root/include/sound/initval.h

INCLUDED FROM

DEFINITIONS

1. snd_legacy_empty_irq_handler
2. snd_legacy_find_free_irq
3. snd_legacy_find_free_dma

#ifndef __SOUND_INITVAL_H
#define __SOUND_INITVAL_H

/*
 *  Init values for soundcard modules
 *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 *
 */

#define SNDRV_AUTO_PORT         1
#define SNDRV_AUTO_IRQ          0xffff
#define SNDRV_AUTO_DMA          0xffff
#define SNDRV_AUTO_DMA_SIZE     (0x7fffffff)

#define SNDRV_DEFAULT_IDX1      (-1)
#define SNDRV_DEFAULT_STR1      NULL
#define SNDRV_DEFAULT_ENABLE1   1
#define SNDRV_DEFAULT_PORT1     SNDRV_AUTO_PORT
#define SNDRV_DEFAULT_IRQ1      SNDRV_AUTO_IRQ
#define SNDRV_DEFAULT_DMA1      SNDRV_AUTO_DMA
#define SNDRV_DEFAULT_DMA_SIZE1 SNDRV_AUTO_DMA_SIZE
#define SNDRV_DEFAULT_PTR1      SNDRV_DEFAULT_STR1

#define SNDRV_DEFAULT_IDX       { [0 ... (SNDRV_CARDS-1)] = -1 }
#define SNDRV_DEFAULT_STR       { [0 ... (SNDRV_CARDS-1)] = NULL }
#define SNDRV_DEFAULT_ENABLE    { 1, [1 ... (SNDRV_CARDS-1)] = 0 }
#define SNDRV_DEFAULT_ENABLE_PNP { [0 ... (SNDRV_CARDS-1)] = 1 }
#ifdef CONFIG_PNP
#define SNDRV_DEFAULT_ENABLE_ISAPNP SNDRV_DEFAULT_ENABLE_PNP
#else
#define SNDRV_DEFAULT_ENABLE_ISAPNP SNDRV_DEFAULT_ENABLE
#endif
#define SNDRV_DEFAULT_PORT      { [0 ... (SNDRV_CARDS-1)] = SNDRV_AUTO_PORT }
#define SNDRV_DEFAULT_IRQ       { [0 ... (SNDRV_CARDS-1)] = SNDRV_AUTO_IRQ }
#define SNDRV_DEFAULT_DMA       { [0 ... (SNDRV_CARDS-1)] = SNDRV_AUTO_DMA }
#define SNDRV_DEFAULT_DMA_SIZE  { [0 ... (SNDRV_CARDS-1)] = SNDRV_AUTO_DMA_SIZE }
#define SNDRV_DEFAULT_PTR       SNDRV_DEFAULT_STR

#ifdef SNDRV_LEGACY_FIND_FREE_IRQ
#include <linux/interrupt.h>

static irqreturn_t snd_legacy_empty_irq_handler(int irq, void *dev_id)
{
        return IRQ_HANDLED;
}

static int snd_legacy_find_free_irq(int *irq_table)
{
        while (*irq_table != -1) {
                if (!request_irq(*irq_table, snd_legacy_empty_irq_handler,
                                 IRQF_DISABLED | IRQF_PROBE_SHARED, "ALSA Test IRQ",
                                 (void *) irq_table)) {
                        free_irq(*irq_table, (void *) irq_table);
                        return *irq_table;
                }
                irq_table++;
        }
        return -1;
}
#endif

#ifdef SNDRV_LEGACY_FIND_FREE_DMA
static int snd_legacy_find_free_dma(int *dma_table)
{
        while (*dma_table != -1) {
                if (!request_dma(*dma_table, "ALSA Test DMA")) {
                        free_dma(*dma_table);
                        return *dma_table;
                }
                dma_table++;
        }
        return -1;
}
#endif

#endif /* __SOUND_INITVAL_H */