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* sound/midibuf.c
*
* Device file manager for /dev/midi
*
* NOTE! This part of the driver is currently just a stub.
*
* Copyright by Hannu Savolainen 1993
*
* 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 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 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 "sound_config.h"
#if defined(CONFIGURE_SOUNDCARD) && !defined(EXCLUDE_MPU401)
#if 0
#include "midiioctl.h"
#include "midivar.h"
#endif
static int midibuf_busy = 0;
int
MIDIbuf_open (int dev, struct fileinfo *file)
{
int mode, err;
dev = dev >> 4;
mode = file->mode & O_ACCMODE;
if (midibuf_busy)
return RET_ERROR (EBUSY);
if (!mpu401_dev)
{
printk ("Midi: MPU-401 compatible Midi interface not present\n");
return RET_ERROR (ENXIO);
}
if ((err = midi_devs[mpu401_dev]->open (mpu401_dev, mode, NULL, NULL)) < 0)
return err;
midibuf_busy = 1;
return RET_ERROR (ENXIO);
}
void
MIDIbuf_release (int dev, struct fileinfo *file)
{
int mode;
dev = dev >> 4;
mode = file->mode & O_ACCMODE;
midi_devs[mpu401_dev]->close (mpu401_dev);
midibuf_busy = 0;
}
int
MIDIbuf_write (int dev, struct fileinfo *file, snd_rw_buf * buf, int count)
{
dev = dev >> 4;
return count;
}
int
MIDIbuf_read (int dev, struct fileinfo *file, snd_rw_buf * buf, int count)
{
dev = dev >> 4;
return RET_ERROR (EIO);
}
int
MIDIbuf_ioctl (int dev, struct fileinfo *file,
unsigned int cmd, unsigned int arg)
{
dev = dev >> 4;
switch (cmd)
{
default:
return midi_devs[0]->ioctl (dev, cmd, arg);
}
}
void
MIDIbuf_bytes_received (int dev, unsigned char *buf, int count)
{
}
long
MIDIbuf_init (long mem_start)
{
return mem_start;
}
#endif
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