Further fixes and TI Calypso Engineering Mode

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Hi Andrzej,
 Thanks for your patches.   

andrzej zaborowski 提到:
> Hi,
>   I committed some fixes that may be useful, to the git tree at
> http://folks.o-hand.com/andrew/gsmd.git to account for some issues
> found by Thomas Wood when hacking openmoko-dialer2:
>
> id 56535ca5e8d1798232c33fee5b377b2cbd2cda49 adds keeping track of
> current registration state internally in gsmd. Without this the
> "gsmd->dev_state.registered" variable had bogus values.
>
> id 2348a36aab65548915c098866ce6584d564d9a47 avoids reissuing the
> network initialisation commands (the ones that are issued after we
> successfully register) excessively everytime the registration state
> changes, for example when we merely moved to a different cell. Some
> unrelated miscellaneous fixes too.
>
It's seem great.  I'll take look into these patches asap.
> id 969ef13d8850eae854af9ea4c9a228c226741db2 tries harder to make sure
> that incoming calls are rejected when the dialer requests this. I
> don't know if this change is enough. Thomas has hit this issue
> yesterday.
I can reject incoming call with current gsmd on SVN,
I am wondering what problem Thomas meet yesterday?
> Unrelated to this, I added some information about some additional
> proprietary commands that TI Calypso seems to support to the
> http://wiki.openmoko.org/wiki/GTA01_gsm_modem page. Among them there's
> %EM (engineering mode) which lets you do some pretty cool things with
> the modem, for example tells you what other cells are in range
> (besides your currently serving cell), their IDs and the strength of
> signal coming from each of them. IIRC there was some discussion about
> this capability earlier on this list, and there was an idea to use
> this information (if available) for making a global map of cell IDs
> for easy geolocation.
Ya.. Engineer mode is some what important.
I think this support should be done in the future. (To-Do)
>
> Cheers,
> Andrew
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