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ath9k: Finish AIC calibration 

Set the appropriate bits in the HW after
AIC calibration is done.

Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Sujith Manoharan 2015-03-14 11:27:51 +05:30 committed by Kalle Valo
parent b6ab9ae2ee
commit 716eed4c0d
1 changed files with 77 additions and 1 deletions
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78
drivers/net/wireless/ath/ath9k/ar9003_aic.c
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@ -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;
}