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staging: Add export.h for THIS_MODULE/EXPORT_SYMBOL to drivers/staging users.
[mv-sheeva.git] / 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 static int line6_index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
20 static char *line6_id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
21
22 /*
23         Initialize the Line6 USB audio system.
24 */
25 int 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 */
50 int 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 */
64 void 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 }