Annotation of sys/arch/alpha/isa/mcclock_isa.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: mcclock_isa.c,v 1.8 2006/01/02 05:21:24 brad 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: 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
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
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
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
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: }
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