1 /* $NetBSD: isapnp_machdep.c,v 1.1 2002/02/10 12:26:02 chris Exp $ */ 2 3 /*- 4 * Copyright (c) 1996, 1997 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 9 * NASA Ames Research Center and by Christos Zoulas. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the NetBSD 22 * Foundation, Inc. and its contributors. 23 * 4. Neither the name of The NetBSD Foundation nor the names of its 24 * contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40 /* 41 * Copyright (c) 1997 Thomas Gerner. All rights reserved. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 3. All advertising materials mentioning features or use of this software 52 * must display the following acknowledgement: 53 * This product includes software developed by Christos Zoulas. 54 * 4. The name of the author may not be used to endorse or promote products 55 * derived from this software without specific prior written permission. 56 * 57 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 58 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 59 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 60 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 61 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 62 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 63 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 64 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 65 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 66 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 67 */ 68 69 /* 70 * Machine-dependent portions of ISA PnP bus autoconfiguration. 71 * 72 * N.B. This file exists mostly to get around some lameness surrounding 73 * the PnP spec. ISA PnP registers live where some `normal' ISA 74 * devices do, but are e.g. write-only registers where the normal 75 * device has a read-only register. This breaks in the presence of 76 * i/o port accounting. This file takes care of mapping ISA PnP 77 * registers without actually allocating them in extent maps. 78 * 79 * Since this is a machine-dependent file, we make all sorts of 80 * assumptions about bus.h's guts. Beware! 81 * 82 * Note: We just use bus_space{,un}map() here. This works because we 83 * don't do space accounting (we'd need a back-door to bypass it 84 * if we did!). 85 */ 86 87 #include <sys/param.h> 88 #include <sys/systm.h> 89 #include <sys/device.h> 90 #include <sys/malloc.h> 91 92 #include <machine/bus.h> 93 94 #include <dev/isa/isavar.h> 95 96 #include <dev/isapnp/isapnpreg.h> 97 #include <dev/isapnp/isapnpvar.h> 98 99 /* isapnp_map(): 100 * Map I/O regions used by PnP 101 */ 102 int 103 isapnp_map(sc) 104 struct isapnp_softc *sc; 105 { 106 #ifdef _KERNEL 107 int error; 108 #endif 109 110 #ifdef _KERNEL 111 if ((error = bus_space_map(sc->sc_iot, ISAPNP_ADDR, 1, 0, 112 &sc->sc_addr_ioh)) != 0) 113 return error; 114 if ((error = bus_space_map(sc->sc_iot, ISAPNP_WRDATA, 1, 0, 115 &sc->sc_wrdata_ioh)) != 0) 116 return error; 117 #endif 118 return (0); 119 } 120 121 /* isapnp_unmap(): 122 * Unmap I/O regions used by PnP 123 */ 124 void 125 isapnp_unmap(sc) 126 struct isapnp_softc *sc; 127 { 128 129 bus_space_unmap(sc->sc_iot, sc->sc_addr_ioh, 1); 130 bus_space_unmap(sc->sc_iot, sc->sc_wrdata_ioh, 1); 131 } 132 133 /* isapnp_map_readport(): 134 * Called to map the PnP `read port', which is mapped independently 135 * of the `write' and `addr' ports. 136 * 137 * NOTE: assumes the caller has filled in sc->sc_read_port! 138 */ 139 int 140 isapnp_map_readport(sc) 141 struct isapnp_softc *sc; 142 { 143 #ifdef _KERNEL 144 int error; 145 #endif 146 147 #ifdef _KERNEL 148 /* Check if some other device has already claimed this port. */ 149 if ((error = bus_space_map(sc->sc_iot, sc->sc_read_port, 1, 0, 150 &sc->sc_read_ioh)) != 0) 151 return error; 152 #endif 153 return 0; 154 } 155 156 /* isapnp_unmap_readport(): 157 * Pretend to unmap a previously mapped `read port'. 158 */ 159 void 160 isapnp_unmap_readport(sc) 161 struct isapnp_softc *sc; 162 { 163 164 bus_space_unmap(sc->sc_iot, sc->sc_read_ioh, 1); 165 } 166