linux/sound/firewire/tascam/tascam-hwdep.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * tascam-hwdep.c - a part of driver for TASCAM FireWire series
 *
 * Copyright (c) 2015 Takashi Sakamoto
 */

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

#include "tascam.h"

static long tscm_hwdep_read_locked(struct snd_tscm *tscm, char __user *buf,
				   long count, loff_t *offset)
	__releases(&tscm->lock)
{ … }

static long tscm_hwdep_read_queue(struct snd_tscm *tscm, char __user *buf,
				  long remained, loff_t *offset)
	__releases(&tscm->lock)
{ … }

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_tscm *tscm, void __user *arg)
{ … }

static int hwdep_lock(struct snd_tscm *tscm)
{ … }

static int hwdep_unlock(struct snd_tscm *tscm)
{ … }

static int tscm_hwdep_state(struct snd_tscm *tscm, void __user *arg)
{ … }

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_tscm_create_hwdep_device(struct snd_tscm *tscm)
{ … }