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 dwc3_trace(trace_dwc3_readl, "addr %p value %08x", 44 base - DWC3_GLOBALS_REGS_START + offset, value); 45 46 return value; 47 } 48 49 static inline void dwc3_writel(void __iomem *base, u32 offset, u32 value) 50 { 51 /* 52 * We requested the mem region starting from the Globals address 53 * space, see dwc3_probe in core.c. 54 * However, the offsets are given starting from xHCI address space. 55 */ 56 writel(value, base + offset - DWC3_GLOBALS_REGS_START); 57 58 /* 59 * When tracing we want to make it easy to find the correct address on 60 * documentation, so we revert it back to the proper addresses, the 61 * same way they are described on SNPS documentation 62 */ 63 dwc3_trace(trace_dwc3_writel, "addr %p value %08x", 64 base - DWC3_GLOBALS_REGS_START + offset, value); 65 } 66 67 #endif /* __DRIVERS_USB_DWC3_IO_H */ 68