oFono gets multiplexer support

oFono gets multiplexer support

[Denis Kenzior]

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Hi All,

Just to let you know the initial support for multiplexing has been added to 
oFono.  The multiplexer infrastructure is fully customizable through the use 
of drivers.  Two drivers are currently supported, GSM 27.010 Basic and 
Advanced modes.

The multiplexer is implemented in gatmux in the gatchat library.  GAtMux 
provides a simple interface, and returns a fully functional GIOChannel for 
each multiplexer port.  Thus it can easily be integrated with the existing 
GAtChat functionality, or used to read / write raw information (e.g. ppp 
frames)

This will allow oFono to implement everything in the main oFono process, and 
not resort to a separate multiplexer daemon.  The calypso modem plugin has 
been updated to take advantage of 4 multiplexer channels.

Regards,
-Denis

RE: oFono gets multiplexer support

[Bastian, Waldo]

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> Hi All,
> 
> Just to let you know the initial support for multiplexing has been added
> to oFono.  The multiplexer infrastructure is fully customizable through
> the use of drivers.  Two drivers are currently supported, GSM 27.010 Basic
> and Advanced modes.

Is it a correct understanding that modem's that provide kernel drivers that provide multiple TTY's and do the multiplexing in kernel space will not need to integrate with any of this and can just create multiple GAtChat objects in their oFono modem driver?

I notice that g_at_mux_create_channel() doesn't take a DLC as argument. So when the calypso driver defines
	#define VOICE_DLC 0
the result will be that DLC 1 will be used for VOICE_DLC, correct?

Cheers,
Waldo

Re: oFono gets multiplexer support

[Denis Kenzior]

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Hi Waldo,

> Is it a correct understanding that modem's that provide kernel drivers that
> provide multiple TTY's and do the multiplexing in kernel space will not
> need to integrate with any of this and can just create multiple GAtChat
> objects in their oFono modem driver?

If the modem driver can take advantage of a kernel space multiplexer, that is 
fine.

>
> I notice that g_at_mux_create_channel() doesn't take a DLC as argument. So
> when the calypso driver defines #define VOICE_DLC 0
> the result will be that DLC 1 will be used for VOICE_DLC, correct?

The real assignment of DLC channels is done inside GAtMux.  What you see in 
the driver is unrelated, but most likely will work like you outline by magic 
:)

Regards,
-Denis