Samsung Chromebook & USB OTG

[Arthur Vark]

Is the USB 2 or 3 port on the Samsung Chromebook USB OTG capable? Is the USB gadget driver (http://www.linux-usb.org/gadget/) compiled into the kernel?

[Mike Frysinger]

you can find specs on the hardware:
http://www.samsung.com/global/business/semiconductor/product/application/detail?productId=7668

as for the software config, we don't include it in the default build
for any device currently.

in the kernel tree, you can check the configs we use yourself:
$ grep OTG chromeos/ -r
chromeos/config/base.config:# CONFIG_USB_OTG is not set
chromeos/config/base.config:# CONFIG_USB_OTG_BLACKLIST_HUB is not set
chromeos/config/base.config:# CONFIG_USB_OTG_WHITELIST is not set
-mike

On Thu, Dec 27, 2012 at 7:12 PM, Arthur Vark <arthu...@gmail.com> wrote:
> Is the USB 2 or 3 port on the Samsung Chromebook USB OTG capable? Is the USB
> gadget driver (http://www.linux-usb.org/gadget/) compiled into the kernel?
>

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> View archives, change email options, or unsubscribe:
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[Arthur Vark]

Thanks for the answer! I see that the Exynos chip can do either mode, but it could be that the Chromebook USB connectors are wired in an incompatible way.

I am interested in implementing a kind of Target Disk Mode for the Chromebook via USB 3.0 (or USB 2.0 if USB 3.0 cannot work).

Do you know who might know more details about the Chromebook's USB 2.0 port's OTG capabilities? And the dual-mode capabilities of the USB 3.0 port?

[Eric Cyb]

There is a target disk mode since kernel 3.5, see here:
http://superuser.com/questions/468541/how-can-i-use-target-mode-in-linux-with-usb

I don't think you need special hardware.
As long as you have USB host, it is doable.

Did anyone try the target mode?

[Olof Johansson]

Hardware-wise, the port capable of OTG is the 2.0 port on the back of the Chromebook, but we don't enable any software for OTG; it's only used as a host port. Using it for OTG is completely unsupported.

-Olof

2013/1/10 Arthur Vark <arthu...@gmail.com>

Thanks for the answer! I see that the Exynos chip can do either mode, but it could be that the Chromebook USB connectors are wired in an incompatible way.

I am interested in implementing a kind of Target Disk Mode for the Chromebook via USB 3.0 (or USB 2.0 if USB 3.0 cannot work).

Do you know who might know more details about the Chromebook's USB 2.0 port's OTG capabilities? And the dual-mode capabilities of the USB 3.0 port?

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