174 lines
3.8 KiB
C
174 lines
3.8 KiB
C
/*
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* Copyright (C) 2000 David J. Mckay (david.mckay@st.com)
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*
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* May be copied or modified under the terms of the GNU General Public
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* License. See linux/COPYING for more information.
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*
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* This file contains the I/O routines for use on the overdrive board
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*
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*/
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#include <linux/config.h>
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#include <linux/types.h>
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#include <linux/delay.h>
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#include <asm/processor.h>
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#include <asm/io.h>
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#include <asm/addrspace.h>
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#include <asm/overdrive/overdrive.h>
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/*
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* readX/writeX() are used to access memory mapped devices. On some
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* architectures the memory mapped IO stuff needs to be accessed
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* differently. On the SuperH architecture, we just read/write the
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* memory location directly.
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*/
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#define dprintk(x...)
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/* Translates an IO address to where it is mapped in memory */
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#define io_addr(x) (((unsigned)(x))|PCI_GTIO_BASE)
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unsigned char od_inb(unsigned long port)
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{
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dprintk("od_inb(%x)\n", port);
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return readb(io_addr(port)) & 0xff;
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}
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unsigned short od_inw(unsigned long port)
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{
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dprintk("od_inw(%x)\n", port);
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return readw(io_addr(port)) & 0xffff;
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}
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unsigned int od_inl(unsigned long port)
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{
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dprintk("od_inl(%x)\n", port);
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return readl(io_addr(port));
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}
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void od_outb(unsigned char value, unsigned long port)
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{
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dprintk("od_outb(%x, %x)\n", value, port);
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writeb(value, io_addr(port));
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}
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void od_outw(unsigned short value, unsigned long port)
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{
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dprintk("od_outw(%x, %x)\n", value, port);
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writew(value, io_addr(port));
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}
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void od_outl(unsigned int value, unsigned long port)
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{
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dprintk("od_outl(%x, %x)\n", value, port);
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writel(value, io_addr(port));
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}
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/* This is horrible at the moment - needs more work to do something sensible */
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#define IO_DELAY() udelay(10)
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#define OUT_DELAY(x,type) \
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void od_out##x##_p(unsigned type value,unsigned long port){out##x(value,port);IO_DELAY();}
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#define IN_DELAY(x,type) \
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unsigned type od_in##x##_p(unsigned long port) {unsigned type tmp=in##x(port);IO_DELAY();return tmp;}
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OUT_DELAY(b,char)
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OUT_DELAY(w,short)
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OUT_DELAY(l,int)
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IN_DELAY(b,char)
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IN_DELAY(w,short)
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IN_DELAY(l,int)
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/* Now for the string version of these functions */
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void od_outsb(unsigned long port, const void *addr, unsigned long count)
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{
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int i;
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unsigned char *p = (unsigned char *) addr;
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for (i = 0; i < count; i++, p++) {
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outb(*p, port);
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}
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}
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void od_insb(unsigned long port, void *addr, unsigned long count)
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{
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int i;
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unsigned char *p = (unsigned char *) addr;
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for (i = 0; i < count; i++, p++) {
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*p = inb(port);
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}
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}
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/* For the 16 and 32 bit string functions, we have to worry about alignment.
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* The SH does not do unaligned accesses, so we have to read as bytes and
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* then write as a word or dword.
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* This can be optimised a lot more, especially in the case where the data
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* is aligned
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*/
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void od_outsw(unsigned long port, const void *addr, unsigned long count)
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{
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int i;
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unsigned short tmp;
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unsigned char *p = (unsigned char *) addr;
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for (i = 0; i < count; i++, p += 2) {
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tmp = (*p) | ((*(p + 1)) << 8);
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outw(tmp, port);
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}
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}
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void od_insw(unsigned long port, void *addr, unsigned long count)
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{
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int i;
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unsigned short tmp;
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unsigned char *p = (unsigned char *) addr;
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for (i = 0; i < count; i++, p += 2) {
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tmp = inw(port);
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p[0] = tmp & 0xff;
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p[1] = (tmp >> 8) & 0xff;
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}
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}
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void od_outsl(unsigned long port, const void *addr, unsigned long count)
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{
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int i;
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unsigned tmp;
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unsigned char *p = (unsigned char *) addr;
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for (i = 0; i < count; i++, p += 4) {
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tmp = (*p) | ((*(p + 1)) << 8) | ((*(p + 2)) << 16) |
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((*(p + 3)) << 24);
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outl(tmp, port);
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}
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}
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void od_insl(unsigned long port, void *addr, unsigned long count)
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{
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int i;
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unsigned tmp;
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unsigned char *p = (unsigned char *) addr;
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for (i = 0; i < count; i++, p += 4) {
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tmp = inl(port);
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p[0] = tmp & 0xff;
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p[1] = (tmp >> 8) & 0xff;
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p[2] = (tmp >> 16) & 0xff;
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p[3] = (tmp >> 24) & 0xff;
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}
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}
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