2 Copyright (C) 2004 - 2007 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"
34 * The MAC and BSSID addressess are simple array of bytes,
35 * these arrays are little endian, so when sending the addressess
36 * to the drivers, copy the it into a endian-signed variable.
38 * Note that all devices (except rt2500usb) have 32 bits
39 * register word sizes. This means that whatever variable we
40 * pass _must_ be a multiple of 32 bits. Otherwise the device
41 * might not accept what we are sending to it.
42 * This will also make it easier for the driver to write
43 * the data to the device.
45 * Also note that when NULL is passed as address the
46 * we will send 00:00:00:00:00 to the device to clear the address.
47 * This will prevent the device being confused when it wants
48 * to ACK frames or consideres itself associated.
50 void rt2x00lib_config_mac_addr(struct rt2x00_dev *rt2x00dev, u8 *mac)
54 memset(®, 0, sizeof(reg));
56 memcpy(®, mac, ETH_ALEN);
58 rt2x00dev->ops->lib->config_mac_addr(rt2x00dev, ®[0]);
61 void rt2x00lib_config_bssid(struct rt2x00_dev *rt2x00dev, u8 *bssid)
65 memset(®, 0, sizeof(reg));
67 memcpy(®, bssid, ETH_ALEN);
69 rt2x00dev->ops->lib->config_bssid(rt2x00dev, ®[0]);
72 void rt2x00lib_config_type(struct rt2x00_dev *rt2x00dev, const int type)
77 case IEEE80211_IF_TYPE_IBSS:
78 case IEEE80211_IF_TYPE_AP:
79 tsf_sync = TSF_SYNC_BEACON;
81 case IEEE80211_IF_TYPE_STA:
82 tsf_sync = TSF_SYNC_INFRA;
85 tsf_sync = TSF_SYNC_NONE;
89 rt2x00dev->ops->lib->config_type(rt2x00dev, type, tsf_sync);
92 void rt2x00lib_config_antenna(struct rt2x00_dev *rt2x00dev,
93 enum antenna rx, enum antenna tx)
95 struct rt2x00lib_conf libconf;
101 * Antenna setup changes require the RX to be disabled,
102 * else the changes will be ignored by the device.
104 if (test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
105 rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_OFF);
108 * Write new antenna setup to device and reset the link tuner.
109 * The latter is required since we need to recalibrate the
110 * noise-sensitivity ratio for the new setup.
112 rt2x00dev->ops->lib->config(rt2x00dev, CONFIG_UPDATE_ANTENNA, &libconf);
113 rt2x00lib_reset_link_tuner(rt2x00dev);
115 rt2x00dev->link.ant.active.rx = libconf.ant.rx;
116 rt2x00dev->link.ant.active.tx = libconf.ant.tx;
118 if (test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
119 rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_ON);
122 void rt2x00lib_config(struct rt2x00_dev *rt2x00dev,
123 struct ieee80211_conf *conf, const int force_config)
125 struct rt2x00lib_conf libconf;
126 struct ieee80211_hw_mode *mode;
127 struct ieee80211_rate *rate;
128 struct antenna_setup *default_ant = &rt2x00dev->default_ant;
129 struct antenna_setup *active_ant = &rt2x00dev->link.ant.active;
134 * In some situations we want to force all configurations
135 * to be reloaded (When resuming for instance).
138 flags = CONFIG_UPDATE_ALL;
143 * Check which configuration options have been
144 * updated and should be send to the device.
146 if (rt2x00dev->rx_status.phymode != conf->phymode)
147 flags |= CONFIG_UPDATE_PHYMODE;
148 if (rt2x00dev->rx_status.channel != conf->channel)
149 flags |= CONFIG_UPDATE_CHANNEL;
150 if (rt2x00dev->tx_power != conf->power_level)
151 flags |= CONFIG_UPDATE_TXPOWER;
154 * Determining changes in the antenna setups request several checks:
155 * antenna_sel_{r,t}x = 0
156 * -> Does active_{r,t}x match default_{r,t}x
157 * -> Is default_{r,t}x SW_DIVERSITY
158 * antenna_sel_{r,t}x = 1/2
159 * -> Does active_{r,t}x match antenna_sel_{r,t}x
160 * The reason for not updating the antenna while SW diversity
161 * should be used is simple: Software diversity means that
162 * we should switch between the antenna's based on the
163 * quality. This means that the current antenna is good enough
164 * to work with untill the link tuner decides that an antenna
165 * switch should be performed.
167 if (!conf->antenna_sel_rx &&
168 default_ant->rx != ANTENNA_SW_DIVERSITY &&
169 default_ant->rx != active_ant->rx)
170 flags |= CONFIG_UPDATE_ANTENNA;
171 else if (conf->antenna_sel_rx &&
172 conf->antenna_sel_rx != active_ant->rx)
173 flags |= CONFIG_UPDATE_ANTENNA;
174 else if (active_ant->rx == ANTENNA_SW_DIVERSITY)
175 flags |= CONFIG_UPDATE_ANTENNA;
177 if (!conf->antenna_sel_tx &&
178 default_ant->tx != ANTENNA_SW_DIVERSITY &&
179 default_ant->tx != active_ant->tx)
180 flags |= CONFIG_UPDATE_ANTENNA;
181 else if (conf->antenna_sel_tx &&
182 conf->antenna_sel_tx != active_ant->tx)
183 flags |= CONFIG_UPDATE_ANTENNA;
184 else if (active_ant->tx == ANTENNA_SW_DIVERSITY)
185 flags |= CONFIG_UPDATE_ANTENNA;
188 * The following configuration options are never
189 * stored anywhere and will always be updated.
191 flags |= CONFIG_UPDATE_SLOT_TIME;
192 flags |= CONFIG_UPDATE_BEACON_INT;
195 * We have determined what options should be updated,
196 * now precalculate device configuration values depending
197 * on what configuration options need to be updated.
200 memset(&libconf, 0, sizeof(libconf));
202 if (flags & CONFIG_UPDATE_PHYMODE) {
203 switch (conf->phymode) {
204 case MODE_IEEE80211A:
205 libconf.phymode = HWMODE_A;
207 case MODE_IEEE80211B:
208 libconf.phymode = HWMODE_B;
210 case MODE_IEEE80211G:
211 libconf.phymode = HWMODE_G;
215 "Attempt to configure unsupported mode (%d)"
216 "Defaulting to 802.11b", conf->phymode);
217 libconf.phymode = HWMODE_B;
220 mode = &rt2x00dev->hwmodes[libconf.phymode];
221 rate = &mode->rates[mode->num_rates - 1];
223 libconf.basic_rates =
224 DEVICE_GET_RATE_FIELD(rate->val, RATEMASK) & DEV_BASIC_RATEMASK;
227 if (flags & CONFIG_UPDATE_CHANNEL) {
229 &rt2x00dev->spec.channels[conf->channel_val],
233 if (flags & CONFIG_UPDATE_ANTENNA) {
234 if (conf->antenna_sel_rx)
235 libconf.ant.rx = conf->antenna_sel_rx;
236 else if (default_ant->rx != ANTENNA_SW_DIVERSITY)
237 libconf.ant.rx = default_ant->rx;
238 else if (active_ant->rx == ANTENNA_SW_DIVERSITY)
239 libconf.ant.rx = ANTENNA_B;
241 if (conf->antenna_sel_tx)
242 libconf.ant.tx = conf->antenna_sel_tx;
243 else if (default_ant->tx != ANTENNA_SW_DIVERSITY)
244 libconf.ant.tx = default_ant->tx;
245 else if (active_ant->tx == ANTENNA_SW_DIVERSITY)
246 libconf.ant.tx = ANTENNA_B;
249 if (flags & CONFIG_UPDATE_SLOT_TIME) {
250 short_slot_time = conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME;
253 short_slot_time ? SHORT_SLOT_TIME : SLOT_TIME;
255 libconf.pifs = short_slot_time ? SHORT_PIFS : PIFS;
256 libconf.difs = short_slot_time ? SHORT_DIFS : DIFS;
263 * Start configuration.
265 rt2x00dev->ops->lib->config(rt2x00dev, flags, &libconf);
268 * Some configuration changes affect the link quality
269 * which means we need to reset the link tuner.
271 if (flags & (CONFIG_UPDATE_CHANNEL | CONFIG_UPDATE_ANTENNA))
272 rt2x00lib_reset_link_tuner(rt2x00dev);
274 if (flags & CONFIG_UPDATE_PHYMODE) {
275 rt2x00dev->curr_hwmode = libconf.phymode;
276 rt2x00dev->rx_status.phymode = conf->phymode;
279 rt2x00dev->rx_status.freq = conf->freq;
280 rt2x00dev->rx_status.channel = conf->channel;
281 rt2x00dev->tx_power = conf->power_level;
283 if (flags & CONFIG_UPDATE_ANTENNA) {
284 rt2x00dev->link.ant.active.rx = libconf.ant.rx;
285 rt2x00dev->link.ant.active.tx = libconf.ant.tx;