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