#include "netcfg.h"
#include "netdef.h"
#include "netsys.h"
#include "mem.h"
#include "netif.h"
#include "ne2kif.h"
static UINT8 StartPageOfPacket;
static UINT8 LastSendStartPage;
/*==============================================================
Function:
Description:
Parameters:
Returns:
Notes:
==============================================================*/
void NE2KIfInit(PNETIF pNetIf, UINT32 NeBase)
{
int i;
for(i=0; i < RTL_DELAY_AFTER_HARDWARE_RESET; i++);
NE2K_OUT(0, NE_RESET);
i = NE2K_IN(NE_RESET);
NE2K_OUT(CMD_PAGE1 | CMD_NODMA | CMD_STOP, NE_CR);
NE2K_OUT(RECV_START + 1, NE_CURR);
NE2K_OUT(pNetIf->MAC[0], NE_PAR0);
NE2K_OUT(pNetIf->MAC[1], NE_PAR1);
NE2K_OUT(pNetIf->MAC[2], NE_PAR2);
NE2K_OUT(pNetIf->MAC[3], NE_PAR3);
NE2K_OUT(pNetIf->MAC[4], NE_PAR4);
NE2K_OUT(pNetIf->MAC[5], NE_PAR5);
NE2K_OUT(CMD_PAGE0 | CMD_NODMA | CMD_STOP, NE_CR);
NE2K_OUT(TCR_LOOP_INT, NE_TCR);
NE2K_OUT(RECV_START, NE_PSTART);
NE2K_OUT(RECV_STOP, NE_PSTOP);
NE2K_OUT(RECV_START, NE_BNRY);
NE2K_OUT(SEND_PAGE0, NE_TPSR);
NE2K_OUT(RCR_AB, NE_RCR);
NE2K_OUT(0, NE_RBCR0);
NE2K_OUT(0, NE_RBCR1);
NE2K_OUT(DCR_LS | DCR_FIFO8 | DCR_WTS_BOS, NE_DCR);
NE2K_OUT(ISR_OVW | ISR_PRX | ISR_RXE, NE_IMR);
NE2K_OUT(0xff, NE_ISR);
NE2K_OUT(TCR_LOOP_NONE, NE_TCR);
NE2K_OUT(CMD_PAGE0 |CMD_NODMA | CMD_RUN, NE_CR);
LastSendStartPage = SEND_PAGE0;
StartPageOfPacket = RECV_START + 1;
}
/*==============================================================
Function:
Description:
Parameters:
Returns:
Notes:
==============================================================*/
void NE2KIfIsr(PNETIF pNetIf, UINT32 NeBase)
{
UINT8 isr,curr;
isr = NE2K_IN(NE_ISR);
if (isr & ISR_OVW){
NE2K_OUT(ISR_OVW,NE_ISR);
}
if (isr & ISR_RXE){
NE2K_OUT(ISR_RXE,NE_ISR);
NE2KPAGE(1);
curr = NE2K_IN(NE_CURR);
NE2KPAGE(0);
NE2K_OUT(curr-1, NE_BNRY);
}
if (isr & ISR_PRX){
NE2K_OUT(ISR_PRX, NE_ISR);
pNetIf->lpInput(pNetIf);
}
NE2K_OUT(0xff, NE_ISR);
}
/*==============================================================
Function:
Description:
Parameters:
Returns:
Notes:
==============================================================*/
static void NE2KIfDMAWrite(UINT16 Count, PUINT8 pBuf, UINT32 NeBase)
{
int i;
#if DMA_TYPE==16
Count = (Count + 1) >> 1;
#endif
for (i = 0; i < Count; i ++){
#if DMA_TYPE==16
NE2K_OUT(*(((PUINT16)pBuf)+i),NE_DMA);
#else
NE2K_OUT(pBuf,NE_DMA);
#endif
}
}
/*==============================================================
Function:
Description:
Parameters:
Returns:
Notes:
==============================================================*/
void NE2KIfSend(PNETBUF pBuf, UINT32 NeBase)
{
static BOOL InSend = FALSE;
PNETBUF pt;
UINT16 TotLen;
if (InSend){
return;
}else{
InSend = TRUE;
}
for (pt = pBuf, TotLen = 0; pt != NULL; pt = pt->pSub){
TotLen += pt->TotLen;
}
if (TotLen < MIN_PACKET_LEN){
TotLen = MIN_PACKET_LEN;
}else if (TotLen > MAX_PACKET_LEN){
TotLen = MAX_PACKET_LEN;
}
if (LastSendStartPage == SEND_PAGE0){
LastSendStartPage = SEND_PAGE1;
}else{
LastSendStartPage = SEND_PAGE0;
}
NE2K_OUT(TotLen & 0xff, NE_RBCR0);
NE2K_OUT(TotLen >> 8, NE_RBCR1);
NE2K_OUT(0, NE_RSAR0);
NE2K_OUT(LastSendStartPage, NE_RSAR1);
NE2K_OUT(CMD_PAGE0 | CMD_WRITE | CMD_RUN, NE_CR);
for (pt = pBuf; pt != NULL; pt = pt->pSub){
NE2KIfDMAWrite(pt->TotLen, pt->PayLoad, NeBase);
}
NE2K_OUT(0, NE_RBCR0);
NE2K_OUT(0, NE_RBCR1);
NE2K_OUT(CMD_PAGE0 | CMD_NODMA | CMD_RUN, NE_CR);
while((NE2K_IN(NE_CR) & CR_TXP) == CR_TXP);
NE2K_OUT(LastSendStartPage, NE_TPSR);
NE2K_OUT(TotLen & 0xff, NE_TBCR0);
NE2K_OUT(TotLen >> 8, NE_TBCR1);
NE2K_OUT(CMD_PAGE0 | CMD_NODMA | CMD_XMIT | CMD_RUN, NE_CR);
InSend = FALSE;
}
/*==============================================================
Function:
Description:
Parameters:
Returns:
Notes:
==============================================================*/
static void NE2KIfDMARead(UINT16 Count, PUINT8 pBuf, UINT16 Addr, UINT32 NeBase)
{
int i;
NE2K_OUT((UINT8)(Addr>>8),NE_RSAR1);
NE2K_OUT((UINT8)Addr,NE_RSAR0);
NE2K_OUT((UINT8)(Count>>8),NE_RBCR1);
NE2K_OUT((UINT8)Count,NE_RBCR0);
NE2K_OUT(CMD_PAGE0 | CMD_READ | CMD_RUN, NE_CR);
#if DMA_TYPE==16
Count = (Count + 1) >> 1;
#endif
for (i = 0; i < Count; i ++){
#if DMA_TYPE==16
*(((PUINT16)pBuf)+i) = NE2K_IN(NE_DMA);
#else
pBuf = NE2K_IN(NE_DMA);
#endif
}
NE2K_OUT(0, NE_RBCR0);
NE2K_OUT(0, NE_RBCR1);
NE2K_OUT(CMD_PAGE0 | CMD_NODMA | CMD_RUN, NE_CR);
}
/*==============================================================
Function:
Description:
Parameters:
Returns:
Notes:
==============================================================*/
PNETBUF NE2KIfRecv(UINT32 NeBase)
{
PNETBUF pt;
UINT16 TotLen;
UINT8 PDHeader[4];
UINT8 curr,bnry;
pt = NULL;
NE2KPAGE(1);
curr = NE2K_IN(NE_CURR);
NE2KPAGE(0);
if (StartPageOfPacket >= RECV_STOP || StartPageOfPacket < RECV_START){
StartPageOfPacket = curr;
return NULL;
}
if (StartPageOfPacket == curr){
return NULL;
}
NE2KIfDMARead(4, PDHeader, (StartPageOfPacket << 8), NeBase);
TotLen = (PDHeader[2] | (PDHeader[3] << 8 ));
if (PDHeader[0] & RSR_PRX)
if (TotLen <= NE2KIF_MAX_PACKET_LEN)
if ((pt = RecvBufAlloc()) != NULL){
pt->PayLoad = pt->Data + (NETIF_HEAD_MAX_LEN - ETH_NETIF_HEAD_LEN);
pt->TotLen = TotLen - 4;
NE2KIfDMARead(pt->TotLen, pt->PayLoad, (StartPageOfPacket << 8) + 4, NeBase);
}
StartPageOfPacket = PDHeader[1];
bnry = StartPageOfPacket-1;
if (bnry < RECV_START){
bnry = RECV_STOP - 1;
}
NE2K_OUT(bnry, NE_BNRY);
return pt;
} |
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