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

   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
  13struct pvr2_hdw;     /* hardware interface - defined elsewhere */
  14struct pvr2_stream;  /* stream interface - defined elsewhere */
  15
  16struct pvr2_context;        /* All central state */
  17struct pvr2_channel;        /* One I/O pathway to a user */
  18struct pvr2_context_stream; /* Wrapper for a stream */
  19struct pvr2_ioread;         /* Low level stream structure */
  20
  21struct pvr2_context_stream {
  22        struct pvr2_channel *user;
  23        struct pvr2_stream *stream;
  24};
  25
  26struct 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
  45struct 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
  55struct pvr2_context *pvr2_context_create(struct usb_interface *intf,
  56                                         const struct usb_device_id *devid,
  57                                         void (*setup_func)(struct pvr2_context *));
  58void pvr2_context_disconnect(struct pvr2_context *);
  59
  60void pvr2_channel_init(struct pvr2_channel *,struct pvr2_context *);
  61void pvr2_channel_done(struct pvr2_channel *);
  62int pvr2_channel_limit_inputs(struct pvr2_channel *,unsigned int);
  63unsigned int pvr2_channel_get_limited_inputs(struct pvr2_channel *);
  64int pvr2_channel_claim_stream(struct pvr2_channel *,
  65                              struct pvr2_context_stream *);
  66struct pvr2_ioread *pvr2_channel_create_mpeg_stream(
  67        struct pvr2_context_stream *);
  68
  69int pvr2_context_global_init(void);
  70void pvr2_context_global_done(void);
  71
  72#endif /* __PVRUSB2_CONTEXT_H */
  73