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>
27 #if defined(Q_WS_MAEMO_5)
28 #include <QMaemo5InformationBox>
31 #define APPNAME "QCPUFreq"
32 #define APPVERSION "0.3.3"
34 MainWindow::MainWindow(QWidget *parent) :
36 ui(new Ui::MainWindow),
37 //do not allow overclocking per default
38 allowOverclocking(false),
39 //create helper process
40 helperProcess( this ),
41 //create a new, stackable help window
43 //create UI refresh timer
45 //create a QGraphicsScene for the little chip icon
47 //show errors about the sudo setup only once
50 //this is a stacked window on Maemo 5
51 #if defined(Q_WS_MAEMO_5)
52 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()));
85 //disable overclocking button on vanilla kernels
87 ui->actionOverclocking->setDisabled(true);
92 MainWindow::~MainWindow()
99 * SLOT: Displays an about box
101 void MainWindow::about()
103 QMessageBox::about(this, APPNAME " " APPVERSION, "<p style=\"align:center;\">© 2010 Daniel Klaffenbach</p>" );
109 * SLOT: Adjusts the maximum CPU frequency according to the scaler
111 void MainWindow::adjustFreq()
113 int newmax = getScalingFreq( ui->freq_adjust->sliderPosition() );
115 if (newmax == getMaxFreq() ) {
116 //we do not need to change anything in this case
122 //maxfreq should not be smaller than minfreq, because we do not want to decrease minfreq
123 if (newmax < getMinFreq())
124 newmax = getMinFreq();
126 max.setNum( newmax );
128 //check for overclocking
129 #if defined(Q_WS_MAEMO_5)
130 if (this->allowOverclocking == false && newmax > 600000) {
131 QMaemo5InformationBox::information(this, tr( "You need to enable overclocking in QCPUFreq's menu for setting frequencies above 600MHz!"), 0);
137 callHelper( "set_maxfreq", max );
144 * Calls the QCPUFreq helper script with "sudo action param"
146 * @param action : the action of the helper script
147 * @param param : the parameter for the action
150 int MainWindow::callHelper(QString action, QString param)
152 QStringList arguments;
154 #if defined(Q_WS_MAEMO_5)
155 //On Maemo 5 the helper script resides in /opt/usr/bin, which is usually not in $PATH
156 arguments.append( "/opt/usr/bin/QCPUFreq.helper" );
158 arguments.append( "QCPUFreq.helper" );
161 arguments.append( action );
162 arguments.append( param );
164 helperProcess.start( "sudo", arguments, QIODevice::NotOpen );
166 if ( showSudoError && !helperProcess.waitForFinished( 400 )) {
167 //do not show this error again
168 showSudoError = false;
169 QMessageBox::critical(this, tr("QCPUFreq"), tr("There seems to be a problem with your sudo setup!"));
172 return helperProcess.exitCode();
177 * Returns the current CPU temperature
179 QString MainWindow::getCPUTemp()
181 #if defined(Q_WS_MAEMO_5)
182 QFile file( "/sys/class/power_supply/bq27200-0/temp" );
184 //check if we can read a more accurate temperature (only for power kernel)
186 return QString( readSysFile( "class/power_supply/bq27200-0/temp" ) + " " + QString::fromUtf8("\302\260") + "C" );
189 We actually only need to read the raw temperature, but it appears that by also reading temp1_input
190 the raw temperature (temp1_input_raw) is being updated more frequently.
192 readSysFile( "devices/platform/omap34xx_temp/temp1_input" );
194 //read the current system temperature
195 QString tstring = readSysFile( "devices/platform/omap34xx_temp/temp1_input_raw" );
197 return tr( "Unknown" );
199 //convert it to an integer and calculate the approx. temperature from the raw value
200 int tint = tstring.toInt();
201 tint = ( 0.65 * tint );
202 tstring.setNum(tint);
203 return QString( tstring + " " + QString::fromUtf8("\302\260") + "C" );
206 return tr( "Unknown" );
211 * Returns the maximum CPU frequency
213 int MainWindow::getMaxFreq()
215 QString tmp = readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_max_freq" );
221 * Returns the minimum CPU frequency
223 int MainWindow::getMinFreq()
225 return this->minFreq;
230 * Returns the CPU frequency for the specified scaling step
232 int MainWindow::getScalingFreq(int step)
237 if ( step > getScalingSteps() - 1 )
238 step = getScalingSteps() - 1;
240 return this->scalingFrequencies[ step ].toInt();
245 * Returns the name of the current CPU frequency scaling governor
247 * @return QString - name of governor
249 QString MainWindow::getScalingGovernor()
251 return readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_governor" );
256 * Returns the amount of available scaling steps.
260 int MainWindow::getScalingSteps()
262 return this->scalingSteps;
267 * Returns the scaling step for the specified frequency.
271 int MainWindow::getScalingStep( int freq )
275 return this->scalingFrequencies.indexOf(tmp) + 1;
280 * Returns the SmartReflex(tm) state
284 int MainWindow::getSmartReflexState()
286 //SmartReflex is only supprted on Maemo5
287 #if defined(Q_WS_MAEMO_5)
288 QString tmp = readSysFile( "power/sr_vdd1_autocomp" );
296 //disable UI checkbox
297 ui->sr_box->setDisabled( true );
305 * Initializes internal variables, such as:
307 * - scalingFrequencies
311 void MainWindow::init()
314 QString freqs = readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies" );
315 QStringList freqList = freqs.split( " " );
316 //change the order of the QStringList - last element becomes first
317 for (int i=freqList.size() - 1; i>=0; --i) {
318 if (freqList.at(i) != "")
319 this->scalingFrequencies << freqList.at(i);
321 this->scalingSteps = (this->scalingFrequencies.size());
323 //set minFreq and check avoid_frequencies
324 QString min = readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_min_freq" );
326 //check if avoid file exists (only on power kernel)
327 QFile file( "/sys/devices/system/cpu/cpu0/cpufreq/ondemand/avoid_frequencies" );
329 QString avoid = readSysFile( "devices/system/cpu/cpu0/cpufreq/ondemand/avoid_frequencies" );
330 QStringList avoidList = avoid.split( " " );
332 //check if min is in avoid_frequencies
333 for (int i = getScalingStep( min.toInt() ); i <= this->scalingSteps; ++i) {
334 min.setNum( getScalingFreq(i) );
335 if (!avoidList.contains(min)) {
336 this->minFreq = min.toInt();
341 this->minFreq = min.toInt();
344 //check if we are using a power kernel
345 if ( getScalingFreq(getScalingSteps()) > 600000 ) {
346 this->powerKernel = true;
348 this->powerKernel = false;
354 * Reads any file in /sys/
356 * \param sys_file : full path to sys file - omit "/sys/"
357 * \return content of sys file
359 QString MainWindow::readSysFile(QString sys_file)
361 QFile file( "/sys/"+sys_file );
364 if ( !file.exists() || !file.open( QIODevice::ReadOnly ) ) {
365 QMessageBox::critical(this, tr("QCPUFreq"), tr("Could not get information from /sys!"));
370 QTextStream in( &file );
371 QString txt = in.readLine();
381 * Refreshes all of the values to display
383 void MainWindow::refresh()
385 //get the current frequency and calculate the MHz value
386 int freq = ( getMinFreq() / 1000 );
388 display.setNum( freq );
389 display.append( " MHz" );
390 ui->freq_min->setText( display );
392 //do the same thing for the maximum frequency
393 freq = ( getMaxFreq() / 1000 );
394 display.setNum( freq );
395 display.append( " MHz" );
396 ui->freq_max->setText( display );
398 //display the current governor
399 ui->freq_governor->setText( getScalingGovernor() );
401 //display current temperature
402 ui->cpu_temp->setText( getCPUTemp() );
404 //smart reflex button
405 if ( getSmartReflexState() == 1 )
406 ui->sr_box->setCheckState( Qt::Checked );
408 ui->sr_box->setCheckState( Qt::Unchecked );
411 //display frequency slider
412 ui->freq_adjust->setMinimum( 1 );
413 ui->freq_adjust->setMaximum( getScalingSteps() );
414 //ui->freq_adjust->setInvertedAppearance( true );
415 ui->freq_adjust->setSliderPosition( getScalingStep(getMaxFreq()) );
417 //ui->retranslateUi(this);
422 * Repaints part of the GUI after the device was rotated
424 void MainWindow::orientationChanged()
428 //check whether we are using portrait or landscape mode
429 if ( usePortrait() ) {
430 //in portrait mode we want to display the large image
431 image.load( ":/img/chip256" );
433 scene.addPixmap( image );
435 ui->graphicsPortrait->setScene( &scene );
436 ui->graphicsPortrait->setMaximumSize( 256, 256 );
437 ui->graphicsLandscape->setMaximumSize( 0, 0 );
439 image.load( ":/img/chip128" );
441 scene.addPixmap( image );
443 ui->graphicsLandscape->setScene( &scene );
444 ui->graphicsLandscape->setMaximumSize( 128, 128 );
445 ui->graphicsPortrait->setMaximumSize( 0, 0 );
451 * Enables the auto-rotation feature of Maemo5 devices
453 void MainWindow::setAutoRotation()
455 #if defined(Q_WS_MAEMO_5)
456 setAttribute(Qt::WA_Maemo5AutoOrientation, true);
462 * SLOT: enable/disable overclocking.
464 void MainWindow::setOverclocking()
466 if (ui->actionOverclocking->isChecked()) {
467 #if defined(Q_WS_MAEMO_5)
468 QMaemo5InformationBox::information(this, tr( "Please note that overclocking voids your warranty and may break your device! Be careful!"), 0);
470 this->allowOverclocking = true;
472 this->allowOverclocking = false;
478 * SLOT: Enables or disables Smart Reflex(tm) after pressing sr_btn
480 void MainWindow::setSmartReflex()
482 //SmartReflex is only supported on Maemo5
483 #if defined(Q_WS_MAEMO_5)
484 if ( getSmartReflexState() == 1 )
485 callHelper( "set_sr", "off");
487 QMaemo5InformationBox::information(this, tr( "SmartReflex support is known to be unstable on some devices and may cause random reboots." ), 0);
488 callHelper( "set_sr", "on");
498 * SLOT: display the help window
500 void MainWindow::showHelp()
507 * Returns true when the device is in portrait mode
509 bool MainWindow::usePortrait()
511 QRect screenGeometry = QApplication::desktop()->screenGeometry();
512 if (screenGeometry.width() > screenGeometry.height())