summaryrefslogtreecommitdiffstats
path: root/drivers/net/wireless/ti/wl18xx/scan.c
blob: 98666f235a12d9a70873e18eaa3245298007284f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
/*
 * This file is part of wl18xx
 *
 * 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"

static void wl18xx_adjust_channels(struct wl18xx_cmd_scan_params *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->passive_active = 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 */
}

static int wl18xx_scan_send(struct wl1271 *wl, struct wl12xx_vif *wlvif,
			    struct cfg80211_scan_request *req)
{
	struct wl18xx_cmd_scan_params *cmd;
	struct wlcore_scan_channels *cmd_channels = NULL;
	int ret;

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

	cmd->role_id = wlvif->role_id;

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

	cmd->scan_type = SCAN_TYPE_SEARCH;
	cmd->rssi_threshold = -127;
	cmd->snr_threshold = 0;

	cmd->bss_type = SCAN_BSS_TYPE_ANY;

	cmd->ssid_from_list = 0;
	cmd->filter = 0;
	cmd->add_broadcast = 0;

	cmd->urgency = 0;
	cmd->protect = 0;

	cmd->n_probe_reqs = wl->conf.scan.num_probe_reqs;
	cmd->terminate_after = 0;

	/* configure channels */
	WARN_ON(req->n_ssids > 1);

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

	wlcore_set_scan_chan_params(wl, cmd_channels, req->channels,
				    req->n_channels, req->n_ssids,
				    SCAN_TYPE_SEARCH);
	wl18xx_adjust_channels(cmd, cmd_channels);

	/*
	 * all the cycles params (except total cycles) should
	 * remain 0 for normal scan
	 */
	cmd->total_cycles = 1;

	if (req->no_cck)
		cmd->rate = WL18XX_SCAN_RATE_6;

	cmd->tag = WL1271_SCAN_DEFAULT_TAG;

	if (req->n_ssids) {
		cmd->ssid_len = req->ssids[0].ssid_len;
		memcpy(cmd->ssid, req->ssids[0].ssid, cmd->ssid_len);
	}

	/* TODO: per-band ies? */
	if (cmd->active[0]) {
		u8 band = IEEE80211_BAND_2GHZ;
		ret = wl12xx_cmd_build_probe_req(wl, wlvif,
				 cmd->role_id, band,
				 req->ssids ? req->ssids[0].ssid : NULL,
				 req->ssids ? req->ssids[0].ssid_len : 0,
				 req->ie,
				 req->ie_len,
				 NULL,
				 0,
				 false);
		if (ret < 0) {
			wl1271_error("2.4GHz PROBE request template failed");
			goto out;
		}
	}

	if (cmd->active[1] || cmd->dfs) {
		u8 band = IEEE80211_BAND_5GHZ;
		ret = wl12xx_cmd_build_probe_req(wl, wlvif,
				 cmd->role_id, band,
				 req->ssids ? req->ssids[0].ssid : NULL,
				 req->ssids ? req->ssids[0].ssid_len : 0,
				 req->ie,
				 req->ie_len,
				 NULL,
				 0,
				 false);
		if (ret < 0) {
			wl1271_error("5GHz PROBE request template failed");
			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_channels);
	kfree(cmd);
	return ret;
}

void wl18xx_scan_completed(struct wl1271 *wl, struct wl12xx_vif *wlvif)
{
	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));
}

static
int wl18xx_scan_sched_scan_config(struct wl1271 *wl,
				  struct wl12xx_vif *wlvif,
				  struct cfg80211_sched_scan_request *req,
				  struct ieee80211_scan_ies *ies)
{
	struct wl18xx_cmd_scan_params *cmd;
	struct wlcore_scan_channels *cmd_channels = NULL;
	struct conf_sched_scan_settings *c = &wl->conf.sched_scan;
	int ret;
	int filter_type;

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

	filter_type = wlcore_scan_sched_scan_ssid_list(wl, wlvif, req);
	if (filter_type < 0)
		return filter_type;

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

	cmd->role_id = wlvif->role_id;

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

	cmd->scan_type = SCAN_TYPE_PERIODIC;
	cmd->rssi_threshold = c->rssi_threshold;
	cmd->snr_threshold = c->snr_threshold;

	/* don't filter on BSS type */
	cmd->bss_type = SCAN_BSS_TYPE_ANY;

	cmd->ssid_from_list = 1;
	if (filter_type == SCAN_SSID_FILTER_LIST)
		cmd->filter = 1;
	cmd->add_broadcast = 0;

	cmd->urgency = 0;
	cmd->protect = 0;

	cmd->n_probe_reqs = c->num_probe_reqs;
	/* don't stop scanning automatically when something is found */
	cmd->terminate_after = 0;

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

	/* configure channels */
	wlcore_set_scan_chan_params(wl, cmd_channels, req->channels,
				    req->n_channels, req->n_ssids,
				    SCAN_TYPE_PERIODIC);
	wl18xx_adjust_channels(cmd, cmd_channels);

	cmd->short_cycles_sec = 0;
	cmd->long_cycles_sec = cpu_to_le16(req->interval);
	cmd->short_cycles_count = 0;

	cmd->total_cycles = 0;

	cmd->tag = WL1271_SCAN_DEFAULT_TAG;

	/* create a PERIODIC_SCAN_REPORT_EVENT whenever we've got a match */
	cmd->report_threshold = 1;
	cmd->terminate_on_report = 0;

	if (cmd->active[0]) {
		u8 band = IEEE80211_BAND_2GHZ;
		ret = wl12xx_cmd_build_probe_req(wl, wlvif,
				 cmd->role_id, band,
				 req->ssids ? req->ssids[0].ssid : NULL,
				 req->ssids ? req->ssids[0].ssid_len : 0,
				 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 (cmd->active[1] || cmd->dfs) {
		u8 band = IEEE80211_BAND_5GHZ;
		ret = wl12xx_cmd_build_probe_req(wl, wlvif,
				 cmd->role_id, band,
				 req->ssids ? req->ssids[0].ssid : NULL,
				 req->ssids ? req->ssids[0].ssid_len : 0,
				 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: ", 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_channels);
	kfree(cmd);
	return ret;
}

int wl18xx_sched_scan_start(struct wl1271 *wl, struct wl12xx_vif *wlvif,
			    struct cfg80211_sched_scan_request *req,
			    struct ieee80211_scan_ies *ies)
{
	return wl18xx_scan_sched_scan_config(wl, wlvif, req, ies);
}

static int __wl18xx_scan_stop(struct wl1271 *wl, struct wl12xx_vif *wlvif,
			       u8 scan_type)
{
	struct wl18xx_cmd_scan_stop *stop;
	int ret;

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

	stop = kzalloc(sizeof(*stop), GFP_KERNEL);
	if (!stop) {
		wl1271_error("failed to alloc memory to send sched scan stop");
		return -ENOMEM;
	}

	stop->role_id = wlvif->role_id;
	stop->scan_type = scan_type;

	ret = wl1271_cmd_send(wl, CMD_STOP_SCAN, stop, sizeof(*stop), 0);
	if (ret < 0) {
		wl1271_error("failed to send sched scan stop command");
		goto out_free;
	}

out_free:
	kfree(stop);
	return ret;
}

void wl18xx_scan_sched_scan_stop(struct wl1271 *wl, struct wl12xx_vif *wlvif)
{
	__wl18xx_scan_stop(wl, wlvif, SCAN_TYPE_PERIODIC);
}
int wl18xx_scan_start(struct wl1271 *wl, struct wl12xx_vif *wlvif,
		      struct cfg80211_scan_request *req)
{
	return wl18xx_scan_send(wl, wlvif, req);
}

int wl18xx_scan_stop(struct wl1271 *wl, struct wl12xx_vif *wlvif)
{
	return __wl18xx_scan_stop(wl, wlvif, SCAN_TYPE_SEARCH);
}
OpenPOWER on IntegriCloud