root/include/sound/initval.h

INCLUDED FROM

DEFINITIONS

1. snd_legacy_find_free_ioport
2. snd_legacy_empty_irq_handler
3. snd_legacy_find_free_irq
4. snd_legacy_find_free_dma

   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
  40 static 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 
  56 static irqreturn_t snd_legacy_empty_irq_handler(int irq, void *dev_id)
  57 {
  58         return IRQ_HANDLED;
  59 }
  60 
  61 static 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
  77 static 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 */