ath9k: Use a separate TX gain table for WZR-HP-G450H

The Buffalo device WZR-HP-G450H uses the index 3 for TX gain,
which is set to the high_power table currently. Later variants
of the router use the same index, but instead refer to the
low_ob_db gain table. This is not handled in the driver since
there is no way to distinguish board revisions and the high_power
table is used (incorrectly) for the newer variants.

By default, devices based on AR9300 using the TX gain index 3 have
to use the high_power table. To make sure that WZR-HP-G450H is not
broken when the high_power table is updated, use a separate array
based on information obtained from the platform data.

The current situation where only the original variant of WZR-HP-G450H
works properly stays unchanged.

Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 9 insertions, 3 deletions

diff --git a/drivers/net/wireless/ath/ath9k/ar9003_hw.c b/drivers/net/wireless/ath/ath9k/ar9003_hw.c
index 4e8ae4a79dc0..29613ebbc5d7 100644
--- a/drivers/net/wireless/ath/ath9k/ar9003_hw.c
+++ b/drivers/net/wireless/ath/ath9k/ar9003_hw.c
@@ -17,6 +17,7 @@
 #include "hw.h"
 #include "ar9003_mac.h"
 #include "ar9003_2p2_initvals.h"
+#include "ar9003_buffalo_initvals.h"
 #include "ar9485_initvals.h"
 #include "ar9340_initvals.h"
 #include "ar9330_1p1_initvals.h"
@@ -592,9 +593,14 @@ static void ar9003_tx_gain_table_mode3(struct ath_hw *ah)
         else if (AR_SREV_9565(ah))
                 INIT_INI_ARRAY(&ah->iniModesTxGain,
                                ar9565_1p0_modes_high_power_tx_gain_table);
-        else
-                INIT_INI_ARRAY(&ah->iniModesTxGain,
-                        ar9300Modes_high_power_tx_gain_table_2p2);
+        else {
+                if (ah->config.tx_gain_buffalo)
+                        INIT_INI_ARRAY(&ah->iniModesTxGain,
+                                       ar9300Modes_high_power_tx_gain_table_buffalo);
+                else
+                        INIT_INI_ARRAY(&ah->iniModesTxGain,
+                                       ar9300Modes_high_power_tx_gain_table_2p2);
+        }
 }
 
 static void ar9003_tx_gain_table_mode4(struct ath_hw *ah)