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_BLACKFIN
  41
  42 /* NOTE:  these offsets are all in bytes */
  43
  44 static inline u16 musb_readw(const void __iomem *addr, unsigned offset)
  45         { return __raw_readw(addr + offset); }
  46
  47 static inline u32 musb_readl(const void __iomem *addr, unsigned offset)
  48         { return __raw_readl(addr + offset); }
  49
  50
  51 static inline void musb_writew(void __iomem *addr, unsigned offset, u16 data)
  52         { __raw_writew(data, addr + offset); }
  53
  54 static inline void musb_writel(void __iomem *addr, unsigned offset, u32 data)
  55         { __raw_writel(data, addr + offset); }
  56
  57
  58 #if defined(CONFIG_USB_MUSB_TUSB6010) || defined (CONFIG_USB_MUSB_TUSB6010_MODULE)
  59
  60 /*
  61  * TUSB6010 doesn't allow 8-bit access; 16-bit access is the minimum.
  62  */
  63 static inline u8 musb_readb(const void __iomem *addr, unsigned offset)
  64 {
  65         u16 tmp;
  66         u8 val;
  67
  68         tmp = __raw_readw(addr + (offset & ~1));
  69         if (offset & 1)
  70                 val = (tmp >> 8);
  71         else
  72                 val = tmp & 0xff;
  73
  74         return val;
  75 }
  76
  77 static inline void musb_writeb(void __iomem *addr, unsigned offset, u8 data)
  78 {
  79         u16 tmp;
  80
  81         tmp = __raw_readw(addr + (offset & ~1));
  82         if (offset & 1)
  83                 tmp = (data << 8) | (tmp & 0xff);
  84         else
  85                 tmp = (tmp & 0xff00) | data;
  86
  87         __raw_writew(tmp, addr + (offset & ~1));
  88 }
  89
  90 #else
  91
  92 static inline u8 musb_readb(const void __iomem *addr, unsigned offset)
  93         { return __raw_readb(addr + offset); }
  94
  95 static inline void musb_writeb(void __iomem *addr, unsigned offset, u8 data)
  96         { __raw_writeb(data, addr + offset); }
  97
  98 #endif  /* CONFIG_USB_MUSB_TUSB6010 */
  99
 100 #else
 101
 102 static inline u8 musb_readb(const void __iomem *addr, unsigned offset)
 103         { return (u8) (bfin_read16(addr + offset)); }
 104
 105 static inline u16 musb_readw(const void __iomem *addr, unsigned offset)
 106         { return bfin_read16(addr + offset); }
 107
 108 static inline u32 musb_readl(const void __iomem *addr, unsigned offset)
 109         { return (u32) (bfin_read16(addr + offset)); }
 110
 111 static inline void musb_writeb(void __iomem *addr, unsigned offset, u8 data)
 112         { bfin_write16(addr + offset, (u16) data); }
 113
 114 static inline void musb_writew(void __iomem *addr, unsigned offset, u16 data)
 115         { bfin_write16(addr + offset, data); }
 116
 117 static inline void musb_writel(void __iomem *addr, unsigned offset, u32 data)
 118         { bfin_write16(addr + offset, (u16) data); }
 119
 120 #endif /* CONFIG_BLACKFIN */
 121
 122 #endif