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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 bma150.c
* @brief Accelerometer setup and handling methods.
*/
/* ------------------ */
/* - Include Files. - */
/* ------------------ */
#ifdef __KERNEL__
#include <linux/module.h>
#endif
#include "mpu.h"
#include "mlos.h"
#include "mlsl.h"
/* --------------------- */
/* - Variables. - */
/* --------------------- */
/*********************************************
Accelerometer Initialization Functions
**********************************************/
static int bma150_suspend(void *mlsl_handle,
struct ext_slave_descr *slave,
struct ext_slave_platform_data *pdata)
{
int result;
result =
MLSLSerialWriteSingle(mlsl_handle, pdata->address, 0x0a, 0x01);
MLOSSleep(3); /* 3 ms powerup time maximum */
ERROR_CHECK(result);
return result;
}
/* full scale setting - register and mask */
#define ACCEL_BOSCH_CTRL_REG (0x14)
#define ACCEL_BOSCH_CTRL_MASK (0x18)
static int bma150_resume(void *mlsl_handle,
struct ext_slave_descr *slave,
struct ext_slave_platform_data *pdata)
{
int result;
unsigned char reg = 0;
/* Soft reset */
result =
MLSLSerialWriteSingle(mlsl_handle, pdata->address, 0x0a, 0x02);
ERROR_CHECK(result);
MLOSSleep(3);
result =
MLSLSerialRead(mlsl_handle, pdata->address, 0x14, 1, ®);
ERROR_CHECK(result);
/* Bandwidth */
reg &= 0xc0;
reg |= 3; /* 3=190 Hz */
/* Full Scale */
reg &= ~ACCEL_BOSCH_CTRL_MASK;
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;
result =
MLSLSerialWriteSingle(mlsl_handle, pdata->address, 0x14, reg);
ERROR_CHECK(result);
return result;
}
static int bma150_read(void *mlsl_handle,
struct ext_slave_descr *slave,
struct ext_slave_platform_data *pdata,
unsigned char *data)
{
int result;
result = MLSLSerialRead(mlsl_handle, pdata->address,
slave->reg, slave->len, data);
return result;
}
static struct ext_slave_descr bma150_descr = {
/*.init = */ NULL,
/*.exit = */ NULL,
/*.suspend = */ bma150_suspend,
/*.resume = */ bma150_resume,
/*.read = */ bma150_read,
/*.config = */ NULL,
/*.get_config = */ NULL,
/*.name = */ "bma150",
/*.type = */ EXT_SLAVE_TYPE_ACCELEROMETER,
/*.id = */ ACCEL_ID_BMA150,
/*.reg = */ 0x02,
/*.len = */ 6,
/*.endian = */ EXT_SLAVE_LITTLE_ENDIAN,
/*.range = */ {2, 0},
};
struct ext_slave_descr *bma150_get_slave_descr(void)
{
return &bma150_descr;
}
EXPORT_SYMBOL(bma150_get_slave_descr);
#ifdef __KERNEL__
MODULE_AUTHOR("Invensense");
MODULE_DESCRIPTION("User space IRQ handler for MPU3xxx devices");
MODULE_LICENSE("GPL");
MODULE_ALIAS("bma");
#endif
/**
* @}
*/
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