timekeeper.c revision 1.7
1 /* $NetBSD: timekeeper.c,v 1.7 2009/03/14 15:36:08 dsl 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 1.7 2009/03/14 15:36:08 dsl 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(struct device *, struct cfdata *, void *); 58 static void clock_attach(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(todr_chip_handle_t, struct clock_ymdhms *); 65 static int mkclock_set(todr_chip_handle_t, struct clock_ymdhms *); 66 static int dsclock_get(todr_chip_handle_t, struct clock_ymdhms *); 67 static int dsclock_set(todr_chip_handle_t, struct clock_ymdhms *); 68 69 static int 70 clock_match(struct device *parent, struct cfdata *match, void *aux) 71 { 72 struct mainbus_attach_args *ma = aux; 73 74 if (strcmp(ma->ma_name, clock_cd.cd_name)) 75 return 0; 76 return 1; 77 } 78 79 static void 80 clock_attach(parent, self, aux) 81 struct device *parent, *self; 82 void *aux; 83 { 84 struct timekeeper_softc *sc = (void *)self; 85 struct mainbus_attach_args *ma = aux; 86 87 switch (machtype) { 88 default: 89 case LUNA_I: /* Mostek MK48T02 */ 90 sc->sc_clock = (void *)(ma->ma_addr + 2040); 91 sc->sc_nvram = (void *)ma->ma_addr; 92 sc->sc_nvramsize = 2040; 93 sc->sc_todr.todr_gettime_ymdhms = mkclock_get; 94 sc->sc_todr.todr_settime_ymdhms = mkclock_set; 95 sc->sc_todr.cookie = sc; 96 printf(": mk48t02\n"); 97 break; 98 case LUNA_II: /* Dallas DS1287A */ 99 sc->sc_clock = (void *)ma->ma_addr; 100 sc->sc_nvram = (void *)(ma->ma_addr + 50); 101 sc->sc_nvramsize = 50; 102 sc->sc_todr.todr_gettime_ymdhms = dsclock_get; 103 sc->sc_todr.todr_settime_ymdhms = dsclock_set; 104 sc->sc_todr.cookie = sc; 105 printf(": ds1287a\n"); 106 break; 107 } 108 todr_attach(&sc->sc_todr); 109 memcpy(sc->sc_image, sc->sc_nvram, sc->sc_nvramsize); 110 } 111 112 /* 113 * Get the time of day, based on the clock's value and/or the base value. 114 */ 115 static int 116 mkclock_get(todr_chip_handle_t tch, struct clock_ymdhms *dt) 117 { 118 struct timekeeper_softc *sc = (void *)tch->cookie; 119 volatile u_int8_t *chiptime = (void *)sc->sc_clock; 120 int s; 121 122 s = splclock(); 123 chiptime[MK_CSR] |= MK_CSR_READ; /* enable read (stop time) */ 124 dt->dt_sec = FROMBCD(chiptime[MK_SEC]); 125 dt->dt_min = FROMBCD(chiptime[MK_MIN]); 126 dt->dt_hour = FROMBCD(chiptime[MK_HOUR]); 127 dt->dt_wday = FROMBCD(chiptime[MK_DOW]); 128 dt->dt_day = FROMBCD(chiptime[MK_DOM]); 129 dt->dt_mon = FROMBCD(chiptime[MK_MONTH]); 130 dt->dt_year = FROMBCD(chiptime[MK_YEAR]) + YEAR0; 131 chiptime[MK_CSR] &= ~MK_CSR_READ; /* time wears on */ 132 splx(s); 133 return 0; 134 } 135 136 /* 137 * Reset the TODR based on the time value. 138 */ 139 static int 140 mkclock_set(todr_chip_handle_t tch, struct clock_ymdhms *dt) 141 { 142 struct timekeeper_softc *sc = (void *)tch->cookie; 143 volatile u_int8_t *chiptime = (void *)sc->sc_clock; 144 volatile u_int8_t *stamp = (u_int8_t *)sc->sc_nvram + 0x10; 145 int s; 146 147 s = splclock(); 148 chiptime[MK_CSR] |= MK_CSR_WRITE; /* enable write */ 149 chiptime[MK_SEC] = TOBCD(dt->dt_sec); 150 chiptime[MK_MIN] = TOBCD(dt->dt_min); 151 chiptime[MK_HOUR] = TOBCD(dt->dt_hour); 152 chiptime[MK_DOW] = TOBCD(dt->dt_wday); 153 chiptime[MK_DOM] = TOBCD(dt->dt_day); 154 chiptime[MK_MONTH] = TOBCD(dt->dt_mon); 155 chiptime[MK_YEAR] = TOBCD(dt->dt_year - YEAR0); 156 chiptime[MK_CSR] &= ~MK_CSR_WRITE; /* load them up */ 157 splx(s); 158 159 stamp[0] = 'R'; stamp[1] = 'T'; stamp[2] = 'C'; stamp[3] = '\0'; 160 return 0; 161 } 162 163 /* 164 * Get the time of day, based on the clock's value and/or the base value. 165 */ 166 static int 167 dsclock_get(todr_chip_handle_t tch, struct clock_ymdhms *dt) 168 { 169 struct timekeeper_softc *sc = (void *)tch->cookie; 170 volatile u_int8_t *chiptime = (void *)sc->sc_clock; 171 int s; 172 173 s = splclock(); 174 /* update in progress; spin loop */ 175 while (chiptime[MC_REGA] & MC_REGA_UIP) 176 ; 177 dt->dt_sec = chiptime[MC_SEC]; 178 dt->dt_min = chiptime[MC_MIN]; 179 dt->dt_hour = chiptime[MC_HOUR]; 180 dt->dt_wday = chiptime[MC_DOW]; 181 dt->dt_day = chiptime[MC_DOM]; 182 dt->dt_mon = chiptime[MC_MONTH]; 183 dt->dt_year = chiptime[MC_YEAR] + YEAR0; 184 splx(s); 185 return 0; 186 } 187 188 /* 189 * Reset the TODR based on the time value. 190 */ 191 static int 192 dsclock_set(todr_chip_handle_t tch, struct clock_ymdhms *dt) 193 { 194 struct timekeeper_softc *sc = (void *)tch->cookie; 195 volatile u_int8_t *chiptime = (void *)sc->sc_clock; 196 int s; 197 198 s = splclock(); 199 chiptime[MC_REGB] |= MC_REGB_SET; /* enable write */ 200 chiptime[MC_SEC] = dt->dt_sec; 201 chiptime[MC_MIN] = dt->dt_min; 202 chiptime[MC_HOUR] = dt->dt_hour; 203 chiptime[MC_DOW] = dt->dt_wday; 204 chiptime[MC_DOM] = dt->dt_day; 205 chiptime[MC_MONTH] = dt->dt_mon; 206 chiptime[MC_YEAR] = dt->dt_year - YEAR0; 207 chiptime[MC_REGB] &= ~MC_REGB_SET; /* load them up */ 208 splx(s); 209 return 0; 210 } 211
Indexes created Tue Oct 14 11:09:46 GMT 2025