Re: Palm Pre modem plugin

[Marcel Holtmann <marcel@holtmann.org>]

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Hi Andrzej,

> > I am currently working on the implementation of
> > the basics I found out about the protocol. I split the whole code into
> > two projects: msmcommd and libmsmcomm. msmcommd is a daemon which does
> > all the link layer protocol handling which is required to speak probably
> > with the modem. The library libmsmcomm is an easy utilitiy to format
> > the different messages type and decode them on receive.
> >
> > The link layer part is nearly done. Establishment of a link should work
> > and on the handling of sending and receiving data I am currently
> > working.
> >
> > When libmsmcomm and msmcommd are done I have the plan to open from
> > fsogsmd a network channel to msmcommd and send all my telephony commands
> > to msmcommd whichs put them into link layer frames and sends them to the
> > modem.
> 
> I like the idea of libmsmcomm as a library, this means it may be easy
> in the future to make an oFono plugin linked against the library.  I
> don't think having a separate daemon and another communication channel
> between what is eventually a dialer or sms app, and the modem is such
> a good idea (with the D-Bus socket, D-Bus daemon, FSO and serial
> driver already there)

I do think that a native integration directly into the oFono source code
as msmmodem might be better. However the second daemon solution is
stupid and causes too much overhead.

Also I did look into the QMI stuff a little bit and I think we might
have to actually create a QMI subsystem in the Linux kernel like we have
for Phonet since with USB the network interface and the management
interface do share endpoints as far as I can tell so far.

Regards

Marcel