[usb] Remove handling of OutTransfer/SetupTransaction completed.

Change-Id: I211f31be71a3ccc36ec33ec80b35513a1ff6943d

ion/src/device/regs/otg.h

@@ -56,8 +56,8 @@ public:
     enum class PKTSTS {
       GlobalOutNAK = 1,
       OutReceived = 2,
-      OutTransferCompleted = 3,
-      SetupTransactionCompleted = 4, // TODO when sniffing the usb traffic, this interrupt is only done once, after the setAdress request receives a first NAK. It does not happen again after unpluggin and replugging the calculator: problem somewhere?
+      OutTransferCompleted = 3, // After each Out Transaction
+      SetupTransactionCompleted = 4, // Supposed to be after each SETUP transaction
       SetupReceived = 6
     };
     REGS_FIELD(EPNUM, uint8_t, 3, 0);

ion/src/device/usb/device.cpp

@@ -24,12 +24,7 @@ void Device::poll() {
     assert(grxstsp.getEPNUM() == 0);
 
     if (pktsts == OTG::GRXSTSP::PKTSTS::OutTransferCompleted || pktsts == OTG::GRXSTSP::PKTSTS::SetupTransactionCompleted) {
-      // Reset the out endpoint
-      m_ep0.setupOut();
-      // Set the NAK bit
-      m_ep0.setOutNAK(m_ep0.NAKForced());
-      // Enable the endpoint
-      m_ep0.enableOut();
+      // There is no data associated with this interrupt.
       return;
     }