usb: Structure definitions for USB device descriptors

src/include/86box/usb.h

@@ -107,6 +107,34 @@ typedef struct
     uint8_t bDescriptorType;
 } usb_desc_base_t;
 
+typedef struct
+{
+    usb_desc_base_t base;
+
+    uint8_t bInterfaceNumber;
+    uint8_t bAlternateSetting;
+    uint8_t bNumEndpoints;
+    uint8_t bInterfaceClass;
+    uint8_t bInterfaceSubClass;
+    uint8_t bInterfaceProtocol;
+    uint8_t iInterface;
+} usb_desc_interface_t;
+
+typedef struct
+{
+    usb_desc_base_t base;
+    uint8_t bEndpointAddress;
+    uint8_t bmAttributes;
+    uint8_t wMaxPacketSize;
+    uint8_t bInterval;
+} usb_desc_endpoint_t;
+
+typedef struct
+{
+    usb_desc_base_t base;
+    uint16_t bString[];
+} usb_desc_string_t;
+
 typedef struct
 {
     usb_desc_base_t base;
@@ -117,6 +145,8 @@ typedef struct
     uint8_t  iConfiguration;
     uint8_t  bmAttributes;
     uint8_t  bMaxPower;
+    
+    usb_desc_interface_t interface_descs[];
 } usb_desc_conf_t;
 
 #pragma pack(pop)