tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
32void 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 case NL80211_IFTYPE_AP:
45 case NL80211_IFTYPE_MESH_POINT:
46 case NL80211_IFTYPE_WDS:
47 conf.sync = TSF_SYNC_BEACON;
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 consideres 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{
84 struct rt2x00lib_erp erp;
85
86 memset(&erp, 0, sizeof(erp));
87
88 erp.short_preamble = bss_conf->use_short_preamble;
89 erp.cts_protection = bss_conf->use_cts_prot;
90
91 erp.slot_time = bss_conf->use_short_slot ? SHORT_SLOT_TIME : SLOT_TIME;
92 erp.sifs = SIFS;
93 erp.pifs = bss_conf->use_short_slot ? SHORT_PIFS : PIFS;
94 erp.difs = bss_conf->use_short_slot ? SHORT_DIFS : DIFS;
95 erp.eifs = bss_conf->use_short_slot ? SHORT_EIFS : EIFS;
96
97 erp.basic_rates = bss_conf->basic_rates;
98 erp.beacon_int = bss_conf->beacon_int;
99
100 /* Update global beacon interval time, this is needed for PS support */
101 rt2x00dev->beacon_int = bss_conf->beacon_int;
102
103 rt2x00dev->ops->lib->config_erp(rt2x00dev, &erp);
104}
105
106static inline
107enum antenna rt2x00lib_config_antenna_check(enum antenna current_ant,
108 enum antenna default_ant)
109{
110 if (current_ant != ANTENNA_SW_DIVERSITY)
111 return current_ant;
112 return (default_ant != ANTENNA_SW_DIVERSITY) ? default_ant : ANTENNA_B;
113}
114
115void rt2x00lib_config_antenna(struct rt2x00_dev *rt2x00dev,
116 struct antenna_setup config)
117{
118 struct link_ant *ant = &rt2x00dev->link.ant;
119 struct antenna_setup *def = &rt2x00dev->default_ant;
120 struct antenna_setup *active = &rt2x00dev->link.ant.active;
121
122 /*
123 * Failsafe: Make sure we are not sending the
124 * ANTENNA_SW_DIVERSITY state to the driver.
125 * If that happens, fallback to hardware defaults,
126 * or our own default.
127 * If diversity handling is active for a particular antenna,
128 * we shouldn't overwrite that antenna.
129 * The calls to rt2x00lib_config_antenna_check()
130 * might have caused that we restore back to the already
131 * active setting. If that has happened we can quit.
132 */
133 if (!(ant->flags & ANTENNA_RX_DIVERSITY))
134 config.rx = rt2x00lib_config_antenna_check(config.rx, def->rx);
135 else
136 config.rx = active->rx;
137
138 if (!(ant->flags & ANTENNA_TX_DIVERSITY))
139 config.tx = rt2x00lib_config_antenna_check(config.tx, def->tx);
140 else
141 config.tx = active->tx;
142
143 if (config.rx == active->rx && config.tx == active->tx)
144 return;
145
146 /*
147 * Antenna setup changes require the RX to be disabled,
148 * else the changes will be ignored by the device.
149 */
150 if (test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
151 rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_OFF_LINK);
152
153 /*
154 * Write new antenna setup to device and reset the link tuner.
155 * The latter is required since we need to recalibrate the
156 * noise-sensitivity ratio for the new setup.
157 */
158 rt2x00dev->ops->lib->config_ant(rt2x00dev, &config);
159
160 rt2x00link_reset_tuner(rt2x00dev, true);
161
162 memcpy(active, &config, sizeof(config));
163
164 if (test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
165 rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_ON_LINK);
166}
167
168void rt2x00lib_config(struct rt2x00_dev *rt2x00dev,
169 struct ieee80211_conf *conf,
170 unsigned int ieee80211_flags)
171{
172 struct rt2x00lib_conf libconf;
173
174 memset(&libconf, 0, sizeof(libconf));
175
176 libconf.conf = conf;
177
178 if (ieee80211_flags & IEEE80211_CONF_CHANGE_CHANNEL) {
179 if (conf_is_ht40(conf))
180 __set_bit(CONFIG_CHANNEL_HT40, &rt2x00dev->flags);
181 else
182 __clear_bit(CONFIG_CHANNEL_HT40, &rt2x00dev->flags);
183
184 memcpy(&libconf.rf,
185 &rt2x00dev->spec.channels[conf->channel->hw_value],
186 sizeof(libconf.rf));
187
188 memcpy(&libconf.channel,
189 &rt2x00dev->spec.channels_info[conf->channel->hw_value],
190 sizeof(libconf.channel));
191 }
192
193 /*
194 * Start configuration.
195 */
196 rt2x00dev->ops->lib->config(rt2x00dev, &libconf, ieee80211_flags);
197
198 /*
199 * Some configuration changes affect the link quality
200 * which means we need to reset the link tuner.
201 */
202 if (ieee80211_flags & IEEE80211_CONF_CHANGE_CHANNEL)
203 rt2x00link_reset_tuner(rt2x00dev, false);
204
205 rt2x00dev->curr_band = conf->channel->band;
206 rt2x00dev->tx_power = conf->power_level;
207 rt2x00dev->short_retry = conf->short_frame_max_tx_count;
208 rt2x00dev->long_retry = conf->long_frame_max_tx_count;
209
210 rt2x00dev->rx_status.band = conf->channel->band;
211 rt2x00dev->rx_status.freq = conf->channel->center_freq;
212}