114 lines
3.6 KiB
C
114 lines
3.6 KiB
C
/* $NetBSD: isapnp_machdep.c,v 1.2 1997/02/24 22:13:55 christos Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1996 Jason R. Thorpe. All rights reserved.
|
|
* 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
|
|
* and Jason R. Thorpe.
|
|
* 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 <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/device.h>
|
|
#include <sys/malloc.h>
|
|
|
|
#include <machine/bus.h>
|
|
|
|
#include <dev/isa/isavar.h>
|
|
|
|
#include <dev/isapnp/isapnpreg.h>
|
|
#include <dev/isapnp/isapnpvar.h>
|
|
|
|
/* isapnp_map():
|
|
* Map I/O regions used by PnP
|
|
*/
|
|
int
|
|
isapnp_map(sc)
|
|
struct isapnp_softc *sc;
|
|
{
|
|
|
|
if (sc->sc_iot != I386_BUS_SPACE_IO)
|
|
panic("isapnp_map: bogus bus space tag");
|
|
|
|
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(sc)
|
|
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(sc)
|
|
struct isapnp_softc *sc;
|
|
{
|
|
if (sc->sc_iot != I386_BUS_SPACE_IO)
|
|
panic("isapnp_map_readport: bogus bus space tag");
|
|
|
|
/* Check if some other device has already claimed this port. */
|
|
return bus_space_map(sc->sc_iot, sc->sc_read_port, 1, 0,
|
|
&sc->sc_read_ioh);
|
|
}
|
|
|
|
/* isapnp_unmap_readport():
|
|
* Unmap a previously mapped `read port'.
|
|
*/
|
|
void
|
|
isapnp_unmap_readport(sc)
|
|
struct isapnp_softc *sc;
|
|
{
|
|
bus_space_unmap(sc->sc_iot, sc->sc_read_ioh, 1);
|
|
}
|