From edf7c060f094f33b68b34b9312688fb823ebc0ff Mon Sep 17 00:00:00 2001 From: Sujith Date: Thu, 12 Feb 2009 10:06:49 +0530 Subject: [PATCH] ath9k: Initialize AGC calibration properly Signed-off-by: Sujith Signed-off-by: John W. Linville --- drivers/net/wireless/ath9k/calib.c | 31 +++++++++++++++++++++++++++++++ drivers/net/wireless/ath9k/phy.h | 4 ++++ 2 files changed, 35 insertions(+) diff --git a/drivers/net/wireless/ath9k/calib.c b/drivers/net/wireless/ath9k/calib.c index 1fc3a08..a7ce8c5 100644 --- a/drivers/net/wireless/ath9k/calib.c +++ b/drivers/net/wireless/ath9k/calib.c @@ -851,6 +851,30 @@ static inline void ath9k_hw_9285_pa_cal(struct ath_hw *ah) bool ath9k_hw_init_cal(struct ath_hw *ah, struct ath9k_channel *chan) { + 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); + + /* Kick off the cal */ + 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)) { + 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); @@ -862,9 +886,16 @@ bool ath9k_hw_init_cal(struct ath_hw *ah, 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); + } + + /* Do PA Calibration */ if (AR_SREV_9285(ah) && AR_SREV_9285_11_OR_LATER(ah)) ath9k_hw_9285_pa_cal(ah); + /* Do NF Calibration */ REG_WRITE(ah, AR_PHY_AGC_CONTROL, REG_READ(ah, AR_PHY_AGC_CONTROL) | AR_PHY_AGC_CONTROL_NF); diff --git a/drivers/net/wireless/ath9k/phy.h b/drivers/net/wireless/ath9k/phy.h index 837a598..4758c37 100644 --- a/drivers/net/wireless/ath9k/phy.h +++ b/drivers/net/wireless/ath9k/phy.h @@ -485,6 +485,10 @@ bool ath9k_hw_init_rf(struct ath_hw *ah, #define AR_PHY_TPCRG5_PD_GAIN_BOUNDARY_4 0x0FC00000 #define AR_PHY_TPCRG5_PD_GAIN_BOUNDARY_4_S 22 +/* Carrier leak calibration control, do it after AGC calibration */ +#define AR_PHY_CL_CAL_CTL 0xA358 +#define AR_PHY_CL_CAL_ENABLE 0x00000002 + #define AR_PHY_POWER_TX_RATE5 0xA38C #define AR_PHY_POWER_TX_RATE6 0xA390 -- 2.7.4