sys/arch/pmax/tc/mcclock_ioasic.c

   1 /*      $NetBSD: mcclock_ioasic.c,v 1.21 2009/03/14 15:36:12 dsl 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>
  31 __KERNEL_RCSID(0, "$NetBSD: mcclock_ioasic.c,v 1.21 2009/03/14 15:36:12 dsl Exp $");
  32
  33 #include <sys/param.h>
  34 #include <sys/device.h>
  35 #include <sys/systm.h>
  36 #include <dev/clock_subr.h>
  37
  38 #include <dev/dec/mcclockvar.h>
  39 #include <dev/dec/mcclock_pad32.h>
  40
  41 #include <dev/tc/tcvar.h>
  42 #include <dev/tc/ioasicvar.h>
  43
  44 static int      mcclock_ioasic_match(struct device *, struct cfdata *,
  45                     void *);
  46 static void     mcclock_ioasic_attach(struct device *, struct device *,
  47                     void *);
  48
  49 CFATTACH_DECL(mcclock_ioasic, sizeof (struct mcclock_pad32_softc),
  50     mcclock_ioasic_match, mcclock_ioasic_attach, NULL, NULL);
  51
  52 static int
  53 mcclock_ioasic_match(struct device *parent, struct cfdata *match, void *aux)
  54 {
  55         struct ioasicdev_attach_args *d = aux;
  56
  57         if (strcmp("mc146818", d->iada_modname) != 0)
  58                 return (0);
  59
  60         if (tc_badaddr(d->iada_addr))
  61                 return (0);
  62
  63         return (1);
  64 }
  65
  66 static void
  67 mcclock_ioasic_attach(struct device *parent, struct device *self, void *aux)
  68 {
  69         struct ioasicdev_attach_args *ioasicdev = aux;
  70         struct mcclock_pad32_softc *sc = (struct mcclock_pad32_softc *)self;
  71
  72         sc->sc_dp = (struct mcclock_pad32_clockdatum *)ioasicdev->iada_addr;
  73
  74         /* Attach MI driver, using busfns with TC-style register padding */
  75         mcclock_attach(&sc->sc_mcclock, &mcclock_pad32_busfns);
  76 }