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.
27 * Set enviroment defines for rt2x00.h
29 #define DRV_NAME "rt2x00lib"
31 #include <linux/kernel.h>
32 #include <linux/module.h>
35 #include "rt2x00lib.h"
39 * The MAC and BSSID addressess are simple array of bytes,
40 * these arrays are little endian, so when sending the addressess
41 * to the drivers, copy the it into a endian-signed variable.
43 * Note that all devices (except rt2500usb) have 32 bits
44 * register word sizes. This means that whatever variable we
45 * pass _must_ be a multiple of 32 bits. Otherwise the device
46 * might not accept what we are sending to it.
47 * This will also make it easier for the driver to write
48 * the data to the device.
50 * Also note that when NULL is passed as address the
51 * we will send 00:00:00:00:00 to the device to clear the address.
52 * This will prevent the device being confused when it wants
53 * to ACK frames or consideres itself associated.
55 void rt2x00lib_config_mac_addr(struct rt2x00_dev *rt2x00dev, u8 *mac)
59 memset(®, 0, sizeof(reg));
61 memcpy(®, mac, ETH_ALEN);
63 rt2x00dev->ops->lib->config_mac_addr(rt2x00dev, ®[0]);
66 void rt2x00lib_config_bssid(struct rt2x00_dev *rt2x00dev, u8 *bssid)
70 memset(®, 0, sizeof(reg));
72 memcpy(®, bssid, ETH_ALEN);
74 rt2x00dev->ops->lib->config_bssid(rt2x00dev, ®[0]);
77 void rt2x00lib_config_type(struct rt2x00_dev *rt2x00dev, const int type)
82 case IEEE80211_IF_TYPE_IBSS:
83 case IEEE80211_IF_TYPE_AP:
84 tsf_sync = TSF_SYNC_BEACON;
86 case IEEE80211_IF_TYPE_STA:
87 tsf_sync = TSF_SYNC_INFRA;
90 tsf_sync = TSF_SYNC_NONE;
94 rt2x00dev->ops->lib->config_type(rt2x00dev, type, tsf_sync);
97 void rt2x00lib_config_antenna(struct rt2x00_dev *rt2x00dev,
98 enum antenna rx, enum antenna tx)
100 struct rt2x00lib_conf libconf;
106 * Antenna setup changes require the RX to be disabled,
107 * else the changes will be ignored by the device.
109 if (test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
110 rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_OFF);
113 * Write new antenna setup to device and reset the link tuner.
114 * The latter is required since we need to recalibrate the
115 * noise-sensitivity ratio for the new setup.
117 rt2x00dev->ops->lib->config(rt2x00dev, CONFIG_UPDATE_ANTENNA, &libconf);
118 rt2x00lib_reset_link_tuner(rt2x00dev);
120 rt2x00dev->link.ant.active.rx = libconf.ant.rx;
121 rt2x00dev->link.ant.active.tx = libconf.ant.tx;
123 if (test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
124 rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_ON);
127 void rt2x00lib_config(struct rt2x00_dev *rt2x00dev,
128 struct ieee80211_conf *conf, const int force_config)
130 struct rt2x00lib_conf libconf;
131 struct ieee80211_hw_mode *mode;
132 struct ieee80211_rate *rate;
133 struct antenna_setup *default_ant = &rt2x00dev->default_ant;
134 struct antenna_setup *active_ant = &rt2x00dev->link.ant.active;
139 * In some situations we want to force all configurations
140 * to be reloaded (When resuming for instance).
143 flags = CONFIG_UPDATE_ALL;
148 * Check which configuration options have been
149 * updated and should be send to the device.
151 if (rt2x00dev->rx_status.phymode != conf->phymode)
152 flags |= CONFIG_UPDATE_PHYMODE;
153 if (rt2x00dev->rx_status.channel != conf->channel)
154 flags |= CONFIG_UPDATE_CHANNEL;
155 if (rt2x00dev->tx_power != conf->power_level)
156 flags |= CONFIG_UPDATE_TXPOWER;
159 * Determining changes in the antenna setups request several checks:
160 * antenna_sel_{r,t}x = 0
161 * -> Does active_{r,t}x match default_{r,t}x
162 * -> Is default_{r,t}x SW_DIVERSITY
163 * antenna_sel_{r,t}x = 1/2
164 * -> Does active_{r,t}x match antenna_sel_{r,t}x
165 * The reason for not updating the antenna while SW diversity
166 * should be used is simple: Software diversity means that
167 * we should switch between the antenna's based on the
168 * quality. This means that the current antenna is good enough
169 * to work with untill the link tuner decides that an antenna
170 * switch should be performed.
172 if (!conf->antenna_sel_rx &&
173 default_ant->rx != ANTENNA_SW_DIVERSITY &&
174 default_ant->rx != active_ant->rx)
175 flags |= CONFIG_UPDATE_ANTENNA;
176 else if (conf->antenna_sel_rx &&
177 conf->antenna_sel_rx != active_ant->rx)
178 flags |= CONFIG_UPDATE_ANTENNA;
179 else if (active_ant->rx == ANTENNA_SW_DIVERSITY)
180 flags |= CONFIG_UPDATE_ANTENNA;
182 if (!conf->antenna_sel_tx &&
183 default_ant->tx != ANTENNA_SW_DIVERSITY &&
184 default_ant->tx != active_ant->tx)
185 flags |= CONFIG_UPDATE_ANTENNA;
186 else if (conf->antenna_sel_tx &&
187 conf->antenna_sel_tx != active_ant->tx)
188 flags |= CONFIG_UPDATE_ANTENNA;
189 else if (active_ant->tx == ANTENNA_SW_DIVERSITY)
190 flags |= CONFIG_UPDATE_ANTENNA;
193 * The following configuration options are never
194 * stored anywhere and will always be updated.
196 flags |= CONFIG_UPDATE_SLOT_TIME;
197 flags |= CONFIG_UPDATE_BEACON_INT;
200 * We have determined what options should be updated,
201 * now precalculate device configuration values depending
202 * on what configuration options need to be updated.
205 memset(&libconf, 0, sizeof(libconf));
207 if (flags & CONFIG_UPDATE_PHYMODE) {
208 switch (conf->phymode) {
209 case MODE_IEEE80211A:
210 libconf.phymode = HWMODE_A;
212 case MODE_IEEE80211B:
213 libconf.phymode = HWMODE_B;
215 case MODE_IEEE80211G:
216 libconf.phymode = HWMODE_G;
220 "Attempt to configure unsupported mode (%d)"
221 "Defaulting to 802.11b", conf->phymode);
222 libconf.phymode = HWMODE_B;
225 mode = &rt2x00dev->hwmodes[libconf.phymode];
226 rate = &mode->rates[mode->num_rates - 1];
228 libconf.basic_rates =
229 DEVICE_GET_RATE_FIELD(rate->val, RATEMASK) & DEV_BASIC_RATEMASK;
232 if (flags & CONFIG_UPDATE_CHANNEL) {
234 &rt2x00dev->spec.channels[conf->channel_val],
238 if (flags & CONFIG_UPDATE_ANTENNA) {
239 if (conf->antenna_sel_rx)
240 libconf.ant.rx = conf->antenna_sel_rx;
241 else if (default_ant->rx != ANTENNA_SW_DIVERSITY)
242 libconf.ant.rx = default_ant->rx;
243 else if (active_ant->rx == ANTENNA_SW_DIVERSITY)
244 libconf.ant.rx = ANTENNA_B;
246 if (conf->antenna_sel_tx)
247 libconf.ant.tx = conf->antenna_sel_tx;
248 else if (default_ant->tx != ANTENNA_SW_DIVERSITY)
249 libconf.ant.tx = default_ant->tx;
250 else if (active_ant->tx == ANTENNA_SW_DIVERSITY)
251 libconf.ant.tx = ANTENNA_B;
254 if (flags & CONFIG_UPDATE_SLOT_TIME) {
255 short_slot_time = conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME;
258 short_slot_time ? SHORT_SLOT_TIME : SLOT_TIME;
260 libconf.pifs = short_slot_time ? SHORT_PIFS : PIFS;
261 libconf.difs = short_slot_time ? SHORT_DIFS : DIFS;
268 * Start configuration.
270 rt2x00dev->ops->lib->config(rt2x00dev, flags, &libconf);
273 * Some configuration changes affect the link quality
274 * which means we need to reset the link tuner.
276 if (flags & (CONFIG_UPDATE_CHANNEL | CONFIG_UPDATE_ANTENNA))
277 rt2x00lib_reset_link_tuner(rt2x00dev);
279 if (flags & CONFIG_UPDATE_PHYMODE) {
280 rt2x00dev->curr_hwmode = libconf.phymode;
281 rt2x00dev->rx_status.phymode = conf->phymode;
284 rt2x00dev->rx_status.freq = conf->freq;
285 rt2x00dev->rx_status.channel = conf->channel;
286 rt2x00dev->tx_power = conf->power_level;
288 if (flags & CONFIG_UPDATE_ANTENNA) {
289 rt2x00dev->link.ant.active.rx = libconf.ant.rx;
290 rt2x00dev->link.ant.active.tx = libconf.ant.tx;