ath9k_hw: Add capability flag for Antenna diversity and combining feature

This is enabled only for ar9285.

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

4 files changed, 16 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ath9k/eeprom.h b/drivers/net/wireless/ath/ath9k/eeprom.h
index 7f48df1e2903..090778da5d67 100644
--- a/drivers/net/wireless/ath/ath9k/eeprom.h
+++ b/drivers/net/wireless/ath/ath9k/eeprom.h
@@ -266,6 +266,8 @@ enum eeprom_param {
         EEP_INTERNAL_REGULATOR,
         EEP_SWREG,
         EEP_PAPRD,
+        EEP_MODAL_VER,
+        EEP_ANT_DIV_CTL1,
 };
 
 enum ar5416_rates {
diff --git a/drivers/net/wireless/ath/ath9k/eeprom_4k.c b/drivers/net/wireless/ath/ath9k/eeprom_4k.c
index 9cccd12e8f21..2e1397b68a87 100644
--- a/drivers/net/wireless/ath/ath9k/eeprom_4k.c
+++ b/drivers/net/wireless/ath/ath9k/eeprom_4k.c
@@ -213,6 +213,10 @@ static u32 ath9k_hw_4k_get_eeprom(struct ath_hw *ah,
                 return 0;
         case EEP_PWR_TABLE_OFFSET:
                 return AR5416_PWR_TABLE_OFFSET_DB;
+        case EEP_MODAL_VER:
+                return pModal->version;
+        case EEP_ANT_DIV_CTL1:
+                return pModal->antdiv_ctl1;
         default:
                 return 0;
         }
diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index 3384ca164562..68940a8864e0 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -2056,6 +2056,7 @@ int ath9k_hw_fill_cap_info(struct ath_hw *ah)
         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 
         u16 capField = 0, eeval;
+        u8 ant_div_ctl1;
 
         eeval = ah->eep_ops->get_eeprom(ah, EEP_REG_0);
         regulatory->current_rd = eeval;
@@ -2280,6 +2281,14 @@ int ath9k_hw_fill_cap_info(struct ath_hw *ah)
         if (AR_SREV_9287_10_OR_LATER(ah) || AR_SREV_9271(ah))
                 pCap->hw_caps |= ATH9K_HW_CAP_SGI_20;
 
+        if (AR_SREV_9285(ah))
+                if (ah->eep_ops->get_eeprom(ah, EEP_MODAL_VER) >= 3) {
+                        ant_div_ctl1 =
+                                ah->eep_ops->get_eeprom(ah, EEP_ANT_DIV_CTL1);
+                        if ((ant_div_ctl1 & 0x1) && ((ant_div_ctl1 >> 3) & 0x1))
+                                pCap->hw_caps |= ATH9K_HW_CAP_ANT_DIV_COMB;
+                }
+
         return 0;
 }
 
diff --git a/drivers/net/wireless/ath/ath9k/hw.h b/drivers/net/wireless/ath/ath9k/hw.h
index 1601dd439890..1a0efbd03e4f 100644
--- a/drivers/net/wireless/ath/ath9k/hw.h
+++ b/drivers/net/wireless/ath/ath9k/hw.h
@@ -204,6 +204,7 @@ enum ath9k_hw_caps {
         ATH9K_HW_CAP_FASTCLOCK                  = BIT(20),
         ATH9K_HW_CAP_SGI_20                     = BIT(21),
         ATH9K_HW_CAP_PAPRD                      = BIT(22),
+        ATH9K_HW_CAP_ANT_DIV_COMB               = BIT(23),
 };
 
 struct ath9k_hw_capabilities {