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
dwc3_readl(void __iomem * base,u32 offset)27 static 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 dwc3_trace(trace_dwc3_readl, "addr %p value %08x",
44 base - DWC3_GLOBALS_REGS_START + offset, value);
45
46 return value;
47 }
48
dwc3_writel(void __iomem * base,u32 offset,u32 value)49 static inline void dwc3_writel(void __iomem *base, u32 offset, u32 value)
50 {
51 /*
52 * We requested the mem region starting from the Globals address
53 * space, see dwc3_probe in core.c.
54 * However, the offsets are given starting from xHCI address space.
55 */
56 writel(value, base + offset - DWC3_GLOBALS_REGS_START);
57
58 /*
59 * When tracing we want to make it easy to find the correct address on
60 * documentation, so we revert it back to the proper addresses, the
61 * same way they are described on SNPS documentation
62 */
63 dwc3_trace(trace_dwc3_writel, "addr %p value %08x",
64 base - DWC3_GLOBALS_REGS_START + offset, value);
65 }
66
67 #endif /* __DRIVERS_USB_DWC3_IO_H */
68