2 * QCPUFreq - a simple cpufreq GUI
3 * Copyright (C) 2010 Daniel Klaffenbach <danielklaffenbach@gmail.com>
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 3 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
19 #include "mainwindow.h"
20 #include "ui_mainwindow.h"
23 #include <QMessageBox>
24 #include <QTextStream>
25 #include <QDesktopWidget>
26 #if defined(Q_WS_MAEMO_5)
27 #include <QMaemo5InformationBox>
30 #define APPNAME "QCPUFreq"
31 #define APPVERSION "0.4.2"
34 MainWindow::MainWindow(QWidget *parent) :
36 ui(new Ui::MainWindow),
37 //create helper process
38 helperProcess( this ),
39 //create a new, stackable help window
41 //create UI refresh timer
43 //create a QGraphicsScene for the little chip icon
46 //this is a stacked window on Maemo 5
47 #if defined(Q_WS_MAEMO_5)
48 setAttribute(Qt::WA_Maemo5StackedWindow);
54 settings = new Settings;
58 loadPresetDialog = new LoadPreset;
59 loadPresetDialog->hide();
63 //applies the settings from the settings dialog
66 //initialize orientation
69 //refresh UI every 10 seconds
70 refreshTimer.start( 10000 );
72 // initialize stackable help window
73 #if defined(Q_WS_MAEMO_5)
74 helpWindow.setAttribute(Qt::WA_Maemo5StackedWindow);
76 helpWindow.setWindowFlags( windowFlags() | Qt::Window );
78 //show errors about the sudo setup only once
81 //connect signals and slots
82 connect(ui->actionHelp, SIGNAL(triggered()), this, SLOT(showHelp()));
83 connect( ui->actionAbout, SIGNAL(triggered()), this, SLOT(about()) );
84 connect( ui->freq_adjust, SIGNAL(sliderReleased()), this, SLOT(adjustFreq()) );
85 connect(ui->freq_adjust, SIGNAL(valueChanged(int)), this, SLOT(showTemporaryMaxFreq()));
86 connect(QApplication::desktop(), SIGNAL(resized(int)), this, SLOT(orientationChanged()));
87 connect(ui->sr_box, SIGNAL(clicked()), this, SLOT(setSmartReflex()));
88 connect(&refreshTimer, SIGNAL(timeout()), this, SLOT(refresh()));
89 connect(ui->actionSave, SIGNAL(triggered()), this, SLOT(save()));
90 connect(ui->actionLoad, SIGNAL(triggered()), loadPresetDialog, SLOT(show()));
91 connect(ui->actionSettings, SIGNAL(triggered()), this, SLOT(showSettings()));
92 connect(settings, SIGNAL(settingsChanged()), this, SLOT(applySettings()));
93 connect(loadPresetDialog, SIGNAL(load(QString)), this, SLOT(loadPreset(QString)));
97 MainWindow::~MainWindow()
99 delete loadPresetDialog;
106 * SLOT: Displays an about box
108 void MainWindow::about()
110 QMessageBox::about(this, APPNAME " " APPVERSION, "<p style=\"align:center;\">© 2010 Daniel Klaffenbach</p>" );
116 * SLOT: Adjusts the maximum CPU frequency according to the scaler
118 void MainWindow::adjustFreq()
120 int newmax = getScalingFreq( ui->freq_adjust->sliderPosition() );
122 if (newmax == getMaxFreq() ) {
123 //we do not need to change anything in this case
129 //maxfreq should not be smaller than minfreq, because we do not want to decrease minfreq
130 if (newmax < getMinFreq())
131 newmax = getMinFreq();
133 max.setNum( newmax );
135 //check for overclocking
136 #if defined(Q_WS_MAEMO_5)
137 if (!settings->useOverclocking() && newmax > 600000) {
138 QMaemo5InformationBox::information(this, tr( "You need to enable overclocking in QCPUFreq's settings in order to set frequencies above 600MHz!"), 0);
144 //check for 599MHz <-> 600MHz problem on power kernels
145 if (max == "600000" && settings->usePowerKernel()) {
146 //we really need to set the maximum to 599MHz
150 if (settings->useConfirmation()) {
152 box.setAttribute(Qt::WA_Maemo5AutoOrientation, settings->useAutoRotate());
153 box.setStandardButtons(QMessageBox::Apply | QMessageBox::Cancel);
154 box.setDefaultButton(QMessageBox::Apply);
155 box.setIcon(QMessageBox::Question);
157 verboseMax.setNum( newmax/1000 );
158 box.setText( tr("Do you really want to use %1 MHz as the new maximum frequency?").arg(verboseMax) );
159 int ret = box.exec();
161 if (ret != QMessageBox::Apply) {
167 callHelper( "set_maxfreq", max );
174 * SLOT: applies the settings from the Settings dialog.
176 void MainWindow::applySettings()
179 setAdvancedTemperature();
181 //if overclocking is/was enabled we can also enable the "Load preset" option
182 if (settings->useOverclocking() && settings->usePowerKernel() && settings->isKernelConfigInstalled()) {
183 ui->actionLoad->setEnabled(true);
185 ui->actionLoad->setEnabled(false);
188 //refresh the GUI after applying the settings
194 * Calls the QCPUFreq helper script with "sudo action param"
196 * @param action : the action of the helper script
197 * @param param : the parameter for the action
200 int MainWindow::callHelper(QString action, QString param)
202 QStringList arguments;
204 #if defined(Q_WS_MAEMO_5)
205 //On Maemo 5 the helper script resides in /opt/usr/bin, which is usually not in $PATH
206 arguments.append( "/opt/usr/bin/QCPUFreq.helper" );
208 arguments.append( "QCPUFreq.helper" );
211 arguments.append( action );
212 arguments.append( param );
214 helperProcess.start( "sudo", arguments, QIODevice::NotOpen );
216 if ( showSudoError && !helperProcess.waitForFinished( 2000 )) {
217 //do not show this error again
218 showSudoError = false;
219 QMessageBox::critical(this, tr("QCPUFreq"), tr("There seems to be a problem with your sudo setup!"));
222 return helperProcess.exitCode();
227 * Returns the current CPU temperature
229 QString MainWindow::getCPUTemp()
231 #if defined(Q_WS_MAEMO_5)
232 QFile file( "/sys/class/power_supply/bq27200-0/temp" );
234 //check if we can read a more accurate temperature (only for power kernel)
236 return QString( readSysFile( "class/power_supply/bq27200-0/temp" ) + " " + QString::fromUtf8("\302\260") + "C" );
239 We actually only need to read the raw temperature, but it appears that by also reading temp1_input
240 the raw temperature (temp1_input_raw) is being updated more frequently.
242 readSysFile( "devices/platform/omap34xx_temp/temp1_input" );
244 //read the current system temperature
245 QString tstring = readSysFile( "devices/platform/omap34xx_temp/temp1_input_raw" );
247 return tr( "Unknown" );
249 //convert it to an integer and calculate the approx. temperature from the raw value
250 int tint = tstring.toInt();
251 tint = ( 0.65 * tint );
252 tstring.setNum(tint);
253 return QString( tstring + " " + QString::fromUtf8("\302\260") + "C" );
256 return tr( "Unknown" );
261 * Returns the maximum CPU frequency
263 int MainWindow::getMaxFreq()
265 QString tmp = readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_max_freq" );
271 * Returns the minimum CPU frequency
273 int MainWindow::getMinFreq()
275 return this->minFreq;
280 * Returns the CPU frequency for the specified scaling step
282 int MainWindow::getScalingFreq(int step)
287 if ( step > getScalingSteps() - 1 )
288 step = getScalingSteps() - 1;
290 return this->scalingFrequencies[ step ].toInt();
295 * Returns the name of the current CPU frequency scaling governor
297 * @return QString - name of governor
299 QString MainWindow::getScalingGovernor()
301 return readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_governor" );
306 * Returns the amount of available scaling steps.
310 int MainWindow::getScalingSteps()
312 return this->scalingSteps;
317 * Returns the scaling step for the specified frequency.
321 int MainWindow::getScalingStep( int freq )
325 return this->scalingFrequencies.indexOf(tmp) + 1;
330 * Returns the SmartReflex(tm) state
334 int MainWindow::getSmartReflexState()
336 //SmartReflex is only supprted on Maemo5
337 #if defined(Q_WS_MAEMO_5)
338 QString tmp = readSysFile( "power/sr_vdd1_autocomp" );
346 //disable UI checkbox
347 ui->sr_box->setDisabled( true );
355 * Initializes internal variables, such as:
357 * - scalingFrequencies
360 void MainWindow::init()
363 QString freqs = readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies" );
364 QStringList freqList = freqs.split( " " );
365 //change the order of the QStringList - last element becomes first
366 for (int i=freqList.size() - 1; i>=0; --i) {
367 if (freqList.at(i) != "")
368 this->scalingFrequencies << freqList.at(i);
370 this->scalingSteps = (this->scalingFrequencies.size());
372 //set minFreq and check avoid_frequencies
373 QString min = readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_min_freq" );
374 //check if avoid file exists (only on power kernel)
375 QFile file( "/sys/devices/system/cpu/cpu0/cpufreq/ondemand/avoid_frequencies" );
377 QString avoid = readSysFile( "devices/system/cpu/cpu0/cpufreq/ondemand/avoid_frequencies" );
378 QStringList avoidList = avoid.split( " " );
380 //check if min is in avoid_frequencies
381 for (int i = getScalingStep( min.toInt() ); i <= this->scalingSteps; ++i) {
382 min.setNum( getScalingFreq(i) );
383 if (!avoidList.contains(min)) {
384 this->minFreq = min.toInt();
389 this->minFreq = min.toInt();
393 //enable save and load option on power kernels
394 if (settings->usePowerKernel() && settings->isKernelConfigInstalled()) {
395 ui->actionSave->setEnabled(true);
396 //loading presets may cause overclocking - only enable it if overclokcing is enabled
397 if (settings->useOverclocking()) {
398 ui->actionLoad->setEnabled(true);
405 * Loads a voltage preset by calling kernel-config.
407 * Available presets are:
413 * - custom -> any preset named "custom"
415 void MainWindow::loadPreset(QString presetName)
417 #if defined(Q_WS_MAEMO_5)
418 callHelper("loadpreset", presetName);
419 QMaemo5InformationBox::information(this, tr( "The preset was loaded." ), QMaemo5InformationBox::DefaultTimeout);
425 * Reads any file in /sys/
427 * \param sys_file : full path to sys file - omit "/sys/"
428 * \return content of sys file
430 QString MainWindow::readSysFile(QString sys_file)
432 QFile file( "/sys/"+sys_file );
435 if ( !file.exists() || !file.open( QIODevice::ReadOnly ) ) {
436 QMessageBox::critical(this, tr("QCPUFreq"), tr("Could not get information from /sys!"));
441 QTextStream in( &file );
442 QString txt = in.readLine();
452 * Refreshes all of the values to display
454 void MainWindow::refresh()
456 //get the current frequency and calculate the MHz value
457 int freq = ( getMinFreq() / 1000 );
459 display.setNum( freq );
460 display.append( " MHz" );
461 ui->freq_min->setText( display );
463 //do the same thing for the maximum frequency
464 freq = ( getMaxFreq() / 1000 );
465 display.setNum( freq );
466 display.append( " MHz" );
467 ui->freq_max->setText( display );
469 //display the current governor
470 ui->freq_governor->setText( getScalingGovernor() );
472 //display current temperature
473 ui->cpu_temp->setText( getCPUTemp() );
475 //smart reflex button
476 if ( getSmartReflexState() == 1 )
477 ui->sr_box->setCheckState( Qt::Checked );
479 ui->sr_box->setCheckState( Qt::Unchecked );
482 //display frequency slider
483 ui->freq_adjust->setMinimum( 1 );
484 ui->freq_adjust->setMaximum( getScalingSteps() );
485 ui->freq_adjust->setSliderPosition( getScalingStep(getMaxFreq()) );
490 * Repaints part of the GUI after the device was rotated
492 void MainWindow::orientationChanged()
496 //check whether we are using portrait or landscape mode
497 if ( usePortrait() ) {
498 //in portrait mode we want to display the large image
499 image.load( ":/img/chip256" );
501 scene.addPixmap( image );
503 ui->graphicsPortrait->setScene( &scene );
504 ui->graphicsPortrait->setMaximumSize( 256, 256 );
505 ui->graphicsLandscape->setMaximumSize( 0, 0 );
507 image.load( ":/img/chip128" );
509 scene.addPixmap( image );
511 ui->graphicsLandscape->setScene( &scene );
512 ui->graphicsLandscape->setMaximumSize( 128, 128 );
513 ui->graphicsPortrait->setMaximumSize( 0, 0 );
519 * Saves the current maximim frequency as default (only on power kernel).
521 void MainWindow::save()
523 if (settings->usePowerKernel()) {
524 callHelper( "save", "null" );
525 #if defined(Q_WS_MAEMO_5)
526 QMaemo5InformationBox::information(this, tr( "The current frequency settings have been saved as default." ), QMaemo5InformationBox::DefaultTimeout);
533 * Checks the settings if the "bq27x00_battery" needs to be loaded.
535 void MainWindow::setAdvancedTemperature()
537 if (settings->usePowerKernel() && settings->useAdvancedTemperature()) {
538 callHelper( "load_bq27", "null" );
544 * Enables or disables the auto-rotation feature of Maemo5 devices.
546 void MainWindow::setAutoRotation()
548 #if defined(Q_WS_MAEMO_5)
549 setAttribute(Qt::WA_Maemo5AutoOrientation, settings->useAutoRotate());
550 loadPresetDialog->setAttribute(Qt::WA_Maemo5AutoOrientation, settings->useAutoRotate());
551 settings->setAttribute(Qt::WA_Maemo5AutoOrientation, settings->useAutoRotate());
557 * SLOT: Enables or disables Smart Reflex(tm) after pressing sr_btn
559 void MainWindow::setSmartReflex()
561 //SmartReflex is only supported on Maemo5
562 #if defined(Q_WS_MAEMO_5)
563 if ( getSmartReflexState() == 1 )
564 callHelper( "set_sr", "off");
566 QMaemo5InformationBox::information(this, tr( "SmartReflex support is known to be unstable on some devices and may cause random reboots." ), 0);
567 callHelper( "set_sr", "on");
577 * SLOT: display the help window
579 void MainWindow::showHelp()
586 * SLOT: displays the settings widget
588 void MainWindow::showSettings()
596 * SLOT: This temporarily updates the maximum frequency while using the
599 void MainWindow::showTemporaryMaxFreq()
601 //calulate frequency from slider position
602 int newmax = getScalingFreq( ui->freq_adjust->sliderPosition() ) / 1000;
603 //convert it to a string and display it in the UI
605 display.setNum( newmax );
606 display.append( " MHz" );
607 ui->freq_max->setText( display );
612 * Returns true when the device is in portrait mode
614 bool MainWindow::usePortrait()
616 QRect screenGeometry = QApplication::desktop()->screenGeometry();
617 if (screenGeometry.width() > screenGeometry.height())