/* SPDX-License-Identifier: GPL-2.0 */
/*
 * io.h - DesignWare USB3 DRD IO Header
 *
 * Copyright (C) 2010-2011 Texas Instruments Incorporated - https://www.ti.com
 *
 * Authors: Felipe Balbi <balbi@ti.com>,
 *          Sebastian Andrzej Siewior <bigeasy@linutronix.de>
 */

#ifndef __DRIVERS_USB_DWC3_IO_H
#define __DRIVERS_USB_DWC3_IO_H

#include <linux/io.h>
#include "trace.h"
#include "debug.h"
#include "core.h"

static inline u32 dwc3_readl(struct dwc3 *dwc, u32 offset)
{
        u32 value;
        void __iomem *base = dwc->regs;

        /*
         * We requested the mem region starting from the Globals address
         * space, see dwc3_probe in core.c.
         * However, the offsets are given starting from xHCI address space.
         */
        value = readl(base + offset - DWC3_GLOBALS_REGS_START);

        /*
         * When tracing we want to make it easy to find the correct address on
         * documentation, so we revert it back to the proper addresses, the
         * same way they are described on SNPS documentation
         */
        trace_dwc3_readl(dwc, base - DWC3_GLOBALS_REGS_START, offset, value);

        return value;
}

static inline void dwc3_writel(struct dwc3 *dwc, u32 offset, u32 value)
{
        void __iomem *base = dwc->regs;

        /*
         * We requested the mem region starting from the Globals address
         * space, see dwc3_probe in core.c.
         * However, the offsets are given starting from xHCI address space.
         */
        writel(value, base + offset - DWC3_GLOBALS_REGS_START);

        /*
         * When tracing we want to make it easy to find the correct address on
         * documentation, so we revert it back to the proper addresses, the
         * same way they are described on SNPS documentation
         */
        trace_dwc3_writel(dwc, base - DWC3_GLOBALS_REGS_START, offset, value);
}

#endif /* __DRIVERS_USB_DWC3_IO_H */