xref: /openbmc/linux/include/dt-bindings/dma/at91.h (revision b830f94f)
1 /* SPDX-License-Identifier: GPL-2.0-only */
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_AT91_DMA_H__
9 #define __DT_BINDINGS_AT91_DMA_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 #define AT91_DMA_CFG_FIFOCFG_HALF	(0x0 << AT91_DMA_CFG_FIFOCFG_OFFSET)	/* half FIFO (default behavior) */
25 #define AT91_DMA_CFG_FIFOCFG_ALAP	(0x1 << AT91_DMA_CFG_FIFOCFG_OFFSET)	/* largest defined AHB burst */
26 #define AT91_DMA_CFG_FIFOCFG_ASAP	(0x2 << AT91_DMA_CFG_FIFOCFG_OFFSET)	/* single AHB access */
27 
28 
29 /* ---------- XDMAC ---------- */
30 #define AT91_XDMAC_DT_MEM_IF_MASK	(0x1)
31 #define AT91_XDMAC_DT_MEM_IF_OFFSET	(13)
32 #define AT91_XDMAC_DT_MEM_IF(mem_if)	(((mem_if) & AT91_XDMAC_DT_MEM_IF_MASK) \
33 					<< AT91_XDMAC_DT_MEM_IF_OFFSET)
34 #define AT91_XDMAC_DT_GET_MEM_IF(cfg)	(((cfg) >> AT91_XDMAC_DT_MEM_IF_OFFSET) \
35 					& AT91_XDMAC_DT_MEM_IF_MASK)
36 
37 #define AT91_XDMAC_DT_PER_IF_MASK	(0x1)
38 #define AT91_XDMAC_DT_PER_IF_OFFSET	(14)
39 #define AT91_XDMAC_DT_PER_IF(per_if)	(((per_if) & AT91_XDMAC_DT_PER_IF_MASK) \
40 					<< AT91_XDMAC_DT_PER_IF_OFFSET)
41 #define AT91_XDMAC_DT_GET_PER_IF(cfg)	(((cfg) >> AT91_XDMAC_DT_PER_IF_OFFSET) \
42 					& AT91_XDMAC_DT_PER_IF_MASK)
43 
44 #define AT91_XDMAC_DT_PERID_MASK	(0x7f)
45 #define AT91_XDMAC_DT_PERID_OFFSET	(24)
46 #define AT91_XDMAC_DT_PERID(perid)	(((perid) & AT91_XDMAC_DT_PERID_MASK) \
47 					<< AT91_XDMAC_DT_PERID_OFFSET)
48 #define AT91_XDMAC_DT_GET_PERID(cfg)	(((cfg) >> AT91_XDMAC_DT_PERID_OFFSET) \
49 					& AT91_XDMAC_DT_PERID_MASK)
50 
51 #endif /* __DT_BINDINGS_AT91_DMA_H__ */
52