Added the utility scripts

FunKey/board/funkey/rootfs-overlay/usr/local/sbin/brightness_get

@@ -0,0 +1,20 @@
+#!/bin/sh
+
+BRIGHTNESS_FILE="/etc/current_brightness"
+BRIGHTNESS_DEFAULT_VALUE=100
+
+# Sanity check: File does not exist
+if [ ! -f "${BRIGHTNESS_FILE}" ]; then
+    #echo "error:  \"${BRIGHTNESS_FILE}\" does not exist" >&2
+    echo ${BRIGHTNESS_DEFAULT_VALUE} > "${BRIGHTNESS_FILE}"
+fi
+
+# Sanity check: Check if integer
+brightness=$(cat "${BRIGHTNESS_FILE}")
+if ! [ "${brightness}" -ne "${brightness}" ] 2> /dev/null; then
+    #echo "error: \"${brightness}\" is not a number" >&2
+    echo ${BRIGHTNESS_DEFAULT_VALUE} > "${BRIGHTNESS_FILE}"
+    brightness=${BRIGHTNESS_DEFAULT_VALUE}
+fi
+echo ${brightness}
+exit 0

FunKey/board/funkey/rootfs-overlay/usr/local/sbin/brightness_get_sysfs

@@ -0,0 +1,7 @@
+#!/bin/sh
+
+SYSTEM_BRIGHTNESS="/sys/class/backlight/backlight/brightness"
+
+let brightness=$(cat "${SYSTEM_BRIGHTNESS}")*10-10
+echo ${brightness}
+exit 0

FunKey/board/funkey/rootfs-overlay/usr/local/sbin/brightness_set

@@ -0,0 +1,28 @@
+#!/bin/sh
+
+BRIGHTNESS_FILE="/etc/current_brightness"
+SYSTEM_BRIGHTNESS="/sys/class/backlight/backlight/brightness"
+
+# Check args
+if [ ${#} != 1 ]; then
+    echo "Usage: ${0} new_brightness_percentage"
+    exit 1
+fi
+
+# Check value's range
+if [ ${1} -gt 100 ]; then
+    echo "Usage: Wrong brightness percentage (${1}), must be between 0 and 100"
+    exit 1
+fi
+brightness_percentage=${1}
+
+# Set new brightness percentage
+let value=${1}+10
+let value/=10
+echo ${value} > "${SYSTEM_BRIGHTNESS}"
+
+# Set new brightness value in brightness file
+if [ ${?} -eq 0 ]; then
+    echo ${brightness_percentage} > "${BRIGHTNESS_FILE}"
+fi
+exit 0

FunKey/board/funkey/rootfs-overlay/usr/local/sbin/brightness_set_sysfs

@@ -0,0 +1,18 @@
+#!/bin/sh
+
+SYSTEM_BRIGHTNESS="/sys/class/backlight/backlight/brightness"
+
+if [ ${#} != 1 ]; then
+    echo "Usage: $0 new_brightness_percentage"
+    exit 1
+fi
+if [ ${1} -gt 100 ]; then
+    echo "Usage: Wrong brightness percentage (${1}), must be between 0 and 100"
+    exit 1
+fi
+
+# Set new brightness percentage
+let value=${1}+10
+let value/=10
+echo ${value} > "${SYSTEM_BRIGHTNESS}"
+exit 0

FunKey/board/funkey/rootfs-overlay/usr/local/sbin/display_notif_system_stats

@@ -0,0 +1,5 @@
+#!/bin/sh
+
+notif_set 0 "Getting system stats..."
+killall -s USR1 system_stats
+exit 0

FunKey/board/funkey/rootfs-overlay/usr/local/sbin/kill_emulators

@@ -0,0 +1,3 @@
+#!/bin/sh
+killall mednafen gpsp psnes pcsx sdlgnuboy PicoDriveBin
+exit 0

FunKey/board/funkey/rootfs-overlay/usr/local/sbin/low_bat_check

@@ -0,0 +1,124 @@
+#!/bin/sh
+
+# General constants declaration
+THRESHOLD_PERCENT_LOW_BAT=5
+THRESHOLD_PERCENT_EXTREMELY_LOW_BAT=2
+MAX_EXTREMELY_LOW_BAT_BEFORE_SHUTDOWN=5
+SLEEP_SECS=2
+RESCALE_MAX_PERCENTAGE=110
+
+# Blink Low bat constants declaration
+BLINK_ICON=0
+LOW_BAT_SECS_DISPLAYED=5
+LOW_BAT_SECS_NOT_DISPLAYED=5
+
+# Files and commands declaration
+USB_PRESENT_FILE="/sys/class/power_supply/axp20x-usb/present"
+#USB_PRESENT_FILE="/sys/class/power_supply/axp20x-ac/present" # Cheat for no USB present simulation when debugging
+BAT_PRESENT_FILE="/sys/class/power_supply/axp20x-battery/present"
+BAT_PERCENT_FILE="/sys/class/power_supply/axp20x-battery/capacity"
+BAT_PERCENT_RESCALED_FILE="/etc/current_battery_percentage"
+LOW_BAT_ICON="/sys/class/graphics/fb0/low_battery"
+SCHEDULE_SHUTDOWN_CMD="sched_shutdown"
+SIGNAL_URS1_TO_EMULATORS_CMD="signal_usr1_to_emulators"
+
+# Variables declaration
+low_bat_status=0
+low_bat_displayed=0
+cur_secs_disp=0
+cur_nb_extremely_low_bat_before_shutdown=0
+
+# Default: Hide Low Bat Icon
+eval ${ICON_HIDE_CMD}
+
+# Check low bat #
+while true; do
+    #echo "Bat present: "$(cat ${BAT_PRESENT_FILE})"
+    #echo "USB present: "$(cat ${USB_PRESENT_FILE})"
+    #echo "Bat percentage: "$(cat ${BAT_PERCENT_FILE})"
+
+    # Get current bat percentage here once
+    cur_bat_percent=$(cat "${BAT_PERCENT_FILE}")
+    #echo "cur_bat_percent = ${cur_bat_percent}"
+
+    # Rescale bat percentage between 0 and RESCALE_MAX_PERCENTAGE
+    bat_percent_rescaled=$(printf "%.f" $(echo $cur_bat_percent $RESCALE_MAX_PERCENTAGE | awk '{print $1*$2/100}'))
+    #echo "bat_percent_rescaled = ${bat_percent_rescaled}"
+
+    # Re-maximize to 100%
+    bat_percent_rescaled_maxed=$(( bat_percent_rescaled < 100 ? bat_percent_rescaled : 100 ))
+    #echo "bat_percent_rescaled_maxed = ${bat_percent_rescaled_maxed}"
+
+    # Save in file
+    echo ${bat_percent_rescaled_maxed} > "${BAT_PERCENT_RESCALED_FILE}"
+
+    # Low bat status detection
+    if [ "$(cat ${USB_PRESENT_FILE})" -eq "0" ]; then
+			
+	# Value of 0 means wrong i2c reading
+	if [ "${cur_bat_percent}" -ne "0" ]; then
+
+	    # Check if we must change state
+	    if [ "{$cur_bat_percent}" -le "${THRESHOLD_PERCENT_LOW_BAT}" -a "${low_bat_status}" -eq "0" ]; then
+
+		# Set Low Bat status
+		low_bat_status=1
+		low_bat_displayed=1
+		cur_secs_disp=0
+		echo 1 > "${LOW_BAT_ICON}"
+
+	    elif [ "${cur_bat_percent}" -gt "${THRESHOLD_PERCENT_LOW_BAT}" -a "${low_bat_status}" -eq "1" ]; then
+
+		# Reset status
+		low_bat_status=0
+		cur_nb_extremely_low_bat_before_shutdown=0
+		echo 0 > "${LOW_BAT_ICON}"
+	    fi
+	fi
+    else
+	if [ "${low_bat_status}" -eq "1" ]; then
+
+	    # Reset status
+	    low_bat_status=0
+	    cur_nb_extremely_low_bat_before_shutdown=0
+	    echo 0 > "${LOW_BAT_ICON}"
+	fi
+    fi
+
+    # Low bat processing
+    if [ "${low_bat_status}" -eq "1" ]; then
+
+	# Check extremely low bat for clean shutdown
+	if [ "${cur_bat_percent}" -le "${THRESHOLD_PERCENT_EXTREMELY_LOW_BAT}" ]; then
+	    let cur_nb_extremely_low_bat_before_shutdown++
+	    echo "cur_nb_extremely_low_bat_before_shutdown = ${cur_nb_extremely_low_bat_before_shutdown}"
+
+	    # Clean shutdown
+	    if [ "${cur_nb_extremely_low_bat_before_shutdown}" -ge  "${MAX_EXTREMELY_LOW_BAT_BEFORE_SHUTDOWN}" ]; then
+		echo "Battery extremely low, shutting down now..."
+		sched_shutdown 1 & signal_usr1_to_emulators
+		exit 0
+	    fi
+	fi
+
+	# Blinking process
+	if [ "${BLINK_ICON}" -eq "1" ]; then
+	    if [ "${low_bat_displayed}" -eq "1" -a "${cur_secs_disp}" -ge "${LOW_BAT_SECS_DISPLAYED}" ]; then
+		low_bat_displayed=0
+		cur_secs_disp=0
+		echo 0 > "${LOW_BAT_ICON}"
+	    elif [ "${low_bat_displayed}" -eq "0" -a "${cur_secs_disp}" -ge "${LOW_BAT_SECS_NOT_DISPLAYED}" ]; then
+		low_bat_displayed=1
+		cur_secs_disp=0
+		echo 1 > "${LOW_BAT_ICON}"
+	    fi
+	fi
+    fi
+
+    # Sleep before next check
+    sleep ${SLEEP_SECS}
+
+    # Increase vars
+    let cur_secs_disp+=${SLEEP_SECS}
+done
+exit 0

FunKey/board/funkey/rootfs-overlay/usr/local/sbin/notif_clear

@@ -0,0 +1,7 @@
+#!/bin/sh
+# Clear all current notifications
+
+NOTIFICATION_DISPLAY="/sys/class/graphics/fb0/notification"
+printf "clear" > "${NOTIFICATION_DISPLAY}"
+
+exit 0

FunKey/board/funkey/rootfs-overlay/usr/local/sbin/notif_disp

@@ -0,0 +1,38 @@
+#!/bin/sh
+# Display notification for a certain amount of time
+# Special char: ^ to add a new line
+# Set seconds to 0 to display indefinitely (until the next notif)
+
+NOTIFICATION_DISPLAY="/sys/class/graphics/fb0/notification"
+
+display_usage() { 
+    echo -e "Usage:\n$(basename ${0}) nb_seconds_display message_to_display\n" 
+} 
+ 
+# If less than two arguments supplied, display usage 
+if [  ${#} -le 1 ]; then 
+    echo "Display notification for a certain amount of time"
+    display_usage
+    exit 1
+fi 
+
+# Get number of seconds to display notif
+nb_secs=${1}
+if ! [ "${nb_secs}" -ne "${nb_secs}" ] 2> /dev/null; then
+    echo "error: \"${nb_secs}\" is not a number" >&2
+    exit 1
+fi
+
+# Print notif
+printf "${*:2}" > "${NOTIFICATION_DISPLAY}"
+
+# Clear notif if NB_SECS is not 0, otherwise never clear
+if [ "${nb_secs}" -ne "0" ]; then
+
+    # Wait time before clearing notif
+    sleep ${nb_secs}
+
+    # Clear notif
+    printf "clear" > "${NOTIFICATION_DISPLAY}"
+fi
+exit 0

FunKey/board/funkey/rootfs-overlay/usr/local/sbin/notif_set

@@ -0,0 +1,36 @@
+#!/bin/sh
+# Erase previous notif and display new one in background process for a certain amount of seconds
+# Special char: ^ to add a new line
+# Set seconds to 0 to display indefinitely (until the next notif_set)
+
+NOTIFICATION_DISPLAY="/sys/class/graphics/fb0/notification"
+
+display_usage() { 
+    echo -e "Usage:\n$(basename ${0}) nb_seconds_display message_to_display\n" 
+} 
+ 
+# If less than two arguments supplied, display usage 
+if [  $# -le 1 ]; then 
+    echo "Erase previous notif and display new one in background process for a certain amount of time"
+    echo "Special char: ^ to add a new line"
+    echo "Set seconds to 0 to display indefinitely (until the next $(basename ${0}))"
+    display_usage
+    exit 1
+fi
+
+# Get number of seconds to display notif
+nb_secs=${1}
+if ! [ "${nb_secs}" -ne "${nb_secs}" ]; then
+     echo "error: \"${nb_secs}\" is not a number" >&2
+     exit 1
+fi
+
+# Kill previous notif_disp process
+pkill notif_disp 2> /dev/null
+
+## Clear previous notif
+#printf "clear" > "${NOTIFICATION_DISPLAY}"
+
+# Print new notif
+notif_disp "$@" &
+exit 0

FunKey/board/funkey/rootfs-overlay/usr/local/sbin/quick_action_bright_down

@@ -0,0 +1,22 @@
+#!/bin/sh
+
+STEP_BRIGHTNESS=10
+NOTIF_TIME_ON=2
+
+# Get current value
+current_brightness=$(brightness_get)
+
+# Compute new brightness value
+new_brightness=0
+if [ "${current_brightness}" -gt "${STEP_BRIGHTNESS}" ]; then
+    let new_brightness=${current_brightness}-${STEP_BRIGHTNESS}
+fi
+
+# Change brightness
+if [ "${new_brightness}" -ne "${current_brightness}" ]; then
+	brightness_set ${new_brightness}
+fi
+
+# Notif
+notif_set ${NOTIF_TIME_ON} "       BRIGHTNESS: ${new_brightness}%%"
+exit 0

FunKey/board/funkey/rootfs-overlay/usr/local/sbin/quick_action_bright_up

@@ -0,0 +1,22 @@
+#!/bin/sh
+
+STEP_BRIGHTNESS=10
+NOTIF_TIME_ON=2
+
+# Get current value
+current_brightness=$(brightness_get)
+
+# Compute new brightness value
+new_brightness=${current_brightness}+${STEP_BRIGHTNESS}
+if [ "${new_brightness}" -gt "100" ]; then
+    new_brightness=100
+fi
+
+# Change brightness
+if [ "${new_brightness}" -ne "${current_brightness}" ]; then
+    brightness_set ${new_brightness}
+fi
+
+# Notif
+notif_set ${NOTIF_TIME_ON} "       BRIGHTNESS: ${new_brightness}%%"
+exit 0

FunKey/board/funkey/rootfs-overlay/usr/local/sbin/quick_action_volume_down

@@ -0,0 +1,22 @@
+#!/bin/sh
+
+STEP_VOLUME=10
+NOTIF_TIME_ON=2
+
+# Get current value
+current_volume=$(volume_get)
+
+# Compute new volume value
+new_volume=0
+if [ "${current_volume}" -gt "${STEP_VOLUME}" ]; then
+    new_volume=${current_volume}-${STEP_VOLUME}
+fi
+
+# Change volume
+if [ "${new_volume}" -ne "${current_volume}" ]; then
+    volume_set ${new_volume}
+fi
+
+# Notif
+notif_set ${NOTIF_TIME_ON} "         VOLUME: ${new_volume}%%"
+exit 0

FunKey/board/funkey/rootfs-overlay/usr/local/sbin/quick_action_volume_up

@@ -0,0 +1,22 @@
+#!/bin/sh
+
+STEP_VOLUME=10
+NOTIF_TIME_ON=2
+
+# Get current value
+current_volume=$(volume_get)
+
+# Compute new volume value
+new_volume=${current_volume}+${STEP_VOLUME}
+if [ "{new_$volume}" -gt "100" ]; then
+    new_volume=100
+fi
+
+# Change volume
+if [ "${new_volume}" -ne "{current_$volume}" ]; then
+    volume_set ${new_volume}
+fi
+
+# Notif
+notif_set ${NOTIF_TIME_ON} "         VOLUME: ${new_volume}%%"
+exit 0

FunKey/board/funkey/rootfs-overlay/usr/local/sbin/sched_shutdown

@@ -0,0 +1,15 @@
+#!/bin/sh
+
+if [ "${#}" != "1" ]; then
+    echo "Usage: $0	seconds_before_shutdown"
+    exit 1
+fi
+
+nb_secs_to_wait=$1
+
+# Wait $nb_secs_to_wait seconds to catch signal USR2
+# If the signal is caught, then it means a process canceled this shutdown
+sleep ${nbl_secs_to_wait}
+
+# Too late to cancel: init shutdown
+shutdown_funkey

FunKey/board/funkey/rootfs-overlay/usr/local/sbin/shutdown_funkey

@@ -0,0 +1,22 @@
+#!/bin/sh
+
+# Notif fullscreen "Shutting down"
+notif_set 0 "^^^^^^^^      SHUTTING DOWN...^^^^^^^^"
+
+# Kill Emulators
+#kill_emulators >/dev/null 2>&1
+
+# Kill Retrofe
+#pkill retrofe
+
+# Sync filesystems (useful in case poweroff could not finish)
+sync
+
+# Unmount Roms partition
+umount /mnt
+
+# Shutdown amp
+start_audio_amp 0 >/dev/null 2>&1
+
+# Poweroff
+poweroff

FunKey/board/funkey/rootfs-overlay/usr/local/sbin/signal_usr1_to_emulators

@@ -0,0 +1,6 @@
+#!/bin/sh
+# This should replaced by storing the correct PID before 
+# launching an emulator and signaling only this one.
+
+killall -s USR1 mednafen gpsp psnes pcsx sdlgnuboy PicoDriveBin >/dev/null 2>&1
+exit 0

FunKey/board/funkey/rootfs-overlay/usr/local/sbin/start_audio_amp

@@ -0,0 +1,31 @@
+#!/bin/sh
+
+# Check number of args
+if [ "${#}" -ne "1" ]; then
+    echo "Usage: $0 [1 for on, 0 for off]"
+    exit 1
+fi
+
+# Check Enable arg
+enable=$1
+if [ "${enable}" -eq "1" ]; then
+    echo "Turning ampli ON"
+elif [ "${enable}" -eq "0" ]; then
+    echo "Turning ampli OFF"
+else
+    echo "Usage: ${0} [1 for on, 0 for off]"
+    exit 1
+fi
+
+# PA enable GPIO
+GPIO_PF6=166
+
+# Export GPIO
+if [ ! -d "/sys/class/gpio/gpio${GPIO_PF6}" ]; then
+    echo ${GPIO_PF6} > "/sys/class/gpio/export"
+fi
+
+# Enable/disable cmd
+echo "out" > "/sys/class/gpio/gpio${GPIO_PF6}/direction"
+echo ${enable} > "/sys/class/gpio/gpio${GPIO_PF6}/value"
+exit 0

FunKey/board/funkey/rootfs-overlay/usr/local/sbin/start_gpio_manager

@@ -0,0 +1,12 @@
+#!/bin/sh
+
+LOCK_FILE="/var/lock/gpio_manager.lock"
+
+if [ -f "${LOCK_FILE}" ]; then
+    echo "${LOCK_FILE} already exists"
+    exit 1
+fi
+touch "${LOCK_FILE}"
+funkey_gpio_management
+rm "${LOCK_FILE}"
+exit 0

FunKey/board/funkey/rootfs-overlay/usr/local/sbin/start_launcher

@@ -0,0 +1,43 @@
+#!/bin/sh
+
+LOCK_FILE="/var/lock/launcher.lock"
+PREVENT_LAUNCHER_FILE="/mnt/prevent_launcher"
+PREVENT_LAUNCHER_FILE2="/boot/prevent_launcher"
+
+if [ -f "${LOCK_FILE}" ]; then
+    echo "${LOCK_FILE} already exists"
+    exit 1
+fi
+touch "${LOCK_FILE}"
+
+# Launch Previous Game
+QUICK_LOAD_FILE="/root/quick_load_cmd"
+if [ -f "${QUICK_LOAD_FILE}" ]; then
+    command=$(cat "${QUICK_LOAD_FILE}")
+    echo "Found quick load file, restarting previous game with command:"
+    echo ${command}
+    rm "${QUICK_LOAD_FILE}"
+    eval ${command}
+    termfix_all
+fi
+
+# Loop to launch launcher indefinitely
+while true; do
+	
+    # Check if prevent launcher file present
+    if [ -f "${PREVENT_LAUNCHER_FILE}" ]; then
+	echo "Found file: ${PREVENT_LAUNCHER_FILE}, not launching launcher" 
+	sleep 5
+    elif [ -f "${PREVENT_LAUNCHER_FILE2}" ]; then
+	echo "Found file: ${PREVENT_LAUNCHER_FILE2}, not launching launcher" 
+	sleep 5
+    else
+	# Launch Retrofe
+	retrofe
+
+	# In case retrofe quits with errors, clear graphic VT
+	termfix_all
+    fi
+done
+rm "${LOCK_FILE}"
+exit 0

FunKey/board/funkey/rootfs-overlay/usr/local/sbin/system_stats

@@ -0,0 +1,37 @@
+#!/bin/sh
+
+UPDATE_PERIOD=2 #seconds
+notif_dirty=0
+perform=0
+
+# USR1 callback
+function toggle_perform()
+{
+    let perform=1-${perform}
+    if [ "${perform}" -eq "0" ]; then
+    	notif_clear
+        notif_dirty=1
+    fi
+}
+trap toggle_perform SIGUSR1
+
+while true; do
+    if [ "${perform}" -eq "1" ]; then
+
+	# Compute stats
+	cpu=$(printf "%.1f\n" $(mpstat -P ALL $UPDATE_PERIOD 1 | tail -1 | awk '{print 100-$12}'))
+	ram_mem=$(printf "%.1f\n" $(free | grep Mem | awk '{print $3/$2 * 100.0}'))
+	ram_swap=$(printf "%.1f\n" $(free | grep Swap | awk '{print $3/$2 * 100.0}'))
+
+	# Notif
+	if [ "${notif_dirty}" == "1" ]]; then
+	    notif_clear
+	    notif_dirty=0
+	else
+	    notif_set 0 "CPU:${cpu}%% RAM:${ram_mem}%% SWAP:${ram_swap}%%"
+	fi
+    else
+	sleep ${UPDATE_PERIOD}
+    fi
+done
+exit 0

FunKey/board/funkey/rootfs-overlay/usr/local/sbin/termfix_all

@@ -0,0 +1,6 @@
+#!/bin/sh
+
+for i in $(seq 0 11); do
+	termfix /dev/tty$i
+done
+exit 0

FunKey/board/funkey/rootfs-overlay/usr/local/sbin/upgrade_fk_incremental

@@ -0,0 +1,257 @@
+#!/bin/sh
+
+#########################
+# Functions declaration #
+#########################
+notif_system_corruption () {
+	local time_on_screen=30
+	local reason=""
+
+	if [[ "$#" -ge "1" ]]; then
+		time_on_screen=$1
+	fi
+	if [[ "$#" -ge "2" ]]; then
+		reason=$2
+	fi
+
+  	notif_set $time_on_screen "^YOUR SYSTEM IS CORRUPTED:^$reason^^PLEASE REFLASH YOUR SD CARD"
+}
+
+exit_with_reason () {
+	local reason=$EXIT_CODE_FAILURE
+	
+	# Check args
+	if [[ "$#" -ge "1" ]]; then
+		reason=$1
+	fi
+
+	echo "EXIT FAILURE $EXIT_CODE_FAILURE, check log file"
+
+	# Remove extraction folder
+	if [[ -d $EXTRACT_DIRECTORY ]]; then
+		echo "Removing extraction directory: $EXTRACT_DIRECTORY" >> $LOG_FILE_UPGRADE
+		rm -rf $EXTRACT_DIRECTORY
+	fi
+
+	# Copy log file to UPGRADE_ARCHIVES_DIRECTORY
+	cp "$LOG_FILE_UPGRADE" "$LOG_FILE_UPGRADE_COPY"
+
+  	exit $reason
+}
+
+exit_failure () {
+  	exit_with_reason $EXIT_CODE_FAILURE
+}
+
+get_targz_uncompressed_size () { 
+	# check arg
+	if [[ "$#" != "1" ]]; then
+		extracted_size=0
+		return 1
+	fi
+
+	extracted_size=$(tar tzvf "$1" | sed 's/ \+/ /g' | cut -f3 -d' ' | sed '2,$s/^/+ /' | paste -sd' ' | bc)
+  	return 0
+}
+
+################
+# Exit reasons #
+################
+EXIT_CODE_SUCCESS=0
+EXIT_CODE_FAILURE=1
+EXIT_CODE_FAILURE_NO_VERSION=2
+EXIT_CODE_FAILURE_WRONG_VERSION=3
+EXIT_CODE_FAILURE_WRONG_TAR_GZ=4
+EXIT_CODE_FAILURE_WRONG_MD5=5
+EXIT_CODE_FAILURE_WRONG_EXTRACT_SIZE=6
+EXIT_CODE_FAILURE_NO_SPACE=7
+EXIT_CODE_FAILURE_EXTRACT_FAILED=8
+EXIT_CODE_FAILURE_SCRIPT_NOT_FOUND=9
+
+#####################
+# Files declaration #
+#####################
+FUNKEY_VERSION_FILE="/etc/funkey_version"
+UPGRADE_ARCHIVES_DIRECTORY="/mnt/"
+EXTRACT_DIRECTORY=$UPGRADE_ARCHIVES_DIRECTORY/update_tmp
+LOG_FILES_DIRECTORY="/usr/local/etc/upgrade_logs/"
+LOG_FILE_UPGRADE="$LOG_FILES_DIRECTORY/upgrade_log_$(date +%m-%d-%y_%T).txt"
+LOG_FILE_UPGRADE_COPY="$UPGRADE_ARCHIVES_DIRECTORY/upgrade_log.txt"
+
+####################
+# Vars declaration #
+####################
+upgrade_needed=0
+upgrade_error=0
+extracted_size=0
+
+###################
+# Process Upgrade #
+###################
+# Init log files
+mkdir -p $LOG_FILES_DIRECTORY
+echo -e "******* Upgrade Incremental FunKey, $(date) *******\n" > $LOG_FILE_UPGRADE
+test -f $LOG_FILE_UPGRADE_COPY && rm $LOG_FILE_UPGRADE_COPY
+
+# Get current FunKey version
+if [[ -f $FUNKEY_VERSION_FILE ]]; then	
+	FUNKEY_VERSION=$(cat $FUNKEY_VERSION_FILE)
+
+	# Check if positive number (float or integer)
+	if [[ "$FUNKEY_VERSION" != ^[+-]?[0-9]*$ ]];then
+		echo "Current FunKey version = $FUNKEY_VERSION" >> $LOG_FILE_UPGRADE
+	elif [[ "$FUNKEY_VERSION" != ^[+-]?[0-9]+\.?[0-9]*$ ]];then
+		echo "Current FunKey version = $FUNKEY_VERSION" >> $LOG_FILE_UPGRADE
+	else
+		echo "WRONG FUNKEY VERSION FOUND: $FUNKEY_VERSION !" >> $LOG_FILE_UPGRADE
+
+		# Notif
+		notif_system_corruption 20 "WRONG VERSION: $FUNKEY_VERSION"
+		
+		# Exit failure
+		upgrade_error=1	
+		exit_with_reason $EXIT_CODE_FAILURE_NO_VERSION
+	fi
+
+else
+	echo "NO FUNKEY VERSION FOUND !" >> $LOG_FILE_UPGRADE
+
+	# Notif
+	notif_system_corruption 20 "NO VERSION"
+	
+	# Exit failure
+	upgrade_error=1
+	exit_with_reason $EXIT_CODE_FAILURE_WRONG_VERSION
+fi
+
+# Check if upgrade file is present
+upgrade_archive=$(ls -v $UPGRADE_ARCHIVES_DIRECTORY/upgrade_funkey_${FUNKEY_VERSION}_to_*.tar.gz 2> /dev/null | head -1)
+other_upgrade_archives=$(ls $UPGRADE_ARCHIVES_DIRECTORY/upgrade_funkey_*.tar.gz 2> /dev/null)
+if [[ ! -z "$upgrade_archive" ]]; then
+    echo -e "Upgrade archive found:\n	$upgrade_archive" >> $LOG_FILE_UPGRADE
+    #echo -e "Upgrade archive found:\n	$upgrade_archive"
+    upgrade_needed=1
+elif [[ ! -z "$other_upgrade_archives" ]]; then
+    echo -e "Other upgrades files found:\n	$other_upgrade_archives" >> $LOG_FILE_UPGRADE
+else
+    echo "No upgrade files found" >> $LOG_FILE_UPGRADE
+fi
+
+if [[ "$upgrade_needed" == "1" ]]; then
+	
+	# Check if tar.gz file is valid
+	tar_gz_file_list=$(tar -tzf "$upgrade_archive" 2>/dev/null)
+	tar_gz_validity=$?
+	if [[ "$tar_gz_validity" != "0" ]]; then 
+		echo "WRONG TAR.GZ FILE" >> $LOG_FILE_UPGRADE
+		exit_with_reason $EXIT_CODE_FAILURE_WRONG_TAR_GZ
+	else
+		echo -e "\nList of files in archive:"  >> $LOG_FILE_UPGRADE
+		echo $tar_gz_file_list  >> $LOG_FILE_UPGRADE
+		echo -e "\n" >> $LOG_FILE_UPGRADE
+	fi
+
+	# Check if archive integrity is ok
+	file_no_ext=${upgrade_archive%.tar.gz}
+	md5_read=${file_no_ext##*_}
+	echo "MD5 read from file: $md5_read" >> $LOG_FILE_UPGRADE
+	md5_computed=$(md5sum $upgrade_archive | cut -d' ' -f1)
+	echo "MD5 computed from file: $md5_computed" >> $LOG_FILE_UPGRADE
+
+	if [[ "$md5_read" != "$md5_computed" ]]; then
+		echo "WRONG MD5" >> $LOG_FILE_UPGRADE
+		exit_with_reason $EXIT_CODE_FAILURE_WRONG_MD5
+	fi
+
+	# Get size of uncompressed data
+	get_targz_uncompressed_size "$upgrade_archive"
+	if [[ $extracted_size == "0" ]]; then
+		echo "CANNOT COMPUTE EXTRACTED SIZE" >> $LOG_FILE_UPGRADE
+		exit_with_reason $EXIT_CODE_FAILURE_WRONG_EXTRACT_SIZE
+	fi
+	echo "Extracted archive size: $extracted_size" >> $LOG_FILE_UPGRADE
+	
+	# Check if enough space in /mnt for extraction
+	free_space=$(($(stat -f --format="%a*%S" $UPGRADE_ARCHIVES_DIRECTORY)))
+	echo "Free space in $UPGRADE_ARCHIVES_DIRECTORY: $free_space" >> $LOG_FILE_UPGRADE
+	if [[ "$free_space" -le "$extracted_size" ]]; then
+		missing_space=$(echo "$extracted_size - $free_space" | bc )
+		format_missing_space=$(numfmt --to=iec --suffix=B $missing_space)
+		echo "NOT ENOUGH FREE SPACE FOR EXTRACTION, MISSING $format_missing_space" >> $LOG_FILE_UPGRADE
+		echo "NOT ENOUGH FREE SPACE FOR EXTRACTION, MISSING $format_missing_space"
+
+		notif_set 20 "^NOT ENOUGH SPACE FOR UPDATE^PLEASE FREE $format_missing_space"
+
+		exit_with_reason $EXIT_CODE_FAILURE_NO_SPACE
+	fi
+
+	# Remove and create extraction folder
+	if [[ -d $EXTRACT_DIRECTORY ]]; then
+		echo "Removing extraction directory: $EXTRACT_DIRECTORY" >> $LOG_FILE_UPGRADE
+		rm -rf $EXTRACT_DIRECTORY
+	fi
+	mkdir $EXTRACT_DIRECTORY
+
+	# Notif before achive extraction
+	notif_set 0 "^^^^^^^    UPGRADE IN PROGRESS... ^      EXTRACTING FILES^^DO NOT TURN OFF THE CONSOLE! ^^^^^^"
+
+	# Extract archive
+	echo "Extracting to directory: $EXTRACT_DIRECTORY" >> $LOG_FILE_UPGRADE
+	tar xzf $upgrade_archive -C $EXTRACT_DIRECTORY 2> /dev/null
+	if [[ "$?" != "0" ]]; then
+		echo "EXTRACTION FAILED" >> $LOG_FILE_UPGRADE
+		exit_with_reason EXIT_CODE_FAILURE_EXTRACT_FAILED
+	fi
+
+	echo "Extracted directory content:" >> $LOG_FILE_UPGRADE
+	ls $EXTRACT_DIRECTORY >> $LOG_FILE_UPGRADE
+
+	# Check for update script
+	upgrade_script=$(ls $EXTRACT_DIRECTORY/launch_upgrade.sh 2> /dev/null | head -1)
+	if [[ -z "$upgrade_script" ]]; then
+	    echo -e "UPGRADE SCRIPT NOT FOUND" >> $LOG_FILE_UPGRADE
+	    echo -e "UPGRADE SCRIPT NOT FOUND"
+
+	    notif_set 20 "^UPDATE FAILED:^SCRIPT NOT FOUND^^WRONG UPGRADE FILE"
+	    exit_with_reason EXIT_CODE_FAILURE_SCRIPT_NOT_FOUND
+	fi
+
+	# Display notif before launching script
+	notif_set 0 "^^^^^^^    UPGRADE IN PROGRESS... ^$(basename "$upgrade_archive")^^DO NOT TURN OFF THE CONSOLE! ^^^^^^"
+
+	# Launch upgrade script
+	echo -e "Launching upgrade script" >> $LOG_FILE_UPGRADE
+	chmod 777 $upgrade_script
+	$upgrade_script "$LOG_FILE_UPGRADE"
+	if [[ "$?" != "0" ]]; then
+		echo -e "UPGRADE SCRIPT FAILURE" >> $LOG_FILE_UPGRADE
+		exit_failure
+	fi
+	echo -e "Upgrade script successfull" >> $LOG_FILE_UPGRADE
+
+	# Remove upgrade archive
+	echo -e "Remove upgrade archive" >> $LOG_FILE_UPGRADE
+	rm $upgrade_archive
+
+	# Remove and create extraction folder
+	if [[ -d $EXTRACT_DIRECTORY ]]; then
+		echo "Removing extraction directory: $EXTRACT_DIRECTORY" >> $LOG_FILE_UPGRADE
+		rm -rf $EXTRACT_DIRECTORY
+	fi
+
+	# Notif upgrade successfull
+	notif_set 0 "^^^^^^^^      UPGRADE SUCCESSFUL^        REBOOTING NOW^^^^^^^"
+	sleep 2
+	notif_clear
+
+	# Reboot FunKey
+	reboot
+fi
+
+# If no upgrade, remove log file
+if [[ "$upgrade_needed" == "0" && "$upgrade_error" == "0" ]]; then
+	rm $LOG_FILE_UPGRADE
+fi
+
+# Exit success
+exit $EXIT_CODE_SUCCESS

FunKey/board/funkey/rootfs-overlay/usr/local/sbin/volume_get

@@ -0,0 +1,20 @@
+#!/bin/sh
+
+VOLUME_FILE="/etc/current_volume"
+VOLUME_DEFAULT_VALUE=50
+
+# Sanity check: File does not exist
+if [ ! -f "${VOLUME_FILE}" ]; then
+	#echo "error: \"${VOLUME_FILE}\" does not exist" >&2
+	echo ${VOLUME_DEFAULT_VALUE} > "${VOLUME_FILE}"
+fi
+
+# Sanity check: Check if integer
+volume=$(cat "${VOLUME_FILE}")
+if ! [ "${volume}" -ne "${volume}" ] ; then
+   	#echo "error: \"${volume}\" is not a number" >&2
+	echo ${VOLUME_DEFAULT_VALUE} > "${VOLUME_FILE}"
+	volume=${VOLUME_DEFAULT_VALUE}
+fi
+echo ${volume}
+exit 0

FunKey/board/funkey/rootfs-overlay/usr/local/sbin/volume_get_alsa

@@ -0,0 +1,4 @@
+#!/bin/sh
+
+amixer sget 'Headphone' | tail -1 | cut -d' ' -f7 | sed 's/[^0-9]//g'
+exit 0

FunKey/board/funkey/rootfs-overlay/usr/local/sbin/volume_set

@@ -0,0 +1,45 @@
+#!/bin/sh
+
+VOLUME_FILE="/etc/current_volume"
+
+# Check args
+if [ ${#} != 1 ]; then
+    echo "Usage: ${0} new_volume_percentage"
+    exit 1
+fi
+
+# Check value's range
+if [ ${1} -gt 100 ]; then
+    echo "Usage: Wrong volume percentage (${1}), must be between 0 and 100"
+    exit 1
+fi
+
+# Scale new volume value between 0 and 63
+volume_percent=${1}
+volume_integer=$(echo ${volume_percent} 63 100 | awk '{printf int($1*$2/$3)}')
+volume_decimal=$(echo ${volume_percent} 63 100 ${volume_integer} | awk '{printf (($1*$2/$3)-$4)*100}')
+if [ "${volume_decimal}" -ge "63" ]; then
+	let volume_integer++
+fi
+volume_scaled=${volume_integer}
+
+# Get current value
+current_volume=$(volume_get)
+
+# Turn on/off ampli if necessary
+if [ "${current_volume}" -eq "0" -a "${volume_scaled}" -ne "0" ]; then
+    echo "Turning AMP on"
+    start_audio_amp 1
+elif [ "${current_volume}" -ne "0" -a "${volume_scaled}" -eq "0" ]; then
+    echo "Turning AMP off"
+    start_audio_amp 0
+fi
+
+# Set new volume
+amixer -q sset 'Headphone' ${volume_scaled} unmute
+
+# Change new volume value in volume file
+if [ ${?} -eq 0 ]; then
+    echo ${volume_percent} > "${VOLUME_FILE}"
+fi
+exit 0

FunKey/board/funkey/rootfs-overlay/usr/local/sbin/volume_set_alsa

@@ -0,0 +1,38 @@
+#!/bin/sh
+
+# Check args
+if [ ${#} != 1 ]; then
+    echo "Usage: ${0} new_volume_percentage"
+    exit 1
+fi
+
+# Check value's range
+if [ ${1} -gt 100 ]; then
+    echo "Usage: Wrong volume percentage (${1}), must be between 0 and 100"
+    exit 1
+fi
+
+# Scale new volume value between 0 and 63
+volume_percent=${1}
+volume_integer=$(echo ${volume_percent} 63 100 | awk '{printf int($1*$2/$3)}')
+volume_deccimal=$(echo ${volume_percent} 63 100 ${volume_integer} | awk '{printf (($1*$2/$3)-$4)*100}')
+if [ "{$volume_decimal}" -ge "63" ]; then
+    let volume_integer++
+fi
+volume_scaled=${volume_integer}
+
+# Get current value
+current_volume=$(volume_get)
+
+# Turn on/off ampli if necessary
+if [ "${current_volume}" -eq "0" -a "${volume_scaled}" -ne "0" ]; then
+    echo "Turning AMP on"
+    start_audio_amp 1
+elif [ "${current_volume}" -ne "0" -a "${volume_scaled}" -eq "0" ]; then
+    echo "Turning AMP off"
+    start_audio_amp 0
+fi
+
+# Set new volume
+amixer -q sset 'Headphone' ${volume_scaled} unmute
+exit 0

FunKey/board/funkey/rootfs-overlay/usr/local/sbin/write_args_quick_load_file

@@ -0,0 +1,17 @@
+#!/bin/sh
+
+# Write quick load file args
+QUICK_LOAD_FILE="/root/quick_load_cmd"
+
+printf "" > $QUICK_LOAD_FILE
+
+whitespace="[[:space:]]"
+for i in "$@"; do
+    if [[ "$i" != $whitespace && "$i" != "SDL_NOMOUSE=1" ]]
+    then
+        i=\""$i"\"
+    fi
+    printf "%s" "$i " >> $QUICK_LOAD_FILE
+done
+printf "\n" >> $QUICK_LOAD_FILE
+exit 0