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() );
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 (this->allowOverclocking == false && newmax > 600000) {
130 QMaemo5InformationBox::information(this, tr( "You need to enable overclocking in QCPUFreq's menu for setting frequencies above 600MHz!"), 0);
136 callHelper( "set_maxfreq", max );
143 * Calls the QCPUFreq helper script with "sudo action param"
145 * @param action : the action of the helper script
146 * @param param : the parameter for the action
149 int MainWindow::callHelper(QString action, QString param)
151 QStringList arguments;
153 #if defined(Q_WS_MAEMO_5)
154 //On Maemo 5 the helper script resides in /opt/usr/bin, which is usually not in $PATH
155 arguments.append( "/opt/usr/bin/QCPUFreq.helper" );
157 arguments.append( "QCPUFreq.helper" );
160 arguments.append( action );
161 arguments.append( param );
163 helperProcess.start( "sudo", arguments, QIODevice::NotOpen );
165 if ( showSudoError && !helperProcess.waitForFinished( 400 )) {
166 //do not show this error again
167 showSudoError = false;
168 QMessageBox::critical(this, tr("QCPUFreq"), tr("There seems to be a problem with your sudo setup!"));
171 return helperProcess.exitCode();
176 * Returns the current CPU temperature
178 QString MainWindow::getCPUTemp()
180 #if defined(Q_WS_MAEMO_5)
181 QFile file( "/sys/class/power_supply/bq27200-0/temp" );
183 //check if we can read a more accurate temperature (only for power kernel)
185 return QString( readSysFile( "class/power_supply/bq27200-0/temp" ) + " " + QString::fromUtf8("\302\260") + "C" );
188 We actually only need to read the raw temperature, but it appears that by also reading temp1_input
189 the raw temperature (temp1_input_raw) is being updated more frequently.
191 readSysFile( "devices/platform/omap34xx_temp/temp1_input" );
193 //read the current system temperature
194 QString tstring = readSysFile( "devices/platform/omap34xx_temp/temp1_input_raw" );
196 return tr( "Unknown" );
198 //convert it to an integer and calculate the approx. temperature from the raw value
199 int tint = tstring.toInt();
200 tint = ( 0.65 * tint );
201 tstring.setNum(tint);
202 return QString( tstring + " " + QString::fromUtf8("\302\260") + "C" );
205 return tr( "Unknown" );
210 * Returns the maximum CPU frequency
212 int MainWindow::getMaxFreq()
214 QString tmp = readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_max_freq" );
220 * Returns the minimum CPU frequency
222 int MainWindow::getMinFreq()
224 if (this->minFreq == 0) {
225 QString min = readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_min_freq" );
226 //check if avoid file exists (only on power kernel)
227 QFile file( "/sys/devices/system/cpu/cpu0/cpufreq/ondemand/avoid_frequencies" );
229 QString avoid = readSysFile( "devices/system/cpu/cpu0/cpufreq/ondemand/avoid_frequencies" );
230 QStringList avoidList = avoid.split( " " );
232 //check if min is in avoid_frequencies
233 for (int i = getScalingStep( min.toInt() ); i>0; --i) {
234 if (!avoidList.contains(min.setNum( getScalingFreq(i) ))) {
235 this->minFreq = min.toInt();
236 return this->minFreq;
240 //should not happen at all
241 this->minFreq = 125000;
242 return this->minFreq;
244 this->minFreq = min.toInt();
245 return this->minFreq;
248 return this->minFreq;
254 * Returns the CPU frequency for the specified scaling step
256 int MainWindow::getScalingFreq(int step)
258 QString tmp = readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies" );
259 QStringList freqs = tmp.split( " " );
263 if ( step > getScalingSteps() )
264 step = getScalingSteps();
272 * Returns the name of the current CPU frequency scaling governor
274 * @return QString - name of governor
276 QString MainWindow::getScalingGovernor()
278 return readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_governor" );
283 * Returns the amount of available scaling steps.
287 int MainWindow::getScalingSteps()
289 QString tmp = readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies" );
290 QStringList freqs = tmp.split( " " );
291 return (freqs.size() - 1);
296 * Returns the scaling step for the specified frequency.
300 int MainWindow::getScalingStep( int freq )
302 for( int i = 1; i <= getScalingSteps(); ++i ) {
303 if ( getScalingFreq(i) == freq )
312 * Returns the SmartReflex(tm) state
316 int MainWindow::getSmartReflexState()
318 //SmartReflex is only supprted on Maemo5
319 #if defined(Q_WS_MAEMO_5)
320 QString tmp = readSysFile( "power/sr_vdd1_autocomp" );
328 //disable UI checkbox
329 ui->sr_box->setDisabled( true );
337 * Reads any file in /sys/
339 * \param sys_file : full path to sys file - omit "/sys/"
340 * \return content of sys file
342 QString MainWindow::readSysFile(QString sys_file)
344 QFile file( "/sys/"+sys_file );
347 if ( !file.exists() || !file.open( QIODevice::ReadOnly ) ) {
348 QMessageBox::critical(this, tr("QCPUFreq"), tr("Could not get information from /sys!"));
353 QTextStream in( &file );
354 QString txt = in.readLine();
364 * Refreshes all of the values to display
366 void MainWindow::refresh()
368 //get the current frequency and calculate the MHz value
369 int freq = ( getMinFreq() / 1000 );
371 display.setNum( freq );
372 display.append( " MHz" );
373 ui->freq_min->setText( display );
375 //do the same thing for the maximum frequency
376 freq = ( getMaxFreq() / 1000 );
377 display.setNum( freq );
378 display.append( " MHz" );
379 ui->freq_max->setText( display );
381 //display the current governor
382 ui->freq_governor->setText( getScalingGovernor() );
384 //display current temperature
385 ui->cpu_temp->setText( getCPUTemp() );
387 //smart reflex button
388 if ( getSmartReflexState() == 1 )
389 ui->sr_box->setCheckState( Qt::Checked );
391 ui->sr_box->setCheckState( Qt::Unchecked );
394 //display frequency slider
395 ui->freq_adjust->setMinimum( 1 );
396 ui->freq_adjust->setMaximum( getScalingSteps() );
397 ui->freq_adjust->setInvertedAppearance( true );
398 ui->freq_adjust->setSliderPosition( getScalingStep(getMaxFreq()) );
400 //ui->retranslateUi(this);
405 * Repaints part of the GUI after the device was rotated
407 void MainWindow::orientationChanged()
411 //check whether we are using portrait or landscape mode
412 if ( usePortrait() ) {
413 //in portrait mode we want to display the large image
414 image.load( ":/img/chip256" );
416 scene.addPixmap( image );
418 ui->graphicsPortrait->setScene( &scene );
419 ui->graphicsPortrait->setMaximumSize( 256, 256 );
420 ui->graphicsLandscape->setMaximumSize( 0, 0 );
422 image.load( ":/img/chip128" );
424 scene.addPixmap( image );
426 ui->graphicsLandscape->setScene( &scene );
427 ui->graphicsLandscape->setMaximumSize( 128, 128 );
428 ui->graphicsPortrait->setMaximumSize( 0, 0 );
434 * Enables the auto-rotation feature of Maemo5 devices
436 void MainWindow::setAutoRotation()
438 #if defined(Q_WS_MAEMO_5)
439 setAttribute(Qt::WA_Maemo5AutoOrientation, true);
445 * SLOT: enable/disable overclocking.
447 void MainWindow::setOverclocking()
449 if (ui->actionOverclocking->isChecked()) {
450 #if defined(Q_WS_MAEMO_5)
451 QMaemo5InformationBox::information(this, tr( "Please note that overclocking voids your warranty and may break your device! Be careful!"), 0);
453 this->allowOverclocking = true;
455 this->allowOverclocking = false;
461 * SLOT: Enables or disables Smart Reflex(tm) after pressing sr_btn
463 void MainWindow::setSmartReflex()
465 //SmartReflex is only supported on Maemo5
466 #if defined(Q_WS_MAEMO_5)
467 if ( getSmartReflexState() == 1 )
468 callHelper( "set_sr", "off");
470 QMaemo5InformationBox::information(this, tr( "SmartReflex support is known to be unstable on some devices and may cause random reboots." ), 0);
471 callHelper( "set_sr", "on");
481 * SLOT: display the help window
483 void MainWindow::showHelp()
490 * Returns true when the device is in portrait mode
492 bool MainWindow::usePortrait()
494 QRect screenGeometry = QApplication::desktop()->screenGeometry();
495 if (screenGeometry.width() > screenGeometry.height())