1682 lines
61 KiB
C++
1682 lines
61 KiB
C++
/*
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* Copyright (C) 2005 The Android Open Source Project
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*
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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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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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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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*/
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#include <assert.h>
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#include <dirent.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <inttypes.h>
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#include <memory.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/epoll.h>
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#include <sys/limits.h>
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#include <sys/inotify.h>
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#include <sys/ioctl.h>
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#include <sys/utsname.h>
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#include <unistd.h>
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#define LOG_TAG "EventHub"
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// #define LOG_NDEBUG 0
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#include "EventHub.h"
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#include <hardware_legacy/power.h>
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#include <cutils/properties.h>
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#include <openssl/sha.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 <input/KeyLayoutMap.h>
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#include <input/KeyCharacterMap.h>
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#include <input/VirtualKeyMap.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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*/
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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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#define INDENT " "
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#define INDENT2 " "
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#define INDENT3 " "
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namespace android {
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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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{
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return (v1 > v2) ? v1 : v2;
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}
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static inline const char* toString(bool value) {
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return value ? "true" : "false";
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}
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static String8 sha1(const String8& in) {
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SHA_CTX ctx;
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SHA1_Init(&ctx);
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SHA1_Update(&ctx, reinterpret_cast<const u_char*>(in.string()), in.size());
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u_char digest[SHA_DIGEST_LENGTH];
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SHA1_Final(digest, &ctx);
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String8 out;
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for (size_t i = 0; i < SHA_DIGEST_LENGTH; i++) {
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out.appendFormat("%02x", digest[i]);
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}
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return out;
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}
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static void getLinuxRelease(int* major, int* minor) {
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struct utsname info;
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if (uname(&info) || sscanf(info.release, "%d.%d", major, minor) <= 0) {
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*major = 0, *minor = 0;
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ALOGE("Could not get linux version: %s", strerror(errno));
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}
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}
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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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switch (axis) {
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case ABS_X:
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case ABS_Y:
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case ABS_PRESSURE:
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case ABS_TOOL_WIDTH:
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case ABS_DISTANCE:
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case ABS_TILT_X:
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case ABS_TILT_Y:
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case ABS_MT_SLOT:
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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_BLOB_ID:
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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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}
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}
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// Joystick devices get the rest.
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return deviceClasses & INPUT_DEVICE_CLASS_JOYSTICK;
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}
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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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next(NULL),
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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), controllerNumber(0),
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timestampOverrideSec(0), timestampOverrideUsec(0) {
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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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}
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EventHub::Device::~Device() {
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close();
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delete configuration;
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delete virtualKeyMap;
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}
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void EventHub::Device::close() {
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if (fd >= 0) {
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::close(fd);
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fd = -1;
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}
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}
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// --- EventHub ---
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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), mControllerNumbers(),
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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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DEVICE_PATH, errno);
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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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int wakeFds[2];
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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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errno);
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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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errno);
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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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errno);
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int major, minor;
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getLinuxRelease(&major, &minor);
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// EPOLLWAKEUP was introduced in kernel 3.5
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mUsingEpollWakeup = major > 3 || (major == 3 && minor >= 5);
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}
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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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delete device;
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}
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::close(mEpollFd);
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::close(mINotifyFd);
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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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}
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InputDeviceIdentifier EventHub::getDeviceIdentifier(int32_t deviceId) const {
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AutoMutex _l(mLock);
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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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}
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uint32_t EventHub::getDeviceClasses(int32_t deviceId) const {
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AutoMutex _l(mLock);
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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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}
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int32_t EventHub::getDeviceControllerNumber(int32_t deviceId) const {
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AutoMutex _l(mLock);
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Device* device = getDeviceLocked(deviceId);
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if (device == NULL) return 0;
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return device->controllerNumber;
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}
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void EventHub::getConfiguration(int32_t deviceId, PropertyMap* outConfiguration) const {
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AutoMutex _l(mLock);
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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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} else {
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outConfiguration->clear();
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}
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}
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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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AutoMutex _l(mLock);
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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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return -errno;
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}
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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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}
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return OK;
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}
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}
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return -1;
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}
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bool EventHub::hasRelativeAxis(int32_t deviceId, int axis) const {
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if (axis >= 0 && axis <= REL_MAX) {
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AutoMutex _l(mLock);
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Device* device = getDeviceLocked(deviceId);
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if (device) {
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return test_bit(axis, device->relBitmask);
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}
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}
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return false;
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}
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bool EventHub::hasInputProperty(int32_t deviceId, int property) const {
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if (property >= 0 && property <= INPUT_PROP_MAX) {
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AutoMutex _l(mLock);
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Device* device = getDeviceLocked(deviceId);
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if (device) {
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return test_bit(property, device->propBitmask);
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}
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}
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return false;
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}
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int32_t EventHub::getScanCodeState(int32_t deviceId, int32_t scanCode) const {
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if (scanCode >= 0 && scanCode <= KEY_MAX) {
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AutoMutex _l(mLock);
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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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}
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}
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}
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return AKEY_STATE_UNKNOWN;
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}
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int32_t EventHub::getKeyCodeState(int32_t deviceId, int32_t keyCode) const {
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AutoMutex _l(mLock);
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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) {
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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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for (size_t i = 0; i < scanCodes.size(); i++) {
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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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}
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}
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return AKEY_STATE_UP;
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}
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}
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}
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return AKEY_STATE_UNKNOWN;
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}
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int32_t EventHub::getSwitchState(int32_t deviceId, int32_t sw) const {
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if (sw >= 0 && sw <= SW_MAX) {
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AutoMutex _l(mLock);
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Device* device = getDeviceLocked(deviceId);
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if (device && !device->isVirtual() && test_bit(sw, device->swBitmask)) {
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uint8_t swState[sizeof_bit_array(SW_MAX + 1)];
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memset(swState, 0, sizeof(swState));
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if (ioctl(device->fd, EVIOCGSW(sizeof(swState)), swState) >= 0) {
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return test_bit(sw, swState) ? AKEY_STATE_DOWN : AKEY_STATE_UP;
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}
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}
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}
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return AKEY_STATE_UNKNOWN;
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}
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status_t EventHub::getAbsoluteAxisValue(int32_t deviceId, int32_t axis, int32_t* outValue) const {
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*outValue = 0;
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if (axis >= 0 && axis <= ABS_MAX) {
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AutoMutex _l(mLock);
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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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return -errno;
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}
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*outValue = info.value;
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return OK;
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}
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}
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return -1;
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}
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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 {
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AutoMutex _l(mLock);
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Device* device = getDeviceLocked(deviceId);
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if (device && device->keyMap.haveKeyLayout()) {
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Vector<int32_t> scanCodes;
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for (size_t codeIndex = 0; codeIndex < numCodes; codeIndex++) {
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scanCodes.clear();
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status_t err = device->keyMap.keyLayoutMap->findScanCodesForKey(
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keyCodes[codeIndex], &scanCodes);
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if (! err) {
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// check the possible scan codes identified by the layout map against the
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// map of codes actually emitted by the driver
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for (size_t sc = 0; sc < scanCodes.size(); sc++) {
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if (test_bit(scanCodes[sc], device->keyBitmask)) {
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outFlags[codeIndex] = 1;
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break;
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}
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}
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}
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}
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return true;
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}
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return false;
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}
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status_t EventHub::mapKey(int32_t deviceId, int32_t scanCode, int32_t usageCode,
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int32_t* outKeycode, uint32_t* outFlags) const {
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AutoMutex _l(mLock);
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Device* device = getDeviceLocked(deviceId);
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if (device) {
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// Check the key character map first.
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sp<KeyCharacterMap> kcm = device->getKeyCharacterMap();
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if (kcm != NULL) {
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if (!kcm->mapKey(scanCode, usageCode, outKeycode)) {
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*outFlags = 0;
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return NO_ERROR;
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}
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}
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// Check the key layout next.
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if (device->keyMap.haveKeyLayout()) {
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if (!device->keyMap.keyLayoutMap->mapKey(
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scanCode, usageCode, outKeycode, outFlags)) {
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return NO_ERROR;
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}
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}
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}
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*outKeycode = 0;
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*outFlags = 0;
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return NAME_NOT_FOUND;
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}
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status_t EventHub::mapAxis(int32_t deviceId, int32_t scanCode, AxisInfo* outAxisInfo) const {
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AutoMutex _l(mLock);
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Device* device = getDeviceLocked(deviceId);
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if (device && device->keyMap.haveKeyLayout()) {
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status_t err = device->keyMap.keyLayoutMap->mapAxis(scanCode, outAxisInfo);
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if (err == NO_ERROR) {
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return NO_ERROR;
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}
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}
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return NAME_NOT_FOUND;
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}
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void EventHub::setExcludedDevices(const Vector<String8>& devices) {
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AutoMutex _l(mLock);
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mExcludedDevices = devices;
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}
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bool EventHub::hasScanCode(int32_t deviceId, int32_t scanCode) const {
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AutoMutex _l(mLock);
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Device* device = getDeviceLocked(deviceId);
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if (device && scanCode >= 0 && scanCode <= KEY_MAX) {
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if (test_bit(scanCode, device->keyBitmask)) {
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return true;
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}
|
|
}
|
|
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: %" PRId32
|
|
" bufferSize: %zu 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));
|
|
}
|
|
|
|
// 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 %" PRId64 ", now %" PRId64, 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 %" PRId64 ", current time %" PRId64
|
|
", call time %" PRId64 ". "
|
|
"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 %" PRId64 ", current time %" PRId64
|
|
", call time %" PRId64 ".",
|
|
event->when, time, now);
|
|
}
|
|
}
|
|
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 has a mic.
|
|
if (deviceHasMicLocked(device)) {
|
|
device->classes |= INPUT_DEVICE_CLASS_MIC;
|
|
}
|
|
|
|
// 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;
|
|
if (mUsingEpollWakeup) {
|
|
eventItem.events |= EPOLLWAKEUP;
|
|
}
|
|
eventItem.data.u32 = deviceId;
|
|
if (epoll_ctl(mEpollFd, EPOLL_CTL_ADD, fd, &eventItem)) {
|
|
ALOGE("Could not add device fd to epoll instance. errno=%d", errno);
|
|
delete device;
|
|
return -1;
|
|
}
|
|
|
|
String8 wakeMechanism("EPOLLWAKEUP");
|
|
if (!mUsingEpollWakeup) {
|
|
#ifndef EVIOCSSUSPENDBLOCK
|
|
// uapi headers don't include EVIOCSSUSPENDBLOCK, and future kernels
|
|
// will use an epoll flag instead, so as long as we want to support
|
|
// this feature, we need to be prepared to define the ioctl ourselves.
|
|
#define EVIOCSSUSPENDBLOCK _IOW('E', 0x91, int)
|
|
#endif
|
|
if (ioctl(fd, EVIOCSSUSPENDBLOCK, 1)) {
|
|
wakeMechanism = "<none>";
|
|
} else {
|
|
wakeMechanism = "EVIOCSSUSPENDBLOCK";
|
|
}
|
|
}
|
|
|
|
// Tell the kernel that we want to use the monotonic clock for reporting timestamps
|
|
// associated with input events. This is important because the input system
|
|
// uses the timestamps extensively and assumes they were recorded using the monotonic
|
|
// clock.
|
|
//
|
|
// In older kernel, before Linux 3.4, there was no way to tell the kernel which
|
|
// clock to use to input event timestamps. The standard kernel behavior was to
|
|
// record a real time timestamp, which isn't what we want. Android kernels therefore
|
|
// contained a patch to the evdev_event() function in drivers/input/evdev.c to
|
|
// replace the call to do_gettimeofday() with ktime_get_ts() to cause the monotonic
|
|
// clock to be used instead of the real time clock.
|
|
//
|
|
// As of Linux 3.4, there is a new EVIOCSCLOCKID ioctl to set the desired clock.
|
|
// Therefore, we no longer require the Android-specific kernel patch described above
|
|
// as long as we make sure to set select the monotonic clock. We do that here.
|
|
int clockId = CLOCK_MONOTONIC;
|
|
bool usingClockIoctl = !ioctl(fd, EVIOCSCLOCKID, &clockId);
|
|
|
|
ALOGI("New device: id=%d, fd=%d, path='%s', name='%s', classes=0x%x, "
|
|
"configuration='%s', keyLayout='%s', keyCharacterMap='%s', builtinKeyboard=%s, "
|
|
"wakeMechanism=%s, usingClockIoctl=%s",
|
|
deviceId, fd, devicePath, device->identifier.name.string(),
|
|
device->classes,
|
|
device->configurationFile.string(),
|
|
device->keyMap.keyLayoutFile.string(),
|
|
device->keyMap.keyCharacterMapFile.string(),
|
|
toString(mBuiltInKeyboardId == deviceId),
|
|
wakeMechanism.string(), toString(usingClockIoctl));
|
|
|
|
addDeviceLocked(device);
|
|
return 0;
|
|
}
|
|
|
|
void EventHub::createVirtualKeyboardLocked() {
|
|
InputDeviceIdentifier identifier;
|
|
identifier.name = "Virtual";
|
|
identifier.uniqueId = "<virtual>";
|
|
assignDescriptorLocked(identifier);
|
|
|
|
Device* device = new Device(-1, VIRTUAL_KEYBOARD_ID, String8("<virtual>"), identifier);
|
|
device->classes = INPUT_DEVICE_CLASS_KEYBOARD
|
|
| INPUT_DEVICE_CLASS_ALPHAKEY
|
|
| INPUT_DEVICE_CLASS_DPAD
|
|
| INPUT_DEVICE_CLASS_VIRTUAL;
|
|
loadKeyMapLocked(device);
|
|
addDeviceLocked(device);
|
|
}
|
|
|
|
void EventHub::addDeviceLocked(Device* device) {
|
|
mDevices.add(device->id, device);
|
|
device->next = mOpeningDevices;
|
|
mOpeningDevices = device;
|
|
}
|
|
|
|
void EventHub::loadConfigurationLocked(Device* device) {
|
|
device->configurationFile = getInputDeviceConfigurationFilePathByDeviceIdentifier(
|
|
device->identifier, INPUT_DEVICE_CONFIGURATION_FILE_TYPE_CONFIGURATION);
|
|
if (device->configurationFile.isEmpty()) {
|
|
ALOGD("No input device configuration file found for device '%s'.",
|
|
device->identifier.name.string());
|
|
} else {
|
|
status_t status = PropertyMap::load(device->configurationFile,
|
|
&device->configuration);
|
|
if (status) {
|
|
ALOGE("Error loading input device configuration file for device '%s'. "
|
|
"Using default configuration.",
|
|
device->identifier.name.string());
|
|
}
|
|
}
|
|
}
|
|
|
|
status_t EventHub::loadVirtualKeyMapLocked(Device* device) {
|
|
// The virtual key map is supplied by the kernel as a system board property file.
|
|
String8 path;
|
|
path.append("/sys/board_properties/virtualkeys.");
|
|
path.append(device->identifier.name);
|
|
if (access(path.string(), R_OK)) {
|
|
return NAME_NOT_FOUND;
|
|
}
|
|
return VirtualKeyMap::load(path, &device->virtualKeyMap);
|
|
}
|
|
|
|
status_t EventHub::loadKeyMapLocked(Device* device) {
|
|
return device->keyMap.load(device->identifier, device->configuration);
|
|
}
|
|
|
|
bool EventHub::isExternalDeviceLocked(Device* device) {
|
|
if (device->configuration) {
|
|
bool value;
|
|
if (device->configuration->tryGetProperty(String8("device.internal"), value)) {
|
|
return !value;
|
|
}
|
|
}
|
|
return device->identifier.bus == BUS_USB || device->identifier.bus == BUS_BLUETOOTH;
|
|
}
|
|
|
|
bool EventHub::deviceHasMicLocked(Device* device) {
|
|
if (device->configuration) {
|
|
bool value;
|
|
if (device->configuration->tryGetProperty(String8("audio.mic"), value)) {
|
|
return value;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
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()) {
|
|
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()) {
|
|
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
|