arch/unicore32/include/mach/dma.h

   1 /*
   2  * linux/arch/unicore32/include/mach/dma.h
   3  *
   4  * Code specific to PKUnity SoC and UniCore ISA
   5  *
   6  * Copyright (C) 2001-2010 GUAN Xue-tao
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  */
  12 #ifndef __MACH_PUV3_DMA_H__
  13 #define __MACH_PUV3_DMA_H__
  14
  15 /*
  16  * The PKUnity has six internal DMA channels.
  17  */
  18 #define MAX_DMA_CHANNELS        6
  19
  20 typedef enum {
  21         DMA_PRIO_HIGH = 0,
  22         DMA_PRIO_MEDIUM = 1,
  23         DMA_PRIO_LOW = 2
  24 } puv3_dma_prio;
  25
  26 /*
  27  * DMA registration
  28  */
  29
  30 extern int puv3_request_dma(char *name,
  31                          puv3_dma_prio prio,
  32                          void (*irq_handler)(int, void *),
  33                          void (*err_handler)(int, void *),
  34                          void *data);
  35
  36 extern void puv3_free_dma(int dma_ch);
  37
  38 #define puv3_stop_dma(ch)               (DMAC_CONFIG(ch) &= ~DMAC_CONFIG_EN)
  39 #define puv3_resume_dma(ch)             (DMAC_CONFIG(ch) |= DMAC_CONFIG_EN)
  40
  41 #endif /* __MACH_PUV3_DMA_H__ */