[PATCH] RapidIO support: core enum

Adds RapidIO enumeration/discovery.

The core code implements enumeration/discovery, management of
devices/resources, and interfaces for RIO drivers.
Signed-off-by: NMatt Porter <mporter@kernel.crashing.org>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

drivers/rapidio/switches/Makefile

+#
+# Makefile for RIO switches
+#
+
+obj-$(CONFIG_RAPIDIO)	+= tsi500.o

drivers/rapidio/switches/tsi500.c

+/*
+ * RapidIO Tsi500 switch support
+ *
+ * Copyright 2005 MontaVista Software, Inc.
+ * Matt Porter <mporter@kernel.crashing.org>
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/rio.h>
+#include <linux/rio_drv.h>
+#include <linux/rio_ids.h>
+#include "../rio.h"
+
+static int
+tsi500_route_add_entry(struct rio_mport *mport, u16 destid, u8 hopcount, u16 table, u16 route_destid, u8 route_port)
+{
+	int i;
+	u32 offset = 0x10000 + 0xa00 + ((route_destid / 2)&~0x3);
+	u32 result;
+
+	if (table == 0xff) {
+		rio_mport_read_config_32(mport, destid, hopcount, offset, &result);
+		result &= ~(0xf << (4*(route_destid & 0x7)));
+		for (i=0;i<4;i++)
+			rio_mport_write_config_32(mport, destid, hopcount, offset + (0x20000*i), result | (route_port << (4*(route_destid & 0x7))));
+	}
+	else {
+		rio_mport_read_config_32(mport, destid, hopcount, offset + (0x20000*table), &result);
+		result &= ~(0xf << (4*(route_destid & 0x7)));
+		rio_mport_write_config_32(mport, destid, hopcount, offset + (0x20000*table), result | (route_port << (4*(route_destid & 0x7))));
+	}
+
+	return 0;
+}
+
+static int
+tsi500_route_get_entry(struct rio_mport *mport, u16 destid, u8 hopcount, u16 table, u16 route_destid, u8 *route_port)
+{
+	int ret = 0;
+	u32 offset = 0x10000 + 0xa00 + ((route_destid / 2)&~0x3);
+	u32 result;
+
+	if (table == 0xff)
+		rio_mport_read_config_32(mport, destid, hopcount, offset, &result);
+	else
+		rio_mport_read_config_32(mport, destid, hopcount, offset + (0x20000*table), &result);
+
+	result &= 0xf << (4*(route_destid & 0x7));
+	*route_port = result >> (4*(route_destid & 0x7));
+	if (*route_port > 3)
+		ret = -1;
+
+	return ret;
+}
+
+DECLARE_RIO_ROUTE_OPS(RIO_VID_TUNDRA, RIO_DID_TSI500, tsi500_route_add_entry, tsi500_route_get_entry);