at91.h revision 273712 
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
9#ifndef __DT_BINDINGS_AT91_DMA_H__
10#define __DT_BINDINGS_AT91_DMA_H__
11
12/*
13 * Source and/or destination peripheral ID
14 */
15#define AT91_DMA_CFG_PER_ID_MASK	(0xff)
16#define AT91_DMA_CFG_PER_ID(id)		(id & AT91_DMA_CFG_PER_ID_MASK)
17
18/*
19 * FIFO configuration: it defines when a request is serviced.
20 */
21#define AT91_DMA_CFG_FIFOCFG_OFFSET	(8)
22#define AT91_DMA_CFG_FIFOCFG_MASK	(0xf << AT91_DMA_CFG_FIFOCFG_OFFSET)
23#define AT91_DMA_CFG_FIFOCFG_HALF	(0x0 << AT91_DMA_CFG_FIFOCFG_OFFSET)	/* half FIFO (default behavior) */
24#define AT91_DMA_CFG_FIFOCFG_ALAP	(0x1 << AT91_DMA_CFG_FIFOCFG_OFFSET)	/* largest defined AHB burst */
25#define AT91_DMA_CFG_FIFOCFG_ASAP	(0x2 << AT91_DMA_CFG_FIFOCFG_OFFSET)	/* single AHB access */
26
27#endif /* __DT_BINDINGS_AT91_DMA_H__ */
28