target/linux/aruba-2.6/files/include/asm-mips/idt-boards/rc32434/rc32434_dma_v.h

   1 /**************************************************************************
   2  *
   3  *  BRIEF MODULE DESCRIPTION
   4  *   Definitions for DMA controller.
   5  *
   6  *  Copyright 2004 IDT Inc. (rischelp@idt.com)
   7  *
   8  *  This program is free software; you can redistribute  it and/or modify it
   9  *  under  the terms of  the GNU General  Public License as published by the
  10  *  Free Software Foundation;  either version 2 of the  License, or (at your
  11  *  option) any later version.
  12  *
  13  *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
  14  *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
  15  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  16  *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
  17  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  18  *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
  19  *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  20  *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
  21  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  22  *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  23  *
  24  *  You should have received a copy of the  GNU General Public License along
  25  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  26  *  675 Mass Ave, Cambridge, MA 02139, USA.
  27  *
  28  *
  29  **************************************************************************
  30  * May 2004 rkt, neb.
  31  *
  32  * Initial Release
  33  *
  34  *
  35  *
  36  **************************************************************************
  37  */
  38
  39 #ifndef __IDT_DMA_V_H__
  40 #define __IDT_DMA_V_H__
  41
  42 #include  <asm/idt-boards/rc32434/rc32434_dma.h>
  43 #include  <asm/idt-boards/rc32434/rc32434.h>
  44
  45 #define DMA_CHAN_OFFSET  0x14
  46 #define IS_DMA_USED(X) (((X) & (DMAD_f_m | DMAD_d_m | DMAD_t_m)) != 0)
  47 #define DMA_COUNT(count)   \
  48   ((count) & DMAD_count_m)
  49
  50 #define DMA_HALT_TIMEOUT 500
  51
  52
  53 static inline int rc32434_halt_dma(DMA_Chan_t ch)
  54 {
  55         int timeout=1;
  56         if (rc32434_readl(&ch->dmac) & DMAC_run_m) {
  57                 rc32434_writel(0, &ch->dmac);
  58
  59                 for (timeout = DMA_HALT_TIMEOUT; timeout > 0; timeout--) {
  60                         if (rc32434_readl(&ch->dmas) & DMAS_h_m) {
  61                                 rc32434_writel(0, &ch->dmas);
  62                                 break;
  63                         }
  64                 }
  65
  66         }
  67
  68         return timeout ? 0 : 1;
  69 }
  70
  71 static inline void rc32434_start_dma(DMA_Chan_t ch, u32 dma_addr)
  72 {
  73         rc32434_writel(0, &ch->dmandptr);
  74         rc32434_writel(dma_addr, &ch->dmadptr);
  75 }
  76
  77 static inline void rc32434_chain_dma(DMA_Chan_t ch, u32 dma_addr)
  78 {
  79         rc32434_writel(dma_addr, &ch->dmandptr);
  80 }
  81
  82 #endif  // __IDT_DMA_V_H__
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