/* drivers/input/sensors/access/kxtj9.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 KXTJ9_DEVID 0x09 //chip id #define KXTJ9_RANGE (2 * 16384) #define KXTJ9_XOUT_HPF_L (0x00) /* 0000 0000 */ #define KXTJ9_XOUT_HPF_H (0x01) /* 0000 0001 */ #define KXTJ9_YOUT_HPF_L (0x02) /* 0000 0010 */ #define KXTJ9_YOUT_HPF_H (0x03) /* 0000 0011 */ #define KXTJ9_ZOUT_HPF_L (0x04) /* 0001 0100 */ #define KXTJ9_ZOUT_HPF_H (0x05) /* 0001 0101 */ #define KXTJ9_XOUT_L (0x06) /* 0000 0110 */ #define KXTJ9_XOUT_H (0x07) /* 0000 0111 */ #define KXTJ9_YOUT_L (0x08) /* 0000 1000 */ #define KXTJ9_YOUT_H (0x09) /* 0000 1001 */ #define KXTJ9_ZOUT_L (0x0A) /* 0001 1010 */ #define KXTJ9_ZOUT_H (0x0B) /* 0001 1011 */ #define KXTJ9_ST_RESP (0x0C) /* 0000 1100 */ #define KXTJ9_WHO_AM_I (0x0F) /* 0000 1111 */ #define KXTJ9_TILT_POS_CUR (0x10) /* 0001 0000 */ #define KXTJ9_TILT_POS_PRE (0x11) /* 0001 0001 */ #define KXTJ9_INT_SRC_REG1 (0x15) /* 0001 0101 */ #define KXTJ9_INT_SRC_REG2 (0x16) /* 0001 0110 */ #define KXTJ9_STATUS_REG (0x18) /* 0001 1000 */ #define KXTJ9_INT_REL (0x1A) /* 0001 1010 */ #define KXTJ9_CTRL_REG1 (0x1B) /* 0001 1011 */ #define KXTJ9_CTRL_REG2 (0x1C) /* 0001 1100 */ #define KXTJ9_CTRL_REG3 (0x1D) /* 0001 1101 */ #define KXTJ9_INT_CTRL_REG1 (0x1E) /* 0001 1110 */ #define KXTJ9_INT_CTRL_REG2 (0x1F) /* 0001 1111 */ #define KXTJ9_INT_CTRL_REG3 (0x20) /* 0010 0000 */ #define KXTJ9_DATA_CTRL_REG (0x21) /* 0010 0001 */ #define KXTJ9_TILT_TIMER (0x28) /* 0010 1000 */ #define KXTJ9_WUF_TIMER (0x29) /* 0010 1001 */ #define KXTJ9_TDT_TIMER (0x2B) /* 0010 1011 */ #define KXTJ9_TDT_H_THRESH (0x2C) /* 0010 1100 */ #define KXTJ9_TDT_L_THRESH (0x2D) /* 0010 1101 */ #define KXTJ9_TDT_TAP_TIMER (0x2E) /* 0010 1110 */ #define KXTJ9_TDT_TOTAL_TIMER (0x2F) /* 0010 1111 */ #define KXTJ9_TDT_LATENCY_TIMER (0x30) /* 0011 0000 */ #define KXTJ9_TDT_WINDOW_TIMER (0x31) /* 0011 0001 */ #define KXTJ9_WUF_THRESH (0x5A) /* 0101 1010 */ #define KXTJ9_TILT_ANGLE (0x5C) /* 0101 1100 */ #define KXTJ9_HYST_SET (0x5F) /* 0101 1111 */ /* CONTROL REGISTER 1 BITS */ #define KXTJ9_DISABLE 0x7F #define KXTJ9_ENABLE (1 << 7) /* 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 KXTJ9_RES_8BIT 0 #define KXTJ9_RES_12BIT (1 << 6) /* Output g-range: +/-2g, 4g, or 8g */ #define KXTJ9_G_2G 0 #define KXTJ9_G_4G (1 << 3) #define KXTJ9_G_8G (1 << 4) /* DATA_CTRL_REG: controls the output data rate of the part */ #define KXTJ9_ODR12_5F 0 #define KXTJ9_ODR25F 1 #define KXTJ9_ODR50F 2 #define KXTJ9_ODR100F 3 #define KXTJ9_ODR200F 4 #define KXTJ9_ODR400F 5 #define KXTJ9_ODR800F 6 /* kxtj9 */ #define KXTJ9_PRECISION 12 #define KXTJ9_BOUNDARY (0x1 << (KXTJ9_PRECISION - 1)) #define KXTJ9_GRAVITY_STEP KXTJ9_RANGE / KXTJ9_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 = KXTJ9_ENABLE; //kxtj9 sensor->ops->ctrl_data |= status; } else { status = ~KXTJ9_ENABLE; //kxtj9 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; 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, KXTJ9_DATA_CTRL_REG, KXTJ9_ODR400F); if(result) { printk("%s:line=%d,error\n",__func__,__LINE__); return result; } if(sensor->pdata->irq_enable) //open interrupt { result = sensor_write_reg(client, KXTJ9_INT_CTRL_REG1, 0x34);//enable int,active high,need read INT_REL if(result) { printk("%s:line=%d,error\n",__func__,__LINE__); return result; } } sensor->ops->ctrl_data = (KXTJ9_RES_12BIT | KXTJ9_G_2G); 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 short sensor_convert_data(struct i2c_client *client, char high_byte, char low_byte) { short result; struct sensor_private_data *sensor = (struct sensor_private_data *) i2c_get_clientdata(client); //int precision = sensor->ops->precision; switch (sensor->devid) { case KXTJ9_DEVID: result = (((short)high_byte << 8) | ((short)low_byte)) >> 4; result *= KXTJ9_GRAVITY_STEP; break; default: printk(KERN_ERR "%s: devid wasn't set correctly\n",__func__); return -EFAULT; } return result; } static int gsensor_report_value(struct i2c_client *client, struct sensor_axis *axis) { struct sensor_private_data *sensor = (struct sensor_private_data *) i2c_get_clientdata(client); if (sensor->status_cur == SENSOR_ON) { /* 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); } 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; short 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 gsensor 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); gsensor_report_value(client, &axis); 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 gsensor_kxtj9_ops = { .name = "kxtj9", .type = SENSOR_TYPE_ACCEL, .id_i2c = ACCEL_ID_KXTJ9, .read_reg = KXTJ9_XOUT_L, .read_len = 6, .id_reg = KXTJ9_WHO_AM_I, .id_data = KXTJ9_DEVID, .precision = KXTJ9_PRECISION, .ctrl_reg = KXTJ9_CTRL_REG1, .int_status_reg = KXTJ9_INT_REL, .range = {-32768, 32768}, .trig = IRQF_TRIGGER_LOW | IRQF_ONESHOT, .active = sensor_active, .init = sensor_init, .report = sensor_report_value, }; /****************operate according to sensor chip:end************/ static int gsensor_kxtj9_probe(struct i2c_client *client, const struct i2c_device_id *devid) { return sensor_register_device(client, NULL, devid, &gsensor_kxtj9_ops); } static int gsensor_kxtj9_remove(struct i2c_client *client) { return sensor_unregister_device(client, NULL, &gsensor_kxtj9_ops); } static const struct i2c_device_id gsensor_kxtj9_id[] = { {"gs_kxtj9", ACCEL_ID_KXTJ9}, {} }; static struct i2c_driver gsensor_kxtj9_driver = { .probe = gsensor_kxtj9_probe, .remove = gsensor_kxtj9_remove, .shutdown = sensor_shutdown, .id_table = gsensor_kxtj9_id, .driver = { .name = "gsensor_kxtj9", #ifdef CONFIG_PM .pm = &sensor_pm_ops, #endif }, }; module_i2c_driver(gsensor_kxtj9_driver); MODULE_AUTHOR("luowei "); MODULE_DESCRIPTION("kxtj9 3-Axis accelerometer driver"); MODULE_LICENSE("GPL");