DragonFly On-Line Manual Pages

FWOHCI(4)	      DragonFly Kernel Interfaces Manual	     FWOHCI(4)


fwohci -- OHCI firewire chipset device driver


kldload firewire or device firewire


The fwohci driver provides support for PCI/CardBus firewire interface cards. The driver supports the following IEEE 1394 OHCI chipsets. NEC uPD72861 Texas Instruments TSB12LV{22,23,26}, TSB43{AA22,AB22/A}, PCI44{10A,50} Sony CX3022 VIA VT6306 Ricoh R5C552


firewire(4), fwe(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 con- nected with un-trustable devices because a node can monitor all the traf- fic. DragonFly 4.3 April 10, 2000 DragonFly 4.3