1 /* $NetBSD: mcclock_isa.c,v 1.4 2002/10/02 05:12:54 thorpej 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 1.4 2002/10/02 05:12:54 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 <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 CFATTACH_DECL(mcclock_isa, sizeof (struct mcclock_isa_softc), 60 mcclock_isa_match, mcclock_isa_attach, NULL, NULL); 61 62 static void mcclock_isa_write(struct mcclock_softc *, u_int, u_int); 63 static u_int mcclock_isa_read(struct mcclock_softc *, u_int); 64 65 const struct mcclock_busfns mcclock_isa_busfns = { 66 mcclock_isa_write, mcclock_isa_read, 67 }; 68 69 static int 70 mcclock_isa_match(struct device *parent, struct cfdata *match, void *aux) 71 { 72 struct isa_attach_args *ia = aux; 73 bus_space_handle_t ioh; 74 75 if (ia->ia_nio < 1 || 76 (ia->ia_io[0].ir_addr != ISACF_PORT_DEFAULT && 77 ia->ia_io[0].ir_addr != IO_RTC)) 78 return (0); 79 80 if (ia->ia_niomem > 0 && 81 (ia->ia_iomem[0].ir_addr != ISACF_IOMEM_DEFAULT)) 82 return (0); 83 84 if (ia->ia_nirq > 0 && 85 (ia->ia_irq[0].ir_irq != ISACF_IRQ_DEFAULT)) 86 return (0); 87 88 if (ia->ia_ndrq > 0 && 89 (ia->ia_drq[0].ir_drq != ISACF_DRQ_DEFAULT)) 90 return (0); 91 92 if (bus_space_map(ia->ia_iot, IO_RTC, 0x2, 0, &ioh)) 93 return (0); 94 95 bus_space_unmap(ia->ia_iot, ioh, 0x2); 96 97 ia->ia_nio = 1; 98 ia->ia_io[0].ir_addr = IO_RTC; 99 ia->ia_io[0].ir_size = 0x02; 100 101 ia->ia_niomem = 0; 102 ia->ia_nirq = 0; 103 ia->ia_ndrq = 0; 104 105 return (1); 106 } 107 108 static void 109 mcclock_isa_attach(struct device *parent, struct device *self, void *aux) 110 { 111 struct isa_attach_args *ia = aux; 112 struct mcclock_isa_softc *sc = (struct mcclock_isa_softc *)self; 113 114 sc->sc_iot = ia->ia_iot; 115 if (bus_space_map(sc->sc_iot, ia->ia_io[0].ir_addr, 116 ia->ia_io[0].ir_size, 0, &sc->sc_ioh)) 117 panic("mcclock_isa_attach: couldn't map clock I/O space"); 118 119 mcclock_attach(&sc->sc_mcclock, &mcclock_isa_busfns); 120 } 121 122 static void 123 mcclock_isa_write(struct mcclock_softc *mcsc, u_int reg, u_int datum) 124 { 125 struct mcclock_isa_softc *sc = (struct mcclock_isa_softc *)mcsc; 126 bus_space_tag_t iot = sc->sc_iot; 127 bus_space_handle_t ioh = sc->sc_ioh; 128 129 bus_space_write_1(iot, ioh, 0, reg); 130 bus_space_write_1(iot, ioh, 1, datum); 131 } 132 133 static u_int 134 mcclock_isa_read(struct mcclock_softc *mcsc, u_int reg) 135 { 136 struct mcclock_isa_softc *sc = (struct mcclock_isa_softc *)mcsc; 137 bus_space_tag_t iot = sc->sc_iot; 138 bus_space_handle_t ioh = sc->sc_ioh; 139 140 bus_space_write_1(iot, ioh, 0, reg); 141 return bus_space_read_1(iot, ioh, 1); 142 } 143