1 /* $NetBSD: mcclock_jensenio.c,v 1.12 2024/03/06 06:30:49 thorpej Exp $ */
2
3 /*-
4 * Copyright (c) 1999 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jason R. Thorpe.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 /*
33 * Copyright (c) 1995, 1996 Carnegie-Mellon University.
34 * All rights reserved.
35 *
36 * Author: Chris G. Demetriou
37 *
38 * Permission to use, copy, modify and distribute this software and
39 * its documentation is hereby granted, provided that both the copyright
40 * notice and this permission notice appear in all copies of the
41 * software, derivative works or modified versions, and any portions
42 * thereof, and that both notices appear in supporting documentation.
43 *
44 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
45 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
46 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
47 *
48 * Carnegie Mellon requests users of this software to return to
49 *
50 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
51 * School of Computer Science
52 * Carnegie Mellon University
53 * Pittsburgh PA 15213-3890
54 *
55 * any improvements or extensions that they make and grant Carnegie the
56 * rights to redistribute these changes.
57 */
58
59 #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
60
61 __KERNEL_RCSID(0, "$NetBSD: mcclock_jensenio.c,v 1.12 2024/03/06 06:30:49 thorpej Exp $");
62
63 #include <sys/param.h>
64 #include <sys/kernel.h>
65 #include <sys/systm.h>
66 #include <sys/device.h>
67
68 #include <sys/bus.h>
69
70 #include <dev/clock_subr.h>
71
72 #include <dev/ic/mc146818reg.h>
73 #include <dev/ic/mc146818var.h>
74 #include <dev/eisa/eisavar.h>
75 #include <dev/isa/isavar.h>
76 #include <alpha/jensenio/jenseniovar.h>
77 #include <alpha/alpha/mcclockvar.h>
78
79 struct mcclock_jensenio_softc {
80 struct mcclock_softc sc_mcclock;
81
82 bus_space_handle_t sc_std_rtc_ioh;
83 };
84
85 static int mcclock_jensenio_match(device_t, cfdata_t, void *);
86 static void mcclock_jensenio_attach(device_t, device_t, void *);
87
88 CFATTACH_DECL_NEW(mcclock_jensenio, sizeof(struct mcclock_jensenio_softc),
89 mcclock_jensenio_match, mcclock_jensenio_attach, NULL, NULL);
90
91 static void mcclock_jensenio_write(struct mc146818_softc *, u_int, u_int);
92 static u_int mcclock_jensenio_read(struct mc146818_softc *, u_int);
93
94
95 static int
mcclock_jensenio_match(device_t parent,cfdata_t cf,void * aux)96 mcclock_jensenio_match(device_t parent, cfdata_t cf, void *aux)
97 {
98 struct jensenio_attach_args *ja = aux;
99
100 /* Always present. */
101 if (strcmp(ja->ja_name, cf->cf_name) == 0)
102 return (1);
103
104 return (0);
105 }
106
107 static void
mcclock_jensenio_attach(device_t parent,device_t self,void * aux)108 mcclock_jensenio_attach(device_t parent, device_t self, void *aux)
109 {
110 struct mcclock_jensenio_softc *jsc = device_private(self);
111 struct jensenio_attach_args *ja = aux;
112 struct mc146818_softc *sc = &jsc->sc_mcclock.sc_mc146818;
113
114 sc->sc_dev = self;
115 sc->sc_bst = ja->ja_iot;
116 if (bus_space_map(sc->sc_bst, ja->ja_ioaddr, 0x02, 0,
117 &sc->sc_bsh))
118 panic("mcclock_jensenio_attach: couldn't map clock I/O space");
119
120 /*
121 * Map the I/O space normally used by the ISA RTC (port 0x70) so
122 * as to avoid a false match at that address, as well.
123 */
124 (void)bus_space_map(sc->sc_bst, 0x70, 0x02, 0,
125 &jsc->sc_std_rtc_ioh);
126
127 sc->sc_mcread = mcclock_jensenio_read;
128 sc->sc_mcwrite = mcclock_jensenio_write;
129
130 mcclock_attach(&jsc->sc_mcclock);
131 }
132
133 static void
mcclock_jensenio_write(struct mc146818_softc * sc,u_int reg,u_int datum)134 mcclock_jensenio_write(struct mc146818_softc *sc, u_int reg, u_int datum)
135 {
136 bus_space_tag_t iot = sc->sc_bst;
137 bus_space_handle_t ioh = sc->sc_bsh;
138
139 bus_space_write_1(iot, ioh, 0, reg);
140 bus_space_write_1(iot, ioh, 1, datum);
141 }
142
143 static u_int
mcclock_jensenio_read(struct mc146818_softc * sc,u_int reg)144 mcclock_jensenio_read(struct mc146818_softc *sc, u_int reg)
145 {
146 bus_space_tag_t iot = sc->sc_bst;
147 bus_space_handle_t ioh = sc->sc_bsh;
148
149 bus_space_write_1(iot, ioh, 0, reg);
150 return bus_space_read_1(iot, ioh, 1);
151 }
152