From 754dc53641e0038cd4fd3574b1f5b3c7239f73ce Mon Sep 17 00:00:00 2001
From: Vasanthakumar Thiagarajan <vasanth@atheros.com>
Date: Thu, 2 Sep 2010 01:34:41 -0700
Subject: [PATCH] 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>
---
 drivers/net/wireless/ath/ath9k/eeprom.h    | 2 ++
 drivers/net/wireless/ath/ath9k/eeprom_4k.c | 4 ++++
 drivers/net/wireless/ath/ath9k/hw.c        | 9 +++++++++
 drivers/net/wireless/ath/ath9k/hw.h        | 1 +
 4 files changed, 16 insertions(+)

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 {
-- 
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