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();
61 //enable save and load option on power kernels
62 if (settings->usePowerKernel() && settings->isKernelConfigInstalled()) {
63 ui->actionSave->setEnabled(true);
64 //loading presets may cause overclocking - only enable it if overclokcing is enabled
65 if (settings->useOverclocking()) {
66 ui->actionLoad->setEnabled(true);
70 //display the correct minimum frequency
73 //applies the settings from the settings dialog
76 //initialize orientation
79 //refresh UI every 10 seconds
80 refreshTimer.start( 10000 );
82 // initialize stackable help window
83 #if defined(Q_WS_MAEMO_5)
84 helpWindow.setAttribute(Qt::WA_Maemo5StackedWindow);
86 helpWindow.setWindowFlags( windowFlags() | Qt::Window );
88 //show errors about the sudo setup only once
91 //connect signals and slots
92 connect(ui->actionHelp, SIGNAL(triggered()), this, SLOT(showHelp()));
93 connect( ui->actionAbout, SIGNAL(triggered()), this, SLOT(about()) );
94 connect( ui->freq_adjust, SIGNAL(sliderReleased()), this, SLOT(adjustFreq()) );
95 connect(ui->freq_adjust, SIGNAL(valueChanged(int)), this, SLOT(showTemporaryMaxFreq()));
96 connect(QApplication::desktop(), SIGNAL(resized(int)), this, SLOT(orientationChanged()));
97 connect(ui->sr_box, SIGNAL(clicked()), this, SLOT(setSmartReflex()));
98 connect(&refreshTimer, SIGNAL(timeout()), this, SLOT(refresh()));
99 connect(ui->actionSave, SIGNAL(triggered()), this, SLOT(save()));
100 connect(ui->actionLoad, SIGNAL(triggered()), loadPresetDialog, SLOT(show()));
101 connect(ui->actionSettings, SIGNAL(triggered()), this, SLOT(showSettings()));
102 connect(settings, SIGNAL(settingsChanged()), this, SLOT(applySettings()));
103 connect(loadPresetDialog, SIGNAL(load(QString)), this, SLOT(loadPreset(QString)));
107 MainWindow::~MainWindow()
109 delete loadPresetDialog;
116 * SLOT: Displays an about box
118 void MainWindow::about()
120 QMessageBox::about(this, APPNAME " " APPVERSION, "<p style=\"align:center;\">© 2010 Daniel Klaffenbach</p>" );
126 * SLOT: Adjusts the maximum CPU frequency according to the scaler
128 void MainWindow::adjustFreq()
130 int newmax = getScalingFreq( ui->freq_adjust->sliderPosition() );
132 if (newmax == getMaxFreq() ) {
133 //we do not need to change anything in this case
139 //maxfreq should not be smaller than minfreq, because we do not want to decrease minfreq
140 if (newmax < getMinFreq())
141 newmax = getMinFreq();
143 max.setNum( newmax );
145 //check for overclocking
146 #if defined(Q_WS_MAEMO_5)
147 if (!settings->useOverclocking() && newmax > 600000) {
148 QMaemo5InformationBox::information(this, tr( "You need to enable overclocking in QCPUFreq's settings in order to set frequencies above 600MHz!"), 0);
154 //check for 599MHz <-> 600MHz problem on power kernels
155 if (max == "600000" && settings->usePowerKernel()) {
156 //we really need to set the maximum to 599MHz
160 if (settings->useConfirmation()) {
162 box.setAttribute(Qt::WA_Maemo5AutoOrientation, settings->useAutoRotate());
163 box.setStandardButtons(QMessageBox::Apply | QMessageBox::Cancel);
164 box.setDefaultButton(QMessageBox::Apply);
165 box.setIcon(QMessageBox::Question);
167 verboseMax.setNum( newmax/1000 );
168 box.setText( tr("Do you really want to use %1 MHz as the new maximum frequency?").arg(verboseMax) );
169 int ret = box.exec();
171 if (ret != QMessageBox::Apply) {
177 callHelper( "set_maxfreq", max );
184 * SLOT: applies the settings from the Settings dialog.
186 void MainWindow::applySettings()
189 setAdvancedTemperature();
191 //if overclocking is/was enabled we can also enable the "Load preset" option
192 if (settings->useOverclocking() && settings->usePowerKernel() && settings->isKernelConfigInstalled()) {
193 ui->actionLoad->setEnabled(true);
195 ui->actionLoad->setEnabled(false);
198 //refresh the GUI after applying the settings
204 * Calculates the minimum frequency according to scaling_min_freq and avoid_frequencies.
206 * Since this is a somewhat complex calculation it sould only be performed when it is
207 * really necessary (on startup, after loading presets, etc.).
209 void MainWindow::calculateMinFreq()
212 QString freqs = readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies" );
213 QStringList freqList = freqs.split( " " );
214 //change the order of the QStringList - last element becomes first
215 for (int i=freqList.size() - 1; i>=0; --i) {
216 if (freqList.at(i) != "")
217 this->scalingFrequencies << freqList.at(i);
219 this->scalingSteps = (this->scalingFrequencies.size());
221 //set minFreq and check avoid_frequencies
222 QString min = readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_min_freq" );
223 //check if avoid file exists (only on power kernel)
224 QFile file( "/sys/devices/system/cpu/cpu0/cpufreq/ondemand/avoid_frequencies" );
226 QString avoid = readSysFile( "devices/system/cpu/cpu0/cpufreq/ondemand/avoid_frequencies" );
227 QStringList avoidList = avoid.split( " " );
229 //check if min is in avoid_frequencies
230 for (int i = getScalingStep( min.toInt() ); i <= this->scalingSteps; ++i) {
231 min.setNum( getScalingFreq(i) );
232 if (!avoidList.contains(min)) {
233 this->minFreq = min.toInt();
238 this->minFreq = min.toInt();
245 * Calls the QCPUFreq helper script with "sudo action param"
247 * @param action : the action of the helper script
248 * @param param : the parameter for the action
251 int MainWindow::callHelper(QString action, QString param)
253 QStringList arguments;
255 #if defined(Q_WS_MAEMO_5)
256 //On Maemo 5 the helper script resides in /opt/usr/bin, which is usually not in $PATH
257 arguments.append( "/opt/usr/bin/QCPUFreq.helper" );
259 arguments.append( "QCPUFreq.helper" );
262 arguments.append( action );
263 arguments.append( param );
265 helperProcess.start( "sudo", arguments, QIODevice::NotOpen );
267 if ( showSudoError && !helperProcess.waitForFinished( 2000 )) {
268 //do not show this error again
269 showSudoError = false;
270 QMessageBox::critical(this, tr("QCPUFreq"), tr("There seems to be a problem with your sudo setup!"));
273 return helperProcess.exitCode();
278 * Returns the current CPU temperature
280 QString MainWindow::getCPUTemp()
282 #if defined(Q_WS_MAEMO_5)
283 QFile file( "/sys/class/power_supply/bq27200-0/temp" );
285 //check if we can read a more accurate temperature (only for power kernel)
287 return QString( readSysFile( "class/power_supply/bq27200-0/temp" ) + " " + QString::fromUtf8("\302\260") + "C" );
290 We actually only need to read the raw temperature, but it appears that by also reading temp1_input
291 the raw temperature (temp1_input_raw) is being updated more frequently.
293 readSysFile( "devices/platform/omap34xx_temp/temp1_input" );
295 //read the current system temperature
296 QString tstring = readSysFile( "devices/platform/omap34xx_temp/temp1_input_raw" );
298 return tr( "Unknown" );
300 //convert it to an integer and calculate the approx. temperature from the raw value
301 int tint = tstring.toInt();
302 tint = ( 0.65 * tint );
303 tstring.setNum(tint);
304 return QString( tstring + " " + QString::fromUtf8("\302\260") + "C" );
307 return tr( "Unknown" );
312 * Returns the maximum CPU frequency
314 int MainWindow::getMaxFreq()
316 QString tmp = readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_max_freq" );
322 * Returns the minimum CPU frequency
324 int MainWindow::getMinFreq()
326 return this->minFreq;
331 * Returns the CPU frequency for the specified scaling step
333 int MainWindow::getScalingFreq(int step)
338 if ( step > getScalingSteps() - 1 )
339 step = getScalingSteps() - 1;
341 return this->scalingFrequencies[ step ].toInt();
346 * Returns the name of the current CPU frequency scaling governor
348 * @return QString - name of governor
350 QString MainWindow::getScalingGovernor()
352 return readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_governor" );
357 * Returns the amount of available scaling steps.
361 int MainWindow::getScalingSteps()
363 return this->scalingSteps;
368 * Returns the scaling step for the specified frequency.
372 int MainWindow::getScalingStep( int freq )
376 return this->scalingFrequencies.indexOf(tmp) + 1;
381 * Returns the SmartReflex(tm) state
385 int MainWindow::getSmartReflexState()
387 //SmartReflex is only supprted on Maemo5
388 #if defined(Q_WS_MAEMO_5)
389 QString tmp = readSysFile( "power/sr_vdd1_autocomp" );
397 //disable UI checkbox
398 ui->sr_box->setDisabled( true );
406 * Loads a voltage preset by calling kernel-config.
408 * Available presets are:
414 * - custom -> any preset named "custom"
416 void MainWindow::loadPreset(QString presetName)
418 #if defined(Q_WS_MAEMO_5)
419 callHelper("loadpreset", presetName);
421 QMaemo5InformationBox::information(this, tr( "The preset was loaded." ), QMaemo5InformationBox::DefaultTimeout);
427 * Reads any file in /sys/
429 * \param sys_file : full path to sys file - omit "/sys/"
430 * \return content of sys file
432 QString MainWindow::readSysFile(QString sys_file)
434 QFile file( "/sys/"+sys_file );
437 if ( !file.exists() || !file.open( QIODevice::ReadOnly ) ) {
438 QMessageBox::critical(this, tr("QCPUFreq"), tr("Could not get information from /sys!"));
443 QTextStream in( &file );
444 QString txt = in.readLine();
454 * Refreshes all of the values to display
456 void MainWindow::refresh()
458 //get the current frequency and calculate the MHz value
459 int freq = ( getMinFreq() / 1000 );
461 display.setNum( freq );
462 display.append( " MHz" );
463 ui->freq_min->setText( display );
465 //do the same thing for the maximum frequency
466 freq = ( getMaxFreq() / 1000 );
467 display.setNum( freq );
468 display.append( " MHz" );
469 ui->freq_max->setText( display );
471 //display the current governor
472 ui->freq_governor->setText( getScalingGovernor() );
474 //display current temperature
475 ui->cpu_temp->setText( getCPUTemp() );
477 //smart reflex button
478 if ( getSmartReflexState() == 1 )
479 ui->sr_box->setCheckState( Qt::Checked );
481 ui->sr_box->setCheckState( Qt::Unchecked );
484 //display frequency slider
485 ui->freq_adjust->setMinimum( 1 );
486 ui->freq_adjust->setMaximum( getScalingSteps() );
487 ui->freq_adjust->setSliderPosition( getScalingStep(getMaxFreq()) );
492 * Repaints part of the GUI after the device was rotated
494 void MainWindow::orientationChanged()
498 //check whether we are using portrait or landscape mode
499 if ( usePortrait() ) {
500 //in portrait mode we want to display the large image
501 image.load( ":/img/chip256" );
503 scene.addPixmap( image );
505 ui->graphicsPortrait->setScene( &scene );
506 ui->graphicsPortrait->setMaximumSize( 256, 256 );
507 ui->graphicsLandscape->setMaximumSize( 0, 0 );
509 image.load( ":/img/chip128" );
511 scene.addPixmap( image );
513 ui->graphicsLandscape->setScene( &scene );
514 ui->graphicsLandscape->setMaximumSize( 128, 128 );
515 ui->graphicsPortrait->setMaximumSize( 0, 0 );
521 * Saves the current maximim frequency as default (only on power kernel).
523 void MainWindow::save()
525 if (settings->usePowerKernel()) {
526 callHelper( "save", "null" );
527 #if defined(Q_WS_MAEMO_5)
528 QMaemo5InformationBox::information(this, tr( "The current frequency settings have been saved as default." ), QMaemo5InformationBox::DefaultTimeout);
535 * Checks the settings if the "bq27x00_battery" needs to be loaded.
537 void MainWindow::setAdvancedTemperature()
539 if (settings->usePowerKernel() && settings->useAdvancedTemperature()) {
540 callHelper( "load_bq27", "null" );
546 * Enables or disables the auto-rotation feature of Maemo5 devices.
548 void MainWindow::setAutoRotation()
550 #if defined(Q_WS_MAEMO_5)
551 setAttribute(Qt::WA_Maemo5AutoOrientation, settings->useAutoRotate());
552 loadPresetDialog->setAttribute(Qt::WA_Maemo5AutoOrientation, settings->useAutoRotate());
553 settings->setAttribute(Qt::WA_Maemo5AutoOrientation, settings->useAutoRotate());
559 * SLOT: Enables or disables Smart Reflex(tm) after pressing sr_btn
561 void MainWindow::setSmartReflex()
563 //SmartReflex is only supported on Maemo5
564 #if defined(Q_WS_MAEMO_5)
565 if ( getSmartReflexState() == 1 )
566 callHelper( "set_sr", "off");
568 QMaemo5InformationBox::information(this, tr( "SmartReflex support is known to be unstable on some devices and may cause random reboots." ), 0);
569 callHelper( "set_sr", "on");
579 * SLOT: display the help window
581 void MainWindow::showHelp()
588 * SLOT: displays the settings widget
590 void MainWindow::showSettings()
598 * SLOT: This temporarily updates the maximum frequency while using the
601 void MainWindow::showTemporaryMaxFreq()
603 //calulate frequency from slider position
604 int newmax = getScalingFreq( ui->freq_adjust->sliderPosition() ) / 1000;
605 //convert it to a string and display it in the UI
607 display.setNum( newmax );
608 display.append( " MHz" );
609 ui->freq_max->setText( display );
614 * Returns true when the device is in portrait mode
616 bool MainWindow::usePortrait()
618 QRect screenGeometry = QApplication::desktop()->screenGeometry();
619 if (screenGeometry.width() > screenGeometry.height())