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/*
* Copyright (C) 2014 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
#include <fcntl.h>
#include <errno.h>
#include <math.h>
#include <unistd.h>
#include <dirent.h>
#include <sys/select.h>
#include <cutils/log.h>
#include <linux/input.h>
#include <string.h>
#include "PressureSensor.IIO.secondary.h"
#include "sensors.h"
#include "MPLSupport.h"
#include "sensor_params.h"
#include "ml_sysfs_helper.h"
#pragma message("HAL:build pressure sensor on Invensense MPU secondary bus")
/* dynamically get this when driver supports it */
#define CHIP_ID "BMP280"
//#define TIMER (1)
#define DEFAULT_POLL_TIME 300
#define PRESSURE_MAX_SYSFS_ATTRB sizeof(pressureSysFs) / sizeof(char*)
static int s_poll_time = -1;
static int min_poll_time = 50;
static struct timespec t_pre;
/*****************************************************************************/
PressureSensor::PressureSensor(const char *sysfs_path)
: SensorBase(NULL, NULL),
pressure_fd(-1)
{
VFUNC_LOG;
mSysfsPath = sysfs_path;
LOGV_IF(ENG_VERBOSE, "pressuresensor path: %s", mSysfsPath);
if(inv_init_sysfs_attributes()) {
LOGE("Error Instantiating Pressure Sensor\n");
return;
} else {
LOGI_IF(PROCESS_VERBOSE, "HAL:Secondary Chip Id: %s", CHIP_ID);
}
}
PressureSensor::~PressureSensor()
{
VFUNC_LOG;
if( pressure_fd > 0)
close(pressure_fd);
}
int PressureSensor::getFd() const
{
VHANDLER_LOG;
return pressure_fd;
}
/**
* @brief This function will enable/disable sensor.
* @param[in] handle
* which sensor to enable/disable.
* @param[in] en
* en=1, enable;
* en=0, disable
* @return if the operation is successful.
*/
int PressureSensor::enable(int32_t handle, int en)
{
VFUNC_LOG;
int res = 0;
LOGV_IF(SYSFS_VERBOSE, "HAL:sysfs:echo %d > %s (%lld)",
en, pressureSysFs.pressure_enable, getTimestamp());
res = write_sysfs_int(pressureSysFs.pressure_enable, en);
return res;
}
int PressureSensor::setDelay(int32_t handle, int64_t ns)
{
VFUNC_LOG;
int res = 0;
mDelay = int(1000000000.f / ns);
LOGV_IF(SYSFS_VERBOSE, "HAL:sysfs:echo %lld > %s (%lld)",
mDelay, pressureSysFs.pressure_rate, getTimestamp());
res = write_sysfs_int(pressureSysFs.pressure_rate, mDelay);
#ifdef TIMER
int t_poll_time = (int)(ns / 1000000LL);
if (t_poll_time > min_poll_time) {
s_poll_time = t_poll_time;
} else {
s_poll_time = min_poll_time;
}
LOGV_IF(PROCESS_VERBOSE,
"HAL:setDelay : %llu ns, (%.2f Hz)", ns, 1000000000.f/ns);
#endif
return res;
}
/**
@brief This function will return the state of the sensor.
@return 1=enabled; 0=disabled
**/
int PressureSensor::getEnable(int32_t handle)
{
VFUNC_LOG;
return mEnable;
}
/**
* @brief This function will return the current delay for this sensor.
* @return delay in nanoseconds.
*/
int64_t PressureSensor::getDelay(int32_t handle)
{
VFUNC_LOG;
#ifdef TIMER
if (mEnable) {
return s_poll_time;
} else {
return -1;
}
#endif
return mDelay;
}
void PressureSensor::fillList(struct sensor_t *list)
{
VFUNC_LOG;
const char *pressure = "BMP280";
if (pressure) {
if(!strcmp(pressure, "BMP280")) {
list->maxRange = PRESSURE_BMP280_RANGE;
list->resolution = PRESSURE_BMP280_RESOLUTION;
list->power = PRESSURE_BMP280_POWER;
list->minDelay = PRESSURE_BMP280_MINDELAY;
mMinDelay = list->minDelay;
return;
}
}
LOGE("HAL:unknown pressure id %s -- "
"params default to bmp280 and might be wrong.",
pressure);
list->maxRange = PRESSURE_BMP280_RANGE;
list->resolution = PRESSURE_BMP280_RESOLUTION;
list->power = PRESSURE_BMP280_POWER;
list->minDelay = PRESSURE_BMP280_MINDELAY;
mMinDelay = list->minDelay;
return;
}
int PressureSensor::inv_init_sysfs_attributes(void)
{
VFUNC_LOG;
pathP = (char*)malloc(sizeof(char[PRESSURE_MAX_SYSFS_ATTRB][MAX_SYSFS_NAME_LEN]));
char *sptr = pathP;
char **dptr = (char**)&pressureSysFs;
if (sptr == NULL)
return -1;
unsigned char i = 0;
do {
*dptr++ = sptr;
memset(sptr, 0, sizeof(sptr));
sptr += sizeof(char[MAX_SYSFS_NAME_LEN]);
} while (++i < PRESSURE_MAX_SYSFS_ATTRB);
sprintf(pressureSysFs.pressure_enable, "%s%s", mSysfsPath, "/pressure_enable");
sprintf(pressureSysFs.pressure_rate, "%s%s", mSysfsPath, "/pressure_rate");
return 0;
}
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