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 */
69 image_check_brcm(int imagefd
, const char *mtd
)
71 struct trx_header
*trx
= (struct trx_header
*) buf
;
72 struct mtd_info_user mtdInfo
;
75 if (strcmp(mtd
, "linux") != 0)
78 buflen
= read(imagefd
, buf
, 32);
80 fprintf(stdout
, "Could not get image header, file too small (%ld bytes)\n", buflen
);
85 case 0x47343557: /* W54G */
86 case 0x53343557: /* W54S */
87 case 0x73343557: /* W54s */
88 case 0x46343557: /* W54F */
89 case 0x55343557: /* W54U */
90 /* ignore the first 32 bytes */
91 buflen
= read(imagefd
, buf
, sizeof(struct trx_header
));
95 if (trx
->magic
!= TRX_MAGIC
|| trx
->len
< sizeof(struct trx_header
)) {
97 fprintf(stderr
, "Bad trx header\n");
98 fprintf(stderr
, "If this is a firmware in bin format, like some of the\n"
99 "original firmware files are, you need to convert it to trx.\n");
104 /* check if image fits to mtd device */
105 fd
= mtd_open(mtd
, O_RDWR
| O_SYNC
);
107 fprintf(stderr
, "Could not open mtd device: %s\n", mtd
);
111 if(ioctl(fd
, MEMGETINFO
, &mtdInfo
)) {
112 fprintf(stderr
, "Could not get MTD device info from %s\n", mtd
);
116 if(mtdInfo
.size
< trx
->len
) {
117 fprintf(stderr
, "Image too big for partition: %s\n", mtd
);
125 #endif /* target_brcm */
128 image_check(int imagefd
, const char *mtd
)
136 return image_check_brcm(imagefd
, mtd
);
140 int mtd_check(char *mtd
)
142 struct mtd_info_user mtdInfo
;
145 fd
= mtd_open(mtd
, O_RDWR
| O_SYNC
);
147 fprintf(stderr
, "Could not open mtd device: %s\n", mtd
);
151 if(ioctl(fd
, MEMGETINFO
, &mtdInfo
)) {
152 fprintf(stderr
, "Could not get MTD device info from %s\n", mtd
);
162 mtd_unlock(const char *mtd
)
165 struct mtd_info_user mtdInfo
;
166 struct erase_info_user mtdLockInfo
;
168 fd
= mtd_open(mtd
, O_RDWR
| O_SYNC
);
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 mtdLockInfo
.start
= 0;
181 mtdLockInfo
.length
= mtdInfo
.size
;
182 if(ioctl(fd
, MEMUNLOCK
, &mtdLockInfo
)) {
192 mtd_open(const char *mtd
, int flags
)
198 if ((fp
= fopen("/proc/mtd", "r"))) {
199 while (fgets(dev
, sizeof(dev
), fp
)) {
200 if (sscanf(dev
, "mtd%d:", &i
) && strstr(dev
, mtd
)) {
201 snprintf(dev
, sizeof(dev
), "/dev/mtd/%d", i
);
203 return open(dev
, flags
);
209 return open(mtd
, flags
);
213 mtd_erase(const char *mtd
)
216 struct mtd_info_user mtdInfo
;
217 struct erase_info_user mtdEraseInfo
;
219 fd
= mtd_open(mtd
, O_RDWR
| O_SYNC
);
221 fprintf(stderr
, "Could not open mtd device: %s\n", mtd
);
225 if(ioctl(fd
, MEMGETINFO
, &mtdInfo
)) {
226 fprintf(stderr
, "Could not get MTD device info from %s\n", mtd
);
231 mtdEraseInfo
.length
= mtdInfo
.erasesize
;
233 for (mtdEraseInfo
.start
= 0;
234 mtdEraseInfo
.start
< mtdInfo
.size
;
235 mtdEraseInfo
.start
+= mtdInfo
.erasesize
) {
237 ioctl(fd
, MEMUNLOCK
, &mtdEraseInfo
);
238 if(ioctl(fd
, MEMERASE
, &mtdEraseInfo
)) {
239 fprintf(stderr
, "Could not erase MTD device: %s\n", mtd
);
251 mtd_write(int imagefd
, const char *mtd
)
255 struct mtd_info_user mtdInfo
;
256 struct erase_info_user mtdEraseInfo
;
259 fd
= mtd_open(mtd
, O_RDWR
| O_SYNC
);
261 fprintf(stderr
, "Could not open mtd device: %s\n", mtd
);
265 if(ioctl(fd
, MEMGETINFO
, &mtdInfo
)) {
266 fprintf(stderr
, "Could not get MTD device info from %s\n", mtd
);
273 fprintf(stderr
, " [ ]");
276 /* buffer may contain data already (from trx check) */
278 r
+= read(imagefd
, buf
+ buflen
, BUFSIZE
- buflen
);
284 /* need to erase the next block before writing data to it */
286 mtdEraseInfo
.start
= e
;
287 mtdEraseInfo
.length
= mtdInfo
.erasesize
;
290 fprintf(stderr
, "\b\b\b[e]");
291 /* erase the chunk */
292 if (ioctl (fd
,MEMERASE
,&mtdEraseInfo
) < 0) {
293 fprintf(stderr
, "Erasing mtd failed: %s\n", mtd
);
296 e
+= mtdInfo
.erasesize
;
300 fprintf(stderr
, "\b\b\b[w]");
302 if ((result
= write(fd
, buf
, r
)) < r
) {
304 fprintf(stderr
, "Error writing image.\n");
307 fprintf(stderr
, "Insufficient space.\n");
315 fprintf(stderr
, "\b\b\b\b");
323 fprintf(stderr
, "Usage: mtd [<options> ...] <command> [<arguments> ...] <device>\n\n"
324 "The device is in the format of mtdX (eg: mtd4) or its label.\n"
325 "mtd recognizes these commands:\n"
326 " unlock unlock the device\n"
327 " erase erase all data on device\n"
328 " write <imagefile>|- write <imagefile> (use - for stdin) to device\n"
329 "Following options are available:\n"
330 " -q quiet mode (once: no [w] on writing,\n"
331 " twice: no status messages)\n"
332 " -r reboot after successful command\n"
333 " -f force write without trx checks\n"
334 " -e <device> erase <device> before executing the command\n\n"
335 "Example: To write linux.trx to mtd4 labeled as linux and reboot afterwards\n"
336 " mtd -r write linux.trx linux\n\n");
340 int main (int argc
, char **argv
)
342 int ch
, i
, boot
, unlock
, imagefd
, force
, unlocked
;
343 char *erase
[MAX_ARGS
], *device
, *imagefile
;
356 while ((ch
= getopt(argc
, argv
, "frqe:")) != -1)
369 while ((erase
[i
] != NULL
) && ((i
+ 1) < MAX_ARGS
))
386 if ((strcmp(argv
[0], "unlock") == 0) && (argc
== 2)) {
389 } else if ((strcmp(argv
[0], "erase") == 0) && (argc
== 2)) {
392 } else if ((strcmp(argv
[0], "write") == 0) && (argc
== 3)) {
396 if (strcmp(argv
[1], "-") == 0) {
397 imagefile
= "<stdin>";
401 if ((imagefd
= open(argv
[1], O_RDONLY
)) < 0) {
402 fprintf(stderr
, "Couldn't open image file: %s!\n", imagefile
);
407 /* check trx file before erasing or writing anything */
408 if (!image_check(imagefd
, device
)) {
410 fprintf(stderr
, "Image check failed.\n");
414 if (!mtd_check(device
)) {
415 fprintf(stderr
, "Can't open device for writing!\n");
427 while (erase
[i
] != NULL
) {
429 fprintf(stderr
, "Unlocking %s ...\n", erase
[i
]);
430 mtd_unlock(erase
[i
]);
432 fprintf(stderr
, "Erasing %s ...\n", erase
[i
]);
434 if (strcmp(erase
[i
], device
) == 0)
441 fprintf(stderr
, "Unlocking %s ...\n", device
);
450 fprintf(stderr
, "Erasing %s ...\n", device
);
455 fprintf(stderr
, "Writing from %s to %s ... ", imagefile
, device
);
456 mtd_write(imagefd
, device
);
458 fprintf(stderr
, "\n");
465 kill(1, 15); // send SIGTERM to init for reboot