/* drivers/input/sensors/access/angle_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 KXTIK_DEVID_1004 0x05 //chip id #define KXTIK_DEVID_J9_1005 0x07 //chip id #define KXTIK_DEVID_J2_1009 0x09 //chip id #define KXTIK_DEVID_1013 0x11 //chip id #define KXTIK_RANGE 2000000 #define KXTIK_XOUT_HPF_L (0x00) /* 0000 0000 */ #define KXTIK_XOUT_HPF_H (0x01) /* 0000 0001 */ #define KXTIK_YOUT_HPF_L (0x02) /* 0000 0010 */ #define KXTIK_YOUT_HPF_H (0x03) /* 0000 0011 */ #define KXTIK_ZOUT_HPF_L (0x04) /* 0001 0100 */ #define KXTIK_ZOUT_HPF_H (0x05) /* 0001 0101 */ #define KXTIK_XOUT_L (0x06) /* 0000 0110 */ #define KXTIK_XOUT_H (0x07) /* 0000 0111 */ #define KXTIK_YOUT_L (0x08) /* 0000 1000 */ #define KXTIK_YOUT_H (0x09) /* 0000 1001 */ #define KXTIK_ZOUT_L (0x0A) /* 0001 1010 */ #define KXTIK_ZOUT_H (0x0B) /* 0001 1011 */ #define KXTIK_ST_RESP (0x0C) /* 0000 1100 */ #define KXTIK_WHO_AM_I (0x0F) /* 0000 1111 */ #define KXTIK_TILT_POS_CUR (0x10) /* 0001 0000 */ #define KXTIK_TILT_POS_PRE (0x11) /* 0001 0001 */ #define KXTIK_INT_SRC_REG1 (0x15) /* 0001 0101 */ #define KXTIK_INT_SRC_REG2 (0x16) /* 0001 0110 */ #define KXTIK_STATUS_REG (0x18) /* 0001 1000 */ #define KXTIK_INT_REL (0x1A) /* 0001 1010 */ #define KXTIK_CTRL_REG1 (0x1B) /* 0001 1011 */ #define KXTIK_CTRL_REG2 (0x1C) /* 0001 1100 */ #define KXTIK_CTRL_REG3 (0x1D) /* 0001 1101 */ #define KXTIK_INT_CTRL_REG1 (0x1E) /* 0001 1110 */ #define KXTIK_INT_CTRL_REG2 (0x1F) /* 0001 1111 */ #define KXTIK_INT_CTRL_REG3 (0x20) /* 0010 0000 */ #define KXTIK_DATA_CTRL_REG (0x21) /* 0010 0001 */ #define KXTIK_TILT_TIMER (0x28) /* 0010 1000 */ #define KXTIK_WUF_TIMER (0x29) /* 0010 1001 */ #define KXTIK_TDT_TIMER (0x2B) /* 0010 1011 */ #define KXTIK_TDT_H_THRESH (0x2C) /* 0010 1100 */ #define KXTIK_TDT_L_THRESH (0x2D) /* 0010 1101 */ #define KXTIK_TDT_TAP_TIMER (0x2E) /* 0010 1110 */ #define KXTIK_TDT_TOTAL_TIMER (0x2F) /* 0010 1111 */ #define KXTIK_TDT_LATENCY_TIMER (0x30) /* 0011 0000 */ #define KXTIK_TDT_WINDOW_TIMER (0x31) /* 0011 0001 */ #define KXTIK_WUF_THRESH (0x5A) /* 0101 1010 */ #define KXTIK_TILT_ANGLE (0x5C) /* 0101 1100 */ #define KXTIK_HYST_SET (0x5F) /* 0101 1111 */ /* CONTROL REGISTER 1 BITS */ #define KXTIK_DISABLE 0x7F #define KXTIK_ENABLE (1 << 7) #define KXTIK_DRDYE (1 << 5) /* INPUT_ABS CONSTANTS */ #define FUZZ 3 #define FLAT 3 /* RESUME STATE INDICES */ #define RES_DATA_CTRL 0 #define RES_CTRL_REG1 1 #define RES_INT_CTRL1 2 #define RESUME_ENTRIES 3 /* CTRL_REG1: set resolution, g-range, data ready enable */ /* Output resolution: 8-bit valid or 12-bit valid */ #define KXTIK_RES_8BIT 0 #define KXTIK_RES_12BIT (1 << 6) /* Output g-range: +/-2g, 4g, or 8g */ #define KXTIK_G_2G 0 #define KXTIK_G_4G (1 << 3) #define KXTIK_G_8G (1 << 4) /* DATA_CTRL_REG: controls the output data rate of the part */ #define KXTIK_ODR12_5F 0 #define KXTIK_ODR25F 1 #define KXTIK_ODR50F 2 #define KXTIK_ODR100F 3 #define KXTIK_ODR200F 4 #define KXTIK_ODR400F 5 #define KXTIK_ODR800F 6 /* kxtik */ #define KXTIK_PRECISION 12 #define KXTIK_BOUNDARY (0x1 << (KXTIK_PRECISION - 1)) #define KXTIK_GRAVITY_STEP KXTIK_RANGE / KXTIK_BOUNDARY /****************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 = KXTIK_ENABLE; //kxtik sensor->ops->ctrl_data |= status; } else { status = ~KXTIK_ENABLE; //kxtik 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__); 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; int i = 0; unsigned char id_reg = KXTIK_WHO_AM_I; unsigned char id_data = 0; unsigned char ctrl_data_save = 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; for(i=0; i<3; i++) { result = sensor_rx_data(client, &id_reg, 1); id_data = id_reg; if(!result) break; } if(result) { printk("%s:fail to read id,result=%d\n",__func__, result); return result; } sensor->devid = id_data; result = sensor_write_reg(client, KXTIK_DATA_CTRL_REG, KXTIK_ODR400F); if(result) { printk("%s:line=%d,error\n",__func__,__LINE__); return result; } if(sensor->pdata->irq_enable) //open interrupt { /* BIT 4 IEA sets the polarity of the physical interrupt pin (7) IEA = 0 ? polarity of the physical interrupt pin (7) is active low IEA = 1 ? polarity of the physical interrupt pin (7) is active high BIT 3 IEL sets the response of the physical interrupt pin (7) IEL = 0 ? the physical interrupt pin (7) latches until it is cleared by reading INT_REL IEL = 1 ? the physical interrupt pin (7) will transmit one pulse with a period of 0.03 - 0.05ms */ if (id_data == KXTIK_DEVID_1004) result = sensor_write_reg(client, KXTIK_INT_CTRL_REG1, 0x34);//enable int,active high,need read INT_REL else result = sensor_write_reg(client, KXTIK_INT_CTRL_REG1, 0x28);//enable int,active high,need read INT_REL if(result) { printk("%s:line=%d,error\n",__func__,__LINE__); return result; } } ctrl_data_save = sensor_read_reg(client, sensor->ops->ctrl_reg); DBG("%s: ctrl_data_save = 0x%x\n", __func__, ctrl_data_save); sensor->ops->ctrl_data = (KXTIK_RES_12BIT | KXTIK_G_2G); if(sensor->pdata->irq_enable) { sensor->ops->ctrl_data &= ~KXTIK_ENABLE; sensor->ops->ctrl_data |= KXTIK_DRDYE; } DBG("%s: first write sensor->ops->ctrl_data = 0x%x\n", __func__, sensor->ops->ctrl_data); 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; } if(ctrl_data_save & 0x80) sensor->ops->ctrl_data |= KXTIK_ENABLE; else sensor->ops->ctrl_data &= ~KXTIK_ENABLE; DBG("%s: second write sensor->ops->ctrl_data = 0x%x\n", __func__, sensor->ops->ctrl_data); 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; } DBG("%s:%s id=0x%x\n",__func__,sensor->ops->name, id_data); return result; } static int sensor_convert_data(struct i2c_client *client, char high_byte, char low_byte) { s64 result; struct sensor_private_data *sensor = (struct sensor_private_data *) i2c_get_clientdata(client); /* int precision = sensor->ops->precision; */ switch (sensor->devid) { case KXTIK_DEVID_1004: case KXTIK_DEVID_1013: case KXTIK_DEVID_J9_1005: case KXTIK_DEVID_J2_1009: result = (((int)high_byte << 8) | ((int)low_byte ))>>4; if (result < KXTIK_BOUNDARY) result = result * KXTIK_GRAVITY_STEP; else result = ~(((~result & (0x7fff >> (16 - KXTIK_PRECISION))) + 1) * KXTIK_GRAVITY_STEP) + 1; break; default: printk(KERN_ERR "%s: devid wasn't set correctly\n",__func__); return -EFAULT; } return (int)result; } static int angle_report_value(struct i2c_client *client, struct sensor_axis *axis) { struct sensor_private_data *sensor = (struct sensor_private_data *) i2c_get_clientdata(client); /* Report acceleration sensor information */ input_report_abs(sensor->input_dev, ABS_X, axis->x); input_report_abs(sensor->input_dev, ABS_Y, axis->y); input_report_abs(sensor->input_dev, ABS_Z, axis->z); input_sync(sensor->input_dev); DBG("Gsensor x==%d y==%d z==%d\n",axis->x,axis->y,axis->z); return 0; } #define GSENSOR_MIN 10 static int sensor_report_value(struct i2c_client *client) { struct sensor_private_data *sensor = (struct sensor_private_data *) i2c_get_clientdata(client); struct sensor_platform_data *pdata = sensor->pdata; int ret = 0; int x,y,z; struct sensor_axis axis; char buffer[6] = {0}; char value = 0; if(sensor->ops->read_len < 6) //sensor->ops->read_len = 6 { printk("%s:lenth is error,len=%d\n",__func__,sensor->ops->read_len); return -1; } memset(buffer, 0, 6); /* Data bytes from hardware xL, xH, yL, yH, zL, zH */ do { *buffer = sensor->ops->read_reg; ret = sensor_rx_data(client, buffer, sensor->ops->read_len); if (ret < 0) return ret; } while (0); //this angle need 6 bytes buffer x = sensor_convert_data(sensor->client, buffer[1], buffer[0]); //buffer[1]:high bit y = sensor_convert_data(sensor->client, buffer[3], buffer[2]); z = sensor_convert_data(sensor->client, buffer[5], buffer[4]); axis.x = (pdata->orientation[0])*x + (pdata->orientation[1])*y + (pdata->orientation[2])*z; axis.y = (pdata->orientation[3])*x + (pdata->orientation[4])*y + (pdata->orientation[5])*z; axis.z = (pdata->orientation[6])*x + (pdata->orientation[7])*y + (pdata->orientation[8])*z; DBG( "%s: axis = %d %d %d \n", __func__, axis.x, axis.y, axis.z); //Report event only while value is changed to save some power if((abs(sensor->axis.x - axis.x) > GSENSOR_MIN) || (abs(sensor->axis.y - axis.y) > GSENSOR_MIN) || (abs(sensor->axis.z - axis.z) > GSENSOR_MIN)) { angle_report_value(client, &axis); /* ?????ػ???????. */ mutex_lock(&(sensor->data_mutex) ); sensor->axis = axis; mutex_unlock(&(sensor->data_mutex) ); } if((sensor->pdata->irq_enable)&& (sensor->ops->int_status_reg >= 0)) //read sensor intterupt status register { value = sensor_read_reg(client, sensor->ops->int_status_reg); DBG("%s:sensor int status :0x%x\n",__func__,value); } return ret; } static struct sensor_operate angle_kxtik_ops = { .name = "angle_kxtik", .type = SENSOR_TYPE_ANGLE, //sensor type and it should be correct .id_i2c = ANGLE_ID_KXTIK, //i2c id number .read_reg = KXTIK_XOUT_L, //read data .read_len = 6, //data length .id_reg = SENSOR_UNKNOW_DATA, //read device id from this register .id_data = SENSOR_UNKNOW_DATA, .precision = KXTIK_PRECISION, //12 bits .ctrl_reg = KXTIK_CTRL_REG1, //enable or disable .int_status_reg = KXTIK_INT_REL, //intterupt status register .range = {-KXTIK_RANGE,KXTIK_RANGE}, //range .trig = IRQF_TRIGGER_LOW|IRQF_ONESHOT, .active = sensor_active, .init = sensor_init, .report = sensor_report_value, }; /****************operate according to sensor chip:end************/ static int angle_kxtik_probe(struct i2c_client *client, const struct i2c_device_id *devid) { return sensor_register_device(client, NULL, devid, &angle_kxtik_ops); } static int angle_kxtik_remove(struct i2c_client *client) { return sensor_unregister_device(client, NULL, &angle_kxtik_ops); } static const struct i2c_device_id angle_kxtik_id[] = { {"angle_kxtik", ANGLE_ID_KXTIK}, {} }; static struct i2c_driver angle_kxtik_driver = { .probe = angle_kxtik_probe, .remove = angle_kxtik_remove, .shutdown = sensor_shutdown, .id_table = angle_kxtik_id, .driver = { .name = "angle_kxtik", #ifdef CONFIG_PM .pm = &sensor_pm_ops, #endif }, }; module_i2c_driver(angle_kxtik_driver); MODULE_AUTHOR("luowei "); MODULE_DESCRIPTION("kxtik angle driver"); MODULE_LICENSE("GPL");