timekeeper.c revision 1.4.56.1
1 /* $NetBSD: timekeeper.c,v 1.4.56.1 2008/05/18 12:32:19 yamt 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 33 34 __KERNEL_RCSID(0, "$NetBSD: timekeeper.c,v 1.4.56.1 2008/05/18 12:32:19 yamt Exp $"); 35 36 #include <sys/param.h> 37 #include <sys/systm.h> 38 #include <sys/device.h> 39 #include <sys/kernel.h> 40 41 #include <machine/cpu.h> 42 43 #include <dev/clock_subr.h> 44 #include <luna68k/dev/timekeeper.h> 45 #include <machine/autoconf.h> 46 47 #define YEAR0 1970 /* year offset */ 48 49 struct timekeeper_softc { 50 struct device sc_dev; 51 void *sc_clock, *sc_nvram; 52 int sc_nvramsize; 53 u_int8_t sc_image[2040]; 54 struct todr_chip_handle sc_todr; 55 }; 56 57 static int clock_match __P((struct device *, struct cfdata *, void *)); 58 static void clock_attach __P((struct device *, struct device *, void *)); 59 60 CFATTACH_DECL(clock, sizeof (struct timekeeper_softc), 61 clock_match, clock_attach, NULL, NULL); 62 extern struct cfdriver clock_cd; 63 64 static int mkclock_get __P((todr_chip_handle_t, struct clock_ymdhms *)); 65 static int mkclock_set __P((todr_chip_handle_t, struct clock_ymdhms *)); 66 static int dsclock_get __P((todr_chip_handle_t, struct clock_ymdhms *)); 67 static int dsclock_set __P((todr_chip_handle_t, struct clock_ymdhms *)); 68 69 static int 70 clock_match(parent, match, aux) 71 struct device *parent; 72 struct cfdata *match; 73 void *aux; 74 { 75 struct mainbus_attach_args *ma = aux; 76 77 if (strcmp(ma->ma_name, clock_cd.cd_name)) 78 return 0; 79 return 1; 80 } 81 82 static void 83 clock_attach(parent, self, aux) 84 struct device *parent, *self; 85 void *aux; 86 { 87 struct timekeeper_softc *sc = (void *)self; 88 struct mainbus_attach_args *ma = aux; 89 90 switch (machtype) { 91 default: 92 case LUNA_I: /* Mostek MK48T02 */ 93 sc->sc_clock = (void *)(ma->ma_addr + 2040); 94 sc->sc_nvram = (void *)ma->ma_addr; 95 sc->sc_nvramsize = 2040; 96 sc->sc_todr.todr_gettime_ymdhms = mkclock_get; 97 sc->sc_todr.todr_settime_ymdhms = mkclock_set; 98 sc->sc_todr.cookie = sc; 99 printf(": mk48t02\n"); 100 break; 101 case LUNA_II: /* Dallas DS1287A */ 102 sc->sc_clock = (void *)ma->ma_addr; 103 sc->sc_nvram = (void *)(ma->ma_addr + 50); 104 sc->sc_nvramsize = 50; 105 sc->sc_todr.todr_gettime_ymdhms = dsclock_get; 106 sc->sc_todr.todr_settime_ymdhms = dsclock_set; 107 sc->sc_todr.cookie = sc; 108 printf(": ds1287a\n"); 109 break; 110 } 111 todr_attach(&sc->sc_todr); 112 memcpy(sc->sc_image, sc->sc_nvram, sc->sc_nvramsize); 113 } 114 115 /* 116 * Get the time of day, based on the clock's value and/or the base value. 117 */ 118 static int 119 mkclock_get(todr_chip_handle_t tch, struct clock_ymdhms *dt) 120 { 121 struct timekeeper_softc *sc = (void *)tch->cookie; 122 volatile u_int8_t *chiptime = (void *)sc->sc_clock; 123 int s; 124 125 s = splclock(); 126 chiptime[MK_CSR] |= MK_CSR_READ; /* enable read (stop time) */ 127 dt->dt_sec = FROMBCD(chiptime[MK_SEC]); 128 dt->dt_min = FROMBCD(chiptime[MK_MIN]); 129 dt->dt_hour = FROMBCD(chiptime[MK_HOUR]); 130 dt->dt_wday = FROMBCD(chiptime[MK_DOW]); 131 dt->dt_day = FROMBCD(chiptime[MK_DOM]); 132 dt->dt_mon = FROMBCD(chiptime[MK_MONTH]); 133 dt->dt_year = FROMBCD(chiptime[MK_YEAR]) + YEAR0; 134 chiptime[MK_CSR] &= ~MK_CSR_READ; /* time wears on */ 135 splx(s); 136 return 0; 137 } 138 139 /* 140 * Reset the TODR based on the time value. 141 */ 142 static int 143 mkclock_set(todr_chip_handle_t tch, struct clock_ymdhms *dt) 144 { 145 struct timekeeper_softc *sc = (void *)tch->cookie; 146 volatile u_int8_t *chiptime = (void *)sc->sc_clock; 147 volatile u_int8_t *stamp = (u_int8_t *)sc->sc_nvram + 0x10; 148 int s; 149 150 s = splclock(); 151 chiptime[MK_CSR] |= MK_CSR_WRITE; /* enable write */ 152 chiptime[MK_SEC] = TOBCD(dt->dt_sec); 153 chiptime[MK_MIN] = TOBCD(dt->dt_min); 154 chiptime[MK_HOUR] = TOBCD(dt->dt_hour); 155 chiptime[MK_DOW] = TOBCD(dt->dt_wday); 156 chiptime[MK_DOM] = TOBCD(dt->dt_day); 157 chiptime[MK_MONTH] = TOBCD(dt->dt_mon); 158 chiptime[MK_YEAR] = TOBCD(dt->dt_year - YEAR0); 159 chiptime[MK_CSR] &= ~MK_CSR_WRITE; /* load them up */ 160 splx(s); 161 162 stamp[0] = 'R'; stamp[1] = 'T'; stamp[2] = 'C'; stamp[3] = '\0'; 163 return 0; 164 } 165 166 /* 167 * Get the time of day, based on the clock's value and/or the base value. 168 */ 169 static int 170 dsclock_get(todr_chip_handle_t tch, struct clock_ymdhms *dt) 171 { 172 struct timekeeper_softc *sc = (void *)tch->cookie; 173 volatile u_int8_t *chiptime = (void *)sc->sc_clock; 174 int s; 175 176 s = splclock(); 177 /* update in progress; spin loop */ 178 while (chiptime[MC_REGA] & MC_REGA_UIP) 179 ; 180 dt->dt_sec = chiptime[MC_SEC]; 181 dt->dt_min = chiptime[MC_MIN]; 182 dt->dt_hour = chiptime[MC_HOUR]; 183 dt->dt_wday = chiptime[MC_DOW]; 184 dt->dt_day = chiptime[MC_DOM]; 185 dt->dt_mon = chiptime[MC_MONTH]; 186 dt->dt_year = chiptime[MC_YEAR] + YEAR0; 187 splx(s); 188 return 0; 189 } 190 191 /* 192 * Reset the TODR based on the time value. 193 */ 194 static int 195 dsclock_set(todr_chip_handle_t tch, struct clock_ymdhms *dt) 196 { 197 struct timekeeper_softc *sc = (void *)tch->cookie; 198 volatile u_int8_t *chiptime = (void *)sc->sc_clock; 199 int s; 200 201 s = splclock(); 202 chiptime[MC_REGB] |= MC_REGB_SET; /* enable write */ 203 chiptime[MC_SEC] = dt->dt_sec; 204 chiptime[MC_MIN] = dt->dt_min; 205 chiptime[MC_HOUR] = dt->dt_hour; 206 chiptime[MC_DOW] = dt->dt_wday; 207 chiptime[MC_DOM] = dt->dt_day; 208 chiptime[MC_MONTH] = dt->dt_mon; 209 chiptime[MC_YEAR] = dt->dt_year - YEAR0; 210 chiptime[MC_REGB] &= ~MC_REGB_SET; /* load them up */ 211 splx(s); 212 return 0; 213 } 214
Indexes created Mon Oct 13 08:09:50 GMT 2025