Staging: Add pristine upstream vt6655 driver sources
Add pristine upstream vt6655 driver sources to drivers/staging/vt6655. These
files were literally copied from the driver directory in the upstream source
archive, available here:
http://www.viaarena.com/Driver/vt6655_linux_src_v1.19.12_x86.zip
Signed-off-by: Forest Bond <forest@alittletooquiet.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/staging/vt6655/tether.c b/drivers/staging/vt6655/tether.c
new file mode 100644
index 0000000..fd69423
--- /dev/null
+++ b/drivers/staging/vt6655/tether.c
@@ -0,0 +1,123 @@
+/*
+ * Copyright (c) 2003 VIA Networking, Inc. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ *
+ * File: tether.c
+ *
+ * Purpose:
+ *
+ * Author: Tevin Chen
+ *
+ * Date: May 21, 1996
+ *
+ * Functions:
+ * ETHbyGetHashIndexByCrc32 - Caculate multicast hash value by CRC32
+ * ETHbIsBufferCrc32Ok - Check CRC value of the buffer if Ok or not
+ *
+ * Revision History:
+ *
+ */
+
+#if !defined(__DEVICE_H__)
+#include "device.h"
+#endif
+#if !defined(__TMACRO_H__)
+#include "tmacro.h"
+#endif
+#if !defined(__TBIT_H__)
+#include "tbit.h"
+#endif
+#if !defined(__TCRC_H__)
+#include "tcrc.h"
+#endif
+#if !defined(__TETHER_H__)
+#include "tether.h"
+#endif
+
+
+
+
+/*--------------------- Static Definitions -------------------------*/
+
+/*--------------------- Static Classes ----------------------------*/
+
+/*--------------------- Static Variables --------------------------*/
+
+/*--------------------- Static Functions --------------------------*/
+
+/*--------------------- Export Variables --------------------------*/
+
+
+
+/*
+ * Description: Caculate multicast hash value by CRC32
+ *
+ * Parameters:
+ * In:
+ * pbyMultiAddr - Multicast Address
+ * Out:
+ * none
+ *
+ * Return Value: Hash value
+ *
+ */
+BYTE ETHbyGetHashIndexByCrc32 (PBYTE pbyMultiAddr)
+{
+ int ii;
+ BYTE byTmpHash;
+ BYTE byHash = 0;
+
+ // get the least 6-bits from CRC generator
+ byTmpHash = (BYTE)(CRCdwCrc32(pbyMultiAddr, U_ETHER_ADDR_LEN,
+ 0xFFFFFFFFL) & 0x3F);
+ // reverse most bit to least bit
+ for (ii = 0; ii < (sizeof(byTmpHash) * 8); ii++) {
+ byHash <<= 1;
+ if (BITbIsBitOn(byTmpHash, 0x01))
+ byHash |= 1;
+ byTmpHash >>= 1;
+ }
+
+ // adjust 6-bits to the right most
+ return (byHash >> 2);
+}
+
+
+/*
+ * Description: Check CRC value of the buffer if Ok or not
+ *
+ * Parameters:
+ * In:
+ * pbyBuffer - pointer of buffer (normally is rx buffer)
+ * cbFrameLength - length of buffer, including CRC portion
+ * Out:
+ * none
+ *
+ * Return Value: TRUE if ok; FALSE if error.
+ *
+ */
+BOOL ETHbIsBufferCrc32Ok (PBYTE pbyBuffer, UINT cbFrameLength)
+{
+ DWORD dwCRC;
+
+ dwCRC = CRCdwGetCrc32(pbyBuffer, cbFrameLength - 4);
+ if (cpu_to_le32(*((PDWORD)(pbyBuffer + cbFrameLength - 4))) != dwCRC) {
+ return FALSE;
+ }
+ return TRUE;
+}
+