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/* $OpenBSD: mpu_isa.c,v 1.4 2009/03/29 21:53:52 sthen Exp $ */
/*
* Copyright (c) 2002 Sergey Smitienko. 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. 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 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.
*/
#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 <machine/bus.h>
#include <sys/audioio.h>
#include <dev/audio_if.h>
#include <dev/midi_if.h>
#include <dev/isa/isavar.h>
#include <dev/isa/isadmavar.h>
#include <dev/ic/mpuvar.h>
int mpu_isa_match(struct device *, void *, void *);
void mpu_isa_attach(struct device *, struct device *, void *);
int mpu_test(bus_space_tag_t, int);
#ifdef AUDIO_DEBUG
#define DPRINTF(x) if (mpu_debug) printf x
int mpu_debug = 0;
#else
#define DPRINTF(x)
#endif
#define MPU_GETSTATUS(iot, ioh) (bus_space_read_1(iot, ioh, MPU_STATUS))
struct mpu_isa_softc {
struct device sc_dev;
struct mpu_softc sc_mpu;
};
struct cfattach mpu_isa_ca = {
sizeof(struct mpu_isa_softc), mpu_isa_match, mpu_isa_attach
};
int
mpu_test (iot, iobase)
bus_space_tag_t iot;
int iobase; /* base port number to try */
{
bus_space_handle_t ioh;
int i, rc;
rc = 0;
if (bus_space_map(iot, iobase, MPU401_NPORT, 0, &ioh)) {
DPRINTF(("mpu_test: can't map: %x/2\n", iobase));
return (0);
}
DPRINTF(("mpu_test: trying: %x\n", iobase));
/*
* The following code is a shameless copy of mpu401.c
* it is here until a redesign of mpu_find() interface
*/
if (MPU_GETSTATUS(iot, ioh) == 0xff)
goto done;
for (i = 0; i < MPU_MAXWAIT; i++) {
if (!(MPU_GETSTATUS(iot, ioh) & MPU_OUTPUT_BUSY)) {
rc = 1;
break;
}
delay (10);
}
if (rc == 1) {
bus_space_write_1(iot, ioh, MPU_COMMAND, MPU_RESET);
rc = 0;
for (i = 0; i < 2 * MPU_MAXWAIT; i++)
if (!(MPU_GETSTATUS(iot, ioh) & MPU_INPUT_EMPTY) &&
bus_space_read_1(iot, ioh, MPU_DATA) == MPU_ACK) {
rc = 1;
break;
}
}
done:
bus_space_unmap(iot, ioh, MPU401_NPORT);
return (rc);
}
int
mpu_isa_match(parent, match, aux)
struct device *parent;
void *match, *aux;
{
struct isa_attach_args *ia = aux;
if (mpu_test(ia->ia_iot, ia->ia_iobase)) {
ia->ia_iosize = MPU401_NPORT;
return (1);
}
return (0);
}
void
mpu_isa_attach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct mpu_isa_softc *sc = (struct mpu_isa_softc *)self;
struct isa_attach_args *ia = aux;
sc->sc_mpu.iot = ia->ia_iot;
if (bus_space_map (ia->ia_iot, ia->ia_iobase, MPU401_NPORT,
0, &sc->sc_mpu.ioh)) {
printf(": can't map i/o space\n");
return;
}
if (!mpu_find(&sc->sc_mpu)) {
printf(": find failed\n");
return;
}
printf(": generic MPU-401 compatible\n");
midi_attach_mi(&mpu_midi_hw_if, &sc->sc_mpu, &sc->sc_dev);
}
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