LXR linux/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*/
  22int 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*/
  46int 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*/
  60void 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}
  71