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rt2x00: Improve interface_modes initialization
[linux-2.6-omap-h63xx.git] / drivers / net / wireless / rt2x00 / rt2x00config.c
1 /*
2         Copyright (C) 2004 - 2008 rt2x00 SourceForge Project
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
32 void rt2x00lib_config_intf(struct rt2x00_dev *rt2x00dev,
33                            struct rt2x00_intf *intf,
34                            enum nl80211_iftype type,
35                            u8 *mac, 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                 conf.sync = TSF_SYNC_BEACON;
46                 break;
47         case NL80211_IFTYPE_STATION:
48                 conf.sync = TSF_SYNC_INFRA;
49                 break;
50         default:
51                 conf.sync = TSF_SYNC_NONE;
52                 break;
53         }
54
55         /*
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.
60          */
61         memset(&conf.mac, 0, sizeof(conf.mac));
62         if (mac)
63                 memcpy(&conf.mac, mac, ETH_ALEN);
64
65         memset(&conf.bssid, 0, sizeof(conf.bssid));
66         if (bssid)
67                 memcpy(&conf.bssid, bssid, ETH_ALEN);
68
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;
74
75         rt2x00dev->ops->lib->config_intf(rt2x00dev, intf, &conf, flags);
76 }
77
78 void rt2x00lib_config_erp(struct rt2x00_dev *rt2x00dev,
79                           struct rt2x00_intf *intf,
80                           struct ieee80211_bss_conf *bss_conf)
81 {
82         struct rt2x00lib_erp erp;
83
84         memset(&erp, 0, sizeof(erp));
85
86         erp.short_preamble = bss_conf->use_short_preamble;
87         erp.cts_protection = bss_conf->use_cts_prot;
88
89         erp.slot_time = bss_conf->use_short_slot ? SHORT_SLOT_TIME : SLOT_TIME;
90         erp.sifs = SIFS;
91         erp.pifs = bss_conf->use_short_slot ? SHORT_PIFS : PIFS;
92         erp.difs = bss_conf->use_short_slot ? SHORT_DIFS : DIFS;
93         erp.eifs = bss_conf->use_short_slot ? SHORT_EIFS : EIFS;
94
95         erp.ack_timeout = PLCP + erp.difs + get_duration(ACK_SIZE, 10);
96         erp.ack_consume_time = SIFS + PLCP + get_duration(ACK_SIZE, 10);
97
98         if (bss_conf->use_short_preamble) {
99                 erp.ack_timeout += SHORT_PREAMBLE;
100                 erp.ack_consume_time += SHORT_PREAMBLE;
101         } else {
102                 erp.ack_timeout += PREAMBLE;
103                 erp.ack_consume_time += PREAMBLE;
104         }
105
106         erp.basic_rates = bss_conf->basic_rates;
107
108         rt2x00dev->ops->lib->config_erp(rt2x00dev, &erp);
109 }
110
111 void rt2x00lib_config_antenna(struct rt2x00_dev *rt2x00dev,
112                               enum antenna rx, enum antenna tx)
113 {
114         struct antenna_setup ant;
115
116         ant.rx = rx;
117         ant.tx = tx;
118
119         if (rx == rt2x00dev->link.ant.active.rx &&
120             tx == rt2x00dev->link.ant.active.tx)
121                 return;
122
123         /*
124          * Antenna setup changes require the RX to be disabled,
125          * else the changes will be ignored by the device.
126          */
127         if (test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
128                 rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_OFF_LINK);
129
130         /*
131          * Write new antenna setup to device and reset the link tuner.
132          * The latter is required since we need to recalibrate the
133          * noise-sensitivity ratio for the new setup.
134          */
135         rt2x00dev->ops->lib->config_ant(rt2x00dev, &ant);
136
137         rt2x00lib_reset_link_tuner(rt2x00dev);
138         rt2x00_reset_link_ant_rssi(&rt2x00dev->link);
139
140         memcpy(&rt2x00dev->link.ant.active, &ant, sizeof(ant));
141
142         if (test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
143                 rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_ON_LINK);
144 }
145
146 void rt2x00lib_config(struct rt2x00_dev *rt2x00dev,
147                       struct ieee80211_conf *conf,
148                       unsigned int ieee80211_flags)
149 {
150         struct rt2x00lib_conf libconf;
151
152         memset(&libconf, 0, sizeof(libconf));
153
154         libconf.conf = conf;
155
156         if (ieee80211_flags & IEEE80211_CONF_CHANGE_CHANNEL) {
157                 memcpy(&libconf.rf,
158                        &rt2x00dev->spec.channels[conf->channel->hw_value],
159                        sizeof(libconf.rf));
160
161                 memcpy(&libconf.channel,
162                        &rt2x00dev->spec.channels_info[conf->channel->hw_value],
163                        sizeof(libconf.channel));
164         }
165
166         /*
167          * Start configuration.
168          */
169         rt2x00dev->ops->lib->config(rt2x00dev, &libconf, ieee80211_flags);
170
171         /*
172          * Some configuration changes affect the link quality
173          * which means we need to reset the link tuner.
174          */
175         if (ieee80211_flags & IEEE80211_CONF_CHANGE_CHANNEL)
176                 rt2x00lib_reset_link_tuner(rt2x00dev);
177
178         rt2x00dev->curr_band = conf->channel->band;
179         rt2x00dev->tx_power = conf->power_level;
180
181         rt2x00dev->rx_status.band = conf->channel->band;
182         rt2x00dev->rx_status.freq = conf->channel->center_freq;
183 }