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 <m...@david-bauer.net>
---
package/system/mtd/Makefile | 2 +-
package/system/mtd/src/Makefile | 3 +-
package/system/mtd/src/mtd.c | 33 ++++++-
package/system/mtd/src/mtd.h | 1 +
.../system/mtd/src/tpl_ramips_recoveryflag.c | 94 +++++++++++++++++++
5 files changed, 130 insertions(+), 3 deletions(-)
create mode 100644 package/system/mtd/src/tpl_ramips_recoveryflag.c
diff --git a/package/system/mtd/Makefile b/package/system/mtd/Makefile
index 65de47f23f..c307555436 100644
--- a/package/system/mtd/Makefile
+++ b/package/system/mtd/Makefile
@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
include $(INCLUDE_DIR)/kernel.mk
PKG_NAME:=mtd
-PKG_RELEASE:=23
+PKG_RELEASE:=24
PKG_BUILD_DIR := $(KERNEL_BUILD_DIR)/$(PKG_NAME)
STAMP_PREPARED := $(STAMP_PREPARED)_$(call confvar,CONFIG_MTD_REDBOOT_PARTS)
diff --git a/package/system/mtd/src/Makefile b/package/system/mtd/src/Makefile
index daeadbcd35..90b72dec02 100644
--- a/package/system/mtd/src/Makefile
+++ b/package/system/mtd/src/Makefile
@@ -6,12 +6,13 @@ obj = mtd.o jffs2.o crc32.o md5.o
obj.seama = seama.o md5.o
obj.wrg = wrg.o md5.o
obj.wrgg = wrgg.o md5.o
+obj.tpl = tpl_ramips_recoveryflag.o
obj.ar71xx = trx.o $(obj.seama) $(obj.wrgg)
obj.brcm = trx.o
obj.brcm47xx = $(obj.brcm)
obj.bcm53xx = $(obj.brcm) $(obj.seama)
obj.brcm63xx = imagetag.o
-obj.ramips = $(obj.seama) $(obj.wrg)
+obj.ramips = $(obj.seama) $(obj.tpl) $(obj.wrg)
obj.mvebu = linksys_bootcount.o
obj.kirkwood = linksys_bootcount.o
obj.ipq806x = linksys_bootcount.o
diff --git a/package/system/mtd/src/mtd.c b/package/system/mtd/src/mtd.c
index fa04c0f95b..eccb4f6a1a 100644
--- a/package/system/mtd/src/mtd.c
+++ b/package/system/mtd/src/mtd.c
@@ -85,6 +85,7 @@ static char *buf = NULL;
static char *imagefile = NULL;
static enum mtd_image_format imageformat = MTD_IMAGE_FORMAT_UNKNOWN;
static char *jffs2file = NULL, *jffs2dir = JFFS2_DEFAULT_DIR;
+static char *tpl_uboot_args_part;
static int buflen = 0;
int quiet;
int no_erase;
@@ -554,6 +555,17 @@ resume:
lseek(fd, part_offset, SEEK_SET);
}
+ /* Write TP-Link recovery flag */
+ if (tpl_uboot_args_part && mtd_tpl_recoverflag_write) {
+ if (quiet < 2)
+ fprintf(stderr, "Writing recovery flag to %s\n",
tpl_uboot_args_part);
+ result = mtd_tpl_recoverflag_write(tpl_uboot_args_part, true);
+ if (result < 0) {
+ fprintf(stderr, "Could not write TP-Link recovery flag
to %s: %i", mtd, result);
+ exit(1);
+ }
+ }
+
indicate_writing(mtd);
w = e = 0;
@@ -716,6 +728,18 @@ resume:
#endif
close(fd);
+
+ /* Clear TP-Link recovery flag */
+ if (tpl_uboot_args_part && mtd_tpl_recoverflag_write) {
+ if (quiet < 2)
+ fprintf(stderr, "Removing recovery flag from %s\n",
tpl_uboot_args_part);
+ result = mtd_tpl_recoverflag_write(tpl_uboot_args_part, false);
+ if (result < 0) {
+ fprintf(stderr, "Could not clear TP-Link recovery flag
to %s: %i", mtd, result);
+ exit(1);
+ }
+ }
+
return 0;
}
@@ -771,6 +795,10 @@ static void usage(void)
fprintf(stderr,
" -c datasize amount of data to be used for checksum
calculation (for fixtrx / fixseama / fixwrg / fixwrgg)\n");
}
+ if (mtd_tpl_recoverflag_write) {
+ fprintf(stderr,
+ " -t <partition> write TP-Link recovery-flag to
<partition> (for write)\n");
+ }
fprintf(stderr,
#ifdef FIS_SUPPORT
" -F <part>[:<size>[:<entrypoint>]][,<part>...]\n"
@@ -828,7 +856,7 @@ int main (int argc, char **argv)
#ifdef FIS_SUPPORT
"F:"
#endif
- "frnqe:d:s:j:p:o:c:l:")) != -1)
+ "frnqe:d:s:j:p:o:c:t:l:")) != -1)
switch (ch) {
case 'f':
force = 1;
@@ -896,6 +924,9 @@ int main (int argc, char **argv)
usage();
}
break;
+ case 't':
+ tpl_uboot_args_part = optarg;
+ break;
#ifdef FIS_SUPPORT
case 'F':
fis_layout = optarg;
diff --git a/package/system/mtd/src/mtd.h b/package/system/mtd/src/mtd.h
index 0250a90e0b..3eda6159c6 100644
--- a/package/system/mtd/src/mtd.h
+++ b/package/system/mtd/src/mtd.h
@@ -30,4 +30,5 @@ extern int mtd_fixseama(const char *mtd, size_t offset,
size_t data_size) __attr
extern int mtd_fixwrg(const char *mtd, size_t offset, size_t data_size)
__attribute__ ((weak));
extern int mtd_fixwrgg(const char *mtd, size_t offset, size_t data_size)
__attribute__ ((weak));
extern int mtd_resetbc(const char *mtd) __attribute__ ((weak));
+extern int mtd_tpl_recoverflag_write(const char *mtd, const bool
recovery_active) __attribute__ ((weak));
#endif /* __mtd_h */
diff --git a/package/system/mtd/src/tpl_ramips_recoveryflag.c
b/package/system/mtd/src/tpl_ramips_recoveryflag.c
new file mode 100644
index 0000000000..3711e01317
--- /dev/null
+++ b/package/system/mtd/src/tpl_ramips_recoveryflag.c
@@ -0,0 +1,94 @@
+/*
+ * TP-Link recovery flag set and unset code for ramips target
+ *
+ * Copyright (C) 2018 David Bauer <m...@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;
+}
--
2.20.1
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