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/* $OpenBSD: mcclock_isa.c,v 1.9 2022/03/13 08:04:13 mpi Exp $ */
/* $NetBSD: mcclock_isa.c,v 1.5 1996/12/05 01:39:29 cgd Exp $ */
/*
* Copyright (c) 1995, 1996 Carnegie-Mellon University.
* All rights reserved.
*
* Author: Chris G. Demetriou
*
* Permission to use, copy, modify and distribute this software and
* its documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*/
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <machine/bus.h>
#include <alpha/alpha/clockvar.h>
#include <alpha/alpha/mcclockvar.h>
#include <dev/ic/mc146818reg.h>
#include <dev/isa/isavar.h>
struct mcclock_isa_softc {
struct mcclock_softc sc_mcclock;
bus_space_tag_t sc_iot;
bus_space_handle_t sc_ioh;
};
int mcclock_isa_match(struct device *, void *, void *);
void mcclock_isa_attach(struct device *, struct device *, void *);
const struct cfattach mcclock_isa_ca = {
sizeof (struct mcclock_isa_softc), mcclock_isa_match,
mcclock_isa_attach,
};
void mcclock_isa_write(struct mcclock_softc *, u_int, u_int);
u_int mcclock_isa_read(struct mcclock_softc *, u_int);
const struct mcclock_busfns mcclock_isa_busfns = {
mcclock_isa_write, mcclock_isa_read,
};
int
mcclock_isa_match(parent, match, aux)
struct device *parent;
void *match;
void *aux;
{
struct isa_attach_args *ia = aux;
bus_space_handle_t ioh;
if ((ia->ia_iobase != IOBASEUNK && ia->ia_iobase != 0x70) ||
/* (ia->ia_iosize != 0 && ia->ia_iosize != 0x2) || XXX isa.c */
ia->ia_maddr != MADDRUNK || ia->ia_msize != 0 ||
ia->ia_irq != IRQUNK || ia->ia_drq != DRQUNK)
return (0);
if (bus_space_map(ia->ia_iot, 0x70, 0x2, 0, &ioh))
return (0);
bus_space_unmap(ia->ia_iot, ioh, 0x2);
ia->ia_iobase = 0x70;
ia->ia_iosize = 0x2;
return (1);
}
void
mcclock_isa_attach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct isa_attach_args *ia = aux;
struct mcclock_isa_softc *sc = (struct mcclock_isa_softc *)self;
sc->sc_iot = ia->ia_iot;
if (bus_space_map(sc->sc_iot, ia->ia_iobase, ia->ia_iosize, 0,
&sc->sc_ioh))
panic("mcclock_isa_attach: couldn't map clock I/O space");
mcclock_attach(&sc->sc_mcclock, &mcclock_isa_busfns);
}
void
mcclock_isa_write(mcsc, reg, datum)
struct mcclock_softc *mcsc;
u_int reg, datum;
{
struct mcclock_isa_softc *sc = (struct mcclock_isa_softc *)mcsc;
bus_space_tag_t iot = sc->sc_iot;
bus_space_handle_t ioh = sc->sc_ioh;
bus_space_write_1(iot, ioh, 0, reg);
bus_space_write_1(iot, ioh, 1, datum);
}
u_int
mcclock_isa_read(mcsc, reg)
struct mcclock_softc *mcsc;
u_int reg;
{
struct mcclock_isa_softc *sc = (struct mcclock_isa_softc *)mcsc;
bus_space_tag_t iot = sc->sc_iot;
bus_space_handle_t ioh = sc->sc_ioh;
bus_space_write_1(iot, ioh, 0, reg);
return bus_space_read_1(iot, ioh, 1);
}
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