Re: [PATCH 1/2] tty: n_gsm: Fix long delays with control frame timeouts in ADM mode

Tony Lindgren
2018-04-08T23:57:40Z

* Pavel Machek <pavel@ucw.cz> [180408 19:07]:
> Hi!
>
> > > Do you have a tool to use and a script?
> >
> > Yes I used the shell script I posted earlier, but forgot it also
> > needs the ldattach done.
> >
> > Anyways, last night and today I wrote a quick test utility called
> > droid4-ngsm that initializes things and I can use to do some
> > experiments to get the ts27010 channel proxying to W3GLTE also
> > going:
> >
> > http://github.com/tmlind/droid4-ngsm/
>
> Ok, now i'm confused. It wants to bind to ttyS0, but modem is on
> ttyUSB4 AFAICT? Or is the modem connected to serial port, too? (Do I
> need to enable some more drivers for that?)
>
> I do have ttyS0, but I don't think there's anything attached there. Or
> is ttyS0 for the LTE modem?

The ttyS0 is connected to mdm6600, and ttyUSB4 seems to be
some buggy subset of ttyS0 n_gsm dlci1. You need need at least
the following commits in current mainline kernel:

984c7706ff18 ("ARM: dts: omap4-droid4: Configure uart1 pins")
e5b9fd7bdeb5 ("ARM: dts: omap4-droid4: Configure MDM6600 USB PHY")

And then you need PHY_MAPPHONE_MDM6600 and CONFIG_N_GSM enabled.

Regards,

Tony