staging: wilc1000: add passive scan support

Add passive scan support to the driver by passing the scan type to the
HW and configure the HW scan time if configured by the cfg80211.

Signed-off-by: Adham Abozaeid <adham.abozaeid@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

4 files changed, 25 insertions, 8 deletions

diff --git a/drivers/staging/wilc1000/host_interface.c b/drivers/staging/wilc1000/host_interface.c
index ed15bd1bcd56..13c9915358d0 100644
--- a/drivers/staging/wilc1000/host_interface.c
+++ b/drivers/staging/wilc1000/host_interface.c
@@ -6,7 +6,7 @@
 
 #include "wilc_wfi_netdevice.h"
 
-#define WILC_HIF_SCAN_TIMEOUT_MS                4000
+#define WILC_HIF_SCAN_TIMEOUT_MS                5000
 #define WILC_HIF_CONNECT_TIMEOUT_MS             9500
 
 #define WILC_FALSE_FRMWR_CHANNEL		100
@@ -237,7 +237,7 @@ int wilc_scan(struct wilc_vif *vif, u8 scan_source, u8 scan_type,
 	int result = 0;
 	struct wid wid_list[5];
 	u32 index = 0;
-	u32 i;
+	u32 i, scan_timeout;
 	u8 *buffer;
 	u8 valuesize = 0;
 	u8 *search_ssid_vals = NULL;
@@ -293,6 +293,18 @@ int wilc_scan(struct wilc_vif *vif, u8 scan_source, u8 scan_type,
 	wid_list[index].val = (s8 *)&scan_type;
 	index++;
 
+	if (scan_type == WILC_FW_PASSIVE_SCAN && request->duration) {
+		wid_list[index].id = WID_PASSIVE_SCAN_TIME;
+		wid_list[index].type = WID_SHORT;
+		wid_list[index].size = sizeof(u16);
+		wid_list[index].val = (s8 *)&request->duration;
+		index++;
+
+		scan_timeout = (request->duration * ch_list_len) + 500;
+	} else {
+		scan_timeout = WILC_HIF_SCAN_TIMEOUT_MS;
+	}
+
 	wid_list[index].id = WID_SCAN_CHANNEL_LIST;
 	wid_list[index].type = WID_BIN_DATA;
 
@@ -326,7 +338,7 @@ int wilc_scan(struct wilc_vif *vif, u8 scan_source, u8 scan_type,
 
 	hif_drv->scan_timer_vif = vif;
 	mod_timer(&hif_drv->scan_timer,
-		  jiffies + msecs_to_jiffies(WILC_HIF_SCAN_TIMEOUT_MS));
+		  jiffies + msecs_to_jiffies(scan_timeout));
 
 error:
 
diff --git a/drivers/staging/wilc1000/host_interface.h b/drivers/staging/wilc1000/host_interface.h
index a907c6d33012..4fcc7a3c151d 100644
--- a/drivers/staging/wilc1000/host_interface.h
+++ b/drivers/staging/wilc1000/host_interface.h
@@ -115,7 +115,6 @@ struct wilc_rcvd_net_info {
 	struct ieee80211_mgmt *mgmt;
 };
 
-
 struct wilc_user_scan_req {
 	void (*scan_result)(enum scan_event evt,
 			    struct wilc_rcvd_net_info *info, void *priv);
diff --git a/drivers/staging/wilc1000/wilc_wfi_cfgoperations.c b/drivers/staging/wilc1000/wilc_wfi_cfgoperations.c
index f6825727bf77..b0daa1136663 100644
--- a/drivers/staging/wilc1000/wilc_wfi_cfgoperations.c
+++ b/drivers/staging/wilc1000/wilc_wfi_cfgoperations.c
@@ -221,6 +221,7 @@ static int scan(struct wiphy *wiphy, struct cfg80211_scan_request *request)
 	u32 i;
 	int ret = 0;
 	u8 scan_ch_list[WILC_MAX_NUM_SCANNED_CH];
+	u8 scan_type;
 
 	if (request->n_channels > WILC_MAX_NUM_SCANNED_CH) {
 		netdev_err(priv->dev, "Requested scanned channels over\n");
@@ -235,9 +236,14 @@ static int scan(struct wiphy *wiphy, struct cfg80211_scan_request *request)
 		scan_ch_list[i] = ieee80211_frequency_to_channel(freq);
 	}
 
-	ret = wilc_scan(vif, WILC_FW_USER_SCAN, WILC_FW_ACTIVE_SCAN,
-			scan_ch_list, request->n_channels, cfg_scan_result,
-			(void *)priv, request);
+	if (request->n_ssids)
+		scan_type = WILC_FW_ACTIVE_SCAN;
+	else
+		scan_type = WILC_FW_PASSIVE_SCAN;
+
+	ret = wilc_scan(vif, WILC_FW_USER_SCAN, scan_type, scan_ch_list,
+			request->n_channels, cfg_scan_result, (void *)priv,
+			request);
 
 	if (ret) {
 		priv->scan_req = NULL;
diff --git a/drivers/staging/wilc1000/wilc_wlan_if.h b/drivers/staging/wilc1000/wilc_wlan_if.h
index b15de36e32e0..b89d0e0f04cc 100644
--- a/drivers/staging/wilc1000/wilc_wlan_if.h
+++ b/drivers/staging/wilc1000/wilc_wlan_if.h
@@ -684,7 +684,7 @@ enum {
 	WID_LONG_RETRY_LIMIT		= 0x1003,
 	WID_BEACON_INTERVAL		= 0x1006,
 	WID_MEMORY_ACCESS_16BIT		= 0x1008,
-
+	WID_PASSIVE_SCAN_TIME           = 0x100D,
 	WID_JOIN_START_TIMEOUT		= 0x100F,
 	WID_ASOC_TIMEOUT		= 0x1011,
 	WID_11I_PROTOCOL_TIMEOUT	= 0x1012,