1 files changed, 488 insertions, 0 deletions

diff --git a/drivers/net/wireless/ti/wlcore/scan.c b/drivers/net/wireless/ti/wlcore/scan.c
new file mode 100644
index 00000000000..1e3d51cd673
--- /dev/null
+++ b/drivers/net/wireless/ti/wlcore/scan.c
@@ -0,0 +1,488 @@
+/*
+ * This file is part of wl1271
+ *
+ * Copyright (C) 2009-2010 Nokia Corporation
+ *
+ * Contact: Luciano Coelho <luciano.coelho@nokia.com>
+ *
+ * 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 "wlcore.h"
+#include "debug.h"
+#include "cmd.h"
+#include "scan.h"
+#include "acx.h"
+#include "ps.h"
+#include "tx.h"
+
+void wl1271_scan_complete_work(struct work_struct *work)
+{
+	struct delayed_work *dwork;
+	struct wl1271 *wl;
+	struct wl12xx_vif *wlvif;
+	int ret;
+
+	dwork = container_of(work, struct delayed_work, work);
+	wl = container_of(dwork, struct wl1271, scan_complete_work);
+
+	wl1271_debug(DEBUG_SCAN, "Scanning complete");
+
+	mutex_lock(&wl->mutex);
+
+	if (unlikely(wl->state != WLCORE_STATE_ON))
+		goto out;
+
+	if (wl->scan.state == WL1271_SCAN_STATE_IDLE)
+		goto out;
+
+	wlvif = wl->scan_wlvif;
+
+	/*
+	 * Rearm the tx watchdog just before idling scan. This
+	 * prevents just-finished scans from triggering the watchdog
+	 */
+	wl12xx_rearm_tx_watchdog_locked(wl);
+
+	wl->scan.state = WL1271_SCAN_STATE_IDLE;
+	memset(wl->scan.scanned_ch, 0, sizeof(wl->scan.scanned_ch));
+	wl->scan.req = NULL;
+	wl->scan_wlvif = NULL;
+
+	ret = wl1271_ps_elp_wakeup(wl);
+	if (ret < 0)
+		goto out;
+
+	if (test_bit(WLVIF_FLAG_STA_ASSOCIATED, &wlvif->flags)) {
+		/* restore hardware connection monitoring template */
+		wl1271_cmd_build_ap_probe_req(wl, wlvif, wlvif->probereq);
+	}
+
+	wl1271_ps_elp_sleep(wl);
+
+	if (wl->scan.failed) {
+		wl1271_info("Scan completed due to error.");
+		wl12xx_queue_recovery_work(wl);
+	}
+
+	wlcore_cmd_regdomain_config_locked(wl);
+
+	ieee80211_scan_completed(wl->hw, false);
+
+out:
+	mutex_unlock(&wl->mutex);
+
+}
+
+static void wlcore_started_vifs_iter(void *data, u8 *mac,
+				     struct ieee80211_vif *vif)
+{
+	struct wl12xx_vif *wlvif = wl12xx_vif_to_data(vif);
+	bool active = false;
+	int *count = (int *)data;
+
+	/*
+	 * count active interfaces according to interface type.
+	 * checking only bss_conf.idle is bad for some cases, e.g.
+	 * we don't want to count sta in p2p_find as active interface.
+	 */
+	switch (wlvif->bss_type) {
+	case BSS_TYPE_STA_BSS:
+		if (test_bit(WLVIF_FLAG_STA_ASSOCIATED, &wlvif->flags))
+			active = true;
+		break;
+
+	case BSS_TYPE_AP_BSS:
+		if (wlvif->wl->active_sta_count > 0)
+			active = true;
+		break;
+
+	default:
+		break;
+	}
+
+	if (active)
+		(*count)++;
+}
+
+static int wlcore_count_started_vifs(struct wl1271 *wl)
+{
+	int count = 0;
+
+	ieee80211_iterate_active_interfaces_atomic(wl->hw,
+					IEEE80211_IFACE_ITER_RESUME_ALL,
+					wlcore_started_vifs_iter, &count);
+	return count;
+}
+
+static int
+wlcore_scan_get_channels(struct wl1271 *wl,
+			 struct ieee80211_channel *req_channels[],
+			 u32 n_channels,
+			 u32 n_ssids,
+			 struct conn_scan_ch_params *channels,
+			 u32 band, bool radar, bool passive,
+			 int start, int max_channels,
+			 u8 *n_pactive_ch,
+			 int scan_type)
+{
+	int i, j;
+	u32 flags;
+	bool force_passive = !n_ssids;
+	u32 min_dwell_time_active, max_dwell_time_active;
+	u32 dwell_time_passive, dwell_time_dfs;
+
+	/* configure dwell times according to scan type */
+	if (scan_type == SCAN_TYPE_SEARCH) {
+		struct conf_scan_settings *c = &wl->conf.scan;
+		bool active_vif_exists = !!wlcore_count_started_vifs(wl);
+
+		min_dwell_time_active = active_vif_exists ?
+			c->min_dwell_time_active :
+			c->min_dwell_time_active_long;
+		max_dwell_time_active = active_vif_exists ?
+			c->max_dwell_time_active :
+			c->max_dwell_time_active_long;
+		dwell_time_passive = c->dwell_time_passive;
+		dwell_time_dfs = c->dwell_time_dfs;
+	} else {
+		struct conf_sched_scan_settings *c = &wl->conf.sched_scan;
+		u32 delta_per_probe;
+
+		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 +
+			 n_ssids * c->num_probe_reqs * delta_per_probe;
+
+		max_dwell_time_active = min_dwell_time_active +
+					c->max_dwell_time_delta;
+		dwell_time_passive = c->dwell_time_passive;
+		dwell_time_dfs = c->dwell_time_dfs;
+	}
+	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(dwell_time_passive, 1000);
+	dwell_time_dfs = DIV_ROUND_UP(dwell_time_dfs, 1000);
+
+	for (i = 0, j = start;
+	     i < n_channels && j < max_channels;
+	     i++) {
+		flags = req_channels[i]->flags;
+
+		if (force_passive)
+			flags |= IEEE80211_CHAN_NO_IR;
+
+		if ((req_channels[i]->band == band) &&
+		    !(flags & IEEE80211_CHAN_DISABLED) &&
+		    (!!(flags & IEEE80211_CHAN_RADAR) == radar) &&
+		    /* if radar is set, we ignore the passive flag */
+		    (radar ||
+		     !!(flags & IEEE80211_CHAN_NO_IR) == passive)) {
+			if (flags & IEEE80211_CHAN_RADAR) {
+				channels[j].flags |= SCAN_CHANNEL_FLAGS_DFS;
+
+				channels[j].passive_duration =
+					cpu_to_le16(dwell_time_dfs);
+			} else {
+				channels[j].passive_duration =
+					cpu_to_le16(dwell_time_passive);
+			}
+
+			channels[j].min_duration =
+				cpu_to_le16(min_dwell_time_active);
+			channels[j].max_duration =
+				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;
+
+			if (n_pactive_ch &&
+			    (band == IEEE80211_BAND_2GHZ) &&
+			    (channels[j].channel >= 12) &&
+			    (channels[j].channel <= 14) &&
+			    (flags & IEEE80211_CHAN_NO_IR) &&
+			    !force_passive) {
+				/* pactive channels treated as DFS */
+				channels[j].flags = SCAN_CHANNEL_FLAGS_DFS;
+
+				/*
+				 * n_pactive_ch is counted down from the end of
+				 * the passive channel list
+				 */
+				(*n_pactive_ch)++;
+				wl1271_debug(DEBUG_SCAN, "n_pactive_ch = %d",
+					     *n_pactive_ch);
+			}
+
+			wl1271_debug(DEBUG_SCAN, "freq %d, ch. %d, flags 0x%x, power %d, min/max_dwell %d/%d%s%s",
+				     req_channels[i]->center_freq,
+				     req_channels[i]->hw_value,
+				     req_channels[i]->flags,
+				     req_channels[i]->max_power,
+				     min_dwell_time_active,
+				     max_dwell_time_active,
+				     flags & IEEE80211_CHAN_RADAR ?
+					", DFS" : "",
+				     flags & IEEE80211_CHAN_NO_IR ?
+					", NO-IR" : "");
+			j++;
+		}
+	}
+
+	return j - start;
+}
+
+bool
+wlcore_set_scan_chan_params(struct wl1271 *wl,
+			    struct wlcore_scan_channels *cfg,
+			    struct ieee80211_channel *channels[],
+			    u32 n_channels,
+			    u32 n_ssids,
+			    int scan_type)
+{
+	u8 n_pactive_ch = 0;
+
+	cfg->passive[0] =
+		wlcore_scan_get_channels(wl,
+					 channels,
+					 n_channels,
+					 n_ssids,
+					 cfg->channels_2,
+					 IEEE80211_BAND_2GHZ,
+					 false, true, 0,
+					 MAX_CHANNELS_2GHZ,
+					 &n_pactive_ch,
+					 scan_type);
+	cfg->active[0] =
+		wlcore_scan_get_channels(wl,
+					 channels,
+					 n_channels,
+					 n_ssids,
+					 cfg->channels_2,
+					 IEEE80211_BAND_2GHZ,
+					 false, false,
+					 cfg->passive[0],
+					 MAX_CHANNELS_2GHZ,
+					 &n_pactive_ch,
+					 scan_type);
+	cfg->passive[1] =
+		wlcore_scan_get_channels(wl,
+					 channels,
+					 n_channels,
+					 n_ssids,
+					 cfg->channels_5,
+					 IEEE80211_BAND_5GHZ,
+					 false, true, 0,
+					 wl->max_channels_5,
+					 &n_pactive_ch,
+					 scan_type);
+	cfg->dfs =
+		wlcore_scan_get_channels(wl,
+					 channels,
+					 n_channels,
+					 n_ssids,
+					 cfg->channels_5,
+					 IEEE80211_BAND_5GHZ,
+					 true, true,
+					 cfg->passive[1],
+					 wl->max_channels_5,
+					 &n_pactive_ch,
+					 scan_type);
+	cfg->active[1] =
+		wlcore_scan_get_channels(wl,
+					 channels,
+					 n_channels,
+					 n_ssids,
+					 cfg->channels_5,
+					 IEEE80211_BAND_5GHZ,
+					 false, false,
+					 cfg->passive[1] + cfg->dfs,
+					 wl->max_channels_5,
+					 &n_pactive_ch,
+					 scan_type);
+
+	/* 802.11j channels are not supported yet */
+	cfg->passive[2] = 0;
+	cfg->active[2] = 0;
+
+	cfg->passive_active = n_pactive_ch;
+
+	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]);
+	wl1271_debug(DEBUG_SCAN, "    DFS: %d", cfg->dfs);
+
+	return  cfg->passive[0] || cfg->active[0] ||
+		cfg->passive[1] || cfg->active[1] || cfg->dfs ||
+		cfg->passive[2] || cfg->active[2];
+}
+EXPORT_SYMBOL_GPL(wlcore_set_scan_chan_params);
+
+int wlcore_scan(struct wl1271 *wl, struct ieee80211_vif *vif,
+		const u8 *ssid, size_t ssid_len,
+		struct cfg80211_scan_request *req)
+{
+	struct wl12xx_vif *wlvif = wl12xx_vif_to_data(vif);
+
+	/*
+	 * cfg80211 should guarantee that we don't get more channels
+	 * than what we have registered.
+	 */
+	BUG_ON(req->n_channels > WL1271_MAX_CHANNELS);
+
+	if (wl->scan.state != WL1271_SCAN_STATE_IDLE)
+		return -EBUSY;
+
+	wl->scan.state = WL1271_SCAN_STATE_2GHZ_ACTIVE;
+
+	if (ssid_len && ssid) {
+		wl->scan.ssid_len = ssid_len;
+		memcpy(wl->scan.ssid, ssid, ssid_len);
+	} else {
+		wl->scan.ssid_len = 0;
+	}
+
+	wl->scan_wlvif = wlvif;
+	wl->scan.req = req;
+	memset(wl->scan.scanned_ch, 0, sizeof(wl->scan.scanned_ch));
+
+	/* we assume failure so that timeout scenarios are handled correctly */
+	wl->scan.failed = true;
+	ieee80211_queue_delayed_work(wl->hw, &wl->scan_complete_work,
+				     msecs_to_jiffies(WL1271_SCAN_TIMEOUT));
+
+	wl->ops->scan_start(wl, wlvif, req);
+
+	return 0;
+}
+/* Returns the scan type to be used or a negative value on error */
+int
+wlcore_scan_sched_scan_ssid_list(struct wl1271 *wl,
+				 struct wl12xx_vif *wlvif,
+				 struct cfg80211_sched_scan_request *req)
+{
+	struct wl1271_cmd_sched_scan_ssid_list *cmd = NULL;
+	struct cfg80211_match_set *sets = req->match_sets;
+	struct cfg80211_ssid *ssids = req->ssids;
+	int ret = 0, type, i, j, n_match_ssids = 0;
+
+	wl1271_debug((DEBUG_CMD | DEBUG_SCAN), "cmd sched scan ssid list");
+
+	/* count the match sets that contain SSIDs */
+	for (i = 0; i < req->n_match_sets; i++)
+		if (sets[i].ssid.ssid_len > 0)
+			n_match_ssids++;
+
+	/* No filter, no ssids or only bcast ssid */
+	if (!n_match_ssids &&
+	    (!req->n_ssids ||
+	     (req->n_ssids == 1 && req->ssids[0].ssid_len == 0))) {
+		type = SCAN_SSID_FILTER_ANY;
+		goto out;
+	}
+
+	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+	if (!cmd) {
+		ret = -ENOMEM;
+		goto out;
+	}
+
+	cmd->role_id = wlvif->role_id;
+	if (!n_match_ssids) {
+		/* No filter, with ssids */
+		type = SCAN_SSID_FILTER_DISABLED;
+
+		for (i = 0; i < req->n_ssids; i++) {
+			cmd->ssids[cmd->n_ssids].type = (ssids[i].ssid_len) ?
+				SCAN_SSID_TYPE_HIDDEN : SCAN_SSID_TYPE_PUBLIC;
+			cmd->ssids[cmd->n_ssids].len = ssids[i].ssid_len;
+			memcpy(cmd->ssids[cmd->n_ssids].ssid, ssids[i].ssid,
+			       ssids[i].ssid_len);
+			cmd->n_ssids++;
+		}
+	} else {
+		type = SCAN_SSID_FILTER_LIST;
+
+		/* Add all SSIDs from the filters */
+		for (i = 0; i < req->n_match_sets; i++) {
+			/* ignore sets without SSIDs */
+			if (!sets[i].ssid.ssid_len)
+				continue;
+
+			cmd->ssids[cmd->n_ssids].type = SCAN_SSID_TYPE_PUBLIC;
+			cmd->ssids[cmd->n_ssids].len = sets[i].ssid.ssid_len;
+			memcpy(cmd->ssids[cmd->n_ssids].ssid,
+			       sets[i].ssid.ssid, sets[i].ssid.ssid_len);
+			cmd->n_ssids++;
+		}
+		if ((req->n_ssids > 1) ||
+		    (req->n_ssids == 1 && req->ssids[0].ssid_len > 0)) {
+			/*
+			 * Mark all the SSIDs passed in the SSID list as HIDDEN,
+			 * so they're used in probe requests.
+			 */
+			for (i = 0; i < req->n_ssids; i++) {
+				if (!req->ssids[i].ssid_len)
+					continue;
+
+				for (j = 0; j < cmd->n_ssids; j++)
+					if ((req->ssids[i].ssid_len ==
+					     cmd->ssids[j].len) &&
+					    !memcmp(req->ssids[i].ssid,
+						   cmd->ssids[j].ssid,
+						   req->ssids[i].ssid_len)) {
+						cmd->ssids[j].type =
+							SCAN_SSID_TYPE_HIDDEN;
+						break;
+					}
+				/* Fail if SSID isn't present in the filters */
+				if (j == cmd->n_ssids) {
+					ret = -EINVAL;
+					goto out_free;
+				}
+			}
+		}
+	}
+
+	ret = wl1271_cmd_send(wl, CMD_CONNECTION_SCAN_SSID_CFG, cmd,
+			      sizeof(*cmd), 0);
+	if (ret < 0) {
+		wl1271_error("cmd sched scan ssid list failed");
+		goto out_free;
+	}
+
+out_free:
+	kfree(cmd);
+out:
+	if (ret < 0)
+		return ret;
+	return type;
+}
+EXPORT_SYMBOL_GPL(wlcore_scan_sched_scan_ssid_list);
+
+void wlcore_scan_sched_scan_results(struct wl1271 *wl)
+{
+	wl1271_debug(DEBUG_SCAN, "got periodic scan results");
+
+	ieee80211_sched_scan_results(wl->hw);
+}
+EXPORT_SYMBOL_GPL(wlcore_scan_sched_scan_results);