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dma_v.h

/*
 * Copyright 2002 Integrated Device Technology, Inc.
 *          All rights reserved.
 *
 * DMA register definition.
 *
 * Author : ryan.holmQVist@idt.com
 * Date   : 20011005
 */

#ifndef _ASM_RC32434_DMA_V_H_
#define _ASM_RC32434_DMA_V_H_

#include  <asm/mach-rc32434/dma.h>
#include  <asm/mach-rc32434/rc32434.h>

#define DMA_CHAN_OFFSET       0x14
#define IS_DMA_USED(X)        (((X) & \
                        (DMA_DESC_FINI | DMA_DESC_DONE | DMA_DESC_TERM)) \
                        != 0)
#define DMA_COUNT(count)      ((count) & DMA_DESC_COUNT_MSK)

#define DMA_HALT_TIMEOUT      500

static inline int rc32434_halt_dma(struct dma_reg *ch)
{
      int timeout = 1;
      if (__raw_readl(&ch->dmac) & DMA_CHAN_RUN_BIT) {
            __raw_writel(0, &ch->dmac);
            for (timeout = DMA_HALT_TIMEOUT; timeout > 0; timeout--) {
                  if (__raw_readl(&ch->dmas) & DMA_STAT_HALT) {
                        __raw_writel(0, &ch->dmas);
                        break;
                  }
            }
      }

      return timeout ? 0 : 1;
}

static inline void rc32434_start_dma(struct dma_reg *ch, u32 dma_addr)
{
      __raw_writel(0, &ch->dmandptr);
      __raw_writel(dma_addr, &ch->dmadptr);
}

static inline void rc32434_chain_dma(struct dma_reg *ch, u32 dma_addr)
{
      __raw_writel(dma_addr, &ch->dmandptr);
}

#endif  /* _ASM_RC32434_DMA_V_H_ */

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