EventHub.cpp revision e81056f35041de24adad9bc5384b9e8f72bf95f6
1/* 2 * Copyright (C) 2005 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#define LOG_TAG "EventHub" 18 19// #define LOG_NDEBUG 0 20 21#include "EventHub.h" 22 23#include <hardware_legacy/power.h> 24 25#include <cutils/properties.h> 26#include <utils/Log.h> 27#include <utils/Timers.h> 28#include <utils/threads.h> 29#include <utils/Errors.h> 30 31#include <stdlib.h> 32#include <stdio.h> 33#include <unistd.h> 34#include <fcntl.h> 35#include <memory.h> 36#include <errno.h> 37#include <assert.h> 38 39#include <ui/KeyLayoutMap.h> 40#include <ui/KeyCharacterMap.h> 41#include <ui/VirtualKeyMap.h> 42 43#include <string.h> 44#include <stdint.h> 45#include <dirent.h> 46 47#include <sys/inotify.h> 48#include <sys/epoll.h> 49#include <sys/ioctl.h> 50#include <sys/limits.h> 51 52/* this macro is used to tell if "bit" is set in "array" 53 * it selects a byte from the array, and does a boolean AND 54 * operation with a byte that only has the relevant bit set. 55 * eg. to check for the 12th bit, we do (array[1] & 1<<4) 56 */ 57#define test_bit(bit, array) (array[bit/8] & (1<<(bit%8))) 58 59/* this macro computes the number of bytes needed to represent a bit array of the specified size */ 60#define sizeof_bit_array(bits) ((bits + 7) / 8) 61 62#define INDENT " " 63#define INDENT2 " " 64#define INDENT3 " " 65 66namespace android { 67 68static const char *WAKE_LOCK_ID = "KeyEvents"; 69static const char *DEVICE_PATH = "/dev/input"; 70 71/* return the larger integer */ 72static inline int max(int v1, int v2) 73{ 74 return (v1 > v2) ? v1 : v2; 75} 76 77static inline const char* toString(bool value) { 78 return value ? "true" : "false"; 79} 80 81// --- EventHub::Device --- 82 83EventHub::Device::Device(int fd, int32_t id, const String8& path, 84 const InputDeviceIdentifier& identifier) : 85 next(NULL), 86 fd(fd), id(id), path(path), identifier(identifier), 87 classes(0), configuration(NULL), virtualKeyMap(NULL) { 88 memset(keyBitmask, 0, sizeof(keyBitmask)); 89 memset(absBitmask, 0, sizeof(absBitmask)); 90 memset(relBitmask, 0, sizeof(relBitmask)); 91 memset(swBitmask, 0, sizeof(swBitmask)); 92 memset(ledBitmask, 0, sizeof(ledBitmask)); 93 memset(propBitmask, 0, sizeof(propBitmask)); 94} 95 96EventHub::Device::~Device() { 97 close(); 98 delete configuration; 99 delete virtualKeyMap; 100} 101 102void EventHub::Device::close() { 103 if (fd >= 0) { 104 ::close(fd); 105 fd = -1; 106 } 107} 108 109 110// --- EventHub --- 111 112const uint32_t EventHub::EPOLL_ID_INOTIFY; 113const uint32_t EventHub::EPOLL_ID_WAKE; 114const int EventHub::EPOLL_SIZE_HINT; 115const int EventHub::EPOLL_MAX_EVENTS; 116 117EventHub::EventHub(void) : 118 mBuiltInKeyboardId(-1), mNextDeviceId(1), 119 mOpeningDevices(0), mClosingDevices(0), 120 mNeedToSendFinishedDeviceScan(false), 121 mNeedToReopenDevices(false), mNeedToScanDevices(true), 122 mPendingEventCount(0), mPendingEventIndex(0), mPendingINotify(false) { 123 acquire_wake_lock(PARTIAL_WAKE_LOCK, WAKE_LOCK_ID); 124 125 mNumCpus = sysconf(_SC_NPROCESSORS_ONLN); 126 127 mEpollFd = epoll_create(EPOLL_SIZE_HINT); 128 LOG_ALWAYS_FATAL_IF(mEpollFd < 0, "Could not create epoll instance. errno=%d", errno); 129 130 mINotifyFd = inotify_init(); 131 int result = inotify_add_watch(mINotifyFd, DEVICE_PATH, IN_DELETE | IN_CREATE); 132 LOG_ALWAYS_FATAL_IF(result < 0, "Could not register INotify for %s. errno=%d", 133 DEVICE_PATH, errno); 134 135 struct epoll_event eventItem; 136 memset(&eventItem, 0, sizeof(eventItem)); 137 eventItem.events = EPOLLIN; 138 eventItem.data.u32 = EPOLL_ID_INOTIFY; 139 result = epoll_ctl(mEpollFd, EPOLL_CTL_ADD, mINotifyFd, &eventItem); 140 LOG_ALWAYS_FATAL_IF(result != 0, "Could not add INotify to epoll instance. errno=%d", errno); 141 142 int wakeFds[2]; 143 result = pipe(wakeFds); 144 LOG_ALWAYS_FATAL_IF(result != 0, "Could not create wake pipe. errno=%d", errno); 145 146 mWakeReadPipeFd = wakeFds[0]; 147 mWakeWritePipeFd = wakeFds[1]; 148 149 result = fcntl(mWakeReadPipeFd, F_SETFL, O_NONBLOCK); 150 LOG_ALWAYS_FATAL_IF(result != 0, "Could not make wake read pipe non-blocking. errno=%d", 151 errno); 152 153 result = fcntl(mWakeWritePipeFd, F_SETFL, O_NONBLOCK); 154 LOG_ALWAYS_FATAL_IF(result != 0, "Could not make wake write pipe non-blocking. errno=%d", 155 errno); 156 157 eventItem.data.u32 = EPOLL_ID_WAKE; 158 result = epoll_ctl(mEpollFd, EPOLL_CTL_ADD, mWakeReadPipeFd, &eventItem); 159 LOG_ALWAYS_FATAL_IF(result != 0, "Could not add wake read pipe to epoll instance. errno=%d", 160 errno); 161} 162 163EventHub::~EventHub(void) { 164 closeAllDevicesLocked(); 165 166 while (mClosingDevices) { 167 Device* device = mClosingDevices; 168 mClosingDevices = device->next; 169 delete device; 170 } 171 172 ::close(mEpollFd); 173 ::close(mINotifyFd); 174 ::close(mWakeReadPipeFd); 175 ::close(mWakeWritePipeFd); 176 177 release_wake_lock(WAKE_LOCK_ID); 178} 179 180String8 EventHub::getDeviceName(int32_t deviceId) const { 181 AutoMutex _l(mLock); 182 Device* device = getDeviceLocked(deviceId); 183 if (device == NULL) return String8(); 184 return device->identifier.name; 185} 186 187uint32_t EventHub::getDeviceClasses(int32_t deviceId) const { 188 AutoMutex _l(mLock); 189 Device* device = getDeviceLocked(deviceId); 190 if (device == NULL) return 0; 191 return device->classes; 192} 193 194void EventHub::getConfiguration(int32_t deviceId, PropertyMap* outConfiguration) const { 195 AutoMutex _l(mLock); 196 Device* device = getDeviceLocked(deviceId); 197 if (device && device->configuration) { 198 *outConfiguration = *device->configuration; 199 } else { 200 outConfiguration->clear(); 201 } 202} 203 204status_t EventHub::getAbsoluteAxisInfo(int32_t deviceId, int axis, 205 RawAbsoluteAxisInfo* outAxisInfo) const { 206 outAxisInfo->clear(); 207 208 if (axis >= 0 && axis <= ABS_MAX) { 209 AutoMutex _l(mLock); 210 211 Device* device = getDeviceLocked(deviceId); 212 if (device && test_bit(axis, device->absBitmask)) { 213 struct input_absinfo info; 214 if(ioctl(device->fd, EVIOCGABS(axis), &info)) { 215 LOGW("Error reading absolute controller %d for device %s fd %d, errno=%d", 216 axis, device->identifier.name.string(), device->fd, errno); 217 return -errno; 218 } 219 220 if (info.minimum != info.maximum) { 221 outAxisInfo->valid = true; 222 outAxisInfo->minValue = info.minimum; 223 outAxisInfo->maxValue = info.maximum; 224 outAxisInfo->flat = info.flat; 225 outAxisInfo->fuzz = info.fuzz; 226 outAxisInfo->resolution = info.resolution; 227 } 228 return OK; 229 } 230 } 231 return -1; 232} 233 234bool EventHub::hasRelativeAxis(int32_t deviceId, int axis) const { 235 if (axis >= 0 && axis <= REL_MAX) { 236 AutoMutex _l(mLock); 237 238 Device* device = getDeviceLocked(deviceId); 239 if (device) { 240 return test_bit(axis, device->relBitmask); 241 } 242 } 243 return false; 244} 245 246bool EventHub::hasInputProperty(int32_t deviceId, int property) const { 247 if (property >= 0 && property <= INPUT_PROP_MAX) { 248 AutoMutex _l(mLock); 249 250 Device* device = getDeviceLocked(deviceId); 251 if (device) { 252 return test_bit(property, device->propBitmask); 253 } 254 } 255 return false; 256} 257 258int32_t EventHub::getScanCodeState(int32_t deviceId, int32_t scanCode) const { 259 if (scanCode >= 0 && scanCode <= KEY_MAX) { 260 AutoMutex _l(mLock); 261 262 Device* device = getDeviceLocked(deviceId); 263 if (device && test_bit(scanCode, device->keyBitmask)) { 264 uint8_t keyState[sizeof_bit_array(KEY_MAX + 1)]; 265 memset(keyState, 0, sizeof(keyState)); 266 if (ioctl(device->fd, EVIOCGKEY(sizeof(keyState)), keyState) >= 0) { 267 return test_bit(scanCode, keyState) ? AKEY_STATE_DOWN : AKEY_STATE_UP; 268 } 269 } 270 } 271 return AKEY_STATE_UNKNOWN; 272} 273 274int32_t EventHub::getKeyCodeState(int32_t deviceId, int32_t keyCode) const { 275 AutoMutex _l(mLock); 276 277 Device* device = getDeviceLocked(deviceId); 278 if (device && device->keyMap.haveKeyLayout()) { 279 Vector<int32_t> scanCodes; 280 device->keyMap.keyLayoutMap->findScanCodesForKey(keyCode, &scanCodes); 281 if (scanCodes.size() != 0) { 282 uint8_t keyState[sizeof_bit_array(KEY_MAX + 1)]; 283 memset(keyState, 0, sizeof(keyState)); 284 if (ioctl(device->fd, EVIOCGKEY(sizeof(keyState)), keyState) >= 0) { 285 for (size_t i = 0; i < scanCodes.size(); i++) { 286 int32_t sc = scanCodes.itemAt(i); 287 if (sc >= 0 && sc <= KEY_MAX && test_bit(sc, keyState)) { 288 return AKEY_STATE_DOWN; 289 } 290 } 291 return AKEY_STATE_UP; 292 } 293 } 294 } 295 return AKEY_STATE_UNKNOWN; 296} 297 298int32_t EventHub::getSwitchState(int32_t deviceId, int32_t sw) const { 299 if (sw >= 0 && sw <= SW_MAX) { 300 AutoMutex _l(mLock); 301 302 Device* device = getDeviceLocked(deviceId); 303 if (device && test_bit(sw, device->swBitmask)) { 304 uint8_t swState[sizeof_bit_array(SW_MAX + 1)]; 305 memset(swState, 0, sizeof(swState)); 306 if (ioctl(device->fd, EVIOCGSW(sizeof(swState)), swState) >= 0) { 307 return test_bit(sw, swState) ? AKEY_STATE_DOWN : AKEY_STATE_UP; 308 } 309 } 310 } 311 return AKEY_STATE_UNKNOWN; 312} 313 314status_t EventHub::getAbsoluteAxisValue(int32_t deviceId, int32_t axis, int32_t* outValue) const { 315 *outValue = 0; 316 317 if (axis >= 0 && axis <= ABS_MAX) { 318 AutoMutex _l(mLock); 319 320 Device* device = getDeviceLocked(deviceId); 321 if (device && test_bit(axis, device->absBitmask)) { 322 struct input_absinfo info; 323 if(ioctl(device->fd, EVIOCGABS(axis), &info)) { 324 LOGW("Error reading absolute controller %d for device %s fd %d, errno=%d", 325 axis, device->identifier.name.string(), device->fd, errno); 326 return -errno; 327 } 328 329 *outValue = info.value; 330 return OK; 331 } 332 } 333 return -1; 334} 335 336bool EventHub::markSupportedKeyCodes(int32_t deviceId, size_t numCodes, 337 const int32_t* keyCodes, uint8_t* outFlags) const { 338 AutoMutex _l(mLock); 339 340 Device* device = getDeviceLocked(deviceId); 341 if (device && device->keyMap.haveKeyLayout()) { 342 Vector<int32_t> scanCodes; 343 for (size_t codeIndex = 0; codeIndex < numCodes; codeIndex++) { 344 scanCodes.clear(); 345 346 status_t err = device->keyMap.keyLayoutMap->findScanCodesForKey( 347 keyCodes[codeIndex], &scanCodes); 348 if (! err) { 349 // check the possible scan codes identified by the layout map against the 350 // map of codes actually emitted by the driver 351 for (size_t sc = 0; sc < scanCodes.size(); sc++) { 352 if (test_bit(scanCodes[sc], device->keyBitmask)) { 353 outFlags[codeIndex] = 1; 354 break; 355 } 356 } 357 } 358 } 359 return true; 360 } 361 return false; 362} 363 364status_t EventHub::mapKey(int32_t deviceId, int scancode, 365 int32_t* outKeycode, uint32_t* outFlags) const 366{ 367 AutoMutex _l(mLock); 368 Device* device = getDeviceLocked(deviceId); 369 370 if (device && device->keyMap.haveKeyLayout()) { 371 status_t err = device->keyMap.keyLayoutMap->mapKey(scancode, outKeycode, outFlags); 372 if (err == NO_ERROR) { 373 return NO_ERROR; 374 } 375 } 376 377 if (mBuiltInKeyboardId != -1) { 378 device = getDeviceLocked(mBuiltInKeyboardId); 379 380 if (device && device->keyMap.haveKeyLayout()) { 381 status_t err = device->keyMap.keyLayoutMap->mapKey(scancode, outKeycode, outFlags); 382 if (err == NO_ERROR) { 383 return NO_ERROR; 384 } 385 } 386 } 387 388 *outKeycode = 0; 389 *outFlags = 0; 390 return NAME_NOT_FOUND; 391} 392 393status_t EventHub::mapAxis(int32_t deviceId, int scancode, AxisInfo* outAxisInfo) const 394{ 395 AutoMutex _l(mLock); 396 Device* device = getDeviceLocked(deviceId); 397 398 if (device && device->keyMap.haveKeyLayout()) { 399 status_t err = device->keyMap.keyLayoutMap->mapAxis(scancode, outAxisInfo); 400 if (err == NO_ERROR) { 401 return NO_ERROR; 402 } 403 } 404 405 if (mBuiltInKeyboardId != -1) { 406 device = getDeviceLocked(mBuiltInKeyboardId); 407 408 if (device && device->keyMap.haveKeyLayout()) { 409 status_t err = device->keyMap.keyLayoutMap->mapAxis(scancode, outAxisInfo); 410 if (err == NO_ERROR) { 411 return NO_ERROR; 412 } 413 } 414 } 415 416 return NAME_NOT_FOUND; 417} 418 419void EventHub::setExcludedDevices(const Vector<String8>& devices) { 420 AutoMutex _l(mLock); 421 422 mExcludedDevices = devices; 423} 424 425bool EventHub::hasScanCode(int32_t deviceId, int32_t scanCode) const { 426 AutoMutex _l(mLock); 427 Device* device = getDeviceLocked(deviceId); 428 if (device && scanCode >= 0 && scanCode <= KEY_MAX) { 429 if (test_bit(scanCode, device->keyBitmask)) { 430 return true; 431 } 432 } 433 return false; 434} 435 436bool EventHub::hasLed(int32_t deviceId, int32_t led) const { 437 AutoMutex _l(mLock); 438 Device* device = getDeviceLocked(deviceId); 439 if (device && led >= 0 && led <= LED_MAX) { 440 if (test_bit(led, device->ledBitmask)) { 441 return true; 442 } 443 } 444 return false; 445} 446 447void EventHub::setLedState(int32_t deviceId, int32_t led, bool on) { 448 AutoMutex _l(mLock); 449 Device* device = getDeviceLocked(deviceId); 450 if (device && led >= 0 && led <= LED_MAX) { 451 struct input_event ev; 452 ev.time.tv_sec = 0; 453 ev.time.tv_usec = 0; 454 ev.type = EV_LED; 455 ev.code = led; 456 ev.value = on ? 1 : 0; 457 458 ssize_t nWrite; 459 do { 460 nWrite = write(device->fd, &ev, sizeof(struct input_event)); 461 } while (nWrite == -1 && errno == EINTR); 462 } 463} 464 465void EventHub::getVirtualKeyDefinitions(int32_t deviceId, 466 Vector<VirtualKeyDefinition>& outVirtualKeys) const { 467 outVirtualKeys.clear(); 468 469 AutoMutex _l(mLock); 470 Device* device = getDeviceLocked(deviceId); 471 if (device && device->virtualKeyMap) { 472 outVirtualKeys.appendVector(device->virtualKeyMap->getVirtualKeys()); 473 } 474} 475 476EventHub::Device* EventHub::getDeviceLocked(int32_t deviceId) const { 477 if (deviceId == 0) { 478 deviceId = mBuiltInKeyboardId; 479 } 480 ssize_t index = mDevices.indexOfKey(deviceId); 481 return index >= 0 ? mDevices.valueAt(index) : NULL; 482} 483 484EventHub::Device* EventHub::getDeviceByPathLocked(const char* devicePath) const { 485 for (size_t i = 0; i < mDevices.size(); i++) { 486 Device* device = mDevices.valueAt(i); 487 if (device->path == devicePath) { 488 return device; 489 } 490 } 491 return NULL; 492} 493 494size_t EventHub::getEvents(int timeoutMillis, RawEvent* buffer, size_t bufferSize) { 495 LOG_ASSERT(bufferSize >= 1); 496 497 AutoMutex _l(mLock); 498 499 struct input_event readBuffer[bufferSize]; 500 501 RawEvent* event = buffer; 502 size_t capacity = bufferSize; 503 bool awoken = false; 504 for (;;) { 505 nsecs_t now = systemTime(SYSTEM_TIME_MONOTONIC); 506 507 // Reopen input devices if needed. 508 if (mNeedToReopenDevices) { 509 mNeedToReopenDevices = false; 510 511 LOGI("Reopening all input devices due to a configuration change."); 512 513 closeAllDevicesLocked(); 514 mNeedToScanDevices = true; 515 break; // return to the caller before we actually rescan 516 } 517 518 // Report any devices that had last been added/removed. 519 while (mClosingDevices) { 520 Device* device = mClosingDevices; 521 LOGV("Reporting device closed: id=%d, name=%s\n", 522 device->id, device->path.string()); 523 mClosingDevices = device->next; 524 event->when = now; 525 event->deviceId = device->id == mBuiltInKeyboardId ? 0 : device->id; 526 event->type = DEVICE_REMOVED; 527 event += 1; 528 delete device; 529 mNeedToSendFinishedDeviceScan = true; 530 if (--capacity == 0) { 531 break; 532 } 533 } 534 535 if (mNeedToScanDevices) { 536 mNeedToScanDevices = false; 537 scanDevicesLocked(); 538 mNeedToSendFinishedDeviceScan = true; 539 } 540 541 while (mOpeningDevices != NULL) { 542 Device* device = mOpeningDevices; 543 LOGV("Reporting device opened: id=%d, name=%s\n", 544 device->id, device->path.string()); 545 mOpeningDevices = device->next; 546 event->when = now; 547 event->deviceId = device->id == mBuiltInKeyboardId ? 0 : device->id; 548 event->type = DEVICE_ADDED; 549 event += 1; 550 mNeedToSendFinishedDeviceScan = true; 551 if (--capacity == 0) { 552 break; 553 } 554 } 555 556 if (mNeedToSendFinishedDeviceScan) { 557 mNeedToSendFinishedDeviceScan = false; 558 event->when = now; 559 event->type = FINISHED_DEVICE_SCAN; 560 event += 1; 561 if (--capacity == 0) { 562 break; 563 } 564 } 565 566 // Grab the next input event. 567 bool deviceChanged = false; 568 while (mPendingEventIndex < mPendingEventCount) { 569 const struct epoll_event& eventItem = mPendingEventItems[mPendingEventIndex++]; 570 if (eventItem.data.u32 == EPOLL_ID_INOTIFY) { 571 if (eventItem.events & EPOLLIN) { 572 mPendingINotify = true; 573 } else { 574 LOGW("Received unexpected epoll event 0x%08x for INotify.", eventItem.events); 575 } 576 continue; 577 } 578 579 if (eventItem.data.u32 == EPOLL_ID_WAKE) { 580 if (eventItem.events & EPOLLIN) { 581 LOGV("awoken after wake()"); 582 awoken = true; 583 char buffer[16]; 584 ssize_t nRead; 585 do { 586 nRead = read(mWakeReadPipeFd, buffer, sizeof(buffer)); 587 } while ((nRead == -1 && errno == EINTR) || nRead == sizeof(buffer)); 588 } else { 589 LOGW("Received unexpected epoll event 0x%08x for wake read pipe.", 590 eventItem.events); 591 } 592 continue; 593 } 594 595 ssize_t deviceIndex = mDevices.indexOfKey(eventItem.data.u32); 596 if (deviceIndex < 0) { 597 LOGW("Received unexpected epoll event 0x%08x for unknown device id %d.", 598 eventItem.events, eventItem.data.u32); 599 continue; 600 } 601 602 Device* device = mDevices.valueAt(deviceIndex); 603 if (eventItem.events & EPOLLIN) { 604 int32_t readSize = read(device->fd, readBuffer, 605 sizeof(struct input_event) * capacity); 606 if (readSize == 0 || (readSize < 0 && errno == ENODEV)) { 607 // Device was removed before INotify noticed. 608 deviceChanged = true; 609 closeDeviceLocked(device); 610 } else if (readSize < 0) { 611 if (errno != EAGAIN && errno != EINTR) { 612 LOGW("could not get event (errno=%d)", errno); 613 } 614 } else if ((readSize % sizeof(struct input_event)) != 0) { 615 LOGE("could not get event (wrong size: %d)", readSize); 616 } else { 617 int32_t deviceId = device->id == mBuiltInKeyboardId ? 0 : device->id; 618 619 size_t count = size_t(readSize) / sizeof(struct input_event); 620 for (size_t i = 0; i < count; i++) { 621 const struct input_event& iev = readBuffer[i]; 622 LOGV("%s got: t0=%d, t1=%d, type=%d, code=%d, value=%d", 623 device->path.string(), 624 (int) iev.time.tv_sec, (int) iev.time.tv_usec, 625 iev.type, iev.code, iev.value); 626 627#ifdef HAVE_POSIX_CLOCKS 628 // Use the time specified in the event instead of the current time 629 // so that downstream code can get more accurate estimates of 630 // event dispatch latency from the time the event is enqueued onto 631 // the evdev client buffer. 632 // 633 // The event's timestamp fortuitously uses the same monotonic clock 634 // time base as the rest of Android. The kernel event device driver 635 // (drivers/input/evdev.c) obtains timestamps using ktime_get_ts(). 636 // The systemTime(SYSTEM_TIME_MONOTONIC) function we use everywhere 637 // calls clock_gettime(CLOCK_MONOTONIC) which is implemented as a 638 // system call that also queries ktime_get_ts(). 639 event->when = nsecs_t(iev.time.tv_sec) * 1000000000LL 640 + nsecs_t(iev.time.tv_usec) * 1000LL; 641 LOGV("event time %lld, now %lld", event->when, now); 642#else 643 event->when = now; 644#endif 645 event->deviceId = deviceId; 646 event->type = iev.type; 647 event->scanCode = iev.code; 648 event->value = iev.value; 649 event->keyCode = AKEYCODE_UNKNOWN; 650 event->flags = 0; 651 if (iev.type == EV_KEY && device->keyMap.haveKeyLayout()) { 652 status_t err = device->keyMap.keyLayoutMap->mapKey(iev.code, 653 &event->keyCode, &event->flags); 654 LOGV("iev.code=%d keyCode=%d flags=0x%08x err=%d\n", 655 iev.code, event->keyCode, event->flags, err); 656 } 657 event += 1; 658 } 659 capacity -= count; 660 if (capacity == 0) { 661 // The result buffer is full. Reset the pending event index 662 // so we will try to read the device again on the next iteration. 663 mPendingEventIndex -= 1; 664 break; 665 } 666 } 667 } else { 668 LOGW("Received unexpected epoll event 0x%08x for device %s.", 669 eventItem.events, device->identifier.name.string()); 670 } 671 } 672 673 // readNotify() will modify the list of devices so this must be done after 674 // processing all other events to ensure that we read all remaining events 675 // before closing the devices. 676 if (mPendingINotify && mPendingEventIndex >= mPendingEventCount) { 677 mPendingINotify = false; 678 readNotifyLocked(); 679 deviceChanged = true; 680 } 681 682 // Report added or removed devices immediately. 683 if (deviceChanged) { 684 continue; 685 } 686 687 // Return now if we have collected any events or if we were explicitly awoken. 688 if (event != buffer || awoken) { 689 break; 690 } 691 692 // Poll for events. Mind the wake lock dance! 693 // We hold a wake lock at all times except during epoll_wait(). This works due to some 694 // subtle choreography. When a device driver has pending (unread) events, it acquires 695 // a kernel wake lock. However, once the last pending event has been read, the device 696 // driver will release the kernel wake lock. To prevent the system from going to sleep 697 // when this happens, the EventHub holds onto its own user wake lock while the client 698 // is processing events. Thus the system can only sleep if there are no events 699 // pending or currently being processed. 700 // 701 // The timeout is advisory only. If the device is asleep, it will not wake just to 702 // service the timeout. 703 mPendingEventIndex = 0; 704 705 mLock.unlock(); // release lock before poll, must be before release_wake_lock 706 release_wake_lock(WAKE_LOCK_ID); 707 708 int pollResult = epoll_wait(mEpollFd, mPendingEventItems, EPOLL_MAX_EVENTS, timeoutMillis); 709 710 acquire_wake_lock(PARTIAL_WAKE_LOCK, WAKE_LOCK_ID); 711 mLock.lock(); // reacquire lock after poll, must be after acquire_wake_lock 712 713 if (pollResult == 0) { 714 // Timed out. 715 mPendingEventCount = 0; 716 break; 717 } 718 719 if (pollResult < 0) { 720 // An error occurred. 721 mPendingEventCount = 0; 722 723 // Sleep after errors to avoid locking up the system. 724 // Hopefully the error is transient. 725 if (errno != EINTR) { 726 LOGW("poll failed (errno=%d)\n", errno); 727 usleep(100000); 728 } 729 } else { 730 // Some events occurred. 731 mPendingEventCount = size_t(pollResult); 732 733 // On an SMP system, it is possible for the framework to read input events 734 // faster than the kernel input device driver can produce a complete packet. 735 // Because poll() wakes up as soon as the first input event becomes available, 736 // the framework will often end up reading one event at a time until the 737 // packet is complete. Instead of one call to read() returning 71 events, 738 // it could take 71 calls to read() each returning 1 event. 739 // 740 // Sleep for a short period of time after waking up from the poll() to give 741 // the kernel time to finish writing the entire packet of input events. 742 if (mNumCpus > 1) { 743 usleep(250); 744 } 745 } 746 } 747 748 // All done, return the number of events we read. 749 return event - buffer; 750} 751 752void EventHub::wake() { 753 LOGV("wake() called"); 754 755 ssize_t nWrite; 756 do { 757 nWrite = write(mWakeWritePipeFd, "W", 1); 758 } while (nWrite == -1 && errno == EINTR); 759 760 if (nWrite != 1 && errno != EAGAIN) { 761 LOGW("Could not write wake signal, errno=%d", errno); 762 } 763} 764 765void EventHub::scanDevicesLocked() { 766 status_t res = scanDirLocked(DEVICE_PATH); 767 if(res < 0) { 768 LOGE("scan dir failed for %s\n", DEVICE_PATH); 769 } 770} 771 772// ---------------------------------------------------------------------------- 773 774static bool containsNonZeroByte(const uint8_t* array, uint32_t startIndex, uint32_t endIndex) { 775 const uint8_t* end = array + endIndex; 776 array += startIndex; 777 while (array != end) { 778 if (*(array++) != 0) { 779 return true; 780 } 781 } 782 return false; 783} 784 785static const int32_t GAMEPAD_KEYCODES[] = { 786 AKEYCODE_BUTTON_A, AKEYCODE_BUTTON_B, AKEYCODE_BUTTON_C, 787 AKEYCODE_BUTTON_X, AKEYCODE_BUTTON_Y, AKEYCODE_BUTTON_Z, 788 AKEYCODE_BUTTON_L1, AKEYCODE_BUTTON_R1, 789 AKEYCODE_BUTTON_L2, AKEYCODE_BUTTON_R2, 790 AKEYCODE_BUTTON_THUMBL, AKEYCODE_BUTTON_THUMBR, 791 AKEYCODE_BUTTON_START, AKEYCODE_BUTTON_SELECT, AKEYCODE_BUTTON_MODE, 792 AKEYCODE_BUTTON_1, AKEYCODE_BUTTON_2, AKEYCODE_BUTTON_3, AKEYCODE_BUTTON_4, 793 AKEYCODE_BUTTON_5, AKEYCODE_BUTTON_6, AKEYCODE_BUTTON_7, AKEYCODE_BUTTON_8, 794 AKEYCODE_BUTTON_9, AKEYCODE_BUTTON_10, AKEYCODE_BUTTON_11, AKEYCODE_BUTTON_12, 795 AKEYCODE_BUTTON_13, AKEYCODE_BUTTON_14, AKEYCODE_BUTTON_15, AKEYCODE_BUTTON_16, 796}; 797 798status_t EventHub::openDeviceLocked(const char *devicePath) { 799 char buffer[80]; 800 801 LOGV("Opening device: %s", devicePath); 802 803 int fd = open(devicePath, O_RDWR); 804 if(fd < 0) { 805 LOGE("could not open %s, %s\n", devicePath, strerror(errno)); 806 return -1; 807 } 808 809 InputDeviceIdentifier identifier; 810 811 // Get device name. 812 if(ioctl(fd, EVIOCGNAME(sizeof(buffer) - 1), &buffer) < 1) { 813 //fprintf(stderr, "could not get device name for %s, %s\n", devicePath, strerror(errno)); 814 } else { 815 buffer[sizeof(buffer) - 1] = '\0'; 816 identifier.name.setTo(buffer); 817 } 818 819 // Check to see if the device is on our excluded list 820 for (size_t i = 0; i < mExcludedDevices.size(); i++) { 821 const String8& item = mExcludedDevices.itemAt(i); 822 if (identifier.name == item) { 823 LOGI("ignoring event id %s driver %s\n", devicePath, item.string()); 824 close(fd); 825 return -1; 826 } 827 } 828 829 // Get device driver version. 830 int driverVersion; 831 if(ioctl(fd, EVIOCGVERSION, &driverVersion)) { 832 LOGE("could not get driver version for %s, %s\n", devicePath, strerror(errno)); 833 close(fd); 834 return -1; 835 } 836 837 // Get device identifier. 838 struct input_id inputId; 839 if(ioctl(fd, EVIOCGID, &inputId)) { 840 LOGE("could not get device input id for %s, %s\n", devicePath, strerror(errno)); 841 close(fd); 842 return -1; 843 } 844 identifier.bus = inputId.bustype; 845 identifier.product = inputId.product; 846 identifier.vendor = inputId.vendor; 847 identifier.version = inputId.version; 848 849 // Get device physical location. 850 if(ioctl(fd, EVIOCGPHYS(sizeof(buffer) - 1), &buffer) < 1) { 851 //fprintf(stderr, "could not get location for %s, %s\n", devicePath, strerror(errno)); 852 } else { 853 buffer[sizeof(buffer) - 1] = '\0'; 854 identifier.location.setTo(buffer); 855 } 856 857 // Get device unique id. 858 if(ioctl(fd, EVIOCGUNIQ(sizeof(buffer) - 1), &buffer) < 1) { 859 //fprintf(stderr, "could not get idstring for %s, %s\n", devicePath, strerror(errno)); 860 } else { 861 buffer[sizeof(buffer) - 1] = '\0'; 862 identifier.uniqueId.setTo(buffer); 863 } 864 865 // Make file descriptor non-blocking for use with poll(). 866 if (fcntl(fd, F_SETFL, O_NONBLOCK)) { 867 LOGE("Error %d making device file descriptor non-blocking.", errno); 868 close(fd); 869 return -1; 870 } 871 872 // Allocate device. (The device object takes ownership of the fd at this point.) 873 int32_t deviceId = mNextDeviceId++; 874 Device* device = new Device(fd, deviceId, String8(devicePath), identifier); 875 876#if 0 877 LOGI("add device %d: %s\n", deviceId, devicePath); 878 LOGI(" bus: %04x\n" 879 " vendor %04x\n" 880 " product %04x\n" 881 " version %04x\n", 882 identifier.bus, identifier.vendor, identifier.product, identifier.version); 883 LOGI(" name: \"%s\"\n", identifier.name.string()); 884 LOGI(" location: \"%s\"\n", identifier.location.string()); 885 LOGI(" unique id: \"%s\"\n", identifier.uniqueId.string()); 886 LOGI(" driver: v%d.%d.%d\n", 887 driverVersion >> 16, (driverVersion >> 8) & 0xff, driverVersion & 0xff); 888#endif 889 890 // Load the configuration file for the device. 891 loadConfigurationLocked(device); 892 893 // Figure out the kinds of events the device reports. 894 ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(device->keyBitmask)), device->keyBitmask); 895 ioctl(fd, EVIOCGBIT(EV_ABS, sizeof(device->absBitmask)), device->absBitmask); 896 ioctl(fd, EVIOCGBIT(EV_REL, sizeof(device->relBitmask)), device->relBitmask); 897 ioctl(fd, EVIOCGBIT(EV_SW, sizeof(device->swBitmask)), device->swBitmask); 898 ioctl(fd, EVIOCGBIT(EV_LED, sizeof(device->ledBitmask)), device->ledBitmask); 899 ioctl(fd, EVIOCGPROP(sizeof(device->propBitmask)), device->propBitmask); 900 901 // See if this is a keyboard. Ignore everything in the button range except for 902 // joystick and gamepad buttons which are handled like keyboards for the most part. 903 bool haveKeyboardKeys = containsNonZeroByte(device->keyBitmask, 0, sizeof_bit_array(BTN_MISC)) 904 || containsNonZeroByte(device->keyBitmask, sizeof_bit_array(KEY_OK), 905 sizeof_bit_array(KEY_MAX + 1)); 906 bool haveGamepadButtons = containsNonZeroByte(device->keyBitmask, sizeof_bit_array(BTN_MISC), 907 sizeof_bit_array(BTN_MOUSE)) 908 || containsNonZeroByte(device->keyBitmask, sizeof_bit_array(BTN_JOYSTICK), 909 sizeof_bit_array(BTN_DIGI)); 910 if (haveKeyboardKeys || haveGamepadButtons) { 911 device->classes |= INPUT_DEVICE_CLASS_KEYBOARD; 912 } 913 914 // See if this is a cursor device such as a trackball or mouse. 915 if (test_bit(BTN_MOUSE, device->keyBitmask) 916 && test_bit(REL_X, device->relBitmask) 917 && test_bit(REL_Y, device->relBitmask)) { 918 device->classes |= INPUT_DEVICE_CLASS_CURSOR; 919 } 920 921 // See if this is a touch pad. 922 // Is this a new modern multi-touch driver? 923 if (test_bit(ABS_MT_POSITION_X, device->absBitmask) 924 && test_bit(ABS_MT_POSITION_Y, device->absBitmask)) { 925 // Some joysticks such as the PS3 controller report axes that conflict 926 // with the ABS_MT range. Try to confirm that the device really is 927 // a touch screen. 928 if (test_bit(BTN_TOUCH, device->keyBitmask) || !haveGamepadButtons) { 929 device->classes |= INPUT_DEVICE_CLASS_TOUCH | INPUT_DEVICE_CLASS_TOUCH_MT; 930 } 931 // Is this an old style single-touch driver? 932 } else if (test_bit(BTN_TOUCH, device->keyBitmask) 933 && test_bit(ABS_X, device->absBitmask) 934 && test_bit(ABS_Y, device->absBitmask)) { 935 device->classes |= INPUT_DEVICE_CLASS_TOUCH; 936 } 937 938 // See if this device is a joystick. 939 // Ignore touchscreens because they use the same absolute axes for other purposes. 940 // Assumes that joysticks always have gamepad buttons in order to distinguish them 941 // from other devices such as accelerometers that also have absolute axes. 942 if (haveGamepadButtons 943 && !(device->classes & INPUT_DEVICE_CLASS_TOUCH) 944 && containsNonZeroByte(device->absBitmask, 0, sizeof_bit_array(ABS_MAX + 1))) { 945 device->classes |= INPUT_DEVICE_CLASS_JOYSTICK; 946 } 947 948 // Check whether this device has switches. 949 for (int i = 0; i <= SW_MAX; i++) { 950 if (test_bit(i, device->swBitmask)) { 951 device->classes |= INPUT_DEVICE_CLASS_SWITCH; 952 break; 953 } 954 } 955 956 // Configure virtual keys. 957 if ((device->classes & INPUT_DEVICE_CLASS_TOUCH)) { 958 // Load the virtual keys for the touch screen, if any. 959 // We do this now so that we can make sure to load the keymap if necessary. 960 status_t status = loadVirtualKeyMapLocked(device); 961 if (!status) { 962 device->classes |= INPUT_DEVICE_CLASS_KEYBOARD; 963 } 964 } 965 966 // Load the key map. 967 // We need to do this for joysticks too because the key layout may specify axes. 968 status_t keyMapStatus = NAME_NOT_FOUND; 969 if (device->classes & (INPUT_DEVICE_CLASS_KEYBOARD | INPUT_DEVICE_CLASS_JOYSTICK)) { 970 // Load the keymap for the device. 971 keyMapStatus = loadKeyMapLocked(device); 972 } 973 974 // Configure the keyboard, gamepad or virtual keyboard. 975 if (device->classes & INPUT_DEVICE_CLASS_KEYBOARD) { 976 // Set system properties for the keyboard. 977 setKeyboardPropertiesLocked(device, false); 978 979 // Register the keyboard as a built-in keyboard if it is eligible. 980 if (!keyMapStatus 981 && mBuiltInKeyboardId == -1 982 && isEligibleBuiltInKeyboard(device->identifier, 983 device->configuration, &device->keyMap)) { 984 mBuiltInKeyboardId = device->id; 985 setKeyboardPropertiesLocked(device, true); 986 } 987 988 // 'Q' key support = cheap test of whether this is an alpha-capable kbd 989 if (hasKeycodeLocked(device, AKEYCODE_Q)) { 990 device->classes |= INPUT_DEVICE_CLASS_ALPHAKEY; 991 } 992 993 // See if this device has a DPAD. 994 if (hasKeycodeLocked(device, AKEYCODE_DPAD_UP) && 995 hasKeycodeLocked(device, AKEYCODE_DPAD_DOWN) && 996 hasKeycodeLocked(device, AKEYCODE_DPAD_LEFT) && 997 hasKeycodeLocked(device, AKEYCODE_DPAD_RIGHT) && 998 hasKeycodeLocked(device, AKEYCODE_DPAD_CENTER)) { 999 device->classes |= INPUT_DEVICE_CLASS_DPAD; 1000 } 1001 1002 // See if this device has a gamepad. 1003 for (size_t i = 0; i < sizeof(GAMEPAD_KEYCODES)/sizeof(GAMEPAD_KEYCODES[0]); i++) { 1004 if (hasKeycodeLocked(device, GAMEPAD_KEYCODES[i])) { 1005 device->classes |= INPUT_DEVICE_CLASS_GAMEPAD; 1006 break; 1007 } 1008 } 1009 } 1010 1011 // If the device isn't recognized as something we handle, don't monitor it. 1012 if (device->classes == 0) { 1013 LOGV("Dropping device: id=%d, path='%s', name='%s'", 1014 deviceId, devicePath, device->identifier.name.string()); 1015 delete device; 1016 return -1; 1017 } 1018 1019 // Determine whether the device is external or internal. 1020 if (isExternalDeviceLocked(device)) { 1021 device->classes |= INPUT_DEVICE_CLASS_EXTERNAL; 1022 } 1023 1024 // Register with epoll. 1025 struct epoll_event eventItem; 1026 memset(&eventItem, 0, sizeof(eventItem)); 1027 eventItem.events = EPOLLIN; 1028 eventItem.data.u32 = deviceId; 1029 if (epoll_ctl(mEpollFd, EPOLL_CTL_ADD, fd, &eventItem)) { 1030 LOGE("Could not add device fd to epoll instance. errno=%d", errno); 1031 delete device; 1032 return -1; 1033 } 1034 1035 LOGI("New device: id=%d, fd=%d, path='%s', name='%s', classes=0x%x, " 1036 "configuration='%s', keyLayout='%s', keyCharacterMap='%s', builtinKeyboard=%s", 1037 deviceId, fd, devicePath, device->identifier.name.string(), 1038 device->classes, 1039 device->configurationFile.string(), 1040 device->keyMap.keyLayoutFile.string(), 1041 device->keyMap.keyCharacterMapFile.string(), 1042 toString(mBuiltInKeyboardId == deviceId)); 1043 1044 mDevices.add(deviceId, device); 1045 1046 device->next = mOpeningDevices; 1047 mOpeningDevices = device; 1048 return 0; 1049} 1050 1051void EventHub::loadConfigurationLocked(Device* device) { 1052 device->configurationFile = getInputDeviceConfigurationFilePathByDeviceIdentifier( 1053 device->identifier, INPUT_DEVICE_CONFIGURATION_FILE_TYPE_CONFIGURATION); 1054 if (device->configurationFile.isEmpty()) { 1055 LOGD("No input device configuration file found for device '%s'.", 1056 device->identifier.name.string()); 1057 } else { 1058 status_t status = PropertyMap::load(device->configurationFile, 1059 &device->configuration); 1060 if (status) { 1061 LOGE("Error loading input device configuration file for device '%s'. " 1062 "Using default configuration.", 1063 device->identifier.name.string()); 1064 } 1065 } 1066} 1067 1068status_t EventHub::loadVirtualKeyMapLocked(Device* device) { 1069 // The virtual key map is supplied by the kernel as a system board property file. 1070 String8 path; 1071 path.append("/sys/board_properties/virtualkeys."); 1072 path.append(device->identifier.name); 1073 if (access(path.string(), R_OK)) { 1074 return NAME_NOT_FOUND; 1075 } 1076 return VirtualKeyMap::load(path, &device->virtualKeyMap); 1077} 1078 1079status_t EventHub::loadKeyMapLocked(Device* device) { 1080 return device->keyMap.load(device->identifier, device->configuration); 1081} 1082 1083void EventHub::setKeyboardPropertiesLocked(Device* device, bool builtInKeyboard) { 1084 int32_t id = builtInKeyboard ? 0 : device->id; 1085 android::setKeyboardProperties(id, device->identifier, 1086 device->keyMap.keyLayoutFile, device->keyMap.keyCharacterMapFile); 1087} 1088 1089void EventHub::clearKeyboardPropertiesLocked(Device* device, bool builtInKeyboard) { 1090 int32_t id = builtInKeyboard ? 0 : device->id; 1091 android::clearKeyboardProperties(id); 1092} 1093 1094bool EventHub::isExternalDeviceLocked(Device* device) { 1095 if (device->configuration) { 1096 bool value; 1097 if (device->configuration->tryGetProperty(String8("device.internal"), value)) { 1098 return !value; 1099 } 1100 } 1101 return device->identifier.bus == BUS_USB || device->identifier.bus == BUS_BLUETOOTH; 1102} 1103 1104bool EventHub::hasKeycodeLocked(Device* device, int keycode) const { 1105 if (!device->keyMap.haveKeyLayout() || !device->keyBitmask) { 1106 return false; 1107 } 1108 1109 Vector<int32_t> scanCodes; 1110 device->keyMap.keyLayoutMap->findScanCodesForKey(keycode, &scanCodes); 1111 const size_t N = scanCodes.size(); 1112 for (size_t i=0; i<N && i<=KEY_MAX; i++) { 1113 int32_t sc = scanCodes.itemAt(i); 1114 if (sc >= 0 && sc <= KEY_MAX && test_bit(sc, device->keyBitmask)) { 1115 return true; 1116 } 1117 } 1118 1119 return false; 1120} 1121 1122status_t EventHub::closeDeviceByPathLocked(const char *devicePath) { 1123 Device* device = getDeviceByPathLocked(devicePath); 1124 if (device) { 1125 closeDeviceLocked(device); 1126 return 0; 1127 } 1128 LOGV("Remove device: %s not found, device may already have been removed.", devicePath); 1129 return -1; 1130} 1131 1132void EventHub::closeAllDevicesLocked() { 1133 while (mDevices.size() > 0) { 1134 closeDeviceLocked(mDevices.valueAt(mDevices.size() - 1)); 1135 } 1136} 1137 1138void EventHub::closeDeviceLocked(Device* device) { 1139 LOGI("Removed device: path=%s name=%s id=%d fd=%d classes=0x%x\n", 1140 device->path.string(), device->identifier.name.string(), device->id, 1141 device->fd, device->classes); 1142 1143 if (device->id == mBuiltInKeyboardId) { 1144 LOGW("built-in keyboard device %s (id=%d) is closing! the apps will not like this", 1145 device->path.string(), mBuiltInKeyboardId); 1146 mBuiltInKeyboardId = -1; 1147 clearKeyboardPropertiesLocked(device, true); 1148 } 1149 clearKeyboardPropertiesLocked(device, false); 1150 1151 if (epoll_ctl(mEpollFd, EPOLL_CTL_DEL, device->fd, NULL)) { 1152 LOGW("Could not remove device fd from epoll instance. errno=%d", errno); 1153 } 1154 1155 mDevices.removeItem(device->id); 1156 device->close(); 1157 1158 // Unlink for opening devices list if it is present. 1159 Device* pred = NULL; 1160 bool found = false; 1161 for (Device* entry = mOpeningDevices; entry != NULL; ) { 1162 if (entry == device) { 1163 found = true; 1164 break; 1165 } 1166 pred = entry; 1167 entry = entry->next; 1168 } 1169 if (found) { 1170 // Unlink the device from the opening devices list then delete it. 1171 // We don't need to tell the client that the device was closed because 1172 // it does not even know it was opened in the first place. 1173 LOGI("Device %s was immediately closed after opening.", device->path.string()); 1174 if (pred) { 1175 pred->next = device->next; 1176 } else { 1177 mOpeningDevices = device->next; 1178 } 1179 delete device; 1180 } else { 1181 // Link into closing devices list. 1182 // The device will be deleted later after we have informed the client. 1183 device->next = mClosingDevices; 1184 mClosingDevices = device; 1185 } 1186} 1187 1188status_t EventHub::readNotifyLocked() { 1189 int res; 1190 char devname[PATH_MAX]; 1191 char *filename; 1192 char event_buf[512]; 1193 int event_size; 1194 int event_pos = 0; 1195 struct inotify_event *event; 1196 1197 LOGV("EventHub::readNotify nfd: %d\n", mINotifyFd); 1198 res = read(mINotifyFd, event_buf, sizeof(event_buf)); 1199 if(res < (int)sizeof(*event)) { 1200 if(errno == EINTR) 1201 return 0; 1202 LOGW("could not get event, %s\n", strerror(errno)); 1203 return -1; 1204 } 1205 //printf("got %d bytes of event information\n", res); 1206 1207 strcpy(devname, DEVICE_PATH); 1208 filename = devname + strlen(devname); 1209 *filename++ = '/'; 1210 1211 while(res >= (int)sizeof(*event)) { 1212 event = (struct inotify_event *)(event_buf + event_pos); 1213 //printf("%d: %08x \"%s\"\n", event->wd, event->mask, event->len ? event->name : ""); 1214 if(event->len) { 1215 strcpy(filename, event->name); 1216 if(event->mask & IN_CREATE) { 1217 openDeviceLocked(devname); 1218 } else { 1219 closeDeviceByPathLocked(devname); 1220 } 1221 } 1222 event_size = sizeof(*event) + event->len; 1223 res -= event_size; 1224 event_pos += event_size; 1225 } 1226 return 0; 1227} 1228 1229status_t EventHub::scanDirLocked(const char *dirname) 1230{ 1231 char devname[PATH_MAX]; 1232 char *filename; 1233 DIR *dir; 1234 struct dirent *de; 1235 dir = opendir(dirname); 1236 if(dir == NULL) 1237 return -1; 1238 strcpy(devname, dirname); 1239 filename = devname + strlen(devname); 1240 *filename++ = '/'; 1241 while((de = readdir(dir))) { 1242 if(de->d_name[0] == '.' && 1243 (de->d_name[1] == '\0' || 1244 (de->d_name[1] == '.' && de->d_name[2] == '\0'))) 1245 continue; 1246 strcpy(filename, de->d_name); 1247 openDeviceLocked(devname); 1248 } 1249 closedir(dir); 1250 return 0; 1251} 1252 1253void EventHub::requestReopenDevices() { 1254 LOGV("requestReopenDevices() called"); 1255 1256 AutoMutex _l(mLock); 1257 mNeedToReopenDevices = true; 1258} 1259 1260void EventHub::dump(String8& dump) { 1261 dump.append("Event Hub State:\n"); 1262 1263 { // acquire lock 1264 AutoMutex _l(mLock); 1265 1266 dump.appendFormat(INDENT "BuiltInKeyboardId: %d\n", mBuiltInKeyboardId); 1267 1268 dump.append(INDENT "Devices:\n"); 1269 1270 for (size_t i = 0; i < mDevices.size(); i++) { 1271 const Device* device = mDevices.valueAt(i); 1272 if (mBuiltInKeyboardId == device->id) { 1273 dump.appendFormat(INDENT2 "%d: %s (aka device 0 - built-in keyboard)\n", 1274 device->id, device->identifier.name.string()); 1275 } else { 1276 dump.appendFormat(INDENT2 "%d: %s\n", device->id, 1277 device->identifier.name.string()); 1278 } 1279 dump.appendFormat(INDENT3 "Classes: 0x%08x\n", device->classes); 1280 dump.appendFormat(INDENT3 "Path: %s\n", device->path.string()); 1281 dump.appendFormat(INDENT3 "Location: %s\n", device->identifier.location.string()); 1282 dump.appendFormat(INDENT3 "UniqueId: %s\n", device->identifier.uniqueId.string()); 1283 dump.appendFormat(INDENT3 "Identifier: bus=0x%04x, vendor=0x%04x, " 1284 "product=0x%04x, version=0x%04x\n", 1285 device->identifier.bus, device->identifier.vendor, 1286 device->identifier.product, device->identifier.version); 1287 dump.appendFormat(INDENT3 "KeyLayoutFile: %s\n", 1288 device->keyMap.keyLayoutFile.string()); 1289 dump.appendFormat(INDENT3 "KeyCharacterMapFile: %s\n", 1290 device->keyMap.keyCharacterMapFile.string()); 1291 dump.appendFormat(INDENT3 "ConfigurationFile: %s\n", 1292 device->configurationFile.string()); 1293 } 1294 } // release lock 1295} 1296 1297void EventHub::monitor() { 1298 // Acquire and release the lock to ensure that the event hub has not deadlocked. 1299 mLock.lock(); 1300 mLock.unlock(); 1301} 1302 1303 1304}; // namespace android 1305