[PUSB] Made getDescriptor() and setup() more flexible

Alternatively we can only pass the wIndex to getDescriptor but I suggest to just pass the pointer aka reference of the whole setup.
In guess (havent tested this) that this results in more or less the code size but its a) idential with the other functions and b) we late have more flexibility here.
The Code got a quick SerialKeyboard.ino test

Author: NicoHood

hardware/arduino/avr/cores/arduino/PluggableUSB.cpp

@@ -38,23 +38,23 @@ int PluggableUSB_::getInterface(uint8_t* interfaceCount)
 	return sent;
 }
 
-int PluggableUSB_::getDescriptor(int8_t type)
+int PluggableUSB_::getDescriptor(USBSetup& setup)
 {
 	PUSBListNode* node;
 	for (node = rootNode; node; node = node->next) {
-		int ret = node->getDescriptor(type);
+		int ret = node->getDescriptor(setup);
 		// ret!=0 -> request has been processed
 		if (ret)
 			return ret;
 	}
 	return 0;
 }
 
-bool PluggableUSB_::setup(USBSetup& setup, uint8_t interfaceNum)
+bool PluggableUSB_::setup(USBSetup& setup)
 {
 	PUSBListNode* node;
 	for (node = rootNode; node; node = node->next) {
-		if (node->setup(setup, interfaceNum)) {
+		if (node->setup(setup)) {
 			return true;
 		}
 	}

hardware/arduino/avr/cores/arduino/PluggableUSB.h

@@ -35,9 +35,9 @@ class PUSBListNode {
   inline uint8_t endpoint()   const { return pluggedEndpoint; }
 
 protected:
-  virtual bool setup(USBSetup& setup, uint8_t interfaceNum) = 0;
+  virtual bool setup(USBSetup& setup) = 0;
   virtual int getInterface(uint8_t* interfaceCount) = 0;
-  virtual int getDescriptor(int8_t t) = 0;
+  virtual int getDescriptor(USBSetup& setup) = 0;
 
   uint8_t pluggedInterface;
   uint8_t pluggedEndpoint;
@@ -56,8 +56,8 @@ class PluggableUSB_ {
   PluggableUSB_();
   bool plug(PUSBListNode *node);
   int getInterface(uint8_t* interfaceCount);
-  int getDescriptor(int8_t type);
-  bool setup(USBSetup& setup, uint8_t interfaceNum);
+  int getDescriptor(USBSetup& setup);
+  bool setup(USBSetup& setup);
 
 private:
   uint8_t lastIf;

hardware/arduino/avr/cores/arduino/USBCore.cpp

@@ -362,7 +362,7 @@ bool ClassInterfaceRequest(USBSetup& setup)
 		return CDC_Setup(setup);
 
 #ifdef PLUGGABLE_USB_ENABLED
-	return PluggableUSB().setup(setup, i);
+	return PluggableUSB().setup(setup);
 #endif
 	return false;
 }
@@ -476,7 +476,7 @@ bool SendDescriptor(USBSetup& setup)
 
 	InitControl(setup.wLength);
 #ifdef PLUGGABLE_USB_ENABLED
-	ret = PluggableUSB().getDescriptor(t);
+	ret = PluggableUSB().getDescriptor(setup);
 	if (ret != 0) {
 		return (ret > 0 ? true : false);
 	}