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Date: Wed, 5 Jun 2013 20:59:14 +0800
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Subject: Re: carl9170:5/10 MHz Channel Support on carl9170
From: "C.B. Wang" <wtwangcb@gmail.com>
To: Christian Lamparter <chunkeey@googlemail.com>
Cc: linux-wireless@vger.kernel.org
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Sender: linux-wireless-owner@vger.kernel.org

Hi

I've read the "otus" vendor driver and found that in the source file
/HalPlus/OTUS_FB50/hpreg.h on
line 1915,the comment says "Temporary discard channel that BW < 20MHz
(5 or 10MHz)   */
                            /*   Our architecture does not implemnt it"
I think either the driver does not implement the 5/10 channels or
worse,the ar9170 chip does
not support 5/10 mhz channel at all.
But 802.11j has 10mhz channel support.To comply with the 802.11j
standard,the chip should
support 10mhz channel width.

I know ar9170 support 4.9ghz channels.But does it also support
non-standard bands like 2.3ghz and 6.0ghz?

Also the ar9170 MAC was indeed designed by ZyDaS berfore the company
was taken over by
Atheros.It has some problems with long distance links.

On 6/5/13, Christian Lamparter <chunkeey@googlemail.com> wrote:
> On Tuesday, June 04, 2013 03:20:26 PM C.B. Wang wrote:
>> I want to know if the ar9170 chip support 5/10 mhz channels.
> Maybe. if you care about it, you'll have to look for clues in
> the original vendor driver (otus - was part of the kernel's staging/
> directory for < 2.6.39?) and the original vendor firmware
> (ar9170fw - you can find a git-tree @ git.sipsolutions.com).
>
> Anyway, if you need a definitive "yes" or "no", you should
> ask Qualcomm Atheros directly. As I can only tell something
> about the MAC [which does have a 802.11j Mode. It can be
> enabled by setting bit 3 in AR9170_MAC_REG_POWER_STATE_CTRL.]
> However, I don't have any information about the PHY/FEM/RF
> and BB.
>
>> The datasheet says it supports 802.11j, but the carl9170
>> driver does not provide support.
> Again, talk to Qualcomm Atheros to find out what needs to be
> done in order to support it.
>
>> Also the radio chip ar9104 has tuning range from 2.3-2.5ghz and
>> 4.9-6.1ghz,but the driver does not provide any support for these
>> super channels.
> Some AR9170 devices do indeed support the 4.9 GHz channels
> (out of the box). e.g.:
> 	Frequencies:
> 	 * 4920 MHz [-16] (18.0 dBm)
> 	 * 4940 MHz [-12] (18.0 dBm)
> 	 * 4960 MHz [-8] (18.0 dBm)
> 	 * 4980 MHz [-4] (18.0 dBm)
> 	 * 5040 MHz [8] (18.0 dBm)
> 	 * 5060 MHz [12] (18.0 dBm)
> 	 * 5080 MHz [16] (18.0 dBm)
>
> However, the device needs to be calibrated for the frequencies
> to use them legally (the Japanese Market). Look in your kernel
> logs when the driver is loaded; There should be something like
> this:
>
>> ath: EEPROM regdomain: 0x8xyz
>> ath: EEPROM indicates we should expect a country code
>> ath: doing EEPROM country->regdmn map search
>> ath: Country alpha2 being used: JP <--- JaPan
>
> If your country code is not "JP", then you'll have to talk to
> the manufacturer.
>
> Regards,
> 	Chr
>