1/*
2* Copyright (C) 2014 Invensense, Inc.
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 ANDROID_SENSOR_BASE_H
18#define ANDROID_SENSOR_BASE_H
19
20#include <stdint.h>
21#include <errno.h>
22#include <sys/cdefs.h>
23#include <sys/types.h>
24
25#if defined ANDROID_JELLYBEAN || defined ANDROID_KITKAT
26//build for Jellybean or KitKat
27#define LOGV_IF ALOGV_IF
28#define LOGE_IF ALOGE_IF
29#define LOGI_IF ALOGI_IF
30#define LOGI    ALOGI
31#define LOGE    ALOGE
32#define LOGV    ALOGV
33#define LOGW    ALOGW
34#else
35//build for ICS or earlier version
36#endif
37
38#define FUNC_LOG \
39            LOGV("%s", __PRETTY_FUNCTION__)
40#define VFUNC_LOG \
41            LOGV_IF(SensorBase::FUNC_ENTRY, \
42                    "Entering function '%s'", __PRETTY_FUNCTION__)
43#define VHANDLER_LOG \
44            LOGV_IF(SensorBase::HANDLER_ENTRY, \
45                    "Entering handler '%s'", __PRETTY_FUNCTION__)
46#define CALL_MEMBER_FN(pobject, ptrToMember) ((pobject)->*(ptrToMember))
47
48#define MAX_SYSFS_NAME_LEN  (100)
49#define IIO_BUFFER_LENGTH   (480)
50
51/*****************************************************************************/
52
53struct sensors_event_t;
54
55class SensorBase {
56public:
57    /* Log enablers, each of these independent */
58    static bool PROCESS_VERBOSE;   /* process log messages */
59    static bool EXTRA_VERBOSE;     /* verbose log messages */
60    static bool SYSFS_VERBOSE;     /* log sysfs interactions as cat/echo for
61                                      repro purpose on a shell */
62    /* Note that enabling this logs may affect performance */
63    static bool FUNC_ENTRY;        /* log entry in all one-time functions */
64    static bool HANDLER_ENTRY;     /* log entry in all handler functions */
65    static bool ENG_VERBOSE;       /* log a lot more info about the internals */
66    static bool INPUT_DATA;        /* log the data input from the events */
67    static bool HANDLER_DATA;      /* log the data fetched from the handlers */
68    static bool DEBUG_BATCHING;    /* log the data for debugging batching */
69
70protected:
71    const char *dev_name;
72    const char *data_name;
73    char input_name[PATH_MAX];
74    int dev_fd;
75    int data_fd;
76
77    int openInput(const char* inputName);
78    static int64_t getTimestamp();
79    static int64_t timevalToNano(timeval const& t) {
80        return t.tv_sec * 1000000000LL + t.tv_usec * 1000;
81    }
82
83    int open_device();
84    int close_device();
85
86public:
87    SensorBase(const char* dev_name, const char* data_name);
88    virtual ~SensorBase();
89
90    virtual int readEvents(sensors_event_t* data, int count) = 0;
91    int readSample(long *data, int64_t *timestamp);
92    int readRawSample(float *data, int64_t *timestamp);
93    virtual bool hasPendingEvents() const;
94    virtual int getFd() const;
95    virtual int setDelay(int32_t handle, int64_t ns);
96    virtual int enable(int32_t handle, int enabled);
97    virtual int query(int what, int* value);
98    virtual int batch(int handle, int flags, int64_t period_ns, int64_t timeout);
99    virtual int flush(int handle);
100};
101
102/*****************************************************************************/
103
104#endif  // ANDROID_SENSOR_BASE_H
105