/* * * $Id$ * * 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_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 */ /* 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: *** */