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 * Write new antenna setup to device and reset the link tuner.
107 * The latter is required since we need to recalibrate the
108 * noise-sensitivity ratio for the new setup.
110 rt2x00dev->ops->lib->config(rt2x00dev, CONFIG_UPDATE_ANTENNA, &libconf);
111 rt2x00lib_reset_link_tuner(rt2x00dev);
113 rt2x00dev->link.ant.active.rx = libconf.ant.rx;
114 rt2x00dev->link.ant.active.tx = libconf.ant.tx;
117 void rt2x00lib_config(struct rt2x00_dev *rt2x00dev,
118 struct ieee80211_conf *conf, const int force_config)
120 struct rt2x00lib_conf libconf;
121 struct ieee80211_hw_mode *mode;
122 struct ieee80211_rate *rate;
123 struct antenna_setup *default_ant = &rt2x00dev->default_ant;
124 struct antenna_setup *active_ant = &rt2x00dev->link.ant.active;
129 * In some situations we want to force all configurations
130 * to be reloaded (When resuming for instance).
133 flags = CONFIG_UPDATE_ALL;
138 * Check which configuration options have been
139 * updated and should be send to the device.
141 if (rt2x00dev->rx_status.phymode != conf->phymode)
142 flags |= CONFIG_UPDATE_PHYMODE;
143 if (rt2x00dev->rx_status.channel != conf->channel)
144 flags |= CONFIG_UPDATE_CHANNEL;
145 if (rt2x00dev->tx_power != conf->power_level)
146 flags |= CONFIG_UPDATE_TXPOWER;
149 * Determining changes in the antenna setups request several checks:
150 * antenna_sel_{r,t}x = 0
151 * -> Does active_{r,t}x match default_{r,t}x
152 * -> Is default_{r,t}x SW_DIVERSITY
153 * antenna_sel_{r,t}x = 1/2
154 * -> Does active_{r,t}x match antenna_sel_{r,t}x
155 * The reason for not updating the antenna while SW diversity
156 * should be used is simple: Software diversity means that
157 * we should switch between the antenna's based on the
158 * quality. This means that the current antenna is good enough
159 * to work with untill the link tuner decides that an antenna
160 * switch should be performed.
162 if (!conf->antenna_sel_rx &&
163 default_ant->rx != ANTENNA_SW_DIVERSITY &&
164 default_ant->rx != active_ant->rx)
165 flags |= CONFIG_UPDATE_ANTENNA;
166 else if (conf->antenna_sel_rx &&
167 conf->antenna_sel_rx != active_ant->rx)
168 flags |= CONFIG_UPDATE_ANTENNA;
170 if (!conf->antenna_sel_tx &&
171 default_ant->tx != ANTENNA_SW_DIVERSITY &&
172 default_ant->tx != active_ant->tx)
173 flags |= CONFIG_UPDATE_ANTENNA;
174 else if (conf->antenna_sel_tx &&
175 conf->antenna_sel_tx != active_ant->tx)
176 flags |= CONFIG_UPDATE_ANTENNA;
179 * The following configuration options are never
180 * stored anywhere and will always be updated.
182 flags |= CONFIG_UPDATE_SLOT_TIME;
183 flags |= CONFIG_UPDATE_BEACON_INT;
186 * We have determined what options should be updated,
187 * now precalculate device configuration values depending
188 * on what configuration options need to be updated.
191 memset(&libconf, 0, sizeof(libconf));
193 if (flags & CONFIG_UPDATE_PHYMODE) {
194 switch (conf->phymode) {
195 case MODE_IEEE80211A:
196 libconf.phymode = HWMODE_A;
198 case MODE_IEEE80211B:
199 libconf.phymode = HWMODE_B;
201 case MODE_IEEE80211G:
202 libconf.phymode = HWMODE_G;
206 "Attempt to configure unsupported mode (%d)"
207 "Defaulting to 802.11b", conf->phymode);
208 libconf.phymode = HWMODE_B;
211 mode = &rt2x00dev->hwmodes[libconf.phymode];
212 rate = &mode->rates[mode->num_rates - 1];
214 libconf.basic_rates =
215 DEVICE_GET_RATE_FIELD(rate->val, RATEMASK) & DEV_BASIC_RATEMASK;
218 if (flags & CONFIG_UPDATE_CHANNEL) {
220 &rt2x00dev->spec.channels[conf->channel_val],
224 if (flags & CONFIG_UPDATE_ANTENNA) {
225 if (conf->antenna_sel_rx)
226 libconf.ant.rx = conf->antenna_sel_rx;
227 else if (default_ant->rx != ANTENNA_SW_DIVERSITY)
228 libconf.ant.rx = default_ant->rx;
229 else if (active_ant->rx == ANTENNA_SW_DIVERSITY)
230 libconf.ant.rx = ANTENNA_B;
232 if (conf->antenna_sel_tx)
233 libconf.ant.tx = conf->antenna_sel_tx;
234 else if (default_ant->tx != ANTENNA_SW_DIVERSITY)
235 libconf.ant.tx = default_ant->tx;
236 else if (active_ant->tx == ANTENNA_SW_DIVERSITY)
237 libconf.ant.tx = ANTENNA_B;
240 if (flags & CONFIG_UPDATE_SLOT_TIME) {
241 short_slot_time = conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME;
244 short_slot_time ? SHORT_SLOT_TIME : SLOT_TIME;
246 libconf.pifs = short_slot_time ? SHORT_PIFS : PIFS;
247 libconf.difs = short_slot_time ? SHORT_DIFS : DIFS;
254 * Start configuration.
256 rt2x00dev->ops->lib->config(rt2x00dev, flags, &libconf);
259 * Some configuration changes affect the link quality
260 * which means we need to reset the link tuner.
262 if (flags & (CONFIG_UPDATE_CHANNEL | CONFIG_UPDATE_ANTENNA))
263 rt2x00lib_reset_link_tuner(rt2x00dev);
265 rt2x00dev->curr_hwmode = libconf.phymode;
266 rt2x00dev->rx_status.phymode = conf->phymode;
267 rt2x00dev->rx_status.freq = conf->freq;
268 rt2x00dev->rx_status.channel = conf->channel;
269 rt2x00dev->tx_power = conf->power_level;
270 rt2x00dev->link.ant.active.rx = libconf.ant.rx;
271 rt2x00dev->link.ant.active.tx = libconf.ant.tx;