/* 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>
|
#ifdef CONFIG_HAS_EARLYSUSPEND
|
#include <linux/earlysuspend.h>
|
#endif
|
#include <linux/sensor-dev.h>
|
|
|
#define AP3212B_NUM_CACHABLE_REGS 23
|
#define AP3216C_NUM_CACHABLE_REGS 26
|
|
#define AP3212B_RAN_COMMAND 0x10
|
#define AP3212B_RAN_MASK 0x30
|
#define AP3212B_RAN_SHIFT (4)
|
|
#define AP3212B_MODE_COMMAND 0x00
|
#define AP3212B_MODE_SHIFT (0)
|
#define AP3212B_MODE_MASK 0x07
|
|
#define AP3212B_INT_COMMAND 0x01
|
#define AP3212B_INT_SHIFT (0)
|
#define AP3212B_INT_MASK 0x03
|
#define AP3212B_INT_PMASK 0x02
|
#define AP3212B_INT_AMASK 0x01
|
|
#define AP3212B_OBJ_COMMAND 0x0f
|
#define AP3212B_OBJ_MASK 0x80
|
#define AP3212B_OBJ_SHIFT (7)
|
|
|
/*
|
* register access helpers
|
*/
|
|
static int __ap321xx_read_reg(struct i2c_client *client,
|
u32 reg, u8 mask, u8 shift)
|
{
|
u8 val;
|
|
val = i2c_smbus_read_byte_data(client, reg);
|
return (val & mask) >> shift;
|
}
|
|
static int __ap321xx_write_reg(struct i2c_client *client,
|
u32 reg, u8 mask, u8 shift, u8 val)
|
{
|
int ret = 0;
|
u8 tmp;
|
|
tmp = i2c_smbus_read_byte_data(client, reg);
|
tmp &= ~mask;
|
tmp |= val << shift;
|
|
ret = i2c_smbus_write_byte_data(client, reg, tmp);
|
|
return ret;
|
}
|
|
|
/*
|
* internally used functions
|
*/
|
/* range */
|
static int ap321xx_set_range(struct i2c_client *client, int range)
|
{
|
return __ap321xx_write_reg(client, AP3212B_RAN_COMMAND,
|
AP3212B_RAN_MASK, AP3212B_RAN_SHIFT, range);;
|
}
|
|
|
/* mode */
|
static int ap321xx_get_mode(struct i2c_client *client)
|
{
|
struct sensor_private_data *sensor =
|
(struct sensor_private_data *) i2c_get_clientdata(client);
|
int ret;
|
|
ret = __ap321xx_read_reg(client, sensor->ops->ctrl_reg,
|
AP3212B_MODE_MASK, AP3212B_MODE_SHIFT);
|
return ret;
|
}
|
static int ap321xx_set_mode(struct i2c_client *client, int mode)
|
{
|
struct sensor_private_data *sensor =
|
(struct sensor_private_data *) i2c_get_clientdata(client);
|
int ret;
|
|
ret = __ap321xx_write_reg(client, sensor->ops->ctrl_reg,
|
AP3212B_MODE_MASK, AP3212B_MODE_SHIFT, mode);
|
return ret;
|
}
|
static int ap321xx_get_intstat(struct i2c_client *client)
|
{
|
struct sensor_private_data *sensor =
|
(struct sensor_private_data *) i2c_get_clientdata(client);
|
int val;
|
|
val = i2c_smbus_read_byte_data(client, sensor->ops->int_status_reg);
|
val &= AP3212B_INT_MASK;
|
|
return val >> AP3212B_INT_SHIFT;
|
}
|
|
static int ap321xx_get_object(struct i2c_client *client)
|
{
|
int val;
|
|
val = i2c_smbus_read_byte_data(client, AP3212B_OBJ_COMMAND);
|
val &= AP3212B_OBJ_MASK;
|
|
return val >> AP3212B_OBJ_SHIFT;
|
}
|
|
|
static int ap321xx_product_detect(struct i2c_client *client)
|
{
|
int mid = i2c_smbus_read_byte_data(client, 0x03);
|
int pid = i2c_smbus_read_byte_data(client, 0x04);
|
int rid = i2c_smbus_read_byte_data(client, 0x05);
|
|
if ( mid == 0x01 && pid == 0x01 &&
|
(rid == 0x03 || rid == 0x04) )
|
{
|
//printk("RevID [%d], ==> DA3212 v1.5~1.8 ...... AP3212B detected\n", rid);
|
}
|
else if ( (mid == 0x01 && pid == 0x02 && rid == 0x00) ||
|
(mid == 0x02 && pid == 0x02 && rid == 0x01))
|
{
|
//printk("RevID [%d], ==> DA3212 v2.0 ...... AP3212C/AP3216C detected\n", rid);
|
}
|
else
|
{
|
printk("MakeID[%d] ProductID[%d] RevID[%d] .... can't detect ... bad reversion!!!\n", mid, pid, rid);
|
return -EIO;
|
}
|
|
return 0;
|
}
|
|
static int ap321xx_init_client(struct i2c_client *client)
|
{
|
/* set defaults */
|
ap321xx_set_range(client, 0);
|
ap321xx_set_mode(client, 0);
|
|
return 0;
|
}
|
|
static int ap321xx_psensor_enable(struct i2c_client *client)
|
{
|
int ret = 0,mode;
|
|
mode = ap321xx_get_mode(client);
|
if((mode & 0x02) == 0){
|
mode |= 0x02;
|
ret = ap321xx_set_mode(client,mode);
|
}
|
|
return ret;
|
}
|
|
static int ap321xx_psensor_disable(struct i2c_client *client)
|
{
|
int ret = 0,mode;
|
|
mode = ap321xx_get_mode(client);
|
if(mode & 0x02){
|
mode &= ~0x02;
|
if(mode == 0x04)
|
mode = 0x00;
|
ret = ap321xx_set_mode(client,mode);
|
}
|
return ret;
|
}
|
|
/****************operate according to sensor chip:start************/
|
|
static int sensor_active(struct i2c_client *client, int enable, int rate)
|
{
|
int result = 0;
|
|
//register setting according to chip datasheet
|
if (enable){
|
result = ap321xx_psensor_enable(client);
|
}
|
else
|
result = ap321xx_psensor_disable(client);
|
|
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 = ap321xx_product_detect(client);
|
if (result)
|
{
|
dev_err(&client->dev, "ret: %d, product version detect failed.\n",result);
|
return result;
|
}
|
|
/* initialize the AP3212B chip */
|
result = ap321xx_init_client(client);
|
if (result)
|
return result;
|
|
result = sensor->ops->active(client,0,0);
|
if(result)
|
{
|
printk("%s:line=%d,error\n",__func__,__LINE__);
|
return result;
|
}
|
|
sensor->status_cur = SENSOR_OFF;
|
|
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;
|
u8 int_stat;
|
|
int_stat = ap321xx_get_intstat(client);
|
// ALS int
|
if (int_stat & AP3212B_INT_PMASK)
|
{
|
value = ap321xx_get_object(client);
|
input_report_abs(sensor->input_dev, ABS_DISTANCE, value);
|
input_sync(sensor->input_dev);
|
}
|
|
return result;
|
}
|
|
static struct sensor_operate proximity_ap321xx_ops = {
|
.name = "ps_ap321xx",
|
.type = SENSOR_TYPE_PROXIMITY, //sensor type and it should be correct
|
.id_i2c = PROXIMITY_ID_AP321XX, //i2c id number
|
.read_reg = SENSOR_UNKNOW_DATA, //read data //there are two regs, we fix them in code.
|
.read_len = 1, //data length
|
.id_reg = SENSOR_UNKNOW_DATA, //read device id from this register //there are 3 regs, we fix them in code.
|
.id_data = SENSOR_UNKNOW_DATA, //device id
|
.precision = 8, //8 bits
|
.ctrl_reg = AP3212B_MODE_COMMAND, //enable or disable
|
.int_status_reg = AP3212B_INT_COMMAND, //intterupt status register
|
.range = {0,10}, //range
|
.brightness ={10,255}, // brightness
|
.trig = IRQF_TRIGGER_FALLING | IRQF_ONESHOT | IRQF_SHARED,
|
.active = sensor_active,
|
.init = sensor_init,
|
.report = sensor_report_value,
|
};
|
|
/****************operate according to sensor chip:end************/
|
static int proximity_ap321xx_probe(struct i2c_client *client,
|
const struct i2c_device_id *devid)
|
{
|
return sensor_register_device(client, NULL, devid, &proximity_ap321xx_ops);
|
}
|
|
static int proximity_ap321xx_remove(struct i2c_client *client)
|
{
|
return sensor_unregister_device(client, NULL, &proximity_ap321xx_ops);
|
}
|
|
static const struct i2c_device_id proximity_ap321xx_id[] = {
|
{"ps_ap321xx", PROXIMITY_ID_AP321XX},
|
{}
|
};
|
|
static struct i2c_driver proximity_ap321xx_driver = {
|
.probe = proximity_ap321xx_probe,
|
.remove = proximity_ap321xx_remove,
|
.shutdown = sensor_shutdown,
|
.id_table = proximity_ap321xx_id,
|
.driver = {
|
.name = "proximity_ap321xx",
|
#ifdef CONFIG_PM
|
.pm = &sensor_pm_ops,
|
#endif
|
},
|
};
|
|
module_i2c_driver(proximity_ap321xx_driver);
|
|
MODULE_AUTHOR("luowei <lw@rock-chips.com>");
|
MODULE_DESCRIPTION("ps_ap321xx proximity driver");
|
MODULE_LICENSE("GPL");
|
