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mirror of git://projects.qi-hardware.com/openwrt-xburst.git synced 2024-12-25 10:15:11 +02:00
openwrt-xburst/package/openwrt/mtd.c
wbx ebd5c1149c add gmp, needed for openswan
git-svn-id: svn://svn.openwrt.org/openwrt/trunk/openwrt@448 3c298f89-4303-0410-b956-a3cf2f4a3e73
2005-03-24 21:11:24 +00:00

281 lines
7.0 KiB
C

/*
* mtd - simple memory technology device manipulation tool
*
* Copyright (C) 2005 Waldemar Brodkorb <wbx@dass-it.de>
*
* 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.
*
* mtd utility for the openwrt project
* it is mainly code from the linux-mtd project, which accepts the same
* command line arguments as the broadcom utility
*
* $Id$
*
*/
#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 <string.h>
#include <linux/mtd/mtd.h>
/* trx header */
#define TRX_MAGIC 0x30524448 /* "HDR0" */
#define TRX_VERSION 1
#define TRX_MAX_LEN 0x3A0000
#define TRX_NO_HEADER 1 /* Do not write TRX header */
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 */
};
#define BUFSIZE (10 * 1024)
extern int mtd_open(const char *mtd, int flags);
extern int mtd_erase(const char *mtd);
extern int mtd_write(const char *trxfile, const char *mtd);
extern int mtd_update(const char *trxfile, const char *mtd);
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);
}
mtdLockInfo.start = 0;
mtdLockInfo.length = mtdInfo.size;
if(ioctl(fd, MEMUNLOCK, &mtdLockInfo)) {
fprintf(stderr, "Could not unlock MTD device: %s\n", mtd);
close(fd);
exit(1);
}
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);
}
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(const char *trxfile, const char *mtd)
{
int fd;
int trxfd;
int i;
size_t result,size,written;
struct mtd_info_user mtdInfo;
struct erase_info_user mtdEraseInfo;
struct stat trxstat;
unsigned char src[BUFSIZE],dest[BUFSIZE];
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);
}
trxfd = open(trxfile,O_RDONLY);
if(trxfd < 0) {
fprintf(stderr, "Could not open trx image: %s\n", trxfile);
exit(1);
}
if (fstat (trxfd,&trxstat) < 0) {
fprintf(stderr, "Could not get trx image file status: %s\n", trxfile);
close(trxfd);
exit(1);
}
if(mtdInfo.size < trxstat.st_size) {
fprintf(stderr, "Image too big for partition: %s\n", mtd);
close(trxfd);
exit(1);
}
mtdEraseInfo.start = 0;
mtdEraseInfo.length = trxstat.st_size & ~(mtdInfo.erasesize -1);
if(trxstat.st_size % mtdInfo.erasesize) mtdEraseInfo.length += mtdInfo.erasesize;
/* erase the chunk */
if (ioctl (fd,MEMERASE,&mtdEraseInfo) < 0) {
fprintf(stderr, "Erasing mtd failed: %s\n", mtd);
exit(1);
}
size = trxstat.st_size;
i = BUFSIZE;
written = 0;
while (size) {
if (size < BUFSIZE) i = size;
read(trxfd,src,i);
result = write(fd,src,i);
if (i != result) {
if (result < 0) {
fprintf(stderr,"Error while writing image");
exit(1);
}
fprintf(stderr,"Error writing image");
exit(1);
}
written += i;
size -= i;
}
return 0;
}
int
mtd_update(const char *trxfile, const char *mtd)
{
if (mtd_erase("rootfs") != 0) {
fprintf(stderr, "Could not erase rootfs\n");
exit(1);
}
if (mtd_write(trxfile, mtd) != 0) {
fprintf(stderr, "Could not update %s with %s\n", mtd, trxfile);
exit(1);
}
return 0;
}
int main(int argc, char **argv) {
if(argc == 3 && strcasecmp(argv[1],"unlock")==0) {
printf("Unlocking %s ...\n",argv[2]);
return mtd_unlock(argv[2]);
}
if(argc == 3 && strcasecmp(argv[1],"erase")==0) {
printf("Erasing %s ...\n",argv[2]);
return mtd_erase(argv[2]);
}
if(argc == 4 && strcasecmp(argv[1],"write")==0) {
printf("Writing %s to %s ...\n",argv[2],argv[3]);
return mtd_write(argv[2],argv[3]);
}
if(argc == 4 && strcasecmp(argv[1],"update")==0) {
printf("Updating %s on %s ...\n",argv[2],argv[3]);
return mtd_update(argv[2],argv[3]);
}
printf("no valid command given\n");
printf("\nmtd: modify data within a Memory Technology Device.\n");
printf("Copyright (C) 2005 Waldemar Brodkorb <wbx@dass-it.de>\n");
printf("Documented by Mike Strates [dumpedcore] <mike@dilaudid.net>\n");
printf("mtd has ABSOLUTELY NO WARRANTY and is licensed under the GNU GPL.\n");
printf("\nUsage: mtd [unlock|erase] device\n");
printf(" mtd [write|update] imagefile device\n");
printf("\n.. where device is in the format of mtdX (eg: mtd4) or its label.\n\n");
printf("unlock enable modification to device\n");
printf("erase erase all data on device\n");
printf("write write imagefile to device\n");
printf("update remove rootfs and update imagefile on device\n");
printf("\nExample: To write linux.trx to mtd4 labeled as linux\n");
printf("\n mtd unlock linux && mtd write linux.trx linux\n\n");
return -1;
}