| /* | |
| * 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. | |
| */ | |
| #define LOG_TAG "EventHub" | |
| // #define LOG_NDEBUG 0 | |
| #include "EventHub.h" | |
| #include <hardware_legacy/power.h> | |
| #include <cutils/properties.h> | |
| #include <utils/Log.h> | |
| #include <utils/Timers.h> | |
| #include <utils/threads.h> | |
| #include <utils/Errors.h> | |
| #include <stdlib.h> | |
| #include <stdio.h> | |
| #include <unistd.h> | |
| #include <fcntl.h> | |
| #include <memory.h> | |
| #include <errno.h> | |
| #include <assert.h> | |
| #include <input/KeyLayoutMap.h> | |
| #include <input/KeyCharacterMap.h> | |
| #include <input/VirtualKeyMap.h> | |
| #include <string.h> | |
| #include <stdint.h> | |
| #include <dirent.h> | |
| #include <sys/inotify.h> | |
| #include <sys/epoll.h> | |
| #include <sys/ioctl.h> | |
| #include <sys/limits.h> | |
| #include <sys/sha1.h> | |
| /* 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) | |
| #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"; | |
| } | |
| static String8 sha1(const String8& in) { | |
| SHA1_CTX ctx; | |
| SHA1Init(&ctx); | |
| SHA1Update(&ctx, reinterpret_cast<const u_char*>(in.string()), in.size()); | |
| u_char digest[SHA1_DIGEST_LENGTH]; | |
| SHA1Final(digest, &ctx); | |
| String8 out; | |
| for (size_t i = 0; i < SHA1_DIGEST_LENGTH; i++) { | |
| out.appendFormat("%02x", digest[i]); | |
| } | |
| return out; | |
| } | |
| static void setDescriptor(InputDeviceIdentifier& identifier) { | |
| // Compute a device descriptor that uniquely identifies the device. | |
| // The descriptor is assumed to be a stable identifier. Its value should not | |
| // change between reboots, reconnections, firmware updates or new releases of Android. | |
| // Ideally, we also want the descriptor to be short and relatively opaque. | |
| String8 rawDescriptor; | |
| rawDescriptor.appendFormat(":%04x:%04x:", identifier.vendor, identifier.product); | |
| if (!identifier.uniqueId.isEmpty()) { | |
| rawDescriptor.append("uniqueId:"); | |
| rawDescriptor.append(identifier.uniqueId); | |
| } if (identifier.vendor == 0 && identifier.product == 0) { | |
| // If we don't know the vendor and product id, then the device is probably | |
| // built-in so we need to rely on other information to uniquely identify | |
| // the input device. Usually we try to avoid relying on the device name or | |
| // location but for built-in input device, they are unlikely to ever change. | |
| if (!identifier.name.isEmpty()) { | |
| rawDescriptor.append("name:"); | |
| rawDescriptor.append(identifier.name); | |
| } else if (!identifier.location.isEmpty()) { | |
| rawDescriptor.append("location:"); | |
| rawDescriptor.append(identifier.location); | |
| } | |
| } | |
| identifier.descriptor = sha1(rawDescriptor); | |
| ALOGV("Created descriptor: raw=%s, cooked=%s", rawDescriptor.string(), | |
| identifier.descriptor.string()); | |
| } | |
| // --- Global Functions --- | |
| uint32_t getAbsAxisUsage(int32_t axis, uint32_t deviceClasses) { | |
| // Touch devices get dibs on touch-related axes. | |
| if (deviceClasses & INPUT_DEVICE_CLASS_TOUCH) { | |
| switch (axis) { | |
| case ABS_X: | |
| case ABS_Y: | |
| case ABS_PRESSURE: | |
| case ABS_TOOL_WIDTH: | |
| case ABS_DISTANCE: | |
| case ABS_TILT_X: | |
| case ABS_TILT_Y: | |
| case ABS_MT_SLOT: | |
| case ABS_MT_TOUCH_MAJOR: | |
| case ABS_MT_TOUCH_MINOR: | |
| case ABS_MT_WIDTH_MAJOR: | |
| case ABS_MT_WIDTH_MINOR: | |
| case ABS_MT_ORIENTATION: | |
| case ABS_MT_POSITION_X: | |
| case ABS_MT_POSITION_Y: | |
| case ABS_MT_TOOL_TYPE: | |
| case ABS_MT_BLOB_ID: | |
| case ABS_MT_TRACKING_ID: | |
| case ABS_MT_PRESSURE: | |
| case ABS_MT_DISTANCE: | |
| return INPUT_DEVICE_CLASS_TOUCH; | |
| } | |
| } | |
| // Joystick devices get the rest. | |
| return deviceClasses & INPUT_DEVICE_CLASS_JOYSTICK; | |
| } | |
| // --- 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), configuration(NULL), virtualKeyMap(NULL), | |
| ffEffectPlaying(false), ffEffectId(-1), | |
| timestampOverrideSec(0), timestampOverrideUsec(0) { | |
| memset(keyBitmask, 0, sizeof(keyBitmask)); | |
| memset(absBitmask, 0, sizeof(absBitmask)); | |
| memset(relBitmask, 0, sizeof(relBitmask)); | |
| memset(swBitmask, 0, sizeof(swBitmask)); | |
| memset(ledBitmask, 0, sizeof(ledBitmask)); | |
| memset(ffBitmask, 0, sizeof(ffBitmask)); | |
| memset(propBitmask, 0, sizeof(propBitmask)); | |
| } | |
| EventHub::Device::~Device() { | |
| close(); | |
| delete configuration; | |
| delete virtualKeyMap; | |
| } | |
| void EventHub::Device::close() { | |
| if (fd >= 0) { | |
| ::close(fd); | |
| fd = -1; | |
| } | |
| } | |
| // --- EventHub --- | |
| const uint32_t EventHub::EPOLL_ID_INOTIFY; | |
| const uint32_t EventHub::EPOLL_ID_WAKE; | |
| const int EventHub::EPOLL_SIZE_HINT; | |
| const int EventHub::EPOLL_MAX_EVENTS; | |
| EventHub::EventHub(void) : | |
| mBuiltInKeyboardId(NO_BUILT_IN_KEYBOARD), mNextDeviceId(1), | |
| mOpeningDevices(0), mClosingDevices(0), | |
| mNeedToSendFinishedDeviceScan(false), | |
| mNeedToReopenDevices(false), mNeedToScanDevices(true), | |
| mPendingEventCount(0), mPendingEventIndex(0), mPendingINotify(false) { | |
| acquire_wake_lock(PARTIAL_WAKE_LOCK, WAKE_LOCK_ID); | |
| mEpollFd = epoll_create(EPOLL_SIZE_HINT); | |
| LOG_ALWAYS_FATAL_IF(mEpollFd < 0, "Could not create epoll instance. errno=%d", errno); | |
| mINotifyFd = inotify_init(); | |
| int result = inotify_add_watch(mINotifyFd, DEVICE_PATH, IN_DELETE | IN_CREATE); | |
| LOG_ALWAYS_FATAL_IF(result < 0, "Could not register INotify for %s. errno=%d", | |
| DEVICE_PATH, errno); | |
| struct epoll_event eventItem; | |
| memset(&eventItem, 0, sizeof(eventItem)); | |
| eventItem.events = EPOLLIN; | |
| eventItem.data.u32 = EPOLL_ID_INOTIFY; | |
| result = epoll_ctl(mEpollFd, EPOLL_CTL_ADD, mINotifyFd, &eventItem); | |
| LOG_ALWAYS_FATAL_IF(result != 0, "Could not add INotify to epoll instance. errno=%d", errno); | |
| int wakeFds[2]; | |
| result = pipe(wakeFds); | |
| LOG_ALWAYS_FATAL_IF(result != 0, "Could not create wake pipe. errno=%d", errno); | |
| mWakeReadPipeFd = wakeFds[0]; | |
| mWakeWritePipeFd = wakeFds[1]; | |
| result = fcntl(mWakeReadPipeFd, F_SETFL, O_NONBLOCK); | |
| LOG_ALWAYS_FATAL_IF(result != 0, "Could not make wake read pipe non-blocking. errno=%d", | |
| errno); | |
| result = fcntl(mWakeWritePipeFd, F_SETFL, O_NONBLOCK); | |
| LOG_ALWAYS_FATAL_IF(result != 0, "Could not make wake write pipe non-blocking. errno=%d", | |
| errno); | |
| eventItem.data.u32 = EPOLL_ID_WAKE; | |
| result = epoll_ctl(mEpollFd, EPOLL_CTL_ADD, mWakeReadPipeFd, &eventItem); | |
| LOG_ALWAYS_FATAL_IF(result != 0, "Could not add wake read pipe to epoll instance. errno=%d", | |
| errno); | |
| } | |
| EventHub::~EventHub(void) { | |
| closeAllDevicesLocked(); | |
| while (mClosingDevices) { | |
| Device* device = mClosingDevices; | |
| mClosingDevices = device->next; | |
| delete device; | |
| } | |
| ::close(mEpollFd); | |
| ::close(mINotifyFd); | |
| ::close(mWakeReadPipeFd); | |
| ::close(mWakeWritePipeFd); | |
| release_wake_lock(WAKE_LOCK_ID); | |
| } | |
| InputDeviceIdentifier EventHub::getDeviceIdentifier(int32_t deviceId) const { | |
| AutoMutex _l(mLock); | |
| Device* device = getDeviceLocked(deviceId); | |
| if (device == NULL) return InputDeviceIdentifier(); | |
| return device->identifier; | |
| } | |
| 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(); | |
| if (axis >= 0 && axis <= ABS_MAX) { | |
| AutoMutex _l(mLock); | |
| Device* device = getDeviceLocked(deviceId); | |
| if (device && !device->isVirtual() && test_bit(axis, device->absBitmask)) { | |
| struct input_absinfo info; | |
| if(ioctl(device->fd, EVIOCGABS(axis), &info)) { | |
| ALOGW("Error reading absolute controller %d for device %s fd %d, errno=%d", | |
| axis, device->identifier.name.string(), device->fd, errno); | |
| 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; | |
| outAxisInfo->resolution = info.resolution; | |
| } | |
| return OK; | |
| } | |
| } | |
| return -1; | |
| } | |
| bool EventHub::hasRelativeAxis(int32_t deviceId, int axis) const { | |
| if (axis >= 0 && axis <= REL_MAX) { | |
| AutoMutex _l(mLock); | |
| Device* device = getDeviceLocked(deviceId); | |
| if (device) { | |
| return test_bit(axis, device->relBitmask); | |
| } | |
| } | |
| return false; | |
| } | |
| bool EventHub::hasInputProperty(int32_t deviceId, int property) const { | |
| if (property >= 0 && property <= INPUT_PROP_MAX) { | |
| AutoMutex _l(mLock); | |
| Device* device = getDeviceLocked(deviceId); | |
| if (device) { | |
| return test_bit(property, device->propBitmask); | |
| } | |
| } | |
| 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 && !device->isVirtual() && test_bit(scanCode, device->keyBitmask)) { | |
| uint8_t keyState[sizeof_bit_array(KEY_MAX + 1)]; | |
| memset(keyState, 0, sizeof(keyState)); | |
| if (ioctl(device->fd, EVIOCGKEY(sizeof(keyState)), keyState) >= 0) { | |
| return test_bit(scanCode, keyState) ? 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 && !device->isVirtual() && device->keyMap.haveKeyLayout()) { | |
| Vector<int32_t> scanCodes; | |
| device->keyMap.keyLayoutMap->findScanCodesForKey(keyCode, &scanCodes); | |
| if (scanCodes.size() != 0) { | |
| uint8_t keyState[sizeof_bit_array(KEY_MAX + 1)]; | |
| memset(keyState, 0, sizeof(keyState)); | |
| if (ioctl(device->fd, EVIOCGKEY(sizeof(keyState)), keyState) >= 0) { | |
| for (size_t i = 0; i < scanCodes.size(); i++) { | |
| int32_t sc = scanCodes.itemAt(i); | |
| if (sc >= 0 && sc <= KEY_MAX && test_bit(sc, keyState)) { | |
| 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 && !device->isVirtual() && test_bit(sw, device->swBitmask)) { | |
| uint8_t swState[sizeof_bit_array(SW_MAX + 1)]; | |
| memset(swState, 0, sizeof(swState)); | |
| if (ioctl(device->fd, EVIOCGSW(sizeof(swState)), swState) >= 0) { | |
| return test_bit(sw, swState) ? AKEY_STATE_DOWN : AKEY_STATE_UP; | |
| } | |
| } | |
| } | |
| return AKEY_STATE_UNKNOWN; | |
| } | |
| status_t EventHub::getAbsoluteAxisValue(int32_t deviceId, int32_t axis, int32_t* outValue) const { | |
| *outValue = 0; | |
| if (axis >= 0 && axis <= ABS_MAX) { | |
| AutoMutex _l(mLock); | |
| Device* device = getDeviceLocked(deviceId); | |
| if (device && !device->isVirtual() && test_bit(axis, device->absBitmask)) { | |
| struct input_absinfo info; | |
| if(ioctl(device->fd, EVIOCGABS(axis), &info)) { | |
| ALOGW("Error reading absolute controller %d for device %s fd %d, errno=%d", | |
| axis, device->identifier.name.string(), device->fd, errno); | |
| return -errno; | |
| } | |
| *outValue = info.value; | |
| return OK; | |
| } | |
| } | |
| return -1; | |
| } | |
| 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 && device->keyMap.haveKeyLayout()) { | |
| Vector<int32_t> 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; | |
| } | |
| return false; | |
| } | |
| status_t EventHub::mapKey(int32_t deviceId, int32_t scanCode, int32_t usageCode, | |
| int32_t* outKeycode, uint32_t* outFlags) const { | |
| AutoMutex _l(mLock); | |
| Device* device = getDeviceLocked(deviceId); | |
| if (device) { | |
| // Check the key character map first. | |
| sp<KeyCharacterMap> kcm = device->getKeyCharacterMap(); | |
| if (kcm != NULL) { | |
| if (!kcm->mapKey(scanCode, usageCode, outKeycode)) { | |
| *outFlags = 0; | |
| return NO_ERROR; | |
| } | |
| } | |
| // Check the key layout next. | |
| if (device->keyMap.haveKeyLayout()) { | |
| if (!device->keyMap.keyLayoutMap->mapKey( | |
| scanCode, usageCode, outKeycode, outFlags)) { | |
| return NO_ERROR; | |
| } | |
| } | |
| } | |
| *outKeycode = 0; | |
| *outFlags = 0; | |
| return NAME_NOT_FOUND; | |
| } | |
| status_t EventHub::mapAxis(int32_t deviceId, int32_t scanCode, AxisInfo* outAxisInfo) const { | |
| AutoMutex _l(mLock); | |
| Device* device = getDeviceLocked(deviceId); | |
| if (device && device->keyMap.haveKeyLayout()) { | |
| status_t err = device->keyMap.keyLayoutMap->mapAxis(scanCode, outAxisInfo); | |
| if (err == NO_ERROR) { | |
| return NO_ERROR; | |
| } | |
| } | |
| return NAME_NOT_FOUND; | |
| } | |
| void EventHub::setExcludedDevices(const Vector<String8>& devices) { | |
| AutoMutex _l(mLock); | |
| mExcludedDevices = devices; | |
| } | |
| bool EventHub::hasScanCode(int32_t deviceId, int32_t scanCode) const { | |
| AutoMutex _l(mLock); | |
| Device* device = getDeviceLocked(deviceId); | |
| if (device && scanCode >= 0 && scanCode <= KEY_MAX) { | |
| if (test_bit(scanCode, device->keyBitmask)) { | |
| return true; | |
| } | |
| } | |
| return false; | |
| } | |
| bool EventHub::hasLed(int32_t deviceId, int32_t led) const { | |
| AutoMutex _l(mLock); | |
| Device* device = getDeviceLocked(deviceId); | |
| if (device && led >= 0 && led <= LED_MAX) { | |
| if (test_bit(led, device->ledBitmask)) { | |
| return true; | |
| } | |
| } | |
| return false; | |
| } | |
| void EventHub::setLedState(int32_t deviceId, int32_t led, bool on) { | |
| AutoMutex _l(mLock); | |
| Device* device = getDeviceLocked(deviceId); | |
| if (device && !device->isVirtual() && led >= 0 && led <= LED_MAX) { | |
| 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<VirtualKeyDefinition>& outVirtualKeys) const { | |
| outVirtualKeys.clear(); | |
| AutoMutex _l(mLock); | |
| Device* device = getDeviceLocked(deviceId); | |
| if (device && device->virtualKeyMap) { | |
| outVirtualKeys.appendVector(device->virtualKeyMap->getVirtualKeys()); | |
| } | |
| } | |
| sp<KeyCharacterMap> EventHub::getKeyCharacterMap(int32_t deviceId) const { | |
| AutoMutex _l(mLock); | |
| Device* device = getDeviceLocked(deviceId); | |
| if (device) { | |
| return device->getKeyCharacterMap(); | |
| } | |
| return NULL; | |
| } | |
| bool EventHub::setKeyboardLayoutOverlay(int32_t deviceId, | |
| const sp<KeyCharacterMap>& map) { | |
| AutoMutex _l(mLock); | |
| Device* device = getDeviceLocked(deviceId); | |
| if (device) { | |
| if (map != device->overlayKeyMap) { | |
| device->overlayKeyMap = map; | |
| device->combinedKeyMap = KeyCharacterMap::combine( | |
| device->keyMap.keyCharacterMap, map); | |
| return true; | |
| } | |
| } | |
| return false; | |
| } | |
| void EventHub::vibrate(int32_t deviceId, nsecs_t duration) { | |
| AutoMutex _l(mLock); | |
| Device* device = getDeviceLocked(deviceId); | |
| if (device && !device->isVirtual()) { | |
| ff_effect effect; | |
| memset(&effect, 0, sizeof(effect)); | |
| effect.type = FF_RUMBLE; | |
| effect.id = device->ffEffectId; | |
| effect.u.rumble.strong_magnitude = 0xc000; | |
| effect.u.rumble.weak_magnitude = 0xc000; | |
| effect.replay.length = (duration + 999999LL) / 1000000LL; | |
| effect.replay.delay = 0; | |
| if (ioctl(device->fd, EVIOCSFF, &effect)) { | |
| ALOGW("Could not upload force feedback effect to device %s due to error %d.", | |
| device->identifier.name.string(), errno); | |
| return; | |
| } | |
| device->ffEffectId = effect.id; | |
| struct input_event ev; | |
| ev.time.tv_sec = 0; | |
| ev.time.tv_usec = 0; | |
| ev.type = EV_FF; | |
| ev.code = device->ffEffectId; | |
| ev.value = 1; | |
| if (write(device->fd, &ev, sizeof(ev)) != sizeof(ev)) { | |
| ALOGW("Could not start force feedback effect on device %s due to error %d.", | |
| device->identifier.name.string(), errno); | |
| return; | |
| } | |
| device->ffEffectPlaying = true; | |
| } | |
| } | |
| void EventHub::cancelVibrate(int32_t deviceId) { | |
| AutoMutex _l(mLock); | |
| Device* device = getDeviceLocked(deviceId); | |
| if (device && !device->isVirtual()) { | |
| if (device->ffEffectPlaying) { | |
| device->ffEffectPlaying = false; | |
| struct input_event ev; | |
| ev.time.tv_sec = 0; | |
| ev.time.tv_usec = 0; | |
| ev.type = EV_FF; | |
| ev.code = device->ffEffectId; | |
| ev.value = 0; | |
| if (write(device->fd, &ev, sizeof(ev)) != sizeof(ev)) { | |
| ALOGW("Could not stop force feedback effect on device %s due to error %d.", | |
| device->identifier.name.string(), errno); | |
| return; | |
| } | |
| } | |
| } | |
| } | |
| EventHub::Device* EventHub::getDeviceLocked(int32_t deviceId) const { | |
| if (deviceId == BUILT_IN_KEYBOARD_ID) { | |
| deviceId = mBuiltInKeyboardId; | |
| } | |
| ssize_t index = mDevices.indexOfKey(deviceId); | |
| return index >= 0 ? mDevices.valueAt(index) : NULL; | |
| } | |
| EventHub::Device* EventHub::getDeviceByPathLocked(const char* devicePath) const { | |
| for (size_t i = 0; i < mDevices.size(); i++) { | |
| Device* device = mDevices.valueAt(i); | |
| if (device->path == devicePath) { | |
| return device; | |
| } | |
| } | |
| return NULL; | |
| } | |
| size_t EventHub::getEvents(int timeoutMillis, RawEvent* buffer, size_t bufferSize) { | |
| ALOG_ASSERT(bufferSize >= 1); | |
| AutoMutex _l(mLock); | |
| struct input_event readBuffer[bufferSize]; | |
| RawEvent* event = buffer; | |
| size_t capacity = bufferSize; | |
| bool awoken = false; | |
| for (;;) { | |
| nsecs_t now = systemTime(SYSTEM_TIME_MONOTONIC); | |
| // Reopen input devices if needed. | |
| if (mNeedToReopenDevices) { | |
| mNeedToReopenDevices = false; | |
| ALOGI("Reopening all input devices due to a configuration change."); | |
| closeAllDevicesLocked(); | |
| mNeedToScanDevices = true; | |
| break; // return to the caller before we actually rescan | |
| } | |
| // Report any devices that had last been added/removed. | |
| while (mClosingDevices) { | |
| Device* device = mClosingDevices; | |
| ALOGV("Reporting device closed: id=%d, name=%s\n", | |
| device->id, device->path.string()); | |
| mClosingDevices = device->next; | |
| event->when = now; | |
| event->deviceId = device->id == mBuiltInKeyboardId ? BUILT_IN_KEYBOARD_ID : device->id; | |
| event->type = DEVICE_REMOVED; | |
| event += 1; | |
| delete device; | |
| mNeedToSendFinishedDeviceScan = true; | |
| if (--capacity == 0) { | |
| break; | |
| } | |
| } | |
| if (mNeedToScanDevices) { | |
| mNeedToScanDevices = false; | |
| scanDevicesLocked(); | |
| mNeedToSendFinishedDeviceScan = true; | |
| } | |
| while (mOpeningDevices != NULL) { | |
| Device* device = mOpeningDevices; | |
| ALOGV("Reporting device opened: id=%d, name=%s\n", | |
| device->id, device->path.string()); | |
| mOpeningDevices = device->next; | |
| event->when = now; | |
| event->deviceId = device->id == mBuiltInKeyboardId ? 0 : device->id; | |
| event->type = DEVICE_ADDED; | |
| event += 1; | |
| mNeedToSendFinishedDeviceScan = true; | |
| if (--capacity == 0) { | |
| break; | |
| } | |
| } | |
| if (mNeedToSendFinishedDeviceScan) { | |
| mNeedToSendFinishedDeviceScan = false; | |
| event->when = now; | |
| event->type = FINISHED_DEVICE_SCAN; | |
| event += 1; | |
| if (--capacity == 0) { | |
| break; | |
| } | |
| } | |
| // Grab the next input event. | |
| bool deviceChanged = false; | |
| while (mPendingEventIndex < mPendingEventCount) { | |
| const struct epoll_event& eventItem = mPendingEventItems[mPendingEventIndex++]; | |
| if (eventItem.data.u32 == EPOLL_ID_INOTIFY) { | |
| if (eventItem.events & EPOLLIN) { | |
| mPendingINotify = true; | |
| } else { | |
| ALOGW("Received unexpected epoll event 0x%08x for INotify.", eventItem.events); | |
| } | |
| continue; | |
| } | |
| if (eventItem.data.u32 == EPOLL_ID_WAKE) { | |
| if (eventItem.events & EPOLLIN) { | |
| ALOGV("awoken after wake()"); | |
| awoken = true; | |
| char buffer[16]; | |
| ssize_t nRead; | |
| do { | |
| nRead = read(mWakeReadPipeFd, buffer, sizeof(buffer)); | |
| } while ((nRead == -1 && errno == EINTR) || nRead == sizeof(buffer)); | |
| } else { | |
| ALOGW("Received unexpected epoll event 0x%08x for wake read pipe.", | |
| eventItem.events); | |
| } | |
| continue; | |
| } | |
| ssize_t deviceIndex = mDevices.indexOfKey(eventItem.data.u32); | |
| if (deviceIndex < 0) { | |
| ALOGW("Received unexpected epoll event 0x%08x for unknown device id %d.", | |
| eventItem.events, eventItem.data.u32); | |
| continue; | |
| } | |
| Device* device = mDevices.valueAt(deviceIndex); | |
| if (eventItem.events & EPOLLIN) { | |
| int32_t readSize = read(device->fd, readBuffer, | |
| sizeof(struct input_event) * capacity); | |
| if (readSize == 0 || (readSize < 0 && errno == ENODEV)) { | |
| // Device was removed before INotify noticed. | |
| ALOGW("could not get event, removed? (fd: %d size: %d bufferSize: %d " | |
| "capacity: %d errno: %d)\n", | |
| device->fd, readSize, bufferSize, capacity, errno); | |
| deviceChanged = true; | |
| closeDeviceLocked(device); | |
| } else if (readSize < 0) { | |
| if (errno != EAGAIN && errno != EINTR) { | |
| ALOGW("could not get event (errno=%d)", errno); | |
| } | |
| } else if ((readSize % sizeof(struct input_event)) != 0) { | |
| ALOGE("could not get event (wrong size: %d)", readSize); | |
| } else { | |
| int32_t deviceId = device->id == mBuiltInKeyboardId ? 0 : device->id; | |
| size_t count = size_t(readSize) / sizeof(struct input_event); | |
| for (size_t i = 0; i < count; i++) { | |
| struct input_event& iev = readBuffer[i]; | |
| ALOGV("%s got: time=%d.%06d, type=%d, code=%d, value=%d", | |
| device->path.string(), | |
| (int) iev.time.tv_sec, (int) iev.time.tv_usec, | |
| iev.type, iev.code, iev.value); | |
| // Some input devices may have a better concept of the time | |
| // when an input event was actually generated than the kernel | |
| // which simply timestamps all events on entry to evdev. | |
| // This is a custom Android extension of the input protocol | |
| // mainly intended for use with uinput based device drivers. | |
| if (iev.type == EV_MSC) { | |
| if (iev.code == MSC_ANDROID_TIME_SEC) { | |
| device->timestampOverrideSec = iev.value; | |
| continue; | |
| } else if (iev.code == MSC_ANDROID_TIME_USEC) { | |
| device->timestampOverrideUsec = iev.value; | |
| continue; | |
| } | |
| } | |
| if (device->timestampOverrideSec || device->timestampOverrideUsec) { | |
| iev.time.tv_sec = device->timestampOverrideSec; | |
| iev.time.tv_usec = device->timestampOverrideUsec; | |
| if (iev.type == EV_SYN && iev.code == SYN_REPORT) { | |
| device->timestampOverrideSec = 0; | |
| device->timestampOverrideUsec = 0; | |
| } | |
| ALOGV("applied override time %d.%06d", | |
| int(iev.time.tv_sec), int(iev.time.tv_usec)); | |
| } | |
| #ifdef HAVE_POSIX_CLOCKS | |
| // Use the time specified in the event instead of the current time | |
| // so that downstream code can get more accurate estimates of | |
| // event dispatch latency from the time the event is enqueued onto | |
| // the evdev client buffer. | |
| // | |
| // The event's timestamp fortuitously uses the same monotonic clock | |
| // time base as the rest of Android. The kernel event device driver | |
| // (drivers/input/evdev.c) obtains timestamps using ktime_get_ts(). | |
| // The systemTime(SYSTEM_TIME_MONOTONIC) function we use everywhere | |
| // calls clock_gettime(CLOCK_MONOTONIC) which is implemented as a | |
| // system call that also queries ktime_get_ts(). | |
| event->when = nsecs_t(iev.time.tv_sec) * 1000000000LL | |
| + nsecs_t(iev.time.tv_usec) * 1000LL; | |
| ALOGV("event time %lld, now %lld", event->when, now); | |
| // Bug 7291243: Add a guard in case the kernel generates timestamps | |
| // that appear to be far into the future because they were generated | |
| // using the wrong clock source. | |
| // | |
| // This can happen because when the input device is initially opened | |
| // it has a default clock source of CLOCK_REALTIME. Any input events | |
| // enqueued right after the device is opened will have timestamps | |
| // generated using CLOCK_REALTIME. We later set the clock source | |
| // to CLOCK_MONOTONIC but it is already too late. | |
| // | |
| // Invalid input event timestamps can result in ANRs, crashes and | |
| // and other issues that are hard to track down. We must not let them | |
| // propagate through the system. | |
| // | |
| // Log a warning so that we notice the problem and recover gracefully. | |
| if (event->when >= now + 10 * 1000000000LL) { | |
| // Double-check. Time may have moved on. | |
| nsecs_t time = systemTime(SYSTEM_TIME_MONOTONIC); | |
| if (event->when > time) { | |
| ALOGW("An input event from %s has a timestamp that appears to " | |
| "have been generated using the wrong clock source " | |
| "(expected CLOCK_MONOTONIC): " | |
| "event time %lld, current time %lld, call time %lld. " | |
| "Using current time instead.", | |
| device->path.string(), event->when, time, now); | |
| event->when = time; | |
| } else { | |
| ALOGV("Event time is ok but failed the fast path and required " | |
| "an extra call to systemTime: " | |
| "event time %lld, current time %lld, call time %lld.", | |
| event->when, time, now); | |
| } | |
| } | |
| #else | |
| event->when = now; | |
| #endif | |
| event->deviceId = deviceId; | |
| event->type = iev.type; | |
| event->code = iev.code; | |
| event->value = iev.value; | |
| event += 1; | |
| capacity -= 1; | |
| } | |
| if (capacity == 0) { | |
| // The result buffer is full. Reset the pending event index | |
| // so we will try to read the device again on the next iteration. | |
| mPendingEventIndex -= 1; | |
| break; | |
| } | |
| } | |
| } else if (eventItem.events & EPOLLHUP) { | |
| ALOGI("Removing device %s due to epoll hang-up event.", | |
| device->identifier.name.string()); | |
| deviceChanged = true; | |
| closeDeviceLocked(device); | |
| } else { | |
| ALOGW("Received unexpected epoll event 0x%08x for device %s.", | |
| eventItem.events, device->identifier.name.string()); | |
| } | |
| } | |
| // readNotify() will modify the list of devices so this must be done after | |
| // processing all other events to ensure that we read all remaining events | |
| // before closing the devices. | |
| if (mPendingINotify && mPendingEventIndex >= mPendingEventCount) { | |
| mPendingINotify = false; | |
| readNotifyLocked(); | |
| deviceChanged = true; | |
| } | |
| // Report added or removed devices immediately. | |
| if (deviceChanged) { | |
| continue; | |
| } | |
| // Return now if we have collected any events or if we were explicitly awoken. | |
| if (event != buffer || awoken) { | |
| break; | |
| } | |
| // Poll for events. Mind the wake lock dance! | |
| // We hold a wake lock at all times except during epoll_wait(). 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. | |
| // | |
| // The timeout is advisory only. If the device is asleep, it will not wake just to | |
| // service the timeout. | |
| mPendingEventIndex = 0; | |
| mLock.unlock(); // release lock before poll, must be before release_wake_lock | |
| release_wake_lock(WAKE_LOCK_ID); | |
| int pollResult = epoll_wait(mEpollFd, mPendingEventItems, EPOLL_MAX_EVENTS, timeoutMillis); | |
| acquire_wake_lock(PARTIAL_WAKE_LOCK, WAKE_LOCK_ID); | |
| mLock.lock(); // reacquire lock after poll, must be after acquire_wake_lock | |
| if (pollResult == 0) { | |
| // Timed out. | |
| mPendingEventCount = 0; | |
| break; | |
| } | |
| if (pollResult < 0) { | |
| // An error occurred. | |
| mPendingEventCount = 0; | |
| // Sleep after errors to avoid locking up the system. | |
| // Hopefully the error is transient. | |
| if (errno != EINTR) { | |
| ALOGW("poll failed (errno=%d)\n", errno); | |
| usleep(100000); | |
| } | |
| } else { | |
| // Some events occurred. | |
| mPendingEventCount = size_t(pollResult); | |
| } | |
| } | |
| // All done, return the number of events we read. | |
| return event - buffer; | |
| } | |
| void EventHub::wake() { | |
| ALOGV("wake() called"); | |
| ssize_t nWrite; | |
| do { | |
| nWrite = write(mWakeWritePipeFd, "W", 1); | |
| } while (nWrite == -1 && errno == EINTR); | |
| if (nWrite != 1 && errno != EAGAIN) { | |
| ALOGW("Could not write wake signal, errno=%d", errno); | |
| } | |
| } | |
| void EventHub::scanDevicesLocked() { | |
| status_t res = scanDirLocked(DEVICE_PATH); | |
| if(res < 0) { | |
| ALOGE("scan dir failed for %s\n", DEVICE_PATH); | |
| } | |
| if (mDevices.indexOfKey(VIRTUAL_KEYBOARD_ID) < 0) { | |
| createVirtualKeyboardLocked(); | |
| } | |
| } | |
| // ---------------------------------------------------------------------------- | |
| 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, | |
| }; | |
| status_t EventHub::openDeviceLocked(const char *devicePath) { | |
| char buffer[80]; | |
| ALOGV("Opening device: %s", devicePath); | |
| int fd = open(devicePath, O_RDWR | O_CLOEXEC); | |
| if(fd < 0) { | |
| ALOGE("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 | |
| for (size_t i = 0; i < mExcludedDevices.size(); i++) { | |
| const String8& item = mExcludedDevices.itemAt(i); | |
| if (identifier.name == item) { | |
| ALOGI("ignoring event id %s driver %s\n", devicePath, item.string()); | |
| close(fd); | |
| return -1; | |
| } | |
| } | |
| // Get device driver version. | |
| int driverVersion; | |
| if(ioctl(fd, EVIOCGVERSION, &driverVersion)) { | |
| ALOGE("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)) { | |
| ALOGE("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); | |
| } | |
| // Fill in the descriptor. | |
| setDescriptor(identifier); | |
| // Make file descriptor non-blocking for use with poll(). | |
| if (fcntl(fd, F_SETFL, O_NONBLOCK)) { | |
| ALOGE("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); | |
| ALOGV("add device %d: %s\n", deviceId, devicePath); | |
| ALOGV(" bus: %04x\n" | |
| " vendor %04x\n" | |
| " product %04x\n" | |
| " version %04x\n", | |
| identifier.bus, identifier.vendor, identifier.product, identifier.version); | |
| ALOGV(" name: \"%s\"\n", identifier.name.string()); | |
| ALOGV(" location: \"%s\"\n", identifier.location.string()); | |
| ALOGV(" unique id: \"%s\"\n", identifier.uniqueId.string()); | |
| ALOGV(" descriptor: \"%s\"\n", identifier.descriptor.string()); | |
| ALOGV(" driver: v%d.%d.%d\n", | |
| driverVersion >> 16, (driverVersion >> 8) & 0xff, driverVersion & 0xff); | |
| // Load the configuration file for the device. | |
| loadConfigurationLocked(device); | |
| // Figure out the kinds of events the device reports. | |
| ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(device->keyBitmask)), device->keyBitmask); | |
| ioctl(fd, EVIOCGBIT(EV_ABS, sizeof(device->absBitmask)), device->absBitmask); | |
| ioctl(fd, EVIOCGBIT(EV_REL, sizeof(device->relBitmask)), device->relBitmask); | |
| ioctl(fd, EVIOCGBIT(EV_SW, sizeof(device->swBitmask)), device->swBitmask); | |
| ioctl(fd, EVIOCGBIT(EV_LED, sizeof(device->ledBitmask)), device->ledBitmask); | |
| ioctl(fd, EVIOCGBIT(EV_FF, sizeof(device->ffBitmask)), device->ffBitmask); | |
| ioctl(fd, EVIOCGPROP(sizeof(device->propBitmask)), device->propBitmask); | |
| // 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(device->keyBitmask, 0, sizeof_bit_array(BTN_MISC)) | |
| || containsNonZeroByte(device->keyBitmask, sizeof_bit_array(KEY_OK), | |
| sizeof_bit_array(KEY_MAX + 1)); | |
| bool haveGamepadButtons = containsNonZeroByte(device->keyBitmask, sizeof_bit_array(BTN_MISC), | |
| sizeof_bit_array(BTN_MOUSE)) | |
| || containsNonZeroByte(device->keyBitmask, 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, device->keyBitmask) | |
| && test_bit(REL_X, device->relBitmask) | |
| && test_bit(REL_Y, device->relBitmask)) { | |
| 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, device->absBitmask) | |
| && test_bit(ABS_MT_POSITION_Y, device->absBitmask)) { | |
| // 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, device->keyBitmask) || !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, device->keyBitmask) | |
| && test_bit(ABS_X, device->absBitmask) | |
| && test_bit(ABS_Y, device->absBitmask)) { | |
| device->classes |= INPUT_DEVICE_CLASS_TOUCH; | |
| } | |
| // See if this device is a joystick. | |
| // Assumes that joysticks always have gamepad buttons in order to distinguish them | |
| // from other devices such as accelerometers that also have absolute axes. | |
| if (haveGamepadButtons) { | |
| uint32_t assumedClasses = device->classes | INPUT_DEVICE_CLASS_JOYSTICK; | |
| for (int i = 0; i <= ABS_MAX; i++) { | |
| if (test_bit(i, device->absBitmask) | |
| && (getAbsAxisUsage(i, assumedClasses) & INPUT_DEVICE_CLASS_JOYSTICK)) { | |
| device->classes = assumedClasses; | |
| break; | |
| } | |
| } | |
| } | |
| // Check whether this device has switches. | |
| for (int i = 0; i <= SW_MAX; i++) { | |
| if (test_bit(i, device->swBitmask)) { | |
| device->classes |= INPUT_DEVICE_CLASS_SWITCH; | |
| break; | |
| } | |
| } | |
| // Check whether this device supports the vibrator. | |
| if (test_bit(FF_RUMBLE, device->ffBitmask)) { | |
| device->classes |= INPUT_DEVICE_CLASS_VIBRATOR; | |
| } | |
| // Configure virtual keys. | |
| 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 = loadVirtualKeyMapLocked(device); | |
| if (!status) { | |
| device->classes |= INPUT_DEVICE_CLASS_KEYBOARD; | |
| } | |
| } | |
| // Load the key map. | |
| // We need to do this for joysticks too because the key layout may specify axes. | |
| status_t keyMapStatus = NAME_NOT_FOUND; | |
| if (device->classes & (INPUT_DEVICE_CLASS_KEYBOARD | INPUT_DEVICE_CLASS_JOYSTICK)) { | |
| // Load the keymap for the device. | |
| keyMapStatus = loadKeyMapLocked(device); | |
| } | |
| // Configure the keyboard, gamepad or virtual keyboard. | |
| if (device->classes & INPUT_DEVICE_CLASS_KEYBOARD) { | |
| // Register the keyboard as a built-in keyboard if it is eligible. | |
| if (!keyMapStatus | |
| && mBuiltInKeyboardId == NO_BUILT_IN_KEYBOARD | |
| && isEligibleBuiltInKeyboard(device->identifier, | |
| device->configuration, &device->keyMap)) { | |
| mBuiltInKeyboardId = device->id; | |
| } | |
| // '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; | |
| } | |
| } | |
| // Disable kernel key repeat since we handle it ourselves | |
| unsigned int repeatRate[] = {0,0}; | |
| if (ioctl(fd, EVIOCSREP, repeatRate)) { | |
| ALOGW("Unable to disable kernel key repeat for %s: %s", devicePath, strerror(errno)); | |
| } | |
| } | |
| // If the device isn't recognized as something we handle, don't monitor it. | |
| if (device->classes == 0) { | |
| ALOGV("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 (isExternalDeviceLocked(device)) { | |
| device->classes |= INPUT_DEVICE_CLASS_EXTERNAL; | |
| } | |
| // Register with epoll. | |
| struct epoll_event eventItem; | |
| memset(&eventItem, 0, sizeof(eventItem)); | |
| eventItem.events = EPOLLIN; | |
| eventItem.data.u32 = deviceId; | |
| if (epoll_ctl(mEpollFd, EPOLL_CTL_ADD, fd, &eventItem)) { | |
| ALOGE("Could not add device fd to epoll instance. errno=%d", errno); | |
| delete device; | |
| return -1; | |
| } | |
| // Enable wake-lock behavior on kernels that support it. | |
| // TODO: Only need this for devices that can really wake the system. | |
| bool usingSuspendBlockIoctl = !ioctl(fd, EVIOCSSUSPENDBLOCK, 1); | |
| // Tell the kernel that we want to use the monotonic clock for reporting timestamps | |
| // associated with input events. This is important because the input system | |
| // uses the timestamps extensively and assumes they were recorded using the monotonic | |
| // clock. | |
| // | |
| // In older kernel, before Linux 3.4, there was no way to tell the kernel which | |
| // clock to use to input event timestamps. The standard kernel behavior was to | |
| // record a real time timestamp, which isn't what we want. Android kernels therefore | |
| // contained a patch to the evdev_event() function in drivers/input/evdev.c to | |
| // replace the call to do_gettimeofday() with ktime_get_ts() to cause the monotonic | |
| // clock to be used instead of the real time clock. | |
| // | |
| // As of Linux 3.4, there is a new EVIOCSCLOCKID ioctl to set the desired clock. | |
| // Therefore, we no longer require the Android-specific kernel patch described above | |
| // as long as we make sure to set select the monotonic clock. We do that here. | |
| int clockId = CLOCK_MONOTONIC; | |
| bool usingClockIoctl = !ioctl(fd, EVIOCSCLOCKID, &clockId); | |
| ALOGI("New device: id=%d, fd=%d, path='%s', name='%s', classes=0x%x, " | |
| "configuration='%s', keyLayout='%s', keyCharacterMap='%s', builtinKeyboard=%s, " | |
| "usingSuspendBlockIoctl=%s, usingClockIoctl=%s", | |
| deviceId, fd, devicePath, device->identifier.name.string(), | |
| device->classes, | |
| device->configurationFile.string(), | |
| device->keyMap.keyLayoutFile.string(), | |
| device->keyMap.keyCharacterMapFile.string(), | |
| toString(mBuiltInKeyboardId == deviceId), | |
| toString(usingSuspendBlockIoctl), toString(usingClockIoctl)); | |
| addDeviceLocked(device); | |
| return 0; | |
| } | |
| void EventHub::createVirtualKeyboardLocked() { | |
| InputDeviceIdentifier identifier; | |
| identifier.name = "Virtual"; | |
| identifier.uniqueId = "<virtual>"; | |
| setDescriptor(identifier); | |
| Device* device = new Device(-1, VIRTUAL_KEYBOARD_ID, String8("<virtual>"), identifier); | |
| device->classes = INPUT_DEVICE_CLASS_KEYBOARD | |
| | INPUT_DEVICE_CLASS_ALPHAKEY | |
| | INPUT_DEVICE_CLASS_DPAD | |
| | INPUT_DEVICE_CLASS_VIRTUAL; | |
| loadKeyMapLocked(device); | |
| addDeviceLocked(device); | |
| } | |
| void EventHub::addDeviceLocked(Device* device) { | |
| mDevices.add(device->id, device); | |
| device->next = mOpeningDevices; | |
| mOpeningDevices = device; | |
| } | |
| void EventHub::loadConfigurationLocked(Device* device) { | |
| device->configurationFile = getInputDeviceConfigurationFilePathByDeviceIdentifier( | |
| device->identifier, INPUT_DEVICE_CONFIGURATION_FILE_TYPE_CONFIGURATION); | |
| if (device->configurationFile.isEmpty()) { | |
| ALOGD("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) { | |
| ALOGE("Error loading input device configuration file for device '%s'. " | |
| "Using default configuration.", | |
| device->identifier.name.string()); | |
| } | |
| } | |
| } | |
| status_t EventHub::loadVirtualKeyMapLocked(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::loadKeyMapLocked(Device* device) { | |
| return device->keyMap.load(device->identifier, device->configuration); | |
| } | |
| bool EventHub::isExternalDeviceLocked(Device* device) { | |
| if (device->configuration) { | |
| bool value; | |
| if (device->configuration->tryGetProperty(String8("device.internal"), value)) { | |
| return !value; | |
| } | |
| } | |
| 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<int32_t> scanCodes; | |
| device->keyMap.keyLayoutMap->findScanCodesForKey(keycode, &scanCodes); | |
| const size_t N = scanCodes.size(); | |
| for (size_t i=0; i<N && i<=KEY_MAX; i++) { | |
| int32_t sc = scanCodes.itemAt(i); | |
| if (sc >= 0 && sc <= KEY_MAX && test_bit(sc, device->keyBitmask)) { | |
| return true; | |
| } | |
| } | |
| return false; | |
| } | |
| status_t EventHub::closeDeviceByPathLocked(const char *devicePath) { | |
| Device* device = getDeviceByPathLocked(devicePath); | |
| if (device) { | |
| closeDeviceLocked(device); | |
| return 0; | |
| } | |
| ALOGV("Remove device: %s not found, device may already have been removed.", devicePath); | |
| return -1; | |
| } | |
| void EventHub::closeAllDevicesLocked() { | |
| while (mDevices.size() > 0) { | |
| closeDeviceLocked(mDevices.valueAt(mDevices.size() - 1)); | |
| } | |
| } | |
| void EventHub::closeDeviceLocked(Device* device) { | |
| ALOGI("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); | |
| if (device->id == mBuiltInKeyboardId) { | |
| ALOGW("built-in keyboard device %s (id=%d) is closing! the apps will not like this", | |
| device->path.string(), mBuiltInKeyboardId); | |
| mBuiltInKeyboardId = NO_BUILT_IN_KEYBOARD; | |
| } | |
| if (!device->isVirtual()) { | |
| if (epoll_ctl(mEpollFd, EPOLL_CTL_DEL, device->fd, NULL)) { | |
| ALOGW("Could not remove device fd from epoll instance. errno=%d", errno); | |
| } | |
| } | |
| mDevices.removeItem(device->id); | |
| device->close(); | |
| // Unlink for opening devices list if it is present. | |
| Device* pred = NULL; | |
| bool found = false; | |
| for (Device* entry = mOpeningDevices; entry != NULL; ) { | |
| if (entry == device) { | |
| found = true; | |
| break; | |
| } | |
| pred = entry; | |
| entry = entry->next; | |
| } | |
| if (found) { | |
| // Unlink the device from the opening devices list then delete it. | |
| // We don't need to tell the client that the device was closed because | |
| // it does not even know it was opened in the first place. | |
| ALOGI("Device %s was immediately closed after opening.", device->path.string()); | |
| if (pred) { | |
| pred->next = device->next; | |
| } else { | |
| mOpeningDevices = device->next; | |
| } | |
| delete device; | |
| } else { | |
| // Link into closing devices list. | |
| // The device will be deleted later after we have informed the client. | |
| device->next = mClosingDevices; | |
| mClosingDevices = device; | |
| } | |
| } | |
| status_t EventHub::readNotifyLocked() { | |
| int res; | |
| char devname[PATH_MAX]; | |
| char *filename; | |
| char event_buf[512]; | |
| int event_size; | |
| int event_pos = 0; | |
| struct inotify_event *event; | |
| ALOGV("EventHub::readNotify nfd: %d\n", mINotifyFd); | |
| res = read(mINotifyFd, event_buf, sizeof(event_buf)); | |
| if(res < (int)sizeof(*event)) { | |
| if(errno == EINTR) | |
| return 0; | |
| ALOGW("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) { | |
| openDeviceLocked(devname); | |
| } else { | |
| ALOGI("Removing device '%s' due to inotify event\n", devname); | |
| closeDeviceByPathLocked(devname); | |
| } | |
| } | |
| event_size = sizeof(*event) + event->len; | |
| res -= event_size; | |
| event_pos += event_size; | |
| } | |
| return 0; | |
| } | |
| status_t EventHub::scanDirLocked(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); | |
| openDeviceLocked(devname); | |
| } | |
| closedir(dir); | |
| return 0; | |
| } | |
| void EventHub::requestReopenDevices() { | |
| ALOGV("requestReopenDevices() called"); | |
| AutoMutex _l(mLock); | |
| mNeedToReopenDevices = true; | |
| } | |
| 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 = 0; i < mDevices.size(); i++) { | |
| const Device* device = mDevices.valueAt(i); | |
| 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 "Descriptor: %s\n", device->identifier.descriptor.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()); | |
| dump.appendFormat(INDENT3 "HaveKeyboardLayoutOverlay: %s\n", | |
| toString(device->overlayKeyMap != NULL)); | |
| } | |
| } // release lock | |
| } | |
| void EventHub::monitor() { | |
| // Acquire and release the lock to ensure that the event hub has not deadlocked. | |
| mLock.lock(); | |
| mLock.unlock(); | |
| } | |
| }; // namespace android |