isapnp_machdep.c revision 1.4.24.1
1 /* $NetBSD: isapnp_machdep.c,v 1.4.24.1 2004/08/03 10:33:26 skrll 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/cdefs.h> 89 __KERNEL_RCSID(0, "$NetBSD: isapnp_machdep.c,v 1.4.24.1 2004/08/03 10:33:26 skrll Exp $"); 90 91 #include <sys/param.h> 92 #include <sys/systm.h> 93 #include <sys/device.h> 94 #include <sys/malloc.h> 95 96 #include <machine/bus.h> 97 98 #include <dev/isa/isavar.h> 99 100 #include <dev/isapnp/isapnpreg.h> 101 #include <dev/isapnp/isapnpvar.h> 102 103 #ifdef DIAGNOSTIC 104 #include <machine/iomap.h> 105 #endif 106 107 108 /* isapnp_map(): 109 * Map I/O regions used by PnP 110 */ 111 int 112 isapnp_map(sc) 113 struct isapnp_softc *sc; 114 { 115 #ifdef _KERNEL 116 int error; 117 #endif 118 119 #ifdef DIAGNOSTIC 120 if (sc->sc_iot->base != ISA_IOSTART) 121 panic("isapnp_map: bogus bus space tag"); 122 #endif 123 124 #ifdef _KERNEL 125 if ((error = bus_space_map(sc->sc_iot, ISAPNP_ADDR, 1, 0, 126 &sc->sc_addr_ioh)) != 0) 127 return error; 128 if ((error = bus_space_map(sc->sc_iot, ISAPNP_WRDATA, 1, 0, 129 &sc->sc_wrdata_ioh)) != 0) 130 return error; 131 #endif 132 return (0); 133 } 134 135 /* isapnp_unmap(): 136 * Unmap I/O regions used by PnP 137 */ 138 void 139 isapnp_unmap(sc) 140 struct isapnp_softc *sc; 141 { 142 143 #ifdef DIAGNOSTIC 144 if (sc->sc_iot->base != ISA_IOSTART) 145 panic("isapnp_map: bogus bus space tag"); 146 #endif 147 148 bus_space_unmap(sc->sc_iot, sc->sc_addr_ioh, 1); 149 bus_space_unmap(sc->sc_iot, sc->sc_wrdata_ioh, 1); 150 } 151 152 /* isapnp_map_readport(): 153 * Called to map the PnP `read port', which is mapped independently 154 * of the `write' and `addr' ports. 155 * 156 * NOTE: assumes the caller has filled in sc->sc_read_port! 157 */ 158 int 159 isapnp_map_readport(sc) 160 struct isapnp_softc *sc; 161 { 162 #ifdef _KERNEL 163 int error; 164 #endif 165 166 #ifdef DIAGNOSTIC 167 if (sc->sc_iot->base != ISA_IOSTART) 168 panic("isapnp_map_readport: bogus bus space tag"); 169 #endif 170 171 #ifdef _KERNEL 172 /* Check if some other device has already claimed this port. */ 173 if ((error = bus_space_map(sc->sc_iot, sc->sc_read_port, 1, 0, 174 &sc->sc_read_ioh)) != 0) 175 return error; 176 #endif 177 return 0; 178 } 179 180 /* isapnp_unmap_readport(): 181 * Pretend to unmap a previously mapped `read port'. 182 */ 183 void 184 isapnp_unmap_readport(sc) 185 struct isapnp_softc *sc; 186 { 187 188 #ifdef DIAGNOSTIC 189 if (sc->sc_iot->base != ISA_IOSTART) 190 panic("isapnp_map_readport: bogus bus space tag"); 191 #endif 192 193 bus_space_unmap(sc->sc_iot, sc->sc_read_ioh, 1); 194 } 195
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