Re: [gentoo-user] Which USB device on which controller?

[Dale]

Grant wrote:
>>> My system seems to have 2 USB controllers, one 1.1 controller (OHCI)
>>> and one 2.0 controller (EHCI):
>>>
>>> 00:02.0 USB Controller: nVidia Corporation MCP61 USB Controller (rev
>>> a3) (prog-if 10 [OHCI])
>>>       Subsystem: Micro-Star International Co., Ltd. Device 7309
>>>       Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 21
>>>       Memory at dfe7f000 (32-bit, non-prefetchable) [size=4K]
>>>       Capabilities: [44] Power Management version 2
>>>       Kernel driver in use: ohci_hcd
>>>
>>> 00:02.1 USB Controller: nVidia Corporation MCP61 USB Controller (rev
>>> a3) (prog-if 20 [EHCI])
>>>       Subsystem: Micro-Star International Co., Ltd. Device 7309
>>>       Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 22
>>>       Memory at dfe7ec00 (32-bit, non-prefetchable) [size=256]
>>>       Capabilities: [44] Debug port: BAR=1 offset=0098
>>>       Capabilities: [80] Power Management version 2
>>>       Kernel driver in use: ehci_hcd
>>>
>>> I have 2 Philips USB webcams attached to this system and controlled by
>>> media-video/motion.  One of the webcams is not functioning, and I'm
>>> supposed to make sure I don't have both of them attached to the USB
>>> 1.1 controller.  How can I do that?  I have:
>>>
>>> # lsusb
>>> Bus 001 Device 003: ID 04f9:002a Brother Industries, Ltd
>>> Bus 001 Device 001: ID 1d6b:0002
>>> Bus 002 Device 003: ID 0471:0329 Philips
>>> Bus 002 Device 002: ID 0471:0329 Philips
>>> Bus 002 Device 001: ID 1d6b:0001
>>>
>>> Is there any way to find out?
>>>
>>> - Grant
>>>
>>>
>>>
>>>
>> I !think! mine has that too.  This is the usb part of my config:
>>
>> root@smoker / # cat /usr/src/linux/.config | grep USB | grep =y
>> CONFIG_USB_HID=y
>> CONFIG_USB_SUPPORT=y
>> CONFIG_USB_ARCH_HAS_HCD=y
>> CONFIG_USB_ARCH_HAS_OHCI=y
>> CONFIG_USB_ARCH_HAS_EHCI=y
>> CONFIG_USB=y
>> CONFIG_USB_DEVICEFS=y
>> CONFIG_USB_OHCI_HCD=y
>> CONFIG_USB_OHCI_LITTLE_ENDIAN=y
>> CONFIG_USB_ACM=y
>> CONFIG_USB_PRINTER=y
>> CONFIG_USB_STORAGE=y
>> root@smoker / #
>>
>> With mine, it tries 2.0 first then goes to the first version.  My
>> printer is 2.0 but my camera is the old version, or maybe it is the
>> other way around.  I got a memory stick that connects 2.0 to.  Anyway,
>> that works here and it may work for you.
>>
>> Dale
>>
>
> So it doesn't matter which slots the webcams are plugged into?
>
> - Grant
>
>
>

I'm not 100% sure of this but I think it will try to connect sort of
like a IDE drive or even a old dial-up modem does.  It just tries to use
the fastest speed it can get a stable connect at.  It appears to try the
new faster version first but if that doesn't work it switches to the
slower speed and tries that.  Because of my hardware, I have to use both
on mine since some can only use the slow speed and some can use the high
speed.

As far as the actual connector itself, I'm pretty sure it doesn't matter
at all.  It's one chip that controls it all anyway.  Just like the PCI
bus, it has one chip and that's it.  I know I have switched my printer
and camera around several times and it works the same no matter how I
connect it.

Now if you have the new version USB with everything hardware wise, you
may be able to disable the old version so that it has no option but to
use the new fast one.  That way you can get the fast speed or a error
message that it isn't working.  Keep in mind tho, if you have a junky
cable, it will limit the speed a LOT.  My printer would not use the new
fast version with a older cable.  It does with the new cable tho.  My
camera just plain don't work with the new version no matter what.  You
may want to get a good quality cable to test with too.

Someone correct me if I am off base here.

Dale

:-)  :-)