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Annotation of sys/arch/alpha/isa/mcclock_isa.c, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: mcclock_isa.c,v 1.8 2006/01/02 05:21:24 brad Exp $    */
        !             2: /*     $NetBSD: mcclock_isa.c,v 1.5 1996/12/05 01:39:29 cgd Exp $      */
        !             3:
        !             4: /*
        !             5:  * Copyright (c) 1995, 1996 Carnegie-Mellon University.
        !             6:  * All rights reserved.
        !             7:  *
        !             8:  * Author: Chris G. Demetriou
        !             9:  *
        !            10:  * Permission to use, copy, modify and distribute this software and
        !            11:  * its documentation is hereby granted, provided that both the copyright
        !            12:  * notice and this permission notice appear in all copies of the
        !            13:  * software, derivative works or modified versions, and any portions
        !            14:  * thereof, and that both notices appear in supporting documentation.
        !            15:  *
        !            16:  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
        !            17:  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
        !            18:  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
        !            19:  *
        !            20:  * Carnegie Mellon requests users of this software to return to
        !            21:  *
        !            22:  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
        !            23:  *  School of Computer Science
        !            24:  *  Carnegie Mellon University
        !            25:  *  Pittsburgh PA 15213-3890
        !            26:  *
        !            27:  * any improvements or extensions that they make and grant Carnegie the
        !            28:  * rights to redistribute these changes.
        !            29:  */
        !            30:
        !            31: #include <sys/param.h>
        !            32: #include <sys/kernel.h>
        !            33: #include <sys/systm.h>
        !            34: #include <sys/device.h>
        !            35:
        !            36: #include <machine/bus.h>
        !            37:
        !            38: #include <alpha/alpha/clockvar.h>
        !            39: #include <alpha/alpha/mcclockvar.h>
        !            40: #include <dev/ic/mc146818reg.h>
        !            41: #include <dev/isa/isavar.h>
        !            42:
        !            43: struct mcclock_isa_softc {
        !            44:        struct mcclock_softc    sc_mcclock;
        !            45:
        !            46:        bus_space_tag_t         sc_iot;
        !            47:        bus_space_handle_t      sc_ioh;
        !            48: };
        !            49:
        !            50: int    mcclock_isa_match(struct device *, void *, void *);
        !            51: void   mcclock_isa_attach(struct device *, struct device *, void *);
        !            52:
        !            53: struct cfattach mcclock_isa_ca = {
        !            54:        sizeof (struct mcclock_isa_softc), mcclock_isa_match,
        !            55:            mcclock_isa_attach,
        !            56: };
        !            57:
        !            58: void   mcclock_isa_write(struct mcclock_softc *, u_int, u_int);
        !            59: u_int  mcclock_isa_read(struct mcclock_softc *, u_int);
        !            60:
        !            61: const struct mcclock_busfns mcclock_isa_busfns = {
        !            62:        mcclock_isa_write, mcclock_isa_read,
        !            63: };
        !            64:
        !            65: int
        !            66: mcclock_isa_match(parent, match, aux)
        !            67:        struct device *parent;
        !            68:        void *match;
        !            69:        void *aux;
        !            70: {
        !            71:        struct isa_attach_args *ia = aux;
        !            72:        bus_space_handle_t ioh;
        !            73:
        !            74:         if ((ia->ia_iobase != IOBASEUNK && ia->ia_iobase != 0x70) ||
        !            75:             /* (ia->ia_iosize != 0 && ia->ia_iosize != 0x2) || XXX isa.c */
        !            76:             ia->ia_maddr != MADDRUNK || ia->ia_msize != 0 ||
        !            77:             ia->ia_irq != IRQUNK || ia->ia_drq != DRQUNK)
        !            78:                 return (0);
        !            79:
        !            80:        if (bus_space_map(ia->ia_iot, 0x70, 0x2, 0, &ioh))
        !            81:                return (0);
        !            82:
        !            83:        bus_space_unmap(ia->ia_iot, ioh, 0x2);
        !            84:
        !            85:        ia->ia_iobase = 0x70;
        !            86:        ia->ia_iosize = 0x2;
        !            87:
        !            88:        return (1);
        !            89: }
        !            90:
        !            91: void
        !            92: mcclock_isa_attach(parent, self, aux)
        !            93:        struct device *parent, *self;
        !            94:        void *aux;
        !            95: {
        !            96:        struct isa_attach_args *ia = aux;
        !            97:        struct mcclock_isa_softc *sc = (struct mcclock_isa_softc *)self;
        !            98:
        !            99:        sc->sc_iot = ia->ia_iot;
        !           100:        if (bus_space_map(sc->sc_iot, ia->ia_iobase, ia->ia_iosize, 0,
        !           101:            &sc->sc_ioh))
        !           102:                panic("mcclock_isa_attach: couldn't map clock I/O space");
        !           103:
        !           104:        mcclock_attach(&sc->sc_mcclock, &mcclock_isa_busfns);
        !           105: }
        !           106:
        !           107: void
        !           108: mcclock_isa_write(mcsc, reg, datum)
        !           109:        struct mcclock_softc *mcsc;
        !           110:        u_int reg, datum;
        !           111: {
        !           112:        struct mcclock_isa_softc *sc = (struct mcclock_isa_softc *)mcsc;
        !           113:        bus_space_tag_t iot = sc->sc_iot;
        !           114:        bus_space_handle_t ioh = sc->sc_ioh;
        !           115:
        !           116:        bus_space_write_1(iot, ioh, 0, reg);
        !           117:        bus_space_write_1(iot, ioh, 1, datum);
        !           118: }
        !           119:
        !           120: u_int
        !           121: mcclock_isa_read(mcsc, reg)
        !           122:        struct mcclock_softc *mcsc;
        !           123:        u_int reg;
        !           124: {
        !           125:        struct mcclock_isa_softc *sc = (struct mcclock_isa_softc *)mcsc;
        !           126:        bus_space_tag_t iot = sc->sc_iot;
        !           127:        bus_space_handle_t ioh = sc->sc_ioh;
        !           128:
        !           129:        bus_space_write_1(iot, ioh, 0, reg);
        !           130:        return bus_space_read_1(iot, ioh, 1);
        !           131: }