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 "0.4.1"
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;
59 //applies the settings from the settings dialog
62 //initialize orientation
65 //refresh UI every 10 seconds
66 refreshTimer.start( 10000 );
68 // initialize stackable help window
69 #if defined(Q_WS_MAEMO_5)
70 helpWindow.setAttribute(Qt::WA_Maemo5StackedWindow);
72 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->actionSave, SIGNAL(triggered()), this, SLOT(save()));
85 connect(ui->actionLoad, SIGNAL(triggered()), this, SLOT(loadPreset()));
86 connect(ui->actionSettings, SIGNAL(triggered()), this, SLOT(showSettings()));
87 connect(settings, SIGNAL(settingsChanged()), this, SLOT(applySettings()));
91 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 (!settings->useOverclocking() && newmax > 600000) {
131 QMaemo5InformationBox::information(this, tr( "You need to enable overclocking in QCPUFreq's settings in order to set frequencies above 600MHz!"), 0);
137 //check for 599MHz <-> 600MHz problem on power kernels
138 if (max == "600000" && settings->usePowerKernel()) {
139 //we really need to set the maximum to 599MHz
143 callHelper( "set_maxfreq", max );
150 * SLOT: applies the settings from the Settings dialog.
152 void MainWindow::applySettings()
155 setAdvancedTemperature();
157 //refresh the GUI after applying the settings
163 * Calls the QCPUFreq helper script with "sudo action param"
165 * @param action : the action of the helper script
166 * @param param : the parameter for the action
169 int MainWindow::callHelper(QString action, QString param)
171 QStringList arguments;
173 #if defined(Q_WS_MAEMO_5)
174 //On Maemo 5 the helper script resides in /opt/usr/bin, which is usually not in $PATH
175 arguments.append( "/opt/usr/bin/QCPUFreq.helper" );
177 arguments.append( "QCPUFreq.helper" );
180 arguments.append( action );
181 arguments.append( param );
183 helperProcess.start( "sudo", arguments, QIODevice::NotOpen );
185 if ( showSudoError && !helperProcess.waitForFinished( 2000 )) {
186 //do not show this error again
187 showSudoError = false;
188 QMessageBox::critical(this, tr("QCPUFreq"), tr("There seems to be a problem with your sudo setup!"));
191 return helperProcess.exitCode();
196 * Returns the current CPU temperature
198 QString MainWindow::getCPUTemp()
200 #if defined(Q_WS_MAEMO_5)
201 QFile file( "/sys/class/power_supply/bq27200-0/temp" );
203 //check if we can read a more accurate temperature (only for power kernel)
205 return QString( readSysFile( "class/power_supply/bq27200-0/temp" ) + " " + QString::fromUtf8("\302\260") + "C" );
208 We actually only need to read the raw temperature, but it appears that by also reading temp1_input
209 the raw temperature (temp1_input_raw) is being updated more frequently.
211 readSysFile( "devices/platform/omap34xx_temp/temp1_input" );
213 //read the current system temperature
214 QString tstring = readSysFile( "devices/platform/omap34xx_temp/temp1_input_raw" );
216 return tr( "Unknown" );
218 //convert it to an integer and calculate the approx. temperature from the raw value
219 int tint = tstring.toInt();
220 tint = ( 0.65 * tint );
221 tstring.setNum(tint);
222 return QString( tstring + " " + QString::fromUtf8("\302\260") + "C" );
225 return tr( "Unknown" );
230 * Returns the maximum CPU frequency
232 int MainWindow::getMaxFreq()
234 QString tmp = readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_max_freq" );
240 * Returns the minimum CPU frequency
242 int MainWindow::getMinFreq()
244 return this->minFreq;
249 * Returns the CPU frequency for the specified scaling step
251 int MainWindow::getScalingFreq(int step)
256 if ( step > getScalingSteps() - 1 )
257 step = getScalingSteps() - 1;
259 return this->scalingFrequencies[ step ].toInt();
264 * Returns the name of the current CPU frequency scaling governor
266 * @return QString - name of governor
268 QString MainWindow::getScalingGovernor()
270 return readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_governor" );
275 * Returns the amount of available scaling steps.
279 int MainWindow::getScalingSteps()
281 return this->scalingSteps;
286 * Returns the scaling step for the specified frequency.
290 int MainWindow::getScalingStep( int freq )
294 return this->scalingFrequencies.indexOf(tmp) + 1;
299 * Returns the SmartReflex(tm) state
303 int MainWindow::getSmartReflexState()
305 //SmartReflex is only supprted on Maemo5
306 #if defined(Q_WS_MAEMO_5)
307 QString tmp = readSysFile( "power/sr_vdd1_autocomp" );
315 //disable UI checkbox
316 ui->sr_box->setDisabled( true );
324 * Initializes internal variables, such as:
326 * - scalingFrequencies
329 void MainWindow::init()
332 QString freqs = readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies" );
333 QStringList freqList = freqs.split( " " );
334 //change the order of the QStringList - last element becomes first
335 for (int i=freqList.size() - 1; i>=0; --i) {
336 if (freqList.at(i) != "")
337 this->scalingFrequencies << freqList.at(i);
339 this->scalingSteps = (this->scalingFrequencies.size());
341 //set minFreq and check avoid_frequencies
342 QString min = readSysFile( "devices/system/cpu/cpu0/cpufreq/scaling_min_freq" );
343 //check if avoid file exists (only on power kernel)
344 QFile file( "/sys/devices/system/cpu/cpu0/cpufreq/ondemand/avoid_frequencies" );
346 QString avoid = readSysFile( "devices/system/cpu/cpu0/cpufreq/ondemand/avoid_frequencies" );
347 QStringList avoidList = avoid.split( " " );
349 //check if min is in avoid_frequencies
350 for (int i = getScalingStep( min.toInt() ); i <= this->scalingSteps; ++i) {
351 min.setNum( getScalingFreq(i) );
352 if (!avoidList.contains(min)) {
353 this->minFreq = min.toInt();
358 this->minFreq = min.toInt();
361 //enable save and load option on power kernels
362 if (settings->usePowerKernel()) {
363 //only enable save if /usr/sbin/kernel-config is present
365 file.setFileName("/usr/sbin/kernel-config");
367 ui->actionSave->setEnabled(true);
368 ui->actionLoad->setEnabled(true);
375 * Loads a voltage preset by calling kernel-config.
377 * Available presets are:
384 * - custom -> any preset named "custom"
386 void MainWindow::loadPreset()
393 * Reads any file in /sys/
395 * \param sys_file : full path to sys file - omit "/sys/"
396 * \return content of sys file
398 QString MainWindow::readSysFile(QString sys_file)
400 QFile file( "/sys/"+sys_file );
403 if ( !file.exists() || !file.open( QIODevice::ReadOnly ) ) {
404 QMessageBox::critical(this, tr("QCPUFreq"), tr("Could not get information from /sys!"));
409 QTextStream in( &file );
410 QString txt = in.readLine();
420 * Refreshes all of the values to display
422 void MainWindow::refresh()
424 //get the current frequency and calculate the MHz value
425 int freq = ( getMinFreq() / 1000 );
427 display.setNum( freq );
428 display.append( " MHz" );
429 ui->freq_min->setText( display );
431 //do the same thing for the maximum frequency
432 freq = ( getMaxFreq() / 1000 );
433 display.setNum( freq );
434 display.append( " MHz" );
435 ui->freq_max->setText( display );
437 //display the current governor
438 ui->freq_governor->setText( getScalingGovernor() );
440 //display current temperature
441 ui->cpu_temp->setText( getCPUTemp() );
443 //smart reflex button
444 if ( getSmartReflexState() == 1 )
445 ui->sr_box->setCheckState( Qt::Checked );
447 ui->sr_box->setCheckState( Qt::Unchecked );
450 //display frequency slider
451 ui->freq_adjust->setMinimum( 1 );
452 ui->freq_adjust->setMaximum( getScalingSteps() );
453 ui->freq_adjust->setSliderPosition( getScalingStep(getMaxFreq()) );
458 * Repaints part of the GUI after the device was rotated
460 void MainWindow::orientationChanged()
464 //check whether we are using portrait or landscape mode
465 if ( usePortrait() ) {
466 //in portrait mode we want to display the large image
467 image.load( ":/img/chip256" );
469 scene.addPixmap( image );
471 ui->graphicsPortrait->setScene( &scene );
472 ui->graphicsPortrait->setMaximumSize( 256, 256 );
473 ui->graphicsLandscape->setMaximumSize( 0, 0 );
475 image.load( ":/img/chip128" );
477 scene.addPixmap( image );
479 ui->graphicsLandscape->setScene( &scene );
480 ui->graphicsLandscape->setMaximumSize( 128, 128 );
481 ui->graphicsPortrait->setMaximumSize( 0, 0 );
487 * Saves the current maximim frequency as default (only on power kernel).
489 void MainWindow::save()
491 if (settings->usePowerKernel()) {
492 callHelper( "save", "null" );
493 #if defined(Q_WS_MAEMO_5)
494 QMaemo5InformationBox::information(this, tr( "The current frequency settings have been saved as default." ), QMaemo5InformationBox::DefaultTimeout);
501 * Checks the settings if the "bq27x00_battery" needs to be loaded.
503 void MainWindow::setAdvancedTemperature()
505 if (settings->usePowerKernel() && settings->useAdvancedTemperature()) {
506 callHelper( "load_bq27", "null" );
512 * Enables or disables the auto-rotation feature of Maemo5 devices.
514 void MainWindow::setAutoRotation()
516 #if defined(Q_WS_MAEMO_5)
517 setAttribute(Qt::WA_Maemo5AutoOrientation, settings->useAutoRotate());
518 settings->setAttribute(Qt::WA_Maemo5AutoOrientation, settings->useAutoRotate());
524 * SLOT: Enables or disables Smart Reflex(tm) after pressing sr_btn
526 void MainWindow::setSmartReflex()
528 //SmartReflex is only supported on Maemo5
529 #if defined(Q_WS_MAEMO_5)
530 if ( getSmartReflexState() == 1 )
531 callHelper( "set_sr", "off");
533 QMaemo5InformationBox::information(this, tr( "SmartReflex support is known to be unstable on some devices and may cause random reboots." ), 0);
534 callHelper( "set_sr", "on");
544 * SLOT: display the help window
546 void MainWindow::showHelp()
553 * SLOT: displays the settings widget
555 void MainWindow::showSettings()
563 * Returns true when the device is in portrait mode
565 bool MainWindow::usePortrait()
567 QRect screenGeometry = QApplication::desktop()->screenGeometry();
568 if (screenGeometry.width() > screenGeometry.height())