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 #if !defined(CONFIG_ARM) && !defined(CONFIG_SUPERH) \
  41         && !defined(CONFIG_AVR32) && !defined(CONFIG_PPC32) \
  42         && !defined(CONFIG_PPC64) && !defined(CONFIG_BLACKFIN)
  43 static inline void readsl(const void __iomem *addr, void *buf, int len)
  44         { insl((unsigned long)addr, buf, len); }
  45 static inline void readsw(const void __iomem *addr, void *buf, int len)
  46         { insw((unsigned long)addr, buf, len); }
  47 static inline void readsb(const void __iomem *addr, void *buf, int len)
  48         { insb((unsigned long)addr, buf, len); }
  49
  50 static inline void writesl(const void __iomem *addr, const void *buf, int len)
  51         { outsl((unsigned long)addr, buf, len); }
  52 static inline void writesw(const void __iomem *addr, const void *buf, int len)
  53         { outsw((unsigned long)addr, buf, len); }
  54 static inline void writesb(const void __iomem *addr, const void *buf, int len)
  55         { outsb((unsigned long)addr, buf, len); }
  56
  57 #endif
  58
  59 #if !defined(CONFIG_BLACKFIN) && !defined(CONFIG_MACH_OMAP3517EVM)
  60
  61 /* NOTE:  these offsets are all in bytes */
  62
  63 static inline u16 musb_readw(const void __iomem *addr, unsigned offset)
  64         { return __raw_readw(addr + offset); }
  65
  66 static inline u32 musb_readl(const void __iomem *addr, unsigned offset)
  67         { return __raw_readl(addr + offset); }
  68
  69
  70 static inline void musb_writew(void __iomem *addr, unsigned offset, u16 data)
  71         { __raw_writew(data, addr + offset); }
  72
  73 static inline void musb_writel(void __iomem *addr, unsigned offset, u32 data)
  74         { __raw_writel(data, addr + offset); }
  75
  76
  77 #ifdef CONFIG_USB_TUSB6010
  78
  79 /*
  80  * TUSB6010 doesn't allow 8-bit access; 16-bit access is the minimum.
  81  */
  82 static inline u8 musb_readb(const void __iomem *addr, unsigned offset)
  83 {
  84         u16 tmp;
  85         u8 val;
  86
  87         tmp = __raw_readw(addr + (offset & ~1));
  88         if (offset & 1)
  89                 val = (tmp >> 8);
  90         else
  91                 val = tmp & 0xff;
  92
  93         return val;
  94 }
  95
  96 static inline void musb_writeb(void __iomem *addr, unsigned offset, u8 data)
  97 {
  98         u16 tmp;
  99
 100         tmp = __raw_readw(addr + (offset & ~1));
 101         if (offset & 1)
 102                 tmp = (data << 8) | (tmp & 0xff);
 103         else
 104                 tmp = (tmp & 0xff00) | data;
 105
 106         __raw_writew(tmp, addr + (offset & ~1));
 107 }
 108
 109 #else
 110
 111 static inline u8 musb_readb(const void __iomem *addr, unsigned offset)
 112         { return __raw_readb(addr + offset); }
 113
 114 static inline void musb_writeb(void __iomem *addr, unsigned offset, u8 data)
 115         { __raw_writeb(data, addr + offset); }
 116
 117 #endif  /* CONFIG_USB_TUSB6010 */
 118
 119 #elif defined(CONFIG_BLACKFIN)
 120
 121 static inline u8 musb_readb(const void __iomem *addr, unsigned offset)
 122         { return (u8) (bfin_read16(addr + offset)); }
 123
 124 static inline u16 musb_readw(const void __iomem *addr, unsigned offset)
 125         { return bfin_read16(addr + offset); }
 126
 127 static inline u32 musb_readl(const void __iomem *addr, unsigned offset)
 128         { return (u32) (bfin_read16(addr + offset)); }
 129
 130 static inline void musb_writeb(void __iomem *addr, unsigned offset, u8 data)
 131         { bfin_write16(addr + offset, (u16) data); }
 132
 133 static inline void musb_writew(void __iomem *addr, unsigned offset, u16 data)
 134         { bfin_write16(addr + offset, data); }
 135
 136 static inline void musb_writel(void __iomem *addr, unsigned offset, u32 data)
 137         { bfin_write16(addr + offset, (u16) data); }
 138
 139 #elif defined(CONFIG_MACH_OMAP3517EVM)
 140
 141 /* AM3517 has a limitation on read operation. Only 32 bit read is
 142  * allowed and thus 8bit and 16bit read has to be handled differently
 143  * using 32bit read only.
 144  * We also need to workaround of scenario where reading an 8bit
 145  * register would accidently clear the interrupt register causing
 146  * an interrupt event miss.
 147  */
 148 extern u16 musb_readw(const void __iomem *addr, unsigned offset);
 149 extern void musb_writew(void __iomem *addr, unsigned offset, u16 data);
 150 extern u8 musb_readb(const void __iomem *addr, unsigned offset);
 151 extern void musb_writeb(void __iomem *addr, unsigned offset, u8 data);
 152
 153 static inline u32 musb_readl(const void __iomem *addr, unsigned offset)
 154         { return __raw_readl(addr + offset); }
 155
 156 static inline void musb_writel(void __iomem *addr, unsigned offset, u32 data)
 157         { __raw_writel(data, addr + offset); }
 158
 159 #endif /* CONFIG_BLACKFIN || CONFIG_MACH_OMAP3517EVM */
 160
 161 #endif