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/* $OpenBSD: gus_isa.c,v 1.5 2008/06/26 05:42:16 ray Exp $ */
/* $NetBSD: gus.c,v 1.51 1998/01/25 23:48:06 mycroft Exp $ */
/*-
* Copyright (c) 1996 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Ken Hornstein and John Kohl.
*
* 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.
*/
/*
*
* TODO:
* . figure out why mixer activity while sound is playing causes problems
* (phantom interrupts?)
* . figure out a better deinterleave strategy that avoids sucking up
* CPU, memory and cache bandwidth. (Maybe a special encoding?
* Maybe use the double-speed sampling/hardware deinterleave trick
* from the GUS SDK?) A 486/33 isn't quite fast enough to keep
* up with 44.1kHz 16-bit stereo output without some drop-outs.
* . use CS4231 for 16-bit sampling, for a-law and mu-law playback.
* . actually test full-duplex sampling(recording) and playback.
*/
/*
* Gravis UltraSound driver
*
* For more detailed information, see the GUS developers' kit
* available on the net at:
*
* ftp://freedom.nmsu.edu/pub/ultrasound/gravis/util/
* gusdkXXX.zip (developers' kit--get rev 2.22 or later)
* See ultrawrd.doc inside--it's MS Word (ick), but it's the bible
*
*/
/*
* The GUS Max has a slightly strange set of connections between the CS4231
* and the GF1 and the DMA interconnects. It's set up so that the CS4231 can
* be playing while the GF1 is loading patches from the system.
*
* Here's a recreation of the DMA interconnect diagram:
*
* GF1
* +---------+ digital
* | | record ASIC
* | |--------------+
* | | | +--------+
* | | play (dram) | +----+ | |
* | |--------------(------|-\ | | +-+ |
* +---------+ | | >-|----|---|C|--|------ dma chan 1
* | +---|-/ | | +-+ |
* | | +----+ | | |
* | | +----+ | | |
* +---------+ +-+ +--(---|-\ | | | |
* | | play |8| | | >-|----|----+---|------ dma chan 2
* | ---C----|--------|/|------(---|-/ | | |
* | ^ |record |1| | +----+ | |
* | | | /----|6|------+ +--------+
* | ---+----|--/ +-+
* +---------+
* CS4231 8-to-16 bit bus conversion, if needed
*
*
* "C" is an optional combiner.
*
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/ioctl.h>
#include <sys/syslog.h>
#include <sys/device.h>
#include <sys/proc.h>
#include <sys/buf.h>
#include <sys/fcntl.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/timeout.h>
#include <machine/cpu.h>
#include <machine/intr.h>
#include <machine/bus.h>
#include <machine/cpufunc.h>
#include <sys/audioio.h>
#include <dev/audio_if.h>
#include <dev/mulaw.h>
#include <dev/auconv.h>
#include <dev/isa/isavar.h>
#include <dev/isa/isadmavar.h>
#include <dev/ic/ics2101reg.h>
#include <dev/ic/cs4231reg.h>
#include <dev/ic/ad1848reg.h>
#include <dev/isa/ics2101var.h>
#include <dev/isa/ad1848var.h>
#include <dev/isa/cs4231var.h>
#include "gusreg.h"
#include "gusvar.h"
/*
* ISA bus driver routines
*/
int gus_isa_match(struct device *, void *, void *);
void gus_isa_attach(struct device *, struct device *, void *);
struct cfattach gus_isa_ca = {
sizeof(struct gus_softc), gus_isa_match, gus_isa_attach,
};
int
gus_isa_match(parent, match, aux)
struct device *parent;
void *match;
void *aux;
{
struct isa_attach_args *ia = aux;
int iobase = ia->ia_iobase;
int recdrq = ia->ia_drq2;
/*
* Before we do anything else, make sure requested IRQ and DRQ are
* valid for this card.
*/
/* XXX range check before indexing!! */
if (ia->ia_irq == IRQUNK || gus_irq_map[ia->ia_irq] == IRQUNK) {
DPRINTF(("gus: invalid irq %d, card not probed\n", ia->ia_irq));
return 0;
}
if (ia->ia_drq == DRQUNK || gus_drq_map[ia->ia_drq] == DRQUNK) {
DPRINTF(("gus: invalid drq %d, card not probed\n", ia->ia_drq));
return 0;
}
if (recdrq != DRQUNK) {
if (recdrq > 7 || gus_drq_map[recdrq] == DRQUNK) {
DPRINTF(("gus: invalid second DMA channel (%d), card not probed\n", recdrq));
return 0;
}
} else
recdrq = ia->ia_drq;
if (iobase == IOBASEUNK) {
int i;
for(i = 0; i < gus_addrs; i++)
if (gus_test_iobase(ia->ia_iot, gus_base_addrs[i])) {
iobase = gus_base_addrs[i];
goto done;
}
return 0;
} else if (!gus_test_iobase(ia->ia_iot, iobase))
return 0;
done:
if ((ia->ia_drq != -1 && !isa_drq_isfree(parent, ia->ia_drq)) ||
(recdrq != -1 && !isa_drq_isfree(parent, recdrq)))
return 0;
ia->ia_iobase = iobase;
ia->ia_iosize = GUS_NPORT1;
return 1;
}
/*
* Setup the GUS for use; called shortly after probe
*/
void
gus_isa_attach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct gus_softc *sc = (void *) self;
struct isa_attach_args *ia = aux;
sc->sc_iot = ia->ia_iot;
sc->sc_iobase = ia->ia_iobase;
/* Map i/o space */
if (bus_space_map(sc->sc_iot, sc->sc_iobase, GUS_NPORT1, 0, &sc->sc_ioh1))
panic("%s: can't map io port range 1", self->dv_xname);
if (bus_space_map(sc->sc_iot, sc->sc_iobase+GUS_IOH2_OFFSET, GUS_NPORT2, 0,
&sc->sc_ioh2))
panic("%s: can't map io port range 2", self->dv_xname);
/* XXX Maybe we shouldn't fail on mapping this, but just assume
* the card is of revision 0? */
if (bus_space_map(sc->sc_iot, sc->sc_iobase+GUS_IOH3_OFFSET, GUS_NPORT3, 0,
&sc->sc_ioh3))
panic("%s: can't map io port range 3", self->dv_xname);
if (bus_space_map(sc->sc_iot, sc->sc_iobase+GUS_IOH4_OFFSET, GUS_NPORT4, 0,
&sc->sc_ioh4))
panic("%s: can't map io port range 4", self->dv_xname);
sc->sc_irq = ia->ia_irq;
sc->sc_drq = ia->ia_drq;
sc->sc_recdrq = ia->ia_drq2;
sc->sc_isa = parent;
gus_subattach(sc, aux);
}
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