/* drivers/input/sensors/access/kxtik.c * * Copyright (C) 2012-2015 ROCKCHIP. * Author: Bruins * * 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 LSM303D_WHO_AM_I (0x0F) /* full scale setting - register & mask */ #define LSM303D_CTRL_REG0 (0x1F) #define LSM303D_CTRL_REG1 (0x20) #define LSM303D_CTRL_REG2 (0x21) #define LSM303D_CTRL_REG3 (0x22) #define LSM303D_CTRL_REG4 (0x23) #define LSM303D_CTRL_REG5 (0x24) #define LSM303D_CTRL_REG6 (0x25) #define LSM303D_CTRL_REG7 (0x26) #define LSM303D_STATUS_REG (0x27) #define LSM303D_OUT_X_L (0x28) #define LSM303D_OUT_X_H (0x29) #define LSM303D_OUT_Y_L (0x2a) #define LSM303D_OUT_Y_H (0x2b) #define LSM303D_OUT_Z_L (0x2c) #define LSM303D_OUT_Z_H (0x2d) #define LSM303D_FIFO_CTRL_REG (0x2E) #define LSM303D_FIFO_SRC_REG (0X2F) #define LSM303D_IG_CFG1 (0x30) #define LSM303D_IG_SRC1 (0x31) #define LSM303D_IG_THS1 (0x32) #define LSM303D_IG_DURATION1 (0x33) #define LSM303D_IG_CFG2 (0x34) #define LSM303D_IG_SRC2 (0x35) #define LSM303D_IG_THS2 (0x36) #define LSM303D_IG_DURATION2 (0x37) #define LSM303D_DEVID (0x49) //chip id #define LSM303D_ACC_DISABLE (0x08) #define LSM303D_RANGE 32768 /* LSM303D */ #define LSM303D_PRECISION 16 #define LSM303D_BOUNDARY (0x1 << (LSM303D_PRECISION - 1)) #define LSM303D_GRAVITY_STEP (LSM303D_RANGE / LSM303D_BOUNDARY) #define ODR3P25 0x10 /* 3.25Hz output data rate */ #define ODR6P25 0x20 /* 6.25Hz output data rate */ #define ODR12P5 0x30 /* 12.5Hz output data rate */ #define ODR25 0x40 /* 25Hz output data rate */ #define ODR50 0x50 /* 50Hz output data rate */ #define ODR100 0x60 /* 100Hz output data rate */ #define ODR200 0x70 /* 200Hz output data rate */ #define ODR400 0x80 /* 400Hz output data rate */ #define ODR800 0x90 /* 800Hz output data rate */ #define ODR1600 0xA0 /* 1600Hz output data rate */ struct sensor_reg_data { char reg; char data; }; /****************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); sensor->ops->ctrl_data |= ODR100; //100HZ,if 0 then power down //register setting according to chip datasheet if(!enable) { status = LSM303D_ACC_DISABLE; //lis3dh sensor->ops->ctrl_data |= status; } else { status = ~LSM303D_ACC_DISABLE; //lis3dh 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; struct sensor_reg_data reg_data[] = { {LSM303D_CTRL_REG0,0x00}, {LSM303D_CTRL_REG1,0x07}, {LSM303D_CTRL_REG2,0x00}, {LSM303D_CTRL_REG3,0x00}, {LSM303D_CTRL_REG4,0x00}, {LSM303D_CTRL_REG5,0x78}, //High resolution output mode:11, {LSM303D_CTRL_REG6,0x20}, {LSM303D_CTRL_REG7,0x00}, {LSM303D_FIFO_CTRL_REG,0x00}, {LSM303D_IG_CFG1,0xFF}, //6 direction position recognition {LSM303D_IG_THS1,0x7F}, //Interrupt 1 threshold {LSM303D_IG_DURATION1,0x7F}, //Duration value 0x00->ox7f /* {LSM303D_CTRL_REG7,0x00}, {LSM303D_CTRL_REG4,0x08}, //High resolution output mode: 1, Normal mode {LSM303D_CTRL_REG6,0x40}, {LSM303D_FIFO_CTRL_REG,0x00}, // {LSM303D_IG_CFG1,0xFF}, //6 direction position recognition {LSM303D_IG_THS1,0x7F}, //Interrupt 1 threshold {LSM303D_IG_DURATION1,0x7F}, //Duration value 0x00->ox7f */ }; 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<(sizeof(reg_data)/sizeof(struct sensor_reg_data));i++) { result = sensor_write_reg(client, reg_data[i].reg, reg_data[i].data); if(result) { printk("%s:line=%d,i=%d,error\n",__func__,__LINE__,i); return result; } } if(sensor->pdata->irq_enable) { result = sensor_write_reg(client, LSM303D_CTRL_REG3, 0x20); if(result) { printk("%s:line=%d,error\n",__func__,__LINE__); return result; } i = sensor_read_reg(client,LSM303D_CTRL_REG5); result = sensor_write_reg(client, LSM303D_CTRL_REG5, (i|0x01)); if(result) { printk("%s:line=%d,error\n",__func__,__LINE__); return result; } } return result; } static int sensor_convert_data(struct i2c_client *client, char high_byte, char low_byte) { int result; struct sensor_private_data *sensor = (struct sensor_private_data *) i2c_get_clientdata(client); switch (sensor->devid) { case LSM303D_DEVID: result = ((int)high_byte << 8) | (int)low_byte; if (result < LSM303D_BOUNDARY) result = result * LSM303D_GRAVITY_STEP; else result = ~(((~result & (0x7fff >> (16 - LSM303D_PRECISION))) + 1) * LSM303D_GRAVITY_STEP) + 1; break; default: printk(KERN_ERR "%s: devid wasn't set correctly\n",__func__); return -EFAULT; } return (int)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; 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); value = sensor_read_reg(client, LSM303D_STATUS_REG); if((value & 0x0f) == 0) { printk("%s:line=%d,value=0x%x,data is not ready\n",__func__,__LINE__,value); return -1; } /* 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; 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_lsm303d_ops = { .name = "lsm303d", .type = SENSOR_TYPE_ACCEL, .id_i2c = ACCEL_ID_LSM303D, .read_reg = (LSM303D_OUT_X_L | 0x80), .read_len = 6, .id_reg = LSM303D_WHO_AM_I, .id_data = LSM303D_DEVID, .precision = LSM303D_PRECISION, .ctrl_reg = LSM303D_CTRL_REG1, .int_status_reg = LSM303D_IG_SRC1, .range = {-LSM303D_RANGE, LSM303D_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 gsensor_lsm303d_probe(struct i2c_client *client, const struct i2c_device_id *devid) { return sensor_register_device(client, NULL, devid, &gsensor_lsm303d_ops); } static int gsensor_lsm303d_remove(struct i2c_client *client) { return sensor_unregister_device(client, NULL, &gsensor_lsm303d_ops); } static const struct i2c_device_id gsensor_lsm303d_id[] = { {"gs_lsm303d", ACCEL_ID_LSM303D}, {} }; static struct i2c_driver gsensor_lsm303d_driver = { .probe = gsensor_lsm303d_probe, .remove = gsensor_lsm303d_remove, .shutdown = sensor_shutdown, .id_table = gsensor_lsm303d_id, .driver = { .name = "gsensor_lsm303d", #ifdef CONFIG_PM .pm = &sensor_pm_ops, #endif }, }; module_i2c_driver(gsensor_lsm303d_driver); MODULE_AUTHOR("xwj "); MODULE_DESCRIPTION("lsm303d 3-Axis accelerometer driver"); MODULE_LICENSE("GPL");