1 /* $NetBSD: clpsrtc.c,v 1.1 2013/04/28 11:57:13 kiyohara Exp $ */
2 /*
3 * Copyright (c) 2013 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: clpsrtc.c,v 1.1 2013/04/28 11:57:13 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 <arm/clps711x/clps711xreg.h>
38 #include <arm/clps711x/clpssocvar.h>
39
40 #include "locators.h"
41
42 struct clpsrtc_softc {
43 device_t sc_dev;
44 bus_space_tag_t sc_iot;
45 bus_space_handle_t sc_ioh;
46
47 struct todr_chip_handle sc_todr;
48 };
49
50 static int clpsrtc_match(device_t, cfdata_t, void *);
51 static void clpsrtc_attach(device_t, device_t, void *);
52
53 /* todr(9) interfaces */
54 static int clpsrtc_todr_gettime(todr_chip_handle_t, struct timeval *);
55 static int clpsrtc_todr_settime(todr_chip_handle_t, struct timeval *);
56
57 CFATTACH_DECL_NEW(clpsrtc, sizeof(struct clpsrtc_softc),
58 clpsrtc_match, clpsrtc_attach, NULL, NULL);
59
60
61 /* ARGSUSED */
62 static int
clpsrtc_match(device_t parent,cfdata_t match,void * aux)63 clpsrtc_match(device_t parent, cfdata_t match, void *aux)
64 {
65
66 return 1;
67 }
68
69 /* ARGSUSED */
70 static void
clpsrtc_attach(device_t parent,device_t self,void * aux)71 clpsrtc_attach(device_t parent, device_t self, void *aux)
72 {
73 struct clpsrtc_softc *sc = device_private(self);
74 struct clpssoc_attach_args *aa = aux;
75
76 aprint_naive("\n");
77 aprint_normal("\n");
78
79 sc->sc_dev = self;
80 sc->sc_iot = aa->aa_iot;
81 sc->sc_ioh = *aa->aa_ioh;
82
83 /* XXXX: reset to compare registers */
84 bus_space_write_4(sc->sc_iot, sc->sc_ioh, PS711X_RTCMR, 0);
85
86 sc->sc_todr.cookie = sc;
87 sc->sc_todr.todr_gettime = clpsrtc_todr_gettime;
88 sc->sc_todr.todr_settime = clpsrtc_todr_settime;
89 sc->sc_todr.todr_setwen = NULL;
90 todr_attach(&sc->sc_todr);
91 }
92
93 static int
clpsrtc_todr_gettime(todr_chip_handle_t ch,struct timeval * tv)94 clpsrtc_todr_gettime(todr_chip_handle_t ch, struct timeval *tv)
95 {
96 struct clpsrtc_softc *sc = ch->cookie;
97
98 tv->tv_sec = bus_space_read_4(sc->sc_iot, sc->sc_ioh, PS711X_RTCDR);
99 tv->tv_usec = 0;
100 return 0;
101 }
102
103 static int
clpsrtc_todr_settime(todr_chip_handle_t ch,struct timeval * tv)104 clpsrtc_todr_settime(todr_chip_handle_t ch, struct timeval *tv)
105 {
106 struct clpsrtc_softc *sc = ch->cookie;
107
108 bus_space_write_4(sc->sc_iot, sc->sc_ioh, PS711X_RTCDR, tv->tv_sec);
109 return 0;
110 }
111