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mcclock_ioasic.c revision 1.11 
      1 /* $NetBSD: mcclock_ioasic.c,v 1.11 2002/10/02 04:06:40 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_ioasic.c,v 1.11 2002/10/02 04:06:40 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/tcvar.h>
     43 #include <dev/tc/ioasicvar.h>                   /* XXX */
     44 
     45 struct mcclock_ioasic_clockdatum {
     46 	u_char	datum;
     47 	char	pad[3];
     48 };
     49 
     50 struct mcclock_ioasic_softc {
     51 	struct mcclock_softc	sc_mcclock;
     52 
     53 	struct mcclock_ioasic_clockdatum *sc_dp;
     54 };
     55 
     56 int	mcclock_ioasic_match __P((struct device *, struct cfdata *, void *));
     57 void	mcclock_ioasic_attach __P((struct device *, struct device *, void *));
     58 
     59 CFATTACH_DECL(mcclock_ioasic, sizeof (struct mcclock_ioasic_softc),
     60     mcclock_ioasic_match, mcclock_ioasic_attach, NULL, NULL);
     61 
     62 void	mcclock_ioasic_write __P((struct mcclock_softc *, u_int, u_int));
     63 u_int	mcclock_ioasic_read __P((struct mcclock_softc *, u_int));
     64 
     65 const struct mcclock_busfns mcclock_ioasic_busfns = {
     66 	mcclock_ioasic_write, mcclock_ioasic_read,
     67 };
     68 
     69 int
     70 mcclock_ioasic_match(parent, match, aux)
     71 	struct device *parent;
     72 	struct cfdata *match;
     73 	void *aux;
     74 {
     75 	struct ioasicdev_attach_args *d = aux;
     76 
     77 	if (strncmp("TOY_RTC ", d->iada_modname, TC_ROM_LLEN))
     78 		return (0);
     79 
     80 	return (1);
     81 }
     82 
     83 void
     84 mcclock_ioasic_attach(parent, self, aux)
     85 	struct device *parent, *self;
     86 	void *aux;
     87 {
     88 	struct ioasicdev_attach_args *ioasicdev = aux;
     89 	struct mcclock_ioasic_softc *sc = (struct mcclock_ioasic_softc *)self;
     90 
     91 	sc->sc_dp = (struct mcclock_ioasic_clockdatum *)ioasicdev->iada_addr;
     92 
     93 	mcclock_attach(&sc->sc_mcclock, &mcclock_ioasic_busfns);
     94 }
     95 
     96 void
     97 mcclock_ioasic_write(dev, reg, datum)
     98 	struct mcclock_softc *dev;
     99 	u_int reg, datum;
    100 {
    101 	struct mcclock_ioasic_softc *sc = (struct mcclock_ioasic_softc *)dev;
    102 
    103 	sc->sc_dp[reg].datum = datum;
    104 }
    105 
    106 u_int
    107 mcclock_ioasic_read(dev, reg)
    108 	struct mcclock_softc *dev;
    109 	u_int reg;
    110 {
    111 	struct mcclock_ioasic_softc *sc = (struct mcclock_ioasic_softc *)dev;
    112 
    113 	return (sc->sc_dp[reg].datum);
    114 }
    115