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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/include/dt-bindings/dma/at91.h
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/* SPDX-License-Identifier: GPL-2.0-only */

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/*

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 * This header provides macros for at91 dma bindings.

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 *

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 * Copyright (C) 2013 Ludovic Desroches <[email protected]>

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 */

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#ifndef __DT_BINDINGS_AT91_DMA_H__

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#define __DT_BINDINGS_AT91_DMA_H__

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/* ---------- HDMAC ---------- */

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/*

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 * Source and/or destination peripheral ID

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 */

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#define AT91_DMA_CFG_PER_ID_MASK	(0xff)

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#define AT91_DMA_CFG_PER_ID(id)		(id & AT91_DMA_CFG_PER_ID_MASK)

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/*

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 * FIFO configuration: it defines when a request is serviced.

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 */

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#define AT91_DMA_CFG_FIFOCFG_OFFSET	(8)

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#define AT91_DMA_CFG_FIFOCFG_MASK	(0xf << AT91_DMA_CFG_FIFOCFG_OFFSET)

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#define AT91_DMA_CFG_FIFOCFG_HALF	(0x0 << AT91_DMA_CFG_FIFOCFG_OFFSET)	/* half FIFO (default behavior) */

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#define AT91_DMA_CFG_FIFOCFG_ALAP	(0x1 << AT91_DMA_CFG_FIFOCFG_OFFSET)	/* largest defined AHB burst */

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#define AT91_DMA_CFG_FIFOCFG_ASAP	(0x2 << AT91_DMA_CFG_FIFOCFG_OFFSET)	/* single AHB access */

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/* ---------- XDMAC ---------- */

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#define AT91_XDMAC_DT_MEM_IF_MASK	(0x1)

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#define AT91_XDMAC_DT_MEM_IF_OFFSET	(13)

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#define AT91_XDMAC_DT_MEM_IF(mem_if)	(((mem_if) & AT91_XDMAC_DT_MEM_IF_MASK) \

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					<< AT91_XDMAC_DT_MEM_IF_OFFSET)

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#define AT91_XDMAC_DT_GET_MEM_IF(cfg)	(((cfg) >> AT91_XDMAC_DT_MEM_IF_OFFSET) \

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					& AT91_XDMAC_DT_MEM_IF_MASK)

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#define AT91_XDMAC_DT_PER_IF_MASK	(0x1)

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#define AT91_XDMAC_DT_PER_IF_OFFSET	(14)

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#define AT91_XDMAC_DT_PER_IF(per_if)	(((per_if) & AT91_XDMAC_DT_PER_IF_MASK) \

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					<< AT91_XDMAC_DT_PER_IF_OFFSET)

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#define AT91_XDMAC_DT_GET_PER_IF(cfg)	(((cfg) >> AT91_XDMAC_DT_PER_IF_OFFSET) \

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					& AT91_XDMAC_DT_PER_IF_MASK)

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#define AT91_XDMAC_DT_PERID_MASK	(0x7f)

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#define AT91_XDMAC_DT_PERID_OFFSET	(24)

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#define AT91_XDMAC_DT_PERID(perid)	(((perid) & AT91_XDMAC_DT_PERID_MASK) \

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					<< AT91_XDMAC_DT_PERID_OFFSET)

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#define AT91_XDMAC_DT_GET_PERID(cfg)	(((cfg) >> AT91_XDMAC_DT_PERID_OFFSET) \

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					& AT91_XDMAC_DT_PERID_MASK)

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#endif /* __DT_BINDINGS_AT91_DMA_H__ */

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