release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/net/wireless/rt2x00/rt2x00config.c

   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
  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 consideres 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
  82 void rt2x00lib_config_erp(struct rt2x00_dev *rt2x00dev,
  83                           struct rt2x00_intf *intf,
  84                           struct ieee80211_bss_conf *bss_conf)
  85 {
  86         struct rt2x00lib_erp erp;
  87
  88         memset(&erp, 0, sizeof(erp));
  89
  90         erp.short_preamble = bss_conf->use_short_preamble;
  91         erp.cts_protection = bss_conf->use_cts_prot;
  92
  93         erp.slot_time = bss_conf->use_short_slot ? SHORT_SLOT_TIME : SLOT_TIME;
  94         erp.sifs = SIFS;
  95         erp.pifs = bss_conf->use_short_slot ? SHORT_PIFS : PIFS;
  96         erp.difs = bss_conf->use_short_slot ? SHORT_DIFS : DIFS;
  97         erp.eifs = bss_conf->use_short_slot ? SHORT_EIFS : EIFS;
  98
  99         erp.basic_rates = bss_conf->basic_rates;
 100         erp.beacon_int = bss_conf->beacon_int;
 101
 102         /* Update global beacon interval time, this is needed for PS support */
 103         rt2x00dev->beacon_int = bss_conf->beacon_int;
 104
 105         rt2x00dev->ops->lib->config_erp(rt2x00dev, &erp);
 106 }
 107
 108 static inline
 109 enum antenna rt2x00lib_config_antenna_check(enum antenna current_ant,
 110                                             enum antenna default_ant)
 111 {
 112         if (current_ant != ANTENNA_SW_DIVERSITY)
 113                 return current_ant;
 114         return (default_ant != ANTENNA_SW_DIVERSITY) ? default_ant : ANTENNA_B;
 115 }
 116
 117 void rt2x00lib_config_antenna(struct rt2x00_dev *rt2x00dev,
 118                               struct antenna_setup config)
 119 {
 120         struct link_ant *ant = &rt2x00dev->link.ant;
 121         struct antenna_setup *def = &rt2x00dev->default_ant;
 122         struct antenna_setup *active = &rt2x00dev->link.ant.active;
 123
 124         /*
 125          * Failsafe: Make sure we are not sending the
 126          * ANTENNA_SW_DIVERSITY state to the driver.
 127          * If that happens, fallback to hardware defaults,
 128          * or our own default.
 129          * If diversity handling is active for a particular antenna,
 130          * we shouldn't overwrite that antenna.
 131          * The calls to rt2x00lib_config_antenna_check()
 132          * might have caused that we restore back to the already
 133          * active setting. If that has happened we can quit.
 134          */
 135         if (!(ant->flags & ANTENNA_RX_DIVERSITY))
 136                 config.rx = rt2x00lib_config_antenna_check(config.rx, def->rx);
 137         else
 138                 config.rx = active->rx;
 139
 140         if (!(ant->flags & ANTENNA_TX_DIVERSITY))
 141                 config.tx = rt2x00lib_config_antenna_check(config.tx, def->tx);
 142         else
 143                 config.tx = active->tx;
 144
 145         if (config.rx == active->rx && config.tx == active->tx)
 146                 return;
 147
 148         /*
 149          * Antenna setup changes require the RX to be disabled,
 150          * else the changes will be ignored by the device.
 151          */
 152         if (test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
 153                 rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_OFF_LINK);
 154
 155         /*
 156          * Write new antenna setup to device and reset the link tuner.
 157          * The latter is required since we need to recalibrate the
 158          * noise-sensitivity ratio for the new setup.
 159          */
 160         rt2x00dev->ops->lib->config_ant(rt2x00dev, &config);
 161
 162         rt2x00link_reset_tuner(rt2x00dev, true);
 163
 164         memcpy(active, &config, sizeof(config));
 165
 166         if (test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
 167                 rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_ON_LINK);
 168 }
 169
 170 void rt2x00lib_config(struct rt2x00_dev *rt2x00dev,
 171                       struct ieee80211_conf *conf,
 172                       unsigned int ieee80211_flags)
 173 {
 174         struct rt2x00lib_conf libconf;
 175         u16 hw_value;
 176
 177         memset(&libconf, 0, sizeof(libconf));
 178
 179         libconf.conf = conf;
 180
 181         if (ieee80211_flags & IEEE80211_CONF_CHANGE_CHANNEL) {
 182                 if (conf_is_ht40(conf)) {
 183                         __set_bit(CONFIG_CHANNEL_HT40, &rt2x00dev->flags);
 184                         hw_value = rt2x00ht_center_channel(rt2x00dev, conf);
 185                 } else {
 186                         __clear_bit(CONFIG_CHANNEL_HT40, &rt2x00dev->flags);
 187                         hw_value = conf->channel->hw_value;
 188                 }
 189
 190                 memcpy(&libconf.rf,
 191                        &rt2x00dev->spec.channels[hw_value],
 192                        sizeof(libconf.rf));
 193
 194                 memcpy(&libconf.channel,
 195                        &rt2x00dev->spec.channels_info[hw_value],
 196                        sizeof(libconf.channel));
 197         }
 198
 199         /*
 200          * Start configuration.
 201          */
 202         rt2x00dev->ops->lib->config(rt2x00dev, &libconf, ieee80211_flags);
 203
 204         /*
 205          * Some configuration changes affect the link quality
 206          * which means we need to reset the link tuner.
 207          */
 208         if (ieee80211_flags & IEEE80211_CONF_CHANGE_CHANNEL)
 209                 rt2x00link_reset_tuner(rt2x00dev, false);
 210
 211         rt2x00dev->curr_band = conf->channel->band;
 212         rt2x00dev->tx_power = conf->power_level;
 213         rt2x00dev->short_retry = conf->short_frame_max_tx_count;
 214         rt2x00dev->long_retry = conf->long_frame_max_tx_count;
 215
 216         rt2x00dev->rx_status.band = conf->channel->band;
 217         rt2x00dev->rx_status.freq = conf->channel->center_freq;
 218 }