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mcclock_pad32.c revision 1.5 
      1 /* $NetBSD: mcclock_pad32.c,v 1.5 1997/04/06 22:31:52 cgd 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 <machine/options.h>		/* Pull in config options headers */
     31 
     32 #include <sys/param.h>
     33 #include <sys/kernel.h>
     34 #include <sys/systm.h>
     35 #include <sys/device.h>
     36 
     37 #include <alpha/alpha/clockvar.h>
     38 #include <alpha/alpha/mcclockvar.h>
     39 #include <dev/ic/mc146818reg.h>
     40 #include <dev/tc/tcreg.h>
     41 #include <dev/tc/tcvar.h>
     42 #include <dev/tc/ioasicvar.h>                   /* XXX */
     43 
     44 struct mcclock_ioasic_clockdatum {
     45 	u_char	datum;
     46 	char	pad[3];
     47 };
     48 
     49 struct mcclock_ioasic_softc {
     50 	struct mcclock_softc	sc_mcclock;
     51 
     52 	struct mcclock_ioasic_clockdatum *sc_dp;
     53 };
     54 
     55 int	mcclock_ioasic_match __P((struct device *, struct cfdata *, void *));
     56 void	mcclock_ioasic_attach __P((struct device *, struct device *, void *));
     57 
     58 struct cfattach mcclock_ioasic_ca = {
     59 	sizeof (struct mcclock_ioasic_softc), mcclock_ioasic_match,
     60 	    mcclock_ioasic_attach,
     61 };
     62 
     63 void	mcclock_ioasic_write __P((struct mcclock_softc *, u_int, u_int));
     64 u_int	mcclock_ioasic_read __P((struct mcclock_softc *, u_int));
     65 
     66 const struct mcclock_busfns mcclock_ioasic_busfns = {
     67 	mcclock_ioasic_write, mcclock_ioasic_read,
     68 };
     69 
     70 int
     71 mcclock_ioasic_match(parent, match, aux)
     72 	struct device *parent;
     73 	struct cfdata *match;
     74 	void *aux;
     75 {
     76 	struct ioasicdev_attach_args *d = aux;
     77 
     78 	if (strncmp("TOY_RTC ", d->iada_modname, TC_ROM_LLEN))
     79 		return (0);
     80 
     81 	return (1);
     82 }
     83 
     84 void
     85 mcclock_ioasic_attach(parent, self, aux)
     86 	struct device *parent, *self;
     87 	void *aux;
     88 {
     89 	struct ioasicdev_attach_args *ioasicdev = aux;
     90 	struct mcclock_ioasic_softc *sc = (struct mcclock_ioasic_softc *)self;
     91 
     92 	sc->sc_dp = (struct mcclock_ioasic_clockdatum *)ioasicdev->iada_addr;
     93 
     94 	mcclock_attach(&sc->sc_mcclock, &mcclock_ioasic_busfns);
     95 }
     96 
     97 void
     98 mcclock_ioasic_write(dev, reg, datum)
     99 	struct mcclock_softc *dev;
    100 	u_int reg, datum;
    101 {
    102 	struct mcclock_ioasic_softc *sc = (struct mcclock_ioasic_softc *)dev;
    103 
    104 	sc->sc_dp[reg].datum = datum;
    105 }
    106 
    107 u_int
    108 mcclock_ioasic_read(dev, reg)
    109 	struct mcclock_softc *dev;
    110 	u_int reg;
    111 {
    112 	struct mcclock_ioasic_softc *sc = (struct mcclock_ioasic_softc *)dev;
    113 
    114 	return (sc->sc_dp[reg].datum);
    115 }
    116