1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  *
4  *  Copyright (C) 2005 Mike Isely <isely@pobox.com>
5  */
6 #ifndef __PVRUSB2_CONTEXT_H
7 #define __PVRUSB2_CONTEXT_H
8 
9 #include <linux/mutex.h>
10 #include <linux/usb.h>
11 #include <linux/workqueue.h>
12 
13 struct pvr2_hdw;     /* hardware interface - defined elsewhere */
14 struct pvr2_stream;  /* stream interface - defined elsewhere */
15 
16 struct pvr2_context;        /* All central state */
17 struct pvr2_channel;        /* One I/O pathway to a user */
18 struct pvr2_context_stream; /* Wrapper for a stream */
19 struct pvr2_ioread;         /* Low level stream structure */
20 
21 struct pvr2_context_stream {
22 	struct pvr2_channel *user;
23 	struct pvr2_stream *stream;
24 };
25 
26 struct pvr2_context {
27 	struct pvr2_channel *mc_first;
28 	struct pvr2_channel *mc_last;
29 	struct pvr2_context *exist_next;
30 	struct pvr2_context *exist_prev;
31 	struct pvr2_context *notify_next;
32 	struct pvr2_context *notify_prev;
33 	struct pvr2_hdw *hdw;
34 	struct pvr2_context_stream video_stream;
35 	struct mutex mutex;
36 	int notify_flag;
37 	int initialized_flag;
38 	int disconnect_flag;
39 
40 	/* Called after pvr2_context initialization is complete */
41 	void (*setup_func)(struct pvr2_context *);
42 
43 };
44 
45 struct pvr2_channel {
46 	struct pvr2_context *mc_head;
47 	struct pvr2_channel *mc_next;
48 	struct pvr2_channel *mc_prev;
49 	struct pvr2_context_stream *stream;
50 	struct pvr2_hdw *hdw;
51 	unsigned int input_mask;
52 	void (*check_func)(struct pvr2_channel *);
53 };
54 
55 struct pvr2_context *pvr2_context_create(struct usb_interface *intf,
56 					 const struct usb_device_id *devid,
57 					 void (*setup_func)(struct pvr2_context *));
58 void pvr2_context_disconnect(struct pvr2_context *);
59 
60 void pvr2_channel_init(struct pvr2_channel *,struct pvr2_context *);
61 void pvr2_channel_done(struct pvr2_channel *);
62 int pvr2_channel_limit_inputs(struct pvr2_channel *,unsigned int);
63 unsigned int pvr2_channel_get_limited_inputs(struct pvr2_channel *);
64 int pvr2_channel_claim_stream(struct pvr2_channel *,
65 			      struct pvr2_context_stream *);
66 struct pvr2_ioread *pvr2_channel_create_mpeg_stream(
67 	struct pvr2_context_stream *);
68 
69 int pvr2_context_global_init(void);
70 void pvr2_context_global_done(void);
71 
72 #endif /* __PVRUSB2_CONTEXT_H */
73