287 lines
8.7 KiB
C
287 lines
8.7 KiB
C
/*****************************************************************************
|
|
** **
|
|
** COPYRIGHT (C) 2000, 2001 MKNET CORPORATION **
|
|
** DEVELOPED FOR THE MK7100-BASED VFIR PCI CONTROLLER. **
|
|
** **
|
|
*****************************************************************************/
|
|
|
|
/**********************************************************************
|
|
|
|
Module Name:
|
|
SIR.C
|
|
|
|
Routines:
|
|
NdisToSirPacket
|
|
ComputeSirFCS
|
|
ProcRXSir
|
|
|
|
Comments:
|
|
|
|
**********************************************************************/
|
|
|
|
|
|
#include "precomp.h"
|
|
#include "protot.h"
|
|
#pragma hdrstop
|
|
|
|
|
|
|
|
// SIR only
|
|
const USHORT fcsTable[256] =
|
|
{
|
|
0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf,
|
|
0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7,
|
|
0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e,
|
|
0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876,
|
|
0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd,
|
|
0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5,
|
|
0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c,
|
|
0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974,
|
|
0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb,
|
|
0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3,
|
|
0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a,
|
|
0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72,
|
|
0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9,
|
|
0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1,
|
|
0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738,
|
|
0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70,
|
|
0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7,
|
|
0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff,
|
|
0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036,
|
|
0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e,
|
|
0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5,
|
|
0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd,
|
|
0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134,
|
|
0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c,
|
|
0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3,
|
|
0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb,
|
|
0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232,
|
|
0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a,
|
|
0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1,
|
|
0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9,
|
|
0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330,
|
|
0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
ULONG __inline EscapeSlowIrData(PUCHAR Dest, UCHAR SourceByte)
|
|
{
|
|
switch (SourceByte){
|
|
case SIR_BOF:
|
|
case SIR_EOF:
|
|
case SIR_ESC:
|
|
Dest[0] = SIR_ESC;
|
|
Dest[1] = SourceByte ^ SIR_ESC_COMP;
|
|
return 2;
|
|
|
|
default:
|
|
Dest[0] = SourceByte;
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Procedure: [NdisToSirPacket]
|
|
//-----------------------------------------------------------------------------
|
|
BOOLEAN NdisToSirPacket (PMK7_ADAPTER Adapter,
|
|
PNDIS_PACKET Packet,
|
|
UCHAR *irPacketBuf,
|
|
UINT irPacketBufLen,
|
|
UINT *irPacketLen
|
|
)
|
|
{
|
|
PNDIS_BUFFER CurrentBuffer, NextBuffer;
|
|
UINT CurrentLength;
|
|
PVOID VirtualAddress;
|
|
PNDIS_BUFFER ndisBuf;
|
|
UINT i, ndisPacketBytes = 0, I_fieldBytes, totalBytes = 0;
|
|
UINT ndisPacketLen, numExtraBOFs;
|
|
SIR_FCS_TYPE fcs;
|
|
UCHAR nextChar;
|
|
UCHAR *bufData;
|
|
UINT bufLen;
|
|
PNDIS_IRDA_PACKET_INFO packetInfo = GetPacketInfo(Packet);
|
|
|
|
|
|
// Get the packet's entire length and its first NDIS buffer
|
|
NdisQueryPacket(Packet, NULL, NULL, &ndisBuf, &ndisPacketLen);
|
|
|
|
// Make sure that the packet is big enough to be legal.
|
|
// It consists of an A, C, and variable-length I field.
|
|
if (ndisPacketLen < ADDR_SIZE + CONTROL_SIZE){
|
|
// DBGERR(("packet too short in NdisToIrPacket (%d bytes)", ndisPacketLen));
|
|
return (FALSE);
|
|
}
|
|
else {
|
|
I_fieldBytes = ndisPacketLen - ADDR_SIZE - CONTROL_SIZE;
|
|
}
|
|
|
|
|
|
// Make sure that we won't overwrite our contiguous buffer.
|
|
// Make sure that the passed-in buffer can accomodate this packet's
|
|
// data no matter how much it grows through adding ESC-sequences, etc.
|
|
if (ndisPacketLen > MK7_MAXIMUM_PACKET_SIZE) {
|
|
// The packet is too large
|
|
// Tell the caller to retry with a packet size large
|
|
// enough to get past this stage next time.
|
|
//DBGERR(("Packet too large in NdisToIrPacket (%d=%xh bytes), MAX_IRDA_DATA_SIZE=%d, irPacketBufLen=%d.", ndisPacketLen, ndisPacketLen, MAX_IRDA_DATA_SIZE, irPacketBufLen));
|
|
*irPacketLen = ndisPacketLen;
|
|
return (FALSE);
|
|
}
|
|
|
|
if (!ndisBuf) {
|
|
// DBGERR(("No NDIS_BUFFER in NdisToIrPacket"));
|
|
return (FALSE);
|
|
}
|
|
|
|
|
|
CurrentBuffer = ndisBuf;
|
|
while (CurrentBuffer != NULL) {
|
|
NdisQueryBufferSafe(CurrentBuffer, &VirtualAddress, &CurrentLength, 16);
|
|
if (!VirtualAddress) {
|
|
#if DBG
|
|
DbgPrint("==> Throw Away Failed Packet\n\r");
|
|
#endif
|
|
return (FALSE);
|
|
}
|
|
NdisGetNextBuffer(CurrentBuffer, &NextBuffer);
|
|
CurrentBuffer = NextBuffer;
|
|
}
|
|
|
|
// NDIS requirement
|
|
// NdisQueryBuffer(ndisBuf, (PVOID *)&bufData, &bufLen);
|
|
NdisQueryBufferSafe(ndisBuf, (PVOID *)&bufData, &bufLen,16);
|
|
|
|
/*
|
|
* Now begin building the IR frame.
|
|
*
|
|
* This is the final format:
|
|
*
|
|
* extra BOFs ...
|
|
* BOF (1)
|
|
* NdisMediumIrda packet (what we get from NDIS):
|
|
* Address (1)
|
|
* Control (1)
|
|
* FCS (2)
|
|
* EOF (1)
|
|
*/
|
|
|
|
// Prepend BOFs (extra BOFs + 1 actual BOF)
|
|
// 4.1.0
|
|
if ((Adapter->HwVersion==HW_VER_1) && (Adapter->CurrentSpeed <= MAX_SIR_SPEED))
|
|
numExtraBOFs = HW_VER_1_EBOFS;
|
|
else
|
|
numExtraBOFs = packetInfo->ExtraBOFs;
|
|
|
|
|
|
if (numExtraBOFs > MAX_EXTRA_SIR_BOFS) {
|
|
numExtraBOFs = MAX_EXTRA_SIR_BOFS;
|
|
}
|
|
for (i = totalBytes = 0; i < numExtraBOFs; i++) {
|
|
*(SIR_BOF_TYPE *)(irPacketBuf+totalBytes) = SIR_EXTRA_BOF;
|
|
totalBytes += SIR_EXTRA_BOF_SIZE;
|
|
}
|
|
*(SIR_BOF_TYPE *)(irPacketBuf+totalBytes) = SIR_BOF;
|
|
totalBytes += SIR_BOF_SIZE;
|
|
|
|
fcs = 0xffff;
|
|
|
|
// Fill TX buff w/ I data & calculate FCS as we go
|
|
for (i=0; i<ndisPacketLen; i++) {
|
|
|
|
ASSERT(bufData);
|
|
nextChar = *bufData++;
|
|
fcs = (fcs >> 8) ^ fcsTable[(fcs ^ nextChar) & 0xff];
|
|
|
|
totalBytes += EscapeSlowIrData(&irPacketBuf[totalBytes], nextChar);
|
|
|
|
if (--bufLen==0) {
|
|
NdisGetNextBuffer(ndisBuf, &ndisBuf);
|
|
if (ndisBuf) {
|
|
// NDIS requriement
|
|
// NdisQueryBuffer(ndisBuf, (PVOID *)&bufData, &bufLen);
|
|
NdisQueryBufferSafe(ndisBuf, (PVOID *)&bufData, &bufLen,16);
|
|
}
|
|
else {
|
|
bufData = NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
if (bufData != NULL) {
|
|
// Packet was corrupt -- it misreported its size.
|
|
// DBGERR(("Packet corrupt in NdisToIrPacket (buffer lengths don't add up to packet length)."));
|
|
*irPacketLen = 0;
|
|
return (FALSE);
|
|
}
|
|
|
|
fcs = ~fcs;
|
|
|
|
// Put in the 16-bit FCS
|
|
totalBytes += EscapeSlowIrData(&irPacketBuf[totalBytes], (UCHAR)(fcs&0xff));
|
|
totalBytes += EscapeSlowIrData(&irPacketBuf[totalBytes], (UCHAR)(fcs>>8));
|
|
|
|
// EOF
|
|
*(SIR_EOF_TYPE *)&irPacketBuf[totalBytes] = SIR_EOF;
|
|
totalBytes += SIR_EOF_SIZE;
|
|
|
|
*irPacketLen = totalBytes;
|
|
|
|
// DBGOUT(("... NdisToIrPacket converted %d-byte ndis pkt to %d-byte irda pkt:", ndisPacketLen, *irPacketLen));
|
|
|
|
return (TRUE);
|
|
}
|
|
|
|
|
|
|
|
//----------------------------------------------------------------------
|
|
// Procedure: [ComputeSirFCS]
|
|
//
|
|
//----------------------------------------------------------------------
|
|
USHORT ComputeSirFCS(UCHAR *data, UINT dataLen)
|
|
{
|
|
USHORT fcs = 0xffff;
|
|
UINT i;
|
|
|
|
// DBGOUT(("ComputeSirFCS() on %d-byte buffer.", dataLen));
|
|
|
|
for (i = 0; i < dataLen; i++){
|
|
fcs = (fcs >> 8) ^ fcsTable[(fcs ^ *data++) & 0xff];
|
|
}
|
|
|
|
fcs = ~fcs;
|
|
|
|
// DBGOUT(("ComputeFCS returning %d=0x%x.", (UINT)fcs, (UINT)fcs));
|
|
|
|
return (fcs);
|
|
}
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Procedure: [ProcRXSir]
|
|
//
|
|
//-----------------------------------------------------------------------------
|
|
BOOLEAN ProcRXSir(UCHAR *dBuff, UINT dCnt)
|
|
{
|
|
USHORT fcs;
|
|
|
|
|
|
// FCS is not computed over the FCS field. Need to look into this.
|
|
// (It seems when the original FCS is included in the calculation,
|
|
// we should get GOOD_FCS for result.)
|
|
|
|
fcs = ComputeSirFCS(dBuff, dCnt);
|
|
|
|
if (fcs != GOOD_FCS)
|
|
return (FALSE);
|
|
|
|
return (TRUE);
|
|
}
|