114 lines
3.2 KiB
C
114 lines
3.2 KiB
C
/* $NetBSD: mcclock_mainbus.c,v 1.1 2001/06/01 16:00:04 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_mainbus.c,v 1.1 2001/06/01 16:00:04 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/autoconf.h>
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#include <machine/bus.h>
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#include <dev/ic/mc146818reg.h>
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#include <algor/algor/clockvar.h>
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#include <algor/dev/mcclockvar.h>
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struct mcclock_mainbus_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_mainbus_match(struct device *, struct cfdata *, void *);
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void mcclock_mainbus_attach(struct device *, struct device *, void *);
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struct cfattach mcclock_mainbus_ca = {
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sizeof (struct mcclock_mainbus_softc), mcclock_mainbus_match,
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mcclock_mainbus_attach,
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};
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void mcclock_mainbus_write(struct mcclock_softc *, u_int, u_int);
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u_int mcclock_mainbus_read(struct mcclock_softc *, u_int);
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const struct mcclock_busfns mcclock_mainbus_busfns = {
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mcclock_mainbus_write, mcclock_mainbus_read,
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};
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int
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mcclock_mainbus_match(struct device *parent, struct cfdata *match, void *aux)
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{
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struct mainbus_attach_args *ma = aux;
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if (strcmp(ma->ma_name, match->cf_driver->cd_name) == 0)
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return (1);
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return (0);
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}
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void
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mcclock_mainbus_attach(struct device *parent, struct device *self, void *aux)
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{
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struct mainbus_attach_args *ma = aux;
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struct mcclock_mainbus_softc *sc = (void *)self;
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sc->sc_iot = ma->ma_st;
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if (bus_space_map(sc->sc_iot, ma->ma_addr, 2, 0, &sc->sc_ioh))
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panic("mcclock_mainbus_attach: couldn't map clock I/O space");
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mcclock_attach(&sc->sc_mcclock, &mcclock_mainbus_busfns);
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}
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void
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mcclock_mainbus_write(struct mcclock_softc *mcsc, u_int reg, u_int datum)
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{
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struct mcclock_mainbus_softc *sc = (void *)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_mainbus_read(struct mcclock_softc *mcsc, u_int reg)
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{
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struct mcclock_mainbus_softc *sc = (void *)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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