include/uapi/sound/firewire.h

Source file repositories/reference/linux-study-clean/include/uapi/sound/firewire.h

File Facts

System
Linux kernel
Corpus path
include/uapi/sound/firewire.h
Extension
.h
Size
11120 bytes
Lines
288
Domain
Repository Root And Misc
Bucket
include
Inferred role
Repository Root And Misc: implementation source
Status
source implementation candidate

Why This File Exists

Top-level or miscellaneous repository surface. Use this as map coverage unless a later manual pass promotes the file into a deeper subsystem dossier.

Dependency Surface

Detected Declarations

Annotated Snippet

struct snd_firewire_event_common {
	unsigned int type; /* SNDRV_FIREWIRE_EVENT_xxx */
};

struct snd_firewire_event_lock_status {
	unsigned int type;
	unsigned int status; /* 0/1 = unlocked/locked */
};

struct snd_firewire_event_dice_notification {
	unsigned int type;
	unsigned int notification; /* DICE-specific bits */
};

#define SND_EFW_TRANSACTION_USER_SEQNUM_MAX	((__u32)((__u16)~0) - 1)
/* each field should be in big endian */
struct snd_efw_transaction {
	__be32 length;
	__be32 version;
	__be32 seqnum;
	__be32 category;
	__be32 command;
	__be32 status;
	__be32 params[];
};
struct snd_firewire_event_efw_response {
	unsigned int type;
	__be32 response[];	/* some responses */
};

struct snd_firewire_event_digi00x_message {
	unsigned int type;
	__u32 message;	/* Digi00x-specific message */
};

struct snd_firewire_event_motu_notification {
	unsigned int type;
	__u32 message;	/* MOTU-specific bits. */
};

struct snd_firewire_tascam_change {
	unsigned int index;
	__be32 before;
	__be32 after;
};

struct snd_firewire_event_tascam_control {
	unsigned int type;
	struct snd_firewire_tascam_change changes[];
};

struct snd_firewire_event_motu_register_dsp_change {
	unsigned int type;
	__u32 count;		/* The number of changes. */
	__u32 changes[];	/* Encoded event for change of register DSP. */
};

/**
 * struct snd_firewire_event_ff400_message - the container for message from Fireface 400 when
 *					     operating hardware knob.
 *
 * @type: Fixed to SNDRV_FIREWIRE_EVENT_FF400_MESSAGE.
 * @message_count: The number of messages.
 * @messages.message: The messages expressing hardware knob operation.
 * @messages.tstamp: The isochronous cycle at which the request subaction of asynchronous
 *		     transaction was sent to deliver the message. It has 16 bit unsigned integer
 *		     value. The higher 3 bits of value expresses the lower three bits of second
 *		     field in the format of CYCLE_TIME, up to 7. The rest 13 bits expresses cycle
 *		     field up to 7999.
 *
 * The structure expresses message transmitted by Fireface 400 when operating hardware knob.
 */
struct snd_firewire_event_ff400_message {
	unsigned int type;
	unsigned int message_count;
	struct {
		__u32 message;
		__u32 tstamp;
	} messages[];
};

union snd_firewire_event {
	struct snd_firewire_event_common            common;
	struct snd_firewire_event_lock_status       lock_status;
	struct snd_firewire_event_dice_notification dice_notification;
	struct snd_firewire_event_efw_response      efw_response;
	struct snd_firewire_event_digi00x_message   digi00x_message;
	struct snd_firewire_event_tascam_control    tascam_control;
	struct snd_firewire_event_motu_notification motu_notification;
	struct snd_firewire_event_motu_register_dsp_change motu_register_dsp_change;

Annotation

Implementation Notes