1 files changed, 78 insertions, 0 deletions
diff --git a/target/linux/ramips/mt7621/base-files/lib/upgrade/ubnt.sh b/target/linux/ramips/mt7621/base-files/lib/upgrade/ubnt.sh
new file mode 100644
index 0000000000..748ec8e628
--- /dev/null
+++ b/target/linux/ramips/mt7621/base-files/lib/upgrade/ubnt.sh
@@ -0,0 +1,78 @@
+#
+# Copyright (C) 2015 OpenWrt.org
+#
+
+. /lib/functions.sh
+#Note: this code also uses some functions from nand.sh, but it is expected to be run by nand.sh, so we are not
+#sourcing it explicitly here
+
+UBNT_ERX_KERNEL_INDEX_OFFSET=160
+
+ubnt_get_target_kernel() {
+	local factory_mtd=$1
+	local current_kernel_index=$(hexdump -s $UBNT_ERX_KERNEL_INDEX_OFFSET -n 1 -e '/1 "%X "' ${factory_mtd})
+
+	if [ $current_kernel_index == "0" ]; then
+		echo 'kernel2'
+	elif [ $current_kernel_index == "1" ]; then
+		echo 'kernel1'
+	fi
+}
+
+ubnt_update_target_kernel() {
+	local factory_mtd=$1
+	local kernel_part=$2
+
+	local new_kernel_index
+	if [ $kernel_part == "kernel1" ]; then
+		new_kernel_index="\x00"
+	elif [ $kernel_part == "kernel2" ]; then
+		new_kernel_index="\x01"
+	else
+		echo 'Unknown kernel image index' >&2
+		return 1
+	fi
+
+	if ! (echo -e $new_kernel_index | dd of=${factory_mtd} bs=1 count=1 seek=$UBNT_ERX_KERNEL_INDEX_OFFSET); then
+		echo 'Failed to update kernel bootup index' >&2
+		return 1
+	fi
+}
+
+platform_upgrade_ubnt_erx() {
+	local factory_mtd=$(find_mtd_part factory)
+	if [ -z "$factory_mtd" ]; then
+		echo "cannot find factory partition" >&2
+		exit 1
+	fi
+
+	local kernel_part="$(ubnt_get_target_kernel ${factory_mtd})"
+	if [ -z "$kernel_part" ]; then
+		echo "cannot find factory partition" >&2
+		exit 1
+	fi
+
+	# This is a global defined in nand.sh, sets partition kernel will be flashed into
+	CI_KERNPART=${kernel_part}
+
+	#Remove volume possibly left over from stock firmware
+	local ubidev="$( nand_find_ubi "$CI_UBIPART" )"
+	if [ -z "$ubidev" ]; then
+		local mtdnum="$( find_mtd_index "$CI_UBIPART" )"
+		if [ -z "$mtdnum" ]; then
+			echo "cannot find ubi mtd partition $CI_UBIPART" >&2
+			exit 1
+		fi
+		ubiattach -m "$mtdnum"
+		sync
+		ubidev="$( nand_find_ubi "$CI_UBIPART" )"
+	fi
+	if [ -n "$ubidev" ]; then
+		local troot_ubivol="$( nand_find_volume $ubidev troot )"
+		[ -n "$troot_ubivol" ] && ubirmvol /dev/$ubidev -N troot || true
+	fi
+
+	ubnt_update_target_kernel ${factory_mtd} ${kernel_part} || exit 1
+
+	nand_do_upgrade "$1"
+}