1 /* $NetBSD: dsclock.c,v 1.9 2025/09/07 21:45:14 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 2001 Rafal K. Boni 5 * Copyright (c) 2001 Christopher Sekiya 6 * Copyright (c) 1998, 1999, 2000 The NetBSD Foundation, Inc. 7 * All rights reserved. 8 * 9 * Portions of this code are derived from software contributed to The 10 * NetBSD Foundation by Jason R. Thorpe of the Numerical Aerospace 11 * Simulation Facility, NASA Ames Research Center. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. The name of the author may not be used to endorse or promote products 22 * derived from this software without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 25 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 26 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 27 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 28 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 29 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 30 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 31 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 32 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 33 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 __KERNEL_RCSID(0, "$NetBSD: dsclock.c,v 1.9 2025/09/07 21:45:14 thorpej Exp $"); 38 39 #include <sys/param.h> 40 #include <sys/kernel.h> 41 #include <sys/systm.h> 42 #include <sys/device.h> 43 44 #include <sys/bus.h> 45 #include <machine/autoconf.h> 46 #include <machine/sysconf.h> 47 #include <machine/machtype.h> 48 49 #include <dev/clock_subr.h> 50 #include <dev/ic/ds1286reg.h> 51 52 #include <sgimips/sgimips/clockvar.h> 53 54 struct dsclock_softc { 55 device_t sc_dev; 56 57 struct todr_chip_handle sc_todrch; 58 59 /* RTC registers */ 60 bus_space_tag_t sc_rtct; 61 bus_space_handle_t sc_rtch; 62 }; 63 64 static int dsclock_match(device_t, cfdata_t, void *); 65 static void dsclock_attach(device_t, device_t, void *); 66 static int dsclock_gettime_ymdhms(struct todr_chip_handle *, 67 struct clock_ymdhms *); 68 static int dsclock_settime_ymdhms(struct todr_chip_handle *, 69 struct clock_ymdhms *); 70 71 CFATTACH_DECL_NEW(dsclock, sizeof(struct dsclock_softc), 72 dsclock_match, dsclock_attach, NULL, NULL); 73 74 #define ds1286_write(sc, reg, datum) \ 75 bus_space_write_1((sc)->sc_rtct, (sc)->sc_rtch, (reg << 2) + 3, (datum)) 76 #define ds1286_read(sc, reg) \ 77 bus_space_read_1((sc)->sc_rtct, (sc)->sc_rtch, (reg << 2) + 3) 78 79 static int 80 dsclock_match(device_t parent, cfdata_t cf, void *aux) 81 { 82 struct mainbus_attach_args *ma = aux; 83 84 if (mach_type == MACH_SGI_IP22 && ma->ma_addr == 0x1fbe0000) 85 return 1; 86 87 return 0; 88 } 89 90 static void 91 dsclock_attach(device_t parent, device_t self, void *aux) 92 { 93 struct dsclock_softc *sc = device_private(self); 94 struct mainbus_attach_args *ma = aux; 95 int err; 96 97 aprint_normal("\n"); 98 99 sc->sc_dev = self; 100 sc->sc_rtct = normal_memt; 101 if ((err = bus_space_map(sc->sc_rtct, ma->ma_addr, 0x1ffff, 102 BUS_SPACE_MAP_LINEAR, &sc->sc_rtch)) != 0) { 103 aprint_error_dev(self, 104 "unable to map RTC registers, error = %d\n", err); 105 return; 106 } 107 108 sc->sc_todrch.todr_dev = self; 109 sc->sc_todrch.todr_gettime_ymdhms = dsclock_gettime_ymdhms; 110 sc->sc_todrch.todr_settime_ymdhms = dsclock_settime_ymdhms; 111 112 todr_attach(&sc->sc_todrch); 113 } 114 115 /* 116 * Get the time of day, based on the clock's value and/or the base value. 117 */ 118 static int 119 dsclock_gettime_ymdhms(struct todr_chip_handle *todrch, struct clock_ymdhms *dt) 120 { 121 struct dsclock_softc *sc = device_private(todrch->todr_dev); 122 ds1286_todregs regs; 123 int s; 124 125 s = splhigh(); 126 DS1286_GETTOD(sc, ®s) 127 splx(s); 128 129 dt->dt_sec = bcdtobin(regs[DS1286_SEC]); 130 dt->dt_min = bcdtobin(regs[DS1286_MIN]); 131 132 if (regs[DS1286_HOUR] & DS1286_HOUR_12MODE) { 133 dt->dt_hour = 134 bcdtobin(regs[DS1286_HOUR] & DS1286_HOUR_12HR_MASK) 135 + ((regs[DS1286_HOUR] & DS1286_HOUR_12HR_PM) ? 12 : 0); 136 137 /* 138 * In AM/PM mode, hour range is 01-12, so adding in 12 hours 139 * for PM gives us 01-24, whereas we want 00-23, so map hour 140 * 24 to hour 0. 141 */ 142 if (dt->dt_hour == 24) 143 dt->dt_hour = 0; 144 } else { 145 dt->dt_hour = 146 bcdtobin(regs[DS1286_HOUR] & DS1286_HOUR_24HR_MASK); 147 } 148 149 dt->dt_wday = bcdtobin(regs[DS1286_DOW]); 150 dt->dt_day = bcdtobin(regs[DS1286_DOM]); 151 dt->dt_mon = bcdtobin(regs[DS1286_MONTH] & DS1286_MONTH_MASK); 152 dt->dt_year = FROM_IRIX_YEAR(bcdtobin(regs[DS1286_YEAR])); 153 154 return 0; 155 } 156 157 /* 158 * Reset the TODR based on the time value. 159 */ 160 static int 161 dsclock_settime_ymdhms(struct todr_chip_handle *todrch, struct clock_ymdhms *dt) 162 { 163 struct dsclock_softc *sc = device_private(todrch->todr_dev); 164 ds1286_todregs regs; 165 int s; 166 167 s = splhigh(); 168 DS1286_GETTOD(sc, ®s); 169 splx(s); 170 171 regs[DS1286_SUBSEC] = 0; 172 regs[DS1286_SEC] = bintobcd(dt->dt_sec); 173 regs[DS1286_MIN] = bintobcd(dt->dt_min); 174 regs[DS1286_HOUR] = bintobcd(dt->dt_hour) & DS1286_HOUR_24HR_MASK; 175 regs[DS1286_DOW] = bintobcd(dt->dt_wday); 176 regs[DS1286_DOM] = bintobcd(dt->dt_day); 177 178 /* Leave wave-generator bits as set originally */ 179 regs[DS1286_MONTH] &= ~DS1286_MONTH_MASK; 180 regs[DS1286_MONTH] |= bintobcd(dt->dt_mon) & DS1286_MONTH_MASK; 181 182 regs[DS1286_YEAR] = bintobcd(TO_IRIX_YEAR(dt->dt_year)); 183 184 s = splhigh(); 185 DS1286_PUTTOD(sc, ®s); 186 splx(s); 187 188 return 0; 189 } 190
Indexes created Wed Sep 24 05:09:52 GMT 2025