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