USB_FOR_EACH_DEV(9) USB Core APIs USB_FOR_EACH_DEV(9)NAME
usb_for_each_dev - iterate over all USB devices in the system
int usb_for_each_dev(void * data, int (*fn) (struct usb_device *, void *));
data pointer that will be handed to the callback function
callback function to be called for each USB device
Iterate over all USB devices and call fn for each, passing it data. If it returns anything other than 0, we break the iteration prematurely
and return that value.
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 USB_FOR_EACH_DEV(9)
Check Out this Related Man Page
EHCI(4) BSD Kernel Interfaces Manual EHCI(4)NAME
ehci -- USB Enhanced Host Controller driver
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 ohci(4), uhci(4), usb(4)HISTORY
The ehci device driver first appeared in FreeBSD 5.1.
The driver is not finished and is quite buggy.
There is currently no support for isochronous transfers.
BSD March 20, 2005 BSD
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