SI/GCAdapter: use origin from controllers

GCAdapter controllers were just inheriting the "perfect" calibration of
the emulated GC controller.

Source/Core/Core/HW/SI/SI.cpp

@@ -660,7 +660,6 @@ static void RunSIBuffer(u64 user_data, s64 cycles_late)
   if (s_com_csr.TSTART)
   {
     u32 request_length = ConvertSILengthField(s_com_csr.OUTLNGTH);
-    u32 expected_response_length = ConvertSILengthField(s_com_csr.INLNGTH);
     std::vector<u8> request_copy(s_si_buffer.data(), s_si_buffer.data() + request_length);
 
     std::unique_ptr<ISIDevice>& device = s_channel[s_com_csr.CHANNEL].device;
@@ -671,9 +670,6 @@ static void RunSIBuffer(u64 user_data, s64 cycles_late)
             EstimateTicksForXfer(1, SI_MICROSECONDS_PER_STOP_BIT) - cycles_late,
         s_get_response_event[s_com_csr.CHANNEL], SiGetMaskForChannel(s_com_csr.CHANNEL));
 
-    INFO_LOG(SERIALINTERFACE,
-             "RunSIBuffer  chan: %d  request_length: %u  expected_response_length: %u",
-             s_com_csr.CHANNEL, request_length, expected_response_length);
     // TODO:
     // Wait a reasonable amount of time for the result to be available:
     //    request is N bytes, ends with a stop bit
@@ -1054,8 +1050,6 @@ void TriggerPoll(s64 cycles_late)
                                   EstimateTicksForXfer(1, SI_MICROSECONDS_PER_STOP_BIT) -
                                   cycles_late,
                               s_poll_get_response_event, user_data);
-
-    INFO_LOG(SERIALINTERFACE, "TriggerPoll: user_data: %x", user_data);
   }
 
   // Polling finished

Source/Core/Core/HW/SI/SI_DeviceGCAdapter.cpp

@@ -64,6 +64,29 @@ int CSIDevice_GCAdapter::RunBuffer(u8* buffer, int request_length)
       return 0;
     }
   }
+  // Read the command
+  EBufferCommands command = static_cast<EBufferCommands>(buffer[0]);
+  switch (command)
+  {
+  case CMD_ORIGIN:
+  {
+    SOrigin origin = {};
+    GCAdapter::origin_data od;
+    GCAdapter::GetOrigin(m_device_number, &od);
+    origin.origin_stick_x = od.stickX;
+    origin.origin_stick_y = od.stickY;
+    origin.substick_x = od.substickX;
+    origin.substick_y = od.substickY;
+    origin.trigger_left = od.triggerL;
+    origin.trigger_right = od.triggerR;
+    u8* calibration = reinterpret_cast<u8*>(&origin);
+    for (int i = 0; i < (int)sizeof(SOrigin); i++)
+    {
+      buffer[i] = *calibration++;
+    }
+    return sizeof(SOrigin);
+  }
+  }
   return CSIDevice_GCController::RunBuffer(buffer, request_length);
 }