sys/arch/alpha/tc/mcclock_ioasic.c

   1 /* $NetBSD: mcclock_ioasic.c,v 1.14 2008/03/28 19:05:49 tsutsui Exp $ */
   2
   3 /*
   4  * Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
   5  * All rights reserved.
   6  *
   7  * Author: Chris G. Demetriou
   8  *
   9  * Permission to use, copy, modify and distribute this software and
  10  * its documentation is hereby granted, provided that both the copyright
  11  * notice and this permission notice appear in all copies of the
  12  * software, derivative works or modified versions, and any portions
  13  * thereof, and that both notices appear in supporting documentation.
  14  *
  15  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  16  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
  17  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  18  *
  19  * Carnegie Mellon requests users of this software to return to
  20  *
  21  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  22  *  School of Computer Science
  23  *  Carnegie Mellon University
  24  *  Pittsburgh PA 15213-3890
  25  *
  26  * any improvements or extensions that they make and grant Carnegie the
  27  * rights to redistribute these changes.
  28  */
  29
  30 #include <sys/cdefs.h>                  /* RCS ID & Copyright macro defns */
  31
  32 __KERNEL_RCSID(0, "$NetBSD: mcclock_ioasic.c,v 1.14 2008/03/28 19:05:49 tsutsui Exp $");
  33
  34 #include <sys/param.h>
  35 #include <sys/kernel.h>
  36 #include <sys/systm.h>
  37 #include <sys/device.h>
  38
  39 #include <machine/bus.h>
  40
  41 #include <dev/clock_subr.h>
  42
  43 #include <dev/ic/mc146818reg.h>
  44 #include <dev/ic/mc146818var.h>
  45 #include <dev/tc/tcvar.h>
  46 #include <dev/tc/ioasicvar.h>                   /* XXX */
  47
  48 #include <alpha/alpha/mcclockvar.h>
  49
  50 struct mcclock_ioasic_clockdatum {
  51         u_char  datum;
  52         char    pad[3];
  53 };
  54
  55 struct mcclock_ioasic_softc {
  56         struct mc146818_softc   sc_mc146818;
  57
  58         struct mcclock_ioasic_clockdatum *sc_dp;
  59 };
  60
  61 int     mcclock_ioasic_match(device_t, cfdata_t, void *);
  62 void    mcclock_ioasic_attach(device_t, device_t, void *);
  63
  64 CFATTACH_DECL_NEW(mcclock_ioasic, sizeof(struct mcclock_ioasic_softc),
  65     mcclock_ioasic_match, mcclock_ioasic_attach, NULL, NULL);
  66
  67 void    mcclock_ioasic_write(struct mc146818_softc *, u_int, u_int);
  68 u_int   mcclock_ioasic_read(struct mc146818_softc *, u_int);
  69
  70 int
  71 mcclock_ioasic_match(device_t parent, cfdata_t cf, void *aux)
  72 {
  73         struct ioasicdev_attach_args *d = aux;
  74
  75         if (strncmp("TOY_RTC ", d->iada_modname, TC_ROM_LLEN))
  76                 return (0);
  77
  78         return (1);
  79 }
  80
  81 void
  82 mcclock_ioasic_attach(device_t parent, device_t self, void *aux)
  83 {
  84         struct mcclock_ioasic_softc *isc = device_private(self);
  85         struct ioasicdev_attach_args *ioasicdev = aux;
  86         struct mc146818_softc *sc = &isc->sc_mc146818;
  87
  88         /* XXX no bus_space(9) for TURBOchannel yet */
  89         isc->sc_dp = (void *)ioasicdev->iada_addr;
  90
  91         sc->sc_dev = self;
  92         sc->sc_mcread = mcclock_ioasic_read;
  93         sc->sc_mcwrite = mcclock_ioasic_write;
  94
  95         /* call alpha common mcclock attachment */
  96         mcclock_attach(sc);
  97 }
  98
  99 void
 100 mcclock_ioasic_write(struct mc146818_softc *sc, u_int reg, u_int datum)
 101 {
 102         struct mcclock_ioasic_softc *isc = (void *)sc;
 103
 104         isc->sc_dp[reg].datum = datum;
 105 }
 106
 107 u_int
 108 mcclock_ioasic_read(struct mc146818_softc *sc, u_int reg)
 109 {
 110         struct mcclock_ioasic_softc *isc = (void *)sc;
 111
 112         return isc->sc_dp[reg].datum;
 113 }