You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
262 lines
6.5 KiB
262 lines
6.5 KiB
/* 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 CONFIG_REG (0x00)
|
|
#define TIM_CTL_REG (0x01)
|
|
#define ALS_CTL_REG (0x02)
|
|
#define INT_STATUS_REG (0x03)
|
|
#define PS_CTL_REG (0x04)
|
|
#define PS_ALS_DATA_REG (0x05)
|
|
#define ALS_WINDOWS_REG (0x08)
|
|
|
|
//enable bit[ 0-1], in register CONFIG_REG
|
|
#define ONLY_ALS_EN (0x00)
|
|
#define ONLY_PROX_EN (0x01)
|
|
#define ALL_PROX_ALS_EN (0x02)
|
|
#define ALL_IDLE (0x03)
|
|
|
|
#define POWER_MODE_MASK (0x0C)
|
|
#define POWER_UP_MODE (0x00)
|
|
#define POWER_DOWN_MODE (0x08)
|
|
#define POWER_RESET_MODE (0x0C)
|
|
|
|
static int sensor_power_updown(struct i2c_client *client, int on)
|
|
{
|
|
int result = 0;
|
|
char value = 0;
|
|
int i = 0;
|
|
for(i=0; i<3; i++)
|
|
{
|
|
if(!on)
|
|
{
|
|
value = sensor_read_reg(client, CONFIG_REG);
|
|
value &= ~POWER_MODE_MASK;
|
|
value |= POWER_DOWN_MODE;
|
|
result = sensor_write_reg(client, CONFIG_REG, value);
|
|
if(result)
|
|
return result;
|
|
}
|
|
else
|
|
{
|
|
value = sensor_read_reg(client, CONFIG_REG);
|
|
value &= ~POWER_MODE_MASK;
|
|
value |= POWER_UP_MODE;
|
|
result = sensor_write_reg(client, CONFIG_REG, value);
|
|
if(result)
|
|
return result;
|
|
}
|
|
|
|
if(!result)
|
|
break;
|
|
}
|
|
|
|
if(i>1)
|
|
printk("%s:set %d times",__func__,i);
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
/****************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;
|
|
char value = 0;
|
|
|
|
if(enable)
|
|
sensor_power_updown(client, 1);
|
|
|
|
value = sensor_read_reg(client, sensor->ops->ctrl_reg);
|
|
|
|
//register setting according to chip datasheet
|
|
if(enable)
|
|
{
|
|
if( (value & 0x03) == ONLY_ALS_EN )
|
|
{
|
|
value &= ~0x03;
|
|
value |= ALL_PROX_ALS_EN;
|
|
}
|
|
else if((value & 0x03) == ALL_IDLE )
|
|
{
|
|
value &= ~0x03;
|
|
value |= ONLY_PROX_EN;
|
|
}
|
|
|
|
}
|
|
else
|
|
{
|
|
if( (value & 0x03) == ONLY_PROX_EN )
|
|
{
|
|
value &= ~0x03;
|
|
value |= ALL_IDLE;
|
|
}
|
|
else if((value & 0x03) == ALL_PROX_ALS_EN )
|
|
{
|
|
value &= ~0x03;
|
|
value |= ONLY_ALS_EN;
|
|
}
|
|
}
|
|
|
|
sensor->ops->ctrl_data = value;
|
|
|
|
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;
|
|
char value = 0;
|
|
|
|
sensor_power_updown(client, 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;
|
|
|
|
value = 0x41;//The ADC effective resolution = 9; Low lux threshold level = 1;
|
|
//value = 0x69; //The ADC effective resolution = 17; Low lux threshold level = 9;
|
|
result = sensor_write_reg(client, ALS_CTL_REG, value);
|
|
if(result)
|
|
{
|
|
printk("%s:line=%d,error\n",__func__,__LINE__);
|
|
return result;
|
|
}
|
|
|
|
//value = 0x04;//0x01-0x0f; 17%->93.5% if value = 0x04,then Compensate Loss 52%
|
|
value = 0x02;//0x01-0x0f; 17%->93.5% if value = 0x02,then Compensate Loss 31%
|
|
result = sensor_write_reg(client, ALS_WINDOWS_REG, value);
|
|
if(result)
|
|
{
|
|
printk("%s:line=%d,error\n",__func__,__LINE__);
|
|
return result;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
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 value = 0;
|
|
|
|
if(sensor->pdata->irq_enable)
|
|
{
|
|
if(sensor->ops->int_status_reg)
|
|
{
|
|
value = sensor_read_reg(client, sensor->ops->int_status_reg);
|
|
}
|
|
|
|
}
|
|
|
|
value = sensor_read_reg(client, sensor->ops->read_reg);
|
|
input_report_abs(sensor->input_dev, ABS_DISTANCE, (value>>7)?0:1);
|
|
input_sync(sensor->input_dev);
|
|
DBG("%s:%s result=0x%x,index=%d\n",__func__,sensor->ops->name, value,(value>>7)?0:1);
|
|
|
|
return result;
|
|
}
|
|
|
|
static struct sensor_operate proximity_al3006_ops = {
|
|
.name = "ps_al3006",
|
|
.type = SENSOR_TYPE_PROXIMITY,//sensor type and it should be correct
|
|
.id_i2c = PROXIMITY_ID_AL3006, //i2c id number
|
|
.read_reg = PS_ALS_DATA_REG, //read data
|
|
.read_len = 1, //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 = CONFIG_REG, //enable or disable
|
|
.int_status_reg = INT_STATUS_REG, //intterupt status register
|
|
.range = {0,10}, //range
|
|
.trig = IRQF_TRIGGER_LOW | IRQF_ONESHOT | IRQF_SHARED,
|
|
.active = sensor_active,
|
|
.init = sensor_init,
|
|
.report = sensor_report_value,
|
|
};
|
|
|
|
/****************operate according to sensor chip:end************/
|
|
static int proximity_al3006_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *devid)
|
|
{
|
|
return sensor_register_device(client, NULL, devid, &proximity_al3006_ops);
|
|
}
|
|
|
|
static int proximity_al3006_remove(struct i2c_client *client)
|
|
{
|
|
return sensor_unregister_device(client, NULL, &proximity_al3006_ops);
|
|
}
|
|
|
|
static const struct i2c_device_id proximity_al3006_id[] = {
|
|
{"proximity_al3006", PROXIMITY_ID_AL3006},
|
|
{}
|
|
};
|
|
|
|
static struct i2c_driver proximity_al3006_driver = {
|
|
.probe = proximity_al3006_probe,
|
|
.remove = proximity_al3006_remove,
|
|
.shutdown = sensor_shutdown,
|
|
.id_table = proximity_al3006_id,
|
|
.driver = {
|
|
.name = "proximity_al3006",
|
|
#ifdef CONFIG_PM
|
|
.pm = &sensor_pm_ops,
|
|
#endif
|
|
},
|
|
};
|
|
|
|
module_i2c_driver(proximity_al3006_driver);
|
|
|
|
MODULE_AUTHOR("luowei <lw@rock-chips.com>");
|
|
MODULE_DESCRIPTION("al3006 proximity driver");
|
|
MODULE_LICENSE("GPL");
|