EventHub.cpp revision 49754db5a304d995c1cc108ff6f19e4ba4265572
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 AutoMutex _l(mLock); 209 Device* device = getDeviceLocked(deviceId); 210 if (device == NULL) return -1; 211 212 struct input_absinfo info; 213 214 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 231bool EventHub::hasRelativeAxis(int32_t deviceId, int axis) const { 232 if (axis >= 0 && axis <= REL_MAX) { 233 AutoMutex _l(mLock); 234 235 Device* device = getDeviceLocked(deviceId); 236 if (device && device->relBitmask) { 237 return test_bit(axis, device->relBitmask); 238 } 239 } 240 return false; 241} 242 243bool EventHub::hasInputProperty(int32_t deviceId, int property) const { 244 if (property >= 0 && property <= INPUT_PROP_MAX) { 245 AutoMutex _l(mLock); 246 247 Device* device = getDeviceLocked(deviceId); 248 if (device && device->propBitmask) { 249 return test_bit(property, device->propBitmask); 250 } 251 } 252 return false; 253} 254 255int32_t EventHub::getScanCodeState(int32_t deviceId, int32_t scanCode) const { 256 if (scanCode >= 0 && scanCode <= KEY_MAX) { 257 AutoMutex _l(mLock); 258 259 Device* device = getDeviceLocked(deviceId); 260 if (device != NULL) { 261 return getScanCodeStateLocked(device, scanCode); 262 } 263 } 264 return AKEY_STATE_UNKNOWN; 265} 266 267int32_t EventHub::getScanCodeStateLocked(Device* device, int32_t scanCode) const { 268 uint8_t key_bitmask[sizeof_bit_array(KEY_MAX + 1)]; 269 memset(key_bitmask, 0, sizeof(key_bitmask)); 270 if (ioctl(device->fd, 271 EVIOCGKEY(sizeof(key_bitmask)), key_bitmask) >= 0) { 272 return test_bit(scanCode, key_bitmask) ? AKEY_STATE_DOWN : AKEY_STATE_UP; 273 } 274 return AKEY_STATE_UNKNOWN; 275} 276 277int32_t EventHub::getKeyCodeState(int32_t deviceId, int32_t keyCode) const { 278 AutoMutex _l(mLock); 279 280 Device* device = getDeviceLocked(deviceId); 281 if (device != NULL) { 282 return getKeyCodeStateLocked(device, keyCode); 283 } 284 return AKEY_STATE_UNKNOWN; 285} 286 287int32_t EventHub::getKeyCodeStateLocked(Device* device, int32_t keyCode) const { 288 if (!device->keyMap.haveKeyLayout()) { 289 return AKEY_STATE_UNKNOWN; 290 } 291 292 Vector<int32_t> scanCodes; 293 device->keyMap.keyLayoutMap->findScanCodesForKey(keyCode, &scanCodes); 294 295 uint8_t key_bitmask[sizeof_bit_array(KEY_MAX + 1)]; 296 memset(key_bitmask, 0, sizeof(key_bitmask)); 297 if (ioctl(device->fd, EVIOCGKEY(sizeof(key_bitmask)), key_bitmask) >= 0) { 298 #if 0 299 for (size_t i=0; i<=KEY_MAX; i++) { 300 LOGI("(Scan code %d: down=%d)", i, test_bit(i, key_bitmask)); 301 } 302 #endif 303 const size_t N = scanCodes.size(); 304 for (size_t i=0; i<N && i<=KEY_MAX; i++) { 305 int32_t sc = scanCodes.itemAt(i); 306 //LOGI("Code %d: down=%d", sc, test_bit(sc, key_bitmask)); 307 if (sc >= 0 && sc <= KEY_MAX && test_bit(sc, key_bitmask)) { 308 return AKEY_STATE_DOWN; 309 } 310 } 311 return AKEY_STATE_UP; 312 } 313 return AKEY_STATE_UNKNOWN; 314} 315 316int32_t EventHub::getSwitchState(int32_t deviceId, int32_t sw) const { 317 if (sw >= 0 && sw <= SW_MAX) { 318 AutoMutex _l(mLock); 319 320 Device* device = getDeviceLocked(deviceId); 321 if (device != NULL) { 322 return getSwitchStateLocked(device, sw); 323 } 324 } 325 return AKEY_STATE_UNKNOWN; 326} 327 328int32_t EventHub::getSwitchStateLocked(Device* device, int32_t sw) const { 329 uint8_t sw_bitmask[sizeof_bit_array(SW_MAX + 1)]; 330 memset(sw_bitmask, 0, sizeof(sw_bitmask)); 331 if (ioctl(device->fd, 332 EVIOCGSW(sizeof(sw_bitmask)), sw_bitmask) >= 0) { 333 return test_bit(sw, sw_bitmask) ? AKEY_STATE_DOWN : AKEY_STATE_UP; 334 } 335 return AKEY_STATE_UNKNOWN; 336} 337 338status_t EventHub::getAbsoluteAxisValue(int32_t deviceId, int32_t axis, int32_t* outValue) const { 339 if (axis >= 0 && axis <= ABS_MAX) { 340 AutoMutex _l(mLock); 341 342 Device* device = getDeviceLocked(deviceId); 343 if (device != NULL) { 344 return getAbsoluteAxisValueLocked(device, axis, outValue); 345 } 346 } 347 *outValue = 0; 348 return -1; 349} 350 351status_t EventHub::getAbsoluteAxisValueLocked(Device* device, int32_t axis, 352 int32_t* outValue) const { 353 struct input_absinfo info; 354 355 if(ioctl(device->fd, EVIOCGABS(axis), &info)) { 356 LOGW("Error reading absolute controller %d for device %s fd %d, errno=%d", 357 axis, device->identifier.name.string(), device->fd, errno); 358 return -errno; 359 } 360 361 *outValue = info.value; 362 return OK; 363} 364 365bool EventHub::markSupportedKeyCodes(int32_t deviceId, size_t numCodes, 366 const int32_t* keyCodes, uint8_t* outFlags) const { 367 AutoMutex _l(mLock); 368 369 Device* device = getDeviceLocked(deviceId); 370 if (device != NULL) { 371 return markSupportedKeyCodesLocked(device, numCodes, keyCodes, outFlags); 372 } 373 return false; 374} 375 376bool EventHub::markSupportedKeyCodesLocked(Device* device, size_t numCodes, 377 const int32_t* keyCodes, uint8_t* outFlags) const { 378 if (!device->keyMap.haveKeyLayout()) { 379 return false; 380 } 381 382 Vector<int32_t> scanCodes; 383 for (size_t codeIndex = 0; codeIndex < numCodes; codeIndex++) { 384 scanCodes.clear(); 385 386 status_t err = device->keyMap.keyLayoutMap->findScanCodesForKey( 387 keyCodes[codeIndex], &scanCodes); 388 if (! err) { 389 // check the possible scan codes identified by the layout map against the 390 // map of codes actually emitted by the driver 391 for (size_t sc = 0; sc < scanCodes.size(); sc++) { 392 if (test_bit(scanCodes[sc], device->keyBitmask)) { 393 outFlags[codeIndex] = 1; 394 break; 395 } 396 } 397 } 398 } 399 return true; 400} 401 402status_t EventHub::mapKey(int32_t deviceId, int scancode, 403 int32_t* outKeycode, uint32_t* outFlags) const 404{ 405 AutoMutex _l(mLock); 406 Device* device = getDeviceLocked(deviceId); 407 408 if (device && device->keyMap.haveKeyLayout()) { 409 status_t err = device->keyMap.keyLayoutMap->mapKey(scancode, outKeycode, outFlags); 410 if (err == NO_ERROR) { 411 return NO_ERROR; 412 } 413 } 414 415 if (mBuiltInKeyboardId != -1) { 416 device = getDeviceLocked(mBuiltInKeyboardId); 417 418 if (device && device->keyMap.haveKeyLayout()) { 419 status_t err = device->keyMap.keyLayoutMap->mapKey(scancode, outKeycode, outFlags); 420 if (err == NO_ERROR) { 421 return NO_ERROR; 422 } 423 } 424 } 425 426 *outKeycode = 0; 427 *outFlags = 0; 428 return NAME_NOT_FOUND; 429} 430 431status_t EventHub::mapAxis(int32_t deviceId, int scancode, AxisInfo* outAxisInfo) const 432{ 433 AutoMutex _l(mLock); 434 Device* device = getDeviceLocked(deviceId); 435 436 if (device && device->keyMap.haveKeyLayout()) { 437 status_t err = device->keyMap.keyLayoutMap->mapAxis(scancode, outAxisInfo); 438 if (err == NO_ERROR) { 439 return NO_ERROR; 440 } 441 } 442 443 if (mBuiltInKeyboardId != -1) { 444 device = getDeviceLocked(mBuiltInKeyboardId); 445 446 if (device && device->keyMap.haveKeyLayout()) { 447 status_t err = device->keyMap.keyLayoutMap->mapAxis(scancode, outAxisInfo); 448 if (err == NO_ERROR) { 449 return NO_ERROR; 450 } 451 } 452 } 453 454 return NAME_NOT_FOUND; 455} 456 457void EventHub::setExcludedDevices(const Vector<String8>& devices) { 458 AutoMutex _l(mLock); 459 460 mExcludedDevices = devices; 461} 462 463bool EventHub::hasScanCode(int32_t deviceId, int32_t scanCode) const { 464 AutoMutex _l(mLock); 465 Device* device = getDeviceLocked(deviceId); 466 if (device && scanCode >= 0 && scanCode <= KEY_MAX) { 467 if (test_bit(scanCode, device->keyBitmask)) { 468 return true; 469 } 470 } 471 return false; 472} 473 474bool EventHub::hasLed(int32_t deviceId, int32_t led) const { 475 AutoMutex _l(mLock); 476 Device* device = getDeviceLocked(deviceId); 477 if (device && led >= 0 && led <= LED_MAX) { 478 if (test_bit(led, device->ledBitmask)) { 479 return true; 480 } 481 } 482 return false; 483} 484 485void EventHub::setLedState(int32_t deviceId, int32_t led, bool on) { 486 AutoMutex _l(mLock); 487 Device* device = getDeviceLocked(deviceId); 488 if (device && led >= 0 && led <= LED_MAX) { 489 struct input_event ev; 490 ev.time.tv_sec = 0; 491 ev.time.tv_usec = 0; 492 ev.type = EV_LED; 493 ev.code = led; 494 ev.value = on ? 1 : 0; 495 496 ssize_t nWrite; 497 do { 498 nWrite = write(device->fd, &ev, sizeof(struct input_event)); 499 } while (nWrite == -1 && errno == EINTR); 500 } 501} 502 503void EventHub::getVirtualKeyDefinitions(int32_t deviceId, 504 Vector<VirtualKeyDefinition>& outVirtualKeys) const { 505 outVirtualKeys.clear(); 506 507 AutoMutex _l(mLock); 508 Device* device = getDeviceLocked(deviceId); 509 if (device && device->virtualKeyMap) { 510 outVirtualKeys.appendVector(device->virtualKeyMap->getVirtualKeys()); 511 } 512} 513 514EventHub::Device* EventHub::getDeviceLocked(int32_t deviceId) const { 515 if (deviceId == 0) { 516 deviceId = mBuiltInKeyboardId; 517 } 518 ssize_t index = mDevices.indexOfKey(deviceId); 519 return index >= 0 ? mDevices.valueAt(index) : NULL; 520} 521 522EventHub::Device* EventHub::getDeviceByPathLocked(const char* devicePath) const { 523 for (size_t i = 0; i < mDevices.size(); i++) { 524 Device* device = mDevices.valueAt(i); 525 if (device->path == devicePath) { 526 return device; 527 } 528 } 529 return NULL; 530} 531 532size_t EventHub::getEvents(int timeoutMillis, RawEvent* buffer, size_t bufferSize) { 533 LOG_ASSERT(bufferSize >= 1); 534 535 AutoMutex _l(mLock); 536 537 struct input_event readBuffer[bufferSize]; 538 539 RawEvent* event = buffer; 540 size_t capacity = bufferSize; 541 bool awoken = false; 542 for (;;) { 543 nsecs_t now = systemTime(SYSTEM_TIME_MONOTONIC); 544 545 // Reopen input devices if needed. 546 if (mNeedToReopenDevices) { 547 mNeedToReopenDevices = false; 548 549 LOGI("Reopening all input devices due to a configuration change."); 550 551 closeAllDevicesLocked(); 552 mNeedToScanDevices = true; 553 break; // return to the caller before we actually rescan 554 } 555 556 // Report any devices that had last been added/removed. 557 while (mClosingDevices) { 558 Device* device = mClosingDevices; 559 LOGV("Reporting device closed: id=%d, name=%s\n", 560 device->id, device->path.string()); 561 mClosingDevices = device->next; 562 event->when = now; 563 event->deviceId = device->id == mBuiltInKeyboardId ? 0 : device->id; 564 event->type = DEVICE_REMOVED; 565 event += 1; 566 delete device; 567 mNeedToSendFinishedDeviceScan = true; 568 if (--capacity == 0) { 569 break; 570 } 571 } 572 573 if (mNeedToScanDevices) { 574 mNeedToScanDevices = false; 575 scanDevicesLocked(); 576 mNeedToSendFinishedDeviceScan = true; 577 } 578 579 while (mOpeningDevices != NULL) { 580 Device* device = mOpeningDevices; 581 LOGV("Reporting device opened: id=%d, name=%s\n", 582 device->id, device->path.string()); 583 mOpeningDevices = device->next; 584 event->when = now; 585 event->deviceId = device->id == mBuiltInKeyboardId ? 0 : device->id; 586 event->type = DEVICE_ADDED; 587 event += 1; 588 mNeedToSendFinishedDeviceScan = true; 589 if (--capacity == 0) { 590 break; 591 } 592 } 593 594 if (mNeedToSendFinishedDeviceScan) { 595 mNeedToSendFinishedDeviceScan = false; 596 event->when = now; 597 event->type = FINISHED_DEVICE_SCAN; 598 event += 1; 599 if (--capacity == 0) { 600 break; 601 } 602 } 603 604 // Grab the next input event. 605 bool deviceChanged = false; 606 while (mPendingEventIndex < mPendingEventCount) { 607 const struct epoll_event& eventItem = mPendingEventItems[mPendingEventIndex++]; 608 if (eventItem.data.u32 == EPOLL_ID_INOTIFY) { 609 if (eventItem.events & EPOLLIN) { 610 mPendingINotify = true; 611 } else { 612 LOGW("Received unexpected epoll event 0x%08x for INotify.", eventItem.events); 613 } 614 continue; 615 } 616 617 if (eventItem.data.u32 == EPOLL_ID_WAKE) { 618 if (eventItem.events & EPOLLIN) { 619 LOGV("awoken after wake()"); 620 awoken = true; 621 char buffer[16]; 622 ssize_t nRead; 623 do { 624 nRead = read(mWakeReadPipeFd, buffer, sizeof(buffer)); 625 } while ((nRead == -1 && errno == EINTR) || nRead == sizeof(buffer)); 626 } else { 627 LOGW("Received unexpected epoll event 0x%08x for wake read pipe.", 628 eventItem.events); 629 } 630 continue; 631 } 632 633 ssize_t deviceIndex = mDevices.indexOfKey(eventItem.data.u32); 634 if (deviceIndex < 0) { 635 LOGW("Received unexpected epoll event 0x%08x for unknown device id %d.", 636 eventItem.events, eventItem.data.u32); 637 continue; 638 } 639 640 Device* device = mDevices.valueAt(deviceIndex); 641 if (eventItem.events & EPOLLIN) { 642 int32_t readSize = read(device->fd, readBuffer, 643 sizeof(struct input_event) * capacity); 644 if (readSize == 0 || (readSize < 0 && errno == ENODEV)) { 645 // Device was removed before INotify noticed. 646 deviceChanged = true; 647 closeDeviceLocked(device); 648 } else if (readSize < 0) { 649 if (errno != EAGAIN && errno != EINTR) { 650 LOGW("could not get event (errno=%d)", errno); 651 } 652 } else if ((readSize % sizeof(struct input_event)) != 0) { 653 LOGE("could not get event (wrong size: %d)", readSize); 654 } else { 655 int32_t deviceId = device->id == mBuiltInKeyboardId ? 0 : device->id; 656 657 size_t count = size_t(readSize) / sizeof(struct input_event); 658 for (size_t i = 0; i < count; i++) { 659 const struct input_event& iev = readBuffer[i]; 660 LOGV("%s got: t0=%d, t1=%d, type=%d, code=%d, value=%d", 661 device->path.string(), 662 (int) iev.time.tv_sec, (int) iev.time.tv_usec, 663 iev.type, iev.code, iev.value); 664 665#ifdef HAVE_POSIX_CLOCKS 666 // Use the time specified in the event instead of the current time 667 // so that downstream code can get more accurate estimates of 668 // event dispatch latency from the time the event is enqueued onto 669 // the evdev client buffer. 670 // 671 // The event's timestamp fortuitously uses the same monotonic clock 672 // time base as the rest of Android. The kernel event device driver 673 // (drivers/input/evdev.c) obtains timestamps using ktime_get_ts(). 674 // The systemTime(SYSTEM_TIME_MONOTONIC) function we use everywhere 675 // calls clock_gettime(CLOCK_MONOTONIC) which is implemented as a 676 // system call that also queries ktime_get_ts(). 677 event->when = nsecs_t(iev.time.tv_sec) * 1000000000LL 678 + nsecs_t(iev.time.tv_usec) * 1000LL; 679 LOGV("event time %lld, now %lld", event->when, now); 680#else 681 event->when = now; 682#endif 683 event->deviceId = deviceId; 684 event->type = iev.type; 685 event->scanCode = iev.code; 686 event->value = iev.value; 687 event->keyCode = AKEYCODE_UNKNOWN; 688 event->flags = 0; 689 if (iev.type == EV_KEY && device->keyMap.haveKeyLayout()) { 690 status_t err = device->keyMap.keyLayoutMap->mapKey(iev.code, 691 &event->keyCode, &event->flags); 692 LOGV("iev.code=%d keyCode=%d flags=0x%08x err=%d\n", 693 iev.code, event->keyCode, event->flags, err); 694 } 695 event += 1; 696 } 697 capacity -= count; 698 if (capacity == 0) { 699 // The result buffer is full. Reset the pending event index 700 // so we will try to read the device again on the next iteration. 701 mPendingEventIndex -= 1; 702 break; 703 } 704 } 705 } else { 706 LOGW("Received unexpected epoll event 0x%08x for device %s.", 707 eventItem.events, device->identifier.name.string()); 708 } 709 } 710 711 // readNotify() will modify the list of devices so this must be done after 712 // processing all other events to ensure that we read all remaining events 713 // before closing the devices. 714 if (mPendingINotify && mPendingEventIndex >= mPendingEventCount) { 715 mPendingINotify = false; 716 readNotifyLocked(); 717 deviceChanged = true; 718 } 719 720 // Report added or removed devices immediately. 721 if (deviceChanged) { 722 continue; 723 } 724 725 // Return now if we have collected any events or if we were explicitly awoken. 726 if (event != buffer || awoken) { 727 break; 728 } 729 730 // Poll for events. Mind the wake lock dance! 731 // We hold a wake lock at all times except during epoll_wait(). This works due to some 732 // subtle choreography. When a device driver has pending (unread) events, it acquires 733 // a kernel wake lock. However, once the last pending event has been read, the device 734 // driver will release the kernel wake lock. To prevent the system from going to sleep 735 // when this happens, the EventHub holds onto its own user wake lock while the client 736 // is processing events. Thus the system can only sleep if there are no events 737 // pending or currently being processed. 738 // 739 // The timeout is advisory only. If the device is asleep, it will not wake just to 740 // service the timeout. 741 mPendingEventIndex = 0; 742 743 mLock.unlock(); // release lock before poll, must be before release_wake_lock 744 release_wake_lock(WAKE_LOCK_ID); 745 746 int pollResult = epoll_wait(mEpollFd, mPendingEventItems, EPOLL_MAX_EVENTS, timeoutMillis); 747 748 acquire_wake_lock(PARTIAL_WAKE_LOCK, WAKE_LOCK_ID); 749 mLock.lock(); // reacquire lock after poll, must be after acquire_wake_lock 750 751 if (pollResult == 0) { 752 // Timed out. 753 mPendingEventCount = 0; 754 break; 755 } 756 757 if (pollResult < 0) { 758 // An error occurred. 759 mPendingEventCount = 0; 760 761 // Sleep after errors to avoid locking up the system. 762 // Hopefully the error is transient. 763 if (errno != EINTR) { 764 LOGW("poll failed (errno=%d)\n", errno); 765 usleep(100000); 766 } 767 } else { 768 // Some events occurred. 769 mPendingEventCount = size_t(pollResult); 770 771 // On an SMP system, it is possible for the framework to read input events 772 // faster than the kernel input device driver can produce a complete packet. 773 // Because poll() wakes up as soon as the first input event becomes available, 774 // the framework will often end up reading one event at a time until the 775 // packet is complete. Instead of one call to read() returning 71 events, 776 // it could take 71 calls to read() each returning 1 event. 777 // 778 // Sleep for a short period of time after waking up from the poll() to give 779 // the kernel time to finish writing the entire packet of input events. 780 if (mNumCpus > 1) { 781 usleep(250); 782 } 783 } 784 } 785 786 // All done, return the number of events we read. 787 return event - buffer; 788} 789 790void EventHub::wake() { 791 LOGV("wake() called"); 792 793 ssize_t nWrite; 794 do { 795 nWrite = write(mWakeWritePipeFd, "W", 1); 796 } while (nWrite == -1 && errno == EINTR); 797 798 if (nWrite != 1 && errno != EAGAIN) { 799 LOGW("Could not write wake signal, errno=%d", errno); 800 } 801} 802 803void EventHub::scanDevicesLocked() { 804 status_t res = scanDirLocked(DEVICE_PATH); 805 if(res < 0) { 806 LOGE("scan dir failed for %s\n", DEVICE_PATH); 807 } 808} 809 810// ---------------------------------------------------------------------------- 811 812static bool containsNonZeroByte(const uint8_t* array, uint32_t startIndex, uint32_t endIndex) { 813 const uint8_t* end = array + endIndex; 814 array += startIndex; 815 while (array != end) { 816 if (*(array++) != 0) { 817 return true; 818 } 819 } 820 return false; 821} 822 823static const int32_t GAMEPAD_KEYCODES[] = { 824 AKEYCODE_BUTTON_A, AKEYCODE_BUTTON_B, AKEYCODE_BUTTON_C, 825 AKEYCODE_BUTTON_X, AKEYCODE_BUTTON_Y, AKEYCODE_BUTTON_Z, 826 AKEYCODE_BUTTON_L1, AKEYCODE_BUTTON_R1, 827 AKEYCODE_BUTTON_L2, AKEYCODE_BUTTON_R2, 828 AKEYCODE_BUTTON_THUMBL, AKEYCODE_BUTTON_THUMBR, 829 AKEYCODE_BUTTON_START, AKEYCODE_BUTTON_SELECT, AKEYCODE_BUTTON_MODE, 830 AKEYCODE_BUTTON_1, AKEYCODE_BUTTON_2, AKEYCODE_BUTTON_3, AKEYCODE_BUTTON_4, 831 AKEYCODE_BUTTON_5, AKEYCODE_BUTTON_6, AKEYCODE_BUTTON_7, AKEYCODE_BUTTON_8, 832 AKEYCODE_BUTTON_9, AKEYCODE_BUTTON_10, AKEYCODE_BUTTON_11, AKEYCODE_BUTTON_12, 833 AKEYCODE_BUTTON_13, AKEYCODE_BUTTON_14, AKEYCODE_BUTTON_15, AKEYCODE_BUTTON_16, 834}; 835 836status_t EventHub::openDeviceLocked(const char *devicePath) { 837 char buffer[80]; 838 839 LOGV("Opening device: %s", devicePath); 840 841 int fd = open(devicePath, O_RDWR); 842 if(fd < 0) { 843 LOGE("could not open %s, %s\n", devicePath, strerror(errno)); 844 return -1; 845 } 846 847 InputDeviceIdentifier identifier; 848 849 // Get device name. 850 if(ioctl(fd, EVIOCGNAME(sizeof(buffer) - 1), &buffer) < 1) { 851 //fprintf(stderr, "could not get device name for %s, %s\n", devicePath, strerror(errno)); 852 } else { 853 buffer[sizeof(buffer) - 1] = '\0'; 854 identifier.name.setTo(buffer); 855 } 856 857 // Check to see if the device is on our excluded list 858 for (size_t i = 0; i < mExcludedDevices.size(); i++) { 859 const String8& item = mExcludedDevices.itemAt(i); 860 if (identifier.name == item) { 861 LOGI("ignoring event id %s driver %s\n", devicePath, item.string()); 862 close(fd); 863 return -1; 864 } 865 } 866 867 // Get device driver version. 868 int driverVersion; 869 if(ioctl(fd, EVIOCGVERSION, &driverVersion)) { 870 LOGE("could not get driver version for %s, %s\n", devicePath, strerror(errno)); 871 close(fd); 872 return -1; 873 } 874 875 // Get device identifier. 876 struct input_id inputId; 877 if(ioctl(fd, EVIOCGID, &inputId)) { 878 LOGE("could not get device input id for %s, %s\n", devicePath, strerror(errno)); 879 close(fd); 880 return -1; 881 } 882 identifier.bus = inputId.bustype; 883 identifier.product = inputId.product; 884 identifier.vendor = inputId.vendor; 885 identifier.version = inputId.version; 886 887 // Get device physical location. 888 if(ioctl(fd, EVIOCGPHYS(sizeof(buffer) - 1), &buffer) < 1) { 889 //fprintf(stderr, "could not get location for %s, %s\n", devicePath, strerror(errno)); 890 } else { 891 buffer[sizeof(buffer) - 1] = '\0'; 892 identifier.location.setTo(buffer); 893 } 894 895 // Get device unique id. 896 if(ioctl(fd, EVIOCGUNIQ(sizeof(buffer) - 1), &buffer) < 1) { 897 //fprintf(stderr, "could not get idstring for %s, %s\n", devicePath, strerror(errno)); 898 } else { 899 buffer[sizeof(buffer) - 1] = '\0'; 900 identifier.uniqueId.setTo(buffer); 901 } 902 903 // Make file descriptor non-blocking for use with poll(). 904 if (fcntl(fd, F_SETFL, O_NONBLOCK)) { 905 LOGE("Error %d making device file descriptor non-blocking.", errno); 906 close(fd); 907 return -1; 908 } 909 910 // Allocate device. (The device object takes ownership of the fd at this point.) 911 int32_t deviceId = mNextDeviceId++; 912 Device* device = new Device(fd, deviceId, String8(devicePath), identifier); 913 914#if 0 915 LOGI("add device %d: %s\n", deviceId, devicePath); 916 LOGI(" bus: %04x\n" 917 " vendor %04x\n" 918 " product %04x\n" 919 " version %04x\n", 920 identifier.bus, identifier.vendor, identifier.product, identifier.version); 921 LOGI(" name: \"%s\"\n", identifier.name.string()); 922 LOGI(" location: \"%s\"\n", identifier.location.string()); 923 LOGI(" unique id: \"%s\"\n", identifier.uniqueId.string()); 924 LOGI(" driver: v%d.%d.%d\n", 925 driverVersion >> 16, (driverVersion >> 8) & 0xff, driverVersion & 0xff); 926#endif 927 928 // Load the configuration file for the device. 929 loadConfigurationLocked(device); 930 931 // Figure out the kinds of events the device reports. 932 ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(device->keyBitmask)), device->keyBitmask); 933 ioctl(fd, EVIOCGBIT(EV_ABS, sizeof(device->absBitmask)), device->absBitmask); 934 ioctl(fd, EVIOCGBIT(EV_REL, sizeof(device->relBitmask)), device->relBitmask); 935 ioctl(fd, EVIOCGBIT(EV_SW, sizeof(device->swBitmask)), device->swBitmask); 936 ioctl(fd, EVIOCGBIT(EV_LED, sizeof(device->ledBitmask)), device->ledBitmask); 937 ioctl(fd, EVIOCGPROP(sizeof(device->propBitmask)), device->propBitmask); 938 939 // See if this is a keyboard. Ignore everything in the button range except for 940 // joystick and gamepad buttons which are handled like keyboards for the most part. 941 bool haveKeyboardKeys = containsNonZeroByte(device->keyBitmask, 0, sizeof_bit_array(BTN_MISC)) 942 || containsNonZeroByte(device->keyBitmask, sizeof_bit_array(KEY_OK), 943 sizeof_bit_array(KEY_MAX + 1)); 944 bool haveGamepadButtons = containsNonZeroByte(device->keyBitmask, sizeof_bit_array(BTN_MISC), 945 sizeof_bit_array(BTN_MOUSE)) 946 || containsNonZeroByte(device->keyBitmask, sizeof_bit_array(BTN_JOYSTICK), 947 sizeof_bit_array(BTN_DIGI)); 948 if (haveKeyboardKeys || haveGamepadButtons) { 949 device->classes |= INPUT_DEVICE_CLASS_KEYBOARD; 950 } 951 952 // See if this is a cursor device such as a trackball or mouse. 953 if (test_bit(BTN_MOUSE, device->keyBitmask) 954 && test_bit(REL_X, device->relBitmask) 955 && test_bit(REL_Y, device->relBitmask)) { 956 device->classes |= INPUT_DEVICE_CLASS_CURSOR; 957 } 958 959 // See if this is a touch pad. 960 // Is this a new modern multi-touch driver? 961 if (test_bit(ABS_MT_POSITION_X, device->absBitmask) 962 && test_bit(ABS_MT_POSITION_Y, device->absBitmask)) { 963 // Some joysticks such as the PS3 controller report axes that conflict 964 // with the ABS_MT range. Try to confirm that the device really is 965 // a touch screen. 966 if (test_bit(BTN_TOUCH, device->keyBitmask) || !haveGamepadButtons) { 967 device->classes |= INPUT_DEVICE_CLASS_TOUCH | INPUT_DEVICE_CLASS_TOUCH_MT; 968 } 969 // Is this an old style single-touch driver? 970 } else if (test_bit(BTN_TOUCH, device->keyBitmask) 971 && test_bit(ABS_X, device->absBitmask) 972 && test_bit(ABS_Y, device->absBitmask)) { 973 device->classes |= INPUT_DEVICE_CLASS_TOUCH; 974 } 975 976 // See if this device is a joystick. 977 // Ignore touchscreens because they use the same absolute axes for other purposes. 978 // Assumes that joysticks always have gamepad buttons in order to distinguish them 979 // from other devices such as accelerometers that also have absolute axes. 980 if (haveGamepadButtons 981 && !(device->classes & INPUT_DEVICE_CLASS_TOUCH) 982 && containsNonZeroByte(device->absBitmask, 0, sizeof_bit_array(ABS_MAX + 1))) { 983 device->classes |= INPUT_DEVICE_CLASS_JOYSTICK; 984 } 985 986 // Check whether this device has switches. 987 for (int i = 0; i <= SW_MAX; i++) { 988 if (test_bit(i, device->swBitmask)) { 989 device->classes |= INPUT_DEVICE_CLASS_SWITCH; 990 break; 991 } 992 } 993 994 // Configure virtual keys. 995 if ((device->classes & INPUT_DEVICE_CLASS_TOUCH)) { 996 // Load the virtual keys for the touch screen, if any. 997 // We do this now so that we can make sure to load the keymap if necessary. 998 status_t status = loadVirtualKeyMapLocked(device); 999 if (!status) { 1000 device->classes |= INPUT_DEVICE_CLASS_KEYBOARD; 1001 } 1002 } 1003 1004 // Load the key map. 1005 // We need to do this for joysticks too because the key layout may specify axes. 1006 status_t keyMapStatus = NAME_NOT_FOUND; 1007 if (device->classes & (INPUT_DEVICE_CLASS_KEYBOARD | INPUT_DEVICE_CLASS_JOYSTICK)) { 1008 // Load the keymap for the device. 1009 keyMapStatus = loadKeyMapLocked(device); 1010 } 1011 1012 // Configure the keyboard, gamepad or virtual keyboard. 1013 if (device->classes & INPUT_DEVICE_CLASS_KEYBOARD) { 1014 // Set system properties for the keyboard. 1015 setKeyboardPropertiesLocked(device, false); 1016 1017 // Register the keyboard as a built-in keyboard if it is eligible. 1018 if (!keyMapStatus 1019 && mBuiltInKeyboardId == -1 1020 && isEligibleBuiltInKeyboard(device->identifier, 1021 device->configuration, &device->keyMap)) { 1022 mBuiltInKeyboardId = device->id; 1023 setKeyboardPropertiesLocked(device, true); 1024 } 1025 1026 // 'Q' key support = cheap test of whether this is an alpha-capable kbd 1027 if (hasKeycodeLocked(device, AKEYCODE_Q)) { 1028 device->classes |= INPUT_DEVICE_CLASS_ALPHAKEY; 1029 } 1030 1031 // See if this device has a DPAD. 1032 if (hasKeycodeLocked(device, AKEYCODE_DPAD_UP) && 1033 hasKeycodeLocked(device, AKEYCODE_DPAD_DOWN) && 1034 hasKeycodeLocked(device, AKEYCODE_DPAD_LEFT) && 1035 hasKeycodeLocked(device, AKEYCODE_DPAD_RIGHT) && 1036 hasKeycodeLocked(device, AKEYCODE_DPAD_CENTER)) { 1037 device->classes |= INPUT_DEVICE_CLASS_DPAD; 1038 } 1039 1040 // See if this device has a gamepad. 1041 for (size_t i = 0; i < sizeof(GAMEPAD_KEYCODES)/sizeof(GAMEPAD_KEYCODES[0]); i++) { 1042 if (hasKeycodeLocked(device, GAMEPAD_KEYCODES[i])) { 1043 device->classes |= INPUT_DEVICE_CLASS_GAMEPAD; 1044 break; 1045 } 1046 } 1047 } 1048 1049 // If the device isn't recognized as something we handle, don't monitor it. 1050 if (device->classes == 0) { 1051 LOGV("Dropping device: id=%d, path='%s', name='%s'", 1052 deviceId, devicePath, device->identifier.name.string()); 1053 delete device; 1054 return -1; 1055 } 1056 1057 // Determine whether the device is external or internal. 1058 if (isExternalDeviceLocked(device)) { 1059 device->classes |= INPUT_DEVICE_CLASS_EXTERNAL; 1060 } 1061 1062 // Register with epoll. 1063 struct epoll_event eventItem; 1064 memset(&eventItem, 0, sizeof(eventItem)); 1065 eventItem.events = EPOLLIN; 1066 eventItem.data.u32 = deviceId; 1067 if (epoll_ctl(mEpollFd, EPOLL_CTL_ADD, fd, &eventItem)) { 1068 LOGE("Could not add device fd to epoll instance. errno=%d", errno); 1069 delete device; 1070 return -1; 1071 } 1072 1073 LOGI("New device: id=%d, fd=%d, path='%s', name='%s', classes=0x%x, " 1074 "configuration='%s', keyLayout='%s', keyCharacterMap='%s', builtinKeyboard=%s", 1075 deviceId, fd, devicePath, device->identifier.name.string(), 1076 device->classes, 1077 device->configurationFile.string(), 1078 device->keyMap.keyLayoutFile.string(), 1079 device->keyMap.keyCharacterMapFile.string(), 1080 toString(mBuiltInKeyboardId == deviceId)); 1081 1082 mDevices.add(deviceId, device); 1083 1084 device->next = mOpeningDevices; 1085 mOpeningDevices = device; 1086 return 0; 1087} 1088 1089void EventHub::loadConfigurationLocked(Device* device) { 1090 device->configurationFile = getInputDeviceConfigurationFilePathByDeviceIdentifier( 1091 device->identifier, INPUT_DEVICE_CONFIGURATION_FILE_TYPE_CONFIGURATION); 1092 if (device->configurationFile.isEmpty()) { 1093 LOGD("No input device configuration file found for device '%s'.", 1094 device->identifier.name.string()); 1095 } else { 1096 status_t status = PropertyMap::load(device->configurationFile, 1097 &device->configuration); 1098 if (status) { 1099 LOGE("Error loading input device configuration file for device '%s'. " 1100 "Using default configuration.", 1101 device->identifier.name.string()); 1102 } 1103 } 1104} 1105 1106status_t EventHub::loadVirtualKeyMapLocked(Device* device) { 1107 // The virtual key map is supplied by the kernel as a system board property file. 1108 String8 path; 1109 path.append("/sys/board_properties/virtualkeys."); 1110 path.append(device->identifier.name); 1111 if (access(path.string(), R_OK)) { 1112 return NAME_NOT_FOUND; 1113 } 1114 return VirtualKeyMap::load(path, &device->virtualKeyMap); 1115} 1116 1117status_t EventHub::loadKeyMapLocked(Device* device) { 1118 return device->keyMap.load(device->identifier, device->configuration); 1119} 1120 1121void EventHub::setKeyboardPropertiesLocked(Device* device, bool builtInKeyboard) { 1122 int32_t id = builtInKeyboard ? 0 : device->id; 1123 android::setKeyboardProperties(id, device->identifier, 1124 device->keyMap.keyLayoutFile, device->keyMap.keyCharacterMapFile); 1125} 1126 1127void EventHub::clearKeyboardPropertiesLocked(Device* device, bool builtInKeyboard) { 1128 int32_t id = builtInKeyboard ? 0 : device->id; 1129 android::clearKeyboardProperties(id); 1130} 1131 1132bool EventHub::isExternalDeviceLocked(Device* device) { 1133 if (device->configuration) { 1134 bool value; 1135 if (device->configuration->tryGetProperty(String8("device.internal"), value) 1136 && value) { 1137 return false; 1138 } 1139 } 1140 return device->identifier.bus == BUS_USB || device->identifier.bus == BUS_BLUETOOTH; 1141} 1142 1143bool EventHub::hasKeycodeLocked(Device* device, int keycode) const { 1144 if (!device->keyMap.haveKeyLayout() || !device->keyBitmask) { 1145 return false; 1146 } 1147 1148 Vector<int32_t> scanCodes; 1149 device->keyMap.keyLayoutMap->findScanCodesForKey(keycode, &scanCodes); 1150 const size_t N = scanCodes.size(); 1151 for (size_t i=0; i<N && i<=KEY_MAX; i++) { 1152 int32_t sc = scanCodes.itemAt(i); 1153 if (sc >= 0 && sc <= KEY_MAX && test_bit(sc, device->keyBitmask)) { 1154 return true; 1155 } 1156 } 1157 1158 return false; 1159} 1160 1161status_t EventHub::closeDeviceByPathLocked(const char *devicePath) { 1162 Device* device = getDeviceByPathLocked(devicePath); 1163 if (device) { 1164 closeDeviceLocked(device); 1165 return 0; 1166 } 1167 LOGV("Remove device: %s not found, device may already have been removed.", devicePath); 1168 return -1; 1169} 1170 1171void EventHub::closeAllDevicesLocked() { 1172 while (mDevices.size() > 0) { 1173 closeDeviceLocked(mDevices.valueAt(mDevices.size() - 1)); 1174 } 1175} 1176 1177void EventHub::closeDeviceLocked(Device* device) { 1178 LOGI("Removed device: path=%s name=%s id=%d fd=%d classes=0x%x\n", 1179 device->path.string(), device->identifier.name.string(), device->id, 1180 device->fd, device->classes); 1181 1182 if (device->id == mBuiltInKeyboardId) { 1183 LOGW("built-in keyboard device %s (id=%d) is closing! the apps will not like this", 1184 device->path.string(), mBuiltInKeyboardId); 1185 mBuiltInKeyboardId = -1; 1186 clearKeyboardPropertiesLocked(device, true); 1187 } 1188 clearKeyboardPropertiesLocked(device, false); 1189 1190 if (epoll_ctl(mEpollFd, EPOLL_CTL_DEL, device->fd, NULL)) { 1191 LOGW("Could not remove device fd from epoll instance. errno=%d", errno); 1192 } 1193 1194 mDevices.removeItem(device->id); 1195 device->close(); 1196 1197 // Unlink for opening devices list if it is present. 1198 Device* pred = NULL; 1199 bool found = false; 1200 for (Device* entry = mOpeningDevices; entry != NULL; ) { 1201 if (entry == device) { 1202 found = true; 1203 break; 1204 } 1205 pred = entry; 1206 entry = entry->next; 1207 } 1208 if (found) { 1209 // Unlink the device from the opening devices list then delete it. 1210 // We don't need to tell the client that the device was closed because 1211 // it does not even know it was opened in the first place. 1212 LOGI("Device %s was immediately closed after opening.", device->path.string()); 1213 if (pred) { 1214 pred->next = device->next; 1215 } else { 1216 mOpeningDevices = device->next; 1217 } 1218 delete device; 1219 } else { 1220 // Link into closing devices list. 1221 // The device will be deleted later after we have informed the client. 1222 device->next = mClosingDevices; 1223 mClosingDevices = device; 1224 } 1225} 1226 1227status_t EventHub::readNotifyLocked() { 1228 int res; 1229 char devname[PATH_MAX]; 1230 char *filename; 1231 char event_buf[512]; 1232 int event_size; 1233 int event_pos = 0; 1234 struct inotify_event *event; 1235 1236 LOGV("EventHub::readNotify nfd: %d\n", mINotifyFd); 1237 res = read(mINotifyFd, event_buf, sizeof(event_buf)); 1238 if(res < (int)sizeof(*event)) { 1239 if(errno == EINTR) 1240 return 0; 1241 LOGW("could not get event, %s\n", strerror(errno)); 1242 return -1; 1243 } 1244 //printf("got %d bytes of event information\n", res); 1245 1246 strcpy(devname, DEVICE_PATH); 1247 filename = devname + strlen(devname); 1248 *filename++ = '/'; 1249 1250 while(res >= (int)sizeof(*event)) { 1251 event = (struct inotify_event *)(event_buf + event_pos); 1252 //printf("%d: %08x \"%s\"\n", event->wd, event->mask, event->len ? event->name : ""); 1253 if(event->len) { 1254 strcpy(filename, event->name); 1255 if(event->mask & IN_CREATE) { 1256 openDeviceLocked(devname); 1257 } else { 1258 closeDeviceByPathLocked(devname); 1259 } 1260 } 1261 event_size = sizeof(*event) + event->len; 1262 res -= event_size; 1263 event_pos += event_size; 1264 } 1265 return 0; 1266} 1267 1268status_t EventHub::scanDirLocked(const char *dirname) 1269{ 1270 char devname[PATH_MAX]; 1271 char *filename; 1272 DIR *dir; 1273 struct dirent *de; 1274 dir = opendir(dirname); 1275 if(dir == NULL) 1276 return -1; 1277 strcpy(devname, dirname); 1278 filename = devname + strlen(devname); 1279 *filename++ = '/'; 1280 while((de = readdir(dir))) { 1281 if(de->d_name[0] == '.' && 1282 (de->d_name[1] == '\0' || 1283 (de->d_name[1] == '.' && de->d_name[2] == '\0'))) 1284 continue; 1285 strcpy(filename, de->d_name); 1286 openDeviceLocked(devname); 1287 } 1288 closedir(dir); 1289 return 0; 1290} 1291 1292void EventHub::requestReopenDevices() { 1293 LOGV("requestReopenDevices() called"); 1294 1295 AutoMutex _l(mLock); 1296 mNeedToReopenDevices = true; 1297} 1298 1299void EventHub::dump(String8& dump) { 1300 dump.append("Event Hub State:\n"); 1301 1302 { // acquire lock 1303 AutoMutex _l(mLock); 1304 1305 dump.appendFormat(INDENT "BuiltInKeyboardId: %d\n", mBuiltInKeyboardId); 1306 1307 dump.append(INDENT "Devices:\n"); 1308 1309 for (size_t i = 0; i < mDevices.size(); i++) { 1310 const Device* device = mDevices.valueAt(i); 1311 if (mBuiltInKeyboardId == device->id) { 1312 dump.appendFormat(INDENT2 "%d: %s (aka device 0 - built-in keyboard)\n", 1313 device->id, device->identifier.name.string()); 1314 } else { 1315 dump.appendFormat(INDENT2 "%d: %s\n", device->id, 1316 device->identifier.name.string()); 1317 } 1318 dump.appendFormat(INDENT3 "Classes: 0x%08x\n", device->classes); 1319 dump.appendFormat(INDENT3 "Path: %s\n", device->path.string()); 1320 dump.appendFormat(INDENT3 "Location: %s\n", device->identifier.location.string()); 1321 dump.appendFormat(INDENT3 "UniqueId: %s\n", device->identifier.uniqueId.string()); 1322 dump.appendFormat(INDENT3 "Identifier: bus=0x%04x, vendor=0x%04x, " 1323 "product=0x%04x, version=0x%04x\n", 1324 device->identifier.bus, device->identifier.vendor, 1325 device->identifier.product, device->identifier.version); 1326 dump.appendFormat(INDENT3 "KeyLayoutFile: %s\n", 1327 device->keyMap.keyLayoutFile.string()); 1328 dump.appendFormat(INDENT3 "KeyCharacterMapFile: %s\n", 1329 device->keyMap.keyCharacterMapFile.string()); 1330 dump.appendFormat(INDENT3 "ConfigurationFile: %s\n", 1331 device->configurationFile.string()); 1332 } 1333 } // release lock 1334} 1335 1336}; // namespace android 1337