724 lines
15 KiB
C
724 lines
15 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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* Copyright (C) 2005-2009 Felix Fietkau <nbd@openwrt.org>
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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 v2
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* as published by the Free Software Foundation.
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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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*
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* The code is based on the linux-mtd examples.
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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 <signal.h>
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#include <sys/ioctl.h>
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#include <sys/syscall.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 <string.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 <linux/reboot.h>
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#include "mtd-api.h"
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#include "fis.h"
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#include "mtd.h"
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#define MAX_ARGS 8
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#define JFFS2_DEFAULT_DIR "" /* directory name without /, empty means root dir */
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static char *buf = NULL;
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static char *imagefile = NULL;
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static char *jffs2file = NULL, *jffs2dir = JFFS2_DEFAULT_DIR;
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static int buflen = 0;
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int quiet;
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int no_erase;
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int mtdsize = 0;
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int erasesize = 0;
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int mtd_open(const char *mtd, bool block)
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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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int ret;
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int flags = O_RDWR | O_SYNC;
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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%s/%d", (block ? "block" : ""), i);
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if ((ret=open(dev, flags))<0) {
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snprintf(dev, sizeof(dev), "/dev/mtd%s%d", (block ? "block" : ""), i);
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ret=open(dev, flags);
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}
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fclose(fp);
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return ret;
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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 mtd_check_open(const char *mtd)
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{
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struct mtd_info_user mtdInfo;
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int fd;
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fd = mtd_open(mtd, false);
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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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return -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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return -1;
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}
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mtdsize = mtdInfo.size;
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erasesize = mtdInfo.erasesize;
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return fd;
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}
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int mtd_erase_block(int fd, int offset)
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{
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struct erase_info_user mtdEraseInfo;
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mtdEraseInfo.start = offset;
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mtdEraseInfo.length = erasesize;
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ioctl(fd, MEMUNLOCK, &mtdEraseInfo);
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if (ioctl (fd, MEMERASE, &mtdEraseInfo) < 0)
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return -1;
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return 0;
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}
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int mtd_write_buffer(int fd, const char *buf, int offset, int length)
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{
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lseek(fd, offset, SEEK_SET);
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write(fd, buf, length);
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return 0;
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}
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static int
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image_check(int imagefd, const char *mtd)
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{
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int ret = 1;
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if (trx_check) {
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ret = trx_check(imagefd, mtd, buf, &buflen);
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}
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return ret;
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}
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static int mtd_check(const char *mtd)
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{
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char *next = NULL;
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char *str = NULL;
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int fd;
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if (strchr(mtd, ':')) {
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str = strdup(mtd);
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mtd = str;
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}
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do {
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next = strchr(mtd, ':');
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if (next) {
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*next = 0;
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next++;
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}
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fd = mtd_check_open(mtd);
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if (fd < 0)
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return 0;
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if (!buf)
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buf = malloc(erasesize);
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close(fd);
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mtd = next;
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} while (next);
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if (str)
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free(str);
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return 1;
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}
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static int
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mtd_unlock(const char *mtd)
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{
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struct erase_info_user mtdLockInfo;
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char *next = NULL;
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char *str = NULL;
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int fd;
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if (strchr(mtd, ':')) {
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str = strdup(mtd);
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mtd = str;
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}
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do {
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next = strchr(mtd, ':');
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if (next) {
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*next = 0;
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next++;
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}
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fd = mtd_check_open(mtd);
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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 (quiet < 2)
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fprintf(stderr, "Unlocking %s ...\n", mtd);
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mtdLockInfo.start = 0;
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mtdLockInfo.length = mtdsize;
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ioctl(fd, MEMUNLOCK, &mtdLockInfo);
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close(fd);
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mtd = next;
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} while (next);
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if (str)
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free(str);
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return 0;
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}
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static 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 erase_info_user mtdEraseInfo;
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if (quiet < 2)
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fprintf(stderr, "Erasing %s ...\n", mtd);
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fd = mtd_check_open(mtd);
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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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mtdEraseInfo.length = erasesize;
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for (mtdEraseInfo.start = 0;
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mtdEraseInfo.start < mtdsize;
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mtdEraseInfo.start += erasesize) {
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ioctl(fd, MEMUNLOCK, &mtdEraseInfo);
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if(ioctl(fd, MEMERASE, &mtdEraseInfo))
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fprintf(stderr, "Failed to erase block on %s at 0x%x\n", mtd, mtdEraseInfo.start);
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}
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close(fd);
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return 0;
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}
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static int
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mtd_refresh(const char *mtd)
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{
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int fd;
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if (quiet < 2)
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fprintf(stderr, "Refreshing mtd partition %s ... ", mtd);
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fd = mtd_check_open(mtd);
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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, MTDREFRESH, NULL)) {
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fprintf(stderr, "Failed to refresh the MTD device\n");
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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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if (quiet < 2)
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fprintf(stderr, "\n");
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return 0;
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}
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static void
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indicate_writing(const char *mtd)
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{
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if (quiet < 2)
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fprintf(stderr, "\nWriting from %s to %s ... ", imagefile, mtd);
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if (!quiet)
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fprintf(stderr, " [ ]");
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}
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static int
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mtd_write(int imagefd, const char *mtd, char *fis_layout)
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{
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char *next = NULL;
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char *str = NULL;
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int fd, result;
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ssize_t r, w, e;
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ssize_t skip = 0;
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uint32_t offset = 0;
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#ifdef FIS_SUPPORT
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static struct fis_part new_parts[MAX_ARGS];
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static struct fis_part old_parts[MAX_ARGS];
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int n_new = 0, n_old = 0;
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if (fis_layout) {
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const char *tmp = mtd;
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char *word, *brkt;
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int ret;
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memset(&old_parts, 0, sizeof(old_parts));
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memset(&new_parts, 0, sizeof(new_parts));
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do {
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next = strchr(tmp, ':');
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if (!next)
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next = (char *) tmp + strlen(tmp);
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memcpy(old_parts[n_old].name, tmp, next - tmp);
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n_old++;
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tmp = next + 1;
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} while(*next);
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for (word = strtok_r(fis_layout, ",", &brkt);
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word;
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word = strtok_r(NULL, ",", &brkt)) {
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tmp = strtok(word, ":");
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strncpy((char *) new_parts[n_new].name, tmp, sizeof(new_parts[n_new].name) - 1);
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tmp = strtok(NULL, ":");
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if (!tmp)
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goto next;
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new_parts[n_new].size = strtoul(tmp, NULL, 0);
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tmp = strtok(NULL, ":");
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if (!tmp)
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goto next;
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new_parts[n_new].loadaddr = strtoul(tmp, NULL, 16);
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next:
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n_new++;
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}
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ret = fis_validate(old_parts, n_old, new_parts, n_new);
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if (ret < 0) {
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fprintf(stderr, "Failed to validate the new FIS partition table\n");
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exit(1);
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}
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if (ret == 0)
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fis_layout = NULL;
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}
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#endif
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if (strchr(mtd, ':')) {
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str = strdup(mtd);
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mtd = str;
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}
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r = 0;
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resume:
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next = strchr(mtd, ':');
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if (next) {
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*next = 0;
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next++;
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}
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fd = mtd_check_open(mtd);
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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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indicate_writing(mtd);
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w = e = 0;
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for (;;) {
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/* buffer may contain data already (from trx check or last mtd partition write attempt) */
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while (buflen < erasesize) {
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r = read(imagefd, buf + buflen, erasesize - buflen);
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if (r < 0) {
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if ((errno == EINTR) || (errno == EAGAIN))
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continue;
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else {
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perror("read");
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break;
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}
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}
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if (r == 0)
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break;
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buflen += r;
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}
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if (buflen == 0)
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break;
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if (skip > 0) {
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skip -= buflen;
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buflen = 0;
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if (skip <= 0)
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indicate_writing(mtd);
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continue;
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}
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if (jffs2file) {
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if (memcmp(buf, JFFS2_EOF, sizeof(JFFS2_EOF) - 1) == 0) {
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if (!quiet)
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fprintf(stderr, "\b\b\b ");
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if (quiet < 2)
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fprintf(stderr, "\nAppending jffs2 data from %s to %s...", jffs2file, mtd);
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/* got an EOF marker - this is the place to add some jffs2 data */
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skip = mtd_replace_jffs2(mtd, fd, e, jffs2file);
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w += skip;
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e += skip;
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skip -= buflen;
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buflen = 0;
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offset = 0;
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continue;
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}
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/* no EOF marker, make sure we figure out the last inode number
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* before appending some data */
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mtd_parse_jffs2data(buf, jffs2dir);
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}
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|
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/* need to erase the next block before writing data to it */
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if(!no_erase)
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{
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while (w + buflen > e) {
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if (!quiet)
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fprintf(stderr, "\b\b\b[e]");
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|
|
|
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if (mtd_erase_block(fd, e) < 0) {
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if (next) {
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if (w < e) {
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write(fd, buf + offset, e - w);
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offset = e - w;
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}
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w = 0;
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e = 0;
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close(fd);
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mtd = next;
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fprintf(stderr, "\b\b\b \n");
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goto resume;
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} else {
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fprintf(stderr, "Failed to erase block\n");
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exit(1);
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}
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}
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/* erase the chunk */
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e += erasesize;
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}
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}
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if (!quiet)
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fprintf(stderr, "\b\b\b[w]");
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|
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if ((result = write(fd, buf + offset, buflen)) < buflen) {
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if (result < 0) {
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fprintf(stderr, "Error writing image.\n");
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exit(1);
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} else {
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fprintf(stderr, "Insufficient space.\n");
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exit(1);
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}
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}
|
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w += buflen;
|
|
|
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buflen = 0;
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offset = 0;
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}
|
|
|
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if (!quiet)
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fprintf(stderr, "\b\b\b\b ");
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done:
|
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if (quiet < 2)
|
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fprintf(stderr, "\n");
|
|
|
|
#ifdef FIS_SUPPORT
|
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if (fis_layout) {
|
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if (fis_remap(old_parts, n_old, new_parts, n_new) < 0)
|
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fprintf(stderr, "Failed to update the FIS partition table\n");
|
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}
|
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#endif
|
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|
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close(fd);
|
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return 0;
|
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}
|
|
|
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static void usage(void)
|
|
{
|
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fprintf(stderr, "Usage: mtd [<options> ...] <command> [<arguments> ...] <device>[:<device>...]\n\n"
|
|
"The device is in the format of mtdX (eg: mtd4) or its label.\n"
|
|
"mtd recognizes these commands:\n"
|
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" unlock unlock the device\n"
|
|
" refresh refresh mtd partition\n"
|
|
" erase erase all data on device\n"
|
|
" write <imagefile>|- write <imagefile> (use - for stdin) to device\n"
|
|
" jffs2write <file> append <file> to the jffs2 partition on the device\n");
|
|
if (mtd_fixtrx) {
|
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fprintf(stderr,
|
|
" fixtrx fix the checksum in a trx header on first boot\n");
|
|
}
|
|
fprintf(stderr,
|
|
"Following options are available:\n"
|
|
" -q quiet mode (once: no [w] on writing,\n"
|
|
" twice: no status messages)\n"
|
|
" -n write without first erasing the blocks\n"
|
|
" -r reboot after successful command\n"
|
|
" -f force write without trx checks\n"
|
|
" -e <device> erase <device> before executing the command\n"
|
|
" -d <name> directory for jffs2write, defaults to \"tmp\"\n"
|
|
" -j <name> integrate <file> into jffs2 data when writing an image\n");
|
|
if (mtd_fixtrx) {
|
|
fprintf(stderr,
|
|
" -o offset offset of the image header in the partition(for fixtrx)\n");
|
|
}
|
|
fprintf(stderr,
|
|
#ifdef FIS_SUPPORT
|
|
" -F <part>[:<size>[:<entrypoint>]][,<part>...]\n"
|
|
" alter the fis partition table to create new partitions replacing\n"
|
|
" the partitions provided as argument to the write command\n"
|
|
" (only valid together with the write command)\n"
|
|
#endif
|
|
"\n"
|
|
"Example: To write linux.trx to mtd4 labeled as linux and reboot afterwards\n"
|
|
" mtd -r write linux.trx linux\n\n");
|
|
exit(1);
|
|
}
|
|
|
|
static void do_reboot(void)
|
|
{
|
|
fprintf(stderr, "Rebooting ...\n");
|
|
fflush(stderr);
|
|
|
|
/* try regular reboot method first */
|
|
system("/sbin/reboot");
|
|
sleep(2);
|
|
|
|
/* if we're still alive at this point, force the kernel to reboot */
|
|
syscall(SYS_reboot,LINUX_REBOOT_MAGIC1,LINUX_REBOOT_MAGIC2,LINUX_REBOOT_CMD_RESTART,NULL);
|
|
}
|
|
|
|
int main (int argc, char **argv)
|
|
{
|
|
int ch, i, boot, imagefd = 0, force, unlocked;
|
|
char *erase[MAX_ARGS], *device = NULL;
|
|
char *fis_layout = NULL;
|
|
size_t offset = 0;
|
|
enum {
|
|
CMD_ERASE,
|
|
CMD_WRITE,
|
|
CMD_UNLOCK,
|
|
CMD_REFRESH,
|
|
CMD_JFFS2WRITE,
|
|
CMD_FIXTRX,
|
|
} cmd = -1;
|
|
|
|
erase[0] = NULL;
|
|
boot = 0;
|
|
force = 0;
|
|
buflen = 0;
|
|
quiet = 0;
|
|
no_erase = 0;
|
|
|
|
while ((ch = getopt(argc, argv,
|
|
#ifdef FIS_SUPPORT
|
|
"F:"
|
|
#endif
|
|
"frnqe:d:j:o:")) != -1)
|
|
switch (ch) {
|
|
case 'f':
|
|
force = 1;
|
|
break;
|
|
case 'r':
|
|
boot = 1;
|
|
break;
|
|
case 'n':
|
|
no_erase = 1;
|
|
break;
|
|
case 'j':
|
|
jffs2file = optarg;
|
|
break;
|
|
case 'q':
|
|
quiet++;
|
|
break;
|
|
case 'e':
|
|
i = 0;
|
|
while ((erase[i] != NULL) && ((i + 1) < MAX_ARGS))
|
|
i++;
|
|
|
|
erase[i++] = optarg;
|
|
erase[i] = NULL;
|
|
break;
|
|
case 'd':
|
|
jffs2dir = optarg;
|
|
break;
|
|
case 'o':
|
|
if (!mtd_fixtrx) {
|
|
fprintf(stderr, "-o: is not available on this platform\n");
|
|
usage();
|
|
}
|
|
errno = 0;
|
|
offset = strtoul(optarg, 0, 0);
|
|
if (errno) {
|
|
fprintf(stderr, "-o: illegal numeric string\n");
|
|
usage();
|
|
}
|
|
break;
|
|
#ifdef FIS_SUPPORT
|
|
case 'F':
|
|
fis_layout = optarg;
|
|
break;
|
|
#endif
|
|
case '?':
|
|
default:
|
|
usage();
|
|
}
|
|
argc -= optind;
|
|
argv += optind;
|
|
|
|
if (argc < 2)
|
|
usage();
|
|
|
|
if ((strcmp(argv[0], "unlock") == 0) && (argc == 2)) {
|
|
cmd = CMD_UNLOCK;
|
|
device = argv[1];
|
|
} else if ((strcmp(argv[0], "refresh") == 0) && (argc == 2)) {
|
|
cmd = CMD_REFRESH;
|
|
device = argv[1];
|
|
} else if ((strcmp(argv[0], "erase") == 0) && (argc == 2)) {
|
|
cmd = CMD_ERASE;
|
|
device = argv[1];
|
|
} else if (((strcmp(argv[0], "fixtrx") == 0) && (argc == 2)) && mtd_fixtrx) {
|
|
cmd = CMD_FIXTRX;
|
|
device = argv[1];
|
|
} else if ((strcmp(argv[0], "write") == 0) && (argc == 3)) {
|
|
cmd = CMD_WRITE;
|
|
device = argv[2];
|
|
|
|
if (strcmp(argv[1], "-") == 0) {
|
|
imagefile = "<stdin>";
|
|
imagefd = 0;
|
|
} else {
|
|
imagefile = argv[1];
|
|
if ((imagefd = open(argv[1], O_RDONLY)) < 0) {
|
|
fprintf(stderr, "Couldn't open image file: %s!\n", imagefile);
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
if (!mtd_check(device)) {
|
|
fprintf(stderr, "Can't open device for writing!\n");
|
|
exit(1);
|
|
}
|
|
/* check trx file before erasing or writing anything */
|
|
if (!image_check(imagefd, device) && !force) {
|
|
fprintf(stderr, "Image check failed.\n");
|
|
exit(1);
|
|
}
|
|
} else if ((strcmp(argv[0], "jffs2write") == 0) && (argc == 3)) {
|
|
cmd = CMD_JFFS2WRITE;
|
|
device = argv[2];
|
|
|
|
imagefile = argv[1];
|
|
if (!mtd_check(device)) {
|
|
fprintf(stderr, "Can't open device for writing!\n");
|
|
exit(1);
|
|
}
|
|
} else {
|
|
usage();
|
|
}
|
|
|
|
sync();
|
|
|
|
i = 0;
|
|
unlocked = 0;
|
|
while (erase[i] != NULL) {
|
|
mtd_unlock(erase[i]);
|
|
mtd_erase(erase[i]);
|
|
if (strcmp(erase[i], device) == 0)
|
|
unlocked = 1;
|
|
i++;
|
|
}
|
|
|
|
switch (cmd) {
|
|
case CMD_UNLOCK:
|
|
if (!unlocked)
|
|
mtd_unlock(device);
|
|
break;
|
|
case CMD_ERASE:
|
|
if (!unlocked)
|
|
mtd_unlock(device);
|
|
mtd_erase(device);
|
|
break;
|
|
case CMD_WRITE:
|
|
if (!unlocked)
|
|
mtd_unlock(device);
|
|
mtd_write(imagefd, device, fis_layout);
|
|
break;
|
|
case CMD_JFFS2WRITE:
|
|
if (!unlocked)
|
|
mtd_unlock(device);
|
|
mtd_write_jffs2(device, imagefile, jffs2dir);
|
|
break;
|
|
case CMD_REFRESH:
|
|
mtd_refresh(device);
|
|
break;
|
|
case CMD_FIXTRX:
|
|
if (mtd_fixtrx) {
|
|
mtd_fixtrx(device, offset);
|
|
}
|
|
break;
|
|
}
|
|
|
|
sync();
|
|
|
|
if (boot)
|
|
do_reboot();
|
|
|
|
return 0;
|
|
}
|