diff options
author | Sujith <Sujith.Manoharan@atheros.com> | 2009-04-13 21:56:59 +0530 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-07-02 16:50:11 -0700 |
commit | e581d50270c1c81897850a666bb91b068b83aa26 (patch) | |
tree | 6e436b1d79836c916b7656b37a3bd6d35607ae50 | |
parent | 4f6846f57b43350f92e78cff835250f600b0a6f9 (diff) |
ath9k: Fix bug in calibration initialization
commit 04d19ddd254b404703151ab25aa5041e50ff40f7 upstream.
This patch fixes a bug in ath9k_hw_init_cal() where the wrong
calibration was being done for non-AR9285 chipsets.
Also add a few helpful comments.
Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
-rw-r--r-- | drivers/net/wireless/ath9k/calib.c | 61 |
1 files changed, 22 insertions, 39 deletions
diff --git a/drivers/net/wireless/ath9k/calib.c b/drivers/net/wireless/ath9k/calib.c index e2d62e97131c..b588ccd41a11 100644 --- a/drivers/net/wireless/ath9k/calib.c +++ b/drivers/net/wireless/ath9k/calib.c @@ -919,83 +919,66 @@ static bool ar9285_clc(struct ath_hw *ah, struct ath9k_channel *chan) return true; } -bool ath9k_hw_init_cal(struct ath_hw *ah, - struct ath9k_channel *chan) +bool ath9k_hw_init_cal(struct ath_hw *ah, struct ath9k_channel *chan) { if (AR_SREV_9285(ah) && AR_SREV_9285_12_OR_LATER(ah)) { if (!ar9285_clc(ah, chan)) return false; - } else if (AR_SREV_9280_10_OR_LATER(ah)) { - REG_CLR_BIT(ah, AR_PHY_ADC_CTL, AR_PHY_ADC_CTL_OFF_PWDADC); - REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_FLTR_CAL); - REG_CLR_BIT(ah, AR_PHY_CL_CAL_CTL, AR_PHY_CL_CAL_ENABLE); + } else { + if (AR_SREV_9280_10_OR_LATER(ah)) { + REG_CLR_BIT(ah, AR_PHY_ADC_CTL, AR_PHY_ADC_CTL_OFF_PWDADC); + REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_FLTR_CAL); + } - /* Kick off the cal */ + /* Calibrate the AGC */ REG_WRITE(ah, AR_PHY_AGC_CONTROL, - REG_READ(ah, AR_PHY_AGC_CONTROL) | - AR_PHY_AGC_CONTROL_CAL); + REG_READ(ah, AR_PHY_AGC_CONTROL) | + AR_PHY_AGC_CONTROL_CAL); - if (!ath9k_hw_wait(ah, AR_PHY_AGC_CONTROL, - AR_PHY_AGC_CONTROL_CAL, 0, - AH_WAIT_TIMEOUT)) { + /* Poll for offset calibration complete */ + if (!ath9k_hw_wait(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_CAL, + 0, AH_WAIT_TIMEOUT)) { DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE, "offset calibration failed to complete in 1ms; " "noisy environment?\n"); return false; } - REG_CLR_BIT(ah, AR_PHY_ADC_CTL, AR_PHY_ADC_CTL_OFF_PWDADC); - REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_FLTR_CAL); - REG_SET_BIT(ah, AR_PHY_CL_CAL_CTL, AR_PHY_CL_CAL_ENABLE); - } - - /* Calibrate the AGC */ - REG_WRITE(ah, AR_PHY_AGC_CONTROL, - REG_READ(ah, AR_PHY_AGC_CONTROL) | - AR_PHY_AGC_CONTROL_CAL); - - if (!ath9k_hw_wait(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_CAL, - 0, AH_WAIT_TIMEOUT)) { - DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE, - "offset calibration failed to complete in 1ms; " - "noisy environment?\n"); - return false; - } - - if (AR_SREV_9280_10_OR_LATER(ah)) { - REG_SET_BIT(ah, AR_PHY_ADC_CTL, AR_PHY_ADC_CTL_OFF_PWDADC); - REG_CLR_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_FLTR_CAL); + if (AR_SREV_9280_10_OR_LATER(ah)) { + REG_SET_BIT(ah, AR_PHY_ADC_CTL, AR_PHY_ADC_CTL_OFF_PWDADC); + REG_CLR_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_FLTR_CAL); + } } /* Do PA Calibration */ if (AR_SREV_9285(ah) && AR_SREV_9285_11_OR_LATER(ah)) ath9k_hw_9285_pa_cal(ah); - /* Do NF Calibration */ + /* Do NF Calibration after DC offset and other calibrations */ REG_WRITE(ah, AR_PHY_AGC_CONTROL, - REG_READ(ah, AR_PHY_AGC_CONTROL) | - AR_PHY_AGC_CONTROL_NF); + REG_READ(ah, AR_PHY_AGC_CONTROL) | AR_PHY_AGC_CONTROL_NF); ah->cal_list = ah->cal_list_last = ah->cal_list_curr = NULL; + /* Enable IQ, ADC Gain and ADC DC offset CALs */ if (AR_SREV_9100(ah) || AR_SREV_9160_10_OR_LATER(ah)) { if (ath9k_hw_iscal_supported(ah, ADC_GAIN_CAL)) { INIT_CAL(&ah->adcgain_caldata); INSERT_CAL(ah, &ah->adcgain_caldata); DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE, - "enabling ADC Gain Calibration.\n"); + "enabling ADC Gain Calibration.\n"); } if (ath9k_hw_iscal_supported(ah, ADC_DC_CAL)) { INIT_CAL(&ah->adcdc_caldata); INSERT_CAL(ah, &ah->adcdc_caldata); DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE, - "enabling ADC DC Calibration.\n"); + "enabling ADC DC Calibration.\n"); } if (ath9k_hw_iscal_supported(ah, IQ_MISMATCH_CAL)) { INIT_CAL(&ah->iq_caldata); INSERT_CAL(ah, &ah->iq_caldata); DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE, - "enabling IQ Calibration.\n"); + "enabling IQ Calibration.\n"); } ah->cal_list_curr = ah->cal_list; |