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