linux/include/sound/initval.h
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   1/* SPDX-License-Identifier: GPL-2.0-or-later */
   2#ifndef __SOUND_INITVAL_H
   3#define __SOUND_INITVAL_H
   4
   5/*
   6 *  Init values for soundcard modules
   7 *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
   8 */
   9
  10#define SNDRV_AUTO_PORT         1
  11#define SNDRV_AUTO_IRQ          0xffff
  12#define SNDRV_AUTO_DMA          0xffff
  13#define SNDRV_AUTO_DMA_SIZE     (0x7fffffff)
  14
  15#define SNDRV_DEFAULT_IDX1      (-1)
  16#define SNDRV_DEFAULT_STR1      NULL
  17#define SNDRV_DEFAULT_ENABLE1   1
  18#define SNDRV_DEFAULT_PORT1     SNDRV_AUTO_PORT
  19#define SNDRV_DEFAULT_IRQ1      SNDRV_AUTO_IRQ
  20#define SNDRV_DEFAULT_DMA1      SNDRV_AUTO_DMA
  21#define SNDRV_DEFAULT_DMA_SIZE1 SNDRV_AUTO_DMA_SIZE
  22#define SNDRV_DEFAULT_PTR1      SNDRV_DEFAULT_STR1
  23
  24#define SNDRV_DEFAULT_IDX       { [0 ... (SNDRV_CARDS-1)] = -1 }
  25#define SNDRV_DEFAULT_STR       { [0 ... (SNDRV_CARDS-1)] = NULL }
  26#define SNDRV_DEFAULT_ENABLE    { 1, [1 ... (SNDRV_CARDS-1)] = 0 }
  27#define SNDRV_DEFAULT_ENABLE_PNP { [0 ... (SNDRV_CARDS-1)] = 1 }
  28#ifdef CONFIG_PNP
  29#define SNDRV_DEFAULT_ENABLE_ISAPNP SNDRV_DEFAULT_ENABLE_PNP
  30#else
  31#define SNDRV_DEFAULT_ENABLE_ISAPNP SNDRV_DEFAULT_ENABLE
  32#endif
  33#define SNDRV_DEFAULT_PORT      { [0 ... (SNDRV_CARDS-1)] = SNDRV_AUTO_PORT }
  34#define SNDRV_DEFAULT_IRQ       { [0 ... (SNDRV_CARDS-1)] = SNDRV_AUTO_IRQ }
  35#define SNDRV_DEFAULT_DMA       { [0 ... (SNDRV_CARDS-1)] = SNDRV_AUTO_DMA }
  36#define SNDRV_DEFAULT_DMA_SIZE  { [0 ... (SNDRV_CARDS-1)] = SNDRV_AUTO_DMA_SIZE }
  37#define SNDRV_DEFAULT_PTR       SNDRV_DEFAULT_STR
  38
  39#ifdef SNDRV_LEGACY_FIND_FREE_IOPORT
  40static long snd_legacy_find_free_ioport(long *port_table, long size)
  41{
  42        while (*port_table != -1) {
  43                if (request_region(*port_table, size, "ALSA test")) {
  44                        release_region(*port_table, size);
  45                        return *port_table;
  46                }
  47                port_table++;
  48        }
  49        return -1;
  50}
  51#endif
  52
  53#ifdef SNDRV_LEGACY_FIND_FREE_IRQ
  54#include <linux/interrupt.h>
  55
  56static irqreturn_t snd_legacy_empty_irq_handler(int irq, void *dev_id)
  57{
  58        return IRQ_HANDLED;
  59}
  60
  61static int snd_legacy_find_free_irq(int *irq_table)
  62{
  63        while (*irq_table != -1) {
  64                if (!request_irq(*irq_table, snd_legacy_empty_irq_handler,
  65                                 IRQF_PROBE_SHARED, "ALSA Test IRQ",
  66                                 (void *) irq_table)) {
  67                        free_irq(*irq_table, (void *) irq_table);
  68                        return *irq_table;
  69                }
  70                irq_table++;
  71        }
  72        return -1;
  73}
  74#endif
  75
  76#ifdef SNDRV_LEGACY_FIND_FREE_DMA
  77static int snd_legacy_find_free_dma(int *dma_table)
  78{
  79        while (*dma_table != -1) {
  80                if (!request_dma(*dma_table, "ALSA Test DMA")) {
  81                        free_dma(*dma_table);
  82                        return *dma_table;
  83                }
  84                dma_table++;
  85        }
  86        return -1;
  87}
  88#endif
  89
  90#endif /* __SOUND_INITVAL_H */
  91