void rt2x00lib_config_antenna(struct rt2x00_dev *rt2x00dev,
enum antenna rx, enum antenna tx)
{
struct rt2x00lib_conf libconf;
libconf.ant.rx = rx;
libconf.ant.tx = tx;
if (rx == rt2x00dev->link.ant.active.rx &&
tx == rt2x00dev->link.ant.active.tx)
return;
/*
* Antenna setup changes require the RX to be disabled,
* else the changes will be ignored by the device.
*/
if (test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_OFF_LINK);
/*
* 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(rt2x00dev, &libconf, CONFIG_UPDATE_ANTENNA);
rt2x00lib_reset_link_tuner(rt2x00dev);
rt2x00_reset_link_ant_rssi(&rt2x00dev->link);
rt2x00dev->link.ant.active.rx = libconf.ant.rx;
rt2x00dev->link.ant.active.tx = libconf.ant.tx;
if (test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_ON_LINK);
}
static void rt2x00lib_start_link_tuner(struct rt2x00_dev *rt2x00dev)
{
/*
* Clear all (possibly) pre-existing quality statistics.
*/
memset(&rt2x00dev->link.qual, 0, sizeof(rt2x00dev->link.qual));
/*
* The RX and TX percentage should start at 50%
* this will assure we will get at least get some
* decent value when the link tuner starts.
* The value will be dropped and overwritten with
* the correct (measured )value anyway during the
* first run of the link tuner.
*/
rt2x00dev->link.qual.rx_percentage = 50;
rt2x00dev->link.qual.tx_percentage = 50;
rt2x00lib_reset_link_tuner(rt2x00dev);
queue_delayed_work(rt2x00dev->hw->workqueue,
&rt2x00dev->link.work, LINK_TUNE_INTERVAL);
}
void rt2x00lib_config(struct rt2x00_dev *rt2x00dev,
struct ieee80211_conf *conf, const int force_config)
{
struct rt2x00lib_conf libconf;
struct ieee80211_supported_band *band;
struct antenna_setup *default_ant = &rt2x00dev->default_ant;
struct antenna_setup *active_ant = &rt2x00dev->link.ant.active;
int flags = 0;
int short_slot_time;
/*
* In some situations we want to force all configurations
* to be reloaded (When resuming for instance).
*/
if (force_config) {
flags = CONFIG_UPDATE_ALL;
goto config;
}
/*
* Check which configuration options have been
* updated and should be send to the device.
*/
if (rt2x00dev->rx_status.band != conf->channel->band)
flags |= CONFIG_UPDATE_PHYMODE;
if (rt2x00dev->rx_status.freq != conf->channel->center_freq)
flags |= CONFIG_UPDATE_CHANNEL;
if (rt2x00dev->tx_power != conf->power_level)
flags |= CONFIG_UPDATE_TXPOWER;
/*
* Determining changes in the antenna setups request several checks:
* antenna_sel_{r,t}x = 0
* -> Does active_{r,t}x match default_{r,t}x
* -> Is default_{r,t}x SW_DIVERSITY
* antenna_sel_{r,t}x = 1/2
* -> Does active_{r,t}x match antenna_sel_{r,t}x
* The reason for not updating the antenna while SW diversity
* should be used is simple: Software diversity means that
* we should switch between the antenna's based on the
* quality. This means that the current antenna is good enough
* to work with untill the link tuner decides that an antenna
* switch should be performed.
*/
if (!conf->antenna_sel_rx &&
default_ant->rx != ANTENNA_SW_DIVERSITY &&
default_ant->rx != active_ant->rx)
flags |= CONFIG_UPDATE_ANTENNA;
else if (conf->antenna_sel_rx &&
conf->antenna_sel_rx != active_ant->rx)
flags |= CONFIG_UPDATE_ANTENNA;
else if (active_ant->rx == ANTENNA_SW_DIVERSITY)
flags |= CONFIG_UPDATE_ANTENNA;
if (!conf->antenna_sel_tx &&
default_ant->tx != ANTENNA_SW_DIVERSITY &&
default_ant->tx != active_ant->tx)
flags |= CONFIG_UPDATE_ANTENNA;
else if (conf->antenna_sel_tx &&
conf->antenna_sel_tx != active_ant->tx)
flags |= CONFIG_UPDATE_ANTENNA;
else if (active_ant->tx == ANTENNA_SW_DIVERSITY)
flags |= CONFIG_UPDATE_ANTENNA;
/*
* The following configuration options are never
* stored anywhere and will always be updated.
*/
flags |= CONFIG_UPDATE_SLOT_TIME;
flags |= CONFIG_UPDATE_BEACON_INT;
/*
* We have determined what options should be updated,
* now precalculate device configuration values depending
* on what configuration options need to be updated.
*/
config:
memset(&libconf, 0, sizeof(libconf));
if (flags & CONFIG_UPDATE_PHYMODE) {
band = &rt2x00dev->bands[conf->channel->band];
libconf.band = conf->channel->band;
libconf.basic_rates = rt2x00lib_get_basic_rates(band);
}
if (flags & CONFIG_UPDATE_CHANNEL) {
memcpy(&libconf.rf,
&rt2x00dev->spec.channels[conf->channel->hw_value],
sizeof(libconf.rf));
}
if (flags & CONFIG_UPDATE_ANTENNA) {
if (conf->antenna_sel_rx)
libconf.ant.rx = conf->antenna_sel_rx;
else if (default_ant->rx != ANTENNA_SW_DIVERSITY)
libconf.ant.rx = default_ant->rx;
else if (active_ant->rx == ANTENNA_SW_DIVERSITY)
libconf.ant.rx = ANTENNA_B;
if (conf->antenna_sel_tx)
libconf.ant.tx = conf->antenna_sel_tx;
else if (default_ant->tx != ANTENNA_SW_DIVERSITY)
libconf.ant.tx = default_ant->tx;
else if (active_ant->tx == ANTENNA_SW_DIVERSITY)
libconf.ant.tx = ANTENNA_B;
}
if (flags & CONFIG_UPDATE_SLOT_TIME) {
short_slot_time = conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME;
libconf.slot_time =
short_slot_time ? SHORT_SLOT_TIME : SLOT_TIME;
libconf.sifs = SIFS;
libconf.pifs = short_slot_time ? SHORT_PIFS : PIFS;
libconf.difs = short_slot_time ? SHORT_DIFS : DIFS;
libconf.eifs = EIFS;
}
libconf.conf = conf;
/*
* Start configuration.
*/
rt2x00dev->ops->lib->config(rt2x00dev, &libconf, flags);
/*
* Some configuration changes affect the link quality
* which means we need to reset the link tuner.
*/
if (flags & (CONFIG_UPDATE_CHANNEL | CONFIG_UPDATE_ANTENNA))
rt2x00lib_reset_link_tuner(rt2x00dev);
if (flags & CONFIG_UPDATE_PHYMODE) {
rt2x00dev->curr_band = conf->channel->band;
rt2x00dev->rx_status.band = conf->channel->band;
}
rt2x00dev->rx_status.freq = conf->channel->center_freq;
rt2x00dev->tx_power = conf->power_level;
if (flags & CONFIG_UPDATE_ANTENNA) {
rt2x00dev->link.ant.active.rx = libconf.ant.rx;
rt2x00dev->link.ant.active.tx = libconf.ant.tx;
}
}
