272 lines
6.1 KiB
C
272 lines
6.1 KiB
C
/* $NetBSD: if_le_ioasic.c,v 1.3 1996/12/05 01:25:33 cgd Exp $ */
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/*
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* Copyright (c) 1996 Carnegie-Mellon University.
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* All rights reserved.
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*
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* Author: Chris G. Demetriou
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*
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* Permission to use, copy, modify and distribute this software and
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* its documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
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* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie the
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* rights to redistribute these changes.
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*/
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/*
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* LANCE on DEC IOCTL ASIC.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/mbuf.h>
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#include <sys/syslog.h>
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#include <sys/socket.h>
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#include <sys/device.h>
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#include <net/if.h>
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#ifdef INET
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#include <netinet/in.h>
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#include <netinet/if_ether.h>
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#endif
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#include <dev/ic/am7990reg.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 <dev/tc/tcvar.h>
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#include <dev/tc/ioasicvar.h>
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extern caddr_t le_iomem;
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#ifdef __BROKEN_INDIRECT_CONFIG
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int le_ioasic_match __P((struct device *, void *, void *));
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#else
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int le_ioasic_match __P((struct device *, struct cfdata *, void *));
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#endif
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void le_ioasic_attach __P((struct device *, struct device *, void *));
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hide void le_ioasic_copytobuf_gap2 __P((struct am7990_softc *, void *,
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int, int));
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hide void le_ioasic_copyfrombuf_gap2 __P((struct am7990_softc *, void *,
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int, int));
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hide void le_ioasic_copytobuf_gap16 __P((struct am7990_softc *, void *,
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int, int));
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hide void le_ioasic_copyfrombuf_gap16 __P((struct am7990_softc *, void *,
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int, int));
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hide void le_ioasic_zerobuf_gap16 __P((struct am7990_softc *, int, int));
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struct cfattach le_ioasic_ca = {
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sizeof(struct le_softc), le_ioasic_match, le_ioasic_attach
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};
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int
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le_ioasic_match(parent, match, aux)
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struct device *parent;
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#ifdef __BROKEN_INDIRECT_CONFIG
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void *match;
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#else
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struct cfdata *match;
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#endif
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void *aux;
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{
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struct ioasicdev_attach_args *d = aux;
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if (!ioasic_submatch(match, aux))
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return (0);
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if (strncmp("lance", d->iada_modname, TC_ROM_LLEN))
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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_ioasic_attach(parent, self, aux)
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struct device *parent, *self;
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void *aux;
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{
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struct ioasicdev_attach_args *d = aux;
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register struct le_softc *lesc = (void *)self;
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register struct am7990_softc *sc = &lesc->sc_am7990;
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lesc->sc_r1 = (struct lereg1 *)
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TC_DENSE_TO_SPARSE(TC_PHYS_TO_UNCACHED(d->iada_addr));
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sc->sc_mem = (void *)TC_PHYS_TO_UNCACHED(le_iomem);
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sc->sc_copytodesc = le_ioasic_copytobuf_gap2;
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sc->sc_copyfromdesc = le_ioasic_copyfrombuf_gap2;
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sc->sc_copytobuf = le_ioasic_copytobuf_gap16;
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sc->sc_copyfrombuf = le_ioasic_copyfrombuf_gap16;
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sc->sc_zerobuf = le_ioasic_zerobuf_gap16;
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ioasic_lance_dma_setup(le_iomem); /* XXX more thought */
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dec_le_common_attach(sc, ioasic_lance_ether_address());
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ioasic_intr_establish(parent, d->iada_cookie, TC_IPL_NET,
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am7990_intr, sc);
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}
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/*
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* Special memory access functions needed by ioasic-attached LANCE
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* chips.
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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_ioasic_copytobuf_gap2(sc, fromv, boff, len)
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struct am7990_softc *sc;
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void *fromv;
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int boff;
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register int len;
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{
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volatile caddr_t buf = sc->sc_mem;
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register caddr_t from = fromv;
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register 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_ioasic_copyfrombuf_gap2(sc, tov, boff, len)
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struct am7990_softc *sc;
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void *tov;
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int boff, len;
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{
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volatile caddr_t buf = sc->sc_mem;
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register caddr_t to = tov;
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register volatile u_int16_t *bptr;
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register 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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/*
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* gap16: 16 bytes of data followed by 16 bytes of pad.
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*
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* Buffers must be 32-byte aligned.
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*/
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void
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le_ioasic_copytobuf_gap16(sc, fromv, boff, len)
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struct am7990_softc *sc;
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void *fromv;
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int boff;
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register int len;
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{
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volatile caddr_t buf = sc->sc_mem;
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register caddr_t from = fromv;
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register caddr_t bptr;
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register int xfer;
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bptr = buf + ((boff << 1) & ~0x1f);
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boff &= 0xf;
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xfer = min(len, 16 - boff);
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while (len > 0) {
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bcopy(from, bptr + boff, xfer);
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from += xfer;
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bptr += 32;
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boff = 0;
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len -= xfer;
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xfer = min(len, 16);
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}
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}
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void
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le_ioasic_copyfrombuf_gap16(sc, tov, boff, len)
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struct am7990_softc *sc;
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void *tov;
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int boff, len;
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{
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volatile caddr_t buf = sc->sc_mem;
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register caddr_t to = tov;
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register caddr_t bptr;
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register int xfer;
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bptr = buf + ((boff << 1) & ~0x1f);
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boff &= 0xf;
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xfer = min(len, 16 - boff);
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while (len > 0) {
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bcopy(bptr + boff, to, xfer);
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to += xfer;
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bptr += 32;
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boff = 0;
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len -= xfer;
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xfer = min(len, 16);
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}
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}
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void
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le_ioasic_zerobuf_gap16(sc, boff, len)
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struct am7990_softc *sc;
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int boff, len;
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{
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volatile caddr_t buf = sc->sc_mem;
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register caddr_t bptr;
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register int xfer;
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bptr = buf + ((boff << 1) & ~0x1f);
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boff &= 0xf;
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xfer = min(len, 16 - boff);
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while (len > 0) {
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bzero(bptr + boff, xfer);
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bptr += 32;
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boff = 0;
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len -= xfer;
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xfer = min(len, 16);
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}
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}
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