[ath9k-devel] AR9380 + hostapd + HT over 802.11a

[Mihai Moldovan <ionic@ionic.de>]

* On 31.05.2011 08:38 PM, Mihai Moldovan wrote:
> Rebuilding the Kernel soon... well as soon as I revert the regd.c patch. :)

Hmm, new patch, but also some bad news: all 5Ghz channels are AP-locked 
when using German regdomain, most of them even disabled. iw list:

Frequencies:
                         * 5180 MHz [36] (18.0 dBm) (passive scanning, 
no IBSS)
                         * 5200 MHz [40] (18.0 dBm) (passive scanning, 
no IBSS)
                         * 5220 MHz [44] (18.0 dBm) (passive scanning, 
no IBSS)
                         * 5240 MHz [48] (18.0 dBm) (passive scanning, 
no IBSS)
                         * 5260 MHz [52] (disabled)
                         * 5280 MHz [56] (disabled)
                         * 5300 MHz [60] (disabled)
                         * 5320 MHz [64] (disabled)
                         * 5500 MHz [100] (disabled)
                         * 5520 MHz [104] (disabled)
                         * 5540 MHz [108] (disabled)
                         * 5560 MHz [112] (disabled)
                         * 5580 MHz [116] (disabled)
                         * 5600 MHz [120] (disabled)
                         * 5620 MHz [124] (disabled)
                         * 5640 MHz [128] (disabled)
                         * 5660 MHz [132] (disabled)
                         * 5680 MHz [136] (disabled)
                         * 5700 MHz [140] (disabled)
                         * 5745 MHz [149] (18.0 dBm) (passive scanning, 
no IBSS)
                         * 5765 MHz [153] (18.0 dBm) (passive scanning, 
no IBSS)
                         * 5785 MHz [157] (18.0 dBm) (passive scanning, 
no IBSS)
                         * 5805 MHz [161] (18.0 dBm) (passive scanning, 
no IBSS)
                         * 5825 MHz [165] (18.0 dBm) (passive scanning, 
no IBSS)

That's weird, as we do have 802.11n up to 300MBit/s routers here, so I 
can't believe it's locked due to legal regulations. My university is 
running some of those WLAN APs, for instance.



Adapted patch against 2.6.38.6:

diff -uhr linux-2.6.38.6-orig/drivers/net/wireless/ath/ath9k/init.c 
linux-2.6.38.6/drivers/net/wireless/ath/ath9k/init.c
--- linux-2.6.38.6-orig/drivers/net/wireless/ath/ath9k/init.c 
2011-05-10 00:16:23.000000000 +0200
+++ linux-2.6.38.6/drivers/net/wireless/ath/ath9k/init.c 
2011-05-31 21:01:51.253906201 +0200
@@ -33,6 +33,11 @@
  module_param_named(nohwcrypt, ath9k_modparam_nohwcrypt, int, 0444);
  MODULE_PARM_DESC(nohwcrypt, "Disable hardware encryption");

+static int modparam_override_eeprom_regdomain = -1;
+module_param_named(override_eeprom_regdomain,
+                   modparam_override_eeprom_regdomain, int, S_IRUGO);
+MODULE_PARM_DESC(override_eeprom_regdomain, "Override regdomain 
hardcoded in EEPROM with this value (DANGEROUS).");
+
  int led_blink;
  module_param_named(blink, led_blink, int, 0444);
  MODULE_PARM_DESC(blink, "Enable LED blink on activity");
@@ -635,6 +640,7 @@
  void ath9k_set_hw_capab(struct ath_softc *sc, struct ieee80211_hw *hw)
  {
         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
+        struct ath_regulatory *regulatory = 
ath9k_hw_regulatory(sc->sc_ah);

         hw->flags = IEEE80211_HW_RX_INCLUDES_FCS |
                 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING |
@@ -688,6 +694,14 @@
                         setup_ht_cap(sc, 
&sc->sbands[IEEE80211_BAND_5GHZ].ht_cap);
         }

+        if (modparam_override_eeprom_regdomain != -1) {
+                printk(KERN_ERR "ath9k: DANGER! You're overriding 
EEPROM-defined regulatory domain.\n");
+                printk(KERN_ERR "ath9k: Your card was not certified to 
operate on the domain you choosed.\n");
+                printk(KERN_ERR "ath9k: This might result in a 
violation of your local regulatory rules.\n");
+                printk(KERN_ERR "ath9k: Do not ever do that unless you 
really know what you do!\n");
+                regulatory->current_rd = 
modparam_override_eeprom_regdomain;
+        }
+
         SET_IEEE80211_PERM_ADDR(hw, common->macaddr);
  }


I guess

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