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 "0.3.99"
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;
59 //applies the settings from the settings dialog
62 //initialize orientation
65 //refresh UI every 10 seconds
66 refreshTimer.start( 10000 );
68 // initialize stackable help window
69 #if defined(Q_WS_MAEMO_5)
70 helpWindow.setAttribute(Qt::WA_Maemo5StackedWindow);
72 helpWindow.setWindowFlags( windowFlags() | Qt::Window );
74 //show errors about the sudo setup only once
77 //connect signals and slots
78 connect(ui->actionHelp, SIGNAL(triggered()), this, SLOT(showHelp()));
79 connect( ui->actionAbout, SIGNAL(triggered()), this, SLOT(about()) );
80 connect( ui->freq_adjust, SIGNAL(valueChanged(int)), this, SLOT(adjustFreq()) );
81 connect(QApplication::desktop(), SIGNAL(resized(int)), this, SLOT(orientationChanged()));
82 connect(ui->sr_box, SIGNAL(clicked()), this, SLOT(setSmartReflex()));
83 connect(&refreshTimer, SIGNAL(timeout()), this, SLOT(refresh()));
84 connect(ui->actionSave, SIGNAL(triggered()), this, SLOT(save()));
85 connect(ui->actionSettings, SIGNAL(triggered()), this, SLOT(showSettings()));
86 connect(settings, SIGNAL(settingsChanged()), this, SLOT(applySettings()));
90 MainWindow::~MainWindow()
98 * SLOT: Displays an about box
100 void MainWindow::about()
102 QMessageBox::about(this, APPNAME " " APPVERSION, "<p style=\"align:center;\">© 2010 Daniel Klaffenbach</p>" );
108 * SLOT: Adjusts the maximum CPU frequency according to the scaler
110 void MainWindow::adjustFreq()
112 int newmax = getScalingFreq( ui->freq_adjust->sliderPosition() );
114 if (newmax == getMaxFreq() ) {
115 //we do not need to change anything in this case
121 //maxfreq should not be smaller than minfreq, because we do not want to decrease minfreq
122 if (newmax < getMinFreq())
123 newmax = getMinFreq();
125 max.setNum( newmax );
127 //check for overclocking
128 #if defined(Q_WS_MAEMO_5)
129 if (!settings->useOverclocking() && newmax > 600000) {
130 QMaemo5InformationBox::information(this, tr( "You need to enable overclocking in QCPUFreq's settings in order to set frequencies above 600MHz!"), 0);
136 //check for 599MHz <-> 600MHz problem on power kernels
137 if (max == "600000" && settings->usePowerKernel()) {
138 //we really need to set the maximum to 599MHz
142 callHelper( "set_maxfreq", max );
149 * SLOT: applies the settings from the Settings dialog.
151 void MainWindow::applySettings()
154 setAdvancedTemperature();
156 //refresh the GUI after applying the settings
162 * Calls the QCPUFreq helper script with "sudo action param"
164 * @param action : the action of the helper script
165 * @param param : the parameter for the action
168 int MainWindow::callHelper(QString action, QString param)
170 QStringList arguments;
172 #if defined(Q_WS_MAEMO_5)
173 //On Maemo 5 the helper script resides in /opt/usr/bin, which is usually not in $PATH
174 arguments.append( "/opt/usr/bin/QCPUFreq.helper" );
176 arguments.append( "QCPUFreq.helper" );
179 arguments.append( action );
180 arguments.append( param );
182 helperProcess.start( "sudo", arguments, QIODevice::NotOpen );
184 if ( showSudoError && !helperProcess.waitForFinished( 400 )) {
185 //do not show this error again
186 showSudoError = false;
187 QMessageBox::critical(this, tr("QCPUFreq"), tr("There seems to be a problem with your sudo setup!"));
190 return helperProcess.exitCode();
195 * Returns the current CPU temperature
197 QString MainWindow::getCPUTemp()
199 #if defined(Q_WS_MAEMO_5)
200 QFile file( "/sys/class/power_supply/bq27200-0/temp" );
202 //check if we can read a more accurate temperature (only for power kernel)
204 return QString( readSysFile( "class/power_supply/bq27200-0/temp" ) + " " + QString::fromUtf8("\302\260") + "C" );
207 We actually only need to read the raw temperature, but it appears that by also reading temp1_input
208 the raw temperature (temp1_input_raw) is being updated more frequently.
210 readSysFile( "devices/platform/omap34xx_temp/temp1_input" );
212 //read the current system temperature
213 QString tstring = readSysFile( "devices/platform/omap34xx_temp/temp1_input_raw" );
215 return tr( "Unknown" );
217 //convert it to an integer and calculate the approx. temperature from the raw value
218 int tint = tstring.toInt();
219 tint = ( 0.65 * tint );
220 tstring.setNum(tint);
221 return QString( tstring + " " + QString::fromUtf8("\302\260") + "C" );
224 return tr( "Unknown" );
229 * Returns the maximum CPU frequency
231 int MainWindow::getMaxFreq()
233 QString tmp = readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_max_freq" );
239 * Returns the minimum CPU frequency
241 int MainWindow::getMinFreq()
243 return this->minFreq;
248 * Returns the CPU frequency for the specified scaling step
250 int MainWindow::getScalingFreq(int step)
255 if ( step > getScalingSteps() - 1 )
256 step = getScalingSteps() - 1;
258 return this->scalingFrequencies[ step ].toInt();
263 * Returns the name of the current CPU frequency scaling governor
265 * @return QString - name of governor
267 QString MainWindow::getScalingGovernor()
269 return readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_governor" );
274 * Returns the amount of available scaling steps.
278 int MainWindow::getScalingSteps()
280 return this->scalingSteps;
285 * Returns the scaling step for the specified frequency.
289 int MainWindow::getScalingStep( int freq )
293 return this->scalingFrequencies.indexOf(tmp) + 1;
298 * Returns the SmartReflex(tm) state
302 int MainWindow::getSmartReflexState()
304 //SmartReflex is only supprted on Maemo5
305 #if defined(Q_WS_MAEMO_5)
306 QString tmp = readSysFile( "power/sr_vdd1_autocomp" );
314 //disable UI checkbox
315 ui->sr_box->setDisabled( true );
323 * Initializes internal variables, such as:
325 * - scalingFrequencies
328 void MainWindow::init()
331 QString freqs = readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies" );
332 QStringList freqList = freqs.split( " " );
333 //change the order of the QStringList - last element becomes first
334 for (int i=freqList.size() - 1; i>=0; --i) {
335 if (freqList.at(i) != "")
336 this->scalingFrequencies << freqList.at(i);
338 this->scalingSteps = (this->scalingFrequencies.size());
340 //set minFreq and check avoid_frequencies
341 QString min = readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_min_freq" );
342 //check if avoid file exists (only on power kernel)
343 QFile file( "/sys/devices/system/cpu/cpu0/cpufreq/ondemand/avoid_frequencies" );
345 QString avoid = readSysFile( "devices/system/cpu/cpu0/cpufreq/ondemand/avoid_frequencies" );
346 QStringList avoidList = avoid.split( " " );
348 //check if min is in avoid_frequencies
349 for (int i = getScalingStep( min.toInt() ); i <= this->scalingSteps; ++i) {
350 min.setNum( getScalingFreq(i) );
351 if (!avoidList.contains(min)) {
352 this->minFreq = min.toInt();
357 this->minFreq = min.toInt();
360 //enable save option on power kernels
361 if (settings->usePowerKernel()) {
362 ui->actionSave->setEnabled(true);
368 * Reads any file in /sys/
370 * \param sys_file : full path to sys file - omit "/sys/"
371 * \return content of sys file
373 QString MainWindow::readSysFile(QString sys_file)
375 QFile file( "/sys/"+sys_file );
378 if ( !file.exists() || !file.open( QIODevice::ReadOnly ) ) {
379 QMessageBox::critical(this, tr("QCPUFreq"), tr("Could not get information from /sys!"));
384 QTextStream in( &file );
385 QString txt = in.readLine();
395 * Refreshes all of the values to display
397 void MainWindow::refresh()
399 //get the current frequency and calculate the MHz value
400 int freq = ( getMinFreq() / 1000 );
402 display.setNum( freq );
403 display.append( " MHz" );
404 ui->freq_min->setText( display );
406 //do the same thing for the maximum frequency
407 freq = ( getMaxFreq() / 1000 );
408 display.setNum( freq );
409 display.append( " MHz" );
410 ui->freq_max->setText( display );
412 //display the current governor
413 ui->freq_governor->setText( getScalingGovernor() );
415 //display current temperature
416 ui->cpu_temp->setText( getCPUTemp() );
418 //smart reflex button
419 if ( getSmartReflexState() == 1 )
420 ui->sr_box->setCheckState( Qt::Checked );
422 ui->sr_box->setCheckState( Qt::Unchecked );
425 //display frequency slider
426 ui->freq_adjust->setMinimum( 1 );
427 ui->freq_adjust->setMaximum( getScalingSteps() );
428 ui->freq_adjust->setSliderPosition( getScalingStep(getMaxFreq()) );
433 * Repaints part of the GUI after the device was rotated
435 void MainWindow::orientationChanged()
439 //check whether we are using portrait or landscape mode
440 if ( usePortrait() ) {
441 //in portrait mode we want to display the large image
442 image.load( ":/img/chip256" );
444 scene.addPixmap( image );
446 ui->graphicsPortrait->setScene( &scene );
447 ui->graphicsPortrait->setMaximumSize( 256, 256 );
448 ui->graphicsLandscape->setMaximumSize( 0, 0 );
450 image.load( ":/img/chip128" );
452 scene.addPixmap( image );
454 ui->graphicsLandscape->setScene( &scene );
455 ui->graphicsLandscape->setMaximumSize( 128, 128 );
456 ui->graphicsPortrait->setMaximumSize( 0, 0 );
462 * Saves the current maximim frequency as default (only on power kernel).
464 void MainWindow::save()
466 if (settings->usePowerKernel()) {
467 callHelper( "save", "null" );
468 #if defined(Q_WS_MAEMO_5)
469 QMaemo5InformationBox::information(this, tr( "The current frequency settings have been saved as default." ), QMaemo5InformationBox::DefaultTimeout);
476 * Checks the settings if the "bq27x00_battery" needs to be loaded.
478 void MainWindow::setAdvancedTemperature()
480 if (settings->usePowerKernel() && settings->useAdvancedTemperature()) {
481 callHelper( "load_bq27", "null" );
487 * Enables or disables the auto-rotation feature of Maemo5 devices.
489 void MainWindow::setAutoRotation()
491 #if defined(Q_WS_MAEMO_5)
492 setAttribute(Qt::WA_Maemo5AutoOrientation, settings->useAutoRotate());
498 * SLOT: Enables or disables Smart Reflex(tm) after pressing sr_btn
500 void MainWindow::setSmartReflex()
502 //SmartReflex is only supported on Maemo5
503 #if defined(Q_WS_MAEMO_5)
504 if ( getSmartReflexState() == 1 )
505 callHelper( "set_sr", "off");
507 QMaemo5InformationBox::information(this, tr( "SmartReflex support is known to be unstable on some devices and may cause random reboots." ), 0);
508 callHelper( "set_sr", "on");
518 * SLOT: display the help window
520 void MainWindow::showHelp()
527 * SLOT: displays the settings widget
529 void MainWindow::showSettings()
537 * Returns true when the device is in portrait mode
539 bool MainWindow::usePortrait()
541 QRect screenGeometry = QApplication::desktop()->screenGeometry();
542 if (screenGeometry.width() > screenGeometry.height())