174 lines
4.1 KiB
C
174 lines
4.1 KiB
C
/* $NetBSD: if_le_ibus.c,v 1.3 2002/01/08 17:10:28 chs Exp $ */
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/*
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* Copyright 1996 The Board of Trustees of The Leland Stanford
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* Junior University. All Rights Reserved.
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*
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* Permission to use, copy, modify, and distribute this
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* software and its documentation for any purpose and without
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* fee is hereby granted, provided that the above copyright
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* notice appear in all copies. Stanford University
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* makes no representations about the suitability of this
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* software for any purpose. It is provided "as is" without
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* express or implied warranty.
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*
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* This driver was contributed by Jonathan Stone.
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*/
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/*
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* LANCE on Decstation kn01/kn220(?) baseboard.
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*/
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#include "opt_inet.h"
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#include <sys/param.h>
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#include <sys/socket.h>
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#include <sys/systm.h>
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#include <net/if.h>
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#include <net/if_ether.h>
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#include <net/if_media.h>
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#ifdef INET
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#include <netinet/in.h>
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#include <netinet/if_inarp.h>
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#endif
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#include <dev/ic/lancevar.h>
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#include <dev/ic/am7990var.h>
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#include <dev/tc/if_levar.h>
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#include <pmax/ibus/ibusvar.h>
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#include <pmax/pmax/kn01.h>
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static void le_dec_copyfrombuf_gap2(struct lance_softc *, void *, int, int);
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static void le_dec_copytobuf_gap2(struct lance_softc *, void *, int, int);
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static void le_dec_zerobuf_gap2(struct lance_softc *, int, int);
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static int le_pmax_match(struct device *, struct cfdata *, void *);
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static void le_pmax_attach(struct device *, struct device *, void *);
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struct cfattach le_pmax_ca = {
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sizeof(struct le_softc), le_pmax_match, le_pmax_attach
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};
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extern struct cfdriver ibus_cd;
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int
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le_pmax_match(struct device *parent, struct cfdata *match, void *aux)
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{
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struct ibus_attach_args *d = aux;
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if (parent->dv_cfdata->cf_driver != &ibus_cd)
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return (0);
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if (strcmp("lance", d->ia_name) != 0)
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return (0);
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return (1);
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}
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void
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le_pmax_attach(struct device *parent, struct device *self, void *aux)
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{
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struct le_softc *lesc = (void *)self;
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struct lance_softc *sc = &lesc->sc_am7990.lsc;
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u_char *cp;
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struct ibus_attach_args *ia = aux;
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/*
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* It's on the baseboard, with a dedicated interrupt line.
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*/
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lesc->sc_r1 = (struct lereg1 *)(ia->ia_addr);
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sc->sc_mem = (void *)MIPS_PHYS_TO_KSEG1(KN01_SYS_LANCE_B_START);
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cp = (u_char *)(MIPS_PHYS_TO_KSEG1(KN01_SYS_CLOCK) + 1);
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sc->sc_copytodesc = le_dec_copytobuf_gap2;
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sc->sc_copyfromdesc = le_dec_copyfrombuf_gap2;
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sc->sc_copytobuf = le_dec_copytobuf_gap2;
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sc->sc_copyfrombuf = le_dec_copyfrombuf_gap2;
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sc->sc_zerobuf = le_dec_zerobuf_gap2;
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dec_le_common_attach(&lesc->sc_am7990, cp);
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ibus_intr_establish(parent, (void*)ia->ia_cookie, IPL_NET,
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am7990_intr, sc);
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}
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/*
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* gap2: two bytes of data followed by two bytes of pad.
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*
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* Buffers must be 4-byte aligned. The code doesn't worry about
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* doing an extra byte.
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*/
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void
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le_dec_copytobuf_gap2(struct lance_softc *sc, void *fromv, int boff, int len)
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{
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volatile caddr_t buf = sc->sc_mem;
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caddr_t from = fromv;
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volatile u_int16_t *bptr;
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if (boff & 0x1) {
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/* handle unaligned first byte */
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bptr = ((volatile u_int16_t *)buf) + (boff - 1);
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*bptr = (*from++ << 8) | (*bptr & 0xff);
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bptr += 2;
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len--;
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} else
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bptr = ((volatile u_int16_t *)buf) + boff;
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while (len > 1) {
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*bptr = (from[1] << 8) | (from[0] & 0xff);
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bptr += 2;
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from += 2;
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len -= 2;
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}
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if (len == 1)
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*bptr = (u_int16_t)*from;
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}
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void
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le_dec_copyfrombuf_gap2(struct lance_softc *sc, void *tov, int boff, int len)
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{
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volatile caddr_t buf = sc->sc_mem;
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caddr_t to = tov;
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volatile u_int16_t *bptr;
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u_int16_t tmp;
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if (boff & 0x1) {
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/* handle unaligned first byte */
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bptr = ((volatile u_int16_t *)buf) + (boff - 1);
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*to++ = (*bptr >> 8) & 0xff;
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bptr += 2;
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len--;
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} else
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bptr = ((volatile u_int16_t *)buf) + boff;
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while (len > 1) {
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tmp = *bptr;
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*to++ = tmp & 0xff;
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*to++ = (tmp >> 8) & 0xff;
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bptr += 2;
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len -= 2;
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}
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if (len == 1)
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*to = *bptr & 0xff;
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}
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static void
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le_dec_zerobuf_gap2(struct lance_softc *sc, int boff, int len)
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{
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volatile caddr_t buf = sc->sc_mem;
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volatile u_int16_t *bptr;
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if ((unsigned)boff & 0x1) {
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bptr = ((volatile u_int16_t *)buf) + (boff - 1);
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*bptr &= 0xff;
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bptr += 2;
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len--;
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} else
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bptr = ((volatile u_int16_t *)buf) + boff;
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while (len > 0) {
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*bptr = 0;
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bptr += 2;
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len -= 2;
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}
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}
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