isapnp_machdep.c revision 1.7.2.2
1 1.7.2.2 lukem /* $NetBSD: isapnp_machdep.c,v 1.7.2.2 2001/11/15 07:03:33 lukem Exp $ */ 2 1.7.2.2 lukem 3 1.7.2.2 lukem /*- 4 1.7.2.2 lukem * Copyright (c) 1996, 1997 The NetBSD Foundation, Inc. 5 1.7.2.2 lukem * All rights reserved. 6 1.7.2.2 lukem * 7 1.7.2.2 lukem * This code is derived from software contributed to The NetBSD Foundation 8 1.7.2.2 lukem * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 9 1.7.2.2 lukem * NASA Ames Research Center and by Christos Zoulas. 10 1.7.2.2 lukem * 11 1.7.2.2 lukem * Redistribution and use in source and binary forms, with or without 12 1.7.2.2 lukem * modification, are permitted provided that the following conditions 13 1.7.2.2 lukem * are met: 14 1.7.2.2 lukem * 1. Redistributions of source code must retain the above copyright 15 1.7.2.2 lukem * notice, this list of conditions and the following disclaimer. 16 1.7.2.2 lukem * 2. Redistributions in binary form must reproduce the above copyright 17 1.7.2.2 lukem * notice, this list of conditions and the following disclaimer in the 18 1.7.2.2 lukem * documentation and/or other materials provided with the distribution. 19 1.7.2.2 lukem * 3. All advertising materials mentioning features or use of this software 20 1.7.2.2 lukem * must display the following acknowledgement: 21 1.7.2.2 lukem * This product includes software developed by the NetBSD 22 1.7.2.2 lukem * Foundation, Inc. and its contributors. 23 1.7.2.2 lukem * 4. Neither the name of The NetBSD Foundation nor the names of its 24 1.7.2.2 lukem * contributors may be used to endorse or promote products derived 25 1.7.2.2 lukem * from this software without specific prior written permission. 26 1.7.2.2 lukem * 27 1.7.2.2 lukem * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 1.7.2.2 lukem * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 1.7.2.2 lukem * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 1.7.2.2 lukem * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 1.7.2.2 lukem * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 1.7.2.2 lukem * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 1.7.2.2 lukem * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 1.7.2.2 lukem * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 1.7.2.2 lukem * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 1.7.2.2 lukem * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 1.7.2.2 lukem * POSSIBILITY OF SUCH DAMAGE. 38 1.7.2.2 lukem */ 39 1.7.2.2 lukem 40 1.7.2.2 lukem /* 41 1.7.2.2 lukem * Machine-dependent portions of ISA PnP bus autoconfiguration. 42 1.7.2.2 lukem * 43 1.7.2.2 lukem * N.B. This file exists mostly to get around some lameness surrounding 44 1.7.2.2 lukem * the PnP spec. ISA PnP registers live where some `normal' ISA 45 1.7.2.2 lukem * devices do, but are e.g. write-only registers where the normal 46 1.7.2.2 lukem * device has a read-only register. This breaks in the presence of 47 1.7.2.2 lukem * i/o port accounting. This file takes care of mapping ISA PnP 48 1.7.2.2 lukem * registers without actually allocating them in extent maps. 49 1.7.2.2 lukem * 50 1.7.2.2 lukem * Since this is a machine-dependent file, we make all sorts of 51 1.7.2.2 lukem * assumptions about bus.h's guts. Beware! 52 1.7.2.2 lukem */ 53 1.7.2.2 lukem 54 1.7.2.2 lukem #include <sys/cdefs.h> 55 1.7.2.2 lukem __KERNEL_RCSID(0, "$NetBSD: isapnp_machdep.c,v 1.7.2.2 2001/11/15 07:03:33 lukem Exp $"); 56 1.7.2.2 lukem 57 1.7.2.2 lukem #include <sys/param.h> 58 1.7.2.2 lukem #include <sys/systm.h> 59 1.7.2.2 lukem #include <sys/device.h> 60 1.7.2.2 lukem #include <sys/malloc.h> 61 1.7.2.2 lukem 62 1.7.2.2 lukem #include <machine/bus.h> 63 1.7.2.2 lukem 64 1.7.2.2 lukem #include <dev/isa/isavar.h> 65 1.7.2.2 lukem 66 1.7.2.2 lukem #include <dev/isapnp/isapnpreg.h> 67 1.7.2.2 lukem #include <dev/isapnp/isapnpvar.h> 68 1.7.2.2 lukem 69 1.7.2.2 lukem /* isapnp_map(): 70 1.7.2.2 lukem * Map I/O regions used by PnP 71 1.7.2.2 lukem */ 72 1.7.2.2 lukem int 73 1.7.2.2 lukem isapnp_map(sc) 74 1.7.2.2 lukem struct isapnp_softc *sc; 75 1.7.2.2 lukem { 76 1.7.2.2 lukem 77 1.7.2.2 lukem #ifdef DIAGNOSTIC 78 1.7.2.2 lukem if (sc->sc_iot != I386_BUS_SPACE_IO) 79 1.7.2.2 lukem panic("isapnp_map: bogus bus space tag"); 80 1.7.2.2 lukem #endif 81 1.7.2.2 lukem 82 1.7.2.2 lukem sc->sc_addr_ioh = ISAPNP_ADDR; 83 1.7.2.2 lukem sc->sc_wrdata_ioh = ISAPNP_WRDATA; 84 1.7.2.2 lukem return (0); 85 1.7.2.2 lukem } 86 1.7.2.2 lukem 87 1.7.2.2 lukem /* isapnp_unmap(): 88 1.7.2.2 lukem * Unmap I/O regions used by PnP 89 1.7.2.2 lukem */ 90 1.7.2.2 lukem void 91 1.7.2.2 lukem isapnp_unmap(sc) 92 1.7.2.2 lukem struct isapnp_softc *sc; 93 1.7.2.2 lukem { 94 1.7.2.2 lukem 95 1.7.2.2 lukem /* Do nothing. */ 96 1.7.2.2 lukem } 97 1.7.2.2 lukem 98 1.7.2.2 lukem /* isapnp_map_readport(): 99 1.7.2.2 lukem * Called to map the PnP `read port', which is mapped independently 100 1.7.2.2 lukem * of the `write' and `addr' ports. 101 1.7.2.2 lukem * 102 1.7.2.2 lukem * NOTE: assumes the caller has filled in sc->sc_read_port! 103 1.7.2.2 lukem */ 104 1.7.2.2 lukem int 105 1.7.2.2 lukem isapnp_map_readport(sc) 106 1.7.2.2 lukem struct isapnp_softc *sc; 107 1.7.2.2 lukem { 108 1.7.2.2 lukem #ifdef _KERNEL 109 1.7.2.2 lukem int error; 110 1.7.2.2 lukem #endif 111 1.7.2.2 lukem 112 1.7.2.2 lukem #ifdef DIAGNOSTIC 113 1.7.2.2 lukem if (sc->sc_iot != I386_BUS_SPACE_IO) 114 1.7.2.2 lukem panic("isapnp_map_readport: bogus bus space tag"); 115 1.7.2.2 lukem #endif 116 1.7.2.2 lukem 117 1.7.2.2 lukem #ifdef _KERNEL 118 1.7.2.2 lukem /* Check if some other device has already claimed this port. */ 119 1.7.2.2 lukem if ((error = bus_space_map(sc->sc_iot, sc->sc_read_port, 1, 0, 120 1.7.2.2 lukem &sc->sc_read_ioh)) != 0) 121 1.7.2.2 lukem return error; 122 1.7.2.2 lukem 123 1.7.2.2 lukem /* 124 1.7.2.2 lukem * XXX: We unmap the port because it can and will be used by other 125 1.7.2.2 lukem * devices such as a joystick. We need a better port accounting 126 1.7.2.2 lukem * scheme with read and write ports. 127 1.7.2.2 lukem */ 128 1.7.2.2 lukem bus_space_unmap(sc->sc_iot, sc->sc_read_ioh, 1); 129 1.7.2.2 lukem #endif 130 1.7.2.2 lukem return 0; 131 1.7.2.2 lukem } 132 1.7.2.2 lukem 133 1.7.2.2 lukem /* isapnp_unmap_readport(): 134 1.7.2.2 lukem * Pretend to unmap a previously mapped `read port'. 135 1.7.2.2 lukem */ 136 1.7.2.2 lukem void 137 1.7.2.2 lukem isapnp_unmap_readport(sc) 138 1.7.2.2 lukem struct isapnp_softc *sc; 139 1.7.2.2 lukem { 140 1.7.2.2 lukem 141 1.7.2.2 lukem /* Do nothing */ 142 1.7.2.2 lukem } 143
Indexes created Tue Oct 21 16:10:11 GMT 2025