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;
60 // setup 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 //show errors about the sudo setup only once
78 //connect signals and slots
79 connect(ui->actionHelp, SIGNAL(triggered()), this, SLOT(showHelp()));
80 connect( ui->actionAbout, SIGNAL(triggered()), this, SLOT(about()) );
81 connect( ui->freq_adjust, SIGNAL(valueChanged(int)), this, SLOT(adjustFreq()) );
82 connect(QApplication::desktop(), SIGNAL(resized(int)), this, SLOT(orientationChanged()));
83 connect(ui->sr_box, SIGNAL(clicked()), this, SLOT(setSmartReflex()));
84 connect(&refreshTimer, SIGNAL(timeout()), this, SLOT(refresh()));
85 connect(ui->actionSettings, SIGNAL(triggered()), this, SLOT(showSettings()));
86 connect(settings, SIGNAL(settingsChanged()), this, SLOT(setAutoRotation()));
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 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 return this->minFreq;
229 * Returns the CPU frequency for the specified scaling step
231 int MainWindow::getScalingFreq(int step)
236 if ( step > getScalingSteps() - 1 )
237 step = getScalingSteps() - 1;
239 return this->scalingFrequencies[ step ].toInt();
244 * Returns the name of the current CPU frequency scaling governor
246 * @return QString - name of governor
248 QString MainWindow::getScalingGovernor()
250 return readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_governor" );
255 * Returns the amount of available scaling steps.
259 int MainWindow::getScalingSteps()
261 return this->scalingSteps;
266 * Returns the scaling step for the specified frequency.
270 int MainWindow::getScalingStep( int freq )
274 return this->scalingFrequencies.indexOf(tmp) + 1;
279 * Returns the SmartReflex(tm) state
283 int MainWindow::getSmartReflexState()
285 //SmartReflex is only supprted on Maemo5
286 #if defined(Q_WS_MAEMO_5)
287 QString tmp = readSysFile( "power/sr_vdd1_autocomp" );
295 //disable UI checkbox
296 ui->sr_box->setDisabled( true );
304 * Initializes internal variables, such as:
306 * - scalingFrequencies
309 void MainWindow::init()
312 QString freqs = readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies" );
313 QStringList freqList = freqs.split( " " );
314 //change the order of the QStringList - last element becomes first
315 for (int i=freqList.size() - 1; i>=0; --i) {
316 if (freqList.at(i) != "")
317 this->scalingFrequencies << freqList.at(i);
319 this->scalingSteps = (this->scalingFrequencies.size());
321 //set minFreq and check avoid_frequencies
322 QString min = readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_min_freq" );
323 //check if avoid file exists (only on power kernel)
324 QFile file( "/sys/devices/system/cpu/cpu0/cpufreq/ondemand/avoid_frequencies" );
326 QString avoid = readSysFile( "devices/system/cpu/cpu0/cpufreq/ondemand/avoid_frequencies" );
327 QStringList avoidList = avoid.split( " " );
329 //check if min is in avoid_frequencies
330 for (int i = getScalingStep( min.toInt() ); i <= this->scalingSteps; ++i) {
331 min.setNum( getScalingFreq(i) );
332 if (!avoidList.contains(min)) {
333 this->minFreq = min.toInt();
338 this->minFreq = min.toInt();
344 * Reads any file in /sys/
346 * \param sys_file : full path to sys file - omit "/sys/"
347 * \return content of sys file
349 QString MainWindow::readSysFile(QString sys_file)
351 QFile file( "/sys/"+sys_file );
354 if ( !file.exists() || !file.open( QIODevice::ReadOnly ) ) {
355 QMessageBox::critical(this, tr("QCPUFreq"), tr("Could not get information from /sys!"));
360 QTextStream in( &file );
361 QString txt = in.readLine();
371 * Refreshes all of the values to display
373 void MainWindow::refresh()
375 //get the current frequency and calculate the MHz value
376 int freq = ( getMinFreq() / 1000 );
378 display.setNum( freq );
379 display.append( " MHz" );
380 ui->freq_min->setText( display );
382 //do the same thing for the maximum frequency
383 freq = ( getMaxFreq() / 1000 );
384 display.setNum( freq );
385 display.append( " MHz" );
386 ui->freq_max->setText( display );
388 //display the current governor
389 ui->freq_governor->setText( getScalingGovernor() );
391 //display current temperature
392 ui->cpu_temp->setText( getCPUTemp() );
394 //smart reflex button
395 if ( getSmartReflexState() == 1 )
396 ui->sr_box->setCheckState( Qt::Checked );
398 ui->sr_box->setCheckState( Qt::Unchecked );
401 //display frequency slider
402 ui->freq_adjust->setMinimum( 1 );
403 ui->freq_adjust->setMaximum( getScalingSteps() );
404 ui->freq_adjust->setSliderPosition( getScalingStep(getMaxFreq()) );
409 * Repaints part of the GUI after the device was rotated
411 void MainWindow::orientationChanged()
415 //check whether we are using portrait or landscape mode
416 if ( usePortrait() ) {
417 //in portrait mode we want to display the large image
418 image.load( ":/img/chip256" );
420 scene.addPixmap( image );
422 ui->graphicsPortrait->setScene( &scene );
423 ui->graphicsPortrait->setMaximumSize( 256, 256 );
424 ui->graphicsLandscape->setMaximumSize( 0, 0 );
426 image.load( ":/img/chip128" );
428 scene.addPixmap( image );
430 ui->graphicsLandscape->setScene( &scene );
431 ui->graphicsLandscape->setMaximumSize( 128, 128 );
432 ui->graphicsPortrait->setMaximumSize( 0, 0 );
438 * Enables or disables the auto-rotation feature of Maemo5 devices.
440 void MainWindow::setAutoRotation()
442 #if defined(Q_WS_MAEMO_5)
443 setAttribute(Qt::WA_Maemo5AutoOrientation, settings->useAutoRotate());
449 * SLOT: Enables or disables Smart Reflex(tm) after pressing sr_btn
451 void MainWindow::setSmartReflex()
453 //SmartReflex is only supported on Maemo5
454 #if defined(Q_WS_MAEMO_5)
455 if ( getSmartReflexState() == 1 )
456 callHelper( "set_sr", "off");
458 QMaemo5InformationBox::information(this, tr( "SmartReflex support is known to be unstable on some devices and may cause random reboots." ), 0);
459 callHelper( "set_sr", "on");
469 * SLOT: display the help window
471 void MainWindow::showHelp()
478 * SLOT: displays the settings widget
480 void MainWindow::showSettings()
488 * Returns true when the device is in portrait mode
490 bool MainWindow::usePortrait()
492 QRect screenGeometry = QApplication::desktop()->screenGeometry();
493 if (screenGeometry.width() > screenGeometry.height())