missing USB gadget support on beagleboard?

missing USB gadget support on beagleboard?

[Hollis Blanchard]

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!

usbcore: registered new interface driver kaweth
pegasus: v0.6.14 (2006/09/27), Pegasus/Pegasus II USB Ethernet driver
usbcore: registered new interface driver pegasus
usbcore: registered new interface driver asix
usbcore: registered new interface driver cdc_ether
usbcore: registered new interface driver dm9601
usbcore: registered new interface driver smsc75xx
usbcore: registered new interface driver smsc95xx
usbcore: registered new interface driver net1080
usbcore: registered new interface driver cdc_subset
usbcore: registered new interface driver zaurus
usbcore: registered new interface driver MOSCHIP usb-ethernet driver
usbcore: registered new interface driver int51x1
cdc_ncm: 04-Aug-2011
usbcore: registered new interface driver cdc_ncm
console [netcon0] enabled
netconsole: network logging started
ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
_regulator_get: ehci-omap.0 supply hsusb0 not found, using dummy regulator
_regulator_get: ehci-omap.0 supply hsusb1 not found, using dummy regulator
ehci-omap ehci-omap.0: OMAP-EHCI Host Controller
ehci-omap ehci-omap.0: new USB bus registered, assigned bus number 1
ehci-omap ehci-omap.0: irq 77, io mem 0x48064800
ehci-omap ehci-omap.0: USB 2.0 started, EHCI 1.00
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 3 ports detected
Initializing USB Mass Storage driver...
usbcore: registered new interface driver usb-storage
USB Mass Storage support registered.

-- 
Hollis Blanchard
Mentor Graphics, Embedded Systems Division

Re: missing USB gadget support on beagleboard?

[McClintock Matthew-B29882]

On Tue, Feb 14, 2012 at 4:12 PM, Hollis Blanchard
<hollis_blanchard@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.

-M

Re: missing USB gadget support on beagleboard?

[McClintock Matthew-B29882]

On Tue, Feb 14, 2012 at 10:23 PM, Matthew McClintock <msm@freescale.com> wrote:
> 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.

By making sure kernel modules are included... I mean the kernel
recipes creates a kernel-modules package. You can see if it's
generated, what it contains, and then determine if that is actually
whats included on the root file system.

-M

Re: missing USB gadget support on beagleboard?

[Hollis Blanchard]

On 02/14/2012 10:24 PM, McClintock Matthew-B29882 wrote:
> On Tue, Feb 14, 2012 at 4:12 PM, Hollis Blanchard
> <hollis_blanchard@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.

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.

Is there an owner of Yocto's beagleboard BSP stuff?

Hollis Blanchard
Mentor Graphics, Embedded Systems Division

Re: missing USB gadget support on beagleboard?

[McClintock Matthew-B29882]

On Wed, Feb 15, 2012 at 11:20 PM, Hollis Blanchard
<hollis_blanchard@mentor.com> wrote:
> 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.
>
> 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.
>
> Is there an owner of Yocto's beagleboard BSP stuff?

As a stop gap, you can run menuconfig:

bitbake -c menuconfig virtual/kernel
bitbake -c compile virtual/kernel -f

And add the kernel modules you need. The final ideal solution would be
to include a kernel config fragment for this kernel config option by
default for this and possibly other machines.

-M

Re: missing USB gadget support on beagleboard?

[Bruce Ashfield]

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_blanchard@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 :)

>
> 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.

We can trigger the inclusion of a particular config option or fragment
directly from a distro feature as well.

>
> 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.

Bruce

>
> Hollis Blanchard
> Mentor Graphics, Embedded Systems Division
>
> _______________________________________________
> yocto mailing list
> yocto@yoctoproject.org
> https://lists.yoctoproject.org/listinfo/yocto

Re: missing USB gadget support on beagleboard?

[Hollis Blanchard]

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_blanchard@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