xref: /openbmc/linux/include/sound/hwdep.h (revision d5cb9783536a41df9f9cba5b0a1d78047ed787f7)
1 #ifndef __SOUND_HWDEP_H
2 #define __SOUND_HWDEP_H
3 
4 /*
5  *  Hardware dependent layer
6  *  Copyright (c) by Jaroslav Kysela <perex@suse.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 typedef enum sndrv_hwdep_iface snd_hwdep_iface_t;
29 typedef struct sndrv_hwdep_info snd_hwdep_info_t;
30 typedef struct sndrv_hwdep_dsp_status snd_hwdep_dsp_status_t;
31 typedef struct sndrv_hwdep_dsp_image snd_hwdep_dsp_image_t;
32 
33 typedef struct _snd_hwdep_ops {
34 	long long (*llseek) (snd_hwdep_t *hw, struct file * file, long long offset, int orig);
35 	long (*read) (snd_hwdep_t * hw, char __user *buf, long count, loff_t *offset);
36 	long (*write) (snd_hwdep_t * hw, const char __user *buf, long count, loff_t *offset);
37 	int (*open) (snd_hwdep_t * hw, struct file * file);
38 	int (*release) (snd_hwdep_t * hw, struct file * file);
39 	unsigned int (*poll) (snd_hwdep_t * hw, struct file * file, poll_table * wait);
40 	int (*ioctl) (snd_hwdep_t * hw, struct file * file, unsigned int cmd, unsigned long arg);
41 	int (*ioctl_compat) (snd_hwdep_t * hw, struct file * file, unsigned int cmd, unsigned long arg);
42 	int (*mmap) (snd_hwdep_t * hw, struct file * file, struct vm_area_struct * vma);
43 	int (*dsp_status) (snd_hwdep_t * hw, snd_hwdep_dsp_status_t * status);
44 	int (*dsp_load) (snd_hwdep_t * hw, snd_hwdep_dsp_image_t * image);
45 } snd_hwdep_ops_t;
46 
47 struct _snd_hwdep {
48 	snd_card_t *card;
49 	int device;
50 	char id[32];
51 	char name[80];
52 	int iface;
53 
54 #ifdef CONFIG_SND_OSSEMUL
55 	char oss_dev[32];
56 	int oss_type;
57 	int ossreg;
58 #endif
59 
60 	snd_hwdep_ops_t ops;
61 	wait_queue_head_t open_wait;
62 	void *private_data;
63 	void (*private_free) (snd_hwdep_t *hwdep);
64 
65 	struct semaphore open_mutex;
66 	int used;
67 	unsigned int dsp_loaded;
68 	unsigned int exclusive: 1;
69 };
70 
71 extern int snd_hwdep_new(snd_card_t * card, char *id, int device, snd_hwdep_t ** rhwdep);
72 
73 #endif /* __SOUND_HWDEP_H */
74