1 /* $NetBSD: mcclock_ioasic.c,v 1.1 1997/06/22 09:34:50 jonathan 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 1.1 1997/06/22 09:34:50 jonathan 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/autoconf.h> 40 #include <dev/tc/clockvar.h> 41 #include <dev/tc/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), (void *)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 volatile struct chiptime *Mach_clock_addr; /* XXX glue for pmax heritage */ 74 75 int 76 mcclock_ioasic_match(parent, match, aux) 77 struct device *parent; 78 struct cfdata *match; 79 void *aux; 80 { 81 #define CFMATCH(cf,x) !strcmp((cf)->dv_cfdata->cf_driver->cd_name,(x)) 82 char *name; 83 vm_offset_t addr; 84 85 if (CFMATCH(parent, "mainbus")) { 86 struct confargs *ca = aux; 87 addr = (vm_offset_t)ca->ca_addr; 88 name = ca->ca_name; 89 } 90 else 91 if (CFMATCH(parent, "asic")) { 92 struct ioasicdev_attach_args *d = aux; 93 addr = d->iada_addr; 94 name = d->iada_modname; 95 } 96 else { 97 /*panic("clock must be attached with mainbus or ioasic\n");*/ 98 printf("clock on %s: must be attached at mainbus or ioasic\n", 99 parent->dv_cfdata->cf_driver->cd_name); 100 return(0); 101 } 102 if (strcmp("mc146818", name)) 103 return (0); 104 Mach_clock_addr = (struct chiptime *)MIPS_PHYS_TO_KSEG1(addr); 105 return (1); 106 #undef CFMATCH 107 } 108 109 void 110 mcclock_ioasic_attach(parent, self, aux) 111 struct device *parent, *self; 112 void *aux; 113 { 114 struct ioasicdev_attach_args *ioasicdev = aux; 115 struct mcclock_ioasic_softc *sc = (struct mcclock_ioasic_softc *)self; 116 117 sc->sc_dp = (struct mcclock_ioasic_clockdatum *)ioasicdev->iada_addr; 118 119 mcclock_attach(&sc->sc_mcclock, &mcclock_ioasic_busfns); 120 } 121 122 void 123 mcclock_ioasic_write(dev, reg, datum) 124 struct mcclock_softc *dev; 125 u_int reg, datum; 126 { 127 struct mcclock_ioasic_softc *sc = (struct mcclock_ioasic_softc *)dev; 128 129 sc->sc_dp[reg].datum = datum; 130 } 131 132 u_int 133 mcclock_ioasic_read(dev, reg) 134 struct mcclock_softc *dev; 135 u_int reg; 136 { 137 struct mcclock_ioasic_softc *sc = (struct mcclock_ioasic_softc *)dev; 138 139 return (sc->sc_dp[reg].datum); 140 } 141 142 /*XXX*/ 143 /* 144 * Wait "n" microseconds. (scsi code needs this). 145 */ 146 void 147 delay(n) 148 int n; 149 { 150 DELAY(n); 151 } 152