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
43 struct 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
50 int mcclock_isa_match(struct device *, void *, void *);
51 void mcclock_isa_attach(struct device *, struct device *, void *);
52
53 const struct cfattach mcclock_isa_ca = {
54 sizeof (struct mcclock_isa_softc), mcclock_isa_match,
55 mcclock_isa_attach,
56 };
57
58 void mcclock_isa_write(struct mcclock_softc *, u_int, u_int);
59 u_int mcclock_isa_read(struct mcclock_softc *, u_int);
60
61 const struct mcclock_busfns mcclock_isa_busfns = {
62 mcclock_isa_write, mcclock_isa_read,
63 };
64
65 int
mcclock_isa_match(parent,match,aux)66 mcclock_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
91 void
mcclock_isa_attach(parent,self,aux)92 mcclock_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
107 void
mcclock_isa_write(mcsc,reg,datum)108 mcclock_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
120 u_int
mcclock_isa_read(mcsc,reg)121 mcclock_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