1/*	$OpenBSD: mcclock_isa.c,v 1.9 2022/03/13 08:04:13 mpi Exp $	*/
2/*	$NetBSD: mcclock_isa.c,v 1.5 1996/12/05 01:39:29 cgd Exp $	*/
3
4/*
5 * Copyright (c) 1995, 1996 Carnegie-Mellon University.
6 * All rights reserved.
7 *
8 * Author: Chris G. Demetriou
9 *
10 * Permission to use, copy, modify and distribute this software and
11 * its documentation is hereby granted, provided that both the copyright
12 * notice and this permission notice appear in all copies of the
13 * software, derivative works or modified versions, and any portions
14 * thereof, and that both notices appear in supporting documentation.
15 *
16 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
17 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
18 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
19 *
20 * Carnegie Mellon requests users of this software to return to
21 *
22 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
23 *  School of Computer Science
24 *  Carnegie Mellon University
25 *  Pittsburgh PA 15213-3890
26 *
27 * any improvements or extensions that they make and grant Carnegie the
28 * rights to redistribute these changes.
29 */
30
31#include <sys/param.h>
32#include <sys/kernel.h>
33#include <sys/systm.h>
34#include <sys/device.h>
35
36#include <machine/bus.h>
37
38#include <alpha/alpha/clockvar.h>
39#include <alpha/alpha/mcclockvar.h>
40#include <dev/ic/mc146818reg.h>
41#include <dev/isa/isavar.h>
42
43struct mcclock_isa_softc {
44	struct mcclock_softc	sc_mcclock;
45
46	bus_space_tag_t		sc_iot;
47	bus_space_handle_t	sc_ioh;
48};
49
50int	mcclock_isa_match(struct device *, void *, void *);
51void	mcclock_isa_attach(struct device *, struct device *, void *);
52
53const struct cfattach mcclock_isa_ca = {
54	sizeof (struct mcclock_isa_softc), mcclock_isa_match,
55	    mcclock_isa_attach,
56};
57
58void	mcclock_isa_write(struct mcclock_softc *, u_int, u_int);
59u_int	mcclock_isa_read(struct mcclock_softc *, u_int);
60
61const struct mcclock_busfns mcclock_isa_busfns = {
62	mcclock_isa_write, mcclock_isa_read,
63};
64
65int
66mcclock_isa_match(parent, match, aux)
67	struct device *parent;
68	void *match;
69	void *aux;
70{
71	struct isa_attach_args *ia = aux;
72	bus_space_handle_t ioh;
73
74        if ((ia->ia_iobase != IOBASEUNK && ia->ia_iobase != 0x70) ||
75            /* (ia->ia_iosize != 0 && ia->ia_iosize != 0x2) || XXX isa.c */
76            ia->ia_maddr != MADDRUNK || ia->ia_msize != 0 ||
77            ia->ia_irq != IRQUNK || ia->ia_drq != DRQUNK)
78                return (0);
79
80	if (bus_space_map(ia->ia_iot, 0x70, 0x2, 0, &ioh))
81		return (0);
82
83	bus_space_unmap(ia->ia_iot, ioh, 0x2);
84
85	ia->ia_iobase = 0x70;
86	ia->ia_iosize = 0x2;
87
88	return (1);
89}
90
91void
92mcclock_isa_attach(parent, self, aux)
93	struct device *parent, *self;
94	void *aux;
95{
96	struct isa_attach_args *ia = aux;
97	struct mcclock_isa_softc *sc = (struct mcclock_isa_softc *)self;
98
99	sc->sc_iot = ia->ia_iot;
100	if (bus_space_map(sc->sc_iot, ia->ia_iobase, ia->ia_iosize, 0,
101	    &sc->sc_ioh))
102		panic("mcclock_isa_attach: couldn't map clock I/O space");
103
104	mcclock_attach(&sc->sc_mcclock, &mcclock_isa_busfns);
105}
106
107void
108mcclock_isa_write(mcsc, reg, datum)
109	struct mcclock_softc *mcsc;
110	u_int reg, datum;
111{
112	struct mcclock_isa_softc *sc = (struct mcclock_isa_softc *)mcsc;
113	bus_space_tag_t iot = sc->sc_iot;
114	bus_space_handle_t ioh = sc->sc_ioh;
115
116	bus_space_write_1(iot, ioh, 0, reg);
117	bus_space_write_1(iot, ioh, 1, datum);
118}
119
120u_int
121mcclock_isa_read(mcsc, reg)
122	struct mcclock_softc *mcsc;
123	u_int reg;
124{
125	struct mcclock_isa_softc *sc = (struct mcclock_isa_softc *)mcsc;
126	bus_space_tag_t iot = sc->sc_iot;
127	bus_space_handle_t ioh = sc->sc_ioh;
128
129	bus_space_write_1(iot, ioh, 0, reg);
130	return bus_space_read_1(iot, ioh, 1);
131}
132