1 /* drivers/input/sensors/access/kxtik.c
\r
3 * Copyright (C) 2012-2015 ROCKCHIP.
\r
4 * Author: luowei <lw@rock-chips.com>
\r
6 * This software is licensed under the terms of the GNU General Public
\r
7 * License version 2, as published by the Free Software Foundation, and
\r
8 * may be copied, distributed, and modified under those terms.
\r
10 * This program is distributed in the hope that it will be useful,
\r
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
\r
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
\r
13 * GNU General Public License for more details.
\r
16 #include <linux/interrupt.h>
\r
17 #include <linux/i2c.h>
\r
18 #include <linux/slab.h>
\r
19 #include <linux/irq.h>
\r
20 #include <linux/miscdevice.h>
\r
21 #include <linux/gpio.h>
\r
22 #include <asm/uaccess.h>
\r
23 #include <asm/atomic.h>
\r
24 #include <linux/delay.h>
\r
25 #include <linux/input.h>
\r
26 #include <linux/workqueue.h>
\r
27 #include <linux/freezer.h>
\r
28 #include <linux/of_gpio.h>
\r
29 #ifdef CONFIG_HAS_EARLYSUSPEND
\r
30 #include <linux/earlysuspend.h>
\r
32 #include <linux/l3g4200d.h>
\r
33 #include <linux/sensor-dev.h>
\r
36 #define L3G4200D_ENABLE 0x08
\r
38 /****************operate according to sensor chip:start************/
\r
40 static int sensor_active(struct i2c_client *client, int enable, int rate)
\r
42 struct sensor_private_data *sensor =
\r
43 (struct sensor_private_data *) i2c_get_clientdata(client);
\r
47 sensor->ops->ctrl_data = sensor_read_reg(client, sensor->ops->ctrl_reg);
\r
49 //register setting according to chip datasheet
\r
52 status = L3G4200D_ENABLE; //l3g20d
\r
53 sensor->ops->ctrl_data |= status;
\r
57 status = ~L3G4200D_ENABLE; //l3g20d
\r
58 sensor->ops->ctrl_data &= status;
\r
61 DBG("%s:reg=0x%x,reg_ctrl=0x%x,enable=%d\n",__func__,sensor->ops->ctrl_reg, sensor->ops->ctrl_data, enable);
\r
62 result = sensor_write_reg(client, sensor->ops->ctrl_reg, sensor->ops->ctrl_data);
\r
64 printk("%s:fail to active sensor\n",__func__);
\r
70 static int sensor_init(struct i2c_client *client)
\r
72 struct sensor_private_data *sensor =
\r
73 (struct sensor_private_data *) i2c_get_clientdata(client);
\r
75 unsigned char buf[5];
\r
76 unsigned char data = 0;
\r
79 result = sensor->ops->active(client,0,0);
\r
82 printk("%s:line=%d,error\n",__func__,__LINE__);
\r
86 sensor->status_cur = SENSOR_OFF;
\r
91 buf[3] = 0x20; //0x00
\r
95 result = sensor_write_reg(client, sensor->ops->ctrl_reg+i, buf[i]);
\r
98 printk("%s:line=%d,error\n",__func__,__LINE__);
\r
103 result = sensor_read_reg(client, sensor->ops->ctrl_reg);
\r
105 data = result & 0x000F;
\r
107 sensor->ops->ctrl_data = data + ODR100_BW12_5;
\r
108 result = sensor_write_reg(client, sensor->ops->ctrl_reg, sensor->ops->ctrl_data);
\r
111 printk("%s:line=%d,error\n",__func__,__LINE__);
\r
119 static int gyro_report_value(struct i2c_client *client, struct sensor_axis *axis)
\r
121 struct sensor_private_data *sensor =
\r
122 (struct sensor_private_data *) i2c_get_clientdata(client);
\r
124 /* Report GYRO information */
\r
125 input_report_rel(sensor->input_dev, ABS_RX, axis->x);
\r
126 input_report_rel(sensor->input_dev, ABS_RY, axis->y);
\r
127 input_report_rel(sensor->input_dev, ABS_RZ, axis->z);
\r
128 input_sync(sensor->input_dev);
\r
129 DBG("gyro x==%d y==%d z==%d\n",axis->x,axis->y,axis->z);
\r
134 static int sensor_report_value(struct i2c_client *client)
\r
136 struct sensor_private_data *sensor =
\r
137 (struct sensor_private_data *) i2c_get_clientdata(client);
\r
138 struct sensor_platform_data *pdata = sensor->pdata;
\r
140 int x = 0, y = 0, z = 0;
\r
141 struct sensor_axis axis;
\r
142 char buffer[6] = {0};
\r
146 if(sensor->ops->read_len < 6) //sensor->ops->read_len = 6
\r
148 printk("%s:lenth is error,len=%d\n",__func__,sensor->ops->read_len);
\r
152 memset(buffer, 0, 6);
\r
154 /* Data bytes from hardware xL, xH, yL, yH, zL, zH */
\r
156 buffer[0] = sensor->ops->read_reg;
\r
157 ret = sensor_rx_data(client, buffer, sensor->ops->read_len);
\r
165 //buffer[i] = sensor->ops->read_reg + i;
\r
166 buffer[i] = sensor_read_reg(client, sensor->ops->read_reg + i);
\r
169 x = (short) (((buffer[1]) << 8) | buffer[0]);
\r
170 y = (short) (((buffer[3]) << 8) | buffer[2]);
\r
171 z = (short) (((buffer[5]) << 8) | buffer[4]);
\r
173 DBG("%s: x=%d y=%d z=%d \n",__func__, x,y,z);
174 if(pdata && pdata->orientation)
176 axis.x = (pdata->orientation[0])*x + (pdata->orientation[1])*y + (pdata->orientation[2])*z;
177 axis.y = (pdata->orientation[3])*x + (pdata->orientation[4])*y + (pdata->orientation[5])*z;
178 axis.z = (pdata->orientation[6])*x + (pdata->orientation[7])*y + (pdata->orientation[8])*z;
188 if((abs(axis.x) > pdata->x_min)||(abs(axis.y) > pdata->y_min)||(abs(axis.z) > pdata->z_min))
\r
190 gyro_report_value(client, &axis);
\r
192 /* »¥³âµØ»º´æÊý¾Ý. */
\r
193 mutex_lock(&(sensor->data_mutex) );
\r
194 sensor->axis = axis;
\r
195 mutex_unlock(&(sensor->data_mutex) );
\r
198 if((sensor->pdata->irq_enable)&& (sensor->ops->int_status_reg >= 0)) //read sensor intterupt status register
\r
201 value = sensor_read_reg(client, sensor->ops->int_status_reg);
\r
202 DBG("%s:sensor int status :0x%x\n",__func__,value);
\r
209 static struct sensor_operate gyro_l3g20d_ops = {
\r
211 .type = SENSOR_TYPE_GYROSCOPE,//sensor type and it should be correct
\r
212 .id_i2c = GYRO_ID_L3G20D, //i2c id number
\r
213 .read_reg = GYRO_DATA_REG, //read data
\r
214 .read_len = 6, //data length
\r
215 .id_reg = GYRO_WHO_AM_I, //read device id from this register
\r
216 .id_data = GYRO_DEVID_L3G20D, //device id
\r
217 .precision = 8, //8 bits
\r
218 .ctrl_reg = GYRO_CTRL_REG1, //enable or disable
\r
219 .int_status_reg = GYRO_INT_SRC, //intterupt status register,if no exist then -1
\r
220 .range = {-32768,32768}, //range
\r
221 .trig = IRQF_TRIGGER_LOW|IRQF_ONESHOT,
\r
222 .active = sensor_active,
\r
223 .init = sensor_init,
\r
224 .report = sensor_report_value,
\r
227 /****************operate according to sensor chip:end************/
\r
229 //function name should not be changed
\r
230 static struct sensor_operate *gyro_get_ops(void)
\r
232 return &gyro_l3g20d_ops;
\r
236 static int __init gyro_l3g20d_init(void)
\r
238 struct sensor_operate *ops = gyro_get_ops();
\r
240 int type = ops->type;
\r
241 result = sensor_register_slave(type, NULL, NULL, gyro_get_ops);
\r
245 static void __exit gyro_l3g20d_exit(void)
\r
247 struct sensor_operate *ops = gyro_get_ops();
\r
248 int type = ops->type;
\r
249 sensor_unregister_slave(type, NULL, NULL, gyro_get_ops);
\r
253 module_init(gyro_l3g20d_init);
\r
254 module_exit(gyro_l3g20d_exit);
\r