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 <net/mac80211.h>
  32
  33 #include "iwl-eeprom.h"
  34 #include "iwl-dev.h" /* FIXME: remove */
  35 #include "iwl-debug.h"
  36 #include "iwl-core.h"
  37 #include "iwl-io.h"
  38 #include "iwl-rfkill.h"
  39 #include "iwl-power.h"
  40 #include "iwl-sta.h"
  41
  42
  43 MODULE_DESCRIPTION("iwl core");
  44 MODULE_VERSION(IWLWIFI_VERSION);
  45 MODULE_AUTHOR(DRV_COPYRIGHT);
  46 MODULE_LICENSE("GPL");
  47
  48 #define IWL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np)    \
  49         [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP,      \
  50                                     IWL_RATE_SISO_##s##M_PLCP, \
  51                                     IWL_RATE_MIMO2_##s##M_PLCP,\
  52                                     IWL_RATE_MIMO3_##s##M_PLCP,\
  53                                     IWL_RATE_##r##M_IEEE,      \
  54                                     IWL_RATE_##ip##M_INDEX,    \
  55                                     IWL_RATE_##in##M_INDEX,    \
  56                                     IWL_RATE_##rp##M_INDEX,    \
  57                                     IWL_RATE_##rn##M_INDEX,    \
  58                                     IWL_RATE_##pp##M_INDEX,    \
  59                                     IWL_RATE_##np##M_INDEX }
  60
  61 /*
  62  * Parameter order:
  63  *   rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate
  64  *
  65  * If there isn't a valid next or previous rate then INV is used which
  66  * maps to IWL_RATE_INVALID
  67  *
  68  */
  69 const struct iwl_rate_info iwl_rates[IWL_RATE_COUNT] = {
  70         IWL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2),    /*  1mbps */
  71         IWL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5),          /*  2mbps */
  72         IWL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11),        /*5.5mbps */
  73         IWL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18),      /* 11mbps */
  74         IWL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11),        /*  6mbps */
  75         IWL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11),       /*  9mbps */
  76         IWL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18),   /* 12mbps */
  77         IWL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24),   /* 18mbps */
  78         IWL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36),   /* 24mbps */
  79         IWL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48),   /* 36mbps */
  80         IWL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54),   /* 48mbps */
  81         IWL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */
  82         IWL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */
  83         /* FIXME:RS:          ^^    should be INV (legacy) */
  84 };
  85 EXPORT_SYMBOL(iwl_rates);
  86
  87 /**
  88  * translate ucode response to mac80211 tx status control values
  89  */
  90 void iwl_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
  91                                   struct ieee80211_tx_info *info)
  92 {
  93         int rate_index;
  94         struct ieee80211_tx_rate *r = &info->control.rates[0];
  95
  96         info->antenna_sel_tx =
  97                 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
  98         if (rate_n_flags & RATE_MCS_HT_MSK)
  99                 r->flags |= IEEE80211_TX_RC_MCS;
 100         if (rate_n_flags & RATE_MCS_GF_MSK)
 101                 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
 102         if (rate_n_flags & RATE_MCS_FAT_MSK)
 103                 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
 104         if (rate_n_flags & RATE_MCS_DUP_MSK)
 105                 r->flags |= IEEE80211_TX_RC_DUP_DATA;
 106         if (rate_n_flags & RATE_MCS_SGI_MSK)
 107                 r->flags |= IEEE80211_TX_RC_SHORT_GI;
 108         rate_index = iwl_hwrate_to_plcp_idx(rate_n_flags);
 109         if (info->band == IEEE80211_BAND_5GHZ)
 110                 rate_index -= IWL_FIRST_OFDM_RATE;
 111         r->idx = rate_index;
 112 }
 113 EXPORT_SYMBOL(iwl_hwrate_to_tx_control);
 114
 115 int iwl_hwrate_to_plcp_idx(u32 rate_n_flags)
 116 {
 117         int idx = 0;
 118
 119         /* HT rate format */
 120         if (rate_n_flags & RATE_MCS_HT_MSK) {
 121                 idx = (rate_n_flags & 0xff);
 122
 123                 if (idx >= IWL_RATE_MIMO3_6M_PLCP)
 124                         idx = idx - IWL_RATE_MIMO3_6M_PLCP;
 125                 else if (idx >= IWL_RATE_MIMO2_6M_PLCP)
 126                         idx = idx - IWL_RATE_MIMO2_6M_PLCP;
 127
 128                 idx += IWL_FIRST_OFDM_RATE;
 129                 /* skip 9M not supported in ht*/
 130                 if (idx >= IWL_RATE_9M_INDEX)
 131                         idx += 1;
 132                 if ((idx >= IWL_FIRST_OFDM_RATE) && (idx <= IWL_LAST_OFDM_RATE))
 133                         return idx;
 134
 135         /* legacy rate format, search for match in table */
 136         } else {
 137                 for (idx = 0; idx < ARRAY_SIZE(iwl_rates); idx++)
 138                         if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
 139                                 return idx;
 140         }
 141
 142         return -1;
 143 }
 144 EXPORT_SYMBOL(iwl_hwrate_to_plcp_idx);
 145
 146 u8 iwl_toggle_tx_ant(struct iwl_priv *priv, u8 ant)
 147 {
 148         int i;
 149         u8 ind = ant;
 150         for (i = 0; i < RATE_ANT_NUM - 1; i++) {
 151                 ind = (ind + 1) < RATE_ANT_NUM ?  ind + 1 : 0;
 152                 if (priv->hw_params.valid_tx_ant & BIT(ind))
 153                         return ind;
 154         }
 155         return ant;
 156 }
 157
 158 const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 159 EXPORT_SYMBOL(iwl_bcast_addr);
 160
 161
 162 /* This function both allocates and initializes hw and priv. */
 163 struct ieee80211_hw *iwl_alloc_all(struct iwl_cfg *cfg,
 164                 struct ieee80211_ops *hw_ops)
 165 {
 166         struct iwl_priv *priv;
 167
 168         /* mac80211 allocates memory for this device instance, including
 169          *   space for this driver's private structure */
 170         struct ieee80211_hw *hw =
 171                 ieee80211_alloc_hw(sizeof(struct iwl_priv), hw_ops);
 172         if (hw == NULL) {
 173                 IWL_ERROR("Can not allocate network device\n");
 174                 goto out;
 175         }
 176
 177         priv = hw->priv;
 178         priv->hw = hw;
 179
 180 out:
 181         return hw;
 182 }
 183 EXPORT_SYMBOL(iwl_alloc_all);
 184
 185 void iwl_hw_detect(struct iwl_priv *priv)
 186 {
 187         priv->hw_rev = _iwl_read32(priv, CSR_HW_REV);
 188         priv->hw_wa_rev = _iwl_read32(priv, CSR_HW_REV_WA_REG);
 189         pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &priv->rev_id);
 190 }
 191 EXPORT_SYMBOL(iwl_hw_detect);
 192
 193 int iwl_hw_nic_init(struct iwl_priv *priv)
 194 {
 195         unsigned long flags;
 196         struct iwl_rx_queue *rxq = &priv->rxq;
 197         int ret;
 198
 199         /* nic_init */
 200         spin_lock_irqsave(&priv->lock, flags);
 201         priv->cfg->ops->lib->apm_ops.init(priv);
 202         iwl_write32(priv, CSR_INT_COALESCING, 512 / 32);
 203         spin_unlock_irqrestore(&priv->lock, flags);
 204
 205         ret = priv->cfg->ops->lib->apm_ops.set_pwr_src(priv, IWL_PWR_SRC_VMAIN);
 206
 207         priv->cfg->ops->lib->apm_ops.config(priv);
 208
 209         /* Allocate the RX queue, or reset if it is already allocated */
 210         if (!rxq->bd) {
 211                 ret = iwl_rx_queue_alloc(priv);
 212                 if (ret) {
 213                         IWL_ERROR("Unable to initialize Rx queue\n");
 214                         return -ENOMEM;
 215                 }
 216         } else
 217                 iwl_rx_queue_reset(priv, rxq);
 218
 219         iwl_rx_replenish(priv);
 220
 221         iwl_rx_init(priv, rxq);
 222
 223         spin_lock_irqsave(&priv->lock, flags);
 224
 225         rxq->need_update = 1;
 226         iwl_rx_queue_update_write_ptr(priv, rxq);
 227
 228         spin_unlock_irqrestore(&priv->lock, flags);
 229
 230         /* Allocate and init all Tx and Command queues */
 231         ret = iwl_txq_ctx_reset(priv);
 232         if (ret)
 233                 return ret;
 234
 235         set_bit(STATUS_INIT, &priv->status);
 236
 237         return 0;
 238 }
 239 EXPORT_SYMBOL(iwl_hw_nic_init);
 240
 241
 242 void iwl_reset_qos(struct iwl_priv *priv)
 243 {
 244         u16 cw_min = 15;
 245         u16 cw_max = 1023;
 246         u8 aifs = 2;
 247         u8 is_legacy = 0;
 248         unsigned long flags;
 249         int i;
 250
 251         spin_lock_irqsave(&priv->lock, flags);
 252         priv->qos_data.qos_active = 0;
 253
 254         if (priv->iw_mode == NL80211_IFTYPE_ADHOC) {
 255                 if (priv->qos_data.qos_enable)
 256                         priv->qos_data.qos_active = 1;
 257                 if (!(priv->active_rate & 0xfff0)) {
 258                         cw_min = 31;
 259                         is_legacy = 1;
 260                 }
 261         } else if (priv->iw_mode == NL80211_IFTYPE_AP) {
 262                 if (priv->qos_data.qos_enable)
 263                         priv->qos_data.qos_active = 1;
 264         } else if (!(priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK)) {
 265                 cw_min = 31;
 266                 is_legacy = 1;
 267         }
 268
 269         if (priv->qos_data.qos_active)
 270                 aifs = 3;
 271
 272         priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
 273         priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
 274         priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
 275         priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
 276         priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;
 277
 278         if (priv->qos_data.qos_active) {
 279                 i = 1;
 280                 priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
 281                 priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
 282                 priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
 283                 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
 284                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 285
 286                 i = 2;
 287                 priv->qos_data.def_qos_parm.ac[i].cw_min =
 288                         cpu_to_le16((cw_min + 1) / 2 - 1);
 289                 priv->qos_data.def_qos_parm.ac[i].cw_max =
 290                         cpu_to_le16(cw_max);
 291                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
 292                 if (is_legacy)
 293                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 294                                 cpu_to_le16(6016);
 295                 else
 296                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 297                                 cpu_to_le16(3008);
 298                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 299
 300                 i = 3;
 301                 priv->qos_data.def_qos_parm.ac[i].cw_min =
 302                         cpu_to_le16((cw_min + 1) / 4 - 1);
 303                 priv->qos_data.def_qos_parm.ac[i].cw_max =
 304                         cpu_to_le16((cw_max + 1) / 2 - 1);
 305                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
 306                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 307                 if (is_legacy)
 308                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 309                                 cpu_to_le16(3264);
 310                 else
 311                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 312                                 cpu_to_le16(1504);
 313         } else {
 314                 for (i = 1; i < 4; i++) {
 315                         priv->qos_data.def_qos_parm.ac[i].cw_min =
 316                                 cpu_to_le16(cw_min);
 317                         priv->qos_data.def_qos_parm.ac[i].cw_max =
 318                                 cpu_to_le16(cw_max);
 319                         priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
 320                         priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
 321                         priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 322                 }
 323         }
 324         IWL_DEBUG_QOS("set QoS to default \n");
 325
 326         spin_unlock_irqrestore(&priv->lock, flags);
 327 }
 328 EXPORT_SYMBOL(iwl_reset_qos);
 329
 330 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
 331 #define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
 332 static void iwlcore_init_ht_hw_capab(const struct iwl_priv *priv,
 333                               struct ieee80211_sta_ht_cap *ht_info,
 334                               enum ieee80211_band band)
 335 {
 336         u16 max_bit_rate = 0;
 337         u8 rx_chains_num = priv->hw_params.rx_chains_num;
 338         u8 tx_chains_num = priv->hw_params.tx_chains_num;
 339
 340         ht_info->cap = 0;
 341         memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
 342
 343         ht_info->ht_supported = true;
 344
 345         ht_info->cap |= IEEE80211_HT_CAP_GRN_FLD;
 346         ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
 347         ht_info->cap |= (IEEE80211_HT_CAP_SM_PS &
 348                              (WLAN_HT_CAP_SM_PS_DISABLED << 2));
 349
 350         max_bit_rate = MAX_BIT_RATE_20_MHZ;
 351         if (priv->hw_params.fat_channel & BIT(band)) {
 352                 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 353                 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
 354                 ht_info->mcs.rx_mask[4] = 0x01;
 355                 max_bit_rate = MAX_BIT_RATE_40_MHZ;
 356         }
 357
 358         if (priv->cfg->mod_params->amsdu_size_8K)
 359                 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
 360
 361         ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
 362         ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
 363
 364         ht_info->mcs.rx_mask[0] = 0xFF;
 365         if (rx_chains_num >= 2)
 366                 ht_info->mcs.rx_mask[1] = 0xFF;
 367         if (rx_chains_num >= 3)
 368                 ht_info->mcs.rx_mask[2] = 0xFF;
 369
 370         /* Highest supported Rx data rate */
 371         max_bit_rate *= rx_chains_num;
 372         WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
 373         ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
 374
 375         /* Tx MCS capabilities */
 376         ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
 377         if (tx_chains_num != rx_chains_num) {
 378                 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
 379                 ht_info->mcs.tx_params |= ((tx_chains_num - 1) <<
 380                                 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
 381         }
 382 }
 383
 384 static void iwlcore_init_hw_rates(struct iwl_priv *priv,
 385                               struct ieee80211_rate *rates)
 386 {
 387         int i;
 388
 389         for (i = 0; i < IWL_RATE_COUNT; i++) {
 390                 rates[i].bitrate = iwl_rates[i].ieee * 5;
 391                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
 392                 rates[i].hw_value_short = i;
 393                 rates[i].flags = 0;
 394                 if ((i > IWL_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
 395                         /*
 396                          * If CCK != 1M then set short preamble rate flag.
 397                          */
 398                         rates[i].flags |=
 399                                 (iwl_rates[i].plcp == IWL_RATE_1M_PLCP) ?
 400                                         0 : IEEE80211_RATE_SHORT_PREAMBLE;
 401                 }
 402         }
 403 }
 404
 405 /**
 406  * iwlcore_init_geos - Initialize mac80211's geo/channel info based from eeprom
 407  */
 408 static int iwlcore_init_geos(struct iwl_priv *priv)
 409 {
 410         struct iwl_channel_info *ch;
 411         struct ieee80211_supported_band *sband;
 412         struct ieee80211_channel *channels;
 413         struct ieee80211_channel *geo_ch;
 414         struct ieee80211_rate *rates;
 415         int i = 0;
 416
 417         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
 418             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
 419                 IWL_DEBUG_INFO("Geography modes already initialized.\n");
 420                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
 421                 return 0;
 422         }
 423
 424         channels = kzalloc(sizeof(struct ieee80211_channel) *
 425                            priv->channel_count, GFP_KERNEL);
 426         if (!channels)
 427                 return -ENOMEM;
 428
 429         rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_RATE_COUNT + 1)),
 430                         GFP_KERNEL);
 431         if (!rates) {
 432                 kfree(channels);
 433                 return -ENOMEM;
 434         }
 435
 436         /* 5.2GHz channels start after the 2.4GHz channels */
 437         sband = &priv->bands[IEEE80211_BAND_5GHZ];
 438         sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
 439         /* just OFDM */
 440         sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
 441         sband->n_bitrates = IWL_RATE_COUNT - IWL_FIRST_OFDM_RATE;
 442
 443         if (priv->cfg->sku & IWL_SKU_N)
 444                 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
 445                                          IEEE80211_BAND_5GHZ);
 446
 447         sband = &priv->bands[IEEE80211_BAND_2GHZ];
 448         sband->channels = channels;
 449         /* OFDM & CCK */
 450         sband->bitrates = rates;
 451         sband->n_bitrates = IWL_RATE_COUNT;
 452
 453         if (priv->cfg->sku & IWL_SKU_N)
 454                 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
 455                                          IEEE80211_BAND_2GHZ);
 456
 457         priv->ieee_channels = channels;
 458         priv->ieee_rates = rates;
 459
 460         iwlcore_init_hw_rates(priv, rates);
 461
 462         for (i = 0;  i < priv->channel_count; i++) {
 463                 ch = &priv->channel_info[i];
 464
 465                 /* FIXME: might be removed if scan is OK */
 466                 if (!is_channel_valid(ch))
 467                         continue;
 468
 469                 if (is_channel_a_band(ch))
 470                         sband =  &priv->bands[IEEE80211_BAND_5GHZ];
 471                 else
 472                         sband =  &priv->bands[IEEE80211_BAND_2GHZ];
 473
 474                 geo_ch = &sband->channels[sband->n_channels++];
 475
 476                 geo_ch->center_freq =
 477                                 ieee80211_channel_to_frequency(ch->channel);
 478                 geo_ch->max_power = ch->max_power_avg;
 479                 geo_ch->max_antenna_gain = 0xff;
 480                 geo_ch->hw_value = ch->channel;
 481
 482                 if (is_channel_valid(ch)) {
 483                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
 484                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
 485
 486                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
 487                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
 488
 489                         if (ch->flags & EEPROM_CHANNEL_RADAR)
 490                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
 491
 492                         geo_ch->flags |= ch->fat_extension_channel;
 493
 494                         if (ch->max_power_avg > priv->tx_power_channel_lmt)
 495                                 priv->tx_power_channel_lmt = ch->max_power_avg;
 496                 } else {
 497                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
 498                 }
 499
 500                 /* Save flags for reg domain usage */
 501                 geo_ch->orig_flags = geo_ch->flags;
 502
 503                 IWL_DEBUG_INFO("Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
 504                                 ch->channel, geo_ch->center_freq,
 505                                 is_channel_a_band(ch) ?  "5.2" : "2.4",
 506                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
 507                                 "restricted" : "valid",
 508                                  geo_ch->flags);
 509         }
 510
 511         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
 512              priv->cfg->sku & IWL_SKU_A) {
 513                 printk(KERN_INFO DRV_NAME
 514                        ": Incorrectly detected BG card as ABG.  Please send "
 515                        "your PCI ID 0x%04X:0x%04X to maintainer.\n",
 516                        priv->pci_dev->device, priv->pci_dev->subsystem_device);
 517                 priv->cfg->sku &= ~IWL_SKU_A;
 518         }
 519
 520         printk(KERN_INFO DRV_NAME
 521                ": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
 522                priv->bands[IEEE80211_BAND_2GHZ].n_channels,
 523                priv->bands[IEEE80211_BAND_5GHZ].n_channels);
 524
 525
 526         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
 527
 528         return 0;
 529 }
 530
 531 /*
 532  * iwlcore_free_geos - undo allocations in iwlcore_init_geos
 533  */
 534 static void iwlcore_free_geos(struct iwl_priv *priv)
 535 {
 536         kfree(priv->ieee_channels);
 537         kfree(priv->ieee_rates);
 538         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
 539 }
 540
 541 static bool is_single_rx_stream(struct iwl_priv *priv)
 542 {
 543         return !priv->current_ht_config.is_ht ||
 544                ((priv->current_ht_config.mcs.rx_mask[1] == 0) &&
 545                 (priv->current_ht_config.mcs.rx_mask[2] == 0));
 546 }
 547
 548 static u8 iwl_is_channel_extension(struct iwl_priv *priv,
 549                                    enum ieee80211_band band,
 550                                    u16 channel, u8 extension_chan_offset)
 551 {
 552         const struct iwl_channel_info *ch_info;
 553
 554         ch_info = iwl_get_channel_info(priv, band, channel);
 555         if (!is_channel_valid(ch_info))
 556                 return 0;
 557
 558         if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
 559                 return !(ch_info->fat_extension_channel &
 560                                         IEEE80211_CHAN_NO_FAT_ABOVE);
 561         else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
 562                 return !(ch_info->fat_extension_channel &
 563                                         IEEE80211_CHAN_NO_FAT_BELOW);
 564
 565         return 0;
 566 }
 567
 568 u8 iwl_is_fat_tx_allowed(struct iwl_priv *priv,
 569                          struct ieee80211_sta_ht_cap *sta_ht_inf)
 570 {
 571         struct iwl_ht_info *iwl_ht_conf = &priv->current_ht_config;
 572
 573         if ((!iwl_ht_conf->is_ht) ||
 574            (iwl_ht_conf->supported_chan_width != IWL_CHANNEL_WIDTH_40MHZ) ||
 575            (iwl_ht_conf->extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_NONE))
 576                 return 0;
 577
 578         if (sta_ht_inf) {
 579                 if ((!sta_ht_inf->ht_supported) ||
 580                    (!(sta_ht_inf->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)))
 581                         return 0;
 582         }
 583
 584         return iwl_is_channel_extension(priv, priv->band,
 585                                         le16_to_cpu(priv->staging_rxon.channel),
 586                                         iwl_ht_conf->extension_chan_offset);
 587 }
 588 EXPORT_SYMBOL(iwl_is_fat_tx_allowed);
 589
 590 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_info *ht_info)
 591 {
 592         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 593         u32 val;
 594
 595         if (!ht_info->is_ht) {
 596                 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
 597                         RXON_FLG_CHANNEL_MODE_PURE_40_MSK |
 598                         RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
 599                         RXON_FLG_FAT_PROT_MSK |
 600                         RXON_FLG_HT_PROT_MSK);
 601                 return;
 602         }
 603
 604         /* Set up channel bandwidth:  20 MHz only, or 20/40 mixed if fat ok */
 605         if (iwl_is_fat_tx_allowed(priv, NULL))
 606                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED_MSK;
 607         else
 608                 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
 609                                  RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
 610
 611         /* Note: control channel is opposite of extension channel */
 612         switch (ht_info->extension_chan_offset) {
 613         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 614                 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 615                 break;
 616         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 617                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 618                 break;
 619         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
 620         default:
 621                 rxon->flags &= ~RXON_FLG_CHANNEL_MODE_MIXED_MSK;
 622                 break;
 623         }
 624
 625         val = ht_info->ht_protection;
 626
 627         rxon->flags |= cpu_to_le32(val << RXON_FLG_HT_OPERATING_MODE_POS);
 628
 629         iwl_set_rxon_chain(priv);
 630
 631         IWL_DEBUG_ASSOC("supported HT rate 0x%X 0x%X 0x%X "
 632                         "rxon flags 0x%X operation mode :0x%X "
 633                         "extension channel offset 0x%x\n",
 634                         ht_info->mcs.rx_mask[0],
 635                         ht_info->mcs.rx_mask[1],
 636                         ht_info->mcs.rx_mask[2],
 637                         le32_to_cpu(rxon->flags), ht_info->ht_protection,
 638                         ht_info->extension_chan_offset);
 639         return;
 640 }
 641 EXPORT_SYMBOL(iwl_set_rxon_ht);
 642
 643 #define IWL_NUM_RX_CHAINS_MULTIPLE      3
 644 #define IWL_NUM_RX_CHAINS_SINGLE        2
 645 #define IWL_NUM_IDLE_CHAINS_DUAL        2
 646 #define IWL_NUM_IDLE_CHAINS_SINGLE      1
 647
 648 /* Determine how many receiver/antenna chains to use.
 649  * More provides better reception via diversity.  Fewer saves power.
 650  * MIMO (dual stream) requires at least 2, but works better with 3.
 651  * This does not determine *which* chains to use, just how many.
 652  */
 653 static int iwl_get_active_rx_chain_count(struct iwl_priv *priv)
 654 {
 655         bool is_single = is_single_rx_stream(priv);
 656         bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
 657
 658         /* # of Rx chains to use when expecting MIMO. */
 659         if (is_single || (!is_cam && (priv->current_ht_config.sm_ps ==
 660                                                  WLAN_HT_CAP_SM_PS_STATIC)))
 661                 return IWL_NUM_RX_CHAINS_SINGLE;
 662         else
 663                 return IWL_NUM_RX_CHAINS_MULTIPLE;
 664 }
 665
 666 static int iwl_get_idle_rx_chain_count(struct iwl_priv *priv, int active_cnt)
 667 {
 668         int idle_cnt;
 669         bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
 670         /* # Rx chains when idling and maybe trying to save power */
 671         switch (priv->current_ht_config.sm_ps) {
 672         case WLAN_HT_CAP_SM_PS_STATIC:
 673         case WLAN_HT_CAP_SM_PS_DYNAMIC:
 674                 idle_cnt = (is_cam) ? IWL_NUM_IDLE_CHAINS_DUAL :
 675                                         IWL_NUM_IDLE_CHAINS_SINGLE;
 676                 break;
 677         case WLAN_HT_CAP_SM_PS_DISABLED:
 678                 idle_cnt = (is_cam) ? active_cnt : IWL_NUM_IDLE_CHAINS_SINGLE;
 679                 break;
 680         case WLAN_HT_CAP_SM_PS_INVALID:
 681         default:
 682                 IWL_ERROR("invalid mimo ps mode %d\n",
 683                            priv->current_ht_config.sm_ps);
 684                 WARN_ON(1);
 685                 idle_cnt = -1;
 686                 break;
 687         }
 688         return idle_cnt;
 689 }
 690
 691 /* up to 4 chains */
 692 static u8 iwl_count_chain_bitmap(u32 chain_bitmap)
 693 {
 694         u8 res;
 695         res = (chain_bitmap & BIT(0)) >> 0;
 696         res += (chain_bitmap & BIT(1)) >> 1;
 697         res += (chain_bitmap & BIT(2)) >> 2;
 698         res += (chain_bitmap & BIT(4)) >> 4;
 699         return res;
 700 }
 701
 702 /**
 703  * iwl_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
 704  *
 705  * Selects how many and which Rx receivers/antennas/chains to use.
 706  * This should not be used for scan command ... it puts data in wrong place.
 707  */
 708 void iwl_set_rxon_chain(struct iwl_priv *priv)
 709 {
 710         bool is_single = is_single_rx_stream(priv);
 711         bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
 712         u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt;
 713         u32 active_chains;
 714         u16 rx_chain;
 715
 716         /* Tell uCode which antennas are actually connected.
 717          * Before first association, we assume all antennas are connected.
 718          * Just after first association, iwl_chain_noise_calibration()
 719          *    checks which antennas actually *are* connected. */
 720          if (priv->chain_noise_data.active_chains)
 721                 active_chains = priv->chain_noise_data.active_chains;
 722         else
 723                 active_chains = priv->hw_params.valid_rx_ant;
 724
 725         rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;
 726
 727         /* How many receivers should we use? */
 728         active_rx_cnt = iwl_get_active_rx_chain_count(priv);
 729         idle_rx_cnt = iwl_get_idle_rx_chain_count(priv, active_rx_cnt);
 730
 731
 732         /* correct rx chain count according hw settings
 733          * and chain noise calibration
 734          */
 735         valid_rx_cnt = iwl_count_chain_bitmap(active_chains);
 736         if (valid_rx_cnt < active_rx_cnt)
 737                 active_rx_cnt = valid_rx_cnt;
 738
 739         if (valid_rx_cnt < idle_rx_cnt)
 740                 idle_rx_cnt = valid_rx_cnt;
 741
 742         rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS;
 743         rx_chain |= idle_rx_cnt  << RXON_RX_CHAIN_CNT_POS;
 744
 745         priv->staging_rxon.rx_chain = cpu_to_le16(rx_chain);
 746
 747         if (!is_single && (active_rx_cnt >= IWL_NUM_RX_CHAINS_SINGLE) && is_cam)
 748                 priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
 749         else
 750                 priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
 751
 752         IWL_DEBUG_ASSOC("rx_chain=0x%X active=%d idle=%d\n",
 753                         priv->staging_rxon.rx_chain,
 754                         active_rx_cnt, idle_rx_cnt);
 755
 756         WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
 757                 active_rx_cnt < idle_rx_cnt);
 758 }
 759 EXPORT_SYMBOL(iwl_set_rxon_chain);
 760
 761 /**
 762  * iwl_set_rxon_channel - Set the phymode and channel values in staging RXON
 763  * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
 764  * @channel: Any channel valid for the requested phymode
 765
 766  * In addition to setting the staging RXON, priv->phymode is also set.
 767  *
 768  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 769  * in the staging RXON flag structure based on the phymode
 770  */
 771 int iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch)
 772 {
 773         enum ieee80211_band band = ch->band;
 774         u16 channel = ieee80211_frequency_to_channel(ch->center_freq);
 775
 776         if (!iwl_get_channel_info(priv, band, channel)) {
 777                 IWL_DEBUG_INFO("Could not set channel to %d [%d]\n",
 778                                channel, band);
 779                 return -EINVAL;
 780         }
 781
 782         if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
 783             (priv->band == band))
 784                 return 0;
 785
 786         priv->staging_rxon.channel = cpu_to_le16(channel);
 787         if (band == IEEE80211_BAND_5GHZ)
 788                 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
 789         else
 790                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 791
 792         priv->band = band;
 793
 794         IWL_DEBUG_INFO("Staging channel set to %d [%d]\n", channel, band);
 795
 796         return 0;
 797 }
 798 EXPORT_SYMBOL(iwl_set_rxon_channel);
 799
 800 int iwl_setup_mac(struct iwl_priv *priv)
 801 {
 802         int ret;
 803         struct ieee80211_hw *hw = priv->hw;
 804         hw->rate_control_algorithm = "iwl-agn-rs";
 805
 806         /* Tell mac80211 our characteristics */
 807         hw->flags = IEEE80211_HW_SIGNAL_DBM |
 808                     IEEE80211_HW_NOISE_DBM |
 809                     IEEE80211_HW_AMPDU_AGGREGATION;
 810         hw->wiphy->interface_modes =
 811                 BIT(NL80211_IFTYPE_AP) |
 812                 BIT(NL80211_IFTYPE_STATION) |
 813                 BIT(NL80211_IFTYPE_ADHOC);
 814
 815         hw->wiphy->fw_handles_regulatory = true;
 816
 817         /* Default value; 4 EDCA QOS priorities */
 818         hw->queues = 4;
 819         /* queues to support 11n aggregation */
 820         if (priv->cfg->sku & IWL_SKU_N)
 821                 hw->ampdu_queues = priv->cfg->mod_params->num_of_ampdu_queues;
 822
 823         hw->conf.beacon_int = 100;
 824         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 825
 826         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
 827                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 828                         &priv->bands[IEEE80211_BAND_2GHZ];
 829         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
 830                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 831                         &priv->bands[IEEE80211_BAND_5GHZ];
 832
 833         ret = ieee80211_register_hw(priv->hw);
 834         if (ret) {
 835                 IWL_ERROR("Failed to register hw (error %d)\n", ret);
 836                 return ret;
 837         }
 838         priv->mac80211_registered = 1;
 839
 840         return 0;
 841 }
 842 EXPORT_SYMBOL(iwl_setup_mac);
 843
 844 int iwl_set_hw_params(struct iwl_priv *priv)
 845 {
 846         priv->hw_params.sw_crypto = priv->cfg->mod_params->sw_crypto;
 847         priv->hw_params.max_rxq_size = RX_QUEUE_SIZE;
 848         priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
 849         if (priv->cfg->mod_params->amsdu_size_8K)
 850                 priv->hw_params.rx_buf_size = IWL_RX_BUF_SIZE_8K;
 851         else
 852                 priv->hw_params.rx_buf_size = IWL_RX_BUF_SIZE_4K;
 853         priv->hw_params.max_pkt_size = priv->hw_params.rx_buf_size - 256;
 854
 855         if (priv->cfg->mod_params->disable_11n)
 856                 priv->cfg->sku &= ~IWL_SKU_N;
 857
 858         /* Device-specific setup */
 859         return priv->cfg->ops->lib->set_hw_params(priv);
 860 }
 861 EXPORT_SYMBOL(iwl_set_hw_params);
 862
 863 int iwl_init_drv(struct iwl_priv *priv)
 864 {
 865         int ret;
 866
 867         priv->retry_rate = 1;
 868         priv->ibss_beacon = NULL;
 869
 870         spin_lock_init(&priv->lock);
 871         spin_lock_init(&priv->power_data.lock);
 872         spin_lock_init(&priv->sta_lock);
 873         spin_lock_init(&priv->hcmd_lock);
 874
 875         INIT_LIST_HEAD(&priv->free_frames);
 876
 877         mutex_init(&priv->mutex);
 878
 879         /* Clear the driver's (not device's) station table */
 880         iwl_clear_stations_table(priv);
 881
 882         priv->data_retry_limit = -1;
 883         priv->ieee_channels = NULL;
 884         priv->ieee_rates = NULL;
 885         priv->band = IEEE80211_BAND_2GHZ;
 886
 887         priv->iw_mode = NL80211_IFTYPE_STATION;
 888
 889         priv->current_ht_config.sm_ps = WLAN_HT_CAP_SM_PS_DISABLED;
 890
 891         /* Choose which receivers/antennas to use */
 892         iwl_set_rxon_chain(priv);
 893         iwl_init_scan_params(priv);
 894
 895         if (priv->cfg->mod_params->enable_qos)
 896                 priv->qos_data.qos_enable = 1;
 897
 898         iwl_reset_qos(priv);
 899
 900         priv->qos_data.qos_active = 0;
 901         priv->qos_data.qos_cap.val = 0;
 902
 903         priv->rates_mask = IWL_RATES_MASK;
 904         /* If power management is turned on, default to AC mode */
 905         priv->power_mode = IWL_POWER_AC;
 906         priv->tx_power_user_lmt = IWL_TX_POWER_TARGET_POWER_MAX;
 907
 908         ret = iwl_init_channel_map(priv);
 909         if (ret) {
 910                 IWL_ERROR("initializing regulatory failed: %d\n", ret);
 911                 goto err;
 912         }
 913
 914         ret = iwlcore_init_geos(priv);
 915         if (ret) {
 916                 IWL_ERROR("initializing geos failed: %d\n", ret);
 917                 goto err_free_channel_map;
 918         }
 919
 920         return 0;
 921
 922 err_free_channel_map:
 923         iwl_free_channel_map(priv);
 924 err:
 925         return ret;
 926 }
 927 EXPORT_SYMBOL(iwl_init_drv);
 928
 929 int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
 930 {
 931         int ret = 0;
 932         if (tx_power < IWL_TX_POWER_TARGET_POWER_MIN) {
 933                 IWL_WARNING("Requested user TXPOWER %d below limit.\n",
 934                             priv->tx_power_user_lmt);
 935                 return -EINVAL;
 936         }
 937
 938         if (tx_power > IWL_TX_POWER_TARGET_POWER_MAX) {
 939                 IWL_WARNING("Requested user TXPOWER %d above limit.\n",
 940                             priv->tx_power_user_lmt);
 941                 return -EINVAL;
 942         }
 943
 944         if (priv->tx_power_user_lmt != tx_power)
 945                 force = true;
 946
 947         priv->tx_power_user_lmt = tx_power;
 948
 949         if (force && priv->cfg->ops->lib->send_tx_power)
 950                 ret = priv->cfg->ops->lib->send_tx_power(priv);
 951
 952         return ret;
 953 }
 954 EXPORT_SYMBOL(iwl_set_tx_power);
 955
 956 void iwl_uninit_drv(struct iwl_priv *priv)
 957 {
 958         iwl_calib_free_results(priv);
 959         iwlcore_free_geos(priv);
 960         iwl_free_channel_map(priv);
 961         kfree(priv->scan);
 962 }
 963 EXPORT_SYMBOL(iwl_uninit_drv);
 964
 965 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags)
 966 {
 967         u32 stat_flags = 0;
 968         struct iwl_host_cmd cmd = {
 969                 .id = REPLY_STATISTICS_CMD,
 970                 .meta.flags = flags,
 971                 .len = sizeof(stat_flags),
 972                 .data = (u8 *) &stat_flags,
 973         };
 974         return iwl_send_cmd(priv, &cmd);
 975 }
 976 EXPORT_SYMBOL(iwl_send_statistics_request);
 977
 978 /**
 979  * iwl_verify_inst_sparse - verify runtime uCode image in card vs. host,
 980  *   using sample data 100 bytes apart.  If these sample points are good,
 981  *   it's a pretty good bet that everything between them is good, too.
 982  */
 983 static int iwlcore_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
 984 {
 985         u32 val;
 986         int ret = 0;
 987         u32 errcnt = 0;
 988         u32 i;
 989
 990         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
 991
 992         ret = iwl_grab_nic_access(priv);
 993         if (ret)
 994                 return ret;
 995
 996         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
 997                 /* read data comes through single port, auto-incr addr */
 998                 /* NOTE: Use the debugless read so we don't flood kernel log
 999                  * if IWL_DL_IO is set */
1000                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1001                         i + RTC_INST_LOWER_BOUND);
1002                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1003                 if (val != le32_to_cpu(*image)) {
1004                         ret = -EIO;
1005                         errcnt++;
1006                         if (errcnt >= 3)
1007                                 break;
1008                 }
1009         }
1010
1011         iwl_release_nic_access(priv);
1012
1013         return ret;
1014 }
1015
1016 /**
1017  * iwlcore_verify_inst_full - verify runtime uCode image in card vs. host,
1018  *     looking at all data.
1019  */
1020 static int iwl_verify_inst_full(struct iwl_priv *priv, __le32 *image,
1021                                  u32 len)
1022 {
1023         u32 val;
1024         u32 save_len = len;
1025         int ret = 0;
1026         u32 errcnt;
1027
1028         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
1029
1030         ret = iwl_grab_nic_access(priv);
1031         if (ret)
1032                 return ret;
1033
1034         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);
1035
1036         errcnt = 0;
1037         for (; len > 0; len -= sizeof(u32), image++) {
1038                 /* read data comes through single port, auto-incr addr */
1039                 /* NOTE: Use the debugless read so we don't flood kernel log
1040                  * if IWL_DL_IO is set */
1041                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1042                 if (val != le32_to_cpu(*image)) {
1043                         IWL_ERROR("uCode INST section is invalid at "
1044                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
1045                                   save_len - len, val, le32_to_cpu(*image));
1046                         ret = -EIO;
1047                         errcnt++;
1048                         if (errcnt >= 20)
1049                                 break;
1050                 }
1051         }
1052
1053         iwl_release_nic_access(priv);
1054
1055         if (!errcnt)
1056                 IWL_DEBUG_INFO
1057                     ("ucode image in INSTRUCTION memory is good\n");
1058
1059         return ret;
1060 }
1061
1062 /**
1063  * iwl_verify_ucode - determine which instruction image is in SRAM,
1064  *    and verify its contents
1065  */
1066 int iwl_verify_ucode(struct iwl_priv *priv)
1067 {
1068         __le32 *image;
1069         u32 len;
1070         int ret;
1071
1072         /* Try bootstrap */
1073         image = (__le32 *)priv->ucode_boot.v_addr;
1074         len = priv->ucode_boot.len;
1075         ret = iwlcore_verify_inst_sparse(priv, image, len);
1076         if (!ret) {
1077                 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
1078                 return 0;
1079         }
1080
1081         /* Try initialize */
1082         image = (__le32 *)priv->ucode_init.v_addr;
1083         len = priv->ucode_init.len;
1084         ret = iwlcore_verify_inst_sparse(priv, image, len);
1085         if (!ret) {
1086                 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
1087                 return 0;
1088         }
1089
1090         /* Try runtime/protocol */
1091         image = (__le32 *)priv->ucode_code.v_addr;
1092         len = priv->ucode_code.len;
1093         ret = iwlcore_verify_inst_sparse(priv, image, len);
1094         if (!ret) {
1095                 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
1096                 return 0;
1097         }
1098
1099         IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
1100
1101         /* Since nothing seems to match, show first several data entries in
1102          * instruction SRAM, so maybe visual inspection will give a clue.
1103          * Selection of bootstrap image (vs. other images) is arbitrary. */
1104         image = (__le32 *)priv->ucode_boot.v_addr;
1105         len = priv->ucode_boot.len;
1106         ret = iwl_verify_inst_full(priv, image, len);
1107
1108         return ret;
1109 }
1110 EXPORT_SYMBOL(iwl_verify_ucode);
1111
1112
1113 static const char *desc_lookup_text[] = {
1114         "OK",
1115         "FAIL",
1116         "BAD_PARAM",
1117         "BAD_CHECKSUM",
1118         "NMI_INTERRUPT_WDG",
1119         "SYSASSERT",
1120         "FATAL_ERROR",
1121         "BAD_COMMAND",
1122         "HW_ERROR_TUNE_LOCK",
1123         "HW_ERROR_TEMPERATURE",
1124         "ILLEGAL_CHAN_FREQ",
1125         "VCC_NOT_STABLE",
1126         "FH_ERROR",
1127         "NMI_INTERRUPT_HOST",
1128         "NMI_INTERRUPT_ACTION_PT",
1129         "NMI_INTERRUPT_UNKNOWN",
1130         "UCODE_VERSION_MISMATCH",
1131         "HW_ERROR_ABS_LOCK",
1132         "HW_ERROR_CAL_LOCK_FAIL",
1133         "NMI_INTERRUPT_INST_ACTION_PT",
1134         "NMI_INTERRUPT_DATA_ACTION_PT",
1135         "NMI_TRM_HW_ER",
1136         "NMI_INTERRUPT_TRM",
1137         "NMI_INTERRUPT_BREAK_POINT"
1138         "DEBUG_0",
1139         "DEBUG_1",
1140         "DEBUG_2",
1141         "DEBUG_3",
1142         "UNKNOWN"
1143 };
1144
1145 static const char *desc_lookup(int i)
1146 {
1147         int max = ARRAY_SIZE(desc_lookup_text) - 1;
1148
1149         if (i < 0 || i > max)
1150                 i = max;
1151
1152         return desc_lookup_text[i];
1153 }
1154
1155 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1156 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1157
1158 void iwl_dump_nic_error_log(struct iwl_priv *priv)
1159 {
1160         u32 data2, line;
1161         u32 desc, time, count, base, data1;
1162         u32 blink1, blink2, ilink1, ilink2;
1163         int ret;
1164
1165         if (priv->ucode_type == UCODE_INIT)
1166                 base = le32_to_cpu(priv->card_alive_init.error_event_table_ptr);
1167         else
1168                 base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1169
1170         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
1171                 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
1172                 return;
1173         }
1174
1175         ret = iwl_grab_nic_access(priv);
1176         if (ret) {
1177                 IWL_WARNING("Can not read from adapter at this time.\n");
1178                 return;
1179         }
1180
1181         count = iwl_read_targ_mem(priv, base);
1182
1183         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1184                 IWL_ERROR("Start IWL Error Log Dump:\n");
1185                 IWL_ERROR("Status: 0x%08lX, count: %d\n", priv->status, count);
1186         }
1187
1188         desc = iwl_read_targ_mem(priv, base + 1 * sizeof(u32));
1189         blink1 = iwl_read_targ_mem(priv, base + 3 * sizeof(u32));
1190         blink2 = iwl_read_targ_mem(priv, base + 4 * sizeof(u32));
1191         ilink1 = iwl_read_targ_mem(priv, base + 5 * sizeof(u32));
1192         ilink2 = iwl_read_targ_mem(priv, base + 6 * sizeof(u32));
1193         data1 = iwl_read_targ_mem(priv, base + 7 * sizeof(u32));
1194         data2 = iwl_read_targ_mem(priv, base + 8 * sizeof(u32));
1195         line = iwl_read_targ_mem(priv, base + 9 * sizeof(u32));
1196         time = iwl_read_targ_mem(priv, base + 11 * sizeof(u32));
1197
1198         IWL_ERROR("Desc                               Time       "
1199                 "data1      data2      line\n");
1200         IWL_ERROR("%-28s (#%02d) %010u 0x%08X 0x%08X %u\n",
1201                 desc_lookup(desc), desc, time, data1, data2, line);
1202         IWL_ERROR("blink1  blink2  ilink1  ilink2\n");
1203         IWL_ERROR("0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
1204                 ilink1, ilink2);
1205
1206         iwl_release_nic_access(priv);
1207 }
1208 EXPORT_SYMBOL(iwl_dump_nic_error_log);
1209
1210 #define EVENT_START_OFFSET  (4 * sizeof(u32))
1211
1212 /**
1213  * iwl_print_event_log - Dump error event log to syslog
1214  *
1215  * NOTE: Must be called with iwl_grab_nic_access() already obtained!
1216  */
1217 static void iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
1218                                 u32 num_events, u32 mode)
1219 {
1220         u32 i;
1221         u32 base;       /* SRAM byte address of event log header */
1222         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1223         u32 ptr;        /* SRAM byte address of log data */
1224         u32 ev, time, data; /* event log data */
1225
1226         if (num_events == 0)
1227                 return;
1228         if (priv->ucode_type == UCODE_INIT)
1229                 base = le32_to_cpu(priv->card_alive_init.log_event_table_ptr);
1230         else
1231                 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1232
1233         if (mode == 0)
1234                 event_size = 2 * sizeof(u32);
1235         else
1236                 event_size = 3 * sizeof(u32);
1237
1238         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1239
1240         /* "time" is actually "data" for mode 0 (no timestamp).
1241         * place event id # at far right for easier visual parsing. */
1242         for (i = 0; i < num_events; i++) {
1243                 ev = iwl_read_targ_mem(priv, ptr);
1244                 ptr += sizeof(u32);
1245                 time = iwl_read_targ_mem(priv, ptr);
1246                 ptr += sizeof(u32);
1247                 if (mode == 0) {
1248                         /* data, ev */
1249                         IWL_ERROR("EVT_LOG:0x%08x:%04u\n", time, ev);
1250                 } else {
1251                         data = iwl_read_targ_mem(priv, ptr);
1252                         ptr += sizeof(u32);
1253                         IWL_ERROR("EVT_LOGT:%010u:0x%08x:%04u\n",
1254                                         time, data, ev);
1255                 }
1256         }
1257 }
1258
1259 void iwl_dump_nic_event_log(struct iwl_priv *priv)
1260 {
1261         int ret;
1262         u32 base;       /* SRAM byte address of event log header */
1263         u32 capacity;   /* event log capacity in # entries */
1264         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1265         u32 num_wraps;  /* # times uCode wrapped to top of log */
1266         u32 next_entry; /* index of next entry to be written by uCode */
1267         u32 size;       /* # entries that we'll print */
1268
1269         if (priv->ucode_type == UCODE_INIT)
1270                 base = le32_to_cpu(priv->card_alive_init.log_event_table_ptr);
1271         else
1272                 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1273
1274         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
1275                 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
1276                 return;
1277         }
1278
1279         ret = iwl_grab_nic_access(priv);
1280         if (ret) {
1281                 IWL_WARNING("Can not read from adapter at this time.\n");
1282                 return;
1283         }
1284
1285         /* event log header */
1286         capacity = iwl_read_targ_mem(priv, base);
1287         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1288         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1289         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1290
1291         size = num_wraps ? capacity : next_entry;
1292
1293         /* bail out if nothing in log */
1294         if (size == 0) {
1295                 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
1296                 iwl_release_nic_access(priv);
1297                 return;
1298         }
1299
1300         IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
1301                         size, num_wraps);
1302
1303         /* if uCode has wrapped back to top of log, start at the oldest entry,
1304          * i.e the next one that uCode would fill. */
1305         if (num_wraps)
1306                 iwl_print_event_log(priv, next_entry,
1307                                         capacity - next_entry, mode);
1308         /* (then/else) start at top of log */
1309         iwl_print_event_log(priv, 0, next_entry, mode);
1310
1311         iwl_release_nic_access(priv);
1312 }
1313 EXPORT_SYMBOL(iwl_dump_nic_event_log);
1314
1315 void iwl_rf_kill_ct_config(struct iwl_priv *priv)
1316 {
1317         struct iwl_ct_kill_config cmd;
1318         unsigned long flags;
1319         int ret = 0;
1320
1321         spin_lock_irqsave(&priv->lock, flags);
1322         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
1323                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
1324         spin_unlock_irqrestore(&priv->lock, flags);
1325
1326         cmd.critical_temperature_R =
1327                 cpu_to_le32(priv->hw_params.ct_kill_threshold);
1328
1329         ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
1330                                sizeof(cmd), &cmd);
1331         if (ret)
1332                 IWL_ERROR("REPLY_CT_KILL_CONFIG_CMD failed\n");
1333         else
1334                 IWL_DEBUG_INFO("REPLY_CT_KILL_CONFIG_CMD succeeded, "
1335                         "critical temperature is %d\n",
1336                         cmd.critical_temperature_R);
1337 }
1338 EXPORT_SYMBOL(iwl_rf_kill_ct_config);
1339
1340 /*
1341  * CARD_STATE_CMD
1342  *
1343  * Use: Sets the device's internal card state to enable, disable, or halt
1344  *
1345  * When in the 'enable' state the card operates as normal.
1346  * When in the 'disable' state, the card enters into a low power mode.
1347  * When in the 'halt' state, the card is shut down and must be fully
1348  * restarted to come back on.
1349  */
1350 static int iwl_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
1351 {
1352         struct iwl_host_cmd cmd = {
1353                 .id = REPLY_CARD_STATE_CMD,
1354                 .len = sizeof(u32),
1355                 .data = &flags,
1356                 .meta.flags = meta_flag,
1357         };
1358
1359         return iwl_send_cmd(priv, &cmd);
1360 }
1361
1362 void iwl_radio_kill_sw_disable_radio(struct iwl_priv *priv)
1363 {
1364         unsigned long flags;
1365
1366         if (test_bit(STATUS_RF_KILL_SW, &priv->status))
1367                 return;
1368
1369         IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO OFF\n");
1370
1371         iwl_scan_cancel(priv);
1372         /* FIXME: This is a workaround for AP */
1373         if (priv->iw_mode != NL80211_IFTYPE_AP) {
1374                 spin_lock_irqsave(&priv->lock, flags);
1375                 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
1376                             CSR_UCODE_SW_BIT_RFKILL);
1377                 spin_unlock_irqrestore(&priv->lock, flags);
1378                 /* call the host command only if no hw rf-kill set */
1379                 if (!test_bit(STATUS_RF_KILL_HW, &priv->status) &&
1380                     iwl_is_ready(priv))
1381                         iwl_send_card_state(priv,
1382                                 CARD_STATE_CMD_DISABLE, 0);
1383                 set_bit(STATUS_RF_KILL_SW, &priv->status);
1384                         /* make sure mac80211 stop sending Tx frame */
1385                 if (priv->mac80211_registered)
1386                         ieee80211_stop_queues(priv->hw);
1387         }
1388 }
1389 EXPORT_SYMBOL(iwl_radio_kill_sw_disable_radio);
1390
1391 int iwl_radio_kill_sw_enable_radio(struct iwl_priv *priv)
1392 {
1393         unsigned long flags;
1394
1395         if (!test_bit(STATUS_RF_KILL_SW, &priv->status))
1396                 return 0;
1397
1398         IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO ON\n");
1399
1400         spin_lock_irqsave(&priv->lock, flags);
1401         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1402
1403         /* If the driver is up it will receive CARD_STATE_NOTIFICATION
1404          * notification where it will clear SW rfkill status.
1405          * Setting it here would break the handler. Only if the
1406          * interface is down we can set here since we don't
1407          * receive any further notification.
1408          */
1409         if (!priv->is_open)
1410                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
1411         spin_unlock_irqrestore(&priv->lock, flags);
1412
1413         /* wake up ucode */
1414         msleep(10);
1415
1416         spin_lock_irqsave(&priv->lock, flags);
1417         iwl_read32(priv, CSR_UCODE_DRV_GP1);
1418         if (!iwl_grab_nic_access(priv))
1419                 iwl_release_nic_access(priv);
1420         spin_unlock_irqrestore(&priv->lock, flags);
1421
1422         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
1423                 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
1424                                   "disabled by HW switch\n");
1425                 return 0;
1426         }
1427
1428         /* If the driver is already loaded, it will receive
1429          * CARD_STATE_NOTIFICATION notifications and the handler will
1430          * call restart to reload the driver.
1431          */
1432         return 1;
1433 }
1434 EXPORT_SYMBOL(iwl_radio_kill_sw_enable_radio);