Re: CRDA and ath5k with no country code in EEPROM

From: "Luis R. Rodriguez" <mcgrof@gmail.com>
To: Krzysztof Halasa <khc@pm.waw.pl>
Cc: linux-wireless@vger.kernel.org
Subject: Re: CRDA and ath5k with no country code in EEPROM
Date: Mon, 29 Mar 2010 15:00:47 -0700	[thread overview]
Message-ID: <43e72e891003291500w632cb789r6860dae9ccdf744c@mail.gmail.com> (raw)
In-Reply-To: <m3y6hayhv1.fsf@intrepid.localdomain>

On Mon, Mar 29, 2010 at 1:48 PM, Krzysztof Halasa <khc@pm.waw.pl> wrote:
> "Luis R. Rodriguez" <mcgrof@gmail.com> writes:
>
>>> But... isn't the modifying of the regulatory.bin (the US part of it)
>>> to include channels valid in e.g. Europe breaking the (US) rules?
>>
>> Not if you sign off on it, which is exactly why the whole singing
>> thing was invented. You would do this if say, you sell an AP and you
>> verify and tested regulatory compliance against a different regulatory
>> region.
>
> So what exactly do I change? Can the regulatory.bin change the default
> country?

Huh?

> Remember I need to be compliant to the US freq sets as well - when the
> regdomain is set to US. IOW I can't allow the user operating the device
> to set e.g. channel 12 when the user selects country=US (so there is a
> big difference between country 0=US and the real country=US).

Huh?

>> country code programmed to 0 is defined by Atheros documentation to be
>> in the "US".
>
> But the driver says:
> ath: EEPROM regdomain: 0x0
> ath: EEPROM indicates default country code should be used
> ath: doing EEPROM country->regdmn map search
> ath: country maps to regdmn code: 0x3a
> ath: Country alpha2 being used: US
> ath: Regpair used: 0x3a
>
> At least for the driver 0 doesn't mean US, it means "default country".
> Perhaps the meaning of "default country" depends on maybe location of
> the hw and/or sw manufacturer?

I just pointed to some documentation for you which indicated 0x0 means "US".

> Then maybe what I really need to do is substituting "EU" as the default
> country and enforcing EU restrictions, even when the country selected by
> the user is outside EU (e.g. enforcing EU+US in US)?
> And when the user gets a card with country=US (not 0), the EU
> restictions would be dropped (when physically in USA)?
>
> I think this all reduces to the meaning of country=0 for cards sold (in
> this case) in Europe (and maybe manufactured here).
>
>
> If the driver said "EEPROM regdomain: 0x0 = US" I'd return the cards to
> the manufacturer, simple (realistically they'd fix the EEPROM instead).

Whatever works for you. I'm telling you what Atheros supports on its
documentation, if an ODM does something wacky, that's on them.

  Luis