/* Copyright (C) 2004 - 2009 rt2x00 SourceForge Project This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ /* Module: rt2x00lib Abstract: rt2x00 generic configuration routines. */ #include #include #include "rt2x00.h" #include "rt2x00lib.h" void rt2x00lib_config_intf(struct rt2x00_dev *rt2x00dev, struct rt2x00_intf *intf, enum nl80211_iftype type, const u8 *mac, const u8 *bssid) { struct rt2x00intf_conf conf; unsigned int flags = 0; conf.type = type; switch (type) { case NL80211_IFTYPE_ADHOC: case NL80211_IFTYPE_AP: case NL80211_IFTYPE_MESH_POINT: case NL80211_IFTYPE_WDS: conf.sync = TSF_SYNC_BEACON; break; case NL80211_IFTYPE_STATION: conf.sync = TSF_SYNC_INFRA; break; default: conf.sync = TSF_SYNC_NONE; break; } /* * Note that when NULL is passed as address we will send * 00:00:00:00:00 to the device to clear the address. * This will prevent the device being confused when it wants * to ACK frames or consideres itself associated. */ memset(&conf.mac, 0, sizeof(conf.mac)); if (mac) memcpy(&conf.mac, mac, ETH_ALEN); memset(&conf.bssid, 0, sizeof(conf.bssid)); if (bssid) memcpy(&conf.bssid, bssid, ETH_ALEN); flags |= CONFIG_UPDATE_TYPE; if (mac || (!rt2x00dev->intf_ap_count && !rt2x00dev->intf_sta_count)) flags |= CONFIG_UPDATE_MAC; if (bssid || (!rt2x00dev->intf_ap_count && !rt2x00dev->intf_sta_count)) flags |= CONFIG_UPDATE_BSSID; rt2x00dev->ops->lib->config_intf(rt2x00dev, intf, &conf, flags); } void rt2x00lib_config_erp(struct rt2x00_dev *rt2x00dev, struct rt2x00_intf *intf, struct ieee80211_bss_conf *bss_conf) { struct rt2x00lib_erp erp; memset(&erp, 0, sizeof(erp)); erp.short_preamble = bss_conf->use_short_preamble; erp.cts_protection = bss_conf->use_cts_prot; erp.slot_time = bss_conf->use_short_slot ? SHORT_SLOT_TIME : SLOT_TIME; erp.sifs = SIFS; erp.pifs = bss_conf->use_short_slot ? SHORT_PIFS : PIFS; erp.difs = bss_conf->use_short_slot ? SHORT_DIFS : DIFS; erp.eifs = bss_conf->use_short_slot ? SHORT_EIFS : EIFS; erp.ack_timeout = PLCP + erp.difs + GET_DURATION(ACK_SIZE, 10); erp.ack_consume_time = SIFS + PLCP + GET_DURATION(ACK_SIZE, 10); if (bss_conf->use_short_preamble) { erp.ack_timeout += SHORT_PREAMBLE; erp.ack_consume_time += SHORT_PREAMBLE; } else { erp.ack_timeout += PREAMBLE; erp.ack_consume_time += PREAMBLE; } erp.basic_rates = bss_conf->basic_rates; erp.beacon_int = bss_conf->beacon_int; /* Update global beacon interval time, this is needed for PS support */ rt2x00dev->beacon_int = bss_conf->beacon_int; rt2x00dev->ops->lib->config_erp(rt2x00dev, &erp); } static inline enum antenna rt2x00lib_config_antenna_check(enum antenna current_ant, enum antenna default_ant) { if (current_ant != ANTENNA_SW_DIVERSITY) return current_ant; return (default_ant != ANTENNA_SW_DIVERSITY) ? default_ant : ANTENNA_B; } void rt2x00lib_config_antenna(struct rt2x00_dev *rt2x00dev, struct antenna_setup ant) { struct antenna_setup *def = &rt2x00dev->default_ant; struct antenna_setup *active = &rt2x00dev->link.ant.active; /* * Failsafe: Make sure we are not sending the * ANTENNA_SW_DIVERSITY state to the driver. * If that happens, fallback to hardware defaults, * or our own default. * The calls to rt2x00lib_config_antenna_check() * might have caused that we restore back to the already * active setting. If that has happened we can quit. */ ant.rx = rt2x00lib_config_antenna_check(ant.rx, def->rx); ant.tx = rt2x00lib_config_antenna_check(ant.tx, def->tx); if (ant.rx == active->rx && ant.tx == active->tx) return; /* * Antenna setup changes require the RX to be disabled, * else the changes will be ignored by the device. */ if (test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags)) rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_OFF_LINK); /* * Write new antenna setup to device and reset the link tuner. * The latter is required since we need to recalibrate the * noise-sensitivity ratio for the new setup. */ rt2x00dev->ops->lib->config_ant(rt2x00dev, &ant); rt2x00link_reset_tuner(rt2x00dev, true); memcpy(active, &ant, sizeof(ant)); if (test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags)) rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_ON_LINK); } void rt2x00lib_config(struct rt2x00_dev *rt2x00dev, struct ieee80211_conf *conf, unsigned int ieee80211_flags) { struct rt2x00lib_conf libconf; memset(&libconf, 0, sizeof(libconf)); libconf.conf = conf; if (ieee80211_flags & IEEE80211_CONF_CHANGE_CHANNEL) { if (conf_is_ht40(conf)) __set_bit(CONFIG_CHANNEL_HT40, &rt2x00dev->flags); else __clear_bit(CONFIG_CHANNEL_HT40, &rt2x00dev->flags); memcpy(&libconf.rf, &rt2x00dev->spec.channels[conf->channel->hw_value], sizeof(libconf.rf)); memcpy(&libconf.channel, &rt2x00dev->spec.channels_info[conf->channel->hw_value], sizeof(libconf.channel)); } /* * Start configuration. */ rt2x00dev->ops->lib->config(rt2x00dev, &libconf, ieee80211_flags); /* * Some configuration changes affect the link quality * which means we need to reset the link tuner. */ if (ieee80211_flags & IEEE80211_CONF_CHANGE_CHANNEL) rt2x00link_reset_tuner(rt2x00dev, false); rt2x00dev->curr_band = conf->channel->band; rt2x00dev->tx_power = conf->power_level; rt2x00dev->short_retry = conf->short_frame_max_tx_count; rt2x00dev->long_retry = conf->long_frame_max_tx_count; rt2x00dev->rx_status.band = conf->channel->band; rt2x00dev->rx_status.freq = conf->channel->center_freq; }