+/*
+ * mtd - simple memory technology device manipulation tool
+ *
+ * Copyright (C) 2005 Waldemar Brodkorb <wbx@dass-it.de>,
+ * Felix Fietkau <nbd@vd-s.ath.cx>
+ *
+ * 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.
+ *
+ * $Id$
+ *
+ * code is based on linux-mtd example code
+ */
+
+#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 (10 * 1024)
+#define MAX_ARGS 8
+
+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 */
+};
+
+int
+trx_check(const char *trxfile, const char *mtd)
+{
+ struct mtd_info_user mtdInfo;
+ int trxfd, fd;
+ size_t count;
+ struct trx_header trx;
+ struct stat trxstat;
+
+ 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);
+ }
+
+ count = read(trxfd, &trx, sizeof(struct trx_header));
+ if (count < sizeof(struct trx_header)) {
+ fprintf(stderr, "Could not trx header, file too small (%ld bytes)\n", count);
+ close(trxfd);
+ exit(1);
+ }
+
+ 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");
+ close(trxfd);
+ exit(1);
+ }
+
+ lseek(trxfd, 0, SEEK_SET);
+
+ /* 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);
+ close(fd);
+ exit(1);
+ }
+
+ if(mtdInfo.size < trxstat.st_size) {
+ fprintf(stderr, "Image too big for partition: %s\n", mtd);
+ close(trxfd);
+ close(fd);
+ exit(1);
+ }
+
+ printf("Writing %s to %s ...\n", trxfile, mtd);
+
+ close(fd);
+
+ return(trxfd);
+}
+
+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);
+ }
+
+ printf("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);
+ }
+
+ printf("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 trxfd, const char *mtd)
+{
+ int fd,i;
+ size_t result,size,written;
+ struct mtd_info_user mtdInfo;
+ struct erase_info_user mtdEraseInfo;
+ unsigned char src[BUFSIZE],dest[BUFSIZE];
+ struct stat trxstat;
+
+ if (fstat(trxfd,&trxstat) < 0) {
+ fprintf(stderr, "Could not get trx image file status\n");
+ close(trxfd);
+ exit(1);
+ }
+
+ 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.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;
+}
+
+void usage(void)
+{
+ printf("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 to device\n"
+ "Following options are available:\n"
+ " -r reboot after successful command\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, trxfd;
+ char *erase[MAX_ARGS], *device;
+ enum {
+ CMD_ERASE,
+ CMD_WRITE,
+ CMD_UNLOCK
+ } cmd;
+
+ erase[0] = NULL;
+ boot = 0;
+
+ while ((ch = getopt(argc, argv, "re:")) != -1)
+ switch (ch) {
+ 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];
+ /* check trx file before erasing or writing anything */
+ trxfd = trx_check(argv[1], device);
+ } 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:
+ mtd_write(trxfd, device);
+ break;
+ }
+
+ if (boot)
+ kill(1, 15); // send SIGTERM to init for reboot
+
+ return 0;
+}
projects / openwrt.git / commitdiff