timekeeper.c revision 1.2.36.1
1 /* $NetBSD: timekeeper.c,v 1.2.36.1 2006/09/09 02:40:57 rpaulo Exp $ */ 2 3 /*- 4 * Copyright (c) 2000 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Tohru Nishimura. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 40 41 __KERNEL_RCSID(0, "$NetBSD: timekeeper.c,v 1.2.36.1 2006/09/09 02:40:57 rpaulo Exp $"); 42 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/device.h> 46 #include <sys/kernel.h> 47 48 #include <machine/cpu.h> 49 50 #include <dev/clock_subr.h> 51 #include <luna68k/luna68k/clockvar.h> 52 #include <luna68k/dev/timekeeper.h> 53 #include <machine/autoconf.h> 54 55 #define YEAR0 1970 /* year offset */ 56 57 struct timekeeper_softc { 58 struct device sc_dev; 59 void *sc_clock, *sc_nvram; 60 int sc_nvramsize; 61 u_int8_t sc_image[2040]; 62 }; 63 64 static int clock_match __P((struct device *, struct cfdata *, void *)); 65 static void clock_attach __P((struct device *, struct device *, void *)); 66 67 CFATTACH_DECL(clock, sizeof (struct timekeeper_softc), 68 clock_match, clock_attach, NULL, NULL); 69 extern struct cfdriver clock_cd; 70 71 static void mkclock_get __P((struct device *, time_t, struct clock_ymdhms *)); 72 static void mkclock_set __P((struct device *, struct clock_ymdhms *)); 73 static void dsclock_get __P((struct device *, time_t, struct clock_ymdhms *)); 74 static void dsclock_set __P((struct device *, struct clock_ymdhms *)); 75 76 static struct clockfns mkclock_clockfns = { 77 NULL /* never used */, mkclock_get, mkclock_set, 78 }; 79 80 static struct clockfns dsclock_clockfns = { 81 NULL /* never used */, dsclock_get, dsclock_set, 82 }; 83 84 static int 85 clock_match(parent, match, aux) 86 struct device *parent; 87 struct cfdata *match; 88 void *aux; 89 { 90 struct mainbus_attach_args *ma = aux; 91 92 if (strcmp(ma->ma_name, clock_cd.cd_name)) 93 return 0; 94 return 1; 95 } 96 97 static void 98 clock_attach(parent, self, aux) 99 struct device *parent, *self; 100 void *aux; 101 { 102 struct timekeeper_softc *sc = (void *)self; 103 struct mainbus_attach_args *ma = aux; 104 struct clockfns *clockwork; 105 106 switch (machtype) { 107 default: 108 case LUNA_I: /* Mostek MK48T02 */ 109 sc->sc_clock = (void *)(ma->ma_addr + 2040); 110 sc->sc_nvram = (void *)ma->ma_addr; 111 sc->sc_nvramsize = 2040; 112 clockwork = &mkclock_clockfns; 113 printf(": mk48t02\n"); 114 break; 115 case LUNA_II: /* Dallas DS1287A */ 116 sc->sc_clock = (void *)ma->ma_addr; 117 sc->sc_nvram = (void *)(ma->ma_addr + 50); 118 sc->sc_nvramsize = 50; 119 clockwork = &dsclock_clockfns; 120 printf(": ds1287a\n"); 121 break; 122 } 123 clockattach(&sc->sc_dev, clockwork); 124 memcpy(sc->sc_image, sc->sc_nvram, sc->sc_nvramsize); 125 } 126 127 /* 128 * Get the time of day, based on the clock's value and/or the base value. 129 */ 130 static void 131 mkclock_get(dev, base, dt) 132 struct device *dev; 133 time_t base; 134 struct clock_ymdhms *dt; 135 { 136 struct timekeeper_softc *sc = (void *)dev; 137 volatile u_int8_t *chiptime = (void *)sc->sc_clock; 138 int s; 139 140 s = splclock(); 141 chiptime[MK_CSR] |= MK_CSR_READ; /* enable read (stop time) */ 142 dt->dt_sec = FROMBCD(chiptime[MK_SEC]); 143 dt->dt_min = FROMBCD(chiptime[MK_MIN]); 144 dt->dt_hour = FROMBCD(chiptime[MK_HOUR]); 145 dt->dt_wday = FROMBCD(chiptime[MK_DOW]); 146 dt->dt_day = FROMBCD(chiptime[MK_DOM]); 147 dt->dt_mon = FROMBCD(chiptime[MK_MONTH]); 148 dt->dt_year = FROMBCD(chiptime[MK_YEAR]) + YEAR0; 149 chiptime[MK_CSR] &= ~MK_CSR_READ; /* time wears on */ 150 splx(s); 151 #ifdef TIMEKEEPER_DEBUG 152 printf("get %d/%d/%d %d:%d:%d\n", 153 dt->dt_year, dt->dt_mon, dt->dt_day, 154 dt->dt_hour, dt->dt_min, dt->dt_sec); 155 #endif 156 } 157 158 /* 159 * Reset the TODR based on the time value. 160 */ 161 static void 162 mkclock_set(dev, dt) 163 struct device *dev; 164 struct clock_ymdhms *dt; 165 { 166 struct timekeeper_softc *sc = (void *)dev; 167 volatile u_int8_t *chiptime = (void *)sc->sc_clock; 168 volatile u_int8_t *stamp = (u_int8_t *)sc->sc_nvram + 0x10; 169 int s; 170 171 s = splclock(); 172 chiptime[MK_CSR] |= MK_CSR_WRITE; /* enable write */ 173 chiptime[MK_SEC] = TOBCD(dt->dt_sec); 174 chiptime[MK_MIN] = TOBCD(dt->dt_min); 175 chiptime[MK_HOUR] = TOBCD(dt->dt_hour); 176 chiptime[MK_DOW] = TOBCD(dt->dt_wday); 177 chiptime[MK_DOM] = TOBCD(dt->dt_day); 178 chiptime[MK_MONTH] = TOBCD(dt->dt_mon); 179 chiptime[MK_YEAR] = TOBCD(dt->dt_year - YEAR0); 180 chiptime[MK_CSR] &= ~MK_CSR_WRITE; /* load them up */ 181 splx(s); 182 #ifdef TIMEKEEPER_DEBUG 183 printf("set %d/%d/%d %d:%d:%d\n", 184 dt->dt_year, dt->dt_mon, dt->dt_day, 185 dt->dt_hour, dt->dt_min, dt->dt_sec); 186 #endif 187 188 stamp[0] = 'R'; stamp[1] = 'T'; stamp[2] = 'C'; stamp[3] = '\0'; 189 } 190 191 /* 192 * Get the time of day, based on the clock's value and/or the base value. 193 */ 194 static void 195 dsclock_get(dev, base, dt) 196 struct device *dev; 197 time_t base; 198 struct clock_ymdhms *dt; 199 { 200 struct timekeeper_softc *sc = (void *)dev; 201 volatile u_int8_t *chiptime = (void *)sc->sc_clock; 202 int s; 203 204 s = splclock(); 205 /* update in progress; spin loop */ 206 while (chiptime[MC_REGA] & MC_REGA_UIP) 207 ; 208 dt->dt_sec = chiptime[MC_SEC]; 209 dt->dt_min = chiptime[MC_MIN]; 210 dt->dt_hour = chiptime[MC_HOUR]; 211 dt->dt_wday = chiptime[MC_DOW]; 212 dt->dt_day = chiptime[MC_DOM]; 213 dt->dt_mon = chiptime[MC_MONTH]; 214 dt->dt_year = chiptime[MC_YEAR] + YEAR0; 215 splx(s); 216 } 217 218 /* 219 * Reset the TODR based on the time value. 220 */ 221 static void 222 dsclock_set(dev, dt) 223 struct device *dev; 224 struct clock_ymdhms *dt; 225 { 226 struct timekeeper_softc *sc = (void *)dev; 227 volatile u_int8_t *chiptime = (void *)sc->sc_clock; 228 int s; 229 230 s = splclock(); 231 chiptime[MC_REGB] |= MC_REGB_SET; /* enable write */ 232 chiptime[MC_SEC] = dt->dt_sec; 233 chiptime[MC_MIN] = dt->dt_min; 234 chiptime[MC_HOUR] = dt->dt_hour; 235 chiptime[MC_DOW] = dt->dt_wday; 236 chiptime[MC_DOM] = dt->dt_day; 237 chiptime[MC_MONTH] = dt->dt_mon; 238 chiptime[MC_YEAR] = dt->dt_year - YEAR0; 239 chiptime[MC_REGB] &= ~MC_REGB_SET; /* load them up */ 240 splx(s); 241 } 242
Indexes created Mon Oct 13 08:09:50 GMT 2025