firmware/target/arm/tms320dm320/dma-target.h

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
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   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id: $
   9  *
  10  * Copyright (C) 2011 by Tomasz Moń
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  18  * KIND, either express or implied.
  19  *
  20  ****************************************************************************/
  21
  22 #ifndef DMA_TARGET_H
  23 #define DMA_TARGET_H
  24
  25 /* These defines match DMA Select bits */
  26 #define DMA_PERIPHERAL_MTC   0
  27 #define DMA_PERIPHERAL_SIF   1
  28 #define DMA_PERIPHERAL_MS    2
  29 #define DMA_PERIPHERAL_MMCSD 3
  30 #define DMA_PERIPHERAL_DSP   4
  31
  32 /* These defines match DMA Burst bits */
  33 /* 1 burst DMA - address must be 4 byte aligned */
  34 #define DMA_MODE_1_BURST 0
  35 /* 4 burst DMA - address must be 16 byte aligned */
  36 #define DMA_MODE_4_BURST 1
  37 /* 8 burst DMA - address must be 32 byte aligned */
  38 #define DMA_MODE_8_BURST 2
  39
  40 void dma_init(void);
  41 int dma_request_channel(int peripheral, int mode);
  42 void dma_release_channel(int channel);
  43
  44 #endif