/*
$License:
Copyright (C) 2011 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 .
$
*/
/**
* @addtogroup ACCELDL
* @brief Provides the interface to setup and handle an accelerometer.
*
* @{
* @file lsm303dlx_a.c
* @brief Accelerometer setup and handling methods for ST LSM303DLH
* or LSM303DLM accel.
*/
/* -------------------------------------------------------------------------- */
#include
#include
#include
#include
#include
#include
#include
#include "mpu-dev.h"
#include
#include
#include "mlsl.h"
#include "mldl_cfg.h"
#undef MPL_LOG_TAG
#define MPL_LOG_TAG "MPL-acc"
/* -------------------------------------------------------------------------- */
/* full scale setting - register & mask */
#define LSM303DLx_CTRL_REG1 (0x20)
#define LSM303DLx_CTRL_REG2 (0x21)
#define LSM303DLx_CTRL_REG3 (0x22)
#define LSM303DLx_CTRL_REG4 (0x23)
#define LSM303DLx_CTRL_REG5 (0x24)
#define LSM303DLx_HP_FILTER_RESET (0x25)
#define LSM303DLx_REFERENCE (0x26)
#define LSM303DLx_STATUS_REG (0x27)
#define LSM303DLx_OUT_X_L (0x28)
#define LSM303DLx_OUT_X_H (0x29)
#define LSM303DLx_OUT_Y_L (0x2a)
#define LSM303DLx_OUT_Y_H (0x2b)
#define LSM303DLx_OUT_Z_L (0x2b)
#define LSM303DLx_OUT_Z_H (0x2d)
#define LSM303DLx_INT1_CFG (0x30)
#define LSM303DLx_INT1_SRC (0x31)
#define LSM303DLx_INT1_THS (0x32)
#define LSM303DLx_INT1_DURATION (0x33)
#define LSM303DLx_INT2_CFG (0x34)
#define LSM303DLx_INT2_SRC (0x35)
#define LSM303DLx_INT2_THS (0x36)
#define LSM303DLx_INT2_DURATION (0x37)
#define LSM303DLx_CTRL_MASK (0x30)
#define LSM303DLx_SLEEP_MASK (0x20)
#define LSM303DLx_PWR_MODE_NORMAL (0x20)
#define LSM303DLx_MAX_DUR (0x7F)
/* -------------------------------------------------------------------------- */
struct lsm303dlx_a_config {
unsigned int odr;
unsigned int fsr; /** < full scale range mg */
unsigned int ths; /** < Motion no-motion thseshold mg */
unsigned int dur; /** < Motion no-motion duration ms */
unsigned char reg_ths;
unsigned char reg_dur;
unsigned char ctrl_reg1;
unsigned char irq_type;
unsigned char mot_int1_cfg;
};
struct lsm303dlx_a_private_data {
struct lsm303dlx_a_config suspend;
struct lsm303dlx_a_config resume;
};
/* -------------------------------------------------------------------------- */
static int lsm303dlx_a_set_ths(void *mlsl_handle,
struct ext_slave_platform_data *pdata,
struct lsm303dlx_a_config *config,
int apply,
long ths)
{
int result = INV_SUCCESS;
if ((unsigned int) ths >= config->fsr)
ths = (long) config->fsr - 1;
if (ths < 0)
ths = 0;
config->ths = ths;
config->reg_ths = (unsigned char)(long)((ths * 128L) / (config->fsr));
MPL_LOGV("THS: %d, 0x%02x\n", config->ths, (int)config->reg_ths);
if (apply)
result = inv_serial_single_write(mlsl_handle, pdata->address,
LSM303DLx_INT1_THS,
config->reg_ths);
return result;
}
static int lsm303dlx_a_set_dur(void *mlsl_handle,
struct ext_slave_platform_data *pdata,
struct lsm303dlx_a_config *config,
int apply,
long dur)
{
int result = INV_SUCCESS;
long reg_dur = (dur * config->odr) / 1000000L;
config->dur = dur;
if (reg_dur > LSM303DLx_MAX_DUR)
reg_dur = LSM303DLx_MAX_DUR;
config->reg_dur = (unsigned char) reg_dur;
MPL_LOGV("DUR: %d, 0x%02x\n", config->dur, (int)config->reg_dur);
if (apply)
result = inv_serial_single_write(mlsl_handle, pdata->address,
LSM303DLx_INT1_DURATION,
(unsigned char)reg_dur);
return result;
}
/**
* Sets the IRQ to fire when one of the IRQ events occur. Threshold and
* duration will not be used uless the type is MOT or NMOT.
*
* @param config configuration to apply to, suspend or resume
* @param irq_type The type of IRQ. Valid values are
* - MPU_SLAVE_IRQ_TYPE_NONE
* - MPU_SLAVE_IRQ_TYPE_MOTION
* - MPU_SLAVE_IRQ_TYPE_DATA_READY
*/
static int lsm303dlx_a_set_irq(void *mlsl_handle,
struct ext_slave_platform_data *pdata,
struct lsm303dlx_a_config *config,
int apply,
long irq_type)
{
int result = INV_SUCCESS;
unsigned char reg1;
unsigned char reg2;
config->irq_type = (unsigned char)irq_type;
if (irq_type == MPU_SLAVE_IRQ_TYPE_DATA_READY) {
reg1 = 0x02;
reg2 = 0x00;
} else if (irq_type == MPU_SLAVE_IRQ_TYPE_MOTION) {
reg1 = 0x00;
reg2 = config->mot_int1_cfg;
} else {
reg1 = 0x00;
reg2 = 0x00;
}
if (apply) {
result = inv_serial_single_write(mlsl_handle, pdata->address,
LSM303DLx_CTRL_REG3, reg1);
result = inv_serial_single_write(mlsl_handle, pdata->address,
LSM303DLx_INT1_CFG, reg2);
}
return result;
}
/**
* @brief Set the output data rate for the particular configuration.
*
* @param mlsl_handle
* the handle to the serial channel the device is connected to.
* @param pdata
* a pointer to the slave platform data.
* @param config
* Config to modify with new ODR.
* @param apply
* whether to apply immediately or save the settings to be applied
* at the next resume.
* @param odr
* Output data rate in units of 1/1000Hz (mHz).
*
* @return INV_SUCCESS if successful or a non-zero error code.
*/
static int lsm303dlx_a_set_odr(void *mlsl_handle,
struct ext_slave_platform_data *pdata,
struct lsm303dlx_a_config *config,
int apply,
long odr)
{
unsigned char bits;
int result = INV_SUCCESS;
/* normal power modes */
if (odr > 400000) {
config->odr = 1000000;
bits = LSM303DLx_PWR_MODE_NORMAL | 0x18;
} else if (odr > 100000) {
config->odr = 400000;
bits = LSM303DLx_PWR_MODE_NORMAL | 0x10;
} else if (odr > 50000) {
config->odr = 100000;
bits = LSM303DLx_PWR_MODE_NORMAL | 0x08;
} else if (odr > 10000) {
config->odr = 50000;
bits = LSM303DLx_PWR_MODE_NORMAL | 0x00;
/* low power modes */
} else if (odr > 5000) {
config->odr = 10000;
bits = 0xC0;
} else if (odr > 2000) {
config->odr = 5000;
bits = 0xA0;
} else if (odr > 1000) {
config->odr = 2000;
bits = 0x80;
} else if (odr > 500) {
config->odr = 1000;
bits = 0x60;
} else if (odr > 0) {
config->odr = 500;
bits = 0x40;
} else {
config->odr = 0;
bits = 0;
}
config->ctrl_reg1 = bits | (config->ctrl_reg1 & 0x7);
lsm303dlx_a_set_dur(mlsl_handle, pdata, config, apply, config->dur);
MPL_LOGV("ODR: %d, 0x%02x\n", config->odr, (int)config->ctrl_reg1);
if (apply)
result = inv_serial_single_write(mlsl_handle, pdata->address,
LSM303DLx_CTRL_REG1,
config->ctrl_reg1);
return result;
}
/**
* @brief Set the full scale range of the accels
*
* @param mlsl_handle
* the handle to the serial channel the device is connected to.
* @param pdata
* a pointer to the slave platform data.
* @param config
* pointer to configuration.
* @param apply
* whether to apply immediately or save the settings to be applied
* at the next resume.
* @param fsr
* requested full scale range.
*
* @return INV_SUCCESS if successful or a non-zero error code.
*/
static int lsm303dlx_a_set_fsr(void *mlsl_handle,
struct ext_slave_platform_data *pdata,
struct lsm303dlx_a_config *config,
int apply,
long fsr)
{
unsigned char reg1 = 0x40;
int result = INV_SUCCESS;
if (fsr <= 2048) {
config->fsr = 2048;
} else if (fsr <= 4096) {
reg1 |= 0x30;
config->fsr = 4096;
} else {
reg1 |= 0x10;
config->fsr = 8192;
}
lsm303dlx_a_set_ths(mlsl_handle, pdata,
config, apply, config->ths);
MPL_LOGV("FSR: %d\n", config->fsr);
if (apply)
result = inv_serial_single_write(mlsl_handle, pdata->address,
LSM303DLx_CTRL_REG4, reg1);
return result;
}
/**
* @brief suspends the device to put it in its lowest power mode.
*
* @param mlsl_handle
* the handle to the serial channel the device is connected to.
* @param slave
* a pointer to the slave descriptor data structure.
* @param pdata
* a pointer to the slave platform data.
*
* @return INV_SUCCESS if successful or a non-zero error code.
*/
static int lsm303dlx_a_suspend(void *mlsl_handle,
struct ext_slave_descr *slave,
struct ext_slave_platform_data *pdata)
{
int result = INV_SUCCESS;
unsigned char reg1;
unsigned char reg2;
struct lsm303dlx_a_private_data *private_data =
(struct lsm303dlx_a_private_data *)(pdata->private_data);
result = inv_serial_single_write(mlsl_handle, pdata->address,
LSM303DLx_CTRL_REG1,
private_data->suspend.ctrl_reg1);
result = inv_serial_single_write(mlsl_handle, pdata->address,
LSM303DLx_CTRL_REG2, 0x0f);
reg1 = 0x40;
if (private_data->suspend.fsr == 8192)
reg1 |= 0x30;
else if (private_data->suspend.fsr == 4096)
reg1 |= 0x10;
/* else bits [4..5] are already zero */
result = inv_serial_single_write(mlsl_handle, pdata->address,
LSM303DLx_CTRL_REG4, reg1);
result = inv_serial_single_write(mlsl_handle, pdata->address,
LSM303DLx_INT1_THS,
private_data->suspend.reg_ths);
result = inv_serial_single_write(mlsl_handle, pdata->address,
LSM303DLx_INT1_DURATION,
private_data->suspend.reg_dur);
if (private_data->suspend.irq_type == MPU_SLAVE_IRQ_TYPE_DATA_READY) {
reg1 = 0x02;
reg2 = 0x00;
} else if (private_data->suspend.irq_type ==
MPU_SLAVE_IRQ_TYPE_MOTION) {
reg1 = 0x00;
reg2 = private_data->suspend.mot_int1_cfg;
} else {
reg1 = 0x00;
reg2 = 0x00;
}
result = inv_serial_single_write(mlsl_handle, pdata->address,
LSM303DLx_CTRL_REG3, reg1);
result = inv_serial_single_write(mlsl_handle, pdata->address,
LSM303DLx_INT1_CFG, reg2);
result = inv_serial_read(mlsl_handle, pdata->address,
LSM303DLx_HP_FILTER_RESET, 1, ®1);
return result;
}
/**
* @brief resume the device in the proper power state given the configuration
* chosen.
*
* @param mlsl_handle
* the handle to the serial channel the device is connected to.
* @param slave
* a pointer to the slave descriptor data structure.
* @param pdata
* a pointer to the slave platform data.
*
* @return INV_SUCCESS if successful or a non-zero error code.
*/
static int lsm303dlx_a_resume(void *mlsl_handle,
struct ext_slave_descr *slave,
struct ext_slave_platform_data *pdata)
{
int result = INV_SUCCESS;
unsigned char reg1;
unsigned char reg2;
struct lsm303dlx_a_private_data *private_data =
(struct lsm303dlx_a_private_data *)(pdata->private_data);
result = inv_serial_single_write(mlsl_handle, pdata->address,
LSM303DLx_CTRL_REG1,
private_data->resume.ctrl_reg1);
if (result) {
LOG_RESULT_LOCATION(result);
return result;
}
msleep(6);
/* Full Scale */
reg1 = 0x40;
if (private_data->resume.fsr == 8192)
reg1 |= 0x30;
else if (private_data->resume.fsr == 4096)
reg1 |= 0x10;
result = inv_serial_single_write(mlsl_handle, pdata->address,
LSM303DLx_CTRL_REG4, reg1);
if (result) {
LOG_RESULT_LOCATION(result);
return result;
}
/* Configure high pass filter */
result = inv_serial_single_write(mlsl_handle, pdata->address,
LSM303DLx_CTRL_REG2, 0x0F);
if (result) {
LOG_RESULT_LOCATION(result);
return result;
}
if (private_data->resume.irq_type == MPU_SLAVE_IRQ_TYPE_DATA_READY) {
reg1 = 0x02;
reg2 = 0x00;
} else if (private_data->resume.irq_type ==
MPU_SLAVE_IRQ_TYPE_MOTION) {
reg1 = 0x00;
reg2 = private_data->resume.mot_int1_cfg;
} else {
reg1 = 0x00;
reg2 = 0x00;
}
result = inv_serial_single_write(mlsl_handle, pdata->address,
LSM303DLx_CTRL_REG3, reg1);
if (result) {
LOG_RESULT_LOCATION(result);
return result;
}
result = inv_serial_single_write(mlsl_handle, pdata->address,
LSM303DLx_INT1_THS,
private_data->resume.reg_ths);
if (result) {
LOG_RESULT_LOCATION(result);
return result;
}
result = inv_serial_single_write(mlsl_handle, pdata->address,
LSM303DLx_INT1_DURATION,
private_data->resume.reg_dur);
if (result) {
LOG_RESULT_LOCATION(result);
return result;
}
result = inv_serial_single_write(mlsl_handle, pdata->address,
LSM303DLx_INT1_CFG, reg2);
if (result) {
LOG_RESULT_LOCATION(result);
return result;
}
result = inv_serial_read(mlsl_handle, pdata->address,
LSM303DLx_HP_FILTER_RESET, 1, ®1);
if (result) {
LOG_RESULT_LOCATION(result);
return result;
}
return result;
}
/**
* @brief read the sensor data from the device.
*
* @param mlsl_handle
* the handle to the serial channel the device is connected to.
* @param slave
* a pointer to the slave descriptor data structure.
* @param pdata
* a pointer to the slave platform data.
* @param data
* a buffer to store the data read.
*
* @return INV_SUCCESS if successful or a non-zero error code.
*/
static int lsm303dlx_a_read(void *mlsl_handle,
struct ext_slave_descr *slave,
struct ext_slave_platform_data *pdata,
unsigned char *data)
{
int result = INV_SUCCESS;
result = inv_serial_read(mlsl_handle, pdata->address,
LSM303DLx_STATUS_REG, 1, data);
if (data[0] & 0x0F) {
result = inv_serial_read(mlsl_handle, pdata->address,
slave->read_reg, slave->read_len, data);
return result;
} else
return INV_ERROR_ACCEL_DATA_NOT_READY;
}
/**
* @brief one-time device driver initialization function.
* If the driver is built as a kernel module, this function will be
* called when the module is loaded in the kernel.
* If the driver is built-in in the kernel, this function will be
* called at boot time.
*
* @param mlsl_handle
* the handle to the serial channel the device is connected to.
* @param slave
* a pointer to the slave descriptor data structure.
* @param pdata
* a pointer to the slave platform data.
*
* @return INV_SUCCESS if successful or a non-zero error code.
*/
static int lsm303dlx_a_init(void *mlsl_handle,
struct ext_slave_descr *slave,
struct ext_slave_platform_data *pdata)
{
long range;
struct lsm303dlx_a_private_data *private_data;
private_data = (struct lsm303dlx_a_private_data *)
kzalloc(sizeof(struct lsm303dlx_a_private_data), GFP_KERNEL);
if (!private_data)
return INV_ERROR_MEMORY_EXAUSTED;
pdata->private_data = private_data;
private_data->resume.ctrl_reg1 = 0x37;
private_data->suspend.ctrl_reg1 = 0x47;
private_data->resume.mot_int1_cfg = 0x95;
private_data->suspend.mot_int1_cfg = 0x2a;
lsm303dlx_a_set_odr(mlsl_handle, pdata, &private_data->suspend,
false, 0);
lsm303dlx_a_set_odr(mlsl_handle, pdata, &private_data->resume,
false, 200000);
range = range_fixedpoint_to_long_mg(slave->range);
lsm303dlx_a_set_fsr(mlsl_handle, pdata, &private_data->suspend,
false, range);
lsm303dlx_a_set_fsr(mlsl_handle, pdata, &private_data->resume,
false, range);
lsm303dlx_a_set_ths(mlsl_handle, pdata, &private_data->suspend,
false, 80);
lsm303dlx_a_set_ths(mlsl_handle, pdata, &private_data->resume,
false, 40);
lsm303dlx_a_set_dur(mlsl_handle, pdata, &private_data->suspend,
false, 1000);
lsm303dlx_a_set_dur(mlsl_handle, pdata, &private_data->resume,
false, 2540);
lsm303dlx_a_set_irq(mlsl_handle, pdata, &private_data->suspend,
false, MPU_SLAVE_IRQ_TYPE_NONE);
lsm303dlx_a_set_irq(mlsl_handle, pdata, &private_data->resume,
false, MPU_SLAVE_IRQ_TYPE_NONE);
return INV_SUCCESS;
}
/**
* @brief one-time device driver exit function.
* If the driver is built as a kernel module, this function will be
* called when the module is removed from the kernel.
*
* @param mlsl_handle
* the handle to the serial channel the device is connected to.
* @param slave
* a pointer to the slave descriptor data structure.
* @param pdata
* a pointer to the slave platform data.
*
* @return INV_SUCCESS if successful or a non-zero error code.
*/
static int lsm303dlx_a_exit(void *mlsl_handle,
struct ext_slave_descr *slave,
struct ext_slave_platform_data *pdata)
{
kfree(pdata->private_data);
return INV_SUCCESS;
}
/**
* @brief device configuration facility.
*
* @param mlsl_handle
* the handle to the serial channel the device is connected to.
* @param slave
* a pointer to the slave descriptor data structure.
* @param pdata
* a pointer to the slave platform data.
* @param data
* a pointer to the configuration data structure.
*
* @return INV_SUCCESS if successful or a non-zero error code.
*/
static int lsm303dlx_a_config(void *mlsl_handle,
struct ext_slave_descr *slave,
struct ext_slave_platform_data *pdata,
struct ext_slave_config *data)
{
struct lsm303dlx_a_private_data *private_data = pdata->private_data;
if (!data->data)
return INV_ERROR_INVALID_PARAMETER;
switch (data->key) {
case MPU_SLAVE_CONFIG_ODR_SUSPEND:
return lsm303dlx_a_set_odr(mlsl_handle, pdata,
&private_data->suspend,
data->apply,
*((long *)data->data));
case MPU_SLAVE_CONFIG_ODR_RESUME:
return lsm303dlx_a_set_odr(mlsl_handle, pdata,
&private_data->resume,
data->apply,
*((long *)data->data));
case MPU_SLAVE_CONFIG_FSR_SUSPEND:
return lsm303dlx_a_set_fsr(mlsl_handle, pdata,
&private_data->suspend,
data->apply,
*((long *)data->data));
case MPU_SLAVE_CONFIG_FSR_RESUME:
return lsm303dlx_a_set_fsr(mlsl_handle, pdata,
&private_data->resume,
data->apply,
*((long *)data->data));
case MPU_SLAVE_CONFIG_MOT_THS:
return lsm303dlx_a_set_ths(mlsl_handle, pdata,
&private_data->suspend,
data->apply,
*((long *)data->data));
case MPU_SLAVE_CONFIG_NMOT_THS:
return lsm303dlx_a_set_ths(mlsl_handle, pdata,
&private_data->resume,
data->apply,
*((long *)data->data));
case MPU_SLAVE_CONFIG_MOT_DUR:
return lsm303dlx_a_set_dur(mlsl_handle, pdata,
&private_data->suspend,
data->apply,
*((long *)data->data));
case MPU_SLAVE_CONFIG_NMOT_DUR:
return lsm303dlx_a_set_dur(mlsl_handle, pdata,
&private_data->resume,
data->apply,
*((long *)data->data));
case MPU_SLAVE_CONFIG_IRQ_SUSPEND:
return lsm303dlx_a_set_irq(mlsl_handle, pdata,
&private_data->suspend,
data->apply,
*((long *)data->data));
case MPU_SLAVE_CONFIG_IRQ_RESUME:
return lsm303dlx_a_set_irq(mlsl_handle, pdata,
&private_data->resume,
data->apply,
*((long *)data->data));
default:
LOG_RESULT_LOCATION(INV_ERROR_FEATURE_NOT_IMPLEMENTED);
return INV_ERROR_FEATURE_NOT_IMPLEMENTED;
};
return INV_SUCCESS;
}
/**
* @brief facility to retrieve the device configuration.
*
* @param mlsl_handle
* the handle to the serial channel the device is connected to.
* @param slave
* a pointer to the slave descriptor data structure.
* @param pdata
* a pointer to the slave platform data.
* @param data
* a pointer to store the returned configuration data structure.
*
* @return INV_SUCCESS if successful or a non-zero error code.
*/
static int lsm303dlx_a_get_config(void *mlsl_handle,
struct ext_slave_descr *slave,
struct ext_slave_platform_data *pdata,
struct ext_slave_config *data)
{
struct lsm303dlx_a_private_data *private_data = pdata->private_data;
if (!data->data)
return INV_ERROR_INVALID_PARAMETER;
switch (data->key) {
case MPU_SLAVE_CONFIG_ODR_SUSPEND:
(*(unsigned long *)data->data) =
(unsigned long) private_data->suspend.odr;
break;
case MPU_SLAVE_CONFIG_ODR_RESUME:
(*(unsigned long *)data->data) =
(unsigned long) private_data->resume.odr;
break;
case MPU_SLAVE_CONFIG_FSR_SUSPEND:
(*(unsigned long *)data->data) =
(unsigned long) private_data->suspend.fsr;
break;
case MPU_SLAVE_CONFIG_FSR_RESUME:
(*(unsigned long *)data->data) =
(unsigned long) private_data->resume.fsr;
break;
case MPU_SLAVE_CONFIG_MOT_THS:
(*(unsigned long *)data->data) =
(unsigned long) private_data->suspend.ths;
break;
case MPU_SLAVE_CONFIG_NMOT_THS:
(*(unsigned long *)data->data) =
(unsigned long) private_data->resume.ths;
break;
case MPU_SLAVE_CONFIG_MOT_DUR:
(*(unsigned long *)data->data) =
(unsigned long) private_data->suspend.dur;
break;
case MPU_SLAVE_CONFIG_NMOT_DUR:
(*(unsigned long *)data->data) =
(unsigned long) private_data->resume.dur;
break;
case MPU_SLAVE_CONFIG_IRQ_SUSPEND:
(*(unsigned long *)data->data) =
(unsigned long) private_data->suspend.irq_type;
break;
case MPU_SLAVE_CONFIG_IRQ_RESUME:
(*(unsigned long *)data->data) =
(unsigned long) private_data->resume.irq_type;
break;
default:
LOG_RESULT_LOCATION(INV_ERROR_FEATURE_NOT_IMPLEMENTED);
return INV_ERROR_FEATURE_NOT_IMPLEMENTED;
};
return INV_SUCCESS;
}
static struct ext_slave_descr lsm303dlx_a_descr = {
.init = lsm303dlx_a_init,
.exit = lsm303dlx_a_exit,
.suspend = lsm303dlx_a_suspend,
.resume = lsm303dlx_a_resume,
.read = lsm303dlx_a_read,
.config = lsm303dlx_a_config,
.get_config = lsm303dlx_a_get_config,
.name = "lsm303dlx_a",
.type = EXT_SLAVE_TYPE_ACCEL,
.id = ACCEL_ID_LSM303DLX,
.read_reg = (0x28 | 0x80), /* 0x80 for burst reads */
.read_len = 6,
.endian = EXT_SLAVE_BIG_ENDIAN,
.range = {2, 480},
.trigger = NULL,
};
static
struct ext_slave_descr *lsm303dlx_a_get_slave_descr(void)
{
return &lsm303dlx_a_descr;
}
/* -------------------------------------------------------------------------- */
struct lsm303dlx_a_mod_private_data {
struct i2c_client *client;
struct ext_slave_platform_data *pdata;
};
static unsigned short normal_i2c[] = { I2C_CLIENT_END };
static int lsm303dlx_a_mod_probe(struct i2c_client *client,
const struct i2c_device_id *devid)
{
struct ext_slave_platform_data *pdata;
struct lsm303dlx_a_mod_private_data *private_data;
int result = 0;
dev_info(&client->adapter->dev, "%s: %s\n", __func__, devid->name);
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
result = -ENODEV;
goto out_no_free;
}
pdata = client->dev.platform_data;
if (!pdata) {
dev_err(&client->adapter->dev,
"Missing platform data for slave %s\n", devid->name);
result = -EFAULT;
goto out_no_free;
}
private_data = kzalloc(sizeof(*private_data), GFP_KERNEL);
if (!private_data) {
result = -ENOMEM;
goto out_no_free;
}
i2c_set_clientdata(client, private_data);
private_data->client = client;
private_data->pdata = pdata;
result = inv_mpu_register_slave(THIS_MODULE, client, pdata,
lsm303dlx_a_get_slave_descr);
if (result) {
dev_err(&client->adapter->dev,
"Slave registration failed: %s, %d\n",
devid->name, result);
goto out_free_memory;
}
return result;
out_free_memory:
kfree(private_data);
out_no_free:
dev_err(&client->adapter->dev, "%s failed %d\n", __func__, result);
return result;
}
static int lsm303dlx_a_mod_remove(struct i2c_client *client)
{
struct lsm303dlx_a_mod_private_data *private_data =
i2c_get_clientdata(client);
dev_dbg(&client->adapter->dev, "%s\n", __func__);
inv_mpu_unregister_slave(client, private_data->pdata,
lsm303dlx_a_get_slave_descr);
kfree(private_data);
return 0;
}
static const struct i2c_device_id lsm303dlx_a_mod_id[] = {
{ "lsm303dlx", ACCEL_ID_LSM303DLX },
{}
};
MODULE_DEVICE_TABLE(i2c, lsm303dlx_a_mod_id);
static struct i2c_driver lsm303dlx_a_mod_driver = {
.class = I2C_CLASS_HWMON,
.probe = lsm303dlx_a_mod_probe,
.remove = lsm303dlx_a_mod_remove,
.id_table = lsm303dlx_a_mod_id,
.driver = {
.owner = THIS_MODULE,
.name = "lsm303dlx_a_mod",
},
.address_list = normal_i2c,
};
static int __init lsm303dlx_a_mod_init(void)
{
int res = i2c_add_driver(&lsm303dlx_a_mod_driver);
pr_info("%s: Probe name %s\n", __func__, "lsm303dlx_a_mod");
if (res)
pr_err("%s failed\n", __func__);
return res;
}
static void __exit lsm303dlx_a_mod_exit(void)
{
pr_info("%s\n", __func__);
i2c_del_driver(&lsm303dlx_a_mod_driver);
}
module_init(lsm303dlx_a_mod_init);
module_exit(lsm303dlx_a_mod_exit);
MODULE_AUTHOR("Invensense Corporation");
MODULE_DESCRIPTION("Driver to integrate LSM303DLX_A sensor with the MPU");
MODULE_LICENSE("GPL");
MODULE_ALIAS("lsm303dlx_a_mod");
/**
* @}
*/