1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * MUSB OTG driver - support for Mentor's DMA controller
 4 *
 5 * Copyright 2005 Mentor Graphics Corporation
 6 * Copyright (C) 2005-2007 by Texas Instruments
 7 */
 8
 9#define MUSB_HSDMA_BASE		0x200
10#define MUSB_HSDMA_INTR		(MUSB_HSDMA_BASE + 0)
11#define MUSB_HSDMA_CONTROL		0x4
12#define MUSB_HSDMA_ADDRESS		0x8
13#define MUSB_HSDMA_COUNT		0xc
14
15#define MUSB_HSDMA_CHANNEL_OFFSET(_bchannel, _offset)		\
16		(MUSB_HSDMA_BASE + (_bchannel << 4) + _offset)
17
18#define musb_read_hsdma_addr(mbase, bchannel)	\
19	musb_readl(mbase,	\
20		   MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_ADDRESS))
21
22#define musb_write_hsdma_addr(mbase, bchannel, addr) \
23	musb_writel(mbase, \
24		    MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_ADDRESS), \
25		    addr)
26
27#define musb_read_hsdma_count(mbase, bchannel)	\
28	musb_readl(mbase,	\
29		   MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_COUNT))
30
31#define musb_write_hsdma_count(mbase, bchannel, len) \
32	musb_writel(mbase, \
33		    MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_COUNT), \
34		    len)
35/* control register (16-bit): */
36#define MUSB_HSDMA_ENABLE_SHIFT		0
37#define MUSB_HSDMA_TRANSMIT_SHIFT	1
38#define MUSB_HSDMA_MODE1_SHIFT		2
39#define MUSB_HSDMA_IRQENABLE_SHIFT	3
40#define MUSB_HSDMA_ENDPOINT_SHIFT	4
41#define MUSB_HSDMA_BUSERROR_SHIFT	8
42#define MUSB_HSDMA_BURSTMODE_SHIFT	9
43#define MUSB_HSDMA_BURSTMODE		(3 << MUSB_HSDMA_BURSTMODE_SHIFT)
44#define MUSB_HSDMA_BURSTMODE_UNSPEC	0
45#define MUSB_HSDMA_BURSTMODE_INCR4	1
46#define MUSB_HSDMA_BURSTMODE_INCR8	2
47#define MUSB_HSDMA_BURSTMODE_INCR16	3
48
49#define MUSB_HSDMA_CHANNELS		8
50
51struct musb_dma_controller;
52
53struct musb_dma_channel {
54	struct dma_channel		channel;
55	struct musb_dma_controller	*controller;
56	u32				start_addr;
57	u32				len;
58	u16				max_packet_sz;
59	u8				idx;
60	u8				epnum;
61	u8				transmit;
62};
63
64struct musb_dma_controller {
65	struct dma_controller		controller;
66	struct musb_dma_channel		channel[MUSB_HSDMA_CHANNELS];
67	void				*private_data;
68	void __iomem			*base;
69	u8				channel_count;
70	u8				used_channels;
71	int				irq;
72};