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 | |
19 | static 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 | |
40 | static 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 | |