text: /*
   * Copyright (c) 2018 Intel Corporation
   *
   * SPDX-License-Identifier: Apache-2.0
   */
  
  #define LOG_LEVEL CONFIG_USB_DEVICE_LOG_LEVEL
  #include <logging/log.h>
  LOG_MODULE_REGISTER(usb_os_desc)
  
  #include <zephyr.h>
  
  #include <usb/usb_device.h>
  #include <os_desc.h>
  
  static struct usb_os_descriptor *os_desc;
  
  int usb_handle_os_desc(struct usb_setup_packet *setup,
  		       s32_t *len, u8_t **data)
  {
  	LOG_DBG("wValue 0x%x", setup->wValue);
  
  	if (!os_desc) {
  		return -ENOTSUP;
  	}
  
  	if (GET_DESC_TYPE(setup->wValue) == DESC_STRING &&
  	    GET_DESC_INDEX(setup->wValue) == USB_OSDESC_STRING_DESC_INDEX) {
  		LOG_DBG("MS OS Descriptor string read");
  		*data = os_desc->string;
  		*len = os_desc->string_len;
  
  		return 0;
  	}
  
  	return -ENOTSUP;
  }
  
  int usb_handle_os_desc_feature(struct usb_setup_packet *setup,
  			       s32_t *len, u8_t **data)
  {
  	LOG_DBG("bRequest 0x%x", setup->bRequest);
  
  	if (!os_desc) {
  		return -ENOTSUP;
  	}
  
  	if (setup->bRequest == os_desc->vendor_code) {
  		switch (setup->wIndex) {
  		case USB_OSDESC_EXTENDED_COMPAT_ID:
  			LOG_DBG("Handle Compat ID");
  			*data = os_desc->compat_id;
  			*len = os_desc->compat_id_len;
  
  			return 0;
  		default:
  			break;
  		}
  	}
  
  	return -ENOTSUP;
  }
  
  /* Register MS OS Descriptors version 1 */
  void usb_register_os_desc(struct usb_os_descriptor *desc)
  {
  	os_desc = desc;
  }
  
  bool usb_os_desc_enabled(void)
  {
  	return !!os_desc;
  }
  