From: Sujith Manoharan <c_manoha@xxxxxxxxxxxxxxxx>
Set the appropriate bits in the HW after
AIC calibration is done.
Signed-off-by: Sujith Manoharan <c_manoha@xxxxxxxxxxxxxxxx>
---
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 c2cfac3..00aaf4d 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;
}
--
2.3.1
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