2 Copyright (C) 2004 - 2008 rt2x00 SourceForge Project
3 <http://rt2x00.serialmonkey.com>
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.
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.
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.
23 Abstract: rt2x00 generic configuration routines.
26 #include <linux/kernel.h>
27 #include <linux/module.h>
30 #include "rt2x00lib.h"
32 void rt2x00lib_config_intf(struct rt2x00_dev *rt2x00dev,
33 struct rt2x00_intf *intf,
34 enum ieee80211_if_types type,
37 struct rt2x00intf_conf conf;
38 unsigned int flags = 0;
43 case IEEE80211_IF_TYPE_IBSS:
44 case IEEE80211_IF_TYPE_AP:
45 conf.sync = TSF_SYNC_BEACON;
47 case IEEE80211_IF_TYPE_STA:
48 conf.sync = TSF_SYNC_INFRA;
51 conf.sync = TSF_SYNC_NONE;
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.
61 memset(&conf.mac, 0, sizeof(conf.mac));
63 memcpy(&conf.mac, mac, ETH_ALEN);
65 memset(&conf.bssid, 0, sizeof(conf.bssid));
67 memcpy(&conf.bssid, bssid, ETH_ALEN);
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;
75 rt2x00dev->ops->lib->config_intf(rt2x00dev, intf, &conf, flags);
78 void rt2x00lib_config_preamble(struct rt2x00_dev *rt2x00dev,
79 struct rt2x00_intf *intf,
80 const unsigned int short_preamble)
86 ack_timeout = PLCP + get_duration(ACK_SIZE, 10);
87 ack_consume_time = SIFS + PLCP + get_duration(ACK_SIZE, 10);
89 if (rt2x00dev->hw->conf.flags & IEEE80211_CONF_SHORT_SLOT_TIME)
90 ack_timeout += SHORT_DIFS;
95 ack_timeout += SHORT_PREAMBLE;
96 ack_consume_time += SHORT_PREAMBLE;
98 ack_timeout += PREAMBLE;
99 ack_consume_time += PREAMBLE;
102 retval = rt2x00dev->ops->lib->config_preamble(rt2x00dev,
107 spin_lock(&intf->lock);
110 intf->delayed_flags |= DELAYED_CONFIG_PREAMBLE;
111 queue_work(rt2x00dev->hw->workqueue, &rt2x00dev->intf_work);
114 spin_unlock(&intf->lock);
117 void rt2x00lib_config_antenna(struct rt2x00_dev *rt2x00dev,
118 enum antenna rx, enum antenna tx)
120 struct rt2x00lib_conf libconf;
125 if (rx == rt2x00dev->link.ant.active.rx &&
126 tx == rt2x00dev->link.ant.active.tx)
130 * Antenna setup changes require the RX to be disabled,
131 * else the changes will be ignored by the device.
133 if (test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
134 rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_OFF_LINK);
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.
141 rt2x00dev->ops->lib->config(rt2x00dev, &libconf, CONFIG_UPDATE_ANTENNA);
142 rt2x00lib_reset_link_tuner(rt2x00dev);
144 rt2x00dev->link.ant.active.rx = libconf.ant.rx;
145 rt2x00dev->link.ant.active.tx = libconf.ant.tx;
147 if (test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
148 rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_ON_LINK);
151 void rt2x00lib_config(struct rt2x00_dev *rt2x00dev,
152 struct ieee80211_conf *conf, const int force_config)
154 struct rt2x00lib_conf libconf;
155 struct ieee80211_supported_band *band;
156 struct ieee80211_rate *rate;
157 struct antenna_setup *default_ant = &rt2x00dev->default_ant;
158 struct antenna_setup *active_ant = &rt2x00dev->link.ant.active;
163 * In some situations we want to force all configurations
164 * to be reloaded (When resuming for instance).
167 flags = CONFIG_UPDATE_ALL;
172 * Check which configuration options have been
173 * updated and should be send to the device.
175 if (rt2x00dev->rx_status.band != conf->channel->band)
176 flags |= CONFIG_UPDATE_PHYMODE;
177 if (rt2x00dev->rx_status.freq != conf->channel->center_freq)
178 flags |= CONFIG_UPDATE_CHANNEL;
179 if (rt2x00dev->tx_power != conf->power_level)
180 flags |= CONFIG_UPDATE_TXPOWER;
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.
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;
203 else if (active_ant->rx == ANTENNA_SW_DIVERSITY)
204 flags |= CONFIG_UPDATE_ANTENNA;
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)
212 flags |= CONFIG_UPDATE_ANTENNA;
213 else if (active_ant->tx == ANTENNA_SW_DIVERSITY)
214 flags |= CONFIG_UPDATE_ANTENNA;
217 * The following configuration options are never
218 * stored anywhere and will always be updated.
220 flags |= CONFIG_UPDATE_SLOT_TIME;
221 flags |= CONFIG_UPDATE_BEACON_INT;
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.
229 memset(&libconf, 0, sizeof(libconf));
231 if (flags & CONFIG_UPDATE_PHYMODE) {
232 switch (conf->channel->band) {
233 case IEEE80211_BAND_5GHZ:
234 libconf.phymode = HWMODE_A;
236 case IEEE80211_BAND_2GHZ:
237 /* Uh oh. what about B? */
238 libconf.phymode = HWMODE_G;
242 "Attempt to configure unsupported mode (%d)"
243 "Defaulting to 802.11b", conf->channel->band);
244 libconf.phymode = HWMODE_B;
247 band = &rt2x00dev->bands[conf->channel->band];
248 rate = &band->bitrates[band->n_bitrates - 1];
250 libconf.basic_rates =
251 DEVICE_GET_RATE_FIELD(rate->hw_value, RATEMASK) & DEV_BASIC_RATEMASK;
254 if (flags & CONFIG_UPDATE_CHANNEL) {
256 &rt2x00dev->spec.channels[conf->channel->hw_value],
260 if (flags & CONFIG_UPDATE_ANTENNA) {
261 if (conf->antenna_sel_rx)
262 libconf.ant.rx = conf->antenna_sel_rx;
263 else if (default_ant->rx != ANTENNA_SW_DIVERSITY)
264 libconf.ant.rx = default_ant->rx;
265 else if (active_ant->rx == ANTENNA_SW_DIVERSITY)
266 libconf.ant.rx = ANTENNA_B;
268 if (conf->antenna_sel_tx)
269 libconf.ant.tx = conf->antenna_sel_tx;
270 else if (default_ant->tx != ANTENNA_SW_DIVERSITY)
271 libconf.ant.tx = default_ant->tx;
272 else if (active_ant->tx == ANTENNA_SW_DIVERSITY)
273 libconf.ant.tx = ANTENNA_B;
276 if (flags & CONFIG_UPDATE_SLOT_TIME) {
277 short_slot_time = conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME;
280 short_slot_time ? SHORT_SLOT_TIME : SLOT_TIME;
282 libconf.pifs = short_slot_time ? SHORT_PIFS : PIFS;
283 libconf.difs = short_slot_time ? SHORT_DIFS : DIFS;
290 * Start configuration.
292 rt2x00dev->ops->lib->config(rt2x00dev, &libconf, flags);
295 * Some configuration changes affect the link quality
296 * which means we need to reset the link tuner.
298 if (flags & (CONFIG_UPDATE_CHANNEL | CONFIG_UPDATE_ANTENNA))
299 rt2x00lib_reset_link_tuner(rt2x00dev);
301 if (flags & CONFIG_UPDATE_PHYMODE) {
302 rt2x00dev->curr_band = conf->channel->band;
303 rt2x00dev->rx_status.band = conf->channel->band;
306 rt2x00dev->rx_status.freq = conf->channel->center_freq;
307 rt2x00dev->tx_power = conf->power_level;
309 if (flags & CONFIG_UPDATE_ANTENNA) {
310 rt2x00dev->link.ant.active.rx = libconf.ant.rx;
311 rt2x00dev->link.ant.active.tx = libconf.ant.tx;