FreeBSD/Linux Kernel Cross Reference
sys/dev/dec/if_le_dec.c

     /*      $OpenBSD: if_le_dec.c,v 1.4 2007/06/18 21:24:43 jasper Exp $    */
     /*      $NetBSD: if_le_dec.c,v 1.12 2001/11/13 12:49:45 lukem 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. 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 <sys/param.h>
    #include <sys/systm.h>
    #include <sys/mbuf.h>
    #include <sys/syslog.h>
    #include <sys/socket.h>
    #include <sys/device.h>
    
    #include <net/if.h>
    #include <net/if_media.h>
    
    #ifdef INET
    #include <netinet/in.h>
    #include <netinet/if_ether.h>
    #endif
    
    #include <dev/ic/am7990reg.h>
    #include <dev/ic/am7990var.h>
    
    #include <dev/tc/if_levar.h>
    #include <dev/tc/tcvar.h>
    
    #include <machine/bus.h>
    
    /* access LANCE registers */
    void le_dec_writereg(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))
    
    void le_dec_wrcsr(struct am7990_softc *, u_int16_t, u_int16_t);
    u_int16_t le_dec_rdcsr(struct am7990_softc *, u_int16_t);
    
    void
    dec_le_common_attach(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_arpcom.ac_enaddr); i++) {
                    sc->sc_arpcom.ac_enaddr[i] = *eap;
                    eap += 4;
            }
    
            am7990_config(sc);
    }
    
    void
    le_dec_wrcsr(struct am7990_softc *sc, u_int16_t port, u_int16_t val)
    {
            struct lereg1 *ler1 = ((struct le_softc *)sc)->sc_r1;
    
           LEWREG(port, ler1->ler1_rap);
           LERDWR(port, val, ler1->ler1_rdp);
   }
   
   u_int16_t
   le_dec_rdcsr(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(volatile u_short *regptr, u_short val)
   {
           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.
    */

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