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.ack_timeout = PLCP + get_duration(ACK_SIZE, 10);
88 erp.ack_consume_time = SIFS + PLCP + get_duration(ACK_SIZE, 10);
90 if (rt2x00dev->hw->conf.flags & IEEE80211_CONF_SHORT_SLOT_TIME)
91 erp.ack_timeout += SHORT_DIFS;
93 erp.ack_timeout += DIFS;
95 if (bss_conf->use_short_preamble) {
96 erp.ack_timeout += SHORT_PREAMBLE;
97 erp.ack_consume_time += SHORT_PREAMBLE;
99 erp.ack_timeout += PREAMBLE;
100 erp.ack_consume_time += PREAMBLE;
103 rt2x00dev->ops->lib->config_erp(rt2x00dev, &erp);
106 void rt2x00lib_config_antenna(struct rt2x00_dev *rt2x00dev,
107 enum antenna rx, enum antenna tx)
109 struct rt2x00lib_conf libconf;
114 if (rx == rt2x00dev->link.ant.active.rx &&
115 tx == rt2x00dev->link.ant.active.tx)
119 * Antenna setup changes require the RX to be disabled,
120 * else the changes will be ignored by the device.
122 if (test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
123 rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_OFF_LINK);
126 * Write new antenna setup to device and reset the link tuner.
127 * The latter is required since we need to recalibrate the
128 * noise-sensitivity ratio for the new setup.
130 rt2x00dev->ops->lib->config(rt2x00dev, &libconf, CONFIG_UPDATE_ANTENNA);
131 rt2x00lib_reset_link_tuner(rt2x00dev);
132 rt2x00_reset_link_ant_rssi(&rt2x00dev->link);
134 rt2x00dev->link.ant.active.rx = libconf.ant.rx;
135 rt2x00dev->link.ant.active.tx = libconf.ant.tx;
137 if (test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
138 rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_ON_LINK);
141 static u32 rt2x00lib_get_basic_rates(struct ieee80211_supported_band *band)
143 const struct rt2x00_rate *rate;
147 for (i = 0; i < band->n_bitrates; i++) {
148 rate = rt2x00_get_rate(band->bitrates[i].hw_value);
149 if (rate->flags & DEV_RATE_BASIC)
150 mask |= rate->ratemask;
156 void rt2x00lib_config(struct rt2x00_dev *rt2x00dev,
157 struct ieee80211_conf *conf, const int force_config)
159 struct rt2x00lib_conf libconf;
160 struct ieee80211_supported_band *band;
161 struct antenna_setup *default_ant = &rt2x00dev->default_ant;
162 struct antenna_setup *active_ant = &rt2x00dev->link.ant.active;
167 * In some situations we want to force all configurations
168 * to be reloaded (When resuming for instance).
171 flags = CONFIG_UPDATE_ALL;
176 * Check which configuration options have been
177 * updated and should be send to the device.
179 if (rt2x00dev->rx_status.band != conf->channel->band)
180 flags |= CONFIG_UPDATE_PHYMODE;
181 if (rt2x00dev->rx_status.freq != conf->channel->center_freq)
182 flags |= CONFIG_UPDATE_CHANNEL;
183 if (rt2x00dev->tx_power != conf->power_level)
184 flags |= CONFIG_UPDATE_TXPOWER;
187 * Determining changes in the antenna setups request several checks:
188 * antenna_sel_{r,t}x = 0
189 * -> Does active_{r,t}x match default_{r,t}x
190 * -> Is default_{r,t}x SW_DIVERSITY
191 * antenna_sel_{r,t}x = 1/2
192 * -> Does active_{r,t}x match antenna_sel_{r,t}x
193 * The reason for not updating the antenna while SW diversity
194 * should be used is simple: Software diversity means that
195 * we should switch between the antenna's based on the
196 * quality. This means that the current antenna is good enough
197 * to work with untill the link tuner decides that an antenna
198 * switch should be performed.
200 if (!conf->antenna_sel_rx &&
201 default_ant->rx != ANTENNA_SW_DIVERSITY &&
202 default_ant->rx != active_ant->rx)
203 flags |= CONFIG_UPDATE_ANTENNA;
204 else if (conf->antenna_sel_rx &&
205 conf->antenna_sel_rx != active_ant->rx)
206 flags |= CONFIG_UPDATE_ANTENNA;
207 else if (active_ant->rx == ANTENNA_SW_DIVERSITY)
208 flags |= CONFIG_UPDATE_ANTENNA;
210 if (!conf->antenna_sel_tx &&
211 default_ant->tx != ANTENNA_SW_DIVERSITY &&
212 default_ant->tx != active_ant->tx)
213 flags |= CONFIG_UPDATE_ANTENNA;
214 else if (conf->antenna_sel_tx &&
215 conf->antenna_sel_tx != active_ant->tx)
216 flags |= CONFIG_UPDATE_ANTENNA;
217 else if (active_ant->tx == ANTENNA_SW_DIVERSITY)
218 flags |= CONFIG_UPDATE_ANTENNA;
221 * The following configuration options are never
222 * stored anywhere and will always be updated.
224 flags |= CONFIG_UPDATE_SLOT_TIME;
225 flags |= CONFIG_UPDATE_BEACON_INT;
228 * We have determined what options should be updated,
229 * now precalculate device configuration values depending
230 * on what configuration options need to be updated.
233 memset(&libconf, 0, sizeof(libconf));
235 if (flags & CONFIG_UPDATE_PHYMODE) {
236 band = &rt2x00dev->bands[conf->channel->band];
238 libconf.band = conf->channel->band;
239 libconf.basic_rates = rt2x00lib_get_basic_rates(band);
242 if (flags & CONFIG_UPDATE_CHANNEL) {
244 &rt2x00dev->spec.channels[conf->channel->hw_value],
248 if (flags & CONFIG_UPDATE_ANTENNA) {
249 if (conf->antenna_sel_rx)
250 libconf.ant.rx = conf->antenna_sel_rx;
251 else if (default_ant->rx != ANTENNA_SW_DIVERSITY)
252 libconf.ant.rx = default_ant->rx;
253 else if (active_ant->rx == ANTENNA_SW_DIVERSITY)
254 libconf.ant.rx = ANTENNA_B;
256 if (conf->antenna_sel_tx)
257 libconf.ant.tx = conf->antenna_sel_tx;
258 else if (default_ant->tx != ANTENNA_SW_DIVERSITY)
259 libconf.ant.tx = default_ant->tx;
260 else if (active_ant->tx == ANTENNA_SW_DIVERSITY)
261 libconf.ant.tx = ANTENNA_B;
264 if (flags & CONFIG_UPDATE_SLOT_TIME) {
265 short_slot_time = conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME;
268 short_slot_time ? SHORT_SLOT_TIME : SLOT_TIME;
270 libconf.pifs = short_slot_time ? SHORT_PIFS : PIFS;
271 libconf.difs = short_slot_time ? SHORT_DIFS : DIFS;
278 * Start configuration.
280 rt2x00dev->ops->lib->config(rt2x00dev, &libconf, flags);
283 * Some configuration changes affect the link quality
284 * which means we need to reset the link tuner.
286 if (flags & (CONFIG_UPDATE_CHANNEL | CONFIG_UPDATE_ANTENNA))
287 rt2x00lib_reset_link_tuner(rt2x00dev);
289 if (flags & CONFIG_UPDATE_PHYMODE) {
290 rt2x00dev->curr_band = conf->channel->band;
291 rt2x00dev->rx_status.band = conf->channel->band;
294 rt2x00dev->rx_status.freq = conf->channel->center_freq;
295 rt2x00dev->tx_power = conf->power_level;
297 if (flags & CONFIG_UPDATE_ANTENNA) {
298 rt2x00dev->link.ant.active.rx = libconf.ant.rx;
299 rt2x00dev->link.ant.active.tx = libconf.ant.tx;