1 /*
2  * Copyright (C) 2014 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #ifndef COMPASS_SENSOR_H
18 #define COMPASS_SENSOR_H
19 
20 #include <stdint.h>
21 #include <errno.h>
22 #include <sys/cdefs.h>
23 #include <sys/types.h>
24 
25 // TODO fixme, need input_event
26 #include <stdint.h>
27 #include <errno.h>
28 #include <sys/cdefs.h>
29 #include <sys/types.h>
30 #include <poll.h>
31 #include <utils/Vector.h>
32 #include <utils/KeyedVector.h>
33 
34 #include "sensors.h"
35 #include "SensorBase.h"
36 #include "InputEventReader.h"
37 
38 #define MAX_CHIP_ID_LEN (20)
39 #define COMPASS_ON_PRIMARY "in_magn_x_raw"
40 
41 class CompassSensor : public SensorBase {
42 
43 public:
44     CompassSensor();
45     virtual ~CompassSensor();
46 
47     virtual int getFd() const;
48     virtual int enable(int32_t handle, int enabled);
49     virtual int setDelay(int32_t handle, int64_t ns);
50     virtual int getEnable(int32_t handle);
51     virtual int64_t getDelay(int32_t handle);
getMinDelay()52     virtual int64_t getMinDelay() { return mMinDelay; }
53 
54     // unnecessary for MPL
readEvents(sensors_event_t * data,int count)55     virtual int readEvents(sensors_event_t *data, int count) { return 0; }
56 
57     int readSample(long *data, int64_t *timestamp);
58     int readRawSample(float *data, int64_t *timestamp);
providesCalibration()59     int providesCalibration() { return 0; }
60     void getOrientationMatrix(signed char *orient);
61     long getSensitivity();
getAccuracy()62     int getAccuracy() { return 0; }
63     void fillList(struct sensor_t *list);
isIntegrated()64     int isIntegrated() { return (0); }
65     int checkCoilsReset(void);
66     int isYasCompass(void);
67 
68 private:
69     enum CompassBus {
70         COMPASS_BUS_PRIMARY = 0,
71         COMPASS_BUS_SECONDARY = 1
72     } mI2CBus;
73 
74     struct sysfs_attrbs {
75        char *chip_enable;
76        char *in_timestamp_en;
77        char *buffer_length;
78 
79        char *compass_enable;
80        char *compass_x_fifo_enable;
81        char *compass_y_fifo_enable;
82        char *compass_z_fifo_enable;
83        char *compass_rate;
84        char *compass_scale;
85        char *compass_orient;
86        char *compass_attr_1;
87     } compassSysFs;
88 
89     char dev_full_name[20];
90 
91     // implementation specific
92     signed char mCompassOrientation[9];
93     long mCachedCompassData[3];
94     int64_t mCompassTimestamp;
95     InputEventCircularReader mCompassInputReader;
96     int compass_fd;
97     int64_t mDelay;
98     int64_t mMinDelay;
99     int mEnable;
100     char *pathP;
101 
102     char mIIOBuffer[(8 + 8) * IIO_BUFFER_LENGTH];
103 
104     int masterEnable(int en);
105     void enable_iio_sysfs(void);
106     void processCompassEvent(const input_event *event);
107     int inv_init_sysfs_attributes(void);
108     FILE *mCoilsResetFd;
109     bool mYasCompass;
110 };
111 
112 /*****************************************************************************/
113 
114 #endif  // COMPASS_SENSOR_H
115