1 /* $OpenBSD: mcclock_isa.c,v 1.4 2022/10/15 14:58:54 jsg Exp $ */ 2 /* $NetBSD: mcclock_isa.c,v 1.5 1996/12/05 01:39:29 cgd Exp $ */ 3 4 /* 5 * Copyright (c) 1995, 1996 Carnegie-Mellon University. 6 * All rights reserved. 7 * 8 * Author: Chris G. Demetriou 9 * 10 * Permission to use, copy, modify and distribute this software and 11 * its documentation is hereby granted, provided that both the copyright 12 * notice and this permission notice appear in all copies of the 13 * software, derivative works or modified versions, and any portions 14 * thereof, and that both notices appear in supporting documentation. 15 * 16 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 17 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 18 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 19 * 20 * Carnegie Mellon requests users of this software to return to 21 * 22 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 23 * School of Computer Science 24 * Carnegie Mellon University 25 * Pittsburgh PA 15213-3890 26 * 27 * any improvements or extensions that they make and grant Carnegie the 28 * rights to redistribute these changes. 29 */ 30 31 #include <sys/param.h> 32 #include <sys/kernel.h> 33 #include <sys/systm.h> 34 #include <sys/device.h> 35 36 #include <machine/bus.h> 37 38 #include <dev/clock_subr.h> 39 #include <dev/ic/mc146818reg.h> 40 #include <dev/isa/isavar.h> 41 42 #include <loongson/dev/mcclockvar.h> 43 44 struct mcclock_isa_softc { 45 struct mcclock_softc sc_mcclock; 46 47 bus_space_tag_t sc_iot; 48 bus_space_handle_t sc_ioh; 49 }; 50 51 int mcclock_isa_match(struct device *, void *, void *); 52 void mcclock_isa_attach(struct device *, struct device *, void *); 53 54 const struct cfattach mcclock_isa_ca = { 55 sizeof (struct mcclock_isa_softc), mcclock_isa_match, 56 mcclock_isa_attach, 57 }; 58 59 void mcclock_isa_write(struct mcclock_softc *, u_int, u_int); 60 u_int mcclock_isa_read(struct mcclock_softc *, u_int); 61 62 const struct mcclock_busfns mcclock_isa_busfns = { 63 mcclock_isa_write, mcclock_isa_read, 64 }; 65 66 int 67 mcclock_isa_match(struct device *parent, void *match, void *aux) 68 { 69 struct isa_attach_args *ia = aux; 70 bus_space_handle_t ioh; 71 72 if ((ia->ia_iobase != IOBASEUNK && ia->ia_iobase != 0x70) || 73 /* (ia->ia_iosize != 0 && ia->ia_iosize != 0x2) || XXX isa.c */ 74 ia->ia_maddr != MADDRUNK || ia->ia_msize != 0 || 75 ia->ia_irq != IRQUNK || ia->ia_drq != DRQUNK) 76 return (0); 77 78 if (bus_space_map(ia->ia_iot, 0x70, 0x2, 0, &ioh)) 79 return (0); 80 81 bus_space_unmap(ia->ia_iot, ioh, 0x2); 82 83 ia->ia_iobase = 0x70; 84 ia->ia_iosize = 0x2; 85 86 return (1); 87 } 88 89 void 90 mcclock_isa_attach(struct device *parent, struct device *self, void *aux) 91 { 92 struct isa_attach_args *ia = aux; 93 struct mcclock_isa_softc *sc = (struct mcclock_isa_softc *)self; 94 95 sc->sc_iot = ia->ia_iot; 96 if (bus_space_map(sc->sc_iot, ia->ia_iobase, ia->ia_iosize, 0, 97 &sc->sc_ioh)) 98 panic("mcclock_isa_attach: couldn't map clock I/O space"); 99 100 mcclock_attach(&sc->sc_mcclock, &mcclock_isa_busfns); 101 } 102 103 void 104 mcclock_isa_write(struct mcclock_softc *mcsc, u_int reg, u_int datum) 105 { 106 struct mcclock_isa_softc *sc = (struct mcclock_isa_softc *)mcsc; 107 bus_space_tag_t iot = sc->sc_iot; 108 bus_space_handle_t ioh = sc->sc_ioh; 109 110 bus_space_write_1(iot, ioh, 0, reg); 111 bus_space_write_1(iot, ioh, 1, datum); 112 } 113 114 u_int 115 mcclock_isa_read(struct mcclock_softc *mcsc, u_int reg) 116 { 117 struct mcclock_isa_softc *sc = (struct mcclock_isa_softc *)mcsc; 118 bus_space_tag_t iot = sc->sc_iot; 119 bus_space_handle_t ioh = sc->sc_ioh; 120 121 bus_space_write_1(iot, ioh, 0, reg); 122 return bus_space_read_1(iot, ioh, 1); 123 } 124