1 /* $NetBSD: rtclock.c,v 1.16 2004/12/13 02:14:14 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 1.16 2004/12/13 02:14:14 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 __P((void)); 59 static int rtsettod __P((long)); 60 61 static int rtc_match __P((struct device *, struct cfdata *, void *)); 62 static void rtc_attach __P((struct device *, struct device *, void *)); 63 64 int rtclockinit __P((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(parent, cf, aux) 73 struct device *parent; 74 struct cfdata *cf; 75 void *aux; 76 { 77 struct intio_attach_args *ia = aux; 78 79 if (strcmp (ia->ia_name, "rtc") != 0) 80 return (0); 81 if (rtc_attached) 82 return (0); 83 84 /* fixed address */ 85 if (ia->ia_addr != RTC_ADDR) 86 return (0); 87 if (ia->ia_intr != -1) 88 return (0); 89 90 return (1); 91 } 92 93 94 static struct rtc_softc *rtc; /* XXX: softc cache */ 95 96 static void 97 rtc_attach(parent, self, aux) 98 struct device *parent, *self; 99 void *aux; 100 { 101 struct rtc_softc *sc = (struct rtc_softc *)self; 102 struct intio_attach_args *ia = aux; 103 int r; 104 105 rtc_attached = 1; 106 107 ia->ia_size = 0x20; 108 r = intio_map_allocate_region (parent, ia, INTIO_MAP_ALLOCATE); 109 #ifdef DIAGNOSTIC 110 if (r) 111 panic ("IO map for RTC corruption??"); 112 #endif 113 114 115 sc->sc_bst = ia->ia_bst; 116 bus_space_map(sc->sc_bst, ia->ia_addr, 0x2000, 0, &sc->sc_bht); 117 rtc = sc; 118 119 rtclockinit(); 120 printf (": RP5C15\n"); 121 } 122 123 124 125 /* 126 * x68k/clock.c calls thru the get/set tod vector, if it is set, to read 127 * the realtime clock. 128 */ 129 130 int 131 rtclockinit() 132 { 133 if (rtgettod()) { 134 gettod = rtgettod; 135 settod = rtsettod; 136 } else { 137 return 0; 138 } 139 return 1; 140 } 141 142 static time_t 143 rtgettod() 144 { 145 struct clock_ymdhms dt; 146 147 /* hold clock */ 148 RTC_WRITE(RTC_MODE, RTC_HOLD_CLOCK); 149 150 /* read it */ 151 dt.dt_sec = RTC_REG(RTC_SEC10) * 10 + RTC_REG(RTC_SEC); 152 dt.dt_min = RTC_REG(RTC_MIN10) * 10 + RTC_REG(RTC_MIN); 153 dt.dt_hour = RTC_REG(RTC_HOUR10) * 10 + RTC_REG(RTC_HOUR); 154 dt.dt_day = RTC_REG(RTC_DAY10) * 10 + RTC_REG(RTC_DAY); 155 dt.dt_mon = RTC_REG(RTC_MON10) * 10 + RTC_REG(RTC_MON); 156 dt.dt_year = RTC_REG(RTC_YEAR10) * 10 + RTC_REG(RTC_YEAR) 157 +RTC_BASE_YEAR; 158 159 /* let it run again.. */ 160 RTC_WRITE(RTC_MODE, RTC_FREE_CLOCK); 161 162 #ifdef DIAGNOSTIC 163 range_test0(dt.dt_hour, 23); 164 range_test(dt.dt_day, 1, 31); 165 range_test(dt.dt_mon, 1, 12); 166 range_test(dt.dt_year, RTC_BASE_YEAR, RTC_BASE_YEAR+100-1); 167 #endif 168 169 return clock_ymdhms_to_secs (&dt) + rtc_offset * 60; 170 } 171 172 static int 173 rtsettod (tim) 174 time_t tim; 175 { 176 struct clock_ymdhms dt; 177 u_char sec1, sec2; 178 u_char min1, min2; 179 u_char hour1, hour2; 180 u_char day1, day2; 181 u_char mon1, mon2; 182 u_char year1, year2; 183 184 clock_secs_to_ymdhms (tim - rtc_offset * 60, &dt); 185 186 /* prepare values to be written to clock */ 187 sec1 = dt.dt_sec / 10; 188 sec2 = dt.dt_sec % 10; 189 min1 = dt.dt_min / 10; 190 min2 = dt.dt_min % 10; 191 hour1 = dt.dt_hour / 10; 192 hour2 = dt.dt_hour % 10; 193 194 day1 = dt.dt_day / 10; 195 day2 = dt.dt_day % 10; 196 mon1 = dt.dt_mon / 10; 197 mon2 = dt.dt_mon % 10; 198 year1 = (dt.dt_year - RTC_BASE_YEAR) / 10; 199 year2 = dt.dt_year % 10; 200 201 RTC_WRITE(RTC_MODE, RTC_HOLD_CLOCK); 202 RTC_WRITE(RTC_SEC10, sec1); 203 RTC_WRITE(RTC_SEC, sec2); 204 RTC_WRITE(RTC_MIN10, min1); 205 RTC_WRITE(RTC_MIN, min2); 206 RTC_WRITE(RTC_HOUR10, hour1); 207 RTC_WRITE(RTC_HOUR, hour2); 208 RTC_WRITE(RTC_DAY10, day1); 209 RTC_WRITE(RTC_DAY, day2); 210 RTC_WRITE(RTC_MON10, mon1); 211 RTC_WRITE(RTC_MON, mon2); 212 RTC_WRITE(RTC_YEAR10, year1); 213 RTC_WRITE(RTC_YEAR, year2); 214 RTC_WRITE(RTC_MODE, RTC_FREE_CLOCK); 215 216 return 1; 217 } 218