From d88525e8fdc00c0078d38353caffc29e5a9c70cc Mon Sep 17 00:00:00 2001 From: Rajkumar Manoharan Date: Wed, 6 Apr 2011 21:42:52 +0530 Subject: ath9k_hw: Fix instable target power control b/w CCK/OFDM The problem is that when the attenuation is increased, the rate will start to drop from MCS7 -> MCS6, and finally will see MCS1 -> CCK_11Mbps. When the rate is changed b/w CCK and OFDM, it will use register desired_scale to calculate how much tx gain need to change. The output power with the same tx gain for CCK and OFDM modulated signals are different. This difference is constant for AR9280 but not AR9285/AR9271. It has different PA architecture a constant. So it should be calibrated against this PA characteristic. The driver has to read the calibrated values from EEPROM and set the tx power registers accordingly. Signed-off-by: Rajkumar Manoharan Acked-by: Felix Fietkau Signed-off-by: John W. Linville --- drivers/net/wireless/ath/ath9k/eeprom.h | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'drivers/net/wireless/ath/ath9k/eeprom.h') diff --git a/drivers/net/wireless/ath/ath9k/eeprom.h b/drivers/net/wireless/ath/ath9k/eeprom.h index bd82447f5b78..3e316133f114 100644 --- a/drivers/net/wireless/ath/ath9k/eeprom.h +++ b/drivers/net/wireless/ath/ath9k/eeprom.h @@ -436,7 +436,11 @@ struct modal_eep_4k_header { u8 db2_2:4, db2_3:4; u8 db2_4:4, reserved:4; #endif - u8 futureModal[4]; + u8 tx_diversity; + u8 flc_pwr_thresh; + u8 bb_scale_smrt_antenna; +#define EEP_4K_BB_DESIRED_SCALE_MASK 0x1f + u8 futureModal[1]; struct spur_chan spurChans[AR_EEPROM_MODAL_SPURS]; } __packed; -- cgit v1.2.1