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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 ACCELDL (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 kxtf9.c
* @brief Accelerometer setup and handling methods.
*/
/* ------------------ */
/* - 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-acc"
/* --------------------- */
/* - Variables. - */
/* --------------------- */
/*****************************************
Accelerometer Initialization Functions
*****************************************/
static int kxtf9_suspend(void *mlsl_handle,
struct ext_slave_descr *slave,
struct ext_slave_platform_data *pdata)
{
int result;
result =
MLSLSerialWriteSingle(mlsl_handle, pdata->address, 0x1b, 0);
ERROR_CHECK(result);
return result;
}
/* full scale setting - register and mask */
#define ACCEL_KIONIX_CTRL_REG (0x1b)
#define ACCEL_KIONIX_CTRL_MASK (0x18)
static int kxtf9_resume(void *mlsl_handle,
struct ext_slave_descr *slave,
struct ext_slave_platform_data *pdata)
{
int result = ML_SUCCESS;
unsigned char reg;
/* RAM reset */
result =
MLSLSerialWriteSingle(mlsl_handle, pdata->address, 0x1d, 0xcd);
ERROR_CHECK(result);
MLOSSleep(10);
/* Wake up */
result =
MLSLSerialWriteSingle(mlsl_handle, pdata->address, 0x1b, 0x42);
ERROR_CHECK(result);
/* INT_CTRL_REG1: */
result =
MLSLSerialWriteSingle(mlsl_handle, pdata->address, 0x1e, 0x14);
ERROR_CHECK(result);
/* WUF_THRESH: */
result =
MLSLSerialWriteSingle(mlsl_handle, pdata->address, 0x5a, 0x00);
ERROR_CHECK(result);
/* DATA_CTRL_REG */
result =
MLSLSerialWriteSingle(mlsl_handle, pdata->address, 0x21, 0x04);
ERROR_CHECK(result);
/* WUF_TIMER */
result =
MLSLSerialWriteSingle(mlsl_handle, pdata->address, 0x29, 0x02);
ERROR_CHECK(result);
/* Full Scale */
reg = 0xc2;
reg &= ~ACCEL_KIONIX_CTRL_MASK;
reg |= 0x00;
if (slave->range.mantissa == 4)
reg |= 0x08;
else if (slave->range.mantissa == 8)
reg |= 0x10;
else {
slave->range.mantissa = 2;
reg |= 0x00;
}
slave->range.fraction = 0;
/* Normal operation */
result =
MLSLSerialWriteSingle(mlsl_handle, pdata->address, 0x1b, reg);
ERROR_CHECK(result);
MLOSSleep(50);
return ML_SUCCESS;
}
static int kxtf9_read(void *mlsl_handle,
struct ext_slave_descr *slave,
struct ext_slave_platform_data *pdata,
unsigned char *data)
{
return ML_ERROR_FEATURE_NOT_IMPLEMENTED;
}
static struct ext_slave_descr kxtf9_descr = {
/*.init = */ NULL,
/*.exit = */ NULL,
/*.suspend = */ kxtf9_suspend,
/*.resume = */ kxtf9_resume,
/*.read = */ kxtf9_read,
/*.config = */ NULL,
/*.name = */ "kxtf9",
/*.type = */ EXT_SLAVE_TYPE_ACCELEROMETER,
/*.id = */ ACCEL_ID_KXTF9,
/*.reg = */ 0x06,
/*.len = */ 6,
/*.endian = */ EXT_SLAVE_LITTLE_ENDIAN,
/*.range = */ {2, 0},
};
struct ext_slave_descr *kxtf9_get_slave_descr(void)
{
return &kxtf9_descr;
}
EXPORT_SYMBOL(kxtf9_get_slave_descr);
/**
* @}
**/
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