patch-2.4.4 linux/arch/sh/kernel/io_ec3104.c

• Lines: 84
• Date: Wed Apr 11 21:24:52 2001
• Orig file: v2.4.3/linux/arch/sh/kernel/io_ec3104.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.3/linux/arch/sh/kernel/io_ec3104.c linux/arch/sh/kernel/io_ec3104.c
@@ -0,0 +1,83 @@
+/*
+ * linux/arch/sh/kernel/io_ec3104.c
+ *  EC3104 companion chip support
+ *
+ * Copyright (C) 2000 Philipp Rumpf <prumpf@tux.org>
+ *
+ */
+/* EC3104 note:
+ * This code was written without any documentation about the EC3104 chip.  While
+ * I hope I got most of the basic functionality right, the register names I use
+ * are most likely completely different from those in the chip documentation.
+ *
+ * If you have any further information about the EC3104, please tell me
+ * (prumpf@tux.org).
+ */
+
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <asm/io.h>
+#include <asm/page.h>
+#include <asm/ec3104.h>
+
+/*
+ * EC3104 has a real ISA bus which we redirect low port accesses to (the
+ * actual device on mine is a ESS 1868, and I don't want to hack the driver
+ * more than strictly necessary).  I am not going to duplicate the
+ * hard coding of PC addresses (for the 16550s aso) here though;  it's just
+ * too ugly.
+ */
+
+#define low_port(port) ((port) < 0x10000)
+
+static inline unsigned long port2addr(unsigned long port)
+{
+	switch(port >> 16) {
+	case 0:
+		return EC3104_ISA_BASE + port * 2;
+
+		/* XXX hack. it's unclear what to do about the serial ports */
+	case 1:
+		return EC3104_BASE + (port&0xffff) * 4;
+
+	default:
+		/* XXX PCMCIA */
+		return 0;
+	}
+}
+
+unsigned char ec3104_inb(unsigned long port)
+{
+	u8 ret;
+
+	ret = *(volatile u8 *)port2addr(port);
+
+	return ret;
+}
+
+unsigned short ec3104_inw(unsigned long port)
+{
+	BUG();
+}
+
+unsigned long ec3104_inl(unsigned long port)
+{
+	BUG();
+}
+
+void ec3104_outb(unsigned char data, unsigned long port)
+{
+	*(volatile u8 *)port2addr(port) = data;
+}
+
+void ec3104_outw(unsigned short data, unsigned long port)
+{
+	BUG();
+}
+
+void ec3104_outl(unsigned long data, unsigned long port)
+{
+	BUG();
+}