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Linux kernel mirror (for testing)
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1/**
2 * io.h - DesignWare USB3 DRD IO Header
3 *
4 * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com
5 *
6 * Authors: Felipe Balbi <balbi@ti.com>,
7 * Sebastian Andrzej Siewior <bigeasy@linutronix.de>
8 *
9 * This program is free software: you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 of
11 * the License as published by the Free Software Foundation.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 */
18
19#ifndef __DRIVERS_USB_DWC3_IO_H
20#define __DRIVERS_USB_DWC3_IO_H
21
22#include <linux/io.h>
23#include "trace.h"
24#include "debug.h"
25#include "core.h"
26
27static inline u32 dwc3_readl(void __iomem *base, u32 offset)
28{
29 u32 value;
30
31 /*
32 * We requested the mem region starting from the Globals address
33 * space, see dwc3_probe in core.c.
34 * However, the offsets are given starting from xHCI address space.
35 */
36 value = readl(base + offset - DWC3_GLOBALS_REGS_START);
37
38 /*
39 * When tracing we want to make it easy to find the correct address on
40 * documentation, so we revert it back to the proper addresses, the
41 * same way they are described on SNPS documentation
42 */
43 trace_dwc3_readl(base - DWC3_GLOBALS_REGS_START, offset, value);
44
45 return value;
46}
47
48static inline void dwc3_writel(void __iomem *base, u32 offset, u32 value)
49{
50 /*
51 * We requested the mem region starting from the Globals address
52 * space, see dwc3_probe in core.c.
53 * However, the offsets are given starting from xHCI address space.
54 */
55 writel(value, base + offset - DWC3_GLOBALS_REGS_START);
56
57 /*
58 * When tracing we want to make it easy to find the correct address on
59 * documentation, so we revert it back to the proper addresses, the
60 * same way they are described on SNPS documentation
61 */
62 trace_dwc3_writel(base - DWC3_GLOBALS_REGS_START, offset, value);
63}
64
65#endif /* __DRIVERS_USB_DWC3_IO_H */