spdhelper.cpp revision 1569641423dac0a41af7596fdef972126e698f46 
1/******************************************************************************
2 *
3 *  Copyright (C) 2012 Broadcom Corporation
4 *
5 *  Licensed under the Apache License, Version 2.0 (the "License");
6 *  you may not use this file except in compliance with the License.
7 *  You may obtain a copy of the License at:
8 *
9 *  http://www.apache.org/licenses/LICENSE-2.0
10 *
11 *  Unless required by applicable law or agreed to in writing, software
12 *  distributed under the License is distributed on an "AS IS" BASIS,
13 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 *  See the License for the specific language governing permissions and
15 *  limitations under the License.
16 *
17 ******************************************************************************/
18
19#define LOG_TAG "NfcNciHal"
20#include "OverrideLog.h"
21#include "spdhelper.h"
22#include "config.h"
23
24void SpdHelper::setPatchAsBad()
25{
26    getInstance().setPatchAsBadImpl();
27}
28
29void SpdHelper::incErrorCount()
30{
31    getInstance().incErrorCountImpl();
32}
33
34bool SpdHelper::isPatchBad(UINT8* prm, UINT32 len)
35{
36    return getInstance().isPatchBadImpl(prm, len);
37}
38
39bool SpdHelper::isSpdDebug()
40{
41    bool b = getInstance().isSpdDebugImpl();
42    ALOGD("%s SpdDebug is %s", __func__, (b ? "TRUE" : "FALSE"));
43    return b;
44}
45
46void SpdHelper::incErrorCountImpl()
47{
48    if (++mErrorCount >= mMaxErrorCount)
49    {
50        setPatchAsBadImpl();
51    }
52}
53
54void SpdHelper::setPatchAsBadImpl()
55{
56    mIsPatchBad = true;
57}
58
59inline const char * toHex(UINT8 b)
60{
61    static char hex[] = "0123456789ABCDEF";
62    static char c[3];
63    c[0] = hex[((b >> 4) & 0x0F)];
64    c[1] = hex[((b >> 0) & 0x0F)];
65    c[2] = '\0';
66    return &c[0];
67}
68
69bool SpdHelper::isPatchBadImpl(UINT8* prm, UINT32 len)
70{
71    string strNew;
72
73    // Get the patch ID from the prm data.
74    for (int i = 0; i < 8 && i < len; ++i)
75        strNew.append(toHex(*prm++));
76
77    // If it is not the same patch as before, then reset things.
78    if ( strNew != mPatchId )
79    {
80        mPatchId = strNew;
81        mErrorCount = 0;
82        mIsPatchBad = false;
83    }
84
85    // Otherwise the 'mIsPatchBad' will tell if its bad or not.
86    ALOGD("%s '%s' (%d) is %sa known bad patch file", __func__, mPatchId.c_str(), mErrorCount, (mIsPatchBad ? "" : "not "));
87
88    return mIsPatchBad;
89}
90
91SpdHelper& SpdHelper::getInstance()
92{
93    static SpdHelper* theInstance = NULL;
94    if (theInstance == NULL)
95        theInstance= new SpdHelper;
96    return *theInstance;
97}
98
99SpdHelper::SpdHelper()
100{
101    mErrorCount = 0;
102    mPatchId.erase();
103    if(!GetNumValue((char*)NAME_SPD_MAXRETRYCOUNT, &mMaxErrorCount, sizeof(mMaxErrorCount)))
104        mMaxErrorCount = DEFAULT_SPD_MAXRETRYCOUNT;
105    mIsPatchBad = false;
106    if (!GetNumValue((char*)NAME_SPD_DEBUG, &mSpdDebug, sizeof(mSpdDebug)))
107        mSpdDebug = false;
108}
109