git.oblomov.eu Git - 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-dev.h" /* FIXME: remove */
  38 #include "iwl-core.h"
  39 #include "iwl-io.h"
  40 #include "iwl-rfkill.h"
  41 #include "iwl-power.h"
  42
  43
  44 MODULE_DESCRIPTION("iwl core");
  45 MODULE_VERSION(IWLWIFI_VERSION);
  46 MODULE_AUTHOR(DRV_COPYRIGHT);
  47 MODULE_LICENSE("GPL");
  48
  49 #define IWL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np)    \
  50         [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP,      \
  51                                     IWL_RATE_SISO_##s##M_PLCP, \
  52                                     IWL_RATE_MIMO2_##s##M_PLCP,\
  53                                     IWL_RATE_MIMO3_##s##M_PLCP,\
  54                                     IWL_RATE_##r##M_IEEE,      \
  55                                     IWL_RATE_##ip##M_INDEX,    \
  56                                     IWL_RATE_##in##M_INDEX,    \
  57                                     IWL_RATE_##rp##M_INDEX,    \
  58                                     IWL_RATE_##rn##M_INDEX,    \
  59                                     IWL_RATE_##pp##M_INDEX,    \
  60                                     IWL_RATE_##np##M_INDEX }
  61
  62 /*
  63  * Parameter order:
  64  *   rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate
  65  *
  66  * If there isn't a valid next or previous rate then INV is used which
  67  * maps to IWL_RATE_INVALID
  68  *
  69  */
  70 const struct iwl4965_rate_info iwl4965_rates[IWL_RATE_COUNT] = {
  71         IWL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2),    /*  1mbps */
  72         IWL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5),          /*  2mbps */
  73         IWL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11),        /*5.5mbps */
  74         IWL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18),      /* 11mbps */
  75         IWL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11),        /*  6mbps */
  76         IWL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11),       /*  9mbps */
  77         IWL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18),   /* 12mbps */
  78         IWL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24),   /* 18mbps */
  79         IWL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36),   /* 24mbps */
  80         IWL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48),   /* 36mbps */
  81         IWL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54),   /* 48mbps */
  82         IWL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */
  83         IWL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */
  84         /* FIXME:RS:          ^^    should be INV (legacy) */
  85 };
  86 EXPORT_SYMBOL(iwl4965_rates);
  87
  88 /* This function both allocates and initializes hw and priv. */
  89 struct ieee80211_hw *iwl_alloc_all(struct iwl_cfg *cfg,
  90                 struct ieee80211_ops *hw_ops)
  91 {
  92         struct iwl_priv *priv;
  93
  94         /* mac80211 allocates memory for this device instance, including
  95          *   space for this driver's private structure */
  96         struct ieee80211_hw *hw =
  97                 ieee80211_alloc_hw(sizeof(struct iwl_priv), hw_ops);
  98         if (hw == NULL) {
  99                 IWL_ERROR("Can not allocate network device\n");
 100                 goto out;
 101         }
 102
 103         priv = hw->priv;
 104         priv->hw = hw;
 105
 106 out:
 107         return hw;
 108 }
 109 EXPORT_SYMBOL(iwl_alloc_all);
 110
 111 void iwl_hw_detect(struct iwl_priv *priv)
 112 {
 113         priv->hw_rev = _iwl_read32(priv, CSR_HW_REV);
 114         priv->hw_wa_rev = _iwl_read32(priv, CSR_HW_REV_WA_REG);
 115         pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &priv->rev_id);
 116 }
 117 EXPORT_SYMBOL(iwl_hw_detect);
 118
 119 /* Tell nic where to find the "keep warm" buffer */
 120 int iwl_kw_init(struct iwl_priv *priv)
 121 {
 122         unsigned long flags;
 123         int ret;
 124
 125         spin_lock_irqsave(&priv->lock, flags);
 126         ret = iwl_grab_nic_access(priv);
 127         if (ret)
 128                 goto out;
 129
 130         iwl_write_direct32(priv, FH_KW_MEM_ADDR_REG,
 131                              priv->kw.dma_addr >> 4);
 132         iwl_release_nic_access(priv);
 133 out:
 134         spin_unlock_irqrestore(&priv->lock, flags);
 135         return ret;
 136 }
 137
 138 int iwl_kw_alloc(struct iwl_priv *priv)
 139 {
 140         struct pci_dev *dev = priv->pci_dev;
 141         struct iwl_kw *kw = &priv->kw;
 142
 143         kw->size = IWL_KW_SIZE;
 144         kw->v_addr = pci_alloc_consistent(dev, kw->size, &kw->dma_addr);
 145         if (!kw->v_addr)
 146                 return -ENOMEM;
 147
 148         return 0;
 149 }
 150
 151 /**
 152  * iwl_kw_free - Free the "keep warm" buffer
 153  */
 154 void iwl_kw_free(struct iwl_priv *priv)
 155 {
 156         struct pci_dev *dev = priv->pci_dev;
 157         struct iwl_kw *kw = &priv->kw;
 158
 159         if (kw->v_addr) {
 160                 pci_free_consistent(dev, kw->size, kw->v_addr, kw->dma_addr);
 161                 memset(kw, 0, sizeof(*kw));
 162         }
 163 }
 164
 165 int iwl_hw_nic_init(struct iwl_priv *priv)
 166 {
 167         unsigned long flags;
 168         struct iwl_rx_queue *rxq = &priv->rxq;
 169         int ret;
 170
 171         /* nic_init */
 172         spin_lock_irqsave(&priv->lock, flags);
 173         priv->cfg->ops->lib->apm_ops.init(priv);
 174         iwl_write32(priv, CSR_INT_COALESCING, 512 / 32);
 175         spin_unlock_irqrestore(&priv->lock, flags);
 176
 177         ret = priv->cfg->ops->lib->apm_ops.set_pwr_src(priv, IWL_PWR_SRC_VMAIN);
 178
 179         priv->cfg->ops->lib->apm_ops.config(priv);
 180
 181         /* Allocate the RX queue, or reset if it is already allocated */
 182         if (!rxq->bd) {
 183                 ret = iwl_rx_queue_alloc(priv);
 184                 if (ret) {
 185                         IWL_ERROR("Unable to initialize Rx queue\n");
 186                         return -ENOMEM;
 187                 }
 188         } else
 189                 iwl_rx_queue_reset(priv, rxq);
 190
 191         iwl_rx_replenish(priv);
 192
 193         iwl_rx_init(priv, rxq);
 194
 195         spin_lock_irqsave(&priv->lock, flags);
 196
 197         rxq->need_update = 1;
 198         iwl_rx_queue_update_write_ptr(priv, rxq);
 199
 200         spin_unlock_irqrestore(&priv->lock, flags);
 201
 202         /* Allocate and init all Tx and Command queues */
 203         ret = iwl_txq_ctx_reset(priv);
 204         if (ret)
 205                 return ret;
 206
 207         set_bit(STATUS_INIT, &priv->status);
 208
 209         return 0;
 210 }
 211 EXPORT_SYMBOL(iwl_hw_nic_init);
 212
 213 /**
 214  * iwlcore_clear_stations_table - Clear the driver's station table
 215  *
 216  * NOTE:  This does not clear or otherwise alter the device's station table.
 217  */
 218 void iwlcore_clear_stations_table(struct iwl_priv *priv)
 219 {
 220         unsigned long flags;
 221
 222         spin_lock_irqsave(&priv->sta_lock, flags);
 223
 224         priv->num_stations = 0;
 225         memset(priv->stations, 0, sizeof(priv->stations));
 226
 227         spin_unlock_irqrestore(&priv->sta_lock, flags);
 228 }
 229 EXPORT_SYMBOL(iwlcore_clear_stations_table);
 230
 231 void iwl_reset_qos(struct iwl_priv *priv)
 232 {
 233         u16 cw_min = 15;
 234         u16 cw_max = 1023;
 235         u8 aifs = 2;
 236         u8 is_legacy = 0;
 237         unsigned long flags;
 238         int i;
 239
 240         spin_lock_irqsave(&priv->lock, flags);
 241         priv->qos_data.qos_active = 0;
 242
 243         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS) {
 244                 if (priv->qos_data.qos_enable)
 245                         priv->qos_data.qos_active = 1;
 246                 if (!(priv->active_rate & 0xfff0)) {
 247                         cw_min = 31;
 248                         is_legacy = 1;
 249                 }
 250         } else if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
 251                 if (priv->qos_data.qos_enable)
 252                         priv->qos_data.qos_active = 1;
 253         } else if (!(priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK)) {
 254                 cw_min = 31;
 255                 is_legacy = 1;
 256         }
 257
 258         if (priv->qos_data.qos_active)
 259                 aifs = 3;
 260
 261         priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
 262         priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
 263         priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
 264         priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
 265         priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;
 266
 267         if (priv->qos_data.qos_active) {
 268                 i = 1;
 269                 priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
 270                 priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
 271                 priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
 272                 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
 273                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 274
 275                 i = 2;
 276                 priv->qos_data.def_qos_parm.ac[i].cw_min =
 277                         cpu_to_le16((cw_min + 1) / 2 - 1);
 278                 priv->qos_data.def_qos_parm.ac[i].cw_max =
 279                         cpu_to_le16(cw_max);
 280                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
 281                 if (is_legacy)
 282                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 283                                 cpu_to_le16(6016);
 284                 else
 285                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 286                                 cpu_to_le16(3008);
 287                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 288
 289                 i = 3;
 290                 priv->qos_data.def_qos_parm.ac[i].cw_min =
 291                         cpu_to_le16((cw_min + 1) / 4 - 1);
 292                 priv->qos_data.def_qos_parm.ac[i].cw_max =
 293                         cpu_to_le16((cw_max + 1) / 2 - 1);
 294                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
 295                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 296                 if (is_legacy)
 297                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 298                                 cpu_to_le16(3264);
 299                 else
 300                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 301                                 cpu_to_le16(1504);
 302         } else {
 303                 for (i = 1; i < 4; i++) {
 304                         priv->qos_data.def_qos_parm.ac[i].cw_min =
 305                                 cpu_to_le16(cw_min);
 306                         priv->qos_data.def_qos_parm.ac[i].cw_max =
 307                                 cpu_to_le16(cw_max);
 308                         priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
 309                         priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
 310                         priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 311                 }
 312         }
 313         IWL_DEBUG_QOS("set QoS to default \n");
 314
 315         spin_unlock_irqrestore(&priv->lock, flags);
 316 }
 317 EXPORT_SYMBOL(iwl_reset_qos);
 318
 319 #ifdef CONFIG_IWL4965_HT
 320 static void iwlcore_init_ht_hw_capab(const struct iwl_priv *priv,
 321                               struct ieee80211_ht_info *ht_info,
 322                               enum ieee80211_band band)
 323 {
 324         ht_info->cap = 0;
 325         memset(ht_info->supp_mcs_set, 0, 16);
 326
 327         ht_info->ht_supported = 1;
 328
 329         if (priv->hw_params.fat_channel & BIT(band)) {
 330                 ht_info->cap |= (u16)IEEE80211_HT_CAP_SUP_WIDTH;
 331                 ht_info->cap |= (u16)IEEE80211_HT_CAP_SGI_40;
 332                 ht_info->supp_mcs_set[4] = 0x01;
 333         }
 334         ht_info->cap |= (u16)IEEE80211_HT_CAP_GRN_FLD;
 335         ht_info->cap |= (u16)IEEE80211_HT_CAP_SGI_20;
 336         ht_info->cap |= (u16)(IEEE80211_HT_CAP_MIMO_PS &
 337                              (IWL_MIMO_PS_NONE << 2));
 338
 339         if (priv->cfg->mod_params->amsdu_size_8K)
 340                 ht_info->cap |= (u16)IEEE80211_HT_CAP_MAX_AMSDU;
 341
 342         ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
 343         ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
 344
 345         ht_info->supp_mcs_set[0] = 0xFF;
 346         if (priv->hw_params.tx_chains_num >= 2)
 347                 ht_info->supp_mcs_set[1] = 0xFF;
 348         if (priv->hw_params.tx_chains_num >= 3)
 349                 ht_info->supp_mcs_set[2] = 0xFF;
 350 }
 351 #else
 352 static inline void iwlcore_init_ht_hw_capab(const struct iwl_priv *priv,
 353                               struct ieee80211_ht_info *ht_info,
 354                               enum ieee80211_band band)
 355 {
 356 }
 357 #endif /* CONFIG_IWL4965_HT */
 358
 359 static void iwlcore_init_hw_rates(struct iwl_priv *priv,
 360                               struct ieee80211_rate *rates)
 361 {
 362         int i;
 363
 364         for (i = 0; i < IWL_RATE_COUNT; i++) {
 365                 rates[i].bitrate = iwl4965_rates[i].ieee * 5;
 366                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
 367                 rates[i].hw_value_short = i;
 368                 rates[i].flags = 0;
 369                 if ((i > IWL_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
 370                         /*
 371                          * If CCK != 1M then set short preamble rate flag.
 372                          */
 373                         rates[i].flags |=
 374                                 (iwl4965_rates[i].plcp == IWL_RATE_1M_PLCP) ?
 375                                         0 : IEEE80211_RATE_SHORT_PREAMBLE;
 376                 }
 377         }
 378 }
 379
 380 /**
 381  * iwlcore_init_geos - Initialize mac80211's geo/channel info based from eeprom
 382  */
 383 static int iwlcore_init_geos(struct iwl_priv *priv)
 384 {
 385         struct iwl_channel_info *ch;
 386         struct ieee80211_supported_band *sband;
 387         struct ieee80211_channel *channels;
 388         struct ieee80211_channel *geo_ch;
 389         struct ieee80211_rate *rates;
 390         int i = 0;
 391
 392         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
 393             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
 394                 IWL_DEBUG_INFO("Geography modes already initialized.\n");
 395                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
 396                 return 0;
 397         }
 398
 399         channels = kzalloc(sizeof(struct ieee80211_channel) *
 400                            priv->channel_count, GFP_KERNEL);
 401         if (!channels)
 402                 return -ENOMEM;
 403
 404         rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_RATE_COUNT + 1)),
 405                         GFP_KERNEL);
 406         if (!rates) {
 407                 kfree(channels);
 408                 return -ENOMEM;
 409         }
 410
 411         /* 5.2GHz channels start after the 2.4GHz channels */
 412         sband = &priv->bands[IEEE80211_BAND_5GHZ];
 413         sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
 414         /* just OFDM */
 415         sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
 416         sband->n_bitrates = IWL_RATE_COUNT - IWL_FIRST_OFDM_RATE;
 417
 418         iwlcore_init_ht_hw_capab(priv, &sband->ht_info, IEEE80211_BAND_5GHZ);
 419
 420         sband = &priv->bands[IEEE80211_BAND_2GHZ];
 421         sband->channels = channels;
 422         /* OFDM & CCK */
 423         sband->bitrates = rates;
 424         sband->n_bitrates = IWL_RATE_COUNT;
 425
 426         iwlcore_init_ht_hw_capab(priv, &sband->ht_info, IEEE80211_BAND_2GHZ);
 427
 428         priv->ieee_channels = channels;
 429         priv->ieee_rates = rates;
 430
 431         iwlcore_init_hw_rates(priv, rates);
 432
 433         for (i = 0;  i < priv->channel_count; i++) {
 434                 ch = &priv->channel_info[i];
 435
 436                 /* FIXME: might be removed if scan is OK */
 437                 if (!is_channel_valid(ch))
 438                         continue;
 439
 440                 if (is_channel_a_band(ch))
 441                         sband =  &priv->bands[IEEE80211_BAND_5GHZ];
 442                 else
 443                         sband =  &priv->bands[IEEE80211_BAND_2GHZ];
 444
 445                 geo_ch = &sband->channels[sband->n_channels++];
 446
 447                 geo_ch->center_freq =
 448                                 ieee80211_channel_to_frequency(ch->channel);
 449                 geo_ch->max_power = ch->max_power_avg;
 450                 geo_ch->max_antenna_gain = 0xff;
 451                 geo_ch->hw_value = ch->channel;
 452
 453                 if (is_channel_valid(ch)) {
 454                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
 455                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
 456
 457                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
 458                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
 459
 460                         if (ch->flags & EEPROM_CHANNEL_RADAR)
 461                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
 462
 463                         if (ch->max_power_avg > priv->max_channel_txpower_limit)
 464                                 priv->max_channel_txpower_limit =
 465                                     ch->max_power_avg;
 466                 } else {
 467                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
 468                 }
 469
 470                 /* Save flags for reg domain usage */
 471                 geo_ch->orig_flags = geo_ch->flags;
 472
 473                 IWL_DEBUG_INFO("Channel %d Freq=%d[%sGHz] %s flag=0%X\n",
 474                                 ch->channel, geo_ch->center_freq,
 475                                 is_channel_a_band(ch) ?  "5.2" : "2.4",
 476                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
 477                                 "restricted" : "valid",
 478                                  geo_ch->flags);
 479         }
 480
 481         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
 482              priv->cfg->sku & IWL_SKU_A) {
 483                 printk(KERN_INFO DRV_NAME
 484                        ": Incorrectly detected BG card as ABG.  Please send "
 485                        "your PCI ID 0x%04X:0x%04X to maintainer.\n",
 486                        priv->pci_dev->device, priv->pci_dev->subsystem_device);
 487                 priv->cfg->sku &= ~IWL_SKU_A;
 488         }
 489
 490         printk(KERN_INFO DRV_NAME
 491                ": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
 492                priv->bands[IEEE80211_BAND_2GHZ].n_channels,
 493                priv->bands[IEEE80211_BAND_5GHZ].n_channels);
 494
 495         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
 496                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 497                         &priv->bands[IEEE80211_BAND_2GHZ];
 498         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
 499                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 500                         &priv->bands[IEEE80211_BAND_5GHZ];
 501
 502         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
 503
 504         return 0;
 505 }
 506
 507 /*
 508  * iwlcore_free_geos - undo allocations in iwlcore_init_geos
 509  */
 510 void iwlcore_free_geos(struct iwl_priv *priv)
 511 {
 512         kfree(priv->ieee_channels);
 513         kfree(priv->ieee_rates);
 514         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
 515 }
 516 EXPORT_SYMBOL(iwlcore_free_geos);
 517
 518 #ifdef CONFIG_IWL4965_HT
 519 static u8 is_single_rx_stream(struct iwl_priv *priv)
 520 {
 521         return !priv->current_ht_config.is_ht ||
 522                ((priv->current_ht_config.supp_mcs_set[1] == 0) &&
 523                 (priv->current_ht_config.supp_mcs_set[2] == 0)) ||
 524                priv->ps_mode == IWL_MIMO_PS_STATIC;
 525 }
 526 static u8 iwl_is_channel_extension(struct iwl_priv *priv,
 527                                    enum ieee80211_band band,
 528                                    u16 channel, u8 extension_chan_offset)
 529 {
 530         const struct iwl_channel_info *ch_info;
 531
 532         ch_info = iwl_get_channel_info(priv, band, channel);
 533         if (!is_channel_valid(ch_info))
 534                 return 0;
 535
 536         if (extension_chan_offset == IWL_EXT_CHANNEL_OFFSET_NONE)
 537                 return 0;
 538
 539         if ((ch_info->fat_extension_channel == extension_chan_offset) ||
 540             (ch_info->fat_extension_channel == HT_IE_EXT_CHANNEL_MAX))
 541                 return 1;
 542
 543         return 0;
 544 }
 545
 546 u8 iwl_is_fat_tx_allowed(struct iwl_priv *priv,
 547                              struct ieee80211_ht_info *sta_ht_inf)
 548 {
 549         struct iwl_ht_info *iwl_ht_conf = &priv->current_ht_config;
 550
 551         if ((!iwl_ht_conf->is_ht) ||
 552            (iwl_ht_conf->supported_chan_width != IWL_CHANNEL_WIDTH_40MHZ) ||
 553            (iwl_ht_conf->extension_chan_offset == IWL_EXT_CHANNEL_OFFSET_NONE))
 554                 return 0;
 555
 556         if (sta_ht_inf) {
 557                 if ((!sta_ht_inf->ht_supported) ||
 558                    (!(sta_ht_inf->cap & IEEE80211_HT_CAP_SUP_WIDTH)))
 559                         return 0;
 560         }
 561
 562         return iwl_is_channel_extension(priv, priv->band,
 563                                          iwl_ht_conf->control_channel,
 564                                          iwl_ht_conf->extension_chan_offset);
 565 }
 566 EXPORT_SYMBOL(iwl_is_fat_tx_allowed);
 567
 568 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_info *ht_info)
 569 {
 570         struct iwl4965_rxon_cmd *rxon = &priv->staging_rxon;
 571         u32 val;
 572
 573         if (!ht_info->is_ht)
 574                 return;
 575
 576         /* Set up channel bandwidth:  20 MHz only, or 20/40 mixed if fat ok */
 577         if (iwl_is_fat_tx_allowed(priv, NULL))
 578                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED_MSK;
 579         else
 580                 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
 581                                  RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
 582
 583         if (le16_to_cpu(rxon->channel) != ht_info->control_channel) {
 584                 IWL_DEBUG_ASSOC("control diff than current %d %d\n",
 585                                 le16_to_cpu(rxon->channel),
 586                                 ht_info->control_channel);
 587                 rxon->channel = cpu_to_le16(ht_info->control_channel);
 588                 return;
 589         }
 590
 591         /* Note: control channel is opposite of extension channel */
 592         switch (ht_info->extension_chan_offset) {
 593         case IWL_EXT_CHANNEL_OFFSET_ABOVE:
 594                 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 595                 break;
 596         case IWL_EXT_CHANNEL_OFFSET_BELOW:
 597                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 598                 break;
 599         case IWL_EXT_CHANNEL_OFFSET_NONE:
 600         default:
 601                 rxon->flags &= ~RXON_FLG_CHANNEL_MODE_MIXED_MSK;
 602                 break;
 603         }
 604
 605         val = ht_info->ht_protection;
 606
 607         rxon->flags |= cpu_to_le32(val << RXON_FLG_HT_OPERATING_MODE_POS);
 608
 609         iwl_set_rxon_chain(priv);
 610
 611         IWL_DEBUG_ASSOC("supported HT rate 0x%X 0x%X 0x%X "
 612                         "rxon flags 0x%X operation mode :0x%X "
 613                         "extension channel offset 0x%x "
 614                         "control chan %d\n",
 615                         ht_info->supp_mcs_set[0],
 616                         ht_info->supp_mcs_set[1],
 617                         ht_info->supp_mcs_set[2],
 618                         le32_to_cpu(rxon->flags), ht_info->ht_protection,
 619                         ht_info->extension_chan_offset,
 620                         ht_info->control_channel);
 621         return;
 622 }
 623 EXPORT_SYMBOL(iwl_set_rxon_ht);
 624
 625 #else
 626 static inline u8 is_single_rx_stream(struct iwl_priv *priv)
 627 {
 628         return 1;
 629 }
 630 #endif  /*CONFIG_IWL4965_HT */
 631
 632 /*
 633  * Determine how many receiver/antenna chains to use.
 634  * More provides better reception via diversity.  Fewer saves power.
 635  * MIMO (dual stream) requires at least 2, but works better with 3.
 636  * This does not determine *which* chains to use, just how many.
 637  */
 638 static int iwlcore_get_rx_chain_counter(struct iwl_priv *priv,
 639                                         u8 *idle_state, u8 *rx_state)
 640 {
 641         u8 is_single = is_single_rx_stream(priv);
 642         u8 is_cam = test_bit(STATUS_POWER_PMI, &priv->status) ? 0 : 1;
 643
 644         /* # of Rx chains to use when expecting MIMO. */
 645         if (is_single || (!is_cam && (priv->ps_mode == IWL_MIMO_PS_STATIC)))
 646                 *rx_state = 2;
 647         else
 648                 *rx_state = 3;
 649
 650         /* # Rx chains when idling and maybe trying to save power */
 651         switch (priv->ps_mode) {
 652         case IWL_MIMO_PS_STATIC:
 653         case IWL_MIMO_PS_DYNAMIC:
 654                 *idle_state = (is_cam) ? 2 : 1;
 655                 break;
 656         case IWL_MIMO_PS_NONE:
 657                 *idle_state = (is_cam) ? *rx_state : 1;
 658                 break;
 659         default:
 660                 *idle_state = 1;
 661                 break;
 662         }
 663
 664         return 0;
 665 }
 666
 667 /**
 668  * iwl_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
 669  *
 670  * Selects how many and which Rx receivers/antennas/chains to use.
 671  * This should not be used for scan command ... it puts data in wrong place.
 672  */
 673 void iwl_set_rxon_chain(struct iwl_priv *priv)
 674 {
 675         u8 is_single = is_single_rx_stream(priv);
 676         u8 idle_state, rx_state;
 677
 678         priv->staging_rxon.rx_chain = 0;
 679         rx_state = idle_state = 3;
 680
 681         /* Tell uCode which antennas are actually connected.
 682          * Before first association, we assume all antennas are connected.
 683          * Just after first association, iwl_chain_noise_calibration()
 684          *    checks which antennas actually *are* connected. */
 685         priv->staging_rxon.rx_chain |=
 686                     cpu_to_le16(priv->hw_params.valid_rx_ant <<
 687                                                  RXON_RX_CHAIN_VALID_POS);
 688
 689         /* How many receivers should we use? */
 690         iwlcore_get_rx_chain_counter(priv, &idle_state, &rx_state);
 691         priv->staging_rxon.rx_chain |=
 692                 cpu_to_le16(rx_state << RXON_RX_CHAIN_MIMO_CNT_POS);
 693         priv->staging_rxon.rx_chain |=
 694                 cpu_to_le16(idle_state << RXON_RX_CHAIN_CNT_POS);
 695
 696         if (!is_single && (rx_state >= 2) &&
 697             !test_bit(STATUS_POWER_PMI, &priv->status))
 698                 priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
 699         else
 700                 priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
 701
 702         IWL_DEBUG_ASSOC("rx chain %X\n", priv->staging_rxon.rx_chain);
 703 }
 704 EXPORT_SYMBOL(iwl_set_rxon_chain);
 705
 706 /**
 707  * iwlcore_set_rxon_channel - Set the phymode and channel values in staging RXON
 708  * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
 709  * @channel: Any channel valid for the requested phymode
 710
 711  * In addition to setting the staging RXON, priv->phymode is also set.
 712  *
 713  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 714  * in the staging RXON flag structure based on the phymode
 715  */
 716 int iwl_set_rxon_channel(struct iwl_priv *priv,
 717                                 enum ieee80211_band band,
 718                                 u16 channel)
 719 {
 720         if (!iwl_get_channel_info(priv, band, channel)) {
 721                 IWL_DEBUG_INFO("Could not set channel to %d [%d]\n",
 722                                channel, band);
 723                 return -EINVAL;
 724         }
 725
 726         if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
 727             (priv->band == band))
 728                 return 0;
 729
 730         priv->staging_rxon.channel = cpu_to_le16(channel);
 731         if (band == IEEE80211_BAND_5GHZ)
 732                 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
 733         else
 734                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 735
 736         priv->band = band;
 737
 738         IWL_DEBUG_INFO("Staging channel set to %d [%d]\n", channel, band);
 739
 740         return 0;
 741 }
 742 EXPORT_SYMBOL(iwl_set_rxon_channel);
 743
 744 static void iwlcore_init_hw(struct iwl_priv *priv)
 745 {
 746         struct ieee80211_hw *hw = priv->hw;
 747         hw->rate_control_algorithm = "iwl-4965-rs";
 748
 749         /* Tell mac80211 our characteristics */
 750         hw->flags = IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE |
 751                     IEEE80211_HW_SIGNAL_DBM |
 752                     IEEE80211_HW_NOISE_DBM;
 753         /* Default value; 4 EDCA QOS priorities */
 754         hw->queues = 4;
 755 #ifdef CONFIG_IWL4965_HT
 756         /* Enhanced value; more queues, to support 11n aggregation */
 757         hw->ampdu_queues = 12;
 758 #endif /* CONFIG_IWL4965_HT */
 759 }
 760
 761 static int iwlcore_init_drv(struct iwl_priv *priv)
 762 {
 763         int ret;
 764         int i;
 765
 766         priv->retry_rate = 1;
 767         priv->ibss_beacon = NULL;
 768
 769         spin_lock_init(&priv->lock);
 770         spin_lock_init(&priv->power_data.lock);
 771         spin_lock_init(&priv->sta_lock);
 772         spin_lock_init(&priv->hcmd_lock);
 773         spin_lock_init(&priv->lq_mngr.lock);
 774
 775         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++)
 776                 INIT_LIST_HEAD(&priv->ibss_mac_hash[i]);
 777
 778         INIT_LIST_HEAD(&priv->free_frames);
 779
 780         mutex_init(&priv->mutex);
 781
 782         /* Clear the driver's (not device's) station table */
 783         iwlcore_clear_stations_table(priv);
 784
 785         priv->data_retry_limit = -1;
 786         priv->ieee_channels = NULL;
 787         priv->ieee_rates = NULL;
 788         priv->band = IEEE80211_BAND_2GHZ;
 789
 790         priv->iw_mode = IEEE80211_IF_TYPE_STA;
 791
 792         priv->use_ant_b_for_management_frame = 1; /* start with ant B */
 793         priv->ps_mode = IWL_MIMO_PS_NONE;
 794
 795         /* Choose which receivers/antennas to use */
 796         iwl_set_rxon_chain(priv);
 797
 798         iwl_reset_qos(priv);
 799
 800         priv->qos_data.qos_active = 0;
 801         priv->qos_data.qos_cap.val = 0;
 802
 803         iwl_set_rxon_channel(priv, IEEE80211_BAND_2GHZ, 6);
 804
 805         priv->rates_mask = IWL_RATES_MASK;
 806         /* If power management is turned on, default to AC mode */
 807         priv->power_mode = IWL_POWER_AC;
 808         priv->user_txpower_limit = IWL_DEFAULT_TX_POWER;
 809
 810         ret = iwl_init_channel_map(priv);
 811         if (ret) {
 812                 IWL_ERROR("initializing regulatory failed: %d\n", ret);
 813                 goto err;
 814         }
 815
 816         ret = iwlcore_init_geos(priv);
 817         if (ret) {
 818                 IWL_ERROR("initializing geos failed: %d\n", ret);
 819                 goto err_free_channel_map;
 820         }
 821
 822         ret = ieee80211_register_hw(priv->hw);
 823         if (ret) {
 824                 IWL_ERROR("Failed to register network device (error %d)\n",
 825                                 ret);
 826                 goto err_free_geos;
 827         }
 828
 829         priv->hw->conf.beacon_int = 100;
 830         priv->mac80211_registered = 1;
 831
 832         return 0;
 833
 834 err_free_geos:
 835         iwlcore_free_geos(priv);
 836 err_free_channel_map:
 837         iwl_free_channel_map(priv);
 838 err:
 839         return ret;
 840 }
 841
 842 int iwl_setup(struct iwl_priv *priv)
 843 {
 844         int ret = 0;
 845         iwlcore_init_hw(priv);
 846         ret = iwlcore_init_drv(priv);
 847         return ret;
 848 }
 849 EXPORT_SYMBOL(iwl_setup);
 850
 851 /* Low level driver call this function to update iwlcore with
 852  * driver status.
 853  */
 854 int iwlcore_low_level_notify(struct iwl_priv *priv,
 855                               enum iwlcore_card_notify notify)
 856 {
 857         int ret;
 858         switch (notify) {
 859         case IWLCORE_INIT_EVT:
 860                 ret = iwl_rfkill_init(priv);
 861                 if (ret)
 862                         IWL_ERROR("Unable to initialize RFKILL system. "
 863                                   "Ignoring error: %d\n", ret);
 864                 iwl_power_initialize(priv);
 865                 break;
 866         case IWLCORE_START_EVT:
 867                 iwl_power_update_mode(priv, 1);
 868                 break;
 869         case IWLCORE_STOP_EVT:
 870                 break;
 871         case IWLCORE_REMOVE_EVT:
 872                 iwl_rfkill_unregister(priv);
 873                 break;
 874         }
 875
 876         return 0;
 877 }
 878 EXPORT_SYMBOL(iwlcore_low_level_notify);
 879
 880 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags)
 881 {
 882         u32 stat_flags = 0;
 883         struct iwl_host_cmd cmd = {
 884                 .id = REPLY_STATISTICS_CMD,
 885                 .meta.flags = flags,
 886                 .len = sizeof(stat_flags),
 887                 .data = (u8 *) &stat_flags,
 888         };
 889         return iwl_send_cmd(priv, &cmd);
 890 }
 891 EXPORT_SYMBOL(iwl_send_statistics_request);
 892
 893 /**
 894  * iwl_verify_inst_sparse - verify runtime uCode image in card vs. host,
 895  *   using sample data 100 bytes apart.  If these sample points are good,
 896  *   it's a pretty good bet that everything between them is good, too.
 897  */
 898 static int iwlcore_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
 899 {
 900         u32 val;
 901         int ret = 0;
 902         u32 errcnt = 0;
 903         u32 i;
 904
 905         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
 906
 907         ret = iwl_grab_nic_access(priv);
 908         if (ret)
 909                 return ret;
 910
 911         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
 912                 /* read data comes through single port, auto-incr addr */
 913                 /* NOTE: Use the debugless read so we don't flood kernel log
 914                  * if IWL_DL_IO is set */
 915                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
 916                         i + RTC_INST_LOWER_BOUND);
 917                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
 918                 if (val != le32_to_cpu(*image)) {
 919                         ret = -EIO;
 920                         errcnt++;
 921                         if (errcnt >= 3)
 922                                 break;
 923                 }
 924         }
 925
 926         iwl_release_nic_access(priv);
 927
 928         return ret;
 929 }
 930
 931 /**
 932  * iwlcore_verify_inst_full - verify runtime uCode image in card vs. host,
 933  *     looking at all data.
 934  */
 935 static int iwl_verify_inst_full(struct iwl_priv *priv, __le32 *image,
 936                                  u32 len)
 937 {
 938         u32 val;
 939         u32 save_len = len;
 940         int ret = 0;
 941         u32 errcnt;
 942
 943         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
 944
 945         ret = iwl_grab_nic_access(priv);
 946         if (ret)
 947                 return ret;
 948
 949         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);
 950
 951         errcnt = 0;
 952         for (; len > 0; len -= sizeof(u32), image++) {
 953                 /* read data comes through single port, auto-incr addr */
 954                 /* NOTE: Use the debugless read so we don't flood kernel log
 955                  * if IWL_DL_IO is set */
 956                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
 957                 if (val != le32_to_cpu(*image)) {
 958                         IWL_ERROR("uCode INST section is invalid at "
 959                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
 960                                   save_len - len, val, le32_to_cpu(*image));
 961                         ret = -EIO;
 962                         errcnt++;
 963                         if (errcnt >= 20)
 964                                 break;
 965                 }
 966         }
 967
 968         iwl_release_nic_access(priv);
 969
 970         if (!errcnt)
 971                 IWL_DEBUG_INFO
 972                     ("ucode image in INSTRUCTION memory is good\n");
 973
 974         return ret;
 975 }
 976
 977 /**
 978  * iwl_verify_ucode - determine which instruction image is in SRAM,
 979  *    and verify its contents
 980  */
 981 int iwl_verify_ucode(struct iwl_priv *priv)
 982 {
 983         __le32 *image;
 984         u32 len;
 985         int ret;
 986
 987         /* Try bootstrap */
 988         image = (__le32 *)priv->ucode_boot.v_addr;
 989         len = priv->ucode_boot.len;
 990         ret = iwlcore_verify_inst_sparse(priv, image, len);
 991         if (!ret) {
 992                 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
 993                 return 0;
 994         }
 995
 996         /* Try initialize */
 997         image = (__le32 *)priv->ucode_init.v_addr;
 998         len = priv->ucode_init.len;
 999         ret = iwlcore_verify_inst_sparse(priv, image, len);
1000         if (!ret) {
1001                 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
1002                 return 0;
1003         }
1004
1005         /* Try runtime/protocol */
1006         image = (__le32 *)priv->ucode_code.v_addr;
1007         len = priv->ucode_code.len;
1008         ret = iwlcore_verify_inst_sparse(priv, image, len);
1009         if (!ret) {
1010                 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
1011                 return 0;
1012         }
1013
1014         IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
1015
1016         /* Since nothing seems to match, show first several data entries in
1017          * instruction SRAM, so maybe visual inspection will give a clue.
1018          * Selection of bootstrap image (vs. other images) is arbitrary. */
1019         image = (__le32 *)priv->ucode_boot.v_addr;
1020         len = priv->ucode_boot.len;
1021         ret = iwl_verify_inst_full(priv, image, len);
1022
1023         return ret;
1024 }
1025 EXPORT_SYMBOL(iwl_verify_ucode);
1026