1 /*
2  *
3  *  Copyright (C) 2005 Mike Isely <isely@pobox.com>
4  *
5  *  This program is free software; you can redistribute it and/or modify
6  *  it under the terms of the GNU General Public License as published by
7  *  the Free Software Foundation; either version 2 of the License
8  *
9  *  This program is distributed in the hope that it will be useful,
10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12  *  GNU General Public License for more details.
13  *
14  *  You should have received a copy of the GNU General Public License
15  *  along with this program; if not, write to the Free Software
16  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
17  *
18  */
19 #ifndef __PVRUSB2_CONTEXT_H
20 #define __PVRUSB2_CONTEXT_H
21 
22 #include <linux/mutex.h>
23 #include <linux/usb.h>
24 #include <linux/workqueue.h>
25 
26 struct pvr2_hdw;     /* hardware interface - defined elsewhere */
27 struct pvr2_stream;  /* stream interface - defined elsewhere */
28 
29 struct pvr2_context;        /* All central state */
30 struct pvr2_channel;        /* One I/O pathway to a user */
31 struct pvr2_context_stream; /* Wrapper for a stream */
32 struct pvr2_ioread;         /* Low level stream structure */
33 
34 struct pvr2_context_stream {
35 	struct pvr2_channel *user;
36 	struct pvr2_stream *stream;
37 };
38 
39 struct pvr2_context {
40 	struct pvr2_channel *mc_first;
41 	struct pvr2_channel *mc_last;
42 	struct pvr2_context *exist_next;
43 	struct pvr2_context *exist_prev;
44 	struct pvr2_context *notify_next;
45 	struct pvr2_context *notify_prev;
46 	struct pvr2_hdw *hdw;
47 	struct pvr2_context_stream video_stream;
48 	struct mutex mutex;
49 	int notify_flag;
50 	int initialized_flag;
51 	int disconnect_flag;
52 
53 	/* Called after pvr2_context initialization is complete */
54 	void (*setup_func)(struct pvr2_context *);
55 
56 };
57 
58 struct pvr2_channel {
59 	struct pvr2_context *mc_head;
60 	struct pvr2_channel *mc_next;
61 	struct pvr2_channel *mc_prev;
62 	struct pvr2_context_stream *stream;
63 	struct pvr2_hdw *hdw;
64 	unsigned int input_mask;
65 	void (*check_func)(struct pvr2_channel *);
66 };
67 
68 struct pvr2_context *pvr2_context_create(struct usb_interface *intf,
69 					 const struct usb_device_id *devid,
70 					 void (*setup_func)(struct pvr2_context *));
71 void pvr2_context_disconnect(struct pvr2_context *);
72 
73 void pvr2_channel_init(struct pvr2_channel *,struct pvr2_context *);
74 void pvr2_channel_done(struct pvr2_channel *);
75 int pvr2_channel_limit_inputs(struct pvr2_channel *,unsigned int);
76 unsigned int pvr2_channel_get_limited_inputs(struct pvr2_channel *);
77 int pvr2_channel_claim_stream(struct pvr2_channel *,
78 			      struct pvr2_context_stream *);
79 struct pvr2_ioread *pvr2_channel_create_mpeg_stream(
80 	struct pvr2_context_stream *);
81 
82 int pvr2_context_global_init(void);
83 void pvr2_context_global_done(void);
84 
85 #endif /* __PVRUSB2_CONTEXT_H */
86 /*
87   Stuff for Emacs to see, in order to encourage consistent editing style:
88   *** Local Variables: ***
89   *** mode: c ***
90   *** fill-column: 75 ***
91   *** tab-width: 8 ***
92   *** c-basic-offset: 8 ***
93   *** End: ***
94   */
95