1 /*-
2 * Copyright (c) 2016 Michal Meloun <mmel@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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.
13 *
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
24 * SUCH DAMAGE.
25 */
26
27 #include <sys/param.h>
28 #include <sys/systm.h>
29 #include <sys/bus.h>
30 #include <sys/clock.h>
31 #include <sys/kernel.h>
32
33 #include <dev/ofw/ofw_bus.h>
34
35 #include "clock_if.h"
36 #include "as3722.h"
37
38 #define AS3722_RTC_START_YEAR 2000
39
40 int
as3722_rtc_gettime(device_t dev,struct timespec * ts)41 as3722_rtc_gettime(device_t dev, struct timespec *ts)
42 {
43 struct as3722_softc *sc;
44 struct clocktime ct;
45 uint8_t buf[6];
46 int rv;
47
48 sc = device_get_softc(dev);
49
50 rv = as3722_read_buf(sc, AS3722_RTC_SECOND, buf, 6);
51 if (rv != 0) {
52 device_printf(sc->dev, "Failed to read RTC data\n");
53 return (rv);
54 }
55 ct.nsec = 0;
56 ct.sec = bcd2bin(buf[0] & 0x7F);
57 ct.min = bcd2bin(buf[1] & 0x7F);
58 ct.hour = bcd2bin(buf[2] & 0x3F);
59 ct.day = bcd2bin(buf[3] & 0x3F);
60 ct.mon = bcd2bin(buf[4] & 0x1F);
61 ct.year = bcd2bin(buf[5] & 0x7F) + AS3722_RTC_START_YEAR;
62 ct.dow = -1;
63
64 return clock_ct_to_ts(&ct, ts);
65 }
66
67 int
as3722_rtc_settime(device_t dev,struct timespec * ts)68 as3722_rtc_settime(device_t dev, struct timespec *ts)
69 {
70 struct as3722_softc *sc;
71 struct clocktime ct;
72 uint8_t buf[6];
73 int rv;
74
75 sc = device_get_softc(dev);
76 clock_ts_to_ct(ts, &ct);
77
78 if (ct.year < AS3722_RTC_START_YEAR)
79 return (EINVAL);
80
81 buf[0] = bin2bcd(ct.sec);
82 buf[1] = bin2bcd(ct.min);
83 buf[2] = bin2bcd(ct.hour);
84 buf[3] = bin2bcd(ct.day);
85 buf[4] = bin2bcd(ct.mon);
86 buf[5] = bin2bcd(ct.year - AS3722_RTC_START_YEAR);
87
88 rv = as3722_write_buf(sc, AS3722_RTC_SECOND, buf, 6);
89 if (rv != 0) {
90 device_printf(sc->dev, "Failed to write RTC data\n");
91 return (rv);
92 }
93 return (0);
94 }
95
96 int
as3722_rtc_attach(struct as3722_softc * sc,phandle_t node)97 as3722_rtc_attach(struct as3722_softc *sc, phandle_t node)
98 {
99 int rv;
100
101 /* Enable RTC, set 24 hours mode and alarms */
102 rv = RM1(sc, AS3722_RTC_CONTROL,
103 AS3722_RTC_ON | AS3722_RTC_ALARM_WAKEUP_EN | AS3722_RTC_AM_PM_MODE,
104 AS3722_RTC_ON | AS3722_RTC_ALARM_WAKEUP_EN);
105 if (rv < 0) {
106 device_printf(sc->dev, "Failed to initialize RTC controller\n");
107 return (ENXIO);
108 }
109 clock_register(sc->dev, 1000000);
110
111 return (0);
112 }
113