1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
2 | /* |
3 | * |
4 | * Copyright (C) 2005 Mike Isely <isely@pobox.com> |
5 | */ |
6 | #ifndef __PVRUSB2_IO_H |
7 | #define __PVRUSB2_IO_H |
8 | |
9 | #include <linux/usb.h> |
10 | #include <linux/list.h> |
11 | |
12 | typedef void (*pvr2_stream_callback)(void *); |
13 | |
14 | enum pvr2_buffer_state { |
15 | pvr2_buffer_state_none = 0, // Not on any list |
16 | pvr2_buffer_state_idle = 1, // Buffer is ready to be used again |
17 | pvr2_buffer_state_queued = 2, // Buffer has been queued for filling |
18 | pvr2_buffer_state_ready = 3, // Buffer has data available |
19 | }; |
20 | |
21 | struct pvr2_stream; |
22 | struct pvr2_buffer; |
23 | |
24 | struct pvr2_stream_stats { |
25 | unsigned int buffers_in_queue; |
26 | unsigned int buffers_in_idle; |
27 | unsigned int buffers_in_ready; |
28 | unsigned int buffers_processed; |
29 | unsigned int buffers_failed; |
30 | unsigned int bytes_processed; |
31 | }; |
32 | |
33 | /* Initialize / tear down stream structure */ |
34 | struct pvr2_stream *pvr2_stream_create(void); |
35 | void pvr2_stream_destroy(struct pvr2_stream *); |
36 | void pvr2_stream_setup(struct pvr2_stream *, |
37 | struct usb_device *dev,int endpoint, |
38 | unsigned int tolerance); |
39 | void pvr2_stream_set_callback(struct pvr2_stream *, |
40 | pvr2_stream_callback func, |
41 | void *data); |
42 | void pvr2_stream_get_stats(struct pvr2_stream *, |
43 | struct pvr2_stream_stats *, |
44 | int zero_counts); |
45 | |
46 | /* Query / set the nominal buffer count */ |
47 | int pvr2_stream_get_buffer_count(struct pvr2_stream *); |
48 | int pvr2_stream_set_buffer_count(struct pvr2_stream *,unsigned int); |
49 | |
50 | /* Get a pointer to a buffer that is either idle, ready, or is specified |
51 | named. */ |
52 | struct pvr2_buffer *pvr2_stream_get_idle_buffer(struct pvr2_stream *); |
53 | struct pvr2_buffer *pvr2_stream_get_ready_buffer(struct pvr2_stream *); |
54 | struct pvr2_buffer *pvr2_stream_get_buffer(struct pvr2_stream *sp,int id); |
55 | |
56 | /* Find out how many buffers are idle or ready */ |
57 | int pvr2_stream_get_ready_count(struct pvr2_stream *); |
58 | |
59 | |
60 | /* Kill all pending buffers and throw away any ready buffers as well */ |
61 | void pvr2_stream_kill(struct pvr2_stream *); |
62 | |
63 | /* Set up the actual storage for a buffer */ |
64 | int pvr2_buffer_set_buffer(struct pvr2_buffer *,void *ptr,unsigned int cnt); |
65 | |
66 | /* Find out size of data in the given ready buffer */ |
67 | unsigned int pvr2_buffer_get_count(struct pvr2_buffer *); |
68 | |
69 | /* Retrieve completion code for given ready buffer */ |
70 | int pvr2_buffer_get_status(struct pvr2_buffer *); |
71 | |
72 | /* Retrieve ID of given buffer */ |
73 | int pvr2_buffer_get_id(struct pvr2_buffer *); |
74 | |
75 | /* Start reading into given buffer (kill it if needed) */ |
76 | int pvr2_buffer_queue(struct pvr2_buffer *); |
77 | |
78 | #endif /* __PVRUSB2_IO_H */ |
79 | |