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/*
(c) Copyright 2001-2009 The world wide DirectFB Open Source Community (directfb.org)
(c) Copyright 2000-2004 Convergence (integrated media) GmbH
All rights reserved.
Written by Denis Oliver Kropp <dok@directfb.org>,
Andreas Hundt <andi@fischlustig.de>,
Sven Neumann <neo@directfb.org>,
Ville Syrjälä <syrjala@sci.fi> and
Claudio Ciccani <klan@users.sf.net>.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
#ifndef __MATROX_MMIO_H__
#define __MATROX_MMIO_H__
#include <dfb_types.h>
#include "matrox.h"
static inline void
mga_out8(volatile u8 *mmioaddr, u8 value, u32 reg)
{
*((volatile u8*)(mmioaddr+reg)) = value;
}
static inline void
mga_out32(volatile u8 *mmioaddr, u32 value, u32 reg)
{
#ifdef __powerpc__
asm volatile("stwbrx %0,%1,%2;eieio" : : "r"(value), "b"(reg), "r"(mmioaddr) : "memory");
#else
*((volatile u32*)(mmioaddr+reg)) = value;
#endif
}
static inline u8
mga_in8(volatile u8 *mmioaddr, u32 reg)
{
return *((volatile u8*)(mmioaddr+reg));
}
static inline u32
mga_in32(volatile u8 *mmioaddr, u32 reg)
{
#ifdef __powerpc__
u32 value;
asm volatile("lwbrx %0,%1,%2;eieio" : "=r"(value) : "b"(reg), "r"(mmioaddr));
return value;
#else
return *((volatile u32*)(mmioaddr+reg));
#endif
}
/* Wait for idle accelerator and DMA */
static inline void
mga_waitidle(MatroxDriverData *mdrv, MatroxDeviceData *mdev)
{
while ((mga_in32(mdrv->mmio_base, STATUS) & (DWGENGSTS | ENDPRDMASTS)) != mdev->idle_status) {
mdev->idle_waitcycles++;
}
}
/* Wait for fifo space */
static inline void
mga_waitfifo(MatroxDriverData *mdrv, MatroxDeviceData *mdev, unsigned int space)
{
mdev->waitfifo_sum += space;
mdev->waitfifo_calls++;
if (mdev->fifo_space < space) {
do { /* not needed on a G400,
hardware does retries on writing if FIFO is full,
but results in DMA problems */
mdev->fifo_space = mga_in32(mdrv->mmio_base, FIFOSTATUS) & 0xff;
mdev->fifo_waitcycles++;
} while (mdev->fifo_space < space);
}
else {
mdev->fifo_cache_hits++;
}
mdev->fifo_space -= space;
}
static inline void
mga_out_dac( volatile u8 *mmioaddr, u8 reg, u8 val )
{
mga_out8( mmioaddr, reg, DAC_INDEX );
mga_out8( mmioaddr, val, DAC_DATA );
}
static inline u8
mga_in_dac( volatile u8 *mmioaddr, u8 reg )
{
mga_out8( mmioaddr, reg, DAC_INDEX );
return mga_in8( mmioaddr, DAC_DATA );
}
#endif
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