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 <limits.h>
  27 #include <unistd.h>
  28 #include <stdlib.h>
  29 #include <stdio.h>
  30 #include <stdint.h>
  31 #include <signal.h>
  32 #include <sys/ioctl.h>
  33 #include <sys/syscall.h>
  34 #include <fcntl.h>
  35 #include <errno.h>
  36 #include <time.h>
  37 #include <string.h>
  38 #include <sys/ioctl.h>
  39 #include <sys/types.h>
  40 #include <sys/param.h>
  41 #include <sys/mount.h>
  42 #include <sys/stat.h>
  43 #include <sys/reboot.h>
  44 #include <linux/reboot.h>
  45 #include <mtd/mtd-user.h>
  46 #include "fis.h"
  47 #include "mtd.h"
  48
  49 #include <libubox/md5.h>
  50
  51 #define MAX_ARGS 8
  52 #define JFFS2_DEFAULT_DIR       "" /* directory name without /, empty means root dir */
  53
  54 #define TRX_MAGIC               0x48445230      /* "HDR0" */
  55 #define SEAMA_MAGIC             0x5ea3a417
  56
  57 #if !defined(__BYTE_ORDER)
  58 #error "Unknown byte order"
  59 #endif
  60
  61 #if __BYTE_ORDER == __BIG_ENDIAN
  62 #define cpu_to_be32(x)  (x)
  63 #define be32_to_cpu(x)  (x)
  64 #elif __BYTE_ORDER == __LITTLE_ENDIAN
  65 #define cpu_to_be32(x)  bswap_32(x)
  66 #define be32_to_cpu(x)  bswap_32(x)
  67 #else
  68 #error "Unsupported endianness"
  69 #endif
  70
  71 enum mtd_image_format {
  72         MTD_IMAGE_FORMAT_UNKNOWN,
  73         MTD_IMAGE_FORMAT_TRX,
  74         MTD_IMAGE_FORMAT_SEAMA,
  75 };
  76
  77 static char *buf = NULL;
  78 static char *imagefile = NULL;
  79 static enum mtd_image_format imageformat = MTD_IMAGE_FORMAT_UNKNOWN;
  80 static char *jffs2file = NULL, *jffs2dir = JFFS2_DEFAULT_DIR;
  81 static int buflen = 0;
  82 int quiet;
  83 int no_erase;
  84 int mtdsize = 0;
  85 int erasesize = 0;
  86 int jffs2_skip_bytes=0;
  87 int mtdtype = 0;
  88
  89 int mtd_open(const char *mtd, bool block)
  90 {
  91         FILE *fp;
  92         char dev[PATH_MAX];
  93         int i;
  94         int ret;
  95         int flags = O_RDWR | O_SYNC;
  96         char name[PATH_MAX];
  97
  98         snprintf(name, sizeof(name), "\"%s\"", mtd);
  99         if ((fp = fopen("/proc/mtd", "r"))) {
 100                 while (fgets(dev, sizeof(dev), fp)) {
 101                         if (sscanf(dev, "mtd%d:", &i) && strstr(dev, name)) {
 102                                 snprintf(dev, sizeof(dev), "/dev/mtd%s/%d", (block ? "block" : ""), i);
 103                                 if ((ret=open(dev, flags))<0) {
 104                                         snprintf(dev, sizeof(dev), "/dev/mtd%s%d", (block ? "block" : ""), i);
 105                                         ret=open(dev, flags);
 106                                 }
 107                                 fclose(fp);
 108                                 return ret;
 109                         }
 110                 }
 111                 fclose(fp);
 112         }
 113
 114         return open(mtd, flags);
 115 }
 116
 117 int mtd_check_open(const char *mtd)
 118 {
 119         struct mtd_info_user mtdInfo;
 120         int fd;
 121
 122         fd = mtd_open(mtd, false);
 123         if(fd < 0) {
 124                 fprintf(stderr, "Could not open mtd device: %s\n", mtd);
 125                 return -1;
 126         }
 127
 128         if(ioctl(fd, MEMGETINFO, &mtdInfo)) {
 129                 fprintf(stderr, "Could not get MTD device info from %s\n", mtd);
 130                 close(fd);
 131                 return -1;
 132         }
 133         mtdsize = mtdInfo.size;
 134         erasesize = mtdInfo.erasesize;
 135         mtdtype = mtdInfo.type;
 136
 137         return fd;
 138 }
 139
 140 int mtd_block_is_bad(int fd, int offset)
 141 {
 142         int r = 0;
 143         loff_t o = offset;
 144
 145         if (mtdtype == MTD_NANDFLASH)
 146         {
 147                 r = ioctl(fd, MEMGETBADBLOCK, &o);
 148                 if (r < 0)
 149                 {
 150                         fprintf(stderr, "Failed to get erase block status\n");
 151                         exit(1);
 152                 }
 153         }
 154         return r;
 155 }
 156
 157 int mtd_erase_block(int fd, int offset)
 158 {
 159         struct erase_info_user mtdEraseInfo;
 160
 161         mtdEraseInfo.start = offset;
 162         mtdEraseInfo.length = erasesize;
 163         ioctl(fd, MEMUNLOCK, &mtdEraseInfo);
 164         if (ioctl (fd, MEMERASE, &mtdEraseInfo) < 0)
 165                 return -1;
 166
 167         return 0;
 168 }
 169
 170 int mtd_write_buffer(int fd, const char *buf, int offset, int length)
 171 {
 172         lseek(fd, offset, SEEK_SET);
 173         write(fd, buf, length);
 174         return 0;
 175 }
 176
 177 static int
 178 image_check(int imagefd, const char *mtd)
 179 {
 180         uint32_t magic;
 181         int ret = 1;
 182         int bufread;
 183
 184         while (buflen < sizeof(magic)) {
 185                 bufread = read(imagefd, buf + buflen, sizeof(magic) - buflen);
 186                 if (bufread < 1)
 187                         break;
 188
 189                 buflen += bufread;
 190         }
 191
 192         if (buflen < sizeof(magic)) {
 193                 fprintf(stdout, "Could not get image magic\n");
 194                 return 0;
 195         }
 196
 197         magic = ((uint32_t *)buf)[0];
 198
 199         if (be32_to_cpu(magic) == TRX_MAGIC)
 200                 imageformat = MTD_IMAGE_FORMAT_TRX;
 201         else if (be32_to_cpu(magic) == SEAMA_MAGIC)
 202                 imageformat = MTD_IMAGE_FORMAT_SEAMA;
 203
 204         switch (imageformat) {
 205         case MTD_IMAGE_FORMAT_TRX:
 206                 if (trx_check)
 207                         ret = trx_check(imagefd, mtd, buf, &buflen);
 208                 break;
 209         case MTD_IMAGE_FORMAT_SEAMA:
 210                 break;
 211         default:
 212 #ifdef target_brcm
 213                 if (!strcmp(mtd, "firmware"))
 214                         ret = 0;
 215 #endif
 216                 break;
 217         }
 218
 219         return ret;
 220 }
 221
 222 static int mtd_check(const char *mtd)
 223 {
 224         char *next = NULL;
 225         char *str = NULL;
 226         int fd;
 227
 228         if (strchr(mtd, ':')) {
 229                 str = strdup(mtd);
 230                 mtd = str;
 231         }
 232
 233         do {
 234                 next = strchr(mtd, ':');
 235                 if (next) {
 236                         *next = 0;
 237                         next++;
 238                 }
 239
 240                 fd = mtd_check_open(mtd);
 241                 if (fd < 0)
 242                         return 0;
 243
 244                 if (!buf)
 245                         buf = malloc(erasesize);
 246
 247                 close(fd);
 248                 mtd = next;
 249         } while (next);
 250
 251         if (str)
 252                 free(str);
 253
 254         return 1;
 255 }
 256
 257 static int
 258 mtd_unlock(const char *mtd)
 259 {
 260         struct erase_info_user mtdLockInfo;
 261         char *next = NULL;
 262         char *str = NULL;
 263         int fd;
 264
 265         if (strchr(mtd, ':')) {
 266                 str = strdup(mtd);
 267                 mtd = str;
 268         }
 269
 270         do {
 271                 next = strchr(mtd, ':');
 272                 if (next) {
 273                         *next = 0;
 274                         next++;
 275                 }
 276
 277                 fd = mtd_check_open(mtd);
 278                 if(fd < 0) {
 279                         fprintf(stderr, "Could not open mtd device: %s\n", mtd);
 280                         exit(1);
 281                 }
 282
 283                 if (quiet < 2)
 284                         fprintf(stderr, "Unlocking %s ...\n", mtd);
 285
 286                 mtdLockInfo.start = 0;
 287                 mtdLockInfo.length = mtdsize;
 288                 ioctl(fd, MEMUNLOCK, &mtdLockInfo);
 289                 close(fd);
 290                 mtd = next;
 291         } while (next);
 292
 293         if (str)
 294                 free(str);
 295
 296         return 0;
 297 }
 298
 299 static int
 300 mtd_erase(const char *mtd)
 301 {
 302         int fd;
 303         struct erase_info_user mtdEraseInfo;
 304
 305         if (quiet < 2)
 306                 fprintf(stderr, "Erasing %s ...\n", mtd);
 307
 308         fd = mtd_check_open(mtd);
 309         if(fd < 0) {
 310                 fprintf(stderr, "Could not open mtd device: %s\n", mtd);
 311                 exit(1);
 312         }
 313
 314         mtdEraseInfo.length = erasesize;
 315
 316         for (mtdEraseInfo.start = 0;
 317                  mtdEraseInfo.start < mtdsize;
 318                  mtdEraseInfo.start += erasesize) {
 319                 if (mtd_block_is_bad(fd, mtdEraseInfo.start)) {
 320                         if (!quiet)
 321                                 fprintf(stderr, "\nSkipping bad block at 0x%x   ", mtdEraseInfo.start);
 322                 } else {
 323                         ioctl(fd, MEMUNLOCK, &mtdEraseInfo);
 324                         if(ioctl(fd, MEMERASE, &mtdEraseInfo))
 325                                 fprintf(stderr, "Failed to erase block on %s at 0x%x\n", mtd, mtdEraseInfo.start);
 326                 }
 327         }
 328
 329         close(fd);
 330         return 0;
 331
 332 }
 333
 334 static int
 335 mtd_dump(const char *mtd, int part_offset, int size)
 336 {
 337         int ret = 0, offset = 0;
 338         int fd;
 339         char *buf;
 340
 341         if (quiet < 2)
 342                 fprintf(stderr, "Dumping %s ...\n", mtd);
 343
 344         fd = mtd_check_open(mtd);
 345         if(fd < 0) {
 346                 fprintf(stderr, "Could not open mtd device: %s\n", mtd);
 347                 return -1;
 348         }
 349
 350         if (!size)
 351                 size = mtdsize;
 352
 353         if (part_offset)
 354                 lseek(fd, part_offset, SEEK_SET);
 355
 356         buf = malloc(erasesize);
 357         if (!buf)
 358                 return -1;
 359
 360         do {
 361                 int len = (size > erasesize) ? (erasesize) : (size);
 362                 int rlen = read(fd, buf, len);
 363
 364                 if (rlen < 0) {
 365                         if (errno == EINTR)
 366                                 continue;
 367                         ret = -1;
 368                         goto out;
 369                 }
 370                 if (!rlen || rlen != len)
 371                         break;
 372                 if (mtd_block_is_bad(fd, offset)) {
 373                         fprintf(stderr, "skipping bad block at 0x%08x\n", offset);
 374                 } else {
 375                         size -= rlen;
 376                         write(1, buf, rlen);
 377                 }
 378                 offset += rlen;
 379         } while (size > 0);
 380
 381 out:
 382         close(fd);
 383         return ret;
 384 }
 385
 386 static int
 387 mtd_verify(const char *mtd, char *file)
 388 {
 389         uint32_t f_md5[4], m_md5[4];
 390         struct stat s;
 391         md5_ctx_t ctx;
 392         int ret = 0;
 393         int fd;
 394
 395         if (quiet < 2)
 396                 fprintf(stderr, "Verifying %s against %s ...\n", mtd, file);
 397
 398         if (stat(file, &s) || md5sum(file, f_md5) < 0) {
 399                 fprintf(stderr, "Failed to hash %s\n", file);
 400                 return -1;
 401         }
 402
 403         fd = mtd_check_open(mtd);
 404         if(fd < 0) {
 405                 fprintf(stderr, "Could not open mtd device: %s\n", mtd);
 406                 return -1;
 407         }
 408
 409         md5_begin(&ctx);
 410         do {
 411                 char buf[256];
 412                 int len = (s.st_size > sizeof(buf)) ? (sizeof(buf)) : (s.st_size);
 413                 int rlen = read(fd, buf, len);
 414
 415                 if (rlen < 0) {
 416                         if (errno == EINTR)
 417                                 continue;
 418                         ret = -1;
 419                         goto out;
 420                 }
 421                 if (!rlen)
 422                         break;
 423                 md5_hash(buf, rlen, &ctx);
 424                 s.st_size -= rlen;
 425         } while (s.st_size > 0);
 426
 427         md5_end(m_md5, &ctx);
 428
 429         fprintf(stderr, "%08x%08x%08x%08x - %s\n", m_md5[0], m_md5[1], m_md5[2], m_md5[3], mtd);
 430         fprintf(stderr, "%08x%08x%08x%08x - %s\n", f_md5[0], f_md5[1], f_md5[2], f_md5[3], file);
 431
 432         ret = memcmp(f_md5, m_md5, sizeof(m_md5));
 433         if (!ret)
 434                 fprintf(stderr, "Success\n");
 435         else
 436                 fprintf(stderr, "Failed\n");
 437
 438 out:
 439         close(fd);
 440         return ret;
 441 }
 442
 443 static void
 444 indicate_writing(const char *mtd)
 445 {
 446         if (quiet < 2)
 447                 fprintf(stderr, "\nWriting from %s to %s ... ", imagefile, mtd);
 448
 449         if (!quiet)
 450                 fprintf(stderr, " [ ]");
 451 }
 452
 453 static int
 454 mtd_write(int imagefd, const char *mtd, char *fis_layout, size_t part_offset)
 455 {
 456         char *next = NULL;
 457         char *str = NULL;
 458         int fd, result;
 459         ssize_t r, w, e;
 460         ssize_t skip = 0;
 461         uint32_t offset = 0;
 462         int jffs2_replaced = 0;
 463         int skip_bad_blocks = 0;
 464
 465 #ifdef FIS_SUPPORT
 466         static struct fis_part new_parts[MAX_ARGS];
 467         static struct fis_part old_parts[MAX_ARGS];
 468         int n_new = 0, n_old = 0;
 469
 470         if (fis_layout) {
 471                 const char *tmp = mtd;
 472                 char *word, *brkt;
 473                 int ret;
 474
 475                 memset(&old_parts, 0, sizeof(old_parts));
 476                 memset(&new_parts, 0, sizeof(new_parts));
 477
 478                 do {
 479                         next = strchr(tmp, ':');
 480                         if (!next)
 481                                 next = (char *) tmp + strlen(tmp);
 482
 483                         memcpy(old_parts[n_old].name, tmp, next - tmp);
 484
 485                         n_old++;
 486                         tmp = next + 1;
 487                 } while(*next);
 488
 489                 for (word = strtok_r(fis_layout, ",", &brkt);
 490                      word;
 491                          word = strtok_r(NULL, ",", &brkt)) {
 492
 493                         tmp = strtok(word, ":");
 494                         strncpy((char *) new_parts[n_new].name, tmp, sizeof(new_parts[n_new].name) - 1);
 495
 496                         tmp = strtok(NULL, ":");
 497                         if (!tmp)
 498                                 goto next;
 499
 500                         new_parts[n_new].size = strtoul(tmp, NULL, 0);
 501
 502                         tmp = strtok(NULL, ":");
 503                         if (!tmp)
 504                                 goto next;
 505
 506                         new_parts[n_new].loadaddr = strtoul(tmp, NULL, 16);
 507 next:
 508                         n_new++;
 509                 }
 510                 ret = fis_validate(old_parts, n_old, new_parts, n_new);
 511                 if (ret < 0) {
 512                         fprintf(stderr, "Failed to validate the new FIS partition table\n");
 513                         exit(1);
 514                 }
 515                 if (ret == 0)
 516                         fis_layout = NULL;
 517         }
 518 #endif
 519
 520         if (strchr(mtd, ':')) {
 521                 str = strdup(mtd);
 522                 mtd = str;
 523         }
 524
 525         r = 0;
 526
 527 resume:
 528         next = strchr(mtd, ':');
 529         if (next) {
 530                 *next = 0;
 531                 next++;
 532         }
 533
 534         fd = mtd_check_open(mtd);
 535         if(fd < 0) {
 536                 fprintf(stderr, "Could not open mtd device: %s\n", mtd);
 537                 exit(1);
 538         }
 539         if (part_offset > 0) {
 540                 fprintf(stderr, "Seeking on mtd device '%s' to: %zu\n", mtd, part_offset);
 541                 lseek(fd, part_offset, SEEK_SET);
 542         }
 543
 544         indicate_writing(mtd);
 545
 546         w = e = 0;
 547         for (;;) {
 548                 /* buffer may contain data already (from trx check or last mtd partition write attempt) */
 549                 while (buflen < erasesize) {
 550                         r = read(imagefd, buf + buflen, erasesize - buflen);
 551                         if (r < 0) {
 552                                 if ((errno == EINTR) || (errno == EAGAIN))
 553                                         continue;
 554                                 else {
 555                                         perror("read");
 556                                         break;
 557                                 }
 558                         }
 559
 560                         if (r == 0)
 561                                 break;
 562
 563                         buflen += r;
 564                 }
 565
 566                 if (buflen == 0)
 567                         break;
 568
 569                 if (buflen < erasesize) {
 570                         /* Pad block to eraseblock size */
 571                         memset(&buf[buflen], 0xff, erasesize - buflen);
 572                         buflen = erasesize;
 573                 }
 574
 575                 if (skip > 0) {
 576                         skip -= buflen;
 577                         buflen = 0;
 578                         if (skip <= 0)
 579                                 indicate_writing(mtd);
 580
 581                         continue;
 582                 }
 583
 584                 if (jffs2file && w >= jffs2_skip_bytes) {
 585                         if (memcmp(buf, JFFS2_EOF, sizeof(JFFS2_EOF) - 1) == 0) {
 586                                 if (!quiet)
 587                                         fprintf(stderr, "\b\b\b   ");
 588                                 if (quiet < 2)
 589                                         fprintf(stderr, "\nAppending jffs2 data from %s to %s...", jffs2file, mtd);
 590                                 /* got an EOF marker - this is the place to add some jffs2 data */
 591                                 skip = mtd_replace_jffs2(mtd, fd, e, jffs2file);
 592                                 jffs2_replaced = 1;
 593
 594                                 /* don't add it again */
 595                                 jffs2file = NULL;
 596
 597                                 w += skip;
 598                                 e += skip;
 599                                 skip -= buflen;
 600                                 buflen = 0;
 601                                 offset = 0;
 602                                 continue;
 603                         }
 604                         /* no EOF marker, make sure we figure out the last inode number
 605                          * before appending some data */
 606                         mtd_parse_jffs2data(buf, jffs2dir);
 607                 }
 608
 609                 /* need to erase the next block before writing data to it */
 610                 if(!no_erase)
 611                 {
 612                         while (w + buflen > e - skip_bad_blocks) {
 613                                 if (!quiet)
 614                                         fprintf(stderr, "\b\b\b[e]");
 615
 616                                 if (mtd_block_is_bad(fd, e)) {
 617                                         if (!quiet)
 618                                                 fprintf(stderr, "\nSkipping bad block at 0x%08zx   ", e);
 619
 620                                         skip_bad_blocks += erasesize;
 621                                         e += erasesize;
 622
 623                                         // Move the file pointer along over the bad block.
 624                                         lseek(fd, erasesize, SEEK_CUR);
 625                                         continue;
 626                                 }
 627
 628                                 if (mtd_erase_block(fd, e) < 0) {
 629                                         if (next) {
 630                                                 if (w < e) {
 631                                                         write(fd, buf + offset, e - w);
 632                                                         offset = e - w;
 633                                                 }
 634                                                 w = 0;
 635                                                 e = 0;
 636                                                 close(fd);
 637                                                 mtd = next;
 638                                                 fprintf(stderr, "\b\b\b   \n");
 639                                                 goto resume;
 640                                         } else {
 641                                                 fprintf(stderr, "Failed to erase block\n");
 642                                                 exit(1);
 643                                         }
 644                                 }
 645
 646                                 /* erase the chunk */
 647                                 e += erasesize;
 648                         }
 649                 }
 650
 651                 if (!quiet)
 652                         fprintf(stderr, "\b\b\b[w]");
 653
 654                 if ((result = write(fd, buf + offset, buflen)) < buflen) {
 655                         if (result < 0) {
 656                                 fprintf(stderr, "Error writing image.\n");
 657                                 exit(1);
 658                         } else {
 659                                 fprintf(stderr, "Insufficient space.\n");
 660                                 exit(1);
 661                         }
 662                 }
 663                 w += buflen;
 664
 665                 buflen = 0;
 666                 offset = 0;
 667         }
 668
 669         if (jffs2_replaced) {
 670                 switch (imageformat) {
 671                 case MTD_IMAGE_FORMAT_TRX:
 672                         if (trx_fixup)
 673                                 trx_fixup(fd, mtd);
 674                         break;
 675                 case MTD_IMAGE_FORMAT_SEAMA:
 676                         if (mtd_fixseama)
 677                                 mtd_fixseama(mtd, 0, 0);
 678                         break;
 679                 default:
 680                         break;
 681                 }
 682         }
 683
 684         if (!quiet)
 685                 fprintf(stderr, "\b\b\b\b    ");
 686
 687         if (quiet < 2)
 688                 fprintf(stderr, "\n");
 689
 690 #ifdef FIS_SUPPORT
 691         if (fis_layout) {
 692                 if (fis_remap(old_parts, n_old, new_parts, n_new) < 0)
 693                         fprintf(stderr, "Failed to update the FIS partition table\n");
 694         }
 695 #endif
 696
 697         close(fd);
 698         return 0;
 699 }
 700
 701 static void usage(void)
 702 {
 703         fprintf(stderr, "Usage: mtd [<options> ...] <command> [<arguments> ...] <device>[:<device>...]\n\n"
 704         "The device is in the format of mtdX (eg: mtd4) or its label.\n"
 705         "mtd recognizes these commands:\n"
 706         "        unlock                  unlock the device\n"
 707         "        refresh                 refresh mtd partition\n"
 708         "        erase                   erase all data on device\n"
 709         "        verify <imagefile>|-    verify <imagefile> (use - for stdin) to device\n"
 710         "        write <imagefile>|-     write <imagefile> (use - for stdin) to device\n"
 711         "        jffs2write <file>       append <file> to the jffs2 partition on the device\n");
 712         if (mtd_resetbc) {
 713             fprintf(stderr,
 714         "        resetbc <device>        reset the uboot boot counter\n");
 715         }
 716         if (mtd_fixtrx) {
 717             fprintf(stderr,
 718         "        fixtrx                  fix the checksum in a trx header on first boot\n");
 719         }
 720         if (mtd_fixseama) {
 721             fprintf(stderr,
 722         "        fixseama                fix the checksum in a seama header on first boot\n");
 723         }
 724         fprintf(stderr,
 725         "Following options are available:\n"
 726         "        -q                      quiet mode (once: no [w] on writing,\n"
 727         "                                           twice: no status messages)\n"
 728         "        -n                      write without first erasing the blocks\n"
 729         "        -r                      reboot after successful command\n"
 730         "        -f                      force write without trx checks\n"
 731         "        -e <device>             erase <device> before executing the command\n"
 732         "        -d <name>               directory for jffs2write, defaults to \"tmp\"\n"
 733         "        -j <name>               integrate <file> into jffs2 data when writing an image\n"
 734         "        -s <number>             skip the first n bytes when appending data to the jffs2 partiton, defaults to \"0\"\n"
 735         "        -p                      write beginning at partition offset\n"
 736         "        -l <length>             the length of data that we want to dump\n");
 737         if (mtd_fixtrx) {
 738             fprintf(stderr,
 739         "        -o offset               offset of the image header in the partition(for fixtrx)\n");
 740         }
 741         if (mtd_fixtrx || mtd_fixseama) {
 742                 fprintf(stderr,
 743         "        -c datasize             amount of data to be used for checksum calculation (for fixtrx / fixseama)\n");
 744         }
 745         fprintf(stderr,
 746 #ifdef FIS_SUPPORT
 747         "        -F <part>[:<size>[:<entrypoint>]][,<part>...]\n"
 748         "                                alter the fis partition table to create new partitions replacing\n"
 749         "                                the partitions provided as argument to the write command\n"
 750         "                                (only valid together with the write command)\n"
 751 #endif
 752         "\n"
 753         "Example: To write linux.trx to mtd4 labeled as linux and reboot afterwards\n"
 754         "         mtd -r write linux.trx linux\n\n");
 755         exit(1);
 756 }
 757
 758 static void do_reboot(void)
 759 {
 760         fprintf(stderr, "Rebooting ...\n");
 761         fflush(stderr);
 762
 763         /* try regular reboot method first */
 764         system("/sbin/reboot");
 765         sleep(2);
 766
 767         /* if we're still alive at this point, force the kernel to reboot */
 768         syscall(SYS_reboot,LINUX_REBOOT_MAGIC1,LINUX_REBOOT_MAGIC2,LINUX_REBOOT_CMD_RESTART,NULL);
 769 }
 770
 771 int main (int argc, char **argv)
 772 {
 773         int ch, i, boot, imagefd = 0, force, unlocked;
 774         char *erase[MAX_ARGS], *device = NULL;
 775         char *fis_layout = NULL;
 776         size_t offset = 0, data_size = 0, part_offset = 0, dump_len = 0;
 777         enum {
 778                 CMD_ERASE,
 779                 CMD_WRITE,
 780                 CMD_UNLOCK,
 781                 CMD_JFFS2WRITE,
 782                 CMD_FIXTRX,
 783                 CMD_FIXSEAMA,
 784                 CMD_VERIFY,
 785                 CMD_DUMP,
 786                 CMD_RESETBC,
 787         } cmd = -1;
 788
 789         erase[0] = NULL;
 790         boot = 0;
 791         force = 0;
 792         buflen = 0;
 793         quiet = 0;
 794         no_erase = 0;
 795
 796         while ((ch = getopt(argc, argv,
 797 #ifdef FIS_SUPPORT
 798                         "F:"
 799 #endif
 800                         "frnqe:d:s:j:p:o:c:l:")) != -1)
 801                 switch (ch) {
 802                         case 'f':
 803                                 force = 1;
 804                                 break;
 805                         case 'r':
 806                                 boot = 1;
 807                                 break;
 808                         case 'n':
 809                                 no_erase = 1;
 810                                 break;
 811                         case 'j':
 812                                 jffs2file = optarg;
 813                                 break;
 814                         case 's':
 815                                 errno = 0;
 816                                 jffs2_skip_bytes = strtoul(optarg, 0, 0);
 817                                 if (errno) {
 818                                                 fprintf(stderr, "-s: illegal numeric string\n");
 819                                                 usage();
 820                                 }
 821                                 break;
 822                         case 'q':
 823                                 quiet++;
 824                                 break;
 825                         case 'e':
 826                                 i = 0;
 827                                 while ((erase[i] != NULL) && ((i + 1) < MAX_ARGS))
 828                                         i++;
 829
 830                                 erase[i++] = optarg;
 831                                 erase[i] = NULL;
 832                                 break;
 833                         case 'd':
 834                                 jffs2dir = optarg;
 835                                 break;
 836                         case 'p':
 837                                 errno = 0;
 838                                 part_offset = strtoul(optarg, 0, 0);
 839                                 if (errno) {
 840                                         fprintf(stderr, "-p: illegal numeric string\n");
 841                                         usage();
 842                                 }
 843                                 break;
 844                         case 'l':
 845                                 errno = 0;
 846                                 dump_len = strtoul(optarg, 0, 0);
 847                                 if (errno) {
 848                                         fprintf(stderr, "-l: illegal numeric string\n");
 849                                         usage();
 850                                 }
 851                                 break;
 852                         case 'o':
 853                                 errno = 0;
 854                                 offset = strtoul(optarg, 0, 0);
 855                                 if (errno) {
 856                                         fprintf(stderr, "-o: illegal numeric string\n");
 857                                         usage();
 858                                 }
 859                                 break;
 860                         case 'c':
 861                                 errno = 0;
 862                                 data_size = strtoul(optarg, 0, 0);
 863                                 if (errno) {
 864                                         fprintf(stderr, "-c: illegal numeric string\n");
 865                                         usage();
 866                                 }
 867                                 break;
 868 #ifdef FIS_SUPPORT
 869                         case 'F':
 870                                 fis_layout = optarg;
 871                                 break;
 872 #endif
 873                         case '?':
 874                         default:
 875                                 usage();
 876                 }
 877         argc -= optind;
 878         argv += optind;
 879
 880         if (argc < 2)
 881                 usage();
 882
 883         if ((strcmp(argv[0], "unlock") == 0) && (argc == 2)) {
 884                 cmd = CMD_UNLOCK;
 885                 device = argv[1];
 886         } else if ((strcmp(argv[0], "erase") == 0) && (argc == 2)) {
 887                 cmd = CMD_ERASE;
 888                 device = argv[1];
 889         } else if (((strcmp(argv[0], "resetbc") == 0) && (argc == 2)) && mtd_resetbc) {
 890                 cmd = CMD_RESETBC;
 891                 device = argv[1];
 892         } else if (((strcmp(argv[0], "fixtrx") == 0) && (argc == 2)) && mtd_fixtrx) {
 893                 cmd = CMD_FIXTRX;
 894                 device = argv[1];
 895         } else if (((strcmp(argv[0], "fixseama") == 0) && (argc == 2)) && mtd_fixseama) {
 896                 cmd = CMD_FIXSEAMA;
 897                 device = argv[1];
 898         } else if ((strcmp(argv[0], "verify") == 0) && (argc == 3)) {
 899                 cmd = CMD_VERIFY;
 900                 imagefile = argv[1];
 901                 device = argv[2];
 902         } else if ((strcmp(argv[0], "dump") == 0) && (argc == 2)) {
 903                 cmd = CMD_DUMP;
 904                 device = argv[1];
 905         } else if ((strcmp(argv[0], "write") == 0) && (argc == 3)) {
 906                 cmd = CMD_WRITE;
 907                 device = argv[2];
 908
 909                 if (strcmp(argv[1], "-") == 0) {
 910                         imagefile = "<stdin>";
 911                         imagefd = 0;
 912                 } else {
 913                         imagefile = argv[1];
 914                         if ((imagefd = open(argv[1], O_RDONLY)) < 0) {
 915                                 fprintf(stderr, "Couldn't open image file: %s!\n", imagefile);
 916                                 exit(1);
 917                         }
 918                 }
 919
 920                 if (!mtd_check(device)) {
 921                         fprintf(stderr, "Can't open device for writing!\n");
 922                         exit(1);
 923                 }
 924                 /* check trx file before erasing or writing anything */
 925                 if (!image_check(imagefd, device) && !force) {
 926                         fprintf(stderr, "Image check failed.\n");
 927                         exit(1);
 928                 }
 929         } else if ((strcmp(argv[0], "jffs2write") == 0) && (argc == 3)) {
 930                 cmd = CMD_JFFS2WRITE;
 931                 device = argv[2];
 932
 933                 imagefile = argv[1];
 934                 if (!mtd_check(device)) {
 935                         fprintf(stderr, "Can't open device for writing!\n");
 936                         exit(1);
 937                 }
 938         } else {
 939                 usage();
 940         }
 941
 942         sync();
 943
 944         i = 0;
 945         unlocked = 0;
 946         while (erase[i] != NULL) {
 947                 mtd_unlock(erase[i]);
 948                 mtd_erase(erase[i]);
 949                 if (strcmp(erase[i], device) == 0)
 950                         unlocked = 1;
 951                 i++;
 952         }
 953
 954         switch (cmd) {
 955                 case CMD_UNLOCK:
 956                         if (!unlocked)
 957                                 mtd_unlock(device);
 958                         break;
 959                 case CMD_VERIFY:
 960                         mtd_verify(device, imagefile);
 961                         break;
 962                 case CMD_DUMP:
 963                         mtd_dump(device, offset, dump_len);
 964                         break;
 965                 case CMD_ERASE:
 966                         if (!unlocked)
 967                                 mtd_unlock(device);
 968                         mtd_erase(device);
 969                         break;
 970                 case CMD_WRITE:
 971                         if (!unlocked)
 972                                 mtd_unlock(device);
 973                         mtd_write(imagefd, device, fis_layout, part_offset);
 974                         break;
 975                 case CMD_JFFS2WRITE:
 976                         if (!unlocked)
 977                                 mtd_unlock(device);
 978                         mtd_write_jffs2(device, imagefile, jffs2dir);
 979                         break;
 980                 case CMD_FIXTRX:
 981                         if (mtd_fixtrx) {
 982                                 mtd_fixtrx(device, offset, data_size);
 983                         }
 984                         break;
 985                 case CMD_RESETBC:
 986                         if (mtd_resetbc) {
 987                                 mtd_resetbc(device);
 988                         }
 989                         break;
 990                 case CMD_FIXSEAMA:
 991                         if (mtd_fixseama)
 992                                 mtd_fixseama(device, 0, data_size);
 993                         break;
 994         }
 995
 996         sync();
 997
 998         if (boot)
 999                 do_reboot();
1000
1001         return 0;
1002 }