mcclock_isa.c revision 1.12 
1/* $NetBSD: mcclock_isa.c,v 1.12 2002/09/27 20:29:27 thorpej Exp $ */
2
3/*
4 * Copyright (c) 1995, 1996 Carnegie-Mellon University.
5 * All rights reserved.
6 *
7 * Author: Chris G. Demetriou
8 *
9 * Permission to use, copy, modify and distribute this software and
10 * its documentation is hereby granted, provided that both the copyright
11 * notice and this permission notice appear in all copies of the
12 * software, derivative works or modified versions, and any portions
13 * thereof, and that both notices appear in supporting documentation.
14 *
15 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
16 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
17 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
18 *
19 * Carnegie Mellon requests users of this software to return to
20 *
21 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
22 *  School of Computer Science
23 *  Carnegie Mellon University
24 *  Pittsburgh PA 15213-3890
25 *
26 * any improvements or extensions that they make and grant Carnegie the
27 * rights to redistribute these changes.
28 */
29
30#include <sys/cdefs.h>			/* RCS ID & Copyright macro defns */
31
32__KERNEL_RCSID(0, "$NetBSD: mcclock_isa.c,v 1.12 2002/09/27 20:29:27 thorpej Exp $");
33
34#include <sys/param.h>
35#include <sys/kernel.h>
36#include <sys/systm.h>
37#include <sys/device.h>
38
39#include <machine/bus.h>
40
41#include <dev/dec/clockvar.h>
42#include <dev/dec/mcclockvar.h>
43#include <dev/ic/mc146818reg.h>
44#include <dev/isa/isavar.h>
45
46struct mcclock_isa_softc {
47	struct mcclock_softc	sc_mcclock;
48
49	bus_space_tag_t		sc_iot;
50	bus_space_handle_t	sc_ioh;
51};
52
53int	mcclock_isa_match __P((struct device *, struct cfdata *, void *));
54void	mcclock_isa_attach __P((struct device *, struct device *, void *));
55
56const struct cfattach mcclock_isa_ca = {
57	sizeof (struct mcclock_isa_softc), mcclock_isa_match,
58	    mcclock_isa_attach,
59};
60
61void	mcclock_isa_write __P((struct mcclock_softc *, u_int, u_int));
62u_int	mcclock_isa_read __P((struct mcclock_softc *, u_int));
63
64const struct mcclock_busfns mcclock_isa_busfns = {
65	mcclock_isa_write, mcclock_isa_read,
66};
67
68int
69mcclock_isa_match(parent, match, aux)
70	struct device *parent;
71	struct cfdata *match;
72	void *aux;
73{
74	struct isa_attach_args *ia = aux;
75	bus_space_handle_t ioh;
76
77	if (ia->ia_nio < 1 ||
78	    (ia->ia_io[0].ir_addr != ISACF_PORT_DEFAULT &&
79	     ia->ia_io[0].ir_addr != 0x70))
80		return (0);
81
82	if (ia->ia_niomem > 0 &&
83	    (ia->ia_iomem[0].ir_addr != ISACF_IOMEM_DEFAULT))
84		return (0);
85
86	if (ia->ia_nirq > 0 &&
87	    (ia->ia_irq[0].ir_irq != ISACF_IRQ_DEFAULT))
88		return (0);
89
90	if (ia->ia_ndrq > 0 &&
91	    (ia->ia_drq[0].ir_drq != ISACF_DRQ_DEFAULT))
92		return (0);
93
94	if (bus_space_map(ia->ia_iot, 0x70, 0x2, 0, &ioh))
95		return (0);
96
97	bus_space_unmap(ia->ia_iot, ioh, 0x2);
98
99	ia->ia_nio = 1;
100	ia->ia_io[0].ir_addr = 0x70;
101	ia->ia_io[0].ir_size = 0x02;
102
103	ia->ia_niomem = 0;
104	ia->ia_nirq = 0;
105	ia->ia_ndrq = 0;
106
107	return (1);
108}
109
110void
111mcclock_isa_attach(parent, self, aux)
112	struct device *parent, *self;
113	void *aux;
114{
115	struct isa_attach_args *ia = aux;
116	struct mcclock_isa_softc *sc = (struct mcclock_isa_softc *)self;
117
118	sc->sc_iot = ia->ia_iot;
119	if (bus_space_map(sc->sc_iot, ia->ia_io[0].ir_addr,
120	    ia->ia_io[0].ir_size, 0, &sc->sc_ioh))
121		panic("mcclock_isa_attach: couldn't map clock I/O space");
122
123	mcclock_attach(&sc->sc_mcclock, &mcclock_isa_busfns);
124}
125
126void
127mcclock_isa_write(mcsc, reg, datum)
128	struct mcclock_softc *mcsc;
129	u_int reg, datum;
130{
131	struct mcclock_isa_softc *sc = (struct mcclock_isa_softc *)mcsc;
132	bus_space_tag_t iot = sc->sc_iot;
133	bus_space_handle_t ioh = sc->sc_ioh;
134
135	bus_space_write_1(iot, ioh, 0, reg);
136	bus_space_write_1(iot, ioh, 1, datum);
137}
138
139u_int
140mcclock_isa_read(mcsc, reg)
141	struct mcclock_softc *mcsc;
142	u_int reg;
143{
144	struct mcclock_isa_softc *sc = (struct mcclock_isa_softc *)mcsc;
145	bus_space_tag_t iot = sc->sc_iot;
146	bus_space_handle_t ioh = sc->sc_ioh;
147
148	bus_space_write_1(iot, ioh, 0, reg);
149	return bus_space_read_1(iot, ioh, 1);
150}
151