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mcclock_ioasic.c revision 1.3 
      1 /*	$NetBSD: mcclock_ioasic.c,v 1.3 1996/12/05 01:39:42 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 <sys/param.h>
     31 #include <sys/kernel.h>
     32 #include <sys/systm.h>
     33 #include <sys/device.h>
     34 
     35 #include <alpha/alpha/clockvar.h>
     36 #include <alpha/alpha/mcclockvar.h>
     37 #include <dev/ic/mc146818reg.h>
     38 #include <dev/tc/tcreg.h>
     39 #include <dev/tc/tcvar.h>
     40 #include <dev/tc/ioasicvar.h>                   /* XXX */
     41 
     42 struct mcclock_ioasic_clockdatum {
     43 	u_char	datum;
     44 	char	pad[3];
     45 };
     46 
     47 struct mcclock_ioasic_softc {
     48 	struct mcclock_softc	sc_mcclock;
     49 
     50 	struct mcclock_ioasic_clockdatum *sc_dp;
     51 };
     52 
     53 #ifdef __BROKEN_INDIRECT_CONFIG
     54 int	mcclock_ioasic_match __P((struct device *, void *, void *));
     55 #else
     56 int	mcclock_ioasic_match __P((struct device *, struct cfdata *, void *));
     57 #endif
     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 #ifdef __BROKEN_INDIRECT_CONFIG
     76 	void *match;
     77 #else
     78 	struct cfdata *match;
     79 #endif
     80 	void *aux;
     81 {
     82 	struct ioasicdev_attach_args *d = aux;
     83 
     84 	if (strncmp("TOY_RTC ", d->iada_modname, TC_ROM_LLEN))
     85 		return (0);
     86 
     87 	return (1);
     88 }
     89 
     90 void
     91 mcclock_ioasic_attach(parent, self, aux)
     92 	struct device *parent, *self;
     93 	void *aux;
     94 {
     95 	struct ioasicdev_attach_args *ioasicdev = aux;
     96 	struct mcclock_ioasic_softc *sc = (struct mcclock_ioasic_softc *)self;
     97 
     98 	sc->sc_dp = (struct mcclock_ioasic_clockdatum *)ioasicdev->iada_addr;
     99 
    100 	mcclock_attach(&sc->sc_mcclock, &mcclock_ioasic_busfns);
    101 }
    102 
    103 void
    104 mcclock_ioasic_write(dev, reg, datum)
    105 	struct mcclock_softc *dev;
    106 	u_int reg, datum;
    107 {
    108 	struct mcclock_ioasic_softc *sc = (struct mcclock_ioasic_softc *)dev;
    109 
    110 	sc->sc_dp[reg].datum = datum;
    111 }
    112 
    113 u_int
    114 mcclock_ioasic_read(dev, reg)
    115 	struct mcclock_softc *dev;
    116 	u_int reg;
    117 {
    118 	struct mcclock_ioasic_softc *sc = (struct mcclock_ioasic_softc *)dev;
    119 
    120 	return (sc->sc_dp[reg].datum);
    121 }
    122