From 7072bf62fb7abe5a91389d6271da520f29c79326 Mon Sep 17 00:00:00 2001 From: Vasanthakumar Thiagarajan Date: Wed, 15 Dec 2010 07:30:52 -0800 Subject: [PATCH] ath9k_hw: Disable PAPRD for rates with low Tx power When the drop in Tx power for a particular mcs rate exceeds the paprd scale factor, paprd may not work properly. Disable paprd for any such rates. Signed-off-by: Vasanthakumar Thiagarajan Signed-off-by: John W. Linville --- .../net/wireless/ath/ath9k/ar9003_eeprom.c | 39 ++++++++++++++++++- drivers/net/wireless/ath/ath9k/ar9003_paprd.c | 20 +++------- drivers/net/wireless/ath/ath9k/hw.h | 1 + 3 files changed, 45 insertions(+), 15 deletions(-) diff --git a/drivers/net/wireless/ath/ath9k/ar9003_eeprom.c b/drivers/net/wireless/ath/ath9k/ar9003_eeprom.c index 9fa5793abd27..0e9ea35f2fb4 100644 --- a/drivers/net/wireless/ath/ath9k/ar9003_eeprom.c +++ b/drivers/net/wireless/ath/ath9k/ar9003_eeprom.c @@ -4751,16 +4751,53 @@ static void ath9k_hw_ar9300_set_txpower(struct ath_hw *ah, { struct ath_regulatory *regulatory = ath9k_hw_regulatory(ah); struct ath_common *common = ath9k_hw_common(ah); + struct ar9300_eeprom *eep = &ah->eeprom.ar9300_eep; u8 targetPowerValT2[ar9300RateSize]; - unsigned int i = 0; + u8 target_power_val_t2_eep[ar9300RateSize]; + unsigned int i = 0, paprd_scale_factor = 0; + u8 pwr_idx, min_pwridx; ar9003_hw_set_target_power_eeprom(ah, chan->channel, targetPowerValT2); + + if (ah->eep_ops->get_eeprom(ah, EEP_PAPRD)) { + if (IS_CHAN_2GHZ(chan)) + ah->paprd_ratemask = (IS_CHAN_HT40(chan) ? + le32_to_cpu(eep->modalHeader2G.papdRateMaskHt40) : + le32_to_cpu(eep->modalHeader2G.papdRateMaskHt20)) + & AR9300_PAPRD_RATE_MASK; + else + ah->paprd_ratemask = (IS_CHAN_HT40(chan) ? + le32_to_cpu(eep->modalHeader5G.papdRateMaskHt40) : + le32_to_cpu(eep->modalHeader5G.papdRateMaskHt20)) + & AR9300_PAPRD_RATE_MASK; + + memcpy(target_power_val_t2_eep, targetPowerValT2, + sizeof(targetPowerValT2)); + } + ar9003_hw_set_power_per_rate_table(ah, chan, targetPowerValT2, cfgCtl, twiceAntennaReduction, twiceMaxRegulatoryPower, powerLimit); + if (ah->eep_ops->get_eeprom(ah, EEP_PAPRD)) { + paprd_scale_factor = ar9003_get_paprd_scale_factor(ah, chan); + min_pwridx = IS_CHAN_HT40(chan) ? ALL_TARGET_HT40_0_8_16 : + ALL_TARGET_HT20_0_8_16; + + for (i = 0; i < ar9300RateSize; i++) { + if ((ah->paprd_ratemask & (1 << i)) && + (abs(targetPowerValT2[i] - + target_power_val_t2_eep[i]) > + paprd_scale_factor)) { + ah->paprd_ratemask &= ~(1 << i); + ath_dbg(common, ATH_DBG_EEPROM, + "paprd disabled for mcs %d\n", i); + } + } + } + regulatory->max_power_level = 0; for (i = 0; i < ar9300RateSize; i++) { if (targetPowerValT2[i] > regulatory->max_power_level) diff --git a/drivers/net/wireless/ath/ath9k/ar9003_paprd.c b/drivers/net/wireless/ath/ath9k/ar9003_paprd.c index 4c744793b4b6..26cf31cca3ac 100644 --- a/drivers/net/wireless/ath/ath9k/ar9003_paprd.c +++ b/drivers/net/wireless/ath/ath9k/ar9003_paprd.c @@ -87,8 +87,6 @@ static int ar9003_get_training_power_5g(struct ath_hw *ah) static int ar9003_paprd_setup_single_table(struct ath_hw *ah) { struct ath_common *common = ath9k_hw_common(ah); - struct ar9300_eeprom *eep = &ah->eeprom.ar9300_eep; - struct ar9300_modal_eep_header *hdr; static const u32 ctrl0[3] = { AR_PHY_PAPRD_CTRL0_B0, AR_PHY_PAPRD_CTRL0_B1, @@ -99,18 +97,9 @@ static int ar9003_paprd_setup_single_table(struct ath_hw *ah) AR_PHY_PAPRD_CTRL1_B1, AR_PHY_PAPRD_CTRL1_B2 }; - u32 am_mask, ht40_mask; int training_power; int i; - if (ah->curchan && IS_CHAN_5GHZ(ah->curchan)) - hdr = &eep->modalHeader5G; - else - hdr = &eep->modalHeader2G; - - am_mask = le32_to_cpu(hdr->papdRateMaskHt20) & AR9300_PAPRD_RATE_MASK; - ht40_mask = le32_to_cpu(hdr->papdRateMaskHt40) & AR9300_PAPRD_RATE_MASK; - if (IS_CHAN_2GHZ(ah->curchan)) training_power = ar9003_get_training_power_2g(ah); else @@ -126,9 +115,12 @@ static int ar9003_paprd_setup_single_table(struct ath_hw *ah) "Training power: %d, Target power: %d\n", ah->paprd_training_power, ah->paprd_target_power); - REG_RMW_FIELD(ah, AR_PHY_PAPRD_AM2AM, AR_PHY_PAPRD_AM2AM_MASK, am_mask); - REG_RMW_FIELD(ah, AR_PHY_PAPRD_AM2PM, AR_PHY_PAPRD_AM2PM_MASK, am_mask); - REG_RMW_FIELD(ah, AR_PHY_PAPRD_HT40, AR_PHY_PAPRD_HT40_MASK, ht40_mask); + REG_RMW_FIELD(ah, AR_PHY_PAPRD_AM2AM, AR_PHY_PAPRD_AM2AM_MASK, + ah->paprd_ratemask); + REG_RMW_FIELD(ah, AR_PHY_PAPRD_AM2PM, AR_PHY_PAPRD_AM2PM_MASK, + ah->paprd_ratemask); + REG_RMW_FIELD(ah, AR_PHY_PAPRD_HT40, AR_PHY_PAPRD_HT40_MASK, + AR_PHY_PAPRD_HT40_MASK); for (i = 0; i < ah->caps.max_txchains; i++) { REG_RMW_FIELD(ah, ctrl0[i], diff --git a/drivers/net/wireless/ath/ath9k/hw.h b/drivers/net/wireless/ath/ath9k/hw.h index fb64ab841dc1..3a6101ba9837 100644 --- a/drivers/net/wireless/ath/ath9k/hw.h +++ b/drivers/net/wireless/ath/ath9k/hw.h @@ -835,6 +835,7 @@ struct ath_hw { unsigned int paprd_target_power; unsigned int paprd_training_power; + unsigned int paprd_ratemask; u32 paprd_gain_table_entries[PAPRD_GAIN_TABLE_ENTRIES]; u8 paprd_gain_table_index[PAPRD_GAIN_TABLE_ENTRIES]; /* -- 2.20.1