EventHub.cpp revision e22afbedc1a71905d112d8cf78ca8c2a27e371fe
1/* 2 * Copyright (C) 2005 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#define LOG_TAG "EventHub" 18 19// #define LOG_NDEBUG 0 20 21#include "EventHub.h" 22 23#include <hardware_legacy/power.h> 24 25#include <cutils/properties.h> 26#include <utils/Log.h> 27#include <utils/Timers.h> 28#include <utils/threads.h> 29#include <utils/Errors.h> 30 31#include <stdlib.h> 32#include <stdio.h> 33#include <unistd.h> 34#include <fcntl.h> 35#include <memory.h> 36#include <errno.h> 37#include <assert.h> 38 39#include <ui/KeyLayoutMap.h> 40#include <ui/KeyCharacterMap.h> 41#include <ui/VirtualKeyMap.h> 42 43#include <string.h> 44#include <stdint.h> 45#include <dirent.h> 46 47#include <sys/inotify.h> 48#include <sys/epoll.h> 49#include <sys/ioctl.h> 50#include <sys/limits.h> 51 52/* this macro is used to tell if "bit" is set in "array" 53 * it selects a byte from the array, and does a boolean AND 54 * operation with a byte that only has the relevant bit set. 55 * eg. to check for the 12th bit, we do (array[1] & 1<<4) 56 */ 57#define test_bit(bit, array) (array[bit/8] & (1<<(bit%8))) 58 59/* this macro computes the number of bytes needed to represent a bit array of the specified size */ 60#define sizeof_bit_array(bits) ((bits + 7) / 8) 61 62#define INDENT " " 63#define INDENT2 " " 64#define INDENT3 " " 65 66namespace android { 67 68static const char *WAKE_LOCK_ID = "KeyEvents"; 69static const char *DEVICE_PATH = "/dev/input"; 70 71/* return the larger integer */ 72static inline int max(int v1, int v2) 73{ 74 return (v1 > v2) ? v1 : v2; 75} 76 77static inline const char* toString(bool value) { 78 return value ? "true" : "false"; 79} 80 81// --- Global Functions --- 82 83uint32_t getAbsAxisUsage(int32_t axis, uint32_t deviceClasses) { 84 // Touch devices get dibs on touch-related axes. 85 if (deviceClasses & INPUT_DEVICE_CLASS_TOUCH) { 86 switch (axis) { 87 case ABS_X: 88 case ABS_Y: 89 case ABS_PRESSURE: 90 case ABS_TOOL_WIDTH: 91 case ABS_DISTANCE: 92 case ABS_TILT_X: 93 case ABS_TILT_Y: 94 case ABS_MT_SLOT: 95 case ABS_MT_TOUCH_MAJOR: 96 case ABS_MT_TOUCH_MINOR: 97 case ABS_MT_WIDTH_MAJOR: 98 case ABS_MT_WIDTH_MINOR: 99 case ABS_MT_ORIENTATION: 100 case ABS_MT_POSITION_X: 101 case ABS_MT_POSITION_Y: 102 case ABS_MT_TOOL_TYPE: 103 case ABS_MT_BLOB_ID: 104 case ABS_MT_TRACKING_ID: 105 case ABS_MT_PRESSURE: 106 case ABS_MT_DISTANCE: 107 return INPUT_DEVICE_CLASS_TOUCH; 108 } 109 } 110 111 // Joystick devices get the rest. 112 return deviceClasses & INPUT_DEVICE_CLASS_JOYSTICK; 113} 114 115// --- EventHub::Device --- 116 117EventHub::Device::Device(int fd, int32_t id, const String8& path, 118 const InputDeviceIdentifier& identifier) : 119 next(NULL), 120 fd(fd), id(id), path(path), identifier(identifier), 121 classes(0), configuration(NULL), virtualKeyMap(NULL) { 122 memset(keyBitmask, 0, sizeof(keyBitmask)); 123 memset(absBitmask, 0, sizeof(absBitmask)); 124 memset(relBitmask, 0, sizeof(relBitmask)); 125 memset(swBitmask, 0, sizeof(swBitmask)); 126 memset(ledBitmask, 0, sizeof(ledBitmask)); 127 memset(propBitmask, 0, sizeof(propBitmask)); 128} 129 130EventHub::Device::~Device() { 131 close(); 132 delete configuration; 133 delete virtualKeyMap; 134} 135 136void EventHub::Device::close() { 137 if (fd >= 0) { 138 ::close(fd); 139 fd = -1; 140 } 141} 142 143 144// --- EventHub --- 145 146const uint32_t EventHub::EPOLL_ID_INOTIFY; 147const uint32_t EventHub::EPOLL_ID_WAKE; 148const int EventHub::EPOLL_SIZE_HINT; 149const int EventHub::EPOLL_MAX_EVENTS; 150 151EventHub::EventHub(void) : 152 mBuiltInKeyboardId(-1), mNextDeviceId(1), 153 mOpeningDevices(0), mClosingDevices(0), 154 mNeedToSendFinishedDeviceScan(false), 155 mNeedToReopenDevices(false), mNeedToScanDevices(true), 156 mPendingEventCount(0), mPendingEventIndex(0), mPendingINotify(false) { 157 acquire_wake_lock(PARTIAL_WAKE_LOCK, WAKE_LOCK_ID); 158 159 mEpollFd = epoll_create(EPOLL_SIZE_HINT); 160 LOG_ALWAYS_FATAL_IF(mEpollFd < 0, "Could not create epoll instance. errno=%d", errno); 161 162 mINotifyFd = inotify_init(); 163 int result = inotify_add_watch(mINotifyFd, DEVICE_PATH, IN_DELETE | IN_CREATE); 164 LOG_ALWAYS_FATAL_IF(result < 0, "Could not register INotify for %s. errno=%d", 165 DEVICE_PATH, errno); 166 167 struct epoll_event eventItem; 168 memset(&eventItem, 0, sizeof(eventItem)); 169 eventItem.events = EPOLLIN; 170 eventItem.data.u32 = EPOLL_ID_INOTIFY; 171 result = epoll_ctl(mEpollFd, EPOLL_CTL_ADD, mINotifyFd, &eventItem); 172 LOG_ALWAYS_FATAL_IF(result != 0, "Could not add INotify to epoll instance. errno=%d", errno); 173 174 int wakeFds[2]; 175 result = pipe(wakeFds); 176 LOG_ALWAYS_FATAL_IF(result != 0, "Could not create wake pipe. errno=%d", errno); 177 178 mWakeReadPipeFd = wakeFds[0]; 179 mWakeWritePipeFd = wakeFds[1]; 180 181 result = fcntl(mWakeReadPipeFd, F_SETFL, O_NONBLOCK); 182 LOG_ALWAYS_FATAL_IF(result != 0, "Could not make wake read pipe non-blocking. errno=%d", 183 errno); 184 185 result = fcntl(mWakeWritePipeFd, F_SETFL, O_NONBLOCK); 186 LOG_ALWAYS_FATAL_IF(result != 0, "Could not make wake write pipe non-blocking. errno=%d", 187 errno); 188 189 eventItem.data.u32 = EPOLL_ID_WAKE; 190 result = epoll_ctl(mEpollFd, EPOLL_CTL_ADD, mWakeReadPipeFd, &eventItem); 191 LOG_ALWAYS_FATAL_IF(result != 0, "Could not add wake read pipe to epoll instance. errno=%d", 192 errno); 193} 194 195EventHub::~EventHub(void) { 196 closeAllDevicesLocked(); 197 198 while (mClosingDevices) { 199 Device* device = mClosingDevices; 200 mClosingDevices = device->next; 201 delete device; 202 } 203 204 ::close(mEpollFd); 205 ::close(mINotifyFd); 206 ::close(mWakeReadPipeFd); 207 ::close(mWakeWritePipeFd); 208 209 release_wake_lock(WAKE_LOCK_ID); 210} 211 212String8 EventHub::getDeviceName(int32_t deviceId) const { 213 AutoMutex _l(mLock); 214 Device* device = getDeviceLocked(deviceId); 215 if (device == NULL) return String8(); 216 return device->identifier.name; 217} 218 219uint32_t EventHub::getDeviceClasses(int32_t deviceId) const { 220 AutoMutex _l(mLock); 221 Device* device = getDeviceLocked(deviceId); 222 if (device == NULL) return 0; 223 return device->classes; 224} 225 226void EventHub::getConfiguration(int32_t deviceId, PropertyMap* outConfiguration) const { 227 AutoMutex _l(mLock); 228 Device* device = getDeviceLocked(deviceId); 229 if (device && device->configuration) { 230 *outConfiguration = *device->configuration; 231 } else { 232 outConfiguration->clear(); 233 } 234} 235 236status_t EventHub::getAbsoluteAxisInfo(int32_t deviceId, int axis, 237 RawAbsoluteAxisInfo* outAxisInfo) const { 238 outAxisInfo->clear(); 239 240 if (axis >= 0 && axis <= ABS_MAX) { 241 AutoMutex _l(mLock); 242 243 Device* device = getDeviceLocked(deviceId); 244 if (device && test_bit(axis, device->absBitmask)) { 245 struct input_absinfo info; 246 if(ioctl(device->fd, EVIOCGABS(axis), &info)) { 247 ALOGW("Error reading absolute controller %d for device %s fd %d, errno=%d", 248 axis, device->identifier.name.string(), device->fd, errno); 249 return -errno; 250 } 251 252 if (info.minimum != info.maximum) { 253 outAxisInfo->valid = true; 254 outAxisInfo->minValue = info.minimum; 255 outAxisInfo->maxValue = info.maximum; 256 outAxisInfo->flat = info.flat; 257 outAxisInfo->fuzz = info.fuzz; 258 outAxisInfo->resolution = info.resolution; 259 } 260 return OK; 261 } 262 } 263 return -1; 264} 265 266bool EventHub::hasRelativeAxis(int32_t deviceId, int axis) const { 267 if (axis >= 0 && axis <= REL_MAX) { 268 AutoMutex _l(mLock); 269 270 Device* device = getDeviceLocked(deviceId); 271 if (device) { 272 return test_bit(axis, device->relBitmask); 273 } 274 } 275 return false; 276} 277 278bool EventHub::hasInputProperty(int32_t deviceId, int property) const { 279 if (property >= 0 && property <= INPUT_PROP_MAX) { 280 AutoMutex _l(mLock); 281 282 Device* device = getDeviceLocked(deviceId); 283 if (device) { 284 return test_bit(property, device->propBitmask); 285 } 286 } 287 return false; 288} 289 290int32_t EventHub::getScanCodeState(int32_t deviceId, int32_t scanCode) const { 291 if (scanCode >= 0 && scanCode <= KEY_MAX) { 292 AutoMutex _l(mLock); 293 294 Device* device = getDeviceLocked(deviceId); 295 if (device && test_bit(scanCode, device->keyBitmask)) { 296 uint8_t keyState[sizeof_bit_array(KEY_MAX + 1)]; 297 memset(keyState, 0, sizeof(keyState)); 298 if (ioctl(device->fd, EVIOCGKEY(sizeof(keyState)), keyState) >= 0) { 299 return test_bit(scanCode, keyState) ? AKEY_STATE_DOWN : AKEY_STATE_UP; 300 } 301 } 302 } 303 return AKEY_STATE_UNKNOWN; 304} 305 306int32_t EventHub::getKeyCodeState(int32_t deviceId, int32_t keyCode) const { 307 AutoMutex _l(mLock); 308 309 Device* device = getDeviceLocked(deviceId); 310 if (device && device->keyMap.haveKeyLayout()) { 311 Vector<int32_t> scanCodes; 312 device->keyMap.keyLayoutMap->findScanCodesForKey(keyCode, &scanCodes); 313 if (scanCodes.size() != 0) { 314 uint8_t keyState[sizeof_bit_array(KEY_MAX + 1)]; 315 memset(keyState, 0, sizeof(keyState)); 316 if (ioctl(device->fd, EVIOCGKEY(sizeof(keyState)), keyState) >= 0) { 317 for (size_t i = 0; i < scanCodes.size(); i++) { 318 int32_t sc = scanCodes.itemAt(i); 319 if (sc >= 0 && sc <= KEY_MAX && test_bit(sc, keyState)) { 320 return AKEY_STATE_DOWN; 321 } 322 } 323 return AKEY_STATE_UP; 324 } 325 } 326 } 327 return AKEY_STATE_UNKNOWN; 328} 329 330int32_t EventHub::getSwitchState(int32_t deviceId, int32_t sw) const { 331 if (sw >= 0 && sw <= SW_MAX) { 332 AutoMutex _l(mLock); 333 334 Device* device = getDeviceLocked(deviceId); 335 if (device && test_bit(sw, device->swBitmask)) { 336 uint8_t swState[sizeof_bit_array(SW_MAX + 1)]; 337 memset(swState, 0, sizeof(swState)); 338 if (ioctl(device->fd, EVIOCGSW(sizeof(swState)), swState) >= 0) { 339 return test_bit(sw, swState) ? AKEY_STATE_DOWN : AKEY_STATE_UP; 340 } 341 } 342 } 343 return AKEY_STATE_UNKNOWN; 344} 345 346status_t EventHub::getAbsoluteAxisValue(int32_t deviceId, int32_t axis, int32_t* outValue) const { 347 *outValue = 0; 348 349 if (axis >= 0 && axis <= ABS_MAX) { 350 AutoMutex _l(mLock); 351 352 Device* device = getDeviceLocked(deviceId); 353 if (device && test_bit(axis, device->absBitmask)) { 354 struct input_absinfo info; 355 if(ioctl(device->fd, EVIOCGABS(axis), &info)) { 356 ALOGW("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 } 365 return -1; 366} 367 368bool EventHub::markSupportedKeyCodes(int32_t deviceId, size_t numCodes, 369 const int32_t* keyCodes, uint8_t* outFlags) const { 370 AutoMutex _l(mLock); 371 372 Device* device = getDeviceLocked(deviceId); 373 if (device && device->keyMap.haveKeyLayout()) { 374 Vector<int32_t> scanCodes; 375 for (size_t codeIndex = 0; codeIndex < numCodes; codeIndex++) { 376 scanCodes.clear(); 377 378 status_t err = device->keyMap.keyLayoutMap->findScanCodesForKey( 379 keyCodes[codeIndex], &scanCodes); 380 if (! err) { 381 // check the possible scan codes identified by the layout map against the 382 // map of codes actually emitted by the driver 383 for (size_t sc = 0; sc < scanCodes.size(); sc++) { 384 if (test_bit(scanCodes[sc], device->keyBitmask)) { 385 outFlags[codeIndex] = 1; 386 break; 387 } 388 } 389 } 390 } 391 return true; 392 } 393 return false; 394} 395 396status_t EventHub::mapKey(int32_t deviceId, int scancode, 397 int32_t* outKeycode, uint32_t* outFlags) const 398{ 399 AutoMutex _l(mLock); 400 Device* device = getDeviceLocked(deviceId); 401 402 if (device && device->keyMap.haveKeyLayout()) { 403 status_t err = device->keyMap.keyLayoutMap->mapKey(scancode, outKeycode, outFlags); 404 if (err == NO_ERROR) { 405 return NO_ERROR; 406 } 407 } 408 409 if (mBuiltInKeyboardId != -1) { 410 device = getDeviceLocked(mBuiltInKeyboardId); 411 412 if (device && device->keyMap.haveKeyLayout()) { 413 status_t err = device->keyMap.keyLayoutMap->mapKey(scancode, outKeycode, outFlags); 414 if (err == NO_ERROR) { 415 return NO_ERROR; 416 } 417 } 418 } 419 420 *outKeycode = 0; 421 *outFlags = 0; 422 return NAME_NOT_FOUND; 423} 424 425status_t EventHub::mapAxis(int32_t deviceId, int scancode, AxisInfo* outAxisInfo) const 426{ 427 AutoMutex _l(mLock); 428 Device* device = getDeviceLocked(deviceId); 429 430 if (device && device->keyMap.haveKeyLayout()) { 431 status_t err = device->keyMap.keyLayoutMap->mapAxis(scancode, outAxisInfo); 432 if (err == NO_ERROR) { 433 return NO_ERROR; 434 } 435 } 436 437 if (mBuiltInKeyboardId != -1) { 438 device = getDeviceLocked(mBuiltInKeyboardId); 439 440 if (device && device->keyMap.haveKeyLayout()) { 441 status_t err = device->keyMap.keyLayoutMap->mapAxis(scancode, outAxisInfo); 442 if (err == NO_ERROR) { 443 return NO_ERROR; 444 } 445 } 446 } 447 448 return NAME_NOT_FOUND; 449} 450 451void EventHub::setExcludedDevices(const Vector<String8>& devices) { 452 AutoMutex _l(mLock); 453 454 mExcludedDevices = devices; 455} 456 457bool EventHub::hasScanCode(int32_t deviceId, int32_t scanCode) const { 458 AutoMutex _l(mLock); 459 Device* device = getDeviceLocked(deviceId); 460 if (device && scanCode >= 0 && scanCode <= KEY_MAX) { 461 if (test_bit(scanCode, device->keyBitmask)) { 462 return true; 463 } 464 } 465 return false; 466} 467 468bool EventHub::hasLed(int32_t deviceId, int32_t led) const { 469 AutoMutex _l(mLock); 470 Device* device = getDeviceLocked(deviceId); 471 if (device && led >= 0 && led <= LED_MAX) { 472 if (test_bit(led, device->ledBitmask)) { 473 return true; 474 } 475 } 476 return false; 477} 478 479void EventHub::setLedState(int32_t deviceId, int32_t led, bool on) { 480 AutoMutex _l(mLock); 481 Device* device = getDeviceLocked(deviceId); 482 if (device && led >= 0 && led <= LED_MAX) { 483 struct input_event ev; 484 ev.time.tv_sec = 0; 485 ev.time.tv_usec = 0; 486 ev.type = EV_LED; 487 ev.code = led; 488 ev.value = on ? 1 : 0; 489 490 ssize_t nWrite; 491 do { 492 nWrite = write(device->fd, &ev, sizeof(struct input_event)); 493 } while (nWrite == -1 && errno == EINTR); 494 } 495} 496 497void EventHub::getVirtualKeyDefinitions(int32_t deviceId, 498 Vector<VirtualKeyDefinition>& outVirtualKeys) const { 499 outVirtualKeys.clear(); 500 501 AutoMutex _l(mLock); 502 Device* device = getDeviceLocked(deviceId); 503 if (device && device->virtualKeyMap) { 504 outVirtualKeys.appendVector(device->virtualKeyMap->getVirtualKeys()); 505 } 506} 507 508String8 EventHub::getKeyCharacterMapFile(int32_t deviceId) const { 509 AutoMutex _l(mLock); 510 Device* device = getDeviceLocked(deviceId); 511 if (device) { 512 return device->keyMap.keyCharacterMapFile; 513 } 514 return String8(); 515} 516 517EventHub::Device* EventHub::getDeviceLocked(int32_t deviceId) const { 518 if (deviceId == 0) { 519 deviceId = mBuiltInKeyboardId; 520 } 521 ssize_t index = mDevices.indexOfKey(deviceId); 522 return index >= 0 ? mDevices.valueAt(index) : NULL; 523} 524 525EventHub::Device* EventHub::getDeviceByPathLocked(const char* devicePath) const { 526 for (size_t i = 0; i < mDevices.size(); i++) { 527 Device* device = mDevices.valueAt(i); 528 if (device->path == devicePath) { 529 return device; 530 } 531 } 532 return NULL; 533} 534 535size_t EventHub::getEvents(int timeoutMillis, RawEvent* buffer, size_t bufferSize) { 536 ALOG_ASSERT(bufferSize >= 1); 537 538 AutoMutex _l(mLock); 539 540 struct input_event readBuffer[bufferSize]; 541 542 RawEvent* event = buffer; 543 size_t capacity = bufferSize; 544 bool awoken = false; 545 for (;;) { 546 nsecs_t now = systemTime(SYSTEM_TIME_MONOTONIC); 547 548 // Reopen input devices if needed. 549 if (mNeedToReopenDevices) { 550 mNeedToReopenDevices = false; 551 552 ALOGI("Reopening all input devices due to a configuration change."); 553 554 closeAllDevicesLocked(); 555 mNeedToScanDevices = true; 556 break; // return to the caller before we actually rescan 557 } 558 559 // Report any devices that had last been added/removed. 560 while (mClosingDevices) { 561 Device* device = mClosingDevices; 562 ALOGV("Reporting device closed: id=%d, name=%s\n", 563 device->id, device->path.string()); 564 mClosingDevices = device->next; 565 event->when = now; 566 event->deviceId = device->id == mBuiltInKeyboardId ? 0 : device->id; 567 event->type = DEVICE_REMOVED; 568 event += 1; 569 delete device; 570 mNeedToSendFinishedDeviceScan = true; 571 if (--capacity == 0) { 572 break; 573 } 574 } 575 576 if (mNeedToScanDevices) { 577 mNeedToScanDevices = false; 578 scanDevicesLocked(); 579 mNeedToSendFinishedDeviceScan = true; 580 } 581 582 while (mOpeningDevices != NULL) { 583 Device* device = mOpeningDevices; 584 ALOGV("Reporting device opened: id=%d, name=%s\n", 585 device->id, device->path.string()); 586 mOpeningDevices = device->next; 587 event->when = now; 588 event->deviceId = device->id == mBuiltInKeyboardId ? 0 : device->id; 589 event->type = DEVICE_ADDED; 590 event += 1; 591 mNeedToSendFinishedDeviceScan = true; 592 if (--capacity == 0) { 593 break; 594 } 595 } 596 597 if (mNeedToSendFinishedDeviceScan) { 598 mNeedToSendFinishedDeviceScan = false; 599 event->when = now; 600 event->type = FINISHED_DEVICE_SCAN; 601 event += 1; 602 if (--capacity == 0) { 603 break; 604 } 605 } 606 607 // Grab the next input event. 608 bool deviceChanged = false; 609 while (mPendingEventIndex < mPendingEventCount) { 610 const struct epoll_event& eventItem = mPendingEventItems[mPendingEventIndex++]; 611 if (eventItem.data.u32 == EPOLL_ID_INOTIFY) { 612 if (eventItem.events & EPOLLIN) { 613 mPendingINotify = true; 614 } else { 615 ALOGW("Received unexpected epoll event 0x%08x for INotify.", eventItem.events); 616 } 617 continue; 618 } 619 620 if (eventItem.data.u32 == EPOLL_ID_WAKE) { 621 if (eventItem.events & EPOLLIN) { 622 ALOGV("awoken after wake()"); 623 awoken = true; 624 char buffer[16]; 625 ssize_t nRead; 626 do { 627 nRead = read(mWakeReadPipeFd, buffer, sizeof(buffer)); 628 } while ((nRead == -1 && errno == EINTR) || nRead == sizeof(buffer)); 629 } else { 630 ALOGW("Received unexpected epoll event 0x%08x for wake read pipe.", 631 eventItem.events); 632 } 633 continue; 634 } 635 636 ssize_t deviceIndex = mDevices.indexOfKey(eventItem.data.u32); 637 if (deviceIndex < 0) { 638 ALOGW("Received unexpected epoll event 0x%08x for unknown device id %d.", 639 eventItem.events, eventItem.data.u32); 640 continue; 641 } 642 643 Device* device = mDevices.valueAt(deviceIndex); 644 if (eventItem.events & EPOLLIN) { 645 int32_t readSize = read(device->fd, readBuffer, 646 sizeof(struct input_event) * capacity); 647 if (readSize == 0 || (readSize < 0 && errno == ENODEV)) { 648 // Device was removed before INotify noticed. 649 ALOGW("could not get event, removed? (fd: %d size: %d bufferSize: %d " 650 "capacity: %d errno: %d)\n", 651 device->fd, readSize, bufferSize, capacity, errno); 652 deviceChanged = true; 653 closeDeviceLocked(device); 654 } else if (readSize < 0) { 655 if (errno != EAGAIN && errno != EINTR) { 656 ALOGW("could not get event (errno=%d)", errno); 657 } 658 } else if ((readSize % sizeof(struct input_event)) != 0) { 659 ALOGE("could not get event (wrong size: %d)", readSize); 660 } else { 661 int32_t deviceId = device->id == mBuiltInKeyboardId ? 0 : device->id; 662 663 size_t count = size_t(readSize) / sizeof(struct input_event); 664 for (size_t i = 0; i < count; i++) { 665 const struct input_event& iev = readBuffer[i]; 666 ALOGV("%s got: t0=%d, t1=%d, type=%d, code=%d, value=%d", 667 device->path.string(), 668 (int) iev.time.tv_sec, (int) iev.time.tv_usec, 669 iev.type, iev.code, iev.value); 670 671#ifdef HAVE_POSIX_CLOCKS 672 // Use the time specified in the event instead of the current time 673 // so that downstream code can get more accurate estimates of 674 // event dispatch latency from the time the event is enqueued onto 675 // the evdev client buffer. 676 // 677 // The event's timestamp fortuitously uses the same monotonic clock 678 // time base as the rest of Android. The kernel event device driver 679 // (drivers/input/evdev.c) obtains timestamps using ktime_get_ts(). 680 // The systemTime(SYSTEM_TIME_MONOTONIC) function we use everywhere 681 // calls clock_gettime(CLOCK_MONOTONIC) which is implemented as a 682 // system call that also queries ktime_get_ts(). 683 event->when = nsecs_t(iev.time.tv_sec) * 1000000000LL 684 + nsecs_t(iev.time.tv_usec) * 1000LL; 685 ALOGV("event time %lld, now %lld", event->when, now); 686#else 687 event->when = now; 688#endif 689 event->deviceId = deviceId; 690 event->type = iev.type; 691 event->scanCode = iev.code; 692 event->value = iev.value; 693 event->keyCode = AKEYCODE_UNKNOWN; 694 event->flags = 0; 695 if (iev.type == EV_KEY && device->keyMap.haveKeyLayout()) { 696 status_t err = device->keyMap.keyLayoutMap->mapKey(iev.code, 697 &event->keyCode, &event->flags); 698 ALOGV("iev.code=%d keyCode=%d flags=0x%08x err=%d\n", 699 iev.code, event->keyCode, event->flags, err); 700 } 701 event += 1; 702 } 703 capacity -= count; 704 if (capacity == 0) { 705 // The result buffer is full. Reset the pending event index 706 // so we will try to read the device again on the next iteration. 707 mPendingEventIndex -= 1; 708 break; 709 } 710 } 711 } else { 712 ALOGW("Received unexpected epoll event 0x%08x for device %s.", 713 eventItem.events, device->identifier.name.string()); 714 } 715 } 716 717 // readNotify() will modify the list of devices so this must be done after 718 // processing all other events to ensure that we read all remaining events 719 // before closing the devices. 720 if (mPendingINotify && mPendingEventIndex >= mPendingEventCount) { 721 mPendingINotify = false; 722 readNotifyLocked(); 723 deviceChanged = true; 724 } 725 726 // Report added or removed devices immediately. 727 if (deviceChanged) { 728 continue; 729 } 730 731 // Return now if we have collected any events or if we were explicitly awoken. 732 if (event != buffer || awoken) { 733 break; 734 } 735 736 // Poll for events. Mind the wake lock dance! 737 // We hold a wake lock at all times except during epoll_wait(). This works due to some 738 // subtle choreography. When a device driver has pending (unread) events, it acquires 739 // a kernel wake lock. However, once the last pending event has been read, the device 740 // driver will release the kernel wake lock. To prevent the system from going to sleep 741 // when this happens, the EventHub holds onto its own user wake lock while the client 742 // is processing events. Thus the system can only sleep if there are no events 743 // pending or currently being processed. 744 // 745 // The timeout is advisory only. If the device is asleep, it will not wake just to 746 // service the timeout. 747 mPendingEventIndex = 0; 748 749 mLock.unlock(); // release lock before poll, must be before release_wake_lock 750 release_wake_lock(WAKE_LOCK_ID); 751 752 int pollResult = epoll_wait(mEpollFd, mPendingEventItems, EPOLL_MAX_EVENTS, timeoutMillis); 753 754 acquire_wake_lock(PARTIAL_WAKE_LOCK, WAKE_LOCK_ID); 755 mLock.lock(); // reacquire lock after poll, must be after acquire_wake_lock 756 757 if (pollResult == 0) { 758 // Timed out. 759 mPendingEventCount = 0; 760 break; 761 } 762 763 if (pollResult < 0) { 764 // An error occurred. 765 mPendingEventCount = 0; 766 767 // Sleep after errors to avoid locking up the system. 768 // Hopefully the error is transient. 769 if (errno != EINTR) { 770 ALOGW("poll failed (errno=%d)\n", errno); 771 usleep(100000); 772 } 773 } else { 774 // Some events occurred. 775 mPendingEventCount = size_t(pollResult); 776 } 777 } 778 779 // All done, return the number of events we read. 780 return event - buffer; 781} 782 783void EventHub::wake() { 784 ALOGV("wake() called"); 785 786 ssize_t nWrite; 787 do { 788 nWrite = write(mWakeWritePipeFd, "W", 1); 789 } while (nWrite == -1 && errno == EINTR); 790 791 if (nWrite != 1 && errno != EAGAIN) { 792 ALOGW("Could not write wake signal, errno=%d", errno); 793 } 794} 795 796void EventHub::scanDevicesLocked() { 797 status_t res = scanDirLocked(DEVICE_PATH); 798 if(res < 0) { 799 ALOGE("scan dir failed for %s\n", DEVICE_PATH); 800 } 801} 802 803// ---------------------------------------------------------------------------- 804 805static bool containsNonZeroByte(const uint8_t* array, uint32_t startIndex, uint32_t endIndex) { 806 const uint8_t* end = array + endIndex; 807 array += startIndex; 808 while (array != end) { 809 if (*(array++) != 0) { 810 return true; 811 } 812 } 813 return false; 814} 815 816static const int32_t GAMEPAD_KEYCODES[] = { 817 AKEYCODE_BUTTON_A, AKEYCODE_BUTTON_B, AKEYCODE_BUTTON_C, 818 AKEYCODE_BUTTON_X, AKEYCODE_BUTTON_Y, AKEYCODE_BUTTON_Z, 819 AKEYCODE_BUTTON_L1, AKEYCODE_BUTTON_R1, 820 AKEYCODE_BUTTON_L2, AKEYCODE_BUTTON_R2, 821 AKEYCODE_BUTTON_THUMBL, AKEYCODE_BUTTON_THUMBR, 822 AKEYCODE_BUTTON_START, AKEYCODE_BUTTON_SELECT, AKEYCODE_BUTTON_MODE, 823 AKEYCODE_BUTTON_1, AKEYCODE_BUTTON_2, AKEYCODE_BUTTON_3, AKEYCODE_BUTTON_4, 824 AKEYCODE_BUTTON_5, AKEYCODE_BUTTON_6, AKEYCODE_BUTTON_7, AKEYCODE_BUTTON_8, 825 AKEYCODE_BUTTON_9, AKEYCODE_BUTTON_10, AKEYCODE_BUTTON_11, AKEYCODE_BUTTON_12, 826 AKEYCODE_BUTTON_13, AKEYCODE_BUTTON_14, AKEYCODE_BUTTON_15, AKEYCODE_BUTTON_16, 827}; 828 829status_t EventHub::openDeviceLocked(const char *devicePath) { 830 char buffer[80]; 831 832 ALOGV("Opening device: %s", devicePath); 833 834 int fd = open(devicePath, O_RDWR); 835 if(fd < 0) { 836 ALOGE("could not open %s, %s\n", devicePath, strerror(errno)); 837 return -1; 838 } 839 840 InputDeviceIdentifier identifier; 841 842 // Get device name. 843 if(ioctl(fd, EVIOCGNAME(sizeof(buffer) - 1), &buffer) < 1) { 844 //fprintf(stderr, "could not get device name for %s, %s\n", devicePath, strerror(errno)); 845 } else { 846 buffer[sizeof(buffer) - 1] = '\0'; 847 identifier.name.setTo(buffer); 848 } 849 850 // Check to see if the device is on our excluded list 851 for (size_t i = 0; i < mExcludedDevices.size(); i++) { 852 const String8& item = mExcludedDevices.itemAt(i); 853 if (identifier.name == item) { 854 ALOGI("ignoring event id %s driver %s\n", devicePath, item.string()); 855 close(fd); 856 return -1; 857 } 858 } 859 860 // Get device driver version. 861 int driverVersion; 862 if(ioctl(fd, EVIOCGVERSION, &driverVersion)) { 863 ALOGE("could not get driver version for %s, %s\n", devicePath, strerror(errno)); 864 close(fd); 865 return -1; 866 } 867 868 // Get device identifier. 869 struct input_id inputId; 870 if(ioctl(fd, EVIOCGID, &inputId)) { 871 ALOGE("could not get device input id for %s, %s\n", devicePath, strerror(errno)); 872 close(fd); 873 return -1; 874 } 875 identifier.bus = inputId.bustype; 876 identifier.product = inputId.product; 877 identifier.vendor = inputId.vendor; 878 identifier.version = inputId.version; 879 880 // Get device physical location. 881 if(ioctl(fd, EVIOCGPHYS(sizeof(buffer) - 1), &buffer) < 1) { 882 //fprintf(stderr, "could not get location for %s, %s\n", devicePath, strerror(errno)); 883 } else { 884 buffer[sizeof(buffer) - 1] = '\0'; 885 identifier.location.setTo(buffer); 886 } 887 888 // Get device unique id. 889 if(ioctl(fd, EVIOCGUNIQ(sizeof(buffer) - 1), &buffer) < 1) { 890 //fprintf(stderr, "could not get idstring for %s, %s\n", devicePath, strerror(errno)); 891 } else { 892 buffer[sizeof(buffer) - 1] = '\0'; 893 identifier.uniqueId.setTo(buffer); 894 } 895 896 // Make file descriptor non-blocking for use with poll(). 897 if (fcntl(fd, F_SETFL, O_NONBLOCK)) { 898 ALOGE("Error %d making device file descriptor non-blocking.", errno); 899 close(fd); 900 return -1; 901 } 902 903 // Allocate device. (The device object takes ownership of the fd at this point.) 904 int32_t deviceId = mNextDeviceId++; 905 Device* device = new Device(fd, deviceId, String8(devicePath), identifier); 906 907#if 0 908 ALOGI("add device %d: %s\n", deviceId, devicePath); 909 ALOGI(" bus: %04x\n" 910 " vendor %04x\n" 911 " product %04x\n" 912 " version %04x\n", 913 identifier.bus, identifier.vendor, identifier.product, identifier.version); 914 ALOGI(" name: \"%s\"\n", identifier.name.string()); 915 ALOGI(" location: \"%s\"\n", identifier.location.string()); 916 ALOGI(" unique id: \"%s\"\n", identifier.uniqueId.string()); 917 ALOGI(" driver: v%d.%d.%d\n", 918 driverVersion >> 16, (driverVersion >> 8) & 0xff, driverVersion & 0xff); 919#endif 920 921 // Load the configuration file for the device. 922 loadConfigurationLocked(device); 923 924 // Figure out the kinds of events the device reports. 925 ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(device->keyBitmask)), device->keyBitmask); 926 ioctl(fd, EVIOCGBIT(EV_ABS, sizeof(device->absBitmask)), device->absBitmask); 927 ioctl(fd, EVIOCGBIT(EV_REL, sizeof(device->relBitmask)), device->relBitmask); 928 ioctl(fd, EVIOCGBIT(EV_SW, sizeof(device->swBitmask)), device->swBitmask); 929 ioctl(fd, EVIOCGBIT(EV_LED, sizeof(device->ledBitmask)), device->ledBitmask); 930 ioctl(fd, EVIOCGPROP(sizeof(device->propBitmask)), device->propBitmask); 931 932 // See if this is a keyboard. Ignore everything in the button range except for 933 // joystick and gamepad buttons which are handled like keyboards for the most part. 934 bool haveKeyboardKeys = containsNonZeroByte(device->keyBitmask, 0, sizeof_bit_array(BTN_MISC)) 935 || containsNonZeroByte(device->keyBitmask, sizeof_bit_array(KEY_OK), 936 sizeof_bit_array(KEY_MAX + 1)); 937 bool haveGamepadButtons = containsNonZeroByte(device->keyBitmask, sizeof_bit_array(BTN_MISC), 938 sizeof_bit_array(BTN_MOUSE)) 939 || containsNonZeroByte(device->keyBitmask, sizeof_bit_array(BTN_JOYSTICK), 940 sizeof_bit_array(BTN_DIGI)); 941 if (haveKeyboardKeys || haveGamepadButtons) { 942 device->classes |= INPUT_DEVICE_CLASS_KEYBOARD; 943 } 944 945 // See if this is a cursor device such as a trackball or mouse. 946 if (test_bit(BTN_MOUSE, device->keyBitmask) 947 && test_bit(REL_X, device->relBitmask) 948 && test_bit(REL_Y, device->relBitmask)) { 949 device->classes |= INPUT_DEVICE_CLASS_CURSOR; 950 } 951 952 // See if this is a touch pad. 953 // Is this a new modern multi-touch driver? 954 if (test_bit(ABS_MT_POSITION_X, device->absBitmask) 955 && test_bit(ABS_MT_POSITION_Y, device->absBitmask)) { 956 // Some joysticks such as the PS3 controller report axes that conflict 957 // with the ABS_MT range. Try to confirm that the device really is 958 // a touch screen. 959 if (test_bit(BTN_TOUCH, device->keyBitmask) || !haveGamepadButtons) { 960 device->classes |= INPUT_DEVICE_CLASS_TOUCH | INPUT_DEVICE_CLASS_TOUCH_MT; 961 } 962 // Is this an old style single-touch driver? 963 } else if (test_bit(BTN_TOUCH, device->keyBitmask) 964 && test_bit(ABS_X, device->absBitmask) 965 && test_bit(ABS_Y, device->absBitmask)) { 966 device->classes |= INPUT_DEVICE_CLASS_TOUCH; 967 } 968 969 // See if this device is a joystick. 970 // Assumes that joysticks always have gamepad buttons in order to distinguish them 971 // from other devices such as accelerometers that also have absolute axes. 972 if (haveGamepadButtons) { 973 uint32_t assumedClasses = device->classes | INPUT_DEVICE_CLASS_JOYSTICK; 974 for (int i = 0; i <= ABS_MAX; i++) { 975 if (test_bit(i, device->absBitmask) 976 && (getAbsAxisUsage(i, assumedClasses) & INPUT_DEVICE_CLASS_JOYSTICK)) { 977 device->classes = assumedClasses; 978 break; 979 } 980 } 981 } 982 983 // Check whether this device has switches. 984 for (int i = 0; i <= SW_MAX; i++) { 985 if (test_bit(i, device->swBitmask)) { 986 device->classes |= INPUT_DEVICE_CLASS_SWITCH; 987 break; 988 } 989 } 990 991 // Configure virtual keys. 992 if ((device->classes & INPUT_DEVICE_CLASS_TOUCH)) { 993 // Load the virtual keys for the touch screen, if any. 994 // We do this now so that we can make sure to load the keymap if necessary. 995 status_t status = loadVirtualKeyMapLocked(device); 996 if (!status) { 997 device->classes |= INPUT_DEVICE_CLASS_KEYBOARD; 998 } 999 } 1000 1001 // Load the key map. 1002 // We need to do this for joysticks too because the key layout may specify axes. 1003 status_t keyMapStatus = NAME_NOT_FOUND; 1004 if (device->classes & (INPUT_DEVICE_CLASS_KEYBOARD | INPUT_DEVICE_CLASS_JOYSTICK)) { 1005 // Load the keymap for the device. 1006 keyMapStatus = loadKeyMapLocked(device); 1007 } 1008 1009 // Configure the keyboard, gamepad or virtual keyboard. 1010 if (device->classes & INPUT_DEVICE_CLASS_KEYBOARD) { 1011 // Register the keyboard as a built-in keyboard if it is eligible. 1012 if (!keyMapStatus 1013 && mBuiltInKeyboardId == -1 1014 && isEligibleBuiltInKeyboard(device->identifier, 1015 device->configuration, &device->keyMap)) { 1016 mBuiltInKeyboardId = device->id; 1017 } 1018 1019 // 'Q' key support = cheap test of whether this is an alpha-capable kbd 1020 if (hasKeycodeLocked(device, AKEYCODE_Q)) { 1021 device->classes |= INPUT_DEVICE_CLASS_ALPHAKEY; 1022 } 1023 1024 // See if this device has a DPAD. 1025 if (hasKeycodeLocked(device, AKEYCODE_DPAD_UP) && 1026 hasKeycodeLocked(device, AKEYCODE_DPAD_DOWN) && 1027 hasKeycodeLocked(device, AKEYCODE_DPAD_LEFT) && 1028 hasKeycodeLocked(device, AKEYCODE_DPAD_RIGHT) && 1029 hasKeycodeLocked(device, AKEYCODE_DPAD_CENTER)) { 1030 device->classes |= INPUT_DEVICE_CLASS_DPAD; 1031 } 1032 1033 // See if this device has a gamepad. 1034 for (size_t i = 0; i < sizeof(GAMEPAD_KEYCODES)/sizeof(GAMEPAD_KEYCODES[0]); i++) { 1035 if (hasKeycodeLocked(device, GAMEPAD_KEYCODES[i])) { 1036 device->classes |= INPUT_DEVICE_CLASS_GAMEPAD; 1037 break; 1038 } 1039 } 1040 } 1041 1042 // If the device isn't recognized as something we handle, don't monitor it. 1043 if (device->classes == 0) { 1044 ALOGV("Dropping device: id=%d, path='%s', name='%s'", 1045 deviceId, devicePath, device->identifier.name.string()); 1046 delete device; 1047 return -1; 1048 } 1049 1050 // Determine whether the device is external or internal. 1051 if (isExternalDeviceLocked(device)) { 1052 device->classes |= INPUT_DEVICE_CLASS_EXTERNAL; 1053 } 1054 1055 // Register with epoll. 1056 struct epoll_event eventItem; 1057 memset(&eventItem, 0, sizeof(eventItem)); 1058 eventItem.events = EPOLLIN; 1059 eventItem.data.u32 = deviceId; 1060 if (epoll_ctl(mEpollFd, EPOLL_CTL_ADD, fd, &eventItem)) { 1061 ALOGE("Could not add device fd to epoll instance. errno=%d", errno); 1062 delete device; 1063 return -1; 1064 } 1065 1066 // Enable wake-lock behavior on kernels that support it. 1067 // TODO: Only need this for devices that can really wake the system. 1068 bool usingSuspendBlock = ioctl(fd, EVIOCSSUSPENDBLOCK, 1) == 0; 1069 1070 ALOGI("New device: id=%d, fd=%d, path='%s', name='%s', classes=0x%x, " 1071 "configuration='%s', keyLayout='%s', keyCharacterMap='%s', builtinKeyboard=%s, " 1072 "usingSuspendBlock=%s", 1073 deviceId, fd, devicePath, device->identifier.name.string(), 1074 device->classes, 1075 device->configurationFile.string(), 1076 device->keyMap.keyLayoutFile.string(), 1077 device->keyMap.keyCharacterMapFile.string(), 1078 toString(mBuiltInKeyboardId == deviceId), 1079 toString(usingSuspendBlock)); 1080 1081 mDevices.add(deviceId, device); 1082 1083 device->next = mOpeningDevices; 1084 mOpeningDevices = device; 1085 return 0; 1086} 1087 1088void EventHub::loadConfigurationLocked(Device* device) { 1089 device->configurationFile = getInputDeviceConfigurationFilePathByDeviceIdentifier( 1090 device->identifier, INPUT_DEVICE_CONFIGURATION_FILE_TYPE_CONFIGURATION); 1091 if (device->configurationFile.isEmpty()) { 1092 ALOGD("No input device configuration file found for device '%s'.", 1093 device->identifier.name.string()); 1094 } else { 1095 status_t status = PropertyMap::load(device->configurationFile, 1096 &device->configuration); 1097 if (status) { 1098 ALOGE("Error loading input device configuration file for device '%s'. " 1099 "Using default configuration.", 1100 device->identifier.name.string()); 1101 } 1102 } 1103} 1104 1105status_t EventHub::loadVirtualKeyMapLocked(Device* device) { 1106 // The virtual key map is supplied by the kernel as a system board property file. 1107 String8 path; 1108 path.append("/sys/board_properties/virtualkeys."); 1109 path.append(device->identifier.name); 1110 if (access(path.string(), R_OK)) { 1111 return NAME_NOT_FOUND; 1112 } 1113 return VirtualKeyMap::load(path, &device->virtualKeyMap); 1114} 1115 1116status_t EventHub::loadKeyMapLocked(Device* device) { 1117 return device->keyMap.load(device->identifier, device->configuration); 1118} 1119 1120bool EventHub::isExternalDeviceLocked(Device* device) { 1121 if (device->configuration) { 1122 bool value; 1123 if (device->configuration->tryGetProperty(String8("device.internal"), value)) { 1124 return !value; 1125 } 1126 } 1127 return device->identifier.bus == BUS_USB || device->identifier.bus == BUS_BLUETOOTH; 1128} 1129 1130bool EventHub::hasKeycodeLocked(Device* device, int keycode) const { 1131 if (!device->keyMap.haveKeyLayout() || !device->keyBitmask) { 1132 return false; 1133 } 1134 1135 Vector<int32_t> scanCodes; 1136 device->keyMap.keyLayoutMap->findScanCodesForKey(keycode, &scanCodes); 1137 const size_t N = scanCodes.size(); 1138 for (size_t i=0; i<N && i<=KEY_MAX; i++) { 1139 int32_t sc = scanCodes.itemAt(i); 1140 if (sc >= 0 && sc <= KEY_MAX && test_bit(sc, device->keyBitmask)) { 1141 return true; 1142 } 1143 } 1144 1145 return false; 1146} 1147 1148status_t EventHub::closeDeviceByPathLocked(const char *devicePath) { 1149 Device* device = getDeviceByPathLocked(devicePath); 1150 if (device) { 1151 closeDeviceLocked(device); 1152 return 0; 1153 } 1154 ALOGV("Remove device: %s not found, device may already have been removed.", devicePath); 1155 return -1; 1156} 1157 1158void EventHub::closeAllDevicesLocked() { 1159 while (mDevices.size() > 0) { 1160 closeDeviceLocked(mDevices.valueAt(mDevices.size() - 1)); 1161 } 1162} 1163 1164void EventHub::closeDeviceLocked(Device* device) { 1165 ALOGI("Removed device: path=%s name=%s id=%d fd=%d classes=0x%x\n", 1166 device->path.string(), device->identifier.name.string(), device->id, 1167 device->fd, device->classes); 1168 1169 if (device->id == mBuiltInKeyboardId) { 1170 ALOGW("built-in keyboard device %s (id=%d) is closing! the apps will not like this", 1171 device->path.string(), mBuiltInKeyboardId); 1172 mBuiltInKeyboardId = -1; 1173 } 1174 1175 if (epoll_ctl(mEpollFd, EPOLL_CTL_DEL, device->fd, NULL)) { 1176 ALOGW("Could not remove device fd from epoll instance. errno=%d", errno); 1177 } 1178 1179 mDevices.removeItem(device->id); 1180 device->close(); 1181 1182 // Unlink for opening devices list if it is present. 1183 Device* pred = NULL; 1184 bool found = false; 1185 for (Device* entry = mOpeningDevices; entry != NULL; ) { 1186 if (entry == device) { 1187 found = true; 1188 break; 1189 } 1190 pred = entry; 1191 entry = entry->next; 1192 } 1193 if (found) { 1194 // Unlink the device from the opening devices list then delete it. 1195 // We don't need to tell the client that the device was closed because 1196 // it does not even know it was opened in the first place. 1197 ALOGI("Device %s was immediately closed after opening.", device->path.string()); 1198 if (pred) { 1199 pred->next = device->next; 1200 } else { 1201 mOpeningDevices = device->next; 1202 } 1203 delete device; 1204 } else { 1205 // Link into closing devices list. 1206 // The device will be deleted later after we have informed the client. 1207 device->next = mClosingDevices; 1208 mClosingDevices = device; 1209 } 1210} 1211 1212status_t EventHub::readNotifyLocked() { 1213 int res; 1214 char devname[PATH_MAX]; 1215 char *filename; 1216 char event_buf[512]; 1217 int event_size; 1218 int event_pos = 0; 1219 struct inotify_event *event; 1220 1221 ALOGV("EventHub::readNotify nfd: %d\n", mINotifyFd); 1222 res = read(mINotifyFd, event_buf, sizeof(event_buf)); 1223 if(res < (int)sizeof(*event)) { 1224 if(errno == EINTR) 1225 return 0; 1226 ALOGW("could not get event, %s\n", strerror(errno)); 1227 return -1; 1228 } 1229 //printf("got %d bytes of event information\n", res); 1230 1231 strcpy(devname, DEVICE_PATH); 1232 filename = devname + strlen(devname); 1233 *filename++ = '/'; 1234 1235 while(res >= (int)sizeof(*event)) { 1236 event = (struct inotify_event *)(event_buf + event_pos); 1237 //printf("%d: %08x \"%s\"\n", event->wd, event->mask, event->len ? event->name : ""); 1238 if(event->len) { 1239 strcpy(filename, event->name); 1240 if(event->mask & IN_CREATE) { 1241 openDeviceLocked(devname); 1242 } else { 1243 ALOGI("Removing device '%s' due to inotify event\n", devname); 1244 closeDeviceByPathLocked(devname); 1245 } 1246 } 1247 event_size = sizeof(*event) + event->len; 1248 res -= event_size; 1249 event_pos += event_size; 1250 } 1251 return 0; 1252} 1253 1254status_t EventHub::scanDirLocked(const char *dirname) 1255{ 1256 char devname[PATH_MAX]; 1257 char *filename; 1258 DIR *dir; 1259 struct dirent *de; 1260 dir = opendir(dirname); 1261 if(dir == NULL) 1262 return -1; 1263 strcpy(devname, dirname); 1264 filename = devname + strlen(devname); 1265 *filename++ = '/'; 1266 while((de = readdir(dir))) { 1267 if(de->d_name[0] == '.' && 1268 (de->d_name[1] == '\0' || 1269 (de->d_name[1] == '.' && de->d_name[2] == '\0'))) 1270 continue; 1271 strcpy(filename, de->d_name); 1272 openDeviceLocked(devname); 1273 } 1274 closedir(dir); 1275 return 0; 1276} 1277 1278void EventHub::requestReopenDevices() { 1279 ALOGV("requestReopenDevices() called"); 1280 1281 AutoMutex _l(mLock); 1282 mNeedToReopenDevices = true; 1283} 1284 1285void EventHub::dump(String8& dump) { 1286 dump.append("Event Hub State:\n"); 1287 1288 { // acquire lock 1289 AutoMutex _l(mLock); 1290 1291 dump.appendFormat(INDENT "BuiltInKeyboardId: %d\n", mBuiltInKeyboardId); 1292 1293 dump.append(INDENT "Devices:\n"); 1294 1295 for (size_t i = 0; i < mDevices.size(); i++) { 1296 const Device* device = mDevices.valueAt(i); 1297 if (mBuiltInKeyboardId == device->id) { 1298 dump.appendFormat(INDENT2 "%d: %s (aka device 0 - built-in keyboard)\n", 1299 device->id, device->identifier.name.string()); 1300 } else { 1301 dump.appendFormat(INDENT2 "%d: %s\n", device->id, 1302 device->identifier.name.string()); 1303 } 1304 dump.appendFormat(INDENT3 "Classes: 0x%08x\n", device->classes); 1305 dump.appendFormat(INDENT3 "Path: %s\n", device->path.string()); 1306 dump.appendFormat(INDENT3 "Location: %s\n", device->identifier.location.string()); 1307 dump.appendFormat(INDENT3 "UniqueId: %s\n", device->identifier.uniqueId.string()); 1308 dump.appendFormat(INDENT3 "Identifier: bus=0x%04x, vendor=0x%04x, " 1309 "product=0x%04x, version=0x%04x\n", 1310 device->identifier.bus, device->identifier.vendor, 1311 device->identifier.product, device->identifier.version); 1312 dump.appendFormat(INDENT3 "KeyLayoutFile: %s\n", 1313 device->keyMap.keyLayoutFile.string()); 1314 dump.appendFormat(INDENT3 "KeyCharacterMapFile: %s\n", 1315 device->keyMap.keyCharacterMapFile.string()); 1316 dump.appendFormat(INDENT3 "ConfigurationFile: %s\n", 1317 device->configurationFile.string()); 1318 } 1319 } // release lock 1320} 1321 1322void EventHub::monitor() { 1323 // Acquire and release the lock to ensure that the event hub has not deadlocked. 1324 mLock.lock(); 1325 mLock.unlock(); 1326} 1327 1328 1329}; // namespace android 1330