/* drivers/input/sensors/access/kxtik.c * * Copyright (C) 2012-2015 Rockchip Electronics Co., Ltd. * Author: luowei * * 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 #include #include #include #include #include #include #include #include #include #include #include #include #ifdef CONFIG_HAS_EARLYSUSPEND #include #endif #include #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; } static 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 void light_cm3217_remove(struct i2c_client *client) { 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 = (void *)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("luowei "); MODULE_DESCRIPTION("cm3217 light driver"); MODULE_LICENSE("GPL");