sound/usb/line6/midi.h

Source file repositories/reference/linux-study-clean/sound/usb/line6/midi.h

File Facts

System
Linux kernel
Corpus path
sound/usb/line6/midi.h
Extension
.h
Size
1118 bytes
Lines
48
Domain
Driver Families
Bucket
sound/usb
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

struct snd_line6_midi {
	/* Pointer back to the Line 6 driver data structure */
	struct usb_line6 *line6;

	/* MIDI substream for receiving (or NULL if not active) */
	struct snd_rawmidi_substream *substream_receive;

	/* MIDI substream for transmitting (or NULL if not active) */
	struct snd_rawmidi_substream *substream_transmit;

	/* Number of currently active MIDI send URBs */
	int num_active_send_urbs;

	/* Spin lock to protect MIDI buffer handling */
	spinlock_t lock;

	/* Wait queue for MIDI transmission */
	wait_queue_head_t send_wait;

	/* Buffer for incoming MIDI stream */
	struct midi_buffer midibuf_in;

	/* Buffer for outgoing MIDI stream */
	struct midi_buffer midibuf_out;
};

extern int line6_init_midi(struct usb_line6 *line6);
extern void line6_midi_receive(struct usb_line6 *line6, unsigned char *data,
			       int length);

#endif

Annotation

Implementation Notes