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openwrt-xburst/package/mtd/mtd.c
nbd a7228a143b fix small trx_check bug in mtd
git-svn-id: svn://svn.openwrt.org/openwrt/trunk/openwrt@2455 3c298f89-4303-0410-b956-a3cf2f4a3e73
2005-11-12 21:21:27 +00:00

409 lines
8.9 KiB
C

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