Re: [coreboot] x60 : adding WWAN support

[Vladimir 'φ-coder/phcoder' Serbinenko]

On 01.09.2014 22:19, Charles Devereaux wrote:
> Hello
>
> I'm interested in WWAN support, mostly for the GPS features and the cool
> things you can do with them (like a stratum ntp server).

Most GPS receivers don't have enough precision for any timing.
> I was told a EM770W doesn't even need a network registration to output
> NMEA coordinates
> (http://forum.thinkpads.com/viewtopic.php?f=30&t=114426#p735612) so I
> got one.
>
> I looked at patch #4056 which enable WWAN for the EC, but it seems to
> only part of the job: the ACPI table should also contain a GWAN key for
> thinkpad-acpi

Not necessary.
> Apparently, this last part cause the WWAN card not to be handled by
> thinkpad-acpi, which would otherwise provide rfkill support (usefull to
> save power, something I'd like to improve)

Soft rfkill is always available through wwan driver.
> I believe similar entries should be added to coreboot asl, but I'm not
> sure of how integrated they should be. If I understand correctly,
> following the logic of patch #5242, there should be a conditional
> statement then some acpigen.

5242 is very special because of wacom tablet interaction (serial device
naming)
See src/ec/lenovo/h8/acpi/ec.asl and included files for the relevant scopes

x60 : adding WWAN support

[Charles Devereaux]

Hello

On Mon, Sep 1, 2014 at 4:33 PM, Vladimir 'φ-coder/phcoder' Serbinenko <
[e-mail]> wrote:

Most GPS receivers don't have enough precision for any timing.
>

Would you recommend a specific one?
> Apparently, this last part cause the WWAN card not to be handled by
> > thinkpad-acpi, which would otherwise provide rfkill support (usefull to
> > save power, something I'd like to improve)
>
> Soft rfkill is always available through wwan driver.

What should I do to enable it? At the moment it is not showing in rfkill
list, even while I monitor the lack of satellites fix with:

echo 'AT^WPDGP' > /dev/ttyUSB0

cat /dev/ttyUSB3|grep GPGSV|grep -v 00

*$ rfkill list

0: phy0: Wireless LAN

Soft blocked: no

Hard blocked: no

1: hci0: Bluetooth

Soft blocked: no

Hard blocked: no

I read http://www.thinkwiki.org/wiki/Ericsson_F3507g_Mobile_Broadband_Module
which mentions /sys/devices/platform/thinkpad_acpi/rfkill/rfkill0/state,
but I believe it depends on the ACPI entries to show up.

Thanks

Charles