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
|
/* flash_erase.c -- erase MTD devices
Copyright (C) 2000 Arcom Control System Ltd
Copyright (C) 2010 Mike Frysinger <vapier@gentoo.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
*/
#define PROGRAM_NAME "flash_erase"
#include <inttypes.h>
#include <stdbool.h>
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <stdint.h>
#include <getopt.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <common.h>
#include <crc32.h>
#include <libmtd.h>
#include <mtd/mtd-user.h>
#include <mtd/jffs2-user.h>
static const char *mtd_device;
static int quiet; /* true -- don't output progress */
static int jffs2; /* format for jffs2 usage */
static int noskipbad; /* do not skip bad blocks */
static int unlock; /* unlock sectors before erasing */
static struct jffs2_unknown_node cleanmarker;
int target_endian = __BYTE_ORDER;
static void show_progress(struct mtd_dev_info *mtd, off_t start, int eb,
int eb_start, int eb_cnt)
{
bareverbose(!quiet, "\rErasing %d Kibyte @ %"PRIxoff_t" -- %2i %% complete ",
mtd->eb_size / 1024, start, ((eb - eb_start) * 100) / eb_cnt);
fflush(stdout);
}
static void display_help (void)
{
printf("Usage: %s [options] MTD_DEVICE <start offset> <block count>\n"
"Erase blocks of the specified MTD device.\n"
"Specify a count of 0 to erase to end of device.\n"
"\n"
" -j, --jffs2 format the device for jffs2\n"
" -N, --noskipbad don't skip bad blocks\n"
" -u, --unlock unlock sectors before erasing\n"
" -q, --quiet do not display progress messages\n"
" --silent same as --quiet\n"
" --help display this help and exit\n"
" --version output version information and exit\n",
PROGRAM_NAME);
}
static void display_version (void)
{
common_print_version();
printf("Copyright (C) 2000 Arcom Control Systems Ltd\n"
"\n"
"%1$s comes with NO WARRANTY\n"
"to the extent permitted by law.\n"
"\n"
"You may redistribute copies of %1$s\n"
"under the terms of the GNU General Public Licence.\n"
"See the file `COPYING' for more information.\n",
PROGRAM_NAME);
}
int main(int argc, char *argv[])
{
libmtd_t mtd_desc;
struct mtd_dev_info mtd;
int fd, cmlen = 8;
unsigned long long start;
unsigned int eb, eb_start, eb_cnt;
bool isNAND;
int error = 0;
off_t offset = 0;
/*
* Process user arguments
*/
for (;;) {
int option_index = 0;
static const char *short_options = "jNquVh";
static const struct option long_options[] = {
{"help", no_argument, 0, 'h'},
{"version", no_argument, 0, 'V'},
{"jffs2", no_argument, 0, 'j'},
{"noskipbad", no_argument, 0, 'N'},
{"quiet", no_argument, 0, 'q'},
{"silent", no_argument, 0, 'q'},
{"unlock", no_argument, 0, 'u'},
{0, 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();
return EXIT_SUCCESS;
case 'V':
display_version();
return EXIT_SUCCESS;
case 'j':
jffs2 = 1;
break;
case 'N':
noskipbad = 1;
break;
case 'q':
quiet = 1;
break;
case 'u':
unlock = 1;
break;
case '?':
error = 1;
break;
}
}
switch (argc - optind) {
case 3:
mtd_device = argv[optind];
start = simple_strtoull(argv[optind + 1], &error);
eb_cnt = simple_strtoul(argv[optind + 2], &error);
break;
default:
case 0:
errmsg("no MTD device specified");
/* fall-through */
case 1:
errmsg("no start erase block specified");
/* fall-through */
case 2:
errmsg("no erase block count specified");
error = 1;
break;
}
if (error)
return errmsg("Try `--help' for more information");
/*
* Locate MTD and prepare for erasure
*/
mtd_desc = libmtd_open();
if (mtd_desc == NULL)
return errmsg("can't initialize libmtd");
if ((fd = open(mtd_device, O_RDWR)) < 0)
return sys_errmsg("%s", mtd_device);
if (mtd_get_dev_info(mtd_desc, mtd_device, &mtd) < 0)
return errmsg("mtd_get_dev_info failed");
if (jffs2 && mtd.type == MTD_MLCNANDFLASH)
return errmsg("JFFS2 cannot support MLC NAND.");
eb_start = start / mtd.eb_size;
isNAND = mtd.type == MTD_NANDFLASH || mtd.type == MTD_MLCNANDFLASH;
if (jffs2) {
cleanmarker.magic = cpu_to_je16 (JFFS2_MAGIC_BITMASK);
cleanmarker.nodetype = cpu_to_je16 (JFFS2_NODETYPE_CLEANMARKER);
if (!isNAND) {
cleanmarker.totlen = cpu_to_je32(sizeof(cleanmarker));
} else {
cleanmarker.totlen = cpu_to_je32(8);
cmlen = min(mtd.oobavail, 8);
}
cleanmarker.hdr_crc = cpu_to_je32(mtd_crc32(0, &cleanmarker, sizeof(cleanmarker) - 4));
}
/*
* Now do the actual erasing of the MTD device
*/
if (eb_cnt == 0)
eb_cnt = (mtd.size / mtd.eb_size) - eb_start;
for (eb = eb_start; eb < eb_start + eb_cnt; eb++) {
offset = (off_t)eb * mtd.eb_size;
if (!noskipbad) {
int ret = mtd_is_bad(&mtd, fd, eb);
if (ret > 0) {
verbose(!quiet, "Skipping bad block at %08"PRIxoff_t, offset);
continue;
} else if (ret < 0) {
if (errno == EOPNOTSUPP) {
noskipbad = 1;
if (isNAND)
return errmsg("%s: Bad block check not available", mtd_device);
} else
return sys_errmsg("%s: MTD get bad block failed", mtd_device);
}
}
show_progress(&mtd, offset, eb, eb_start, eb_cnt);
if (unlock) {
if (mtd_unlock(&mtd, fd, eb) != 0) {
sys_errmsg("%s: MTD unlock failure", mtd_device);
continue;
}
}
if (mtd_erase(mtd_desc, &mtd, fd, eb) != 0) {
sys_errmsg("%s: MTD Erase failure", mtd_device);
continue;
}
/* format for JFFS2 ? */
if (!jffs2)
continue;
/* write cleanmarker */
if (isNAND) {
if (mtd_write(mtd_desc, &mtd, fd, eb, 0, NULL, 0, &cleanmarker, cmlen,
MTD_OPS_AUTO_OOB) != 0) {
sys_errmsg("%s: MTD writeoob failure", mtd_device);
continue;
}
} else {
if (pwrite(fd, &cleanmarker, sizeof(cleanmarker), (loff_t)offset) != sizeof(cleanmarker)) {
sys_errmsg("%s: MTD write failure", mtd_device);
continue;
}
}
verbose(!quiet, " Cleanmarker Updated.");
}
show_progress(&mtd, offset, eb, eb_start, eb_cnt);
bareverbose(!quiet, "\n");
return 0;
}
|
