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 (is_pci_ioaddr(port))
  39                 return *(volatile unsigned char *)pci_ioaddr(port);
  40         else if (port <= 0x3F1)
  41                 return *(volatile unsigned char *)ETHER_IOMAP(port);
  42         else
  43                 return (*port2adr(port))&0xff;
  44 }
  45
  46 unsigned char sh7751systemh_inb_p(unsigned long port)
  47 {
  48         unsigned char v;
  49
  50         if (PXSEG(port))
  51                 v = *(volatile unsigned char *)port;
  52         else if (is_pci_ioaddr(port))
  53                 v = *(volatile unsigned char *)pci_ioaddr(port);
  54         else if (port <= 0x3F1)
  55                 v = *(volatile unsigned char *)ETHER_IOMAP(port);
  56         else
  57                 v = (*port2adr(port))&0xff;
  58         ctrl_delay();
  59         return v;
  60 }
  61
  62 unsigned short sh7751systemh_inw(unsigned long port)
  63 {
  64         if (PXSEG(port))
  65                 return *(volatile unsigned short *)port;
  66         else if (is_pci_ioaddr(port))
  67                 return *(volatile unsigned short *)pci_ioaddr(port);
  68         else if (port >= 0x2000)
  69                 return *port2adr(port);
  70         else if (port <= 0x3F1)
  71                 return *(volatile unsigned int *)ETHER_IOMAP(port);
  72         else
  73                 maybebadio(port);
  74         return 0;
  75 }
  76
  77 unsigned int sh7751systemh_inl(unsigned long port)
  78 {
  79         if (PXSEG(port))
  80                 return *(volatile unsigned long *)port;
  81         else if (is_pci_ioaddr(port))
  82                 return *(volatile unsigned int *)pci_ioaddr(port);
  83         else if (port >= 0x2000)
  84                 return *port2adr(port);
  85         else if (port <= 0x3F1)
  86                 return *(volatile unsigned int *)ETHER_IOMAP(port);
  87         else
  88                 maybebadio(port);
  89         return 0;
  90 }
  91
  92 void sh7751systemh_outb(unsigned char value, unsigned long port)
  93 {
  94
  95         if (PXSEG(port))
  96                 *(volatile unsigned char *)port = value;
  97         else if (is_pci_ioaddr(port))
  98                 *((unsigned char*)pci_ioaddr(port)) = value;
  99         else if (port <= 0x3F1)
 100                 *(volatile unsigned char *)ETHER_IOMAP(port) = value;
 101         else
 102                 *(port2adr(port)) = value;
 103 }
 104
 105 void sh7751systemh_outb_p(unsigned char value, unsigned long port)
 106 {
 107         if (PXSEG(port))
 108                 *(volatile unsigned char *)port = value;
 109         else if (is_pci_ioaddr(port))
 110                 *((unsigned char*)pci_ioaddr(port)) = value;
 111         else if (port <= 0x3F1)
 112                 *(volatile unsigned char *)ETHER_IOMAP(port) = value;
 113         else
 114                 *(port2adr(port)) = value;
 115         ctrl_delay();
 116 }
 117
 118 void sh7751systemh_outw(unsigned short value, unsigned long port)
 119 {
 120         if (PXSEG(port))
 121                 *(volatile unsigned short *)port = value;
 122         else if (is_pci_ioaddr(port))
 123                 *((unsigned short *)pci_ioaddr(port)) = value;
 124         else if (port >= 0x2000)
 125                 *port2adr(port) = value;
 126         else if (port <= 0x3F1)
 127                 *(volatile unsigned short *)ETHER_IOMAP(port) = value;
 128         else
 129                 maybebadio(port);
 130 }
 131
 132 void sh7751systemh_outl(unsigned int value, unsigned long port)
 133 {
 134         if (PXSEG(port))
 135                 *(volatile unsigned long *)port = value;
 136         else if (is_pci_ioaddr(port))
 137                 *((unsigned long*)pci_ioaddr(port)) = value;
 138         else
 139                 maybebadio(port);
 140 }
 141
 142 void sh7751systemh_insb(unsigned long port, void *addr, unsigned long count)
 143 {
 144         unsigned char *p = addr;
 145         while (count--) *p++ = sh7751systemh_inb(port);
 146 }
 147
 148 void sh7751systemh_insw(unsigned long port, void *addr, unsigned long count)
 149 {
 150         unsigned short *p = addr;
 151         while (count--) *p++ = sh7751systemh_inw(port);
 152 }
 153
 154 void sh7751systemh_insl(unsigned long port, void *addr, unsigned long count)
 155 {
 156         maybebadio(port);
 157 }
 158
 159 void sh7751systemh_outsb(unsigned long port, const void *addr, unsigned long count)
 160 {
 161         unsigned char *p = (unsigned char*)addr;
 162         while (count--) sh7751systemh_outb(*p++, port);
 163 }
 164
 165 void sh7751systemh_outsw(unsigned long port, const void *addr, unsigned long count)
 166 {
 167         unsigned short *p = (unsigned short*)addr;
 168         while (count--) sh7751systemh_outw(*p++, port);
 169 }
 170
 171 void sh7751systemh_outsl(unsigned long port, const void *addr, unsigned long count)
 172 {
 173         maybebadio(port);
 174 }