Re: [PATCH] USB: serial: option: adding support for ublox R410M

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On 4/26/2018 23:12, Johan Hovold wrote:
On Thu, Apr 26, 2018 at 06:40:46PM +0700, Lars Melin wrote:
On 4/26/2018 18:39, Lars Melin wrote:
On 4/26/2018 18:19, Bjørn Mork wrote:
Anyway, Qualcomm based designs are definitely handled by both drivers.
Using qcserial only makes sense if the interface layout matches one of
the defined shared schemes, which currently are:

     QCSERIAL_G2K = 0,    /* Gobi 2000 */
     QCSERIAL_G1K = 1,    /* Gobi 1000 */
     QCSERIAL_SWI = 2,    /* Sierra Wireless */
     QCSERIAL_HWI = 3,    /* Huawei */

It seems to me that this Quectel device matches the interface layout for
Gobi1K:

           * Gobi 1K USB layout:
           * 0: DM/DIAG (use libqcdm from ModemManager for communication)
           * 1: serial port (doesn't respond)
           * 2: AT-capable modem port
           * 3: QMI/net
           */

Ublox, not Quectel..

Yeah, but qcserial appears to select a different altsetting for the DM
port for Gobi 1000, an altsetting which this particular device does not
have.

I didn't re-read the full thread I referred to earlier, but I think in
it, Dan mentioned Gobi 1000 device requiring firmware to be loaded too.

So if it's not a G1K device, we probably shouldn't be using qcserial
even if the interface layout happens to match.

Thanks,
Johan

Good point, I forgot about the required firmware loading for Gobi1K.
So this device should be handled by the option driver.

/Lars


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