Hi Jonas,
On 12/07/2012 12:22 AM, Jonas Bonn wrote:
Hi Denis,
On Tue, 2012-12-04 at 23:55 -0600, Denis Kenzior wrote:
Hi Jonas,
On 12/04/2012 09:46 AM, Jonas Bonn wrote:
In offline state where CFUN=4, the Telit HE910 also powers down the SIM
card so AT commands that query the SIM will fail. These failures result
in ofono not getting to POST_SIM state where it will export the GPRS
feature.
Does the HE910 have a proper CFUN mode where it does not turn off the
SIM? You are making some nasty hacks because of it, and the other Telit
devices support this just fine.
No, the HE910 supports CFUN modes 0,1,4,5,7 where:
1: online
4: offline (airplane) mode with SIM powered off
0,5,7: online w/ power saving modes; SMS and phone calls are active in
these modes, but AT command handling seems to be turned off
See Telit Modules Software User Guide, 1vv0300784 rev 11, 2012-09-20,
section 3.6 (page 105) for a description of these modes.
I read the description of CFUN in that document and got lost rather
quickly. The bottom line is that oFono does not use any serial
signaling, so all of these DTR and RTS conditions do not apply. If the
Telit modems do not support radio off with SIM on, then you need to
structure the driver differently, most likely removing the 'online'
method implementation would do what you want, and use only
enable/disable. In theory that should work putting the modem online as
soon as the sim is in the ready state.
Better yet, ask Telit to fix their firmware and document what the <rst>
parameter to CFUN actually means.
This patch changes the Telit driver so it will not go immediately
to CFUN=4 after enable, but to wait for the post_sim state to be
reached before doing so. In addition, the HE910 might send QSS: 0
unsolicited reports while in CFUN=4 state... this patch makes it so
that these are ignored until the modem is onlined and the actual
SIM state can be queried again.
Also remember the modem can be 'Online' even without a SIM, or in
pre-SIM state for e.g. emergency calls. So much of the logic might break.
OK, I need to check what CFUN mode we need in order to be able to make
emergency calls. I think 4 won't work... CFUN=4 is really 'airplane
mode' with antennas off.
My interpretation of modem 'enabled' in ofono is that it's 'airplane
mode'... is this not correct?
It follows the 'Powered' property meaning. E.g. 'is this thing on?'
Most regular modem devices enter airplane mode when the driver enabled()
function is called. However, that is not the case everywhere.
Regards,
-Denis
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