| /* |
| * Copyright (C) 2005 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * 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 _RUNTIME_EVENT_HUB_H |
| #define _RUNTIME_EVENT_HUB_H |
| |
| #include <ui/Input.h> |
| #include <ui/Keyboard.h> |
| #include <ui/KeyLayoutMap.h> |
| #include <ui/KeyCharacterMap.h> |
| #include <ui/VirtualKeyMap.h> |
| #include <utils/String8.h> |
| #include <utils/threads.h> |
| #include <utils/Log.h> |
| #include <utils/threads.h> |
| #include <utils/List.h> |
| #include <utils/Errors.h> |
| #include <utils/PropertyMap.h> |
| #include <utils/Vector.h> |
| #include <utils/KeyedVector.h> |
| |
| #include <linux/input.h> |
| #include <sys/epoll.h> |
| |
| /* Convenience constants. */ |
| |
| #define BTN_FIRST 0x100 // first button scancode |
| #define BTN_LAST 0x15f // last button scancode |
| |
| namespace android { |
| |
| /* |
| * A raw event as retrieved from the EventHub. |
| */ |
| struct RawEvent { |
| nsecs_t when; |
| int32_t deviceId; |
| int32_t type; |
| int32_t scanCode; |
| int32_t keyCode; |
| int32_t value; |
| uint32_t flags; |
| }; |
| |
| /* Describes an absolute axis. */ |
| struct RawAbsoluteAxisInfo { |
| bool valid; // true if the information is valid, false otherwise |
| |
| int32_t minValue; // minimum value |
| int32_t maxValue; // maximum value |
| int32_t flat; // center flat position, eg. flat == 8 means center is between -8 and 8 |
| int32_t fuzz; // error tolerance, eg. fuzz == 4 means value is +/- 4 due to noise |
| int32_t resolution; // resolution in units per mm or radians per mm |
| |
| inline void clear() { |
| valid = false; |
| minValue = 0; |
| maxValue = 0; |
| flat = 0; |
| fuzz = 0; |
| resolution = 0; |
| } |
| }; |
| |
| /* |
| * Input device classes. |
| */ |
| enum { |
| /* The input device is a keyboard or has buttons. */ |
| INPUT_DEVICE_CLASS_KEYBOARD = 0x00000001, |
| |
| /* The input device is an alpha-numeric keyboard (not just a dial pad). */ |
| INPUT_DEVICE_CLASS_ALPHAKEY = 0x00000002, |
| |
| /* The input device is a touchscreen or a touchpad (either single-touch or multi-touch). */ |
| INPUT_DEVICE_CLASS_TOUCH = 0x00000004, |
| |
| /* The input device is a cursor device such as a trackball or mouse. */ |
| INPUT_DEVICE_CLASS_CURSOR = 0x00000008, |
| |
| /* The input device is a multi-touch touchscreen. */ |
| INPUT_DEVICE_CLASS_TOUCH_MT = 0x00000010, |
| |
| /* The input device is a directional pad (implies keyboard, has DPAD keys). */ |
| INPUT_DEVICE_CLASS_DPAD = 0x00000020, |
| |
| /* The input device is a gamepad (implies keyboard, has BUTTON keys). */ |
| INPUT_DEVICE_CLASS_GAMEPAD = 0x00000040, |
| |
| /* The input device has switches. */ |
| INPUT_DEVICE_CLASS_SWITCH = 0x00000080, |
| |
| /* The input device is a joystick (implies gamepad, has joystick absolute axes). */ |
| INPUT_DEVICE_CLASS_JOYSTICK = 0x00000100, |
| |
| /* The input device is external (not built-in). */ |
| INPUT_DEVICE_CLASS_EXTERNAL = 0x80000000, |
| }; |
| |
| /* |
| * Grand Central Station for events. |
| * |
| * The event hub aggregates input events received across all known input |
| * devices on the system, including devices that may be emulated by the simulator |
| * environment. In addition, the event hub generates fake input events to indicate |
| * when devices are added or removed. |
| * |
| * The event hub provides a stream of input events (via the getEvent function). |
| * It also supports querying the current actual state of input devices such as identifying |
| * which keys are currently down. Finally, the event hub keeps track of the capabilities of |
| * individual input devices, such as their class and the set of key codes that they support. |
| */ |
| class EventHubInterface : public virtual RefBase { |
| protected: |
| EventHubInterface() { } |
| virtual ~EventHubInterface() { } |
| |
| public: |
| // Synthetic raw event type codes produced when devices are added or removed. |
| enum { |
| // Sent when a device is added. |
| DEVICE_ADDED = 0x10000000, |
| // Sent when a device is removed. |
| DEVICE_REMOVED = 0x20000000, |
| // Sent when all added/removed devices from the most recent scan have been reported. |
| // This event is always sent at least once. |
| FINISHED_DEVICE_SCAN = 0x30000000, |
| |
| FIRST_SYNTHETIC_EVENT = DEVICE_ADDED, |
| }; |
| |
| virtual uint32_t getDeviceClasses(int32_t deviceId) const = 0; |
| |
| virtual String8 getDeviceName(int32_t deviceId) const = 0; |
| |
| virtual void getConfiguration(int32_t deviceId, PropertyMap* outConfiguration) const = 0; |
| |
| virtual status_t getAbsoluteAxisInfo(int32_t deviceId, int axis, |
| RawAbsoluteAxisInfo* outAxisInfo) const = 0; |
| |
| virtual bool hasRelativeAxis(int32_t deviceId, int axis) const = 0; |
| |
| virtual bool hasInputProperty(int32_t deviceId, int property) const = 0; |
| |
| virtual status_t mapKey(int32_t deviceId, int scancode, |
| int32_t* outKeycode, uint32_t* outFlags) const = 0; |
| |
| virtual status_t mapAxis(int32_t deviceId, int scancode, |
| AxisInfo* outAxisInfo) const = 0; |
| |
| // Sets devices that are excluded from opening. |
| // This can be used to ignore input devices for sensors. |
| virtual void setExcludedDevices(const Vector<String8>& devices) = 0; |
| |
| /* |
| * Wait for events to become available and returns them. |
| * After returning, the EventHub holds onto a wake lock until the next call to getEvent. |
| * This ensures that the device will not go to sleep while the event is being processed. |
| * If the device needs to remain awake longer than that, then the caller is responsible |
| * for taking care of it (say, by poking the power manager user activity timer). |
| * |
| * The timeout is advisory only. If the device is asleep, it will not wake just to |
| * service the timeout. |
| * |
| * Returns the number of events obtained, or 0 if the timeout expired. |
| */ |
| virtual size_t getEvents(int timeoutMillis, RawEvent* buffer, size_t bufferSize) = 0; |
| |
| /* |
| * Query current input state. |
| */ |
| virtual int32_t getScanCodeState(int32_t deviceId, int32_t scanCode) const = 0; |
| virtual int32_t getKeyCodeState(int32_t deviceId, int32_t keyCode) const = 0; |
| virtual int32_t getSwitchState(int32_t deviceId, int32_t sw) const = 0; |
| virtual status_t getAbsoluteAxisValue(int32_t deviceId, int32_t axis, |
| int32_t* outValue) const = 0; |
| |
| /* |
| * Examine key input devices for specific framework keycode support |
| */ |
| virtual bool markSupportedKeyCodes(int32_t deviceId, size_t numCodes, const int32_t* keyCodes, |
| uint8_t* outFlags) const = 0; |
| |
| virtual bool hasScanCode(int32_t deviceId, int32_t scanCode) const = 0; |
| virtual bool hasLed(int32_t deviceId, int32_t led) const = 0; |
| virtual void setLedState(int32_t deviceId, int32_t led, bool on) = 0; |
| |
| virtual void getVirtualKeyDefinitions(int32_t deviceId, |
| Vector<VirtualKeyDefinition>& outVirtualKeys) const = 0; |
| |
| /* Requests the EventHub to reopen all input devices on the next call to getEvents(). */ |
| virtual void requestReopenDevices() = 0; |
| |
| /* Wakes up getEvents() if it is blocked on a read. */ |
| virtual void wake() = 0; |
| |
| virtual void dump(String8& dump) = 0; |
| }; |
| |
| class EventHub : public EventHubInterface |
| { |
| public: |
| EventHub(); |
| |
| virtual uint32_t getDeviceClasses(int32_t deviceId) const; |
| |
| virtual String8 getDeviceName(int32_t deviceId) const; |
| |
| virtual void getConfiguration(int32_t deviceId, PropertyMap* outConfiguration) const; |
| |
| virtual status_t getAbsoluteAxisInfo(int32_t deviceId, int axis, |
| RawAbsoluteAxisInfo* outAxisInfo) const; |
| |
| virtual bool hasRelativeAxis(int32_t deviceId, int axis) const; |
| |
| virtual bool hasInputProperty(int32_t deviceId, int property) const; |
| |
| virtual status_t mapKey(int32_t deviceId, int scancode, |
| int32_t* outKeycode, uint32_t* outFlags) const; |
| |
| virtual status_t mapAxis(int32_t deviceId, int scancode, |
| AxisInfo* outAxisInfo) const; |
| |
| virtual void setExcludedDevices(const Vector<String8>& devices); |
| |
| virtual int32_t getScanCodeState(int32_t deviceId, int32_t scanCode) const; |
| virtual int32_t getKeyCodeState(int32_t deviceId, int32_t keyCode) const; |
| virtual int32_t getSwitchState(int32_t deviceId, int32_t sw) const; |
| virtual status_t getAbsoluteAxisValue(int32_t deviceId, int32_t axis, int32_t* outValue) const; |
| |
| virtual bool markSupportedKeyCodes(int32_t deviceId, size_t numCodes, |
| const int32_t* keyCodes, uint8_t* outFlags) const; |
| |
| virtual size_t getEvents(int timeoutMillis, RawEvent* buffer, size_t bufferSize); |
| |
| virtual bool hasScanCode(int32_t deviceId, int32_t scanCode) const; |
| virtual bool hasLed(int32_t deviceId, int32_t led) const; |
| virtual void setLedState(int32_t deviceId, int32_t led, bool on); |
| |
| virtual void getVirtualKeyDefinitions(int32_t deviceId, |
| Vector<VirtualKeyDefinition>& outVirtualKeys) const; |
| |
| virtual void requestReopenDevices(); |
| |
| virtual void wake(); |
| |
| virtual void dump(String8& dump); |
| |
| protected: |
| virtual ~EventHub(); |
| |
| private: |
| struct Device { |
| Device* next; |
| |
| int fd; |
| const int32_t id; |
| const String8 path; |
| const InputDeviceIdentifier identifier; |
| |
| uint32_t classes; |
| |
| uint8_t keyBitmask[(KEY_MAX + 1) / 8]; |
| uint8_t absBitmask[(ABS_MAX + 1) / 8]; |
| uint8_t relBitmask[(REL_MAX + 1) / 8]; |
| uint8_t swBitmask[(SW_MAX + 1) / 8]; |
| uint8_t ledBitmask[(LED_MAX + 1) / 8]; |
| uint8_t propBitmask[(INPUT_PROP_MAX + 1) / 8]; |
| |
| String8 configurationFile; |
| PropertyMap* configuration; |
| VirtualKeyMap* virtualKeyMap; |
| KeyMap keyMap; |
| |
| Device(int fd, int32_t id, const String8& path, const InputDeviceIdentifier& identifier); |
| ~Device(); |
| |
| void close(); |
| }; |
| |
| status_t openDeviceLocked(const char *devicePath); |
| status_t closeDeviceByPathLocked(const char *devicePath); |
| |
| void closeDeviceLocked(Device* device); |
| void closeAllDevicesLocked(); |
| |
| status_t scanDirLocked(const char *dirname); |
| void scanDevicesLocked(); |
| status_t readNotifyLocked(); |
| |
| Device* getDeviceLocked(int32_t deviceId) const; |
| Device* getDeviceByPathLocked(const char* devicePath) const; |
| |
| bool hasKeycodeLocked(Device* device, int keycode) const; |
| |
| int32_t getScanCodeStateLocked(Device* device, int32_t scanCode) const; |
| int32_t getKeyCodeStateLocked(Device* device, int32_t keyCode) const; |
| int32_t getSwitchStateLocked(Device* device, int32_t sw) const; |
| int32_t getAbsoluteAxisValueLocked(Device* device, int32_t axis, int32_t* outValue) const; |
| bool markSupportedKeyCodesLocked(Device* device, size_t numCodes, |
| const int32_t* keyCodes, uint8_t* outFlags) const; |
| |
| void loadConfigurationLocked(Device* device); |
| status_t loadVirtualKeyMapLocked(Device* device); |
| status_t loadKeyMapLocked(Device* device); |
| void setKeyboardPropertiesLocked(Device* device, bool builtInKeyboard); |
| void clearKeyboardPropertiesLocked(Device* device, bool builtInKeyboard); |
| |
| bool isExternalDeviceLocked(Device* device); |
| |
| // Protect all internal state. |
| mutable Mutex mLock; |
| |
| // The actual id of the built-in keyboard, or -1 if none. |
| // EventHub remaps the built-in keyboard to id 0 externally as required by the API. |
| int32_t mBuiltInKeyboardId; |
| |
| int32_t mNextDeviceId; |
| |
| KeyedVector<int32_t, Device*> mDevices; |
| |
| Device *mOpeningDevices; |
| Device *mClosingDevices; |
| |
| bool mNeedToSendFinishedDeviceScan; |
| bool mNeedToReopenDevices; |
| bool mNeedToScanDevices; |
| Vector<String8> mExcludedDevices; |
| |
| int mEpollFd; |
| int mINotifyFd; |
| int mWakeReadPipeFd; |
| int mWakeWritePipeFd; |
| |
| // Ids used for epoll notifications not associated with devices. |
| static const uint32_t EPOLL_ID_INOTIFY = 0x80000001; |
| static const uint32_t EPOLL_ID_WAKE = 0x80000002; |
| |
| // Epoll FD list size hint. |
| static const int EPOLL_SIZE_HINT = 8; |
| |
| // Maximum number of signalled FDs to handle at a time. |
| static const int EPOLL_MAX_EVENTS = 16; |
| |
| // The array of pending epoll events and the index of the next event to be handled. |
| struct epoll_event mPendingEventItems[EPOLL_MAX_EVENTS]; |
| size_t mPendingEventCount; |
| size_t mPendingEventIndex; |
| bool mPendingINotify; |
| |
| // Set to the number of CPUs. |
| int32_t mNumCpus; |
| }; |
| |
| }; // namespace android |
| |
| #endif // _RUNTIME_EVENT_HUB_H |