EventHub.cpp revision ac72bbf4e46d6689070df09a25db2960a9036eb2
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#include <assert.h> 18#include <dirent.h> 19#include <errno.h> 20#include <fcntl.h> 21#include <inttypes.h> 22#include <memory.h> 23#include <stdint.h> 24#include <stdio.h> 25#include <stdlib.h> 26#include <string.h> 27#include <sys/epoll.h> 28#include <sys/limits.h> 29#include <sys/inotify.h> 30#include <sys/ioctl.h> 31#include <sys/utsname.h> 32#include <unistd.h> 33 34#define LOG_TAG "EventHub" 35 36// #define LOG_NDEBUG 0 37 38#include "EventHub.h" 39 40#include <hardware_legacy/power.h> 41 42#include <cutils/properties.h> 43#include <openssl/sha.h> 44#include <utils/Log.h> 45#include <utils/Timers.h> 46#include <utils/threads.h> 47#include <utils/Errors.h> 48 49#include <input/KeyLayoutMap.h> 50#include <input/KeyCharacterMap.h> 51#include <input/VirtualKeyMap.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 SHA_CTX ctx; 84 SHA1_Init(&ctx); 85 SHA1_Update(&ctx, reinterpret_cast<const u_char*>(in.string()), in.size()); 86 u_char digest[SHA_DIGEST_LENGTH]; 87 SHA1_Final(digest, &ctx); 88 89 String8 out; 90 for (size_t i = 0; i < SHA_DIGEST_LENGTH; i++) { 91 out.appendFormat("%02x", digest[i]); 92 } 93 return out; 94} 95 96static void getLinuxRelease(int* major, int* minor) { 97 struct utsname info; 98 if (uname(&info) || sscanf(info.release, "%d.%d", major, minor) <= 0) { 99 *major = 0, *minor = 0; 100 ALOGE("Could not get linux version: %s", strerror(errno)); 101 } 102} 103 104// --- Global Functions --- 105 106uint32_t getAbsAxisUsage(int32_t axis, uint32_t deviceClasses) { 107 // Touch devices get dibs on touch-related axes. 108 if (deviceClasses & INPUT_DEVICE_CLASS_TOUCH) { 109 switch (axis) { 110 case ABS_X: 111 case ABS_Y: 112 case ABS_PRESSURE: 113 case ABS_TOOL_WIDTH: 114 case ABS_DISTANCE: 115 case ABS_TILT_X: 116 case ABS_TILT_Y: 117 case ABS_MT_SLOT: 118 case ABS_MT_TOUCH_MAJOR: 119 case ABS_MT_TOUCH_MINOR: 120 case ABS_MT_WIDTH_MAJOR: 121 case ABS_MT_WIDTH_MINOR: 122 case ABS_MT_ORIENTATION: 123 case ABS_MT_POSITION_X: 124 case ABS_MT_POSITION_Y: 125 case ABS_MT_TOOL_TYPE: 126 case ABS_MT_BLOB_ID: 127 case ABS_MT_TRACKING_ID: 128 case ABS_MT_PRESSURE: 129 case ABS_MT_DISTANCE: 130 return INPUT_DEVICE_CLASS_TOUCH; 131 } 132 } 133 134 // External stylus gets the pressure axis 135 if (deviceClasses & INPUT_DEVICE_CLASS_EXTERNAL_STYLUS) { 136 if (axis == ABS_PRESSURE) { 137 return INPUT_DEVICE_CLASS_EXTERNAL_STYLUS; 138 } 139 } 140 141 // Joystick devices get the rest. 142 return deviceClasses & INPUT_DEVICE_CLASS_JOYSTICK; 143} 144 145// --- EventHub::Device --- 146 147EventHub::Device::Device(int fd, int32_t id, const String8& path, 148 const InputDeviceIdentifier& identifier) : 149 next(NULL), 150 fd(fd), id(id), path(path), identifier(identifier), 151 classes(0), configuration(NULL), virtualKeyMap(NULL), 152 ffEffectPlaying(false), ffEffectId(-1), controllerNumber(0), 153 timestampOverrideSec(0), timestampOverrideUsec(0) { 154 memset(keyBitmask, 0, sizeof(keyBitmask)); 155 memset(absBitmask, 0, sizeof(absBitmask)); 156 memset(relBitmask, 0, sizeof(relBitmask)); 157 memset(swBitmask, 0, sizeof(swBitmask)); 158 memset(ledBitmask, 0, sizeof(ledBitmask)); 159 memset(ffBitmask, 0, sizeof(ffBitmask)); 160 memset(propBitmask, 0, sizeof(propBitmask)); 161} 162 163EventHub::Device::~Device() { 164 close(); 165 delete configuration; 166 delete virtualKeyMap; 167} 168 169void EventHub::Device::close() { 170 if (fd >= 0) { 171 ::close(fd); 172 fd = -1; 173 } 174} 175 176 177// --- EventHub --- 178 179const uint32_t EventHub::EPOLL_ID_INOTIFY; 180const uint32_t EventHub::EPOLL_ID_WAKE; 181const int EventHub::EPOLL_SIZE_HINT; 182const int EventHub::EPOLL_MAX_EVENTS; 183 184EventHub::EventHub(void) : 185 mBuiltInKeyboardId(NO_BUILT_IN_KEYBOARD), mNextDeviceId(1), mControllerNumbers(), 186 mOpeningDevices(0), mClosingDevices(0), 187 mNeedToSendFinishedDeviceScan(false), 188 mNeedToReopenDevices(false), mNeedToScanDevices(true), 189 mPendingEventCount(0), mPendingEventIndex(0), mPendingINotify(false) { 190 acquire_wake_lock(PARTIAL_WAKE_LOCK, WAKE_LOCK_ID); 191 192 mEpollFd = epoll_create(EPOLL_SIZE_HINT); 193 LOG_ALWAYS_FATAL_IF(mEpollFd < 0, "Could not create epoll instance. errno=%d", errno); 194 195 mINotifyFd = inotify_init(); 196 int result = inotify_add_watch(mINotifyFd, DEVICE_PATH, IN_DELETE | IN_CREATE); 197 LOG_ALWAYS_FATAL_IF(result < 0, "Could not register INotify for %s. errno=%d", 198 DEVICE_PATH, errno); 199 200 struct epoll_event eventItem; 201 memset(&eventItem, 0, sizeof(eventItem)); 202 eventItem.events = EPOLLIN; 203 eventItem.data.u32 = EPOLL_ID_INOTIFY; 204 result = epoll_ctl(mEpollFd, EPOLL_CTL_ADD, mINotifyFd, &eventItem); 205 LOG_ALWAYS_FATAL_IF(result != 0, "Could not add INotify to epoll instance. errno=%d", errno); 206 207 int wakeFds[2]; 208 result = pipe(wakeFds); 209 LOG_ALWAYS_FATAL_IF(result != 0, "Could not create wake pipe. errno=%d", errno); 210 211 mWakeReadPipeFd = wakeFds[0]; 212 mWakeWritePipeFd = wakeFds[1]; 213 214 result = fcntl(mWakeReadPipeFd, F_SETFL, O_NONBLOCK); 215 LOG_ALWAYS_FATAL_IF(result != 0, "Could not make wake read pipe non-blocking. errno=%d", 216 errno); 217 218 result = fcntl(mWakeWritePipeFd, F_SETFL, O_NONBLOCK); 219 LOG_ALWAYS_FATAL_IF(result != 0, "Could not make wake write pipe non-blocking. errno=%d", 220 errno); 221 222 eventItem.data.u32 = EPOLL_ID_WAKE; 223 result = epoll_ctl(mEpollFd, EPOLL_CTL_ADD, mWakeReadPipeFd, &eventItem); 224 LOG_ALWAYS_FATAL_IF(result != 0, "Could not add wake read pipe to epoll instance. errno=%d", 225 errno); 226 227 int major, minor; 228 getLinuxRelease(&major, &minor); 229 // EPOLLWAKEUP was introduced in kernel 3.5 230 mUsingEpollWakeup = major > 3 || (major == 3 && minor >= 5); 231} 232 233EventHub::~EventHub(void) { 234 closeAllDevicesLocked(); 235 236 while (mClosingDevices) { 237 Device* device = mClosingDevices; 238 mClosingDevices = device->next; 239 delete device; 240 } 241 242 ::close(mEpollFd); 243 ::close(mINotifyFd); 244 ::close(mWakeReadPipeFd); 245 ::close(mWakeWritePipeFd); 246 247 release_wake_lock(WAKE_LOCK_ID); 248} 249 250InputDeviceIdentifier EventHub::getDeviceIdentifier(int32_t deviceId) const { 251 AutoMutex _l(mLock); 252 Device* device = getDeviceLocked(deviceId); 253 if (device == NULL) return InputDeviceIdentifier(); 254 return device->identifier; 255} 256 257uint32_t EventHub::getDeviceClasses(int32_t deviceId) const { 258 AutoMutex _l(mLock); 259 Device* device = getDeviceLocked(deviceId); 260 if (device == NULL) return 0; 261 return device->classes; 262} 263 264int32_t EventHub::getDeviceControllerNumber(int32_t deviceId) const { 265 AutoMutex _l(mLock); 266 Device* device = getDeviceLocked(deviceId); 267 if (device == NULL) return 0; 268 return device->controllerNumber; 269} 270 271void EventHub::getConfiguration(int32_t deviceId, PropertyMap* outConfiguration) const { 272 AutoMutex _l(mLock); 273 Device* device = getDeviceLocked(deviceId); 274 if (device && device->configuration) { 275 *outConfiguration = *device->configuration; 276 } else { 277 outConfiguration->clear(); 278 } 279} 280 281status_t EventHub::getAbsoluteAxisInfo(int32_t deviceId, int axis, 282 RawAbsoluteAxisInfo* outAxisInfo) const { 283 outAxisInfo->clear(); 284 285 if (axis >= 0 && axis <= ABS_MAX) { 286 AutoMutex _l(mLock); 287 288 Device* device = getDeviceLocked(deviceId); 289 if (device && !device->isVirtual() && test_bit(axis, device->absBitmask)) { 290 struct input_absinfo info; 291 if(ioctl(device->fd, EVIOCGABS(axis), &info)) { 292 ALOGW("Error reading absolute controller %d for device %s fd %d, errno=%d", 293 axis, device->identifier.name.string(), device->fd, errno); 294 return -errno; 295 } 296 297 if (info.minimum != info.maximum) { 298 outAxisInfo->valid = true; 299 outAxisInfo->minValue = info.minimum; 300 outAxisInfo->maxValue = info.maximum; 301 outAxisInfo->flat = info.flat; 302 outAxisInfo->fuzz = info.fuzz; 303 outAxisInfo->resolution = info.resolution; 304 } 305 return OK; 306 } 307 } 308 return -1; 309} 310 311bool EventHub::hasRelativeAxis(int32_t deviceId, int axis) const { 312 if (axis >= 0 && axis <= REL_MAX) { 313 AutoMutex _l(mLock); 314 315 Device* device = getDeviceLocked(deviceId); 316 if (device) { 317 return test_bit(axis, device->relBitmask); 318 } 319 } 320 return false; 321} 322 323bool EventHub::hasInputProperty(int32_t deviceId, int property) const { 324 if (property >= 0 && property <= INPUT_PROP_MAX) { 325 AutoMutex _l(mLock); 326 327 Device* device = getDeviceLocked(deviceId); 328 if (device) { 329 return test_bit(property, device->propBitmask); 330 } 331 } 332 return false; 333} 334 335int32_t EventHub::getScanCodeState(int32_t deviceId, int32_t scanCode) const { 336 if (scanCode >= 0 && scanCode <= KEY_MAX) { 337 AutoMutex _l(mLock); 338 339 Device* device = getDeviceLocked(deviceId); 340 if (device && !device->isVirtual() && test_bit(scanCode, device->keyBitmask)) { 341 uint8_t keyState[sizeof_bit_array(KEY_MAX + 1)]; 342 memset(keyState, 0, sizeof(keyState)); 343 if (ioctl(device->fd, EVIOCGKEY(sizeof(keyState)), keyState) >= 0) { 344 return test_bit(scanCode, keyState) ? AKEY_STATE_DOWN : AKEY_STATE_UP; 345 } 346 } 347 } 348 return AKEY_STATE_UNKNOWN; 349} 350 351int32_t EventHub::getKeyCodeState(int32_t deviceId, int32_t keyCode) const { 352 AutoMutex _l(mLock); 353 354 Device* device = getDeviceLocked(deviceId); 355 if (device && !device->isVirtual() && device->keyMap.haveKeyLayout()) { 356 Vector<int32_t> scanCodes; 357 device->keyMap.keyLayoutMap->findScanCodesForKey(keyCode, &scanCodes); 358 if (scanCodes.size() != 0) { 359 uint8_t keyState[sizeof_bit_array(KEY_MAX + 1)]; 360 memset(keyState, 0, sizeof(keyState)); 361 if (ioctl(device->fd, EVIOCGKEY(sizeof(keyState)), keyState) >= 0) { 362 for (size_t i = 0; i < scanCodes.size(); i++) { 363 int32_t sc = scanCodes.itemAt(i); 364 if (sc >= 0 && sc <= KEY_MAX && test_bit(sc, keyState)) { 365 return AKEY_STATE_DOWN; 366 } 367 } 368 return AKEY_STATE_UP; 369 } 370 } 371 } 372 return AKEY_STATE_UNKNOWN; 373} 374 375int32_t EventHub::getSwitchState(int32_t deviceId, int32_t sw) const { 376 if (sw >= 0 && sw <= SW_MAX) { 377 AutoMutex _l(mLock); 378 379 Device* device = getDeviceLocked(deviceId); 380 if (device && !device->isVirtual() && test_bit(sw, device->swBitmask)) { 381 uint8_t swState[sizeof_bit_array(SW_MAX + 1)]; 382 memset(swState, 0, sizeof(swState)); 383 if (ioctl(device->fd, EVIOCGSW(sizeof(swState)), swState) >= 0) { 384 return test_bit(sw, swState) ? AKEY_STATE_DOWN : AKEY_STATE_UP; 385 } 386 } 387 } 388 return AKEY_STATE_UNKNOWN; 389} 390 391status_t EventHub::getAbsoluteAxisValue(int32_t deviceId, int32_t axis, int32_t* outValue) const { 392 *outValue = 0; 393 394 if (axis >= 0 && axis <= ABS_MAX) { 395 AutoMutex _l(mLock); 396 397 Device* device = getDeviceLocked(deviceId); 398 if (device && !device->isVirtual() && test_bit(axis, device->absBitmask)) { 399 struct input_absinfo info; 400 if(ioctl(device->fd, EVIOCGABS(axis), &info)) { 401 ALOGW("Error reading absolute controller %d for device %s fd %d, errno=%d", 402 axis, device->identifier.name.string(), device->fd, errno); 403 return -errno; 404 } 405 406 *outValue = info.value; 407 return OK; 408 } 409 } 410 return -1; 411} 412 413bool EventHub::markSupportedKeyCodes(int32_t deviceId, size_t numCodes, 414 const int32_t* keyCodes, uint8_t* outFlags) const { 415 AutoMutex _l(mLock); 416 417 Device* device = getDeviceLocked(deviceId); 418 if (device && device->keyMap.haveKeyLayout()) { 419 Vector<int32_t> scanCodes; 420 for (size_t codeIndex = 0; codeIndex < numCodes; codeIndex++) { 421 scanCodes.clear(); 422 423 status_t err = device->keyMap.keyLayoutMap->findScanCodesForKey( 424 keyCodes[codeIndex], &scanCodes); 425 if (! err) { 426 // check the possible scan codes identified by the layout map against the 427 // map of codes actually emitted by the driver 428 for (size_t sc = 0; sc < scanCodes.size(); sc++) { 429 if (test_bit(scanCodes[sc], device->keyBitmask)) { 430 outFlags[codeIndex] = 1; 431 break; 432 } 433 } 434 } 435 } 436 return true; 437 } 438 return false; 439} 440 441status_t EventHub::mapKey(int32_t deviceId, int32_t scanCode, int32_t usageCode, 442 int32_t* outKeycode, uint32_t* outFlags) const { 443 AutoMutex _l(mLock); 444 Device* device = getDeviceLocked(deviceId); 445 446 if (device) { 447 // Check the key character map first. 448 sp<KeyCharacterMap> kcm = device->getKeyCharacterMap(); 449 if (kcm != NULL) { 450 if (!kcm->mapKey(scanCode, usageCode, outKeycode)) { 451 *outFlags = 0; 452 return NO_ERROR; 453 } 454 } 455 456 // Check the key layout next. 457 if (device->keyMap.haveKeyLayout()) { 458 if (!device->keyMap.keyLayoutMap->mapKey( 459 scanCode, usageCode, outKeycode, outFlags)) { 460 return NO_ERROR; 461 } 462 } 463 } 464 465 *outKeycode = 0; 466 *outFlags = 0; 467 return NAME_NOT_FOUND; 468} 469 470status_t EventHub::mapAxis(int32_t deviceId, int32_t scanCode, AxisInfo* outAxisInfo) const { 471 AutoMutex _l(mLock); 472 Device* device = getDeviceLocked(deviceId); 473 474 if (device && device->keyMap.haveKeyLayout()) { 475 status_t err = device->keyMap.keyLayoutMap->mapAxis(scanCode, outAxisInfo); 476 if (err == NO_ERROR) { 477 return NO_ERROR; 478 } 479 } 480 481 return NAME_NOT_FOUND; 482} 483 484void EventHub::setExcludedDevices(const Vector<String8>& devices) { 485 AutoMutex _l(mLock); 486 487 mExcludedDevices = devices; 488} 489 490bool EventHub::hasScanCode(int32_t deviceId, int32_t scanCode) const { 491 AutoMutex _l(mLock); 492 Device* device = getDeviceLocked(deviceId); 493 if (device && scanCode >= 0 && scanCode <= KEY_MAX) { 494 if (test_bit(scanCode, device->keyBitmask)) { 495 return true; 496 } 497 } 498 return false; 499} 500 501bool EventHub::hasLed(int32_t deviceId, int32_t led) const { 502 AutoMutex _l(mLock); 503 Device* device = getDeviceLocked(deviceId); 504 int32_t sc; 505 if (device && mapLed(device, led, &sc) == NO_ERROR) { 506 if (test_bit(sc, device->ledBitmask)) { 507 return true; 508 } 509 } 510 return false; 511} 512 513void EventHub::setLedState(int32_t deviceId, int32_t led, bool on) { 514 AutoMutex _l(mLock); 515 Device* device = getDeviceLocked(deviceId); 516 setLedStateLocked(device, led, on); 517} 518 519void EventHub::setLedStateLocked(Device* device, int32_t led, bool on) { 520 int32_t sc; 521 if (device && !device->isVirtual() && mapLed(device, led, &sc) != NAME_NOT_FOUND) { 522 struct input_event ev; 523 ev.time.tv_sec = 0; 524 ev.time.tv_usec = 0; 525 ev.type = EV_LED; 526 ev.code = sc; 527 ev.value = on ? 1 : 0; 528 529 ssize_t nWrite; 530 do { 531 nWrite = write(device->fd, &ev, sizeof(struct input_event)); 532 } while (nWrite == -1 && errno == EINTR); 533 } 534} 535 536void EventHub::getVirtualKeyDefinitions(int32_t deviceId, 537 Vector<VirtualKeyDefinition>& outVirtualKeys) const { 538 outVirtualKeys.clear(); 539 540 AutoMutex _l(mLock); 541 Device* device = getDeviceLocked(deviceId); 542 if (device && device->virtualKeyMap) { 543 outVirtualKeys.appendVector(device->virtualKeyMap->getVirtualKeys()); 544 } 545} 546 547sp<KeyCharacterMap> EventHub::getKeyCharacterMap(int32_t deviceId) const { 548 AutoMutex _l(mLock); 549 Device* device = getDeviceLocked(deviceId); 550 if (device) { 551 return device->getKeyCharacterMap(); 552 } 553 return NULL; 554} 555 556bool EventHub::setKeyboardLayoutOverlay(int32_t deviceId, 557 const sp<KeyCharacterMap>& map) { 558 AutoMutex _l(mLock); 559 Device* device = getDeviceLocked(deviceId); 560 if (device) { 561 if (map != device->overlayKeyMap) { 562 device->overlayKeyMap = map; 563 device->combinedKeyMap = KeyCharacterMap::combine( 564 device->keyMap.keyCharacterMap, map); 565 return true; 566 } 567 } 568 return false; 569} 570 571static String8 generateDescriptor(InputDeviceIdentifier& identifier) { 572 String8 rawDescriptor; 573 rawDescriptor.appendFormat(":%04x:%04x:", identifier.vendor, 574 identifier.product); 575 // TODO add handling for USB devices to not uniqueify kbs that show up twice 576 if (!identifier.uniqueId.isEmpty()) { 577 rawDescriptor.append("uniqueId:"); 578 rawDescriptor.append(identifier.uniqueId); 579 } else if (identifier.nonce != 0) { 580 rawDescriptor.appendFormat("nonce:%04x", identifier.nonce); 581 } 582 583 if (identifier.vendor == 0 && identifier.product == 0) { 584 // If we don't know the vendor and product id, then the device is probably 585 // built-in so we need to rely on other information to uniquely identify 586 // the input device. Usually we try to avoid relying on the device name or 587 // location but for built-in input device, they are unlikely to ever change. 588 if (!identifier.name.isEmpty()) { 589 rawDescriptor.append("name:"); 590 rawDescriptor.append(identifier.name); 591 } else if (!identifier.location.isEmpty()) { 592 rawDescriptor.append("location:"); 593 rawDescriptor.append(identifier.location); 594 } 595 } 596 identifier.descriptor = sha1(rawDescriptor); 597 return rawDescriptor; 598} 599 600void EventHub::assignDescriptorLocked(InputDeviceIdentifier& identifier) { 601 // Compute a device descriptor that uniquely identifies the device. 602 // The descriptor is assumed to be a stable identifier. Its value should not 603 // change between reboots, reconnections, firmware updates or new releases 604 // of Android. In practice we sometimes get devices that cannot be uniquely 605 // identified. In this case we enforce uniqueness between connected devices. 606 // Ideally, we also want the descriptor to be short and relatively opaque. 607 608 identifier.nonce = 0; 609 String8 rawDescriptor = generateDescriptor(identifier); 610 if (identifier.uniqueId.isEmpty()) { 611 // If it didn't have a unique id check for conflicts and enforce 612 // uniqueness if necessary. 613 while(getDeviceByDescriptorLocked(identifier.descriptor) != NULL) { 614 identifier.nonce++; 615 rawDescriptor = generateDescriptor(identifier); 616 } 617 } 618 ALOGV("Created descriptor: raw=%s, cooked=%s", rawDescriptor.string(), 619 identifier.descriptor.string()); 620} 621 622void EventHub::vibrate(int32_t deviceId, nsecs_t duration) { 623 AutoMutex _l(mLock); 624 Device* device = getDeviceLocked(deviceId); 625 if (device && !device->isVirtual()) { 626 ff_effect effect; 627 memset(&effect, 0, sizeof(effect)); 628 effect.type = FF_RUMBLE; 629 effect.id = device->ffEffectId; 630 effect.u.rumble.strong_magnitude = 0xc000; 631 effect.u.rumble.weak_magnitude = 0xc000; 632 effect.replay.length = (duration + 999999LL) / 1000000LL; 633 effect.replay.delay = 0; 634 if (ioctl(device->fd, EVIOCSFF, &effect)) { 635 ALOGW("Could not upload force feedback effect to device %s due to error %d.", 636 device->identifier.name.string(), errno); 637 return; 638 } 639 device->ffEffectId = effect.id; 640 641 struct input_event ev; 642 ev.time.tv_sec = 0; 643 ev.time.tv_usec = 0; 644 ev.type = EV_FF; 645 ev.code = device->ffEffectId; 646 ev.value = 1; 647 if (write(device->fd, &ev, sizeof(ev)) != sizeof(ev)) { 648 ALOGW("Could not start force feedback effect on device %s due to error %d.", 649 device->identifier.name.string(), errno); 650 return; 651 } 652 device->ffEffectPlaying = true; 653 } 654} 655 656void EventHub::cancelVibrate(int32_t deviceId) { 657 AutoMutex _l(mLock); 658 Device* device = getDeviceLocked(deviceId); 659 if (device && !device->isVirtual()) { 660 if (device->ffEffectPlaying) { 661 device->ffEffectPlaying = false; 662 663 struct input_event ev; 664 ev.time.tv_sec = 0; 665 ev.time.tv_usec = 0; 666 ev.type = EV_FF; 667 ev.code = device->ffEffectId; 668 ev.value = 0; 669 if (write(device->fd, &ev, sizeof(ev)) != sizeof(ev)) { 670 ALOGW("Could not stop force feedback effect on device %s due to error %d.", 671 device->identifier.name.string(), errno); 672 return; 673 } 674 } 675 } 676} 677 678EventHub::Device* EventHub::getDeviceByDescriptorLocked(String8& descriptor) const { 679 size_t size = mDevices.size(); 680 for (size_t i = 0; i < size; i++) { 681 Device* device = mDevices.valueAt(i); 682 if (descriptor.compare(device->identifier.descriptor) == 0) { 683 return device; 684 } 685 } 686 return NULL; 687} 688 689EventHub::Device* EventHub::getDeviceLocked(int32_t deviceId) const { 690 if (deviceId == BUILT_IN_KEYBOARD_ID) { 691 deviceId = mBuiltInKeyboardId; 692 } 693 ssize_t index = mDevices.indexOfKey(deviceId); 694 return index >= 0 ? mDevices.valueAt(index) : NULL; 695} 696 697EventHub::Device* EventHub::getDeviceByPathLocked(const char* devicePath) const { 698 for (size_t i = 0; i < mDevices.size(); i++) { 699 Device* device = mDevices.valueAt(i); 700 if (device->path == devicePath) { 701 return device; 702 } 703 } 704 return NULL; 705} 706 707size_t EventHub::getEvents(int timeoutMillis, RawEvent* buffer, size_t bufferSize) { 708 ALOG_ASSERT(bufferSize >= 1); 709 710 AutoMutex _l(mLock); 711 712 struct input_event readBuffer[bufferSize]; 713 714 RawEvent* event = buffer; 715 size_t capacity = bufferSize; 716 bool awoken = false; 717 for (;;) { 718 nsecs_t now = systemTime(SYSTEM_TIME_MONOTONIC); 719 720 // Reopen input devices if needed. 721 if (mNeedToReopenDevices) { 722 mNeedToReopenDevices = false; 723 724 ALOGI("Reopening all input devices due to a configuration change."); 725 726 closeAllDevicesLocked(); 727 mNeedToScanDevices = true; 728 break; // return to the caller before we actually rescan 729 } 730 731 // Report any devices that had last been added/removed. 732 while (mClosingDevices) { 733 Device* device = mClosingDevices; 734 ALOGV("Reporting device closed: id=%d, name=%s\n", 735 device->id, device->path.string()); 736 mClosingDevices = device->next; 737 event->when = now; 738 event->deviceId = device->id == mBuiltInKeyboardId ? BUILT_IN_KEYBOARD_ID : device->id; 739 event->type = DEVICE_REMOVED; 740 event += 1; 741 delete device; 742 mNeedToSendFinishedDeviceScan = true; 743 if (--capacity == 0) { 744 break; 745 } 746 } 747 748 if (mNeedToScanDevices) { 749 mNeedToScanDevices = false; 750 scanDevicesLocked(); 751 mNeedToSendFinishedDeviceScan = true; 752 } 753 754 while (mOpeningDevices != NULL) { 755 Device* device = mOpeningDevices; 756 ALOGV("Reporting device opened: id=%d, name=%s\n", 757 device->id, device->path.string()); 758 mOpeningDevices = device->next; 759 event->when = now; 760 event->deviceId = device->id == mBuiltInKeyboardId ? 0 : device->id; 761 event->type = DEVICE_ADDED; 762 event += 1; 763 mNeedToSendFinishedDeviceScan = true; 764 if (--capacity == 0) { 765 break; 766 } 767 } 768 769 if (mNeedToSendFinishedDeviceScan) { 770 mNeedToSendFinishedDeviceScan = false; 771 event->when = now; 772 event->type = FINISHED_DEVICE_SCAN; 773 event += 1; 774 if (--capacity == 0) { 775 break; 776 } 777 } 778 779 // Grab the next input event. 780 bool deviceChanged = false; 781 while (mPendingEventIndex < mPendingEventCount) { 782 const struct epoll_event& eventItem = mPendingEventItems[mPendingEventIndex++]; 783 if (eventItem.data.u32 == EPOLL_ID_INOTIFY) { 784 if (eventItem.events & EPOLLIN) { 785 mPendingINotify = true; 786 } else { 787 ALOGW("Received unexpected epoll event 0x%08x for INotify.", eventItem.events); 788 } 789 continue; 790 } 791 792 if (eventItem.data.u32 == EPOLL_ID_WAKE) { 793 if (eventItem.events & EPOLLIN) { 794 ALOGV("awoken after wake()"); 795 awoken = true; 796 char buffer[16]; 797 ssize_t nRead; 798 do { 799 nRead = read(mWakeReadPipeFd, buffer, sizeof(buffer)); 800 } while ((nRead == -1 && errno == EINTR) || nRead == sizeof(buffer)); 801 } else { 802 ALOGW("Received unexpected epoll event 0x%08x for wake read pipe.", 803 eventItem.events); 804 } 805 continue; 806 } 807 808 ssize_t deviceIndex = mDevices.indexOfKey(eventItem.data.u32); 809 if (deviceIndex < 0) { 810 ALOGW("Received unexpected epoll event 0x%08x for unknown device id %d.", 811 eventItem.events, eventItem.data.u32); 812 continue; 813 } 814 815 Device* device = mDevices.valueAt(deviceIndex); 816 if (eventItem.events & EPOLLIN) { 817 int32_t readSize = read(device->fd, readBuffer, 818 sizeof(struct input_event) * capacity); 819 if (readSize == 0 || (readSize < 0 && errno == ENODEV)) { 820 // Device was removed before INotify noticed. 821 ALOGW("could not get event, removed? (fd: %d size: %" PRId32 822 " bufferSize: %zu capacity: %zu errno: %d)\n", 823 device->fd, readSize, bufferSize, capacity, errno); 824 deviceChanged = true; 825 closeDeviceLocked(device); 826 } else if (readSize < 0) { 827 if (errno != EAGAIN && errno != EINTR) { 828 ALOGW("could not get event (errno=%d)", errno); 829 } 830 } else if ((readSize % sizeof(struct input_event)) != 0) { 831 ALOGE("could not get event (wrong size: %d)", readSize); 832 } else { 833 int32_t deviceId = device->id == mBuiltInKeyboardId ? 0 : device->id; 834 835 size_t count = size_t(readSize) / sizeof(struct input_event); 836 for (size_t i = 0; i < count; i++) { 837 struct input_event& iev = readBuffer[i]; 838 ALOGV("%s got: time=%d.%06d, type=%d, code=%d, value=%d", 839 device->path.string(), 840 (int) iev.time.tv_sec, (int) iev.time.tv_usec, 841 iev.type, iev.code, iev.value); 842 843 // Some input devices may have a better concept of the time 844 // when an input event was actually generated than the kernel 845 // which simply timestamps all events on entry to evdev. 846 // This is a custom Android extension of the input protocol 847 // mainly intended for use with uinput based device drivers. 848 if (iev.type == EV_MSC) { 849 if (iev.code == MSC_ANDROID_TIME_SEC) { 850 device->timestampOverrideSec = iev.value; 851 continue; 852 } else if (iev.code == MSC_ANDROID_TIME_USEC) { 853 device->timestampOverrideUsec = iev.value; 854 continue; 855 } 856 } 857 if (device->timestampOverrideSec || device->timestampOverrideUsec) { 858 iev.time.tv_sec = device->timestampOverrideSec; 859 iev.time.tv_usec = device->timestampOverrideUsec; 860 if (iev.type == EV_SYN && iev.code == SYN_REPORT) { 861 device->timestampOverrideSec = 0; 862 device->timestampOverrideUsec = 0; 863 } 864 ALOGV("applied override time %d.%06d", 865 int(iev.time.tv_sec), int(iev.time.tv_usec)); 866 } 867 868 // Use the time specified in the event instead of the current time 869 // so that downstream code can get more accurate estimates of 870 // event dispatch latency from the time the event is enqueued onto 871 // the evdev client buffer. 872 // 873 // The event's timestamp fortuitously uses the same monotonic clock 874 // time base as the rest of Android. The kernel event device driver 875 // (drivers/input/evdev.c) obtains timestamps using ktime_get_ts(). 876 // The systemTime(SYSTEM_TIME_MONOTONIC) function we use everywhere 877 // calls clock_gettime(CLOCK_MONOTONIC) which is implemented as a 878 // system call that also queries ktime_get_ts(). 879 event->when = nsecs_t(iev.time.tv_sec) * 1000000000LL 880 + nsecs_t(iev.time.tv_usec) * 1000LL; 881 ALOGV("event time %" PRId64 ", now %" PRId64, event->when, now); 882 883 // Bug 7291243: Add a guard in case the kernel generates timestamps 884 // that appear to be far into the future because they were generated 885 // using the wrong clock source. 886 // 887 // This can happen because when the input device is initially opened 888 // it has a default clock source of CLOCK_REALTIME. Any input events 889 // enqueued right after the device is opened will have timestamps 890 // generated using CLOCK_REALTIME. We later set the clock source 891 // to CLOCK_MONOTONIC but it is already too late. 892 // 893 // Invalid input event timestamps can result in ANRs, crashes and 894 // and other issues that are hard to track down. We must not let them 895 // propagate through the system. 896 // 897 // Log a warning so that we notice the problem and recover gracefully. 898 if (event->when >= now + 10 * 1000000000LL) { 899 // Double-check. Time may have moved on. 900 nsecs_t time = systemTime(SYSTEM_TIME_MONOTONIC); 901 if (event->when > time) { 902 ALOGW("An input event from %s has a timestamp that appears to " 903 "have been generated using the wrong clock source " 904 "(expected CLOCK_MONOTONIC): " 905 "event time %" PRId64 ", current time %" PRId64 906 ", call time %" PRId64 ". " 907 "Using current time instead.", 908 device->path.string(), event->when, time, now); 909 event->when = time; 910 } else { 911 ALOGV("Event time is ok but failed the fast path and required " 912 "an extra call to systemTime: " 913 "event time %" PRId64 ", current time %" PRId64 914 ", call time %" PRId64 ".", 915 event->when, time, now); 916 } 917 } 918 event->deviceId = deviceId; 919 event->type = iev.type; 920 event->code = iev.code; 921 event->value = iev.value; 922 event += 1; 923 capacity -= 1; 924 } 925 if (capacity == 0) { 926 // The result buffer is full. Reset the pending event index 927 // so we will try to read the device again on the next iteration. 928 mPendingEventIndex -= 1; 929 break; 930 } 931 } 932 } else if (eventItem.events & EPOLLHUP) { 933 ALOGI("Removing device %s due to epoll hang-up event.", 934 device->identifier.name.string()); 935 deviceChanged = true; 936 closeDeviceLocked(device); 937 } else { 938 ALOGW("Received unexpected epoll event 0x%08x for device %s.", 939 eventItem.events, device->identifier.name.string()); 940 } 941 } 942 943 // readNotify() will modify the list of devices so this must be done after 944 // processing all other events to ensure that we read all remaining events 945 // before closing the devices. 946 if (mPendingINotify && mPendingEventIndex >= mPendingEventCount) { 947 mPendingINotify = false; 948 readNotifyLocked(); 949 deviceChanged = true; 950 } 951 952 // Report added or removed devices immediately. 953 if (deviceChanged) { 954 continue; 955 } 956 957 // Return now if we have collected any events or if we were explicitly awoken. 958 if (event != buffer || awoken) { 959 break; 960 } 961 962 // Poll for events. Mind the wake lock dance! 963 // We hold a wake lock at all times except during epoll_wait(). This works due to some 964 // subtle choreography. When a device driver has pending (unread) events, it acquires 965 // a kernel wake lock. However, once the last pending event has been read, the device 966 // driver will release the kernel wake lock. To prevent the system from going to sleep 967 // when this happens, the EventHub holds onto its own user wake lock while the client 968 // is processing events. Thus the system can only sleep if there are no events 969 // pending or currently being processed. 970 // 971 // The timeout is advisory only. If the device is asleep, it will not wake just to 972 // service the timeout. 973 mPendingEventIndex = 0; 974 975 mLock.unlock(); // release lock before poll, must be before release_wake_lock 976 release_wake_lock(WAKE_LOCK_ID); 977 978 int pollResult = epoll_wait(mEpollFd, mPendingEventItems, EPOLL_MAX_EVENTS, timeoutMillis); 979 980 acquire_wake_lock(PARTIAL_WAKE_LOCK, WAKE_LOCK_ID); 981 mLock.lock(); // reacquire lock after poll, must be after acquire_wake_lock 982 983 if (pollResult == 0) { 984 // Timed out. 985 mPendingEventCount = 0; 986 break; 987 } 988 989 if (pollResult < 0) { 990 // An error occurred. 991 mPendingEventCount = 0; 992 993 // Sleep after errors to avoid locking up the system. 994 // Hopefully the error is transient. 995 if (errno != EINTR) { 996 ALOGW("poll failed (errno=%d)\n", errno); 997 usleep(100000); 998 } 999 } else { 1000 // Some events occurred. 1001 mPendingEventCount = size_t(pollResult); 1002 } 1003 } 1004 1005 // All done, return the number of events we read. 1006 return event - buffer; 1007} 1008 1009void EventHub::wake() { 1010 ALOGV("wake() called"); 1011 1012 ssize_t nWrite; 1013 do { 1014 nWrite = write(mWakeWritePipeFd, "W", 1); 1015 } while (nWrite == -1 && errno == EINTR); 1016 1017 if (nWrite != 1 && errno != EAGAIN) { 1018 ALOGW("Could not write wake signal, errno=%d", errno); 1019 } 1020} 1021 1022void EventHub::scanDevicesLocked() { 1023 status_t res = scanDirLocked(DEVICE_PATH); 1024 if(res < 0) { 1025 ALOGE("scan dir failed for %s\n", DEVICE_PATH); 1026 } 1027 if (mDevices.indexOfKey(VIRTUAL_KEYBOARD_ID) < 0) { 1028 createVirtualKeyboardLocked(); 1029 } 1030} 1031 1032// ---------------------------------------------------------------------------- 1033 1034static bool containsNonZeroByte(const uint8_t* array, uint32_t startIndex, uint32_t endIndex) { 1035 const uint8_t* end = array + endIndex; 1036 array += startIndex; 1037 while (array != end) { 1038 if (*(array++) != 0) { 1039 return true; 1040 } 1041 } 1042 return false; 1043} 1044 1045static const int32_t GAMEPAD_KEYCODES[] = { 1046 AKEYCODE_BUTTON_A, AKEYCODE_BUTTON_B, AKEYCODE_BUTTON_C, 1047 AKEYCODE_BUTTON_X, AKEYCODE_BUTTON_Y, AKEYCODE_BUTTON_Z, 1048 AKEYCODE_BUTTON_L1, AKEYCODE_BUTTON_R1, 1049 AKEYCODE_BUTTON_L2, AKEYCODE_BUTTON_R2, 1050 AKEYCODE_BUTTON_THUMBL, AKEYCODE_BUTTON_THUMBR, 1051 AKEYCODE_BUTTON_START, AKEYCODE_BUTTON_SELECT, AKEYCODE_BUTTON_MODE, 1052}; 1053 1054status_t EventHub::openDeviceLocked(const char *devicePath) { 1055 char buffer[80]; 1056 1057 ALOGV("Opening device: %s", devicePath); 1058 1059 int fd = open(devicePath, O_RDWR | O_CLOEXEC); 1060 if(fd < 0) { 1061 ALOGE("could not open %s, %s\n", devicePath, strerror(errno)); 1062 return -1; 1063 } 1064 1065 InputDeviceIdentifier identifier; 1066 1067 // Get device name. 1068 if(ioctl(fd, EVIOCGNAME(sizeof(buffer) - 1), &buffer) < 1) { 1069 //fprintf(stderr, "could not get device name for %s, %s\n", devicePath, strerror(errno)); 1070 } else { 1071 buffer[sizeof(buffer) - 1] = '\0'; 1072 identifier.name.setTo(buffer); 1073 } 1074 1075 // Check to see if the device is on our excluded list 1076 for (size_t i = 0; i < mExcludedDevices.size(); i++) { 1077 const String8& item = mExcludedDevices.itemAt(i); 1078 if (identifier.name == item) { 1079 ALOGI("ignoring event id %s driver %s\n", devicePath, item.string()); 1080 close(fd); 1081 return -1; 1082 } 1083 } 1084 1085 // Get device driver version. 1086 int driverVersion; 1087 if(ioctl(fd, EVIOCGVERSION, &driverVersion)) { 1088 ALOGE("could not get driver version for %s, %s\n", devicePath, strerror(errno)); 1089 close(fd); 1090 return -1; 1091 } 1092 1093 // Get device identifier. 1094 struct input_id inputId; 1095 if(ioctl(fd, EVIOCGID, &inputId)) { 1096 ALOGE("could not get device input id for %s, %s\n", devicePath, strerror(errno)); 1097 close(fd); 1098 return -1; 1099 } 1100 identifier.bus = inputId.bustype; 1101 identifier.product = inputId.product; 1102 identifier.vendor = inputId.vendor; 1103 identifier.version = inputId.version; 1104 1105 // Get device physical location. 1106 if(ioctl(fd, EVIOCGPHYS(sizeof(buffer) - 1), &buffer) < 1) { 1107 //fprintf(stderr, "could not get location for %s, %s\n", devicePath, strerror(errno)); 1108 } else { 1109 buffer[sizeof(buffer) - 1] = '\0'; 1110 identifier.location.setTo(buffer); 1111 } 1112 1113 // Get device unique id. 1114 if(ioctl(fd, EVIOCGUNIQ(sizeof(buffer) - 1), &buffer) < 1) { 1115 //fprintf(stderr, "could not get idstring for %s, %s\n", devicePath, strerror(errno)); 1116 } else { 1117 buffer[sizeof(buffer) - 1] = '\0'; 1118 identifier.uniqueId.setTo(buffer); 1119 } 1120 1121 // Fill in the descriptor. 1122 assignDescriptorLocked(identifier); 1123 1124 // Make file descriptor non-blocking for use with poll(). 1125 if (fcntl(fd, F_SETFL, O_NONBLOCK)) { 1126 ALOGE("Error %d making device file descriptor non-blocking.", errno); 1127 close(fd); 1128 return -1; 1129 } 1130 1131 // Allocate device. (The device object takes ownership of the fd at this point.) 1132 int32_t deviceId = mNextDeviceId++; 1133 Device* device = new Device(fd, deviceId, String8(devicePath), identifier); 1134 1135 ALOGV("add device %d: %s\n", deviceId, devicePath); 1136 ALOGV(" bus: %04x\n" 1137 " vendor %04x\n" 1138 " product %04x\n" 1139 " version %04x\n", 1140 identifier.bus, identifier.vendor, identifier.product, identifier.version); 1141 ALOGV(" name: \"%s\"\n", identifier.name.string()); 1142 ALOGV(" location: \"%s\"\n", identifier.location.string()); 1143 ALOGV(" unique id: \"%s\"\n", identifier.uniqueId.string()); 1144 ALOGV(" descriptor: \"%s\"\n", identifier.descriptor.string()); 1145 ALOGV(" driver: v%d.%d.%d\n", 1146 driverVersion >> 16, (driverVersion >> 8) & 0xff, driverVersion & 0xff); 1147 1148 // Load the configuration file for the device. 1149 loadConfigurationLocked(device); 1150 1151 // Figure out the kinds of events the device reports. 1152 ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(device->keyBitmask)), device->keyBitmask); 1153 ioctl(fd, EVIOCGBIT(EV_ABS, sizeof(device->absBitmask)), device->absBitmask); 1154 ioctl(fd, EVIOCGBIT(EV_REL, sizeof(device->relBitmask)), device->relBitmask); 1155 ioctl(fd, EVIOCGBIT(EV_SW, sizeof(device->swBitmask)), device->swBitmask); 1156 ioctl(fd, EVIOCGBIT(EV_LED, sizeof(device->ledBitmask)), device->ledBitmask); 1157 ioctl(fd, EVIOCGBIT(EV_FF, sizeof(device->ffBitmask)), device->ffBitmask); 1158 ioctl(fd, EVIOCGPROP(sizeof(device->propBitmask)), device->propBitmask); 1159 1160 // See if this is a keyboard. Ignore everything in the button range except for 1161 // joystick and gamepad buttons which are handled like keyboards for the most part. 1162 bool haveKeyboardKeys = containsNonZeroByte(device->keyBitmask, 0, sizeof_bit_array(BTN_MISC)) 1163 || containsNonZeroByte(device->keyBitmask, sizeof_bit_array(KEY_OK), 1164 sizeof_bit_array(KEY_MAX + 1)); 1165 bool haveGamepadButtons = containsNonZeroByte(device->keyBitmask, sizeof_bit_array(BTN_MISC), 1166 sizeof_bit_array(BTN_MOUSE)) 1167 || containsNonZeroByte(device->keyBitmask, sizeof_bit_array(BTN_JOYSTICK), 1168 sizeof_bit_array(BTN_DIGI)); 1169 if (haveKeyboardKeys || haveGamepadButtons) { 1170 device->classes |= INPUT_DEVICE_CLASS_KEYBOARD; 1171 } 1172 1173 // See if this is a cursor device such as a trackball or mouse. 1174 if (test_bit(BTN_MOUSE, device->keyBitmask) 1175 && test_bit(REL_X, device->relBitmask) 1176 && test_bit(REL_Y, device->relBitmask)) { 1177 device->classes |= INPUT_DEVICE_CLASS_CURSOR; 1178 } 1179 1180 // See if this is a rotary encoder type device. 1181 String8 deviceType = String8(); 1182 if (device->configuration && 1183 device->configuration->tryGetProperty(String8("device.type"), deviceType)) { 1184 if (!deviceType.compare(String8("rotaryEncoder"))) { 1185 device->classes |= INPUT_DEVICE_CLASS_ROTARY_ENCODER; 1186 } 1187 } 1188 1189 // See if this is a touch pad. 1190 // Is this a new modern multi-touch driver? 1191 if (test_bit(ABS_MT_POSITION_X, device->absBitmask) 1192 && test_bit(ABS_MT_POSITION_Y, device->absBitmask)) { 1193 // Some joysticks such as the PS3 controller report axes that conflict 1194 // with the ABS_MT range. Try to confirm that the device really is 1195 // a touch screen. 1196 if (test_bit(BTN_TOUCH, device->keyBitmask) || !haveGamepadButtons) { 1197 device->classes |= INPUT_DEVICE_CLASS_TOUCH | INPUT_DEVICE_CLASS_TOUCH_MT; 1198 } 1199 // Is this an old style single-touch driver? 1200 } else if (test_bit(BTN_TOUCH, device->keyBitmask) 1201 && test_bit(ABS_X, device->absBitmask) 1202 && test_bit(ABS_Y, device->absBitmask)) { 1203 device->classes |= INPUT_DEVICE_CLASS_TOUCH; 1204 // Is this a BT stylus? 1205 } else if ((test_bit(ABS_PRESSURE, device->absBitmask) || 1206 test_bit(BTN_TOUCH, device->keyBitmask)) 1207 && !test_bit(ABS_X, device->absBitmask) 1208 && !test_bit(ABS_Y, device->absBitmask)) { 1209 device->classes |= INPUT_DEVICE_CLASS_EXTERNAL_STYLUS; 1210 // Keyboard will try to claim some of the buttons but we really want to reserve those so we 1211 // can fuse it with the touch screen data, so just take them back. Note this means an 1212 // external stylus cannot also be a keyboard device. 1213 device->classes &= ~INPUT_DEVICE_CLASS_KEYBOARD; 1214 } 1215 1216 // See if this device is a joystick. 1217 // Assumes that joysticks always have gamepad buttons in order to distinguish them 1218 // from other devices such as accelerometers that also have absolute axes. 1219 if (haveGamepadButtons) { 1220 uint32_t assumedClasses = device->classes | INPUT_DEVICE_CLASS_JOYSTICK; 1221 for (int i = 0; i <= ABS_MAX; i++) { 1222 if (test_bit(i, device->absBitmask) 1223 && (getAbsAxisUsage(i, assumedClasses) & INPUT_DEVICE_CLASS_JOYSTICK)) { 1224 device->classes = assumedClasses; 1225 break; 1226 } 1227 } 1228 } 1229 1230 // Check whether this device has switches. 1231 for (int i = 0; i <= SW_MAX; i++) { 1232 if (test_bit(i, device->swBitmask)) { 1233 device->classes |= INPUT_DEVICE_CLASS_SWITCH; 1234 break; 1235 } 1236 } 1237 1238 // Check whether this device supports the vibrator. 1239 if (test_bit(FF_RUMBLE, device->ffBitmask)) { 1240 device->classes |= INPUT_DEVICE_CLASS_VIBRATOR; 1241 } 1242 1243 // Configure virtual keys. 1244 if ((device->classes & INPUT_DEVICE_CLASS_TOUCH)) { 1245 // Load the virtual keys for the touch screen, if any. 1246 // We do this now so that we can make sure to load the keymap if necessary. 1247 status_t status = loadVirtualKeyMapLocked(device); 1248 if (!status) { 1249 device->classes |= INPUT_DEVICE_CLASS_KEYBOARD; 1250 } 1251 } 1252 1253 // Load the key map. 1254 // We need to do this for joysticks too because the key layout may specify axes. 1255 status_t keyMapStatus = NAME_NOT_FOUND; 1256 if (device->classes & (INPUT_DEVICE_CLASS_KEYBOARD | INPUT_DEVICE_CLASS_JOYSTICK)) { 1257 // Load the keymap for the device. 1258 keyMapStatus = loadKeyMapLocked(device); 1259 } 1260 1261 // Configure the keyboard, gamepad or virtual keyboard. 1262 if (device->classes & INPUT_DEVICE_CLASS_KEYBOARD) { 1263 // Register the keyboard as a built-in keyboard if it is eligible. 1264 if (!keyMapStatus 1265 && mBuiltInKeyboardId == NO_BUILT_IN_KEYBOARD 1266 && isEligibleBuiltInKeyboard(device->identifier, 1267 device->configuration, &device->keyMap)) { 1268 mBuiltInKeyboardId = device->id; 1269 } 1270 1271 // 'Q' key support = cheap test of whether this is an alpha-capable kbd 1272 if (hasKeycodeLocked(device, AKEYCODE_Q)) { 1273 device->classes |= INPUT_DEVICE_CLASS_ALPHAKEY; 1274 } 1275 1276 // See if this device has a DPAD. 1277 if (hasKeycodeLocked(device, AKEYCODE_DPAD_UP) && 1278 hasKeycodeLocked(device, AKEYCODE_DPAD_DOWN) && 1279 hasKeycodeLocked(device, AKEYCODE_DPAD_LEFT) && 1280 hasKeycodeLocked(device, AKEYCODE_DPAD_RIGHT) && 1281 hasKeycodeLocked(device, AKEYCODE_DPAD_CENTER)) { 1282 device->classes |= INPUT_DEVICE_CLASS_DPAD; 1283 } 1284 1285 // See if this device has a gamepad. 1286 for (size_t i = 0; i < sizeof(GAMEPAD_KEYCODES)/sizeof(GAMEPAD_KEYCODES[0]); i++) { 1287 if (hasKeycodeLocked(device, GAMEPAD_KEYCODES[i])) { 1288 device->classes |= INPUT_DEVICE_CLASS_GAMEPAD; 1289 break; 1290 } 1291 } 1292 1293 // Disable kernel key repeat since we handle it ourselves 1294 unsigned int repeatRate[] = {0,0}; 1295 if (ioctl(fd, EVIOCSREP, repeatRate)) { 1296 ALOGW("Unable to disable kernel key repeat for %s: %s", devicePath, strerror(errno)); 1297 } 1298 } 1299 1300 // If the device isn't recognized as something we handle, don't monitor it. 1301 if (device->classes == 0) { 1302 ALOGV("Dropping device: id=%d, path='%s', name='%s'", 1303 deviceId, devicePath, device->identifier.name.string()); 1304 delete device; 1305 return -1; 1306 } 1307 1308 // Determine whether the device has a mic. 1309 if (deviceHasMicLocked(device)) { 1310 device->classes |= INPUT_DEVICE_CLASS_MIC; 1311 } 1312 1313 // Determine whether the device is external or internal. 1314 if (isExternalDeviceLocked(device)) { 1315 device->classes |= INPUT_DEVICE_CLASS_EXTERNAL; 1316 } 1317 1318 if (device->classes & (INPUT_DEVICE_CLASS_JOYSTICK | INPUT_DEVICE_CLASS_DPAD) 1319 && device->classes & INPUT_DEVICE_CLASS_GAMEPAD) { 1320 device->controllerNumber = getNextControllerNumberLocked(device); 1321 setLedForController(device); 1322 } 1323 1324 // Register with epoll. 1325 struct epoll_event eventItem; 1326 memset(&eventItem, 0, sizeof(eventItem)); 1327 eventItem.events = EPOLLIN; 1328 if (mUsingEpollWakeup) { 1329 eventItem.events |= EPOLLWAKEUP; 1330 } 1331 eventItem.data.u32 = deviceId; 1332 if (epoll_ctl(mEpollFd, EPOLL_CTL_ADD, fd, &eventItem)) { 1333 ALOGE("Could not add device fd to epoll instance. errno=%d", errno); 1334 delete device; 1335 return -1; 1336 } 1337 1338 String8 wakeMechanism("EPOLLWAKEUP"); 1339 if (!mUsingEpollWakeup) { 1340#ifndef EVIOCSSUSPENDBLOCK 1341 // uapi headers don't include EVIOCSSUSPENDBLOCK, and future kernels 1342 // will use an epoll flag instead, so as long as we want to support 1343 // this feature, we need to be prepared to define the ioctl ourselves. 1344#define EVIOCSSUSPENDBLOCK _IOW('E', 0x91, int) 1345#endif 1346 if (ioctl(fd, EVIOCSSUSPENDBLOCK, 1)) { 1347 wakeMechanism = "<none>"; 1348 } else { 1349 wakeMechanism = "EVIOCSSUSPENDBLOCK"; 1350 } 1351 } 1352 1353 // Tell the kernel that we want to use the monotonic clock for reporting timestamps 1354 // associated with input events. This is important because the input system 1355 // uses the timestamps extensively and assumes they were recorded using the monotonic 1356 // clock. 1357 // 1358 // In older kernel, before Linux 3.4, there was no way to tell the kernel which 1359 // clock to use to input event timestamps. The standard kernel behavior was to 1360 // record a real time timestamp, which isn't what we want. Android kernels therefore 1361 // contained a patch to the evdev_event() function in drivers/input/evdev.c to 1362 // replace the call to do_gettimeofday() with ktime_get_ts() to cause the monotonic 1363 // clock to be used instead of the real time clock. 1364 // 1365 // As of Linux 3.4, there is a new EVIOCSCLOCKID ioctl to set the desired clock. 1366 // Therefore, we no longer require the Android-specific kernel patch described above 1367 // as long as we make sure to set select the monotonic clock. We do that here. 1368 int clockId = CLOCK_MONOTONIC; 1369 bool usingClockIoctl = !ioctl(fd, EVIOCSCLOCKID, &clockId); 1370 1371 ALOGI("New device: id=%d, fd=%d, path='%s', name='%s', classes=0x%x, " 1372 "configuration='%s', keyLayout='%s', keyCharacterMap='%s', builtinKeyboard=%s, " 1373 "wakeMechanism=%s, usingClockIoctl=%s", 1374 deviceId, fd, devicePath, device->identifier.name.string(), 1375 device->classes, 1376 device->configurationFile.string(), 1377 device->keyMap.keyLayoutFile.string(), 1378 device->keyMap.keyCharacterMapFile.string(), 1379 toString(mBuiltInKeyboardId == deviceId), 1380 wakeMechanism.string(), toString(usingClockIoctl)); 1381 1382 addDeviceLocked(device); 1383 return 0; 1384} 1385 1386void EventHub::createVirtualKeyboardLocked() { 1387 InputDeviceIdentifier identifier; 1388 identifier.name = "Virtual"; 1389 identifier.uniqueId = "<virtual>"; 1390 assignDescriptorLocked(identifier); 1391 1392 Device* device = new Device(-1, VIRTUAL_KEYBOARD_ID, String8("<virtual>"), identifier); 1393 device->classes = INPUT_DEVICE_CLASS_KEYBOARD 1394 | INPUT_DEVICE_CLASS_ALPHAKEY 1395 | INPUT_DEVICE_CLASS_DPAD 1396 | INPUT_DEVICE_CLASS_VIRTUAL; 1397 loadKeyMapLocked(device); 1398 addDeviceLocked(device); 1399} 1400 1401void EventHub::addDeviceLocked(Device* device) { 1402 mDevices.add(device->id, device); 1403 device->next = mOpeningDevices; 1404 mOpeningDevices = device; 1405} 1406 1407void EventHub::loadConfigurationLocked(Device* device) { 1408 device->configurationFile = getInputDeviceConfigurationFilePathByDeviceIdentifier( 1409 device->identifier, INPUT_DEVICE_CONFIGURATION_FILE_TYPE_CONFIGURATION); 1410 if (device->configurationFile.isEmpty()) { 1411 ALOGD("No input device configuration file found for device '%s'.", 1412 device->identifier.name.string()); 1413 } else { 1414 status_t status = PropertyMap::load(device->configurationFile, 1415 &device->configuration); 1416 if (status) { 1417 ALOGE("Error loading input device configuration file for device '%s'. " 1418 "Using default configuration.", 1419 device->identifier.name.string()); 1420 } 1421 } 1422} 1423 1424status_t EventHub::loadVirtualKeyMapLocked(Device* device) { 1425 // The virtual key map is supplied by the kernel as a system board property file. 1426 String8 path; 1427 path.append("/sys/board_properties/virtualkeys."); 1428 path.append(device->identifier.name); 1429 if (access(path.string(), R_OK)) { 1430 return NAME_NOT_FOUND; 1431 } 1432 return VirtualKeyMap::load(path, &device->virtualKeyMap); 1433} 1434 1435status_t EventHub::loadKeyMapLocked(Device* device) { 1436 return device->keyMap.load(device->identifier, device->configuration); 1437} 1438 1439bool EventHub::isExternalDeviceLocked(Device* device) { 1440 if (device->configuration) { 1441 bool value; 1442 if (device->configuration->tryGetProperty(String8("device.internal"), value)) { 1443 return !value; 1444 } 1445 } 1446 return device->identifier.bus == BUS_USB || device->identifier.bus == BUS_BLUETOOTH; 1447} 1448 1449bool EventHub::deviceHasMicLocked(Device* device) { 1450 if (device->configuration) { 1451 bool value; 1452 if (device->configuration->tryGetProperty(String8("audio.mic"), value)) { 1453 return value; 1454 } 1455 } 1456 return false; 1457} 1458 1459int32_t EventHub::getNextControllerNumberLocked(Device* device) { 1460 if (mControllerNumbers.isFull()) { 1461 ALOGI("Maximum number of controllers reached, assigning controller number 0 to device %s", 1462 device->identifier.name.string()); 1463 return 0; 1464 } 1465 // Since the controller number 0 is reserved for non-controllers, translate all numbers up by 1466 // one 1467 return static_cast<int32_t>(mControllerNumbers.markFirstUnmarkedBit() + 1); 1468} 1469 1470void EventHub::releaseControllerNumberLocked(Device* device) { 1471 int32_t num = device->controllerNumber; 1472 device->controllerNumber= 0; 1473 if (num == 0) { 1474 return; 1475 } 1476 mControllerNumbers.clearBit(static_cast<uint32_t>(num - 1)); 1477} 1478 1479void EventHub::setLedForController(Device* device) { 1480 for (int i = 0; i < MAX_CONTROLLER_LEDS; i++) { 1481 setLedStateLocked(device, ALED_CONTROLLER_1 + i, device->controllerNumber == i + 1); 1482 } 1483} 1484 1485bool EventHub::hasKeycodeLocked(Device* device, int keycode) const { 1486 if (!device->keyMap.haveKeyLayout()) { 1487 return false; 1488 } 1489 1490 Vector<int32_t> scanCodes; 1491 device->keyMap.keyLayoutMap->findScanCodesForKey(keycode, &scanCodes); 1492 const size_t N = scanCodes.size(); 1493 for (size_t i=0; i<N && i<=KEY_MAX; i++) { 1494 int32_t sc = scanCodes.itemAt(i); 1495 if (sc >= 0 && sc <= KEY_MAX && test_bit(sc, device->keyBitmask)) { 1496 return true; 1497 } 1498 } 1499 1500 return false; 1501} 1502 1503status_t EventHub::mapLed(Device* device, int32_t led, int32_t* outScanCode) const { 1504 if (!device->keyMap.haveKeyLayout()) { 1505 return NAME_NOT_FOUND; 1506 } 1507 1508 int32_t scanCode; 1509 if(device->keyMap.keyLayoutMap->findScanCodeForLed(led, &scanCode) != NAME_NOT_FOUND) { 1510 if(scanCode >= 0 && scanCode <= LED_MAX && test_bit(scanCode, device->ledBitmask)) { 1511 *outScanCode = scanCode; 1512 return NO_ERROR; 1513 } 1514 } 1515 return NAME_NOT_FOUND; 1516} 1517 1518status_t EventHub::closeDeviceByPathLocked(const char *devicePath) { 1519 Device* device = getDeviceByPathLocked(devicePath); 1520 if (device) { 1521 closeDeviceLocked(device); 1522 return 0; 1523 } 1524 ALOGV("Remove device: %s not found, device may already have been removed.", devicePath); 1525 return -1; 1526} 1527 1528void EventHub::closeAllDevicesLocked() { 1529 while (mDevices.size() > 0) { 1530 closeDeviceLocked(mDevices.valueAt(mDevices.size() - 1)); 1531 } 1532} 1533 1534void EventHub::closeDeviceLocked(Device* device) { 1535 ALOGI("Removed device: path=%s name=%s id=%d fd=%d classes=0x%x\n", 1536 device->path.string(), device->identifier.name.string(), device->id, 1537 device->fd, device->classes); 1538 1539 if (device->id == mBuiltInKeyboardId) { 1540 ALOGW("built-in keyboard device %s (id=%d) is closing! the apps will not like this", 1541 device->path.string(), mBuiltInKeyboardId); 1542 mBuiltInKeyboardId = NO_BUILT_IN_KEYBOARD; 1543 } 1544 1545 if (!device->isVirtual()) { 1546 if (epoll_ctl(mEpollFd, EPOLL_CTL_DEL, device->fd, NULL)) { 1547 ALOGW("Could not remove device fd from epoll instance. errno=%d", errno); 1548 } 1549 } 1550 1551 releaseControllerNumberLocked(device); 1552 1553 mDevices.removeItem(device->id); 1554 device->close(); 1555 1556 // Unlink for opening devices list if it is present. 1557 Device* pred = NULL; 1558 bool found = false; 1559 for (Device* entry = mOpeningDevices; entry != NULL; ) { 1560 if (entry == device) { 1561 found = true; 1562 break; 1563 } 1564 pred = entry; 1565 entry = entry->next; 1566 } 1567 if (found) { 1568 // Unlink the device from the opening devices list then delete it. 1569 // We don't need to tell the client that the device was closed because 1570 // it does not even know it was opened in the first place. 1571 ALOGI("Device %s was immediately closed after opening.", device->path.string()); 1572 if (pred) { 1573 pred->next = device->next; 1574 } else { 1575 mOpeningDevices = device->next; 1576 } 1577 delete device; 1578 } else { 1579 // Link into closing devices list. 1580 // The device will be deleted later after we have informed the client. 1581 device->next = mClosingDevices; 1582 mClosingDevices = device; 1583 } 1584} 1585 1586status_t EventHub::readNotifyLocked() { 1587 int res; 1588 char devname[PATH_MAX]; 1589 char *filename; 1590 char event_buf[512]; 1591 int event_size; 1592 int event_pos = 0; 1593 struct inotify_event *event; 1594 1595 ALOGV("EventHub::readNotify nfd: %d\n", mINotifyFd); 1596 res = read(mINotifyFd, event_buf, sizeof(event_buf)); 1597 if(res < (int)sizeof(*event)) { 1598 if(errno == EINTR) 1599 return 0; 1600 ALOGW("could not get event, %s\n", strerror(errno)); 1601 return -1; 1602 } 1603 //printf("got %d bytes of event information\n", res); 1604 1605 strcpy(devname, DEVICE_PATH); 1606 filename = devname + strlen(devname); 1607 *filename++ = '/'; 1608 1609 while(res >= (int)sizeof(*event)) { 1610 event = (struct inotify_event *)(event_buf + event_pos); 1611 //printf("%d: %08x \"%s\"\n", event->wd, event->mask, event->len ? event->name : ""); 1612 if(event->len) { 1613 strcpy(filename, event->name); 1614 if(event->mask & IN_CREATE) { 1615 openDeviceLocked(devname); 1616 } else { 1617 ALOGI("Removing device '%s' due to inotify event\n", devname); 1618 closeDeviceByPathLocked(devname); 1619 } 1620 } 1621 event_size = sizeof(*event) + event->len; 1622 res -= event_size; 1623 event_pos += event_size; 1624 } 1625 return 0; 1626} 1627 1628status_t EventHub::scanDirLocked(const char *dirname) 1629{ 1630 char devname[PATH_MAX]; 1631 char *filename; 1632 DIR *dir; 1633 struct dirent *de; 1634 dir = opendir(dirname); 1635 if(dir == NULL) 1636 return -1; 1637 strcpy(devname, dirname); 1638 filename = devname + strlen(devname); 1639 *filename++ = '/'; 1640 while((de = readdir(dir))) { 1641 if(de->d_name[0] == '.' && 1642 (de->d_name[1] == '\0' || 1643 (de->d_name[1] == '.' && de->d_name[2] == '\0'))) 1644 continue; 1645 strcpy(filename, de->d_name); 1646 openDeviceLocked(devname); 1647 } 1648 closedir(dir); 1649 return 0; 1650} 1651 1652void EventHub::requestReopenDevices() { 1653 ALOGV("requestReopenDevices() called"); 1654 1655 AutoMutex _l(mLock); 1656 mNeedToReopenDevices = true; 1657} 1658 1659void EventHub::dump(String8& dump) { 1660 dump.append("Event Hub State:\n"); 1661 1662 { // acquire lock 1663 AutoMutex _l(mLock); 1664 1665 dump.appendFormat(INDENT "BuiltInKeyboardId: %d\n", mBuiltInKeyboardId); 1666 1667 dump.append(INDENT "Devices:\n"); 1668 1669 for (size_t i = 0; i < mDevices.size(); i++) { 1670 const Device* device = mDevices.valueAt(i); 1671 if (mBuiltInKeyboardId == device->id) { 1672 dump.appendFormat(INDENT2 "%d: %s (aka device 0 - built-in keyboard)\n", 1673 device->id, device->identifier.name.string()); 1674 } else { 1675 dump.appendFormat(INDENT2 "%d: %s\n", device->id, 1676 device->identifier.name.string()); 1677 } 1678 dump.appendFormat(INDENT3 "Classes: 0x%08x\n", device->classes); 1679 dump.appendFormat(INDENT3 "Path: %s\n", device->path.string()); 1680 dump.appendFormat(INDENT3 "Descriptor: %s\n", device->identifier.descriptor.string()); 1681 dump.appendFormat(INDENT3 "Location: %s\n", device->identifier.location.string()); 1682 dump.appendFormat(INDENT3 "ControllerNumber: %d\n", device->controllerNumber); 1683 dump.appendFormat(INDENT3 "UniqueId: %s\n", device->identifier.uniqueId.string()); 1684 dump.appendFormat(INDENT3 "Identifier: bus=0x%04x, vendor=0x%04x, " 1685 "product=0x%04x, version=0x%04x\n", 1686 device->identifier.bus, device->identifier.vendor, 1687 device->identifier.product, device->identifier.version); 1688 dump.appendFormat(INDENT3 "KeyLayoutFile: %s\n", 1689 device->keyMap.keyLayoutFile.string()); 1690 dump.appendFormat(INDENT3 "KeyCharacterMapFile: %s\n", 1691 device->keyMap.keyCharacterMapFile.string()); 1692 dump.appendFormat(INDENT3 "ConfigurationFile: %s\n", 1693 device->configurationFile.string()); 1694 dump.appendFormat(INDENT3 "HaveKeyboardLayoutOverlay: %s\n", 1695 toString(device->overlayKeyMap != NULL)); 1696 } 1697 } // release lock 1698} 1699 1700void EventHub::monitor() { 1701 // Acquire and release the lock to ensure that the event hub has not deadlocked. 1702 mLock.lock(); 1703 mLock.unlock(); 1704} 1705 1706 1707}; // namespace android 1708