1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __USB_STREAM_H
3#define __USB_STREAM_H
4
5#include <uapi/sound/usb_stream.h>
6
7#define USB_STREAM_NURBS 4
8#define USB_STREAM_URBDEPTH 4
9
10struct usb_stream_kernel {
11	struct usb_stream *s;
12
13	void *write_page;
14
15	unsigned int n_o_ps;
16
17	struct urb *inurb[USB_STREAM_NURBS];
18	struct urb *idle_inurb;
19	struct urb *completed_inurb;
20	struct urb *outurb[USB_STREAM_NURBS];
21	struct urb *idle_outurb;
22	struct urb *completed_outurb;
23	struct urb *i_urb;
24
25	int iso_frame_balance;
26
27	wait_queue_head_t sleep;
28
29	unsigned int out_phase;
30	unsigned int out_phase_peeked;
31	unsigned int freqn;
32};
33
34struct usb_stream *usb_stream_new(struct usb_stream_kernel *sk,
35				  struct usb_device *dev,
36				  unsigned int in_endpoint,
37				  unsigned int out_endpoint,
38				  unsigned int sample_rate,
39				  unsigned int use_packsize,
40				  unsigned int period_frames,
41				  unsigned int frame_size);
42void usb_stream_free(struct usb_stream_kernel *sk);
43int usb_stream_start(struct usb_stream_kernel *sk);
44void usb_stream_stop(struct usb_stream_kernel *sk);
45
46#endif /* __USB_STREAM_H */
47