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
|
/*
* rfdformat.c
*
* Copyright (C) 2005 Sean Young <sean@mess.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.
*
* $Id: rfdformat.c,v 1.3 2005/11/07 11:15:14 gleixner Exp $
*
* This is very easy: just erase all the blocks and put the magic at
* the beginning of each block.
*/
#define _XOPEN_SOURCE 500 /* For pread/pwrite */
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <unistd.h>
#include <getopt.h>
#include <mtd/mtd-user.h>
#include <linux/types.h>
#define PROGRAM "rfdformat"
#define VERSION "$Revision 1.0 $"
void display_help(void)
{
printf("Usage: " PROGRAM " [OPTIONS] MTD-device\n"
"Formats NOR flash for resident flash disk\n"
"\n"
"-h --help display this help and exit\n"
"-V --version output version information and exit\n");
exit(0);
}
void display_version(void)
{
printf(PROGRAM " " VERSION "\n"
"\n"
"This is free software; see the source for copying conditions. There is NO\n"
"warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n");
exit(0);
}
void process_options(int argc, char *argv[], const char **mtd_filename)
{
int error = 0;
for (;;) {
int option_index = 0;
static const char *short_options = "hV";
static const struct option long_options[] = {
{ "help", no_argument, 0, 'h' },
{ "version", no_argument, 0, 'V', },
{ NULL, 0, 0, 0 }
};
int c = getopt_long(argc, argv, short_options,
long_options, &option_index);
if (c == EOF)
break;
switch (c) {
case 'h':
display_help();
break;
case 'V':
display_version();
break;
case '?':
error = 1;
break;
}
}
if ((argc - optind) != 1 || error)
display_help();
*mtd_filename = argv[optind];
}
int main(int argc, char *argv[])
{
static const uint8_t magic[] = { 0x93, 0x91 };
int fd, block_count, i;
struct mtd_info_user mtd_info;
char buf[512];
const char *mtd_filename;
process_options(argc, argv, &mtd_filename);
fd = open(mtd_filename, O_RDWR);
if (fd == -1) {
perror(mtd_filename);
return 1;
}
if (ioctl(fd, MEMGETINFO, &mtd_info)) {
perror(mtd_filename);
close(fd);
return 1;
}
if (mtd_info.type != MTD_NORFLASH) {
fprintf(stderr, "%s: not NOR flash\n", mtd_filename);
close(fd);
return 2;
}
if (mtd_info.size > 32*1024*1024) {
fprintf(stderr, "%s: flash larger than 32MiB not supported\n",
mtd_filename);
close(fd);
return 2;
}
block_count = mtd_info.size / mtd_info.erasesize;
if (block_count < 2) {
fprintf(stderr, "%s: at least two erase units required\n",
mtd_filename);
close(fd);
return 2;
}
for (i=0; i<block_count; i++) {
struct erase_info_user erase_info;
erase_info.start = i * mtd_info.erasesize;
erase_info.length = mtd_info.erasesize;
if (ioctl(fd, MEMERASE, &erase_info) != 0) {
snprintf(buf, sizeof(buf), "%s: erase", mtd_filename);
perror(buf);
close(fd);
return 2;
}
if (pwrite(fd, magic, sizeof(magic), i * mtd_info.erasesize)
!= sizeof(magic)) {
snprintf(buf, sizeof(buf), "%s: write", mtd_filename);
perror(buf);
close(fd);
return 2;
}
}
close(fd);
return 0;
}
|
