Re: [PATCH RFC:rxctl wait timed out] brcmfmac: add BCM43526 USB support

[Arend van Spriel <arend@broadcom.com>]

On 05/08/15 11:53, Rafał Miłecki wrote:
> On 8 May 2015 at 11:28, Arend van Spriel<arend@broadcom.com>  wrote:
>> On 05/07/15 22:28, Rafał Miłecki wrote:
>>> I'm trying to add BCM43526 support. This chipset can be found in:
>>> 1) Some USB dongles, e.g. Tenda W900U uses revision 2
>>> 2) Some routers, e.g. Asus RT-AC53U uses revision 3+
>>>
>>> Unfortunately attached patch doesn't seem to be enough, brcmfmac doesn't
>>> work with my Tenda W900U. I keep getting following error:
>>>>
>>>> brcmfmac: brcmf_usb_recv_ctl Enter
>>>> brcmf_usb_rx_ctlpkt: rxctl wait timed out
>>>> brcmfmac: brcmf_fil_cmd_data Failed: -5
>>>
>>>
>>> It seems that:
>>> 1) driver sends TX URB and gets completion callback called
>>> 2) driver sents RX URB but it never gets completed
>>
>> Unfortunately this device is a BMAC device. You can tell by the 'high' word
>> in the windows driver name. So there is no chance whatsoever to get this
>> device going with brcmfmac.
>
> Oh damn, I was sure Broadcom dropped this design back in BCM43236
> times, I didn't even suspect newer chipsets may be still using it :(
> Shit.

Apparently this design is still in demand by our customers against all 
hopes.

> Do you have any idea about BCM43526 rev 3+? The chipsets using 43526b
> instead of 43526a. Any chance BCM43526 rev 3+ is normal FullMAC device
> just like BCM43236 rev 3+?

I don't know. Main thing needed for that is more on-chip memory, which 
makes it a bit more expensive. This may be a deal breaker for existing 
43526 customers unless they like the fullmac advantages they get for 
their money.

Regards,
Arend