2008/7/17 Andrea Tarasconi <Andrea.Tarasconi <at> essentia.it>:
> Dear Sir/Madam,
>
>         even if we have an official TLA with Atheros, we cannot have the
> needed support about few RF Register usage, so we are looking for somebody
> giving us the needed support.
>

That looks weird 

> What support we are looking for the Atheros AR5414
> =======================================
> The support we need to sombody very well knowing the Atheros chip-set are
> both related to the RF Registers (not documented):
>
> - Operating in the 802.11a mode, how to move the base systhetized frequency
> to 4600 or 4700 MHz and how to move to 5500 or 5600 MHz instead of the 4800
> MHz default.
>
> - How to change the RF channel stepping from the standard 2.5 and 5 MHz
> stepping to a  more fine 1 and 2 MHz stepping.
>
> Unfortunately there is no official documentation about and we were not able
> to guess the correct numbers to write into the RF registers because the
> structure of the RF Registers is very complex and quite completely not
> documented!
>
> Any help will be appreciated.
>
> A reward of 5000 USD will be provided to who will be able to give us the two
> solutions (just the consultancy), otherwise a reward of 2000 USD will be
> provide to who will give us only one solution.
>
> Please feel free to forward this email to anybody you think may be able to
> help us directly or indirectly forwarding to others.
>
> Thank you again for your cooperation.
> Kind regards,
> Andrea
>
> Should you have any question, please do not hesitate to contact us.
> Best regards,
>
> Dr. Andrea Tarasconi, Technical Director (CTO).
>
>             Direct phone: +39 0522 9483.22
>             Mobile: +39 335 8049677
>             E-mail: andrea.tarasconi <at> essentia.it
>
> Essentia S.p.A. – Telecomunicazioni & Sicurezza
>
> Head Quarter: Via G.B. Vico, 29 - 42040 Cella (RE), Italy
> Phone: +39 0522 9483.11 - Fax: +39 0522 9483.33
> Worldwide Web: www.essentia.it - E-mail: info <at> essentia.it
>

If you really have a TLA with Atheros then you should have access to
ART (Atheros Radio Test) source, it seems that art has a table that
contains some infos about rf regs, i was able to extract this table
from a memory dump i got but i'm not sure its for 5413. I guess since
you have art source, you'll be able to get much more infos from it (we
don't have such infos since we don't have NDA/TLA with Atheros).

From there as Louai said PLL supports channel bandwith of
5/10/20/40Mhz so you won't be able to use another channel bandwidth,
also from what we have (check out ath5k source -phy.c- ) it seems
channels < 4800 are considered 2Ghz channels so 4800 seems to be the
lower limit of 5Ghz radio. 4800Mhz is also used as a reference
frequency when calculating channel steps (we calculate steps by
abstracting 4800 from channel frequency, eg data0 =
ath5k_hw_bitswap(((c - 4800) / 20 << 2), 8);). I don't know if it's
possible to change 4800 to something else by passing some tweaked
values to rfregs but i haven't seen that on any atheros driver i've
checked (even mikrotik's driver doesn't support stepping < 2.5, check
out http://www.miro.co.za/upload%5CWireless%5CFrequency-Upgrade.pdf).

-- 
GPG ID: 0xD21DB2DB
As you read this post global entropy rises. Have Fun 
Nick
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