1/*
2 *  $Id: pvrusb2-context.h,v 1.1.1.1 2007/08/03 18:52:41 Exp $
3 *
4 *  Copyright (C) 2005 Mike Isely <isely@pobox.com>
5 *
6 *  This program is free software; you can redistribute it and/or modify
7 *  it under the terms of the GNU General Public License as published by
8 *  the Free Software Foundation; either version 2 of the License
9 *
10 *  This program is distributed in the hope that it will be useful,
11 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
12 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13 *  GNU General Public License for more details.
14 *
15 *  You should have received a copy of the GNU General Public License
16 *  along with this program; if not, write to the Free Software
17 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
18 *
19 */
20#ifndef __PVRUSB2_BASE_H
21#define __PVRUSB2_BASE_H
22
23#include <linux/mutex.h>
24#include <linux/usb.h>
25#include <linux/workqueue.h>
26
27struct pvr2_hdw;     /* hardware interface - defined elsewhere */
28struct pvr2_stream;  /* stream interface - defined elsewhere */
29
30struct pvr2_context;        /* All central state */
31struct pvr2_channel;        /* One I/O pathway to a user */
32struct pvr2_context_stream; /* Wrapper for a stream */
33struct pvr2_crit_reg;       /* Critical region pointer */
34struct pvr2_ioread;         /* Low level stream structure */
35
36struct pvr2_context_stream {
37	struct pvr2_channel *user;
38	struct pvr2_stream *stream;
39};
40
41struct pvr2_context {
42	struct pvr2_channel *mc_first;
43	struct pvr2_channel *mc_last;
44	struct pvr2_hdw *hdw;
45	struct pvr2_context_stream video_stream;
46	struct mutex mutex;
47	int disconnect_flag;
48
49	/* Called after pvr2_context initialization is complete */
50	void (*setup_func)(struct pvr2_context *);
51
52	/* Work queue overhead for out-of-line processing */
53	struct workqueue_struct *workqueue;
54	struct work_struct workinit;
55	struct work_struct workpoll;
56};
57
58struct 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	void (*check_func)(struct pvr2_channel *);
65};
66
67void pvr2_context_enter(struct pvr2_context *);
68void pvr2_context_exit(struct pvr2_context *);
69
70struct pvr2_context *pvr2_context_create(struct usb_interface *intf,
71					 const struct usb_device_id *devid,
72					 void (*setup_func)(struct pvr2_context *));
73void pvr2_context_disconnect(struct pvr2_context *);
74
75void pvr2_channel_init(struct pvr2_channel *,struct pvr2_context *);
76void pvr2_channel_done(struct pvr2_channel *);
77int pvr2_channel_claim_stream(struct pvr2_channel *,
78			      struct pvr2_context_stream *);
79struct pvr2_ioread *pvr2_channel_create_mpeg_stream(
80	struct pvr2_context_stream *);
81
82
83#endif /* __PVRUSB2_CONTEXT_H */
84/*
85  Stuff for Emacs to see, in order to encourage consistent editing style:
86  *** Local Variables: ***
87  *** mode: c ***
88  *** fill-column: 75 ***
89  *** tab-width: 8 ***
90  *** c-basic-offset: 8 ***
91  *** End: ***
92  */
93