drivers/staging/line6/audio.c

   1 /*
   2  * Line6 Linux USB driver - 0.8.0
   3  *
   4  * Copyright (C) 2004-2009 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 "driver.h"
  13 #include "audio.h"
  14
  15 #include <sound/core.h>
  16 #include <sound/initval.h>
  17
  18
  19 static int line6_index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
  20 static char *line6_id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
  21
  22
  23 /*
  24         Initialize the Line6 USB audio system.
  25 */
  26 int line6_init_audio(struct usb_line6 *line6)
  27 {
  28         static int dev;
  29         struct snd_card *card;
  30
  31         card = snd_card_new(line6_index[dev], line6_id[dev], THIS_MODULE, 0);
  32
  33         if (card == NULL)
  34                 return -ENOMEM;
  35
  36         line6->card = card;
  37
  38         strcpy(card->driver, DRIVER_NAME);
  39         strcpy(card->shortname, "Line6-USB");
  40         sprintf(card->longname, "Line6 %s at USB %s", line6->properties->name,
  41                 dev_name(line6->ifcdev));  /* 80 chars - see asound.h */
  42         return 0;
  43 }
  44
  45 /*
  46         Register the Line6 USB audio system.
  47 */
  48 int line6_register_audio(struct usb_line6 *line6)
  49 {
  50         int err;
  51
  52         err = snd_card_register(line6->card);
  53         if (err < 0)
  54                 return err;
  55
  56         return 0;
  57 }
  58
  59 /*
  60         Cleanup the Line6 USB audio system.
  61 */
  62 void line6_cleanup_audio(struct usb_line6 *line6)
  63 {
  64         struct snd_card *card = line6->card;
  65
  66         if (card == NULL)
  67                 return;
  68
  69         snd_card_disconnect(card);
  70         snd_card_free(card);
  71         line6->card = NULL;
  72 }