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 30 void 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 80 void 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 } 113 114 void 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 } 174 175 static 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 } 202 203 void 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 (rt2x00_has_cap_flag(rt2x00dev, REQUIRE_PS_AUTOWAKE) && 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 rt2x00_has_cap_flag(rt2x00dev, REQUIRE_PS_AUTOWAKE) && 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->ps_dtim_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 if (conf->flags & IEEE80211_CONF_MONITOR) 281 set_bit(CONFIG_MONITORING, &rt2x00dev->flags); 282 else 283 clear_bit(CONFIG_MONITORING, &rt2x00dev->flags); 284 285 rt2x00dev->curr_band = conf->chandef.chan->band; 286 rt2x00dev->curr_freq = conf->chandef.chan->center_freq; 287 rt2x00dev->tx_power = conf->power_level; 288 rt2x00dev->short_retry = conf->short_frame_max_tx_count; 289 rt2x00dev->long_retry = conf->long_frame_max_tx_count; 290 } 291