Essential accessories for portable computing including notebook computer cases, security devices, PDA/Handheld accessories and more! Targus Ghost Device Removal Utility for Windows (v.2.00.004) – October 2018 Other Name Targus Audio/Video Configuration Utility for Windows (v.2.02.005) – May 2018. Targus Ghost Device Removal Utility for Windows (v.2.00.004) – October 2018 Other Name Targus Audio/Video Configuration Utility for Windows (v.2.02.005) – May 2018.
If the system requires ACPI BIOS changes to accurately reflect the USB port configuration, you should consider the user's ability to connect a device to the port when you configure the port.
If you use ACPI to specify the configuration of a USB port, you must define the USB port capabilities (_UPC) and physical location description (_PLD) objects. Although the ACPI 6.0 specification does not specifically prohibit the use of only the _UPC object, the use of both objects more precisely indicates the user's ability to connect devices to the port. Using only the _UPC object might not set the device container grouping correctly or as expected.
Devices that are attached to the port are removable from the hub if the DeviceRemovable bit is set. The following table shows how the values of the ACPI objects for a given port affect the value of the USB hub descriptor DeviceRemovable bit that Windows reports for the device.
|USB Port Status||Example||_UPC.PortIsConnectable byte||_PLD.UserVisible bit (bit 64)||Resulting DeviceRemovable Bit Value|
Port is visible and the user can freely connect and disconnect devices.
Port is exposed on the face of a panel on the computer that is visible to the user.
Port is hidden or internal and user cannot freely connect and disconnect devices.
Port is directly hard-wired to an integrated device, such as a laptop webcam or an internal USB hub.
Port is physically implemented by the USB host controller, but is not used.
Port is an excess port that is not connected to a port plug terminal or an integrated device.
Note It is an invalid configuration to define a port as not connectable but visible to the user.
The following examples show correctly formed ACPI Source Language (ASL) that demonstrates the use of the _UPC and _PLD objects to describe a USB port:
To specify a port that is internal (not user visible) and can be connected to an integrated device, the _UPC.PortIsConnectable byte must be set to 0xFF and the _PLD.UserVisible bit must be set to 0.
In the following example the device is grouped with the computer's device container.
To specify a port that is external (user visible) and can be connected to an external device, the _UPC.PortIsConnectable byte must be set to 0xFF and the _PLD.UserVisible bit must be set to 1. The _UPC.PortConnectorType byte must be set to the appropriate USB connector type as specified in Section 9.13 of the ACPI 3.0 specification.
In the following example the device is assigned a new device container and is displayed as a separate physical device.
A USB Type-C connector must be correctly described in ACPI in order to pass the USB Type-C ACPI Validation Hardware Lab Kit test.
Drivers Targus Group Int Port Devices Lucie
Example _UPC for a USB Type-C connector:
Drivers Targus Group Int Port Devices Inc
For more information about the ACPI 6.0 interface, see Advanced Configuration and Power Interface Specification Revision 6.0.