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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/include/sound/hwdep.h
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#ifndef __SOUND_HWDEP_H

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#define __SOUND_HWDEP_H

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/*

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 *  Hardware dependent layer 

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 *  Copyright (c) by Jaroslav Kysela <[email protected]>

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 *

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 *

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 *   This program is free software; you can redistribute it and/or modify

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 *   it under the terms of the GNU General Public License as published by

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 *   the Free Software Foundation; either version 2 of the License, or

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 *   (at your option) any later version.

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 *

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 *   This program is distributed in the hope that it will be useful,

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 *   but WITHOUT ANY WARRANTY; without even the implied warranty of

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 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

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 *   GNU General Public License for more details.

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 *

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 *   You should have received a copy of the GNU General Public License

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 *   along with this program; if not, write to the Free Software

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 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA

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 *

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 */

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#include <sound/asound.h>

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#include <linux/poll.h>

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struct snd_hwdep;

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

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struct snd_hwdep_ops {

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	long long (*llseek)(struct snd_hwdep *hw, struct file *file,

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			    long long offset, int orig);

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	long (*read)(struct snd_hwdep *hw, char __user *buf,

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		     long count, loff_t *offset);

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	long (*write)(struct snd_hwdep *hw, const char __user *buf,

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		      long count, loff_t *offset);

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	int (*open)(struct snd_hwdep *hw, struct file * file);

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	int (*release)(struct snd_hwdep *hw, struct file * file);

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	unsigned int (*poll)(struct snd_hwdep *hw, struct file *file,

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			     poll_table *wait);

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	int (*ioctl)(struct snd_hwdep *hw, struct file *file,

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		     unsigned int cmd, unsigned long arg);

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	int (*ioctl_compat)(struct snd_hwdep *hw, struct file *file,

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			    unsigned int cmd, unsigned long arg);

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	int (*mmap)(struct snd_hwdep *hw, struct file *file,

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		    struct vm_area_struct *vma);

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	int (*dsp_status)(struct snd_hwdep *hw,

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			  struct snd_hwdep_dsp_status *status);

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	int (*dsp_load)(struct snd_hwdep *hw,

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			struct snd_hwdep_dsp_image *image);

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};

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struct snd_hwdep {

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	struct snd_card *card;

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	struct list_head list;

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	int device;

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	char id[32];

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	char name[80];

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	int iface;

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#ifdef CONFIG_SND_OSSEMUL

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	char oss_dev[32];

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	int oss_type;

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	int ossreg;

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#endif

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	struct snd_hwdep_ops ops;

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	wait_queue_head_t open_wait;

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	void *private_data;

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	void (*private_free) (struct snd_hwdep *hwdep);

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	struct mutex open_mutex;

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	int used;			/* reference counter */

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	unsigned int dsp_loaded;	/* bit fields of loaded dsp indices */

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	unsigned int exclusive:1;	/* exclusive access mode */

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};

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extern int snd_hwdep_new(struct snd_card *card, char *id, int device,

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			 struct snd_hwdep **rhwdep);

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#endif /* __SOUND_HWDEP_H */

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