openwrt/package/base-files/files/etc/init.d/led

#!/bin/sh /etc/rc.common
# Copyright (C) 2008 OpenWrt.org

START=96

led_color_set() {
	local cfg="$1"
	local sysfs="$2"

	local max_b
	local colors
	local color
	local multi_intensity
	local value
	local write

	[ -e /sys/class/leds/${sysfs}/multi_intensity ] || return
	[ -e /sys/class/leds/${sysfs}/multi_index ] || return

	max_b="$(cat /sys/class/leds/${sysfs}/max_brightness)"
	colors="$(cat /sys/class/leds/${sysfs}/multi_index | tr " " "\n")"
	multi_intensity=""
	for color in $colors; do
		config_get value $1 "color_${color}" "0"
		[ "$value" -gt 0 ] && write=1
		[ "$value" -gt "$max_b" ] && value="$max_b"
		multi_intensity="${multi_intensity}${value} "
	done

	# Check if any color is configured
	[ "$write" = 1 ] || return
	# Remove last whitespace
	multi_intensity="${multi_intensity:0:-1}"

	echo "setting '${name}' led color to '${multi_intensity}'"
	echo "${multi_intensity}" > /sys/class/leds/${sysfs}/multi_intensity
}

load_led() {
	local name
	local sysfs
	local trigger
	local dev
	local ports
	local mode
	local default
	local delayon
	local delayoff
	local interval

	config_get sysfs $1 sysfs
	config_get name $1 name "$sysfs"
	config_get trigger $1 trigger "none"
	config_get dev $1 dev
	config_get ports $1 port
	config_get mode $1 mode
	config_get_bool default $1 default "0"
	config_get delayon $1 delayon
	config_get delayoff $1 delayoff
	config_get interval $1 interval "50"
	config_get port_state $1 port_state
	config_get delay $1 delay "150"
	config_get message $1 message ""
	config_get gpio $1 gpio "0"
	config_get_bool inverted $1 inverted "0"

	# execute application led trigger
	[ -f "/usr/libexec/led-trigger/${trigger}" ] && {
		. "/usr/libexec/led-trigger/${trigger}"
		return 0
	}

	[ "$trigger" = "usbdev" ] && {
		# Backward compatibility: translate to the new trigger
		trigger="usbport"
		# Translate port of root hub, e.g. 4-1 -> usb4-port1
		ports=$(echo "$dev" | sed -n 's/^\([0-9]*\)-\([0-9]*\)$/usb\1-port\2/p')
		# Translate port of extra hub, e.g. 2-2.4 -> 2-2-port4
		[ -z "$ports" ] && ports=$(echo "$dev" | sed -n 's/\./-port/p')
	}

	[ -e /sys/class/leds/${sysfs}/brightness ] && {
		echo "setting up led ${name}"

		printf "%s %s %d" \
			"$sysfs" \
			"$(sed -ne 's/^.*\[\(.*\)\].*$/\1/p' /sys/class/leds/${sysfs}/trigger)" \
			"$(cat /sys/class/leds/${sysfs}/brightness)" \
				>> /var/run/led.state
		# Save default color if supported
		[ -e /sys/class/leds/${sysfs}/multi_intensity ] && {
			printf " %s" \
				"$(sed 's/\ /:/g' /sys/class/leds/${sysfs}/multi_intensity)" \
				>> /var/run/led.state
		}
		printf "\n" >> /var/run/led.state

		[ "$default" = 0 ] &&
			echo 0 >/sys/class/leds/${sysfs}/brightness

		[ $default = 1 ] &&
			cat /sys/class/leds/${sysfs}/max_brightness > /sys/class/leds/${sysfs}/brightness

		led_color_set "$1" "$sysfs"

		echo $trigger > /sys/class/leds/${sysfs}/trigger 2> /dev/null
		ret="$?"
		[ $ret = 0 ] || {
			echo >&2 "Skipping trigger '$trigger' for led '$name' due to missing kernel module"
			return 1
		}
		case "$trigger" in
		"heartbeat")
			echo "${inverted}" > "/sys/class/leds/${sysfs}/invert"
			;;

		"netdev")
			[ -n "$dev" ] && {
				echo $dev > /sys/class/leds/${sysfs}/device_name
				for m in $mode; do
					[ -e "/sys/class/leds/${sysfs}/$m" ] && \
						echo 1 > /sys/class/leds/${sysfs}/$m
				done
				echo $interval > /sys/class/leds/${sysfs}/interval
			}
			;;

		"timer"|"oneshot")
			[ -n "$delayon" ] && \
				echo $delayon > /sys/class/leds/${sysfs}/delay_on
			[ -n "$delayoff" ] && \
				echo $delayoff > /sys/class/leds/${sysfs}/delay_off
			;;

		"usbport")
			local p

			for p in $ports; do
				echo 1 > /sys/class/leds/${sysfs}/ports/$p
			done
			;;

		"port_state")
			[ -n "$port_state" ] && \
				echo $port_state > /sys/class/leds/${sysfs}/port_state
			;;

		"gpio")
			echo $gpio > /sys/class/leds/${sysfs}/gpio
			echo $inverted > /sys/class/leds/${sysfs}/inverted
			;;

		switch[0-9]*)
			local port_mask speed_mask

			config_get port_mask $1 port_mask
			[ -n "$port_mask" ] && \
				echo $port_mask > /sys/class/leds/${sysfs}/port_mask
			config_get speed_mask $1 speed_mask
			[ -n "$speed_mask" ] && \
				echo $speed_mask > /sys/class/leds/${sysfs}/speed_mask
			[ -n "$mode" ] && \
				echo "$mode" > /sys/class/leds/${sysfs}/mode
			;;
		esac
	}
}

start() {
	[ -e /sys/class/leds/ ] && {
		[ -s /var/run/led.state ] && {
			local led trigger brightness color
			while read led trigger brightness color; do
				[ -e "/sys/class/leds/$led/trigger" ] && \
					echo "$trigger" > "/sys/class/leds/$led/trigger"

				[ -e "/sys/class/leds/$led/brightness" ] && \
					echo "$brightness" > "/sys/class/leds/$led/brightness"

				[ -e "/sys/class/leds/$led/multi_intensity" ] && \
					echo "$color" | sed 's/:/\ /g' > \
						"/sys/class/leds/$led/multi_intensity"
			done < /var/run/led.state
			rm /var/run/led.state
		}

		config_load system
		config_foreach load_led led
	}
}