drivers/media/usb/pvrusb2/pvrusb2-context.h

   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  */
  15 #ifndef __PVRUSB2_CONTEXT_H
  16 #define __PVRUSB2_CONTEXT_H
  17
  18 #include <linux/mutex.h>
  19 #include <linux/usb.h>
  20 #include <linux/workqueue.h>
  21
  22 struct pvr2_hdw;     /* hardware interface - defined elsewhere */
  23 struct pvr2_stream;  /* stream interface - defined elsewhere */
  24
  25 struct pvr2_context;        /* All central state */
  26 struct pvr2_channel;        /* One I/O pathway to a user */
  27 struct pvr2_context_stream; /* Wrapper for a stream */
  28 struct pvr2_ioread;         /* Low level stream structure */
  29
  30 struct pvr2_context_stream {
  31         struct pvr2_channel *user;
  32         struct pvr2_stream *stream;
  33 };
  34
  35 struct pvr2_context {
  36         struct pvr2_channel *mc_first;
  37         struct pvr2_channel *mc_last;
  38         struct pvr2_context *exist_next;
  39         struct pvr2_context *exist_prev;
  40         struct pvr2_context *notify_next;
  41         struct pvr2_context *notify_prev;
  42         struct pvr2_hdw *hdw;
  43         struct pvr2_context_stream video_stream;
  44         struct mutex mutex;
  45         int notify_flag;
  46         int initialized_flag;
  47         int disconnect_flag;
  48
  49         /* Called after pvr2_context initialization is complete */
  50         void (*setup_func)(struct pvr2_context *);
  51
  52 };
  53
  54 struct pvr2_channel {
  55         struct pvr2_context *mc_head;
  56         struct pvr2_channel *mc_next;
  57         struct pvr2_channel *mc_prev;
  58         struct pvr2_context_stream *stream;
  59         struct pvr2_hdw *hdw;
  60         unsigned int input_mask;
  61         void (*check_func)(struct pvr2_channel *);
  62 };
  63
  64 struct pvr2_context *pvr2_context_create(struct usb_interface *intf,
  65                                          const struct usb_device_id *devid,
  66                                          void (*setup_func)(struct pvr2_context *));
  67 void pvr2_context_disconnect(struct pvr2_context *);
  68
  69 void pvr2_channel_init(struct pvr2_channel *,struct pvr2_context *);
  70 void pvr2_channel_done(struct pvr2_channel *);
  71 int pvr2_channel_limit_inputs(struct pvr2_channel *,unsigned int);
  72 unsigned int pvr2_channel_get_limited_inputs(struct pvr2_channel *);
  73 int pvr2_channel_claim_stream(struct pvr2_channel *,
  74                               struct pvr2_context_stream *);
  75 struct pvr2_ioread *pvr2_channel_create_mpeg_stream(
  76         struct pvr2_context_stream *);
  77
  78 int pvr2_context_global_init(void);
  79 void pvr2_context_global_done(void);
  80
  81 #endif /* __PVRUSB2_CONTEXT_H */