EventHub.cpp revision 49ccac530b5a798e3c4a79b66b51b8546a0deed1
1/* 2 * Copyright (C) 2005 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#define LOG_TAG "EventHub" 18 19// #define LOG_NDEBUG 0 20 21#include "EventHub.h" 22 23#include <hardware_legacy/power.h> 24 25#include <cutils/properties.h> 26#include <utils/Log.h> 27#include <utils/Timers.h> 28#include <utils/threads.h> 29#include <utils/Errors.h> 30 31#include <stdlib.h> 32#include <stdio.h> 33#include <unistd.h> 34#include <fcntl.h> 35#include <memory.h> 36#include <errno.h> 37#include <assert.h> 38 39#include <androidfw/KeyLayoutMap.h> 40#include <androidfw/KeyCharacterMap.h> 41#include <androidfw/VirtualKeyMap.h> 42 43#include <sha1.h> 44#include <string.h> 45#include <stdint.h> 46#include <dirent.h> 47 48#include <sys/inotify.h> 49#include <sys/epoll.h> 50#include <sys/ioctl.h> 51#include <sys/limits.h> 52 53/* this macro is used to tell if "bit" is set in "array" 54 * it selects a byte from the array, and does a boolean AND 55 * operation with a byte that only has the relevant bit set. 56 * eg. to check for the 12th bit, we do (array[1] & 1<<4) 57 */ 58#define test_bit(bit, array) (array[bit/8] & (1<<(bit%8))) 59 60/* this macro computes the number of bytes needed to represent a bit array of the specified size */ 61#define sizeof_bit_array(bits) ((bits + 7) / 8) 62 63#define INDENT " " 64#define INDENT2 " " 65#define INDENT3 " " 66 67namespace android { 68 69static const char *WAKE_LOCK_ID = "KeyEvents"; 70static const char *DEVICE_PATH = "/dev/input"; 71 72/* return the larger integer */ 73static inline int max(int v1, int v2) 74{ 75 return (v1 > v2) ? v1 : v2; 76} 77 78static inline const char* toString(bool value) { 79 return value ? "true" : "false"; 80} 81 82static String8 sha1(const String8& in) { 83 SHA1_CTX ctx; 84 SHA1Init(&ctx); 85 SHA1Update(&ctx, reinterpret_cast<const u_char*>(in.string()), in.size()); 86 u_char digest[SHA1_DIGEST_LENGTH]; 87 SHA1Final(digest, &ctx); 88 89 String8 out; 90 for (size_t i = 0; i < SHA1_DIGEST_LENGTH; i++) { 91 out.appendFormat("%02x", digest[i]); 92 } 93 return out; 94} 95 96static void setDescriptor(InputDeviceIdentifier& identifier) { 97 // Compute a device descriptor that uniquely identifies the device. 98 // The descriptor is assumed to be a stable identifier. Its value should not 99 // change between reboots, reconnections, firmware updates or new releases of Android. 100 // Ideally, we also want the descriptor to be short and relatively opaque. 101 String8 rawDescriptor; 102 rawDescriptor.appendFormat(":%04x:%04x:", identifier.vendor, identifier.product); 103 if (!identifier.uniqueId.isEmpty()) { 104 rawDescriptor.append("uniqueId:"); 105 rawDescriptor.append(identifier.uniqueId); 106 } if (identifier.vendor == 0 && identifier.product == 0) { 107 // If we don't know the vendor and product id, then the device is probably 108 // built-in so we need to rely on other information to uniquely identify 109 // the input device. Usually we try to avoid relying on the device name or 110 // location but for built-in input device, they are unlikely to ever change. 111 if (!identifier.name.isEmpty()) { 112 rawDescriptor.append("name:"); 113 rawDescriptor.append(identifier.name); 114 } else if (!identifier.location.isEmpty()) { 115 rawDescriptor.append("location:"); 116 rawDescriptor.append(identifier.location); 117 } 118 } 119 identifier.descriptor = sha1(rawDescriptor); 120 ALOGV("Created descriptor: raw=%s, cooked=%s", rawDescriptor.string(), 121 identifier.descriptor.string()); 122} 123 124// --- Global Functions --- 125 126uint32_t getAbsAxisUsage(int32_t axis, uint32_t deviceClasses) { 127 // Touch devices get dibs on touch-related axes. 128 if (deviceClasses & INPUT_DEVICE_CLASS_TOUCH) { 129 switch (axis) { 130 case ABS_X: 131 case ABS_Y: 132 case ABS_PRESSURE: 133 case ABS_TOOL_WIDTH: 134 case ABS_DISTANCE: 135 case ABS_TILT_X: 136 case ABS_TILT_Y: 137 case ABS_MT_SLOT: 138 case ABS_MT_TOUCH_MAJOR: 139 case ABS_MT_TOUCH_MINOR: 140 case ABS_MT_WIDTH_MAJOR: 141 case ABS_MT_WIDTH_MINOR: 142 case ABS_MT_ORIENTATION: 143 case ABS_MT_POSITION_X: 144 case ABS_MT_POSITION_Y: 145 case ABS_MT_TOOL_TYPE: 146 case ABS_MT_BLOB_ID: 147 case ABS_MT_TRACKING_ID: 148 case ABS_MT_PRESSURE: 149 case ABS_MT_DISTANCE: 150 return INPUT_DEVICE_CLASS_TOUCH; 151 } 152 } 153 154 // Joystick devices get the rest. 155 return deviceClasses & INPUT_DEVICE_CLASS_JOYSTICK; 156} 157 158// --- EventHub::Device --- 159 160EventHub::Device::Device(int fd, int32_t id, const String8& path, 161 const InputDeviceIdentifier& identifier) : 162 next(NULL), 163 fd(fd), id(id), path(path), identifier(identifier), 164 classes(0), configuration(NULL), virtualKeyMap(NULL) { 165 memset(keyBitmask, 0, sizeof(keyBitmask)); 166 memset(absBitmask, 0, sizeof(absBitmask)); 167 memset(relBitmask, 0, sizeof(relBitmask)); 168 memset(swBitmask, 0, sizeof(swBitmask)); 169 memset(ledBitmask, 0, sizeof(ledBitmask)); 170 memset(propBitmask, 0, sizeof(propBitmask)); 171} 172 173EventHub::Device::~Device() { 174 close(); 175 delete configuration; 176 delete virtualKeyMap; 177} 178 179void EventHub::Device::close() { 180 if (fd >= 0) { 181 ::close(fd); 182 fd = -1; 183 } 184} 185 186 187// --- EventHub --- 188 189const uint32_t EventHub::EPOLL_ID_INOTIFY; 190const uint32_t EventHub::EPOLL_ID_WAKE; 191const int EventHub::EPOLL_SIZE_HINT; 192const int EventHub::EPOLL_MAX_EVENTS; 193 194EventHub::EventHub(void) : 195 mBuiltInKeyboardId(NO_BUILT_IN_KEYBOARD), mNextDeviceId(1), 196 mOpeningDevices(0), mClosingDevices(0), 197 mNeedToSendFinishedDeviceScan(false), 198 mNeedToReopenDevices(false), mNeedToScanDevices(true), 199 mPendingEventCount(0), mPendingEventIndex(0), mPendingINotify(false) { 200 acquire_wake_lock(PARTIAL_WAKE_LOCK, WAKE_LOCK_ID); 201 202 mEpollFd = epoll_create(EPOLL_SIZE_HINT); 203 LOG_ALWAYS_FATAL_IF(mEpollFd < 0, "Could not create epoll instance. errno=%d", errno); 204 205 mINotifyFd = inotify_init(); 206 int result = inotify_add_watch(mINotifyFd, DEVICE_PATH, IN_DELETE | IN_CREATE); 207 LOG_ALWAYS_FATAL_IF(result < 0, "Could not register INotify for %s. errno=%d", 208 DEVICE_PATH, errno); 209 210 struct epoll_event eventItem; 211 memset(&eventItem, 0, sizeof(eventItem)); 212 eventItem.events = EPOLLIN; 213 eventItem.data.u32 = EPOLL_ID_INOTIFY; 214 result = epoll_ctl(mEpollFd, EPOLL_CTL_ADD, mINotifyFd, &eventItem); 215 LOG_ALWAYS_FATAL_IF(result != 0, "Could not add INotify to epoll instance. errno=%d", errno); 216 217 int wakeFds[2]; 218 result = pipe(wakeFds); 219 LOG_ALWAYS_FATAL_IF(result != 0, "Could not create wake pipe. errno=%d", errno); 220 221 mWakeReadPipeFd = wakeFds[0]; 222 mWakeWritePipeFd = wakeFds[1]; 223 224 result = fcntl(mWakeReadPipeFd, F_SETFL, O_NONBLOCK); 225 LOG_ALWAYS_FATAL_IF(result != 0, "Could not make wake read pipe non-blocking. errno=%d", 226 errno); 227 228 result = fcntl(mWakeWritePipeFd, F_SETFL, O_NONBLOCK); 229 LOG_ALWAYS_FATAL_IF(result != 0, "Could not make wake write pipe non-blocking. errno=%d", 230 errno); 231 232 eventItem.data.u32 = EPOLL_ID_WAKE; 233 result = epoll_ctl(mEpollFd, EPOLL_CTL_ADD, mWakeReadPipeFd, &eventItem); 234 LOG_ALWAYS_FATAL_IF(result != 0, "Could not add wake read pipe to epoll instance. errno=%d", 235 errno); 236} 237 238EventHub::~EventHub(void) { 239 closeAllDevicesLocked(); 240 241 while (mClosingDevices) { 242 Device* device = mClosingDevices; 243 mClosingDevices = device->next; 244 delete device; 245 } 246 247 ::close(mEpollFd); 248 ::close(mINotifyFd); 249 ::close(mWakeReadPipeFd); 250 ::close(mWakeWritePipeFd); 251 252 release_wake_lock(WAKE_LOCK_ID); 253} 254 255InputDeviceIdentifier EventHub::getDeviceIdentifier(int32_t deviceId) const { 256 AutoMutex _l(mLock); 257 Device* device = getDeviceLocked(deviceId); 258 if (device == NULL) return InputDeviceIdentifier(); 259 return device->identifier; 260} 261 262uint32_t EventHub::getDeviceClasses(int32_t deviceId) const { 263 AutoMutex _l(mLock); 264 Device* device = getDeviceLocked(deviceId); 265 if (device == NULL) return 0; 266 return device->classes; 267} 268 269void EventHub::getConfiguration(int32_t deviceId, PropertyMap* outConfiguration) const { 270 AutoMutex _l(mLock); 271 Device* device = getDeviceLocked(deviceId); 272 if (device && device->configuration) { 273 *outConfiguration = *device->configuration; 274 } else { 275 outConfiguration->clear(); 276 } 277} 278 279status_t EventHub::getAbsoluteAxisInfo(int32_t deviceId, int axis, 280 RawAbsoluteAxisInfo* outAxisInfo) const { 281 outAxisInfo->clear(); 282 283 if (axis >= 0 && axis <= ABS_MAX) { 284 AutoMutex _l(mLock); 285 286 Device* device = getDeviceLocked(deviceId); 287 if (device && !device->isVirtual() && test_bit(axis, device->absBitmask)) { 288 struct input_absinfo info; 289 if(ioctl(device->fd, EVIOCGABS(axis), &info)) { 290 ALOGW("Error reading absolute controller %d for device %s fd %d, errno=%d", 291 axis, device->identifier.name.string(), device->fd, errno); 292 return -errno; 293 } 294 295 if (info.minimum != info.maximum) { 296 outAxisInfo->valid = true; 297 outAxisInfo->minValue = info.minimum; 298 outAxisInfo->maxValue = info.maximum; 299 outAxisInfo->flat = info.flat; 300 outAxisInfo->fuzz = info.fuzz; 301 outAxisInfo->resolution = info.resolution; 302 } 303 return OK; 304 } 305 } 306 return -1; 307} 308 309bool EventHub::hasRelativeAxis(int32_t deviceId, int axis) const { 310 if (axis >= 0 && axis <= REL_MAX) { 311 AutoMutex _l(mLock); 312 313 Device* device = getDeviceLocked(deviceId); 314 if (device) { 315 return test_bit(axis, device->relBitmask); 316 } 317 } 318 return false; 319} 320 321bool EventHub::hasInputProperty(int32_t deviceId, int property) const { 322 if (property >= 0 && property <= INPUT_PROP_MAX) { 323 AutoMutex _l(mLock); 324 325 Device* device = getDeviceLocked(deviceId); 326 if (device) { 327 return test_bit(property, device->propBitmask); 328 } 329 } 330 return false; 331} 332 333int32_t EventHub::getScanCodeState(int32_t deviceId, int32_t scanCode) const { 334 if (scanCode >= 0 && scanCode <= KEY_MAX) { 335 AutoMutex _l(mLock); 336 337 Device* device = getDeviceLocked(deviceId); 338 if (device && !device->isVirtual() && test_bit(scanCode, device->keyBitmask)) { 339 uint8_t keyState[sizeof_bit_array(KEY_MAX + 1)]; 340 memset(keyState, 0, sizeof(keyState)); 341 if (ioctl(device->fd, EVIOCGKEY(sizeof(keyState)), keyState) >= 0) { 342 return test_bit(scanCode, keyState) ? AKEY_STATE_DOWN : AKEY_STATE_UP; 343 } 344 } 345 } 346 return AKEY_STATE_UNKNOWN; 347} 348 349int32_t EventHub::getKeyCodeState(int32_t deviceId, int32_t keyCode) const { 350 AutoMutex _l(mLock); 351 352 Device* device = getDeviceLocked(deviceId); 353 if (device && !device->isVirtual() && device->keyMap.haveKeyLayout()) { 354 Vector<int32_t> scanCodes; 355 device->keyMap.keyLayoutMap->findScanCodesForKey(keyCode, &scanCodes); 356 if (scanCodes.size() != 0) { 357 uint8_t keyState[sizeof_bit_array(KEY_MAX + 1)]; 358 memset(keyState, 0, sizeof(keyState)); 359 if (ioctl(device->fd, EVIOCGKEY(sizeof(keyState)), keyState) >= 0) { 360 for (size_t i = 0; i < scanCodes.size(); i++) { 361 int32_t sc = scanCodes.itemAt(i); 362 if (sc >= 0 && sc <= KEY_MAX && test_bit(sc, keyState)) { 363 return AKEY_STATE_DOWN; 364 } 365 } 366 return AKEY_STATE_UP; 367 } 368 } 369 } 370 return AKEY_STATE_UNKNOWN; 371} 372 373int32_t EventHub::getSwitchState(int32_t deviceId, int32_t sw) const { 374 if (sw >= 0 && sw <= SW_MAX) { 375 AutoMutex _l(mLock); 376 377 Device* device = getDeviceLocked(deviceId); 378 if (device && !device->isVirtual() && test_bit(sw, device->swBitmask)) { 379 uint8_t swState[sizeof_bit_array(SW_MAX + 1)]; 380 memset(swState, 0, sizeof(swState)); 381 if (ioctl(device->fd, EVIOCGSW(sizeof(swState)), swState) >= 0) { 382 return test_bit(sw, swState) ? AKEY_STATE_DOWN : AKEY_STATE_UP; 383 } 384 } 385 } 386 return AKEY_STATE_UNKNOWN; 387} 388 389status_t EventHub::getAbsoluteAxisValue(int32_t deviceId, int32_t axis, int32_t* outValue) const { 390 *outValue = 0; 391 392 if (axis >= 0 && axis <= ABS_MAX) { 393 AutoMutex _l(mLock); 394 395 Device* device = getDeviceLocked(deviceId); 396 if (device && !device->isVirtual() && test_bit(axis, device->absBitmask)) { 397 struct input_absinfo info; 398 if(ioctl(device->fd, EVIOCGABS(axis), &info)) { 399 ALOGW("Error reading absolute controller %d for device %s fd %d, errno=%d", 400 axis, device->identifier.name.string(), device->fd, errno); 401 return -errno; 402 } 403 404 *outValue = info.value; 405 return OK; 406 } 407 } 408 return -1; 409} 410 411bool EventHub::markSupportedKeyCodes(int32_t deviceId, size_t numCodes, 412 const int32_t* keyCodes, uint8_t* outFlags) const { 413 AutoMutex _l(mLock); 414 415 Device* device = getDeviceLocked(deviceId); 416 if (device && device->keyMap.haveKeyLayout()) { 417 Vector<int32_t> scanCodes; 418 for (size_t codeIndex = 0; codeIndex < numCodes; codeIndex++) { 419 scanCodes.clear(); 420 421 status_t err = device->keyMap.keyLayoutMap->findScanCodesForKey( 422 keyCodes[codeIndex], &scanCodes); 423 if (! err) { 424 // check the possible scan codes identified by the layout map against the 425 // map of codes actually emitted by the driver 426 for (size_t sc = 0; sc < scanCodes.size(); sc++) { 427 if (test_bit(scanCodes[sc], device->keyBitmask)) { 428 outFlags[codeIndex] = 1; 429 break; 430 } 431 } 432 } 433 } 434 return true; 435 } 436 return false; 437} 438 439status_t EventHub::mapKey(int32_t deviceId, int32_t scanCode, int32_t usageCode, 440 int32_t* outKeycode, uint32_t* outFlags) const { 441 AutoMutex _l(mLock); 442 Device* device = getDeviceLocked(deviceId); 443 444 if (device && device->keyMap.haveKeyLayout()) { 445 status_t err = device->keyMap.keyLayoutMap->mapKey( 446 scanCode, usageCode, outKeycode, outFlags); 447 if (err == NO_ERROR) { 448 return NO_ERROR; 449 } 450 } 451 452 *outKeycode = 0; 453 *outFlags = 0; 454 return NAME_NOT_FOUND; 455} 456 457status_t EventHub::mapAxis(int32_t deviceId, int32_t scanCode, AxisInfo* outAxisInfo) const { 458 AutoMutex _l(mLock); 459 Device* device = getDeviceLocked(deviceId); 460 461 if (device && device->keyMap.haveKeyLayout()) { 462 status_t err = device->keyMap.keyLayoutMap->mapAxis(scanCode, outAxisInfo); 463 if (err == NO_ERROR) { 464 return NO_ERROR; 465 } 466 } 467 468 return NAME_NOT_FOUND; 469} 470 471void EventHub::setExcludedDevices(const Vector<String8>& devices) { 472 AutoMutex _l(mLock); 473 474 mExcludedDevices = devices; 475} 476 477bool EventHub::hasScanCode(int32_t deviceId, int32_t scanCode) const { 478 AutoMutex _l(mLock); 479 Device* device = getDeviceLocked(deviceId); 480 if (device && scanCode >= 0 && scanCode <= KEY_MAX) { 481 if (test_bit(scanCode, device->keyBitmask)) { 482 return true; 483 } 484 } 485 return false; 486} 487 488bool EventHub::hasLed(int32_t deviceId, int32_t led) const { 489 AutoMutex _l(mLock); 490 Device* device = getDeviceLocked(deviceId); 491 if (device && led >= 0 && led <= LED_MAX) { 492 if (test_bit(led, device->ledBitmask)) { 493 return true; 494 } 495 } 496 return false; 497} 498 499void EventHub::setLedState(int32_t deviceId, int32_t led, bool on) { 500 AutoMutex _l(mLock); 501 Device* device = getDeviceLocked(deviceId); 502 if (device && !device->isVirtual() && led >= 0 && led <= LED_MAX) { 503 struct input_event ev; 504 ev.time.tv_sec = 0; 505 ev.time.tv_usec = 0; 506 ev.type = EV_LED; 507 ev.code = led; 508 ev.value = on ? 1 : 0; 509 510 ssize_t nWrite; 511 do { 512 nWrite = write(device->fd, &ev, sizeof(struct input_event)); 513 } while (nWrite == -1 && errno == EINTR); 514 } 515} 516 517void EventHub::getVirtualKeyDefinitions(int32_t deviceId, 518 Vector<VirtualKeyDefinition>& outVirtualKeys) const { 519 outVirtualKeys.clear(); 520 521 AutoMutex _l(mLock); 522 Device* device = getDeviceLocked(deviceId); 523 if (device && device->virtualKeyMap) { 524 outVirtualKeys.appendVector(device->virtualKeyMap->getVirtualKeys()); 525 } 526} 527 528sp<KeyCharacterMap> EventHub::getKeyCharacterMap(int32_t deviceId) const { 529 AutoMutex _l(mLock); 530 Device* device = getDeviceLocked(deviceId); 531 if (device) { 532 return device->keyMap.keyCharacterMap; 533 } 534 return NULL; 535} 536 537EventHub::Device* EventHub::getDeviceLocked(int32_t deviceId) const { 538 if (deviceId == BUILT_IN_KEYBOARD_ID) { 539 deviceId = mBuiltInKeyboardId; 540 } 541 ssize_t index = mDevices.indexOfKey(deviceId); 542 return index >= 0 ? mDevices.valueAt(index) : NULL; 543} 544 545EventHub::Device* EventHub::getDeviceByPathLocked(const char* devicePath) const { 546 for (size_t i = 0; i < mDevices.size(); i++) { 547 Device* device = mDevices.valueAt(i); 548 if (device->path == devicePath) { 549 return device; 550 } 551 } 552 return NULL; 553} 554 555size_t EventHub::getEvents(int timeoutMillis, RawEvent* buffer, size_t bufferSize) { 556 ALOG_ASSERT(bufferSize >= 1); 557 558 AutoMutex _l(mLock); 559 560 struct input_event readBuffer[bufferSize]; 561 562 RawEvent* event = buffer; 563 size_t capacity = bufferSize; 564 bool awoken = false; 565 for (;;) { 566 nsecs_t now = systemTime(SYSTEM_TIME_MONOTONIC); 567 568 // Reopen input devices if needed. 569 if (mNeedToReopenDevices) { 570 mNeedToReopenDevices = false; 571 572 ALOGI("Reopening all input devices due to a configuration change."); 573 574 closeAllDevicesLocked(); 575 mNeedToScanDevices = true; 576 break; // return to the caller before we actually rescan 577 } 578 579 // Report any devices that had last been added/removed. 580 while (mClosingDevices) { 581 Device* device = mClosingDevices; 582 ALOGV("Reporting device closed: id=%d, name=%s\n", 583 device->id, device->path.string()); 584 mClosingDevices = device->next; 585 event->when = now; 586 event->deviceId = device->id == mBuiltInKeyboardId ? BUILT_IN_KEYBOARD_ID : device->id; 587 event->type = DEVICE_REMOVED; 588 event += 1; 589 delete device; 590 mNeedToSendFinishedDeviceScan = true; 591 if (--capacity == 0) { 592 break; 593 } 594 } 595 596 if (mNeedToScanDevices) { 597 mNeedToScanDevices = false; 598 scanDevicesLocked(); 599 mNeedToSendFinishedDeviceScan = true; 600 } 601 602 while (mOpeningDevices != NULL) { 603 Device* device = mOpeningDevices; 604 ALOGV("Reporting device opened: id=%d, name=%s\n", 605 device->id, device->path.string()); 606 mOpeningDevices = device->next; 607 event->when = now; 608 event->deviceId = device->id == mBuiltInKeyboardId ? 0 : device->id; 609 event->type = DEVICE_ADDED; 610 event += 1; 611 mNeedToSendFinishedDeviceScan = true; 612 if (--capacity == 0) { 613 break; 614 } 615 } 616 617 if (mNeedToSendFinishedDeviceScan) { 618 mNeedToSendFinishedDeviceScan = false; 619 event->when = now; 620 event->type = FINISHED_DEVICE_SCAN; 621 event += 1; 622 if (--capacity == 0) { 623 break; 624 } 625 } 626 627 // Grab the next input event. 628 bool deviceChanged = false; 629 while (mPendingEventIndex < mPendingEventCount) { 630 const struct epoll_event& eventItem = mPendingEventItems[mPendingEventIndex++]; 631 if (eventItem.data.u32 == EPOLL_ID_INOTIFY) { 632 if (eventItem.events & EPOLLIN) { 633 mPendingINotify = true; 634 } else { 635 ALOGW("Received unexpected epoll event 0x%08x for INotify.", eventItem.events); 636 } 637 continue; 638 } 639 640 if (eventItem.data.u32 == EPOLL_ID_WAKE) { 641 if (eventItem.events & EPOLLIN) { 642 ALOGV("awoken after wake()"); 643 awoken = true; 644 char buffer[16]; 645 ssize_t nRead; 646 do { 647 nRead = read(mWakeReadPipeFd, buffer, sizeof(buffer)); 648 } while ((nRead == -1 && errno == EINTR) || nRead == sizeof(buffer)); 649 } else { 650 ALOGW("Received unexpected epoll event 0x%08x for wake read pipe.", 651 eventItem.events); 652 } 653 continue; 654 } 655 656 ssize_t deviceIndex = mDevices.indexOfKey(eventItem.data.u32); 657 if (deviceIndex < 0) { 658 ALOGW("Received unexpected epoll event 0x%08x for unknown device id %d.", 659 eventItem.events, eventItem.data.u32); 660 continue; 661 } 662 663 Device* device = mDevices.valueAt(deviceIndex); 664 if (eventItem.events & EPOLLIN) { 665 int32_t readSize = read(device->fd, readBuffer, 666 sizeof(struct input_event) * capacity); 667 if (readSize == 0 || (readSize < 0 && errno == ENODEV)) { 668 // Device was removed before INotify noticed. 669 ALOGW("could not get event, removed? (fd: %d size: %d bufferSize: %d " 670 "capacity: %d errno: %d)\n", 671 device->fd, readSize, bufferSize, capacity, errno); 672 deviceChanged = true; 673 closeDeviceLocked(device); 674 } else if (readSize < 0) { 675 if (errno != EAGAIN && errno != EINTR) { 676 ALOGW("could not get event (errno=%d)", errno); 677 } 678 } else if ((readSize % sizeof(struct input_event)) != 0) { 679 ALOGE("could not get event (wrong size: %d)", readSize); 680 } else { 681 int32_t deviceId = device->id == mBuiltInKeyboardId ? 0 : device->id; 682 683 size_t count = size_t(readSize) / sizeof(struct input_event); 684 for (size_t i = 0; i < count; i++) { 685 const struct input_event& iev = readBuffer[i]; 686 ALOGV("%s got: t0=%d, t1=%d, type=%d, code=%d, value=%d", 687 device->path.string(), 688 (int) iev.time.tv_sec, (int) iev.time.tv_usec, 689 iev.type, iev.code, iev.value); 690 691#ifdef HAVE_POSIX_CLOCKS 692 // Use the time specified in the event instead of the current time 693 // so that downstream code can get more accurate estimates of 694 // event dispatch latency from the time the event is enqueued onto 695 // the evdev client buffer. 696 // 697 // The event's timestamp fortuitously uses the same monotonic clock 698 // time base as the rest of Android. The kernel event device driver 699 // (drivers/input/evdev.c) obtains timestamps using ktime_get_ts(). 700 // The systemTime(SYSTEM_TIME_MONOTONIC) function we use everywhere 701 // calls clock_gettime(CLOCK_MONOTONIC) which is implemented as a 702 // system call that also queries ktime_get_ts(). 703 event->when = nsecs_t(iev.time.tv_sec) * 1000000000LL 704 + nsecs_t(iev.time.tv_usec) * 1000LL; 705 ALOGV("event time %lld, now %lld", event->when, now); 706#else 707 event->when = now; 708#endif 709 event->deviceId = deviceId; 710 event->type = iev.type; 711 event->code = iev.code; 712 event->value = iev.value; 713 event += 1; 714 } 715 capacity -= count; 716 if (capacity == 0) { 717 // The result buffer is full. Reset the pending event index 718 // so we will try to read the device again on the next iteration. 719 mPendingEventIndex -= 1; 720 break; 721 } 722 } 723 } else { 724 ALOGW("Received unexpected epoll event 0x%08x for device %s.", 725 eventItem.events, device->identifier.name.string()); 726 } 727 } 728 729 // readNotify() will modify the list of devices so this must be done after 730 // processing all other events to ensure that we read all remaining events 731 // before closing the devices. 732 if (mPendingINotify && mPendingEventIndex >= mPendingEventCount) { 733 mPendingINotify = false; 734 readNotifyLocked(); 735 deviceChanged = true; 736 } 737 738 // Report added or removed devices immediately. 739 if (deviceChanged) { 740 continue; 741 } 742 743 // Return now if we have collected any events or if we were explicitly awoken. 744 if (event != buffer || awoken) { 745 break; 746 } 747 748 // Poll for events. Mind the wake lock dance! 749 // We hold a wake lock at all times except during epoll_wait(). This works due to some 750 // subtle choreography. When a device driver has pending (unread) events, it acquires 751 // a kernel wake lock. However, once the last pending event has been read, the device 752 // driver will release the kernel wake lock. To prevent the system from going to sleep 753 // when this happens, the EventHub holds onto its own user wake lock while the client 754 // is processing events. Thus the system can only sleep if there are no events 755 // pending or currently being processed. 756 // 757 // The timeout is advisory only. If the device is asleep, it will not wake just to 758 // service the timeout. 759 mPendingEventIndex = 0; 760 761 mLock.unlock(); // release lock before poll, must be before release_wake_lock 762 release_wake_lock(WAKE_LOCK_ID); 763 764 int pollResult = epoll_wait(mEpollFd, mPendingEventItems, EPOLL_MAX_EVENTS, timeoutMillis); 765 766 acquire_wake_lock(PARTIAL_WAKE_LOCK, WAKE_LOCK_ID); 767 mLock.lock(); // reacquire lock after poll, must be after acquire_wake_lock 768 769 if (pollResult == 0) { 770 // Timed out. 771 mPendingEventCount = 0; 772 break; 773 } 774 775 if (pollResult < 0) { 776 // An error occurred. 777 mPendingEventCount = 0; 778 779 // Sleep after errors to avoid locking up the system. 780 // Hopefully the error is transient. 781 if (errno != EINTR) { 782 ALOGW("poll failed (errno=%d)\n", errno); 783 usleep(100000); 784 } 785 } else { 786 // Some events occurred. 787 mPendingEventCount = size_t(pollResult); 788 } 789 } 790 791 // All done, return the number of events we read. 792 return event - buffer; 793} 794 795void EventHub::wake() { 796 ALOGV("wake() called"); 797 798 ssize_t nWrite; 799 do { 800 nWrite = write(mWakeWritePipeFd, "W", 1); 801 } while (nWrite == -1 && errno == EINTR); 802 803 if (nWrite != 1 && errno != EAGAIN) { 804 ALOGW("Could not write wake signal, errno=%d", errno); 805 } 806} 807 808void EventHub::scanDevicesLocked() { 809 status_t res = scanDirLocked(DEVICE_PATH); 810 if(res < 0) { 811 ALOGE("scan dir failed for %s\n", DEVICE_PATH); 812 } 813 if (mDevices.indexOfKey(VIRTUAL_KEYBOARD_ID) < 0) { 814 createVirtualKeyboardLocked(); 815 } 816} 817 818// ---------------------------------------------------------------------------- 819 820static bool containsNonZeroByte(const uint8_t* array, uint32_t startIndex, uint32_t endIndex) { 821 const uint8_t* end = array + endIndex; 822 array += startIndex; 823 while (array != end) { 824 if (*(array++) != 0) { 825 return true; 826 } 827 } 828 return false; 829} 830 831static const int32_t GAMEPAD_KEYCODES[] = { 832 AKEYCODE_BUTTON_A, AKEYCODE_BUTTON_B, AKEYCODE_BUTTON_C, 833 AKEYCODE_BUTTON_X, AKEYCODE_BUTTON_Y, AKEYCODE_BUTTON_Z, 834 AKEYCODE_BUTTON_L1, AKEYCODE_BUTTON_R1, 835 AKEYCODE_BUTTON_L2, AKEYCODE_BUTTON_R2, 836 AKEYCODE_BUTTON_THUMBL, AKEYCODE_BUTTON_THUMBR, 837 AKEYCODE_BUTTON_START, AKEYCODE_BUTTON_SELECT, AKEYCODE_BUTTON_MODE, 838 AKEYCODE_BUTTON_1, AKEYCODE_BUTTON_2, AKEYCODE_BUTTON_3, AKEYCODE_BUTTON_4, 839 AKEYCODE_BUTTON_5, AKEYCODE_BUTTON_6, AKEYCODE_BUTTON_7, AKEYCODE_BUTTON_8, 840 AKEYCODE_BUTTON_9, AKEYCODE_BUTTON_10, AKEYCODE_BUTTON_11, AKEYCODE_BUTTON_12, 841 AKEYCODE_BUTTON_13, AKEYCODE_BUTTON_14, AKEYCODE_BUTTON_15, AKEYCODE_BUTTON_16, 842}; 843 844status_t EventHub::openDeviceLocked(const char *devicePath) { 845 char buffer[80]; 846 847 ALOGV("Opening device: %s", devicePath); 848 849 int fd = open(devicePath, O_RDWR | O_CLOEXEC); 850 if(fd < 0) { 851 ALOGE("could not open %s, %s\n", devicePath, strerror(errno)); 852 return -1; 853 } 854 855 InputDeviceIdentifier identifier; 856 857 // Get device name. 858 if(ioctl(fd, EVIOCGNAME(sizeof(buffer) - 1), &buffer) < 1) { 859 //fprintf(stderr, "could not get device name for %s, %s\n", devicePath, strerror(errno)); 860 } else { 861 buffer[sizeof(buffer) - 1] = '\0'; 862 identifier.name.setTo(buffer); 863 } 864 865 // Check to see if the device is on our excluded list 866 for (size_t i = 0; i < mExcludedDevices.size(); i++) { 867 const String8& item = mExcludedDevices.itemAt(i); 868 if (identifier.name == item) { 869 ALOGI("ignoring event id %s driver %s\n", devicePath, item.string()); 870 close(fd); 871 return -1; 872 } 873 } 874 875 // Get device driver version. 876 int driverVersion; 877 if(ioctl(fd, EVIOCGVERSION, &driverVersion)) { 878 ALOGE("could not get driver version for %s, %s\n", devicePath, strerror(errno)); 879 close(fd); 880 return -1; 881 } 882 883 // Get device identifier. 884 struct input_id inputId; 885 if(ioctl(fd, EVIOCGID, &inputId)) { 886 ALOGE("could not get device input id for %s, %s\n", devicePath, strerror(errno)); 887 close(fd); 888 return -1; 889 } 890 identifier.bus = inputId.bustype; 891 identifier.product = inputId.product; 892 identifier.vendor = inputId.vendor; 893 identifier.version = inputId.version; 894 895 // Get device physical location. 896 if(ioctl(fd, EVIOCGPHYS(sizeof(buffer) - 1), &buffer) < 1) { 897 //fprintf(stderr, "could not get location for %s, %s\n", devicePath, strerror(errno)); 898 } else { 899 buffer[sizeof(buffer) - 1] = '\0'; 900 identifier.location.setTo(buffer); 901 } 902 903 // Get device unique id. 904 if(ioctl(fd, EVIOCGUNIQ(sizeof(buffer) - 1), &buffer) < 1) { 905 //fprintf(stderr, "could not get idstring for %s, %s\n", devicePath, strerror(errno)); 906 } else { 907 buffer[sizeof(buffer) - 1] = '\0'; 908 identifier.uniqueId.setTo(buffer); 909 } 910 911 // Fill in the descriptor. 912 setDescriptor(identifier); 913 914 // Make file descriptor non-blocking for use with poll(). 915 if (fcntl(fd, F_SETFL, O_NONBLOCK)) { 916 ALOGE("Error %d making device file descriptor non-blocking.", errno); 917 close(fd); 918 return -1; 919 } 920 921 // Allocate device. (The device object takes ownership of the fd at this point.) 922 int32_t deviceId = mNextDeviceId++; 923 Device* device = new Device(fd, deviceId, String8(devicePath), identifier); 924 925 ALOGV("add device %d: %s\n", deviceId, devicePath); 926 ALOGV(" bus: %04x\n" 927 " vendor %04x\n" 928 " product %04x\n" 929 " version %04x\n", 930 identifier.bus, identifier.vendor, identifier.product, identifier.version); 931 ALOGV(" name: \"%s\"\n", identifier.name.string()); 932 ALOGV(" location: \"%s\"\n", identifier.location.string()); 933 ALOGV(" unique id: \"%s\"\n", identifier.uniqueId.string()); 934 ALOGV(" descriptor: \"%s\"\n", identifier.descriptor.string()); 935 ALOGV(" driver: v%d.%d.%d\n", 936 driverVersion >> 16, (driverVersion >> 8) & 0xff, driverVersion & 0xff); 937 938 // Load the configuration file for the device. 939 loadConfigurationLocked(device); 940 941 // Figure out the kinds of events the device reports. 942 ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(device->keyBitmask)), device->keyBitmask); 943 ioctl(fd, EVIOCGBIT(EV_ABS, sizeof(device->absBitmask)), device->absBitmask); 944 ioctl(fd, EVIOCGBIT(EV_REL, sizeof(device->relBitmask)), device->relBitmask); 945 ioctl(fd, EVIOCGBIT(EV_SW, sizeof(device->swBitmask)), device->swBitmask); 946 ioctl(fd, EVIOCGBIT(EV_LED, sizeof(device->ledBitmask)), device->ledBitmask); 947 ioctl(fd, EVIOCGPROP(sizeof(device->propBitmask)), device->propBitmask); 948 949 // See if this is a keyboard. Ignore everything in the button range except for 950 // joystick and gamepad buttons which are handled like keyboards for the most part. 951 bool haveKeyboardKeys = containsNonZeroByte(device->keyBitmask, 0, sizeof_bit_array(BTN_MISC)) 952 || containsNonZeroByte(device->keyBitmask, sizeof_bit_array(KEY_OK), 953 sizeof_bit_array(KEY_MAX + 1)); 954 bool haveGamepadButtons = containsNonZeroByte(device->keyBitmask, sizeof_bit_array(BTN_MISC), 955 sizeof_bit_array(BTN_MOUSE)) 956 || containsNonZeroByte(device->keyBitmask, sizeof_bit_array(BTN_JOYSTICK), 957 sizeof_bit_array(BTN_DIGI)); 958 if (haveKeyboardKeys || haveGamepadButtons) { 959 device->classes |= INPUT_DEVICE_CLASS_KEYBOARD; 960 } 961 962 // See if this is a cursor device such as a trackball or mouse. 963 if (test_bit(BTN_MOUSE, device->keyBitmask) 964 && test_bit(REL_X, device->relBitmask) 965 && test_bit(REL_Y, device->relBitmask)) { 966 device->classes |= INPUT_DEVICE_CLASS_CURSOR; 967 } 968 969 // See if this is a touch pad. 970 // Is this a new modern multi-touch driver? 971 if (test_bit(ABS_MT_POSITION_X, device->absBitmask) 972 && test_bit(ABS_MT_POSITION_Y, device->absBitmask)) { 973 // Some joysticks such as the PS3 controller report axes that conflict 974 // with the ABS_MT range. Try to confirm that the device really is 975 // a touch screen. 976 if (test_bit(BTN_TOUCH, device->keyBitmask) || !haveGamepadButtons) { 977 device->classes |= INPUT_DEVICE_CLASS_TOUCH | INPUT_DEVICE_CLASS_TOUCH_MT; 978 } 979 // Is this an old style single-touch driver? 980 } else if (test_bit(BTN_TOUCH, device->keyBitmask) 981 && test_bit(ABS_X, device->absBitmask) 982 && test_bit(ABS_Y, device->absBitmask)) { 983 device->classes |= INPUT_DEVICE_CLASS_TOUCH; 984 } 985 986 // See if this device is a joystick. 987 // Assumes that joysticks always have gamepad buttons in order to distinguish them 988 // from other devices such as accelerometers that also have absolute axes. 989 if (haveGamepadButtons) { 990 uint32_t assumedClasses = device->classes | INPUT_DEVICE_CLASS_JOYSTICK; 991 for (int i = 0; i <= ABS_MAX; i++) { 992 if (test_bit(i, device->absBitmask) 993 && (getAbsAxisUsage(i, assumedClasses) & INPUT_DEVICE_CLASS_JOYSTICK)) { 994 device->classes = assumedClasses; 995 break; 996 } 997 } 998 } 999 1000 // Check whether this device has switches. 1001 for (int i = 0; i <= SW_MAX; i++) { 1002 if (test_bit(i, device->swBitmask)) { 1003 device->classes |= INPUT_DEVICE_CLASS_SWITCH; 1004 break; 1005 } 1006 } 1007 1008 // Configure virtual keys. 1009 if ((device->classes & INPUT_DEVICE_CLASS_TOUCH)) { 1010 // Load the virtual keys for the touch screen, if any. 1011 // We do this now so that we can make sure to load the keymap if necessary. 1012 status_t status = loadVirtualKeyMapLocked(device); 1013 if (!status) { 1014 device->classes |= INPUT_DEVICE_CLASS_KEYBOARD; 1015 } 1016 } 1017 1018 // Load the key map. 1019 // We need to do this for joysticks too because the key layout may specify axes. 1020 status_t keyMapStatus = NAME_NOT_FOUND; 1021 if (device->classes & (INPUT_DEVICE_CLASS_KEYBOARD | INPUT_DEVICE_CLASS_JOYSTICK)) { 1022 // Load the keymap for the device. 1023 keyMapStatus = loadKeyMapLocked(device); 1024 } 1025 1026 // Configure the keyboard, gamepad or virtual keyboard. 1027 if (device->classes & INPUT_DEVICE_CLASS_KEYBOARD) { 1028 // Register the keyboard as a built-in keyboard if it is eligible. 1029 if (!keyMapStatus 1030 && mBuiltInKeyboardId == NO_BUILT_IN_KEYBOARD 1031 && isEligibleBuiltInKeyboard(device->identifier, 1032 device->configuration, &device->keyMap)) { 1033 mBuiltInKeyboardId = device->id; 1034 } 1035 1036 // 'Q' key support = cheap test of whether this is an alpha-capable kbd 1037 if (hasKeycodeLocked(device, AKEYCODE_Q)) { 1038 device->classes |= INPUT_DEVICE_CLASS_ALPHAKEY; 1039 } 1040 1041 // See if this device has a DPAD. 1042 if (hasKeycodeLocked(device, AKEYCODE_DPAD_UP) && 1043 hasKeycodeLocked(device, AKEYCODE_DPAD_DOWN) && 1044 hasKeycodeLocked(device, AKEYCODE_DPAD_LEFT) && 1045 hasKeycodeLocked(device, AKEYCODE_DPAD_RIGHT) && 1046 hasKeycodeLocked(device, AKEYCODE_DPAD_CENTER)) { 1047 device->classes |= INPUT_DEVICE_CLASS_DPAD; 1048 } 1049 1050 // See if this device has a gamepad. 1051 for (size_t i = 0; i < sizeof(GAMEPAD_KEYCODES)/sizeof(GAMEPAD_KEYCODES[0]); i++) { 1052 if (hasKeycodeLocked(device, GAMEPAD_KEYCODES[i])) { 1053 device->classes |= INPUT_DEVICE_CLASS_GAMEPAD; 1054 break; 1055 } 1056 } 1057 } 1058 1059 // If the device isn't recognized as something we handle, don't monitor it. 1060 if (device->classes == 0) { 1061 ALOGV("Dropping device: id=%d, path='%s', name='%s'", 1062 deviceId, devicePath, device->identifier.name.string()); 1063 delete device; 1064 return -1; 1065 } 1066 1067 // Determine whether the device is external or internal. 1068 if (isExternalDeviceLocked(device)) { 1069 device->classes |= INPUT_DEVICE_CLASS_EXTERNAL; 1070 } 1071 1072 // Register with epoll. 1073 struct epoll_event eventItem; 1074 memset(&eventItem, 0, sizeof(eventItem)); 1075 eventItem.events = EPOLLIN; 1076 eventItem.data.u32 = deviceId; 1077 if (epoll_ctl(mEpollFd, EPOLL_CTL_ADD, fd, &eventItem)) { 1078 ALOGE("Could not add device fd to epoll instance. errno=%d", errno); 1079 delete device; 1080 return -1; 1081 } 1082 1083 // Enable wake-lock behavior on kernels that support it. 1084 // TODO: Only need this for devices that can really wake the system. 1085 bool usingSuspendBlockIoctl = !ioctl(fd, EVIOCSSUSPENDBLOCK, 1); 1086 1087 // Tell the kernel that we want to use the monotonic clock for reporting timestamps 1088 // associated with input events. This is important because the input system 1089 // uses the timestamps extensively and assumes they were recorded using the monotonic 1090 // clock. 1091 // 1092 // In older kernel, before Linux 3.4, there was no way to tell the kernel which 1093 // clock to use to input event timestamps. The standard kernel behavior was to 1094 // record a real time timestamp, which isn't what we want. Android kernels therefore 1095 // contained a patch to the evdev_event() function in drivers/input/evdev.c to 1096 // replace the call to do_gettimeofday() with ktime_get_ts() to cause the monotonic 1097 // clock to be used instead of the real time clock. 1098 // 1099 // As of Linux 3.4, there is a new EVIOCSCLOCKID ioctl to set the desired clock. 1100 // Therefore, we no longer require the Android-specific kernel patch described above 1101 // as long as we make sure to set select the monotonic clock. We do that here. 1102 bool usingClockIoctl = !ioctl(fd, EVIOCSCLOCKID, CLOCK_MONOTONIC); 1103 1104 ALOGI("New device: id=%d, fd=%d, path='%s', name='%s', classes=0x%x, " 1105 "configuration='%s', keyLayout='%s', keyCharacterMap='%s', builtinKeyboard=%s, " 1106 "usingSuspendBlockIoctl=%s, usingClockIoctl=%s", 1107 deviceId, fd, devicePath, device->identifier.name.string(), 1108 device->classes, 1109 device->configurationFile.string(), 1110 device->keyMap.keyLayoutFile.string(), 1111 device->keyMap.keyCharacterMapFile.string(), 1112 toString(mBuiltInKeyboardId == deviceId), 1113 toString(usingSuspendBlockIoctl), toString(usingClockIoctl)); 1114 1115 addDeviceLocked(device); 1116 return 0; 1117} 1118 1119void EventHub::createVirtualKeyboardLocked() { 1120 InputDeviceIdentifier identifier; 1121 identifier.name = "Virtual"; 1122 identifier.uniqueId = "<virtual>"; 1123 setDescriptor(identifier); 1124 1125 Device* device = new Device(-1, VIRTUAL_KEYBOARD_ID, String8("<virtual>"), identifier); 1126 device->classes = INPUT_DEVICE_CLASS_KEYBOARD 1127 | INPUT_DEVICE_CLASS_ALPHAKEY 1128 | INPUT_DEVICE_CLASS_DPAD 1129 | INPUT_DEVICE_CLASS_VIRTUAL; 1130 loadKeyMapLocked(device); 1131 addDeviceLocked(device); 1132} 1133 1134void EventHub::addDeviceLocked(Device* device) { 1135 mDevices.add(device->id, device); 1136 device->next = mOpeningDevices; 1137 mOpeningDevices = device; 1138} 1139 1140void EventHub::loadConfigurationLocked(Device* device) { 1141 device->configurationFile = getInputDeviceConfigurationFilePathByDeviceIdentifier( 1142 device->identifier, INPUT_DEVICE_CONFIGURATION_FILE_TYPE_CONFIGURATION); 1143 if (device->configurationFile.isEmpty()) { 1144 ALOGD("No input device configuration file found for device '%s'.", 1145 device->identifier.name.string()); 1146 } else { 1147 status_t status = PropertyMap::load(device->configurationFile, 1148 &device->configuration); 1149 if (status) { 1150 ALOGE("Error loading input device configuration file for device '%s'. " 1151 "Using default configuration.", 1152 device->identifier.name.string()); 1153 } 1154 } 1155} 1156 1157status_t EventHub::loadVirtualKeyMapLocked(Device* device) { 1158 // The virtual key map is supplied by the kernel as a system board property file. 1159 String8 path; 1160 path.append("/sys/board_properties/virtualkeys."); 1161 path.append(device->identifier.name); 1162 if (access(path.string(), R_OK)) { 1163 return NAME_NOT_FOUND; 1164 } 1165 return VirtualKeyMap::load(path, &device->virtualKeyMap); 1166} 1167 1168status_t EventHub::loadKeyMapLocked(Device* device) { 1169 return device->keyMap.load(device->identifier, device->configuration); 1170} 1171 1172bool EventHub::isExternalDeviceLocked(Device* device) { 1173 if (device->configuration) { 1174 bool value; 1175 if (device->configuration->tryGetProperty(String8("device.internal"), value)) { 1176 return !value; 1177 } 1178 } 1179 return device->identifier.bus == BUS_USB || device->identifier.bus == BUS_BLUETOOTH; 1180} 1181 1182bool EventHub::hasKeycodeLocked(Device* device, int keycode) const { 1183 if (!device->keyMap.haveKeyLayout() || !device->keyBitmask) { 1184 return false; 1185 } 1186 1187 Vector<int32_t> scanCodes; 1188 device->keyMap.keyLayoutMap->findScanCodesForKey(keycode, &scanCodes); 1189 const size_t N = scanCodes.size(); 1190 for (size_t i=0; i<N && i<=KEY_MAX; i++) { 1191 int32_t sc = scanCodes.itemAt(i); 1192 if (sc >= 0 && sc <= KEY_MAX && test_bit(sc, device->keyBitmask)) { 1193 return true; 1194 } 1195 } 1196 1197 return false; 1198} 1199 1200status_t EventHub::closeDeviceByPathLocked(const char *devicePath) { 1201 Device* device = getDeviceByPathLocked(devicePath); 1202 if (device) { 1203 closeDeviceLocked(device); 1204 return 0; 1205 } 1206 ALOGV("Remove device: %s not found, device may already have been removed.", devicePath); 1207 return -1; 1208} 1209 1210void EventHub::closeAllDevicesLocked() { 1211 while (mDevices.size() > 0) { 1212 closeDeviceLocked(mDevices.valueAt(mDevices.size() - 1)); 1213 } 1214} 1215 1216void EventHub::closeDeviceLocked(Device* device) { 1217 ALOGI("Removed device: path=%s name=%s id=%d fd=%d classes=0x%x\n", 1218 device->path.string(), device->identifier.name.string(), device->id, 1219 device->fd, device->classes); 1220 1221 if (device->id == mBuiltInKeyboardId) { 1222 ALOGW("built-in keyboard device %s (id=%d) is closing! the apps will not like this", 1223 device->path.string(), mBuiltInKeyboardId); 1224 mBuiltInKeyboardId = NO_BUILT_IN_KEYBOARD; 1225 } 1226 1227 if (!device->isVirtual()) { 1228 if (epoll_ctl(mEpollFd, EPOLL_CTL_DEL, device->fd, NULL)) { 1229 ALOGW("Could not remove device fd from epoll instance. errno=%d", errno); 1230 } 1231 } 1232 1233 mDevices.removeItem(device->id); 1234 device->close(); 1235 1236 // Unlink for opening devices list if it is present. 1237 Device* pred = NULL; 1238 bool found = false; 1239 for (Device* entry = mOpeningDevices; entry != NULL; ) { 1240 if (entry == device) { 1241 found = true; 1242 break; 1243 } 1244 pred = entry; 1245 entry = entry->next; 1246 } 1247 if (found) { 1248 // Unlink the device from the opening devices list then delete it. 1249 // We don't need to tell the client that the device was closed because 1250 // it does not even know it was opened in the first place. 1251 ALOGI("Device %s was immediately closed after opening.", device->path.string()); 1252 if (pred) { 1253 pred->next = device->next; 1254 } else { 1255 mOpeningDevices = device->next; 1256 } 1257 delete device; 1258 } else { 1259 // Link into closing devices list. 1260 // The device will be deleted later after we have informed the client. 1261 device->next = mClosingDevices; 1262 mClosingDevices = device; 1263 } 1264} 1265 1266status_t EventHub::readNotifyLocked() { 1267 int res; 1268 char devname[PATH_MAX]; 1269 char *filename; 1270 char event_buf[512]; 1271 int event_size; 1272 int event_pos = 0; 1273 struct inotify_event *event; 1274 1275 ALOGV("EventHub::readNotify nfd: %d\n", mINotifyFd); 1276 res = read(mINotifyFd, event_buf, sizeof(event_buf)); 1277 if(res < (int)sizeof(*event)) { 1278 if(errno == EINTR) 1279 return 0; 1280 ALOGW("could not get event, %s\n", strerror(errno)); 1281 return -1; 1282 } 1283 //printf("got %d bytes of event information\n", res); 1284 1285 strcpy(devname, DEVICE_PATH); 1286 filename = devname + strlen(devname); 1287 *filename++ = '/'; 1288 1289 while(res >= (int)sizeof(*event)) { 1290 event = (struct inotify_event *)(event_buf + event_pos); 1291 //printf("%d: %08x \"%s\"\n", event->wd, event->mask, event->len ? event->name : ""); 1292 if(event->len) { 1293 strcpy(filename, event->name); 1294 if(event->mask & IN_CREATE) { 1295 openDeviceLocked(devname); 1296 } else { 1297 ALOGI("Removing device '%s' due to inotify event\n", devname); 1298 closeDeviceByPathLocked(devname); 1299 } 1300 } 1301 event_size = sizeof(*event) + event->len; 1302 res -= event_size; 1303 event_pos += event_size; 1304 } 1305 return 0; 1306} 1307 1308status_t EventHub::scanDirLocked(const char *dirname) 1309{ 1310 char devname[PATH_MAX]; 1311 char *filename; 1312 DIR *dir; 1313 struct dirent *de; 1314 dir = opendir(dirname); 1315 if(dir == NULL) 1316 return -1; 1317 strcpy(devname, dirname); 1318 filename = devname + strlen(devname); 1319 *filename++ = '/'; 1320 while((de = readdir(dir))) { 1321 if(de->d_name[0] == '.' && 1322 (de->d_name[1] == '\0' || 1323 (de->d_name[1] == '.' && de->d_name[2] == '\0'))) 1324 continue; 1325 strcpy(filename, de->d_name); 1326 openDeviceLocked(devname); 1327 } 1328 closedir(dir); 1329 return 0; 1330} 1331 1332void EventHub::requestReopenDevices() { 1333 ALOGV("requestReopenDevices() called"); 1334 1335 AutoMutex _l(mLock); 1336 mNeedToReopenDevices = true; 1337} 1338 1339void EventHub::dump(String8& dump) { 1340 dump.append("Event Hub State:\n"); 1341 1342 { // acquire lock 1343 AutoMutex _l(mLock); 1344 1345 dump.appendFormat(INDENT "BuiltInKeyboardId: %d\n", mBuiltInKeyboardId); 1346 1347 dump.append(INDENT "Devices:\n"); 1348 1349 for (size_t i = 0; i < mDevices.size(); i++) { 1350 const Device* device = mDevices.valueAt(i); 1351 if (mBuiltInKeyboardId == device->id) { 1352 dump.appendFormat(INDENT2 "%d: %s (aka device 0 - built-in keyboard)\n", 1353 device->id, device->identifier.name.string()); 1354 } else { 1355 dump.appendFormat(INDENT2 "%d: %s\n", device->id, 1356 device->identifier.name.string()); 1357 } 1358 dump.appendFormat(INDENT3 "Classes: 0x%08x\n", device->classes); 1359 dump.appendFormat(INDENT3 "Path: %s\n", device->path.string()); 1360 dump.appendFormat(INDENT3 "Descriptor: %s\n", device->identifier.descriptor.string()); 1361 dump.appendFormat(INDENT3 "Location: %s\n", device->identifier.location.string()); 1362 dump.appendFormat(INDENT3 "UniqueId: %s\n", device->identifier.uniqueId.string()); 1363 dump.appendFormat(INDENT3 "Identifier: bus=0x%04x, vendor=0x%04x, " 1364 "product=0x%04x, version=0x%04x\n", 1365 device->identifier.bus, device->identifier.vendor, 1366 device->identifier.product, device->identifier.version); 1367 dump.appendFormat(INDENT3 "KeyLayoutFile: %s\n", 1368 device->keyMap.keyLayoutFile.string()); 1369 dump.appendFormat(INDENT3 "KeyCharacterMapFile: %s\n", 1370 device->keyMap.keyCharacterMapFile.string()); 1371 dump.appendFormat(INDENT3 "ConfigurationFile: %s\n", 1372 device->configurationFile.string()); 1373 } 1374 } // release lock 1375} 1376 1377void EventHub::monitor() { 1378 // Acquire and release the lock to ensure that the event hub has not deadlocked. 1379 mLock.lock(); 1380 mLock.unlock(); 1381} 1382 1383 1384}; // namespace android 1385