283 lines
8.0 KiB
C
283 lines
8.0 KiB
C
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/*
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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->last_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_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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