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mcclock_pad32.c revision 1.8 
      1 /* $NetBSD: mcclock_pad32.c,v 1.8 1997/09/02 13:20:14 thorpej 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 
     32 __KERNEL_RCSID(0, "$NetBSD: mcclock_pad32.c,v 1.8 1997/09/02 13:20:14 thorpej Exp $");
     33 
     34 #include <sys/param.h>
     35 #include <sys/kernel.h>
     36 #include <sys/systm.h>
     37 #include <sys/device.h>
     38 
     39 #include <dev/dec/clockvar.h>
     40 #include <dev/dec/mcclockvar.h>
     41 #include <dev/ic/mc146818reg.h>
     42 #include <dev/tc/tcreg.h>
     43 #include <dev/tc/tcvar.h>
     44 #include <dev/tc/ioasicvar.h>                   /* XXX */
     45 
     46 struct mcclock_ioasic_clockdatum {
     47 	u_char	datum;
     48 	char	pad[3];
     49 };
     50 
     51 struct mcclock_ioasic_softc {
     52 	struct mcclock_softc	sc_mcclock;
     53 
     54 	struct mcclock_ioasic_clockdatum *sc_dp;
     55 };
     56 
     57 int	mcclock_ioasic_match __P((struct device *, struct cfdata *, void *));
     58 void	mcclock_ioasic_attach __P((struct device *, struct device *, void *));
     59 
     60 struct cfattach mcclock_ioasic_ca = {
     61 	sizeof (struct mcclock_ioasic_softc), mcclock_ioasic_match,
     62 	    mcclock_ioasic_attach,
     63 };
     64 
     65 void	mcclock_ioasic_write __P((struct mcclock_softc *, u_int, u_int));
     66 u_int	mcclock_ioasic_read __P((struct mcclock_softc *, u_int));
     67 
     68 const struct mcclock_busfns mcclock_ioasic_busfns = {
     69 	mcclock_ioasic_write, mcclock_ioasic_read,
     70 };
     71 
     72 int
     73 mcclock_ioasic_match(parent, match, aux)
     74 	struct device *parent;
     75 	struct cfdata *match;
     76 	void *aux;
     77 {
     78 	struct ioasicdev_attach_args *d = aux;
     79 
     80 	if (strncmp("TOY_RTC ", d->iada_modname, TC_ROM_LLEN))
     81 		return (0);
     82 
     83 	return (1);
     84 }
     85 
     86 void
     87 mcclock_ioasic_attach(parent, self, aux)
     88 	struct device *parent, *self;
     89 	void *aux;
     90 {
     91 	struct ioasicdev_attach_args *ioasicdev = aux;
     92 	struct mcclock_ioasic_softc *sc = (struct mcclock_ioasic_softc *)self;
     93 
     94 	sc->sc_dp = (struct mcclock_ioasic_clockdatum *)ioasicdev->iada_addr;
     95 
     96 	mcclock_attach(&sc->sc_mcclock, &mcclock_ioasic_busfns);
     97 }
     98 
     99 void
    100 mcclock_ioasic_write(dev, reg, datum)
    101 	struct mcclock_softc *dev;
    102 	u_int reg, datum;
    103 {
    104 	struct mcclock_ioasic_softc *sc = (struct mcclock_ioasic_softc *)dev;
    105 
    106 	sc->sc_dp[reg].datum = datum;
    107 }
    108 
    109 u_int
    110 mcclock_ioasic_read(dev, reg)
    111 	struct mcclock_softc *dev;
    112 	u_int reg;
    113 {
    114 	struct mcclock_ioasic_softc *sc = (struct mcclock_ioasic_softc *)dev;
    115 
    116 	return (sc->sc_dp[reg].datum);
    117 }
    118