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mcclock_ioasic.c revision 1.23 
      1 /*	$NetBSD: mcclock_ioasic.c,v 1.23 2011/06/04 01:43:56 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 (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 1.23 2011/06/04 01:43:56 tsutsui 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(device_t, cfdata_t, void *);
     45 static void	mcclock_ioasic_attach(device_t, device_t, void *);
     46 
     47 CFATTACH_DECL_NEW(mcclock_ioasic, sizeof (struct mcclock_pad32_softc),
     48     mcclock_ioasic_match, mcclock_ioasic_attach, NULL, NULL);
     49 
     50 static int
     51 mcclock_ioasic_match(device_t parent, cfdata_t cf, void *aux)
     52 {
     53 	struct ioasicdev_attach_args *d = aux;
     54 
     55 	if (strcmp("mc146818", d->iada_modname) != 0)
     56 		return (0);
     57 
     58 	if (tc_badaddr(d->iada_addr))
     59 		return (0);
     60 
     61 	return (1);
     62 }
     63 
     64 static void
     65 mcclock_ioasic_attach(device_t parent, device_t self, void *aux)
     66 {
     67 	struct ioasicdev_attach_args *ioasicdev = aux;
     68 	struct mcclock_pad32_softc *sc = device_private(self);
     69 
     70 	sc->sc_mcclock.sc_dev = self;
     71 	sc->sc_dp = (struct mcclock_pad32_clockdatum *)ioasicdev->iada_addr;
     72 
     73 	/* Attach MI driver, using busfns with TC-style register padding */
     74 	mcclock_attach(&sc->sc_mcclock, &mcclock_pad32_busfns);
     75 }
     76