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 <hardware_legacy/power.h> 20 21#include <cutils/properties.h> 22#include <utils/IServiceManager.h> 23#include <utils/Log.h> 24#include <utils/Timers.h> 25#include <utils.h> 26 27#include <stdlib.h> 28#include <stdio.h> 29#include <unistd.h> 30#include <fcntl.h> 31#include <memory.h> 32#include <errno.h> 33#include <assert.h> 34 35#include "KeyLayoutMap.h" 36 37#include <string.h> 38#include <stdint.h> 39#include <dirent.h> 40#ifdef HAVE_INOTIFY 41# include <sys/inotify.h> 42#endif 43#ifdef HAVE_ANDROID_OS 44# include <sys/limits.h> /* not part of Linux */ 45#endif 46#include <sys/poll.h> 47#include <sys/ioctl.h> 48 49/* this macro is used to tell if "bit" is set in "array" 50 * it selects a byte from the array, and does a boolean AND 51 * operation with a byte that only has the relevant bit set. 52 * eg. to check for the 12th bit, we do (array[1] & 1<<4) 53 */ 54#define test_bit(bit, array) (array[bit/8] & (1<<(bit%8))) 55 56#define ID_MASK 0x0000ffff 57#define SEQ_MASK 0x7fff0000 58#define SEQ_SHIFT 16 59#define id_to_index(id) ((id&ID_MASK)+1) 60 61namespace android { 62 63static const char *WAKE_LOCK_ID = "KeyEvents"; 64static const char *device_path = "/dev/input"; 65 66/* return the larger integer */ 67static inline int max(int v1, int v2) 68{ 69 return (v1 > v2) ? v1 : v2; 70} 71 72EventHub::device_t::device_t(int32_t _id, const char* _path) 73 : id(_id), path(_path), classes(0) 74 , keyBitmask(NULL), layoutMap(new KeyLayoutMap()), next(NULL) { 75} 76 77EventHub::device_t::~device_t() { 78 delete [] keyBitmask; 79 delete layoutMap; 80} 81 82EventHub::EventHub(void) 83 : mError(NO_INIT), mHaveFirstKeyboard(false), mFirstKeyboardId(0) 84 , mDevicesById(0), mNumDevicesById(0) 85 , mOpeningDevices(0), mClosingDevices(0) 86 , mDevices(0), mFDs(0), mFDCount(0) 87{ 88 acquire_wake_lock(PARTIAL_WAKE_LOCK, WAKE_LOCK_ID); 89#ifdef EV_SW 90 memset(mSwitches, 0, sizeof(mSwitches)); 91#endif 92} 93 94/* 95 * Clean up. 96 */ 97EventHub::~EventHub(void) 98{ 99 release_wake_lock(WAKE_LOCK_ID); 100 // we should free stuff here... 101} 102 103void EventHub::onFirstRef() 104{ 105 mError = openPlatformInput() ? NO_ERROR : UNKNOWN_ERROR; 106} 107 108status_t EventHub::errorCheck() const 109{ 110 return mError; 111} 112 113String8 EventHub::getDeviceName(int32_t deviceId) const 114{ 115 AutoMutex _l(mLock); 116 device_t* device = getDevice(deviceId); 117 if (device == NULL) return String8(); 118 return device->name; 119} 120 121uint32_t EventHub::getDeviceClasses(int32_t deviceId) const 122{ 123 AutoMutex _l(mLock); 124 device_t* device = getDevice(deviceId); 125 if (device == NULL) return 0; 126 return device->classes; 127} 128 129int EventHub::getAbsoluteInfo(int32_t deviceId, int axis, int *outMinValue, 130 int* outMaxValue, int* outFlat, int* outFuzz) const 131{ 132 AutoMutex _l(mLock); 133 device_t* device = getDevice(deviceId); 134 if (device == NULL) return -1; 135 136 struct input_absinfo info; 137 138 if(ioctl(mFDs[id_to_index(device->id)].fd, EVIOCGABS(axis), &info)) { 139 LOGE("Error reading absolute controller %d for device %s fd %d\n", 140 axis, device->name.string(), mFDs[id_to_index(device->id)].fd); 141 return -1; 142 } 143 *outMinValue = info.minimum; 144 *outMaxValue = info.maximum; 145 *outFlat = info.flat; 146 *outFuzz = info.fuzz; 147 return 0; 148} 149 150int EventHub::getSwitchState(int sw) const 151{ 152#ifdef EV_SW 153 if (sw >= 0 && sw <= SW_MAX) { 154 int32_t devid = mSwitches[sw]; 155 if (devid != 0) { 156 return getSwitchState(devid, sw); 157 } 158 } 159#endif 160 return -1; 161} 162 163int EventHub::getSwitchState(int32_t deviceId, int sw) const 164{ 165#ifdef EV_SW 166 AutoMutex _l(mLock); 167 device_t* device = getDevice(deviceId); 168 if (device == NULL) return -1; 169 170 if (sw >= 0 && sw <= SW_MAX) { 171 uint8_t sw_bitmask[(SW_MAX+1)/8]; 172 memset(sw_bitmask, 0, sizeof(sw_bitmask)); 173 if (ioctl(mFDs[id_to_index(device->id)].fd, 174 EVIOCGSW(sizeof(sw_bitmask)), sw_bitmask) >= 0) { 175 return test_bit(sw, sw_bitmask) ? 1 : 0; 176 } 177 } 178#endif 179 180 return -1; 181} 182 183int EventHub::getScancodeState(int code) const 184{ 185 return getScancodeState(mFirstKeyboardId, code); 186} 187 188int EventHub::getScancodeState(int32_t deviceId, int code) const 189{ 190 AutoMutex _l(mLock); 191 device_t* device = getDevice(deviceId); 192 if (device == NULL) return -1; 193 194 if (code >= 0 && code <= KEY_MAX) { 195 uint8_t key_bitmask[(KEY_MAX+1)/8]; 196 memset(key_bitmask, 0, sizeof(key_bitmask)); 197 if (ioctl(mFDs[id_to_index(device->id)].fd, 198 EVIOCGKEY(sizeof(key_bitmask)), key_bitmask) >= 0) { 199 return test_bit(code, key_bitmask) ? 1 : 0; 200 } 201 } 202 203 return -1; 204} 205 206int EventHub::getKeycodeState(int code) const 207{ 208 return getKeycodeState(mFirstKeyboardId, code); 209} 210 211int EventHub::getKeycodeState(int32_t deviceId, int code) const 212{ 213 AutoMutex _l(mLock); 214 device_t* device = getDevice(deviceId); 215 if (device == NULL || device->layoutMap == NULL) return -1; 216 217 Vector<int32_t> scanCodes; 218 device->layoutMap->findScancodes(code, &scanCodes); 219 220 uint8_t key_bitmask[(KEY_MAX+1)/8]; 221 memset(key_bitmask, 0, sizeof(key_bitmask)); 222 if (ioctl(mFDs[id_to_index(device->id)].fd, 223 EVIOCGKEY(sizeof(key_bitmask)), key_bitmask) >= 0) { 224 #if 0 225 for (size_t i=0; i<=KEY_MAX; i++) { 226 LOGI("(Scan code %d: down=%d)", i, test_bit(i, key_bitmask)); 227 } 228 #endif 229 const size_t N = scanCodes.size(); 230 for (size_t i=0; i<N && i<=KEY_MAX; i++) { 231 int32_t sc = scanCodes.itemAt(i); 232 //LOGI("Code %d: down=%d", sc, test_bit(sc, key_bitmask)); 233 if (sc >= 0 && sc <= KEY_MAX && test_bit(sc, key_bitmask)) { 234 return 1; 235 } 236 } 237 } 238 239 return 0; 240} 241 242EventHub::device_t* EventHub::getDevice(int32_t deviceId) const 243{ 244 if (deviceId == 0) deviceId = mFirstKeyboardId; 245 int32_t id = deviceId & ID_MASK; 246 if (id >= mNumDevicesById || id < 0) return NULL; 247 device_t* dev = mDevicesById[id].device; 248 if (dev == NULL) return NULL; 249 if (dev->id == deviceId) { 250 return dev; 251 } 252 return NULL; 253} 254 255bool EventHub::getEvent(int32_t* outDeviceId, int32_t* outType, 256 int32_t* outScancode, int32_t* outKeycode, uint32_t *outFlags, 257 int32_t* outValue, nsecs_t* outWhen) 258{ 259 *outDeviceId = 0; 260 *outType = 0; 261 *outScancode = 0; 262 *outKeycode = 0; 263 *outFlags = 0; 264 *outValue = 0; 265 *outWhen = 0; 266 267 status_t err; 268 269 fd_set readfds; 270 int maxFd = -1; 271 int cc; 272 int i; 273 int res; 274 int pollres; 275 struct input_event iev; 276 277 // Note that we only allow one caller to getEvent(), so don't need 278 // to do locking here... only when adding/removing devices. 279 280 while(1) { 281 282 // First, report any devices that had last been added/removed. 283 if (mClosingDevices != NULL) { 284 device_t* device = mClosingDevices; 285 LOGV("Reporting device closed: id=0x%x, name=%s\n", 286 device->id, device->path.string()); 287 mClosingDevices = device->next; 288 *outDeviceId = device->id; 289 if (*outDeviceId == mFirstKeyboardId) *outDeviceId = 0; 290 *outType = DEVICE_REMOVED; 291 delete device; 292 return true; 293 } 294 if (mOpeningDevices != NULL) { 295 device_t* device = mOpeningDevices; 296 LOGV("Reporting device opened: id=0x%x, name=%s\n", 297 device->id, device->path.string()); 298 mOpeningDevices = device->next; 299 *outDeviceId = device->id; 300 if (*outDeviceId == mFirstKeyboardId) *outDeviceId = 0; 301 *outType = DEVICE_ADDED; 302 return true; 303 } 304 305 release_wake_lock(WAKE_LOCK_ID); 306 307 pollres = poll(mFDs, mFDCount, -1); 308 309 acquire_wake_lock(PARTIAL_WAKE_LOCK, WAKE_LOCK_ID); 310 311 if (pollres <= 0) { 312 if (errno != EINTR) { 313 LOGW("select failed (errno=%d)\n", errno); 314 usleep(100000); 315 } 316 continue; 317 } 318 319 //printf("poll %d, returned %d\n", mFDCount, pollres); 320 321 // mFDs[0] is used for inotify, so process regular events starting at mFDs[1] 322 for(i = 1; i < mFDCount; i++) { 323 if(mFDs[i].revents) { 324 LOGV("revents for %d = 0x%08x", i, mFDs[i].revents); 325 if(mFDs[i].revents & POLLIN) { 326 res = read(mFDs[i].fd, &iev, sizeof(iev)); 327 if (res == sizeof(iev)) { 328 LOGV("%s got: t0=%d, t1=%d, type=%d, code=%d, v=%d", 329 mDevices[i]->path.string(), 330 (int) iev.time.tv_sec, (int) iev.time.tv_usec, 331 iev.type, iev.code, iev.value); 332 *outDeviceId = mDevices[i]->id; 333 if (*outDeviceId == mFirstKeyboardId) *outDeviceId = 0; 334 *outType = iev.type; 335 *outScancode = iev.code; 336 if (iev.type == EV_KEY) { 337 err = mDevices[i]->layoutMap->map(iev.code, outKeycode, outFlags); 338 LOGV("iev.code=%d outKeycode=%d outFlags=0x%08x err=%d\n", 339 iev.code, *outKeycode, *outFlags, err); 340 if (err != 0) { 341 *outKeycode = 0; 342 *outFlags = 0; 343 } 344 } else { 345 *outKeycode = iev.code; 346 } 347 *outValue = iev.value; 348 *outWhen = s2ns(iev.time.tv_sec) + us2ns(iev.time.tv_usec); 349 return true; 350 } else { 351 if (res<0) { 352 LOGW("could not get event (errno=%d)", errno); 353 } else { 354 LOGE("could not get event (wrong size: %d)", res); 355 } 356 continue; 357 } 358 } 359 } 360 } 361 362 // read_notify() will modify mFDs and mFDCount, so this must be done after 363 // processing all other events. 364 if(mFDs[0].revents & POLLIN) { 365 read_notify(mFDs[0].fd); 366 } 367 } 368} 369 370/* 371 * Open the platform-specific input device. 372 */ 373bool EventHub::openPlatformInput(void) 374{ 375 /* 376 * Open platform-specific input device(s). 377 */ 378 int res; 379 380 mFDCount = 1; 381 mFDs = (pollfd *)calloc(1, sizeof(mFDs[0])); 382 mDevices = (device_t **)calloc(1, sizeof(mDevices[0])); 383 mFDs[0].events = POLLIN; 384 mDevices[0] = NULL; 385#ifdef HAVE_INOTIFY 386 mFDs[0].fd = inotify_init(); 387 res = inotify_add_watch(mFDs[0].fd, device_path, IN_DELETE | IN_CREATE); 388 if(res < 0) { 389 LOGE("could not add watch for %s, %s\n", device_path, strerror(errno)); 390 } 391#else 392 /* 393 * The code in EventHub::getEvent assumes that mFDs[0] is an inotify fd. 394 * We allocate space for it and set it to something invalid. 395 */ 396 mFDs[0].fd = -1; 397#endif 398 399 res = scan_dir(device_path); 400 if(res < 0) { 401 LOGE("scan dir failed for %s\n", device_path); 402 //open_device("/dev/input/event0"); 403 } 404 405 return true; 406} 407 408/* 409 * Inspect the known devices to determine whether physical keys exist for the given 410 * framework-domain key codes. 411 */ 412bool EventHub::hasKeys(size_t numCodes, int32_t* keyCodes, uint8_t* outFlags) { 413 for (size_t codeIndex = 0; codeIndex < numCodes; codeIndex++) { 414 outFlags[codeIndex] = 0; 415 416 // check each available hardware device for support for this keycode 417 Vector<int32_t> scanCodes; 418 for (int n = 0; (n < mFDCount) && (outFlags[codeIndex] == 0); n++) { 419 if (mDevices[n]) { 420 status_t err = mDevices[n]->layoutMap->findScancodes(keyCodes[codeIndex], &scanCodes); 421 if (!err) { 422 // check the possible scan codes identified by the layout map against the 423 // map of codes actually emitted by the driver 424 for (size_t sc = 0; sc < scanCodes.size(); sc++) { 425 if (test_bit(scanCodes[sc], mDevices[n]->keyBitmask)) { 426 outFlags[codeIndex] = 1; 427 break; 428 } 429 } 430 } 431 } 432 } 433 } 434 435 return true; 436} 437 438// ---------------------------------------------------------------------------- 439 440int EventHub::open_device(const char *deviceName) 441{ 442 int version; 443 int fd; 444 struct pollfd *new_mFDs; 445 device_t **new_devices; 446 char **new_device_names; 447 char name[80]; 448 char location[80]; 449 char idstr[80]; 450 struct input_id id; 451 452 LOGV("Opening device: %s", deviceName); 453 454 AutoMutex _l(mLock); 455 456 fd = open(deviceName, O_RDWR); 457 if(fd < 0) { 458 LOGE("could not open %s, %s\n", deviceName, strerror(errno)); 459 return -1; 460 } 461 462 if(ioctl(fd, EVIOCGVERSION, &version)) { 463 LOGE("could not get driver version for %s, %s\n", deviceName, strerror(errno)); 464 return -1; 465 } 466 if(ioctl(fd, EVIOCGID, &id)) { 467 LOGE("could not get driver id for %s, %s\n", deviceName, strerror(errno)); 468 return -1; 469 } 470 name[sizeof(name) - 1] = '\0'; 471 location[sizeof(location) - 1] = '\0'; 472 idstr[sizeof(idstr) - 1] = '\0'; 473 if(ioctl(fd, EVIOCGNAME(sizeof(name) - 1), &name) < 1) { 474 //fprintf(stderr, "could not get device name for %s, %s\n", deviceName, strerror(errno)); 475 name[0] = '\0'; 476 } 477 if(ioctl(fd, EVIOCGPHYS(sizeof(location) - 1), &location) < 1) { 478 //fprintf(stderr, "could not get location for %s, %s\n", deviceName, strerror(errno)); 479 location[0] = '\0'; 480 } 481 if(ioctl(fd, EVIOCGUNIQ(sizeof(idstr) - 1), &idstr) < 1) { 482 //fprintf(stderr, "could not get idstring for %s, %s\n", deviceName, strerror(errno)); 483 idstr[0] = '\0'; 484 } 485 486 int devid = 0; 487 while (devid < mNumDevicesById) { 488 if (mDevicesById[devid].device == NULL) { 489 break; 490 } 491 devid++; 492 } 493 if (devid >= mNumDevicesById) { 494 device_ent* new_devids = (device_ent*)realloc(mDevicesById, 495 sizeof(mDevicesById[0]) * (devid + 1)); 496 if (new_devids == NULL) { 497 LOGE("out of memory"); 498 return -1; 499 } 500 mDevicesById = new_devids; 501 mNumDevicesById = devid+1; 502 mDevicesById[devid].device = NULL; 503 mDevicesById[devid].seq = 0; 504 } 505 506 mDevicesById[devid].seq = (mDevicesById[devid].seq+(1<<SEQ_SHIFT))&SEQ_MASK; 507 if (mDevicesById[devid].seq == 0) { 508 mDevicesById[devid].seq = 1<<SEQ_SHIFT; 509 } 510 511 new_mFDs = (pollfd*)realloc(mFDs, sizeof(mFDs[0]) * (mFDCount + 1)); 512 new_devices = (device_t**)realloc(mDevices, sizeof(mDevices[0]) * (mFDCount + 1)); 513 if (new_mFDs == NULL || new_devices == NULL) { 514 LOGE("out of memory"); 515 return -1; 516 } 517 mFDs = new_mFDs; 518 mDevices = new_devices; 519 520#if 0 521 LOGI("add device %d: %s\n", mFDCount, deviceName); 522 LOGI(" bus: %04x\n" 523 " vendor %04x\n" 524 " product %04x\n" 525 " version %04x\n", 526 id.bustype, id.vendor, id.product, id.version); 527 LOGI(" name: \"%s\"\n", name); 528 LOGI(" location: \"%s\"\n" 529 " id: \"%s\"\n", location, idstr); 530 LOGI(" version: %d.%d.%d\n", 531 version >> 16, (version >> 8) & 0xff, version & 0xff); 532#endif 533 534 device_t* device = new device_t(devid|mDevicesById[devid].seq, deviceName); 535 if (device == NULL) { 536 LOGE("out of memory"); 537 return -1; 538 } 539 540 mFDs[mFDCount].fd = fd; 541 mFDs[mFDCount].events = POLLIN; 542 543 // figure out the kinds of events the device reports 544 uint8_t key_bitmask[(KEY_MAX+1)/8]; 545 memset(key_bitmask, 0, sizeof(key_bitmask)); 546 LOGV("Getting keys..."); 547 if (ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(key_bitmask)), key_bitmask) >= 0) { 548 //LOGI("MAP\n"); 549 //for (int i=0; i<((KEY_MAX+1)/8); i++) { 550 // LOGI("%d: 0x%02x\n", i, key_bitmask[i]); 551 //} 552 for (int i=0; i<((BTN_MISC+7)/8); i++) { 553 if (key_bitmask[i] != 0) { 554 device->classes |= CLASS_KEYBOARD; 555 // 'Q' key support = cheap test of whether this is an alpha-capable kbd 556 if (test_bit(KEY_Q, key_bitmask)) { 557 device->classes |= CLASS_ALPHAKEY; 558 } 559 break; 560 } 561 } 562 if ((device->classes & CLASS_KEYBOARD) != 0) { 563 device->keyBitmask = new uint8_t[(KEY_MAX+1)/8]; 564 if (device->keyBitmask != NULL) { 565 memcpy(device->keyBitmask, key_bitmask, sizeof(key_bitmask)); 566 } else { 567 delete device; 568 LOGE("out of memory allocating key bitmask"); 569 return -1; 570 } 571 } 572 } 573 if (test_bit(BTN_MOUSE, key_bitmask)) { 574 uint8_t rel_bitmask[(REL_MAX+1)/8]; 575 memset(rel_bitmask, 0, sizeof(rel_bitmask)); 576 LOGV("Getting relative controllers..."); 577 if (ioctl(fd, EVIOCGBIT(EV_REL, sizeof(rel_bitmask)), rel_bitmask) >= 0) 578 { 579 if (test_bit(REL_X, rel_bitmask) && test_bit(REL_Y, rel_bitmask)) { 580 device->classes |= CLASS_TRACKBALL; 581 } 582 } 583 } 584 if (test_bit(BTN_TOUCH, key_bitmask)) { 585 uint8_t abs_bitmask[(ABS_MAX+1)/8]; 586 memset(abs_bitmask, 0, sizeof(abs_bitmask)); 587 LOGV("Getting absolute controllers..."); 588 if (ioctl(fd, EVIOCGBIT(EV_ABS, sizeof(abs_bitmask)), abs_bitmask) >= 0) 589 { 590 if (test_bit(ABS_X, abs_bitmask) && test_bit(ABS_Y, abs_bitmask)) { 591 device->classes |= CLASS_TOUCHSCREEN; 592 } 593 } 594 } 595 596#ifdef EV_SW 597 // figure out the switches this device reports 598 uint8_t sw_bitmask[(SW_MAX+1)/8]; 599 memset(sw_bitmask, 0, sizeof(sw_bitmask)); 600 if (ioctl(fd, EVIOCGBIT(EV_SW, sizeof(sw_bitmask)), sw_bitmask) >= 0) { 601 for (int i=0; i<EV_SW; i++) { 602 //LOGI("Device 0x%x sw %d: has=%d", device->id, i, test_bit(i, sw_bitmask)); 603 if (test_bit(i, sw_bitmask)) { 604 if (mSwitches[i] == 0) { 605 mSwitches[i] = device->id; 606 } 607 } 608 } 609 } 610#endif 611 612 LOGI("New device: path=%s name=%s id=0x%x (of 0x%x) index=%d fd=%d classes=0x%x\n", 613 deviceName, name, device->id, mNumDevicesById, mFDCount, fd, device->classes); 614 615 if ((device->classes&CLASS_KEYBOARD) != 0) { 616 char devname[101]; 617 char tmpfn[101]; 618 char keylayoutFilename[300]; 619 620 // a more descriptive name 621 ioctl(mFDs[mFDCount].fd, EVIOCGNAME(sizeof(devname)-1), devname); 622 devname[sizeof(devname)-1] = 0; 623 device->name = devname; 624 625 // replace all the spaces with underscores 626 strcpy(tmpfn, devname); 627 for (char *p = strchr(tmpfn, ' '); p && *p; p = strchr(tmpfn, ' ')) 628 *p = '_'; 629 630 // find the .kl file we need for this device 631 const char* root = getenv("ANDROID_ROOT"); 632 snprintf(keylayoutFilename, sizeof(keylayoutFilename), 633 "%s/usr/keylayout/%s.kl", root, tmpfn); 634 bool defaultKeymap = false; 635 if (access(keylayoutFilename, R_OK)) { 636 snprintf(keylayoutFilename, sizeof(keylayoutFilename), 637 "%s/usr/keylayout/%s", root, "qwerty.kl"); 638 defaultKeymap = true; 639 } 640 device->layoutMap->load(keylayoutFilename); 641 642 // tell the world about the devname (the descriptive name) 643 int32_t publicID; 644 if (!mHaveFirstKeyboard && !defaultKeymap) { 645 publicID = 0; 646 // the built-in keyboard has a well-known device ID of 0, 647 // this device better not go away. 648 mHaveFirstKeyboard = true; 649 mFirstKeyboardId = device->id; 650 } else { 651 publicID = device->id; 652 // ensure mFirstKeyboardId is set to -something-. 653 if (mFirstKeyboardId == 0) { 654 mFirstKeyboardId = device->id; 655 } 656 } 657 char propName[100]; 658 sprintf(propName, "hw.keyboards.%u.devname", publicID); 659 property_set(propName, devname); 660 661 LOGI("New keyboard: publicID=%d device->id=%d devname='%s' propName='%s' keylayout='%s'\n", 662 publicID, device->id, devname, propName, keylayoutFilename); 663 } 664 665 LOGV("Adding device %s %p at %d, id = %d, classes = 0x%x\n", 666 deviceName, device, mFDCount, devid, device->classes); 667 668 mDevicesById[devid].device = device; 669 device->next = mOpeningDevices; 670 mOpeningDevices = device; 671 mDevices[mFDCount] = device; 672 673 mFDCount++; 674 return 0; 675} 676 677int EventHub::close_device(const char *deviceName) 678{ 679 AutoMutex _l(mLock); 680 681 int i; 682 for(i = 1; i < mFDCount; i++) { 683 if(strcmp(mDevices[i]->path.string(), deviceName) == 0) { 684 //LOGD("remove device %d: %s\n", i, deviceName); 685 device_t* device = mDevices[i]; 686 int count = mFDCount - i - 1; 687 int index = (device->id&ID_MASK); 688 mDevicesById[index].device = NULL; 689 memmove(mDevices + i, mDevices + i + 1, sizeof(mDevices[0]) * count); 690 memmove(mFDs + i, mFDs + i + 1, sizeof(mFDs[0]) * count); 691 692#ifdef EV_SW 693 for (int j=0; j<EV_SW; j++) { 694 if (mSwitches[j] == device->id) { 695 mSwitches[j] = 0; 696 } 697 } 698#endif 699 700 device->next = mClosingDevices; 701 mClosingDevices = device; 702 703 mFDCount--; 704 705 uint32_t publicID; 706 if (device->id == mFirstKeyboardId) { 707 LOGW("built-in keyboard device %s (id=%d) is closing! the apps will not like this", 708 device->path.string(), mFirstKeyboardId); 709 mFirstKeyboardId = 0; 710 publicID = 0; 711 } else { 712 publicID = device->id; 713 } 714 // clear the property 715 char propName[100]; 716 sprintf(propName, "hw.keyboards.%u.devname", publicID); 717 property_set(propName, NULL); 718 return 0; 719 } 720 } 721 LOGE("remote device: %s not found\n", deviceName); 722 return -1; 723} 724 725int EventHub::read_notify(int nfd) 726{ 727#ifdef HAVE_INOTIFY 728 int res; 729 char devname[PATH_MAX]; 730 char *filename; 731 char event_buf[512]; 732 int event_size; 733 int event_pos = 0; 734 struct inotify_event *event; 735 736 res = read(nfd, event_buf, sizeof(event_buf)); 737 if(res < (int)sizeof(*event)) { 738 if(errno == EINTR) 739 return 0; 740 LOGW("could not get event, %s\n", strerror(errno)); 741 return 1; 742 } 743 //printf("got %d bytes of event information\n", res); 744 745 strcpy(devname, device_path); 746 filename = devname + strlen(devname); 747 *filename++ = '/'; 748 749 while(res >= (int)sizeof(*event)) { 750 event = (struct inotify_event *)(event_buf + event_pos); 751 //printf("%d: %08x \"%s\"\n", event->wd, event->mask, event->len ? event->name : ""); 752 if(event->len) { 753 strcpy(filename, event->name); 754 if(event->mask & IN_CREATE) { 755 open_device(devname); 756 } 757 else { 758 close_device(devname); 759 } 760 } 761 event_size = sizeof(*event) + event->len; 762 res -= event_size; 763 event_pos += event_size; 764 } 765#endif 766 return 0; 767} 768 769 770int EventHub::scan_dir(const char *dirname) 771{ 772 char devname[PATH_MAX]; 773 char *filename; 774 DIR *dir; 775 struct dirent *de; 776 dir = opendir(dirname); 777 if(dir == NULL) 778 return -1; 779 strcpy(devname, dirname); 780 filename = devname + strlen(devname); 781 *filename++ = '/'; 782 while((de = readdir(dir))) { 783 if(de->d_name[0] == '.' && 784 (de->d_name[1] == '\0' || 785 (de->d_name[1] == '.' && de->d_name[2] == '\0'))) 786 continue; 787 strcpy(filename, de->d_name); 788 open_device(devname); 789 } 790 closedir(dir); 791 return 0; 792} 793 794}; // namespace android 795