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mcclock_isa.c revision 1.9.2.1 
      1 /* $NetBSD: mcclock_isa.c,v 1.9.2.1 1997/09/04 00:53:15 thorpej Exp $ */
      2 
      3 /*
      4  * Copyright (c) 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_isa.c,v 1.9.2.1 1997/09/04 00:53:15 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 <machine/bus.h>
     40 
     41 #include <dev/dec/clockvar.h>
     42 #include <dev/dec/mcclockvar.h>
     43 #include <dev/ic/mc146818reg.h>
     44 #include <dev/isa/isavar.h>
     45 
     46 struct mcclock_isa_softc {
     47 	struct mcclock_softc	sc_mcclock;
     48 
     49 	bus_space_tag_t		sc_iot;
     50 	bus_space_handle_t	sc_ioh;
     51 };
     52 
     53 int	mcclock_isa_match __P((struct device *, struct cfdata *, void *));
     54 void	mcclock_isa_attach __P((struct device *, struct device *, void *));
     55 
     56 struct cfattach mcclock_isa_ca = {
     57 	sizeof (struct mcclock_isa_softc), mcclock_isa_match,
     58 	    mcclock_isa_attach,
     59 };
     60 
     61 void	mcclock_isa_write __P((struct mcclock_softc *, u_int, u_int));
     62 u_int	mcclock_isa_read __P((struct mcclock_softc *, u_int));
     63 
     64 const struct mcclock_busfns mcclock_isa_busfns = {
     65 	mcclock_isa_write, mcclock_isa_read,
     66 };
     67 
     68 int
     69 mcclock_isa_match(parent, match, aux)
     70 	struct device *parent;
     71 	struct cfdata *match;
     72 	void *aux;
     73 {
     74 	struct isa_attach_args *ia = aux;
     75 	bus_space_handle_t ioh;
     76 
     77         if ((ia->ia_iobase != IOBASEUNK && ia->ia_iobase != 0x70) ||
     78             /* (ia->ia_iosize != 0 && ia->ia_iosize != 0x2) || XXX isa.c */
     79             ia->ia_maddr != MADDRUNK || ia->ia_msize != 0 ||
     80             ia->ia_irq != IRQUNK || ia->ia_drq != DRQUNK)
     81                 return (0);
     82 
     83 	if (bus_space_map(ia->ia_iot, 0x70, 0x2, 0, &ioh))
     84 		return (0);
     85 
     86 	bus_space_unmap(ia->ia_iot, ioh, 0x2);
     87 
     88 	ia->ia_iobase = 0x70;
     89 	ia->ia_iosize = 0x2;
     90 
     91 	return (1);
     92 }
     93 
     94 void
     95 mcclock_isa_attach(parent, self, aux)
     96 	struct device *parent, *self;
     97 	void *aux;
     98 {
     99 	struct isa_attach_args *ia = aux;
    100 	struct mcclock_isa_softc *sc = (struct mcclock_isa_softc *)self;
    101 
    102 	sc->sc_iot = ia->ia_iot;
    103 	if (bus_space_map(sc->sc_iot, ia->ia_iobase, ia->ia_iosize, 0,
    104 	    &sc->sc_ioh))
    105 		panic("mcclock_isa_attach: couldn't map clock I/O space");
    106 
    107 	mcclock_attach(&sc->sc_mcclock, &mcclock_isa_busfns);
    108 }
    109 
    110 void
    111 mcclock_isa_write(mcsc, reg, datum)
    112 	struct mcclock_softc *mcsc;
    113 	u_int reg, datum;
    114 {
    115 	struct mcclock_isa_softc *sc = (struct mcclock_isa_softc *)mcsc;
    116 	bus_space_tag_t iot = sc->sc_iot;
    117 	bus_space_handle_t ioh = sc->sc_ioh;
    118 
    119 	bus_space_write_1(iot, ioh, 0, reg);
    120 	bus_space_write_1(iot, ioh, 1, datum);
    121 }
    122 
    123 u_int
    124 mcclock_isa_read(mcsc, reg)
    125 	struct mcclock_softc *mcsc;
    126 	u_int reg;
    127 {
    128 	struct mcclock_isa_softc *sc = (struct mcclock_isa_softc *)mcsc;
    129 	bus_space_tag_t iot = sc->sc_iot;
    130 	bus_space_handle_t ioh = sc->sc_ioh;
    131 
    132 	bus_space_write_1(iot, ioh, 0, reg);
    133 	return bus_space_read_1(iot, ioh, 1);
    134 }
    135