On 02/08/2018 06:18 PM, Greg KH wrote: > On Thu, Feb 08, 2018 at 06:10:59PM +0100, jjDaNiMoTh wrote: >> Hello everyone, >> >> There is an example of LTE netdevice in the Linux source tree? >> >> In particular, I would like to know if there is any device driver that >> implements the layers required by the 3GPP standard. I imagine that it >> should exist something since Android is communicating over LTE, but I can't >> find any reference. > > That communication happens usually through a "dumb" serial-like > connection to the LTE modem. All of the modem commands are handled in > userspace, the kernel doesn't care about anything relating to this at > all (and it really shouldn't). > >> What I fear more is that everything related to LTE is inside the >> closed device firmware, and data is sent from the TC layer into this >> black-box firmware through a sort of API. In this case, it would be >> wonderful to know where, exactly, this API is used, to try to >> understand what the firmware is doing. > > Look at the Android AOSP images for the location for most of this logic, > there should be a Telephony HAL somewhere in there that handles the > heavy-lifting of all of this logic. > As far as i know in AOSP you can look into hardware/ril for the modem integration. There is a generic RIL daemon which interacts with a RIL library which is vendor specific and is responsible to configure the hardware. And that can be a problem because the vendor software most likely is not open source but you may always give a look to the daemon which is part of the > Good luck! > > greg k-h > > _______________________________________________ > Kernelnewbies mailing list > Kernelnewbies@xxxxxxxxxxxxxxxxx > https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies > _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
