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