ath79 porting of NEtgear R6100

[Paul D]

In my (admittedly limited) experience, there are sometimes multiple ways 
of accessing the same hardware. So while what you have works, it might 
need refinement, or changing completely.

It might require reading data-sheets of the chips your board has.

e.g.

https://datasheetspdf.com/pdf-file/825113/Atheros/AR9344/1


In the first few pages, I see that accessing ethX is done via:

MII, RMII, RGMII.

Page 61 has a nice overview.


So you may need to stare and compare with existing devices to see how 
they did it. Not everything will make sense...




On 2021-08-17 08:47, Enrico Mioso wrote:
> Hello all!!
> 
> Well, sorry, I've been unclear about the fact that this dmesg comes from 
> ar71x.
> 
> Thanks Paul for the the hints. I tried looking at similar devices, like 
> the hiveap-121, but s far I had no luck. And so decided it would be best 
> to follow a more "technical" pproach.
> Trials and errors worked well in other cases but I guess this time they 
> may not.
> 
> Side note: recovery ath79 image is accepted via tftp.
> 
> 
> 
> On Mon, 16 Aug 2021, Paul D wrote:
> 
>> Date: Mon, 16 Aug 2021 23:16:54
>> From: Paul D <newtwen at gmail.com>
>> To: openwrt-devel at lists.openwrt.org
>> Subject: Re: ath79 porting of NEtgear R6100
>>
>>
>>
>> On 2021-08-16 17:24, Enrico Mioso wrote:
>>> Hello all!!
>>>
>>> It's me, again trying to port a device to ath79. And guess where I am 
>>> stuck ... in the Ethernet part and switch configuration. :)
>>>
>>> The device runs ar71xx, I have the io package installed.
>>>
>>> I can get replies from the device, but ping doesn't see them (only 
>>> tcpdump), which means something in the timing or data is wrong.
>>>
>>> The system is otherwise able to boot.
>>> Can you help, maybe poiting me where I can look?
>>> At the moment I have no UART access to the system, so I was trying to 
>>> debug things in ar71xx and take inspiration looking at the DTS files 
>>> around.
>>>
>>
>> My guess is that you forgot the switch config, or DSA support.
>>
>> Look at similar devices. I guess you need some trial and error.
>>
>>
>> Otherwise, DSA support. Look at other ath79 DSA porting efforts:
>>
>> https://github.com/openwrt/openwrt/pull/4036
>>
>>
>> I see eth0 and eth1 in the bootlog, so that's a good thing.
>>
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