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/************************************************************************************
Filename : OVR_Linux_HIDDevice.h
Content : Linux HID device implementation.
Created : June 13, 2013
Authors : Brant Lewis
Copyright : Copyright 2013 Oculus VR, Inc. All Rights reserved.
Licensed under the Oculus VR SDK License Version 2.0 (the "License");
you may not use the Oculus VR SDK except in compliance with the License,
which is provided at the time of installation or download, or which
otherwise accompanies this software in either electronic or hard copy form.
You may obtain a copy of the License at
http://www.oculusvr.com/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, the Oculus VR SDK
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*************************************************************************************/
#ifndef OVR_LINUX_HIDDevice_h
#define OVR_LINUX_HIDDevice_h
#include "OVR_HIDDevice.h"
#include "OVR_Linux_DeviceManager.h"
#include <libudev.h>
namespace OVR { namespace Linux {
class HIDDeviceManager;
//-------------------------------------------------------------------------------------
// ***** Linux HIDDevice
class HIDDevice : public OVR::HIDDevice, public DeviceManagerThread::Notifier
{
private:
friend class HIDDeviceManager;
public:
HIDDevice(HIDDeviceManager* manager);
// This is a minimal constructor used during enumeration for us to pass
// a HIDDevice to the visit function (so that it can query feature reports).
HIDDevice(HIDDeviceManager* manager, int device_handle);
virtual ~HIDDevice();
bool HIDInitialize(const String& path);
void HIDShutdown();
virtual bool SetFeatureReport(UByte* data, UInt32 length);
virtual bool GetFeatureReport(UByte* data, UInt32 length);
// DeviceManagerThread::Notifier
void OnEvent(int i, int fd);
UInt64 OnTicks(UInt64 ticksMks);
bool OnDeviceNotification(MessageType messageType,
HIDDeviceDesc* device_info,
bool* error);
private:
bool initInfo();
bool openDevice(const char* dev_path);
void closeDevice(bool wasUnplugged);
void closeDeviceOnIOError();
bool setupDevicePluggedInNotification();
bool InMinimalMode;
HIDDeviceManager* HIDManager;
int DeviceHandle; // file handle to the device
HIDDeviceDesc DevDesc;
enum { ReadBufferSize = 96 };
UByte ReadBuffer[ReadBufferSize];
UInt16 InputReportBufferLength;
UInt16 OutputReportBufferLength;
UInt16 FeatureReportBufferLength;
};
//-------------------------------------------------------------------------------------
// ***** Linux HIDDeviceManager
class HIDDeviceManager : public OVR::HIDDeviceManager, public DeviceManagerThread::Notifier
{
friend class HIDDevice;
public:
HIDDeviceManager(Linux::DeviceManager* Manager);
virtual ~HIDDeviceManager();
virtual bool Initialize();
virtual void Shutdown();
virtual bool Enumerate(HIDEnumerateVisitor* enumVisitor);
virtual OVR::HIDDevice* Open(const String& path);
static HIDDeviceManager* CreateInternal(DeviceManager* manager);
void OnEvent(int i, int fd);
private:
bool initializeManager();
bool initVendorProductVersion(udev_device* device, HIDDeviceDesc* pDevDesc);
bool getPath(udev_device* device, String* pPath);
bool getIntProperty(udev_device* device, const char* key, int32_t* pResult);
bool getStringProperty(udev_device* device,
const char* propertyName,
OVR::String* pResult);
bool getFullDesc(udev_device* device, HIDDeviceDesc* desc);
bool GetDescriptorFromPath(const char* dev_path, HIDDeviceDesc* desc);
bool AddNotificationDevice(HIDDevice* device);
bool RemoveNotificationDevice(HIDDevice* device);
DeviceManager* DevManager;
udev* UdevInstance; // a handle to the udev library instance
udev_monitor* HIDMonitor;
int HIDMonHandle; // the udev_monitor file handle
Array<HIDDevice*> NotificationDevices;
};
}} // namespace OVR::Linux
#endif // OVR_Linux_HIDDevice_h
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