1 /* $OpenBSD: mcclock_isa.c,v 1.4 2022/10/15 14:58:54 jsg 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 <dev/clock_subr.h>
39 #include <dev/ic/mc146818reg.h>
40 #include <dev/isa/isavar.h>
41
42 #include <loongson/dev/mcclockvar.h>
43
44 struct mcclock_isa_softc {
45 struct mcclock_softc sc_mcclock;
46
47 bus_space_tag_t sc_iot;
48 bus_space_handle_t sc_ioh;
49 };
50
51 int mcclock_isa_match(struct device *, void *, void *);
52 void mcclock_isa_attach(struct device *, struct device *, void *);
53
54 const struct cfattach mcclock_isa_ca = {
55 sizeof (struct mcclock_isa_softc), mcclock_isa_match,
56 mcclock_isa_attach,
57 };
58
59 void mcclock_isa_write(struct mcclock_softc *, u_int, u_int);
60 u_int mcclock_isa_read(struct mcclock_softc *, u_int);
61
62 const struct mcclock_busfns mcclock_isa_busfns = {
63 mcclock_isa_write, mcclock_isa_read,
64 };
65
66 int
mcclock_isa_match(struct device * parent,void * match,void * aux)67 mcclock_isa_match(struct device *parent, void *match, void *aux)
68 {
69 struct isa_attach_args *ia = aux;
70 bus_space_handle_t ioh;
71
72 if ((ia->ia_iobase != IOBASEUNK && ia->ia_iobase != 0x70) ||
73 /* (ia->ia_iosize != 0 && ia->ia_iosize != 0x2) || XXX isa.c */
74 ia->ia_maddr != MADDRUNK || ia->ia_msize != 0 ||
75 ia->ia_irq != IRQUNK || ia->ia_drq != DRQUNK)
76 return (0);
77
78 if (bus_space_map(ia->ia_iot, 0x70, 0x2, 0, &ioh))
79 return (0);
80
81 bus_space_unmap(ia->ia_iot, ioh, 0x2);
82
83 ia->ia_iobase = 0x70;
84 ia->ia_iosize = 0x2;
85
86 return (1);
87 }
88
89 void
mcclock_isa_attach(struct device * parent,struct device * self,void * aux)90 mcclock_isa_attach(struct device *parent, struct device *self, void *aux)
91 {
92 struct isa_attach_args *ia = aux;
93 struct mcclock_isa_softc *sc = (struct mcclock_isa_softc *)self;
94
95 sc->sc_iot = ia->ia_iot;
96 if (bus_space_map(sc->sc_iot, ia->ia_iobase, ia->ia_iosize, 0,
97 &sc->sc_ioh))
98 panic("mcclock_isa_attach: couldn't map clock I/O space");
99
100 mcclock_attach(&sc->sc_mcclock, &mcclock_isa_busfns);
101 }
102
103 void
mcclock_isa_write(struct mcclock_softc * mcsc,u_int reg,u_int datum)104 mcclock_isa_write(struct mcclock_softc *mcsc, u_int reg, u_int datum)
105 {
106 struct mcclock_isa_softc *sc = (struct mcclock_isa_softc *)mcsc;
107 bus_space_tag_t iot = sc->sc_iot;
108 bus_space_handle_t ioh = sc->sc_ioh;
109
110 bus_space_write_1(iot, ioh, 0, reg);
111 bus_space_write_1(iot, ioh, 1, datum);
112 }
113
114 u_int
mcclock_isa_read(struct mcclock_softc * mcsc,u_int reg)115 mcclock_isa_read(struct mcclock_softc *mcsc, u_int reg)
116 {
117 struct mcclock_isa_softc *sc = (struct mcclock_isa_softc *)mcsc;
118 bus_space_tag_t iot = sc->sc_iot;
119 bus_space_handle_t ioh = sc->sc_ioh;
120
121 bus_space_write_1(iot, ioh, 0, reg);
122 return bus_space_read_1(iot, ioh, 1);
123 }
124