isapnp_machdep.c revision 1.4.8.2
1 /* $NetBSD: isapnp_machdep.c,v 1.4.8.2 2001/06/20 10:24:23 leo 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, because we need to 83 * actually map the space into KVA space. This works because we 84 * don't do space accounting (we'd need a back-door to bypass it 85 * if we did!). 86 */ 87 88 #include <sys/param.h> 89 #include <sys/systm.h> 90 #include <sys/device.h> 91 #include <sys/malloc.h> 92 93 #include <machine/bus.h> 94 95 #include <dev/isa/isavar.h> 96 97 #include <dev/isapnp/isapnpreg.h> 98 #include <dev/isapnp/isapnpvar.h> 99 100 #ifdef DIAGNOSTIC 101 #include <machine/iomap.h> 102 #endif 103 104 105 /* isapnp_map(): 106 * Map I/O regions used by PnP 107 */ 108 int 109 isapnp_map(sc) 110 struct isapnp_softc *sc; 111 { 112 #ifdef _KERNEL 113 int error; 114 #endif 115 116 #ifdef DIAGNOSTIC 117 if (sc->sc_iot->base != ISA_IOSTART) 118 panic("isapnp_map: bogus bus space tag"); 119 #endif 120 121 #ifdef _KERNEL 122 if ((error = bus_space_map(sc->sc_iot, ISAPNP_ADDR, 1, 0, 123 &sc->sc_addr_ioh)) != 0) 124 return error; 125 if ((error = bus_space_map(sc->sc_iot, ISAPNP_WRDATA, 1, 0, 126 &sc->sc_wrdata_ioh)) != 0) 127 return error; 128 #endif 129 return (0); 130 } 131 132 /* isapnp_unmap(): 133 * Unmap I/O regions used by PnP 134 */ 135 void 136 isapnp_unmap(sc) 137 struct isapnp_softc *sc; 138 { 139 140 #ifdef DIAGNOSTIC 141 if (sc->sc_iot->base != ISA_IOSTART) 142 panic("isapnp_map: bogus bus space tag"); 143 #endif 144 145 bus_space_unmap(sc->sc_iot, sc->sc_addr_ioh, 1); 146 bus_space_unmap(sc->sc_iot, sc->sc_wrdata_ioh, 1); 147 } 148 149 /* isapnp_map_readport(): 150 * Called to map the PnP `read port', which is mapped independently 151 * of the `write' and `addr' ports. 152 * 153 * NOTE: assumes the caller has filled in sc->sc_read_port! 154 */ 155 int 156 isapnp_map_readport(sc) 157 struct isapnp_softc *sc; 158 { 159 #ifdef _KERNEL 160 int error; 161 #endif 162 163 #ifdef DIAGNOSTIC 164 if (sc->sc_iot->base != ISA_IOSTART) 165 panic("isapnp_map_readport: bogus bus space tag"); 166 #endif 167 168 #ifdef _KERNEL 169 /* Check if some other device has already claimed this port. */ 170 if ((error = bus_space_map(sc->sc_iot, sc->sc_read_port, 1, 0, 171 &sc->sc_read_ioh)) != 0) 172 return error; 173 #endif 174 return 0; 175 } 176 177 /* isapnp_unmap_readport(): 178 * Pretend to unmap a previously mapped `read port'. 179 */ 180 void 181 isapnp_unmap_readport(sc) 182 struct isapnp_softc *sc; 183 { 184 185 #ifdef DIAGNOSTIC 186 if (sc->sc_iot->base != ISA_IOSTART) 187 panic("isapnp_map_readport: bogus bus space tag"); 188 #endif 189 190 bus_space_unmap(sc->sc_iot, sc->sc_read_ioh, 1); 191 } 192
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