a2kbbc.c revision 1.22
1/* $NetBSD: a2kbbc.c,v 1.22 2011/02/08 20:20:08 rmind 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: a2kbbc.c,v 1.22 2011/02/08 20:20:08 rmind 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 58int a2kbbc_match(struct device *, struct cfdata *, void *); 59void a2kbbc_attach(struct device *, struct device *, void *); 60 61CFATTACH_DECL(a2kbbc, sizeof(struct device), 62 a2kbbc_match, a2kbbc_attach, NULL, NULL); 63 64void *a2kclockaddr; 65int a2kugettod(todr_chip_handle_t, struct clock_ymdhms *); 66int a2kusettod(todr_chip_handle_t, struct clock_ymdhms *); 67static struct todr_chip_handle a2ktodr; 68 69int 70a2kbbc_match(struct device *pdp, struct cfdata *cfp, void *auxp) 71{ 72 struct clock_ymdhms dt; 73 static int a2kbbc_matched = 0; 74 75 if (!matchname("a2kbbc", auxp)) 76 return (0); 77 78 /* Allow only one instance. */ 79 if (a2kbbc_matched) 80 return (0); 81 82 if (/* is_a1200() || */ is_a3000() || is_a4000() 83#ifdef DRACO 84 || is_draco() 85#endif 86 ) 87 return (0); 88 89 a2kclockaddr = (void *)__UNVOLATILE(ztwomap(0xdc0000)); 90 if (a2kugettod(&a2ktodr, &dt) != 0) 91 return (0); 92 93 a2kbbc_matched = 1; 94 return (1); 95} 96 97/* 98 * Attach us to the rtc function pointers. 99 */ 100void 101a2kbbc_attach(struct device *pdp, struct device *dp, void *auxp) 102{ 103 printf("\n"); 104 a2kclockaddr = (void *)__UNVOLATILE(ztwomap(0xdc0000)); 105 106 a2ktodr.cookie = a2kclockaddr; 107 a2ktodr.todr_gettime_ymdhms = a2kugettod; 108 a2ktodr.todr_settime_ymdhms = a2kusettod; 109 todr_attach(&a2ktodr); 110} 111 112int 113a2kugettod(todr_chip_handle_t h, struct clock_ymdhms *dt) 114{ 115 struct rtclock2000 *rt; 116 int i; 117 118 rt = a2kclockaddr; 119 120 /* 121 * hold clock 122 */ 123 rt->control1 |= A2CONTROL1_HOLD; 124 i = 0x1000; 125 while (rt->control1 & A2CONTROL1_BUSY && i--) 126 ; 127 if (rt->control1 & A2CONTROL1_BUSY) 128 return (ENXIO); /* Give up and say it's not there */ 129 130 /* Copy the info. Careful about the order! */ 131 dt->dt_sec = rt->second1 * 10 + rt->second2; 132 dt->dt_min = rt->minute1 * 10 + rt->minute2; 133 dt->dt_hour = (rt->hour1 & 3) * 10 + rt->hour2; 134 dt->dt_day = rt->day1 * 10 + rt->day2; 135 dt->dt_mon = rt->month1 * 10 + rt->month2; 136 dt->dt_year = rt->year1 * 10 + rt->year2; 137 dt->dt_wday = rt->weekday; 138 139 /* 140 * The oki clock chip has a register to put the clock into 141 * 12/24h mode. 142 * 143 * clockmode | A2HOUR1_PM 144 * 24h 12h | am = 0, pm = 1 145 * --------------------------------- 146 * 0 12 | 0 147 * 1 1 | 0 148 * .. .. | 0 149 * 11 11 | 0 150 * 12 12 | 1 151 * 13 1 | 1 152 * .. .. | 1 153 * 23 11 | 1 154 * 155 */ 156 157 if ((rt->control3 & A2CONTROL3_24HMODE) == 0) { 158 if ((rt->hour1 & A2HOUR1_PM) == 0 && dt->dt_hour == 12) 159 dt->dt_hour = 0; 160 else if ((rt->hour1 & A2HOUR1_PM) && dt->dt_hour != 12) 161 dt->dt_hour += 12; 162 } 163 164 /* 165 * release the clock 166 */ 167 rt->control1 &= ~A2CONTROL1_HOLD; 168 169 dt->dt_year += CLOCK_BASE_YEAR; 170 if (dt->dt_year < STARTOFTIME) 171 dt->dt_year += 100; 172 173 /* 174 * Note that this check is redundant with one in kern_todr.c, but 175 * attach relies on it being here. 176 */ 177 if ((dt->dt_hour > 23) || 178 (dt->dt_day > 31) || 179 (dt->dt_mon > 12) || 180 /* (dt->dt_year < STARTOFTIME) || */ (dt->dt_year > 2036)) 181 return (EINVAL); 182 183 return (0); 184} 185 186int 187a2kusettod(todr_chip_handle_t h, struct clock_ymdhms *dt) 188{ 189 struct rtclock2000 *rt; 190 int ampm, i; 191 192 rt = a2kclockaddr; 193 /* 194 * there seem to be problems with the bitfield addressing 195 * currently used.. 196 */ 197 if (! rt) 198 return (ENXIO); 199 200 /* 201 * hold clock 202 */ 203 rt->control1 |= A2CONTROL1_HOLD; 204 i = 0x1000; 205 while (rt->control1 & A2CONTROL1_BUSY && i--) 206 ; 207 if (rt->control1 & A2CONTROL1_BUSY) 208 return (ENXIO); /* Give up and say it's not there */ 209 210 ampm = 0; 211 if ((rt->control3 & A2CONTROL3_24HMODE) == 0) { 212 if (dt->dt_hour >= 12) { 213 ampm = A2HOUR1_PM; 214 if (dt->dt_hour != 12) 215 dt->dt_hour -= 12; 216 } else if (dt->dt_hour == 0) { 217 dt->dt_hour = 12; 218 } 219 } 220 rt->hour1 = (dt->dt_hour / 10) | ampm; 221 rt->hour2 = dt->dt_hour % 10; 222 rt->second1 = dt->dt_sec / 10; 223 rt->second2 = dt->dt_sec % 10; 224 rt->minute1 = dt->dt_min / 10; 225 rt->minute2 = dt->dt_min % 10; 226 rt->day1 = dt->dt_day / 10; 227 rt->day2 = dt->dt_day % 10; 228 rt->month1 = dt->dt_mon / 10; 229 rt->month2 = dt->dt_mon % 10; 230 rt->year1 = (dt->dt_year / 10) % 10; 231 rt->year2 = dt->dt_year % 10; 232 rt->weekday = dt->dt_wday; 233 234 /* 235 * release the clock 236 */ 237 rt->control2 &= ~A2CONTROL1_HOLD; 238 239 return (0); 240} 241