#!/bin/sh

UPDATE_URL="http://ppa.linuxfactory.or.kr/images/petitboot"

reboot() {
	echo 1 > /proc/sys/kernel/sysrq
	echo b > /proc/sysrq-trigger
}

get_cpuinfo_hardware() {
	grep ^Hardware /proc/cpuinfo | sed 's/Hardware\s*:\s*//'
}

get_machine() {
	case "$(get_cpuinfo_hardware)" in
		"Hardkernel ODROID-N2" | "Hardkernel ODROID-N2Plus")
			echo "odroidn2"
			;;
		"Hardkernel ODROID-HC4")
			echo "odroidhc4"
			;;
	esac
}

. /etc/spiupdate

url=$UPDATE_URL/$(get_machine)/latest
update=$(wget -qO - $url 2>/dev/null)
if [ "x$update" = "x" ]; then
	echo "E: Invalid update info from $url"
	exit 1
fi

hash1=$(echo $update | awk '{print $1}')
link=$(echo $update | awk '{print $2}')

mkdir -p /opt
if ! wget $link -O /opt/spiboot.img  2>/dev/null; then
	echo "E: Invalid download link '$link'"
	exit 1
fi

hash2=$(md5sum /opt/spiboot.img | awk '{print $1}')
if [ $hash1 != $hash2 ]; then
	echo "E: Update binary is invalid (hash is not matched)"
	exit 1
fi

if spiflash_update; then
	sleep 5
	reboot
fi