Move CrcChecksum to bcm2079x HAL

Change-Id: Ia09b37492847a3d853198707f9006bc17311be5f

2 files changed, 172 insertions, 0 deletions

diff --git a/halimpl/bcm2079x/adaptation/CrcChecksum.cpp b/halimpl/bcm2079x/adaptation/CrcChecksum.cpp
new file mode 100644
index 0000000..af20f6e
--- /dev/null
+++ b/halimpl/bcm2079x/adaptation/CrcChecksum.cpp
@@ -0,0 +1,121 @@
+/******************************************************************************
+ *
+ *  Copyright (C) 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.
+ *
+ ******************************************************************************/
+#include "CrcChecksum.h"
+#include <errno.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <string>
+#include "_OverrideLog.h"
+
+#undef LOG_TAG
+#define LOG_TAG "NfcNciHal"
+
+static const unsigned short crctab[256] = {
+    0x0000, 0xc0c1, 0xc181, 0x0140, 0xc301, 0x03c0, 0x0280, 0xc241, 0xc601,
+    0x06c0, 0x0780, 0xc741, 0x0500, 0xc5c1, 0xc481, 0x0440, 0xcc01, 0x0cc0,
+    0x0d80, 0xcd41, 0x0f00, 0xcfc1, 0xce81, 0x0e40, 0x0a00, 0xcac1, 0xcb81,
+    0x0b40, 0xc901, 0x09c0, 0x0880, 0xc841, 0xd801, 0x18c0, 0x1980, 0xd941,
+    0x1b00, 0xdbc1, 0xda81, 0x1a40, 0x1e00, 0xdec1, 0xdf81, 0x1f40, 0xdd01,
+    0x1dc0, 0x1c80, 0xdc41, 0x1400, 0xd4c1, 0xd581, 0x1540, 0xd701, 0x17c0,
+    0x1680, 0xd641, 0xd201, 0x12c0, 0x1380, 0xd341, 0x1100, 0xd1c1, 0xd081,
+    0x1040, 0xf001, 0x30c0, 0x3180, 0xf141, 0x3300, 0xf3c1, 0xf281, 0x3240,
+    0x3600, 0xf6c1, 0xf781, 0x3740, 0xf501, 0x35c0, 0x3480, 0xf441, 0x3c00,
+    0xfcc1, 0xfd81, 0x3d40, 0xff01, 0x3fc0, 0x3e80, 0xfe41, 0xfa01, 0x3ac0,
+    0x3b80, 0xfb41, 0x3900, 0xf9c1, 0xf881, 0x3840, 0x2800, 0xe8c1, 0xe981,
+    0x2940, 0xeb01, 0x2bc0, 0x2a80, 0xea41, 0xee01, 0x2ec0, 0x2f80, 0xef41,
+    0x2d00, 0xedc1, 0xec81, 0x2c40, 0xe401, 0x24c0, 0x2580, 0xe541, 0x2700,
+    0xe7c1, 0xe681, 0x2640, 0x2200, 0xe2c1, 0xe381, 0x2340, 0xe101, 0x21c0,
+    0x2080, 0xe041, 0xa001, 0x60c0, 0x6180, 0xa141, 0x6300, 0xa3c1, 0xa281,
+    0x6240, 0x6600, 0xa6c1, 0xa781, 0x6740, 0xa501, 0x65c0, 0x6480, 0xa441,
+    0x6c00, 0xacc1, 0xad81, 0x6d40, 0xaf01, 0x6fc0, 0x6e80, 0xae41, 0xaa01,
+    0x6ac0, 0x6b80, 0xab41, 0x6900, 0xa9c1, 0xa881, 0x6840, 0x7800, 0xb8c1,
+    0xb981, 0x7940, 0xbb01, 0x7bc0, 0x7a80, 0xba41, 0xbe01, 0x7ec0, 0x7f80,
+    0xbf41, 0x7d00, 0xbdc1, 0xbc81, 0x7c40, 0xb401, 0x74c0, 0x7580, 0xb541,
+    0x7700, 0xb7c1, 0xb681, 0x7640, 0x7200, 0xb2c1, 0xb381, 0x7340, 0xb101,
+    0x71c0, 0x7080, 0xb041, 0x5000, 0x90c1, 0x9181, 0x5140, 0x9301, 0x53c0,
+    0x5280, 0x9241, 0x9601, 0x56c0, 0x5780, 0x9741, 0x5500, 0x95c1, 0x9481,
+    0x5440, 0x9c01, 0x5cc0, 0x5d80, 0x9d41, 0x5f00, 0x9fc1, 0x9e81, 0x5e40,
+    0x5a00, 0x9ac1, 0x9b81, 0x5b40, 0x9901, 0x59c0, 0x5880, 0x9841, 0x8801,
+    0x48c0, 0x4980, 0x8941, 0x4b00, 0x8bc1, 0x8a81, 0x4a40, 0x4e00, 0x8ec1,
+    0x8f81, 0x4f40, 0x8d01, 0x4dc0, 0x4c80, 0x8c41, 0x4400, 0x84c1, 0x8581,
+    0x4540, 0x8701, 0x47c0, 0x4680, 0x8641, 0x8201, 0x42c0, 0x4380, 0x8341,
+    0x4100, 0x81c1, 0x8081, 0x4040,
+};
+
+/*******************************************************************************
+**
+** Function         crcChecksumCompute
+**
+** Description      Compute a checksum on a buffer of data.
+**
+** Returns          2-byte checksum.
+**
+*******************************************************************************/
+unsigned short crcChecksumCompute(const unsigned char* buffer, int bufferLen) {
+  register unsigned short crc = 0;
+  const register unsigned char* cp = buffer;
+  register int cnt = bufferLen;
+
+  while (cnt--) {
+    crc = ((crc >> 8) & 0xff) ^ crctab[(crc & 0xff) ^ *cp++];
+  }
+  return (crc);
+}
+
+/*******************************************************************************
+**
+** Function         crcChecksumVerifyIntegrity
+**
+** Description      Detect any corruption in a file by computing a checksum.
+**                  filename: file name.
+**
+** Returns          True if file is good.
+**
+*******************************************************************************/
+bool crcChecksumVerifyIntegrity(const char* filename) {
+  ALOGD("%s: filename=%s", __func__, filename);
+  bool isGood = FALSE;
+  int fileStream = open(filename, O_RDONLY);
+  if (fileStream >= 0) {
+    unsigned short checksum = 0;
+    std::string data;
+    size_t actualReadCrc = read(fileStream, &checksum, sizeof(checksum));
+    while (true) {
+      char buffer[1024];
+      ssize_t actualReadData = read(fileStream, buffer, sizeof(buffer));
+      if (actualReadData > 0)
+        data.append(buffer, actualReadData);
+      else
+        break;
+    }
+    close(fileStream);
+    if ((actualReadCrc == sizeof(checksum)) && (data.size() > 0)) {
+      ALOGD("%s: data size=%zu", __func__, data.size());
+      if (checksum ==
+          crcChecksumCompute((const unsigned char*)data.data(), data.size()))
+        isGood = TRUE;
+      else
+        ALOGE("%s: checksum mismatch", __func__);
+    } else
+      ALOGE("%s: invalid length", __func__);
+  } else
+    isGood = TRUE;  // assume file does not exist
+  return isGood;
+}
diff --git a/halimpl/bcm2079x/include/CrcChecksum.h b/halimpl/bcm2079x/include/CrcChecksum.h
new file mode 100644
index 0000000..f3154f2
--- /dev/null
+++ b/halimpl/bcm2079x/include/CrcChecksum.h
@@ -0,0 +1,51 @@
+/******************************************************************************
+ *
+ *  Copyright (C) 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.
+ *
+ ******************************************************************************/
+#pragma once
+
+#include <stdbool.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*******************************************************************************
+**
+** Function         crcChecksumCompute
+**
+** Description      Compute a checksum on a buffer of data.
+**
+** Returns          2-byte checksum.
+**
+*******************************************************************************/
+unsigned short crcChecksumCompute(const unsigned char* buffer, int bufferLen);
+
+/*******************************************************************************
+**
+** Function         crcChecksumVerifyIntegrity
+**
+** Description      Detect any corruption in a file by computing a checksum.
+**                  filename: file name.
+**
+** Returns          True if file is good.
+**
+*******************************************************************************/
+bool crcChecksumVerifyIntegrity(const char* filename);
+
+#ifdef __cplusplus
+}
+#endif