[LinuxBIOS] USB Support
bari at onelabs.com
Fri Jul 7 23:14:41 CEST 2006
Stefan Reinauer wrote:
> * Peter Stuge <stuge-linuxbios at cdy.org> [060707 19:52]:
>> This is a nice idea.
>> On Fri, Jul 07, 2006 at 04:18:25PM +0200, Stefan Reinauer wrote:
>>>> what you need is a debug device, which mostly looks like a usb
>>>> style null modem cable. No idea where to get this hardware
>>> D'uh - it reads any usb 2 to usb 2 data link cable can be used for
>>> this purpose. Such cables are available for ~ 10$
>> Where did you read this?
>> I doubt they will work, unless the manufacturers were exceedingly
>> clever and actually implemented the DEBUG_MODE feature in the
> You are right. The cable would need to implement the DEBUG_MODE feature.
> I read over page 5 of
> and it actually says so.
> The question is now: what devices/cables can be used for this purpose.
> Or is it maybe trivial to build such a device yourself in a low
>> I'm not sure if this requirement is compatible with the CDC spec that
>> USB-serial adapters implement, but it would indeed be very handy if
>> minicom+the kernel USB-serial driver could be used with the host end
>> of the debug device.
> That would indeed be great!
>> It's quite possible that the device requires a special application,
>> but in any case such an application would be trivial to hack up.
> Or just a small dummy serial driver so minicom or whatever could be
>> I think the hard part is to find or make the hardware. Or maybe not
>> so hard if you have a proven USB2 HS platform and are comfortable
>> with tweaking USB descriptors. All I have handy is USB2 FS. :(
> The idea is probably to get a cost effective solution, otherwise a lot
> of volunteers might get locked out of joining the project.
Let me know what it actually needs (if it needs to be custom) and I'll
see about manufacturing them in low volumes (100's, k's) for cheap.
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