82 lines
1.7 KiB
C
82 lines
1.7 KiB
C
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/*
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* linux/arch/sh/kernel/io_ec3104.c
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* EC3104 companion chip support
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*
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* Copyright (C) 2000 Philipp Rumpf <prumpf@tux.org>
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*
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*/
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/* EC3104 note:
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* This code was written without any documentation about the EC3104 chip. While
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* I hope I got most of the basic functionality right, the register names I use
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* are most likely completely different from those in the chip documentation.
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*
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* If you have any further information about the EC3104, please tell me
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* (prumpf@tux.org).
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*/
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <asm/io.h>
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#include <asm/page.h>
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#include <asm/ec3104/ec3104.h>
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/*
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* EC3104 has a real ISA bus which we redirect low port accesses to (the
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* actual device on mine is a ESS 1868, and I don't want to hack the driver
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* more than strictly necessary). I am not going to duplicate the
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* hard coding of PC addresses (for the 16550s aso) here though; it's just
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* too ugly.
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*/
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#define low_port(port) ((port) < 0x10000)
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static inline unsigned long port2addr(unsigned long port)
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{
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switch(port >> 16) {
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case 0:
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return EC3104_ISA_BASE + port * 2;
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/* XXX hack. it's unclear what to do about the serial ports */
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case 1:
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return EC3104_BASE + (port&0xffff) * 4;
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default:
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/* XXX PCMCIA */
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return 0;
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}
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}
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unsigned char ec3104_inb(unsigned long port)
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{
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u8 ret;
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ret = *(volatile u8 *)port2addr(port);
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return ret;
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}
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unsigned short ec3104_inw(unsigned long port)
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{
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BUG();
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}
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unsigned long ec3104_inl(unsigned long port)
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{
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BUG();
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}
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void ec3104_outb(unsigned char data, unsigned long port)
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{
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*(volatile u8 *)port2addr(port) = data;
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}
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void ec3104_outw(unsigned short data, unsigned long port)
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{
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BUG();
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}
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void ec3104_outl(unsigned long data, unsigned long port)
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{
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BUG();
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}
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