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      1 /*	$NetBSD: mcclock_ioasic.c,v 1.24 2015/06/09 20:23:53 matt 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 1.24 2015/06/09 20:23:53 matt Exp $");
     32 
     33 #include <sys/param.h>
     34 #include <sys/cpu.h>
     35 #include <sys/device.h>
     36 #include <sys/systm.h>
     37 #include <dev/clock_subr.h>
     38 
     39 #include <dev/dec/mcclockvar.h>
     40 #include <dev/dec/mcclock_pad32.h>
     41 
     42 #include <dev/tc/tcvar.h>
     43 #include <dev/tc/ioasicvar.h>
     44 
     45 static int	mcclock_ioasic_match(device_t, cfdata_t, void *);
     46 static void	mcclock_ioasic_attach(device_t, device_t, void *);
     47 
     48 CFATTACH_DECL_NEW(mcclock_ioasic, sizeof (struct mcclock_pad32_softc),
     49     mcclock_ioasic_match, mcclock_ioasic_attach, NULL, NULL);
     50 
     51 static int
     52 mcclock_ioasic_match(device_t parent, cfdata_t cf, void *aux)
     53 {
     54 	struct ioasicdev_attach_args *d = aux;
     55 
     56 	if (strcmp("mc146818", d->iada_modname) != 0)
     57 		return (0);
     58 
     59 	if (tc_badaddr(d->iada_addr))
     60 		return (0);
     61 
     62 	return (1);
     63 }
     64 
     65 static void
     66 mcclock_ioasic_attach(device_t parent, device_t self, void *aux)
     67 {
     68 	struct ioasicdev_attach_args *ioasicdev = aux;
     69 	struct mcclock_pad32_softc *sc = device_private(self);
     70 
     71 	sc->sc_mcclock.sc_dev = self;
     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 }
     77