apps/include/cdi/dma.h

   1 /*
   2  * Copyright (c) 2009 Janosch Gräf
   3  *
   4  * This program is free software. It comes without any warranty, to
   5  * the extent permitted by applicable law. You can redistribute it
   6  * and/or modify it under the terms of the Do What The Fuck You Want
   7  * To Public License, Version 2, as published by Sam Hocevar. See
   8  * http://sam.zoy.org/projects/COPYING.WTFPL for more details.
   9  */
  10
  11 #ifndef _CDI_DMA_H_
  12 #define _CDI_DMA_H_
  13
  14 #include <sys/types.h>
  15 #include <dma.h>
  16 #include <string.h>
  17 #include <stdint.h>
  18
  19 // Geraet   => Speicher
  20 #define CDI_DMA_MODE_READ           DMA_MODE_READ
  21 // Speicher => Geraet
  22 #define CDI_DMA_MODE_WRITE          DMA_MODE_WRITE
  23 #define CDI_DMA_MODE_ON_DEMAND      DMA_MODE_ON_DEMAND
  24 #define CDI_DMA_MODE_SINGLE         DMA_MODE_SINGLE
  25 #define CDI_DMA_MODE_BLOCK          DMA_MODE_BLOCK
  26
  27 struct cdi_dma_handle {
  28   uint8_t channel;
  29   size_t length;
  30   uint8_t mode;
  31   void *buffer;
  32   void *dmabuf; ///< @note meinOS specific
  33 };
  34
  35 int cdi_dma_read(struct cdi_dma_handle *handle);
  36 int cdi_dma_write(struct cdi_dma_handle *handle);
  37 int cdi_dma_close(struct cdi_dma_handle *handle);
  38
  39 int cdi_dma_open(struct cdi_dma_handle *handle,uint8_t channel,uint8_t mode,size_t length,void* buffer);
  40
  41 #endif