124 lines
2.8 KiB
C
124 lines
2.8 KiB
C
/*
|
|
* 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
|