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/*
*
* $Id$
*
* Copyright (C) 2005 Mike Isely <isely@pobox.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#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;
/* 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);
/* Query / set the nominal buffer count */
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 */
/*
Stuff for Emacs to see, in order to encourage consistent editing style:
*** Local Variables: ***
*** mode: c ***
*** fill-column: 75 ***
*** tab-width: 8 ***
*** c-basic-offset: 8 ***
*** End: ***
*/
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