2 * Copyright (C) 2005 The Android Open Source Project
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
27 #include <sys/epoll.h>
28 #include <sys/limits.h>
29 #include <sys/inotify.h>
30 #include <sys/ioctl.h>
31 #include <sys/utsname.h>
34 #define LOG_TAG "EventHub"
36 // #define LOG_NDEBUG 0
40 #include <hardware_legacy/power.h>
42 #include <cutils/properties.h>
43 #include <openssl/sha.h>
44 #include <utils/Log.h>
45 #include <utils/Timers.h>
46 #include <utils/threads.h>
47 #include <utils/Errors.h>
49 #include <input/KeyLayoutMap.h>
50 #include <input/KeyCharacterMap.h>
51 #include <input/VirtualKeyMap.h>
53 /* this macro is used to tell if "bit" is set in "array"
54 * it selects a byte from the array, and does a boolean AND
55 * operation with a byte that only has the relevant bit set.
56 * eg. to check for the 12th bit, we do (array[1] & 1<<4)
58 #define test_bit(bit, array) (array[bit/8] & (1<<(bit%8)))
60 /* this macro computes the number of bytes needed to represent a bit array of the specified size */
61 #define sizeof_bit_array(bits) ((bits + 7) / 8)
69 static const char *WAKE_LOCK_ID = "KeyEvents";
70 static const char *DEVICE_PATH = "/dev/input";
72 /* return the larger integer */
73 static inline int max(int v1, int v2)
75 return (v1 > v2) ? v1 : v2;
78 static inline const char* toString(bool value) {
79 return value ? "true" : "false";
82 static String8 sha1(const String8& in) {
85 SHA1_Update(&ctx, reinterpret_cast<const u_char*>(in.string()), in.size());
86 u_char digest[SHA_DIGEST_LENGTH];
87 SHA1_Final(digest, &ctx);
90 for (size_t i = 0; i < SHA_DIGEST_LENGTH; i++) {
91 out.appendFormat("%02x", digest[i]);
96 static void getLinuxRelease(int* major, int* minor) {
98 if (uname(&info) || sscanf(info.release, "%d.%d", major, minor) <= 0) {
99 *major = 0, *minor = 0;
100 ALOGE("Could not get linux version: %s", strerror(errno));
104 // --- Global Functions ---
106 uint32_t getAbsAxisUsage(int32_t axis, uint32_t deviceClasses) {
107 // Touch devices get dibs on touch-related axes.
108 if (deviceClasses & INPUT_DEVICE_CLASS_TOUCH) {
118 case ABS_MT_TOUCH_MAJOR:
119 case ABS_MT_TOUCH_MINOR:
120 case ABS_MT_WIDTH_MAJOR:
121 case ABS_MT_WIDTH_MINOR:
122 case ABS_MT_ORIENTATION:
123 case ABS_MT_POSITION_X:
124 case ABS_MT_POSITION_Y:
125 case ABS_MT_TOOL_TYPE:
127 case ABS_MT_TRACKING_ID:
128 case ABS_MT_PRESSURE:
129 case ABS_MT_DISTANCE:
130 return INPUT_DEVICE_CLASS_TOUCH;
134 // External stylus gets the pressure axis
135 if (deviceClasses & INPUT_DEVICE_CLASS_EXTERNAL_STYLUS) {
136 if (axis == ABS_PRESSURE) {
137 return INPUT_DEVICE_CLASS_EXTERNAL_STYLUS;
141 // Joystick devices get the rest.
142 return deviceClasses & INPUT_DEVICE_CLASS_JOYSTICK;
145 // --- EventHub::Device ---
147 EventHub::Device::Device(int fd, int32_t id, const String8& path,
148 const InputDeviceIdentifier& identifier) :
150 fd(fd), id(id), path(path), identifier(identifier),
151 classes(0), configuration(NULL), virtualKeyMap(NULL),
152 ffEffectPlaying(false), ffEffectId(-1), controllerNumber(0),
153 timestampOverrideSec(0), timestampOverrideUsec(0) {
154 memset(keyBitmask, 0, sizeof(keyBitmask));
155 memset(absBitmask, 0, sizeof(absBitmask));
156 memset(relBitmask, 0, sizeof(relBitmask));
157 memset(swBitmask, 0, sizeof(swBitmask));
158 memset(ledBitmask, 0, sizeof(ledBitmask));
159 memset(ffBitmask, 0, sizeof(ffBitmask));
160 memset(propBitmask, 0, sizeof(propBitmask));
163 EventHub::Device::~Device() {
165 delete configuration;
166 delete virtualKeyMap;
169 void EventHub::Device::close() {
179 const uint32_t EventHub::EPOLL_ID_INOTIFY;
180 const uint32_t EventHub::EPOLL_ID_WAKE;
181 const int EventHub::EPOLL_SIZE_HINT;
182 const int EventHub::EPOLL_MAX_EVENTS;
184 EventHub::EventHub(void) :
185 mBuiltInKeyboardId(NO_BUILT_IN_KEYBOARD), mNextDeviceId(1), mControllerNumbers(),
186 mOpeningDevices(0), mClosingDevices(0),
187 mNeedToSendFinishedDeviceScan(false),
188 mNeedToReopenDevices(false), mNeedToScanDevices(true),
189 mPendingEventCount(0), mPendingEventIndex(0), mPendingINotify(false) {
190 acquire_wake_lock(PARTIAL_WAKE_LOCK, WAKE_LOCK_ID);
192 mEpollFd = epoll_create(EPOLL_SIZE_HINT);
193 LOG_ALWAYS_FATAL_IF(mEpollFd < 0, "Could not create epoll instance. errno=%d", errno);
195 mINotifyFd = inotify_init();
196 int result = inotify_add_watch(mINotifyFd, DEVICE_PATH, IN_DELETE | IN_CREATE);
197 LOG_ALWAYS_FATAL_IF(result < 0, "Could not register INotify for %s. errno=%d",
200 struct epoll_event eventItem;
201 memset(&eventItem, 0, sizeof(eventItem));
202 eventItem.events = EPOLLIN;
203 eventItem.data.u32 = EPOLL_ID_INOTIFY;
204 result = epoll_ctl(mEpollFd, EPOLL_CTL_ADD, mINotifyFd, &eventItem);
205 LOG_ALWAYS_FATAL_IF(result != 0, "Could not add INotify to epoll instance. errno=%d", errno);
208 result = pipe(wakeFds);
209 LOG_ALWAYS_FATAL_IF(result != 0, "Could not create wake pipe. errno=%d", errno);
211 mWakeReadPipeFd = wakeFds[0];
212 mWakeWritePipeFd = wakeFds[1];
214 result = fcntl(mWakeReadPipeFd, F_SETFL, O_NONBLOCK);
215 LOG_ALWAYS_FATAL_IF(result != 0, "Could not make wake read pipe non-blocking. errno=%d",
218 result = fcntl(mWakeWritePipeFd, F_SETFL, O_NONBLOCK);
219 LOG_ALWAYS_FATAL_IF(result != 0, "Could not make wake write pipe non-blocking. errno=%d",
222 eventItem.data.u32 = EPOLL_ID_WAKE;
223 result = epoll_ctl(mEpollFd, EPOLL_CTL_ADD, mWakeReadPipeFd, &eventItem);
224 LOG_ALWAYS_FATAL_IF(result != 0, "Could not add wake read pipe to epoll instance. errno=%d",
228 getLinuxRelease(&major, &minor);
229 // EPOLLWAKEUP was introduced in kernel 3.5
230 mUsingEpollWakeup = major > 3 || (major == 3 && minor >= 5);
233 EventHub::~EventHub(void) {
234 closeAllDevicesLocked();
236 while (mClosingDevices) {
237 Device* device = mClosingDevices;
238 mClosingDevices = device->next;
244 ::close(mWakeReadPipeFd);
245 ::close(mWakeWritePipeFd);
247 release_wake_lock(WAKE_LOCK_ID);
250 InputDeviceIdentifier EventHub::getDeviceIdentifier(int32_t deviceId) const {
252 Device* device = getDeviceLocked(deviceId);
253 if (device == NULL) return InputDeviceIdentifier();
254 return device->identifier;
257 uint32_t EventHub::getDeviceClasses(int32_t deviceId) const {
259 Device* device = getDeviceLocked(deviceId);
260 if (device == NULL) return 0;
261 return device->classes;
264 int32_t EventHub::getDeviceControllerNumber(int32_t deviceId) const {
266 Device* device = getDeviceLocked(deviceId);
267 if (device == NULL) return 0;
268 return device->controllerNumber;
271 void EventHub::getConfiguration(int32_t deviceId, PropertyMap* outConfiguration) const {
273 Device* device = getDeviceLocked(deviceId);
274 if (device && device->configuration) {
275 *outConfiguration = *device->configuration;
277 outConfiguration->clear();
281 status_t EventHub::getAbsoluteAxisInfo(int32_t deviceId, int axis,
282 RawAbsoluteAxisInfo* outAxisInfo) const {
283 outAxisInfo->clear();
285 if (axis >= 0 && axis <= ABS_MAX) {
288 Device* device = getDeviceLocked(deviceId);
289 if (device && !device->isVirtual() && test_bit(axis, device->absBitmask)) {
290 struct input_absinfo info;
291 if(ioctl(device->fd, EVIOCGABS(axis), &info)) {
292 ALOGW("Error reading absolute controller %d for device %s fd %d, errno=%d",
293 axis, device->identifier.name.string(), device->fd, errno);
297 if (info.minimum != info.maximum) {
298 outAxisInfo->valid = true;
299 outAxisInfo->minValue = info.minimum;
300 outAxisInfo->maxValue = info.maximum;
301 outAxisInfo->flat = info.flat;
302 outAxisInfo->fuzz = info.fuzz;
303 outAxisInfo->resolution = info.resolution;
311 bool EventHub::hasRelativeAxis(int32_t deviceId, int axis) const {
312 if (axis >= 0 && axis <= REL_MAX) {
315 Device* device = getDeviceLocked(deviceId);
317 return test_bit(axis, device->relBitmask);
323 bool EventHub::hasInputProperty(int32_t deviceId, int property) const {
324 if (property >= 0 && property <= INPUT_PROP_MAX) {
327 Device* device = getDeviceLocked(deviceId);
329 return test_bit(property, device->propBitmask);
335 int32_t EventHub::getScanCodeState(int32_t deviceId, int32_t scanCode) const {
336 if (scanCode >= 0 && scanCode <= KEY_MAX) {
339 Device* device = getDeviceLocked(deviceId);
340 if (device && !device->isVirtual() && test_bit(scanCode, device->keyBitmask)) {
341 uint8_t keyState[sizeof_bit_array(KEY_MAX + 1)];
342 memset(keyState, 0, sizeof(keyState));
343 if (ioctl(device->fd, EVIOCGKEY(sizeof(keyState)), keyState) >= 0) {
344 return test_bit(scanCode, keyState) ? AKEY_STATE_DOWN : AKEY_STATE_UP;
348 return AKEY_STATE_UNKNOWN;
351 int32_t EventHub::getKeyCodeState(int32_t deviceId, int32_t keyCode) const {
354 Device* device = getDeviceLocked(deviceId);
355 if (device && !device->isVirtual() && device->keyMap.haveKeyLayout()) {
356 Vector<int32_t> scanCodes;
357 device->keyMap.keyLayoutMap->findScanCodesForKey(keyCode, &scanCodes);
358 if (scanCodes.size() != 0) {
359 uint8_t keyState[sizeof_bit_array(KEY_MAX + 1)];
360 memset(keyState, 0, sizeof(keyState));
361 if (ioctl(device->fd, EVIOCGKEY(sizeof(keyState)), keyState) >= 0) {
362 for (size_t i = 0; i < scanCodes.size(); i++) {
363 int32_t sc = scanCodes.itemAt(i);
364 if (sc >= 0 && sc <= KEY_MAX && test_bit(sc, keyState)) {
365 return AKEY_STATE_DOWN;
368 return AKEY_STATE_UP;
372 return AKEY_STATE_UNKNOWN;
375 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) {
397 Device* device = getDeviceLocked(deviceId);
398 if (device && !device->isVirtual() && test_bit(axis, device->absBitmask)) {
399 struct input_absinfo info;
400 if(ioctl(device->fd, EVIOCGABS(axis), &info)) {
401 ALOGW("Error reading absolute controller %d for device %s fd %d, errno=%d",
402 axis, device->identifier.name.string(), device->fd, errno);
406 *outValue = info.value;
413 bool EventHub::markSupportedKeyCodes(int32_t deviceId, size_t numCodes,
414 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(
424 keyCodes[codeIndex], &scanCodes);
426 // 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;
441 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;
490 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);
505 if (device && mapLed(device, led, &sc) == NO_ERROR) {
506 if (test_bit(sc, device->ledBitmask)) {
513 void EventHub::setLedState(int32_t deviceId, int32_t led, bool on) {
515 Device* device = getDeviceLocked(deviceId);
516 setLedStateLocked(device, led, on);
519 void EventHub::setLedStateLocked(Device* device, int32_t led, bool on) {
521 if (device && !device->isVirtual() && mapLed(device, led, &sc) != NAME_NOT_FOUND) {
522 struct input_event ev;
527 ev.value = on ? 1 : 0;
531 nWrite = write(device->fd, &ev, sizeof(struct input_event));
532 } while (nWrite == -1 && errno == EINTR);
536 void EventHub::getVirtualKeyDefinitions(int32_t deviceId,
537 Vector<VirtualKeyDefinition>& outVirtualKeys) const {
538 outVirtualKeys.clear();
541 Device* device = getDeviceLocked(deviceId);
542 if (device && device->virtualKeyMap) {
543 outVirtualKeys.appendVector(device->virtualKeyMap->getVirtualKeys());
547 sp<KeyCharacterMap> EventHub::getKeyCharacterMap(int32_t deviceId) const {
549 Device* device = getDeviceLocked(deviceId);
551 return device->getKeyCharacterMap();
556 bool EventHub::setKeyboardLayoutOverlay(int32_t deviceId,
557 const sp<KeyCharacterMap>& map) {
559 Device* device = getDeviceLocked(deviceId);
561 if (map != device->overlayKeyMap) {
562 device->overlayKeyMap = map;
563 device->combinedKeyMap = KeyCharacterMap::combine(
564 device->keyMap.keyCharacterMap, map);
571 static String8 generateDescriptor(InputDeviceIdentifier& identifier) {
572 String8 rawDescriptor;
573 rawDescriptor.appendFormat(":%04x:%04x:", identifier.vendor,
575 // TODO add handling for USB devices to not uniqueify kbs that show up twice
576 if (!identifier.uniqueId.isEmpty()) {
577 rawDescriptor.append("uniqueId:");
578 rawDescriptor.append(identifier.uniqueId);
579 } else if (identifier.nonce != 0) {
580 rawDescriptor.appendFormat("nonce:%04x", identifier.nonce);
583 if (identifier.vendor == 0 && identifier.product == 0) {
584 // If we don't know the vendor and product id, then the device is probably
585 // built-in so we need to rely on other information to uniquely identify
586 // the input device. Usually we try to avoid relying on the device name or
587 // location but for built-in input device, they are unlikely to ever change.
588 if (!identifier.name.isEmpty()) {
589 rawDescriptor.append("name:");
590 rawDescriptor.append(identifier.name);
591 } else if (!identifier.location.isEmpty()) {
592 rawDescriptor.append("location:");
593 rawDescriptor.append(identifier.location);
596 identifier.descriptor = sha1(rawDescriptor);
597 return rawDescriptor;
600 void EventHub::assignDescriptorLocked(InputDeviceIdentifier& identifier) {
601 // Compute a device descriptor that uniquely identifies the device.
602 // The descriptor is assumed to be a stable identifier. Its value should not
603 // change between reboots, reconnections, firmware updates or new releases
604 // of Android. In practice we sometimes get devices that cannot be uniquely
605 // identified. In this case we enforce uniqueness between connected devices.
606 // Ideally, we also want the descriptor to be short and relatively opaque.
608 identifier.nonce = 0;
609 String8 rawDescriptor = generateDescriptor(identifier);
610 if (identifier.uniqueId.isEmpty()) {
611 // If it didn't have a unique id check for conflicts and enforce
612 // uniqueness if necessary.
613 while(getDeviceByDescriptorLocked(identifier.descriptor) != NULL) {
615 rawDescriptor = generateDescriptor(identifier);
618 ALOGV("Created descriptor: raw=%s, cooked=%s", rawDescriptor.string(),
619 identifier.descriptor.string());
622 void EventHub::vibrate(int32_t deviceId, nsecs_t duration) {
624 Device* device = getDeviceLocked(deviceId);
625 if (device && !device->isVirtual()) {
627 memset(&effect, 0, sizeof(effect));
628 effect.type = FF_RUMBLE;
629 effect.id = device->ffEffectId;
630 effect.u.rumble.strong_magnitude = 0xc000;
631 effect.u.rumble.weak_magnitude = 0xc000;
632 effect.replay.length = (duration + 999999LL) / 1000000LL;
633 effect.replay.delay = 0;
634 if (ioctl(device->fd, EVIOCSFF, &effect)) {
635 ALOGW("Could not upload force feedback effect to device %s due to error %d.",
636 device->identifier.name.string(), errno);
639 device->ffEffectId = effect.id;
641 struct input_event ev;
645 ev.code = device->ffEffectId;
647 if (write(device->fd, &ev, sizeof(ev)) != sizeof(ev)) {
648 ALOGW("Could not start force feedback effect on device %s due to error %d.",
649 device->identifier.name.string(), errno);
652 device->ffEffectPlaying = true;
656 void EventHub::cancelVibrate(int32_t deviceId) {
658 Device* device = getDeviceLocked(deviceId);
659 if (device && !device->isVirtual()) {
660 if (device->ffEffectPlaying) {
661 device->ffEffectPlaying = false;
663 struct input_event ev;
667 ev.code = device->ffEffectId;
669 if (write(device->fd, &ev, sizeof(ev)) != sizeof(ev)) {
670 ALOGW("Could not stop force feedback effect on device %s due to error %d.",
671 device->identifier.name.string(), errno);
678 EventHub::Device* EventHub::getDeviceByDescriptorLocked(String8& descriptor) const {
679 size_t size = mDevices.size();
680 for (size_t i = 0; i < size; i++) {
681 Device* device = mDevices.valueAt(i);
682 if (descriptor.compare(device->identifier.descriptor) == 0) {
689 EventHub::Device* EventHub::getDeviceLocked(int32_t deviceId) const {
690 if (deviceId == BUILT_IN_KEYBOARD_ID) {
691 deviceId = mBuiltInKeyboardId;
693 ssize_t index = mDevices.indexOfKey(deviceId);
694 return index >= 0 ? mDevices.valueAt(index) : NULL;
697 EventHub::Device* EventHub::getDeviceByPathLocked(const char* devicePath) const {
698 for (size_t i = 0; i < mDevices.size(); i++) {
699 Device* device = mDevices.valueAt(i);
700 if (device->path == devicePath) {
707 size_t EventHub::getEvents(int timeoutMillis, RawEvent* buffer, size_t bufferSize) {
708 ALOG_ASSERT(bufferSize >= 1);
712 struct input_event readBuffer[bufferSize];
714 RawEvent* event = buffer;
715 size_t capacity = bufferSize;
718 nsecs_t now = systemTime(SYSTEM_TIME_MONOTONIC);
720 // Reopen input devices if needed.
721 if (mNeedToReopenDevices) {
722 mNeedToReopenDevices = false;
724 ALOGI("Reopening all input devices due to a configuration change.");
726 closeAllDevicesLocked();
727 mNeedToScanDevices = true;
728 break; // return to the caller before we actually rescan
731 // Report any devices that had last been added/removed.
732 while (mClosingDevices) {
733 Device* device = mClosingDevices;
734 ALOGV("Reporting device closed: id=%d, name=%s\n",
735 device->id, device->path.string());
736 mClosingDevices = device->next;
738 event->deviceId = device->id == mBuiltInKeyboardId ? BUILT_IN_KEYBOARD_ID : device->id;
739 event->type = DEVICE_REMOVED;
742 mNeedToSendFinishedDeviceScan = true;
743 if (--capacity == 0) {
748 if (mNeedToScanDevices) {
749 mNeedToScanDevices = false;
751 mNeedToSendFinishedDeviceScan = true;
754 while (mOpeningDevices != NULL) {
755 Device* device = mOpeningDevices;
756 ALOGV("Reporting device opened: id=%d, name=%s\n",
757 device->id, device->path.string());
758 mOpeningDevices = device->next;
760 event->deviceId = device->id == mBuiltInKeyboardId ? 0 : device->id;
761 event->type = DEVICE_ADDED;
763 mNeedToSendFinishedDeviceScan = true;
764 if (--capacity == 0) {
769 if (mNeedToSendFinishedDeviceScan) {
770 mNeedToSendFinishedDeviceScan = false;
772 event->type = FINISHED_DEVICE_SCAN;
774 if (--capacity == 0) {
779 // Grab the next input event.
780 bool deviceChanged = false;
781 while (mPendingEventIndex < mPendingEventCount) {
782 const struct epoll_event& eventItem = mPendingEventItems[mPendingEventIndex++];
783 if (eventItem.data.u32 == EPOLL_ID_INOTIFY) {
784 if (eventItem.events & EPOLLIN) {
785 mPendingINotify = true;
787 ALOGW("Received unexpected epoll event 0x%08x for INotify.", eventItem.events);
792 if (eventItem.data.u32 == EPOLL_ID_WAKE) {
793 if (eventItem.events & EPOLLIN) {
794 ALOGV("awoken after wake()");
799 nRead = read(mWakeReadPipeFd, buffer, sizeof(buffer));
800 } while ((nRead == -1 && errno == EINTR) || nRead == sizeof(buffer));
802 ALOGW("Received unexpected epoll event 0x%08x for wake read pipe.",
808 ssize_t deviceIndex = mDevices.indexOfKey(eventItem.data.u32);
809 if (deviceIndex < 0) {
810 ALOGW("Received unexpected epoll event 0x%08x for unknown device id %d.",
811 eventItem.events, eventItem.data.u32);
815 Device* device = mDevices.valueAt(deviceIndex);
816 if (eventItem.events & EPOLLIN) {
817 int32_t readSize = read(device->fd, readBuffer,
818 sizeof(struct input_event) * capacity);
819 if (readSize == 0 || (readSize < 0 && errno == ENODEV)) {
820 // Device was removed before INotify noticed.
821 ALOGW("could not get event, removed? (fd: %d size: %" PRId32
822 " bufferSize: %zu capacity: %zu errno: %d)\n",
823 device->fd, readSize, bufferSize, capacity, errno);
824 deviceChanged = true;
825 closeDeviceLocked(device);
826 } else if (readSize < 0) {
827 if (errno != EAGAIN && errno != EINTR) {
828 ALOGW("could not get event (errno=%d)", errno);
830 } else if ((readSize % sizeof(struct input_event)) != 0) {
831 ALOGE("could not get event (wrong size: %d)", readSize);
833 int32_t deviceId = device->id == mBuiltInKeyboardId ? 0 : device->id;
835 size_t count = size_t(readSize) / sizeof(struct input_event);
836 for (size_t i = 0; i < count; i++) {
837 struct input_event& iev = readBuffer[i];
838 ALOGV("%s got: time=%d.%06d, type=%d, code=%d, value=%d",
839 device->path.string(),
840 (int) iev.time.tv_sec, (int) iev.time.tv_usec,
841 iev.type, iev.code, iev.value);
843 // Some input devices may have a better concept of the time
844 // when an input event was actually generated than the kernel
845 // which simply timestamps all events on entry to evdev.
846 // This is a custom Android extension of the input protocol
847 // mainly intended for use with uinput based device drivers.
848 if (iev.type == EV_MSC) {
849 if (iev.code == MSC_ANDROID_TIME_SEC) {
850 device->timestampOverrideSec = iev.value;
852 } else if (iev.code == MSC_ANDROID_TIME_USEC) {
853 device->timestampOverrideUsec = iev.value;
857 if (device->timestampOverrideSec || device->timestampOverrideUsec) {
858 iev.time.tv_sec = device->timestampOverrideSec;
859 iev.time.tv_usec = device->timestampOverrideUsec;
860 if (iev.type == EV_SYN && iev.code == SYN_REPORT) {
861 device->timestampOverrideSec = 0;
862 device->timestampOverrideUsec = 0;
864 ALOGV("applied override time %d.%06d",
865 int(iev.time.tv_sec), int(iev.time.tv_usec));
868 // Use the time specified in the event instead of the current time
869 // so that downstream code can get more accurate estimates of
870 // event dispatch latency from the time the event is enqueued onto
871 // the evdev client buffer.
873 // The event's timestamp fortuitously uses the same monotonic clock
874 // time base as the rest of Android. The kernel event device driver
875 // (drivers/input/evdev.c) obtains timestamps using ktime_get_ts().
876 // The systemTime(SYSTEM_TIME_MONOTONIC) function we use everywhere
877 // calls clock_gettime(CLOCK_MONOTONIC) which is implemented as a
878 // system call that also queries ktime_get_ts().
879 event->when = nsecs_t(iev.time.tv_sec) * 1000000000LL
880 + nsecs_t(iev.time.tv_usec) * 1000LL;
881 ALOGV("event time %" PRId64 ", now %" PRId64, event->when, now);
883 // Bug 7291243: Add a guard in case the kernel generates timestamps
884 // that appear to be far into the future because they were generated
885 // using the wrong clock source.
887 // This can happen because when the input device is initially opened
888 // it has a default clock source of CLOCK_REALTIME. Any input events
889 // enqueued right after the device is opened will have timestamps
890 // generated using CLOCK_REALTIME. We later set the clock source
891 // to CLOCK_MONOTONIC but it is already too late.
893 // Invalid input event timestamps can result in ANRs, crashes and
894 // and other issues that are hard to track down. We must not let them
895 // propagate through the system.
897 // Log a warning so that we notice the problem and recover gracefully.
898 if (event->when >= now + 10 * 1000000000LL) {
899 // Double-check. Time may have moved on.
900 nsecs_t time = systemTime(SYSTEM_TIME_MONOTONIC);
901 if (event->when > time) {
902 ALOGW("An input event from %s has a timestamp that appears to "
903 "have been generated using the wrong clock source "
904 "(expected CLOCK_MONOTONIC): "
905 "event time %" PRId64 ", current time %" PRId64
906 ", call time %" PRId64 ". "
907 "Using current time instead.",
908 device->path.string(), event->when, time, now);
911 ALOGV("Event time is ok but failed the fast path and required "
912 "an extra call to systemTime: "
913 "event time %" PRId64 ", current time %" PRId64
914 ", call time %" PRId64 ".",
915 event->when, time, now);
918 event->deviceId = deviceId;
919 event->type = iev.type;
920 event->code = iev.code;
921 event->value = iev.value;
926 // The result buffer is full. Reset the pending event index
927 // so we will try to read the device again on the next iteration.
928 mPendingEventIndex -= 1;
932 } else if (eventItem.events & EPOLLHUP) {
933 ALOGI("Removing device %s due to epoll hang-up event.",
934 device->identifier.name.string());
935 deviceChanged = true;
936 closeDeviceLocked(device);
938 ALOGW("Received unexpected epoll event 0x%08x for device %s.",
939 eventItem.events, device->identifier.name.string());
943 // readNotify() will modify the list of devices so this must be done after
944 // processing all other events to ensure that we read all remaining events
945 // before closing the devices.
946 if (mPendingINotify && mPendingEventIndex >= mPendingEventCount) {
947 mPendingINotify = false;
949 deviceChanged = true;
952 // Report added or removed devices immediately.
957 // Return now if we have collected any events or if we were explicitly awoken.
958 if (event != buffer || awoken) {
962 // Poll for events. Mind the wake lock dance!
963 // We hold a wake lock at all times except during epoll_wait(). This works due to some
964 // subtle choreography. When a device driver has pending (unread) events, it acquires
965 // a kernel wake lock. However, once the last pending event has been read, the device
966 // driver will release the kernel wake lock. To prevent the system from going to sleep
967 // when this happens, the EventHub holds onto its own user wake lock while the client
968 // is processing events. Thus the system can only sleep if there are no events
969 // pending or currently being processed.
971 // The timeout is advisory only. If the device is asleep, it will not wake just to
972 // service the timeout.
973 mPendingEventIndex = 0;
975 mLock.unlock(); // release lock before poll, must be before release_wake_lock
976 release_wake_lock(WAKE_LOCK_ID);
978 int pollResult = epoll_wait(mEpollFd, mPendingEventItems, EPOLL_MAX_EVENTS, timeoutMillis);
980 acquire_wake_lock(PARTIAL_WAKE_LOCK, WAKE_LOCK_ID);
981 mLock.lock(); // reacquire lock after poll, must be after acquire_wake_lock
983 if (pollResult == 0) {
985 mPendingEventCount = 0;
989 if (pollResult < 0) {
990 // An error occurred.
991 mPendingEventCount = 0;
993 // Sleep after errors to avoid locking up the system.
994 // Hopefully the error is transient.
995 if (errno != EINTR) {
996 ALOGW("poll failed (errno=%d)\n", errno);
1000 // Some events occurred.
1001 mPendingEventCount = size_t(pollResult);
1005 // All done, return the number of events we read.
1006 return event - buffer;
1009 void EventHub::wake() {
1010 ALOGV("wake() called");
1014 nWrite = write(mWakeWritePipeFd, "W", 1);
1015 } while (nWrite == -1 && errno == EINTR);
1017 if (nWrite != 1 && errno != EAGAIN) {
1018 ALOGW("Could not write wake signal, errno=%d", errno);
1022 void EventHub::scanDevicesLocked() {
1023 status_t res = scanDirLocked(DEVICE_PATH);
1025 ALOGE("scan dir failed for %s\n", DEVICE_PATH);
1027 if (mDevices.indexOfKey(VIRTUAL_KEYBOARD_ID) < 0) {
1028 createVirtualKeyboardLocked();
1032 // ----------------------------------------------------------------------------
1034 static bool containsNonZeroByte(const uint8_t* array, uint32_t startIndex, uint32_t endIndex) {
1035 const uint8_t* end = array + endIndex;
1036 array += startIndex;
1037 while (array != end) {
1038 if (*(array++) != 0) {
1045 static const int32_t GAMEPAD_KEYCODES[] = {
1046 AKEYCODE_BUTTON_A, AKEYCODE_BUTTON_B, AKEYCODE_BUTTON_C,
1047 AKEYCODE_BUTTON_X, AKEYCODE_BUTTON_Y, AKEYCODE_BUTTON_Z,
1048 AKEYCODE_BUTTON_L1, AKEYCODE_BUTTON_R1,
1049 AKEYCODE_BUTTON_L2, AKEYCODE_BUTTON_R2,
1050 AKEYCODE_BUTTON_THUMBL, AKEYCODE_BUTTON_THUMBR,
1051 AKEYCODE_BUTTON_START, AKEYCODE_BUTTON_SELECT, AKEYCODE_BUTTON_MODE,
1054 status_t EventHub::openDeviceLocked(const char *devicePath) {
1057 ALOGV("Opening device: %s", devicePath);
1059 int fd = open(devicePath, O_RDWR | O_CLOEXEC);
1061 ALOGE("could not open %s, %s\n", devicePath, strerror(errno));
1065 InputDeviceIdentifier identifier;
1068 if(ioctl(fd, EVIOCGNAME(sizeof(buffer) - 1), &buffer) < 1) {
1069 //fprintf(stderr, "could not get device name for %s, %s\n", devicePath, strerror(errno));
1071 buffer[sizeof(buffer) - 1] = '\0';
1072 identifier.name.setTo(buffer);
1075 // Check to see if the device is on our excluded list
1076 for (size_t i = 0; i < mExcludedDevices.size(); i++) {
1077 const String8& item = mExcludedDevices.itemAt(i);
1078 if (identifier.name == item) {
1079 ALOGI("ignoring event id %s driver %s\n", devicePath, item.string());
1085 // Get device driver version.
1087 if(ioctl(fd, EVIOCGVERSION, &driverVersion)) {
1088 ALOGE("could not get driver version for %s, %s\n", devicePath, strerror(errno));
1093 // Get device identifier.
1094 struct input_id inputId;
1095 if(ioctl(fd, EVIOCGID, &inputId)) {
1096 ALOGE("could not get device input id for %s, %s\n", devicePath, strerror(errno));
1100 identifier.bus = inputId.bustype;
1101 identifier.product = inputId.product;
1102 identifier.vendor = inputId.vendor;
1103 identifier.version = inputId.version;
1105 // Get device physical location.
1106 if(ioctl(fd, EVIOCGPHYS(sizeof(buffer) - 1), &buffer) < 1) {
1107 //fprintf(stderr, "could not get location for %s, %s\n", devicePath, strerror(errno));
1109 buffer[sizeof(buffer) - 1] = '\0';
1110 identifier.location.setTo(buffer);
1113 // Get device unique id.
1114 if(ioctl(fd, EVIOCGUNIQ(sizeof(buffer) - 1), &buffer) < 1) {
1115 //fprintf(stderr, "could not get idstring for %s, %s\n", devicePath, strerror(errno));
1117 buffer[sizeof(buffer) - 1] = '\0';
1118 identifier.uniqueId.setTo(buffer);
1121 // Fill in the descriptor.
1122 assignDescriptorLocked(identifier);
1124 // Make file descriptor non-blocking for use with poll().
1125 if (fcntl(fd, F_SETFL, O_NONBLOCK)) {
1126 ALOGE("Error %d making device file descriptor non-blocking.", errno);
1131 // Allocate device. (The device object takes ownership of the fd at this point.)
1132 int32_t deviceId = mNextDeviceId++;
1133 Device* device = new Device(fd, deviceId, String8(devicePath), identifier);
1135 ALOGV("add device %d: %s\n", deviceId, devicePath);
1136 ALOGV(" bus: %04x\n"
1140 identifier.bus, identifier.vendor, identifier.product, identifier.version);
1141 ALOGV(" name: \"%s\"\n", identifier.name.string());
1142 ALOGV(" location: \"%s\"\n", identifier.location.string());
1143 ALOGV(" unique id: \"%s\"\n", identifier.uniqueId.string());
1144 ALOGV(" descriptor: \"%s\"\n", identifier.descriptor.string());
1145 ALOGV(" driver: v%d.%d.%d\n",
1146 driverVersion >> 16, (driverVersion >> 8) & 0xff, driverVersion & 0xff);
1148 // Load the configuration file for the device.
1149 loadConfigurationLocked(device);
1151 // Figure out the kinds of events the device reports.
1152 ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(device->keyBitmask)), device->keyBitmask);
1153 ioctl(fd, EVIOCGBIT(EV_ABS, sizeof(device->absBitmask)), device->absBitmask);
1154 ioctl(fd, EVIOCGBIT(EV_REL, sizeof(device->relBitmask)), device->relBitmask);
1155 ioctl(fd, EVIOCGBIT(EV_SW, sizeof(device->swBitmask)), device->swBitmask);
1156 ioctl(fd, EVIOCGBIT(EV_LED, sizeof(device->ledBitmask)), device->ledBitmask);
1157 ioctl(fd, EVIOCGBIT(EV_FF, sizeof(device->ffBitmask)), device->ffBitmask);
1158 ioctl(fd, EVIOCGPROP(sizeof(device->propBitmask)), device->propBitmask);
1160 // See if this is a keyboard. Ignore everything in the button range except for
1161 // joystick and gamepad buttons which are handled like keyboards for the most part.
1162 bool haveKeyboardKeys = containsNonZeroByte(device->keyBitmask, 0, sizeof_bit_array(BTN_MISC))
1163 || containsNonZeroByte(device->keyBitmask, sizeof_bit_array(KEY_OK),
1164 sizeof_bit_array(KEY_MAX + 1));
1165 bool haveGamepadButtons = containsNonZeroByte(device->keyBitmask, sizeof_bit_array(BTN_MISC),
1166 sizeof_bit_array(BTN_MOUSE))
1167 || containsNonZeroByte(device->keyBitmask, sizeof_bit_array(BTN_JOYSTICK),
1168 sizeof_bit_array(BTN_DIGI));
1169 if (haveKeyboardKeys || haveGamepadButtons) {
1170 device->classes |= INPUT_DEVICE_CLASS_KEYBOARD;
1173 // See if this is a cursor device such as a trackball or mouse.
1174 if (test_bit(BTN_MOUSE, device->keyBitmask)
1175 && test_bit(REL_X, device->relBitmask)
1176 && test_bit(REL_Y, device->relBitmask)) {
1177 device->classes |= INPUT_DEVICE_CLASS_CURSOR;
1180 // See if this is a touch pad.
1181 // Is this a new modern multi-touch driver?
1182 if (test_bit(ABS_MT_POSITION_X, device->absBitmask)
1183 && test_bit(ABS_MT_POSITION_Y, device->absBitmask)) {
1184 // Some joysticks such as the PS3 controller report axes that conflict
1185 // with the ABS_MT range. Try to confirm that the device really is
1187 if (test_bit(BTN_TOUCH, device->keyBitmask) || !haveGamepadButtons) {
1188 device->classes |= INPUT_DEVICE_CLASS_TOUCH | INPUT_DEVICE_CLASS_TOUCH_MT;
1190 // Is this an old style single-touch driver?
1191 } else if (test_bit(BTN_TOUCH, device->keyBitmask)
1192 && test_bit(ABS_X, device->absBitmask)
1193 && test_bit(ABS_Y, device->absBitmask)) {
1194 device->classes |= INPUT_DEVICE_CLASS_TOUCH;
1195 // Is this a BT stylus?
1196 } else if ((test_bit(ABS_PRESSURE, device->absBitmask) ||
1197 test_bit(BTN_TOUCH, device->keyBitmask))
1198 && !test_bit(ABS_X, device->absBitmask)
1199 && !test_bit(ABS_Y, device->absBitmask)) {
1200 device->classes |= INPUT_DEVICE_CLASS_EXTERNAL_STYLUS;
1201 // Keyboard will try to claim some of the buttons but we really want to reserve those so we
1202 // can fuse it with the touch screen data, so just take them back. Note this means an
1203 // external stylus cannot also be a keyboard device.
1204 device->classes &= ~INPUT_DEVICE_CLASS_KEYBOARD;
1207 // See if this device is a joystick.
1208 // Assumes that joysticks always have gamepad buttons in order to distinguish them
1209 // from other devices such as accelerometers that also have absolute axes.
1210 if (haveGamepadButtons) {
1211 uint32_t assumedClasses = device->classes | INPUT_DEVICE_CLASS_JOYSTICK;
1212 for (int i = 0; i <= ABS_MAX; i++) {
1213 if (test_bit(i, device->absBitmask)
1214 && (getAbsAxisUsage(i, assumedClasses) & INPUT_DEVICE_CLASS_JOYSTICK)) {
1215 device->classes = assumedClasses;
1221 // Check whether this device has switches.
1222 for (int i = 0; i <= SW_MAX; i++) {
1223 if (test_bit(i, device->swBitmask)) {
1224 device->classes |= INPUT_DEVICE_CLASS_SWITCH;
1229 // Check whether this device supports the vibrator.
1230 if (test_bit(FF_RUMBLE, device->ffBitmask)) {
1231 device->classes |= INPUT_DEVICE_CLASS_VIBRATOR;
1234 // Configure virtual keys.
1235 if ((device->classes & INPUT_DEVICE_CLASS_TOUCH)) {
1236 // Load the virtual keys for the touch screen, if any.
1237 // We do this now so that we can make sure to load the keymap if necessary.
1238 status_t status = loadVirtualKeyMapLocked(device);
1240 device->classes |= INPUT_DEVICE_CLASS_KEYBOARD;
1244 // Load the key map.
1245 // We need to do this for joysticks too because the key layout may specify axes.
1246 status_t keyMapStatus = NAME_NOT_FOUND;
1247 if (device->classes & (INPUT_DEVICE_CLASS_KEYBOARD | INPUT_DEVICE_CLASS_JOYSTICK)) {
1248 // Load the keymap for the device.
1249 keyMapStatus = loadKeyMapLocked(device);
1252 // Configure the keyboard, gamepad or virtual keyboard.
1253 if (device->classes & INPUT_DEVICE_CLASS_KEYBOARD) {
1254 // Register the keyboard as a built-in keyboard if it is eligible.
1256 && mBuiltInKeyboardId == NO_BUILT_IN_KEYBOARD
1257 && isEligibleBuiltInKeyboard(device->identifier,
1258 device->configuration, &device->keyMap)) {
1259 mBuiltInKeyboardId = device->id;
1262 // 'Q' key support = cheap test of whether this is an alpha-capable kbd
1263 if (hasKeycodeLocked(device, AKEYCODE_Q)) {
1264 device->classes |= INPUT_DEVICE_CLASS_ALPHAKEY;
1267 // See if this device has a DPAD.
1268 if (hasKeycodeLocked(device, AKEYCODE_DPAD_UP) &&
1269 hasKeycodeLocked(device, AKEYCODE_DPAD_DOWN) &&
1270 hasKeycodeLocked(device, AKEYCODE_DPAD_LEFT) &&
1271 hasKeycodeLocked(device, AKEYCODE_DPAD_RIGHT) &&
1272 hasKeycodeLocked(device, AKEYCODE_DPAD_CENTER)) {
1273 device->classes |= INPUT_DEVICE_CLASS_DPAD;
1276 // See if this device has a gamepad.
1277 for (size_t i = 0; i < sizeof(GAMEPAD_KEYCODES)/sizeof(GAMEPAD_KEYCODES[0]); i++) {
1278 if (hasKeycodeLocked(device, GAMEPAD_KEYCODES[i])) {
1279 device->classes |= INPUT_DEVICE_CLASS_GAMEPAD;
1284 // Disable kernel key repeat since we handle it ourselves
1285 unsigned int repeatRate[] = {0,0};
1286 if (ioctl(fd, EVIOCSREP, repeatRate)) {
1287 ALOGW("Unable to disable kernel key repeat for %s: %s", devicePath, strerror(errno));
1291 // If the device isn't recognized as something we handle, don't monitor it.
1292 if (device->classes == 0) {
1293 ALOGV("Dropping device: id=%d, path='%s', name='%s'",
1294 deviceId, devicePath, device->identifier.name.string());
1299 // Determine whether the device has a mic.
1300 if (deviceHasMicLocked(device)) {
1301 device->classes |= INPUT_DEVICE_CLASS_MIC;
1304 // Determine whether the device is external or internal.
1305 if (isExternalDeviceLocked(device)) {
1306 device->classes |= INPUT_DEVICE_CLASS_EXTERNAL;
1309 if (device->classes & (INPUT_DEVICE_CLASS_JOYSTICK | INPUT_DEVICE_CLASS_DPAD)
1310 && device->classes & INPUT_DEVICE_CLASS_GAMEPAD) {
1311 device->controllerNumber = getNextControllerNumberLocked(device);
1312 setLedForController(device);
1315 // Register with epoll.
1316 struct epoll_event eventItem;
1317 memset(&eventItem, 0, sizeof(eventItem));
1318 eventItem.events = EPOLLIN;
1319 if (mUsingEpollWakeup) {
1320 eventItem.events |= EPOLLWAKEUP;
1322 eventItem.data.u32 = deviceId;
1323 if (epoll_ctl(mEpollFd, EPOLL_CTL_ADD, fd, &eventItem)) {
1324 ALOGE("Could not add device fd to epoll instance. errno=%d", errno);
1329 String8 wakeMechanism("EPOLLWAKEUP");
1330 if (!mUsingEpollWakeup) {
1331 #ifndef EVIOCSSUSPENDBLOCK
1332 // uapi headers don't include EVIOCSSUSPENDBLOCK, and future kernels
1333 // will use an epoll flag instead, so as long as we want to support
1334 // this feature, we need to be prepared to define the ioctl ourselves.
1335 #define EVIOCSSUSPENDBLOCK _IOW('E', 0x91, int)
1337 if (ioctl(fd, EVIOCSSUSPENDBLOCK, 1)) {
1338 wakeMechanism = "<none>";
1340 wakeMechanism = "EVIOCSSUSPENDBLOCK";
1344 // Tell the kernel that we want to use the monotonic clock for reporting timestamps
1345 // associated with input events. This is important because the input system
1346 // uses the timestamps extensively and assumes they were recorded using the monotonic
1349 // In older kernel, before Linux 3.4, there was no way to tell the kernel which
1350 // clock to use to input event timestamps. The standard kernel behavior was to
1351 // record a real time timestamp, which isn't what we want. Android kernels therefore
1352 // contained a patch to the evdev_event() function in drivers/input/evdev.c to
1353 // replace the call to do_gettimeofday() with ktime_get_ts() to cause the monotonic
1354 // clock to be used instead of the real time clock.
1356 // As of Linux 3.4, there is a new EVIOCSCLOCKID ioctl to set the desired clock.
1357 // Therefore, we no longer require the Android-specific kernel patch described above
1358 // as long as we make sure to set select the monotonic clock. We do that here.
1359 int clockId = CLOCK_MONOTONIC;
1360 bool usingClockIoctl = !ioctl(fd, EVIOCSCLOCKID, &clockId);
1362 ALOGI("New device: id=%d, fd=%d, path='%s', name='%s', classes=0x%x, "
1363 "configuration='%s', keyLayout='%s', keyCharacterMap='%s', builtinKeyboard=%s, "
1364 "wakeMechanism=%s, usingClockIoctl=%s",
1365 deviceId, fd, devicePath, device->identifier.name.string(),
1367 device->configurationFile.string(),
1368 device->keyMap.keyLayoutFile.string(),
1369 device->keyMap.keyCharacterMapFile.string(),
1370 toString(mBuiltInKeyboardId == deviceId),
1371 wakeMechanism.string(), toString(usingClockIoctl));
1373 addDeviceLocked(device);
1377 void EventHub::createVirtualKeyboardLocked() {
1378 InputDeviceIdentifier identifier;
1379 identifier.name = "Virtual";
1380 identifier.uniqueId = "<virtual>";
1381 assignDescriptorLocked(identifier);
1383 Device* device = new Device(-1, VIRTUAL_KEYBOARD_ID, String8("<virtual>"), identifier);
1384 device->classes = INPUT_DEVICE_CLASS_KEYBOARD
1385 | INPUT_DEVICE_CLASS_ALPHAKEY
1386 | INPUT_DEVICE_CLASS_DPAD
1387 | INPUT_DEVICE_CLASS_VIRTUAL;
1388 loadKeyMapLocked(device);
1389 addDeviceLocked(device);
1392 void EventHub::addDeviceLocked(Device* device) {
1393 mDevices.add(device->id, device);
1394 device->next = mOpeningDevices;
1395 mOpeningDevices = device;
1398 void EventHub::loadConfigurationLocked(Device* device) {
1399 device->configurationFile = getInputDeviceConfigurationFilePathByDeviceIdentifier(
1400 device->identifier, INPUT_DEVICE_CONFIGURATION_FILE_TYPE_CONFIGURATION);
1401 if (device->configurationFile.isEmpty()) {
1402 ALOGD("No input device configuration file found for device '%s'.",
1403 device->identifier.name.string());
1405 status_t status = PropertyMap::load(device->configurationFile,
1406 &device->configuration);
1408 ALOGE("Error loading input device configuration file for device '%s'. "
1409 "Using default configuration.",
1410 device->identifier.name.string());
1415 status_t EventHub::loadVirtualKeyMapLocked(Device* device) {
1416 // The virtual key map is supplied by the kernel as a system board property file.
1418 path.append("/sys/board_properties/virtualkeys.");
1419 path.append(device->identifier.name);
1420 if (access(path.string(), R_OK)) {
1421 return NAME_NOT_FOUND;
1423 return VirtualKeyMap::load(path, &device->virtualKeyMap);
1426 status_t EventHub::loadKeyMapLocked(Device* device) {
1427 return device->keyMap.load(device->identifier, device->configuration);
1430 bool EventHub::isExternalDeviceLocked(Device* device) {
1431 if (device->configuration) {
1433 if (device->configuration->tryGetProperty(String8("device.internal"), value)) {
1437 return device->identifier.bus == BUS_USB || device->identifier.bus == BUS_BLUETOOTH;
1440 bool EventHub::deviceHasMicLocked(Device* device) {
1441 if (device->configuration) {
1443 if (device->configuration->tryGetProperty(String8("audio.mic"), value)) {
1450 int32_t EventHub::getNextControllerNumberLocked(Device* device) {
1451 if (mControllerNumbers.isFull()) {
1452 ALOGI("Maximum number of controllers reached, assigning controller number 0 to device %s",
1453 device->identifier.name.string());
1456 // Since the controller number 0 is reserved for non-controllers, translate all numbers up by
1458 return static_cast<int32_t>(mControllerNumbers.markFirstUnmarkedBit() + 1);
1461 void EventHub::releaseControllerNumberLocked(Device* device) {
1462 int32_t num = device->controllerNumber;
1463 device->controllerNumber= 0;
1467 mControllerNumbers.clearBit(static_cast<uint32_t>(num - 1));
1470 void EventHub::setLedForController(Device* device) {
1471 for (int i = 0; i < MAX_CONTROLLER_LEDS; i++) {
1472 setLedStateLocked(device, ALED_CONTROLLER_1 + i, device->controllerNumber == i + 1);
1476 bool EventHub::hasKeycodeLocked(Device* device, int keycode) const {
1477 if (!device->keyMap.haveKeyLayout()) {
1481 Vector<int32_t> scanCodes;
1482 device->keyMap.keyLayoutMap->findScanCodesForKey(keycode, &scanCodes);
1483 const size_t N = scanCodes.size();
1484 for (size_t i=0; i<N && i<=KEY_MAX; i++) {
1485 int32_t sc = scanCodes.itemAt(i);
1486 if (sc >= 0 && sc <= KEY_MAX && test_bit(sc, device->keyBitmask)) {
1494 status_t EventHub::mapLed(Device* device, int32_t led, int32_t* outScanCode) const {
1495 if (!device->keyMap.haveKeyLayout()) {
1496 return NAME_NOT_FOUND;
1500 if(device->keyMap.keyLayoutMap->findScanCodeForLed(led, &scanCode) != NAME_NOT_FOUND) {
1501 if(scanCode >= 0 && scanCode <= LED_MAX && test_bit(scanCode, device->ledBitmask)) {
1502 *outScanCode = scanCode;
1506 return NAME_NOT_FOUND;
1509 status_t EventHub::closeDeviceByPathLocked(const char *devicePath) {
1510 Device* device = getDeviceByPathLocked(devicePath);
1512 closeDeviceLocked(device);
1515 ALOGV("Remove device: %s not found, device may already have been removed.", devicePath);
1519 void EventHub::closeAllDevicesLocked() {
1520 while (mDevices.size() > 0) {
1521 closeDeviceLocked(mDevices.valueAt(mDevices.size() - 1));
1525 void EventHub::closeDeviceLocked(Device* device) {
1526 ALOGI("Removed device: path=%s name=%s id=%d fd=%d classes=0x%x\n",
1527 device->path.string(), device->identifier.name.string(), device->id,
1528 device->fd, device->classes);
1530 if (device->id == mBuiltInKeyboardId) {
1531 ALOGW("built-in keyboard device %s (id=%d) is closing! the apps will not like this",
1532 device->path.string(), mBuiltInKeyboardId);
1533 mBuiltInKeyboardId = NO_BUILT_IN_KEYBOARD;
1536 if (!device->isVirtual()) {
1537 if (epoll_ctl(mEpollFd, EPOLL_CTL_DEL, device->fd, NULL)) {
1538 ALOGW("Could not remove device fd from epoll instance. errno=%d", errno);
1542 releaseControllerNumberLocked(device);
1544 mDevices.removeItem(device->id);
1547 // Unlink for opening devices list if it is present.
1548 Device* pred = NULL;
1550 for (Device* entry = mOpeningDevices; entry != NULL; ) {
1551 if (entry == device) {
1556 entry = entry->next;
1559 // Unlink the device from the opening devices list then delete it.
1560 // We don't need to tell the client that the device was closed because
1561 // it does not even know it was opened in the first place.
1562 ALOGI("Device %s was immediately closed after opening.", device->path.string());
1564 pred->next = device->next;
1566 mOpeningDevices = device->next;
1570 // Link into closing devices list.
1571 // The device will be deleted later after we have informed the client.
1572 device->next = mClosingDevices;
1573 mClosingDevices = device;
1577 status_t EventHub::readNotifyLocked() {
1579 char devname[PATH_MAX];
1581 char event_buf[512];
1584 struct inotify_event *event;
1586 ALOGV("EventHub::readNotify nfd: %d\n", mINotifyFd);
1587 res = read(mINotifyFd, event_buf, sizeof(event_buf));
1588 if(res < (int)sizeof(*event)) {
1591 ALOGW("could not get event, %s\n", strerror(errno));
1594 //printf("got %d bytes of event information\n", res);
1596 strcpy(devname, DEVICE_PATH);
1597 filename = devname + strlen(devname);
1600 while(res >= (int)sizeof(*event)) {
1601 event = (struct inotify_event *)(event_buf + event_pos);
1602 //printf("%d: %08x \"%s\"\n", event->wd, event->mask, event->len ? event->name : "");
1604 strcpy(filename, event->name);
1605 if(event->mask & IN_CREATE) {
1606 openDeviceLocked(devname);
1608 ALOGI("Removing device '%s' due to inotify event\n", devname);
1609 closeDeviceByPathLocked(devname);
1612 event_size = sizeof(*event) + event->len;
1614 event_pos += event_size;
1619 status_t EventHub::scanDirLocked(const char *dirname)
1621 char devname[PATH_MAX];
1625 dir = opendir(dirname);
1628 strcpy(devname, dirname);
1629 filename = devname + strlen(devname);
1631 while((de = readdir(dir))) {
1632 if(de->d_name[0] == '.' &&
1633 (de->d_name[1] == '\0' ||
1634 (de->d_name[1] == '.' && de->d_name[2] == '\0')))
1636 strcpy(filename, de->d_name);
1637 openDeviceLocked(devname);
1643 void EventHub::requestReopenDevices() {
1644 ALOGV("requestReopenDevices() called");
1646 AutoMutex _l(mLock);
1647 mNeedToReopenDevices = true;
1650 void EventHub::dump(String8& dump) {
1651 dump.append("Event Hub State:\n");
1654 AutoMutex _l(mLock);
1656 dump.appendFormat(INDENT "BuiltInKeyboardId: %d\n", mBuiltInKeyboardId);
1658 dump.append(INDENT "Devices:\n");
1660 for (size_t i = 0; i < mDevices.size(); i++) {
1661 const Device* device = mDevices.valueAt(i);
1662 if (mBuiltInKeyboardId == device->id) {
1663 dump.appendFormat(INDENT2 "%d: %s (aka device 0 - built-in keyboard)\n",
1664 device->id, device->identifier.name.string());
1666 dump.appendFormat(INDENT2 "%d: %s\n", device->id,
1667 device->identifier.name.string());
1669 dump.appendFormat(INDENT3 "Classes: 0x%08x\n", device->classes);
1670 dump.appendFormat(INDENT3 "Path: %s\n", device->path.string());
1671 dump.appendFormat(INDENT3 "Descriptor: %s\n", device->identifier.descriptor.string());
1672 dump.appendFormat(INDENT3 "Location: %s\n", device->identifier.location.string());
1673 dump.appendFormat(INDENT3 "ControllerNumber: %d\n", device->controllerNumber);
1674 dump.appendFormat(INDENT3 "UniqueId: %s\n", device->identifier.uniqueId.string());
1675 dump.appendFormat(INDENT3 "Identifier: bus=0x%04x, vendor=0x%04x, "
1676 "product=0x%04x, version=0x%04x\n",
1677 device->identifier.bus, device->identifier.vendor,
1678 device->identifier.product, device->identifier.version);
1679 dump.appendFormat(INDENT3 "KeyLayoutFile: %s\n",
1680 device->keyMap.keyLayoutFile.string());
1681 dump.appendFormat(INDENT3 "KeyCharacterMapFile: %s\n",
1682 device->keyMap.keyCharacterMapFile.string());
1683 dump.appendFormat(INDENT3 "ConfigurationFile: %s\n",
1684 device->configurationFile.string());
1685 dump.appendFormat(INDENT3 "HaveKeyboardLayoutOverlay: %s\n",
1686 toString(device->overlayKeyMap != NULL));
1691 void EventHub::monitor() {
1692 // Acquire and release the lock to ensure that the event hub has not deadlocked.
1698 }; // namespace android