65xx/libsensors_iio/sensors_mpl.cpp - platform/hardware/invensense - Git at Google

 /*
 * Copyright (C) 2012 Invensense, Inc.
 *
 * 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.
 */

 #define FUNC_LOG LOGV("%s", __PRETTY_FUNCTION__)

 #include <hardware/sensors.h>
 #include <fcntl.h>
 #include <errno.h>
 #include <dirent.h>
 #include <math.h>
 #include <poll.h>
 #include <pthread.h>
 #include <stdlib.h>

 #include <linux/input.h>

 #include <cutils/atomic.h>
 #include <utils/Log.h>

 #include "sensors.h"
 #include "MPLSensor.h"

 /*
  * Vendor-defined Accel Load Calibration File Method
  * @param[out] Accel bias, length 3.  In HW units scaled by 2^16 in body frame
  * @return '0' for a successful load, '1' otherwise
  * example: int AccelLoadConfig(long* offset);
  * End of Vendor-defined Accel Load Cal Method
  */

 /*****************************************************************************/
 /* The SENSORS Module */

 #ifdef ENABLE_DMP_SCREEN_AUTO_ROTATION
 #define LOCAL_SENSORS (MPLSensor::NumSensors + 1)
 #else
 #define LOCAL_SENSORS MPLSensor::NumSensors
 #endif

 static struct sensor_t sSensorList[LOCAL_SENSORS];
 static int sensors = (sizeof(sSensorList) / sizeof(sensor_t));

 static int open_sensors(const struct hw_module_t* module, const char* id,
                         struct hw_device_t** device);

 static int sensors__get_sensors_list(struct sensors_module_t* module,
                                      struct sensor_t const** list)
 {
     *list = sSensorList;
     return sensors;
 }

 static struct hw_module_methods_t sensors_module_methods = {
         open: open_sensors
 };

 struct sensors_module_t HAL_MODULE_INFO_SYM = {
         common: {
                 tag: HARDWARE_MODULE_TAG,
                 version_major: 1,
                 version_minor: 0,
                 id: SENSORS_HARDWARE_MODULE_ID,
                 name: "Invensense module",
                 author: "Invensense Inc.",
                 methods: &sensors_module_methods,
                 dso: NULL,
                 reserved: {0}
         },
         get_sensors_list: sensors__get_sensors_list,
         set_operation_mode: NULL
 };

 struct sensors_poll_context_t {
     sensors_poll_device_1_t device; // must be first

     sensors_poll_context_t();
     ~sensors_poll_context_t();
     int activate(int handle, int enabled);
     int setDelay(int handle, int64_t ns);
     int pollEvents(sensors_event_t* data, int count);
     int query(int what, int *value);
     int batch(int handle, int flags, int64_t period_ns, int64_t timeout);
     int flush(int handle);

 private:
     enum {
         mpl = 0,
         compass,
         dmpOrient,
         dmpSign,
         dmpPed,
         numSensorDrivers,   // wake pipe goes here
         numFds,
     };

     struct pollfd mPollFds[numFds];
     SensorBase *mSensor;
     CompassSensor *mCompassSensor;

     static const size_t wake = numSensorDrivers;
     static const char WAKE_MESSAGE = 'W';
     int mWritePipeFd;
 };

 /******************************************************************************/

 sensors_poll_context_t::sensors_poll_context_t() {
     VFUNC_LOG;

     /* TODO: Handle external pressure sensor */
     mCompassSensor = new CompassSensor();
     MPLSensor *mplSensor = new MPLSensor(mCompassSensor);

    /* For Vendor-defined Accel Calibration File Load
     * Use the Following Constructor and Pass Your Load Cal File Function
     *
     * MPLSensor *mplSensor = new MPLSensor(mCompassSensor, AccelLoadConfig);
     */

     // setup the callback object for handing mpl callbacks
     setCallbackObject(mplSensor);

     // populate the sensor list
     sensors =
             mplSensor->populateSensorList(sSensorList, sizeof(sSensorList));

     mSensor = mplSensor;
     mPollFds[mpl].fd = mSensor->getFd();
     mPollFds[mpl].events = POLLIN;
     mPollFds[mpl].revents = 0;

     mPollFds[compass].fd = mCompassSensor->getFd();
     mPollFds[compass].events = POLLIN;
     mPollFds[compass].revents = 0;

     mPollFds[dmpOrient].fd = ((MPLSensor*) mSensor)->getDmpOrientFd();
     mPollFds[dmpOrient].events = POLLPRI;
     mPollFds[dmpOrient].revents = 0;

     mPollFds[dmpSign].fd = ((MPLSensor*) mSensor)->getDmpSignificantMotionFd();
     mPollFds[dmpSign].events = POLLPRI;
     mPollFds[dmpSign].revents = 0;

     mPollFds[dmpPed].fd = ((MPLSensor*) mSensor)->getDmpPedometerFd();
     mPollFds[dmpPed].events = POLLPRI;
     mPollFds[dmpPed].revents = 0;

     /* Timer based sensor initialization */
     int wakeFds[2];
     int result = pipe(wakeFds);
     LOGE_IF(result<0, "error creating wake pipe (%s)", strerror(errno));
     fcntl(wakeFds[0], F_SETFL, O_NONBLOCK);
     fcntl(wakeFds[1], F_SETFL, O_NONBLOCK);
     mWritePipeFd = wakeFds[1];

     mPollFds[numSensorDrivers].fd = wakeFds[0];
     mPollFds[numSensorDrivers].events = POLLIN;
     mPollFds[numSensorDrivers].revents = 0;
 }

 sensors_poll_context_t::~sensors_poll_context_t() {
     FUNC_LOG;
     delete mSensor;
     delete mCompassSensor;
     for (int i = 0; i < numSensorDrivers; i++) {
         close(mPollFds[i].fd);
     }
     close(mWritePipeFd);
 }

 int sensors_poll_context_t::activate(int handle, int enabled) {
     FUNC_LOG;

     int err;
     err = mSensor->enable(handle, enabled);
     if (!err) {
         const char wakeMessage(WAKE_MESSAGE);
         int result = write(mWritePipeFd, &wakeMessage, 1);
         LOGE_IF(result < 0,
                 "error sending wake message (%s)", strerror(errno));
     }
     return err;
 }

 int sensors_poll_context_t::setDelay(int handle, int64_t ns)
 {
     FUNC_LOG;
     return mSensor->setDelay(handle, ns);
 }

 int sensors_poll_context_t::pollEvents(sensors_event_t *data, int count)
 {
     VHANDLER_LOG;

     int nbEvents = 0;
     int nb, polltime = -1;

     polltime = ((MPLSensor*) mSensor)->getStepCountPollTime();

     // look for new events
     nb = poll(mPollFds, numSensorDrivers, polltime);
     LOGI_IF(0, "poll nb=%d, count=%d, pt=%d", nb, count, polltime);
     if (nb > 0) {
         for (int i = 0; count && i < numSensorDrivers; i++) {
             if (mPollFds[i].revents & (POLLIN | POLLPRI)) {
                 nb = 0;
                 if (i == mpl) {
                     ((MPLSensor*) mSensor)->buildMpuEvent();
                     mPollFds[i].revents = 0;
                 } else if (i == compass) {
                     ((MPLSensor*) mSensor)->buildCompassEvent();
                     mPollFds[i].revents = 0;
                 } else if (i == dmpOrient) {
                     nb = ((MPLSensor*)mSensor)->
                                         readDmpOrientEvents(data, count);
                     mPollFds[dmpOrient].revents= 0;
                     if (isDmpScreenAutoRotationEnabled() && nb > 0) {
                         count -= nb;
                         nbEvents += nb;
                         data += nb;
                     }
                 } else if (i == dmpSign) {
                     LOGI("HAL: dmpSign interrupt");
                     nb = ((MPLSensor*) mSensor)->
                                     readDmpSignificantMotionEvents(data, count);
                     mPollFds[i].revents = 0;
                     count -= nb;
                     nbEvents += nb;
                     data += nb;
                 } else if (i == dmpPed) {
                     LOGI("HAL: dmpPed interrupt");
                     nb = ((MPLSensor*) mSensor)->readDmpPedometerEvents(
                             data, count, ID_P, SENSOR_TYPE_STEP_DETECTOR, 0);
                     mPollFds[i].revents = 0;
                     count -= nb;
                     nbEvents += nb;
                     data += nb;
                 }
                 #if 1
                 if(nb == 0) {
                     nb = ((MPLSensor*) mSensor)->readEvents(data, count);
                     LOGI_IF(0, "sensors_mpl:readEvents() - "
                             "i=%d, nb=%d, count=%d, nbEvents=%d, "
                             "data->timestamp=%lld, data->data[0]=%f,",
                             i, nb, count, nbEvents, data->timestamp,
                             data->data[0]);
                     if (nb > 0) {
                         count -= nb;
                         nbEvents += nb;
                         data += nb;
                     }
                 }
                 #endif
             }
         }

         /* to see if any step counter events */
         if(((MPLSensor*) mSensor)->hasStepCountPendingEvents() == true) {
             nb = 0;
             nb = ((MPLSensor*) mSensor)->readDmpPedometerEvents(
                             data, count, ID_SC, SENSOR_TYPE_STEP_COUNTER, 0);
             LOGI_IF(SensorBase::HANDLER_DATA, "sensors_mpl:readStepCount() - "
                     "nb=%d, count=%d, nbEvents=%d, data->timestamp=%lld, "
                     "data->data[0]=%f,",
                     nb, count, nbEvents, data->timestamp, data->data[0]);
             if (nb > 0) {
                 count -= nb;
                 nbEvents += nb;
                 data += nb;
             }
         }
     } else if(nb == 0) {
         /* to see if any step counter events */
         if(((MPLSensor*) mSensor)->hasStepCountPendingEvents() == true) {
             nb = 0;
             nb = ((MPLSensor*) mSensor)->readDmpPedometerEvents(
                             data, count, ID_SC, SENSOR_TYPE_STEP_COUNTER, 0);
             LOGI_IF(SensorBase::HANDLER_DATA, "sensors_mpl:readStepCount() - "
                     "nb=%d, count=%d, nbEvents=%d, data->timestamp=%lld, "
                     "data->data[0]=%f,",
                     nb, count, nbEvents, data->timestamp, data->data[0]);
             if (nb > 0) {
                 count -= nb;
                 nbEvents += nb;
                 data += nb;
             }
         }

         if (mPollFds[numSensorDrivers].revents & POLLIN) {
             char msg;
             int result = read(mPollFds[numSensorDrivers].fd, &msg, 1);
             LOGE_IF(result < 0,
                     "error reading from wake pipe (%s)", strerror(errno));
             mPollFds[numSensorDrivers].revents = 0;
         }
     }
     return nbEvents;
 }

 int sensors_poll_context_t::query(int what, int* value)
 {
     FUNC_LOG;
     return mSensor->query(what, value);
 }

 int sensors_poll_context_t::batch(int handle, int flags, int64_t period_ns,
                                   int64_t timeout)
 {
     FUNC_LOG;
     return mSensor->batch(handle, flags, period_ns, timeout);
 }

 int sensors_poll_context_t::flush(int handle)
 {
     FUNC_LOG;
     return mSensor->flush(handle);
 }

 /******************************************************************************/

 static int poll__close(struct hw_device_t *dev)
 {
     FUNC_LOG;
     sensors_poll_context_t *ctx = (sensors_poll_context_t *)dev;
     if (ctx) {
         delete ctx;
     }
     return 0;
 }

 static int poll__activate(struct sensors_poll_device_t *dev,
                           int handle, int enabled)
 {
     sensors_poll_context_t *ctx = (sensors_poll_context_t *)dev;
     return ctx->activate(handle, enabled);
 }

 static int poll__setDelay(struct sensors_poll_device_t *dev,
                           int handle, int64_t ns)
 {
     sensors_poll_context_t *ctx = (sensors_poll_context_t *)dev;
     int s= ctx->setDelay(handle, ns);
     return s;
 }

 static int poll__poll(struct sensors_poll_device_t *dev,
                       sensors_event_t* data, int count)
 {
     sensors_poll_context_t *ctx = (sensors_poll_context_t *)dev;
     return ctx->pollEvents(data, count);
 }

 static int poll__batch(struct sensors_poll_device_1 *dev,
                       int handle, int flags, int64_t period_ns, int64_t timeout)
 {
     sensors_poll_context_t *ctx = (sensors_poll_context_t *)dev;
     return ctx->batch(handle, flags, period_ns, timeout);
 }

 static int poll__flush(struct sensors_poll_device_1 *dev,
                       int handle)
 {
     sensors_poll_context_t *ctx = (sensors_poll_context_t *)dev;
     return ctx->flush(handle);
 }
 /******************************************************************************/

 /** Open a new instance of a sensor device using name */
 static int open_sensors(const struct hw_module_t* module, const char* id,
                         struct hw_device_t** device)
 {
     FUNC_LOG;
     int status = -EINVAL;
     sensors_poll_context_t *dev = new sensors_poll_context_t();

     memset(&dev->device, 0, sizeof(sensors_poll_device_1));

     dev->device.common.tag = HARDWARE_DEVICE_TAG;
     dev->device.common.version  = SENSORS_DEVICE_API_VERSION_1_0;
     dev->device.common.module   = const_cast<hw_module_t*>(module);
     dev->device.common.close    = poll__close;
     dev->device.activate        = poll__activate;
     dev->device.setDelay        = poll__setDelay;
     dev->device.poll            = poll__poll;

     /* Batch processing */
     dev->device.batch           = poll__batch;
     dev->device.flush           = poll__flush;

     *device = &dev->device.common;
     status = 0;

     return status;
 }
	/*
	* Copyright (C) 2012 Invensense, Inc.
	*
	* 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.
	*/

	#define FUNC_LOG LOGV("%s", __PRETTY_FUNCTION__)

	#include <hardware/sensors.h>
	#include <fcntl.h>
	#include <errno.h>
	#include <dirent.h>
	#include <math.h>
	#include <poll.h>
	#include <pthread.h>
	#include <stdlib.h>

	#include <linux/input.h>

	#include <cutils/atomic.h>
	#include <utils/Log.h>

	#include "sensors.h"
	#include "MPLSensor.h"

	/*
	* Vendor-defined Accel Load Calibration File Method
	* @param[out] Accel bias, length 3. In HW units scaled by 2^16 in body frame
	* @return '0' for a successful load, '1' otherwise
	* example: int AccelLoadConfig(long* offset);
	* End of Vendor-defined Accel Load Cal Method
	*/

	/*****************************************************************************/
	/* The SENSORS Module */

	#ifdef ENABLE_DMP_SCREEN_AUTO_ROTATION
	#define LOCAL_SENSORS (MPLSensor::NumSensors + 1)
	#else
	#define LOCAL_SENSORS MPLSensor::NumSensors
	#endif

	static struct sensor_t sSensorList[LOCAL_SENSORS];
	static int sensors = (sizeof(sSensorList) / sizeof(sensor_t));

	static int open_sensors(const struct hw_module_t* module, const char* id,
	struct hw_device_t** device);

	static int sensors__get_sensors_list(struct sensors_module_t* module,
	struct sensor_t const** list)
	{
	*list = sSensorList;
	return sensors;
	}

	static struct hw_module_methods_t sensors_module_methods = {
	open: open_sensors
	};

	struct sensors_module_t HAL_MODULE_INFO_SYM = {
	common: {
	tag: HARDWARE_MODULE_TAG,
	version_major: 1,
	version_minor: 0,
	id: SENSORS_HARDWARE_MODULE_ID,
	name: "Invensense module",
	author: "Invensense Inc.",
	methods: &sensors_module_methods,
	dso: NULL,
	reserved: {0}
	},
	get_sensors_list: sensors__get_sensors_list,
	set_operation_mode: NULL
	};

	struct sensors_poll_context_t {
	sensors_poll_device_1_t device; // must be first

	sensors_poll_context_t();
	~sensors_poll_context_t();
	int activate(int handle, int enabled);
	int setDelay(int handle, int64_t ns);
	int pollEvents(sensors_event_t* data, int count);
	int query(int what, int *value);
	int batch(int handle, int flags, int64_t period_ns, int64_t timeout);
	int flush(int handle);

	private:
	enum {
	mpl = 0,
	compass,
	dmpOrient,
	dmpSign,
	dmpPed,
	numSensorDrivers, // wake pipe goes here
	numFds,
	};

	struct pollfd mPollFds[numFds];
	SensorBase *mSensor;
	CompassSensor *mCompassSensor;

	static const size_t wake = numSensorDrivers;
	static const char WAKE_MESSAGE = 'W';
	int mWritePipeFd;
	};

	/******************************************************************************/

	sensors_poll_context_t::sensors_poll_context_t() {
	VFUNC_LOG;

	/* TODO: Handle external pressure sensor */
	mCompassSensor = new CompassSensor();
	MPLSensor *mplSensor = new MPLSensor(mCompassSensor);

	/* For Vendor-defined Accel Calibration File Load
	* Use the Following Constructor and Pass Your Load Cal File Function
	*
	* MPLSensor *mplSensor = new MPLSensor(mCompassSensor, AccelLoadConfig);
	*/

	// setup the callback object for handing mpl callbacks
	setCallbackObject(mplSensor);

	// populate the sensor list
	sensors =
	mplSensor->populateSensorList(sSensorList, sizeof(sSensorList));

	mSensor = mplSensor;
	mPollFds[mpl].fd = mSensor->getFd();
	mPollFds[mpl].events = POLLIN;
	mPollFds[mpl].revents = 0;

	mPollFds[compass].fd = mCompassSensor->getFd();
	mPollFds[compass].events = POLLIN;
	mPollFds[compass].revents = 0;

	mPollFds[dmpOrient].fd = ((MPLSensor*) mSensor)->getDmpOrientFd();
	mPollFds[dmpOrient].events = POLLPRI;
	mPollFds[dmpOrient].revents = 0;

	mPollFds[dmpSign].fd = ((MPLSensor*) mSensor)->getDmpSignificantMotionFd();
	mPollFds[dmpSign].events = POLLPRI;
	mPollFds[dmpSign].revents = 0;

	mPollFds[dmpPed].fd = ((MPLSensor*) mSensor)->getDmpPedometerFd();
	mPollFds[dmpPed].events = POLLPRI;
	mPollFds[dmpPed].revents = 0;

	/* Timer based sensor initialization */
	int wakeFds[2];
	int result = pipe(wakeFds);
	LOGE_IF(result<0, "error creating wake pipe (%s)", strerror(errno));
	fcntl(wakeFds[0], F_SETFL, O_NONBLOCK);
	fcntl(wakeFds[1], F_SETFL, O_NONBLOCK);
	mWritePipeFd = wakeFds[1];

	mPollFds[numSensorDrivers].fd = wakeFds[0];
	mPollFds[numSensorDrivers].events = POLLIN;
	mPollFds[numSensorDrivers].revents = 0;
	}

	sensors_poll_context_t::~sensors_poll_context_t() {
	FUNC_LOG;
	delete mSensor;
	delete mCompassSensor;
	for (int i = 0; i < numSensorDrivers; i++) {
	close(mPollFds[i].fd);
	}
	close(mWritePipeFd);
	}

	int sensors_poll_context_t::activate(int handle, int enabled) {
	FUNC_LOG;

	int err;
	err = mSensor->enable(handle, enabled);
	if (!err) {
	const char wakeMessage(WAKE_MESSAGE);
	int result = write(mWritePipeFd, &wakeMessage, 1);
	LOGE_IF(result < 0,
	"error sending wake message (%s)", strerror(errno));
	}
	return err;
	}

	int sensors_poll_context_t::setDelay(int handle, int64_t ns)
	{
	FUNC_LOG;
	return mSensor->setDelay(handle, ns);
	}

	int sensors_poll_context_t::pollEvents(sensors_event_t *data, int count)
	{
	VHANDLER_LOG;

	int nbEvents = 0;
	int nb, polltime = -1;

	polltime = ((MPLSensor*) mSensor)->getStepCountPollTime();

	// look for new events
	nb = poll(mPollFds, numSensorDrivers, polltime);
	LOGI_IF(0, "poll nb=%d, count=%d, pt=%d", nb, count, polltime);
	if (nb > 0) {
	for (int i = 0; count && i < numSensorDrivers; i++) {
	if (mPollFds[i].revents & (POLLIN \| POLLPRI)) {
	nb = 0;
	if (i == mpl) {
	((MPLSensor*) mSensor)->buildMpuEvent();
	mPollFds[i].revents = 0;
	} else if (i == compass) {
	((MPLSensor*) mSensor)->buildCompassEvent();
	mPollFds[i].revents = 0;
	} else if (i == dmpOrient) {
	nb = ((MPLSensor*)mSensor)->
	readDmpOrientEvents(data, count);
	mPollFds[dmpOrient].revents= 0;
	if (isDmpScreenAutoRotationEnabled() && nb > 0) {
	count -= nb;
	nbEvents += nb;
	data += nb;
	}
	} else if (i == dmpSign) {
	LOGI("HAL: dmpSign interrupt");
	nb = ((MPLSensor*) mSensor)->
	readDmpSignificantMotionEvents(data, count);
	mPollFds[i].revents = 0;
	count -= nb;
	nbEvents += nb;
	data += nb;
	} else if (i == dmpPed) {
	LOGI("HAL: dmpPed interrupt");
	nb = ((MPLSensor*) mSensor)->readDmpPedometerEvents(
	data, count, ID_P, SENSOR_TYPE_STEP_DETECTOR, 0);
	mPollFds[i].revents = 0;
	count -= nb;
	nbEvents += nb;
	data += nb;
	}
	#if 1
	if(nb == 0) {
	nb = ((MPLSensor*) mSensor)->readEvents(data, count);
	LOGI_IF(0, "sensors_mpl:readEvents() - "
	"i=%d, nb=%d, count=%d, nbEvents=%d, "
	"data->timestamp=%lld, data->data[0]=%f,",
	i, nb, count, nbEvents, data->timestamp,
	data->data[0]);
	if (nb > 0) {
	count -= nb;
	nbEvents += nb;
	data += nb;
	}
	}
	#endif
	}
	}

	/* to see if any step counter events */
	if(((MPLSensor*) mSensor)->hasStepCountPendingEvents() == true) {
	nb = 0;
	nb = ((MPLSensor*) mSensor)->readDmpPedometerEvents(
	data, count, ID_SC, SENSOR_TYPE_STEP_COUNTER, 0);
	LOGI_IF(SensorBase::HANDLER_DATA, "sensors_mpl:readStepCount() - "
	"nb=%d, count=%d, nbEvents=%d, data->timestamp=%lld, "
	"data->data[0]=%f,",
	nb, count, nbEvents, data->timestamp, data->data[0]);
	if (nb > 0) {
	count -= nb;
	nbEvents += nb;
	data += nb;
	}
	}
	} else if(nb == 0) {
	/* to see if any step counter events */
	if(((MPLSensor*) mSensor)->hasStepCountPendingEvents() == true) {
	nb = 0;
	nb = ((MPLSensor*) mSensor)->readDmpPedometerEvents(
	data, count, ID_SC, SENSOR_TYPE_STEP_COUNTER, 0);
	LOGI_IF(SensorBase::HANDLER_DATA, "sensors_mpl:readStepCount() - "
	"nb=%d, count=%d, nbEvents=%d, data->timestamp=%lld, "
	"data->data[0]=%f,",
	nb, count, nbEvents, data->timestamp, data->data[0]);
	if (nb > 0) {
	count -= nb;
	nbEvents += nb;
	data += nb;
	}
	}

	if (mPollFds[numSensorDrivers].revents & POLLIN) {
	char msg;
	int result = read(mPollFds[numSensorDrivers].fd, &msg, 1);
	LOGE_IF(result < 0,
	"error reading from wake pipe (%s)", strerror(errno));
	mPollFds[numSensorDrivers].revents = 0;
	}
	}
	return nbEvents;
	}

	int sensors_poll_context_t::query(int what, int* value)
	{
	FUNC_LOG;
	return mSensor->query(what, value);
	}

	int sensors_poll_context_t::batch(int handle, int flags, int64_t period_ns,
	int64_t timeout)
	{
	FUNC_LOG;
	return mSensor->batch(handle, flags, period_ns, timeout);
	}

	int sensors_poll_context_t::flush(int handle)
	{
	FUNC_LOG;
	return mSensor->flush(handle);
	}

	/******************************************************************************/

	static int poll__close(struct hw_device_t *dev)
	{
	FUNC_LOG;
	sensors_poll_context_t ctx = (sensors_poll_context_t )dev;
	if (ctx) {
	delete ctx;
	}
	return 0;
	}

	static int poll__activate(struct sensors_poll_device_t *dev,
	int handle, int enabled)
	{
	sensors_poll_context_t ctx = (sensors_poll_context_t )dev;
	return ctx->activate(handle, enabled);
	}

	static int poll__setDelay(struct sensors_poll_device_t *dev,
	int handle, int64_t ns)
	{
	sensors_poll_context_t ctx = (sensors_poll_context_t )dev;
	int s= ctx->setDelay(handle, ns);
	return s;
	}

	static int poll__poll(struct sensors_poll_device_t *dev,
	sensors_event_t* data, int count)
	{
	sensors_poll_context_t ctx = (sensors_poll_context_t )dev;
	return ctx->pollEvents(data, count);
	}

	static int poll__batch(struct sensors_poll_device_1 *dev,
	int handle, int flags, int64_t period_ns, int64_t timeout)
	{
	sensors_poll_context_t ctx = (sensors_poll_context_t )dev;
	return ctx->batch(handle, flags, period_ns, timeout);
	}

	static int poll__flush(struct sensors_poll_device_1 *dev,
	int handle)
	{
	sensors_poll_context_t ctx = (sensors_poll_context_t )dev;
	return ctx->flush(handle);
	}
	/******************************************************************************/

	/** Open a new instance of a sensor device using name */
	static int open_sensors(const struct hw_module_t* module, const char* id,
	struct hw_device_t** device)
	{
	FUNC_LOG;
	int status = -EINVAL;
	sensors_poll_context_t *dev = new sensors_poll_context_t();

	memset(&dev->device, 0, sizeof(sensors_poll_device_1));

	dev->device.common.tag = HARDWARE_DEVICE_TAG;
	dev->device.common.version = SENSORS_DEVICE_API_VERSION_1_0;
	dev->device.common.module = const_cast<hw_module_t*>(module);
	dev->device.common.close = poll__close;
	dev->device.activate = poll__activate;
	dev->device.setDelay = poll__setDelay;
	dev->device.poll = poll__poll;

	/* Batch processing */
	dev->device.batch = poll__batch;
	dev->device.flush = poll__flush;

	*device = &dev->device.common;
	status = 0;

	return status;
	}