add sysupgrade support

Signed-off-by: Imre Kaloz <kaloz@openwrt.org>

SVN-Revision: 41630

target/linux/mvebu/base-files/lib/upgrade/linksys.sh

@@ -0,0 +1,54 @@
+#
+# Copyright (C) 2014 OpenWrt.org
+#
+
+linksys_get_target_firmware() {
+	cur_boot_part=`/usr/sbin/fw_printenv -n boot_part`
+	target_firmware=""
+	if [ "$cur_boot_part" = "1" ]
+	then
+		# current primary boot - update alt boot
+		target_firmware="kernel2"
+		fw_setenv boot_part 2
+		fw_setenv bootcmd "run altnandboot"
+	elif [ "$cur_boot_part" = "2" ]
+	then
+		# current alt boot - update primary boot
+		target_firmware="kernel1"
+		fw_setenv boot_part 1
+		fw_setenv bootcmd "run nandboot"
+	fi
+
+	echo "$target_firmware"
+}
+
+platform_do_upgrade_linksys() {
+	local magic_long="$(get_magic_long "$1")"
+
+	mkdir -p /var/lock
+	local part_label="$(linksys_get_target_firmware)"
+	touch /var/lock/fw_printenv.lock
+
+	if [ ! -n "$part_label" ]
+	then
+		echo "cannot find target partition"
+		exit 1
+	fi
+
+	# we don't know, what filesystem does the other partition use,
+	# nuke it tobe safe
+	mtd erase $part_label
+	get_image "$1" | mtd -n write - $part_label
+}
+
+linksys_preupgrade() {
+	export RAMFS_COPY_BIN="${RAMFS_COPY_BIN} /usr/sbin/fw_printenv /usr/sbin/fw_setenv"
+	export RAMFS_COPY_BIN="${RAMFS_COPY_BIN} /bin/mkdir /bin/touch"
+	export RAMFS_COPY_DATA="${RAMFS_COPY_DATA} /etc/fw_env.config /var/lock/fw_printenv.lock"
+
+	[ -f /tmp/sysupgrade.tgz ] && {
+		cp /tmp/sysupgrade.tgz /tmp/syscfg/sysupgrade.tgz
+	}
+}
+
+append sysupgrade_pre_upgrade linksys_preupgrade