usbpower

#!/usr/bin/env sh

#
# https://www.kernel.org/doc/Documentation/usb/power-management.txt
#

set -eu


function fn_help() {
	cat << __EOS__
Usage: usbpower COMMAND [USB_DEV_NO]

Commands:
	ls      list usb device poewr states
	on      resume USB device and NOT allow autosuspend
	auto    allow autoresume and autosuspend USB device
	help    show this usage

__EOS__
}


function fn_ls() {
	USB_DEVICE_NUMBER_LIST=(1 2 3 4 5)

	if [ $# -gt 0 ]; then
		VAR=`expr ${1}`
		if [ ${VAR} -ge 1 -a ${VAR} -le 5 ]; then
			USB_DEVICE_NUMBER_LIST=(${1})
		else
			echo "Invalid USB Device Number: $1"
			exit
		fi
	fi

	for USB_MINOR_NUMBER in ${USB_DEVICE_NUMBER_LIST[@]}
	do

		USB_POW_PATH="/sys/bus/usb/devices/usb${USB_MINOR_NUMBER}/power"

		ACTIVE_DURATION=`cat ${USB_POW_PATH}/active_duration`
		ASYNC=`cat ${USB_POW_PATH}/async`
		AUTOSUSPEND=`cat ${USB_POW_PATH}/autosuspend`
		AUTOSUSPEND_DELAY_MS=`cat ${USB_POW_PATH}/autosuspend_delay_ms`
		CONNECTED_DURATION=`cat ${USB_POW_PATH}/connected_duration`
		CONTROL=`cat ${USB_POW_PATH}/control`
		LEVEL=`cat ${USB_POW_PATH}/level`
		RUNTIME_ACTIVE_KIDS=`cat ${USB_POW_PATH}/runtime_active_kids`
		RUNTIME_ACTIVE_TIME=`cat ${USB_POW_PATH}/runtime_active_time`
		RUNTIME_ENABLED=`cat ${USB_POW_PATH}/runtime_enabled`
		RUNTIME_STATUS=`cat ${USB_POW_PATH}/runtime_status`
		RUNTIME_SUSPENDED_TIME=`cat ${USB_POW_PATH}/runtime_suspended_time`
		RUNTIME_USAGE=`cat ${USB_POW_PATH}/runtime_usage`
		WAKEUP=`cat ${USB_POW_PATH}/wakeup`
		WAKEUP_ABORT_COUNT=`cat ${USB_POW_PATH}/wakeup_abort_count`
		WAKEUP_ACTIVE=`cat ${USB_POW_PATH}/wakeup_active`
		WAKEUP_ACTIVE_COUNT=`cat ${USB_POW_PATH}/wakeup_active_count`
		WAKEUP_COUNT=`cat ${USB_POW_PATH}/wakeup_count`
		WAKEUP_EXPIRE_COUNT=`cat ${USB_POW_PATH}/wakeup_expire_count`
		WAKEUP_LAST_TIME_MS=`cat ${USB_POW_PATH}/wakeup_last_time_ms`
		WAKEUP_MAX_TIME_MS=`cat ${USB_POW_PATH}/wakeup_max_time_ms`
		WAKEUP_PREVENT_SLEEP_TIME_MS=`cat ${USB_POW_PATH}/wakeup_prevent_sleep_time_ms`
		WAKEUP_TOTAL_TIME_MS=`cat ${USB_POW_PATH}/wakeup_total_time_ms`

		cat << __EOS__
USB${USB_MINOR_NUMBER}
	active_duration             : ${ACTIVE_DURATION}
	async                       : ${ASYNC}
	autosuspend                 : ${AUTOSUSPEND}
	autosuspend_delay_ms        : ${AUTOSUSPEND_DELAY_MS}
	connected_duration          : ${CONNECTED_DURATION}
	control                     : ${CONTROL}
	level (DEPRECATED)          : ${LEVEL}
	runtime_active_kids         : ${RUNTIME_ACTIVE_KIDS}
	runtime_active_time         : ${RUNTIME_ACTIVE_TIME}
	runtime_enabled             : ${RUNTIME_ENABLED}
	runtime_status              : ${RUNTIME_STATUS}
	runtime_suspended_time      : ${RUNTIME_SUSPENDED_TIME}
	runtime_usage               : ${RUNTIME_USAGE}
	wakeup                      : ${WAKEUP}
	wakeup_abort_count          : ${WAKEUP_ABORT_COUNT}
	wakeup_active               : ${WAKEUP_ACTIVE}
	wakeup_active_count         : ${WAKEUP_ACTIVE_COUNT}
	wakeup_count                : ${WAKEUP_COUNT}
	wakeup_expire_count         : ${WAKEUP_EXPIRE_COUNT}
	wakeup_last_time_ms         : ${WAKEUP_LAST_TIME_MS}
	wakeup_max_time_ms          : ${WAKEUP_MAX_TIME_MS}
	wakeup_prevent_sleep_time_ms: ${WAKEUP_PREVENT_SLEEP_TIME_MS}
	wakeup_total_time_ms        : ${WAKEUP_TOTAL_TIME_MS}
__EOS__

	done
}


function fn_control() {
	USB_DEVICE_NUMBER_LIST=(1 2 3 4 5)

	USB_POW_CONTROL=$1

	if [ $# -gt 1 ]; then
		VAR=`expr ${2}`
		if [ ${VAR} -ge 1 -a ${VAR} -le 5 ]; then
			USB_DEVICE_NUMBER_LIST=(${2})
		else
			echo "Invalid USB Device Number: $1"
			exit
		fi
	fi

	for USB_MINOR_NUMBER in ${USB_DEVICE_NUMBER_LIST[@]}
	do
		USB_POW_PATH="/sys/bus/usb/devices/usb${USB_MINOR_NUMBER}/power"
		USB_POW_CONTROL_DEV="${USB_POW_PATH}/control"
		echo $USB_POW_CONTROL > $USB_POW_CONTROL_DEV
	done
}



if [ $# -eq 0 ]; then
	fn_ls
	exit
fi

case $1 in
	"ls" ) fn_ls ${@:2} ;;

	# resume USB device and NOT allow autosuspend
	"on" ) fn_control on ${@:2} ;;
	# allow autoresume and autosuspend USB device
	"auto" ) fn_control auto ${@:2} ;;

	"help" ) fn_help ;;
	* ) echo "Invalid command: $1"
		fn_help
		;;
esac