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ath9k_hw: make sure PAPRD training is properly done

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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 <mohammed@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Mohammed Shafi Shajakhan 2011-06-17 14:08:42 +05:30 committed by John W. Linville
parent 81dc67601a
commit 0e44d48cbb
2 changed files with 23 additions and 3 deletions
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21
drivers/net/wireless/ath/ath9k/ar9003_paprd.c
View File

@ -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);

5
drivers/net/wireless/ath/ath9k/hw.h
View File

@ -157,8 +157,9 @@
#define ATH9K_HW_RX_HP_QDEPTH 16
#define ATH9K_HW_RX_LP_QDEPTH 128
#define PAPRD_GAIN_TABLE_ENTRIES 32
#define PAPRD_TABLE_SZ 24
#define PAPRD_GAIN_TABLE_ENTRIES 32
#define PAPRD_TABLE_SZ 24
#define PAPRD_IDEAL_AGC2_PWR_RANGE 0xe0
enum ath_hw_txq_subtype {
ATH_TXQ_AC_BE = 0,