rtclock.c revision 1.17
1 /* $NetBSD: rtclock.c,v 1.17 2005/01/18 07:12:15 chs 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 1.17 2005/01/18 07:12:15 chs Exp $"); 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/buf.h> 44 #include <sys/malloc.h> 45 #include <sys/proc.h> 46 #include <sys/reboot.h> 47 #include <sys/file.h> 48 #include <sys/kernel.h> 49 #include <sys/device.h> 50 51 #include <machine/bus.h> 52 53 #include <dev/clock_subr.h> 54 55 #include <arch/x68k/dev/rtclock_var.h> 56 #include <arch/x68k/dev/intiovar.h> 57 58 static time_t rtgettod(void); 59 static int rtsettod(long); 60 61 static int rtc_match(struct device *, struct cfdata *, void *); 62 static void rtc_attach(struct device *, struct device *, void *); 63 64 int rtclockinit(void); 65 66 CFATTACH_DECL(rtc, sizeof(struct rtc_softc), 67 rtc_match, rtc_attach, NULL, NULL); 68 69 static int rtc_attached; 70 71 static int 72 rtc_match(struct device *parent, struct cfdata *cf, void *aux) 73 { 74 struct intio_attach_args *ia = aux; 75 76 if (strcmp (ia->ia_name, "rtc") != 0) 77 return (0); 78 if (rtc_attached) 79 return (0); 80 81 /* fixed address */ 82 if (ia->ia_addr != RTC_ADDR) 83 return (0); 84 if (ia->ia_intr != -1) 85 return (0); 86 87 return (1); 88 } 89 90 91 static struct rtc_softc *rtc; /* XXX: softc cache */ 92 93 static void 94 rtc_attach(struct device *parent, struct device *self, void *aux) 95 { 96 struct rtc_softc *sc = (struct rtc_softc *)self; 97 struct intio_attach_args *ia = aux; 98 int r; 99 100 rtc_attached = 1; 101 102 ia->ia_size = 0x20; 103 r = intio_map_allocate_region (parent, ia, INTIO_MAP_ALLOCATE); 104 #ifdef DIAGNOSTIC 105 if (r) 106 panic ("IO map for RTC corruption??"); 107 #endif 108 109 110 sc->sc_bst = ia->ia_bst; 111 bus_space_map(sc->sc_bst, ia->ia_addr, 0x2000, 0, &sc->sc_bht); 112 rtc = sc; 113 114 rtclockinit(); 115 printf (": RP5C15\n"); 116 } 117 118 119 120 /* 121 * x68k/clock.c calls thru the get/set tod vector, if it is set, to read 122 * the realtime clock. 123 */ 124 125 int 126 rtclockinit(void) 127 { 128 if (rtgettod()) { 129 gettod = rtgettod; 130 settod = rtsettod; 131 } else { 132 return 0; 133 } 134 return 1; 135 } 136 137 static time_t 138 rtgettod(void) 139 { 140 struct clock_ymdhms dt; 141 142 /* hold clock */ 143 RTC_WRITE(RTC_MODE, RTC_HOLD_CLOCK); 144 145 /* read it */ 146 dt.dt_sec = RTC_REG(RTC_SEC10) * 10 + RTC_REG(RTC_SEC); 147 dt.dt_min = RTC_REG(RTC_MIN10) * 10 + RTC_REG(RTC_MIN); 148 dt.dt_hour = RTC_REG(RTC_HOUR10) * 10 + RTC_REG(RTC_HOUR); 149 dt.dt_day = RTC_REG(RTC_DAY10) * 10 + RTC_REG(RTC_DAY); 150 dt.dt_mon = RTC_REG(RTC_MON10) * 10 + RTC_REG(RTC_MON); 151 dt.dt_year = RTC_REG(RTC_YEAR10) * 10 + RTC_REG(RTC_YEAR) 152 +RTC_BASE_YEAR; 153 154 /* let it run again.. */ 155 RTC_WRITE(RTC_MODE, RTC_FREE_CLOCK); 156 157 #ifdef DIAGNOSTIC 158 range_test0(dt.dt_hour, 23); 159 range_test(dt.dt_day, 1, 31); 160 range_test(dt.dt_mon, 1, 12); 161 range_test(dt.dt_year, RTC_BASE_YEAR, RTC_BASE_YEAR+100-1); 162 #endif 163 164 return clock_ymdhms_to_secs (&dt) + rtc_offset * 60; 165 } 166 167 static int 168 rtsettod(time_t tim) 169 { 170 struct clock_ymdhms dt; 171 u_char sec1, sec2; 172 u_char min1, min2; 173 u_char hour1, hour2; 174 u_char day1, day2; 175 u_char mon1, mon2; 176 u_char year1, year2; 177 178 clock_secs_to_ymdhms (tim - rtc_offset * 60, &dt); 179 180 /* prepare values to be written to clock */ 181 sec1 = dt.dt_sec / 10; 182 sec2 = dt.dt_sec % 10; 183 min1 = dt.dt_min / 10; 184 min2 = dt.dt_min % 10; 185 hour1 = dt.dt_hour / 10; 186 hour2 = dt.dt_hour % 10; 187 188 day1 = dt.dt_day / 10; 189 day2 = dt.dt_day % 10; 190 mon1 = dt.dt_mon / 10; 191 mon2 = dt.dt_mon % 10; 192 year1 = (dt.dt_year - RTC_BASE_YEAR) / 10; 193 year2 = dt.dt_year % 10; 194 195 RTC_WRITE(RTC_MODE, RTC_HOLD_CLOCK); 196 RTC_WRITE(RTC_SEC10, sec1); 197 RTC_WRITE(RTC_SEC, sec2); 198 RTC_WRITE(RTC_MIN10, min1); 199 RTC_WRITE(RTC_MIN, min2); 200 RTC_WRITE(RTC_HOUR10, hour1); 201 RTC_WRITE(RTC_HOUR, hour2); 202 RTC_WRITE(RTC_DAY10, day1); 203 RTC_WRITE(RTC_DAY, day2); 204 RTC_WRITE(RTC_MON10, mon1); 205 RTC_WRITE(RTC_MON, mon2); 206 RTC_WRITE(RTC_YEAR10, year1); 207 RTC_WRITE(RTC_YEAR, year2); 208 RTC_WRITE(RTC_MODE, RTC_FREE_CLOCK); 209 210 return 1; 211 } 212
Indexes created Thu Sep 25 16:09:42 GMT 2025