/* drivers/input/sensors/access/angle_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 KXTIK_DEVID_1004 0x05 //chip id
#define KXTIK_DEVID_J9_1005 0x07 //chip id
#define KXTIK_DEVID_J2_1009 0x09 //chip id
#define KXTIK_DEVID_1013 0x11 //chip id
#define KXTIK_RANGE 2000000
#define KXTIK_XOUT_HPF_L (0x00) /* 0000 0000 */
#define KXTIK_XOUT_HPF_H (0x01) /* 0000 0001 */
#define KXTIK_YOUT_HPF_L (0x02) /* 0000 0010 */
#define KXTIK_YOUT_HPF_H (0x03) /* 0000 0011 */
#define KXTIK_ZOUT_HPF_L (0x04) /* 0001 0100 */
#define KXTIK_ZOUT_HPF_H (0x05) /* 0001 0101 */
#define KXTIK_XOUT_L (0x06) /* 0000 0110 */
#define KXTIK_XOUT_H (0x07) /* 0000 0111 */
#define KXTIK_YOUT_L (0x08) /* 0000 1000 */
#define KXTIK_YOUT_H (0x09) /* 0000 1001 */
#define KXTIK_ZOUT_L (0x0A) /* 0001 1010 */
#define KXTIK_ZOUT_H (0x0B) /* 0001 1011 */
#define KXTIK_ST_RESP (0x0C) /* 0000 1100 */
#define KXTIK_WHO_AM_I (0x0F) /* 0000 1111 */
#define KXTIK_TILT_POS_CUR (0x10) /* 0001 0000 */
#define KXTIK_TILT_POS_PRE (0x11) /* 0001 0001 */
#define KXTIK_INT_SRC_REG1 (0x15) /* 0001 0101 */
#define KXTIK_INT_SRC_REG2 (0x16) /* 0001 0110 */
#define KXTIK_STATUS_REG (0x18) /* 0001 1000 */
#define KXTIK_INT_REL (0x1A) /* 0001 1010 */
#define KXTIK_CTRL_REG1 (0x1B) /* 0001 1011 */
#define KXTIK_CTRL_REG2 (0x1C) /* 0001 1100 */
#define KXTIK_CTRL_REG3 (0x1D) /* 0001 1101 */
#define KXTIK_INT_CTRL_REG1 (0x1E) /* 0001 1110 */
#define KXTIK_INT_CTRL_REG2 (0x1F) /* 0001 1111 */
#define KXTIK_INT_CTRL_REG3 (0x20) /* 0010 0000 */
#define KXTIK_DATA_CTRL_REG (0x21) /* 0010 0001 */
#define KXTIK_TILT_TIMER (0x28) /* 0010 1000 */
#define KXTIK_WUF_TIMER (0x29) /* 0010 1001 */
#define KXTIK_TDT_TIMER (0x2B) /* 0010 1011 */
#define KXTIK_TDT_H_THRESH (0x2C) /* 0010 1100 */
#define KXTIK_TDT_L_THRESH (0x2D) /* 0010 1101 */
#define KXTIK_TDT_TAP_TIMER (0x2E) /* 0010 1110 */
#define KXTIK_TDT_TOTAL_TIMER (0x2F) /* 0010 1111 */
#define KXTIK_TDT_LATENCY_TIMER (0x30) /* 0011 0000 */
#define KXTIK_TDT_WINDOW_TIMER (0x31) /* 0011 0001 */
#define KXTIK_WUF_THRESH (0x5A) /* 0101 1010 */
#define KXTIK_TILT_ANGLE (0x5C) /* 0101 1100 */
#define KXTIK_HYST_SET (0x5F) /* 0101 1111 */
/* CONTROL REGISTER 1 BITS */
#define KXTIK_DISABLE 0x7F
#define KXTIK_ENABLE (1 << 7)
#define KXTIK_DRDYE (1 << 5)
/* INPUT_ABS CONSTANTS */
#define FUZZ 3
#define FLAT 3
/* RESUME STATE INDICES */
#define RES_DATA_CTRL 0
#define RES_CTRL_REG1 1
#define RES_INT_CTRL1 2
#define RESUME_ENTRIES 3
/* CTRL_REG1: set resolution, g-range, data ready enable */
/* Output resolution: 8-bit valid or 12-bit valid */
#define KXTIK_RES_8BIT 0
#define KXTIK_RES_12BIT (1 << 6)
/* Output g-range: +/-2g, 4g, or 8g */
#define KXTIK_G_2G 0
#define KXTIK_G_4G (1 << 3)
#define KXTIK_G_8G (1 << 4)
/* DATA_CTRL_REG: controls the output data rate of the part */
#define KXTIK_ODR12_5F 0
#define KXTIK_ODR25F 1
#define KXTIK_ODR50F 2
#define KXTIK_ODR100F 3
#define KXTIK_ODR200F 4
#define KXTIK_ODR400F 5
#define KXTIK_ODR800F 6
/* kxtik */
#define KXTIK_PRECISION 12
#define KXTIK_BOUNDARY (0x1 << (KXTIK_PRECISION - 1))
#define KXTIK_GRAVITY_STEP KXTIK_RANGE / KXTIK_BOUNDARY
/****************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);
//register setting according to chip datasheet
if(enable)
{
status = KXTIK_ENABLE; //kxtik
sensor->ops->ctrl_data |= status;
}
else
{
status = ~KXTIK_ENABLE; //kxtik
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 = 0;
unsigned char id_reg = KXTIK_WHO_AM_I;
unsigned char id_data = 0;
unsigned char ctrl_data_save = 0;
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<3; i++)
{
result = sensor_rx_data(client, &id_reg, 1);
id_data = id_reg;
if(!result)
break;
}
if(result)
{
printk("%s:fail to read id,result=%d\n",__func__, result);
return result;
}
sensor->devid = id_data;
result = sensor_write_reg(client, KXTIK_DATA_CTRL_REG, KXTIK_ODR400F);
if(result)
{
printk("%s:line=%d,error\n",__func__,__LINE__);
return result;
}
if(sensor->pdata->irq_enable) //open interrupt
{
/*
BIT 4 IEA sets the polarity of the physical interrupt pin (7)
IEA = 0 ? polarity of the physical interrupt pin (7) is active low
IEA = 1 ? polarity of the physical interrupt pin (7) is active high
BIT 3 IEL sets the response of the physical interrupt pin (7)
IEL = 0 ? the physical interrupt pin (7) latches until it is cleared by reading INT_REL
IEL = 1 ? the physical interrupt pin (7) will transmit one pulse with a period of 0.03 - 0.05ms
*/
if (id_data == KXTIK_DEVID_1004)
result = sensor_write_reg(client, KXTIK_INT_CTRL_REG1, 0x34);//enable int,active high,need read INT_REL
else
result = sensor_write_reg(client, KXTIK_INT_CTRL_REG1, 0x28);//enable int,active high,need read INT_REL
if(result)
{
printk("%s:line=%d,error\n",__func__,__LINE__);
return result;
}
}
ctrl_data_save = sensor_read_reg(client, sensor->ops->ctrl_reg);
DBG("%s: ctrl_data_save = 0x%x\n", __func__, ctrl_data_save);
sensor->ops->ctrl_data = (KXTIK_RES_12BIT | KXTIK_G_2G);
if(sensor->pdata->irq_enable)
{
sensor->ops->ctrl_data &= ~KXTIK_ENABLE;
sensor->ops->ctrl_data |= KXTIK_DRDYE;
}
DBG("%s: first write sensor->ops->ctrl_data = 0x%x\n", __func__, sensor->ops->ctrl_data);
result = sensor_write_reg(client, sensor->ops->ctrl_reg, sensor->ops->ctrl_data);
if(result)
{
printk("%s:line=%d,error\n",__func__,__LINE__);
return result;
}
if(ctrl_data_save & 0x80)
sensor->ops->ctrl_data |= KXTIK_ENABLE;
else
sensor->ops->ctrl_data &= ~KXTIK_ENABLE;
DBG("%s: second write sensor->ops->ctrl_data = 0x%x\n", __func__, sensor->ops->ctrl_data);
result = sensor_write_reg(client, sensor->ops->ctrl_reg, sensor->ops->ctrl_data);
if(result)
{
printk("%s:line=%d,error\n",__func__,__LINE__);
return result;
}
DBG("%s:%s id=0x%x\n",__func__,sensor->ops->name, id_data);
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 KXTIK_DEVID_1004:
case KXTIK_DEVID_1013:
case KXTIK_DEVID_J9_1005:
case KXTIK_DEVID_J2_1009:
result = (((int)high_byte << 8) | ((int)low_byte ))>>4;
if (result < KXTIK_BOUNDARY)
result = result * KXTIK_GRAVITY_STEP;
else
result = ~(((~result & (0x7fff >> (16 - KXTIK_PRECISION))) + 1)
* KXTIK_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);
/* 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);
/* ?????ػ???????. */
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_kxtik_ops = {
.name = "angle_kxtik",
.type = SENSOR_TYPE_ANGLE, //sensor type and it should be correct
.id_i2c = ANGLE_ID_KXTIK, //i2c id number
.read_reg = KXTIK_XOUT_L, //read data
.read_len = 6, //data length
.id_reg = SENSOR_UNKNOW_DATA, //read device id from this register
.id_data = SENSOR_UNKNOW_DATA,
.precision = KXTIK_PRECISION, //12 bits
.ctrl_reg = KXTIK_CTRL_REG1, //enable or disable
.int_status_reg = KXTIK_INT_REL, //intterupt status register
.range = {-KXTIK_RANGE,KXTIK_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_kxtik_probe(struct i2c_client *client,
const struct i2c_device_id *devid)
{
return sensor_register_device(client, NULL, devid, &angle_kxtik_ops);
}
static int angle_kxtik_remove(struct i2c_client *client)
{
return sensor_unregister_device(client, NULL, &angle_kxtik_ops);
}
static const struct i2c_device_id angle_kxtik_id[] = {
{"angle_kxtik", ANGLE_ID_KXTIK},
{}
};
static struct i2c_driver angle_kxtik_driver = {
.probe = angle_kxtik_probe,
.remove = angle_kxtik_remove,
.shutdown = sensor_shutdown,
.id_table = angle_kxtik_id,
.driver = {
.name = "angle_kxtik",
#ifdef CONFIG_PM
.pm = &sensor_pm_ops,
#endif
},
};
module_i2c_driver(angle_kxtik_driver);
MODULE_AUTHOR("luowei <lw@rock-chips.com>");
MODULE_DESCRIPTION("kxtik angle driver");
MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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