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Check if we can map the read port, but don't really allocate it because it 

will cause a conflict with the SoundBlaster Joysticks that say that they
require 200/8 and 207 is usually the read port. XXX: This is a hack.
This commit is contained in:
christos 1997-08-07 19:44:03 +00:00
parent 6b1b87f213
commit 7bd5c461f5
1 changed files with 16 additions and 5 deletions
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21
sys/arch/i386/isa/isapnp_machdep.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: isapnp_machdep.c,v 1.2 1997/02/24 22:13:55 christos Exp $ */
/* $NetBSD: isapnp_machdep.c,v 1.3 1997/08/07 19:44:03 christos Exp $ */
/*
* Copyright (c) 1996 Jason R. Thorpe. All rights reserved.
@ -94,20 +94,31 @@ int
isapnp_map_readport(sc)
struct isapnp_softc *sc;
{
int error;
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);
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);
return 0;
}
/* isapnp_unmap_readport():
* Unmap a previously mapped `read port'.
* Pretend to 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);
/* Do nothing */
}