1 /* SPDX-License-Identifier: GPL-2.0 or BSD-3-Clause */
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_DMA_AT91_H__
9 #define __DT_BINDINGS_DMA_AT91_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 /* half FIFO (default behavior) */
25 #define AT91_DMA_CFG_FIFOCFG_HALF	(0x0 << AT91_DMA_CFG_FIFOCFG_OFFSET)
26 /* largest defined AHB burst */
27 #define AT91_DMA_CFG_FIFOCFG_ALAP	(0x1 << AT91_DMA_CFG_FIFOCFG_OFFSET)
28 /* single AHB access */
29 #define AT91_DMA_CFG_FIFOCFG_ASAP	(0x2 << AT91_DMA_CFG_FIFOCFG_OFFSET)
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) \
35 				(((mem_if) & AT91_XDMAC_DT_MEM_IF_MASK) \
36 				<< AT91_XDMAC_DT_MEM_IF_OFFSET)
37 #define AT91_XDMAC_DT_GET_MEM_IF(cfg) \
38 				(((cfg) >> AT91_XDMAC_DT_MEM_IF_OFFSET) \
39 				& AT91_XDMAC_DT_MEM_IF_MASK)
40 
41 #define AT91_XDMAC_DT_PER_IF_MASK	(0x1)
42 #define AT91_XDMAC_DT_PER_IF_OFFSET	(14)
43 #define AT91_XDMAC_DT_PER_IF(per_if) \
44 				(((per_if) & AT91_XDMAC_DT_PER_IF_MASK) \
45 				<< AT91_XDMAC_DT_PER_IF_OFFSET)
46 #define AT91_XDMAC_DT_GET_PER_IF(cfg) \
47 				(((cfg) >> AT91_XDMAC_DT_PER_IF_OFFSET) \
48 				& AT91_XDMAC_DT_PER_IF_MASK)
49 
50 #define AT91_XDMAC_DT_PERID_MASK	(0x7f)
51 #define AT91_XDMAC_DT_PERID_OFFSET	(24)
52 #define AT91_XDMAC_DT_PERID(perid)	(((perid) & AT91_XDMAC_DT_PERID_MASK) \
53 					<< AT91_XDMAC_DT_PERID_OFFSET)
54 #define AT91_XDMAC_DT_GET_PERID(cfg)	(((cfg) >> AT91_XDMAC_DT_PERID_OFFSET) \
55 					& AT91_XDMAC_DT_PERID_MASK)
56 
57 #endif /* __DT_BINDINGS_AT91_DMA_H__ */
58