1 /* $NetBSD: mcclock_ioasic.c,v 1.11 2002/10/02 04:06:40 thorpej 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 <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 31 32 __KERNEL_RCSID(0, "$NetBSD: mcclock_ioasic.c,v 1.11 2002/10/02 04:06:40 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 <dev/dec/clockvar.h> 40 #include <dev/dec/mcclockvar.h> 41 #include <dev/ic/mc146818reg.h> 42 #include <dev/tc/tcvar.h> 43 #include <dev/tc/ioasicvar.h> /* XXX */ 44 45 struct mcclock_ioasic_clockdatum { 46 u_char datum; 47 char pad[3]; 48 }; 49 50 struct mcclock_ioasic_softc { 51 struct mcclock_softc sc_mcclock; 52 53 struct mcclock_ioasic_clockdatum *sc_dp; 54 }; 55 56 int mcclock_ioasic_match __P((struct device *, struct cfdata *, void *)); 57 void mcclock_ioasic_attach __P((struct device *, struct device *, void *)); 58 59 CFATTACH_DECL(mcclock_ioasic, sizeof (struct mcclock_ioasic_softc), 60 mcclock_ioasic_match, mcclock_ioasic_attach, NULL, NULL); 61 62 void mcclock_ioasic_write __P((struct mcclock_softc *, u_int, u_int)); 63 u_int mcclock_ioasic_read __P((struct mcclock_softc *, u_int)); 64 65 const struct mcclock_busfns mcclock_ioasic_busfns = { 66 mcclock_ioasic_write, mcclock_ioasic_read, 67 }; 68 69 int 70 mcclock_ioasic_match(parent, match, aux) 71 struct device *parent; 72 struct cfdata *match; 73 void *aux; 74 { 75 struct ioasicdev_attach_args *d = aux; 76 77 if (strncmp("TOY_RTC ", d->iada_modname, TC_ROM_LLEN)) 78 return (0); 79 80 return (1); 81 } 82 83 void 84 mcclock_ioasic_attach(parent, self, aux) 85 struct device *parent, *self; 86 void *aux; 87 { 88 struct ioasicdev_attach_args *ioasicdev = aux; 89 struct mcclock_ioasic_softc *sc = (struct mcclock_ioasic_softc *)self; 90 91 sc->sc_dp = (struct mcclock_ioasic_clockdatum *)ioasicdev->iada_addr; 92 93 mcclock_attach(&sc->sc_mcclock, &mcclock_ioasic_busfns); 94 } 95 96 void 97 mcclock_ioasic_write(dev, reg, datum) 98 struct mcclock_softc *dev; 99 u_int reg, datum; 100 { 101 struct mcclock_ioasic_softc *sc = (struct mcclock_ioasic_softc *)dev; 102 103 sc->sc_dp[reg].datum = datum; 104 } 105 106 u_int 107 mcclock_ioasic_read(dev, reg) 108 struct mcclock_softc *dev; 109 u_int reg; 110 { 111 struct mcclock_ioasic_softc *sc = (struct mcclock_ioasic_softc *)dev; 112 113 return (sc->sc_dp[reg].datum); 114 } 115