timekeeper.c revision 1.10.12.1
1 /* $NetBSD: timekeeper.c,v 1.10.12.1 2013/02/25 00:28:47 tls 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 1.10.12.1 2013/02/25 00:28:47 tls 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 #include "ioconf.h" 48 49 #define YEAR0 1970 /* year offset */ 50 51 struct timekeeper_softc { 52 device_t sc_dev; 53 void *sc_clock, *sc_nvram; 54 int sc_nvramsize; 55 uint8_t sc_image[2040]; 56 struct todr_chip_handle sc_todr; 57 }; 58 59 static int clock_match(device_t, cfdata_t, void *); 60 static void clock_attach(device_t, device_t, void *); 61 62 CFATTACH_DECL_NEW(clock, sizeof (struct timekeeper_softc), 63 clock_match, clock_attach, NULL, NULL); 64 65 static int mkclock_get(todr_chip_handle_t, struct clock_ymdhms *); 66 static int mkclock_set(todr_chip_handle_t, struct clock_ymdhms *); 67 static int dsclock_get(todr_chip_handle_t, struct clock_ymdhms *); 68 static int dsclock_set(todr_chip_handle_t, struct clock_ymdhms *); 69 70 static int 71 clock_match(device_t parent, cfdata_t cf, void *aux) 72 { 73 struct mainbus_attach_args *ma = aux; 74 75 if (strcmp(ma->ma_name, clock_cd.cd_name)) 76 return 0; 77 return 1; 78 } 79 80 static void 81 clock_attach(device_t parent, device_t self, void *aux) 82 { 83 struct timekeeper_softc *sc = device_private(self); 84 struct mainbus_attach_args *ma = aux; 85 86 sc->sc_dev = self; 87 88 switch (machtype) { 89 default: 90 case LUNA_I: /* Mostek MK48T02 */ 91 sc->sc_clock = (void *)(ma->ma_addr + 2040); 92 sc->sc_nvram = (void *)ma->ma_addr; 93 sc->sc_nvramsize = 2040; 94 sc->sc_todr.todr_gettime_ymdhms = mkclock_get; 95 sc->sc_todr.todr_settime_ymdhms = mkclock_set; 96 sc->sc_todr.cookie = sc; 97 aprint_normal(": mk48t02\n"); 98 break; 99 case LUNA_II: /* Dallas DS1287A */ 100 sc->sc_clock = (void *)ma->ma_addr; 101 sc->sc_nvram = (void *)(ma->ma_addr + MC_NREGS); 102 sc->sc_nvramsize = 50; 103 sc->sc_todr.todr_gettime_ymdhms = dsclock_get; 104 sc->sc_todr.todr_settime_ymdhms = dsclock_set; 105 sc->sc_todr.cookie = sc; 106 aprint_normal(": ds1287a\n"); 107 break; 108 } 109 todr_attach(&sc->sc_todr); 110 memcpy(sc->sc_image, sc->sc_nvram, sc->sc_nvramsize); 111 } 112 113 /* 114 * Get the time of day, based on the clock's value and/or the base value. 115 */ 116 static int 117 mkclock_get(todr_chip_handle_t tch, struct clock_ymdhms *dt) 118 { 119 struct timekeeper_softc *sc = (void *)tch->cookie; 120 volatile uint8_t *chiptime = (void *)sc->sc_clock; 121 int s; 122 123 s = splclock(); 124 chiptime[MK_CSR] |= MK_CSR_READ; /* enable read (stop time) */ 125 dt->dt_sec = FROMBCD(chiptime[MK_SEC]); 126 dt->dt_min = FROMBCD(chiptime[MK_MIN]); 127 dt->dt_hour = FROMBCD(chiptime[MK_HOUR]); 128 dt->dt_wday = FROMBCD(chiptime[MK_DOW]); 129 dt->dt_day = FROMBCD(chiptime[MK_DOM]); 130 dt->dt_mon = FROMBCD(chiptime[MK_MONTH]); 131 dt->dt_year = FROMBCD(chiptime[MK_YEAR]) + YEAR0; 132 chiptime[MK_CSR] &= ~MK_CSR_READ; /* time wears on */ 133 splx(s); 134 return 0; 135 } 136 137 /* 138 * Reset the TODR based on the time value. 139 */ 140 static int 141 mkclock_set(todr_chip_handle_t tch, struct clock_ymdhms *dt) 142 { 143 struct timekeeper_softc *sc = (void *)tch->cookie; 144 volatile uint8_t *chiptime = (void *)sc->sc_clock; 145 volatile uint8_t *stamp = (uint8_t *)sc->sc_nvram + 0x10; 146 int s; 147 148 s = splclock(); 149 chiptime[MK_CSR] |= MK_CSR_WRITE; /* enable write */ 150 chiptime[MK_SEC] = TOBCD(dt->dt_sec); 151 chiptime[MK_MIN] = TOBCD(dt->dt_min); 152 chiptime[MK_HOUR] = TOBCD(dt->dt_hour); 153 chiptime[MK_DOW] = TOBCD(dt->dt_wday); 154 chiptime[MK_DOM] = TOBCD(dt->dt_day); 155 chiptime[MK_MONTH] = TOBCD(dt->dt_mon); 156 chiptime[MK_YEAR] = TOBCD(dt->dt_year - YEAR0); 157 chiptime[MK_CSR] &= ~MK_CSR_WRITE; /* load them up */ 158 splx(s); 159 160 stamp[0] = 'R'; stamp[1] = 'T'; stamp[2] = 'C'; stamp[3] = '\0'; 161 return 0; 162 } 163 164 /* 165 * Get the time of day, based on the clock's value and/or the base value. 166 */ 167 static int 168 dsclock_get(todr_chip_handle_t tch, struct clock_ymdhms *dt) 169 { 170 struct timekeeper_softc *sc = (void *)tch->cookie; 171 volatile uint8_t *chiptime = (void *)sc->sc_clock; 172 int s; 173 174 s = splclock(); 175 /* update in progress; spin loop */ 176 while (chiptime[MC_REGA] & MC_REGA_UIP) 177 continue; 178 dt->dt_sec = chiptime[MC_SEC]; 179 dt->dt_min = chiptime[MC_MIN]; 180 dt->dt_hour = chiptime[MC_HOUR]; 181 dt->dt_wday = chiptime[MC_DOW]; 182 dt->dt_day = chiptime[MC_DOM]; 183 dt->dt_mon = chiptime[MC_MONTH]; 184 dt->dt_year = chiptime[MC_YEAR] + YEAR0; 185 splx(s); 186 return 0; 187 } 188 189 /* 190 * Reset the TODR based on the time value. 191 */ 192 static int 193 dsclock_set(todr_chip_handle_t tch, struct clock_ymdhms *dt) 194 { 195 struct timekeeper_softc *sc = (void *)tch->cookie; 196 volatile uint8_t *chiptime = (void *)sc->sc_clock; 197 int s; 198 199 s = splclock(); 200 chiptime[MC_REGB] |= MC_REGB_SET; /* enable write */ 201 chiptime[MC_SEC] = dt->dt_sec; 202 chiptime[MC_MIN] = dt->dt_min; 203 chiptime[MC_HOUR] = dt->dt_hour; 204 chiptime[MC_DOW] = dt->dt_wday; 205 chiptime[MC_DOM] = dt->dt_day; 206 chiptime[MC_MONTH] = dt->dt_mon; 207 chiptime[MC_YEAR] = dt->dt_year - YEAR0; 208 chiptime[MC_REGB] &= ~MC_REGB_SET; /* load them up */ 209 splx(s); 210 return 0; 211 } 212
Indexes created Mon Oct 13 08:09:50 GMT 2025