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