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 "0.3.4"
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
42 //create UI refresh timer
44 //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);
61 // enable auto rotation
64 //initialize orientation
67 //refresh UI every 10 seconds
68 refreshTimer.start( 10000 );
70 // initialize stackable help window
71 #if defined(Q_WS_MAEMO_5)
72 helpWindow.setAttribute(Qt::WA_Maemo5StackedWindow);
74 helpWindow.setWindowFlags( windowFlags() | Qt::Window );
77 settings.setWindowFlags(Qt::Popup);
80 //connect signals and slots
81 connect(ui->actionHelp, SIGNAL(triggered()), this, SLOT(showHelp()));
82 connect( ui->actionAbout, SIGNAL(triggered()), this, SLOT(about()) );
83 connect( ui->freq_adjust, SIGNAL(valueChanged(int)), this, SLOT(adjustFreq()) );
84 connect(QApplication::desktop(), SIGNAL(resized(int)), this, SLOT(orientationChanged()));
85 connect(ui->sr_box, SIGNAL(clicked()), this, SLOT(setSmartReflex()));
86 connect(&refreshTimer, SIGNAL(timeout()), this, SLOT(refresh()));
87 connect(ui->actionOverclocking, SIGNAL(toggled(bool)), this, SLOT(setOverclocking()));
88 connect(ui->actionSettings, SIGNAL(triggered()), this, SLOT(showSettings()));
91 //disable overclocking button on vanilla kernels
93 ui->actionOverclocking->setDisabled(true);
98 MainWindow::~MainWindow()
105 * SLOT: Displays an about box
107 void MainWindow::about()
109 QMessageBox::about(this, APPNAME " " APPVERSION, "<p style=\"align:center;\">© 2010 Daniel Klaffenbach</p>" );
115 * SLOT: Adjusts the maximum CPU frequency according to the scaler
117 void MainWindow::adjustFreq()
119 int newmax = getScalingFreq( ui->freq_adjust->sliderPosition() );
121 if (newmax == getMaxFreq() ) {
122 //we do not need to change anything in this case
128 //maxfreq should not be smaller than minfreq, because we do not want to decrease minfreq
129 if (newmax < getMinFreq())
130 newmax = getMinFreq();
132 max.setNum( newmax );
134 //check for overclocking
135 #if defined(Q_WS_MAEMO_5)
136 if (this->allowOverclocking == false && newmax > 600000) {
137 QMaemo5InformationBox::information(this, tr( "You need to enable overclocking in QCPUFreq's menu for setting frequencies above 600MHz!"), 0);
143 callHelper( "set_maxfreq", max );
150 * Calls the QCPUFreq helper script with "sudo action param"
152 * @param action : the action of the helper script
153 * @param param : the parameter for the action
156 int MainWindow::callHelper(QString action, QString param)
158 QStringList arguments;
160 #if defined(Q_WS_MAEMO_5)
161 //On Maemo 5 the helper script resides in /opt/usr/bin, which is usually not in $PATH
162 arguments.append( "/opt/usr/bin/QCPUFreq.helper" );
164 arguments.append( "QCPUFreq.helper" );
167 arguments.append( action );
168 arguments.append( param );
170 helperProcess.start( "sudo", arguments, QIODevice::NotOpen );
172 if ( showSudoError && !helperProcess.waitForFinished( 400 )) {
173 //do not show this error again
174 showSudoError = false;
175 QMessageBox::critical(this, tr("QCPUFreq"), tr("There seems to be a problem with your sudo setup!"));
178 return helperProcess.exitCode();
183 * Returns the current CPU temperature
185 QString MainWindow::getCPUTemp()
187 #if defined(Q_WS_MAEMO_5)
188 QFile file( "/sys/class/power_supply/bq27200-0/temp" );
190 //check if we can read a more accurate temperature (only for power kernel)
192 return QString( readSysFile( "class/power_supply/bq27200-0/temp" ) + " " + QString::fromUtf8("\302\260") + "C" );
195 We actually only need to read the raw temperature, but it appears that by also reading temp1_input
196 the raw temperature (temp1_input_raw) is being updated more frequently.
198 readSysFile( "devices/platform/omap34xx_temp/temp1_input" );
200 //read the current system temperature
201 QString tstring = readSysFile( "devices/platform/omap34xx_temp/temp1_input_raw" );
203 return tr( "Unknown" );
205 //convert it to an integer and calculate the approx. temperature from the raw value
206 int tint = tstring.toInt();
207 tint = ( 0.65 * tint );
208 tstring.setNum(tint);
209 return QString( tstring + " " + QString::fromUtf8("\302\260") + "C" );
212 return tr( "Unknown" );
217 * Returns the maximum CPU frequency
219 int MainWindow::getMaxFreq()
221 QString tmp = readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_max_freq" );
227 * Returns the minimum CPU frequency
229 int MainWindow::getMinFreq()
231 return this->minFreq;
236 * Returns the CPU frequency for the specified scaling step
238 int MainWindow::getScalingFreq(int step)
243 if ( step > getScalingSteps() - 1 )
244 step = getScalingSteps() - 1;
246 return this->scalingFrequencies[ step ].toInt();
251 * Returns the name of the current CPU frequency scaling governor
253 * @return QString - name of governor
255 QString MainWindow::getScalingGovernor()
257 return readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_governor" );
262 * Returns the amount of available scaling steps.
266 int MainWindow::getScalingSteps()
268 return this->scalingSteps;
273 * Returns the scaling step for the specified frequency.
277 int MainWindow::getScalingStep( int freq )
281 return this->scalingFrequencies.indexOf(tmp) + 1;
286 * Returns the SmartReflex(tm) state
290 int MainWindow::getSmartReflexState()
292 //SmartReflex is only supprted on Maemo5
293 #if defined(Q_WS_MAEMO_5)
294 QString tmp = readSysFile( "power/sr_vdd1_autocomp" );
302 //disable UI checkbox
303 ui->sr_box->setDisabled( true );
311 * Initializes internal variables, such as:
313 * - scalingFrequencies
317 void MainWindow::init()
320 QString freqs = readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies" );
321 QStringList freqList = freqs.split( " " );
322 //change the order of the QStringList - last element becomes first
323 for (int i=freqList.size() - 1; i>=0; --i) {
324 if (freqList.at(i) != "")
325 this->scalingFrequencies << freqList.at(i);
327 this->scalingSteps = (this->scalingFrequencies.size());
329 //set minFreq and check avoid_frequencies
330 QString min = readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_min_freq" );
331 //check if avoid file exists (only on power kernel)
332 QFile file( "/sys/devices/system/cpu/cpu0/cpufreq/ondemand/avoid_frequencies" );
334 QString avoid = readSysFile( "devices/system/cpu/cpu0/cpufreq/ondemand/avoid_frequencies" );
335 QStringList avoidList = avoid.split( " " );
337 //check if min is in avoid_frequencies
338 for (int i = getScalingStep( min.toInt() ); i <= this->scalingSteps; ++i) {
339 min.setNum( getScalingFreq(i) );
340 if (!avoidList.contains(min)) {
341 this->minFreq = min.toInt();
346 this->minFreq = min.toInt();
349 //check if we are using a power kernel
350 if ( getScalingFreq(getScalingSteps()) > 600000 ) {
351 this->powerKernel = true;
353 this->powerKernel = false;
359 * Reads any file in /sys/
361 * \param sys_file : full path to sys file - omit "/sys/"
362 * \return content of sys file
364 QString MainWindow::readSysFile(QString sys_file)
366 QFile file( "/sys/"+sys_file );
369 if ( !file.exists() || !file.open( QIODevice::ReadOnly ) ) {
370 QMessageBox::critical(this, tr("QCPUFreq"), tr("Could not get information from /sys!"));
375 QTextStream in( &file );
376 QString txt = in.readLine();
386 * Refreshes all of the values to display
388 void MainWindow::refresh()
390 //get the current frequency and calculate the MHz value
391 int freq = ( getMinFreq() / 1000 );
393 display.setNum( freq );
394 display.append( " MHz" );
395 ui->freq_min->setText( display );
397 //do the same thing for the maximum frequency
398 freq = ( getMaxFreq() / 1000 );
399 display.setNum( freq );
400 display.append( " MHz" );
401 ui->freq_max->setText( display );
403 //display the current governor
404 ui->freq_governor->setText( getScalingGovernor() );
406 //display current temperature
407 ui->cpu_temp->setText( getCPUTemp() );
409 //smart reflex button
410 if ( getSmartReflexState() == 1 )
411 ui->sr_box->setCheckState( Qt::Checked );
413 ui->sr_box->setCheckState( Qt::Unchecked );
416 //display frequency slider
417 ui->freq_adjust->setMinimum( 1 );
418 ui->freq_adjust->setMaximum( getScalingSteps() );
419 ui->freq_adjust->setSliderPosition( getScalingStep(getMaxFreq()) );
421 //ui->retranslateUi(this);
426 * Repaints part of the GUI after the device was rotated
428 void MainWindow::orientationChanged()
432 //check whether we are using portrait or landscape mode
433 if ( usePortrait() ) {
434 //in portrait mode we want to display the large image
435 image.load( ":/img/chip256" );
437 scene.addPixmap( image );
439 ui->graphicsPortrait->setScene( &scene );
440 ui->graphicsPortrait->setMaximumSize( 256, 256 );
441 ui->graphicsLandscape->setMaximumSize( 0, 0 );
443 image.load( ":/img/chip128" );
445 scene.addPixmap( image );
447 ui->graphicsLandscape->setScene( &scene );
448 ui->graphicsLandscape->setMaximumSize( 128, 128 );
449 ui->graphicsPortrait->setMaximumSize( 0, 0 );
455 * Enables the auto-rotation feature of Maemo5 devices
457 void MainWindow::setAutoRotation()
459 #if defined(Q_WS_MAEMO_5)
460 setAttribute(Qt::WA_Maemo5AutoOrientation, true);
466 * SLOT: enable/disable overclocking.
468 void MainWindow::setOverclocking()
470 if (ui->actionOverclocking->isChecked()) {
471 #if defined(Q_WS_MAEMO_5)
472 QMaemo5InformationBox::information(this, tr( "Please note that overclocking voids your warranty and may break your device! Be careful!"), 0);
474 this->allowOverclocking = true;
476 this->allowOverclocking = false;
482 * SLOT: Enables or disables Smart Reflex(tm) after pressing sr_btn
484 void MainWindow::setSmartReflex()
486 //SmartReflex is only supported on Maemo5
487 #if defined(Q_WS_MAEMO_5)
488 if ( getSmartReflexState() == 1 )
489 callHelper( "set_sr", "off");
491 QMaemo5InformationBox::information(this, tr( "SmartReflex support is known to be unstable on some devices and may cause random reboots." ), 0);
492 callHelper( "set_sr", "on");
502 * SLOT: display the help window
504 void MainWindow::showHelp()
511 * SLOT: displays the settings widget
513 void MainWindow::showSettings()
521 * Returns true when the device is in portrait mode
523 bool MainWindow::usePortrait()
525 QRect screenGeometry = QApplication::desktop()->screenGeometry();
526 if (screenGeometry.width() > screenGeometry.height())