commit 47c80de62e9d6d262a829502d689a8b56add8d3d
author Vasanthakumar Thiagarajan <vasanth@atheros.com> Mon Dec 06 04:27:43 2010 -0800
committer John W. Linville <linville@tuxdriver.com> Tue Dec 07 16:34:54 2010 -0500
tree c30b7df85d2e36fb54ee6a98a12d144cfea8dc6f
parent 8060e169e02fe855f5533b5ef6af1f23ae2db0c4

ath9k_hw: Find the maximum number of chains that hw supports

Have it in ah->caps. This will be used during various
calibrations.

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

drivers/net/wireless/ath/ath9k/hw.c

diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index 49da184..a2f85b7 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -1764,7 +1764,7 @@
 	struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 
 	u16 capField = 0, eeval;
-	u8 ant_div_ctl1;
+	u8 ant_div_ctl1, tx_chainmask, rx_chainmask;
 
 	eeval = ah->eep_ops->get_eeprom(ah, EEP_REG_0);
 	regulatory->current_rd = eeval;
@@ -1976,6 +1976,18 @@
 		pCap->pcie_lcr_offset = 0x80;
 	}
 
+	tx_chainmask = pCap->tx_chainmask;
+	rx_chainmask = pCap->rx_chainmask;
+	while (tx_chainmask || rx_chainmask) {
+		if (tx_chainmask & BIT(0))
+			pCap->max_txchains++;
+		if (rx_chainmask & BIT(0))
+			pCap->max_rxchains++;
+
+		tx_chainmask >>= 1;
+		rx_chainmask >>= 1;
+	}
+
 	return 0;
 }