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_erp(struct rt2x00_dev *rt2x00dev,
79 struct rt2x00_intf *intf,
80 struct ieee80211_bss_conf *bss_conf)
82 struct rt2x00lib_erp erp;
84 memset(&erp, 0, sizeof(erp));
86 erp.short_preamble = bss_conf->use_short_preamble;
87 erp.cts_protection = bss_conf->use_cts_prot;
89 erp.ack_timeout = PLCP + get_duration(ACK_SIZE, 10);
90 erp.ack_consume_time = SIFS + PLCP + get_duration(ACK_SIZE, 10);
92 if (rt2x00dev->hw->conf.flags & IEEE80211_CONF_SHORT_SLOT_TIME)
93 erp.ack_timeout += SHORT_DIFS;
95 erp.ack_timeout += DIFS;
97 if (bss_conf->use_short_preamble) {
98 erp.ack_timeout += SHORT_PREAMBLE;
99 erp.ack_consume_time += SHORT_PREAMBLE;
101 erp.ack_timeout += PREAMBLE;
102 erp.ack_consume_time += PREAMBLE;
105 rt2x00dev->ops->lib->config_erp(rt2x00dev, &erp);
108 void rt2x00lib_config_antenna(struct rt2x00_dev *rt2x00dev,
109 enum antenna rx, enum antenna tx)
111 struct rt2x00lib_conf libconf;
116 if (rx == rt2x00dev->link.ant.active.rx &&
117 tx == rt2x00dev->link.ant.active.tx)
121 * Antenna setup changes require the RX to be disabled,
122 * else the changes will be ignored by the device.
124 if (test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
125 rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_OFF_LINK);
128 * Write new antenna setup to device and reset the link tuner.
129 * The latter is required since we need to recalibrate the
130 * noise-sensitivity ratio for the new setup.
132 rt2x00dev->ops->lib->config(rt2x00dev, &libconf, CONFIG_UPDATE_ANTENNA);
133 rt2x00lib_reset_link_tuner(rt2x00dev);
134 rt2x00_reset_link_ant_rssi(&rt2x00dev->link);
136 rt2x00dev->link.ant.active.rx = libconf.ant.rx;
137 rt2x00dev->link.ant.active.tx = libconf.ant.tx;
139 if (test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
140 rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_ON_LINK);
143 static u32 rt2x00lib_get_basic_rates(struct ieee80211_supported_band *band)
145 const struct rt2x00_rate *rate;
149 for (i = 0; i < band->n_bitrates; i++) {
150 rate = rt2x00_get_rate(band->bitrates[i].hw_value);
151 if (rate->flags & DEV_RATE_BASIC)
152 mask |= rate->ratemask;
158 void rt2x00lib_config(struct rt2x00_dev *rt2x00dev,
159 struct ieee80211_conf *conf, const int force_config)
161 struct rt2x00lib_conf libconf;
162 struct ieee80211_supported_band *band;
163 struct antenna_setup *default_ant = &rt2x00dev->default_ant;
164 struct antenna_setup *active_ant = &rt2x00dev->link.ant.active;
169 * In some situations we want to force all configurations
170 * to be reloaded (When resuming for instance).
173 flags = CONFIG_UPDATE_ALL;
178 * Check which configuration options have been
179 * updated and should be send to the device.
181 if (rt2x00dev->rx_status.band != conf->channel->band)
182 flags |= CONFIG_UPDATE_PHYMODE;
183 if (rt2x00dev->rx_status.freq != conf->channel->center_freq)
184 flags |= CONFIG_UPDATE_CHANNEL;
185 if (rt2x00dev->tx_power != conf->power_level)
186 flags |= CONFIG_UPDATE_TXPOWER;
189 * Determining changes in the antenna setups request several checks:
190 * antenna_sel_{r,t}x = 0
191 * -> Does active_{r,t}x match default_{r,t}x
192 * -> Is default_{r,t}x SW_DIVERSITY
193 * antenna_sel_{r,t}x = 1/2
194 * -> Does active_{r,t}x match antenna_sel_{r,t}x
195 * The reason for not updating the antenna while SW diversity
196 * should be used is simple: Software diversity means that
197 * we should switch between the antenna's based on the
198 * quality. This means that the current antenna is good enough
199 * to work with untill the link tuner decides that an antenna
200 * switch should be performed.
202 if (!conf->antenna_sel_rx &&
203 default_ant->rx != ANTENNA_SW_DIVERSITY &&
204 default_ant->rx != active_ant->rx)
205 flags |= CONFIG_UPDATE_ANTENNA;
206 else if (conf->antenna_sel_rx &&
207 conf->antenna_sel_rx != active_ant->rx)
208 flags |= CONFIG_UPDATE_ANTENNA;
209 else if (active_ant->rx == ANTENNA_SW_DIVERSITY)
210 flags |= CONFIG_UPDATE_ANTENNA;
212 if (!conf->antenna_sel_tx &&
213 default_ant->tx != ANTENNA_SW_DIVERSITY &&
214 default_ant->tx != active_ant->tx)
215 flags |= CONFIG_UPDATE_ANTENNA;
216 else if (conf->antenna_sel_tx &&
217 conf->antenna_sel_tx != active_ant->tx)
218 flags |= CONFIG_UPDATE_ANTENNA;
219 else if (active_ant->tx == ANTENNA_SW_DIVERSITY)
220 flags |= CONFIG_UPDATE_ANTENNA;
223 * The following configuration options are never
224 * stored anywhere and will always be updated.
226 flags |= CONFIG_UPDATE_SLOT_TIME;
227 flags |= CONFIG_UPDATE_BEACON_INT;
230 * We have determined what options should be updated,
231 * now precalculate device configuration values depending
232 * on what configuration options need to be updated.
235 memset(&libconf, 0, sizeof(libconf));
237 if (flags & CONFIG_UPDATE_PHYMODE) {
238 band = &rt2x00dev->bands[conf->channel->band];
240 libconf.band = conf->channel->band;
241 libconf.basic_rates = rt2x00lib_get_basic_rates(band);
244 if (flags & CONFIG_UPDATE_CHANNEL) {
246 &rt2x00dev->spec.channels[conf->channel->hw_value],
250 if (flags & CONFIG_UPDATE_ANTENNA) {
251 if (conf->antenna_sel_rx)
252 libconf.ant.rx = conf->antenna_sel_rx;
253 else if (default_ant->rx != ANTENNA_SW_DIVERSITY)
254 libconf.ant.rx = default_ant->rx;
255 else if (active_ant->rx == ANTENNA_SW_DIVERSITY)
256 libconf.ant.rx = ANTENNA_B;
258 libconf.ant.rx = active_ant->rx;
260 if (conf->antenna_sel_tx)
261 libconf.ant.tx = conf->antenna_sel_tx;
262 else if (default_ant->tx != ANTENNA_SW_DIVERSITY)
263 libconf.ant.tx = default_ant->tx;
264 else if (active_ant->tx == ANTENNA_SW_DIVERSITY)
265 libconf.ant.tx = ANTENNA_B;
267 libconf.ant.tx = active_ant->tx;
270 if (flags & CONFIG_UPDATE_SLOT_TIME) {
271 short_slot_time = conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME;
274 short_slot_time ? SHORT_SLOT_TIME : SLOT_TIME;
276 libconf.pifs = short_slot_time ? SHORT_PIFS : PIFS;
277 libconf.difs = short_slot_time ? SHORT_DIFS : DIFS;
278 libconf.eifs = short_slot_time ? SHORT_EIFS : EIFS;
284 * Start configuration.
286 rt2x00dev->ops->lib->config(rt2x00dev, &libconf, flags);
289 * Some configuration changes affect the link quality
290 * which means we need to reset the link tuner.
292 if (flags & (CONFIG_UPDATE_CHANNEL | CONFIG_UPDATE_ANTENNA))
293 rt2x00lib_reset_link_tuner(rt2x00dev);
295 if (flags & CONFIG_UPDATE_PHYMODE) {
296 rt2x00dev->curr_band = conf->channel->band;
297 rt2x00dev->rx_status.band = conf->channel->band;
300 rt2x00dev->rx_status.freq = conf->channel->center_freq;
301 rt2x00dev->tx_power = conf->power_level;
303 if (flags & CONFIG_UPDATE_ANTENNA) {
304 rt2x00dev->link.ant.active.rx = libconf.ant.rx;
305 rt2x00dev->link.ant.active.tx = libconf.ant.tx;