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1/*
2 Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com>
3 <http://rt2x00.serialmonkey.com>
4
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.
9
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.
14
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, see <http://www.gnu.org/licenses/>.
17 */
18
19/*
20 Module: rt2x00lib
21 Abstract: rt2x00 generic configuration routines.
22 */
23
24#include <linux/kernel.h>
25#include <linux/module.h>
26
27#include "rt2x00.h"
28#include "rt2x00lib.h"
29
30void rt2x00lib_config_intf(struct rt2x00_dev *rt2x00dev,
31 struct rt2x00_intf *intf,
32 enum nl80211_iftype type,
33 const u8 *mac, const u8 *bssid)
34{
35 struct rt2x00intf_conf conf;
36 unsigned int flags = 0;
37
38 conf.type = type;
39
40 switch (type) {
41 case NL80211_IFTYPE_ADHOC:
42 conf.sync = TSF_SYNC_ADHOC;
43 break;
44 case NL80211_IFTYPE_AP:
45 case NL80211_IFTYPE_MESH_POINT:
46 case NL80211_IFTYPE_WDS:
47 conf.sync = TSF_SYNC_AP_NONE;
48 break;
49 case NL80211_IFTYPE_STATION:
50 conf.sync = TSF_SYNC_INFRA;
51 break;
52 default:
53 conf.sync = TSF_SYNC_NONE;
54 break;
55 }
56
57 /*
58 * Note that when NULL is passed as address we will send
59 * 00:00:00:00:00 to the device to clear the address.
60 * This will prevent the device being confused when it wants
61 * to ACK frames or considers itself associated.
62 */
63 memset(conf.mac, 0, sizeof(conf.mac));
64 if (mac)
65 memcpy(conf.mac, mac, ETH_ALEN);
66
67 memset(conf.bssid, 0, sizeof(conf.bssid));
68 if (bssid)
69 memcpy(conf.bssid, bssid, ETH_ALEN);
70
71 flags |= CONFIG_UPDATE_TYPE;
72 if (mac || (!rt2x00dev->intf_ap_count && !rt2x00dev->intf_sta_count))
73 flags |= CONFIG_UPDATE_MAC;
74 if (bssid || (!rt2x00dev->intf_ap_count && !rt2x00dev->intf_sta_count))
75 flags |= CONFIG_UPDATE_BSSID;
76
77 rt2x00dev->ops->lib->config_intf(rt2x00dev, intf, &conf, flags);
78}
79
80void rt2x00lib_config_erp(struct rt2x00_dev *rt2x00dev,
81 struct rt2x00_intf *intf,
82 struct ieee80211_bss_conf *bss_conf,
83 u32 changed)
84{
85 struct rt2x00lib_erp erp;
86
87 memset(&erp, 0, sizeof(erp));
88
89 erp.short_preamble = bss_conf->use_short_preamble;
90 erp.cts_protection = bss_conf->use_cts_prot;
91
92 erp.slot_time = bss_conf->use_short_slot ? SHORT_SLOT_TIME : SLOT_TIME;
93 erp.sifs = SIFS;
94 erp.pifs = bss_conf->use_short_slot ? SHORT_PIFS : PIFS;
95 erp.difs = bss_conf->use_short_slot ? SHORT_DIFS : DIFS;
96 erp.eifs = bss_conf->use_short_slot ? SHORT_EIFS : EIFS;
97
98 erp.basic_rates = bss_conf->basic_rates;
99 erp.beacon_int = bss_conf->beacon_int;
100
101 /* Update the AID, this is needed for dynamic PS support */
102 rt2x00dev->aid = bss_conf->assoc ? bss_conf->aid : 0;
103 rt2x00dev->last_beacon = bss_conf->sync_tsf;
104
105 /* Update global beacon interval time, this is needed for PS support */
106 rt2x00dev->beacon_int = bss_conf->beacon_int;
107
108 if (changed & BSS_CHANGED_HT)
109 erp.ht_opmode = bss_conf->ht_operation_mode;
110
111 rt2x00dev->ops->lib->config_erp(rt2x00dev, &erp, changed);
112}
113
114void rt2x00lib_config_antenna(struct rt2x00_dev *rt2x00dev,
115 struct antenna_setup config)
116{
117 struct link_ant *ant = &rt2x00dev->link.ant;
118 struct antenna_setup *def = &rt2x00dev->default_ant;
119 struct antenna_setup *active = &rt2x00dev->link.ant.active;
120
121 /*
122 * When the caller tries to send the SW diversity,
123 * we must update the ANTENNA_RX_DIVERSITY flag to
124 * enable the antenna diversity in the link tuner.
125 *
126 * Secondly, we must guarentee we never send the
127 * software antenna diversity command to the driver.
128 */
129 if (!(ant->flags & ANTENNA_RX_DIVERSITY)) {
130 if (config.rx == ANTENNA_SW_DIVERSITY) {
131 ant->flags |= ANTENNA_RX_DIVERSITY;
132
133 if (def->rx == ANTENNA_SW_DIVERSITY)
134 config.rx = ANTENNA_B;
135 else
136 config.rx = def->rx;
137 }
138 } else if (config.rx == ANTENNA_SW_DIVERSITY)
139 config.rx = active->rx;
140
141 if (!(ant->flags & ANTENNA_TX_DIVERSITY)) {
142 if (config.tx == ANTENNA_SW_DIVERSITY) {
143 ant->flags |= ANTENNA_TX_DIVERSITY;
144
145 if (def->tx == ANTENNA_SW_DIVERSITY)
146 config.tx = ANTENNA_B;
147 else
148 config.tx = def->tx;
149 }
150 } else if (config.tx == ANTENNA_SW_DIVERSITY)
151 config.tx = active->tx;
152
153 /*
154 * Antenna setup changes require the RX to be disabled,
155 * else the changes will be ignored by the device.
156 */
157 if (test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
158 rt2x00queue_stop_queue(rt2x00dev->rx);
159
160 /*
161 * Write new antenna setup to device and reset the link tuner.
162 * The latter is required since we need to recalibrate the
163 * noise-sensitivity ratio for the new setup.
164 */
165 rt2x00dev->ops->lib->config_ant(rt2x00dev, &config);
166
167 rt2x00link_reset_tuner(rt2x00dev, true);
168
169 memcpy(active, &config, sizeof(config));
170
171 if (test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
172 rt2x00queue_start_queue(rt2x00dev->rx);
173}
174
175static u16 rt2x00ht_center_channel(struct rt2x00_dev *rt2x00dev,
176 struct ieee80211_conf *conf)
177{
178 struct hw_mode_spec *spec = &rt2x00dev->spec;
179 int center_channel;
180 u16 i;
181
182 /*
183 * Initialize center channel to current channel.
184 */
185 center_channel = spec->channels[conf->chandef.chan->hw_value].channel;
186
187 /*
188 * Adjust center channel to HT40+ and HT40- operation.
189 */
190 if (conf_is_ht40_plus(conf))
191 center_channel += 2;
192 else if (conf_is_ht40_minus(conf))
193 center_channel -= (center_channel == 14) ? 1 : 2;
194
195 for (i = 0; i < spec->num_channels; i++)
196 if (spec->channels[i].channel == center_channel)
197 return i;
198
199 WARN_ON(1);
200 return conf->chandef.chan->hw_value;
201}
202
203void rt2x00lib_config(struct rt2x00_dev *rt2x00dev,
204 struct ieee80211_conf *conf,
205 unsigned int ieee80211_flags)
206{
207 struct rt2x00lib_conf libconf;
208 u16 hw_value;
209 u16 autowake_timeout;
210 u16 beacon_int;
211 u16 beacon_diff;
212
213 memset(&libconf, 0, sizeof(libconf));
214
215 libconf.conf = conf;
216
217 if (ieee80211_flags & IEEE80211_CONF_CHANGE_CHANNEL) {
218 if (!conf_is_ht(conf))
219 set_bit(CONFIG_HT_DISABLED, &rt2x00dev->flags);
220 else
221 clear_bit(CONFIG_HT_DISABLED, &rt2x00dev->flags);
222
223 if (conf_is_ht40(conf)) {
224 set_bit(CONFIG_CHANNEL_HT40, &rt2x00dev->flags);
225 hw_value = rt2x00ht_center_channel(rt2x00dev, conf);
226 } else {
227 clear_bit(CONFIG_CHANNEL_HT40, &rt2x00dev->flags);
228 hw_value = conf->chandef.chan->hw_value;
229 }
230
231 memcpy(&libconf.rf,
232 &rt2x00dev->spec.channels[hw_value],
233 sizeof(libconf.rf));
234
235 memcpy(&libconf.channel,
236 &rt2x00dev->spec.channels_info[hw_value],
237 sizeof(libconf.channel));
238
239 /* Used for VCO periodic calibration */
240 rt2x00dev->rf_channel = libconf.rf.channel;
241 }
242
243 if (test_bit(REQUIRE_PS_AUTOWAKE, &rt2x00dev->cap_flags) &&
244 (ieee80211_flags & IEEE80211_CONF_CHANGE_PS))
245 cancel_delayed_work_sync(&rt2x00dev->autowakeup_work);
246
247 /*
248 * Start configuration.
249 */
250 rt2x00dev->ops->lib->config(rt2x00dev, &libconf, ieee80211_flags);
251
252 /*
253 * Some configuration changes affect the link quality
254 * which means we need to reset the link tuner.
255 */
256 if (ieee80211_flags & IEEE80211_CONF_CHANGE_CHANNEL)
257 rt2x00link_reset_tuner(rt2x00dev, false);
258
259 if (test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags) &&
260 test_bit(REQUIRE_PS_AUTOWAKE, &rt2x00dev->cap_flags) &&
261 (ieee80211_flags & IEEE80211_CONF_CHANGE_PS) &&
262 (conf->flags & IEEE80211_CONF_PS)) {
263 beacon_diff = (long)jiffies - (long)rt2x00dev->last_beacon;
264 beacon_int = msecs_to_jiffies(rt2x00dev->beacon_int);
265
266 if (beacon_diff > beacon_int)
267 beacon_diff = 0;
268
269 autowake_timeout = (conf->max_sleep_period * beacon_int) - beacon_diff;
270 queue_delayed_work(rt2x00dev->workqueue,
271 &rt2x00dev->autowakeup_work,
272 autowake_timeout - 15);
273 }
274
275 if (conf->flags & IEEE80211_CONF_PS)
276 set_bit(CONFIG_POWERSAVING, &rt2x00dev->flags);
277 else
278 clear_bit(CONFIG_POWERSAVING, &rt2x00dev->flags);
279
280 rt2x00dev->curr_band = conf->chandef.chan->band;
281 rt2x00dev->curr_freq = conf->chandef.chan->center_freq;
282 rt2x00dev->tx_power = conf->power_level;
283 rt2x00dev->short_retry = conf->short_frame_max_tx_count;
284 rt2x00dev->long_retry = conf->long_frame_max_tx_count;
285}