Samsung Modem

This is a technical page designed to see how to implement support for Samsung modems in postmarketOS.

Samsung modems use three abstraction layers:

1. Kernel interface (specific to each modem)
   1. This can be further divided into the power control of the modem, the kernel<->userspace interaction, and the kernel<->modem interaction
2. Samsung IPC modem protocol (specific to Samsung devices)
3. Radio Interface Layer
   1. On Android, this is via RIL, it could go via oFono on pmOS

The IPC protocol, libsamsung-ipc, has been reimplemented as free software by Replicant.

There have been patches to add libsamsung-ipc support to ofono, a potential RIL for postmarketOS, but it doesn't seem like they were merged due to licensing issues which have now been resolved. libsamsung-ipc has since been almost entirely re-written, but the patches have been forward-ported at https://github.com/xc-racer99/ofono and https://github.com/xc-racer99/libsamsung-ipc