Merge branch 'for-linville' of git://git.kernel.org/pub/scm/linux/kernel/git/luca/wl12xx

10 files changed, 728 insertions, 16 deletions

diff --git a/drivers/net/wireless/wl12xx/boot.c b/drivers/net/wireless/wl12xx/boot.c
index 2b0cf85..b07f8b7 100644
--- a/drivers/net/wireless/wl12xx/boot.c
+++ b/drivers/net/wireless/wl12xx/boot.c
@@ -478,7 +478,9 @@ static int wl1271_boot_run_firmware(struct wl1271 *wl)
 		DISCONNECT_EVENT_COMPLETE_ID |
 		RSSI_SNR_TRIGGER_0_EVENT_ID |
 		PSPOLL_DELIVERY_FAILURE_EVENT_ID |
-		SOFT_GEMINI_SENSE_EVENT_ID;
+		SOFT_GEMINI_SENSE_EVENT_ID |
+		PERIODIC_SCAN_REPORT_EVENT_ID |
+		PERIODIC_SCAN_COMPLETE_EVENT_ID;
 
 	if (wl->bss_type == BSS_TYPE_AP_BSS)
 		wl->event_mask |= STA_REMOVE_COMPLETE_EVENT_ID;
diff --git a/drivers/net/wireless/wl12xx/conf.h b/drivers/net/wireless/wl12xx/conf.h
index 1f94736..ba558fc 100644
--- a/drivers/net/wireless/wl12xx/conf.h
+++ b/drivers/net/wireless/wl12xx/conf.h
@@ -1147,6 +1147,26 @@ 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;
+
+	/* maximum time to wait on the channel for active scans (in TUs) */
+	u16 max_dwell_time_active;
+
+	/* time to wait on the channel for passive scans (in TUs) */
+	u32 dwell_time_passive;
+
+	/* number of probe requests to send on each channel in active scans */
+	u8 num_probe_reqs;
+
+	/* RSSI threshold to be used for filtering */
+	s8 rssi_threshold;
+
+	/* SNR threshold to be used for filtering */
+	s8 snr_threshold;
+};
+
 /* these are number of channels on the band divided by two, rounded up */
 #define CONF_TX_PWR_COMPENSATION_LEN_2 7
 #define CONF_TX_PWR_COMPENSATION_LEN_5 18
@@ -1234,6 +1254,7 @@ struct conf_drv_settings {
 	struct conf_pm_config_settings pm_config;
 	struct conf_roam_trigger_settings roam_trigger;
 	struct conf_scan_settings scan;
+	struct conf_sched_scan_settings sched_scan;
 	struct conf_rf_settings rf;
 	struct conf_ht_setting ht;
 	struct conf_memory_settings mem_wl127x;
diff --git a/drivers/net/wireless/wl12xx/debugfs.c b/drivers/net/wireless/wl12xx/debugfs.c
index b2f692b..f1f8df9 100644
--- a/drivers/net/wireless/wl12xx/debugfs.c
+++ b/drivers/net/wireless/wl12xx/debugfs.c
@@ -377,6 +377,7 @@ static ssize_t driver_state_read(struct file *file, char __user *user_buf,
 	DRIVER_STATE_PRINT_HEX(platform_quirks);
 	DRIVER_STATE_PRINT_HEX(chip.id);
 	DRIVER_STATE_PRINT_STR(chip.fw_ver_str);
+	DRIVER_STATE_PRINT_INT(sched_scanning);
 
 #undef DRIVER_STATE_PRINT_INT
 #undef DRIVER_STATE_PRINT_LONG
diff --git a/drivers/net/wireless/wl12xx/event.c b/drivers/net/wireless/wl12xx/event.c
index ae69330..c3c554c 100644
--- a/drivers/net/wireless/wl12xx/event.c
+++ b/drivers/net/wireless/wl12xx/event.c
@@ -135,6 +135,13 @@ static int wl1271_event_ps_report(struct wl1271 *wl,
 
 		/* enable beacon early termination */
 		ret = wl1271_acx_bet_enable(wl, true);
+		if (ret < 0)
+			break;
+
+		if (wl->ps_compl) {
+			complete(wl->ps_compl);
+			wl->ps_compl = NULL;
+		}
 		break;
 	default:
 		break;
@@ -188,6 +195,22 @@ static int wl1271_event_process(struct wl1271 *wl, struct event_mailbox *mbox)
 		wl1271_scan_stm(wl);
 	}
 
+	if (vector & PERIODIC_SCAN_REPORT_EVENT_ID) {
+		wl1271_debug(DEBUG_EVENT, "PERIODIC_SCAN_REPORT_EVENT "
+			     "(status 0x%0x)", mbox->scheduled_scan_status);
+
+		wl1271_scan_sched_scan_results(wl);
+	}
+
+	if (vector & PERIODIC_SCAN_COMPLETE_EVENT_ID) {
+		wl1271_debug(DEBUG_EVENT, "PERIODIC_SCAN_COMPLETE_EVENT "
+			     "(status 0x%0x)", mbox->scheduled_scan_status);
+		if (wl->sched_scanning) {
+			wl1271_scan_sched_scan_stop(wl);
+			ieee80211_sched_scan_stopped(wl->hw);
+		}
+	}
+
 	/* disable dynamic PS when requested by the firmware */
 	if (vector & SOFT_GEMINI_SENSE_EVENT_ID &&
 	    wl->bss_type == BSS_TYPE_STA_BSS) {
diff --git a/drivers/net/wireless/wl12xx/main.c b/drivers/net/wireless/wl12xx/main.c
index 6dab6f0..610be03 100644
--- a/drivers/net/wireless/wl12xx/main.c
+++ b/drivers/net/wireless/wl12xx/main.c
@@ -257,12 +257,16 @@ static struct conf_drv_settings default_conf = {
 		.wake_up_event               = CONF_WAKE_UP_EVENT_DTIM,
 		.listen_interval             = 1,
 		.bcn_filt_mode               = CONF_BCN_FILT_MODE_ENABLED,
-		.bcn_filt_ie_count           = 1,
+		.bcn_filt_ie_count           = 2,
 		.bcn_filt_ie = {
 			[0] = {
 				.ie          = WLAN_EID_CHANNEL_SWITCH,
 				.rule        = CONF_BCN_RULE_PASS_ON_APPEARANCE,
-			}
+			},
+			[1] = {
+				.ie          = WLAN_EID_HT_INFORMATION,
+				.rule        = CONF_BCN_RULE_PASS_ON_CHANGE,
+			},
 		},
 		.synch_fail_thold            = 10,
 		.bss_lose_timeout            = 100,
@@ -302,6 +306,15 @@ static struct conf_drv_settings default_conf = {
 		.max_dwell_time_passive       = 100000,
 		.num_probe_reqs               = 2,
 	},
+	.sched_scan = {
+		/* sched_scan requires dwell times in TU instead of TU/1000 */
+		.min_dwell_time_active = 8,
+		.max_dwell_time_active = 30,
+		.dwell_time_passive    = 100,
+		.num_probe_reqs        = 2,
+		.rssi_threshold        = -90,
+		.snr_threshold         = 0,
+	},
 	.rf = {
 		.tx_per_channel_power_compensation_2 = {
 			0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
@@ -975,6 +988,11 @@ static void wl1271_recovery_work(struct work_struct *work)
 	/* Prevent spurious TX during FW restart */
 	ieee80211_stop_queues(wl->hw);
 
+	if (wl->sched_scanning) {
+		ieee80211_sched_scan_stopped(wl->hw);
+		wl->sched_scanning = false;
+	}
+
 	/* reboot the chipset */
 	__wl1271_op_remove_interface(wl, false);
 	ieee80211_restart_hw(wl->hw);
@@ -1332,6 +1350,150 @@ static struct notifier_block wl1271_dev_notifier = {
 	.notifier_call = wl1271_dev_notify,
 };
 
+static int wl1271_configure_suspend(struct wl1271 *wl)
+{
+	int ret;
+
+	if (wl->bss_type != BSS_TYPE_STA_BSS)
+		return 0;
+
+	mutex_lock(&wl->mutex);
+
+	ret = wl1271_ps_elp_wakeup(wl);
+	if (ret < 0)
+		goto out_unlock;
+
+	/* enter psm if needed*/
+	if (!test_bit(WL1271_FLAG_PSM, &wl->flags)) {
+		DECLARE_COMPLETION_ONSTACK(compl);
+
+		wl->ps_compl = &compl;
+		ret = wl1271_ps_set_mode(wl, STATION_POWER_SAVE_MODE,
+				   wl->basic_rate, true);
+		if (ret < 0)
+			goto out_sleep;
+
+		/* we must unlock here so we will be able to get events */
+		wl1271_ps_elp_sleep(wl);
+		mutex_unlock(&wl->mutex);
+
+		ret = wait_for_completion_timeout(
+			&compl, msecs_to_jiffies(WL1271_PS_COMPLETE_TIMEOUT));
+		if (ret <= 0) {
+			wl1271_warning("couldn't enter ps mode!");
+			ret = -EBUSY;
+			goto out;
+		}
+
+		/* take mutex again, and wakeup */
+		mutex_lock(&wl->mutex);
+
+		ret = wl1271_ps_elp_wakeup(wl);
+		if (ret < 0)
+			goto out_unlock;
+	}
+out_sleep:
+	wl1271_ps_elp_sleep(wl);
+out_unlock:
+	mutex_unlock(&wl->mutex);
+out:
+	return ret;
+
+}
+
+static void wl1271_configure_resume(struct wl1271 *wl)
+{
+	int ret;
+
+	if (wl->bss_type != BSS_TYPE_STA_BSS)
+		return;
+
+	mutex_lock(&wl->mutex);
+	ret = wl1271_ps_elp_wakeup(wl);
+	if (ret < 0)
+		goto out;
+
+	/* exit psm if it wasn't configured */
+	if (!test_bit(WL1271_FLAG_PSM_REQUESTED, &wl->flags))
+		wl1271_ps_set_mode(wl, STATION_ACTIVE_MODE,
+				   wl->basic_rate, true);
+
+	wl1271_ps_elp_sleep(wl);
+out:
+	mutex_unlock(&wl->mutex);
+}
+
+static int wl1271_op_suspend(struct ieee80211_hw *hw,
+			    struct cfg80211_wowlan *wow)
+{
+	struct wl1271 *wl = hw->priv;
+	wl1271_debug(DEBUG_MAC80211, "mac80211 suspend wow=%d", !!wow);
+	wl->wow_enabled = !!wow;
+	if (wl->wow_enabled) {
+		int ret;
+		ret = wl1271_configure_suspend(wl);
+		if (ret < 0) {
+			wl1271_warning("couldn't prepare device to suspend");
+			return ret;
+		}
+		/* flush any remaining work */
+		wl1271_debug(DEBUG_MAC80211, "flushing remaining works");
+		flush_delayed_work(&wl->scan_complete_work);
+
+		/*
+		 * disable and re-enable interrupts in order to flush
+		 * the threaded_irq
+		 */
+		wl1271_disable_interrupts(wl);
+
+		/*
+		 * set suspended flag to avoid triggering a new threaded_irq
+		 * work. no need for spinlock as interrupts are disabled.
+		 */
+		set_bit(WL1271_FLAG_SUSPENDED, &wl->flags);
+
+		wl1271_enable_interrupts(wl);
+		flush_work(&wl->tx_work);
+		flush_delayed_work(&wl->pspoll_work);
+		flush_delayed_work(&wl->elp_work);
+	}
+	return 0;
+}
+
+static int wl1271_op_resume(struct ieee80211_hw *hw)
+{
+	struct wl1271 *wl = hw->priv;
+	wl1271_debug(DEBUG_MAC80211, "mac80211 resume wow=%d",
+		     wl->wow_enabled);
+
+	/*
+	 * re-enable irq_work enqueuing, and call irq_work directly if
+	 * there is a pending work.
+	 */
+	if (wl->wow_enabled) {
+		struct wl1271 *wl = hw->priv;
+		unsigned long flags;
+		bool run_irq_work = false;
+
+		spin_lock_irqsave(&wl->wl_lock, flags);
+		clear_bit(WL1271_FLAG_SUSPENDED, &wl->flags);
+		if (test_and_clear_bit(WL1271_FLAG_PENDING_WORK, &wl->flags))
+			run_irq_work = true;
+		spin_unlock_irqrestore(&wl->wl_lock, flags);
+
+		if (run_irq_work) {
+			wl1271_debug(DEBUG_MAC80211,
+				     "run postponed irq_work directly");
+			wl1271_irq(0, wl);
+			wl1271_enable_interrupts(wl);
+		}
+
+		wl1271_configure_resume(wl);
+	}
+
+	return 0;
+}
+
 static int wl1271_op_start(struct ieee80211_hw *hw)
 {
 	wl1271_debug(DEBUG_MAC80211, "mac80211 start");
@@ -1563,6 +1725,7 @@ static void __wl1271_op_remove_interface(struct wl1271 *wl,
 	memset(wl->ap_hlid_map, 0, sizeof(wl->ap_hlid_map));
 	wl->ap_fw_ps_map = 0;
 	wl->ap_ps_map = 0;
+	wl->sched_scanning = false;
 
 	/*
 	 * this is performed after the cancel_work calls and the associated
@@ -1765,6 +1928,13 @@ static int wl1271_sta_handle_idle(struct wl1271 *wl, bool idle)
 		wl->session_counter++;
 		if (wl->session_counter >= SESSION_COUNTER_MAX)
 			wl->session_counter = 0;
+
+		/* The current firmware only supports sched_scan in idle */
+		if (wl->sched_scanning) {
+			wl1271_scan_sched_scan_stop(wl);
+			ieee80211_sched_scan_stopped(wl->hw);
+		}
+
 		ret = wl1271_dummy_join(wl);
 		if (ret < 0)
 			goto out;
@@ -2317,6 +2487,60 @@ out:
 	return ret;
 }
 
+static int wl1271_op_sched_scan_start(struct ieee80211_hw *hw,
+				      struct ieee80211_vif *vif,
+				      struct cfg80211_sched_scan_request *req,
+				      struct ieee80211_sched_scan_ies *ies)
+{
+	struct wl1271 *wl = hw->priv;
+	int ret;
+
+	wl1271_debug(DEBUG_MAC80211, "wl1271_op_sched_scan_start");
+
+	mutex_lock(&wl->mutex);
+
+	ret = wl1271_ps_elp_wakeup(wl);
+	if (ret < 0)
+		goto out;
+
+	ret = wl1271_scan_sched_scan_config(wl, req, ies);
+	if (ret < 0)
+		goto out_sleep;
+
+	ret = wl1271_scan_sched_scan_start(wl);
+	if (ret < 0)
+		goto out_sleep;
+
+	wl->sched_scanning = true;
+
+out_sleep:
+	wl1271_ps_elp_sleep(wl);
+out:
+	mutex_unlock(&wl->mutex);
+	return ret;
+}
+
+static void wl1271_op_sched_scan_stop(struct ieee80211_hw *hw,
+				      struct ieee80211_vif *vif)
+{
+	struct wl1271 *wl = hw->priv;
+	int ret;
+
+	wl1271_debug(DEBUG_MAC80211, "wl1271_op_sched_scan_stop");
+
+	mutex_lock(&wl->mutex);
+
+	ret = wl1271_ps_elp_wakeup(wl);
+	if (ret < 0)
+		goto out;
+
+	wl1271_scan_sched_scan_stop(wl);
+
+	wl1271_ps_elp_sleep(wl);
+out:
+	mutex_unlock(&wl->mutex);
+}
+
 static int wl1271_op_set_frag_threshold(struct ieee80211_hw *hw, u32 value)
 {
 	struct wl1271 *wl = hw->priv;
@@ -2376,20 +2600,24 @@ out:
 static int wl1271_ssid_set(struct wl1271 *wl, struct sk_buff *skb,
 			    int offset)
 {
-	u8 *ptr = skb->data + offset;
+	u8 ssid_len;
+	const u8 *ptr = cfg80211_find_ie(WLAN_EID_SSID, skb->data + offset,
+					 skb->len - offset);
 
-	/* find the location of the ssid in the beacon */
-	while (ptr < skb->data + skb->len) {
-		if (ptr[0] == WLAN_EID_SSID) {
-			wl->ssid_len = ptr[1];
-			memcpy(wl->ssid, ptr+2, wl->ssid_len);
-			return 0;
-		}
-		ptr += (ptr[1] + 2);
+	if (!ptr) {
+		wl1271_error("No SSID in IEs!");
+		return -ENOENT;
 	}
 
-	wl1271_error("No SSID in IEs!\n");
-	return -ENOENT;
+	ssid_len = ptr[1];
+	if (ssid_len > IEEE80211_MAX_SSID_LEN) {
+		wl1271_error("SSID is too long!");
+		return -EINVAL;
+	}
+
+	wl->ssid_len = ssid_len;
+	memcpy(wl->ssid, ptr+2, ssid_len);
+	return 0;
 }
 
 static int wl1271_bss_erp_info_changed(struct wl1271 *wl,
@@ -3422,12 +3650,16 @@ static const struct ieee80211_ops wl1271_ops = {
 	.stop = wl1271_op_stop,
 	.add_interface = wl1271_op_add_interface,
 	.remove_interface = wl1271_op_remove_interface,
+	.suspend = wl1271_op_suspend,
+	.resume = wl1271_op_resume,
 	.config = wl1271_op_config,
 	.prepare_multicast = wl1271_op_prepare_multicast,
 	.configure_filter = wl1271_op_configure_filter,
 	.tx = wl1271_op_tx,
 	.set_key = wl1271_op_set_key,
 	.hw_scan = wl1271_op_hw_scan,
+	.sched_scan_start = wl1271_op_sched_scan_start,
+	.sched_scan_stop = wl1271_op_sched_scan_stop,
 	.bss_info_changed = wl1271_op_bss_info_changed,
 	.set_frag_threshold = wl1271_op_set_frag_threshold,
 	.set_rts_threshold = wl1271_op_set_rts_threshold,
@@ -3626,6 +3858,7 @@ int wl1271_init_ieee80211(struct wl1271 *wl)
 		IEEE80211_HW_CONNECTION_MONITOR |
 		IEEE80211_HW_SUPPORTS_CQM_RSSI |
 		IEEE80211_HW_REPORTS_TX_ACK_STATUS |
+		IEEE80211_HW_SPECTRUM_MGMT |
 		IEEE80211_HW_AP_LINK_PS;
 
 	wl->hw->wiphy->cipher_suites = cipher_suites;
@@ -3747,6 +3980,7 @@ struct ieee80211_hw *wl1271_alloc_hw(void)
 	wl->ap_fw_ps_map = 0;
 	wl->quirks = 0;
 	wl->platform_quirks = 0;
+	wl->sched_scanning = false;
 
 	memset(wl->tx_frames_map, 0, sizeof(wl->tx_frames_map));
 	for (i = 0; i < ACX_TX_DESCRIPTORS; i++)
diff --git a/drivers/net/wireless/wl12xx/ps.h b/drivers/net/wireless/wl12xx/ps.h
index c41bd0a..25eb9bc 100644
--- a/drivers/net/wireless/wl12xx/ps.h
+++ b/drivers/net/wireless/wl12xx/ps.h
@@ -35,4 +35,6 @@ void wl1271_elp_work(struct work_struct *work);
 void wl1271_ps_link_start(struct wl1271 *wl, u8 hlid, bool clean_queues);
 void wl1271_ps_link_end(struct wl1271 *wl, u8 hlid);
 
+#define WL1271_PS_COMPLETE_TIMEOUT 500
+
 #endif /* __WL1271_PS_H__ */
diff --git a/drivers/net/wireless/wl12xx/scan.c b/drivers/net/wireless/wl12xx/scan.c
index 5d0544c..f37e5a3 100644
--- a/drivers/net/wireless/wl12xx/scan.c
+++ b/drivers/net/wireless/wl12xx/scan.c
@@ -320,3 +320,246 @@ int wl1271_scan(struct wl1271 *wl, const u8 *ssid, size_t ssid_len,
 
 	return 0;
 }
+
+static int
+wl1271_scan_get_sched_scan_channels(struct wl1271 *wl,
+				    struct cfg80211_sched_scan_request *req,
+				    struct conn_scan_ch_params *channels,
+				    u32 band, bool radar, bool passive,
+				    int start)
+{
+	struct conf_sched_scan_settings *c = &wl->conf.sched_scan;
+	int i, j;
+	u32 flags;
+
+	for (i = 0, j = start;
+	     i < req->n_channels && j < MAX_CHANNELS_ALL_BANDS;
+	     i++) {
+		flags = req->channels[i]->flags;
+
+		if (!(flags & IEEE80211_CHAN_DISABLED) &&
+		    ((flags & IEEE80211_CHAN_PASSIVE_SCAN) == passive) &&
+		    ((flags & IEEE80211_CHAN_RADAR) == radar) &&
+		    (req->channels[i]->band == band)) {
+			wl1271_debug(DEBUG_SCAN, "band %d, center_freq %d ",
+				     req->channels[i]->band,
+				     req->channels[i]->center_freq);
+			wl1271_debug(DEBUG_SCAN, "hw_value %d, flags %X",
+				     req->channels[i]->hw_value,
+				     req->channels[i]->flags);
+			wl1271_debug(DEBUG_SCAN, "max_power %d",
+				     req->channels[i]->max_power);
+
+			if (flags & IEEE80211_CHAN_PASSIVE_SCAN) {
+				channels[j].passive_duration =
+					cpu_to_le16(c->dwell_time_passive);
+			} else {
+				channels[j].min_duration =
+					cpu_to_le16(c->min_dwell_time_active);
+				channels[j].max_duration =
+					cpu_to_le16(c->max_dwell_time_active);
+			}
+			channels[j].tx_power_att = req->channels[j]->max_power;
+			channels[j].channel = req->channels[i]->hw_value;
+
+			j++;
+		}
+	}
+
+	return j - start;
+}
+
+static int
+wl1271_scan_sched_scan_channels(struct wl1271 *wl,
+				struct cfg80211_sched_scan_request *req,
+				struct wl1271_cmd_sched_scan_config *cfg)
+{
+	int idx = 0;
+
+	cfg->passive[0] =
+		wl1271_scan_get_sched_scan_channels(wl, req, cfg->channels,
+						    IEEE80211_BAND_2GHZ,
+						    false, true, idx);
+	idx += cfg->passive[0];
+
+	cfg->active[0] =
+		wl1271_scan_get_sched_scan_channels(wl, req, cfg->channels,
+						    IEEE80211_BAND_2GHZ,
+						    false, false, idx);
+	idx += cfg->active[0];
+
+	cfg->passive[1] =
+		wl1271_scan_get_sched_scan_channels(wl, req, cfg->channels,
+						    IEEE80211_BAND_5GHZ,
+						    false, true, idx);
+	idx += cfg->passive[1];
+
+	cfg->active[1] =
+		wl1271_scan_get_sched_scan_channels(wl, req, cfg->channels,
+						    IEEE80211_BAND_5GHZ,
+						    false, false, 14);
+	idx += cfg->active[1];
+
+	cfg->dfs =
+		wl1271_scan_get_sched_scan_channels(wl, req, cfg->channels,
+						    IEEE80211_BAND_5GHZ,
+						    true, false, idx);
+	idx += cfg->dfs;
+
+	wl1271_debug(DEBUG_SCAN, "    2.4GHz: active %d passive %d",
+		     cfg->active[0], cfg->passive[0]);
+	wl1271_debug(DEBUG_SCAN, "    5GHz: active %d passive %d",
+		     cfg->active[1], cfg->passive[1]);
+
+	return idx;
+}
+
+int wl1271_scan_sched_scan_config(struct wl1271 *wl,
+				  struct cfg80211_sched_scan_request *req,
+				  struct ieee80211_sched_scan_ies *ies)
+{
+	struct wl1271_cmd_sched_scan_config *cfg = NULL;
+	struct conf_sched_scan_settings *c = &wl->conf.sched_scan;
+	int i, total_channels, ret;
+
+	wl1271_debug(DEBUG_CMD, "cmd sched_scan scan config");
+
+	cfg = kzalloc(sizeof(*cfg), GFP_KERNEL);
+	if (!cfg)
+		return -ENOMEM;
+
+	cfg->rssi_threshold = c->rssi_threshold;
+	cfg->snr_threshold  = c->snr_threshold;
+	cfg->n_probe_reqs = c->num_probe_reqs;
+	/* cycles set to 0 it means infinite (until manually stopped) */
+	cfg->cycles = 0;
+	/* report APs when at least 1 is found */
+	cfg->report_after = 1;
+	/* don't stop scanning automatically when something is found */
+	cfg->terminate = 0;
+	cfg->tag = WL1271_SCAN_DEFAULT_TAG;
+	/* don't filter on BSS type */
+	cfg->bss_type = SCAN_BSS_TYPE_ANY;
+	/* currently NL80211 supports only a single interval */
+	for (i = 0; i < SCAN_MAX_CYCLE_INTERVALS; i++)
+		cfg->intervals[i] = cpu_to_le32(req->interval);
+
+	if (req->ssids[0].ssid_len && req->ssids[0].ssid) {
+		cfg->filter_type = SCAN_SSID_FILTER_SPECIFIC;
+		cfg->ssid_len = req->ssids[0].ssid_len;
+		memcpy(cfg->ssid, req->ssids[0].ssid,
+		       req->ssids[0].ssid_len);
+	} else {
+		cfg->filter_type = SCAN_SSID_FILTER_ANY;
+		cfg->ssid_len = 0;
+	}
+
+	total_channels = wl1271_scan_sched_scan_channels(wl, req, cfg);
+	if (total_channels == 0) {
+		wl1271_error("scan channel list is empty");
+		ret = -EINVAL;
+		goto out;
+	}
+
+	if (cfg->active[0]) {
+		ret = wl1271_cmd_build_probe_req(wl, req->ssids[0].ssid,
+						 req->ssids[0].ssid_len,
+						 ies->ie[IEEE80211_BAND_2GHZ],
+						 ies->len[IEEE80211_BAND_2GHZ],
+						 IEEE80211_BAND_2GHZ);
+		if (ret < 0) {
+			wl1271_error("2.4GHz PROBE request template failed");
+			goto out;
+		}
+	}
+
+	if (cfg->active[1]) {
+		ret = wl1271_cmd_build_probe_req(wl,  req->ssids[0].ssid,
+						 req->ssids[0].ssid_len,
+						 ies->ie[IEEE80211_BAND_5GHZ],
+						 ies->len[IEEE80211_BAND_5GHZ],
+						 IEEE80211_BAND_5GHZ);
+		if (ret < 0) {
+			wl1271_error("5GHz PROBE request template failed");
+			goto out;
+		}
+	}
+
+	wl1271_dump(DEBUG_SCAN, "SCAN_CFG: ", cfg, sizeof(*cfg));
+
+	ret = wl1271_cmd_send(wl, CMD_CONNECTION_SCAN_CFG, cfg,
+			      sizeof(*cfg), 0);
+	if (ret < 0) {
+		wl1271_error("SCAN configuration failed");
+		goto out;
+	}
+out:
+	kfree(cfg);
+	return ret;
+}
+
+int wl1271_scan_sched_scan_start(struct wl1271 *wl)
+{
+	struct wl1271_cmd_sched_scan_start *start;
+	int ret = 0;
+
+	wl1271_debug(DEBUG_CMD, "cmd periodic scan start");
+
+	if (wl->bss_type != BSS_TYPE_STA_BSS)
+		return -EOPNOTSUPP;
+
+	if (!test_bit(WL1271_FLAG_IDLE, &wl->flags))
+		return -EBUSY;
+
+	start = kzalloc(sizeof(*start), GFP_KERNEL);
+	if (!start)
+		return -ENOMEM;
+
+	start->tag = WL1271_SCAN_DEFAULT_TAG;
+
+	ret = wl1271_cmd_send(wl, CMD_START_PERIODIC_SCAN, start,
+			      sizeof(*start), 0);
+	if (ret < 0) {
+		wl1271_error("failed to send scan start command");
+		goto out_free;
+	}
+
+out_free:
+	kfree(start);
+	return ret;
+}
+
+void wl1271_scan_sched_scan_results(struct wl1271 *wl)
+{
+	wl1271_debug(DEBUG_SCAN, "got periodic scan results");
+
+	ieee80211_sched_scan_results(wl->hw);
+}
+
+void wl1271_scan_sched_scan_stop(struct wl1271 *wl)
+{
+	struct wl1271_cmd_sched_scan_stop *stop;
+	int ret = 0;
+
+	wl1271_debug(DEBUG_CMD, "cmd periodic scan stop");
+
+	/* FIXME: what to do if alloc'ing to stop fails? */
+	stop = kzalloc(sizeof(*stop), GFP_KERNEL);
+	if (!stop) {
+		wl1271_error("failed to alloc memory to send sched scan stop");
+		return;
+	}
+
+	stop->tag = WL1271_SCAN_DEFAULT_TAG;
+
+	ret = wl1271_cmd_send(wl, CMD_STOP_PERIODIC_SCAN, stop,
+			      sizeof(*stop), 0);
+	if (ret < 0) {
+		wl1271_error("failed to send sched scan stop command");
+		goto out_free;
+	}
+	wl->sched_scanning = false;
+
+out_free:
+	kfree(stop);
+}
diff --git a/drivers/net/wireless/wl12xx/scan.h b/drivers/net/wireless/wl12xx/scan.h
index 421a750..c833195 100644
--- a/drivers/net/wireless/wl12xx/scan.h
+++ b/drivers/net/wireless/wl12xx/scan.h
@@ -33,6 +33,12 @@ int wl1271_scan_build_probe_req(struct wl1271 *wl,
 				const u8 *ie, size_t ie_len, u8 band);
 void wl1271_scan_stm(struct wl1271 *wl);
 void wl1271_scan_complete_work(struct work_struct *work);
+int wl1271_scan_sched_scan_config(struct wl1271 *wl,
+				     struct cfg80211_sched_scan_request *req,
+				     struct ieee80211_sched_scan_ies *ies);
+int wl1271_scan_sched_scan_start(struct wl1271 *wl);
+void wl1271_scan_sched_scan_stop(struct wl1271 *wl);
+void wl1271_scan_sched_scan_results(struct wl1271 *wl);
 
 #define WL1271_SCAN_MAX_CHANNELS       24
 #define WL1271_SCAN_DEFAULT_TAG        1
@@ -106,4 +112,112 @@ struct wl1271_cmd_trigger_scan_to {
 	__le32 timeout;
 } __packed;
 
+#define MAX_CHANNELS_ALL_BANDS 41
+#define SCAN_MAX_CYCLE_INTERVALS 16
+#define SCAN_MAX_BANDS 3
+
+enum {
+	SCAN_CHANNEL_TYPE_2GHZ_PASSIVE,
+	SCAN_CHANNEL_TYPE_2GHZ_ACTIVE,
+	SCAN_CHANNEL_TYPE_5GHZ_PASSIVE,
+	SCAN_CHANNEL_TYPE_5GHZ_ACTIVE,
+	SCAN_CHANNEL_TYPE_5GHZ_DFS,
+};
+
+enum {
+	SCAN_SSID_FILTER_ANY      = 0,
+	SCAN_SSID_FILTER_SPECIFIC = 1,
+	SCAN_SSID_FILTER_LIST     = 2,
+	SCAN_SSID_FILTER_DISABLED = 3
+};
+
+enum {
+	SCAN_BSS_TYPE_INDEPENDENT,
+	SCAN_BSS_TYPE_INFRASTRUCTURE,
+	SCAN_BSS_TYPE_ANY,
+};
+
+struct conn_scan_ch_params {
+	__le16 min_duration;
+	__le16 max_duration;
+	__le16 passive_duration;
+
+	u8  channel;
+	u8  tx_power_att;
+
+	/* bit 0: DFS channel; bit 1: DFS enabled */
+	u8  flags;
+
+	u8  padding[3];
+} __packed;
+
+struct wl1271_cmd_sched_scan_config {
+	struct wl1271_cmd_header header;
+
+	__le32 intervals[SCAN_MAX_CYCLE_INTERVALS];
+
+	s8 rssi_threshold; /* for filtering (in dBm) */
+	s8 snr_threshold;  /* for filtering (in dB) */
+
+	u8 cycles;       /* maximum number of scan cycles */
+	u8 report_after; /* report when this number of results are received */
+	u8 terminate;    /* stop scanning after reporting */
+
+	u8 tag;
+	u8 bss_type; /* for filtering */
+	u8 filter_type;
+
+	u8 ssid_len;     /* For SCAN_SSID_FILTER_SPECIFIC */
+	u8 ssid[IW_ESSID_MAX_SIZE];
+
+	u8 n_probe_reqs; /* Number of probes requests per channel */
+
+	u8 passive[SCAN_MAX_BANDS];
+	u8 active[SCAN_MAX_BANDS];
+
+	u8 dfs;
+
+	u8 padding[3];
+
+	struct conn_scan_ch_params channels[MAX_CHANNELS_ALL_BANDS];
+} __packed;
+
+
+#define SCHED_SCAN_MAX_SSIDS 8
+
+enum {
+	SCAN_SSID_TYPE_PUBLIC = 0,
+	SCAN_SSID_TYPE_HIDDEN = 1,
+};
+
+struct wl1271_ssid {
+	u8 type;
+	u8 len;
+	u8 ssid[IW_ESSID_MAX_SIZE];
+	/* u8 padding[2]; */
+} __packed;
+
+struct wl1271_cmd_sched_scan_ssid_list {
+	struct wl1271_cmd_header header;
+
+	u8 n_ssids;
+	struct wl1271_ssid ssids[SCHED_SCAN_MAX_SSIDS];
+	u8 padding[3];
+} __packed;
+
+struct wl1271_cmd_sched_scan_start {
+	struct wl1271_cmd_header header;
+
+	u8 tag;
+	u8 padding[3];
+} __packed;
+
+struct wl1271_cmd_sched_scan_stop {
+	struct wl1271_cmd_header header;
+
+	u8 tag;
+	u8 padding[3];
+} __packed;
+
+
 #endif /* __WL1271_SCAN_H__ */
diff --git a/drivers/net/wireless/wl12xx/sdio.c b/drivers/net/wireless/wl12xx/sdio.c
index bcd4ad7..92d29a8 100644
--- a/drivers/net/wireless/wl12xx/sdio.c
+++ b/drivers/net/wireless/wl12xx/sdio.c
@@ -82,6 +82,16 @@ static irqreturn_t wl1271_hardirq(int irq, void *cookie)
 		complete(wl->elp_compl);
 		wl->elp_compl = NULL;
 	}
+
+	if (test_bit(WL1271_FLAG_SUSPENDED, &wl->flags)) {
+		/* don't enqueue a work right now. mark it as pending */
+		set_bit(WL1271_FLAG_PENDING_WORK, &wl->flags);
+		wl1271_debug(DEBUG_IRQ, "should not enqueue work");
+		disable_irq_nosync(wl->irq);
+		pm_wakeup_event(wl1271_sdio_wl_to_dev(wl), 0);
+		spin_unlock_irqrestore(&wl->wl_lock, flags);
+		return IRQ_HANDLED;
+	}
 	spin_unlock_irqrestore(&wl->wl_lock, flags);
 
 	return IRQ_WAKE_THREAD;
@@ -221,6 +231,7 @@ static int __devinit wl1271_probe(struct sdio_func *func,
 	const struct wl12xx_platform_data *wlan_data;
 	struct wl1271 *wl;
 	unsigned long irqflags;
+	mmc_pm_flag_t mmcflags;
 	int ret;
 
 	/* We are only able to handle the wlan function */
@@ -267,8 +278,18 @@ static int __devinit wl1271_probe(struct sdio_func *func,
 		goto out_free;
 	}
 
+	enable_irq_wake(wl->irq);
+	device_init_wakeup(wl1271_sdio_wl_to_dev(wl), 1);
+
 	disable_irq(wl->irq);
 
+	/* if sdio can keep power while host is suspended, enable wow */
+	mmcflags = sdio_get_host_pm_caps(func);
+	wl1271_debug(DEBUG_SDIO, "sdio PM caps = 0x%x", mmcflags);
+
+	if (mmcflags & MMC_PM_KEEP_POWER)
+		hw->wiphy->wowlan.flags = WIPHY_WOWLAN_ANY;
+
 	ret = wl1271_init_ieee80211(wl);
 	if (ret)
 		goto out_irq;
@@ -303,6 +324,8 @@ static void __devexit wl1271_remove(struct sdio_func *func)
 	pm_runtime_get_noresume(&func->dev);
 
 	wl1271_unregister_hw(wl);
+	device_init_wakeup(wl1271_sdio_wl_to_dev(wl), 0);
+	disable_irq_wake(wl->irq);
 	free_irq(wl->irq, wl);
 	wl1271_free_hw(wl);
 }
@@ -311,11 +334,50 @@ static int wl1271_suspend(struct device *dev)
 {
 	/* Tell MMC/SDIO core it's OK to power down the card
 	 * (if it isn't already), but not to remove it completely */
-	return 0;
+	struct sdio_func *func = dev_to_sdio_func(dev);
+	struct wl1271 *wl = sdio_get_drvdata(func);
+	mmc_pm_flag_t sdio_flags;
+	int ret = 0;
+
+	wl1271_debug(DEBUG_MAC80211, "wl1271 suspend. wow_enabled: %d",
+		     wl->wow_enabled);
+
+	/* check whether sdio should keep power */
+	if (wl->wow_enabled) {
+		sdio_flags = sdio_get_host_pm_caps(func);
+
+		if (!(sdio_flags & MMC_PM_KEEP_POWER)) {
+			wl1271_error("can't keep power while host "
+				     "is suspended");
+			ret = -EINVAL;
+			goto out;
+		}
+
+		/* keep power while host suspended */
+		ret = sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
+		if (ret) {
+			wl1271_error("error while trying to keep power");
+			goto out;
+		}
+
+		/* release host */
+		sdio_release_host(func);
+	}
+out:
+	return ret;
 }
 
 static int wl1271_resume(struct device *dev)
 {
+	struct sdio_func *func = dev_to_sdio_func(dev);
+	struct wl1271 *wl = sdio_get_drvdata(func);
+
+	wl1271_debug(DEBUG_MAC80211, "wl1271 resume");
+	if (wl->wow_enabled) {
+		/* claim back host */
+		sdio_claim_host(func);
+	}
+
 	return 0;
 }
 
diff --git a/drivers/net/wireless/wl12xx/wl12xx.h b/drivers/net/wireless/wl12xx/wl12xx.h
index b760143..fbe8f46 100644
--- a/drivers/net/wireless/wl12xx/wl12xx.h
+++ b/drivers/net/wireless/wl12xx/wl12xx.h
@@ -351,13 +351,14 @@ enum wl12xx_flags {
 	WL1271_FLAG_PSM_REQUESTED,
 	WL1271_FLAG_IRQ_RUNNING,
 	WL1271_FLAG_IDLE,
-	WL1271_FLAG_IDLE_REQUESTED,
 	WL1271_FLAG_PSPOLL_FAILURE,
 	WL1271_FLAG_STA_STATE_SENT,
 	WL1271_FLAG_FW_TX_BUSY,
 	WL1271_FLAG_AP_STARTED,
 	WL1271_FLAG_IF_INITIALIZED,
 	WL1271_FLAG_DUMMY_PACKET_PENDING,
+	WL1271_FLAG_SUSPENDED,
+	WL1271_FLAG_PENDING_WORK,
 };
 
 struct wl1271_link {
@@ -480,6 +481,8 @@ struct wl1271 {
 	struct wl1271_scan scan;
 	struct delayed_work scan_complete_work;
 
+	bool sched_scanning;
+
 	/* probe-req template for the current AP */
 	struct sk_buff *probereq;
 
@@ -510,6 +513,7 @@ struct wl1271 {
 	unsigned int rx_filter;
 
 	struct completion *elp_compl;
+	struct completion *ps_compl;
 	struct delayed_work elp_work;
 	struct delayed_work pspoll_work;
 
@@ -564,6 +568,12 @@ struct wl1271 {
 	int tcxo_clock;
 
 	/*
+	 * wowlan trigger was configured during suspend.
+	 * (currently, only "ANY" trigger is supported)
+	 */
+	bool wow_enabled;
+
+	/*
 	 * AP-mode - links indexed by HLID. The global and broadcast links
 	 * are always active.
 	 */