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1/* SPDX-License-Identifier: GPL-2.0-only */2/*3 *4 * Copyright (C) 2005 Mike Isely <isely@pobox.com>5 */6#ifndef __PVRUSB2_CONTEXT_H7#define __PVRUSB2_CONTEXT_H8 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