shinano-common: pn54x: Import from lineage-15.1

* https://github.com/LineageOS/android_system_nfc/tree/lineage-15.1/halimpl/pn54x/common
* support for pn54x has been dropped in lineage-16.0 and above

Change-Id: I19f2c3a6e3066bf9aaaaf4ddcd7d7ad867de0ed8

1 files changed, 865 insertions, 0 deletions

diff --git a/pn54x/utils/phNxpConfig.cpp b/pn54x/utils/phNxpConfig.cpp
new file mode 100644
index 0000000..9e8c7cb
--- /dev/null
+++ b/pn54x/utils/phNxpConfig.cpp
@@ -0,0 +1,865 @@
+/******************************************************************************
+ *
+ *  Copyright (C) 2011-2012 Broadcom Corporation
+ *
+ *  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.
+ *
+ ******************************************************************************/
+
+/******************************************************************************
+ *
+ *  The original Work has been changed by NXP Semiconductors.
+ *
+ *  Copyright (C) 2013-2014 NXP Semiconductors
+ *
+ *  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.
+ *
+ ******************************************************************************/
+
+#include <stdio.h>
+#include <sys/stat.h>
+#include <list>
+#include <string>
+#include <vector>
+
+#include <phNxpConfig.h>
+#include <phNxpLog.h>
+#include "sparse_crc32.h"
+
+#if GENERIC_TARGET
+const char alternative_config_path[] = "/data/vendor/nfc/";
+#else
+const char alternative_config_path[] = "";
+#endif
+
+#if 1
+const char* transport_config_paths[] = {"/odm/etc/", "/vendor/etc/", "/etc/"};
+#else
+const char* transport_config_paths[] = {"res/"};
+#endif
+const int transport_config_path_size =
+    (sizeof(transport_config_paths) / sizeof(transport_config_paths[0]));
+
+#define config_name "libnfc-nxp.conf"
+#define extra_config_base "libnfc-nxp-"
+#define extra_config_ext ".conf"
+#define IsStringValue 0x80000000
+
+const char config_timestamp_path[] =
+    "/data/vendor/nfc/libnfc-nxpConfigState.bin";
+
+namespace {
+
+size_t readConfigFile(const char* fileName, uint8_t** p_data) {
+  FILE* fd = fopen(fileName, "rb");
+  if (fd == nullptr) return 0;
+
+  fseek(fd, 0L, SEEK_END);
+  const size_t file_size = ftell(fd);
+  rewind(fd);
+
+  uint8_t* buffer = new uint8_t[file_size];
+  size_t read = fread(buffer, file_size, 1, fd);
+  fclose(fd);
+
+  if (read == 1) {
+    *p_data = buffer;
+    return file_size;
+  }
+
+  return 0;
+}
+
+}  // namespace
+
+using namespace ::std;
+
+class CNfcParam : public string {
+ public:
+  CNfcParam();
+  CNfcParam(const char* name, const string& value);
+  CNfcParam(const char* name, unsigned long value);
+  virtual ~CNfcParam();
+  unsigned long numValue() const { return m_numValue; }
+  const char* str_value() const { return m_str_value.c_str(); }
+  size_t str_len() const { return m_str_value.length(); }
+
+ private:
+  string m_str_value;
+  unsigned long m_numValue;
+};
+
+class CNfcConfig : public vector<const CNfcParam*> {
+ public:
+  virtual ~CNfcConfig();
+  static CNfcConfig& GetInstance();
+  friend void readOptionalConfig(const char* optional);
+  bool isModified();
+  void resetModified();
+
+  bool getValue(const char* name, char* pValue, size_t len) const;
+  bool getValue(const char* name, unsigned long& rValue) const;
+  bool getValue(const char* name, unsigned short& rValue) const;
+  bool getValue(const char* name, char* pValue, long len, long* readlen) const;
+  const CNfcParam* find(const char* p_name) const;
+  void clean();
+
+ private:
+  CNfcConfig();
+  bool readConfig(const char* name, bool bResetContent);
+  void moveFromList();
+  void moveToList();
+  void add(const CNfcParam* pParam);
+  list<const CNfcParam*> m_list;
+  bool mValidFile;
+  uint32_t config_crc32_;
+
+  unsigned long state;
+
+  inline bool Is(unsigned long f) { return (state & f) == f; }
+  inline void Set(unsigned long f) { state |= f; }
+  inline void Reset(unsigned long f) { state &= ~f; }
+};
+
+/*******************************************************************************
+**
+** Function:    isPrintable()
+**
+** Description: determine if 'c' is printable
+**
+** Returns:     1, if printable, otherwise 0
+**
+*******************************************************************************/
+inline bool isPrintable(char c) {
+  return (c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z') ||
+         (c >= '0' && c <= '9') || c == '/' || c == '_' || c == '-' || c == '.';
+}
+
+/*******************************************************************************
+**
+** Function:    isDigit()
+**
+** Description: determine if 'c' is numeral digit
+**
+** Returns:     true, if numerical digit
+**
+*******************************************************************************/
+inline bool isDigit(char c, int base) {
+  if ('0' <= c && c <= '9') return true;
+  if (base == 16) {
+    if (('A' <= c && c <= 'F') || ('a' <= c && c <= 'f')) return true;
+  }
+  return false;
+}
+
+/*******************************************************************************
+**
+** Function:    getDigitValue()
+**
+** Description: return numerical value of a decimal or hex char
+**
+** Returns:     numerical value if decimal or hex char, otherwise 0
+**
+*******************************************************************************/
+inline int getDigitValue(char c, int base) {
+  if ('0' <= c && c <= '9') return c - '0';
+  if (base == 16) {
+    if ('A' <= c && c <= 'F')
+      return c - 'A' + 10;
+    else if ('a' <= c && c <= 'f')
+      return c - 'a' + 10;
+  }
+  return 0;
+}
+
+/*******************************************************************************
+**
+** Function:    findConfigFilePathFromTransportConfigPaths()
+**
+** Description: find a config file path with a given config name from transport
+**              config paths
+**
+** Returns:     none
+**
+*******************************************************************************/
+void findConfigFilePathFromTransportConfigPaths(const string& configName,
+                                                string& filePath) {
+  for (int i = 0; i < transport_config_path_size - 1; i++) {
+    filePath.assign(transport_config_paths[i]);
+    filePath += configName;
+    struct stat file_stat;
+    if (stat(filePath.c_str(), &file_stat) == 0 && S_ISREG(file_stat.st_mode)) {
+      return;
+    }
+  }
+  filePath.assign(transport_config_paths[transport_config_path_size - 1]);
+  filePath += configName;
+}
+
+/*******************************************************************************
+**
+** Function:    CNfcConfig::readConfig()
+**
+** Description: read Config settings and parse them into a linked list
+**              move the element from linked list to a array at the end
+**
+** Returns:     1, if there are any config data, 0 otherwise
+**
+*******************************************************************************/
+bool CNfcConfig::readConfig(const char* name, bool bResetContent) {
+  enum {
+    BEGIN_LINE = 1,
+    TOKEN,
+    STR_VALUE,
+    NUM_VALUE,
+    BEGIN_HEX,
+    BEGIN_QUOTE,
+    END_LINE
+  };
+
+  uint8_t* p_config = nullptr;
+  size_t config_size = readConfigFile(name, &p_config);
+  if (p_config == nullptr) {
+    ALOGE("%s Cannot open config file %s\n", __func__, name);
+    if (bResetContent) {
+      ALOGE("%s Using default value for all settings\n", __func__);
+      mValidFile = false;
+    }
+    return false;
+  }
+
+  string token;
+  string strValue;
+  unsigned long numValue = 0;
+  CNfcParam* pParam = NULL;
+  int i = 0;
+  int base = 0;
+  char c;
+  int bflag = 0;
+  state = BEGIN_LINE;
+
+  config_crc32_ = sparse_crc32(0, p_config, config_size);
+  mValidFile = true;
+  if (size() > 0) {
+    if (bResetContent)
+      clean();
+    else
+      moveToList();
+  }
+
+  for (size_t offset = 0; offset != config_size; ++offset) {
+    c = p_config[offset];
+    switch (state & 0xff) {
+      case BEGIN_LINE:
+        if (c == '#')
+          state = END_LINE;
+        else if (isPrintable(c)) {
+          i = 0;
+          token.erase();
+          strValue.erase();
+          state = TOKEN;
+          token.push_back(c);
+        }
+        break;
+      case TOKEN:
+        if (c == '=') {
+          token.push_back('\0');
+          state = BEGIN_QUOTE;
+        } else if (isPrintable(c))
+          token.push_back(c);
+        else
+          state = END_LINE;
+        break;
+      case BEGIN_QUOTE:
+        if (c == '"') {
+          state = STR_VALUE;
+          base = 0;
+        } else if (c == '0')
+          state = BEGIN_HEX;
+        else if (isDigit(c, 10)) {
+          state = NUM_VALUE;
+          base = 10;
+          numValue = getDigitValue(c, base);
+          i = 0;
+        } else if (c == '{') {
+          state = NUM_VALUE;
+          bflag = 1;
+          base = 16;
+          i = 0;
+          Set(IsStringValue);
+        } else
+          state = END_LINE;
+        break;
+      case BEGIN_HEX:
+        if (c == 'x' || c == 'X') {
+          state = NUM_VALUE;
+          base = 16;
+          numValue = 0;
+          i = 0;
+          break;
+        } else if (isDigit(c, 10)) {
+          state = NUM_VALUE;
+          base = 10;
+          numValue = getDigitValue(c, base);
+          break;
+        } else if (c != '\n' && c != '\r') {
+          state = END_LINE;
+          break;
+        }
+      // fall through to numValue to handle numValue
+
+      case NUM_VALUE:
+        if (isDigit(c, base)) {
+          numValue *= base;
+          numValue += getDigitValue(c, base);
+          ++i;
+        } else if (bflag == 1 &&
+                   (c == ' ' || c == '\r' || c == '\n' || c == '\t')) {
+          break;
+        } else if (base == 16 &&
+                   (c == ',' || c == ':' || c == '-' || c == ' ' || c == '}')) {
+          if (c == '}') {
+            bflag = 0;
+          }
+          if (i > 0) {
+            int n = (i + 1) / 2;
+            while (n-- > 0) {
+              numValue = numValue >> (n * 8);
+              unsigned char c = (numValue)&0xFF;
+              strValue.push_back(c);
+            }
+          }
+
+          Set(IsStringValue);
+          numValue = 0;
+          i = 0;
+        } else {
+          if (c == '\n' || c == '\r') {
+            if (bflag == 0) {
+              state = BEGIN_LINE;
+            }
+          } else {
+            if (bflag == 0) {
+              state = END_LINE;
+            }
+          }
+          if (Is(IsStringValue) && base == 16 && i > 0) {
+            int n = (i + 1) / 2;
+            while (n-- > 0) strValue.push_back(((numValue >> (n * 8)) & 0xFF));
+          }
+          if (strValue.length() > 0)
+            pParam = new CNfcParam(token.c_str(), strValue);
+          else
+            pParam = new CNfcParam(token.c_str(), numValue);
+          add(pParam);
+          strValue.erase();
+          numValue = 0;
+        }
+        break;
+      case STR_VALUE:
+        if (c == '"') {
+          strValue.push_back('\0');
+          state = END_LINE;
+          pParam = new CNfcParam(token.c_str(), strValue);
+          add(pParam);
+        } else if (isPrintable(c))
+          strValue.push_back(c);
+        break;
+      case END_LINE:
+        if (c == '\n' || c == '\r') state = BEGIN_LINE;
+        break;
+      default:
+        break;
+    }
+  }
+
+  delete[] p_config;
+
+  moveFromList();
+  return size() > 0;
+}
+
+/*******************************************************************************
+**
+** Function:    CNfcConfig::CNfcConfig()
+**
+** Description: class constructor
+**
+** Returns:     none
+**
+*******************************************************************************/
+CNfcConfig::CNfcConfig() : mValidFile(true), state(0) {}
+
+/*******************************************************************************
+**
+** Function:    CNfcConfig::~CNfcConfig()
+**
+** Description: class destructor
+**
+** Returns:     none
+**
+*******************************************************************************/
+CNfcConfig::~CNfcConfig() {}
+
+/*******************************************************************************
+**
+** Function:    CNfcConfig::GetInstance()
+**
+** Description: get class singleton object
+**
+** Returns:     none
+**
+*******************************************************************************/
+CNfcConfig& CNfcConfig::GetInstance() {
+  static CNfcConfig theInstance;
+
+  if (theInstance.size() == 0 && theInstance.mValidFile) {
+    string strPath;
+    if (alternative_config_path[0] != '\0') {
+      strPath.assign(alternative_config_path);
+      strPath += config_name;
+      theInstance.readConfig(strPath.c_str(), true);
+      if (!theInstance.empty()) {
+        return theInstance;
+      }
+    }
+    findConfigFilePathFromTransportConfigPaths(config_name, strPath);
+    theInstance.readConfig(strPath.c_str(), true);
+  }
+
+  return theInstance;
+}
+
+/*******************************************************************************
+**
+** Function:    CNfcConfig::getValue()
+**
+** Description: get a string value of a setting
+**
+** Returns:     true if setting exists
+**              false if setting does not exist
+**
+*******************************************************************************/
+bool CNfcConfig::getValue(const char* name, char* pValue, size_t len) const {
+  const CNfcParam* pParam = find(name);
+  if (pParam == NULL) return false;
+
+  if (pParam->str_len() > 0) {
+    memset(pValue, 0, len);
+    memcpy(pValue, pParam->str_value(), pParam->str_len());
+    return true;
+  }
+  return false;
+}
+
+bool CNfcConfig::getValue(const char* name, char* pValue, long len,
+                          long* readlen) const {
+  const CNfcParam* pParam = find(name);
+  if (pParam == NULL) return false;
+
+  if (pParam->str_len() > 0) {
+    if (pParam->str_len() <= (unsigned long)len) {
+      memset(pValue, 0, len);
+      memcpy(pValue, pParam->str_value(), pParam->str_len());
+      *readlen = pParam->str_len();
+    } else {
+      *readlen = -1;
+    }
+
+    return true;
+  }
+  return false;
+}
+
+/*******************************************************************************
+**
+** Function:    CNfcConfig::getValue()
+**
+** Description: get a long numerical value of a setting
+**
+** Returns:     true if setting exists
+**              false if setting does not exist
+**
+*******************************************************************************/
+bool CNfcConfig::getValue(const char* name, unsigned long& rValue) const {
+  const CNfcParam* pParam = find(name);
+  if (pParam == NULL) return false;
+
+  if (pParam->str_len() == 0) {
+    rValue = static_cast<unsigned long>(pParam->numValue());
+    return true;
+  }
+  return false;
+}
+
+/*******************************************************************************
+**
+** Function:    CNfcConfig::getValue()
+**
+** Description: get a short numerical value of a setting
+**
+** Returns:     true if setting exists
+**              false if setting does not exist
+**
+*******************************************************************************/
+bool CNfcConfig::getValue(const char* name, unsigned short& rValue) const {
+  const CNfcParam* pParam = find(name);
+  if (pParam == NULL) return false;
+
+  if (pParam->str_len() == 0) {
+    rValue = static_cast<unsigned short>(pParam->numValue());
+    return true;
+  }
+  return false;
+}
+
+/*******************************************************************************
+**
+** Function:    CNfcConfig::find()
+**
+** Description: search if a setting exist in the setting array
+**
+** Returns:     pointer to the setting object
+**
+*******************************************************************************/
+const CNfcParam* CNfcConfig::find(const char* p_name) const {
+  if (size() == 0) return NULL;
+
+  for (const_iterator it = begin(), itEnd = end(); it != itEnd; ++it) {
+    if (**it < p_name) {
+      continue;
+    } else if (**it == p_name) {
+      if ((*it)->str_len() > 0) {
+        NXPLOG_EXTNS_D("%s found %s=%s\n", __func__, p_name,
+                       (*it)->str_value());
+      } else {
+        NXPLOG_EXTNS_D("%s found %s=(0x%lx)\n", __func__, p_name,
+                       (*it)->numValue());
+      }
+      return *it;
+    } else
+      break;
+  }
+  return NULL;
+}
+
+/*******************************************************************************
+**
+** Function:    CNfcConfig::clean()
+**
+** Description: reset the setting array
+**
+** Returns:     none
+**
+*******************************************************************************/
+void CNfcConfig::clean() {
+  if (size() == 0) return;
+
+  for (iterator it = begin(), itEnd = end(); it != itEnd; ++it) delete *it;
+  clear();
+}
+
+/*******************************************************************************
+**
+** Function:    CNfcConfig::Add()
+**
+** Description: add a setting object to the list
+**
+** Returns:     none
+**
+*******************************************************************************/
+void CNfcConfig::add(const CNfcParam* pParam) {
+  if (m_list.size() == 0) {
+    m_list.push_back(pParam);
+    return;
+  }
+  for (list<const CNfcParam *>::iterator it = m_list.begin(),
+                                         itEnd = m_list.end();
+       it != itEnd; ++it) {
+    if (**it < pParam->c_str()) continue;
+    m_list.insert(it, pParam);
+    return;
+  }
+  m_list.push_back(pParam);
+}
+
+/*******************************************************************************
+**
+** Function:    CNfcConfig::moveFromList()
+**
+** Description: move the setting object from list to array
+**
+** Returns:     none
+**
+*******************************************************************************/
+void CNfcConfig::moveFromList() {
+  if (m_list.size() == 0) return;
+
+  for (list<const CNfcParam *>::iterator it = m_list.begin(),
+                                         itEnd = m_list.end();
+       it != itEnd; ++it)
+    push_back(*it);
+  m_list.clear();
+}
+
+/*******************************************************************************
+**
+** Function:    CNfcConfig::moveToList()
+**
+** Description: move the setting object from array to list
+**
+** Returns:     none
+**
+*******************************************************************************/
+void CNfcConfig::moveToList() {
+  if (m_list.size() != 0) m_list.clear();
+
+  for (iterator it = begin(), itEnd = end(); it != itEnd; ++it)
+    m_list.push_back(*it);
+  clear();
+}
+
+bool CNfcConfig::isModified() {
+  FILE* fd = fopen(config_timestamp_path, "r+");
+  if (fd == nullptr) {
+    ALOGE("%s Unable to open file '%s' - assuming modified", __func__,
+          config_timestamp_path);
+    return true;
+  }
+
+  uint32_t stored_crc32 = 0;
+  fread(&stored_crc32, sizeof(uint32_t), 1, fd);
+  fclose(fd);
+
+  return stored_crc32 != config_crc32_;
+}
+
+void CNfcConfig::resetModified() {
+  FILE* fd = fopen(config_timestamp_path, "w+");
+  if (fd == nullptr) {
+    ALOGE("%s Unable to open file '%s' for writing", __func__,
+          config_timestamp_path);
+    return;
+  }
+
+  fwrite(&config_crc32_, sizeof(uint32_t), 1, fd);
+  fclose(fd);
+}
+
+/*******************************************************************************
+**
+** Function:    CNfcParam::CNfcParam()
+**
+** Description: class constructor
+**
+** Returns:     none
+**
+*******************************************************************************/
+CNfcParam::CNfcParam() : m_numValue(0) {}
+
+/*******************************************************************************
+**
+** Function:    CNfcParam::~CNfcParam()
+**
+** Description: class destructor
+**
+** Returns:     none
+**
+*******************************************************************************/
+CNfcParam::~CNfcParam() {}
+
+/*******************************************************************************
+**
+** Function:    CNfcParam::CNfcParam()
+**
+** Description: class copy constructor
+**
+** Returns:     none
+**
+*******************************************************************************/
+CNfcParam::CNfcParam(const char* name, const string& value)
+    : string(name), m_str_value(value), m_numValue(0) {}
+
+/*******************************************************************************
+**
+** Function:    CNfcParam::CNfcParam()
+**
+** Description: class copy constructor
+**
+** Returns:     none
+**
+*******************************************************************************/
+CNfcParam::CNfcParam(const char* name, unsigned long value)
+    : string(name), m_numValue(value) {}
+
+/*******************************************************************************
+**
+** Function:    GetStrValue
+**
+** Description: API function for getting a string value of a setting
+**
+** Returns:     True if found, otherwise False.
+**
+*******************************************************************************/
+extern "C" int GetNxpStrValue(const char* name, char* pValue,
+                              unsigned long len) {
+  CNfcConfig& rConfig = CNfcConfig::GetInstance();
+
+  return rConfig.getValue(name, pValue, len);
+}
+
+/*******************************************************************************
+**
+** Function:    GetByteArrayValue()
+**
+** Description: Read byte array value from the config file.
+**
+** Parameters:
+**              name - name of the config param to read.
+**              pValue  - pointer to input buffer.
+**              bufflen - input buffer length.
+**              len - out parameter to return the number of bytes read from
+**                    config file, return -1 in case bufflen is not enough.
+**
+** Returns:     TRUE[1] if config param name is found in the config file, else
+**              FALSE[0]
+**
+*******************************************************************************/
+extern "C" int GetNxpByteArrayValue(const char* name, char* pValue,
+                                    long bufflen, long* len) {
+  CNfcConfig& rConfig = CNfcConfig::GetInstance();
+
+  return rConfig.getValue(name, pValue, bufflen, len);
+}
+
+/*******************************************************************************
+**
+** Function:    GetNumValue
+**
+** Description: API function for getting a numerical value of a setting
+**
+** Returns:     true, if successful
+**
+*******************************************************************************/
+extern "C" int GetNxpNumValue(const char* name, void* pValue,
+                              unsigned long len) {
+  if (!pValue) return false;
+
+  CNfcConfig& rConfig = CNfcConfig::GetInstance();
+  const CNfcParam* pParam = rConfig.find(name);
+
+  if (pParam == NULL) return false;
+  unsigned long v = pParam->numValue();
+  if (v == 0 && pParam->str_len() > 0 && pParam->str_len() < 4) {
+    const unsigned char* p = (const unsigned char*)pParam->str_value();
+    for (unsigned int i = 0; i < pParam->str_len(); ++i) {
+      v *= 256;
+      v += *p++;
+    }
+  }
+  switch (len) {
+    case sizeof(unsigned long):
+      *(static_cast<unsigned long*>(pValue)) = (unsigned long)v;
+      break;
+    case sizeof(unsigned short):
+      *(static_cast<unsigned short*>(pValue)) = (unsigned short)v;
+      break;
+    case sizeof(unsigned char):
+      *(static_cast<unsigned char*>(pValue)) = (unsigned char)v;
+      break;
+    default:
+      return false;
+  }
+  return true;
+}
+
+/*******************************************************************************
+**
+** Function:    resetConfig
+**
+** Description: reset settings array
+**
+** Returns:     none
+**
+*******************************************************************************/
+extern "C" void resetNxpConfig()
+
+{
+  CNfcConfig& rConfig = CNfcConfig::GetInstance();
+
+  rConfig.clean();
+}
+
+/*******************************************************************************
+**
+** Function:    readOptionalConfig()
+**
+** Description: read Config settings from an optional conf file
+**
+** Returns:     none
+**
+*******************************************************************************/
+void readOptionalConfig(const char* extra) {
+  string strPath;
+  string configName(extra_config_base);
+  configName += extra;
+  configName += extra_config_ext;
+
+  if (alternative_config_path[0] != '\0') {
+    strPath.assign(alternative_config_path);
+    strPath += configName;
+  } else {
+    findConfigFilePathFromTransportConfigPaths(configName, strPath);
+  }
+
+  CNfcConfig::GetInstance().readConfig(strPath.c_str(), false);
+}
+
+/*******************************************************************************
+**
+** Function:    isNxpConfigModified()
+**
+** Description: check if config file has modified
+**
+** Returns:     0 if not modified, 1 otherwise.
+**
+*******************************************************************************/
+extern "C" int isNxpConfigModified() {
+  CNfcConfig& rConfig = CNfcConfig::GetInstance();
+  return rConfig.isModified();
+}
+
+/*******************************************************************************
+**
+** Function:    updateNxpConfigTimestamp()
+**
+** Description: update if config file has modified
+**
+** Returns:     0 if not modified, 1 otherwise.
+**
+*******************************************************************************/
+extern "C" int updateNxpConfigTimestamp() {
+  CNfcConfig& rConfig = CNfcConfig::GetInstance();
+  rConfig.resetModified();
+  return 0;
+}