ath9k_hw: run ath9k_hw_9271_pa_cal() initial calibration

The PA calibration for ar9271 ath9k_hw_9271_pa_cal() can run during
reset or initial calibration, update the PA calibration to account
for that and initialize PA calibration variables for both conditions.

Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 18 insertions, 7 deletions

diff --git a/drivers/net/wireless/ath/ath9k/calib.c b/drivers/net/wireless/ath/ath9k/calib.c
index 7aa3d1d8ec6f..551f8801459f 100644
--- a/drivers/net/wireless/ath/ath9k/calib.c
+++ b/drivers/net/wireless/ath/ath9k/calib.c
@@ -813,7 +813,7 @@ static void ath9k_olc_temp_compensation(struct ath_hw *ah)
         }
 }
 
-static void ath9k_hw_9271_pa_cal(struct ath_hw *ah)
+static void ath9k_hw_9271_pa_cal(struct ath_hw *ah, bool is_reset)
 {
         u32 regVal;
         unsigned int i;
@@ -889,10 +889,19 @@ static void ath9k_hw_9271_pa_cal(struct ath_hw *ah)
                 REG_WRITE(ah, 0x7834, regVal);
         }
 
-        /*  Empirical offset correction  */
-#if 0
-        REG_RMW_FIELD(ah, AR9285_AN_RF2G6, AR9271_AN_RF2G6_OFFS, 0x20);
-#endif
+        regVal = (regVal >>20) & 0x7f;
+
+        /* Update PA cal info */
+        if ((!is_reset) && (ah->pacal_info.prev_offset == regVal)) {
+                if (ah->pacal_info.max_skipcount < MAX_PACAL_SKIPCOUNT)
+                        ah->pacal_info.max_skipcount =
+                                2 * ah->pacal_info.max_skipcount;
+                ah->pacal_info.skipcount = ah->pacal_info.max_skipcount;
+        } else {
+                ah->pacal_info.max_skipcount = 1;
+                ah->pacal_info.skipcount = 0;
+                ah->pacal_info.prev_offset = regVal;
+        }
 
         regVal = REG_READ(ah, 0x7834);
         regVal |= 0x1;
@@ -1043,7 +1052,7 @@ bool ath9k_hw_calibrate(struct ath_hw *ah, struct ath9k_channel *chan,
         if (longcal) {
                 /* Do periodic PAOffset Cal */
                 if (AR_SREV_9271(ah))
-                        ath9k_hw_9271_pa_cal(ah);
+                        ath9k_hw_9271_pa_cal(ah, false);
                 else if (AR_SREV_9285_11_OR_LATER(ah)) {
                         if (!ah->pacal_info.skipcount)
                                 ath9k_hw_9285_pa_cal(ah, false);
@@ -1152,7 +1161,9 @@ bool ath9k_hw_init_cal(struct ath_hw *ah, struct ath9k_channel *chan)
         }
 
         /* Do PA Calibration */
-        if (AR_SREV_9285_11_OR_LATER(ah))
+        if (AR_SREV_9271(ah))
+                ath9k_hw_9271_pa_cal(ah, true);
+        else if (AR_SREV_9285_11_OR_LATER(ah))
                 ath9k_hw_9285_pa_cal(ah, true);
 
         /* Do NF Calibration after DC offset and other calibrations */