include/dt-bindings/dma/at91.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * This header provides macros for at91 dma bindings.
   4  *
   5  * Copyright (C) 2013 Ludovic Desroches <ludovic.desroches@atmel.com>
   6  */
   7
   8 #ifndef __DT_BINDINGS_AT91_DMA_H__
   9 #define __DT_BINDINGS_AT91_DMA_H__
  10
  11 /* ---------- HDMAC ---------- */
  12
  13 /*
  14  * Source and/or destination peripheral ID
  15  */
  16 #define AT91_DMA_CFG_PER_ID_MASK        (0xff)
  17 #define AT91_DMA_CFG_PER_ID(id)         (id & AT91_DMA_CFG_PER_ID_MASK)
  18
  19 /*
  20  * FIFO configuration: it defines when a request is serviced.
  21  */
  22 #define AT91_DMA_CFG_FIFOCFG_OFFSET     (8)
  23 #define AT91_DMA_CFG_FIFOCFG_MASK       (0xf << AT91_DMA_CFG_FIFOCFG_OFFSET)
  24 #define AT91_DMA_CFG_FIFOCFG_HALF       (0x0 << AT91_DMA_CFG_FIFOCFG_OFFSET)    /* half FIFO (default behavior) */
  25 #define AT91_DMA_CFG_FIFOCFG_ALAP       (0x1 << AT91_DMA_CFG_FIFOCFG_OFFSET)    /* largest defined AHB burst */
  26 #define AT91_DMA_CFG_FIFOCFG_ASAP       (0x2 << AT91_DMA_CFG_FIFOCFG_OFFSET)    /* single AHB access */
  27
  28
  29 /* ---------- XDMAC ---------- */
  30 #define AT91_XDMAC_DT_MEM_IF_MASK       (0x1)
  31 #define AT91_XDMAC_DT_MEM_IF_OFFSET     (13)
  32 #define AT91_XDMAC_DT_MEM_IF(mem_if)    (((mem_if) & AT91_XDMAC_DT_MEM_IF_MASK) \
  33                                         << AT91_XDMAC_DT_MEM_IF_OFFSET)
  34 #define AT91_XDMAC_DT_GET_MEM_IF(cfg)   (((cfg) >> AT91_XDMAC_DT_MEM_IF_OFFSET) \
  35                                         & AT91_XDMAC_DT_MEM_IF_MASK)
  36
  37 #define AT91_XDMAC_DT_PER_IF_MASK       (0x1)
  38 #define AT91_XDMAC_DT_PER_IF_OFFSET     (14)
  39 #define AT91_XDMAC_DT_PER_IF(per_if)    (((per_if) & AT91_XDMAC_DT_PER_IF_MASK) \
  40                                         << AT91_XDMAC_DT_PER_IF_OFFSET)
  41 #define AT91_XDMAC_DT_GET_PER_IF(cfg)   (((cfg) >> AT91_XDMAC_DT_PER_IF_OFFSET) \
  42                                         & AT91_XDMAC_DT_PER_IF_MASK)
  43
  44 #define AT91_XDMAC_DT_PERID_MASK        (0x7f)
  45 #define AT91_XDMAC_DT_PERID_OFFSET      (24)
  46 #define AT91_XDMAC_DT_PERID(perid)      (((perid) & AT91_XDMAC_DT_PERID_MASK) \
  47                                         << AT91_XDMAC_DT_PERID_OFFSET)
  48 #define AT91_XDMAC_DT_GET_PERID(cfg)    (((cfg) >> AT91_XDMAC_DT_PERID_OFFSET) \
  49                                         & AT91_XDMAC_DT_PERID_MASK)
  50
  51 #endif /* __DT_BINDINGS_AT91_DMA_H__ */