drivers/net/wireless/iwlwifi/iwl-core.c

   1 /******************************************************************************
   2  *
   3  * GPL LICENSE SUMMARY
   4  *
   5  * Copyright(c) 2008 Intel Corporation. All rights reserved.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of version 2 of the GNU General Public License as
   9  * published by the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  19  * USA
  20  *
  21  * The full GNU General Public License is included in this distribution
  22  * in the file called LICENSE.GPL.
  23  *
  24  * Contact Information:
  25  * Tomas Winkler <tomas.winkler@intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *****************************************************************************/
  28
  29 #include <linux/kernel.h>
  30 #include <linux/module.h>
  31 #include <linux/version.h>
  32 #include <net/mac80211.h>
  33
  34 struct iwl_priv; /* FIXME: remove */
  35 #include "iwl-debug.h"
  36 #include "iwl-eeprom.h"
  37 #include "iwl-4965.h" /* FIXME: remove */
  38 #include "iwl-core.h"
  39 #include "iwl-rfkill.h"
  40 #include "iwl-power.h"
  41
  42
  43 MODULE_DESCRIPTION("iwl core");
  44 MODULE_VERSION(IWLWIFI_VERSION);
  45 MODULE_AUTHOR(DRV_COPYRIGHT);
  46 MODULE_LICENSE("GPL");
  47
  48 #ifdef CONFIG_IWLWIFI_DEBUG
  49 u32 iwl_debug_level;
  50 EXPORT_SYMBOL(iwl_debug_level);
  51 #endif
  52
  53 /* This function both allocates and initializes hw and priv. */
  54 struct ieee80211_hw *iwl_alloc_all(struct iwl_cfg *cfg,
  55                 struct ieee80211_ops *hw_ops)
  56 {
  57         struct iwl_priv *priv;
  58
  59         /* mac80211 allocates memory for this device instance, including
  60          *   space for this driver's private structure */
  61         struct ieee80211_hw *hw =
  62                 ieee80211_alloc_hw(sizeof(struct iwl_priv), hw_ops);
  63         if (hw == NULL) {
  64                 IWL_ERROR("Can not allocate network device\n");
  65                 goto out;
  66         }
  67
  68         priv = hw->priv;
  69         priv->hw = hw;
  70
  71 out:
  72         return hw;
  73 }
  74 EXPORT_SYMBOL(iwl_alloc_all);
  75
  76 /**
  77  * iwlcore_clear_stations_table - Clear the driver's station table
  78  *
  79  * NOTE:  This does not clear or otherwise alter the device's station table.
  80  */
  81 void iwlcore_clear_stations_table(struct iwl_priv *priv)
  82 {
  83         unsigned long flags;
  84
  85         spin_lock_irqsave(&priv->sta_lock, flags);
  86
  87         priv->num_stations = 0;
  88         memset(priv->stations, 0, sizeof(priv->stations));
  89
  90         spin_unlock_irqrestore(&priv->sta_lock, flags);
  91 }
  92 EXPORT_SYMBOL(iwlcore_clear_stations_table);
  93
  94 void iwlcore_reset_qos(struct iwl_priv *priv)
  95 {
  96         u16 cw_min = 15;
  97         u16 cw_max = 1023;
  98         u8 aifs = 2;
  99         u8 is_legacy = 0;
 100         unsigned long flags;
 101         int i;
 102
 103         spin_lock_irqsave(&priv->lock, flags);
 104         priv->qos_data.qos_active = 0;
 105
 106         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS) {
 107                 if (priv->qos_data.qos_enable)
 108                         priv->qos_data.qos_active = 1;
 109                 if (!(priv->active_rate & 0xfff0)) {
 110                         cw_min = 31;
 111                         is_legacy = 1;
 112                 }
 113         } else if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
 114                 if (priv->qos_data.qos_enable)
 115                         priv->qos_data.qos_active = 1;
 116         } else if (!(priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK)) {
 117                 cw_min = 31;
 118                 is_legacy = 1;
 119         }
 120
 121         if (priv->qos_data.qos_active)
 122                 aifs = 3;
 123
 124         priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
 125         priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
 126         priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
 127         priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
 128         priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;
 129
 130         if (priv->qos_data.qos_active) {
 131                 i = 1;
 132                 priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
 133                 priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
 134                 priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
 135                 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
 136                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 137
 138                 i = 2;
 139                 priv->qos_data.def_qos_parm.ac[i].cw_min =
 140                         cpu_to_le16((cw_min + 1) / 2 - 1);
 141                 priv->qos_data.def_qos_parm.ac[i].cw_max =
 142                         cpu_to_le16(cw_max);
 143                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
 144                 if (is_legacy)
 145                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 146                                 cpu_to_le16(6016);
 147                 else
 148                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 149                                 cpu_to_le16(3008);
 150                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 151
 152                 i = 3;
 153                 priv->qos_data.def_qos_parm.ac[i].cw_min =
 154                         cpu_to_le16((cw_min + 1) / 4 - 1);
 155                 priv->qos_data.def_qos_parm.ac[i].cw_max =
 156                         cpu_to_le16((cw_max + 1) / 2 - 1);
 157                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
 158                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 159                 if (is_legacy)
 160                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 161                                 cpu_to_le16(3264);
 162                 else
 163                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 164                                 cpu_to_le16(1504);
 165         } else {
 166                 for (i = 1; i < 4; i++) {
 167                         priv->qos_data.def_qos_parm.ac[i].cw_min =
 168                                 cpu_to_le16(cw_min);
 169                         priv->qos_data.def_qos_parm.ac[i].cw_max =
 170                                 cpu_to_le16(cw_max);
 171                         priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
 172                         priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
 173                         priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 174                 }
 175         }
 176         IWL_DEBUG_QOS("set QoS to default \n");
 177
 178         spin_unlock_irqrestore(&priv->lock, flags);
 179 }
 180 EXPORT_SYMBOL(iwlcore_reset_qos);
 181
 182 /**
 183  * iwlcore_set_rxon_channel - Set the phymode and channel values in staging RXON
 184  * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
 185  * @channel: Any channel valid for the requested phymode
 186
 187  * In addition to setting the staging RXON, priv->phymode is also set.
 188  *
 189  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 190  * in the staging RXON flag structure based on the phymode
 191  */
 192 int iwlcore_set_rxon_channel(struct iwl_priv *priv,
 193                                 enum ieee80211_band band,
 194                                 u16 channel)
 195 {
 196         if (!iwl_get_channel_info(priv, band, channel)) {
 197                 IWL_DEBUG_INFO("Could not set channel to %d [%d]\n",
 198                                channel, band);
 199                 return -EINVAL;
 200         }
 201
 202         if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
 203             (priv->band == band))
 204                 return 0;
 205
 206         priv->staging_rxon.channel = cpu_to_le16(channel);
 207         if (band == IEEE80211_BAND_5GHZ)
 208                 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
 209         else
 210                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 211
 212         priv->band = band;
 213
 214         IWL_DEBUG_INFO("Staging channel set to %d [%d]\n", channel, band);
 215
 216         return 0;
 217 }
 218 EXPORT_SYMBOL(iwlcore_set_rxon_channel);
 219
 220 static void iwlcore_init_hw(struct iwl_priv *priv)
 221 {
 222         struct ieee80211_hw *hw = priv->hw;
 223         hw->rate_control_algorithm = "iwl-4965-rs";
 224
 225         /* Tell mac80211 and its clients (e.g. Wireless Extensions)
 226          *       the range of signal quality values that we'll provide.
 227          * Negative values for level/noise indicate that we'll provide dBm.
 228          * For WE, at least, non-0 values here *enable* display of values
 229          *       in app (iwconfig). */
 230         hw->max_rssi = -20; /* signal level, negative indicates dBm */
 231         hw->max_noise = -20;    /* noise level, negative indicates dBm */
 232         hw->max_signal = 100;   /* link quality indication (%) */
 233
 234         /* Tell mac80211 our Tx characteristics */
 235         hw->flags = IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE;
 236
 237         /* Default value; 4 EDCA QOS priorities */
 238         hw->queues = 4;
 239 #ifdef CONFIG_IWL4965_HT
 240         /* Enhanced value; more queues, to support 11n aggregation */
 241         hw->queues = 16;
 242 #endif /* CONFIG_IWL4965_HT */
 243 }
 244
 245 int iwl_setup(struct iwl_priv *priv)
 246 {
 247         int ret = 0;
 248         iwlcore_init_hw(priv);
 249         ret = priv->cfg->ops->lib->init_drv(priv);
 250         return ret;
 251 }
 252 EXPORT_SYMBOL(iwl_setup);
 253
 254 /* Low level driver call this function to update iwlcore with
 255  * driver status.
 256  */
 257 int iwlcore_low_level_notify(struct iwl_priv *priv,
 258                               enum iwlcore_card_notify notify)
 259 {
 260         int ret;
 261         switch (notify) {
 262         case IWLCORE_INIT_EVT:
 263                 ret = iwl_rfkill_init(priv);
 264                 if (ret)
 265                         IWL_ERROR("Unable to initialize RFKILL system. "
 266                                   "Ignoring error: %d\n", ret);
 267                 iwl_power_initialize(priv);
 268                 break;
 269         case IWLCORE_START_EVT:
 270                 iwl_power_update_mode(priv, 1);
 271                 break;
 272         case IWLCORE_STOP_EVT:
 273                 break;
 274         case IWLCORE_REMOVE_EVT:
 275                 iwl_rfkill_unregister(priv);
 276                 break;
 277         }
 278
 279         return 0;
 280 }
 281 EXPORT_SYMBOL(iwlcore_low_level_notify);
 282
 283 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags)
 284 {
 285         u32 stat_flags = 0;
 286         struct iwl_host_cmd cmd = {
 287                 .id = REPLY_STATISTICS_CMD,
 288                 .meta.flags = flags,
 289                 .len = sizeof(stat_flags),
 290                 .data = (u8 *) &stat_flags,
 291         };
 292         return iwl_send_cmd(priv, &cmd);
 293 }
 294 EXPORT_SYMBOL(iwl_send_statistics_request);
 295