mcclock_mace.c revision 1.7
1 /* $NetBSD: mcclock_mace.c,v 1.7 2007/09/26 05:50:02 macallan 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. The name of the company nor the name of the author may be used to 15 * endorse or promote products derived from this software without specific 16 * prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY CAUASLITY LIMITED ``AS IS'' AND ANY EXPRESS 19 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 20 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 21 * DISCLAIMED. IN NO EVENT SHALL CAUSALITY LIMITED OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 /* 32 * Copyright (c) 1998 Mark Brinicombe. 33 * Copyright (c) 1998 Causality Limited. 34 * All rights reserved. 35 * 36 * Written by Mark Brinicombe, Causality Limited 37 * 38 * Redistribution and use in source and binary forms, with or without 39 * modification, are permitted provided that the following conditions 40 * are met: 41 * 1. Redistributions of source code must retain the above copyright 42 * notice, this list of conditions and the following disclaimer. 43 * 2. Redistributions in binary form must reproduce the above copyright 44 * notice, this list of conditions and the following disclaimer in the 45 * documentation and/or other materials provided with the distribution. 46 * 3. All advertising materials mentioning features or use of this software 47 * must display the following acknowledgement: 48 * This product includes software developed by Mark Brinicombe 49 * for the NetBSD Project. 50 * 4. The name of the company nor the name of the author may be used to 51 * endorse or promote products derived from this software without specific 52 * prior written permission. 53 * 54 * THIS SOFTWARE IS PROVIDED BY CAUASLITY LIMITED ``AS IS'' AND ANY EXPRESS 55 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 56 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 57 * DISCLAIMED. IN NO EVENT SHALL CAUSALITY LIMITED OR CONTRIBUTORS BE LIABLE 58 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 59 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 60 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 61 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 62 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 63 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 64 * SUCH DAMAGE. 65 */ 66 67 #include <sys/cdefs.h> 68 __KERNEL_RCSID(0, "$NetBSD: mcclock_mace.c,v 1.7 2007/09/26 05:50:02 macallan Exp $"); 69 70 #include <sys/param.h> 71 #include <sys/systm.h> 72 73 #include <machine/cpu.h> 74 #include <machine/autoconf.h> 75 #include <machine/bus.h> 76 #include <machine/machtype.h> 77 78 #include <dev/clock_subr.h> 79 #include <dev/ic/ds1687reg.h> 80 81 #include <sgimips/mace/macevar.h> 82 83 #include <sgimips/sgimips/clockvar.h> 84 85 struct mcclock_mace_softc { 86 struct device sc_dev; 87 88 struct todr_chip_handle sc_todrch; 89 90 bus_space_tag_t sc_st; 91 bus_space_handle_t sc_sh; 92 }; 93 94 static struct mcclock_mace_softc *mace0 = NULL; 95 96 static int mcclock_mace_match(struct device *, struct cfdata *, void *); 97 static void mcclock_mace_attach(struct device*, struct device *, void *); 98 99 static int mcclock_mace_gettime(struct todr_chip_handle *, 100 volatile struct timeval *); 101 static int mcclock_mace_settime(struct todr_chip_handle *, 102 volatile struct timeval *); 103 104 unsigned int ds1687_read(void *arg, unsigned int addr); 105 void ds1687_write(void *arg, unsigned int addr, unsigned int data); 106 107 void mcclock_poweroff(void); 108 109 110 CFATTACH_DECL(mcclock_mace, sizeof(struct mcclock_mace_softc), 111 mcclock_mace_match, mcclock_mace_attach, NULL, NULL); 112 113 static int 114 mcclock_mace_match(struct device *parent, struct cfdata *match, void *aux) 115 { 116 return 1; 117 } 118 119 void 120 mcclock_mace_attach(struct device *parent, struct device *self, void *aux) 121 { 122 struct mcclock_mace_softc *sc = (void *)self; 123 struct mace_attach_args *maa = aux; 124 125 sc->sc_st = maa->maa_st; 126 /* XXX should be bus_space_map() */ 127 if (bus_space_subregion(maa->maa_st, maa->maa_sh, 128 maa->maa_offset, 0, &sc->sc_sh)) 129 panic("mcclock_mace_attach: couldn't map"); 130 131 /* 132 * We want a fixed format: 24-hour, BCD data, so just force the 133 * RTC to this mode; if there was junk there we'll be able to 134 * fix things up later when we discover the time read back is 135 * no good. 136 */ 137 ds1687_write(sc, DS1687_CONTROLA, DS1687_DV1 | DS1687_BANK1); 138 ds1687_write(sc, DS1687_CONTROLB, DS1687_24HRS); 139 140 /* XXXrkb: init kickstart/wakeup stuff */ 141 142 if (!(ds1687_read(sc, DS1687_CONTROLD) & DS1687_VRT)) 143 printf(": lithium cell is dead, RTC unreliable"); 144 145 printf("\n"); 146 147 sc->sc_todrch.cookie = sc; 148 sc->sc_todrch.todr_gettime = mcclock_mace_gettime; 149 sc->sc_todrch.todr_settime = mcclock_mace_settime; 150 sc->sc_todrch.todr_setwen = NULL; 151 152 todr_attach(&sc->sc_todrch); 153 mace0 = sc; 154 } 155 156 /* 157 * We need to use the following two functions from 158 * DS1687_PUT/GETTOD(). Hence the names. 159 */ 160 unsigned int 161 ds1687_read(void *arg, unsigned int addr) 162 { 163 struct mcclock_mace_softc *sc = (struct mcclock_mace_softc *)arg; 164 165 return (bus_space_read_1(sc->sc_st, sc->sc_sh, addr)); 166 } 167 168 void 169 ds1687_write(void *arg, unsigned int addr, unsigned int data) 170 { 171 struct mcclock_mace_softc *sc = (struct mcclock_mace_softc *)arg; 172 173 bus_space_write_1(sc->sc_st, sc->sc_sh, addr, data); 174 } 175 176 static int 177 mcclock_mace_gettime(struct todr_chip_handle *todrch, 178 volatile struct timeval *tv) 179 { 180 struct mcclock_mace_softc *sc = 181 (struct mcclock_mace_softc *)todrch->cookie; 182 struct clock_ymdhms dt; 183 ds1687_todregs regs; 184 int s; 185 186 s = splhigh(); 187 DS1687_GETTOD(sc, ®s); 188 splx(s); 189 190 dt.dt_sec = FROMBCD(regs[DS1687_SOFT_SEC]); 191 dt.dt_min = FROMBCD(regs[DS1687_SOFT_MIN]); 192 dt.dt_hour = FROMBCD(regs[DS1687_SOFT_HOUR]); 193 dt.dt_wday = FROMBCD(regs[DS1687_SOFT_DOW]); 194 dt.dt_day = FROMBCD(regs[DS1687_SOFT_DOM]); 195 dt.dt_mon = FROMBCD(regs[DS1687_SOFT_MONTH]); 196 dt.dt_year = FROMBCD(regs[DS1687_SOFT_YEAR]) + 197 (100 * FROMBCD(regs[DS1687_SOFT_CENTURY])); 198 199 /* simple sanity checks */ 200 if (dt.dt_mon > 12 || dt.dt_day > 31 || 201 dt.dt_hour >= 24 || dt.dt_min >= 60 || dt.dt_sec >= 60) 202 return (EIO); 203 204 tv->tv_sec = (long)clock_ymdhms_to_secs(&dt); 205 if (tv->tv_sec == -1) 206 return (ERANGE); 207 tv->tv_usec = 0; 208 209 return (0); 210 } 211 212 static int 213 mcclock_mace_settime(struct todr_chip_handle *todrch, 214 volatile struct timeval *tv) 215 { 216 struct mcclock_mace_softc *sc = 217 (struct mcclock_mace_softc *)todrch->cookie; 218 struct clock_ymdhms dt; 219 ds1687_todregs regs; 220 int s; 221 222 clock_secs_to_ymdhms((time_t)(tv->tv_sec + (tv->tv_usec > 500000)),&dt); 223 224 memset(®s, 0, sizeof(regs)); 225 226 regs[DS1687_SOFT_SEC] = TOBCD(dt.dt_sec); 227 regs[DS1687_SOFT_MIN] = TOBCD(dt.dt_min); 228 regs[DS1687_SOFT_HOUR] = TOBCD(dt.dt_hour); 229 regs[DS1687_SOFT_DOW] = TOBCD(dt.dt_wday); 230 regs[DS1687_SOFT_DOM] = TOBCD(dt.dt_day); 231 regs[DS1687_SOFT_MONTH] = TOBCD(dt.dt_mon); 232 regs[DS1687_SOFT_YEAR] = TOBCD(dt.dt_year % 100); 233 regs[DS1687_SOFT_CENTURY] = TOBCD(dt.dt_year / 100); 234 s = splhigh(); 235 DS1687_PUTTOD(sc, ®s); 236 splx(s); 237 238 return (0); 239 } 240 241 void 242 mcclock_poweroff() 243 { 244 int s; 245 uint8_t a, xctl_a, xctl_b; 246 247 if (mace0 == NULL) 248 return; 249 250 s = splhigh(); 251 a = ds1687_read(mace0, DS1687_CONTROLA); 252 a &= ~DS1687_DV2; 253 a |= DS1687_DV1; 254 ds1687_write(mace0, DS1687_CONTROLA, a | DS1687_BANK1); 255 wbflush(); 256 257 xctl_b = ds1687_read(mace0, DS1687_BANK1_XCTRL4B); 258 xctl_b |= DS1687_X4B_ABE | DS1687_X4B_KIE; 259 ds1687_write(mace0, DS1687_BANK1_XCTRL4B, xctl_b); 260 261 xctl_a = ds1687_read(mace0, DS1687_BANK1_XCTRL4A); 262 xctl_a &= ~(DS1687_X4A_RCF | DS1687_X4A_WAF | DS1687_X4A_KF); 263 ds1687_write(mace0, DS1687_BANK1_XCTRL4A, xctl_a); 264 wbflush(); 265 266 /* and down we go */ 267 ds1687_write(mace0, DS1687_BANK1_XCTRL4A, xctl_a | DS1687_X4A_PAB); 268 ds1687_write(mace0, DS1687_CONTROLA, a); 269 wbflush(); 270 while(1); 271 } 272
Indexes created Mon Sep 29 03:10:08 GMT 2025