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

   1 /*
   2  * linux/arch/sh/boards/renesas/systemh/io.c
   3  *
   4  * Copyright (C) 2001  Ian da Silva, Jeremy Siegel
   5  * Based largely on io_se.c.
   6  *
   7  * I/O routine for Hitachi 7751 Systemh.
   8  */
   9 #include <linux/kernel.h>
  10 #include <linux/types.h>
  11 #include <linux/pci.h>
  12 #include <mach/systemh7751.h>
  13 #include <asm/addrspace.h>
  14 #include <asm/io.h>
  15
  16 #define ETHER_IOMAP(adr) (0xB3000000 + (adr)) /*map to 16bits access area
  17                                                 of smc lan chip*/
  18 static inline volatile __u16 *
  19 port2adr(unsigned int port)
  20 {
  21         if (port >= 0x2000)
  22                 return (volatile __u16 *) (PA_MRSHPC + (port - 0x2000));
  23         maybebadio((unsigned long)port);
  24         return (volatile __u16*)port;
  25 }
  26
  27 /*
  28  * General outline: remap really low stuff [eventually] to SuperIO,
  29  * stuff in PCI IO space (at or above window at pci.h:PCIBIOS_MIN_IO)
  30  * is mapped through the PCI IO window.  Stuff with high bits (PXSEG)
  31  * should be way beyond the window, and is used  w/o translation for
  32  * compatibility.
  33  */
  34 unsigned char sh7751systemh_inb(unsigned long port)
  35 {
  36         if (PXSEG(port))
  37                 return *(volatile unsigned char *)port;
  38         else if (port <= 0x3F1)
  39                 return *(volatile unsigned char *)ETHER_IOMAP(port);
  40         else
  41                 return (*port2adr(port))&0xff;
  42 }
  43
  44 unsigned char sh7751systemh_inb_p(unsigned long port)
  45 {
  46         unsigned char v;
  47
  48         if (PXSEG(port))
  49                 v = *(volatile unsigned char *)port;
  50         else if (port <= 0x3F1)
  51                 v = *(volatile unsigned char *)ETHER_IOMAP(port);
  52         else
  53                 v = (*port2adr(port))&0xff;
  54         ctrl_delay();
  55         return v;
  56 }
  57
  58 unsigned short sh7751systemh_inw(unsigned long port)
  59 {
  60         if (PXSEG(port))
  61                 return *(volatile unsigned short *)port;
  62         else if (port >= 0x2000)
  63                 return *port2adr(port);
  64         else if (port <= 0x3F1)
  65                 return *(volatile unsigned int *)ETHER_IOMAP(port);
  66         else
  67                 maybebadio(port);
  68         return 0;
  69 }
  70
  71 unsigned int sh7751systemh_inl(unsigned long port)
  72 {
  73         if (PXSEG(port))
  74                 return *(volatile unsigned long *)port;
  75         else if (port >= 0x2000)
  76                 return *port2adr(port);
  77         else if (port <= 0x3F1)
  78                 return *(volatile unsigned int *)ETHER_IOMAP(port);
  79         else
  80                 maybebadio(port);
  81         return 0;
  82 }
  83
  84 void sh7751systemh_outb(unsigned char value, unsigned long port)
  85 {
  86
  87         if (PXSEG(port))
  88                 *(volatile unsigned char *)port = value;
  89         else if (port <= 0x3F1)
  90                 *(volatile unsigned char *)ETHER_IOMAP(port) = value;
  91         else
  92                 *(port2adr(port)) = value;
  93 }
  94
  95 void sh7751systemh_outb_p(unsigned char value, unsigned long port)
  96 {
  97         if (PXSEG(port))
  98                 *(volatile unsigned char *)port = value;
  99         else if (port <= 0x3F1)
 100                 *(volatile unsigned char *)ETHER_IOMAP(port) = value;
 101         else
 102                 *(port2adr(port)) = value;
 103         ctrl_delay();
 104 }
 105
 106 void sh7751systemh_outw(unsigned short value, unsigned long port)
 107 {
 108         if (PXSEG(port))
 109                 *(volatile unsigned short *)port = value;
 110         else if (port >= 0x2000)
 111                 *port2adr(port) = value;
 112         else if (port <= 0x3F1)
 113                 *(volatile unsigned short *)ETHER_IOMAP(port) = value;
 114         else
 115                 maybebadio(port);
 116 }
 117
 118 void sh7751systemh_outl(unsigned int value, unsigned long port)
 119 {
 120         if (PXSEG(port))
 121                 *(volatile unsigned long *)port = value;
 122         else
 123                 maybebadio(port);
 124 }
 125
 126 void sh7751systemh_insb(unsigned long port, void *addr, unsigned long count)
 127 {
 128         unsigned char *p = addr;
 129         while (count--) *p++ = sh7751systemh_inb(port);
 130 }
 131
 132 void sh7751systemh_insw(unsigned long port, void *addr, unsigned long count)
 133 {
 134         unsigned short *p = addr;
 135         while (count--) *p++ = sh7751systemh_inw(port);
 136 }
 137
 138 void sh7751systemh_insl(unsigned long port, void *addr, unsigned long count)
 139 {
 140         maybebadio(port);
 141 }
 142
 143 void sh7751systemh_outsb(unsigned long port, const void *addr, unsigned long count)
 144 {
 145         unsigned char *p = (unsigned char*)addr;
 146         while (count--) sh7751systemh_outb(*p++, port);
 147 }
 148
 149 void sh7751systemh_outsw(unsigned long port, const void *addr, unsigned long count)
 150 {
 151         unsigned short *p = (unsigned short*)addr;
 152         while (count--) sh7751systemh_outw(*p++, port);
 153 }
 154
 155 void sh7751systemh_outsl(unsigned long port, const void *addr, unsigned long count)
 156 {
 157         maybebadio(port);
 158 }