include/dt-bindings/dma/at91.h

   1 /*
   2  * This header provides macros for at91 dma bindings.
   3  *
   4  * Copyright (C) 2013 Ludovic Desroches <ludovic.desroches@atmel.com>
   5  *
   6  * GPLv2 only
   7  */
   8
   9 #ifndef __DT_BINDINGS_AT91_DMA_H__
  10 #define __DT_BINDINGS_AT91_DMA_H__
  11
  12 /*
  13  * Source and/or destination peripheral ID
  14  */
  15 #define AT91_DMA_CFG_PER_ID_MASK        (0xff)
  16 #define AT91_DMA_CFG_PER_ID(id)         (id & AT91_DMA_CFG_PER_ID_MASK)
  17
  18 /*
  19  * FIFO configuration: it defines when a request is serviced.
  20  */
  21 #define AT91_DMA_CFG_FIFOCFG_OFFSET     (8)
  22 #define AT91_DMA_CFG_FIFOCFG_MASK       (0xf << AT91_DMA_CFG_FIFOCFG_OFFSET)
  23 #define AT91_DMA_CFG_FIFOCFG_HALF       (0x0 << AT91_DMA_CFG_FIFOCFG_OFFSET)    /* half FIFO (default behavior) */
  24 #define AT91_DMA_CFG_FIFOCFG_ALAP       (0x1 << AT91_DMA_CFG_FIFOCFG_OFFSET)    /* largest defined AHB burst */
  25 #define AT91_DMA_CFG_FIFOCFG_ASAP       (0x2 << AT91_DMA_CFG_FIFOCFG_OFFSET)    /* single AHB access */
  26
  27 #endif /* __DT_BINDINGS_AT91_DMA_H__ */