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Manual Pages  — FWOHCI


fwohci – OHCI FireWire chipset device driver



To compile this driver into the kernel, place the following line in your kernel configuration file: device firewire

Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):


To disable physical access (see BUGS section for detail), put the following line in loader.conf(5):



The fwohci driver provides support for PCI/CardBus FireWire interface cards. The driver supports the following IEEE 1394 OHCI chipsets:


firewire(4), fwe(4), fwip(4), sbp(4), fwcontrol(8), kldload(8)


The fwohci device driver first appeared in FreeBSD 5.0 .


The fwohci device driver was written by Katsushi Kobayashi and Hidetoshi Shimokawa.


The driver allows physical access from any nodes on the bus by default. This means that any devices on the bus can read and modify any memory space which can be accessed by an IEEE 1394 OHCI chip. It is allowed mostly for sbp(4) devices. This should be changed to allow it only for specific devices. Anyway, FireWire is a bus and not expected to be connected with un-trustable devices because a node can monitor all the traffic.

FWOHCI (4) March 3, 2008

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