linux/sound/firewire/fireworks/fireworks_hwdep.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * fireworks_hwdep.c - a part of driver for Fireworks based devices
 *
 * Copyright (c) 2013-2014 Takashi Sakamoto
 */

/*
 * This codes have five functionalities.
 *
 * 1.get information about firewire node
 * 2.get notification about starting/stopping stream
 * 3.lock/unlock streaming
 * 4.transmit command of EFW transaction
 * 5.receive response of EFW transaction
 *
 */

#include "fireworks.h"

static long
hwdep_read_resp_buf(struct snd_efw *efw, char __user *buf, long remained,
		    loff_t *offset)
{ … }

static long
hwdep_read_locked(struct snd_efw *efw, char __user *buf, long count,
		  loff_t *offset)
{ … }

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

static long
hwdep_write(struct snd_hwdep *hwdep, const char __user *data, 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_efw *efw, void __user *arg)
{ … }

static int
hwdep_lock(struct snd_efw *efw)
{ … }

static int
hwdep_unlock(struct snd_efw *efw)
{ … }

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_efw_create_hwdep_device(struct snd_efw *efw)
{ … }