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/* SPDX-License-Identifier: GPL-2.0-or-later */
#ifndef __SOUND_HWDEP_H
#define __SOUND_HWDEP_H
/*
* Hardware dependent layer
* Copyright (c) by Jaroslav Kysela <[email protected]>
*/
#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);
__poll_t (*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;
#ifdef CONFIG_SND_OSSEMUL
int oss_type;
int ossreg;
#endif
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 */
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