dev_table.c

freebsd v4.4内核源码

/*
 * sound/dev_table.c
 *
 * Device call tables.
 *
 * 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.
 *
 */

#define _DEV_TABLE_C_
#include <i386/isa/sound/sound_config.h>

#ifdef CONFIGURE_SOUNDCARD

int
snd_find_driver (int type)
{
  int             i, n = sizeof (sound_drivers) / sizeof (struct driver_info);

  for (i = 0; i < (n - 1); i++)
    if (sound_drivers[i].card_type == type)
      return i;

  return -1;			/*
				 * Not found
				 */
}

static long
sndtable_init (long mem_start)
{
  int             i, n = sizeof (snd_installed_cards) / sizeof (struct card_info);
  int             drv;

  printk ("Sound initialization started\n");

  for (i = 0; i < (n - 1); i++)
    if (snd_installed_cards[i].enabled)
      if ((drv = snd_find_driver (snd_installed_cards[i].card_type)) == -1)
	snd_installed_cards[i].enabled = 0;	/*
						 * Mark as not detected
						 */
      else if (sound_drivers[drv].probe (&snd_installed_cards[i].config))
	{
#ifndef SHORT_BANNERS
	  printk ("snd%d",
		  snd_installed_cards[i].card_type);
#endif

	  mem_start = sound_drivers[drv].attach (mem_start, &snd_installed_cards[i].config);
#ifndef SHORT_BANNERS
	  printk (" at 0x%x irq %d drq %d\n",
		  snd_installed_cards[i].config.io_base,
		  snd_installed_cards[i].config.irq,
		  snd_installed_cards[i].config.dma);
#endif
	}
      else
	snd_installed_cards[i].enabled = 0;	/*
						 * Mark as not detected
						 */
  printk ("Sound initialization complete\n");
  return mem_start;
}

int
sndtable_probe (int unit, struct address_info *hw_config)
{
  int             i, n = sizeof (snd_installed_cards) / sizeof (struct card_info);

  if (!unit)
    return TRUE;

  for (i = 0; i < (n - 1); i++)
    if (snd_installed_cards[i].enabled)
      if (snd_installed_cards[i].card_type == unit)
	{
	  int             drv;

	  snd_installed_cards[i].config.io_base = hw_config->io_base;
	  snd_installed_cards[i].config.irq = hw_config->irq;
	  snd_installed_cards[i].config.dma = hw_config->dma;
	  if ((drv = snd_find_driver (snd_installed_cards[i].card_type)) == -1)
	    snd_installed_cards[i].enabled = 0;		/*
							 * Mark as not
							 * detected
							 */
	  else if (sound_drivers[drv].probe (hw_config))
	    return 1;
	  snd_installed_cards[i].enabled = 0;	/*
						 * Mark as not detected
						 */
	  return 0;
	}

  return FALSE;
}

int
sndtable_init_card (int unit, struct address_info *hw_config)
{
  int             i, n = sizeof (snd_installed_cards) / sizeof (struct card_info);

  if (!unit)
    {
      if (sndtable_init (0) != 0)
	panic ("snd: Invalid memory allocation\n");
      return TRUE;
    }

  for (i = 0; i < (n - 1); i++)
    if (snd_installed_cards[i].card_type == unit)
      {
	int             drv;

	snd_installed_cards[i].config.io_base = hw_config->io_base;
	snd_installed_cards[i].config.irq = hw_config->irq;
	snd_installed_cards[i].config.dma = hw_config->dma;

	if ((drv = snd_find_driver (snd_installed_cards[i].card_type)) == -1)
	  snd_installed_cards[i].enabled = 0;	/*
						 * Mark as not detected
						 */
	else if (sound_drivers[drv].attach (0, hw_config) != 0)
	  panic ("snd#: Invalid memory allocation\n");
	return TRUE;
      }

  return FALSE;
}

int
sndtable_get_cardcount (void)
{
  return num_audiodevs + num_mixers + num_synths + num_midis;
}

struct address_info *
sound_getconf (int card_type)
{
  int             j, ptr;
  int             n = sizeof (snd_installed_cards) / sizeof (struct card_info);

  ptr = -1;
  for (j = 0; j < n && ptr == -1; j++)
    if (snd_installed_cards[j].card_type == card_type)
      ptr = j;

  if (ptr == -1)
    return (struct address_info *) NULL;

  return &snd_installed_cards[ptr].config;
}

#else

void
sound_setup (char *str, int *ints)
{
}

#endif