On 02/15/2012 04:35 PM, Bruce Ashfield wrote:
On 12-02-15 06:20 PM, Hollis Blanchard wrote:
On 02/14/2012 10:24 PM, McClintock Matthew-B29882 wrote:
On Tue, Feb 14, 2012 at 4:12 PM, Hollis Blanchard
<hollis_blanch...@mentor.com> wrote:
Hi, I'm sure I'm missing something simple, but I just built Poky from
git
for beagleboard, and can't figure out USB networking. I expected to
find
g_cdc and g_ether modules in
/lib/modules/3.0.18-yocto-standard+/kernel/drivers/usb, but that
directory
doesn't actually exist (I guess the drivers are built-in to this
kernel).
I have MACHINE ??= beagleboard in local.conf, and "bitbake
core-image-minimal" did produce a working kernel, uboot, etc. I see
some USB
messages at boot (see below), but although cdc_ether is mentioned,
ifconfig
-a lists only loopback.
Any suggestions? Thanks!
You can look at the default defconfig to see which kernel modules are
selected and also make sure the kernel modules are actually included
on core-image-minimal.
Right, it looks like CONFIG_USB_ETH is disabled in
linux-beagleboard-standard-build/.config , and I think that's the key
missing option. I'm so lost in Yocto's kernel configuration
"architecture" that I have no idea if that's being explicitly disabled,
or just omitted from the base config, or what.
Is this the 3.0 variant ? That particular option wasn't enabled (most
likely because no one had the right device to test it). But that's not
the point, we can absolutely and easily enable it .. in particular
if someone confirms that it works :)
Yes, it's (apparently) a 3.0.18 kernel. I'd be happy to test it.
It seems to me that option should be enabled if DISTRO_FEATURES contains
usbgadget. More simply, it seems like a good idea to enable
CONFIG_USB_ETH in the beagleboard default configuration, since many
beagleboards don't have any other network interface.
The ethernet issue(s) are a painful memory of last year's ELC demos and
plenty of swearing about USB ethernet that didn't detect due to
particular
USB hubs.
I don't think I can do anything about that. :)
We can trigger the inclusion of a particular config option or fragment
directly from a distro feature as well.
Matt's clues may have helped me decipher enough to create a
features/usb-gadget fragment. AFAICS, that can't be controlled by
bitbake variables... but it would be enough for me. :)
The next issue is something to auto-load the g_ether module at boot. It
looks like there's no shortage of init scripts developed for this
purpose in different OE distributions, but none of them are installed in
Yocto's Beagleboard build...
Is there an owner of Yocto's beagleboard BSP stuff?
I can help. Sorry that I missed your first email, traveling to ELC
filled up my inbox with a backlog.
No worries, I knew it was a bad time to ask... thanks!
Hollis Blanchard
Mentor Graphics, Embedded Systems Division
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