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/*
* Copyright (C) 2011 Samsung
*
* 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.
*/
#include <fcntl.h>
#include <errno.h>
#include <math.h>
#include <poll.h>
#include <fcntl.h>
#include <unistd.h>
#include <dirent.h>
#include <sys/select.h>
#include <cutils/log.h>
#include <pthread.h>
#include "SamsungSensorBase.h"
char *SamsungSensorBase::makeSysfsName(const char *input_name,
const char *file_name) {
char *name;
int length = strlen("/sys/class/input/") +
strlen(input_name) +
strlen("/device/") +
strlen(file_name);
name = new char[length + 1];
if (name) {
strcpy(name, "/sys/class/input/");
strcat(name, input_name);
strcat(name, "/device/");
strcat(name, file_name);
}
return name;
}
bool SamsungSensorBase::handleEvent(input_event const * event) {
return true;
}
int SamsungSensorBase::handleEnable(int en) {
return 0;
}
SamsungSensorBase::SamsungSensorBase(const char *dev_name,
const char *data_name,
int sensor_code)
: SensorBase(dev_name, data_name),
mEnabled(true),
mHasPendingEvent(false),
mInputReader(4),
mSensorCode(sensor_code),
mLock(PTHREAD_MUTEX_INITIALIZER)
{
mPendingEvent.version = sizeof(sensors_event_t);
memset(mPendingEvent.data, 0, sizeof(mPendingEvent.data));
if (!data_fd)
return;
mInputSysfsEnable = makeSysfsName(input_name, "enable");
if (!mInputSysfsEnable) {
ALOGE("%s: unable to allocate mem for %s:enable", __func__,
data_name);
return;
}
mInputSysfsPollDelay = makeSysfsName(input_name, "poll_delay");
if (!mInputSysfsPollDelay) {
ALOGE("%s: unable to allocate mem for %s:poll_delay", __func__,
data_name);
return;
}
int flags = fcntl(data_fd, F_GETFL, 0);
fcntl(data_fd, F_SETFL, flags | O_NONBLOCK);
enable(0, 0);
}
SamsungSensorBase::~SamsungSensorBase() {
if (mEnabled) {
enable(0, 0);
}
delete[] mInputSysfsEnable;
delete[] mInputSysfsPollDelay;
}
int SamsungSensorBase::enable(int32_t handle, int en)
{
int err = 0;
pthread_mutex_lock(&mLock);
if (en != mEnabled) {
int fd;
fd = open(mInputSysfsEnable, O_RDWR);
if (fd >= 0) {
err = write(fd, en ? "1" : "0", 2);
close(fd);
if (err < 0) {
goto cleanup;
}
mEnabled = en;
err = handleEnable(en);
} else {
err = -1;
}
}
cleanup:
pthread_mutex_unlock(&mLock);
return err;
}
int SamsungSensorBase::setDelay(int32_t handle, int64_t ns)
{
int fd;
int result = 0;
char buf[21];
pthread_mutex_lock(&mLock);
fd = open(mInputSysfsPollDelay, O_RDWR);
if (fd < 0) {
result = -1;
goto done;
}
sprintf(buf, "%lld", ns);
write(fd, buf, strlen(buf)+1);
close(fd);
done:
pthread_mutex_unlock(&mLock);
return result;
}
int SamsungSensorBase::readEvents(sensors_event_t* data, int count)
{
if (count < 1)
return -EINVAL;
pthread_mutex_lock(&mLock);
int numEventReceived = 0;
if (mHasPendingEvent) {
mHasPendingEvent = false;
if (mEnabled) {
mPendingEvent.timestamp = getTimestamp();
*data = mPendingEvent;
numEventReceived++;
}
goto done;
}
input_event const* event;
while (count && mInputReader.readEvent(data_fd, &event)) {
if (event->type == EV_ABS) {
if (event->code == mSensorCode) {
if (mEnabled && handleEvent(event)) {
mPendingEvent.timestamp = timevalToNano(event->time);
*data++ = mPendingEvent;
count--;
numEventReceived++;
}
}
}
mInputReader.next();
}
done:
pthread_mutex_unlock(&mLock);
return numEventReceived;
}
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