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ath9k_hw: Fix throughput drops in HT40 mode for AR9287 chips

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Doing adc gain calibration for AR9287 chips is causing
throughput drops in HT40 mode. Remove ADC Gain from supported
calibration list.

Signed-off-by: Rajkumar Manoharan <rmanoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Rajkumar Manoharan 2011-03-15 19:55:36 +05:30 committed by John W. Linville
parent 6d64ab7f92
commit 81544026e4
1 changed files with 35 additions and 8 deletions
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43
drivers/net/wireless/ath/ath9k/ar9002_calib.c
View file

@ -26,6 +26,27 @@ enum ar9002_cal_types {
IQ_MISMATCH_CAL = BIT(2),
};
static bool ar9002_hw_is_cal_supported(struct ath_hw *ah,
struct ath9k_channel *chan,
enum ar9002_cal_types cal_type)
{
bool supported = false;
switch (ah->supp_cals & cal_type) {
case IQ_MISMATCH_CAL:
/* Run IQ Mismatch for non-CCK only */
if (!IS_CHAN_B(chan))
supported = true;
break;
case ADC_GAIN_CAL:
case ADC_DC_CAL:
/* Run ADC Gain Cal for non-CCK & non 2GHz-HT20 only */
if (!IS_CHAN_B(chan) &&
!(IS_CHAN_2GHZ(chan) && IS_CHAN_HT20(chan)))
supported = true;
break;
}
return supported;
}
static void ar9002_hw_setup_calibration(struct ath_hw *ah,
struct ath9k_cal_list *currCal)
@ -858,26 +879,32 @@ static bool ar9002_hw_init_cal(struct ath_hw *ah, struct ath9k_channel *chan)
if (AR_SREV_9100(ah) || AR_SREV_9160_10_OR_LATER(ah)) {
ah->supp_cals = IQ_MISMATCH_CAL;
if (AR_SREV_9160_10_OR_LATER(ah) &&
!(IS_CHAN_2GHZ(chan) && IS_CHAN_HT20(chan))) {
if (AR_SREV_9160_10_OR_LATER(ah))
ah->supp_cals |= ADC_GAIN_CAL | ADC_DC_CAL;
if (AR_SREV_9287(ah))
ah->supp_cals &= ~ADC_GAIN_CAL;
if (ar9002_hw_is_cal_supported(ah, chan, ADC_GAIN_CAL)) {
INIT_CAL(&ah->adcgain_caldata);
INSERT_CAL(ah, &ah->adcgain_caldata);
ath_dbg(common, ATH_DBG_CALIBRATE,
"enabling ADC Gain Calibration.\n");
"enabling ADC Gain Calibration.\n");
}
if (ar9002_hw_is_cal_supported(ah, chan, ADC_DC_CAL)) {
INIT_CAL(&ah->adcdc_caldata);
INSERT_CAL(ah, &ah->adcdc_caldata);
ath_dbg(common, ATH_DBG_CALIBRATE,
"enabling ADC DC Calibration.\n");
"enabling ADC DC Calibration.\n");
}
INIT_CAL(&ah->iq_caldata);
INSERT_CAL(ah, &ah->iq_caldata);
ath_dbg(common, ATH_DBG_CALIBRATE,
"enabling IQ Calibration.\n");
if (ar9002_hw_is_cal_supported(ah, chan, IQ_MISMATCH_CAL)) {
INIT_CAL(&ah->iq_caldata);
INSERT_CAL(ah, &ah->iq_caldata);
ath_dbg(common, ATH_DBG_CALIBRATE,
"enabling IQ Calibration.\n");
}
ah->cal_list_curr = ah->cal_list;