Changeset 7788 in vbox for trunk/src/VBox

Timestamp:

Apr 8, 2008 8:48:17 AM (17 years ago)

Author:

vboxsync

Message:

Properly determine USB port version on Windows hosts.

File:

• trunk/src/VBox/Main/HostUSBDeviceImpl.cpp (modified) (1 diff)

trunk/src/VBox/Main/HostUSBDeviceImpl.cpp

@@ -302 +302 @@
     AutoReaderLock alock (this);
 
-    /** @todo implement this correctly or things just won't work right, see the vista defect. */
-    *aPortVersion = mUsb->bcdUSB >> 8;
+    /* Port version is 2 (EHCI) if and only if the device runs at high speed;
+     * if speed is unknown, fall back to the old and innacurate method.
+     */
+    if (mUsb->enmSpeed == USBDEVICESPEED_UNKNOWN)
+        *aPortVersion = mUsb->bcdUSB >> 8;
+    else
+        *aPortVersion = (mUsb->enmSpeed == USBDEVICESPEED_HIGH) ? 2 : 1;
 
     return S_OK;