at91.h 1.9 KB

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  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. #ifndef __DT_BINDINGS_AT91_DMA_H__
  9. #define __DT_BINDINGS_AT91_DMA_H__
  10. /* ---------- HDMAC ---------- */
  11. /*
  12. * Source and/or destination peripheral ID
  13. */
  14. #define AT91_DMA_CFG_PER_ID_MASK (0xff)
  15. #define AT91_DMA_CFG_PER_ID(id) (id & AT91_DMA_CFG_PER_ID_MASK)
  16. /*
  17. * FIFO configuration: it defines when a request is serviced.
  18. */
  19. #define AT91_DMA_CFG_FIFOCFG_OFFSET (8)
  20. #define AT91_DMA_CFG_FIFOCFG_MASK (0xf << AT91_DMA_CFG_FIFOCFG_OFFSET)
  21. #define AT91_DMA_CFG_FIFOCFG_HALF (0x0 << AT91_DMA_CFG_FIFOCFG_OFFSET) /* half FIFO (default behavior) */
  22. #define AT91_DMA_CFG_FIFOCFG_ALAP (0x1 << AT91_DMA_CFG_FIFOCFG_OFFSET) /* largest defined AHB burst */
  23. #define AT91_DMA_CFG_FIFOCFG_ASAP (0x2 << AT91_DMA_CFG_FIFOCFG_OFFSET) /* single AHB access */
  24. /* ---------- XDMAC ---------- */
  25. #define AT91_XDMAC_DT_MEM_IF_MASK (0x1)
  26. #define AT91_XDMAC_DT_MEM_IF_OFFSET (13)
  27. #define AT91_XDMAC_DT_MEM_IF(mem_if) (((mem_if) & AT91_XDMAC_DT_MEM_IF_MASK) \
  28. << AT91_XDMAC_DT_MEM_IF_OFFSET)
  29. #define AT91_XDMAC_DT_GET_MEM_IF(cfg) (((cfg) >> AT91_XDMAC_DT_MEM_IF_OFFSET) \
  30. & AT91_XDMAC_DT_MEM_IF_MASK)
  31. #define AT91_XDMAC_DT_PER_IF_MASK (0x1)
  32. #define AT91_XDMAC_DT_PER_IF_OFFSET (14)
  33. #define AT91_XDMAC_DT_PER_IF(per_if) (((per_if) & AT91_XDMAC_DT_PER_IF_MASK) \
  34. << AT91_XDMAC_DT_PER_IF_OFFSET)
  35. #define AT91_XDMAC_DT_GET_PER_IF(cfg) (((cfg) >> AT91_XDMAC_DT_PER_IF_OFFSET) \
  36. & AT91_XDMAC_DT_PER_IF_MASK)
  37. #define AT91_XDMAC_DT_PERID_MASK (0x7f)
  38. #define AT91_XDMAC_DT_PERID_OFFSET (24)
  39. #define AT91_XDMAC_DT_PERID(perid) (((perid) & AT91_XDMAC_DT_PERID_MASK) \
  40. << AT91_XDMAC_DT_PERID_OFFSET)
  41. #define AT91_XDMAC_DT_GET_PERID(cfg) (((cfg) >> AT91_XDMAC_DT_PERID_OFFSET) \
  42. & AT91_XDMAC_DT_PERID_MASK)
  43. #endif /* __DT_BINDINGS_AT91_DMA_H__ */