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
