mcclock_isa.c revision 1.13 
1/* $NetBSD: mcclock_isa.c,v 1.13 2002/10/02 04:06:38 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 1.13 2002/10/02 04:06:38 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
56CFATTACH_DECL(mcclock_isa, sizeof (struct mcclock_isa_softc),
57    mcclock_isa_match, mcclock_isa_attach, NULL, NULL);
58
59void	mcclock_isa_write __P((struct mcclock_softc *, u_int, u_int));
60u_int	mcclock_isa_read __P((struct mcclock_softc *, u_int));
61
62const struct mcclock_busfns mcclock_isa_busfns = {
63	mcclock_isa_write, mcclock_isa_read,
64};
65
66int
67mcclock_isa_match(parent, match, aux)
68	struct device *parent;
69	struct cfdata *match;
70	void *aux;
71{
72	struct isa_attach_args *ia = aux;
73	bus_space_handle_t ioh;
74
75	if (ia->ia_nio < 1 ||
76	    (ia->ia_io[0].ir_addr != ISACF_PORT_DEFAULT &&
77	     ia->ia_io[0].ir_addr != 0x70))
78		return (0);
79
80	if (ia->ia_niomem > 0 &&
81	    (ia->ia_iomem[0].ir_addr != ISACF_IOMEM_DEFAULT))
82		return (0);
83
84	if (ia->ia_nirq > 0 &&
85	    (ia->ia_irq[0].ir_irq != ISACF_IRQ_DEFAULT))
86		return (0);
87
88	if (ia->ia_ndrq > 0 &&
89	    (ia->ia_drq[0].ir_drq != ISACF_DRQ_DEFAULT))
90		return (0);
91
92	if (bus_space_map(ia->ia_iot, 0x70, 0x2, 0, &ioh))
93		return (0);
94
95	bus_space_unmap(ia->ia_iot, ioh, 0x2);
96
97	ia->ia_nio = 1;
98	ia->ia_io[0].ir_addr = 0x70;
99	ia->ia_io[0].ir_size = 0x02;
100
101	ia->ia_niomem = 0;
102	ia->ia_nirq = 0;
103	ia->ia_ndrq = 0;
104
105	return (1);
106}
107
108void
109mcclock_isa_attach(parent, self, aux)
110	struct device *parent, *self;
111	void *aux;
112{
113	struct isa_attach_args *ia = aux;
114	struct mcclock_isa_softc *sc = (struct mcclock_isa_softc *)self;
115
116	sc->sc_iot = ia->ia_iot;
117	if (bus_space_map(sc->sc_iot, ia->ia_io[0].ir_addr,
118	    ia->ia_io[0].ir_size, 0, &sc->sc_ioh))
119		panic("mcclock_isa_attach: couldn't map clock I/O space");
120
121	mcclock_attach(&sc->sc_mcclock, &mcclock_isa_busfns);
122}
123
124void
125mcclock_isa_write(mcsc, reg, datum)
126	struct mcclock_softc *mcsc;
127	u_int reg, datum;
128{
129	struct mcclock_isa_softc *sc = (struct mcclock_isa_softc *)mcsc;
130	bus_space_tag_t iot = sc->sc_iot;
131	bus_space_handle_t ioh = sc->sc_ioh;
132
133	bus_space_write_1(iot, ioh, 0, reg);
134	bus_space_write_1(iot, ioh, 1, datum);
135}
136
137u_int
138mcclock_isa_read(mcsc, reg)
139	struct mcclock_softc *mcsc;
140	u_int reg;
141{
142	struct mcclock_isa_softc *sc = (struct mcclock_isa_softc *)mcsc;
143	bus_space_tag_t iot = sc->sc_iot;
144	bus_space_handle_t ioh = sc->sc_ioh;
145
146	bus_space_write_1(iot, ioh, 0, reg);
147	return bus_space_read_1(iot, ioh, 1);
148}
149