mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
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09af1cccb8
git-svn-id: svn://svn.openwrt.org/openwrt/trunk/openwrt@1809 3c298f89-4303-0410-b956-a3cf2f4a3e73
378 lines
8.1 KiB
C
378 lines
8.1 KiB
C
/*
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* mtd - simple memory technology device manipulation tool
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*
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* Copyright (C) 2005 Waldemar Brodkorb <wbx@dass-it.de>,
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* Felix Fietkau <nbd@vd-s.ath.cx>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* $Id$
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*
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* code is based on linux-mtd example code
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*/
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#include <limits.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <stdint.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <error.h>
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#include <time.h>
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#include <sys/ioctl.h>
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/mount.h>
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#include <sys/stat.h>
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#include <sys/reboot.h>
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#include <string.h>
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#include <linux/mtd/mtd.h>
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#define TRX_MAGIC 0x30524448 /* "HDR0" */
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#define BUFSIZE (10 * 1024)
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#define MAX_ARGS 8
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struct trx_header {
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uint32_t magic; /* "HDR0" */
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uint32_t len; /* Length of file including header */
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uint32_t crc32; /* 32-bit CRC from flag_version to end of file */
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uint32_t flag_version; /* 0:15 flags, 16:31 version */
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uint32_t offsets[3]; /* Offsets of partitions from start of header */
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};
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int
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trx_check(const char *trxfile, const char *mtd, int force)
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{
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struct mtd_info_user mtdInfo;
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int trxfd, fd;
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size_t count;
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struct trx_header trx;
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struct stat trxstat;
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trxfd = open(trxfile,O_RDONLY);
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if(trxfd < 0) {
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fprintf(stderr, "Could not open image: %s\n", trxfile);
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exit(1);
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}
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if (fstat(trxfd,&trxstat) < 0) {
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fprintf(stderr, "Could not get image file status: %s\n", trxfile);
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close(trxfd);
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exit(1);
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}
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if (force == 0) {
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count = read(trxfd, &trx, sizeof(struct trx_header));
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if (count < sizeof(struct trx_header)) {
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fprintf(stderr, "Could not get trx header, file too small (%ld bytes)\n", count);
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close(trxfd);
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exit(1);
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}
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if (trx.magic != TRX_MAGIC || trx.len < sizeof(struct trx_header)) {
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fprintf(stderr, "Bad trx header\n");
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fprintf(stderr, "If this is a firmware in bin format, like some of the\n"
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"original firmware files are, use following command to convert to trx:\n"
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"dd if=firmware.bin of=firmware.trx bs=32 skip=1\n");
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close(trxfd);
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exit(1);
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}
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lseek(trxfd, 0, SEEK_SET);
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}
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/* check if image fits to mtd device */
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fd = mtd_open(mtd, O_RDWR);
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if(fd < 0) {
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fprintf(stderr, "Could not open mtd device: %s\n", mtd);
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exit(1);
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}
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if(ioctl(fd, MEMGETINFO, &mtdInfo)) {
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fprintf(stderr, "Could not get MTD device info from %s\n", mtd);
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close(fd);
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exit(1);
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}
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if(mtdInfo.size < trxstat.st_size) {
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fprintf(stderr, "Image too big for partition: %s\n", mtd);
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close(trxfd);
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close(fd);
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exit(1);
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}
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printf("Writing %s to %s ...\n", trxfile, mtd);
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close(fd);
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return(trxfd);
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}
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int
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mtd_unlock(const char *mtd)
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{
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int fd;
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struct mtd_info_user mtdInfo;
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struct erase_info_user mtdLockInfo;
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fd = mtd_open(mtd, O_RDWR);
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if(fd < 0) {
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fprintf(stderr, "Could not open mtd device: %s\n", mtd);
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exit(1);
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}
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if(ioctl(fd, MEMGETINFO, &mtdInfo)) {
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fprintf(stderr, "Could not get MTD device info from %s\n", mtd);
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close(fd);
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exit(1);
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}
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printf("Unlocking %s ...\n", mtd);
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mtdLockInfo.start = 0;
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mtdLockInfo.length = mtdInfo.size;
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if(ioctl(fd, MEMUNLOCK, &mtdLockInfo)) {
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close(fd);
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return 0;
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}
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close(fd);
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return 0;
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}
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int
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mtd_open(const char *mtd, int flags)
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{
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FILE *fp;
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char dev[PATH_MAX];
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int i;
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if ((fp = fopen("/proc/mtd", "r"))) {
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while (fgets(dev, sizeof(dev), fp)) {
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if (sscanf(dev, "mtd%d:", &i) && strstr(dev, mtd)) {
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snprintf(dev, sizeof(dev), "/dev/mtd/%d", i);
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fclose(fp);
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return open(dev, flags);
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}
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}
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fclose(fp);
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}
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return open(mtd, flags);
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}
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int
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mtd_erase(const char *mtd)
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{
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int fd;
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struct mtd_info_user mtdInfo;
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struct erase_info_user mtdEraseInfo;
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fd = mtd_open(mtd, O_RDWR);
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if(fd < 0) {
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fprintf(stderr, "Could not open mtd device: %s\n", mtd);
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exit(1);
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}
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if(ioctl(fd, MEMGETINFO, &mtdInfo)) {
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fprintf(stderr, "Could not get MTD device info from %s\n", mtd);
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close(fd);
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exit(1);
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}
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printf("Erasing %s ...\n", mtd);
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mtdEraseInfo.length = mtdInfo.erasesize;
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for (mtdEraseInfo.start = 0;
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mtdEraseInfo.start < mtdInfo.size;
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mtdEraseInfo.start += mtdInfo.erasesize) {
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ioctl(fd, MEMUNLOCK, &mtdEraseInfo);
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if(ioctl(fd, MEMERASE, &mtdEraseInfo)) {
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fprintf(stderr, "Could not erase MTD device: %s\n", mtd);
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close(fd);
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exit(1);
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}
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}
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close(fd);
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return 0;
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}
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int
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mtd_write(int trxfd, const char *mtd)
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{
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int fd,i;
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size_t result,size,written;
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struct mtd_info_user mtdInfo;
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struct erase_info_user mtdEraseInfo;
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unsigned char src[BUFSIZE],dest[BUFSIZE];
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struct stat trxstat;
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if (fstat(trxfd,&trxstat) < 0) {
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fprintf(stderr, "Could not get trx image file status\n");
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close(trxfd);
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exit(1);
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}
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fd = mtd_open(mtd, O_RDWR);
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if(fd < 0) {
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fprintf(stderr, "Could not open mtd device: %s\n", mtd);
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exit(1);
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}
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if(ioctl(fd, MEMGETINFO, &mtdInfo)) {
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fprintf(stderr, "Could not get MTD device info from %s\n", mtd);
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close(fd);
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exit(1);
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}
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mtdEraseInfo.start = 0;
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mtdEraseInfo.length = trxstat.st_size & ~(mtdInfo.erasesize -1);
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if(trxstat.st_size % mtdInfo.erasesize) mtdEraseInfo.length += mtdInfo.erasesize;
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/* erase the chunk */
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if (ioctl (fd,MEMERASE,&mtdEraseInfo) < 0) {
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fprintf(stderr, "Erasing mtd failed: %s\n", mtd);
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exit(1);
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}
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size = trxstat.st_size;
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i = BUFSIZE;
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written = 0;
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while (size) {
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if (size < BUFSIZE) i = size;
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read(trxfd,src,i);
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result = write(fd,src,i);
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if (i != result) {
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if (result < 0) {
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fprintf(stderr,"Error while writing image");
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exit(1);
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}
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fprintf(stderr,"Error writing image");
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exit(1);
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}
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written += i;
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size -= i;
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}
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return 0;
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}
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void usage(void)
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{
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printf("Usage: mtd [<options> ...] <command> [<arguments> ...] <device>\n\n"
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"The device is in the format of mtdX (eg: mtd4) or its label.\n"
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"mtd recognizes these commands:\n"
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" unlock unlock the device\n"
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" erase erase all data on device\n"
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" write <imagefile> write imagefile to device\n"
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"Following options are available:\n"
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" -r reboot after successful command\n"
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" -f force write without trx checks\n"
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" -e <device> erase <device> before executing the command\n\n"
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"Example: To write linux.trx to mtd4 labeled as linux and reboot afterwards\n"
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" mtd -r write linux.trx linux\n\n");
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exit(1);
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}
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int main (int argc, char **argv)
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{
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int ch, i, boot, unlock, trxfd, force;
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char *erase[MAX_ARGS], *device;
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enum {
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CMD_ERASE,
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CMD_WRITE,
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CMD_UNLOCK
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} cmd;
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erase[0] = NULL;
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boot = 0;
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force = 0;
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while ((ch = getopt(argc, argv, "fre:")) != -1)
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switch (ch) {
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case 'f':
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force = 1;
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break;
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case 'r':
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boot = 1;
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break;
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case 'e':
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i = 0;
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while ((erase[i] != NULL) && ((i + 1) < MAX_ARGS))
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i++;
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erase[i++] = optarg;
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erase[i] = NULL;
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break;
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case '?':
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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if (argc < 2)
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usage();
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if ((strcmp(argv[0], "unlock") == 0) && (argc == 2)) {
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cmd = CMD_UNLOCK;
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device = argv[1];
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} else if ((strcmp(argv[0], "erase") == 0) && (argc == 2)) {
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cmd = CMD_ERASE;
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device = argv[1];
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} else if ((strcmp(argv[0], "write") == 0) && (argc == 3)) {
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cmd = CMD_WRITE;
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device = argv[2];
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/* check trx file before erasing or writing anything */
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trxfd = trx_check(argv[1], device, force);
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} else {
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usage();
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}
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sync();
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i = 0;
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while (erase[i] != NULL) {
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mtd_unlock(erase[i]);
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mtd_erase(erase[i]);
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i++;
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}
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mtd_unlock(device);
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switch (cmd) {
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case CMD_UNLOCK:
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break;
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case CMD_ERASE:
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mtd_erase(device);
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break;
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case CMD_WRITE:
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mtd_write(trxfd, device);
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break;
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}
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if (boot)
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kill(1, 15); // send SIGTERM to init for reboot
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return 0;
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}
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