122 lines
3.8 KiB
C
122 lines
3.8 KiB
C
/* $NetBSD: mcclock_tlsb.c,v 1.6 1997/09/02 13:20:48 thorpej Exp $ */
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/*
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* Copyright (c) 1997 by Matthew Jacob
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* NASA AMES Research Center.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice immediately at the beginning of the file, without modification,
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* this list of conditions, and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
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__KERNEL_RCSID(0, "$NetBSD: mcclock_tlsb.c,v 1.6 1997/09/02 13:20:48 thorpej Exp $");
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/systm.h>
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#include <sys/device.h>
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#include <machine/bus.h>
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#include <machine/autoconf.h>
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#include <dev/dec/clockvar.h>
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#include <dev/dec/mcclockvar.h>
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#include <alpha/tlsb/tlsbreg.h>
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#include <dev/ic/mc146818reg.h>
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#define KV(_addr) ((caddr_t)ALPHA_PHYS_TO_K0SEG((_addr)))
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/*
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* Registers are 64 bytes apart (and 1 byte wide)
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*/
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#define REGSHIFT 6
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struct mcclock_tlsb_softc {
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struct mcclock_softc sc_mcclock;
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unsigned long regbase;
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};
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int mcclock_tlsb_match __P((struct device *, struct cfdata *, void *));
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void mcclock_tlsb_attach __P((struct device *, struct device *, void *));
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struct cfattach mcclock_tlsb_ca = {
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sizeof (struct mcclock_tlsb_softc),
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mcclock_tlsb_match,
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mcclock_tlsb_attach,
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};
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static void mcclock_tlsb_write __P((struct mcclock_softc *, u_int, u_int));
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static u_int mcclock_tlsb_read __P((struct mcclock_softc *, u_int));
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const struct mcclock_busfns mcclock_tlsb_busfns = {
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mcclock_tlsb_write, mcclock_tlsb_read,
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};
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extern struct cfdriver mcclock_cd;
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int
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mcclock_tlsb_match(parent, match, aux)
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struct device *parent;
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struct cfdata *match;
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void *aux;
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{
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struct confargs *ca = aux;
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if (strcmp(ca->ca_name, mcclock_cd.cd_name))
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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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mcclock_tlsb_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 mcclock_tlsb_softc *sc = (struct mcclock_tlsb_softc *)self;
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struct confargs *ca = aux;
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sc->regbase = TLSB_GBUS_BASE + ca->ca_offset;
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mcclock_attach(&sc->sc_mcclock, &mcclock_tlsb_busfns);
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}
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static void
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mcclock_tlsb_write(mcsc, reg, val)
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struct mcclock_softc *mcsc;
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u_int reg, val;
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{
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struct mcclock_tlsb_softc *sc = (struct mcclock_tlsb_softc *)mcsc;
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unsigned char *ptr = (unsigned char *)
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KV(sc->regbase + (reg << REGSHIFT));
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*ptr = val;
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}
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static u_int
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mcclock_tlsb_read(mcsc, reg)
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struct mcclock_softc *mcsc;
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u_int reg;
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{
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struct mcclock_tlsb_softc *sc = (struct mcclock_tlsb_softc *)mcsc;
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unsigned char *ptr = (unsigned char *)
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KV(sc->regbase + (reg << REGSHIFT));
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return *ptr;
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}
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