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SubjectRe: [PATCH v2] USB: serial: qcserial: Support for SDX55 based Sierra Wireless 5G modules
Date
On Donnerstag, 24. Juni 2021 09:28:59 CEST Johan Hovold wrote:
> [ +CC: Daniele and Bjørn ]
>
> On Fri, Jun 11, 2021 at 03:58:41PM +0200, Stefan Brüns wrote:
> > The devices exposes two different interface compositions:
> > - QDL mode, single interface
> > - MBIM mode, MBIM class compliant plus AT/DM(/ADB)
> >
> > Current firmware versions (up to 01.07.19) do not expose an NMEA port.
>
> We already have at least one SDX55 based modem (FN980) supported by the
> option driver. Any particular reason why you chose to add it to qcserial
> instead of option?
>
Support for qualcomm based modems are spread over option and qcserial. All
other Sierra devices are supported by qcserial.

> Note that the FN980 also needs the ZLP flag set in QDL (flashing) mode,
> I'd assume this one needs it too.

It depends if you implement the Firehose protocol in accordance to the
specification or not. 80-NG319-1 (Firehose specification) explicitly states to
pad any XML command packet which is an exact multiple of 512 bytes with an
extra newline or other whitespace character.

Regards,

Stefan

--
Stefan Brüns / Bergstraße 21 / 52062 Aachen
home: +49 241 53809034 mobile: +49 151 50412019[unhandled content-type:application/pgp-signature]
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