Re: USB Host Mode

On 12/20/06, Kevin <lists-rlw6wC9k61x8UrSeD/[email protected]> wrote:
> Thank you list members, and especially Justin for your very detailed replies
> to my several posts.  In spite of Googling and searching list archives and
> so forth, being new to this hardware, I guess I'll be asking a lot of
> questions for awhile yet.
>
> On that note...
>
> Step 1 of:
>
> http://wiki.openzaurus.org/HowTos/UsbEthernetAdapterSupportOnUsbHost
>
> reads:
>
> "make sure that USB host mode is activated"
>
> How do I do that?
>
> When I ask in #zaurus, I get told that I need to go back to the Sharp ROM
> which I suspect is not true.
>

Try #openzaurus.

Do a lsmod after you plug in your host cable and device. See what
modules are running. There are special usb host modules. I believe
udev already has rules in place to take care of this. Then run dmesg
and check its output. If you're over the power limit it *should* say
something.

> With ps aux in a console, I can see a udevd --daemon process running.  Is
> that what is meant in step 2 with "make sure udev is running".  My
> understanding of udev is that it's a kernel process, so if it's not the
> daemon that step is referring to, then i dunno how to make sure it's running
> other than by booting the kernel.
>
> I've done step 3 for my device (the LinkSys USB200M) by installing the mii
> and asix kernel module packages, and did the depmod as per
> http://bugs.openembedded.org/show_bug.cgi?id=871 too.
>
> So the only thing that I'm not clear on is step 1 where I get the machine
> into USB host mode.
>
> I've tried plugging everything in (modules into kernel, host cable into Z,
> NIC into host cable, ethernet cable into NIC), but nothing interesting
> happens, and I do have a DHCP server running on the network.  What should
> the interface be named?  I see a bunch of disconnected interfaces in the
> Settings->Network tool:
>
> bnep0
> usbf
> usbd0
> usb0
> eth1
> eth0
> atml0
> wlan0
> irda0
> sit0
> lo
>
> and I tried manually starting all of them that weren't obviously referring
> to something else like irda0.  The only interface with an IP address in that
> list is lo.
>
> Could it be that I'm over the 150mA current limit?  I don't have a powered
> hub: just this cute little ethernet dongle thingie plugged as described
> above.  No lights on it illuminate in any part of the process above.
>
> Any thoughts?
>


-- 
Justin Patrin

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