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>
32 void wl1271_scan_complete_work(struct work_struct *work)
34 struct delayed_work *dwork;
37 dwork = container_of(work, struct delayed_work, work);
38 wl = container_of(dwork, struct wl1271, scan_complete_work);
40 wl1271_debug(DEBUG_SCAN, "Scanning complete");
42 mutex_lock(&wl->mutex);
44 if (wl->state == WL1271_STATE_OFF)
47 if (wl->scan.state == WL1271_SCAN_STATE_IDLE)
50 wl->scan.state = WL1271_SCAN_STATE_IDLE;
51 memset(wl->scan.scanned_ch, 0, sizeof(wl->scan.scanned_ch));
53 ieee80211_scan_completed(wl->hw, false);
55 /* restore hardware connection monitoring template */
56 if (test_bit(WL1271_FLAG_STA_ASSOCIATED, &wl->flags)) {
57 if (wl1271_ps_elp_wakeup(wl) == 0) {
58 wl1271_cmd_build_ap_probe_req(wl, wl->probereq);
59 wl1271_ps_elp_sleep(wl);
63 if (wl->scan.failed) {
64 wl1271_info("Scan completed due to error.");
65 ieee80211_queue_work(wl->hw, &wl->recovery_work);
69 mutex_unlock(&wl->mutex);
74 static int wl1271_get_scan_channels(struct wl1271 *wl,
75 struct cfg80211_scan_request *req,
76 struct basic_scan_channel_params *channels,
77 enum ieee80211_band band, bool passive)
79 struct conf_scan_settings *c = &wl->conf.scan;
84 i < req->n_channels && j < WL1271_SCAN_MAX_CHANNELS;
87 flags = req->channels[i]->flags;
89 if (!test_bit(i, wl->scan.scanned_ch) &&
90 !(flags & IEEE80211_CHAN_DISABLED) &&
91 ((!!(flags & IEEE80211_CHAN_PASSIVE_SCAN)) == passive) &&
92 (req->channels[i]->band == band)) {
94 wl1271_debug(DEBUG_SCAN, "band %d, center_freq %d ",
95 req->channels[i]->band,
96 req->channels[i]->center_freq);
97 wl1271_debug(DEBUG_SCAN, "hw_value %d, flags %X",
98 req->channels[i]->hw_value,
99 req->channels[i]->flags);
100 wl1271_debug(DEBUG_SCAN,
101 "max_antenna_gain %d, max_power %d",
102 req->channels[i]->max_antenna_gain,
103 req->channels[i]->max_power);
104 wl1271_debug(DEBUG_SCAN, "beacon_found %d",
105 req->channels[i]->beacon_found);
108 channels[j].min_duration =
109 cpu_to_le32(c->min_dwell_time_active);
110 channels[j].max_duration =
111 cpu_to_le32(c->max_dwell_time_active);
113 channels[j].min_duration =
114 cpu_to_le32(c->min_dwell_time_passive);
115 channels[j].max_duration =
116 cpu_to_le32(c->max_dwell_time_passive);
118 channels[j].early_termination = 0;
119 channels[j].tx_power_att = req->channels[i]->max_power;
120 channels[j].channel = req->channels[i]->hw_value;
122 memset(&channels[j].bssid_lsb, 0xff, 4);
123 memset(&channels[j].bssid_msb, 0xff, 2);
125 /* Mark the channels we already used */
126 set_bit(i, wl->scan.scanned_ch);
135 #define WL1271_NOTHING_TO_SCAN 1
137 static int wl1271_scan_send(struct wl1271 *wl, enum ieee80211_band band,
138 bool passive, u32 basic_rate)
140 struct wl1271_cmd_scan *cmd;
141 struct wl1271_cmd_trigger_scan_to *trigger;
143 u16 scan_options = 0;
145 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
146 trigger = kzalloc(sizeof(*trigger), GFP_KERNEL);
147 if (!cmd || !trigger) {
152 /* We always use high priority scans */
153 scan_options = WL1271_SCAN_OPT_PRIORITY_HIGH;
155 /* No SSIDs means that we have a forced passive scan */
156 if (passive || wl->scan.req->n_ssids == 0)
157 scan_options |= WL1271_SCAN_OPT_PASSIVE;
159 cmd->params.scan_options = cpu_to_le16(scan_options);
161 cmd->params.n_ch = wl1271_get_scan_channels(wl, wl->scan.req,
164 if (cmd->params.n_ch == 0) {
165 ret = WL1271_NOTHING_TO_SCAN;
169 cmd->params.tx_rate = cpu_to_le32(basic_rate);
170 cmd->params.rx_config_options = cpu_to_le32(CFG_RX_ALL_GOOD);
171 cmd->params.rx_filter_options =
172 cpu_to_le32(CFG_RX_PRSP_EN | CFG_RX_MGMT_EN | CFG_RX_BCN_EN);
174 cmd->params.n_probe_reqs = wl->conf.scan.num_probe_reqs;
175 cmd->params.tx_rate = cpu_to_le32(basic_rate);
176 cmd->params.tid_trigger = 0;
177 cmd->params.scan_tag = WL1271_SCAN_DEFAULT_TAG;
179 if (band == IEEE80211_BAND_2GHZ)
180 cmd->params.band = WL1271_SCAN_BAND_2_4_GHZ;
182 cmd->params.band = WL1271_SCAN_BAND_5_GHZ;
184 if (wl->scan.ssid_len && wl->scan.ssid) {
185 cmd->params.ssid_len = wl->scan.ssid_len;
186 memcpy(cmd->params.ssid, wl->scan.ssid, wl->scan.ssid_len);
189 ret = wl1271_cmd_build_probe_req(wl, wl->scan.ssid, wl->scan.ssid_len,
190 wl->scan.req->ie, wl->scan.req->ie_len,
193 wl1271_error("PROBE request template failed");
197 /* disable the timeout */
198 trigger->timeout = 0;
199 ret = wl1271_cmd_send(wl, CMD_TRIGGER_SCAN_TO, trigger,
200 sizeof(*trigger), 0);
202 wl1271_error("trigger scan to failed for hw scan");
206 wl1271_dump(DEBUG_SCAN, "SCAN: ", cmd, sizeof(*cmd));
208 ret = wl1271_cmd_send(wl, CMD_SCAN, cmd, sizeof(*cmd), 0);
210 wl1271_error("SCAN failed");
220 void wl1271_scan_stm(struct wl1271 *wl)
224 switch (wl->scan.state) {
225 case WL1271_SCAN_STATE_IDLE:
228 case WL1271_SCAN_STATE_2GHZ_ACTIVE:
229 ret = wl1271_scan_send(wl, IEEE80211_BAND_2GHZ, false,
230 wl->conf.tx.basic_rate);
231 if (ret == WL1271_NOTHING_TO_SCAN) {
232 wl->scan.state = WL1271_SCAN_STATE_2GHZ_PASSIVE;
238 case WL1271_SCAN_STATE_2GHZ_PASSIVE:
239 ret = wl1271_scan_send(wl, IEEE80211_BAND_2GHZ, true,
240 wl->conf.tx.basic_rate);
241 if (ret == WL1271_NOTHING_TO_SCAN) {
243 wl->scan.state = WL1271_SCAN_STATE_5GHZ_ACTIVE;
245 wl->scan.state = WL1271_SCAN_STATE_DONE;
251 case WL1271_SCAN_STATE_5GHZ_ACTIVE:
252 ret = wl1271_scan_send(wl, IEEE80211_BAND_5GHZ, false,
253 wl->conf.tx.basic_rate_5);
254 if (ret == WL1271_NOTHING_TO_SCAN) {
255 wl->scan.state = WL1271_SCAN_STATE_5GHZ_PASSIVE;
261 case WL1271_SCAN_STATE_5GHZ_PASSIVE:
262 ret = wl1271_scan_send(wl, IEEE80211_BAND_5GHZ, true,
263 wl->conf.tx.basic_rate_5);
264 if (ret == WL1271_NOTHING_TO_SCAN) {
265 wl->scan.state = WL1271_SCAN_STATE_DONE;
271 case WL1271_SCAN_STATE_DONE:
272 wl->scan.failed = false;
273 cancel_delayed_work(&wl->scan_complete_work);
274 ieee80211_queue_delayed_work(wl->hw, &wl->scan_complete_work,
275 msecs_to_jiffies(0));
279 wl1271_error("invalid scan state");
284 cancel_delayed_work(&wl->scan_complete_work);
285 ieee80211_queue_delayed_work(wl->hw, &wl->scan_complete_work,
286 msecs_to_jiffies(0));
290 int wl1271_scan(struct wl1271 *wl, const u8 *ssid, size_t ssid_len,
291 struct cfg80211_scan_request *req)
294 * cfg80211 should guarantee that we don't get more channels
295 * than what we have registered.
297 BUG_ON(req->n_channels > WL1271_MAX_CHANNELS);
299 if (wl->scan.state != WL1271_SCAN_STATE_IDLE)
302 wl->scan.state = WL1271_SCAN_STATE_2GHZ_ACTIVE;
304 if (ssid_len && ssid) {
305 wl->scan.ssid_len = ssid_len;
306 memcpy(wl->scan.ssid, ssid, ssid_len);
308 wl->scan.ssid_len = 0;
312 memset(wl->scan.scanned_ch, 0, sizeof(wl->scan.scanned_ch));
314 /* we assume failure so that timeout scenarios are handled correctly */
315 wl->scan.failed = true;
316 ieee80211_queue_delayed_work(wl->hw, &wl->scan_complete_work,
317 msecs_to_jiffies(WL1271_SCAN_TIMEOUT));
325 wl1271_scan_get_sched_scan_channels(struct wl1271 *wl,
326 struct cfg80211_sched_scan_request *req,
327 struct conn_scan_ch_params *channels,
328 u32 band, bool radar, bool passive,
331 struct conf_sched_scan_settings *c = &wl->conf.sched_scan;
335 for (i = 0, j = start;
336 i < req->n_channels && j < MAX_CHANNELS_ALL_BANDS;
338 flags = req->channels[i]->flags;
340 if ((req->channels[i]->band == band) &&
341 !(flags & IEEE80211_CHAN_DISABLED) &&
342 (!!(flags & IEEE80211_CHAN_RADAR) == radar) &&
343 /* if radar is set, we ignore the passive flag */
345 !!(flags & IEEE80211_CHAN_PASSIVE_SCAN) == passive)) {
346 wl1271_debug(DEBUG_SCAN, "band %d, center_freq %d ",
347 req->channels[i]->band,
348 req->channels[i]->center_freq);
349 wl1271_debug(DEBUG_SCAN, "hw_value %d, flags %X",
350 req->channels[i]->hw_value,
351 req->channels[i]->flags);
352 wl1271_debug(DEBUG_SCAN, "max_power %d",
353 req->channels[i]->max_power);
355 if (flags & IEEE80211_CHAN_RADAR) {
356 channels[j].flags |= SCAN_CHANNEL_FLAGS_DFS;
357 channels[j].passive_duration =
358 cpu_to_le16(c->dwell_time_dfs);
360 else if (flags & IEEE80211_CHAN_PASSIVE_SCAN) {
361 channels[j].passive_duration =
362 cpu_to_le16(c->dwell_time_passive);
364 channels[j].min_duration =
365 cpu_to_le16(c->min_dwell_time_active);
366 channels[j].max_duration =
367 cpu_to_le16(c->max_dwell_time_active);
369 channels[j].tx_power_att = req->channels[i]->max_power;
370 channels[j].channel = req->channels[i]->hw_value;
380 wl1271_scan_sched_scan_channels(struct wl1271 *wl,
381 struct cfg80211_sched_scan_request *req,
382 struct wl1271_cmd_sched_scan_config *cfg)
387 wl1271_scan_get_sched_scan_channels(wl, req, cfg->channels,
390 idx += cfg->passive[0];
393 wl1271_scan_get_sched_scan_channels(wl, req, cfg->channels,
397 * 5GHz channels always start at position 14, not immediately
398 * after the last 2.4GHz channel
403 wl1271_scan_get_sched_scan_channels(wl, req, cfg->channels,
406 idx += cfg->passive[1];
409 wl1271_scan_get_sched_scan_channels(wl, req, cfg->channels,
415 wl1271_scan_get_sched_scan_channels(wl, req, cfg->channels,
418 idx += cfg->active[1];
420 wl1271_debug(DEBUG_SCAN, " 2.4GHz: active %d passive %d",
421 cfg->active[0], cfg->passive[0]);
422 wl1271_debug(DEBUG_SCAN, " 5GHz: active %d passive %d",
423 cfg->active[1], cfg->passive[1]);
424 wl1271_debug(DEBUG_SCAN, " DFS: %d", cfg->dfs);
429 int wl1271_scan_sched_scan_config(struct wl1271 *wl,
430 struct cfg80211_sched_scan_request *req,
431 struct ieee80211_sched_scan_ies *ies)
433 struct wl1271_cmd_sched_scan_config *cfg = NULL;
434 struct conf_sched_scan_settings *c = &wl->conf.sched_scan;
435 int i, total_channels, ret;
437 wl1271_debug(DEBUG_CMD, "cmd sched_scan scan config");
439 cfg = kzalloc(sizeof(*cfg), GFP_KERNEL);
443 cfg->rssi_threshold = c->rssi_threshold;
444 cfg->snr_threshold = c->snr_threshold;
445 cfg->n_probe_reqs = c->num_probe_reqs;
446 /* cycles set to 0 it means infinite (until manually stopped) */
448 /* report APs when at least 1 is found */
449 cfg->report_after = 1;
450 /* don't stop scanning automatically when something is found */
452 cfg->tag = WL1271_SCAN_DEFAULT_TAG;
453 /* don't filter on BSS type */
454 cfg->bss_type = SCAN_BSS_TYPE_ANY;
455 /* currently NL80211 supports only a single interval */
456 for (i = 0; i < SCAN_MAX_CYCLE_INTERVALS; i++)
457 cfg->intervals[i] = cpu_to_le32(req->interval);
459 if (req->ssids[0].ssid_len && req->ssids[0].ssid) {
460 cfg->filter_type = SCAN_SSID_FILTER_SPECIFIC;
461 cfg->ssid_len = req->ssids[0].ssid_len;
462 memcpy(cfg->ssid, req->ssids[0].ssid,
463 req->ssids[0].ssid_len);
465 cfg->filter_type = SCAN_SSID_FILTER_ANY;
469 total_channels = wl1271_scan_sched_scan_channels(wl, req, cfg);
470 if (total_channels == 0) {
471 wl1271_error("scan channel list is empty");
476 if (cfg->active[0]) {
477 ret = wl1271_cmd_build_probe_req(wl, req->ssids[0].ssid,
478 req->ssids[0].ssid_len,
479 ies->ie[IEEE80211_BAND_2GHZ],
480 ies->len[IEEE80211_BAND_2GHZ],
481 IEEE80211_BAND_2GHZ);
483 wl1271_error("2.4GHz PROBE request template failed");
488 if (cfg->active[1]) {
489 ret = wl1271_cmd_build_probe_req(wl, req->ssids[0].ssid,
490 req->ssids[0].ssid_len,
491 ies->ie[IEEE80211_BAND_5GHZ],
492 ies->len[IEEE80211_BAND_5GHZ],
493 IEEE80211_BAND_5GHZ);
495 wl1271_error("5GHz PROBE request template failed");
500 wl1271_dump(DEBUG_SCAN, "SCAN_CFG: ", cfg, sizeof(*cfg));
502 ret = wl1271_cmd_send(wl, CMD_CONNECTION_SCAN_CFG, cfg,
505 wl1271_error("SCAN configuration failed");
513 int wl1271_scan_sched_scan_start(struct wl1271 *wl)
515 struct wl1271_cmd_sched_scan_start *start;
518 wl1271_debug(DEBUG_CMD, "cmd periodic scan start");
520 if (wl->bss_type != BSS_TYPE_STA_BSS)
523 if (!test_bit(WL1271_FLAG_IDLE, &wl->flags))
526 start = kzalloc(sizeof(*start), GFP_KERNEL);
530 start->tag = WL1271_SCAN_DEFAULT_TAG;
532 ret = wl1271_cmd_send(wl, CMD_START_PERIODIC_SCAN, start,
535 wl1271_error("failed to send scan start command");
544 void wl1271_scan_sched_scan_results(struct wl1271 *wl)
546 wl1271_debug(DEBUG_SCAN, "got periodic scan results");
548 ieee80211_sched_scan_results(wl->hw);
551 void wl1271_scan_sched_scan_stop(struct wl1271 *wl)
553 struct wl1271_cmd_sched_scan_stop *stop;
556 wl1271_debug(DEBUG_CMD, "cmd periodic scan stop");
558 /* FIXME: what to do if alloc'ing to stop fails? */
559 stop = kzalloc(sizeof(*stop), GFP_KERNEL);
561 wl1271_error("failed to alloc memory to send sched scan stop");
565 stop->tag = WL1271_SCAN_DEFAULT_TAG;
567 ret = wl1271_cmd_send(wl, CMD_STOP_PERIODIC_SCAN, stop,
570 wl1271_error("failed to send sched scan stop command");
573 wl->sched_scanning = false;