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(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 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