1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * MUSB OTG driver register I/O
4 *
5 * Copyright 2005 Mentor Graphics Corporation
6 * Copyright (C) 2005-2006 by Texas Instruments
7 * Copyright (C) 2006-2007 Nokia Corporation
8 *
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * version 2 as published by the Free Software Foundation.
12 */
13
14#ifndef __MUSB_LINUX_PLATFORM_ARCH_H__
15#define __MUSB_LINUX_PLATFORM_ARCH_H__
16
17#include <linux/io.h>
18
19/* NOTE:  these offsets are all in bytes */
20
21static inline u16 musb_readw(const void __iomem *addr, unsigned offset)
22	{ return __raw_readw(addr + offset); }
23
24static inline u32 musb_readl(const void __iomem *addr, unsigned offset)
25	{ return __raw_readl(addr + offset); }
26
27
28static inline void musb_writew(void __iomem *addr, unsigned offset, u16 data)
29	{ __raw_writew(data, addr + offset); }
30
31static inline void musb_writel(void __iomem *addr, unsigned offset, u32 data)
32	{ __raw_writel(data, addr + offset); }
33
34
35#if defined(CONFIG_USB_MUSB_TUSB6010) || defined (CONFIG_USB_MUSB_TUSB6010_MODULE)
36
37/*
38 * TUSB6010 doesn't allow 8-bit access; 16-bit access is the minimum.
39 */
40static inline u8 musb_readb(const void __iomem *addr, unsigned offset)
41{
42	u16 tmp;
43	u8 val;
44
45	tmp = __raw_readw(addr + (offset & ~1));
46	if (offset & 1)
47		val = (tmp >> 8);
48	else
49		val = tmp & 0xff;
50
51	return val;
52}
53
54static inline void musb_writeb(void __iomem *addr, unsigned offset, u8 data)
55{
56	u16 tmp;
57
58	tmp = __raw_readw(addr + (offset & ~1));
59	if (offset & 1)
60		tmp = (data << 8) | (tmp & 0xff);
61	else
62		tmp = (tmp & 0xff00) | data;
63
64	__raw_writew(tmp, addr + (offset & ~1));
65}
66
67#else
68
69static inline u8 musb_readb(const void __iomem *addr, unsigned offset)
70	{ return __raw_readb(addr + offset); }
71
72static inline void musb_writeb(void __iomem *addr, unsigned offset, u8 data)
73	{ __raw_writeb(data, addr + offset); }
74
75#endif	/* CONFIG_USB_MUSB_TUSB6010 */
76
77#endif
78