summaryrefslogtreecommitdiffstats
path: root/commands/flash.c
blob: d881b4d399ea6418708d9e2d136371bfe523d522 (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
/*
 * erase, protect, unprotect - FLASH support
 *
 * (C) Copyright 2000
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * 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.
 *
 */

#include <common.h>
#include <command.h>
#include <errno.h>
#include <getopt.h>
#include <fs.h>
#include <fcntl.h>
#include <linux/stat.h>

static int do_flerase(int argc, char *argv[])
{
	int fd;
	char *filename = NULL;
	struct stat s;
	loff_t start = 0, size;
	int ret = 0;

	if (argc == 1)
		return COMMAND_ERROR_USAGE;

	filename = argv[1];

	if (stat(filename, &s)) {
		printf("stat %s: %s\n", filename, errno_str());
		return 1;
	}

	size = s.st_size;

	fd = open(filename, O_WRONLY);
	if (fd < 0) {
		printf("open %s: %s\n", filename, errno_str());
		return 1;
	}

	if (argc == 3 && parse_area_spec(argv[2], &start, &size)) {
		printf("could not parse: %s\n", argv[optind]);
		ret = 1;
		goto out;
	}

	if (erase(fd, size, start)) {
		perror("erase");
		ret = 1;
	}
out:
	close(fd);

	return ret;
}

BAREBOX_CMD_HELP_START(erase)
BAREBOX_CMD_HELP_TEXT("Erase the flash memory handled by DEVICE. Which AREA will be erased")
BAREBOX_CMD_HELP_TEXT("depends on the device: If the device represents the whole flash")
BAREBOX_CMD_HELP_TEXT("memory, the whole memory will be erased. If the device represents a")
BAREBOX_CMD_HELP_TEXT("partition on a main flash memory, only this partition part will be")
BAREBOX_CMD_HELP_TEXT("erased.")
BAREBOX_CMD_HELP_TEXT("")
BAREBOX_CMD_HELP_TEXT("Use 'addpart' and 'delpart' to manage partitions.")
BAREBOX_CMD_HELP_END

BAREBOX_CMD_START(erase)
	.cmd		= do_flerase,
	BAREBOX_CMD_DESC("erase flash memory")
	BAREBOX_CMD_OPTS("DEVICE [AREA]")
	BAREBOX_CMD_GROUP(CMD_GRP_HWMANIP)
	BAREBOX_CMD_HELP(cmd_erase_help)
BAREBOX_CMD_END

static int do_protect(int argc, char *argv[])
{
	int fd;
	char *filename = NULL;
	struct stat s;
	int prot = 1;
	loff_t start = 0, size = ~0;
	int ret = 0, err;

	if (argc == 1)
		return COMMAND_ERROR_USAGE;

	filename = argv[1];

	if (*argv[0] == 'u')
		prot = 0;

	if (stat(filename, &s)) {
		printf("stat %s: %s\n", filename, errno_str());
		return 1;
	}

	size = s.st_size;

	fd = open(filename, O_WRONLY);
	if (fd < 0) {
		printf("open %s: %s\n", filename, errno_str());
		return 1;
	}

	if (argc == 3)
		if (parse_area_spec(argv[2], &start, &size)) {
			printf("could not parse: %s\n", argv[optind]);
			ret = 1;
			goto out;
		}

	err = protect(fd, size, start, prot);
        if (err && err != -ENOSYS) {
		perror("protect");
		ret = 1;
		goto out;
	}
out:
	close(fd);

	return ret;
}

BAREBOX_CMD_HELP_START(protect)
BAREBOX_CMD_HELP_TEXT("Protect the flash memory behind the device. It depends on the device")
BAREBOX_CMD_HELP_TEXT("given, what area will be protected. If the device represents the whole")
BAREBOX_CMD_HELP_TEXT("flash memory, the whole memory will be protected. If the device")
BAREBOX_CMD_HELP_TEXT("represents a partition on a main flash memory, only this partition part")
BAREBOX_CMD_HELP_TEXT("will be protected.")
BAREBOX_CMD_HELP_TEXT("")
BAREBOX_CMD_HELP_TEXT("Use 'addpart' and 'delpart' to manage partitions.")
BAREBOX_CMD_HELP_END

BAREBOX_CMD_START(protect)
	.cmd		= do_protect,
	BAREBOX_CMD_DESC("enable flash write protection")
	BAREBOX_CMD_OPTS("DEVICE [AREA]")
	BAREBOX_CMD_GROUP(CMD_GRP_HWMANIP)
	BAREBOX_CMD_HELP(cmd_protect_help)
BAREBOX_CMD_END

BAREBOX_CMD_HELP_START(unprotect)
BAREBOX_CMD_HELP_TEXT("Unprotect the flash memory behind the device. It depends on the device")
BAREBOX_CMD_HELP_TEXT("given, what area will be unprotected. If the device represents the whole")
BAREBOX_CMD_HELP_TEXT("flash memory, the whole memory will be unprotected. If the device")
BAREBOX_CMD_HELP_TEXT("represents a partition on a main flash memory, only this partition part")
BAREBOX_CMD_HELP_TEXT("will be unprotected.")
BAREBOX_CMD_HELP_END

BAREBOX_CMD_START(unprotect)
	.cmd		= do_protect,
	BAREBOX_CMD_DESC("disable flash write protection")
	BAREBOX_CMD_OPTS("DEVICE [AREA]")
	BAREBOX_CMD_GROUP(CMD_GRP_HWMANIP)
	BAREBOX_CMD_HELP(cmd_unprotect_help)
BAREBOX_CMD_END