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(addr: 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: 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(val: value, addr: 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: base - DWC3_GLOBALS_REGS_START, offset, value);
55}
56
57#endif /* __DRIVERS_USB_DWC3_IO_H */
58

source code of linux/drivers/usb/dwc3/io.h