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xhci(4) [freebsd man page]

XHCI(4) 						   BSD Kernel Interfaces Manual 						   XHCI(4)

NAME
xhci -- USB eXtensible Host Controller driver SYNOPSIS
device xhci DESCRIPTION
The xhci driver provides support for the USB eXtensible Host Controller Interface, which allows use of USB 1.0, 2.0 and 3.0 devices on the same USB port. The XHCI controller supports USB connection speeds up to 5.0Gbps when using a USB 3.0 compliant device. HARDWARE
The xhci driver supports XHCI compatible controllers having PCI class 12 (serial bus), subclass 3 (USB) and programming interface 48 (XHCI). SEE ALSO
ehci(4), ohci(4), uhci(4), usb(4) HISTORY
The xhci device driver first appeared in FreeBSD 8.2. BSD
May 17, 2011 BSD

Check Out this Related Man Page

EHCI(4) 						   BSD Kernel Interfaces Manual 						   EHCI(4)

NAME
ehci -- USB Enhanced Host Controller driver SYNOPSIS
ehci* at cardbus? function ? ehci* at pci? dev ? function ? usb* at ehci? DESCRIPTION
The ehci driver provides support for the USB Enhanced Host Controller Interface, which is used by USB 2.0 controllers. EHCI controllers are peculiar in that they can only handle the USB 2.0 protocol. This means that they normally have one or more companion controllers (i.e., ohci(4) or uhci(4)) handling USB 1.x devices. Consequently each USB connector is electrically connected to two USB con- trollers. The handling of this is totally automatic, but can be noticed since USB 1.x and USB 2.0 devices plugged in to the same connector appear to connect to different USB busses. SEE ALSO
cardbus(4), ohci(4), pci(4), uhci(4), usb(4) HISTORY
The ehci driver appeared in NetBSD 1.6. BUGS
The support for hubs that are connected with high speed upstream and low or full speed downstream (i.e., for transaction translators) is lim- ited. BSD
Aug 10, 2008 BSD
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