# -*- sh -*-
# vim:ft=sh:ts=8:sw=4:noet

AddConfigHandler HardwareTweaksOptions

###
## IBM ACPI
###

AddConfigHelp "IbmAcpi <boolean>" "Use the ibm_acpi kernel module to signal suspend progress."

# ibm_acpi proc directory
IBM_ACPI_PROC=/proc/acpi/ibm

# ibm_acpi LED control file
IBM_ACPI_LED=$IBM_ACPI_PROC/led

# ibm_acpi beep control
IBM_ACPI_BEEP=$IBM_ACPI_PROC/beep

IbmAcpiLed() {
    if [ -f "$IBM_ACPI_LED" ] ; then
	echo $1 $2 > $IBM_ACPI_LED
    else
	vecho 1 "File '$IBM_ACPI_LED' not found. Unable to signal LED."
    fi
}

IbmAcpiBeep() {
    if [ -f "$IBM_ACPI_BEEP" ] ; then
	echo $1 > $IBM_ACPI_BEEP
    else
	vecho 1 "File '$IBM_ACPI_BEEP' not found. Unable to emit beep."
    fi
}

IbmAcpiStartSuspend() {
    # blink suspend LED
    IbmAcpiLed 7 blink
    return 0 # this shouldn't stop suspending
}

IbmAcpiEndResume() {
    # turn off suspend LED
    IbmAcpiLed 7 off

    # audible failure if another scriplet failed
    [ $EXIT_CODE -gt 1 ] && IbmAcpiBeep 4

    return 0
}

###
## radeontool
###

AddConfigHelp "RadeonTool <boolean>" "Use radeontool to turn off LCD backlight."

RadeonToolBacklightOff() {
    if ! command -v radeontool > /dev/null 2>&1 ; then
	USE_RADEONTOOL=0
	vecho 1 "'radeontool' utility not found. Radeontool disabled."
	return 0
    fi

    radeontool light off || return 1

    return 0
}

RadeonToolBacklightOn() {
    [ x"$USE_RADEONTOOL" = "x1" ] || return 0

    radeontool light on || return 1

    return 0
}

###
## i915resolution
###

AddConfigHelp "Runi915resolution <boolean>" "Set to run 915resolution before switching back to X."

i915resolutionResume() {
    local action
    action=start
    [ "$DISTRIBUTION" = "gentoo" ] && action=restart
    /etc/init.d/915resolution $action || return 1
    return 0
}

###
## cpufreq maximiser
###

AddConfigHelp "FullSpeedCPU <boolean>" "Sets the CPU to full speed whilst suspending."

FullSpeedCPUSuspend() {
    local cpu
    HW_FULLSPEEDCPU_RESTORER=`mktemp /tmp/tmp.hibernate.XXXXXX`
    for cpu in /sys/devices/system/cpu/*/cpufreq ; do
	local cpunum min_freq setspeed governor i
	[ -d $cpu ] || continue

	# Find out if this CPU has been affected already.
	cpunum=${cpu#/sys/devices/system/cpu/cpu}
	cpunum=${cpunum%/cpufreq}
	if IsANumber $cpunum ; then
	    eval "done_this=\$hw_cpu_${cpunum}_done"
	    [ "x$done_this" = "xcpudone" ] && continue
	fi
	# Mark all affected CPUs as done
	for i in `cat $cpu/affected_cpus 2>/dev/null` ; do
	    IsANumber $i && eval "hw_cpu_${i}_done=cpudone"
	done

	# Backup what we have.
	max_freq=`cat $cpu/scaling_max_freq`
	min_freq=`cat $cpu/scaling_min_freq`
	[ -f "$cpu/scaling_setspeed" ] && setspeed=`cat $cpu/scaling_setspeed`
	governor=`cat $cpu/scaling_governor`
	cat <<EOT >> $HW_FULLSPEEDCPU_RESTORER
# Temporary file for hibernate script.
# If you're reading this then it's probably safe to delete.

echo $min_freq > $cpu/scaling_min_freq
echo $governor > $cpu/scaling_governor
[ -f "$cpu/scaling_setspeed" ] && echo "$setspeed" > $cpu/scaling_setspeed
EOT

	# Set governor to performance if we've got it
	grep -q performance $cpu/scaling_available_governors 2>/dev/null && \
	    echo performance > $cpu/scaling_governor
	# Set scaling_min_freq to scaling_max_freq
	echo $max_freq > $cpu/scaling_min_freq

	vecho 2 "Switched to performance, with min freq at $max_freq"
    done
    return 0
}

FullSpeedCPUResume() {
    [ -f "$HW_FULLSPEEDCPU_RESTORER" ] || return 0
    . "$HW_FULLSPEEDCPU_RESTORER"
    rm -f "$HW_FULLSPEEDCPU_RESTORER"
    return 0
}

###
## ACPI Video flags
###

AddConfigHelp "AcpiVideoS3Bios <boolean>" "Sets s3_bios mode, replaces acpi_sleep=s3_bios kernel parameter."
AddConfigHelp "AcpiVideoS3Mode <boolean>" "Sets s3_mode mode, replaces acpi_sleep=s3_mode kernel parameter."

ACPIVIDEO_FLAGS=0

AcpiVideoFlagsSuspend() {
    echo "${ACPIVIDEO_FLAGS}" > /proc/sys/kernel/acpi_video_flags
}

###
## Option handler for all of the above:
###

HardwareTweaksOptions() {
    case $1 in
	radeontool)
	    BoolIsOn "$1" "$2" || return 0
	    USE_RADEONTOOL=1
	    if [ -z "$RADEONTOOL_HOOKED" ] ; then
		AddSuspendHook 98 RadeonToolBacklightOff
		AddResumeHook 98 RadeonToolBacklightOn
		RADEONTOOL_HOOKED=1

		# Enable SwitchToTextMode too.
		XHacksOptions switchtotextmode 1
	    fi
	    ;;
	ibmacpi)
	    BoolIsOn "$1" "$2" || return 0
	    if [ -d $IBM_ACPI_PROC ] ; then
		USE_IBM_ACPI=1
	    else
		vecho 1 "Directory '$IBM_ACPI_PROC' not found. IbmAcpi disabled."
		return 0
	    fi
	    if [ -z "$IBM_ACPI_HOOKED" ] ; then
		# in call order
		AddSuspendHook 12 IbmAcpiStartSuspend
		AddResumeHook 12 IbmAcpiEndResume
		IBM_ACPI_HOOKED=1
	    fi
	    ;;
	runi915resolution)
	    BoolIsOn "$1" "$2" || return 0
	    if [ -z "$I915RESOLUTION_HOOKED" ] ; then
		# Needs to come before xhacks switches back to X.
		AddResumeHook 98 i915resolutionResume
		I915RESOLUTION_HOOKED=1

		# Enable SwitchToTextMode too.
		XHacksOptions switchtotextmode 1
	    fi
	    ;;
	fullspeedcpu)
	    BoolIsOn "$1" "$2" || return 0
	    if [ -z "$FULLSPEEDCPU_HOOKED" ] ; then
		AddSuspendHook 98 FullSpeedCPUSuspend
		AddResumeHook 98 FullSpeedCPUResume
		FULLSPEEDCPU_HOOKED=1
	    fi
	    ;;
	acpivideos3bios)
	    BoolIsOn "$1" "$2" || return 0
	    ACPIVIDEO_FLAGS=$((${ACPIVIDEO_FLAGS}+1))
	    if [ -z "$ACPIVIDEOFLAGS_HOOKED" ]; then
		    AddSuspendHook 12 AcpiVideoFlagsSuspend
		    ACPIVIDEOFLAGS_HOOKED=1
	    fi
	    ;;
	acpivideos3mode)
	    BoolIsOn "$1" "$2" || return 0
	    ACPIVIDEO_FLAGS=$((${ACPIVIDEO_FLAGS}+2))
	    if [ -z "$ACPIVIDEOFLAGS_HOOKED" ]; then
		    AddSuspendHook 12 AcpiVideoFlagsSuspend
		    ACPIVIDEOFLAGS_HOOKED=1
	    fi
	    ;;
	*)
	    return 1
    esac

    return 0
}

# $Id: hardware_tweaks 1196 2008-05-01 11:58:52Z nigel $