/* drivers/input/sensors/access/kxtik.c
*
* Copyright (C) 2012-2015 ROCKCHIP.
*
* 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 CM3217_ADDR_COM1 0x10
#define CM3217_ADDR_COM2 0x11
#define CM3217_ADDR_DATA_MSB 0x10
#define CM3217_ADDR_DATA_LSB 0x11
#define CM3217_COM1_VALUE 0xA7 // (GAIN1:GAIN0)=10, (IT_T1:IT_TO)=01,WMD=1,SD=1,
#define CM3217_COM2_VALUE 0xA0 //100ms
#define CM3217_CLOSE 0x01
/****************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->client->addr = sensor->ops->ctrl_reg;
sensor->ops->ctrl_data = sensor_read_reg_normal(client);
//register setting according to chip datasheet
if(!enable)
{
status = CM3217_CLOSE; //cm3217
sensor->ops->ctrl_data |= status;
}
else
{
status = ~CM3217_CLOSE; //cm3217
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_normal(client, 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;
result = sensor->ops->active(client,0,0);
if(result)
{
printk("%s:line=%d,error\n",__func__,__LINE__);
return result;
}
sensor->status_cur = SENSOR_OFF;
sensor->client->addr = sensor->ops->ctrl_reg;
sensor->ops->ctrl_data = CM3217_COM1_VALUE;
result = sensor_write_reg_normal(client, sensor->ops->ctrl_data);
if(result)
{
printk("%s:line=%d,error\n",__func__,__LINE__);
return result;
}
sensor->client->addr = CM3217_ADDR_COM2;
result = sensor_write_reg_normal(client, CM3217_COM2_VALUE);
if(result)
{
printk("%s:line=%d,error\n",__func__,__LINE__);
return result;
}
return result;
}
static int light_report_value(struct input_dev *input, int data)
{
unsigned char index = 0;
if(data <= 10){
index = 0;goto report;
}
else if(data <= 160){
index = 1;goto report;
}
else if(data <= 225){
index = 2;goto report;
}
else if(data <= 320){
index = 3;goto report;
}
else if(data <= 640){
index = 4;goto report;
}
else if(data <= 1280){
index = 5;goto report;
}
else if(data <= 2600){
index = 6;goto report;
}
else{
index = 7;goto report;
}
report:
input_report_abs(input, ABS_MISC, index);
input_sync(input);
return index;
}
static int sensor_report_value(struct i2c_client *client)
{
struct sensor_private_data *sensor =
(struct sensor_private_data *) i2c_get_clientdata(client);
int result = 0;
char msb = 0, lsb = 0;
int index = 0;
sensor->client->addr = CM3217_ADDR_DATA_LSB;
sensor_rx_data_normal(sensor->client, &lsb, 1);
sensor->client->addr = CM3217_ADDR_DATA_MSB;
sensor_rx_data_normal(sensor->client, &msb, 1);
result = ((msb << 8) | lsb) & 0xffff;
index = light_report_value(sensor->input_dev, result);
DBG("%s:%s result=0x%x,index=%d\n",__func__,sensor->ops->name, result,index);
if((sensor->pdata->irq_enable)&& (sensor->ops->int_status_reg >= 0)) //read sensor intterupt status register
{
result= sensor_read_reg(client, sensor->ops->int_status_reg);
if(result)
{
printk("%s:fail to clear sensor int status,ret=0x%x\n",__func__,result);
}
}
return result;
}
struct sensor_operate light_cm3217_ops = {
.name = "cm3217",
.type = SENSOR_TYPE_LIGHT, //sensor type and it should be correct
.id_i2c = LIGHT_ID_CM3217, //i2c id number
.read_reg = CM3217_ADDR_DATA_LSB, //read data
.read_len = 2, //data length
.id_reg = SENSOR_UNKNOW_DATA, //read device id from this register
.id_data = SENSOR_UNKNOW_DATA, //device id
.precision = 8, //8 bits
.ctrl_reg = CM3217_ADDR_COM1, //enable or disable
.int_status_reg = SENSOR_UNKNOW_DATA, //intterupt status register
.range = {100,65535}, //range
.brightness ={10,255}, // brightness
.trig = SENSOR_UNKNOW_DATA,
.active = sensor_active,
.init = sensor_init,
.report = sensor_report_value,
};
/****************operate according to sensor chip:end************/
static int light_cm3217_probe(struct i2c_client *client,
const struct i2c_device_id *devid)
{
return sensor_register_device(client, NULL, devid, &light_cm3217_ops);
}
static int light_cm3217_remove(struct i2c_client *client)
{
return sensor_unregister_device(client, NULL, &light_cm3217_ops);
}
static const struct i2c_device_id light_cm3217_id[] = {
{"light_cm3217", LIGHT_ID_CM3217},
{}
};
static struct i2c_driver light_cm3217_driver = {
.probe = light_cm3217_probe,
.remove = light_cm3217_remove,
.shutdown = sensor_shutdown,
.id_table = light_cm3217_id,
.driver = {
.name = "light_cm3217",
#ifdef CONFIG_PM
.pm = &sensor_pm_ops,
#endif
},
};
module_i2c_driver(light_cm3217_driver);
MODULE_AUTHOR("XXX ");
MODULE_DESCRIPTION("cm3217 light driver");
MODULE_LICENSE("GPL");