1 files changed, 173 insertions, 0 deletions

diff --git a/arch/sh/boards/overdrive/io.c b/arch/sh/boards/overdrive/io.c
new file mode 100644
index 000000000000..65f3fd0563d3
--- /dev/null
+++ b/arch/sh/boards/overdrive/io.c
@@ -0,0 +1,173 @@
+/* 
+ * Copyright (C) 2000 David J. Mckay (david.mckay@st.com)
+ *
+ * May be copied or modified under the terms of the GNU General Public
+ * License.  See linux/COPYING for more information.                            
+ *
+ * This file contains the I/O routines for use on the overdrive board
+ *
+ */
+
+#include <linux/config.h>
+#include <linux/types.h>
+#include <linux/delay.h>
+#include <asm/processor.h>
+#include <asm/io.h>
+#include <asm/addrspace.h>
+
+#include <asm/overdrive/overdrive.h>
+
+/*
+ * readX/writeX() are used to access memory mapped devices. On some
+ * architectures the memory mapped IO stuff needs to be accessed
+ * differently. On the SuperH architecture, we just read/write the
+ * memory location directly.
+ */
+
+#define dprintk(x...)
+
+/* Translates an IO address to where it is mapped in memory */
+
+#define io_addr(x) (((unsigned)(x))|PCI_GTIO_BASE)
+
+unsigned char od_inb(unsigned long port)
+{
+dprintk("od_inb(%x)\n", port);
+        return readb(io_addr(port)) & 0xff;
+}
+
+
+unsigned short od_inw(unsigned long port)
+{
+dprintk("od_inw(%x)\n", port);
+        return readw(io_addr(port)) & 0xffff;
+}
+
+unsigned int od_inl(unsigned long port)
+{
+dprintk("od_inl(%x)\n", port);
+        return readl(io_addr(port));
+}
+
+void od_outb(unsigned char value, unsigned long port)
+{
+dprintk("od_outb(%x, %x)\n", value, port);
+        writeb(value, io_addr(port));
+}
+
+void od_outw(unsigned short value, unsigned long port)
+{
+dprintk("od_outw(%x, %x)\n", value, port);
+        writew(value, io_addr(port));
+}
+
+void od_outl(unsigned int value, unsigned long port)
+{
+dprintk("od_outl(%x, %x)\n", value, port);
+        writel(value, io_addr(port));
+}
+
+/* This is horrible at the moment - needs more work to do something sensible */
+#define IO_DELAY() udelay(10)
+
+#define OUT_DELAY(x,type) \
+void od_out##x##_p(unsigned type value,unsigned long port){out##x(value,port);IO_DELAY();}
+
+#define IN_DELAY(x,type) \
+unsigned type od_in##x##_p(unsigned long port) {unsigned type tmp=in##x(port);IO_DELAY();return tmp;}
+
+
+OUT_DELAY(b,char)
+OUT_DELAY(w,short)
+OUT_DELAY(l,int)
+
+IN_DELAY(b,char)
+IN_DELAY(w,short)
+IN_DELAY(l,int)
+
+
+/*  Now for the string version of these functions */
+void od_outsb(unsigned long port, const void *addr, unsigned long count)
+{
+        int i;
+        unsigned char *p = (unsigned char *) addr;
+
+        for (i = 0; i < count; i++, p++) {
+                outb(*p, port);
+        }
+}
+
+
+void od_insb(unsigned long port, void *addr, unsigned long count)
+{
+        int i;
+        unsigned char *p = (unsigned char *) addr;
+
+        for (i = 0; i < count; i++, p++) {
+                *p = inb(port);
+        }
+}
+
+/* For the 16 and 32 bit string functions, we have to worry about alignment.
+ * The SH does not do unaligned accesses, so we have to read as bytes and
+ * then write as a word or dword. 
+ * This can be optimised a lot more, especially in the case where the data
+ * is aligned
+ */
+
+void od_outsw(unsigned long port, const void *addr, unsigned long count)
+{
+        int i;
+        unsigned short tmp;
+        unsigned char *p = (unsigned char *) addr;
+
+        for (i = 0; i < count; i++, p += 2) {
+                tmp = (*p) | ((*(p + 1)) << 8);
+                outw(tmp, port);
+        }
+}
+
+
+void od_insw(unsigned long port, void *addr, unsigned long count)
+{
+        int i;
+        unsigned short tmp;
+        unsigned char *p = (unsigned char *) addr;
+
+        for (i = 0; i < count; i++, p += 2) {
+                tmp = inw(port);
+                p[0] = tmp & 0xff;
+                p[1] = (tmp >> 8) & 0xff;
+        }
+}
+
+
+void od_outsl(unsigned long port, const void *addr, unsigned long count)
+{
+        int i;
+        unsigned tmp;
+        unsigned char *p = (unsigned char *) addr;
+
+        for (i = 0; i < count; i++, p += 4) {
+                tmp = (*p) | ((*(p + 1)) << 8) | ((*(p + 2)) << 16) |
+                      ((*(p + 3)) << 24);
+                outl(tmp, port);
+        }
+}
+
+
+void od_insl(unsigned long port, void *addr, unsigned long count)
+{
+        int i;
+        unsigned tmp;
+        unsigned char *p = (unsigned char *) addr;
+
+        for (i = 0; i < count; i++, p += 4) {
+                tmp = inl(port);
+                p[0] = tmp & 0xff;
+                p[1] = (tmp >> 8) & 0xff;
+                p[2] = (tmp >> 16) & 0xff;
+                p[3] = (tmp >> 24) & 0xff;
+
+        }
+}