/* * 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. */ // // Handle events, like key input and vsync. // // The goal is to provide an optimized solution for Linux, not an // implementation that works well across all platforms. We expect // events to arrive on file descriptors, so that we can use a select() // select() call to sleep. // // We can't select() on anything but network sockets in Windows, so we // provide an alternative implementation of waitEvent for that platform. // #define LOG_TAG "EventHub" //#define LOG_NDEBUG 0 #include "EventHub.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef HAVE_INOTIFY # include #endif #ifdef HAVE_ANDROID_OS # include /* not part of Linux */ #endif #include #include /* this macro is used to tell if "bit" is set in "array" * it selects a byte from the array, and does a boolean AND * operation with a byte that only has the relevant bit set. * eg. to check for the 12th bit, we do (array[1] & 1<<4) */ #define test_bit(bit, array) (array[bit/8] & (1<<(bit%8))) /* this macro computes the number of bytes needed to represent a bit array of the specified size */ #define sizeof_bit_array(bits) ((bits + 7) / 8) // Fd at index 0 is always reserved for inotify #define FIRST_ACTUAL_DEVICE_INDEX 1 #define INDENT " " #define INDENT2 " " #define INDENT3 " " namespace android { static const char *WAKE_LOCK_ID = "KeyEvents"; static const char *DEVICE_PATH = "/dev/input"; /* return the larger integer */ static inline int max(int v1, int v2) { return (v1 > v2) ? v1 : v2; } static inline const char* toString(bool value) { return value ? "true" : "false"; } // --- EventHub::Device --- EventHub::Device::Device(int fd, int32_t id, const String8& path, const InputDeviceIdentifier& identifier) : next(NULL), fd(fd), id(id), path(path), identifier(identifier), classes(0), keyBitmask(NULL), relBitmask(NULL), configuration(NULL), virtualKeyMap(NULL) { } EventHub::Device::~Device() { close(); delete[] keyBitmask; delete[] relBitmask; delete configuration; delete virtualKeyMap; } void EventHub::Device::close() { if (fd >= 0) { ::close(fd); fd = -1; } } // --- EventHub --- EventHub::EventHub(void) : mError(NO_INIT), mBuiltInKeyboardId(-1), mNextDeviceId(1), mOpeningDevices(0), mClosingDevices(0), mOpened(false), mNeedToSendFinishedDeviceScan(false), mInputBufferIndex(0), mInputBufferCount(0), mInputFdIndex(0) { acquire_wake_lock(PARTIAL_WAKE_LOCK, WAKE_LOCK_ID); memset(mSwitches, 0, sizeof(mSwitches)); } EventHub::~EventHub(void) { release_wake_lock(WAKE_LOCK_ID); // we should free stuff here... } status_t EventHub::errorCheck() const { return mError; } String8 EventHub::getDeviceName(int32_t deviceId) const { AutoMutex _l(mLock); Device* device = getDeviceLocked(deviceId); if (device == NULL) return String8(); return device->identifier.name; } uint32_t EventHub::getDeviceClasses(int32_t deviceId) const { AutoMutex _l(mLock); Device* device = getDeviceLocked(deviceId); if (device == NULL) return 0; return device->classes; } void EventHub::getConfiguration(int32_t deviceId, PropertyMap* outConfiguration) const { AutoMutex _l(mLock); Device* device = getDeviceLocked(deviceId); if (device && device->configuration) { *outConfiguration = *device->configuration; } else { outConfiguration->clear(); } } status_t EventHub::getAbsoluteAxisInfo(int32_t deviceId, int axis, RawAbsoluteAxisInfo* outAxisInfo) const { outAxisInfo->clear(); AutoMutex _l(mLock); Device* device = getDeviceLocked(deviceId); if (device == NULL) return -1; struct input_absinfo info; if(ioctl(device->fd, EVIOCGABS(axis), &info)) { LOGW("Error reading absolute controller %d for device %s fd %d\n", axis, device->identifier.name.string(), device->fd); return -errno; } if (info.minimum != info.maximum) { outAxisInfo->valid = true; outAxisInfo->minValue = info.minimum; outAxisInfo->maxValue = info.maximum; outAxisInfo->flat = info.flat; outAxisInfo->fuzz = info.fuzz; } return OK; } bool EventHub::hasRelativeAxis(int32_t deviceId, int axis) const { if (axis >= 0 && axis <= REL_MAX) { AutoMutex _l(mLock); Device* device = getDeviceLocked(deviceId); if (device && device->relBitmask) { return test_bit(axis, device->relBitmask); } } return false; } int32_t EventHub::getScanCodeState(int32_t deviceId, int32_t scanCode) const { if (scanCode >= 0 && scanCode <= KEY_MAX) { AutoMutex _l(mLock); Device* device = getDeviceLocked(deviceId); if (device != NULL) { return getScanCodeStateLocked(device, scanCode); } } return AKEY_STATE_UNKNOWN; } int32_t EventHub::getScanCodeStateLocked(Device* device, int32_t scanCode) const { uint8_t key_bitmask[sizeof_bit_array(KEY_MAX + 1)]; memset(key_bitmask, 0, sizeof(key_bitmask)); if (ioctl(device->fd, EVIOCGKEY(sizeof(key_bitmask)), key_bitmask) >= 0) { return test_bit(scanCode, key_bitmask) ? AKEY_STATE_DOWN : AKEY_STATE_UP; } return AKEY_STATE_UNKNOWN; } int32_t EventHub::getKeyCodeState(int32_t deviceId, int32_t keyCode) const { AutoMutex _l(mLock); Device* device = getDeviceLocked(deviceId); if (device != NULL) { return getKeyCodeStateLocked(device, keyCode); } return AKEY_STATE_UNKNOWN; } int32_t EventHub::getKeyCodeStateLocked(Device* device, int32_t keyCode) const { if (!device->keyMap.haveKeyLayout()) { return AKEY_STATE_UNKNOWN; } Vector scanCodes; device->keyMap.keyLayoutMap->findScanCodesForKey(keyCode, &scanCodes); uint8_t key_bitmask[sizeof_bit_array(KEY_MAX + 1)]; memset(key_bitmask, 0, sizeof(key_bitmask)); if (ioctl(device->fd, EVIOCGKEY(sizeof(key_bitmask)), key_bitmask) >= 0) { #if 0 for (size_t i=0; i<=KEY_MAX; i++) { LOGI("(Scan code %d: down=%d)", i, test_bit(i, key_bitmask)); } #endif const size_t N = scanCodes.size(); for (size_t i=0; i= 0 && sc <= KEY_MAX && test_bit(sc, key_bitmask)) { return AKEY_STATE_DOWN; } } return AKEY_STATE_UP; } return AKEY_STATE_UNKNOWN; } int32_t EventHub::getSwitchState(int32_t deviceId, int32_t sw) const { if (sw >= 0 && sw <= SW_MAX) { AutoMutex _l(mLock); Device* device = getDeviceLocked(deviceId); if (device != NULL) { return getSwitchStateLocked(device, sw); } } return AKEY_STATE_UNKNOWN; } int32_t EventHub::getSwitchStateLocked(Device* device, int32_t sw) const { uint8_t sw_bitmask[sizeof_bit_array(SW_MAX + 1)]; memset(sw_bitmask, 0, sizeof(sw_bitmask)); if (ioctl(device->fd, EVIOCGSW(sizeof(sw_bitmask)), sw_bitmask) >= 0) { return test_bit(sw, sw_bitmask) ? AKEY_STATE_DOWN : AKEY_STATE_UP; } return AKEY_STATE_UNKNOWN; } bool EventHub::markSupportedKeyCodes(int32_t deviceId, size_t numCodes, const int32_t* keyCodes, uint8_t* outFlags) const { AutoMutex _l(mLock); Device* device = getDeviceLocked(deviceId); if (device != NULL) { return markSupportedKeyCodesLocked(device, numCodes, keyCodes, outFlags); } return false; } bool EventHub::markSupportedKeyCodesLocked(Device* device, size_t numCodes, const int32_t* keyCodes, uint8_t* outFlags) const { if (!device->keyMap.haveKeyLayout() || !device->keyBitmask) { return false; } Vector scanCodes; for (size_t codeIndex = 0; codeIndex < numCodes; codeIndex++) { scanCodes.clear(); status_t err = device->keyMap.keyLayoutMap->findScanCodesForKey( keyCodes[codeIndex], &scanCodes); if (! err) { // check the possible scan codes identified by the layout map against the // map of codes actually emitted by the driver for (size_t sc = 0; sc < scanCodes.size(); sc++) { if (test_bit(scanCodes[sc], device->keyBitmask)) { outFlags[codeIndex] = 1; break; } } } } return true; } status_t EventHub::mapKey(int32_t deviceId, int scancode, int32_t* outKeycode, uint32_t* outFlags) const { AutoMutex _l(mLock); Device* device = getDeviceLocked(deviceId); if (device && device->keyMap.haveKeyLayout()) { status_t err = device->keyMap.keyLayoutMap->mapKey(scancode, outKeycode, outFlags); if (err == NO_ERROR) { return NO_ERROR; } } if (mBuiltInKeyboardId != -1) { device = getDeviceLocked(mBuiltInKeyboardId); if (device && device->keyMap.haveKeyLayout()) { status_t err = device->keyMap.keyLayoutMap->mapKey(scancode, outKeycode, outFlags); if (err == NO_ERROR) { return NO_ERROR; } } } *outKeycode = 0; *outFlags = 0; return NAME_NOT_FOUND; } status_t EventHub::mapAxis(int32_t deviceId, int scancode, int32_t* outAxis) const { AutoMutex _l(mLock); Device* device = getDeviceLocked(deviceId); if (device && device->keyMap.haveKeyLayout()) { status_t err = device->keyMap.keyLayoutMap->mapAxis(scancode, outAxis); if (err == NO_ERROR) { return NO_ERROR; } } if (mBuiltInKeyboardId != -1) { device = getDeviceLocked(mBuiltInKeyboardId); if (device && device->keyMap.haveKeyLayout()) { status_t err = device->keyMap.keyLayoutMap->mapAxis(scancode, outAxis); if (err == NO_ERROR) { return NO_ERROR; } } } *outAxis = -1; return NAME_NOT_FOUND; } void EventHub::addExcludedDevice(const char* deviceName) { AutoMutex _l(mLock); String8 name(deviceName); mExcludedDevices.push_back(name); } bool EventHub::hasLed(int32_t deviceId, int32_t led) const { AutoMutex _l(mLock); Device* device = getDeviceLocked(deviceId); if (device) { uint8_t bitmask[sizeof_bit_array(LED_MAX + 1)]; memset(bitmask, 0, sizeof(bitmask)); if (ioctl(device->fd, EVIOCGBIT(EV_LED, sizeof(bitmask)), bitmask) >= 0) { if (test_bit(led, bitmask)) { return true; } } } return false; } void EventHub::setLedState(int32_t deviceId, int32_t led, bool on) { AutoMutex _l(mLock); Device* device = getDeviceLocked(deviceId); if (device) { struct input_event ev; ev.time.tv_sec = 0; ev.time.tv_usec = 0; ev.type = EV_LED; ev.code = led; ev.value = on ? 1 : 0; ssize_t nWrite; do { nWrite = write(device->fd, &ev, sizeof(struct input_event)); } while (nWrite == -1 && errno == EINTR); } } void EventHub::getVirtualKeyDefinitions(int32_t deviceId, Vector& outVirtualKeys) const { outVirtualKeys.clear(); AutoMutex _l(mLock); Device* device = getDeviceLocked(deviceId); if (device && device->virtualKeyMap) { outVirtualKeys.appendVector(device->virtualKeyMap->getVirtualKeys()); } } EventHub::Device* EventHub::getDeviceLocked(int32_t deviceId) const { if (deviceId == 0) { deviceId = mBuiltInKeyboardId; } size_t numDevices = mDevices.size(); for (size_t i = FIRST_ACTUAL_DEVICE_INDEX; i < numDevices; i++) { Device* device = mDevices[i]; if (device->id == deviceId) { return device; } } return NULL; } bool EventHub::getEvent(RawEvent* outEvent) { outEvent->deviceId = 0; outEvent->type = 0; outEvent->scanCode = 0; outEvent->keyCode = 0; outEvent->flags = 0; outEvent->value = 0; outEvent->when = 0; // Note that we only allow one caller to getEvent(), so don't need // to do locking here... only when adding/removing devices. if (!mOpened) { mError = openPlatformInput() ? NO_ERROR : UNKNOWN_ERROR; mOpened = true; mNeedToSendFinishedDeviceScan = true; } for (;;) { // Report any devices that had last been added/removed. if (mClosingDevices != NULL) { Device* device = mClosingDevices; LOGV("Reporting device closed: id=%d, name=%s\n", device->id, device->path.string()); mClosingDevices = device->next; if (device->id == mBuiltInKeyboardId) { outEvent->deviceId = 0; } else { outEvent->deviceId = device->id; } outEvent->type = DEVICE_REMOVED; outEvent->when = systemTime(SYSTEM_TIME_MONOTONIC); delete device; mNeedToSendFinishedDeviceScan = true; return true; } if (mOpeningDevices != NULL) { Device* device = mOpeningDevices; LOGV("Reporting device opened: id=%d, name=%s\n", device->id, device->path.string()); mOpeningDevices = device->next; if (device->id == mBuiltInKeyboardId) { outEvent->deviceId = 0; } else { outEvent->deviceId = device->id; } outEvent->type = DEVICE_ADDED; outEvent->when = systemTime(SYSTEM_TIME_MONOTONIC); mNeedToSendFinishedDeviceScan = true; return true; } if (mNeedToSendFinishedDeviceScan) { mNeedToSendFinishedDeviceScan = false; outEvent->type = FINISHED_DEVICE_SCAN; outEvent->when = systemTime(SYSTEM_TIME_MONOTONIC); return true; } // Grab the next input event. bool deviceWasRemoved = false; for (;;) { // Consume buffered input events, if any. if (mInputBufferIndex < mInputBufferCount) { const struct input_event& iev = mInputBufferData[mInputBufferIndex++]; const Device* device = mDevices[mInputFdIndex]; LOGV("%s got: t0=%d, t1=%d, type=%d, code=%d, v=%d", device->path.string(), (int) iev.time.tv_sec, (int) iev.time.tv_usec, iev.type, iev.code, iev.value); if (device->id == mBuiltInKeyboardId) { outEvent->deviceId = 0; } else { outEvent->deviceId = device->id; } outEvent->type = iev.type; outEvent->scanCode = iev.code; outEvent->flags = 0; if (iev.type == EV_KEY) { outEvent->keyCode = AKEYCODE_UNKNOWN; if (device->keyMap.haveKeyLayout()) { status_t err = device->keyMap.keyLayoutMap->mapKey(iev.code, &outEvent->keyCode, &outEvent->flags); LOGV("iev.code=%d keyCode=%d flags=0x%08x err=%d\n", iev.code, outEvent->keyCode, outEvent->flags, err); } } else { outEvent->keyCode = iev.code; } outEvent->value = iev.value; // Use an event timestamp in the same timebase as // java.lang.System.nanoTime() and android.os.SystemClock.uptimeMillis() // as expected by the rest of the system. outEvent->when = systemTime(SYSTEM_TIME_MONOTONIC); return true; } // Finish reading all events from devices identified in previous poll(). // This code assumes that mInputDeviceIndex is initially 0 and that the // revents member of pollfd is initialized to 0 when the device is first added. // Since mFds[0] is used for inotify, we process regular events starting at index 1. mInputFdIndex += 1; if (mInputFdIndex >= mFds.size()) { break; } const struct pollfd& pfd = mFds[mInputFdIndex]; if (pfd.revents & POLLIN) { int32_t readSize = read(pfd.fd, mInputBufferData, sizeof(struct input_event) * INPUT_BUFFER_SIZE); if (readSize < 0) { if (errno == ENODEV) { deviceWasRemoved = true; break; } if (errno != EAGAIN && errno != EINTR) { LOGW("could not get event (errno=%d)", errno); } } else if ((readSize % sizeof(struct input_event)) != 0) { LOGE("could not get event (wrong size: %d)", readSize); } else { mInputBufferCount = size_t(readSize) / sizeof(struct input_event); mInputBufferIndex = 0; } } } // Handle the case where a device has been removed but INotify has not yet noticed. if (deviceWasRemoved) { AutoMutex _l(mLock); closeDeviceAtIndexLocked(mInputFdIndex); continue; // report added or removed devices immediately } #if HAVE_INOTIFY // readNotify() will modify mFDs and mFDCount, so this must be done after // processing all other events. if(mFds[0].revents & POLLIN) { readNotify(mFds[0].fd); mFds.editItemAt(0).revents = 0; continue; // report added or removed devices immediately } #endif // Poll for events. Mind the wake lock dance! // We hold a wake lock at all times except during poll(). This works due to some // subtle choreography. When a device driver has pending (unread) events, it acquires // a kernel wake lock. However, once the last pending event has been read, the device // driver will release the kernel wake lock. To prevent the system from going to sleep // when this happens, the EventHub holds onto its own user wake lock while the client // is processing events. Thus the system can only sleep if there are no events // pending or currently being processed. release_wake_lock(WAKE_LOCK_ID); int pollResult = poll(mFds.editArray(), mFds.size(), -1); acquire_wake_lock(PARTIAL_WAKE_LOCK, WAKE_LOCK_ID); if (pollResult <= 0) { if (errno != EINTR) { LOGW("poll failed (errno=%d)\n", errno); usleep(100000); } } // Prepare to process all of the FDs we just polled. mInputFdIndex = 0; } } /* * Open the platform-specific input device. */ bool EventHub::openPlatformInput(void) { /* * Open platform-specific input device(s). */ int res, fd; #ifdef HAVE_INOTIFY fd = inotify_init(); res = inotify_add_watch(fd, DEVICE_PATH, IN_DELETE | IN_CREATE); if(res < 0) { LOGE("could not add watch for %s, %s\n", DEVICE_PATH, strerror(errno)); } #else /* * The code in EventHub::getEvent assumes that mFDs[0] is an inotify fd. * We allocate space for it and set it to something invalid. */ fd = -1; #endif // Reserve fd index 0 for inotify. struct pollfd pollfd; pollfd.fd = fd; pollfd.events = POLLIN; pollfd.revents = 0; mFds.push(pollfd); mDevices.push(NULL); res = scanDir(DEVICE_PATH); if(res < 0) { LOGE("scan dir failed for %s\n", DEVICE_PATH); } return true; } // ---------------------------------------------------------------------------- static bool containsNonZeroByte(const uint8_t* array, uint32_t startIndex, uint32_t endIndex) { const uint8_t* end = array + endIndex; array += startIndex; while (array != end) { if (*(array++) != 0) { return true; } } return false; } static const int32_t GAMEPAD_KEYCODES[] = { AKEYCODE_BUTTON_A, AKEYCODE_BUTTON_B, AKEYCODE_BUTTON_C, AKEYCODE_BUTTON_X, AKEYCODE_BUTTON_Y, AKEYCODE_BUTTON_Z, AKEYCODE_BUTTON_L1, AKEYCODE_BUTTON_R1, AKEYCODE_BUTTON_L2, AKEYCODE_BUTTON_R2, AKEYCODE_BUTTON_THUMBL, AKEYCODE_BUTTON_THUMBR, AKEYCODE_BUTTON_START, AKEYCODE_BUTTON_SELECT, AKEYCODE_BUTTON_MODE, AKEYCODE_BUTTON_1, AKEYCODE_BUTTON_2, AKEYCODE_BUTTON_3, AKEYCODE_BUTTON_4, AKEYCODE_BUTTON_5, AKEYCODE_BUTTON_6, AKEYCODE_BUTTON_7, AKEYCODE_BUTTON_8, AKEYCODE_BUTTON_9, AKEYCODE_BUTTON_10, AKEYCODE_BUTTON_11, AKEYCODE_BUTTON_12, AKEYCODE_BUTTON_13, AKEYCODE_BUTTON_14, AKEYCODE_BUTTON_15, AKEYCODE_BUTTON_16, }; int EventHub::openDevice(const char *devicePath) { char buffer[80]; LOGV("Opening device: %s", devicePath); AutoMutex _l(mLock); int fd = open(devicePath, O_RDWR); if(fd < 0) { LOGE("could not open %s, %s\n", devicePath, strerror(errno)); return -1; } InputDeviceIdentifier identifier; // Get device name. if(ioctl(fd, EVIOCGNAME(sizeof(buffer) - 1), &buffer) < 1) { //fprintf(stderr, "could not get device name for %s, %s\n", devicePath, strerror(errno)); } else { buffer[sizeof(buffer) - 1] = '\0'; identifier.name.setTo(buffer); } // Check to see if the device is on our excluded list List::iterator iter = mExcludedDevices.begin(); List::iterator end = mExcludedDevices.end(); for ( ; iter != end; iter++) { const char* test = *iter; if (identifier.name == test) { LOGI("ignoring event id %s driver %s\n", devicePath, test); close(fd); return -1; } } // Get device driver version. int driverVersion; if(ioctl(fd, EVIOCGVERSION, &driverVersion)) { LOGE("could not get driver version for %s, %s\n", devicePath, strerror(errno)); close(fd); return -1; } // Get device identifier. struct input_id inputId; if(ioctl(fd, EVIOCGID, &inputId)) { LOGE("could not get device input id for %s, %s\n", devicePath, strerror(errno)); close(fd); return -1; } identifier.bus = inputId.bustype; identifier.product = inputId.product; identifier.vendor = inputId.vendor; identifier.version = inputId.version; // Get device physical location. if(ioctl(fd, EVIOCGPHYS(sizeof(buffer) - 1), &buffer) < 1) { //fprintf(stderr, "could not get location for %s, %s\n", devicePath, strerror(errno)); } else { buffer[sizeof(buffer) - 1] = '\0'; identifier.location.setTo(buffer); } // Get device unique id. if(ioctl(fd, EVIOCGUNIQ(sizeof(buffer) - 1), &buffer) < 1) { //fprintf(stderr, "could not get idstring for %s, %s\n", devicePath, strerror(errno)); } else { buffer[sizeof(buffer) - 1] = '\0'; identifier.uniqueId.setTo(buffer); } // Make file descriptor non-blocking for use with poll(). if (fcntl(fd, F_SETFL, O_NONBLOCK)) { LOGE("Error %d making device file descriptor non-blocking.", errno); close(fd); return -1; } // Allocate device. (The device object takes ownership of the fd at this point.) int32_t deviceId = mNextDeviceId++; Device* device = new Device(fd, deviceId, String8(devicePath), identifier); #if 0 LOGI("add device %d: %s\n", deviceId, devicePath); LOGI(" bus: %04x\n" " vendor %04x\n" " product %04x\n" " version %04x\n", identifier.bus, identifier.vendor, identifier.product, identifier.version); LOGI(" name: \"%s\"\n", identifier.name.string()); LOGI(" location: \"%s\"\n", identifier.location.string()); LOGI(" unique id: \"%s\"\n", identifier.uniqueId.string()); LOGI(" driver: v%d.%d.%d\n", driverVersion >> 16, (driverVersion >> 8) & 0xff, driverVersion & 0xff); #endif // Load the configuration file for the device. loadConfiguration(device); // Figure out the kinds of events the device reports. uint8_t key_bitmask[sizeof_bit_array(KEY_MAX + 1)]; memset(key_bitmask, 0, sizeof(key_bitmask)); ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(key_bitmask)), key_bitmask); uint8_t abs_bitmask[sizeof_bit_array(ABS_MAX + 1)]; memset(abs_bitmask, 0, sizeof(abs_bitmask)); ioctl(fd, EVIOCGBIT(EV_ABS, sizeof(abs_bitmask)), abs_bitmask); uint8_t rel_bitmask[sizeof_bit_array(REL_MAX + 1)]; memset(rel_bitmask, 0, sizeof(rel_bitmask)); ioctl(fd, EVIOCGBIT(EV_REL, sizeof(rel_bitmask)), rel_bitmask); uint8_t sw_bitmask[sizeof_bit_array(SW_MAX + 1)]; memset(sw_bitmask, 0, sizeof(sw_bitmask)); ioctl(fd, EVIOCGBIT(EV_SW, sizeof(sw_bitmask)), sw_bitmask); device->keyBitmask = new uint8_t[sizeof(key_bitmask)]; if (device->keyBitmask != NULL) { memcpy(device->keyBitmask, key_bitmask, sizeof(key_bitmask)); } else { delete device; LOGE("out of memory allocating key bitmask"); return -1; } device->relBitmask = new uint8_t[sizeof(rel_bitmask)]; if (device->relBitmask != NULL) { memcpy(device->relBitmask, rel_bitmask, sizeof(rel_bitmask)); } else { delete device; LOGE("out of memory allocating rel bitmask"); return -1; } // See if this is a keyboard. Ignore everything in the button range except for // joystick and gamepad buttons which are handled like keyboards for the most part. bool haveKeyboardKeys = containsNonZeroByte(key_bitmask, 0, sizeof_bit_array(BTN_MISC)) || containsNonZeroByte(key_bitmask, sizeof_bit_array(KEY_OK), sizeof_bit_array(KEY_MAX + 1)); bool haveGamepadButtons =containsNonZeroByte(key_bitmask, sizeof_bit_array(BTN_JOYSTICK), sizeof_bit_array(BTN_DIGI)); if (haveKeyboardKeys || haveGamepadButtons) { device->classes |= INPUT_DEVICE_CLASS_KEYBOARD; } // See if this is a cursor device such as a trackball or mouse. if (test_bit(BTN_MOUSE, key_bitmask) && test_bit(REL_X, rel_bitmask) && test_bit(REL_Y, rel_bitmask)) { device->classes |= INPUT_DEVICE_CLASS_CURSOR; } // See if this is a touch pad. // Is this a new modern multi-touch driver? if (test_bit(ABS_MT_POSITION_X, abs_bitmask) && test_bit(ABS_MT_POSITION_Y, abs_bitmask)) { // Some joysticks such as the PS3 controller report axes that conflict // with the ABS_MT range. Try to confirm that the device really is // a touch screen. if (test_bit(BTN_TOUCH, key_bitmask) || !haveGamepadButtons) { device->classes |= INPUT_DEVICE_CLASS_TOUCH | INPUT_DEVICE_CLASS_TOUCH_MT; } // Is this an old style single-touch driver? } else if (test_bit(BTN_TOUCH, key_bitmask) && test_bit(ABS_X, abs_bitmask) && test_bit(ABS_Y, abs_bitmask)) { device->classes |= INPUT_DEVICE_CLASS_TOUCH; } // figure out the switches this device reports bool haveSwitches = false; for (int i=0; iid, i, test_bit(i, sw_bitmask)); if (test_bit(i, sw_bitmask)) { haveSwitches = true; if (mSwitches[i] == 0) { mSwitches[i] = device->id; } } } if (haveSwitches) { device->classes |= INPUT_DEVICE_CLASS_SWITCH; } if ((device->classes & INPUT_DEVICE_CLASS_TOUCH)) { // Load the virtual keys for the touch screen, if any. // We do this now so that we can make sure to load the keymap if necessary. status_t status = loadVirtualKeyMap(device); if (!status) { device->classes |= INPUT_DEVICE_CLASS_KEYBOARD; } } if ((device->classes & INPUT_DEVICE_CLASS_KEYBOARD) != 0) { // Load the keymap for the device. status_t status = loadKeyMap(device); // Set system properties for the keyboard. setKeyboardProperties(device, false); // Register the keyboard as a built-in keyboard if it is eligible. if (!status && mBuiltInKeyboardId == -1 && isEligibleBuiltInKeyboard(device->identifier, device->configuration, &device->keyMap)) { mBuiltInKeyboardId = device->id; setKeyboardProperties(device, true); } // 'Q' key support = cheap test of whether this is an alpha-capable kbd if (hasKeycodeLocked(device, AKEYCODE_Q)) { device->classes |= INPUT_DEVICE_CLASS_ALPHAKEY; } // See if this device has a DPAD. if (hasKeycodeLocked(device, AKEYCODE_DPAD_UP) && hasKeycodeLocked(device, AKEYCODE_DPAD_DOWN) && hasKeycodeLocked(device, AKEYCODE_DPAD_LEFT) && hasKeycodeLocked(device, AKEYCODE_DPAD_RIGHT) && hasKeycodeLocked(device, AKEYCODE_DPAD_CENTER)) { device->classes |= INPUT_DEVICE_CLASS_DPAD; } // See if this device has a gamepad. for (size_t i = 0; i < sizeof(GAMEPAD_KEYCODES)/sizeof(GAMEPAD_KEYCODES[0]); i++) { if (hasKeycodeLocked(device, GAMEPAD_KEYCODES[i])) { device->classes |= INPUT_DEVICE_CLASS_GAMEPAD; break; } } } // See if this device is a joystick. // Ignore touchscreens because they use the same absolute axes for other purposes. // Assumes that joysticks always have buttons and the keymap has been loaded. if (device->classes & INPUT_DEVICE_CLASS_GAMEPAD && !(device->classes & INPUT_DEVICE_CLASS_TOUCH)) { if (containsNonZeroByte(abs_bitmask, 0, sizeof_bit_array(ABS_MAX + 1))) { device->classes |= INPUT_DEVICE_CLASS_JOYSTICK; } } // If the device isn't recognized as something we handle, don't monitor it. if (device->classes == 0) { LOGV("Dropping device: id=%d, path='%s', name='%s'", deviceId, devicePath, device->identifier.name.string()); delete device; return -1; } // Determine whether the device is external or internal. if (isExternalDevice(device)) { device->classes |= INPUT_DEVICE_CLASS_EXTERNAL; } LOGI("New device: id=%d, fd=%d, path='%s', name='%s', classes=0x%x, " "configuration='%s', keyLayout='%s', keyCharacterMap='%s', builtinKeyboard=%s", deviceId, fd, devicePath, device->identifier.name.string(), device->classes, device->configurationFile.string(), device->keyMap.keyLayoutFile.string(), device->keyMap.keyCharacterMapFile.string(), toString(mBuiltInKeyboardId == deviceId)); struct pollfd pollfd; pollfd.fd = fd; pollfd.events = POLLIN; pollfd.revents = 0; mFds.push(pollfd); mDevices.push(device); device->next = mOpeningDevices; mOpeningDevices = device; return 0; } void EventHub::loadConfiguration(Device* device) { device->configurationFile = getInputDeviceConfigurationFilePathByDeviceIdentifier( device->identifier, INPUT_DEVICE_CONFIGURATION_FILE_TYPE_CONFIGURATION); if (device->configurationFile.isEmpty()) { LOGD("No input device configuration file found for device '%s'.", device->identifier.name.string()); } else { status_t status = PropertyMap::load(device->configurationFile, &device->configuration); if (status) { LOGE("Error loading input device configuration file for device '%s'. " "Using default configuration.", device->identifier.name.string()); } } } status_t EventHub::loadVirtualKeyMap(Device* device) { // The virtual key map is supplied by the kernel as a system board property file. String8 path; path.append("/sys/board_properties/virtualkeys."); path.append(device->identifier.name); if (access(path.string(), R_OK)) { return NAME_NOT_FOUND; } return VirtualKeyMap::load(path, &device->virtualKeyMap); } status_t EventHub::loadKeyMap(Device* device) { return device->keyMap.load(device->identifier, device->configuration); } void EventHub::setKeyboardProperties(Device* device, bool builtInKeyboard) { int32_t id = builtInKeyboard ? 0 : device->id; android::setKeyboardProperties(id, device->identifier, device->keyMap.keyLayoutFile, device->keyMap.keyCharacterMapFile); } void EventHub::clearKeyboardProperties(Device* device, bool builtInKeyboard) { int32_t id = builtInKeyboard ? 0 : device->id; android::clearKeyboardProperties(id); } bool EventHub::isExternalDevice(Device* device) { if (device->configuration) { bool value; if (device->configuration->tryGetProperty(String8("device.internal"), value) && value) { return false; } } return device->identifier.bus == BUS_USB || device->identifier.bus == BUS_BLUETOOTH; } bool EventHub::hasKeycodeLocked(Device* device, int keycode) const { if (!device->keyMap.haveKeyLayout() || !device->keyBitmask) { return false; } Vector scanCodes; device->keyMap.keyLayoutMap->findScanCodesForKey(keycode, &scanCodes); const size_t N = scanCodes.size(); for (size_t i=0; i= 0 && sc <= KEY_MAX && test_bit(sc, device->keyBitmask)) { return true; } } return false; } int EventHub::closeDevice(const char *devicePath) { AutoMutex _l(mLock); for (size_t i = FIRST_ACTUAL_DEVICE_INDEX; i < mDevices.size(); i++) { Device* device = mDevices[i]; if (device->path == devicePath) { return closeDeviceAtIndexLocked(i); } } LOGV("Remove device: %s not found, device may already have been removed.", devicePath); return -1; } int EventHub::closeDeviceAtIndexLocked(int index) { Device* device = mDevices[index]; LOGI("Removed device: path=%s name=%s id=%d fd=%d classes=0x%x\n", device->path.string(), device->identifier.name.string(), device->id, device->fd, device->classes); for (int j=0; jid) { mSwitches[j] = 0; } } if (device->id == mBuiltInKeyboardId) { LOGW("built-in keyboard device %s (id=%d) is closing! the apps will not like this", device->path.string(), mBuiltInKeyboardId); mBuiltInKeyboardId = -1; clearKeyboardProperties(device, true); } clearKeyboardProperties(device, false); mFds.removeAt(index); mDevices.removeAt(index); device->close(); device->next = mClosingDevices; mClosingDevices = device; return 0; } int EventHub::readNotify(int nfd) { #ifdef HAVE_INOTIFY int res; char devname[PATH_MAX]; char *filename; char event_buf[512]; int event_size; int event_pos = 0; struct inotify_event *event; LOGV("EventHub::readNotify nfd: %d\n", nfd); res = read(nfd, event_buf, sizeof(event_buf)); if(res < (int)sizeof(*event)) { if(errno == EINTR) return 0; LOGW("could not get event, %s\n", strerror(errno)); return 1; } //printf("got %d bytes of event information\n", res); strcpy(devname, DEVICE_PATH); filename = devname + strlen(devname); *filename++ = '/'; while(res >= (int)sizeof(*event)) { event = (struct inotify_event *)(event_buf + event_pos); //printf("%d: %08x \"%s\"\n", event->wd, event->mask, event->len ? event->name : ""); if(event->len) { strcpy(filename, event->name); if(event->mask & IN_CREATE) { openDevice(devname); } else { closeDevice(devname); } } event_size = sizeof(*event) + event->len; res -= event_size; event_pos += event_size; } #endif return 0; } int EventHub::scanDir(const char *dirname) { char devname[PATH_MAX]; char *filename; DIR *dir; struct dirent *de; dir = opendir(dirname); if(dir == NULL) return -1; strcpy(devname, dirname); filename = devname + strlen(devname); *filename++ = '/'; while((de = readdir(dir))) { if(de->d_name[0] == '.' && (de->d_name[1] == '\0' || (de->d_name[1] == '.' && de->d_name[2] == '\0'))) continue; strcpy(filename, de->d_name); openDevice(devname); } closedir(dir); return 0; } void EventHub::dump(String8& dump) { dump.append("Event Hub State:\n"); { // acquire lock AutoMutex _l(mLock); dump.appendFormat(INDENT "BuiltInKeyboardId: %d\n", mBuiltInKeyboardId); dump.append(INDENT "Devices:\n"); for (size_t i = FIRST_ACTUAL_DEVICE_INDEX; i < mDevices.size(); i++) { const Device* device = mDevices[i]; if (device) { if (mBuiltInKeyboardId == device->id) { dump.appendFormat(INDENT2 "%d: %s (aka device 0 - built-in keyboard)\n", device->id, device->identifier.name.string()); } else { dump.appendFormat(INDENT2 "%d: %s\n", device->id, device->identifier.name.string()); } dump.appendFormat(INDENT3 "Classes: 0x%08x\n", device->classes); dump.appendFormat(INDENT3 "Path: %s\n", device->path.string()); dump.appendFormat(INDENT3 "Location: %s\n", device->identifier.location.string()); dump.appendFormat(INDENT3 "UniqueId: %s\n", device->identifier.uniqueId.string()); dump.appendFormat(INDENT3 "Identifier: bus=0x%04x, vendor=0x%04x, " "product=0x%04x, version=0x%04x\n", device->identifier.bus, device->identifier.vendor, device->identifier.product, device->identifier.version); dump.appendFormat(INDENT3 "KeyLayoutFile: %s\n", device->keyMap.keyLayoutFile.string()); dump.appendFormat(INDENT3 "KeyCharacterMapFile: %s\n", device->keyMap.keyCharacterMapFile.string()); dump.appendFormat(INDENT3 "ConfigurationFile: %s\n", device->configurationFile.string()); } } } // release lock } }; // namespace android