1 /* $OpenBSD: mcclock_ioasic.c,v 1.7 2022/03/13 08:04:13 mpi Exp $ */
2 /* $NetBSD: mcclock_ioasic.c,v 1.9 2000/07/04 02:37:51 nisimura Exp $ */
3
4 /*
5 * Copyright (c) 1994, 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 <dev/dec/clockvar.h>
37 #include <dev/dec/mcclockvar.h>
38 #include <dev/ic/mc146818reg.h>
39 #include <dev/tc/tcvar.h>
40 #include <dev/tc/ioasicvar.h> /* XXX */
41
42 struct mcclock_ioasic_clockdatum {
43 u_char datum;
44 char pad[3];
45 };
46
47 struct mcclock_ioasic_softc {
48 struct mcclock_softc sc_mcclock;
49
50 struct mcclock_ioasic_clockdatum *sc_dp;
51 };
52
53 int mcclock_ioasic_match(struct device *, void *, void *);
54 void mcclock_ioasic_attach(struct device *, struct device *, void *);
55
56 const struct cfattach mcclock_ioasic_ca = {
57 sizeof (struct mcclock_ioasic_softc), mcclock_ioasic_match,
58 mcclock_ioasic_attach,
59 };
60
61 void mcclock_ioasic_write(struct mcclock_softc *, u_int, u_int);
62 u_int mcclock_ioasic_read(struct mcclock_softc *, u_int);
63
64 const struct mcclock_busfns mcclock_ioasic_busfns = {
65 mcclock_ioasic_write, mcclock_ioasic_read,
66 };
67
68 int
mcclock_ioasic_match(parent,match,aux)69 mcclock_ioasic_match(parent, match, aux)
70 struct device *parent;
71 void *match, *aux;
72 {
73 struct ioasicdev_attach_args *d = aux;
74
75 if (strncmp("TOY_RTC ", d->iada_modname, TC_ROM_LLEN))
76 return (0);
77
78 return (1);
79 }
80
81 void
mcclock_ioasic_attach(parent,self,aux)82 mcclock_ioasic_attach(parent, self, aux)
83 struct device *parent, *self;
84 void *aux;
85 {
86 struct ioasicdev_attach_args *ioasicdev = aux;
87 struct mcclock_ioasic_softc *sc = (struct mcclock_ioasic_softc *)self;
88
89 sc->sc_dp = (struct mcclock_ioasic_clockdatum *)ioasicdev->iada_addr;
90
91 mcclock_attach(&sc->sc_mcclock, &mcclock_ioasic_busfns);
92 }
93
94 void
mcclock_ioasic_write(dev,reg,datum)95 mcclock_ioasic_write(dev, reg, datum)
96 struct mcclock_softc *dev;
97 u_int reg, datum;
98 {
99 struct mcclock_ioasic_softc *sc = (struct mcclock_ioasic_softc *)dev;
100
101 sc->sc_dp[reg].datum = datum;
102 }
103
104 u_int
mcclock_ioasic_read(dev,reg)105 mcclock_ioasic_read(dev, reg)
106 struct mcclock_softc *dev;
107 u_int reg;
108 {
109 struct mcclock_ioasic_softc *sc = (struct mcclock_ioasic_softc *)dev;
110
111 return (sc->sc_dp[reg].datum);
112 }
113