Root/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
19static int line6_index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
20static char *line6_id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
21
22/*
23    Initialize the Line6 USB audio system.
24*/
25int line6_init_audio(struct usb_line6 *line6)
26{
27    static int dev;
28    struct snd_card *card;
29    int err;
30
31    err = snd_card_create(line6_index[dev], line6_id[dev], THIS_MODULE, 0,
32                  &card);
33    if (err < 0)
34        return err;
35
36    line6->card = card;
37
38    strcpy(card->id, line6->properties->id);
39    strcpy(card->driver, DRIVER_NAME);
40    strcpy(card->shortname, line6->properties->name);
41    /* longname is 80 chars - see asound.h */
42    sprintf(card->longname, "Line6 %s at USB %s", line6->properties->name,
43        dev_name(line6->ifcdev));
44    return 0;
45}
46
47/*
48    Register the Line6 USB audio system.
49*/
50int line6_register_audio(struct usb_line6 *line6)
51{
52    int err;
53
54    err = snd_card_register(line6->card);
55    if (err < 0)
56        return err;
57
58    return 0;
59}
60
61/*
62    Cleanup the Line6 USB audio system.
63*/
64void line6_cleanup_audio(struct usb_line6 *line6)
65{
66    struct snd_card *card = line6->card;
67
68    if (card == NULL)
69        return;
70
71    snd_card_disconnect(card);
72    snd_card_free(card);
73    line6->card = NULL;
74}
75

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