sys/arch/x68k/dev/rtclock.c

   1 /*      $NetBSD: rtclock.c,v 1.22 2008/06/25 08:14:59 isaki Exp $       */
   2
   3 /*
   4  * Copyright 1993, 1994 Masaru Oki
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. All advertising materials mentioning features or use of this software
  16  *    must display the following acknowledgement:
  17  *      This product includes software developed by Masaru Oki.
  18  * 4. The name of the author may not be used to endorse or promote products
  19  *    derived from this software without specific prior written permission
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  22  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  23  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  24  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  26  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  30  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 /*
  34  * X680x0 internal real time clock interface
  35  * alarm is not supported.
  36  */
  37
  38 #include <sys/cdefs.h>
  39 __KERNEL_RCSID(0, "$NetBSD: rtclock.c,v 1.22 2008/06/25 08:14:59 isaki Exp $");
  40
  41 #include <sys/param.h>
  42 #include <sys/systm.h>
  43 #include <sys/buf.h>
  44 #include <sys/malloc.h>
  45 #include <sys/proc.h>
  46 #include <sys/reboot.h>
  47 #include <sys/file.h>
  48 #include <sys/kernel.h>
  49 #include <sys/device.h>
  50
  51 #include <machine/bus.h>
  52
  53 #include <dev/clock_subr.h>
  54
  55 #include <arch/x68k/dev/rtclock_var.h>
  56 #include <arch/x68k/dev/intiovar.h>
  57
  58 static int rtgettod(todr_chip_handle_t, struct clock_ymdhms *);
  59 static int rtsettod(todr_chip_handle_t, struct clock_ymdhms *);
  60
  61 static int rtc_match(device_t, cfdata_t, void *);
  62 static void rtc_attach(device_t, device_t, void *);
  63
  64 CFATTACH_DECL_NEW(rtc, sizeof(struct rtc_softc),
  65     rtc_match, rtc_attach, NULL, NULL);
  66
  67 static int rtc_attached;
  68
  69 static int
  70 rtc_match(device_t parent, cfdata_t cf, void *aux)
  71 {
  72         struct intio_attach_args *ia = aux;
  73
  74         if (strcmp(ia->ia_name, "rtc") != 0)
  75                 return (0);
  76         if (rtc_attached)
  77                 return (0);
  78
  79         /* fixed address */
  80         if (ia->ia_addr != RTC_ADDR)
  81                 return (0);
  82         if (ia->ia_intr != -1)
  83                 return (0);
  84
  85         return (1);
  86 }
  87
  88 static void
  89 rtc_attach(device_t parent, device_t self, void *aux)
  90 {
  91         struct rtc_softc *sc = device_private(self);
  92         struct intio_attach_args *ia = aux;
  93         int r;
  94
  95         rtc_attached = 1;
  96
  97         ia->ia_size = 0x20;
  98         r = intio_map_allocate_region(parent, ia, INTIO_MAP_ALLOCATE);
  99 #ifdef DIAGNOSTIC
 100         if (r)
 101                 panic("IO map for RTC corruption??");
 102 #endif
 103
 104
 105         sc->sc_bst = ia->ia_bst;
 106         bus_space_map(sc->sc_bst, ia->ia_addr, 0x2000, 0, &sc->sc_bht);
 107
 108         sc->sc_todr.cookie = sc;
 109         sc->sc_todr.todr_gettime_ymdhms = rtgettod;
 110         sc->sc_todr.todr_settime_ymdhms = rtsettod;
 111         todr_attach(&sc->sc_todr);
 112
 113         aprint_normal(": RP5C15\n");
 114 }
 115
 116 static int
 117 rtgettod(todr_chip_handle_t tch, struct clock_ymdhms *dt)
 118 {
 119         struct rtc_softc *rtc = tch->cookie;
 120
 121         /* hold clock */
 122         RTC_WRITE(RTC_MODE, RTC_HOLD_CLOCK);
 123
 124         /* read it */
 125         dt->dt_sec  = RTC_REG(RTC_SEC10)  * 10 + RTC_REG(RTC_SEC);
 126         dt->dt_min  = RTC_REG(RTC_MIN10)  * 10 + RTC_REG(RTC_MIN);
 127         dt->dt_hour = RTC_REG(RTC_HOUR10) * 10 + RTC_REG(RTC_HOUR);
 128         dt->dt_day  = RTC_REG(RTC_DAY10)  * 10 + RTC_REG(RTC_DAY);
 129         dt->dt_mon  = RTC_REG(RTC_MON10)  * 10 + RTC_REG(RTC_MON);
 130         dt->dt_year = RTC_REG(RTC_YEAR10) * 10 + RTC_REG(RTC_YEAR)
 131                                                         +RTC_BASE_YEAR;
 132
 133         /* let it run again.. */
 134         RTC_WRITE(RTC_MODE, RTC_FREE_CLOCK);
 135
 136         return 0;
 137 }
 138
 139 static int
 140 rtsettod(todr_chip_handle_t tch, struct clock_ymdhms *dt)
 141 {
 142         struct rtc_softc *rtc = tch->cookie;
 143         u_char sec1, sec2;
 144         u_char min1, min2;
 145         u_char hour1, hour2;
 146         u_char day1, day2;
 147         u_char mon1, mon2;
 148         u_char year1, year2;
 149
 150         /* prepare values to be written to clock */
 151         sec1  = dt->dt_sec  / 10;
 152         sec2  = dt->dt_sec  % 10;
 153         min1  = dt->dt_min  / 10;
 154         min2  = dt->dt_min  % 10;
 155         hour1 = dt->dt_hour / 10;
 156         hour2 = dt->dt_hour % 10;
 157
 158         day1  = dt->dt_day  / 10;
 159         day2  = dt->dt_day  % 10;
 160         mon1  = dt->dt_mon  / 10;
 161         mon2  = dt->dt_mon  % 10;
 162         year1 = (dt->dt_year - RTC_BASE_YEAR) / 10;
 163         year2 = dt->dt_year % 10;
 164
 165         RTC_WRITE(RTC_MODE,   RTC_HOLD_CLOCK);
 166         RTC_WRITE(RTC_SEC10,  sec1);
 167         RTC_WRITE(RTC_SEC,    sec2);
 168         RTC_WRITE(RTC_MIN10,  min1);
 169         RTC_WRITE(RTC_MIN,    min2);
 170         RTC_WRITE(RTC_HOUR10, hour1);
 171         RTC_WRITE(RTC_HOUR,   hour2);
 172         RTC_WRITE(RTC_DAY10,  day1);
 173         RTC_WRITE(RTC_DAY,    day2);
 174         RTC_WRITE(RTC_MON10,  mon1);
 175         RTC_WRITE(RTC_MON,    mon2);
 176         RTC_WRITE(RTC_YEAR10, year1);
 177         RTC_WRITE(RTC_YEAR,   year2);
 178         RTC_WRITE(RTC_MODE,   RTC_FREE_CLOCK);
 179
 180         return 0;
 181 }