1 /* $NetBSD: mcclock_isa.c,v 1.2 2002/04/09 03:40:16 simonb Exp $ */ 2 3 /* 4 * Copyright (c) 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_isa.c,v 1.2 2002/04/09 03:40:16 simonb 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/ic/mc146818reg.h> 42 43 #include <evbmips/evbmips/clockvar.h> 44 #include <evbmips/dev/mcclockvar.h> 45 46 #include <dev/isa/isareg.h> 47 #include <dev/isa/isavar.h> 48 49 struct mcclock_isa_softc { 50 struct mcclock_softc sc_mcclock; 51 52 bus_space_tag_t sc_iot; 53 bus_space_handle_t sc_ioh; 54 }; 55 56 static int mcclock_isa_match(struct device *, struct cfdata *, void *); 57 static void mcclock_isa_attach(struct device *, struct device *, void *); 58 59 struct cfattach mcclock_isa_ca = { 60 sizeof (struct mcclock_isa_softc), mcclock_isa_match, 61 mcclock_isa_attach, 62 }; 63 64 static void mcclock_isa_write(struct mcclock_softc *, u_int, u_int); 65 static u_int mcclock_isa_read(struct mcclock_softc *, u_int); 66 67 const struct mcclock_busfns mcclock_isa_busfns = { 68 mcclock_isa_write, mcclock_isa_read, 69 }; 70 71 static int 72 mcclock_isa_match(struct device *parent, struct cfdata *match, void *aux) 73 { 74 struct isa_attach_args *ia = aux; 75 bus_space_handle_t ioh; 76 77 if (ia->ia_nio < 1 || 78 (ia->ia_io[0].ir_addr != ISACF_PORT_DEFAULT && 79 ia->ia_io[0].ir_addr != IO_RTC)) 80 return (0); 81 82 if (ia->ia_niomem > 0 && 83 (ia->ia_iomem[0].ir_addr != ISACF_IOMEM_DEFAULT)) 84 return (0); 85 86 if (ia->ia_nirq > 0 && 87 (ia->ia_irq[0].ir_irq != ISACF_IRQ_DEFAULT)) 88 return (0); 89 90 if (ia->ia_ndrq > 0 && 91 (ia->ia_drq[0].ir_drq != ISACF_DRQ_DEFAULT)) 92 return (0); 93 94 if (bus_space_map(ia->ia_iot, IO_RTC, 0x2, 0, &ioh)) 95 return (0); 96 97 bus_space_unmap(ia->ia_iot, ioh, 0x2); 98 99 ia->ia_nio = 1; 100 ia->ia_io[0].ir_addr = IO_RTC; 101 ia->ia_io[0].ir_size = 0x02; 102 103 ia->ia_niomem = 0; 104 ia->ia_nirq = 0; 105 ia->ia_ndrq = 0; 106 107 return (1); 108 } 109 110 static void 111 mcclock_isa_attach(struct device *parent, struct device *self, void *aux) 112 { 113 struct isa_attach_args *ia = aux; 114 struct mcclock_isa_softc *sc = (struct mcclock_isa_softc *)self; 115 116 sc->sc_iot = ia->ia_iot; 117 if (bus_space_map(sc->sc_iot, ia->ia_io[0].ir_addr, 118 ia->ia_io[0].ir_size, 0, &sc->sc_ioh)) 119 panic("mcclock_isa_attach: couldn't map clock I/O space"); 120 121 mcclock_attach(&sc->sc_mcclock, &mcclock_isa_busfns); 122 } 123 124 static void 125 mcclock_isa_write(struct mcclock_softc *mcsc, u_int reg, u_int datum) 126 { 127 struct mcclock_isa_softc *sc = (struct mcclock_isa_softc *)mcsc; 128 bus_space_tag_t iot = sc->sc_iot; 129 bus_space_handle_t ioh = sc->sc_ioh; 130 131 bus_space_write_1(iot, ioh, 0, reg); 132 bus_space_write_1(iot, ioh, 1, datum); 133 } 134 135 static u_int 136 mcclock_isa_read(struct mcclock_softc *mcsc, u_int reg) 137 { 138 struct mcclock_isa_softc *sc = (struct mcclock_isa_softc *)mcsc; 139 bus_space_tag_t iot = sc->sc_iot; 140 bus_space_handle_t ioh = sc->sc_ioh; 141 142 bus_space_write_1(iot, ioh, 0, reg); 143 return bus_space_read_1(iot, ioh, 1); 144 } 145