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
|
/*
* TP-Link recovery flag set and unset code for ramips target
*
* Copyright (C) 2018 David Bauer <mail@david-bauer.net>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License v2
* as published by the Free Software Foundation.
*
* 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 <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <unistd.h>
#include <sys/mman.h>
#include <errno.h>
#include <stdint.h>
#include <mtd/mtd-user.h>
#include <sys/ioctl.h>
#include "mtd.h"
#define TPL_RECOVER_MAGIC 0x89abcdef
#define TPL_NO_RECOVER_MAGIC 0x00000000
struct uboot_args {
uint32_t magic;
};
int mtd_tpl_recoverflag_write(const char *mtd, const bool recovery_active)
{
struct erase_info_user erase_info;
struct uboot_args *args;
uint32_t magic;
int ret = 0;
int fd;
args = malloc(erasesize);
if (!args) {
fprintf(stderr, "Could not allocate memory!\n");
return -1;
}
fd = mtd_check_open(mtd);
if (fd < 0) {
fprintf(stderr, "Could not open mtd device: %s\n", mtd);
ret = -1;
goto out;
}
/* read first block (containing the magic) */
pread(fd, args, erasesize, 0);
/* set magic to desired value */
magic = TPL_RECOVER_MAGIC;
if (!recovery_active)
magic = TPL_NO_RECOVER_MAGIC;
/* no need to write when magic is already set correctly */
if (magic == args->magic)
goto out;
/* erase first block (containing the magic) */
erase_info.start = 0;
erase_info.length = erasesize;
ret = ioctl(fd, MEMERASE, &erase_info);
if (ret < 0) {
fprintf(stderr, "failed to erase block: %i\n", ret);
goto out;
}
/* write magic to flash */
args->magic = magic;
ret = pwrite(fd, args, erasesize, 0);
if (ret < 0)
fprintf(stderr, "failed to write: %i\n", ret);
sync();
out:
free(args);
close(fd);
return ret;
}
|
