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: }
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