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* Copyright (C) 2005 The Android Open Source Project
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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#define LOG_TAG "EventHub"
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// #define LOG_NDEBUG 0
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#include <hardware_legacy/power.h>
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#include <cutils/properties.h>
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#include <utils/Log.h>
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#include <utils/Timers.h>
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#include <utils/threads.h>
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#include <utils/Errors.h>
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#include <androidfw/KeyLayoutMap.h>
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#include <androidfw/KeyCharacterMap.h>
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#include <androidfw/VirtualKeyMap.h>
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#include <sys/inotify.h>
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#include <sys/epoll.h>
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#include <sys/ioctl.h>
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#include <sys/limits.h>
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/* this macro is used to tell if "bit" is set in "array"
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* it selects a byte from the array, and does a boolean AND
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* operation with a byte that only has the relevant bit set.
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* eg. to check for the 12th bit, we do (array[1] & 1<<4)
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#define test_bit(bit, array) (array[bit/8] & (1<<(bit%8)))
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/* this macro computes the number of bytes needed to represent a bit array of the specified size */
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#define sizeof_bit_array(bits) ((bits + 7) / 8)
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static const char *WAKE_LOCK_ID = "KeyEvents";
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static const char *DEVICE_PATH = "/dev/input";
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/* return the larger integer */
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static inline int max(int v1, int v2)
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return (v1 > v2) ? v1 : v2;
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static inline const char* toString(bool value) {
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return value ? "true" : "false";
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static String8 sha1(const String8& in) {
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SHA1Update(&ctx, reinterpret_cast<const u_char*>(in.string()), in.size());
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u_char digest[SHA1_DIGEST_LENGTH];
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SHA1Final(digest, &ctx);
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for (size_t i = 0; i < SHA1_DIGEST_LENGTH; i++) {
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out.appendFormat("%02x", digest[i]);
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static void setDescriptor(InputDeviceIdentifier& identifier) {
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// Compute a device descriptor that uniquely identifies the device.
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// The descriptor is assumed to be a stable identifier. Its value should not
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// change between reboots, reconnections, firmware updates or new releases of Android.
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// Ideally, we also want the descriptor to be short and relatively opaque.
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String8 rawDescriptor;
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rawDescriptor.appendFormat(":%04x:%04x:", identifier.vendor, identifier.product);
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if (!identifier.uniqueId.isEmpty()) {
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rawDescriptor.append("uniqueId:");
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rawDescriptor.append(identifier.uniqueId);
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} if (identifier.vendor == 0 && identifier.product == 0) {
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// If we don't know the vendor and product id, then the device is probably
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// built-in so we need to rely on other information to uniquely identify
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// the input device. Usually we try to avoid relying on the device name or
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// location but for built-in input device, they are unlikely to ever change.
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if (!identifier.name.isEmpty()) {
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rawDescriptor.append("name:");
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rawDescriptor.append(identifier.name);
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} else if (!identifier.location.isEmpty()) {
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rawDescriptor.append("location:");
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rawDescriptor.append(identifier.location);
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identifier.descriptor = sha1(rawDescriptor);
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ALOGV("Created descriptor: raw=%s, cooked=%s", rawDescriptor.string(),
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identifier.descriptor.string());
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// --- Global Functions ---
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uint32_t getAbsAxisUsage(int32_t axis, uint32_t deviceClasses) {
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// Touch devices get dibs on touch-related axes.
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if (deviceClasses & INPUT_DEVICE_CLASS_TOUCH) {
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case ABS_MT_TOUCH_MAJOR:
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case ABS_MT_TOUCH_MINOR:
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case ABS_MT_WIDTH_MAJOR:
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case ABS_MT_WIDTH_MINOR:
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case ABS_MT_ORIENTATION:
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case ABS_MT_POSITION_X:
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case ABS_MT_POSITION_Y:
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case ABS_MT_TOOL_TYPE:
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case ABS_MT_TRACKING_ID:
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case ABS_MT_PRESSURE:
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case ABS_MT_DISTANCE:
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return INPUT_DEVICE_CLASS_TOUCH;
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// Joystick devices get the rest.
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return deviceClasses & INPUT_DEVICE_CLASS_JOYSTICK;
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// --- EventHub::Device ---
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EventHub::Device::Device(int fd, int32_t id, const String8& path,
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const InputDeviceIdentifier& identifier) :
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fd(fd), id(id), path(path), identifier(identifier),
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classes(0), configuration(NULL), virtualKeyMap(NULL),
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ffEffectPlaying(false), ffEffectId(-1) {
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memset(keyBitmask, 0, sizeof(keyBitmask));
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memset(absBitmask, 0, sizeof(absBitmask));
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memset(relBitmask, 0, sizeof(relBitmask));
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memset(swBitmask, 0, sizeof(swBitmask));
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memset(ledBitmask, 0, sizeof(ledBitmask));
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memset(ffBitmask, 0, sizeof(ffBitmask));
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memset(propBitmask, 0, sizeof(propBitmask));
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EventHub::Device::~Device() {
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delete configuration;
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delete virtualKeyMap;
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void EventHub::Device::close() {
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const uint32_t EventHub::EPOLL_ID_INOTIFY;
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const uint32_t EventHub::EPOLL_ID_WAKE;
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const int EventHub::EPOLL_SIZE_HINT;
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const int EventHub::EPOLL_MAX_EVENTS;
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EventHub::EventHub(void) :
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mBuiltInKeyboardId(NO_BUILT_IN_KEYBOARD), mNextDeviceId(1),
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mOpeningDevices(0), mClosingDevices(0),
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mNeedToSendFinishedDeviceScan(false),
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mNeedToReopenDevices(false), mNeedToScanDevices(true),
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mPendingEventCount(0), mPendingEventIndex(0), mPendingINotify(false) {
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acquire_wake_lock(PARTIAL_WAKE_LOCK, WAKE_LOCK_ID);
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mEpollFd = epoll_create(EPOLL_SIZE_HINT);
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LOG_ALWAYS_FATAL_IF(mEpollFd < 0, "Could not create epoll instance. errno=%d", errno);
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mINotifyFd = inotify_init();
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int result = inotify_add_watch(mINotifyFd, DEVICE_PATH, IN_DELETE | IN_CREATE);
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LOG_ALWAYS_FATAL_IF(result < 0, "Could not register INotify for %s. errno=%d",
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struct epoll_event eventItem;
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memset(&eventItem, 0, sizeof(eventItem));
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eventItem.events = EPOLLIN;
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eventItem.data.u32 = EPOLL_ID_INOTIFY;
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result = epoll_ctl(mEpollFd, EPOLL_CTL_ADD, mINotifyFd, &eventItem);
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LOG_ALWAYS_FATAL_IF(result != 0, "Could not add INotify to epoll instance. errno=%d", errno);
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result = pipe(wakeFds);
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LOG_ALWAYS_FATAL_IF(result != 0, "Could not create wake pipe. errno=%d", errno);
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mWakeReadPipeFd = wakeFds[0];
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mWakeWritePipeFd = wakeFds[1];
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result = fcntl(mWakeReadPipeFd, F_SETFL, O_NONBLOCK);
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LOG_ALWAYS_FATAL_IF(result != 0, "Could not make wake read pipe non-blocking. errno=%d",
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result = fcntl(mWakeWritePipeFd, F_SETFL, O_NONBLOCK);
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LOG_ALWAYS_FATAL_IF(result != 0, "Could not make wake write pipe non-blocking. errno=%d",
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eventItem.data.u32 = EPOLL_ID_WAKE;
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result = epoll_ctl(mEpollFd, EPOLL_CTL_ADD, mWakeReadPipeFd, &eventItem);
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LOG_ALWAYS_FATAL_IF(result != 0, "Could not add wake read pipe to epoll instance. errno=%d",
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EventHub::~EventHub(void) {
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closeAllDevicesLocked();
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while (mClosingDevices) {
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Device* device = mClosingDevices;
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mClosingDevices = device->next;
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::close(mWakeReadPipeFd);
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::close(mWakeWritePipeFd);
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release_wake_lock(WAKE_LOCK_ID);
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InputDeviceIdentifier EventHub::getDeviceIdentifier(int32_t deviceId) const {
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Device* device = getDeviceLocked(deviceId);
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if (device == NULL) return InputDeviceIdentifier();
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return device->identifier;
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uint32_t EventHub::getDeviceClasses(int32_t deviceId) const {
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Device* device = getDeviceLocked(deviceId);
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if (device == NULL) return 0;
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return device->classes;
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void EventHub::getConfiguration(int32_t deviceId, PropertyMap* outConfiguration) const {
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Device* device = getDeviceLocked(deviceId);
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if (device && device->configuration) {
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*outConfiguration = *device->configuration;
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outConfiguration->clear();
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status_t EventHub::getAbsoluteAxisInfo(int32_t deviceId, int axis,
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RawAbsoluteAxisInfo* outAxisInfo) const {
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outAxisInfo->clear();
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if (axis >= 0 && axis <= ABS_MAX) {
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Device* device = getDeviceLocked(deviceId);
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if (device && !device->isVirtual() && test_bit(axis, device->absBitmask)) {
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struct input_absinfo info;
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if(ioctl(device->fd, EVIOCGABS(axis), &info)) {
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ALOGW("Error reading absolute controller %d for device %s fd %d, errno=%d",
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axis, device->identifier.name.string(), device->fd, errno);
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if (info.minimum != info.maximum) {
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outAxisInfo->valid = true;
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outAxisInfo->minValue = info.minimum;
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outAxisInfo->maxValue = info.maximum;
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outAxisInfo->flat = info.flat;
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outAxisInfo->fuzz = info.fuzz;
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outAxisInfo->resolution = info.resolution;
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bool EventHub::hasRelativeAxis(int32_t deviceId, int axis) const {
312
if (axis >= 0 && axis <= REL_MAX) {
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Device* device = getDeviceLocked(deviceId);
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return test_bit(axis, device->relBitmask);
323
bool EventHub::hasInputProperty(int32_t deviceId, int property) const {
324
if (property >= 0 && property <= INPUT_PROP_MAX) {
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Device* device = getDeviceLocked(deviceId);
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return test_bit(property, device->propBitmask);
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int32_t EventHub::getScanCodeState(int32_t deviceId, int32_t scanCode) const {
336
if (scanCode >= 0 && scanCode <= KEY_MAX) {
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Device* device = getDeviceLocked(deviceId);
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if (device && !device->isVirtual() && test_bit(scanCode, device->keyBitmask)) {
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uint8_t keyState[sizeof_bit_array(KEY_MAX + 1)];
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memset(keyState, 0, sizeof(keyState));
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if (ioctl(device->fd, EVIOCGKEY(sizeof(keyState)), keyState) >= 0) {
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return test_bit(scanCode, keyState) ? AKEY_STATE_DOWN : AKEY_STATE_UP;
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return AKEY_STATE_UNKNOWN;
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int32_t EventHub::getKeyCodeState(int32_t deviceId, int32_t keyCode) const {
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Device* device = getDeviceLocked(deviceId);
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if (device && !device->isVirtual() && device->keyMap.haveKeyLayout()) {
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Vector<int32_t> scanCodes;
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device->keyMap.keyLayoutMap->findScanCodesForKey(keyCode, &scanCodes);
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if (scanCodes.size() != 0) {
359
uint8_t keyState[sizeof_bit_array(KEY_MAX + 1)];
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memset(keyState, 0, sizeof(keyState));
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if (ioctl(device->fd, EVIOCGKEY(sizeof(keyState)), keyState) >= 0) {
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for (size_t i = 0; i < scanCodes.size(); i++) {
363
int32_t sc = scanCodes.itemAt(i);
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if (sc >= 0 && sc <= KEY_MAX && test_bit(sc, keyState)) {
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return AKEY_STATE_DOWN;
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return AKEY_STATE_UP;
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return AKEY_STATE_UNKNOWN;
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int32_t EventHub::getSwitchState(int32_t deviceId, int32_t sw) const {
376
if (sw >= 0 && sw <= SW_MAX) {
379
Device* device = getDeviceLocked(deviceId);
380
if (device && !device->isVirtual() && test_bit(sw, device->swBitmask)) {
381
uint8_t swState[sizeof_bit_array(SW_MAX + 1)];
382
memset(swState, 0, sizeof(swState));
383
if (ioctl(device->fd, EVIOCGSW(sizeof(swState)), swState) >= 0) {
384
return test_bit(sw, swState) ? AKEY_STATE_DOWN : AKEY_STATE_UP;
388
return AKEY_STATE_UNKNOWN;
391
status_t EventHub::getAbsoluteAxisValue(int32_t deviceId, int32_t axis, int32_t* outValue) const {
394
if (axis >= 0 && axis <= ABS_MAX) {
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Device* device = getDeviceLocked(deviceId);
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if (device && !device->isVirtual() && test_bit(axis, device->absBitmask)) {
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struct input_absinfo info;
400
if(ioctl(device->fd, EVIOCGABS(axis), &info)) {
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ALOGW("Error reading absolute controller %d for device %s fd %d, errno=%d",
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axis, device->identifier.name.string(), device->fd, errno);
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*outValue = info.value;
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bool EventHub::markSupportedKeyCodes(int32_t deviceId, size_t numCodes,
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const int32_t* keyCodes, uint8_t* outFlags) const {
417
Device* device = getDeviceLocked(deviceId);
418
if (device && device->keyMap.haveKeyLayout()) {
419
Vector<int32_t> scanCodes;
420
for (size_t codeIndex = 0; codeIndex < numCodes; codeIndex++) {
423
status_t err = device->keyMap.keyLayoutMap->findScanCodesForKey(
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keyCodes[codeIndex], &scanCodes);
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// check the possible scan codes identified by the layout map against the
427
// map of codes actually emitted by the driver
428
for (size_t sc = 0; sc < scanCodes.size(); sc++) {
429
if (test_bit(scanCodes[sc], device->keyBitmask)) {
430
outFlags[codeIndex] = 1;
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status_t EventHub::mapKey(int32_t deviceId, int32_t scanCode, int32_t usageCode,
442
int32_t* outKeycode, uint32_t* outFlags) const {
444
Device* device = getDeviceLocked(deviceId);
447
// Check the key character map first.
448
sp<KeyCharacterMap> kcm = device->getKeyCharacterMap();
450
if (!kcm->mapKey(scanCode, usageCode, outKeycode)) {
456
// Check the key layout next.
457
if (device->keyMap.haveKeyLayout()) {
458
if (!device->keyMap.keyLayoutMap->mapKey(
459
scanCode, usageCode, outKeycode, outFlags)) {
467
return NAME_NOT_FOUND;
470
status_t EventHub::mapAxis(int32_t deviceId, int32_t scanCode, AxisInfo* outAxisInfo) const {
472
Device* device = getDeviceLocked(deviceId);
474
if (device && device->keyMap.haveKeyLayout()) {
475
status_t err = device->keyMap.keyLayoutMap->mapAxis(scanCode, outAxisInfo);
476
if (err == NO_ERROR) {
481
return NAME_NOT_FOUND;
484
void EventHub::setExcludedDevices(const Vector<String8>& devices) {
487
mExcludedDevices = devices;
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bool EventHub::hasScanCode(int32_t deviceId, int32_t scanCode) const {
492
Device* device = getDeviceLocked(deviceId);
493
if (device && scanCode >= 0 && scanCode <= KEY_MAX) {
494
if (test_bit(scanCode, device->keyBitmask)) {
501
bool EventHub::hasLed(int32_t deviceId, int32_t led) const {
503
Device* device = getDeviceLocked(deviceId);
504
if (device && led >= 0 && led <= LED_MAX) {
505
if (test_bit(led, device->ledBitmask)) {
512
void EventHub::setLedState(int32_t deviceId, int32_t led, bool on) {
514
Device* device = getDeviceLocked(deviceId);
515
if (device && !device->isVirtual() && led >= 0 && led <= LED_MAX) {
516
struct input_event ev;
521
ev.value = on ? 1 : 0;
525
nWrite = write(device->fd, &ev, sizeof(struct input_event));
526
} while (nWrite == -1 && errno == EINTR);
530
void EventHub::getVirtualKeyDefinitions(int32_t deviceId,
531
Vector<VirtualKeyDefinition>& outVirtualKeys) const {
532
outVirtualKeys.clear();
535
Device* device = getDeviceLocked(deviceId);
536
if (device && device->virtualKeyMap) {
537
outVirtualKeys.appendVector(device->virtualKeyMap->getVirtualKeys());
541
sp<KeyCharacterMap> EventHub::getKeyCharacterMap(int32_t deviceId) const {
543
Device* device = getDeviceLocked(deviceId);
545
return device->getKeyCharacterMap();
550
bool EventHub::setKeyboardLayoutOverlay(int32_t deviceId,
551
const sp<KeyCharacterMap>& map) {
553
Device* device = getDeviceLocked(deviceId);
555
if (map != device->overlayKeyMap) {
556
device->overlayKeyMap = map;
557
device->combinedKeyMap = KeyCharacterMap::combine(
558
device->keyMap.keyCharacterMap, map);
565
void EventHub::vibrate(int32_t deviceId, nsecs_t duration) {
567
Device* device = getDeviceLocked(deviceId);
568
if (device && !device->isVirtual()) {
570
memset(&effect, 0, sizeof(effect));
571
effect.type = FF_RUMBLE;
572
effect.id = device->ffEffectId;
573
effect.u.rumble.strong_magnitude = 0xc000;
574
effect.u.rumble.weak_magnitude = 0xc000;
575
effect.replay.length = (duration + 999999LL) / 1000000LL;
576
effect.replay.delay = 0;
577
if (ioctl(device->fd, EVIOCSFF, &effect)) {
578
ALOGW("Could not upload force feedback effect to device %s due to error %d.",
579
device->identifier.name.string(), errno);
582
device->ffEffectId = effect.id;
584
struct input_event ev;
588
ev.code = device->ffEffectId;
590
if (write(device->fd, &ev, sizeof(ev)) != sizeof(ev)) {
591
ALOGW("Could not start force feedback effect on device %s due to error %d.",
592
device->identifier.name.string(), errno);
595
device->ffEffectPlaying = true;
599
void EventHub::cancelVibrate(int32_t deviceId) {
601
Device* device = getDeviceLocked(deviceId);
602
if (device && !device->isVirtual()) {
603
if (device->ffEffectPlaying) {
604
device->ffEffectPlaying = false;
606
struct input_event ev;
610
ev.code = device->ffEffectId;
612
if (write(device->fd, &ev, sizeof(ev)) != sizeof(ev)) {
613
ALOGW("Could not stop force feedback effect on device %s due to error %d.",
614
device->identifier.name.string(), errno);
621
EventHub::Device* EventHub::getDeviceLocked(int32_t deviceId) const {
622
if (deviceId == BUILT_IN_KEYBOARD_ID) {
623
deviceId = mBuiltInKeyboardId;
625
ssize_t index = mDevices.indexOfKey(deviceId);
626
return index >= 0 ? mDevices.valueAt(index) : NULL;
629
EventHub::Device* EventHub::getDeviceByPathLocked(const char* devicePath) const {
630
for (size_t i = 0; i < mDevices.size(); i++) {
631
Device* device = mDevices.valueAt(i);
632
if (device->path == devicePath) {
639
size_t EventHub::getEvents(int timeoutMillis, RawEvent* buffer, size_t bufferSize) {
640
ALOG_ASSERT(bufferSize >= 1);
644
struct input_event readBuffer[bufferSize];
646
RawEvent* event = buffer;
647
size_t capacity = bufferSize;
650
nsecs_t now = systemTime(SYSTEM_TIME_MONOTONIC);
652
// Reopen input devices if needed.
653
if (mNeedToReopenDevices) {
654
mNeedToReopenDevices = false;
656
ALOGI("Reopening all input devices due to a configuration change.");
658
closeAllDevicesLocked();
659
mNeedToScanDevices = true;
660
break; // return to the caller before we actually rescan
663
// Report any devices that had last been added/removed.
664
while (mClosingDevices) {
665
Device* device = mClosingDevices;
666
ALOGV("Reporting device closed: id=%d, name=%s\n",
667
device->id, device->path.string());
668
mClosingDevices = device->next;
670
event->deviceId = device->id == mBuiltInKeyboardId ? BUILT_IN_KEYBOARD_ID : device->id;
671
event->type = DEVICE_REMOVED;
674
mNeedToSendFinishedDeviceScan = true;
675
if (--capacity == 0) {
680
if (mNeedToScanDevices) {
681
mNeedToScanDevices = false;
683
mNeedToSendFinishedDeviceScan = true;
686
while (mOpeningDevices != NULL) {
687
Device* device = mOpeningDevices;
688
ALOGV("Reporting device opened: id=%d, name=%s\n",
689
device->id, device->path.string());
690
mOpeningDevices = device->next;
692
event->deviceId = device->id == mBuiltInKeyboardId ? 0 : device->id;
693
event->type = DEVICE_ADDED;
695
mNeedToSendFinishedDeviceScan = true;
696
if (--capacity == 0) {
701
if (mNeedToSendFinishedDeviceScan) {
702
mNeedToSendFinishedDeviceScan = false;
704
event->type = FINISHED_DEVICE_SCAN;
706
if (--capacity == 0) {
711
// Grab the next input event.
712
bool deviceChanged = false;
713
while (mPendingEventIndex < mPendingEventCount) {
714
const struct epoll_event& eventItem = mPendingEventItems[mPendingEventIndex++];
715
if (eventItem.data.u32 == EPOLL_ID_INOTIFY) {
716
if (eventItem.events & EPOLLIN) {
717
mPendingINotify = true;
719
ALOGW("Received unexpected epoll event 0x%08x for INotify.", eventItem.events);
724
if (eventItem.data.u32 == EPOLL_ID_WAKE) {
725
if (eventItem.events & EPOLLIN) {
726
ALOGV("awoken after wake()");
731
nRead = read(mWakeReadPipeFd, buffer, sizeof(buffer));
732
} while ((nRead == -1 && errno == EINTR) || nRead == sizeof(buffer));
734
ALOGW("Received unexpected epoll event 0x%08x for wake read pipe.",
740
ssize_t deviceIndex = mDevices.indexOfKey(eventItem.data.u32);
741
if (deviceIndex < 0) {
742
ALOGW("Received unexpected epoll event 0x%08x for unknown device id %d.",
743
eventItem.events, eventItem.data.u32);
747
Device* device = mDevices.valueAt(deviceIndex);
748
if (eventItem.events & EPOLLIN) {
749
int32_t readSize = read(device->fd, readBuffer,
750
sizeof(struct input_event) * capacity);
751
if (readSize == 0 || (readSize < 0 && errno == ENODEV)) {
752
// Device was removed before INotify noticed.
753
ALOGW("could not get event, removed? (fd: %d size: %d bufferSize: %d "
754
"capacity: %d errno: %d)\n",
755
device->fd, readSize, bufferSize, capacity, errno);
756
deviceChanged = true;
757
closeDeviceLocked(device);
758
} else if (readSize < 0) {
759
if (errno != EAGAIN && errno != EINTR) {
760
ALOGW("could not get event (errno=%d)", errno);
762
} else if ((readSize % sizeof(struct input_event)) != 0) {
763
ALOGE("could not get event (wrong size: %d)", readSize);
765
int32_t deviceId = device->id == mBuiltInKeyboardId ? 0 : device->id;
767
size_t count = size_t(readSize) / sizeof(struct input_event);
768
for (size_t i = 0; i < count; i++) {
769
const struct input_event& iev = readBuffer[i];
770
ALOGV("%s got: t0=%d, t1=%d, type=%d, code=%d, value=%d",
771
device->path.string(),
772
(int) iev.time.tv_sec, (int) iev.time.tv_usec,
773
iev.type, iev.code, iev.value);
775
#ifdef HAVE_POSIX_CLOCKS
776
// Use the time specified in the event instead of the current time
777
// so that downstream code can get more accurate estimates of
778
// event dispatch latency from the time the event is enqueued onto
779
// the evdev client buffer.
781
// The event's timestamp fortuitously uses the same monotonic clock
782
// time base as the rest of Android. The kernel event device driver
783
// (drivers/input/evdev.c) obtains timestamps using ktime_get_ts().
784
// The systemTime(SYSTEM_TIME_MONOTONIC) function we use everywhere
785
// calls clock_gettime(CLOCK_MONOTONIC) which is implemented as a
786
// system call that also queries ktime_get_ts().
787
event->when = nsecs_t(iev.time.tv_sec) * 1000000000LL
788
+ nsecs_t(iev.time.tv_usec) * 1000LL;
789
ALOGV("event time %lld, now %lld", event->when, now);
793
event->deviceId = deviceId;
794
event->type = iev.type;
795
event->code = iev.code;
796
event->value = iev.value;
801
// The result buffer is full. Reset the pending event index
802
// so we will try to read the device again on the next iteration.
803
mPendingEventIndex -= 1;
807
} else if (eventItem.events & EPOLLHUP) {
808
ALOGI("Removing device %s due to epoll hang-up event.",
809
device->identifier.name.string());
810
deviceChanged = true;
811
closeDeviceLocked(device);
813
ALOGW("Received unexpected epoll event 0x%08x for device %s.",
814
eventItem.events, device->identifier.name.string());
818
// readNotify() will modify the list of devices so this must be done after
819
// processing all other events to ensure that we read all remaining events
820
// before closing the devices.
821
if (mPendingINotify && mPendingEventIndex >= mPendingEventCount) {
822
mPendingINotify = false;
824
deviceChanged = true;
827
// Report added or removed devices immediately.
832
// Return now if we have collected any events or if we were explicitly awoken.
833
if (event != buffer || awoken) {
837
// Poll for events. Mind the wake lock dance!
838
// We hold a wake lock at all times except during epoll_wait(). This works due to some
839
// subtle choreography. When a device driver has pending (unread) events, it acquires
840
// a kernel wake lock. However, once the last pending event has been read, the device
841
// driver will release the kernel wake lock. To prevent the system from going to sleep
842
// when this happens, the EventHub holds onto its own user wake lock while the client
843
// is processing events. Thus the system can only sleep if there are no events
844
// pending or currently being processed.
846
// The timeout is advisory only. If the device is asleep, it will not wake just to
847
// service the timeout.
848
mPendingEventIndex = 0;
850
mLock.unlock(); // release lock before poll, must be before release_wake_lock
851
release_wake_lock(WAKE_LOCK_ID);
853
int pollResult = epoll_wait(mEpollFd, mPendingEventItems, EPOLL_MAX_EVENTS, timeoutMillis);
855
acquire_wake_lock(PARTIAL_WAKE_LOCK, WAKE_LOCK_ID);
856
mLock.lock(); // reacquire lock after poll, must be after acquire_wake_lock
858
if (pollResult == 0) {
860
mPendingEventCount = 0;
864
if (pollResult < 0) {
865
// An error occurred.
866
mPendingEventCount = 0;
868
// Sleep after errors to avoid locking up the system.
869
// Hopefully the error is transient.
870
if (errno != EINTR) {
871
ALOGW("poll failed (errno=%d)\n", errno);
875
// Some events occurred.
876
mPendingEventCount = size_t(pollResult);
880
// All done, return the number of events we read.
881
return event - buffer;
884
void EventHub::wake() {
885
ALOGV("wake() called");
889
nWrite = write(mWakeWritePipeFd, "W", 1);
890
} while (nWrite == -1 && errno == EINTR);
892
if (nWrite != 1 && errno != EAGAIN) {
893
ALOGW("Could not write wake signal, errno=%d", errno);
897
void EventHub::scanDevicesLocked() {
898
status_t res = scanDirLocked(DEVICE_PATH);
900
ALOGE("scan dir failed for %s\n", DEVICE_PATH);
902
if (mDevices.indexOfKey(VIRTUAL_KEYBOARD_ID) < 0) {
903
createVirtualKeyboardLocked();
907
// ----------------------------------------------------------------------------
909
static bool containsNonZeroByte(const uint8_t* array, uint32_t startIndex, uint32_t endIndex) {
910
const uint8_t* end = array + endIndex;
912
while (array != end) {
913
if (*(array++) != 0) {
920
static const int32_t GAMEPAD_KEYCODES[] = {
921
AKEYCODE_BUTTON_A, AKEYCODE_BUTTON_B, AKEYCODE_BUTTON_C,
922
AKEYCODE_BUTTON_X, AKEYCODE_BUTTON_Y, AKEYCODE_BUTTON_Z,
923
AKEYCODE_BUTTON_L1, AKEYCODE_BUTTON_R1,
924
AKEYCODE_BUTTON_L2, AKEYCODE_BUTTON_R2,
925
AKEYCODE_BUTTON_THUMBL, AKEYCODE_BUTTON_THUMBR,
926
AKEYCODE_BUTTON_START, AKEYCODE_BUTTON_SELECT, AKEYCODE_BUTTON_MODE,
927
AKEYCODE_BUTTON_1, AKEYCODE_BUTTON_2, AKEYCODE_BUTTON_3, AKEYCODE_BUTTON_4,
928
AKEYCODE_BUTTON_5, AKEYCODE_BUTTON_6, AKEYCODE_BUTTON_7, AKEYCODE_BUTTON_8,
929
AKEYCODE_BUTTON_9, AKEYCODE_BUTTON_10, AKEYCODE_BUTTON_11, AKEYCODE_BUTTON_12,
930
AKEYCODE_BUTTON_13, AKEYCODE_BUTTON_14, AKEYCODE_BUTTON_15, AKEYCODE_BUTTON_16,
933
status_t EventHub::openDeviceLocked(const char *devicePath) {
936
ALOGV("Opening device: %s", devicePath);
938
int fd = open(devicePath, O_RDWR | O_CLOEXEC);
940
ALOGE("could not open %s, %s\n", devicePath, strerror(errno));
944
InputDeviceIdentifier identifier;
947
if(ioctl(fd, EVIOCGNAME(sizeof(buffer) - 1), &buffer) < 1) {
948
//fprintf(stderr, "could not get device name for %s, %s\n", devicePath, strerror(errno));
950
buffer[sizeof(buffer) - 1] = '\0';
951
identifier.name.setTo(buffer);
954
// Check to see if the device is on our excluded list
955
for (size_t i = 0; i < mExcludedDevices.size(); i++) {
956
const String8& item = mExcludedDevices.itemAt(i);
957
if (identifier.name == item) {
958
ALOGI("ignoring event id %s driver %s\n", devicePath, item.string());
964
// Get device driver version.
966
if(ioctl(fd, EVIOCGVERSION, &driverVersion)) {
967
ALOGE("could not get driver version for %s, %s\n", devicePath, strerror(errno));
972
// Get device identifier.
973
struct input_id inputId;
974
if(ioctl(fd, EVIOCGID, &inputId)) {
975
ALOGE("could not get device input id for %s, %s\n", devicePath, strerror(errno));
979
identifier.bus = inputId.bustype;
980
identifier.product = inputId.product;
981
identifier.vendor = inputId.vendor;
982
identifier.version = inputId.version;
984
// Get device physical location.
985
if(ioctl(fd, EVIOCGPHYS(sizeof(buffer) - 1), &buffer) < 1) {
986
//fprintf(stderr, "could not get location for %s, %s\n", devicePath, strerror(errno));
988
buffer[sizeof(buffer) - 1] = '\0';
989
identifier.location.setTo(buffer);
992
// Get device unique id.
993
if(ioctl(fd, EVIOCGUNIQ(sizeof(buffer) - 1), &buffer) < 1) {
994
//fprintf(stderr, "could not get idstring for %s, %s\n", devicePath, strerror(errno));
996
buffer[sizeof(buffer) - 1] = '\0';
997
identifier.uniqueId.setTo(buffer);
1000
// Fill in the descriptor.
1001
setDescriptor(identifier);
1003
// Make file descriptor non-blocking for use with poll().
1004
if (fcntl(fd, F_SETFL, O_NONBLOCK)) {
1005
ALOGE("Error %d making device file descriptor non-blocking.", errno);
1010
// Allocate device. (The device object takes ownership of the fd at this point.)
1011
int32_t deviceId = mNextDeviceId++;
1012
Device* device = new Device(fd, deviceId, String8(devicePath), identifier);
1014
ALOGV("add device %d: %s\n", deviceId, devicePath);
1015
ALOGV(" bus: %04x\n"
1019
identifier.bus, identifier.vendor, identifier.product, identifier.version);
1020
ALOGV(" name: \"%s\"\n", identifier.name.string());
1021
ALOGV(" location: \"%s\"\n", identifier.location.string());
1022
ALOGV(" unique id: \"%s\"\n", identifier.uniqueId.string());
1023
ALOGV(" descriptor: \"%s\"\n", identifier.descriptor.string());
1024
ALOGV(" driver: v%d.%d.%d\n",
1025
driverVersion >> 16, (driverVersion >> 8) & 0xff, driverVersion & 0xff);
1027
// Load the configuration file for the device.
1028
loadConfigurationLocked(device);
1030
// Figure out the kinds of events the device reports.
1031
ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(device->keyBitmask)), device->keyBitmask);
1032
ioctl(fd, EVIOCGBIT(EV_ABS, sizeof(device->absBitmask)), device->absBitmask);
1033
ioctl(fd, EVIOCGBIT(EV_REL, sizeof(device->relBitmask)), device->relBitmask);
1034
ioctl(fd, EVIOCGBIT(EV_SW, sizeof(device->swBitmask)), device->swBitmask);
1035
ioctl(fd, EVIOCGBIT(EV_LED, sizeof(device->ledBitmask)), device->ledBitmask);
1036
ioctl(fd, EVIOCGBIT(EV_FF, sizeof(device->ffBitmask)), device->ffBitmask);
1037
ioctl(fd, EVIOCGPROP(sizeof(device->propBitmask)), device->propBitmask);
1039
// See if this is a keyboard. Ignore everything in the button range except for
1040
// joystick and gamepad buttons which are handled like keyboards for the most part.
1041
bool haveKeyboardKeys = containsNonZeroByte(device->keyBitmask, 0, sizeof_bit_array(BTN_MISC))
1042
|| containsNonZeroByte(device->keyBitmask, sizeof_bit_array(KEY_OK),
1043
sizeof_bit_array(KEY_MAX + 1));
1044
bool haveGamepadButtons = containsNonZeroByte(device->keyBitmask, sizeof_bit_array(BTN_MISC),
1045
sizeof_bit_array(BTN_MOUSE))
1046
|| containsNonZeroByte(device->keyBitmask, sizeof_bit_array(BTN_JOYSTICK),
1047
sizeof_bit_array(BTN_DIGI));
1048
if (haveKeyboardKeys || haveGamepadButtons) {
1049
device->classes |= INPUT_DEVICE_CLASS_KEYBOARD;
1052
// See if this is a cursor device such as a trackball or mouse.
1053
if (test_bit(BTN_MOUSE, device->keyBitmask)
1054
&& test_bit(REL_X, device->relBitmask)
1055
&& test_bit(REL_Y, device->relBitmask)) {
1056
device->classes |= INPUT_DEVICE_CLASS_CURSOR;
1059
// See if this is a touch pad.
1060
// Is this a new modern multi-touch driver?
1061
if (test_bit(ABS_MT_POSITION_X, device->absBitmask)
1062
&& test_bit(ABS_MT_POSITION_Y, device->absBitmask)) {
1063
// Some joysticks such as the PS3 controller report axes that conflict
1064
// with the ABS_MT range. Try to confirm that the device really is
1066
if (test_bit(BTN_TOUCH, device->keyBitmask) || !haveGamepadButtons) {
1067
device->classes |= INPUT_DEVICE_CLASS_TOUCH | INPUT_DEVICE_CLASS_TOUCH_MT;
1069
// Is this an old style single-touch driver?
1070
} else if (test_bit(BTN_TOUCH, device->keyBitmask)
1071
&& test_bit(ABS_X, device->absBitmask)
1072
&& test_bit(ABS_Y, device->absBitmask)) {
1073
device->classes |= INPUT_DEVICE_CLASS_TOUCH;
1076
// See if this device is a joystick.
1077
// Assumes that joysticks always have gamepad buttons in order to distinguish them
1078
// from other devices such as accelerometers that also have absolute axes.
1079
if (haveGamepadButtons) {
1080
uint32_t assumedClasses = device->classes | INPUT_DEVICE_CLASS_JOYSTICK;
1081
for (int i = 0; i <= ABS_MAX; i++) {
1082
if (test_bit(i, device->absBitmask)
1083
&& (getAbsAxisUsage(i, assumedClasses) & INPUT_DEVICE_CLASS_JOYSTICK)) {
1084
device->classes = assumedClasses;
1090
// Check whether this device has switches.
1091
for (int i = 0; i <= SW_MAX; i++) {
1092
if (test_bit(i, device->swBitmask)) {
1093
device->classes |= INPUT_DEVICE_CLASS_SWITCH;
1098
// Check whether this device supports the vibrator.
1099
if (test_bit(FF_RUMBLE, device->ffBitmask)) {
1100
device->classes |= INPUT_DEVICE_CLASS_VIBRATOR;
1103
// Configure virtual keys.
1104
if ((device->classes & INPUT_DEVICE_CLASS_TOUCH)) {
1105
// Load the virtual keys for the touch screen, if any.
1106
// We do this now so that we can make sure to load the keymap if necessary.
1107
status_t status = loadVirtualKeyMapLocked(device);
1109
device->classes |= INPUT_DEVICE_CLASS_KEYBOARD;
1113
// Load the key map.
1114
// We need to do this for joysticks too because the key layout may specify axes.
1115
status_t keyMapStatus = NAME_NOT_FOUND;
1116
if (device->classes & (INPUT_DEVICE_CLASS_KEYBOARD | INPUT_DEVICE_CLASS_JOYSTICK)) {
1117
// Load the keymap for the device.
1118
keyMapStatus = loadKeyMapLocked(device);
1121
// Configure the keyboard, gamepad or virtual keyboard.
1122
if (device->classes & INPUT_DEVICE_CLASS_KEYBOARD) {
1123
// Register the keyboard as a built-in keyboard if it is eligible.
1125
&& mBuiltInKeyboardId == NO_BUILT_IN_KEYBOARD
1126
&& isEligibleBuiltInKeyboard(device->identifier,
1127
device->configuration, &device->keyMap)) {
1128
mBuiltInKeyboardId = device->id;
1131
// 'Q' key support = cheap test of whether this is an alpha-capable kbd
1132
if (hasKeycodeLocked(device, AKEYCODE_Q)) {
1133
device->classes |= INPUT_DEVICE_CLASS_ALPHAKEY;
1136
// See if this device has a DPAD.
1137
if (hasKeycodeLocked(device, AKEYCODE_DPAD_UP) &&
1138
hasKeycodeLocked(device, AKEYCODE_DPAD_DOWN) &&
1139
hasKeycodeLocked(device, AKEYCODE_DPAD_LEFT) &&
1140
hasKeycodeLocked(device, AKEYCODE_DPAD_RIGHT) &&
1141
hasKeycodeLocked(device, AKEYCODE_DPAD_CENTER)) {
1142
device->classes |= INPUT_DEVICE_CLASS_DPAD;
1145
// See if this device has a gamepad.
1146
for (size_t i = 0; i < sizeof(GAMEPAD_KEYCODES)/sizeof(GAMEPAD_KEYCODES[0]); i++) {
1147
if (hasKeycodeLocked(device, GAMEPAD_KEYCODES[i])) {
1148
device->classes |= INPUT_DEVICE_CLASS_GAMEPAD;
1154
// If the device isn't recognized as something we handle, don't monitor it.
1155
if (device->classes == 0) {
1156
ALOGV("Dropping device: id=%d, path='%s', name='%s'",
1157
deviceId, devicePath, device->identifier.name.string());
1162
// Determine whether the device is external or internal.
1163
if (isExternalDeviceLocked(device)) {
1164
device->classes |= INPUT_DEVICE_CLASS_EXTERNAL;
1167
// Register with epoll.
1168
struct epoll_event eventItem;
1169
memset(&eventItem, 0, sizeof(eventItem));
1170
eventItem.events = EPOLLIN;
1171
eventItem.data.u32 = deviceId;
1172
if (epoll_ctl(mEpollFd, EPOLL_CTL_ADD, fd, &eventItem)) {
1173
ALOGE("Could not add device fd to epoll instance. errno=%d", errno);
1178
// Enable wake-lock behavior on kernels that support it.
1179
// TODO: Only need this for devices that can really wake the system.
1180
bool usingSuspendBlockIoctl = !ioctl(fd, EVIOCSSUSPENDBLOCK, 1);
1182
// Tell the kernel that we want to use the monotonic clock for reporting timestamps
1183
// associated with input events. This is important because the input system
1184
// uses the timestamps extensively and assumes they were recorded using the monotonic
1187
// In older kernel, before Linux 3.4, there was no way to tell the kernel which
1188
// clock to use to input event timestamps. The standard kernel behavior was to
1189
// record a real time timestamp, which isn't what we want. Android kernels therefore
1190
// contained a patch to the evdev_event() function in drivers/input/evdev.c to
1191
// replace the call to do_gettimeofday() with ktime_get_ts() to cause the monotonic
1192
// clock to be used instead of the real time clock.
1194
// As of Linux 3.4, there is a new EVIOCSCLOCKID ioctl to set the desired clock.
1195
// Therefore, we no longer require the Android-specific kernel patch described above
1196
// as long as we make sure to set select the monotonic clock. We do that here.
1197
int clockId = CLOCK_MONOTONIC;
1198
bool usingClockIoctl = !ioctl(fd, EVIOCSCLOCKID, &clockId);
1200
ALOGI("New device: id=%d, fd=%d, path='%s', name='%s', classes=0x%x, "
1201
"configuration='%s', keyLayout='%s', keyCharacterMap='%s', builtinKeyboard=%s, "
1202
"usingSuspendBlockIoctl=%s, usingClockIoctl=%s",
1203
deviceId, fd, devicePath, device->identifier.name.string(),
1205
device->configurationFile.string(),
1206
device->keyMap.keyLayoutFile.string(),
1207
device->keyMap.keyCharacterMapFile.string(),
1208
toString(mBuiltInKeyboardId == deviceId),
1209
toString(usingSuspendBlockIoctl), toString(usingClockIoctl));
1211
addDeviceLocked(device);
1215
void EventHub::createVirtualKeyboardLocked() {
1216
InputDeviceIdentifier identifier;
1217
identifier.name = "Virtual";
1218
identifier.uniqueId = "<virtual>";
1219
setDescriptor(identifier);
1221
Device* device = new Device(-1, VIRTUAL_KEYBOARD_ID, String8("<virtual>"), identifier);
1222
device->classes = INPUT_DEVICE_CLASS_KEYBOARD
1223
| INPUT_DEVICE_CLASS_ALPHAKEY
1224
| INPUT_DEVICE_CLASS_DPAD
1225
| INPUT_DEVICE_CLASS_VIRTUAL;
1226
loadKeyMapLocked(device);
1227
addDeviceLocked(device);
1230
void EventHub::addDeviceLocked(Device* device) {
1231
mDevices.add(device->id, device);
1232
device->next = mOpeningDevices;
1233
mOpeningDevices = device;
1236
void EventHub::loadConfigurationLocked(Device* device) {
1237
device->configurationFile = getInputDeviceConfigurationFilePathByDeviceIdentifier(
1238
device->identifier, INPUT_DEVICE_CONFIGURATION_FILE_TYPE_CONFIGURATION);
1239
if (device->configurationFile.isEmpty()) {
1240
ALOGD("No input device configuration file found for device '%s'.",
1241
device->identifier.name.string());
1243
status_t status = PropertyMap::load(device->configurationFile,
1244
&device->configuration);
1246
ALOGE("Error loading input device configuration file for device '%s'. "
1247
"Using default configuration.",
1248
device->identifier.name.string());
1253
status_t EventHub::loadVirtualKeyMapLocked(Device* device) {
1254
// The virtual key map is supplied by the kernel as a system board property file.
1256
path.append("/sys/board_properties/virtualkeys.");
1257
path.append(device->identifier.name);
1258
if (access(path.string(), R_OK)) {
1259
return NAME_NOT_FOUND;
1261
return VirtualKeyMap::load(path, &device->virtualKeyMap);
1264
status_t EventHub::loadKeyMapLocked(Device* device) {
1265
return device->keyMap.load(device->identifier, device->configuration);
1268
bool EventHub::isExternalDeviceLocked(Device* device) {
1269
if (device->configuration) {
1271
if (device->configuration->tryGetProperty(String8("device.internal"), value)) {
1275
return device->identifier.bus == BUS_USB || device->identifier.bus == BUS_BLUETOOTH;
1278
bool EventHub::hasKeycodeLocked(Device* device, int keycode) const {
1279
if (!device->keyMap.haveKeyLayout() || !device->keyBitmask) {
1283
Vector<int32_t> scanCodes;
1284
device->keyMap.keyLayoutMap->findScanCodesForKey(keycode, &scanCodes);
1285
const size_t N = scanCodes.size();
1286
for (size_t i=0; i<N && i<=KEY_MAX; i++) {
1287
int32_t sc = scanCodes.itemAt(i);
1288
if (sc >= 0 && sc <= KEY_MAX && test_bit(sc, device->keyBitmask)) {
1296
status_t EventHub::closeDeviceByPathLocked(const char *devicePath) {
1297
Device* device = getDeviceByPathLocked(devicePath);
1299
closeDeviceLocked(device);
1302
ALOGV("Remove device: %s not found, device may already have been removed.", devicePath);
1306
void EventHub::closeAllDevicesLocked() {
1307
while (mDevices.size() > 0) {
1308
closeDeviceLocked(mDevices.valueAt(mDevices.size() - 1));
1312
void EventHub::closeDeviceLocked(Device* device) {
1313
ALOGI("Removed device: path=%s name=%s id=%d fd=%d classes=0x%x\n",
1314
device->path.string(), device->identifier.name.string(), device->id,
1315
device->fd, device->classes);
1317
if (device->id == mBuiltInKeyboardId) {
1318
ALOGW("built-in keyboard device %s (id=%d) is closing! the apps will not like this",
1319
device->path.string(), mBuiltInKeyboardId);
1320
mBuiltInKeyboardId = NO_BUILT_IN_KEYBOARD;
1323
if (!device->isVirtual()) {
1324
if (epoll_ctl(mEpollFd, EPOLL_CTL_DEL, device->fd, NULL)) {
1325
ALOGW("Could not remove device fd from epoll instance. errno=%d", errno);
1329
mDevices.removeItem(device->id);
1332
// Unlink for opening devices list if it is present.
1333
Device* pred = NULL;
1335
for (Device* entry = mOpeningDevices; entry != NULL; ) {
1336
if (entry == device) {
1341
entry = entry->next;
1344
// Unlink the device from the opening devices list then delete it.
1345
// We don't need to tell the client that the device was closed because
1346
// it does not even know it was opened in the first place.
1347
ALOGI("Device %s was immediately closed after opening.", device->path.string());
1349
pred->next = device->next;
1351
mOpeningDevices = device->next;
1355
// Link into closing devices list.
1356
// The device will be deleted later after we have informed the client.
1357
device->next = mClosingDevices;
1358
mClosingDevices = device;
1362
status_t EventHub::readNotifyLocked() {
1364
char devname[PATH_MAX];
1366
char event_buf[512];
1369
struct inotify_event *event;
1371
ALOGV("EventHub::readNotify nfd: %d\n", mINotifyFd);
1372
res = read(mINotifyFd, event_buf, sizeof(event_buf));
1373
if(res < (int)sizeof(*event)) {
1376
ALOGW("could not get event, %s\n", strerror(errno));
1379
//printf("got %d bytes of event information\n", res);
1381
strcpy(devname, DEVICE_PATH);
1382
filename = devname + strlen(devname);
1385
while(res >= (int)sizeof(*event)) {
1386
event = (struct inotify_event *)(event_buf + event_pos);
1387
//printf("%d: %08x \"%s\"\n", event->wd, event->mask, event->len ? event->name : "");
1389
strcpy(filename, event->name);
1390
if(event->mask & IN_CREATE) {
1391
openDeviceLocked(devname);
1393
ALOGI("Removing device '%s' due to inotify event\n", devname);
1394
closeDeviceByPathLocked(devname);
1397
event_size = sizeof(*event) + event->len;
1399
event_pos += event_size;
1404
status_t EventHub::scanDirLocked(const char *dirname)
1406
char devname[PATH_MAX];
1410
dir = opendir(dirname);
1413
strcpy(devname, dirname);
1414
filename = devname + strlen(devname);
1416
while((de = readdir(dir))) {
1417
if(de->d_name[0] == '.' &&
1418
(de->d_name[1] == '\0' ||
1419
(de->d_name[1] == '.' && de->d_name[2] == '\0')))
1421
strcpy(filename, de->d_name);
1422
openDeviceLocked(devname);
1428
void EventHub::requestReopenDevices() {
1429
ALOGV("requestReopenDevices() called");
1431
AutoMutex _l(mLock);
1432
mNeedToReopenDevices = true;
1435
void EventHub::dump(String8& dump) {
1436
dump.append("Event Hub State:\n");
1439
AutoMutex _l(mLock);
1441
dump.appendFormat(INDENT "BuiltInKeyboardId: %d\n", mBuiltInKeyboardId);
1443
dump.append(INDENT "Devices:\n");
1445
for (size_t i = 0; i < mDevices.size(); i++) {
1446
const Device* device = mDevices.valueAt(i);
1447
if (mBuiltInKeyboardId == device->id) {
1448
dump.appendFormat(INDENT2 "%d: %s (aka device 0 - built-in keyboard)\n",
1449
device->id, device->identifier.name.string());
1451
dump.appendFormat(INDENT2 "%d: %s\n", device->id,
1452
device->identifier.name.string());
1454
dump.appendFormat(INDENT3 "Classes: 0x%08x\n", device->classes);
1455
dump.appendFormat(INDENT3 "Path: %s\n", device->path.string());
1456
dump.appendFormat(INDENT3 "Descriptor: %s\n", device->identifier.descriptor.string());
1457
dump.appendFormat(INDENT3 "Location: %s\n", device->identifier.location.string());
1458
dump.appendFormat(INDENT3 "UniqueId: %s\n", device->identifier.uniqueId.string());
1459
dump.appendFormat(INDENT3 "Identifier: bus=0x%04x, vendor=0x%04x, "
1460
"product=0x%04x, version=0x%04x\n",
1461
device->identifier.bus, device->identifier.vendor,
1462
device->identifier.product, device->identifier.version);
1463
dump.appendFormat(INDENT3 "KeyLayoutFile: %s\n",
1464
device->keyMap.keyLayoutFile.string());
1465
dump.appendFormat(INDENT3 "KeyCharacterMapFile: %s\n",
1466
device->keyMap.keyCharacterMapFile.string());
1467
dump.appendFormat(INDENT3 "ConfigurationFile: %s\n",
1468
device->configurationFile.string());
1469
dump.appendFormat(INDENT3 "HaveKeyboardLayoutOverlay: %s\n",
1470
toString(device->overlayKeyMap != NULL));
1475
void EventHub::monitor() {
1476
// Acquire and release the lock to ensure that the event hub has not deadlocked.
1482
}; // namespace android