3 files changed, 60 insertions, 18 deletions

diff --git a/drivers/net/wireless/wl12xx/conf.h b/drivers/net/wireless/wl12xx/conf.h
index 3e581e19424..5d2a9e004c7 100644
--- a/drivers/net/wireless/wl12xx/conf.h
+++ b/drivers/net/wireless/wl12xx/conf.h
@@ -1096,16 +1096,31 @@ struct conf_scan_settings {
 };
 
 struct conf_sched_scan_settings {
-	/* minimum time to wait on the channel for active scans (in TUs) */
-	u16 min_dwell_time_active;
+	/*
+	 * The base time to wait on the channel for active scans (in TU/1000).
+	 * The minimum dwell time is calculated according to this:
+	 * min_dwell_time = base + num_of_probes_to_be_sent * delta_per_probe
+	 * The maximum dwell time is calculated according to this:
+	 * max_dwell_time = min_dwell_time + max_dwell_time_delta
+	 */
+	u32 base_dwell_time;
+
+	/* The delta between the min dwell time and max dwell time for
+	 * active scans (in TU/1000s). The max dwell time is used by the FW once
+	 * traffic is detected on the channel.
+	 */
+	u32 max_dwell_time_delta;
+
+	/* Delta added to min dwell time per each probe in 2.4 GHz (TU/1000) */
+	u32 dwell_time_delta_per_probe;
 
-	/* maximum time to wait on the channel for active scans (in TUs) */
-	u16 max_dwell_time_active;
+	/* Delta added to min dwell time per each probe in 5 GHz (TU/1000) */
+	u32 dwell_time_delta_per_probe_5;
 
-	/* time to wait on the channel for passive scans (in TUs) */
+	/* time to wait on the channel for passive scans (in TU/1000) */
 	u32 dwell_time_passive;
 
-	/* time to wait on the channel for DFS scans (in TUs) */
+	/* time to wait on the channel for DFS scans (in TU/1000) */
 	u32 dwell_time_dfs;
 
 	/* number of probe requests to send on each channel in active scans */
diff --git a/drivers/net/wireless/wl12xx/main.c b/drivers/net/wireless/wl12xx/main.c
index b560f2d2837..96ca25a92b7 100644
--- a/drivers/net/wireless/wl12xx/main.c
+++ b/drivers/net/wireless/wl12xx/main.c
@@ -276,14 +276,21 @@ static struct conf_drv_settings default_conf = {
 		.split_scan_timeout           = 50000,
 	},
 	.sched_scan = {
-		/* sched_scan requires dwell times in TU instead of TU/1000 */
-		.min_dwell_time_active = 30,
-		.max_dwell_time_active = 60,
-		.dwell_time_passive    = 100,
-		.dwell_time_dfs        = 150,
-		.num_probe_reqs        = 2,
-		.rssi_threshold        = -90,
-		.snr_threshold         = 0,
+		/*
+		 * Values are in TU/1000 but since sched scan FW command
+		 * params are in TUs rounding up may occur.
+		 */
+		.base_dwell_time              = 7500,
+		.max_dwell_time_delta         = 22500,
+		/* based on 250bits per probe @1Mbps */
+		.dwell_time_delta_per_probe   = 2000,
+		/* based on 250bits per probe @6Mbps (plus a bit more) */
+		.dwell_time_delta_per_probe_5 = 350,
+		.dwell_time_passive           = 100000,
+		.dwell_time_dfs               = 150000,
+		.num_probe_reqs               = 2,
+		.rssi_threshold               = -90,
+		.snr_threshold                = 0,
 	},
 	.rf = {
 		.tx_per_channel_power_compensation_2 = {
diff --git a/drivers/net/wireless/wl12xx/scan.c b/drivers/net/wireless/wl12xx/scan.c
index fcba055ef19..a57f333d07f 100644
--- a/drivers/net/wireless/wl12xx/scan.c
+++ b/drivers/net/wireless/wl12xx/scan.c
@@ -417,6 +417,23 @@ wl1271_scan_get_sched_scan_channels(struct wl1271 *wl,
 	int i, j;
 	u32 flags;
 	bool force_passive = !req->n_ssids;
+	u32 min_dwell_time_active, max_dwell_time_active, delta_per_probe;
+	u32 dwell_time_passive, dwell_time_dfs;
+
+	if (band == IEEE80211_BAND_5GHZ)
+		delta_per_probe = c->dwell_time_delta_per_probe_5;
+	else
+		delta_per_probe = c->dwell_time_delta_per_probe;
+
+	min_dwell_time_active = c->base_dwell_time +
+		 req->n_ssids * c->num_probe_reqs * delta_per_probe;
+
+	max_dwell_time_active = min_dwell_time_active + c->max_dwell_time_delta;
+
+	min_dwell_time_active = DIV_ROUND_UP(min_dwell_time_active, 1000);
+	max_dwell_time_active = DIV_ROUND_UP(max_dwell_time_active, 1000);
+	dwell_time_passive = DIV_ROUND_UP(c->dwell_time_passive, 1000);
+	dwell_time_dfs = DIV_ROUND_UP(c->dwell_time_dfs, 1000);
 
 	for (i = 0, j = start;
 	     i < req->n_channels && j < max_channels;
@@ -440,21 +457,24 @@ wl1271_scan_get_sched_scan_channels(struct wl1271 *wl,
 				     req->channels[i]->flags);
 			wl1271_debug(DEBUG_SCAN, "max_power %d",
 				     req->channels[i]->max_power);
+			wl1271_debug(DEBUG_SCAN, "min_dwell_time %d max dwell time %d",
+				     min_dwell_time_active,
+				     max_dwell_time_active);
 
 			if (flags & IEEE80211_CHAN_RADAR) {
 				channels[j].flags |= SCAN_CHANNEL_FLAGS_DFS;
 
 				channels[j].passive_duration =
-					cpu_to_le16(c->dwell_time_dfs);
+					cpu_to_le16(dwell_time_dfs);
 			} else {
 				channels[j].passive_duration =
-					cpu_to_le16(c->dwell_time_passive);
+					cpu_to_le16(dwell_time_passive);
 			}
 
 			channels[j].min_duration =
-				cpu_to_le16(c->min_dwell_time_active);
+				cpu_to_le16(min_dwell_time_active);
 			channels[j].max_duration =
-				cpu_to_le16(c->max_dwell_time_active);
+				cpu_to_le16(max_dwell_time_active);
 
 			channels[j].tx_power_att = req->channels[i]->max_power;
 			channels[j].channel = req->channels[i]->hw_value;