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 class CompassSensor : public SensorBase {
39 
40 public:
41     CompassSensor();
42     virtual ~CompassSensor();
43 
44     virtual int getFd() const;
45     virtual int enable(int32_t handle, int enabled);
46     virtual int setDelay(int32_t handle, int64_t ns);
47     virtual int getEnable(int32_t handle);
48     virtual int64_t getDelay(int32_t handle);
getMinDelay()49     virtual int64_t getMinDelay() { return -1; } // stub
50 
51     // unnecessary for MPL
readEvents(sensors_event_t * data,int count)52     virtual int readEvents(sensors_event_t *data, int count) { return 0; }
53 
54     int turnOffCompassFifo(void);
55     int turnOnCompassFifo(void);
56     int readSample(long *data, int64_t *timestamp);
providesCalibration()57     int providesCalibration() { return 0; }
58     void getOrientationMatrix(signed char *orient);
59     long getSensitivity();
getAccuracy()60     int getAccuracy() { return 0; }
61     void fillList(struct sensor_t *list);
isIntegrated()62     int isIntegrated() { return (1); }
isYasCompass(void)63     int isYasCompass(void) { return (0); }
checkCoilsReset(void)64     int checkCoilsReset(void) { return(-1); }
65 
66 private:
67     char sensor_name[200];
68     enum CompassBus {
69         COMPASS_BUS_PRIMARY = 0,
70         COMPASS_BUS_SECONDARY = 1
71     } mI2CBus;
72 
73     struct sysfs_attrbs {
74        char *compass_enable;
75        char *compass_fifo_enable;
76        char *compass_x_fifo_enable;
77        char *compass_y_fifo_enable;
78        char *compass_z_fifo_enable;
79        char *compass_rate;
80        char *compass_scale;
81        char *compass_orient;
82     } compassSysFs;
83 
84     // implementation specific
85     signed char mCompassOrientation[9];
86     long mCachedCompassData[3];
87     int compass_fd;
88     int64_t mCompassTimestamp;
89     InputEventCircularReader mCompassInputReader;
90     int64_t mDelay;
91     int mEnable;
92     char *pathP;
93 
94     void processCompassEvent(const input_event *event);
95     int inv_init_sysfs_attributes(void);
96 };
97 
98 /*****************************************************************************/
99 
100 #endif  // COMPASS_SENSOR_H
101