1 /*
2  * Header for the SUDMAC driver
3  *
4  * Copyright (C) 2013 Renesas Solutions Corp.
5  *
6  * This is free software; you can redistribute it and/or modify
7  * it under the terms of version 2 of the GNU General Public License as
8  * published by the Free Software Foundation.
9  */
10 #ifndef SUDMAC_H
11 #define SUDMAC_H
12 
13 #include <linux/dmaengine.h>
14 #include <linux/shdma-base.h>
15 #include <linux/types.h>
16 
17 /* Used by slave DMA clients to request DMA to/from a specific peripheral */
18 struct sudmac_slave {
19 	struct shdma_slave	shdma_slave;	/* Set by the platform */
20 };
21 
22 /*
23  * Supplied by platforms to specify, how a DMA channel has to be configured for
24  * a certain peripheral
25  */
26 struct sudmac_slave_config {
27 	int		slave_id;
28 };
29 
30 struct sudmac_channel {
31 	unsigned long	offset;
32 	unsigned long	config;
33 	unsigned long	wait;		/* The configuable range is 0 to 3 */
34 	unsigned long	dint_end_bit;
35 };
36 
37 struct sudmac_pdata {
38 	const struct sudmac_slave_config *slave;
39 	int slave_num;
40 	const struct sudmac_channel *channel;
41 	int channel_num;
42 };
43 
44 /* Definitions for the sudmac_channel.config */
45 #define SUDMAC_TX_BUFFER_MODE	BIT(0)
46 #define SUDMAC_RX_END_MODE	BIT(1)
47 
48 /* Definitions for the sudmac_channel.dint_end_bit */
49 #define SUDMAC_DMA_BIT_CH0	BIT(0)
50 #define SUDMAC_DMA_BIT_CH1	BIT(1)
51 
52 #endif
53