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  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions, and the following disclaimer,
  14  *    without modification.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. The names of the above-listed copyright holders may not be used
  19  *    to endorse or promote products derived from this software without
  20  *    specific prior written permission.
  21  *
  22  * ALTERNATIVELY, this software may be distributed under the terms of the
  23  * GNU General Public License ("GPL") version 2, as published by the Free
  24  * Software Foundation.
  25  *
  26  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
  27  * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  28  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  29  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  30  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  31  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  32  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  33  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  34  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  35  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  36  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  37  */
  38
  39 #ifndef __DRIVERS_USB_DWC3_IO_H
  40 #define __DRIVERS_USB_DWC3_IO_H
  41
  42 #include <linux/io.h>
  43
  44 #include "core.h"
  45
  46 static inline u32 dwc3_readl(void __iomem *base, u32 offset)
  47 {
  48         /*
  49          * We requested the mem region starting from the Globals address
  50          * space, see dwc3_probe in core.c.
  51          * However, the offsets are given starting from xHCI address space.
  52          */
  53         return readl(base + (offset - DWC3_GLOBALS_REGS_START));
  54 }
  55
  56 static inline void dwc3_writel(void __iomem *base, u32 offset, u32 value)
  57 {
  58         /*
  59          * We requested the mem region starting from the Globals address
  60          * space, see dwc3_probe in core.c.
  61          * However, the offsets are given starting from xHCI address space.
  62          */
  63         writel(value, base + (offset - DWC3_GLOBALS_REGS_START));
  64 }
  65
  66 #endif /* __DRIVERS_USB_DWC3_IO_H */