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, write to the
17 Free Software Foundation, Inc.,
18 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19 */
20
21 /*
22 Module: rt2x00lib
23 Abstract: rt2x00 generic configuration routines.
24 */
25
26 #include <linux/kernel.h>
27 #include <linux/module.h>
28
29 #include "rt2x00.h"
30 #include "rt2x00lib.h"
31
rt2x00lib_config_intf(struct rt2x00_dev * rt2x00dev,struct rt2x00_intf * intf,enum nl80211_iftype type,const u8 * mac,const u8 * bssid)32 void rt2x00lib_config_intf(struct rt2x00_dev *rt2x00dev,
33 struct rt2x00_intf *intf,
34 enum nl80211_iftype type,
35 const u8 *mac, const u8 *bssid)
36 {
37 struct rt2x00intf_conf conf;
38 unsigned int flags = 0;
39
40 conf.type = type;
41
42 switch (type) {
43 case NL80211_IFTYPE_ADHOC:
44 conf.sync = TSF_SYNC_ADHOC;
45 break;
46 case NL80211_IFTYPE_AP:
47 case NL80211_IFTYPE_MESH_POINT:
48 case NL80211_IFTYPE_WDS:
49 conf.sync = TSF_SYNC_AP_NONE;
50 break;
51 case NL80211_IFTYPE_STATION:
52 conf.sync = TSF_SYNC_INFRA;
53 break;
54 default:
55 conf.sync = TSF_SYNC_NONE;
56 break;
57 }
58
59 /*
60 * Note that when NULL is passed as address we will send
61 * 00:00:00:00:00 to the device to clear the address.
62 * This will prevent the device being confused when it wants
63 * to ACK frames or considers itself associated.
64 */
65 memset(conf.mac, 0, sizeof(conf.mac));
66 if (mac)
67 memcpy(conf.mac, mac, ETH_ALEN);
68
69 memset(conf.bssid, 0, sizeof(conf.bssid));
70 if (bssid)
71 memcpy(conf.bssid, bssid, ETH_ALEN);
72
73 flags |= CONFIG_UPDATE_TYPE;
74 if (mac || (!rt2x00dev->intf_ap_count && !rt2x00dev->intf_sta_count))
75 flags |= CONFIG_UPDATE_MAC;
76 if (bssid || (!rt2x00dev->intf_ap_count && !rt2x00dev->intf_sta_count))
77 flags |= CONFIG_UPDATE_BSSID;
78
79 rt2x00dev->ops->lib->config_intf(rt2x00dev, intf, &conf, flags);
80 }
81
rt2x00lib_config_erp(struct rt2x00_dev * rt2x00dev,struct rt2x00_intf * intf,struct ieee80211_bss_conf * bss_conf,u32 changed)82 void rt2x00lib_config_erp(struct rt2x00_dev *rt2x00dev,
83 struct rt2x00_intf *intf,
84 struct ieee80211_bss_conf *bss_conf,
85 u32 changed)
86 {
87 struct rt2x00lib_erp erp;
88
89 memset(&erp, 0, sizeof(erp));
90
91 erp.short_preamble = bss_conf->use_short_preamble;
92 erp.cts_protection = bss_conf->use_cts_prot;
93
94 erp.slot_time = bss_conf->use_short_slot ? SHORT_SLOT_TIME : SLOT_TIME;
95 erp.sifs = SIFS;
96 erp.pifs = bss_conf->use_short_slot ? SHORT_PIFS : PIFS;
97 erp.difs = bss_conf->use_short_slot ? SHORT_DIFS : DIFS;
98 erp.eifs = bss_conf->use_short_slot ? SHORT_EIFS : EIFS;
99
100 erp.basic_rates = bss_conf->basic_rates;
101 erp.beacon_int = bss_conf->beacon_int;
102
103 /* Update global beacon interval time, this is needed for PS support */
104 rt2x00dev->beacon_int = bss_conf->beacon_int;
105
106 if (changed & BSS_CHANGED_HT)
107 erp.ht_opmode = bss_conf->ht_operation_mode;
108
109 rt2x00dev->ops->lib->config_erp(rt2x00dev, &erp, changed);
110 }
111
112 static inline
rt2x00lib_config_antenna_check(enum antenna current_ant,enum antenna default_ant)113 enum antenna rt2x00lib_config_antenna_check(enum antenna current_ant,
114 enum antenna default_ant)
115 {
116 if (current_ant != ANTENNA_SW_DIVERSITY)
117 return current_ant;
118 return (default_ant != ANTENNA_SW_DIVERSITY) ? default_ant : ANTENNA_B;
119 }
120
rt2x00lib_config_antenna(struct rt2x00_dev * rt2x00dev,struct antenna_setup config)121 void rt2x00lib_config_antenna(struct rt2x00_dev *rt2x00dev,
122 struct antenna_setup config)
123 {
124 struct link_ant *ant = &rt2x00dev->link.ant;
125 struct antenna_setup *def = &rt2x00dev->default_ant;
126 struct antenna_setup *active = &rt2x00dev->link.ant.active;
127
128 /*
129 * Failsafe: Make sure we are not sending the
130 * ANTENNA_SW_DIVERSITY state to the driver.
131 * If that happens, fallback to hardware defaults,
132 * or our own default.
133 */
134 if (!(ant->flags & ANTENNA_RX_DIVERSITY))
135 config.rx = rt2x00lib_config_antenna_check(config.rx, def->rx);
136 else if (config.rx == ANTENNA_SW_DIVERSITY)
137 config.rx = active->rx;
138
139 if (!(ant->flags & ANTENNA_TX_DIVERSITY))
140 config.tx = rt2x00lib_config_antenna_check(config.tx, def->tx);
141 else if (config.tx == ANTENNA_SW_DIVERSITY)
142 config.tx = active->tx;
143
144 /*
145 * Antenna setup changes require the RX to be disabled,
146 * else the changes will be ignored by the device.
147 */
148 if (test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
149 rt2x00queue_stop_queue(rt2x00dev->rx);
150
151 /*
152 * Write new antenna setup to device and reset the link tuner.
153 * The latter is required since we need to recalibrate the
154 * noise-sensitivity ratio for the new setup.
155 */
156 rt2x00dev->ops->lib->config_ant(rt2x00dev, &config);
157
158 rt2x00link_reset_tuner(rt2x00dev, true);
159
160 memcpy(active, &config, sizeof(config));
161
162 if (test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
163 rt2x00queue_start_queue(rt2x00dev->rx);
164 }
165
rt2x00lib_config(struct rt2x00_dev * rt2x00dev,struct ieee80211_conf * conf,unsigned int ieee80211_flags)166 void rt2x00lib_config(struct rt2x00_dev *rt2x00dev,
167 struct ieee80211_conf *conf,
168 unsigned int ieee80211_flags)
169 {
170 struct rt2x00lib_conf libconf;
171 u16 hw_value;
172
173 memset(&libconf, 0, sizeof(libconf));
174
175 libconf.conf = conf;
176
177 if (ieee80211_flags & IEEE80211_CONF_CHANGE_CHANNEL) {
178 if (conf_is_ht40(conf)) {
179 __set_bit(CONFIG_CHANNEL_HT40, &rt2x00dev->flags);
180 hw_value = rt2x00ht_center_channel(rt2x00dev, conf);
181 } else {
182 __clear_bit(CONFIG_CHANNEL_HT40, &rt2x00dev->flags);
183 hw_value = conf->channel->hw_value;
184 }
185
186 memcpy(&libconf.rf,
187 &rt2x00dev->spec.channels[hw_value],
188 sizeof(libconf.rf));
189
190 memcpy(&libconf.channel,
191 &rt2x00dev->spec.channels_info[hw_value],
192 sizeof(libconf.channel));
193 }
194
195 /*
196 * Start configuration.
197 */
198 rt2x00dev->ops->lib->config(rt2x00dev, &libconf, ieee80211_flags);
199
200 /*
201 * Some configuration changes affect the link quality
202 * which means we need to reset the link tuner.
203 */
204 if (ieee80211_flags & IEEE80211_CONF_CHANGE_CHANNEL)
205 rt2x00link_reset_tuner(rt2x00dev, false);
206
207 rt2x00dev->curr_band = conf->channel->band;
208 rt2x00dev->curr_freq = conf->channel->center_freq;
209 rt2x00dev->tx_power = conf->power_level;
210 rt2x00dev->short_retry = conf->short_frame_max_tx_count;
211 rt2x00dev->long_retry = conf->long_frame_max_tx_count;
212 }
213