The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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

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    1 /*      $OpenBSD: if_le_dec.c,v 1.4 2007/06/18 21:24:43 jasper Exp $    */
    2 /*      $NetBSD: if_le_dec.c,v 1.12 2001/11/13 12:49:45 lukem Exp $     */
    3 
    4 /*-
    5  * Copyright (c) 1997 Jonathan Stone. All rights reserved.
    6  * Copyright (c) 1995 Charles M. Hannum.  All rights reserved.
    7  * Copyright (c) 1992, 1993
    8  *      The Regents of the University of California.  All rights reserved.
    9  *
   10  * This code is derived from software contributed to Berkeley by
   11  * Ralph Campbell and Rick Macklem.
   12  *
   13  * Redistribution and use in source and binary forms, with or without
   14  * modification, are permitted provided that the following conditions
   15  * are met:
   16  * 1. Redistributions of source code must retain the above copyright
   17  *    notice, this list of conditions and the following disclaimer.
   18  * 2. Redistributions in binary form must reproduce the above copyright
   19  *    notice, this list of conditions and the following disclaimer in the
   20  *    documentation and/or other materials provided with the distribution.
   21  * 3. Neither the name of the University nor the names of its contributors
   22  *    may be used to endorse or promote products derived from this software
   23  *    without specific prior written permission.
   24  *
   25  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   27  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   28  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   29  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   30  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   31  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   32  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   33  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   34  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   35  * SUCH DAMAGE.
   36  *
   37  *      @(#)if_le.c     8.2 (Berkeley) 11/16/93
   38  */
   39 
   40 #include <sys/param.h>
   41 #include <sys/systm.h>
   42 #include <sys/mbuf.h>
   43 #include <sys/syslog.h>
   44 #include <sys/socket.h>
   45 #include <sys/device.h>
   46 
   47 #include <net/if.h>
   48 #include <net/if_media.h>
   49 
   50 #ifdef INET
   51 #include <netinet/in.h>
   52 #include <netinet/if_ether.h>
   53 #endif
   54 
   55 #include <dev/ic/am7990reg.h>
   56 #include <dev/ic/am7990var.h>
   57 
   58 #include <dev/tc/if_levar.h>
   59 #include <dev/tc/tcvar.h>
   60 
   61 #include <machine/bus.h>
   62 
   63 /* access LANCE registers */
   64 void le_dec_writereg(volatile u_short *regptr, u_short val);
   65 #define LERDWR(cntl, src, dst)  { (dst) = (src); tc_mb(); }
   66 #define LEWREG(src, dst)        le_dec_writereg(&(dst), (src))
   67 
   68 void le_dec_wrcsr(struct am7990_softc *, u_int16_t, u_int16_t);
   69 u_int16_t le_dec_rdcsr(struct am7990_softc *, u_int16_t);
   70 
   71 void
   72 dec_le_common_attach(struct am7990_softc *sc, u_char *eap)
   73 {
   74         int i;
   75 
   76         sc->sc_rdcsr = le_dec_rdcsr;
   77         sc->sc_wrcsr = le_dec_wrcsr;
   78         sc->sc_hwinit = NULL;
   79 
   80         sc->sc_conf3 = 0;
   81         sc->sc_addr = 0;
   82         sc->sc_memsize = 65536;
   83 
   84         /*
   85          * Get the ethernet address out of rom
   86          */
   87         for (i = 0; i < sizeof(sc->sc_arpcom.ac_enaddr); i++) {
   88                 sc->sc_arpcom.ac_enaddr[i] = *eap;
   89                 eap += 4;
   90         }
   91 
   92         am7990_config(sc);
   93 }
   94 
   95 void
   96 le_dec_wrcsr(struct am7990_softc *sc, u_int16_t port, u_int16_t val)
   97 {
   98         struct lereg1 *ler1 = ((struct le_softc *)sc)->sc_r1;
   99 
  100         LEWREG(port, ler1->ler1_rap);
  101         LERDWR(port, val, ler1->ler1_rdp);
  102 }
  103 
  104 u_int16_t
  105 le_dec_rdcsr(struct am7990_softc *sc, u_int16_t port)
  106 {
  107         struct lereg1 *ler1 = ((struct le_softc *)sc)->sc_r1;
  108         u_int16_t val;
  109 
  110         LEWREG(port, ler1->ler1_rap);
  111         LERDWR(0, ler1->ler1_rdp, val);
  112         return (val);
  113 }
  114 
  115 /*
  116  * Write a lance register port, reading it back to ensure success. This seems
  117  * to be necessary during initialization, since the chip appears to be a bit
  118  * pokey sometimes.
  119  */
  120 void
  121 le_dec_writereg(volatile u_short *regptr, u_short val)
  122 {
  123         int i = 0;
  124 
  125         while (*regptr != val) {
  126                 *regptr = val;
  127                 tc_mb();
  128                 if (++i > 10000) {
  129                         printf("le: Reg did not settle (to x%x): x%x\n", val,
  130                             *regptr);
  131                         return;
  132                 }
  133                 DELAY(100);
  134         }
  135 }
  136 
  137 /*
  138  * Routines for accessing the transmit and receive buffers are provided
  139  * by am7990.c, because of the LE_NEED_BUF_* macros defined above.
  140  * Unfortunately, CPU addressing of these buffers is done in one of
  141  * 3 ways:
  142  * - contiguous (for the 3max and turbochannel option card)
  143  * - gap2, which means shorts (2 bytes) interspersed with short (2 byte)
  144  *   spaces (for the pmax, vax 3400, and ioasic LANCE descriptors)
  145  * - gap16, which means 16bytes interspersed with 16byte spaces
  146  *   for buffers which must begin on a 32byte boundary (for 3min, maxine,
  147  *   and alpha)
  148  * The buffer offset is the logical byte offset, assuming contiguous storage.
  149  */

Cache object: 51328a87c2cd3014cac4b356108c251b


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