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 /* ---------- HDMAC ---------- */
  13
  14 /*
  15  * Source and/or destination peripheral ID
  16  */
  17 #define AT91_DMA_CFG_PER_ID_MASK        (0xff)
  18 #define AT91_DMA_CFG_PER_ID(id)         (id & AT91_DMA_CFG_PER_ID_MASK)
  19
  20 /*
  21  * FIFO configuration: it defines when a request is serviced.
  22  */
  23 #define AT91_DMA_CFG_FIFOCFG_OFFSET     (8)
  24 #define AT91_DMA_CFG_FIFOCFG_MASK       (0xf << AT91_DMA_CFG_FIFOCFG_OFFSET)
  25 #define AT91_DMA_CFG_FIFOCFG_HALF       (0x0 << AT91_DMA_CFG_FIFOCFG_OFFSET)    /* half FIFO (default behavior) */
  26 #define AT91_DMA_CFG_FIFOCFG_ALAP       (0x1 << AT91_DMA_CFG_FIFOCFG_OFFSET)    /* largest defined AHB burst */
  27 #define AT91_DMA_CFG_FIFOCFG_ASAP       (0x2 << AT91_DMA_CFG_FIFOCFG_OFFSET)    /* single AHB access */
  28
  29
  30 /* ---------- XDMAC ---------- */
  31 #define AT91_XDMAC_DT_MEM_IF_MASK       (0x1)
  32 #define AT91_XDMAC_DT_MEM_IF_OFFSET     (13)
  33 #define AT91_XDMAC_DT_MEM_IF(mem_if)    (((mem_if) & AT91_XDMAC_DT_MEM_IF_MASK) \
  34                                         << AT91_XDMAC_DT_MEM_IF_OFFSET)
  35 #define AT91_XDMAC_DT_GET_MEM_IF(cfg)   (((cfg) >> AT91_XDMAC_DT_MEM_IF_OFFSET) \
  36                                         & AT91_XDMAC_DT_MEM_IF_MASK)
  37
  38 #define AT91_XDMAC_DT_PER_IF_MASK       (0x1)
  39 #define AT91_XDMAC_DT_PER_IF_OFFSET     (14)
  40 #define AT91_XDMAC_DT_PER_IF(per_if)    (((per_if) & AT91_XDMAC_DT_PER_IF_MASK) \
  41                                         << AT91_XDMAC_DT_PER_IF_OFFSET)
  42 #define AT91_XDMAC_DT_GET_PER_IF(cfg)   (((cfg) >> AT91_XDMAC_DT_PER_IF_OFFSET) \
  43                                         & AT91_XDMAC_DT_PER_IF_MASK)
  44
  45 #define AT91_XDMAC_DT_PERID_MASK        (0x7f)
  46 #define AT91_XDMAC_DT_PERID_OFFSET      (24)
  47 #define AT91_XDMAC_DT_PERID(perid)      (((perid) & AT91_XDMAC_DT_PERID_MASK) \
  48                                         << AT91_XDMAC_DT_PERID_OFFSET)
  49 #define AT91_XDMAC_DT_GET_PERID(cfg)    (((cfg) >> AT91_XDMAC_DT_PERID_OFFSET) \
  50                                         & AT91_XDMAC_DT_PERID_MASK)
  51
  52 #endif /* __DT_BINDINGS_AT91_DMA_H__ */