mirror of https://gitee.com/openkylin/linux.git
28 lines
904 B
C
28 lines
904 B
C
/*
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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 <ludovic.desroches@atmel.com>
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*
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* GPLv2 only
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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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/*
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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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#endif /* __DT_BINDINGS_AT91_DMA_H__ */
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