/*

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->last_tsf;

/* 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_ht(conf))

set_bit(CONFIG_HT_DISABLED, &rt2x00dev->flags);

else

clear_bit(CONFIG_HT_DISABLED, &rt2x00dev->flags);

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));

/* Used for VCO periodic calibration */

rt2x00dev->rf_channel = libconf.rf.channel;

} else

{

return;

}

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(DEVICE_STATE_PRESENT, &rt2x00dev->flags) &&

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;

}