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-rw-r--r--services/input/EventHub.cpp186
1 files changed, 101 insertions, 85 deletions
diff --git a/services/input/EventHub.cpp b/services/input/EventHub.cpp
index 665d711..2ba821e 100644
--- a/services/input/EventHub.cpp
+++ b/services/input/EventHub.cpp
@@ -93,6 +93,34 @@ static String8 sha1(const String8& in) {
return out;
}
+static void setDescriptor(InputDeviceIdentifier& identifier) {
+ // Compute a device descriptor that uniquely identifies the device.
+ // The descriptor is assumed to be a stable identifier. Its value should not
+ // change between reboots, reconnections, firmware updates or new releases of Android.
+ // Ideally, we also want the descriptor to be short and relatively opaque.
+ String8 rawDescriptor;
+ rawDescriptor.appendFormat(":%04x:%04x:", identifier.vendor, identifier.product);
+ if (!identifier.uniqueId.isEmpty()) {
+ rawDescriptor.append("uniqueId:");
+ rawDescriptor.append(identifier.uniqueId);
+ } if (identifier.vendor == 0 && identifier.product == 0) {
+ // If we don't know the vendor and product id, then the device is probably
+ // built-in so we need to rely on other information to uniquely identify
+ // the input device. Usually we try to avoid relying on the device name or
+ // location but for built-in input device, they are unlikely to ever change.
+ if (!identifier.name.isEmpty()) {
+ rawDescriptor.append("name:");
+ rawDescriptor.append(identifier.name);
+ } else if (!identifier.location.isEmpty()) {
+ rawDescriptor.append("location:");
+ rawDescriptor.append(identifier.location);
+ }
+ }
+ identifier.descriptor = sha1(rawDescriptor);
+ ALOGV("Created descriptor: raw=%s, cooked=%s", rawDescriptor.string(),
+ identifier.descriptor.string());
+}
+
// --- Global Functions ---
uint32_t getAbsAxisUsage(int32_t axis, uint32_t deviceClasses) {
@@ -164,7 +192,7 @@ const int EventHub::EPOLL_SIZE_HINT;
const int EventHub::EPOLL_MAX_EVENTS;
EventHub::EventHub(void) :
- mBuiltInKeyboardId(-1), mNextDeviceId(1),
+ mBuiltInKeyboardId(NO_BUILT_IN_KEYBOARD), mNextDeviceId(1),
mOpeningDevices(0), mClosingDevices(0),
mNeedToSendFinishedDeviceScan(false),
mNeedToReopenDevices(false), mNeedToScanDevices(true),
@@ -256,7 +284,7 @@ status_t EventHub::getAbsoluteAxisInfo(int32_t deviceId, int axis,
AutoMutex _l(mLock);
Device* device = getDeviceLocked(deviceId);
- if (device && test_bit(axis, device->absBitmask)) {
+ if (device && !device->isVirtual() && test_bit(axis, device->absBitmask)) {
struct input_absinfo info;
if(ioctl(device->fd, EVIOCGABS(axis), &info)) {
ALOGW("Error reading absolute controller %d for device %s fd %d, errno=%d",
@@ -307,7 +335,7 @@ int32_t EventHub::getScanCodeState(int32_t deviceId, int32_t scanCode) const {
AutoMutex _l(mLock);
Device* device = getDeviceLocked(deviceId);
- if (device && test_bit(scanCode, device->keyBitmask)) {
+ if (device && !device->isVirtual() && test_bit(scanCode, device->keyBitmask)) {
uint8_t keyState[sizeof_bit_array(KEY_MAX + 1)];
memset(keyState, 0, sizeof(keyState));
if (ioctl(device->fd, EVIOCGKEY(sizeof(keyState)), keyState) >= 0) {
@@ -322,7 +350,7 @@ int32_t EventHub::getKeyCodeState(int32_t deviceId, int32_t keyCode) const {
AutoMutex _l(mLock);
Device* device = getDeviceLocked(deviceId);
- if (device && device->keyMap.haveKeyLayout()) {
+ if (device && !device->isVirtual() && device->keyMap.haveKeyLayout()) {
Vector<int32_t> scanCodes;
device->keyMap.keyLayoutMap->findScanCodesForKey(keyCode, &scanCodes);
if (scanCodes.size() != 0) {
@@ -347,7 +375,7 @@ int32_t EventHub::getSwitchState(int32_t deviceId, int32_t sw) const {
AutoMutex _l(mLock);
Device* device = getDeviceLocked(deviceId);
- if (device && test_bit(sw, device->swBitmask)) {
+ if (device && !device->isVirtual() && test_bit(sw, device->swBitmask)) {
uint8_t swState[sizeof_bit_array(SW_MAX + 1)];
memset(swState, 0, sizeof(swState));
if (ioctl(device->fd, EVIOCGSW(sizeof(swState)), swState) >= 0) {
@@ -365,7 +393,7 @@ status_t EventHub::getAbsoluteAxisValue(int32_t deviceId, int32_t axis, int32_t*
AutoMutex _l(mLock);
Device* device = getDeviceLocked(deviceId);
- if (device && test_bit(axis, device->absBitmask)) {
+ if (device && !device->isVirtual() && test_bit(axis, device->absBitmask)) {
struct input_absinfo info;
if(ioctl(device->fd, EVIOCGABS(axis), &info)) {
ALOGW("Error reading absolute controller %d for device %s fd %d, errno=%d",
@@ -408,58 +436,35 @@ bool EventHub::markSupportedKeyCodes(int32_t deviceId, size_t numCodes,
return false;
}
-status_t EventHub::mapKey(int32_t deviceId, int scancode,
- int32_t* outKeycode, uint32_t* outFlags) const
-{
+status_t EventHub::mapKey(int32_t deviceId, int32_t scanCode, int32_t usageCode,
+ 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->mapKey(scancode, outKeycode, outFlags);
+ status_t err = device->keyMap.keyLayoutMap->mapKey(
+ scanCode, usageCode, 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->mapKey(scancode, outKeycode, outFlags);
- if (err == NO_ERROR) {
- return NO_ERROR;
- }
- }
- }
-
+
*outKeycode = 0;
*outFlags = 0;
return NAME_NOT_FOUND;
}
-status_t EventHub::mapAxis(int32_t deviceId, int scancode, AxisInfo* outAxisInfo) const
-{
+status_t EventHub::mapAxis(int32_t deviceId, int32_t scanCode, AxisInfo* outAxisInfo) const {
AutoMutex _l(mLock);
Device* device = getDeviceLocked(deviceId);
if (device && device->keyMap.haveKeyLayout()) {
- status_t err = device->keyMap.keyLayoutMap->mapAxis(scancode, outAxisInfo);
+ status_t err = device->keyMap.keyLayoutMap->mapAxis(scanCode, outAxisInfo);
if (err == NO_ERROR) {
return NO_ERROR;
}
}
- if (mBuiltInKeyboardId != -1) {
- device = getDeviceLocked(mBuiltInKeyboardId);
-
- if (device && device->keyMap.haveKeyLayout()) {
- status_t err = device->keyMap.keyLayoutMap->mapAxis(scancode, outAxisInfo);
- if (err == NO_ERROR) {
- return NO_ERROR;
- }
- }
- }
-
return NAME_NOT_FOUND;
}
@@ -494,7 +499,7 @@ bool EventHub::hasLed(int32_t deviceId, int32_t led) const {
void EventHub::setLedState(int32_t deviceId, int32_t led, bool on) {
AutoMutex _l(mLock);
Device* device = getDeviceLocked(deviceId);
- if (device && led >= 0 && led <= LED_MAX) {
+ if (device && !device->isVirtual() && led >= 0 && led <= LED_MAX) {
struct input_event ev;
ev.time.tv_sec = 0;
ev.time.tv_usec = 0;
@@ -520,17 +525,17 @@ void EventHub::getVirtualKeyDefinitions(int32_t deviceId,
}
}
-String8 EventHub::getKeyCharacterMapFile(int32_t deviceId) const {
+sp<KeyCharacterMap> EventHub::getKeyCharacterMap(int32_t deviceId) const {
AutoMutex _l(mLock);
Device* device = getDeviceLocked(deviceId);
if (device) {
- return device->keyMap.keyCharacterMapFile;
+ return device->keyMap.keyCharacterMap;
}
- return String8();
+ return NULL;
}
EventHub::Device* EventHub::getDeviceLocked(int32_t deviceId) const {
- if (deviceId == 0) {
+ if (deviceId == BUILT_IN_KEYBOARD_ID) {
deviceId = mBuiltInKeyboardId;
}
ssize_t index = mDevices.indexOfKey(deviceId);
@@ -578,7 +583,7 @@ size_t EventHub::getEvents(int timeoutMillis, RawEvent* buffer, size_t bufferSiz
device->id, device->path.string());
mClosingDevices = device->next;
event->when = now;
- event->deviceId = device->id == mBuiltInKeyboardId ? 0 : device->id;
+ event->deviceId = device->id == mBuiltInKeyboardId ? BUILT_IN_KEYBOARD_ID : device->id;
event->type = DEVICE_REMOVED;
event += 1;
delete device;
@@ -703,16 +708,8 @@ size_t EventHub::getEvents(int timeoutMillis, RawEvent* buffer, size_t bufferSiz
#endif
event->deviceId = deviceId;
event->type = iev.type;
- event->scanCode = iev.code;
+ event->code = iev.code;
event->value = iev.value;
- event->keyCode = AKEYCODE_UNKNOWN;
- event->flags = 0;
- if (iev.type == EV_KEY && device->keyMap.haveKeyLayout()) {
- status_t err = device->keyMap.keyLayoutMap->mapKey(iev.code,
- &event->keyCode, &event->flags);
- ALOGV("iev.code=%d keyCode=%d flags=0x%08x err=%d\n",
- iev.code, event->keyCode, event->flags, err);
- }
event += 1;
}
capacity -= count;
@@ -813,6 +810,9 @@ void EventHub::scanDevicesLocked() {
if(res < 0) {
ALOGE("scan dir failed for %s\n", DEVICE_PATH);
}
+ if (mDevices.indexOfKey(VIRTUAL_KEYBOARD_ID) < 0) {
+ createVirtualKeyboardLocked();
+ }
}
// ----------------------------------------------------------------------------
@@ -908,29 +908,8 @@ status_t EventHub::openDeviceLocked(const char *devicePath) {
identifier.uniqueId.setTo(buffer);
}
- // Compute a device descriptor that uniquely identifies the device.
- // The descriptor is assumed to be a stable identifier. Its value should not
- // change between reboots, reconnections, firmware updates or new releases of Android.
- // Ideally, we also want the descriptor to be short and relatively opaque.
- String8 rawDescriptor;
- rawDescriptor.appendFormat(":%04x:%04x:", identifier.vendor, identifier.product);
- if (!identifier.uniqueId.isEmpty()) {
- rawDescriptor.append("uniqueId:");
- rawDescriptor.append(identifier.uniqueId);
- } if (identifier.vendor == 0 && identifier.product == 0) {
- // If we don't know the vendor and product id, then the device is probably
- // built-in so we need to rely on other information to uniquely identify
- // the input device. Usually we try to avoid relying on the device name or
- // location but for built-in input device, they are unlikely to ever change.
- if (!identifier.name.isEmpty()) {
- rawDescriptor.append("name:");
- rawDescriptor.append(identifier.name);
- } else if (!identifier.location.isEmpty()) {
- rawDescriptor.append("location:");
- rawDescriptor.append(identifier.location);
- }
- }
- identifier.descriptor = sha1(rawDescriptor);
+ // Fill in the descriptor.
+ setDescriptor(identifier);
// Make file descriptor non-blocking for use with poll().
if (fcntl(fd, F_SETFL, O_NONBLOCK)) {
@@ -952,7 +931,7 @@ status_t EventHub::openDeviceLocked(const char *devicePath) {
ALOGV(" name: \"%s\"\n", identifier.name.string());
ALOGV(" location: \"%s\"\n", identifier.location.string());
ALOGV(" unique id: \"%s\"\n", identifier.uniqueId.string());
- ALOGV(" descriptor: \"%s\" (%s)\n", identifier.descriptor.string(), rawDescriptor.string());
+ ALOGV(" descriptor: \"%s\"\n", identifier.descriptor.string());
ALOGV(" driver: v%d.%d.%d\n",
driverVersion >> 16, (driverVersion >> 8) & 0xff, driverVersion & 0xff);
@@ -1048,7 +1027,7 @@ status_t EventHub::openDeviceLocked(const char *devicePath) {
if (device->classes & INPUT_DEVICE_CLASS_KEYBOARD) {
// Register the keyboard as a built-in keyboard if it is eligible.
if (!keyMapStatus
- && mBuiltInKeyboardId == -1
+ && mBuiltInKeyboardId == NO_BUILT_IN_KEYBOARD
&& isEligibleBuiltInKeyboard(device->identifier,
device->configuration, &device->keyMap)) {
mBuiltInKeyboardId = device->id;
@@ -1103,24 +1082,59 @@ status_t EventHub::openDeviceLocked(const char *devicePath) {
// Enable wake-lock behavior on kernels that support it.
// TODO: Only need this for devices that can really wake the system.
- bool usingSuspendBlock = ioctl(fd, EVIOCSSUSPENDBLOCK, 1) == 0;
+ bool usingSuspendBlockIoctl = !ioctl(fd, EVIOCSSUSPENDBLOCK, 1);
+
+ // Tell the kernel that we want to use the monotonic clock for reporting timestamps
+ // associated with input events. This is important because the input system
+ // uses the timestamps extensively and assumes they were recorded using the monotonic
+ // clock.
+ //
+ // In older kernel, before Linux 3.4, there was no way to tell the kernel which
+ // clock to use to input event timestamps. The standard kernel behavior was to
+ // record a real time timestamp, which isn't what we want. Android kernels therefore
+ // contained a patch to the evdev_event() function in drivers/input/evdev.c to
+ // replace the call to do_gettimeofday() with ktime_get_ts() to cause the monotonic
+ // clock to be used instead of the real time clock.
+ //
+ // As of Linux 3.4, there is a new EVIOCSCLOCKID ioctl to set the desired clock.
+ // Therefore, we no longer require the Android-specific kernel patch described above
+ // as long as we make sure to set select the monotonic clock. We do that here.
+ bool usingClockIoctl = !ioctl(fd, EVIOCSCLOCKID, CLOCK_MONOTONIC);
ALOGI("New device: id=%d, fd=%d, path='%s', name='%s', classes=0x%x, "
"configuration='%s', keyLayout='%s', keyCharacterMap='%s', builtinKeyboard=%s, "
- "usingSuspendBlock=%s",
+ "usingSuspendBlockIoctl=%s, usingClockIoctl=%s",
deviceId, fd, devicePath, device->identifier.name.string(),
device->classes,
device->configurationFile.string(),
device->keyMap.keyLayoutFile.string(),
device->keyMap.keyCharacterMapFile.string(),
toString(mBuiltInKeyboardId == deviceId),
- toString(usingSuspendBlock));
+ toString(usingSuspendBlockIoctl), toString(usingClockIoctl));
- mDevices.add(deviceId, device);
+ addDeviceLocked(device);
+ return 0;
+}
+void EventHub::createVirtualKeyboardLocked() {
+ InputDeviceIdentifier identifier;
+ identifier.name = "Virtual";
+ identifier.uniqueId = "<virtual>";
+ setDescriptor(identifier);
+
+ Device* device = new Device(-1, VIRTUAL_KEYBOARD_ID, String8("<virtual>"), identifier);
+ device->classes = INPUT_DEVICE_CLASS_KEYBOARD
+ | INPUT_DEVICE_CLASS_ALPHAKEY
+ | INPUT_DEVICE_CLASS_DPAD
+ | INPUT_DEVICE_CLASS_VIRTUAL;
+ loadKeyMapLocked(device);
+ addDeviceLocked(device);
+}
+
+void EventHub::addDeviceLocked(Device* device) {
+ mDevices.add(device->id, device);
device->next = mOpeningDevices;
mOpeningDevices = device;
- return 0;
}
void EventHub::loadConfigurationLocked(Device* device) {
@@ -1207,11 +1221,13 @@ void EventHub::closeDeviceLocked(Device* device) {
if (device->id == mBuiltInKeyboardId) {
ALOGW("built-in keyboard device %s (id=%d) is closing! the apps will not like this",
device->path.string(), mBuiltInKeyboardId);
- mBuiltInKeyboardId = -1;
+ mBuiltInKeyboardId = NO_BUILT_IN_KEYBOARD;
}
- if (epoll_ctl(mEpollFd, EPOLL_CTL_DEL, device->fd, NULL)) {
- ALOGW("Could not remove device fd from epoll instance. errno=%d", errno);
+ if (!device->isVirtual()) {
+ if (epoll_ctl(mEpollFd, EPOLL_CTL_DEL, device->fd, NULL)) {
+ ALOGW("Could not remove device fd from epoll instance. errno=%d", errno);
+ }
}
mDevices.removeItem(device->id);
generated by cgit v1.1 at 2025-11-10 21:13:52 +0000