forked from Minki/linux
8c358bcd09
Some drivers (iwlegacy, iwlwifi and rt2x00) today use the bss_conf.last_tsf value. By itself though that value is completely worthless since it may be ancient. What really is needed is synchronisation between some device time and the TSF. To clarify this, rename bss_conf.last_tsf to sync_tsf and add sync_device_ts which is obtained from rx_status which gets a new field device_timestamp for this purpose. This is intentionally not using the mactime field since that is used for other things and in IBSS is expected to sync with the IBSS's TSF which isn't necessarily true for the device timestamp. Also, since we have the information and it's useful even before the connection has been established, give all the timing details to the driver before authenticating. Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
288 lines
8.1 KiB
C
288 lines
8.1 KiB
C
/*
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Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com>
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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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conf.sync = TSF_SYNC_ADHOC;
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break;
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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_AP_NONE;
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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 considers 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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u32 changed)
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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 the AID, this is needed for dynamic PS support */
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rt2x00dev->aid = bss_conf->assoc ? bss_conf->aid : 0;
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rt2x00dev->last_beacon = bss_conf->sync_tsf;
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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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if (changed & BSS_CHANGED_HT)
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erp.ht_opmode = bss_conf->ht_operation_mode;
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rt2x00dev->ops->lib->config_erp(rt2x00dev, &erp, changed);
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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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* When the caller tries to send the SW diversity,
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* we must update the ANTENNA_RX_DIVERSITY flag to
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* enable the antenna diversity in the link tuner.
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*
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* Secondly, we must guarentee we never send the
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* software antenna diversity command to the driver.
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*/
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if (!(ant->flags & ANTENNA_RX_DIVERSITY)) {
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if (config.rx == ANTENNA_SW_DIVERSITY) {
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ant->flags |= ANTENNA_RX_DIVERSITY;
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if (def->rx == ANTENNA_SW_DIVERSITY)
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config.rx = ANTENNA_B;
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else
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config.rx = def->rx;
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}
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} else if (config.rx == ANTENNA_SW_DIVERSITY)
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config.rx = active->rx;
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if (!(ant->flags & ANTENNA_TX_DIVERSITY)) {
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if (config.tx == ANTENNA_SW_DIVERSITY) {
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ant->flags |= ANTENNA_TX_DIVERSITY;
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if (def->tx == ANTENNA_SW_DIVERSITY)
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config.tx = ANTENNA_B;
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else
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config.tx = def->tx;
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}
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} else if (config.tx == ANTENNA_SW_DIVERSITY)
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config.tx = active->tx;
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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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rt2x00queue_stop_queue(rt2x00dev->rx);
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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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rt2x00queue_start_queue(rt2x00dev->rx);
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}
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static u16 rt2x00ht_center_channel(struct rt2x00_dev *rt2x00dev,
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struct ieee80211_conf *conf)
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{
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struct hw_mode_spec *spec = &rt2x00dev->spec;
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int center_channel;
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u16 i;
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/*
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* Initialize center channel to current channel.
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*/
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center_channel = spec->channels[conf->channel->hw_value].channel;
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/*
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* Adjust center channel to HT40+ and HT40- operation.
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*/
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if (conf_is_ht40_plus(conf))
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center_channel += 2;
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else if (conf_is_ht40_minus(conf))
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center_channel -= (center_channel == 14) ? 1 : 2;
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for (i = 0; i < spec->num_channels; i++)
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if (spec->channels[i].channel == center_channel)
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return i;
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WARN_ON(1);
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return conf->channel->hw_value;
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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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u16 hw_value;
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u16 autowake_timeout;
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u16 beacon_int;
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u16 beacon_diff;
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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_ht(conf))
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set_bit(CONFIG_HT_DISABLED, &rt2x00dev->flags);
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else
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clear_bit(CONFIG_HT_DISABLED, &rt2x00dev->flags);
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if (conf_is_ht40(conf)) {
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set_bit(CONFIG_CHANNEL_HT40, &rt2x00dev->flags);
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hw_value = rt2x00ht_center_channel(rt2x00dev, conf);
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} else {
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clear_bit(CONFIG_CHANNEL_HT40, &rt2x00dev->flags);
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hw_value = conf->channel->hw_value;
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}
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memcpy(&libconf.rf,
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&rt2x00dev->spec.channels[hw_value],
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sizeof(libconf.rf));
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memcpy(&libconf.channel,
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&rt2x00dev->spec.channels_info[hw_value],
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sizeof(libconf.channel));
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/* Used for VCO periodic calibration */
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rt2x00dev->rf_channel = libconf.rf.channel;
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}
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if (test_bit(REQUIRE_PS_AUTOWAKE, &rt2x00dev->cap_flags) &&
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(ieee80211_flags & IEEE80211_CONF_CHANGE_PS))
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cancel_delayed_work_sync(&rt2x00dev->autowakeup_work);
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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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if (test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags) &&
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test_bit(REQUIRE_PS_AUTOWAKE, &rt2x00dev->cap_flags) &&
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(ieee80211_flags & IEEE80211_CONF_CHANGE_PS) &&
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(conf->flags & IEEE80211_CONF_PS)) {
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beacon_diff = (long)jiffies - (long)rt2x00dev->last_beacon;
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beacon_int = msecs_to_jiffies(rt2x00dev->beacon_int);
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if (beacon_diff > beacon_int)
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beacon_diff = 0;
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autowake_timeout = (conf->max_sleep_period * beacon_int) - beacon_diff;
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queue_delayed_work(rt2x00dev->workqueue,
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&rt2x00dev->autowakeup_work,
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autowake_timeout - 15);
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}
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if (conf->flags & IEEE80211_CONF_PS)
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set_bit(CONFIG_POWERSAVING, &rt2x00dev->flags);
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else
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clear_bit(CONFIG_POWERSAVING, &rt2x00dev->flags);
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rt2x00dev->curr_band = conf->channel->band;
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rt2x00dev->curr_freq = conf->channel->center_freq;
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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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}
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