summaryrefslogtreecommitdiffstats
path: root/nci/jni/Pn544Interop.cpp
blob: be92c75aa40a7c4e2d939be289ecb9608d0b220e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
/*
 * Copyright (C) 2012 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/*****************************************************************************
**
**  Name:           Pn544Interop.cpp
**
**  Description:    Implement operations that provide compatibility with NXP
**                  PN544 controller.  Specifically facilitate peer-to-peer
**                  operations with PN544 controller.
**
*****************************************************************************/
#include "OverrideLog.h"
#include "Pn544Interop.h"
#include "IntervalTimer.h"
#include "Mutex.h"
#include "NfcTag.h"
namespace android
{
    extern void startStopPolling (bool isStartPolling);
}


/*****************************************************************************
**
** private variables and functions
**
*****************************************************************************/


static const int gIntervalTime = 1000; //millisecond between the check to restore polling
static IntervalTimer gTimer;
static Mutex gMutex;
static void pn544InteropStartPolling (union sigval); //callback function for interval timer
static bool gIsBusy = false; //is timer busy?
static bool gAbortNow = false; //stop timer during next callback


/*******************************************************************************
**
** Function:        pn544InteropStopPolling
**
** Description:     Stop polling to let NXP PN544 controller poll.
**                  PN544 should activate in P2P mode.
**
** Returns:         None
**
*******************************************************************************/
void pn544InteropStopPolling ()
{
    ALOGD ("%s: enter", __FUNCTION__);
    gMutex.lock ();
    gTimer.kill ();
    android::startStopPolling (false);
    gIsBusy = true;
    gAbortNow = false;
    gTimer.set (gIntervalTime, pn544InteropStartPolling); //after some time, start polling again
    gMutex.unlock ();
    ALOGD ("%s: exit", __FUNCTION__);
}


/*******************************************************************************
**
** Function:        pn544InteropStartPolling
**
** Description:     Start polling when activation state is idle.
**                  sigval: Unused.
**
** Returns:         None
**
*******************************************************************************/
void pn544InteropStartPolling (union sigval)
{
    ALOGD ("%s: enter", __FUNCTION__);
    gMutex.lock ();
    NfcTag::ActivationState state = NfcTag::getInstance ().getActivationState ();

    if (gAbortNow)
    {
        ALOGD ("%s: abort now", __FUNCTION__);
        gIsBusy = false;
        goto TheEnd;
    }

    if (state == NfcTag::Idle)
    {
        ALOGD ("%s: start polling", __FUNCTION__);
        android::startStopPolling (true);
        gIsBusy = false;
    }
    else
    {
        ALOGD ("%s: try again later", __FUNCTION__);
        gTimer.set (gIntervalTime, pn544InteropStartPolling); //after some time, start polling again
    }

TheEnd:
    gMutex.unlock ();
    ALOGD ("%s: exit", __FUNCTION__);
}


/*******************************************************************************
**
** Function:        pn544InteropIsBusy
**
** Description:     Is the code performing operations?
**
** Returns:         True if the code is busy.
**
*******************************************************************************/
bool pn544InteropIsBusy ()
{
    bool isBusy = false;
    gMutex.lock ();
    isBusy = gIsBusy;
    gMutex.unlock ();
    ALOGD ("%s: %u", __FUNCTION__, isBusy);
    return isBusy;
}


/*******************************************************************************
**
** Function:        pn544InteropAbortNow
**
** Description:     Request to abort all operations.
**
** Returns:         None.
**
*******************************************************************************/
void pn544InteropAbortNow ()
{
    ALOGD ("%s", __FUNCTION__);
    gMutex.lock ();
    gAbortNow = true;
    gMutex.unlock ();
}