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 */

 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	struct usb_device *dev;
13
14	void *write_page;
15
16	unsigned int n_o_ps;
17
18	struct urb *inurb[USB_STREAM_NURBS];
19	struct urb *idle_inurb;
20	struct urb *completed_inurb;
21	struct urb *outurb[USB_STREAM_NURBS];
22	struct urb *idle_outurb;
23	struct urb *completed_outurb;
24	struct urb *i_urb;
25
26	int iso_frame_balance;
27
28	wait_queue_head_t sleep;
29
30	unsigned int out_phase;
31	unsigned int out_phase_peeked;
32	unsigned int freqn;
33};
34
35struct usb_stream *usb_stream_new(struct usb_stream_kernel *sk,
36				  struct usb_device *dev,
37				  unsigned int in_endpoint,
38				  unsigned int out_endpoint,
39				  unsigned int sample_rate,
40				  unsigned int use_packsize,
41				  unsigned int period_frames,
42				  unsigned int frame_size);
43void usb_stream_free(struct usb_stream_kernel *sk);
44int usb_stream_start(struct usb_stream_kernel *sk);
45void usb_stream_stop(struct usb_stream_kernel *sk);
46
47#endif /* __USB_STREAM_H */