Add WebUSB platform capability support.

Author: whitequark

firmware/library/include/usb.h

@@ -49,6 +49,7 @@ enum usb_descriptor {
   USB_DESC_DEVICE           = 1,
   USB_DESC_CONFIGURATION    = 2,
   USB_DESC_STRING           = 3,
+  USB_DESC_URL              = USB_DESC_STRING,
   USB_DESC_INTERFACE        = 4,
   USB_DESC_ENDPOINT         = 5,
   USB_DESC_DEVICE_QUALIFIER = 6,
@@ -238,6 +239,20 @@ struct usb_desc_string {
 typedef __code const struct usb_desc_string
   usb_desc_string_c;
 
+enum usb_url_scheme {
+  USB_URL_SCHEME_HTTPS = 1,
+};
+
+struct usb_desc_url {
+  uint8_t  bLength;
+  uint8_t  bDescriptorType;
+  uint8_t  bScheme;
+  uint8_t  bURL[];
+};
+
+typedef __code const struct usb_desc_url
+  usb_desc_url_c;
+
 struct usb_desc_binary_object_store {
   uint8_t  bLength;
   uint8_t  bDescriptorType;

firmware/library/include/usbweb.h

@@ -0,0 +1,24 @@
+#ifndef USBWEB_H
+#define USBWEB_H
+
+#include <usb.h>
+
+// {3408b638-09a9-47a0-8bfd-a0768815b665}
+#define USB_PLATFORM_CAPABILITY_UUID_WEBUSB \
+  {0x38, 0xB6, 0x08, 0x34, 0xA9, 0x09, 0xA0, 0x47, 0x8B, 0xFD, 0xA0, 0x76, 0x88, 0x15, 0xB6, 0x65}
+
+struct usb_desc_webusb_platform_capability {
+  uint8_t  bLength;
+  uint8_t  bDescriptorType;
+  uint8_t  bDevCapabilityType;
+  uint8_t  bReserved;
+  uint8_t  PlatformCapablityUUID[16];
+  uint16_t bcdVersion;
+  uint8_t  bVendorCode;
+  uint8_t  iLandingPage;
+};
+
+typedef __code const struct usb_desc_webusb_platform_capability
+  usb_desc_webusb_platform_capability_c;
+
+#endif