EventHub.cpp revision 9e8e40cb5f8aeb0702002eee60d1ce394bf699ee
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(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 release_wake_lock(WAKE_LOCK_ID); 602 603 int pollResult = poll(mFds.editArray(), mFds.size(), -1); 604 605 acquire_wake_lock(PARTIAL_WAKE_LOCK, WAKE_LOCK_ID); 606 607 if (pollResult <= 0) { 608 if (errno != EINTR) { 609 LOGW("poll failed (errno=%d)\n", errno); 610 usleep(100000); 611 } 612 } 613 614 // Prepare to process all of the FDs we just polled. 615 mInputFdIndex = 0; 616 } 617} 618 619/* 620 * Open the platform-specific input device. 621 */ 622bool EventHub::openPlatformInput(void) { 623 /* 624 * Open platform-specific input device(s). 625 */ 626 int res, fd; 627 628#ifdef HAVE_INOTIFY 629 fd = inotify_init(); 630 res = inotify_add_watch(fd, DEVICE_PATH, IN_DELETE | IN_CREATE); 631 if(res < 0) { 632 LOGE("could not add watch for %s, %s\n", DEVICE_PATH, strerror(errno)); 633 } 634#else 635 /* 636 * The code in EventHub::getEvent assumes that mFDs[0] is an inotify fd. 637 * We allocate space for it and set it to something invalid. 638 */ 639 fd = -1; 640#endif 641 642 // Reserve fd index 0 for inotify. 643 struct pollfd pollfd; 644 pollfd.fd = fd; 645 pollfd.events = POLLIN; 646 pollfd.revents = 0; 647 mFds.push(pollfd); 648 mDevices.push(NULL); 649 650 res = scanDir(DEVICE_PATH); 651 if(res < 0) { 652 LOGE("scan dir failed for %s\n", DEVICE_PATH); 653 } 654 655 return true; 656} 657 658// ---------------------------------------------------------------------------- 659 660static bool containsNonZeroByte(const uint8_t* array, uint32_t startIndex, uint32_t endIndex) { 661 const uint8_t* end = array + endIndex; 662 array += startIndex; 663 while (array != end) { 664 if (*(array++) != 0) { 665 return true; 666 } 667 } 668 return false; 669} 670 671static const int32_t GAMEPAD_KEYCODES[] = { 672 AKEYCODE_BUTTON_A, AKEYCODE_BUTTON_B, AKEYCODE_BUTTON_C, 673 AKEYCODE_BUTTON_X, AKEYCODE_BUTTON_Y, AKEYCODE_BUTTON_Z, 674 AKEYCODE_BUTTON_L1, AKEYCODE_BUTTON_R1, 675 AKEYCODE_BUTTON_L2, AKEYCODE_BUTTON_R2, 676 AKEYCODE_BUTTON_THUMBL, AKEYCODE_BUTTON_THUMBR, 677 AKEYCODE_BUTTON_START, AKEYCODE_BUTTON_SELECT, AKEYCODE_BUTTON_MODE, 678 AKEYCODE_BUTTON_1, AKEYCODE_BUTTON_2, AKEYCODE_BUTTON_3, AKEYCODE_BUTTON_4, 679 AKEYCODE_BUTTON_5, AKEYCODE_BUTTON_6, AKEYCODE_BUTTON_7, AKEYCODE_BUTTON_8, 680 AKEYCODE_BUTTON_9, AKEYCODE_BUTTON_10, AKEYCODE_BUTTON_11, AKEYCODE_BUTTON_12, 681 AKEYCODE_BUTTON_13, AKEYCODE_BUTTON_14, AKEYCODE_BUTTON_15, AKEYCODE_BUTTON_16, 682}; 683 684int EventHub::openDevice(const char *devicePath) { 685 char buffer[80]; 686 687 LOGV("Opening device: %s", devicePath); 688 689 AutoMutex _l(mLock); 690 691 int fd = open(devicePath, O_RDWR); 692 if(fd < 0) { 693 LOGE("could not open %s, %s\n", devicePath, strerror(errno)); 694 return -1; 695 } 696 697 InputDeviceIdentifier identifier; 698 699 // Get device name. 700 if(ioctl(fd, EVIOCGNAME(sizeof(buffer) - 1), &buffer) < 1) { 701 //fprintf(stderr, "could not get device name for %s, %s\n", devicePath, strerror(errno)); 702 } else { 703 buffer[sizeof(buffer) - 1] = '\0'; 704 identifier.name.setTo(buffer); 705 } 706 707 // Check to see if the device is on our excluded list 708 List<String8>::iterator iter = mExcludedDevices.begin(); 709 List<String8>::iterator end = mExcludedDevices.end(); 710 for ( ; iter != end; iter++) { 711 const char* test = *iter; 712 if (identifier.name == test) { 713 LOGI("ignoring event id %s driver %s\n", devicePath, test); 714 close(fd); 715 return -1; 716 } 717 } 718 719 // Get device driver version. 720 int driverVersion; 721 if(ioctl(fd, EVIOCGVERSION, &driverVersion)) { 722 LOGE("could not get driver version for %s, %s\n", devicePath, strerror(errno)); 723 close(fd); 724 return -1; 725 } 726 727 // Get device identifier. 728 struct input_id inputId; 729 if(ioctl(fd, EVIOCGID, &inputId)) { 730 LOGE("could not get device input id for %s, %s\n", devicePath, strerror(errno)); 731 close(fd); 732 return -1; 733 } 734 identifier.bus = inputId.bustype; 735 identifier.product = inputId.product; 736 identifier.vendor = inputId.vendor; 737 identifier.version = inputId.version; 738 739 // Get device physical location. 740 if(ioctl(fd, EVIOCGPHYS(sizeof(buffer) - 1), &buffer) < 1) { 741 //fprintf(stderr, "could not get location for %s, %s\n", devicePath, strerror(errno)); 742 } else { 743 buffer[sizeof(buffer) - 1] = '\0'; 744 identifier.location.setTo(buffer); 745 } 746 747 // Get device unique id. 748 if(ioctl(fd, EVIOCGUNIQ(sizeof(buffer) - 1), &buffer) < 1) { 749 //fprintf(stderr, "could not get idstring for %s, %s\n", devicePath, strerror(errno)); 750 } else { 751 buffer[sizeof(buffer) - 1] = '\0'; 752 identifier.uniqueId.setTo(buffer); 753 } 754 755 // Make file descriptor non-blocking for use with poll(). 756 if (fcntl(fd, F_SETFL, O_NONBLOCK)) { 757 LOGE("Error %d making device file descriptor non-blocking.", errno); 758 close(fd); 759 return -1; 760 } 761 762 // Allocate device. (The device object takes ownership of the fd at this point.) 763 int32_t deviceId = mNextDeviceId++; 764 Device* device = new Device(fd, deviceId, String8(devicePath), identifier); 765 766#if 0 767 LOGI("add device %d: %s\n", deviceId, devicePath); 768 LOGI(" bus: %04x\n" 769 " vendor %04x\n" 770 " product %04x\n" 771 " version %04x\n", 772 identifier.bus, identifier.vendor, identifier.product, identifier.version); 773 LOGI(" name: \"%s\"\n", identifier.name.string()); 774 LOGI(" location: \"%s\"\n", identifier.location.string()); 775 LOGI(" unique id: \"%s\"\n", identifier.uniqueId.string()); 776 LOGI(" driver: v%d.%d.%d\n", 777 driverVersion >> 16, (driverVersion >> 8) & 0xff, driverVersion & 0xff); 778#endif 779 780 // Load the configuration file for the device. 781 loadConfiguration(device); 782 783 // Figure out the kinds of events the device reports. 784 uint8_t key_bitmask[sizeof_bit_array(KEY_MAX + 1)]; 785 memset(key_bitmask, 0, sizeof(key_bitmask)); 786 ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(key_bitmask)), key_bitmask); 787 788 uint8_t abs_bitmask[sizeof_bit_array(ABS_MAX + 1)]; 789 memset(abs_bitmask, 0, sizeof(abs_bitmask)); 790 ioctl(fd, EVIOCGBIT(EV_ABS, sizeof(abs_bitmask)), abs_bitmask); 791 792 uint8_t rel_bitmask[sizeof_bit_array(REL_MAX + 1)]; 793 memset(rel_bitmask, 0, sizeof(rel_bitmask)); 794 ioctl(fd, EVIOCGBIT(EV_REL, sizeof(rel_bitmask)), rel_bitmask); 795 796 uint8_t sw_bitmask[sizeof_bit_array(SW_MAX + 1)]; 797 memset(sw_bitmask, 0, sizeof(sw_bitmask)); 798 ioctl(fd, EVIOCGBIT(EV_SW, sizeof(sw_bitmask)), sw_bitmask); 799 800 device->keyBitmask = new uint8_t[sizeof(key_bitmask)]; 801 if (device->keyBitmask != NULL) { 802 memcpy(device->keyBitmask, key_bitmask, sizeof(key_bitmask)); 803 } else { 804 delete device; 805 LOGE("out of memory allocating key bitmask"); 806 return -1; 807 } 808 809 device->relBitmask = new uint8_t[sizeof(rel_bitmask)]; 810 if (device->relBitmask != NULL) { 811 memcpy(device->relBitmask, rel_bitmask, sizeof(rel_bitmask)); 812 } else { 813 delete device; 814 LOGE("out of memory allocating rel bitmask"); 815 return -1; 816 } 817 818 // See if this is a keyboard. Ignore everything in the button range except for 819 // joystick and gamepad buttons which are handled like keyboards for the most part. 820 bool haveKeyboardKeys = containsNonZeroByte(key_bitmask, 0, sizeof_bit_array(BTN_MISC)) 821 || containsNonZeroByte(key_bitmask, sizeof_bit_array(KEY_OK), 822 sizeof_bit_array(KEY_MAX + 1)); 823 bool haveGamepadButtons = containsNonZeroByte(key_bitmask, sizeof_bit_array(BTN_MISC), 824 sizeof_bit_array(BTN_MOUSE)) 825 || containsNonZeroByte(key_bitmask, sizeof_bit_array(BTN_JOYSTICK), 826 sizeof_bit_array(BTN_DIGI)); 827 if (haveKeyboardKeys || haveGamepadButtons) { 828 device->classes |= INPUT_DEVICE_CLASS_KEYBOARD; 829 } 830 831 // See if this is a cursor device such as a trackball or mouse. 832 if (test_bit(BTN_MOUSE, key_bitmask) 833 && test_bit(REL_X, rel_bitmask) 834 && test_bit(REL_Y, rel_bitmask)) { 835 device->classes |= INPUT_DEVICE_CLASS_CURSOR; 836 } 837 838 // See if this is a touch pad. 839 // Is this a new modern multi-touch driver? 840 if (test_bit(ABS_MT_POSITION_X, abs_bitmask) 841 && test_bit(ABS_MT_POSITION_Y, abs_bitmask)) { 842 // Some joysticks such as the PS3 controller report axes that conflict 843 // with the ABS_MT range. Try to confirm that the device really is 844 // a touch screen. 845 if (test_bit(BTN_TOUCH, key_bitmask) || !haveGamepadButtons) { 846 device->classes |= INPUT_DEVICE_CLASS_TOUCH | INPUT_DEVICE_CLASS_TOUCH_MT; 847 } 848 // Is this an old style single-touch driver? 849 } else if (test_bit(BTN_TOUCH, key_bitmask) 850 && test_bit(ABS_X, abs_bitmask) 851 && test_bit(ABS_Y, abs_bitmask)) { 852 device->classes |= INPUT_DEVICE_CLASS_TOUCH; 853 } 854 855 // See if this device is a joystick. 856 // Ignore touchscreens because they use the same absolute axes for other purposes. 857 // Assumes that joysticks always have gamepad buttons in order to distinguish them 858 // from other devices such as accelerometers that also have absolute axes. 859 if (haveGamepadButtons 860 && !(device->classes & INPUT_DEVICE_CLASS_TOUCH) 861 && containsNonZeroByte(abs_bitmask, 0, sizeof_bit_array(ABS_MAX + 1))) { 862 device->classes |= INPUT_DEVICE_CLASS_JOYSTICK; 863 } 864 865 // figure out the switches this device reports 866 bool haveSwitches = false; 867 for (int i=0; i<EV_SW; i++) { 868 //LOGI("Device %d sw %d: has=%d", device->id, i, test_bit(i, sw_bitmask)); 869 if (test_bit(i, sw_bitmask)) { 870 haveSwitches = true; 871 if (mSwitches[i] == 0) { 872 mSwitches[i] = device->id; 873 } 874 } 875 } 876 if (haveSwitches) { 877 device->classes |= INPUT_DEVICE_CLASS_SWITCH; 878 } 879 880 if ((device->classes & INPUT_DEVICE_CLASS_TOUCH)) { 881 // Load the virtual keys for the touch screen, if any. 882 // We do this now so that we can make sure to load the keymap if necessary. 883 status_t status = loadVirtualKeyMap(device); 884 if (!status) { 885 device->classes |= INPUT_DEVICE_CLASS_KEYBOARD; 886 } 887 } 888 889 // Load the key map. 890 // We need to do this for joysticks too because the key layout may specify axes. 891 status_t keyMapStatus = NAME_NOT_FOUND; 892 if (device->classes & (INPUT_DEVICE_CLASS_KEYBOARD | INPUT_DEVICE_CLASS_JOYSTICK)) { 893 // Load the keymap for the device. 894 keyMapStatus = loadKeyMap(device); 895 } 896 897 // Configure the keyboard, gamepad or virtual keyboard. 898 if (device->classes & INPUT_DEVICE_CLASS_KEYBOARD) { 899 // Set system properties for the keyboard. 900 setKeyboardProperties(device, false); 901 902 // Register the keyboard as a built-in keyboard if it is eligible. 903 if (!keyMapStatus 904 && mBuiltInKeyboardId == -1 905 && isEligibleBuiltInKeyboard(device->identifier, 906 device->configuration, &device->keyMap)) { 907 mBuiltInKeyboardId = device->id; 908 setKeyboardProperties(device, true); 909 } 910 911 // 'Q' key support = cheap test of whether this is an alpha-capable kbd 912 if (hasKeycodeLocked(device, AKEYCODE_Q)) { 913 device->classes |= INPUT_DEVICE_CLASS_ALPHAKEY; 914 } 915 916 // See if this device has a DPAD. 917 if (hasKeycodeLocked(device, AKEYCODE_DPAD_UP) && 918 hasKeycodeLocked(device, AKEYCODE_DPAD_DOWN) && 919 hasKeycodeLocked(device, AKEYCODE_DPAD_LEFT) && 920 hasKeycodeLocked(device, AKEYCODE_DPAD_RIGHT) && 921 hasKeycodeLocked(device, AKEYCODE_DPAD_CENTER)) { 922 device->classes |= INPUT_DEVICE_CLASS_DPAD; 923 } 924 925 // See if this device has a gamepad. 926 for (size_t i = 0; i < sizeof(GAMEPAD_KEYCODES)/sizeof(GAMEPAD_KEYCODES[0]); i++) { 927 if (hasKeycodeLocked(device, GAMEPAD_KEYCODES[i])) { 928 device->classes |= INPUT_DEVICE_CLASS_GAMEPAD; 929 break; 930 } 931 } 932 } 933 934 // If the device isn't recognized as something we handle, don't monitor it. 935 if (device->classes == 0) { 936 LOGV("Dropping device: id=%d, path='%s', name='%s'", 937 deviceId, devicePath, device->identifier.name.string()); 938 delete device; 939 return -1; 940 } 941 942 // Determine whether the device is external or internal. 943 if (isExternalDevice(device)) { 944 device->classes |= INPUT_DEVICE_CLASS_EXTERNAL; 945 } 946 947 LOGI("New device: id=%d, fd=%d, path='%s', name='%s', classes=0x%x, " 948 "configuration='%s', keyLayout='%s', keyCharacterMap='%s', builtinKeyboard=%s", 949 deviceId, fd, devicePath, device->identifier.name.string(), 950 device->classes, 951 device->configurationFile.string(), 952 device->keyMap.keyLayoutFile.string(), 953 device->keyMap.keyCharacterMapFile.string(), 954 toString(mBuiltInKeyboardId == deviceId)); 955 956 struct pollfd pollfd; 957 pollfd.fd = fd; 958 pollfd.events = POLLIN; 959 pollfd.revents = 0; 960 mFds.push(pollfd); 961 mDevices.push(device); 962 963 device->next = mOpeningDevices; 964 mOpeningDevices = device; 965 return 0; 966} 967 968void EventHub::loadConfiguration(Device* device) { 969 device->configurationFile = getInputDeviceConfigurationFilePathByDeviceIdentifier( 970 device->identifier, INPUT_DEVICE_CONFIGURATION_FILE_TYPE_CONFIGURATION); 971 if (device->configurationFile.isEmpty()) { 972 LOGD("No input device configuration file found for device '%s'.", 973 device->identifier.name.string()); 974 } else { 975 status_t status = PropertyMap::load(device->configurationFile, 976 &device->configuration); 977 if (status) { 978 LOGE("Error loading input device configuration file for device '%s'. " 979 "Using default configuration.", 980 device->identifier.name.string()); 981 } 982 } 983} 984 985status_t EventHub::loadVirtualKeyMap(Device* device) { 986 // The virtual key map is supplied by the kernel as a system board property file. 987 String8 path; 988 path.append("/sys/board_properties/virtualkeys."); 989 path.append(device->identifier.name); 990 if (access(path.string(), R_OK)) { 991 return NAME_NOT_FOUND; 992 } 993 return VirtualKeyMap::load(path, &device->virtualKeyMap); 994} 995 996status_t EventHub::loadKeyMap(Device* device) { 997 return device->keyMap.load(device->identifier, device->configuration); 998} 999 1000void EventHub::setKeyboardProperties(Device* device, bool builtInKeyboard) { 1001 int32_t id = builtInKeyboard ? 0 : device->id; 1002 android::setKeyboardProperties(id, device->identifier, 1003 device->keyMap.keyLayoutFile, device->keyMap.keyCharacterMapFile); 1004} 1005 1006void EventHub::clearKeyboardProperties(Device* device, bool builtInKeyboard) { 1007 int32_t id = builtInKeyboard ? 0 : device->id; 1008 android::clearKeyboardProperties(id); 1009} 1010 1011bool EventHub::isExternalDevice(Device* device) { 1012 if (device->configuration) { 1013 bool value; 1014 if (device->configuration->tryGetProperty(String8("device.internal"), value) 1015 && value) { 1016 return false; 1017 } 1018 } 1019 return device->identifier.bus == BUS_USB || device->identifier.bus == BUS_BLUETOOTH; 1020} 1021 1022bool EventHub::hasKeycodeLocked(Device* device, int keycode) const { 1023 if (!device->keyMap.haveKeyLayout() || !device->keyBitmask) { 1024 return false; 1025 } 1026 1027 Vector<int32_t> scanCodes; 1028 device->keyMap.keyLayoutMap->findScanCodesForKey(keycode, &scanCodes); 1029 const size_t N = scanCodes.size(); 1030 for (size_t i=0; i<N && i<=KEY_MAX; i++) { 1031 int32_t sc = scanCodes.itemAt(i); 1032 if (sc >= 0 && sc <= KEY_MAX && test_bit(sc, device->keyBitmask)) { 1033 return true; 1034 } 1035 } 1036 1037 return false; 1038} 1039 1040int EventHub::closeDevice(const char *devicePath) { 1041 AutoMutex _l(mLock); 1042 1043 for (size_t i = FIRST_ACTUAL_DEVICE_INDEX; i < mDevices.size(); i++) { 1044 Device* device = mDevices[i]; 1045 if (device->path == devicePath) { 1046 return closeDeviceAtIndexLocked(i); 1047 } 1048 } 1049 LOGV("Remove device: %s not found, device may already have been removed.", devicePath); 1050 return -1; 1051} 1052 1053int EventHub::closeDeviceAtIndexLocked(int index) { 1054 Device* device = mDevices[index]; 1055 LOGI("Removed device: path=%s name=%s id=%d fd=%d classes=0x%x\n", 1056 device->path.string(), device->identifier.name.string(), device->id, 1057 device->fd, device->classes); 1058 1059 for (int j=0; j<EV_SW; j++) { 1060 if (mSwitches[j] == device->id) { 1061 mSwitches[j] = 0; 1062 } 1063 } 1064 1065 if (device->id == mBuiltInKeyboardId) { 1066 LOGW("built-in keyboard device %s (id=%d) is closing! the apps will not like this", 1067 device->path.string(), mBuiltInKeyboardId); 1068 mBuiltInKeyboardId = -1; 1069 clearKeyboardProperties(device, true); 1070 } 1071 clearKeyboardProperties(device, false); 1072 1073 mFds.removeAt(index); 1074 mDevices.removeAt(index); 1075 device->close(); 1076 1077 device->next = mClosingDevices; 1078 mClosingDevices = device; 1079 return 0; 1080} 1081 1082int EventHub::readNotify(int nfd) { 1083#ifdef HAVE_INOTIFY 1084 int res; 1085 char devname[PATH_MAX]; 1086 char *filename; 1087 char event_buf[512]; 1088 int event_size; 1089 int event_pos = 0; 1090 struct inotify_event *event; 1091 1092 LOGV("EventHub::readNotify nfd: %d\n", nfd); 1093 res = read(nfd, event_buf, sizeof(event_buf)); 1094 if(res < (int)sizeof(*event)) { 1095 if(errno == EINTR) 1096 return 0; 1097 LOGW("could not get event, %s\n", strerror(errno)); 1098 return 1; 1099 } 1100 //printf("got %d bytes of event information\n", res); 1101 1102 strcpy(devname, DEVICE_PATH); 1103 filename = devname + strlen(devname); 1104 *filename++ = '/'; 1105 1106 while(res >= (int)sizeof(*event)) { 1107 event = (struct inotify_event *)(event_buf + event_pos); 1108 //printf("%d: %08x \"%s\"\n", event->wd, event->mask, event->len ? event->name : ""); 1109 if(event->len) { 1110 strcpy(filename, event->name); 1111 if(event->mask & IN_CREATE) { 1112 openDevice(devname); 1113 } 1114 else { 1115 closeDevice(devname); 1116 } 1117 } 1118 event_size = sizeof(*event) + event->len; 1119 res -= event_size; 1120 event_pos += event_size; 1121 } 1122#endif 1123 return 0; 1124} 1125 1126int EventHub::scanDir(const char *dirname) 1127{ 1128 char devname[PATH_MAX]; 1129 char *filename; 1130 DIR *dir; 1131 struct dirent *de; 1132 dir = opendir(dirname); 1133 if(dir == NULL) 1134 return -1; 1135 strcpy(devname, dirname); 1136 filename = devname + strlen(devname); 1137 *filename++ = '/'; 1138 while((de = readdir(dir))) { 1139 if(de->d_name[0] == '.' && 1140 (de->d_name[1] == '\0' || 1141 (de->d_name[1] == '.' && de->d_name[2] == '\0'))) 1142 continue; 1143 strcpy(filename, de->d_name); 1144 openDevice(devname); 1145 } 1146 closedir(dir); 1147 return 0; 1148} 1149 1150void EventHub::dump(String8& dump) { 1151 dump.append("Event Hub State:\n"); 1152 1153 { // acquire lock 1154 AutoMutex _l(mLock); 1155 1156 dump.appendFormat(INDENT "BuiltInKeyboardId: %d\n", mBuiltInKeyboardId); 1157 1158 dump.append(INDENT "Devices:\n"); 1159 1160 for (size_t i = FIRST_ACTUAL_DEVICE_INDEX; i < mDevices.size(); i++) { 1161 const Device* device = mDevices[i]; 1162 if (device) { 1163 if (mBuiltInKeyboardId == device->id) { 1164 dump.appendFormat(INDENT2 "%d: %s (aka device 0 - built-in keyboard)\n", 1165 device->id, device->identifier.name.string()); 1166 } else { 1167 dump.appendFormat(INDENT2 "%d: %s\n", device->id, 1168 device->identifier.name.string()); 1169 } 1170 dump.appendFormat(INDENT3 "Classes: 0x%08x\n", device->classes); 1171 dump.appendFormat(INDENT3 "Path: %s\n", device->path.string()); 1172 dump.appendFormat(INDENT3 "Location: %s\n", device->identifier.location.string()); 1173 dump.appendFormat(INDENT3 "UniqueId: %s\n", device->identifier.uniqueId.string()); 1174 dump.appendFormat(INDENT3 "Identifier: bus=0x%04x, vendor=0x%04x, " 1175 "product=0x%04x, version=0x%04x\n", 1176 device->identifier.bus, device->identifier.vendor, 1177 device->identifier.product, device->identifier.version); 1178 dump.appendFormat(INDENT3 "KeyLayoutFile: %s\n", 1179 device->keyMap.keyLayoutFile.string()); 1180 dump.appendFormat(INDENT3 "KeyCharacterMapFile: %s\n", 1181 device->keyMap.keyCharacterMapFile.string()); 1182 dump.appendFormat(INDENT3 "ConfigurationFile: %s\n", 1183 device->configurationFile.string()); 1184 } 1185 } 1186 } // release lock 1187} 1188 1189}; // namespace android 1190