ath9k: Fix regulatory compliance

To comply with ETSI regulations, make sure that
the CCA registers are programmed with the threshold
values from the EEPROM/Caldata. A new field is used
to indicate if the card has been calibrated with the
required threshold information.

Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/ath/ath9k/ar9003_eeprom.c b/drivers/net/wireless/ath/ath9k/ar9003_eeprom.c
index d9e09bf..c8d22ec 100644 (file)
--- a/drivers/net/wireless/ath/ath9k/ar9003_eeprom.c
+++ b/drivers/net/wireless/ath/ath9k/ar9003_eeprom.c
@@ -4121,6 +4121,37 @@ static void ar9003_hw_thermo_cal_apply(struct ath_hw *ah)
        }
 }
 
+static void ar9003_hw_apply_minccapwr_thresh(struct ath_hw *ah,
+                                            bool is2ghz)
+{
+       struct ar9300_eeprom *eep = &ah->eeprom.ar9300_eep;
+       const u_int32_t cca_ctrl[AR9300_MAX_CHAINS] = {
+               AR_PHY_CCA_CTRL_0,
+               AR_PHY_CCA_CTRL_1,
+               AR_PHY_CCA_CTRL_2,
+       };
+       int chain;
+       u32 val;
+
+       if (is2ghz) {
+               if (!(eep->base_ext1.misc_enable & BIT(2)))
+                       return;
+       } else {
+               if (!(eep->base_ext1.misc_enable & BIT(3)))
+                       return;
+       }
+
+       for (chain = 0; chain < AR9300_MAX_CHAINS; chain++) {
+               if (!(ah->caps.tx_chainmask & BIT(chain)))
+                       continue;
+
+               val = ar9003_modal_header(ah, is2ghz)->noiseFloorThreshCh[chain];
+               REG_RMW_FIELD(ah, cca_ctrl[chain],
+                             AR_PHY_EXT_CCA0_THRESH62_1, val);
+       }
+
+}
+
 static void ath9k_hw_ar9300_set_board_values(struct ath_hw *ah,
                                             struct ath9k_channel *chan)
 {
@@ -4135,6 +4166,7 @@ static void ath9k_hw_ar9300_set_board_values(struct ath_hw *ah,
        if (!AR_SREV_9330(ah) && !AR_SREV_9340(ah))
                ar9003_hw_internal_regulator_apply(ah);
        ar9003_hw_apply_tuning_caps(ah);
+       ar9003_hw_apply_minccapwr_thresh(ah, chan);
        ar9003_hw_txend_to_xpa_off_apply(ah, is2ghz);
        ar9003_hw_thermometer_apply(ah);
        ar9003_hw_thermo_cal_apply(ah);

diff --git a/drivers/net/wireless/ath/ath9k/ar9003_phy.h b/drivers/net/wireless/ath/ath9k/ar9003_phy.h
index bbbfc4d..1b44171 100644 (file)
--- a/drivers/net/wireless/ath/ath9k/ar9003_phy.h
+++ b/drivers/net/wireless/ath/ath9k/ar9003_phy.h
@@ -270,7 +270,7 @@
 #define AR_PHY_AGC              (AR_AGC_BASE + 0x14)
 #define AR_PHY_EXT_ATTEN_CTL_0  (AR_AGC_BASE + 0x18)
 #define AR_PHY_CCA_0            (AR_AGC_BASE + 0x1c)
-#define AR_PHY_EXT_CCA0         (AR_AGC_BASE + 0x20)
+#define AR_PHY_CCA_CTRL_0       (AR_AGC_BASE + 0x20)
 #define AR_PHY_RESTART          (AR_AGC_BASE + 0x24)
 
 /*
@@ -398,6 +398,8 @@
 #define AR9280_PHY_CCA_THRESH62_S   12
 #define AR_PHY_EXT_CCA0_THRESH62    0x000000FF
 #define AR_PHY_EXT_CCA0_THRESH62_S  0
+#define AR_PHY_EXT_CCA0_THRESH62_1    0x000001FF
+#define AR_PHY_EXT_CCA0_THRESH62_1_S  0
 #define AR_PHY_CCK_DETECT_WEAK_SIG_THR_CCK          0x0000003F
 #define AR_PHY_CCK_DETECT_WEAK_SIG_THR_CCK_S        0
 #define AR_PHY_CCK_DETECT_ANT_SWITCH_TIME           0x00001FC0