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/*
$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 <http://www.gnu.org/licenses/>.
$
*/
/**
* @addtogroup ACCELDL
* @brief Accelerometer setup and handling methods for Kionix KXSD9.
*
* @{
* @file kxsd9.c
* @brief Accelerometer setup and handling methods for Kionix KXSD9.
*/
/* -------------------------------------------------------------------------- */
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include "mpu-dev.h"
#include <log.h>
#include <linux/mpu.h>
#include "mlsl.h"
#include "mldl_cfg.h"
#undef MPL_LOG_TAG
#define MPL_LOG_TAG "MPL-acc"
/* -------------------------------------------------------------------------- */
static int kxsd9_suspend(void *mlsl_handle,
struct ext_slave_descr *slave,
struct ext_slave_platform_data *pdata)
{
int result;
/* CTRL_REGB: low-power standby mode */
result =
inv_serial_single_write(mlsl_handle, pdata->address, 0x0d, 0x0);
if (result) {
LOG_RESULT_LOCATION(result);
return result;
}
return result;
}
/* full scale setting - register and mask */
#define ACCEL_KIONIX_CTRL_REG (0x0C)
#define ACCEL_KIONIX_CTRL_MASK (0x3)
static int kxsd9_resume(void *mlsl_handle,
struct ext_slave_descr *slave,
struct ext_slave_platform_data *pdata)
{
int result = INV_SUCCESS;
unsigned char reg;
/* Full Scale */
reg = 0x0;
reg &= ~ACCEL_KIONIX_CTRL_MASK;
reg |= 0x00;
if (slave->range.mantissa == 4) { /* 4g scale = 4.9951 */
reg |= 0x2;
slave->range.fraction = 9951;
} else if (slave->range.mantissa == 7) { /* 6g scale = 7.5018 */
reg |= 0x1;
slave->range.fraction = 5018;
} else if (slave->range.mantissa == 9) { /* 8g scale = 9.9902 */
reg |= 0x0;
slave->range.fraction = 9902;
} else {
slave->range.mantissa = 2; /* 2g scale = 2.5006 */
slave->range.fraction = 5006;
reg |= 0x3;
}
reg |= 0xC0; /* 100Hz LPF */
result =
inv_serial_single_write(mlsl_handle, pdata->address,
ACCEL_KIONIX_CTRL_REG, reg);
if (result) {
LOG_RESULT_LOCATION(result);
return result;
}
/* normal operation */
result =
inv_serial_single_write(mlsl_handle, pdata->address, 0x0d, 0x40);
if (result) {
LOG_RESULT_LOCATION(result);
return result;
}
return INV_SUCCESS;
}
static int kxsd9_read(void *mlsl_handle,
struct ext_slave_descr *slave,
struct ext_slave_platform_data *pdata,
unsigned char *data)
{
int result;
result = inv_serial_read(mlsl_handle, pdata->address,
slave->read_reg, slave->read_len, data);
return result;
}
static struct ext_slave_descr kxsd9_descr = {
.init = NULL,
.exit = NULL,
.suspend = kxsd9_suspend,
.resume = kxsd9_resume,
.read = kxsd9_read,
.config = NULL,
.get_config = NULL,
.name = "kxsd9",
.type = EXT_SLAVE_TYPE_ACCEL,
.id = ACCEL_ID_KXSD9,
.read_reg = 0x00,
.read_len = 6,
.endian = EXT_SLAVE_BIG_ENDIAN,
.range = {2, 5006},
.trigger = NULL,
};
static
struct ext_slave_descr *kxsd9_get_slave_descr(void)
{
return &kxsd9_descr;
}
/* -------------------------------------------------------------------------- */
struct kxsd9_mod_private_data {
struct i2c_client *client;
struct ext_slave_platform_data *pdata;
};
static unsigned short normal_i2c[] = { I2C_CLIENT_END };
static int kxsd9_mod_probe(struct i2c_client *client,
const struct i2c_device_id *devid)
{
struct ext_slave_platform_data *pdata;
struct kxsd9_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,
kxsd9_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 kxsd9_mod_remove(struct i2c_client *client)
{
struct kxsd9_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,
kxsd9_get_slave_descr);
kfree(private_data);
return 0;
}
static const struct i2c_device_id kxsd9_mod_id[] = {
{ "kxsd9", ACCEL_ID_KXSD9 },
{}
};
MODULE_DEVICE_TABLE(i2c, kxsd9_mod_id);
static struct i2c_driver kxsd9_mod_driver = {
.class = I2C_CLASS_HWMON,
.probe = kxsd9_mod_probe,
.remove = kxsd9_mod_remove,
.id_table = kxsd9_mod_id,
.driver = {
.owner = THIS_MODULE,
.name = "kxsd9_mod",
},
.address_list = normal_i2c,
};
static int __init kxsd9_mod_init(void)
{
int res = i2c_add_driver(&kxsd9_mod_driver);
pr_info("%s: Probe name %s\n", __func__, "kxsd9_mod");
if (res)
pr_err("%s failed\n", __func__);
return res;
}
static void __exit kxsd9_mod_exit(void)
{
pr_info("%s\n", __func__);
i2c_del_driver(&kxsd9_mod_driver);
}
module_init(kxsd9_mod_init);
module_exit(kxsd9_mod_exit);
MODULE_AUTHOR("Invensense Corporation");
MODULE_DESCRIPTION("Driver to integrate KXSD9 sensor with the MPU");
MODULE_LICENSE("GPL");
MODULE_ALIAS("kxsd9_mod");
/**
* @}
*/
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