1 files changed, 152 insertions, 0 deletions
diff --git a/drivers/input/touchscreen/msg2138/mstar_drv_common.c b/drivers/input/touchscreen/msg2138/mstar_drv_common.c
new file mode 100644
index 00000000..62c553dd
--- /dev/null
+++ b/drivers/input/touchscreen/msg2138/mstar_drv_common.c
@@ -0,0 +1,152 @@
+////////////////////////////////////////////////////////////////////////////////
+//
+// Copyright (c) 2006-2012 MStar Semiconductor, Inc.
+// All rights reserved.
+//
+// Unless otherwise stipulated in writing, any and all information contained
+// herein regardless in any format shall remain the sole proprietary of
+// MStar Semiconductor Inc. and be kept in strict confidence
+// (??MStar Confidential Information??) by the recipient.
+// Any unauthorized act including without limitation unauthorized disclosure,
+// copying, use, reproduction, sale, distribution, modification, disassembling,
+// reverse engineering and compiling of the contents of MStar Confidential
+// Information is unlawful and strictly prohibited. MStar hereby reserves the
+// rights to any and all damages, losses, costs and expenses resulting therefrom.
+//
+////////////////////////////////////////////////////////////////////////////////
+
+/**
+ *
+ * @file    mstar_drv_common.c
+ *
+ * @brief   This file defines the interface of touch screen
+ *
+ * @version v2.2.0.0
+ *
+ */
+
+/*=============================================================*/
+// INCLUDE FILE
+/*=============================================================*/
+
+#include "mstar_drv_common.h"
+
+/*=============================================================*/
+// MACRO DEFINITION
+/*=============================================================*/
+
+/*=============================================================*/
+// CONSTANT VALUE DEFINITION
+/*=============================================================*/
+
+
+/*=============================================================*/
+// VARIABLE DEFINITION
+/*=============================================================*/
+
+static u32 _gCrc32Table[256]; 
+
+/*=============================================================*/
+// DATA TYPE DEFINITION
+/*=============================================================*/
+
+/*=============================================================*/
+// GLOBAL FUNCTION DEFINITION
+/*=============================================================*/
+
+/// CRC
+u32 DrvCommonCrcDoReflect(u32 nRef, s8 nCh)
+{
+    u32 nValue = 0;
+    u32 i = 0;
+
+    for (i = 1; i < (nCh + 1); i ++)
+    {
+        if (nRef & 1)
+        {
+            nValue |= 1 << (nCh - i);
+        }
+        nRef >>= 1;
+    }
+
+    return nValue;
+}
+
+u32 DrvCommonCrcGetValue(u32 nText, u32 nPrevCRC)
+{
+    u32 nCRC = nPrevCRC;
+
+    nCRC = (nCRC >> 8) ^ _gCrc32Table[(nCRC & 0xFF) ^ nText];
+
+    return nCRC;
+}
+
+void DrvCommonCrcInitTable(void)
+{
+    u32 nMagicNumber = 0x04c11db7;
+    u32 i, j;
+
+    for (i = 0; i <= 0xFF; i ++)
+    {
+        _gCrc32Table[i] = DrvCommonCrcDoReflect(i, 8) << 24;
+        for (j = 0; j < 8; j ++)
+        {
+            _gCrc32Table[i] = (_gCrc32Table[i] << 1) ^ (_gCrc32Table[i] & (0x80000000L) ? nMagicNumber : 0);
+        }
+        _gCrc32Table[i] = DrvCommonCrcDoReflect(_gCrc32Table[i], 32);
+    }
+}
+
+u8 DrvCommonCalculateCheckSum(u8 *pMsg, u32 nLength)
+{
+    s32 nCheckSum = 0;
+    u32 i;
+
+    for (i = 0; i < nLength; i ++)
+    {
+        nCheckSum += pMsg[i];
+    }
+
+    return (u8)((-nCheckSum) & 0xFF);
+}
+
+u32 DrvCommonConvertCharToHexDigit(char *pCh, u32 nLength)
+{
+    u32 nRetVal = 0;
+    u32 i;
+    
+    DBG("nLength = %d\n", nLength);
+
+    for (i = 0; i < nLength; i ++)
+    {
+        char ch = *pCh++;
+        u32 n = 0;
+        
+        if ((i == 0 && ch == '0') || (i == 1 && ch == 'x'))
+        {
+            continue;		
+        }
+        
+        if ('0' <= ch && ch <= '9')
+        {
+            n = ch-'0';
+        }
+        else if ('a' <= ch && ch <= 'f')
+        {
+            n = 10 + ch-'a';
+        }
+        else if ('A' <= ch && ch <= 'F')
+        {
+            n = 10 + ch-'A';
+        }
+        
+        if (i < 6)
+        {
+            nRetVal = n + nRetVal*16;
+        }
+    }
+    
+    return nRetVal;
+}
+
+//------------------------------------------------------------------------------//
+\ No newline at end of file