sound/usb/usx2y/usb_stream.h

Source file repositories/reference/linux-study-clean/sound/usb/usx2y/usb_stream.h

File Facts

System
Linux kernel
Corpus path
sound/usb/usx2y/usb_stream.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 usb_stream_kernel {
	struct usb_stream *s;
	struct usb_device *dev;

	void *write_page;

	unsigned int n_o_ps;

	struct urb *inurb[USB_STREAM_NURBS];
	struct urb *idle_inurb;
	struct urb *completed_inurb;
	struct urb *outurb[USB_STREAM_NURBS];
	struct urb *idle_outurb;
	struct urb *completed_outurb;
	struct urb *i_urb;

	int iso_frame_balance;

	wait_queue_head_t sleep;

	unsigned int out_phase;
	unsigned int out_phase_peeked;
	unsigned int freqn;
};

struct usb_stream *usb_stream_new(struct usb_stream_kernel *sk,
				  struct usb_device *dev,
				  unsigned int in_endpoint,
				  unsigned int out_endpoint,
				  unsigned int sample_rate,
				  unsigned int use_packsize,
				  unsigned int period_frames,
				  unsigned int frame_size);
void usb_stream_free(struct usb_stream_kernel *sk);
int usb_stream_start(struct usb_stream_kernel *sk);
void usb_stream_stop(struct usb_stream_kernel *sk);

#endif /* __USB_STREAM_H */

Annotation

Implementation Notes