target/linux/rb532/files-2.6.24/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  *
  12  * Author : ryan.holmQVist@idt.com
  13  * Date   : 20011005
  14  * Update :
  15  *          $Log: dma.h,v $
  16  *          Revision 1.3  2002/06/06 18:34:03  astichte
  17  *          Added XXX_PhysicalAddress and XXX_VirtualAddress
  18  *
  19  *          Revision 1.2  2002/06/05 18:30:46  astichte
  20  *          Removed IDTField
  21  *
  22  *          Revision 1.1  2002/05/29 17:33:21  sysarch
  23  *          jba File moved from vcode/include/idt/acacia
  24  *
  25  *
  26  ******************************************************************************/
  27 #include  <asm/rc32434/dma.h>
  28 #include  <asm/rc32434/rc32434.h>
  29 #define DMA_CHAN_OFFSET  0x14
  30 #define IS_DMA_USED(X) (((X) & (DMAD_f_m | DMAD_d_m | DMAD_t_m)) != 0)
  31 #define DMA_COUNT(count)   \
  32   ((count) & DMAD_count_m)
  33
  34 #define DMA_HALT_TIMEOUT 500
  35
  36
  37 static inline int rc32434_halt_dma(DMA_Chan_t ch)
  38 {
  39         int timeout=1;
  40         if (local_readl(&ch->dmac) & DMAC_run_m) {
  41                 local_writel(0, &ch->dmac);
  42                 for (timeout = DMA_HALT_TIMEOUT; timeout > 0; timeout--) {
  43                         if (local_readl(&ch->dmas) & DMAS_h_m) {
  44                                 local_writel(0, &ch->dmas);
  45                                 break;
  46                         }
  47                 }
  48         }
  49
  50         return timeout ? 0 : 1;
  51 }
  52
  53 static inline void rc32434_start_dma(DMA_Chan_t ch, u32 dma_addr)
  54 {
  55         local_writel(0, &ch->dmandptr);
  56         local_writel(dma_addr, &ch->dmadptr);
  57 }
  58
  59 static inline void rc32434_chain_dma(DMA_Chan_t ch, u32 dma_addr)
  60 {
  61         local_writel(dma_addr, &ch->dmandptr);
  62 }
  63
  64 #endif  // __IDT_DMA_V_H__
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