Return-path: Received: from s72.web-hosting.com ([198.187.29.21]:47535 "EHLO s72.web-hosting.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752265Ab3IKGO7 (ORCPT ); Wed, 11 Sep 2013 02:14:59 -0400 From: Sujith Manoharan To: John Linville Cc: linux-wireless@vger.kernel.org Subject: [PATCH 1/3] ath9k: Fix calibration for AR9462 Date: Wed, 11 Sep 2013 11:40:57 +0530 Message-Id: <1378879859-32290-1-git-send-email-sujith@msujith.org> (sfid-20130911_081502_284885_D15A1BF4) Sender: linux-wireless-owner@vger.kernel.org List-ID: From: Sujith Manoharan TX IQ calibration is disabled by default for AR9462, this is done using the initvals (reg 0xa644). But, to compensate for this, the AR_PHY_RX_DELAY register should be set to the max allowed value when performing calibration. Signed-off-by: Sujith Manoharan --- drivers/net/wireless/ath/ath9k/ar9003_calib.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/drivers/net/wireless/ath/ath9k/ar9003_calib.c b/drivers/net/wireless/ath/ath9k/ar9003_calib.c index 6988e1d..6001bc0 100644 --- a/drivers/net/wireless/ath/ath9k/ar9003_calib.c +++ b/drivers/net/wireless/ath/ath9k/ar9003_calib.c @@ -1019,6 +1019,7 @@ static bool ar9003_hw_init_cal(struct ath_hw *ah, bool is_reusable = true, status = true; bool run_rtt_cal = false, run_agc_cal, sep_iq_cal = false; bool rtt = !!(ah->caps.hw_caps & ATH9K_HW_CAP_RTT); + u32 rx_delay = 0; u32 agc_ctrl = 0, agc_supp_cals = AR_PHY_AGC_CONTROL_OFFSET_CAL | AR_PHY_AGC_CONTROL_FLTR_CAL | AR_PHY_AGC_CONTROL_PKDET_CAL; @@ -1099,6 +1100,15 @@ skip_tx_iqcal: REG_WRITE(ah, AR_PHY_ACTIVE, AR_PHY_ACTIVE_EN); } + if (REG_READ(ah, AR_PHY_CL_CAL_CTL) & AR_PHY_CL_CAL_ENABLE) { + rx_delay = REG_READ(ah, AR_PHY_RX_DELAY); + /* Disable BB_active */ + REG_WRITE(ah, AR_PHY_ACTIVE, AR_PHY_ACTIVE_DIS); + udelay(5); + REG_WRITE(ah, AR_PHY_RX_DELAY, AR_PHY_RX_DELAY_DELAY); + REG_WRITE(ah, AR_PHY_ACTIVE, AR_PHY_ACTIVE_EN); + } + if (run_agc_cal || !(ah->ah_flags & AH_FASTCC)) { /* Calibrate the AGC */ REG_WRITE(ah, AR_PHY_AGC_CONTROL, @@ -1113,6 +1123,11 @@ skip_tx_iqcal: ar9003_hw_do_manual_peak_cal(ah, chan); } + if (REG_READ(ah, AR_PHY_CL_CAL_CTL) & AR_PHY_CL_CAL_ENABLE) { + REG_WRITE(ah, AR_PHY_RX_DELAY, rx_delay); + udelay(5); + } + if (ath9k_hw_mci_is_enabled(ah) && IS_CHAN_2GHZ(chan) && run_agc_cal) ar9003_mci_init_cal_done(ah); -- 1.8.4