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 offs = offset - DWC3_GLOBALS_REGS_START; 30 u32 value; 31 32 /* 33 * We requested the mem region starting from the Globals address 34 * space, see dwc3_probe in core.c. 35 * However, the offsets are given starting from xHCI address space. 36 */ 37 value = readl(base + offs); 38 39 /* 40 * When tracing we want to make it easy to find the correct address on 41 * documentation, so we revert it back to the proper addresses, the 42 * same way they are described on SNPS documentation 43 */ 44 dwc3_trace(trace_dwc3_readl, "addr %p value %08x", 45 base - DWC3_GLOBALS_REGS_START + offset, value); 46 47 return value; 48 } 49 50 static inline void dwc3_writel(void __iomem *base, u32 offset, u32 value) 51 { 52 u32 offs = offset - DWC3_GLOBALS_REGS_START; 53 54 /* 55 * We requested the mem region starting from the Globals address 56 * space, see dwc3_probe in core.c. 57 * However, the offsets are given starting from xHCI address space. 58 */ 59 writel(value, base + offs); 60 61 /* 62 * When tracing we want to make it easy to find the correct address on 63 * documentation, so we revert it back to the proper addresses, the 64 * same way they are described on SNPS documentation 65 */ 66 dwc3_trace(trace_dwc3_writel, "addr %p value %08x", 67 base - DWC3_GLOBALS_REGS_START + offset, value); 68 } 69 70 #endif /* __DRIVERS_USB_DWC3_IO_H */ 71