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Kishon Vijay Abraham I85d5e702015-02-23 18:39:50 +05301/**
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 offs = offset - DWC3_GLOBALS_REGS_START;
30 u32 value;
31
32 /*
33 * We requested the mem region starting from the Globals address
34 * space, see dwc3_probe in core.c.
35 * However, the offsets are given starting from xHCI address space.
36 */
37 value = readl(base + offs);
38
39 /*
40 * When tracing we want to make it easy to find the correct address on
41 * documentation, so we revert it back to the proper addresses, the
42 * same way they are described on SNPS documentation
43 */
44 dwc3_trace(trace_dwc3_readl, "addr %p value %08x",
45 base - DWC3_GLOBALS_REGS_START + offset, value);
46
47 return value;
48}
49
50static inline void dwc3_writel(void __iomem *base, u32 offset, u32 value)
51{
52 u32 offs = offset - DWC3_GLOBALS_REGS_START;
53
54 /*
55 * We requested the mem region starting from the Globals address
56 * space, see dwc3_probe in core.c.
57 * However, the offsets are given starting from xHCI address space.
58 */
59 writel(value, base + offs);
60
61 /*
62 * When tracing we want to make it easy to find the correct address on
63 * documentation, so we revert it back to the proper addresses, the
64 * same way they are described on SNPS documentation
65 */
66 dwc3_trace(trace_dwc3_writel, "addr %p value %08x",
67 base - DWC3_GLOBALS_REGS_START + offset, value);
68}
69
70#endif /* __DRIVERS_USB_DWC3_IO_H */