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