aboutsummaryrefslogtreecommitdiff
path: root/misc-utils/flashcp.c
blob: c46a5b45ea5c913b70a7b4e53aac52d217e0910d (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
/*
 * Copyright (c) 2d3D, Inc.
 * Written by Abraham vd Merwe <abraham@2d3d.co.za>
 * All rights reserved.
 *
 * Renamed to flashcp.c to avoid conflicts with fcp from fsh package
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *	  notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *	  notice, this list of conditions and the following disclaimer in the
 *	  documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the author nor the names of other contributors
 *	  may be used to endorse or promote products derived from this software
 *	  without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#define PROGRAM_NAME "flashcp"

#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <unistd.h>
#include <mtd/mtd-user.h>
#include <getopt.h>

#include "common.h"

/* for debugging purposes only */
#ifdef DEBUG
#undef DEBUG
#define DEBUG(fmt,args...) { log_printf (LOG_ERROR,"%d: ",__LINE__); log_printf (LOG_ERROR,fmt,## args); }
#else
#undef DEBUG
#define DEBUG(fmt,args...)
#endif

#define KB(x) ((x) / 1024)
#define PERCENTAGE(x,total) (((x) * 100) / (total))

/* size of read/write buffer */
#define BUFSIZE (10 * 1024)

/* cmd-line flags */
#define FLAG_NONE		0x00
#define FLAG_VERBOSE	0x01
#define FLAG_HELP		0x02
#define FLAG_FILENAME	0x04
#define FLAG_DEVICE		0x08

/* error levels */
#define LOG_NORMAL	1
#define LOG_ERROR	2

static void log_printf (int level,const char *fmt, ...)
{
	FILE *fp = level == LOG_NORMAL ? stdout : stderr;
	va_list ap;
	va_start (ap,fmt);
	vfprintf (fp,fmt,ap);
	va_end (ap);
	fflush (fp);
}

static NORETURN void showusage(bool error)
{
	int level = error ? LOG_ERROR : LOG_NORMAL;

	log_printf (level,
			"\n"
			"Flash Copy - Written by Abraham van der Merwe <abraham@2d3d.co.za>\n"
			"\n"
			"usage: %1$s [ -v | --verbose ] <filename> <device>\n"
			"       %1$s -h | --help\n"
			"       %1$s -V | --version\n"
			"\n"
			"   -h | --help      Show this help message\n"
			"   -v | --verbose   Show progress reports\n"
			"   -V | --version   Show version information and exit\n"
			"   <filename>       File which you want to copy to flash\n"
			"   <device>         Flash device to write to (e.g. /dev/mtd0, /dev/mtd1, etc.)\n"
			"\n",
			PROGRAM_NAME);

	exit (error ? EXIT_FAILURE : EXIT_SUCCESS);
}

static int safe_open (const char *pathname,int flags)
{
	int fd;

	fd = open (pathname,flags);
	if (fd < 0)
	{
		log_printf (LOG_ERROR,"While trying to open %s",pathname);
		if (flags & O_RDWR)
			log_printf (LOG_ERROR," for read/write access");
		else if (flags & O_RDONLY)
			log_printf (LOG_ERROR," for read access");
		else if (flags & O_WRONLY)
			log_printf (LOG_ERROR," for write access");
		log_printf (LOG_ERROR,": %m\n");
		exit (EXIT_FAILURE);
	}

	return (fd);
}

static void safe_read (int fd,const char *filename,void *buf,size_t count,bool verbose)
{
	ssize_t result;

	result = read (fd,buf,count);
	if (count != result)
	{
		if (verbose) log_printf (LOG_NORMAL,"\n");
		if (result < 0)
		{
			log_printf (LOG_ERROR,"While reading data from %s: %m\n",filename);
			exit (EXIT_FAILURE);
		}
		log_printf (LOG_ERROR,"Short read count returned while reading from %s\n",filename);
		exit (EXIT_FAILURE);
	}
}

static void safe_rewind (int fd,const char *filename)
{
	if (lseek (fd,0L,SEEK_SET) < 0)
	{
		log_printf (LOG_ERROR,"While seeking to start of %s: %m\n",filename);
		exit (EXIT_FAILURE);
	}
}

/******************************************************************************/

static int dev_fd = -1,fil_fd = -1;

static void cleanup (void)
{
	if (dev_fd > 0) close (dev_fd);
	if (fil_fd > 0) close (fil_fd);
}

int main (int argc,char *argv[])
{
	const char *filename = NULL,*device = NULL;
	int i,flags = FLAG_NONE;
	ssize_t result;
	size_t size,written;
	struct mtd_info_user mtd;
	struct erase_info_user erase;
	struct stat filestat;
	unsigned char src[BUFSIZE],dest[BUFSIZE];

	/*********************
	 * parse cmd-line
	 *****************/

	for (;;) {
		int option_index = 0;
		static const char *short_options = "hvV";
		static const struct option long_options[] = {
			{"help", no_argument, 0, 'h'},
			{"verbose", no_argument, 0, 'v'},
			{"version", no_argument, 0, 'V'},
			{0, 0, 0, 0},
		};

		int c = getopt_long(argc, argv, short_options,
				long_options, &option_index);
		if (c == EOF) {
			break;
		}

		switch (c) {
			case 'h':
				flags |= FLAG_HELP;
				DEBUG("Got FLAG_HELP\n");
				break;
			case 'v':
				flags |= FLAG_VERBOSE;
				DEBUG("Got FLAG_VERBOSE\n");
				break;
			case 'V':
				common_print_version();
				exit(EXIT_SUCCESS);
				break;
			default:
				DEBUG("Unknown parameter: %s\n",argv[option_index]);
				showusage(true);
		}
	}
	if (optind+2 == argc) {
		flags |= FLAG_FILENAME;
		filename = argv[optind];
		DEBUG("Got filename: %s\n",filename);

		flags |= FLAG_DEVICE;
		device = argv[optind+1];
		DEBUG("Got device: %s\n",device);
	}

	if (flags & FLAG_HELP || device == NULL)
		showusage(flags != FLAG_HELP);

	atexit (cleanup);

	/* get some info about the flash device */
	dev_fd = safe_open (device,O_SYNC | O_RDWR);
	if (ioctl (dev_fd,MEMGETINFO,&mtd) < 0)
	{
		DEBUG("ioctl(): %m\n");
		log_printf (LOG_ERROR,"This doesn't seem to be a valid MTD flash device!\n");
		exit (EXIT_FAILURE);
	}

	/* get some info about the file we want to copy */
	fil_fd = safe_open (filename,O_RDONLY);
	if (fstat (fil_fd,&filestat) < 0)
	{
		log_printf (LOG_ERROR,"While trying to get the file status of %s: %m\n",filename);
		exit (EXIT_FAILURE);
	}

	/* does it fit into the device/partition? */
	if (filestat.st_size > mtd.size)
	{
		log_printf (LOG_ERROR,"%s won't fit into %s!\n",filename,device);
		exit (EXIT_FAILURE);
	}

	/*****************************************************
	 * erase enough blocks so that we can write the file *
	 *****************************************************/

#warning "Check for smaller erase regions"

	erase.start = 0;
	erase.length = (filestat.st_size + mtd.erasesize - 1) / mtd.erasesize;
	erase.length *= mtd.erasesize;

	if (flags & FLAG_VERBOSE)
	{
		/* if the user wants verbose output, erase 1 block at a time and show him/her what's going on */
		int blocks = erase.length / mtd.erasesize;
		erase.length = mtd.erasesize;
		log_printf (LOG_NORMAL,"Erasing blocks: 0/%d (0%%)",blocks);
		for (i = 1; i <= blocks; i++)
		{
			log_printf (LOG_NORMAL,"\rErasing blocks: %d/%d (%d%%)",i,blocks,PERCENTAGE (i,blocks));
			if (ioctl (dev_fd,MEMERASE,&erase) < 0)
			{
				log_printf (LOG_NORMAL,"\n");
				log_printf (LOG_ERROR,
						"While erasing blocks 0x%.8x-0x%.8x on %s: %m\n",
						(unsigned int) erase.start,(unsigned int) (erase.start + erase.length),device);
				exit (EXIT_FAILURE);
			}
			erase.start += mtd.erasesize;
		}
		log_printf (LOG_NORMAL,"\rErasing blocks: %d/%d (100%%)\n",blocks,blocks);
	}
	else
	{
		/* if not, erase the whole chunk in one shot */
		if (ioctl (dev_fd,MEMERASE,&erase) < 0)
		{
			log_printf (LOG_ERROR,
					"While erasing blocks from 0x%.8x-0x%.8x on %s: %m\n",
					(unsigned int) erase.start,(unsigned int) (erase.start + erase.length),device);
			exit (EXIT_FAILURE);
		}
	}
	DEBUG("Erased %u / %luk bytes\n",erase.length,filestat.st_size);

	/**********************************
	 * write the entire file to flash *
	 **********************************/

	if (flags & FLAG_VERBOSE) log_printf (LOG_NORMAL,"Writing data: 0k/%lluk (0%%)",KB ((unsigned long long)filestat.st_size));
	size = filestat.st_size;
	i = BUFSIZE;
	written = 0;
	while (size)
	{
		if (size < BUFSIZE) i = size;
		if (flags & FLAG_VERBOSE)
			log_printf (LOG_NORMAL,"\rWriting data: %dk/%lluk (%llu%%)",
					KB (written + i),
					KB ((unsigned long long)filestat.st_size),
					PERCENTAGE (written + i,(unsigned long long)filestat.st_size));

		/* read from filename */
		safe_read (fil_fd,filename,src,i,flags & FLAG_VERBOSE);

		/* write to device */
		result = write (dev_fd,src,i);
		if (i != result)
		{
			if (flags & FLAG_VERBOSE) log_printf (LOG_NORMAL,"\n");
			if (result < 0)
			{
				log_printf (LOG_ERROR,
						"While writing data to 0x%.8x-0x%.8x on %s: %m\n",
						written,written + i,device);
				exit (EXIT_FAILURE);
			}
			log_printf (LOG_ERROR,
					"Short write count returned while writing to x%.8x-0x%.8x on %s: %d/%llu bytes written to flash\n",
					written,written + i,device,written + result,(unsigned long long)filestat.st_size);
			exit (EXIT_FAILURE);
		}

		written += i;
		size -= i;
	}
	if (flags & FLAG_VERBOSE)
		log_printf (LOG_NORMAL,
				"\rWriting data: %lluk/%lluk (100%%)\n",
				KB ((unsigned long long)filestat.st_size),
				KB ((unsigned long long)filestat.st_size));
	DEBUG("Wrote %d / %lluk bytes\n",written,(unsigned long long)filestat.st_size);

	/**********************************
	 * verify that flash == file data *
	 **********************************/

	safe_rewind (fil_fd,filename);
	safe_rewind (dev_fd,device);
	size = filestat.st_size;
	i = BUFSIZE;
	written = 0;
	if (flags & FLAG_VERBOSE) log_printf (LOG_NORMAL,"Verifying data: 0k/%lluk (0%%)",KB ((unsigned long long)filestat.st_size));
	while (size)
	{
		if (size < BUFSIZE) i = size;
		if (flags & FLAG_VERBOSE)
			log_printf (LOG_NORMAL,
					"\rVerifying data: %dk/%lluk (%llu%%)",
					KB (written + i),
					KB ((unsigned long long)filestat.st_size),
					PERCENTAGE (written + i,(unsigned long long)filestat.st_size));

		/* read from filename */
		safe_read (fil_fd,filename,src,i,flags & FLAG_VERBOSE);

		/* read from device */
		safe_read (dev_fd,device,dest,i,flags & FLAG_VERBOSE);

		/* compare buffers */
		if (memcmp (src,dest,i))
		{
			log_printf (LOG_ERROR,
					"File does not seem to match flash data. First mismatch at 0x%.8x-0x%.8x\n",
					written,written + i);
			exit (EXIT_FAILURE);
		}

		written += i;
		size -= i;
	}
	if (flags & FLAG_VERBOSE)
		log_printf (LOG_NORMAL,
				"\rVerifying data: %lluk/%lluk (100%%)\n",
				KB ((unsigned long long)filestat.st_size),
				KB ((unsigned long long)filestat.st_size));
	DEBUG("Verified %d / %lluk bytes\n",written,(unsigned long long)filestat.st_size);

	exit (EXIT_SUCCESS);
}