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
41struct 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
47static int eprtc_match(device_t, cfdata_t, void *);
48static void eprtc_attach(device_t, device_t, void *);
49
50CFATTACH_DECL_NEW(eprtc, sizeof(struct eprtc_softc),
51	      eprtc_match, eprtc_attach, NULL, NULL);
52
53static int eprtc_gettime(struct todr_chip_handle *, struct timeval *);
54static int eprtc_settime(struct todr_chip_handle *, struct timeval *);
55
56static int
57eprtc_match(device_t parent, cfdata_t match, void *aux)
58{
59	return 1;
60}
61
62static void
63eprtc_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
84static int
85eprtc_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
94static int
95eprtc_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