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/*
* Copyright 1998 by Alan Hourihane, Wigan, England.
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of Alan Hourihane not be used in
* advertising or publicity pertaining to distribution of the software without
* specific, written prior permission. Alan Hourihane makes no representations
* about the suitability of this software for any purpose. It is provided
* "as is" without express or implied warranty.
*
* ALAN HOURIHANE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL ALAN HOURIHANE BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*
* Authors: Alan Hourihane, <alanh@fairlite.demon.co.uk>
*
* Generic RAMDAC access routines.
*/
/* $XFree86: xc/programs/Xserver/hw/xfree86/ramdac/xf86RamDac.c,v 1.6 2000/09/26 15:57:21 tsi Exp $ */
#include "xf86.h"
#include "xf86_OSproc.h"
#include "xf86_ansic.h"
#include "xf86RamDacPriv.h"
int RamDacHWPrivateIndex = -1;
int RamDacScreenPrivateIndex = -1;
RamDacRecPtr
RamDacCreateInfoRec()
{
RamDacRecPtr infoRec;
infoRec = xcalloc(1, sizeof(RamDacRec));
return infoRec;
}
RamDacHelperRecPtr
RamDacHelperCreateInfoRec()
{
RamDacHelperRecPtr infoRec;
infoRec = xcalloc(1, sizeof(RamDacHelperRec));
return infoRec;
}
void
RamDacDestroyInfoRec(RamDacRecPtr infoRec)
{
xfree(infoRec);
}
void
RamDacHelperDestroyInfoRec(RamDacHelperRecPtr infoRec)
{
xfree(infoRec);
}
Bool
RamDacInit(ScrnInfoPtr pScrn, RamDacRecPtr ramdacPriv)
{
RamDacHWRecPtr ramdacHWPtr;
RamDacRegRecPtr ramdacReg;
RamDacScreenRecPtr ramdacScrPtr;
/*
* make sure the RamDacRec is allocated
*/
if (!RamDacGetRec(pScrn))
return FALSE;
ramdacHWPtr = RAMDACHWPTR(pScrn);
ramdacReg = &ramdacHWPtr->ModeReg;
ramdacScrPtr = ((RamDacScreenRecPtr)
(pScrn)->privates[RamDacGetScreenIndex()].ptr);
ramdacScrPtr->RamDacRec = ramdacPriv;
return(TRUE);
}
void
RamDacGetRecPrivate()
{
if (RamDacHWPrivateIndex < 0)
RamDacHWPrivateIndex = xf86AllocateScrnInfoPrivateIndex();
if (RamDacScreenPrivateIndex < 0)
RamDacScreenPrivateIndex = xf86AllocateScrnInfoPrivateIndex();
return;
}
Bool
RamDacGetRec(ScrnInfoPtr scrp)
{
RamDacRegRecPtr regp;
RamDacGetRecPrivate();
/*
* New privates are always set to NULL, so we can check if the allocation
* has already been done.
*/
if (scrp->privates[RamDacHWPrivateIndex].ptr != NULL)
return TRUE;
if (scrp->privates[RamDacScreenPrivateIndex].ptr != NULL)
return TRUE;
scrp->privates[RamDacHWPrivateIndex].ptr =
xnfcalloc(sizeof(RamDacHWRec), 1);
scrp->privates[RamDacScreenPrivateIndex].ptr =
xnfcalloc(sizeof(RamDacScreenRec), 1);
/* Does this really belong here? */
regp = &((RamDacHWRecPtr)scrp->privates[RamDacHWPrivateIndex].ptr)->ModeReg;
return TRUE;
}
void
RamDacFreeRec(ScrnInfoPtr pScrn)
{
RamDacHWRecPtr ramdacHWPtr;
RamDacScreenRecPtr ramdacScrPtr;
if (RamDacHWPrivateIndex < 0)
return;
if (RamDacScreenPrivateIndex < 0)
return;
ramdacHWPtr = RAMDACHWPTR(pScrn);
ramdacScrPtr = ((RamDacScreenRecPtr)
(pScrn)->privates[RamDacGetScreenIndex()].ptr);
if (ramdacHWPtr)
xfree(ramdacHWPtr);
ramdacHWPtr = NULL;
if (ramdacScrPtr)
xfree(ramdacScrPtr);
ramdacScrPtr = NULL;
}
int
RamDacGetHWIndex()
{
return RamDacHWPrivateIndex;
}
int
RamDacGetScreenIndex()
{
return RamDacScreenPrivateIndex;
}
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