Usb - ADLINK Technology COM Express Express-BL User Manual

7.3.5.

USB

Feature
USB Module Version
USB Devices
Legacy USB Support
USB3.0 Support
XHCI Hand-off
EHCI Hand-off
USB Mass Storage Driver Support
PCH USB Configuration
USB hardware delays and time-outs:
USB transfer time-out
Device reset time-out
Device power-up delay
Mass Storage Devices
7.3.5.1. USB > PCH USB Configuration
Feature
USB Precondition
XHCI Mode
BTCG
USB Precondition
USB Port #0~13
USB30 Port #0~5
Page 62
Options Description
Info only
Info only X Drive, X Keyboards, X Mouse, X Hubs
Enabled Enables legacy USB support.
Disabled Auto option disables legacy support if no USB devices are
connected.
Auto
Disable option will keep USB devices available only for EFI
applications and setup.
Enabled Enable/Disable USB3.0 (XHCI) Controller Support.
Disabled
Enabled This is a workaround for OSes without XHCI hand-off support. The
XHCI ownership change should be claimed by the XHCI OS driver.
Disabled
Enabled This is a workaround for OSes without EHCI hand-off support. The
EHCI ownership change should be claimed by the EHCI OS driver.
Disabled
Enabled Enable/Disable USB Mass Storage Driver Support.
Disabled
Submenu
Info only
1 sec The time-out value for Control, Bulk, and Interrupt transfers
5 sec
10 sec
20 sec
10 sec USB mass storage device Start Unit command time-out.
20 sec
30 sec
40 sec
Auto Maximum time the device will take before it properly reports itself to
the Host Controller. 'Auto' uses default value: for a Root port it is 100
Manual
ms, for a Hub port the delay is taken from Hub descriptor.
Info only List current USB max stroge device.
Options
Disabled
Enabled
Disabled
Enabled
Disabled
Enable
Disabled
Enabled
Disabled
Enabled
Disabled
Enabled
Description
Precondition work on USB host controller and root ports for
faster enumeration.
Mode of operation of xHCI controller.
Enable/Disable trunk clock gating.
Precondition work on USB host controller and root ports for
faster enumeration.
Control each of the USB ports (0~13) disabling.
Enable or Disable USB 3.0 Port.