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
setPatchAsBad()24 void SpdHelper::setPatchAsBad()
25 {
26 getInstance().setPatchAsBadImpl();
27 }
28
incErrorCount()29 void SpdHelper::incErrorCount()
30 {
31 getInstance().incErrorCountImpl();
32 }
33
isPatchBad(UINT8 * prm,UINT32 len)34 bool SpdHelper::isPatchBad(UINT8* prm, UINT32 len)
35 {
36 return getInstance().isPatchBadImpl(prm, len);
37 }
38
isSpdDebug()39 bool SpdHelper::isSpdDebug()
40 {
41 bool b = getInstance().isSpdDebugImpl();
42 ALOGD("%s SpdDebug is %s", __func__, (b ? "TRUE" : "FALSE"));
43 return b;
44 }
45
incErrorCountImpl()46 void SpdHelper::incErrorCountImpl()
47 {
48 if (++mErrorCount >= mMaxErrorCount)
49 {
50 setPatchAsBadImpl();
51 }
52 }
53
setPatchAsBadImpl()54 void SpdHelper::setPatchAsBadImpl()
55 {
56 mIsPatchBad = true;
57 }
58
toHex(UINT8 b)59 inline 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
isPatchBadImpl(UINT8 * prm,UINT32 len)69 bool 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
getInstance()91 SpdHelper& SpdHelper::getInstance()
92 {
93 static SpdHelper* theInstance = NULL;
94 if (theInstance == NULL)
95 theInstance= new SpdHelper;
96 return *theInstance;
97 }
98
SpdHelper()99 SpdHelper::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