wl1251: Configure beacon filtering on if PSM used

Enable beacon filtering when PSM is enabled
Signed-off-by: Juuso Oikarinen <juuso.oikarinen@nokia.com>
Signed-off-by: Kalle Valo <kalle.valo@nokia.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/wl12xx/wl1251_acx.c

@@ -494,7 +494,7 @@ int wl1251_acx_rts_threshold(struct wl1251 *wl, u16 rts_threshold)
 	return ret;
 }
 
-int wl1251_acx_beacon_filter_opt(struct wl1251 *wl)
+int wl1251_acx_beacon_filter_opt(struct wl1251 *wl, bool enable_filter)
 {
 	struct acx_beacon_filter_option *beacon_filter;
 	int ret;
@@ -507,7 +507,7 @@ int wl1251_acx_beacon_filter_opt(struct wl1251 *wl)
 		goto out;
 	}
 
-	beacon_filter->enable = 0;
+	beacon_filter->enable = enable_filter;
 	beacon_filter->max_num_beacons = 0;
 
 	ret = wl1251_cmd_configure(wl, ACX_BEACON_FILTER_OPT,
@@ -525,6 +525,7 @@ int wl1251_acx_beacon_filter_opt(struct wl1251 *wl)
 int wl1251_acx_beacon_filter_table(struct wl1251 *wl)
 {
 	struct acx_beacon_filter_ie_table *ie_table;
+	int idx = 0;
 	int ret;
 
 	wl1251_debug(DEBUG_ACX, "acx beacon filter table");
@@ -535,8 +536,10 @@ int wl1251_acx_beacon_filter_table(struct wl1251 *wl)
 		goto out;
 	}
 
-	ie_table->num_ie = 0;
-	memset(ie_table->table, 0, BEACON_FILTER_TABLE_MAX_SIZE);
+	/* configure default beacon pass-through rules */
+	ie_table->num_ie = 1;
+	ie_table->table[idx++] = BEACON_FILTER_IE_ID_CHANNEL_SWITCH_ANN;
+	ie_table->table[idx++] = BEACON_RULE_PASS_ON_APPEARANCE;
 
 	ret = wl1251_cmd_configure(wl, ACX_BEACON_FILTER_TABLE,
 				   ie_table, sizeof(*ie_table));

drivers/net/wireless/wl12xx/wl1251_acx.h

@@ -450,6 +450,11 @@ struct acx_beacon_filter_option {
 			   (BEACON_FILTER_TABLE_MAX_VENDOR_SPECIFIC_IE_NUM * \
 			    BEACON_FILTER_TABLE_EXTRA_VENDOR_SPECIFIC_IE_SIZE))
 
+#define BEACON_RULE_PASS_ON_CHANGE                     BIT(0)
+#define BEACON_RULE_PASS_ON_APPEARANCE                 BIT(1)
+
+#define BEACON_FILTER_IE_ID_CHANNEL_SWITCH_ANN         (37)
+
 struct acx_beacon_filter_ie_table {
 	struct acx_header header;
 
@@ -1283,7 +1288,7 @@ int wl1251_acx_slot(struct wl1251 *wl, enum acx_slot_type slot_time);
 int wl1251_acx_group_address_tbl(struct wl1251 *wl);
 int wl1251_acx_service_period_timeout(struct wl1251 *wl);
 int wl1251_acx_rts_threshold(struct wl1251 *wl, u16 rts_threshold);
-int wl1251_acx_beacon_filter_opt(struct wl1251 *wl);
+int wl1251_acx_beacon_filter_opt(struct wl1251 *wl, bool enable_filter);
 int wl1251_acx_beacon_filter_table(struct wl1251 *wl);
 int wl1251_acx_conn_monit_params(struct wl1251 *wl);
 int wl1251_acx_sg_enable(struct wl1251 *wl);

drivers/net/wireless/wl12xx/wl1251_init.c

@@ -147,7 +147,8 @@ int wl1251_hw_init_beacon_filter(struct wl1251 *wl)
 {
 	int ret;
 
-	ret = wl1251_acx_beacon_filter_opt(wl);
+	/* disable beacon filtering at this stage */
+	ret = wl1251_acx_beacon_filter_opt(wl, false);
 	if (ret < 0)
 		return ret;
 

drivers/net/wireless/wl12xx/wl1251_main.c

@@ -1323,7 +1323,8 @@ int wl1251_init_ieee80211(struct wl1251 *wl)
 
 	wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
 		IEEE80211_HW_NOISE_DBM |
-		IEEE80211_HW_SUPPORTS_PS;
+		IEEE80211_HW_SUPPORTS_PS |
+		IEEE80211_HW_BEACON_FILTER;
 
 	wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
 	wl->hw->wiphy->max_scan_ssids = 1;

drivers/net/wireless/wl12xx/wl1251_ps.c

@@ -119,6 +119,11 @@ int wl1251_ps_set_mode(struct wl1251 *wl, enum wl1251_cmd_ps_mode mode)
 	case STATION_POWER_SAVE_MODE:
 		wl1251_debug(DEBUG_PSM, "entering psm");
 
+		/* enable beacon filtering */
+		ret = wl1251_acx_beacon_filter_opt(wl, true);
+		if (ret < 0)
+			return ret;
+
 		ret = wl1251_acx_wake_up_conditions(wl,
 						    WAKE_UP_EVENT_DTIM_BITMAP,
 						    wl->listen_int);
@@ -142,6 +147,11 @@ int wl1251_ps_set_mode(struct wl1251 *wl, enum wl1251_cmd_ps_mode mode)
 		if (ret < 0)
 			return ret;
 
+		/* disable beacon filtering */
+		ret = wl1251_acx_beacon_filter_opt(wl, false);
+		if (ret < 0)
+			return ret;
+
 		ret = wl1251_acx_wake_up_conditions(wl,
 						    WAKE_UP_EVENT_DTIM_BITMAP,
 						    wl->listen_int);