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>
31 #define APPNAME "QCPUFreq"
32 #define APPVERSION "0.3.2"
34 MainWindow::MainWindow(QWidget *parent) :
36 ui(new Ui::MainWindow)
38 //this is a stacked window on Maemo 5
39 #if defined(Q_WS_MAEMO_5)
40 setAttribute(Qt::WA_Maemo5StackedWindow);
47 // enable auto rotation
50 //create a QGraphicsScene for the little chip icon
51 scene = new QGraphicsScene();
54 //create the refresh timer
55 refreshTimer = new QTimer();
56 //refresh UI every 10 seconds
57 refreshTimer->start( 10000 );
59 //create helper process
60 helperProcess = new QProcess;
62 //create a new, stackable help window
63 helpWindow = new HelpWindow( this );
64 #if defined(Q_WS_MAEMO_5)
65 helpWindow->setAttribute(Qt::WA_Maemo5StackedWindow);
67 helpWindow->setWindowFlags( windowFlags() | Qt::Window );
69 //show errors about the sudo setup only once
72 //connect signals and slots
73 connect(ui->actionHelp, SIGNAL(triggered()), this, SLOT(showHelp()));
74 connect( ui->actionAbout, SIGNAL(triggered()), this, SLOT(about()) );
75 connect( ui->freq_adjust, SIGNAL(valueChanged(int)), this, SLOT(adjustFreq()) );
76 connect(QApplication::desktop(), SIGNAL(resized(int)), this, SLOT(orientationChanged()));
77 connect(ui->sr_box, SIGNAL(clicked()), this, SLOT(setSmartReflex()));
78 connect(refreshTimer, SIGNAL(timeout()), this, SLOT(refresh()));
82 MainWindow::~MainWindow()
92 * SLOT: Displays an about box
94 void MainWindow::about()
96 QMessageBox::about(this, APPNAME " " APPVERSION, "<p style=\"align:center;\">© 2010 Daniel Klaffenbach</p>" );
102 * SLOT: Adjusts the maximum CPU frequency according to the scaler
104 void MainWindow::adjustFreq()
106 int newmax = getScalingFreq( ui->freq_adjust->sliderPosition() );
109 //maxfreq should not be smaller than minfreq, because we do not want to decrease minfreq
110 if (newmax < getMinFreq())
111 newmax = getMinFreq();
113 max.setNum( newmax );
115 callHelper( "set_maxfreq", max );
122 * Calls the QCPUFreq helper script with "sudo action param"
124 * @param action : the action of the helper script
125 * @param param : the parameter for the action
128 int MainWindow::callHelper(QString action, QString param)
130 QStringList arguments;
132 #if defined(Q_WS_MAEMO_5)
133 //On Maemo 5 the helper script resides in /opt/usr/bin, which is usually not in $PATH
134 arguments.append( "/opt/usr/bin/QCPUFreq.helper" );
136 arguments.append( "QCPUFreq.helper" );
139 arguments.append( action );
140 arguments.append( param );
142 helperProcess->start( "sudo", arguments, QIODevice::NotOpen );
144 if ( showSudoError && !helperProcess->waitForFinished( 400 )) {
145 //do not show this error again
146 showSudoError = false;
147 QMessageBox::critical(this, tr("QCPUFreq"), tr("There seems to be a problem with your sudo setup!"));
150 return helperProcess->exitCode();
155 * Returns the current CPU temperature
157 QString MainWindow::getCPUTemp()
159 #if defined(Q_WS_MAEMO_5)
160 QFile file( "/sys/class/power_supply/bq27200-0/temp" );
162 //check if we can read a more accurate temperature (only for power kernel)
164 return QString( readSysFile( "class/power_supply/bq27200-0/temp" ) + " " + QString::fromUtf8("\302\260") + "C" );
167 We actually only need to read the raw temperature, but it appears that by also reading temp1_input
168 the raw temperature (temp1_input_raw) is being updated more frequently.
170 readSysFile( "devices/platform/omap34xx_temp/temp1_input" );
172 //read the current system temperature
173 QString tstring = readSysFile( "devices/platform/omap34xx_temp/temp1_input_raw" );
175 return tr( "Unknown" );
177 //convert it to an integer and calculate the approx. temperature from the raw value
178 int tint = tstring.toInt();
179 tint = ( 0.65 * tint );
180 tstring.setNum(tint);
181 return QString( tstring + " " + QString::fromUtf8("\302\260") + "C" );
184 return tr( "Unknown" );
189 * Returns the maximum CPU frequency
191 int MainWindow::getMaxFreq()
193 QString tmp = readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_max_freq" );
199 * Returns the minimum CPU frequency
201 int MainWindow::getMinFreq()
203 QString tmp = readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_min_freq" );
209 * Returns the CPU frequency for the specified scaling step
211 int MainWindow::getScalingFreq(int step)
213 QString tmp = readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies" );
214 QStringList freqs = tmp.split( " " );
218 if ( step > getScalingSteps() )
219 step = getScalingSteps();
227 * Returns the name of the current CPU frequency scaling governor
229 * \return name of governor
231 QString MainWindow::getScalingGovernor()
233 return readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_governor" );
238 * Returns the amount of available scaling steps.
240 int MainWindow::getScalingSteps()
242 QString tmp = readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies" );
243 QStringList freqs = tmp.split( " " );
244 return (freqs.size() - 1);
249 * Returns the scaling step for the specified frequency.
251 int MainWindow::getScalingStep( int freq )
253 for( int i = 1; i <= getScalingSteps(); ++i ) {
254 if ( getScalingFreq(i) == freq )
263 * Returns the SmartReflex(tm) state
267 int MainWindow::getSmartReflexState()
269 //SmartReflex is only supprted on Maemo5
270 #if defined(Q_WS_MAEMO_5)
271 QString tmp = readSysFile( "power/sr_vdd1_autocomp" );
278 //disable UI checkbox
279 ui->sr_box->setDisabled( true );
287 * Reads any file in /sys/
289 * \param sys_file : full path to sys file - omit "/sys/"
290 * \return content of sys file
292 QString MainWindow::readSysFile(QString sys_file)
294 QFile file( "/sys/"+sys_file );
297 if ( !file.exists() || !file.open( QIODevice::ReadOnly ) ) {
298 QMessageBox::critical(this, tr("QCPUFreq"), tr("Could not get information from /sys!"));
303 QTextStream in( &file );
304 QString txt = in.readLine();
314 * Refreshes all of the values to display
316 void MainWindow::refresh()
318 //get the current frequency and calculate the MHz value
319 int freq = ( getMinFreq() / 1000 );
321 display.setNum( freq );
322 display.append( " MHz" );
323 ui->freq_min->setText( display );
325 //do the same thing for the maximum frequency
326 freq = ( getMaxFreq() / 1000 );
327 display.setNum( freq );
328 display.append( " MHz" );
329 ui->freq_max->setText( display );
331 //display the current governor
332 ui->freq_governor->setText( getScalingGovernor() );
334 //display current temperature
335 ui->cpu_temp->setText( getCPUTemp() );
337 //smart reflex button
338 if ( getSmartReflexState() == 1 )
339 ui->sr_box->setCheckState( Qt::Checked );
341 ui->sr_box->setCheckState( Qt::Unchecked );
344 //display frequency slider
345 ui->freq_adjust->setMinimum( 1 );
346 ui->freq_adjust->setMaximum( getScalingSteps() );
347 ui->freq_adjust->setInvertedAppearance( true );
348 ui->freq_adjust->setSliderPosition( getScalingStep(getMaxFreq()) );
350 //ui->retranslateUi(this);
355 * Repaints part of the GUI after the device was rotated
357 void MainWindow::orientationChanged()
361 //check whether we are using portrait or landscape mode
362 if ( usePortrait() ) {
363 //in portrait mode we want to display the large image
364 image.load( ":/img/chip256" );
365 this->scene->clear();
366 this->scene->addPixmap( image );
368 ui->graphicsPortrait->setScene( this->scene );
369 ui->graphicsPortrait->setMaximumSize( 256, 256 );
370 ui->graphicsLandscape->setMaximumSize( 0, 0 );
372 image.load( ":/img/chip128" );
373 this->scene->clear();
374 this->scene->addPixmap( image );
376 ui->graphicsLandscape->setScene( this->scene );
377 ui->graphicsLandscape->setMaximumSize( 128, 128 );
378 ui->graphicsPortrait->setMaximumSize( 0, 0 );
384 * Enables the auto-rotation feature of Maemo5 devices
386 void MainWindow::setAutoRotation()
388 #if defined(Q_WS_MAEMO_5)
389 setAttribute(Qt::WA_Maemo5AutoOrientation, true);
395 * SLOT: Enables or disables Smart Reflex(tm) after pressing sr_btn
397 void MainWindow::setSmartReflex()
399 //SmartReflex is only supported on Maemo5
400 #if defined(Q_WS_MAEMO_5)
401 if ( getSmartReflexState() == 1 )
402 callHelper( "set_sr", "off");
404 QMaemo5InformationBox::information(this, tr( "SmartReflex support is known to be unstable on some devices and may cause random reboots." ), QMaemo5InformationBox::DefaultTimeout);
405 callHelper( "set_sr", "on");
415 * SLOT: display the help window
417 void MainWindow::showHelp()
424 * Returns true when the device is in portrait mode
426 bool MainWindow::usePortrait()
428 QRect screenGeometry = QApplication::desktop()->screenGeometry();
429 if (screenGeometry.width() > screenGeometry.height())