onboard wireless on rpi4

[Klaus Cucinauomo]

> Am 05.09.2020 um 20:12 schrieb tech-lists <tech-lists at zyxst.net>:
> 
> ...Sure, it'll be the next thing i build ...

> Have to admit i've never built MMCCAM kernel before for rpi 1,2b+ or 3b+.
> What's significant about it?
> 
> thanks,
> -- 
> J.

Thanks that you’re willing to step into tests ( a very important thing to save the devs some (testing) time 
And give feedback on boards/machines that devs don’t own)!

`ll try to describe mmccam  in simplest human understandable words :
mmccam enables the output of :
'camcontrol devlist`…. 
what will (currently)return an empty tag on the second SDIO-IC on RPI ,
what means that there is something available on the SDIO-bus(the Wifi-chip),
which can’t be initialized because of a missing driver/firmware.
The brcm-wifi-chip on the RPI4 is detected over the SDIO-bus( SD means SD-card, IO means in/out).
MMC means : MultiMediaCard.
CAM means: Common Access Method, which is a SCSI-subsystem in Fbsd.
So Björn talks to the Wifi-chip via the SD-Card-bus which is 'detected' 
over the SCSI-bus in his CAM-implementation.
GENERIC-MMCCAM,as Björn told,( to say in hard but friendly words :-) Ha Ha ), 
isn’t enabled by default in GENERIC(-nodebug) because it currently doesn’t do anything final 
for production-mode (e.g. on the RPI).
So the best thing which could happen is that my description is totally outdated and wrong-
and you would see  fully working WIFI on your RPI :-), but don’t expect that for now...

Good luck,
Regards

kls