mcclock_mace.c revision 1.5
1 /* $NetBSD: mcclock_mace.c,v 1.5 2006/09/05 01:38:59 rumble Exp $ */ 2 3 /* 4 * Copyright (c) 2001 Antti Kantee. All Rights Reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by the NetBSD 17 * Foundation, Inc. and its contributors. 18 * 4. The name of the company nor the name of the author may be used to 19 * endorse or promote products derived from this software without specific 20 * prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY CAUASLITY LIMITED ``AS IS'' AND ANY EXPRESS 23 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 24 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 25 * DISCLAIMED. IN NO EVENT SHALL CAUSALITY LIMITED OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 28 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 /* 36 * Copyright (c) 1998 Mark Brinicombe. 37 * Copyright (c) 1998 Causality Limited. 38 * All rights reserved. 39 * 40 * Written by Mark Brinicombe, Causality Limited 41 * 42 * Redistribution and use in source and binary forms, with or without 43 * modification, are permitted provided that the following conditions 44 * are met: 45 * 1. Redistributions of source code must retain the above copyright 46 * notice, this list of conditions and the following disclaimer. 47 * 2. Redistributions in binary form must reproduce the above copyright 48 * notice, this list of conditions and the following disclaimer in the 49 * documentation and/or other materials provided with the distribution. 50 * 3. All advertising materials mentioning features or use of this software 51 * must display the following acknowledgement: 52 * This product includes software developed by Mark Brinicombe 53 * for the NetBSD Project. 54 * 4. The name of the company nor the name of the author may be used to 55 * endorse or promote products derived from this software without specific 56 * prior written permission. 57 * 58 * THIS SOFTWARE IS PROVIDED BY CAUASLITY LIMITED ``AS IS'' AND ANY EXPRESS 59 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 60 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 61 * DISCLAIMED. IN NO EVENT SHALL CAUSALITY LIMITED OR CONTRIBUTORS BE LIABLE 62 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 63 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 64 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 65 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 66 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 67 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 68 * SUCH DAMAGE. 69 */ 70 71 #include <sys/cdefs.h> 72 __KERNEL_RCSID(0, "$NetBSD: mcclock_mace.c,v 1.5 2006/09/05 01:38:59 rumble Exp $"); 73 74 #include <sys/param.h> 75 #include <sys/systm.h> 76 77 #include <machine/cpu.h> 78 #include <machine/autoconf.h> 79 #include <machine/bus.h> 80 #include <machine/machtype.h> 81 82 #include <dev/clock_subr.h> 83 #include <dev/ic/ds1687reg.h> 84 85 #include <sgimips/mace/macevar.h> 86 87 #include <sgimips/sgimips/clockvar.h> 88 89 struct mcclock_mace_softc { 90 struct device sc_dev; 91 92 struct todr_chip_handle sc_todrch; 93 94 bus_space_tag_t sc_st; 95 bus_space_handle_t sc_sh; 96 }; 97 98 static int mcclock_mace_match(struct device *, struct cfdata *, void *); 99 static void mcclock_mace_attach(struct device*, struct device *, void *); 100 101 static int mcclock_mace_gettime(struct todr_chip_handle *, 102 volatile struct timeval *); 103 static int mcclock_mace_settime(struct todr_chip_handle *, 104 volatile struct timeval *); 105 106 unsigned int ds1687_read(void *arg, unsigned int addr); 107 void ds1687_write(void *arg, unsigned int addr, unsigned int data); 108 109 CFATTACH_DECL(mcclock_mace, sizeof(struct mcclock_mace_softc), 110 mcclock_mace_match, mcclock_mace_attach, NULL, NULL); 111 112 static int 113 mcclock_mace_match(struct device *parent, struct cfdata *match, void *aux) 114 { 115 return 1; 116 } 117 118 void 119 mcclock_mace_attach(struct device *parent, struct device *self, void *aux) 120 { 121 struct mcclock_mace_softc *sc = (void *)self; 122 struct mace_attach_args *maa = aux; 123 124 sc->sc_st = maa->maa_st; 125 /* XXX should be bus_space_map() */ 126 if (bus_space_subregion(maa->maa_st, maa->maa_sh, 127 maa->maa_offset, 0, &sc->sc_sh)) 128 panic("mcclock_mace_attach: couldn't map"); 129 130 /* 131 * We want a fixed format: 24-hour, BCD data, so just force the 132 * RTC to this mode; if there was junk there we'll be able to 133 * fix things up later when we discover the time read back is 134 * no good. 135 */ 136 ds1687_write(sc, DS1687_CONTROLA, DS1687_DV1 | DS1687_BANK1); 137 ds1687_write(sc, DS1687_CONTROLB, DS1687_24HRS); 138 139 /* XXXrkb: init kickstart/wakeup stuff */ 140 141 if (!(ds1687_read(sc, DS1687_CONTROLD) & DS1687_VRT)) 142 printf(": lithium cell is dead, RTC unreliable"); 143 144 printf("\n"); 145 146 sc->sc_todrch.cookie = sc; 147 sc->sc_todrch.todr_gettime = mcclock_mace_gettime; 148 sc->sc_todrch.todr_settime = mcclock_mace_settime; 149 sc->sc_todrch.todr_setwen = NULL; 150 151 todr_attach(&sc->sc_todrch); 152 } 153 154 /* 155 * We need to use the following two functions from 156 * DS1687_PUT/GETTOD(). Hence the names. 157 */ 158 unsigned int 159 ds1687_read(void *arg, unsigned int addr) 160 { 161 struct mcclock_mace_softc *sc = (struct mcclock_mace_softc *)arg; 162 163 return (bus_space_read_1(sc->sc_st, sc->sc_sh, addr)); 164 } 165 166 void 167 ds1687_write(void *arg, unsigned int addr, unsigned int data) 168 { 169 struct mcclock_mace_softc *sc = (struct mcclock_mace_softc *)arg; 170 171 bus_space_write_1(sc->sc_st, sc->sc_sh, addr, data); 172 } 173 174 static int 175 mcclock_mace_gettime(struct todr_chip_handle *todrch, 176 volatile struct timeval *tv) 177 { 178 struct mcclock_mace_softc *sc = 179 (struct mcclock_mace_softc *)todrch->cookie; 180 struct clock_ymdhms dt; 181 ds1687_todregs regs; 182 int s; 183 184 s = splhigh(); 185 DS1687_GETTOD(sc, ®s); 186 splx(s); 187 188 dt.dt_sec = FROMBCD(regs[DS1687_SOFT_SEC]); 189 dt.dt_min = FROMBCD(regs[DS1687_SOFT_MIN]); 190 dt.dt_hour = FROMBCD(regs[DS1687_SOFT_HOUR]); 191 dt.dt_wday = FROMBCD(regs[DS1687_SOFT_DOW]); 192 dt.dt_day = FROMBCD(regs[DS1687_SOFT_DOM]); 193 dt.dt_mon = FROMBCD(regs[DS1687_SOFT_MONTH]); 194 dt.dt_year = FROMBCD(regs[DS1687_SOFT_YEAR]) + 195 (100 * FROMBCD(regs[DS1687_SOFT_CENTURY])); 196 197 /* simple sanity checks */ 198 if (dt.dt_mon > 12 || dt.dt_day > 31 || 199 dt.dt_hour >= 24 || dt.dt_min >= 60 || dt.dt_sec >= 60) 200 return (EIO); 201 202 tv->tv_sec = (long)clock_ymdhms_to_secs(&dt); 203 if (tv->tv_sec == -1) 204 return (ERANGE); 205 tv->tv_usec = 0; 206 207 return (0); 208 } 209 210 static int 211 mcclock_mace_settime(struct todr_chip_handle *todrch, 212 volatile struct timeval *tv) 213 { 214 struct mcclock_mace_softc *sc = 215 (struct mcclock_mace_softc *)todrch->cookie; 216 struct clock_ymdhms dt; 217 ds1687_todregs regs; 218 int s; 219 220 clock_secs_to_ymdhms((time_t)(tv->tv_sec + (tv->tv_usec > 500000)),&dt); 221 222 memset(®s, 0, sizeof(regs)); 223 224 regs[DS1687_SOFT_SEC] = TOBCD(dt.dt_sec); 225 regs[DS1687_SOFT_MIN] = TOBCD(dt.dt_min); 226 regs[DS1687_SOFT_HOUR] = TOBCD(dt.dt_hour); 227 regs[DS1687_SOFT_DOW] = TOBCD(dt.dt_wday); 228 regs[DS1687_SOFT_DOM] = TOBCD(dt.dt_day); 229 regs[DS1687_SOFT_MONTH] = TOBCD(dt.dt_mon); 230 regs[DS1687_SOFT_YEAR] = TOBCD(dt.dt_year % 100); 231 regs[DS1687_SOFT_CENTURY] = TOBCD(dt.dt_year / 100); 232 s = splhigh(); 233 DS1687_PUTTOD(sc, ®s); 234 splx(s); 235 236 return (0); 237 } 238
Indexes created Mon Sep 29 21:09:56 GMT 2025