ath9k: Add a HW capability for WLAN/BT RX diversity
Make use of this capability to restrict the usage of the
debugfs file and modparam using which this feature can
be enabled.
Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/ath9k/init.c b/drivers/net/wireless/ath/ath9k/init.c
index 5e81b2c..b678add 100644
--- a/drivers/net/wireless/ath/ath9k/init.c
+++ b/drivers/net/wireless/ath/ath9k/init.c
@@ -516,6 +516,7 @@
static void ath9k_init_platform(struct ath_softc *sc)
{
struct ath_hw *ah = sc->sc_ah;
+ struct ath9k_hw_capabilities *pCap = &ah->caps;
struct ath_common *common = ath9k_hw_common(ah);
if (common->bus_ops->ath_bus_type != ATH_PCI)
@@ -531,8 +532,14 @@
ath_info(common, "Set parameters for %s\n",
(sc->driver_data & ATH9K_PCI_CUS198) ?
"CUS198" : "CUS230");
- } else if (sc->driver_data & ATH9K_PCI_CUS217) {
+ }
+
+ if (sc->driver_data & ATH9K_PCI_CUS217)
ath_info(common, "CUS217 card detected\n");
+
+ if (sc->driver_data & ATH9K_PCI_BT_ANT_DIV) {
+ pCap->hw_caps |= ATH9K_HW_CAP_BT_ANT_DIV;
+ ath_info(common, "Set BT/WLAN RX diversity capability\n");
}
}
@@ -586,6 +593,7 @@
{
struct ath9k_platform_data *pdata = sc->dev->platform_data;
struct ath_hw *ah = NULL;
+ struct ath9k_hw_capabilities *pCap;
struct ath_common *common;
int ret = 0, i;
int csz = 0;
@@ -602,6 +610,7 @@
ah->reg_ops.rmw = ath9k_reg_rmw;
atomic_set(&ah->intr_ref_cnt, -1);
sc->sc_ah = ah;
+ pCap = &ah->caps;
sc->dfs_detector = dfs_pattern_detector_init(ah, NL80211_DFS_UNSET);
@@ -633,10 +642,14 @@
ath9k_init_platform(sc);
/*
- * Enable WLAN/BT RX Antenna diversity only when BTCOEX is enabled
- * and the user manually requests the feature.
+ * Enable WLAN/BT RX Antenna diversity only when:
+ *
+ * - BTCOEX is enabled
+ * - the user manually requests the feature.
+ * - the HW cap is set using the platform data.
*/
- if (common->btcoex_enabled && ath9k_bt_ant_diversity)
+ if (common->btcoex_enabled && ath9k_bt_ant_diversity &&
+ (pCap->hw_caps & ATH9K_HW_CAP_BT_ANT_DIV))
common->bt_ant_diversity = 1;
spin_lock_init(&common->cc_lock);