| 1 | /* |
| 2 | Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com> |
| 3 | <http://rt2x00.serialmonkey.com> |
| 4 | |
| 5 | This program is free software; you can redistribute it and/or modify |
| 6 | it under the terms of the GNU General Public License as published by |
| 7 | the Free Software Foundation; either version 2 of the License, or |
| 8 | (at your option) any later version. |
| 9 | |
| 10 | This program is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | GNU General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU General Public License |
| 16 | along with this program; if not, write to the |
| 17 | Free Software Foundation, Inc., |
| 18 | 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 19 | */ |
| 20 | |
| 21 | /* |
| 22 | Module: rt2x00lib |
| 23 | Abstract: rt2x00 generic configuration routines. |
| 24 | */ |
| 25 | |
| 26 | #include <linux/kernel.h> |
| 27 | #include <linux/module.h> |
| 28 | |
| 29 | #include "rt2x00.h" |
| 30 | #include "rt2x00lib.h" |
| 31 | |
| 32 | void rt2x00lib_config_intf(struct rt2x00_dev *rt2x00dev, |
| 33 | struct rt2x00_intf *intf, |
| 34 | enum nl80211_iftype type, |
| 35 | const u8 *mac, const u8 *bssid) |
| 36 | { |
| 37 | struct rt2x00intf_conf conf; |
| 38 | unsigned int flags = 0; |
| 39 | |
| 40 | conf.type = type; |
| 41 | |
| 42 | switch (type) { |
| 43 | case NL80211_IFTYPE_ADHOC: |
| 44 | conf.sync = TSF_SYNC_ADHOC; |
| 45 | break; |
| 46 | case NL80211_IFTYPE_AP: |
| 47 | case NL80211_IFTYPE_MESH_POINT: |
| 48 | case NL80211_IFTYPE_WDS: |
| 49 | conf.sync = TSF_SYNC_AP_NONE; |
| 50 | break; |
| 51 | case NL80211_IFTYPE_STATION: |
| 52 | conf.sync = TSF_SYNC_INFRA; |
| 53 | break; |
| 54 | default: |
| 55 | conf.sync = TSF_SYNC_NONE; |
| 56 | break; |
| 57 | } |
| 58 | |
| 59 | /* |
| 60 | * Note that when NULL is passed as address we will send |
| 61 | * 00:00:00:00:00 to the device to clear the address. |
| 62 | * This will prevent the device being confused when it wants |
| 63 | * to ACK frames or consideres itself associated. |
| 64 | */ |
| 65 | memset(&conf.mac, 0, sizeof(conf.mac)); |
| 66 | if (mac) |
| 67 | memcpy(&conf.mac, mac, ETH_ALEN); |
| 68 | |
| 69 | memset(&conf.bssid, 0, sizeof(conf.bssid)); |
| 70 | if (bssid) |
| 71 | memcpy(&conf.bssid, bssid, ETH_ALEN); |
| 72 | |
| 73 | flags |= CONFIG_UPDATE_TYPE; |
| 74 | if (mac || (!rt2x00dev->intf_ap_count && !rt2x00dev->intf_sta_count)) |
| 75 | flags |= CONFIG_UPDATE_MAC; |
| 76 | if (bssid || (!rt2x00dev->intf_ap_count && !rt2x00dev->intf_sta_count)) |
| 77 | flags |= CONFIG_UPDATE_BSSID; |
| 78 | |
| 79 | rt2x00dev->ops->lib->config_intf(rt2x00dev, intf, &conf, flags); |
| 80 | } |
| 81 | |
| 82 | void rt2x00lib_config_erp(struct rt2x00_dev *rt2x00dev, |
| 83 | struct rt2x00_intf *intf, |
| 84 | struct ieee80211_bss_conf *bss_conf, |
| 85 | u32 changed) |
| 86 | { |
| 87 | struct rt2x00lib_erp erp; |
| 88 | |
| 89 | memset(&erp, 0, sizeof(erp)); |
| 90 | |
| 91 | erp.short_preamble = bss_conf->use_short_preamble; |
| 92 | erp.cts_protection = bss_conf->use_cts_prot; |
| 93 | |
| 94 | erp.slot_time = bss_conf->use_short_slot ? SHORT_SLOT_TIME : SLOT_TIME; |
| 95 | erp.sifs = SIFS; |
| 96 | erp.pifs = bss_conf->use_short_slot ? SHORT_PIFS : PIFS; |
| 97 | erp.difs = bss_conf->use_short_slot ? SHORT_DIFS : DIFS; |
| 98 | erp.eifs = bss_conf->use_short_slot ? SHORT_EIFS : EIFS; |
| 99 | |
| 100 | erp.basic_rates = bss_conf->basic_rates; |
| 101 | erp.beacon_int = bss_conf->beacon_int; |
| 102 | |
| 103 | /* Update global beacon interval time, this is needed for PS support */ |
| 104 | rt2x00dev->beacon_int = bss_conf->beacon_int; |
| 105 | |
| 106 | if (changed & BSS_CHANGED_HT) |
| 107 | erp.ht_opmode = bss_conf->ht_operation_mode; |
| 108 | |
| 109 | rt2x00dev->ops->lib->config_erp(rt2x00dev, &erp, changed); |
| 110 | } |
| 111 | |
| 112 | static inline |
| 113 | enum antenna rt2x00lib_config_antenna_check(enum antenna current_ant, |
| 114 | enum antenna default_ant) |
| 115 | { |
| 116 | if (current_ant != ANTENNA_SW_DIVERSITY) |
| 117 | return current_ant; |
| 118 | return (default_ant != ANTENNA_SW_DIVERSITY) ? default_ant : ANTENNA_B; |
| 119 | } |
| 120 | |
| 121 | void rt2x00lib_config_antenna(struct rt2x00_dev *rt2x00dev, |
| 122 | struct antenna_setup config) |
| 123 | { |
| 124 | struct link_ant *ant = &rt2x00dev->link.ant; |
| 125 | struct antenna_setup *def = &rt2x00dev->default_ant; |
| 126 | struct antenna_setup *active = &rt2x00dev->link.ant.active; |
| 127 | |
| 128 | /* |
| 129 | * Failsafe: Make sure we are not sending the |
| 130 | * ANTENNA_SW_DIVERSITY state to the driver. |
| 131 | * If that happens, fallback to hardware defaults, |
| 132 | * or our own default. |
| 133 | */ |
| 134 | if (!(ant->flags & ANTENNA_RX_DIVERSITY)) |
| 135 | config.rx = rt2x00lib_config_antenna_check(config.rx, def->rx); |
| 136 | else if (config.rx == ANTENNA_SW_DIVERSITY) |
| 137 | config.rx = active->rx; |
| 138 | |
| 139 | if (!(ant->flags & ANTENNA_TX_DIVERSITY)) |
| 140 | config.tx = rt2x00lib_config_antenna_check(config.tx, def->tx); |
| 141 | else if (config.tx == ANTENNA_SW_DIVERSITY) |
| 142 | config.tx = active->tx; |
| 143 | |
| 144 | /* |
| 145 | * Antenna setup changes require the RX to be disabled, |
| 146 | * else the changes will be ignored by the device. |
| 147 | */ |
| 148 | if (test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags)) |
| 149 | rt2x00dev->ops->lib->stop_queue(rt2x00dev->rx); |
| 150 | |
| 151 | /* |
| 152 | * Write new antenna setup to device and reset the link tuner. |
| 153 | * The latter is required since we need to recalibrate the |
| 154 | * noise-sensitivity ratio for the new setup. |
| 155 | */ |
| 156 | rt2x00dev->ops->lib->config_ant(rt2x00dev, &config); |
| 157 | |
| 158 | rt2x00link_reset_tuner(rt2x00dev, true); |
| 159 | |
| 160 | memcpy(active, &config, sizeof(config)); |
| 161 | |
| 162 | if (test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags)) |
| 163 | rt2x00dev->ops->lib->start_queue(rt2x00dev->rx); |
| 164 | } |
| 165 | |
| 166 | void rt2x00lib_config(struct rt2x00_dev *rt2x00dev, |
| 167 | struct ieee80211_conf *conf, |
| 168 | unsigned int ieee80211_flags) |
| 169 | { |
| 170 | struct rt2x00lib_conf libconf; |
| 171 | u16 hw_value; |
| 172 | |
| 173 | memset(&libconf, 0, sizeof(libconf)); |
| 174 | |
| 175 | libconf.conf = conf; |
| 176 | |
| 177 | if (ieee80211_flags & IEEE80211_CONF_CHANGE_CHANNEL) { |
| 178 | if (conf_is_ht40(conf)) { |
| 179 | __set_bit(CONFIG_CHANNEL_HT40, &rt2x00dev->flags); |
| 180 | hw_value = rt2x00ht_center_channel(rt2x00dev, conf); |
| 181 | } else { |
| 182 | __clear_bit(CONFIG_CHANNEL_HT40, &rt2x00dev->flags); |
| 183 | hw_value = conf->channel->hw_value; |
| 184 | } |
| 185 | |
| 186 | memcpy(&libconf.rf, |
| 187 | &rt2x00dev->spec.channels[hw_value], |
| 188 | sizeof(libconf.rf)); |
| 189 | |
| 190 | memcpy(&libconf.channel, |
| 191 | &rt2x00dev->spec.channels_info[hw_value], |
| 192 | sizeof(libconf.channel)); |
| 193 | } |
| 194 | |
| 195 | /* |
| 196 | * Start configuration. |
| 197 | */ |
| 198 | rt2x00dev->ops->lib->config(rt2x00dev, &libconf, ieee80211_flags); |
| 199 | |
| 200 | /* |
| 201 | * Some configuration changes affect the link quality |
| 202 | * which means we need to reset the link tuner. |
| 203 | */ |
| 204 | if (ieee80211_flags & IEEE80211_CONF_CHANGE_CHANNEL) |
| 205 | rt2x00link_reset_tuner(rt2x00dev, false); |
| 206 | |
| 207 | rt2x00dev->curr_band = conf->channel->band; |
| 208 | rt2x00dev->curr_freq = conf->channel->center_freq; |
| 209 | rt2x00dev->tx_power = conf->power_level; |
| 210 | rt2x00dev->short_retry = conf->short_frame_max_tx_count; |
| 211 | rt2x00dev->long_retry = conf->long_frame_max_tx_count; |
| 212 | } |