rt2x00: Add missing TSF sync mode for AP operation

Currently rt2x00 uses the TSF_SYNC_BEACON mode for all beaconing
interface types. However, TSF_SYNC_BEACON is meant for IBSS networks and
thus implements TSF merging in the hardware. Rename TSF_SYNC_BEACON to
TSF_SYNC_ADHOC to better express its purpose and introduce the missing
TSF sync mode TSF_SYNC_AP_NONE which should be used for beaconing modes
that don't need TSF merging.

Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/rt2x00/rt2800lib.c

@@ -805,15 +805,16 @@ void rt2800_config_intf(struct rt2x00_dev *rt2x00dev, struct rt2x00_intf *intf,
 		rt2x00_set_field32(&reg, BCN_TIME_CFG_TSF_TICKING, 1);
 		rt2x00_set_field32(&reg, BCN_TIME_CFG_TSF_SYNC, conf->sync);
 		rt2x00_set_field32(&reg, BCN_TIME_CFG_TBTT_ENABLE,
-				   (conf->sync == TSF_SYNC_BEACON));
+				   (conf->sync == TSF_SYNC_ADHOC ||
+				    conf->sync == TSF_SYNC_AP_NONE));
 		rt2800_register_write(rt2x00dev, BCN_TIME_CFG, reg);
 
 		/*
 		 * Enable pre tbtt interrupt for beaconing modes
 		 */
 		rt2800_register_read(rt2x00dev, INT_TIMER_EN, &reg);
 		rt2x00_set_field32(&reg, INT_TIMER_EN_PRE_TBTT_TIMER,
-				   (conf->sync == TSF_SYNC_BEACON));
+				   (conf->sync == TSF_SYNC_AP_NONE));
 		rt2800_register_write(rt2x00dev, INT_TIMER_EN, reg);
 
 	}

drivers/net/wireless/rt2x00/rt2x00config.c

@@ -41,10 +41,12 @@ void rt2x00lib_config_intf(struct rt2x00_dev *rt2x00dev,
 
 	switch (type) {
 	case NL80211_IFTYPE_ADHOC:
+		conf.sync = TSF_SYNC_ADHOC;
+		break;
 	case NL80211_IFTYPE_AP:
 	case NL80211_IFTYPE_MESH_POINT:
 	case NL80211_IFTYPE_WDS:
-		conf.sync = TSF_SYNC_BEACON;
+		conf.sync = TSF_SYNC_AP_NONE;
 		break;
 	case NL80211_IFTYPE_STATION:
 		conf.sync = TSF_SYNC_INFRA;

drivers/net/wireless/rt2x00/rt2x00reg.h

@@ -63,7 +63,8 @@ enum led_mode {
 enum tsf_sync {
 	TSF_SYNC_NONE = 0,
 	TSF_SYNC_INFRA = 1,
-	TSF_SYNC_BEACON = 2,
+	TSF_SYNC_ADHOC = 2,
+	TSF_SYNC_AP_NONE = 3,
 };
 
 /*