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      1 /*	$NetBSD: at91.h,v 1.1.1.2 2020/01/03 14:33:03 skrll Exp $	*/
      2 
      3 /* SPDX-License-Identifier: GPL-2.0-only */
      4 /*
      5  * This header provides macros for at91 dma bindings.
      6  *
      7  * Copyright (C) 2013 Ludovic Desroches <ludovic.desroches (at) atmel.com>
      8  */
      9 
     10 #ifndef __DT_BINDINGS_AT91_DMA_H__
     11 #define __DT_BINDINGS_AT91_DMA_H__
     12 
     13 /* ---------- HDMAC ---------- */
     14 
     15 /*
     16  * Source and/or destination peripheral ID
     17  */
     18 #define AT91_DMA_CFG_PER_ID_MASK	(0xff)
     19 #define AT91_DMA_CFG_PER_ID(id)		(id & AT91_DMA_CFG_PER_ID_MASK)
     20 
     21 /*
     22  * FIFO configuration: it defines when a request is serviced.
     23  */
     24 #define AT91_DMA_CFG_FIFOCFG_OFFSET	(8)
     25 #define AT91_DMA_CFG_FIFOCFG_MASK	(0xf << AT91_DMA_CFG_FIFOCFG_OFFSET)
     26 #define AT91_DMA_CFG_FIFOCFG_HALF	(0x0 << AT91_DMA_CFG_FIFOCFG_OFFSET)	/* half FIFO (default behavior) */
     27 #define AT91_DMA_CFG_FIFOCFG_ALAP	(0x1 << AT91_DMA_CFG_FIFOCFG_OFFSET)	/* largest defined AHB burst */
     28 #define AT91_DMA_CFG_FIFOCFG_ASAP	(0x2 << AT91_DMA_CFG_FIFOCFG_OFFSET)	/* single AHB access */
     29 
     30 
     31 /* ---------- XDMAC ---------- */
     32 #define AT91_XDMAC_DT_MEM_IF_MASK	(0x1)
     33 #define AT91_XDMAC_DT_MEM_IF_OFFSET	(13)
     34 #define AT91_XDMAC_DT_MEM_IF(mem_if)	(((mem_if) & AT91_XDMAC_DT_MEM_IF_MASK) \
     35 					<< AT91_XDMAC_DT_MEM_IF_OFFSET)
     36 #define AT91_XDMAC_DT_GET_MEM_IF(cfg)	(((cfg) >> AT91_XDMAC_DT_MEM_IF_OFFSET) \
     37 					& AT91_XDMAC_DT_MEM_IF_MASK)
     38 
     39 #define AT91_XDMAC_DT_PER_IF_MASK	(0x1)
     40 #define AT91_XDMAC_DT_PER_IF_OFFSET	(14)
     41 #define AT91_XDMAC_DT_PER_IF(per_if)	(((per_if) & AT91_XDMAC_DT_PER_IF_MASK) \
     42 					<< AT91_XDMAC_DT_PER_IF_OFFSET)
     43 #define AT91_XDMAC_DT_GET_PER_IF(cfg)	(((cfg) >> AT91_XDMAC_DT_PER_IF_OFFSET) \
     44 					& AT91_XDMAC_DT_PER_IF_MASK)
     45 
     46 #define AT91_XDMAC_DT_PERID_MASK	(0x7f)
     47 #define AT91_XDMAC_DT_PERID_OFFSET	(24)
     48 #define AT91_XDMAC_DT_PERID(perid)	(((perid) & AT91_XDMAC_DT_PERID_MASK) \
     49 					<< AT91_XDMAC_DT_PERID_OFFSET)
     50 #define AT91_XDMAC_DT_GET_PERID(cfg)	(((cfg) >> AT91_XDMAC_DT_PERID_OFFSET) \
     51 					& AT91_XDMAC_DT_PERID_MASK)
     52 
     53 #endif /* __DT_BINDINGS_AT91_DMA_H__ */
     54