Re: Failed to scan network with 2200BG

> 
> I expect to find a network on the 11th channel. I use another 
> 2200BG on a PC under Windows that find a network on this Channel.

Thanks.

> 
> In these traces, no NMI was transmitted, but sometimes it happens.
> 
> Another question: I use a PowerPC platform with a little 
> endian bus on the PCI. Do I have a realignment of dma data?

I would guess that Linux infrastructure would do the right thing here,
but that's not an area I'm really familiar with.  Since the commands are
issued to the 2200 via DMA, and the scan seems to be working (at least
going through the motions successfully, as the driver sees it), I'd
guess that DMA is working okay.

Could you try using debug=0x01043fff?  This adds the DEBUG_RX output to
the log.  It should show up something if you're receiving any packets at
all.

If you want to try some hacking to check the sanity of the data, as the
driver sees it, try adding an IPW_DEBUG_RX() or two within ipw_rx().
ipw_rx() is the first function that starts figuring out what to do with
a frame notification from the 2200 hardware.  You should be able to
examine the ieee80211 header there.  Within ipw_rx(), search for
"ieee80211_hdr_4addr" and see how the "header" variable gets set up.
Try IPW_DEBUG_RX for a few values within the ieee80211 header,
preferably before ipw_rx() gets into parsing stuff (and perhaps getting
confused if data is swapped around!).  Don't confuse ieee80211 header
(part of data payload) with the packet->header (added by 2200 firmware
to tell driver what kind of info it's sending to driver, etc.).

For "extra credit", take a look at ipw_report_frame() in the ipw3945
driver, and see if you could port that over to 2200.  I put
ipw_report_frame() in the 3945 driver a while back, to help debug
scanning issues there ... never got to put it into 2200.

BTW, if the AP signal is reasonably strong, you might receive packets
when tuned to channels other than 11.  This is normal behavior for B/G
band, because of channel overlap (20 MHz channel width, 5 MHz channel
separation).

-- Ben --  


> 
> Thanks
> 
> Pascal FIFRE

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