summaryrefslogtreecommitdiff
path: root/miscutils/flashcp.c
blob: 6cbf455ffdc82307b9d5da7c425c901c1776be61 (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
/* vi: set sw=4 ts=4: */
/*
 * busybox reimplementation of flashcp
 *
 * (C) 2009 Stefan Seyfried <seife@sphairon.com>
 *
 * Licensed under GPLv2, see file LICENSE in this source tree.
 */
//config:config FLASHCP
//config:	bool "flashcp"
//config:	default n  # doesn't build on Ubuntu 8.04
//config:	help
//config:	  The flashcp binary, inspired by mtd-utils as of git head 5eceb74f7.
//config:	  This utility is used to copy images into a MTD device.

//usage:#define flashcp_trivial_usage
//usage:       "-v FILE MTD_DEVICE"
//usage:#define flashcp_full_usage "\n\n"
//usage:       "Copy an image to MTD device\n"
//usage:     "\n	-v	Verbose"

#include "libbb.h"
#include <mtd/mtd-user.h>

/* If 1, simulates "flashing" by writing to existing regular file */
#define MTD_DEBUG 0

#define OPT_v (1 << 0)

#define BUFSIZE (4 * 1024)

static void progress(int mode, uoff_t count, uoff_t total)
{
	uoff_t percent;

	if (!option_mask32) //if (!(option_mask32 & OPT_v))
		return;
	percent = count * 100;
	if (total)
		percent = (unsigned) (percent / total);
	printf("\r%s: %"OFF_FMT"u/%"OFF_FMT"u (%u%%) ",
		(mode < 0) ? "Erasing block" : ((mode == 0) ? "Writing kb" : "Verifying kb"),
		count, total, (unsigned)percent);
	fflush_all();
}

static void progress_newline(void)
{
	if (!option_mask32) //if (!(option_mask32 & OPT_v))
		return;
	bb_putchar('\n');
}

int flashcp_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int flashcp_main(int argc UNUSED_PARAM, char **argv)
{
	int fd_f, fd_d; /* input file and mtd device file descriptors */
	int i;
	uoff_t erase_count;
	struct mtd_info_user mtd;
	struct erase_info_user e;
	struct stat statb;
//	const char *filename, *devicename;
	RESERVE_CONFIG_UBUFFER(buf, BUFSIZE);
	RESERVE_CONFIG_UBUFFER(buf2, BUFSIZE);

	opt_complementary = "=2"; /* exactly 2 non-option args: file, dev */
	/*opts =*/ getopt32(argv, "v");
	argv += optind;
//	filename = *argv++;
//	devicename = *argv;
#define filename argv[0]
#define devicename argv[1]

	/* open input file and mtd device and do sanity checks */
	fd_f = xopen(filename, O_RDONLY);
	fstat(fd_f, &statb);
	fd_d = xopen(devicename, O_SYNC | O_RDWR);
#if !MTD_DEBUG
	if (ioctl(fd_d, MEMGETINFO, &mtd) < 0) {
		bb_error_msg_and_die("%s is not a MTD flash device", devicename);
	}
	if (statb.st_size > mtd.size) {
		bb_error_msg_and_die("%s bigger than %s", filename, devicename);
	}
#else
	mtd.erasesize = 64 * 1024;
#endif

	/* always erase a complete block */
	erase_count = (uoff_t)(statb.st_size + mtd.erasesize - 1) / mtd.erasesize;
	/* erase 1 block at a time to be able to give verbose output */
	e.length = mtd.erasesize;
#if 0
/* (1) bloat
 * (2) will it work for multi-gigabyte devices?
 * (3) worse wrt error detection granularity
 */
	/* optimization: if not verbose, erase in one go */
	if (!opts) { // if (!(opts & OPT_v))
		e.length = mtd.erasesize * erase_count;
		erase_count = 1;
	}
#endif
	e.start = 0;
	for (i = 1; i <= erase_count; i++) {
		progress(-1, i, erase_count);
#if !MTD_DEBUG
		if (ioctl(fd_d, MEMERASE, &e) < 0) {
			bb_perror_msg_and_die("erase error at 0x%llx on %s",
				(long long)e.start, devicename);
		}
#else
		usleep(100*1000);
#endif
		e.start += mtd.erasesize;
	}
	progress_newline();

	/* doing this outer loop gives significantly smaller code
	 * than doing two separate loops for writing and verifying */
	for (i = 0; i <= 1; i++) {
		uoff_t done;
		unsigned count;

		xlseek(fd_f, 0, SEEK_SET);
		xlseek(fd_d, 0, SEEK_SET);
		done = 0;
		count = BUFSIZE;
		while (1) {
			uoff_t rem;

			progress(i, done / 1024, (uoff_t)statb.st_size / 1024);
			rem = statb.st_size - done;
			if (rem == 0)
				break;
			if (rem < BUFSIZE)
				count = rem;
			xread(fd_f, buf, count);
			if (i == 0) {
				int ret;
				if (count < BUFSIZE)
					memset((char*)buf + count, 0, BUFSIZE - count);
				errno = 0;
				ret = full_write(fd_d, buf, BUFSIZE);
				if (ret != BUFSIZE) {
					bb_perror_msg_and_die("write error at 0x%"OFF_FMT"x on %s, "
						"write returned %d",
						done, devicename, ret);
				}
			} else { /* i == 1 */
				xread(fd_d, buf2, count);
				if (memcmp(buf, buf2, count) != 0) {
					bb_error_msg_and_die("verification mismatch at 0x%"OFF_FMT"x", done);
				}
			}

			done += count;
		}

		progress_newline();
	}
	/* we won't come here if there was an error */

	return EXIT_SUCCESS;
}