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 - 2009 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  *  Intel Linux Wireless <ilw@linux.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 " " DRV_AUTHOR);
  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                 printk(KERN_ERR "%s: Can not allocate network device\n",
 174                        cfg->name);
 175                 goto out;
 176         }
 177
 178         priv = hw->priv;
 179         priv->hw = hw;
 180
 181 out:
 182         return hw;
 183 }
 184 EXPORT_SYMBOL(iwl_alloc_all);
 185
 186 void iwl_hw_detect(struct iwl_priv *priv)
 187 {
 188         priv->hw_rev = _iwl_read32(priv, CSR_HW_REV);
 189         priv->hw_wa_rev = _iwl_read32(priv, CSR_HW_REV_WA_REG);
 190         pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &priv->rev_id);
 191 }
 192 EXPORT_SYMBOL(iwl_hw_detect);
 193
 194 int iwl_hw_nic_init(struct iwl_priv *priv)
 195 {
 196         unsigned long flags;
 197         struct iwl_rx_queue *rxq = &priv->rxq;
 198         int ret;
 199
 200         /* nic_init */
 201         spin_lock_irqsave(&priv->lock, flags);
 202         priv->cfg->ops->lib->apm_ops.init(priv);
 203         iwl_write32(priv, CSR_INT_COALESCING, 512 / 32);
 204         spin_unlock_irqrestore(&priv->lock, flags);
 205
 206         ret = priv->cfg->ops->lib->apm_ops.set_pwr_src(priv, IWL_PWR_SRC_VMAIN);
 207
 208         priv->cfg->ops->lib->apm_ops.config(priv);
 209
 210         /* Allocate the RX queue, or reset if it is already allocated */
 211         if (!rxq->bd) {
 212                 ret = iwl_rx_queue_alloc(priv);
 213                 if (ret) {
 214                         IWL_ERR(priv, "Unable to initialize Rx queue\n");
 215                         return -ENOMEM;
 216                 }
 217         } else
 218                 iwl_rx_queue_reset(priv, rxq);
 219
 220         iwl_rx_replenish(priv);
 221
 222         iwl_rx_init(priv, rxq);
 223
 224         spin_lock_irqsave(&priv->lock, flags);
 225
 226         rxq->need_update = 1;
 227         iwl_rx_queue_update_write_ptr(priv, rxq);
 228
 229         spin_unlock_irqrestore(&priv->lock, flags);
 230
 231         /* Allocate and init all Tx and Command queues */
 232         ret = iwl_txq_ctx_reset(priv);
 233         if (ret)
 234                 return ret;
 235
 236         set_bit(STATUS_INIT, &priv->status);
 237
 238         return 0;
 239 }
 240 EXPORT_SYMBOL(iwl_hw_nic_init);
 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         bool is_legacy = false;
 248         unsigned long flags;
 249         int i;
 250
 251         spin_lock_irqsave(&priv->lock, flags);
 252         /* QoS always active in AP and ADHOC mode
 253          * In STA mode wait for association
 254          */
 255         if (priv->iw_mode == NL80211_IFTYPE_ADHOC ||
 256             priv->iw_mode == NL80211_IFTYPE_AP)
 257                 priv->qos_data.qos_active = 1;
 258         else
 259                 priv->qos_data.qos_active = 0;
 260
 261         /* check for legacy mode */
 262         if ((priv->iw_mode == NL80211_IFTYPE_ADHOC &&
 263             (priv->active_rate & IWL_OFDM_RATES_MASK) == 0) ||
 264             (priv->iw_mode == NL80211_IFTYPE_STATION &&
 265             (priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK) == 0)) {
 266                 cw_min = 31;
 267                 is_legacy = 1;
 268         }
 269
 270         if (priv->qos_data.qos_active)
 271                 aifs = 3;
 272
 273         priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
 274         priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
 275         priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
 276         priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
 277         priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;
 278
 279         if (priv->qos_data.qos_active) {
 280                 i = 1;
 281                 priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
 282                 priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
 283                 priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
 284                 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
 285                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 286
 287                 i = 2;
 288                 priv->qos_data.def_qos_parm.ac[i].cw_min =
 289                         cpu_to_le16((cw_min + 1) / 2 - 1);
 290                 priv->qos_data.def_qos_parm.ac[i].cw_max =
 291                         cpu_to_le16(cw_max);
 292                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
 293                 if (is_legacy)
 294                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 295                                 cpu_to_le16(6016);
 296                 else
 297                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 298                                 cpu_to_le16(3008);
 299                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 300
 301                 i = 3;
 302                 priv->qos_data.def_qos_parm.ac[i].cw_min =
 303                         cpu_to_le16((cw_min + 1) / 4 - 1);
 304                 priv->qos_data.def_qos_parm.ac[i].cw_max =
 305                         cpu_to_le16((cw_max + 1) / 2 - 1);
 306                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
 307                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 308                 if (is_legacy)
 309                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 310                                 cpu_to_le16(3264);
 311                 else
 312                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 313                                 cpu_to_le16(1504);
 314         } else {
 315                 for (i = 1; i < 4; i++) {
 316                         priv->qos_data.def_qos_parm.ac[i].cw_min =
 317                                 cpu_to_le16(cw_min);
 318                         priv->qos_data.def_qos_parm.ac[i].cw_max =
 319                                 cpu_to_le16(cw_max);
 320                         priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
 321                         priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
 322                         priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 323                 }
 324         }
 325         IWL_DEBUG_QOS("set QoS to default \n");
 326
 327         spin_unlock_irqrestore(&priv->lock, flags);
 328 }
 329 EXPORT_SYMBOL(iwl_reset_qos);
 330
 331 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
 332 #define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
 333 static void iwlcore_init_ht_hw_capab(const struct iwl_priv *priv,
 334                               struct ieee80211_sta_ht_cap *ht_info,
 335                               enum ieee80211_band band)
 336 {
 337         u16 max_bit_rate = 0;
 338         u8 rx_chains_num = priv->hw_params.rx_chains_num;
 339         u8 tx_chains_num = priv->hw_params.tx_chains_num;
 340
 341         ht_info->cap = 0;
 342         memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
 343
 344         ht_info->ht_supported = true;
 345
 346         ht_info->cap |= IEEE80211_HT_CAP_GRN_FLD;
 347         ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
 348         ht_info->cap |= (IEEE80211_HT_CAP_SM_PS &
 349                              (WLAN_HT_CAP_SM_PS_DISABLED << 2));
 350
 351         max_bit_rate = MAX_BIT_RATE_20_MHZ;
 352         if (priv->hw_params.fat_channel & BIT(band)) {
 353                 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 354                 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
 355                 ht_info->mcs.rx_mask[4] = 0x01;
 356                 max_bit_rate = MAX_BIT_RATE_40_MHZ;
 357         }
 358
 359         if (priv->cfg->mod_params->amsdu_size_8K)
 360                 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
 361
 362         ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
 363         ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
 364
 365         ht_info->mcs.rx_mask[0] = 0xFF;
 366         if (rx_chains_num >= 2)
 367                 ht_info->mcs.rx_mask[1] = 0xFF;
 368         if (rx_chains_num >= 3)
 369                 ht_info->mcs.rx_mask[2] = 0xFF;
 370
 371         /* Highest supported Rx data rate */
 372         max_bit_rate *= rx_chains_num;
 373         WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
 374         ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
 375
 376         /* Tx MCS capabilities */
 377         ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
 378         if (tx_chains_num != rx_chains_num) {
 379                 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
 380                 ht_info->mcs.tx_params |= ((tx_chains_num - 1) <<
 381                                 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
 382         }
 383 }
 384
 385 static void iwlcore_init_hw_rates(struct iwl_priv *priv,
 386                               struct ieee80211_rate *rates)
 387 {
 388         int i;
 389
 390         for (i = 0; i < IWL_RATE_COUNT; i++) {
 391                 rates[i].bitrate = iwl_rates[i].ieee * 5;
 392                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
 393                 rates[i].hw_value_short = i;
 394                 rates[i].flags = 0;
 395                 if ((i > IWL_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
 396                         /*
 397                          * If CCK != 1M then set short preamble rate flag.
 398                          */
 399                         rates[i].flags |=
 400                                 (iwl_rates[i].plcp == IWL_RATE_1M_PLCP) ?
 401                                         0 : IEEE80211_RATE_SHORT_PREAMBLE;
 402                 }
 403         }
 404 }
 405
 406 /**
 407  * iwlcore_init_geos - Initialize mac80211's geo/channel info based from eeprom
 408  */
 409 static int iwlcore_init_geos(struct iwl_priv *priv)
 410 {
 411         struct iwl_channel_info *ch;
 412         struct ieee80211_supported_band *sband;
 413         struct ieee80211_channel *channels;
 414         struct ieee80211_channel *geo_ch;
 415         struct ieee80211_rate *rates;
 416         int i = 0;
 417
 418         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
 419             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
 420                 IWL_DEBUG_INFO("Geography modes already initialized.\n");
 421                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
 422                 return 0;
 423         }
 424
 425         channels = kzalloc(sizeof(struct ieee80211_channel) *
 426                            priv->channel_count, GFP_KERNEL);
 427         if (!channels)
 428                 return -ENOMEM;
 429
 430         rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_RATE_COUNT + 1)),
 431                         GFP_KERNEL);
 432         if (!rates) {
 433                 kfree(channels);
 434                 return -ENOMEM;
 435         }
 436
 437         /* 5.2GHz channels start after the 2.4GHz channels */
 438         sband = &priv->bands[IEEE80211_BAND_5GHZ];
 439         sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
 440         /* just OFDM */
 441         sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
 442         sband->n_bitrates = IWL_RATE_COUNT - IWL_FIRST_OFDM_RATE;
 443
 444         if (priv->cfg->sku & IWL_SKU_N)
 445                 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
 446                                          IEEE80211_BAND_5GHZ);
 447
 448         sband = &priv->bands[IEEE80211_BAND_2GHZ];
 449         sband->channels = channels;
 450         /* OFDM & CCK */
 451         sband->bitrates = rates;
 452         sband->n_bitrates = IWL_RATE_COUNT;
 453
 454         if (priv->cfg->sku & IWL_SKU_N)
 455                 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
 456                                          IEEE80211_BAND_2GHZ);
 457
 458         priv->ieee_channels = channels;
 459         priv->ieee_rates = rates;
 460
 461         iwlcore_init_hw_rates(priv, rates);
 462
 463         for (i = 0;  i < priv->channel_count; i++) {
 464                 ch = &priv->channel_info[i];
 465
 466                 /* FIXME: might be removed if scan is OK */
 467                 if (!is_channel_valid(ch))
 468                         continue;
 469
 470                 if (is_channel_a_band(ch))
 471                         sband =  &priv->bands[IEEE80211_BAND_5GHZ];
 472                 else
 473                         sband =  &priv->bands[IEEE80211_BAND_2GHZ];
 474
 475                 geo_ch = &sband->channels[sband->n_channels++];
 476
 477                 geo_ch->center_freq =
 478                                 ieee80211_channel_to_frequency(ch->channel);
 479                 geo_ch->max_power = ch->max_power_avg;
 480                 geo_ch->max_antenna_gain = 0xff;
 481                 geo_ch->hw_value = ch->channel;
 482
 483                 if (is_channel_valid(ch)) {
 484                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
 485                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
 486
 487                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
 488                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
 489
 490                         if (ch->flags & EEPROM_CHANNEL_RADAR)
 491                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
 492
 493                         geo_ch->flags |= ch->fat_extension_channel;
 494
 495                         if (ch->max_power_avg > priv->tx_power_channel_lmt)
 496                                 priv->tx_power_channel_lmt = ch->max_power_avg;
 497                 } else {
 498                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
 499                 }
 500
 501                 /* Save flags for reg domain usage */
 502                 geo_ch->orig_flags = geo_ch->flags;
 503
 504                 IWL_DEBUG_INFO("Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
 505                                 ch->channel, geo_ch->center_freq,
 506                                 is_channel_a_band(ch) ?  "5.2" : "2.4",
 507                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
 508                                 "restricted" : "valid",
 509                                  geo_ch->flags);
 510         }
 511
 512         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
 513              priv->cfg->sku & IWL_SKU_A) {
 514                 IWL_INFO(priv, "Incorrectly detected BG card as ABG. "
 515                         "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
 516                            priv->pci_dev->device,
 517                            priv->pci_dev->subsystem_device);
 518                 priv->cfg->sku &= ~IWL_SKU_A;
 519         }
 520
 521         IWL_INFO(priv, "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         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
 526
 527         return 0;
 528 }
 529
 530 /*
 531  * iwlcore_free_geos - undo allocations in iwlcore_init_geos
 532  */
 533 static void iwlcore_free_geos(struct iwl_priv *priv)
 534 {
 535         kfree(priv->ieee_channels);
 536         kfree(priv->ieee_rates);
 537         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
 538 }
 539
 540 static bool is_single_rx_stream(struct iwl_priv *priv)
 541 {
 542         return !priv->current_ht_config.is_ht ||
 543                ((priv->current_ht_config.mcs.rx_mask[1] == 0) &&
 544                 (priv->current_ht_config.mcs.rx_mask[2] == 0));
 545 }
 546
 547 static u8 iwl_is_channel_extension(struct iwl_priv *priv,
 548                                    enum ieee80211_band band,
 549                                    u16 channel, u8 extension_chan_offset)
 550 {
 551         const struct iwl_channel_info *ch_info;
 552
 553         ch_info = iwl_get_channel_info(priv, band, channel);
 554         if (!is_channel_valid(ch_info))
 555                 return 0;
 556
 557         if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
 558                 return !(ch_info->fat_extension_channel &
 559                                         IEEE80211_CHAN_NO_FAT_ABOVE);
 560         else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
 561                 return !(ch_info->fat_extension_channel &
 562                                         IEEE80211_CHAN_NO_FAT_BELOW);
 563
 564         return 0;
 565 }
 566
 567 u8 iwl_is_fat_tx_allowed(struct iwl_priv *priv,
 568                          struct ieee80211_sta_ht_cap *sta_ht_inf)
 569 {
 570         struct iwl_ht_info *iwl_ht_conf = &priv->current_ht_config;
 571
 572         if ((!iwl_ht_conf->is_ht) ||
 573            (iwl_ht_conf->supported_chan_width != IWL_CHANNEL_WIDTH_40MHZ) ||
 574            (iwl_ht_conf->extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_NONE))
 575                 return 0;
 576
 577         if (sta_ht_inf) {
 578                 if ((!sta_ht_inf->ht_supported) ||
 579                    (!(sta_ht_inf->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)))
 580                         return 0;
 581         }
 582
 583         return iwl_is_channel_extension(priv, priv->band,
 584                                         le16_to_cpu(priv->staging_rxon.channel),
 585                                         iwl_ht_conf->extension_chan_offset);
 586 }
 587 EXPORT_SYMBOL(iwl_is_fat_tx_allowed);
 588
 589 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_info *ht_info)
 590 {
 591         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 592         u32 val;
 593
 594         if (!ht_info->is_ht) {
 595                 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
 596                         RXON_FLG_CHANNEL_MODE_PURE_40_MSK |
 597                         RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
 598                         RXON_FLG_FAT_PROT_MSK |
 599                         RXON_FLG_HT_PROT_MSK);
 600                 return;
 601         }
 602
 603         /* Set up channel bandwidth:  20 MHz only, or 20/40 mixed if fat ok */
 604         if (iwl_is_fat_tx_allowed(priv, NULL))
 605                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED_MSK;
 606         else
 607                 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
 608                                  RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
 609
 610         /* Note: control channel is opposite of extension channel */
 611         switch (ht_info->extension_chan_offset) {
 612         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 613                 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 614                 break;
 615         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 616                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 617                 break;
 618         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
 619         default:
 620                 rxon->flags &= ~RXON_FLG_CHANNEL_MODE_MIXED_MSK;
 621                 break;
 622         }
 623
 624         val = ht_info->ht_protection;
 625
 626         rxon->flags |= cpu_to_le32(val << RXON_FLG_HT_OPERATING_MODE_POS);
 627
 628         iwl_set_rxon_chain(priv);
 629
 630         IWL_DEBUG_ASSOC("supported HT rate 0x%X 0x%X 0x%X "
 631                         "rxon flags 0x%X operation mode :0x%X "
 632                         "extension channel offset 0x%x\n",
 633                         ht_info->mcs.rx_mask[0],
 634                         ht_info->mcs.rx_mask[1],
 635                         ht_info->mcs.rx_mask[2],
 636                         le32_to_cpu(rxon->flags), ht_info->ht_protection,
 637                         ht_info->extension_chan_offset);
 638         return;
 639 }
 640 EXPORT_SYMBOL(iwl_set_rxon_ht);
 641
 642 #define IWL_NUM_RX_CHAINS_MULTIPLE      3
 643 #define IWL_NUM_RX_CHAINS_SINGLE        2
 644 #define IWL_NUM_IDLE_CHAINS_DUAL        2
 645 #define IWL_NUM_IDLE_CHAINS_SINGLE      1
 646
 647 /* Determine how many receiver/antenna chains to use.
 648  * More provides better reception via diversity.  Fewer saves power.
 649  * MIMO (dual stream) requires at least 2, but works better with 3.
 650  * This does not determine *which* chains to use, just how many.
 651  */
 652 static int iwl_get_active_rx_chain_count(struct iwl_priv *priv)
 653 {
 654         bool is_single = is_single_rx_stream(priv);
 655         bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
 656
 657         /* # of Rx chains to use when expecting MIMO. */
 658         if (is_single || (!is_cam && (priv->current_ht_config.sm_ps ==
 659                                                  WLAN_HT_CAP_SM_PS_STATIC)))
 660                 return IWL_NUM_RX_CHAINS_SINGLE;
 661         else
 662                 return IWL_NUM_RX_CHAINS_MULTIPLE;
 663 }
 664
 665 static int iwl_get_idle_rx_chain_count(struct iwl_priv *priv, int active_cnt)
 666 {
 667         int idle_cnt;
 668         bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
 669         /* # Rx chains when idling and maybe trying to save power */
 670         switch (priv->current_ht_config.sm_ps) {
 671         case WLAN_HT_CAP_SM_PS_STATIC:
 672         case WLAN_HT_CAP_SM_PS_DYNAMIC:
 673                 idle_cnt = (is_cam) ? IWL_NUM_IDLE_CHAINS_DUAL :
 674                                         IWL_NUM_IDLE_CHAINS_SINGLE;
 675                 break;
 676         case WLAN_HT_CAP_SM_PS_DISABLED:
 677                 idle_cnt = (is_cam) ? active_cnt : IWL_NUM_IDLE_CHAINS_SINGLE;
 678                 break;
 679         case WLAN_HT_CAP_SM_PS_INVALID:
 680         default:
 681                 IWL_ERR(priv, "invalid mimo ps mode %d\n",
 682                            priv->current_ht_config.sm_ps);
 683                 WARN_ON(1);
 684                 idle_cnt = -1;
 685                 break;
 686         }
 687         return idle_cnt;
 688 }
 689
 690 /* up to 4 chains */
 691 static u8 iwl_count_chain_bitmap(u32 chain_bitmap)
 692 {
 693         u8 res;
 694         res = (chain_bitmap & BIT(0)) >> 0;
 695         res += (chain_bitmap & BIT(1)) >> 1;
 696         res += (chain_bitmap & BIT(2)) >> 2;
 697         res += (chain_bitmap & BIT(4)) >> 4;
 698         return res;
 699 }
 700
 701 /**
 702  * iwl_is_monitor_mode - Determine if interface in monitor mode
 703  *
 704  * priv->iw_mode is set in add_interface, but add_interface is
 705  * never called for monitor mode. The only way mac80211 informs us about
 706  * monitor mode is through configuring filters (call to configure_filter).
 707  */
 708 static bool iwl_is_monitor_mode(struct iwl_priv *priv)
 709 {
 710         return !!(priv->staging_rxon.filter_flags & RXON_FILTER_PROMISC_MSK);
 711 }
 712
 713 /**
 714  * iwl_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
 715  *
 716  * Selects how many and which Rx receivers/antennas/chains to use.
 717  * This should not be used for scan command ... it puts data in wrong place.
 718  */
 719 void iwl_set_rxon_chain(struct iwl_priv *priv)
 720 {
 721         bool is_single = is_single_rx_stream(priv);
 722         bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
 723         u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt;
 724         u32 active_chains;
 725         u16 rx_chain;
 726
 727         /* Tell uCode which antennas are actually connected.
 728          * Before first association, we assume all antennas are connected.
 729          * Just after first association, iwl_chain_noise_calibration()
 730          *    checks which antennas actually *are* connected. */
 731          if (priv->chain_noise_data.active_chains)
 732                 active_chains = priv->chain_noise_data.active_chains;
 733         else
 734                 active_chains = priv->hw_params.valid_rx_ant;
 735
 736         rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;
 737
 738         /* How many receivers should we use? */
 739         active_rx_cnt = iwl_get_active_rx_chain_count(priv);
 740         idle_rx_cnt = iwl_get_idle_rx_chain_count(priv, active_rx_cnt);
 741
 742
 743         /* correct rx chain count according hw settings
 744          * and chain noise calibration
 745          */
 746         valid_rx_cnt = iwl_count_chain_bitmap(active_chains);
 747         if (valid_rx_cnt < active_rx_cnt)
 748                 active_rx_cnt = valid_rx_cnt;
 749
 750         if (valid_rx_cnt < idle_rx_cnt)
 751                 idle_rx_cnt = valid_rx_cnt;
 752
 753         rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS;
 754         rx_chain |= idle_rx_cnt  << RXON_RX_CHAIN_CNT_POS;
 755
 756         priv->staging_rxon.rx_chain = cpu_to_le16(rx_chain);
 757
 758         if (!is_single && (active_rx_cnt >= IWL_NUM_RX_CHAINS_SINGLE) && is_cam)
 759                 priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
 760         else
 761                 priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
 762
 763         IWL_DEBUG_ASSOC("rx_chain=0x%X active=%d idle=%d\n",
 764                         priv->staging_rxon.rx_chain,
 765                         active_rx_cnt, idle_rx_cnt);
 766
 767         WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
 768                 active_rx_cnt < idle_rx_cnt);
 769 }
 770 EXPORT_SYMBOL(iwl_set_rxon_chain);
 771
 772 /**
 773  * iwl_set_rxon_channel - Set the phymode and channel values in staging RXON
 774  * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
 775  * @channel: Any channel valid for the requested phymode
 776
 777  * In addition to setting the staging RXON, priv->phymode is also set.
 778  *
 779  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 780  * in the staging RXON flag structure based on the phymode
 781  */
 782 int iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch)
 783 {
 784         enum ieee80211_band band = ch->band;
 785         u16 channel = ieee80211_frequency_to_channel(ch->center_freq);
 786
 787         if (!iwl_get_channel_info(priv, band, channel)) {
 788                 IWL_DEBUG_INFO("Could not set channel to %d [%d]\n",
 789                                channel, band);
 790                 return -EINVAL;
 791         }
 792
 793         if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
 794             (priv->band == band))
 795                 return 0;
 796
 797         priv->staging_rxon.channel = cpu_to_le16(channel);
 798         if (band == IEEE80211_BAND_5GHZ)
 799                 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
 800         else
 801                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 802
 803         priv->band = band;
 804
 805         IWL_DEBUG_INFO("Staging channel set to %d [%d]\n", channel, band);
 806
 807         return 0;
 808 }
 809 EXPORT_SYMBOL(iwl_set_rxon_channel);
 810
 811 int iwl_setup_mac(struct iwl_priv *priv)
 812 {
 813         int ret;
 814         struct ieee80211_hw *hw = priv->hw;
 815         hw->rate_control_algorithm = "iwl-agn-rs";
 816
 817         /* Tell mac80211 our characteristics */
 818         hw->flags = IEEE80211_HW_SIGNAL_DBM |
 819                     IEEE80211_HW_NOISE_DBM |
 820                     IEEE80211_HW_AMPDU_AGGREGATION |
 821                     IEEE80211_HW_SUPPORTS_PS;
 822         hw->wiphy->interface_modes =
 823                 BIT(NL80211_IFTYPE_STATION) |
 824                 BIT(NL80211_IFTYPE_ADHOC);
 825
 826         hw->wiphy->custom_regulatory = true;
 827
 828         /* Default value; 4 EDCA QOS priorities */
 829         hw->queues = 4;
 830         /* queues to support 11n aggregation */
 831         if (priv->cfg->sku & IWL_SKU_N)
 832                 hw->ampdu_queues = priv->cfg->mod_params->num_of_ampdu_queues;
 833
 834         hw->conf.beacon_int = 100;
 835         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 836
 837         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
 838                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 839                         &priv->bands[IEEE80211_BAND_2GHZ];
 840         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
 841                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 842                         &priv->bands[IEEE80211_BAND_5GHZ];
 843
 844         ret = ieee80211_register_hw(priv->hw);
 845         if (ret) {
 846                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
 847                 return ret;
 848         }
 849         priv->mac80211_registered = 1;
 850
 851         return 0;
 852 }
 853 EXPORT_SYMBOL(iwl_setup_mac);
 854
 855 int iwl_set_hw_params(struct iwl_priv *priv)
 856 {
 857         priv->hw_params.sw_crypto = priv->cfg->mod_params->sw_crypto;
 858         priv->hw_params.max_rxq_size = RX_QUEUE_SIZE;
 859         priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
 860         if (priv->cfg->mod_params->amsdu_size_8K)
 861                 priv->hw_params.rx_buf_size = IWL_RX_BUF_SIZE_8K;
 862         else
 863                 priv->hw_params.rx_buf_size = IWL_RX_BUF_SIZE_4K;
 864         priv->hw_params.max_pkt_size = priv->hw_params.rx_buf_size - 256;
 865
 866         if (priv->cfg->mod_params->disable_11n)
 867                 priv->cfg->sku &= ~IWL_SKU_N;
 868
 869         /* Device-specific setup */
 870         return priv->cfg->ops->lib->set_hw_params(priv);
 871 }
 872 EXPORT_SYMBOL(iwl_set_hw_params);
 873
 874 int iwl_init_drv(struct iwl_priv *priv)
 875 {
 876         int ret;
 877
 878         priv->ibss_beacon = NULL;
 879
 880         spin_lock_init(&priv->lock);
 881         spin_lock_init(&priv->power_data.lock);
 882         spin_lock_init(&priv->sta_lock);
 883         spin_lock_init(&priv->hcmd_lock);
 884
 885         INIT_LIST_HEAD(&priv->free_frames);
 886
 887         mutex_init(&priv->mutex);
 888
 889         /* Clear the driver's (not device's) station table */
 890         iwl_clear_stations_table(priv);
 891
 892         priv->data_retry_limit = -1;
 893         priv->ieee_channels = NULL;
 894         priv->ieee_rates = NULL;
 895         priv->band = IEEE80211_BAND_2GHZ;
 896
 897         priv->iw_mode = NL80211_IFTYPE_STATION;
 898
 899         priv->current_ht_config.sm_ps = WLAN_HT_CAP_SM_PS_DISABLED;
 900
 901         /* Choose which receivers/antennas to use */
 902         iwl_set_rxon_chain(priv);
 903         iwl_init_scan_params(priv);
 904
 905         iwl_reset_qos(priv);
 906
 907         priv->qos_data.qos_active = 0;
 908         priv->qos_data.qos_cap.val = 0;
 909
 910         priv->rates_mask = IWL_RATES_MASK;
 911         /* If power management is turned on, default to AC mode */
 912         priv->power_mode = IWL_POWER_AC;
 913         priv->tx_power_user_lmt = IWL_TX_POWER_TARGET_POWER_MAX;
 914
 915         ret = iwl_init_channel_map(priv);
 916         if (ret) {
 917                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
 918                 goto err;
 919         }
 920
 921         ret = iwlcore_init_geos(priv);
 922         if (ret) {
 923                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
 924                 goto err_free_channel_map;
 925         }
 926
 927         return 0;
 928
 929 err_free_channel_map:
 930         iwl_free_channel_map(priv);
 931 err:
 932         return ret;
 933 }
 934 EXPORT_SYMBOL(iwl_init_drv);
 935
 936 int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
 937 {
 938         int ret = 0;
 939         if (tx_power < IWL_TX_POWER_TARGET_POWER_MIN) {
 940                 IWL_WARN(priv, "Requested user TXPOWER %d below limit.\n",
 941                             priv->tx_power_user_lmt);
 942                 return -EINVAL;
 943         }
 944
 945         if (tx_power > IWL_TX_POWER_TARGET_POWER_MAX) {
 946                 IWL_WARN(priv, "Requested user TXPOWER %d above limit.\n",
 947                             priv->tx_power_user_lmt);
 948                 return -EINVAL;
 949         }
 950
 951         if (priv->tx_power_user_lmt != tx_power)
 952                 force = true;
 953
 954         priv->tx_power_user_lmt = tx_power;
 955
 956         if (force && priv->cfg->ops->lib->send_tx_power)
 957                 ret = priv->cfg->ops->lib->send_tx_power(priv);
 958
 959         return ret;
 960 }
 961 EXPORT_SYMBOL(iwl_set_tx_power);
 962
 963 void iwl_uninit_drv(struct iwl_priv *priv)
 964 {
 965         iwl_calib_free_results(priv);
 966         iwlcore_free_geos(priv);
 967         iwl_free_channel_map(priv);
 968         kfree(priv->scan);
 969 }
 970 EXPORT_SYMBOL(iwl_uninit_drv);
 971
 972
 973 void iwl_disable_interrupts(struct iwl_priv *priv)
 974 {
 975         clear_bit(STATUS_INT_ENABLED, &priv->status);
 976
 977         /* disable interrupts from uCode/NIC to host */
 978         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
 979
 980         /* acknowledge/clear/reset any interrupts still pending
 981          * from uCode or flow handler (Rx/Tx DMA) */
 982         iwl_write32(priv, CSR_INT, 0xffffffff);
 983         iwl_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
 984         IWL_DEBUG_ISR("Disabled interrupts\n");
 985 }
 986 EXPORT_SYMBOL(iwl_disable_interrupts);
 987
 988 void iwl_enable_interrupts(struct iwl_priv *priv)
 989 {
 990         IWL_DEBUG_ISR("Enabling interrupts\n");
 991         set_bit(STATUS_INT_ENABLED, &priv->status);
 992         iwl_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
 993 }
 994 EXPORT_SYMBOL(iwl_enable_interrupts);
 995
 996 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags)
 997 {
 998         u32 stat_flags = 0;
 999         struct iwl_host_cmd cmd = {
1000                 .id = REPLY_STATISTICS_CMD,
1001                 .meta.flags = flags,
1002                 .len = sizeof(stat_flags),
1003                 .data = (u8 *) &stat_flags,
1004         };
1005         return iwl_send_cmd(priv, &cmd);
1006 }
1007 EXPORT_SYMBOL(iwl_send_statistics_request);
1008
1009 /**
1010  * iwl_verify_inst_sparse - verify runtime uCode image in card vs. host,
1011  *   using sample data 100 bytes apart.  If these sample points are good,
1012  *   it's a pretty good bet that everything between them is good, too.
1013  */
1014 static int iwlcore_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
1015 {
1016         u32 val;
1017         int ret = 0;
1018         u32 errcnt = 0;
1019         u32 i;
1020
1021         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
1022
1023         ret = iwl_grab_nic_access(priv);
1024         if (ret)
1025                 return ret;
1026
1027         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
1028                 /* read data comes through single port, auto-incr addr */
1029                 /* NOTE: Use the debugless read so we don't flood kernel log
1030                  * if IWL_DL_IO is set */
1031                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1032                         i + IWL49_RTC_INST_LOWER_BOUND);
1033                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1034                 if (val != le32_to_cpu(*image)) {
1035                         ret = -EIO;
1036                         errcnt++;
1037                         if (errcnt >= 3)
1038                                 break;
1039                 }
1040         }
1041
1042         iwl_release_nic_access(priv);
1043
1044         return ret;
1045 }
1046
1047 /**
1048  * iwlcore_verify_inst_full - verify runtime uCode image in card vs. host,
1049  *     looking at all data.
1050  */
1051 static int iwl_verify_inst_full(struct iwl_priv *priv, __le32 *image,
1052                                  u32 len)
1053 {
1054         u32 val;
1055         u32 save_len = len;
1056         int ret = 0;
1057         u32 errcnt;
1058
1059         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
1060
1061         ret = iwl_grab_nic_access(priv);
1062         if (ret)
1063                 return ret;
1064
1065         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1066                            IWL49_RTC_INST_LOWER_BOUND);
1067
1068         errcnt = 0;
1069         for (; len > 0; len -= sizeof(u32), image++) {
1070                 /* read data comes through single port, auto-incr addr */
1071                 /* NOTE: Use the debugless read so we don't flood kernel log
1072                  * if IWL_DL_IO is set */
1073                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1074                 if (val != le32_to_cpu(*image)) {
1075                         IWL_ERR(priv, "uCode INST section is invalid at "
1076                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
1077                                   save_len - len, val, le32_to_cpu(*image));
1078                         ret = -EIO;
1079                         errcnt++;
1080                         if (errcnt >= 20)
1081                                 break;
1082                 }
1083         }
1084
1085         iwl_release_nic_access(priv);
1086
1087         if (!errcnt)
1088                 IWL_DEBUG_INFO
1089                     ("ucode image in INSTRUCTION memory is good\n");
1090
1091         return ret;
1092 }
1093
1094 /**
1095  * iwl_verify_ucode - determine which instruction image is in SRAM,
1096  *    and verify its contents
1097  */
1098 int iwl_verify_ucode(struct iwl_priv *priv)
1099 {
1100         __le32 *image;
1101         u32 len;
1102         int ret;
1103
1104         /* Try bootstrap */
1105         image = (__le32 *)priv->ucode_boot.v_addr;
1106         len = priv->ucode_boot.len;
1107         ret = iwlcore_verify_inst_sparse(priv, image, len);
1108         if (!ret) {
1109                 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
1110                 return 0;
1111         }
1112
1113         /* Try initialize */
1114         image = (__le32 *)priv->ucode_init.v_addr;
1115         len = priv->ucode_init.len;
1116         ret = iwlcore_verify_inst_sparse(priv, image, len);
1117         if (!ret) {
1118                 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
1119                 return 0;
1120         }
1121
1122         /* Try runtime/protocol */
1123         image = (__le32 *)priv->ucode_code.v_addr;
1124         len = priv->ucode_code.len;
1125         ret = iwlcore_verify_inst_sparse(priv, image, len);
1126         if (!ret) {
1127                 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
1128                 return 0;
1129         }
1130
1131         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
1132
1133         /* Since nothing seems to match, show first several data entries in
1134          * instruction SRAM, so maybe visual inspection will give a clue.
1135          * Selection of bootstrap image (vs. other images) is arbitrary. */
1136         image = (__le32 *)priv->ucode_boot.v_addr;
1137         len = priv->ucode_boot.len;
1138         ret = iwl_verify_inst_full(priv, image, len);
1139
1140         return ret;
1141 }
1142 EXPORT_SYMBOL(iwl_verify_ucode);
1143
1144
1145 static const char *desc_lookup_text[] = {
1146         "OK",
1147         "FAIL",
1148         "BAD_PARAM",
1149         "BAD_CHECKSUM",
1150         "NMI_INTERRUPT_WDG",
1151         "SYSASSERT",
1152         "FATAL_ERROR",
1153         "BAD_COMMAND",
1154         "HW_ERROR_TUNE_LOCK",
1155         "HW_ERROR_TEMPERATURE",
1156         "ILLEGAL_CHAN_FREQ",
1157         "VCC_NOT_STABLE",
1158         "FH_ERROR",
1159         "NMI_INTERRUPT_HOST",
1160         "NMI_INTERRUPT_ACTION_PT",
1161         "NMI_INTERRUPT_UNKNOWN",
1162         "UCODE_VERSION_MISMATCH",
1163         "HW_ERROR_ABS_LOCK",
1164         "HW_ERROR_CAL_LOCK_FAIL",
1165         "NMI_INTERRUPT_INST_ACTION_PT",
1166         "NMI_INTERRUPT_DATA_ACTION_PT",
1167         "NMI_TRM_HW_ER",
1168         "NMI_INTERRUPT_TRM",
1169         "NMI_INTERRUPT_BREAK_POINT"
1170         "DEBUG_0",
1171         "DEBUG_1",
1172         "DEBUG_2",
1173         "DEBUG_3",
1174         "UNKNOWN"
1175 };
1176
1177 static const char *desc_lookup(int i)
1178 {
1179         int max = ARRAY_SIZE(desc_lookup_text) - 1;
1180
1181         if (i < 0 || i > max)
1182                 i = max;
1183
1184         return desc_lookup_text[i];
1185 }
1186
1187 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1188 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1189
1190 void iwl_dump_nic_error_log(struct iwl_priv *priv)
1191 {
1192         u32 data2, line;
1193         u32 desc, time, count, base, data1;
1194         u32 blink1, blink2, ilink1, ilink2;
1195         int ret;
1196
1197         if (priv->ucode_type == UCODE_INIT)
1198                 base = le32_to_cpu(priv->card_alive_init.error_event_table_ptr);
1199         else
1200                 base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1201
1202         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
1203                 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
1204                 return;
1205         }
1206
1207         ret = iwl_grab_nic_access(priv);
1208         if (ret) {
1209                 IWL_WARN(priv, "Can not read from adapter at this time.\n");
1210                 return;
1211         }
1212
1213         count = iwl_read_targ_mem(priv, base);
1214
1215         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1216                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1217                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1218                         priv->status, count);
1219         }
1220
1221         desc = iwl_read_targ_mem(priv, base + 1 * sizeof(u32));
1222         blink1 = iwl_read_targ_mem(priv, base + 3 * sizeof(u32));
1223         blink2 = iwl_read_targ_mem(priv, base + 4 * sizeof(u32));
1224         ilink1 = iwl_read_targ_mem(priv, base + 5 * sizeof(u32));
1225         ilink2 = iwl_read_targ_mem(priv, base + 6 * sizeof(u32));
1226         data1 = iwl_read_targ_mem(priv, base + 7 * sizeof(u32));
1227         data2 = iwl_read_targ_mem(priv, base + 8 * sizeof(u32));
1228         line = iwl_read_targ_mem(priv, base + 9 * sizeof(u32));
1229         time = iwl_read_targ_mem(priv, base + 11 * sizeof(u32));
1230
1231         IWL_ERR(priv, "Desc                               Time       "
1232                 "data1      data2      line\n");
1233         IWL_ERR(priv, "%-28s (#%02d) %010u 0x%08X 0x%08X %u\n",
1234                 desc_lookup(desc), desc, time, data1, data2, line);
1235         IWL_ERR(priv, "blink1  blink2  ilink1  ilink2\n");
1236         IWL_ERR(priv, "0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
1237                 ilink1, ilink2);
1238
1239         iwl_release_nic_access(priv);
1240 }
1241 EXPORT_SYMBOL(iwl_dump_nic_error_log);
1242
1243 #define EVENT_START_OFFSET  (4 * sizeof(u32))
1244
1245 /**
1246  * iwl_print_event_log - Dump error event log to syslog
1247  *
1248  * NOTE: Must be called with iwl_grab_nic_access() already obtained!
1249  */
1250 static void iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
1251                                 u32 num_events, u32 mode)
1252 {
1253         u32 i;
1254         u32 base;       /* SRAM byte address of event log header */
1255         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1256         u32 ptr;        /* SRAM byte address of log data */
1257         u32 ev, time, data; /* event log data */
1258
1259         if (num_events == 0)
1260                 return;
1261         if (priv->ucode_type == UCODE_INIT)
1262                 base = le32_to_cpu(priv->card_alive_init.log_event_table_ptr);
1263         else
1264                 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1265
1266         if (mode == 0)
1267                 event_size = 2 * sizeof(u32);
1268         else
1269                 event_size = 3 * sizeof(u32);
1270
1271         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1272
1273         /* "time" is actually "data" for mode 0 (no timestamp).
1274         * place event id # at far right for easier visual parsing. */
1275         for (i = 0; i < num_events; i++) {
1276                 ev = iwl_read_targ_mem(priv, ptr);
1277                 ptr += sizeof(u32);
1278                 time = iwl_read_targ_mem(priv, ptr);
1279                 ptr += sizeof(u32);
1280                 if (mode == 0) {
1281                         /* data, ev */
1282                         IWL_ERR(priv, "EVT_LOG:0x%08x:%04u\n", time, ev);
1283                 } else {
1284                         data = iwl_read_targ_mem(priv, ptr);
1285                         ptr += sizeof(u32);
1286                         IWL_ERR(priv, "EVT_LOGT:%010u:0x%08x:%04u\n",
1287                                         time, data, ev);
1288                 }
1289         }
1290 }
1291
1292 void iwl_dump_nic_event_log(struct iwl_priv *priv)
1293 {
1294         int ret;
1295         u32 base;       /* SRAM byte address of event log header */
1296         u32 capacity;   /* event log capacity in # entries */
1297         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1298         u32 num_wraps;  /* # times uCode wrapped to top of log */
1299         u32 next_entry; /* index of next entry to be written by uCode */
1300         u32 size;       /* # entries that we'll print */
1301
1302         if (priv->ucode_type == UCODE_INIT)
1303                 base = le32_to_cpu(priv->card_alive_init.log_event_table_ptr);
1304         else
1305                 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1306
1307         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
1308                 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
1309                 return;
1310         }
1311
1312         ret = iwl_grab_nic_access(priv);
1313         if (ret) {
1314                 IWL_WARN(priv, "Can not read from adapter at this time.\n");
1315                 return;
1316         }
1317
1318         /* event log header */
1319         capacity = iwl_read_targ_mem(priv, base);
1320         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1321         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1322         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1323
1324         size = num_wraps ? capacity : next_entry;
1325
1326         /* bail out if nothing in log */
1327         if (size == 0) {
1328                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1329                 iwl_release_nic_access(priv);
1330                 return;
1331         }
1332
1333         IWL_ERR(priv, "Start IWL Event Log Dump: display count %d, wraps %d\n",
1334                         size, num_wraps);
1335
1336         /* if uCode has wrapped back to top of log, start at the oldest entry,
1337          * i.e the next one that uCode would fill. */
1338         if (num_wraps)
1339                 iwl_print_event_log(priv, next_entry,
1340                                         capacity - next_entry, mode);
1341         /* (then/else) start at top of log */
1342         iwl_print_event_log(priv, 0, next_entry, mode);
1343
1344         iwl_release_nic_access(priv);
1345 }
1346 EXPORT_SYMBOL(iwl_dump_nic_event_log);
1347
1348 void iwl_rf_kill_ct_config(struct iwl_priv *priv)
1349 {
1350         struct iwl_ct_kill_config cmd;
1351         unsigned long flags;
1352         int ret = 0;
1353
1354         spin_lock_irqsave(&priv->lock, flags);
1355         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
1356                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
1357         spin_unlock_irqrestore(&priv->lock, flags);
1358
1359         cmd.critical_temperature_R =
1360                 cpu_to_le32(priv->hw_params.ct_kill_threshold);
1361
1362         ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
1363                                sizeof(cmd), &cmd);
1364         if (ret)
1365                 IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1366         else
1367                 IWL_DEBUG_INFO("REPLY_CT_KILL_CONFIG_CMD succeeded, "
1368                         "critical temperature is %d\n",
1369                         cmd.critical_temperature_R);
1370 }
1371 EXPORT_SYMBOL(iwl_rf_kill_ct_config);
1372
1373
1374 /*
1375  * CARD_STATE_CMD
1376  *
1377  * Use: Sets the device's internal card state to enable, disable, or halt
1378  *
1379  * When in the 'enable' state the card operates as normal.
1380  * When in the 'disable' state, the card enters into a low power mode.
1381  * When in the 'halt' state, the card is shut down and must be fully
1382  * restarted to come back on.
1383  */
1384 int iwl_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
1385 {
1386         struct iwl_host_cmd cmd = {
1387                 .id = REPLY_CARD_STATE_CMD,
1388                 .len = sizeof(u32),
1389                 .data = &flags,
1390                 .meta.flags = meta_flag,
1391         };
1392
1393         return iwl_send_cmd(priv, &cmd);
1394 }
1395 EXPORT_SYMBOL(iwl_send_card_state);
1396
1397 void iwl_radio_kill_sw_disable_radio(struct iwl_priv *priv)
1398 {
1399         unsigned long flags;
1400
1401         if (test_bit(STATUS_RF_KILL_SW, &priv->status))
1402                 return;
1403
1404         IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO OFF\n");
1405
1406         iwl_scan_cancel(priv);
1407         /* FIXME: This is a workaround for AP */
1408         if (priv->iw_mode != NL80211_IFTYPE_AP) {
1409                 spin_lock_irqsave(&priv->lock, flags);
1410                 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
1411                             CSR_UCODE_SW_BIT_RFKILL);
1412                 spin_unlock_irqrestore(&priv->lock, flags);
1413                 /* call the host command only if no hw rf-kill set */
1414                 if (!test_bit(STATUS_RF_KILL_HW, &priv->status) &&
1415                     iwl_is_ready(priv))
1416                         iwl_send_card_state(priv,
1417                                 CARD_STATE_CMD_DISABLE, 0);
1418                 set_bit(STATUS_RF_KILL_SW, &priv->status);
1419                         /* make sure mac80211 stop sending Tx frame */
1420                 if (priv->mac80211_registered)
1421                         ieee80211_stop_queues(priv->hw);
1422         }
1423 }
1424 EXPORT_SYMBOL(iwl_radio_kill_sw_disable_radio);
1425
1426 int iwl_radio_kill_sw_enable_radio(struct iwl_priv *priv)
1427 {
1428         unsigned long flags;
1429
1430         if (!test_bit(STATUS_RF_KILL_SW, &priv->status))
1431                 return 0;
1432
1433         IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO ON\n");
1434
1435         spin_lock_irqsave(&priv->lock, flags);
1436         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1437
1438         /* If the driver is up it will receive CARD_STATE_NOTIFICATION
1439          * notification where it will clear SW rfkill status.
1440          * Setting it here would break the handler. Only if the
1441          * interface is down we can set here since we don't
1442          * receive any further notification.
1443          */
1444         if (!priv->is_open)
1445                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
1446         spin_unlock_irqrestore(&priv->lock, flags);
1447
1448         /* wake up ucode */
1449         msleep(10);
1450
1451         spin_lock_irqsave(&priv->lock, flags);
1452         iwl_read32(priv, CSR_UCODE_DRV_GP1);
1453         if (!iwl_grab_nic_access(priv))
1454                 iwl_release_nic_access(priv);
1455         spin_unlock_irqrestore(&priv->lock, flags);
1456
1457         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
1458                 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
1459                                   "disabled by HW switch\n");
1460                 return 0;
1461         }
1462
1463         /* when driver is up while rfkill is on, it wont receive
1464          * any CARD_STATE_NOTIFICATION notifications so we have to
1465          * restart it in here
1466          */
1467         if (priv->is_open && !test_bit(STATUS_ALIVE, &priv->status)) {
1468                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
1469                 if (!iwl_is_rfkill(priv))
1470                         queue_work(priv->workqueue, &priv->up);
1471         }
1472
1473         /* If the driver is already loaded, it will receive
1474          * CARD_STATE_NOTIFICATION notifications and the handler will
1475          * call restart to reload the driver.
1476          */
1477         return 1;
1478 }
1479 EXPORT_SYMBOL(iwl_radio_kill_sw_enable_radio);
1480
1481 void iwl_bg_rf_kill(struct work_struct *work)
1482 {
1483         struct iwl_priv *priv = container_of(work, struct iwl_priv, rf_kill);
1484
1485         wake_up_interruptible(&priv->wait_command_queue);
1486
1487         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1488                 return;
1489
1490         mutex_lock(&priv->mutex);
1491
1492         if (!iwl_is_rfkill(priv)) {
1493                 IWL_DEBUG(IWL_DL_RF_KILL,
1494                           "HW and/or SW RF Kill no longer active, restarting "
1495                           "device\n");
1496                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status) &&
1497                     test_bit(STATUS_ALIVE, &priv->status))
1498                         queue_work(priv->workqueue, &priv->restart);
1499         } else {
1500                 /* make sure mac80211 stop sending Tx frame */
1501                 if (priv->mac80211_registered)
1502                         ieee80211_stop_queues(priv->hw);
1503
1504                 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
1505                         IWL_DEBUG_RF_KILL("Can not turn radio back on - "
1506                                           "disabled by SW switch\n");
1507                 else
1508                         IWL_WARN(priv, "Radio Frequency Kill Switch is On:\n"
1509                                     "Kill switch must be turned off for "
1510                                     "wireless networking to work.\n");
1511         }
1512         mutex_unlock(&priv->mutex);
1513         iwl_rfkill_set_hw_state(priv);
1514 }
1515 EXPORT_SYMBOL(iwl_bg_rf_kill);