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 /*
  20         Initialize the Line6 USB audio system.
  21 */
  22 int line6_init_audio(struct usb_line6 *line6)
  23 {
  24         struct snd_card *card;
  25         int err;
  26
  27         err = snd_card_new(line6->ifcdev,
  28                            SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
  29                            THIS_MODULE, 0, &card);
  30         if (err < 0)
  31                 return err;
  32
  33         line6->card = card;
  34
  35         strcpy(card->id, line6->properties->id);
  36         strcpy(card->driver, DRIVER_NAME);
  37         strcpy(card->shortname, line6->properties->name);
  38         /* longname is 80 chars - see asound.h */
  39         sprintf(card->longname, "Line6 %s at USB %s", line6->properties->name,
  40                 dev_name(line6->ifcdev));
  41         return 0;
  42 }
  43
  44 /*
  45         Register the Line6 USB audio system.
  46 */
  47 int line6_register_audio(struct usb_line6 *line6)
  48 {
  49         int err;
  50
  51         err = snd_card_register(line6->card);
  52         if (err < 0)
  53                 return err;
  54
  55         return 0;
  56 }
  57
  58 /*
  59         Cleanup the Line6 USB audio system.
  60 */
  61 void line6_cleanup_audio(struct usb_line6 *line6)
  62 {
  63         struct snd_card *card = line6->card;
  64
  65         if (card == NULL)
  66                 return;
  67
  68         snd_card_disconnect(card);
  69         snd_card_free(card);
  70         line6->card = NULL;
  71 }