arch/sh/boards/mach-snapgear/io.c

   1 /*
   2  * Copyright (C) 2002  David McCullough <davidm@snapgear.com>
   3  * Copyright (C) 2001  Ian da Silva, Jeremy Siegel
   4  * Based largely on io_se.c.
   5  *
   6  * I/O routine for Hitachi 7751 SolutionEngine.
   7  *
   8  * Initial version only to support LAN access; some
   9  * placeholder code from io_se.c left in with the
  10  * expectation of later SuperIO and PCMCIA access.
  11  */
  12 #include <linux/kernel.h>
  13 #include <linux/types.h>
  14 #include <linux/pci.h>
  15 #include <asm/io.h>
  16 #include <asm/addrspace.h>
  17
  18 #ifdef CONFIG_SH_SECUREEDGE5410
  19 unsigned short secureedge5410_ioport;
  20 #endif
  21
  22 static inline volatile __u16 *port2adr(unsigned int port)
  23 {
  24         maybebadio((unsigned long)port);
  25         return (volatile __u16*)port;
  26 }
  27
  28 /*
  29  * General outline: remap really low stuff [eventually] to SuperIO,
  30  * stuff in PCI IO space (at or above window at pci.h:PCIBIOS_MIN_IO)
  31  * is mapped through the PCI IO window.  Stuff with high bits (PXSEG)
  32  * should be way beyond the window, and is used  w/o translation for
  33  * compatibility.
  34  */
  35 unsigned char snapgear_inb(unsigned long port)
  36 {
  37         if (PXSEG(port))
  38                 return *(volatile unsigned char *)port;
  39         else
  40                 return (*port2adr(port)) & 0xff;
  41 }
  42
  43 unsigned char snapgear_inb_p(unsigned long port)
  44 {
  45         unsigned char v;
  46
  47         if (PXSEG(port))
  48                 v = *(volatile unsigned char *)port;
  49         else
  50                 v = (*port2adr(port))&0xff;
  51         ctrl_delay();
  52         return v;
  53 }
  54
  55 unsigned short snapgear_inw(unsigned long port)
  56 {
  57         if (PXSEG(port))
  58                 return *(volatile unsigned short *)port;
  59         else if (port >= 0x2000)
  60                 return *port2adr(port);
  61         else
  62                 maybebadio(port);
  63         return 0;
  64 }
  65
  66 unsigned int snapgear_inl(unsigned long port)
  67 {
  68         if (PXSEG(port))
  69                 return *(volatile unsigned long *)port;
  70         else if (port >= 0x2000)
  71                 return *port2adr(port);
  72         else
  73                 maybebadio(port);
  74         return 0;
  75 }
  76
  77 void snapgear_outb(unsigned char value, unsigned long port)
  78 {
  79
  80         if (PXSEG(port))
  81                 *(volatile unsigned char *)port = value;
  82         else
  83                 *(port2adr(port)) = value;
  84 }
  85
  86 void snapgear_outb_p(unsigned char value, unsigned long port)
  87 {
  88         if (PXSEG(port))
  89                 *(volatile unsigned char *)port = value;
  90         else
  91                 *(port2adr(port)) = value;
  92         ctrl_delay();
  93 }
  94
  95 void snapgear_outw(unsigned short value, unsigned long port)
  96 {
  97         if (PXSEG(port))
  98                 *(volatile unsigned short *)port = value;
  99         else if (port >= 0x2000)
 100                 *port2adr(port) = value;
 101         else
 102                 maybebadio(port);
 103 }
 104
 105 void snapgear_outl(unsigned int value, unsigned long port)
 106 {
 107         if (PXSEG(port))
 108                 *(volatile unsigned long *)port = value;
 109         else
 110                 maybebadio(port);
 111 }
 112
 113 void snapgear_insl(unsigned long port, void *addr, unsigned long count)
 114 {
 115         maybebadio(port);
 116 }
 117
 118 void snapgear_outsl(unsigned long port, const void *addr, unsigned long count)
 119 {
 120         maybebadio(port);
 121 }