[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: Matt Porter <mporter@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 60 insertions, 0 deletions

diff --git a/drivers/rapidio/switches/tsi500.c b/drivers/rapidio/switches/tsi500.c
new file mode 100644
index 000000000000..c77c23bd9840
--- /dev/null
+++ b/drivers/rapidio/switches/tsi500.c
@@ -0,0 +1,60 @@
+/*
+ * 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);