etherne.c

三星公司的ARM44B0的TCPIP测试程序

        if (lolen > 0xfc)
            hilen++;
        len = (hilen<<8) + lolen;
        if (len != nichdr.len)          /* ..and compare with actual value */
        {
            if (netdebug)
                Uart_Printf("  NIC length mismatch %Xh - %Xh\n", len, nichdr.len);
        }
#else
        len = nichdr.len;               /* Take length from stored header */
#endif
        if ((nichdr.stat&1) && len>=MINFRAMEC && len<=MAXFRAMEC)
        {                               /* If hdr is OK, get packet */
            len -= CRCLEN;              /* ..without CRC! */
            if (pkt)
                getnic((WORD)((cp->next_pkt<<8)+sizeof(nichdr)), pkt, len);
        }
        else                            /* If not, no packet data */
        {
            Uart_Printf("  NIC packet error\n");
        }                               /* Update next packet ptr */
        if (nichdr.next>=RXSTART && nichdr.next<RXSTOP)
            cp->next_pkt = nichdr.next;
        else                            /* If invalid, use prev+1 */
        {
            Uart_Printf("  NIC pointer error\n");
            cp->next_pkt = nicwrap(cp->next_pkt + 1);
        }                               /* Update boundary register */
        bnry = nicwrap(cp->next_pkt - 1);
        //outnic(BNRY, bnry);
        BNRY=bnry;
    }
    return(len);                        /* Return length excl. CRC */
}

/* Send Ethernet packet given len excl. CRC, return 0 if NIC is busy */
WORD put_etherne(WORD dtype, void *pkt, WORD len)
{
    CONFIGNE *cp;

    cp = &configs[dtype & NETNUM_MASK];
    ebase = cp->ebase;
    //if (!ebase || innic(CMDR) & 4)      /* If still Txing, return 0 */
    if(!ebase || CMDR & 4)
        len = 0;
    else if (pkt)
    {                                   /* If last Tx is complete.. */
        len = minw(MAXFRAME, maxw(MINFRAME, len));      /* Constrain length */
        memcpy((BYTE *)pkt+MACLEN, cp->myeth, MACLEN);  /* Set source addr */
        //outnic(ISR, 0x0a);             
        ISR=0x0a;                         /* Clear interrupt flags */
        //outnic(TBCR0, len & 0xff);   
        TBCR0=len&0xff;                   /* Set Tx length regs */
        //outnic(TBCR1, len >> 8);
        TBCR1=len>>8;
        putnic(TXSTART<<8, pkt, len);
        //outnic(CMDR, 0x24);
        CMDR=0x24;                        /* Transmit the packet */
    }
    return(len);
}

/* Reset the Ethernet card, if 'cold' start, get my 6-byte address */
void resetnic(CONFIGNE *cp, char cold)
{
    int i;
//    BYTE temp[MACLEN*2];

    //outnic(CMDR, 0x21); 
    CMDR=0x21;                          /* Stop, DMA abort, page 0 */
    
    SoftDelay(10);                           /* ..wait to take effect */
   
    //outnic(DCR, DCRVAL);
    DCR=DCRVAL;
    //outnic(RBCR0, 0);
    RBCR0=0;                            /* Clear remote byte count */
    //outnic(RBCR1, 0);
    RBCR1=0;
    //outnic(RCR, 0x20);
    RCR=0x20;                           /* Rx monitor mode */
    //outnic(TCR, 0x02);   
    TCR=0x02;                           /* Tx internal loopback */
    //outnic(TPSR, TXSTART);
    TPSR=TXSTART;                       /* Set Tx start page 0x40*/
    //outnic(PSTART, RXSTART); 
    PSTART=RXSTART;                     /* Set Rx start 0x46, stop, boundary */
    //outnic(PSTOP, RXSTOP);            //0x7e
    PSTOP=RXSTOP;
    //outnic(BNRY, (BYTE)(RXSTOP-1));
    BNRY=(BYTE)(RXSTOP-1);             //0x7d?
    //outnic(ISR, 0xff); 
    ISR=0xff;                           /* Clear interrupt flags */
    //outnic(IMR, 0);
    IMR=0;                              /* Mask all interrupts */
    if (cold)
    {
       //outnic(CMDR, 0x22);
       // CMDR=0x22;                       /* Start NIC, DMA abort */
       // SoftDelay(10);
       // getnic(0, temp, 16);            /* Get 6-byte addr */
        for (i=0; i<MACLEN; i++)        /* Convert addr words to bytes */
            cp->myeth[i] = MYMAC[i];//temp[WORDMODE ? i+i : i];
    }
    //outnic(CMDR, 0x61);                
    CMDR=0x61;                          /* Stop, DMA abort, page 1 */
    SoftDelay(10);
    //for (i=0; i<6; i++)                 /* Set Phys addr */
        //outnic(PAR0+i, cp->myeth[i]);
        PAR0=cp->myeth[0];
        PAR1=cp->myeth[1];
        PAR2=cp->myeth[2];
        PAR3=cp->myeth[3];
        PAR4=cp->myeth[4];
        PAR5=cp->myeth[5];
    //for (i=0; i<8; i++)                 /* Multicast accept-all */
      //outnic(MAR0+i, 0xff);
         MAR0=0xff;
         MAR1=0xff;
         MAR2=0xff;
         MAR3=0xff;
         MAR4=0xff;
         MAR5=0xff;
         MAR6=0xff;
         MAR7=0xff;
    //outnic(CURR, RXSTART+1);
    CURR=RXSTART+1;                     /* Set current Rx page */
    cp->next_pkt = RXSTART + 1;
    //outnic(CMDR, 0x20);
    CMDR=0x20;                          /* DMA abort, page 0 */
    //outnic(RCR, promisc ? 0x14 : 0x04); 
    RCR=promisc ? 0x14 : 0x04;          /* Allow broadcasts, maybe all pkts */
    //outnic(TCR, 0);                  
    TCR=0;                              /* Normal Tx operation */
    //outnic(ISR, 0xff);
    ISR=0xff;                           /* Clear interrupt flags */
    //outnic(CMDR, 0x22);
    CMDR=0x22;                          /* Start NIC */
}

/* Get a packet from a given address in the NIC's RAM */
void getnic(WORD addr, BYTE data[], WORD len)
{
     register int count;
     register WORD *dataw;
	 int temp;
     
    count = WORDMODE ? len>>1 : len;    // Halve byte count if word I/P 
    //dataport = ebase + DATAPORT<<8;     // Address of NIC data port 
    //outnic(ISR, 0x40);
    ISR=0x40;                           // Clear remote DMA interrupt flag 
    //outnic(RBCR0, len&0xff);
    temp=len&0xff;
    RBCR0=len&0xff;                     // Byte count 
    //outnic(RBCR1, len>>8);
    temp=len>>8;
    RBCR1=len>>8;
    //outnic(RSAR0, addr&0xff);
    temp=addr&0xff;
    RSAR0=addr&0xff;                    // Data addr 
    //outnic(RSAR1, addr>>8);
    temp=addr>>8;
    RSAR1=addr>>8;
    //outnic(CMDR, 0x0a);
    CMDR=0x0a;                          // Start, DMA remote read 
    Delay(1);
#if WORDMODE
//    if(WORDMODE==1)
      dataw = (WORD *)data;               // Use pointer for speed 
      while(count--)                      // Get words 
          *dataw++ =DATAPORT;//*(WORD*)(dataport);
      if (len & 1)                        // If odd length, do last byte 
          *(BYTE*)dataw =DATAPORT;//*(BYTE*)(dataport);
#else
//    else
    while(count--)
        *data++= DATAPORT;//*(BYTE*)(dataport);
#endif
   
}

/* Put a packet into a given address in the NIC's RAM */
void putnic(WORD addr, BYTE data[], WORD len)
{
    register int count;
    register WORD *dataw;//, dataport;

    len += len & 1;                     /* Round length up to an even value */
    count = WORDMODE ? len>>1 : len;    /* Halve byte count if word O/P */
    //dataport = ebase + DATAPORT<<8;        /* Address of NIC data port */
    //outnic(ISR, 0x40); 
    ISR=0x40;                           /* Clear remote DMA interrupt flag */
    //outnic(RBCR0, len&0xff);
    RBCR0=len&0xff;                     /* Byte count */
    //outnic(RBCR1, len>>8);
    RBCR1=len>>8;
    //outnic(RSAR0, addr&0xff);  
    RSAR0=addr&0xff;                    /* Data addr */
    //outnic(RSAR1, addr>>8);
    RSAR1=addr>>8;
    //outnic(CMDR, 0x12);
    CMDR=0x12;                          /* Start, DMA remote write */
#if WORDMODE                            /* Word transfer? */
    dataw = (WORD *)data;
    while(count--)
        //*(WORD*)(dataport)=*dataw++;    //outpw(dataport, *dataw++);  /* O/P words */
        DATAPORT=*dataw++;
#else
    while(count--)                      /* O/P bytes */
        //*(BYTE*)(dataport)=*data++;     //outp(dataport, *data++);
        DATAPORT=*data++;
#endif
    count = 10000;                      /* Done: must ensure DMA complete */
    //isrtemp=ISR;
    while(count && (ISR&0x40)==0)
        count--;
}

/* Wrap an NIC Rx page number */
BYTE nicwrap(int page)
{
   if (page >= RXSTOP)
       page += RXSTART - RXSTOP;
   else if (page < RXSTART)
       page += RXSTOP - RXSTART;
   return(page);
}

/* Input a byte from a NIC register 
BYTE innic(int reg)
{
    //return(inp((WORD)(ebase+reg)));
    //return(*((volatile BYTE*)(ebase+(((LWORD)(reg))<<8))));
}
//Output a byte to a NIC register 
void outnic(int reg, int b)
{
    //outp((WORD)(ebase+reg), b);
    //Uart_Printf("\nOUTNIC");
    *((volatile WORD*)(ebase+(((LWORD)(reg))<<8)))=b;
    
}*/

/* EOF */