text: /* $Id: if_le_dec.c,v 1.1 1998/08/20 08:27:10 dfr Exp $ */
  /*	$NetBSD: if_le_dec.c,v 1.8 1997/07/22 04:32:21 jonathan Exp $	*/
  
  /*-
   * Copyright (c) 1997 Jonathan Stone. All rights reserved.
   * Copyright (c) 1995 Charles M. Hannum.  All rights reserved.
   * Copyright (c) 1992, 1993
   *	The Regents of the University of California.  All rights reserved.
   *
   * This code is derived from software contributed to Berkeley by
   * Ralph Campbell and Rick Macklem.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   * 3. All advertising materials mentioning features or use of this software
   *    must display the following acknowledgement:
   *	This product includes software developed by the University of
   *	California, Berkeley and its contributors.
   * 4. Neither the name of the University nor the names of its contributors
   *    may be used to endorse or promote products derived from this software
   *    without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   *
   *	@(#)if_le.c	8.2 (Berkeley) 11/16/93
   */
  
  #include "bpfilter.h"
  #include <sys/param.h>
  #include <sys/systm.h>
  #include <sys/kernel.h>
  #include <sys/module.h>
  #include <sys/bus.h>
  #include <sys/mbuf.h>
  #include <sys/syslog.h>
  #include <sys/socket.h>
  #include <sys/device.h>
  
  #include <net/if.h>
  #include <net/netisr.h>
  
  #include <netinet/in.h>
  #include <netinet/in_systm.h>
  #include <netinet/in_var.h>
  #include <netinet/ip.h>
  #include <netinet/if_ether.h>
  #include <net/if_media.h>
  
  #ifdef INET
  #include <netinet/in.h>
  #include <netinet/if_inarp.h>
  #endif
  
  #include <alpha/tc/am7990reg.h>
  #include <alpha/tc/am7990var.h>
  
  #include <alpha/tc/if_levar.h>
  #include <alpha/tc/tcreg.h>
  #include <alpha/tc/tcvar.h>
  #include <alpha/tc/ioasicvar.h>
  #include <machine/clock.h>
  
  
  /* access LANCE registers */
  void le_dec_writereg __P((volatile u_short *regptr, u_short val));
  #define	LERDWR(cntl, src, dst)	{ (dst) = (src); tc_mb(); }
  #define	LEWREG(src, dst)	le_dec_writereg(&(dst), (src))
  
  hide void le_dec_wrcsr __P((struct am7990_softc *, u_int16_t, u_int16_t));
  hide u_int16_t le_dec_rdcsr __P((struct am7990_softc *, u_int16_t));  
  char *ether_sprintf(char *);
  void
  dec_le_common_attach(sc, eap)
  	struct am7990_softc *sc;
  	u_char *eap;
  {
  	int i;
  
  	sc->sc_rdcsr = le_dec_rdcsr;
  	sc->sc_wrcsr = le_dec_wrcsr;
  	sc->sc_hwinit = NULL;
  
  	sc->sc_conf3 = 0;
  	sc->sc_addr = 0;
  	sc->sc_memsize = 65536;
  
  	/*
  	 * Get the ethernet address out of rom
  	 */
  	for (i = 0; i < sizeof(sc->sc_enaddr); i++) {
  		sc->sc_enaddr[i] = *eap;
  		eap += 4;
  	}
  	am7990_config(sc);
  }
  
  hide void
  le_dec_wrcsr(sc, port, val)
  	struct am7990_softc *sc;
  	u_int16_t port, val;
  {
  	struct lereg1 *ler1 = ((struct le_softc *)sc)->sc_r1;
  	LEWREG(port, ler1->ler1_rap);
  	LERDWR(port, val, ler1->ler1_rdp);
  }
  
  hide u_int16_t
  le_dec_rdcsr(sc, port)
  	struct am7990_softc *sc;
  	u_int16_t port;
  {
  	struct lereg1 *ler1 = ((struct le_softc *)sc)->sc_r1;
  	u_int16_t val;
  	LEWREG(port, ler1->ler1_rap);
  	LERDWR(0, ler1->ler1_rdp, val);
  	return (val);
  }
  
  /*
   * Write a lance register port, reading it back to ensure success. This seems
   * to be necessary during initialization, since the chip appears to be a bit
   * pokey sometimes.
   */
  void
  le_dec_writereg(regptr, val)
  	register volatile u_short *regptr;
  	register u_short val;
  {
  	register int i = 0;
  	while (*regptr != val) {
  		*regptr = val;
  		tc_mb();
  		if (++i > 10000) {
  			printf("le: Reg did not settle (to x%x): x%x\n", val,
  			    *regptr);
  			return;
  		}
  		DELAY(100);
  	}
  }
  
  /*
   * Routines for accessing the transmit and receive buffers are provided
   * by am7990.c, because of the LE_NEED_BUF_* macros defined above.
   * Unfortunately, CPU addressing of these buffers is done in one of
   * 3 ways:
   * - contiguous (for the 3max and turbochannel option card)
   * - gap2, which means shorts (2 bytes) interspersed with short (2 byte)
   *   spaces (for the pmax, vax 3400, and ioasic LANCE descriptors)
   * - gap16, which means 16bytes interspersed with 16byte spaces
   *   for buffers which must begin on a 32byte boundary (for 3min, maxine,
   *   and alpha)
   * The buffer offset is the logical byte offset, assuming contiguous storage.
   */
  