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 <sha1.h> 44 #include <string.h> 45 #include <stdint.h> 46 #include <dirent.h> 47 48 #include <sys/inotify.h> 49 #include <sys/epoll.h> 50 #include <sys/ioctl.h> 51 #include <sys/limits.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 memset(keyBitmask, 0, sizeof(keyBitmask)); 167 memset(absBitmask, 0, sizeof(absBitmask)); 168 memset(relBitmask, 0, sizeof(relBitmask)); 169 memset(swBitmask, 0, sizeof(swBitmask)); 170 memset(ledBitmask, 0, sizeof(ledBitmask)); 171 memset(ffBitmask, 0, sizeof(ffBitmask)); 172 memset(propBitmask, 0, sizeof(propBitmask)); 173 } 174 175 EventHub::Device::~Device() { 176 close(); 177 delete configuration; 178 delete virtualKeyMap; 179 } 180 181 void EventHub::Device::close() { 182 if (fd >= 0) { 183 ::close(fd); 184 fd = -1; 185 } 186 } 187 188 189 // --- EventHub --- 190 191 const uint32_t EventHub::EPOLL_ID_INOTIFY; 192 const uint32_t EventHub::EPOLL_ID_WAKE; 193 const int EventHub::EPOLL_SIZE_HINT; 194 const int EventHub::EPOLL_MAX_EVENTS; 195 196 EventHub::EventHub(void) : 197 mBuiltInKeyboardId(NO_BUILT_IN_KEYBOARD), mNextDeviceId(1), 198 mOpeningDevices(0), mClosingDevices(0), 199 mNeedToSendFinishedDeviceScan(false), 200 mNeedToReopenDevices(false), mNeedToScanDevices(true), 201 mPendingEventCount(0), mPendingEventIndex(0), mPendingINotify(false) { 202 acquire_wake_lock(PARTIAL_WAKE_LOCK, WAKE_LOCK_ID); 203 204 mEpollFd = epoll_create(EPOLL_SIZE_HINT); 205 LOG_ALWAYS_FATAL_IF(mEpollFd < 0, "Could not create epoll instance. errno=%d", errno); 206 207 mINotifyFd = inotify_init(); 208 int result = inotify_add_watch(mINotifyFd, DEVICE_PATH, IN_DELETE | IN_CREATE); 209 LOG_ALWAYS_FATAL_IF(result < 0, "Could not register INotify for %s. errno=%d", 210 DEVICE_PATH, errno); 211 212 struct epoll_event eventItem; 213 memset(&eventItem, 0, sizeof(eventItem)); 214 eventItem.events = EPOLLIN; 215 eventItem.data.u32 = EPOLL_ID_INOTIFY; 216 result = epoll_ctl(mEpollFd, EPOLL_CTL_ADD, mINotifyFd, &eventItem); 217 LOG_ALWAYS_FATAL_IF(result != 0, "Could not add INotify to epoll instance. errno=%d", errno); 218 219 int wakeFds[2]; 220 result = pipe(wakeFds); 221 LOG_ALWAYS_FATAL_IF(result != 0, "Could not create wake pipe. errno=%d", errno); 222 223 mWakeReadPipeFd = wakeFds[0]; 224 mWakeWritePipeFd = wakeFds[1]; 225 226 result = fcntl(mWakeReadPipeFd, F_SETFL, O_NONBLOCK); 227 LOG_ALWAYS_FATAL_IF(result != 0, "Could not make wake read pipe non-blocking. errno=%d", 228 errno); 229 230 result = fcntl(mWakeWritePipeFd, F_SETFL, O_NONBLOCK); 231 LOG_ALWAYS_FATAL_IF(result != 0, "Could not make wake write pipe non-blocking. errno=%d", 232 errno); 233 234 eventItem.data.u32 = EPOLL_ID_WAKE; 235 result = epoll_ctl(mEpollFd, EPOLL_CTL_ADD, mWakeReadPipeFd, &eventItem); 236 LOG_ALWAYS_FATAL_IF(result != 0, "Could not add wake read pipe to epoll instance. errno=%d", 237 errno); 238 } 239 240 EventHub::~EventHub(void) { 241 closeAllDevicesLocked(); 242 243 while (mClosingDevices) { 244 Device* device = mClosingDevices; 245 mClosingDevices = device->next; 246 delete device; 247 } 248 249 ::close(mEpollFd); 250 ::close(mINotifyFd); 251 ::close(mWakeReadPipeFd); 252 ::close(mWakeWritePipeFd); 253 254 release_wake_lock(WAKE_LOCK_ID); 255 } 256 257 InputDeviceIdentifier EventHub::getDeviceIdentifier(int32_t deviceId) const { 258 AutoMutex _l(mLock); 259 Device* device = getDeviceLocked(deviceId); 260 if (device == NULL) return InputDeviceIdentifier(); 261 return device->identifier; 262 } 263 264 uint32_t EventHub::getDeviceClasses(int32_t deviceId) const { 265 AutoMutex _l(mLock); 266 Device* device = getDeviceLocked(deviceId); 267 if (device == NULL) return 0; 268 return device->classes; 269 } 270 271 void EventHub::getConfiguration(int32_t deviceId, PropertyMap* outConfiguration) const { 272 AutoMutex _l(mLock); 273 Device* device = getDeviceLocked(deviceId); 274 if (device && device->configuration) { 275 *outConfiguration = *device->configuration; 276 } else { 277 outConfiguration->clear(); 278 } 279 } 280 281 status_t EventHub::getAbsoluteAxisInfo(int32_t deviceId, int axis, 282 RawAbsoluteAxisInfo* outAxisInfo) const { 283 outAxisInfo->clear(); 284 285 if (axis >= 0 && axis <= ABS_MAX) { 286 AutoMutex _l(mLock); 287 288 Device* device = getDeviceLocked(deviceId); 289 if (device && !device->isVirtual() && test_bit(axis, device->absBitmask)) { 290 struct input_absinfo info; 291 if(ioctl(device->fd, EVIOCGABS(axis), &info)) { 292 ALOGW("Error reading absolute controller %d for device %s fd %d, errno=%d", 293 axis, device->identifier.name.string(), device->fd, errno); 294 return -errno; 295 } 296 297 if (info.minimum != info.maximum) { 298 outAxisInfo->valid = true; 299 outAxisInfo->minValue = info.minimum; 300 outAxisInfo->maxValue = info.maximum; 301 outAxisInfo->flat = info.flat; 302 outAxisInfo->fuzz = info.fuzz; 303 outAxisInfo->resolution = info.resolution; 304 } 305 return OK; 306 } 307 } 308 return -1; 309 } 310 311 bool EventHub::hasRelativeAxis(int32_t deviceId, int axis) const { 312 if (axis >= 0 && axis <= REL_MAX) { 313 AutoMutex _l(mLock); 314 315 Device* device = getDeviceLocked(deviceId); 316 if (device) { 317 return test_bit(axis, device->relBitmask); 318 } 319 } 320 return false; 321 } 322 323 bool EventHub::hasInputProperty(int32_t deviceId, int property) const { 324 if (property >= 0 && property <= INPUT_PROP_MAX) { 325 AutoMutex _l(mLock); 326 327 Device* device = getDeviceLocked(deviceId); 328 if (device) { 329 return test_bit(property, device->propBitmask); 330 } 331 } 332 return false; 333 } 334 335 int32_t EventHub::getScanCodeState(int32_t deviceId, int32_t scanCode) const { 336 if (scanCode >= 0 && scanCode <= KEY_MAX) { 337 AutoMutex _l(mLock); 338 339 Device* device = getDeviceLocked(deviceId); 340 if (device && !device->isVirtual() && test_bit(scanCode, device->keyBitmask)) { 341 uint8_t keyState[sizeof_bit_array(KEY_MAX + 1)]; 342 memset(keyState, 0, sizeof(keyState)); 343 if (ioctl(device->fd, EVIOCGKEY(sizeof(keyState)), keyState) >= 0) { 344 return test_bit(scanCode, keyState) ? AKEY_STATE_DOWN : AKEY_STATE_UP; 345 } 346 } 347 } 348 return AKEY_STATE_UNKNOWN; 349 } 350 351 int32_t EventHub::getKeyCodeState(int32_t deviceId, int32_t keyCode) const { 352 AutoMutex _l(mLock); 353 354 Device* device = getDeviceLocked(deviceId); 355 if (device && !device->isVirtual() && device->keyMap.haveKeyLayout()) { 356 Vector<int32_t> scanCodes; 357 device->keyMap.keyLayoutMap->findScanCodesForKey(keyCode, &scanCodes); 358 if (scanCodes.size() != 0) { 359 uint8_t keyState[sizeof_bit_array(KEY_MAX + 1)]; 360 memset(keyState, 0, sizeof(keyState)); 361 if (ioctl(device->fd, EVIOCGKEY(sizeof(keyState)), keyState) >= 0) { 362 for (size_t i = 0; i < scanCodes.size(); i++) { 363 int32_t sc = scanCodes.itemAt(i); 364 if (sc >= 0 && sc <= KEY_MAX && test_bit(sc, keyState)) { 365 return AKEY_STATE_DOWN; 366 } 367 } 368 return AKEY_STATE_UP; 369 } 370 } 371 } 372 return AKEY_STATE_UNKNOWN; 373 } 374 375 int32_t EventHub::getSwitchState(int32_t deviceId, int32_t sw) const { 376 if (sw >= 0 && sw <= SW_MAX) { 377 AutoMutex _l(mLock); 378 379 Device* device = getDeviceLocked(deviceId); 380 if (device && !device->isVirtual() && test_bit(sw, device->swBitmask)) { 381 uint8_t swState[sizeof_bit_array(SW_MAX + 1)]; 382 memset(swState, 0, sizeof(swState)); 383 if (ioctl(device->fd, EVIOCGSW(sizeof(swState)), swState) >= 0) { 384 return test_bit(sw, swState) ? AKEY_STATE_DOWN : AKEY_STATE_UP; 385 } 386 } 387 } 388 return AKEY_STATE_UNKNOWN; 389 } 390 391 status_t EventHub::getAbsoluteAxisValue(int32_t deviceId, int32_t axis, int32_t* outValue) const { 392 *outValue = 0; 393 394 if (axis >= 0 && axis <= ABS_MAX) { 395 AutoMutex _l(mLock); 396 397 Device* device = getDeviceLocked(deviceId); 398 if (device && !device->isVirtual() && test_bit(axis, device->absBitmask)) { 399 struct input_absinfo info; 400 if(ioctl(device->fd, EVIOCGABS(axis), &info)) { 401 ALOGW("Error reading absolute controller %d for device %s fd %d, errno=%d", 402 axis, device->identifier.name.string(), device->fd, errno); 403 return -errno; 404 } 405 406 *outValue = info.value; 407 return OK; 408 } 409 } 410 return -1; 411 } 412 413 bool EventHub::markSupportedKeyCodes(int32_t deviceId, size_t numCodes, 414 const int32_t* keyCodes, uint8_t* outFlags) const { 415 AutoMutex _l(mLock); 416 417 Device* device = getDeviceLocked(deviceId); 418 if (device && device->keyMap.haveKeyLayout()) { 419 Vector<int32_t> scanCodes; 420 for (size_t codeIndex = 0; codeIndex < numCodes; codeIndex++) { 421 scanCodes.clear(); 422 423 status_t err = device->keyMap.keyLayoutMap->findScanCodesForKey( 424 keyCodes[codeIndex], &scanCodes); 425 if (! err) { 426 // check the possible scan codes identified by the layout map against the 427 // map of codes actually emitted by the driver 428 for (size_t sc = 0; sc < scanCodes.size(); sc++) { 429 if (test_bit(scanCodes[sc], device->keyBitmask)) { 430 outFlags[codeIndex] = 1; 431 break; 432 } 433 } 434 } 435 } 436 return true; 437 } 438 return false; 439 } 440 441 status_t EventHub::mapKey(int32_t deviceId, int32_t scanCode, int32_t usageCode, 442 int32_t* outKeycode, uint32_t* outFlags) const { 443 AutoMutex _l(mLock); 444 Device* device = getDeviceLocked(deviceId); 445 446 if (device) { 447 // Check the key character map first. 448 sp<KeyCharacterMap> kcm = device->getKeyCharacterMap(); 449 if (kcm != NULL) { 450 if (!kcm->mapKey(scanCode, usageCode, outKeycode)) { 451 *outFlags = 0; 452 return NO_ERROR; 453 } 454 } 455 456 // Check the key layout next. 457 if (device->keyMap.haveKeyLayout()) { 458 if (!device->keyMap.keyLayoutMap->mapKey( 459 scanCode, usageCode, outKeycode, outFlags)) { 460 return NO_ERROR; 461 } 462 } 463 } 464 465 *outKeycode = 0; 466 *outFlags = 0; 467 return NAME_NOT_FOUND; 468 } 469 470 status_t EventHub::mapAxis(int32_t deviceId, int32_t scanCode, AxisInfo* outAxisInfo) const { 471 AutoMutex _l(mLock); 472 Device* device = getDeviceLocked(deviceId); 473 474 if (device && device->keyMap.haveKeyLayout()) { 475 status_t err = device->keyMap.keyLayoutMap->mapAxis(scanCode, outAxisInfo); 476 if (err == NO_ERROR) { 477 return NO_ERROR; 478 } 479 } 480 481 return NAME_NOT_FOUND; 482 } 483 484 void EventHub::setExcludedDevices(const Vector<String8>& devices) { 485 AutoMutex _l(mLock); 486 487 mExcludedDevices = devices; 488 } 489 490 bool EventHub::hasScanCode(int32_t deviceId, int32_t scanCode) const { 491 AutoMutex _l(mLock); 492 Device* device = getDeviceLocked(deviceId); 493 if (device && scanCode >= 0 && scanCode <= KEY_MAX) { 494 if (test_bit(scanCode, device->keyBitmask)) { 495 return true; 496 } 497 } 498 return false; 499 } 500 501 bool EventHub::hasLed(int32_t deviceId, int32_t led) const { 502 AutoMutex _l(mLock); 503 Device* device = getDeviceLocked(deviceId); 504 if (device && led >= 0 && led <= LED_MAX) { 505 if (test_bit(led, device->ledBitmask)) { 506 return true; 507 } 508 } 509 return false; 510 } 511 512 void EventHub::setLedState(int32_t deviceId, int32_t led, bool on) { 513 AutoMutex _l(mLock); 514 Device* device = getDeviceLocked(deviceId); 515 if (device && !device->isVirtual() && led >= 0 && led <= LED_MAX) { 516 struct input_event ev; 517 ev.time.tv_sec = 0; 518 ev.time.tv_usec = 0; 519 ev.type = EV_LED; 520 ev.code = led; 521 ev.value = on ? 1 : 0; 522 523 ssize_t nWrite; 524 do { 525 nWrite = write(device->fd, &ev, sizeof(struct input_event)); 526 } while (nWrite == -1 && errno == EINTR); 527 } 528 } 529 530 void EventHub::getVirtualKeyDefinitions(int32_t deviceId, 531 Vector<VirtualKeyDefinition>& outVirtualKeys) const { 532 outVirtualKeys.clear(); 533 534 AutoMutex _l(mLock); 535 Device* device = getDeviceLocked(deviceId); 536 if (device && device->virtualKeyMap) { 537 outVirtualKeys.appendVector(device->virtualKeyMap->getVirtualKeys()); 538 } 539 } 540 541 sp<KeyCharacterMap> EventHub::getKeyCharacterMap(int32_t deviceId) const { 542 AutoMutex _l(mLock); 543 Device* device = getDeviceLocked(deviceId); 544 if (device) { 545 return device->getKeyCharacterMap(); 546 } 547 return NULL; 548 } 549 550 bool EventHub::setKeyboardLayoutOverlay(int32_t deviceId, 551 const sp<KeyCharacterMap>& map) { 552 AutoMutex _l(mLock); 553 Device* device = getDeviceLocked(deviceId); 554 if (device) { 555 if (map != device->overlayKeyMap) { 556 device->overlayKeyMap = map; 557 device->combinedKeyMap = KeyCharacterMap::combine( 558 device->keyMap.keyCharacterMap, map); 559 return true; 560 } 561 } 562 return false; 563 } 564 565 void EventHub::vibrate(int32_t deviceId, nsecs_t duration) { 566 AutoMutex _l(mLock); 567 Device* device = getDeviceLocked(deviceId); 568 if (device && !device->isVirtual()) { 569 ff_effect effect; 570 memset(&effect, 0, sizeof(effect)); 571 effect.type = FF_RUMBLE; 572 effect.id = device->ffEffectId; 573 effect.u.rumble.strong_magnitude = 0xc000; 574 effect.u.rumble.weak_magnitude = 0xc000; 575 effect.replay.length = (duration + 999999LL) / 1000000LL; 576 effect.replay.delay = 0; 577 if (ioctl(device->fd, EVIOCSFF, &effect)) { 578 ALOGW("Could not upload force feedback effect to device %s due to error %d.", 579 device->identifier.name.string(), errno); 580 return; 581 } 582 device->ffEffectId = effect.id; 583 584 struct input_event ev; 585 ev.time.tv_sec = 0; 586 ev.time.tv_usec = 0; 587 ev.type = EV_FF; 588 ev.code = device->ffEffectId; 589 ev.value = 1; 590 if (write(device->fd, &ev, sizeof(ev)) != sizeof(ev)) { 591 ALOGW("Could not start force feedback effect on device %s due to error %d.", 592 device->identifier.name.string(), errno); 593 return; 594 } 595 device->ffEffectPlaying = true; 596 } 597 } 598 599 void EventHub::cancelVibrate(int32_t deviceId) { 600 AutoMutex _l(mLock); 601 Device* device = getDeviceLocked(deviceId); 602 if (device && !device->isVirtual()) { 603 if (device->ffEffectPlaying) { 604 device->ffEffectPlaying = false; 605 606 struct input_event ev; 607 ev.time.tv_sec = 0; 608 ev.time.tv_usec = 0; 609 ev.type = EV_FF; 610 ev.code = device->ffEffectId; 611 ev.value = 0; 612 if (write(device->fd, &ev, sizeof(ev)) != sizeof(ev)) { 613 ALOGW("Could not stop force feedback effect on device %s due to error %d.", 614 device->identifier.name.string(), errno); 615 return; 616 } 617 } 618 } 619 } 620 621 EventHub::Device* EventHub::getDeviceLocked(int32_t deviceId) const { 622 if (deviceId == BUILT_IN_KEYBOARD_ID) { 623 deviceId = mBuiltInKeyboardId; 624 } 625 ssize_t index = mDevices.indexOfKey(deviceId); 626 return index >= 0 ? mDevices.valueAt(index) : NULL; 627 } 628 629 EventHub::Device* EventHub::getDeviceByPathLocked(const char* devicePath) const { 630 for (size_t i = 0; i < mDevices.size(); i++) { 631 Device* device = mDevices.valueAt(i); 632 if (device->path == devicePath) { 633 return device; 634 } 635 } 636 return NULL; 637 } 638 639 size_t EventHub::getEvents(int timeoutMillis, RawEvent* buffer, size_t bufferSize) { 640 ALOG_ASSERT(bufferSize >= 1); 641 642 AutoMutex _l(mLock); 643 644 struct input_event readBuffer[bufferSize]; 645 646 RawEvent* event = buffer; 647 size_t capacity = bufferSize; 648 bool awoken = false; 649 for (;;) { 650 nsecs_t now = systemTime(SYSTEM_TIME_MONOTONIC); 651 652 // Reopen input devices if needed. 653 if (mNeedToReopenDevices) { 654 mNeedToReopenDevices = false; 655 656 ALOGI("Reopening all input devices due to a configuration change."); 657 658 closeAllDevicesLocked(); 659 mNeedToScanDevices = true; 660 break; // return to the caller before we actually rescan 661 } 662 663 // Report any devices that had last been added/removed. 664 while (mClosingDevices) { 665 Device* device = mClosingDevices; 666 ALOGV("Reporting device closed: id=%d, name=%s\n", 667 device->id, device->path.string()); 668 mClosingDevices = device->next; 669 event->when = now; 670 event->deviceId = device->id == mBuiltInKeyboardId ? BUILT_IN_KEYBOARD_ID : device->id; 671 event->type = DEVICE_REMOVED; 672 event += 1; 673 delete device; 674 mNeedToSendFinishedDeviceScan = true; 675 if (--capacity == 0) { 676 break; 677 } 678 } 679 680 if (mNeedToScanDevices) { 681 mNeedToScanDevices = false; 682 scanDevicesLocked(); 683 mNeedToSendFinishedDeviceScan = true; 684 } 685 686 while (mOpeningDevices != NULL) { 687 Device* device = mOpeningDevices; 688 ALOGV("Reporting device opened: id=%d, name=%s\n", 689 device->id, device->path.string()); 690 mOpeningDevices = device->next; 691 event->when = now; 692 event->deviceId = device->id == mBuiltInKeyboardId ? 0 : device->id; 693 event->type = DEVICE_ADDED; 694 event += 1; 695 mNeedToSendFinishedDeviceScan = true; 696 if (--capacity == 0) { 697 break; 698 } 699 } 700 701 if (mNeedToSendFinishedDeviceScan) { 702 mNeedToSendFinishedDeviceScan = false; 703 event->when = now; 704 event->type = FINISHED_DEVICE_SCAN; 705 event += 1; 706 if (--capacity == 0) { 707 break; 708 } 709 } 710 711 // Grab the next input event. 712 bool deviceChanged = false; 713 while (mPendingEventIndex < mPendingEventCount) { 714 const struct epoll_event& eventItem = mPendingEventItems[mPendingEventIndex++]; 715 if (eventItem.data.u32 == EPOLL_ID_INOTIFY) { 716 if (eventItem.events & EPOLLIN) { 717 mPendingINotify = true; 718 } else { 719 ALOGW("Received unexpected epoll event 0x%08x for INotify.", eventItem.events); 720 } 721 continue; 722 } 723 724 if (eventItem.data.u32 == EPOLL_ID_WAKE) { 725 if (eventItem.events & EPOLLIN) { 726 ALOGV("awoken after wake()"); 727 awoken = true; 728 char buffer[16]; 729 ssize_t nRead; 730 do { 731 nRead = read(mWakeReadPipeFd, buffer, sizeof(buffer)); 732 } while ((nRead == -1 && errno == EINTR) || nRead == sizeof(buffer)); 733 } else { 734 ALOGW("Received unexpected epoll event 0x%08x for wake read pipe.", 735 eventItem.events); 736 } 737 continue; 738 } 739 740 ssize_t deviceIndex = mDevices.indexOfKey(eventItem.data.u32); 741 if (deviceIndex < 0) { 742 ALOGW("Received unexpected epoll event 0x%08x for unknown device id %d.", 743 eventItem.events, eventItem.data.u32); 744 continue; 745 } 746 747 Device* device = mDevices.valueAt(deviceIndex); 748 if (eventItem.events & EPOLLIN) { 749 int32_t readSize = read(device->fd, readBuffer, 750 sizeof(struct input_event) * capacity); 751 if (readSize == 0 || (readSize < 0 && errno == ENODEV)) { 752 // Device was removed before INotify noticed. 753 ALOGW("could not get event, removed? (fd: %d size: %d bufferSize: %d " 754 "capacity: %d errno: %d)\n", 755 device->fd, readSize, bufferSize, capacity, errno); 756 deviceChanged = true; 757 closeDeviceLocked(device); 758 } else if (readSize < 0) { 759 if (errno != EAGAIN && errno != EINTR) { 760 ALOGW("could not get event (errno=%d)", errno); 761 } 762 } else if ((readSize % sizeof(struct input_event)) != 0) { 763 ALOGE("could not get event (wrong size: %d)", readSize); 764 } else { 765 int32_t deviceId = device->id == mBuiltInKeyboardId ? 0 : device->id; 766 767 size_t count = size_t(readSize) / sizeof(struct input_event); 768 for (size_t i = 0; i < count; i++) { 769 const struct input_event& iev = readBuffer[i]; 770 ALOGV("%s got: t0=%d, t1=%d, type=%d, code=%d, value=%d", 771 device->path.string(), 772 (int) iev.time.tv_sec, (int) iev.time.tv_usec, 773 iev.type, iev.code, iev.value); 774 775 #ifdef HAVE_POSIX_CLOCKS 776 // Use the time specified in the event instead of the current time 777 // so that downstream code can get more accurate estimates of 778 // event dispatch latency from the time the event is enqueued onto 779 // the evdev client buffer. 780 // 781 // The event's timestamp fortuitously uses the same monotonic clock 782 // time base as the rest of Android. The kernel event device driver 783 // (drivers/input/evdev.c) obtains timestamps using ktime_get_ts(). 784 // The systemTime(SYSTEM_TIME_MONOTONIC) function we use everywhere 785 // calls clock_gettime(CLOCK_MONOTONIC) which is implemented as a 786 // system call that also queries ktime_get_ts(). 787 event->when = nsecs_t(iev.time.tv_sec) * 1000000000LL 788 + nsecs_t(iev.time.tv_usec) * 1000LL; 789 ALOGV("event time %lld, now %lld", event->when, now); 790 #else 791 event->when = now; 792 #endif 793 event->deviceId = deviceId; 794 event->type = iev.type; 795 event->code = iev.code; 796 event->value = iev.value; 797 event += 1; 798 } 799 capacity -= count; 800 if (capacity == 0) { 801 // The result buffer is full. Reset the pending event index 802 // so we will try to read the device again on the next iteration. 803 mPendingEventIndex -= 1; 804 break; 805 } 806 } 807 } else if (eventItem.events & EPOLLHUP) { 808 ALOGI("Removing device %s due to epoll hang-up event.", 809 device->identifier.name.string()); 810 deviceChanged = true; 811 closeDeviceLocked(device); 812 } else { 813 ALOGW("Received unexpected epoll event 0x%08x for device %s.", 814 eventItem.events, device->identifier.name.string()); 815 } 816 } 817 818 // readNotify() will modify the list of devices so this must be done after 819 // processing all other events to ensure that we read all remaining events 820 // before closing the devices. 821 if (mPendingINotify && mPendingEventIndex >= mPendingEventCount) { 822 mPendingINotify = false; 823 readNotifyLocked(); 824 deviceChanged = true; 825 } 826 827 // Report added or removed devices immediately. 828 if (deviceChanged) { 829 continue; 830 } 831 832 // Return now if we have collected any events or if we were explicitly awoken. 833 if (event != buffer || awoken) { 834 break; 835 } 836 837 // Poll for events. Mind the wake lock dance! 838 // We hold a wake lock at all times except during epoll_wait(). This works due to some 839 // subtle choreography. When a device driver has pending (unread) events, it acquires 840 // a kernel wake lock. However, once the last pending event has been read, the device 841 // driver will release the kernel wake lock. To prevent the system from going to sleep 842 // when this happens, the EventHub holds onto its own user wake lock while the client 843 // is processing events. Thus the system can only sleep if there are no events 844 // pending or currently being processed. 845 // 846 // The timeout is advisory only. If the device is asleep, it will not wake just to 847 // service the timeout. 848 mPendingEventIndex = 0; 849 850 mLock.unlock(); // release lock before poll, must be before release_wake_lock 851 release_wake_lock(WAKE_LOCK_ID); 852 853 int pollResult = epoll_wait(mEpollFd, mPendingEventItems, EPOLL_MAX_EVENTS, timeoutMillis); 854 855 acquire_wake_lock(PARTIAL_WAKE_LOCK, WAKE_LOCK_ID); 856 mLock.lock(); // reacquire lock after poll, must be after acquire_wake_lock 857 858 if (pollResult == 0) { 859 // Timed out. 860 mPendingEventCount = 0; 861 break; 862 } 863 864 if (pollResult < 0) { 865 // An error occurred. 866 mPendingEventCount = 0; 867 868 // Sleep after errors to avoid locking up the system. 869 // Hopefully the error is transient. 870 if (errno != EINTR) { 871 ALOGW("poll failed (errno=%d)\n", errno); 872 usleep(100000); 873 } 874 } else { 875 // Some events occurred. 876 mPendingEventCount = size_t(pollResult); 877 } 878 } 879 880 // All done, return the number of events we read. 881 return event - buffer; 882 } 883 884 void EventHub::wake() { 885 ALOGV("wake() called"); 886 887 ssize_t nWrite; 888 do { 889 nWrite = write(mWakeWritePipeFd, "W", 1); 890 } while (nWrite == -1 && errno == EINTR); 891 892 if (nWrite != 1 && errno != EAGAIN) { 893 ALOGW("Could not write wake signal, errno=%d", errno); 894 } 895 } 896 897 void EventHub::scanDevicesLocked() { 898 status_t res = scanDirLocked(DEVICE_PATH); 899 if(res < 0) { 900 ALOGE("scan dir failed for %s\n", DEVICE_PATH); 901 } 902 if (mDevices.indexOfKey(VIRTUAL_KEYBOARD_ID) < 0) { 903 createVirtualKeyboardLocked(); 904 } 905 } 906 907 // ---------------------------------------------------------------------------- 908 909 static bool containsNonZeroByte(const uint8_t* array, uint32_t startIndex, uint32_t endIndex) { 910 const uint8_t* end = array + endIndex; 911 array += startIndex; 912 while (array != end) { 913 if (*(array++) != 0) { 914 return true; 915 } 916 } 917 return false; 918 } 919 920 static const int32_t GAMEPAD_KEYCODES[] = { 921 AKEYCODE_BUTTON_A, AKEYCODE_BUTTON_B, AKEYCODE_BUTTON_C, 922 AKEYCODE_BUTTON_X, AKEYCODE_BUTTON_Y, AKEYCODE_BUTTON_Z, 923 AKEYCODE_BUTTON_L1, AKEYCODE_BUTTON_R1, 924 AKEYCODE_BUTTON_L2, AKEYCODE_BUTTON_R2, 925 AKEYCODE_BUTTON_THUMBL, AKEYCODE_BUTTON_THUMBR, 926 AKEYCODE_BUTTON_START, AKEYCODE_BUTTON_SELECT, AKEYCODE_BUTTON_MODE, 927 AKEYCODE_BUTTON_1, AKEYCODE_BUTTON_2, AKEYCODE_BUTTON_3, AKEYCODE_BUTTON_4, 928 AKEYCODE_BUTTON_5, AKEYCODE_BUTTON_6, AKEYCODE_BUTTON_7, AKEYCODE_BUTTON_8, 929 AKEYCODE_BUTTON_9, AKEYCODE_BUTTON_10, AKEYCODE_BUTTON_11, AKEYCODE_BUTTON_12, 930 AKEYCODE_BUTTON_13, AKEYCODE_BUTTON_14, AKEYCODE_BUTTON_15, AKEYCODE_BUTTON_16, 931 }; 932 933 status_t EventHub::openDeviceLocked(const char *devicePath) { 934 char buffer[80]; 935 936 ALOGV("Opening device: %s", devicePath); 937 938 int fd = open(devicePath, O_RDWR | O_CLOEXEC); 939 if(fd < 0) { 940 ALOGE("could not open %s, %s\n", devicePath, strerror(errno)); 941 return -1; 942 } 943 944 InputDeviceIdentifier identifier; 945 946 // Get device name. 947 if(ioctl(fd, EVIOCGNAME(sizeof(buffer) - 1), &buffer) < 1) { 948 //fprintf(stderr, "could not get device name for %s, %s\n", devicePath, strerror(errno)); 949 } else { 950 buffer[sizeof(buffer) - 1] = '\0'; 951 identifier.name.setTo(buffer); 952 } 953 954 // Check to see if the device is on our excluded list 955 for (size_t i = 0; i < mExcludedDevices.size(); i++) { 956 const String8& item = mExcludedDevices.itemAt(i); 957 if (identifier.name == item) { 958 ALOGI("ignoring event id %s driver %s\n", devicePath, item.string()); 959 close(fd); 960 return -1; 961 } 962 } 963 964 // Get device driver version. 965 int driverVersion; 966 if(ioctl(fd, EVIOCGVERSION, &driverVersion)) { 967 ALOGE("could not get driver version for %s, %s\n", devicePath, strerror(errno)); 968 close(fd); 969 return -1; 970 } 971 972 // Get device identifier. 973 struct input_id inputId; 974 if(ioctl(fd, EVIOCGID, &inputId)) { 975 ALOGE("could not get device input id for %s, %s\n", devicePath, strerror(errno)); 976 close(fd); 977 return -1; 978 } 979 identifier.bus = inputId.bustype; 980 identifier.product = inputId.product; 981 identifier.vendor = inputId.vendor; 982 identifier.version = inputId.version; 983 984 // Get device physical location. 985 if(ioctl(fd, EVIOCGPHYS(sizeof(buffer) - 1), &buffer) < 1) { 986 //fprintf(stderr, "could not get location for %s, %s\n", devicePath, strerror(errno)); 987 } else { 988 buffer[sizeof(buffer) - 1] = '\0'; 989 identifier.location.setTo(buffer); 990 } 991 992 // Get device unique id. 993 if(ioctl(fd, EVIOCGUNIQ(sizeof(buffer) - 1), &buffer) < 1) { 994 //fprintf(stderr, "could not get idstring for %s, %s\n", devicePath, strerror(errno)); 995 } else { 996 buffer[sizeof(buffer) - 1] = '\0'; 997 identifier.uniqueId.setTo(buffer); 998 } 999 1000 // Fill in the descriptor. 1001 setDescriptor(identifier); 1002 1003 // Make file descriptor non-blocking for use with poll(). 1004 if (fcntl(fd, F_SETFL, O_NONBLOCK)) { 1005 ALOGE("Error %d making device file descriptor non-blocking.", errno); 1006 close(fd); 1007 return -1; 1008 } 1009 1010 // Allocate device. (The device object takes ownership of the fd at this point.) 1011 int32_t deviceId = mNextDeviceId++; 1012 Device* device = new Device(fd, deviceId, String8(devicePath), identifier); 1013 1014 ALOGV("add device %d: %s\n", deviceId, devicePath); 1015 ALOGV(" bus: %04x\n" 1016 " vendor %04x\n" 1017 " product %04x\n" 1018 " version %04x\n", 1019 identifier.bus, identifier.vendor, identifier.product, identifier.version); 1020 ALOGV(" name: \"%s\"\n", identifier.name.string()); 1021 ALOGV(" location: \"%s\"\n", identifier.location.string()); 1022 ALOGV(" unique id: \"%s\"\n", identifier.uniqueId.string()); 1023 ALOGV(" descriptor: \"%s\"\n", identifier.descriptor.string()); 1024 ALOGV(" driver: v%d.%d.%d\n", 1025 driverVersion >> 16, (driverVersion >> 8) & 0xff, driverVersion & 0xff); 1026 1027 // Load the configuration file for the device. 1028 loadConfigurationLocked(device); 1029 1030 // Figure out the kinds of events the device reports. 1031 ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(device->keyBitmask)), device->keyBitmask); 1032 ioctl(fd, EVIOCGBIT(EV_ABS, sizeof(device->absBitmask)), device->absBitmask); 1033 ioctl(fd, EVIOCGBIT(EV_REL, sizeof(device->relBitmask)), device->relBitmask); 1034 ioctl(fd, EVIOCGBIT(EV_SW, sizeof(device->swBitmask)), device->swBitmask); 1035 ioctl(fd, EVIOCGBIT(EV_LED, sizeof(device->ledBitmask)), device->ledBitmask); 1036 ioctl(fd, EVIOCGBIT(EV_FF, sizeof(device->ffBitmask)), device->ffBitmask); 1037 ioctl(fd, EVIOCGPROP(sizeof(device->propBitmask)), device->propBitmask); 1038 1039 // See if this is a keyboard. Ignore everything in the button range except for 1040 // joystick and gamepad buttons which are handled like keyboards for the most part. 1041 bool haveKeyboardKeys = containsNonZeroByte(device->keyBitmask, 0, sizeof_bit_array(BTN_MISC)) 1042 || containsNonZeroByte(device->keyBitmask, sizeof_bit_array(KEY_OK), 1043 sizeof_bit_array(KEY_MAX + 1)); 1044 bool haveGamepadButtons = containsNonZeroByte(device->keyBitmask, sizeof_bit_array(BTN_MISC), 1045 sizeof_bit_array(BTN_MOUSE)) 1046 || containsNonZeroByte(device->keyBitmask, sizeof_bit_array(BTN_JOYSTICK), 1047 sizeof_bit_array(BTN_DIGI)); 1048 if (haveKeyboardKeys || haveGamepadButtons) { 1049 device->classes |= INPUT_DEVICE_CLASS_KEYBOARD; 1050 } 1051 1052 // See if this is a cursor device such as a trackball or mouse. 1053 if (test_bit(BTN_MOUSE, device->keyBitmask) 1054 && test_bit(REL_X, device->relBitmask) 1055 && test_bit(REL_Y, device->relBitmask)) { 1056 device->classes |= INPUT_DEVICE_CLASS_CURSOR; 1057 } 1058 1059 // See if this is a touch pad. 1060 // Is this a new modern multi-touch driver? 1061 if (test_bit(ABS_MT_POSITION_X, device->absBitmask) 1062 && test_bit(ABS_MT_POSITION_Y, device->absBitmask)) { 1063 // Some joysticks such as the PS3 controller report axes that conflict 1064 // with the ABS_MT range. Try to confirm that the device really is 1065 // a touch screen. 1066 if (test_bit(BTN_TOUCH, device->keyBitmask) || !haveGamepadButtons) { 1067 device->classes |= INPUT_DEVICE_CLASS_TOUCH | INPUT_DEVICE_CLASS_TOUCH_MT; 1068 } 1069 // Is this an old style single-touch driver? 1070 } else if (test_bit(BTN_TOUCH, device->keyBitmask) 1071 && test_bit(ABS_X, device->absBitmask) 1072 && test_bit(ABS_Y, device->absBitmask)) { 1073 device->classes |= INPUT_DEVICE_CLASS_TOUCH; 1074 } 1075 1076 // See if this device is a joystick. 1077 // Assumes that joysticks always have gamepad buttons in order to distinguish them 1078 // from other devices such as accelerometers that also have absolute axes. 1079 if (haveGamepadButtons) { 1080 uint32_t assumedClasses = device->classes | INPUT_DEVICE_CLASS_JOYSTICK; 1081 for (int i = 0; i <= ABS_MAX; i++) { 1082 if (test_bit(i, device->absBitmask) 1083 && (getAbsAxisUsage(i, assumedClasses) & INPUT_DEVICE_CLASS_JOYSTICK)) { 1084 device->classes = assumedClasses; 1085 break; 1086 } 1087 } 1088 } 1089 1090 // Check whether this device has switches. 1091 for (int i = 0; i <= SW_MAX; i++) { 1092 if (test_bit(i, device->swBitmask)) { 1093 device->classes |= INPUT_DEVICE_CLASS_SWITCH; 1094 break; 1095 } 1096 } 1097 1098 // Check whether this device supports the vibrator. 1099 if (test_bit(FF_RUMBLE, device->ffBitmask)) { 1100 device->classes |= INPUT_DEVICE_CLASS_VIBRATOR; 1101 } 1102 1103 // Configure virtual keys. 1104 if ((device->classes & INPUT_DEVICE_CLASS_TOUCH)) { 1105 // Load the virtual keys for the touch screen, if any. 1106 // We do this now so that we can make sure to load the keymap if necessary. 1107 status_t status = loadVirtualKeyMapLocked(device); 1108 if (!status) { 1109 device->classes |= INPUT_DEVICE_CLASS_KEYBOARD; 1110 } 1111 } 1112 1113 // Load the key map. 1114 // We need to do this for joysticks too because the key layout may specify axes. 1115 status_t keyMapStatus = NAME_NOT_FOUND; 1116 if (device->classes & (INPUT_DEVICE_CLASS_KEYBOARD | INPUT_DEVICE_CLASS_JOYSTICK)) { 1117 // Load the keymap for the device. 1118 keyMapStatus = loadKeyMapLocked(device); 1119 } 1120 1121 // Configure the keyboard, gamepad or virtual keyboard. 1122 if (device->classes & INPUT_DEVICE_CLASS_KEYBOARD) { 1123 // Register the keyboard as a built-in keyboard if it is eligible. 1124 if (!keyMapStatus 1125 && mBuiltInKeyboardId == NO_BUILT_IN_KEYBOARD 1126 && isEligibleBuiltInKeyboard(device->identifier, 1127 device->configuration, &device->keyMap)) { 1128 mBuiltInKeyboardId = device->id; 1129 } 1130 1131 // 'Q' key support = cheap test of whether this is an alpha-capable kbd 1132 if (hasKeycodeLocked(device, AKEYCODE_Q)) { 1133 device->classes |= INPUT_DEVICE_CLASS_ALPHAKEY; 1134 } 1135 1136 // See if this device has a DPAD. 1137 if (hasKeycodeLocked(device, AKEYCODE_DPAD_UP) && 1138 hasKeycodeLocked(device, AKEYCODE_DPAD_DOWN) && 1139 hasKeycodeLocked(device, AKEYCODE_DPAD_LEFT) && 1140 hasKeycodeLocked(device, AKEYCODE_DPAD_RIGHT) && 1141 hasKeycodeLocked(device, AKEYCODE_DPAD_CENTER)) { 1142 device->classes |= INPUT_DEVICE_CLASS_DPAD; 1143 } 1144 1145 // See if this device has a gamepad. 1146 for (size_t i = 0; i < sizeof(GAMEPAD_KEYCODES)/sizeof(GAMEPAD_KEYCODES[0]); i++) { 1147 if (hasKeycodeLocked(device, GAMEPAD_KEYCODES[i])) { 1148 device->classes |= INPUT_DEVICE_CLASS_GAMEPAD; 1149 break; 1150 } 1151 } 1152 } 1153 1154 // If the device isn't recognized as something we handle, don't monitor it. 1155 if (device->classes == 0) { 1156 ALOGV("Dropping device: id=%d, path='%s', name='%s'", 1157 deviceId, devicePath, device->identifier.name.string()); 1158 delete device; 1159 return -1; 1160 } 1161 1162 // Determine whether the device is external or internal. 1163 if (isExternalDeviceLocked(device)) { 1164 device->classes |= INPUT_DEVICE_CLASS_EXTERNAL; 1165 } 1166 1167 // Register with epoll. 1168 struct epoll_event eventItem; 1169 memset(&eventItem, 0, sizeof(eventItem)); 1170 eventItem.events = EPOLLIN; 1171 eventItem.data.u32 = deviceId; 1172 if (epoll_ctl(mEpollFd, EPOLL_CTL_ADD, fd, &eventItem)) { 1173 ALOGE("Could not add device fd to epoll instance. errno=%d", errno); 1174 delete device; 1175 return -1; 1176 } 1177 1178 // Enable wake-lock behavior on kernels that support it. 1179 // TODO: Only need this for devices that can really wake the system. 1180 bool usingSuspendBlockIoctl = !ioctl(fd, EVIOCSSUSPENDBLOCK, 1); 1181 1182 // Tell the kernel that we want to use the monotonic clock for reporting timestamps 1183 // associated with input events. This is important because the input system 1184 // uses the timestamps extensively and assumes they were recorded using the monotonic 1185 // clock. 1186 // 1187 // In older kernel, before Linux 3.4, there was no way to tell the kernel which 1188 // clock to use to input event timestamps. The standard kernel behavior was to 1189 // record a real time timestamp, which isn't what we want. Android kernels therefore 1190 // contained a patch to the evdev_event() function in drivers/input/evdev.c to 1191 // replace the call to do_gettimeofday() with ktime_get_ts() to cause the monotonic 1192 // clock to be used instead of the real time clock. 1193 // 1194 // As of Linux 3.4, there is a new EVIOCSCLOCKID ioctl to set the desired clock. 1195 // Therefore, we no longer require the Android-specific kernel patch described above 1196 // as long as we make sure to set select the monotonic clock. We do that here. 1197 int clockId = CLOCK_MONOTONIC; 1198 bool usingClockIoctl = !ioctl(fd, EVIOCSCLOCKID, &clockId); 1199 1200 ALOGI("New device: id=%d, fd=%d, path='%s', name='%s', classes=0x%x, " 1201 "configuration='%s', keyLayout='%s', keyCharacterMap='%s', builtinKeyboard=%s, " 1202 "usingSuspendBlockIoctl=%s, usingClockIoctl=%s", 1203 deviceId, fd, devicePath, device->identifier.name.string(), 1204 device->classes, 1205 device->configurationFile.string(), 1206 device->keyMap.keyLayoutFile.string(), 1207 device->keyMap.keyCharacterMapFile.string(), 1208 toString(mBuiltInKeyboardId == deviceId), 1209 toString(usingSuspendBlockIoctl), toString(usingClockIoctl)); 1210 1211 addDeviceLocked(device); 1212 return 0; 1213 } 1214 1215 void EventHub::createVirtualKeyboardLocked() { 1216 InputDeviceIdentifier identifier; 1217 identifier.name = "Virtual"; 1218 identifier.uniqueId = "<virtual>"; 1219 setDescriptor(identifier); 1220 1221 Device* device = new Device(-1, VIRTUAL_KEYBOARD_ID, String8("<virtual>"), identifier); 1222 device->classes = INPUT_DEVICE_CLASS_KEYBOARD 1223 | INPUT_DEVICE_CLASS_ALPHAKEY 1224 | INPUT_DEVICE_CLASS_DPAD 1225 | INPUT_DEVICE_CLASS_VIRTUAL; 1226 loadKeyMapLocked(device); 1227 addDeviceLocked(device); 1228 } 1229 1230 void EventHub::addDeviceLocked(Device* device) { 1231 mDevices.add(device->id, device); 1232 device->next = mOpeningDevices; 1233 mOpeningDevices = device; 1234 } 1235 1236 void EventHub::loadConfigurationLocked(Device* device) { 1237 device->configurationFile = getInputDeviceConfigurationFilePathByDeviceIdentifier( 1238 device->identifier, INPUT_DEVICE_CONFIGURATION_FILE_TYPE_CONFIGURATION); 1239 if (device->configurationFile.isEmpty()) { 1240 ALOGD("No input device configuration file found for device '%s'.", 1241 device->identifier.name.string()); 1242 } else { 1243 status_t status = PropertyMap::load(device->configurationFile, 1244 &device->configuration); 1245 if (status) { 1246 ALOGE("Error loading input device configuration file for device '%s'. " 1247 "Using default configuration.", 1248 device->identifier.name.string()); 1249 } 1250 } 1251 } 1252 1253 status_t EventHub::loadVirtualKeyMapLocked(Device* device) { 1254 // The virtual key map is supplied by the kernel as a system board property file. 1255 String8 path; 1256 path.append("/sys/board_properties/virtualkeys."); 1257 path.append(device->identifier.name); 1258 if (access(path.string(), R_OK)) { 1259 return NAME_NOT_FOUND; 1260 } 1261 return VirtualKeyMap::load(path, &device->virtualKeyMap); 1262 } 1263 1264 status_t EventHub::loadKeyMapLocked(Device* device) { 1265 return device->keyMap.load(device->identifier, device->configuration); 1266 } 1267 1268 bool EventHub::isExternalDeviceLocked(Device* device) { 1269 if (device->configuration) { 1270 bool value; 1271 if (device->configuration->tryGetProperty(String8("device.internal"), value)) { 1272 return !value; 1273 } 1274 } 1275 return device->identifier.bus == BUS_USB || device->identifier.bus == BUS_BLUETOOTH; 1276 } 1277 1278 bool EventHub::hasKeycodeLocked(Device* device, int keycode) const { 1279 if (!device->keyMap.haveKeyLayout() || !device->keyBitmask) { 1280 return false; 1281 } 1282 1283 Vector<int32_t> scanCodes; 1284 device->keyMap.keyLayoutMap->findScanCodesForKey(keycode, &scanCodes); 1285 const size_t N = scanCodes.size(); 1286 for (size_t i=0; i<N && i<=KEY_MAX; i++) { 1287 int32_t sc = scanCodes.itemAt(i); 1288 if (sc >= 0 && sc <= KEY_MAX && test_bit(sc, device->keyBitmask)) { 1289 return true; 1290 } 1291 } 1292 1293 return false; 1294 } 1295 1296 status_t EventHub::closeDeviceByPathLocked(const char *devicePath) { 1297 Device* device = getDeviceByPathLocked(devicePath); 1298 if (device) { 1299 closeDeviceLocked(device); 1300 return 0; 1301 } 1302 ALOGV("Remove device: %s not found, device may already have been removed.", devicePath); 1303 return -1; 1304 } 1305 1306 void EventHub::closeAllDevicesLocked() { 1307 while (mDevices.size() > 0) { 1308 closeDeviceLocked(mDevices.valueAt(mDevices.size() - 1)); 1309 } 1310 } 1311 1312 void EventHub::closeDeviceLocked(Device* device) { 1313 ALOGI("Removed device: path=%s name=%s id=%d fd=%d classes=0x%x\n", 1314 device->path.string(), device->identifier.name.string(), device->id, 1315 device->fd, device->classes); 1316 1317 if (device->id == mBuiltInKeyboardId) { 1318 ALOGW("built-in keyboard device %s (id=%d) is closing! the apps will not like this", 1319 device->path.string(), mBuiltInKeyboardId); 1320 mBuiltInKeyboardId = NO_BUILT_IN_KEYBOARD; 1321 } 1322 1323 if (!device->isVirtual()) { 1324 if (epoll_ctl(mEpollFd, EPOLL_CTL_DEL, device->fd, NULL)) { 1325 ALOGW("Could not remove device fd from epoll instance. errno=%d", errno); 1326 } 1327 } 1328 1329 mDevices.removeItem(device->id); 1330 device->close(); 1331 1332 // Unlink for opening devices list if it is present. 1333 Device* pred = NULL; 1334 bool found = false; 1335 for (Device* entry = mOpeningDevices; entry != NULL; ) { 1336 if (entry == device) { 1337 found = true; 1338 break; 1339 } 1340 pred = entry; 1341 entry = entry->next; 1342 } 1343 if (found) { 1344 // Unlink the device from the opening devices list then delete it. 1345 // We don't need to tell the client that the device was closed because 1346 // it does not even know it was opened in the first place. 1347 ALOGI("Device %s was immediately closed after opening.", device->path.string()); 1348 if (pred) { 1349 pred->next = device->next; 1350 } else { 1351 mOpeningDevices = device->next; 1352 } 1353 delete device; 1354 } else { 1355 // Link into closing devices list. 1356 // The device will be deleted later after we have informed the client. 1357 device->next = mClosingDevices; 1358 mClosingDevices = device; 1359 } 1360 } 1361 1362 status_t EventHub::readNotifyLocked() { 1363 int res; 1364 char devname[PATH_MAX]; 1365 char *filename; 1366 char event_buf[512]; 1367 int event_size; 1368 int event_pos = 0; 1369 struct inotify_event *event; 1370 1371 ALOGV("EventHub::readNotify nfd: %d\n", mINotifyFd); 1372 res = read(mINotifyFd, event_buf, sizeof(event_buf)); 1373 if(res < (int)sizeof(*event)) { 1374 if(errno == EINTR) 1375 return 0; 1376 ALOGW("could not get event, %s\n", strerror(errno)); 1377 return -1; 1378 } 1379 //printf("got %d bytes of event information\n", res); 1380 1381 strcpy(devname, DEVICE_PATH); 1382 filename = devname + strlen(devname); 1383 *filename++ = '/'; 1384 1385 while(res >= (int)sizeof(*event)) { 1386 event = (struct inotify_event *)(event_buf + event_pos); 1387 //printf("%d: %08x \"%s\"\n", event->wd, event->mask, event->len ? event->name : ""); 1388 if(event->len) { 1389 strcpy(filename, event->name); 1390 if(event->mask & IN_CREATE) { 1391 openDeviceLocked(devname); 1392 } else { 1393 ALOGI("Removing device '%s' due to inotify event\n", devname); 1394 closeDeviceByPathLocked(devname); 1395 } 1396 } 1397 event_size = sizeof(*event) + event->len; 1398 res -= event_size; 1399 event_pos += event_size; 1400 } 1401 return 0; 1402 } 1403 1404 status_t EventHub::scanDirLocked(const char *dirname) 1405 { 1406 char devname[PATH_MAX]; 1407 char *filename; 1408 DIR *dir; 1409 struct dirent *de; 1410 dir = opendir(dirname); 1411 if(dir == NULL) 1412 return -1; 1413 strcpy(devname, dirname); 1414 filename = devname + strlen(devname); 1415 *filename++ = '/'; 1416 while((de = readdir(dir))) { 1417 if(de->d_name[0] == '.' && 1418 (de->d_name[1] == '\0' || 1419 (de->d_name[1] == '.' && de->d_name[2] == '\0'))) 1420 continue; 1421 strcpy(filename, de->d_name); 1422 openDeviceLocked(devname); 1423 } 1424 closedir(dir); 1425 return 0; 1426 } 1427 1428 void EventHub::requestReopenDevices() { 1429 ALOGV("requestReopenDevices() called"); 1430 1431 AutoMutex _l(mLock); 1432 mNeedToReopenDevices = true; 1433 } 1434 1435 void EventHub::dump(String8& dump) { 1436 dump.append("Event Hub State:\n"); 1437 1438 { // acquire lock 1439 AutoMutex _l(mLock); 1440 1441 dump.appendFormat(INDENT "BuiltInKeyboardId: %d\n", mBuiltInKeyboardId); 1442 1443 dump.append(INDENT "Devices:\n"); 1444 1445 for (size_t i = 0; i < mDevices.size(); i++) { 1446 const Device* device = mDevices.valueAt(i); 1447 if (mBuiltInKeyboardId == device->id) { 1448 dump.appendFormat(INDENT2 "%d: %s (aka device 0 - built-in keyboard)\n", 1449 device->id, device->identifier.name.string()); 1450 } else { 1451 dump.appendFormat(INDENT2 "%d: %s\n", device->id, 1452 device->identifier.name.string()); 1453 } 1454 dump.appendFormat(INDENT3 "Classes: 0x%08x\n", device->classes); 1455 dump.appendFormat(INDENT3 "Path: %s\n", device->path.string()); 1456 dump.appendFormat(INDENT3 "Descriptor: %s\n", device->identifier.descriptor.string()); 1457 dump.appendFormat(INDENT3 "Location: %s\n", device->identifier.location.string()); 1458 dump.appendFormat(INDENT3 "UniqueId: %s\n", device->identifier.uniqueId.string()); 1459 dump.appendFormat(INDENT3 "Identifier: bus=0x%04x, vendor=0x%04x, " 1460 "product=0x%04x, version=0x%04x\n", 1461 device->identifier.bus, device->identifier.vendor, 1462 device->identifier.product, device->identifier.version); 1463 dump.appendFormat(INDENT3 "KeyLayoutFile: %s\n", 1464 device->keyMap.keyLayoutFile.string()); 1465 dump.appendFormat(INDENT3 "KeyCharacterMapFile: %s\n", 1466 device->keyMap.keyCharacterMapFile.string()); 1467 dump.appendFormat(INDENT3 "ConfigurationFile: %s\n", 1468 device->configurationFile.string()); 1469 dump.appendFormat(INDENT3 "HaveKeyboardLayoutOverlay: %s\n", 1470 toString(device->overlayKeyMap != NULL)); 1471 } 1472 } // release lock 1473 } 1474 1475 void EventHub::monitor() { 1476 // Acquire and release the lock to ensure that the event hub has not deadlocked. 1477 mLock.lock(); 1478 mLock.unlock(); 1479 } 1480 1481 1482 }; // namespace android 1483
