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f949001480
1. Vendor-neutral modem compatibility:
- Discovery switched from a vendor-ID whitelist to detecting the QMI
channel directly (an interface bound to the kernel qmi_wwan driver),
so SIMCom, Sierra, Telit and other Qualcomm-based modules are found
automatically while MBIM-only devices stay excluded
- AT port responses now distinguish an AT command error from firmware
incompatibility: ERROR / +CME ERROR is returned as a normal response
(200) instead of being folded into a 502, which only a real transport
failure produces
2. Fixed the 410 dongle's AT command timeouts:
- Default WWAN AT port switched from wwan0at0 to wwan0at1: ModemManager
marks the first AT port that answers its probe as primary (at1 on the
tested UFI dongles) and closes AT ports once initialization finishes,
so at1 is the responsive, idle channel for vocat while MM uses the
QMI port for control
- Drain the WWAN input buffer before each command write, discarding the
late bytes of a previous timed-out command so they cannot pollute the
next response's parsing
- AT+CGSN now uses an independent short timeout instead of inheriting
the refresh's 30s deadline (on MHI modems it returns the IMEI line
but never a final OK). Previously every refresh held the device lock
for the full 30s, queueing AT terminal commands behind it for 10-20s
- The QMI UIM ICCID fallback only runs when AT+CPIN? already proved a
READY card, so a SIM-less slot no longer blocks refresh waiting out
its long timeout
Tests: added WWAN drain cleanup, drain-before-write ordering, CGSN timeout
bound, skip-QMI-ICCID-without-SIM, CommandError-as-200, WWAN at1 port
selection and vendor-neutral discovery cases. go vet and go test ./... pass.
Co-authored-by: Test <[email protected]>