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;
57 //applies the settings from the settings dialog
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(applySettings()));
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 * SLOT: applies the settings from the Settings dialog.
145 void MainWindow::applySettings()
148 setAdvancedTemperature();
153 * Calls the QCPUFreq helper script with "sudo action param"
155 * @param action : the action of the helper script
156 * @param param : the parameter for the action
159 int MainWindow::callHelper(QString action, QString param)
161 QStringList arguments;
163 #if defined(Q_WS_MAEMO_5)
164 //On Maemo 5 the helper script resides in /opt/usr/bin, which is usually not in $PATH
165 arguments.append( "/opt/usr/bin/QCPUFreq.helper" );
167 arguments.append( "QCPUFreq.helper" );
170 arguments.append( action );
171 arguments.append( param );
173 helperProcess.start( "sudo", arguments, QIODevice::NotOpen );
175 if ( showSudoError && !helperProcess.waitForFinished( 400 )) {
176 //do not show this error again
177 showSudoError = false;
178 QMessageBox::critical(this, tr("QCPUFreq"), tr("There seems to be a problem with your sudo setup!"));
181 return helperProcess.exitCode();
186 * Returns the current CPU temperature
188 QString MainWindow::getCPUTemp()
190 #if defined(Q_WS_MAEMO_5)
191 QFile file( "/sys/class/power_supply/bq27200-0/temp" );
193 //check if we can read a more accurate temperature (only for power kernel)
195 return QString( readSysFile( "class/power_supply/bq27200-0/temp" ) + " " + QString::fromUtf8("\302\260") + "C" );
198 We actually only need to read the raw temperature, but it appears that by also reading temp1_input
199 the raw temperature (temp1_input_raw) is being updated more frequently.
201 readSysFile( "devices/platform/omap34xx_temp/temp1_input" );
203 //read the current system temperature
204 QString tstring = readSysFile( "devices/platform/omap34xx_temp/temp1_input_raw" );
206 return tr( "Unknown" );
208 //convert it to an integer and calculate the approx. temperature from the raw value
209 int tint = tstring.toInt();
210 tint = ( 0.65 * tint );
211 tstring.setNum(tint);
212 return QString( tstring + " " + QString::fromUtf8("\302\260") + "C" );
215 return tr( "Unknown" );
220 * Returns the maximum CPU frequency
222 int MainWindow::getMaxFreq()
224 QString tmp = readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_max_freq" );
230 * Returns the minimum CPU frequency
232 int MainWindow::getMinFreq()
234 return this->minFreq;
239 * Returns the CPU frequency for the specified scaling step
241 int MainWindow::getScalingFreq(int step)
246 if ( step > getScalingSteps() - 1 )
247 step = getScalingSteps() - 1;
249 return this->scalingFrequencies[ step ].toInt();
254 * Returns the name of the current CPU frequency scaling governor
256 * @return QString - name of governor
258 QString MainWindow::getScalingGovernor()
260 return readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_governor" );
265 * Returns the amount of available scaling steps.
269 int MainWindow::getScalingSteps()
271 return this->scalingSteps;
276 * Returns the scaling step for the specified frequency.
280 int MainWindow::getScalingStep( int freq )
284 return this->scalingFrequencies.indexOf(tmp) + 1;
289 * Returns the SmartReflex(tm) state
293 int MainWindow::getSmartReflexState()
295 //SmartReflex is only supprted on Maemo5
296 #if defined(Q_WS_MAEMO_5)
297 QString tmp = readSysFile( "power/sr_vdd1_autocomp" );
305 //disable UI checkbox
306 ui->sr_box->setDisabled( true );
314 * Initializes internal variables, such as:
316 * - scalingFrequencies
319 void MainWindow::init()
322 QString freqs = readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies" );
323 QStringList freqList = freqs.split( " " );
324 //change the order of the QStringList - last element becomes first
325 for (int i=freqList.size() - 1; i>=0; --i) {
326 if (freqList.at(i) != "")
327 this->scalingFrequencies << freqList.at(i);
329 this->scalingSteps = (this->scalingFrequencies.size());
331 //set minFreq and check avoid_frequencies
332 QString min = readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_min_freq" );
333 //check if avoid file exists (only on power kernel)
334 QFile file( "/sys/devices/system/cpu/cpu0/cpufreq/ondemand/avoid_frequencies" );
336 QString avoid = readSysFile( "devices/system/cpu/cpu0/cpufreq/ondemand/avoid_frequencies" );
337 QStringList avoidList = avoid.split( " " );
339 //check if min is in avoid_frequencies
340 for (int i = getScalingStep( min.toInt() ); i <= this->scalingSteps; ++i) {
341 min.setNum( getScalingFreq(i) );
342 if (!avoidList.contains(min)) {
343 this->minFreq = min.toInt();
348 this->minFreq = min.toInt();
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->setSliderPosition( getScalingStep(getMaxFreq()) );
419 * Repaints part of the GUI after the device was rotated
421 void MainWindow::orientationChanged()
425 //check whether we are using portrait or landscape mode
426 if ( usePortrait() ) {
427 //in portrait mode we want to display the large image
428 image.load( ":/img/chip256" );
430 scene.addPixmap( image );
432 ui->graphicsPortrait->setScene( &scene );
433 ui->graphicsPortrait->setMaximumSize( 256, 256 );
434 ui->graphicsLandscape->setMaximumSize( 0, 0 );
436 image.load( ":/img/chip128" );
438 scene.addPixmap( image );
440 ui->graphicsLandscape->setScene( &scene );
441 ui->graphicsLandscape->setMaximumSize( 128, 128 );
442 ui->graphicsPortrait->setMaximumSize( 0, 0 );
448 * Checks the settings if the "bq27x00_battery" needs to be loaded.
450 void MainWindow::setAdvancedTemperature()
452 if (settings->usePowerKernel() && settings->useAdvancedTemperature()) {
453 callHelper( "load_bq27", "null" );
459 * Enables or disables the auto-rotation feature of Maemo5 devices.
461 void MainWindow::setAutoRotation()
463 #if defined(Q_WS_MAEMO_5)
464 setAttribute(Qt::WA_Maemo5AutoOrientation, settings->useAutoRotate());
470 * SLOT: Enables or disables Smart Reflex(tm) after pressing sr_btn
472 void MainWindow::setSmartReflex()
474 //SmartReflex is only supported on Maemo5
475 #if defined(Q_WS_MAEMO_5)
476 if ( getSmartReflexState() == 1 )
477 callHelper( "set_sr", "off");
479 QMaemo5InformationBox::information(this, tr( "SmartReflex support is known to be unstable on some devices and may cause random reboots." ), 0);
480 callHelper( "set_sr", "on");
490 * SLOT: display the help window
492 void MainWindow::showHelp()
499 * SLOT: displays the settings widget
501 void MainWindow::showSettings()
509 * Returns true when the device is in portrait mode
511 bool MainWindow::usePortrait()
513 QRect screenGeometry = QApplication::desktop()->screenGeometry();
514 if (screenGeometry.width() > screenGeometry.height())