2 * Copyright (c) 2016 Michal Meloun <mmel@FreeBSD.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
30 #include <sys/param.h>
31 #include <sys/systm.h>
33 #include <sys/clock.h>
34 #include <sys/kernel.h>
36 #include <dev/ofw/ofw_bus.h>
41 #define AS3722_RTC_START_YEAR 2000
44 as3722_rtc_gettime(device_t dev, struct timespec *ts)
46 struct as3722_softc *sc;
51 sc = device_get_softc(dev);
53 rv = as3722_read_buf(sc, AS3722_RTC_SECOND, buf, 6);
55 device_printf(sc->dev, "Failed to read RTC data\n");
59 ct.sec = bcd2bin(buf[0] & 0x7F);
60 ct.min = bcd2bin(buf[1] & 0x7F);
61 ct.hour = bcd2bin(buf[2] & 0x3F);
62 ct.day = bcd2bin(buf[3] & 0x3F);
63 ct.mon = bcd2bin(buf[4] & 0x1F);
64 ct.year = bcd2bin(buf[5] & 0x7F) + AS3722_RTC_START_YEAR;
67 return clock_ct_to_ts(&ct, ts);
71 as3722_rtc_settime(device_t dev, struct timespec *ts)
73 struct as3722_softc *sc;
78 sc = device_get_softc(dev);
79 clock_ts_to_ct(ts, &ct);
81 if (ct.year < AS3722_RTC_START_YEAR)
84 buf[0] = bin2bcd(ct.sec);
85 buf[1] = bin2bcd(ct.min);
86 buf[2] = bin2bcd(ct.hour);
87 buf[3] = bin2bcd(ct.day);
88 buf[4] = bin2bcd(ct.mon);
89 buf[5] = bin2bcd(ct.year - AS3722_RTC_START_YEAR);
91 rv = as3722_write_buf(sc, AS3722_RTC_SECOND, buf, 6);
93 device_printf(sc->dev, "Failed to write RTC data\n");
100 as3722_rtc_attach(struct as3722_softc *sc, phandle_t node)
104 /* Enable RTC, set 24 hours mode and alarms */
105 rv = RM1(sc, AS3722_RTC_CONTROL,
106 AS3722_RTC_ON | AS3722_RTC_ALARM_WAKEUP_EN | AS3722_RTC_AM_PM_MODE,
107 AS3722_RTC_ON | AS3722_RTC_ALARM_WAKEUP_EN);
109 device_printf(sc->dev, "Failed to initialize RTC controller\n");
112 clock_register(sc->dev, 1000000);