EventHub.cpp revision 68d6075b4ad2205c10064c78cde552e3210cca91
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// 18// Handle events, like key input and vsync. 19// 20// The goal is to provide an optimized solution for Linux, not an 21// implementation that works well across all platforms. We expect 22// events to arrive on file descriptors, so that we can use a select() 23// select() call to sleep. 24// 25// We can't select() on anything but network sockets in Windows, so we 26// provide an alternative implementation of waitEvent for that platform. 27// 28#define LOG_TAG "EventHub" 29 30//#define LOG_NDEBUG 0 31 32#include "EventHub.h" 33 34#include <hardware_legacy/power.h> 35 36#include <cutils/properties.h> 37#include <utils/Log.h> 38#include <utils/Timers.h> 39#include <utils/threads.h> 40#include <utils/Errors.h> 41 42#include <stdlib.h> 43#include <stdio.h> 44#include <unistd.h> 45#include <fcntl.h> 46#include <memory.h> 47#include <errno.h> 48#include <assert.h> 49 50#include <ui/KeyLayoutMap.h> 51#include <ui/KeyCharacterMap.h> 52#include <ui/VirtualKeyMap.h> 53 54#include <string.h> 55#include <stdint.h> 56#include <dirent.h> 57#ifdef HAVE_INOTIFY 58# include <sys/inotify.h> 59#endif 60#ifdef HAVE_ANDROID_OS 61# include <sys/limits.h> /* not part of Linux */ 62#endif 63#include <sys/poll.h> 64#include <sys/ioctl.h> 65 66/* this macro is used to tell if "bit" is set in "array" 67 * it selects a byte from the array, and does a boolean AND 68 * operation with a byte that only has the relevant bit set. 69 * eg. to check for the 12th bit, we do (array[1] & 1<<4) 70 */ 71#define test_bit(bit, array) (array[bit/8] & (1<<(bit%8))) 72 73/* this macro computes the number of bytes needed to represent a bit array of the specified size */ 74#define sizeof_bit_array(bits) ((bits + 7) / 8) 75 76// Fd at index 0 is always reserved for inotify 77#define FIRST_ACTUAL_DEVICE_INDEX 1 78 79#define INDENT " " 80#define INDENT2 " " 81#define INDENT3 " " 82 83namespace android { 84 85static const char *WAKE_LOCK_ID = "KeyEvents"; 86static const char *DEVICE_PATH = "/dev/input"; 87 88/* return the larger integer */ 89static inline int max(int v1, int v2) 90{ 91 return (v1 > v2) ? v1 : v2; 92} 93 94static inline const char* toString(bool value) { 95 return value ? "true" : "false"; 96} 97 98// --- EventHub::Device --- 99 100EventHub::Device::Device(int fd, int32_t id, const String8& path, 101 const InputDeviceIdentifier& identifier) : 102 next(NULL), 103 fd(fd), id(id), path(path), identifier(identifier), 104 classes(0), keyBitmask(NULL), relBitmask(NULL), 105 configuration(NULL), virtualKeyMap(NULL) { 106} 107 108EventHub::Device::~Device() { 109 close(); 110 delete[] keyBitmask; 111 delete[] relBitmask; 112 delete configuration; 113 delete virtualKeyMap; 114} 115 116void EventHub::Device::close() { 117 if (fd >= 0) { 118 ::close(fd); 119 fd = -1; 120 } 121} 122 123 124// --- EventHub --- 125 126EventHub::EventHub(void) : 127 mError(NO_INIT), mBuiltInKeyboardId(-1), mNextDeviceId(1), 128 mOpeningDevices(0), mClosingDevices(0), 129 mOpened(false), mNeedToSendFinishedDeviceScan(false), 130 mInputBufferIndex(0), mInputBufferCount(0), mInputFdIndex(0) { 131 acquire_wake_lock(PARTIAL_WAKE_LOCK, WAKE_LOCK_ID); 132 memset(mSwitches, 0, sizeof(mSwitches)); 133} 134 135EventHub::~EventHub(void) { 136 release_wake_lock(WAKE_LOCK_ID); 137 // we should free stuff here... 138} 139 140status_t EventHub::errorCheck() const { 141 return mError; 142} 143 144String8 EventHub::getDeviceName(int32_t deviceId) const { 145 AutoMutex _l(mLock); 146 Device* device = getDeviceLocked(deviceId); 147 if (device == NULL) return String8(); 148 return device->identifier.name; 149} 150 151uint32_t EventHub::getDeviceClasses(int32_t deviceId) const { 152 AutoMutex _l(mLock); 153 Device* device = getDeviceLocked(deviceId); 154 if (device == NULL) return 0; 155 return device->classes; 156} 157 158void EventHub::getConfiguration(int32_t deviceId, PropertyMap* outConfiguration) const { 159 AutoMutex _l(mLock); 160 Device* device = getDeviceLocked(deviceId); 161 if (device && device->configuration) { 162 *outConfiguration = *device->configuration; 163 } else { 164 outConfiguration->clear(); 165 } 166} 167 168status_t EventHub::getAbsoluteAxisInfo(int32_t deviceId, int axis, 169 RawAbsoluteAxisInfo* outAxisInfo) const { 170 outAxisInfo->clear(); 171 172 AutoMutex _l(mLock); 173 Device* device = getDeviceLocked(deviceId); 174 if (device == NULL) return -1; 175 176 struct input_absinfo info; 177 178 if(ioctl(device->fd, EVIOCGABS(axis), &info)) { 179 LOGW("Error reading absolute controller %d for device %s fd %d\n", 180 axis, device->identifier.name.string(), device->fd); 181 return -errno; 182 } 183 184 if (info.minimum != info.maximum) { 185 outAxisInfo->valid = true; 186 outAxisInfo->minValue = info.minimum; 187 outAxisInfo->maxValue = info.maximum; 188 outAxisInfo->flat = info.flat; 189 outAxisInfo->fuzz = info.fuzz; 190 } 191 return OK; 192} 193 194bool EventHub::hasRelativeAxis(int32_t deviceId, int axis) const { 195 if (axis >= 0 && axis <= REL_MAX) { 196 AutoMutex _l(mLock); 197 198 Device* device = getDeviceLocked(deviceId); 199 if (device && device->relBitmask) { 200 return test_bit(axis, device->relBitmask); 201 } 202 } 203 return false; 204} 205 206int32_t EventHub::getScanCodeState(int32_t deviceId, int32_t scanCode) const { 207 if (scanCode >= 0 && scanCode <= KEY_MAX) { 208 AutoMutex _l(mLock); 209 210 Device* device = getDeviceLocked(deviceId); 211 if (device != NULL) { 212 return getScanCodeStateLocked(device, scanCode); 213 } 214 } 215 return AKEY_STATE_UNKNOWN; 216} 217 218int32_t EventHub::getScanCodeStateLocked(Device* device, int32_t scanCode) const { 219 uint8_t key_bitmask[sizeof_bit_array(KEY_MAX + 1)]; 220 memset(key_bitmask, 0, sizeof(key_bitmask)); 221 if (ioctl(device->fd, 222 EVIOCGKEY(sizeof(key_bitmask)), key_bitmask) >= 0) { 223 return test_bit(scanCode, key_bitmask) ? AKEY_STATE_DOWN : AKEY_STATE_UP; 224 } 225 return AKEY_STATE_UNKNOWN; 226} 227 228int32_t EventHub::getKeyCodeState(int32_t deviceId, int32_t keyCode) const { 229 AutoMutex _l(mLock); 230 231 Device* device = getDeviceLocked(deviceId); 232 if (device != NULL) { 233 return getKeyCodeStateLocked(device, keyCode); 234 } 235 return AKEY_STATE_UNKNOWN; 236} 237 238int32_t EventHub::getKeyCodeStateLocked(Device* device, int32_t keyCode) const { 239 if (!device->keyMap.haveKeyLayout()) { 240 return AKEY_STATE_UNKNOWN; 241 } 242 243 Vector<int32_t> scanCodes; 244 device->keyMap.keyLayoutMap->findScanCodesForKey(keyCode, &scanCodes); 245 246 uint8_t key_bitmask[sizeof_bit_array(KEY_MAX + 1)]; 247 memset(key_bitmask, 0, sizeof(key_bitmask)); 248 if (ioctl(device->fd, EVIOCGKEY(sizeof(key_bitmask)), key_bitmask) >= 0) { 249 #if 0 250 for (size_t i=0; i<=KEY_MAX; i++) { 251 LOGI("(Scan code %d: down=%d)", i, test_bit(i, key_bitmask)); 252 } 253 #endif 254 const size_t N = scanCodes.size(); 255 for (size_t i=0; i<N && i<=KEY_MAX; i++) { 256 int32_t sc = scanCodes.itemAt(i); 257 //LOGI("Code %d: down=%d", sc, test_bit(sc, key_bitmask)); 258 if (sc >= 0 && sc <= KEY_MAX && test_bit(sc, key_bitmask)) { 259 return AKEY_STATE_DOWN; 260 } 261 } 262 return AKEY_STATE_UP; 263 } 264 return AKEY_STATE_UNKNOWN; 265} 266 267int32_t EventHub::getSwitchState(int32_t deviceId, int32_t sw) const { 268 if (sw >= 0 && sw <= SW_MAX) { 269 AutoMutex _l(mLock); 270 271 Device* device = getDeviceLocked(deviceId); 272 if (device != NULL) { 273 return getSwitchStateLocked(device, sw); 274 } 275 } 276 return AKEY_STATE_UNKNOWN; 277} 278 279int32_t EventHub::getSwitchStateLocked(Device* device, int32_t sw) const { 280 uint8_t sw_bitmask[sizeof_bit_array(SW_MAX + 1)]; 281 memset(sw_bitmask, 0, sizeof(sw_bitmask)); 282 if (ioctl(device->fd, 283 EVIOCGSW(sizeof(sw_bitmask)), sw_bitmask) >= 0) { 284 return test_bit(sw, sw_bitmask) ? AKEY_STATE_DOWN : AKEY_STATE_UP; 285 } 286 return AKEY_STATE_UNKNOWN; 287} 288 289bool EventHub::markSupportedKeyCodes(int32_t deviceId, size_t numCodes, 290 const int32_t* keyCodes, uint8_t* outFlags) const { 291 AutoMutex _l(mLock); 292 293 Device* device = getDeviceLocked(deviceId); 294 if (device != NULL) { 295 return markSupportedKeyCodesLocked(device, numCodes, keyCodes, outFlags); 296 } 297 return false; 298} 299 300bool EventHub::markSupportedKeyCodesLocked(Device* device, size_t numCodes, 301 const int32_t* keyCodes, uint8_t* outFlags) const { 302 if (!device->keyMap.haveKeyLayout() || !device->keyBitmask) { 303 return false; 304 } 305 306 Vector<int32_t> scanCodes; 307 for (size_t codeIndex = 0; codeIndex < numCodes; codeIndex++) { 308 scanCodes.clear(); 309 310 status_t err = device->keyMap.keyLayoutMap->findScanCodesForKey( 311 keyCodes[codeIndex], &scanCodes); 312 if (! err) { 313 // check the possible scan codes identified by the layout map against the 314 // map of codes actually emitted by the driver 315 for (size_t sc = 0; sc < scanCodes.size(); sc++) { 316 if (test_bit(scanCodes[sc], device->keyBitmask)) { 317 outFlags[codeIndex] = 1; 318 break; 319 } 320 } 321 } 322 } 323 return true; 324} 325 326status_t EventHub::mapKey(int32_t deviceId, int scancode, 327 int32_t* outKeycode, uint32_t* outFlags) const 328{ 329 AutoMutex _l(mLock); 330 Device* device = getDeviceLocked(deviceId); 331 332 if (device && device->keyMap.haveKeyLayout()) { 333 status_t err = device->keyMap.keyLayoutMap->mapKey(scancode, outKeycode, outFlags); 334 if (err == NO_ERROR) { 335 return NO_ERROR; 336 } 337 } 338 339 if (mBuiltInKeyboardId != -1) { 340 device = getDeviceLocked(mBuiltInKeyboardId); 341 342 if (device && device->keyMap.haveKeyLayout()) { 343 status_t err = device->keyMap.keyLayoutMap->mapKey(scancode, outKeycode, outFlags); 344 if (err == NO_ERROR) { 345 return NO_ERROR; 346 } 347 } 348 } 349 350 *outKeycode = 0; 351 *outFlags = 0; 352 return NAME_NOT_FOUND; 353} 354 355status_t EventHub::mapAxis(int32_t deviceId, int scancode, AxisInfo* outAxisInfo) const 356{ 357 AutoMutex _l(mLock); 358 Device* device = getDeviceLocked(deviceId); 359 360 if (device && device->keyMap.haveKeyLayout()) { 361 status_t err = device->keyMap.keyLayoutMap->mapAxis(scancode, outAxisInfo); 362 if (err == NO_ERROR) { 363 return NO_ERROR; 364 } 365 } 366 367 if (mBuiltInKeyboardId != -1) { 368 device = getDeviceLocked(mBuiltInKeyboardId); 369 370 if (device && device->keyMap.haveKeyLayout()) { 371 status_t err = device->keyMap.keyLayoutMap->mapAxis(scancode, outAxisInfo); 372 if (err == NO_ERROR) { 373 return NO_ERROR; 374 } 375 } 376 } 377 378 return NAME_NOT_FOUND; 379} 380 381void EventHub::addExcludedDevice(const char* deviceName) 382{ 383 AutoMutex _l(mLock); 384 385 String8 name(deviceName); 386 mExcludedDevices.push_back(name); 387} 388 389bool EventHub::hasLed(int32_t deviceId, int32_t led) const { 390 AutoMutex _l(mLock); 391 Device* device = getDeviceLocked(deviceId); 392 if (device) { 393 uint8_t bitmask[sizeof_bit_array(LED_MAX + 1)]; 394 memset(bitmask, 0, sizeof(bitmask)); 395 if (ioctl(device->fd, EVIOCGBIT(EV_LED, sizeof(bitmask)), bitmask) >= 0) { 396 if (test_bit(led, bitmask)) { 397 return true; 398 } 399 } 400 } 401 return false; 402} 403 404void EventHub::setLedState(int32_t deviceId, int32_t led, bool on) { 405 AutoMutex _l(mLock); 406 Device* device = getDeviceLocked(deviceId); 407 if (device) { 408 struct input_event ev; 409 ev.time.tv_sec = 0; 410 ev.time.tv_usec = 0; 411 ev.type = EV_LED; 412 ev.code = led; 413 ev.value = on ? 1 : 0; 414 415 ssize_t nWrite; 416 do { 417 nWrite = write(device->fd, &ev, sizeof(struct input_event)); 418 } while (nWrite == -1 && errno == EINTR); 419 } 420} 421 422void EventHub::getVirtualKeyDefinitions(int32_t deviceId, 423 Vector<VirtualKeyDefinition>& outVirtualKeys) const { 424 outVirtualKeys.clear(); 425 426 AutoMutex _l(mLock); 427 Device* device = getDeviceLocked(deviceId); 428 if (device && device->virtualKeyMap) { 429 outVirtualKeys.appendVector(device->virtualKeyMap->getVirtualKeys()); 430 } 431} 432 433EventHub::Device* EventHub::getDeviceLocked(int32_t deviceId) const { 434 if (deviceId == 0) { 435 deviceId = mBuiltInKeyboardId; 436 } 437 438 size_t numDevices = mDevices.size(); 439 for (size_t i = FIRST_ACTUAL_DEVICE_INDEX; i < numDevices; i++) { 440 Device* device = mDevices[i]; 441 if (device->id == deviceId) { 442 return device; 443 } 444 } 445 return NULL; 446} 447 448bool EventHub::getEvent(int timeoutMillis, RawEvent* outEvent) { 449 outEvent->deviceId = 0; 450 outEvent->type = 0; 451 outEvent->scanCode = 0; 452 outEvent->keyCode = 0; 453 outEvent->flags = 0; 454 outEvent->value = 0; 455 outEvent->when = 0; 456 457 // Note that we only allow one caller to getEvent(), so don't need 458 // to do locking here... only when adding/removing devices. 459 460 if (!mOpened) { 461 mError = openPlatformInput() ? NO_ERROR : UNKNOWN_ERROR; 462 mOpened = true; 463 mNeedToSendFinishedDeviceScan = true; 464 } 465 466 for (;;) { 467 // Report any devices that had last been added/removed. 468 if (mClosingDevices != NULL) { 469 Device* device = mClosingDevices; 470 LOGV("Reporting device closed: id=%d, name=%s\n", 471 device->id, device->path.string()); 472 mClosingDevices = device->next; 473 if (device->id == mBuiltInKeyboardId) { 474 outEvent->deviceId = 0; 475 } else { 476 outEvent->deviceId = device->id; 477 } 478 outEvent->type = DEVICE_REMOVED; 479 outEvent->when = systemTime(SYSTEM_TIME_MONOTONIC); 480 delete device; 481 mNeedToSendFinishedDeviceScan = true; 482 return true; 483 } 484 485 if (mOpeningDevices != NULL) { 486 Device* device = mOpeningDevices; 487 LOGV("Reporting device opened: id=%d, name=%s\n", 488 device->id, device->path.string()); 489 mOpeningDevices = device->next; 490 if (device->id == mBuiltInKeyboardId) { 491 outEvent->deviceId = 0; 492 } else { 493 outEvent->deviceId = device->id; 494 } 495 outEvent->type = DEVICE_ADDED; 496 outEvent->when = systemTime(SYSTEM_TIME_MONOTONIC); 497 mNeedToSendFinishedDeviceScan = true; 498 return true; 499 } 500 501 if (mNeedToSendFinishedDeviceScan) { 502 mNeedToSendFinishedDeviceScan = false; 503 outEvent->type = FINISHED_DEVICE_SCAN; 504 outEvent->when = systemTime(SYSTEM_TIME_MONOTONIC); 505 return true; 506 } 507 508 // Grab the next input event. 509 bool deviceWasRemoved = false; 510 for (;;) { 511 // Consume buffered input events, if any. 512 if (mInputBufferIndex < mInputBufferCount) { 513 const struct input_event& iev = mInputBufferData[mInputBufferIndex++]; 514 const Device* device = mDevices[mInputFdIndex]; 515 516 LOGV("%s got: t0=%d, t1=%d, type=%d, code=%d, v=%d", device->path.string(), 517 (int) iev.time.tv_sec, (int) iev.time.tv_usec, iev.type, iev.code, iev.value); 518 if (device->id == mBuiltInKeyboardId) { 519 outEvent->deviceId = 0; 520 } else { 521 outEvent->deviceId = device->id; 522 } 523 outEvent->type = iev.type; 524 outEvent->scanCode = iev.code; 525 outEvent->flags = 0; 526 if (iev.type == EV_KEY) { 527 outEvent->keyCode = AKEYCODE_UNKNOWN; 528 if (device->keyMap.haveKeyLayout()) { 529 status_t err = device->keyMap.keyLayoutMap->mapKey(iev.code, 530 &outEvent->keyCode, &outEvent->flags); 531 LOGV("iev.code=%d keyCode=%d flags=0x%08x err=%d\n", 532 iev.code, outEvent->keyCode, outEvent->flags, err); 533 } 534 } else { 535 outEvent->keyCode = iev.code; 536 } 537 outEvent->value = iev.value; 538 539 // Use an event timestamp in the same timebase as 540 // java.lang.System.nanoTime() and android.os.SystemClock.uptimeMillis() 541 // as expected by the rest of the system. 542 outEvent->when = systemTime(SYSTEM_TIME_MONOTONIC); 543 return true; 544 } 545 546 // Finish reading all events from devices identified in previous poll(). 547 // This code assumes that mInputDeviceIndex is initially 0 and that the 548 // revents member of pollfd is initialized to 0 when the device is first added. 549 // Since mFds[0] is used for inotify, we process regular events starting at index 1. 550 mInputFdIndex += 1; 551 if (mInputFdIndex >= mFds.size()) { 552 break; 553 } 554 555 const struct pollfd& pfd = mFds[mInputFdIndex]; 556 if (pfd.revents & POLLIN) { 557 int32_t readSize = read(pfd.fd, mInputBufferData, 558 sizeof(struct input_event) * INPUT_BUFFER_SIZE); 559 if (readSize < 0) { 560 if (errno == ENODEV) { 561 deviceWasRemoved = true; 562 break; 563 } 564 if (errno != EAGAIN && errno != EINTR) { 565 LOGW("could not get event (errno=%d)", errno); 566 } 567 } else if ((readSize % sizeof(struct input_event)) != 0) { 568 LOGE("could not get event (wrong size: %d)", readSize); 569 } else { 570 mInputBufferCount = size_t(readSize) / sizeof(struct input_event); 571 mInputBufferIndex = 0; 572 } 573 } 574 } 575 576 // Handle the case where a device has been removed but INotify has not yet noticed. 577 if (deviceWasRemoved) { 578 AutoMutex _l(mLock); 579 closeDeviceAtIndexLocked(mInputFdIndex); 580 continue; // report added or removed devices immediately 581 } 582 583#if HAVE_INOTIFY 584 // readNotify() will modify mFDs and mFDCount, so this must be done after 585 // processing all other events. 586 if(mFds[0].revents & POLLIN) { 587 readNotify(mFds[0].fd); 588 mFds.editItemAt(0).revents = 0; 589 continue; // report added or removed devices immediately 590 } 591#endif 592 593 // Poll for events. Mind the wake lock dance! 594 // We hold a wake lock at all times except during poll(). This works due to some 595 // subtle choreography. When a device driver has pending (unread) events, it acquires 596 // a kernel wake lock. However, once the last pending event has been read, the device 597 // driver will release the kernel wake lock. To prevent the system from going to sleep 598 // when this happens, the EventHub holds onto its own user wake lock while the client 599 // is processing events. Thus the system can only sleep if there are no events 600 // pending or currently being processed. 601 // 602 // The timeout is advisory only. If the device is asleep, it will not wake just to 603 // service the timeout. 604 release_wake_lock(WAKE_LOCK_ID); 605 606 int pollResult = poll(mFds.editArray(), mFds.size(), timeoutMillis); 607 608 acquire_wake_lock(PARTIAL_WAKE_LOCK, WAKE_LOCK_ID); 609 610 if (pollResult == 0) { 611 // Timed out. 612 return false; 613 } 614 if (pollResult < 0) { 615 if (errno != EINTR) { 616 LOGW("poll failed (errno=%d)\n", errno); 617 usleep(100000); 618 } 619 } 620 621 // Prepare to process all of the FDs we just polled. 622 mInputFdIndex = 0; 623 } 624} 625 626/* 627 * Open the platform-specific input device. 628 */ 629bool EventHub::openPlatformInput(void) { 630 /* 631 * Open platform-specific input device(s). 632 */ 633 int res, fd; 634 635#ifdef HAVE_INOTIFY 636 fd = inotify_init(); 637 res = inotify_add_watch(fd, DEVICE_PATH, IN_DELETE | IN_CREATE); 638 if(res < 0) { 639 LOGE("could not add watch for %s, %s\n", DEVICE_PATH, strerror(errno)); 640 } 641#else 642 /* 643 * The code in EventHub::getEvent assumes that mFDs[0] is an inotify fd. 644 * We allocate space for it and set it to something invalid. 645 */ 646 fd = -1; 647#endif 648 649 // Reserve fd index 0 for inotify. 650 struct pollfd pollfd; 651 pollfd.fd = fd; 652 pollfd.events = POLLIN; 653 pollfd.revents = 0; 654 mFds.push(pollfd); 655 mDevices.push(NULL); 656 657 res = scanDir(DEVICE_PATH); 658 if(res < 0) { 659 LOGE("scan dir failed for %s\n", DEVICE_PATH); 660 } 661 662 return true; 663} 664 665// ---------------------------------------------------------------------------- 666 667static bool containsNonZeroByte(const uint8_t* array, uint32_t startIndex, uint32_t endIndex) { 668 const uint8_t* end = array + endIndex; 669 array += startIndex; 670 while (array != end) { 671 if (*(array++) != 0) { 672 return true; 673 } 674 } 675 return false; 676} 677 678static const int32_t GAMEPAD_KEYCODES[] = { 679 AKEYCODE_BUTTON_A, AKEYCODE_BUTTON_B, AKEYCODE_BUTTON_C, 680 AKEYCODE_BUTTON_X, AKEYCODE_BUTTON_Y, AKEYCODE_BUTTON_Z, 681 AKEYCODE_BUTTON_L1, AKEYCODE_BUTTON_R1, 682 AKEYCODE_BUTTON_L2, AKEYCODE_BUTTON_R2, 683 AKEYCODE_BUTTON_THUMBL, AKEYCODE_BUTTON_THUMBR, 684 AKEYCODE_BUTTON_START, AKEYCODE_BUTTON_SELECT, AKEYCODE_BUTTON_MODE, 685 AKEYCODE_BUTTON_1, AKEYCODE_BUTTON_2, AKEYCODE_BUTTON_3, AKEYCODE_BUTTON_4, 686 AKEYCODE_BUTTON_5, AKEYCODE_BUTTON_6, AKEYCODE_BUTTON_7, AKEYCODE_BUTTON_8, 687 AKEYCODE_BUTTON_9, AKEYCODE_BUTTON_10, AKEYCODE_BUTTON_11, AKEYCODE_BUTTON_12, 688 AKEYCODE_BUTTON_13, AKEYCODE_BUTTON_14, AKEYCODE_BUTTON_15, AKEYCODE_BUTTON_16, 689}; 690 691int EventHub::openDevice(const char *devicePath) { 692 char buffer[80]; 693 694 LOGV("Opening device: %s", devicePath); 695 696 AutoMutex _l(mLock); 697 698 int fd = open(devicePath, O_RDWR); 699 if(fd < 0) { 700 LOGE("could not open %s, %s\n", devicePath, strerror(errno)); 701 return -1; 702 } 703 704 InputDeviceIdentifier identifier; 705 706 // Get device name. 707 if(ioctl(fd, EVIOCGNAME(sizeof(buffer) - 1), &buffer) < 1) { 708 //fprintf(stderr, "could not get device name for %s, %s\n", devicePath, strerror(errno)); 709 } else { 710 buffer[sizeof(buffer) - 1] = '\0'; 711 identifier.name.setTo(buffer); 712 } 713 714 // Check to see if the device is on our excluded list 715 List<String8>::iterator iter = mExcludedDevices.begin(); 716 List<String8>::iterator end = mExcludedDevices.end(); 717 for ( ; iter != end; iter++) { 718 const char* test = *iter; 719 if (identifier.name == test) { 720 LOGI("ignoring event id %s driver %s\n", devicePath, test); 721 close(fd); 722 return -1; 723 } 724 } 725 726 // Get device driver version. 727 int driverVersion; 728 if(ioctl(fd, EVIOCGVERSION, &driverVersion)) { 729 LOGE("could not get driver version for %s, %s\n", devicePath, strerror(errno)); 730 close(fd); 731 return -1; 732 } 733 734 // Get device identifier. 735 struct input_id inputId; 736 if(ioctl(fd, EVIOCGID, &inputId)) { 737 LOGE("could not get device input id for %s, %s\n", devicePath, strerror(errno)); 738 close(fd); 739 return -1; 740 } 741 identifier.bus = inputId.bustype; 742 identifier.product = inputId.product; 743 identifier.vendor = inputId.vendor; 744 identifier.version = inputId.version; 745 746 // Get device physical location. 747 if(ioctl(fd, EVIOCGPHYS(sizeof(buffer) - 1), &buffer) < 1) { 748 //fprintf(stderr, "could not get location for %s, %s\n", devicePath, strerror(errno)); 749 } else { 750 buffer[sizeof(buffer) - 1] = '\0'; 751 identifier.location.setTo(buffer); 752 } 753 754 // Get device unique id. 755 if(ioctl(fd, EVIOCGUNIQ(sizeof(buffer) - 1), &buffer) < 1) { 756 //fprintf(stderr, "could not get idstring for %s, %s\n", devicePath, strerror(errno)); 757 } else { 758 buffer[sizeof(buffer) - 1] = '\0'; 759 identifier.uniqueId.setTo(buffer); 760 } 761 762 // Make file descriptor non-blocking for use with poll(). 763 if (fcntl(fd, F_SETFL, O_NONBLOCK)) { 764 LOGE("Error %d making device file descriptor non-blocking.", errno); 765 close(fd); 766 return -1; 767 } 768 769 // Allocate device. (The device object takes ownership of the fd at this point.) 770 int32_t deviceId = mNextDeviceId++; 771 Device* device = new Device(fd, deviceId, String8(devicePath), identifier); 772 773#if 0 774 LOGI("add device %d: %s\n", deviceId, devicePath); 775 LOGI(" bus: %04x\n" 776 " vendor %04x\n" 777 " product %04x\n" 778 " version %04x\n", 779 identifier.bus, identifier.vendor, identifier.product, identifier.version); 780 LOGI(" name: \"%s\"\n", identifier.name.string()); 781 LOGI(" location: \"%s\"\n", identifier.location.string()); 782 LOGI(" unique id: \"%s\"\n", identifier.uniqueId.string()); 783 LOGI(" driver: v%d.%d.%d\n", 784 driverVersion >> 16, (driverVersion >> 8) & 0xff, driverVersion & 0xff); 785#endif 786 787 // Load the configuration file for the device. 788 loadConfiguration(device); 789 790 // Figure out the kinds of events the device reports. 791 uint8_t key_bitmask[sizeof_bit_array(KEY_MAX + 1)]; 792 memset(key_bitmask, 0, sizeof(key_bitmask)); 793 ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(key_bitmask)), key_bitmask); 794 795 uint8_t abs_bitmask[sizeof_bit_array(ABS_MAX + 1)]; 796 memset(abs_bitmask, 0, sizeof(abs_bitmask)); 797 ioctl(fd, EVIOCGBIT(EV_ABS, sizeof(abs_bitmask)), abs_bitmask); 798 799 uint8_t rel_bitmask[sizeof_bit_array(REL_MAX + 1)]; 800 memset(rel_bitmask, 0, sizeof(rel_bitmask)); 801 ioctl(fd, EVIOCGBIT(EV_REL, sizeof(rel_bitmask)), rel_bitmask); 802 803 uint8_t sw_bitmask[sizeof_bit_array(SW_MAX + 1)]; 804 memset(sw_bitmask, 0, sizeof(sw_bitmask)); 805 ioctl(fd, EVIOCGBIT(EV_SW, sizeof(sw_bitmask)), sw_bitmask); 806 807 device->keyBitmask = new uint8_t[sizeof(key_bitmask)]; 808 if (device->keyBitmask != NULL) { 809 memcpy(device->keyBitmask, key_bitmask, sizeof(key_bitmask)); 810 } else { 811 delete device; 812 LOGE("out of memory allocating key bitmask"); 813 return -1; 814 } 815 816 device->relBitmask = new uint8_t[sizeof(rel_bitmask)]; 817 if (device->relBitmask != NULL) { 818 memcpy(device->relBitmask, rel_bitmask, sizeof(rel_bitmask)); 819 } else { 820 delete device; 821 LOGE("out of memory allocating rel bitmask"); 822 return -1; 823 } 824 825 // See if this is a keyboard. Ignore everything in the button range except for 826 // joystick and gamepad buttons which are handled like keyboards for the most part. 827 bool haveKeyboardKeys = containsNonZeroByte(key_bitmask, 0, sizeof_bit_array(BTN_MISC)) 828 || containsNonZeroByte(key_bitmask, sizeof_bit_array(KEY_OK), 829 sizeof_bit_array(KEY_MAX + 1)); 830 bool haveGamepadButtons = containsNonZeroByte(key_bitmask, sizeof_bit_array(BTN_MISC), 831 sizeof_bit_array(BTN_MOUSE)) 832 || containsNonZeroByte(key_bitmask, sizeof_bit_array(BTN_JOYSTICK), 833 sizeof_bit_array(BTN_DIGI)); 834 if (haveKeyboardKeys || haveGamepadButtons) { 835 device->classes |= INPUT_DEVICE_CLASS_KEYBOARD; 836 } 837 838 // See if this is a cursor device such as a trackball or mouse. 839 if (test_bit(BTN_MOUSE, key_bitmask) 840 && test_bit(REL_X, rel_bitmask) 841 && test_bit(REL_Y, rel_bitmask)) { 842 device->classes |= INPUT_DEVICE_CLASS_CURSOR; 843 } 844 845 // See if this is a touch pad. 846 // Is this a new modern multi-touch driver? 847 if (test_bit(ABS_MT_POSITION_X, abs_bitmask) 848 && test_bit(ABS_MT_POSITION_Y, abs_bitmask)) { 849 // Some joysticks such as the PS3 controller report axes that conflict 850 // with the ABS_MT range. Try to confirm that the device really is 851 // a touch screen. 852 if (test_bit(BTN_TOUCH, key_bitmask) || !haveGamepadButtons) { 853 device->classes |= INPUT_DEVICE_CLASS_TOUCH | INPUT_DEVICE_CLASS_TOUCH_MT; 854 } 855 // Is this an old style single-touch driver? 856 } else if (test_bit(BTN_TOUCH, key_bitmask) 857 && test_bit(ABS_X, abs_bitmask) 858 && test_bit(ABS_Y, abs_bitmask)) { 859 device->classes |= INPUT_DEVICE_CLASS_TOUCH; 860 } 861 862 // See if this device is a joystick. 863 // Ignore touchscreens because they use the same absolute axes for other purposes. 864 // Assumes that joysticks always have gamepad buttons in order to distinguish them 865 // from other devices such as accelerometers that also have absolute axes. 866 if (haveGamepadButtons 867 && !(device->classes & INPUT_DEVICE_CLASS_TOUCH) 868 && containsNonZeroByte(abs_bitmask, 0, sizeof_bit_array(ABS_MAX + 1))) { 869 device->classes |= INPUT_DEVICE_CLASS_JOYSTICK; 870 } 871 872 // figure out the switches this device reports 873 bool haveSwitches = false; 874 for (int i=0; i<EV_SW; i++) { 875 //LOGI("Device %d sw %d: has=%d", device->id, i, test_bit(i, sw_bitmask)); 876 if (test_bit(i, sw_bitmask)) { 877 haveSwitches = true; 878 if (mSwitches[i] == 0) { 879 mSwitches[i] = device->id; 880 } 881 } 882 } 883 if (haveSwitches) { 884 device->classes |= INPUT_DEVICE_CLASS_SWITCH; 885 } 886 887 if ((device->classes & INPUT_DEVICE_CLASS_TOUCH)) { 888 // Load the virtual keys for the touch screen, if any. 889 // We do this now so that we can make sure to load the keymap if necessary. 890 status_t status = loadVirtualKeyMap(device); 891 if (!status) { 892 device->classes |= INPUT_DEVICE_CLASS_KEYBOARD; 893 } 894 } 895 896 // Load the key map. 897 // We need to do this for joysticks too because the key layout may specify axes. 898 status_t keyMapStatus = NAME_NOT_FOUND; 899 if (device->classes & (INPUT_DEVICE_CLASS_KEYBOARD | INPUT_DEVICE_CLASS_JOYSTICK)) { 900 // Load the keymap for the device. 901 keyMapStatus = loadKeyMap(device); 902 } 903 904 // Configure the keyboard, gamepad or virtual keyboard. 905 if (device->classes & INPUT_DEVICE_CLASS_KEYBOARD) { 906 // Set system properties for the keyboard. 907 setKeyboardProperties(device, false); 908 909 // Register the keyboard as a built-in keyboard if it is eligible. 910 if (!keyMapStatus 911 && mBuiltInKeyboardId == -1 912 && isEligibleBuiltInKeyboard(device->identifier, 913 device->configuration, &device->keyMap)) { 914 mBuiltInKeyboardId = device->id; 915 setKeyboardProperties(device, true); 916 } 917 918 // 'Q' key support = cheap test of whether this is an alpha-capable kbd 919 if (hasKeycodeLocked(device, AKEYCODE_Q)) { 920 device->classes |= INPUT_DEVICE_CLASS_ALPHAKEY; 921 } 922 923 // See if this device has a DPAD. 924 if (hasKeycodeLocked(device, AKEYCODE_DPAD_UP) && 925 hasKeycodeLocked(device, AKEYCODE_DPAD_DOWN) && 926 hasKeycodeLocked(device, AKEYCODE_DPAD_LEFT) && 927 hasKeycodeLocked(device, AKEYCODE_DPAD_RIGHT) && 928 hasKeycodeLocked(device, AKEYCODE_DPAD_CENTER)) { 929 device->classes |= INPUT_DEVICE_CLASS_DPAD; 930 } 931 932 // See if this device has a gamepad. 933 for (size_t i = 0; i < sizeof(GAMEPAD_KEYCODES)/sizeof(GAMEPAD_KEYCODES[0]); i++) { 934 if (hasKeycodeLocked(device, GAMEPAD_KEYCODES[i])) { 935 device->classes |= INPUT_DEVICE_CLASS_GAMEPAD; 936 break; 937 } 938 } 939 } 940 941 // If the device isn't recognized as something we handle, don't monitor it. 942 if (device->classes == 0) { 943 LOGV("Dropping device: id=%d, path='%s', name='%s'", 944 deviceId, devicePath, device->identifier.name.string()); 945 delete device; 946 return -1; 947 } 948 949 // Determine whether the device is external or internal. 950 if (isExternalDevice(device)) { 951 device->classes |= INPUT_DEVICE_CLASS_EXTERNAL; 952 } 953 954 LOGI("New device: id=%d, fd=%d, path='%s', name='%s', classes=0x%x, " 955 "configuration='%s', keyLayout='%s', keyCharacterMap='%s', builtinKeyboard=%s", 956 deviceId, fd, devicePath, device->identifier.name.string(), 957 device->classes, 958 device->configurationFile.string(), 959 device->keyMap.keyLayoutFile.string(), 960 device->keyMap.keyCharacterMapFile.string(), 961 toString(mBuiltInKeyboardId == deviceId)); 962 963 struct pollfd pollfd; 964 pollfd.fd = fd; 965 pollfd.events = POLLIN; 966 pollfd.revents = 0; 967 mFds.push(pollfd); 968 mDevices.push(device); 969 970 device->next = mOpeningDevices; 971 mOpeningDevices = device; 972 return 0; 973} 974 975void EventHub::loadConfiguration(Device* device) { 976 device->configurationFile = getInputDeviceConfigurationFilePathByDeviceIdentifier( 977 device->identifier, INPUT_DEVICE_CONFIGURATION_FILE_TYPE_CONFIGURATION); 978 if (device->configurationFile.isEmpty()) { 979 LOGD("No input device configuration file found for device '%s'.", 980 device->identifier.name.string()); 981 } else { 982 status_t status = PropertyMap::load(device->configurationFile, 983 &device->configuration); 984 if (status) { 985 LOGE("Error loading input device configuration file for device '%s'. " 986 "Using default configuration.", 987 device->identifier.name.string()); 988 } 989 } 990} 991 992status_t EventHub::loadVirtualKeyMap(Device* device) { 993 // The virtual key map is supplied by the kernel as a system board property file. 994 String8 path; 995 path.append("/sys/board_properties/virtualkeys."); 996 path.append(device->identifier.name); 997 if (access(path.string(), R_OK)) { 998 return NAME_NOT_FOUND; 999 } 1000 return VirtualKeyMap::load(path, &device->virtualKeyMap); 1001} 1002 1003status_t EventHub::loadKeyMap(Device* device) { 1004 return device->keyMap.load(device->identifier, device->configuration); 1005} 1006 1007void EventHub::setKeyboardProperties(Device* device, bool builtInKeyboard) { 1008 int32_t id = builtInKeyboard ? 0 : device->id; 1009 android::setKeyboardProperties(id, device->identifier, 1010 device->keyMap.keyLayoutFile, device->keyMap.keyCharacterMapFile); 1011} 1012 1013void EventHub::clearKeyboardProperties(Device* device, bool builtInKeyboard) { 1014 int32_t id = builtInKeyboard ? 0 : device->id; 1015 android::clearKeyboardProperties(id); 1016} 1017 1018bool EventHub::isExternalDevice(Device* device) { 1019 if (device->configuration) { 1020 bool value; 1021 if (device->configuration->tryGetProperty(String8("device.internal"), value) 1022 && value) { 1023 return false; 1024 } 1025 } 1026 return device->identifier.bus == BUS_USB || device->identifier.bus == BUS_BLUETOOTH; 1027} 1028 1029bool EventHub::hasKeycodeLocked(Device* device, int keycode) const { 1030 if (!device->keyMap.haveKeyLayout() || !device->keyBitmask) { 1031 return false; 1032 } 1033 1034 Vector<int32_t> scanCodes; 1035 device->keyMap.keyLayoutMap->findScanCodesForKey(keycode, &scanCodes); 1036 const size_t N = scanCodes.size(); 1037 for (size_t i=0; i<N && i<=KEY_MAX; i++) { 1038 int32_t sc = scanCodes.itemAt(i); 1039 if (sc >= 0 && sc <= KEY_MAX && test_bit(sc, device->keyBitmask)) { 1040 return true; 1041 } 1042 } 1043 1044 return false; 1045} 1046 1047int EventHub::closeDevice(const char *devicePath) { 1048 AutoMutex _l(mLock); 1049 1050 for (size_t i = FIRST_ACTUAL_DEVICE_INDEX; i < mDevices.size(); i++) { 1051 Device* device = mDevices[i]; 1052 if (device->path == devicePath) { 1053 return closeDeviceAtIndexLocked(i); 1054 } 1055 } 1056 LOGV("Remove device: %s not found, device may already have been removed.", devicePath); 1057 return -1; 1058} 1059 1060int EventHub::closeDeviceAtIndexLocked(int index) { 1061 Device* device = mDevices[index]; 1062 LOGI("Removed device: path=%s name=%s id=%d fd=%d classes=0x%x\n", 1063 device->path.string(), device->identifier.name.string(), device->id, 1064 device->fd, device->classes); 1065 1066 for (int j=0; j<EV_SW; j++) { 1067 if (mSwitches[j] == device->id) { 1068 mSwitches[j] = 0; 1069 } 1070 } 1071 1072 if (device->id == mBuiltInKeyboardId) { 1073 LOGW("built-in keyboard device %s (id=%d) is closing! the apps will not like this", 1074 device->path.string(), mBuiltInKeyboardId); 1075 mBuiltInKeyboardId = -1; 1076 clearKeyboardProperties(device, true); 1077 } 1078 clearKeyboardProperties(device, false); 1079 1080 mFds.removeAt(index); 1081 mDevices.removeAt(index); 1082 device->close(); 1083 1084 // Unlink for opening devices list if it is present. 1085 Device* pred = NULL; 1086 bool found = false; 1087 for (Device* entry = mOpeningDevices; entry != NULL; ) { 1088 if (entry == device) { 1089 found = true; 1090 break; 1091 } 1092 pred = entry; 1093 entry = entry->next; 1094 } 1095 if (found) { 1096 // Unlink the device from the opening devices list then delete it. 1097 // We don't need to tell the client that the device was closed because 1098 // it does not even know it was opened in the first place. 1099 LOGI("Device %s was immediately closed after opening.", device->path.string()); 1100 if (pred) { 1101 pred->next = device->next; 1102 } else { 1103 mOpeningDevices = device->next; 1104 } 1105 delete device; 1106 } else { 1107 // Link into closing devices list. 1108 // The device will be deleted later after we have informed the client. 1109 device->next = mClosingDevices; 1110 mClosingDevices = device; 1111 } 1112 return 0; 1113} 1114 1115int EventHub::readNotify(int nfd) { 1116#ifdef HAVE_INOTIFY 1117 int res; 1118 char devname[PATH_MAX]; 1119 char *filename; 1120 char event_buf[512]; 1121 int event_size; 1122 int event_pos = 0; 1123 struct inotify_event *event; 1124 1125 LOGV("EventHub::readNotify nfd: %d\n", nfd); 1126 res = read(nfd, event_buf, sizeof(event_buf)); 1127 if(res < (int)sizeof(*event)) { 1128 if(errno == EINTR) 1129 return 0; 1130 LOGW("could not get event, %s\n", strerror(errno)); 1131 return 1; 1132 } 1133 //printf("got %d bytes of event information\n", res); 1134 1135 strcpy(devname, DEVICE_PATH); 1136 filename = devname + strlen(devname); 1137 *filename++ = '/'; 1138 1139 while(res >= (int)sizeof(*event)) { 1140 event = (struct inotify_event *)(event_buf + event_pos); 1141 //printf("%d: %08x \"%s\"\n", event->wd, event->mask, event->len ? event->name : ""); 1142 if(event->len) { 1143 strcpy(filename, event->name); 1144 if(event->mask & IN_CREATE) { 1145 openDevice(devname); 1146 } 1147 else { 1148 closeDevice(devname); 1149 } 1150 } 1151 event_size = sizeof(*event) + event->len; 1152 res -= event_size; 1153 event_pos += event_size; 1154 } 1155#endif 1156 return 0; 1157} 1158 1159int EventHub::scanDir(const char *dirname) 1160{ 1161 char devname[PATH_MAX]; 1162 char *filename; 1163 DIR *dir; 1164 struct dirent *de; 1165 dir = opendir(dirname); 1166 if(dir == NULL) 1167 return -1; 1168 strcpy(devname, dirname); 1169 filename = devname + strlen(devname); 1170 *filename++ = '/'; 1171 while((de = readdir(dir))) { 1172 if(de->d_name[0] == '.' && 1173 (de->d_name[1] == '\0' || 1174 (de->d_name[1] == '.' && de->d_name[2] == '\0'))) 1175 continue; 1176 strcpy(filename, de->d_name); 1177 openDevice(devname); 1178 } 1179 closedir(dir); 1180 return 0; 1181} 1182 1183void EventHub::dump(String8& dump) { 1184 dump.append("Event Hub State:\n"); 1185 1186 { // acquire lock 1187 AutoMutex _l(mLock); 1188 1189 dump.appendFormat(INDENT "BuiltInKeyboardId: %d\n", mBuiltInKeyboardId); 1190 1191 dump.append(INDENT "Devices:\n"); 1192 1193 for (size_t i = FIRST_ACTUAL_DEVICE_INDEX; i < mDevices.size(); i++) { 1194 const Device* device = mDevices[i]; 1195 if (device) { 1196 if (mBuiltInKeyboardId == device->id) { 1197 dump.appendFormat(INDENT2 "%d: %s (aka device 0 - built-in keyboard)\n", 1198 device->id, device->identifier.name.string()); 1199 } else { 1200 dump.appendFormat(INDENT2 "%d: %s\n", device->id, 1201 device->identifier.name.string()); 1202 } 1203 dump.appendFormat(INDENT3 "Classes: 0x%08x\n", device->classes); 1204 dump.appendFormat(INDENT3 "Path: %s\n", device->path.string()); 1205 dump.appendFormat(INDENT3 "Location: %s\n", device->identifier.location.string()); 1206 dump.appendFormat(INDENT3 "UniqueId: %s\n", device->identifier.uniqueId.string()); 1207 dump.appendFormat(INDENT3 "Identifier: bus=0x%04x, vendor=0x%04x, " 1208 "product=0x%04x, version=0x%04x\n", 1209 device->identifier.bus, device->identifier.vendor, 1210 device->identifier.product, device->identifier.version); 1211 dump.appendFormat(INDENT3 "KeyLayoutFile: %s\n", 1212 device->keyMap.keyLayoutFile.string()); 1213 dump.appendFormat(INDENT3 "KeyCharacterMapFile: %s\n", 1214 device->keyMap.keyCharacterMapFile.string()); 1215 dump.appendFormat(INDENT3 "ConfigurationFile: %s\n", 1216 device->configurationFile.string()); 1217 } 1218 } 1219 } // release lock 1220} 1221 1222}; // namespace android 1223