Lines Matching +full:usb2 +full:- +full:companion
1 What: /sys/bus/pci/drivers/ehci_hcd/.../companion
2 /sys/bus/usb/devices/usbN/../companion
7 PCI-based EHCI USB controllers (i.e., high-speed USB-2.0
9 "companion" full/low-speed USB-1.1 controllers. When a
10 high-speed device is plugged in, the connection is routed
11 to the EHCI controller; when a full- or low-speed device
12 is plugged in, the connection is routed to the companion
15 Sometimes you want to force a high-speed device to connect
17 connection to be routed to the companion controller.
20 companion controller, and writing the negative of a port
23 For example: To force the high-speed device attached to
26 echo 4 >/sys/bus/usb/devices/usb2/../companion
28 To return the port to high-speed operation::
30 echo -4 >/sys/bus/usb/devices/usb2/../companion
33 to the companion controller.
37 may be attached directly to a "rate-matching hub". This
39 cannot be used to force a port on a high-speed hub to