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/*
* linux/arch/sh/boards/ec3104/io.c
* EC3104 companion chip support
*
* Copyright (C) 2000 Philipp Rumpf <prumpf@tux.org>
*
*/
/* EC3104 note:
* This code was written without any documentation about the EC3104 chip. While
* I hope I got most of the basic functionality right, the register names I use
* are most likely completely different from those in the chip documentation.
*
* If you have any further information about the EC3104, please tell me
* (prumpf@tux.org).
*/
#include <linux/kernel.h>
#include <linux/types.h>
#include <asm/io.h>
#include <asm/page.h>
#include <asm/ec3104/ec3104.h>
/*
* EC3104 has a real ISA bus which we redirect low port accesses to (the
* actual device on mine is a ESS 1868, and I don't want to hack the driver
* more than strictly necessary). I am not going to duplicate the
* hard coding of PC addresses (for the 16550s aso) here though; it's just
* too ugly.
*/
#define low_port(port) ((port) < 0x10000)
static inline unsigned long port2addr(unsigned long port)
{
switch(port >> 16) {
case 0:
return EC3104_ISA_BASE + port * 2;
/* XXX hack. it's unclear what to do about the serial ports */
case 1:
return EC3104_BASE + (port&0xffff) * 4;
default:
/* XXX PCMCIA */
return 0;
}
}
unsigned char ec3104_inb(unsigned long port)
{
u8 ret;
ret = *(volatile u8 *)port2addr(port);
return ret;
}
unsigned short ec3104_inw(unsigned long port)
{
BUG();
}
unsigned long ec3104_inl(unsigned long port)
{
BUG();
}
void ec3104_outb(unsigned char data, unsigned long port)
{
*(volatile u8 *)port2addr(port) = data;
}
void ec3104_outw(unsigned short data, unsigned long port)
{
BUG();
}
void ec3104_outl(unsigned long data, unsigned long port)
{
BUG();
}
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