target/linux/rb532/files-2.6.23/include/asm-mips/rc32434/dma_v.h

   1 #ifndef __IDT_DMA_V_H__
   2 #define __IDT_DMA_V_H__
   3
   4 /*******************************************************************************
   5  *
   6  * Copyright 2002 Integrated Device Technology, Inc.
   7  *              All rights reserved.
   8  *
   9  * DMA register definition.
  10  *
  11  * File   : $Id: dma.h,v 1.3 2002/06/06 18:34:03 astichte Exp $
  12  *
  13  * Author : ryan.holmQVist@idt.com
  14  * Date   : 20011005
  15  * Update :
  16  *          $Log: dma.h,v $
  17  *          Revision 1.3  2002/06/06 18:34:03  astichte
  18  *          Added XXX_PhysicalAddress and XXX_VirtualAddress
  19  *
  20  *          Revision 1.2  2002/06/05 18:30:46  astichte
  21  *          Removed IDTField
  22  *
  23  *          Revision 1.1  2002/05/29 17:33:21  sysarch
  24  *          jba File moved from vcode/include/idt/acacia
  25  *
  26  *
  27  ******************************************************************************/
  28 #include  <asm/rc32434/dma.h>
  29 #include  <asm/rc32434/rc32434.h>
  30 #define DMA_CHAN_OFFSET  0x14
  31 #define IS_DMA_USED(X) (((X) & (DMAD_f_m | DMAD_d_m | DMAD_t_m)) != 0)
  32 #define DMA_COUNT(count)   \
  33   ((count) & DMAD_count_m)
  34
  35 #define DMA_HALT_TIMEOUT 500
  36
  37
  38 static inline int rc32434_halt_dma(DMA_Chan_t ch)
  39 {
  40         int timeout=1;
  41         if (local_readl(&ch->dmac) & DMAC_run_m) {
  42                 local_writel(0, &ch->dmac);
  43                 for (timeout = DMA_HALT_TIMEOUT; timeout > 0; timeout--) {
  44                         if (local_readl(&ch->dmas) & DMAS_h_m) {
  45                                 local_writel(0, &ch->dmas);
  46                                 break;
  47                         }
  48                 }
  49         }
  50
  51         return timeout ? 0 : 1;
  52 }
  53
  54 static inline void rc32434_start_dma(DMA_Chan_t ch, u32 dma_addr)
  55 {
  56         local_writel(0, &ch->dmandptr);
  57         local_writel(dma_addr, &ch->dmadptr);
  58 }
  59
  60 static inline void rc32434_chain_dma(DMA_Chan_t ch, u32 dma_addr)
  61 {
  62         local_writel(dma_addr, &ch->dmandptr);
  63 }
  64
  65 #endif  // __IDT_DMA_V_H__
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