ath9k_hw: Add a helper to get paprd scale factor

Signed-off-by: Vasanthakumar Thiagarajan <vasanth@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

2 files changed, 24 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ath9k/ar9003_eeprom.c b/drivers/net/wireless/ath/ath9k/ar9003_eeprom.c
index 4149ffb6d54a..9fa5793abd27 100644
--- a/drivers/net/wireless/ath/ath9k/ar9003_eeprom.c
+++ b/drivers/net/wireless/ath/ath9k/ar9003_eeprom.c
@@ -4843,6 +4843,27 @@ u8 *ar9003_get_spur_chan_ptr(struct ath_hw *ah, bool is_2ghz)
                 return eep->modalHeader5G.spurChans;
 }
 
+unsigned int ar9003_get_paprd_scale_factor(struct ath_hw *ah,
+                                           struct ath9k_channel *chan)
+{
+        struct ar9300_eeprom *eep = &ah->eeprom.ar9300_eep;
+
+        if (IS_CHAN_2GHZ(chan))
+                return MS(le32_to_cpu(eep->modalHeader2G.papdRateMaskHt20),
+                          AR9300_PAPRD_SCALE_1);
+        else {
+                if (chan->channel >= 5700)
+                return MS(le32_to_cpu(eep->modalHeader5G.papdRateMaskHt20),
+                          AR9300_PAPRD_SCALE_1);
+                else if (chan->channel >= 5400)
+                        return MS(le32_to_cpu(eep->modalHeader5G.papdRateMaskHt40),
+                                   AR9300_PAPRD_SCALE_2);
+                else
+                        return MS(le32_to_cpu(eep->modalHeader5G.papdRateMaskHt40),
+                                  AR9300_PAPRD_SCALE_1);
+        }
+}
+
 const struct eeprom_ops eep_ar9300_ops = {
         .check_eeprom = ath9k_hw_ar9300_check_eeprom,
         .get_eeprom = ath9k_hw_ar9300_get_eeprom,
diff --git a/drivers/net/wireless/ath/ath9k/ar9003_eeprom.h b/drivers/net/wireless/ath/ath9k/ar9003_eeprom.h
index efb6a02be377..afb0b5ee1865 100644
--- a/drivers/net/wireless/ath/ath9k/ar9003_eeprom.h
+++ b/drivers/net/wireless/ath/ath9k/ar9003_eeprom.h
@@ -315,4 +315,7 @@ s32 ar9003_hw_get_tx_gain_idx(struct ath_hw *ah);
 s32 ar9003_hw_get_rx_gain_idx(struct ath_hw *ah);
 
 u8 *ar9003_get_spur_chan_ptr(struct ath_hw *ah, bool is_2ghz);
+
+unsigned int ar9003_get_paprd_scale_factor(struct ath_hw *ah,
+                                           struct ath9k_channel *chan);
 #endif