linux/sound/firewire/fireface/ff-hwdep.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * ff-hwdep.c - a part of driver for RME Fireface series
 *
 * Copyright (c) 2015-2017 Takashi Sakamoto
 */

/*
 * This codes give three functionality.
 *
 * 1.get firewire node information
 * 2.get notification about starting/stopping stream
 * 3.lock/unlock stream
 */

#include "ff.h"

static bool has_msg(struct snd_ff *ff)
{ … }

static long hwdep_read(struct snd_hwdep *hwdep, char __user *buf,  long count,
		       loff_t *offset)
{ … }

static __poll_t hwdep_poll(struct snd_hwdep *hwdep, struct file *file,
			       poll_table *wait)
{ … }

static int hwdep_get_info(struct snd_ff *ff, void __user *arg)
{ … }

static int hwdep_lock(struct snd_ff *ff)
{ … }

static int hwdep_unlock(struct snd_ff *ff)
{ … }

static int hwdep_release(struct snd_hwdep *hwdep, struct file *file)
{ … }

static int hwdep_ioctl(struct snd_hwdep *hwdep, struct file *file,
		       unsigned int cmd, unsigned long arg)
{ … }

#ifdef CONFIG_COMPAT
static int hwdep_compat_ioctl(struct snd_hwdep *hwdep, struct file *file,
			      unsigned int cmd, unsigned long arg)
{ … }
#else
#define hwdep_compat_ioctl …
#endif

int snd_ff_create_hwdep_devices(struct snd_ff *ff)
{ … }