diff options
Diffstat (limited to 'target/linux/ramips/rt3883/base-files/lib/preinit/04_handle_checksumming')
| -rw-r--r-- | target/linux/ramips/rt3883/base-files/lib/preinit/04_handle_checksumming | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/target/linux/ramips/rt3883/base-files/lib/preinit/04_handle_checksumming b/target/linux/ramips/rt3883/base-files/lib/preinit/04_handle_checksumming new file mode 100644 index 0000000000..e2aef5f1f2 --- /dev/null +++ b/target/linux/ramips/rt3883/base-files/lib/preinit/04_handle_checksumming @@ -0,0 +1,32 @@ +#!/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/functions.sh + + local board=$(board_name) + + case "$board" in + asus,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 |