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 <androidfw/KeyLayoutMap.h> 40 #include <androidfw/KeyCharacterMap.h> 41 #include <androidfw/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 #include <sys/sha1.h> 52 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) 57 */ 58 #define test_bit(bit, array) (array[bit/8] & (1<<(bit%8))) 59 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) 62 63 #define INDENT " " 64 #define INDENT2 " " 65 #define INDENT3 " " 66 67 namespace android { 68 69 static const char *WAKE_LOCK_ID = "KeyEvents"; 70 static const char *DEVICE_PATH = "/dev/input"; 71 72 /* return the larger integer */ 73 static inline int max(int v1, int v2) 74 { 75 return (v1 > v2) ? v1 : v2; 76 } 77 78 static inline const char* toString(bool value) { 79 return value ? "true" : "false"; 80 } 81 82 static String8 sha1(const String8& in) { 83 SHA1_CTX ctx; 84 SHA1Init(&ctx); 85 SHA1Update(&ctx, reinterpret_cast<const u_char*>(in.string()), in.size()); 86 u_char digest[SHA1_DIGEST_LENGTH]; 87 SHA1Final(digest, &ctx); 88 89 String8 out; 90 for (size_t i = 0; i < SHA1_DIGEST_LENGTH; i++) { 91 out.appendFormat("%02x", digest[i]); 92 } 93 return out; 94 } 95 96 static void setDescriptor(InputDeviceIdentifier& identifier) { 97 // Compute a device descriptor that uniquely identifies the device. 98 // The descriptor is assumed to be a stable identifier. Its value should not 99 // change between reboots, reconnections, firmware updates or new releases of Android. 100 // Ideally, we also want the descriptor to be short and relatively opaque. 101 String8 rawDescriptor; 102 rawDescriptor.appendFormat(":%04x:%04x:", identifier.vendor, identifier.product); 103 if (!identifier.uniqueId.isEmpty()) { 104 rawDescriptor.append("uniqueId:"); 105 rawDescriptor.append(identifier.uniqueId); 106 } if (identifier.vendor == 0 && identifier.product == 0) { 107 // If we don't know the vendor and product id, then the device is probably 108 // built-in so we need to rely on other information to uniquely identify 109 // the input device. Usually we try to avoid relying on the device name or 110 // location but for built-in input device, they are unlikely to ever change. 111 if (!identifier.name.isEmpty()) { 112 rawDescriptor.append("name:"); 113 rawDescriptor.append(identifier.name); 114 } else if (!identifier.location.isEmpty()) { 115 rawDescriptor.append("location:"); 116 rawDescriptor.append(identifier.location); 117 } 118 } 119 identifier.descriptor = sha1(rawDescriptor); 120 ALOGV("Created descriptor: raw=%s, cooked=%s", rawDescriptor.string(), 121 identifier.descriptor.string()); 122 } 123 124 // --- Global Functions --- 125 126 uint32_t getAbsAxisUsage(int32_t axis, uint32_t deviceClasses) { 127 // Touch devices get dibs on touch-related axes. 128 if (deviceClasses & INPUT_DEVICE_CLASS_TOUCH) { 129 switch (axis) { 130 case ABS_X: 131 case ABS_Y: 132 case ABS_PRESSURE: 133 case ABS_TOOL_WIDTH: 134 case ABS_DISTANCE: 135 case ABS_TILT_X: 136 case ABS_TILT_Y: 137 case ABS_MT_SLOT: 138 case ABS_MT_TOUCH_MAJOR: 139 case ABS_MT_TOUCH_MINOR: 140 case ABS_MT_WIDTH_MAJOR: 141 case ABS_MT_WIDTH_MINOR: 142 case ABS_MT_ORIENTATION: 143 case ABS_MT_POSITION_X: 144 case ABS_MT_POSITION_Y: 145 case ABS_MT_TOOL_TYPE: 146 case ABS_MT_BLOB_ID: 147 case ABS_MT_TRACKING_ID: 148 case ABS_MT_PRESSURE: 149 case ABS_MT_DISTANCE: 150 return INPUT_DEVICE_CLASS_TOUCH; 151 } 152 } 153 154 // Joystick devices get the rest. 155 return deviceClasses & INPUT_DEVICE_CLASS_JOYSTICK; 156 } 157 158 // --- EventHub::Device --- 159 160 EventHub::Device::Device(int fd, int32_t id, const String8& path, 161 const InputDeviceIdentifier& identifier) : 162 next(NULL), 163 fd(fd), id(id), path(path), identifier(identifier), 164 classes(0), configuration(NULL), virtualKeyMap(NULL), 165 ffEffectPlaying(false), ffEffectId(-1), 166 timestampOverrideSec(0), timestampOverrideUsec(0) { 167 memset(keyBitmask, 0, sizeof(keyBitmask)); 168 memset(absBitmask, 0, sizeof(absBitmask)); 169 memset(relBitmask, 0, sizeof(relBitmask)); 170 memset(swBitmask, 0, sizeof(swBitmask)); 171 memset(ledBitmask, 0, sizeof(ledBitmask)); 172 memset(ffBitmask, 0, sizeof(ffBitmask)); 173 memset(propBitmask, 0, sizeof(propBitmask)); 174 } 175 176 EventHub::Device::~Device() { 177 close(); 178 delete configuration; 179 delete virtualKeyMap; 180 } 181 182 void EventHub::Device::close() { 183 if (fd >= 0) { 184 ::close(fd); 185 fd = -1; 186 } 187 } 188 189 190 // --- EventHub --- 191 192 const uint32_t EventHub::EPOLL_ID_INOTIFY; 193 const uint32_t EventHub::EPOLL_ID_WAKE; 194 const int EventHub::EPOLL_SIZE_HINT; 195 const int EventHub::EPOLL_MAX_EVENTS; 196 197 EventHub::EventHub(void) : 198 mBuiltInKeyboardId(NO_BUILT_IN_KEYBOARD), mNextDeviceId(1), 199 mOpeningDevices(0), mClosingDevices(0), 200 mNeedToSendFinishedDeviceScan(false), 201 mNeedToReopenDevices(false), mNeedToScanDevices(true), 202 mPendingEventCount(0), mPendingEventIndex(0), mPendingINotify(false) { 203 acquire_wake_lock(PARTIAL_WAKE_LOCK, WAKE_LOCK_ID); 204 205 mEpollFd = epoll_create(EPOLL_SIZE_HINT); 206 LOG_ALWAYS_FATAL_IF(mEpollFd < 0, "Could not create epoll instance. errno=%d", errno); 207 208 mINotifyFd = inotify_init(); 209 int result = inotify_add_watch(mINotifyFd, DEVICE_PATH, IN_DELETE | IN_CREATE); 210 LOG_ALWAYS_FATAL_IF(result < 0, "Could not register INotify for %s. errno=%d", 211 DEVICE_PATH, errno); 212 213 struct epoll_event eventItem; 214 memset(&eventItem, 0, sizeof(eventItem)); 215 eventItem.events = EPOLLIN; 216 eventItem.data.u32 = EPOLL_ID_INOTIFY; 217 result = epoll_ctl(mEpollFd, EPOLL_CTL_ADD, mINotifyFd, &eventItem); 218 LOG_ALWAYS_FATAL_IF(result != 0, "Could not add INotify to epoll instance. errno=%d", errno); 219 220 int wakeFds[2]; 221 result = pipe(wakeFds); 222 LOG_ALWAYS_FATAL_IF(result != 0, "Could not create wake pipe. errno=%d", errno); 223 224 mWakeReadPipeFd = wakeFds[0]; 225 mWakeWritePipeFd = wakeFds[1]; 226 227 result = fcntl(mWakeReadPipeFd, F_SETFL, O_NONBLOCK); 228 LOG_ALWAYS_FATAL_IF(result != 0, "Could not make wake read pipe non-blocking. errno=%d", 229 errno); 230 231 result = fcntl(mWakeWritePipeFd, F_SETFL, O_NONBLOCK); 232 LOG_ALWAYS_FATAL_IF(result != 0, "Could not make wake write pipe non-blocking. errno=%d", 233 errno); 234 235 eventItem.data.u32 = EPOLL_ID_WAKE; 236 result = epoll_ctl(mEpollFd, EPOLL_CTL_ADD, mWakeReadPipeFd, &eventItem); 237 LOG_ALWAYS_FATAL_IF(result != 0, "Could not add wake read pipe to epoll instance. errno=%d", 238 errno); 239 } 240 241 EventHub::~EventHub(void) { 242 closeAllDevicesLocked(); 243 244 while (mClosingDevices) { 245 Device* device = mClosingDevices; 246 mClosingDevices = device->next; 247 delete device; 248 } 249 250 ::close(mEpollFd); 251 ::close(mINotifyFd); 252 ::close(mWakeReadPipeFd); 253 ::close(mWakeWritePipeFd); 254 255 release_wake_lock(WAKE_LOCK_ID); 256 } 257 258 InputDeviceIdentifier EventHub::getDeviceIdentifier(int32_t deviceId) const { 259 AutoMutex _l(mLock); 260 Device* device = getDeviceLocked(deviceId); 261 if (device == NULL) return InputDeviceIdentifier(); 262 return device->identifier; 263 } 264 265 uint32_t EventHub::getDeviceClasses(int32_t deviceId) const { 266 AutoMutex _l(mLock); 267 Device* device = getDeviceLocked(deviceId); 268 if (device == NULL) return 0; 269 return device->classes; 270 } 271 272 void EventHub::getConfiguration(int32_t deviceId, PropertyMap* outConfiguration) const { 273 AutoMutex _l(mLock); 274 Device* device = getDeviceLocked(deviceId); 275 if (device && device->configuration) { 276 *outConfiguration = *device->configuration; 277 } else { 278 outConfiguration->clear(); 279 } 280 } 281 282 status_t EventHub::getAbsoluteAxisInfo(int32_t deviceId, int axis, 283 RawAbsoluteAxisInfo* outAxisInfo) const { 284 outAxisInfo->clear(); 285 286 if (axis >= 0 && axis <= ABS_MAX) { 287 AutoMutex _l(mLock); 288 289 Device* device = getDeviceLocked(deviceId); 290 if (device && !device->isVirtual() && test_bit(axis, device->absBitmask)) { 291 struct input_absinfo info; 292 if(ioctl(device->fd, EVIOCGABS(axis), &info)) { 293 ALOGW("Error reading absolute controller %d for device %s fd %d, errno=%d", 294 axis, device->identifier.name.string(), device->fd, errno); 295 return -errno; 296 } 297 298 if (info.minimum != info.maximum) { 299 outAxisInfo->valid = true; 300 outAxisInfo->minValue = info.minimum; 301 outAxisInfo->maxValue = info.maximum; 302 outAxisInfo->flat = info.flat; 303 outAxisInfo->fuzz = info.fuzz; 304 outAxisInfo->resolution = info.resolution; 305 } 306 return OK; 307 } 308 } 309 return -1; 310 } 311 312 bool EventHub::hasRelativeAxis(int32_t deviceId, int axis) const { 313 if (axis >= 0 && axis <= REL_MAX) { 314 AutoMutex _l(mLock); 315 316 Device* device = getDeviceLocked(deviceId); 317 if (device) { 318 return test_bit(axis, device->relBitmask); 319 } 320 } 321 return false; 322 } 323 324 bool EventHub::hasInputProperty(int32_t deviceId, int property) const { 325 if (property >= 0 && property <= INPUT_PROP_MAX) { 326 AutoMutex _l(mLock); 327 328 Device* device = getDeviceLocked(deviceId); 329 if (device) { 330 return test_bit(property, device->propBitmask); 331 } 332 } 333 return false; 334 } 335 336 int32_t EventHub::getScanCodeState(int32_t deviceId, int32_t scanCode) const { 337 if (scanCode >= 0 && scanCode <= KEY_MAX) { 338 AutoMutex _l(mLock); 339 340 Device* device = getDeviceLocked(deviceId); 341 if (device && !device->isVirtual() && test_bit(scanCode, device->keyBitmask)) { 342 uint8_t keyState[sizeof_bit_array(KEY_MAX + 1)]; 343 memset(keyState, 0, sizeof(keyState)); 344 if (ioctl(device->fd, EVIOCGKEY(sizeof(keyState)), keyState) >= 0) { 345 return test_bit(scanCode, keyState) ? AKEY_STATE_DOWN : AKEY_STATE_UP; 346 } 347 } 348 } 349 return AKEY_STATE_UNKNOWN; 350 } 351 352 int32_t EventHub::getKeyCodeState(int32_t deviceId, int32_t keyCode) const { 353 AutoMutex _l(mLock); 354 355 Device* device = getDeviceLocked(deviceId); 356 if (device && !device->isVirtual() && device->keyMap.haveKeyLayout()) { 357 Vector<int32_t> scanCodes; 358 device->keyMap.keyLayoutMap->findScanCodesForKey(keyCode, &scanCodes); 359 if (scanCodes.size() != 0) { 360 uint8_t keyState[sizeof_bit_array(KEY_MAX + 1)]; 361 memset(keyState, 0, sizeof(keyState)); 362 if (ioctl(device->fd, EVIOCGKEY(sizeof(keyState)), keyState) >= 0) { 363 for (size_t i = 0; i < scanCodes.size(); i++) { 364 int32_t sc = scanCodes.itemAt(i); 365 if (sc >= 0 && sc <= KEY_MAX && test_bit(sc, keyState)) { 366 return AKEY_STATE_DOWN; 367 } 368 } 369 return AKEY_STATE_UP; 370 } 371 } 372 } 373 return AKEY_STATE_UNKNOWN; 374 } 375 376 int32_t EventHub::getSwitchState(int32_t deviceId, int32_t sw) const { 377 if (sw >= 0 && sw <= SW_MAX) { 378 AutoMutex _l(mLock); 379 380 Device* device = getDeviceLocked(deviceId); 381 if (device && !device->isVirtual() && test_bit(sw, device->swBitmask)) { 382 uint8_t swState[sizeof_bit_array(SW_MAX + 1)]; 383 memset(swState, 0, sizeof(swState)); 384 if (ioctl(device->fd, EVIOCGSW(sizeof(swState)), swState) >= 0) { 385 return test_bit(sw, swState) ? AKEY_STATE_DOWN : AKEY_STATE_UP; 386 } 387 } 388 } 389 return AKEY_STATE_UNKNOWN; 390 } 391 392 status_t EventHub::getAbsoluteAxisValue(int32_t deviceId, int32_t axis, int32_t* outValue) const { 393 *outValue = 0; 394 395 if (axis >= 0 && axis <= ABS_MAX) { 396 AutoMutex _l(mLock); 397 398 Device* device = getDeviceLocked(deviceId); 399 if (device && !device->isVirtual() && test_bit(axis, device->absBitmask)) { 400 struct input_absinfo info; 401 if(ioctl(device->fd, EVIOCGABS(axis), &info)) { 402 ALOGW("Error reading absolute controller %d for device %s fd %d, errno=%d", 403 axis, device->identifier.name.string(), device->fd, errno); 404 return -errno; 405 } 406 407 *outValue = info.value; 408 return OK; 409 } 410 } 411 return -1; 412 } 413 414 bool EventHub::markSupportedKeyCodes(int32_t deviceId, size_t numCodes, 415 const int32_t* keyCodes, uint8_t* outFlags) const { 416 AutoMutex _l(mLock); 417 418 Device* device = getDeviceLocked(deviceId); 419 if (device && device->keyMap.haveKeyLayout()) { 420 Vector<int32_t> scanCodes; 421 for (size_t codeIndex = 0; codeIndex < numCodes; codeIndex++) { 422 scanCodes.clear(); 423 424 status_t err = device->keyMap.keyLayoutMap->findScanCodesForKey( 425 keyCodes[codeIndex], &scanCodes); 426 if (! err) { 427 // check the possible scan codes identified by the layout map against the 428 // map of codes actually emitted by the driver 429 for (size_t sc = 0; sc < scanCodes.size(); sc++) { 430 if (test_bit(scanCodes[sc], device->keyBitmask)) { 431 outFlags[codeIndex] = 1; 432 break; 433 } 434 } 435 } 436 } 437 return true; 438 } 439 return false; 440 } 441 442 status_t EventHub::mapKey(int32_t deviceId, int32_t scanCode, int32_t usageCode, 443 int32_t* outKeycode, uint32_t* outFlags) const { 444 AutoMutex _l(mLock); 445 Device* device = getDeviceLocked(deviceId); 446 447 if (device) { 448 // Check the key character map first. 449 sp<KeyCharacterMap> kcm = device->getKeyCharacterMap(); 450 if (kcm != NULL) { 451 if (!kcm->mapKey(scanCode, usageCode, outKeycode)) { 452 *outFlags = 0; 453 return NO_ERROR; 454 } 455 } 456 457 // Check the key layout next. 458 if (device->keyMap.haveKeyLayout()) { 459 if (!device->keyMap.keyLayoutMap->mapKey( 460 scanCode, usageCode, outKeycode, outFlags)) { 461 return NO_ERROR; 462 } 463 } 464 } 465 466 *outKeycode = 0; 467 *outFlags = 0; 468 return NAME_NOT_FOUND; 469 } 470 471 status_t EventHub::mapAxis(int32_t deviceId, int32_t scanCode, AxisInfo* outAxisInfo) const { 472 AutoMutex _l(mLock); 473 Device* device = getDeviceLocked(deviceId); 474 475 if (device && device->keyMap.haveKeyLayout()) { 476 status_t err = device->keyMap.keyLayoutMap->mapAxis(scanCode, outAxisInfo); 477 if (err == NO_ERROR) { 478 return NO_ERROR; 479 } 480 } 481 482 return NAME_NOT_FOUND; 483 } 484 485 void EventHub::setExcludedDevices(const Vector<String8>& devices) { 486 AutoMutex _l(mLock); 487 488 mExcludedDevices = devices; 489 } 490 491 bool EventHub::hasScanCode(int32_t deviceId, int32_t scanCode) const { 492 AutoMutex _l(mLock); 493 Device* device = getDeviceLocked(deviceId); 494 if (device && scanCode >= 0 && scanCode <= KEY_MAX) { 495 if (test_bit(scanCode, device->keyBitmask)) { 496 return true; 497 } 498 } 499 return false; 500 } 501 502 bool EventHub::hasLed(int32_t deviceId, int32_t led) const { 503 AutoMutex _l(mLock); 504 Device* device = getDeviceLocked(deviceId); 505 if (device && led >= 0 && led <= LED_MAX) { 506 if (test_bit(led, device->ledBitmask)) { 507 return true; 508 } 509 } 510 return false; 511 } 512 513 void EventHub::setLedState(int32_t deviceId, int32_t led, bool on) { 514 AutoMutex _l(mLock); 515 Device* device = getDeviceLocked(deviceId); 516 if (device && !device->isVirtual() && led >= 0 && led <= LED_MAX) { 517 struct input_event ev; 518 ev.time.tv_sec = 0; 519 ev.time.tv_usec = 0; 520 ev.type = EV_LED; 521 ev.code = led; 522 ev.value = on ? 1 : 0; 523 524 ssize_t nWrite; 525 do { 526 nWrite = write(device->fd, &ev, sizeof(struct input_event)); 527 } while (nWrite == -1 && errno == EINTR); 528 } 529 } 530 531 void EventHub::getVirtualKeyDefinitions(int32_t deviceId, 532 Vector<VirtualKeyDefinition>& outVirtualKeys) const { 533 outVirtualKeys.clear(); 534 535 AutoMutex _l(mLock); 536 Device* device = getDeviceLocked(deviceId); 537 if (device && device->virtualKeyMap) { 538 outVirtualKeys.appendVector(device->virtualKeyMap->getVirtualKeys()); 539 } 540 } 541 542 sp<KeyCharacterMap> EventHub::getKeyCharacterMap(int32_t deviceId) const { 543 AutoMutex _l(mLock); 544 Device* device = getDeviceLocked(deviceId); 545 if (device) { 546 return device->getKeyCharacterMap(); 547 } 548 return NULL; 549 } 550 551 bool EventHub::setKeyboardLayoutOverlay(int32_t deviceId, 552 const sp<KeyCharacterMap>& map) { 553 AutoMutex _l(mLock); 554 Device* device = getDeviceLocked(deviceId); 555 if (device) { 556 if (map != device->overlayKeyMap) { 557 device->overlayKeyMap = map; 558 device->combinedKeyMap = KeyCharacterMap::combine( 559 device->keyMap.keyCharacterMap, map); 560 return true; 561 } 562 } 563 return false; 564 } 565 566 void EventHub::vibrate(int32_t deviceId, nsecs_t duration) { 567 AutoMutex _l(mLock); 568 Device* device = getDeviceLocked(deviceId); 569 if (device && !device->isVirtual()) { 570 ff_effect effect; 571 memset(&effect, 0, sizeof(effect)); 572 effect.type = FF_RUMBLE; 573 effect.id = device->ffEffectId; 574 effect.u.rumble.strong_magnitude = 0xc000; 575 effect.u.rumble.weak_magnitude = 0xc000; 576 effect.replay.length = (duration + 999999LL) / 1000000LL; 577 effect.replay.delay = 0; 578 if (ioctl(device->fd, EVIOCSFF, &effect)) { 579 ALOGW("Could not upload force feedback effect to device %s due to error %d.", 580 device->identifier.name.string(), errno); 581 return; 582 } 583 device->ffEffectId = effect.id; 584 585 struct input_event ev; 586 ev.time.tv_sec = 0; 587 ev.time.tv_usec = 0; 588 ev.type = EV_FF; 589 ev.code = device->ffEffectId; 590 ev.value = 1; 591 if (write(device->fd, &ev, sizeof(ev)) != sizeof(ev)) { 592 ALOGW("Could not start force feedback effect on device %s due to error %d.", 593 device->identifier.name.string(), errno); 594 return; 595 } 596 device->ffEffectPlaying = true; 597 } 598 } 599 600 void EventHub::cancelVibrate(int32_t deviceId) { 601 AutoMutex _l(mLock); 602 Device* device = getDeviceLocked(deviceId); 603 if (device && !device->isVirtual()) { 604 if (device->ffEffectPlaying) { 605 device->ffEffectPlaying = false; 606 607 struct input_event ev; 608 ev.time.tv_sec = 0; 609 ev.time.tv_usec = 0; 610 ev.type = EV_FF; 611 ev.code = device->ffEffectId; 612 ev.value = 0; 613 if (write(device->fd, &ev, sizeof(ev)) != sizeof(ev)) { 614 ALOGW("Could not stop force feedback effect on device %s due to error %d.", 615 device->identifier.name.string(), errno); 616 return; 617 } 618 } 619 } 620 } 621 622 EventHub::Device* EventHub::getDeviceLocked(int32_t deviceId) const { 623 if (deviceId == BUILT_IN_KEYBOARD_ID) { 624 deviceId = mBuiltInKeyboardId; 625 } 626 ssize_t index = mDevices.indexOfKey(deviceId); 627 return index >= 0 ? mDevices.valueAt(index) : NULL; 628 } 629 630 EventHub::Device* EventHub::getDeviceByPathLocked(const char* devicePath) const { 631 for (size_t i = 0; i < mDevices.size(); i++) { 632 Device* device = mDevices.valueAt(i); 633 if (device->path == devicePath) { 634 return device; 635 } 636 } 637 return NULL; 638 } 639 640 size_t EventHub::getEvents(int timeoutMillis, RawEvent* buffer, size_t bufferSize) { 641 ALOG_ASSERT(bufferSize >= 1); 642 643 AutoMutex _l(mLock); 644 645 struct input_event readBuffer[bufferSize]; 646 647 RawEvent* event = buffer; 648 size_t capacity = bufferSize; 649 bool awoken = false; 650 for (;;) { 651 nsecs_t now = systemTime(SYSTEM_TIME_MONOTONIC); 652 653 // Reopen input devices if needed. 654 if (mNeedToReopenDevices) { 655 mNeedToReopenDevices = false; 656 657 ALOGI("Reopening all input devices due to a configuration change."); 658 659 closeAllDevicesLocked(); 660 mNeedToScanDevices = true; 661 break; // return to the caller before we actually rescan 662 } 663 664 // Report any devices that had last been added/removed. 665 while (mClosingDevices) { 666 Device* device = mClosingDevices; 667 ALOGV("Reporting device closed: id=%d, name=%s\n", 668 device->id, device->path.string()); 669 mClosingDevices = device->next; 670 event->when = now; 671 event->deviceId = device->id == mBuiltInKeyboardId ? BUILT_IN_KEYBOARD_ID : device->id; 672 event->type = DEVICE_REMOVED; 673 event += 1; 674 delete device; 675 mNeedToSendFinishedDeviceScan = true; 676 if (--capacity == 0) { 677 break; 678 } 679 } 680 681 if (mNeedToScanDevices) { 682 mNeedToScanDevices = false; 683 scanDevicesLocked(); 684 mNeedToSendFinishedDeviceScan = true; 685 } 686 687 while (mOpeningDevices != NULL) { 688 Device* device = mOpeningDevices; 689 ALOGV("Reporting device opened: id=%d, name=%s\n", 690 device->id, device->path.string()); 691 mOpeningDevices = device->next; 692 event->when = now; 693 event->deviceId = device->id == mBuiltInKeyboardId ? 0 : device->id; 694 event->type = DEVICE_ADDED; 695 event += 1; 696 mNeedToSendFinishedDeviceScan = true; 697 if (--capacity == 0) { 698 break; 699 } 700 } 701 702 if (mNeedToSendFinishedDeviceScan) { 703 mNeedToSendFinishedDeviceScan = false; 704 event->when = now; 705 event->type = FINISHED_DEVICE_SCAN; 706 event += 1; 707 if (--capacity == 0) { 708 break; 709 } 710 } 711 712 // Grab the next input event. 713 bool deviceChanged = false; 714 while (mPendingEventIndex < mPendingEventCount) { 715 const struct epoll_event& eventItem = mPendingEventItems[mPendingEventIndex++]; 716 if (eventItem.data.u32 == EPOLL_ID_INOTIFY) { 717 if (eventItem.events & EPOLLIN) { 718 mPendingINotify = true; 719 } else { 720 ALOGW("Received unexpected epoll event 0x%08x for INotify.", eventItem.events); 721 } 722 continue; 723 } 724 725 if (eventItem.data.u32 == EPOLL_ID_WAKE) { 726 if (eventItem.events & EPOLLIN) { 727 ALOGV("awoken after wake()"); 728 awoken = true; 729 char buffer[16]; 730 ssize_t nRead; 731 do { 732 nRead = read(mWakeReadPipeFd, buffer, sizeof(buffer)); 733 } while ((nRead == -1 && errno == EINTR) || nRead == sizeof(buffer)); 734 } else { 735 ALOGW("Received unexpected epoll event 0x%08x for wake read pipe.", 736 eventItem.events); 737 } 738 continue; 739 } 740 741 ssize_t deviceIndex = mDevices.indexOfKey(eventItem.data.u32); 742 if (deviceIndex < 0) { 743 ALOGW("Received unexpected epoll event 0x%08x for unknown device id %d.", 744 eventItem.events, eventItem.data.u32); 745 continue; 746 } 747 748 Device* device = mDevices.valueAt(deviceIndex); 749 if (eventItem.events & EPOLLIN) { 750 int32_t readSize = read(device->fd, readBuffer, 751 sizeof(struct input_event) * capacity); 752 if (readSize == 0 || (readSize < 0 && errno == ENODEV)) { 753 // Device was removed before INotify noticed. 754 ALOGW("could not get event, removed? (fd: %d size: %d bufferSize: %d " 755 "capacity: %d errno: %d)\n", 756 device->fd, readSize, bufferSize, capacity, errno); 757 deviceChanged = true; 758 closeDeviceLocked(device); 759 } else if (readSize < 0) { 760 if (errno != EAGAIN && errno != EINTR) { 761 ALOGW("could not get event (errno=%d)", errno); 762 } 763 } else if ((readSize % sizeof(struct input_event)) != 0) { 764 ALOGE("could not get event (wrong size: %d)", readSize); 765 } else { 766 int32_t deviceId = device->id == mBuiltInKeyboardId ? 0 : device->id; 767 768 size_t count = size_t(readSize) / sizeof(struct input_event); 769 for (size_t i = 0; i < count; i++) { 770 struct input_event& iev = readBuffer[i]; 771 ALOGV("%s got: time=%d.%06d, type=%d, code=%d, value=%d", 772 device->path.string(), 773 (int) iev.time.tv_sec, (int) iev.time.tv_usec, 774 iev.type, iev.code, iev.value); 775 776 // Some input devices may have a better concept of the time 777 // when an input event was actually generated than the kernel 778 // which simply timestamps all events on entry to evdev. 779 // This is a custom Android extension of the input protocol 780 // mainly intended for use with uinput based device drivers. 781 if (iev.type == EV_MSC) { 782 if (iev.code == MSC_ANDROID_TIME_SEC) { 783 device->timestampOverrideSec = iev.value; 784 continue; 785 } else if (iev.code == MSC_ANDROID_TIME_USEC) { 786 device->timestampOverrideUsec = iev.value; 787 continue; 788 } 789 } 790 if (device->timestampOverrideSec || device->timestampOverrideUsec) { 791 iev.time.tv_sec = device->timestampOverrideSec; 792 iev.time.tv_usec = device->timestampOverrideUsec; 793 if (iev.type == EV_SYN && iev.code == SYN_REPORT) { 794 device->timestampOverrideSec = 0; 795 device->timestampOverrideUsec = 0; 796 } 797 ALOGV("applied override time %d.%06d", 798 int(iev.time.tv_sec), int(iev.time.tv_usec)); 799 } 800 801 #ifdef HAVE_POSIX_CLOCKS 802 // Use the time specified in the event instead of the current time 803 // so that downstream code can get more accurate estimates of 804 // event dispatch latency from the time the event is enqueued onto 805 // the evdev client buffer. 806 // 807 // The event's timestamp fortuitously uses the same monotonic clock 808 // time base as the rest of Android. The kernel event device driver 809 // (drivers/input/evdev.c) obtains timestamps using ktime_get_ts(). 810 // The systemTime(SYSTEM_TIME_MONOTONIC) function we use everywhere 811 // calls clock_gettime(CLOCK_MONOTONIC) which is implemented as a 812 // system call that also queries ktime_get_ts(). 813 event->when = nsecs_t(iev.time.tv_sec) * 1000000000LL 814 + nsecs_t(iev.time.tv_usec) * 1000LL; 815 ALOGV("event time %lld, now %lld", event->when, now); 816 817 // Bug 7291243: Add a guard in case the kernel generates timestamps 818 // that appear to be far into the future because they were generated 819 // using the wrong clock source. 820 // 821 // This can happen because when the input device is initially opened 822 // it has a default clock source of CLOCK_REALTIME. Any input events 823 // enqueued right after the device is opened will have timestamps 824 // generated using CLOCK_REALTIME. We later set the clock source 825 // to CLOCK_MONOTONIC but it is already too late. 826 // 827 // Invalid input event timestamps can result in ANRs, crashes and 828 // and other issues that are hard to track down. We must not let them 829 // propagate through the system. 830 // 831 // Log a warning so that we notice the problem and recover gracefully. 832 if (event->when >= now + 10 * 1000000000LL) { 833 // Double-check. Time may have moved on. 834 nsecs_t time = systemTime(SYSTEM_TIME_MONOTONIC); 835 if (event->when > time) { 836 ALOGW("An input event from %s has a timestamp that appears to " 837 "have been generated using the wrong clock source " 838 "(expected CLOCK_MONOTONIC): " 839 "event time %lld, current time %lld, call time %lld. " 840 "Using current time instead.", 841 device->path.string(), event->when, time, now); 842 event->when = time; 843 } else { 844 ALOGV("Event time is ok but failed the fast path and required " 845 "an extra call to systemTime: " 846 "event time %lld, current time %lld, call time %lld.", 847 event->when, time, now); 848 } 849 } 850 #else 851 event->when = now; 852 #endif 853 event->deviceId = deviceId; 854 event->type = iev.type; 855 event->code = iev.code; 856 event->value = iev.value; 857 event += 1; 858 capacity -= 1; 859 } 860 if (capacity == 0) { 861 // The result buffer is full. Reset the pending event index 862 // so we will try to read the device again on the next iteration. 863 mPendingEventIndex -= 1; 864 break; 865 } 866 } 867 } else if (eventItem.events & EPOLLHUP) { 868 ALOGI("Removing device %s due to epoll hang-up event.", 869 device->identifier.name.string()); 870 deviceChanged = true; 871 closeDeviceLocked(device); 872 } else { 873 ALOGW("Received unexpected epoll event 0x%08x for device %s.", 874 eventItem.events, device->identifier.name.string()); 875 } 876 } 877 878 // readNotify() will modify the list of devices so this must be done after 879 // processing all other events to ensure that we read all remaining events 880 // before closing the devices. 881 if (mPendingINotify && mPendingEventIndex >= mPendingEventCount) { 882 mPendingINotify = false; 883 readNotifyLocked(); 884 deviceChanged = true; 885 } 886 887 // Report added or removed devices immediately. 888 if (deviceChanged) { 889 continue; 890 } 891 892 // Return now if we have collected any events or if we were explicitly awoken. 893 if (event != buffer || awoken) { 894 break; 895 } 896 897 // Poll for events. Mind the wake lock dance! 898 // We hold a wake lock at all times except during epoll_wait(). This works due to some 899 // subtle choreography. When a device driver has pending (unread) events, it acquires 900 // a kernel wake lock. However, once the last pending event has been read, the device 901 // driver will release the kernel wake lock. To prevent the system from going to sleep 902 // when this happens, the EventHub holds onto its own user wake lock while the client 903 // is processing events. Thus the system can only sleep if there are no events 904 // pending or currently being processed. 905 // 906 // The timeout is advisory only. If the device is asleep, it will not wake just to 907 // service the timeout. 908 mPendingEventIndex = 0; 909 910 mLock.unlock(); // release lock before poll, must be before release_wake_lock 911 release_wake_lock(WAKE_LOCK_ID); 912 913 int pollResult = epoll_wait(mEpollFd, mPendingEventItems, EPOLL_MAX_EVENTS, timeoutMillis); 914 915 acquire_wake_lock(PARTIAL_WAKE_LOCK, WAKE_LOCK_ID); 916 mLock.lock(); // reacquire lock after poll, must be after acquire_wake_lock 917 918 if (pollResult == 0) { 919 // Timed out. 920 mPendingEventCount = 0; 921 break; 922 } 923 924 if (pollResult < 0) { 925 // An error occurred. 926 mPendingEventCount = 0; 927 928 // Sleep after errors to avoid locking up the system. 929 // Hopefully the error is transient. 930 if (errno != EINTR) { 931 ALOGW("poll failed (errno=%d)\n", errno); 932 usleep(100000); 933 } 934 } else { 935 // Some events occurred. 936 mPendingEventCount = size_t(pollResult); 937 } 938 } 939 940 // All done, return the number of events we read. 941 return event - buffer; 942 } 943 944 void EventHub::wake() { 945 ALOGV("wake() called"); 946 947 ssize_t nWrite; 948 do { 949 nWrite = write(mWakeWritePipeFd, "W", 1); 950 } while (nWrite == -1 && errno == EINTR); 951 952 if (nWrite != 1 && errno != EAGAIN) { 953 ALOGW("Could not write wake signal, errno=%d", errno); 954 } 955 } 956 957 void EventHub::scanDevicesLocked() { 958 status_t res = scanDirLocked(DEVICE_PATH); 959 if(res < 0) { 960 ALOGE("scan dir failed for %s\n", DEVICE_PATH); 961 } 962 if (mDevices.indexOfKey(VIRTUAL_KEYBOARD_ID) < 0) { 963 createVirtualKeyboardLocked(); 964 } 965 } 966 967 // ---------------------------------------------------------------------------- 968 969 static bool containsNonZeroByte(const uint8_t* array, uint32_t startIndex, uint32_t endIndex) { 970 const uint8_t* end = array + endIndex; 971 array += startIndex; 972 while (array != end) { 973 if (*(array++) != 0) { 974 return true; 975 } 976 } 977 return false; 978 } 979 980 static const int32_t GAMEPAD_KEYCODES[] = { 981 AKEYCODE_BUTTON_A, AKEYCODE_BUTTON_B, AKEYCODE_BUTTON_C, 982 AKEYCODE_BUTTON_X, AKEYCODE_BUTTON_Y, AKEYCODE_BUTTON_Z, 983 AKEYCODE_BUTTON_L1, AKEYCODE_BUTTON_R1, 984 AKEYCODE_BUTTON_L2, AKEYCODE_BUTTON_R2, 985 AKEYCODE_BUTTON_THUMBL, AKEYCODE_BUTTON_THUMBR, 986 AKEYCODE_BUTTON_START, AKEYCODE_BUTTON_SELECT, AKEYCODE_BUTTON_MODE, 987 AKEYCODE_BUTTON_1, AKEYCODE_BUTTON_2, AKEYCODE_BUTTON_3, AKEYCODE_BUTTON_4, 988 AKEYCODE_BUTTON_5, AKEYCODE_BUTTON_6, AKEYCODE_BUTTON_7, AKEYCODE_BUTTON_8, 989 AKEYCODE_BUTTON_9, AKEYCODE_BUTTON_10, AKEYCODE_BUTTON_11, AKEYCODE_BUTTON_12, 990 AKEYCODE_BUTTON_13, AKEYCODE_BUTTON_14, AKEYCODE_BUTTON_15, AKEYCODE_BUTTON_16, 991 }; 992 993 status_t EventHub::openDeviceLocked(const char *devicePath) { 994 char buffer[80]; 995 996 ALOGV("Opening device: %s", devicePath); 997 998 int fd = open(devicePath, O_RDWR | O_CLOEXEC); 999 if(fd < 0) { 1000 ALOGE("could not open %s, %s\n", devicePath, strerror(errno)); 1001 return -1; 1002 } 1003 1004 InputDeviceIdentifier identifier; 1005 1006 // Get device name. 1007 if(ioctl(fd, EVIOCGNAME(sizeof(buffer) - 1), &buffer) < 1) { 1008 //fprintf(stderr, "could not get device name for %s, %s\n", devicePath, strerror(errno)); 1009 } else { 1010 buffer[sizeof(buffer) - 1] = '\0'; 1011 identifier.name.setTo(buffer); 1012 } 1013 1014 // Check to see if the device is on our excluded list 1015 for (size_t i = 0; i < mExcludedDevices.size(); i++) { 1016 const String8& item = mExcludedDevices.itemAt(i); 1017 if (identifier.name == item) { 1018 ALOGI("ignoring event id %s driver %s\n", devicePath, item.string()); 1019 close(fd); 1020 return -1; 1021 } 1022 } 1023 1024 // Get device driver version. 1025 int driverVersion; 1026 if(ioctl(fd, EVIOCGVERSION, &driverVersion)) { 1027 ALOGE("could not get driver version for %s, %s\n", devicePath, strerror(errno)); 1028 close(fd); 1029 return -1; 1030 } 1031 1032 // Get device identifier. 1033 struct input_id inputId; 1034 if(ioctl(fd, EVIOCGID, &inputId)) { 1035 ALOGE("could not get device input id for %s, %s\n", devicePath, strerror(errno)); 1036 close(fd); 1037 return -1; 1038 } 1039 identifier.bus = inputId.bustype; 1040 identifier.product = inputId.product; 1041 identifier.vendor = inputId.vendor; 1042 identifier.version = inputId.version; 1043 1044 // Get device physical location. 1045 if(ioctl(fd, EVIOCGPHYS(sizeof(buffer) - 1), &buffer) < 1) { 1046 //fprintf(stderr, "could not get location for %s, %s\n", devicePath, strerror(errno)); 1047 } else { 1048 buffer[sizeof(buffer) - 1] = '\0'; 1049 identifier.location.setTo(buffer); 1050 } 1051 1052 // Get device unique id. 1053 if(ioctl(fd, EVIOCGUNIQ(sizeof(buffer) - 1), &buffer) < 1) { 1054 //fprintf(stderr, "could not get idstring for %s, %s\n", devicePath, strerror(errno)); 1055 } else { 1056 buffer[sizeof(buffer) - 1] = '\0'; 1057 identifier.uniqueId.setTo(buffer); 1058 } 1059 1060 // Fill in the descriptor. 1061 setDescriptor(identifier); 1062 1063 // Make file descriptor non-blocking for use with poll(). 1064 if (fcntl(fd, F_SETFL, O_NONBLOCK)) { 1065 ALOGE("Error %d making device file descriptor non-blocking.", errno); 1066 close(fd); 1067 return -1; 1068 } 1069 1070 // Allocate device. (The device object takes ownership of the fd at this point.) 1071 int32_t deviceId = mNextDeviceId++; 1072 Device* device = new Device(fd, deviceId, String8(devicePath), identifier); 1073 1074 ALOGV("add device %d: %s\n", deviceId, devicePath); 1075 ALOGV(" bus: %04x\n" 1076 " vendor %04x\n" 1077 " product %04x\n" 1078 " version %04x\n", 1079 identifier.bus, identifier.vendor, identifier.product, identifier.version); 1080 ALOGV(" name: \"%s\"\n", identifier.name.string()); 1081 ALOGV(" location: \"%s\"\n", identifier.location.string()); 1082 ALOGV(" unique id: \"%s\"\n", identifier.uniqueId.string()); 1083 ALOGV(" descriptor: \"%s\"\n", identifier.descriptor.string()); 1084 ALOGV(" driver: v%d.%d.%d\n", 1085 driverVersion >> 16, (driverVersion >> 8) & 0xff, driverVersion & 0xff); 1086 1087 // Load the configuration file for the device. 1088 loadConfigurationLocked(device); 1089 1090 // Figure out the kinds of events the device reports. 1091 ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(device->keyBitmask)), device->keyBitmask); 1092 ioctl(fd, EVIOCGBIT(EV_ABS, sizeof(device->absBitmask)), device->absBitmask); 1093 ioctl(fd, EVIOCGBIT(EV_REL, sizeof(device->relBitmask)), device->relBitmask); 1094 ioctl(fd, EVIOCGBIT(EV_SW, sizeof(device->swBitmask)), device->swBitmask); 1095 ioctl(fd, EVIOCGBIT(EV_LED, sizeof(device->ledBitmask)), device->ledBitmask); 1096 ioctl(fd, EVIOCGBIT(EV_FF, sizeof(device->ffBitmask)), device->ffBitmask); 1097 ioctl(fd, EVIOCGPROP(sizeof(device->propBitmask)), device->propBitmask); 1098 1099 // See if this is a keyboard. Ignore everything in the button range except for 1100 // joystick and gamepad buttons which are handled like keyboards for the most part. 1101 bool haveKeyboardKeys = containsNonZeroByte(device->keyBitmask, 0, sizeof_bit_array(BTN_MISC)) 1102 || containsNonZeroByte(device->keyBitmask, sizeof_bit_array(KEY_OK), 1103 sizeof_bit_array(KEY_MAX + 1)); 1104 bool haveGamepadButtons = containsNonZeroByte(device->keyBitmask, sizeof_bit_array(BTN_MISC), 1105 sizeof_bit_array(BTN_MOUSE)) 1106 || containsNonZeroByte(device->keyBitmask, sizeof_bit_array(BTN_JOYSTICK), 1107 sizeof_bit_array(BTN_DIGI)); 1108 if (haveKeyboardKeys || haveGamepadButtons) { 1109 device->classes |= INPUT_DEVICE_CLASS_KEYBOARD; 1110 } 1111 1112 // See if this is a cursor device such as a trackball or mouse. 1113 if (test_bit(BTN_MOUSE, device->keyBitmask) 1114 && test_bit(REL_X, device->relBitmask) 1115 && test_bit(REL_Y, device->relBitmask)) { 1116 device->classes |= INPUT_DEVICE_CLASS_CURSOR; 1117 } 1118 1119 // See if this is a touch pad. 1120 // Is this a new modern multi-touch driver? 1121 if (test_bit(ABS_MT_POSITION_X, device->absBitmask) 1122 && test_bit(ABS_MT_POSITION_Y, device->absBitmask)) { 1123 // Some joysticks such as the PS3 controller report axes that conflict 1124 // with the ABS_MT range. Try to confirm that the device really is 1125 // a touch screen. 1126 if (test_bit(BTN_TOUCH, device->keyBitmask) || !haveGamepadButtons) { 1127 device->classes |= INPUT_DEVICE_CLASS_TOUCH | INPUT_DEVICE_CLASS_TOUCH_MT; 1128 } 1129 // Is this an old style single-touch driver? 1130 } else if (test_bit(BTN_TOUCH, device->keyBitmask) 1131 && test_bit(ABS_X, device->absBitmask) 1132 && test_bit(ABS_Y, device->absBitmask)) { 1133 device->classes |= INPUT_DEVICE_CLASS_TOUCH; 1134 } 1135 1136 // See if this device is a joystick. 1137 // Assumes that joysticks always have gamepad buttons in order to distinguish them 1138 // from other devices such as accelerometers that also have absolute axes. 1139 if (haveGamepadButtons) { 1140 uint32_t assumedClasses = device->classes | INPUT_DEVICE_CLASS_JOYSTICK; 1141 for (int i = 0; i <= ABS_MAX; i++) { 1142 if (test_bit(i, device->absBitmask) 1143 && (getAbsAxisUsage(i, assumedClasses) & INPUT_DEVICE_CLASS_JOYSTICK)) { 1144 device->classes = assumedClasses; 1145 break; 1146 } 1147 } 1148 } 1149 1150 // Check whether this device has switches. 1151 for (int i = 0; i <= SW_MAX; i++) { 1152 if (test_bit(i, device->swBitmask)) { 1153 device->classes |= INPUT_DEVICE_CLASS_SWITCH; 1154 break; 1155 } 1156 } 1157 1158 // Check whether this device supports the vibrator. 1159 if (test_bit(FF_RUMBLE, device->ffBitmask)) { 1160 device->classes |= INPUT_DEVICE_CLASS_VIBRATOR; 1161 } 1162 1163 // Configure virtual keys. 1164 if ((device->classes & INPUT_DEVICE_CLASS_TOUCH)) { 1165 // Load the virtual keys for the touch screen, if any. 1166 // We do this now so that we can make sure to load the keymap if necessary. 1167 status_t status = loadVirtualKeyMapLocked(device); 1168 if (!status) { 1169 device->classes |= INPUT_DEVICE_CLASS_KEYBOARD; 1170 } 1171 } 1172 1173 // Load the key map. 1174 // We need to do this for joysticks too because the key layout may specify axes. 1175 status_t keyMapStatus = NAME_NOT_FOUND; 1176 if (device->classes & (INPUT_DEVICE_CLASS_KEYBOARD | INPUT_DEVICE_CLASS_JOYSTICK)) { 1177 // Load the keymap for the device. 1178 keyMapStatus = loadKeyMapLocked(device); 1179 } 1180 1181 // Configure the keyboard, gamepad or virtual keyboard. 1182 if (device->classes & INPUT_DEVICE_CLASS_KEYBOARD) { 1183 // Register the keyboard as a built-in keyboard if it is eligible. 1184 if (!keyMapStatus 1185 && mBuiltInKeyboardId == NO_BUILT_IN_KEYBOARD 1186 && isEligibleBuiltInKeyboard(device->identifier, 1187 device->configuration, &device->keyMap)) { 1188 mBuiltInKeyboardId = device->id; 1189 } 1190 1191 // 'Q' key support = cheap test of whether this is an alpha-capable kbd 1192 if (hasKeycodeLocked(device, AKEYCODE_Q)) { 1193 device->classes |= INPUT_DEVICE_CLASS_ALPHAKEY; 1194 } 1195 1196 // See if this device has a DPAD. 1197 if (hasKeycodeLocked(device, AKEYCODE_DPAD_UP) && 1198 hasKeycodeLocked(device, AKEYCODE_DPAD_DOWN) && 1199 hasKeycodeLocked(device, AKEYCODE_DPAD_LEFT) && 1200 hasKeycodeLocked(device, AKEYCODE_DPAD_RIGHT) && 1201 hasKeycodeLocked(device, AKEYCODE_DPAD_CENTER)) { 1202 device->classes |= INPUT_DEVICE_CLASS_DPAD; 1203 } 1204 1205 // See if this device has a gamepad. 1206 for (size_t i = 0; i < sizeof(GAMEPAD_KEYCODES)/sizeof(GAMEPAD_KEYCODES[0]); i++) { 1207 if (hasKeycodeLocked(device, GAMEPAD_KEYCODES[i])) { 1208 device->classes |= INPUT_DEVICE_CLASS_GAMEPAD; 1209 break; 1210 } 1211 } 1212 1213 // Disable kernel key repeat since we handle it ourselves 1214 unsigned int repeatRate[] = {0,0}; 1215 if (ioctl(fd, EVIOCSREP, repeatRate)) { 1216 ALOGW("Unable to disable kernel key repeat for %s: %s", devicePath, strerror(errno)); 1217 } 1218 } 1219 1220 // If the device isn't recognized as something we handle, don't monitor it. 1221 if (device->classes == 0) { 1222 ALOGV("Dropping device: id=%d, path='%s', name='%s'", 1223 deviceId, devicePath, device->identifier.name.string()); 1224 delete device; 1225 return -1; 1226 } 1227 1228 // Determine whether the device is external or internal. 1229 if (isExternalDeviceLocked(device)) { 1230 device->classes |= INPUT_DEVICE_CLASS_EXTERNAL; 1231 } 1232 1233 // Register with epoll. 1234 struct epoll_event eventItem; 1235 memset(&eventItem, 0, sizeof(eventItem)); 1236 eventItem.events = EPOLLIN; 1237 eventItem.data.u32 = deviceId; 1238 if (epoll_ctl(mEpollFd, EPOLL_CTL_ADD, fd, &eventItem)) { 1239 ALOGE("Could not add device fd to epoll instance. errno=%d", errno); 1240 delete device; 1241 return -1; 1242 } 1243 1244 // Enable wake-lock behavior on kernels that support it. 1245 // TODO: Only need this for devices that can really wake the system. 1246 bool usingSuspendBlockIoctl = !ioctl(fd, EVIOCSSUSPENDBLOCK, 1); 1247 1248 // Tell the kernel that we want to use the monotonic clock for reporting timestamps 1249 // associated with input events. This is important because the input system 1250 // uses the timestamps extensively and assumes they were recorded using the monotonic 1251 // clock. 1252 // 1253 // In older kernel, before Linux 3.4, there was no way to tell the kernel which 1254 // clock to use to input event timestamps. The standard kernel behavior was to 1255 // record a real time timestamp, which isn't what we want. Android kernels therefore 1256 // contained a patch to the evdev_event() function in drivers/input/evdev.c to 1257 // replace the call to do_gettimeofday() with ktime_get_ts() to cause the monotonic 1258 // clock to be used instead of the real time clock. 1259 // 1260 // As of Linux 3.4, there is a new EVIOCSCLOCKID ioctl to set the desired clock. 1261 // Therefore, we no longer require the Android-specific kernel patch described above 1262 // as long as we make sure to set select the monotonic clock. We do that here. 1263 int clockId = CLOCK_MONOTONIC; 1264 bool usingClockIoctl = !ioctl(fd, EVIOCSCLOCKID, &clockId); 1265 1266 ALOGI("New device: id=%d, fd=%d, path='%s', name='%s', classes=0x%x, " 1267 "configuration='%s', keyLayout='%s', keyCharacterMap='%s', builtinKeyboard=%s, " 1268 "usingSuspendBlockIoctl=%s, usingClockIoctl=%s", 1269 deviceId, fd, devicePath, device->identifier.name.string(), 1270 device->classes, 1271 device->configurationFile.string(), 1272 device->keyMap.keyLayoutFile.string(), 1273 device->keyMap.keyCharacterMapFile.string(), 1274 toString(mBuiltInKeyboardId == deviceId), 1275 toString(usingSuspendBlockIoctl), toString(usingClockIoctl)); 1276 1277 addDeviceLocked(device); 1278 return 0; 1279 } 1280 1281 void EventHub::createVirtualKeyboardLocked() { 1282 InputDeviceIdentifier identifier; 1283 identifier.name = "Virtual"; 1284 identifier.uniqueId = "<virtual>"; 1285 setDescriptor(identifier); 1286 1287 Device* device = new Device(-1, VIRTUAL_KEYBOARD_ID, String8("<virtual>"), identifier); 1288 device->classes = INPUT_DEVICE_CLASS_KEYBOARD 1289 | INPUT_DEVICE_CLASS_ALPHAKEY 1290 | INPUT_DEVICE_CLASS_DPAD 1291 | INPUT_DEVICE_CLASS_VIRTUAL; 1292 loadKeyMapLocked(device); 1293 addDeviceLocked(device); 1294 } 1295 1296 void EventHub::addDeviceLocked(Device* device) { 1297 mDevices.add(device->id, device); 1298 device->next = mOpeningDevices; 1299 mOpeningDevices = device; 1300 } 1301 1302 void EventHub::loadConfigurationLocked(Device* device) { 1303 device->configurationFile = getInputDeviceConfigurationFilePathByDeviceIdentifier( 1304 device->identifier, INPUT_DEVICE_CONFIGURATION_FILE_TYPE_CONFIGURATION); 1305 if (device->configurationFile.isEmpty()) { 1306 ALOGD("No input device configuration file found for device '%s'.", 1307 device->identifier.name.string()); 1308 } else { 1309 status_t status = PropertyMap::load(device->configurationFile, 1310 &device->configuration); 1311 if (status) { 1312 ALOGE("Error loading input device configuration file for device '%s'. " 1313 "Using default configuration.", 1314 device->identifier.name.string()); 1315 } 1316 } 1317 } 1318 1319 status_t EventHub::loadVirtualKeyMapLocked(Device* device) { 1320 // The virtual key map is supplied by the kernel as a system board property file. 1321 String8 path; 1322 path.append("/sys/board_properties/virtualkeys."); 1323 path.append(device->identifier.name); 1324 if (access(path.string(), R_OK)) { 1325 return NAME_NOT_FOUND; 1326 } 1327 return VirtualKeyMap::load(path, &device->virtualKeyMap); 1328 } 1329 1330 status_t EventHub::loadKeyMapLocked(Device* device) { 1331 return device->keyMap.load(device->identifier, device->configuration); 1332 } 1333 1334 bool EventHub::isExternalDeviceLocked(Device* device) { 1335 if (device->configuration) { 1336 bool value; 1337 if (device->configuration->tryGetProperty(String8("device.internal"), value)) { 1338 return !value; 1339 } 1340 } 1341 return device->identifier.bus == BUS_USB || device->identifier.bus == BUS_BLUETOOTH; 1342 } 1343 1344 bool EventHub::hasKeycodeLocked(Device* device, int keycode) const { 1345 if (!device->keyMap.haveKeyLayout() || !device->keyBitmask) { 1346 return false; 1347 } 1348 1349 Vector<int32_t> scanCodes; 1350 device->keyMap.keyLayoutMap->findScanCodesForKey(keycode, &scanCodes); 1351 const size_t N = scanCodes.size(); 1352 for (size_t i=0; i<N && i<=KEY_MAX; i++) { 1353 int32_t sc = scanCodes.itemAt(i); 1354 if (sc >= 0 && sc <= KEY_MAX && test_bit(sc, device->keyBitmask)) { 1355 return true; 1356 } 1357 } 1358 1359 return false; 1360 } 1361 1362 status_t EventHub::closeDeviceByPathLocked(const char *devicePath) { 1363 Device* device = getDeviceByPathLocked(devicePath); 1364 if (device) { 1365 closeDeviceLocked(device); 1366 return 0; 1367 } 1368 ALOGV("Remove device: %s not found, device may already have been removed.", devicePath); 1369 return -1; 1370 } 1371 1372 void EventHub::closeAllDevicesLocked() { 1373 while (mDevices.size() > 0) { 1374 closeDeviceLocked(mDevices.valueAt(mDevices.size() - 1)); 1375 } 1376 } 1377 1378 void EventHub::closeDeviceLocked(Device* device) { 1379 ALOGI("Removed device: path=%s name=%s id=%d fd=%d classes=0x%x\n", 1380 device->path.string(), device->identifier.name.string(), device->id, 1381 device->fd, device->classes); 1382 1383 if (device->id == mBuiltInKeyboardId) { 1384 ALOGW("built-in keyboard device %s (id=%d) is closing! the apps will not like this", 1385 device->path.string(), mBuiltInKeyboardId); 1386 mBuiltInKeyboardId = NO_BUILT_IN_KEYBOARD; 1387 } 1388 1389 if (!device->isVirtual()) { 1390 if (epoll_ctl(mEpollFd, EPOLL_CTL_DEL, device->fd, NULL)) { 1391 ALOGW("Could not remove device fd from epoll instance. errno=%d", errno); 1392 } 1393 } 1394 1395 mDevices.removeItem(device->id); 1396 device->close(); 1397 1398 // Unlink for opening devices list if it is present. 1399 Device* pred = NULL; 1400 bool found = false; 1401 for (Device* entry = mOpeningDevices; entry != NULL; ) { 1402 if (entry == device) { 1403 found = true; 1404 break; 1405 } 1406 pred = entry; 1407 entry = entry->next; 1408 } 1409 if (found) { 1410 // Unlink the device from the opening devices list then delete it. 1411 // We don't need to tell the client that the device was closed because 1412 // it does not even know it was opened in the first place. 1413 ALOGI("Device %s was immediately closed after opening.", device->path.string()); 1414 if (pred) { 1415 pred->next = device->next; 1416 } else { 1417 mOpeningDevices = device->next; 1418 } 1419 delete device; 1420 } else { 1421 // Link into closing devices list. 1422 // The device will be deleted later after we have informed the client. 1423 device->next = mClosingDevices; 1424 mClosingDevices = device; 1425 } 1426 } 1427 1428 status_t EventHub::readNotifyLocked() { 1429 int res; 1430 char devname[PATH_MAX]; 1431 char *filename; 1432 char event_buf[512]; 1433 int event_size; 1434 int event_pos = 0; 1435 struct inotify_event *event; 1436 1437 ALOGV("EventHub::readNotify nfd: %d\n", mINotifyFd); 1438 res = read(mINotifyFd, event_buf, sizeof(event_buf)); 1439 if(res < (int)sizeof(*event)) { 1440 if(errno == EINTR) 1441 return 0; 1442 ALOGW("could not get event, %s\n", strerror(errno)); 1443 return -1; 1444 } 1445 //printf("got %d bytes of event information\n", res); 1446 1447 strcpy(devname, DEVICE_PATH); 1448 filename = devname + strlen(devname); 1449 *filename++ = '/'; 1450 1451 while(res >= (int)sizeof(*event)) { 1452 event = (struct inotify_event *)(event_buf + event_pos); 1453 //printf("%d: %08x \"%s\"\n", event->wd, event->mask, event->len ? event->name : ""); 1454 if(event->len) { 1455 strcpy(filename, event->name); 1456 if(event->mask & IN_CREATE) { 1457 openDeviceLocked(devname); 1458 } else { 1459 ALOGI("Removing device '%s' due to inotify event\n", devname); 1460 closeDeviceByPathLocked(devname); 1461 } 1462 } 1463 event_size = sizeof(*event) + event->len; 1464 res -= event_size; 1465 event_pos += event_size; 1466 } 1467 return 0; 1468 } 1469 1470 status_t EventHub::scanDirLocked(const char *dirname) 1471 { 1472 char devname[PATH_MAX]; 1473 char *filename; 1474 DIR *dir; 1475 struct dirent *de; 1476 dir = opendir(dirname); 1477 if(dir == NULL) 1478 return -1; 1479 strcpy(devname, dirname); 1480 filename = devname + strlen(devname); 1481 *filename++ = '/'; 1482 while((de = readdir(dir))) { 1483 if(de->d_name[0] == '.' && 1484 (de->d_name[1] == '\0' || 1485 (de->d_name[1] == '.' && de->d_name[2] == '\0'))) 1486 continue; 1487 strcpy(filename, de->d_name); 1488 openDeviceLocked(devname); 1489 } 1490 closedir(dir); 1491 return 0; 1492 } 1493 1494 void EventHub::requestReopenDevices() { 1495 ALOGV("requestReopenDevices() called"); 1496 1497 AutoMutex _l(mLock); 1498 mNeedToReopenDevices = true; 1499 } 1500 1501 void EventHub::dump(String8& dump) { 1502 dump.append("Event Hub State:\n"); 1503 1504 { // acquire lock 1505 AutoMutex _l(mLock); 1506 1507 dump.appendFormat(INDENT "BuiltInKeyboardId: %d\n", mBuiltInKeyboardId); 1508 1509 dump.append(INDENT "Devices:\n"); 1510 1511 for (size_t i = 0; i < mDevices.size(); i++) { 1512 const Device* device = mDevices.valueAt(i); 1513 if (mBuiltInKeyboardId == device->id) { 1514 dump.appendFormat(INDENT2 "%d: %s (aka device 0 - built-in keyboard)\n", 1515 device->id, device->identifier.name.string()); 1516 } else { 1517 dump.appendFormat(INDENT2 "%d: %s\n", device->id, 1518 device->identifier.name.string()); 1519 } 1520 dump.appendFormat(INDENT3 "Classes: 0x%08x\n", device->classes); 1521 dump.appendFormat(INDENT3 "Path: %s\n", device->path.string()); 1522 dump.appendFormat(INDENT3 "Descriptor: %s\n", device->identifier.descriptor.string()); 1523 dump.appendFormat(INDENT3 "Location: %s\n", device->identifier.location.string()); 1524 dump.appendFormat(INDENT3 "UniqueId: %s\n", device->identifier.uniqueId.string()); 1525 dump.appendFormat(INDENT3 "Identifier: bus=0x%04x, vendor=0x%04x, " 1526 "product=0x%04x, version=0x%04x\n", 1527 device->identifier.bus, device->identifier.vendor, 1528 device->identifier.product, device->identifier.version); 1529 dump.appendFormat(INDENT3 "KeyLayoutFile: %s\n", 1530 device->keyMap.keyLayoutFile.string()); 1531 dump.appendFormat(INDENT3 "KeyCharacterMapFile: %s\n", 1532 device->keyMap.keyCharacterMapFile.string()); 1533 dump.appendFormat(INDENT3 "ConfigurationFile: %s\n", 1534 device->configurationFile.string()); 1535 dump.appendFormat(INDENT3 "HaveKeyboardLayoutOverlay: %s\n", 1536 toString(device->overlayKeyMap != NULL)); 1537 } 1538 } // release lock 1539 } 1540 1541 void EventHub::monitor() { 1542 // Acquire and release the lock to ensure that the event hub has not deadlocked. 1543 mLock.lock(); 1544 mLock.unlock(); 1545 } 1546 1547 1548 }; // namespace android 1549
