summaryrefslogtreecommitdiff
path: root/package/mtd/src/mtd.c
blob: 92018c23cff78fe5625fc9998fc2d49644bdf1d7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
/*
 * mtd - simple memory technology device manipulation tool
 *
 * Copyright (C) 2005 Waldemar Brodkorb <wbx@dass-it.de>,
 *	                  Felix Fietkau <nbd@openwrt.org>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 * $Id$
 *
 * The code is based on the linux-mtd examples.
 */

#include <limits.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <stdint.h>
#include <signal.h>
#include <sys/ioctl.h>
#include <sys/syscall.h>
#include <fcntl.h>
#include <errno.h>
#include <error.h>
#include <time.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/param.h>
#include <sys/mount.h>
#include <sys/stat.h>
#include <sys/reboot.h>
#include <linux/reboot.h>

#include "mtd-api.h"

#define TRX_MAGIC       0x30524448      /* "HDR0" */
#define BUFSIZE (16 * 1024)
#define MAX_ARGS 8

#define DEBUG

#define JFFS2_DEFAULT_DIR	"tmp"

#define SYSTYPE_UNKNOWN     0
#define SYSTYPE_BROADCOM    1
/* to be continued */

struct trx_header {
	uint32_t magic;		/* "HDR0" */
	uint32_t len;		/* Length of file including header */
	uint32_t crc32;		/* 32-bit CRC from flag_version to end of file */
	uint32_t flag_version;	/* 0:15 flags, 16:31 version */
	uint32_t offsets[3];    /* Offsets of partitions from start of header */
};

static char buf[BUFSIZE];
static char *imagefile;
static int buflen;
int quiet;
int mtdsize = 0;
int erasesize = 0;

int mtd_open(const char *mtd)
{
	FILE *fp;
	char dev[PATH_MAX];
	int i;
	int ret;
	int flags = O_RDWR | O_SYNC;

	if ((fp = fopen("/proc/mtd", "r"))) {
		while (fgets(dev, sizeof(dev), fp)) {
			if (sscanf(dev, "mtd%d:", &i) && strstr(dev, mtd)) {
				snprintf(dev, sizeof(dev), "/dev/mtd/%d", i);
				if ((ret=open(dev, flags))<0) {
					snprintf(dev, sizeof(dev), "/dev/mtd%d", i);
					ret=open(dev, flags);
				}
				fclose(fp);
				return ret;
			}
		}
		fclose(fp);
	}

	return open(mtd, flags);
}

int mtd_check_open(const char *mtd)
{
	struct mtd_info_user mtdInfo;
	int fd;

	fd = mtd_open(mtd);
	if(fd < 0) {
		fprintf(stderr, "Could not open mtd device: %s\n", mtd);
		return 0;
	}

	if(ioctl(fd, MEMGETINFO, &mtdInfo)) {
		fprintf(stderr, "Could not get MTD device info from %s\n", mtd);
		close(fd);
		return 0;
	}
	mtdsize = mtdInfo.size;
	erasesize = mtdInfo.erasesize;

	return fd;
}

int mtd_erase_block(int fd, int offset)
{
	struct erase_info_user mtdEraseInfo;

	mtdEraseInfo.start = offset;
	mtdEraseInfo.length = erasesize;
	ioctl(fd, MEMUNLOCK, &mtdEraseInfo);
	if (ioctl (fd, MEMERASE, &mtdEraseInfo) < 0) {
		fprintf(stderr, "Erasing mtd failed.\n");
		exit(1);
	}
}

int mtd_write_buffer(int fd, char *buf, int offset, int length)
{
	lseek(fd, offset, SEEK_SET);
	write(fd, buf, length);
}


#ifdef target_brcm
static int
image_check_brcm(int imagefd, const char *mtd)
{
	struct trx_header *trx = (struct trx_header *) buf;
	int fd;

	if (strcmp(mtd, "linux") != 0)
		return 1;
	
	buflen = read(imagefd, buf, 32);
	if (buflen < 32) {
		fprintf(stdout, "Could not get image header, file too small (%ld bytes)\n", buflen);
		return 0;
	}

	if (trx->magic != TRX_MAGIC || trx->len < sizeof(struct trx_header)) {
		if (quiet < 2) {
			fprintf(stderr, "Bad trx header\n");
			fprintf(stderr, "This is not the correct file format; refusing to flash.\n"
					"Please specify the correct file or use -f to force.\n");
		}
		return 0;
	}

	/* check if image fits to mtd device */
	fd = mtd_check_open(mtd);
	if(fd < 0) {
		fprintf(stderr, "Could not open mtd device: %s\n", mtd);
		exit(1);
	}

	if(mtdsize < trx->len) {
		fprintf(stderr, "Image too big for partition: %s\n", mtd);
		close(fd);
		return 0;
	}	
	
	close(fd);
	return 1;
}
#endif /* target_brcm */

static int
image_check(int imagefd, const char *mtd)
{
	int fd, systype;
	size_t count;
	char *c;
	FILE *f;

#ifdef target_brcm
	return image_check_brcm(imagefd, mtd);
#endif
}

static int mtd_check(const char *mtd)
{
	int fd;

	fd = mtd_check_open(mtd);
	if (!fd)
		return 0;

	close(fd);
	return 1;
}

static int
mtd_unlock(const char *mtd)
{
	int fd;
	struct erase_info_user mtdLockInfo;

	fd = mtd_check_open(mtd);
	if(fd <= 0) {
		fprintf(stderr, "Could not open mtd device: %s\n", mtd);
		exit(1);
	}

	if (quiet < 2) 
		fprintf(stderr, "Unlocking %s ...\n", mtd);

	mtdLockInfo.start = 0;
	mtdLockInfo.length = mtdsize;
	if(ioctl(fd, MEMUNLOCK, &mtdLockInfo)) {
		close(fd);
		return 0;
	}
		
	close(fd);
	return 0;
}

static int
mtd_erase(const char *mtd)
{
	int fd;
	struct erase_info_user mtdEraseInfo;

	if (quiet < 2)
		fprintf(stderr, "Erasing %s ...\n", mtd);

	fd = mtd_check_open(mtd);
	if(fd <= 0) {
		fprintf(stderr, "Could not open mtd device: %s\n", mtd);
		exit(1);
	}

	mtdEraseInfo.length = erasesize;

	for (mtdEraseInfo.start = 0;
		 mtdEraseInfo.start < mtdsize;
		 mtdEraseInfo.start += erasesize) {
		
		ioctl(fd, MEMUNLOCK, &mtdEraseInfo);
		if(ioctl(fd, MEMERASE, &mtdEraseInfo))
			fprintf(stderr, "Failed to erase block on %s at 0x%x\n", mtd, mtdEraseInfo.start);
	}		

	close(fd);
	return 0;

}

static int
mtd_refresh(const char *mtd)
{
	int fd;

	if (quiet < 2)
		fprintf(stderr, "Refreshing mtd partition %s ... ", mtd);

	fd = mtd_check_open(mtd);
	if(fd <= 0) {
		fprintf(stderr, "Could not open mtd device: %s\n", mtd);
		exit(1);
	}

	if (ioctl(fd, MTDREFRESH, NULL)) {
		fprintf(stderr, "Failed to refresh the MTD device\n");
		close(fd);
		exit(1);
	}
	close(fd);

	if (quiet < 2)
		fprintf(stderr, "\n");

	return 0;
}

static int
mtd_write(int imagefd, const char *mtd)
{
	int fd, i, result;
	size_t r, w, e;
	struct erase_info_user mtdEraseInfo;
	int ret = 0;

	fd = mtd_check_open(mtd);
	if(fd < 0) {
		fprintf(stderr, "Could not open mtd device: %s\n", mtd);
		exit(1);
	}
		
	if (quiet < 2)
		fprintf(stderr, "Writing from %s to %s ... ", imagefile, mtd);

	r = w = e = 0;
	if (!quiet)
		fprintf(stderr, " [ ]");

	for (;;) {
		/* buffer may contain data already (from trx check) */
		r = buflen;
		r += read(imagefd, buf + buflen, BUFSIZE - buflen);
		w += r;

		/* EOF */
		if (r <= 0) break;

		/* need to erase the next block before writing data to it */
		while (w > e) {
			if (!quiet)
				fprintf(stderr, "\b\b\b[e]");

			mtd_erase_block(fd, e);

			/* erase the chunk */
			e += erasesize;
		}
		
		if (!quiet)
			fprintf(stderr, "\b\b\b[w]");
		
		if ((result = write(fd, buf, r)) < r) {
			if (result < 0) {
				fprintf(stderr, "Error writing image.\n");
				exit(1);
			} else {
				fprintf(stderr, "Insufficient space.\n");
				exit(1);
			}
		}
		
		buflen = 0;
	}
	if (!quiet)
		fprintf(stderr, "\b\b\b\b");

	if (quiet < 2)
		fprintf(stderr, "\n");

	close(fd);
	return 0;
}

static void usage(void)
{
	fprintf(stderr, "Usage: mtd [<options> ...] <command> [<arguments> ...] <device>\n\n"
	"The device is in the format of mtdX (eg: mtd4) or its label.\n"
	"mtd recognizes these commands:\n"
	"        unlock                  unlock the device\n"
	"        refresh                 refresh mtd partition\n"
	"        erase                   erase all data on device\n"
	"        write <imagefile>|-     write <imagefile> (use - for stdin) to device\n"
	"        jffs2write <file>       append <file> to the jffs2 partition on the device\n"
	"Following options are available:\n"
	"        -q                      quiet mode (once: no [w] on writing,\n"
	"                                           twice: no status messages)\n"
	"        -r                      reboot after successful command\n"
	"        -f                      force write without trx checks\n"
	"        -e <device>             erase <device> before executing the command\n"
	"        -d <name>               directory for jffs2write, defaults to \"tmp\"\n"
	"\n"
	"Example: To write linux.trx to mtd4 labeled as linux and reboot afterwards\n"
	"         mtd -r write linux.trx linux\n\n");
	exit(1);
}

static void do_reboot(void)
{
	fprintf(stderr, "Rebooting ...\n");
	fflush(stderr);

	/* try regular reboot method first */
	system("/sbin/reboot");
	sleep(2);

	/* if we're still alive at this point, force the kernel to reboot */
	syscall(SYS_reboot,LINUX_REBOOT_MAGIC1,LINUX_REBOOT_MAGIC2,LINUX_REBOOT_CMD_RESTART,NULL);
}

int main (int argc, char **argv)
{
	int ch, i, boot, unlock, imagefd, force, unlocked;
	char *erase[MAX_ARGS], *device;
	char *jffs2dir = JFFS2_DEFAULT_DIR;
	enum {
		CMD_ERASE,
		CMD_WRITE,
		CMD_UNLOCK,
		CMD_REFRESH,
		CMD_JFFS2WRITE
	} cmd;
	
	erase[0] = NULL;
	boot = 0;
	force = 0;
	buflen = 0;
	quiet = 0;

	while ((ch = getopt(argc, argv, "frqe:d:")) != -1)
		switch (ch) {
			case 'f':
				force = 1;
				break;
			case 'r':
				boot = 1;
				break;
			case 'q':
				quiet++;
				break;
			case 'e':
				i = 0;
				while ((erase[i] != NULL) && ((i + 1) < MAX_ARGS))
					i++;
					
				erase[i++] = optarg;
				erase[i] = NULL;
				break;
			case 'd':
				jffs2dir = optarg;
				break;
			case '?':
			default:
				usage();
		}
	argc -= optind;
	argv += optind;
	
	if (argc < 2)
		usage();

	if ((strcmp(argv[0], "unlock") == 0) && (argc == 2)) {
		cmd = CMD_UNLOCK;
		device = argv[1];
	} else if ((strcmp(argv[0], "refresh") == 0) && (argc == 2)) {
		cmd = CMD_REFRESH;
		device = argv[1];
	} else if ((strcmp(argv[0], "erase") == 0) && (argc == 2)) {
		cmd = CMD_ERASE;
		device = argv[1];
	} else if ((strcmp(argv[0], "write") == 0) && (argc == 3)) {
		cmd = CMD_WRITE;
		device = argv[2];
	
		if (strcmp(argv[1], "-") == 0) {
			imagefile = "<stdin>";
			imagefd = 0;
		} else {
			imagefile = argv[1];
			if ((imagefd = open(argv[1], O_RDONLY)) < 0) {
				fprintf(stderr, "Couldn't open image file: %s!\n", imagefile);
				exit(1);
			}
		}
	
		/* check trx file before erasing or writing anything */
		if (!image_check(imagefd, device)) {
			if (!force) {
				fprintf(stderr, "Image check failed.\n");
				exit(1);
			}
		} else {
			if (!mtd_check(device)) {
				fprintf(stderr, "Can't open device for writing!\n");
				exit(1);
			}
		}
	} else if ((strcmp(argv[0], "jffs2write") == 0) && (argc == 3)) {
		cmd = CMD_JFFS2WRITE;
		device = argv[2];
	
		imagefile = argv[1];
		if (!mtd_check(device)) {
			fprintf(stderr, "Can't open device for writing!\n");
			exit(1);
		}
	} else {
		usage();
	}

	sync();
	
	i = 0;
	unlocked = 0;
	while (erase[i] != NULL) {
		mtd_unlock(erase[i]);
		mtd_erase(erase[i]);
		if (strcmp(erase[i], device) == 0)
			unlocked = 1;
		i++;
	}
	
		
	switch (cmd) {
		case CMD_UNLOCK:
			if (!unlocked)
				mtd_unlock(device);
			break;
		case CMD_ERASE:
			if (!unlocked)
				mtd_unlock(device);
			mtd_erase(device);
			break;
		case CMD_WRITE:
			if (!unlocked)
				mtd_unlock(device);
			mtd_write(imagefd, device);
			break;
		case CMD_JFFS2WRITE:
			if (!unlocked)
				mtd_unlock(device);
			mtd_write_jffs2(device, imagefile, jffs2dir);
			break;
		case CMD_REFRESH:
			mtd_refresh(device);
			break;
	}

	sync();
	
	if (boot)
		do_reboot();

	return 0;
}