1// 2// Copyright 2005 The Android Open Source Project 3// 4// Handle events, like key input and vsync. 5// 6// The goal is to provide an optimized solution for Linux, not an 7// implementation that works well across all platforms. We expect 8// events to arrive on file descriptors, so that we can use a select() 9// select() call to sleep. 10// 11// We can't select() on anything but network sockets in Windows, so we 12// provide an alternative implementation of waitEvent for that platform. 13// 14#define LOG_TAG "EventHub" 15 16//#define LOG_NDEBUG 0 17 18#include <ui/EventHub.h> 19#include <ui/KeycodeLabels.h> 20#include <hardware_legacy/power.h> 21 22#include <cutils/properties.h> 23#include <utils/Log.h> 24#include <utils/Timers.h> 25#include <utils/threads.h> 26#include <utils/Errors.h> 27 28#include <stdlib.h> 29#include <stdio.h> 30#include <unistd.h> 31#include <fcntl.h> 32#include <memory.h> 33#include <errno.h> 34#include <assert.h> 35 36#include "KeyLayoutMap.h" 37 38#include <string.h> 39#include <stdint.h> 40#include <dirent.h> 41#ifdef HAVE_INOTIFY 42# include <sys/inotify.h> 43#endif 44#ifdef HAVE_ANDROID_OS 45# include <sys/limits.h> /* not part of Linux */ 46#endif 47#include <sys/poll.h> 48#include <sys/ioctl.h> 49 50/* this macro is used to tell if "bit" is set in "array" 51 * it selects a byte from the array, and does a boolean AND 52 * operation with a byte that only has the relevant bit set. 53 * eg. to check for the 12th bit, we do (array[1] & 1<<4) 54 */ 55#define test_bit(bit, array) (array[bit/8] & (1<<(bit%8))) 56 57/* this macro computes the number of bytes needed to represent a bit array of the specified size */ 58#define sizeof_bit_array(bits) ((bits + 7) / 8) 59 60#define ID_MASK 0x0000ffff 61#define SEQ_MASK 0x7fff0000 62#define SEQ_SHIFT 16 63 64#ifndef ABS_MT_TOUCH_MAJOR 65#define ABS_MT_TOUCH_MAJOR 0x30 /* Major axis of touching ellipse */ 66#endif 67 68#ifndef ABS_MT_POSITION_X 69#define ABS_MT_POSITION_X 0x35 /* Center X ellipse position */ 70#endif 71 72#ifndef ABS_MT_POSITION_Y 73#define ABS_MT_POSITION_Y 0x36 /* Center Y ellipse position */ 74#endif 75 76#define INDENT " " 77#define INDENT2 " " 78#define INDENT3 " " 79 80namespace android { 81 82static const char *WAKE_LOCK_ID = "KeyEvents"; 83static const char *device_path = "/dev/input"; 84 85/* return the larger integer */ 86static inline int max(int v1, int v2) 87{ 88 return (v1 > v2) ? v1 : v2; 89} 90 91static inline const char* toString(bool value) { 92 return value ? "true" : "false"; 93} 94 95EventHub::device_t::device_t(int32_t _id, const char* _path, const char* name) 96 : id(_id), path(_path), name(name), classes(0) 97 , keyBitmask(NULL), layoutMap(new KeyLayoutMap()), fd(-1), next(NULL) { 98} 99 100EventHub::device_t::~device_t() { 101 delete [] keyBitmask; 102 delete layoutMap; 103} 104 105EventHub::EventHub(void) 106 : mError(NO_INIT), mHaveFirstKeyboard(false), mFirstKeyboardId(0) 107 , mDevicesById(0), mNumDevicesById(0) 108 , mOpeningDevices(0), mClosingDevices(0) 109 , mDevices(0), mFDs(0), mFDCount(0), mOpened(false), mNeedToSendFinishedDeviceScan(false) 110 , mInputBufferIndex(0), mInputBufferCount(0), mInputDeviceIndex(0) 111{ 112 acquire_wake_lock(PARTIAL_WAKE_LOCK, WAKE_LOCK_ID); 113#ifdef EV_SW 114 memset(mSwitches, 0, sizeof(mSwitches)); 115#endif 116} 117 118/* 119 * Clean up. 120 */ 121EventHub::~EventHub(void) 122{ 123 release_wake_lock(WAKE_LOCK_ID); 124 // we should free stuff here... 125} 126 127status_t EventHub::errorCheck() const 128{ 129 return mError; 130} 131 132String8 EventHub::getDeviceName(int32_t deviceId) const 133{ 134 AutoMutex _l(mLock); 135 device_t* device = getDeviceLocked(deviceId); 136 if (device == NULL) return String8(); 137 return device->name; 138} 139 140uint32_t EventHub::getDeviceClasses(int32_t deviceId) const 141{ 142 AutoMutex _l(mLock); 143 device_t* device = getDeviceLocked(deviceId); 144 if (device == NULL) return 0; 145 return device->classes; 146} 147 148status_t EventHub::getAbsoluteAxisInfo(int32_t deviceId, int axis, 149 RawAbsoluteAxisInfo* outAxisInfo) const { 150 outAxisInfo->clear(); 151 152 AutoMutex _l(mLock); 153 device_t* device = getDeviceLocked(deviceId); 154 if (device == NULL) return -1; 155 156 struct input_absinfo info; 157 158 if(ioctl(device->fd, EVIOCGABS(axis), &info)) { 159 LOGW("Error reading absolute controller %d for device %s fd %d\n", 160 axis, device->name.string(), device->fd); 161 return -errno; 162 } 163 164 if (info.minimum != info.maximum) { 165 outAxisInfo->valid = true; 166 outAxisInfo->minValue = info.minimum; 167 outAxisInfo->maxValue = info.maximum; 168 outAxisInfo->flat = info.flat; 169 outAxisInfo->fuzz = info.fuzz; 170 } 171 return OK; 172} 173 174int32_t EventHub::getScanCodeState(int32_t deviceId, int32_t scanCode) const { 175 if (scanCode >= 0 && scanCode <= KEY_MAX) { 176 AutoMutex _l(mLock); 177 178 device_t* device = getDeviceLocked(deviceId); 179 if (device != NULL) { 180 return getScanCodeStateLocked(device, scanCode); 181 } 182 } 183 return AKEY_STATE_UNKNOWN; 184} 185 186int32_t EventHub::getScanCodeStateLocked(device_t* device, int32_t scanCode) const { 187 uint8_t key_bitmask[sizeof_bit_array(KEY_MAX + 1)]; 188 memset(key_bitmask, 0, sizeof(key_bitmask)); 189 if (ioctl(device->fd, 190 EVIOCGKEY(sizeof(key_bitmask)), key_bitmask) >= 0) { 191 return test_bit(scanCode, key_bitmask) ? AKEY_STATE_DOWN : AKEY_STATE_UP; 192 } 193 return AKEY_STATE_UNKNOWN; 194} 195 196int32_t EventHub::getKeyCodeState(int32_t deviceId, int32_t keyCode) const { 197 AutoMutex _l(mLock); 198 199 device_t* device = getDeviceLocked(deviceId); 200 if (device != NULL) { 201 return getKeyCodeStateLocked(device, keyCode); 202 } 203 return AKEY_STATE_UNKNOWN; 204} 205 206int32_t EventHub::getKeyCodeStateLocked(device_t* device, int32_t keyCode) const { 207 Vector<int32_t> scanCodes; 208 device->layoutMap->findScancodes(keyCode, &scanCodes); 209 210 uint8_t key_bitmask[sizeof_bit_array(KEY_MAX + 1)]; 211 memset(key_bitmask, 0, sizeof(key_bitmask)); 212 if (ioctl(device->fd, EVIOCGKEY(sizeof(key_bitmask)), key_bitmask) >= 0) { 213 #if 0 214 for (size_t i=0; i<=KEY_MAX; i++) { 215 LOGI("(Scan code %d: down=%d)", i, test_bit(i, key_bitmask)); 216 } 217 #endif 218 const size_t N = scanCodes.size(); 219 for (size_t i=0; i<N && i<=KEY_MAX; i++) { 220 int32_t sc = scanCodes.itemAt(i); 221 //LOGI("Code %d: down=%d", sc, test_bit(sc, key_bitmask)); 222 if (sc >= 0 && sc <= KEY_MAX && test_bit(sc, key_bitmask)) { 223 return AKEY_STATE_DOWN; 224 } 225 } 226 return AKEY_STATE_UP; 227 } 228 return AKEY_STATE_UNKNOWN; 229} 230 231int32_t EventHub::getSwitchState(int32_t deviceId, int32_t sw) const { 232#ifdef EV_SW 233 if (sw >= 0 && sw <= SW_MAX) { 234 AutoMutex _l(mLock); 235 236 device_t* device = getDeviceLocked(deviceId); 237 if (device != NULL) { 238 return getSwitchStateLocked(device, sw); 239 } 240 } 241#endif 242 return AKEY_STATE_UNKNOWN; 243} 244 245int32_t EventHub::getSwitchStateLocked(device_t* device, int32_t sw) const { 246 uint8_t sw_bitmask[sizeof_bit_array(SW_MAX + 1)]; 247 memset(sw_bitmask, 0, sizeof(sw_bitmask)); 248 if (ioctl(device->fd, 249 EVIOCGSW(sizeof(sw_bitmask)), sw_bitmask) >= 0) { 250 return test_bit(sw, sw_bitmask) ? AKEY_STATE_DOWN : AKEY_STATE_UP; 251 } 252 return AKEY_STATE_UNKNOWN; 253} 254 255bool EventHub::markSupportedKeyCodes(int32_t deviceId, size_t numCodes, 256 const int32_t* keyCodes, uint8_t* outFlags) const { 257 AutoMutex _l(mLock); 258 259 device_t* device = getDeviceLocked(deviceId); 260 if (device != NULL) { 261 return markSupportedKeyCodesLocked(device, numCodes, keyCodes, outFlags); 262 } 263 return false; 264} 265 266bool EventHub::markSupportedKeyCodesLocked(device_t* device, size_t numCodes, 267 const int32_t* keyCodes, uint8_t* outFlags) const { 268 if (device->layoutMap == NULL || device->keyBitmask == NULL) { 269 return false; 270 } 271 272 Vector<int32_t> scanCodes; 273 for (size_t codeIndex = 0; codeIndex < numCodes; codeIndex++) { 274 scanCodes.clear(); 275 276 status_t err = device->layoutMap->findScancodes(keyCodes[codeIndex], &scanCodes); 277 if (! err) { 278 // check the possible scan codes identified by the layout map against the 279 // map of codes actually emitted by the driver 280 for (size_t sc = 0; sc < scanCodes.size(); sc++) { 281 if (test_bit(scanCodes[sc], device->keyBitmask)) { 282 outFlags[codeIndex] = 1; 283 break; 284 } 285 } 286 } 287 } 288 return true; 289} 290 291status_t EventHub::scancodeToKeycode(int32_t deviceId, int scancode, 292 int32_t* outKeycode, uint32_t* outFlags) const 293{ 294 AutoMutex _l(mLock); 295 device_t* device = getDeviceLocked(deviceId); 296 297 if (device != NULL && device->layoutMap != NULL) { 298 status_t err = device->layoutMap->map(scancode, outKeycode, outFlags); 299 if (err == NO_ERROR) { 300 return NO_ERROR; 301 } 302 } 303 304 if (mHaveFirstKeyboard) { 305 device = getDeviceLocked(mFirstKeyboardId); 306 307 if (device != NULL && device->layoutMap != NULL) { 308 status_t err = device->layoutMap->map(scancode, outKeycode, outFlags); 309 if (err == NO_ERROR) { 310 return NO_ERROR; 311 } 312 } 313 } 314 315 *outKeycode = 0; 316 *outFlags = 0; 317 return NAME_NOT_FOUND; 318} 319 320void EventHub::addExcludedDevice(const char* deviceName) 321{ 322 AutoMutex _l(mLock); 323 324 String8 name(deviceName); 325 mExcludedDevices.push_back(name); 326} 327 328EventHub::device_t* EventHub::getDeviceLocked(int32_t deviceId) const 329{ 330 if (deviceId == 0) deviceId = mFirstKeyboardId; 331 int32_t id = deviceId & ID_MASK; 332 if (id >= mNumDevicesById || id < 0) return NULL; 333 device_t* dev = mDevicesById[id].device; 334 if (dev == NULL) return NULL; 335 if (dev->id == deviceId) { 336 return dev; 337 } 338 return NULL; 339} 340 341bool EventHub::getEvent(RawEvent* outEvent) 342{ 343 outEvent->deviceId = 0; 344 outEvent->type = 0; 345 outEvent->scanCode = 0; 346 outEvent->keyCode = 0; 347 outEvent->flags = 0; 348 outEvent->value = 0; 349 outEvent->when = 0; 350 351 // Note that we only allow one caller to getEvent(), so don't need 352 // to do locking here... only when adding/removing devices. 353 354 if (!mOpened) { 355 mError = openPlatformInput() ? NO_ERROR : UNKNOWN_ERROR; 356 mOpened = true; 357 mNeedToSendFinishedDeviceScan = true; 358 } 359 360 for (;;) { 361 // Report any devices that had last been added/removed. 362 if (mClosingDevices != NULL) { 363 device_t* device = mClosingDevices; 364 LOGV("Reporting device closed: id=0x%x, name=%s\n", 365 device->id, device->path.string()); 366 mClosingDevices = device->next; 367 if (device->id == mFirstKeyboardId) { 368 outEvent->deviceId = 0; 369 } else { 370 outEvent->deviceId = device->id; 371 } 372 outEvent->type = DEVICE_REMOVED; 373 outEvent->when = systemTime(SYSTEM_TIME_MONOTONIC); 374 delete device; 375 mNeedToSendFinishedDeviceScan = true; 376 return true; 377 } 378 379 if (mOpeningDevices != NULL) { 380 device_t* device = mOpeningDevices; 381 LOGV("Reporting device opened: id=0x%x, name=%s\n", 382 device->id, device->path.string()); 383 mOpeningDevices = device->next; 384 if (device->id == mFirstKeyboardId) { 385 outEvent->deviceId = 0; 386 } else { 387 outEvent->deviceId = device->id; 388 } 389 outEvent->type = DEVICE_ADDED; 390 outEvent->when = systemTime(SYSTEM_TIME_MONOTONIC); 391 mNeedToSendFinishedDeviceScan = true; 392 return true; 393 } 394 395 if (mNeedToSendFinishedDeviceScan) { 396 mNeedToSendFinishedDeviceScan = false; 397 outEvent->type = FINISHED_DEVICE_SCAN; 398 outEvent->when = systemTime(SYSTEM_TIME_MONOTONIC); 399 return true; 400 } 401 402 // Grab the next input event. 403 for (;;) { 404 // Consume buffered input events, if any. 405 if (mInputBufferIndex < mInputBufferCount) { 406 const struct input_event& iev = mInputBufferData[mInputBufferIndex++]; 407 const device_t* device = mDevices[mInputDeviceIndex]; 408 409 LOGV("%s got: t0=%d, t1=%d, type=%d, code=%d, v=%d", device->path.string(), 410 (int) iev.time.tv_sec, (int) iev.time.tv_usec, iev.type, iev.code, iev.value); 411 if (device->id == mFirstKeyboardId) { 412 outEvent->deviceId = 0; 413 } else { 414 outEvent->deviceId = device->id; 415 } 416 outEvent->type = iev.type; 417 outEvent->scanCode = iev.code; 418 if (iev.type == EV_KEY) { 419 status_t err = device->layoutMap->map(iev.code, 420 & outEvent->keyCode, & outEvent->flags); 421 LOGV("iev.code=%d keyCode=%d flags=0x%08x err=%d\n", 422 iev.code, outEvent->keyCode, outEvent->flags, err); 423 if (err != 0) { 424 outEvent->keyCode = AKEYCODE_UNKNOWN; 425 outEvent->flags = 0; 426 } 427 } else { 428 outEvent->keyCode = iev.code; 429 } 430 outEvent->value = iev.value; 431 432 // Use an event timestamp in the same timebase as 433 // java.lang.System.nanoTime() and android.os.SystemClock.uptimeMillis() 434 // as expected by the rest of the system. 435 outEvent->when = systemTime(SYSTEM_TIME_MONOTONIC); 436 return true; 437 } 438 439 // Finish reading all events from devices identified in previous poll(). 440 // This code assumes that mInputDeviceIndex is initially 0 and that the 441 // revents member of pollfd is initialized to 0 when the device is first added. 442 // Since mFDs[0] is used for inotify, we process regular events starting at index 1. 443 mInputDeviceIndex += 1; 444 if (mInputDeviceIndex >= mFDCount) { 445 break; 446 } 447 448 const struct pollfd& pfd = mFDs[mInputDeviceIndex]; 449 if (pfd.revents & POLLIN) { 450 int32_t readSize = read(pfd.fd, mInputBufferData, 451 sizeof(struct input_event) * INPUT_BUFFER_SIZE); 452 if (readSize < 0) { 453 if (errno != EAGAIN && errno != EINTR) { 454 LOGW("could not get event (errno=%d)", errno); 455 } 456 } else if ((readSize % sizeof(struct input_event)) != 0) { 457 LOGE("could not get event (wrong size: %d)", readSize); 458 } else { 459 mInputBufferCount = readSize / sizeof(struct input_event); 460 mInputBufferIndex = 0; 461 } 462 } 463 } 464 465#if HAVE_INOTIFY 466 // readNotify() will modify mFDs and mFDCount, so this must be done after 467 // processing all other events. 468 if(mFDs[0].revents & POLLIN) { 469 readNotify(mFDs[0].fd); 470 mFDs[0].revents = 0; 471 continue; // report added or removed devices immediately 472 } 473#endif 474 475 mInputDeviceIndex = 0; 476 477 // Poll for events. Mind the wake lock dance! 478 // We hold a wake lock at all times except during poll(). This works due to some 479 // subtle choreography. When a device driver has pending (unread) events, it acquires 480 // a kernel wake lock. However, once the last pending event has been read, the device 481 // driver will release the kernel wake lock. To prevent the system from going to sleep 482 // when this happens, the EventHub holds onto its own user wake lock while the client 483 // is processing events. Thus the system can only sleep if there are no events 484 // pending or currently being processed. 485 release_wake_lock(WAKE_LOCK_ID); 486 487 int pollResult = poll(mFDs, mFDCount, -1); 488 489 acquire_wake_lock(PARTIAL_WAKE_LOCK, WAKE_LOCK_ID); 490 491 if (pollResult <= 0) { 492 if (errno != EINTR) { 493 LOGW("poll failed (errno=%d)\n", errno); 494 usleep(100000); 495 } 496 } 497 } 498} 499 500/* 501 * Open the platform-specific input device. 502 */ 503bool EventHub::openPlatformInput(void) 504{ 505 /* 506 * Open platform-specific input device(s). 507 */ 508 int res; 509 510 mFDCount = 1; 511 mFDs = (pollfd *)calloc(1, sizeof(mFDs[0])); 512 mDevices = (device_t **)calloc(1, sizeof(mDevices[0])); 513 mFDs[0].events = POLLIN; 514 mFDs[0].revents = 0; 515 mDevices[0] = NULL; 516#ifdef HAVE_INOTIFY 517 mFDs[0].fd = inotify_init(); 518 res = inotify_add_watch(mFDs[0].fd, device_path, IN_DELETE | IN_CREATE); 519 if(res < 0) { 520 LOGE("could not add watch for %s, %s\n", device_path, strerror(errno)); 521 } 522#else 523 /* 524 * The code in EventHub::getEvent assumes that mFDs[0] is an inotify fd. 525 * We allocate space for it and set it to something invalid. 526 */ 527 mFDs[0].fd = -1; 528#endif 529 530 res = scanDir(device_path); 531 if(res < 0) { 532 LOGE("scan dir failed for %s\n", device_path); 533 } 534 535 return true; 536} 537 538// ---------------------------------------------------------------------------- 539 540static bool containsNonZeroByte(const uint8_t* array, uint32_t startIndex, uint32_t endIndex) { 541 const uint8_t* end = array + endIndex; 542 array += startIndex; 543 while (array != end) { 544 if (*(array++) != 0) { 545 return true; 546 } 547 } 548 return false; 549} 550 551static const int32_t GAMEPAD_KEYCODES[] = { 552 AKEYCODE_BUTTON_A, AKEYCODE_BUTTON_B, AKEYCODE_BUTTON_C, 553 AKEYCODE_BUTTON_X, AKEYCODE_BUTTON_Y, AKEYCODE_BUTTON_Z, 554 AKEYCODE_BUTTON_L1, AKEYCODE_BUTTON_R1, 555 AKEYCODE_BUTTON_L2, AKEYCODE_BUTTON_R2, 556 AKEYCODE_BUTTON_THUMBL, AKEYCODE_BUTTON_THUMBR, 557 AKEYCODE_BUTTON_START, AKEYCODE_BUTTON_SELECT, AKEYCODE_BUTTON_MODE 558}; 559 560int EventHub::openDevice(const char *deviceName) { 561 int version; 562 int fd; 563 struct pollfd *new_mFDs; 564 device_t **new_devices; 565 char **new_device_names; 566 char name[80]; 567 char location[80]; 568 char idstr[80]; 569 struct input_id id; 570 571 LOGV("Opening device: %s", deviceName); 572 573 AutoMutex _l(mLock); 574 575 fd = open(deviceName, O_RDWR); 576 if(fd < 0) { 577 LOGE("could not open %s, %s\n", deviceName, strerror(errno)); 578 return -1; 579 } 580 581 if(ioctl(fd, EVIOCGVERSION, &version)) { 582 LOGE("could not get driver version for %s, %s\n", deviceName, strerror(errno)); 583 return -1; 584 } 585 if(ioctl(fd, EVIOCGID, &id)) { 586 LOGE("could not get driver id for %s, %s\n", deviceName, strerror(errno)); 587 return -1; 588 } 589 name[sizeof(name) - 1] = '\0'; 590 location[sizeof(location) - 1] = '\0'; 591 idstr[sizeof(idstr) - 1] = '\0'; 592 if(ioctl(fd, EVIOCGNAME(sizeof(name) - 1), &name) < 1) { 593 //fprintf(stderr, "could not get device name for %s, %s\n", deviceName, strerror(errno)); 594 name[0] = '\0'; 595 } 596 597 // check to see if the device is on our excluded list 598 List<String8>::iterator iter = mExcludedDevices.begin(); 599 List<String8>::iterator end = mExcludedDevices.end(); 600 for ( ; iter != end; iter++) { 601 const char* test = *iter; 602 if (strcmp(name, test) == 0) { 603 LOGI("ignoring event id %s driver %s\n", deviceName, test); 604 close(fd); 605 return -1; 606 } 607 } 608 609 if(ioctl(fd, EVIOCGPHYS(sizeof(location) - 1), &location) < 1) { 610 //fprintf(stderr, "could not get location for %s, %s\n", deviceName, strerror(errno)); 611 location[0] = '\0'; 612 } 613 if(ioctl(fd, EVIOCGUNIQ(sizeof(idstr) - 1), &idstr) < 1) { 614 //fprintf(stderr, "could not get idstring for %s, %s\n", deviceName, strerror(errno)); 615 idstr[0] = '\0'; 616 } 617 618 if (fcntl(fd, F_SETFL, O_NONBLOCK)) { 619 LOGE("Error %d making device file descriptor non-blocking.", errno); 620 close(fd); 621 return -1; 622 } 623 624 int devid = 0; 625 while (devid < mNumDevicesById) { 626 if (mDevicesById[devid].device == NULL) { 627 break; 628 } 629 devid++; 630 } 631 if (devid >= mNumDevicesById) { 632 device_ent* new_devids = (device_ent*)realloc(mDevicesById, 633 sizeof(mDevicesById[0]) * (devid + 1)); 634 if (new_devids == NULL) { 635 LOGE("out of memory"); 636 return -1; 637 } 638 mDevicesById = new_devids; 639 mNumDevicesById = devid+1; 640 mDevicesById[devid].device = NULL; 641 mDevicesById[devid].seq = 0; 642 } 643 644 mDevicesById[devid].seq = (mDevicesById[devid].seq+(1<<SEQ_SHIFT))&SEQ_MASK; 645 if (mDevicesById[devid].seq == 0) { 646 mDevicesById[devid].seq = 1<<SEQ_SHIFT; 647 } 648 649 new_mFDs = (pollfd*)realloc(mFDs, sizeof(mFDs[0]) * (mFDCount + 1)); 650 new_devices = (device_t**)realloc(mDevices, sizeof(mDevices[0]) * (mFDCount + 1)); 651 if (new_mFDs == NULL || new_devices == NULL) { 652 LOGE("out of memory"); 653 return -1; 654 } 655 mFDs = new_mFDs; 656 mDevices = new_devices; 657 658#if 0 659 LOGI("add device %d: %s\n", mFDCount, deviceName); 660 LOGI(" bus: %04x\n" 661 " vendor %04x\n" 662 " product %04x\n" 663 " version %04x\n", 664 id.bustype, id.vendor, id.product, id.version); 665 LOGI(" name: \"%s\"\n", name); 666 LOGI(" location: \"%s\"\n" 667 " id: \"%s\"\n", location, idstr); 668 LOGI(" version: %d.%d.%d\n", 669 version >> 16, (version >> 8) & 0xff, version & 0xff); 670#endif 671 672 device_t* device = new device_t(devid|mDevicesById[devid].seq, deviceName, name); 673 if (device == NULL) { 674 LOGE("out of memory"); 675 return -1; 676 } 677 678 device->fd = fd; 679 mFDs[mFDCount].fd = fd; 680 mFDs[mFDCount].events = POLLIN; 681 mFDs[mFDCount].revents = 0; 682 683 // Figure out the kinds of events the device reports. 684 685 uint8_t key_bitmask[sizeof_bit_array(KEY_MAX + 1)]; 686 memset(key_bitmask, 0, sizeof(key_bitmask)); 687 688 LOGV("Getting keys..."); 689 if (ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(key_bitmask)), key_bitmask) >= 0) { 690 //LOGI("MAP\n"); 691 //for (int i = 0; i < sizeof(key_bitmask); i++) { 692 // LOGI("%d: 0x%02x\n", i, key_bitmask[i]); 693 //} 694 695 // See if this is a keyboard. Ignore everything in the button range except for 696 // gamepads which are also considered keyboards. 697 if (containsNonZeroByte(key_bitmask, 0, sizeof_bit_array(BTN_MISC)) 698 || containsNonZeroByte(key_bitmask, sizeof_bit_array(BTN_GAMEPAD), 699 sizeof_bit_array(BTN_DIGI)) 700 || containsNonZeroByte(key_bitmask, sizeof_bit_array(KEY_OK), 701 sizeof_bit_array(KEY_MAX + 1))) { 702 device->classes |= INPUT_DEVICE_CLASS_KEYBOARD; 703 704 device->keyBitmask = new uint8_t[sizeof(key_bitmask)]; 705 if (device->keyBitmask != NULL) { 706 memcpy(device->keyBitmask, key_bitmask, sizeof(key_bitmask)); 707 } else { 708 delete device; 709 LOGE("out of memory allocating key bitmask"); 710 return -1; 711 } 712 } 713 } 714 715 // See if this is a trackball (or mouse). 716 if (test_bit(BTN_MOUSE, key_bitmask)) { 717 uint8_t rel_bitmask[sizeof_bit_array(REL_MAX + 1)]; 718 memset(rel_bitmask, 0, sizeof(rel_bitmask)); 719 LOGV("Getting relative controllers..."); 720 if (ioctl(fd, EVIOCGBIT(EV_REL, sizeof(rel_bitmask)), rel_bitmask) >= 0) { 721 if (test_bit(REL_X, rel_bitmask) && test_bit(REL_Y, rel_bitmask)) { 722 device->classes |= INPUT_DEVICE_CLASS_TRACKBALL; 723 } 724 } 725 } 726 727 // See if this is a touch pad. 728 uint8_t abs_bitmask[sizeof_bit_array(ABS_MAX + 1)]; 729 memset(abs_bitmask, 0, sizeof(abs_bitmask)); 730 LOGV("Getting absolute controllers..."); 731 if (ioctl(fd, EVIOCGBIT(EV_ABS, sizeof(abs_bitmask)), abs_bitmask) >= 0) { 732 // Is this a new modern multi-touch driver? 733 if (test_bit(ABS_MT_POSITION_X, abs_bitmask) 734 && test_bit(ABS_MT_POSITION_Y, abs_bitmask)) { 735 device->classes |= INPUT_DEVICE_CLASS_TOUCHSCREEN | INPUT_DEVICE_CLASS_TOUCHSCREEN_MT; 736 737 // Is this an old style single-touch driver? 738 } else if (test_bit(BTN_TOUCH, key_bitmask) 739 && test_bit(ABS_X, abs_bitmask) && test_bit(ABS_Y, abs_bitmask)) { 740 device->classes |= INPUT_DEVICE_CLASS_TOUCHSCREEN; 741 } 742 } 743 744#ifdef EV_SW 745 // figure out the switches this device reports 746 uint8_t sw_bitmask[sizeof_bit_array(SW_MAX + 1)]; 747 memset(sw_bitmask, 0, sizeof(sw_bitmask)); 748 bool hasSwitches = false; 749 if (ioctl(fd, EVIOCGBIT(EV_SW, sizeof(sw_bitmask)), sw_bitmask) >= 0) { 750 for (int i=0; i<EV_SW; i++) { 751 //LOGI("Device 0x%x sw %d: has=%d", device->id, i, test_bit(i, sw_bitmask)); 752 if (test_bit(i, sw_bitmask)) { 753 hasSwitches = true; 754 if (mSwitches[i] == 0) { 755 mSwitches[i] = device->id; 756 } 757 } 758 } 759 } 760 if (hasSwitches) { 761 device->classes |= INPUT_DEVICE_CLASS_SWITCH; 762 } 763#endif 764 765 if ((device->classes & INPUT_DEVICE_CLASS_KEYBOARD) != 0) { 766 char tmpfn[sizeof(name)]; 767 char keylayoutFilename[300]; 768 769 // a more descriptive name 770 device->name = name; 771 772 // replace all the spaces with underscores 773 strcpy(tmpfn, name); 774 for (char *p = strchr(tmpfn, ' '); p && *p; p = strchr(tmpfn, ' ')) 775 *p = '_'; 776 777 // find the .kl file we need for this device 778 const char* root = getenv("ANDROID_ROOT"); 779 snprintf(keylayoutFilename, sizeof(keylayoutFilename), 780 "%s/usr/keylayout/%s.kl", root, tmpfn); 781 bool defaultKeymap = false; 782 if (access(keylayoutFilename, R_OK)) { 783 snprintf(keylayoutFilename, sizeof(keylayoutFilename), 784 "%s/usr/keylayout/%s", root, "qwerty.kl"); 785 defaultKeymap = true; 786 } 787 status_t status = device->layoutMap->load(keylayoutFilename); 788 if (status) { 789 LOGE("Error %d loading key layout.", status); 790 } 791 792 // tell the world about the devname (the descriptive name) 793 if (!mHaveFirstKeyboard && !defaultKeymap && strstr(name, "-keypad")) { 794 // the built-in keyboard has a well-known device ID of 0, 795 // this device better not go away. 796 mHaveFirstKeyboard = true; 797 mFirstKeyboardId = device->id; 798 property_set("hw.keyboards.0.devname", name); 799 } else { 800 // ensure mFirstKeyboardId is set to -something-. 801 if (mFirstKeyboardId == 0) { 802 mFirstKeyboardId = device->id; 803 } 804 } 805 char propName[100]; 806 sprintf(propName, "hw.keyboards.%u.devname", device->id); 807 property_set(propName, name); 808 809 // 'Q' key support = cheap test of whether this is an alpha-capable kbd 810 if (hasKeycodeLocked(device, AKEYCODE_Q)) { 811 device->classes |= INPUT_DEVICE_CLASS_ALPHAKEY; 812 } 813 814 // See if this device has a DPAD. 815 if (hasKeycodeLocked(device, AKEYCODE_DPAD_UP) && 816 hasKeycodeLocked(device, AKEYCODE_DPAD_DOWN) && 817 hasKeycodeLocked(device, AKEYCODE_DPAD_LEFT) && 818 hasKeycodeLocked(device, AKEYCODE_DPAD_RIGHT) && 819 hasKeycodeLocked(device, AKEYCODE_DPAD_CENTER)) { 820 device->classes |= INPUT_DEVICE_CLASS_DPAD; 821 } 822 823 // See if this device has a gamepad. 824 for (size_t i = 0; i < sizeof(GAMEPAD_KEYCODES)/sizeof(GAMEPAD_KEYCODES[0]); i++) { 825 if (hasKeycodeLocked(device, GAMEPAD_KEYCODES[i])) { 826 device->classes |= INPUT_DEVICE_CLASS_GAMEPAD; 827 break; 828 } 829 } 830 831 LOGI("New keyboard: device->id=0x%x devname='%s' propName='%s' keylayout='%s'\n", 832 device->id, name, propName, keylayoutFilename); 833 } 834 835 // If the device isn't recognized as something we handle, don't monitor it. 836 if (device->classes == 0) { 837 LOGV("Dropping device %s %p, id = %d\n", deviceName, device, devid); 838 close(fd); 839 delete device; 840 return -1; 841 } 842 843 LOGI("New device: path=%s name=%s id=0x%x (of 0x%x) index=%d fd=%d classes=0x%x\n", 844 deviceName, name, device->id, mNumDevicesById, mFDCount, fd, device->classes); 845 846 LOGV("Adding device %s %p at %d, id = %d, classes = 0x%x\n", 847 deviceName, device, mFDCount, devid, device->classes); 848 849 mDevicesById[devid].device = device; 850 device->next = mOpeningDevices; 851 mOpeningDevices = device; 852 mDevices[mFDCount] = device; 853 854 mFDCount++; 855 return 0; 856} 857 858bool EventHub::hasKeycodeLocked(device_t* device, int keycode) const 859{ 860 if (device->keyBitmask == NULL || device->layoutMap == NULL) { 861 return false; 862 } 863 864 Vector<int32_t> scanCodes; 865 device->layoutMap->findScancodes(keycode, &scanCodes); 866 const size_t N = scanCodes.size(); 867 for (size_t i=0; i<N && i<=KEY_MAX; i++) { 868 int32_t sc = scanCodes.itemAt(i); 869 if (sc >= 0 && sc <= KEY_MAX && test_bit(sc, device->keyBitmask)) { 870 return true; 871 } 872 } 873 874 return false; 875} 876 877int EventHub::closeDevice(const char *deviceName) { 878 AutoMutex _l(mLock); 879 880 int i; 881 for(i = 1; i < mFDCount; i++) { 882 if(strcmp(mDevices[i]->path.string(), deviceName) == 0) { 883 //LOGD("remove device %d: %s\n", i, deviceName); 884 device_t* device = mDevices[i]; 885 886 LOGI("Removed device: path=%s name=%s id=0x%x (of 0x%x) index=%d fd=%d classes=0x%x\n", 887 device->path.string(), device->name.string(), device->id, 888 mNumDevicesById, mFDCount, mFDs[i].fd, device->classes); 889 890 // Clear this device's entry. 891 int index = (device->id&ID_MASK); 892 mDevicesById[index].device = NULL; 893 894 // Close the file descriptor and compact the fd array. 895 close(mFDs[i].fd); 896 int count = mFDCount - i - 1; 897 memmove(mDevices + i, mDevices + i + 1, sizeof(mDevices[0]) * count); 898 memmove(mFDs + i, mFDs + i + 1, sizeof(mFDs[0]) * count); 899 mFDCount--; 900 901#ifdef EV_SW 902 for (int j=0; j<EV_SW; j++) { 903 if (mSwitches[j] == device->id) { 904 mSwitches[j] = 0; 905 } 906 } 907#endif 908 909 device->next = mClosingDevices; 910 mClosingDevices = device; 911 912 if (device->id == mFirstKeyboardId) { 913 LOGW("built-in keyboard device %s (id=%d) is closing! the apps will not like this", 914 device->path.string(), mFirstKeyboardId); 915 mFirstKeyboardId = 0; 916 property_set("hw.keyboards.0.devname", NULL); 917 } 918 // clear the property 919 char propName[100]; 920 sprintf(propName, "hw.keyboards.%u.devname", device->id); 921 property_set(propName, NULL); 922 return 0; 923 } 924 } 925 LOGE("remove device: %s not found\n", deviceName); 926 return -1; 927} 928 929int EventHub::readNotify(int nfd) { 930#ifdef HAVE_INOTIFY 931 int res; 932 char devname[PATH_MAX]; 933 char *filename; 934 char event_buf[512]; 935 int event_size; 936 int event_pos = 0; 937 struct inotify_event *event; 938 939 LOGV("EventHub::readNotify nfd: %d\n", nfd); 940 res = read(nfd, event_buf, sizeof(event_buf)); 941 if(res < (int)sizeof(*event)) { 942 if(errno == EINTR) 943 return 0; 944 LOGW("could not get event, %s\n", strerror(errno)); 945 return 1; 946 } 947 //printf("got %d bytes of event information\n", res); 948 949 strcpy(devname, device_path); 950 filename = devname + strlen(devname); 951 *filename++ = '/'; 952 953 while(res >= (int)sizeof(*event)) { 954 event = (struct inotify_event *)(event_buf + event_pos); 955 //printf("%d: %08x \"%s\"\n", event->wd, event->mask, event->len ? event->name : ""); 956 if(event->len) { 957 strcpy(filename, event->name); 958 if(event->mask & IN_CREATE) { 959 openDevice(devname); 960 } 961 else { 962 closeDevice(devname); 963 } 964 } 965 event_size = sizeof(*event) + event->len; 966 res -= event_size; 967 event_pos += event_size; 968 } 969#endif 970 return 0; 971} 972 973 974int EventHub::scanDir(const char *dirname) 975{ 976 char devname[PATH_MAX]; 977 char *filename; 978 DIR *dir; 979 struct dirent *de; 980 dir = opendir(dirname); 981 if(dir == NULL) 982 return -1; 983 strcpy(devname, dirname); 984 filename = devname + strlen(devname); 985 *filename++ = '/'; 986 while((de = readdir(dir))) { 987 if(de->d_name[0] == '.' && 988 (de->d_name[1] == '\0' || 989 (de->d_name[1] == '.' && de->d_name[2] == '\0'))) 990 continue; 991 strcpy(filename, de->d_name); 992 openDevice(devname); 993 } 994 closedir(dir); 995 return 0; 996} 997 998void EventHub::dump(String8& dump) { 999 dump.append("Event Hub State:\n"); 1000 1001 { // acquire lock 1002 AutoMutex _l(mLock); 1003 1004 dump.appendFormat(INDENT "HaveFirstKeyboard: %s\n", toString(mHaveFirstKeyboard)); 1005 dump.appendFormat(INDENT "FirstKeyboardId: 0x%x\n", mFirstKeyboardId); 1006 1007 dump.append(INDENT "Devices:\n"); 1008 1009 for (int i = 0; i < mNumDevicesById; i++) { 1010 const device_t* device = mDevicesById[i].device; 1011 if (device) { 1012 if (mFirstKeyboardId == device->id) { 1013 dump.appendFormat(INDENT2 "0x%x: %s (aka device 0 - first keyboard)\n", 1014 device->id, device->name.string()); 1015 } else { 1016 dump.appendFormat(INDENT2 "0x%x: %s\n", device->id, device->name.string()); 1017 } 1018 dump.appendFormat(INDENT3 "Classes: 0x%08x\n", device->classes); 1019 dump.appendFormat(INDENT3 "Path: %s\n", device->path.string()); 1020 dump.appendFormat(INDENT3 "KeyLayoutFile: %s\n", device->keylayoutFilename.string()); 1021 } 1022 } 1023 } // release lock 1024} 1025 1026}; // namespace android 1027