drivers/usb/musb/musb_io.h

   1 /*
   2  * MUSB OTG driver register I/O
   3  *
   4  * Copyright 2005 Mentor Graphics Corporation
   5  * Copyright (C) 2005-2006 by Texas Instruments
   6  * Copyright (C) 2006-2007 Nokia Corporation
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License
  10  * version 2 as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  20  * 02110-1301 USA
  21  *
  22  * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
  23  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  24  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  25  * NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  26  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  27  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
  28  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  29  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  31  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  *
  33  */
  34
  35 #ifndef __MUSB_LINUX_PLATFORM_ARCH_H__
  36 #define __MUSB_LINUX_PLATFORM_ARCH_H__
  37
  38 #include <linux/io.h>
  39
  40 #ifndef CONFIG_ARM
  41 static inline void readsl(const void __iomem *addr, void *buf, int len)
  42         { insl((unsigned long)addr, buf, len); }
  43 static inline void readsw(const void __iomem *addr, void *buf, int len)
  44         { insw((unsigned long)addr, buf, len); }
  45 static inline void readsb(const void __iomem *addr, void *buf, int len)
  46         { insb((unsigned long)addr, buf, len); }
  47
  48 static inline void writesl(const void __iomem *addr, const void *buf, int len)
  49         { outsl((unsigned long)addr, buf, len); }
  50 static inline void writesw(const void __iomem *addr, const void *buf, int len)
  51         { outsw((unsigned long)addr, buf, len); }
  52 static inline void writesb(const void __iomem *addr, const void *buf, int len)
  53         { outsb((unsigned long)addr, buf, len); }
  54
  55 #endif
  56
  57 /* NOTE:  these offsets are all in bytes */
  58
  59 static inline u16 musb_readw(const void __iomem *addr, unsigned offset)
  60         { return __raw_readw(addr + offset); }
  61
  62 static inline u32 musb_readl(const void __iomem *addr, unsigned offset)
  63         { return __raw_readl(addr + offset); }
  64
  65
  66 static inline void musb_writew(void __iomem *addr, unsigned offset, u16 data)
  67         { __raw_writew(data, addr + offset); }
  68
  69 static inline void musb_writel(void __iomem *addr, unsigned offset, u32 data)
  70         { __raw_writel(data, addr + offset); }
  71
  72
  73 #ifdef CONFIG_USB_TUSB6010
  74
  75 /*
  76  * TUSB6010 doesn't allow 8-bit access; 16-bit access is the minimum.
  77  */
  78 static inline u8 musb_readb(const void __iomem *addr, unsigned offset)
  79 {
  80         u16 tmp;
  81         u8 val;
  82
  83         tmp = __raw_readw(addr + (offset & ~1));
  84         if (offset & 1)
  85                 val = (tmp >> 8);
  86         else
  87                 val = tmp & 0xff;
  88
  89         return val;
  90 }
  91
  92 static inline void musb_writeb(void __iomem *addr, unsigned offset, u8 data)
  93 {
  94         u16 tmp;
  95
  96         tmp = __raw_readw(addr + (offset & ~1));
  97         if (offset & 1)
  98                 tmp = (data << 8) | (tmp & 0xff);
  99         else
 100                 tmp = (tmp & 0xff00) | data;
 101
 102         __raw_writew(tmp, addr + (offset & ~1));
 103 }
 104
 105 #else
 106
 107 static inline u8 musb_readb(const void __iomem *addr, unsigned offset)
 108         { return __raw_readb(addr + offset); }
 109
 110 static inline void musb_writeb(void __iomem *addr, unsigned offset, u8 data)
 111         { __raw_writeb(data, addr + offset); }
 112
 113 #endif  /* CONFIG_USB_TUSB6010 */
 114
 115 #endif