/*
* Copyright (C) 2011 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.
*/
#define LOG_NDEBUG 0
#define LOG_TAG "Sensors"
//#define FUNC_LOG LOGV("%s", __PRETTY_FUNCTION__)
#define FUNC_LOG
#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 <utils/Atomic.h>
#include <utils/Log.h>
#include "sensors.h"
#include "MPLSensor.h"
#include "LightSensor.h"
#include "ProximitySensor.h"
#include "PressureSensor.h"
/*****************************************************************************/
#define DELAY_OUT_TIME 0x7FFFFFFF
#define LIGHT_SENSOR_POLLTIME 2000000000
#define SENSORS_ROTATION_VECTOR (1<<ID_RV)
#define SENSORS_LINEAR_ACCEL (1<<ID_LA)
#define SENSORS_GRAVITY (1<<ID_GR)
#define SENSORS_GYROSCOPE (1<<ID_GY)
#define SENSORS_ACCELERATION (1<<ID_A)
#define SENSORS_MAGNETIC_FIELD (1<<ID_M)
#define SENSORS_ORIENTATION (1<<ID_O)
#define SENSORS_LIGHT (1<<ID_L)
#define SENSORS_PROXIMITY (1<<ID_P)
#define SENSORS_PRESSURE (1<<ID_PR)
#define SENSORS_ROTATION_VECTOR_HANDLE (ID_RV)
#define SENSORS_LINEAR_ACCEL_HANDLE (ID_LA)
#define SENSORS_GRAVITY_HANDLE (ID_GR)
#define SENSORS_GYROSCOPE_HANDLE (ID_GY)
#define SENSORS_ACCELERATION_HANDLE (ID_A)
#define SENSORS_MAGNETIC_FIELD_HANDLE (ID_M)
#define SENSORS_ORIENTATION_HANDLE (ID_O)
#define SENSORS_LIGHT_HANDLE (ID_L)
#define SENSORS_PROXIMITY_HANDLE (ID_P)
#define SENSORS_PRESSURE_HANDLE (ID_PR)
#define AKM_FTRACE 0
#define AKM_DEBUG 0
#define AKM_DATA 0
/*****************************************************************************/
/* The SENSORS Module */
#define LOCAL_SENSORS (3)
static struct sensor_t sSensorList[LOCAL_SENSORS + MPLSensor::numSensors] = {
{ "GP2A Light sensor",
"Sharp",
1, SENSORS_LIGHT_HANDLE,
SENSOR_TYPE_LIGHT, 3000.0f, 1.0f, 0.75f, 0, { } },
{ "GP2A Proximity sensor",
"Sharp",
1, SENSORS_PROXIMITY_HANDLE,
SENSOR_TYPE_PROXIMITY, 5.0f, 5.0f, 0.75f, 0, { } },
{ "BMP180 Pressure sensor",
"Bosch",
1, SENSORS_PRESSURE_HANDLE,
SENSOR_TYPE_PRESSURE, 1100.0f, 0.01f, 0.67f, 20000, { } },
};
static int numSensors = LOCAL_SENSORS;
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 numSensors;
}
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: "Samsung Sensor module",
author: "Samsung Electronic Company",
methods: &sensors_module_methods,
dso: 0,
reserved: {},
},
get_sensors_list: sensors__get_sensors_list,
};
struct sensors_poll_context_t {
struct sensors_poll_device_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);
private:
enum {
mpl = 0, //all mpl entries must be consecutive and in this order
mpl_accel,
mpl_timer,
light,
proximity,
pressure,
numSensorDrivers, // wake pipe goes here
mpl_power, //special handle for MPL pm interaction
numFds,
};
static const size_t wake = numFds - 2;
static const char WAKE_MESSAGE = 'W';
struct pollfd mPollFds[numFds];
int mWritePipeFd;
SensorBase* mSensors[numSensorDrivers];
int handleToDriver(int handle) const {
switch (handle) {
case ID_RV:
case ID_LA:
case ID_GR:
case ID_GY:
case ID_A:
case ID_M:
case ID_O:
return mpl;
case ID_L:
return light;
case ID_P:
return proximity;
case ID_PR:
return pressure;
}
return -EINVAL;
}
};
/*****************************************************************************/
sensors_poll_context_t::sensors_poll_context_t()
{
FUNC_LOG;
MPLSensor* p_mplsen = new MPLSensor();
setCallbackObject(p_mplsen); //setup the callback object for handing mpl callbacks
numSensors =
LOCAL_SENSORS +
p_mplsen->populateSensorList(sSensorList + LOCAL_SENSORS,
sizeof(sSensorList[0]) * (ARRAY_SIZE(sSensorList) - LOCAL_SENSORS));
mSensors[mpl] = p_mplsen;
mPollFds[mpl].fd = mSensors[mpl]->getFd();
mPollFds[mpl].events = POLLIN;
mPollFds[mpl].revents = 0;
mSensors[mpl_accel] = mSensors[mpl];
mPollFds[mpl_accel].fd = ((MPLSensor*)mSensors[mpl])->getAccelFd();
mPollFds[mpl_accel].events = POLLIN;
mPollFds[mpl_accel].revents = 0;
mSensors[mpl_timer] = mSensors[mpl];
mPollFds[mpl_timer].fd = ((MPLSensor*)mSensors[mpl])->getTimerFd();
mPollFds[mpl_timer].events = POLLIN;
mPollFds[mpl_timer].revents = 0;
mSensors[light] = new LightSensor();
mPollFds[light].fd = mSensors[light]->getFd();
mPollFds[light].events = POLLIN;
mPollFds[light].revents = 0;
mSensors[proximity] = new ProximitySensor();
mPollFds[proximity].fd = mSensors[proximity]->getFd();
mPollFds[proximity].events = POLLIN;
mPollFds[proximity].revents = 0;
mSensors[pressure] = new PressureSensor();
mPollFds[pressure].fd = mSensors[pressure]->getFd();
mPollFds[pressure].events = POLLIN;
mPollFds[pressure].revents = 0;
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[wake].fd = wakeFds[0];
mPollFds[wake].events = POLLIN;
mPollFds[wake].revents = 0;
//setup MPL pm interaction handle
mPollFds[mpl_power].fd = ((MPLSensor*)mSensors[mpl])->getPowerFd();
mPollFds[mpl_power].events = POLLIN;
mPollFds[mpl_power].revents = 0;
}
sensors_poll_context_t::~sensors_poll_context_t()
{
FUNC_LOG;
for (int i=0 ; i<numSensorDrivers ; i++) {
delete mSensors[i];
}
close(mPollFds[wake].fd);
close(mWritePipeFd);
}
int sensors_poll_context_t::activate(int handle, int enabled)
{
FUNC_LOG;
int index = handleToDriver(handle);
if (index < 0) return index;
int err = mSensors[index]->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;
int index = handleToDriver(handle);
if (index < 0) return index;
return mSensors[index]->setDelay(handle, ns);
}
int sensors_poll_context_t::pollEvents(sensors_event_t* data, int count)
{
//FUNC_LOG;
int nbEvents = 0;
int n = 0;
int polltime = -1;
do {
// see if we have some leftover from the last poll()
for (int i=0 ; count && i<numSensorDrivers ; i++) {
SensorBase* const sensor(mSensors[i]);
if ((mPollFds[i].revents & POLLIN) || (sensor->hasPendingEvents())) {
int nb = sensor->readEvents(data, count);
if (nb < count) {
// no more data for this sensor
mPollFds[i].revents = 0;
}
count -= nb;
nbEvents += nb;
data += nb;
//special handling for the mpl, which has multiple handles
if(i==mpl) {
i+=2; //skip accel and timer
mPollFds[mpl_accel].revents = 0;
mPollFds[mpl_timer].revents = 0;
}
if(i==mpl_accel) {
i+=1; //skip timer
mPollFds[mpl_timer].revents = 0;
}
}
}
if (count) {
// we still have some room, so try to see if we can get
// some events immediately or just wait if we don't have
// anything to return
int i;
do {
n = poll(mPollFds, numFds, nbEvents ? 0 : polltime);
} while (n < 0 && errno == EINTR);
if (n<0) {
LOGE("poll() failed (%s)", strerror(errno));
return -errno;
}
if (mPollFds[wake].revents & POLLIN) {
char msg;
int result = read(mPollFds[wake].fd, &msg, 1);
LOGE_IF(result<0, "error reading from wake pipe (%s)", strerror(errno));
LOGE_IF(msg != WAKE_MESSAGE, "unknown message on wake queue (0x%02x)", int(msg));
mPollFds[wake].revents = 0;
}
if(mPollFds[mpl_power].revents & POLLIN) {
((MPLSensor*)mSensors[mpl])->handlePowerEvent();
mPollFds[mpl_power].revents = 0;
}
}
// if we have events and space, go read them
} while (n && count);
return nbEvents;
}
/*****************************************************************************/
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)
{
FUNC_LOG;
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)
{
FUNC_LOG;
sensors_poll_context_t *ctx = (sensors_poll_context_t *)dev;
return ctx->setDelay(handle, ns);
}
static int poll__poll(struct sensors_poll_device_t *dev,
sensors_event_t* data, int count)
{
FUNC_LOG;
sensors_poll_context_t *ctx = (sensors_poll_context_t *)dev;
return ctx->pollEvents(data, count);
}
/*****************************************************************************/
/** 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_t));
dev->device.common.tag = HARDWARE_DEVICE_TAG;
dev->device.common.version = 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;
*device = &dev->device.common;
status = 0;
return status;
}