1 /* $NetBSD: mcclock_ioasic.c,v 1.6 1997/04/07 23:40:54 cgd 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@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 <machine/options.h> /* Config options headers */ 31 #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 32 33 __KERNEL_RCSID(0, "$NetBSD: mcclock_ioasic.c,v 1.6 1997/04/07 23:40:54 cgd Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/kernel.h> 37 #include <sys/systm.h> 38 #include <sys/device.h> 39 40 #include <alpha/alpha/clockvar.h> 41 #include <alpha/alpha/mcclockvar.h> 42 #include <dev/ic/mc146818reg.h> 43 #include <dev/tc/tcreg.h> 44 #include <dev/tc/tcvar.h> 45 #include <dev/tc/ioasicvar.h> /* XXX */ 46 47 struct mcclock_ioasic_clockdatum { 48 u_char datum; 49 char pad[3]; 50 }; 51 52 struct mcclock_ioasic_softc { 53 struct mcclock_softc sc_mcclock; 54 55 struct mcclock_ioasic_clockdatum *sc_dp; 56 }; 57 58 int mcclock_ioasic_match __P((struct device *, struct cfdata *, void *)); 59 void mcclock_ioasic_attach __P((struct device *, struct device *, void *)); 60 61 struct cfattach mcclock_ioasic_ca = { 62 sizeof (struct mcclock_ioasic_softc), mcclock_ioasic_match, 63 mcclock_ioasic_attach, 64 }; 65 66 void mcclock_ioasic_write __P((struct mcclock_softc *, u_int, u_int)); 67 u_int mcclock_ioasic_read __P((struct mcclock_softc *, u_int)); 68 69 const struct mcclock_busfns mcclock_ioasic_busfns = { 70 mcclock_ioasic_write, mcclock_ioasic_read, 71 }; 72 73 int 74 mcclock_ioasic_match(parent, match, aux) 75 struct device *parent; 76 struct cfdata *match; 77 void *aux; 78 { 79 struct ioasicdev_attach_args *d = aux; 80 81 if (strncmp("TOY_RTC ", d->iada_modname, TC_ROM_LLEN)) 82 return (0); 83 84 return (1); 85 } 86 87 void 88 mcclock_ioasic_attach(parent, self, aux) 89 struct device *parent, *self; 90 void *aux; 91 { 92 struct ioasicdev_attach_args *ioasicdev = aux; 93 struct mcclock_ioasic_softc *sc = (struct mcclock_ioasic_softc *)self; 94 95 sc->sc_dp = (struct mcclock_ioasic_clockdatum *)ioasicdev->iada_addr; 96 97 mcclock_attach(&sc->sc_mcclock, &mcclock_ioasic_busfns); 98 } 99 100 void 101 mcclock_ioasic_write(dev, reg, datum) 102 struct mcclock_softc *dev; 103 u_int reg, datum; 104 { 105 struct mcclock_ioasic_softc *sc = (struct mcclock_ioasic_softc *)dev; 106 107 sc->sc_dp[reg].datum = datum; 108 } 109 110 u_int 111 mcclock_ioasic_read(dev, reg) 112 struct mcclock_softc *dev; 113 u_int reg; 114 { 115 struct mcclock_ioasic_softc *sc = (struct mcclock_ioasic_softc *)dev; 116 117 return (sc->sc_dp[reg].datum); 118 } 119