2 * This file is part of wl1271
4 * Copyright (C) 2009-2010 Nokia Corporation
6 * Contact: Luciano Coelho <luciano.coelho@nokia.com>
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * version 2 as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
24 #include <linux/ieee80211.h>
34 void wl1271_scan_complete_work(struct work_struct *work)
36 struct delayed_work *dwork;
38 struct wl12xx_vif *wlvif;
41 dwork = container_of(work, struct delayed_work, work);
42 wl = container_of(dwork, struct wl1271, scan_complete_work);
44 wl1271_debug(DEBUG_SCAN, "Scanning complete");
46 mutex_lock(&wl->mutex);
48 if (unlikely(wl->state != WLCORE_STATE_ON))
51 if (wl->scan.state == WL1271_SCAN_STATE_IDLE)
54 wlvif = wl->scan_wlvif;
57 * Rearm the tx watchdog just before idling scan. This
58 * prevents just-finished scans from triggering the watchdog
60 wl12xx_rearm_tx_watchdog_locked(wl);
62 wl->scan.state = WL1271_SCAN_STATE_IDLE;
63 memset(wl->scan.scanned_ch, 0, sizeof(wl->scan.scanned_ch));
65 wl->scan_wlvif = NULL;
67 ret = wl1271_ps_elp_wakeup(wl);
71 if (test_bit(WLVIF_FLAG_STA_ASSOCIATED, &wlvif->flags)) {
72 /* restore hardware connection monitoring template */
73 wl1271_cmd_build_ap_probe_req(wl, wlvif, wlvif->probereq);
76 wl1271_ps_elp_sleep(wl);
78 if (wl->scan.failed) {
79 wl1271_info("Scan completed due to error.");
80 wl12xx_queue_recovery_work(wl);
83 wlcore_cmd_regdomain_config_locked(wl);
85 ieee80211_scan_completed(wl->hw, false);
88 mutex_unlock(&wl->mutex);
92 static void wlcore_started_vifs_iter(void *data, u8 *mac,
93 struct ieee80211_vif *vif)
95 int *count = (int *)data;
97 if (!vif->bss_conf.idle)
101 static int wlcore_count_started_vifs(struct wl1271 *wl)
105 ieee80211_iterate_active_interfaces_atomic(wl->hw,
106 IEEE80211_IFACE_ITER_RESUME_ALL,
107 wlcore_started_vifs_iter, &count);
112 wlcore_scan_get_channels(struct wl1271 *wl,
113 struct ieee80211_channel *req_channels[],
116 struct conn_scan_ch_params *channels,
117 u32 band, bool radar, bool passive,
118 int start, int max_channels,
124 bool force_passive = !n_ssids;
125 u32 min_dwell_time_active, max_dwell_time_active;
126 u32 dwell_time_passive, dwell_time_dfs;
128 /* configure dwell times according to scan type */
129 if (scan_type == SCAN_TYPE_SEARCH) {
130 struct conf_scan_settings *c = &wl->conf.scan;
131 bool active_vif_exists = !!wlcore_count_started_vifs(wl);
133 min_dwell_time_active = active_vif_exists ?
134 c->min_dwell_time_active :
135 c->min_dwell_time_active_long;
136 max_dwell_time_active = active_vif_exists ?
137 c->max_dwell_time_active :
138 c->max_dwell_time_active_long;
139 dwell_time_passive = c->dwell_time_passive;
140 dwell_time_dfs = c->dwell_time_dfs;
142 struct conf_sched_scan_settings *c = &wl->conf.sched_scan;
145 if (band == IEEE80211_BAND_5GHZ)
146 delta_per_probe = c->dwell_time_delta_per_probe_5;
148 delta_per_probe = c->dwell_time_delta_per_probe;
150 min_dwell_time_active = c->base_dwell_time +
151 n_ssids * c->num_probe_reqs * delta_per_probe;
153 max_dwell_time_active = min_dwell_time_active +
154 c->max_dwell_time_delta;
155 dwell_time_passive = c->dwell_time_passive;
156 dwell_time_dfs = c->dwell_time_dfs;
158 min_dwell_time_active = DIV_ROUND_UP(min_dwell_time_active, 1000);
159 max_dwell_time_active = DIV_ROUND_UP(max_dwell_time_active, 1000);
160 dwell_time_passive = DIV_ROUND_UP(dwell_time_passive, 1000);
161 dwell_time_dfs = DIV_ROUND_UP(dwell_time_dfs, 1000);
163 for (i = 0, j = start;
164 i < n_channels && j < max_channels;
166 flags = req_channels[i]->flags;
169 flags |= IEEE80211_CHAN_PASSIVE_SCAN;
171 if ((req_channels[i]->band == band) &&
172 !(flags & IEEE80211_CHAN_DISABLED) &&
173 (!!(flags & IEEE80211_CHAN_RADAR) == radar) &&
174 /* if radar is set, we ignore the passive flag */
176 !!(flags & IEEE80211_CHAN_PASSIVE_SCAN) == passive)) {
179 if (flags & IEEE80211_CHAN_RADAR) {
180 channels[j].flags |= SCAN_CHANNEL_FLAGS_DFS;
182 channels[j].passive_duration =
183 cpu_to_le16(dwell_time_dfs);
185 channels[j].passive_duration =
186 cpu_to_le16(dwell_time_passive);
189 channels[j].min_duration =
190 cpu_to_le16(min_dwell_time_active);
191 channels[j].max_duration =
192 cpu_to_le16(max_dwell_time_active);
194 channels[j].tx_power_att = req_channels[i]->max_power;
195 channels[j].channel = req_channels[i]->hw_value;
198 (band == IEEE80211_BAND_2GHZ) &&
199 (channels[j].channel >= 12) &&
200 (channels[j].channel <= 14) &&
201 (flags & IEEE80211_CHAN_PASSIVE_SCAN) &&
203 /* pactive channels treated as DFS */
204 channels[j].flags = SCAN_CHANNEL_FLAGS_DFS;
207 * n_pactive_ch is counted down from the end of
208 * the passive channel list
211 wl1271_debug(DEBUG_SCAN, "n_pactive_ch = %d",
215 wl1271_debug(DEBUG_SCAN, "freq %d, ch. %d, flags 0x%x, power %d, min/max_dwell %d/%d%s%s",
216 req_channels[i]->center_freq,
217 req_channels[i]->hw_value,
218 req_channels[i]->flags,
219 req_channels[i]->max_power,
220 min_dwell_time_active,
221 max_dwell_time_active,
222 flags & IEEE80211_CHAN_RADAR ?
224 flags & IEEE80211_CHAN_PASSIVE_SCAN ?
234 wlcore_set_scan_chan_params(struct wl1271 *wl,
235 struct wlcore_scan_channels *cfg,
236 struct ieee80211_channel *channels[],
244 wlcore_scan_get_channels(wl,
255 wlcore_scan_get_channels(wl,
267 wlcore_scan_get_channels(wl,
278 wlcore_scan_get_channels(wl,
290 wlcore_scan_get_channels(wl,
297 cfg->passive[1] + cfg->dfs,
302 /* 802.11j channels are not supported yet */
306 cfg->passive_active = n_pactive_ch;
308 wl1271_debug(DEBUG_SCAN, " 2.4GHz: active %d passive %d",
309 cfg->active[0], cfg->passive[0]);
310 wl1271_debug(DEBUG_SCAN, " 5GHz: active %d passive %d",
311 cfg->active[1], cfg->passive[1]);
312 wl1271_debug(DEBUG_SCAN, " DFS: %d", cfg->dfs);
314 return cfg->passive[0] || cfg->active[0] ||
315 cfg->passive[1] || cfg->active[1] || cfg->dfs ||
316 cfg->passive[2] || cfg->active[2];
318 EXPORT_SYMBOL_GPL(wlcore_set_scan_chan_params);
320 int wlcore_scan(struct wl1271 *wl, struct ieee80211_vif *vif,
321 const u8 *ssid, size_t ssid_len,
322 struct cfg80211_scan_request *req)
324 struct wl12xx_vif *wlvif = wl12xx_vif_to_data(vif);
327 * cfg80211 should guarantee that we don't get more channels
328 * than what we have registered.
330 BUG_ON(req->n_channels > WL1271_MAX_CHANNELS);
332 if (wl->scan.state != WL1271_SCAN_STATE_IDLE)
335 wl->scan.state = WL1271_SCAN_STATE_2GHZ_ACTIVE;
337 if (ssid_len && ssid) {
338 wl->scan.ssid_len = ssid_len;
339 memcpy(wl->scan.ssid, ssid, ssid_len);
341 wl->scan.ssid_len = 0;
344 wl->scan_wlvif = wlvif;
346 memset(wl->scan.scanned_ch, 0, sizeof(wl->scan.scanned_ch));
348 /* we assume failure so that timeout scenarios are handled correctly */
349 wl->scan.failed = true;
350 ieee80211_queue_delayed_work(wl->hw, &wl->scan_complete_work,
351 msecs_to_jiffies(WL1271_SCAN_TIMEOUT));
353 wl->ops->scan_start(wl, wlvif, req);
357 /* Returns the scan type to be used or a negative value on error */
359 wlcore_scan_sched_scan_ssid_list(struct wl1271 *wl,
360 struct wl12xx_vif *wlvif,
361 struct cfg80211_sched_scan_request *req)
363 struct wl1271_cmd_sched_scan_ssid_list *cmd = NULL;
364 struct cfg80211_match_set *sets = req->match_sets;
365 struct cfg80211_ssid *ssids = req->ssids;
366 int ret = 0, type, i, j, n_match_ssids = 0;
368 wl1271_debug((DEBUG_CMD | DEBUG_SCAN), "cmd sched scan ssid list");
370 /* count the match sets that contain SSIDs */
371 for (i = 0; i < req->n_match_sets; i++)
372 if (sets[i].ssid.ssid_len > 0)
375 /* No filter, no ssids or only bcast ssid */
376 if (!n_match_ssids &&
378 (req->n_ssids == 1 && req->ssids[0].ssid_len == 0))) {
379 type = SCAN_SSID_FILTER_ANY;
383 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
389 cmd->role_id = wlvif->role_id;
390 if (!n_match_ssids) {
391 /* No filter, with ssids */
392 type = SCAN_SSID_FILTER_DISABLED;
394 for (i = 0; i < req->n_ssids; i++) {
395 cmd->ssids[cmd->n_ssids].type = (ssids[i].ssid_len) ?
396 SCAN_SSID_TYPE_HIDDEN : SCAN_SSID_TYPE_PUBLIC;
397 cmd->ssids[cmd->n_ssids].len = ssids[i].ssid_len;
398 memcpy(cmd->ssids[cmd->n_ssids].ssid, ssids[i].ssid,
403 type = SCAN_SSID_FILTER_LIST;
405 /* Add all SSIDs from the filters */
406 for (i = 0; i < req->n_match_sets; i++) {
407 /* ignore sets without SSIDs */
408 if (!sets[i].ssid.ssid_len)
411 cmd->ssids[cmd->n_ssids].type = SCAN_SSID_TYPE_PUBLIC;
412 cmd->ssids[cmd->n_ssids].len = sets[i].ssid.ssid_len;
413 memcpy(cmd->ssids[cmd->n_ssids].ssid,
414 sets[i].ssid.ssid, sets[i].ssid.ssid_len);
417 if ((req->n_ssids > 1) ||
418 (req->n_ssids == 1 && req->ssids[0].ssid_len > 0)) {
420 * Mark all the SSIDs passed in the SSID list as HIDDEN,
421 * so they're used in probe requests.
423 for (i = 0; i < req->n_ssids; i++) {
424 if (!req->ssids[i].ssid_len)
427 for (j = 0; j < cmd->n_ssids; j++)
428 if ((req->ssids[i].ssid_len ==
429 cmd->ssids[j].len) &&
430 !memcmp(req->ssids[i].ssid,
432 req->ssids[i].ssid_len)) {
434 SCAN_SSID_TYPE_HIDDEN;
437 /* Fail if SSID isn't present in the filters */
438 if (j == cmd->n_ssids) {
446 ret = wl1271_cmd_send(wl, CMD_CONNECTION_SCAN_SSID_CFG, cmd,
449 wl1271_error("cmd sched scan ssid list failed");
460 EXPORT_SYMBOL_GPL(wlcore_scan_sched_scan_ssid_list);
462 void wlcore_scan_sched_scan_results(struct wl1271 *wl)
464 wl1271_debug(DEBUG_SCAN, "got periodic scan results");
466 ieee80211_sched_scan_results(wl->hw);
468 EXPORT_SYMBOL_GPL(wlcore_scan_sched_scan_results);