#!/usr/bin/env bash
# This bashpower script is intended for ASUS gaming laptops, 2020-2022.
# It has only been tested on the 2020 Zephyrus G14 (GA401IV).
# Place in /etc/local.d/ and use in conjunction with OpenRC for best results.
# Be sure to add the "local" service to the default runlevel for this script to function.

# BEGIN DEFAULT SETTING DEFINITIONS
mkdir -p /usr/local/bashpower

## set default CPU governor to powersave
if [ ! -f /usr/local/bashpower/governor ] ; then
    echo powersave > /usr/local/bashpower/governor
fi

## set default battery charge limit to 80%
if [ ! -f /usr/local/bashpower/batt_limit ] ; then
    echo 80 > /usr/local/bashpower/batt_limit
fi

## set default screen brightness to 50%
if [ ! -f /usr/local/bashpower/screen_brightness ] ; then
    echo 50 > /usr/local/bashpower/screen_brightness
fi

## set default fan curve
if [ ! -f /usr/local/bashpower/fan_curve ] ; then
    echo '20:0 30:0 40:0 55:30 60:50 70:70 85:100 90:100' > /usr/local/bashpower/fan_curve
fi
# END DEFAULT SETTING DEFINITIONS

# import user settings
governor=$(< /usr/local/bashpower/governor)
batt_limit=$(< /usr/local/bashpower/batt_limit)
fan_curve=$(< /usr/local/bashpower/fan_curve)
#screen_brightness=$(< /usr/local/bashpower/screen_brightness)

# BEGIN BOOT OPERATIONS
## set cpu governor
for CPU in $(seq 0 $(($(nproc) - 1))); do
    echo $governor > /sys/devices/system/cpu/cpu"$CPU"/cpufreq/scaling_governor
done

## turn off keyboard backlight
echo 0 > /sys/class/leds/asus::kbd_backlight/brightness

## set screen brightness
#echo $screen_brightness > /sys/class/backlight/amdgpu_bl0/brightness

## set battery charge limit
echo "$batt_limit" > /sys/class/power_supply/BAT0/charge_control_end_threshold

## set to quiet profile with curve-based fan control
echo 2 > /sys/devices/platform/asus-nb-wmi/throttle_thermal_policy
echo 2 > /sys/devices/platform/asus-nb-wmi/hwmon/hwmon"$auto_dir"/pwm1_enable

## set manual fan curve
auto_dir=$(ls /sys/devices/platform/asus-nb-wmi/hwmon | awk 'FNR == 1 {print}' | cut -c6-)
curve_dir=$(ls /sys/devices/platform/asus-nb-wmi/hwmon | awk 'FNR == 2 {print}' | cut -c6-)
for POINT in $(seq 8); do
    IFS=':' read -ra CURVE <<< "$(echo "$fan_curve" | awk -v var="$POINT" '{print $var;}')"
    curve_temp=${CURVE[0]}
    curve_speed=$(echo "${CURVE[1]} * 255 / 100" | bc)
    echo $curve_temp > /sys/devices/platform/asus-nb-wmi/hwmon/hwmon"$curve_dir"/pwm1_auto_point"$POINT"_temp
    echo $curve_temp > /sys/devices/platform/asus-nb-wmi/hwmon/hwmon"$curve_dir"/pwm2_auto_point"$POINT"_temp
    echo $curve_speed > /sys/devices/platform/asus-nb-wmi/hwmon/hwmon"$curve_dir"/pwm1_auto_point"$POINT"_pwm
    echo $curve_speed > /sys/devices/platform/asus-nb-wmi/hwmon/hwmon"$curve_dir"/pwm2_auto_point"$POINT"_pwm
done

## enable manual fan curve
echo 1 > /sys/devices/platform/asus-nb-wmi/hwmon/hwmon"$curve_dir"/pwm1_enable
echo 1 > /sys/devices/platform/asus-nb-wmi/hwmon/hwmon"$curve_dir"/pwm2_enable
# END BOOT OPERATIONS