2 * mtd - simple memory technology device manipulation tool
4 * Copyright (C) 2005 Waldemar Brodkorb <wbx@dass-it.de>,
5 * Felix Fietkau <nbd@vd-s.ath.cx>
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
23 * code is based on linux-mtd example code
35 #include <sys/ioctl.h>
36 #include <sys/types.h>
37 #include <sys/param.h>
38 #include <sys/mount.h>
40 #include <sys/reboot.h>
43 #include <linux/mtd/mtd.h>
45 #define TRX_MAGIC 0x30524448 /* "HDR0" */
46 #define BUFSIZE (10 * 1024)
50 uint32_t magic; /* "HDR0" */
51 uint32_t len; /* Length of file including header */
52 uint32_t crc32; /* 32-bit CRC from flag_version to end of file */
53 uint32_t flag_version; /* 0:15 flags, 16:31 version */
54 uint32_t offsets[3]; /* Offsets of partitions from start of header */
58 trx_check(const char *trxfile, const char *mtd)
60 struct mtd_info_user mtdInfo;
63 struct trx_header trx;
66 trxfd = open(trxfile,O_RDONLY);
68 fprintf(stderr, "Could not open trx image: %s\n", trxfile);
72 if (fstat(trxfd,&trxstat) < 0) {
73 fprintf(stderr, "Could not get trx image file status: %s\n", trxfile);
78 count = read(trxfd, &trx, sizeof(struct trx_header));
79 if (count < sizeof(struct trx_header)) {
80 fprintf(stderr, "Could not trx header, file too small (%ld bytes)\n", count);
85 if (trx.magic != TRX_MAGIC || trx.len < sizeof(struct trx_header)) {
86 fprintf(stderr, "Bad trx header\n");
87 fprintf(stderr, "If this is a firmware in bin format, like some of the\n"
88 "original firmware files are, use following command to convert to trx:\n"
89 "dd if=firmware.bin of=firmware.trx bs=32 skip=1\n");
94 lseek(trxfd, 0, SEEK_SET);
96 /* check if image fits to mtd device */
98 fd = mtd_open(mtd, O_RDWR);
100 fprintf(stderr, "Could not open mtd device: %s\n", mtd);
104 if(ioctl(fd, MEMGETINFO, &mtdInfo)) {
105 fprintf(stderr, "Could not get MTD device info from %s\n", mtd);
110 if(mtdInfo.size < trxstat.st_size) {
111 fprintf(stderr, "Image too big for partition: %s\n", mtd);
117 printf("Writing %s to %s ...\n", trxfile, mtd);
125 mtd_unlock(const char *mtd)
128 struct mtd_info_user mtdInfo;
129 struct erase_info_user mtdLockInfo;
131 fd = mtd_open(mtd, O_RDWR);
133 fprintf(stderr, "Could not open mtd device: %s\n", mtd);
137 if(ioctl(fd, MEMGETINFO, &mtdInfo)) {
138 fprintf(stderr, "Could not get MTD device info from %s\n", mtd);
143 printf("Unlocking %s ...\n", mtd);
144 mtdLockInfo.start = 0;
145 mtdLockInfo.length = mtdInfo.size;
146 if(ioctl(fd, MEMUNLOCK, &mtdLockInfo)) {
156 mtd_open(const char *mtd, int flags)
162 if ((fp = fopen("/proc/mtd", "r"))) {
163 while (fgets(dev, sizeof(dev), fp)) {
164 if (sscanf(dev, "mtd%d:", &i) && strstr(dev, mtd)) {
165 snprintf(dev, sizeof(dev), "/dev/mtd/%d", i);
167 return open(dev, flags);
173 return open(mtd, flags);
177 mtd_erase(const char *mtd)
180 struct mtd_info_user mtdInfo;
181 struct erase_info_user mtdEraseInfo;
183 fd = mtd_open(mtd, O_RDWR);
185 fprintf(stderr, "Could not open mtd device: %s\n", mtd);
189 if(ioctl(fd, MEMGETINFO, &mtdInfo)) {
190 fprintf(stderr, "Could not get MTD device info from %s\n", mtd);
195 printf("Erasing %s ...\n", mtd);
196 mtdEraseInfo.length = mtdInfo.erasesize;
198 for (mtdEraseInfo.start = 0;
199 mtdEraseInfo.start < mtdInfo.size;
200 mtdEraseInfo.start += mtdInfo.erasesize) {
202 ioctl(fd, MEMUNLOCK, &mtdEraseInfo);
203 if(ioctl(fd, MEMERASE, &mtdEraseInfo)) {
204 fprintf(stderr, "Could not erase MTD device: %s\n", mtd);
216 mtd_write(int trxfd, const char *mtd)
219 size_t result,size,written;
220 struct mtd_info_user mtdInfo;
221 struct erase_info_user mtdEraseInfo;
222 unsigned char src[BUFSIZE],dest[BUFSIZE];
225 if (fstat(trxfd,&trxstat) < 0) {
226 fprintf(stderr, "Could not get trx image file status\n");
231 fd = mtd_open(mtd, O_RDWR);
233 fprintf(stderr, "Could not open mtd device: %s\n", mtd);
237 if(ioctl(fd, MEMGETINFO, &mtdInfo)) {
238 fprintf(stderr, "Could not get MTD device info from %s\n", mtd);
243 mtdEraseInfo.start = 0;
244 mtdEraseInfo.length = trxstat.st_size & ~(mtdInfo.erasesize -1);
245 if(trxstat.st_size % mtdInfo.erasesize) mtdEraseInfo.length += mtdInfo.erasesize;
247 /* erase the chunk */
248 if (ioctl (fd,MEMERASE,&mtdEraseInfo) < 0) {
249 fprintf(stderr, "Erasing mtd failed: %s\n", mtd);
253 size = trxstat.st_size;
258 if (size < BUFSIZE) i = size;
260 result = write(fd,src,i);
263 fprintf(stderr,"Error while writing image");
266 fprintf(stderr,"Error writing image");
278 printf("Usage: mtd [<options> ...] <command> [<arguments> ...] <device>\n\n"
279 "The device is in the format of mtdX (eg: mtd4) or its label.\n"
280 "mtd recognizes these commands:\n"
281 " unlock unlock the device\n"
282 " erase erase all data on device\n"
283 " write <imagefile> write imagefile to device\n"
284 "Following options are available:\n"
285 " -r reboot after successful command\n"
286 " -e <device> erase <device> before executing the command\n\n"
287 "Example: To write linux.trx to mtd4 labeled as linux and reboot afterwards\n"
288 " mtd -r write linux.trx linux\n\n");
292 int main (int argc, char **argv)
294 int ch, i, boot, unlock, trxfd;
295 char *erase[MAX_ARGS], *device;
305 while ((ch = getopt(argc, argv, "re:")) != -1)
312 while ((erase[i] != NULL) && ((i + 1) < MAX_ARGS))
329 if ((strcmp(argv[0], "unlock") == 0) && (argc == 2)) {
332 } else if ((strcmp(argv[0], "erase") == 0) && (argc == 2)) {
335 } else if ((strcmp(argv[0], "write") == 0) && (argc == 3)) {
338 /* check trx file before erasing or writing anything */
339 trxfd = trx_check(argv[1], device);
347 while (erase[i] != NULL) {
348 mtd_unlock(erase[i]);
362 mtd_write(trxfd, device);
367 kill(1, 15); // send SIGTERM to init for reboot