dpclock.c revision 1.8
1 /* $NetBSD: dpclock.c,v 1.8 2025/09/07 04:47:00 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 2001 Erik Reid 5 * Copyright (c) 2001 Rafal K. Boni 6 * Copyright (c) 2001 Christopher Sekiya 7 * Copyright (c) 1998, 1999, 2000 The NetBSD Foundation, Inc. 8 * All rights reserved. 9 * 10 * Portions of this code are derived from software contributed to The 11 * NetBSD Foundation by Jason R. Thorpe of the Numerical Aerospace 12 * Simulation Facility, NASA Ames Research Center. 13 * 14 * Redistribution and use in source and binary forms, with or without 15 * modification, are permitted provided that the following conditions 16 * are met: 17 * 1. Redistributions of source code must retain the above copyright 18 * notice, this list of conditions and the following disclaimer. 19 * 2. Redistributions in binary form must reproduce the above copyright 20 * notice, this list of conditions and the following disclaimer in the 21 * documentation and/or other materials provided with the distribution. 22 * 3. The name of the author may not be used to endorse or promote products 23 * derived from this software without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 26 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 27 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 28 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 29 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 30 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 31 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 32 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 33 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 34 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 35 */ 36 37 #include <sys/param.h> 38 #include <sys/kernel.h> 39 #include <sys/systm.h> 40 #include <sys/device.h> 41 42 #include <sys/bus.h> 43 #include <machine/autoconf.h> 44 #include <machine/sysconf.h> 45 #include <machine/machtype.h> 46 47 #include <dev/clock_subr.h> 48 #include <sgimips/dev/dp8573areg.h> 49 50 #include <sgimips/sgimips/clockvar.h> 51 52 struct dpclock_softc { 53 struct todr_chip_handle sc_todrch; 54 55 /* RTC registers */ 56 bus_space_tag_t sc_rtct; 57 bus_space_handle_t sc_rtch; 58 int sc_offset; 59 }; 60 61 static int dpclock_match(device_t, cfdata_t, void *); 62 static void dpclock_attach(device_t, device_t, void *); 63 static int dpclock_gettime_ymdhms(struct todr_chip_handle *, 64 struct clock_ymdhms *); 65 static int dpclock_settime_ymdhms(struct todr_chip_handle *, 66 struct clock_ymdhms *); 67 68 CFATTACH_DECL_NEW(dpclock, sizeof(struct dpclock_softc), 69 dpclock_match, dpclock_attach, NULL, NULL); 70 71 static int 72 dpclock_match(device_t parent, cfdata_t cf, void *aux) 73 { 74 struct mainbus_attach_args *ma = aux; 75 76 switch (mach_type) { 77 case MACH_SGI_IP6 | MACH_SGI_IP10: 78 if (ma->ma_addr == 0x1fbc0000) 79 return (1); 80 break; 81 82 case MACH_SGI_IP12: 83 case MACH_SGI_IP20: 84 if (ma->ma_addr == 0x1fb80e00) 85 return (1); 86 break; 87 } 88 89 return (0); 90 } 91 92 static void 93 writereg(struct dpclock_softc *sc, uint32_t reg, uint8_t val) 94 { 95 bus_space_write_1(sc->sc_rtct, sc->sc_rtch, 96 (reg << 2) + sc->sc_offset, val); 97 } 98 99 static uint8_t 100 readreg(struct dpclock_softc *sc, uint32_t reg) 101 { 102 return bus_space_read_1(sc->sc_rtct, sc->sc_rtch, 103 (reg << 2) + sc->sc_offset); 104 } 105 106 static void 107 dpclock_attach(device_t parent, device_t self, void *aux) 108 { 109 struct dpclock_softc *sc = device_private(self); 110 struct mainbus_attach_args *ma = aux; 111 int err; 112 113 printf("\n"); 114 115 sc->sc_rtct = normal_memt; 116 /* 117 * All machines have one byte register per word. IP6/IP10 use 118 * the MSB, others the LSB. 119 */ 120 if (mach_type == MACH_SGI_IP12 || mach_type == MACH_SGI_IP20) 121 sc->sc_offset = 3; 122 else 123 sc->sc_offset = 0; 124 125 if ((err = bus_space_map(sc->sc_rtct, ma->ma_addr, 0x1ffff, 126 BUS_SPACE_MAP_LINEAR, &sc->sc_rtch)) != 0) { 127 printf(": unable to map RTC registers, error = %d\n", err); 128 return; 129 } 130 131 sc->sc_todrch.cookie = sc; 132 sc->sc_todrch.todr_gettime_ymdhms = dpclock_gettime_ymdhms; 133 sc->sc_todrch.todr_settime_ymdhms = dpclock_settime_ymdhms; 134 135 todr_attach(&sc->sc_todrch); 136 } 137 138 /* 139 * Get the time of day, based on the clock's value and/or the base value. 140 */ 141 static int 142 dpclock_gettime_ymdhms(struct todr_chip_handle *todrch, struct clock_ymdhms *dt) 143 { 144 struct dpclock_softc *sc = (struct dpclock_softc *)todrch->cookie; 145 int s; 146 u_int8_t i, j; 147 u_int8_t regs[32]; 148 149 s = splhigh(); 150 i = readreg(sc, DP8573A_TIMESAVE_CTL); 151 j = i | DP8573A_TIMESAVE_CTL_EN; 152 writereg(sc, DP8573A_TIMESAVE_CTL, j); 153 writereg(sc, DP8573A_TIMESAVE_CTL, i); 154 splx(s); 155 156 for (i = 0; i < 32; i++) 157 regs[i] = readreg(sc, i); 158 159 dt->dt_sec = bcdtobin(regs[DP8573A_SAVE_SEC]); 160 dt->dt_min = bcdtobin(regs[DP8573A_SAVE_MIN]); 161 162 if (regs[DP8573A_RT_MODE] & DP8573A_RT_MODE_1224) { 163 dt->dt_hour = bcdtobin(regs[DP8573A_SAVE_HOUR] & 164 DP8573A_HOUR_12HR_MASK) + 165 ((regs[DP8573A_SAVE_HOUR] & DP8573A_RT_MODE_1224) ? 0 : 12); 166 167 /* 168 * In AM/PM mode, hour range is 01-12, so adding in 12 hours 169 * for PM gives us 01-24, whereas we want 00-23, so map hour 170 * 24 to hour 0. 171 */ 172 173 if (dt->dt_hour == 24) 174 dt->dt_hour = 0; 175 } else { 176 dt->dt_hour = bcdtobin(regs[DP8573A_SAVE_HOUR] & 177 DP8573A_HOUR_24HR_MASK); 178 } 179 180 dt->dt_wday = bcdtobin(regs[DP8573A_DOW]); /* Not from time saved */ 181 dt->dt_day = bcdtobin(regs[DP8573A_SAVE_DOM]); 182 dt->dt_mon = bcdtobin(regs[DP8573A_SAVE_MONTH]); 183 dt->dt_year = FROM_IRIX_YEAR(bcdtobin(regs[DP8573A_YEAR])); 184 185 return (0); 186 } 187 188 /* 189 * Reset the TODR based on the time value. 190 */ 191 static int 192 dpclock_settime_ymdhms(struct todr_chip_handle *todrch, struct clock_ymdhms *dt) 193 { 194 struct dpclock_softc *sc = (struct dpclock_softc *)todrch->cookie; 195 int s; 196 u_int8_t i, j; 197 u_int8_t regs[32]; 198 199 s = splhigh(); 200 i = readreg(sc, DP8573A_TIMESAVE_CTL); 201 j = i | DP8573A_TIMESAVE_CTL_EN; 202 writereg(sc, DP8573A_TIMESAVE_CTL, j); 203 writereg(sc, DP8573A_TIMESAVE_CTL, i); 204 splx(s); 205 206 for (i = 0; i < 32; i++) 207 regs[i] = readreg(sc, i); 208 209 regs[DP8573A_SUBSECOND] = 0; 210 regs[DP8573A_SECOND] = bintobcd(dt->dt_sec); 211 regs[DP8573A_MINUTE] = bintobcd(dt->dt_min); 212 regs[DP8573A_HOUR] = bintobcd(dt->dt_hour) & DP8573A_HOUR_24HR_MASK; 213 regs[DP8573A_DOW] = bintobcd(dt->dt_wday); 214 regs[DP8573A_DOM] = bintobcd(dt->dt_day); 215 regs[DP8573A_MONTH] = bintobcd(dt->dt_mon); 216 regs[DP8573A_YEAR] = bintobcd(TO_IRIX_YEAR(dt->dt_year)); 217 218 s = splhigh(); 219 i = readreg(sc, DP8573A_RT_MODE); 220 j = i & ~DP8573A_RT_MODE_CLKSS; 221 writereg(sc, DP8573A_RT_MODE, j); 222 223 for (i = 0; i < 10; i++) 224 writereg(sc, DP8573A_COUNTERS +i, regs[DP8573A_COUNTERS + i]); 225 226 writereg(sc, DP8573A_RT_MODE, i); 227 splx(s); 228 229 return (0); 230 } 231
Indexes created Thu Oct 02 10:09:58 GMT 2025