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(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 - 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(value, 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 - DWC3_GLOBALS_REGS_START, offset, value); 55 } 56 57 #endif /* __DRIVERS_USB_DWC3_IO_H */ 58