1 /* $NetBSD: mcclock_ioasic.c,v 1.13 2007/10/17 19:52:59 garbled 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 1.13 2007/10/17 19:52:59 garbled 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/clock_subr.h> 42 43 #include <dev/ic/mc146818reg.h> 44 #include <dev/ic/mc146818var.h> 45 #include <dev/tc/tcvar.h> 46 #include <dev/tc/ioasicvar.h> /* XXX */ 47 48 #include <alpha/alpha/mcclockvar.h> 49 50 struct mcclock_ioasic_clockdatum { 51 u_char datum; 52 char pad[3]; 53 }; 54 55 struct mcclock_ioasic_softc { 56 struct mc146818_softc sc_mc146818; 57 58 struct mcclock_ioasic_clockdatum *sc_dp; 59 }; 60 61 int mcclock_ioasic_match(struct device *, struct cfdata *, void *); 62 void mcclock_ioasic_attach(struct device *, struct device *, void *); 63 64 CFATTACH_DECL(mcclock_ioasic, sizeof(struct mcclock_ioasic_softc), 65 mcclock_ioasic_match, mcclock_ioasic_attach, NULL, NULL); 66 67 void mcclock_ioasic_write(struct mc146818_softc *, u_int, u_int); 68 u_int mcclock_ioasic_read(struct mc146818_softc *, u_int); 69 70 int 71 mcclock_ioasic_match(struct device *parent, struct cfdata *match, void *aux) 72 { 73 struct ioasicdev_attach_args *d = aux; 74 75 if (strncmp("TOY_RTC ", d->iada_modname, TC_ROM_LLEN)) 76 return (0); 77 78 return (1); 79 } 80 81 void 82 mcclock_ioasic_attach(struct device *parent, struct device *self, void *aux) 83 { 84 struct ioasicdev_attach_args *ioasicdev = aux; 85 struct mcclock_ioasic_softc *isc = (void *)self; 86 struct mc146818_softc *sc = &isc->sc_mc146818; 87 88 /* XXX no bus_space(9) for TURBOchannel yet */ 89 isc->sc_dp = (void *)ioasicdev->iada_addr; 90 91 sc->sc_mcread = mcclock_ioasic_read; 92 sc->sc_mcwrite = mcclock_ioasic_write; 93 94 /* call alpha common mcclock attachment */ 95 mcclock_attach(sc); 96 } 97 98 void 99 mcclock_ioasic_write(struct mc146818_softc *sc, u_int reg, u_int datum) 100 { 101 struct mcclock_ioasic_softc *isc = (void *)sc; 102 103 isc->sc_dp[reg].datum = datum; 104 } 105 106 u_int 107 mcclock_ioasic_read(struct mc146818_softc *sc, u_int reg) 108 { 109 struct mcclock_ioasic_softc *isc = (void *)sc; 110 111 return isc->sc_dp[reg].datum; 112 } 113