/* drivers/input/sensors/access/kxtik.c * * Copyright (C) 2012-2015 ROCKCHIP. * 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 ALS_CMD 0x01 #define ALS_DT1 0x02 #define ALS_DT2 0X03 #define ALS_THDH1 0X04 #define ALS_THDH2 0X05 #define ALS_THDL1 0X06 #define ALS_THDL2 0X07 #define STA_TUS 0X08 #define PS_CMD 0X09 #define PS_DT 0X0A #define PS_THDH 0X0B #define PS_THDL 0X0C #define SW_RESET 0X80 //ALS_CMD #define ALS_SD_ENABLE (0<<0) #define ALS_SD_DISABLE (1<<0) #define ALS_INT_DISABLE (0<<1) #define ALS_INT_ENABLE (1<<1) #define ALS_1T_100MS (0<<2) #define ALS_2T_200MS (1<<2) #define ALS_4T_400MS (2<<2) #define ALS_8T_800MS (3<<2) #define ALS_RANGE_57671 (0<<6) #define ALS_RANGE_28836 (1<<6) //PS_CMD #define PS_SD_ENABLE (0<<0) #define PS_SD_DISABLE (1<<0) #define PS_INT_DISABLE (0<<1) #define PS_INT_ENABLE (1<<1) #define PS_10T_2MS (0<<2) #define PS_15T_3MS (1<<2) #define PS_20T_4MS (2<<2) #define PS_25T_5MS (3<<2) #define PS_CUR_100MA (0<<4) #define PS_CUR_200MA (1<<4) #define PS_SLP_10MS (0<<5) #define PS_SLP_30MS (1<<5) #define PS_SLP_90MS (2<<5) #define PS_SLP_270MS (3<<5) #define TRIG_PS_OR_LS (0<<7) #define TRIG_PS_AND_LS (1<<7) //STA_TUS #define STA_PS_INT (1<<5) #define STA_ALS_INT (1<<4) /****************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->ops->ctrl_data = sensor_read_reg(client, sensor->ops->ctrl_reg); //register setting according to chip datasheet if(!enable) { status = PS_SD_DISABLE; sensor->ops->ctrl_data |= status; } else { status = ~PS_SD_DISABLE; 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(client, sensor->ops->ctrl_reg, sensor->ops->ctrl_data); if(result) printk("%s:fail to active sensor\n",__func__); if(enable) sensor->ops->report(sensor->client); 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; result = sensor_write_reg(client, SW_RESET, 0); if(result) { printk("%s:line=%d,error\n",__func__,__LINE__); return result; } sensor->ops->ctrl_data |= PS_15T_3MS| PS_SLP_90MS; sensor->ops->ctrl_data &= ~TRIG_PS_AND_LS; if(sensor->pdata->irq_enable) sensor->ops->ctrl_data |= PS_INT_ENABLE; else sensor->ops->ctrl_data &= ~PS_INT_ENABLE; result = sensor_write_reg(client, sensor->ops->ctrl_reg, sensor->ops->ctrl_data); if(result) { printk("%s:line=%d,error\n",__func__,__LINE__); return result; } 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; int value = 0; char buffer[1] = {0}; if(sensor->ops->read_len < 1) //sensor->ops->read_len = 1 { printk("%s:lenth is error,len=%d\n",__func__,sensor->ops->read_len); return -1; } memset(buffer, 0, 1); buffer[0] = sensor->ops->read_reg; result = sensor_rx_data(client, buffer, sensor->ops->read_len); if(result) { printk("%s:line=%d,error\n",__func__,__LINE__); return result; } value = buffer[0]; input_report_abs(sensor->input_dev, ABS_DISTANCE, (value>>2)?0:1); input_sync(sensor->input_dev); DBG("%s:%s result=0x%x,index=%d\n",__func__,sensor->ops->name, value,(value>>2)?0:1); if(sensor->pdata->irq_enable) { if(sensor->ops->int_status_reg) { value = sensor_read_reg(client, sensor->ops->int_status_reg); } if(value & STA_PS_INT) { value &= ~STA_PS_INT; result = sensor_write_reg(client, sensor->ops->int_status_reg,value); //clear int if(result) { printk("%s:line=%d,error\n",__func__,__LINE__); return result; } } } return result; } static struct sensor_operate proximity_stk3171_ops = { .name = "ps_stk3171", .type = SENSOR_TYPE_PROXIMITY, //sensor type and it should be correct .id_i2c = PROXIMITY_ID_STK3171, //i2c id number .read_reg = PS_DT, //read data .read_len = 1, //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 = PS_CMD, //enable or disable .int_status_reg = STA_TUS, //intterupt status register .range = {0,1}, //range .trig = IRQF_TRIGGER_LOW | IRQF_ONESHOT | IRQF_SHARED, .active = sensor_active, .init = sensor_init, .report = sensor_report_value, }; /****************operate according to sensor chip:end************/ static int proximity_stk3171_probe(struct i2c_client *client, const struct i2c_device_id *devid) { return sensor_register_device(client, NULL, devid, &proximity_stk3171_ops); } static int proximity_stk3171_remove(struct i2c_client *client) { return sensor_unregister_device(client, NULL, &proximity_stk3171_ops); } static const struct i2c_device_id proximity_stk3171_id[] = { {"ps_stk3171", PROXIMITY_ID_STK3171}, {} }; static struct i2c_driver proximity_stk3171_driver = { .probe = proximity_stk3171_probe, .remove = proximity_stk3171_remove, .shutdown = sensor_shutdown, .id_table = proximity_stk3171_id, .driver = { .name = "proximity_stk3171", #ifdef CONFIG_PM .pm = &sensor_pm_ops, #endif }, }; module_i2c_driver(proximity_stk3171_driver); MODULE_AUTHOR("luowei "); MODULE_DESCRIPTION("ps_stk3171 proximity driver"); MODULE_LICENSE("GPL");