/* 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 CM3232_CLOSE 0x01 #define CM3232_ADDR_COM 0 #define CM3232_ADDR_DATA 50 #define CM3232_DRV_NAME "cm3232" //command code #define COMMAND_CTRL 0 #define COMMAND_ALS_DATA 50 //ALS: 15:8 MSB 8bits data //7:0 LSB 8bits data //ctrl bit #define ALS_RESET(x) (((x)&1)<<6) //0 = Reset disable; 1 = Reset enable #define ALS_IT(x) (((x)&7)<<2) //ALS integration time setting #define HIGH_SENSITIVITY(x) (((x)&1)<<1) //0 = Normal mode; 1 = High sensitivity mode #define SHUT_DOWN(x) (((x)&1)<<0) //ALS shut down setting: 0 = ALS Power on ; 1 = ALS Shut down #define ALS_IT100MS 0 //100ms #define ALS_IT200MS 1 //200ms #define ALS_IT400MS 2 //400ms #define ALS_IT800MS 3 //800ms #define ALS_IT1600MS 4 //1600ms #define ALS_IT3200MS 5 //3200ms /****************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(client, sensor->ops->ctrl_reg); //printk("%s: client addr = %#x\n\n", __func__, client->addr); //register setting according to chip datasheet if (enable) { sensor->ops->ctrl_data = ALS_RESET(1); result = sensor_write_reg(client, sensor->ops->ctrl_reg, sensor->ops->ctrl_data); if(result) { printk("%s:fail to active sensor\n",__func__); return -1; } } if(enable) { sensor->ops->ctrl_data = ALS_IT(ALS_IT200MS) | HIGH_SENSITIVITY(1); } else { sensor->ops->ctrl_data = SHUT_DOWN(1); } 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; 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 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; char data[2] = {0}; unsigned short value = 0; int index = 0; //sensor->client->addr = CM3232_ADDR_DATA; data[0] = CM3232_ADDR_DATA; sensor_rx_data(sensor->client, data, 2); value = (data[1] << 8) | data[0] ; DBG("%s:result=%d\n",__func__,value); //printk("%s:result=%d\n",__func__,value); index = light_report_value(sensor->input_dev, value); DBG("%s:%s result=0x%x,index=%d\n",__func__,sensor->ops->name, value,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_cm3232_ops = { .name = "cm3232", .type = SENSOR_TYPE_LIGHT, //sensor type and it should be correct .id_i2c = LIGHT_ID_CM3232, //i2c id number .read_reg = CM3232_ADDR_DATA, //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 = CM3232_ADDR_COM, //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_cm3232_probe(struct i2c_client *client, const struct i2c_device_id *devid) { return sensor_register_device(client, NULL, devid, &light_cm3232_ops); } static void light_cm3232_remove(struct i2c_client *client) { sensor_unregister_device(client, NULL, &light_cm3232_ops); } static const struct i2c_device_id light_cm3232_id[] = { {"light_cm3232", LIGHT_ID_CM3232}, {} }; static struct i2c_driver light_cm3232_driver = { .probe = light_cm3232_probe, .remove = (void *)light_cm3232_remove, .shutdown = sensor_shutdown, .id_table = light_cm3232_id, .driver = { .name = "light_cm3232", #ifdef CONFIG_PM .pm = &sensor_pm_ops, #endif }, }; module_i2c_driver(light_cm3232_driver); MODULE_AUTHOR("luowei "); MODULE_DESCRIPTION("cm3232 light driver"); MODULE_LICENSE("GPL");