79 lines
2.5 KiB
C
79 lines
2.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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*
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* Copyright (C) 2005 Mike Isely <isely@pobox.com>
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*/
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#ifndef __PVRUSB2_IO_H
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#define __PVRUSB2_IO_H
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#include <linux/usb.h>
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#include <linux/list.h>
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typedef void (*pvr2_stream_callback)(void *);
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enum pvr2_buffer_state {
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pvr2_buffer_state_none = 0, // Not on any list
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pvr2_buffer_state_idle = 1, // Buffer is ready to be used again
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pvr2_buffer_state_queued = 2, // Buffer has been queued for filling
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pvr2_buffer_state_ready = 3, // Buffer has data available
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};
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struct pvr2_stream;
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struct pvr2_buffer;
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struct pvr2_stream_stats {
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unsigned int buffers_in_queue;
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unsigned int buffers_in_idle;
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unsigned int buffers_in_ready;
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unsigned int buffers_processed;
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unsigned int buffers_failed;
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unsigned int bytes_processed;
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};
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/* Initialize / tear down stream structure */
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struct pvr2_stream *pvr2_stream_create(void);
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void pvr2_stream_destroy(struct pvr2_stream *);
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void pvr2_stream_setup(struct pvr2_stream *,
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struct usb_device *dev,int endpoint,
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unsigned int tolerance);
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void pvr2_stream_set_callback(struct pvr2_stream *,
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pvr2_stream_callback func,
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void *data);
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void pvr2_stream_get_stats(struct pvr2_stream *,
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struct pvr2_stream_stats *,
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int zero_counts);
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/* Query / set the nominal buffer count */
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int pvr2_stream_get_buffer_count(struct pvr2_stream *);
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int pvr2_stream_set_buffer_count(struct pvr2_stream *,unsigned int);
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/* Get a pointer to a buffer that is either idle, ready, or is specified
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named. */
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struct pvr2_buffer *pvr2_stream_get_idle_buffer(struct pvr2_stream *);
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struct pvr2_buffer *pvr2_stream_get_ready_buffer(struct pvr2_stream *);
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struct pvr2_buffer *pvr2_stream_get_buffer(struct pvr2_stream *sp,int id);
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/* Find out how many buffers are idle or ready */
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int pvr2_stream_get_ready_count(struct pvr2_stream *);
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/* Kill all pending buffers and throw away any ready buffers as well */
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void pvr2_stream_kill(struct pvr2_stream *);
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/* Set up the actual storage for a buffer */
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int pvr2_buffer_set_buffer(struct pvr2_buffer *,void *ptr,unsigned int cnt);
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/* Find out size of data in the given ready buffer */
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unsigned int pvr2_buffer_get_count(struct pvr2_buffer *);
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/* Retrieve completion code for given ready buffer */
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int pvr2_buffer_get_status(struct pvr2_buffer *);
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/* Retrieve ID of given buffer */
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int pvr2_buffer_get_id(struct pvr2_buffer *);
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/* Start reading into given buffer (kill it if needed) */
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int pvr2_buffer_queue(struct pvr2_buffer *);
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#endif /* __PVRUSB2_IO_H */
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