1 /* $NetBSD: wmrtc.c,v 1.1 2013/04/28 12:11:26 kiyohara Exp $ */
2 /*
3 * Copyright (c) 2012 KIYOHARA Takashi
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
19 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
20 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
23 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
24 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
25 * POSSIBILITY OF SUCH DAMAGE.
26 */
27 #include <sys/cdefs.h>
28 __KERNEL_RCSID(0, "$NetBSD: wmrtc.c,v 1.1 2013/04/28 12:11:26 kiyohara Exp $");
29
30 #include <sys/param.h>
31 #include <sys/bus.h>
32 #include <sys/device.h>
33 #include <sys/errno.h>
34
35 #include <dev/clock_subr.h>
36
37 #include <epoc32/windermere/windermerereg.h>
38 #include <epoc32/windermere/windermerevar.h>
39
40 #include "locators.h"
41
42 #define RTC_SIZE 0x100
43
44 struct wmrtc_softc {
45 device_t sc_dev;
46 bus_space_tag_t sc_iot;
47 bus_space_handle_t sc_ioh;
48
49 struct todr_chip_handle sc_todr;
50 };
51
52 static int wmrtc_match(device_t, cfdata_t, void *);
53 static void wmrtc_attach(device_t, device_t, void *);
54
55 /* todr(9) interfaces */
56 static int wmrtc_todr_gettime(todr_chip_handle_t, struct timeval *);
57 static int wmrtc_todr_settime(todr_chip_handle_t, struct timeval *);
58
59 CFATTACH_DECL_NEW(wmrtc, sizeof(struct wmrtc_softc),
60 wmrtc_match, wmrtc_attach, NULL, NULL);
61
62
63 /* ARGSUSED */
64 static int
wmrtc_match(device_t parent,cfdata_t match,void * aux)65 wmrtc_match(device_t parent, cfdata_t match, void *aux)
66 {
67 struct windermere_attach_args *aa = aux;
68
69 /* Wildcard not accept */
70 if (aa->aa_offset == WINDERMERECF_OFFSET_DEFAULT)
71 return 0;
72
73 aa->aa_size = RTC_SIZE;
74 return 1;
75 }
76
77 /* ARGSUSED */
78 static void
wmrtc_attach(device_t parent,device_t self,void * aux)79 wmrtc_attach(device_t parent, device_t self, void *aux)
80 {
81 struct wmrtc_softc *sc = device_private(self);
82 struct windermere_attach_args *aa = aux;
83
84 aprint_naive("\n");
85 aprint_normal("\n");
86
87 sc->sc_dev = self;
88 if (windermere_bus_space_subregion(aa->aa_iot, *aa->aa_ioh,
89 aa->aa_offset, aa->aa_size, &sc->sc_ioh) != 0) {
90 aprint_error_dev(self, "can't map registers\n");
91 return;
92 }
93 sc->sc_iot = aa->aa_iot;
94
95 /* XXXX: reset to compare registers */
96 bus_space_write_4(sc->sc_iot, sc->sc_ioh, RTC_MRL, 0);
97 bus_space_write_4(sc->sc_iot, sc->sc_ioh, RTC_MRH, 0);
98
99 sc->sc_todr.cookie = sc;
100 sc->sc_todr.todr_gettime = wmrtc_todr_gettime;
101 sc->sc_todr.todr_settime = wmrtc_todr_settime;
102 sc->sc_todr.todr_setwen = NULL;
103 todr_attach(&sc->sc_todr);
104 }
105
106 static int
wmrtc_todr_gettime(todr_chip_handle_t ch,struct timeval * tv)107 wmrtc_todr_gettime(todr_chip_handle_t ch, struct timeval *tv)
108 {
109 struct wmrtc_softc *sc = ch->cookie;
110
111 tv->tv_sec = bus_space_read_4(sc->sc_iot, sc->sc_ioh, RTC_DRL) & 0xffff;
112 tv->tv_sec |= (bus_space_read_4(sc->sc_iot, sc->sc_ioh, RTC_DRH) << 16);
113 tv->tv_usec = 0;
114 return 0;
115 }
116
117 static int
wmrtc_todr_settime(todr_chip_handle_t ch,struct timeval * tv)118 wmrtc_todr_settime(todr_chip_handle_t ch, struct timeval *tv)
119 {
120 struct wmrtc_softc *sc = ch->cookie;
121
122 bus_space_write_4(sc->sc_iot, sc->sc_ioh, RTC_DRL, tv->tv_sec & 0xffff);
123 bus_space_write_4(sc->sc_iot, sc->sc_ioh, RTC_DRH,
124 (tv->tv_sec >> 16) & 0xffff);
125 return 0;
126 }
127