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Diffstat (limited to 'drivers/net/wireless/wl12xx/wl1271_scan.c')
-rw-r--r--drivers/net/wireless/wl12xx/wl1271_scan.c257
1 files changed, 0 insertions, 257 deletions
diff --git a/drivers/net/wireless/wl12xx/wl1271_scan.c b/drivers/net/wireless/wl12xx/wl1271_scan.c
deleted file mode 100644
index fec43eed8c55..000000000000
--- a/drivers/net/wireless/wl12xx/wl1271_scan.c
+++ /dev/null
@@ -1,257 +0,0 @@
1/*
2 * This file is part of wl1271
3 *
4 * Copyright (C) 2009-2010 Nokia Corporation
5 *
6 * Contact: Luciano Coelho <luciano.coelho@nokia.com>
7 *
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.
11 *
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.
16 *
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
20 * 02110-1301 USA
21 *
22 */
23
24#include <linux/ieee80211.h>
25
26#include "wl1271.h"
27#include "wl1271_cmd.h"
28#include "wl1271_scan.h"
29#include "wl1271_acx.h"
30
31static int wl1271_get_scan_channels(struct wl1271 *wl,
32 struct cfg80211_scan_request *req,
33 struct basic_scan_channel_params *channels,
34 enum ieee80211_band band, bool passive)
35{
36 int i, j;
37 u32 flags;
38
39 for (i = 0, j = 0;
40 i < req->n_channels && j < WL1271_SCAN_MAX_CHANNELS;
41 i++) {
42
43 flags = req->channels[i]->flags;
44
45 if (!wl->scan.scanned_ch[i] &&
46 !(flags & IEEE80211_CHAN_DISABLED) &&
47 ((!!(flags & IEEE80211_CHAN_PASSIVE_SCAN)) == passive) &&
48 (req->channels[i]->band == band)) {
49
50 wl1271_debug(DEBUG_SCAN, "band %d, center_freq %d ",
51 req->channels[i]->band,
52 req->channels[i]->center_freq);
53 wl1271_debug(DEBUG_SCAN, "hw_value %d, flags %X",
54 req->channels[i]->hw_value,
55 req->channels[i]->flags);
56 wl1271_debug(DEBUG_SCAN,
57 "max_antenna_gain %d, max_power %d",
58 req->channels[i]->max_antenna_gain,
59 req->channels[i]->max_power);
60 wl1271_debug(DEBUG_SCAN, "beacon_found %d",
61 req->channels[i]->beacon_found);
62
63 channels[j].min_duration =
64 cpu_to_le32(WL1271_SCAN_CHAN_MIN_DURATION);
65 channels[j].max_duration =
66 cpu_to_le32(WL1271_SCAN_CHAN_MAX_DURATION);
67 channels[j].early_termination = 0;
68 channels[j].tx_power_att = req->channels[i]->max_power;
69 channels[j].channel = req->channels[i]->hw_value;
70
71 memset(&channels[j].bssid_lsb, 0xff, 4);
72 memset(&channels[j].bssid_msb, 0xff, 2);
73
74 /* Mark the channels we already used */
75 wl->scan.scanned_ch[i] = true;
76
77 j++;
78 }
79 }
80
81 return j;
82}
83
84#define WL1271_NOTHING_TO_SCAN 1
85
86static int wl1271_scan_send(struct wl1271 *wl, enum ieee80211_band band,
87 bool passive, u32 basic_rate)
88{
89 struct wl1271_cmd_scan *cmd;
90 struct wl1271_cmd_trigger_scan_to *trigger;
91 int ret;
92 u16 scan_options = 0;
93
94 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
95 trigger = kzalloc(sizeof(*trigger), GFP_KERNEL);
96 if (!cmd || !trigger) {
97 ret = -ENOMEM;
98 goto out;
99 }
100
101 /* We always use high priority scans */
102 scan_options = WL1271_SCAN_OPT_PRIORITY_HIGH;
103 if(passive)
104 scan_options |= WL1271_SCAN_OPT_PASSIVE;
105 cmd->params.scan_options = cpu_to_le16(scan_options);
106
107 cmd->params.n_ch = wl1271_get_scan_channels(wl, wl->scan.req,
108 cmd->channels,
109 band, passive);
110 if (cmd->params.n_ch == 0) {
111 ret = WL1271_NOTHING_TO_SCAN;
112 goto out;
113 }
114
115 cmd->params.tx_rate = cpu_to_le32(basic_rate);
116 cmd->params.rx_config_options = cpu_to_le32(CFG_RX_ALL_GOOD);
117 cmd->params.rx_filter_options =
118 cpu_to_le32(CFG_RX_PRSP_EN | CFG_RX_MGMT_EN | CFG_RX_BCN_EN);
119
120 cmd->params.n_probe_reqs = WL1271_SCAN_PROBE_REQS;
121 cmd->params.tx_rate = cpu_to_le32(basic_rate);
122 cmd->params.tid_trigger = 0;
123 cmd->params.scan_tag = WL1271_SCAN_DEFAULT_TAG;
124
125 if (band == IEEE80211_BAND_2GHZ)
126 cmd->params.band = WL1271_SCAN_BAND_2_4_GHZ;
127 else
128 cmd->params.band = WL1271_SCAN_BAND_5_GHZ;
129
130 if (wl->scan.ssid_len && wl->scan.ssid) {
131 cmd->params.ssid_len = wl->scan.ssid_len;
132 memcpy(cmd->params.ssid, wl->scan.ssid, wl->scan.ssid_len);
133 }
134
135 ret = wl1271_cmd_build_probe_req(wl, wl->scan.ssid, wl->scan.ssid_len,
136 wl->scan.req->ie, wl->scan.req->ie_len,
137 band);
138 if (ret < 0) {
139 wl1271_error("PROBE request template failed");
140 goto out;
141 }
142
143 /* disable the timeout */
144 trigger->timeout = 0;
145 ret = wl1271_cmd_send(wl, CMD_TRIGGER_SCAN_TO, trigger,
146 sizeof(*trigger), 0);
147 if (ret < 0) {
148 wl1271_error("trigger scan to failed for hw scan");
149 goto out;
150 }
151
152 wl1271_dump(DEBUG_SCAN, "SCAN: ", cmd, sizeof(*cmd));
153
154 ret = wl1271_cmd_send(wl, CMD_SCAN, cmd, sizeof(*cmd), 0);
155 if (ret < 0) {
156 wl1271_error("SCAN failed");
157 goto out;
158 }
159
160out:
161 kfree(cmd);
162 kfree(trigger);
163 return ret;
164}
165
166void wl1271_scan_stm(struct wl1271 *wl)
167{
168 int ret;
169
170 switch (wl->scan.state) {
171 case WL1271_SCAN_STATE_IDLE:
172 break;
173
174 case WL1271_SCAN_STATE_2GHZ_ACTIVE:
175 ret = wl1271_scan_send(wl, IEEE80211_BAND_2GHZ, false,
176 wl->conf.tx.basic_rate);
177 if (ret == WL1271_NOTHING_TO_SCAN) {
178 wl->scan.state = WL1271_SCAN_STATE_2GHZ_PASSIVE;
179 wl1271_scan_stm(wl);
180 }
181
182 break;
183
184 case WL1271_SCAN_STATE_2GHZ_PASSIVE:
185 ret = wl1271_scan_send(wl, IEEE80211_BAND_2GHZ, true,
186 wl->conf.tx.basic_rate);
187 if (ret == WL1271_NOTHING_TO_SCAN) {
188 if (wl1271_11a_enabled())
189 wl->scan.state = WL1271_SCAN_STATE_5GHZ_ACTIVE;
190 else
191 wl->scan.state = WL1271_SCAN_STATE_DONE;
192 wl1271_scan_stm(wl);
193 }
194
195 break;
196
197 case WL1271_SCAN_STATE_5GHZ_ACTIVE:
198 ret = wl1271_scan_send(wl, IEEE80211_BAND_5GHZ, false,
199 wl->conf.tx.basic_rate_5);
200 if (ret == WL1271_NOTHING_TO_SCAN) {
201 wl->scan.state = WL1271_SCAN_STATE_5GHZ_PASSIVE;
202 wl1271_scan_stm(wl);
203 }
204
205 break;
206
207 case WL1271_SCAN_STATE_5GHZ_PASSIVE:
208 ret = wl1271_scan_send(wl, IEEE80211_BAND_5GHZ, true,
209 wl->conf.tx.basic_rate_5);
210 if (ret == WL1271_NOTHING_TO_SCAN) {
211 wl->scan.state = WL1271_SCAN_STATE_DONE;
212 wl1271_scan_stm(wl);
213 }
214
215 break;
216
217 case WL1271_SCAN_STATE_DONE:
218 mutex_unlock(&wl->mutex);
219 ieee80211_scan_completed(wl->hw, false);
220 mutex_lock(&wl->mutex);
221
222 kfree(wl->scan.scanned_ch);
223 wl->scan.scanned_ch = NULL;
224
225 wl->scan.state = WL1271_SCAN_STATE_IDLE;
226 break;
227
228 default:
229 wl1271_error("invalid scan state");
230 break;
231 }
232}
233
234int wl1271_scan(struct wl1271 *wl, const u8 *ssid, size_t ssid_len,
235 struct cfg80211_scan_request *req)
236{
237 if (wl->scan.state != WL1271_SCAN_STATE_IDLE)
238 return -EBUSY;
239
240 wl->scan.state = WL1271_SCAN_STATE_2GHZ_ACTIVE;
241
242 if (ssid_len && ssid) {
243 wl->scan.ssid_len = ssid_len;
244 memcpy(wl->scan.ssid, ssid, ssid_len);
245 } else {
246 wl->scan.ssid_len = 0;
247 }
248
249 wl->scan.req = req;
250
251 wl->scan.scanned_ch = kzalloc(req->n_channels *
252 sizeof(*wl->scan.scanned_ch),
253 GFP_KERNEL);
254 wl1271_scan_stm(wl);
255
256 return 0;
257}
generated by cgit v1.2.2 (git 2.25.0) at 2025-04-11 03:34:27 -0400