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.
31 #include <sys/ioctl.h>
32 #include <sys/syscall.h>
38 #include <sys/ioctl.h>
39 #include <sys/types.h>
40 #include <sys/param.h>
41 #include <sys/mount.h>
43 #include <sys/reboot.h>
44 #include <linux/reboot.h>
48 #define TRX_MAGIC 0x30524448 /* "HDR0" */
49 #define BUFSIZE (16 * 1024)
54 #define SYSTYPE_UNKNOWN 0
55 #define SYSTYPE_BROADCOM 1
59 uint32_t magic; /* "HDR0" */
60 uint32_t len; /* Length of file including header */
61 uint32_t crc32; /* 32-bit CRC from flag_version to end of file */
62 uint32_t flag_version; /* 0:15 flags, 16:31 version */
63 uint32_t offsets[3]; /* Offsets of partitions from start of header */
72 image_check_brcm(int imagefd, const char *mtd)
74 struct trx_header *trx = (struct trx_header *) buf;
75 struct mtd_info_user mtdInfo;
78 if (strcmp(mtd, "linux") != 0)
81 buflen = read(imagefd, buf, 32);
83 fprintf(stdout, "Could not get image header, file too small (%ld bytes)\n", buflen);
87 if (trx->magic != TRX_MAGIC || trx->len < sizeof(struct trx_header)) {
89 fprintf(stderr, "Bad trx header\n");
90 fprintf(stderr, "This is not the correct file format; refusing to flash.\n"
91 "Please specify the correct file or use -f to force.\n");
96 /* check if image fits to mtd device */
97 fd = mtd_open(mtd, O_RDWR | O_SYNC);
99 fprintf(stderr, "Could not open mtd device: %s\n", mtd);
103 if(ioctl(fd, MEMGETINFO, &mtdInfo)) {
104 fprintf(stderr, "Could not get MTD device info from %s\n", mtd);
108 if(mtdInfo.size < trx->len) {
109 fprintf(stderr, "Image too big for partition: %s\n", mtd);
117 #endif /* target_brcm */
120 image_check(int imagefd, const char *mtd)
128 return image_check_brcm(imagefd, mtd);
132 int mtd_check(char *mtd)
134 struct mtd_info_user mtdInfo;
137 fd = mtd_open(mtd, O_RDWR | O_SYNC);
139 fprintf(stderr, "Could not open mtd device: %s\n", mtd);
143 if(ioctl(fd, MEMGETINFO, &mtdInfo)) {
144 fprintf(stderr, "Could not get MTD device info from %s\n", mtd);
154 mtd_unlock(const char *mtd)
157 struct mtd_info_user mtdInfo;
158 struct erase_info_user mtdLockInfo;
160 fd = mtd_open(mtd, O_RDWR | O_SYNC);
162 fprintf(stderr, "Could not open mtd device: %s\n", mtd);
166 if(ioctl(fd, MEMGETINFO, &mtdInfo)) {
167 fprintf(stderr, "Could not get MTD device info from %s\n", mtd);
172 mtdLockInfo.start = 0;
173 mtdLockInfo.length = mtdInfo.size;
174 if(ioctl(fd, MEMUNLOCK, &mtdLockInfo)) {
184 mtd_open(const char *mtd, int flags)
191 if ((fp = fopen("/proc/mtd", "r"))) {
192 while (fgets(dev, sizeof(dev), fp)) {
193 if (sscanf(dev, "mtd%d:", &i) && strstr(dev, mtd)) {
194 snprintf(dev, sizeof(dev), "/dev/mtd/%d", i);
195 if ((ret=open(dev, flags))<0) {
196 snprintf(dev, sizeof(dev), "/dev/mtd%d", i);
197 ret=open(dev, flags);
206 return open(mtd, flags);
210 mtd_erase(const char *mtd)
213 struct mtd_info_user mtdInfo;
214 struct erase_info_user mtdEraseInfo;
216 fd = mtd_open(mtd, O_RDWR | O_SYNC);
218 fprintf(stderr, "Could not open mtd device: %s\n", mtd);
222 if(ioctl(fd, MEMGETINFO, &mtdInfo)) {
223 fprintf(stderr, "Could not get MTD device info from %s\n", mtd);
228 mtdEraseInfo.length = mtdInfo.erasesize;
230 for (mtdEraseInfo.start = 0;
231 mtdEraseInfo.start < mtdInfo.size;
232 mtdEraseInfo.start += mtdInfo.erasesize) {
234 ioctl(fd, MEMUNLOCK, &mtdEraseInfo);
235 if(ioctl(fd, MEMERASE, &mtdEraseInfo))
236 fprintf(stderr, "Failed to erase block on %s at 0x%x\n", mtd, mtdEraseInfo.start);
245 mtd_write(int imagefd, const char *mtd)
249 struct mtd_info_user mtdInfo;
250 struct erase_info_user mtdEraseInfo;
253 fd = mtd_open(mtd, O_RDWR | O_SYNC);
255 fprintf(stderr, "Could not open mtd device: %s\n", mtd);
259 if(ioctl(fd, MEMGETINFO, &mtdInfo)) {
260 fprintf(stderr, "Could not get MTD device info from %s\n", mtd);
267 fprintf(stderr, " [ ]");
270 /* buffer may contain data already (from trx check) */
272 r += read(imagefd, buf + buflen, BUFSIZE - buflen);
278 /* need to erase the next block before writing data to it */
280 mtdEraseInfo.start = e;
281 mtdEraseInfo.length = mtdInfo.erasesize;
284 fprintf(stderr, "\b\b\b[e]");
285 /* erase the chunk */
286 if (ioctl (fd,MEMERASE,&mtdEraseInfo) < 0) {
287 fprintf(stderr, "Erasing mtd failed: %s\n", mtd);
290 e += mtdInfo.erasesize;
294 fprintf(stderr, "\b\b\b[w]");
296 if ((result = write(fd, buf, r)) < r) {
298 fprintf(stderr, "Error writing image.\n");
301 fprintf(stderr, "Insufficient space.\n");
309 fprintf(stderr, "\b\b\b\b");
317 fprintf(stderr, "Usage: mtd [<options> ...] <command> [<arguments> ...] <device>\n\n"
318 "The device is in the format of mtdX (eg: mtd4) or its label.\n"
319 "mtd recognizes these commands:\n"
320 " unlock unlock the device\n"
321 " erase erase all data on device\n"
322 " write <imagefile>|- write <imagefile> (use - for stdin) to device\n"
323 "Following options are available:\n"
324 " -q quiet mode (once: no [w] on writing,\n"
325 " twice: no status messages)\n"
326 " -r reboot after successful command\n"
327 " -f force write without trx checks\n"
328 " -e <device> erase <device> before executing the command\n\n"
329 "Example: To write linux.trx to mtd4 labeled as linux and reboot afterwards\n"
330 " mtd -r write linux.trx linux\n\n");
334 int main (int argc, char **argv)
336 int ch, i, boot, unlock, imagefd, force, unlocked;
337 char *erase[MAX_ARGS], *device, *imagefile;
350 while ((ch = getopt(argc, argv, "frqe:")) != -1)
363 while ((erase[i] != NULL) && ((i + 1) < MAX_ARGS))
380 if ((strcmp(argv[0], "unlock") == 0) && (argc == 2)) {
383 } else if ((strcmp(argv[0], "erase") == 0) && (argc == 2)) {
386 } else if ((strcmp(argv[0], "write") == 0) && (argc == 3)) {
390 if (strcmp(argv[1], "-") == 0) {
391 imagefile = "<stdin>";
395 if ((imagefd = open(argv[1], O_RDONLY)) < 0) {
396 fprintf(stderr, "Couldn't open image file: %s!\n", imagefile);
401 /* check trx file before erasing or writing anything */
402 if (!image_check(imagefd, device)) {
404 fprintf(stderr, "Image check failed.\n");
408 if (!mtd_check(device)) {
409 fprintf(stderr, "Can't open device for writing!\n");
421 while (erase[i] != NULL) {
423 fprintf(stderr, "Unlocking %s ...\n", erase[i]);
424 mtd_unlock(erase[i]);
426 fprintf(stderr, "Erasing %s ...\n", erase[i]);
428 if (strcmp(erase[i], device) == 0)
435 fprintf(stderr, "Unlocking %s ...\n", device);
444 fprintf(stderr, "Erasing %s ...\n", device);
449 fprintf(stderr, "Writing from %s to %s ... ", imagefile, device);
450 mtd_write(imagefd, device);
452 fprintf(stderr, "\n");
460 syscall(SYS_reboot,LINUX_REBOOT_MAGIC1,LINUX_REBOOT_MAGIC2,LINUX_REBOOT_CMD_RESTART,NULL);