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Diffstat (limited to 'libs/input/EventHub.cpp')
| -rw-r--r-- | libs/input/EventHub.cpp | 1669 |
1 files changed, 1669 insertions, 0 deletions
diff --git a/libs/input/EventHub.cpp b/libs/input/EventHub.cpp new file mode 100644 index 0000000..e2efd17 --- /dev/null +++ b/libs/input/EventHub.cpp @@ -0,0 +1,1669 @@ +/* + * 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> +#include <sys/utsname.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 getLinuxRelease(int* major, int* minor) { + struct utsname info; + if (uname(&info) || sscanf(info.release, "%d.%d", major, minor) <= 0) { + *major = 0, *minor = 0; + ALOGE("Could not get linux version: %s", strerror(errno)); + } +} + +// --- 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), controllerNumber(0), + 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), mControllerNumbers(), + 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); + + int major, minor; + getLinuxRelease(&major, &minor); + // EPOLLWAKEUP was introduced in kernel 3.5 + mUsingEpollWakeup = major > 3 || (major == 3 && minor >= 5); +} + +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; +} + +int32_t EventHub::getDeviceControllerNumber(int32_t deviceId) const { + AutoMutex _l(mLock); + Device* device = getDeviceLocked(deviceId); + if (device == NULL) return 0; + return device->controllerNumber; +} + +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); + int32_t sc; + if (device && mapLed(device, led, &sc) == NO_ERROR) { + if (test_bit(sc, device->ledBitmask)) { + return true; + } + } + return false; +} + +void EventHub::setLedState(int32_t deviceId, int32_t led, bool on) { + AutoMutex _l(mLock); + Device* device = getDeviceLocked(deviceId); + setLedStateLocked(device, led, on); +} + +void EventHub::setLedStateLocked(Device* device, int32_t led, bool on) { + int32_t sc; + if (device && !device->isVirtual() && mapLed(device, led, &sc) != NAME_NOT_FOUND) { + struct input_event ev; + ev.time.tv_sec = 0; + ev.time.tv_usec = 0; + ev.type = EV_LED; + ev.code = sc; + 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; +} + +static String8 generateDescriptor(InputDeviceIdentifier& identifier) { + String8 rawDescriptor; + rawDescriptor.appendFormat(":%04x:%04x:", identifier.vendor, + identifier.product); + // TODO add handling for USB devices to not uniqueify kbs that show up twice + if (!identifier.uniqueId.isEmpty()) { + rawDescriptor.append("uniqueId:"); + rawDescriptor.append(identifier.uniqueId); + } else if (identifier.nonce != 0) { + rawDescriptor.appendFormat("nonce:%04x", identifier.nonce); + } + + 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); + return rawDescriptor; +} + +void EventHub::assignDescriptorLocked(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. In practice we sometimes get devices that cannot be uniquely + // identified. In this case we enforce uniqueness between connected devices. + // Ideally, we also want the descriptor to be short and relatively opaque. + + identifier.nonce = 0; + String8 rawDescriptor = generateDescriptor(identifier); + if (identifier.uniqueId.isEmpty()) { + // If it didn't have a unique id check for conflicts and enforce + // uniqueness if necessary. + while(getDeviceByDescriptorLocked(identifier.descriptor) != NULL) { + identifier.nonce++; + rawDescriptor = generateDescriptor(identifier); + } + } + ALOGV("Created descriptor: raw=%s, cooked=%s", rawDescriptor.string(), + identifier.descriptor.string()); +} + +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::getDeviceByDescriptorLocked(String8& descriptor) const { + size_t size = mDevices.size(); + for (size_t i = 0; i < size; i++) { + Device* device = mDevices.valueAt(i); + if (descriptor.compare(device->identifier.descriptor) == 0) { + return device; + } + } + return NULL; +} + +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. + assignDescriptorLocked(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; + } + + if (device->classes & (INPUT_DEVICE_CLASS_JOYSTICK | INPUT_DEVICE_CLASS_GAMEPAD)) { + device->controllerNumber = getNextControllerNumberLocked(device); + setLedForController(device); + } + + // Register with epoll. + struct epoll_event eventItem; + memset(&eventItem, 0, sizeof(eventItem)); + eventItem.events = mUsingEpollWakeup ? EPOLLIN : EPOLLIN | EPOLLWAKEUP; + 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; + } + + String8 wakeMechanism("EPOLLWAKEUP"); + if (!mUsingEpollWakeup) { +#ifndef EVIOCSSUSPENDBLOCK + // uapi headers don't include EVIOCSSUSPENDBLOCK, and future kernels + // will use an epoll flag instead, so as long as we want to support + // this feature, we need to be prepared to define the ioctl ourselves. +#define EVIOCSSUSPENDBLOCK _IOW('E', 0x91, int) +#endif + if (ioctl(fd, EVIOCSSUSPENDBLOCK, 1)) { + wakeMechanism = "<none>"; + } else { + wakeMechanism = "EVIOCSSUSPENDBLOCK"; + } + } + + // 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, " + "wakeMechanism=%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), + wakeMechanism.string(), toString(usingClockIoctl)); + + addDeviceLocked(device); + return 0; +} + +void EventHub::createVirtualKeyboardLocked() { + InputDeviceIdentifier identifier; + identifier.name = "Virtual"; + identifier.uniqueId = "<virtual>"; + assignDescriptorLocked(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; +} + +int32_t EventHub::getNextControllerNumberLocked(Device* device) { + if (mControllerNumbers.isFull()) { + ALOGI("Maximum number of controllers reached, assigning controller number 0 to device %s", + device->identifier.name.string()); + return 0; + } + // Since the controller number 0 is reserved for non-controllers, translate all numbers up by + // one + return static_cast<int32_t>(mControllerNumbers.markFirstUnmarkedBit() + 1); +} + +void EventHub::releaseControllerNumberLocked(Device* device) { + int32_t num = device->controllerNumber; + device->controllerNumber= 0; + if (num == 0) { + return; + } + mControllerNumbers.clearBit(static_cast<uint32_t>(num - 1)); +} + +void EventHub::setLedForController(Device* device) { + for (int i = 0; i < MAX_CONTROLLER_LEDS; i++) { + setLedStateLocked(device, ALED_CONTROLLER_1 + i, device->controllerNumber == i + 1); + } +} + +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::mapLed(Device* device, int32_t led, int32_t* outScanCode) const { + if (!device->keyMap.haveKeyLayout() || !device->ledBitmask) { + return NAME_NOT_FOUND; + } + + int32_t scanCode; + if(device->keyMap.keyLayoutMap->findScanCodeForLed(led, &scanCode) != NAME_NOT_FOUND) { + if(scanCode >= 0 && scanCode <= LED_MAX && test_bit(scanCode, device->ledBitmask)) { + *outScanCode = scanCode; + return NO_ERROR; + } + } + return NAME_NOT_FOUND; +} + +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); + } + } + + releaseControllerNumberLocked(device); + + 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 "ControllerNumber: %d\n", device->controllerNumber); + 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 |