Unable to flash EM929x on Linux

IoT Modules MC/EM Series
1

Hello,

I have been unsuccessful in flashing firmware on EM929x series on Linux. There are two problems:

  1. MBPL drivers/mhictrl.ko packaged for Linux are built against an very old kernel (5.3.0-55). My hardware cannot boot that kernel so I cannot run those drivers to flash FW. Could Sierra please build MBPL/mhictrl against a newer kernel?

  2. Using the open-source/upstream MHI driver, I tried putting modem into EDL by issuing AT!BOOTHOLD. MHI driver shows SAHARA port is available, but it gets stuck there. I suspect the modem waiting for the firehose EDL ELF file and Sierra does not seem to supply that in standalone fashion. I do have the upstream MHI driver working with AT/MBIM/DIAG/QMI ports just great, but I am completely stuck without being able to flash the firmware in some way!

Thanks

2

hrm, reading online and it seems like everyone is flashing through USB.

I’d be curious to know if anyone has gotten MHI/mPCI-e based flashing to work, but for now this seems to work.