Quectel EP06 Support

[Paul Gildea]

Thanks Reinhard, I'll look at making those changes for myself.

On Wed, 27 Mar 2019 at 19:05, Reinhard Speyerer <rspmn at arcor.de> wrote:

> On Wed, Mar 27, 2019 at 04:59:49PM +0000, Paul Gildea wrote:
> > Hi,
> >
> > I'm trying to get one of these working with libqmi and just a quick
> query.
> > When I plug it in, the USB interfaces get enumerated and I can query with
> > AT commands:
> >
> > [ 5011.373590] usb 2-2: new SuperSpeed USB device number 7 using xhci_hcd
> > [ 5011.387064] usb 2-2: New USB device found, idVendor=2c7c,
> idProduct=0306
> > [ 5011.387068] usb 2-2: New USB device strings: Mfr=1, Product=2,
> > SerialNumber=3
> > [ 5011.387070] usb 2-2: Product: LTE-A Module
> > [ 5011.387073] usb 2-2: Manufacturer: Quectel
> > [ 5011.387075] usb 2-2: SerialNumber: 0123456789ABCDEF
> > [ 5011.388207] usb 2-2: Enable of device-initiated U1 failed.
> > [ 5011.388433] usb 2-2: Enable of device-initiated U2 failed.
> > [ 5011.388560] option 2-2:1.0: GSM modem (1-port) converter detected
> > [ 5011.388724] usb 2-2: GSM modem (1-port) converter now attached to
> ttyUSB3
> > [ 5011.388896] option 2-2:1.1: GSM modem (1-port) converter detected
> > [ 5011.389046] usb 2-2: GSM modem (1-port) converter now attached to
> ttyUSB9
> > [ 5011.389231] option 2-2:1.2: GSM modem (1-port) converter detected
> > [ 5011.389348] usb 2-2: GSM modem (1-port) converter now attached to
> > ttyUSB13
> > [ 5011.389549] option 2-2:1.3: GSM modem (1-port) converter detected
> > [ 5011.389663] usb 2-2: GSM modem (1-port) converter now attached to
> > ttyUSB14
> >
> >
> > However no wwan or cdc-wdm interface appears. I'm poked around and added
> > the ID's to the live system and they've appeared:
> >
> > echo "2c7c 0306" > /sys/bus/usb/drivers/qmi_wwan/new_id
> >
> > [ 6526.508140] usb 2-2: Disable of device-initiated U1 failed.
> > [ 6526.508474] usb 2-2: Disable of device-initiated U2 failed.
> > [ 6526.510142] qmi_wwan 2-2:1.4: cdc-wdm6: USB WDM device
> > [ 6526.510755] qmi_wwan 2-2:1.4 wwan6: register 'qmi_wwan' at
> > usb-0000:00:14.0-2, WWAN/QMI device, 52:32:30:ea:0a:e6
> > [ 6526.511242] usb 2-2: Enable of device-initiated U1 failed.
> > [ 6526.511645] usb 2-2: Enable of device-initiated U2 failed.
> >
> >
> > I could add this ID to drivers/usb/serial/qcserial.c if that is that all
> > that is needed to add support for it, or would I need to modify it in a
> > different way? Quectel aren't in the struct with the other modems.
> >
> https://github.com/torvalds/linux/blob/master/drivers/usb/serial/qcserial.c
> >
> > At the moment my queries to the cdc-wdm are timing out, but I will try
> and
> > build in support to see what happens, instead of doing it live.
> >
> > qmicli --device-open-qmi -p -d /dev/cdc-wdm6 --dms-get-operating-mode
> > error: couldn't create client for the 'dms' service: CID allocation
> failed
> > in the CTL client: Transaction timed out
> >
>
> Hi Paul,
>
> support for the Quectel EP06 has already been added by Kristian Evensen and
> a follow-up patch by Johan Hovold here:
>
>
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c0b91a56a2e57a5a370655b25d677ae0ebf8a2d0
>
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=71a0483d56e784b1e11f38f10d7e22d265dbe244
>
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7c5cca3588545e7f255171e28e0dd6e384ebb91d
>
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=36cae568404a298a19a6e8a3f18641075d4cab04
>
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=35aecc02b5b621782111f64cbb032c7f6a90bb32
>
> Since the EP06 requires QMI_QUIRK_SET_DTR the new_id mechanism can't
> be used for it. You would at least have to backport the qmi_wwan.c
> changes to make the QMI interface work.
>
> Regards,
> Reinhard
>
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