251 lines
8.5 KiB
C++
251 lines
8.5 KiB
C++
/****************************************************************************
|
|
**
|
|
** Copyright (C) 2015 The Qt Company Ltd.
|
|
** Contact: http://www.qt.io/licensing/
|
|
**
|
|
** This file is part of the plugins of the Qt Toolkit.
|
|
**
|
|
** $QT_BEGIN_LICENSE:LGPL21$
|
|
** Commercial License Usage
|
|
** Licensees holding valid commercial Qt licenses may use this file in
|
|
** accordance with the commercial license agreement provided with the
|
|
** Software or, alternatively, in accordance with the terms contained in
|
|
** a written agreement between you and The Qt Company. For licensing terms
|
|
** and conditions see http://www.qt.io/terms-conditions. For further
|
|
** information use the contact form at http://www.qt.io/contact-us.
|
|
**
|
|
** GNU Lesser General Public License Usage
|
|
** Alternatively, this file may be used under the terms of the GNU Lesser
|
|
** General Public License version 2.1 or version 3 as published by the Free
|
|
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
|
|
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
|
|
** following information to ensure the GNU Lesser General Public License
|
|
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
|
|
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
|
|
**
|
|
** As a special exception, The Qt Company gives you certain additional
|
|
** rights. These rights are described in The Qt Company LGPL Exception
|
|
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
|
|
**
|
|
** $QT_END_LICENSE$
|
|
**
|
|
****************************************************************************/
|
|
|
|
#include "qdevicediscovery_udev_p.h"
|
|
|
|
#include <QStringList>
|
|
#include <QCoreApplication>
|
|
#include <QObject>
|
|
#include <QHash>
|
|
#include <QSocketNotifier>
|
|
#include <QLoggingCategory>
|
|
|
|
#include <linux/input.h>
|
|
|
|
QT_BEGIN_NAMESPACE
|
|
|
|
Q_LOGGING_CATEGORY(lcDD, "qt.qpa.input")
|
|
|
|
QDeviceDiscovery *QDeviceDiscovery::create(QDeviceTypes types, QObject *parent)
|
|
{
|
|
qCDebug(lcDD) << "udev device discovery for type" << types;
|
|
|
|
QDeviceDiscovery *helper = 0;
|
|
struct udev *udev;
|
|
|
|
udev = udev_new();
|
|
if (udev) {
|
|
helper = new QDeviceDiscoveryUDev(types, udev, parent);
|
|
} else {
|
|
qWarning("Failed to get udev library context");
|
|
}
|
|
|
|
return helper;
|
|
}
|
|
|
|
QDeviceDiscoveryUDev::QDeviceDiscoveryUDev(QDeviceTypes types, struct udev *udev, QObject *parent) :
|
|
QDeviceDiscovery(types, parent),
|
|
m_udev(udev), m_udevMonitor(0), m_udevMonitorFileDescriptor(-1), m_udevSocketNotifier(0)
|
|
{
|
|
if (!m_udev)
|
|
return;
|
|
|
|
m_udevMonitor = udev_monitor_new_from_netlink(m_udev, "udev");
|
|
if (!m_udevMonitor) {
|
|
qWarning("Unable to create an udev monitor. No devices can be detected.");
|
|
return;
|
|
}
|
|
|
|
udev_monitor_filter_add_match_subsystem_devtype(m_udevMonitor, "input", 0);
|
|
udev_monitor_filter_add_match_subsystem_devtype(m_udevMonitor, "drm", 0);
|
|
udev_monitor_enable_receiving(m_udevMonitor);
|
|
m_udevMonitorFileDescriptor = udev_monitor_get_fd(m_udevMonitor);
|
|
|
|
m_udevSocketNotifier = new QSocketNotifier(m_udevMonitorFileDescriptor, QSocketNotifier::Read, this);
|
|
connect(m_udevSocketNotifier, SIGNAL(activated(int)), this, SLOT(handleUDevNotification()));
|
|
}
|
|
|
|
QDeviceDiscoveryUDev::~QDeviceDiscoveryUDev()
|
|
{
|
|
if (m_udevMonitor)
|
|
udev_monitor_unref(m_udevMonitor);
|
|
|
|
if (m_udev)
|
|
udev_unref(m_udev);
|
|
}
|
|
|
|
QStringList QDeviceDiscoveryUDev::scanConnectedDevices()
|
|
{
|
|
QStringList devices;
|
|
|
|
if (!m_udev)
|
|
return devices;
|
|
|
|
udev_enumerate *ue = udev_enumerate_new(m_udev);
|
|
udev_enumerate_add_match_subsystem(ue, "input");
|
|
udev_enumerate_add_match_subsystem(ue, "drm");
|
|
|
|
if (m_types & Device_Mouse)
|
|
udev_enumerate_add_match_property(ue, "ID_INPUT_MOUSE", "1");
|
|
if (m_types & Device_Touchpad)
|
|
udev_enumerate_add_match_property(ue, "ID_INPUT_TOUCHPAD", "1");
|
|
if (m_types & Device_Touchscreen)
|
|
udev_enumerate_add_match_property(ue, "ID_INPUT_TOUCHSCREEN", "1");
|
|
if (m_types & Device_Keyboard) {
|
|
udev_enumerate_add_match_property(ue, "ID_INPUT_KEYBOARD", "1");
|
|
udev_enumerate_add_match_property(ue, "ID_INPUT_KEY", "1");
|
|
}
|
|
if (m_types & Device_Tablet)
|
|
udev_enumerate_add_match_property(ue, "ID_INPUT_TABLET", "1");
|
|
if (m_types & Device_Joystick)
|
|
udev_enumerate_add_match_property(ue, "ID_INPUT_JOYSTICK", "1");
|
|
|
|
if (udev_enumerate_scan_devices(ue) != 0) {
|
|
qWarning("Failed to scan devices");
|
|
return devices;
|
|
}
|
|
|
|
udev_list_entry *entry;
|
|
udev_list_entry_foreach (entry, udev_enumerate_get_list_entry(ue)) {
|
|
const char *syspath = udev_list_entry_get_name(entry);
|
|
udev_device *udevice = udev_device_new_from_syspath(m_udev, syspath);
|
|
QString candidate = QString::fromUtf8(udev_device_get_devnode(udevice));
|
|
if ((m_types & Device_InputMask) && candidate.startsWith(QLatin1String(QT_EVDEV_DEVICE)))
|
|
devices << candidate;
|
|
if ((m_types & Device_VideoMask) && candidate.startsWith(QLatin1String(QT_DRM_DEVICE))) {
|
|
if (m_types & Device_DRM_PrimaryGPU) {
|
|
udev_device *pci = udev_device_get_parent_with_subsystem_devtype(udevice, "pci", 0);
|
|
if (pci) {
|
|
if (qstrcmp(udev_device_get_sysattr_value(pci, "boot_vga"), "1") == 0)
|
|
devices << candidate;
|
|
}
|
|
} else
|
|
devices << candidate;
|
|
}
|
|
|
|
udev_device_unref(udevice);
|
|
}
|
|
udev_enumerate_unref(ue);
|
|
|
|
qCDebug(lcDD) << "Found matching devices" << devices;
|
|
|
|
return devices;
|
|
}
|
|
|
|
void QDeviceDiscoveryUDev::handleUDevNotification()
|
|
{
|
|
if (!m_udevMonitor)
|
|
return;
|
|
|
|
struct udev_device *dev;
|
|
QString devNode;
|
|
|
|
dev = udev_monitor_receive_device(m_udevMonitor);
|
|
if (!dev)
|
|
goto cleanup;
|
|
|
|
const char *action;
|
|
action = udev_device_get_action(dev);
|
|
if (!action)
|
|
goto cleanup;
|
|
|
|
const char *str;
|
|
str = udev_device_get_devnode(dev);
|
|
if (!str)
|
|
goto cleanup;
|
|
|
|
const char *subsystem;
|
|
devNode = QString::fromUtf8(str);
|
|
if (devNode.startsWith(QLatin1String(QT_EVDEV_DEVICE)))
|
|
subsystem = "input";
|
|
else if (devNode.startsWith(QLatin1String(QT_DRM_DEVICE)))
|
|
subsystem = "drm";
|
|
else goto cleanup;
|
|
|
|
// if we cannot determine a type, walk up the device tree
|
|
if (!checkDeviceType(dev)) {
|
|
// does not increase the refcount
|
|
dev = udev_device_get_parent_with_subsystem_devtype(dev, subsystem, 0);
|
|
if (!dev)
|
|
goto cleanup;
|
|
|
|
if (!checkDeviceType(dev))
|
|
goto cleanup;
|
|
}
|
|
|
|
if (qstrcmp(action, "add") == 0)
|
|
emit deviceDetected(devNode);
|
|
|
|
if (qstrcmp(action, "remove") == 0)
|
|
emit deviceRemoved(devNode);
|
|
|
|
cleanup:
|
|
udev_device_unref(dev);
|
|
}
|
|
|
|
bool QDeviceDiscoveryUDev::checkDeviceType(udev_device *dev)
|
|
{
|
|
if (!dev)
|
|
return false;
|
|
|
|
if ((m_types & Device_Keyboard) && (qstrcmp(udev_device_get_property_value(dev, "ID_INPUT_KEYBOARD"), "1") == 0 )) {
|
|
const char *capabilities_key = udev_device_get_sysattr_value(dev, "capabilities/key");
|
|
QStringList val = QString::fromUtf8(capabilities_key).split(QLatin1Char(' '), QString::SkipEmptyParts);
|
|
if (!val.isEmpty()) {
|
|
bool ok;
|
|
unsigned long long keys = val.last().toULongLong(&ok, 16);
|
|
if (ok) {
|
|
// Tests if the letter Q is valid for the device. We may want to alter this test, but it seems mostly reliable.
|
|
bool test = (keys >> KEY_Q) & 1;
|
|
if (test)
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
|
|
if ((m_types & Device_Keyboard) && (qstrcmp(udev_device_get_property_value(dev, "ID_INPUT_KEY"), "1") == 0 ))
|
|
return true;
|
|
|
|
if ((m_types & Device_Mouse) && (qstrcmp(udev_device_get_property_value(dev, "ID_INPUT_MOUSE"), "1") == 0))
|
|
return true;
|
|
|
|
if ((m_types & Device_Touchpad) && (qstrcmp(udev_device_get_property_value(dev, "ID_INPUT_TOUCHPAD"), "1") == 0))
|
|
return true;
|
|
|
|
if ((m_types & Device_Touchscreen) && (qstrcmp(udev_device_get_property_value(dev, "ID_INPUT_TOUCHSCREEN"), "1") == 0))
|
|
return true;
|
|
|
|
if ((m_types & Device_Tablet) && (qstrcmp(udev_device_get_property_value(dev, "ID_INPUT_TABLET"), "1") == 0))
|
|
return true;
|
|
|
|
if ((m_types & Device_Joystick) && (qstrcmp(udev_device_get_property_value(dev, "ID_INPUT_JOYSTICK"), "1") == 0))
|
|
return true;
|
|
|
|
if ((m_types & Device_DRM) && (qstrcmp(udev_device_get_subsystem(dev), "drm") == 0))
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
QT_END_NAMESPACE
|