ath9k_hw: fix fast clock handling for 5GHz channels

Combine multiple checks that were supposed to check for the same
conditions, but didn't. Always enable fast PLL clock on AR9280 2.0

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

5 files changed, 18 insertions, 20 deletions

diff --git a/drivers/net/wireless/ath/ath9k/ar5008_phy.c b/drivers/net/wireless/ath/ath9k/ar5008_phy.c
index de8ce1291a46..b2c17c98bb38 100644
--- a/drivers/net/wireless/ath/ath9k/ar5008_phy.c
+++ b/drivers/net/wireless/ath/ath9k/ar5008_phy.c
@@ -850,7 +850,7 @@ static int ar5008_hw_process_ini(struct ath_hw *ah,
 
         REG_WRITE_ARRAY(&ah->iniBB_RfGain, freqIndex, regWrites);
 
-        if (AR_SREV_9280_20(ah) && IS_CHAN_A_5MHZ_SPACED(chan)) {
+        if (IS_CHAN_A_FAST_CLOCK(ah, chan)) {
                 REG_WRITE_ARRAY(&ah->iniModesAdditional, modesIndex,
                                 regWrites);
         }
@@ -892,8 +892,7 @@ static void ar5008_hw_set_rfmode(struct ath_hw *ah, struct ath9k_channel *chan)
                 rfMode |= (IS_CHAN_5GHZ(chan)) ?
                         AR_PHY_MODE_RF5GHZ : AR_PHY_MODE_RF2GHZ;
 
-        if ((AR_SREV_9280_20(ah) || AR_SREV_9300_20_OR_LATER(ah))
-            && IS_CHAN_A_5MHZ_SPACED(chan))
+        if (IS_CHAN_A_FAST_CLOCK(ah, chan))
                 rfMode |= (AR_PHY_MODE_DYNAMIC | AR_PHY_MODE_DYN_CCK_DISABLE);
 
         REG_WRITE(ah, AR_PHY_MODE, rfMode);
diff --git a/drivers/net/wireless/ath/ath9k/ar9002_phy.c b/drivers/net/wireless/ath/ath9k/ar9002_phy.c
index 18cfe1a9781c..ed314e89bfe1 100644
--- a/drivers/net/wireless/ath/ath9k/ar9002_phy.c
+++ b/drivers/net/wireless/ath/ath9k/ar9002_phy.c
@@ -455,16 +455,12 @@ static u32 ar9002_hw_compute_pll_control(struct ath_hw *ah,
                 pll |= SM(0x2, AR_RTC_9160_PLL_CLKSEL);
 
         if (chan && IS_CHAN_5GHZ(chan)) {
-                pll |= SM(0x28, AR_RTC_9160_PLL_DIV);
-
-
-                if (AR_SREV_9280_20(ah)) {
-                        if (((chan->channel % 20) == 0)
-                            || ((chan->channel % 10) == 0))
-                                pll = 0x2850;
-                        else
-                                pll = 0x142c;
-                }
+                if (IS_CHAN_A_FAST_CLOCK(ah, chan))
+                        pll = 0x142c;
+                else if (AR_SREV_9280_20(ah))
+                        pll = 0x2850;
+                else
+                        pll |= SM(0x28, AR_RTC_9160_PLL_DIV);
         } else {
                 pll |= SM(0x2c, AR_RTC_9160_PLL_DIV);
         }
diff --git a/drivers/net/wireless/ath/ath9k/ar9003_phy.c b/drivers/net/wireless/ath/ath9k/ar9003_phy.c
index bf8ec687f9e0..806f4a54b620 100644
--- a/drivers/net/wireless/ath/ath9k/ar9003_phy.c
+++ b/drivers/net/wireless/ath/ath9k/ar9003_phy.c
@@ -583,7 +583,7 @@ static int ar9003_hw_process_ini(struct ath_hw *ah,
          * For 5GHz channels requiring Fast Clock, apply
          * different modal values.
          */
-        if (IS_CHAN_A_5MHZ_SPACED(chan))
+        if (IS_CHAN_A_FAST_CLOCK(ah, chan))
                 REG_WRITE_ARRAY(&ah->iniModesAdditional,
                                 modesIndex, regWrites);
 
@@ -613,7 +613,7 @@ static void ar9003_hw_set_rfmode(struct ath_hw *ah,
         rfMode |= (IS_CHAN_B(chan) || IS_CHAN_G(chan))
                 ? AR_PHY_MODE_DYNAMIC : AR_PHY_MODE_OFDM;
 
-        if (IS_CHAN_A_5MHZ_SPACED(chan))
+        if (IS_CHAN_A_FAST_CLOCK(ah, chan))
                 rfMode |= (AR_PHY_MODE_DYNAMIC | AR_PHY_MODE_DYN_CCK_DISABLE);
 
         REG_WRITE(ah, AR_PHY_MODE, rfMode);
diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index 7bb700151ca6..8f37f1c2a380 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -1228,8 +1228,7 @@ int ath9k_hw_reset(struct ath_hw *ah, struct ath9k_channel *chan,
             (chan->channel != ah->curchan->channel) &&
             ((chan->channelFlags & CHANNEL_ALL) ==
              (ah->curchan->channelFlags & CHANNEL_ALL)) &&
-             !(AR_SREV_9280(ah) || IS_CHAN_A_5MHZ_SPACED(chan) ||
-             IS_CHAN_A_5MHZ_SPACED(ah->curchan))) {
+            !AR_SREV_9280(ah)) {
 
                 if (ath9k_hw_channel_change(ah, chan)) {
                         ath9k_hw_loadnf(ah, ah->curchan);
@@ -2202,6 +2201,11 @@ int ath9k_hw_fill_cap_info(struct ath_hw *ah)
                 pCap->txs_len = sizeof(struct ar9003_txs);
         } else {
                 pCap->tx_desc_len = sizeof(struct ath_desc);
+                if (AR_SREV_9280_20(ah) &&
+                    ((ah->eep_ops->get_eeprom(ah, EEP_MINOR_REV) <=
+                      AR5416_EEP_MINOR_VER_16) ||
+                     ah->eep_ops->get_eeprom(ah, EEP_FSTCLK_5G)))
+                        pCap->hw_caps |= ATH9K_HW_CAP_FASTCLOCK;
         }
 
         if (AR_SREV_9300_20_OR_LATER(ah))
diff --git a/drivers/net/wireless/ath/ath9k/hw.h b/drivers/net/wireless/ath/ath9k/hw.h
index 7a1347b2453f..bc682da28b2a 100644
--- a/drivers/net/wireless/ath/ath9k/hw.h
+++ b/drivers/net/wireless/ath/ath9k/hw.h
@@ -369,10 +369,9 @@ struct ath9k_channel {
 #define IS_CHAN_2GHZ(_c) (((_c)->channelFlags & CHANNEL_2GHZ) != 0)
 #define IS_CHAN_HALF_RATE(_c) (((_c)->channelFlags & CHANNEL_HALF) != 0)
 #define IS_CHAN_QUARTER_RATE(_c) (((_c)->channelFlags & CHANNEL_QUARTER) != 0)
-#define IS_CHAN_A_5MHZ_SPACED(_c)                       \
+#define IS_CHAN_A_FAST_CLOCK(_ah, _c)                   \
         ((((_c)->channelFlags & CHANNEL_5GHZ) != 0) &&  \
-         (((_c)->channel % 20) != 0) &&                 \
-         (((_c)->channel % 10) != 0))
+         ((_ah)->caps.hw_caps & ATH9K_HW_CAP_FASTCLOCK))
 
 /* These macros check chanmode and not channelFlags */
 #define IS_CHAN_B(_c) ((_c)->chanmode == CHANNEL_B)