1 /* $NetBSD: eprtc.c,v 1.7 2021/11/21 08:25:26 skrll Exp $ */
2
3 /*
4 * Copyright (c) 2005 HAMAJIMA Katsuomi. 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 AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28 #include <sys/cdefs.h>
29 __KERNEL_RCSID(0, "$NetBSD: eprtc.c,v 1.7 2021/11/21 08:25:26 skrll Exp $");
30
31 #include <sys/param.h>
32 #include <sys/systm.h>
33 #include <sys/kernel.h>
34 #include <sys/device.h>
35 #include <dev/clock_subr.h>
36 #include <sys/bus.h>
37 #include <arm/ep93xx/ep93xxvar.h>
38 #include <arm/ep93xx/epsocvar.h>
39 #include <arm/ep93xx/eprtcreg.h>
40
41 struct eprtc_softc {
42 bus_space_tag_t sc_iot;
43 bus_space_handle_t sc_ioh;
44 struct todr_chip_handle sc_todr;
45 };
46
47 static int eprtc_match(device_t, cfdata_t, void *);
48 static void eprtc_attach(device_t, device_t, void *);
49
50 CFATTACH_DECL_NEW(eprtc, sizeof(struct eprtc_softc),
51 eprtc_match, eprtc_attach, NULL, NULL);
52
53 static int eprtc_gettime(struct todr_chip_handle *, struct timeval *);
54 static int eprtc_settime(struct todr_chip_handle *, struct timeval *);
55
56 static int
eprtc_match(device_t parent,cfdata_t match,void * aux)57 eprtc_match(device_t parent, cfdata_t match, void *aux)
58 {
59 return 1;
60 }
61
62 static void
eprtc_attach(device_t parent,device_t self,void * aux)63 eprtc_attach(device_t parent, device_t self, void *aux)
64 {
65 struct eprtc_softc *sc = device_private(self);
66 struct epsoc_attach_args *sa = aux;
67
68 printf("\n");
69 sc->sc_iot = sa->sa_iot;
70
71 if (bus_space_map(sa->sa_iot, sa->sa_addr,
72 sa->sa_size, 0, &sc->sc_ioh)) {
73 printf("%s: Cannot map registers", device_xname(self));
74 return;
75 }
76
77 sc->sc_todr.cookie = sc;
78 sc->sc_todr.todr_gettime = eprtc_gettime;
79 sc->sc_todr.todr_settime = eprtc_settime;
80 sc->sc_todr.todr_setwen = NULL;
81 todr_attach(&sc->sc_todr);
82 }
83
84 static int
eprtc_gettime(struct todr_chip_handle * ch,struct timeval * tv)85 eprtc_gettime(struct todr_chip_handle *ch, struct timeval *tv)
86 {
87 struct eprtc_softc *sc = ch->cookie;
88
89 tv->tv_sec = bus_space_read_4(sc->sc_iot, sc->sc_ioh, EP93XX_RTC_Data);
90 tv->tv_usec = 0;
91 return 0;
92 }
93
94 static int
eprtc_settime(struct todr_chip_handle * ch,struct timeval * tv)95 eprtc_settime(struct todr_chip_handle *ch, struct timeval *tv)
96 {
97 struct eprtc_softc *sc = ch->cookie;
98
99 bus_space_write_4(sc->sc_iot, sc->sc_ioh, EP93XX_RTC_Load, tv->tv_sec);
100 return 0;
101 }
102