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.
32 #include <sys/ioctl.h>
33 #include <sys/syscall.h>
39 #include <sys/ioctl.h>
40 #include <sys/types.h>
41 #include <sys/param.h>
42 #include <sys/mount.h>
44 #include <sys/reboot.h>
45 #include <linux/reboot.h>
50 #define JFFS2_DEFAULT_DIR "" /* directory name without /, empty means root dir */
53 uint32_t magic
; /* "HDR0" */
54 uint32_t len
; /* Length of file including header */
55 uint32_t crc32
; /* 32-bit CRC from flag_version to end of file */
56 uint32_t flag_version
; /* 0:15 flags, 16:31 version */
57 uint32_t offsets
[3]; /* Offsets of partitions from start of header */
60 static char *buf
= NULL
;
61 static char *imagefile
= NULL
;
62 static char *jffs2file
= NULL
, *jffs2dir
= JFFS2_DEFAULT_DIR
;
63 static int buflen
= 0;
68 int mtd_open(const char *mtd
, bool block
)
74 int flags
= O_RDWR
| O_SYNC
;
76 if ((fp
= fopen("/proc/mtd", "r"))) {
77 while (fgets(dev
, sizeof(dev
), fp
)) {
78 if (sscanf(dev
, "mtd%d:", &i
) && strstr(dev
, mtd
)) {
79 snprintf(dev
, sizeof(dev
), "/dev/mtd%s/%d", (block
? "block" : ""), i
);
80 if ((ret
=open(dev
, flags
))<0) {
81 snprintf(dev
, sizeof(dev
), "/dev/mtd%s%d", (block
? "block" : ""), i
);
91 return open(mtd
, flags
);
94 int mtd_check_open(const char *mtd
)
96 struct mtd_info_user mtdInfo
;
99 fd
= mtd_open(mtd
, false);
101 fprintf(stderr
, "Could not open mtd device: %s\n", mtd
);
105 if(ioctl(fd
, MEMGETINFO
, &mtdInfo
)) {
106 fprintf(stderr
, "Could not get MTD device info from %s\n", mtd
);
110 mtdsize
= mtdInfo
.size
;
111 erasesize
= mtdInfo
.erasesize
;
116 int mtd_erase_block(int fd
, int offset
)
118 struct erase_info_user mtdEraseInfo
;
120 mtdEraseInfo
.start
= offset
;
121 mtdEraseInfo
.length
= erasesize
;
122 ioctl(fd
, MEMUNLOCK
, &mtdEraseInfo
);
123 if (ioctl (fd
, MEMERASE
, &mtdEraseInfo
) < 0) {
124 fprintf(stderr
, "Erasing mtd failed.\n");
130 int mtd_write_buffer(int fd
, const char *buf
, int offset
, int length
)
132 lseek(fd
, offset
, SEEK_SET
);
133 write(fd
, buf
, length
);
139 image_check(int imagefd
, const char *mtd
)
143 ret
= trx_check(imagefd
, mtd
, buf
, &buflen
);
148 static int mtd_check(const char *mtd
)
152 fd
= mtd_check_open(mtd
);
157 buf
= malloc(erasesize
);
164 mtd_unlock(const char *mtd
)
167 struct erase_info_user mtdLockInfo
;
169 fd
= mtd_check_open(mtd
);
171 fprintf(stderr
, "Could not open mtd device: %s\n", mtd
);
176 fprintf(stderr
, "Unlocking %s ...\n", mtd
);
178 mtdLockInfo
.start
= 0;
179 mtdLockInfo
.length
= mtdsize
;
180 if(ioctl(fd
, MEMUNLOCK
, &mtdLockInfo
)) {
190 mtd_erase(const char *mtd
)
193 struct erase_info_user mtdEraseInfo
;
196 fprintf(stderr
, "Erasing %s ...\n", mtd
);
198 fd
= mtd_check_open(mtd
);
200 fprintf(stderr
, "Could not open mtd device: %s\n", mtd
);
204 mtdEraseInfo
.length
= erasesize
;
206 for (mtdEraseInfo
.start
= 0;
207 mtdEraseInfo
.start
< mtdsize
;
208 mtdEraseInfo
.start
+= erasesize
) {
210 ioctl(fd
, MEMUNLOCK
, &mtdEraseInfo
);
211 if(ioctl(fd
, MEMERASE
, &mtdEraseInfo
))
212 fprintf(stderr
, "Failed to erase block on %s at 0x%x\n", mtd
, mtdEraseInfo
.start
);
221 mtd_refresh(const char *mtd
)
226 fprintf(stderr
, "Refreshing mtd partition %s ... ", mtd
);
228 fd
= mtd_check_open(mtd
);
230 fprintf(stderr
, "Could not open mtd device: %s\n", mtd
);
234 if (ioctl(fd
, MTDREFRESH
, NULL
)) {
235 fprintf(stderr
, "Failed to refresh the MTD device\n");
242 fprintf(stderr
, "\n");
248 mtd_write(int imagefd
, const char *mtd
)
253 fd
= mtd_check_open(mtd
);
255 fprintf(stderr
, "Could not open mtd device: %s\n", mtd
);
260 fprintf(stderr
, "Writing from %s to %s ... ", imagefile
, mtd
);
264 fprintf(stderr
, " [ ]");
267 /* buffer may contain data already (from trx check) */
269 r
= read(imagefd
, buf
+ buflen
, erasesize
- buflen
);
271 if ((errno
== EINTR
) || (errno
== EAGAIN
))
280 fprintf(stderr
, "No more data left\n");
285 } while (buflen
< erasesize
);
291 if (memcmp(buf
, JFFS2_EOF
, sizeof(JFFS2_EOF
)) == 0) {
293 fprintf(stderr
, "\b\b\b ");
295 fprintf(stderr
, "\nAppending jffs2 data to from %s to %s...", jffs2file
, mtd
);
296 /* got an EOF marker - this is the place to add some jffs2 data */
297 mtd_replace_jffs2(mtd
, fd
, e
, jffs2file
);
300 /* no EOF marker, make sure we figure out the last inode number
301 * before appending some data */
302 mtd_parse_jffs2data(buf
, jffs2dir
);
305 /* need to erase the next block before writing data to it */
306 while (w
+ buflen
> e
) {
308 fprintf(stderr
, "\b\b\b[e]");
310 mtd_erase_block(fd
, e
);
312 /* erase the chunk */
317 fprintf(stderr
, "\b\b\b[w]");
319 if ((result
= write(fd
, buf
, buflen
)) < buflen
) {
321 fprintf(stderr
, "Error writing image.\n");
324 fprintf(stderr
, "Insufficient space.\n");
333 fprintf(stderr
, "\b\b\b\b");
337 fprintf(stderr
, "\n");
343 static void usage(void)
345 fprintf(stderr
, "Usage: mtd [<options> ...] <command> [<arguments> ...] <device>\n\n"
346 "The device is in the format of mtdX (eg: mtd4) or its label.\n"
347 "mtd recognizes these commands:\n"
348 " unlock unlock the device\n"
349 " refresh refresh mtd partition\n"
350 " erase erase all data on device\n"
351 " write <imagefile>|- write <imagefile> (use - for stdin) to device\n"
352 " jffs2write <file> append <file> to the jffs2 partition on the device\n"
353 "Following options are available:\n"
354 " -q quiet mode (once: no [w] on writing,\n"
355 " twice: no status messages)\n"
356 " -r reboot after successful command\n"
357 " -f force write without trx checks\n"
358 " -e <device> erase <device> before executing the command\n"
359 " -d <name> directory for jffs2write, defaults to \"tmp\"\n"
360 " -j <name> integrate <file> into jffs2 data when writing an image\n"
362 "Example: To write linux.trx to mtd4 labeled as linux and reboot afterwards\n"
363 " mtd -r write linux.trx linux\n\n");
367 static void do_reboot(void)
369 fprintf(stderr
, "Rebooting ...\n");
372 /* try regular reboot method first */
373 system("/sbin/reboot");
376 /* if we're still alive at this point, force the kernel to reboot */
377 syscall(SYS_reboot
,LINUX_REBOOT_MAGIC1
,LINUX_REBOOT_MAGIC2
,LINUX_REBOOT_CMD_RESTART
,NULL
);
380 int main (int argc
, char **argv
)
382 int ch
, i
, boot
, imagefd
= 0, force
, unlocked
;
383 char *erase
[MAX_ARGS
], *device
= NULL
;
398 while ((ch
= getopt(argc
, argv
, "frqe:d:j:")) != -1)
414 while ((erase
[i
] != NULL
) && ((i
+ 1) < MAX_ARGS
))
433 if ((strcmp(argv
[0], "unlock") == 0) && (argc
== 2)) {
436 } else if ((strcmp(argv
[0], "refresh") == 0) && (argc
== 2)) {
439 } else if ((strcmp(argv
[0], "erase") == 0) && (argc
== 2)) {
442 } else if ((strcmp(argv
[0], "write") == 0) && (argc
== 3)) {
446 if (strcmp(argv
[1], "-") == 0) {
447 imagefile
= "<stdin>";
451 if ((imagefd
= open(argv
[1], O_RDONLY
)) < 0) {
452 fprintf(stderr
, "Couldn't open image file: %s!\n", imagefile
);
457 if (!mtd_check(device
)) {
458 fprintf(stderr
, "Can't open device for writing!\n");
461 /* check trx file before erasing or writing anything */
462 if (!image_check(imagefd
, device
) && !force
) {
463 fprintf(stderr
, "Image check failed.\n");
466 } else if ((strcmp(argv
[0], "jffs2write") == 0) && (argc
== 3)) {
467 cmd
= CMD_JFFS2WRITE
;
471 if (!mtd_check(device
)) {
472 fprintf(stderr
, "Can't open device for writing!\n");
483 while (erase
[i
] != NULL
) {
484 mtd_unlock(erase
[i
]);
486 if (strcmp(erase
[i
], device
) == 0)
505 mtd_write(imagefd
, device
);
510 mtd_write_jffs2(device
, imagefile
, jffs2dir
);