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
10 struct 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
34 struct 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);
42 void usb_stream_free(struct usb_stream_kernel *sk);
43 int usb_stream_start(struct usb_stream_kernel *sk);
44 void usb_stream_stop(struct usb_stream_kernel *sk);
45
46 #endif /* __USB_STREAM_H */
47
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