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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/>.
$
*/
/**
* @defgroup COMPASSDL (Motion Library - Accelerometer Driver Layer)
* @brief Provides the interface to setup and handle an accelerometers
* connected to the secondary I2C interface of the gyroscope.
*
* @{
* @file ami304.c
* @brief Magnetometer setup and handling methods for Aichi ami304 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"
#define AMI304_REG_DATAX (0x10)
#define AMI304_REG_STAT1 (0x18)
#define AMI304_REG_CNTL1 (0x1B)
#define AMI304_REG_CNTL2 (0x1C)
#define AMI304_REG_CNTL3 (0x1D)
#define AMI304_BIT_CNTL1_PC1 (0x80)
#define AMI304_BIT_CNTL1_ODR1 (0x10)
#define AMI304_BIT_CNTL1_FS1 (0x02)
#define AMI304_BIT_CNTL2_IEN (0x10)
#define AMI304_BIT_CNTL2_DREN (0x08)
#define AMI304_BIT_CNTL2_DRP (0x04)
#define AMI304_BIT_CNTL3_F0RCE (0x40)
int ami304_suspend(void *mlsl_handle,
struct ext_slave_descr *slave,
struct ext_slave_platform_data *pdata)
{
int result;
unsigned char reg;
result =
MLSLSerialRead(mlsl_handle, pdata->address, AMI304_REG_CNTL1,
1, ®);
ERROR_CHECK(result);
reg &= ~(AMI304_BIT_CNTL1_PC1|AMI304_BIT_CNTL1_FS1);
result =
MLSLSerialWriteSingle(mlsl_handle, pdata->address,
AMI304_REG_CNTL1, reg);
ERROR_CHECK(result);
return result;
}
int ami304_resume(void *mlsl_handle,
struct ext_slave_descr *slave,
struct ext_slave_platform_data *pdata)
{
int result = ML_SUCCESS;
/* Set CNTL1 reg to power model active */
result =
MLSLSerialWriteSingle(mlsl_handle, pdata->address,
AMI304_REG_CNTL1,
AMI304_BIT_CNTL1_PC1|AMI304_BIT_CNTL1_FS1);
ERROR_CHECK(result);
/* Set CNTL2 reg to DRDY active high and enabled */
result =
MLSLSerialWriteSingle(mlsl_handle, pdata->address,
AMI304_REG_CNTL2,
AMI304_BIT_CNTL2_DREN |
AMI304_BIT_CNTL2_DRP);
ERROR_CHECK(result);
/* Set CNTL3 reg to forced measurement period */
result =
MLSLSerialWriteSingle(mlsl_handle, pdata->address,
AMI304_REG_CNTL3, AMI304_BIT_CNTL3_F0RCE);
return result;
}
int ami304_read(void *mlsl_handle,
struct ext_slave_descr *slave,
struct ext_slave_platform_data *pdata, unsigned char *data)
{
unsigned char stat;
int result = ML_SUCCESS;
/* Read status reg and check if data ready (DRDY) */
result =
MLSLSerialRead(mlsl_handle, pdata->address, AMI304_REG_STAT1,
1, &stat);
ERROR_CHECK(result);
if (stat & 0x40) {
result =
MLSLSerialRead(mlsl_handle, pdata->address,
AMI304_REG_DATAX, 6,
(unsigned char *) data);
ERROR_CHECK(result);
/* start another measurement */
result =
MLSLSerialWriteSingle(mlsl_handle, pdata->address,
AMI304_REG_CNTL3,
AMI304_BIT_CNTL3_F0RCE);
ERROR_CHECK(result);
return ML_SUCCESS;
}
return ML_ERROR_COMPASS_DATA_NOT_READY;
}
struct ext_slave_descr ami304_descr = {
/*.suspend = */ ami304_suspend,
/*.resume = */ ami304_resume,
/*.read = */ ami304_read,
/*.name = */ "ami304",
/*.type = */ EXT_SLAVE_TYPE_COMPASS,
/*.id = */ COMPASS_ID_AICHI,
/*.reg = */ 0x06,
/*.len = */ 6,
/*.endian = */ EXT_SLAVE_LITTLE_ENDIAN,
/*.range = */ {5461, 3333}
};
struct ext_slave_descr *ami304_get_slave_descr(void)
{
return &ami304_descr;
}
#ifdef __KERNEL__
EXPORT_SYMBOL(ami304_get_slave_descr);
#endif
/**
* @}
**/
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