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/**************************************************************************
*
* BRIEF MODULE DESCRIPTION
* Definitions for DMA controller.
*
* Copyright 2004 IDT Inc. (rischelp@idt.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, or (at your
* option) any later version.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* 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.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*
*
**************************************************************************
* May 2004 rkt, neb.
*
* Initial Release
*
*
*
**************************************************************************
*/
#ifndef __IDT_DMA_V_H__
#define __IDT_DMA_V_H__
#include <asm/idt-boards/rc32434/rc32434_dma.h>
#include <asm/idt-boards/rc32434/rc32434.h>
#define DMA_CHAN_OFFSET 0x14
#define IS_DMA_USED(X) (((X) & (DMAD_f_m | DMAD_d_m | DMAD_t_m)) != 0)
#define DMA_COUNT(count) \
((count) & DMAD_count_m)
#define DMA_HALT_TIMEOUT 500
static inline int rc32434_halt_dma(DMA_Chan_t ch)
{
int timeout=1;
if (rc32434_readl(&ch->dmac) & DMAC_run_m) {
rc32434_writel(0, &ch->dmac);
for (timeout = DMA_HALT_TIMEOUT; timeout > 0; timeout--) {
if (rc32434_readl(&ch->dmas) & DMAS_h_m) {
rc32434_writel(0, &ch->dmas);
break;
}
}
}
return timeout ? 0 : 1;
}
static inline void rc32434_start_dma(DMA_Chan_t ch, u32 dma_addr)
{
rc32434_writel(0, &ch->dmandptr);
rc32434_writel(dma_addr, &ch->dmadptr);
}
static inline void rc32434_chain_dma(DMA_Chan_t ch, u32 dma_addr)
{
rc32434_writel(dma_addr, &ch->dmandptr);
}
#endif // __IDT_DMA_V_H__
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