2 * QCPUFreq - a simple cpufreq GUI
3 * Copyright (C) 2010 Daniel Klaffenbach <daniel.klaffenbach@cs.tu-chemnitz.de>
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 "0.3.3"
33 MainWindow::MainWindow(QWidget *parent) :
35 ui(new Ui::MainWindow),
36 //do not allow overclocking per default
37 allowOverclocking(false),
38 //create helper process
39 helperProcess( this ),
40 //create a new, stackable help window
44 //create UI refresh timer
46 //create a QGraphicsScene for the little chip icon
48 //show errors about the sudo setup only once
51 //this is a stacked window on Maemo 5
52 #if defined(Q_WS_MAEMO_5)
53 setAttribute(Qt::WA_Maemo5StackedWindow);
60 // enable auto rotation
63 //initialize orientation
66 //refresh UI every 10 seconds
67 refreshTimer.start( 10000 );
69 // initialize stackable help window
70 #if defined(Q_WS_MAEMO_5)
71 helpWindow.setAttribute(Qt::WA_Maemo5StackedWindow);
73 helpWindow.setWindowFlags( windowFlags() | Qt::Window );
75 //connect signals and slots
76 connect(ui->actionHelp, SIGNAL(triggered()), this, SLOT(showHelp()));
77 connect( ui->actionAbout, SIGNAL(triggered()), this, SLOT(about()) );
78 connect( ui->freq_adjust, SIGNAL(valueChanged(int)), this, SLOT(adjustFreq()) );
79 connect(QApplication::desktop(), SIGNAL(resized(int)), this, SLOT(orientationChanged()));
80 connect(ui->sr_box, SIGNAL(clicked()), this, SLOT(setSmartReflex()));
81 connect(&refreshTimer, SIGNAL(timeout()), this, SLOT(refresh()));
82 connect(ui->actionOverclocking, SIGNAL(toggled(bool)), this, SLOT(setOverclocking()));
84 //disable overclocking button on vanilla kernels
85 if ( getScalingFreq(0) <= 600000 ) {
86 ui->actionOverclocking->setDisabled(true);
91 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() );
115 //maxfreq should not be smaller than minfreq, because we do not want to decrease minfreq
116 if (newmax < getMinFreq())
117 newmax = getMinFreq();
119 max.setNum( newmax );
121 //check for overclocking
122 #if defined(Q_WS_MAEMO_5)
123 if (this->allowOverclocking == false && newmax > 600000) {
124 QMaemo5InformationBox::information(this, tr( "You need to enable overclocking in QCPUFreq's menu for setting frequencies above 600MHz!"), 0);
130 callHelper( "set_maxfreq", max );
137 * Calls the QCPUFreq helper script with "sudo action param"
139 * @param action : the action of the helper script
140 * @param param : the parameter for the action
143 int MainWindow::callHelper(QString action, QString param)
145 QStringList arguments;
147 #if defined(Q_WS_MAEMO_5)
148 //On Maemo 5 the helper script resides in /opt/usr/bin, which is usually not in $PATH
149 arguments.append( "/opt/usr/bin/QCPUFreq.helper" );
151 arguments.append( "QCPUFreq.helper" );
154 arguments.append( action );
155 arguments.append( param );
157 helperProcess.start( "sudo", arguments, QIODevice::NotOpen );
159 if ( showSudoError && !helperProcess.waitForFinished( 400 )) {
160 //do not show this error again
161 showSudoError = false;
162 QMessageBox::critical(this, tr("QCPUFreq"), tr("There seems to be a problem with your sudo setup!"));
165 return helperProcess.exitCode();
170 * Returns the current CPU temperature
172 QString MainWindow::getCPUTemp()
174 #if defined(Q_WS_MAEMO_5)
175 QFile file( "/sys/class/power_supply/bq27200-0/temp" );
177 //check if we can read a more accurate temperature (only for power kernel)
179 return QString( readSysFile( "class/power_supply/bq27200-0/temp" ) + " " + QString::fromUtf8("\302\260") + "C" );
182 We actually only need to read the raw temperature, but it appears that by also reading temp1_input
183 the raw temperature (temp1_input_raw) is being updated more frequently.
185 readSysFile( "devices/platform/omap34xx_temp/temp1_input" );
187 //read the current system temperature
188 QString tstring = readSysFile( "devices/platform/omap34xx_temp/temp1_input_raw" );
190 return tr( "Unknown" );
192 //convert it to an integer and calculate the approx. temperature from the raw value
193 int tint = tstring.toInt();
194 tint = ( 0.65 * tint );
195 tstring.setNum(tint);
196 return QString( tstring + " " + QString::fromUtf8("\302\260") + "C" );
199 return tr( "Unknown" );
204 * Returns the maximum CPU frequency
206 int MainWindow::getMaxFreq()
208 QString tmp = readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_max_freq" );
214 * Returns the minimum CPU frequency
216 int MainWindow::getMinFreq()
218 if (this->minFreq == 0) {
219 QString min = readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_min_freq" );
220 //check if avoid file exists (only on power kernel)
221 QFile file( "/sys/devices/system/cpu/cpu0/cpufreq/ondemand/avoid_frequencies" );
223 QString avoid = readSysFile( "devices/system/cpu/cpu0/cpufreq/ondemand/avoid_frequencies" );
224 QStringList avoidList = avoid.split( " " );
226 //check if min is in avoid_frequencies
227 for (int i = getScalingStep( min.toInt() ); i>0; --i) {
228 if (!avoidList.contains(min.setNum( getScalingFreq(i) ))) {
229 this->minFreq = min.toInt();
230 return this->minFreq;
234 //should not happen at all
235 this->minFreq = 125000;
236 return this->minFreq;
238 this->minFreq = min.toInt();
239 return this->minFreq;
242 return this->minFreq;
248 * Returns the CPU frequency for the specified scaling step
250 int MainWindow::getScalingFreq(int step)
252 QString tmp = readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies" );
253 QStringList freqs = tmp.split( " " );
257 if ( step > getScalingSteps() )
258 step = getScalingSteps();
266 * Returns the name of the current CPU frequency scaling governor
268 * \return name of governor
270 QString MainWindow::getScalingGovernor()
272 return readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_governor" );
277 * Returns the amount of available scaling steps.
279 int MainWindow::getScalingSteps()
281 QString tmp = readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies" );
282 QStringList freqs = tmp.split( " " );
283 return (freqs.size() - 1);
288 * Returns the scaling step for the specified frequency.
290 int MainWindow::getScalingStep( int freq )
292 for( int i = 1; i <= getScalingSteps(); ++i ) {
293 if ( getScalingFreq(i) == freq )
302 * Returns the SmartReflex(tm) state
306 int MainWindow::getSmartReflexState()
308 //SmartReflex is only supprted on Maemo5
309 #if defined(Q_WS_MAEMO_5)
310 QString tmp = readSysFile( "power/sr_vdd1_autocomp" );
317 //disable UI checkbox
318 ui->sr_box->setDisabled( true );
326 * Reads any file in /sys/
328 * \param sys_file : full path to sys file - omit "/sys/"
329 * \return content of sys file
331 QString MainWindow::readSysFile(QString sys_file)
333 QFile file( "/sys/"+sys_file );
336 if ( !file.exists() || !file.open( QIODevice::ReadOnly ) ) {
337 QMessageBox::critical(this, tr("QCPUFreq"), tr("Could not get information from /sys!"));
342 QTextStream in( &file );
343 QString txt = in.readLine();
353 * Refreshes all of the values to display
355 void MainWindow::refresh()
357 //get the current frequency and calculate the MHz value
358 int freq = ( getMinFreq() / 1000 );
360 display.setNum( freq );
361 display.append( " MHz" );
362 ui->freq_min->setText( display );
364 //do the same thing for the maximum frequency
365 freq = ( getMaxFreq() / 1000 );
366 display.setNum( freq );
367 display.append( " MHz" );
368 ui->freq_max->setText( display );
370 //display the current governor
371 ui->freq_governor->setText( getScalingGovernor() );
373 //display current temperature
374 ui->cpu_temp->setText( getCPUTemp() );
376 //smart reflex button
377 if ( getSmartReflexState() == 1 )
378 ui->sr_box->setCheckState( Qt::Checked );
380 ui->sr_box->setCheckState( Qt::Unchecked );
383 //display frequency slider
384 ui->freq_adjust->setMinimum( 1 );
385 ui->freq_adjust->setMaximum( getScalingSteps() );
386 ui->freq_adjust->setInvertedAppearance( true );
387 ui->freq_adjust->setSliderPosition( getScalingStep(getMaxFreq()) );
389 //ui->retranslateUi(this);
394 * Repaints part of the GUI after the device was rotated
396 void MainWindow::orientationChanged()
400 //check whether we are using portrait or landscape mode
401 if ( usePortrait() ) {
402 //in portrait mode we want to display the large image
403 image.load( ":/img/chip256" );
405 scene.addPixmap( image );
407 ui->graphicsPortrait->setScene( &scene );
408 ui->graphicsPortrait->setMaximumSize( 256, 256 );
409 ui->graphicsLandscape->setMaximumSize( 0, 0 );
411 image.load( ":/img/chip128" );
413 scene.addPixmap( image );
415 ui->graphicsLandscape->setScene( &scene );
416 ui->graphicsLandscape->setMaximumSize( 128, 128 );
417 ui->graphicsPortrait->setMaximumSize( 0, 0 );
423 * Enables the auto-rotation feature of Maemo5 devices
425 void MainWindow::setAutoRotation()
427 #if defined(Q_WS_MAEMO_5)
428 setAttribute(Qt::WA_Maemo5AutoOrientation, true);
434 * SLOT: enable/disable overclocking.
436 void MainWindow::setOverclocking()
438 if (ui->actionOverclocking->isChecked()) {
439 #if defined(Q_WS_MAEMO_5)
440 QMaemo5InformationBox::information(this, tr( "Please note that overclocking voids your warranty and may break your device! Be careful!"), 0);
442 this->allowOverclocking = true;
444 this->allowOverclocking = false;
450 * SLOT: Enables or disables Smart Reflex(tm) after pressing sr_btn
452 void MainWindow::setSmartReflex()
454 //SmartReflex is only supported on Maemo5
455 #if defined(Q_WS_MAEMO_5)
456 if ( getSmartReflexState() == 1 )
457 callHelper( "set_sr", "off");
459 QMaemo5InformationBox::information(this, tr( "SmartReflex support is known to be unstable on some devices and may cause random reboots." ), QMaemo5InformationBox::DefaultTimeout);
460 callHelper( "set_sr", "on");
470 * SLOT: display the help window
472 void MainWindow::showHelp()
479 * Returns true when the device is in portrait mode
481 bool MainWindow::usePortrait()
483 QRect screenGeometry = QApplication::desktop()->screenGeometry();
484 if (screenGeometry.width() > screenGeometry.height())