[ath9k-devel] ath9k regulatory

[Luis R. Rodriguez <lrodriguez@atheros.com>]

On Mon, Jan 26, 2009 at 05:35:13AM -0800, Zoltan Devai wrote:
> Hi,
> 
> I'm using a TP-Link TL-WN861N card. What could be the reason that channels 12 and 13 are
> not allowed ?
> Using compat-wireless 2009-01-25.
> Relevant dmesg output:
> 
> cfg80211: Using static regulatory domain info
> cfg80211: Regulatory domain: US
>         (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
>         (2402000 KHz - 2472000 KHz @ 40000 KHz), (600 mBi, 2700 mBm)
>         (5170000 KHz - 5190000 KHz @ 40000 KHz), (600 mBi, 2300 mBm)
>         (5190000 KHz - 5210000 KHz @ 40000 KHz), (600 mBi, 2300 mBm)
>         (5210000 KHz - 5230000 KHz @ 40000 KHz), (600 mBi, 2300 mBm)
>         (5230000 KHz - 5330000 KHz @ 40000 KHz), (600 mBi, 2300 mBm)
>         (5735000 KHz - 5835000 KHz @ 40000 KHz), (600 mBi, 3000 mBm)
> cfg80211: Calling CRDA for country: DE
> cfg80211: Regulatory domain changed to country: DE
>         (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
>         (2400000 KHz - 2483500 KHz @ 40000 KHz), (N/A, 2000 mBm)
>         (5150000 KHz - 5255000 KHz @ 40000 KHz), (N/A, 2301 mBm)
>         (5470000 KHz - 5650000 KHz @ 40000 KHz), (N/A, 3000 mBm)
> ath9k: 0.1
> PCI: enabling device 0000:00:02.0 (0140 -> 0142)
> ath9k: 2MHz channel: 2412, channelFlags: 0x300e0
> ath9k: 2MHz channel: 2417, channelFlags: 0x300e0
> ath9k: 2MHz channel: 2422, channelFlags: 0x300e0
> ath9k: 2MHz channel: 2427, channelFlags: 0x300e0
> ath9k: 2MHz channel: 2432, channelFlags: 0x700e0
> ath9k: 2MHz channel: 2437, channelFlags: 0x700e0
> ath9k: 2MHz channel: 2442, channelFlags: 0x700e0
> ath9k: 2MHz channel: 2447, channelFlags: 0x500e0
> ath9k: 2MHz channel: 2452, channelFlags: 0x500e0
> ath9k: 2MHz channel: 2457, channelFlags: 0x500e0
> ath9k: 2MHz channel: 2462, channelFlags: 0x500e0
> ath9k: Rate:  1Mbps, ratecode: 27
> ath9k: Rate:  2Mbps, ratecode: 26
> ath9k: Rate:  5Mbps, ratecode: 25
> ath9k: Rate: 11Mbps, ratecode: 24
> ath9k: Rate:  6Mbps, ratecode: 11
> ath9k: Rate:  9Mbps, ratecode: 15
> ath9k: Rate: 12Mbps, ratecode: 10
> ath9k: Rate: 18Mbps, ratecode: 14
> ath9k: Rate: 24Mbps, ratecode:  9
> ath9k: Rate: 36Mbps, ratecode: 13
> ath9k: Rate: 48Mbps, ratecode:  8
> ath9k: Rate: 54Mbps, ratecode: 12
> ath9k: Rate:  6Mbps, ratecode: 11
> ath9k: Rate:  9Mbps, ratecode: 15
> ath9k: Rate: 12Mbps, ratecode: 10
> ath9k: Rate: 18Mbps, ratecode: 14
> ath9k: Rate: 24Mbps, ratecode:  9
> ath9k: Rate: 36Mbps, ratecode: 13
> ath9k: Rate: 48Mbps, ratecode:  8
> ath9k: Rate: 54Mbps, ratecode: 12
> ath9k: tx DMA: 512 buffers 1 desc/buf
> ath9k: tx DMA map: ffc08000 (73728) -> 1f80000 (73728)
> ath9k: beacon DMA: 1 buffers 1 desc/buf
> ath9k: beacon DMA map: ffc1a000 (144) -> 1eb3000 (144)
> ath9k: cachelsz 32 rxbufsize 3872
> ath9k: rx DMA: 512 buffers 1 desc/buf
> ath9k: rx DMA map: ffc1b000 (73728) -> 1fa0000 (73728)
> phy0: Selected rate control algorithm 'ath9k_rate_control'
> Registered led device: ath9k-phy0:radio
> Registered led device: ath9k-phy0:assoc
> Registered led device: ath9k-phy0:tx
> Registered led device: ath9k-phy0:rx
> phy0: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xc2900000, irq=27

I take it the second DE regulatory request was yours? Anyway -- since
I am not seeing any print out during ath9k's initialization on regulatory
it would seem your card uses one of the built-in regulatory domains.

You can use iw to see your allowed channels:

iw list

If your regulatory domain does not allow for it you will not be able to use that
channel.

To confirm you can recompile ath9k with debugging enabled with the patch
attached applied. Then load ath9k as follows:

insmod drivers/net/wireless/ath9k/ath9k.ko debug=0x00000080

0x00000080 is ATH_DBG_REGULATORY so this will show all regulatory debug prints.

  Luis

From: Luis R. Rodriguez <lrodriguez@atheros.com>
Date: Mon, 26 Jan 2009 06:41:48 -0800
Subject: [PATCH] ath9k: fix debug print on regd

With debugging enabled and with ATH_DBG_REGULATORY
selected we wouldn't get the full print out of one line,
reason is we used "," instead of nothing to separate two
lines.

Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
---
 drivers/net/wireless/ath9k/regd.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/net/wireless/ath9k/regd.c b/drivers/net/wireless/ath9k/regd.c
index 90f0c98..ec88f78 100644
--- a/drivers/net/wireless/ath9k/regd.c
+++ b/drivers/net/wireless/ath9k/regd.c
@@ -447,7 +447,7 @@ int ath9k_regd_init(struct ath_hal *ah)
 	}
 
 	DPRINTF(ah->ah_sc, ATH_DBG_REGULATORY,
-		"Country alpha2 being used: %c%c\n",
+		"Country alpha2 being used: %c%c\n"
 		"Regpair detected: 0x%0x\n",
 		ah->alpha2[0], ah->alpha2[1],
 		ah->regpair->regDmnEnum);
-- 
1.5.6.4