mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
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281 lines
7.0 KiB
C
281 lines
7.0 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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*
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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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* mtd utility for the openwrt project
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* it is mainly code from the linux-mtd project, which accepts the same
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* command line arguments as the broadcom utility
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*
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* $Id$
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*
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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 <string.h>
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#include <linux/mtd/mtd.h>
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/* trx header */
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#define TRX_MAGIC 0x30524448 /* "HDR0" */
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#define TRX_VERSION 1
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#define TRX_MAX_LEN 0x3A0000
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#define TRX_NO_HEADER 1 /* Do not write TRX header */
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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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#define BUFSIZE (10 * 1024)
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extern int mtd_open(const char *mtd, int flags);
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extern int mtd_erase(const char *mtd);
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extern int mtd_write(const char *trxfile, const char *mtd);
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extern int mtd_update(const char *trxfile, const char *mtd);
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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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mtdLockInfo.start = 0;
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mtdLockInfo.length = mtdInfo.size;
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if(ioctl(fd, MEMUNLOCK, &mtdLockInfo)) {
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fprintf(stderr, "Could not unlock 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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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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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(const char *trxfile, const char *mtd)
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{
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int fd;
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int trxfd;
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int 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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struct stat trxstat;
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unsigned char src[BUFSIZE],dest[BUFSIZE];
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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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trxfd = open(trxfile,O_RDONLY);
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if(trxfd < 0) {
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fprintf(stderr, "Could not open trx 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 trx 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(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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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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int
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mtd_update(const char *trxfile, const char *mtd)
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{
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if (mtd_erase("rootfs") != 0) {
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fprintf(stderr, "Could not erase rootfs\n");
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exit(1);
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}
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if (mtd_write(trxfile, mtd) != 0) {
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fprintf(stderr, "Could not update %s with %s\n", mtd, trxfile);
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exit(1);
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}
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return 0;
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}
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int main(int argc, char **argv) {
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if(argc == 3 && strcasecmp(argv[1],"unlock")==0) {
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printf("Unlocking %s ...\n",argv[2]);
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return mtd_unlock(argv[2]);
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}
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if(argc == 3 && strcasecmp(argv[1],"erase")==0) {
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printf("Erasing %s ...\n",argv[2]);
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return mtd_erase(argv[2]);
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}
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if(argc == 4 && strcasecmp(argv[1],"write")==0) {
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printf("Writing %s to %s ...\n",argv[2],argv[3]);
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return mtd_write(argv[2],argv[3]);
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}
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if(argc == 4 && strcasecmp(argv[1],"update")==0) {
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printf("Updating %s on %s ...\n",argv[2],argv[3]);
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return mtd_update(argv[2],argv[3]);
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}
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printf("no valid command given\n");
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printf("\nmtd: modify data within a Memory Technology Device.\n");
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printf("Copyright (C) 2005 Waldemar Brodkorb <wbx@dass-it.de>\n");
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printf("Documented by Mike Strates [dumpedcore] <mike@dilaudid.net>\n");
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printf("mtd has ABSOLUTELY NO WARRANTY and is licensed under the GNU GPL.\n");
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printf("\nUsage: mtd [unlock|erase] device\n");
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printf(" mtd [write|update] imagefile device\n");
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printf("\n.. where device is in the format of mtdX (eg: mtd4) or its label.\n\n");
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printf("unlock enable modification to device\n");
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printf("erase erase all data on device\n");
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printf("write write imagefile to device\n");
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printf("update remove rootfs and update imagefile on device\n");
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printf("\nExample: To write linux.trx to mtd4 labeled as linux\n");
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printf("\n mtd unlock linux && mtd write linux.trx linux\n\n");
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return -1;
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}
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