LXR linux/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
  22struct pvr2_hdw;     /* hardware interface - defined elsewhere */
  23struct pvr2_stream;  /* stream interface - defined elsewhere */
  24
  25struct pvr2_context;        /* All central state */
  26struct pvr2_channel;        /* One I/O pathway to a user */
  27struct pvr2_context_stream; /* Wrapper for a stream */
  28struct pvr2_ioread;         /* Low level stream structure */
  29
  30struct pvr2_context_stream {
  31        struct pvr2_channel *user;
  32        struct pvr2_stream *stream;
  33};
  34
  35struct 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
  54struct 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
  64struct pvr2_context *pvr2_context_create(struct usb_interface *intf,
  65                                         const struct usb_device_id *devid,
  66                                         void (*setup_func)(struct pvr2_context *));
  67void pvr2_context_disconnect(struct pvr2_context *);
  68
  69void pvr2_channel_init(struct pvr2_channel *,struct pvr2_context *);
  70void pvr2_channel_done(struct pvr2_channel *);
  71int pvr2_channel_limit_inputs(struct pvr2_channel *,unsigned int);
  72unsigned int pvr2_channel_get_limited_inputs(struct pvr2_channel *);
  73int pvr2_channel_claim_stream(struct pvr2_channel *,
  74                              struct pvr2_context_stream *);
  75struct pvr2_ioread *pvr2_channel_create_mpeg_stream(
  76        struct pvr2_context_stream *);
  77
  78int pvr2_context_global_init(void);
  79void pvr2_context_global_done(void);
  80
  81#endif /* __PVRUSB2_CONTEXT_H */
  82