freebsd-nq/sys/i386/isa/sound/pro_midi.c

/*
 * Copyright by UWM - comments to soft-eng@cs.uwm.edu
 *
 * 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.
 *
 * $Id$
 */
#define ALL_EXTERNAL_TO_ME
#include "sound_config.h"

#ifdef CONFIGURE_SOUNDCARD

#include "pas.h"
#define ESUCCESS 0

#if !defined(EXCLUDE_PRO_MIDI) && !defined(EXCLUDE_CHIP_MIDI)


/** Structure for handling operations **/


static struct generic_midi_operations pro_midi_operations =
{

  {"Pro_Audio_Spectrum 16 MV101", 0},
  pro_midi_open,
  pro_midi_close,
  pro_midi_write,
  pro_midi_read
};

/*
 * Note! Note! Note! Follow the same model for any other attach function you
 * may write
 */

long
pro_midi_attach (long mem_start)
{
  pro_midi_dev = num_generic_midis;
  generic_midi_devs[num_generic_midis++] = &pro_midi_operations;
  return mem_start;
}

int
pro_midi_open (int dev, int mode)
{

  int             intr_mask, s;


  s = splhigh ();


  /* Reset the input and output FIFO pointers */


  outb (MIDI_CONTROL, M_C_RESET_INPUT_FIFO | M_C_RESET_OUTPUT_FIFO);

  /* Get the interrupt status */

  intr_mask = inb (INTERRUPT_MASK);


  /* Enable MIDI IRQ */

  intr_mask |= I_M_MIDI_IRQ_ENABLE;
  outb (INTERRUPT_MASK, intr_mask);


  /* Enable READ/WRITE on MIDI port. This part is quite unsure though */

  outb (MIDI_CONTROL, M_C_ENA_OUTPUT_IRQ | M_C_ENA_INPUT_IRQ);

  /* Acknowledge pending interrupts */

  outb (MIDI_STATUS, 0xff);


  splx (s);

  return (ESUCCESS);


}


void
pro_midi_close (int dev)
{

  int             intr_mask;

  /* Clean up */

  outb (MIDI_CONTROL, M_C_RESET_INPUT_FIFO | M_C_RESET_OUTPUT_FIFO);
  intr_mask = inb (INTERRUPT_MASK);
  intr_mask &= ~I_M_MIDI_IRQ_ENABLE;
  outb (INTERRUPT_MASK, intr_mask);

  return;
}

int
pro_midi_write (int dev, struct uio *uio)
{

  int             s;
  unsigned char   data;

  /* printf("midi: Going to do write routine..\n"); */
  while (uio->uio_resid)
    {

      if (uiomove (&data, 1, uio))
	return (ENOTTY);

      s = splhigh ();

      DELAY (30);
      outb (MIDI_DATA, data);
      DELAY (70);		/* Ze best pause.. find a better one if you
				 * can :) */
      splx (s);
    }

  return (ESUCCESS);

}


int
pro_midi_read (int dev, struct uio *uio)
{

  int             s;
  unsigned char   data;

  s = splhigh ();

  /* For each uio_iov[] entry .... */

  while (uio->uio_resid)
    {

      if (((inb (MIDI_STATUS) & M_S_INPUT_AVAIL) == 0) &&
	  ((inb (MIDI_FIFO_STATUS) & MIDI_INPUT_AVAILABLE) == 0))

	data = 0xfe;
      else
	data = inb (MIDI_DATA);

      if (uiomove (&data, 1, uio))
	{

	  printf ("midi: Bad copyout()!\n");
	  return (ENOTTY);

	}

    }
  splx (s);
  return (ESUCCESS);

}

#endif

#endif