3 extra driver need to develop for GTA03

Michael Shiloh michael at openmoko.org
Thu May 29 08:33:12 CEST 2008

Mike (mwester) wrote:
> andrzej zaborowski wrote:
> ...
>> In terms of bottlenecks I'm sure the muxer is not one, neither is the
>> gsm module, if you want to use the usual serivces (GPRS/EDGE).  I
>> think Harald did post some numbers from his experience in A780 project
>> where they actually have a working kernel-side TS0710 implementation
>> (written in a very A780 centric way unfortunately) including bit rates
>> at which the muxer potentially starts to be the bottleneck.  Below
>> that it's just some wasted cycles from going to userspace and back
>> more than necessary.
> The Linux serial driver is an abomination in itself (the only saving 
> grace is that it's largely compatible back to the days of the ASR33 
> teletype machine). IMO, if performance is the goal, we need to consider 
> a custom high-speed serial driver for the UART connected to the GSM, one 
> that gets rid of the overhead of the entire tty layer in the kernel.

I used to own an ASR33. How would I use it with my Neo if we accept your 



p.s. it would have been quite a sight, an ASR33 connected via a Neo, 
happily typing away with that wonderful sound only Teletypes can make...

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