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"
33 MainWindow::MainWindow(QWidget *parent) :
35 //create helper process
36 helperProcess( this ),
37 //create a new, stackable help window
39 //create UI refresh timer
41 //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);
56 // setup auto rotation
59 //initialize orientation
62 //refresh UI every 10 seconds
63 refreshTimer.start( 10000 );
65 // initialize stackable help window
66 #if defined(Q_WS_MAEMO_5)
67 helpWindow.setAttribute(Qt::WA_Maemo5StackedWindow);
69 helpWindow.setWindowFlags( windowFlags() | Qt::Window );
74 //show errors about the sudo setup only once
77 //connect signals and slots
78 connect(ui->actionHelp, SIGNAL(triggered()), this, SLOT(showHelp()));
79 connect( ui->actionAbout, SIGNAL(triggered()), this, SLOT(about()) );
80 connect( ui->freq_adjust, SIGNAL(valueChanged(int)), this, SLOT(adjustFreq()) );
81 connect(QApplication::desktop(), SIGNAL(resized(int)), this, SLOT(orientationChanged()));
82 connect(ui->sr_box, SIGNAL(clicked()), this, SLOT(setSmartReflex()));
83 connect(&refreshTimer, SIGNAL(timeout()), this, SLOT(refresh()));
84 connect(ui->actionSettings, SIGNAL(triggered()), this, SLOT(showSettings()));
88 MainWindow::~MainWindow()
95 * SLOT: Displays an about box
97 void MainWindow::about()
99 QMessageBox::about(this, APPNAME " " APPVERSION, "<p style=\"align:center;\">© 2010 Daniel Klaffenbach</p>" );
105 * SLOT: Adjusts the maximum CPU frequency according to the scaler
107 void MainWindow::adjustFreq()
109 int newmax = getScalingFreq( ui->freq_adjust->sliderPosition() );
111 if (newmax == getMaxFreq() ) {
112 //we do not need to change anything in this case
118 //maxfreq should not be smaller than minfreq, because we do not want to decrease minfreq
119 if (newmax < getMinFreq())
120 newmax = getMinFreq();
122 max.setNum( newmax );
124 //check for overclocking
125 #if defined(Q_WS_MAEMO_5)
126 if (!settings.useOverclocking() && newmax > 600000) {
127 QMaemo5InformationBox::information(this, tr( "You need to enable overclocking in QCPUFreq's settings in order to set frequencies above 600MHz!"), 0);
133 callHelper( "set_maxfreq", max );
140 * Calls the QCPUFreq helper script with "sudo action param"
142 * @param action : the action of the helper script
143 * @param param : the parameter for the action
146 int MainWindow::callHelper(QString action, QString param)
148 QStringList arguments;
150 #if defined(Q_WS_MAEMO_5)
151 //On Maemo 5 the helper script resides in /opt/usr/bin, which is usually not in $PATH
152 arguments.append( "/opt/usr/bin/QCPUFreq.helper" );
154 arguments.append( "QCPUFreq.helper" );
157 arguments.append( action );
158 arguments.append( param );
160 helperProcess.start( "sudo", arguments, QIODevice::NotOpen );
162 if ( showSudoError && !helperProcess.waitForFinished( 400 )) {
163 //do not show this error again
164 showSudoError = false;
165 QMessageBox::critical(this, tr("QCPUFreq"), tr("There seems to be a problem with your sudo setup!"));
168 return helperProcess.exitCode();
173 * Returns the current CPU temperature
175 QString MainWindow::getCPUTemp()
177 #if defined(Q_WS_MAEMO_5)
178 QFile file( "/sys/class/power_supply/bq27200-0/temp" );
180 //check if we can read a more accurate temperature (only for power kernel)
182 return QString( readSysFile( "class/power_supply/bq27200-0/temp" ) + " " + QString::fromUtf8("\302\260") + "C" );
185 We actually only need to read the raw temperature, but it appears that by also reading temp1_input
186 the raw temperature (temp1_input_raw) is being updated more frequently.
188 readSysFile( "devices/platform/omap34xx_temp/temp1_input" );
190 //read the current system temperature
191 QString tstring = readSysFile( "devices/platform/omap34xx_temp/temp1_input_raw" );
193 return tr( "Unknown" );
195 //convert it to an integer and calculate the approx. temperature from the raw value
196 int tint = tstring.toInt();
197 tint = ( 0.65 * tint );
198 tstring.setNum(tint);
199 return QString( tstring + " " + QString::fromUtf8("\302\260") + "C" );
202 return tr( "Unknown" );
207 * Returns the maximum CPU frequency
209 int MainWindow::getMaxFreq()
211 QString tmp = readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_max_freq" );
217 * Returns the minimum CPU frequency
219 int MainWindow::getMinFreq()
221 return this->minFreq;
226 * Returns the CPU frequency for the specified scaling step
228 int MainWindow::getScalingFreq(int step)
233 if ( step > getScalingSteps() - 1 )
234 step = getScalingSteps() - 1;
236 return this->scalingFrequencies[ step ].toInt();
241 * Returns the name of the current CPU frequency scaling governor
243 * @return QString - name of governor
245 QString MainWindow::getScalingGovernor()
247 return readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_governor" );
252 * Returns the amount of available scaling steps.
256 int MainWindow::getScalingSteps()
258 return this->scalingSteps;
263 * Returns the scaling step for the specified frequency.
267 int MainWindow::getScalingStep( int freq )
271 return this->scalingFrequencies.indexOf(tmp) + 1;
276 * Returns the SmartReflex(tm) state
280 int MainWindow::getSmartReflexState()
282 //SmartReflex is only supprted on Maemo5
283 #if defined(Q_WS_MAEMO_5)
284 QString tmp = readSysFile( "power/sr_vdd1_autocomp" );
292 //disable UI checkbox
293 ui->sr_box->setDisabled( true );
301 * Initializes internal variables, such as:
303 * - scalingFrequencies
306 void MainWindow::init()
309 QString freqs = readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies" );
310 QStringList freqList = freqs.split( " " );
311 //change the order of the QStringList - last element becomes first
312 for (int i=freqList.size() - 1; i>=0; --i) {
313 if (freqList.at(i) != "")
314 this->scalingFrequencies << freqList.at(i);
316 this->scalingSteps = (this->scalingFrequencies.size());
318 //set minFreq and check avoid_frequencies
319 QString min = readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_min_freq" );
320 //check if avoid file exists (only on power kernel)
321 QFile file( "/sys/devices/system/cpu/cpu0/cpufreq/ondemand/avoid_frequencies" );
323 QString avoid = readSysFile( "devices/system/cpu/cpu0/cpufreq/ondemand/avoid_frequencies" );
324 QStringList avoidList = avoid.split( " " );
326 //check if min is in avoid_frequencies
327 for (int i = getScalingStep( min.toInt() ); i <= this->scalingSteps; ++i) {
328 min.setNum( getScalingFreq(i) );
329 if (!avoidList.contains(min)) {
330 this->minFreq = min.toInt();
335 this->minFreq = min.toInt();
341 * Reads any file in /sys/
343 * \param sys_file : full path to sys file - omit "/sys/"
344 * \return content of sys file
346 QString MainWindow::readSysFile(QString sys_file)
348 QFile file( "/sys/"+sys_file );
351 if ( !file.exists() || !file.open( QIODevice::ReadOnly ) ) {
352 QMessageBox::critical(this, tr("QCPUFreq"), tr("Could not get information from /sys!"));
357 QTextStream in( &file );
358 QString txt = in.readLine();
368 * Refreshes all of the values to display
370 void MainWindow::refresh()
372 //get the current frequency and calculate the MHz value
373 int freq = ( getMinFreq() / 1000 );
375 display.setNum( freq );
376 display.append( " MHz" );
377 ui->freq_min->setText( display );
379 //do the same thing for the maximum frequency
380 freq = ( getMaxFreq() / 1000 );
381 display.setNum( freq );
382 display.append( " MHz" );
383 ui->freq_max->setText( display );
385 //display the current governor
386 ui->freq_governor->setText( getScalingGovernor() );
388 //display current temperature
389 ui->cpu_temp->setText( getCPUTemp() );
391 //smart reflex button
392 if ( getSmartReflexState() == 1 )
393 ui->sr_box->setCheckState( Qt::Checked );
395 ui->sr_box->setCheckState( Qt::Unchecked );
398 //display frequency slider
399 ui->freq_adjust->setMinimum( 1 );
400 ui->freq_adjust->setMaximum( getScalingSteps() );
401 ui->freq_adjust->setSliderPosition( getScalingStep(getMaxFreq()) );
406 * Repaints part of the GUI after the device was rotated
408 void MainWindow::orientationChanged()
412 //check whether we are using portrait or landscape mode
413 if ( usePortrait() ) {
414 //in portrait mode we want to display the large image
415 image.load( ":/img/chip256" );
417 scene.addPixmap( image );
419 ui->graphicsPortrait->setScene( &scene );
420 ui->graphicsPortrait->setMaximumSize( 256, 256 );
421 ui->graphicsLandscape->setMaximumSize( 0, 0 );
423 image.load( ":/img/chip128" );
425 scene.addPixmap( image );
427 ui->graphicsLandscape->setScene( &scene );
428 ui->graphicsLandscape->setMaximumSize( 128, 128 );
429 ui->graphicsPortrait->setMaximumSize( 0, 0 );
435 * Enables or disables the auto-rotation feature of Maemo5 devices.
437 void MainWindow::setAutoRotation()
439 #if defined(Q_WS_MAEMO_5)
440 setAttribute(Qt::WA_Maemo5AutoOrientation, settings.useAutoRotate());
446 * SLOT: Enables or disables Smart Reflex(tm) after pressing sr_btn
448 void MainWindow::setSmartReflex()
450 //SmartReflex is only supported on Maemo5
451 #if defined(Q_WS_MAEMO_5)
452 if ( getSmartReflexState() == 1 )
453 callHelper( "set_sr", "off");
455 QMaemo5InformationBox::information(this, tr( "SmartReflex support is known to be unstable on some devices and may cause random reboots." ), 0);
456 callHelper( "set_sr", "on");
466 * SLOT: display the help window
468 void MainWindow::showHelp()
475 * SLOT: displays the settings widget
477 void MainWindow::showSettings()
485 * Returns true when the device is in portrait mode
487 bool MainWindow::usePortrait()
489 QRect screenGeometry = QApplication::desktop()->screenGeometry();
490 if (screenGeometry.width() > screenGeometry.height())