Hi Eric, I think this is a very helpful hint!
We already started contacting Fibocom. If we know that there is in general a firmware available which forces the module in USB mode this would be a discussion option. How does this firmware behaves in terms of provider specific firmware versions? Are there carrier specific firmware available too or is there a generic firmware necessary only? Thank you & best regards, Dennis On Wed, 2020-06-24 at 14:54 -0700, Eric Caruso wrote: > On Chromebooks, we use the L850-GL in USB mode and it works well. I > believe the firmware we get from Fibocom forces the module into USB > mode, though, so that might not be super helpful for this discussion. > > On Tue, Jun 23, 2020 at 4:21 AM Wassenberg, Dennis > <dennis.wassenb...@secunet.com> wrote: > > > > Hi all, > > > > thank you for these hints! > > > > I think I will try the Intel XMM 7560 / Fibocom L860 modem as well. > > > > @Dan: You said that there is a (alpha/beta) driver existing. Is there a > > possibility to get it to have a try how this > > behaves? > > > > Thank you & best regards, > > > > Dennis > > > > On Mon, 2020-06-22 at 11:23 -0500, Dan Williams wrote: > > > On Mon, 2020-06-22 at 10:45 +0200, Reinhard Speyerer wrote: > > > > On Mon, Jun 22, 2020 at 06:51:50AM +0000, Wassenberg, Dennis wrote: > > > > > Hi all, > > > > > > > > > > I tested the PCI approach. > > > > > > > > > > Unfortunately I had no luck. The kernel PCI driver at > > > > > https://github.com/xmm7360/xmm7360-pci can not initiale the modem > > > > > correctly. The modem stays at status=0xfeedb007. This seems to mean > > > > > that the modem is (still) booting. After 20 seconds > > > > > probing fails. The kernel driver gives up waiting for the device to > > > > > boot. > > > > > > > > > > So, both options: usb switch and native pci driver will not work. > > > > > > > > > > Are there any ideas how to continue? > > > > > > > > > > > > > Hi Dennis, > > > > > > > > some time ago Johannes Berg was working on a WWAN subsystem for the > > > > Linux > > > > kernel ( > > > > https://lore.kernel.org/netdev/20200225100053.16385-1-johan...@sipsolutions.net/T/#t > > > > ) which also mentioned the 'upcoming Intel 4G modem driver ("iosm")'. > > > > > > That effort is currently stalled. And the pci-based driver you mention > > > supports 7560 and later, not earlier devices. Not sure how hard it > > > would be to adapt to earlier devices though. > > > > > > It does exist, but it's not quite ready for upstreaming yet. > > > > > > Dan > > > > > > > Perhaps it might help to ask him what the current status of this > > > > project is. > > > > > > > > Regards, > > > > Reinhard > > > > > > > > > Thank you & best regards, > > > > > > > > > > Dennis > > > > > > > > > > > > > > > On Thu, 2020-06-18 at 16:24 +0200, Dennis Wassenberg wrote: > > > > > > Hi Bjørn, > > > > > > > > > > > > thank you for your estimation. > > > > > > > > > > > > > Do you have any confirmation that it is actually possible to > > > > > > > switch this > > > > > > > firmware into USB mode? Are there other firmwares available > > > > > > > with > > > > > > > (possible) USB support? > > > > > > > > > > > > > > > > > > > I don't have a confirmation that the USB mode will really work, > > > > > > especially on the new models. > > > > > > > > > > > > Last year (Lenovo Thinkpad Whiskey Lake series) there was the > > > > > > possibility to choose between the slow modem (Fibocom > > > > > > L830-EB) and the faster option Fibocom L850-GL. This year the > > > > > > slow modem ist the fast modem of the last year and the > > > > > > fast modem is CAT16 Fibocom L860-GL. > > > > > > > > > > > > Regarding the Lenovo Thinkpad Whiskey Lake series models I found > > > > > > some threads where the USB mode switch worked: > > > > > > > > > > > > > > > > https://forums.lenovo.com/t5/Other-Linux-Discussions/WWAN-Fibocom-L850-GL-and-Linux-support/m-p/4318903?page=1#4327397 > > > > > > https://gmt-24.net/archives/1461 > > > > > > > > > > > > Thats why I assumed that this might work at newer Thinkpads as > > > > > > well. > > > > > > > > > > > > Especially https://gmt-24.net/archives/1461 shows that your > > > > > > assumption regarding the bootloader and application mode > > > > > > seems to be correct. > > > > > > > > > > > > This comes out directly after disabling the PCIe link and > > > > > > directly after that: > > > > > > [ 162.799214] usb 1-6: new high-speed USB device number 5 using > > > > > > xhci_hcd > > > > > > [ 162.940604] usb 1-6: New USB device found, idVendor=8087, > > > > > > idProduct=07f5, bcdDevice= 0.00 > > > > > > [ 162.940612] usb 1-6: New USB device strings: Mfr=0, Product=0, > > > > > > SerialNumber=0 > > > > > > [ 169.651754] usb 1-6: USB disconnect, device number 5 > > > > > > > > > > > > Now bcdDevice changed to real device id. > > > > > > > > > > > > [ 175.462630] usb 1-6: new high-speed USB device number 6 using > > > > > > xhci_hcd > > > > > > [ 175.620153] usb 1-6: New USB device found, idVendor=2cb7, > > > > > > idProduct=0007, bcdDevice= 3.33 > > > > > > [ 175.620162] usb 1-6: New USB device strings: Mfr=1, Product=2, > > > > > > SerialNumber=3 > > > > > > [ 175.620167] usb 1-6: Product: L850-GL > > > > > > [ 175.620172] usb 1-6: Manufacturer: Fibocom Wireless Inc. > > > > > > [ 175.620176] usb 1-6: SerialNumber: 004999010640000 > > > > > > > > > > > > > > > > > > > Anyway, FWIW, I'd explore the PCIe driver option first if I > > > > > > > were you. > > > > > > > That's the only mode tested by anyone, so it is more likely to > > > > > > > work. > > > > > > > > > > > > Ok, I will try that approach and let you know my results. > > > > > > > > > > > > Thank you & best regards, > > > > > > > > > > > > Dennis > > > > > > > > > > > > > > > > > > On Thu, 2020-06-18 at 15:36 +0200, Bjørn Mork wrote: > > > > > > > "Wassenberg, Dennis" <dennis.wassenb...@secunet.com> writes: > > > > > > > > > > > > > > > After that dmesg shows this: > > > > > > > > [ 930.843781] usb 1-7: new high-speed USB device number 16 > > > > > > > > using xhci_hcd > > > > > > > > [ 930.996572] usb 1-7: New USB device found, idVendor=8087, > > > > > > > > idProduct=07f5, bcdDevice= 0.00 > > > > > > > > [ 930.996577] usb 1-7: New USB device strings: Mfr=0, > > > > > > > > Product=0, SerialNumber=0 > > > > > > > > [ 937.683939] usb 1-7: USB disconnect, device number 16 > > > > > > > > > > > > > > > > So, in general I think there should be USB lines routed to > > > > > > > > the M.2 slot but I have no idea why the device leaves > > > > > > > > the > > > > > > > > bus. It is possible to run the script again and again but in > > > > > > > > the end it will always disconnect automatically. > > > > > > > > > > > > > > I know nothing about these modems, but my guess is that this is > > > > > > > a > > > > > > > bootloader mode. Mostly based on the assumption that there will > > > > > > > be one, > > > > > > > and that the vendor-id will be something non-Intel in > > > > > > > application mode. > > > > > > > > > > > > > > You can probably confirm this by capturing the full device > > > > > > > descriptor, > > > > > > > e.g by creating a udev rule to dump it or simply by snooping on > > > > > > > the bus. > > > > > > > > > > > > > > If this assumption is correct, then the firmware was supposed > > > > > > > to boot > > > > > > > into an application mode and then reconnect to the USB bus with > > > > > > > its real > > > > > > > device ID and descriptors. This could be failing due to a > > > > > > > firmware > > > > > > > crash, maybe caused by this unexpected state. Or more > > > > > > > likely: The > > > > > > > firmware on this modem is built without support for the USB > > > > > > > mode. > > > > > > > > > > > > > > Do you have any confirmation that it is actually possible to > > > > > > > switch this > > > > > > > firmware into USB mode? Are there other firmwares available > > > > > > > with > > > > > > > (possible) USB support? > > > > > > > > > > > > > > > > > > > > > Anyway, FWIW, I'd explore the PCIe driver option first if I > > > > > > > were you. > > > > > > > That's the only mode tested by anyone, so it is more likely to > > > > > > > work. > > > > > > > > > > > > > > > > > > > > > > > > > > > > Bjørn > > > > > > > > > > _______________________________________________ > > > > > ModemManager-devel mailing list > > > > > ModemManager-devel@lists.freedesktop.org > > > > > https://lists.freedesktop.org/mailman/listinfo/modemmanager-devel > > > > > > > > _______________________________________________ > > > > ModemManager-devel mailing list > > > > ModemManager-devel@lists.freedesktop.org > > > > https://lists.freedesktop.org/mailman/listinfo/modemmanager-devel > > > > > > > > > > _______________________________________________ > > > ModemManager-devel mailing list > > > ModemManager-devel@lists.freedesktop.org > > > https://lists.freedesktop.org/mailman/listinfo/modemmanager-devel > > > > _______________________________________________ > > ModemManager-devel mailing list > > ModemManager-devel@lists.freedesktop.org > > https://lists.freedesktop.org/mailman/listinfo/modemmanager-devel > > _______________________________________________ > ModemManager-devel mailing list > ModemManager-devel@lists.freedesktop.org > https://lists.freedesktop.org/mailman/listinfo/modemmanager-devel _______________________________________________ ModemManager-devel mailing list ModemManager-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/modemmanager-devel
