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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
-