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 mtd_unlock(const char *mtd)
61 struct mtd_info_user mtdInfo;
62 struct erase_info_user mtdLockInfo;
64 fd = mtd_open(mtd, O_RDWR);
66 fprintf(stderr, "Could not open mtd device: %s\n", mtd);
70 if(ioctl(fd, MEMGETINFO, &mtdInfo)) {
71 fprintf(stderr, "Could not get MTD device info from %s\n", mtd);
76 printf("Unlocking %s ...\n", mtd);
77 mtdLockInfo.start = 0;
78 mtdLockInfo.length = mtdInfo.size;
79 if(ioctl(fd, MEMUNLOCK, &mtdLockInfo)) {
89 mtd_open(const char *mtd, int flags)
95 if ((fp = fopen("/proc/mtd", "r"))) {
96 while (fgets(dev, sizeof(dev), fp)) {
97 if (sscanf(dev, "mtd%d:", &i) && strstr(dev, mtd)) {
98 snprintf(dev, sizeof(dev), "/dev/mtd/%d", i);
100 return open(dev, flags);
106 return open(mtd, flags);
110 mtd_erase(const char *mtd)
113 struct mtd_info_user mtdInfo;
114 struct erase_info_user mtdEraseInfo;
116 fd = mtd_open(mtd, O_RDWR);
118 fprintf(stderr, "Could not open mtd device: %s\n", mtd);
122 if(ioctl(fd, MEMGETINFO, &mtdInfo)) {
123 fprintf(stderr, "Could not get MTD device info from %s\n", mtd);
128 printf("Erasing %s ...\n", mtd);
129 mtdEraseInfo.length = mtdInfo.erasesize;
131 for (mtdEraseInfo.start = 0;
132 mtdEraseInfo.start < mtdInfo.size;
133 mtdEraseInfo.start += mtdInfo.erasesize) {
135 ioctl(fd, MEMUNLOCK, &mtdEraseInfo);
136 if(ioctl(fd, MEMERASE, &mtdEraseInfo)) {
137 fprintf(stderr, "Could not erase MTD device: %s\n", mtd);
149 mtd_write(const char *trxfile, const char *mtd)
152 struct trx_header trx;
153 size_t count,result,size,written;
154 struct mtd_info_user mtdInfo;
155 struct erase_info_user mtdEraseInfo;
157 unsigned char src[BUFSIZE],dest[BUFSIZE];
159 trxfd = open(trxfile,O_RDONLY);
161 fprintf(stderr, "Could not open trx image: %s\n", trxfile);
165 if (fstat(trxfd,&trxstat) < 0) {
166 fprintf(stderr, "Could not get trx image file status: %s\n", trxfile);
171 count = read(trxfd, &trx, sizeof(struct trx_header));
172 if (count < sizeof(struct trx_header)) {
173 fprintf(stderr, "Could not trx header, file too small (%ld bytes)\n", count);
178 if (trx.magic != TRX_MAGIC || trx.len < sizeof(struct trx_header)) {
179 fprintf(stderr, "Bad trx header\n");
180 fprintf(stderr, "If this is a firmware in bin format, like some of the\n"
181 "original firmware files are, use following command to convert to trx:\n"
182 "dd if=firmware.bin of=firmware.trx bs=32 skip=1\n");
187 lseek(trxfd, 0, SEEK_SET);
189 fd = mtd_open(mtd, O_RDWR);
191 fprintf(stderr, "Could not open mtd device: %s\n", mtd);
195 if(ioctl(fd, MEMGETINFO, &mtdInfo)) {
196 fprintf(stderr, "Could not get MTD device info from %s\n", mtd);
201 if(mtdInfo.size < trxstat.st_size) {
202 fprintf(stderr, "Image too big for partition: %s\n", mtd);
207 printf("Writing %s to %s ...\n", trxfile, mtd);
209 mtdEraseInfo.start = 0;
210 mtdEraseInfo.length = trxstat.st_size & ~(mtdInfo.erasesize -1);
211 if(trxstat.st_size % mtdInfo.erasesize) mtdEraseInfo.length += mtdInfo.erasesize;
213 /* erase the chunk */
214 if (ioctl (fd,MEMERASE,&mtdEraseInfo) < 0) {
215 fprintf(stderr, "Erasing mtd failed: %s\n", mtd);
219 size = trxstat.st_size;
224 if (size < BUFSIZE) i = size;
226 result = write(fd,src,i);
229 fprintf(stderr,"Error while writing image");
232 fprintf(stderr,"Error writing image");
244 printf("Usage: mtd [<options> ...] <command> [<arguments> ...] <device>\n\n"
245 "The device is in the format of mtdX (eg: mtd4) or its label.\n"
246 "mtd recognizes these commands:\n"
247 " unlock unlock the device\n"
248 " erase erase all data on device\n"
249 " write <imagefile> write imagefile to device\n"
250 "Following options are available:\n"
251 " -r reboot after successful command\n"
252 " -e <device> erase <device> before executing the command\n\n"
253 "Example: To write linux.trx to mtd4 labeled as linux and reboot afterwards\n"
254 " mtd -r write linux.trx linux\n\n");
258 int main (int argc, char **argv)
260 int ch, i, boot, unlock;
261 char *erase[MAX_ARGS], *device;
271 while ((ch = getopt(argc, argv, "re:")) != -1)
278 while ((erase[i] != NULL) && ((i + 1) < MAX_ARGS))
295 if ((strcmp(argv[0], "unlock") == 0) && (argc == 2)) {
298 } else if ((strcmp(argv[0], "erase") == 0) && (argc == 2)) {
301 } else if ((strcmp(argv[0], "write") == 0) && (argc == 3)) {
311 while (erase[i] != NULL) {
312 mtd_unlock(erase[i]);
326 mtd_write(argv[1], device);
331 kill(1, 15); // send SIGTERM to init for reboot