| 12345678910111213141516171819202122232425 |
- What: /sys/bus/pci/drivers/xhci_hcd/.../dbc
- Date: June 2017
- Contact: Lu Baolu <baolu.lu@linux.intel.com>
- Description:
- xHCI compatible USB host controllers (i.e. super-speed
- USB3 controllers) are often implemented with the Debug
- Capability (DbC). It can present a debug device which
- is fully compliant with the USB framework and provides
- the equivalent of a very high performance full-duplex
- serial link for debug purpose.
- The DbC debug device shares a root port with xHCI host.
- When the DbC is enabled, the root port will be assigned
- to the Debug Capability. Otherwise, it will be assigned
- to xHCI.
- Writing "enable" to this attribute will enable the DbC
- functionality and the shared root port will be assigned
- to the DbC device. Writing "disable" to this attribute
- will disable the DbC functionality and the shared root
- port will roll back to the xHCI.
- Reading this attribute gives the state of the DbC. It
- can be one of the following states: disabled, enabled,
- initialized, connected, configured and stalled.
|
