2 * mtd - simple memory technology device manipulation tool
4 * Copyright (C) 2005 Waldemar Brodkorb <wbx@dass-it.de>,
5 * Felix Fietkau <nbd@openwrt.org>
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 * The code is based on the linux-mtd examples.
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 (16 * 1024)
51 #define SYSTYPE_UNKNOWN 0
52 #define SYSTYPE_BROADCOM 1
56 uint32_t magic; /* "HDR0" */
57 uint32_t len; /* Length of file including header */
58 uint32_t crc32; /* 32-bit CRC from flag_version to end of file */
59 uint32_t flag_version; /* 0:15 flags, 16:31 version */
60 uint32_t offsets[3]; /* Offsets of partitions from start of header */
68 image_check_bcom(int imagefd, const char *mtd)
70 struct trx_header *trx = (struct trx_header *) buf;
71 struct mtd_info_user mtdInfo;
74 if (strcmp(mtd, "linux") != 0)
77 buflen = read(imagefd, buf, 32);
79 fprintf(stdout, "Could not get image header, file too small (%ld bytes)\n", buflen);
84 case 0x47343557: /* W54G */
85 case 0x53343557: /* W54S */
86 case 0x73343557: /* W54s */
87 case 0x46343557: /* W54F */
88 case 0x55343557: /* W54U */
89 /* ignore the first 32 bytes */
90 buflen = read(imagefd, buf, sizeof(struct trx_header));
94 if (trx->magic != TRX_MAGIC || trx->len < sizeof(struct trx_header)) {
96 fprintf(stderr, "Bad trx header\n");
97 fprintf(stderr, "If this is a firmware in bin format, like some of the\n"
98 "original firmware files are, you need to convert it to trx.\n");
103 /* check if image fits to mtd device */
104 fd = mtd_open(mtd, O_RDWR | O_SYNC);
106 fprintf(stderr, "Could not open mtd device: %s\n", mtd);
110 if(ioctl(fd, MEMGETINFO, &mtdInfo)) {
111 fprintf(stderr, "Could not get MTD device info from %s\n", mtd);
115 if(mtdInfo.size < trx->len) {
116 fprintf(stderr, "Image too big for partition: %s\n", mtd);
126 image_check(int imagefd, const char *mtd)
133 systype = SYSTYPE_UNKNOWN;
134 f = fopen("/proc/cpuinfo", "r");
135 while (!feof(f) && (fgets(buf, BUFSIZE - 1, f) != NULL)) {
136 if ((strncmp(buf, "system type", 11) == 0) && (c = strchr(buf, ':'))) {
138 if (strncmp(c, "Broadcom BCM947XX", 17) == 0)
139 systype = SYSTYPE_BROADCOM;
145 case SYSTYPE_BROADCOM:
146 return image_check_bcom(imagefd, mtd);
152 int mtd_check(char *mtd)
154 struct mtd_info_user mtdInfo;
157 fd = mtd_open(mtd, O_RDWR | O_SYNC);
159 fprintf(stderr, "Could not open mtd device: %s\n", mtd);
163 if(ioctl(fd, MEMGETINFO, &mtdInfo)) {
164 fprintf(stderr, "Could not get MTD device info from %s\n", mtd);
174 mtd_unlock(const char *mtd)
177 struct mtd_info_user mtdInfo;
178 struct erase_info_user mtdLockInfo;
180 fd = mtd_open(mtd, O_RDWR | O_SYNC);
182 fprintf(stderr, "Could not open mtd device: %s\n", mtd);
186 if(ioctl(fd, MEMGETINFO, &mtdInfo)) {
187 fprintf(stderr, "Could not get MTD device info from %s\n", mtd);
192 mtdLockInfo.start = 0;
193 mtdLockInfo.length = mtdInfo.size;
194 if(ioctl(fd, MEMUNLOCK, &mtdLockInfo)) {
204 mtd_open(const char *mtd, int flags)
210 if ((fp = fopen("/proc/mtd", "r"))) {
211 while (fgets(dev, sizeof(dev), fp)) {
212 if (sscanf(dev, "mtd%d:", &i) && strstr(dev, mtd)) {
213 snprintf(dev, sizeof(dev), "/dev/mtd/%d", i);
215 return open(dev, flags);
221 return open(mtd, flags);
225 mtd_erase(const char *mtd)
228 struct mtd_info_user mtdInfo;
229 struct erase_info_user mtdEraseInfo;
231 fd = mtd_open(mtd, O_RDWR | O_SYNC);
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.length = mtdInfo.erasesize;
245 for (mtdEraseInfo.start = 0;
246 mtdEraseInfo.start < mtdInfo.size;
247 mtdEraseInfo.start += mtdInfo.erasesize) {
249 ioctl(fd, MEMUNLOCK, &mtdEraseInfo);
250 if(ioctl(fd, MEMERASE, &mtdEraseInfo)) {
251 fprintf(stderr, "Could not erase MTD device: %s\n", mtd);
263 mtd_write(int imagefd, const char *mtd)
267 struct mtd_info_user mtdInfo;
268 struct erase_info_user mtdEraseInfo;
271 fd = mtd_open(mtd, O_RDWR | O_SYNC);
273 fprintf(stderr, "Could not open mtd device: %s\n", mtd);
277 if(ioctl(fd, MEMGETINFO, &mtdInfo)) {
278 fprintf(stderr, "Could not get MTD device info from %s\n", mtd);
285 fprintf(stderr, " [ ]");
288 /* buffer may contain data already (from trx check) */
290 r += read(imagefd, buf + buflen, BUFSIZE - buflen);
296 /* need to erase the next block before writing data to it */
298 mtdEraseInfo.start = e;
299 mtdEraseInfo.length = mtdInfo.erasesize;
302 fprintf(stderr, "\b\b\b[e]");
303 /* erase the chunk */
304 if (ioctl (fd,MEMERASE,&mtdEraseInfo) < 0) {
305 fprintf(stderr, "Erasing mtd failed: %s\n", mtd);
308 e += mtdInfo.erasesize;
312 fprintf(stderr, "\b\b\b[w]");
314 if ((result = write(fd, buf, r)) < r) {
316 fprintf(stderr, "Error writing image.\n");
319 fprintf(stderr, "Insufficient space.\n");
327 fprintf(stderr, "\b\b\b\b");
335 fprintf(stderr, "Usage: mtd [<options> ...] <command> [<arguments> ...] <device>\n\n"
336 "The device is in the format of mtdX (eg: mtd4) or its label.\n"
337 "mtd recognizes these commands:\n"
338 " unlock unlock the device\n"
339 " erase erase all data on device\n"
340 " write <imagefile>|- write <imagefile> (use - for stdin) to device\n"
341 "Following options are available:\n"
342 " -q quiet mode (once: no [w] on writing,\n"
343 " twice: no status messages)\n"
344 " -r reboot after successful command\n"
345 " -f force write without trx checks\n"
346 " -e <device> erase <device> before executing the command\n\n"
347 "Example: To write linux.trx to mtd4 labeled as linux and reboot afterwards\n"
348 " mtd -r write linux.trx linux\n\n");
352 int main (int argc, char **argv)
354 int ch, i, boot, unlock, imagefd, force, unlocked;
355 char *erase[MAX_ARGS], *device, *imagefile;
368 while ((ch = getopt(argc, argv, "frqe:")) != -1)
381 while ((erase[i] != NULL) && ((i + 1) < MAX_ARGS))
398 if ((strcmp(argv[0], "unlock") == 0) && (argc == 2)) {
401 } else if ((strcmp(argv[0], "erase") == 0) && (argc == 2)) {
404 } else if ((strcmp(argv[0], "write") == 0) && (argc == 3)) {
408 if (strcmp(argv[1], "-") == 0) {
409 imagefile = "<stdin>";
413 if ((imagefd = open(argv[1], O_RDONLY)) < 0) {
414 fprintf(stderr, "Couldn't open image file: %s!\n", imagefile);
419 /* check trx file before erasing or writing anything */
420 if (!image_check(imagefd, device)) {
422 fprintf(stderr, "Image check failed.\n");
426 if (!mtd_check(device)) {
427 fprintf(stderr, "Can't open device for writing!\n");
439 while (erase[i] != NULL) {
441 fprintf(stderr, "Unlocking %s ...\n", erase[i]);
442 mtd_unlock(erase[i]);
444 fprintf(stderr, "Erasing %s ...\n", erase[i]);
446 if (strcmp(erase[i], device) == 0)
453 fprintf(stderr, "Unlocking %s ...\n", device);
462 fprintf(stderr, "Erasing %s ...\n", device);
467 fprintf(stderr, "Writing from %s to %s ... ", imagefile, device);
468 mtd_write(imagefd, device);
470 fprintf(stderr, "\n");
477 kill(1, 15); // send SIGTERM to init for reboot