rtclock.c revision 1.14
1 /* $NetBSD: rtclock.c,v 1.14 2002/10/02 16:02:43 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/param.h> 39 #include <sys/systm.h> 40 #include <sys/buf.h> 41 #include <sys/malloc.h> 42 #include <sys/proc.h> 43 #include <sys/reboot.h> 44 #include <sys/file.h> 45 #include <sys/kernel.h> 46 #include <sys/device.h> 47 48 #include <machine/bus.h> 49 50 #include <dev/clock_subr.h> 51 52 #include <arch/x68k/dev/rtclock_var.h> 53 #include <arch/x68k/dev/intiovar.h> 54 55 static time_t rtgettod __P((void)); 56 static int rtsettod __P((long)); 57 58 static int rtc_match __P((struct device *, struct cfdata *, void *)); 59 static void rtc_attach __P((struct device *, struct device *, void *)); 60 61 int rtclockinit __P((void)); 62 63 CFATTACH_DECL(rtc, sizeof(struct rtc_softc), 64 rtc_match, rtc_attach, NULL, NULL); 65 66 static int 67 rtc_match(parent, cf, aux) 68 struct device *parent; 69 struct cfdata *cf; 70 void *aux; 71 { 72 struct intio_attach_args *ia = aux; 73 74 if (strcmp (ia->ia_name, "rtc") != 0) 75 return (0); 76 if (cf->cf_unit != 0) 77 return (0); 78 79 /* fixed address */ 80 if (ia->ia_addr != RTC_ADDR) 81 return (0); 82 if (ia->ia_intr != -1) 83 return (0); 84 85 return (1); 86 } 87 88 89 static struct rtc_softc *rtc; /* XXX: softc cache */ 90 91 static void 92 rtc_attach(parent, self, aux) 93 struct device *parent, *self; 94 void *aux; 95 { 96 struct rtc_softc *sc = (struct rtc_softc *)self; 97 struct intio_attach_args *ia = aux; 98 int r; 99 100 ia->ia_size = 0x20; 101 r = intio_map_allocate_region (parent, ia, INTIO_MAP_ALLOCATE); 102 #ifdef DIAGNOSTIC 103 if (r) 104 panic ("IO map for RTC corruption??"); 105 #endif 106 107 108 sc->sc_bst = ia->ia_bst; 109 bus_space_map(sc->sc_bst, ia->ia_addr, 0x2000, 0, &sc->sc_bht); 110 rtc = sc; 111 112 rtclockinit(); 113 printf (": RP5C15\n"); 114 } 115 116 117 118 /* 119 * x68k/clock.c calls thru the get/set tod vector, if it is set, to read 120 * the realtime clock. 121 */ 122 123 int 124 rtclockinit() 125 { 126 if (rtgettod()) { 127 gettod = rtgettod; 128 settod = rtsettod; 129 } else { 130 return 0; 131 } 132 return 1; 133 } 134 135 static time_t 136 rtgettod() 137 { 138 struct clock_ymdhms dt; 139 140 /* hold clock */ 141 RTC_WRITE(RTC_MODE, RTC_HOLD_CLOCK); 142 143 /* read it */ 144 dt.dt_sec = RTC_REG(RTC_SEC10) * 10 + RTC_REG(RTC_SEC); 145 dt.dt_min = RTC_REG(RTC_MIN10) * 10 + RTC_REG(RTC_MIN); 146 dt.dt_hour = RTC_REG(RTC_HOUR10) * 10 + RTC_REG(RTC_HOUR); 147 dt.dt_day = RTC_REG(RTC_DAY10) * 10 + RTC_REG(RTC_DAY); 148 dt.dt_mon = RTC_REG(RTC_MON10) * 10 + RTC_REG(RTC_MON); 149 dt.dt_year = RTC_REG(RTC_YEAR10) * 10 + RTC_REG(RTC_YEAR) 150 +RTC_BASE_YEAR; 151 152 /* let it run again.. */ 153 RTC_WRITE(RTC_MODE, RTC_FREE_CLOCK); 154 155 #ifdef DIAGNOSTIC 156 range_test0(dt.dt_hour, 23); 157 range_test(dt.dt_day, 1, 31); 158 range_test(dt.dt_mon, 1, 12); 159 range_test(dt.dt_year, RTC_BASE_YEAR, RTC_BASE_YEAR+100-1); 160 #endif 161 162 return clock_ymdhms_to_secs (&dt) + rtc_offset * 60; 163 } 164 165 static int 166 rtsettod (tim) 167 time_t tim; 168 { 169 struct clock_ymdhms dt; 170 u_char sec1, sec2; 171 u_char min1, min2; 172 u_char hour1, hour2; 173 u_char day1, day2; 174 u_char mon1, mon2; 175 u_char year1, year2; 176 177 clock_secs_to_ymdhms (tim - rtc_offset * 60, &dt); 178 179 /* prepare values to be written to clock */ 180 sec1 = dt.dt_sec / 10; 181 sec2 = dt.dt_sec % 10; 182 min1 = dt.dt_min / 10; 183 min2 = dt.dt_min % 10; 184 hour1 = dt.dt_hour / 10; 185 hour2 = dt.dt_hour % 10; 186 187 day1 = dt.dt_day / 10; 188 day2 = dt.dt_day % 10; 189 mon1 = dt.dt_mon / 10; 190 mon2 = dt.dt_mon % 10; 191 year1 = (dt.dt_year - RTC_BASE_YEAR) / 10; 192 year2 = dt.dt_year % 10; 193 194 RTC_WRITE(RTC_MODE, RTC_HOLD_CLOCK); 195 RTC_WRITE(RTC_SEC10, sec1); 196 RTC_WRITE(RTC_SEC, sec2); 197 RTC_WRITE(RTC_MIN10, min1); 198 RTC_WRITE(RTC_MIN, min2); 199 RTC_WRITE(RTC_HOUR10, hour1); 200 RTC_WRITE(RTC_HOUR, hour2); 201 RTC_WRITE(RTC_DAY10, day1); 202 RTC_WRITE(RTC_DAY, day2); 203 RTC_WRITE(RTC_MON10, mon1); 204 RTC_WRITE(RTC_MON, mon2); 205 RTC_WRITE(RTC_YEAR10, year1); 206 RTC_WRITE(RTC_YEAR, year2); 207 RTC_WRITE(RTC_MODE, RTC_FREE_CLOCK); 208 209 return 1; 210 } 211
Indexes created Tue Sep 23 14:10:03 GMT 2025