diff options
Diffstat (limited to 'libs/input/EventHub.cpp')
| -rw-r--r-- | libs/input/EventHub.cpp | 1669 |
1 files changed, 0 insertions, 1669 deletions
diff --git a/libs/input/EventHub.cpp b/libs/input/EventHub.cpp deleted file mode 100644 index e2efd17..0000000 --- a/libs/input/EventHub.cpp +++ /dev/null @@ -1,1669 +0,0 @@ -/* - * 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 |