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_preamble(struct rt2x00_dev
*rt2x00dev
,
79 struct rt2x00_intf
*intf
,
80 const unsigned int short_preamble
)
86 ack_timeout
= PLCP
+ get_duration(ACK_SIZE
, 10);
87 ack_consume_time
= SIFS
+ PLCP
+ get_duration(ACK_SIZE
, 10);
89 if (rt2x00dev
->hw
->conf
.flags
& IEEE80211_CONF_SHORT_SLOT_TIME
)
90 ack_timeout
+= SHORT_DIFS
;
95 ack_timeout
+= SHORT_PREAMBLE
;
96 ack_consume_time
+= SHORT_PREAMBLE
;
98 ack_timeout
+= PREAMBLE
;
99 ack_consume_time
+= PREAMBLE
;
102 retval
= rt2x00dev
->ops
->lib
->config_preamble(rt2x00dev
,
107 spin_lock(&intf
->lock
);
110 intf
->delayed_flags
|= DELAYED_CONFIG_PREAMBLE
;
111 queue_work(rt2x00dev
->hw
->workqueue
, &rt2x00dev
->intf_work
);
114 spin_unlock(&intf
->lock
);
117 void rt2x00lib_config_antenna(struct rt2x00_dev
*rt2x00dev
,
118 enum antenna rx
, enum antenna tx
)
120 struct rt2x00lib_conf libconf
;
125 if (rx
== rt2x00dev
->link
.ant
.active
.rx
&&
126 tx
== rt2x00dev
->link
.ant
.active
.tx
)
130 * Antenna setup changes require the RX to be disabled,
131 * else the changes will be ignored by the device.
133 if (test_bit(DEVICE_ENABLED_RADIO
, &rt2x00dev
->flags
))
134 rt2x00lib_toggle_rx(rt2x00dev
, STATE_RADIO_RX_OFF_LINK
);
137 * Write new antenna setup to device and reset the link tuner.
138 * The latter is required since we need to recalibrate the
139 * noise-sensitivity ratio for the new setup.
141 rt2x00dev
->ops
->lib
->config(rt2x00dev
, &libconf
, CONFIG_UPDATE_ANTENNA
);
142 rt2x00lib_reset_link_tuner(rt2x00dev
);
144 rt2x00dev
->link
.ant
.active
.rx
= libconf
.ant
.rx
;
145 rt2x00dev
->link
.ant
.active
.tx
= libconf
.ant
.tx
;
147 if (test_bit(DEVICE_ENABLED_RADIO
, &rt2x00dev
->flags
))
148 rt2x00lib_toggle_rx(rt2x00dev
, STATE_RADIO_RX_ON_LINK
);
151 void rt2x00lib_config(struct rt2x00_dev
*rt2x00dev
,
152 struct ieee80211_conf
*conf
, const int force_config
)
154 struct rt2x00lib_conf libconf
;
155 struct ieee80211_hw_mode
*mode
;
156 struct ieee80211_rate
*rate
;
157 struct antenna_setup
*default_ant
= &rt2x00dev
->default_ant
;
158 struct antenna_setup
*active_ant
= &rt2x00dev
->link
.ant
.active
;
163 * In some situations we want to force all configurations
164 * to be reloaded (When resuming for instance).
167 flags
= CONFIG_UPDATE_ALL
;
172 * Check which configuration options have been
173 * updated and should be send to the device.
175 if (rt2x00dev
->rx_status
.phymode
!= conf
->phymode
)
176 flags
|= CONFIG_UPDATE_PHYMODE
;
177 if (rt2x00dev
->rx_status
.channel
!= conf
->channel
)
178 flags
|= CONFIG_UPDATE_CHANNEL
;
179 if (rt2x00dev
->tx_power
!= conf
->power_level
)
180 flags
|= CONFIG_UPDATE_TXPOWER
;
183 * Determining changes in the antenna setups request several checks:
184 * antenna_sel_{r,t}x = 0
185 * -> Does active_{r,t}x match default_{r,t}x
186 * -> Is default_{r,t}x SW_DIVERSITY
187 * antenna_sel_{r,t}x = 1/2
188 * -> Does active_{r,t}x match antenna_sel_{r,t}x
189 * The reason for not updating the antenna while SW diversity
190 * should be used is simple: Software diversity means that
191 * we should switch between the antenna's based on the
192 * quality. This means that the current antenna is good enough
193 * to work with untill the link tuner decides that an antenna
194 * switch should be performed.
196 if (!conf
->antenna_sel_rx
&&
197 default_ant
->rx
!= ANTENNA_SW_DIVERSITY
&&
198 default_ant
->rx
!= active_ant
->rx
)
199 flags
|= CONFIG_UPDATE_ANTENNA
;
200 else if (conf
->antenna_sel_rx
&&
201 conf
->antenna_sel_rx
!= active_ant
->rx
)
202 flags
|= CONFIG_UPDATE_ANTENNA
;
203 else if (active_ant
->rx
== ANTENNA_SW_DIVERSITY
)
204 flags
|= CONFIG_UPDATE_ANTENNA
;
206 if (!conf
->antenna_sel_tx
&&
207 default_ant
->tx
!= ANTENNA_SW_DIVERSITY
&&
208 default_ant
->tx
!= active_ant
->tx
)
209 flags
|= CONFIG_UPDATE_ANTENNA
;
210 else if (conf
->antenna_sel_tx
&&
211 conf
->antenna_sel_tx
!= active_ant
->tx
)
212 flags
|= CONFIG_UPDATE_ANTENNA
;
213 else if (active_ant
->tx
== ANTENNA_SW_DIVERSITY
)
214 flags
|= CONFIG_UPDATE_ANTENNA
;
217 * The following configuration options are never
218 * stored anywhere and will always be updated.
220 flags
|= CONFIG_UPDATE_SLOT_TIME
;
221 flags
|= CONFIG_UPDATE_BEACON_INT
;
224 * We have determined what options should be updated,
225 * now precalculate device configuration values depending
226 * on what configuration options need to be updated.
229 memset(&libconf
, 0, sizeof(libconf
));
231 if (flags
& CONFIG_UPDATE_PHYMODE
) {
232 switch (conf
->phymode
) {
233 case MODE_IEEE80211A
:
234 libconf
.phymode
= HWMODE_A
;
236 case MODE_IEEE80211B
:
237 libconf
.phymode
= HWMODE_B
;
239 case MODE_IEEE80211G
:
240 libconf
.phymode
= HWMODE_G
;
244 "Attempt to configure unsupported mode (%d)"
245 "Defaulting to 802.11b", conf
->phymode
);
246 libconf
.phymode
= HWMODE_B
;
249 mode
= &rt2x00dev
->hwmodes
[libconf
.phymode
];
250 rate
= &mode
->rates
[mode
->num_rates
- 1];
252 libconf
.basic_rates
=
253 DEVICE_GET_RATE_FIELD(rate
->val
, RATEMASK
) & DEV_BASIC_RATEMASK
;
256 if (flags
& CONFIG_UPDATE_CHANNEL
) {
258 &rt2x00dev
->spec
.channels
[conf
->channel_val
],
262 if (flags
& CONFIG_UPDATE_ANTENNA
) {
263 if (conf
->antenna_sel_rx
)
264 libconf
.ant
.rx
= conf
->antenna_sel_rx
;
265 else if (default_ant
->rx
!= ANTENNA_SW_DIVERSITY
)
266 libconf
.ant
.rx
= default_ant
->rx
;
267 else if (active_ant
->rx
== ANTENNA_SW_DIVERSITY
)
268 libconf
.ant
.rx
= ANTENNA_B
;
270 if (conf
->antenna_sel_tx
)
271 libconf
.ant
.tx
= conf
->antenna_sel_tx
;
272 else if (default_ant
->tx
!= ANTENNA_SW_DIVERSITY
)
273 libconf
.ant
.tx
= default_ant
->tx
;
274 else if (active_ant
->tx
== ANTENNA_SW_DIVERSITY
)
275 libconf
.ant
.tx
= ANTENNA_B
;
278 if (flags
& CONFIG_UPDATE_SLOT_TIME
) {
279 short_slot_time
= conf
->flags
& IEEE80211_CONF_SHORT_SLOT_TIME
;
282 short_slot_time
? SHORT_SLOT_TIME
: SLOT_TIME
;
284 libconf
.pifs
= short_slot_time
? SHORT_PIFS
: PIFS
;
285 libconf
.difs
= short_slot_time
? SHORT_DIFS
: DIFS
;
292 * Start configuration.
294 rt2x00dev
->ops
->lib
->config(rt2x00dev
, &libconf
, flags
);
297 * Some configuration changes affect the link quality
298 * which means we need to reset the link tuner.
300 if (flags
& (CONFIG_UPDATE_CHANNEL
| CONFIG_UPDATE_ANTENNA
))
301 rt2x00lib_reset_link_tuner(rt2x00dev
);
303 if (flags
& CONFIG_UPDATE_PHYMODE
) {
304 rt2x00dev
->curr_hwmode
= libconf
.phymode
;
305 rt2x00dev
->rx_status
.phymode
= conf
->phymode
;
308 rt2x00dev
->rx_status
.freq
= conf
->freq
;
309 rt2x00dev
->rx_status
.channel
= conf
->channel
;
310 rt2x00dev
->tx_power
= conf
->power_level
;
312 if (flags
& CONFIG_UPDATE_ANTENNA
) {
313 rt2x00dev
->link
.ant
.active
.rx
= libconf
.ant
.rx
;
314 rt2x00dev
->link
.ant
.active
.tx
= libconf
.ant
.tx
;