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/*
$License:
Copyright (C) 2010 InvenSense Corporation, All Rights Reserved.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
$
*/
/**
* @brief Provides the interface to setup and handle a compass
* connected to the primary I2C interface of the gyroscope.
*
* @{
* @file hscdtd004a.c
* @brief Magnetometer setup and handling methods for Alps hscdtd004a
* compass.
*/
/* ------------------ */
/* - Include Files. - */
/* ------------------ */
#ifdef __KERNEL__
#include <linux/module.h>
#endif
#include "mpu.h"
#include "mlsl.h"
#include "mlos.h"
#include <log.h>
#undef MPL_LOG_TAG
#define MPL_LOG_TAG "MPL-compass"
/*----- ALPS HSCDTD004A Registers ------*/
#define COMPASS_HSCDTD004A_STAT (0x18)
#define COMPASS_HSCDTD004A_CTRL1 (0x1B)
#define COMPASS_HSCDTD004A_CTRL2 (0x1C)
#define COMPASS_HSCDTD004A_CTRL3 (0x1D)
#define COMPASS_HSCDTD004A_DATAX (0x10)
/* --------------------- */
/* - Variables. - */
/* --------------------- */
/*****************************************
Compass Initialization Functions
*****************************************/
int hscdtd004a_suspend(void *mlsl_handle,
struct ext_slave_descr *slave,
struct ext_slave_platform_data *pdata)
{
int result = ML_SUCCESS;
/* Power mode: stand-by */
result =
MLSLSerialWriteSingle(mlsl_handle, pdata->address,
COMPASS_HSCDTD004A_CTRL1, 0x00);
ERROR_CHECK(result);
MLOSSleep(1); /* turn-off time */
return result;
}
int hscdtd004a_resume(void *mlsl_handle,
struct ext_slave_descr *slave,
struct ext_slave_platform_data *pdata)
{
int result = ML_SUCCESS;
/* Soft reset */
result =
MLSLSerialWriteSingle(mlsl_handle, pdata->address,
COMPASS_HSCDTD004A_CTRL3, 0x80);
ERROR_CHECK(result);
/* Normal state; Power mode: active */
result =
MLSLSerialWriteSingle(mlsl_handle, pdata->address,
COMPASS_HSCDTD004A_CTRL1, 0x82);
ERROR_CHECK(result);
/* Data ready enable */
result =
MLSLSerialWriteSingle(mlsl_handle, pdata->address,
COMPASS_HSCDTD004A_CTRL2, 0x7C);
ERROR_CHECK(result);
MLOSSleep(1); /* turn-on time */
return result;
}
int hscdtd004a_read(void *mlsl_handle,
struct ext_slave_descr *slave,
struct ext_slave_platform_data *pdata,
unsigned char *data)
{
unsigned char stat;
tMLError result = ML_SUCCESS;
int status = ML_SUCCESS;
/* Read status reg. to check if data is ready */
result =
MLSLSerialRead(mlsl_handle, pdata->address,
COMPASS_HSCDTD004A_STAT, 1, &stat);
ERROR_CHECK(result);
if (stat & 0x48) {
result =
MLSLSerialRead(mlsl_handle, pdata->address,
COMPASS_HSCDTD004A_DATAX, 6,
(unsigned char *) data);
ERROR_CHECK(result);
status = ML_SUCCESS;
} else if (stat & 0x68) {
status = ML_ERROR_COMPASS_DATA_OVERFLOW;
} else {
status = ML_ERROR_COMPASS_DATA_NOT_READY;
}
/* trigger next measurement read */
result =
MLSLSerialWriteSingle(mlsl_handle, pdata->address,
COMPASS_HSCDTD004A_CTRL3, 0x40);
ERROR_CHECK(result);
return status;
}
struct ext_slave_descr hscdtd004a_descr = {
/*.init = */ NULL,
/*.exit = */ NULL,
/*.suspend = */ hscdtd004a_suspend,
/*.resume = */ hscdtd004a_resume,
/*.read = */ hscdtd004a_read,
/*.config = */ NULL,
/*.get_config = */ NULL,
/*.name = */ "hscdtd004a",
/*.type = */ EXT_SLAVE_TYPE_COMPASS,
/*.id = */ COMPASS_ID_HSCDTD004A,
/*.reg = */ 0x10,
/*.len = */ 6,
/*.endian = */ EXT_SLAVE_LITTLE_ENDIAN,
/*.range = */ {9830, 4000},
};
struct ext_slave_descr *hscdtd004a_get_slave_descr(void)
{
return &hscdtd004a_descr;
}
EXPORT_SYMBOL(hscdtd004a_get_slave_descr);
/**
* @}
**/
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