firmware/target/arm/as3525/dma-target.h

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright © 2008 Rafaël Carré
  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 #include <stdbool.h>
  23 #include <stdlib.h>
  24
  25 /* DMA request lines (16 max): not specified in AS3525 datasheet, but common to
  26  * all AS3525 based models (made by SanDisk) supported by rockbox. */
  27
  28 #define DMA_PERI_SD_SLOT    2
  29 #define DMA_PERI_I2SOUT     3
  30 #define DMA_PERI_I2SIN      4
  31 #define DMA_PERI_SD         5   /* embedded storage */
  32 #define DMA_PERI_DBOP       8
  33
  34 void dma_init(void);
  35 void dma_enable_channel(int channel, void *src, void *dst, int peri,
  36                         int flow_controller, bool src_inc, bool dst_inc,
  37                         size_t size, int nwords, void (*callback)(void));
  38 inline void dma_disable_channel(int channel);
  39
  40 void dma_retain(void);
  41 void dma_release(void);