/* drivers/input/sensors/access/kxtik.c
|
*
|
* Copyright (C) 2012-2015 ROCKCHIP.
|
* Author: luowei <lw@rock-chips.com>
|
*
|
* This software is licensed under the terms of the GNU General Public
|
* License version 2, as published by the Free Software Foundation, and
|
* may be copied, distributed, and modified under those terms.
|
*
|
* 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.
|
*
|
*/
|
#include <linux/interrupt.h>
|
#include <linux/i2c.h>
|
#include <linux/slab.h>
|
#include <linux/irq.h>
|
#include <linux/miscdevice.h>
|
#include <linux/gpio.h>
|
#include <linux/uaccess.h>
|
#include <asm/atomic.h>
|
#include <linux/delay.h>
|
#include <linux/input.h>
|
#include <linux/workqueue.h>
|
#include <linux/freezer.h>
|
#include <linux/of_gpio.h>
|
#ifdef CONFIG_HAS_EARLYSUSPEND
|
#include <linux/earlysuspend.h>
|
#endif
|
#include <linux/sensor-dev.h>
|
|
|
#define LIS3DH_INT_COUNT (0x0E)
|
#define LIS3DH_WHO_AM_I (0x0F)
|
|
/* full scale setting - register & mask */
|
#define LIS3DH_TEMP_CFG_REG (0x1F)
|
#define LIS3DH_CTRL_REG1 (0x20)
|
#define LIS3DH_CTRL_REG2 (0x21)
|
#define LIS3DH_CTRL_REG3 (0x22)
|
#define LIS3DH_CTRL_REG4 (0x23)
|
#define LIS3DH_CTRL_REG5 (0x24)
|
#define LIS3DH_CTRL_REG6 (0x25)
|
#define LIS3DH_REFERENCE (0x26)
|
#define LIS3DH_STATUS_REG (0x27)
|
#define LIS3DH_OUT_X_L (0x28)
|
#define LIS3DH_OUT_X_H (0x29)
|
#define LIS3DH_OUT_Y_L (0x2a)
|
#define LIS3DH_OUT_Y_H (0x2b)
|
#define LIS3DH_OUT_Z_L (0x2c)
|
#define LIS3DH_OUT_Z_H (0x2d)
|
#define LIS3DH_FIFO_CTRL_REG (0x2E)
|
|
#define LIS3DH_INT1_CFG (0x30)
|
#define LIS3DH_INT1_SRC (0x31)
|
#define LIS3DH_INT1_THS (0x32)
|
#define LIS3DH_INT1_DURATION (0x33)
|
|
#define LIS3DH_DEVID (0x33) //chip id
|
#define LIS3DH_ACC_DISABLE (0x08)
|
|
#define LIS3DH_RANGE 2000000
|
|
/* LIS3DH */
|
#define LIS3DH_PRECISION 16
|
#define LIS3DH_BOUNDARY (0x1 << (LIS3DH_PRECISION - 1))
|
#define LIS3DH_GRAVITY_STEP (LIS3DH_RANGE / LIS3DH_BOUNDARY)
|
|
#define ODR1 0x10 /* 1Hz output data rate */
|
#define ODR10 0x20 /* 10Hz output data rate */
|
#define ODR25 0x30 /* 25Hz output data rate */
|
#define ODR50 0x40 /* 50Hz output data rate */
|
#define ODR100 0x50 /* 100Hz output data rate */
|
#define ODR200 0x60 /* 200Hz output data rate */
|
#define ODR400 0x70 /* 400Hz output data rate */
|
#define ODR1250 0x90 /* 1250Hz output data rate */
|
|
|
|
struct sensor_reg_data {
|
char reg;
|
char data;
|
};
|
|
/****************operate according to sensor chip:start************/
|
|
static int sensor_active(struct i2c_client *client, int enable, int rate)
|
{
|
struct sensor_private_data *sensor =
|
(struct sensor_private_data *) i2c_get_clientdata(client);
|
int result = 0;
|
int status = 0;
|
|
sensor->ops->ctrl_data = sensor_read_reg(client, sensor->ops->ctrl_reg);
|
|
sensor->ops->ctrl_data |= ODR100; //100HZ,if 0 then power down
|
|
//register setting according to chip datasheet
|
if(!enable)
|
{
|
status = LIS3DH_ACC_DISABLE; //lis3dh
|
sensor->ops->ctrl_data |= status;
|
}
|
else
|
{
|
status = ~LIS3DH_ACC_DISABLE; //lis3dh
|
sensor->ops->ctrl_data &= status;
|
}
|
|
DBG("%s:reg=0x%x,reg_ctrl=0x%x,enable=%d\n",__func__,sensor->ops->ctrl_reg, sensor->ops->ctrl_data, enable);
|
result = sensor_write_reg(client, sensor->ops->ctrl_reg, sensor->ops->ctrl_data);
|
if(result)
|
printk("%s:fail to active sensor\n",__func__);
|
|
return result;
|
|
}
|
|
static int sensor_init(struct i2c_client *client)
|
{
|
struct sensor_private_data *sensor =
|
(struct sensor_private_data *) i2c_get_clientdata(client);
|
int result = 0;
|
int i;
|
struct sensor_reg_data reg_data[] =
|
{
|
{LIS3DH_CTRL_REG2,0X00},
|
{LIS3DH_CTRL_REG4,0x08}, //High resolution output mode: 1, Normal mode
|
{LIS3DH_CTRL_REG6,0x40},
|
{LIS3DH_TEMP_CFG_REG,0x00}, //
|
{LIS3DH_FIFO_CTRL_REG,0x00}, //
|
{LIS3DH_INT1_CFG,0xFF}, //6 direction position recognition
|
{LIS3DH_INT1_THS,0x7F}, //Interrupt 1 threshold
|
{LIS3DH_INT1_DURATION,0x7F}, //Duration value 0x00->ox7f
|
};
|
|
result = sensor->ops->active(client,0,0);
|
if(result)
|
{
|
printk("%s:line=%d,error\n",__func__,__LINE__);
|
return result;
|
}
|
|
sensor->status_cur = SENSOR_OFF;
|
|
for(i=0;i<(sizeof(reg_data)/sizeof(struct sensor_reg_data));i++)
|
{
|
result = sensor_write_reg(client, reg_data[i].reg, reg_data[i].data);
|
if(result)
|
{
|
printk("%s:line=%d,i=%d,error\n",__func__,__LINE__,i);
|
return result;
|
}
|
}
|
|
|
if(sensor->pdata->irq_enable)
|
{
|
|
result = sensor_write_reg(client, LIS3DH_CTRL_REG3, 0x40);//I1_AOI1 =1 if motion
|
if(result)
|
{
|
printk("%s:line=%d,error\n",__func__,__LINE__);
|
return result;
|
}
|
|
result = sensor_write_reg(client, LIS3DH_CTRL_REG5, 0x08);
|
if(result)
|
{
|
printk("%s:line=%d,error\n",__func__,__LINE__);
|
return result;
|
}
|
|
}
|
|
return result;
|
}
|
|
static int sensor_convert_data(struct i2c_client *client, char high_byte, char low_byte)
|
{
|
s64 result;
|
struct sensor_private_data *sensor =
|
(struct sensor_private_data *) i2c_get_clientdata(client);
|
/* int precision = sensor->ops->precision; */
|
switch (sensor->devid) {
|
case LIS3DH_DEVID:
|
result = ((int)high_byte << 8) | (int)low_byte;
|
if (result < LIS3DH_BOUNDARY)
|
result = result * LIS3DH_GRAVITY_STEP;
|
else
|
result = ~(((~result & (0x7fff >> (16 - LIS3DH_PRECISION))) + 1)
|
* LIS3DH_GRAVITY_STEP) + 1;
|
break;
|
|
default:
|
printk(KERN_ERR "%s: devid wasn't set correctly\n",__func__);
|
return -EFAULT;
|
}
|
|
return (int)result;
|
}
|
|
static int angle_report_value(struct i2c_client *client, struct sensor_axis *axis)
|
{
|
struct sensor_private_data *sensor =
|
(struct sensor_private_data *) i2c_get_clientdata(client);
|
|
/* Report acceleration sensor information */
|
input_report_abs(sensor->input_dev, ABS_X, axis->x);
|
input_report_abs(sensor->input_dev, ABS_Y, axis->y);
|
input_report_abs(sensor->input_dev, ABS_Z, axis->z);
|
input_sync(sensor->input_dev);
|
DBG("Gsensor x==%d y==%d z==%d\n",axis->x,axis->y,axis->z);
|
|
return 0;
|
}
|
|
#define GSENSOR_MIN 10
|
static int sensor_report_value(struct i2c_client *client)
|
{
|
struct sensor_private_data *sensor =
|
(struct sensor_private_data *) i2c_get_clientdata(client);
|
struct sensor_platform_data *pdata = sensor->pdata;
|
int ret = 0;
|
int x,y,z;
|
struct sensor_axis axis;
|
char buffer[6] = {0};
|
char value = 0;
|
|
if(sensor->ops->read_len < 6) //sensor->ops->read_len = 6
|
{
|
printk("%s:lenth is error,len=%d\n",__func__,sensor->ops->read_len);
|
return -1;
|
}
|
|
memset(buffer, 0, 6);
|
|
value = sensor_read_reg(client, LIS3DH_STATUS_REG);
|
if((value & 0x0f) == 0)
|
{
|
printk("%s:line=%d,value=0x%x,data is not ready\n",__func__,__LINE__,value);
|
return -1;
|
}
|
|
|
/* Data bytes from hardware xL, xH, yL, yH, zL, zH */
|
do {
|
*buffer = sensor->ops->read_reg;
|
ret = sensor_rx_data(client, buffer, sensor->ops->read_len);
|
if (ret < 0)
|
return ret;
|
} while (0);
|
|
//this angle need 6 bytes buffer
|
x = sensor_convert_data(sensor->client, buffer[1], buffer[0]); //buffer[1]:high bit
|
y = sensor_convert_data(sensor->client, buffer[3], buffer[2]);
|
z = sensor_convert_data(sensor->client, buffer[5], buffer[4]);
|
|
axis.x = (pdata->orientation[0])*x + (pdata->orientation[1])*y + (pdata->orientation[2])*z;
|
axis.y = (pdata->orientation[3])*x + (pdata->orientation[4])*y + (pdata->orientation[5])*z;
|
axis.z = (pdata->orientation[6])*x + (pdata->orientation[7])*y + (pdata->orientation[8])*z;
|
|
DBG( "%s: axis = %d %d %d \n", __func__, axis.x, axis.y, axis.z);
|
|
//Report event only while value is changed to save some power
|
if((abs(sensor->axis.x - axis.x) > GSENSOR_MIN) || (abs(sensor->axis.y - axis.y) > GSENSOR_MIN) || (abs(sensor->axis.z - axis.z) > GSENSOR_MIN))
|
{
|
angle_report_value(client, &axis);
|
|
/* »¥³âµØ»º´æÊý¾Ý. */
|
mutex_lock(&(sensor->data_mutex) );
|
sensor->axis = axis;
|
mutex_unlock(&(sensor->data_mutex) );
|
}
|
|
if((sensor->pdata->irq_enable)&& (sensor->ops->int_status_reg >= 0)) //read sensor intterupt status register
|
{
|
|
value = sensor_read_reg(client, sensor->ops->int_status_reg);
|
DBG("%s:sensor int status :0x%x\n",__func__,value);
|
}
|
|
return ret;
|
}
|
|
static struct sensor_operate angle_lis3dh_ops = {
|
.name = "angle_lis3dh",
|
.type = SENSOR_TYPE_ANGLE, //sensor type and it should be correct
|
.id_i2c = ANGLE_ID_LIS3DH, //i2c id number
|
.read_reg = (LIS3DH_OUT_X_L | 0x80), //read data
|
.read_len = 6, //data length
|
.id_reg = LIS3DH_WHO_AM_I, //read device id from this register
|
.id_data = LIS3DH_DEVID, //device id
|
.precision = LIS3DH_PRECISION, //12 bits
|
.ctrl_reg = LIS3DH_CTRL_REG1, //enable or disable
|
.int_status_reg = LIS3DH_INT1_SRC, //intterupt status register
|
.range = {-LIS3DH_RANGE,LIS3DH_RANGE}, //range
|
.trig = (IRQF_TRIGGER_LOW|IRQF_ONESHOT),
|
.active = sensor_active,
|
.init = sensor_init,
|
.report = sensor_report_value,
|
};
|
|
/****************operate according to sensor chip:end************/
|
static int angle_lis3dh_probe(struct i2c_client *client,
|
const struct i2c_device_id *devid)
|
{
|
return sensor_register_device(client, NULL, devid, &angle_lis3dh_ops);
|
}
|
|
static int angle_lis3dh_remove(struct i2c_client *client)
|
{
|
return sensor_unregister_device(client, NULL, &angle_lis3dh_ops);
|
}
|
|
static const struct i2c_device_id angle_lis3dh_id[] = {
|
{"angle_lis3dh", ANGLE_ID_LIS3DH},
|
{}
|
};
|
|
static struct i2c_driver angle_lis3dh_driver = {
|
.probe = angle_lis3dh_probe,
|
.remove = angle_lis3dh_remove,
|
.shutdown = sensor_shutdown,
|
.id_table = angle_lis3dh_id,
|
.driver = {
|
.name = "angle_lis3dh",
|
#ifdef CONFIG_PM
|
.pm = &sensor_pm_ops,
|
#endif
|
},
|
};
|
|
module_i2c_driver(angle_lis3dh_driver);
|
|
MODULE_AUTHOR("luowei <lw@rock-chips.com>");
|
MODULE_DESCRIPTION("lis3dh angle driver");
|
MODULE_LICENSE("GPL");
|
