1 /* $NetBSD: mkclock_ap.c,v 1.9 2008/04/28 20:23:30 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_ap.c,v 1.9 2008/04/28 20:23:30 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
43 #include <dev/clock_subr.h>
44 #include <dev/ic/mk48txxreg.h>
45 #include <dev/ic/mk48txxvar.h>
46
47 #include <newsmips/apbus/apbusvar.h>
48
49 #define MKCLOCK_AP_STRIDE 2
50 #define MKCLOCK_AP_OFFSET \
51 ((MK48T02_CLKOFF + MK48TXX_ICSR) << MKCLOCK_AP_STRIDE)
52
53 int mkclock_ap_match(device_t, cfdata_t, void *);
54 void mkclock_ap_attach(device_t, device_t, void *);
55 static uint8_t mkclock_ap_nvrd(struct mk48txx_softc *, int);
56 static void mkclock_ap_nvwr(struct mk48txx_softc *, int, uint8_t);
57
58 CFATTACH_DECL_NEW(mkclock_ap, sizeof(struct mk48txx_softc),
59 mkclock_ap_match, mkclock_ap_attach, NULL, NULL);
60
61 int
mkclock_ap_match(device_t parent,cfdata_t cf,void * aux)62 mkclock_ap_match(device_t parent, cfdata_t cf, void *aux)
63 {
64 struct apbus_attach_args *apa = aux;
65
66 if (strcmp("clock", apa->apa_name) != 0)
67 return 0;
68
69 return 1;
70 }
71
72 void
mkclock_ap_attach(device_t parent,device_t self,void * aux)73 mkclock_ap_attach(device_t parent, device_t self, void *aux)
74 {
75 struct mk48txx_softc *sc = device_private(self);
76 struct apbus_attach_args *apa = aux;
77
78 sc->sc_dev = self;
79 aprint_normal(" slot%d addr 0x%lx", apa->apa_slotno, apa->apa_hwbase);
80 if (bus_space_map(sc->sc_bst, apa->apa_hwbase - MKCLOCK_AP_OFFSET,
81 MK48T02_CLKSZ, 0, &sc->sc_bsh) != 0)
82 aprint_error(": can't map device space\n");
83
84 sc->sc_model = "mk48t02";
85 sc->sc_year0 = 1900;
86 sc->sc_nvrd = mkclock_ap_nvrd;
87 sc->sc_nvwr = mkclock_ap_nvwr;
88
89 mk48txx_attach(sc);
90
91 aprint_normal("\n");
92 }
93
94 static uint8_t
mkclock_ap_nvrd(struct mk48txx_softc * sc,int off)95 mkclock_ap_nvrd(struct mk48txx_softc *sc, int off)
96 {
97 uint8_t rv;
98
99 rv = bus_space_read_4(sc->sc_bst, sc->sc_bsh, off << MKCLOCK_AP_STRIDE);
100 return rv;
101 }
102
103 static void
mkclock_ap_nvwr(struct mk48txx_softc * sc,int off,uint8_t v)104 mkclock_ap_nvwr(struct mk48txx_softc *sc, int off, uint8_t v)
105 {
106
107 bus_space_write_4(sc->sc_bst, sc->sc_bsh, off << MKCLOCK_AP_STRIDE, v);
108 }
109