mcclock_mace.c revision 1.19
1 /* $NetBSD: mcclock_mace.c,v 1.19 2025/09/07 21:45:14 thorpej 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 1.19 2025/09/07 21:45:14 thorpej 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 <sys/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 device_t 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(device_t, cfdata_t, void *); 98 static void mcclock_mace_attach(device_t, device_t, void *); 99 100 static int mcclock_mace_gettime_ymdhms(todr_chip_handle_t, 101 struct clock_ymdhms *); 102 static int mcclock_mace_settime_ymdhms(todr_chip_handle_t, 103 struct clock_ymdhms *); 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_NEW(mcclock_mace, sizeof(struct mcclock_mace_softc), 112 mcclock_mace_match, mcclock_mace_attach, NULL, NULL); 113 114 static int 115 mcclock_mace_match(device_t parent, cfdata_t cf, void *aux) 116 { 117 118 return 1; 119 } 120 121 void 122 mcclock_mace_attach(device_t parent, device_t self, void *aux) 123 { 124 struct mcclock_mace_softc *sc = device_private(self); 125 struct mace_attach_args *maa = aux; 126 127 sc->sc_dev = self; 128 sc->sc_st = maa->maa_st; 129 /* XXX should be bus_space_map() */ 130 if (bus_space_subregion(maa->maa_st, maa->maa_sh, 131 maa->maa_offset, 0, &sc->sc_sh)) 132 panic("mcclock_mace_attach: couldn't map"); 133 134 /* 135 * We want a fixed format: 24-hour, BCD data, so just force the 136 * RTC to this mode; if there was junk there we'll be able to 137 * fix things up later when we discover the time read back is 138 * no good. 139 */ 140 ds1687_write(sc, DS1687_CONTROLA, DS1687_DV1 | DS1687_BANK1); 141 ds1687_write(sc, DS1687_CONTROLB, DS1687_24HRS); 142 143 /* XXXrkb: init kickstart/wakeup stuff */ 144 145 if (!(ds1687_read(sc, DS1687_CONTROLD) & DS1687_VRT)) 146 printf(": lithium cell is dead, RTC unreliable"); 147 148 printf("\n"); 149 150 sc->sc_todrch.todr_dev = self; 151 sc->sc_todrch.todr_gettime_ymdhms = mcclock_mace_gettime_ymdhms; 152 sc->sc_todrch.todr_settime_ymdhms = mcclock_mace_settime_ymdhms; 153 154 todr_attach(&sc->sc_todrch); 155 mace0 = sc; 156 } 157 158 /* 159 * We need to use the following two functions from 160 * DS1687_PUT/GETTOD(). Hence the names. 161 */ 162 unsigned int 163 ds1687_read(void *arg, unsigned int addr) 164 { 165 struct mcclock_mace_softc *sc = arg; 166 167 return bus_space_read_1(sc->sc_st, sc->sc_sh, (addr << 8) + 7); 168 } 169 170 void 171 ds1687_write(void *arg, unsigned int addr, unsigned int data) 172 { 173 struct mcclock_mace_softc *sc = arg; 174 175 bus_space_write_1(sc->sc_st, sc->sc_sh, (addr << 8) + 7, data); 176 } 177 178 static int 179 mcclock_mace_gettime_ymdhms(todr_chip_handle_t todrch, struct clock_ymdhms *dt) 180 { 181 struct mcclock_mace_softc *sc = device_private(todrch->todr_dev); 182 ds1687_todregs regs; 183 int s; 184 185 s = splhigh(); 186 DS1687_GETTOD(sc, ®s); 187 splx(s); 188 189 dt->dt_sec = bcdtobin(regs[DS1687_SOFT_SEC]); 190 dt->dt_min = bcdtobin(regs[DS1687_SOFT_MIN]); 191 dt->dt_hour = bcdtobin(regs[DS1687_SOFT_HOUR]); 192 dt->dt_wday = bcdtobin(regs[DS1687_SOFT_DOW]); 193 dt->dt_day = bcdtobin(regs[DS1687_SOFT_DOM]); 194 dt->dt_mon = bcdtobin(regs[DS1687_SOFT_MONTH]); 195 dt->dt_year = bcdtobin(regs[DS1687_SOFT_YEAR]) + 196 (100 * bcdtobin(regs[DS1687_SOFT_CENTURY])); 197 198 return 0; 199 } 200 201 static int 202 mcclock_mace_settime_ymdhms(todr_chip_handle_t todrch, struct clock_ymdhms *dt) 203 { 204 struct mcclock_mace_softc *sc = device_private(todrch->todr_dev); 205 ds1687_todregs regs; 206 int s; 207 208 memset(®s, 0, sizeof(regs)); 209 210 regs[DS1687_SOFT_SEC] = bintobcd(dt->dt_sec); 211 regs[DS1687_SOFT_MIN] = bintobcd(dt->dt_min); 212 regs[DS1687_SOFT_HOUR] = bintobcd(dt->dt_hour); 213 regs[DS1687_SOFT_DOW] = bintobcd(dt->dt_wday); 214 regs[DS1687_SOFT_DOM] = bintobcd(dt->dt_day); 215 regs[DS1687_SOFT_MONTH] = bintobcd(dt->dt_mon); 216 regs[DS1687_SOFT_YEAR] = bintobcd(dt->dt_year % 100); 217 regs[DS1687_SOFT_CENTURY] = bintobcd(dt->dt_year / 100); 218 s = splhigh(); 219 DS1687_PUTTOD(sc, ®s); 220 splx(s); 221 222 return 0; 223 } 224 225 void 226 mcclock_poweroff(void) 227 { 228 uint8_t a, xctl_a, xctl_b; 229 230 if (mace0 == NULL) 231 return; 232 233 (void)splhigh(); 234 a = ds1687_read(mace0, DS1687_CONTROLA); 235 a &= ~DS1687_DV2; 236 a |= DS1687_DV1; 237 ds1687_write(mace0, DS1687_CONTROLA, a | DS1687_BANK1); 238 wbflush(); 239 240 xctl_b = ds1687_read(mace0, DS1687_BANK1_XCTRL4B); 241 xctl_b |= DS1687_X4B_ABE | DS1687_X4B_KIE; 242 ds1687_write(mace0, DS1687_BANK1_XCTRL4B, xctl_b); 243 244 xctl_a = ds1687_read(mace0, DS1687_BANK1_XCTRL4A); 245 xctl_a &= ~(DS1687_X4A_RCF | DS1687_X4A_WAF | DS1687_X4A_KF); 246 ds1687_write(mace0, DS1687_BANK1_XCTRL4A, xctl_a); 247 wbflush(); 248 249 /* and down we go */ 250 ds1687_write(mace0, DS1687_BANK1_XCTRL4A, xctl_a | DS1687_X4A_PAB); 251 ds1687_write(mace0, DS1687_CONTROLA, a); 252 wbflush(); 253 for (;;) 254 ; 255 } 256
Indexes created Tue Sep 30 07:10:03 GMT 2025