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>
46 #define TRX_MAGIC 0x30524448 /* "HDR0" */
48 #define TRX_MAX_LEN 0x3A0000
49 #define TRX_NO_HEADER 1 /* Do not write TRX header */
54 uint32_t magic; /* "HDR0" */
55 uint32_t len; /* Length of file including header */
56 uint32_t crc32; /* 32-bit CRC from flag_version to end of file */
57 uint32_t flag_version; /* 0:15 flags, 16:31 version */
58 uint32_t offsets[3]; /* Offsets of partitions from start of header */
61 #define BUFSIZE (10 * 1024)
65 mtd_unlock(const char *mtd)
68 struct mtd_info_user mtdInfo;
69 struct erase_info_user mtdLockInfo;
71 fd = mtd_open(mtd, O_RDWR);
73 fprintf(stderr, "Could not open mtd device: %s\n", mtd);
77 if(ioctl(fd, MEMGETINFO, &mtdInfo)) {
78 fprintf(stderr, "Could not get MTD device info from %s\n", mtd);
83 printf("Unlocking %s ...\n", mtd);
84 mtdLockInfo.start = 0;
85 mtdLockInfo.length = mtdInfo.size;
86 if(ioctl(fd, MEMUNLOCK, &mtdLockInfo)) {
87 fprintf(stderr, "Could not unlock MTD device: %s\n", mtd);
97 mtd_open(const char *mtd, int flags)
103 if ((fp = fopen("/proc/mtd", "r"))) {
104 while (fgets(dev, sizeof(dev), fp)) {
105 if (sscanf(dev, "mtd%d:", &i) && strstr(dev, mtd)) {
106 snprintf(dev, sizeof(dev), "/dev/mtd/%d", i);
108 return open(dev, flags);
114 return open(mtd, flags);
118 mtd_erase(const char *mtd)
121 struct mtd_info_user mtdInfo;
122 struct erase_info_user mtdEraseInfo;
124 fd = mtd_open(mtd, O_RDWR);
126 fprintf(stderr, "Could not open mtd device: %s\n", mtd);
130 if(ioctl(fd, MEMGETINFO, &mtdInfo)) {
131 fprintf(stderr, "Could not get MTD device info from %s\n", mtd);
136 printf("Erasing %s ...\n", mtd);
137 mtdEraseInfo.length = mtdInfo.erasesize;
139 for (mtdEraseInfo.start = 0;
140 mtdEraseInfo.start < mtdInfo.size;
141 mtdEraseInfo.start += mtdInfo.erasesize) {
143 ioctl(fd, MEMUNLOCK, &mtdEraseInfo);
144 if(ioctl(fd, MEMERASE, &mtdEraseInfo)) {
145 fprintf(stderr, "Could not erase MTD device: %s\n", mtd);
157 mtd_write(const char *trxfile, const char *mtd)
162 size_t result,size,written;
163 struct mtd_info_user mtdInfo;
164 struct erase_info_user mtdEraseInfo;
166 unsigned char src[BUFSIZE],dest[BUFSIZE];
168 fd = mtd_open(mtd, O_RDWR);
170 fprintf(stderr, "Could not open mtd device: %s\n", mtd);
174 if(ioctl(fd, MEMGETINFO, &mtdInfo)) {
175 fprintf(stderr, "Could not get MTD device info from %s\n", mtd);
180 trxfd = open(trxfile,O_RDONLY);
182 fprintf(stderr, "Could not open trx image: %s\n", trxfile);
186 if (fstat (trxfd,&trxstat) < 0) {
187 fprintf(stderr, "Could not get trx image file status: %s\n", trxfile);
192 if(mtdInfo.size < trxstat.st_size) {
193 fprintf(stderr, "Image too big for partition: %s\n", mtd);
198 printf("Writing %s to %s ...\n", trxfile, mtd);
200 mtdEraseInfo.start = 0;
201 mtdEraseInfo.length = trxstat.st_size & ~(mtdInfo.erasesize -1);
202 if(trxstat.st_size % mtdInfo.erasesize) mtdEraseInfo.length += mtdInfo.erasesize;
204 /* erase the chunk */
205 if (ioctl (fd,MEMERASE,&mtdEraseInfo) < 0) {
206 fprintf(stderr, "Erasing mtd failed: %s\n", mtd);
210 size = trxstat.st_size;
215 if (size < BUFSIZE) i = size;
217 result = write(fd,src,i);
220 fprintf(stderr,"Error while writing image");
223 fprintf(stderr,"Error writing image");
235 printf("Usage: mtd [<options> ...] <command> [<arguments> ...] <device>\n\n"
236 "The device is in the format of mtdX (eg: mtd4) or its label.\n"
237 "mtd recognizes these commands:\n"
238 " unlock unlock the device\n"
239 " erase erase all data on device\n"
240 " write <imagefile> write imagefile to device\n"
241 "Following options are available:\n"
242 " -r reboot after successful command\n"
243 " -e <device> erase <device> before executing the command\n\n"
244 "Example: To write linux.trx to mtd4 labeled as linux and reboot afterwards\n"
245 " mtd -r write linux.trx linux\n\n");
249 int main (int argc, char **argv)
251 int ch, i, boot, unlock;
252 char *erase[MAX_ARGS], *device;
262 while ((ch = getopt(argc, argv, "re:")) != -1)
269 while ((erase[i] != NULL) && ((i + 1) < MAX_ARGS))
286 if ((strcmp(argv[0], "unlock") == 0) && (argc == 2)) {
289 } else if ((strcmp(argv[0], "erase") == 0) && (argc == 2)) {
292 } else if ((strcmp(argv[0], "write") == 0) && (argc == 3)) {
302 while (erase[i] != NULL) {
303 mtd_unlock(erase[i]);
317 mtd_write(argv[1], device);
322 kill(1, 15); // send SIGTERM to init for reboot