You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
56 lines
2.1 KiB
56 lines
2.1 KiB
#!/bin/sh
|
|
|
|
# Netgear WNCE2001 has does a checksum check on boot and goes into recovery
|
|
# tftp mode when the check fails. Initializing the JFFS2 partition triggers
|
|
# this, so we make sure to zero checksum and size to be checksummed before
|
|
# that happens, so this needs to run very early during boot.
|
|
|
|
do_checksumming_disable() {
|
|
. /lib/ramips.sh
|
|
|
|
local board=$(ramips_board_name)
|
|
|
|
case "$board" in
|
|
wnce2001)
|
|
echo "Board is WNCE2001, updating checksum partition..."
|
|
local zeroes=/dev/zero
|
|
local tmpfile=/tmp/wnce2001_checksum
|
|
local partname=checksum
|
|
local mtd=$(find_mtd_part $partname)
|
|
dd if=$mtd of=$tmpfile bs=80 count=1 2>/dev/null
|
|
signature=$(dd if=$tmpfile bs=1 skip=24 count=20 2>/dev/null)
|
|
checksum=$(dd if=$tmpfile bs=1 count=4 2>/dev/null | hexdump -v -n 4 -e '1/1 "%02x"')
|
|
if [ "$signature" != "RT3052-AP-WNCE2001-3" ]; then
|
|
echo "Signature of checksum partition is wrong, bailing."
|
|
return 0
|
|
fi
|
|
if [ "$checksum" != "00000000" ]; then
|
|
echo "Checksum is set, zeroing."
|
|
# zero out checksum
|
|
dd if=$zeroes of=$tmpfile conv=notrunc bs=1 seek=0 count=4 2>/dev/null
|
|
# zero out bytecount to be checksummed
|
|
dd if=$zeroes of=$tmpfile conv=notrunc bs=1 seek=60 count=4 2>/dev/null
|
|
mtd write $tmpfile $partname
|
|
else
|
|
echo "Checksum is already zero, nothing to do."
|
|
fi
|
|
;;
|
|
rt-n56u)
|
|
echo "Board is ASUS RT-N56U, replacing uImage header..."
|
|
local firmware_mtd=$(find_mtd_part firmware)
|
|
local rootfs_mtd=$(find_mtd_part rootfs)
|
|
local rootfs_data_mtd=$(find_mtd_part rootfs_data)
|
|
local rootfs_len=$(grep \"rootfs\" /proc/mtd | awk -F' ' '{print "0x"$2}')
|
|
local rootfs_data_len=$(grep \"rootfs_data\" /proc/mtd | awk -F' ' '{print "0x"$2}')
|
|
local offset=$(echo "$rootfs_len $rootfs_data_len 0x40" | awk -F' ' '{printf "%i",$1-$2-$3}')
|
|
local signature=$(dd if=$rootfs_mtd skip=$offset bs=1 count=4 2>/dev/null | hexdump -v -n 4 -e '1/1 "%02x"')
|
|
if [ "$signature" = "27051956" ]; then
|
|
dd conv=notrunc if=$rootfs_mtd skip=$offset of=$firmware_mtd bs=1 count=64 2>/dev/null
|
|
fi
|
|
;;
|
|
esac
|
|
|
|
return 0
|
|
}
|
|
|
|
boot_hook_add preinit_main do_checksumming_disable
|
|
|