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diff --git a/tmk_core/protocol/arm_atsam/usb/udc_desc.h b/tmk_core/protocol/arm_atsam/usb/udc_desc.h
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+/**
+ * \file
+ *
+ * \brief Common API for USB Device Interface
+ *
+ * Copyright (c) 2009-2015 Atmel Corporation. All rights reserved.
+ *
+ * \asf_license_start
+ *
+ * \page License
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * 3. The name of Atmel may not be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * 4. This software may only be redistributed and used in connection with an
+ *    Atmel microcontroller product.
+ *
+ * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
+ * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ * \asf_license_stop
+ *
+ */
+/*
+ * Support and FAQ: visit <a href="http://www.atmel.com/design-support/">Atmel Support</a>
+ */
+
+#ifndef _UDC_DESC_H_
+#define _UDC_DESC_H_
+
+#include "conf_usb.h"
+#include "usb_protocol.h"
+#include "udi.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * \ingroup udc_group
+ * \defgroup udc_desc_group USB Device Descriptor
+ *
+ * @{
+ */
+
+/**
+ * \brief Defines the memory's location of USB descriptors
+ *
+ * By default the Descriptor is stored in RAM
+ * (UDC_DESC_STORAGE is defined empty).
+ *
+ * If you have need to free RAM space,
+ * it is possible to put descriptor in flash in following case:
+ * - USB driver authorize flash transfer (USBB on UC3 and USB on Mega)
+ * - USB Device is not high speed (UDC no need to change USB descriptors)
+ *
+ * For UC3 application used "const".
+ *
+ * For Mega application used "code".
+ */
+#define  UDC_DESC_STORAGE
+    // Descriptor storage in internal RAM
+#if (defined UDC_DATA_USE_HRAM_SUPPORT)
+#if defined(__GNUC__)
+#define UDC_DATA(x)              COMPILER_WORD_ALIGNED __attribute__((__section__(".data_hram0")))
+#define UDC_BSS(x)               COMPILER_ALIGNED(x)   __attribute__((__section__(".bss_hram0")))
+#elif defined(__ICCAVR32__)
+#define UDC_DATA(x)              COMPILER_ALIGNED(x)   __data32
+#define UDC_BSS(x)               COMPILER_ALIGNED(x)   __data32
+#endif
+#else
+#define UDC_DATA(x)              COMPILER_ALIGNED(x)
+#define UDC_BSS(x)               COMPILER_ALIGNED(x)
+#endif
+
+
+
+/**
+ * \brief Configuration descriptor and UDI link for one USB speed
+ */
+typedef struct {
+    //! USB configuration descriptor
+    usb_conf_desc_t UDC_DESC_STORAGE *desc;
+    //! Array of UDI API pointer
+    udi_api_t UDC_DESC_STORAGE *UDC_DESC_STORAGE * udi_apis;
+} udc_config_speed_t;
+
+
+/**
+ * \brief All information about the USB Device
+ */
+typedef struct {
+    //! USB device descriptor for low or full speed
+    usb_dev_desc_t UDC_DESC_STORAGE *confdev_lsfs;
+    //! USB configuration descriptor and UDI API pointers for low or full speed
+    udc_config_speed_t UDC_DESC_STORAGE *conf_lsfs;
+#ifdef USB_DEVICE_HS_SUPPORT
+    //! USB device descriptor for high speed
+    usb_dev_desc_t UDC_DESC_STORAGE *confdev_hs;
+    //! USB device qualifier, only use in high speed mode
+    usb_dev_qual_desc_t UDC_DESC_STORAGE *qualifier;
+    //! USB configuration descriptor and UDI API pointers for high speed
+    udc_config_speed_t UDC_DESC_STORAGE *conf_hs;
+#endif
+    usb_dev_bos_desc_t UDC_DESC_STORAGE *conf_bos;
+} udc_config_t;
+
+//! Global variables of USB Device Descriptor and UDI links
+extern UDC_DESC_STORAGE udc_config_t udc_config;
+
+//@}
+
+#ifdef __cplusplus
+}
+#endif
+#endif // _UDC_DESC_H_