/* 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 CM3232_CLOSE 0x01
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#define CM3232_ADDR_COM 0
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#define CM3232_ADDR_DATA 50
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#define CM3232_DRV_NAME "cm3232"
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//command code
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#define COMMAND_CTRL 0
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#define COMMAND_ALS_DATA 50 //ALS: 15:8 MSB 8bits data
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//7:0 LSB 8bits data
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//ctrl bit
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#define ALS_RESET(x) (((x)&1)<<6) //0 = Reset disable; 1 = Reset enable
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#define ALS_IT(x) (((x)&7)<<2) //ALS integration time setting
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#define HIGH_SENSITIVITY(x) (((x)&1)<<1) //0 = Normal mode; 1 = High sensitivity mode
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#define SHUT_DOWN(x) (((x)&1)<<0) //ALS shut down setting: 0 = ALS Power on ; 1 = ALS Shut down
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#define ALS_IT100MS 0 //100ms
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#define ALS_IT200MS 1 //200ms
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#define ALS_IT400MS 2 //400ms
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#define ALS_IT800MS 3 //800ms
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#define ALS_IT1600MS 4 //1600ms
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#define ALS_IT3200MS 5 //3200ms
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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(client, sensor->ops->ctrl_reg);
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//printk("%s: client addr = %#x\n\n", __func__, client->addr);
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//register setting according to chip datasheet
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if (enable) {
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sensor->ops->ctrl_data = ALS_RESET(1);
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result = sensor_write_reg(client, sensor->ops->ctrl_reg, 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 -1;
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}
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}
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if(enable)
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{
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sensor->ops->ctrl_data = ALS_IT(ALS_IT200MS) | HIGH_SENSITIVITY(1);
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}
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else
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{
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sensor->ops->ctrl_data = SHUT_DOWN(1);
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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(client, sensor->ops->ctrl_reg, 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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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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char data[2] = {0};
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unsigned short value = 0;
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int index = 0;
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//sensor->client->addr = CM3232_ADDR_DATA;
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data[0] = CM3232_ADDR_DATA;
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sensor_rx_data(sensor->client, data, 2);
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value = (data[1] << 8) | data[0] ;
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DBG("%s:result=%d\n",__func__,value);
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//printk("%s:result=%d\n",__func__,value);
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index = light_report_value(sensor->input_dev, value);
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DBG("%s:%s result=0x%x,index=%d\n",__func__,sensor->ops->name, value,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_cm3232_ops = {
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.name = "cm3232",
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.type = SENSOR_TYPE_LIGHT, //sensor type and it should be correct
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.id_i2c = LIGHT_ID_CM3232, //i2c id number
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.read_reg = CM3232_ADDR_DATA, //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 = CM3232_ADDR_COM, //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_cm3232_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_cm3232_ops);
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}
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static int light_cm3232_remove(struct i2c_client *client)
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{
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return sensor_unregister_device(client, NULL, &light_cm3232_ops);
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}
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static const struct i2c_device_id light_cm3232_id[] = {
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{"light_cm3232", LIGHT_ID_CM3232},
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{}
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};
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static struct i2c_driver light_cm3232_driver = {
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.probe = light_cm3232_probe,
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.remove = light_cm3232_remove,
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.shutdown = sensor_shutdown,
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.id_table = light_cm3232_id,
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.driver = {
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.name = "light_cm3232",
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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_cm3232_driver);
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MODULE_AUTHOR("luowei <lw@rock-chips.com>");
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MODULE_DESCRIPTION("cm3232 light driver");
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MODULE_LICENSE("GPL");
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