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

   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
  27static 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
  50static 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