Re: [ECOS] LAN9218 driver porting problem

["m mariga" <ma_ariga at yahoo dot co dot jp>]

Hello,

Thank you, Gary, for your answer.
Honestly, I do not understand completely, but I anyhow made recved routines 
as follows.
Do you think it works ?
Don't bother. I just want to thank you.

<lan9x18_RxEvent>
I can get used-space of STATUS_FIFO(=all DWORDs) & DATA_FIFO(=all recved 
data length) from RX_FIFO_INF Register
so, I read both values and setted  used-space of STATUS_FIFO into 
cpd->rxpacket,
and used-space of DATA_FIFO into len.

<lan9x18_recv>
I get each packet-length from STATUS_FIFO and deployed all data into 
sg_list[i].buf.

static void
lan9x18_RxEvent(struct eth_drv_sc *sc)
{
   struct lan9x18_priv_data *cpd =
       (struct lan9x18_priv_data *)sc->driver_private;
   DWORD stat,len;

   DEBUG_FUNCTION();

// get used space of STATUS_FIFO & DATA_FIFO from RX_FIFO_INF
stat=get_reg32(sc, RX_FIFO_INF);   //RX_FIFO_INF (0x7CUL)
if(stat&0x00FF0000UL) {            //RXSUSED!=0
 cpd->rxpacket = ((stat&0x00FF0000UL)>>16);  //RXSUSED set
 len=stat&0x0000FFFFUL;                      //RXDUSED set
}
else{
#if DEBUG & 1
       db_printf("#####RxEvent with empty fifo\n");
#endif
 return;
}

   INCR_STAT( rx_count );

#if DEBUG & 1
   db_printf("RxEvent - STATUS_FIFOs: 0x%08x\n", stat);
#endif

   get_data_init(sc);

//Rx status is available, read it
stat=get_reg32(sc, RX_STATUS_FIFO);  //RX_STATUS_FIFO      (0x40UL)

#ifdef KEEP_STATISTICS
//    if ( stat & LAN9x18_RX_STATUS_ALIGNERR ) INCR_STAT( rx_align_errors );
   //if ( stat & LAN9x18_RX_STATUS_BCAST    ) INCR_STAT(  );
   if ( stat & 0x00000002 ) INCR_STAT( rx_crc_errors );
   if ( stat & 0x00000008  ) INCR_STAT( rx_too_long_frames );
   if ( stat & 0x00000800 ) INCR_STAT( rx_short_frames );
   //if ( stat & LAN9x18_RX_STATUS_MCAST    ) INCR_STAT(  );
#endif // KEEP_STATISTICS

// Error check
//    if ((stat & LAN9x18_RX_STATUS_BAD) == 0)
   if ((stat & RX_STS_ES_) == 0)            //RX_STS_ES_   (0x00008000UL)
   {
       INCR_STAT( rx_good );
       // Then it's OK

#if DEBUG & 1
       db_printf("RxEvent good rx - stat: 0x%08x, len: 0x%08x\n", stat, 
len);
#endif
       // Check for bogusly short packets; can happen in promisc mode:
       // Asserted against and checked by upper layer driver.
#ifdef CYGPKG_NET
       if ( len > sizeof( struct ether_header ) )
           // then it is acceptable; offer the data to the network stack
#endif
       (sc->funs->eth_drv->recv)(sc, len);

       return;
   }

   // Not OK for one reason or another...

}

static void
lan9x18_recv(struct eth_drv_sc *sc, struct eth_drv_sg *sg_list, int sg_len)
{
   struct lan9x18_priv_data *cpd =
       (struct lan9x18_priv_data *)sc->driver_private;

   int i;
//    short mlen=0, plen;
   cyg_uint8 *data=NULL;
   short val;
   unsigned char *cp, cval;
DWORD mlen=0,stat,plen=0;

   DEBUG_FUNCTION();

   INCR_STAT( rx_deliver );

   get_data_init(sc);

   for (i = 0;  i < sg_len; ) {
       int clen;
       if(mlen==0){
        data = (cyg_uint8 *)sg_list[i].buf;
        mlen = sg_list[i].len;
 }
 if(plen==0){
  //RX_STATUS_FIFO      (0x40UL)
  if((stat=get_reg32(sc, RX_STATUS_FIFO))==0){
#if DEBUG & 1
      db_printf("RX_STATUS_FIFO empty\n");
#endif
   goto DONE;
  }
  plen=((stat&0x3FFF0000UL)>>16);
  cpd->data_pos=sizeof(rxd_t);
 }
       clen = mlen;
       if( clen > plen )
           clen = plen;

#if DEBUG & 1
       db_printf("%s : mlen 0x%08x plen 0x%08x clen 0x%08x\n", 
__FUNCTION__, mlen, plen, clen);
#endif
       mlen -= clen;
       plen -= clen;
       if (data) {
           while( clen > 0 ) {
               *data++ = get_data_byte(sc);
               clen--;
           }
       }
       else { // must actively discard ie. read it from the chip anyway.
#if DEBUG & 1
           db_printf("lan9x18_recv: No data!!!!!\n");
#endif
           while( clen > 0 ) {
               (void)get_data_byte(sc);
               clen--;
           }
       }
#if DEBUG & 1
       diag_dump_buf( sg_list[i].buf, sg_list[i].len > 64 ? 64 : 
sg_list[i].len );
#endif
 if(mlen==0)
  i++;
   }

DONE:
return;
}

Since hardware has not yet made,I can't run my program.
Until then I am just only crossing my fingers.
Thanks your help again.

m mariga


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