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mcclock_ioasic.c revision 1.19 
      1 /*	$NetBSD: mcclock_ioasic.c,v 1.19 2008/01/03 23:02:25 joerg 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 (at) 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 1.19 2008/01/03 23:02:25 joerg 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 __P((struct device *, struct cfdata *,
     45 		    void *));
     46 static void	mcclock_ioasic_attach __P((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(parent, match, aux)
     54 	struct device *parent;
     55 	struct cfdata *match;
     56 	void *aux;
     57 {
     58 	struct ioasicdev_attach_args *d = aux;
     59 
     60 	if (strcmp("mc146818", d->iada_modname) != 0)
     61 		return (0);
     62 
     63 	if (tc_badaddr(d->iada_addr))
     64 		return (0);
     65 
     66 	return (1);
     67 }
     68 
     69 static void
     70 mcclock_ioasic_attach(parent, self, aux)
     71 	struct device *parent, *self;
     72 	void *aux;
     73 {
     74 	struct ioasicdev_attach_args *ioasicdev = aux;
     75 	struct mcclock_pad32_softc *sc = (struct mcclock_pad32_softc *)self;
     76 
     77 	sc->sc_dp = (struct mcclock_pad32_clockdatum *)ioasicdev->iada_addr;
     78 
     79 	/* Attach MI driver, using busfns with TC-style register padding */
     80 	mcclock_attach(&sc->sc_mcclock, &mcclock_pad32_busfns);
     81 }
     82