--- /dev/null
- #include <sys/sha1.h>
+/*
+ * 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>
- 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);
++
++#include <openssl/sha.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) {
- for (size_t i = 0; i < SHA1_DIGEST_LENGTH; i++) {
++ SHA_CTX ctx;
++ SHA1_Init(&ctx);
++ SHA1_Update(&ctx, reinterpret_cast<const u_char*>(in.string()), in.size());
++ u_char digest[SHA_DIGEST_LENGTH];
++ SHA1_Final(digest, &ctx);
+
+ String8 out;
++ for (size_t i = 0; i < SHA_DIGEST_LENGTH; i++) {
+ out.appendFormat("%02x", digest[i]);
+ }
+ return out;
+}
+
+static void setDescriptor(InputDeviceIdentifier& identifier) {
+ // Compute a device descriptor that uniquely identifies the device.
+ // The descriptor is assumed to be a stable identifier. Its value should not
+ // change between reboots, reconnections, firmware updates or new releases of Android.
+ // Ideally, we also want the descriptor to be short and relatively opaque.
+ String8 rawDescriptor;
+ rawDescriptor.appendFormat(":%04x:%04x:", identifier.vendor, identifier.product);
+ if (!identifier.uniqueId.isEmpty()) {
+ rawDescriptor.append("uniqueId:");
+ rawDescriptor.append(identifier.uniqueId);
+ } if (identifier.vendor == 0 && identifier.product == 0) {
+ // If we don't know the vendor and product id, then the device is probably
+ // built-in so we need to rely on other information to uniquely identify
+ // the input device. Usually we try to avoid relying on the device name or
+ // location but for built-in input device, they are unlikely to ever change.
+ if (!identifier.name.isEmpty()) {
+ rawDescriptor.append("name:");
+ rawDescriptor.append(identifier.name);
+ } else if (!identifier.location.isEmpty()) {
+ rawDescriptor.append("location:");
+ rawDescriptor.append(identifier.location);
+ }
+ }
+ identifier.descriptor = sha1(rawDescriptor);
+ ALOGV("Created descriptor: raw=%s, cooked=%s", rawDescriptor.string(),
+ identifier.descriptor.string());
+}
+
+// --- Global Functions ---
+
+uint32_t getAbsAxisUsage(int32_t axis, uint32_t deviceClasses) {
+ // Touch devices get dibs on touch-related axes.
+ if (deviceClasses & INPUT_DEVICE_CLASS_TOUCH) {
+ switch (axis) {
+ case ABS_X:
+ case ABS_Y:
+ case ABS_PRESSURE:
+ case ABS_TOOL_WIDTH:
+ case ABS_DISTANCE:
+ case ABS_TILT_X:
+ case ABS_TILT_Y:
+ case ABS_MT_SLOT:
+ case ABS_MT_TOUCH_MAJOR:
+ case ABS_MT_TOUCH_MINOR:
+ case ABS_MT_WIDTH_MAJOR:
+ case ABS_MT_WIDTH_MINOR:
+ case ABS_MT_ORIENTATION:
+ case ABS_MT_POSITION_X:
+ case ABS_MT_POSITION_Y:
+ case ABS_MT_TOOL_TYPE:
+ case ABS_MT_BLOB_ID:
+ case ABS_MT_TRACKING_ID:
+ case ABS_MT_PRESSURE:
+ case ABS_MT_DISTANCE:
+ return INPUT_DEVICE_CLASS_TOUCH;
+ }
+ }
+
+ // Joystick devices get the rest.
+ return deviceClasses & INPUT_DEVICE_CLASS_JOYSTICK;
+}
+
+// --- EventHub::Device ---
+
+EventHub::Device::Device(int fd, int32_t id, const String8& path,
+ const InputDeviceIdentifier& identifier) :
+ next(NULL),
+ fd(fd), id(id), path(path), identifier(identifier),
+ classes(0), configuration(NULL), virtualKeyMap(NULL),
+ ffEffectPlaying(false), ffEffectId(-1), 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);
+}
+
+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: %zu 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,
+};
+
+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_DPAD)
+ && device->classes & INPUT_DEVICE_CLASS_GAMEPAD) {
+ device->controllerNumber = getNextControllerNumberLocked(device);
+ setLedForController(device);
+ }
+
+ // Register with epoll.
+ struct epoll_event eventItem;
+ memset(&eventItem, 0, sizeof(eventItem));
+ eventItem.events = EPOLLIN;
+ eventItem.data.u32 = deviceId;
+ if (epoll_ctl(mEpollFd, EPOLL_CTL_ADD, fd, &eventItem)) {
+ ALOGE("Could not add device fd to epoll instance. errno=%d", errno);
+ delete device;
+ return -1;
+ }
+
+ // Enable wake-lock behavior on kernels that support it.
+ // TODO: Only need this for devices that can really wake the system.
+#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
+ bool usingSuspendBlockIoctl = !ioctl(fd, EVIOCSSUSPENDBLOCK, 1);
+
+ // Tell the kernel that we want to use the monotonic clock for reporting timestamps
+ // associated with input events. This is important because the input system
+ // uses the timestamps extensively and assumes they were recorded using the monotonic
+ // clock.
+ //
+ // In older kernel, before Linux 3.4, there was no way to tell the kernel which
+ // clock to use to input event timestamps. The standard kernel behavior was to
+ // record a real time timestamp, which isn't what we want. Android kernels therefore
+ // contained a patch to the evdev_event() function in drivers/input/evdev.c to
+ // replace the call to do_gettimeofday() with ktime_get_ts() to cause the monotonic
+ // clock to be used instead of the real time clock.
+ //
+ // As of Linux 3.4, there is a new EVIOCSCLOCKID ioctl to set the desired clock.
+ // Therefore, we no longer require the Android-specific kernel patch described above
+ // as long as we make sure to set select the monotonic clock. We do that here.
+ int clockId = CLOCK_MONOTONIC;
+ bool usingClockIoctl = !ioctl(fd, EVIOCSCLOCKID, &clockId);
+
+ ALOGI("New device: id=%d, fd=%d, path='%s', name='%s', classes=0x%x, "
+ "configuration='%s', keyLayout='%s', keyCharacterMap='%s', builtinKeyboard=%s, "
+ "usingSuspendBlockIoctl=%s, usingClockIoctl=%s",
+ deviceId, fd, devicePath, device->identifier.name.string(),
+ device->classes,
+ device->configurationFile.string(),
+ device->keyMap.keyLayoutFile.string(),
+ device->keyMap.keyCharacterMapFile.string(),
+ toString(mBuiltInKeyboardId == deviceId),
+ toString(usingSuspendBlockIoctl), toString(usingClockIoctl));
+
+ addDeviceLocked(device);
+ return 0;
+}
+
+void EventHub::createVirtualKeyboardLocked() {
+ InputDeviceIdentifier identifier;
+ identifier.name = "Virtual";
+ identifier.uniqueId = "<virtual>";
+ 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
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