/* drivers/input/sensors/access/kxtik.c
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*
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* Copyright (C) 2012-2015 ROCKCHIP.
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* Author: luowei <lw@rock-chips.com>
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <linux/interrupt.h>
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#include <linux/i2c.h>
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#include <linux/slab.h>
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#include <linux/irq.h>
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#include <linux/miscdevice.h>
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#include <linux/gpio.h>
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#include <linux/uaccess.h>
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#include <asm/atomic.h>
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#include <linux/delay.h>
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#include <linux/input.h>
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#include <linux/workqueue.h>
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#include <linux/freezer.h>
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#include <linux/of_gpio.h>
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#ifdef CONFIG_HAS_EARLYSUSPEND
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#include <linux/earlysuspend.h>
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#endif
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#include <linux/sensor-dev.h>
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#define CM3217_ADDR_COM1 0x10
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#define CM3217_ADDR_COM2 0x11
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#define CM3217_ADDR_DATA_MSB 0x10
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#define CM3217_ADDR_DATA_LSB 0x11
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#define CM3217_COM1_VALUE 0xA7 // (GAIN1:GAIN0)=10, (IT_T1:IT_TO)=01,WMD=1,SD=1,
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#define CM3217_COM2_VALUE 0xA0 //100ms
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#define CM3217_CLOSE 0x01
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/****************operate according to sensor chip:start************/
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static int sensor_active(struct i2c_client *client, int enable, int rate)
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{
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struct sensor_private_data *sensor =
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(struct sensor_private_data *) i2c_get_clientdata(client);
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int result = 0;
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int status = 0;
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sensor->client->addr = sensor->ops->ctrl_reg;
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sensor->ops->ctrl_data = sensor_read_reg_normal(client);
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//register setting according to chip datasheet
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if(!enable)
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{
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status = CM3217_CLOSE; //cm3217
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sensor->ops->ctrl_data |= status;
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}
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else
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{
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status = ~CM3217_CLOSE; //cm3217
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sensor->ops->ctrl_data &= status;
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}
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DBG("%s:reg=0x%x,reg_ctrl=0x%x,enable=%d\n",__func__,sensor->ops->ctrl_reg, sensor->ops->ctrl_data, enable);
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result = sensor_write_reg_normal(client, sensor->ops->ctrl_data);
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if(result)
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printk("%s:fail to active sensor\n",__func__);
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return result;
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}
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static int sensor_init(struct i2c_client *client)
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{
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struct sensor_private_data *sensor =
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(struct sensor_private_data *) i2c_get_clientdata(client);
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int result = 0;
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result = sensor->ops->active(client,0,0);
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if(result)
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{
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printk("%s:line=%d,error\n",__func__,__LINE__);
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return result;
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}
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sensor->status_cur = SENSOR_OFF;
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sensor->client->addr = sensor->ops->ctrl_reg;
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sensor->ops->ctrl_data = CM3217_COM1_VALUE;
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result = sensor_write_reg_normal(client, sensor->ops->ctrl_data);
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if(result)
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{
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printk("%s:line=%d,error\n",__func__,__LINE__);
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return result;
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}
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sensor->client->addr = CM3217_ADDR_COM2;
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result = sensor_write_reg_normal(client, CM3217_COM2_VALUE);
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if(result)
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{
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printk("%s:line=%d,error\n",__func__,__LINE__);
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return result;
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}
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return result;
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}
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static int light_report_value(struct input_dev *input, int data)
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{
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unsigned char index = 0;
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if(data <= 10){
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index = 0;goto report;
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}
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else if(data <= 160){
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index = 1;goto report;
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}
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else if(data <= 225){
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index = 2;goto report;
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}
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else if(data <= 320){
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index = 3;goto report;
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}
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else if(data <= 640){
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index = 4;goto report;
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}
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else if(data <= 1280){
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index = 5;goto report;
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}
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else if(data <= 2600){
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index = 6;goto report;
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}
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else{
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index = 7;goto report;
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}
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report:
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input_report_abs(input, ABS_MISC, index);
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input_sync(input);
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return index;
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}
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static int sensor_report_value(struct i2c_client *client)
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{
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struct sensor_private_data *sensor =
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(struct sensor_private_data *) i2c_get_clientdata(client);
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int result = 0;
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char msb = 0, lsb = 0;
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int index = 0;
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sensor->client->addr = CM3217_ADDR_DATA_LSB;
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sensor_rx_data_normal(sensor->client, &lsb, 1);
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sensor->client->addr = CM3217_ADDR_DATA_MSB;
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sensor_rx_data_normal(sensor->client, &msb, 1);
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result = ((msb << 8) | lsb) & 0xffff;
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index = light_report_value(sensor->input_dev, result);
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DBG("%s:%s result=0x%x,index=%d\n",__func__,sensor->ops->name, result,index);
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if((sensor->pdata->irq_enable)&& (sensor->ops->int_status_reg >= 0)) //read sensor intterupt status register
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{
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result= sensor_read_reg(client, sensor->ops->int_status_reg);
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if(result)
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{
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printk("%s:fail to clear sensor int status,ret=0x%x\n",__func__,result);
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}
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}
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return result;
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}
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static struct sensor_operate light_cm3217_ops = {
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.name = "cm3217",
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.type = SENSOR_TYPE_LIGHT, //sensor type and it should be correct
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.id_i2c = LIGHT_ID_CM3217, //i2c id number
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.read_reg = CM3217_ADDR_DATA_LSB, //read data
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.read_len = 2, //data length
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.id_reg = SENSOR_UNKNOW_DATA, //read device id from this register
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.id_data = SENSOR_UNKNOW_DATA, //device id
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.precision = 8, //8 bits
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.ctrl_reg = CM3217_ADDR_COM1, //enable or disable
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.int_status_reg = SENSOR_UNKNOW_DATA, //intterupt status register
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.range = {100,65535}, //range
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.brightness ={10,255}, // brightness
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.trig = SENSOR_UNKNOW_DATA,
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.active = sensor_active,
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.init = sensor_init,
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.report = sensor_report_value,
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};
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/****************operate according to sensor chip:end************/
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static int light_cm3217_probe(struct i2c_client *client,
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const struct i2c_device_id *devid)
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{
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return sensor_register_device(client, NULL, devid, &light_cm3217_ops);
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}
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static int light_cm3217_remove(struct i2c_client *client)
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{
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return sensor_unregister_device(client, NULL, &light_cm3217_ops);
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}
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static const struct i2c_device_id light_cm3217_id[] = {
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{"light_cm3217", LIGHT_ID_CM3217},
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{}
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};
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static struct i2c_driver light_cm3217_driver = {
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.probe = light_cm3217_probe,
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.remove = light_cm3217_remove,
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.shutdown = sensor_shutdown,
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.id_table = light_cm3217_id,
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.driver = {
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.name = "light_cm3217",
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#ifdef CONFIG_PM
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.pm = &sensor_pm_ops,
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#endif
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},
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};
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module_i2c_driver(light_cm3217_driver);
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MODULE_AUTHOR("luowei <lw@rock-chips.com>");
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MODULE_DESCRIPTION("cm3217 light driver");
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MODULE_LICENSE("GPL");
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