Dennis HilkLinux diagnosticsDE

USB controllers & peripherals

PCI XHCI host-controller class

PCI xHCI host controllers expose USB 2 and SuperSpeed topology through one controller family.

Editorial source review: Share public profileOpen in the identification tool
On this page
  1. Overview & identity
  2. Driver & binding
  3. Firmware
  4. Read-only diagnostics
  5. Limitations & related issues
  6. References

Overview & identity

The PCI programming interface 0c0330 identifies an xHCI controller class, not a retail motherboard, port generation or add-in card.

This is an explicit class, transport or driver-context profile. It is not an exact numeric product match.

A numeric match establishes a candidate family within the reviewed evidence. Marketing names, board variants, subsystem conditions and successful operation remain separate questions.

Driver & binding

The checked xHCI PCI driver matches this class and creates separate USB 2 and USB 3 root hubs. Multiple bus entries can therefore belong to one PCI function; the peripheral interface still has its own driver.

  • xhci_pci — kernel driver/module candidate
  • xhci_hcd — kernel driver/module candidate

Detected, bound, operational: learn the difference

Firmware

Device/revision dependent

No external firmware filename was established in the checked driver path. This does not describe firmware stored inside the device.

Inspect firmware packaging on your distribution

Read-only diagnostics

Run one displayed command at a time. Replace uppercase placeholders with the affected device, interface or module from your own output. Commands are never executed here. Read-only output can still contain private identifiers.

Inspect the PCI function and binding

lspci -nnk -s BDF

Replace BDF with the complete address, for example 0000:00:14.0. This read-only query needs pciutils and normally no sudo. “Kernel driver in use” is observed binding; “Kernel modules” lists candidates.

Inspect interfaces and negotiated speed

lsusb -t

This read-only usbutils query normally needs no sudo. Driver belongs to the displayed interface, while speed is the negotiated connection. Other interfaces of the same physical device may use other drivers.

Limitations & related issues

Topology and negotiated speed do not prove cable quality or every advertised USB feature. Some controller-specific implementations require firmware; this generic profile cannot choose a firmware file.

These guides are linked for relevant observations, not as known defects of every device in this family.

Choose a hardware diagnostic workflow · Inspect a log excerpt in Fix Lab

References

Source review records a checked implementation or document, not a reproduced hardware test. Version-specific tables do not establish a minimum kernel or guaranteed operation.