1 /* $NetBSD: mkclock_sbdio.c,v 1.7 2008/04/28 20:23:18 martin Exp $ */
2
3 /*-
4 * Copyright (c) 1996 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 #include <sys/cdefs.h>
33 __KERNEL_RCSID(0, "$NetBSD: mkclock_sbdio.c,v 1.7 2008/04/28 20:23:18 martin Exp $");
34
35 #include <sys/param.h>
36 #include <sys/kernel.h>
37 #include <sys/systm.h>
38 #include <sys/device.h>
39
40 #include <machine/cpu.h>
41 #include <machine/bus.h>
42 #include <machine/sbdiovar.h>
43
44 #include <dev/clock_subr.h>
45
46 #include <dev/ic/mk48txxreg.h>
47 #include <dev/ic/mk48txxvar.h>
48
49 #include "ioconf.h"
50
51 #define MKCLOCK_SBD_STRIDE 2
52
53 int mkclock_sbdio_match(device_t, cfdata_t, void *);
54 void mkclock_sbdio_attach(device_t, device_t, void *);
55 static uint8_t mkclock_sbdio_nvrd(struct mk48txx_softc *, int);
56 static void mkclock_sbdio_nvwr(struct mk48txx_softc *, int, uint8_t);
57
58 CFATTACH_DECL_NEW(mkclock_sbdio, sizeof(struct mk48txx_softc),
59 mkclock_sbdio_match, mkclock_sbdio_attach, NULL, NULL);
60
61 int
mkclock_sbdio_match(device_t parent,cfdata_t cf,void * aux)62 mkclock_sbdio_match(device_t parent, cfdata_t cf, void *aux)
63 {
64 struct sbdio_attach_args *sa = aux;
65
66 if (strcmp("mkclock", sa->sa_name) != 0)
67 return 0;
68
69 return 1;
70 }
71
72 void
mkclock_sbdio_attach(device_t parent,device_t self,void * aux)73 mkclock_sbdio_attach(device_t parent, device_t self, void *aux)
74 {
75 struct mk48txx_softc *sc = device_private(self);
76 struct sbdio_attach_args *sa = aux;
77 bus_size_t size;
78
79 sc->sc_dev = self;
80 switch (sa->sa_flags) {
81 case 0x0000:
82 sc->sc_model = "mk48t08";
83 size = MK48T08_CLKSZ;
84 break;
85
86 case 0x0001:
87 sc->sc_model = "mk48t18";
88 size = MK48T18_CLKSZ;
89 break;
90
91 default:
92 /* assume MK48T18 */
93 sc->sc_model = "mk48t18";
94 size = MK48T18_CLKSZ;
95 break;
96 }
97
98 sc->sc_bst = sa->sa_bust;
99 if (bus_space_map(sc->sc_bst, sa->sa_addr1, size, 0,
100 &sc->sc_bsh) != 0) {
101 aprint_error(": can't map device space\n");
102 return;
103 }
104
105 sc->sc_year0 = 2000; /* XXX Is this OK? */
106 sc->sc_nvrd = mkclock_sbdio_nvrd;
107 sc->sc_nvwr = mkclock_sbdio_nvwr;
108
109 mk48txx_attach(sc);
110
111 aprint_normal("\n");
112 }
113
114 static uint8_t
mkclock_sbdio_nvrd(struct mk48txx_softc * sc,int off)115 mkclock_sbdio_nvrd(struct mk48txx_softc *sc, int off)
116 {
117 uint8_t rv;
118
119 rv = bus_space_read_1(sc->sc_bst, sc->sc_bsh,
120 off << MKCLOCK_SBD_STRIDE);
121 return rv;
122 }
123
124 static void
mkclock_sbdio_nvwr(struct mk48txx_softc * sc,int off,uint8_t v)125 mkclock_sbdio_nvwr(struct mk48txx_softc *sc, int off, uint8_t v)
126 {
127
128 bus_space_write_1(sc->sc_bst, sc->sc_bsh, off << MKCLOCK_SBD_STRIDE, v);
129 }
130