On Sun, 3 Sep 2006, Robert Grasso wrote:
> Hello,
>
> I upgraded to the latest official Mandriva kernel : 2.6.12-25mdk.
> After having enabled CONFIG_USB_DEBUG and generated a new kernel, I did not
> get much more informations;
> what puzzles me, is that uhci_hcd does not even discover the USB 1.1 added
> component ? could it be related to
> the tag "SERIAL_SSA" (see my first post) : the driver could guess that it is
> a SSA device and not a USB one ?
I don't know what the "SERIAL_SSA" is doing there. Here's how you can
find out exactly how the devices on the PCI card are identified: Run
"lsusb -nvx -s 02:0a.0" (use 02:0a.1 or 02:0a.2 for the second and third
controllers).
Here's what I get from an equivalent command on my laptop:
00:07.2 Class 0c03: 8086:7112 (rev 01)
Flags: bus master, medium devsel, latency 32, IRQ 11
I/O ports at dce0 [size=32]
00: 86 80 12 71 05 00 80 02 01 00 03 0c 00 20 00 00
10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
20: e1 dc 00 00 00 00 00 00 00 00 00 00 00 00 00 00
30: 00 00 00 00 00 00 00 00 00 00 00 00 0b 04 00 00
Your results will differ in detail. What matters is the class value on
the first line and the numbers on the 00: line. Class 0c03 is a USB
controller. (Class 0c02 is a Serial SSA device.) Those numbers are
duplicated in positions 12 and 11 on the data line:
00: 86 80 12 71 05 00 80 02 01 00 03 0c 00 20 00 00
^ ^ ^
Programming interface----------+ +--+---- Subclass and class
The number before the subclass (03) is the programming interface (00).
For USB controllers, the interface is 00 for UHCI, 10 for OHCI, and 20 for
EHCI.
If those values aren't what they should be then the card is defective. Or
it's not a USB controller at all.
If the values are correct then something is wrong in the kernel, but it's
probably not in the USB portion. More likely it's in the PCI part, or
else maybe some special quirk is needed for your motherboard.
Alan Stern
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