usbaudio.h 2.87 KB
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#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
 */

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/* 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))

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/*
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 *
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 */

struct snd_usb_audio {
	int index;
	struct usb_device *dev;
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	struct snd_card *card;
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	struct usb_interface *pm_intf;
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	u32 usb_id;
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	struct mutex mutex;
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	struct mutex shutdown_mutex;
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	unsigned int shutdown:1;
	unsigned int probing:1;
	unsigned int autosuspended:1;	
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	unsigned int txfr_quirk:1; /* Subframe boundaries on transfers */
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	int num_interfaces;
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	int num_suspended_intf;
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	struct list_head pcm_list;	/* list of pcm streams */
	int pcm_devs;

	struct list_head midi_list;	/* list of midi interfaces */

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	struct list_head mixer_list;	/* list of mixer interfaces */
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	int setup;			/* from the 'device_setup' module param */
	int nrpacks;			/* from the 'nrpacks' module param */
	int async_unlink;		/* from the 'async_unlink' module param */
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	struct usb_host_interface *ctrl_intf;	/* the audio control interface */
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};

/*
 * Information about devices with broken descriptors
 */

/* special values for .ifnum */
#define QUIRK_NO_INTERFACE		-2
#define QUIRK_ANY_INTERFACE		-1

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enum quirk_type {
	QUIRK_IGNORE_INTERFACE,
	QUIRK_COMPOSITE,
	QUIRK_MIDI_STANDARD_INTERFACE,
	QUIRK_MIDI_FIXED_ENDPOINT,
	QUIRK_MIDI_YAMAHA,
	QUIRK_MIDI_MIDIMAN,
	QUIRK_MIDI_NOVATION,
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	QUIRK_MIDI_RAW_BYTES,
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	QUIRK_MIDI_EMAGIC,
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	QUIRK_MIDI_CME,
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	QUIRK_MIDI_AKAI,
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	QUIRK_MIDI_US122L,
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	QUIRK_MIDI_FTDI,
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	QUIRK_AUDIO_STANDARD_INTERFACE,
	QUIRK_AUDIO_FIXED_ENDPOINT,
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	QUIRK_AUDIO_EDIROL_UAXX,
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	QUIRK_AUDIO_ALIGN_TRANSFER,
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	QUIRK_AUDIO_STANDARD_MIXER,
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	QUIRK_TYPE_COUNT
};
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struct snd_usb_audio_quirk {
	const char *vendor_name;
	const char *product_name;
	int16_t ifnum;
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	uint16_t type;
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	const void *data;
};

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#define combine_word(s)    ((*(s)) | ((unsigned int)(s)[1] << 8))
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#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 */