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/*
* $Id: io.c,v 1.4 2003/08/03 03:05:10 lethal Exp $
* by Greg Banks <gbanks@pocketpenguins.com>
* (c) 2000 PocketPenguins Inc
*
* Derived from io_hd64461.c, which bore the message:
* Copyright (C) 2000 YAEGASHI Takeshi
*
* Typical I/O routines for HD64465 system.
*/
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <asm/io.h>
#include <asm/hd64465/hd64465.h>
#define HD64465_DEBUG 0
#if HD64465_DEBUG
#define DPRINTK(args...) printk(args)
#define DIPRINTK(n, args...) if (hd64465_io_debug>(n)) printk(args)
#else
#define DPRINTK(args...)
#define DIPRINTK(n, args...)
#endif
/* This is a hack suitable only for debugging IO port problems */
int hd64465_io_debug;
EXPORT_SYMBOL(hd64465_io_debug);
/* Low iomap maps port 0-1K to addresses in 8byte chunks */
#define HD64465_IOMAP_LO_THRESH 0x400
#define HD64465_IOMAP_LO_SHIFT 3
#define HD64465_IOMAP_LO_MASK ((1<<HD64465_IOMAP_LO_SHIFT)-1)
#define HD64465_IOMAP_LO_NMAP (HD64465_IOMAP_LO_THRESH>>HD64465_IOMAP_LO_SHIFT)
static unsigned long hd64465_iomap_lo[HD64465_IOMAP_LO_NMAP];
static unsigned char hd64465_iomap_lo_shift[HD64465_IOMAP_LO_NMAP];
/* High iomap maps port 1K-64K to addresses in 1K chunks */
#define HD64465_IOMAP_HI_THRESH 0x10000
#define HD64465_IOMAP_HI_SHIFT 10
#define HD64465_IOMAP_HI_MASK ((1<<HD64465_IOMAP_HI_SHIFT)-1)
#define HD64465_IOMAP_HI_NMAP (HD64465_IOMAP_HI_THRESH>>HD64465_IOMAP_HI_SHIFT)
static unsigned long hd64465_iomap_hi[HD64465_IOMAP_HI_NMAP];
static unsigned char hd64465_iomap_hi_shift[HD64465_IOMAP_HI_NMAP];
#ifndef MAX
#define MAX(a,b) ((a)>(b)?(a):(b))
#endif
#define PORT2ADDR(x) (sh_mv.mv_isa_port2addr(x))
void hd64465_port_map(unsigned short baseport, unsigned int nports,
unsigned long addr, unsigned char shift)
{
unsigned int port, endport = baseport + nports;
DPRINTK("hd64465_port_map(base=0x%04hx, n=0x%04hx, addr=0x%08lx,endport=0x%04x)\n",
baseport, nports, addr,endport);
for (port = baseport ;
port < endport && port < HD64465_IOMAP_LO_THRESH ;
port += (1<<HD64465_IOMAP_LO_SHIFT)) {
DPRINTK(" maplo[0x%x] = 0x%08lx\n", port, addr);
hd64465_iomap_lo[port>>HD64465_IOMAP_LO_SHIFT] = addr;
hd64465_iomap_lo_shift[port>>HD64465_IOMAP_LO_SHIFT] = shift;
addr += (1<<(HD64465_IOMAP_LO_SHIFT));
}
for (port = MAX(baseport, HD64465_IOMAP_LO_THRESH) ;
port < endport && port < HD64465_IOMAP_HI_THRESH ;
port += (1<<HD64465_IOMAP_HI_SHIFT)) {
DPRINTK(" maphi[0x%x] = 0x%08lx\n", port, addr);
hd64465_iomap_hi[port>>HD64465_IOMAP_HI_SHIFT] = addr;
hd64465_iomap_hi_shift[port>>HD64465_IOMAP_HI_SHIFT] = shift;
addr += (1<<(HD64465_IOMAP_HI_SHIFT));
}
}
EXPORT_SYMBOL(hd64465_port_map);
void hd64465_port_unmap(unsigned short baseport, unsigned int nports)
{
unsigned int port, endport = baseport + nports;
DPRINTK("hd64465_port_unmap(base=0x%04hx, n=0x%04hx)\n",
baseport, nports);
for (port = baseport ;
port < endport && port < HD64465_IOMAP_LO_THRESH ;
port += (1<<HD64465_IOMAP_LO_SHIFT)) {
hd64465_iomap_lo[port>>HD64465_IOMAP_LO_SHIFT] = 0;
}
for (port = MAX(baseport, HD64465_IOMAP_LO_THRESH) ;
port < endport && port < HD64465_IOMAP_HI_THRESH ;
port += (1<<HD64465_IOMAP_HI_SHIFT)) {
hd64465_iomap_hi[port>>HD64465_IOMAP_HI_SHIFT] = 0;
}
}
EXPORT_SYMBOL(hd64465_port_unmap);
unsigned long hd64465_isa_port2addr(unsigned long port)
{
unsigned long addr = 0;
unsigned char shift;
/* handle remapping of low IO ports */
if (port < HD64465_IOMAP_LO_THRESH) {
addr = hd64465_iomap_lo[port >> HD64465_IOMAP_LO_SHIFT];
shift = hd64465_iomap_lo_shift[port >> HD64465_IOMAP_LO_SHIFT];
if (addr != 0)
addr += (port & HD64465_IOMAP_LO_MASK) << shift;
else
printk(KERN_NOTICE "io_hd64465: access to un-mapped port %lx\n", port);
} else if (port < HD64465_IOMAP_HI_THRESH) {
addr = hd64465_iomap_hi[port >> HD64465_IOMAP_HI_SHIFT];
shift = hd64465_iomap_hi_shift[port >> HD64465_IOMAP_HI_SHIFT];
if (addr != 0)
addr += (port & HD64465_IOMAP_HI_MASK) << shift;
else
printk(KERN_NOTICE "io_hd64465: access to un-mapped port %lx\n", port);
}
/* HD64465 internal devices (0xb0000000) */
else if (port < 0x20000)
addr = CONFIG_HD64465_IOBASE + port - 0x10000;
/* Whole physical address space (0xa0000000) */
else
addr = P2SEGADDR(port);
DIPRINTK(2, "PORT2ADDR(0x%08lx) = 0x%08lx\n", port, addr);
return addr;
}
static inline void delay(void)
{
ctrl_inw(0xa0000000);
}
unsigned char hd64465_inb(unsigned long port)
{
unsigned long addr = PORT2ADDR(port);
unsigned long b = (addr == 0 ? 0 : *(volatile unsigned char*)addr);
DIPRINTK(0, "inb(%08lx) = %02x\n", addr, (unsigned)b);
return b;
}
unsigned char hd64465_inb_p(unsigned long port)
{
unsigned long v;
unsigned long addr = PORT2ADDR(port);
v = (addr == 0 ? 0 : *(volatile unsigned char*)addr);
delay();
DIPRINTK(0, "inb_p(%08lx) = %02x\n", addr, (unsigned)v);
return v;
}
unsigned short hd64465_inw(unsigned long port)
{
unsigned long addr = PORT2ADDR(port);
unsigned long b = (addr == 0 ? 0 : *(volatile unsigned short*)addr);
DIPRINTK(0, "inw(%08lx) = %04lx\n", addr, b);
return b;
}
unsigned int hd64465_inl(unsigned long port)
{
unsigned long addr = PORT2ADDR(port);
unsigned int b = (addr == 0 ? 0 : *(volatile unsigned long*)addr);
DIPRINTK(0, "inl(%08lx) = %08x\n", addr, b);
return b;
}
void hd64465_outb(unsigned char b, unsigned long port)
{
unsigned long addr = PORT2ADDR(port);
DIPRINTK(0, "outb(%02x, %08lx)\n", (unsigned)b, addr);
if (addr != 0)
*(volatile unsigned char*)addr = b;
}
void hd64465_outb_p(unsigned char b, unsigned long port)
{
unsigned long addr = PORT2ADDR(port);
DIPRINTK(0, "outb_p(%02x, %08lx)\n", (unsigned)b, addr);
if (addr != 0)
*(volatile unsigned char*)addr = b;
delay();
}
void hd64465_outw(unsigned short b, unsigned long port)
{
unsigned long addr = PORT2ADDR(port);
DIPRINTK(0, "outw(%04x, %08lx)\n", (unsigned)b, addr);
if (addr != 0)
*(volatile unsigned short*)addr = b;
}
void hd64465_outl(unsigned int b, unsigned long port)
{
unsigned long addr = PORT2ADDR(port);
DIPRINTK(0, "outl(%08x, %08lx)\n", b, addr);
if (addr != 0)
*(volatile unsigned long*)addr = b;
}
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