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