Re: [PATCH] rt2x00: Provide regulatory hint with rt2500pci/usb

[Ivo van Doorn <ivdoorn@gmail.com>]

On Tuesday 06 January 2009, Luis R. Rodriguez wrote:
> On Tue, Jan 06, 2009 at 09:32:20AM -0800, Ivo van Doorn wrote:
> > > > Sure, I was a bit doubting about the timing of the call, I noticed that zd1211rw called it during the start()
> > > > callback function. Would that be the best location? Or right after ieee80211_register_hw()?
> > >
> > > Doesn't really matter, so long as its after ieee80211_register_hw() has been called
> > > would be nice.
> > 
> > Ok.
> > 
> > > > > 2. I'm still puzzled how to handle the two different values that the EEPROM has, namely one for the bg band and one for the a band. I've handled it by registering the one associated with the configured band, but that seems to be unlikely to be correct. I still haven't found a better way to handle this.
> > > >
> > > > Because of this I hadn't looked very deep into rt61 and rt73 yet.
> > > >
> > > > > The problem isn't there for the bits that Ivo sent, as the rt2500 devices don't support the a band.
> > > >
> > > > For rt2500pci and rt2500usb there are chipsets which support 5GHz (they are rare, but they do exist),
> > > > comments for the Ralink drivers indicate they simply didn't add the regulatory domain definitions yet.
> > >
> > > Based on the documentation from the EEPROM for all devices I read that its recommended
> > > that the EEPROM *not be relied on for the regulatory domain*, instead it recommends the
> > > windows registry be used.
> > >
> > > Based on tests for the devices with only one band, do are you seeing an actual regulatory
> > > domain in the EEPROM?
> > 
> > I have to check, but I don't think I have any hardware with valid domain values.
> > 
> > > To deal with the issue of having two separate EEPROM values for a regulatory domain
> > > and since the documentation indicates to not rely on it I would advise to allow users
> > > to be compliant by selecting the country they are in. wpa_supplicant has support for
> > > selecting country now, and so does iw. Eventually I see Network Manager letting users
> > > select the country. But you guys are the maintainers and developers so you will know
> > > better.
> > 
> > Well it is fine with me,  understood from earlier discussion that it was advised that drivers
> > attempted to set the domain if they could. Hence the reason I had added reading the EEPROM
> > for domain values to the TODO list. But it is true that it is quite rare that there are valid values
> > for it. So it would be fine with me by letting the user handle it completely.
> 
> I see -- well if there are *some* cards that do have valid EEPROM values then it seems worth it
> to do the actual regulatory_hint(), for dual band cards you can probably just not support it. But
> its up to you guys. Just my advice based on the documentation I have read so far.

Ok.

Gertjan, do you know if there is any hardware with valid GEO data in the EEPROM?

Ivo