sys/arch/amiga/dev/a2kbbc.c

   1 /*      $NetBSD: a2kbbc.c,v 1.20 2006/09/11 17:18:00 gdamore Exp $ */
   2
   3 /*
   4  * Copyright (c) 1982, 1990 The Regents of the University of California.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to Berkeley by
   8  * the Systems Programming Group of the University of Utah Computer
   9  * Science Department.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. Neither the name of the University nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  *
  35  * from: Utah $Hdr: clock.c 1.18 91/01/21$
  36  *
  37  *      @(#)clock.c     7.6 (Berkeley) 5/7/91
  38  */
  39
  40 /*
  41  * Copyright (c) 1988 University of Utah.
  42  *
  43  * This code is derived from software contributed to Berkeley by
  44  * the Systems Programming Group of the University of Utah Computer
  45  * Science Department.
  46  *
  47  * Redistribution and use in source and binary forms, with or without
  48  * modification, are permitted provided that the following conditions
  49  * are met:
  50  * 1. Redistributions of source code must retain the above copyright
  51  *    notice, this list of conditions and the following disclaimer.
  52  * 2. Redistributions in binary form must reproduce the above copyright
  53  *    notice, this list of conditions and the following disclaimer in the
  54  *    documentation and/or other materials provided with the distribution.
  55  * 3. All advertising materials mentioning features or use of this software
  56  *    must display the following acknowledgement:
  57  *      This product includes software developed by the University of
  58  *      California, Berkeley and its contributors.
  59  * 4. Neither the name of the University nor the names of its contributors
  60  *    may be used to endorse or promote products derived from this software
  61  *    without specific prior written permission.
  62  *
  63  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  64  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  65  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  66  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  67  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  68  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  69  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  70  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  71  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  72  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  73  * SUCH DAMAGE.
  74  *
  75  * from: Utah $Hdr: clock.c 1.18 91/01/21$
  76  *
  77  *      @(#)clock.c     7.6 (Berkeley) 5/7/91
  78  */
  79
  80 #include <sys/cdefs.h>
  81 __KERNEL_RCSID(0, "$NetBSD: a2kbbc.c,v 1.20 2006/09/11 17:18:00 gdamore Exp $");
  82
  83 #include <sys/param.h>
  84 #include <sys/kernel.h>
  85 #include <sys/device.h>
  86 #include <sys/systm.h>
  87 #include <machine/psl.h>
  88 #include <machine/cpu.h>
  89 #include <amiga/amiga/device.h>
  90 #include <amiga/amiga/custom.h>
  91 #include <amiga/amiga/cia.h>
  92 #include <amiga/dev/rtc.h>
  93 #include <amiga/dev/zbusvar.h>
  94
  95 #include <dev/clock_subr.h>
  96
  97 int a2kbbc_match(struct device *, struct cfdata *, void *);
  98 void a2kbbc_attach(struct device *, struct device *, void *);
  99
 100 CFATTACH_DECL(a2kbbc, sizeof(struct device),
 101     a2kbbc_match, a2kbbc_attach, NULL, NULL);
 102
 103 void *a2kclockaddr;
 104 int a2kugettod(todr_chip_handle_t, struct clock_ymdhms *);
 105 int a2kusettod(todr_chip_handle_t, struct clock_ymdhms *);
 106 static struct todr_chip_handle a2ktodr;
 107
 108 int
 109 a2kbbc_match(struct device *pdp, struct cfdata *cfp, void *auxp)
 110 {
 111         struct clock_ymdhms dt;
 112         static int a2kbbc_matched = 0;
 113
 114         if (!matchname("a2kbbc", auxp))
 115                 return (0);
 116
 117         /* Allow only one instance. */
 118         if (a2kbbc_matched)
 119                 return (0);
 120
 121         if (/* is_a1200() || */ is_a3000() || is_a4000()
 122 #ifdef DRACO
 123             || is_draco()
 124 #endif
 125             )
 126                 return (0);
 127
 128         a2kclockaddr = (void *)__UNVOLATILE(ztwomap(0xdc0000));
 129         if (a2kugettod(&a2ktodr, &dt) != 0)
 130                 return (0);
 131
 132         a2kbbc_matched = 1;
 133         return (1);
 134 }
 135
 136 /*
 137  * Attach us to the rtc function pointers.
 138  */
 139 void
 140 a2kbbc_attach(struct device *pdp, struct device *dp, void *auxp)
 141 {
 142         printf("\n");
 143         a2kclockaddr = (void *)__UNVOLATILE(ztwomap(0xdc0000));
 144
 145         a2ktodr.cookie = a2kclockaddr;
 146         a2ktodr.todr_gettime_ymdhms = a2kugettod;
 147         a2ktodr.todr_settime_ymdhms = a2kusettod;
 148         todr_attach(&a2ktodr);
 149 }
 150
 151 int
 152 a2kugettod(todr_chip_handle_t h, struct clock_ymdhms *dt)
 153 {
 154         struct rtclock2000 *rt;
 155         int i;
 156
 157         rt = a2kclockaddr;
 158
 159         /*
 160          * hold clock
 161          */
 162         rt->control1 |= A2CONTROL1_HOLD;
 163         i = 0x1000;
 164         while (rt->control1 & A2CONTROL1_BUSY && i--)
 165                 ;
 166         if (rt->control1 & A2CONTROL1_BUSY)
 167                 return (ENXIO);         /* Give up and say it's not there */
 168
 169         /* Copy the info.  Careful about the order! */
 170         dt->dt_sec   = rt->second1 * 10 + rt->second2;
 171         dt->dt_min   = rt->minute1 * 10 + rt->minute2;
 172         dt->dt_hour  = (rt->hour1 & 3) * 10 + rt->hour2;
 173         dt->dt_day   = rt->day1    * 10 + rt->day2;
 174         dt->dt_mon   = rt->month1  * 10 + rt->month2;
 175         dt->dt_year  = rt->year1   * 10 + rt->year2;
 176         dt->dt_wday  = rt->weekday;
 177
 178         /*
 179          * The oki clock chip has a register to put the clock into
 180          * 12/24h mode.
 181          *
 182          *  clockmode   |    A2HOUR1_PM
 183          *  24h   12h   |  am = 0, pm = 1
 184          * ---------------------------------
 185          *   0    12    |       0
 186          *   1     1    |       0
 187          *  ..    ..    |       0
 188          *  11    11    |       0
 189          *  12    12    |       1
 190          *  13     1    |       1
 191          *  ..    ..    |       1
 192          *  23    11    |       1
 193          *
 194          */
 195
 196         if ((rt->control3 & A2CONTROL3_24HMODE) == 0) {
 197                 if ((rt->hour1 & A2HOUR1_PM) == 0 && dt->dt_hour == 12)
 198                         dt->dt_hour = 0;
 199                 else if ((rt->hour1 & A2HOUR1_PM) && dt->dt_hour != 12)
 200                         dt->dt_hour += 12;
 201         }
 202
 203         /*
 204          * release the clock
 205          */
 206         rt->control1 &= ~A2CONTROL1_HOLD;
 207
 208         dt->dt_year += CLOCK_BASE_YEAR;
 209         if (dt->dt_year < STARTOFTIME)
 210                 dt->dt_year += 100;
 211
 212         /*
 213          * Note that this check is redundant with one in kern_todr.c, but
 214          * attach relies on it being here.
 215          */
 216         if ((dt->dt_hour > 23) ||
 217             (dt->dt_day  > 31) ||
 218             (dt->dt_mon  > 12) ||
 219             /* (dt->dt_year < STARTOFTIME) || */ (dt->dt_year > 2036))
 220                 return (EINVAL);
 221
 222         return (0);
 223 }
 224
 225 int
 226 a2kusettod(todr_chip_handle_t h, struct clock_ymdhms *dt)
 227 {
 228         struct rtclock2000 *rt;
 229         int ampm, i;
 230
 231         rt = a2kclockaddr;
 232         /*
 233          * there seem to be problems with the bitfield addressing
 234          * currently used..
 235          */
 236         if (! rt)
 237                 return (ENXIO);
 238
 239         /*
 240          * hold clock
 241          */
 242         rt->control1 |= A2CONTROL1_HOLD;
 243         i = 0x1000;
 244         while (rt->control1 & A2CONTROL1_BUSY && i--)
 245                 ;
 246         if (rt->control1 & A2CONTROL1_BUSY)
 247                 return (ENXIO);         /* Give up and say it's not there */
 248
 249         ampm = 0;
 250         if ((rt->control3 & A2CONTROL3_24HMODE) == 0) {
 251                 if (dt->dt_hour >= 12) {
 252                         ampm = A2HOUR1_PM;
 253                         if (dt->dt_hour != 12)
 254                                 dt->dt_hour -= 12;
 255                 } else if (dt->dt_hour == 0) {
 256                         dt->dt_hour = 12;
 257                 }
 258         }
 259         rt->hour1   = (dt->dt_hour / 10) | ampm;
 260         rt->hour2   = dt->dt_hour % 10;
 261         rt->second1 = dt->dt_sec / 10;
 262         rt->second2 = dt->dt_sec % 10;
 263         rt->minute1 = dt->dt_min / 10;
 264         rt->minute2 = dt->dt_min % 10;
 265         rt->day1    = dt->dt_day / 10;
 266         rt->day2    = dt->dt_day % 10;
 267         rt->month1  = dt->dt_mon / 10;
 268         rt->month2  = dt->dt_mon % 10;
 269         rt->year1   = (dt->dt_year / 10) % 10;
 270         rt->year2   = dt->dt_year % 10;
 271         rt->weekday = dt->dt_wday;
 272
 273         /*
 274          * release the clock
 275          */
 276         rt->control2 &= ~A2CONTROL1_HOLD;
 277
 278         return (0);
 279 }