tdepowersave/src/hardware.cpp

 /**************************************************************************
 *   Copyright (C) 2006-2007 by Danny Kukawka                              *
 *                              <dkukawka@suse.de>, <danny.kukawka@web.de> *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of version 2 of the GNU General Public License     *
 *   as published by the Free Software Foundation.                         *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.             *
 ***************************************************************************/

/*!
 * \file 	hardware.cpp
 * \brief 	In this file can be found the hardware information related code.
 * \author 	Danny Kukawka, <dkukawka@suse.de>, <danny.kukawka@web.de>
 * \date    	2006-2007
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

// include global header
#include <fcntl.h>

// include QT header
#include <tqtimer.h>
#include <tqdir.h>

// keycode definitions
#include <linux/input.h>

// include own header
#include "hardware.h"
#include "tdepowersave_debug.h"

// #define USE_EVENT_DEVICES_DIRECTLY 1

/*! The default constructor of the class HardwareInfo */
HardwareInfo::HardwareInfo() {
	kdDebugFuncIn(trace);

	// init members
	acadapter = true;
	lidclose = false;
	laptop = false;
	brightness = false;
	brightness_in_hardware = false;
	sessionIsActive = true;	 // assume as first we are active

	// initialize connection to the TDE hardware library
	m_hwdevices = TDEGlobal::hardwareDevices();
	connect(m_hwdevices, TQT_SIGNAL(hardwareUpdated(TDEGenericDevice*)), this, TQT_SLOT(processHardwareChangedEvent(TDEGenericDevice*)));

#ifdef USE_EVENT_DEVICES_DIRECTLY
	connect(m_hwdevices, TQT_SIGNAL(eventDeviceKeyPressed(unsigned int, TDEEventDevice*)), this, TQT_SLOT(processKeyPressEvent(unsigned int, TDEEventDevice*)));
#endif

	// update everything the first time
	update_info_ac_changed = true;
	update_info_cpufreq_policy_changed = true;
	update_info_primBattery_changed = true;

	currentCPUFreqPolicy = UNKNOWN_CPUFREQ;
	primaryBatteriesWarnLevel = 12;
	primaryBatteriesLowLevel = 7;
	primaryBatteriesCriticalLevel = 2;

	allUDIs = TQStringList();
	consoleKitSession = TQString();
	BatteryList.setAutoDelete( true ); // the list owns the objects

	primaryBatteries = new BatteryCollection(BAT_PRIMARY);
	setPrimaryBatteriesWarningLevel(); // force default settings

	// connect to D-Bus
	dbus_iface = new dbusInterface();
	sessionIsActive = dbus_iface->checkActiveSession();
	connect(dbus_iface, TQT_SIGNAL(activeSessionChanged(bool)), this, TQT_SLOT(handleSessionState(bool)));

	checkPowermanagement();
	checkIsLaptop();
	checkBrightness();
	checkCPUFreq();
	checkSuspend();
	intialiseHWInfo();

	updatePrimaryBatteries();

	kdDebugFuncOut(trace);
}

/*! The default desctuctor of the class HardwareInfo */
HardwareInfo::~HardwareInfo() {
	kdDebugFuncIn(trace);

	kdDebugFuncOut(trace);
}

/*!
 * This funtion is used to reinit all hardware information.
 * \return 		Boolean with result of the call
 * \retval true		if reinit HW infos correct
 * \retval false	if not
 */
bool HardwareInfo::reinitHardwareInfos () {
	kdDebugFuncIn(trace);

	/* first cleanup */
	acadapter = true;
	lidclose = false;
	laptop = false;
	brightness = false;
	has_APM = false;
	has_ACPI = false;

	update_info_ac_changed = true;
	update_info_cpufreq_policy_changed = true;
	update_info_primBattery_changed = true;

	allUDIs = TQStringList();

	BatteryList.clear();
	primaryBatteries = new BatteryCollection(BAT_PRIMARY);

	/* reinit hardware data */
	checkPowermanagement();
	checkIsLaptop();
	checkBrightness();
	checkCPUFreq();
	checkSuspend();
	intialiseHWInfo();
	updatePrimaryBatteries();

	kdDebugFuncOut(trace);
	return true;
}


/*!
 * \b TQT_SLOT called if the state of the current session change
 * \param state boolean represent the state of the session
 */
void HardwareInfo::handleSessionState( bool state ) {
    if( state != sessionIsActive ) {
	sessionIsActive = state;
	TQTimer::singleShot(50, this, TQT_SLOT(emitSessionActiveState()));
    }
}

/*!
 * This function is used to parse changed hardware nofifications from the TDE hardware library
 * \param device 	a \ref TDEGenericDevice* which should be processed
 */
void HardwareInfo::processHardwareChangedEvent (TDEGenericDevice* device) {
	kdDebugFuncIn(trace);

	if (allUDIs.contains( device->uniqueID() )) {
		if (device->type() == TDEGenericDeviceType::PowerSupply) {
			TQTimer::singleShot(50, this, TQT_SLOT(checkACAdapterState()));
		} else if (device->type() == TDEGenericDeviceType::Battery) {
			// this is a battery event
			updateBatteryValues(device);
		} else if (device->type() == TDEGenericDeviceType::Event) {
			TDEEventDevice* edevice = dynamic_cast<TDEEventDevice*>(device);
			if (edevice) {
				if (edevice->eventType() == TDEEventDeviceType::ACPILidSwitch) {
					TQTimer::singleShot(50, this, TQT_SLOT(checkLidcloseState()));
				}
			}
		} else if (device->type() == TDEGenericDeviceType::Backlight) {
			TQTimer::singleShot(50, this, TQT_SLOT(checkBrightness()));
		}
		// TODO: add needed code
	} else {
		kdDebug() << "unmonitored device changed: " << device->uniqueID() << endl;
	}

	kdDebugFuncOut(trace);
}

/*!
 * This funtion is used to parse changed hardware nofifications from the TDE hardware library
 * \param keycode 	a keycode which should be processed
 * \param edevice 	the \ref TDEEventDevice* from whence the keypress originated
 */
void HardwareInfo::processKeyPressEvent(unsigned int keycode, TDEEventDevice* edevice) {
	kdDebugFuncIn(trace);

	// FIXME
	// How can I get specific button press/release information (instead of just "something happened to the button") from the TDE hardware library?
		kdDebug() << "ButtonPressed event from TDE HW library " << endl;
		if (((edevice->eventType() == TDEEventDeviceType::ACPIPowerButton) || (edevice->eventType() == TDEEventDeviceType::ACPIOtherInput))
			&& (keycode == KEY_POWER)) {
			TQTimer::singleShot(50, this, TQT_SLOT(emitPowerButtonPressed()));
		} else if (((edevice->eventType() == TDEEventDeviceType::ACPISuspendButton) || (edevice->eventType() == TDEEventDeviceType::ACPIOtherInput))
			&& (keycode == KEY_SLEEP)) {
			TQTimer::singleShot(50, this, TQT_SLOT(emitSuspendButtonPressed()));
		} else if (((edevice->eventType() == TDEEventDeviceType::ACPISuspendButton) || (edevice->eventType() == TDEEventDeviceType::ACPIOtherInput))
			&& (keycode == KEY_SUSPEND)) {
			TQTimer::singleShot(50, this, TQT_SLOT(emitS2diskButtonPressed()));
// 		} else if (value.startsWith("brightness-")) {
// 			if (!brightness_in_hardware && value.endsWith("-up"))
// 				TQTimer::singleShot(50, this, TQT_SLOT(brightnessUpPressed()));
// 			else if (!brightness_in_hardware && value.endsWith("-down"))
// 				TQTimer::singleShot(50, this, TQT_SLOT(brightnessDownPressed()));
		}

	kdDebugFuncOut(trace);
}

/*!
 * This TQT_SLOT is used to fetch the resume signal and multiplex. If needed some
 * actions after resume, do this here.
 * \param result 	integer with the result of the resume/suspend
 */
void HardwareInfo::handleResumeSignal (int result) {
	if (trace) kdDebug() << funcinfo <<  "IN: " << "(int result: " << result << ")"<< endl;

	if (result == -1) {
		// check if time since suspend is higher than 6 hours,
		// the magic D-Bus timeout for pending calls
		if (calledSuspend.elapsed() > 21600000) {
			emit resumed(INT_MAX);
		}
	} else {
		emit resumed(result);
	}

	calledSuspend = TQTime();
	kdDebugFuncOut(trace);
}

/*!
 * This function check for a given UDI, if we should handle a device
 * \param _udi		TQString with the UDI of the device
 * \param *type		pointer to a integer to return the type of the device, see \ref device_type
 * \return 		Boolean with info if we should handle the device.
 * \retval true		if we should handle
 * \retval false	if not
 */
bool HardwareInfo::checkIfHandleDevice ( TQString _udi, int *type) {
	kdDebugFuncIn(trace);

	TQStringList _cap;
	bool ret = true;

	TDEGenericDevice* hwdevice = m_hwdevices->findByUniqueID(_udi);

	if (hwdevice) {
		TDEGenericDeviceType::TDEGenericDeviceType devtype = hwdevice->type();
		if (devtype == TDEGenericDeviceType::PowerSupply) {
			*type = BATTERY;
		} else if (devtype == TDEGenericDeviceType::Event) {
			TDEEventDevice* edevice = dynamic_cast<TDEEventDevice*>(hwdevice);
			if (edevice) {
				if (edevice->eventType() == TDEEventDeviceType::ACPILidSwitch) {
					*type = LID;
				} else if (edevice->eventType() == TDEEventDeviceType::ACPIPowerButton) {
					*type = BUTTON_POWER;
				} else if (edevice->eventType() == TDEEventDeviceType::ACPISuspendButton) {
					*type = BUTTON_SLEEP;
				} else {
					ret = false;
				}
			} else {
				ret = false;
			}
		} else if (devtype == TDEGenericDeviceType::Battery) {
			*type = BATTERY;
		} else if (devtype == TDEGenericDeviceType::Backlight) {
			*type = LAPTOP_PANEL;
		} else {
			ret = false;
			kdDebug() << "Device with type " << devtype << " unhandled" << endl;
		}
	} else {
		ret = false;
	}

	if (!ret) *type = UNKNOWN_DEVICE;

	kdDebugFuncOut(trace);
	return ret;
}

// --> set some values for devices
/*!
 * This function set the warning level for the primary battery collection
 * If all give param are -1 or not set this function force the current
 * settings to the primary battery collection.
 * \param _warn		value for the state BAT_WARN or -1
 * \param _low		value for the state BAT_LOW or -1
 * \param _crit		value for the state BAT_CRIT or -1
 */
void HardwareInfo::setPrimaryBatteriesWarningLevel (int _warn, int _low, int _crit ) {
	if (trace) kdDebug() << funcinfo << "IN: " << "warn: " << _warn << " low: " << _low << " crit: " << _crit << endl;

	if (_warn > -1 && _low > -1 && _crit > -1 ){
		primaryBatteriesWarnLevel = _warn;
		primaryBatteriesLowLevel = _low;
		primaryBatteriesCriticalLevel = _crit;
	}

	if (primaryBatteries) {
		primaryBatteries->setWarnLevel( primaryBatteriesWarnLevel );
		primaryBatteries->setLowLevel( primaryBatteriesLowLevel );
		primaryBatteries->setCritLevel( primaryBatteriesCriticalLevel );
		if (!BatteryList.isEmpty()) {
			primaryBatteries->refreshInfo( BatteryList, true );
		}
	}

	kdDebugFuncOut(trace);
}

// --> init HW information section -- START <---

/*!
 * The function checks if the machine is a laptop.
 */
void HardwareInfo::checkIsLaptop () {
	kdDebugFuncIn(trace);

	TQString ret;

	TDERootSystemDevice* rdevice = m_hwdevices->rootSystemDevice();

	if (rdevice->formFactor() == TDESystemFormFactor::Laptop) {
		laptop = true;
	}
	else {
		laptop = false;
	}

	kdDebugFuncOut(trace);
}

/*!
 * The function checks whether the machine support ACPI/APM/PMU or not.
 */
void HardwareInfo::checkPowermanagement() {
	kdDebugFuncIn(trace);

	TQString ret;

	has_APM = false;
	has_ACPI = false;
	has_PMU = false;

	TDEGenericHardwareList hwlist = m_hwdevices->listByDeviceClass(TDEGenericDeviceType::OtherACPI);
	if (hwlist.count() > 0) {
		has_ACPI = true;
	}

	// FIXME
	// Do we even need to detect APM and PMU devices in the year 2012?!?

	kdDebugFuncOut(trace);
}


/*!
 * The function checks whether the machine can suspend/standby.
 */
void HardwareInfo::checkSuspend() {
	kdDebugFuncIn(trace);

	suspend_states = SuspendStates();

	suspend_states.suspend2ram = false;
	suspend_states.suspend2ram_can = false;
	suspend_states.suspend2ram_allowed = -1;
	suspend_states.suspend2disk = false;
	suspend_states.suspend2disk_can = false;
	suspend_states.suspend2disk_allowed = -1;
	suspend_states.freeze = false;
	suspend_states.freeze_can = false;
	suspend_states.freeze_allowed = -1;
	suspend_states.standby = false;
	suspend_states.standby_can = false;
	suspend_states.standby_allowed = -1;
	suspend_states.suspend_hybrid = false;
	suspend_states.suspend_hybrid_can = false;
	suspend_states.suspend_hybrid_allowed = -1;

	TDERootSystemDevice* rdevice = m_hwdevices->rootSystemDevice();
	TDESystemPowerStateList powerStates = rdevice->powerStates();
	if (powerStates.count() > 0) {
		TDESystemPowerStateList::iterator it;
		for (it = powerStates.begin(); it != powerStates.end(); ++it) {
			if ((*it) == TDESystemPowerState::Active) {
				//
			}
			else if ((*it) == TDESystemPowerState::Standby) {
				suspend_states.standby = true;
				suspend_states.standby_allowed = rdevice->canStandby();
				suspend_states.standby_can = suspend_states.standby_allowed && suspend_states.standby;
			}
			else if ((*it) == TDESystemPowerState::Freeze) {
				suspend_states.freeze = true;
				suspend_states.freeze_allowed = rdevice->canFreeze();
				suspend_states.freeze_can = suspend_states.freeze_allowed && suspend_states.freeze;
			}
			else if ((*it) == TDESystemPowerState::Suspend) {
				suspend_states.suspend2ram = true;
				suspend_states.suspend2ram_allowed = rdevice->canSuspend();
				suspend_states.suspend2ram_can = suspend_states.suspend2ram_allowed && suspend_states.suspend2ram;
			}
			else if ((*it) == TDESystemPowerState::Hibernate) {
				suspend_states.suspend2disk = true;
				suspend_states.suspend2disk_allowed = rdevice->canHibernate();
				suspend_states.suspend2disk_can = suspend_states.suspend2disk_allowed && suspend_states.suspend2disk;
			}
			else if ((*it) == TDESystemPowerState::HybridSuspend) {
				suspend_states.suspend_hybrid = true;
				suspend_states.suspend_hybrid_allowed = rdevice->canHybridSuspend();
				suspend_states.suspend_hybrid_can = suspend_states.suspend_hybrid_allowed && suspend_states.suspend_hybrid;
			}
			else if ((*it) == TDESystemPowerState::PowerOff) {
				//
			}
		}
	}

	kdDebugFuncOut(trace);
}

/*!
 * The function checks whether the machine support CPU frequency changes
 */
void HardwareInfo::checkCPUFreq() {
	kdDebugFuncIn(trace);

	// Use the first CPU in the list; permissions are probably the same across all CPUs
	TDEGenericHardwareList hwlist = m_hwdevices->listByDeviceClass(TDEGenericDeviceType::CPU);
	TDEGenericDevice *hwdevice;
	hwdevice = hwlist.first();
	TDECPUDevice *cpudevice = static_cast<TDECPUDevice*>(hwdevice);

	if (!cpudevice->scalingDriver().isNull()) {
		cpuFreq = true;
		cpuFreqAllowed = cpudevice->canSetGovernor();

		checkCurrentCPUFreqPolicy();
	} else {
		cpuFreq = false;
	}

	kdDebugFuncOut(trace);
}

/*!
 * The function check the currently selected CPU Frequency policy
 * \return the current policy
 */
cpufreq_type HardwareInfo::checkCurrentCPUFreqPolicy() {
	kdDebugFuncIn(trace);

	// Use the first CPU in the list; permissions are probably the same across all CPUs
	TDEGenericHardwareList hwlist = m_hwdevices->listByDeviceClass(TDEGenericDeviceType::CPU);
	TDEGenericDevice *hwdevice;
	hwdevice = hwlist.first();
	TDECPUDevice *cpudevice = static_cast<TDECPUDevice*>(hwdevice);

	TQString gov = cpudevice->governor();

	cpufreq_type _current = UNKNOWN_CPUFREQ;

	if (cpuFreq) {
		if (!gov.isNull()) {
			kdDebug() << "got CPU Freq gov: " << gov << endl;
			if ((gov == "ondemand") || (gov == "userspace") || (gov == "conservative")) {
				_current = DYNAMIC;
			} else if (gov == "powersave") {
				_current = POWERSAVE;
			} else if (gov =="performance") {
				_current = PERFORMANCE;
			} else {
				kdError() << "Got unknown CPUFreq Policy back: " << gov << endl;
			}
			cpuFreqGovernor = gov;
		} else {
			kdWarning() << "Could not get information about current governor" << endl;
		}
	} else {
		kdWarning() << "CPU Frequency interface not supported by machine or TDE hardware library" << endl;
	}

	if (_current != currentCPUFreqPolicy) {
		currentCPUFreqPolicy = _current;
		update_info_cpufreq_policy_changed = true;
		emit currentCPUFreqPolicyChanged();
	} else {
		update_info_cpufreq_policy_changed = false;
	}

	kdDebugFuncOut(trace);
	return currentCPUFreqPolicy;
}


/*!
 * The function checks whether the machine provide a brightness interface and init
 * (if needed) brightness information.
 */
void HardwareInfo::checkBrightness() {
	kdDebugFuncIn(trace);

	TQStringList devices;

	brightness = false;
	currentBrightnessLevel = -1;
	availableBrightnessLevels = -1;

	// Use the first backlight in the list
	TDEGenericHardwareList hwlist = m_hwdevices->listByDeviceClass(TDEGenericDeviceType::Backlight);
	TDEGenericDevice *hwdevice;
	hwdevice = hwlist.first();
	TDEBacklightDevice *backlightdevice = static_cast<TDEBacklightDevice*>(hwdevice);

	if (backlightdevice) {
		udis.insert("laptop_panel", new TQString( hwdevice->uniqueID() ));
		if (!allUDIs.contains( hwdevice->uniqueID() )) {
			allUDIs.append( hwdevice->uniqueID() );
		}

		availableBrightnessLevels = backlightdevice->brightnessSteps();

		if (availableBrightnessLevels > 1) {
			brightnessAllowed = backlightdevice->canSetBrightness();

			brightness = true;
			// get the current level via GetBrightness
			checkCurrentBrightness();
		}
		else {
			availableBrightnessLevels = -1;
		}
	}
	else {
		udis.remove("laptop_panel");
		kdDebug() << "no device with category laptop_panel found" << endl;
		kdDebugFuncOut(trace);
		return;
	}

	kdDebugFuncOut(trace);
}


/*!
 * The function check the current brigthness
 */
void HardwareInfo::checkCurrentBrightness() {
	kdDebugFuncIn(trace);

	if (brightness) {
		// Use the first backlight in the list
		TDEGenericHardwareList hwlist = m_hwdevices->listByDeviceClass(TDEGenericDeviceType::Backlight);
		TDEGenericDevice *hwdevice;
		hwdevice = hwlist.first();
		TDEBacklightDevice *backlightdevice = static_cast<TDEBacklightDevice*>(hwdevice);

		if (backlightdevice) {
			currentBrightnessLevel = backlightdevice->rawBrightness();
		}
	}

	kdDebugFuncOut(trace);
}


/*!
 * The function initialise the hardware information and collect all
 * initial information from TDE hardware library.
 * \return boolean with result of the operation
 * \retval true  if successful
 * \retval false else, if a error occurs
 */
bool HardwareInfo::intialiseHWInfo() {
	kdDebugFuncIn(trace);

	TDEGenericDevice *hwdevice;
	TDEGenericHardwareList hwlist;

	hwlist = m_hwdevices->listByDeviceClass(TDEGenericDeviceType::PowerSupply);
	for ( hwdevice = hwlist.first(); hwdevice; hwdevice = hwlist.next() ) {
		udis.insert("acadapter", new TQString( hwdevice->uniqueID() ));
		if (!allUDIs.contains( hwdevice->uniqueID() )) {
			allUDIs.append( hwdevice->uniqueID() );
		}
		checkACAdapterState();
	}

	hwlist = m_hwdevices->listByDeviceClass(TDEGenericDeviceType::Event);
	for ( hwdevice = hwlist.first(); hwdevice; hwdevice = hwlist.next() ) {
		TDEEventDevice* edevice = dynamic_cast<TDEEventDevice*>(hwdevice);
		if (edevice->eventType() == TDEEventDeviceType::ACPILidSwitch) {
			udis.insert("lidclose", new TQString( hwdevice->uniqueID() ));
			if (!allUDIs.contains( hwdevice->uniqueID() )) {
				allUDIs.append( hwdevice->uniqueID() );
			}
			connect(edevice, TQT_SIGNAL(switchChanged()), this, TQT_SLOT(checkLidcloseState()));
			checkLidcloseState();
		}
	}

	// find batteries and fill battery information
	hwlist = m_hwdevices->listByDeviceClass(TDEGenericDeviceType::Battery);
	for ( hwdevice = hwlist.first(); hwdevice; hwdevice = hwlist.next() ) {
		if (!allUDIs.contains( hwdevice->uniqueID() )) {
			allUDIs.append( hwdevice->uniqueID() );
		}
		BatteryList.append( new Battery( hwdevice->uniqueID() ) );
	}
	// connect to signals for primary batteries:
	Battery *bat;
	for (bat = BatteryList.first(); bat; bat = BatteryList.next() ) {
		if (bat->getType() == BAT_PRIMARY) {
			connect(bat, TQT_SIGNAL(changedBattery()),this, TQT_SLOT(updatePrimaryBatteries()));
		}
	}

	kdDebugFuncOut(trace);
	return true;
}

/*!
 * The function/TQT_SLOT checks the state of the AC adapter.
 */
void HardwareInfo::checkACAdapterState() {
	kdDebugFuncIn(trace);

	if ( udis["acadapter"] ) {
		bool _state;

		TDEMainsPowerDevice* mdevice = dynamic_cast<TDEMainsPowerDevice*>(m_hwdevices->findByUniqueID(*udis["acadapter"]));
		if (mdevice) {
			_state = mdevice->online();
			if (_state != acadapter) {
				acadapter = _state;
				update_info_ac_changed = true;
				emit ACStatus( acadapter );
			} else {
				update_info_ac_changed = false;
			}
		}
		else {
			// we use true as default e.g. for workstations
			acadapter = true;
		}
	}

	kdDebugFuncOut(trace);
}

/*!
 * The function checks the state of the Lidclose button.
 */
void HardwareInfo::checkLidcloseState() {
	kdDebugFuncIn(trace);

	if ( udis["lidclose"] ) {
		bool _state;

		TDEEventDevice* edevice = dynamic_cast<TDEEventDevice*>(m_hwdevices->findByUniqueID(*udis["lidclose"]));
		if (edevice) {
			_state = (edevice->activeSwitches() & TDESwitchType::Lid);
			if (_state != lidclose) {
				lidclose = _state;
				emit lidclosetStatus( lidclose );
			}
		} else {
			lidclose = false;
		}
	}

	kdDebugFuncOut(trace);
}

/*!
 * This funtion is used to call a update of a battery value for a given
 * UDI and the given changed property
 * \param udi 		TQString with the UDI of the battery
 * \param property	TQString with the changed property
 */
void HardwareInfo::updateBatteryValues (TDEGenericDevice* device) {
	kdDebugFuncIn(trace);

	if (device && allUDIs.contains( device->uniqueID() )) {
		// find effected battery object
		Battery *bat;
		for (bat = BatteryList.first(); bat; bat = BatteryList.next() ) {
			if (device->uniqueID().startsWith( bat->getUdi())) {
				TDEBatteryDevice* bdevice = dynamic_cast<TDEBatteryDevice*>(device);
				if (bdevice) {
					// found a battery with udi
					bat->updateProperty(bdevice);
				}
			}
		}
	} else {
		kdDebug() << "UDI is empty or not in the list of monitored devices " << endl;
	}

	kdDebugFuncOut(trace);
	return;
}

/*!
 * This function refresh the information for the primary battery collection.
 */
void HardwareInfo::updatePrimaryBatteries () {
	kdDebugFuncIn(trace);

	if (!BatteryList.isEmpty()) {
		if (primaryBatteries->getNumBatteries() < 1) {
			setPrimaryBatteriesWarningLevel();
			primaryBatteries->refreshInfo( BatteryList );
			connect(primaryBatteries, TQT_SIGNAL(batteryChanged()), this,
				TQT_SLOT(setPrimaryBatteriesChanges()));
			connect(primaryBatteries, TQT_SIGNAL(batteryWarnState(int,int)), this,
				TQT_SLOT(emitBatteryWARNState(int,int)));
		} else {
			setPrimaryBatteriesWarningLevel();
			primaryBatteries->refreshInfo( BatteryList );
		}
	} else {
		primaryBatteries = new BatteryCollection(BAT_PRIMARY);
	}

	kdDebugFuncOut(trace);
}

/*!
 * This function set the change status for the primary battery collection
 */
void HardwareInfo::setPrimaryBatteriesChanges () {
	kdDebugFuncIn(trace);

	update_info_primBattery_changed = true;
	emit primaryBatteryChanged();

	kdDebugFuncOut(trace);
}

/*!
 * This slot emit a signal if a warning state of a battery reached
 */
void HardwareInfo::emitBatteryWARNState (int type, int state) {
	kdDebugFuncIn(trace);

	if (type == BAT_PRIMARY)
		emit primaryBatteryChanged();
	else
		emit generalDataChanged();

	emit batteryWARNState(type, state);

	kdDebugFuncOut(trace);
}

// --> init HW information section -- END <---
// --> TDE hardware library method call (trigger actions) section -- START <---

/*!
 * Function to trigger a suspend via TDE hardware library
 * \param suspend 	enum of suspend_type with the requested suspend
 * \return boolean with result of the operation
 * \retval true  	if successful
 * \retval false 	else, if a error occurs
 */
bool HardwareInfo::suspend( suspend_type suspend ) {
	kdDebugFuncIn(trace);

	calledSuspend = TQTime();

	TDERootSystemDevice* rdevice = m_hwdevices->rootSystemDevice();

	if (rdevice) {
		switch (suspend) {
			case SUSPEND2DISK:
				if (suspend_states.suspend2disk && (suspend_states.suspend2disk_allowed != 0)) {
					if (rdevice->setPowerState(TDESystemPowerState::Hibernate)) {
						calledSuspend.start();
						handleResumeSignal(0);
						return true;
					} else {
						handleResumeSignal(-1);
						return false;
					}
				} else {
					if ( !suspend_states.suspend2disk )
						kdDebug() << "The machine does not support hibernation." << endl;
					else
						kdWarning() << "Policy forbid user to trigger hibernation" << endl;

					return false;
				}
				break;
				
			case SUSPEND_HYBRID:
				if (suspend_states.suspend_hybrid && (suspend_states.suspend_hybrid_allowed != 0)) {
					if (rdevice->setPowerState(TDESystemPowerState::HybridSuspend)) {
						calledSuspend.start();
						handleResumeSignal(0);
						return true;
					} else {
						handleResumeSignal(-1);
						return false;
					}
				} else {
					if ( !suspend_states.suspend_hybrid )
						kdDebug() << "The machine does not support hybrid suspension." << endl;
					else
						kdWarning() << "Policy forbid user to trigger hybrid suspension" << endl;

					return false;
				}
				break;
			
			case SUSPEND2RAM:
				if (suspend_states.suspend2ram && (suspend_states.suspend2ram_allowed != 0)) {
					if (rdevice->setPowerState(TDESystemPowerState::Suspend)) {
						calledSuspend.start();
						handleResumeSignal(0);
						return true;
					} else {
						handleResumeSignal(-1);
						return false;
					}
				} else {
					if ( !suspend_states.suspend2ram )
						kdDebug() << "The machine does not support Suspend mode." << endl;
					else
						kdWarning() << "Policy forbid user to trigger Suspend mode" << endl;

					return false;
				}
				break;
				
			case FREEZE:
				if (suspend_states.freeze && (suspend_states.freeze_allowed != 0)) {
					if (rdevice->setPowerState(TDESystemPowerState::Freeze)) {
						calledSuspend.start();
						handleResumeSignal(0);
						return true;
					} else {
						handleResumeSignal(-1);
						return false;
					}
				} else {
					if ( !suspend_states.freeze )
						kdDebug() << "The machine does not support freeze." << endl;
					else
						kdWarning() << "Policy forbid user to trigger freeze" << endl;

					return false;
				}
				break;
				
			case STANDBY:
				if (suspend_states.standby && (suspend_states.standby_allowed != 0)) {
					if (rdevice->setPowerState(TDESystemPowerState::Standby)) {
						calledSuspend.start();
						handleResumeSignal(0);
						return true;
					} else {
						handleResumeSignal(-1);
						return false;
					}
				} else {
					if ( !suspend_states.standby )
						kdDebug() << "The machine does not support standby." << endl;
					else
						kdWarning() << "Policy forbid user to trigger standby" << endl;

					return false;
				}
				break;
				
			default:
				return false;
		}
	}

	kdDebugFuncOut(trace);
	return false;
}

/*!
 * Function to set brightness via TDE hardware library (if supported by hardware)
 * \param level		Integer with the level to set, (range: 0 - \ref availableBrightnessLevels )
 * \param percent	Integer with the brightness percentage to set
 * \return boolean with result of the operation
 * \retval true  	if successful
 * \retval false 	else, if a error occurs
 */
bool HardwareInfo::setBrightness ( int level, int percent ){
	if (trace) kdDebug() << funcinfo << "IN: " << "level: " << level << " percent: " << percent << endl;

	bool retval = false;

	if ((level == -1) && (percent >= 0)) {
		if (percent == 0) {
			level = 0;
		} else if (percent >= 98) {
			level = (availableBrightnessLevels - 1);
		} else {
			level = (int)((float)availableBrightnessLevels * ((float)percent/100.0));
			if (level > (availableBrightnessLevels -1))
				level = availableBrightnessLevels -1;
			kdDebug() << "percentage mapped to new level: " << level << endl;
		}
	}

	// Use the first backlight in the list
	TDEGenericHardwareList hwlist = m_hwdevices->listByDeviceClass(TDEGenericDeviceType::Backlight);
	TDEGenericDevice *hwdevice;
	hwdevice = hwlist.first();
	TDEBacklightDevice *backlightdevice = static_cast<TDEBacklightDevice*>(hwdevice);

	if (backlightdevice) {
		if (!brightness) {
			checkBrightness();
		}

		if (!brightness || (level < 0 ) || (level >= availableBrightnessLevels)) {
			kdError() << "Change brightness or requested level not supported " << endl;
		} else {
			if (currentBrightnessLevel == level) {
				kdDebug() << "Brightness level not changed, requested level == current level" << endl;
				retval = true;
			} else {
				backlightdevice->setRawBrightness(level);
				retval = true;
			}
		}
	}

	// check for actual brightness level to be sure everything was set correct
	checkCurrentBrightness();
	kdDebugFuncOut(trace);
	return retval;
}

/*!
 * Function to set the CPU frequency policy via TDE hardware library.
 * \param cpufreq 	enum of cpufreq_type with the policy to set
 * \param limit 	integer with range 0 - 100 (only if cpufreq == DYNAMIC)
 * \return boolean with result of the operation
 * \retval true  	if successful
 * \retval false 	else, if a error occurs
 */
bool HardwareInfo::setCPUFreq ( cpufreq_type cpufreq, int limit ) {
	if (trace) kdDebug() << funcinfo << "IN: " <<  "cpufreq_type: " << cpufreq << " limit: " << limit << endl;

	if (!cpuFreq) {
		kdError() << "This machine does not support change the CPU Freq via TDE hardware library" << endl;
		return false;
	}

	if (cpuFreqAllowed  == 0) {
		kdError() << "Could not set CPU Freq - insufficient privileges." << endl;
		return false;
	}

	TDEGenericHardwareList hwlist = m_hwdevices->listByDeviceClass(TDEGenericDeviceType::CPU);

	if (hwlist.count() > 0) {
		TQStringList dynamic;

		if (checkCurrentCPUFreqPolicy() == cpufreq) {
			if (cpufreq == DYNAMIC && !cpuFreqGovernor.startsWith("ondemand")) {
				kdDebug() << "CPU Freq Policy is already DYNAMIC, but not governor is currently "
					  << "not 'ondemand'. Try to set ondemand governor." << endl;
			} else {
				kdDebug() << "Didn't change Policy, was already set." << endl;
				return true;
			}
		}

		switch (cpufreq) {
			case PERFORMANCE:
				if (!setCPUFreqGovernor("performance")) {
					kdError() << "Could not set CPU Freq to performance policy" << endl;
					return false;
				}
				break;
			case DYNAMIC:
				dynamic << "ondemand" << "userspace" << "conservative";

				for (TQStringList::Iterator it = dynamic.begin(); it != dynamic.end(); it++){
					kdDebug() << "Try to set dynamic CPUFreq to: " << *it << endl;

					if (setCPUFreqGovernor((*it).latin1())) {
						kdDebug() << "Set dynamic successful to: " << *it << endl;
						break;
					}
				}

				// Set performance limits on all CPUs
				TDEGenericDevice *hwdevice;
				TDECPUDevice *cpudevice;
				for ( hwdevice = hwlist.first(); hwdevice; hwdevice = hwlist.next() ) {
					cpudevice = static_cast<TDECPUDevice*>(hwdevice);
					// set dynamic performance limit
					// scale the desired limit so that when limit==0 the minFrequency() is used, and when limit==100 the maxFrequency() is used
					double cpuLimit = cpudevice->maxFrequency() - cpudevice->minFrequency();
					cpuLimit = (cpuLimit * limit) / 100.0;
					cpuLimit = cpudevice->maxFrequency() + cpuLimit;
					cpudevice->setMaximumScalingFrequency(cpuLimit);

				}

				break;
			case POWERSAVE:
				if (!setCPUFreqGovernor("powersave")) {
					kdError() << "Could not set CPU Freq to powersave policy" << endl;
					return false;
				}
				break;
			default:
				kdWarning() << "Unknown cpufreq_type: " << cpufreq << endl;
				return false;
		}

		// check if the policy was really set (and emit signal)
		if (checkCurrentCPUFreqPolicy() == cpufreq) {
//			update_info_cpufreq_policy_changed = true;
//			emit currentCPUFreqPolicyChanged();
			return true;
		} else {
			return false;
		}
	} else {
		return false;
	}
}

/*!
 * Function to set the CPU governor via TDE hardware library.
 * \param governor	char * with the name of the governor
 * \return boolean with result of the operation
 * \retval true  	if successful
 * \retval false 	else, if a error occurs
 */
bool HardwareInfo::setCPUFreqGovernor( const char *governor ) {
	kdDebugFuncIn(trace);

	bool ret = true;

	TDEGenericHardwareList hwlist = m_hwdevices->listByDeviceClass(TDEGenericDeviceType::CPU);
	TDEGenericDevice *hwdevice;
	TDECPUDevice *cpudevice;
	// Set governor on all CPUs
	for ( hwdevice = hwlist.first(); hwdevice; hwdevice = hwlist.next() ) {
		cpudevice = static_cast<TDECPUDevice*>(hwdevice);
		cpudevice->setGovernor(governor);
		if (cpudevice->governor() != governor) {
			ret = false;
		}
	}

	kdDebugFuncOut(trace);
	return ret;
}



// --> TDE hardware library method call (trigger actions) section -- END <---

// --> private helper functions/slots to forward/handle events  -- START <--
//     need this functions to make events independent
//     from TQt event loop and to allow TQt3 D-Bus bindings to get not
//     blocked by normal TDE/TQt (GUI) calls
/*!
 * Function to emit the signal for the Power button.
 */
void HardwareInfo::emitPowerButtonPressed() {
	if (sessionIsActive) {
		emit powerButtonPressed();
	} else {
		kdWarning() << "Session is not active, don't react on power button event!" << endl;
	}
}

/*!
 * Function to emit the signal for the Suspend button.
 */
void HardwareInfo::emitSuspendButtonPressed() {
	if (sessionIsActive) {
		emit sleepButtonPressed();
	} else {
		kdWarning() << "Session is not active, don't react on sleep button event!" << endl;
	}
}

/*!
 * Function to emit the signal for the s2disk button.
 */
void HardwareInfo::emitS2diskButtonPressed() {
	if (sessionIsActive) {
		emit s2diskButtonPressed();
	} else {
		kdWarning() << "Session is not active, don't react on suspend2disk button event!" << endl;
	}
}

/*!
 * Function to emit the signal about changes in the session state
 */
void HardwareInfo::emitSessionActiveState() {
	emit desktopSessionIsActive(sessionIsActive);
}

/*!
 * Function to set the brightess a step up.
 * \param percentageStep Integer of next step should get set
 * \return result of the operation
 * \retval true		if could get set
 * \retval false	else
 */
bool HardwareInfo::setBrightnessUp(int percentageStep) {
	kdDebugFuncIn(trace);

	bool retval = false;

	checkCurrentBrightness();

	if (supportBrightness() && (getCurrentBrightnessLevel() >= 0) &&
            (getCurrentBrightnessLevel() != (getMaxBrightnessLevel()-1))) {
		int setTo = 0;
		int minPercStep = 10;
		int currentPerc = (int)(((float)getCurrentBrightnessLevel()/(float)(getMaxBrightnessLevel()-1))*100.0);

		if (percentageStep > 0 && (percentageStep <= (100-currentPerc))) {
			minPercStep = percentageStep;
		}

		if ((currentPerc + minPercStep) > 100) {
			// set to 100 %
			setTo = getMaxBrightnessLevel() -1;
		} else {
			setTo = (int)(((float)(getMaxBrightnessLevel()-1))*(((float)(currentPerc + minPercStep))/100.0));
			if ((setTo == getCurrentBrightnessLevel()) && (setTo <  (getMaxBrightnessLevel() -1))) {
				setTo++;
			}
		}

		if (trace) {
			kdDebug() << "Max: " << getMaxBrightnessLevel()
				  << " Current: " << getCurrentBrightnessLevel()
				  << " minPercStep: " << minPercStep
				  << " currentPerc: " << currentPerc
				  << " setTo: " << setTo << endl;
		}

		retval = setBrightness(setTo, -1);
	}

	kdDebugFuncOut(trace);
	return retval;
}

/*!
 * Function to set the brightess a step up.
 * \param percentageStep Integer of next step should get set
 * \return result of the operation
 * \retval true		if could get set
 * \retval false	else
 */
bool HardwareInfo::setBrightnessDown(int percentageStep) {
	kdDebugFuncIn(trace);

	bool retval = false;

	checkCurrentBrightness();

	if (supportBrightness() && (getCurrentBrightnessLevel() > 0)) {
		int setTo = 0;
		int minPercStep = 10;
		int currentPerc = (int)(((float)getCurrentBrightnessLevel()/(float)(getMaxBrightnessLevel()-1))*100.0);

		if (percentageStep > 0 && (percentageStep < currentPerc)) {
			minPercStep = percentageStep;
		}

		if ((currentPerc - minPercStep) < 0) {
			setTo = 0;
		} else {
			setTo = (int)(((float)(getMaxBrightnessLevel()-1))*(((float)(currentPerc - minPercStep))/100.0));
			if ((setTo == getCurrentBrightnessLevel()) && (setTo > 0)) {
				setTo--;
			}
		}

		if (trace) {
			kdDebug() << "Max: " << getMaxBrightnessLevel()
				  << " Current: " << getCurrentBrightnessLevel()
				  << " minPercStep: " << minPercStep
				  << " currentPerc: " << currentPerc
				  << " setTo: " << setTo << endl;
		}

		retval = setBrightness(setTo, -1);
	}

	kdDebugFuncOut(trace);
	return retval;
}

/*!
 * Function to handle the signal for the brightness up button/key
 */
void HardwareInfo::brightnessUpPressed() {
	kdDebugFuncIn(trace);

	if (brightness) {
		if (!sessionIsActive) {
			kdWarning() << "Session is not active, don't react on brightness up key event!" << endl;
		} else {
			if (currentBrightnessLevel < availableBrightnessLevels) {
				setBrightnessUp();
			} else {
				kdWarning() << "Could not set brightness to higher level, it's already set to max." << endl;
			}
		}
	}
	kdDebugFuncOut(trace);
}

/*!
 * Function to handle the signal for the brightness down button/key
 */
void HardwareInfo::brightnessDownPressed() {
	kdDebugFuncIn(trace);

	if (brightness) {
		if (!sessionIsActive) {
			kdWarning() << "Session is not active, don't react on brightness down key event!" << endl;
		} else {
			if (currentBrightnessLevel > 0) {
				setBrightnessDown();
			} else {
				kdWarning() << "Could not set brightness to lower level, it's already set to min." << endl;
			}
		}
	}
}

// --> private helper slots to forward/handle events -- END <--

// --> get private members section -- START <---

/*!
 * The function return the current state of the ac adapter.
 * \return boolean with the current state
 * \retval true 	if adapter is present/connected or unknown
 * \retval false 	if not
 */
bool HardwareInfo::getAcAdapter() const {
	return acadapter;
}

/*!
 * The function return the current state of the lidclose button.
 * \return boolean with the current state
 * \retval true 	if the lid is closed
 * \retval false 	if the lid is opend
 */
bool HardwareInfo::getLidclose() const {
	return lidclose;
}

/*!
 * The function return the maximal available brightness level
 * \return Integer with max level or -1 if not supported
 */
int HardwareInfo::getMaxBrightnessLevel() const {
	if (brightness)
		return availableBrightnessLevels;
	else
		return -1;
}

/*!
 * The function return the current brightness level
 * \return Integer with max level or -1 if not supported or unkown
 */
int HardwareInfo::getCurrentBrightnessLevel() const {
	if (brightness)
		return currentBrightnessLevel;
	else
		return -1;
}

/*!
 * The function return the current set CPU Frequency Policy
 * \return Integer with currently set Policy or -1 if not supported or unkown
 */
int HardwareInfo::getCurrentCPUFreqPolicy() const {
	return currentCPUFreqPolicy;
}

/*!
 * The function return information if the system support the different
 * suspend/standby methodes and if the user can call them.
 * \return struct with information from \ref suspend_states
 * TODO: check if we maybe should replace this by more different functions
 */
SuspendStates HardwareInfo::getSuspendSupport() const {
	return suspend_states;
}

/*!
 * The function return a pointer to the battery collection of primary batteries.
 * \return BatteryCollection with type == PRIMARY
 */
BatteryCollection* HardwareInfo::getPrimaryBatteries() const {
	return primaryBatteries;
}

/*!
 * The function return all batteries
 * \return TQPtrList<Battery>
 */
TQPtrList<Battery> HardwareInfo::getAllBatteries() const {
	return BatteryList;
}


/*!
 * The function return the status of \ref laptop.
 * \return boolean with info if machine is a laptop
 * \retval true 	if a laptop
 * \retval false 	else/if not a laptop
 */
bool HardwareInfo::isLaptop() const {
	return laptop;
}

/*!
 * The function return info if there is a working connection to TDE hardware library.
 * This mean if we get hardwareinformation
 * \return boolean with info if TDE hardware library work
 * \retval true 	if connected
 * \retval false 	if not connected
 */
bool HardwareInfo::isOnline() const {
	// FIXME
	// Is there ANY case where the TDE hardware library would not function?
	return true;
}

/*!
 * The function return the status of \ref has_ACPI.
 * \return boolean with info if machine support ACPI
 * \retval true 	if support ACPI
 * \retval false 	else
 */
bool HardwareInfo::hasACPI() const {
	return has_ACPI;
}

/*!
 * The function return the status of \ref has_APM.
 * \return boolean with info if machine support APM
 * \retval true 	if support APM
 * \retval false 	else
 */
bool HardwareInfo::hasAPM() const {
	return has_APM;
}

/*!
 * The function return the status of \ref has_PMU.
 * \return boolean with info if machine support PMU
 * \retval true 	if support PMU
 * \retval false 	else
 */
bool HardwareInfo::hasPMU() const {
	return has_PMU;
}

/*!
 * The function return the status of \ref brightness.
 * \return boolean with info if machine support brightness changes via TDE hardware library
 * \retval true 	if support brightness changes
 * \retval false 	else
 */
bool HardwareInfo::supportBrightness() const {
	return brightness;
}

/*!
 * The function return the status of \ref cpuFreq.
 * \return boolean with info if machine support change the CPU frequency via TDE hardware library
 * \retval true 	if support brightness changes
 * \retval false 	else
 */
bool HardwareInfo::supportCPUFreq() const {
	return cpuFreq;
}

/*!
 * The function return the status of \ref sessionIsActive.
 * \return boolean with info if current desktop session is marked in ConsoleKit as activ
 * \retval true 	if the current session is active
 * \retval false 	else
 */
bool HardwareInfo::currentSessionIsActive() const {
	return sessionIsActive;
}

/*!
 * The function return \ref cpuFreqAllowed and tell by this if the user is allowed
 * to change the CPU Freq.
 * \return \ref cpuFreqAllowed
 * \retval	0 allowed
 * \retval	1 not allowed
 * \retval	-1 unknown
 */
int HardwareInfo::isCpuFreqAllowed () {
	// Use the first CPU in the list; permissions are probably the same across all CPUs
	TDEGenericHardwareList hwlist = m_hwdevices->listByDeviceClass(TDEGenericDeviceType::CPU);
	TDEGenericDevice *hwdevice;
	hwdevice = hwlist.first();
	TDECPUDevice *cpudevice = static_cast<TDECPUDevice*>(hwdevice);

	cpuFreqAllowed = cpudevice->canSetGovernor();
	return cpuFreqAllowed;
}

// --> get private members section -- END <---

#include "hardware.moc"