From 716eed4c0dfb6a7ceeb61730506e43f2755f322b Mon Sep 17 00:00:00 2001 From: Sujith Manoharan Date: Sat, 14 Mar 2015 11:27:51 +0530 Subject: [PATCH] ath9k: Finish AIC calibration Set the appropriate bits in the HW after AIC calibration is done. Signed-off-by: Sujith Manoharan Signed-off-by: Kalle Valo --- drivers/net/wireless/ath/ath9k/ar9003_aic.c | 78 ++++++++++++++++++++- 1 file changed, 77 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/ath/ath9k/ar9003_aic.c b/drivers/net/wireless/ath/ath9k/ar9003_aic.c index c2cfac3bb528..00aaf4dd90e7 100644 --- a/drivers/net/wireless/ath/ath9k/ar9003_aic.c +++ b/drivers/net/wireless/ath/ath9k/ar9003_aic.c @@ -186,15 +186,91 @@ static void ar9003_aic_cal_start(struct ath_hw *ah, u8 min_valid_count) aic->aic_cal_state = AIC_CAL_STATE_STARTED; } +static void ar9003_aic_cal_done(struct ath_hw *ah) +{ + /* Disable AIC reference signal in BT modem. */ + REG_WRITE(ah, ATH_AIC_BT_JUPITER_CTRL, + (REG_READ(ah, ATH_AIC_BT_JUPITER_CTRL) & + ~ATH_AIC_BT_AIC_ENABLE)); +} + +static u8 ar9003_aic_cal_continue(struct ath_hw *ah, bool cal_once) +{ + struct ath_common *common = ath9k_hw_common(ah); + struct ath9k_hw_mci *mci_hw = &ah->btcoex_hw.mci; + struct ath9k_hw_aic *aic = &ah->btcoex_hw.aic; + int i, num_chan; + + num_chan = MS(mci_hw->config, ATH_MCI_CONFIG_AIC_CAL_NUM_CHAN); + + if (!num_chan) { + aic->aic_cal_state = AIC_CAL_STATE_ERROR; + return aic->aic_cal_state; + } + + if (cal_once) { + for (i = 0; i < 10000; i++) { + if ((REG_READ(ah, AR_PHY_AIC_CTRL_0_B1) & + AR_PHY_AIC_CAL_ENABLE) == 0) + break; + + udelay(100); + } + } + + /* + * Use AR_PHY_AIC_CAL_ENABLE bit instead of AR_PHY_AIC_CAL_DONE. + * Sometimes CAL_DONE bit is not asserted. + */ + if ((REG_READ(ah, AR_PHY_AIC_CTRL_0_B1) & + AR_PHY_AIC_CAL_ENABLE) != 0) { + ath_dbg(common, MCI, "AIC cal is not done after 40ms"); + goto exit; + } + + REG_WRITE(ah, AR_PHY_AIC_SRAM_ADDR_B1, + (ATH_AIC_SRAM_CAL_OFFSET | ATH_AIC_SRAM_AUTO_INCREMENT)); + + for (i = 0; i < ATH_AIC_MAX_BT_CHANNEL; i++) { + u32 value; + + value = REG_READ(ah, AR_PHY_AIC_SRAM_DATA_B1); + + if (value & 0x01) { + if (aic->aic_sram[i] == 0) + aic->aic_caled_chan++; + + aic->aic_sram[i] = value; + + if (!cal_once) + break; + } + } + + if ((aic->aic_caled_chan >= num_chan) || cal_once) { + ar9003_aic_cal_done(ah); + } else { + /* Start calibration */ + REG_CLR_BIT(ah, AR_PHY_AIC_CTRL_0_B1, AR_PHY_AIC_CAL_ENABLE); + REG_SET_BIT(ah, AR_PHY_AIC_CTRL_0_B1, + AR_PHY_AIC_CAL_CH_VALID_RESET); + REG_SET_BIT(ah, AR_PHY_AIC_CTRL_0_B1, AR_PHY_AIC_CAL_ENABLE); + } +exit: + return aic->aic_cal_state; + +} + u8 ar9003_aic_calibration_single(struct ath_hw *ah) { struct ath9k_hw_mci *mci_hw = &ah->btcoex_hw.mci; - u8 cal_ret = 0; + u8 cal_ret; int num_chan; num_chan = MS(mci_hw->config, ATH_MCI_CONFIG_AIC_CAL_NUM_CHAN); ar9003_aic_cal_start(ah, num_chan); + cal_ret = ar9003_aic_cal_continue(ah, true); return cal_ret; } -- 2.39.5