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
41class CompassSensor : public SensorBase {
42
43public:
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);
52    virtual int64_t getMinDelay() { return mMinDelay; }
53
54    // unnecessary for MPL
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);
59    int providesCalibration() { return 0; }
60    void getOrientationMatrix(signed char *orient);
61    long getSensitivity();
62    int getAccuracy() { return 0; }
63    void fillList(struct sensor_t *list);
64    int isIntegrated() { return (0); }
65    int checkCoilsReset(void);
66    int isYasCompass(void);
67
68private:
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