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         int err;
  31
  32         err = snd_card_create(line6_index[dev], line6_id[dev], THIS_MODULE, 0,
  33                               &card);
  34         if (err < 0)
  35                 return err;
  36
  37         line6->card = card;
  38
  39         strcpy(card->driver, DRIVER_NAME);
  40         strcpy(card->shortname, "Line6-USB");
  41         sprintf(card->longname, "Line6 %s at USB %s", line6->properties->name,
  42                 dev_name(line6->ifcdev));  /* 80 chars - see asound.h */
  43         return 0;
  44 }
  45
  46 /*
  47         Register the Line6 USB audio system.
  48 */
  49 int line6_register_audio(struct usb_line6 *line6)
  50 {
  51         int err;
  52
  53         err = snd_card_register(line6->card);
  54         if (err < 0)
  55                 return err;
  56
  57         return 0;
  58 }
  59
  60 /*
  61         Cleanup the Line6 USB audio system.
  62 */
  63 void line6_cleanup_audio(struct usb_line6 *line6)
  64 {
  65         struct snd_card *card = line6->card;
  66
  67         if (card == NULL)
  68                 return;
  69
  70         snd_card_disconnect(card);
  71         snd_card_free(card);
  72         line6->card = NULL;
  73 }