/* SPDX-License-Identifier: GPL-2.0 */
/*
 * MUSB OTG driver register I/O
 *
 * Copyright 2005 Mentor Graphics Corporation
 * Copyright (C) 2005-2006 by Texas Instruments
 * Copyright (C) 2006-2007 Nokia Corporation
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 */

#ifndef __MUSB_LINUX_PLATFORM_ARCH_H__
#define __MUSB_LINUX_PLATFORM_ARCH_H__

#include <linux/io.h>

/* NOTE:  these offsets are all in bytes */

static inline u16 musb_readw(const void __iomem *addr, unsigned offset)
	{ return __raw_readw(addr + offset); }

static inline u32 musb_readl(const void __iomem *addr, unsigned offset)
	{ return __raw_readl(addr + offset); }

static inline void musb_writew(void __iomem *addr, unsigned offset, u16 data)
	{ __raw_writew(data, addr + offset); }

static inline void musb_writel(void __iomem *addr, unsigned offset, u32 data)
	{ __raw_writel(data, addr + offset); }

#if defined(CONFIG_USB_MUSB_TUSB6010) || defined (CONFIG_USB_MUSB_TUSB6010_MODULE)

/*
 * TUSB6010 doesn't allow 8-bit access; 16-bit access is the minimum.
 */
static inline u8 musb_readb(const void __iomem *addr, unsigned offset)
{
	u16 tmp;
	u8 val;

	tmp = __raw_readw(addr + (offset & ~1));
	if (offset & 1)
		val = (tmp >> 8);
	else
		val = tmp & 0xff;

	return val;
}

static inline void musb_writeb(void __iomem *addr, unsigned offset, u8 data)
{
	u16 tmp;

	tmp = __raw_readw(addr + (offset & ~1));
	if (offset & 1)
		tmp = (data << 8) | (tmp & 0xff);
	else
		tmp = (tmp & 0xff00) | data;

	__raw_writew(tmp, addr + (offset & ~1));
}

#else

static inline u8 musb_readb(const void __iomem *addr, unsigned offset)
	{ return __raw_readb(addr + offset); }

static inline void musb_writeb(void __iomem *addr, unsigned offset, u8 data)
	{ __raw_writeb(data, addr + offset); }

#endif	/* CONFIG_USB_MUSB_TUSB6010 */

#endif