drivers/net/wireless/ralink/rt2x00/rt2x00config.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3         Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com>
   4         <http://rt2x00.serialmonkey.com>
   5
   6  */
   7
   8 /*
   9         Module: rt2x00lib
  10         Abstract: rt2x00 generic configuration routines.
  11  */
  12
  13 #include <linux/kernel.h>
  14 #include <linux/module.h>
  15
  16 #include "rt2x00.h"
  17 #include "rt2x00lib.h"
  18
  19 void rt2x00lib_config_intf(struct rt2x00_dev *rt2x00dev,
  20                            struct rt2x00_intf *intf,
  21                            enum nl80211_iftype type,
  22                            const u8 *mac, const u8 *bssid)
  23 {
  24         struct rt2x00intf_conf conf;
  25         unsigned int flags = 0;
  26
  27         conf.type = type;
  28
  29         switch (type) {
  30         case NL80211_IFTYPE_ADHOC:
  31                 conf.sync = TSF_SYNC_ADHOC;
  32                 break;
  33         case NL80211_IFTYPE_AP:
  34         case NL80211_IFTYPE_MESH_POINT:
  35                 conf.sync = TSF_SYNC_AP_NONE;
  36                 break;
  37         case NL80211_IFTYPE_STATION:
  38                 conf.sync = TSF_SYNC_INFRA;
  39                 break;
  40         default:
  41                 conf.sync = TSF_SYNC_NONE;
  42                 break;
  43         }
  44
  45         /*
  46          * Note that when NULL is passed as address we will send
  47          * 00:00:00:00:00 to the device to clear the address.
  48          * This will prevent the device being confused when it wants
  49          * to ACK frames or considers itself associated.
  50          */
  51         memset(conf.mac, 0, sizeof(conf.mac));
  52         if (mac)
  53                 memcpy(conf.mac, mac, ETH_ALEN);
  54
  55         memset(conf.bssid, 0, sizeof(conf.bssid));
  56         if (bssid)
  57                 memcpy(conf.bssid, bssid, ETH_ALEN);
  58
  59         flags |= CONFIG_UPDATE_TYPE;
  60         if (mac || (!rt2x00dev->intf_ap_count && !rt2x00dev->intf_sta_count))
  61                 flags |= CONFIG_UPDATE_MAC;
  62         if (bssid || (!rt2x00dev->intf_ap_count && !rt2x00dev->intf_sta_count))
  63                 flags |= CONFIG_UPDATE_BSSID;
  64
  65         rt2x00dev->ops->lib->config_intf(rt2x00dev, intf, &conf, flags);
  66 }
  67
  68 void rt2x00lib_config_erp(struct rt2x00_dev *rt2x00dev,
  69                           struct rt2x00_intf *intf,
  70                           struct ieee80211_bss_conf *bss_conf,
  71                           u32 changed)
  72 {
  73         struct rt2x00lib_erp erp;
  74
  75         memset(&erp, 0, sizeof(erp));
  76
  77         erp.short_preamble = bss_conf->use_short_preamble;
  78         erp.cts_protection = bss_conf->use_cts_prot;
  79
  80         erp.slot_time = bss_conf->use_short_slot ? SHORT_SLOT_TIME : SLOT_TIME;
  81         erp.sifs = SIFS;
  82         erp.pifs = bss_conf->use_short_slot ? SHORT_PIFS : PIFS;
  83         erp.difs = bss_conf->use_short_slot ? SHORT_DIFS : DIFS;
  84         erp.eifs = bss_conf->use_short_slot ? SHORT_EIFS : EIFS;
  85
  86         erp.basic_rates = bss_conf->basic_rates;
  87         erp.beacon_int = bss_conf->beacon_int;
  88
  89         /* Update the AID, this is needed for dynamic PS support */
  90         rt2x00dev->aid = bss_conf->assoc ? bss_conf->aid : 0;
  91         rt2x00dev->last_beacon = bss_conf->sync_tsf;
  92
  93         /* Update global beacon interval time, this is needed for PS support */
  94         rt2x00dev->beacon_int = bss_conf->beacon_int;
  95
  96         if (changed & BSS_CHANGED_HT)
  97                 erp.ht_opmode = bss_conf->ht_operation_mode;
  98
  99         rt2x00dev->ops->lib->config_erp(rt2x00dev, &erp, changed);
 100 }
 101
 102 void rt2x00lib_config_antenna(struct rt2x00_dev *rt2x00dev,
 103                               struct antenna_setup config)
 104 {
 105         struct link_ant *ant = &rt2x00dev->link.ant;
 106         struct antenna_setup *def = &rt2x00dev->default_ant;
 107         struct antenna_setup *active = &rt2x00dev->link.ant.active;
 108
 109         /*
 110          * When the caller tries to send the SW diversity,
 111          * we must update the ANTENNA_RX_DIVERSITY flag to
 112          * enable the antenna diversity in the link tuner.
 113          *
 114          * Secondly, we must guarentee we never send the
 115          * software antenna diversity command to the driver.
 116          */
 117         if (!(ant->flags & ANTENNA_RX_DIVERSITY)) {
 118                 if (config.rx == ANTENNA_SW_DIVERSITY) {
 119                         ant->flags |= ANTENNA_RX_DIVERSITY;
 120
 121                         if (def->rx == ANTENNA_SW_DIVERSITY)
 122                                 config.rx = ANTENNA_B;
 123                         else
 124                                 config.rx = def->rx;
 125                 }
 126         } else if (config.rx == ANTENNA_SW_DIVERSITY)
 127                 config.rx = active->rx;
 128
 129         if (!(ant->flags & ANTENNA_TX_DIVERSITY)) {
 130                 if (config.tx == ANTENNA_SW_DIVERSITY) {
 131                         ant->flags |= ANTENNA_TX_DIVERSITY;
 132
 133                         if (def->tx == ANTENNA_SW_DIVERSITY)
 134                                 config.tx = ANTENNA_B;
 135                         else
 136                                 config.tx = def->tx;
 137                 }
 138         } else if (config.tx == ANTENNA_SW_DIVERSITY)
 139                 config.tx = active->tx;
 140
 141         /*
 142          * Antenna setup changes require the RX to be disabled,
 143          * else the changes will be ignored by the device.
 144          */
 145         if (test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
 146                 rt2x00queue_stop_queue(rt2x00dev->rx);
 147
 148         /*
 149          * Write new antenna setup to device and reset the link tuner.
 150          * The latter is required since we need to recalibrate the
 151          * noise-sensitivity ratio for the new setup.
 152          */
 153         rt2x00dev->ops->lib->config_ant(rt2x00dev, &config);
 154
 155         rt2x00link_reset_tuner(rt2x00dev, true);
 156
 157         memcpy(active, &config, sizeof(config));
 158
 159         if (test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
 160                 rt2x00queue_start_queue(rt2x00dev->rx);
 161 }
 162
 163 static u16 rt2x00ht_center_channel(struct rt2x00_dev *rt2x00dev,
 164                                    struct ieee80211_conf *conf)
 165 {
 166         struct hw_mode_spec *spec = &rt2x00dev->spec;
 167         int center_channel;
 168         u16 i;
 169
 170         /*
 171          * Initialize center channel to current channel.
 172          */
 173         center_channel = spec->channels[conf->chandef.chan->hw_value].channel;
 174
 175         /*
 176          * Adjust center channel to HT40+ and HT40- operation.
 177          */
 178         if (conf_is_ht40_plus(conf))
 179                 center_channel += 2;
 180         else if (conf_is_ht40_minus(conf))
 181                 center_channel -= (center_channel == 14) ? 1 : 2;
 182
 183         for (i = 0; i < spec->num_channels; i++)
 184                 if (spec->channels[i].channel == center_channel)
 185                         return i;
 186
 187         WARN_ON(1);
 188         return conf->chandef.chan->hw_value;
 189 }
 190
 191 void rt2x00lib_config(struct rt2x00_dev *rt2x00dev,
 192                       struct ieee80211_conf *conf,
 193                       unsigned int ieee80211_flags)
 194 {
 195         struct rt2x00lib_conf libconf;
 196         u16 hw_value;
 197         u16 autowake_timeout;
 198         u16 beacon_int;
 199         u16 beacon_diff;
 200
 201         memset(&libconf, 0, sizeof(libconf));
 202
 203         libconf.conf = conf;
 204
 205         if (ieee80211_flags & IEEE80211_CONF_CHANGE_CHANNEL) {
 206                 if (!conf_is_ht(conf))
 207                         set_bit(CONFIG_HT_DISABLED, &rt2x00dev->flags);
 208                 else
 209                         clear_bit(CONFIG_HT_DISABLED, &rt2x00dev->flags);
 210
 211                 if (conf_is_ht40(conf)) {
 212                         set_bit(CONFIG_CHANNEL_HT40, &rt2x00dev->flags);
 213                         hw_value = rt2x00ht_center_channel(rt2x00dev, conf);
 214                 } else {
 215                         clear_bit(CONFIG_CHANNEL_HT40, &rt2x00dev->flags);
 216                         hw_value = conf->chandef.chan->hw_value;
 217                 }
 218
 219                 memcpy(&libconf.rf,
 220                        &rt2x00dev->spec.channels[hw_value],
 221                        sizeof(libconf.rf));
 222
 223                 memcpy(&libconf.channel,
 224                        &rt2x00dev->spec.channels_info[hw_value],
 225                        sizeof(libconf.channel));
 226
 227                 /* Used for VCO periodic calibration */
 228                 rt2x00dev->rf_channel = libconf.rf.channel;
 229         }
 230
 231         if (rt2x00_has_cap_flag(rt2x00dev, REQUIRE_PS_AUTOWAKE) &&
 232             (ieee80211_flags & IEEE80211_CONF_CHANGE_PS))
 233                 cancel_delayed_work_sync(&rt2x00dev->autowakeup_work);
 234
 235         /*
 236          * Start configuration.
 237          */
 238         rt2x00dev->ops->lib->config(rt2x00dev, &libconf, ieee80211_flags);
 239
 240         if (conf->flags & IEEE80211_CONF_PS)
 241                 set_bit(CONFIG_POWERSAVING, &rt2x00dev->flags);
 242         else
 243                 clear_bit(CONFIG_POWERSAVING, &rt2x00dev->flags);
 244
 245         if (conf->flags & IEEE80211_CONF_MONITOR)
 246                 set_bit(CONFIG_MONITORING, &rt2x00dev->flags);
 247         else
 248                 clear_bit(CONFIG_MONITORING, &rt2x00dev->flags);
 249
 250         rt2x00dev->curr_band = conf->chandef.chan->band;
 251         rt2x00dev->curr_freq = conf->chandef.chan->center_freq;
 252         rt2x00dev->tx_power = conf->power_level;
 253         rt2x00dev->short_retry = conf->short_frame_max_tx_count;
 254         rt2x00dev->long_retry = conf->long_frame_max_tx_count;
 255
 256         /*
 257          * Some configuration changes affect the link quality
 258          * which means we need to reset the link tuner.
 259          */
 260         if (ieee80211_flags & IEEE80211_CONF_CHANGE_CHANNEL)
 261                 rt2x00link_reset_tuner(rt2x00dev, false);
 262
 263         if (test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags) &&
 264             rt2x00_has_cap_flag(rt2x00dev, REQUIRE_PS_AUTOWAKE) &&
 265             (ieee80211_flags & IEEE80211_CONF_CHANGE_PS) &&
 266             (conf->flags & IEEE80211_CONF_PS)) {
 267                 beacon_diff = (long)jiffies - (long)rt2x00dev->last_beacon;
 268                 beacon_int = msecs_to_jiffies(rt2x00dev->beacon_int);
 269
 270                 if (beacon_diff > beacon_int)
 271                         beacon_diff = 0;
 272
 273                 autowake_timeout = (conf->ps_dtim_period * beacon_int) - beacon_diff;
 274                 queue_delayed_work(rt2x00dev->workqueue,
 275                                    &rt2x00dev->autowakeup_work,
 276                                    autowake_timeout - 15);
 277         }
 278 }