rtwn card not delivering interrupts from beacon frames

[Andriy Voskoboinyk]

Hi,

For correct work pc_enable_intr / sc_start_xfers need to be adapted too;
also, there may be need to utilize R88E_HIMRE / R88E_HISRE registers
in addition to R88E_HIMR / R88E_HISR pair (see '8188 IMR/ISR bits'
section in include/hal_com_reg.h in the vendor driver).

> Hi all,
>
> As discussed, I am working on the rtwn rtl8188ee driver. Per Adrian's  
> advice, I am focusing on having the card reading beacon frames. I am  
> running the following tcpdump line, which works on another machine with  
> an rtwn card.
>
> # tcpdump -y IEEE802_11_RADIO -i wlan0 -e -s 256 type mgt
>
> Unfortunately, my card still does not receive beacon frames. Per IRC  
> conversations, this information is delivered to the driver via an  
> interrupt.
>
> I retracted my sc_init_intr code and found that the interrupt register  
> was incorrectly set, so I updated them per the Linux driver and started  
> having sc_classify_intr trigger very slowly (1-2 a minute), rather than  
> with every beacon frame from a nearby Access Point. The 'status' was set  
> to 0xffffffff, so it immediately exited.
>
> What might this mean?
>
> I am stuck and not certain why I am not receiving more beacon frames. I  
> have retraced the code, but am not finding what I might have left out.  
> Any ideas? I can show code if requested. Been on this driver for a  
> little more than a year now and would like to start making progress. :/
>
> Thank you,
> Farhan
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