1 /* $NetBSD: rtclock.c,v 1.25 2023/12/20 00:40:44 thorpej Exp $ */
2
3 /*
4 * Copyright 1993, 1994 Masaru Oki
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed by Masaru Oki.
18 * 4. The name of the author may not be used to endorse or promote products
19 * derived from this software without specific prior written permission
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 /*
34 * X680x0 internal real time clock interface
35 * alarm is not supported.
36 */
37
38 #include <sys/cdefs.h>
39 __KERNEL_RCSID(0, "$NetBSD: rtclock.c,v 1.25 2023/12/20 00:40:44 thorpej Exp $");
40
41 #include <sys/param.h>
42 #include <sys/systm.h>
43 #include <sys/buf.h>
44 #include <sys/proc.h>
45 #include <sys/reboot.h>
46 #include <sys/file.h>
47 #include <sys/kernel.h>
48 #include <sys/device.h>
49
50 #include <machine/bus.h>
51
52 #include <dev/clock_subr.h>
53
54 #include <arch/x68k/dev/rtclock_var.h>
55 #include <arch/x68k/dev/intiovar.h>
56
57 static int rtgettod(todr_chip_handle_t, struct clock_ymdhms *);
58 static int rtsettod(todr_chip_handle_t, struct clock_ymdhms *);
59
60 static int rtc_match(device_t, cfdata_t, void *);
61 static void rtc_attach(device_t, device_t, void *);
62
63 CFATTACH_DECL_NEW(rtc, sizeof(struct rtc_softc),
64 rtc_match, rtc_attach, NULL, NULL);
65
66 static int rtc_attached;
67
68 static int
rtc_match(device_t parent,cfdata_t cf,void * aux)69 rtc_match(device_t parent, cfdata_t cf, void *aux)
70 {
71 struct intio_attach_args *ia = aux;
72
73 if (strcmp(ia->ia_name, "rtc") != 0)
74 return (0);
75 if (rtc_attached)
76 return (0);
77
78 /* fixed address */
79 if (ia->ia_addr != RTC_ADDR)
80 return (0);
81 if (ia->ia_intr != -1)
82 return (0);
83
84 return (1);
85 }
86
87 static void
rtc_attach(device_t parent,device_t self,void * aux)88 rtc_attach(device_t parent, device_t self, void *aux)
89 {
90 struct rtc_softc *sc = device_private(self);
91 struct intio_attach_args *ia = aux;
92 int r __diagused;
93
94 rtc_attached = 1;
95
96 ia->ia_size = 0x20;
97 r = intio_map_allocate_region(parent, ia, INTIO_MAP_ALLOCATE);
98 #ifdef DIAGNOSTIC
99 if (r)
100 panic("IO map for RTC corruption??");
101 #endif
102
103
104 sc->sc_bst = ia->ia_bst;
105 bus_space_map(sc->sc_bst, ia->ia_addr, 0x2000, 0, &sc->sc_bht);
106
107 sc->sc_todr.cookie = sc;
108 sc->sc_todr.todr_gettime_ymdhms = rtgettod;
109 sc->sc_todr.todr_settime_ymdhms = rtsettod;
110 todr_attach(&sc->sc_todr);
111
112 aprint_normal(": RP5C15\n");
113 }
114
115 static int
rtgettod(todr_chip_handle_t tch,struct clock_ymdhms * dt)116 rtgettod(todr_chip_handle_t tch, struct clock_ymdhms *dt)
117 {
118 struct rtc_softc *rtc = tch->cookie;
119
120 /* hold clock */
121 RTC_WRITE(RTC_MODE, RTC_HOLD_CLOCK);
122
123 /* read it */
124 dt->dt_sec = RTC_REG(RTC_SEC10) * 10 + RTC_REG(RTC_SEC);
125 dt->dt_min = RTC_REG(RTC_MIN10) * 10 + RTC_REG(RTC_MIN);
126 dt->dt_hour = RTC_REG(RTC_HOUR10) * 10 + RTC_REG(RTC_HOUR);
127 dt->dt_day = RTC_REG(RTC_DAY10) * 10 + RTC_REG(RTC_DAY);
128 dt->dt_mon = RTC_REG(RTC_MON10) * 10 + RTC_REG(RTC_MON);
129 dt->dt_year = RTC_REG(RTC_YEAR10) * 10 + RTC_REG(RTC_YEAR)
130 +RTC_BASE_YEAR;
131
132 /* let it run again.. */
133 RTC_WRITE(RTC_MODE, RTC_FREE_CLOCK);
134
135 return 0;
136 }
137
138 static int
rtsettod(todr_chip_handle_t tch,struct clock_ymdhms * dt)139 rtsettod(todr_chip_handle_t tch, struct clock_ymdhms *dt)
140 {
141 struct rtc_softc *rtc = tch->cookie;
142 u_char sec1, sec2;
143 u_char min1, min2;
144 u_char hour1, hour2;
145 u_char day1, day2;
146 u_char mon1, mon2;
147 u_char year1, year2;
148
149 /* prepare values to be written to clock */
150 sec1 = dt->dt_sec / 10;
151 sec2 = dt->dt_sec % 10;
152 min1 = dt->dt_min / 10;
153 min2 = dt->dt_min % 10;
154 hour1 = dt->dt_hour / 10;
155 hour2 = dt->dt_hour % 10;
156
157 day1 = dt->dt_day / 10;
158 day2 = dt->dt_day % 10;
159 mon1 = dt->dt_mon / 10;
160 mon2 = dt->dt_mon % 10;
161 year1 = (dt->dt_year - RTC_BASE_YEAR) / 10;
162 year2 = dt->dt_year % 10;
163
164 RTC_WRITE(RTC_MODE, RTC_HOLD_CLOCK);
165 RTC_WRITE(RTC_SEC10, sec1);
166 RTC_WRITE(RTC_SEC, sec2);
167 RTC_WRITE(RTC_MIN10, min1);
168 RTC_WRITE(RTC_MIN, min2);
169 RTC_WRITE(RTC_HOUR10, hour1);
170 RTC_WRITE(RTC_HOUR, hour2);
171 RTC_WRITE(RTC_DAY10, day1);
172 RTC_WRITE(RTC_DAY, day2);
173 RTC_WRITE(RTC_MON10, mon1);
174 RTC_WRITE(RTC_MON, mon2);
175 RTC_WRITE(RTC_YEAR10, year1);
176 RTC_WRITE(RTC_YEAR, year2);
177 RTC_WRITE(RTC_MODE, RTC_FREE_CLOCK);
178
179 return 0;
180 }
181