USB class ff: Vendor specific
Vendor Specific Class
| Code | ff |
|---|---|
| Name | Vendor specific |
| Subclasses | 1 |
Frequently asked questions
What is a USB device of class ff (Vendor specific)?
Class ff stands for “Vendor specific”. It has 1 subclasses, for example Vendor Specific Subclass.
Which Linux drivers handle Vendor specific?
In Linux kernel 6.12 no driver binds by this class alone; devices are matched by vendor and device ID instead.
How do I find the class of a USB device?
On Linux, lsusb -v shows the bDeviceClass and bInterfaceClass fields. On Windows it appears in the compatible IDs as USB\Class_FF&SubClass_XX.
Subclasses
| Code | Name | Protocols | Class drivers (Linux) |
|---|---|---|---|
ff:ff | Vendor Specific Subclass | ff Vendor Specific Protocol |