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	int oss_type;
64	int ossreg;
65#endif
66
67	struct snd_hwdep_ops ops;
68	wait_queue_head_t open_wait;
69	void *private_data;
70	void (*private_free) (struct snd_hwdep *hwdep);
71	struct device *dev;
72	const struct attribute_group **groups;
73
74	struct mutex open_mutex;
75	int used;			/* reference counter */
76	unsigned int dsp_loaded;	/* bit fields of loaded dsp indices */
77	unsigned int exclusive:1;	/* exclusive access mode */
78};
79
80extern int snd_hwdep_new(struct snd_card *card, char *id, int device,
81			 struct snd_hwdep **rhwdep);
82
83#endif /* __SOUND_HWDEP_H */
84