1#!/bin/bash 2# Copyright 2021 Google LLC 3# 4# Licensed under the Apache License, Version 2.0 (the "License"); 5# you may not use this file except in compliance with the License. 6# You may obtain a copy of the License at 7# 8# http://www.apache.org/licenses/LICENSE-2.0 9# 10# Unless required by applicable law or agreed to in writing, software 11# distributed under the License is distributed on an "AS IS" BASIS, 12# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13# See the License for the specific language governing permissions and 14# limitations under the License. 15 16source /usr/share/gpio-host-pwr/lib.sh || exit 17 18gpio_build_cache 10 "$HOST_GPIO_PGOOD" "$HOST_GPIO_PWR_BTN" || exit 19gpio_init "$HOST_GPIO_PGOOD" || exit 20 21# Set the power status LED 22if [ -n "$HOST_LED_PWR" ]; then 23 echo 'none' > /sys/class/leds/"$HOST_LED_PWR"/trigger || true 24 echo '255' > /sys/class/leds/"$HOST_LED_PWR"/brightness || true 25fi 26 27# Ensure the watchdog is available before the host starts 28host_pwr_start_watchdog || true 29 30# We don't want to do anything if the machine is already on 31pgood="$(gpio_get_value "$HOST_GPIO_PGOOD")" || exit 32if (( pgood == 1 )); then 33 echo 'Host is already running, doing nothing' >&2 34 exit 0 35fi 36 37# Do a quick push of the button if PGOOD 38echo "Starting host power" >&2 39rc=0 40gpio_set_value "$HOST_GPIO_PWR_BTN" 1 || rc=$? 41sleep 0.1 42gpio_set_value "$HOST_GPIO_PWR_BTN" 0 || rc=$? 43 44# Loop until we realize that host power is on 45# Limit the loop count to 10 seconds as we should never 46# have to wait this long for poweroff 47s=$SECONDS 48while true; do 49 if ! pgood="$(gpio_get_value "$HOST_GPIO_PGOOD")"; then 50 rc=1 51 break 52 fi 53 if (( pgood == 1 )); then 54 echo 'Host is now on' >&2 55 break 56 fi 57 if (( SECONDS - s > 10 )); then 58 echo 'Poweron timed out, terminating' >&2 59 rc=2 60 break 61 fi 62 sleep 0.1 63done 64 65exit $rc 66