change tusb_init(), tusb_rhport_init() to use init struct for expandability

src/common/tusb_common.h

@@ -79,7 +79,7 @@
 
 //--------------------------------------------------------------------+
 // Optional API implemented by application if needed
-// TODO move to a more ovious place/file
+// TODO move to a more obvious place/file
 //--------------------------------------------------------------------+
 
 // flush data cache

src/common/tusb_compiler.h

@@ -118,6 +118,14 @@
 #define _TU_ARGS_APPLY_7(_X, _s, _a1, _a2, _a3, _a4, _a5, _a6, _a7)      _X(_a1) _s _TU_ARGS_APPLY_6(_X, _s, _a2, _a3, _a4, _a5, _a6, _a7)
 #define _TU_ARGS_APPLY_8(_X, _s, _a1, _a2, _a3, _a4, _a5, _a6, _a7, _a8) _X(_a1) _s _TU_ARGS_APPLY_7(_X, _s, _a2, _a3, _a4, _a5, _a6, _a7, _a8)
 
+//--------------------------------------------------------------------+
+// Macro for function default arguments
+//--------------------------------------------------------------------+
+#define TU_GET_3RD_ARG(arg1, arg2, arg3, ...)        arg3
+
+// function expand with number of arguments
+#define TU_FUNC_OPTIONAL_ARG(func, ...)   TU_XSTRCAT(func##_arg, TU_ARGS_NUM(__VA_ARGS__))(__VA_ARGS__)
+
 //--------------------------------------------------------------------+
 // Compiler porting with Attribute and Endian
 //--------------------------------------------------------------------+

src/common/tusb_types.h

@@ -50,6 +50,7 @@ typedef enum {
   TUSB_SPEED_FULL = 0,
   TUSB_SPEED_LOW  = 1,
   TUSB_SPEED_HIGH = 2,
+  TUSB_SPEED_AUTO = 0xaa,
   TUSB_SPEED_INVALID = 0xff,
 } tusb_speed_t;
 
@@ -273,6 +274,15 @@ enum {
   TUSB_INDEX_INVALID_8 = 0xFFu
 };
 
+//--------------------------------------------------------------------+
+//
+//--------------------------------------------------------------------+
+typedef struct {
+  uint8_t rhport;
+  tusb_role_t role;
+  tusb_speed_t speed;
+} tusb_rhport_init_t;
+
 //--------------------------------------------------------------------+
 // USB Descriptors
 //--------------------------------------------------------------------+

src/common/tusb_verify.h

@@ -93,9 +93,6 @@
   #define TU_BREAKPOINT() do {} while (0)
 #endif
 
-// Helper to implement optional parameter for TU_VERIFY Macro family
-#define TU_GET_3RD_ARG(arg1, arg2, arg3, ...)        arg3
-
 /*------------------------------------------------------------------*/
 /* TU_VERIFY
  * - TU_VERIFY_1ARGS : return false if failed