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Release 4.12 include/sound/hwdep.h

Directory: include/sound
#ifndef __SOUND_HWDEP_H

#define __SOUND_HWDEP_H

 *  Hardware dependent layer 
 *  Copyright (c) by Jaroslav Kysela <>
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   GNU General Public License for more details.
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA

#include <sound/asound.h>
#include <linux/poll.h>

struct snd_hwdep;

/* hwdep file ops; all ops can be NULL */

struct snd_hwdep_ops {
long long (*llseek)(struct snd_hwdep *hw, struct file *file,
			    long long offset, int orig);
long (*read)(struct snd_hwdep *hw, char __user *buf,
		     long count, loff_t *offset);
long (*write)(struct snd_hwdep *hw, const char __user *buf,
		      long count, loff_t *offset);
int (*open)(struct snd_hwdep *hw, struct file * file);
int (*release)(struct snd_hwdep *hw, struct file * file);
unsigned int (*poll)(struct snd_hwdep *hw, struct file *file,
			     poll_table *wait);
int (*ioctl)(struct snd_hwdep *hw, struct file *file,
		     unsigned int cmd, unsigned long arg);
int (*ioctl_compat)(struct snd_hwdep *hw, struct file *file,
			    unsigned int cmd, unsigned long arg);
int (*mmap)(struct snd_hwdep *hw, struct file *file,
		    struct vm_area_struct *vma);
int (*dsp_status)(struct snd_hwdep *hw,
			  struct snd_hwdep_dsp_status *status);
int (*dsp_load)(struct snd_hwdep *hw,
			struct snd_hwdep_dsp_image *image);

struct snd_hwdep {
struct snd_card *card;
struct list_head list;
int device;
char id[32];
char name[80];
int iface;

int oss_type;
int ossreg;

struct snd_hwdep_ops ops;
wait_queue_head_t open_wait;
void *private_data;
void (*private_free) (struct snd_hwdep *hwdep);
struct device dev;

struct mutex open_mutex;
int used;			/* reference counter */
unsigned int dsp_loaded;	/* bit fields of loaded dsp indices */
unsigned int exclusive:1;	/* exclusive access mode */

extern int snd_hwdep_new(struct snd_card *card, char *id, int device,
			 struct snd_hwdep **rhwdep);

#endif /* __SOUND_HWDEP_H */

Overall Contributors

Jaroslav Kysela31784.76%440.00%
Takashi Iwai5013.37%330.00%
Clemens Ladisch41.07%110.00%
Al Viro20.53%110.00%
Ingo Molnar10.27%110.00%
Directory: include/sound
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