drivers/net/wireless/rt2x00/rt2x00config.c - linux - Git at Google

 /*
 	Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com>
 	<http://rt2x00.serialmonkey.com>

 	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 <linux/kernel.h>
 #include <linux/module.h>

 #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:
 		conf.sync = TSF_SYNC_ADHOC;
 		break;
 	case NL80211_IFTYPE_AP:
 	case NL80211_IFTYPE_MESH_POINT:
 	case NL80211_IFTYPE_WDS:
 		conf.sync = TSF_SYNC_AP_NONE;
 		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 considers 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,
 			  u32 changed)
 {
 	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.basic_rates = bss_conf->basic_rates;
 	erp.beacon_int = bss_conf->beacon_int;

 	/* Update the AID, this is needed for dynamic PS support */
 	rt2x00dev->aid = bss_conf->assoc ? bss_conf->aid : 0;
 	rt2x00dev->last_beacon = bss_conf->timestamp;

 	/* Update global beacon interval time, this is needed for PS support */
 	rt2x00dev->beacon_int = bss_conf->beacon_int;

 	if (changed & BSS_CHANGED_HT)
 		erp.ht_opmode = bss_conf->ht_operation_mode;

 	rt2x00dev->ops->lib->config_erp(rt2x00dev, &erp, changed);
 }

 void rt2x00lib_config_antenna(struct rt2x00_dev *rt2x00dev,
 			      struct antenna_setup config)
 {
 	struct link_ant *ant = &rt2x00dev->link.ant;
 	struct antenna_setup *def = &rt2x00dev->default_ant;
 	struct antenna_setup *active = &rt2x00dev->link.ant.active;

 	/*
 	 * When the caller tries to send the SW diversity,
 	 * we must update the ANTENNA_RX_DIVERSITY flag to
 	 * enable the antenna diversity in the link tuner.
 	 *
 	 * Secondly, we must guarentee we never send the
 	 * software antenna diversity command to the driver.
 	 */
 	if (!(ant->flags & ANTENNA_RX_DIVERSITY)) {
 		if (config.rx == ANTENNA_SW_DIVERSITY) {
 			ant->flags |= ANTENNA_RX_DIVERSITY;

 			if (def->rx == ANTENNA_SW_DIVERSITY)
 				config.rx = ANTENNA_B;
 			else
 				config.rx = def->rx;
 		}
 	} else if (config.rx == ANTENNA_SW_DIVERSITY)
 		config.rx = active->rx;

 	if (!(ant->flags & ANTENNA_TX_DIVERSITY)) {
 		if (config.tx == ANTENNA_SW_DIVERSITY) {
 			ant->flags |= ANTENNA_TX_DIVERSITY;

 			if (def->tx == ANTENNA_SW_DIVERSITY)
 				config.tx = ANTENNA_B;
 			else
 				config.tx = def->tx;
 		}
 	} else if (config.tx == ANTENNA_SW_DIVERSITY)
 		config.tx = active->tx;

 	/*
 	 * 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))
 		rt2x00queue_stop_queue(rt2x00dev->rx);

 	/*
 	 * 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, &config);

 	rt2x00link_reset_tuner(rt2x00dev, true);

 	memcpy(active, &config, sizeof(config));

 	if (test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
 		rt2x00queue_start_queue(rt2x00dev->rx);
 }

 static u16 rt2x00ht_center_channel(struct rt2x00_dev *rt2x00dev,
 				   struct ieee80211_conf *conf)
 {
 	struct hw_mode_spec *spec = &rt2x00dev->spec;
 	int center_channel;
 	u16 i;

 	/*
 	 * Initialize center channel to current channel.
 	 */
 	center_channel = spec->channels[conf->channel->hw_value].channel;

 	/*
 	 * Adjust center channel to HT40+ and HT40- operation.
 	 */
 	if (conf_is_ht40_plus(conf))
 		center_channel += 2;
 	else if (conf_is_ht40_minus(conf))
 		center_channel -= (center_channel == 14) ? 1 : 2;

 	for (i = 0; i < spec->num_channels; i++)
 		if (spec->channels[i].channel == center_channel)
 			return i;

 	WARN_ON(1);
 	return conf->channel->hw_value;
 }

 void rt2x00lib_config(struct rt2x00_dev *rt2x00dev,
 		      struct ieee80211_conf *conf,
 		      unsigned int ieee80211_flags)
 {
 	struct rt2x00lib_conf libconf;
 	u16 hw_value;
 	u16 autowake_timeout;
 	u16 beacon_int;
 	u16 beacon_diff;

 	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);
 			hw_value = rt2x00ht_center_channel(rt2x00dev, conf);
 		} else {
 			clear_bit(CONFIG_CHANNEL_HT40, &rt2x00dev->flags);
 			hw_value = conf->channel->hw_value;
 		}

 		memcpy(&libconf.rf,
 		       &rt2x00dev->spec.channels[hw_value],
 		       sizeof(libconf.rf));

 		memcpy(&libconf.channel,
 		       &rt2x00dev->spec.channels_info[hw_value],
 		       sizeof(libconf.channel));
 	}

 	if (test_bit(REQUIRE_PS_AUTOWAKE, &rt2x00dev->cap_flags) &&
 	    (ieee80211_flags & IEEE80211_CONF_CHANGE_PS))
 		cancel_delayed_work_sync(&rt2x00dev->autowakeup_work);

 	/*
 	 * 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);

 	if (test_bit(REQUIRE_PS_AUTOWAKE, &rt2x00dev->cap_flags) &&
 	    (ieee80211_flags & IEEE80211_CONF_CHANGE_PS) &&
 	    (conf->flags & IEEE80211_CONF_PS)) {
 		beacon_diff = (long)jiffies - (long)rt2x00dev->last_beacon;
 		beacon_int = msecs_to_jiffies(rt2x00dev->beacon_int);

 		if (beacon_diff > beacon_int)
 			beacon_diff = 0;

 		autowake_timeout = (conf->max_sleep_period * beacon_int) - beacon_diff;
 		queue_delayed_work(rt2x00dev->workqueue,
 				   &rt2x00dev->autowakeup_work,
 				   autowake_timeout - 15);
 	}

 	if (conf->flags & IEEE80211_CONF_PS)
 		set_bit(CONFIG_POWERSAVING, &rt2x00dev->flags);
 	else
 		clear_bit(CONFIG_POWERSAVING, &rt2x00dev->flags);

 	rt2x00dev->curr_band = conf->channel->band;
 	rt2x00dev->curr_freq = conf->channel->center_freq;
 	rt2x00dev->tx_power = conf->power_level;
 	rt2x00dev->short_retry = conf->short_frame_max_tx_count;
 	rt2x00dev->long_retry = conf->long_frame_max_tx_count;
 }
	/*
	Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com>
	<http://rt2x00.serialmonkey.com>

	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 <linux/kernel.h>
	#include <linux/module.h>

	#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:
	conf.sync = TSF_SYNC_ADHOC;
	break;
	case NL80211_IFTYPE_AP:
	case NL80211_IFTYPE_MESH_POINT:
	case NL80211_IFTYPE_WDS:
	conf.sync = TSF_SYNC_AP_NONE;
	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 considers 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,
	u32 changed)
	{
	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.basic_rates = bss_conf->basic_rates;
	erp.beacon_int = bss_conf->beacon_int;

	/* Update the AID, this is needed for dynamic PS support */
	rt2x00dev->aid = bss_conf->assoc ? bss_conf->aid : 0;
	rt2x00dev->last_beacon = bss_conf->timestamp;

	/* Update global beacon interval time, this is needed for PS support */
	rt2x00dev->beacon_int = bss_conf->beacon_int;

	if (changed & BSS_CHANGED_HT)
	erp.ht_opmode = bss_conf->ht_operation_mode;

	rt2x00dev->ops->lib->config_erp(rt2x00dev, &erp, changed);
	}

	void rt2x00lib_config_antenna(struct rt2x00_dev *rt2x00dev,
	struct antenna_setup config)
	{
	struct link_ant *ant = &rt2x00dev->link.ant;
	struct antenna_setup *def = &rt2x00dev->default_ant;
	struct antenna_setup *active = &rt2x00dev->link.ant.active;

	/*
	* When the caller tries to send the SW diversity,
	* we must update the ANTENNA_RX_DIVERSITY flag to
	* enable the antenna diversity in the link tuner.
	*
	* Secondly, we must guarentee we never send the
	* software antenna diversity command to the driver.
	*/
	if (!(ant->flags & ANTENNA_RX_DIVERSITY)) {
	if (config.rx == ANTENNA_SW_DIVERSITY) {
	ant->flags \|= ANTENNA_RX_DIVERSITY;

	if (def->rx == ANTENNA_SW_DIVERSITY)
	config.rx = ANTENNA_B;
	else
	config.rx = def->rx;
	}
	} else if (config.rx == ANTENNA_SW_DIVERSITY)
	config.rx = active->rx;

	if (!(ant->flags & ANTENNA_TX_DIVERSITY)) {
	if (config.tx == ANTENNA_SW_DIVERSITY) {
	ant->flags \|= ANTENNA_TX_DIVERSITY;

	if (def->tx == ANTENNA_SW_DIVERSITY)
	config.tx = ANTENNA_B;
	else
	config.tx = def->tx;
	}
	} else if (config.tx == ANTENNA_SW_DIVERSITY)
	config.tx = active->tx;

	/*
	* 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))
	rt2x00queue_stop_queue(rt2x00dev->rx);

	/*
	* 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, &config);

	rt2x00link_reset_tuner(rt2x00dev, true);

	memcpy(active, &config, sizeof(config));

	if (test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
	rt2x00queue_start_queue(rt2x00dev->rx);
	}

	static u16 rt2x00ht_center_channel(struct rt2x00_dev *rt2x00dev,
	struct ieee80211_conf *conf)
	{
	struct hw_mode_spec *spec = &rt2x00dev->spec;
	int center_channel;
	u16 i;

	/*
	* Initialize center channel to current channel.
	*/
	center_channel = spec->channels[conf->channel->hw_value].channel;

	/*
	* Adjust center channel to HT40+ and HT40- operation.
	*/
	if (conf_is_ht40_plus(conf))
	center_channel += 2;
	else if (conf_is_ht40_minus(conf))
	center_channel -= (center_channel == 14) ? 1 : 2;

	for (i = 0; i < spec->num_channels; i++)
	if (spec->channels[i].channel == center_channel)
	return i;

	WARN_ON(1);
	return conf->channel->hw_value;
	}

	void rt2x00lib_config(struct rt2x00_dev *rt2x00dev,
	struct ieee80211_conf *conf,
	unsigned int ieee80211_flags)
	{
	struct rt2x00lib_conf libconf;
	u16 hw_value;
	u16 autowake_timeout;
	u16 beacon_int;
	u16 beacon_diff;

	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);
	hw_value = rt2x00ht_center_channel(rt2x00dev, conf);
	} else {
	clear_bit(CONFIG_CHANNEL_HT40, &rt2x00dev->flags);
	hw_value = conf->channel->hw_value;
	}

	memcpy(&libconf.rf,
	&rt2x00dev->spec.channels[hw_value],
	sizeof(libconf.rf));

	memcpy(&libconf.channel,
	&rt2x00dev->spec.channels_info[hw_value],
	sizeof(libconf.channel));
	}

	if (test_bit(REQUIRE_PS_AUTOWAKE, &rt2x00dev->cap_flags) &&
	(ieee80211_flags & IEEE80211_CONF_CHANGE_PS))
	cancel_delayed_work_sync(&rt2x00dev->autowakeup_work);

	/*
	* 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);

	if (test_bit(REQUIRE_PS_AUTOWAKE, &rt2x00dev->cap_flags) &&
	(ieee80211_flags & IEEE80211_CONF_CHANGE_PS) &&
	(conf->flags & IEEE80211_CONF_PS)) {
	beacon_diff = (long)jiffies - (long)rt2x00dev->last_beacon;
	beacon_int = msecs_to_jiffies(rt2x00dev->beacon_int);

	if (beacon_diff > beacon_int)
	beacon_diff = 0;

	autowake_timeout = (conf->max_sleep_period * beacon_int) - beacon_diff;
	queue_delayed_work(rt2x00dev->workqueue,
	&rt2x00dev->autowakeup_work,
	autowake_timeout - 15);
	}

	if (conf->flags & IEEE80211_CONF_PS)
	set_bit(CONFIG_POWERSAVING, &rt2x00dev->flags);
	else
	clear_bit(CONFIG_POWERSAVING, &rt2x00dev->flags);

	rt2x00dev->curr_band = conf->channel->band;
	rt2x00dev->curr_freq = conf->channel->center_freq;
	rt2x00dev->tx_power = conf->power_level;
	rt2x00dev->short_retry = conf->short_frame_max_tx_count;
	rt2x00dev->long_retry = conf->long_frame_max_tx_count;
	}