/*
Copyright (C) 2004 - 2007 rt2x00 SourceForge Project
<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"
/*
* The MAC and BSSID addressess are simple array of bytes,
* these arrays are little endian, so when sending the addressess
* to the drivers, copy the it into a endian-signed variable.
*
* Note that all devices (except rt2500usb) have 32 bits
* register word sizes. This means that whatever variable we
* pass _must_ be a multiple of 32 bits. Otherwise the device
* might not accept what we are sending to it.
* This will also make it easier for the driver to write
* the data to the device.
*
* Also note that when NULL is passed as address the
* 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 consideres itself associated.
*/
void rt2x00lib_config_mac_addr(struct rt2x00_dev *rt2x00dev, u8 *mac)
{
__le32 reg[2];
memset(®, 0, sizeof(reg));
if (mac)
memcpy(®, mac, ETH_ALEN);
rt2x00dev->ops->lib->config_mac_addr(rt2x00dev, ®[0]);
}
void rt2x00lib_config_bssid(struct rt2x00_dev *rt2x00dev, u8 *bssid)
{
__le32 reg[2];
memset(®, 0, sizeof(reg));
if (bssid)
memcpy(®, bssid, ETH_ALEN);
rt2x00dev->ops->lib->config_bssid(rt2x00dev, ®[0]);
}
void rt2x00lib_config_type(struct rt2x00_dev *rt2x00dev, const int type)
{
int tsf_sync;
switch (type) {
case IEEE80211_IF_TYPE_IBSS:
case IEEE80211_IF_TYPE_AP:
tsf_sync = TSF_SYNC_BEACON;
break;
case IEEE80211_IF_TYPE_STA:
tsf_sync = TSF_SYNC_INFRA;
break;
default:
tsf_sync = TSF_SYNC_NONE;
break;
}
rt2x00dev->ops->lib->config_type(rt2x00dev, type, tsf_sync);
}
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, CONFIG_UPDATE_ANTENNA, &libconf);
rt2x00lib_reset_link_tuner(rt2x00dev);
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);
}
void rt2x00lib_config(struct rt2x00_dev *rt2x00dev,
struct ieee80211_conf *conf, const int force_config)
{
struct rt2x00lib_conf libconf;
struct ieee80211_hw_mode *mode;
struct ieee80211_rate *rate;
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.phymode != conf->phymode)
flags |= CONFIG_UPDATE_PHYMODE;
if (rt2x00dev->rx_status.channel != conf->channel)
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) {
switch (conf->phymode) {
case MODE_IEEE80211A:
libconf.phymode = HWMODE_A;
break;
case MODE_IEEE80211B:
libconf.phymode = HWMODE_B;
break;
case MODE_IEEE80211G:
libconf.phymode = HWMODE_G;
break;
default:
ERROR(rt2x00dev,
"Attempt to configure unsupported mode (%d)"
"Defaulting to 802.11b", conf->phymode);
libconf.phymode = HWMODE_B;
}
mode = &rt2x00dev->hwmodes[libconf.phymode];
rate = &mode->rates[mode->num_rates - 1];
libconf.basic_rates =
DEVICE_GET_RATE_FIELD(rate->val, RATEMASK) & DEV_BASIC_RATEMASK;
}
if (flags & CONFIG_UPDATE_CHANNEL) {
memcpy(&libconf.rf,
&rt2x00dev->spec.channels[conf->channel_val],
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, flags, &libconf);
/*
* 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_hwmode = libconf.phymode;
rt2x00dev->rx_status.phymode = conf->phymode;
}
rt2x00dev->rx_status.freq = conf->freq;
rt2x00dev->rx_status.channel = conf->channel;
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;
}
}
