], f_md5[2], f_md5[3], file);
 432
 433         ret = memcmp(f_md5, m_md5, sizeof(m_md5));
 434         if (!ret)
 435                 fprintf(stderr, "Success\n");
 436         else
 437                 fprintf(stderr, "Failed\n");
 438
 439 out:
 440         close(fd);
 441         return ret;
 442 }
 443
 444 static void
 445 indicate_writing(const char *mtd)
 446 {
 447         if (quiet < 2)
 448                 fprintf(stderr, "\nWriting from %s to %s ... ", imagefile, mtd);
 449
 450         if (!quiet)
 451                 fprintf(stderr, " [ ]");
 452 }
 453
 454 static int
 455 mtd_write(int imagefd, const char *mtd, char *fis_layout, size_t part_offset)
 456 {
 457         char *next = NULL;
 458         char *str = NULL;
 459         int fd, result;
 460         ssize_t r, w, e;
 461         ssize_t skip = 0;
 462         uint32_t offset = 0;
 463         int jffs2_replaced = 0;
 464         int skip_bad_blocks = 0;
 465
 466 #ifdef FIS_SUPPORT
 467         static struct fis_part new_parts[MAX_ARGS];
 468         static struct fis_part old_parts[MAX_ARGS];
 469         int n_new = 0, n_old = 0;
 470
 471         if (fis_layout) {
 472                 const char *tmp = mtd;
 473                 char *word, *brkt;
 474                 int ret;
 475
 476                 memset(&old_parts, 0, sizeof(old_parts));
 477                 memset(&new_parts, 0, sizeof(new_parts));
 478
 479                 do {
 480                         next = strchr(tmp, ':');
 481                         if (!next)
 482                                 next = (char *) tmp + strlen(tmp);
 483
 484                         memcpy(old_parts[n_old].name, tmp, next - tmp);
 485
 486                         n_old++;
 487                         tmp = next + 1;
 488                 } while(*next);
 489
 490                 for (word = strtok_r(fis_layout, ",", &brkt);
 491                      word;
 492                          word = strtok_r(NULL, ",", &brkt)) {
 493
 494                         tmp = strtok(word, ":");
 495                         strncpy((char *) new_parts[n_new].name, tmp, sizeof(new_parts[n_new].name) - 1);
 496
 497                         tmp = strtok(NULL, ":");
 498                         if (!tmp)
 499                                 goto next;
 500
 501                         new_parts[n_new].size = strtoul(tmp, NULL, 0);
 502
 503                         tmp = strtok(NULL, ":");
 504                         if (!tmp)
 505                                 goto next;
 506
 507                         new_parts[n_new].loadaddr = strtoul(tmp, NULL, 16);
 508 next:
 509                         n_new++;
 510                 }
 511                 ret = fis_validate(old_parts, n_old, new_parts, n_new);
 512                 if (ret < 0) {
 513                         fprintf(stderr, "Failed to validate the new FIS partition table\n");
 514                         exit(1);
 515                 }
 516                 if (ret == 0)
 517                         fis_layout = NULL;
 518         }
 519 #endif
 520
 521         if (strchr(mtd, ':')) {
 522                 str = strdup(mtd);
 523                 mtd = str;
 524         }
 525
 526         r = 0;
 527
 528 resume:
 529         next = strchr(mtd, ':');
 530         if (next) {
 531                 *next = 0;
 532                 next++;
 533         }
 534
 535         fd = mtd_check_open(mtd);
 536         if(fd < 0) {
 537                 fprintf(stderr, "Could not open mtd device: %s\n", mtd);
 538                 exit(1);
 539         }
 540         if (part_offset > 0) {
 541                 fprintf(stderr, "Seeking on mtd device '%s' to: %zu\n", mtd, part_offset);
 542                 lseek(fd, part_offset, SEEK_SET);
 543         }
 544
 545         indicate_writing(mtd);
 546
 547         w = e = 0;
 548         for (;;) {
 549                 /* buffer may contain data already (from trx check or last mtd partition write attempt) */
 550                 while (buflen < erasesize) {
 551                         r = read(imagefd, buf + buflen, erasesize - buflen);
 552                         if (r < 0) {
 553                                 if ((errno == EINTR) || (errno == EAGAIN))
 554                                         continue;
 555                                 else {
 556                                         perror("read");
 557                                         break;
 558                                 }
 559                         }
 560
 561                         if (r == 0)
 562                                 break;
 563
 564                         buflen += r;
 565                 }
 566
 567                 if (buflen == 0)
 568                         break;
 569
 570                 if (buflen < erasesize) {
 571                         /* Pad block to eraseblock size */
 572                         memset(&buf[buflen], 0xff, erasesize - buflen);
 573                         buflen = erasesize;
 574                 }
 575
 576                 if (skip > 0) {
 577                         skip -= buflen;
 578                         buflen = 0;
 579                         if (skip <= 0)
 580                                 indicate_writing(mtd);
 581
 582                         continue;
 583                 }
 584
 585                 if (jffs2file && w >= jffs2_skip_bytes) {
 586                         if (memcmp(buf, JFFS2_EOF, sizeof(JFFS2_EOF) - 1) == 0) {
 587                                 if (!quiet)
 588                                         fprintf(stderr, "\b\b\b   ");
 589                                 if (quiet < 2)
 590                                         fprintf(stderr, "\nAppending jffs2 data from %s to %s..\n.", jffs2file, mtd);
 591                                 /* got an EOF marker - this is the place to add some jffs2 data */
 592                                 skip = mtd_replace_jffs2(mtd, fd, e, jffs2file);
 593                                 jffs2_replaced = 1;
 594
 595                                 /* don't add it again */
 596                                 jffs2file = NULL;
 597
 598                                 w += skip;
 599                                 e += skip;
 600                                 skip -= buflen;
 601                                 buflen = 0;
 602                                 offset = 0;
 603                                 continue;
 604                         }
 605                         /* no EOF marker, make sure we figure out the last inode number
 606                          * before appending some data */
 607                         mtd_parse_jffs2data(buf, jffs2dir);
 608                 }
 609
 610                 /* need to erase the next block before writing data to it */
 611                 if(!no_erase)
 612                 {
 613                         while (w + buflen > e - skip_bad_blocks) {
 614                                 if (!quiet)
 615                                         fprintf(stderr, "\b\b\b[e]");
 616
 617                                 if (mtd_block_is_bad(fd, e)) {
 618                                         if (!quiet)
 619                                                 fprintf(stderr, "\nSkipping bad block at 0x%08zx   ", e);
 620
 621                                         skip_bad_blocks += erasesize;
 622                                         e += erasesize;
 623
 624                                         // Move the file pointer along over the bad block.
 625                                         lseek(fd, erasesize, SEEK_CUR);
 626                                         continue;
 627                                 }
 628
 629                                 if (mtd_erase_block(fd, e) < 0) {
 630                                         if (next) {
 631                                                 if (w < e) {
 632                                                         write(fd, buf + offset, e - w);
 633                                                         offset = e - w;
 634                                                 }
 635                                                 w = 0;
 636                                                 e = 0;
 637                                                 close(fd);
 638                                                 mtd = next;
 639                                                 fprintf(stderr, "\b\b\b   \n");
 640                                                 goto resume;
 641                                         } else {
 642                                                 fprintf(stderr, "Failed to erase block\n");
 643                                                 exit(1);
 644                                         }
 645                                 }
 646
 647                                 /* erase the chunk */
 648                                 e += erasesize;
 649                         }
 650                 }
 651
 652                 if (!quiet)
 653                         fprintf(stderr, "\b\b\b[w]");
 654
 655                 if ((result = write(fd, buf + offset, buflen)) < buflen) {
 656                         if (result < 0) {
 657                                 fprintf(stderr, "Error writing image.\n");
 658                                 exit(1);
 659                         } else {
 660                                 fprintf(stderr, "Insufficient space.\n");
 661                                 exit(1);
 662                         }
 663                 }
 664                 w += buflen;
 665
 666                 buflen = 0;
 667                 offset = 0;
 668         }
 669
 670         if (jffs2_replaced) {
 671                 switch (imageformat) {
 672                 case MTD_IMAGE_FORMAT_TRX:
 673                         if (trx_fixup)
 674                                 trx_fixup(fd, mtd);
 675                         break;
 676                 case MTD_IMAGE_FORMAT_SEAMA:
 677                         if (mtd_fixseama)
 678                                 mtd_fixseama(mtd, 0, 0);
 679                         break;
 680                 default:
 681                         break;
 682                 }
 683         }
 684
 685         if (!quiet)
 686                 fprintf(stderr, "\b\b\b\b    ");
 687
 688         if (quiet < 2)
 689                 fprintf(stderr, "\n");
 690
 691 #ifdef FIS_SUPPORT
 692         if (fis_layout) {
 693                 if (fis_remap(old_parts, n_old, new_parts, n_new) < 0)
 694                         fprintf(stderr, "Failed to update the FIS partition table\n");
 695         }
 696 #endif
 697
 698         close(fd);
 699         return 0;
 700 }
 701
 702 static void usage(void)
 703 {
 704         fprintf(stderr, "Usage: mtd [<options> ...] <command> [<arguments> ...] <device>[:<device>...]\n\n"
 705         "The device is in the format of mtdX (eg: mtd4) or its label.\n"
 706         "mtd recognizes these commands:\n"
 707         "        unlock                  unlock the device\n"
 708         "        refresh                 refresh mtd partition\n"
 709         "        erase                   erase all data on device\n"
 710         "        verify <imagefile>|-    verify <imagefile> (use - for stdin) to device\n"
 711         "        write <imagefile>|-     write <imagefile> (use - for stdin) to device\n"
 712         "        jffs2write <file>       append <file> to the jffs2 partition on the device\n");
 713         if (mtd_resetbc) {
 714             fprintf(stderr,
 715         "        resetbc <device>        reset the uboot boot counter\n");
 716         }
 717         if (mtd_fixtrx) {
 718             fprintf(stderr,
 719         "        fixtrx                  fix the checksum in a trx header on first boot\n");
 720         }
 721         if (mtd_fixseama) {
 722             fprintf(stderr,
 723         "        fixseama                fix the checksum in a seama header on first boot\n");
 724         }
 725         fprintf(stderr,
 726         "Following options are available:\n"
 727         "        -q                      quiet mode (once: no [w] on writing,\n"
 728         "                                           twice: no status messages)\n"
 729         "        -n                      write without first erasing the blocks\n"
 730         "        -r                      reboot after successful command\n"
 731         "        -f                      force write without trx checks\n"
 732         "        -e <device>             erase <device> before executing the command\n"
 733         "        -d <name>               directory for jffs2write, defaults to \"tmp\"\n"
 734         "        -j <name>               integrate <file> into jffs2 data when writing an image\n"
 735         "        -s <number>             skip the first n bytes when appending data to the jffs2 partiton, defaults to \"0\"\n"
 736         "        -p <number>             write beginning at partition offset\n"
 737         "        -l <length>             the length of data that we want to dump\n");
 738         if (mtd_fixtrx) {
 739             fprintf(stderr,
 740         "        -o offset               offset of the image header in the partition(for fixtrx)\n");
 741         }
 742         if (mtd_fixtrx || mtd_fixseama) {
 743                 fprintf(stderr,
 744         "        -c datasize             amount of data to be used for checksum calculation (for fixtrx / fixseama)\n");
 745         }
 746         fprintf(stderr,
 747 #ifdef FIS_SUPPORT
 748         "        -F <part>[:<size>[:<entrypoint>]][,<part>...]\n"
 749         "                                alter the fis partition table to create new partitions replacing\n"
 750         "                                the partitions provided as argument to the write command\n"
 751         "                                (only valid together with the write command)\n"
 752 #endif
 753         "\n"
 754         "Example: To write linux.trx to mtd4 labeled as linux and reboot afterwards\n"
 755         "         mtd -r write linux.trx linux\n\n");
 756         exit(1);
 757 }
 758
 759 static void do_reboot(void)
 760 {
 761         fprintf(stderr, "Rebooting ...\n");
 762         fflush(stderr);
 763
 764         /* try regular reboot method first */
 765         system("/sbin/reboot");
 766         sleep(2);
 767
 768         /* if we're still alive at this point, force the kernel to reboot */
 769         syscall(SYS_reboot,LINUX_REBOOT_MAGIC1,LINUX_REBOOT_MAGIC2,LINUX_REBOOT_CMD_RESTART,NULL);
 770 }
 771
 772 int main (int argc, char **argv)
 773 {
 774         int ch, i, boot, imagefd = 0, force, unlocked;
 775         char *erase[MAX_ARGS], *device = NULL;
 776         char *fis_layout = NULL;
 777         size_t offset = 0, data_size = 0, part_offset = 0, dump_len = 0;
 778         enum {
 779                 CMD_ERASE,
 780                 CMD_WRITE,
 781                 CMD_UNLOCK,
 782                 CMD_JFFS2WRITE,
 783                 CMD_FIXTRX,
 784                 CMD_FIXSEAMA,
 785                 CMD_VERIFY,
 786                 CMD_DUMP,
 787                 CMD_RESETBC,
 788         } cmd = -1;
 789
 790         erase[0] = NULL;
 791         boot = 0;
 792         force = 0;
 793         buflen = 0;
 794         quiet = 0;
 795         no_erase = 0;
 796
 797         while ((ch = getopt(argc, argv,
 798 #ifdef FIS_SUPPORT
 799                         "F:"
 800 #endif
 801                         "frnqe:d:s:j:p:o:c:l:")) != -1)
 802                 switch (ch) {
 803                         case 'f':
 804                                 force = 1;
 805                                 break;
 806                         case 'r':
 807                                 boot = 1;
 808                                 break;
 809                         case 'n':
 810                                 no_erase = 1;
 811                                 break;
 812                         case 'j':
 813                                 jffs2file = optarg;
 814                                 break;
 815                         case 's':
 816                                 errno = 0;
 817                                 jffs2_skip_bytes = strtoul(optarg, 0, 0);
 818                                 if (errno) {
 819                                                 fprintf(stderr, "-s: illegal numeric string\n");
 820                                                 usage();
 821                                 }
 822                                 break;
 823                         case 'q':
 824                                 quiet++;
 825                                 break;
 826                         case 'e':
 827                                 i = 0;
 828                                 while ((erase[i] != NULL) && ((i + 1) < MAX_ARGS))
 829                                         i++;
 830
 831                                 erase[i++] = optarg;
 832                                 erase[i] = NULL;
 833                                 break;
 834                         case 'd':
 835                                 jffs2dir = optarg;
 836                                 break;
 837                         case 'p':
 838                                 errno = 0;
 839                                 part_offset = strtoul(optarg, 0, 0);
 840                                 if (errno) {
 841                                         fprintf(stderr, "-p: illegal numeric string\n");
 842                                         usage();
 843                                 }
 844                                 break;
 845                         case 'l':
 846                                 errno = 0;
 847                                 dump_len = strtoul(optarg, 0, 0);
 848                                 if (errno) {
 849                                         fprintf(stderr, "-l: illegal numeric string\n");
 850                                         usage();
 851                                 }
 852                                 break;
 853                         case 'o':
 854                                 errno = 0;
 855                                 offset = strtoul(optarg, 0, 0);
 856                                 if (errno) {
 857                                         fprintf(stderr, "-o: illegal numeric string\n");
 858                                         usage();
 859                                 }
 860                                 break;
 861                         case 'c':
 862                                 errno = 0;
 863                                 data_size = strtoul(optarg, 0, 0);
 864                                 if (errno) {
 865                                         fprintf(stderr, "-c: illegal numeric string\n");
 866                                         usage();
 867                                 }
 868                                 break;
 869 #ifdef FIS_SUPPORT
 870                         case 'F':
 871                                 fis_layout = optarg;
 872                                 break;
 873 #endif
 874                         case '?':
 875                         default:
 876                                 usage();
 877                 }
 878         argc -= optind;
 879         argv += optind;
 880
 881         if (argc < 2)
 882                 usage();
 883
 884         if ((strcmp(argv[0], "unlock") == 0) && (argc == 2)) {
 885                 cmd = CMD_UNLOCK;
 886                 device = argv[1];
 887         } else if ((strcmp(argv[0], "erase") == 0) && (argc == 2)) {
 888                 cmd = CMD_ERASE;
 889                 device = argv[1];
 890         } else if (((strcmp(argv[0], "resetbc") == 0) && (argc == 2)) && mtd_resetbc) {
 891                 cmd = CMD_RESETBC;
 892                 device = argv[1];
 893         } else if (((strcmp(argv[0], "fixtrx") == 0) && (argc == 2)) && mtd_fixtrx) {
 894                 cmd = CMD_FIXTRX;
 895                 device = argv[1];
 896         } else if (((strcmp(argv[0], "fixseama") == 0) && (argc == 2)) && mtd_fixseama) {
 897                 cmd = CMD_FIXSEAMA;
 898                 device = argv[1];
 899         } else if ((strcmp(argv[0], "verify") == 0) && (argc == 3)) {
 900                 cmd = CMD_VERIFY;
 901                 imagefile = argv[1];
 902                 device = argv[2];
 903         } else if ((strcmp(argv[0], "dump") == 0) && (argc == 2)) {
 904                 cmd = CMD_DUMP;
 905                 device = argv[1];
 906         } else if ((strcmp(argv[0], "write") == 0) && (argc == 3)) {
 907                 cmd = CMD_WRITE;
 908                 device = argv[2];
 909
 910                 if (strcmp(argv[1], "-") == 0) {
 911                         imagefile = "<stdin>";
 912                         imagefd = 0;
 913                 } else {
 914                         imagefile = argv[1];
 915                         if ((imagefd = open(argv[1], O_RDONLY)) < 0) {
 916                                 fprintf(stderr, "Couldn't open image file: %s!\n", imagefile);
 917                                 exit(1);
 918                         }
 919                 }
 920
 921                 if (!mtd_check(device)) {
 922                         fprintf(stderr, "Can't open device for writing!\n");
 923                         exit(1);
 924                 }
 925                 /* check trx file before erasing or writing anything */
 926                 if (!image_check(imagefd, device) && !force) {
 927                         fprintf(stderr, "Image check failed.\n");
 928                         exit(1);
 929                 }
 930         } else if ((strcmp(argv[0], "jffs2write") == 0) && (argc == 3)) {
 931                 cmd = CMD_JFFS2WRITE;
 932                 device = argv[2];
 933
 934                 imagefile = argv[1];
 935                 if (!mtd_check(device)) {
 936                         fprintf(stderr, "Can't open device for writing!\n");
 937                         exit(1);
 938                 }
 939         } else {
 940                 usage();
 941         }
 942
 943         sync();
 944
 945         i = 0;
 946         unlocked = 0;
 947         while (erase[i] != NULL) {
 948                 mtd_unlock(erase[i]);
 949                 mtd_erase(erase[i]);
 950                 if (strcmp(erase[i], device) == 0)
 951                         unlocked = 1;
 952                 i++;
 953         }
 954
 955         switch (cmd) {
 956                 case CMD_UNLOCK:
 957                         if (!unlocked)
 958                                 mtd_unlock(device);
 959                         break;
 960                 case CMD_VERIFY:
 961                         mtd_verify(device, imagefile);
 962                         break;
 963                 case CMD_DUMP:
 964                         mtd_dump(device, offset, dump_len);
 965                         break;
 966                 case CMD_ERASE:
 967                         if (!unlocked)
 968                                 mtd_unlock(device);
 969                         mtd_erase(device);
 970                         break;
 971                 case CMD_WRITE:
 972                         if (!unlocked)
 973                                 mtd_unlock(device);
 974                         mtd_write(imagefd, device, fis_layout, part_offset);
 975                         break;
 976                 case CMD_JFFS2WRITE:
 977                         if (!unlocked)
 978                                 mtd_unlock(device);
 979                         mtd_write_jffs2(device, imagefile, jffs2dir);
 980                         break;
 981                 case CMD_FIXTRX:
 982                         if (mtd_fixtrx) {
 983                                 mtd_fixtrx(device, offset, data_size);
 984                         }
 985                         break;
 986                 case CMD_RESETBC:
 987                         if (mtd_resetbc) {
 988                                 mtd_resetbc(device);
 989                         }
 990                         break;
 991                 case CMD_FIXSEAMA:
 992                         if (mtd_fixseama)
 993                                 mtd_fixseama(device, 0, data_size);
 994                         break;
 995         }
 996
 997         sync();
 998
 999         if (boot)
1000                 do_reboot();
1001
1002         return 0;
1003 }