/* $OpenBSD: isapnp_machdep.c,v 1.5 2023/01/30 10:49:05 jsg Exp $ */ /* $NetBSD: isapnp_machdep.c,v 1.5 1997/10/04 17:32:30 thorpej Exp $ */ /*- * Copyright (c) 1996, 1997 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, * NASA Ames Research Center. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ /* * Copyright (c) 1996 Christos Zoulas. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Christos Zoulas. * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /* * Machine-dependent portions of ISA PnP bus autoconfiguration. * * N.B. This file exists mostly to get around some lameness surrounding * the PnP spec. ISA PnP registers live where some `normal' ISA * devices do, but are e.g. write-only registers where the normal * device has a read-only register. This breaks in the presence of * i/o port accounting. This file takes care of mapping ISA PnP * registers without actually allocating them in extent maps. * * Since this is a machine-dependent file, we make all sorts of * assumptions about bus.h's guts. Beware! */ #include #include #include #include #include /* isapnp_map(): * Map I/O regions used by PnP */ int isapnp_map(struct isapnp_softc *sc) { #ifdef DIAGNOSTIC if (sc->sc_iot != I386_BUS_SPACE_IO) panic("isapnp_map: bogus bus space tag"); #endif sc->sc_addr_ioh = ISAPNP_ADDR; sc->sc_wrdata_ioh = ISAPNP_WRDATA; return (0); } /* isapnp_unmap(): * Unmap I/O regions used by PnP */ void isapnp_unmap(struct isapnp_softc *sc) { /* Do nothing. */ } /* isapnp_map_readport(): * Called to map the PnP `read port', which is mapped independently * of the `write' and `addr' ports. * * NOTE: assumes the caller has filled in sc->sc_read_port! */ int isapnp_map_readport(struct isapnp_softc *sc) { #ifdef _KERNEL int error; #endif #ifdef DIAGNOSTIC if (sc->sc_iot != I386_BUS_SPACE_IO) panic("isapnp_map_readport: bogus bus space tag"); #endif #ifdef _KERNEL /* Check if some other device has already claimed this port. */ if ((error = bus_space_map(sc->sc_iot, sc->sc_read_port, 1, 0, &sc->sc_read_ioh)) != 0) return error; /* * XXX: We unmap the port because it can and will be used by other * devices such as a joystick. We need a better port accounting * scheme with read and write ports. */ bus_space_unmap(sc->sc_iot, sc->sc_read_ioh, 1); #endif return 0; } /* isapnp_unmap_readport(): * Pretend to unmap a previously mapped `read port'. */ void isapnp_unmap_readport(struct isapnp_softc *sc) { /* Do nothing */ }