mcclock_mace.c revision 1.10
1 /* $NetBSD: mcclock_mace.c,v 1.10 2009/04/03 15:41:14 uebayasi 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 1.10 2009/04/03 15:41:14 uebayasi Exp $"); 69 70 #include <sys/param.h> 71 #include <sys/systm.h> 72 #include <sys/device.h> 73 74 #include <machine/cpu.h> 75 #include <machine/autoconf.h> 76 #include <machine/bus.h> 77 #include <machine/machtype.h> 78 79 #include <dev/clock_subr.h> 80 #include <dev/ic/ds1687reg.h> 81 82 #include <sgimips/mace/macevar.h> 83 84 #include <sgimips/sgimips/clockvar.h> 85 86 struct mcclock_mace_softc { 87 struct device sc_dev; 88 89 struct todr_chip_handle sc_todrch; 90 91 bus_space_tag_t sc_st; 92 bus_space_handle_t sc_sh; 93 }; 94 95 static struct mcclock_mace_softc *mace0 = NULL; 96 97 static int mcclock_mace_match(struct device *, struct cfdata *, void *); 98 static void mcclock_mace_attach(struct device*, struct device *, void *); 99 100 static int mcclock_mace_gettime(struct todr_chip_handle *, 101 volatile struct timeval *); 102 static int mcclock_mace_settime(struct todr_chip_handle *, 103 volatile struct timeval *); 104 105 unsigned int ds1687_read(void *arg, unsigned int addr); 106 void ds1687_write(void *arg, unsigned int addr, unsigned int data); 107 108 void mcclock_poweroff(void); 109 110 111 CFATTACH_DECL(mcclock_mace, sizeof(struct mcclock_mace_softc), 112 mcclock_mace_match, mcclock_mace_attach, NULL, NULL); 113 114 static int 115 mcclock_mace_match(struct device *parent, struct cfdata *match, void *aux) 116 { 117 return 1; 118 } 119 120 void 121 mcclock_mace_attach(struct device *parent, struct device *self, void *aux) 122 { 123 struct mcclock_mace_softc *sc = (void *)self; 124 struct mace_attach_args *maa = aux; 125 126 sc->sc_st = maa->maa_st; 127 /* XXX should be bus_space_map() */ 128 if (bus_space_subregion(maa->maa_st, maa->maa_sh, 129 maa->maa_offset, 0, &sc->sc_sh)) 130 panic("mcclock_mace_attach: couldn't map"); 131 132 /* 133 * We want a fixed format: 24-hour, BCD data, so just force the 134 * RTC to this mode; if there was junk there we'll be able to 135 * fix things up later when we discover the time read back is 136 * no good. 137 */ 138 ds1687_write(sc, DS1687_CONTROLA, DS1687_DV1 | DS1687_BANK1); 139 ds1687_write(sc, DS1687_CONTROLB, DS1687_24HRS); 140 141 /* XXXrkb: init kickstart/wakeup stuff */ 142 143 if (!(ds1687_read(sc, DS1687_CONTROLD) & DS1687_VRT)) 144 printf(": lithium cell is dead, RTC unreliable"); 145 146 printf("\n"); 147 148 sc->sc_todrch.cookie = sc; 149 sc->sc_todrch.todr_gettime = mcclock_mace_gettime; 150 sc->sc_todrch.todr_settime = mcclock_mace_settime; 151 sc->sc_todrch.todr_setwen = NULL; 152 153 todr_attach(&sc->sc_todrch); 154 mace0 = sc; 155 } 156 157 /* 158 * We need to use the following two functions from 159 * DS1687_PUT/GETTOD(). Hence the names. 160 */ 161 unsigned int 162 ds1687_read(void *arg, unsigned int addr) 163 { 164 struct mcclock_mace_softc *sc = (struct mcclock_mace_softc *)arg; 165 166 return (bus_space_read_1(sc->sc_st, sc->sc_sh, addr)); 167 } 168 169 void 170 ds1687_write(void *arg, unsigned int addr, unsigned int data) 171 { 172 struct mcclock_mace_softc *sc = (struct mcclock_mace_softc *)arg; 173 174 bus_space_write_1(sc->sc_st, sc->sc_sh, addr, data); 175 } 176 177 static int 178 mcclock_mace_gettime(struct todr_chip_handle *todrch, 179 volatile struct timeval *tv) 180 { 181 struct mcclock_mace_softc *sc = 182 (struct mcclock_mace_softc *)todrch->cookie; 183 struct clock_ymdhms dt; 184 ds1687_todregs regs; 185 int s; 186 187 s = splhigh(); 188 DS1687_GETTOD(sc, ®s); 189 splx(s); 190 191 dt.dt_sec = FROMBCD(regs[DS1687_SOFT_SEC]); 192 dt.dt_min = FROMBCD(regs[DS1687_SOFT_MIN]); 193 dt.dt_hour = FROMBCD(regs[DS1687_SOFT_HOUR]); 194 dt.dt_wday = FROMBCD(regs[DS1687_SOFT_DOW]); 195 dt.dt_day = FROMBCD(regs[DS1687_SOFT_DOM]); 196 dt.dt_mon = FROMBCD(regs[DS1687_SOFT_MONTH]); 197 dt.dt_year = FROMBCD(regs[DS1687_SOFT_YEAR]) + 198 (100 * FROMBCD(regs[DS1687_SOFT_CENTURY])); 199 200 /* simple sanity checks */ 201 if (dt.dt_mon > 12 || dt.dt_day > 31 || 202 dt.dt_hour >= 24 || dt.dt_min >= 60 || dt.dt_sec >= 60) 203 return (EIO); 204 205 tv->tv_sec = (long)clock_ymdhms_to_secs(&dt); 206 if (tv->tv_sec == -1) 207 return (ERANGE); 208 tv->tv_usec = 0; 209 210 return (0); 211 } 212 213 static int 214 mcclock_mace_settime(struct todr_chip_handle *todrch, 215 volatile struct timeval *tv) 216 { 217 struct mcclock_mace_softc *sc = 218 (struct mcclock_mace_softc *)todrch->cookie; 219 struct clock_ymdhms dt; 220 ds1687_todregs regs; 221 int s; 222 223 clock_secs_to_ymdhms((time_t)(tv->tv_sec + (tv->tv_usec > 500000)),&dt); 224 225 memset(®s, 0, sizeof(regs)); 226 227 regs[DS1687_SOFT_SEC] = TOBCD(dt.dt_sec); 228 regs[DS1687_SOFT_MIN] = TOBCD(dt.dt_min); 229 regs[DS1687_SOFT_HOUR] = TOBCD(dt.dt_hour); 230 regs[DS1687_SOFT_DOW] = TOBCD(dt.dt_wday); 231 regs[DS1687_SOFT_DOM] = TOBCD(dt.dt_day); 232 regs[DS1687_SOFT_MONTH] = TOBCD(dt.dt_mon); 233 regs[DS1687_SOFT_YEAR] = TOBCD(dt.dt_year % 100); 234 regs[DS1687_SOFT_CENTURY] = TOBCD(dt.dt_year / 100); 235 s = splhigh(); 236 DS1687_PUTTOD(sc, ®s); 237 splx(s); 238 239 return (0); 240 } 241 242 void 243 mcclock_poweroff(void) 244 { 245 int s; 246 uint8_t a, xctl_a, xctl_b; 247 248 if (mace0 == NULL) 249 return; 250 251 s = splhigh(); 252 a = ds1687_read(mace0, DS1687_CONTROLA); 253 a &= ~DS1687_DV2; 254 a |= DS1687_DV1; 255 ds1687_write(mace0, DS1687_CONTROLA, a | DS1687_BANK1); 256 wbflush(); 257 258 xctl_b = ds1687_read(mace0, DS1687_BANK1_XCTRL4B); 259 xctl_b |= DS1687_X4B_ABE | DS1687_X4B_KIE; 260 ds1687_write(mace0, DS1687_BANK1_XCTRL4B, xctl_b); 261 262 xctl_a = ds1687_read(mace0, DS1687_BANK1_XCTRL4A); 263 xctl_a &= ~(DS1687_X4A_RCF | DS1687_X4A_WAF | DS1687_X4A_KF); 264 ds1687_write(mace0, DS1687_BANK1_XCTRL4A, xctl_a); 265 wbflush(); 266 267 /* and down we go */ 268 ds1687_write(mace0, DS1687_BANK1_XCTRL4A, xctl_a | DS1687_X4A_PAB); 269 ds1687_write(mace0, DS1687_CONTROLA, a); 270 wbflush(); 271 while(1); 272 } 273
Indexes created Tue Sep 30 11:09:46 GMT 2025