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      1 /*	$NetBSD: mcclock_ibus.c,v 1.19 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>			/* RCS ID & Copyright macro defns */
     31 __KERNEL_RCSID(0, "$NetBSD: mcclock_ibus.c,v 1.19 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/kernel.h>
     37 #include <sys/systm.h>
     38 
     39 #include <dev/clock_subr.h>
     40 
     41 #include <dev/dec/mcclockvar.h>
     42 #include <dev/dec/mcclock_pad32.h>
     43 
     44 #include <pmax/ibus/ibusvar.h>
     45 
     46 static int	mcclock_ibus_match(device_t, cfdata_t, void *);
     47 static void	mcclock_ibus_attach(device_t, device_t, void *);
     48 
     49 CFATTACH_DECL_NEW(mcclock_ibus, sizeof (struct mcclock_pad32_softc),
     50     mcclock_ibus_match, mcclock_ibus_attach, NULL, NULL);
     51 
     52 static int
     53 mcclock_ibus_match(device_t parent, cfdata_t cf, void *aux)
     54 {
     55 	struct ibus_attach_args *ia = aux;
     56 
     57 	if (strcmp("mc146818", ia->ia_name) != 0)
     58 		return (0);
     59 
     60 	if (badaddr((void *)ia->ia_addr, sizeof(uint32_t)))
     61 		return (0);
     62 
     63 	return (1);
     64 }
     65 
     66 static void
     67 mcclock_ibus_attach(device_t parent, device_t self, void *aux)
     68 {
     69 	struct ibus_attach_args *ia = aux;
     70 	struct mcclock_pad32_softc *sc = device_private(self);
     71 
     72 	sc->sc_mcclock.sc_dev = self;
     73 	sc->sc_dp = (struct mcclock_pad32_clockdatum*)ia->ia_addr;
     74 
     75 	/* Attach MI driver, using busfns with TC-style register padding */
     76 	mcclock_attach(&sc->sc_mcclock, &mcclock_pad32_busfns);
     77 }
     78