drivers/net/wireless/iwlwifi/iwl-4965.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2007 Intel Corporation. All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of version 2 of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  17  *
  18  * The full GNU General Public License is included in this distribution in the
  19  * file called LICENSE.
  20  *
  21  * Contact Information:
  22  * James P. Ketrenos <ipw2100-admin@linux.intel.com>
  23  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  24  *
  25  *****************************************************************************/
  26
  27 #include <linux/kernel.h>
  28 #include <linux/module.h>
  29 #include <linux/version.h>
  30 #include <linux/init.h>
  31 #include <linux/pci.h>
  32 #include <linux/dma-mapping.h>
  33 #include <linux/delay.h>
  34 #include <linux/skbuff.h>
  35 #include <linux/netdevice.h>
  36 #include <linux/wireless.h>
  37 #include <net/mac80211.h>
  38 #include <linux/etherdevice.h>
  39
  40 #define IWL 4965
  41
  42 #include "iwlwifi.h"
  43 #include "iwl-4965.h"
  44 #include "iwl-helpers.h"
  45
  46 #define IWL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np)    \
  47         [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP,      \
  48                                     IWL_RATE_SISO_##s##M_PLCP, \
  49                                     IWL_RATE_MIMO_##s##M_PLCP, \
  50                                     IWL_RATE_##r##M_IEEE,      \
  51                                     IWL_RATE_##ip##M_INDEX,    \
  52                                     IWL_RATE_##in##M_INDEX,    \
  53                                     IWL_RATE_##rp##M_INDEX,    \
  54                                     IWL_RATE_##rn##M_INDEX,    \
  55                                     IWL_RATE_##pp##M_INDEX,    \
  56                                     IWL_RATE_##np##M_INDEX }
  57
  58 /*
  59  * Parameter order:
  60  *   rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate
  61  *
  62  * If there isn't a valid next or previous rate then INV is used which
  63  * maps to IWL_RATE_INVALID
  64  *
  65  */
  66 const struct iwl_rate_info iwl_rates[IWL_RATE_COUNT] = {
  67         IWL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2),    /*  1mbps */
  68         IWL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5),          /*  2mbps */
  69         IWL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11),        /*5.5mbps */
  70         IWL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18),      /* 11mbps */
  71         IWL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11),        /*  6mbps */
  72         IWL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11),       /*  9mbps */
  73         IWL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18),   /* 12mbps */
  74         IWL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24),   /* 18mbps */
  75         IWL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36),   /* 24mbps */
  76         IWL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48),   /* 36mbps */
  77         IWL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54),   /* 48mbps */
  78         IWL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */
  79         IWL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */
  80 };
  81
  82 static int is_fat_channel(__le32 rxon_flags)
  83 {
  84         return (rxon_flags & RXON_FLG_CHANNEL_MODE_PURE_40_MSK) ||
  85                 (rxon_flags & RXON_FLG_CHANNEL_MODE_MIXED_MSK);
  86 }
  87
  88 static u8 is_single_stream(struct iwl_priv *priv)
  89 {
  90 #ifdef CONFIG_IWLWIFI_HT
  91         if (!priv->is_ht_enabled || !priv->current_assoc_ht.is_ht ||
  92             (priv->active_rate_ht[1] == 0) ||
  93             (priv->ps_mode == IWL_MIMO_PS_STATIC))
  94                 return 1;
  95 #else
  96         return 1;
  97 #endif  /*CONFIG_IWLWIFI_HT */
  98         return 0;
  99 }
 100
 101 /*
 102  * Determine how many receiver/antenna chains to use.
 103  * More provides better reception via diversity.  Fewer saves power.
 104  * MIMO (dual stream) requires at least 2, but works better with 3.
 105  * This does not determine *which* chains to use, just how many.
 106  */
 107 static int iwl4965_get_rx_chain_counter(struct iwl_priv *priv,
 108                                         u8 *idle_state, u8 *rx_state)
 109 {
 110         u8 is_single = is_single_stream(priv);
 111         u8 is_cam = test_bit(STATUS_POWER_PMI, &priv->status) ? 0 : 1;
 112
 113         /* # of Rx chains to use when expecting MIMO. */
 114         if (is_single || (!is_cam && (priv->ps_mode == IWL_MIMO_PS_STATIC)))
 115                 *rx_state = 2;
 116         else
 117                 *rx_state = 3;
 118
 119         /* # Rx chains when idling and maybe trying to save power */
 120         switch (priv->ps_mode) {
 121         case IWL_MIMO_PS_STATIC:
 122         case IWL_MIMO_PS_DYNAMIC:
 123                 *idle_state = (is_cam) ? 2 : 1;
 124                 break;
 125         case IWL_MIMO_PS_NONE:
 126                 *idle_state = (is_cam) ? *rx_state : 1;
 127                 break;
 128         default:
 129                 *idle_state = 1;
 130                 break;
 131         }
 132
 133         return 0;
 134 }
 135
 136 int iwl_hw_rxq_stop(struct iwl_priv *priv)
 137 {
 138         int rc;
 139         unsigned long flags;
 140
 141         spin_lock_irqsave(&priv->lock, flags);
 142         rc = iwl_grab_restricted_access(priv);
 143         if (rc) {
 144                 spin_unlock_irqrestore(&priv->lock, flags);
 145                 return rc;
 146         }
 147
 148         /* stop HW */
 149         iwl_write_restricted(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0);
 150         rc = iwl_poll_restricted_bit(priv, FH_MEM_RSSR_RX_STATUS_REG,
 151                                      (1 << 24), 1000);
 152         if (rc < 0)
 153                 IWL_ERROR("Can't stop Rx DMA.\n");
 154
 155         iwl_release_restricted_access(priv);
 156         spin_unlock_irqrestore(&priv->lock, flags);
 157
 158         return 0;
 159 }
 160
 161 u8 iwl_hw_find_station(struct iwl_priv *priv, const u8 *addr)
 162 {
 163         int i;
 164         int start = 0;
 165         int ret = IWL_INVALID_STATION;
 166         unsigned long flags;
 167         DECLARE_MAC_BUF(mac);
 168
 169         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) ||
 170             (priv->iw_mode == IEEE80211_IF_TYPE_AP))
 171                 start = IWL_STA_ID;
 172
 173         if (is_broadcast_ether_addr(addr))
 174                 return IWL4965_BROADCAST_ID;
 175
 176         spin_lock_irqsave(&priv->sta_lock, flags);
 177         for (i = start; i < priv->hw_setting.max_stations; i++)
 178                 if ((priv->stations[i].used) &&
 179                     (!compare_ether_addr
 180                      (priv->stations[i].sta.sta.addr, addr))) {
 181                         ret = i;
 182                         goto out;
 183                 }
 184
 185         IWL_DEBUG_ASSOC_LIMIT("can not find STA %s total %d\n",
 186                         print_mac(mac, addr), priv->num_stations);
 187
 188  out:
 189         spin_unlock_irqrestore(&priv->sta_lock, flags);
 190         return ret;
 191 }
 192
 193 static int iwl4965_nic_set_pwr_src(struct iwl_priv *priv, int pwr_max)
 194 {
 195         int rc = 0;
 196         unsigned long flags;
 197
 198         spin_lock_irqsave(&priv->lock, flags);
 199         rc = iwl_grab_restricted_access(priv);
 200         if (rc) {
 201                 spin_unlock_irqrestore(&priv->lock, flags);
 202                 return rc;
 203         }
 204
 205         if (!pwr_max) {
 206                 u32 val;
 207
 208                 rc = pci_read_config_dword(priv->pci_dev, PCI_POWER_SOURCE,
 209                                            &val);
 210
 211                 if (val & PCI_CFG_PMC_PME_FROM_D3COLD_SUPPORT)
 212                         iwl_set_bits_mask_restricted_reg(
 213                                 priv, APMG_PS_CTRL_REG,
 214                                 APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
 215                                 ~APMG_PS_CTRL_MSK_PWR_SRC);
 216         } else
 217                 iwl_set_bits_mask_restricted_reg(
 218                         priv, APMG_PS_CTRL_REG,
 219                         APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
 220                         ~APMG_PS_CTRL_MSK_PWR_SRC);
 221
 222         iwl_release_restricted_access(priv);
 223         spin_unlock_irqrestore(&priv->lock, flags);
 224
 225         return rc;
 226 }
 227
 228 static int iwl4965_rx_init(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
 229 {
 230         int rc;
 231         unsigned long flags;
 232
 233         spin_lock_irqsave(&priv->lock, flags);
 234         rc = iwl_grab_restricted_access(priv);
 235         if (rc) {
 236                 spin_unlock_irqrestore(&priv->lock, flags);
 237                 return rc;
 238         }
 239
 240         /* stop HW */
 241         iwl_write_restricted(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0);
 242
 243         iwl_write_restricted(priv, FH_RSCSR_CHNL0_RBDCB_WPTR_REG, 0);
 244         iwl_write_restricted(priv, FH_RSCSR_CHNL0_RBDCB_BASE_REG,
 245                              rxq->dma_addr >> 8);
 246
 247         iwl_write_restricted(priv, FH_RSCSR_CHNL0_STTS_WPTR_REG,
 248                              (priv->hw_setting.shared_phys +
 249                               offsetof(struct iwl_shared, val0)) >> 4);
 250
 251         iwl_write_restricted(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG,
 252                              FH_RCSR_RX_CONFIG_CHNL_EN_ENABLE_VAL |
 253                              FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_INT_HOST_VAL |
 254                              IWL_FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K |
 255                              /*0x10 << 4 | */
 256                              (RX_QUEUE_SIZE_LOG <<
 257                               FH_RCSR_RX_CONFIG_RBDCB_SIZE_BITSHIFT));
 258
 259         /*
 260          * iwl_write32(priv,CSR_INT_COAL_REG,0);
 261          */
 262
 263         iwl_release_restricted_access(priv);
 264         spin_unlock_irqrestore(&priv->lock, flags);
 265
 266         return 0;
 267 }
 268
 269 static int iwl4965_kw_init(struct iwl_priv *priv)
 270 {
 271         unsigned long flags;
 272         int rc;
 273
 274         spin_lock_irqsave(&priv->lock, flags);
 275         rc = iwl_grab_restricted_access(priv);
 276         if (rc)
 277                 goto out;
 278
 279         iwl_write_restricted(priv, IWL_FH_KW_MEM_ADDR_REG,
 280                              priv->kw.dma_addr >> 4);
 281         iwl_release_restricted_access(priv);
 282 out:
 283         spin_unlock_irqrestore(&priv->lock, flags);
 284         return rc;
 285 }
 286
 287 static int iwl4965_kw_alloc(struct iwl_priv *priv)
 288 {
 289         struct pci_dev *dev = priv->pci_dev;
 290         struct iwl_kw *kw = &priv->kw;
 291
 292         kw->size = IWL4965_KW_SIZE;     /* TBW need set somewhere else */
 293         kw->v_addr = pci_alloc_consistent(dev, kw->size, &kw->dma_addr);
 294         if (!kw->v_addr)
 295                 return -ENOMEM;
 296
 297         return 0;
 298 }
 299
 300 #define CHECK_AND_PRINT(x) ((eeprom_ch->flags & EEPROM_CHANNEL_##x) \
 301                             ? # x " " : "")
 302
 303 int iwl4965_set_fat_chan_info(struct iwl_priv *priv, int phymode, u16 channel,
 304                               const struct iwl_eeprom_channel *eeprom_ch,
 305                               u8 fat_extension_channel)
 306 {
 307         struct iwl_channel_info *ch_info;
 308
 309         ch_info = (struct iwl_channel_info *)
 310                         iwl_get_channel_info(priv, phymode, channel);
 311
 312         if (!is_channel_valid(ch_info))
 313                 return -1;
 314
 315         IWL_DEBUG_INFO("FAT Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x"
 316                         " %ddBm): Ad-Hoc %ssupported\n",
 317                         ch_info->channel,
 318                         is_channel_a_band(ch_info) ?
 319                         "5.2" : "2.4",
 320                         CHECK_AND_PRINT(IBSS),
 321                         CHECK_AND_PRINT(ACTIVE),
 322                         CHECK_AND_PRINT(RADAR),
 323                         CHECK_AND_PRINT(WIDE),
 324                         CHECK_AND_PRINT(NARROW),
 325                         CHECK_AND_PRINT(DFS),
 326                         eeprom_ch->flags,
 327                         eeprom_ch->max_power_avg,
 328                         ((eeprom_ch->flags & EEPROM_CHANNEL_IBSS)
 329                          && !(eeprom_ch->flags & EEPROM_CHANNEL_RADAR)) ?
 330                         "" : "not ");
 331
 332         ch_info->fat_eeprom = *eeprom_ch;
 333         ch_info->fat_max_power_avg = eeprom_ch->max_power_avg;
 334         ch_info->fat_curr_txpow = eeprom_ch->max_power_avg;
 335         ch_info->fat_min_power = 0;
 336         ch_info->fat_scan_power = eeprom_ch->max_power_avg;
 337         ch_info->fat_flags = eeprom_ch->flags;
 338         ch_info->fat_extension_channel = fat_extension_channel;
 339
 340         return 0;
 341 }
 342
 343 static void iwl4965_kw_free(struct iwl_priv *priv)
 344 {
 345         struct pci_dev *dev = priv->pci_dev;
 346         struct iwl_kw *kw = &priv->kw;
 347
 348         if (kw->v_addr) {
 349                 pci_free_consistent(dev, kw->size, kw->v_addr, kw->dma_addr);
 350                 memset(kw, 0, sizeof(*kw));
 351         }
 352 }
 353
 354 /**
 355  * iwl4965_txq_ctx_reset - Reset TX queue context
 356  * Destroys all DMA structures and initialise them again
 357  *
 358  * @param priv
 359  * @return error code
 360  */
 361 static int iwl4965_txq_ctx_reset(struct iwl_priv *priv)
 362 {
 363         int rc = 0;
 364         int txq_id, slots_num;
 365         unsigned long flags;
 366
 367         iwl4965_kw_free(priv);
 368
 369         iwl_hw_txq_ctx_free(priv);
 370
 371         /* Tx CMD queue */
 372         rc = iwl4965_kw_alloc(priv);
 373         if (rc) {
 374                 IWL_ERROR("Keep Warm allocation failed");
 375                 goto error_kw;
 376         }
 377
 378         spin_lock_irqsave(&priv->lock, flags);
 379
 380         rc = iwl_grab_restricted_access(priv);
 381         if (unlikely(rc)) {
 382                 IWL_ERROR("TX reset failed");
 383                 spin_unlock_irqrestore(&priv->lock, flags);
 384                 goto error_reset;
 385         }
 386
 387         iwl_write_restricted_reg(priv, SCD_TXFACT, 0);
 388         iwl_release_restricted_access(priv);
 389         spin_unlock_irqrestore(&priv->lock, flags);
 390
 391         rc = iwl4965_kw_init(priv);
 392         if (rc) {
 393                 IWL_ERROR("kw_init failed\n");
 394                 goto error_reset;
 395         }
 396
 397         /* Tx queue(s) */
 398         for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++) {
 399                 slots_num = (txq_id == IWL_CMD_QUEUE_NUM) ?
 400                                         TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS;
 401                 rc = iwl_tx_queue_init(priv, &priv->txq[txq_id], slots_num,
 402                                        txq_id);
 403                 if (rc) {
 404                         IWL_ERROR("Tx %d queue init failed\n", txq_id);
 405                         goto error;
 406                 }
 407         }
 408
 409         return rc;
 410
 411  error:
 412         iwl_hw_txq_ctx_free(priv);
 413  error_reset:
 414         iwl4965_kw_free(priv);
 415  error_kw:
 416         return rc;
 417 }
 418
 419 int iwl_hw_nic_init(struct iwl_priv *priv)
 420 {
 421         int rc;
 422         unsigned long flags;
 423         struct iwl_rx_queue *rxq = &priv->rxq;
 424         u8 rev_id;
 425         u32 val;
 426         u8 val_link;
 427
 428         iwl_power_init_handle(priv);
 429
 430         /* nic_init */
 431         spin_lock_irqsave(&priv->lock, flags);
 432
 433         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
 434                     CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
 435
 436         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 437         rc = iwl_poll_bit(priv, CSR_GP_CNTRL,
 438                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
 439                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
 440         if (rc < 0) {
 441                 spin_unlock_irqrestore(&priv->lock, flags);
 442                 IWL_DEBUG_INFO("Failed to init the card\n");
 443                 return rc;
 444         }
 445
 446         rc = iwl_grab_restricted_access(priv);
 447         if (rc) {
 448                 spin_unlock_irqrestore(&priv->lock, flags);
 449                 return rc;
 450         }
 451
 452         iwl_read_restricted_reg(priv, APMG_CLK_CTRL_REG);
 453
 454         iwl_write_restricted_reg(priv, APMG_CLK_CTRL_REG,
 455                                  APMG_CLK_VAL_DMA_CLK_RQT |
 456                                  APMG_CLK_VAL_BSM_CLK_RQT);
 457         iwl_read_restricted_reg(priv, APMG_CLK_CTRL_REG);
 458
 459         udelay(20);
 460
 461         iwl_set_bits_restricted_reg(priv, APMG_PCIDEV_STT_REG,
 462                                     APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
 463
 464         iwl_release_restricted_access(priv);
 465         iwl_write32(priv, CSR_INT_COALESCING, 512 / 32);
 466         spin_unlock_irqrestore(&priv->lock, flags);
 467
 468         /* Determine HW type */
 469         rc = pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &rev_id);
 470         if (rc)
 471                 return rc;
 472
 473         IWL_DEBUG_INFO("HW Revision ID = 0x%X\n", rev_id);
 474
 475         iwl4965_nic_set_pwr_src(priv, 1);
 476         spin_lock_irqsave(&priv->lock, flags);
 477
 478         if ((rev_id & 0x80) == 0x80 && (rev_id & 0x7f) < 8) {
 479                 pci_read_config_dword(priv->pci_dev, PCI_REG_WUM8, &val);
 480                 /* Enable No Snoop field */
 481                 pci_write_config_dword(priv->pci_dev, PCI_REG_WUM8,
 482                                        val & ~(1 << 11));
 483         }
 484
 485         spin_unlock_irqrestore(&priv->lock, flags);
 486
 487         /* Read the EEPROM */
 488         rc = iwl_eeprom_init(priv);
 489         if (rc)
 490                 return rc;
 491
 492         if (priv->eeprom.calib_version < EEPROM_TX_POWER_VERSION_NEW) {
 493                 IWL_ERROR("Older EEPROM detected!  Aborting.\n");
 494                 return -EINVAL;
 495         }
 496
 497         pci_read_config_byte(priv->pci_dev, PCI_LINK_CTRL, &val_link);
 498
 499         /* disable L1 entry -- workaround for pre-B1 */
 500         pci_write_config_byte(priv->pci_dev, PCI_LINK_CTRL, val_link & ~0x02);
 501
 502         spin_lock_irqsave(&priv->lock, flags);
 503
 504         /* set CSR_HW_CONFIG_REG for uCode use */
 505
 506         iwl_set_bit(priv, CSR_SW_VER, CSR_HW_IF_CONFIG_REG_BIT_KEDRON_R |
 507                     CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
 508                     CSR_HW_IF_CONFIG_REG_BIT_MAC_SI);
 509
 510         rc = iwl_grab_restricted_access(priv);
 511         if (rc < 0) {
 512                 spin_unlock_irqrestore(&priv->lock, flags);
 513                 IWL_DEBUG_INFO("Failed to init the card\n");
 514                 return rc;
 515         }
 516
 517         iwl_read_restricted_reg(priv, APMG_PS_CTRL_REG);
 518         iwl_set_bits_restricted_reg(priv, APMG_PS_CTRL_REG,
 519                                     APMG_PS_CTRL_VAL_RESET_REQ);
 520         udelay(5);
 521         iwl_clear_bits_restricted_reg(priv, APMG_PS_CTRL_REG,
 522                                       APMG_PS_CTRL_VAL_RESET_REQ);
 523
 524         iwl_release_restricted_access(priv);
 525         spin_unlock_irqrestore(&priv->lock, flags);
 526
 527         iwl_hw_card_show_info(priv);
 528
 529         /* end nic_init */
 530
 531         /* Allocate the RX queue, or reset if it is already allocated */
 532         if (!rxq->bd) {
 533                 rc = iwl_rx_queue_alloc(priv);
 534                 if (rc) {
 535                         IWL_ERROR("Unable to initialize Rx queue\n");
 536                         return -ENOMEM;
 537                 }
 538         } else
 539                 iwl_rx_queue_reset(priv, rxq);
 540
 541         iwl_rx_replenish(priv);
 542
 543         iwl4965_rx_init(priv, rxq);
 544
 545         spin_lock_irqsave(&priv->lock, flags);
 546
 547         rxq->need_update = 1;
 548         iwl_rx_queue_update_write_ptr(priv, rxq);
 549
 550         spin_unlock_irqrestore(&priv->lock, flags);
 551         rc = iwl4965_txq_ctx_reset(priv);
 552         if (rc)
 553                 return rc;
 554
 555         if (priv->eeprom.sku_cap & EEPROM_SKU_CAP_SW_RF_KILL_ENABLE)
 556                 IWL_DEBUG_RF_KILL("SW RF KILL supported in EEPROM.\n");
 557
 558         if (priv->eeprom.sku_cap & EEPROM_SKU_CAP_HW_RF_KILL_ENABLE)
 559                 IWL_DEBUG_RF_KILL("HW RF KILL supported in EEPROM.\n");
 560
 561         set_bit(STATUS_INIT, &priv->status);
 562
 563         return 0;
 564 }
 565
 566 int iwl_hw_nic_stop_master(struct iwl_priv *priv)
 567 {
 568         int rc = 0;
 569         u32 reg_val;
 570         unsigned long flags;
 571
 572         spin_lock_irqsave(&priv->lock, flags);
 573
 574         /* set stop master bit */
 575         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
 576
 577         reg_val = iwl_read32(priv, CSR_GP_CNTRL);
 578
 579         if (CSR_GP_CNTRL_REG_FLAG_MAC_POWER_SAVE ==
 580             (reg_val & CSR_GP_CNTRL_REG_MSK_POWER_SAVE_TYPE))
 581                 IWL_DEBUG_INFO("Card in power save, master is already "
 582                                "stopped\n");
 583         else {
 584                 rc = iwl_poll_bit(priv, CSR_RESET,
 585                                   CSR_RESET_REG_FLAG_MASTER_DISABLED,
 586                                   CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
 587                 if (rc < 0) {
 588                         spin_unlock_irqrestore(&priv->lock, flags);
 589                         return rc;
 590                 }
 591         }
 592
 593         spin_unlock_irqrestore(&priv->lock, flags);
 594         IWL_DEBUG_INFO("stop master\n");
 595
 596         return rc;
 597 }
 598
 599 void iwl_hw_txq_ctx_stop(struct iwl_priv *priv)
 600 {
 601
 602         int txq_id;
 603         unsigned long flags;
 604
 605         /* reset TFD queues */
 606         for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++) {
 607                 spin_lock_irqsave(&priv->lock, flags);
 608                 if (iwl_grab_restricted_access(priv)) {
 609                         spin_unlock_irqrestore(&priv->lock, flags);
 610                         continue;
 611                 }
 612
 613                 iwl_write_restricted(priv,
 614                                      IWL_FH_TCSR_CHNL_TX_CONFIG_REG(txq_id),
 615                                      0x0);
 616                 iwl_poll_restricted_bit(priv, IWL_FH_TSSR_TX_STATUS_REG,
 617                                         IWL_FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE
 618                                         (txq_id), 200);
 619                 iwl_release_restricted_access(priv);
 620                 spin_unlock_irqrestore(&priv->lock, flags);
 621         }
 622
 623         iwl_hw_txq_ctx_free(priv);
 624 }
 625
 626 int iwl_hw_nic_reset(struct iwl_priv *priv)
 627 {
 628         int rc = 0;
 629         unsigned long flags;
 630
 631         iwl_hw_nic_stop_master(priv);
 632
 633         spin_lock_irqsave(&priv->lock, flags);
 634
 635         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
 636
 637         udelay(10);
 638
 639         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 640         rc = iwl_poll_bit(priv, CSR_RESET,
 641                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
 642                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25);
 643
 644         udelay(10);
 645
 646         rc = iwl_grab_restricted_access(priv);
 647         if (!rc) {
 648                 iwl_write_restricted_reg(priv, APMG_CLK_EN_REG,
 649                                          APMG_CLK_VAL_DMA_CLK_RQT |
 650                                          APMG_CLK_VAL_BSM_CLK_RQT);
 651
 652                 udelay(10);
 653
 654                 iwl_set_bits_restricted_reg(priv, APMG_PCIDEV_STT_REG,
 655                                 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
 656
 657                 iwl_release_restricted_access(priv);
 658         }
 659
 660         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
 661         wake_up_interruptible(&priv->wait_command_queue);
 662
 663         spin_unlock_irqrestore(&priv->lock, flags);
 664
 665         return rc;
 666
 667 }
 668
 669 #define REG_RECALIB_PERIOD (60)
 670
 671 /**
 672  * iwl4965_bg_statistics_periodic - Timer callback to queue statistics
 673  *
 674  * This callback is provided in order to queue the statistics_work
 675  * in work_queue context (v. softirq)
 676  *
 677  * This timer function is continually reset to execute within
 678  * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
 679  * was received.  We need to ensure we receive the statistics in order
 680  * to update the temperature used for calibrating the TXPOWER.  However,
 681  * we can't send the statistics command from softirq context (which
 682  * is the context which timers run at) so we have to queue off the
 683  * statistics_work to actually send the command to the hardware.
 684  */
 685 static void iwl4965_bg_statistics_periodic(unsigned long data)
 686 {
 687         struct iwl_priv *priv = (struct iwl_priv *)data;
 688
 689         queue_work(priv->workqueue, &priv->statistics_work);
 690 }
 691
 692 /**
 693  * iwl4965_bg_statistics_work - Send the statistics request to the hardware.
 694  *
 695  * This is queued by iwl_bg_statistics_periodic.
 696  */
 697 static void iwl4965_bg_statistics_work(struct work_struct *work)
 698 {
 699         struct iwl_priv *priv = container_of(work, struct iwl_priv,
 700                                              statistics_work);
 701
 702         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 703                 return;
 704
 705         mutex_lock(&priv->mutex);
 706         iwl_send_statistics_request(priv);
 707         mutex_unlock(&priv->mutex);
 708 }
 709
 710 #define CT_LIMIT_CONST          259
 711 #define TM_CT_KILL_THRESHOLD    110
 712
 713 void iwl4965_rf_kill_ct_config(struct iwl_priv *priv)
 714 {
 715         struct iwl_ct_kill_config cmd;
 716         u32 R1, R2, R3;
 717         u32 temp_th;
 718         u32 crit_temperature;
 719         unsigned long flags;
 720         int rc = 0;
 721
 722         spin_lock_irqsave(&priv->lock, flags);
 723         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
 724                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
 725         spin_unlock_irqrestore(&priv->lock, flags);
 726
 727         if (priv->statistics.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK) {
 728                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[1]);
 729                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[1]);
 730                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[1]);
 731         } else {
 732                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[0]);
 733                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[0]);
 734                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[0]);
 735         }
 736
 737         temp_th = CELSIUS_TO_KELVIN(TM_CT_KILL_THRESHOLD);
 738
 739         crit_temperature = ((temp_th * (R3-R1))/CT_LIMIT_CONST) + R2;
 740         cmd.critical_temperature_R =  cpu_to_le32(crit_temperature);
 741         rc = iwl_send_cmd_pdu(priv,
 742                               REPLY_CT_KILL_CONFIG_CMD, sizeof(cmd), &cmd);
 743         if (rc)
 744                 IWL_ERROR("REPLY_CT_KILL_CONFIG_CMD failed\n");
 745         else
 746                 IWL_DEBUG_INFO("REPLY_CT_KILL_CONFIG_CMD succeeded\n");
 747 }
 748
 749 #ifdef CONFIG_IWLWIFI_SENSITIVITY
 750
 751 /* "false alarms" are signals that our DSP tries to lock onto,
 752  *   but then determines that they are either noise, or transmissions
 753  *   from a distant wireless network (also "noise", really) that get
 754  *   "stepped on" by stronger transmissions within our own network.
 755  * This algorithm attempts to set a sensitivity level that is high
 756  *   enough to receive all of our own network traffic, but not so
 757  *   high that our DSP gets too busy trying to lock onto non-network
 758  *   activity/noise. */
 759 static int iwl4965_sens_energy_cck(struct iwl_priv *priv,
 760                                    u32 norm_fa,
 761                                    u32 rx_enable_time,
 762                                    struct statistics_general_data *rx_info)
 763 {
 764         u32 max_nrg_cck = 0;
 765         int i = 0;
 766         u8 max_silence_rssi = 0;
 767         u32 silence_ref = 0;
 768         u8 silence_rssi_a = 0;
 769         u8 silence_rssi_b = 0;
 770         u8 silence_rssi_c = 0;
 771         u32 val;
 772
 773         /* "false_alarms" values below are cross-multiplications to assess the
 774          *   numbers of false alarms within the measured period of actual Rx
 775          *   (Rx is off when we're txing), vs the min/max expected false alarms
 776          *   (some should be expected if rx is sensitive enough) in a
 777          *   hypothetical listening period of 200 time units (TU), 204.8 msec:
 778          *
 779          * MIN_FA/fixed-time < false_alarms/actual-rx-time < MAX_FA/beacon-time
 780          *
 781          * */
 782         u32 false_alarms = norm_fa * 200 * 1024;
 783         u32 max_false_alarms = MAX_FA_CCK * rx_enable_time;
 784         u32 min_false_alarms = MIN_FA_CCK * rx_enable_time;
 785         struct iwl_sensitivity_data *data = NULL;
 786
 787         data = &(priv->sensitivity_data);
 788
 789         data->nrg_auto_corr_silence_diff = 0;
 790
 791         /* Find max silence rssi among all 3 receivers.
 792          * This is background noise, which may include transmissions from other
 793          *    networks, measured during silence before our network's beacon */
 794         silence_rssi_a = (u8)((rx_info->beacon_silence_rssi_a &
 795                             ALL_BAND_FILTER)>>8);
 796         silence_rssi_b = (u8)((rx_info->beacon_silence_rssi_b &
 797                             ALL_BAND_FILTER)>>8);
 798         silence_rssi_c = (u8)((rx_info->beacon_silence_rssi_c &
 799                             ALL_BAND_FILTER)>>8);
 800
 801         val = max(silence_rssi_b, silence_rssi_c);
 802         max_silence_rssi = max(silence_rssi_a, (u8) val);
 803
 804         /* Store silence rssi in 20-beacon history table */
 805         data->nrg_silence_rssi[data->nrg_silence_idx] = max_silence_rssi;
 806         data->nrg_silence_idx++;
 807         if (data->nrg_silence_idx >= NRG_NUM_PREV_STAT_L)
 808                 data->nrg_silence_idx = 0;
 809
 810         /* Find max silence rssi across 20 beacon history */
 811         for (i = 0; i < NRG_NUM_PREV_STAT_L; i++) {
 812                 val = data->nrg_silence_rssi[i];
 813                 silence_ref = max(silence_ref, val);
 814         }
 815         IWL_DEBUG_CALIB("silence a %u, b %u, c %u, 20-bcn max %u\n",
 816                         silence_rssi_a, silence_rssi_b, silence_rssi_c,
 817                         silence_ref);
 818
 819         /* Find max rx energy (min value!) among all 3 receivers,
 820          *   measured during beacon frame.
 821          * Save it in 10-beacon history table. */
 822         i = data->nrg_energy_idx;
 823         val = min(rx_info->beacon_energy_b, rx_info->beacon_energy_c);
 824         data->nrg_value[i] = min(rx_info->beacon_energy_a, val);
 825
 826         data->nrg_energy_idx++;
 827         if (data->nrg_energy_idx >= 10)
 828                 data->nrg_energy_idx = 0;
 829
 830         /* Find min rx energy (max value) across 10 beacon history.
 831          * This is the minimum signal level that we want to receive well.
 832          * Add backoff (margin so we don't miss slightly lower energy frames).
 833          * This establishes an upper bound (min value) for energy threshold. */
 834         max_nrg_cck = data->nrg_value[0];
 835         for (i = 1; i < 10; i++)
 836                 max_nrg_cck = (u32) max(max_nrg_cck, (data->nrg_value[i]));
 837         max_nrg_cck += 6;
 838
 839         IWL_DEBUG_CALIB("rx energy a %u, b %u, c %u, 10-bcn max/min %u\n",
 840                         rx_info->beacon_energy_a, rx_info->beacon_energy_b,
 841                         rx_info->beacon_energy_c, max_nrg_cck - 6);
 842
 843         /* Count number of consecutive beacons with fewer-than-desired
 844          *   false alarms. */
 845         if (false_alarms < min_false_alarms)
 846                 data->num_in_cck_no_fa++;
 847         else
 848                 data->num_in_cck_no_fa = 0;
 849         IWL_DEBUG_CALIB("consecutive bcns with few false alarms = %u\n",
 850                         data->num_in_cck_no_fa);
 851
 852         /* If we got too many false alarms this time, reduce sensitivity */
 853         if (false_alarms > max_false_alarms) {
 854                 IWL_DEBUG_CALIB("norm FA %u > max FA %u\n",
 855                              false_alarms, max_false_alarms);
 856                 IWL_DEBUG_CALIB("... reducing sensitivity\n");
 857                 data->nrg_curr_state = IWL_FA_TOO_MANY;
 858
 859                 if (data->auto_corr_cck > AUTO_CORR_MAX_TH_CCK) {
 860                         /* Store for "fewer than desired" on later beacon */
 861                         data->nrg_silence_ref = silence_ref;
 862
 863                         /* increase energy threshold (reduce nrg value)
 864                          *   to decrease sensitivity */
 865                         if (data->nrg_th_cck > (NRG_MAX_CCK + NRG_STEP_CCK))
 866                                 data->nrg_th_cck = data->nrg_th_cck
 867                                                          - NRG_STEP_CCK;
 868                 }
 869
 870                 /* increase auto_corr values to decrease sensitivity */
 871                 if (data->auto_corr_cck < AUTO_CORR_MAX_TH_CCK)
 872                         data->auto_corr_cck = AUTO_CORR_MAX_TH_CCK + 1;
 873                 else {
 874                         val = data->auto_corr_cck + AUTO_CORR_STEP_CCK;
 875                         data->auto_corr_cck = min((u32)AUTO_CORR_MAX_CCK, val);
 876                 }
 877                 val = data->auto_corr_cck_mrc + AUTO_CORR_STEP_CCK;
 878                 data->auto_corr_cck_mrc = min((u32)AUTO_CORR_MAX_CCK_MRC, val);
 879
 880         /* Else if we got fewer than desired, increase sensitivity */
 881         } else if (false_alarms < min_false_alarms) {
 882                 data->nrg_curr_state = IWL_FA_TOO_FEW;
 883
 884                 /* Compare silence level with silence level for most recent
 885                  *   healthy number or too many false alarms */
 886                 data->nrg_auto_corr_silence_diff = (s32)data->nrg_silence_ref -
 887                                                    (s32)silence_ref;
 888
 889                 IWL_DEBUG_CALIB("norm FA %u < min FA %u, silence diff %d\n",
 890                          false_alarms, min_false_alarms,
 891                          data->nrg_auto_corr_silence_diff);
 892
 893                 /* Increase value to increase sensitivity, but only if:
 894                  * 1a) previous beacon did *not* have *too many* false alarms
 895                  * 1b) AND there's a significant difference in Rx levels
 896                  *      from a previous beacon with too many, or healthy # FAs
 897                  * OR 2) We've seen a lot of beacons (100) with too few
 898                  *       false alarms */
 899                 if ((data->nrg_prev_state != IWL_FA_TOO_MANY) &&
 900                         ((data->nrg_auto_corr_silence_diff > NRG_DIFF) ||
 901                         (data->num_in_cck_no_fa > MAX_NUMBER_CCK_NO_FA))) {
 902
 903                         IWL_DEBUG_CALIB("... increasing sensitivity\n");
 904                         /* Increase nrg value to increase sensitivity */
 905                         val = data->nrg_th_cck + NRG_STEP_CCK;
 906                         data->nrg_th_cck = min((u32)NRG_MIN_CCK, val);
 907
 908                         /* Decrease auto_corr values to increase sensitivity */
 909                         val = data->auto_corr_cck - AUTO_CORR_STEP_CCK;
 910                         data->auto_corr_cck = max((u32)AUTO_CORR_MIN_CCK, val);
 911
 912                         val = data->auto_corr_cck_mrc - AUTO_CORR_STEP_CCK;
 913                         data->auto_corr_cck_mrc =
 914                                          max((u32)AUTO_CORR_MIN_CCK_MRC, val);
 915
 916                 } else
 917                         IWL_DEBUG_CALIB("... but not changing sensitivity\n");
 918
 919         /* Else we got a healthy number of false alarms, keep status quo */
 920         } else {
 921                 IWL_DEBUG_CALIB(" FA in safe zone\n");
 922                 data->nrg_curr_state = IWL_FA_GOOD_RANGE;
 923
 924                 /* Store for use in "fewer than desired" with later beacon */
 925                 data->nrg_silence_ref = silence_ref;
 926
 927                 /* If previous beacon had too many false alarms,
 928                  *   give it some extra margin by reducing sensitivity again
 929                  *   (but don't go below measured energy of desired Rx) */
 930                 if (IWL_FA_TOO_MANY == data->nrg_prev_state) {
 931                         IWL_DEBUG_CALIB("... increasing margin\n");
 932                         data->nrg_th_cck -= NRG_MARGIN;
 933                 }
 934         }
 935
 936         /* Make sure the energy threshold does not go above the measured
 937          * energy of the desired Rx signals (reduced by backoff margin),
 938          * or else we might start missing Rx frames.
 939          * Lower value is higher energy, so we use max()!
 940          */
 941         data->nrg_th_cck = max(max_nrg_cck, data->nrg_th_cck);
 942         IWL_DEBUG_CALIB("new nrg_th_cck %u\n", data->nrg_th_cck);
 943
 944         data->nrg_prev_state = data->nrg_curr_state;
 945
 946         return 0;
 947 }
 948
 949
 950 static int iwl4965_sens_auto_corr_ofdm(struct iwl_priv *priv,
 951                                        u32 norm_fa,
 952                                        u32 rx_enable_time)
 953 {
 954         u32 val;
 955         u32 false_alarms = norm_fa * 200 * 1024;
 956         u32 max_false_alarms = MAX_FA_OFDM * rx_enable_time;
 957         u32 min_false_alarms = MIN_FA_OFDM * rx_enable_time;
 958         struct iwl_sensitivity_data *data = NULL;
 959
 960         data = &(priv->sensitivity_data);
 961
 962         /* If we got too many false alarms this time, reduce sensitivity */
 963         if (false_alarms > max_false_alarms) {
 964
 965                 IWL_DEBUG_CALIB("norm FA %u > max FA %u)\n",
 966                              false_alarms, max_false_alarms);
 967
 968                 val = data->auto_corr_ofdm + AUTO_CORR_STEP_OFDM;
 969                 data->auto_corr_ofdm =
 970                                 min((u32)AUTO_CORR_MAX_OFDM, val);
 971
 972                 val = data->auto_corr_ofdm_mrc + AUTO_CORR_STEP_OFDM;
 973                 data->auto_corr_ofdm_mrc =
 974                                 min((u32)AUTO_CORR_MAX_OFDM_MRC, val);
 975
 976                 val = data->auto_corr_ofdm_x1 + AUTO_CORR_STEP_OFDM;
 977                 data->auto_corr_ofdm_x1 =
 978                                 min((u32)AUTO_CORR_MAX_OFDM_X1, val);
 979
 980                 val = data->auto_corr_ofdm_mrc_x1 + AUTO_CORR_STEP_OFDM;
 981                 data->auto_corr_ofdm_mrc_x1 =
 982                                 min((u32)AUTO_CORR_MAX_OFDM_MRC_X1, val);
 983         }
 984
 985         /* Else if we got fewer than desired, increase sensitivity */
 986         else if (false_alarms < min_false_alarms) {
 987
 988                 IWL_DEBUG_CALIB("norm FA %u < min FA %u\n",
 989                              false_alarms, min_false_alarms);
 990
 991                 val = data->auto_corr_ofdm - AUTO_CORR_STEP_OFDM;
 992                 data->auto_corr_ofdm =
 993                                 max((u32)AUTO_CORR_MIN_OFDM, val);
 994
 995                 val = data->auto_corr_ofdm_mrc - AUTO_CORR_STEP_OFDM;
 996                 data->auto_corr_ofdm_mrc =
 997                                 max((u32)AUTO_CORR_MIN_OFDM_MRC, val);
 998
 999                 val = data->auto_corr_ofdm_x1 - AUTO_CORR_STEP_OFDM;
1000                 data->auto_corr_ofdm_x1 =
1001                                 max((u32)AUTO_CORR_MIN_OFDM_X1, val);
1002
1003                 val = data->auto_corr_ofdm_mrc_x1 - AUTO_CORR_STEP_OFDM;
1004                 data->auto_corr_ofdm_mrc_x1 =
1005                                 max((u32)AUTO_CORR_MIN_OFDM_MRC_X1, val);
1006         }
1007
1008         else
1009                 IWL_DEBUG_CALIB("min FA %u < norm FA %u < max FA %u OK\n",
1010                          min_false_alarms, false_alarms, max_false_alarms);
1011
1012         return 0;
1013 }
1014
1015 static int iwl_sensitivity_callback(struct iwl_priv *priv,
1016                                     struct iwl_cmd *cmd, struct sk_buff *skb)
1017 {
1018         /* We didn't cache the SKB; let the caller free it */
1019         return 1;
1020 }
1021
1022 /* Prepare a SENSITIVITY_CMD, send to uCode if values have changed */
1023 static int iwl4965_sensitivity_write(struct iwl_priv *priv, u8 flags)
1024 {
1025         int rc = 0;
1026         struct iwl_sensitivity_cmd cmd ;
1027         struct iwl_sensitivity_data *data = NULL;
1028         struct iwl_host_cmd cmd_out = {
1029                 .id = SENSITIVITY_CMD,
1030                 .len = sizeof(struct iwl_sensitivity_cmd),
1031                 .meta.flags = flags,
1032                 .data = &cmd,
1033         };
1034
1035         data = &(priv->sensitivity_data);
1036
1037         memset(&cmd, 0, sizeof(cmd));
1038
1039         cmd.table[HD_AUTO_CORR32_X4_TH_ADD_MIN_INDEX] =
1040                                 cpu_to_le16((u16)data->auto_corr_ofdm);
1041         cmd.table[HD_AUTO_CORR32_X4_TH_ADD_MIN_MRC_INDEX] =
1042                                 cpu_to_le16((u16)data->auto_corr_ofdm_mrc);
1043         cmd.table[HD_AUTO_CORR32_X1_TH_ADD_MIN_INDEX] =
1044                                 cpu_to_le16((u16)data->auto_corr_ofdm_x1);
1045         cmd.table[HD_AUTO_CORR32_X1_TH_ADD_MIN_MRC_INDEX] =
1046                                 cpu_to_le16((u16)data->auto_corr_ofdm_mrc_x1);
1047
1048         cmd.table[HD_AUTO_CORR40_X4_TH_ADD_MIN_INDEX] =
1049                                 cpu_to_le16((u16)data->auto_corr_cck);
1050         cmd.table[HD_AUTO_CORR40_X4_TH_ADD_MIN_MRC_INDEX] =
1051                                 cpu_to_le16((u16)data->auto_corr_cck_mrc);
1052
1053         cmd.table[HD_MIN_ENERGY_CCK_DET_INDEX] =
1054                                 cpu_to_le16((u16)data->nrg_th_cck);
1055         cmd.table[HD_MIN_ENERGY_OFDM_DET_INDEX] =
1056                                 cpu_to_le16((u16)data->nrg_th_ofdm);
1057
1058         cmd.table[HD_BARKER_CORR_TH_ADD_MIN_INDEX] =
1059                                 __constant_cpu_to_le16(190);
1060         cmd.table[HD_BARKER_CORR_TH_ADD_MIN_MRC_INDEX] =
1061                                 __constant_cpu_to_le16(390);
1062         cmd.table[HD_OFDM_ENERGY_TH_IN_INDEX] =
1063                                 __constant_cpu_to_le16(62);
1064
1065         IWL_DEBUG_CALIB("ofdm: ac %u mrc %u x1 %u mrc_x1 %u thresh %u\n",
1066                         data->auto_corr_ofdm, data->auto_corr_ofdm_mrc,
1067                         data->auto_corr_ofdm_x1, data->auto_corr_ofdm_mrc_x1,
1068                         data->nrg_th_ofdm);
1069
1070         IWL_DEBUG_CALIB("cck: ac %u mrc %u thresh %u\n",
1071                         data->auto_corr_cck, data->auto_corr_cck_mrc,
1072                         data->nrg_th_cck);
1073
1074         cmd.control = SENSITIVITY_CMD_CONTROL_WORK_TABLE;
1075
1076         if (flags & CMD_ASYNC)
1077                 cmd_out.meta.u.callback = iwl_sensitivity_callback;
1078
1079         /* Don't send command to uCode if nothing has changed */
1080         if (!memcmp(&cmd.table[0], &(priv->sensitivity_tbl[0]),
1081                     sizeof(u16)*HD_TABLE_SIZE)) {
1082                 IWL_DEBUG_CALIB("No change in SENSITIVITY_CMD\n");
1083                 return 0;
1084         }
1085
1086         /* Copy table for comparison next time */
1087         memcpy(&(priv->sensitivity_tbl[0]), &(cmd.table[0]),
1088                sizeof(u16)*HD_TABLE_SIZE);
1089
1090         rc = iwl_send_cmd(priv, &cmd_out);
1091         if (!rc) {
1092                 IWL_DEBUG_CALIB("SENSITIVITY_CMD succeeded\n");
1093                 return rc;
1094         }
1095
1096         return 0;
1097 }
1098
1099 void iwl4965_init_sensitivity(struct iwl_priv *priv, u8 flags, u8 force)
1100 {
1101         int rc = 0;
1102         int i;
1103         struct iwl_sensitivity_data *data = NULL;
1104
1105         IWL_DEBUG_CALIB("Start iwl4965_init_sensitivity\n");
1106
1107         if (force)
1108                 memset(&(priv->sensitivity_tbl[0]), 0,
1109                         sizeof(u16)*HD_TABLE_SIZE);
1110
1111         /* Clear driver's sensitivity algo data */
1112         data = &(priv->sensitivity_data);
1113         memset(data, 0, sizeof(struct iwl_sensitivity_data));
1114
1115         data->num_in_cck_no_fa = 0;
1116         data->nrg_curr_state = IWL_FA_TOO_MANY;
1117         data->nrg_prev_state = IWL_FA_TOO_MANY;
1118         data->nrg_silence_ref = 0;
1119         data->nrg_silence_idx = 0;
1120         data->nrg_energy_idx = 0;
1121
1122         for (i = 0; i < 10; i++)
1123                 data->nrg_value[i] = 0;
1124
1125         for (i = 0; i < NRG_NUM_PREV_STAT_L; i++)
1126                 data->nrg_silence_rssi[i] = 0;
1127
1128         data->auto_corr_ofdm = 90;
1129         data->auto_corr_ofdm_mrc = 170;
1130         data->auto_corr_ofdm_x1  = 105;
1131         data->auto_corr_ofdm_mrc_x1 = 220;
1132         data->auto_corr_cck = AUTO_CORR_CCK_MIN_VAL_DEF;
1133         data->auto_corr_cck_mrc = 200;
1134         data->nrg_th_cck = 100;
1135         data->nrg_th_ofdm = 100;
1136
1137         data->last_bad_plcp_cnt_ofdm = 0;
1138         data->last_fa_cnt_ofdm = 0;
1139         data->last_bad_plcp_cnt_cck = 0;
1140         data->last_fa_cnt_cck = 0;
1141
1142         /* Clear prior Sensitivity command data to force send to uCode */
1143         if (force)
1144                 memset(&(priv->sensitivity_tbl[0]), 0,
1145                     sizeof(u16)*HD_TABLE_SIZE);
1146
1147         rc |= iwl4965_sensitivity_write(priv, flags);
1148         IWL_DEBUG_CALIB("<<return 0x%X\n", rc);
1149
1150         return;
1151 }
1152
1153
1154 /* Reset differential Rx gains in NIC to prepare for chain noise calibration.
1155  * Called after every association, but this runs only once!
1156  *  ... once chain noise is calibrated the first time, it's good forever.  */
1157 void iwl4965_chain_noise_reset(struct iwl_priv *priv)
1158 {
1159         struct iwl_chain_noise_data *data = NULL;
1160         int rc = 0;
1161
1162         data = &(priv->chain_noise_data);
1163         if ((data->state == IWL_CHAIN_NOISE_ALIVE) && iwl_is_associated(priv)) {
1164                 struct iwl_calibration_cmd cmd;
1165
1166                 memset(&cmd, 0, sizeof(cmd));
1167                 cmd.opCode = PHY_CALIBRATE_DIFF_GAIN_CMD;
1168                 cmd.diff_gain_a = 0;
1169                 cmd.diff_gain_b = 0;
1170                 cmd.diff_gain_c = 0;
1171                 rc = iwl_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
1172                                  sizeof(cmd), &cmd);
1173                 msleep(4);
1174                 data->state = IWL_CHAIN_NOISE_ACCUMULATE;
1175                 IWL_DEBUG_CALIB("Run chain_noise_calibrate\n");
1176         }
1177         return;
1178 }
1179
1180 /*
1181  * Accumulate 20 beacons of signal and noise statistics for each of
1182  *   3 receivers/antennas/rx-chains, then figure out:
1183  * 1)  Which antennas are connected.
1184  * 2)  Differential rx gain settings to balance the 3 receivers.
1185  */
1186 static void iwl4965_noise_calibration(struct iwl_priv *priv,
1187                                       struct iwl_notif_statistics *stat_resp)
1188 {
1189         struct iwl_chain_noise_data *data = NULL;
1190         int rc = 0;
1191
1192         u32 chain_noise_a;
1193         u32 chain_noise_b;
1194         u32 chain_noise_c;
1195         u32 chain_sig_a;
1196         u32 chain_sig_b;
1197         u32 chain_sig_c;
1198         u32 average_sig[NUM_RX_CHAINS] = {INITIALIZATION_VALUE};
1199         u32 average_noise[NUM_RX_CHAINS] = {INITIALIZATION_VALUE};
1200         u32 max_average_sig;
1201         u16 max_average_sig_antenna_i;
1202         u32 min_average_noise = MIN_AVERAGE_NOISE_MAX_VALUE;
1203         u16 min_average_noise_antenna_i = INITIALIZATION_VALUE;
1204         u16 i = 0;
1205         u16 chan_num = INITIALIZATION_VALUE;
1206         u32 band = INITIALIZATION_VALUE;
1207         u32 active_chains = 0;
1208         unsigned long flags;
1209         struct statistics_rx_non_phy *rx_info = &(stat_resp->rx.general);
1210
1211         data = &(priv->chain_noise_data);
1212
1213         /* Accumulate just the first 20 beacons after the first association,
1214          *   then we're done forever. */
1215         if (data->state != IWL_CHAIN_NOISE_ACCUMULATE) {
1216                 if (data->state == IWL_CHAIN_NOISE_ALIVE)
1217                         IWL_DEBUG_CALIB("Wait for noise calib reset\n");
1218                 return;
1219         }
1220
1221         spin_lock_irqsave(&priv->lock, flags);
1222         if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) {
1223                 IWL_DEBUG_CALIB(" << Interference data unavailable\n");
1224                 spin_unlock_irqrestore(&priv->lock, flags);
1225                 return;
1226         }
1227
1228         band = (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) ? 0 : 1;
1229         chan_num = le16_to_cpu(priv->staging_rxon.channel);
1230
1231         /* Make sure we accumulate data for just the associated channel
1232          *   (even if scanning). */
1233         if ((chan_num != (le32_to_cpu(stat_resp->flag) >> 16)) ||
1234             ((STATISTICS_REPLY_FLG_BAND_24G_MSK ==
1235              (stat_resp->flag & STATISTICS_REPLY_FLG_BAND_24G_MSK)) && band)) {
1236                 IWL_DEBUG_CALIB("Stats not from chan=%d, band=%d\n",
1237                                 chan_num, band);
1238                 spin_unlock_irqrestore(&priv->lock, flags);
1239                 return;
1240         }
1241
1242         /* Accumulate beacon statistics values across 20 beacons */
1243         chain_noise_a = le32_to_cpu(rx_info->beacon_silence_rssi_a) &
1244                                 IN_BAND_FILTER;
1245         chain_noise_b = le32_to_cpu(rx_info->beacon_silence_rssi_b) &
1246                                 IN_BAND_FILTER;
1247         chain_noise_c = le32_to_cpu(rx_info->beacon_silence_rssi_c) &
1248                                 IN_BAND_FILTER;
1249
1250         chain_sig_a = le32_to_cpu(rx_info->beacon_rssi_a) & IN_BAND_FILTER;
1251         chain_sig_b = le32_to_cpu(rx_info->beacon_rssi_b) & IN_BAND_FILTER;
1252         chain_sig_c = le32_to_cpu(rx_info->beacon_rssi_c) & IN_BAND_FILTER;
1253
1254         spin_unlock_irqrestore(&priv->lock, flags);
1255
1256         data->beacon_count++;
1257
1258         data->chain_noise_a = (chain_noise_a + data->chain_noise_a);
1259         data->chain_noise_b = (chain_noise_b + data->chain_noise_b);
1260         data->chain_noise_c = (chain_noise_c + data->chain_noise_c);
1261
1262         data->chain_signal_a = (chain_sig_a + data->chain_signal_a);
1263         data->chain_signal_b = (chain_sig_b + data->chain_signal_b);
1264         data->chain_signal_c = (chain_sig_c + data->chain_signal_c);
1265
1266         IWL_DEBUG_CALIB("chan=%d, band=%d, beacon=%d\n", chan_num, band,
1267                         data->beacon_count);
1268         IWL_DEBUG_CALIB("chain_sig: a %d b %d c %d\n",
1269                         chain_sig_a, chain_sig_b, chain_sig_c);
1270         IWL_DEBUG_CALIB("chain_noise: a %d b %d c %d\n",
1271                         chain_noise_a, chain_noise_b, chain_noise_c);
1272
1273         /* If this is the 20th beacon, determine:
1274          * 1)  Disconnected antennas (using signal strengths)
1275          * 2)  Differential gain (using silence noise) to balance receivers */
1276         if (data->beacon_count == CAL_NUM_OF_BEACONS) {
1277
1278                 /* Analyze signal for disconnected antenna */
1279                 average_sig[0] = (data->chain_signal_a) / CAL_NUM_OF_BEACONS;
1280                 average_sig[1] = (data->chain_signal_b) / CAL_NUM_OF_BEACONS;
1281                 average_sig[2] = (data->chain_signal_c) / CAL_NUM_OF_BEACONS;
1282
1283                 if (average_sig[0] >= average_sig[1]) {
1284                         max_average_sig = average_sig[0];
1285                         max_average_sig_antenna_i = 0;
1286                         active_chains = (1 << max_average_sig_antenna_i);
1287                 } else {
1288                         max_average_sig = average_sig[1];
1289                         max_average_sig_antenna_i = 1;
1290                         active_chains = (1 << max_average_sig_antenna_i);
1291                 }
1292
1293                 if (average_sig[2] >= max_average_sig) {
1294                         max_average_sig = average_sig[2];
1295                         max_average_sig_antenna_i = 2;
1296                         active_chains = (1 << max_average_sig_antenna_i);
1297                 }
1298
1299                 IWL_DEBUG_CALIB("average_sig: a %d b %d c %d\n",
1300                              average_sig[0], average_sig[1], average_sig[2]);
1301                 IWL_DEBUG_CALIB("max_average_sig = %d, antenna %d\n",
1302                              max_average_sig, max_average_sig_antenna_i);
1303
1304                 /* Compare signal strengths for all 3 receivers. */
1305                 for (i = 0; i < NUM_RX_CHAINS; i++) {
1306                         if (i != max_average_sig_antenna_i) {
1307                                 s32 rssi_delta = (max_average_sig -
1308                                                   average_sig[i]);
1309
1310                                 /* If signal is very weak, compared with
1311                                  * strongest, mark it as disconnected. */
1312                                 if (rssi_delta > MAXIMUM_ALLOWED_PATHLOSS)
1313                                         data->disconn_array[i] = 1;
1314                                 else
1315                                         active_chains |= (1 << i);
1316                         IWL_DEBUG_CALIB("i = %d  rssiDelta = %d  "
1317                                      "disconn_array[i] = %d\n",
1318                                      i, rssi_delta, data->disconn_array[i]);
1319                         }
1320                 }
1321
1322                 /*If both chains A & B are disconnected -
1323                  * connect B and leave A as is */
1324                 if (data->disconn_array[CHAIN_A] &&
1325                     data->disconn_array[CHAIN_B]) {
1326                         data->disconn_array[CHAIN_B] = 0;
1327                         active_chains |= (1 << CHAIN_B);
1328                         IWL_DEBUG_CALIB("both A & B chains are disconnected! "
1329                                      "W/A - declare B as connected\n");
1330                 }
1331
1332                 IWL_DEBUG_CALIB("active_chains (bitwise) = 0x%x\n",
1333                                 active_chains);
1334
1335                 /* Save for use within RXON, TX, SCAN commands, etc. */
1336                 priv->valid_antenna = active_chains;
1337
1338                 /* Analyze noise for rx balance */
1339                 average_noise[0] = ((data->chain_noise_a)/CAL_NUM_OF_BEACONS);
1340                 average_noise[1] = ((data->chain_noise_b)/CAL_NUM_OF_BEACONS);
1341                 average_noise[2] = ((data->chain_noise_c)/CAL_NUM_OF_BEACONS);
1342
1343                 for (i = 0; i < NUM_RX_CHAINS; i++) {
1344                         if (!(data->disconn_array[i]) &&
1345                            (average_noise[i] <= min_average_noise)) {
1346                                 /* This means that chain i is active and has
1347                                  * lower noise values so far: */
1348                                 min_average_noise = average_noise[i];
1349                                 min_average_noise_antenna_i = i;
1350                         }
1351                 }
1352
1353                 data->delta_gain_code[min_average_noise_antenna_i] = 0;
1354
1355                 IWL_DEBUG_CALIB("average_noise: a %d b %d c %d\n",
1356                                 average_noise[0], average_noise[1],
1357                                 average_noise[2]);
1358
1359                 IWL_DEBUG_CALIB("min_average_noise = %d, antenna %d\n",
1360                                 min_average_noise, min_average_noise_antenna_i);
1361
1362                 for (i = 0; i < NUM_RX_CHAINS; i++) {
1363                         s32 delta_g = 0;
1364
1365                         if (!(data->disconn_array[i]) &&
1366                             (data->delta_gain_code[i] ==
1367                              CHAIN_NOISE_DELTA_GAIN_INIT_VAL)) {
1368                                 delta_g = average_noise[i] - min_average_noise;
1369                                 data->delta_gain_code[i] = (u8)((delta_g *
1370                                                                     10) / 15);
1371                                 if (CHAIN_NOISE_MAX_DELTA_GAIN_CODE <
1372                                    data->delta_gain_code[i])
1373                                         data->delta_gain_code[i] =
1374                                           CHAIN_NOISE_MAX_DELTA_GAIN_CODE;
1375
1376                                 data->delta_gain_code[i] =
1377                                         (data->delta_gain_code[i] | (1 << 2));
1378                         } else
1379                                 data->delta_gain_code[i] = 0;
1380                 }
1381                 IWL_DEBUG_CALIB("delta_gain_codes: a %d b %d c %d\n",
1382                              data->delta_gain_code[0],
1383                              data->delta_gain_code[1],
1384                              data->delta_gain_code[2]);
1385
1386                 /* Differential gain gets sent to uCode only once */
1387                 if (!data->radio_write) {
1388                         struct iwl_calibration_cmd cmd;
1389                         data->radio_write = 1;
1390
1391                         memset(&cmd, 0, sizeof(cmd));
1392                         cmd.opCode = PHY_CALIBRATE_DIFF_GAIN_CMD;
1393                         cmd.diff_gain_a = data->delta_gain_code[0];
1394                         cmd.diff_gain_b = data->delta_gain_code[1];
1395                         cmd.diff_gain_c = data->delta_gain_code[2];
1396                         rc = iwl_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
1397                                               sizeof(cmd), &cmd);
1398                         if (rc)
1399                                 IWL_DEBUG_CALIB("fail sending cmd "
1400                                              "REPLY_PHY_CALIBRATION_CMD \n");
1401
1402                         /* TODO we might want recalculate
1403                          * rx_chain in rxon cmd */
1404
1405                         /* Mark so we run this algo only once! */
1406                         data->state = IWL_CHAIN_NOISE_CALIBRATED;
1407                 }
1408                 data->chain_noise_a = 0;
1409                 data->chain_noise_b = 0;
1410                 data->chain_noise_c = 0;
1411                 data->chain_signal_a = 0;
1412                 data->chain_signal_b = 0;
1413                 data->chain_signal_c = 0;
1414                 data->beacon_count = 0;
1415         }
1416         return;
1417 }
1418
1419 static void iwl4965_sensitivity_calibration(struct iwl_priv *priv,
1420                                             struct iwl_notif_statistics *resp)
1421 {
1422         int rc = 0;
1423         u32 rx_enable_time;
1424         u32 fa_cck;
1425         u32 fa_ofdm;
1426         u32 bad_plcp_cck;
1427         u32 bad_plcp_ofdm;
1428         u32 norm_fa_ofdm;
1429         u32 norm_fa_cck;
1430         struct iwl_sensitivity_data *data = NULL;
1431         struct statistics_rx_non_phy *rx_info = &(resp->rx.general);
1432         struct statistics_rx *statistics = &(resp->rx);
1433         unsigned long flags;
1434         struct statistics_general_data statis;
1435
1436         data = &(priv->sensitivity_data);
1437
1438         if (!iwl_is_associated(priv)) {
1439                 IWL_DEBUG_CALIB("<< - not associated\n");
1440                 return;
1441         }
1442
1443         spin_lock_irqsave(&priv->lock, flags);
1444         if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) {
1445                 IWL_DEBUG_CALIB("<< invalid data.\n");
1446                 spin_unlock_irqrestore(&priv->lock, flags);
1447                 return;
1448         }
1449
1450         /* Extract Statistics: */
1451         rx_enable_time = le32_to_cpu(rx_info->channel_load);
1452         fa_cck = le32_to_cpu(statistics->cck.false_alarm_cnt);
1453         fa_ofdm = le32_to_cpu(statistics->ofdm.false_alarm_cnt);
1454         bad_plcp_cck = le32_to_cpu(statistics->cck.plcp_err);
1455         bad_plcp_ofdm = le32_to_cpu(statistics->ofdm.plcp_err);
1456
1457         statis.beacon_silence_rssi_a =
1458                         le32_to_cpu(statistics->general.beacon_silence_rssi_a);
1459         statis.beacon_silence_rssi_b =
1460                         le32_to_cpu(statistics->general.beacon_silence_rssi_b);
1461         statis.beacon_silence_rssi_c =
1462                         le32_to_cpu(statistics->general.beacon_silence_rssi_c);
1463         statis.beacon_energy_a =
1464                         le32_to_cpu(statistics->general.beacon_energy_a);
1465         statis.beacon_energy_b =
1466                         le32_to_cpu(statistics->general.beacon_energy_b);
1467         statis.beacon_energy_c =
1468                         le32_to_cpu(statistics->general.beacon_energy_c);
1469
1470         spin_unlock_irqrestore(&priv->lock, flags);
1471
1472         IWL_DEBUG_CALIB("rx_enable_time = %u usecs\n", rx_enable_time);
1473
1474         if (!rx_enable_time) {
1475                 IWL_DEBUG_CALIB("<< RX Enable Time == 0! \n");
1476                 return;
1477         }
1478
1479         /* These statistics increase monotonically, and do not reset
1480          *   at each beacon.  Calculate difference from last value, or just
1481          *   use the new statistics value if it has reset or wrapped around. */
1482         if (data->last_bad_plcp_cnt_cck > bad_plcp_cck)
1483                 data->last_bad_plcp_cnt_cck = bad_plcp_cck;
1484         else {
1485                 bad_plcp_cck -= data->last_bad_plcp_cnt_cck;
1486                 data->last_bad_plcp_cnt_cck += bad_plcp_cck;
1487         }
1488
1489         if (data->last_bad_plcp_cnt_ofdm > bad_plcp_ofdm)
1490                 data->last_bad_plcp_cnt_ofdm = bad_plcp_ofdm;
1491         else {
1492                 bad_plcp_ofdm -= data->last_bad_plcp_cnt_ofdm;
1493                 data->last_bad_plcp_cnt_ofdm += bad_plcp_ofdm;
1494         }
1495
1496         if (data->last_fa_cnt_ofdm > fa_ofdm)
1497                 data->last_fa_cnt_ofdm = fa_ofdm;
1498         else {
1499                 fa_ofdm -= data->last_fa_cnt_ofdm;
1500                 data->last_fa_cnt_ofdm += fa_ofdm;
1501         }
1502
1503         if (data->last_fa_cnt_cck > fa_cck)
1504                 data->last_fa_cnt_cck = fa_cck;
1505         else {
1506                 fa_cck -= data->last_fa_cnt_cck;
1507                 data->last_fa_cnt_cck += fa_cck;
1508         }
1509
1510         /* Total aborted signal locks */
1511         norm_fa_ofdm = fa_ofdm + bad_plcp_ofdm;
1512         norm_fa_cck = fa_cck + bad_plcp_cck;
1513
1514         IWL_DEBUG_CALIB("cck: fa %u badp %u  ofdm: fa %u badp %u\n", fa_cck,
1515                         bad_plcp_cck, fa_ofdm, bad_plcp_ofdm);
1516
1517         iwl4965_sens_auto_corr_ofdm(priv, norm_fa_ofdm, rx_enable_time);
1518         iwl4965_sens_energy_cck(priv, norm_fa_cck, rx_enable_time, &statis);
1519         rc |= iwl4965_sensitivity_write(priv, CMD_ASYNC);
1520
1521         return;
1522 }
1523
1524 static void iwl4965_bg_sensitivity_work(struct work_struct *work)
1525 {
1526         struct iwl_priv *priv = container_of(work, struct iwl_priv,
1527                         sensitivity_work);
1528
1529         mutex_lock(&priv->mutex);
1530
1531         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
1532             test_bit(STATUS_SCANNING, &priv->status)) {
1533                 mutex_unlock(&priv->mutex);
1534                 return;
1535         }
1536
1537         if (priv->start_calib) {
1538                 iwl4965_noise_calibration(priv, &priv->statistics);
1539
1540                 if (priv->sensitivity_data.state ==
1541                                         IWL_SENS_CALIB_NEED_REINIT) {
1542                         iwl4965_init_sensitivity(priv, CMD_ASYNC, 0);
1543                         priv->sensitivity_data.state = IWL_SENS_CALIB_ALLOWED;
1544                 } else
1545                         iwl4965_sensitivity_calibration(priv,
1546                                         &priv->statistics);
1547         }
1548
1549         mutex_unlock(&priv->mutex);
1550         return;
1551 }
1552 #endif /*CONFIG_IWLWIFI_SENSITIVITY*/
1553
1554 static void iwl4965_bg_txpower_work(struct work_struct *work)
1555 {
1556         struct iwl_priv *priv = container_of(work, struct iwl_priv,
1557                         txpower_work);
1558
1559         /* If a scan happened to start before we got here
1560          * then just return; the statistics notification will
1561          * kick off another scheduled work to compensate for
1562          * any temperature delta we missed here. */
1563         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
1564             test_bit(STATUS_SCANNING, &priv->status))
1565                 return;
1566
1567         mutex_lock(&priv->mutex);
1568
1569         /* Regardless of if we are assocaited, we must reconfigure the
1570          * TX power since frames can be sent on non-radar channels while
1571          * not associated */
1572         iwl_hw_reg_send_txpower(priv);
1573
1574         /* Update last_temperature to keep is_calib_needed from running
1575          * when it isn't needed... */
1576         priv->last_temperature = priv->temperature;
1577
1578         mutex_unlock(&priv->mutex);
1579 }
1580
1581 /*
1582  * Acquire priv->lock before calling this function !
1583  */
1584 static void iwl4965_set_wr_ptrs(struct iwl_priv *priv, int txq_id, u32 index)
1585 {
1586         iwl_write_restricted(priv, HBUS_TARG_WRPTR,
1587                              (index & 0xff) | (txq_id << 8));
1588         iwl_write_restricted_reg(priv, SCD_QUEUE_RDPTR(txq_id), index);
1589 }
1590
1591 /*
1592  * Acquire priv->lock before calling this function !
1593  */
1594 static void iwl4965_tx_queue_set_status(struct iwl_priv *priv,
1595                                         struct iwl_tx_queue *txq,
1596                                         int tx_fifo_id, int scd_retry)
1597 {
1598         int txq_id = txq->q.id;
1599         int active = test_bit(txq_id, &priv->txq_ctx_active_msk)?1:0;
1600
1601         iwl_write_restricted_reg(priv, SCD_QUEUE_STATUS_BITS(txq_id),
1602                                  (active << SCD_QUEUE_STTS_REG_POS_ACTIVE) |
1603                                  (tx_fifo_id << SCD_QUEUE_STTS_REG_POS_TXF) |
1604                                  (scd_retry << SCD_QUEUE_STTS_REG_POS_WSL) |
1605                                  (scd_retry << SCD_QUEUE_STTS_REG_POS_SCD_ACK) |
1606                                  SCD_QUEUE_STTS_REG_MSK);
1607
1608         txq->sched_retry = scd_retry;
1609
1610         IWL_DEBUG_INFO("%s %s Queue %d on AC %d\n",
1611                        active ? "Activete" : "Deactivate",
1612                        scd_retry ? "BA" : "AC", txq_id, tx_fifo_id);
1613 }
1614
1615 static const u16 default_queue_to_tx_fifo[] = {
1616         IWL_TX_FIFO_AC3,
1617         IWL_TX_FIFO_AC2,
1618         IWL_TX_FIFO_AC1,
1619         IWL_TX_FIFO_AC0,
1620         IWL_CMD_FIFO_NUM,
1621         IWL_TX_FIFO_HCCA_1,
1622         IWL_TX_FIFO_HCCA_2
1623 };
1624
1625 static inline void iwl4965_txq_ctx_activate(struct iwl_priv *priv, int txq_id)
1626 {
1627         set_bit(txq_id, &priv->txq_ctx_active_msk);
1628 }
1629
1630 static inline void iwl4965_txq_ctx_deactivate(struct iwl_priv *priv, int txq_id)
1631 {
1632         clear_bit(txq_id, &priv->txq_ctx_active_msk);
1633 }
1634
1635 int iwl4965_alive_notify(struct iwl_priv *priv)
1636 {
1637         u32 a;
1638         int i = 0;
1639         unsigned long flags;
1640         int rc;
1641
1642         spin_lock_irqsave(&priv->lock, flags);
1643
1644 #ifdef CONFIG_IWLWIFI_SENSITIVITY
1645         memset(&(priv->sensitivity_data), 0,
1646                sizeof(struct iwl_sensitivity_data));
1647         memset(&(priv->chain_noise_data), 0,
1648                sizeof(struct iwl_chain_noise_data));
1649         for (i = 0; i < NUM_RX_CHAINS; i++)
1650                 priv->chain_noise_data.delta_gain_code[i] =
1651                                 CHAIN_NOISE_DELTA_GAIN_INIT_VAL;
1652 #endif /* CONFIG_IWLWIFI_SENSITIVITY*/
1653         rc = iwl_grab_restricted_access(priv);
1654         if (rc) {
1655                 spin_unlock_irqrestore(&priv->lock, flags);
1656                 return rc;
1657         }
1658
1659         priv->scd_base_addr = iwl_read_restricted_reg(priv, SCD_SRAM_BASE_ADDR);
1660         a = priv->scd_base_addr + SCD_CONTEXT_DATA_OFFSET;
1661         for (; a < priv->scd_base_addr + SCD_TX_STTS_BITMAP_OFFSET; a += 4)
1662                 iwl_write_restricted_mem(priv, a, 0);
1663         for (; a < priv->scd_base_addr + SCD_TRANSLATE_TBL_OFFSET; a += 4)
1664                 iwl_write_restricted_mem(priv, a, 0);
1665         for (; a < sizeof(u16) * priv->hw_setting.max_txq_num; a += 4)
1666                 iwl_write_restricted_mem(priv, a, 0);
1667
1668         iwl_write_restricted_reg(priv, SCD_DRAM_BASE_ADDR,
1669                 (priv->hw_setting.shared_phys +
1670                  offsetof(struct iwl_shared, queues_byte_cnt_tbls)) >> 10);
1671         iwl_write_restricted_reg(priv, SCD_QUEUECHAIN_SEL, 0);
1672
1673         /* initiate the queues */
1674         for (i = 0; i < priv->hw_setting.max_txq_num; i++) {
1675                 iwl_write_restricted_reg(priv, SCD_QUEUE_RDPTR(i), 0);
1676                 iwl_write_restricted(priv, HBUS_TARG_WRPTR, 0 | (i << 8));
1677                 iwl_write_restricted_mem(priv, priv->scd_base_addr +
1678                                         SCD_CONTEXT_QUEUE_OFFSET(i),
1679                                         (SCD_WIN_SIZE <<
1680                                         SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
1681                                         SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
1682                 iwl_write_restricted_mem(priv, priv->scd_base_addr +
1683                                         SCD_CONTEXT_QUEUE_OFFSET(i) +
1684                                         sizeof(u32),
1685                                         (SCD_FRAME_LIMIT <<
1686                                         SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) &
1687                                         SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
1688
1689         }
1690         iwl_write_restricted_reg(priv, SCD_INTERRUPT_MASK,
1691                                  (1 << priv->hw_setting.max_txq_num) - 1);
1692
1693         iwl_write_restricted_reg(priv, SCD_TXFACT,
1694                                  SCD_TXFACT_REG_TXFIFO_MASK(0, 7));
1695
1696         iwl4965_set_wr_ptrs(priv, IWL_CMD_QUEUE_NUM, 0);
1697         /* map qos queues to fifos one-to-one */
1698         for (i = 0; i < ARRAY_SIZE(default_queue_to_tx_fifo); i++) {
1699                 int ac = default_queue_to_tx_fifo[i];
1700                 iwl4965_txq_ctx_activate(priv, i);
1701                 iwl4965_tx_queue_set_status(priv, &priv->txq[i], ac, 0);
1702         }
1703
1704         iwl_release_restricted_access(priv);
1705         spin_unlock_irqrestore(&priv->lock, flags);
1706
1707         return 0;
1708 }
1709
1710 int iwl_hw_set_hw_setting(struct iwl_priv *priv)
1711 {
1712         priv->hw_setting.shared_virt =
1713             pci_alloc_consistent(priv->pci_dev,
1714                                  sizeof(struct iwl_shared),
1715                                  &priv->hw_setting.shared_phys);
1716
1717         if (!priv->hw_setting.shared_virt)
1718                 return -1;
1719
1720         memset(priv->hw_setting.shared_virt, 0, sizeof(struct iwl_shared));
1721
1722         priv->hw_setting.max_txq_num = iwl_param_queues_num;
1723         priv->hw_setting.ac_queue_count = AC_NUM;
1724
1725         priv->hw_setting.cck_flag = RATE_MCS_CCK_MSK;
1726         priv->hw_setting.tx_cmd_len = sizeof(struct iwl_tx_cmd);
1727         priv->hw_setting.max_rxq_size = RX_QUEUE_SIZE;
1728         priv->hw_setting.max_rxq_log = RX_QUEUE_SIZE_LOG;
1729
1730         priv->hw_setting.max_stations = IWL4965_STATION_COUNT;
1731         priv->hw_setting.bcast_sta_id = IWL4965_BROADCAST_ID;
1732         return 0;
1733 }
1734
1735 /**
1736  * iwl_hw_txq_ctx_free - Free TXQ Context
1737  *
1738  * Destroy all TX DMA queues and structures
1739  */
1740 void iwl_hw_txq_ctx_free(struct iwl_priv *priv)
1741 {
1742         int txq_id;
1743
1744         /* Tx queues */
1745         for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++)
1746                 iwl_tx_queue_free(priv, &priv->txq[txq_id]);
1747
1748         iwl4965_kw_free(priv);
1749 }
1750
1751 /**
1752  * iwl_hw_txq_free_tfd -  Free one TFD, those at index [txq->q.last_used]
1753  *
1754  * Does NOT advance any indexes
1755  */
1756 int iwl_hw_txq_free_tfd(struct iwl_priv *priv, struct iwl_tx_queue *txq)
1757 {
1758         struct iwl_tfd_frame *bd_tmp = (struct iwl_tfd_frame *)&txq->bd[0];
1759         struct iwl_tfd_frame *bd = &bd_tmp[txq->q.last_used];
1760         struct pci_dev *dev = priv->pci_dev;
1761         int i;
1762         int counter = 0;
1763         int index, is_odd;
1764
1765         /* classify bd */
1766         if (txq->q.id == IWL_CMD_QUEUE_NUM)
1767                 /* nothing to cleanup after for host commands */
1768                 return 0;
1769
1770         /* sanity check */
1771         counter = IWL_GET_BITS(*bd, num_tbs);
1772         if (counter > MAX_NUM_OF_TBS) {
1773                 IWL_ERROR("Too many chunks: %i\n", counter);
1774                 /* @todo issue fatal error, it is quite serious situation */
1775                 return 0;
1776         }
1777
1778         /* unmap chunks if any */
1779
1780         for (i = 0; i < counter; i++) {
1781                 index = i / 2;
1782                 is_odd = i & 0x1;
1783
1784                 if (is_odd)
1785                         pci_unmap_single(
1786                                 dev,
1787                                 IWL_GET_BITS(bd->pa[index], tb2_addr_lo16) |
1788                                 (IWL_GET_BITS(bd->pa[index],
1789                                               tb2_addr_hi20) << 16),
1790                                 IWL_GET_BITS(bd->pa[index], tb2_len),
1791                                 PCI_DMA_TODEVICE);
1792
1793                 else if (i > 0)
1794                         pci_unmap_single(dev,
1795                                          le32_to_cpu(bd->pa[index].tb1_addr),
1796                                          IWL_GET_BITS(bd->pa[index], tb1_len),
1797                                          PCI_DMA_TODEVICE);
1798
1799                 if (txq->txb[txq->q.last_used].skb[i]) {
1800                         struct sk_buff *skb = txq->txb[txq->q.last_used].skb[i];
1801
1802                         dev_kfree_skb(skb);
1803                         txq->txb[txq->q.last_used].skb[i] = NULL;
1804                 }
1805         }
1806         return 0;
1807 }
1808
1809 int iwl_hw_reg_set_txpower(struct iwl_priv *priv, s8 power)
1810 {
1811         IWL_ERROR("TODO: Implement iwl_hw_reg_set_txpower!\n");
1812         return -EINVAL;
1813 }
1814
1815 static s32 iwl4965_math_div_round(s32 num, s32 denom, s32 *res)
1816 {
1817         s32 sign = 1;
1818
1819         if (num < 0) {
1820                 sign = -sign;
1821                 num = -num;
1822         }
1823         if (denom < 0) {
1824                 sign = -sign;
1825                 denom = -denom;
1826         }
1827         *res = 1;
1828         *res = ((num * 2 + denom) / (denom * 2)) * sign;
1829
1830         return 1;
1831 }
1832
1833 static s32 iwl4965_get_voltage_compensation(s32 eeprom_voltage,
1834                                             s32 current_voltage)
1835 {
1836         s32 comp = 0;
1837
1838         if ((TX_POWER_IWL_ILLEGAL_VOLTAGE == eeprom_voltage) ||
1839             (TX_POWER_IWL_ILLEGAL_VOLTAGE == current_voltage))
1840                 return 0;
1841
1842         iwl4965_math_div_round(current_voltage - eeprom_voltage,
1843                                TX_POWER_IWL_VOLTAGE_CODES_PER_03V, &comp);
1844
1845         if (current_voltage > eeprom_voltage)
1846                 comp *= 2;
1847         if ((comp < -2) || (comp > 2))
1848                 comp = 0;
1849
1850         return comp;
1851 }
1852
1853 static const struct iwl_channel_info *
1854 iwl4965_get_channel_txpower_info(struct iwl_priv *priv, u8 phymode, u16 channel)
1855 {
1856         const struct iwl_channel_info *ch_info;
1857
1858         ch_info = iwl_get_channel_info(priv, phymode, channel);
1859
1860         if (!is_channel_valid(ch_info))
1861                 return NULL;
1862
1863         return ch_info;
1864 }
1865
1866 static s32 iwl4965_get_tx_atten_grp(u16 channel)
1867 {
1868         if (channel >= CALIB_IWL_TX_ATTEN_GR5_FCH &&
1869             channel <= CALIB_IWL_TX_ATTEN_GR5_LCH)
1870                 return CALIB_CH_GROUP_5;
1871
1872         if (channel >= CALIB_IWL_TX_ATTEN_GR1_FCH &&
1873             channel <= CALIB_IWL_TX_ATTEN_GR1_LCH)
1874                 return CALIB_CH_GROUP_1;
1875
1876         if (channel >= CALIB_IWL_TX_ATTEN_GR2_FCH &&
1877             channel <= CALIB_IWL_TX_ATTEN_GR2_LCH)
1878                 return CALIB_CH_GROUP_2;
1879
1880         if (channel >= CALIB_IWL_TX_ATTEN_GR3_FCH &&
1881             channel <= CALIB_IWL_TX_ATTEN_GR3_LCH)
1882                 return CALIB_CH_GROUP_3;
1883
1884         if (channel >= CALIB_IWL_TX_ATTEN_GR4_FCH &&
1885             channel <= CALIB_IWL_TX_ATTEN_GR4_LCH)
1886                 return CALIB_CH_GROUP_4;
1887
1888         IWL_ERROR("Can't find txatten group for channel %d.\n", channel);
1889         return -1;
1890 }
1891
1892 static u32 iwl4965_get_sub_band(const struct iwl_priv *priv, u32 channel)
1893 {
1894         s32 b = -1;
1895
1896         for (b = 0; b < EEPROM_TX_POWER_BANDS; b++) {
1897                 if (priv->eeprom.calib_info.band_info[b].ch_from == 0)
1898                         continue;
1899
1900                 if ((channel >= priv->eeprom.calib_info.band_info[b].ch_from)
1901                     && (channel <= priv->eeprom.calib_info.band_info[b].ch_to))
1902                         break;
1903         }
1904
1905         return b;
1906 }
1907
1908 static s32 iwl4965_interpolate_value(s32 x, s32 x1, s32 y1, s32 x2, s32 y2)
1909 {
1910         s32 val;
1911
1912         if (x2 == x1)
1913                 return y1;
1914         else {
1915                 iwl4965_math_div_round((x2 - x) * (y1 - y2), (x2 - x1), &val);
1916                 return val + y2;
1917         }
1918 }
1919
1920 static int iwl4965_interpolate_chan(struct iwl_priv *priv, u32 channel,
1921                                     struct iwl_eeprom_calib_ch_info *chan_info)
1922 {
1923         s32 s = -1;
1924         u32 c;
1925         u32 m;
1926         const struct iwl_eeprom_calib_measure *m1;
1927         const struct iwl_eeprom_calib_measure *m2;
1928         struct iwl_eeprom_calib_measure *omeas;
1929         u32 ch_i1;
1930         u32 ch_i2;
1931
1932         s = iwl4965_get_sub_band(priv, channel);
1933         if (s >= EEPROM_TX_POWER_BANDS) {
1934                 IWL_ERROR("Tx Power can not find channel %d ", channel);
1935                 return -1;
1936         }
1937
1938         ch_i1 = priv->eeprom.calib_info.band_info[s].ch1.ch_num;
1939         ch_i2 = priv->eeprom.calib_info.band_info[s].ch2.ch_num;
1940         chan_info->ch_num = (u8) channel;
1941
1942         IWL_DEBUG_TXPOWER("channel %d subband %d factory cal ch %d & %d\n",
1943                           channel, s, ch_i1, ch_i2);
1944
1945         for (c = 0; c < EEPROM_TX_POWER_TX_CHAINS; c++) {
1946                 for (m = 0; m < EEPROM_TX_POWER_MEASUREMENTS; m++) {
1947                         m1 = &(priv->eeprom.calib_info.band_info[s].ch1.
1948                                measurements[c][m]);
1949                         m2 = &(priv->eeprom.calib_info.band_info[s].ch2.
1950                                measurements[c][m]);
1951                         omeas = &(chan_info->measurements[c][m]);
1952
1953                         omeas->actual_pow =
1954                             (u8) iwl4965_interpolate_value(channel, ch_i1,
1955                                                            m1->actual_pow,
1956                                                            ch_i2,
1957                                                            m2->actual_pow);
1958                         omeas->gain_idx =
1959                             (u8) iwl4965_interpolate_value(channel, ch_i1,
1960                                                            m1->gain_idx, ch_i2,
1961                                                            m2->gain_idx);
1962                         omeas->temperature =
1963                             (u8) iwl4965_interpolate_value(channel, ch_i1,
1964                                                            m1->temperature,
1965                                                            ch_i2,
1966                                                            m2->temperature);
1967                         omeas->pa_det =
1968                             (s8) iwl4965_interpolate_value(channel, ch_i1,
1969                                                            m1->pa_det, ch_i2,
1970                                                            m2->pa_det);
1971
1972                         IWL_DEBUG_TXPOWER
1973                             ("chain %d meas %d AP1=%d AP2=%d AP=%d\n", c, m,
1974                              m1->actual_pow, m2->actual_pow, omeas->actual_pow);
1975                         IWL_DEBUG_TXPOWER
1976                             ("chain %d meas %d NI1=%d NI2=%d NI=%d\n", c, m,
1977                              m1->gain_idx, m2->gain_idx, omeas->gain_idx);
1978                         IWL_DEBUG_TXPOWER
1979                             ("chain %d meas %d PA1=%d PA2=%d PA=%d\n", c, m,
1980                              m1->pa_det, m2->pa_det, omeas->pa_det);
1981                         IWL_DEBUG_TXPOWER
1982                             ("chain %d meas %d  T1=%d  T2=%d  T=%d\n", c, m,
1983                              m1->temperature, m2->temperature,
1984                              omeas->temperature);
1985                 }
1986         }
1987
1988         return 0;
1989 }
1990
1991 /* bit-rate-dependent table to prevent Tx distortion, in half-dB units,
1992  * for OFDM 6, 12, 18, 24, 36, 48, 54, 60 MBit, and CCK all rates. */
1993 static s32 back_off_table[] = {
1994         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 20 MHz */
1995         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 20 MHz */
1996         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 40 MHz */
1997         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 40 MHz */
1998         10                      /* CCK */
1999 };
2000
2001 /* Thermal compensation values for txpower for various frequency ranges ...
2002  *   ratios from 3:1 to 4.5:1 of degrees (Celsius) per half-dB gain adjust */
2003 static struct iwl_txpower_comp_entry {
2004         s32 degrees_per_05db_a;
2005         s32 degrees_per_05db_a_denom;
2006 } tx_power_cmp_tble[CALIB_CH_GROUP_MAX] = {
2007         {9, 2},                 /* group 0 5.2, ch  34-43 */
2008         {4, 1},                 /* group 1 5.2, ch  44-70 */
2009         {4, 1},                 /* group 2 5.2, ch  71-124 */
2010         {4, 1},                 /* group 3 5.2, ch 125-200 */
2011         {3, 1}                  /* group 4 2.4, ch   all */
2012 };
2013
2014 static s32 get_min_power_index(s32 rate_power_index, u32 band)
2015 {
2016         if (!band) {
2017                 if ((rate_power_index & 7) <= 4)
2018                         return MIN_TX_GAIN_INDEX_52GHZ_EXT;
2019         }
2020         return MIN_TX_GAIN_INDEX;
2021 }
2022
2023 struct gain_entry {
2024         u8 dsp;
2025         u8 radio;
2026 };
2027
2028 static const struct gain_entry gain_table[2][108] = {
2029         /* 5.2GHz power gain index table */
2030         {
2031          {123, 0x3F},           /* highest txpower */
2032          {117, 0x3F},
2033          {110, 0x3F},
2034          {104, 0x3F},
2035          {98, 0x3F},
2036          {110, 0x3E},
2037          {104, 0x3E},
2038          {98, 0x3E},
2039          {110, 0x3D},
2040          {104, 0x3D},
2041          {98, 0x3D},
2042          {110, 0x3C},
2043          {104, 0x3C},
2044          {98, 0x3C},
2045          {110, 0x3B},
2046          {104, 0x3B},
2047          {98, 0x3B},
2048          {110, 0x3A},
2049          {104, 0x3A},
2050          {98, 0x3A},
2051          {110, 0x39},
2052          {104, 0x39},
2053          {98, 0x39},
2054          {110, 0x38},
2055          {104, 0x38},
2056          {98, 0x38},
2057          {110, 0x37},
2058          {104, 0x37},
2059          {98, 0x37},
2060          {110, 0x36},
2061          {104, 0x36},
2062          {98, 0x36},
2063          {110, 0x35},
2064          {104, 0x35},
2065          {98, 0x35},
2066          {110, 0x34},
2067          {104, 0x34},
2068          {98, 0x34},
2069          {110, 0x33},
2070          {104, 0x33},
2071          {98, 0x33},
2072          {110, 0x32},
2073          {104, 0x32},
2074          {98, 0x32},
2075          {110, 0x31},
2076          {104, 0x31},
2077          {98, 0x31},
2078          {110, 0x30},
2079          {104, 0x30},
2080          {98, 0x30},
2081          {110, 0x25},
2082          {104, 0x25},
2083          {98, 0x25},
2084          {110, 0x24},
2085          {104, 0x24},
2086          {98, 0x24},
2087          {110, 0x23},
2088          {104, 0x23},
2089          {98, 0x23},
2090          {110, 0x22},
2091          {104, 0x18},
2092          {98, 0x18},
2093          {110, 0x17},
2094          {104, 0x17},
2095          {98, 0x17},
2096          {110, 0x16},
2097          {104, 0x16},
2098          {98, 0x16},
2099          {110, 0x15},
2100          {104, 0x15},
2101          {98, 0x15},
2102          {110, 0x14},
2103          {104, 0x14},
2104          {98, 0x14},
2105          {110, 0x13},
2106          {104, 0x13},
2107          {98, 0x13},
2108          {110, 0x12},
2109          {104, 0x08},
2110          {98, 0x08},
2111          {110, 0x07},
2112          {104, 0x07},
2113          {98, 0x07},
2114          {110, 0x06},
2115          {104, 0x06},
2116          {98, 0x06},
2117          {110, 0x05},
2118          {104, 0x05},
2119          {98, 0x05},
2120          {110, 0x04},
2121          {104, 0x04},
2122          {98, 0x04},
2123          {110, 0x03},
2124          {104, 0x03},
2125          {98, 0x03},
2126          {110, 0x02},
2127          {104, 0x02},
2128          {98, 0x02},
2129          {110, 0x01},
2130          {104, 0x01},
2131          {98, 0x01},
2132          {110, 0x00},
2133          {104, 0x00},
2134          {98, 0x00},
2135          {93, 0x00},
2136          {88, 0x00},
2137          {83, 0x00},
2138          {78, 0x00},
2139          },
2140         /* 2.4GHz power gain index table */
2141         {
2142          {110, 0x3f},           /* highest txpower */
2143          {104, 0x3f},
2144          {98, 0x3f},
2145          {110, 0x3e},
2146          {104, 0x3e},
2147          {98, 0x3e},
2148          {110, 0x3d},
2149          {104, 0x3d},
2150          {98, 0x3d},
2151          {110, 0x3c},
2152          {104, 0x3c},
2153          {98, 0x3c},
2154          {110, 0x3b},
2155          {104, 0x3b},
2156          {98, 0x3b},
2157          {110, 0x3a},
2158          {104, 0x3a},
2159          {98, 0x3a},
2160          {110, 0x39},
2161          {104, 0x39},
2162          {98, 0x39},
2163          {110, 0x38},
2164          {104, 0x38},
2165          {98, 0x38},
2166          {110, 0x37},
2167          {104, 0x37},
2168          {98, 0x37},
2169          {110, 0x36},
2170          {104, 0x36},
2171          {98, 0x36},
2172          {110, 0x35},
2173          {104, 0x35},
2174          {98, 0x35},
2175          {110, 0x34},
2176          {104, 0x34},
2177          {98, 0x34},
2178          {110, 0x33},
2179          {104, 0x33},
2180          {98, 0x33},
2181          {110, 0x32},
2182          {104, 0x32},
2183          {98, 0x32},
2184          {110, 0x31},
2185          {104, 0x31},
2186          {98, 0x31},
2187          {110, 0x30},
2188          {104, 0x30},
2189          {98, 0x30},
2190          {110, 0x6},
2191          {104, 0x6},
2192          {98, 0x6},
2193          {110, 0x5},
2194          {104, 0x5},
2195          {98, 0x5},
2196          {110, 0x4},
2197          {104, 0x4},
2198          {98, 0x4},
2199          {110, 0x3},
2200          {104, 0x3},
2201          {98, 0x3},
2202          {110, 0x2},
2203          {104, 0x2},
2204          {98, 0x2},
2205          {110, 0x1},
2206          {104, 0x1},
2207          {98, 0x1},
2208          {110, 0x0},
2209          {104, 0x0},
2210          {98, 0x0},
2211          {97, 0},
2212          {96, 0},
2213          {95, 0},
2214          {94, 0},
2215          {93, 0},
2216          {92, 0},
2217          {91, 0},
2218          {90, 0},
2219          {89, 0},
2220          {88, 0},
2221          {87, 0},
2222          {86, 0},
2223          {85, 0},
2224          {84, 0},
2225          {83, 0},
2226          {82, 0},
2227          {81, 0},
2228          {80, 0},
2229          {79, 0},
2230          {78, 0},
2231          {77, 0},
2232          {76, 0},
2233          {75, 0},
2234          {74, 0},
2235          {73, 0},
2236          {72, 0},
2237          {71, 0},
2238          {70, 0},
2239          {69, 0},
2240          {68, 0},
2241          {67, 0},
2242          {66, 0},
2243          {65, 0},
2244          {64, 0},
2245          {63, 0},
2246          {62, 0},
2247          {61, 0},
2248          {60, 0},
2249          {59, 0},
2250          }
2251 };
2252
2253 static int iwl4965_fill_txpower_tbl(struct iwl_priv *priv, u8 band, u16 channel,
2254                                     u8 is_fat, u8 ctrl_chan_high,
2255                                     struct iwl_tx_power_db *tx_power_tbl)
2256 {
2257         u8 saturation_power;
2258         s32 target_power;
2259         s32 user_target_power;
2260         s32 power_limit;
2261         s32 current_temp;
2262         s32 reg_limit;
2263         s32 current_regulatory;
2264         s32 txatten_grp = CALIB_CH_GROUP_MAX;
2265         int i;
2266         int c;
2267         const struct iwl_channel_info *ch_info = NULL;
2268         struct iwl_eeprom_calib_ch_info ch_eeprom_info;
2269         const struct iwl_eeprom_calib_measure *measurement;
2270         s16 voltage;
2271         s32 init_voltage;
2272         s32 voltage_compensation;
2273         s32 degrees_per_05db_num;
2274         s32 degrees_per_05db_denom;
2275         s32 factory_temp;
2276         s32 temperature_comp[2];
2277         s32 factory_gain_index[2];
2278         s32 factory_actual_pwr[2];
2279         s32 power_index;
2280
2281         /* Sanity check requested level (dBm) */
2282         if (priv->user_txpower_limit < IWL_TX_POWER_TARGET_POWER_MIN) {
2283                 IWL_WARNING("Requested user TXPOWER %d below limit.\n",
2284                             priv->user_txpower_limit);
2285                 return -EINVAL;
2286         }
2287         if (priv->user_txpower_limit > IWL_TX_POWER_TARGET_POWER_MAX) {
2288                 IWL_WARNING("Requested user TXPOWER %d above limit.\n",
2289                             priv->user_txpower_limit);
2290                 return -EINVAL;
2291         }
2292
2293         /* user_txpower_limit is in dBm, convert to half-dBm (half-dB units
2294          *   are used for indexing into txpower table) */
2295         user_target_power = 2 * priv->user_txpower_limit;
2296
2297         /* Get current (RXON) channel, band, width */
2298         ch_info =
2299                 iwl4965_get_channel_txpower_info(priv, priv->phymode, channel);
2300
2301         IWL_DEBUG_TXPOWER("chan %d band %d is_fat %d\n", channel, band,
2302                           is_fat);
2303
2304         if (!ch_info)
2305                 return -EINVAL;
2306
2307         /* get txatten group, used to select 1) thermal txpower adjustment
2308          *   and 2) mimo txpower balance between Tx chains. */
2309         txatten_grp = iwl4965_get_tx_atten_grp(channel);
2310         if (txatten_grp < 0)
2311                 return -EINVAL;
2312
2313         IWL_DEBUG_TXPOWER("channel %d belongs to txatten group %d\n",
2314                           channel, txatten_grp);
2315
2316         if (is_fat) {
2317                 if (ctrl_chan_high)
2318                         channel -= 2;
2319                 else
2320                         channel += 2;
2321         }
2322
2323         /* hardware txpower limits ...
2324          * saturation (clipping distortion) txpowers are in half-dBm */
2325         if (band)
2326                 saturation_power = priv->eeprom.calib_info.saturation_power24;
2327         else
2328                 saturation_power = priv->eeprom.calib_info.saturation_power52;
2329
2330         if (saturation_power < IWL_TX_POWER_SATURATION_MIN ||
2331             saturation_power > IWL_TX_POWER_SATURATION_MAX) {
2332                 if (band)
2333                         saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_24;
2334                 else
2335                         saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_52;
2336         }
2337
2338         /* regulatory txpower limits ... reg_limit values are in half-dBm,
2339          *   max_power_avg values are in dBm, convert * 2 */
2340         if (is_fat)
2341                 reg_limit = ch_info->fat_max_power_avg * 2;
2342         else
2343                 reg_limit = ch_info->max_power_avg * 2;
2344
2345         if ((reg_limit < IWL_TX_POWER_REGULATORY_MIN) ||
2346             (reg_limit > IWL_TX_POWER_REGULATORY_MAX)) {
2347                 if (band)
2348                         reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_24;
2349                 else
2350                         reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_52;
2351         }
2352
2353         /* Interpolate txpower calibration values for this channel,
2354          *   based on factory calibration tests on spaced channels. */
2355         iwl4965_interpolate_chan(priv, channel, &ch_eeprom_info);
2356
2357         /* calculate tx gain adjustment based on power supply voltage */
2358         voltage = priv->eeprom.calib_info.voltage;
2359         init_voltage = (s32)le32_to_cpu(priv->card_alive_init.voltage);
2360         voltage_compensation =
2361             iwl4965_get_voltage_compensation(voltage, init_voltage);
2362
2363         IWL_DEBUG_TXPOWER("curr volt %d eeprom volt %d volt comp %d\n",
2364                           init_voltage,
2365                           voltage, voltage_compensation);
2366
2367         /* get current temperature (Celsius) */
2368         current_temp = max(priv->temperature, IWL_TX_POWER_TEMPERATURE_MIN);
2369         current_temp = min(priv->temperature, IWL_TX_POWER_TEMPERATURE_MAX);
2370         current_temp = KELVIN_TO_CELSIUS(current_temp);
2371
2372         /* select thermal txpower adjustment params, based on channel group
2373          *   (same frequency group used for mimo txatten adjustment) */
2374         degrees_per_05db_num =
2375             tx_power_cmp_tble[txatten_grp].degrees_per_05db_a;
2376         degrees_per_05db_denom =
2377             tx_power_cmp_tble[txatten_grp].degrees_per_05db_a_denom;
2378
2379         /* get per-chain txpower values from factory measurements */
2380         for (c = 0; c < 2; c++) {
2381                 measurement = &ch_eeprom_info.measurements[c][1];
2382
2383                 /* txgain adjustment (in half-dB steps) based on difference
2384                  *   between factory and current temperature */
2385                 factory_temp = measurement->temperature;
2386                 iwl4965_math_div_round((current_temp - factory_temp) *
2387                                        degrees_per_05db_denom,
2388                                        degrees_per_05db_num,
2389                                        &temperature_comp[c]);
2390
2391                 factory_gain_index[c] = measurement->gain_idx;
2392                 factory_actual_pwr[c] = measurement->actual_pow;
2393
2394                 IWL_DEBUG_TXPOWER("chain = %d\n", c);
2395                 IWL_DEBUG_TXPOWER("fctry tmp %d, "
2396                                   "curr tmp %d, comp %d steps\n",
2397                                   factory_temp, current_temp,
2398                                   temperature_comp[c]);
2399
2400                 IWL_DEBUG_TXPOWER("fctry idx %d, fctry pwr %d\n",
2401                                   factory_gain_index[c],
2402                                   factory_actual_pwr[c]);
2403         }
2404
2405         /* for each of 33 bit-rates (including 1 for CCK) */
2406         for (i = 0; i < POWER_TABLE_NUM_ENTRIES; i++) {
2407                 u8 is_mimo_rate;
2408                 union iwl_tx_power_dual_stream tx_power;
2409
2410                 /* for mimo, reduce each chain's txpower by half
2411                  * (3dB, 6 steps), so total output power is regulatory
2412                  * compliant. */
2413                 if (i & 0x8) {
2414                         current_regulatory = reg_limit -
2415                             IWL_TX_POWER_MIMO_REGULATORY_COMPENSATION;
2416                         is_mimo_rate = 1;
2417                 } else {
2418                         current_regulatory = reg_limit;
2419                         is_mimo_rate = 0;
2420                 }
2421
2422                 /* find txpower limit, either hardware or regulatory */
2423                 power_limit = saturation_power - back_off_table[i];
2424                 if (power_limit > current_regulatory)
2425                         power_limit = current_regulatory;
2426
2427                 /* reduce user's txpower request if necessary
2428                  * for this rate on this channel */
2429                 target_power = user_target_power;
2430                 if (target_power > power_limit)
2431                         target_power = power_limit;
2432
2433                 IWL_DEBUG_TXPOWER("rate %d sat %d reg %d usr %d tgt %d\n",
2434                                   i, saturation_power - back_off_table[i],
2435                                   current_regulatory, user_target_power,
2436                                   target_power);
2437
2438                 /* for each of 2 Tx chains (radio transmitters) */
2439                 for (c = 0; c < 2; c++) {
2440                         s32 atten_value;
2441
2442                         if (is_mimo_rate)
2443                                 atten_value =
2444                                     (s32)le32_to_cpu(priv->card_alive_init.
2445                                     tx_atten[txatten_grp][c]);
2446                         else
2447                                 atten_value = 0;
2448
2449                         /* calculate index; higher index means lower txpower */
2450                         power_index = (u8) (factory_gain_index[c] -
2451                                             (target_power -
2452                                              factory_actual_pwr[c]) -
2453                                             temperature_comp[c] -
2454                                             voltage_compensation +
2455                                             atten_value);
2456
2457 /*                      IWL_DEBUG_TXPOWER("calculated txpower index %d\n",
2458                                                 power_index); */
2459
2460                         if (power_index < get_min_power_index(i, band))
2461                                 power_index = get_min_power_index(i, band);
2462
2463                         /* adjust 5 GHz index to support negative indexes */
2464                         if (!band)
2465                                 power_index += 9;
2466
2467                         /* CCK, rate 32, reduce txpower for CCK */
2468                         if (i == POWER_TABLE_CCK_ENTRY)
2469                                 power_index +=
2470                                     IWL_TX_POWER_CCK_COMPENSATION_C_STEP;
2471
2472                         /* stay within the table! */
2473                         if (power_index > 107) {
2474                                 IWL_WARNING("txpower index %d > 107\n",
2475                                             power_index);
2476                                 power_index = 107;
2477                         }
2478                         if (power_index < 0) {
2479                                 IWL_WARNING("txpower index %d < 0\n",
2480                                             power_index);
2481                                 power_index = 0;
2482                         }
2483
2484                         /* fill txpower command for this rate/chain */
2485                         tx_power.s.radio_tx_gain[c] =
2486                                 gain_table[band][power_index].radio;
2487                         tx_power.s.dsp_predis_atten[c] =
2488                                 gain_table[band][power_index].dsp;
2489
2490                         IWL_DEBUG_TXPOWER("chain %d mimo %d index %d "
2491                                           "gain 0x%02x dsp %d\n",
2492                                           c, atten_value, power_index,
2493                                         tx_power.s.radio_tx_gain[c],
2494                                         tx_power.s.dsp_predis_atten[c]);
2495                 }/* for each chain */
2496
2497                 tx_power_tbl->power_tbl[i].dw = cpu_to_le32(tx_power.dw);
2498
2499         }/* for each rate */
2500
2501         return 0;
2502 }
2503
2504 /**
2505  * iwl_hw_reg_send_txpower - Configure the TXPOWER level user limit
2506  *
2507  * Uses the active RXON for channel, band, and characteristics (fat, high)
2508  * The power limit is taken from priv->user_txpower_limit.
2509  */
2510 int iwl_hw_reg_send_txpower(struct iwl_priv *priv)
2511 {
2512         struct iwl_txpowertable_cmd cmd = { 0 };
2513         int rc = 0;
2514         u8 band = 0;
2515         u8 is_fat = 0;
2516         u8 ctrl_chan_high = 0;
2517
2518         if (test_bit(STATUS_SCANNING, &priv->status)) {
2519                 /* If this gets hit a lot, switch it to a BUG() and catch
2520                  * the stack trace to find out who is calling this during
2521                  * a scan. */
2522                 IWL_WARNING("TX Power requested while scanning!\n");
2523                 return -EAGAIN;
2524         }
2525
2526         band = ((priv->phymode == MODE_IEEE80211B) ||
2527                 (priv->phymode == MODE_IEEE80211G));
2528
2529         is_fat =  is_fat_channel(priv->active_rxon.flags);
2530
2531         if (is_fat &&
2532             (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
2533                 ctrl_chan_high = 1;
2534
2535         cmd.band = band;
2536         cmd.channel = priv->active_rxon.channel;
2537
2538         rc = iwl4965_fill_txpower_tbl(priv, band,
2539                                 le16_to_cpu(priv->active_rxon.channel),
2540                                 is_fat, ctrl_chan_high, &cmd.tx_power);
2541         if (rc)
2542                 return rc;
2543
2544         rc = iwl_send_cmd_pdu(priv, REPLY_TX_PWR_TABLE_CMD, sizeof(cmd), &cmd);
2545         return rc;
2546 }
2547
2548 int iwl_hw_channel_switch(struct iwl_priv *priv, u16 channel)
2549 {
2550         int rc;
2551         u8 band = 0;
2552         u8 is_fat = 0;
2553         u8 ctrl_chan_high = 0;
2554         struct iwl_channel_switch_cmd cmd = { 0 };
2555         const struct iwl_channel_info *ch_info;
2556
2557         band = ((priv->phymode == MODE_IEEE80211B) ||
2558                 (priv->phymode == MODE_IEEE80211G));
2559
2560         ch_info = iwl_get_channel_info(priv, priv->phymode, channel);
2561
2562         is_fat = is_fat_channel(priv->staging_rxon.flags);
2563
2564         if (is_fat &&
2565             (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
2566                 ctrl_chan_high = 1;
2567
2568         cmd.band = band;
2569         cmd.expect_beacon = 0;
2570         cmd.channel = cpu_to_le16(channel);
2571         cmd.rxon_flags = priv->active_rxon.flags;
2572         cmd.rxon_filter_flags = priv->active_rxon.filter_flags;
2573         cmd.switch_time = cpu_to_le32(priv->ucode_beacon_time);
2574         if (ch_info)
2575                 cmd.expect_beacon = is_channel_radar(ch_info);
2576         else
2577                 cmd.expect_beacon = 1;
2578
2579         rc = iwl4965_fill_txpower_tbl(priv, band, channel, is_fat,
2580                                       ctrl_chan_high, &cmd.tx_power);
2581         if (rc) {
2582                 IWL_DEBUG_11H("error:%d  fill txpower_tbl\n", rc);
2583                 return rc;
2584         }
2585
2586         rc = iwl_send_cmd_pdu(priv, REPLY_CHANNEL_SWITCH, sizeof(cmd), &cmd);
2587         return rc;
2588 }
2589
2590 #define RTS_HCCA_RETRY_LIMIT            3
2591 #define RTS_DFAULT_RETRY_LIMIT          60
2592
2593 void iwl_hw_build_tx_cmd_rate(struct iwl_priv *priv,
2594                               struct iwl_cmd *cmd,
2595                               struct ieee80211_tx_control *ctrl,
2596                               struct ieee80211_hdr *hdr, int sta_id,
2597                               int is_hcca)
2598 {
2599         u8 rate;
2600         u8 rts_retry_limit = 0;
2601         u8 data_retry_limit = 0;
2602         __le32 tx_flags;
2603         u16 fc = le16_to_cpu(hdr->frame_control);
2604
2605         tx_flags = cmd->cmd.tx.tx_flags;
2606
2607         rate = iwl_rates[ctrl->tx_rate].plcp;
2608
2609         rts_retry_limit = (is_hcca) ?
2610             RTS_HCCA_RETRY_LIMIT : RTS_DFAULT_RETRY_LIMIT;
2611
2612         if (ieee80211_is_probe_response(fc)) {
2613                 data_retry_limit = 3;
2614                 if (data_retry_limit < rts_retry_limit)
2615                         rts_retry_limit = data_retry_limit;
2616         } else
2617                 data_retry_limit = IWL_DEFAULT_TX_RETRY;
2618
2619         if (priv->data_retry_limit != -1)
2620                 data_retry_limit = priv->data_retry_limit;
2621
2622         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2623                 switch (fc & IEEE80211_FCTL_STYPE) {
2624                 case IEEE80211_STYPE_AUTH:
2625                 case IEEE80211_STYPE_DEAUTH:
2626                 case IEEE80211_STYPE_ASSOC_REQ:
2627                 case IEEE80211_STYPE_REASSOC_REQ:
2628                         if (tx_flags & TX_CMD_FLG_RTS_MSK) {
2629                                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2630                                 tx_flags |= TX_CMD_FLG_CTS_MSK;
2631                         }
2632                         break;
2633                 default:
2634                         break;
2635                 }
2636         }
2637
2638         cmd->cmd.tx.rts_retry_limit = rts_retry_limit;
2639         cmd->cmd.tx.data_retry_limit = data_retry_limit;
2640         cmd->cmd.tx.rate_n_flags = iwl_hw_set_rate_n_flags(rate, 0);
2641         cmd->cmd.tx.tx_flags = tx_flags;
2642 }
2643
2644 int iwl_hw_get_rx_read(struct iwl_priv *priv)
2645 {
2646         struct iwl_shared *shared_data = priv->hw_setting.shared_virt;
2647
2648         return IWL_GET_BITS(*shared_data, rb_closed_stts_rb_num);
2649 }
2650
2651 int iwl_hw_get_temperature(struct iwl_priv *priv)
2652 {
2653         return priv->temperature;
2654 }
2655
2656 unsigned int iwl_hw_get_beacon_cmd(struct iwl_priv *priv,
2657                           struct iwl_frame *frame, u8 rate)
2658 {
2659         struct iwl_tx_beacon_cmd *tx_beacon_cmd;
2660         unsigned int frame_size;
2661
2662         tx_beacon_cmd = &frame->u.beacon;
2663         memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
2664
2665         tx_beacon_cmd->tx.sta_id = IWL4965_BROADCAST_ID;
2666         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2667
2668         frame_size = iwl_fill_beacon_frame(priv,
2669                                 tx_beacon_cmd->frame,
2670                                 BROADCAST_ADDR,
2671                                 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
2672
2673         BUG_ON(frame_size > MAX_MPDU_SIZE);
2674         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
2675
2676         if ((rate == IWL_RATE_1M_PLCP) || (rate >= IWL_RATE_2M_PLCP))
2677                 tx_beacon_cmd->tx.rate_n_flags =
2678                         iwl_hw_set_rate_n_flags(rate, RATE_MCS_CCK_MSK);
2679         else
2680                 tx_beacon_cmd->tx.rate_n_flags =
2681                         iwl_hw_set_rate_n_flags(rate, 0);
2682
2683         tx_beacon_cmd->tx.tx_flags = (TX_CMD_FLG_SEQ_CTL_MSK |
2684                                 TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK);
2685         return (sizeof(*tx_beacon_cmd) + frame_size);
2686 }
2687
2688 int iwl_hw_tx_queue_init(struct iwl_priv *priv, struct iwl_tx_queue *txq)
2689 {
2690         int rc;
2691         unsigned long flags;
2692         int txq_id = txq->q.id;
2693
2694         spin_lock_irqsave(&priv->lock, flags);
2695         rc = iwl_grab_restricted_access(priv);
2696         if (rc) {
2697                 spin_unlock_irqrestore(&priv->lock, flags);
2698                 return rc;
2699         }
2700
2701         iwl_write_restricted(priv, FH_MEM_CBBC_QUEUE(txq_id),
2702                              txq->q.dma_addr >> 8);
2703         iwl_write_restricted(
2704                 priv, IWL_FH_TCSR_CHNL_TX_CONFIG_REG(txq_id),
2705                 IWL_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE |
2706                 IWL_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE_VAL);
2707         iwl_release_restricted_access(priv);
2708         spin_unlock_irqrestore(&priv->lock, flags);
2709
2710         return 0;
2711 }
2712
2713 static inline u8 iwl4965_get_dma_hi_address(dma_addr_t addr)
2714 {
2715         return sizeof(addr) > sizeof(u32) ? (addr >> 16) >> 16 : 0;
2716 }
2717
2718 int iwl_hw_txq_attach_buf_to_tfd(struct iwl_priv *priv, void *ptr,
2719                                  dma_addr_t addr, u16 len)
2720 {
2721         int index, is_odd;
2722         struct iwl_tfd_frame *tfd = ptr;
2723         u32 num_tbs = IWL_GET_BITS(*tfd, num_tbs);
2724
2725         if ((num_tbs >= MAX_NUM_OF_TBS) || (num_tbs < 0)) {
2726                 IWL_ERROR("Error can not send more than %d chunks\n",
2727                           MAX_NUM_OF_TBS);
2728                 return -EINVAL;
2729         }
2730
2731         index = num_tbs / 2;
2732         is_odd = num_tbs & 0x1;
2733
2734         if (!is_odd) {
2735                 tfd->pa[index].tb1_addr = cpu_to_le32(addr);
2736                 IWL_SET_BITS(tfd->pa[index], tb1_addr_hi,
2737                              iwl4965_get_dma_hi_address(addr));
2738                 IWL_SET_BITS(tfd->pa[index], tb1_len, len);
2739         } else {
2740                 IWL_SET_BITS(tfd->pa[index], tb2_addr_lo16,
2741                              (u32) (addr & 0xffff));
2742                 IWL_SET_BITS(tfd->pa[index], tb2_addr_hi20, addr >> 16);
2743                 IWL_SET_BITS(tfd->pa[index], tb2_len, len);
2744         }
2745
2746         IWL_SET_BITS(*tfd, num_tbs, num_tbs + 1);
2747
2748         return 0;
2749 }
2750
2751 void iwl_hw_card_show_info(struct iwl_priv *priv)
2752 {
2753         u16 hw_version = priv->eeprom.board_revision_4965;
2754
2755         IWL_DEBUG_INFO("4965ABGN HW Version %u.%u.%u\n",
2756                        ((hw_version >> 8) & 0x0F),
2757                        ((hw_version >> 8) >> 4), (hw_version & 0x00FF));
2758
2759         IWL_DEBUG_INFO("4965ABGN PBA Number %.16s\n",
2760                        priv->eeprom.board_pba_number_4965);
2761 }
2762
2763 #define IWL_TX_CRC_SIZE         4
2764 #define IWL_TX_DELIMITER_SIZE   4
2765
2766 int iwl4965_tx_queue_update_wr_ptr(struct iwl_priv *priv,
2767                                    struct iwl_tx_queue *txq, u16 byte_cnt)
2768 {
2769         int len;
2770         int txq_id = txq->q.id;
2771         struct iwl_shared *shared_data = priv->hw_setting.shared_virt;
2772
2773         if (txq->need_update == 0)
2774                 return 0;
2775
2776         len = byte_cnt + IWL_TX_CRC_SIZE + IWL_TX_DELIMITER_SIZE;
2777
2778         IWL_SET_BITS16(shared_data->queues_byte_cnt_tbls[txq_id].
2779                        tfd_offset[txq->q.first_empty], byte_cnt, len);
2780
2781         if (txq->q.first_empty < IWL4965_MAX_WIN_SIZE)
2782                 IWL_SET_BITS16(shared_data->queues_byte_cnt_tbls[txq_id].
2783                         tfd_offset[IWL4965_QUEUE_SIZE + txq->q.first_empty],
2784                         byte_cnt, len);
2785
2786         return 0;
2787 }
2788
2789 /* Set up Rx receiver/antenna/chain usage in "staging" RXON image.
2790  * This should not be used for scan command ... it puts data in wrong place.  */
2791 void iwl4965_set_rxon_chain(struct iwl_priv *priv)
2792 {
2793         u8 is_single = is_single_stream(priv);
2794         u8 idle_state, rx_state;
2795
2796         priv->staging_rxon.rx_chain = 0;
2797         rx_state = idle_state = 3;
2798
2799         /* Tell uCode which antennas are actually connected.
2800          * Before first association, we assume all antennas are connected.
2801          * Just after first association, iwl4965_noise_calibration()
2802          *    checks which antennas actually *are* connected. */
2803         priv->staging_rxon.rx_chain |=
2804             cpu_to_le16(priv->valid_antenna << RXON_RX_CHAIN_VALID_POS);
2805
2806         /* How many receivers should we use? */
2807         iwl4965_get_rx_chain_counter(priv, &idle_state, &rx_state);
2808         priv->staging_rxon.rx_chain |=
2809                 cpu_to_le16(rx_state << RXON_RX_CHAIN_MIMO_CNT_POS);
2810         priv->staging_rxon.rx_chain |=
2811                 cpu_to_le16(idle_state << RXON_RX_CHAIN_CNT_POS);
2812
2813         if (!is_single && (rx_state >= 2) &&
2814             !test_bit(STATUS_POWER_PMI, &priv->status))
2815                 priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
2816         else
2817                 priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
2818
2819         IWL_DEBUG_ASSOC("rx chain %X\n", priv->staging_rxon.rx_chain);
2820 }
2821
2822 #ifdef CONFIG_IWLWIFI_HT
2823 #ifdef CONFIG_IWLWIFI_HT_AGG
2824 /*
2825         get the traffic load value for tid
2826 */
2827 static u32 iwl4965_tl_get_load(struct iwl_priv *priv, u8 tid)
2828 {
2829         u32 load = 0;
2830         u32 current_time = jiffies_to_msecs(jiffies);
2831         u32 time_diff;
2832         s32 index;
2833         unsigned long flags;
2834         struct iwl_traffic_load *tid_ptr = NULL;
2835
2836         if (tid >= TID_MAX_LOAD_COUNT)
2837                 return 0;
2838
2839         tid_ptr = &(priv->lq_mngr.agg_ctrl.traffic_load[tid]);
2840
2841         current_time -= current_time % TID_ROUND_VALUE;
2842
2843         spin_lock_irqsave(&priv->lq_mngr.lock, flags);
2844         if (!(tid_ptr->queue_count))
2845                 goto out;
2846
2847         time_diff = TIME_WRAP_AROUND(tid_ptr->time_stamp, current_time);
2848         index = time_diff / TID_QUEUE_CELL_SPACING;
2849
2850         if (index >= TID_QUEUE_MAX_SIZE) {
2851                 u32 oldest_time = current_time - TID_MAX_TIME_DIFF;
2852
2853                 while (tid_ptr->queue_count &&
2854                        (tid_ptr->time_stamp < oldest_time)) {
2855                         tid_ptr->total -= tid_ptr->packet_count[tid_ptr->head];
2856                         tid_ptr->packet_count[tid_ptr->head] = 0;
2857                         tid_ptr->time_stamp += TID_QUEUE_CELL_SPACING;
2858                         tid_ptr->queue_count--;
2859                         tid_ptr->head++;
2860                         if (tid_ptr->head >= TID_QUEUE_MAX_SIZE)
2861                                 tid_ptr->head = 0;
2862                 }
2863         }
2864         load = tid_ptr->total;
2865
2866  out:
2867         spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
2868         return load;
2869 }
2870
2871 /*
2872         increment traffic load value for tid and also remove
2873         any old values if passed the certian time period
2874 */
2875 static void iwl4965_tl_add_packet(struct iwl_priv *priv, u8 tid)
2876 {
2877         u32 current_time = jiffies_to_msecs(jiffies);
2878         u32 time_diff;
2879         s32 index;
2880         unsigned long flags;
2881         struct iwl_traffic_load *tid_ptr = NULL;
2882
2883         if (tid >= TID_MAX_LOAD_COUNT)
2884                 return;
2885
2886         tid_ptr = &(priv->lq_mngr.agg_ctrl.traffic_load[tid]);
2887
2888         current_time -= current_time % TID_ROUND_VALUE;
2889
2890         spin_lock_irqsave(&priv->lq_mngr.lock, flags);
2891         if (!(tid_ptr->queue_count)) {
2892                 tid_ptr->total = 1;
2893                 tid_ptr->time_stamp = current_time;
2894                 tid_ptr->queue_count = 1;
2895                 tid_ptr->head = 0;
2896                 tid_ptr->packet_count[0] = 1;
2897                 goto out;
2898         }
2899
2900         time_diff = TIME_WRAP_AROUND(tid_ptr->time_stamp, current_time);
2901         index = time_diff / TID_QUEUE_CELL_SPACING;
2902
2903         if (index >= TID_QUEUE_MAX_SIZE) {
2904                 u32 oldest_time = current_time - TID_MAX_TIME_DIFF;
2905
2906                 while (tid_ptr->queue_count &&
2907                        (tid_ptr->time_stamp < oldest_time)) {
2908                         tid_ptr->total -= tid_ptr->packet_count[tid_ptr->head];
2909                         tid_ptr->packet_count[tid_ptr->head] = 0;
2910                         tid_ptr->time_stamp += TID_QUEUE_CELL_SPACING;
2911                         tid_ptr->queue_count--;
2912                         tid_ptr->head++;
2913                         if (tid_ptr->head >= TID_QUEUE_MAX_SIZE)
2914                                 tid_ptr->head = 0;
2915                 }
2916         }
2917
2918         index = (tid_ptr->head + index) % TID_QUEUE_MAX_SIZE;
2919         tid_ptr->packet_count[index] = tid_ptr->packet_count[index] + 1;
2920         tid_ptr->total = tid_ptr->total + 1;
2921
2922         if ((index + 1) > tid_ptr->queue_count)
2923                 tid_ptr->queue_count = index + 1;
2924  out:
2925         spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
2926
2927 }
2928
2929 #define MMAC_SCHED_MAX_NUMBER_OF_HT_BACK_FLOWS   7
2930 enum HT_STATUS {
2931         BA_STATUS_FAILURE = 0,
2932         BA_STATUS_INITIATOR_DELBA,
2933         BA_STATUS_RECIPIENT_DELBA,
2934         BA_STATUS_RENEW_ADDBA_REQUEST,
2935         BA_STATUS_ACTIVE,
2936 };
2937
2938 static u8 iwl4964_tl_ba_avail(struct iwl_priv *priv)
2939 {
2940         int i;
2941         struct iwl_lq_mngr *lq;
2942         u8 count = 0;
2943         u16 msk;
2944
2945         lq = (struct iwl_lq_mngr *)&(priv->lq_mngr);
2946         for (i = 0; i < TID_MAX_LOAD_COUNT ; i++) {
2947                 msk = 1 << i;
2948                 if ((lq->agg_ctrl.granted_ba & msk) ||
2949                     (lq->agg_ctrl.wait_for_agg_status & msk))
2950                         count++;
2951         }
2952
2953         if (count < MMAC_SCHED_MAX_NUMBER_OF_HT_BACK_FLOWS)
2954                 return 1;
2955
2956         return 0;
2957 }
2958
2959 static void iwl4965_ba_status(struct iwl_priv *priv,
2960                               u8 tid, enum HT_STATUS status);
2961
2962 static int iwl4965_perform_addba(struct iwl_priv *priv, u8 tid, u32 length,
2963                                  u32 ba_timeout)
2964 {
2965         int rc;
2966
2967         rc = ieee80211_start_BA_session(priv->hw, priv->bssid, tid);
2968         if (rc)
2969                 iwl4965_ba_status(priv, tid, BA_STATUS_FAILURE);
2970
2971         return rc;
2972 }
2973
2974 static int iwl4965_perform_delba(struct iwl_priv *priv, u8 tid)
2975 {
2976         int rc;
2977
2978         rc = ieee80211_stop_BA_session(priv->hw, priv->bssid, tid);
2979         if (rc)
2980                 iwl4965_ba_status(priv, tid, BA_STATUS_FAILURE);
2981
2982         return rc;
2983 }
2984
2985 static void iwl4965_turn_on_agg_for_tid(struct iwl_priv *priv,
2986                                         struct iwl_lq_mngr *lq,
2987                                         u8 auto_agg, u8 tid)
2988 {
2989         u32 tid_msk = (1 << tid);
2990         unsigned long flags;
2991
2992         spin_lock_irqsave(&priv->lq_mngr.lock, flags);
2993 /*
2994         if ((auto_agg) && (!lq->enable_counter)){
2995                 lq->agg_ctrl.next_retry = 0;
2996                 lq->agg_ctrl.tid_retry = 0;
2997                 spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
2998                 return;
2999         }
3000 */
3001         if (!(lq->agg_ctrl.granted_ba & tid_msk) &&
3002             (lq->agg_ctrl.requested_ba & tid_msk)) {
3003                 u8 available_queues;
3004                 u32 load;
3005
3006                 spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3007                 available_queues = iwl4964_tl_ba_avail(priv);
3008                 load = iwl4965_tl_get_load(priv, tid);
3009
3010                 spin_lock_irqsave(&priv->lq_mngr.lock, flags);
3011                 if (!available_queues) {
3012                         if (auto_agg)
3013                                 lq->agg_ctrl.tid_retry |= tid_msk;
3014                         else {
3015                                 lq->agg_ctrl.requested_ba &= ~tid_msk;
3016                                 lq->agg_ctrl.wait_for_agg_status &= ~tid_msk;
3017                         }
3018                 } else if ((auto_agg) &&
3019                            ((load <= lq->agg_ctrl.tid_traffic_load_threshold) ||
3020                             ((lq->agg_ctrl.wait_for_agg_status & tid_msk))))
3021                         lq->agg_ctrl.tid_retry |= tid_msk;
3022                 else {
3023                         lq->agg_ctrl.wait_for_agg_status |= tid_msk;
3024                         spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3025                         iwl4965_perform_addba(priv, tid, 0x40,
3026                                               lq->agg_ctrl.ba_timeout);
3027                         spin_lock_irqsave(&priv->lq_mngr.lock, flags);
3028                 }
3029         }
3030         spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3031 }
3032
3033 static void iwl4965_turn_on_agg(struct iwl_priv *priv, u8 tid)
3034 {
3035         struct iwl_lq_mngr *lq;
3036         unsigned long flags;
3037
3038         lq = (struct iwl_lq_mngr *)&(priv->lq_mngr);
3039
3040         if ((tid < TID_MAX_LOAD_COUNT))
3041                 iwl4965_turn_on_agg_for_tid(priv, lq, lq->agg_ctrl.auto_agg,
3042                                             tid);
3043         else if (tid == TID_ALL_SPECIFIED) {
3044                 if (lq->agg_ctrl.requested_ba) {
3045                         for (tid = 0; tid < TID_MAX_LOAD_COUNT; tid++)
3046                                 iwl4965_turn_on_agg_for_tid(priv, lq,
3047                                         lq->agg_ctrl.auto_agg, tid);
3048                 } else {
3049                         spin_lock_irqsave(&priv->lq_mngr.lock, flags);
3050                         lq->agg_ctrl.tid_retry = 0;
3051                         lq->agg_ctrl.next_retry = 0;
3052                         spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3053                 }
3054         }
3055
3056 }
3057
3058 void iwl4965_turn_off_agg(struct iwl_priv *priv, u8 tid)
3059 {
3060         u32 tid_msk;
3061         struct iwl_lq_mngr *lq;
3062         unsigned long flags;
3063
3064         lq = (struct iwl_lq_mngr *)&(priv->lq_mngr);
3065
3066         if ((tid < TID_MAX_LOAD_COUNT)) {
3067                 tid_msk = 1 << tid;
3068                 spin_lock_irqsave(&priv->lq_mngr.lock, flags);
3069                 lq->agg_ctrl.wait_for_agg_status |= tid_msk;
3070                 lq->agg_ctrl.requested_ba &= ~tid_msk;
3071                 spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3072                 iwl4965_perform_delba(priv, tid);
3073         } else if (tid == TID_ALL_SPECIFIED) {
3074                 spin_lock_irqsave(&priv->lq_mngr.lock, flags);
3075                 for (tid = 0; tid < TID_MAX_LOAD_COUNT; tid++) {
3076                         tid_msk = 1 << tid;
3077                         lq->agg_ctrl.wait_for_agg_status |= tid_msk;
3078                         spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3079                         iwl4965_perform_delba(priv, tid);
3080                         spin_lock_irqsave(&priv->lq_mngr.lock, flags);
3081                 }
3082                 lq->agg_ctrl.requested_ba = 0;
3083                 spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3084         }
3085 }
3086
3087 static void iwl4965_ba_status(struct iwl_priv *priv,
3088                                 u8 tid, enum HT_STATUS status)
3089 {
3090         struct iwl_lq_mngr *lq;
3091         u32 tid_msk = (1 << tid);
3092         unsigned long flags;
3093
3094         lq = (struct iwl_lq_mngr *)&(priv->lq_mngr);
3095
3096         if ((tid >= TID_MAX_LOAD_COUNT))
3097                 goto out;
3098
3099         spin_lock_irqsave(&priv->lq_mngr.lock, flags);
3100         switch (status) {
3101         case BA_STATUS_ACTIVE:
3102                 if (!(lq->agg_ctrl.granted_ba & tid_msk))
3103                         lq->agg_ctrl.granted_ba |= tid_msk;
3104                 break;
3105         default:
3106                 if ((lq->agg_ctrl.granted_ba & tid_msk))
3107                         lq->agg_ctrl.granted_ba &= ~tid_msk;
3108                 break;
3109         }
3110
3111         lq->agg_ctrl.wait_for_agg_status &= ~tid_msk;
3112         if (status != BA_STATUS_ACTIVE) {
3113                 if (lq->agg_ctrl.auto_agg) {
3114                         lq->agg_ctrl.tid_retry |= tid_msk;
3115                         lq->agg_ctrl.next_retry =
3116                             jiffies + msecs_to_jiffies(500);
3117                 } else
3118                         lq->agg_ctrl.requested_ba &= ~tid_msk;
3119         }
3120         spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3121  out:
3122         return;
3123 }
3124
3125 static void iwl4965_bg_agg_work(struct work_struct *work)
3126 {
3127         struct iwl_priv *priv = container_of(work, struct iwl_priv,
3128                                         agg_work);
3129
3130         u32 tid;
3131         u32 retry_tid;
3132         u32 tid_msk;
3133         unsigned long flags;
3134         struct iwl_lq_mngr *lq = (struct iwl_lq_mngr *)&(priv->lq_mngr);
3135
3136         spin_lock_irqsave(&priv->lq_mngr.lock, flags);
3137         retry_tid = lq->agg_ctrl.tid_retry;
3138         lq->agg_ctrl.tid_retry = 0;
3139         spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3140
3141         if (retry_tid == TID_ALL_SPECIFIED)
3142                 iwl4965_turn_on_agg(priv, TID_ALL_SPECIFIED);
3143         else {
3144                 for (tid = 0; tid < TID_MAX_LOAD_COUNT; tid++) {
3145                         tid_msk = (1 << tid);
3146                         if (retry_tid & tid_msk)
3147                                 iwl4965_turn_on_agg(priv, tid);
3148                 }
3149         }
3150
3151         spin_lock_irqsave(&priv->lq_mngr.lock, flags);
3152         if (lq->agg_ctrl.tid_retry)
3153                 lq->agg_ctrl.next_retry = jiffies + msecs_to_jiffies(500);
3154         spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3155         return;
3156 }
3157 #endif /*CONFIG_IWLWIFI_HT_AGG */
3158 #endif /* CONFIG_IWLWIFI_HT */
3159
3160 int iwl4965_tx_cmd(struct iwl_priv *priv, struct iwl_cmd *out_cmd,
3161                    u8 sta_id, dma_addr_t txcmd_phys,
3162                    struct ieee80211_hdr *hdr, u8 hdr_len,
3163                    struct ieee80211_tx_control *ctrl, void *sta_in)
3164 {
3165         struct iwl_tx_cmd cmd;
3166         struct iwl_tx_cmd *tx = (struct iwl_tx_cmd *)&out_cmd->cmd.payload[0];
3167         dma_addr_t scratch_phys;
3168         u8 unicast = 0;
3169         u8 is_data = 1;
3170         u16 fc;
3171         u16 rate_flags;
3172         int rate_index = min(ctrl->tx_rate & 0xffff, IWL_RATE_COUNT - 1);
3173 #ifdef CONFIG_IWLWIFI_HT
3174 #ifdef CONFIG_IWLWIFI_HT_AGG
3175         __le16 *qc;
3176 #endif /*CONFIG_IWLWIFI_HT_AGG */
3177 #endif /* CONFIG_IWLWIFI_HT */
3178
3179         unicast = !is_multicast_ether_addr(hdr->addr1);
3180
3181         fc = le16_to_cpu(hdr->frame_control);
3182         if ((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA)
3183                 is_data = 0;
3184
3185         memcpy(&cmd, &(out_cmd->cmd.tx), sizeof(struct iwl_tx_cmd));
3186         memset(tx, 0, sizeof(struct iwl_tx_cmd));
3187         memcpy(tx->hdr, hdr, hdr_len);
3188
3189         tx->len = cmd.len;
3190         tx->driver_txop = cmd.driver_txop;
3191         tx->stop_time.life_time = cmd.stop_time.life_time;
3192         tx->tx_flags = cmd.tx_flags;
3193         tx->sta_id = cmd.sta_id;
3194         tx->tid_tspec = cmd.tid_tspec;
3195         tx->timeout.pm_frame_timeout = cmd.timeout.pm_frame_timeout;
3196         tx->next_frame_len = cmd.next_frame_len;
3197
3198         tx->sec_ctl = cmd.sec_ctl;
3199         memcpy(&(tx->key[0]), &(cmd.key[0]), 16);
3200         tx->tx_flags = cmd.tx_flags;
3201
3202         tx->rts_retry_limit = cmd.rts_retry_limit;
3203         tx->data_retry_limit = cmd.data_retry_limit;
3204
3205         scratch_phys = txcmd_phys + sizeof(struct iwl_cmd_header) +
3206             offsetof(struct iwl_tx_cmd, scratch);
3207         tx->dram_lsb_ptr = cpu_to_le32(scratch_phys);
3208         tx->dram_msb_ptr = iwl4965_get_dma_hi_address(scratch_phys);
3209
3210         /* Hard coded to start at the highest retry fallback position
3211          * until the 4965 specific rate control algorithm is tied in */
3212         tx->initial_rate_index = LINK_QUAL_MAX_RETRY_NUM - 1;
3213
3214         /* Alternate between antenna A and B for successive frames */
3215         if (priv->use_ant_b_for_management_frame) {
3216                 priv->use_ant_b_for_management_frame = 0;
3217                 rate_flags = RATE_MCS_ANT_B_MSK;
3218         } else {
3219                 priv->use_ant_b_for_management_frame = 1;
3220                 rate_flags = RATE_MCS_ANT_A_MSK;
3221         }
3222
3223         if (!unicast || !is_data) {
3224                 if ((rate_index >= IWL_FIRST_CCK_RATE) &&
3225                     (rate_index <= IWL_LAST_CCK_RATE))
3226                         rate_flags |= RATE_MCS_CCK_MSK;
3227         } else {
3228                 tx->initial_rate_index = 0;
3229                 tx->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
3230         }
3231
3232         tx->rate_n_flags = iwl_hw_set_rate_n_flags(iwl_rates[rate_index].plcp,
3233                                                 rate_flags);
3234
3235         if (ieee80211_is_back_request(fc))
3236                 tx->tx_flags |= TX_CMD_FLG_ACK_MSK |
3237                         TX_CMD_FLG_IMM_BA_RSP_MASK;
3238 #ifdef CONFIG_IWLWIFI_HT
3239 #ifdef CONFIG_IWLWIFI_HT_AGG
3240         qc = ieee80211_get_qos_ctrl(hdr);
3241         if (qc &&
3242             (priv->iw_mode != IEEE80211_IF_TYPE_IBSS)) {
3243                 u8 tid = 0;
3244                 tid = (u8) (le16_to_cpu(*qc) & 0xF);
3245                 if (tid < TID_MAX_LOAD_COUNT)
3246                         iwl4965_tl_add_packet(priv, tid);
3247         }
3248
3249         if (priv->lq_mngr.agg_ctrl.next_retry &&
3250             (time_after(priv->lq_mngr.agg_ctrl.next_retry, jiffies))) {
3251                 unsigned long flags;
3252
3253                 spin_lock_irqsave(&priv->lq_mngr.lock, flags);
3254                 priv->lq_mngr.agg_ctrl.next_retry = 0;
3255                 spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3256                 schedule_work(&priv->agg_work);
3257         }
3258 #endif
3259 #endif
3260         return 0;
3261 }
3262
3263 /**
3264  * sign_extend - Sign extend a value using specified bit as sign-bit
3265  *
3266  * Example: sign_extend(9, 3) would return -7 as bit3 of 1001b is 1
3267  * and bit0..2 is 001b which when sign extended to 1111111111111001b is -7.
3268  *
3269  * @param oper value to sign extend
3270  * @param index 0 based bit index (0<=index<32) to sign bit
3271  */
3272 static s32 sign_extend(u32 oper, int index)
3273 {
3274         u8 shift = 31 - index;
3275
3276         return (s32)(oper << shift) >> shift;
3277 }
3278
3279 /**
3280  * iwl4965_get_temperature - return the calibrated temperature (in Kelvin)
3281  * @statistics: Provides the temperature reading from the uCode
3282  *
3283  * A return of <0 indicates bogus data in the statistics
3284  */
3285 int iwl4965_get_temperature(const struct iwl_priv *priv)
3286 {
3287         s32 temperature;
3288         s32 vt;
3289         s32 R1, R2, R3;
3290         u32 R4;
3291
3292         if (test_bit(STATUS_TEMPERATURE, &priv->status) &&
3293                 (priv->statistics.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK)) {
3294                 IWL_DEBUG_TEMP("Running FAT temperature calibration\n");
3295                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[1]);
3296                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[1]);
3297                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[1]);
3298                 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[1]);
3299         } else {
3300                 IWL_DEBUG_TEMP("Running temperature calibration\n");
3301                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[0]);
3302                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[0]);
3303                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[0]);
3304                 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[0]);
3305         }
3306
3307         /*
3308          * Temperature is only 23 bits so sign extend out to 32
3309          *
3310          * NOTE If we haven't received a statistics notification yet
3311          * with an updated temperature, use R4 provided to us in the
3312          * ALIVE response. */
3313         if (!test_bit(STATUS_TEMPERATURE, &priv->status))
3314                 vt = sign_extend(R4, 23);
3315         else
3316                 vt = sign_extend(
3317                         le32_to_cpu(priv->statistics.general.temperature), 23);
3318
3319         IWL_DEBUG_TEMP("Calib values R[1-3]: %d %d %d R4: %d\n",
3320                        R1, R2, R3, vt);
3321
3322         if (R3 == R1) {
3323                 IWL_ERROR("Calibration conflict R1 == R3\n");
3324                 return -1;
3325         }
3326
3327         /* Calculate temperature in degrees Kelvin, adjust by 97%.
3328          * Add offset to center the adjustment around 0 degrees Centigrade. */
3329         temperature = TEMPERATURE_CALIB_A_VAL * (vt - R2);
3330         temperature /= (R3 - R1);
3331         temperature = (temperature * 97) / 100 +
3332             TEMPERATURE_CALIB_KELVIN_OFFSET;
3333
3334         IWL_DEBUG_TEMP("Calibrated temperature: %dK, %dC\n", temperature,
3335             KELVIN_TO_CELSIUS(temperature));
3336
3337         return temperature;
3338 }
3339
3340 /* Adjust Txpower only if temperature variance is greater than threshold. */
3341 #define IWL_TEMPERATURE_THRESHOLD   3
3342
3343 /**
3344  * iwl4965_is_temp_calib_needed - determines if new calibration is needed
3345  *
3346  * If the temperature changed has changed sufficiently, then a recalibration
3347  * is needed.
3348  *
3349  * Assumes caller will replace priv->last_temperature once calibration
3350  * executed.
3351  */
3352 static int iwl4965_is_temp_calib_needed(struct iwl_priv *priv)
3353 {
3354         int temp_diff;
3355
3356         if (!test_bit(STATUS_STATISTICS, &priv->status)) {
3357                 IWL_DEBUG_TEMP("Temperature not updated -- no statistics.\n");
3358                 return 0;
3359         }
3360
3361         temp_diff = priv->temperature - priv->last_temperature;
3362
3363         /* get absolute value */
3364         if (temp_diff < 0) {
3365                 IWL_DEBUG_POWER("Getting cooler, delta %d, \n", temp_diff);
3366                 temp_diff = -temp_diff;
3367         } else if (temp_diff == 0)
3368                 IWL_DEBUG_POWER("Same temp, \n");
3369         else
3370                 IWL_DEBUG_POWER("Getting warmer, delta %d, \n", temp_diff);
3371
3372         if (temp_diff < IWL_TEMPERATURE_THRESHOLD) {
3373                 IWL_DEBUG_POWER("Thermal txpower calib not needed\n");
3374                 return 0;
3375         }
3376
3377         IWL_DEBUG_POWER("Thermal txpower calib needed\n");
3378
3379         return 1;
3380 }
3381
3382 /* Calculate noise level, based on measurements during network silence just
3383  *   before arriving beacon.  This measurement can be done only if we know
3384  *   exactly when to expect beacons, therefore only when we're associated. */
3385 static void iwl4965_rx_calc_noise(struct iwl_priv *priv)
3386 {
3387         struct statistics_rx_non_phy *rx_info
3388                                 = &(priv->statistics.rx.general);
3389         int num_active_rx = 0;
3390         int total_silence = 0;
3391         int bcn_silence_a =
3392                 le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER;
3393         int bcn_silence_b =
3394                 le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER;
3395         int bcn_silence_c =
3396                 le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER;
3397
3398         if (bcn_silence_a) {
3399                 total_silence += bcn_silence_a;
3400                 num_active_rx++;
3401         }
3402         if (bcn_silence_b) {
3403                 total_silence += bcn_silence_b;
3404                 num_active_rx++;
3405         }
3406         if (bcn_silence_c) {
3407                 total_silence += bcn_silence_c;
3408                 num_active_rx++;
3409         }
3410
3411         /* Average among active antennas */
3412         if (num_active_rx)
3413                 priv->last_rx_noise = (total_silence / num_active_rx) - 107;
3414         else
3415                 priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
3416
3417         IWL_DEBUG_CALIB("inband silence a %u, b %u, c %u, dBm %d\n",
3418                         bcn_silence_a, bcn_silence_b, bcn_silence_c,
3419                         priv->last_rx_noise);
3420 }
3421
3422 void iwl_hw_rx_statistics(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
3423 {
3424         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3425         int change;
3426         s32 temp;
3427
3428         IWL_DEBUG_RX("Statistics notification received (%d vs %d).\n",
3429                      (int)sizeof(priv->statistics), pkt->len);
3430
3431         change = ((priv->statistics.general.temperature !=
3432                    pkt->u.stats.general.temperature) ||
3433                   ((priv->statistics.flag &
3434                     STATISTICS_REPLY_FLG_FAT_MODE_MSK) !=
3435                    (pkt->u.stats.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK)));
3436
3437         memcpy(&priv->statistics, &pkt->u.stats, sizeof(priv->statistics));
3438
3439         set_bit(STATUS_STATISTICS, &priv->status);
3440
3441         /* Reschedule the statistics timer to occur in
3442          * REG_RECALIB_PERIOD seconds to ensure we get a
3443          * thermal update even if the uCode doesn't give
3444          * us one */
3445         mod_timer(&priv->statistics_periodic, jiffies +
3446                   msecs_to_jiffies(REG_RECALIB_PERIOD * 1000));
3447
3448         if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
3449             (pkt->hdr.cmd == STATISTICS_NOTIFICATION)) {
3450                 iwl4965_rx_calc_noise(priv);
3451 #ifdef CONFIG_IWLWIFI_SENSITIVITY
3452                 queue_work(priv->workqueue, &priv->sensitivity_work);
3453 #endif
3454         }
3455
3456         /* If the hardware hasn't reported a change in
3457          * temperature then don't bother computing a
3458          * calibrated temperature value */
3459         if (!change)
3460                 return;
3461
3462         temp = iwl4965_get_temperature(priv);
3463         if (temp < 0)
3464                 return;
3465
3466         if (priv->temperature != temp) {
3467                 if (priv->temperature)
3468                         IWL_DEBUG_TEMP("Temperature changed "
3469                                        "from %dC to %dC\n",
3470                                        KELVIN_TO_CELSIUS(priv->temperature),
3471                                        KELVIN_TO_CELSIUS(temp));
3472                 else
3473                         IWL_DEBUG_TEMP("Temperature "
3474                                        "initialized to %dC\n",
3475                                        KELVIN_TO_CELSIUS(temp));
3476         }
3477
3478         priv->temperature = temp;
3479         set_bit(STATUS_TEMPERATURE, &priv->status);
3480
3481         if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
3482                      iwl4965_is_temp_calib_needed(priv))
3483                 queue_work(priv->workqueue, &priv->txpower_work);
3484 }
3485
3486 static void iwl4965_handle_data_packet(struct iwl_priv *priv, int is_data,
3487                                        int include_phy,
3488                                        struct iwl_rx_mem_buffer *rxb,
3489                                        struct ieee80211_rx_status *stats)
3490 {
3491         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
3492         struct iwl4965_rx_phy_res *rx_start = (include_phy) ?
3493             (struct iwl4965_rx_phy_res *)&(pkt->u.raw[0]) : NULL;
3494         struct ieee80211_hdr *hdr;
3495         u16 len;
3496         __le32 *rx_end;
3497         unsigned int skblen;
3498         u32 ampdu_status;
3499
3500         if (!include_phy && priv->last_phy_res[0])
3501                 rx_start = (struct iwl4965_rx_phy_res *)&priv->last_phy_res[1];
3502
3503         if (!rx_start) {
3504                 IWL_ERROR("MPDU frame without a PHY data\n");
3505                 return;
3506         }
3507         if (include_phy) {
3508                 hdr = (struct ieee80211_hdr *)((u8 *) & rx_start[1] +
3509                                                rx_start->cfg_phy_cnt);
3510
3511                 len = le16_to_cpu(rx_start->byte_count);
3512
3513                 rx_end = (__le32 *) ((u8 *) & pkt->u.raw[0] +
3514                                   sizeof(struct iwl4965_rx_phy_res) +
3515                                   rx_start->cfg_phy_cnt + len);
3516
3517         } else {
3518                 struct iwl4965_rx_mpdu_res_start *amsdu =
3519                     (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw;
3520
3521                 hdr = (struct ieee80211_hdr *)(pkt->u.raw +
3522                                sizeof(struct iwl4965_rx_mpdu_res_start));
3523                 len =  le16_to_cpu(amsdu->byte_count);
3524                 rx_start->byte_count = amsdu->byte_count;
3525                 rx_end = (__le32 *) (((u8 *) hdr) + len);
3526         }
3527         if (len > 2342 || len < 16) {
3528                 IWL_DEBUG_DROP("byte count out of range [16,2342]"
3529                                " : %d\n", len);
3530                 return;
3531         }
3532
3533         ampdu_status = le32_to_cpu(*rx_end);
3534         skblen = ((u8 *) rx_end - (u8 *) & pkt->u.raw[0]) + sizeof(u32);
3535
3536         /* start from MAC */
3537         skb_reserve(rxb->skb, (void *)hdr - (void *)pkt);
3538         skb_put(rxb->skb, len); /* end where data ends */
3539
3540         /* We only process data packets if the interface is open */
3541         if (unlikely(!priv->is_open)) {
3542                 IWL_DEBUG_DROP_LIMIT
3543                     ("Dropping packet while interface is not open.\n");
3544                 return;
3545         }
3546
3547         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
3548                 if (iwl_param_hwcrypto)
3549                         iwl_set_decrypted_flag(priv, rxb->skb,
3550                                                ampdu_status, stats);
3551                 iwl_handle_data_packet_monitor(priv, rxb, hdr, len, stats, 0);
3552                 return;
3553         }
3554
3555         stats->flag = 0;
3556         hdr = (struct ieee80211_hdr *)rxb->skb->data;
3557
3558         if (iwl_param_hwcrypto)
3559                 iwl_set_decrypted_flag(priv, rxb->skb, ampdu_status, stats);
3560
3561         ieee80211_rx_irqsafe(priv->hw, rxb->skb, stats);
3562         priv->alloc_rxb_skb--;
3563         rxb->skb = NULL;
3564 #ifdef LED
3565         priv->led_packets += len;
3566         iwl_setup_activity_timer(priv);
3567 #endif
3568 }
3569
3570 /* Calc max signal level (dBm) among 3 possible receivers */
3571 static int iwl4965_calc_rssi(struct iwl4965_rx_phy_res *rx_resp)
3572 {
3573         /* data from PHY/DSP regarding signal strength, etc.,
3574          *   contents are always there, not configurable by host.  */
3575         struct iwl4965_rx_non_cfg_phy *ncphy =
3576             (struct iwl4965_rx_non_cfg_phy *)rx_resp->non_cfg_phy;
3577         u32 agc = (le16_to_cpu(ncphy->agc_info) & IWL_AGC_DB_MASK)
3578                         >> IWL_AGC_DB_POS;
3579
3580         u32 valid_antennae =
3581             (le16_to_cpu(rx_resp->phy_flags) & RX_PHY_FLAGS_ANTENNAE_MASK)
3582                         >> RX_PHY_FLAGS_ANTENNAE_OFFSET;
3583         u8 max_rssi = 0;
3584         u32 i;
3585
3586         /* Find max rssi among 3 possible receivers.
3587          * These values are measured by the digital signal processor (DSP).
3588          * They should stay fairly constant even as the signal strength varies,
3589          *   if the radio's automatic gain control (AGC) is working right.
3590          * AGC value (see below) will provide the "interesting" info. */
3591         for (i = 0; i < 3; i++)
3592                 if (valid_antennae & (1 << i))
3593                         max_rssi = max(ncphy->rssi_info[i << 1], max_rssi);
3594
3595         IWL_DEBUG_STATS("Rssi In A %d B %d C %d Max %d AGC dB %d\n",
3596                 ncphy->rssi_info[0], ncphy->rssi_info[2], ncphy->rssi_info[4],
3597                 max_rssi, agc);
3598
3599         /* dBm = max_rssi dB - agc dB - constant.
3600          * Higher AGC (higher radio gain) means lower signal. */
3601         return (max_rssi - agc - IWL_RSSI_OFFSET);
3602 }
3603
3604 #ifdef CONFIG_IWLWIFI_HT
3605
3606 /* Parsed Information Elements */
3607 struct ieee802_11_elems {
3608         u8 *ds_params;
3609         u8 ds_params_len;
3610         u8 *tim;
3611         u8 tim_len;
3612         u8 *ibss_params;
3613         u8 ibss_params_len;
3614         u8 *erp_info;
3615         u8 erp_info_len;
3616         u8 *ht_cap_param;
3617         u8 ht_cap_param_len;
3618         u8 *ht_extra_param;
3619         u8 ht_extra_param_len;
3620 };
3621
3622 static int parse_elems(u8 *start, size_t len, struct ieee802_11_elems *elems)
3623 {
3624         size_t left = len;
3625         u8 *pos = start;
3626         int unknown = 0;
3627
3628         memset(elems, 0, sizeof(*elems));
3629
3630         while (left >= 2) {
3631                 u8 id, elen;
3632
3633                 id = *pos++;
3634                 elen = *pos++;
3635                 left -= 2;
3636
3637                 if (elen > left)
3638                         return -1;
3639
3640                 switch (id) {
3641                 case WLAN_EID_DS_PARAMS:
3642                         elems->ds_params = pos;
3643                         elems->ds_params_len = elen;
3644                         break;
3645                 case WLAN_EID_TIM:
3646                         elems->tim = pos;
3647                         elems->tim_len = elen;
3648                         break;
3649                 case WLAN_EID_IBSS_PARAMS:
3650                         elems->ibss_params = pos;
3651                         elems->ibss_params_len = elen;
3652                         break;
3653                 case WLAN_EID_ERP_INFO:
3654                         elems->erp_info = pos;
3655                         elems->erp_info_len = elen;
3656                         break;
3657                 case WLAN_EID_HT_CAPABILITY:
3658                         elems->ht_cap_param = pos;
3659                         elems->ht_cap_param_len = elen;
3660                         break;
3661                 case WLAN_EID_HT_EXTRA_INFO:
3662                         elems->ht_extra_param = pos;
3663                         elems->ht_extra_param_len = elen;
3664                         break;
3665                 default:
3666                         unknown++;
3667                         break;
3668                 }
3669
3670                 left -= elen;
3671                 pos += elen;
3672         }
3673
3674         return 0;
3675 }
3676 #endif /* CONFIG_IWLWIFI_HT */
3677
3678 static void iwl4965_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
3679 {
3680         unsigned long flags;
3681
3682         spin_lock_irqsave(&priv->sta_lock, flags);
3683         priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
3684         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
3685         priv->stations[sta_id].sta.sta.modify_mask = 0;
3686         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3687         spin_unlock_irqrestore(&priv->sta_lock, flags);
3688
3689         iwl_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
3690 }
3691
3692 static void iwl4965_update_ps_mode(struct iwl_priv *priv, u16 ps_bit, u8 *addr)
3693 {
3694         /* FIXME: need locking over ps_status ??? */
3695         u8 sta_id = iwl_hw_find_station(priv, addr);
3696
3697         if (sta_id != IWL_INVALID_STATION) {
3698                 u8 sta_awake = priv->stations[sta_id].
3699                                 ps_status == STA_PS_STATUS_WAKE;
3700
3701                 if (sta_awake && ps_bit)
3702                         priv->stations[sta_id].ps_status = STA_PS_STATUS_SLEEP;
3703                 else if (!sta_awake && !ps_bit) {
3704                         iwl4965_sta_modify_ps_wake(priv, sta_id);
3705                         priv->stations[sta_id].ps_status = STA_PS_STATUS_WAKE;
3706                 }
3707         }
3708 }
3709
3710 /* Called for REPLY_4965_RX (legacy ABG frames), or
3711  * REPLY_RX_MPDU_CMD (HT high-throughput N frames). */
3712 static void iwl4965_rx_reply_rx(struct iwl_priv *priv,
3713                                 struct iwl_rx_mem_buffer *rxb)
3714 {
3715         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3716         /* Use phy data (Rx signal strength, etc.) contained within
3717          *   this rx packet for legacy frames,
3718          *   or phy data cached from REPLY_RX_PHY_CMD for HT frames. */
3719         int include_phy = (pkt->hdr.cmd == REPLY_4965_RX);
3720         struct iwl4965_rx_phy_res *rx_start = (include_phy) ?
3721                 (struct iwl4965_rx_phy_res *)&(pkt->u.raw[0]) :
3722                 (struct iwl4965_rx_phy_res *)&priv->last_phy_res[1];
3723         __le32 *rx_end;
3724         unsigned int len = 0;
3725         struct ieee80211_hdr *header;
3726         u16 fc;
3727         struct ieee80211_rx_status stats = {
3728                 .mactime = le64_to_cpu(rx_start->timestamp),
3729                 .channel = le16_to_cpu(rx_start->channel),
3730                 .phymode =
3731                         (rx_start->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ?
3732                         MODE_IEEE80211G : MODE_IEEE80211A,
3733                 .antenna = 0,
3734                 .rate = iwl_hw_get_rate(rx_start->rate_n_flags),
3735                 .flag = 0,
3736 #ifdef CONFIG_IWLWIFI_HT_AGG
3737                 .ordered = 0
3738 #endif /* CONFIG_IWLWIFI_HT_AGG */
3739         };
3740         u8 network_packet;
3741
3742         if ((unlikely(rx_start->cfg_phy_cnt > 20))) {
3743                 IWL_DEBUG_DROP
3744                         ("dsp size out of range [0,20]: "
3745                          "%d/n", rx_start->cfg_phy_cnt);
3746                 return;
3747         }
3748         if (!include_phy) {
3749                 if (priv->last_phy_res[0])
3750                         rx_start = (struct iwl4965_rx_phy_res *)
3751                                 &priv->last_phy_res[1];
3752                 else
3753                         rx_start = NULL;
3754         }
3755
3756         if (!rx_start) {
3757                 IWL_ERROR("MPDU frame without a PHY data\n");
3758                 return;
3759         }
3760
3761         if (include_phy) {
3762                 header = (struct ieee80211_hdr *)((u8 *) & rx_start[1]
3763                                                   + rx_start->cfg_phy_cnt);
3764
3765                 len = le16_to_cpu(rx_start->byte_count);
3766                 rx_end = (__le32 *) (pkt->u.raw + rx_start->cfg_phy_cnt +
3767                                   sizeof(struct iwl4965_rx_phy_res) + len);
3768         } else {
3769                 struct iwl4965_rx_mpdu_res_start *amsdu =
3770                         (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw;
3771
3772                 header = (void *)(pkt->u.raw +
3773                         sizeof(struct iwl4965_rx_mpdu_res_start));
3774                 len = le16_to_cpu(amsdu->byte_count);
3775                 rx_end = (__le32 *) (pkt->u.raw +
3776                         sizeof(struct iwl4965_rx_mpdu_res_start) + len);
3777         }
3778
3779         if (!(*rx_end & RX_RES_STATUS_NO_CRC32_ERROR) ||
3780             !(*rx_end & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
3781                 IWL_DEBUG_RX("Bad CRC or FIFO: 0x%08X.\n",
3782                                 le32_to_cpu(*rx_end));
3783                 return;
3784         }
3785
3786         priv->ucode_beacon_time = le32_to_cpu(rx_start->beacon_time_stamp);
3787
3788         stats.freq = ieee80211chan2mhz(stats.channel);
3789
3790         /* Find max signal strength (dBm) among 3 antenna/receiver chains */
3791         stats.ssi = iwl4965_calc_rssi(rx_start);
3792
3793         /* Meaningful noise values are available only from beacon statistics,
3794          *   which are gathered only when associated, and indicate noise
3795          *   only for the associated network channel ...
3796          * Ignore these noise values while scanning (other channels) */
3797         if (iwl_is_associated(priv) &&
3798             !test_bit(STATUS_SCANNING, &priv->status)) {
3799                 stats.noise = priv->last_rx_noise;
3800                 stats.signal = iwl_calc_sig_qual(stats.ssi, stats.noise);
3801         } else {
3802                 stats.noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
3803                 stats.signal = iwl_calc_sig_qual(stats.ssi, 0);
3804         }
3805
3806         /* Reset beacon noise level if not associated. */
3807         if (!iwl_is_associated(priv))
3808                 priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
3809
3810 #ifdef CONFIG_IWLWIFI_DEBUG
3811         /* TODO:  Parts of iwl_report_frame are broken for 4965 */
3812         if (iwl_debug_level & (IWL_DL_RX))
3813                 /* Set "1" to report good data frames in groups of 100 */
3814                 iwl_report_frame(priv, pkt, header, 1);
3815
3816         if (iwl_debug_level & (IWL_DL_RX | IWL_DL_STATS))
3817         IWL_DEBUG_RX("Rssi %d, noise %d, qual %d, TSF %lu\n",
3818                 stats.ssi, stats.noise, stats.signal,
3819                  (long unsigned int)le64_to_cpu(rx_start->timestamp));
3820 #endif
3821
3822         network_packet = iwl_is_network_packet(priv, header);
3823         if (network_packet) {
3824                 priv->last_rx_rssi = stats.ssi;
3825                 priv->last_beacon_time =  priv->ucode_beacon_time;
3826                 priv->last_tsf = le64_to_cpu(rx_start->timestamp);
3827         }
3828
3829         fc = le16_to_cpu(header->frame_control);
3830         switch (fc & IEEE80211_FCTL_FTYPE) {
3831         case IEEE80211_FTYPE_MGMT:
3832
3833                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
3834                         iwl4965_update_ps_mode(priv, fc  & IEEE80211_FCTL_PM,
3835                                                 header->addr2);
3836                 switch (fc & IEEE80211_FCTL_STYPE) {
3837                 case IEEE80211_STYPE_PROBE_RESP:
3838                 case IEEE80211_STYPE_BEACON:
3839                         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA &&
3840                              !compare_ether_addr(header->addr2, priv->bssid)) ||
3841                             (priv->iw_mode == IEEE80211_IF_TYPE_IBSS &&
3842                              !compare_ether_addr(header->addr3, priv->bssid))) {
3843                                 struct ieee80211_mgmt *mgmt =
3844                                         (struct ieee80211_mgmt *)header;
3845                                 u64 timestamp =
3846                                         le64_to_cpu(mgmt->u.beacon.timestamp);
3847
3848                                 priv->timestamp0 = timestamp & 0xFFFFFFFF;
3849                                 priv->timestamp1 =
3850                                         (timestamp >> 32) & 0xFFFFFFFF;
3851                                 priv->beacon_int = le16_to_cpu(
3852                                     mgmt->u.beacon.beacon_int);
3853                                 if (priv->call_post_assoc_from_beacon &&
3854                                     (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
3855                                         priv->call_post_assoc_from_beacon = 0;
3856                                         queue_work(priv->workqueue,
3857                                             &priv->post_associate.work);
3858                                 }
3859                         }
3860                         break;
3861
3862                 case IEEE80211_STYPE_ACTION:
3863                         break;
3864
3865                         /*
3866                          * TODO: There is no callback function from upper
3867                          * stack to inform us when associated status. this
3868                          * work around to sniff assoc_resp management frame
3869                          * and finish the association process.
3870                          */
3871                 case IEEE80211_STYPE_ASSOC_RESP:
3872                 case IEEE80211_STYPE_REASSOC_RESP:
3873                         if (network_packet) {
3874 #ifdef CONFIG_IWLWIFI_HT
3875                                 u8 *pos = NULL;
3876                                 struct ieee802_11_elems elems;
3877 #endif                          /*CONFIG_IWLWIFI_HT */
3878                                 struct ieee80211_mgmt *mgnt =
3879                                         (struct ieee80211_mgmt *)header;
3880
3881                                 priv->assoc_id = (~((1 << 15) | (1 << 14))
3882                                         & le16_to_cpu(mgnt->u.assoc_resp.aid));
3883                                 priv->assoc_capability =
3884                                         le16_to_cpu(
3885                                                 mgnt->u.assoc_resp.capab_info);
3886 #ifdef CONFIG_IWLWIFI_HT
3887                                 pos = mgnt->u.assoc_resp.variable;
3888                                 if (!parse_elems(pos,
3889                                                  len - (pos - (u8 *) mgnt),
3890                                                  &elems)) {
3891                                         if (elems.ht_extra_param &&
3892                                             elems.ht_cap_param)
3893                                                 break;
3894                                 }
3895 #endif                          /*CONFIG_IWLWIFI_HT */
3896                                 /* assoc_id is 0 no association */
3897                                 if (!priv->assoc_id)
3898                                         break;
3899                                 if (priv->beacon_int)
3900                                         queue_work(priv->workqueue,
3901                                             &priv->post_associate.work);
3902                                 else
3903                                         priv->call_post_assoc_from_beacon = 1;
3904                         }
3905
3906                         break;
3907
3908                 case IEEE80211_STYPE_PROBE_REQ:
3909                         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
3910                             !iwl_is_associated(priv)) {
3911                                 DECLARE_MAC_BUF(mac1);
3912                                 DECLARE_MAC_BUF(mac2);
3913                                 DECLARE_MAC_BUF(mac3);
3914
3915                                 IWL_DEBUG_DROP("Dropping (non network): "
3916                                                "%s, %s, %s\n",
3917                                                print_mac(mac1, header->addr1),
3918                                                print_mac(mac2, header->addr2),
3919                                                print_mac(mac3, header->addr3));
3920                                 return;
3921                         }
3922                 }
3923                 iwl4965_handle_data_packet(priv, 0, include_phy, rxb, &stats);
3924                 break;
3925
3926         case IEEE80211_FTYPE_CTL:
3927 #ifdef CONFIG_IWLWIFI_HT_AGG
3928                 switch (fc & IEEE80211_FCTL_STYPE) {
3929                 case IEEE80211_STYPE_BACK_REQ:
3930                         IWL_DEBUG_HT("IEEE80211_STYPE_BACK_REQ arrived\n");
3931                         iwl4965_handle_data_packet(priv, 0, include_phy,
3932                                                 rxb, &stats);
3933                         break;
3934                 default:
3935                         break;
3936                 }
3937 #endif
3938
3939                 break;
3940
3941         case IEEE80211_FTYPE_DATA: {
3942                 DECLARE_MAC_BUF(mac1);
3943                 DECLARE_MAC_BUF(mac2);
3944                 DECLARE_MAC_BUF(mac3);
3945
3946                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
3947                         iwl4965_update_ps_mode(priv, fc  & IEEE80211_FCTL_PM,
3948                                                 header->addr2);
3949
3950                 if (unlikely(!network_packet))
3951                         IWL_DEBUG_DROP("Dropping (non network): "
3952                                        "%s, %s, %s\n",
3953                                        print_mac(mac1, header->addr1),
3954                                        print_mac(mac2, header->addr2),
3955                                        print_mac(mac3, header->addr3));
3956                 else if (unlikely(is_duplicate_packet(priv, header)))
3957                         IWL_DEBUG_DROP("Dropping (dup): %s, %s, %s\n",
3958                                        print_mac(mac1, header->addr1),
3959                                        print_mac(mac2, header->addr2),
3960                                        print_mac(mac3, header->addr3));
3961                 else
3962                         iwl4965_handle_data_packet(priv, 1, include_phy, rxb,
3963                                                    &stats);
3964                 break;
3965         }
3966         default:
3967                 break;
3968
3969         }
3970 }
3971
3972 /* Cache phy data (Rx signal strength, etc) for HT frame (REPLY_RX_PHY_CMD).
3973  * This will be used later in iwl4965_rx_reply_rx() for REPLY_RX_MPDU_CMD. */
3974 static void iwl4965_rx_reply_rx_phy(struct iwl_priv *priv,
3975                                     struct iwl_rx_mem_buffer *rxb)
3976 {
3977         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3978         priv->last_phy_res[0] = 1;
3979         memcpy(&priv->last_phy_res[1], &(pkt->u.raw[0]),
3980                sizeof(struct iwl4965_rx_phy_res));
3981 }
3982
3983 static void iwl4965_rx_missed_beacon_notif(struct iwl_priv *priv,
3984                                            struct iwl_rx_mem_buffer *rxb)
3985
3986 {
3987 #ifdef CONFIG_IWLWIFI_SENSITIVITY
3988         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3989         struct iwl_missed_beacon_notif *missed_beacon;
3990
3991         missed_beacon = &pkt->u.missed_beacon;
3992         if (le32_to_cpu(missed_beacon->consequtive_missed_beacons) > 5) {
3993                 IWL_DEBUG_CALIB("missed bcn cnsq %d totl %d rcd %d expctd %d\n",
3994                     le32_to_cpu(missed_beacon->consequtive_missed_beacons),
3995                     le32_to_cpu(missed_beacon->total_missed_becons),
3996                     le32_to_cpu(missed_beacon->num_recvd_beacons),
3997                     le32_to_cpu(missed_beacon->num_expected_beacons));
3998                 priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
3999                 if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)))
4000                         queue_work(priv->workqueue, &priv->sensitivity_work);
4001         }
4002 #endif /*CONFIG_IWLWIFI_SENSITIVITY*/
4003 }
4004
4005 #ifdef CONFIG_IWLWIFI_HT
4006 #ifdef CONFIG_IWLWIFI_HT_AGG
4007
4008 static void iwl4965_set_tx_status(struct iwl_priv *priv, int txq_id, int idx,
4009                                   u32 status, u32 retry_count, u32 rate)
4010 {
4011         struct ieee80211_tx_status *tx_status =
4012                 &(priv->txq[txq_id].txb[idx].status);
4013
4014         tx_status->flags = status ? IEEE80211_TX_STATUS_ACK : 0;
4015         tx_status->retry_count += retry_count;
4016         tx_status->control.tx_rate = rate;
4017 }
4018
4019
4020 static void iwl_sta_modify_enable_tid_tx(struct iwl_priv *priv,
4021                                          int sta_id, int tid)
4022 {
4023         unsigned long flags;
4024
4025         spin_lock_irqsave(&priv->sta_lock, flags);
4026         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
4027         priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
4028         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
4029         spin_unlock_irqrestore(&priv->sta_lock, flags);
4030
4031         iwl_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
4032 }
4033
4034
4035 static int iwl4965_tx_status_reply_compressed_ba(struct iwl_priv *priv,
4036                                                  struct iwl_ht_agg *agg,
4037                                                  struct iwl_compressed_ba_resp*
4038                                                  ba_resp)
4039
4040 {
4041         int i, sh, ack;
4042         u16 ba_seq_ctl = le16_to_cpu(ba_resp->ba_seq_ctl);
4043         u32 bitmap0, bitmap1;
4044         u32 resp_bitmap0 = le32_to_cpu(ba_resp->ba_bitmap0);
4045         u32 resp_bitmap1 = le32_to_cpu(ba_resp->ba_bitmap1);
4046
4047         if (unlikely(!agg->wait_for_ba))  {
4048                 IWL_ERROR("Received BA when not expected\n");
4049                 return -EINVAL;
4050         }
4051         agg->wait_for_ba = 0;
4052         IWL_DEBUG_TX_REPLY("BA %d %d\n", agg->start_idx, ba_resp->ba_seq_ctl);
4053         sh = agg->start_idx - SEQ_TO_INDEX(ba_seq_ctl>>4);
4054         if (sh < 0) /* tbw something is wrong with indeces */
4055                 sh += 0x100;
4056
4057         /* don't use 64 bits for now */
4058         bitmap0 = resp_bitmap0 >> sh;
4059         bitmap1 = resp_bitmap1 >> sh;
4060         bitmap0 |= (resp_bitmap1 & ((1<<sh)|((1<<sh)-1))) << (32 - sh);
4061
4062         if (agg->frame_count > (64 - sh)) {
4063                 IWL_DEBUG_TX_REPLY("more frames than bitmap size");
4064                 return -1;
4065         }
4066
4067         /* check for success or failure according to the
4068          * transmitted bitmap and back bitmap */
4069         bitmap0 &= agg->bitmap0;
4070         bitmap1 &= agg->bitmap1;
4071
4072         for (i = 0; i < agg->frame_count ; i++) {
4073                 int idx = (agg->start_idx + i) & 0xff;
4074                 ack = bitmap0 & (1 << i);
4075                 IWL_DEBUG_TX_REPLY("%s ON i=%d idx=%d raw=%d\n",
4076                         ack? "ACK":"NACK", i, idx, agg->start_idx + i);
4077                 iwl4965_set_tx_status(priv, agg->txq_id, idx, ack, 0,
4078                         agg->rate_n_flags);
4079
4080         }
4081
4082         IWL_DEBUG_TX_REPLY("Bitmap %x%x\n", bitmap0, bitmap1);
4083
4084         return 0;
4085 }
4086
4087 static inline int iwl_queue_dec_wrap(int index, int n_bd)
4088 {
4089         return (index == 0) ? n_bd - 1 : index - 1;
4090 }
4091
4092 static void iwl4965_rx_reply_compressed_ba(struct iwl_priv *priv,
4093                                            struct iwl_rx_mem_buffer *rxb)
4094 {
4095         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
4096         struct iwl_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba;
4097         int index;
4098         struct iwl_tx_queue *txq = NULL;
4099         struct iwl_ht_agg *agg;
4100         u16 ba_resp_scd_flow = le16_to_cpu(ba_resp->scd_flow);
4101         u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
4102
4103         if (ba_resp_scd_flow >= ARRAY_SIZE(priv->txq)) {
4104                 IWL_ERROR("BUG_ON scd_flow is bigger than number of queues");
4105                 return;
4106         }
4107
4108         txq = &priv->txq[ba_resp_scd_flow];
4109         agg = &priv->stations[ba_resp->sta_id].tid[ba_resp->tid].agg;
4110         index = iwl_queue_dec_wrap(ba_resp_scd_ssn & 0xff, txq->q.n_bd);
4111
4112         /* TODO: Need to get this copy more sefely - now good for debug */
4113 /*
4114         {
4115         DECLARE_MAC_BUF(mac);
4116         IWL_DEBUG_TX_REPLY("REPLY_COMPRESSED_BA [%d]Received from %s, "
4117                            "sta_id = %d\n",
4118                            agg->wait_for_ba,
4119                            print_mac(mac, (u8*) &ba_resp->sta_addr_lo32),
4120                            ba_resp->sta_id);
4121         IWL_DEBUG_TX_REPLY("TID = %d, SeqCtl = %d, bitmap = 0x%X%X, scd_flow = "
4122                            "%d, scd_ssn = %d\n",
4123                            ba_resp->tid,
4124                            ba_resp->ba_seq_ctl,
4125                            ba_resp->ba_bitmap1,
4126                            ba_resp->ba_bitmap0,
4127                            ba_resp->scd_flow,
4128                            ba_resp->scd_ssn);
4129         IWL_DEBUG_TX_REPLY("DAT start_idx = %d, bitmap = 0x%X%X \n",
4130                            agg->start_idx,
4131                            agg->bitmap1,
4132                            agg->bitmap0);
4133         }
4134 */
4135         iwl4965_tx_status_reply_compressed_ba(priv, agg, ba_resp);
4136         /* releases all the TFDs until the SSN */
4137         if (txq->q.last_used != (ba_resp_scd_ssn & 0xff))
4138                 iwl_tx_queue_reclaim(priv, ba_resp_scd_flow, index);
4139
4140 }
4141
4142
4143 static void iwl4965_tx_queue_stop_scheduler(struct iwl_priv *priv, u16 txq_id)
4144 {
4145         iwl_write_restricted_reg(priv,
4146                 SCD_QUEUE_STATUS_BITS(txq_id),
4147                 (0 << SCD_QUEUE_STTS_REG_POS_ACTIVE)|
4148                 (1 << SCD_QUEUE_STTS_REG_POS_SCD_ACT_EN));
4149 }
4150
4151 static int iwl4965_tx_queue_set_q2ratid(struct iwl_priv *priv, u16 ra_tid,
4152                                         u16 txq_id)
4153 {
4154         u32 tbl_dw_addr;
4155         u32 tbl_dw;
4156         u16 scd_q2ratid;
4157
4158         scd_q2ratid = ra_tid & SCD_QUEUE_RA_TID_MAP_RATID_MSK;
4159
4160         tbl_dw_addr = priv->scd_base_addr +
4161                         SCD_TRANSLATE_TBL_OFFSET_QUEUE(txq_id);
4162
4163         tbl_dw = iwl_read_restricted_mem(priv, tbl_dw_addr);
4164
4165         if (txq_id & 0x1)
4166                 tbl_dw = (scd_q2ratid << 16) | (tbl_dw & 0x0000FFFF);
4167         else
4168                 tbl_dw = scd_q2ratid | (tbl_dw & 0xFFFF0000);
4169
4170         iwl_write_restricted_mem(priv, tbl_dw_addr, tbl_dw);
4171
4172         return 0;
4173 }
4174
4175 /**
4176  * txq_id must be greater than IWL_BACK_QUEUE_FIRST_ID
4177  */
4178 static int iwl4965_tx_queue_agg_enable(struct iwl_priv *priv, int txq_id,
4179                                        int tx_fifo, int sta_id, int tid,
4180                                        u16 ssn_idx)
4181 {
4182         unsigned long flags;
4183         int rc;
4184         u16 ra_tid;
4185
4186         if (IWL_BACK_QUEUE_FIRST_ID > txq_id)
4187                 IWL_WARNING("queue number too small: %d, must be > %d\n",
4188                         txq_id, IWL_BACK_QUEUE_FIRST_ID);
4189
4190         ra_tid = BUILD_RAxTID(sta_id, tid);
4191
4192         iwl_sta_modify_enable_tid_tx(priv, sta_id, tid);
4193
4194         spin_lock_irqsave(&priv->lock, flags);
4195         rc = iwl_grab_restricted_access(priv);
4196         if (rc) {
4197                 spin_unlock_irqrestore(&priv->lock, flags);
4198                 return rc;
4199         }
4200
4201         iwl4965_tx_queue_stop_scheduler(priv, txq_id);
4202
4203         iwl4965_tx_queue_set_q2ratid(priv, ra_tid, txq_id);
4204
4205
4206         iwl_set_bits_restricted_reg(priv, SCD_QUEUECHAIN_SEL, (1<<txq_id));
4207
4208         priv->txq[txq_id].q.last_used = (ssn_idx & 0xff);
4209         priv->txq[txq_id].q.first_empty = (ssn_idx & 0xff);
4210
4211         /* supposes that ssn_idx is valid (!= 0xFFF) */
4212         iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
4213
4214         iwl_write_restricted_mem(priv,
4215                         priv->scd_base_addr + SCD_CONTEXT_QUEUE_OFFSET(txq_id),
4216                         (SCD_WIN_SIZE << SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
4217                         SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
4218
4219         iwl_write_restricted_mem(priv, priv->scd_base_addr +
4220                         SCD_CONTEXT_QUEUE_OFFSET(txq_id) + sizeof(u32),
4221                         (SCD_FRAME_LIMIT << SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS)
4222                         & SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
4223
4224         iwl_set_bits_restricted_reg(priv, SCD_INTERRUPT_MASK, (1 << txq_id));
4225
4226         iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 1);
4227
4228         iwl_release_restricted_access(priv);
4229         spin_unlock_irqrestore(&priv->lock, flags);
4230
4231         return 0;
4232 }
4233
4234 /**
4235  * txq_id must be greater than IWL_BACK_QUEUE_FIRST_ID
4236  */
4237 static int iwl4965_tx_queue_agg_disable(struct iwl_priv *priv, u16 txq_id,
4238                                         u16 ssn_idx, u8 tx_fifo)
4239 {
4240         unsigned long flags;
4241         int rc;
4242
4243         if (IWL_BACK_QUEUE_FIRST_ID > txq_id) {
4244                 IWL_WARNING("queue number too small: %d, must be > %d\n",
4245                                 txq_id, IWL_BACK_QUEUE_FIRST_ID);
4246                 return -EINVAL;
4247         }
4248
4249         spin_lock_irqsave(&priv->lock, flags);
4250         rc = iwl_grab_restricted_access(priv);
4251         if (rc) {
4252                 spin_unlock_irqrestore(&priv->lock, flags);
4253                 return rc;
4254         }
4255
4256         iwl4965_tx_queue_stop_scheduler(priv, txq_id);
4257
4258         iwl_clear_bits_restricted_reg(priv, SCD_QUEUECHAIN_SEL, (1 << txq_id));
4259
4260         priv->txq[txq_id].q.last_used = (ssn_idx & 0xff);
4261         priv->txq[txq_id].q.first_empty = (ssn_idx & 0xff);
4262         /* supposes that ssn_idx is valid (!= 0xFFF) */
4263         iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
4264
4265         iwl_clear_bits_restricted_reg(priv, SCD_INTERRUPT_MASK, (1 << txq_id));
4266         iwl4965_txq_ctx_deactivate(priv, txq_id);
4267         iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 0);
4268
4269         iwl_release_restricted_access(priv);
4270         spin_unlock_irqrestore(&priv->lock, flags);
4271
4272         return 0;
4273 }
4274
4275 #endif/* CONFIG_IWLWIFI_HT_AGG */
4276 #endif /* CONFIG_IWLWIFI_HT */
4277 /*
4278  * RATE SCALE CODE
4279  */
4280 int iwl4965_init_hw_rates(struct iwl_priv *priv, struct ieee80211_rate *rates)
4281 {
4282         return 0;
4283 }
4284
4285
4286 /**
4287  * iwl4965_add_station - Initialize a station's hardware rate table
4288  *
4289  * The uCode contains a table of fallback rates and retries per rate
4290  * for automatic fallback during transmission.
4291  *
4292  * NOTE: This initializes the table for a single retry per data rate
4293  * which is not optimal.  Setting up an intelligent retry per rate
4294  * requires feedback from transmission, which isn't exposed through
4295  * rc80211_simple which is what this driver is currently using.
4296  *
4297  */
4298 void iwl4965_add_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
4299 {
4300         int i, r;
4301         struct iwl_link_quality_cmd link_cmd = {
4302                 .reserved1 = 0,
4303         };
4304         u16 rate_flags;
4305
4306         /* Set up the rate scaling to start at 54M and fallback
4307          * all the way to 1M in IEEE order and then spin on IEEE */
4308         if (is_ap)
4309                 r = IWL_RATE_54M_INDEX;
4310         else if (priv->phymode == MODE_IEEE80211A)
4311                 r = IWL_RATE_6M_INDEX;
4312         else
4313                 r = IWL_RATE_1M_INDEX;
4314
4315         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
4316                 rate_flags = 0;
4317                 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
4318                         rate_flags |= RATE_MCS_CCK_MSK;
4319
4320                 rate_flags |= RATE_MCS_ANT_B_MSK;
4321                 rate_flags &= ~RATE_MCS_ANT_A_MSK;
4322                 link_cmd.rs_table[i].rate_n_flags =
4323                         iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
4324                 r = iwl_get_prev_ieee_rate(r);
4325         }
4326
4327         link_cmd.general_params.single_stream_ant_msk = 2;
4328         link_cmd.general_params.dual_stream_ant_msk = 3;
4329         link_cmd.agg_params.agg_dis_start_th = 3;
4330         link_cmd.agg_params.agg_time_limit = cpu_to_le16(4000);
4331
4332         /* Update the rate scaling for control frame Tx to AP */
4333         link_cmd.sta_id = is_ap ? IWL_AP_ID : IWL4965_BROADCAST_ID;
4334
4335         iwl_send_cmd_pdu(priv, REPLY_TX_LINK_QUALITY_CMD, sizeof(link_cmd),
4336                          &link_cmd);
4337 }
4338
4339 #ifdef CONFIG_IWLWIFI_HT
4340
4341 static u8 iwl_is_channel_extension(struct iwl_priv *priv, int phymode,
4342                                    u16 channel, u8 extension_chan_offset)
4343 {
4344         const struct iwl_channel_info *ch_info;
4345
4346         ch_info = iwl_get_channel_info(priv, phymode, channel);
4347         if (!is_channel_valid(ch_info))
4348                 return 0;
4349
4350         if (extension_chan_offset == IWL_EXT_CHANNEL_OFFSET_AUTO)
4351                 return 0;
4352
4353         if ((ch_info->fat_extension_channel == extension_chan_offset) ||
4354             (ch_info->fat_extension_channel == HT_IE_EXT_CHANNEL_MAX))
4355                 return 1;
4356
4357         return 0;
4358 }
4359
4360 static u8 iwl_is_fat_tx_allowed(struct iwl_priv *priv,
4361                                 const struct sta_ht_info *ht_info)
4362 {
4363
4364         if (priv->channel_width != IWL_CHANNEL_WIDTH_40MHZ)
4365                 return 0;
4366
4367         if (ht_info->supported_chan_width != IWL_CHANNEL_WIDTH_40MHZ)
4368                 return 0;
4369
4370         if (ht_info->extension_chan_offset == IWL_EXT_CHANNEL_OFFSET_AUTO)
4371                 return 0;
4372
4373         /* no fat tx allowed on 2.4GHZ */
4374         if (priv->phymode != MODE_IEEE80211A)
4375                 return 0;
4376         return (iwl_is_channel_extension(priv, priv->phymode,
4377                                          ht_info->control_channel,
4378                                          ht_info->extension_chan_offset));
4379 }
4380
4381 void iwl4965_set_rxon_ht(struct iwl_priv *priv, struct sta_ht_info *ht_info)
4382 {
4383         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
4384         u32 val;
4385
4386         if (!ht_info->is_ht)
4387                 return;
4388
4389         if (iwl_is_fat_tx_allowed(priv, ht_info))
4390                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED_MSK;
4391         else
4392                 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
4393                                  RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
4394
4395         if (le16_to_cpu(rxon->channel) != ht_info->control_channel) {
4396                 IWL_DEBUG_ASSOC("control diff than current %d %d\n",
4397                                 le16_to_cpu(rxon->channel),
4398                                 ht_info->control_channel);
4399                 rxon->channel = cpu_to_le16(ht_info->control_channel);
4400                 return;
4401         }
4402
4403         /* Note: control channel is oposit to extension channel */
4404         switch (ht_info->extension_chan_offset) {
4405         case IWL_EXT_CHANNEL_OFFSET_ABOVE:
4406                 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
4407                 break;
4408         case IWL_EXT_CHANNEL_OFFSET_BELOW:
4409                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
4410                 break;
4411         case IWL_EXT_CHANNEL_OFFSET_AUTO:
4412                 rxon->flags &= ~RXON_FLG_CHANNEL_MODE_MIXED_MSK;
4413                 break;
4414         default:
4415                 rxon->flags &= ~RXON_FLG_CHANNEL_MODE_MIXED_MSK;
4416                 break;
4417         }
4418
4419         val = ht_info->operating_mode;
4420
4421         rxon->flags |= cpu_to_le32(val << RXON_FLG_HT_OPERATING_MODE_POS);
4422
4423         priv->active_rate_ht[0] = ht_info->supp_rates[0];
4424         priv->active_rate_ht[1] = ht_info->supp_rates[1];
4425         iwl4965_set_rxon_chain(priv);
4426
4427         IWL_DEBUG_ASSOC("supported HT rate 0x%X %X "
4428                         "rxon flags 0x%X operation mode :0x%X "
4429                         "extension channel offset 0x%x "
4430                         "control chan %d\n",
4431                         priv->active_rate_ht[0], priv->active_rate_ht[1],
4432                         le32_to_cpu(rxon->flags), ht_info->operating_mode,
4433                         ht_info->extension_chan_offset,
4434                         ht_info->control_channel);
4435         return;
4436 }
4437
4438 void iwl4965_set_ht_add_station(struct iwl_priv *priv, u8 index)
4439 {
4440         __le32 sta_flags;
4441         struct sta_ht_info *ht_info = &priv->current_assoc_ht;
4442
4443         priv->current_channel_width = IWL_CHANNEL_WIDTH_20MHZ;
4444         if (!ht_info->is_ht)
4445                 goto done;
4446
4447         sta_flags = priv->stations[index].sta.station_flags;
4448
4449         if (ht_info->tx_mimo_ps_mode == IWL_MIMO_PS_DYNAMIC)
4450                 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
4451         else
4452                 sta_flags &= ~STA_FLG_RTS_MIMO_PROT_MSK;
4453
4454         sta_flags |= cpu_to_le32(
4455                 (u32)ht_info->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
4456
4457         sta_flags |= cpu_to_le32(
4458                 (u32)ht_info->mpdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
4459
4460         sta_flags &= (~STA_FLG_FAT_EN_MSK);
4461         ht_info->tx_chan_width = IWL_CHANNEL_WIDTH_20MHZ;
4462         ht_info->chan_width_cap = IWL_CHANNEL_WIDTH_20MHZ;
4463
4464         if (iwl_is_fat_tx_allowed(priv, ht_info)) {
4465                 sta_flags |= STA_FLG_FAT_EN_MSK;
4466                 ht_info->chan_width_cap = IWL_CHANNEL_WIDTH_40MHZ;
4467                 if (ht_info->supported_chan_width == IWL_CHANNEL_WIDTH_40MHZ)
4468                         ht_info->tx_chan_width = IWL_CHANNEL_WIDTH_40MHZ;
4469         }
4470         priv->current_channel_width = ht_info->tx_chan_width;
4471         priv->stations[index].sta.station_flags = sta_flags;
4472  done:
4473         return;
4474 }
4475
4476 #ifdef CONFIG_IWLWIFI_HT_AGG
4477
4478 static void iwl4965_sta_modify_add_ba_tid(struct iwl_priv *priv,
4479                                           int sta_id, int tid, u16 ssn)
4480 {
4481         unsigned long flags;
4482
4483         spin_lock_irqsave(&priv->sta_lock, flags);
4484         priv->stations[sta_id].sta.station_flags_msk = 0;
4485         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
4486         priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
4487         priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
4488         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
4489         spin_unlock_irqrestore(&priv->sta_lock, flags);
4490
4491         iwl_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
4492 }
4493
4494 static void iwl4965_sta_modify_del_ba_tid(struct iwl_priv *priv,
4495                                           int sta_id, int tid)
4496 {
4497         unsigned long flags;
4498
4499         spin_lock_irqsave(&priv->sta_lock, flags);
4500         priv->stations[sta_id].sta.station_flags_msk = 0;
4501         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
4502         priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
4503         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
4504         spin_unlock_irqrestore(&priv->sta_lock, flags);
4505
4506         iwl_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
4507 }
4508
4509 static const u16 default_tid_to_tx_fifo[] = {
4510         IWL_TX_FIFO_AC1,
4511         IWL_TX_FIFO_AC0,
4512         IWL_TX_FIFO_AC0,
4513         IWL_TX_FIFO_AC1,
4514         IWL_TX_FIFO_AC2,
4515         IWL_TX_FIFO_AC2,
4516         IWL_TX_FIFO_AC3,
4517         IWL_TX_FIFO_AC3,
4518         IWL_TX_FIFO_NONE,
4519         IWL_TX_FIFO_NONE,
4520         IWL_TX_FIFO_NONE,
4521         IWL_TX_FIFO_NONE,
4522         IWL_TX_FIFO_NONE,
4523         IWL_TX_FIFO_NONE,
4524         IWL_TX_FIFO_NONE,
4525         IWL_TX_FIFO_NONE,
4526         IWL_TX_FIFO_AC3
4527 };
4528
4529 static int iwl_txq_ctx_activate_free(struct iwl_priv *priv)
4530 {
4531         int txq_id;
4532
4533         for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++)
4534                 if (!test_and_set_bit(txq_id, &priv->txq_ctx_active_msk))
4535                         return txq_id;
4536         return -1;
4537 }
4538
4539 int iwl_mac_ht_tx_agg_start(struct ieee80211_hw *hw, u8 *da, u16 tid,
4540                             u16 *start_seq_num)
4541 {
4542
4543         struct iwl_priv *priv = hw->priv;
4544         int sta_id;
4545         int tx_fifo;
4546         int txq_id;
4547         int ssn = -1;
4548         unsigned long flags;
4549         struct iwl_tid_data *tid_data;
4550         DECLARE_MAC_BUF(mac);
4551
4552         if (likely(tid < ARRAY_SIZE(default_tid_to_tx_fifo)))
4553                 tx_fifo = default_tid_to_tx_fifo[tid];
4554         else
4555                 return -EINVAL;
4556
4557         IWL_WARNING("iwl-AGG iwl_mac_ht_tx_agg_start on da=%s"
4558                     " tid=%d\n", print_mac(mac, da), tid);
4559
4560         sta_id = iwl_hw_find_station(priv, da);
4561         if (sta_id == IWL_INVALID_STATION)
4562                 return -ENXIO;
4563
4564         txq_id = iwl_txq_ctx_activate_free(priv);
4565         if (txq_id == -1)
4566                 return -ENXIO;
4567
4568         spin_lock_irqsave(&priv->sta_lock, flags);
4569         tid_data = &priv->stations[sta_id].tid[tid];
4570         ssn = SEQ_TO_SN(tid_data->seq_number);
4571         tid_data->agg.txq_id = txq_id;
4572         spin_unlock_irqrestore(&priv->sta_lock, flags);
4573
4574         *start_seq_num = ssn;
4575         iwl4965_ba_status(priv, tid, BA_STATUS_ACTIVE);
4576         return iwl4965_tx_queue_agg_enable(priv, txq_id, tx_fifo,
4577                                            sta_id, tid, ssn);
4578 }
4579
4580
4581 int iwl_mac_ht_tx_agg_stop(struct ieee80211_hw *hw, u8 *da, u16 tid,
4582                            int generator)
4583 {
4584
4585         struct iwl_priv *priv = hw->priv;
4586         int tx_fifo_id, txq_id, sta_id, ssn = -1;
4587         struct iwl_tid_data *tid_data;
4588         int rc;
4589         DECLARE_MAC_BUF(mac);
4590
4591         if (!da) {
4592                 IWL_ERROR("%s: da = NULL\n", __func__);
4593                 return -EINVAL;
4594         }
4595
4596         if (likely(tid < ARRAY_SIZE(default_tid_to_tx_fifo)))
4597                 tx_fifo_id = default_tid_to_tx_fifo[tid];
4598         else
4599                 return -EINVAL;
4600
4601         sta_id = iwl_hw_find_station(priv, da);
4602
4603         if (sta_id == IWL_INVALID_STATION)
4604                 return -ENXIO;
4605
4606         tid_data = &priv->stations[sta_id].tid[tid];
4607         ssn = (tid_data->seq_number & IEEE80211_SCTL_SEQ) >> 4;
4608         txq_id = tid_data->agg.txq_id;
4609
4610         rc = iwl4965_tx_queue_agg_disable(priv, txq_id, ssn, tx_fifo_id);
4611         /* FIXME: need more safe way to handle error condition */
4612         if (rc)
4613                 return rc;
4614
4615         iwl4965_ba_status(priv, tid, BA_STATUS_INITIATOR_DELBA);
4616         IWL_DEBUG_INFO("iwl_mac_ht_tx_agg_stop on da=%s tid=%d\n",
4617                        print_mac(mac, da), tid);
4618
4619         return 0;
4620 }
4621
4622 int iwl_mac_ht_rx_agg_start(struct ieee80211_hw *hw, u8 *da,
4623                             u16 tid, u16 start_seq_num)
4624 {
4625         struct iwl_priv *priv = hw->priv;
4626         int sta_id;
4627         DECLARE_MAC_BUF(mac);
4628
4629         IWL_WARNING("iwl-AGG iwl_mac_ht_rx_agg_start on da=%s"
4630                     " tid=%d\n", print_mac(mac, da), tid);
4631         sta_id = iwl_hw_find_station(priv, da);
4632         iwl4965_sta_modify_add_ba_tid(priv, sta_id, tid, start_seq_num);
4633         return 0;
4634 }
4635
4636 int iwl_mac_ht_rx_agg_stop(struct ieee80211_hw *hw, u8 *da,
4637                            u16 tid, int generator)
4638 {
4639         struct iwl_priv *priv = hw->priv;
4640         int sta_id;
4641         DECLARE_MAC_BUF(mac);
4642
4643         IWL_WARNING("iwl-AGG iwl_mac_ht_rx_agg_stop on da=%s tid=%d\n",
4644                     print_mac(mac, da), tid);
4645         sta_id = iwl_hw_find_station(priv, da);
4646         iwl4965_sta_modify_del_ba_tid(priv, sta_id, tid);
4647         return 0;
4648 }
4649
4650 #endif /* CONFIG_IWLWIFI_HT_AGG */
4651 #endif /* CONFIG_IWLWIFI_HT */
4652
4653 /* Set up 4965-specific Rx frame reply handlers */
4654 void iwl_hw_rx_handler_setup(struct iwl_priv *priv)
4655 {
4656         /* Legacy Rx frames */
4657         priv->rx_handlers[REPLY_4965_RX] = iwl4965_rx_reply_rx;
4658
4659         /* High-throughput (HT) Rx frames */
4660         priv->rx_handlers[REPLY_RX_PHY_CMD] = iwl4965_rx_reply_rx_phy;
4661         priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwl4965_rx_reply_rx;
4662
4663         priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] =
4664             iwl4965_rx_missed_beacon_notif;
4665
4666 #ifdef CONFIG_IWLWIFI_HT
4667 #ifdef CONFIG_IWLWIFI_HT_AGG
4668         priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl4965_rx_reply_compressed_ba;
4669 #endif /* CONFIG_IWLWIFI_AGG */
4670 #endif /* CONFIG_IWLWIFI */
4671 }
4672
4673 void iwl_hw_setup_deferred_work(struct iwl_priv *priv)
4674 {
4675         INIT_WORK(&priv->txpower_work, iwl4965_bg_txpower_work);
4676         INIT_WORK(&priv->statistics_work, iwl4965_bg_statistics_work);
4677 #ifdef CONFIG_IWLWIFI_SENSITIVITY
4678         INIT_WORK(&priv->sensitivity_work, iwl4965_bg_sensitivity_work);
4679 #endif
4680 #ifdef CONFIG_IWLWIFI_HT
4681 #ifdef CONFIG_IWLWIFI_HT_AGG
4682         INIT_WORK(&priv->agg_work, iwl4965_bg_agg_work);
4683 #endif /* CONFIG_IWLWIFI_AGG */
4684 #endif /* CONFIG_IWLWIFI_HT */
4685         init_timer(&priv->statistics_periodic);
4686         priv->statistics_periodic.data = (unsigned long)priv;
4687         priv->statistics_periodic.function = iwl4965_bg_statistics_periodic;
4688 }
4689
4690 void iwl_hw_cancel_deferred_work(struct iwl_priv *priv)
4691 {
4692         del_timer_sync(&priv->statistics_periodic);
4693
4694         cancel_delayed_work(&priv->init_alive_start);
4695 }
4696
4697 struct pci_device_id iwl_hw_card_ids[] = {
4698         {0x8086, 0x4229, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
4699         {0x8086, 0x4230, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
4700         {0}
4701 };
4702
4703 int iwl_eeprom_aqcuire_semaphore(struct iwl_priv *priv)
4704 {
4705         u16 count;
4706         int rc;
4707
4708         for (count = 0; count < EEPROM_SEM_RETRY_LIMIT; count++) {
4709                 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
4710                         CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM);
4711                 rc = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
4712                                         CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM,
4713                                         CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM,
4714                                         EEPROM_SEM_TIMEOUT);
4715                 if (rc >= 0) {
4716                         IWL_DEBUG_IO("Aqcuired semaphore after %d tries.\n",
4717                                 count+1);
4718                         return rc;
4719                 }
4720         }
4721
4722         return rc;
4723 }
4724
4725 inline void iwl_eeprom_release_semaphore(struct iwl_priv *priv)
4726 {
4727         iwl_clear_bit(priv, CSR_HW_IF_CONFIG_REG,
4728                 CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM);
4729 }
4730
4731
4732 MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids);