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e25c4bb913
Antenna switching will be ignored when RX is enabled during the switch. Make sure we disable the RX during the switch and don't forget to reenable it later. Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
292 lines
8.3 KiB
C
292 lines
8.3 KiB
C
/*
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Copyright (C) 2004 - 2007 rt2x00 SourceForge Project
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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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/*
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* Set enviroment defines for rt2x00.h
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*/
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#define DRV_NAME "rt2x00lib"
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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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/*
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* The MAC and BSSID addressess are simple array of bytes,
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* these arrays are little endian, so when sending the addressess
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* to the drivers, copy the it into a endian-signed variable.
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*
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* Note that all devices (except rt2500usb) have 32 bits
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* register word sizes. This means that whatever variable we
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* pass _must_ be a multiple of 32 bits. Otherwise the device
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* might not accept what we are sending to it.
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* This will also make it easier for the driver to write
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* the data to the device.
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*
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* Also note that when NULL is passed as address the
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* we will send 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 consideres itself associated.
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*/
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void rt2x00lib_config_mac_addr(struct rt2x00_dev *rt2x00dev, u8 *mac)
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{
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__le32 reg[2];
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memset(®, 0, sizeof(reg));
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if (mac)
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memcpy(®, mac, ETH_ALEN);
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rt2x00dev->ops->lib->config_mac_addr(rt2x00dev, ®[0]);
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}
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void rt2x00lib_config_bssid(struct rt2x00_dev *rt2x00dev, u8 *bssid)
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{
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__le32 reg[2];
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memset(®, 0, sizeof(reg));
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if (bssid)
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memcpy(®, bssid, ETH_ALEN);
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rt2x00dev->ops->lib->config_bssid(rt2x00dev, ®[0]);
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}
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void rt2x00lib_config_type(struct rt2x00_dev *rt2x00dev, const int type)
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{
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int tsf_sync;
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switch (type) {
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case IEEE80211_IF_TYPE_IBSS:
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case IEEE80211_IF_TYPE_AP:
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tsf_sync = TSF_SYNC_BEACON;
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break;
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case IEEE80211_IF_TYPE_STA:
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tsf_sync = TSF_SYNC_INFRA;
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break;
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default:
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tsf_sync = TSF_SYNC_NONE;
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break;
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}
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rt2x00dev->ops->lib->config_type(rt2x00dev, type, tsf_sync);
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}
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void rt2x00lib_config_antenna(struct rt2x00_dev *rt2x00dev,
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enum antenna rx, enum antenna tx)
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{
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struct rt2x00lib_conf libconf;
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libconf.ant.rx = rx;
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libconf.ant.tx = 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_ENABLED_RADIO, &rt2x00dev->flags))
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rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_OFF);
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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(rt2x00dev, CONFIG_UPDATE_ANTENNA, &libconf);
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rt2x00lib_reset_link_tuner(rt2x00dev);
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rt2x00dev->link.ant.active.rx = libconf.ant.rx;
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rt2x00dev->link.ant.active.tx = libconf.ant.tx;
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if (test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
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rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_ON);
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}
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void rt2x00lib_config(struct rt2x00_dev *rt2x00dev,
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struct ieee80211_conf *conf, const int force_config)
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{
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struct rt2x00lib_conf libconf;
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struct ieee80211_hw_mode *mode;
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struct ieee80211_rate *rate;
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struct antenna_setup *default_ant = &rt2x00dev->default_ant;
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struct antenna_setup *active_ant = &rt2x00dev->link.ant.active;
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int flags = 0;
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int short_slot_time;
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/*
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* In some situations we want to force all configurations
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* to be reloaded (When resuming for instance).
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*/
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if (force_config) {
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flags = CONFIG_UPDATE_ALL;
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goto config;
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}
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/*
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* Check which configuration options have been
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* updated and should be send to the device.
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*/
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if (rt2x00dev->rx_status.phymode != conf->phymode)
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flags |= CONFIG_UPDATE_PHYMODE;
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if (rt2x00dev->rx_status.channel != conf->channel)
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flags |= CONFIG_UPDATE_CHANNEL;
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if (rt2x00dev->tx_power != conf->power_level)
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flags |= CONFIG_UPDATE_TXPOWER;
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/*
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* Determining changes in the antenna setups request several checks:
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* antenna_sel_{r,t}x = 0
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* -> Does active_{r,t}x match default_{r,t}x
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* -> Is default_{r,t}x SW_DIVERSITY
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* antenna_sel_{r,t}x = 1/2
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* -> Does active_{r,t}x match antenna_sel_{r,t}x
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* The reason for not updating the antenna while SW diversity
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* should be used is simple: Software diversity means that
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* we should switch between the antenna's based on the
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* quality. This means that the current antenna is good enough
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* to work with untill the link tuner decides that an antenna
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* switch should be performed.
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*/
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if (!conf->antenna_sel_rx &&
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default_ant->rx != ANTENNA_SW_DIVERSITY &&
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default_ant->rx != active_ant->rx)
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flags |= CONFIG_UPDATE_ANTENNA;
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else if (conf->antenna_sel_rx &&
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conf->antenna_sel_rx != active_ant->rx)
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flags |= CONFIG_UPDATE_ANTENNA;
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else if (active_ant->rx == ANTENNA_SW_DIVERSITY)
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flags |= CONFIG_UPDATE_ANTENNA;
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if (!conf->antenna_sel_tx &&
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default_ant->tx != ANTENNA_SW_DIVERSITY &&
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default_ant->tx != active_ant->tx)
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flags |= CONFIG_UPDATE_ANTENNA;
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else if (conf->antenna_sel_tx &&
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conf->antenna_sel_tx != active_ant->tx)
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flags |= CONFIG_UPDATE_ANTENNA;
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else if (active_ant->tx == ANTENNA_SW_DIVERSITY)
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flags |= CONFIG_UPDATE_ANTENNA;
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/*
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* The following configuration options are never
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* stored anywhere and will always be updated.
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*/
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flags |= CONFIG_UPDATE_SLOT_TIME;
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flags |= CONFIG_UPDATE_BEACON_INT;
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/*
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* We have determined what options should be updated,
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* now precalculate device configuration values depending
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* on what configuration options need to be updated.
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*/
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config:
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memset(&libconf, 0, sizeof(libconf));
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if (flags & CONFIG_UPDATE_PHYMODE) {
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switch (conf->phymode) {
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case MODE_IEEE80211A:
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libconf.phymode = HWMODE_A;
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break;
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case MODE_IEEE80211B:
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libconf.phymode = HWMODE_B;
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break;
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case MODE_IEEE80211G:
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libconf.phymode = HWMODE_G;
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break;
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default:
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ERROR(rt2x00dev,
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"Attempt to configure unsupported mode (%d)"
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"Defaulting to 802.11b", conf->phymode);
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libconf.phymode = HWMODE_B;
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}
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mode = &rt2x00dev->hwmodes[libconf.phymode];
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rate = &mode->rates[mode->num_rates - 1];
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libconf.basic_rates =
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DEVICE_GET_RATE_FIELD(rate->val, RATEMASK) & DEV_BASIC_RATEMASK;
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}
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if (flags & CONFIG_UPDATE_CHANNEL) {
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memcpy(&libconf.rf,
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&rt2x00dev->spec.channels[conf->channel_val],
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sizeof(libconf.rf));
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}
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if (flags & CONFIG_UPDATE_ANTENNA) {
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if (conf->antenna_sel_rx)
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libconf.ant.rx = conf->antenna_sel_rx;
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else if (default_ant->rx != ANTENNA_SW_DIVERSITY)
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libconf.ant.rx = default_ant->rx;
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else if (active_ant->rx == ANTENNA_SW_DIVERSITY)
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libconf.ant.rx = ANTENNA_B;
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if (conf->antenna_sel_tx)
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libconf.ant.tx = conf->antenna_sel_tx;
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else if (default_ant->tx != ANTENNA_SW_DIVERSITY)
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libconf.ant.tx = default_ant->tx;
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else if (active_ant->tx == ANTENNA_SW_DIVERSITY)
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libconf.ant.tx = ANTENNA_B;
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}
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if (flags & CONFIG_UPDATE_SLOT_TIME) {
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short_slot_time = conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME;
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libconf.slot_time =
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short_slot_time ? SHORT_SLOT_TIME : SLOT_TIME;
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libconf.sifs = SIFS;
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libconf.pifs = short_slot_time ? SHORT_PIFS : PIFS;
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libconf.difs = short_slot_time ? SHORT_DIFS : DIFS;
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libconf.eifs = EIFS;
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}
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libconf.conf = conf;
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/*
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* Start configuration.
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*/
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rt2x00dev->ops->lib->config(rt2x00dev, flags, &libconf);
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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 (flags & (CONFIG_UPDATE_CHANNEL | CONFIG_UPDATE_ANTENNA))
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rt2x00lib_reset_link_tuner(rt2x00dev);
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if (flags & CONFIG_UPDATE_PHYMODE) {
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rt2x00dev->curr_hwmode = libconf.phymode;
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rt2x00dev->rx_status.phymode = conf->phymode;
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}
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rt2x00dev->rx_status.freq = conf->freq;
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rt2x00dev->rx_status.channel = conf->channel;
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rt2x00dev->tx_power = conf->power_level;
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if (flags & CONFIG_UPDATE_ANTENNA) {
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rt2x00dev->link.ant.active.rx = libconf.ant.rx;
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rt2x00dev->link.ant.active.tx = libconf.ant.tx;
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}
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}
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