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/*
* arch/sh/boards/renesas/edosk7705/io.c
*
* Copyright (C) 2001 Ian da Silva, Jeremy Siegel
* Based largely on io_se.c.
*
* I/O routines for Hitachi EDOSK7705 board.
*
*/
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/io.h>
#include <mach/edosk7705.h>
#include <asm/addrspace.h>
#define SMC_IOADDR 0xA2000000
/* Map the Ethernet addresses as if it is at 0x300 - 0x320 */
static unsigned long sh_edosk7705_isa_port2addr(unsigned long port)
{
/*
* SMC91C96 registers are 4 byte aligned rather than the
* usual 2 byte!
*/
if (port >= 0x300 && port < 0x320)
return SMC_IOADDR + ((port - 0x300) * 2);
maybebadio(port);
return port;
}
/* Trying to read / write bytes on odd-byte boundaries to the Ethernet
* registers causes problems. So we bit-shift the value and read / write
* in 2 byte chunks. Setting the low byte to 0 does not cause problems
* now as odd byte writes are only made on the bit mask / interrupt
* register. This may not be the case in future Mar-2003 SJD
*/
unsigned char sh_edosk7705_inb(unsigned long port)
{
if (port >= 0x300 && port < 0x320 && port & 0x01)
return __raw_readw(port - 1) >> 8;
return __raw_readb(sh_edosk7705_isa_port2addr(port));
}
void sh_edosk7705_outb(unsigned char value, unsigned long port)
{
if (port >= 0x300 && port < 0x320 && port & 0x01) {
__raw_writew(((unsigned short)value << 8), port - 1);
return;
}
__raw_writeb(value, sh_edosk7705_isa_port2addr(port));
}
void sh_edosk7705_insb(unsigned long port, void *addr, unsigned long count)
{
unsigned char *p = addr;
while (count--)
*p++ = sh_edosk7705_inb(port);
}
void sh_edosk7705_outsb(unsigned long port, const void *addr, unsigned long count)
{
unsigned char *p = (unsigned char *)addr;
while (count--)
sh_edosk7705_outb(*p++, port);
}
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