179 lines
5.8 KiB
C
179 lines
5.8 KiB
C
/* $NetBSD: isapnp_machdep.c,v 1.10 2011/07/01 20:34:06 dyoung 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 and by Christos Zoulas.
|
|
*
|
|
* 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) 1997 Thomas Gerner. 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.
|
|
*
|
|
* 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!
|
|
*
|
|
* Note: We just use bus_space{,un}map() here, because we need to
|
|
* actually map the space into KVA space. This works because we
|
|
* don't do space accounting (we'd need a back-door to bypass it
|
|
* if we did!).
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__KERNEL_RCSID(0, "$NetBSD: isapnp_machdep.c,v 1.10 2011/07/01 20:34:06 dyoung Exp $");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/device.h>
|
|
#include <sys/malloc.h>
|
|
|
|
#include <sys/bus.h>
|
|
|
|
#include <dev/isa/isavar.h>
|
|
|
|
#include <dev/isapnp/isapnpreg.h>
|
|
#include <dev/isapnp/isapnpvar.h>
|
|
|
|
#ifdef DIAGNOSTIC
|
|
#include <machine/iomap.h>
|
|
#endif
|
|
|
|
|
|
/* isapnp_map():
|
|
* Map I/O regions used by PnP
|
|
*/
|
|
int
|
|
isapnp_map(struct isapnp_softc *sc)
|
|
{
|
|
#ifdef _KERNEL
|
|
int error;
|
|
#endif
|
|
|
|
#ifdef DIAGNOSTIC
|
|
if (sc->sc_iot->base != ISA_IOSTART)
|
|
panic("isapnp_map: bogus bus space tag");
|
|
#endif
|
|
|
|
#ifdef _KERNEL
|
|
if ((error = bus_space_map(sc->sc_iot, ISAPNP_ADDR, 1, 0,
|
|
&sc->sc_addr_ioh)) != 0)
|
|
return error;
|
|
if ((error = bus_space_map(sc->sc_iot, ISAPNP_WRDATA, 1, 0,
|
|
&sc->sc_wrdata_ioh)) != 0)
|
|
return error;
|
|
#endif
|
|
return (0);
|
|
}
|
|
|
|
/* isapnp_unmap():
|
|
* Unmap I/O regions used by PnP
|
|
*/
|
|
void
|
|
isapnp_unmap(struct isapnp_softc *sc)
|
|
{
|
|
|
|
#ifdef DIAGNOSTIC
|
|
if (sc->sc_iot->base != ISA_IOSTART)
|
|
panic("isapnp_map: bogus bus space tag");
|
|
#endif
|
|
|
|
bus_space_unmap(sc->sc_iot, sc->sc_addr_ioh, 1);
|
|
bus_space_unmap(sc->sc_iot, sc->sc_wrdata_ioh, 1);
|
|
}
|
|
|
|
/* 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->base != ISA_IOSTART)
|
|
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;
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
/* isapnp_unmap_readport():
|
|
* Pretend to unmap a previously mapped `read port'.
|
|
*/
|
|
void
|
|
isapnp_unmap_readport(struct isapnp_softc *sc)
|
|
{
|
|
|
|
#ifdef DIAGNOSTIC
|
|
if (sc->sc_iot->base != ISA_IOSTART)
|
|
panic("isapnp_map_readport: bogus bus space tag");
|
|
#endif
|
|
|
|
bus_space_unmap(sc->sc_iot, sc->sc_read_ioh, 1);
|
|
}
|