usb: add host support for the tilegx architecture

This change adds OHCI and EHCI support for the tilegx's on-chip
USB hardware.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>

include/linux/usb/tilegx.h

@@ -0,0 +1,34 @@
+/*
+ * Copyright 2012 Tilera Corporation. All Rights Reserved.
+ *
+ *   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, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ *
+ * Structure to contain platform-specific data related to Tile-Gx USB
+ * controllers.
+ */
+
+#ifndef _LINUX_USB_TILEGX_H
+#define _LINUX_USB_TILEGX_H
+
+#include <gxio/usb_host.h>
+
+struct tilegx_usb_platform_data {
+	/* GXIO device index. */
+	int dev_index;
+
+	/* GXIO device context. */
+	gxio_usb_host_context_t usb_ctx;
+
+	/* Device IRQ. */
+	unsigned int irq;
+};
+
+#endif /* _LINUX_USB_TILEGX_H */