Root/include/sound/hwdep.h

1#ifndef __SOUND_HWDEP_H
2#define __SOUND_HWDEP_H
3
4/*
5 * Hardware dependent layer
6 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
7 *
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 *
23 */
24
25#include <sound/asound.h>
26#include <linux/poll.h>
27
28struct snd_hwdep;
29
30/* hwdep file ops; all ops can be NULL */
31struct snd_hwdep_ops {
32    long long (*llseek)(struct snd_hwdep *hw, struct file *file,
33                long long offset, int orig);
34    long (*read)(struct snd_hwdep *hw, char __user *buf,
35             long count, loff_t *offset);
36    long (*write)(struct snd_hwdep *hw, const char __user *buf,
37              long count, loff_t *offset);
38    int (*open)(struct snd_hwdep *hw, struct file * file);
39    int (*release)(struct snd_hwdep *hw, struct file * file);
40    unsigned int (*poll)(struct snd_hwdep *hw, struct file *file,
41                 poll_table *wait);
42    int (*ioctl)(struct snd_hwdep *hw, struct file *file,
43             unsigned int cmd, unsigned long arg);
44    int (*ioctl_compat)(struct snd_hwdep *hw, struct file *file,
45                unsigned int cmd, unsigned long arg);
46    int (*mmap)(struct snd_hwdep *hw, struct file *file,
47            struct vm_area_struct *vma);
48    int (*dsp_status)(struct snd_hwdep *hw,
49              struct snd_hwdep_dsp_status *status);
50    int (*dsp_load)(struct snd_hwdep *hw,
51            struct snd_hwdep_dsp_image *image);
52};
53
54struct snd_hwdep {
55    struct snd_card *card;
56    struct list_head list;
57    int device;
58    char id[32];
59    char name[80];
60    int iface;
61
62#ifdef CONFIG_SND_OSSEMUL
63    char oss_dev[32];
64    int oss_type;
65    int ossreg;
66#endif
67
68    struct snd_hwdep_ops ops;
69    wait_queue_head_t open_wait;
70    void *private_data;
71    void (*private_free) (struct snd_hwdep *hwdep);
72
73    struct mutex open_mutex;
74    int used; /* reference counter */
75    unsigned int dsp_loaded; /* bit fields of loaded dsp indices */
76    unsigned int exclusive:1; /* exclusive access mode */
77};
78
79extern int snd_hwdep_new(struct snd_card *card, char *id, int device,
80             struct snd_hwdep **rhwdep);
81
82#endif /* __SOUND_HWDEP_H */
83

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