patch-2.4.22 linux-2.4.22/arch/sh64/lib/io.c

• Lines: 202
• Date: 2003-08-25 04:44:40.000000000 -0700
• Orig file: linux-2.4.21/arch/sh64/lib/io.c
• Orig date: 1969-12-31 16:00:00.000000000 -0800

diff -urN linux-2.4.21/arch/sh64/lib/io.c linux-2.4.22/arch/sh64/lib/io.c
@@ -0,0 +1,201 @@
+/* 
+ * 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/system.h>
+#include <asm/processor.h>
+#include <asm/io.h>
+#ifdef CONFIG_SH_CAYMAN
+#include <asm/cayman.h>
+#endif
+
+/*
+ * 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...)
+
+//#define io_addr(x)  (((unsigned)(x) & 0x000fffff)| PCI_ST50_IO_ADDR )
+
+#ifdef CONFIG_SH_CAYMAN
+extern unsigned long smsc_virt;
+extern unsigned long pciio_virt;
+#define io_addr(x)  ( ((x)<0x400) ? \
+			(((x) << 2)|smsc_virt) : \
+			((unsigned long)(x)+pciio_virt) )
+#else
+#define io_addr(x)  ((unsigned long)(x)+pciio_virt)
+#endif
+
+unsigned long inb(unsigned long port)
+{
+	unsigned long r;
+
+	r = ctrl_inb(io_addr(port));
+	dprintk("inb(0x%x)=0x%x (0x%x)\n", port, r, io_addr(port));
+	return r;
+}
+
+unsigned long inw(unsigned long port)
+{
+	unsigned long r;
+
+	r = ctrl_inw(io_addr(port));
+	dprintk("inw(0x%x)=0x%x (0x%x)\n", port, r, io_addr(port));
+	return r;
+}
+
+unsigned long inl(unsigned long port)
+{
+	unsigned long r;
+
+	r = ctrl_inl(io_addr(port));
+	dprintk("inl(0x%x)=0x%x (0x%x)\n", port, r, io_addr(port));
+	return r;
+}
+
+void outb(unsigned long value, unsigned long port)
+{
+	dprintk("outb(0x%x,0x%x) (0x%x)\n", value, port, io_addr(port));
+	ctrl_outb(value, io_addr(port));
+}
+
+void outw(unsigned long value, unsigned long port)
+{
+	dprintk("outw(0x%x,0x%x) (0x%x)\n", value, port, io_addr(port));
+	ctrl_outw(value, io_addr(port));
+}
+
+void outl(unsigned long value, unsigned long port)
+{
+	dprintk("outw(0x%x,0x%x) (0x%x)\n", value, port, io_addr(port));
+	ctrl_outl(value, io_addr(port));
+}
+
+/* This is horrible at the moment - needs more work to do something sensible */
+#define IO_DELAY()
+
+#define OUT_DELAY(x,type) \
+void out##x##_p(unsigned type value,unsigned long port){out##x(value,port);IO_DELAY();}
+
+#define IN_DELAY(x,type) \
+unsigned type in##x##_p(unsigned long port) {unsigned type tmp=in##x(port);IO_DELAY();return tmp;}
+
+#if 1
+OUT_DELAY(b, long) OUT_DELAY(w, long) OUT_DELAY(l, long)
+ IN_DELAY(b, long) IN_DELAY(w, long) IN_DELAY(l, long)
+#endif
+/*  Now for the string version of these functions */
+void 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 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 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 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 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 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;
+
+	}
+}
+
+void memcpy_toio(unsigned long to, const void *from, long count)
+{
+	unsigned char *p = (unsigned char *) from;
+
+	while (count) {
+		count--;
+		writeb(*p++, to++);
+	}
+}
+
+void memcpy_fromio(void *to, unsigned long from, long count)
+{
+	int i;
+	unsigned char *p = (unsigned char *) to;
+
+	for (i = 0; i < count; i++) {
+		p[i] = readb(from);
+		from++;
+	}
+}