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ath9k_hw: Disable PAPRD for rates with low Tx power

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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 <vasanth@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Vasanthakumar Thiagarajan 2010-12-15 07:30:52 -08:00 committed by John W. Linville
parent 8698bca6b5
commit 7072bf62fb
3 changed files with 45 additions and 15 deletions
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39
drivers/net/wireless/ath/ath9k/ar9003_eeprom.c
View file

@ -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)

20
drivers/net/wireless/ath/ath9k/ar9003_paprd.c
View file

@ -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],

1
drivers/net/wireless/ath/ath9k/hw.h
View file

@ -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];
/*