1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * io.h - DesignWare USB3 DRD IO Header
4 *
5 * Copyright (C) 2010-2011 Texas Instruments Incorporated - https://www.ti.com
6 *
7 * Authors: Felipe Balbi <balbi@ti.com>,
8 *	    Sebastian Andrzej Siewior <bigeasy@linutronix.de>
9 */
10
11#ifndef __DRIVERS_USB_DWC3_IO_H
12#define __DRIVERS_USB_DWC3_IO_H
13
14#include <linux/io.h>
15#include "trace.h"
16#include "debug.h"
17#include "core.h"
18
19static inline u32 dwc3_readl(void __iomem *base, u32 offset)
20{
21	u32 value;
22
23	/*
24	 * We requested the mem region starting from the Globals address
25	 * space, see dwc3_probe in core.c.
26	 * However, the offsets are given starting from xHCI address space.
27	 */
28	value = readl(base + offset - DWC3_GLOBALS_REGS_START);
29
30	/*
31	 * When tracing we want to make it easy to find the correct address on
32	 * documentation, so we revert it back to the proper addresses, the
33	 * same way they are described on SNPS documentation
34	 */
35	trace_dwc3_readl(base - DWC3_GLOBALS_REGS_START, offset, value);
36
37	return value;
38}
39
40static inline void dwc3_writel(void __iomem *base, u32 offset, u32 value)
41{
42	/*
43	 * We requested the mem region starting from the Globals address
44	 * space, see dwc3_probe in core.c.
45	 * However, the offsets are given starting from xHCI address space.
46	 */
47	writel(value, base + offset - DWC3_GLOBALS_REGS_START);
48
49	/*
50	 * When tracing we want to make it easy to find the correct address on
51	 * documentation, so we revert it back to the proper addresses, the
52	 * same way they are described on SNPS documentation
53	 */
54	trace_dwc3_writel(base - DWC3_GLOBALS_REGS_START, offset, value);
55}
56
57#endif /* __DRIVERS_USB_DWC3_IO_H */
58