LXR linux/drivers/usb/dwc3/io.h

   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
  19static 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
  40static 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