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
dwc3_readl(struct dwc3 * dwc,u32 offset)19 static inline u32 dwc3_readl(struct dwc3 *dwc, u32 offset)
20 {
21 u32 value;
22 void __iomem *base = dwc->regs;
23
24 /*
25 * We requested the mem region starting from the Globals address
26 * space, see dwc3_probe in core.c.
27 * However, the offsets are given starting from xHCI address space.
28 */
29 value = readl(base + offset - DWC3_GLOBALS_REGS_START);
30
31 /*
32 * When tracing we want to make it easy to find the correct address on
33 * documentation, so we revert it back to the proper addresses, the
34 * same way they are described on SNPS documentation
35 */
36 trace_dwc3_readl(dwc, base - DWC3_GLOBALS_REGS_START, offset, value);
37
38 return value;
39 }
40
dwc3_writel(struct dwc3 * dwc,u32 offset,u32 value)41 static inline void dwc3_writel(struct dwc3 *dwc, u32 offset, u32 value)
42 {
43 void __iomem *base = dwc->regs;
44
45 /*
46 * We requested the mem region starting from the Globals address
47 * space, see dwc3_probe in core.c.
48 * However, the offsets are given starting from xHCI address space.
49 */
50 writel(value, base + offset - DWC3_GLOBALS_REGS_START);
51
52 /*
53 * When tracing we want to make it easy to find the correct address on
54 * documentation, so we revert it back to the proper addresses, the
55 * same way they are described on SNPS documentation
56 */
57 trace_dwc3_writel(dwc, base - DWC3_GLOBALS_REGS_START, offset, value);
58 }
59
60 #endif /* __DRIVERS_USB_DWC3_IO_H */
61