ai.c
1.68 KB
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/*====================================================================
* ai.c
*
* Copyright 1995, Silicon Graphics, Inc.
* All Rights Reserved.
*
* This is UNPUBLISHED PROPRIETARY SOURCE CODE of Silicon Graphics,
* Inc.; the contents of this file may not be disclosed to third
* parties, copied or duplicated in any form, in whole or in part,
* without the prior written permission of Silicon Graphics, Inc.
*
* RESTRICTED RIGHTS LEGEND:
* Use, duplication or disclosure by the Government is subject to
* restrictions as set forth in subdivision (c)(1)(ii) of the Rights
* in Technical Data and Computer Software clause at DFARS
* 252.227-7013, and/or in similar or successor clauses in the FAR,
* DOD or NASA FAR Supplement. Unpublished - rights reserved under the
* Copyright Laws of the United States.
*====================================================================*/
/**************************************************************************
*
* $Revision: 1.1.1.2 $
* $Date: 2002/10/29 08:06:43 $
* $Source: /root/leakn64/depot/rf/sw/bbplayer/libultra/monegi/ai/ai.c,v $
*
**************************************************************************/
#include "osint.h"
#include "rcp.h"
#include "assert.h"
/*
* Name: __osAiDeviceBusy
*
* Description:
* Determine if the audio interface is busy performing DMA operation.
*
* Globals Referenced:
* None
*/
int
__osAiDeviceBusy(void)
{
register u32 stat;
stat = IO_READ(AI_STATUS_REG);
/* Since AI is double-buffered for DMA, we only need to check for
* FIFO full and not DMA busy
*/
if (stat & (AI_STATUS_FIFO_FULL))
return(1);
else
return(0);
} /* __osAiDeviceBusy */