arch/sh/boards/mach-se/7751/io.c

   1 /*
   2  * Copyright (C) 2001  Ian da Silva, Jeremy Siegel
   3  * Based largely on io_se.c.
   4  *
   5  * I/O routine for Hitachi 7751 SolutionEngine.
   6  *
   7  * Initial version only to support LAN access; some
   8  * placeholder code from io_se.c left in with the
   9  * expectation of later SuperIO and PCMCIA access.
  10  */
  11 #include <linux/kernel.h>
  12 #include <linux/types.h>
  13 #include <linux/pci.h>
  14 #include <asm/io.h>
  15 #include <mach-se/mach/se7751.h>
  16 #include <asm/addrspace.h>
  17
  18 static inline volatile u16 *port2adr(unsigned int port)
  19 {
  20         if (port >= 0x2000)
  21                 return (volatile __u16 *) (PA_MRSHPC + (port - 0x2000));
  22         maybebadio((unsigned long)port);
  23         return (volatile __u16*)port;
  24 }
  25
  26 /*
  27  * General outline: remap really low stuff [eventually] to SuperIO,
  28  * stuff in PCI IO space (at or above window at pci.h:PCIBIOS_MIN_IO)
  29  * is mapped through the PCI IO window.  Stuff with high bits (PXSEG)
  30  * should be way beyond the window, and is used  w/o translation for
  31  * compatibility.
  32  */
  33 unsigned char sh7751se_inb(unsigned long port)
  34 {
  35         if (PXSEG(port))
  36                 return *(volatile unsigned char *)port;
  37         else
  38                 return (*port2adr(port)) & 0xff;
  39 }
  40
  41 unsigned char sh7751se_inb_p(unsigned long port)
  42 {
  43         unsigned char v;
  44
  45         if (PXSEG(port))
  46                 v = *(volatile unsigned char *)port;
  47         else
  48                 v = (*port2adr(port)) & 0xff;
  49         ctrl_delay();
  50         return v;
  51 }
  52
  53 unsigned short sh7751se_inw(unsigned long port)
  54 {
  55         if (PXSEG(port))
  56                 return *(volatile unsigned short *)port;
  57         else if (port >= 0x2000)
  58                 return *port2adr(port);
  59         else
  60                 maybebadio(port);
  61         return 0;
  62 }
  63
  64 unsigned int sh7751se_inl(unsigned long port)
  65 {
  66         if (PXSEG(port))
  67                 return *(volatile unsigned long *)port;
  68         else if (port >= 0x2000)
  69                 return *port2adr(port);
  70         else
  71                 maybebadio(port);
  72         return 0;
  73 }
  74
  75 void sh7751se_outb(unsigned char value, unsigned long port)
  76 {
  77
  78         if (PXSEG(port))
  79                 *(volatile unsigned char *)port = value;
  80         else
  81                 *(port2adr(port)) = value;
  82 }
  83
  84 void sh7751se_outb_p(unsigned char value, unsigned long port)
  85 {
  86         if (PXSEG(port))
  87                 *(volatile unsigned char *)port = value;
  88         else
  89                 *(port2adr(port)) = value;
  90         ctrl_delay();
  91 }
  92
  93 void sh7751se_outw(unsigned short value, unsigned long port)
  94 {
  95         if (PXSEG(port))
  96                 *(volatile unsigned short *)port = value;
  97         else if (port >= 0x2000)
  98                 *port2adr(port) = value;
  99         else
 100                 maybebadio(port);
 101 }
 102
 103 void sh7751se_outl(unsigned int value, unsigned long port)
 104 {
 105         if (PXSEG(port))
 106                 *(volatile unsigned long *)port = value;
 107         else
 108                 maybebadio(port);
 109 }
 110
 111 void sh7751se_insl(unsigned long port, void *addr, unsigned long count)
 112 {
 113         maybebadio(port);
 114 }
 115
 116 void sh7751se_outsl(unsigned long port, const void *addr, unsigned long count)
 117 {
 118         maybebadio(port);
 119 }