a34kbbc.c revision 1.24
1 /* $NetBSD: a34kbbc.c,v 1.24 2025/09/07 00:41:19 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1988 University of Utah. 5 * Copyright (c) 1982, 1990 The Regents of the University of California. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * the Systems Programming Group of the University of Utah Computer 10 * Science Department. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * from: Utah $Hdr: clock.c 1.18 91/01/21$ 37 * 38 * @(#)clock.c 7.6 (Berkeley) 5/7/91 39 */ 40 41 #include <sys/cdefs.h> 42 __KERNEL_RCSID(0, "$NetBSD: a34kbbc.c,v 1.24 2025/09/07 00:41:19 thorpej Exp $"); 43 44 #include <sys/param.h> 45 #include <sys/kernel.h> 46 #include <sys/device.h> 47 #include <sys/systm.h> 48 #include <machine/psl.h> 49 #include <machine/cpu.h> 50 #include <amiga/amiga/device.h> 51 #include <amiga/amiga/custom.h> 52 #include <amiga/amiga/cia.h> 53 #include <amiga/dev/rtc.h> 54 #include <amiga/dev/zbusvar.h> 55 56 #include <dev/clock_subr.h> 57 58 static int a34kbbc_match(device_t, cfdata_t, void *); 59 static void a34kbbc_attach(device_t, device_t, void *); 60 61 struct a34kbbc_softc { 62 device_t sc_dev; 63 struct todr_chip_handle sc_todr; 64 volatile struct rtclock3000 *sc_addr; 65 }; 66 67 CFATTACH_DECL_NEW(a34kbbc, sizeof(struct a34kbbc_softc), 68 a34kbbc_match, a34kbbc_attach, NULL, NULL); 69 70 static int a34kbbc_read(volatile struct rtclock3000 *, 71 struct clock_ymdhms *); 72 static int a34kugettod(todr_chip_handle_t, struct clock_ymdhms *); 73 static int a34kusettod(todr_chip_handle_t, struct clock_ymdhms *); 74 75 static int 76 a34kbbc_match(device_t parent, cfdata_t cf, void *aux) 77 { 78 struct clock_ymdhms dt; 79 static int a34kbbc_matched = 0; 80 81 if (!matchname("a34kbbc", aux)) 82 return(0); 83 84 /* Allow only one instance. */ 85 if (a34kbbc_matched) 86 return(0); 87 88 if (!(is_a3000() || is_a4000())) 89 return(0); 90 91 if (a34kbbc_read(ztwomap(0xdc0000), &dt) != 0) 92 return(0); 93 94 a34kbbc_matched = 1; 95 return(1); 96 } 97 98 /* 99 * Attach us to the rtc function pointers. 100 */ 101 static void 102 a34kbbc_attach(device_t parent, device_t self, void *aux) 103 { 104 struct a34kbbc_softc *sc = device_private(self); 105 106 printf("\n"); 107 108 sc->sc_dev = self; 109 sc->sc_addr = ztwomap(0xdc0000); 110 111 sc->sc_todr.cookie = sc; 112 sc->sc_todr.todr_gettime_ymdhms = a34kugettod; 113 sc->sc_todr.todr_settime_ymdhms = a34kusettod; 114 todr_attach(&sc->sc_todr); 115 } 116 117 static int 118 a34kbbc_read(volatile struct rtclock3000 *rt, struct clock_ymdhms *dt) 119 { 120 121 /* hold clock */ 122 rt->control1 = A3CONTROL1_HOLD_CLOCK; 123 124 /* Copy the info. Careful about the order! */ 125 dt->dt_sec = rt->second1 * 10 + rt->second2; 126 dt->dt_min = rt->minute1 * 10 + rt->minute2; 127 dt->dt_hour = rt->hour1 * 10 + rt->hour2; 128 dt->dt_wday = rt->weekday; 129 dt->dt_day = rt->day1 * 10 + rt->day2; 130 dt->dt_mon = rt->month1 * 10 + rt->month2; 131 dt->dt_year = rt->year1 * 10 + rt->year2; 132 133 dt->dt_year += CLOCK_BASE_YEAR; 134 /* let it run again.. */ 135 rt->control1 = A3CONTROL1_FREE_CLOCK; 136 137 if (dt->dt_year < STARTOFTIME) 138 dt->dt_year += 100; 139 140 /* 141 * These checks are mostly redundant against those already in the 142 * generic todr, but apparently the attach code checks against the 143 * return value of this function, so we have to include a check here, 144 * too. 145 */ 146 if ((dt->dt_hour > 23) || 147 (dt->dt_wday > 6) || 148 (dt->dt_day > 31) || 149 (dt->dt_mon > 12) || 150 /* (dt.dt_year < STARTOFTIME) || */ (dt->dt_year > 2036)) 151 return (EINVAL); 152 153 return (0); 154 } 155 156 static int 157 a34kugettod(todr_chip_handle_t h, struct clock_ymdhms *dt) 158 { 159 struct a34kbbc_softc *sc = h->cookie; 160 161 return a34kbbc_read(sc->sc_addr, dt); 162 } 163 164 static int 165 a34kusettod(todr_chip_handle_t h, struct clock_ymdhms *dt) 166 { 167 struct a34kbbc_softc *sc = h->cookie; 168 volatile struct rtclock3000 *rt = sc->sc_addr; 169 170 /* 171 * there seem to be problems with the bitfield addressing 172 * currently used.. 173 */ 174 175 rt->control1 = A3CONTROL1_HOLD_CLOCK; /* implies mode 0 */ 176 rt->second1 = dt->dt_sec / 10; 177 rt->second2 = dt->dt_sec % 10; 178 rt->minute1 = dt->dt_min / 10; 179 rt->minute2 = dt->dt_min % 10; 180 rt->hour1 = dt->dt_hour / 10; 181 rt->hour2 = dt->dt_hour % 10; 182 rt->weekday = dt->dt_wday; 183 rt->day1 = dt->dt_day / 10; 184 rt->day2 = dt->dt_day % 10; 185 rt->month1 = dt->dt_mon / 10; 186 rt->month2 = dt->dt_mon % 10; 187 rt->year1 = (dt->dt_year / 10) % 10; 188 rt->year2 = dt->dt_year % 10; 189 rt->control1 = A3CONTROL1_HOLD_CLOCK | 1; /* mode 1 registers */ 190 rt->leapyear = dt->dt_year; /* XXX implicit % 4 */ 191 rt->control1 = A3CONTROL1_FREE_CLOCK; /* implies mode 1 */ 192 193 return (0); 194 } 195
Indexes created Thu Sep 25 16:09:42 GMT 2025