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 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 82void 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 108static inline 109enum 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 117void 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 170void 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} 219