mirror of
https://github.com/openwrt/openwrt.git
synced 2025-01-05 05:24:20 +00:00
1e06482f7d
This adds an option to set the recovery flag of newer TP-Link MediaTek boards and remove it after a successful write. To make use of this feature, add the '-t' option to mtd-write. The '-t' option takes the mtd partition containing the recovery flag (usually 'romfile') as an argument. Make sure this partition is not flagged as read-only! Example: > mtd -t romfile write owrt.bin firmware This command writes the recovery-flag before it begins writing the image to the firmware partition. After the image-write has been successful, the recovery flag is removed. This way, the TP-Link web-recovery is automatically enabled on an unsucessful flash (e.g. power loss). This option is only available if the mtd package is compiled for the ramips target. Signed-off-by: David Bauer <mail@david-bauer.net>
95 lines
2.0 KiB
C
95 lines
2.0 KiB
C
/*
|
|
* 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;
|
|
}
|