#ifndef __USBAUDIO_H
  #define __USBAUDIO_H
  /*
   *   (Tentative) USB Audio Driver for ALSA
   *
   *   Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
   *
   *
   *   This program is free software; you can redistribute it and/or modify
   *   it under the terms of the GNU General Public License as published by
   *   the Free Software Foundation; either version 2 of the License, or
   *   (at your option) any later version.
   *
   *   This program is distributed in the hope that it will be useful,
   *   but WITHOUT ANY WARRANTY; without even the implied warranty of
   *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   *   GNU General Public License for more details.
   *
   *   You should have received a copy of the GNU General Public License
   *   along with this program; if not, write to the Free Software
   *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
   */
  
  /* handling of USB vendor/product ID pairs as 32-bit numbers */
  #define USB_ID(vendor, product) (((vendor) << 16) | (product))
  #define USB_ID_VENDOR(id) ((id) >> 16)
  #define USB_ID_PRODUCT(id) ((u16)(id))
  
  /*
   *
   */
  
  struct snd_usb_audio {
  	int index;
  	struct usb_device *dev;
  	struct snd_card *card;
  	struct usb_interface *pm_intf;
  	u32 usb_id;
  	struct mutex mutex;
  	struct rw_semaphore shutdown_rwsem;
  	unsigned int shutdown:1;
  	unsigned int probing:1;
  	unsigned int autosuspended:1;	
  	unsigned int txfr_quirk:1; /* Subframe boundaries on transfers */
  	
  	int num_interfaces;
  	int num_suspended_intf;
  
  	struct list_head pcm_list;	/* list of pcm streams */
  	struct list_head ep_list;	/* list of audio-related endpoints */
  	int pcm_devs;
  
  	struct list_head midi_list;	/* list of midi interfaces */
  
  	struct list_head mixer_list;	/* list of mixer interfaces */
  
  	int setup;			/* from the 'device_setup' module param */
  	bool autoclock;			/* from the 'autoclock' module param */
  
  	struct usb_host_interface *ctrl_intf;	/* the audio control interface */
  };
  
  /*
   * Information about devices with broken descriptors
   */
  
  /* special values for .ifnum */
  #define QUIRK_NO_INTERFACE		-2
  #define QUIRK_ANY_INTERFACE		-1
  
  enum quirk_type {
  	QUIRK_IGNORE_INTERFACE,
  	QUIRK_COMPOSITE,
  	QUIRK_AUTODETECT,
  	QUIRK_MIDI_STANDARD_INTERFACE,
  	QUIRK_MIDI_FIXED_ENDPOINT,
  	QUIRK_MIDI_YAMAHA,
  	QUIRK_MIDI_ROLAND,
  	QUIRK_MIDI_MIDIMAN,
  	QUIRK_MIDI_NOVATION,
  	QUIRK_MIDI_RAW_BYTES,
  	QUIRK_MIDI_EMAGIC,
  	QUIRK_MIDI_CME,
  	QUIRK_MIDI_AKAI,
  	QUIRK_MIDI_US122L,
  	QUIRK_MIDI_FTDI,
  	QUIRK_AUDIO_STANDARD_INTERFACE,
  	QUIRK_AUDIO_FIXED_ENDPOINT,
  	QUIRK_AUDIO_EDIROL_UAXX,
  	QUIRK_AUDIO_ALIGN_TRANSFER,
  	QUIRK_AUDIO_STANDARD_MIXER,
  
  	QUIRK_TYPE_COUNT
  };
  
  struct snd_usb_audio_quirk {
  	const char *vendor_name;
  	const char *product_name;
  	int16_t ifnum;
  	uint16_t type;
  	const void *data;
  };
  
  #define combine_word(s)    ((*(s)) | ((unsigned int)(s)[1] << 8))
  #define combine_triple(s)  (combine_word(s) | ((unsigned int)(s)[2] << 16))
  #define combine_quad(s)    (combine_triple(s) | ((unsigned int)(s)[3] << 24))
  
  #endif /* __USBAUDIO_H */