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>master
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/*
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* TP-Link recovery flag set and unset code for ramips target |
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* |
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* Copyright (C) 2018 David Bauer <mail@david-bauer.net> |
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* |
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* This program is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU General Public License v2 |
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* as published by the Free Software Foundation. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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*/ |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <stddef.h> |
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#include <unistd.h> |
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#include <sys/mman.h> |
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#include <errno.h> |
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#include <stdint.h> |
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#include <mtd/mtd-user.h> |
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#include <sys/ioctl.h> |
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#include "mtd.h" |
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#define TPL_RECOVER_MAGIC 0x89abcdef |
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#define TPL_NO_RECOVER_MAGIC 0x00000000 |
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struct uboot_args { |
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uint32_t magic; |
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}; |
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int mtd_tpl_recoverflag_write(const char *mtd, const bool recovery_active) |
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{ |
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struct erase_info_user erase_info; |
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struct uboot_args *args; |
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uint32_t magic; |
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int ret = 0; |
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int fd; |
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args = malloc(erasesize); |
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if (!args) { |
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fprintf(stderr, "Could not allocate memory!\n"); |
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return -1; |
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} |
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fd = mtd_check_open(mtd); |
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if (fd < 0) { |
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fprintf(stderr, "Could not open mtd device: %s\n", mtd); |
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ret = -1; |
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goto out; |
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} |
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/* read first block (containing the magic) */ |
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pread(fd, args, erasesize, 0); |
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/* set magic to desired value */ |
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magic = TPL_RECOVER_MAGIC; |
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if (!recovery_active) |
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magic = TPL_NO_RECOVER_MAGIC; |
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/* no need to write when magic is already set correctly */ |
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if (magic == args->magic) |
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goto out; |
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/* erase first block (containing the magic) */ |
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erase_info.start = 0; |
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erase_info.length = erasesize; |
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ret = ioctl(fd, MEMERASE, &erase_info); |
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if (ret < 0) { |
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fprintf(stderr, "failed to erase block: %i\n", ret); |
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goto out; |
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} |
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/* write magic to flash */ |
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args->magic = magic; |
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ret = pwrite(fd, args, erasesize, 0); |
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if (ret < 0) |
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fprintf(stderr, "failed to write: %i\n", ret); |
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sync(); |
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out: |
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free(args); |
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close(fd); |
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return ret; |
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} |
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