135 lines
3.7 KiB
C
135 lines
3.7 KiB
C
/* $NetBSD: mcclock_isa.c,v 1.10 1997/09/02 13:18:58 thorpej Exp $ */
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/*
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* Copyright (c) 1995, 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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#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
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__KERNEL_RCSID(0, "$NetBSD: mcclock_isa.c,v 1.10 1997/09/02 13:18:58 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 <dev/dec/clockvar.h>
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#include <dev/dec/mcclockvar.h>
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#include <dev/ic/mc146818reg.h>
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#include <dev/isa/isavar.h>
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struct mcclock_isa_softc {
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struct mcclock_softc sc_mcclock;
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bus_space_tag_t sc_iot;
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bus_space_handle_t sc_ioh;
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};
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int mcclock_isa_match __P((struct device *, struct cfdata *, void *));
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void mcclock_isa_attach __P((struct device *, struct device *, void *));
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struct cfattach mcclock_isa_ca = {
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sizeof (struct mcclock_isa_softc), mcclock_isa_match,
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mcclock_isa_attach,
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};
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void mcclock_isa_write __P((struct mcclock_softc *, u_int, u_int));
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u_int mcclock_isa_read __P((struct mcclock_softc *, u_int));
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const struct mcclock_busfns mcclock_isa_busfns = {
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mcclock_isa_write, mcclock_isa_read,
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};
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int
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mcclock_isa_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 isa_attach_args *ia = aux;
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bus_space_handle_t ioh;
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if ((ia->ia_iobase != IOBASEUNK && ia->ia_iobase != 0x70) ||
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/* (ia->ia_iosize != 0 && ia->ia_iosize != 0x2) || XXX isa.c */
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ia->ia_maddr != MADDRUNK || ia->ia_msize != 0 ||
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ia->ia_irq != IRQUNK || ia->ia_drq != DRQUNK)
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return (0);
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if (bus_space_map(ia->ia_iot, 0x70, 0x2, 0, &ioh))
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return (0);
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bus_space_unmap(ia->ia_iot, ioh, 0x2);
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ia->ia_iobase = 0x70;
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ia->ia_iosize = 0x2;
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return (1);
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}
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void
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mcclock_isa_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 isa_attach_args *ia = aux;
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struct mcclock_isa_softc *sc = (struct mcclock_isa_softc *)self;
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sc->sc_iot = ia->ia_iot;
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if (bus_space_map(sc->sc_iot, ia->ia_iobase, ia->ia_iosize, 0,
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&sc->sc_ioh))
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panic("mcclock_isa_attach: couldn't map clock I/O space");
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mcclock_attach(&sc->sc_mcclock, &mcclock_isa_busfns);
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}
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void
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mcclock_isa_write(mcsc, reg, datum)
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struct mcclock_softc *mcsc;
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u_int reg, datum;
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{
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struct mcclock_isa_softc *sc = (struct mcclock_isa_softc *)mcsc;
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bus_space_tag_t iot = sc->sc_iot;
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bus_space_handle_t ioh = sc->sc_ioh;
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bus_space_write_1(iot, ioh, 0, reg);
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bus_space_write_1(iot, ioh, 1, datum);
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}
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u_int
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mcclock_isa_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_isa_softc *sc = (struct mcclock_isa_softc *)mcsc;
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bus_space_tag_t iot = sc->sc_iot;
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bus_space_handle_t ioh = sc->sc_ioh;
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bus_space_write_1(iot, ioh, 0, reg);
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return bus_space_read_1(iot, ioh, 1);
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}
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