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 
28 struct snd_hwdep;
29 
30 /* hwdep file ops; all ops can be NULL */
31 struct 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 	__poll_t (*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 
54 struct 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 
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 
79 extern int snd_hwdep_new(struct snd_card *card, char *id, int device,
80 			 struct snd_hwdep **rhwdep);
81 
82 #endif /* __SOUND_HWDEP_H */
83