rt2x00: Check IEEE80211_TXCTL_SEND_AFTER_DTIM flag
[deliverable/linux.git] / drivers / net / wireless / rt2x00 / rt2x00config.c
CommitLineData
95ea3627 1/*
811aa9ca 2 Copyright (C) 2004 - 2008 rt2x00 SourceForge Project
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3 <http://rt2x00.serialmonkey.com>
4
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
9
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the
17 Free Software Foundation, Inc.,
18 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19 */
20
21/*
22 Module: rt2x00lib
23 Abstract: rt2x00 generic configuration routines.
24 */
25
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26#include <linux/kernel.h>
27#include <linux/module.h>
28
29#include "rt2x00.h"
30#include "rt2x00lib.h"
31
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32void rt2x00lib_config_intf(struct rt2x00_dev *rt2x00dev,
33 struct rt2x00_intf *intf,
34 enum ieee80211_if_types type,
35 u8 *mac, u8 *bssid)
95ea3627 36{
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37 struct rt2x00intf_conf conf;
38 unsigned int flags = 0;
95ea3627 39
6bb40dd1 40 conf.type = type;
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41
42 switch (type) {
43 case IEEE80211_IF_TYPE_IBSS:
44 case IEEE80211_IF_TYPE_AP:
6bb40dd1 45 conf.sync = TSF_SYNC_BEACON;
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46 break;
47 case IEEE80211_IF_TYPE_STA:
6bb40dd1 48 conf.sync = TSF_SYNC_INFRA;
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49 break;
50 default:
6bb40dd1 51 conf.sync = TSF_SYNC_NONE;
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52 break;
53 }
54
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55 /*
56 * Note that when NULL is passed as address we will send
57 * 00:00:00:00:00 to the device to clear the address.
58 * This will prevent the device being confused when it wants
59 * to ACK frames or consideres itself associated.
60 */
61 memset(&conf.mac, 0, sizeof(conf.mac));
62 if (mac)
63 memcpy(&conf.mac, mac, ETH_ALEN);
64
65 memset(&conf.bssid, 0, sizeof(conf.bssid));
66 if (bssid)
67 memcpy(&conf.bssid, bssid, ETH_ALEN);
68
69 flags |= CONFIG_UPDATE_TYPE;
70 if (mac || (!rt2x00dev->intf_ap_count && !rt2x00dev->intf_sta_count))
71 flags |= CONFIG_UPDATE_MAC;
72 if (bssid || (!rt2x00dev->intf_ap_count && !rt2x00dev->intf_sta_count))
73 flags |= CONFIG_UPDATE_BSSID;
74
75 rt2x00dev->ops->lib->config_intf(rt2x00dev, intf, &conf, flags);
76}
77
78void rt2x00lib_config_preamble(struct rt2x00_dev *rt2x00dev,
79 struct rt2x00_intf *intf,
80 const unsigned int short_preamble)
81{
82 int retval;
83 int ack_timeout;
84 int ack_consume_time;
85
86 ack_timeout = PLCP + get_duration(ACK_SIZE, 10);
87 ack_consume_time = SIFS + PLCP + get_duration(ACK_SIZE, 10);
88
89 if (rt2x00dev->hw->conf.flags & IEEE80211_CONF_SHORT_SLOT_TIME)
90 ack_timeout += SHORT_DIFS;
91 else
92 ack_timeout += DIFS;
93
94 if (short_preamble) {
95 ack_timeout += SHORT_PREAMBLE;
96 ack_consume_time += SHORT_PREAMBLE;
97 } else {
98 ack_timeout += PREAMBLE;
99 ack_consume_time += PREAMBLE;
100 }
101
102 retval = rt2x00dev->ops->lib->config_preamble(rt2x00dev,
103 short_preamble,
104 ack_timeout,
105 ack_consume_time);
106
107 spin_lock(&intf->lock);
108
109 if (retval) {
110 intf->delayed_flags |= DELAYED_CONFIG_PREAMBLE;
111 queue_work(rt2x00dev->hw->workqueue, &rt2x00dev->intf_work);
112 }
113
114 spin_unlock(&intf->lock);
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115}
116
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117void rt2x00lib_config_antenna(struct rt2x00_dev *rt2x00dev,
118 enum antenna rx, enum antenna tx)
119{
120 struct rt2x00lib_conf libconf;
121
122 libconf.ant.rx = rx;
123 libconf.ant.tx = tx;
124
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125 if (rx == rt2x00dev->link.ant.active.rx &&
126 tx == rt2x00dev->link.ant.active.tx)
127 return;
128
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129 /*
130 * Antenna setup changes require the RX to be disabled,
131 * else the changes will be ignored by the device.
132 */
133 if (test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
61667d8d 134 rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_OFF_LINK);
e25c4bb9 135
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136 /*
137 * Write new antenna setup to device and reset the link tuner.
138 * The latter is required since we need to recalibrate the
139 * noise-sensitivity ratio for the new setup.
140 */
6bb40dd1 141 rt2x00dev->ops->lib->config(rt2x00dev, &libconf, CONFIG_UPDATE_ANTENNA);
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142 rt2x00lib_reset_link_tuner(rt2x00dev);
143
144 rt2x00dev->link.ant.active.rx = libconf.ant.rx;
145 rt2x00dev->link.ant.active.tx = libconf.ant.tx;
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146
147 if (test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
61667d8d 148 rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_ON_LINK);
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149}
150
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151void rt2x00lib_config(struct rt2x00_dev *rt2x00dev,
152 struct ieee80211_conf *conf, const int force_config)
95ea3627 153{
5c58ee51 154 struct rt2x00lib_conf libconf;
8318d78a 155 struct ieee80211_supported_band *band;
5c58ee51 156 struct ieee80211_rate *rate;
addc81bd 157 struct antenna_setup *default_ant = &rt2x00dev->default_ant;
69f81a2c 158 struct antenna_setup *active_ant = &rt2x00dev->link.ant.active;
95ea3627 159 int flags = 0;
5c58ee51 160 int short_slot_time;
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161
162 /*
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163 * In some situations we want to force all configurations
164 * to be reloaded (When resuming for instance).
95ea3627 165 */
066cb637 166 if (force_config) {
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167 flags = CONFIG_UPDATE_ALL;
168 goto config;
169 }
170
171 /*
172 * Check which configuration options have been
173 * updated and should be send to the device.
174 */
8318d78a 175 if (rt2x00dev->rx_status.band != conf->channel->band)
95ea3627 176 flags |= CONFIG_UPDATE_PHYMODE;
8318d78a 177 if (rt2x00dev->rx_status.freq != conf->channel->center_freq)
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178 flags |= CONFIG_UPDATE_CHANNEL;
179 if (rt2x00dev->tx_power != conf->power_level)
180 flags |= CONFIG_UPDATE_TXPOWER;
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181
182 /*
183 * Determining changes in the antenna setups request several checks:
184 * antenna_sel_{r,t}x = 0
185 * -> Does active_{r,t}x match default_{r,t}x
186 * -> Is default_{r,t}x SW_DIVERSITY
187 * antenna_sel_{r,t}x = 1/2
188 * -> Does active_{r,t}x match antenna_sel_{r,t}x
189 * The reason for not updating the antenna while SW diversity
190 * should be used is simple: Software diversity means that
191 * we should switch between the antenna's based on the
192 * quality. This means that the current antenna is good enough
193 * to work with untill the link tuner decides that an antenna
194 * switch should be performed.
195 */
196 if (!conf->antenna_sel_rx &&
197 default_ant->rx != ANTENNA_SW_DIVERSITY &&
198 default_ant->rx != active_ant->rx)
199 flags |= CONFIG_UPDATE_ANTENNA;
200 else if (conf->antenna_sel_rx &&
201 conf->antenna_sel_rx != active_ant->rx)
202 flags |= CONFIG_UPDATE_ANTENNA;
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203 else if (active_ant->rx == ANTENNA_SW_DIVERSITY)
204 flags |= CONFIG_UPDATE_ANTENNA;
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205
206 if (!conf->antenna_sel_tx &&
207 default_ant->tx != ANTENNA_SW_DIVERSITY &&
208 default_ant->tx != active_ant->tx)
209 flags |= CONFIG_UPDATE_ANTENNA;
210 else if (conf->antenna_sel_tx &&
211 conf->antenna_sel_tx != active_ant->tx)
95ea3627 212 flags |= CONFIG_UPDATE_ANTENNA;
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213 else if (active_ant->tx == ANTENNA_SW_DIVERSITY)
214 flags |= CONFIG_UPDATE_ANTENNA;
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215
216 /*
217 * The following configuration options are never
218 * stored anywhere and will always be updated.
219 */
220 flags |= CONFIG_UPDATE_SLOT_TIME;
221 flags |= CONFIG_UPDATE_BEACON_INT;
222
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223 /*
224 * We have determined what options should be updated,
225 * now precalculate device configuration values depending
226 * on what configuration options need to be updated.
227 */
95ea3627 228config:
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229 memset(&libconf, 0, sizeof(libconf));
230
231 if (flags & CONFIG_UPDATE_PHYMODE) {
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232 band = &rt2x00dev->bands[conf->channel->band];
233 rate = &band->bitrates[band->n_bitrates - 1];
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234
235 libconf.band = conf->channel->band;
70e2fed4 236 libconf.basic_rates = rt2x00_get_rate(rate->hw_value)->ratemask;
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237 }
238
239 if (flags & CONFIG_UPDATE_CHANNEL) {
240 memcpy(&libconf.rf,
8318d78a 241 &rt2x00dev->spec.channels[conf->channel->hw_value],
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242 sizeof(libconf.rf));
243 }
244
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245 if (flags & CONFIG_UPDATE_ANTENNA) {
246 if (conf->antenna_sel_rx)
247 libconf.ant.rx = conf->antenna_sel_rx;
248 else if (default_ant->rx != ANTENNA_SW_DIVERSITY)
249 libconf.ant.rx = default_ant->rx;
250 else if (active_ant->rx == ANTENNA_SW_DIVERSITY)
251 libconf.ant.rx = ANTENNA_B;
252
253 if (conf->antenna_sel_tx)
254 libconf.ant.tx = conf->antenna_sel_tx;
255 else if (default_ant->tx != ANTENNA_SW_DIVERSITY)
256 libconf.ant.tx = default_ant->tx;
257 else if (active_ant->tx == ANTENNA_SW_DIVERSITY)
258 libconf.ant.tx = ANTENNA_B;
259 }
260
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261 if (flags & CONFIG_UPDATE_SLOT_TIME) {
262 short_slot_time = conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME;
263
264 libconf.slot_time =
265 short_slot_time ? SHORT_SLOT_TIME : SLOT_TIME;
266 libconf.sifs = SIFS;
267 libconf.pifs = short_slot_time ? SHORT_PIFS : PIFS;
268 libconf.difs = short_slot_time ? SHORT_DIFS : DIFS;
269 libconf.eifs = EIFS;
270 }
271
272 libconf.conf = conf;
273
274 /*
275 * Start configuration.
276 */
6bb40dd1 277 rt2x00dev->ops->lib->config(rt2x00dev, &libconf, flags);
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278
279 /*
280 * Some configuration changes affect the link quality
281 * which means we need to reset the link tuner.
282 */
283 if (flags & (CONFIG_UPDATE_CHANNEL | CONFIG_UPDATE_ANTENNA))
284 rt2x00lib_reset_link_tuner(rt2x00dev);
285
16b1951f 286 if (flags & CONFIG_UPDATE_PHYMODE) {
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287 rt2x00dev->curr_band = conf->channel->band;
288 rt2x00dev->rx_status.band = conf->channel->band;
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289 }
290
8318d78a 291 rt2x00dev->rx_status.freq = conf->channel->center_freq;
95ea3627 292 rt2x00dev->tx_power = conf->power_level;
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293
294 if (flags & CONFIG_UPDATE_ANTENNA) {
295 rt2x00dev->link.ant.active.rx = libconf.ant.rx;
296 rt2x00dev->link.ant.active.tx = libconf.ant.tx;
297 }
95ea3627 298}
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