On Tuesday 16 March 2010 14:02:56 Mike McCarty wrote:
> Obviously, UHCI is necessary. However, what about the devices simply
> listed as USB 2.0 (rev xx) where xx is either 65 or 82? They are
> seemingly not the same devices as the UHCI USB 1.1, as the USB
> "level" shows. However, the required protocol is not given.
OHCI/UHCI is for 1.1 usb 2.0 should use EHCI. I'm quoting from kernel menu:
EHCI controllers are packaged with "companion" host controllers (OHCI
or UHCI) to handle USB 1.1 devices connected to root hub ports. Ports
will connect to EHCI if the device is high speed, otherwise they
connect to a companion controller. If you configure EHCI, you should
probably configure the OHCI (for NEC and some other vendors) USB Host
Controller Driver or UHCI (for Via motherboards) Host Controller
Driver too.
If you can run lspci -v from a running known 'good' configuration you should
get some usefule info, too.
00:1a.7 USB Controller: Intel Corporation 82801H (ICH8 Family) USB2 EHCI
Controller #2 (rev 02) (prog-if 20
[EHCI])
Subsystem: Dell Device 022f
Flags: bus master, medium devsel, latency 0, IRQ 22
Memory at fed1c400 (32-bit, non-prefetchable) [size=1K]
Capabilities: <access denied>
Kernel driver in use: ehci_hcd
Kernel modules: ehci-hcd
--
Regards,
Trent.
--
http://linuxfromscratch.org/mailman/listinfo/blfs-support
FAQ: http://www.linuxfromscratch.org/blfs/faq.html
Unsubscribe: See the above information page
