From: noname.nuno@gmail.com (Nuno Sá)
To: kernelnewbies@lists.kernelnewbies.org
Subject: Interface between LTE devices and Linux
Date: Tue, 13 Feb 2018 08:59:51 +0100 [thread overview]
Message-ID: <f411d2f8-3c49-3cf1-bc02-683b39f0e836@gmail.com> (raw)
In-Reply-To: <20180208171828.GA11601@kroah.com>
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
>
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next prev parent reply other threads:[~2018-02-13 7:59 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-08 17:10 Interface between LTE devices and Linux jjDaNiMoTh
2018-02-08 17:18 ` Greg KH
2018-02-13 7:59 ` Nuno Sá [this message]
2018-02-13 13:21 ` Jeffrey Walton
2018-02-13 15:30 ` Bjørn Mork
2018-02-13 16:07 ` Jeffrey Walton
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