drivers/staging/line6/audio.c

   1 /*
   2  * Line6 Linux USB driver - 0.9.1beta
   3  *
   4  * Copyright (C) 2004-2010 Markus Grabner (grabner@icg.tugraz.at)
   5  *
   6  *      This program is free software; you can redistribute it and/or
   7  *      modify it under the terms of the GNU General Public License as
   8  *      published by the Free Software Foundation, version 2.
   9  *
  10  */
  11
  12 #include <sound/core.h>
  13 #include <sound/initval.h>
  14 #include <linux/export.h>
  15
  16 #include "driver.h"
  17 #include "audio.h"
  18
  19 static int line6_index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
  20 static char *line6_id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
  21
  22 /*
  23         Initialize the Line6 USB audio system.
  24 */
  25 int line6_init_audio(struct usb_line6 *line6)
  26 {
  27         static int dev;
  28         struct snd_card *card;
  29         int err;
  30
  31         err = snd_card_create(line6_index[dev], line6_id[dev], THIS_MODULE, 0,
  32                               &card);
  33         if (err < 0)
  34                 return err;
  35
  36         line6->card = card;
  37
  38         strcpy(card->id, line6->properties->id);
  39         strcpy(card->driver, DRIVER_NAME);
  40         strcpy(card->shortname, line6->properties->name);
  41         /* longname is 80 chars - see asound.h */
  42         sprintf(card->longname, "Line6 %s at USB %s", line6->properties->name,
  43                 dev_name(line6->ifcdev));
  44         return 0;
  45 }
  46
  47 /*
  48         Register the Line6 USB audio system.
  49 */
  50 int line6_register_audio(struct usb_line6 *line6)
  51 {
  52         int err;
  53
  54         err = snd_card_register(line6->card);
  55         if (err < 0)
  56                 return err;
  57
  58         return 0;
  59 }
  60
  61 /*
  62         Cleanup the Line6 USB audio system.
  63 */
  64 void line6_cleanup_audio(struct usb_line6 *line6)
  65 {
  66         struct snd_card *card = line6->card;
  67
  68         if (card == NULL)
  69                 return;
  70
  71         snd_card_disconnect(card);
  72         snd_card_free(card);
  73         line6->card = NULL;
  74 }