sound/usb/usbaudio.h - linux - Git at Google

 /* SPDX-License-Identifier: GPL-2.0-or-later */
 #ifndef __USBAUDIO_H
 #define __USBAUDIO_H
 /*
  *   (Tentative) USB Audio Driver for ALSA
  *
  *   Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
  */

 /* handling of USB vendor/product ID pairs as 32-bit numbers */
 #define USB_ID(vendor, product) (((unsigned int)(vendor) << 16) | (product))
 #define USB_ID_VENDOR(id) ((id) >> 16)
 #define USB_ID_PRODUCT(id) ((u16)(id))

 /*
  *
  */

 struct media_device;
 struct media_intf_devnode;

 #define MAX_CARD_INTERFACES	16

 /*
  * Structure holding assosiation between Audio Control Interface
  * and given Streaming or Midi Interface.
  */
 struct snd_intf_to_ctrl {
 	u8 interface;
 	struct usb_host_interface *ctrl_intf;
 };

 struct snd_usb_audio {
 	int index;
 	struct usb_device *dev;
 	struct snd_card *card;
 	struct usb_interface *intf[MAX_CARD_INTERFACES];
 	u32 usb_id;
 	uint16_t quirk_type;
 	struct mutex mutex;
 	unsigned int system_suspend;
 	atomic_t active;
 	atomic_t shutdown;
 	atomic_t usage_count;
 	wait_queue_head_t shutdown_wait;
 	unsigned int quirk_flags;
 	unsigned int need_delayed_register:1; /* warn for delayed registration */
 	int num_interfaces;
 	int last_iface;
 	int num_suspended_intf;
 	int sample_rate_read_error;

 	int badd_profile;		/* UAC3 BADD profile */

 	struct list_head pcm_list;	/* list of pcm streams */
 	struct list_head ep_list;	/* list of audio-related endpoints */
 	struct list_head iface_ref_list; /* list of interface refcounts */
 	struct list_head clock_ref_list; /* list of clock refcounts */
 	int pcm_devs;

 	unsigned int num_rawmidis;	/* number of created rawmidi devices */
 	struct list_head midi_list;	/* list of midi interfaces */
 	struct list_head midi_v2_list;	/* list of MIDI 2 interfaces */

 	struct list_head mixer_list;	/* list of mixer interfaces */

 	int setup;			/* from the 'device_setup' module param */
 	bool generic_implicit_fb;	/* from the 'implicit_fb' module param */
 	bool autoclock;			/* from the 'autoclock' module param */

 	bool lowlatency;		/* from the 'lowlatency' module param */
 	struct usb_host_interface *ctrl_intf;	/* the audio control interface */
 	struct media_device *media_dev;
 	struct media_intf_devnode *ctl_intf_media_devnode;

 	unsigned int num_intf_to_ctrl;
 	struct snd_intf_to_ctrl intf_to_ctrl[MAX_CARD_INTERFACES];
 };

 #define USB_AUDIO_IFACE_UNUSED	((void *)-1L)

 #define usb_audio_err(chip, fmt, args...) \
 	dev_err(&(chip)->dev->dev, fmt, ##args)
 #define usb_audio_err_ratelimited(chip, fmt, args...) \
 	dev_err_ratelimited(&(chip)->dev->dev, fmt, ##args)
 #define usb_audio_warn(chip, fmt, args...) \
 	dev_warn(&(chip)->dev->dev, fmt, ##args)
 #define usb_audio_info(chip, fmt, args...) \
 	dev_info(&(chip)->dev->dev, fmt, ##args)
 #define usb_audio_dbg(chip, fmt, args...) \
 	dev_dbg(&(chip)->dev->dev, fmt, ##args)

 /*
  * Information about devices with broken descriptors
  */

 /* special values for .ifnum */
 #define QUIRK_NODEV_INTERFACE		-3	/* return -ENODEV */
 #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_MIDI_CH345,
 	QUIRK_AUDIO_STANDARD_INTERFACE,
 	QUIRK_AUDIO_FIXED_ENDPOINT,
 	QUIRK_AUDIO_EDIROL_UAXX,
 	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))

 int snd_usb_lock_shutdown(struct snd_usb_audio *chip);
 void snd_usb_unlock_shutdown(struct snd_usb_audio *chip);

 extern bool snd_usb_use_vmalloc;
 extern bool snd_usb_skip_validation;

 /*
  * Driver behavior quirk flags, stored in chip->quirk_flags
  *
  * QUIRK_FLAG_GET_SAMPLE_RATE:
  *  Skip reading sample rate for devices, as some devices behave inconsistently
  *  or return error
  * QUIRK_FLAG_SHARE_MEDIA_DEVICE:
  *  Create Media Controller API entries
  * QUIRK_FLAG_ALIGN_TRANSFER:
  *  Allow alignment on audio sub-slot (channel samples) rather than on audio
  *  slots (audio frames)
  * QUIRK_TX_LENGTH:
  *  Add length specifier to transfers
  * QUIRK_FLAG_PLAYBACK_FIRST:
  *  Start playback stream at first even in implement feedback mode
  * QUIRK_FLAG_SKIP_CLOCK_SELECTOR:
  *  Skip clock selector setup; the device may reset to invalid state
  * QUIRK_FLAG_IGNORE_CLOCK_SOURCE:
  *  Ignore errors from clock source search; i.e. hardcoded clock
  * QUIRK_FLAG_ITF_USB_DSD_DAC:
  *  Indicates the device is for ITF-USB DSD based DACs that need a vendor cmd
  *  to switch between PCM and native DSD mode
  * QUIRK_FLAG_CTL_MSG_DELAY:
  *  Add a delay of 20ms at each control message handling
  * QUIRK_FLAG_CTL_MSG_DELAY_1M:
  *  Add a delay of 1-2ms at each control message handling
  * QUIRK_FLAG_CTL_MSG_DELAY_5M:
  *  Add a delay of 5-6ms at each control message handling
  * QUIRK_FLAG_IFACE_DELAY:
  *  Add a delay of 50ms at each interface setup
  * QUIRK_FLAG_VALIDATE_RATES:
  *  Perform sample rate validations at probe
  * QUIRK_FLAG_DISABLE_AUTOSUSPEND:
  *  Disable runtime PM autosuspend
  * QUIRK_FLAG_IGNORE_CTL_ERROR:
  *  Ignore errors for mixer access
  * QUIRK_FLAG_DSD_RAW:
  *  Support generic DSD raw U32_BE format
  * QUIRK_FLAG_SET_IFACE_FIRST:
  *  Set up the interface at first like UAC1
  * QUIRK_FLAG_GENERIC_IMPLICIT_FB
  *  Apply the generic implicit feedback sync mode (same as implicit_fb=1 option)
  * QUIRK_FLAG_SKIP_IMPLICIT_FB
  *  Don't apply implicit feedback sync mode
  * QUIRK_FLAG_IFACE_SKIP_CLOSE
  *  Don't closed interface during setting sample rate
  * QUIRK_FLAG_FORCE_IFACE_RESET
  *  Force an interface reset whenever stopping & restarting a stream
  *  (e.g. after xrun)
  * QUIRK_FLAG_FIXED_RATE
  *  Do not set PCM rate (frequency) when only one rate is available
  *  for the given endpoint.
  */

 #define QUIRK_FLAG_GET_SAMPLE_RATE	(1U << 0)
 #define QUIRK_FLAG_SHARE_MEDIA_DEVICE	(1U << 1)
 #define QUIRK_FLAG_ALIGN_TRANSFER	(1U << 2)
 #define QUIRK_FLAG_TX_LENGTH		(1U << 3)
 #define QUIRK_FLAG_PLAYBACK_FIRST	(1U << 4)
 #define QUIRK_FLAG_SKIP_CLOCK_SELECTOR	(1U << 5)
 #define QUIRK_FLAG_IGNORE_CLOCK_SOURCE	(1U << 6)
 #define QUIRK_FLAG_ITF_USB_DSD_DAC	(1U << 7)
 #define QUIRK_FLAG_CTL_MSG_DELAY	(1U << 8)
 #define QUIRK_FLAG_CTL_MSG_DELAY_1M	(1U << 9)
 #define QUIRK_FLAG_CTL_MSG_DELAY_5M	(1U << 10)
 #define QUIRK_FLAG_IFACE_DELAY		(1U << 11)
 #define QUIRK_FLAG_VALIDATE_RATES	(1U << 12)
 #define QUIRK_FLAG_DISABLE_AUTOSUSPEND	(1U << 13)
 #define QUIRK_FLAG_IGNORE_CTL_ERROR	(1U << 14)
 #define QUIRK_FLAG_DSD_RAW		(1U << 15)
 #define QUIRK_FLAG_SET_IFACE_FIRST	(1U << 16)
 #define QUIRK_FLAG_GENERIC_IMPLICIT_FB	(1U << 17)
 #define QUIRK_FLAG_SKIP_IMPLICIT_FB	(1U << 18)
 #define QUIRK_FLAG_IFACE_SKIP_CLOSE	(1U << 19)
 #define QUIRK_FLAG_FORCE_IFACE_RESET	(1U << 20)
 #define QUIRK_FLAG_FIXED_RATE		(1U << 21)

 #endif /* __USBAUDIO_H */
	/* SPDX-License-Identifier: GPL-2.0-or-later */
	#ifndef __USBAUDIO_H
	#define __USBAUDIO_H
	/*
	* (Tentative) USB Audio Driver for ALSA
	*
	* Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
	*/

	/* handling of USB vendor/product ID pairs as 32-bit numbers */
	#define USB_ID(vendor, product) (((unsigned int)(vendor) << 16) \| (product))
	#define USB_ID_VENDOR(id) ((id) >> 16)
	#define USB_ID_PRODUCT(id) ((u16)(id))

	/*
	*
	*/

	struct media_device;
	struct media_intf_devnode;

	#define MAX_CARD_INTERFACES 16

	/*
	* Structure holding assosiation between Audio Control Interface
	* and given Streaming or Midi Interface.
	*/
	struct snd_intf_to_ctrl {
	u8 interface;
	struct usb_host_interface *ctrl_intf;
	};

	struct snd_usb_audio {
	int index;
	struct usb_device *dev;
	struct snd_card *card;
	struct usb_interface *intf[MAX_CARD_INTERFACES];
	u32 usb_id;
	uint16_t quirk_type;
	struct mutex mutex;
	unsigned int system_suspend;
	atomic_t active;
	atomic_t shutdown;
	atomic_t usage_count;
	wait_queue_head_t shutdown_wait;
	unsigned int quirk_flags;
	unsigned int need_delayed_register:1; /* warn for delayed registration */
	int num_interfaces;
	int last_iface;
	int num_suspended_intf;
	int sample_rate_read_error;

	int badd_profile; /* UAC3 BADD profile */

	struct list_head pcm_list; /* list of pcm streams */
	struct list_head ep_list; /* list of audio-related endpoints */
	struct list_head iface_ref_list; /* list of interface refcounts */
	struct list_head clock_ref_list; /* list of clock refcounts */
	int pcm_devs;

	unsigned int num_rawmidis; /* number of created rawmidi devices */
	struct list_head midi_list; /* list of midi interfaces */
	struct list_head midi_v2_list; /* list of MIDI 2 interfaces */

	struct list_head mixer_list; /* list of mixer interfaces */

	int setup; /* from the 'device_setup' module param */
	bool generic_implicit_fb; /* from the 'implicit_fb' module param */
	bool autoclock; /* from the 'autoclock' module param */

	bool lowlatency; /* from the 'lowlatency' module param */
	struct usb_host_interface ctrl_intf; / the audio control interface */
	struct media_device *media_dev;
	struct media_intf_devnode *ctl_intf_media_devnode;

	unsigned int num_intf_to_ctrl;
	struct snd_intf_to_ctrl intf_to_ctrl[MAX_CARD_INTERFACES];
	};

	#define USB_AUDIO_IFACE_UNUSED ((void *)-1L)

	#define usb_audio_err(chip, fmt, args...) \
	dev_err(&(chip)->dev->dev, fmt, ##args)
	#define usb_audio_err_ratelimited(chip, fmt, args...) \
	dev_err_ratelimited(&(chip)->dev->dev, fmt, ##args)
	#define usb_audio_warn(chip, fmt, args...) \
	dev_warn(&(chip)->dev->dev, fmt, ##args)
	#define usb_audio_info(chip, fmt, args...) \
	dev_info(&(chip)->dev->dev, fmt, ##args)
	#define usb_audio_dbg(chip, fmt, args...) \
	dev_dbg(&(chip)->dev->dev, fmt, ##args)

	/*
	* Information about devices with broken descriptors
	*/

	/* special values for .ifnum */
	#define QUIRK_NODEV_INTERFACE -3 /* return -ENODEV */
	#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_MIDI_CH345,
	QUIRK_AUDIO_STANDARD_INTERFACE,
	QUIRK_AUDIO_FIXED_ENDPOINT,
	QUIRK_AUDIO_EDIROL_UAXX,
	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))

	int snd_usb_lock_shutdown(struct snd_usb_audio *chip);
	void snd_usb_unlock_shutdown(struct snd_usb_audio *chip);

	extern bool snd_usb_use_vmalloc;
	extern bool snd_usb_skip_validation;

	/*
	* Driver behavior quirk flags, stored in chip->quirk_flags
	*
	* QUIRK_FLAG_GET_SAMPLE_RATE:
	* Skip reading sample rate for devices, as some devices behave inconsistently
	* or return error
	* QUIRK_FLAG_SHARE_MEDIA_DEVICE:
	* Create Media Controller API entries
	* QUIRK_FLAG_ALIGN_TRANSFER:
	* Allow alignment on audio sub-slot (channel samples) rather than on audio
	* slots (audio frames)
	* QUIRK_TX_LENGTH:
	* Add length specifier to transfers
	* QUIRK_FLAG_PLAYBACK_FIRST:
	* Start playback stream at first even in implement feedback mode
	* QUIRK_FLAG_SKIP_CLOCK_SELECTOR:
	* Skip clock selector setup; the device may reset to invalid state
	* QUIRK_FLAG_IGNORE_CLOCK_SOURCE:
	* Ignore errors from clock source search; i.e. hardcoded clock
	* QUIRK_FLAG_ITF_USB_DSD_DAC:
	* Indicates the device is for ITF-USB DSD based DACs that need a vendor cmd
	* to switch between PCM and native DSD mode
	* QUIRK_FLAG_CTL_MSG_DELAY:
	* Add a delay of 20ms at each control message handling
	* QUIRK_FLAG_CTL_MSG_DELAY_1M:
	* Add a delay of 1-2ms at each control message handling
	* QUIRK_FLAG_CTL_MSG_DELAY_5M:
	* Add a delay of 5-6ms at each control message handling
	* QUIRK_FLAG_IFACE_DELAY:
	* Add a delay of 50ms at each interface setup
	* QUIRK_FLAG_VALIDATE_RATES:
	* Perform sample rate validations at probe
	* QUIRK_FLAG_DISABLE_AUTOSUSPEND:
	* Disable runtime PM autosuspend
	* QUIRK_FLAG_IGNORE_CTL_ERROR:
	* Ignore errors for mixer access
	* QUIRK_FLAG_DSD_RAW:
	* Support generic DSD raw U32_BE format
	* QUIRK_FLAG_SET_IFACE_FIRST:
	* Set up the interface at first like UAC1
	* QUIRK_FLAG_GENERIC_IMPLICIT_FB
	* Apply the generic implicit feedback sync mode (same as implicit_fb=1 option)
	* QUIRK_FLAG_SKIP_IMPLICIT_FB
	* Don't apply implicit feedback sync mode
	* QUIRK_FLAG_IFACE_SKIP_CLOSE
	* Don't closed interface during setting sample rate
	* QUIRK_FLAG_FORCE_IFACE_RESET
	* Force an interface reset whenever stopping & restarting a stream
	* (e.g. after xrun)
	* QUIRK_FLAG_FIXED_RATE
	* Do not set PCM rate (frequency) when only one rate is available
	* for the given endpoint.
	*/

	#define QUIRK_FLAG_GET_SAMPLE_RATE (1U << 0)
	#define QUIRK_FLAG_SHARE_MEDIA_DEVICE (1U << 1)
	#define QUIRK_FLAG_ALIGN_TRANSFER (1U << 2)
	#define QUIRK_FLAG_TX_LENGTH (1U << 3)
	#define QUIRK_FLAG_PLAYBACK_FIRST (1U << 4)
	#define QUIRK_FLAG_SKIP_CLOCK_SELECTOR (1U << 5)
	#define QUIRK_FLAG_IGNORE_CLOCK_SOURCE (1U << 6)
	#define QUIRK_FLAG_ITF_USB_DSD_DAC (1U << 7)
	#define QUIRK_FLAG_CTL_MSG_DELAY (1U << 8)
	#define QUIRK_FLAG_CTL_MSG_DELAY_1M (1U << 9)
	#define QUIRK_FLAG_CTL_MSG_DELAY_5M (1U << 10)
	#define QUIRK_FLAG_IFACE_DELAY (1U << 11)
	#define QUIRK_FLAG_VALIDATE_RATES (1U << 12)
	#define QUIRK_FLAG_DISABLE_AUTOSUSPEND (1U << 13)
	#define QUIRK_FLAG_IGNORE_CTL_ERROR (1U << 14)
	#define QUIRK_FLAG_DSD_RAW (1U << 15)
	#define QUIRK_FLAG_SET_IFACE_FIRST (1U << 16)
	#define QUIRK_FLAG_GENERIC_IMPLICIT_FB (1U << 17)
	#define QUIRK_FLAG_SKIP_IMPLICIT_FB (1U << 18)
	#define QUIRK_FLAG_IFACE_SKIP_CLOSE (1U << 19)
	#define QUIRK_FLAG_FORCE_IFACE_RESET (1U << 20)
	#define QUIRK_FLAG_FIXED_RATE (1U << 21)

	#endif /* __USBAUDIO_H */