htc: implement mux side of connecting (and more)

libraries/libstratosphere/source/htclow/driver/htclow_driver_manager.cpp

@@ -55,6 +55,20 @@ namespace ams::htclow::driver {
         return ResultSuccess();
     }
 
+    void DriverManager::CloseDriver() {
+        /* Lock ourselves. */
+        std::scoped_lock lk(m_mutex);
+
+        /* Clear our driver type. */
+        m_driver_type = std::nullopt;
+
+        /* Close our driver. */
+        if (m_open_driver != nullptr) {
+            m_open_driver->Close();
+            m_open_driver = nullptr;
+        }
+    }
+
     impl::DriverType DriverManager::GetDriverType() {
         /* Lock ourselves. */
         std::scoped_lock lk(m_mutex);
@@ -69,6 +83,10 @@ namespace ams::htclow::driver {
         return m_open_driver;
     }
 
+    void DriverManager::Cancel() {
+        m_open_driver->CancelSendReceive();
+    }
+
     void DriverManager::SetDebugDriver(IDriver *driver) {
         m_debug_driver = driver;
         m_driver_type  = impl::DriverType::Debug;