EventHub.cpp revision 9ee285afe740ff13d176c9d8430979dfd9575a23
1/* 2 * Copyright (C) 2005 The Android Open Source Project 3 * 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 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 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. 15 */ 16 17#define LOG_TAG "EventHub" 18 19// #define LOG_NDEBUG 0 20 21#include "EventHub.h" 22 23#include <hardware_legacy/power.h> 24 25#include <cutils/properties.h> 26#include <utils/Log.h> 27#include <utils/Timers.h> 28#include <utils/threads.h> 29#include <utils/Errors.h> 30 31#include <stdlib.h> 32#include <stdio.h> 33#include <unistd.h> 34#include <fcntl.h> 35#include <memory.h> 36#include <errno.h> 37#include <assert.h> 38 39#include <ui/KeyLayoutMap.h> 40#include <ui/KeyCharacterMap.h> 41#include <ui/VirtualKeyMap.h> 42 43#include <string.h> 44#include <stdint.h> 45#include <dirent.h> 46 47#include <sys/inotify.h> 48#include <sys/epoll.h> 49#include <sys/ioctl.h> 50#include <sys/limits.h> 51 52/* this macro is used to tell if "bit" is set in "array" 53 * it selects a byte from the array, and does a boolean AND 54 * operation with a byte that only has the relevant bit set. 55 * eg. to check for the 12th bit, we do (array[1] & 1<<4) 56 */ 57#define test_bit(bit, array) (array[bit/8] & (1<<(bit%8))) 58 59/* this macro computes the number of bytes needed to represent a bit array of the specified size */ 60#define sizeof_bit_array(bits) ((bits + 7) / 8) 61 62#define INDENT " " 63#define INDENT2 " " 64#define INDENT3 " " 65 66namespace android { 67 68static const char *WAKE_LOCK_ID = "KeyEvents"; 69static const char *DEVICE_PATH = "/dev/input"; 70 71/* return the larger integer */ 72static inline int max(int v1, int v2) 73{ 74 return (v1 > v2) ? v1 : v2; 75} 76 77static inline const char* toString(bool value) { 78 return value ? "true" : "false"; 79} 80 81// --- Global Functions --- 82 83uint32_t getAbsAxisUsage(int32_t axis, uint32_t deviceClasses) { 84 // Touch devices get dibs on touch-related axes. 85 if (deviceClasses & INPUT_DEVICE_CLASS_TOUCH) { 86 switch (axis) { 87 case ABS_X: 88 case ABS_Y: 89 case ABS_PRESSURE: 90 case ABS_TOOL_WIDTH: 91 case ABS_DISTANCE: 92 case ABS_TILT_X: 93 case ABS_TILT_Y: 94 case ABS_MT_SLOT: 95 case ABS_MT_TOUCH_MAJOR: 96 case ABS_MT_TOUCH_MINOR: 97 case ABS_MT_WIDTH_MAJOR: 98 case ABS_MT_WIDTH_MINOR: 99 case ABS_MT_ORIENTATION: 100 case ABS_MT_POSITION_X: 101 case ABS_MT_POSITION_Y: 102 case ABS_MT_TOOL_TYPE: 103 case ABS_MT_BLOB_ID: 104 case ABS_MT_TRACKING_ID: 105 case ABS_MT_PRESSURE: 106 case ABS_MT_DISTANCE: 107 return INPUT_DEVICE_CLASS_TOUCH; 108 } 109 } 110 111 // Joystick devices get the rest. 112 return deviceClasses & INPUT_DEVICE_CLASS_JOYSTICK; 113} 114 115// --- EventHub::Device --- 116 117EventHub::Device::Device(int fd, int32_t id, const String8& path, 118 const InputDeviceIdentifier& identifier) : 119 next(NULL), 120 fd(fd), id(id), path(path), identifier(identifier), 121 classes(0), configuration(NULL), virtualKeyMap(NULL) { 122 memset(keyBitmask, 0, sizeof(keyBitmask)); 123 memset(absBitmask, 0, sizeof(absBitmask)); 124 memset(relBitmask, 0, sizeof(relBitmask)); 125 memset(swBitmask, 0, sizeof(swBitmask)); 126 memset(ledBitmask, 0, sizeof(ledBitmask)); 127 memset(propBitmask, 0, sizeof(propBitmask)); 128} 129 130EventHub::Device::~Device() { 131 close(); 132 delete configuration; 133 delete virtualKeyMap; 134} 135 136void EventHub::Device::close() { 137 if (fd >= 0) { 138 ::close(fd); 139 fd = -1; 140 } 141} 142 143 144// --- EventHub --- 145 146const uint32_t EventHub::EPOLL_ID_INOTIFY; 147const uint32_t EventHub::EPOLL_ID_WAKE; 148const int EventHub::EPOLL_SIZE_HINT; 149const int EventHub::EPOLL_MAX_EVENTS; 150 151EventHub::EventHub(void) : 152 mBuiltInKeyboardId(-1), mNextDeviceId(1), 153 mOpeningDevices(0), mClosingDevices(0), 154 mNeedToSendFinishedDeviceScan(false), 155 mNeedToReopenDevices(false), mNeedToScanDevices(true), 156 mPendingEventCount(0), mPendingEventIndex(0), mPendingINotify(false) { 157 acquire_wake_lock(PARTIAL_WAKE_LOCK, WAKE_LOCK_ID); 158 159 mNumCpus = sysconf(_SC_NPROCESSORS_ONLN); 160 161 mEpollFd = epoll_create(EPOLL_SIZE_HINT); 162 LOG_ALWAYS_FATAL_IF(mEpollFd < 0, "Could not create epoll instance. errno=%d", errno); 163 164 mINotifyFd = inotify_init(); 165 int result = inotify_add_watch(mINotifyFd, DEVICE_PATH, IN_DELETE | IN_CREATE); 166 LOG_ALWAYS_FATAL_IF(result < 0, "Could not register INotify for %s. errno=%d", 167 DEVICE_PATH, errno); 168 169 struct epoll_event eventItem; 170 memset(&eventItem, 0, sizeof(eventItem)); 171 eventItem.events = EPOLLIN; 172 eventItem.data.u32 = EPOLL_ID_INOTIFY; 173 result = epoll_ctl(mEpollFd, EPOLL_CTL_ADD, mINotifyFd, &eventItem); 174 LOG_ALWAYS_FATAL_IF(result != 0, "Could not add INotify to epoll instance. errno=%d", errno); 175 176 int wakeFds[2]; 177 result = pipe(wakeFds); 178 LOG_ALWAYS_FATAL_IF(result != 0, "Could not create wake pipe. errno=%d", errno); 179 180 mWakeReadPipeFd = wakeFds[0]; 181 mWakeWritePipeFd = wakeFds[1]; 182 183 result = fcntl(mWakeReadPipeFd, F_SETFL, O_NONBLOCK); 184 LOG_ALWAYS_FATAL_IF(result != 0, "Could not make wake read pipe non-blocking. errno=%d", 185 errno); 186 187 result = fcntl(mWakeWritePipeFd, F_SETFL, O_NONBLOCK); 188 LOG_ALWAYS_FATAL_IF(result != 0, "Could not make wake write pipe non-blocking. errno=%d", 189 errno); 190 191 eventItem.data.u32 = EPOLL_ID_WAKE; 192 result = epoll_ctl(mEpollFd, EPOLL_CTL_ADD, mWakeReadPipeFd, &eventItem); 193 LOG_ALWAYS_FATAL_IF(result != 0, "Could not add wake read pipe to epoll instance. errno=%d", 194 errno); 195} 196 197EventHub::~EventHub(void) { 198 closeAllDevicesLocked(); 199 200 while (mClosingDevices) { 201 Device* device = mClosingDevices; 202 mClosingDevices = device->next; 203 delete device; 204 } 205 206 ::close(mEpollFd); 207 ::close(mINotifyFd); 208 ::close(mWakeReadPipeFd); 209 ::close(mWakeWritePipeFd); 210 211 release_wake_lock(WAKE_LOCK_ID); 212} 213 214String8 EventHub::getDeviceName(int32_t deviceId) const { 215 AutoMutex _l(mLock); 216 Device* device = getDeviceLocked(deviceId); 217 if (device == NULL) return String8(); 218 return device->identifier.name; 219} 220 221uint32_t EventHub::getDeviceClasses(int32_t deviceId) const { 222 AutoMutex _l(mLock); 223 Device* device = getDeviceLocked(deviceId); 224 if (device == NULL) return 0; 225 return device->classes; 226} 227 228void EventHub::getConfiguration(int32_t deviceId, PropertyMap* outConfiguration) const { 229 AutoMutex _l(mLock); 230 Device* device = getDeviceLocked(deviceId); 231 if (device && device->configuration) { 232 *outConfiguration = *device->configuration; 233 } else { 234 outConfiguration->clear(); 235 } 236} 237 238status_t EventHub::getAbsoluteAxisInfo(int32_t deviceId, int axis, 239 RawAbsoluteAxisInfo* outAxisInfo) const { 240 outAxisInfo->clear(); 241 242 if (axis >= 0 && axis <= ABS_MAX) { 243 AutoMutex _l(mLock); 244 245 Device* device = getDeviceLocked(deviceId); 246 if (device && test_bit(axis, device->absBitmask)) { 247 struct input_absinfo info; 248 if(ioctl(device->fd, EVIOCGABS(axis), &info)) { 249 LOGW("Error reading absolute controller %d for device %s fd %d, errno=%d", 250 axis, device->identifier.name.string(), device->fd, errno); 251 return -errno; 252 } 253 254 if (info.minimum != info.maximum) { 255 outAxisInfo->valid = true; 256 outAxisInfo->minValue = info.minimum; 257 outAxisInfo->maxValue = info.maximum; 258 outAxisInfo->flat = info.flat; 259 outAxisInfo->fuzz = info.fuzz; 260 outAxisInfo->resolution = info.resolution; 261 } 262 return OK; 263 } 264 } 265 return -1; 266} 267 268bool EventHub::hasRelativeAxis(int32_t deviceId, int axis) const { 269 if (axis >= 0 && axis <= REL_MAX) { 270 AutoMutex _l(mLock); 271 272 Device* device = getDeviceLocked(deviceId); 273 if (device) { 274 return test_bit(axis, device->relBitmask); 275 } 276 } 277 return false; 278} 279 280bool EventHub::hasInputProperty(int32_t deviceId, int property) const { 281 if (property >= 0 && property <= INPUT_PROP_MAX) { 282 AutoMutex _l(mLock); 283 284 Device* device = getDeviceLocked(deviceId); 285 if (device) { 286 return test_bit(property, device->propBitmask); 287 } 288 } 289 return false; 290} 291 292int32_t EventHub::getScanCodeState(int32_t deviceId, int32_t scanCode) const { 293 if (scanCode >= 0 && scanCode <= KEY_MAX) { 294 AutoMutex _l(mLock); 295 296 Device* device = getDeviceLocked(deviceId); 297 if (device && test_bit(scanCode, device->keyBitmask)) { 298 uint8_t keyState[sizeof_bit_array(KEY_MAX + 1)]; 299 memset(keyState, 0, sizeof(keyState)); 300 if (ioctl(device->fd, EVIOCGKEY(sizeof(keyState)), keyState) >= 0) { 301 return test_bit(scanCode, keyState) ? AKEY_STATE_DOWN : AKEY_STATE_UP; 302 } 303 } 304 } 305 return AKEY_STATE_UNKNOWN; 306} 307 308int32_t EventHub::getKeyCodeState(int32_t deviceId, int32_t keyCode) const { 309 AutoMutex _l(mLock); 310 311 Device* device = getDeviceLocked(deviceId); 312 if (device && device->keyMap.haveKeyLayout()) { 313 Vector<int32_t> scanCodes; 314 device->keyMap.keyLayoutMap->findScanCodesForKey(keyCode, &scanCodes); 315 if (scanCodes.size() != 0) { 316 uint8_t keyState[sizeof_bit_array(KEY_MAX + 1)]; 317 memset(keyState, 0, sizeof(keyState)); 318 if (ioctl(device->fd, EVIOCGKEY(sizeof(keyState)), keyState) >= 0) { 319 for (size_t i = 0; i < scanCodes.size(); i++) { 320 int32_t sc = scanCodes.itemAt(i); 321 if (sc >= 0 && sc <= KEY_MAX && test_bit(sc, keyState)) { 322 return AKEY_STATE_DOWN; 323 } 324 } 325 return AKEY_STATE_UP; 326 } 327 } 328 } 329 return AKEY_STATE_UNKNOWN; 330} 331 332int32_t EventHub::getSwitchState(int32_t deviceId, int32_t sw) const { 333 if (sw >= 0 && sw <= SW_MAX) { 334 AutoMutex _l(mLock); 335 336 Device* device = getDeviceLocked(deviceId); 337 if (device && test_bit(sw, device->swBitmask)) { 338 uint8_t swState[sizeof_bit_array(SW_MAX + 1)]; 339 memset(swState, 0, sizeof(swState)); 340 if (ioctl(device->fd, EVIOCGSW(sizeof(swState)), swState) >= 0) { 341 return test_bit(sw, swState) ? AKEY_STATE_DOWN : AKEY_STATE_UP; 342 } 343 } 344 } 345 return AKEY_STATE_UNKNOWN; 346} 347 348status_t EventHub::getAbsoluteAxisValue(int32_t deviceId, int32_t axis, int32_t* outValue) const { 349 *outValue = 0; 350 351 if (axis >= 0 && axis <= ABS_MAX) { 352 AutoMutex _l(mLock); 353 354 Device* device = getDeviceLocked(deviceId); 355 if (device && test_bit(axis, device->absBitmask)) { 356 struct input_absinfo info; 357 if(ioctl(device->fd, EVIOCGABS(axis), &info)) { 358 LOGW("Error reading absolute controller %d for device %s fd %d, errno=%d", 359 axis, device->identifier.name.string(), device->fd, errno); 360 return -errno; 361 } 362 363 *outValue = info.value; 364 return OK; 365 } 366 } 367 return -1; 368} 369 370bool EventHub::markSupportedKeyCodes(int32_t deviceId, size_t numCodes, 371 const int32_t* keyCodes, uint8_t* outFlags) const { 372 AutoMutex _l(mLock); 373 374 Device* device = getDeviceLocked(deviceId); 375 if (device && device->keyMap.haveKeyLayout()) { 376 Vector<int32_t> scanCodes; 377 for (size_t codeIndex = 0; codeIndex < numCodes; codeIndex++) { 378 scanCodes.clear(); 379 380 status_t err = device->keyMap.keyLayoutMap->findScanCodesForKey( 381 keyCodes[codeIndex], &scanCodes); 382 if (! err) { 383 // check the possible scan codes identified by the layout map against the 384 // map of codes actually emitted by the driver 385 for (size_t sc = 0; sc < scanCodes.size(); sc++) { 386 if (test_bit(scanCodes[sc], device->keyBitmask)) { 387 outFlags[codeIndex] = 1; 388 break; 389 } 390 } 391 } 392 } 393 return true; 394 } 395 return false; 396} 397 398status_t EventHub::mapKey(int32_t deviceId, int scancode, 399 int32_t* outKeycode, uint32_t* outFlags) const 400{ 401 AutoMutex _l(mLock); 402 Device* device = getDeviceLocked(deviceId); 403 404 if (device && device->keyMap.haveKeyLayout()) { 405 status_t err = device->keyMap.keyLayoutMap->mapKey(scancode, outKeycode, outFlags); 406 if (err == NO_ERROR) { 407 return NO_ERROR; 408 } 409 } 410 411 if (mBuiltInKeyboardId != -1) { 412 device = getDeviceLocked(mBuiltInKeyboardId); 413 414 if (device && device->keyMap.haveKeyLayout()) { 415 status_t err = device->keyMap.keyLayoutMap->mapKey(scancode, outKeycode, outFlags); 416 if (err == NO_ERROR) { 417 return NO_ERROR; 418 } 419 } 420 } 421 422 *outKeycode = 0; 423 *outFlags = 0; 424 return NAME_NOT_FOUND; 425} 426 427status_t EventHub::mapAxis(int32_t deviceId, int scancode, AxisInfo* outAxisInfo) const 428{ 429 AutoMutex _l(mLock); 430 Device* device = getDeviceLocked(deviceId); 431 432 if (device && device->keyMap.haveKeyLayout()) { 433 status_t err = device->keyMap.keyLayoutMap->mapAxis(scancode, outAxisInfo); 434 if (err == NO_ERROR) { 435 return NO_ERROR; 436 } 437 } 438 439 if (mBuiltInKeyboardId != -1) { 440 device = getDeviceLocked(mBuiltInKeyboardId); 441 442 if (device && device->keyMap.haveKeyLayout()) { 443 status_t err = device->keyMap.keyLayoutMap->mapAxis(scancode, outAxisInfo); 444 if (err == NO_ERROR) { 445 return NO_ERROR; 446 } 447 } 448 } 449 450 return NAME_NOT_FOUND; 451} 452 453void EventHub::setExcludedDevices(const Vector<String8>& devices) { 454 AutoMutex _l(mLock); 455 456 mExcludedDevices = devices; 457} 458 459bool EventHub::hasScanCode(int32_t deviceId, int32_t scanCode) const { 460 AutoMutex _l(mLock); 461 Device* device = getDeviceLocked(deviceId); 462 if (device && scanCode >= 0 && scanCode <= KEY_MAX) { 463 if (test_bit(scanCode, device->keyBitmask)) { 464 return true; 465 } 466 } 467 return false; 468} 469 470bool EventHub::hasLed(int32_t deviceId, int32_t led) const { 471 AutoMutex _l(mLock); 472 Device* device = getDeviceLocked(deviceId); 473 if (device && led >= 0 && led <= LED_MAX) { 474 if (test_bit(led, device->ledBitmask)) { 475 return true; 476 } 477 } 478 return false; 479} 480 481void EventHub::setLedState(int32_t deviceId, int32_t led, bool on) { 482 AutoMutex _l(mLock); 483 Device* device = getDeviceLocked(deviceId); 484 if (device && led >= 0 && led <= LED_MAX) { 485 struct input_event ev; 486 ev.time.tv_sec = 0; 487 ev.time.tv_usec = 0; 488 ev.type = EV_LED; 489 ev.code = led; 490 ev.value = on ? 1 : 0; 491 492 ssize_t nWrite; 493 do { 494 nWrite = write(device->fd, &ev, sizeof(struct input_event)); 495 } while (nWrite == -1 && errno == EINTR); 496 } 497} 498 499void EventHub::getVirtualKeyDefinitions(int32_t deviceId, 500 Vector<VirtualKeyDefinition>& outVirtualKeys) const { 501 outVirtualKeys.clear(); 502 503 AutoMutex _l(mLock); 504 Device* device = getDeviceLocked(deviceId); 505 if (device && device->virtualKeyMap) { 506 outVirtualKeys.appendVector(device->virtualKeyMap->getVirtualKeys()); 507 } 508} 509 510EventHub::Device* EventHub::getDeviceLocked(int32_t deviceId) const { 511 if (deviceId == 0) { 512 deviceId = mBuiltInKeyboardId; 513 } 514 ssize_t index = mDevices.indexOfKey(deviceId); 515 return index >= 0 ? mDevices.valueAt(index) : NULL; 516} 517 518EventHub::Device* EventHub::getDeviceByPathLocked(const char* devicePath) const { 519 for (size_t i = 0; i < mDevices.size(); i++) { 520 Device* device = mDevices.valueAt(i); 521 if (device->path == devicePath) { 522 return device; 523 } 524 } 525 return NULL; 526} 527 528size_t EventHub::getEvents(int timeoutMillis, RawEvent* buffer, size_t bufferSize) { 529 LOG_ASSERT(bufferSize >= 1); 530 531 AutoMutex _l(mLock); 532 533 struct input_event readBuffer[bufferSize]; 534 535 RawEvent* event = buffer; 536 size_t capacity = bufferSize; 537 bool awoken = false; 538 for (;;) { 539 nsecs_t now = systemTime(SYSTEM_TIME_MONOTONIC); 540 541 // Reopen input devices if needed. 542 if (mNeedToReopenDevices) { 543 mNeedToReopenDevices = false; 544 545 LOGI("Reopening all input devices due to a configuration change."); 546 547 closeAllDevicesLocked(); 548 mNeedToScanDevices = true; 549 break; // return to the caller before we actually rescan 550 } 551 552 // Report any devices that had last been added/removed. 553 while (mClosingDevices) { 554 Device* device = mClosingDevices; 555 LOGV("Reporting device closed: id=%d, name=%s\n", 556 device->id, device->path.string()); 557 mClosingDevices = device->next; 558 event->when = now; 559 event->deviceId = device->id == mBuiltInKeyboardId ? 0 : device->id; 560 event->type = DEVICE_REMOVED; 561 event += 1; 562 delete device; 563 mNeedToSendFinishedDeviceScan = true; 564 if (--capacity == 0) { 565 break; 566 } 567 } 568 569 if (mNeedToScanDevices) { 570 mNeedToScanDevices = false; 571 scanDevicesLocked(); 572 mNeedToSendFinishedDeviceScan = true; 573 } 574 575 while (mOpeningDevices != NULL) { 576 Device* device = mOpeningDevices; 577 LOGV("Reporting device opened: id=%d, name=%s\n", 578 device->id, device->path.string()); 579 mOpeningDevices = device->next; 580 event->when = now; 581 event->deviceId = device->id == mBuiltInKeyboardId ? 0 : device->id; 582 event->type = DEVICE_ADDED; 583 event += 1; 584 mNeedToSendFinishedDeviceScan = true; 585 if (--capacity == 0) { 586 break; 587 } 588 } 589 590 if (mNeedToSendFinishedDeviceScan) { 591 mNeedToSendFinishedDeviceScan = false; 592 event->when = now; 593 event->type = FINISHED_DEVICE_SCAN; 594 event += 1; 595 if (--capacity == 0) { 596 break; 597 } 598 } 599 600 // Grab the next input event. 601 bool deviceChanged = false; 602 while (mPendingEventIndex < mPendingEventCount) { 603 const struct epoll_event& eventItem = mPendingEventItems[mPendingEventIndex++]; 604 if (eventItem.data.u32 == EPOLL_ID_INOTIFY) { 605 if (eventItem.events & EPOLLIN) { 606 mPendingINotify = true; 607 } else { 608 LOGW("Received unexpected epoll event 0x%08x for INotify.", eventItem.events); 609 } 610 continue; 611 } 612 613 if (eventItem.data.u32 == EPOLL_ID_WAKE) { 614 if (eventItem.events & EPOLLIN) { 615 LOGV("awoken after wake()"); 616 awoken = true; 617 char buffer[16]; 618 ssize_t nRead; 619 do { 620 nRead = read(mWakeReadPipeFd, buffer, sizeof(buffer)); 621 } while ((nRead == -1 && errno == EINTR) || nRead == sizeof(buffer)); 622 } else { 623 LOGW("Received unexpected epoll event 0x%08x for wake read pipe.", 624 eventItem.events); 625 } 626 continue; 627 } 628 629 ssize_t deviceIndex = mDevices.indexOfKey(eventItem.data.u32); 630 if (deviceIndex < 0) { 631 LOGW("Received unexpected epoll event 0x%08x for unknown device id %d.", 632 eventItem.events, eventItem.data.u32); 633 continue; 634 } 635 636 Device* device = mDevices.valueAt(deviceIndex); 637 if (eventItem.events & EPOLLIN) { 638 int32_t readSize = read(device->fd, readBuffer, 639 sizeof(struct input_event) * capacity); 640 if (readSize == 0 || (readSize < 0 && errno == ENODEV)) { 641 // Device was removed before INotify noticed. 642 deviceChanged = true; 643 closeDeviceLocked(device); 644 } else if (readSize < 0) { 645 if (errno != EAGAIN && errno != EINTR) { 646 LOGW("could not get event (errno=%d)", errno); 647 } 648 } else if ((readSize % sizeof(struct input_event)) != 0) { 649 LOGE("could not get event (wrong size: %d)", readSize); 650 } else { 651 int32_t deviceId = device->id == mBuiltInKeyboardId ? 0 : device->id; 652 653 size_t count = size_t(readSize) / sizeof(struct input_event); 654 for (size_t i = 0; i < count; i++) { 655 const struct input_event& iev = readBuffer[i]; 656 LOGV("%s got: t0=%d, t1=%d, type=%d, code=%d, value=%d", 657 device->path.string(), 658 (int) iev.time.tv_sec, (int) iev.time.tv_usec, 659 iev.type, iev.code, iev.value); 660 661#ifdef HAVE_POSIX_CLOCKS 662 // Use the time specified in the event instead of the current time 663 // so that downstream code can get more accurate estimates of 664 // event dispatch latency from the time the event is enqueued onto 665 // the evdev client buffer. 666 // 667 // The event's timestamp fortuitously uses the same monotonic clock 668 // time base as the rest of Android. The kernel event device driver 669 // (drivers/input/evdev.c) obtains timestamps using ktime_get_ts(). 670 // The systemTime(SYSTEM_TIME_MONOTONIC) function we use everywhere 671 // calls clock_gettime(CLOCK_MONOTONIC) which is implemented as a 672 // system call that also queries ktime_get_ts(). 673 event->when = nsecs_t(iev.time.tv_sec) * 1000000000LL 674 + nsecs_t(iev.time.tv_usec) * 1000LL; 675 LOGV("event time %lld, now %lld", event->when, now); 676#else 677 event->when = now; 678#endif 679 event->deviceId = deviceId; 680 event->type = iev.type; 681 event->scanCode = iev.code; 682 event->value = iev.value; 683 event->keyCode = AKEYCODE_UNKNOWN; 684 event->flags = 0; 685 if (iev.type == EV_KEY && device->keyMap.haveKeyLayout()) { 686 status_t err = device->keyMap.keyLayoutMap->mapKey(iev.code, 687 &event->keyCode, &event->flags); 688 LOGV("iev.code=%d keyCode=%d flags=0x%08x err=%d\n", 689 iev.code, event->keyCode, event->flags, err); 690 } 691 event += 1; 692 } 693 capacity -= count; 694 if (capacity == 0) { 695 // The result buffer is full. Reset the pending event index 696 // so we will try to read the device again on the next iteration. 697 mPendingEventIndex -= 1; 698 break; 699 } 700 } 701 } else { 702 LOGW("Received unexpected epoll event 0x%08x for device %s.", 703 eventItem.events, device->identifier.name.string()); 704 } 705 } 706 707 // readNotify() will modify the list of devices so this must be done after 708 // processing all other events to ensure that we read all remaining events 709 // before closing the devices. 710 if (mPendingINotify && mPendingEventIndex >= mPendingEventCount) { 711 mPendingINotify = false; 712 readNotifyLocked(); 713 deviceChanged = true; 714 } 715 716 // Report added or removed devices immediately. 717 if (deviceChanged) { 718 continue; 719 } 720 721 // Return now if we have collected any events or if we were explicitly awoken. 722 if (event != buffer || awoken) { 723 break; 724 } 725 726 // Poll for events. Mind the wake lock dance! 727 // We hold a wake lock at all times except during epoll_wait(). This works due to some 728 // subtle choreography. When a device driver has pending (unread) events, it acquires 729 // a kernel wake lock. However, once the last pending event has been read, the device 730 // driver will release the kernel wake lock. To prevent the system from going to sleep 731 // when this happens, the EventHub holds onto its own user wake lock while the client 732 // is processing events. Thus the system can only sleep if there are no events 733 // pending or currently being processed. 734 // 735 // The timeout is advisory only. If the device is asleep, it will not wake just to 736 // service the timeout. 737 mPendingEventIndex = 0; 738 739 mLock.unlock(); // release lock before poll, must be before release_wake_lock 740 release_wake_lock(WAKE_LOCK_ID); 741 742 int pollResult = epoll_wait(mEpollFd, mPendingEventItems, EPOLL_MAX_EVENTS, timeoutMillis); 743 744 acquire_wake_lock(PARTIAL_WAKE_LOCK, WAKE_LOCK_ID); 745 mLock.lock(); // reacquire lock after poll, must be after acquire_wake_lock 746 747 if (pollResult == 0) { 748 // Timed out. 749 mPendingEventCount = 0; 750 break; 751 } 752 753 if (pollResult < 0) { 754 // An error occurred. 755 mPendingEventCount = 0; 756 757 // Sleep after errors to avoid locking up the system. 758 // Hopefully the error is transient. 759 if (errno != EINTR) { 760 LOGW("poll failed (errno=%d)\n", errno); 761 usleep(100000); 762 } 763 } else { 764 // Some events occurred. 765 mPendingEventCount = size_t(pollResult); 766 767 // On an SMP system, it is possible for the framework to read input events 768 // faster than the kernel input device driver can produce a complete packet. 769 // Because poll() wakes up as soon as the first input event becomes available, 770 // the framework will often end up reading one event at a time until the 771 // packet is complete. Instead of one call to read() returning 71 events, 772 // it could take 71 calls to read() each returning 1 event. 773 // 774 // Sleep for a short period of time after waking up from the poll() to give 775 // the kernel time to finish writing the entire packet of input events. 776 if (mNumCpus > 1) { 777 usleep(250); 778 } 779 } 780 } 781 782 // All done, return the number of events we read. 783 return event - buffer; 784} 785 786void EventHub::wake() { 787 LOGV("wake() called"); 788 789 ssize_t nWrite; 790 do { 791 nWrite = write(mWakeWritePipeFd, "W", 1); 792 } while (nWrite == -1 && errno == EINTR); 793 794 if (nWrite != 1 && errno != EAGAIN) { 795 LOGW("Could not write wake signal, errno=%d", errno); 796 } 797} 798 799void EventHub::scanDevicesLocked() { 800 status_t res = scanDirLocked(DEVICE_PATH); 801 if(res < 0) { 802 LOGE("scan dir failed for %s\n", DEVICE_PATH); 803 } 804} 805 806// ---------------------------------------------------------------------------- 807 808static bool containsNonZeroByte(const uint8_t* array, uint32_t startIndex, uint32_t endIndex) { 809 const uint8_t* end = array + endIndex; 810 array += startIndex; 811 while (array != end) { 812 if (*(array++) != 0) { 813 return true; 814 } 815 } 816 return false; 817} 818 819static const int32_t GAMEPAD_KEYCODES[] = { 820 AKEYCODE_BUTTON_A, AKEYCODE_BUTTON_B, AKEYCODE_BUTTON_C, 821 AKEYCODE_BUTTON_X, AKEYCODE_BUTTON_Y, AKEYCODE_BUTTON_Z, 822 AKEYCODE_BUTTON_L1, AKEYCODE_BUTTON_R1, 823 AKEYCODE_BUTTON_L2, AKEYCODE_BUTTON_R2, 824 AKEYCODE_BUTTON_THUMBL, AKEYCODE_BUTTON_THUMBR, 825 AKEYCODE_BUTTON_START, AKEYCODE_BUTTON_SELECT, AKEYCODE_BUTTON_MODE, 826 AKEYCODE_BUTTON_1, AKEYCODE_BUTTON_2, AKEYCODE_BUTTON_3, AKEYCODE_BUTTON_4, 827 AKEYCODE_BUTTON_5, AKEYCODE_BUTTON_6, AKEYCODE_BUTTON_7, AKEYCODE_BUTTON_8, 828 AKEYCODE_BUTTON_9, AKEYCODE_BUTTON_10, AKEYCODE_BUTTON_11, AKEYCODE_BUTTON_12, 829 AKEYCODE_BUTTON_13, AKEYCODE_BUTTON_14, AKEYCODE_BUTTON_15, AKEYCODE_BUTTON_16, 830}; 831 832status_t EventHub::openDeviceLocked(const char *devicePath) { 833 char buffer[80]; 834 835 LOGV("Opening device: %s", devicePath); 836 837 int fd = open(devicePath, O_RDWR); 838 if(fd < 0) { 839 LOGE("could not open %s, %s\n", devicePath, strerror(errno)); 840 return -1; 841 } 842 843 InputDeviceIdentifier identifier; 844 845 // Get device name. 846 if(ioctl(fd, EVIOCGNAME(sizeof(buffer) - 1), &buffer) < 1) { 847 //fprintf(stderr, "could not get device name for %s, %s\n", devicePath, strerror(errno)); 848 } else { 849 buffer[sizeof(buffer) - 1] = '\0'; 850 identifier.name.setTo(buffer); 851 } 852 853 // Check to see if the device is on our excluded list 854 for (size_t i = 0; i < mExcludedDevices.size(); i++) { 855 const String8& item = mExcludedDevices.itemAt(i); 856 if (identifier.name == item) { 857 LOGI("ignoring event id %s driver %s\n", devicePath, item.string()); 858 close(fd); 859 return -1; 860 } 861 } 862 863 // Get device driver version. 864 int driverVersion; 865 if(ioctl(fd, EVIOCGVERSION, &driverVersion)) { 866 LOGE("could not get driver version for %s, %s\n", devicePath, strerror(errno)); 867 close(fd); 868 return -1; 869 } 870 871 // Get device identifier. 872 struct input_id inputId; 873 if(ioctl(fd, EVIOCGID, &inputId)) { 874 LOGE("could not get device input id for %s, %s\n", devicePath, strerror(errno)); 875 close(fd); 876 return -1; 877 } 878 identifier.bus = inputId.bustype; 879 identifier.product = inputId.product; 880 identifier.vendor = inputId.vendor; 881 identifier.version = inputId.version; 882 883 // Get device physical location. 884 if(ioctl(fd, EVIOCGPHYS(sizeof(buffer) - 1), &buffer) < 1) { 885 //fprintf(stderr, "could not get location for %s, %s\n", devicePath, strerror(errno)); 886 } else { 887 buffer[sizeof(buffer) - 1] = '\0'; 888 identifier.location.setTo(buffer); 889 } 890 891 // Get device unique id. 892 if(ioctl(fd, EVIOCGUNIQ(sizeof(buffer) - 1), &buffer) < 1) { 893 //fprintf(stderr, "could not get idstring for %s, %s\n", devicePath, strerror(errno)); 894 } else { 895 buffer[sizeof(buffer) - 1] = '\0'; 896 identifier.uniqueId.setTo(buffer); 897 } 898 899 // Make file descriptor non-blocking for use with poll(). 900 if (fcntl(fd, F_SETFL, O_NONBLOCK)) { 901 LOGE("Error %d making device file descriptor non-blocking.", errno); 902 close(fd); 903 return -1; 904 } 905 906 // Allocate device. (The device object takes ownership of the fd at this point.) 907 int32_t deviceId = mNextDeviceId++; 908 Device* device = new Device(fd, deviceId, String8(devicePath), identifier); 909 910#if 0 911 LOGI("add device %d: %s\n", deviceId, devicePath); 912 LOGI(" bus: %04x\n" 913 " vendor %04x\n" 914 " product %04x\n" 915 " version %04x\n", 916 identifier.bus, identifier.vendor, identifier.product, identifier.version); 917 LOGI(" name: \"%s\"\n", identifier.name.string()); 918 LOGI(" location: \"%s\"\n", identifier.location.string()); 919 LOGI(" unique id: \"%s\"\n", identifier.uniqueId.string()); 920 LOGI(" driver: v%d.%d.%d\n", 921 driverVersion >> 16, (driverVersion >> 8) & 0xff, driverVersion & 0xff); 922#endif 923 924 // Load the configuration file for the device. 925 loadConfigurationLocked(device); 926 927 // Figure out the kinds of events the device reports. 928 ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(device->keyBitmask)), device->keyBitmask); 929 ioctl(fd, EVIOCGBIT(EV_ABS, sizeof(device->absBitmask)), device->absBitmask); 930 ioctl(fd, EVIOCGBIT(EV_REL, sizeof(device->relBitmask)), device->relBitmask); 931 ioctl(fd, EVIOCGBIT(EV_SW, sizeof(device->swBitmask)), device->swBitmask); 932 ioctl(fd, EVIOCGBIT(EV_LED, sizeof(device->ledBitmask)), device->ledBitmask); 933 ioctl(fd, EVIOCGPROP(sizeof(device->propBitmask)), device->propBitmask); 934 935 // See if this is a keyboard. Ignore everything in the button range except for 936 // joystick and gamepad buttons which are handled like keyboards for the most part. 937 bool haveKeyboardKeys = containsNonZeroByte(device->keyBitmask, 0, sizeof_bit_array(BTN_MISC)) 938 || containsNonZeroByte(device->keyBitmask, sizeof_bit_array(KEY_OK), 939 sizeof_bit_array(KEY_MAX + 1)); 940 bool haveGamepadButtons = containsNonZeroByte(device->keyBitmask, sizeof_bit_array(BTN_MISC), 941 sizeof_bit_array(BTN_MOUSE)) 942 || containsNonZeroByte(device->keyBitmask, sizeof_bit_array(BTN_JOYSTICK), 943 sizeof_bit_array(BTN_DIGI)); 944 if (haveKeyboardKeys || haveGamepadButtons) { 945 device->classes |= INPUT_DEVICE_CLASS_KEYBOARD; 946 } 947 948 // See if this is a cursor device such as a trackball or mouse. 949 if (test_bit(BTN_MOUSE, device->keyBitmask) 950 && test_bit(REL_X, device->relBitmask) 951 && test_bit(REL_Y, device->relBitmask)) { 952 device->classes |= INPUT_DEVICE_CLASS_CURSOR; 953 } 954 955 // See if this is a touch pad. 956 // Is this a new modern multi-touch driver? 957 if (test_bit(ABS_MT_POSITION_X, device->absBitmask) 958 && test_bit(ABS_MT_POSITION_Y, device->absBitmask)) { 959 // Some joysticks such as the PS3 controller report axes that conflict 960 // with the ABS_MT range. Try to confirm that the device really is 961 // a touch screen. 962 if (test_bit(BTN_TOUCH, device->keyBitmask) || !haveGamepadButtons) { 963 device->classes |= INPUT_DEVICE_CLASS_TOUCH | INPUT_DEVICE_CLASS_TOUCH_MT; 964 } 965 // Is this an old style single-touch driver? 966 } else if (test_bit(BTN_TOUCH, device->keyBitmask) 967 && test_bit(ABS_X, device->absBitmask) 968 && test_bit(ABS_Y, device->absBitmask)) { 969 device->classes |= INPUT_DEVICE_CLASS_TOUCH; 970 } 971 972 // See if this device is a joystick. 973 // Assumes that joysticks always have gamepad buttons in order to distinguish them 974 // from other devices such as accelerometers that also have absolute axes. 975 if (haveGamepadButtons) { 976 uint32_t assumedClasses = device->classes | INPUT_DEVICE_CLASS_JOYSTICK; 977 for (int i = 0; i <= ABS_MAX; i++) { 978 if (test_bit(i, device->absBitmask) 979 && (getAbsAxisUsage(i, assumedClasses) & INPUT_DEVICE_CLASS_JOYSTICK)) { 980 device->classes = assumedClasses; 981 break; 982 } 983 } 984 } 985 986 // Check whether this device has switches. 987 for (int i = 0; i <= SW_MAX; i++) { 988 if (test_bit(i, device->swBitmask)) { 989 device->classes |= INPUT_DEVICE_CLASS_SWITCH; 990 break; 991 } 992 } 993 994 // Configure virtual keys. 995 if ((device->classes & INPUT_DEVICE_CLASS_TOUCH)) { 996 // Load the virtual keys for the touch screen, if any. 997 // We do this now so that we can make sure to load the keymap if necessary. 998 status_t status = loadVirtualKeyMapLocked(device); 999 if (!status) { 1000 device->classes |= INPUT_DEVICE_CLASS_KEYBOARD; 1001 } 1002 } 1003 1004 // Load the key map. 1005 // We need to do this for joysticks too because the key layout may specify axes. 1006 status_t keyMapStatus = NAME_NOT_FOUND; 1007 if (device->classes & (INPUT_DEVICE_CLASS_KEYBOARD | INPUT_DEVICE_CLASS_JOYSTICK)) { 1008 // Load the keymap for the device. 1009 keyMapStatus = loadKeyMapLocked(device); 1010 } 1011 1012 // Configure the keyboard, gamepad or virtual keyboard. 1013 if (device->classes & INPUT_DEVICE_CLASS_KEYBOARD) { 1014 // Set system properties for the keyboard. 1015 setKeyboardPropertiesLocked(device, false); 1016 1017 // Register the keyboard as a built-in keyboard if it is eligible. 1018 if (!keyMapStatus 1019 && mBuiltInKeyboardId == -1 1020 && isEligibleBuiltInKeyboard(device->identifier, 1021 device->configuration, &device->keyMap)) { 1022 mBuiltInKeyboardId = device->id; 1023 setKeyboardPropertiesLocked(device, true); 1024 } 1025 1026 // 'Q' key support = cheap test of whether this is an alpha-capable kbd 1027 if (hasKeycodeLocked(device, AKEYCODE_Q)) { 1028 device->classes |= INPUT_DEVICE_CLASS_ALPHAKEY; 1029 } 1030 1031 // See if this device has a DPAD. 1032 if (hasKeycodeLocked(device, AKEYCODE_DPAD_UP) && 1033 hasKeycodeLocked(device, AKEYCODE_DPAD_DOWN) && 1034 hasKeycodeLocked(device, AKEYCODE_DPAD_LEFT) && 1035 hasKeycodeLocked(device, AKEYCODE_DPAD_RIGHT) && 1036 hasKeycodeLocked(device, AKEYCODE_DPAD_CENTER)) { 1037 device->classes |= INPUT_DEVICE_CLASS_DPAD; 1038 } 1039 1040 // See if this device has a gamepad. 1041 for (size_t i = 0; i < sizeof(GAMEPAD_KEYCODES)/sizeof(GAMEPAD_KEYCODES[0]); i++) { 1042 if (hasKeycodeLocked(device, GAMEPAD_KEYCODES[i])) { 1043 device->classes |= INPUT_DEVICE_CLASS_GAMEPAD; 1044 break; 1045 } 1046 } 1047 } 1048 1049 // If the device isn't recognized as something we handle, don't monitor it. 1050 if (device->classes == 0) { 1051 LOGV("Dropping device: id=%d, path='%s', name='%s'", 1052 deviceId, devicePath, device->identifier.name.string()); 1053 delete device; 1054 return -1; 1055 } 1056 1057 // Determine whether the device is external or internal. 1058 if (isExternalDeviceLocked(device)) { 1059 device->classes |= INPUT_DEVICE_CLASS_EXTERNAL; 1060 } 1061 1062 // Register with epoll. 1063 struct epoll_event eventItem; 1064 memset(&eventItem, 0, sizeof(eventItem)); 1065 eventItem.events = EPOLLIN; 1066 eventItem.data.u32 = deviceId; 1067 if (epoll_ctl(mEpollFd, EPOLL_CTL_ADD, fd, &eventItem)) { 1068 LOGE("Could not add device fd to epoll instance. errno=%d", errno); 1069 delete device; 1070 return -1; 1071 } 1072 1073 LOGI("New device: id=%d, fd=%d, path='%s', name='%s', classes=0x%x, " 1074 "configuration='%s', keyLayout='%s', keyCharacterMap='%s', builtinKeyboard=%s", 1075 deviceId, fd, devicePath, device->identifier.name.string(), 1076 device->classes, 1077 device->configurationFile.string(), 1078 device->keyMap.keyLayoutFile.string(), 1079 device->keyMap.keyCharacterMapFile.string(), 1080 toString(mBuiltInKeyboardId == deviceId)); 1081 1082 mDevices.add(deviceId, device); 1083 1084 device->next = mOpeningDevices; 1085 mOpeningDevices = device; 1086 return 0; 1087} 1088 1089void EventHub::loadConfigurationLocked(Device* device) { 1090 device->configurationFile = getInputDeviceConfigurationFilePathByDeviceIdentifier( 1091 device->identifier, INPUT_DEVICE_CONFIGURATION_FILE_TYPE_CONFIGURATION); 1092 if (device->configurationFile.isEmpty()) { 1093 LOGD("No input device configuration file found for device '%s'.", 1094 device->identifier.name.string()); 1095 } else { 1096 status_t status = PropertyMap::load(device->configurationFile, 1097 &device->configuration); 1098 if (status) { 1099 LOGE("Error loading input device configuration file for device '%s'. " 1100 "Using default configuration.", 1101 device->identifier.name.string()); 1102 } 1103 } 1104} 1105 1106status_t EventHub::loadVirtualKeyMapLocked(Device* device) { 1107 // The virtual key map is supplied by the kernel as a system board property file. 1108 String8 path; 1109 path.append("/sys/board_properties/virtualkeys."); 1110 path.append(device->identifier.name); 1111 if (access(path.string(), R_OK)) { 1112 return NAME_NOT_FOUND; 1113 } 1114 return VirtualKeyMap::load(path, &device->virtualKeyMap); 1115} 1116 1117status_t EventHub::loadKeyMapLocked(Device* device) { 1118 return device->keyMap.load(device->identifier, device->configuration); 1119} 1120 1121void EventHub::setKeyboardPropertiesLocked(Device* device, bool builtInKeyboard) { 1122 int32_t id = builtInKeyboard ? 0 : device->id; 1123 android::setKeyboardProperties(id, device->identifier, 1124 device->keyMap.keyLayoutFile, device->keyMap.keyCharacterMapFile); 1125} 1126 1127void EventHub::clearKeyboardPropertiesLocked(Device* device, bool builtInKeyboard) { 1128 int32_t id = builtInKeyboard ? 0 : device->id; 1129 android::clearKeyboardProperties(id); 1130} 1131 1132bool EventHub::isExternalDeviceLocked(Device* device) { 1133 if (device->configuration) { 1134 bool value; 1135 if (device->configuration->tryGetProperty(String8("device.internal"), value) 1136 && value) { 1137 return false; 1138 } 1139 } 1140 return device->identifier.bus == BUS_USB || device->identifier.bus == BUS_BLUETOOTH; 1141} 1142 1143bool EventHub::hasKeycodeLocked(Device* device, int keycode) const { 1144 if (!device->keyMap.haveKeyLayout() || !device->keyBitmask) { 1145 return false; 1146 } 1147 1148 Vector<int32_t> scanCodes; 1149 device->keyMap.keyLayoutMap->findScanCodesForKey(keycode, &scanCodes); 1150 const size_t N = scanCodes.size(); 1151 for (size_t i=0; i<N && i<=KEY_MAX; i++) { 1152 int32_t sc = scanCodes.itemAt(i); 1153 if (sc >= 0 && sc <= KEY_MAX && test_bit(sc, device->keyBitmask)) { 1154 return true; 1155 } 1156 } 1157 1158 return false; 1159} 1160 1161status_t EventHub::closeDeviceByPathLocked(const char *devicePath) { 1162 Device* device = getDeviceByPathLocked(devicePath); 1163 if (device) { 1164 closeDeviceLocked(device); 1165 return 0; 1166 } 1167 LOGV("Remove device: %s not found, device may already have been removed.", devicePath); 1168 return -1; 1169} 1170 1171void EventHub::closeAllDevicesLocked() { 1172 while (mDevices.size() > 0) { 1173 closeDeviceLocked(mDevices.valueAt(mDevices.size() - 1)); 1174 } 1175} 1176 1177void EventHub::closeDeviceLocked(Device* device) { 1178 LOGI("Removed device: path=%s name=%s id=%d fd=%d classes=0x%x\n", 1179 device->path.string(), device->identifier.name.string(), device->id, 1180 device->fd, device->classes); 1181 1182 if (device->id == mBuiltInKeyboardId) { 1183 LOGW("built-in keyboard device %s (id=%d) is closing! the apps will not like this", 1184 device->path.string(), mBuiltInKeyboardId); 1185 mBuiltInKeyboardId = -1; 1186 clearKeyboardPropertiesLocked(device, true); 1187 } 1188 clearKeyboardPropertiesLocked(device, false); 1189 1190 if (epoll_ctl(mEpollFd, EPOLL_CTL_DEL, device->fd, NULL)) { 1191 LOGW("Could not remove device fd from epoll instance. errno=%d", errno); 1192 } 1193 1194 mDevices.removeItem(device->id); 1195 device->close(); 1196 1197 // Unlink for opening devices list if it is present. 1198 Device* pred = NULL; 1199 bool found = false; 1200 for (Device* entry = mOpeningDevices; entry != NULL; ) { 1201 if (entry == device) { 1202 found = true; 1203 break; 1204 } 1205 pred = entry; 1206 entry = entry->next; 1207 } 1208 if (found) { 1209 // Unlink the device from the opening devices list then delete it. 1210 // We don't need to tell the client that the device was closed because 1211 // it does not even know it was opened in the first place. 1212 LOGI("Device %s was immediately closed after opening.", device->path.string()); 1213 if (pred) { 1214 pred->next = device->next; 1215 } else { 1216 mOpeningDevices = device->next; 1217 } 1218 delete device; 1219 } else { 1220 // Link into closing devices list. 1221 // The device will be deleted later after we have informed the client. 1222 device->next = mClosingDevices; 1223 mClosingDevices = device; 1224 } 1225} 1226 1227status_t EventHub::readNotifyLocked() { 1228 int res; 1229 char devname[PATH_MAX]; 1230 char *filename; 1231 char event_buf[512]; 1232 int event_size; 1233 int event_pos = 0; 1234 struct inotify_event *event; 1235 1236 LOGV("EventHub::readNotify nfd: %d\n", mINotifyFd); 1237 res = read(mINotifyFd, event_buf, sizeof(event_buf)); 1238 if(res < (int)sizeof(*event)) { 1239 if(errno == EINTR) 1240 return 0; 1241 LOGW("could not get event, %s\n", strerror(errno)); 1242 return -1; 1243 } 1244 //printf("got %d bytes of event information\n", res); 1245 1246 strcpy(devname, DEVICE_PATH); 1247 filename = devname + strlen(devname); 1248 *filename++ = '/'; 1249 1250 while(res >= (int)sizeof(*event)) { 1251 event = (struct inotify_event *)(event_buf + event_pos); 1252 //printf("%d: %08x \"%s\"\n", event->wd, event->mask, event->len ? event->name : ""); 1253 if(event->len) { 1254 strcpy(filename, event->name); 1255 if(event->mask & IN_CREATE) { 1256 openDeviceLocked(devname); 1257 } else { 1258 closeDeviceByPathLocked(devname); 1259 } 1260 } 1261 event_size = sizeof(*event) + event->len; 1262 res -= event_size; 1263 event_pos += event_size; 1264 } 1265 return 0; 1266} 1267 1268status_t EventHub::scanDirLocked(const char *dirname) 1269{ 1270 char devname[PATH_MAX]; 1271 char *filename; 1272 DIR *dir; 1273 struct dirent *de; 1274 dir = opendir(dirname); 1275 if(dir == NULL) 1276 return -1; 1277 strcpy(devname, dirname); 1278 filename = devname + strlen(devname); 1279 *filename++ = '/'; 1280 while((de = readdir(dir))) { 1281 if(de->d_name[0] == '.' && 1282 (de->d_name[1] == '\0' || 1283 (de->d_name[1] == '.' && de->d_name[2] == '\0'))) 1284 continue; 1285 strcpy(filename, de->d_name); 1286 openDeviceLocked(devname); 1287 } 1288 closedir(dir); 1289 return 0; 1290} 1291 1292void EventHub::requestReopenDevices() { 1293 LOGV("requestReopenDevices() called"); 1294 1295 AutoMutex _l(mLock); 1296 mNeedToReopenDevices = true; 1297} 1298 1299void EventHub::dump(String8& dump) { 1300 dump.append("Event Hub State:\n"); 1301 1302 { // acquire lock 1303 AutoMutex _l(mLock); 1304 1305 dump.appendFormat(INDENT "BuiltInKeyboardId: %d\n", mBuiltInKeyboardId); 1306 1307 dump.append(INDENT "Devices:\n"); 1308 1309 for (size_t i = 0; i < mDevices.size(); i++) { 1310 const Device* device = mDevices.valueAt(i); 1311 if (mBuiltInKeyboardId == device->id) { 1312 dump.appendFormat(INDENT2 "%d: %s (aka device 0 - built-in keyboard)\n", 1313 device->id, device->identifier.name.string()); 1314 } else { 1315 dump.appendFormat(INDENT2 "%d: %s\n", device->id, 1316 device->identifier.name.string()); 1317 } 1318 dump.appendFormat(INDENT3 "Classes: 0x%08x\n", device->classes); 1319 dump.appendFormat(INDENT3 "Path: %s\n", device->path.string()); 1320 dump.appendFormat(INDENT3 "Location: %s\n", device->identifier.location.string()); 1321 dump.appendFormat(INDENT3 "UniqueId: %s\n", device->identifier.uniqueId.string()); 1322 dump.appendFormat(INDENT3 "Identifier: bus=0x%04x, vendor=0x%04x, " 1323 "product=0x%04x, version=0x%04x\n", 1324 device->identifier.bus, device->identifier.vendor, 1325 device->identifier.product, device->identifier.version); 1326 dump.appendFormat(INDENT3 "KeyLayoutFile: %s\n", 1327 device->keyMap.keyLayoutFile.string()); 1328 dump.appendFormat(INDENT3 "KeyCharacterMapFile: %s\n", 1329 device->keyMap.keyCharacterMapFile.string()); 1330 dump.appendFormat(INDENT3 "ConfigurationFile: %s\n", 1331 device->configurationFile.string()); 1332 } 1333 } // release lock 1334} 1335 1336void EventHub::monitor() { 1337 // Acquire and release the lock to ensure that the event hub has not deadlocked. 1338 mLock.lock(); 1339 mLock.unlock(); 1340} 1341 1342 1343}; // namespace android 1344