1 /* $NetBSD: timekeeper.c,v 1.1 2000/01/05 08:48:56 nisimura 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 1.1 2000/01/05 08:48:56 nisimura 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 /* 65 * BCD to decimal and decimal to BCD. 66 */ 67 #define FROMBCD(x) (((x) >> 4) * 10 + ((x) & 0xf)) 68 #define TOBCD(x) (((x) / 10 * 16) + ((x) % 10)) 69 70 static int clock_match __P((struct device *, struct cfdata *, void *)); 71 static void clock_attach __P((struct device *, struct device *, void *)); 72 73 const struct cfattach clock_ca = { 74 sizeof (struct timekeeper_softc), clock_match, clock_attach 75 }; 76 extern struct cfdriver clock_cd; 77 78 static void mkclock_get __P((struct device *, time_t, struct clock_ymdhms *)); 79 static void mkclock_set __P((struct device *, struct clock_ymdhms *)); 80 static void dsclock_get __P((struct device *, time_t, struct clock_ymdhms *)); 81 static void dsclock_set __P((struct device *, struct clock_ymdhms *)); 82 83 static struct clockfns mkclock_clockfns = { 84 NULL /* never used */, mkclock_get, mkclock_set, 85 }; 86 87 static struct clockfns dsclock_clockfns = { 88 NULL /* never used */, dsclock_get, dsclock_set, 89 }; 90 91 static int 92 clock_match(parent, match, aux) 93 struct device *parent; 94 struct cfdata *match; 95 void *aux; 96 { 97 struct mainbus_attach_args *ma = aux; 98 99 if (strcmp(ma->ma_name, clock_cd.cd_name)) 100 return 0; 101 return 1; 102 } 103 104 static void 105 clock_attach(parent, self, aux) 106 struct device *parent, *self; 107 void *aux; 108 { 109 struct timekeeper_softc *sc = (void *)self; 110 struct mainbus_attach_args *ma = aux; 111 struct clockfns *clockwork; 112 113 switch (machtype) { 114 default: 115 case LUNA_I: /* Mostek MK48T02 */ 116 sc->sc_clock = (void *)(ma->ma_addr + 2040); 117 sc->sc_nvram = (void *)ma->ma_addr; 118 sc->sc_nvramsize = 2040; 119 clockwork = &mkclock_clockfns; 120 printf(": mk48t02\n"); 121 break; 122 case LUNA_II: /* Dallas DS1287A */ 123 sc->sc_clock = (void *)ma->ma_addr; 124 sc->sc_nvram = (void *)(ma->ma_addr + 50); 125 sc->sc_nvramsize = 50; 126 clockwork = &dsclock_clockfns; 127 printf(": ds1287a\n"); 128 break; 129 } 130 clockattach(&sc->sc_dev, clockwork); 131 memcpy(sc->sc_image, sc->sc_nvram, sc->sc_nvramsize); 132 } 133 134 /* 135 * Get the time of day, based on the clock's value and/or the base value. 136 */ 137 static void 138 mkclock_get(dev, base, dt) 139 struct device *dev; 140 time_t base; 141 struct clock_ymdhms *dt; 142 { 143 struct timekeeper_softc *sc = (void *)dev; 144 volatile u_int8_t *chiptime = (void *)sc->sc_clock; 145 int s; 146 147 s = splclock(); 148 chiptime[MK_CSR] |= MK_CSR_READ; /* enable read (stop time) */ 149 dt->dt_sec = FROMBCD(chiptime[MK_SEC]); 150 dt->dt_min = FROMBCD(chiptime[MK_MIN]); 151 dt->dt_hour = FROMBCD(chiptime[MK_HOUR]); 152 dt->dt_wday = FROMBCD(chiptime[MK_DOW]); 153 dt->dt_day = FROMBCD(chiptime[MK_DOM]); 154 dt->dt_mon = FROMBCD(chiptime[MK_MONTH]); 155 dt->dt_year = FROMBCD(chiptime[MK_YEAR]) + YEAR0; 156 chiptime[MK_CSR] &= ~MK_CSR_READ; /* time wears on */ 157 splx(s); 158 #ifdef TIMEKEEPER_DEBUG 159 printf("get %d/%d/%d %d:%d:%d\n", 160 dt->dt_year, dt->dt_mon, dt->dt_day, 161 dt->dt_hour, dt->dt_min, dt->dt_sec); 162 #endif 163 } 164 165 /* 166 * Reset the TODR based on the time value. 167 */ 168 static void 169 mkclock_set(dev, dt) 170 struct device *dev; 171 struct clock_ymdhms *dt; 172 { 173 struct timekeeper_softc *sc = (void *)dev; 174 volatile u_int8_t *chiptime = (void *)sc->sc_clock; 175 volatile u_int8_t *stamp = (u_int8_t *)sc->sc_nvram + 0x10; 176 int s; 177 178 s = splclock(); 179 chiptime[MK_CSR] |= MK_CSR_WRITE; /* enable write */ 180 chiptime[MK_SEC] = TOBCD(dt->dt_sec); 181 chiptime[MK_MIN] = TOBCD(dt->dt_min); 182 chiptime[MK_HOUR] = TOBCD(dt->dt_hour); 183 chiptime[MK_DOW] = TOBCD(dt->dt_wday); 184 chiptime[MK_DOM] = TOBCD(dt->dt_day); 185 chiptime[MK_MONTH] = TOBCD(dt->dt_mon); 186 chiptime[MK_YEAR] = TOBCD(dt->dt_year - YEAR0); 187 chiptime[MK_CSR] &= ~MK_CSR_WRITE; /* load them up */ 188 splx(s); 189 #ifdef TIMEKEEPER_DEBUG 190 printf("set %d/%d/%d %d:%d:%d\n", 191 dt->dt_year, dt->dt_mon, dt->dt_day, 192 dt->dt_hour, dt->dt_min, dt->dt_sec); 193 #endif 194 195 stamp[0] = 'R'; stamp[1] = 'T'; stamp[2] = 'C'; stamp[3] = '\0'; 196 } 197 198 /* 199 * Get the time of day, based on the clock's value and/or the base value. 200 */ 201 static void 202 dsclock_get(dev, base, dt) 203 struct device *dev; 204 time_t base; 205 struct clock_ymdhms *dt; 206 { 207 struct timekeeper_softc *sc = (void *)dev; 208 volatile u_int8_t *chiptime = (void *)sc->sc_clock; 209 int s; 210 211 s = splclock(); 212 /* update in progress; spin loop */ 213 while (chiptime[MC_REGA] & MC_REGA_UIP) 214 ; 215 dt->dt_sec = chiptime[MC_SEC]; 216 dt->dt_min = chiptime[MC_MIN]; 217 dt->dt_hour = chiptime[MC_HOUR]; 218 dt->dt_wday = chiptime[MC_DOW]; 219 dt->dt_day = chiptime[MC_DOM]; 220 dt->dt_mon = chiptime[MC_MONTH]; 221 dt->dt_year = chiptime[MC_YEAR] + YEAR0; 222 splx(s); 223 } 224 225 /* 226 * Reset the TODR based on the time value. 227 */ 228 static void 229 dsclock_set(dev, dt) 230 struct device *dev; 231 struct clock_ymdhms *dt; 232 { 233 struct timekeeper_softc *sc = (void *)dev; 234 volatile u_int8_t *chiptime = (void *)sc->sc_clock; 235 int s; 236 237 s = splclock(); 238 chiptime[MC_REGB] |= MC_REGB_SET; /* enable write */ 239 chiptime[MC_SEC] = dt->dt_sec; 240 chiptime[MC_MIN] = dt->dt_min; 241 chiptime[MC_HOUR] = dt->dt_hour; 242 chiptime[MC_DOW] = dt->dt_wday; 243 chiptime[MC_DOM] = dt->dt_day; 244 chiptime[MC_MONTH] = dt->dt_mon; 245 chiptime[MC_YEAR] = dt->dt_year - YEAR0; 246 chiptime[MC_REGB] &= ~MC_REGB_SET; /* load them up */ 247 splx(s); 248 } 249