ath9k_hw: Optimize ath9k_hw_ar9287_set_board_values

Rather than doing a series of RMWs, calculate the
value to be written to the register in question and
do a single REGWRITE. This improves bringup time.

This depends on the analog_shiftreg configuration option,
which is currently buggy. For AP mode, a delay of 100us
has to be the default. For station mode, this knob has to
be enabled on a per-case basis, though it is a little
unclear on when to enable a delay. This can be fixed later though.

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

3 files changed, 41 insertions, 37 deletions

diff --git a/drivers/net/wireless/ath/ath9k/eeprom.c b/drivers/net/wireless/ath/ath9k/eeprom.c
index ca8704a9d7ac..a29b2d94c802 100644
--- a/drivers/net/wireless/ath/ath9k/eeprom.c
+++ b/drivers/net/wireless/ath/ath9k/eeprom.c
@@ -24,6 +24,14 @@ static inline u16 ath9k_hw_fbin2freq(u8 fbin, bool is2GHz)
         return (u16) ((is2GHz) ? (2300 + fbin) : (4800 + 5 * fbin));
 }
 
+void ath9k_hw_analog_shift_regwrite(struct ath_hw *ah, u32 reg, u32 val)
+{
+        REG_WRITE(ah, reg, val);
+
+        if (ah->config.analog_shiftreg)
+                udelay(100);
+}
+
 void ath9k_hw_analog_shift_rmw(struct ath_hw *ah, u32 reg, u32 mask,
                                u32 shift, u32 val)
 {
diff --git a/drivers/net/wireless/ath/ath9k/eeprom.h b/drivers/net/wireless/ath/ath9k/eeprom.h
index 21354c15a9a9..14186f2fc113 100644
--- a/drivers/net/wireless/ath/ath9k/eeprom.h
+++ b/drivers/net/wireless/ath/ath9k/eeprom.h
@@ -679,6 +679,7 @@ struct eeprom_ops {
         u16 (*get_spur_channel)(struct ath_hw *ah, u16 i, bool is2GHz);
 };
 
+void ath9k_hw_analog_shift_regwrite(struct ath_hw *ah, u32 reg, u32 val);
 void ath9k_hw_analog_shift_rmw(struct ath_hw *ah, u32 reg, u32 mask,
                                u32 shift, u32 val);
 int16_t ath9k_hw_interpolate(u16 target, u16 srcLeft, u16 srcRight,
diff --git a/drivers/net/wireless/ath/ath9k/eeprom_9287.c b/drivers/net/wireless/ath/ath9k/eeprom_9287.c
index 5010cd13023c..27abfba0b69f 100644
--- a/drivers/net/wireless/ath/ath9k/eeprom_9287.c
+++ b/drivers/net/wireless/ath/ath9k/eeprom_9287.c
@@ -988,7 +988,7 @@ static void ath9k_hw_ar9287_set_board_values(struct ath_hw *ah,
         struct ar9287_eeprom *eep = &ah->eeprom.map9287;
         struct modal_eep_ar9287_header *pModal = &eep->modalHeader;
         u16 antWrites[AR9287_ANT_16S];
-        u32 regChainOffset;
+        u32 regChainOffset, regval;
         u8 txRxAttenLocal;
         int i, j, offset_num;
 
@@ -1075,42 +1075,37 @@ static void ath9k_hw_ar9287_set_board_values(struct ath_hw *ah,
         REG_RMW_FIELD(ah, AR_PHY_EXT_CCA0,
                       AR_PHY_EXT_CCA0_THRESH62, pModal->thresh62);
 
-        ath9k_hw_analog_shift_rmw(ah, AR9287_AN_RF2G3_CH0, AR9287_AN_RF2G3_DB1,
-                                  AR9287_AN_RF2G3_DB1_S, pModal->db1);
-        ath9k_hw_analog_shift_rmw(ah, AR9287_AN_RF2G3_CH0, AR9287_AN_RF2G3_DB2,
-                                  AR9287_AN_RF2G3_DB2_S, pModal->db2);
-        ath9k_hw_analog_shift_rmw(ah, AR9287_AN_RF2G3_CH0,
-                                  AR9287_AN_RF2G3_OB_CCK,
-                                  AR9287_AN_RF2G3_OB_CCK_S, pModal->ob_cck);
-        ath9k_hw_analog_shift_rmw(ah, AR9287_AN_RF2G3_CH0,
-                                  AR9287_AN_RF2G3_OB_PSK,
-                                  AR9287_AN_RF2G3_OB_PSK_S, pModal->ob_psk);
-        ath9k_hw_analog_shift_rmw(ah, AR9287_AN_RF2G3_CH0,
-                                  AR9287_AN_RF2G3_OB_QAM,
-                                  AR9287_AN_RF2G3_OB_QAM_S, pModal->ob_qam);
-        ath9k_hw_analog_shift_rmw(ah, AR9287_AN_RF2G3_CH0,
-                                  AR9287_AN_RF2G3_OB_PAL_OFF,
-                                  AR9287_AN_RF2G3_OB_PAL_OFF_S,
-                                  pModal->ob_pal_off);
-
-        ath9k_hw_analog_shift_rmw(ah, AR9287_AN_RF2G3_CH1,
-                                  AR9287_AN_RF2G3_DB1, AR9287_AN_RF2G3_DB1_S,
-                                  pModal->db1);
-        ath9k_hw_analog_shift_rmw(ah, AR9287_AN_RF2G3_CH1, AR9287_AN_RF2G3_DB2,
-                                  AR9287_AN_RF2G3_DB2_S, pModal->db2);
-        ath9k_hw_analog_shift_rmw(ah, AR9287_AN_RF2G3_CH1,
-                                  AR9287_AN_RF2G3_OB_CCK,
-                                  AR9287_AN_RF2G3_OB_CCK_S, pModal->ob_cck);
-        ath9k_hw_analog_shift_rmw(ah, AR9287_AN_RF2G3_CH1,
-                                  AR9287_AN_RF2G3_OB_PSK,
-                                  AR9287_AN_RF2G3_OB_PSK_S, pModal->ob_psk);
-        ath9k_hw_analog_shift_rmw(ah, AR9287_AN_RF2G3_CH1,
-                                  AR9287_AN_RF2G3_OB_QAM,
-                                  AR9287_AN_RF2G3_OB_QAM_S, pModal->ob_qam);
-        ath9k_hw_analog_shift_rmw(ah, AR9287_AN_RF2G3_CH1,
-                                  AR9287_AN_RF2G3_OB_PAL_OFF,
-                                  AR9287_AN_RF2G3_OB_PAL_OFF_S,
-                                  pModal->ob_pal_off);
+        regval = REG_READ(ah, AR9287_AN_RF2G3_CH0);
+        regval &= ~(AR9287_AN_RF2G3_DB1 |
+                    AR9287_AN_RF2G3_DB2 |
+                    AR9287_AN_RF2G3_OB_CCK |
+                    AR9287_AN_RF2G3_OB_PSK |
+                    AR9287_AN_RF2G3_OB_QAM |
+                    AR9287_AN_RF2G3_OB_PAL_OFF);
+        regval |= (SM(pModal->db1, AR9287_AN_RF2G3_DB1) |
+                   SM(pModal->db2, AR9287_AN_RF2G3_DB2) |
+                   SM(pModal->ob_cck, AR9287_AN_RF2G3_OB_CCK) |
+                   SM(pModal->ob_psk, AR9287_AN_RF2G3_OB_PSK) |
+                   SM(pModal->ob_qam, AR9287_AN_RF2G3_OB_QAM) |
+                   SM(pModal->ob_pal_off, AR9287_AN_RF2G3_OB_PAL_OFF));
+
+        ath9k_hw_analog_shift_regwrite(ah, AR9287_AN_RF2G3_CH0, regval);
+
+        regval = REG_READ(ah, AR9287_AN_RF2G3_CH1);
+        regval &= ~(AR9287_AN_RF2G3_DB1 |
+                    AR9287_AN_RF2G3_DB2 |
+                    AR9287_AN_RF2G3_OB_CCK |
+                    AR9287_AN_RF2G3_OB_PSK |
+                    AR9287_AN_RF2G3_OB_QAM |
+                    AR9287_AN_RF2G3_OB_PAL_OFF);
+        regval |= (SM(pModal->db1, AR9287_AN_RF2G3_DB1) |
+                   SM(pModal->db2, AR9287_AN_RF2G3_DB2) |
+                   SM(pModal->ob_cck, AR9287_AN_RF2G3_OB_CCK) |
+                   SM(pModal->ob_psk, AR9287_AN_RF2G3_OB_PSK) |
+                   SM(pModal->ob_qam, AR9287_AN_RF2G3_OB_QAM) |
+                   SM(pModal->ob_pal_off, AR9287_AN_RF2G3_OB_PAL_OFF));
+
+        ath9k_hw_analog_shift_regwrite(ah, AR9287_AN_RF2G3_CH1, regval);
 
         REG_RMW_FIELD(ah, AR_PHY_RF_CTL2,
                       AR_PHY_TX_END_DATA_START, pModal->txFrameToDataStart);