ADLINK Technology COM Express cExpress-BL User Manual page 58

Feature
USB Module Version
USB Devices
Legacy USB 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. Advanced > USB > PCH USB Configuration
Feature
USB Precondition
XHCI Mode
XHCI Idle L1
BTCG
USB Ports Per-Port Disable Control
7.3.6. Advanced > Network
Page 58
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 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 ms, for a
Manual
Hub port the delay is taken from Hub descriptor.
Info only List current USB max stroge device.
Options Description
Disable Precondition work on USB host controller and root ports for faster
enumeration.
Enable
Smart Auto Mode of operation of xHCI controller.
Auto
Enable
Disable
Manial
Enabled Enable or disable XHCI Idle L1.\n XhciIdleL1 can be set to disable for LPT-
Disabled LP Ax stepping to workaround USB3 hot plug will fail after 1 hot plug
removal.
Disable Enable / Disable trunk clock gating.
Enable
Disable Control each of the USB ports (0~13) disabling.
Enable