SAFE public projects git trees. - safe/jmp/linux-2.6/blob - 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
  41
  42 MODULE_DESCRIPTION("iwl core");
  43 MODULE_VERSION(IWLWIFI_VERSION);
  44 MODULE_AUTHOR(DRV_COPYRIGHT);
  45 MODULE_LICENSE("GPL");
  46
  47 #ifdef CONFIG_IWLWIFI_DEBUG
  48 u32 iwl_debug_level;
  49 EXPORT_SYMBOL(iwl_debug_level);
  50 #endif
  51
  52 /* This function both allocates and initializes hw and priv. */
  53 struct ieee80211_hw *iwl_alloc_all(struct iwl_cfg *cfg,
  54                 struct ieee80211_ops *hw_ops)
  55 {
  56         struct iwl_priv *priv;
  57
  58         /* mac80211 allocates memory for this device instance, including
  59          *   space for this driver's private structure */
  60         struct ieee80211_hw *hw =
  61                 ieee80211_alloc_hw(sizeof(struct iwl_priv), hw_ops);
  62         if (hw == NULL) {
  63                 IWL_ERROR("Can not allocate network device\n");
  64                 goto out;
  65         }
  66
  67         priv = hw->priv;
  68         priv->hw = hw;
  69
  70 out:
  71         return hw;
  72 }
  73 EXPORT_SYMBOL(iwl_alloc_all);
  74
  75 /**
  76  * iwlcore_clear_stations_table - Clear the driver's station table
  77  *
  78  * NOTE:  This does not clear or otherwise alter the device's station table.
  79  */
  80 void iwlcore_clear_stations_table(struct iwl_priv *priv)
  81 {
  82         unsigned long flags;
  83
  84         spin_lock_irqsave(&priv->sta_lock, flags);
  85
  86         priv->num_stations = 0;
  87         memset(priv->stations, 0, sizeof(priv->stations));
  88
  89         spin_unlock_irqrestore(&priv->sta_lock, flags);
  90 }
  91 EXPORT_SYMBOL(iwlcore_clear_stations_table);
  92
  93 void iwlcore_reset_qos(struct iwl_priv *priv)
  94 {
  95         u16 cw_min = 15;
  96         u16 cw_max = 1023;
  97         u8 aifs = 2;
  98         u8 is_legacy = 0;
  99         unsigned long flags;
 100         int i;
 101
 102         spin_lock_irqsave(&priv->lock, flags);
 103         priv->qos_data.qos_active = 0;
 104
 105         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS) {
 106                 if (priv->qos_data.qos_enable)
 107                         priv->qos_data.qos_active = 1;
 108                 if (!(priv->active_rate & 0xfff0)) {
 109                         cw_min = 31;
 110                         is_legacy = 1;
 111                 }
 112         } else if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
 113                 if (priv->qos_data.qos_enable)
 114                         priv->qos_data.qos_active = 1;
 115         } else if (!(priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK)) {
 116                 cw_min = 31;
 117                 is_legacy = 1;
 118         }
 119
 120         if (priv->qos_data.qos_active)
 121                 aifs = 3;
 122
 123         priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
 124         priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
 125         priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
 126         priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
 127         priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;
 128
 129         if (priv->qos_data.qos_active) {
 130                 i = 1;
 131                 priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
 132                 priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
 133                 priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
 134                 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
 135                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 136
 137                 i = 2;
 138                 priv->qos_data.def_qos_parm.ac[i].cw_min =
 139                         cpu_to_le16((cw_min + 1) / 2 - 1);
 140                 priv->qos_data.def_qos_parm.ac[i].cw_max =
 141                         cpu_to_le16(cw_max);
 142                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
 143                 if (is_legacy)
 144                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 145                                 cpu_to_le16(6016);
 146                 else
 147                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 148                                 cpu_to_le16(3008);
 149                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 150
 151                 i = 3;
 152                 priv->qos_data.def_qos_parm.ac[i].cw_min =
 153                         cpu_to_le16((cw_min + 1) / 4 - 1);
 154                 priv->qos_data.def_qos_parm.ac[i].cw_max =
 155                         cpu_to_le16((cw_max + 1) / 2 - 1);
 156                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
 157                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 158                 if (is_legacy)
 159                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 160                                 cpu_to_le16(3264);
 161                 else
 162                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 163                                 cpu_to_le16(1504);
 164         } else {
 165                 for (i = 1; i < 4; i++) {
 166                         priv->qos_data.def_qos_parm.ac[i].cw_min =
 167                                 cpu_to_le16(cw_min);
 168                         priv->qos_data.def_qos_parm.ac[i].cw_max =
 169                                 cpu_to_le16(cw_max);
 170                         priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
 171                         priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
 172                         priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 173                 }
 174         }
 175         IWL_DEBUG_QOS("set QoS to default \n");
 176
 177         spin_unlock_irqrestore(&priv->lock, flags);
 178 }
 179 EXPORT_SYMBOL(iwlcore_reset_qos);
 180
 181 /**
 182  * iwlcore_set_rxon_channel - Set the phymode and channel values in staging RXON
 183  * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
 184  * @channel: Any channel valid for the requested phymode
 185
 186  * In addition to setting the staging RXON, priv->phymode is also set.
 187  *
 188  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 189  * in the staging RXON flag structure based on the phymode
 190  */
 191 int iwlcore_set_rxon_channel(struct iwl_priv *priv,
 192                                 enum ieee80211_band band,
 193                                 u16 channel)
 194 {
 195         if (!iwl_get_channel_info(priv, band, channel)) {
 196                 IWL_DEBUG_INFO("Could not set channel to %d [%d]\n",
 197                                channel, band);
 198                 return -EINVAL;
 199         }
 200
 201         if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
 202             (priv->band == band))
 203                 return 0;
 204
 205         priv->staging_rxon.channel = cpu_to_le16(channel);
 206         if (band == IEEE80211_BAND_5GHZ)
 207                 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
 208         else
 209                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 210
 211         priv->band = band;
 212
 213         IWL_DEBUG_INFO("Staging channel set to %d [%d]\n", channel, band);
 214
 215         return 0;
 216 }
 217 EXPORT_SYMBOL(iwlcore_set_rxon_channel);
 218
 219 static void iwlcore_init_hw(struct iwl_priv *priv)
 220 {
 221         struct ieee80211_hw *hw = priv->hw;
 222         hw->rate_control_algorithm = "iwl-4965-rs";
 223
 224         /* Tell mac80211 and its clients (e.g. Wireless Extensions)
 225          *       the range of signal quality values that we'll provide.
 226          * Negative values for level/noise indicate that we'll provide dBm.
 227          * For WE, at least, non-0 values here *enable* display of values
 228          *       in app (iwconfig). */
 229         hw->max_rssi = -20; /* signal level, negative indicates dBm */
 230         hw->max_noise = -20;    /* noise level, negative indicates dBm */
 231         hw->max_signal = 100;   /* link quality indication (%) */
 232
 233         /* Tell mac80211 our Tx characteristics */
 234         hw->flags = IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE;
 235
 236         /* Default value; 4 EDCA QOS priorities */
 237         hw->queues = 4;
 238 #ifdef CONFIG_IWL4965_HT
 239         /* Enhanced value; more queues, to support 11n aggregation */
 240         hw->queues = 16;
 241 #endif /* CONFIG_IWL4965_HT */
 242 }
 243
 244 int iwl_setup(struct iwl_priv *priv)
 245 {
 246         int ret = 0;
 247         iwlcore_init_hw(priv);
 248         ret = priv->cfg->ops->lib->init_drv(priv);
 249         return ret;
 250 }
 251 EXPORT_SYMBOL(iwl_setup);
 252
 253 /* Low level driver call this function to update iwlcore with
 254  * driver status.
 255  */
 256 int iwlcore_low_level_notify(struct iwl_priv *priv,
 257                               enum iwlcore_card_notify notify)
 258 {
 259         int ret;
 260         switch (notify) {
 261         case IWLCORE_INIT_EVT:
 262                 ret = iwl_rfkill_init(priv);
 263                 if (ret)
 264                         IWL_ERROR("Unable to initialize RFKILL system. "
 265                                   "Ignoring error: %d\n", ret);
 266                 break;
 267         case IWLCORE_START_EVT:
 268                 break;
 269         case IWLCORE_STOP_EVT:
 270                 break;
 271         case IWLCORE_REMOVE_EVT:
 272                 iwl_rfkill_unregister(priv);
 273                 break;
 274         }
 275
 276         return 0;
 277 }
 278 EXPORT_SYMBOL(iwlcore_low_level_notify);
 279