From 0e44d48cbb010db492a27302b247049d5d43e065 Mon Sep 17 00:00:00 2001 From: Mohammed Shafi Shajakhan Date: Fri, 17 Jun 2011 14:08:42 +0530 Subject: ath9k_hw: make sure PAPRD training is properly done checking the status of PAPRD_AGC2_POWER(Log(ADC_power) measured after last gain-change in dB) field suggests whether the PAPRD is completely/properly done. This is an additional check apart from polling for PAPRD done bit being set. Susinder suggests that the ideal power range value should be 0xf0 to 0xfe. With AR9382 we do have the values in this range. to have a common check for all platforms we take agc2_power should be atleast greater than 0xe0 Cc: susinder@qca.qualcomm.com Cc: senthilb@qca.qualcomm.com Cc: kmuthusa@qca.qualcomm.com Signed-off-by: Mohammed Shafi Shajakhan Signed-off-by: John W. Linville --- drivers/net/wireless/ath/ath9k/ar9003_paprd.c | 21 ++++++++++++++++++++- 1 file changed, 20 insertions(+), 1 deletion(-) (limited to 'drivers/net/wireless/ath/ath9k/ar9003_paprd.c') diff --git a/drivers/net/wireless/ath/ath9k/ar9003_paprd.c b/drivers/net/wireless/ath/ath9k/ar9003_paprd.c index 2e7f0f2567eb..fc9c08f513cf 100644 --- a/drivers/net/wireless/ath/ath9k/ar9003_paprd.c +++ b/drivers/net/wireless/ath/ath9k/ar9003_paprd.c @@ -785,7 +785,26 @@ EXPORT_SYMBOL(ar9003_paprd_init_table); bool ar9003_paprd_is_done(struct ath_hw *ah) { - return !!REG_READ_FIELD(ah, AR_PHY_PAPRD_TRAINER_STAT1, + int paprd_done, agc2_pwr; + paprd_done = REG_READ_FIELD(ah, AR_PHY_PAPRD_TRAINER_STAT1, AR_PHY_PAPRD_TRAINER_STAT1_PAPRD_TRAIN_DONE); + + if (paprd_done == 0x1) { + agc2_pwr = REG_READ_FIELD(ah, AR_PHY_PAPRD_TRAINER_STAT1, + AR_PHY_PAPRD_TRAINER_STAT1_PAPRD_AGC2_PWR); + + ath_dbg(ath9k_hw_common(ah), ATH_DBG_CALIBRATE, + "AGC2_PWR = 0x%x training done = 0x%x\n", + agc2_pwr, paprd_done); + /* + * agc2_pwr range should not be less than 'IDEAL_AGC2_PWR_CHANGE' + * when the training is completely done, otherwise retraining is + * done to make sure the value is in ideal range + */ + if (agc2_pwr <= PAPRD_IDEAL_AGC2_PWR_RANGE) + paprd_done = 0; + } + + return !!paprd_done; } EXPORT_SYMBOL(ar9003_paprd_is_done); -- cgit v1.2.3-59-g8ed1b