[linux-block.git] / drivers / net / wireless / ti / wl12xx / scan.c

/*
 * This file is part of wl12xx
 *
 * Copyright (C) 2012 Texas Instruments. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA
 *
 */

#include <linux/ieee80211.h>
#include "scan.h"
#include "../wlcore/debug.h"
#include "../wlcore/tx.h"

static int wl1271_get_scan_channels(struct wl1271 *wl,
				    struct cfg80211_scan_request *req,
				    struct basic_scan_channel_params *channels,
				    enum nl80211_band band, bool passive)
{
	struct conf_scan_settings *c = &wl->conf.scan;
	int i, j;
	u32 flags;

	for (i = 0, j = 0;
	     i < req->n_channels && j < WL1271_SCAN_MAX_CHANNELS;
	     i++) {
		flags = req->channels[i]->flags;

		if (!test_bit(i, wl->scan.scanned_ch) &&
		    !(flags & IEEE80211_CHAN_DISABLED) &&
		    (req->channels[i]->band == band) &&
		    /*
		     * In passive scans, we scan all remaining
		     * channels, even if not marked as such.
		     * In active scans, we only scan channels not
		     * marked as passive.
		     */
		    (passive || !(flags & IEEE80211_CHAN_NO_IR))) {
			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_antenna_gain %d, max_power %d",
				     req->channels[i]->max_antenna_gain,
				     req->channels[i]->max_power);
			wl1271_debug(DEBUG_SCAN, "beacon_found %d",
				     req->channels[i]->beacon_found);

			if (!passive) {
				channels[j].min_duration =
					cpu_to_le32(c->min_dwell_time_active);
				channels[j].max_duration =
					cpu_to_le32(c->max_dwell_time_active);
			} else {
				channels[j].min_duration =
					cpu_to_le32(c->dwell_time_passive);
				channels[j].max_duration =
					cpu_to_le32(c->dwell_time_passive);
			}
			channels[j].early_termination = 0;
			channels[j].tx_power_att = req->channels[i]->max_power;
			channels[j].channel = req->channels[i]->hw_value;

			memset(&channels[j].bssid_lsb, 0xff, 4);
			memset(&channels[j].bssid_msb, 0xff, 2);

			/* Mark the channels we already used */
			set_bit(i, wl->scan.scanned_ch);

			j++;
		}
	}

	return j;
}

#define WL1271_NOTHING_TO_SCAN 1

static int wl1271_scan_send(struct wl1271 *wl, struct wl12xx_vif *wlvif,
			    enum nl80211_band band,
			    bool passive, u32 basic_rate)
{
	struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);
	struct wl1271_cmd_scan *cmd;
	struct wl1271_cmd_trigger_scan_to *trigger;
	int ret;
	u16 scan_options = 0;

	/* skip active scans if we don't have SSIDs */
	if (!passive && wl->scan.req->n_ssids == 0)
		return WL1271_NOTHING_TO_SCAN;

	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
	trigger = kzalloc(sizeof(*trigger), GFP_KERNEL);
	if (!cmd || !trigger) {
		ret = -ENOMEM;
		goto out;
	}

	if (wl->conf.scan.split_scan_timeout)
		scan_options |= WL1271_SCAN_OPT_SPLIT_SCAN;

	if (passive)
		scan_options |= WL1271_SCAN_OPT_PASSIVE;

	/* scan on the dev role if the regular one is not started */
	if (wlcore_is_p2p_mgmt(wlvif))
		cmd->params.role_id = wlvif->dev_role_id;
	else
		cmd->params.role_id = wlvif->role_id;

	if (WARN_ON(cmd->params.role_id == WL12XX_INVALID_ROLE_ID)) {
		ret = -EINVAL;
		goto out;
	}

	cmd->params.scan_options = cpu_to_le16(scan_options);

	cmd->params.n_ch = wl1271_get_scan_channels(wl, wl->scan.req,
						    cmd->channels,
						    band, passive);
	if (cmd->params.n_ch == 0) {
		ret = WL1271_NOTHING_TO_SCAN;
		goto out;
	}

	cmd->params.tx_rate = cpu_to_le32(basic_rate);
	cmd->params.n_probe_reqs = wl->conf.scan.num_probe_reqs;
	cmd->params.tid_trigger = CONF_TX_AC_ANY_TID;
	cmd->params.scan_tag = WL1271_SCAN_DEFAULT_TAG;

	if (band == NL80211_BAND_2GHZ)
		cmd->params.band = WL1271_SCAN_BAND_2_4_GHZ;
	else
		cmd->params.band = WL1271_SCAN_BAND_5_GHZ;

	if (wl->scan.ssid_len) {
		cmd->params.ssid_len = wl->scan.ssid_len;
		memcpy(cmd->params.ssid, wl->scan.ssid, wl->scan.ssid_len);
	}

	memcpy(cmd->addr, vif->addr, ETH_ALEN);

	ret = wl12xx_cmd_build_probe_req(wl, wlvif,
					 cmd->params.role_id, band,
					 wl->scan.ssid, wl->scan.ssid_len,
					 wl->scan.req->ie,
					 wl->scan.req->ie_len, NULL, 0, false);
	if (ret < 0) {
		wl1271_error("PROBE request template failed");
		goto out;
	}

	trigger->timeout = cpu_to_le32(wl->conf.scan.split_scan_timeout);
	ret = wl1271_cmd_send(wl, CMD_TRIGGER_SCAN_TO, trigger,
			      sizeof(*trigger), 0);
	if (ret < 0) {
		wl1271_error("trigger scan to failed for hw scan");
		goto out;
	}

	wl1271_dump(DEBUG_SCAN, "SCAN: ", cmd, sizeof(*cmd));

	ret = wl1271_cmd_send(wl, CMD_SCAN, cmd, sizeof(*cmd), 0);
	if (ret < 0) {
		wl1271_error("SCAN failed");
		goto out;
	}

out:
	kfree(cmd);
	kfree(trigger);
	return ret;
}

int wl12xx_scan_stop(struct wl1271 *wl, struct wl12xx_vif *wlvif)
{
	struct wl1271_cmd_header *cmd = NULL;
	int ret = 0;

	if (WARN_ON(wl->scan.state == WL1271_SCAN_STATE_IDLE))
		return -EINVAL;

	wl1271_debug(DEBUG_CMD, "cmd scan stop");

	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
	if (!cmd) {
		ret = -ENOMEM;
		goto out;
	}

	ret = wl1271_cmd_send(wl, CMD_STOP_SCAN, cmd,
			      sizeof(*cmd), 0);
	if (ret < 0) {
		wl1271_error("cmd stop_scan failed");
		goto out;
	}
out:
	kfree(cmd);
	return ret;
}

void wl1271_scan_stm(struct wl1271 *wl, struct wl12xx_vif *wlvif)
{
	int ret = 0;
	enum nl80211_band band;
	u32 rate, mask;

	switch (wl->scan.state) {
	case WL1271_SCAN_STATE_IDLE:
		break;

	case WL1271_SCAN_STATE_2GHZ_ACTIVE:
		band = NL80211_BAND_2GHZ;
		mask = wlvif->bitrate_masks[band];
		if (wl->scan.req->no_cck) {
			mask &= ~CONF_TX_CCK_RATES;
			if (!mask)
				mask = CONF_TX_RATE_MASK_BASIC_P2P;
		}
		rate = wl1271_tx_min_rate_get(wl, mask);
		ret = wl1271_scan_send(wl, wlvif, band, false, rate);
		if (ret == WL1271_NOTHING_TO_SCAN) {
			wl->scan.state = WL1271_SCAN_STATE_2GHZ_PASSIVE;
			wl1271_scan_stm(wl, wlvif);
		}

		break;

	case WL1271_SCAN_STATE_2GHZ_PASSIVE:
		band = NL80211_BAND_2GHZ;
		mask = wlvif->bitrate_masks[band];
		if (wl->scan.req->no_cck) {
			mask &= ~CONF_TX_CCK_RATES;
			if (!mask)
				mask = CONF_TX_RATE_MASK_BASIC_P2P;
		}
		rate = wl1271_tx_min_rate_get(wl, mask);
		ret = wl1271_scan_send(wl, wlvif, band, true, rate);
		if (ret == WL1271_NOTHING_TO_SCAN) {
			if (wl->enable_11a)
				wl->scan.state = WL1271_SCAN_STATE_5GHZ_ACTIVE;
			else
				wl->scan.state = WL1271_SCAN_STATE_DONE;
			wl1271_scan_stm(wl, wlvif);
		}

		break;

	case WL1271_SCAN_STATE_5GHZ_ACTIVE:
		band = NL80211_BAND_5GHZ;
		rate = wl1271_tx_min_rate_get(wl, wlvif->bitrate_masks[band]);
		ret = wl1271_scan_send(wl, wlvif, band, false, rate);
		if (ret == WL1271_NOTHING_TO_SCAN) {
			wl->scan.state = WL1271_SCAN_STATE_5GHZ_PASSIVE;
			wl1271_scan_stm(wl, wlvif);
		}

		break;

	case WL1271_SCAN_STATE_5GHZ_PASSIVE:
		band = NL80211_BAND_5GHZ;
		rate = wl1271_tx_min_rate_get(wl, wlvif->bitrate_masks[band]);
		ret = wl1271_scan_send(wl, wlvif, band, true, rate);
		if (ret == WL1271_NOTHING_TO_SCAN) {
			wl->scan.state = WL1271_SCAN_STATE_DONE;
			wl1271_scan_stm(wl, wlvif);
		}

		break;

	case WL1271_SCAN_STATE_DONE:
		wl->scan.failed = false;
		cancel_delayed_work(&wl->scan_complete_work);
		ieee80211_queue_delayed_work(wl->hw, &wl->scan_complete_work,
					     msecs_to_jiffies(0));
		break;

	default:
		wl1271_error("invalid scan state");
		break;
	}

	if (ret < 0) {
		cancel_delayed_work(&wl->scan_complete_work);
		ieee80211_queue_delayed_work(wl->hw, &wl->scan_complete_work,
					     msecs_to_jiffies(0));
	}
}

static void wl12xx_adjust_channels(struct wl1271_cmd_sched_scan_config *cmd,
				   struct wlcore_scan_channels *cmd_channels)
{
	memcpy(cmd->passive, cmd_channels->passive, sizeof(cmd->passive));
	memcpy(cmd->active, cmd_channels->active, sizeof(cmd->active));
	cmd->dfs = cmd_channels->dfs;
	cmd->n_pactive_ch = cmd_channels->passive_active;

	memcpy(cmd->channels_2, cmd_channels->channels_2,
	       sizeof(cmd->channels_2));
	memcpy(cmd->channels_5, cmd_channels->channels_5,
	       sizeof(cmd->channels_5));
	/* channels_4 are not supported, so no need to copy them */
}

int wl1271_scan_sched_scan_config(struct wl1271 *wl,
				  struct wl12xx_vif *wlvif,
				  struct cfg80211_sched_scan_request *req,
				  struct ieee80211_scan_ies *ies)
{
	struct wl1271_cmd_sched_scan_config *cfg = NULL;
	struct wlcore_scan_channels *cfg_channels = NULL;
	struct conf_sched_scan_settings *c = &wl->conf.sched_scan;
	int i, ret;
	bool force_passive = !req->n_ssids;

	wl1271_debug(DEBUG_CMD, "cmd sched_scan scan config");

	cfg = kzalloc(sizeof(*cfg), GFP_KERNEL);
	if (!cfg)
		return -ENOMEM;

	cfg->role_id = wlvif->role_id;
	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->scan_plans[0].interval *
						MSEC_PER_SEC);

	cfg->ssid_len = 0;
	ret = wlcore_scan_sched_scan_ssid_list(wl, wlvif, req);
	if (ret < 0)
		goto out;

	cfg->filter_type = ret;

	wl1271_debug(DEBUG_SCAN, "filter_type = %d", cfg->filter_type);

	cfg_channels = kzalloc(sizeof(*cfg_channels), GFP_KERNEL);
	if (!cfg_channels) {
		ret = -ENOMEM;
		goto out;
	}

	if (!wlcore_set_scan_chan_params(wl, cfg_channels, req->channels,
					 req->n_channels, req->n_ssids,
					 SCAN_TYPE_PERIODIC)) {
		wl1271_error("scan channel list is empty");
		ret = -EINVAL;
		goto out;
	}
	wl12xx_adjust_channels(cfg, cfg_channels);

	if (!force_passive && cfg->active[0]) {
		u8 band = NL80211_BAND_2GHZ;
		ret = wl12xx_cmd_build_probe_req(wl, wlvif,
						 wlvif->role_id, band,
						 req->ssids[0].ssid,
						 req->ssids[0].ssid_len,
						 ies->ies[band],
						 ies->len[band],
						 ies->common_ies,
						 ies->common_ie_len,
						 true);
		if (ret < 0) {
			wl1271_error("2.4GHz PROBE request template failed");
			goto out;
		}
	}

	if (!force_passive && cfg->active[1]) {
		u8 band = NL80211_BAND_5GHZ;
		ret = wl12xx_cmd_build_probe_req(wl, wlvif,
						 wlvif->role_id, band,
						 req->ssids[0].ssid,
						 req->ssids[0].ssid_len,
						 ies->ies[band],
						 ies->len[band],
						 ies->common_ies,
						 ies->common_ie_len,
						 true);
		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_channels);
	kfree(cfg);
	return ret;
}

int wl1271_scan_sched_scan_start(struct wl1271 *wl, struct wl12xx_vif *wlvif)
{
	struct wl1271_cmd_sched_scan_start *start;
	int ret = 0;

	wl1271_debug(DEBUG_CMD, "cmd periodic scan start");

	if (wlvif->bss_type != BSS_TYPE_STA_BSS)
		return -EOPNOTSUPP;

	if ((wl->quirks & WLCORE_QUIRK_NO_SCHED_SCAN_WHILE_CONN) &&
	    test_bit(WLVIF_FLAG_IN_USE, &wlvif->flags))
		return -EBUSY;

	start = kzalloc(sizeof(*start), GFP_KERNEL);
	if (!start)
		return -ENOMEM;

	start->role_id = wlvif->role_id;
	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;
}

int wl12xx_sched_scan_start(struct wl1271 *wl, struct wl12xx_vif  *wlvif,
			    struct cfg80211_sched_scan_request *req,
			    struct ieee80211_scan_ies *ies)
{
	int ret;

	ret = wl1271_scan_sched_scan_config(wl, wlvif, req, ies);
	if (ret < 0)
		return ret;

	return wl1271_scan_sched_scan_start(wl, wlvif);
}

void wl12xx_scan_sched_scan_stop(struct wl1271 *wl,  struct wl12xx_vif *wlvif)
{
	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->role_id = wlvif->role_id;
	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;
	}

out_free:
	kfree(stop);
}

int wl12xx_scan_start(struct wl1271 *wl, struct wl12xx_vif *wlvif,
		      struct cfg80211_scan_request *req)
{
	wl1271_scan_stm(wl, wlvif);
	return 0;
}

void wl12xx_scan_completed(struct wl1271 *wl, struct wl12xx_vif *wlvif)
{
	wl1271_scan_stm(wl, wlvif);
}
Commit	Line	Data
78e28062 EP	1	/*
	2	* This file is part of wl12xx
	3	*
	4	* Copyright (C) 2012 Texas Instruments. All rights reserved.
	5	*
	6	* This program is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU General Public License
	8	* version 2 as published by the Free Software Foundation.
	9	*
	10	* This program is distributed in the hope that it will be useful, but
	11	* WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	13	* General Public License for more details.
	14	*
	15	* You should have received a copy of the GNU General Public License
	16	* along with this program; if not, write to the Free Software
	17	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
	18	* 02110-1301 USA
	19	*
	20	*/
	21
	22	#include <linux/ieee80211.h>
	23	#include "scan.h"
	24	#include "../wlcore/debug.h"
	25	#include "../wlcore/tx.h"
	26
	27	static int wl1271_get_scan_channels(struct wl1271 *wl,
	28	struct cfg80211_scan_request *req,
	29	struct basic_scan_channel_params *channels,
57fbcce3	30	enum nl80211_band band, bool passive)
78e28062 EP	31	{
	32	struct conf_scan_settings *c = &wl->conf.scan;
	33	int i, j;
	34	u32 flags;
	35
	36	for (i = 0, j = 0;
	37	i < req->n_channels && j < WL1271_SCAN_MAX_CHANNELS;
	38	i++) {
	39	flags = req->channels[i]->flags;
	40
	41	if (!test_bit(i, wl->scan.scanned_ch) &&
	42	!(flags & IEEE80211_CHAN_DISABLED) &&
	43	(req->channels[i]->band == band) &&
	44	/*
	45	* In passive scans, we scan all remaining
	46	* channels, even if not marked as such.
	47	* In active scans, we only scan channels not
	48	* marked as passive.
	49	*/
8fe02e16	50	(passive \|\| !(flags & IEEE80211_CHAN_NO_IR))) {
78e28062 EP	51	wl1271_debug(DEBUG_SCAN, "band %d, center_freq %d ",
	52	req->channels[i]->band,
	53	req->channels[i]->center_freq);
	54	wl1271_debug(DEBUG_SCAN, "hw_value %d, flags %X",
	55	req->channels[i]->hw_value,
	56	req->channels[i]->flags);
	57	wl1271_debug(DEBUG_SCAN,
	58	"max_antenna_gain %d, max_power %d",
	59	req->channels[i]->max_antenna_gain,
	60	req->channels[i]->max_power);
	61	wl1271_debug(DEBUG_SCAN, "beacon_found %d",
	62	req->channels[i]->beacon_found);
	63
	64	if (!passive) {
	65	channels[j].min_duration =
	66	cpu_to_le32(c->min_dwell_time_active);
	67	channels[j].max_duration =
	68	cpu_to_le32(c->max_dwell_time_active);
	69	} else {
	70	channels[j].min_duration =
7c482c10	71	cpu_to_le32(c->dwell_time_passive);
78e28062	72	channels[j].max_duration =
7c482c10	73	cpu_to_le32(c->dwell_time_passive);
78e28062 EP	74	}
	75	channels[j].early_termination = 0;
	76	channels[j].tx_power_att = req->channels[i]->max_power;
	77	channels[j].channel = req->channels[i]->hw_value;
	78
	79	memset(&channels[j].bssid_lsb, 0xff, 4);
	80	memset(&channels[j].bssid_msb, 0xff, 2);
	81
	82	/* Mark the channels we already used */
	83	set_bit(i, wl->scan.scanned_ch);
	84
	85	j++;
	86	}
	87	}
	88
	89	return j;
	90	}
	91
	92	#define WL1271_NOTHING_TO_SCAN 1
	93
	94	static int wl1271_scan_send(struct wl1271 wl, struct wl12xx_vif wlvif,
57fbcce3	95	enum nl80211_band band,
78e28062 EP	96	bool passive, u32 basic_rate)
	97	{
	98	struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);
	99	struct wl1271_cmd_scan *cmd;
	100	struct wl1271_cmd_trigger_scan_to *trigger;
	101	int ret;
	102	u16 scan_options = 0;
	103
	104	/* skip active scans if we don't have SSIDs */
	105	if (!passive && wl->scan.req->n_ssids == 0)
	106	return WL1271_NOTHING_TO_SCAN;
	107
	108	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
	109	trigger = kzalloc(sizeof(*trigger), GFP_KERNEL);
	110	if (!cmd \|\| !trigger) {
	111	ret = -ENOMEM;
	112	goto out;
	113	}
	114
	115	if (wl->conf.scan.split_scan_timeout)
	116	scan_options \|= WL1271_SCAN_OPT_SPLIT_SCAN;
	117
	118	if (passive)
	119	scan_options \|= WL1271_SCAN_OPT_PASSIVE;
	120
7845af35 EP	121	/* scan on the dev role if the regular one is not started */
	122	if (wlcore_is_p2p_mgmt(wlvif))
	123	cmd->params.role_id = wlvif->dev_role_id;
	124	else
	125	cmd->params.role_id = wlvif->role_id;
78e28062 EP	126
	127	if (WARN_ON(cmd->params.role_id == WL12XX_INVALID_ROLE_ID)) {
	128	ret = -EINVAL;
	129	goto out;
	130	}
	131
	132	cmd->params.scan_options = cpu_to_le16(scan_options);
	133
	134	cmd->params.n_ch = wl1271_get_scan_channels(wl, wl->scan.req,
	135	cmd->channels,
	136	band, passive);
	137	if (cmd->params.n_ch == 0) {
	138	ret = WL1271_NOTHING_TO_SCAN;
	139	goto out;
	140	}
	141
	142	cmd->params.tx_rate = cpu_to_le32(basic_rate);
	143	cmd->params.n_probe_reqs = wl->conf.scan.num_probe_reqs;
	144	cmd->params.tid_trigger = CONF_TX_AC_ANY_TID;
	145	cmd->params.scan_tag = WL1271_SCAN_DEFAULT_TAG;
	146
57fbcce3	147	if (band == NL80211_BAND_2GHZ)
78e28062 EP	148	cmd->params.band = WL1271_SCAN_BAND_2_4_GHZ;
	149	else
	150	cmd->params.band = WL1271_SCAN_BAND_5_GHZ;
	151
e32993eb	152	if (wl->scan.ssid_len) {
78e28062 EP	153	cmd->params.ssid_len = wl->scan.ssid_len;
	154	memcpy(cmd->params.ssid, wl->scan.ssid, wl->scan.ssid_len);
	155	}
	156
	157	memcpy(cmd->addr, vif->addr, ETH_ALEN);
	158
	159	ret = wl12xx_cmd_build_probe_req(wl, wlvif,
	160	cmd->params.role_id, band,
	161	wl->scan.ssid, wl->scan.ssid_len,
	162	wl->scan.req->ie,
633e2713	163	wl->scan.req->ie_len, NULL, 0, false);
78e28062 EP	164	if (ret < 0) {
	165	wl1271_error("PROBE request template failed");
	166	goto out;
	167	}
	168
	169	trigger->timeout = cpu_to_le32(wl->conf.scan.split_scan_timeout);
	170	ret = wl1271_cmd_send(wl, CMD_TRIGGER_SCAN_TO, trigger,
	171	sizeof(*trigger), 0);
	172	if (ret < 0) {
	173	wl1271_error("trigger scan to failed for hw scan");
	174	goto out;
	175	}
	176
	177	wl1271_dump(DEBUG_SCAN, "SCAN: ", cmd, sizeof(*cmd));
	178
	179	ret = wl1271_cmd_send(wl, CMD_SCAN, cmd, sizeof(*cmd), 0);
	180	if (ret < 0) {
	181	wl1271_error("SCAN failed");
	182	goto out;
	183	}
	184
	185	out:
	186	kfree(cmd);
	187	kfree(trigger);
	188	return ret;
	189	}
	190
	191	int wl12xx_scan_stop(struct wl1271 wl, struct wl12xx_vif wlvif)
	192	{
	193	struct wl1271_cmd_header *cmd = NULL;
	194	int ret = 0;
	195
	196	if (WARN_ON(wl->scan.state == WL1271_SCAN_STATE_IDLE))
	197	return -EINVAL;
	198
	199	wl1271_debug(DEBUG_CMD, "cmd scan stop");
	200
	201	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
	202	if (!cmd) {
	203	ret = -ENOMEM;
	204	goto out;
	205	}
	206
	207	ret = wl1271_cmd_send(wl, CMD_STOP_SCAN, cmd,
	208	sizeof(*cmd), 0);
	209	if (ret < 0) {
	210	wl1271_error("cmd stop_scan failed");
	211	goto out;
	212	}
	213	out:
	214	kfree(cmd);
	215	return ret;
	216	}
	217
	218	void wl1271_scan_stm(struct wl1271 wl, struct wl12xx_vif wlvif)
	219	{
	220	int ret = 0;
57fbcce3	221	enum nl80211_band band;
78e28062 EP	222	u32 rate, mask;
	223
	224	switch (wl->scan.state) {
	225	case WL1271_SCAN_STATE_IDLE:
	226	break;
	227
	228	case WL1271_SCAN_STATE_2GHZ_ACTIVE:
57fbcce3	229	band = NL80211_BAND_2GHZ;
78e28062 EP	230	mask = wlvif->bitrate_masks[band];
	231	if (wl->scan.req->no_cck) {
	232	mask &= ~CONF_TX_CCK_RATES;
	233	if (!mask)
	234	mask = CONF_TX_RATE_MASK_BASIC_P2P;
	235	}
	236	rate = wl1271_tx_min_rate_get(wl, mask);
	237	ret = wl1271_scan_send(wl, wlvif, band, false, rate);
	238	if (ret == WL1271_NOTHING_TO_SCAN) {
	239	wl->scan.state = WL1271_SCAN_STATE_2GHZ_PASSIVE;
	240	wl1271_scan_stm(wl, wlvif);
	241	}
	242
	243	break;
	244
	245	case WL1271_SCAN_STATE_2GHZ_PASSIVE:
57fbcce3	246	band = NL80211_BAND_2GHZ;
78e28062 EP	247	mask = wlvif->bitrate_masks[band];
	248	if (wl->scan.req->no_cck) {
	249	mask &= ~CONF_TX_CCK_RATES;
	250	if (!mask)
	251	mask = CONF_TX_RATE_MASK_BASIC_P2P;
	252	}
	253	rate = wl1271_tx_min_rate_get(wl, mask);
	254	ret = wl1271_scan_send(wl, wlvif, band, true, rate);
	255	if (ret == WL1271_NOTHING_TO_SCAN) {
	256	if (wl->enable_11a)
	257	wl->scan.state = WL1271_SCAN_STATE_5GHZ_ACTIVE;
	258	else
	259	wl->scan.state = WL1271_SCAN_STATE_DONE;
	260	wl1271_scan_stm(wl, wlvif);
	261	}
	262
	263	break;
	264
	265	case WL1271_SCAN_STATE_5GHZ_ACTIVE:
57fbcce3	266	band = NL80211_BAND_5GHZ;
78e28062 EP	267	rate = wl1271_tx_min_rate_get(wl, wlvif->bitrate_masks[band]);
	268	ret = wl1271_scan_send(wl, wlvif, band, false, rate);
	269	if (ret == WL1271_NOTHING_TO_SCAN) {
	270	wl->scan.state = WL1271_SCAN_STATE_5GHZ_PASSIVE;
	271	wl1271_scan_stm(wl, wlvif);
	272	}
	273
	274	break;
	275
	276	case WL1271_SCAN_STATE_5GHZ_PASSIVE:
57fbcce3	277	band = NL80211_BAND_5GHZ;
78e28062 EP	278	rate = wl1271_tx_min_rate_get(wl, wlvif->bitrate_masks[band]);
	279	ret = wl1271_scan_send(wl, wlvif, band, true, rate);
	280	if (ret == WL1271_NOTHING_TO_SCAN) {
	281	wl->scan.state = WL1271_SCAN_STATE_DONE;
	282	wl1271_scan_stm(wl, wlvif);
	283	}
	284
	285	break;
	286
	287	case WL1271_SCAN_STATE_DONE:
	288	wl->scan.failed = false;
	289	cancel_delayed_work(&wl->scan_complete_work);
	290	ieee80211_queue_delayed_work(wl->hw, &wl->scan_complete_work,
	291	msecs_to_jiffies(0));
	292	break;
	293
	294	default:
	295	wl1271_error("invalid scan state");
	296	break;
	297	}
	298
	299	if (ret < 0) {
	300	cancel_delayed_work(&wl->scan_complete_work);
	301	ieee80211_queue_delayed_work(wl->hw, &wl->scan_complete_work,
	302	msecs_to_jiffies(0));
	303	}
	304	}
	305
	306	static void wl12xx_adjust_channels(struct wl1271_cmd_sched_scan_config *cmd,
	307	struct wlcore_scan_channels *cmd_channels)
	308	{
	309	memcpy(cmd->passive, cmd_channels->passive, sizeof(cmd->passive));
	310	memcpy(cmd->active, cmd_channels->active, sizeof(cmd->active));
	311	cmd->dfs = cmd_channels->dfs;
	312	cmd->n_pactive_ch = cmd_channels->passive_active;
	313
	314	memcpy(cmd->channels_2, cmd_channels->channels_2,
	315	sizeof(cmd->channels_2));
	316	memcpy(cmd->channels_5, cmd_channels->channels_5,
a805de4d	317	sizeof(cmd->channels_5));
78e28062 EP	318	/* channels_4 are not supported, so no need to copy them */
	319	}
	320
	321	int wl1271_scan_sched_scan_config(struct wl1271 *wl,
	322	struct wl12xx_vif *wlvif,
	323	struct cfg80211_sched_scan_request *req,
633e2713	324	struct ieee80211_scan_ies *ies)
78e28062 EP	325	{
	326	struct wl1271_cmd_sched_scan_config *cfg = NULL;
	327	struct wlcore_scan_channels *cfg_channels = NULL;
	328	struct conf_sched_scan_settings *c = &wl->conf.sched_scan;
	329	int i, ret;
	330	bool force_passive = !req->n_ssids;
	331
	332	wl1271_debug(DEBUG_CMD, "cmd sched_scan scan config");
	333
	334	cfg = kzalloc(sizeof(*cfg), GFP_KERNEL);
	335	if (!cfg)
	336	return -ENOMEM;
	337
	338	cfg->role_id = wlvif->role_id;
	339	cfg->rssi_threshold = c->rssi_threshold;
	340	cfg->snr_threshold = c->snr_threshold;
	341	cfg->n_probe_reqs = c->num_probe_reqs;
	342	/* cycles set to 0 it means infinite (until manually stopped) */
	343	cfg->cycles = 0;
	344	/* report APs when at least 1 is found */
	345	cfg->report_after = 1;
	346	/* don't stop scanning automatically when something is found */
	347	cfg->terminate = 0;
	348	cfg->tag = WL1271_SCAN_DEFAULT_TAG;
	349	/* don't filter on BSS type */
	350	cfg->bss_type = SCAN_BSS_TYPE_ANY;
	351	/* currently NL80211 supports only a single interval */
	352	for (i = 0; i < SCAN_MAX_CYCLE_INTERVALS; i++)
3b06d277 AS	353	cfg->intervals[i] = cpu_to_le32(req->scan_plans[0].interval *
3b06d277 AS	354	MSEC_PER_SEC);
78e28062 EP	355
	356	cfg->ssid_len = 0;
	357	ret = wlcore_scan_sched_scan_ssid_list(wl, wlvif, req);
	358	if (ret < 0)
	359	goto out;
	360
	361	cfg->filter_type = ret;
	362
	363	wl1271_debug(DEBUG_SCAN, "filter_type = %d", cfg->filter_type);
	364
	365	cfg_channels = kzalloc(sizeof(*cfg_channels), GFP_KERNEL);
	366	if (!cfg_channels) {
	367	ret = -ENOMEM;
	368	goto out;
	369	}
	370
	371	if (!wlcore_set_scan_chan_params(wl, cfg_channels, req->channels,
7c482c10 EP	372	req->n_channels, req->n_ssids,
7c482c10 EP	373	SCAN_TYPE_PERIODIC)) {
78e28062 EP	374	wl1271_error("scan channel list is empty");
	375	ret = -EINVAL;
	376	goto out;
	377	}
	378	wl12xx_adjust_channels(cfg, cfg_channels);
	379
	380	if (!force_passive && cfg->active[0]) {
57fbcce3	381	u8 band = NL80211_BAND_2GHZ;
78e28062 EP	382	ret = wl12xx_cmd_build_probe_req(wl, wlvif,
	383	wlvif->role_id, band,
	384	req->ssids[0].ssid,
	385	req->ssids[0].ssid_len,
633e2713 DS	386	ies->ies[band],
	387	ies->len[band],
	388	ies->common_ies,
	389	ies->common_ie_len,
	390	true);
78e28062 EP	391	if (ret < 0) {
	392	wl1271_error("2.4GHz PROBE request template failed");
	393	goto out;
	394	}
	395	}
	396
	397	if (!force_passive && cfg->active[1]) {
57fbcce3	398	u8 band = NL80211_BAND_5GHZ;
78e28062 EP	399	ret = wl12xx_cmd_build_probe_req(wl, wlvif,
	400	wlvif->role_id, band,
	401	req->ssids[0].ssid,
	402	req->ssids[0].ssid_len,
633e2713 DS	403	ies->ies[band],
	404	ies->len[band],
	405	ies->common_ies,
	406	ies->common_ie_len,
	407	true);
78e28062 EP	408	if (ret < 0) {
	409	wl1271_error("5GHz PROBE request template failed");
	410	goto out;
	411	}
	412	}
	413
	414	wl1271_dump(DEBUG_SCAN, "SCAN_CFG: ", cfg, sizeof(*cfg));
	415
	416	ret = wl1271_cmd_send(wl, CMD_CONNECTION_SCAN_CFG, cfg,
	417	sizeof(*cfg), 0);
	418	if (ret < 0) {
	419	wl1271_error("SCAN configuration failed");
	420	goto out;
	421	}
	422	out:
	423	kfree(cfg_channels);
	424	kfree(cfg);
	425	return ret;
	426	}
	427
	428	int wl1271_scan_sched_scan_start(struct wl1271 wl, struct wl12xx_vif wlvif)
	429	{
	430	struct wl1271_cmd_sched_scan_start *start;
	431	int ret = 0;
	432
	433	wl1271_debug(DEBUG_CMD, "cmd periodic scan start");
	434
	435	if (wlvif->bss_type != BSS_TYPE_STA_BSS)
	436	return -EOPNOTSUPP;
	437
	438	if ((wl->quirks & WLCORE_QUIRK_NO_SCHED_SCAN_WHILE_CONN) &&
	439	test_bit(WLVIF_FLAG_IN_USE, &wlvif->flags))
	440	return -EBUSY;
	441
	442	start = kzalloc(sizeof(*start), GFP_KERNEL);
	443	if (!start)
	444	return -ENOMEM;
	445
	446	start->role_id = wlvif->role_id;
	447	start->tag = WL1271_SCAN_DEFAULT_TAG;
	448
	449	ret = wl1271_cmd_send(wl, CMD_START_PERIODIC_SCAN, start,
	450	sizeof(*start), 0);
	451	if (ret < 0) {
	452	wl1271_error("failed to send scan start command");
	453	goto out_free;
	454	}
	455
	456	out_free:
	457	kfree(start);
	458	return ret;
	459	}
	460
	461	int wl12xx_sched_scan_start(struct wl1271 wl, struct wl12xx_vif wlvif,
	462	struct cfg80211_sched_scan_request *req,
633e2713	463	struct ieee80211_scan_ies *ies)
78e28062 EP	464	{
	465	int ret;
	466
	467	ret = wl1271_scan_sched_scan_config(wl, wlvif, req, ies);
	468	if (ret < 0)
	469	return ret;
	470
	471	return wl1271_scan_sched_scan_start(wl, wlvif);
	472	}
	473
	474	void wl12xx_scan_sched_scan_stop(struct wl1271 wl, struct wl12xx_vif wlvif)
	475	{
	476	struct wl1271_cmd_sched_scan_stop *stop;
	477	int ret = 0;
	478
	479	wl1271_debug(DEBUG_CMD, "cmd periodic scan stop");
	480
	481	/* FIXME: what to do if alloc'ing to stop fails? */
	482	stop = kzalloc(sizeof(*stop), GFP_KERNEL);
	483	if (!stop) {
	484	wl1271_error("failed to alloc memory to send sched scan stop");
	485	return;
	486	}
	487
	488	stop->role_id = wlvif->role_id;
	489	stop->tag = WL1271_SCAN_DEFAULT_TAG;
	490
	491	ret = wl1271_cmd_send(wl, CMD_STOP_PERIODIC_SCAN, stop,
	492	sizeof(*stop), 0);
	493	if (ret < 0) {
	494	wl1271_error("failed to send sched scan stop command");
	495	goto out_free;
	496	}
	497
	498	out_free:
	499	kfree(stop);
	500	}
	501
	502	int wl12xx_scan_start(struct wl1271 wl, struct wl12xx_vif wlvif,
	503	struct cfg80211_scan_request *req)
	504	{
	505	wl1271_scan_stm(wl, wlvif);
	506	return 0;
	507	}
	508
	509	void wl12xx_scan_completed(struct wl1271 wl, struct wl12xx_vif wlvif)
	510	{
	511	wl1271_scan_stm(wl, wlvif);
	512	}