GTA02 USB and battery current profile

Andy Green andy at openmoko.com
Sun Mar 9 16:07:32 CET 2008


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Somebody in the thread at some point said:
> On Sun, Mar 09, 2008 at 11:45:09AM -0300, Werner Almesberger wrote:
>> Felipe Balbi wrote:
>>> Just passed through my mind this idea, it would be nice to popup the
>>> user about which module to use, like when you attach an Nseries nokia
>>> phone to your pc, it asks "Pc-suite, Data transfer". How about that ?
>> Please send patches :-)
> 
> That would be done in userspace :-p
> Are you guys using HAL?
> 
> You could install a hall-addon to check whether vbus is active and
> whether the cable attached is mini-b. If both are true this means we're
> attached as peripheral and instead of just starting g_ether (which is
> now statically linked to the kernel) you popup a screen for the user
> to choose.
> 
> This means, g_ether and g_file_storage should be modules not statically
> linked to kernel.

What we need before this is a plan for the dynamic host / gadget
switching in the kernel.  We can poll the USB ID to find if it is
grounded, floating, or with the "1A" charger... then what do we do if we
find the situation changed?

- -Andy

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