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io.c

/*
 * linux/arch/sh/boards/renesas/systemh/io.c
 *
 * Copyright (C) 2001  Ian da Silva, Jeremy Siegel
 * Based largely on io_se.c.
 *
 * I/O routine for Hitachi 7751 Systemh.
 */
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/pci.h>
#include <asm/systemh7751.h>
#include <asm/addrspace.h>
#include <asm/io.h>

#define ETHER_IOMAP(adr) (0xB3000000 + (adr)) /*map to 16bits access area
                                                of smc lan chip*/
static inline volatile __u16 *
port2adr(unsigned int port)
{
      if (port >= 0x2000)
            return (volatile __u16 *) (PA_MRSHPC + (port - 0x2000));
      maybebadio((unsigned long)port);
      return (volatile __u16*)port;
}

/*
 * General outline: remap really low stuff [eventually] to SuperIO,
 * stuff in PCI IO space (at or above window at pci.h:PCIBIOS_MIN_IO)
 * is mapped through the PCI IO window.  Stuff with high bits (PXSEG)
 * should be way beyond the window, and is used  w/o translation for
 * compatibility.
 */
unsigned char sh7751systemh_inb(unsigned long port)
{
      if (PXSEG(port))
            return *(volatile unsigned char *)port;
      else if (is_pci_ioaddr(port))
            return *(volatile unsigned char *)pci_ioaddr(port);
      else if (port <= 0x3F1)
            return *(volatile unsigned char *)ETHER_IOMAP(port);
      else
            return (*port2adr(port))&0xff;
}

unsigned char sh7751systemh_inb_p(unsigned long port)
{
      unsigned char v;

        if (PXSEG(port))
                v = *(volatile unsigned char *)port;
      else if (is_pci_ioaddr(port))
                v = *(volatile unsigned char *)pci_ioaddr(port);
      else if (port <= 0x3F1)
            v = *(volatile unsigned char *)ETHER_IOMAP(port);
      else
            v = (*port2adr(port))&0xff;
      ctrl_delay();
      return v;
}

unsigned short sh7751systemh_inw(unsigned long port)
{
        if (PXSEG(port))
                return *(volatile unsigned short *)port;
      else if (is_pci_ioaddr(port))
                return *(volatile unsigned short *)pci_ioaddr(port);
      else if (port >= 0x2000)
            return *port2adr(port);
      else if (port <= 0x3F1)
            return *(volatile unsigned int *)ETHER_IOMAP(port);
      else
            maybebadio(port);
      return 0;
}

unsigned int sh7751systemh_inl(unsigned long port)
{
        if (PXSEG(port))
                return *(volatile unsigned long *)port;
      else if (is_pci_ioaddr(port))
                return *(volatile unsigned int *)pci_ioaddr(port);
      else if (port >= 0x2000)
            return *port2adr(port);
      else if (port <= 0x3F1)
            return *(volatile unsigned int *)ETHER_IOMAP(port);
      else
            maybebadio(port);
      return 0;
}

void sh7751systemh_outb(unsigned char value, unsigned long port)
{

        if (PXSEG(port))
                *(volatile unsigned char *)port = value;
      else if (is_pci_ioaddr(port))
            *((unsigned char*)pci_ioaddr(port)) = value;
      else if (port <= 0x3F1)
            *(volatile unsigned char *)ETHER_IOMAP(port) = value;
      else
            *(port2adr(port)) = value;
}

void sh7751systemh_outb_p(unsigned char value, unsigned long port)
{
        if (PXSEG(port))
                *(volatile unsigned char *)port = value;
      else if (is_pci_ioaddr(port))
            *((unsigned char*)pci_ioaddr(port)) = value;
      else if (port <= 0x3F1)
            *(volatile unsigned char *)ETHER_IOMAP(port) = value;
      else
            *(port2adr(port)) = value;
      ctrl_delay();
}

void sh7751systemh_outw(unsigned short value, unsigned long port)
{
        if (PXSEG(port))
                *(volatile unsigned short *)port = value;
      else if (is_pci_ioaddr(port))
            *((unsigned short *)pci_ioaddr(port)) = value;
      else if (port >= 0x2000)
            *port2adr(port) = value;
      else if (port <= 0x3F1)
            *(volatile unsigned short *)ETHER_IOMAP(port) = value;
      else
            maybebadio(port);
}

void sh7751systemh_outl(unsigned int value, unsigned long port)
{
        if (PXSEG(port))
                *(volatile unsigned long *)port = value;
      else if (is_pci_ioaddr(port))
            *((unsigned long*)pci_ioaddr(port)) = value;
      else
            maybebadio(port);
}

void sh7751systemh_insb(unsigned long port, void *addr, unsigned long count)
{
      unsigned char *p = addr;
      while (count--) *p++ = sh7751systemh_inb(port);
}

void sh7751systemh_insw(unsigned long port, void *addr, unsigned long count)
{
      unsigned short *p = addr;
      while (count--) *p++ = sh7751systemh_inw(port);
}

void sh7751systemh_insl(unsigned long port, void *addr, unsigned long count)
{
      maybebadio(port);
}

void sh7751systemh_outsb(unsigned long port, const void *addr, unsigned long count)
{
      unsigned char *p = (unsigned char*)addr;
      while (count--) sh7751systemh_outb(*p++, port);
}

void sh7751systemh_outsw(unsigned long port, const void *addr, unsigned long count)
{
      unsigned short *p = (unsigned short*)addr;
      while (count--) sh7751systemh_outw(*p++, port);
}

void sh7751systemh_outsl(unsigned long port, const void *addr, unsigned long count)
{
      maybebadio(port);
}

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