arch/sh/boards/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 <asm/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 if (is_pci_ioaddr(port))
  38                 return *(volatile unsigned char *)pci_ioaddr(port);
  39         else
  40                 return (*port2adr(port)) & 0xff;
  41 }
  42
  43 unsigned char sh7751se_inb_p(unsigned long port)
  44 {
  45         unsigned char v;
  46
  47         if (PXSEG(port))
  48                 v = *(volatile unsigned char *)port;
  49         else if (is_pci_ioaddr(port))
  50                 v = *(volatile unsigned char *)pci_ioaddr(port);
  51         else
  52                 v = (*port2adr(port)) & 0xff;
  53         ctrl_delay();
  54         return v;
  55 }
  56
  57 unsigned short sh7751se_inw(unsigned long port)
  58 {
  59         if (PXSEG(port))
  60                 return *(volatile unsigned short *)port;
  61         else if (is_pci_ioaddr(port))
  62                 return *(volatile unsigned short *)pci_ioaddr(port);
  63         else if (port >= 0x2000)
  64                 return *port2adr(port);
  65         else
  66                 maybebadio(port);
  67         return 0;
  68 }
  69
  70 unsigned int sh7751se_inl(unsigned long port)
  71 {
  72         if (PXSEG(port))
  73                 return *(volatile unsigned long *)port;
  74         else if (is_pci_ioaddr(port))
  75                 return *(volatile unsigned int *)pci_ioaddr(port);
  76         else if (port >= 0x2000)
  77                 return *port2adr(port);
  78         else
  79                 maybebadio(port);
  80         return 0;
  81 }
  82
  83 void sh7751se_outb(unsigned char value, unsigned long port)
  84 {
  85
  86         if (PXSEG(port))
  87                 *(volatile unsigned char *)port = value;
  88         else if (is_pci_ioaddr(port))
  89                 *((unsigned char*)pci_ioaddr(port)) = value;
  90         else
  91                 *(port2adr(port)) = value;
  92 }
  93
  94 void sh7751se_outb_p(unsigned char value, unsigned long port)
  95 {
  96         if (PXSEG(port))
  97                 *(volatile unsigned char *)port = value;
  98         else if (is_pci_ioaddr(port))
  99                 *((unsigned char*)pci_ioaddr(port)) = value;
 100         else
 101                 *(port2adr(port)) = value;
 102         ctrl_delay();
 103 }
 104
 105 void sh7751se_outw(unsigned short value, unsigned long port)
 106 {
 107         if (PXSEG(port))
 108                 *(volatile unsigned short *)port = value;
 109         else if (is_pci_ioaddr(port))
 110                 *((unsigned short *)pci_ioaddr(port)) = value;
 111         else if (port >= 0x2000)
 112                 *port2adr(port) = value;
 113         else
 114                 maybebadio(port);
 115 }
 116
 117 void sh7751se_outl(unsigned int value, unsigned long port)
 118 {
 119         if (PXSEG(port))
 120                 *(volatile unsigned long *)port = value;
 121         else if (is_pci_ioaddr(port))
 122                 *((unsigned long*)pci_ioaddr(port)) = value;
 123         else
 124                 maybebadio(port);
 125 }
 126
 127 void sh7751se_insl(unsigned long port, void *addr, unsigned long count)
 128 {
 129         maybebadio(port);
 130 }
 131
 132 void sh7751se_outsl(unsigned long port, const void *addr, unsigned long count)
 133 {
 134         maybebadio(port);
 135 }