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Diffstat (limited to 'services/input/EventHub.cpp')
| -rw-r--r-- | services/input/EventHub.cpp | 1095 |
1 files changed, 1095 insertions, 0 deletions
diff --git a/services/input/EventHub.cpp b/services/input/EventHub.cpp new file mode 100644 index 0000000..487e73f --- /dev/null +++ b/services/input/EventHub.cpp @@ -0,0 +1,1095 @@ +/* + * Copyright (C) 2005 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +// +// Handle events, like key input and vsync. +// +// The goal is to provide an optimized solution for Linux, not an +// implementation that works well across all platforms. We expect +// events to arrive on file descriptors, so that we can use a select() +// select() call to sleep. +// +// We can't select() on anything but network sockets in Windows, so we +// provide an alternative implementation of waitEvent for that platform. +// +#define LOG_TAG "EventHub" + +//#define LOG_NDEBUG 0 + +#include "EventHub.h" + +#include <hardware_legacy/power.h> + +#include <cutils/properties.h> +#include <utils/Log.h> +#include <utils/Timers.h> +#include <utils/threads.h> +#include <utils/Errors.h> + +#include <stdlib.h> +#include <stdio.h> +#include <unistd.h> +#include <fcntl.h> +#include <memory.h> +#include <errno.h> +#include <assert.h> + +#include <ui/KeyLayoutMap.h> +#include <ui/KeyCharacterMap.h> +#include <ui/VirtualKeyMap.h> + +#include <string.h> +#include <stdint.h> +#include <dirent.h> +#ifdef HAVE_INOTIFY +# include <sys/inotify.h> +#endif +#ifdef HAVE_ANDROID_OS +# include <sys/limits.h> /* not part of Linux */ +#endif +#include <sys/poll.h> +#include <sys/ioctl.h> + +/* this macro is used to tell if "bit" is set in "array" + * it selects a byte from the array, and does a boolean AND + * operation with a byte that only has the relevant bit set. + * eg. to check for the 12th bit, we do (array[1] & 1<<4) + */ +#define test_bit(bit, array) (array[bit/8] & (1<<(bit%8))) + +/* this macro computes the number of bytes needed to represent a bit array of the specified size */ +#define sizeof_bit_array(bits) ((bits + 7) / 8) + +// Fd at index 0 is always reserved for inotify +#define FIRST_ACTUAL_DEVICE_INDEX 1 + +#define INDENT " " +#define INDENT2 " " +#define INDENT3 " " + +namespace android { + +static const char *WAKE_LOCK_ID = "KeyEvents"; +static const char *DEVICE_PATH = "/dev/input"; + +/* return the larger integer */ +static inline int max(int v1, int v2) +{ + return (v1 > v2) ? v1 : v2; +} + +static inline const char* toString(bool value) { + return value ? "true" : "false"; +} + +// --- EventHub::Device --- + +EventHub::Device::Device(int fd, int32_t id, const String8& path, + const InputDeviceIdentifier& identifier) : + next(NULL), + fd(fd), id(id), path(path), identifier(identifier), + classes(0), keyBitmask(NULL), configuration(NULL), virtualKeyMap(NULL) { +} + +EventHub::Device::~Device() { + close(); + delete[] keyBitmask; + delete configuration; + delete virtualKeyMap; +} + +void EventHub::Device::close() { + if (fd >= 0) { + ::close(fd); + fd = -1; + } +} + + +// --- EventHub --- + +EventHub::EventHub(void) : + mError(NO_INIT), mBuiltInKeyboardId(-1), mNextDeviceId(1), + mOpeningDevices(0), mClosingDevices(0), + mOpened(false), mNeedToSendFinishedDeviceScan(false), + mInputBufferIndex(0), mInputBufferCount(0), mInputFdIndex(0) { + acquire_wake_lock(PARTIAL_WAKE_LOCK, WAKE_LOCK_ID); +#ifdef EV_SW + memset(mSwitches, 0, sizeof(mSwitches)); +#endif +} + +EventHub::~EventHub(void) { + release_wake_lock(WAKE_LOCK_ID); + // we should free stuff here... +} + +status_t EventHub::errorCheck() const { + return mError; +} + +String8 EventHub::getDeviceName(int32_t deviceId) const { + AutoMutex _l(mLock); + Device* device = getDeviceLocked(deviceId); + if (device == NULL) return String8(); + return device->identifier.name; +} + +uint32_t EventHub::getDeviceClasses(int32_t deviceId) const { + AutoMutex _l(mLock); + Device* device = getDeviceLocked(deviceId); + if (device == NULL) return 0; + return device->classes; +} + +void EventHub::getConfiguration(int32_t deviceId, PropertyMap* outConfiguration) const { + AutoMutex _l(mLock); + Device* device = getDeviceLocked(deviceId); + if (device && device->configuration) { + *outConfiguration = *device->configuration; + } else { + outConfiguration->clear(); + } +} + +status_t EventHub::getAbsoluteAxisInfo(int32_t deviceId, int axis, + RawAbsoluteAxisInfo* outAxisInfo) const { + outAxisInfo->clear(); + + AutoMutex _l(mLock); + Device* device = getDeviceLocked(deviceId); + if (device == NULL) return -1; + + struct input_absinfo info; + + if(ioctl(device->fd, EVIOCGABS(axis), &info)) { + LOGW("Error reading absolute controller %d for device %s fd %d\n", + axis, device->identifier.name.string(), device->fd); + return -errno; + } + + if (info.minimum != info.maximum) { + outAxisInfo->valid = true; + outAxisInfo->minValue = info.minimum; + outAxisInfo->maxValue = info.maximum; + outAxisInfo->flat = info.flat; + outAxisInfo->fuzz = info.fuzz; + } + return OK; +} + +int32_t EventHub::getScanCodeState(int32_t deviceId, int32_t scanCode) const { + if (scanCode >= 0 && scanCode <= KEY_MAX) { + AutoMutex _l(mLock); + + Device* device = getDeviceLocked(deviceId); + if (device != NULL) { + return getScanCodeStateLocked(device, scanCode); + } + } + return AKEY_STATE_UNKNOWN; +} + +int32_t EventHub::getScanCodeStateLocked(Device* device, int32_t scanCode) const { + uint8_t key_bitmask[sizeof_bit_array(KEY_MAX + 1)]; + memset(key_bitmask, 0, sizeof(key_bitmask)); + if (ioctl(device->fd, + EVIOCGKEY(sizeof(key_bitmask)), key_bitmask) >= 0) { + return test_bit(scanCode, key_bitmask) ? AKEY_STATE_DOWN : AKEY_STATE_UP; + } + return AKEY_STATE_UNKNOWN; +} + +int32_t EventHub::getKeyCodeState(int32_t deviceId, int32_t keyCode) const { + AutoMutex _l(mLock); + + Device* device = getDeviceLocked(deviceId); + if (device != NULL) { + return getKeyCodeStateLocked(device, keyCode); + } + return AKEY_STATE_UNKNOWN; +} + +int32_t EventHub::getKeyCodeStateLocked(Device* device, int32_t keyCode) const { + if (!device->keyMap.haveKeyLayout()) { + return AKEY_STATE_UNKNOWN; + } + + Vector<int32_t> scanCodes; + device->keyMap.keyLayoutMap->findScanCodes(keyCode, &scanCodes); + + uint8_t key_bitmask[sizeof_bit_array(KEY_MAX + 1)]; + memset(key_bitmask, 0, sizeof(key_bitmask)); + if (ioctl(device->fd, EVIOCGKEY(sizeof(key_bitmask)), key_bitmask) >= 0) { + #if 0 + for (size_t i=0; i<=KEY_MAX; i++) { + LOGI("(Scan code %d: down=%d)", i, test_bit(i, key_bitmask)); + } + #endif + const size_t N = scanCodes.size(); + for (size_t i=0; i<N && i<=KEY_MAX; i++) { + int32_t sc = scanCodes.itemAt(i); + //LOGI("Code %d: down=%d", sc, test_bit(sc, key_bitmask)); + if (sc >= 0 && sc <= KEY_MAX && test_bit(sc, key_bitmask)) { + return AKEY_STATE_DOWN; + } + } + return AKEY_STATE_UP; + } + return AKEY_STATE_UNKNOWN; +} + +int32_t EventHub::getSwitchState(int32_t deviceId, int32_t sw) const { +#ifdef EV_SW + if (sw >= 0 && sw <= SW_MAX) { + AutoMutex _l(mLock); + + Device* device = getDeviceLocked(deviceId); + if (device != NULL) { + return getSwitchStateLocked(device, sw); + } + } +#endif + return AKEY_STATE_UNKNOWN; +} + +int32_t EventHub::getSwitchStateLocked(Device* device, int32_t sw) const { + uint8_t sw_bitmask[sizeof_bit_array(SW_MAX + 1)]; + memset(sw_bitmask, 0, sizeof(sw_bitmask)); + if (ioctl(device->fd, + EVIOCGSW(sizeof(sw_bitmask)), sw_bitmask) >= 0) { + return test_bit(sw, sw_bitmask) ? AKEY_STATE_DOWN : AKEY_STATE_UP; + } + return AKEY_STATE_UNKNOWN; +} + +bool EventHub::markSupportedKeyCodes(int32_t deviceId, size_t numCodes, + const int32_t* keyCodes, uint8_t* outFlags) const { + AutoMutex _l(mLock); + + Device* device = getDeviceLocked(deviceId); + if (device != NULL) { + return markSupportedKeyCodesLocked(device, numCodes, keyCodes, outFlags); + } + return false; +} + +bool EventHub::markSupportedKeyCodesLocked(Device* device, size_t numCodes, + const int32_t* keyCodes, uint8_t* outFlags) const { + if (!device->keyMap.haveKeyLayout() || !device->keyBitmask) { + return false; + } + + Vector<int32_t> scanCodes; + for (size_t codeIndex = 0; codeIndex < numCodes; codeIndex++) { + scanCodes.clear(); + + status_t err = device->keyMap.keyLayoutMap->findScanCodes(keyCodes[codeIndex], &scanCodes); + if (! err) { + // check the possible scan codes identified by the layout map against the + // map of codes actually emitted by the driver + for (size_t sc = 0; sc < scanCodes.size(); sc++) { + if (test_bit(scanCodes[sc], device->keyBitmask)) { + outFlags[codeIndex] = 1; + break; + } + } + } + } + return true; +} + +status_t EventHub::scancodeToKeycode(int32_t deviceId, int scancode, + int32_t* outKeycode, uint32_t* outFlags) const +{ + AutoMutex _l(mLock); + Device* device = getDeviceLocked(deviceId); + + if (device && device->keyMap.haveKeyLayout()) { + status_t err = device->keyMap.keyLayoutMap->map(scancode, outKeycode, outFlags); + if (err == NO_ERROR) { + return NO_ERROR; + } + } + + if (mBuiltInKeyboardId != -1) { + device = getDeviceLocked(mBuiltInKeyboardId); + + if (device && device->keyMap.haveKeyLayout()) { + status_t err = device->keyMap.keyLayoutMap->map(scancode, outKeycode, outFlags); + if (err == NO_ERROR) { + return NO_ERROR; + } + } + } + + *outKeycode = 0; + *outFlags = 0; + return NAME_NOT_FOUND; +} + +void EventHub::addExcludedDevice(const char* deviceName) +{ + AutoMutex _l(mLock); + + String8 name(deviceName); + mExcludedDevices.push_back(name); +} + +bool EventHub::hasLed(int32_t deviceId, int32_t led) const { + AutoMutex _l(mLock); + Device* device = getDeviceLocked(deviceId); + if (device) { + uint8_t bitmask[sizeof_bit_array(LED_MAX + 1)]; + memset(bitmask, 0, sizeof(bitmask)); + if (ioctl(device->fd, EVIOCGBIT(EV_LED, sizeof(bitmask)), bitmask) >= 0) { + if (test_bit(led, bitmask)) { + return true; + } + } + } + return false; +} + +void EventHub::setLedState(int32_t deviceId, int32_t led, bool on) { + AutoMutex _l(mLock); + Device* device = getDeviceLocked(deviceId); + if (device) { + struct input_event ev; + ev.time.tv_sec = 0; + ev.time.tv_usec = 0; + ev.type = EV_LED; + ev.code = led; + ev.value = on ? 1 : 0; + + ssize_t nWrite; + do { + nWrite = write(device->fd, &ev, sizeof(struct input_event)); + } while (nWrite == -1 && errno == EINTR); + } +} + +void EventHub::getVirtualKeyDefinitions(int32_t deviceId, + Vector<VirtualKeyDefinition>& outVirtualKeys) const { + outVirtualKeys.clear(); + + AutoMutex _l(mLock); + Device* device = getDeviceLocked(deviceId); + if (device && device->virtualKeyMap) { + outVirtualKeys.appendVector(device->virtualKeyMap->getVirtualKeys()); + } +} + +EventHub::Device* EventHub::getDeviceLocked(int32_t deviceId) const { + if (deviceId == 0) { + deviceId = mBuiltInKeyboardId; + } + + size_t numDevices = mDevices.size(); + for (size_t i = FIRST_ACTUAL_DEVICE_INDEX; i < numDevices; i++) { + Device* device = mDevices[i]; + if (device->id == deviceId) { + return device; + } + } + return NULL; +} + +bool EventHub::getEvent(RawEvent* outEvent) { + outEvent->deviceId = 0; + outEvent->type = 0; + outEvent->scanCode = 0; + outEvent->keyCode = 0; + outEvent->flags = 0; + outEvent->value = 0; + outEvent->when = 0; + + // Note that we only allow one caller to getEvent(), so don't need + // to do locking here... only when adding/removing devices. + + if (!mOpened) { + mError = openPlatformInput() ? NO_ERROR : UNKNOWN_ERROR; + mOpened = true; + mNeedToSendFinishedDeviceScan = true; + } + + for (;;) { + // Report any devices that had last been added/removed. + if (mClosingDevices != NULL) { + Device* device = mClosingDevices; + LOGV("Reporting device closed: id=%d, name=%s\n", + device->id, device->path.string()); + mClosingDevices = device->next; + if (device->id == mBuiltInKeyboardId) { + outEvent->deviceId = 0; + } else { + outEvent->deviceId = device->id; + } + outEvent->type = DEVICE_REMOVED; + outEvent->when = systemTime(SYSTEM_TIME_MONOTONIC); + delete device; + mNeedToSendFinishedDeviceScan = true; + return true; + } + + if (mOpeningDevices != NULL) { + Device* device = mOpeningDevices; + LOGV("Reporting device opened: id=%d, name=%s\n", + device->id, device->path.string()); + mOpeningDevices = device->next; + if (device->id == mBuiltInKeyboardId) { + outEvent->deviceId = 0; + } else { + outEvent->deviceId = device->id; + } + outEvent->type = DEVICE_ADDED; + outEvent->when = systemTime(SYSTEM_TIME_MONOTONIC); + mNeedToSendFinishedDeviceScan = true; + return true; + } + + if (mNeedToSendFinishedDeviceScan) { + mNeedToSendFinishedDeviceScan = false; + outEvent->type = FINISHED_DEVICE_SCAN; + outEvent->when = systemTime(SYSTEM_TIME_MONOTONIC); + return true; + } + + // Grab the next input event. + for (;;) { + // Consume buffered input events, if any. + if (mInputBufferIndex < mInputBufferCount) { + const struct input_event& iev = mInputBufferData[mInputBufferIndex++]; + const Device* device = mDevices[mInputFdIndex]; + + LOGV("%s got: t0=%d, t1=%d, type=%d, code=%d, v=%d", device->path.string(), + (int) iev.time.tv_sec, (int) iev.time.tv_usec, iev.type, iev.code, iev.value); + if (device->id == mBuiltInKeyboardId) { + outEvent->deviceId = 0; + } else { + outEvent->deviceId = device->id; + } + outEvent->type = iev.type; + outEvent->scanCode = iev.code; + outEvent->flags = 0; + if (iev.type == EV_KEY) { + outEvent->keyCode = AKEYCODE_UNKNOWN; + if (device->keyMap.haveKeyLayout()) { + status_t err = device->keyMap.keyLayoutMap->map(iev.code, + &outEvent->keyCode, &outEvent->flags); + LOGV("iev.code=%d keyCode=%d flags=0x%08x err=%d\n", + iev.code, outEvent->keyCode, outEvent->flags, err); + } + } else { + outEvent->keyCode = iev.code; + } + outEvent->value = iev.value; + + // Use an event timestamp in the same timebase as + // java.lang.System.nanoTime() and android.os.SystemClock.uptimeMillis() + // as expected by the rest of the system. + outEvent->when = systemTime(SYSTEM_TIME_MONOTONIC); + return true; + } + + // Finish reading all events from devices identified in previous poll(). + // This code assumes that mInputDeviceIndex is initially 0 and that the + // revents member of pollfd is initialized to 0 when the device is first added. + // Since mFds[0] is used for inotify, we process regular events starting at index 1. + mInputFdIndex += 1; + if (mInputFdIndex >= mFds.size()) { + break; + } + + const struct pollfd& pfd = mFds[mInputFdIndex]; + if (pfd.revents & POLLIN) { + int32_t readSize = read(pfd.fd, mInputBufferData, + sizeof(struct input_event) * INPUT_BUFFER_SIZE); + if (readSize < 0) { + if (errno != EAGAIN && errno != EINTR) { + LOGW("could not get event (errno=%d)", errno); + } + } else if ((readSize % sizeof(struct input_event)) != 0) { + LOGE("could not get event (wrong size: %d)", readSize); + } else { + mInputBufferCount = size_t(readSize) / sizeof(struct input_event); + mInputBufferIndex = 0; + } + } + } + +#if HAVE_INOTIFY + // readNotify() will modify mFDs and mFDCount, so this must be done after + // processing all other events. + if(mFds[0].revents & POLLIN) { + readNotify(mFds[0].fd); + mFds.editItemAt(0).revents = 0; + continue; // report added or removed devices immediately + } +#endif + + mInputFdIndex = 0; + + // Poll for events. Mind the wake lock dance! + // We hold a wake lock at all times except during poll(). This works due to some + // subtle choreography. When a device driver has pending (unread) events, it acquires + // a kernel wake lock. However, once the last pending event has been read, the device + // driver will release the kernel wake lock. To prevent the system from going to sleep + // when this happens, the EventHub holds onto its own user wake lock while the client + // is processing events. Thus the system can only sleep if there are no events + // pending or currently being processed. + release_wake_lock(WAKE_LOCK_ID); + + int pollResult = poll(mFds.editArray(), mFds.size(), -1); + + acquire_wake_lock(PARTIAL_WAKE_LOCK, WAKE_LOCK_ID); + + if (pollResult <= 0) { + if (errno != EINTR) { + LOGW("poll failed (errno=%d)\n", errno); + usleep(100000); + } + } + } +} + +/* + * Open the platform-specific input device. + */ +bool EventHub::openPlatformInput(void) { + /* + * Open platform-specific input device(s). + */ + int res, fd; + +#ifdef HAVE_INOTIFY + fd = inotify_init(); + res = inotify_add_watch(fd, DEVICE_PATH, IN_DELETE | IN_CREATE); + if(res < 0) { + LOGE("could not add watch for %s, %s\n", DEVICE_PATH, strerror(errno)); + } +#else + /* + * The code in EventHub::getEvent assumes that mFDs[0] is an inotify fd. + * We allocate space for it and set it to something invalid. + */ + fd = -1; +#endif + + // Reserve fd index 0 for inotify. + struct pollfd pollfd; + pollfd.fd = fd; + pollfd.events = POLLIN; + pollfd.revents = 0; + mFds.push(pollfd); + mDevices.push(NULL); + + res = scanDir(DEVICE_PATH); + if(res < 0) { + LOGE("scan dir failed for %s\n", DEVICE_PATH); + } + + return true; +} + +// ---------------------------------------------------------------------------- + +static bool containsNonZeroByte(const uint8_t* array, uint32_t startIndex, uint32_t endIndex) { + const uint8_t* end = array + endIndex; + array += startIndex; + while (array != end) { + if (*(array++) != 0) { + return true; + } + } + return false; +} + +static const int32_t GAMEPAD_KEYCODES[] = { + AKEYCODE_BUTTON_A, AKEYCODE_BUTTON_B, AKEYCODE_BUTTON_C, + AKEYCODE_BUTTON_X, AKEYCODE_BUTTON_Y, AKEYCODE_BUTTON_Z, + AKEYCODE_BUTTON_L1, AKEYCODE_BUTTON_R1, + AKEYCODE_BUTTON_L2, AKEYCODE_BUTTON_R2, + AKEYCODE_BUTTON_THUMBL, AKEYCODE_BUTTON_THUMBR, + AKEYCODE_BUTTON_START, AKEYCODE_BUTTON_SELECT, AKEYCODE_BUTTON_MODE +}; + +int EventHub::openDevice(const char *devicePath) { + char buffer[80]; + + LOGV("Opening device: %s", devicePath); + + AutoMutex _l(mLock); + + int fd = open(devicePath, O_RDWR); + if(fd < 0) { + LOGE("could not open %s, %s\n", devicePath, strerror(errno)); + return -1; + } + + InputDeviceIdentifier identifier; + + // Get device name. + if(ioctl(fd, EVIOCGNAME(sizeof(buffer) - 1), &buffer) < 1) { + //fprintf(stderr, "could not get device name for %s, %s\n", devicePath, strerror(errno)); + } else { + buffer[sizeof(buffer) - 1] = '\0'; + identifier.name.setTo(buffer); + } + + // Check to see if the device is on our excluded list + List<String8>::iterator iter = mExcludedDevices.begin(); + List<String8>::iterator end = mExcludedDevices.end(); + for ( ; iter != end; iter++) { + const char* test = *iter; + if (identifier.name == test) { + LOGI("ignoring event id %s driver %s\n", devicePath, test); + close(fd); + return -1; + } + } + + // Get device driver version. + int driverVersion; + if(ioctl(fd, EVIOCGVERSION, &driverVersion)) { + LOGE("could not get driver version for %s, %s\n", devicePath, strerror(errno)); + close(fd); + return -1; + } + + // Get device identifier. + struct input_id inputId; + if(ioctl(fd, EVIOCGID, &inputId)) { + LOGE("could not get device input id for %s, %s\n", devicePath, strerror(errno)); + close(fd); + return -1; + } + identifier.bus = inputId.bustype; + identifier.product = inputId.product; + identifier.vendor = inputId.vendor; + identifier.version = inputId.version; + + // Get device physical location. + if(ioctl(fd, EVIOCGPHYS(sizeof(buffer) - 1), &buffer) < 1) { + //fprintf(stderr, "could not get location for %s, %s\n", devicePath, strerror(errno)); + } else { + buffer[sizeof(buffer) - 1] = '\0'; + identifier.location.setTo(buffer); + } + + // Get device unique id. + if(ioctl(fd, EVIOCGUNIQ(sizeof(buffer) - 1), &buffer) < 1) { + //fprintf(stderr, "could not get idstring for %s, %s\n", devicePath, strerror(errno)); + } else { + buffer[sizeof(buffer) - 1] = '\0'; + identifier.uniqueId.setTo(buffer); + } + + // Make file descriptor non-blocking for use with poll(). + if (fcntl(fd, F_SETFL, O_NONBLOCK)) { + LOGE("Error %d making device file descriptor non-blocking.", errno); + close(fd); + return -1; + } + + // Allocate device. (The device object takes ownership of the fd at this point.) + int32_t deviceId = mNextDeviceId++; + Device* device = new Device(fd, deviceId, String8(devicePath), identifier); + +#if 0 + LOGI("add device %d: %s\n", deviceId, devicePath); + LOGI(" bus: %04x\n" + " vendor %04x\n" + " product %04x\n" + " version %04x\n", + identifier.bus, identifier.vendor, identifier.product, identifier.version); + LOGI(" name: \"%s\"\n", identifier.name.string()); + LOGI(" location: \"%s\"\n", identifier.location.string()); + LOGI(" unique id: \"%s\"\n", identifier.uniqueId.string()); + LOGI(" driver: v%d.%d.%d\n", + driverVersion >> 16, (driverVersion >> 8) & 0xff, driverVersion & 0xff); +#endif + + // Load the configuration file for the device. + loadConfiguration(device); + + // Figure out the kinds of events the device reports. + + uint8_t key_bitmask[sizeof_bit_array(KEY_MAX + 1)]; + memset(key_bitmask, 0, sizeof(key_bitmask)); + + LOGV("Getting keys..."); + if (ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(key_bitmask)), key_bitmask) >= 0) { + //LOGI("MAP\n"); + //for (int i = 0; i < sizeof(key_bitmask); i++) { + // LOGI("%d: 0x%02x\n", i, key_bitmask[i]); + //} + + // See if this is a keyboard. Ignore everything in the button range except for + // gamepads which are also considered keyboards. + if (containsNonZeroByte(key_bitmask, 0, sizeof_bit_array(BTN_MISC)) + || containsNonZeroByte(key_bitmask, sizeof_bit_array(BTN_GAMEPAD), + sizeof_bit_array(BTN_DIGI)) + || containsNonZeroByte(key_bitmask, sizeof_bit_array(KEY_OK), + sizeof_bit_array(KEY_MAX + 1))) { + device->classes |= INPUT_DEVICE_CLASS_KEYBOARD; + + device->keyBitmask = new uint8_t[sizeof(key_bitmask)]; + if (device->keyBitmask != NULL) { + memcpy(device->keyBitmask, key_bitmask, sizeof(key_bitmask)); + } else { + delete device; + LOGE("out of memory allocating key bitmask"); + return -1; + } + } + } + + // See if this is a cursor device such as a trackball or mouse. + if (test_bit(BTN_MOUSE, key_bitmask)) { + uint8_t rel_bitmask[sizeof_bit_array(REL_MAX + 1)]; + memset(rel_bitmask, 0, sizeof(rel_bitmask)); + LOGV("Getting relative controllers..."); + if (ioctl(fd, EVIOCGBIT(EV_REL, sizeof(rel_bitmask)), rel_bitmask) >= 0) { + if (test_bit(REL_X, rel_bitmask) && test_bit(REL_Y, rel_bitmask)) { + device->classes |= INPUT_DEVICE_CLASS_CURSOR; + } + } + } + + // See if this is a touch pad. + uint8_t abs_bitmask[sizeof_bit_array(ABS_MAX + 1)]; + memset(abs_bitmask, 0, sizeof(abs_bitmask)); + LOGV("Getting absolute controllers..."); + if (ioctl(fd, EVIOCGBIT(EV_ABS, sizeof(abs_bitmask)), abs_bitmask) >= 0) { + // Is this a new modern multi-touch driver? + if (test_bit(ABS_MT_POSITION_X, abs_bitmask) + && test_bit(ABS_MT_POSITION_Y, abs_bitmask)) { + device->classes |= INPUT_DEVICE_CLASS_TOUCHSCREEN | INPUT_DEVICE_CLASS_TOUCHSCREEN_MT; + + // Is this an old style single-touch driver? + } else if (test_bit(BTN_TOUCH, key_bitmask) + && test_bit(ABS_X, abs_bitmask) && test_bit(ABS_Y, abs_bitmask)) { + device->classes |= INPUT_DEVICE_CLASS_TOUCHSCREEN; + } + } + +#ifdef EV_SW + // figure out the switches this device reports + uint8_t sw_bitmask[sizeof_bit_array(SW_MAX + 1)]; + memset(sw_bitmask, 0, sizeof(sw_bitmask)); + bool hasSwitches = false; + if (ioctl(fd, EVIOCGBIT(EV_SW, sizeof(sw_bitmask)), sw_bitmask) >= 0) { + for (int i=0; i<EV_SW; i++) { + //LOGI("Device %d sw %d: has=%d", device->id, i, test_bit(i, sw_bitmask)); + if (test_bit(i, sw_bitmask)) { + hasSwitches = true; + if (mSwitches[i] == 0) { + mSwitches[i] = device->id; + } + } + } + } + if (hasSwitches) { + device->classes |= INPUT_DEVICE_CLASS_SWITCH; + } +#endif + + if ((device->classes & INPUT_DEVICE_CLASS_TOUCHSCREEN)) { + // Load the virtual keys for the touch screen, if any. + // We do this now so that we can make sure to load the keymap if necessary. + status_t status = loadVirtualKeyMap(device); + if (!status) { + device->classes |= INPUT_DEVICE_CLASS_KEYBOARD; + } + } + + if ((device->classes & INPUT_DEVICE_CLASS_KEYBOARD) != 0) { + // Load the keymap for the device. + status_t status = loadKeyMap(device); + + // Set system properties for the keyboard. + setKeyboardProperties(device, false); + + // Register the keyboard as a built-in keyboard if it is eligible. + if (!status + && mBuiltInKeyboardId == -1 + && isEligibleBuiltInKeyboard(device->identifier, + device->configuration, &device->keyMap)) { + mBuiltInKeyboardId = device->id; + setKeyboardProperties(device, true); + } + + // 'Q' key support = cheap test of whether this is an alpha-capable kbd + if (hasKeycodeLocked(device, AKEYCODE_Q)) { + device->classes |= INPUT_DEVICE_CLASS_ALPHAKEY; + } + + // See if this device has a DPAD. + if (hasKeycodeLocked(device, AKEYCODE_DPAD_UP) && + hasKeycodeLocked(device, AKEYCODE_DPAD_DOWN) && + hasKeycodeLocked(device, AKEYCODE_DPAD_LEFT) && + hasKeycodeLocked(device, AKEYCODE_DPAD_RIGHT) && + hasKeycodeLocked(device, AKEYCODE_DPAD_CENTER)) { + device->classes |= INPUT_DEVICE_CLASS_DPAD; + } + + // See if this device has a gamepad. + for (size_t i = 0; i < sizeof(GAMEPAD_KEYCODES)/sizeof(GAMEPAD_KEYCODES[0]); i++) { + if (hasKeycodeLocked(device, GAMEPAD_KEYCODES[i])) { + device->classes |= INPUT_DEVICE_CLASS_GAMEPAD; + break; + } + } + } + + // If the device isn't recognized as something we handle, don't monitor it. + if (device->classes == 0) { + LOGV("Dropping device: id=%d, path='%s', name='%s'", + deviceId, devicePath, device->identifier.name.string()); + delete device; + return -1; + } + + LOGI("New device: id=%d, fd=%d, path='%s', name='%s', classes=0x%x, " + "configuration='%s', keyLayout='%s', keyCharacterMap='%s', builtinKeyboard=%s", + deviceId, fd, devicePath, device->identifier.name.string(), + device->classes, + device->configurationFile.string(), + device->keyMap.keyLayoutFile.string(), + device->keyMap.keyCharacterMapFile.string(), + toString(mBuiltInKeyboardId == deviceId)); + + struct pollfd pollfd; + pollfd.fd = fd; + pollfd.events = POLLIN; + pollfd.revents = 0; + mFds.push(pollfd); + mDevices.push(device); + + device->next = mOpeningDevices; + mOpeningDevices = device; + return 0; +} + +void EventHub::loadConfiguration(Device* device) { + device->configurationFile = getInputDeviceConfigurationFilePathByDeviceIdentifier( + device->identifier, INPUT_DEVICE_CONFIGURATION_FILE_TYPE_CONFIGURATION); + if (device->configurationFile.isEmpty()) { + LOGD("No input device configuration file found for device '%s'.", + device->identifier.name.string()); + } else { + status_t status = PropertyMap::load(device->configurationFile, + &device->configuration); + if (status) { + LOGE("Error loading input device configuration file for device '%s'. " + "Using default configuration.", + device->identifier.name.string()); + } + } +} + +status_t EventHub::loadVirtualKeyMap(Device* device) { + // The virtual key map is supplied by the kernel as a system board property file. + String8 path; + path.append("/sys/board_properties/virtualkeys."); + path.append(device->identifier.name); + if (access(path.string(), R_OK)) { + return NAME_NOT_FOUND; + } + return VirtualKeyMap::load(path, &device->virtualKeyMap); +} + +status_t EventHub::loadKeyMap(Device* device) { + return device->keyMap.load(device->identifier, device->configuration); +} + +void EventHub::setKeyboardProperties(Device* device, bool builtInKeyboard) { + int32_t id = builtInKeyboard ? 0 : device->id; + android::setKeyboardProperties(id, device->identifier, + device->keyMap.keyLayoutFile, device->keyMap.keyCharacterMapFile); +} + +void EventHub::clearKeyboardProperties(Device* device, bool builtInKeyboard) { + int32_t id = builtInKeyboard ? 0 : device->id; + android::clearKeyboardProperties(id); +} + +bool EventHub::hasKeycodeLocked(Device* device, int keycode) const { + if (!device->keyMap.haveKeyLayout() || !device->keyBitmask) { + return false; + } + + Vector<int32_t> scanCodes; + device->keyMap.keyLayoutMap->findScanCodes(keycode, &scanCodes); + const size_t N = scanCodes.size(); + for (size_t i=0; i<N && i<=KEY_MAX; i++) { + int32_t sc = scanCodes.itemAt(i); + if (sc >= 0 && sc <= KEY_MAX && test_bit(sc, device->keyBitmask)) { + return true; + } + } + + return false; +} + +int EventHub::closeDevice(const char *devicePath) { + AutoMutex _l(mLock); + + for (size_t i = FIRST_ACTUAL_DEVICE_INDEX; i < mDevices.size(); i++) { + Device* device = mDevices[i]; + if (device->path == devicePath) { + LOGI("Removed device: path=%s name=%s id=%d fd=%d classes=0x%x\n", + device->path.string(), device->identifier.name.string(), device->id, + device->fd, device->classes); + +#ifdef EV_SW + for (int j=0; j<EV_SW; j++) { + if (mSwitches[j] == device->id) { + mSwitches[j] = 0; + } + } +#endif + + if (device->id == mBuiltInKeyboardId) { + LOGW("built-in keyboard device %s (id=%d) is closing! the apps will not like this", + device->path.string(), mBuiltInKeyboardId); + mBuiltInKeyboardId = -1; + clearKeyboardProperties(device, true); + } + clearKeyboardProperties(device, false); + + mFds.removeAt(i); + mDevices.removeAt(i); + device->close(); + + device->next = mClosingDevices; + mClosingDevices = device; + return 0; + } + } + LOGE("remove device: %s not found\n", devicePath); + return -1; +} + +int EventHub::readNotify(int nfd) { +#ifdef HAVE_INOTIFY + int res; + char devname[PATH_MAX]; + char *filename; + char event_buf[512]; + int event_size; + int event_pos = 0; + struct inotify_event *event; + + LOGV("EventHub::readNotify nfd: %d\n", nfd); + res = read(nfd, event_buf, sizeof(event_buf)); + if(res < (int)sizeof(*event)) { + if(errno == EINTR) + return 0; + LOGW("could not get event, %s\n", strerror(errno)); + return 1; + } + //printf("got %d bytes of event information\n", res); + + strcpy(devname, DEVICE_PATH); + filename = devname + strlen(devname); + *filename++ = '/'; + + while(res >= (int)sizeof(*event)) { + event = (struct inotify_event *)(event_buf + event_pos); + //printf("%d: %08x \"%s\"\n", event->wd, event->mask, event->len ? event->name : ""); + if(event->len) { + strcpy(filename, event->name); + if(event->mask & IN_CREATE) { + openDevice(devname); + } + else { + closeDevice(devname); + } + } + event_size = sizeof(*event) + event->len; + res -= event_size; + event_pos += event_size; + } +#endif + return 0; +} + +int EventHub::scanDir(const char *dirname) +{ + char devname[PATH_MAX]; + char *filename; + DIR *dir; + struct dirent *de; + dir = opendir(dirname); + if(dir == NULL) + return -1; + strcpy(devname, dirname); + filename = devname + strlen(devname); + *filename++ = '/'; + while((de = readdir(dir))) { + if(de->d_name[0] == '.' && + (de->d_name[1] == '\0' || + (de->d_name[1] == '.' && de->d_name[2] == '\0'))) + continue; + strcpy(filename, de->d_name); + openDevice(devname); + } + closedir(dir); + return 0; +} + +void EventHub::dump(String8& dump) { + dump.append("Event Hub State:\n"); + + { // acquire lock + AutoMutex _l(mLock); + + dump.appendFormat(INDENT "BuiltInKeyboardId: %d\n", mBuiltInKeyboardId); + + dump.append(INDENT "Devices:\n"); + + for (size_t i = FIRST_ACTUAL_DEVICE_INDEX; i < mDevices.size(); i++) { + const Device* device = mDevices[i]; + if (device) { + if (mBuiltInKeyboardId == device->id) { + dump.appendFormat(INDENT2 "%d: %s (aka device 0 - built-in keyboard)\n", + device->id, device->identifier.name.string()); + } else { + dump.appendFormat(INDENT2 "%d: %s\n", device->id, + device->identifier.name.string()); + } + dump.appendFormat(INDENT3 "Classes: 0x%08x\n", device->classes); + dump.appendFormat(INDENT3 "Path: %s\n", device->path.string()); + dump.appendFormat(INDENT3 "Location: %s\n", device->identifier.location.string()); + dump.appendFormat(INDENT3 "UniqueId: %s\n", device->identifier.uniqueId.string()); + dump.appendFormat(INDENT3 "Identifier: bus=0x%04x, vendor=0x%04x, " + "product=0x%04x, version=0x%04x\n", + device->identifier.bus, device->identifier.vendor, + device->identifier.product, device->identifier.version); + dump.appendFormat(INDENT3 "KeyLayoutFile: %s\n", + device->keyMap.keyLayoutFile.string()); + dump.appendFormat(INDENT3 "KeyCharacterMapFile: %s\n", + device->keyMap.keyCharacterMapFile.string()); + dump.appendFormat(INDENT3 "ConfigurationFile: %s\n", + device->configurationFile.string()); + } + } + } // release lock +} + +}; // namespace android |