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mcclock_isa.c revision 1.13 
      1 /* $NetBSD: mcclock_isa.c,v 1.13 2002/10/02 04:06:38 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 1.13 2002/10/02 04:06:38 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 CFATTACH_DECL(mcclock_isa, sizeof (struct mcclock_isa_softc),
     57     mcclock_isa_match, mcclock_isa_attach, NULL, NULL);
     58 
     59 void	mcclock_isa_write __P((struct mcclock_softc *, u_int, u_int));
     60 u_int	mcclock_isa_read __P((struct mcclock_softc *, u_int));
     61 
     62 const struct mcclock_busfns mcclock_isa_busfns = {
     63 	mcclock_isa_write, mcclock_isa_read,
     64 };
     65 
     66 int
     67 mcclock_isa_match(parent, match, aux)
     68 	struct device *parent;
     69 	struct cfdata *match;
     70 	void *aux;
     71 {
     72 	struct isa_attach_args *ia = aux;
     73 	bus_space_handle_t ioh;
     74 
     75 	if (ia->ia_nio < 1 ||
     76 	    (ia->ia_io[0].ir_addr != ISACF_PORT_DEFAULT &&
     77 	     ia->ia_io[0].ir_addr != 0x70))
     78 		return (0);
     79 
     80 	if (ia->ia_niomem > 0 &&
     81 	    (ia->ia_iomem[0].ir_addr != ISACF_IOMEM_DEFAULT))
     82 		return (0);
     83 
     84 	if (ia->ia_nirq > 0 &&
     85 	    (ia->ia_irq[0].ir_irq != ISACF_IRQ_DEFAULT))
     86 		return (0);
     87 
     88 	if (ia->ia_ndrq > 0 &&
     89 	    (ia->ia_drq[0].ir_drq != ISACF_DRQ_DEFAULT))
     90 		return (0);
     91 
     92 	if (bus_space_map(ia->ia_iot, 0x70, 0x2, 0, &ioh))
     93 		return (0);
     94 
     95 	bus_space_unmap(ia->ia_iot, ioh, 0x2);
     96 
     97 	ia->ia_nio = 1;
     98 	ia->ia_io[0].ir_addr = 0x70;
     99 	ia->ia_io[0].ir_size = 0x02;
    100 
    101 	ia->ia_niomem = 0;
    102 	ia->ia_nirq = 0;
    103 	ia->ia_ndrq = 0;
    104 
    105 	return (1);
    106 }
    107 
    108 void
    109 mcclock_isa_attach(parent, self, aux)
    110 	struct device *parent, *self;
    111 	void *aux;
    112 {
    113 	struct isa_attach_args *ia = aux;
    114 	struct mcclock_isa_softc *sc = (struct mcclock_isa_softc *)self;
    115 
    116 	sc->sc_iot = ia->ia_iot;
    117 	if (bus_space_map(sc->sc_iot, ia->ia_io[0].ir_addr,
    118 	    ia->ia_io[0].ir_size, 0, &sc->sc_ioh))
    119 		panic("mcclock_isa_attach: couldn't map clock I/O space");
    120 
    121 	mcclock_attach(&sc->sc_mcclock, &mcclock_isa_busfns);
    122 }
    123 
    124 void
    125 mcclock_isa_write(mcsc, reg, datum)
    126 	struct mcclock_softc *mcsc;
    127 	u_int reg, datum;
    128 {
    129 	struct mcclock_isa_softc *sc = (struct mcclock_isa_softc *)mcsc;
    130 	bus_space_tag_t iot = sc->sc_iot;
    131 	bus_space_handle_t ioh = sc->sc_ioh;
    132 
    133 	bus_space_write_1(iot, ioh, 0, reg);
    134 	bus_space_write_1(iot, ioh, 1, datum);
    135 }
    136 
    137 u_int
    138 mcclock_isa_read(mcsc, reg)
    139 	struct mcclock_softc *mcsc;
    140 	u_int reg;
    141 {
    142 	struct mcclock_isa_softc *sc = (struct mcclock_isa_softc *)mcsc;
    143 	bus_space_tag_t iot = sc->sc_iot;
    144 	bus_space_handle_t ioh = sc->sc_ioh;
    145 
    146 	bus_space_write_1(iot, ioh, 0, reg);
    147 	return bus_space_read_1(iot, ioh, 1);
    148 }
    149