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 #include <asm/unaligned.h>
  40
  41 #include "iwl-4965.h"
  42 #include "iwl-helpers.h"
  43
  44 static void iwl4965_hw_card_show_info(struct iwl4965_priv *priv);
  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 iwl4965_rate_info iwl4965_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 #ifdef CONFIG_IWL4965_HT
  83
  84 static const u16 default_tid_to_tx_fifo[] = {
  85         IWL_TX_FIFO_AC1,
  86         IWL_TX_FIFO_AC0,
  87         IWL_TX_FIFO_AC0,
  88         IWL_TX_FIFO_AC1,
  89         IWL_TX_FIFO_AC2,
  90         IWL_TX_FIFO_AC2,
  91         IWL_TX_FIFO_AC3,
  92         IWL_TX_FIFO_AC3,
  93         IWL_TX_FIFO_NONE,
  94         IWL_TX_FIFO_NONE,
  95         IWL_TX_FIFO_NONE,
  96         IWL_TX_FIFO_NONE,
  97         IWL_TX_FIFO_NONE,
  98         IWL_TX_FIFO_NONE,
  99         IWL_TX_FIFO_NONE,
 100         IWL_TX_FIFO_NONE,
 101         IWL_TX_FIFO_AC3
 102 };
 103
 104 #endif  /*CONFIG_IWL4965_HT */
 105
 106 static int is_fat_channel(__le32 rxon_flags)
 107 {
 108         return (rxon_flags & RXON_FLG_CHANNEL_MODE_PURE_40_MSK) ||
 109                 (rxon_flags & RXON_FLG_CHANNEL_MODE_MIXED_MSK);
 110 }
 111
 112 static u8 is_single_stream(struct iwl4965_priv *priv)
 113 {
 114 #ifdef CONFIG_IWL4965_HT
 115         if (!priv->current_ht_config.is_ht ||
 116             (priv->current_ht_config.supp_mcs_set[1] == 0) ||
 117             (priv->ps_mode == IWL_MIMO_PS_STATIC))
 118                 return 1;
 119 #else
 120         return 1;
 121 #endif  /*CONFIG_IWL4965_HT */
 122         return 0;
 123 }
 124
 125 int iwl4965_hwrate_to_plcp_idx(u32 rate_n_flags)
 126 {
 127         int idx = 0;
 128
 129         /* 4965 HT rate format */
 130         if (rate_n_flags & RATE_MCS_HT_MSK) {
 131                 idx = (rate_n_flags & 0xff);
 132
 133                 if (idx >= IWL_RATE_MIMO_6M_PLCP)
 134                         idx = idx - IWL_RATE_MIMO_6M_PLCP;
 135
 136                 idx += IWL_FIRST_OFDM_RATE;
 137                 /* skip 9M not supported in ht*/
 138                 if (idx >= IWL_RATE_9M_INDEX)
 139                         idx += 1;
 140                 if ((idx >= IWL_FIRST_OFDM_RATE) && (idx <= IWL_LAST_OFDM_RATE))
 141                         return idx;
 142
 143         /* 4965 legacy rate format, search for match in table */
 144         } else {
 145                 for (idx = 0; idx < ARRAY_SIZE(iwl4965_rates); idx++)
 146                         if (iwl4965_rates[idx].plcp == (rate_n_flags & 0xFF))
 147                                 return idx;
 148         }
 149
 150         return -1;
 151 }
 152
 153
 154 /*
 155  * Determine how many receiver/antenna chains to use.
 156  * More provides better reception via diversity.  Fewer saves power.
 157  * MIMO (dual stream) requires at least 2, but works better with 3.
 158  * This does not determine *which* chains to use, just how many.
 159  */
 160 static int iwl4965_get_rx_chain_counter(struct iwl4965_priv *priv,
 161                                         u8 *idle_state, u8 *rx_state)
 162 {
 163         u8 is_single = is_single_stream(priv);
 164         u8 is_cam = test_bit(STATUS_POWER_PMI, &priv->status) ? 0 : 1;
 165
 166         /* # of Rx chains to use when expecting MIMO. */
 167         if (is_single || (!is_cam && (priv->ps_mode == IWL_MIMO_PS_STATIC)))
 168                 *rx_state = 2;
 169         else
 170                 *rx_state = 3;
 171
 172         /* # Rx chains when idling and maybe trying to save power */
 173         switch (priv->ps_mode) {
 174         case IWL_MIMO_PS_STATIC:
 175         case IWL_MIMO_PS_DYNAMIC:
 176                 *idle_state = (is_cam) ? 2 : 1;
 177                 break;
 178         case IWL_MIMO_PS_NONE:
 179                 *idle_state = (is_cam) ? *rx_state : 1;
 180                 break;
 181         default:
 182                 *idle_state = 1;
 183                 break;
 184         }
 185
 186         return 0;
 187 }
 188
 189 int iwl4965_hw_rxq_stop(struct iwl4965_priv *priv)
 190 {
 191         int rc;
 192         unsigned long flags;
 193
 194         spin_lock_irqsave(&priv->lock, flags);
 195         rc = iwl4965_grab_nic_access(priv);
 196         if (rc) {
 197                 spin_unlock_irqrestore(&priv->lock, flags);
 198                 return rc;
 199         }
 200
 201         /* stop Rx DMA */
 202         iwl4965_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0);
 203         rc = iwl4965_poll_direct_bit(priv, FH_MEM_RSSR_RX_STATUS_REG,
 204                                      (1 << 24), 1000);
 205         if (rc < 0)
 206                 IWL_ERROR("Can't stop Rx DMA.\n");
 207
 208         iwl4965_release_nic_access(priv);
 209         spin_unlock_irqrestore(&priv->lock, flags);
 210
 211         return 0;
 212 }
 213
 214 u8 iwl4965_hw_find_station(struct iwl4965_priv *priv, const u8 *addr)
 215 {
 216         int i;
 217         int start = 0;
 218         int ret = IWL_INVALID_STATION;
 219         unsigned long flags;
 220         DECLARE_MAC_BUF(mac);
 221
 222         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) ||
 223             (priv->iw_mode == IEEE80211_IF_TYPE_AP))
 224                 start = IWL_STA_ID;
 225
 226         if (is_broadcast_ether_addr(addr))
 227                 return IWL4965_BROADCAST_ID;
 228
 229         spin_lock_irqsave(&priv->sta_lock, flags);
 230         for (i = start; i < priv->hw_setting.max_stations; i++)
 231                 if ((priv->stations[i].used) &&
 232                     (!compare_ether_addr
 233                      (priv->stations[i].sta.sta.addr, addr))) {
 234                         ret = i;
 235                         goto out;
 236                 }
 237
 238         IWL_DEBUG_ASSOC_LIMIT("can not find STA %s total %d\n",
 239                         print_mac(mac, addr), priv->num_stations);
 240
 241  out:
 242         spin_unlock_irqrestore(&priv->sta_lock, flags);
 243         return ret;
 244 }
 245
 246 static int iwl4965_nic_set_pwr_src(struct iwl4965_priv *priv, int pwr_max)
 247 {
 248         int ret;
 249         unsigned long flags;
 250
 251         spin_lock_irqsave(&priv->lock, flags);
 252         ret = iwl4965_grab_nic_access(priv);
 253         if (ret) {
 254                 spin_unlock_irqrestore(&priv->lock, flags);
 255                 return ret;
 256         }
 257
 258         if (!pwr_max) {
 259                 u32 val;
 260
 261                 ret = pci_read_config_dword(priv->pci_dev, PCI_POWER_SOURCE,
 262                                            &val);
 263
 264                 if (val & PCI_CFG_PMC_PME_FROM_D3COLD_SUPPORT)
 265                         iwl4965_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 266                                 APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
 267                                 ~APMG_PS_CTRL_MSK_PWR_SRC);
 268         } else
 269                 iwl4965_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 270                         APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
 271                         ~APMG_PS_CTRL_MSK_PWR_SRC);
 272
 273         iwl4965_release_nic_access(priv);
 274         spin_unlock_irqrestore(&priv->lock, flags);
 275
 276         return ret;
 277 }
 278
 279 static int iwl4965_rx_init(struct iwl4965_priv *priv, struct iwl4965_rx_queue *rxq)
 280 {
 281         int rc;
 282         unsigned long flags;
 283         unsigned int rb_size;
 284
 285         spin_lock_irqsave(&priv->lock, flags);
 286         rc = iwl4965_grab_nic_access(priv);
 287         if (rc) {
 288                 spin_unlock_irqrestore(&priv->lock, flags);
 289                 return rc;
 290         }
 291
 292         if (iwl4965_param_amsdu_size_8K)
 293                 rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_8K;
 294         else
 295                 rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K;
 296
 297         /* Stop Rx DMA */
 298         iwl4965_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0);
 299
 300         /* Reset driver's Rx queue write index */
 301         iwl4965_write_direct32(priv, FH_RSCSR_CHNL0_RBDCB_WPTR_REG, 0);
 302
 303         /* Tell device where to find RBD circular buffer in DRAM */
 304         iwl4965_write_direct32(priv, FH_RSCSR_CHNL0_RBDCB_BASE_REG,
 305                              rxq->dma_addr >> 8);
 306
 307         /* Tell device where in DRAM to update its Rx status */
 308         iwl4965_write_direct32(priv, FH_RSCSR_CHNL0_STTS_WPTR_REG,
 309                              (priv->hw_setting.shared_phys +
 310                               offsetof(struct iwl4965_shared, val0)) >> 4);
 311
 312         /* Enable Rx DMA, enable host interrupt, Rx buffer size 4k, 256 RBDs */
 313         iwl4965_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG,
 314                              FH_RCSR_RX_CONFIG_CHNL_EN_ENABLE_VAL |
 315                              FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_INT_HOST_VAL |
 316                              rb_size |
 317                              /*0x10 << 4 | */
 318                              (RX_QUEUE_SIZE_LOG <<
 319                               FH_RCSR_RX_CONFIG_RBDCB_SIZE_BITSHIFT));
 320
 321         /*
 322          * iwl4965_write32(priv,CSR_INT_COAL_REG,0);
 323          */
 324
 325         iwl4965_release_nic_access(priv);
 326         spin_unlock_irqrestore(&priv->lock, flags);
 327
 328         return 0;
 329 }
 330
 331 /* Tell 4965 where to find the "keep warm" buffer */
 332 static int iwl4965_kw_init(struct iwl4965_priv *priv)
 333 {
 334         unsigned long flags;
 335         int rc;
 336
 337         spin_lock_irqsave(&priv->lock, flags);
 338         rc = iwl4965_grab_nic_access(priv);
 339         if (rc)
 340                 goto out;
 341
 342         iwl4965_write_direct32(priv, IWL_FH_KW_MEM_ADDR_REG,
 343                              priv->kw.dma_addr >> 4);
 344         iwl4965_release_nic_access(priv);
 345 out:
 346         spin_unlock_irqrestore(&priv->lock, flags);
 347         return rc;
 348 }
 349
 350 static int iwl4965_kw_alloc(struct iwl4965_priv *priv)
 351 {
 352         struct pci_dev *dev = priv->pci_dev;
 353         struct iwl4965_kw *kw = &priv->kw;
 354
 355         kw->size = IWL4965_KW_SIZE;     /* TBW need set somewhere else */
 356         kw->v_addr = pci_alloc_consistent(dev, kw->size, &kw->dma_addr);
 357         if (!kw->v_addr)
 358                 return -ENOMEM;
 359
 360         return 0;
 361 }
 362
 363 #define CHECK_AND_PRINT(x) ((eeprom_ch->flags & EEPROM_CHANNEL_##x) \
 364                             ? # x " " : "")
 365
 366 /**
 367  * iwl4965_set_fat_chan_info - Copy fat channel info into driver's priv.
 368  *
 369  * Does not set up a command, or touch hardware.
 370  */
 371 int iwl4965_set_fat_chan_info(struct iwl4965_priv *priv,
 372                               enum ieee80211_band band, u16 channel,
 373                               const struct iwl4965_eeprom_channel *eeprom_ch,
 374                               u8 fat_extension_channel)
 375 {
 376         struct iwl4965_channel_info *ch_info;
 377
 378         ch_info = (struct iwl4965_channel_info *)
 379                         iwl4965_get_channel_info(priv, band, channel);
 380
 381         if (!is_channel_valid(ch_info))
 382                 return -1;
 383
 384         IWL_DEBUG_INFO("FAT Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x"
 385                         " %ddBm): Ad-Hoc %ssupported\n",
 386                         ch_info->channel,
 387                         is_channel_a_band(ch_info) ?
 388                         "5.2" : "2.4",
 389                         CHECK_AND_PRINT(IBSS),
 390                         CHECK_AND_PRINT(ACTIVE),
 391                         CHECK_AND_PRINT(RADAR),
 392                         CHECK_AND_PRINT(WIDE),
 393                         CHECK_AND_PRINT(NARROW),
 394                         CHECK_AND_PRINT(DFS),
 395                         eeprom_ch->flags,
 396                         eeprom_ch->max_power_avg,
 397                         ((eeprom_ch->flags & EEPROM_CHANNEL_IBSS)
 398                          && !(eeprom_ch->flags & EEPROM_CHANNEL_RADAR)) ?
 399                         "" : "not ");
 400
 401         ch_info->fat_eeprom = *eeprom_ch;
 402         ch_info->fat_max_power_avg = eeprom_ch->max_power_avg;
 403         ch_info->fat_curr_txpow = eeprom_ch->max_power_avg;
 404         ch_info->fat_min_power = 0;
 405         ch_info->fat_scan_power = eeprom_ch->max_power_avg;
 406         ch_info->fat_flags = eeprom_ch->flags;
 407         ch_info->fat_extension_channel = fat_extension_channel;
 408
 409         return 0;
 410 }
 411
 412 /**
 413  * iwl4965_kw_free - Free the "keep warm" buffer
 414  */
 415 static void iwl4965_kw_free(struct iwl4965_priv *priv)
 416 {
 417         struct pci_dev *dev = priv->pci_dev;
 418         struct iwl4965_kw *kw = &priv->kw;
 419
 420         if (kw->v_addr) {
 421                 pci_free_consistent(dev, kw->size, kw->v_addr, kw->dma_addr);
 422                 memset(kw, 0, sizeof(*kw));
 423         }
 424 }
 425
 426 /**
 427  * iwl4965_txq_ctx_reset - Reset TX queue context
 428  * Destroys all DMA structures and initialise them again
 429  *
 430  * @param priv
 431  * @return error code
 432  */
 433 static int iwl4965_txq_ctx_reset(struct iwl4965_priv *priv)
 434 {
 435         int rc = 0;
 436         int txq_id, slots_num;
 437         unsigned long flags;
 438
 439         iwl4965_kw_free(priv);
 440
 441         /* Free all tx/cmd queues and keep-warm buffer */
 442         iwl4965_hw_txq_ctx_free(priv);
 443
 444         /* Alloc keep-warm buffer */
 445         rc = iwl4965_kw_alloc(priv);
 446         if (rc) {
 447                 IWL_ERROR("Keep Warm allocation failed");
 448                 goto error_kw;
 449         }
 450
 451         spin_lock_irqsave(&priv->lock, flags);
 452
 453         rc = iwl4965_grab_nic_access(priv);
 454         if (unlikely(rc)) {
 455                 IWL_ERROR("TX reset failed");
 456                 spin_unlock_irqrestore(&priv->lock, flags);
 457                 goto error_reset;
 458         }
 459
 460         /* Turn off all Tx DMA channels */
 461         iwl4965_write_prph(priv, KDR_SCD_TXFACT, 0);
 462         iwl4965_release_nic_access(priv);
 463         spin_unlock_irqrestore(&priv->lock, flags);
 464
 465         /* Tell 4965 where to find the keep-warm buffer */
 466         rc = iwl4965_kw_init(priv);
 467         if (rc) {
 468                 IWL_ERROR("kw_init failed\n");
 469                 goto error_reset;
 470         }
 471
 472         /* Alloc and init all (default 16) Tx queues,
 473          * including the command queue (#4) */
 474         for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++) {
 475                 slots_num = (txq_id == IWL_CMD_QUEUE_NUM) ?
 476                                         TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS;
 477                 rc = iwl4965_tx_queue_init(priv, &priv->txq[txq_id], slots_num,
 478                                        txq_id);
 479                 if (rc) {
 480                         IWL_ERROR("Tx %d queue init failed\n", txq_id);
 481                         goto error;
 482                 }
 483         }
 484
 485         return rc;
 486
 487  error:
 488         iwl4965_hw_txq_ctx_free(priv);
 489  error_reset:
 490         iwl4965_kw_free(priv);
 491  error_kw:
 492         return rc;
 493 }
 494
 495 int iwl4965_hw_nic_init(struct iwl4965_priv *priv)
 496 {
 497         int rc;
 498         unsigned long flags;
 499         struct iwl4965_rx_queue *rxq = &priv->rxq;
 500         u8 rev_id;
 501         u32 val;
 502         u8 val_link;
 503
 504         iwl4965_power_init_handle(priv);
 505
 506         /* nic_init */
 507         spin_lock_irqsave(&priv->lock, flags);
 508
 509         iwl4965_set_bit(priv, CSR_GIO_CHICKEN_BITS,
 510                     CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
 511
 512         iwl4965_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 513         rc = iwl4965_poll_bit(priv, CSR_GP_CNTRL,
 514                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
 515                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
 516         if (rc < 0) {
 517                 spin_unlock_irqrestore(&priv->lock, flags);
 518                 IWL_DEBUG_INFO("Failed to init the card\n");
 519                 return rc;
 520         }
 521
 522         rc = iwl4965_grab_nic_access(priv);
 523         if (rc) {
 524                 spin_unlock_irqrestore(&priv->lock, flags);
 525                 return rc;
 526         }
 527
 528         iwl4965_read_prph(priv, APMG_CLK_CTRL_REG);
 529
 530         iwl4965_write_prph(priv, APMG_CLK_CTRL_REG,
 531                                  APMG_CLK_VAL_DMA_CLK_RQT |
 532                                  APMG_CLK_VAL_BSM_CLK_RQT);
 533         iwl4965_read_prph(priv, APMG_CLK_CTRL_REG);
 534
 535         udelay(20);
 536
 537         iwl4965_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
 538                                     APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
 539
 540         iwl4965_release_nic_access(priv);
 541         iwl4965_write32(priv, CSR_INT_COALESCING, 512 / 32);
 542         spin_unlock_irqrestore(&priv->lock, flags);
 543
 544         /* Determine HW type */
 545         rc = pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &rev_id);
 546         if (rc)
 547                 return rc;
 548
 549         IWL_DEBUG_INFO("HW Revision ID = 0x%X\n", rev_id);
 550
 551         iwl4965_nic_set_pwr_src(priv, 1);
 552         spin_lock_irqsave(&priv->lock, flags);
 553
 554         if ((rev_id & 0x80) == 0x80 && (rev_id & 0x7f) < 8) {
 555                 pci_read_config_dword(priv->pci_dev, PCI_REG_WUM8, &val);
 556                 /* Enable No Snoop field */
 557                 pci_write_config_dword(priv->pci_dev, PCI_REG_WUM8,
 558                                        val & ~(1 << 11));
 559         }
 560
 561         spin_unlock_irqrestore(&priv->lock, flags);
 562
 563         if (priv->eeprom.calib_version < EEPROM_TX_POWER_VERSION_NEW) {
 564                 IWL_ERROR("Older EEPROM detected!  Aborting.\n");
 565                 return -EINVAL;
 566         }
 567
 568         pci_read_config_byte(priv->pci_dev, PCI_LINK_CTRL, &val_link);
 569
 570         /* disable L1 entry -- workaround for pre-B1 */
 571         pci_write_config_byte(priv->pci_dev, PCI_LINK_CTRL, val_link & ~0x02);
 572
 573         spin_lock_irqsave(&priv->lock, flags);
 574
 575         /* set CSR_HW_CONFIG_REG for uCode use */
 576
 577         iwl4965_set_bit(priv, CSR_HW_IF_CONFIG_REG,
 578                         CSR_HW_IF_CONFIG_REG_BIT_KEDRON_R |
 579                         CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
 580                         CSR_HW_IF_CONFIG_REG_BIT_MAC_SI);
 581
 582         rc = iwl4965_grab_nic_access(priv);
 583         if (rc < 0) {
 584                 spin_unlock_irqrestore(&priv->lock, flags);
 585                 IWL_DEBUG_INFO("Failed to init the card\n");
 586                 return rc;
 587         }
 588
 589         iwl4965_read_prph(priv, APMG_PS_CTRL_REG);
 590         iwl4965_set_bits_prph(priv, APMG_PS_CTRL_REG,
 591                                     APMG_PS_CTRL_VAL_RESET_REQ);
 592         udelay(5);
 593         iwl4965_clear_bits_prph(priv, APMG_PS_CTRL_REG,
 594                                       APMG_PS_CTRL_VAL_RESET_REQ);
 595
 596         iwl4965_release_nic_access(priv);
 597         spin_unlock_irqrestore(&priv->lock, flags);
 598
 599         iwl4965_hw_card_show_info(priv);
 600
 601         /* end nic_init */
 602
 603         /* Allocate the RX queue, or reset if it is already allocated */
 604         if (!rxq->bd) {
 605                 rc = iwl4965_rx_queue_alloc(priv);
 606                 if (rc) {
 607                         IWL_ERROR("Unable to initialize Rx queue\n");
 608                         return -ENOMEM;
 609                 }
 610         } else
 611                 iwl4965_rx_queue_reset(priv, rxq);
 612
 613         iwl4965_rx_replenish(priv);
 614
 615         iwl4965_rx_init(priv, rxq);
 616
 617         spin_lock_irqsave(&priv->lock, flags);
 618
 619         rxq->need_update = 1;
 620         iwl4965_rx_queue_update_write_ptr(priv, rxq);
 621
 622         spin_unlock_irqrestore(&priv->lock, flags);
 623
 624         /* Allocate and init all Tx and Command queues */
 625         rc = iwl4965_txq_ctx_reset(priv);
 626         if (rc)
 627                 return rc;
 628
 629         if (priv->eeprom.sku_cap & EEPROM_SKU_CAP_SW_RF_KILL_ENABLE)
 630                 IWL_DEBUG_RF_KILL("SW RF KILL supported in EEPROM.\n");
 631
 632         if (priv->eeprom.sku_cap & EEPROM_SKU_CAP_HW_RF_KILL_ENABLE)
 633                 IWL_DEBUG_RF_KILL("HW RF KILL supported in EEPROM.\n");
 634
 635         set_bit(STATUS_INIT, &priv->status);
 636
 637         return 0;
 638 }
 639
 640 int iwl4965_hw_nic_stop_master(struct iwl4965_priv *priv)
 641 {
 642         int rc = 0;
 643         u32 reg_val;
 644         unsigned long flags;
 645
 646         spin_lock_irqsave(&priv->lock, flags);
 647
 648         /* set stop master bit */
 649         iwl4965_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
 650
 651         reg_val = iwl4965_read32(priv, CSR_GP_CNTRL);
 652
 653         if (CSR_GP_CNTRL_REG_FLAG_MAC_POWER_SAVE ==
 654             (reg_val & CSR_GP_CNTRL_REG_MSK_POWER_SAVE_TYPE))
 655                 IWL_DEBUG_INFO("Card in power save, master is already "
 656                                "stopped\n");
 657         else {
 658                 rc = iwl4965_poll_bit(priv, CSR_RESET,
 659                                   CSR_RESET_REG_FLAG_MASTER_DISABLED,
 660                                   CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
 661                 if (rc < 0) {
 662                         spin_unlock_irqrestore(&priv->lock, flags);
 663                         return rc;
 664                 }
 665         }
 666
 667         spin_unlock_irqrestore(&priv->lock, flags);
 668         IWL_DEBUG_INFO("stop master\n");
 669
 670         return rc;
 671 }
 672
 673 /**
 674  * iwl4965_hw_txq_ctx_stop - Stop all Tx DMA channels, free Tx queue memory
 675  */
 676 void iwl4965_hw_txq_ctx_stop(struct iwl4965_priv *priv)
 677 {
 678
 679         int txq_id;
 680         unsigned long flags;
 681
 682         /* Stop each Tx DMA channel, and wait for it to be idle */
 683         for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++) {
 684                 spin_lock_irqsave(&priv->lock, flags);
 685                 if (iwl4965_grab_nic_access(priv)) {
 686                         spin_unlock_irqrestore(&priv->lock, flags);
 687                         continue;
 688                 }
 689
 690                 iwl4965_write_direct32(priv,
 691                                      IWL_FH_TCSR_CHNL_TX_CONFIG_REG(txq_id),
 692                                      0x0);
 693                 iwl4965_poll_direct_bit(priv, IWL_FH_TSSR_TX_STATUS_REG,
 694                                         IWL_FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE
 695                                         (txq_id), 200);
 696                 iwl4965_release_nic_access(priv);
 697                 spin_unlock_irqrestore(&priv->lock, flags);
 698         }
 699
 700         /* Deallocate memory for all Tx queues */
 701         iwl4965_hw_txq_ctx_free(priv);
 702 }
 703
 704 int iwl4965_hw_nic_reset(struct iwl4965_priv *priv)
 705 {
 706         int rc = 0;
 707         unsigned long flags;
 708
 709         iwl4965_hw_nic_stop_master(priv);
 710
 711         spin_lock_irqsave(&priv->lock, flags);
 712
 713         iwl4965_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
 714
 715         udelay(10);
 716
 717         iwl4965_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 718         rc = iwl4965_poll_bit(priv, CSR_RESET,
 719                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
 720                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25);
 721
 722         udelay(10);
 723
 724         rc = iwl4965_grab_nic_access(priv);
 725         if (!rc) {
 726                 iwl4965_write_prph(priv, APMG_CLK_EN_REG,
 727                                          APMG_CLK_VAL_DMA_CLK_RQT |
 728                                          APMG_CLK_VAL_BSM_CLK_RQT);
 729
 730                 udelay(10);
 731
 732                 iwl4965_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
 733                                 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
 734
 735                 iwl4965_release_nic_access(priv);
 736         }
 737
 738         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
 739         wake_up_interruptible(&priv->wait_command_queue);
 740
 741         spin_unlock_irqrestore(&priv->lock, flags);
 742
 743         return rc;
 744
 745 }
 746
 747 #define REG_RECALIB_PERIOD (60)
 748
 749 /**
 750  * iwl4965_bg_statistics_periodic - Timer callback to queue statistics
 751  *
 752  * This callback is provided in order to queue the statistics_work
 753  * in work_queue context (v. softirq)
 754  *
 755  * This timer function is continually reset to execute within
 756  * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
 757  * was received.  We need to ensure we receive the statistics in order
 758  * to update the temperature used for calibrating the TXPOWER.  However,
 759  * we can't send the statistics command from softirq context (which
 760  * is the context which timers run at) so we have to queue off the
 761  * statistics_work to actually send the command to the hardware.
 762  */
 763 static void iwl4965_bg_statistics_periodic(unsigned long data)
 764 {
 765         struct iwl4965_priv *priv = (struct iwl4965_priv *)data;
 766
 767         queue_work(priv->workqueue, &priv->statistics_work);
 768 }
 769
 770 /**
 771  * iwl4965_bg_statistics_work - Send the statistics request to the hardware.
 772  *
 773  * This is queued by iwl4965_bg_statistics_periodic.
 774  */
 775 static void iwl4965_bg_statistics_work(struct work_struct *work)
 776 {
 777         struct iwl4965_priv *priv = container_of(work, struct iwl4965_priv,
 778                                              statistics_work);
 779
 780         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 781                 return;
 782
 783         mutex_lock(&priv->mutex);
 784         iwl4965_send_statistics_request(priv);
 785         mutex_unlock(&priv->mutex);
 786 }
 787
 788 #define CT_LIMIT_CONST          259
 789 #define TM_CT_KILL_THRESHOLD    110
 790
 791 void iwl4965_rf_kill_ct_config(struct iwl4965_priv *priv)
 792 {
 793         struct iwl4965_ct_kill_config cmd;
 794         u32 R1, R2, R3;
 795         u32 temp_th;
 796         u32 crit_temperature;
 797         unsigned long flags;
 798         int rc = 0;
 799
 800         spin_lock_irqsave(&priv->lock, flags);
 801         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_CLR,
 802                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
 803         spin_unlock_irqrestore(&priv->lock, flags);
 804
 805         if (priv->statistics.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK) {
 806                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[1]);
 807                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[1]);
 808                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[1]);
 809         } else {
 810                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[0]);
 811                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[0]);
 812                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[0]);
 813         }
 814
 815         temp_th = CELSIUS_TO_KELVIN(TM_CT_KILL_THRESHOLD);
 816
 817         crit_temperature = ((temp_th * (R3-R1))/CT_LIMIT_CONST) + R2;
 818         cmd.critical_temperature_R =  cpu_to_le32(crit_temperature);
 819         rc = iwl4965_send_cmd_pdu(priv,
 820                               REPLY_CT_KILL_CONFIG_CMD, sizeof(cmd), &cmd);
 821         if (rc)
 822                 IWL_ERROR("REPLY_CT_KILL_CONFIG_CMD failed\n");
 823         else
 824                 IWL_DEBUG_INFO("REPLY_CT_KILL_CONFIG_CMD succeeded\n");
 825 }
 826
 827 #ifdef CONFIG_IWL4965_SENSITIVITY
 828
 829 /* "false alarms" are signals that our DSP tries to lock onto,
 830  *   but then determines that they are either noise, or transmissions
 831  *   from a distant wireless network (also "noise", really) that get
 832  *   "stepped on" by stronger transmissions within our own network.
 833  * This algorithm attempts to set a sensitivity level that is high
 834  *   enough to receive all of our own network traffic, but not so
 835  *   high that our DSP gets too busy trying to lock onto non-network
 836  *   activity/noise. */
 837 static int iwl4965_sens_energy_cck(struct iwl4965_priv *priv,
 838                                    u32 norm_fa,
 839                                    u32 rx_enable_time,
 840                                    struct statistics_general_data *rx_info)
 841 {
 842         u32 max_nrg_cck = 0;
 843         int i = 0;
 844         u8 max_silence_rssi = 0;
 845         u32 silence_ref = 0;
 846         u8 silence_rssi_a = 0;
 847         u8 silence_rssi_b = 0;
 848         u8 silence_rssi_c = 0;
 849         u32 val;
 850
 851         /* "false_alarms" values below are cross-multiplications to assess the
 852          *   numbers of false alarms within the measured period of actual Rx
 853          *   (Rx is off when we're txing), vs the min/max expected false alarms
 854          *   (some should be expected if rx is sensitive enough) in a
 855          *   hypothetical listening period of 200 time units (TU), 204.8 msec:
 856          *
 857          * MIN_FA/fixed-time < false_alarms/actual-rx-time < MAX_FA/beacon-time
 858          *
 859          * */
 860         u32 false_alarms = norm_fa * 200 * 1024;
 861         u32 max_false_alarms = MAX_FA_CCK * rx_enable_time;
 862         u32 min_false_alarms = MIN_FA_CCK * rx_enable_time;
 863         struct iwl4965_sensitivity_data *data = NULL;
 864
 865         data = &(priv->sensitivity_data);
 866
 867         data->nrg_auto_corr_silence_diff = 0;
 868
 869         /* Find max silence rssi among all 3 receivers.
 870          * This is background noise, which may include transmissions from other
 871          *    networks, measured during silence before our network's beacon */
 872         silence_rssi_a = (u8)((rx_info->beacon_silence_rssi_a &
 873                             ALL_BAND_FILTER) >> 8);
 874         silence_rssi_b = (u8)((rx_info->beacon_silence_rssi_b &
 875                             ALL_BAND_FILTER) >> 8);
 876         silence_rssi_c = (u8)((rx_info->beacon_silence_rssi_c &
 877                             ALL_BAND_FILTER) >> 8);
 878
 879         val = max(silence_rssi_b, silence_rssi_c);
 880         max_silence_rssi = max(silence_rssi_a, (u8) val);
 881
 882         /* Store silence rssi in 20-beacon history table */
 883         data->nrg_silence_rssi[data->nrg_silence_idx] = max_silence_rssi;
 884         data->nrg_silence_idx++;
 885         if (data->nrg_silence_idx >= NRG_NUM_PREV_STAT_L)
 886                 data->nrg_silence_idx = 0;
 887
 888         /* Find max silence rssi across 20 beacon history */
 889         for (i = 0; i < NRG_NUM_PREV_STAT_L; i++) {
 890                 val = data->nrg_silence_rssi[i];
 891                 silence_ref = max(silence_ref, val);
 892         }
 893         IWL_DEBUG_CALIB("silence a %u, b %u, c %u, 20-bcn max %u\n",
 894                         silence_rssi_a, silence_rssi_b, silence_rssi_c,
 895                         silence_ref);
 896
 897         /* Find max rx energy (min value!) among all 3 receivers,
 898          *   measured during beacon frame.
 899          * Save it in 10-beacon history table. */
 900         i = data->nrg_energy_idx;
 901         val = min(rx_info->beacon_energy_b, rx_info->beacon_energy_c);
 902         data->nrg_value[i] = min(rx_info->beacon_energy_a, val);
 903
 904         data->nrg_energy_idx++;
 905         if (data->nrg_energy_idx >= 10)
 906                 data->nrg_energy_idx = 0;
 907
 908         /* Find min rx energy (max value) across 10 beacon history.
 909          * This is the minimum signal level that we want to receive well.
 910          * Add backoff (margin so we don't miss slightly lower energy frames).
 911          * This establishes an upper bound (min value) for energy threshold. */
 912         max_nrg_cck = data->nrg_value[0];
 913         for (i = 1; i < 10; i++)
 914                 max_nrg_cck = (u32) max(max_nrg_cck, (data->nrg_value[i]));
 915         max_nrg_cck += 6;
 916
 917         IWL_DEBUG_CALIB("rx energy a %u, b %u, c %u, 10-bcn max/min %u\n",
 918                         rx_info->beacon_energy_a, rx_info->beacon_energy_b,
 919                         rx_info->beacon_energy_c, max_nrg_cck - 6);
 920
 921         /* Count number of consecutive beacons with fewer-than-desired
 922          *   false alarms. */
 923         if (false_alarms < min_false_alarms)
 924                 data->num_in_cck_no_fa++;
 925         else
 926                 data->num_in_cck_no_fa = 0;
 927         IWL_DEBUG_CALIB("consecutive bcns with few false alarms = %u\n",
 928                         data->num_in_cck_no_fa);
 929
 930         /* If we got too many false alarms this time, reduce sensitivity */
 931         if (false_alarms > max_false_alarms) {
 932                 IWL_DEBUG_CALIB("norm FA %u > max FA %u\n",
 933                              false_alarms, max_false_alarms);
 934                 IWL_DEBUG_CALIB("... reducing sensitivity\n");
 935                 data->nrg_curr_state = IWL_FA_TOO_MANY;
 936
 937                 if (data->auto_corr_cck > AUTO_CORR_MAX_TH_CCK) {
 938                         /* Store for "fewer than desired" on later beacon */
 939                         data->nrg_silence_ref = silence_ref;
 940
 941                         /* increase energy threshold (reduce nrg value)
 942                          *   to decrease sensitivity */
 943                         if (data->nrg_th_cck > (NRG_MAX_CCK + NRG_STEP_CCK))
 944                                 data->nrg_th_cck = data->nrg_th_cck
 945                                                          - NRG_STEP_CCK;
 946                 }
 947
 948                 /* increase auto_corr values to decrease sensitivity */
 949                 if (data->auto_corr_cck < AUTO_CORR_MAX_TH_CCK)
 950                         data->auto_corr_cck = AUTO_CORR_MAX_TH_CCK + 1;
 951                 else {
 952                         val = data->auto_corr_cck + AUTO_CORR_STEP_CCK;
 953                         data->auto_corr_cck = min((u32)AUTO_CORR_MAX_CCK, val);
 954                 }
 955                 val = data->auto_corr_cck_mrc + AUTO_CORR_STEP_CCK;
 956                 data->auto_corr_cck_mrc = min((u32)AUTO_CORR_MAX_CCK_MRC, val);
 957
 958         /* Else if we got fewer than desired, increase sensitivity */
 959         } else if (false_alarms < min_false_alarms) {
 960                 data->nrg_curr_state = IWL_FA_TOO_FEW;
 961
 962                 /* Compare silence level with silence level for most recent
 963                  *   healthy number or too many false alarms */
 964                 data->nrg_auto_corr_silence_diff = (s32)data->nrg_silence_ref -
 965                                                    (s32)silence_ref;
 966
 967                 IWL_DEBUG_CALIB("norm FA %u < min FA %u, silence diff %d\n",
 968                          false_alarms, min_false_alarms,
 969                          data->nrg_auto_corr_silence_diff);
 970
 971                 /* Increase value to increase sensitivity, but only if:
 972                  * 1a) previous beacon did *not* have *too many* false alarms
 973                  * 1b) AND there's a significant difference in Rx levels
 974                  *      from a previous beacon with too many, or healthy # FAs
 975                  * OR 2) We've seen a lot of beacons (100) with too few
 976                  *       false alarms */
 977                 if ((data->nrg_prev_state != IWL_FA_TOO_MANY) &&
 978                         ((data->nrg_auto_corr_silence_diff > NRG_DIFF) ||
 979                         (data->num_in_cck_no_fa > MAX_NUMBER_CCK_NO_FA))) {
 980
 981                         IWL_DEBUG_CALIB("... increasing sensitivity\n");
 982                         /* Increase nrg value to increase sensitivity */
 983                         val = data->nrg_th_cck + NRG_STEP_CCK;
 984                         data->nrg_th_cck = min((u32)NRG_MIN_CCK, val);
 985
 986                         /* Decrease auto_corr values to increase sensitivity */
 987                         val = data->auto_corr_cck - AUTO_CORR_STEP_CCK;
 988                         data->auto_corr_cck = max((u32)AUTO_CORR_MIN_CCK, val);
 989
 990                         val = data->auto_corr_cck_mrc - AUTO_CORR_STEP_CCK;
 991                         data->auto_corr_cck_mrc =
 992                                          max((u32)AUTO_CORR_MIN_CCK_MRC, val);
 993
 994                 } else
 995                         IWL_DEBUG_CALIB("... but not changing sensitivity\n");
 996
 997         /* Else we got a healthy number of false alarms, keep status quo */
 998         } else {
 999                 IWL_DEBUG_CALIB(" FA in safe zone\n");
1000                 data->nrg_curr_state = IWL_FA_GOOD_RANGE;
1001
1002                 /* Store for use in "fewer than desired" with later beacon */
1003                 data->nrg_silence_ref = silence_ref;
1004
1005                 /* If previous beacon had too many false alarms,
1006                  *   give it some extra margin by reducing sensitivity again
1007                  *   (but don't go below measured energy of desired Rx) */
1008                 if (IWL_FA_TOO_MANY == data->nrg_prev_state) {
1009                         IWL_DEBUG_CALIB("... increasing margin\n");
1010                         data->nrg_th_cck -= NRG_MARGIN;
1011                 }
1012         }
1013
1014         /* Make sure the energy threshold does not go above the measured
1015          * energy of the desired Rx signals (reduced by backoff margin),
1016          * or else we might start missing Rx frames.
1017          * Lower value is higher energy, so we use max()!
1018          */
1019         data->nrg_th_cck = max(max_nrg_cck, data->nrg_th_cck);
1020         IWL_DEBUG_CALIB("new nrg_th_cck %u\n", data->nrg_th_cck);
1021
1022         data->nrg_prev_state = data->nrg_curr_state;
1023
1024         return 0;
1025 }
1026
1027
1028 static int iwl4965_sens_auto_corr_ofdm(struct iwl4965_priv *priv,
1029                                        u32 norm_fa,
1030                                        u32 rx_enable_time)
1031 {
1032         u32 val;
1033         u32 false_alarms = norm_fa * 200 * 1024;
1034         u32 max_false_alarms = MAX_FA_OFDM * rx_enable_time;
1035         u32 min_false_alarms = MIN_FA_OFDM * rx_enable_time;
1036         struct iwl4965_sensitivity_data *data = NULL;
1037
1038         data = &(priv->sensitivity_data);
1039
1040         /* If we got too many false alarms this time, reduce sensitivity */
1041         if (false_alarms > max_false_alarms) {
1042
1043                 IWL_DEBUG_CALIB("norm FA %u > max FA %u)\n",
1044                              false_alarms, max_false_alarms);
1045
1046                 val = data->auto_corr_ofdm + AUTO_CORR_STEP_OFDM;
1047                 data->auto_corr_ofdm =
1048                                 min((u32)AUTO_CORR_MAX_OFDM, val);
1049
1050                 val = data->auto_corr_ofdm_mrc + AUTO_CORR_STEP_OFDM;
1051                 data->auto_corr_ofdm_mrc =
1052                                 min((u32)AUTO_CORR_MAX_OFDM_MRC, val);
1053
1054                 val = data->auto_corr_ofdm_x1 + AUTO_CORR_STEP_OFDM;
1055                 data->auto_corr_ofdm_x1 =
1056                                 min((u32)AUTO_CORR_MAX_OFDM_X1, val);
1057
1058                 val = data->auto_corr_ofdm_mrc_x1 + AUTO_CORR_STEP_OFDM;
1059                 data->auto_corr_ofdm_mrc_x1 =
1060                                 min((u32)AUTO_CORR_MAX_OFDM_MRC_X1, val);
1061         }
1062
1063         /* Else if we got fewer than desired, increase sensitivity */
1064         else if (false_alarms < min_false_alarms) {
1065
1066                 IWL_DEBUG_CALIB("norm FA %u < min FA %u\n",
1067                              false_alarms, min_false_alarms);
1068
1069                 val = data->auto_corr_ofdm - AUTO_CORR_STEP_OFDM;
1070                 data->auto_corr_ofdm =
1071                                 max((u32)AUTO_CORR_MIN_OFDM, val);
1072
1073                 val = data->auto_corr_ofdm_mrc - AUTO_CORR_STEP_OFDM;
1074                 data->auto_corr_ofdm_mrc =
1075                                 max((u32)AUTO_CORR_MIN_OFDM_MRC, val);
1076
1077                 val = data->auto_corr_ofdm_x1 - AUTO_CORR_STEP_OFDM;
1078                 data->auto_corr_ofdm_x1 =
1079                                 max((u32)AUTO_CORR_MIN_OFDM_X1, val);
1080
1081                 val = data->auto_corr_ofdm_mrc_x1 - AUTO_CORR_STEP_OFDM;
1082                 data->auto_corr_ofdm_mrc_x1 =
1083                                 max((u32)AUTO_CORR_MIN_OFDM_MRC_X1, val);
1084         }
1085
1086         else
1087                 IWL_DEBUG_CALIB("min FA %u < norm FA %u < max FA %u OK\n",
1088                          min_false_alarms, false_alarms, max_false_alarms);
1089
1090         return 0;
1091 }
1092
1093 static int iwl4965_sensitivity_callback(struct iwl4965_priv *priv,
1094                                     struct iwl4965_cmd *cmd, struct sk_buff *skb)
1095 {
1096         /* We didn't cache the SKB; let the caller free it */
1097         return 1;
1098 }
1099
1100 /* Prepare a SENSITIVITY_CMD, send to uCode if values have changed */
1101 static int iwl4965_sensitivity_write(struct iwl4965_priv *priv, u8 flags)
1102 {
1103         int rc = 0;
1104         struct iwl4965_sensitivity_cmd cmd ;
1105         struct iwl4965_sensitivity_data *data = NULL;
1106         struct iwl4965_host_cmd cmd_out = {
1107                 .id = SENSITIVITY_CMD,
1108                 .len = sizeof(struct iwl4965_sensitivity_cmd),
1109                 .meta.flags = flags,
1110                 .data = &cmd,
1111         };
1112
1113         data = &(priv->sensitivity_data);
1114
1115         memset(&cmd, 0, sizeof(cmd));
1116
1117         cmd.table[HD_AUTO_CORR32_X4_TH_ADD_MIN_INDEX] =
1118                                 cpu_to_le16((u16)data->auto_corr_ofdm);
1119         cmd.table[HD_AUTO_CORR32_X4_TH_ADD_MIN_MRC_INDEX] =
1120                                 cpu_to_le16((u16)data->auto_corr_ofdm_mrc);
1121         cmd.table[HD_AUTO_CORR32_X1_TH_ADD_MIN_INDEX] =
1122                                 cpu_to_le16((u16)data->auto_corr_ofdm_x1);
1123         cmd.table[HD_AUTO_CORR32_X1_TH_ADD_MIN_MRC_INDEX] =
1124                                 cpu_to_le16((u16)data->auto_corr_ofdm_mrc_x1);
1125
1126         cmd.table[HD_AUTO_CORR40_X4_TH_ADD_MIN_INDEX] =
1127                                 cpu_to_le16((u16)data->auto_corr_cck);
1128         cmd.table[HD_AUTO_CORR40_X4_TH_ADD_MIN_MRC_INDEX] =
1129                                 cpu_to_le16((u16)data->auto_corr_cck_mrc);
1130
1131         cmd.table[HD_MIN_ENERGY_CCK_DET_INDEX] =
1132                                 cpu_to_le16((u16)data->nrg_th_cck);
1133         cmd.table[HD_MIN_ENERGY_OFDM_DET_INDEX] =
1134                                 cpu_to_le16((u16)data->nrg_th_ofdm);
1135
1136         cmd.table[HD_BARKER_CORR_TH_ADD_MIN_INDEX] =
1137                                 __constant_cpu_to_le16(190);
1138         cmd.table[HD_BARKER_CORR_TH_ADD_MIN_MRC_INDEX] =
1139                                 __constant_cpu_to_le16(390);
1140         cmd.table[HD_OFDM_ENERGY_TH_IN_INDEX] =
1141                                 __constant_cpu_to_le16(62);
1142
1143         IWL_DEBUG_CALIB("ofdm: ac %u mrc %u x1 %u mrc_x1 %u thresh %u\n",
1144                         data->auto_corr_ofdm, data->auto_corr_ofdm_mrc,
1145                         data->auto_corr_ofdm_x1, data->auto_corr_ofdm_mrc_x1,
1146                         data->nrg_th_ofdm);
1147
1148         IWL_DEBUG_CALIB("cck: ac %u mrc %u thresh %u\n",
1149                         data->auto_corr_cck, data->auto_corr_cck_mrc,
1150                         data->nrg_th_cck);
1151
1152         /* Update uCode's "work" table, and copy it to DSP */
1153         cmd.control = SENSITIVITY_CMD_CONTROL_WORK_TABLE;
1154
1155         if (flags & CMD_ASYNC)
1156                 cmd_out.meta.u.callback = iwl4965_sensitivity_callback;
1157
1158         /* Don't send command to uCode if nothing has changed */
1159         if (!memcmp(&cmd.table[0], &(priv->sensitivity_tbl[0]),
1160                     sizeof(u16)*HD_TABLE_SIZE)) {
1161                 IWL_DEBUG_CALIB("No change in SENSITIVITY_CMD\n");
1162                 return 0;
1163         }
1164
1165         /* Copy table for comparison next time */
1166         memcpy(&(priv->sensitivity_tbl[0]), &(cmd.table[0]),
1167                sizeof(u16)*HD_TABLE_SIZE);
1168
1169         rc = iwl4965_send_cmd(priv, &cmd_out);
1170         if (!rc) {
1171                 IWL_DEBUG_CALIB("SENSITIVITY_CMD succeeded\n");
1172                 return rc;
1173         }
1174
1175         return 0;
1176 }
1177
1178 void iwl4965_init_sensitivity(struct iwl4965_priv *priv, u8 flags, u8 force)
1179 {
1180         int rc = 0;
1181         int i;
1182         struct iwl4965_sensitivity_data *data = NULL;
1183
1184         IWL_DEBUG_CALIB("Start iwl4965_init_sensitivity\n");
1185
1186         if (force)
1187                 memset(&(priv->sensitivity_tbl[0]), 0,
1188                         sizeof(u16)*HD_TABLE_SIZE);
1189
1190         /* Clear driver's sensitivity algo data */
1191         data = &(priv->sensitivity_data);
1192         memset(data, 0, sizeof(struct iwl4965_sensitivity_data));
1193
1194         data->num_in_cck_no_fa = 0;
1195         data->nrg_curr_state = IWL_FA_TOO_MANY;
1196         data->nrg_prev_state = IWL_FA_TOO_MANY;
1197         data->nrg_silence_ref = 0;
1198         data->nrg_silence_idx = 0;
1199         data->nrg_energy_idx = 0;
1200
1201         for (i = 0; i < 10; i++)
1202                 data->nrg_value[i] = 0;
1203
1204         for (i = 0; i < NRG_NUM_PREV_STAT_L; i++)
1205                 data->nrg_silence_rssi[i] = 0;
1206
1207         data->auto_corr_ofdm = 90;
1208         data->auto_corr_ofdm_mrc = 170;
1209         data->auto_corr_ofdm_x1  = 105;
1210         data->auto_corr_ofdm_mrc_x1 = 220;
1211         data->auto_corr_cck = AUTO_CORR_CCK_MIN_VAL_DEF;
1212         data->auto_corr_cck_mrc = 200;
1213         data->nrg_th_cck = 100;
1214         data->nrg_th_ofdm = 100;
1215
1216         data->last_bad_plcp_cnt_ofdm = 0;
1217         data->last_fa_cnt_ofdm = 0;
1218         data->last_bad_plcp_cnt_cck = 0;
1219         data->last_fa_cnt_cck = 0;
1220
1221         /* Clear prior Sensitivity command data to force send to uCode */
1222         if (force)
1223                 memset(&(priv->sensitivity_tbl[0]), 0,
1224                     sizeof(u16)*HD_TABLE_SIZE);
1225
1226         rc |= iwl4965_sensitivity_write(priv, flags);
1227         IWL_DEBUG_CALIB("<<return 0x%X\n", rc);
1228
1229         return;
1230 }
1231
1232
1233 /* Reset differential Rx gains in NIC to prepare for chain noise calibration.
1234  * Called after every association, but this runs only once!
1235  *  ... once chain noise is calibrated the first time, it's good forever.  */
1236 void iwl4965_chain_noise_reset(struct iwl4965_priv *priv)
1237 {
1238         struct iwl4965_chain_noise_data *data = NULL;
1239         int rc = 0;
1240
1241         data = &(priv->chain_noise_data);
1242         if ((data->state == IWL_CHAIN_NOISE_ALIVE) && iwl4965_is_associated(priv)) {
1243                 struct iwl4965_calibration_cmd cmd;
1244
1245                 memset(&cmd, 0, sizeof(cmd));
1246                 cmd.opCode = PHY_CALIBRATE_DIFF_GAIN_CMD;
1247                 cmd.diff_gain_a = 0;
1248                 cmd.diff_gain_b = 0;
1249                 cmd.diff_gain_c = 0;
1250                 rc = iwl4965_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
1251                                  sizeof(cmd), &cmd);
1252                 msleep(4);
1253                 data->state = IWL_CHAIN_NOISE_ACCUMULATE;
1254                 IWL_DEBUG_CALIB("Run chain_noise_calibrate\n");
1255         }
1256         return;
1257 }
1258
1259 /*
1260  * Accumulate 20 beacons of signal and noise statistics for each of
1261  *   3 receivers/antennas/rx-chains, then figure out:
1262  * 1)  Which antennas are connected.
1263  * 2)  Differential rx gain settings to balance the 3 receivers.
1264  */
1265 static void iwl4965_noise_calibration(struct iwl4965_priv *priv,
1266                                       struct iwl4965_notif_statistics *stat_resp)
1267 {
1268         struct iwl4965_chain_noise_data *data = NULL;
1269         int rc = 0;
1270
1271         u32 chain_noise_a;
1272         u32 chain_noise_b;
1273         u32 chain_noise_c;
1274         u32 chain_sig_a;
1275         u32 chain_sig_b;
1276         u32 chain_sig_c;
1277         u32 average_sig[NUM_RX_CHAINS] = {INITIALIZATION_VALUE};
1278         u32 average_noise[NUM_RX_CHAINS] = {INITIALIZATION_VALUE};
1279         u32 max_average_sig;
1280         u16 max_average_sig_antenna_i;
1281         u32 min_average_noise = MIN_AVERAGE_NOISE_MAX_VALUE;
1282         u16 min_average_noise_antenna_i = INITIALIZATION_VALUE;
1283         u16 i = 0;
1284         u16 chan_num = INITIALIZATION_VALUE;
1285         u32 band = INITIALIZATION_VALUE;
1286         u32 active_chains = 0;
1287         unsigned long flags;
1288         struct statistics_rx_non_phy *rx_info = &(stat_resp->rx.general);
1289
1290         data = &(priv->chain_noise_data);
1291
1292         /* Accumulate just the first 20 beacons after the first association,
1293          *   then we're done forever. */
1294         if (data->state != IWL_CHAIN_NOISE_ACCUMULATE) {
1295                 if (data->state == IWL_CHAIN_NOISE_ALIVE)
1296                         IWL_DEBUG_CALIB("Wait for noise calib reset\n");
1297                 return;
1298         }
1299
1300         spin_lock_irqsave(&priv->lock, flags);
1301         if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) {
1302                 IWL_DEBUG_CALIB(" << Interference data unavailable\n");
1303                 spin_unlock_irqrestore(&priv->lock, flags);
1304                 return;
1305         }
1306
1307         band = (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) ? 0 : 1;
1308         chan_num = le16_to_cpu(priv->staging_rxon.channel);
1309
1310         /* Make sure we accumulate data for just the associated channel
1311          *   (even if scanning). */
1312         if ((chan_num != (le32_to_cpu(stat_resp->flag) >> 16)) ||
1313             ((STATISTICS_REPLY_FLG_BAND_24G_MSK ==
1314              (stat_resp->flag & STATISTICS_REPLY_FLG_BAND_24G_MSK)) && band)) {
1315                 IWL_DEBUG_CALIB("Stats not from chan=%d, band=%d\n",
1316                                 chan_num, band);
1317                 spin_unlock_irqrestore(&priv->lock, flags);
1318                 return;
1319         }
1320
1321         /* Accumulate beacon statistics values across 20 beacons */
1322         chain_noise_a = le32_to_cpu(rx_info->beacon_silence_rssi_a) &
1323                                 IN_BAND_FILTER;
1324         chain_noise_b = le32_to_cpu(rx_info->beacon_silence_rssi_b) &
1325                                 IN_BAND_FILTER;
1326         chain_noise_c = le32_to_cpu(rx_info->beacon_silence_rssi_c) &
1327                                 IN_BAND_FILTER;
1328
1329         chain_sig_a = le32_to_cpu(rx_info->beacon_rssi_a) & IN_BAND_FILTER;
1330         chain_sig_b = le32_to_cpu(rx_info->beacon_rssi_b) & IN_BAND_FILTER;
1331         chain_sig_c = le32_to_cpu(rx_info->beacon_rssi_c) & IN_BAND_FILTER;
1332
1333         spin_unlock_irqrestore(&priv->lock, flags);
1334
1335         data->beacon_count++;
1336
1337         data->chain_noise_a = (chain_noise_a + data->chain_noise_a);
1338         data->chain_noise_b = (chain_noise_b + data->chain_noise_b);
1339         data->chain_noise_c = (chain_noise_c + data->chain_noise_c);
1340
1341         data->chain_signal_a = (chain_sig_a + data->chain_signal_a);
1342         data->chain_signal_b = (chain_sig_b + data->chain_signal_b);
1343         data->chain_signal_c = (chain_sig_c + data->chain_signal_c);
1344
1345         IWL_DEBUG_CALIB("chan=%d, band=%d, beacon=%d\n", chan_num, band,
1346                         data->beacon_count);
1347         IWL_DEBUG_CALIB("chain_sig: a %d b %d c %d\n",
1348                         chain_sig_a, chain_sig_b, chain_sig_c);
1349         IWL_DEBUG_CALIB("chain_noise: a %d b %d c %d\n",
1350                         chain_noise_a, chain_noise_b, chain_noise_c);
1351
1352         /* If this is the 20th beacon, determine:
1353          * 1)  Disconnected antennas (using signal strengths)
1354          * 2)  Differential gain (using silence noise) to balance receivers */
1355         if (data->beacon_count == CAL_NUM_OF_BEACONS) {
1356
1357                 /* Analyze signal for disconnected antenna */
1358                 average_sig[0] = (data->chain_signal_a) / CAL_NUM_OF_BEACONS;
1359                 average_sig[1] = (data->chain_signal_b) / CAL_NUM_OF_BEACONS;
1360                 average_sig[2] = (data->chain_signal_c) / CAL_NUM_OF_BEACONS;
1361
1362                 if (average_sig[0] >= average_sig[1]) {
1363                         max_average_sig = average_sig[0];
1364                         max_average_sig_antenna_i = 0;
1365                         active_chains = (1 << max_average_sig_antenna_i);
1366                 } else {
1367                         max_average_sig = average_sig[1];
1368                         max_average_sig_antenna_i = 1;
1369                         active_chains = (1 << max_average_sig_antenna_i);
1370                 }
1371
1372                 if (average_sig[2] >= max_average_sig) {
1373                         max_average_sig = average_sig[2];
1374                         max_average_sig_antenna_i = 2;
1375                         active_chains = (1 << max_average_sig_antenna_i);
1376                 }
1377
1378                 IWL_DEBUG_CALIB("average_sig: a %d b %d c %d\n",
1379                              average_sig[0], average_sig[1], average_sig[2]);
1380                 IWL_DEBUG_CALIB("max_average_sig = %d, antenna %d\n",
1381                              max_average_sig, max_average_sig_antenna_i);
1382
1383                 /* Compare signal strengths for all 3 receivers. */
1384                 for (i = 0; i < NUM_RX_CHAINS; i++) {
1385                         if (i != max_average_sig_antenna_i) {
1386                                 s32 rssi_delta = (max_average_sig -
1387                                                   average_sig[i]);
1388
1389                                 /* If signal is very weak, compared with
1390                                  * strongest, mark it as disconnected. */
1391                                 if (rssi_delta > MAXIMUM_ALLOWED_PATHLOSS)
1392                                         data->disconn_array[i] = 1;
1393                                 else
1394                                         active_chains |= (1 << i);
1395                         IWL_DEBUG_CALIB("i = %d  rssiDelta = %d  "
1396                                      "disconn_array[i] = %d\n",
1397                                      i, rssi_delta, data->disconn_array[i]);
1398                         }
1399                 }
1400
1401                 /*If both chains A & B are disconnected -
1402                  * connect B and leave A as is */
1403                 if (data->disconn_array[CHAIN_A] &&
1404                     data->disconn_array[CHAIN_B]) {
1405                         data->disconn_array[CHAIN_B] = 0;
1406                         active_chains |= (1 << CHAIN_B);
1407                         IWL_DEBUG_CALIB("both A & B chains are disconnected! "
1408                                      "W/A - declare B as connected\n");
1409                 }
1410
1411                 IWL_DEBUG_CALIB("active_chains (bitwise) = 0x%x\n",
1412                                 active_chains);
1413
1414                 /* Save for use within RXON, TX, SCAN commands, etc. */
1415                 priv->valid_antenna = active_chains;
1416
1417                 /* Analyze noise for rx balance */
1418                 average_noise[0] = ((data->chain_noise_a)/CAL_NUM_OF_BEACONS);
1419                 average_noise[1] = ((data->chain_noise_b)/CAL_NUM_OF_BEACONS);
1420                 average_noise[2] = ((data->chain_noise_c)/CAL_NUM_OF_BEACONS);
1421
1422                 for (i = 0; i < NUM_RX_CHAINS; i++) {
1423                         if (!(data->disconn_array[i]) &&
1424                            (average_noise[i] <= min_average_noise)) {
1425                                 /* This means that chain i is active and has
1426                                  * lower noise values so far: */
1427                                 min_average_noise = average_noise[i];
1428                                 min_average_noise_antenna_i = i;
1429                         }
1430                 }
1431
1432                 data->delta_gain_code[min_average_noise_antenna_i] = 0;
1433
1434                 IWL_DEBUG_CALIB("average_noise: a %d b %d c %d\n",
1435                                 average_noise[0], average_noise[1],
1436                                 average_noise[2]);
1437
1438                 IWL_DEBUG_CALIB("min_average_noise = %d, antenna %d\n",
1439                                 min_average_noise, min_average_noise_antenna_i);
1440
1441                 for (i = 0; i < NUM_RX_CHAINS; i++) {
1442                         s32 delta_g = 0;
1443
1444                         if (!(data->disconn_array[i]) &&
1445                             (data->delta_gain_code[i] ==
1446                              CHAIN_NOISE_DELTA_GAIN_INIT_VAL)) {
1447                                 delta_g = average_noise[i] - min_average_noise;
1448                                 data->delta_gain_code[i] = (u8)((delta_g *
1449                                                                     10) / 15);
1450                                 if (CHAIN_NOISE_MAX_DELTA_GAIN_CODE <
1451                                    data->delta_gain_code[i])
1452                                         data->delta_gain_code[i] =
1453                                           CHAIN_NOISE_MAX_DELTA_GAIN_CODE;
1454
1455                                 data->delta_gain_code[i] =
1456                                         (data->delta_gain_code[i] | (1 << 2));
1457                         } else
1458                                 data->delta_gain_code[i] = 0;
1459                 }
1460                 IWL_DEBUG_CALIB("delta_gain_codes: a %d b %d c %d\n",
1461                              data->delta_gain_code[0],
1462                              data->delta_gain_code[1],
1463                              data->delta_gain_code[2]);
1464
1465                 /* Differential gain gets sent to uCode only once */
1466                 if (!data->radio_write) {
1467                         struct iwl4965_calibration_cmd cmd;
1468                         data->radio_write = 1;
1469
1470                         memset(&cmd, 0, sizeof(cmd));
1471                         cmd.opCode = PHY_CALIBRATE_DIFF_GAIN_CMD;
1472                         cmd.diff_gain_a = data->delta_gain_code[0];
1473                         cmd.diff_gain_b = data->delta_gain_code[1];
1474                         cmd.diff_gain_c = data->delta_gain_code[2];
1475                         rc = iwl4965_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
1476                                               sizeof(cmd), &cmd);
1477                         if (rc)
1478                                 IWL_DEBUG_CALIB("fail sending cmd "
1479                                              "REPLY_PHY_CALIBRATION_CMD \n");
1480
1481                         /* TODO we might want recalculate
1482                          * rx_chain in rxon cmd */
1483
1484                         /* Mark so we run this algo only once! */
1485                         data->state = IWL_CHAIN_NOISE_CALIBRATED;
1486                 }
1487                 data->chain_noise_a = 0;
1488                 data->chain_noise_b = 0;
1489                 data->chain_noise_c = 0;
1490                 data->chain_signal_a = 0;
1491                 data->chain_signal_b = 0;
1492                 data->chain_signal_c = 0;
1493                 data->beacon_count = 0;
1494         }
1495         return;
1496 }
1497
1498 static void iwl4965_sensitivity_calibration(struct iwl4965_priv *priv,
1499                                             struct iwl4965_notif_statistics *resp)
1500 {
1501         int rc = 0;
1502         u32 rx_enable_time;
1503         u32 fa_cck;
1504         u32 fa_ofdm;
1505         u32 bad_plcp_cck;
1506         u32 bad_plcp_ofdm;
1507         u32 norm_fa_ofdm;
1508         u32 norm_fa_cck;
1509         struct iwl4965_sensitivity_data *data = NULL;
1510         struct statistics_rx_non_phy *rx_info = &(resp->rx.general);
1511         struct statistics_rx *statistics = &(resp->rx);
1512         unsigned long flags;
1513         struct statistics_general_data statis;
1514
1515         data = &(priv->sensitivity_data);
1516
1517         if (!iwl4965_is_associated(priv)) {
1518                 IWL_DEBUG_CALIB("<< - not associated\n");
1519                 return;
1520         }
1521
1522         spin_lock_irqsave(&priv->lock, flags);
1523         if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) {
1524                 IWL_DEBUG_CALIB("<< invalid data.\n");
1525                 spin_unlock_irqrestore(&priv->lock, flags);
1526                 return;
1527         }
1528
1529         /* Extract Statistics: */
1530         rx_enable_time = le32_to_cpu(rx_info->channel_load);
1531         fa_cck = le32_to_cpu(statistics->cck.false_alarm_cnt);
1532         fa_ofdm = le32_to_cpu(statistics->ofdm.false_alarm_cnt);
1533         bad_plcp_cck = le32_to_cpu(statistics->cck.plcp_err);
1534         bad_plcp_ofdm = le32_to_cpu(statistics->ofdm.plcp_err);
1535
1536         statis.beacon_silence_rssi_a =
1537                         le32_to_cpu(statistics->general.beacon_silence_rssi_a);
1538         statis.beacon_silence_rssi_b =
1539                         le32_to_cpu(statistics->general.beacon_silence_rssi_b);
1540         statis.beacon_silence_rssi_c =
1541                         le32_to_cpu(statistics->general.beacon_silence_rssi_c);
1542         statis.beacon_energy_a =
1543                         le32_to_cpu(statistics->general.beacon_energy_a);
1544         statis.beacon_energy_b =
1545                         le32_to_cpu(statistics->general.beacon_energy_b);
1546         statis.beacon_energy_c =
1547                         le32_to_cpu(statistics->general.beacon_energy_c);
1548
1549         spin_unlock_irqrestore(&priv->lock, flags);
1550
1551         IWL_DEBUG_CALIB("rx_enable_time = %u usecs\n", rx_enable_time);
1552
1553         if (!rx_enable_time) {
1554                 IWL_DEBUG_CALIB("<< RX Enable Time == 0! \n");
1555                 return;
1556         }
1557
1558         /* These statistics increase monotonically, and do not reset
1559          *   at each beacon.  Calculate difference from last value, or just
1560          *   use the new statistics value if it has reset or wrapped around. */
1561         if (data->last_bad_plcp_cnt_cck > bad_plcp_cck)
1562                 data->last_bad_plcp_cnt_cck = bad_plcp_cck;
1563         else {
1564                 bad_plcp_cck -= data->last_bad_plcp_cnt_cck;
1565                 data->last_bad_plcp_cnt_cck += bad_plcp_cck;
1566         }
1567
1568         if (data->last_bad_plcp_cnt_ofdm > bad_plcp_ofdm)
1569                 data->last_bad_plcp_cnt_ofdm = bad_plcp_ofdm;
1570         else {
1571                 bad_plcp_ofdm -= data->last_bad_plcp_cnt_ofdm;
1572                 data->last_bad_plcp_cnt_ofdm += bad_plcp_ofdm;
1573         }
1574
1575         if (data->last_fa_cnt_ofdm > fa_ofdm)
1576                 data->last_fa_cnt_ofdm = fa_ofdm;
1577         else {
1578                 fa_ofdm -= data->last_fa_cnt_ofdm;
1579                 data->last_fa_cnt_ofdm += fa_ofdm;
1580         }
1581
1582         if (data->last_fa_cnt_cck > fa_cck)
1583                 data->last_fa_cnt_cck = fa_cck;
1584         else {
1585                 fa_cck -= data->last_fa_cnt_cck;
1586                 data->last_fa_cnt_cck += fa_cck;
1587         }
1588
1589         /* Total aborted signal locks */
1590         norm_fa_ofdm = fa_ofdm + bad_plcp_ofdm;
1591         norm_fa_cck = fa_cck + bad_plcp_cck;
1592
1593         IWL_DEBUG_CALIB("cck: fa %u badp %u  ofdm: fa %u badp %u\n", fa_cck,
1594                         bad_plcp_cck, fa_ofdm, bad_plcp_ofdm);
1595
1596         iwl4965_sens_auto_corr_ofdm(priv, norm_fa_ofdm, rx_enable_time);
1597         iwl4965_sens_energy_cck(priv, norm_fa_cck, rx_enable_time, &statis);
1598         rc |= iwl4965_sensitivity_write(priv, CMD_ASYNC);
1599
1600         return;
1601 }
1602
1603 static void iwl4965_bg_sensitivity_work(struct work_struct *work)
1604 {
1605         struct iwl4965_priv *priv = container_of(work, struct iwl4965_priv,
1606                         sensitivity_work);
1607
1608         mutex_lock(&priv->mutex);
1609
1610         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
1611             test_bit(STATUS_SCANNING, &priv->status)) {
1612                 mutex_unlock(&priv->mutex);
1613                 return;
1614         }
1615
1616         if (priv->start_calib) {
1617                 iwl4965_noise_calibration(priv, &priv->statistics);
1618
1619                 if (priv->sensitivity_data.state ==
1620                                         IWL_SENS_CALIB_NEED_REINIT) {
1621                         iwl4965_init_sensitivity(priv, CMD_ASYNC, 0);
1622                         priv->sensitivity_data.state = IWL_SENS_CALIB_ALLOWED;
1623                 } else
1624                         iwl4965_sensitivity_calibration(priv,
1625                                         &priv->statistics);
1626         }
1627
1628         mutex_unlock(&priv->mutex);
1629         return;
1630 }
1631 #endif /*CONFIG_IWL4965_SENSITIVITY*/
1632
1633 static void iwl4965_bg_txpower_work(struct work_struct *work)
1634 {
1635         struct iwl4965_priv *priv = container_of(work, struct iwl4965_priv,
1636                         txpower_work);
1637
1638         /* If a scan happened to start before we got here
1639          * then just return; the statistics notification will
1640          * kick off another scheduled work to compensate for
1641          * any temperature delta we missed here. */
1642         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
1643             test_bit(STATUS_SCANNING, &priv->status))
1644                 return;
1645
1646         mutex_lock(&priv->mutex);
1647
1648         /* Regardless of if we are assocaited, we must reconfigure the
1649          * TX power since frames can be sent on non-radar channels while
1650          * not associated */
1651         iwl4965_hw_reg_send_txpower(priv);
1652
1653         /* Update last_temperature to keep is_calib_needed from running
1654          * when it isn't needed... */
1655         priv->last_temperature = priv->temperature;
1656
1657         mutex_unlock(&priv->mutex);
1658 }
1659
1660 /*
1661  * Acquire priv->lock before calling this function !
1662  */
1663 static void iwl4965_set_wr_ptrs(struct iwl4965_priv *priv, int txq_id, u32 index)
1664 {
1665         iwl4965_write_direct32(priv, HBUS_TARG_WRPTR,
1666                              (index & 0xff) | (txq_id << 8));
1667         iwl4965_write_prph(priv, KDR_SCD_QUEUE_RDPTR(txq_id), index);
1668 }
1669
1670 /**
1671  * iwl4965_tx_queue_set_status - (optionally) start Tx/Cmd queue
1672  * @tx_fifo_id: Tx DMA/FIFO channel (range 0-7) that the queue will feed
1673  * @scd_retry: (1) Indicates queue will be used in aggregation mode
1674  *
1675  * NOTE:  Acquire priv->lock before calling this function !
1676  */
1677 static void iwl4965_tx_queue_set_status(struct iwl4965_priv *priv,
1678                                         struct iwl4965_tx_queue *txq,
1679                                         int tx_fifo_id, int scd_retry)
1680 {
1681         int txq_id = txq->q.id;
1682
1683         /* Find out whether to activate Tx queue */
1684         int active = test_bit(txq_id, &priv->txq_ctx_active_msk)?1:0;
1685
1686         /* Set up and activate */
1687         iwl4965_write_prph(priv, KDR_SCD_QUEUE_STATUS_BITS(txq_id),
1688                                  (active << SCD_QUEUE_STTS_REG_POS_ACTIVE) |
1689                                  (tx_fifo_id << SCD_QUEUE_STTS_REG_POS_TXF) |
1690                                  (scd_retry << SCD_QUEUE_STTS_REG_POS_WSL) |
1691                                  (scd_retry << SCD_QUEUE_STTS_REG_POS_SCD_ACK) |
1692                                  SCD_QUEUE_STTS_REG_MSK);
1693
1694         txq->sched_retry = scd_retry;
1695
1696         IWL_DEBUG_INFO("%s %s Queue %d on AC %d\n",
1697                        active ? "Activate" : "Deactivate",
1698                        scd_retry ? "BA" : "AC", txq_id, tx_fifo_id);
1699 }
1700
1701 static const u16 default_queue_to_tx_fifo[] = {
1702         IWL_TX_FIFO_AC3,
1703         IWL_TX_FIFO_AC2,
1704         IWL_TX_FIFO_AC1,
1705         IWL_TX_FIFO_AC0,
1706         IWL_CMD_FIFO_NUM,
1707         IWL_TX_FIFO_HCCA_1,
1708         IWL_TX_FIFO_HCCA_2
1709 };
1710
1711 static inline void iwl4965_txq_ctx_activate(struct iwl4965_priv *priv, int txq_id)
1712 {
1713         set_bit(txq_id, &priv->txq_ctx_active_msk);
1714 }
1715
1716 static inline void iwl4965_txq_ctx_deactivate(struct iwl4965_priv *priv, int txq_id)
1717 {
1718         clear_bit(txq_id, &priv->txq_ctx_active_msk);
1719 }
1720
1721 int iwl4965_alive_notify(struct iwl4965_priv *priv)
1722 {
1723         u32 a;
1724         int i = 0;
1725         unsigned long flags;
1726         int rc;
1727
1728         spin_lock_irqsave(&priv->lock, flags);
1729
1730 #ifdef CONFIG_IWL4965_SENSITIVITY
1731         memset(&(priv->sensitivity_data), 0,
1732                sizeof(struct iwl4965_sensitivity_data));
1733         memset(&(priv->chain_noise_data), 0,
1734                sizeof(struct iwl4965_chain_noise_data));
1735         for (i = 0; i < NUM_RX_CHAINS; i++)
1736                 priv->chain_noise_data.delta_gain_code[i] =
1737                                 CHAIN_NOISE_DELTA_GAIN_INIT_VAL;
1738 #endif /* CONFIG_IWL4965_SENSITIVITY*/
1739         rc = iwl4965_grab_nic_access(priv);
1740         if (rc) {
1741                 spin_unlock_irqrestore(&priv->lock, flags);
1742                 return rc;
1743         }
1744
1745         /* Clear 4965's internal Tx Scheduler data base */
1746         priv->scd_base_addr = iwl4965_read_prph(priv, KDR_SCD_SRAM_BASE_ADDR);
1747         a = priv->scd_base_addr + SCD_CONTEXT_DATA_OFFSET;
1748         for (; a < priv->scd_base_addr + SCD_TX_STTS_BITMAP_OFFSET; a += 4)
1749                 iwl4965_write_targ_mem(priv, a, 0);
1750         for (; a < priv->scd_base_addr + SCD_TRANSLATE_TBL_OFFSET; a += 4)
1751                 iwl4965_write_targ_mem(priv, a, 0);
1752         for (; a < sizeof(u16) * priv->hw_setting.max_txq_num; a += 4)
1753                 iwl4965_write_targ_mem(priv, a, 0);
1754
1755         /* Tel 4965 where to find Tx byte count tables */
1756         iwl4965_write_prph(priv, KDR_SCD_DRAM_BASE_ADDR,
1757                 (priv->hw_setting.shared_phys +
1758                  offsetof(struct iwl4965_shared, queues_byte_cnt_tbls)) >> 10);
1759
1760         /* Disable chain mode for all queues */
1761         iwl4965_write_prph(priv, KDR_SCD_QUEUECHAIN_SEL, 0);
1762
1763         /* Initialize each Tx queue (including the command queue) */
1764         for (i = 0; i < priv->hw_setting.max_txq_num; i++) {
1765
1766                 /* TFD circular buffer read/write indexes */
1767                 iwl4965_write_prph(priv, KDR_SCD_QUEUE_RDPTR(i), 0);
1768                 iwl4965_write_direct32(priv, HBUS_TARG_WRPTR, 0 | (i << 8));
1769
1770                 /* Max Tx Window size for Scheduler-ACK mode */
1771                 iwl4965_write_targ_mem(priv, priv->scd_base_addr +
1772                                         SCD_CONTEXT_QUEUE_OFFSET(i),
1773                                         (SCD_WIN_SIZE <<
1774                                         SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
1775                                         SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
1776
1777                 /* Frame limit */
1778                 iwl4965_write_targ_mem(priv, priv->scd_base_addr +
1779                                         SCD_CONTEXT_QUEUE_OFFSET(i) +
1780                                         sizeof(u32),
1781                                         (SCD_FRAME_LIMIT <<
1782                                         SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) &
1783                                         SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
1784
1785         }
1786         iwl4965_write_prph(priv, KDR_SCD_INTERRUPT_MASK,
1787                                  (1 << priv->hw_setting.max_txq_num) - 1);
1788
1789         /* Activate all Tx DMA/FIFO channels */
1790         iwl4965_write_prph(priv, KDR_SCD_TXFACT,
1791                                  SCD_TXFACT_REG_TXFIFO_MASK(0, 7));
1792
1793         iwl4965_set_wr_ptrs(priv, IWL_CMD_QUEUE_NUM, 0);
1794
1795         /* Map each Tx/cmd queue to its corresponding fifo */
1796         for (i = 0; i < ARRAY_SIZE(default_queue_to_tx_fifo); i++) {
1797                 int ac = default_queue_to_tx_fifo[i];
1798                 iwl4965_txq_ctx_activate(priv, i);
1799                 iwl4965_tx_queue_set_status(priv, &priv->txq[i], ac, 0);
1800         }
1801
1802         iwl4965_release_nic_access(priv);
1803         spin_unlock_irqrestore(&priv->lock, flags);
1804
1805         return 0;
1806 }
1807
1808 /**
1809  * iwl4965_hw_set_hw_setting
1810  *
1811  * Called when initializing driver
1812  */
1813 int iwl4965_hw_set_hw_setting(struct iwl4965_priv *priv)
1814 {
1815         /* Allocate area for Tx byte count tables and Rx queue status */
1816         priv->hw_setting.shared_virt =
1817             pci_alloc_consistent(priv->pci_dev,
1818                                  sizeof(struct iwl4965_shared),
1819                                  &priv->hw_setting.shared_phys);
1820
1821         if (!priv->hw_setting.shared_virt)
1822                 return -1;
1823
1824         memset(priv->hw_setting.shared_virt, 0, sizeof(struct iwl4965_shared));
1825
1826         priv->hw_setting.max_txq_num = iwl4965_param_queues_num;
1827         priv->hw_setting.tx_cmd_len = sizeof(struct iwl4965_tx_cmd);
1828         priv->hw_setting.max_rxq_size = RX_QUEUE_SIZE;
1829         priv->hw_setting.max_rxq_log = RX_QUEUE_SIZE_LOG;
1830         if (iwl4965_param_amsdu_size_8K)
1831                 priv->hw_setting.rx_buf_size = IWL_RX_BUF_SIZE_8K;
1832         else
1833                 priv->hw_setting.rx_buf_size = IWL_RX_BUF_SIZE_4K;
1834         priv->hw_setting.max_pkt_size = priv->hw_setting.rx_buf_size - 256;
1835         priv->hw_setting.max_stations = IWL4965_STATION_COUNT;
1836         priv->hw_setting.bcast_sta_id = IWL4965_BROADCAST_ID;
1837
1838         priv->hw_setting.tx_ant_num = 2;
1839
1840         return 0;
1841 }
1842
1843 /**
1844  * iwl4965_hw_txq_ctx_free - Free TXQ Context
1845  *
1846  * Destroy all TX DMA queues and structures
1847  */
1848 void iwl4965_hw_txq_ctx_free(struct iwl4965_priv *priv)
1849 {
1850         int txq_id;
1851
1852         /* Tx queues */
1853         for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++)
1854                 iwl4965_tx_queue_free(priv, &priv->txq[txq_id]);
1855
1856         /* Keep-warm buffer */
1857         iwl4965_kw_free(priv);
1858 }
1859
1860 /**
1861  * iwl4965_hw_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr]
1862  *
1863  * Does NOT advance any TFD circular buffer read/write indexes
1864  * Does NOT free the TFD itself (which is within circular buffer)
1865  */
1866 int iwl4965_hw_txq_free_tfd(struct iwl4965_priv *priv, struct iwl4965_tx_queue *txq)
1867 {
1868         struct iwl4965_tfd_frame *bd_tmp = (struct iwl4965_tfd_frame *)&txq->bd[0];
1869         struct iwl4965_tfd_frame *bd = &bd_tmp[txq->q.read_ptr];
1870         struct pci_dev *dev = priv->pci_dev;
1871         int i;
1872         int counter = 0;
1873         int index, is_odd;
1874
1875         /* Host command buffers stay mapped in memory, nothing to clean */
1876         if (txq->q.id == IWL_CMD_QUEUE_NUM)
1877                 return 0;
1878
1879         /* Sanity check on number of chunks */
1880         counter = IWL_GET_BITS(*bd, num_tbs);
1881         if (counter > MAX_NUM_OF_TBS) {
1882                 IWL_ERROR("Too many chunks: %i\n", counter);
1883                 /* @todo issue fatal error, it is quite serious situation */
1884                 return 0;
1885         }
1886
1887         /* Unmap chunks, if any.
1888          * TFD info for odd chunks is different format than for even chunks. */
1889         for (i = 0; i < counter; i++) {
1890                 index = i / 2;
1891                 is_odd = i & 0x1;
1892
1893                 if (is_odd)
1894                         pci_unmap_single(
1895                                 dev,
1896                                 IWL_GET_BITS(bd->pa[index], tb2_addr_lo16) |
1897                                 (IWL_GET_BITS(bd->pa[index],
1898                                               tb2_addr_hi20) << 16),
1899                                 IWL_GET_BITS(bd->pa[index], tb2_len),
1900                                 PCI_DMA_TODEVICE);
1901
1902                 else if (i > 0)
1903                         pci_unmap_single(dev,
1904                                          le32_to_cpu(bd->pa[index].tb1_addr),
1905                                          IWL_GET_BITS(bd->pa[index], tb1_len),
1906                                          PCI_DMA_TODEVICE);
1907
1908                 /* Free SKB, if any, for this chunk */
1909                 if (txq->txb[txq->q.read_ptr].skb[i]) {
1910                         struct sk_buff *skb = txq->txb[txq->q.read_ptr].skb[i];
1911
1912                         dev_kfree_skb(skb);
1913                         txq->txb[txq->q.read_ptr].skb[i] = NULL;
1914                 }
1915         }
1916         return 0;
1917 }
1918
1919 int iwl4965_hw_reg_set_txpower(struct iwl4965_priv *priv, s8 power)
1920 {
1921         IWL_ERROR("TODO: Implement iwl4965_hw_reg_set_txpower!\n");
1922         return -EINVAL;
1923 }
1924
1925 static s32 iwl4965_math_div_round(s32 num, s32 denom, s32 *res)
1926 {
1927         s32 sign = 1;
1928
1929         if (num < 0) {
1930                 sign = -sign;
1931                 num = -num;
1932         }
1933         if (denom < 0) {
1934                 sign = -sign;
1935                 denom = -denom;
1936         }
1937         *res = 1;
1938         *res = ((num * 2 + denom) / (denom * 2)) * sign;
1939
1940         return 1;
1941 }
1942
1943 /**
1944  * iwl4965_get_voltage_compensation - Power supply voltage comp for txpower
1945  *
1946  * Determines power supply voltage compensation for txpower calculations.
1947  * Returns number of 1/2-dB steps to subtract from gain table index,
1948  * to compensate for difference between power supply voltage during
1949  * factory measurements, vs. current power supply voltage.
1950  *
1951  * Voltage indication is higher for lower voltage.
1952  * Lower voltage requires more gain (lower gain table index).
1953  */
1954 static s32 iwl4965_get_voltage_compensation(s32 eeprom_voltage,
1955                                             s32 current_voltage)
1956 {
1957         s32 comp = 0;
1958
1959         if ((TX_POWER_IWL_ILLEGAL_VOLTAGE == eeprom_voltage) ||
1960             (TX_POWER_IWL_ILLEGAL_VOLTAGE == current_voltage))
1961                 return 0;
1962
1963         iwl4965_math_div_round(current_voltage - eeprom_voltage,
1964                                TX_POWER_IWL_VOLTAGE_CODES_PER_03V, &comp);
1965
1966         if (current_voltage > eeprom_voltage)
1967                 comp *= 2;
1968         if ((comp < -2) || (comp > 2))
1969                 comp = 0;
1970
1971         return comp;
1972 }
1973
1974 static const struct iwl4965_channel_info *
1975 iwl4965_get_channel_txpower_info(struct iwl4965_priv *priv,
1976                                  enum ieee80211_band band, u16 channel)
1977 {
1978         const struct iwl4965_channel_info *ch_info;
1979
1980         ch_info = iwl4965_get_channel_info(priv, band, channel);
1981
1982         if (!is_channel_valid(ch_info))
1983                 return NULL;
1984
1985         return ch_info;
1986 }
1987
1988 static s32 iwl4965_get_tx_atten_grp(u16 channel)
1989 {
1990         if (channel >= CALIB_IWL_TX_ATTEN_GR5_FCH &&
1991             channel <= CALIB_IWL_TX_ATTEN_GR5_LCH)
1992                 return CALIB_CH_GROUP_5;
1993
1994         if (channel >= CALIB_IWL_TX_ATTEN_GR1_FCH &&
1995             channel <= CALIB_IWL_TX_ATTEN_GR1_LCH)
1996                 return CALIB_CH_GROUP_1;
1997
1998         if (channel >= CALIB_IWL_TX_ATTEN_GR2_FCH &&
1999             channel <= CALIB_IWL_TX_ATTEN_GR2_LCH)
2000                 return CALIB_CH_GROUP_2;
2001
2002         if (channel >= CALIB_IWL_TX_ATTEN_GR3_FCH &&
2003             channel <= CALIB_IWL_TX_ATTEN_GR3_LCH)
2004                 return CALIB_CH_GROUP_3;
2005
2006         if (channel >= CALIB_IWL_TX_ATTEN_GR4_FCH &&
2007             channel <= CALIB_IWL_TX_ATTEN_GR4_LCH)
2008                 return CALIB_CH_GROUP_4;
2009
2010         IWL_ERROR("Can't find txatten group for channel %d.\n", channel);
2011         return -1;
2012 }
2013
2014 static u32 iwl4965_get_sub_band(const struct iwl4965_priv *priv, u32 channel)
2015 {
2016         s32 b = -1;
2017
2018         for (b = 0; b < EEPROM_TX_POWER_BANDS; b++) {
2019                 if (priv->eeprom.calib_info.band_info[b].ch_from == 0)
2020                         continue;
2021
2022                 if ((channel >= priv->eeprom.calib_info.band_info[b].ch_from)
2023                     && (channel <= priv->eeprom.calib_info.band_info[b].ch_to))
2024                         break;
2025         }
2026
2027         return b;
2028 }
2029
2030 static s32 iwl4965_interpolate_value(s32 x, s32 x1, s32 y1, s32 x2, s32 y2)
2031 {
2032         s32 val;
2033
2034         if (x2 == x1)
2035                 return y1;
2036         else {
2037                 iwl4965_math_div_round((x2 - x) * (y1 - y2), (x2 - x1), &val);
2038                 return val + y2;
2039         }
2040 }
2041
2042 /**
2043  * iwl4965_interpolate_chan - Interpolate factory measurements for one channel
2044  *
2045  * Interpolates factory measurements from the two sample channels within a
2046  * sub-band, to apply to channel of interest.  Interpolation is proportional to
2047  * differences in channel frequencies, which is proportional to differences
2048  * in channel number.
2049  */
2050 static int iwl4965_interpolate_chan(struct iwl4965_priv *priv, u32 channel,
2051                                     struct iwl4965_eeprom_calib_ch_info *chan_info)
2052 {
2053         s32 s = -1;
2054         u32 c;
2055         u32 m;
2056         const struct iwl4965_eeprom_calib_measure *m1;
2057         const struct iwl4965_eeprom_calib_measure *m2;
2058         struct iwl4965_eeprom_calib_measure *omeas;
2059         u32 ch_i1;
2060         u32 ch_i2;
2061
2062         s = iwl4965_get_sub_band(priv, channel);
2063         if (s >= EEPROM_TX_POWER_BANDS) {
2064                 IWL_ERROR("Tx Power can not find channel %d ", channel);
2065                 return -1;
2066         }
2067
2068         ch_i1 = priv->eeprom.calib_info.band_info[s].ch1.ch_num;
2069         ch_i2 = priv->eeprom.calib_info.band_info[s].ch2.ch_num;
2070         chan_info->ch_num = (u8) channel;
2071
2072         IWL_DEBUG_TXPOWER("channel %d subband %d factory cal ch %d & %d\n",
2073                           channel, s, ch_i1, ch_i2);
2074
2075         for (c = 0; c < EEPROM_TX_POWER_TX_CHAINS; c++) {
2076                 for (m = 0; m < EEPROM_TX_POWER_MEASUREMENTS; m++) {
2077                         m1 = &(priv->eeprom.calib_info.band_info[s].ch1.
2078                                measurements[c][m]);
2079                         m2 = &(priv->eeprom.calib_info.band_info[s].ch2.
2080                                measurements[c][m]);
2081                         omeas = &(chan_info->measurements[c][m]);
2082
2083                         omeas->actual_pow =
2084                             (u8) iwl4965_interpolate_value(channel, ch_i1,
2085                                                            m1->actual_pow,
2086                                                            ch_i2,
2087                                                            m2->actual_pow);
2088                         omeas->gain_idx =
2089                             (u8) iwl4965_interpolate_value(channel, ch_i1,
2090                                                            m1->gain_idx, ch_i2,
2091                                                            m2->gain_idx);
2092                         omeas->temperature =
2093                             (u8) iwl4965_interpolate_value(channel, ch_i1,
2094                                                            m1->temperature,
2095                                                            ch_i2,
2096                                                            m2->temperature);
2097                         omeas->pa_det =
2098                             (s8) iwl4965_interpolate_value(channel, ch_i1,
2099                                                            m1->pa_det, ch_i2,
2100                                                            m2->pa_det);
2101
2102                         IWL_DEBUG_TXPOWER
2103                             ("chain %d meas %d AP1=%d AP2=%d AP=%d\n", c, m,
2104                              m1->actual_pow, m2->actual_pow, omeas->actual_pow);
2105                         IWL_DEBUG_TXPOWER
2106                             ("chain %d meas %d NI1=%d NI2=%d NI=%d\n", c, m,
2107                              m1->gain_idx, m2->gain_idx, omeas->gain_idx);
2108                         IWL_DEBUG_TXPOWER
2109                             ("chain %d meas %d PA1=%d PA2=%d PA=%d\n", c, m,
2110                              m1->pa_det, m2->pa_det, omeas->pa_det);
2111                         IWL_DEBUG_TXPOWER
2112                             ("chain %d meas %d  T1=%d  T2=%d  T=%d\n", c, m,
2113                              m1->temperature, m2->temperature,
2114                              omeas->temperature);
2115                 }
2116         }
2117
2118         return 0;
2119 }
2120
2121 /* bit-rate-dependent table to prevent Tx distortion, in half-dB units,
2122  * for OFDM 6, 12, 18, 24, 36, 48, 54, 60 MBit, and CCK all rates. */
2123 static s32 back_off_table[] = {
2124         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 20 MHz */
2125         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 20 MHz */
2126         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 40 MHz */
2127         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 40 MHz */
2128         10                      /* CCK */
2129 };
2130
2131 /* Thermal compensation values for txpower for various frequency ranges ...
2132  *   ratios from 3:1 to 4.5:1 of degrees (Celsius) per half-dB gain adjust */
2133 static struct iwl4965_txpower_comp_entry {
2134         s32 degrees_per_05db_a;
2135         s32 degrees_per_05db_a_denom;
2136 } tx_power_cmp_tble[CALIB_CH_GROUP_MAX] = {
2137         {9, 2},                 /* group 0 5.2, ch  34-43 */
2138         {4, 1},                 /* group 1 5.2, ch  44-70 */
2139         {4, 1},                 /* group 2 5.2, ch  71-124 */
2140         {4, 1},                 /* group 3 5.2, ch 125-200 */
2141         {3, 1}                  /* group 4 2.4, ch   all */
2142 };
2143
2144 static s32 get_min_power_index(s32 rate_power_index, u32 band)
2145 {
2146         if (!band) {
2147                 if ((rate_power_index & 7) <= 4)
2148                         return MIN_TX_GAIN_INDEX_52GHZ_EXT;
2149         }
2150         return MIN_TX_GAIN_INDEX;
2151 }
2152
2153 struct gain_entry {
2154         u8 dsp;
2155         u8 radio;
2156 };
2157
2158 static const struct gain_entry gain_table[2][108] = {
2159         /* 5.2GHz power gain index table */
2160         {
2161          {123, 0x3F},           /* highest txpower */
2162          {117, 0x3F},
2163          {110, 0x3F},
2164          {104, 0x3F},
2165          {98, 0x3F},
2166          {110, 0x3E},
2167          {104, 0x3E},
2168          {98, 0x3E},
2169          {110, 0x3D},
2170          {104, 0x3D},
2171          {98, 0x3D},
2172          {110, 0x3C},
2173          {104, 0x3C},
2174          {98, 0x3C},
2175          {110, 0x3B},
2176          {104, 0x3B},
2177          {98, 0x3B},
2178          {110, 0x3A},
2179          {104, 0x3A},
2180          {98, 0x3A},
2181          {110, 0x39},
2182          {104, 0x39},
2183          {98, 0x39},
2184          {110, 0x38},
2185          {104, 0x38},
2186          {98, 0x38},
2187          {110, 0x37},
2188          {104, 0x37},
2189          {98, 0x37},
2190          {110, 0x36},
2191          {104, 0x36},
2192          {98, 0x36},
2193          {110, 0x35},
2194          {104, 0x35},
2195          {98, 0x35},
2196          {110, 0x34},
2197          {104, 0x34},
2198          {98, 0x34},
2199          {110, 0x33},
2200          {104, 0x33},
2201          {98, 0x33},
2202          {110, 0x32},
2203          {104, 0x32},
2204          {98, 0x32},
2205          {110, 0x31},
2206          {104, 0x31},
2207          {98, 0x31},
2208          {110, 0x30},
2209          {104, 0x30},
2210          {98, 0x30},
2211          {110, 0x25},
2212          {104, 0x25},
2213          {98, 0x25},
2214          {110, 0x24},
2215          {104, 0x24},
2216          {98, 0x24},
2217          {110, 0x23},
2218          {104, 0x23},
2219          {98, 0x23},
2220          {110, 0x22},
2221          {104, 0x18},
2222          {98, 0x18},
2223          {110, 0x17},
2224          {104, 0x17},
2225          {98, 0x17},
2226          {110, 0x16},
2227          {104, 0x16},
2228          {98, 0x16},
2229          {110, 0x15},
2230          {104, 0x15},
2231          {98, 0x15},
2232          {110, 0x14},
2233          {104, 0x14},
2234          {98, 0x14},
2235          {110, 0x13},
2236          {104, 0x13},
2237          {98, 0x13},
2238          {110, 0x12},
2239          {104, 0x08},
2240          {98, 0x08},
2241          {110, 0x07},
2242          {104, 0x07},
2243          {98, 0x07},
2244          {110, 0x06},
2245          {104, 0x06},
2246          {98, 0x06},
2247          {110, 0x05},
2248          {104, 0x05},
2249          {98, 0x05},
2250          {110, 0x04},
2251          {104, 0x04},
2252          {98, 0x04},
2253          {110, 0x03},
2254          {104, 0x03},
2255          {98, 0x03},
2256          {110, 0x02},
2257          {104, 0x02},
2258          {98, 0x02},
2259          {110, 0x01},
2260          {104, 0x01},
2261          {98, 0x01},
2262          {110, 0x00},
2263          {104, 0x00},
2264          {98, 0x00},
2265          {93, 0x00},
2266          {88, 0x00},
2267          {83, 0x00},
2268          {78, 0x00},
2269          },
2270         /* 2.4GHz power gain index table */
2271         {
2272          {110, 0x3f},           /* highest txpower */
2273          {104, 0x3f},
2274          {98, 0x3f},
2275          {110, 0x3e},
2276          {104, 0x3e},
2277          {98, 0x3e},
2278          {110, 0x3d},
2279          {104, 0x3d},
2280          {98, 0x3d},
2281          {110, 0x3c},
2282          {104, 0x3c},
2283          {98, 0x3c},
2284          {110, 0x3b},
2285          {104, 0x3b},
2286          {98, 0x3b},
2287          {110, 0x3a},
2288          {104, 0x3a},
2289          {98, 0x3a},
2290          {110, 0x39},
2291          {104, 0x39},
2292          {98, 0x39},
2293          {110, 0x38},
2294          {104, 0x38},
2295          {98, 0x38},
2296          {110, 0x37},
2297          {104, 0x37},
2298          {98, 0x37},
2299          {110, 0x36},
2300          {104, 0x36},
2301          {98, 0x36},
2302          {110, 0x35},
2303          {104, 0x35},
2304          {98, 0x35},
2305          {110, 0x34},
2306          {104, 0x34},
2307          {98, 0x34},
2308          {110, 0x33},
2309          {104, 0x33},
2310          {98, 0x33},
2311          {110, 0x32},
2312          {104, 0x32},
2313          {98, 0x32},
2314          {110, 0x31},
2315          {104, 0x31},
2316          {98, 0x31},
2317          {110, 0x30},
2318          {104, 0x30},
2319          {98, 0x30},
2320          {110, 0x6},
2321          {104, 0x6},
2322          {98, 0x6},
2323          {110, 0x5},
2324          {104, 0x5},
2325          {98, 0x5},
2326          {110, 0x4},
2327          {104, 0x4},
2328          {98, 0x4},
2329          {110, 0x3},
2330          {104, 0x3},
2331          {98, 0x3},
2332          {110, 0x2},
2333          {104, 0x2},
2334          {98, 0x2},
2335          {110, 0x1},
2336          {104, 0x1},
2337          {98, 0x1},
2338          {110, 0x0},
2339          {104, 0x0},
2340          {98, 0x0},
2341          {97, 0},
2342          {96, 0},
2343          {95, 0},
2344          {94, 0},
2345          {93, 0},
2346          {92, 0},
2347          {91, 0},
2348          {90, 0},
2349          {89, 0},
2350          {88, 0},
2351          {87, 0},
2352          {86, 0},
2353          {85, 0},
2354          {84, 0},
2355          {83, 0},
2356          {82, 0},
2357          {81, 0},
2358          {80, 0},
2359          {79, 0},
2360          {78, 0},
2361          {77, 0},
2362          {76, 0},
2363          {75, 0},
2364          {74, 0},
2365          {73, 0},
2366          {72, 0},
2367          {71, 0},
2368          {70, 0},
2369          {69, 0},
2370          {68, 0},
2371          {67, 0},
2372          {66, 0},
2373          {65, 0},
2374          {64, 0},
2375          {63, 0},
2376          {62, 0},
2377          {61, 0},
2378          {60, 0},
2379          {59, 0},
2380          }
2381 };
2382
2383 static int iwl4965_fill_txpower_tbl(struct iwl4965_priv *priv, u8 band, u16 channel,
2384                                     u8 is_fat, u8 ctrl_chan_high,
2385                                     struct iwl4965_tx_power_db *tx_power_tbl)
2386 {
2387         u8 saturation_power;
2388         s32 target_power;
2389         s32 user_target_power;
2390         s32 power_limit;
2391         s32 current_temp;
2392         s32 reg_limit;
2393         s32 current_regulatory;
2394         s32 txatten_grp = CALIB_CH_GROUP_MAX;
2395         int i;
2396         int c;
2397         const struct iwl4965_channel_info *ch_info = NULL;
2398         struct iwl4965_eeprom_calib_ch_info ch_eeprom_info;
2399         const struct iwl4965_eeprom_calib_measure *measurement;
2400         s16 voltage;
2401         s32 init_voltage;
2402         s32 voltage_compensation;
2403         s32 degrees_per_05db_num;
2404         s32 degrees_per_05db_denom;
2405         s32 factory_temp;
2406         s32 temperature_comp[2];
2407         s32 factory_gain_index[2];
2408         s32 factory_actual_pwr[2];
2409         s32 power_index;
2410
2411         /* Sanity check requested level (dBm) */
2412         if (priv->user_txpower_limit < IWL_TX_POWER_TARGET_POWER_MIN) {
2413                 IWL_WARNING("Requested user TXPOWER %d below limit.\n",
2414                             priv->user_txpower_limit);
2415                 return -EINVAL;
2416         }
2417         if (priv->user_txpower_limit > IWL_TX_POWER_TARGET_POWER_MAX) {
2418                 IWL_WARNING("Requested user TXPOWER %d above limit.\n",
2419                             priv->user_txpower_limit);
2420                 return -EINVAL;
2421         }
2422
2423         /* user_txpower_limit is in dBm, convert to half-dBm (half-dB units
2424          *   are used for indexing into txpower table) */
2425         user_target_power = 2 * priv->user_txpower_limit;
2426
2427         /* Get current (RXON) channel, band, width */
2428         ch_info =
2429                 iwl4965_get_channel_txpower_info(priv, priv->band, channel);
2430
2431         IWL_DEBUG_TXPOWER("chan %d band %d is_fat %d\n", channel, band,
2432                           is_fat);
2433
2434         if (!ch_info)
2435                 return -EINVAL;
2436
2437         /* get txatten group, used to select 1) thermal txpower adjustment
2438          *   and 2) mimo txpower balance between Tx chains. */
2439         txatten_grp = iwl4965_get_tx_atten_grp(channel);
2440         if (txatten_grp < 0)
2441                 return -EINVAL;
2442
2443         IWL_DEBUG_TXPOWER("channel %d belongs to txatten group %d\n",
2444                           channel, txatten_grp);
2445
2446         if (is_fat) {
2447                 if (ctrl_chan_high)
2448                         channel -= 2;
2449                 else
2450                         channel += 2;
2451         }
2452
2453         /* hardware txpower limits ...
2454          * saturation (clipping distortion) txpowers are in half-dBm */
2455         if (band)
2456                 saturation_power = priv->eeprom.calib_info.saturation_power24;
2457         else
2458                 saturation_power = priv->eeprom.calib_info.saturation_power52;
2459
2460         if (saturation_power < IWL_TX_POWER_SATURATION_MIN ||
2461             saturation_power > IWL_TX_POWER_SATURATION_MAX) {
2462                 if (band)
2463                         saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_24;
2464                 else
2465                         saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_52;
2466         }
2467
2468         /* regulatory txpower limits ... reg_limit values are in half-dBm,
2469          *   max_power_avg values are in dBm, convert * 2 */
2470         if (is_fat)
2471                 reg_limit = ch_info->fat_max_power_avg * 2;
2472         else
2473                 reg_limit = ch_info->max_power_avg * 2;
2474
2475         if ((reg_limit < IWL_TX_POWER_REGULATORY_MIN) ||
2476             (reg_limit > IWL_TX_POWER_REGULATORY_MAX)) {
2477                 if (band)
2478                         reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_24;
2479                 else
2480                         reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_52;
2481         }
2482
2483         /* Interpolate txpower calibration values for this channel,
2484          *   based on factory calibration tests on spaced channels. */
2485         iwl4965_interpolate_chan(priv, channel, &ch_eeprom_info);
2486
2487         /* calculate tx gain adjustment based on power supply voltage */
2488         voltage = priv->eeprom.calib_info.voltage;
2489         init_voltage = (s32)le32_to_cpu(priv->card_alive_init.voltage);
2490         voltage_compensation =
2491             iwl4965_get_voltage_compensation(voltage, init_voltage);
2492
2493         IWL_DEBUG_TXPOWER("curr volt %d eeprom volt %d volt comp %d\n",
2494                           init_voltage,
2495                           voltage, voltage_compensation);
2496
2497         /* get current temperature (Celsius) */
2498         current_temp = max(priv->temperature, IWL_TX_POWER_TEMPERATURE_MIN);
2499         current_temp = min(priv->temperature, IWL_TX_POWER_TEMPERATURE_MAX);
2500         current_temp = KELVIN_TO_CELSIUS(current_temp);
2501
2502         /* select thermal txpower adjustment params, based on channel group
2503          *   (same frequency group used for mimo txatten adjustment) */
2504         degrees_per_05db_num =
2505             tx_power_cmp_tble[txatten_grp].degrees_per_05db_a;
2506         degrees_per_05db_denom =
2507             tx_power_cmp_tble[txatten_grp].degrees_per_05db_a_denom;
2508
2509         /* get per-chain txpower values from factory measurements */
2510         for (c = 0; c < 2; c++) {
2511                 measurement = &ch_eeprom_info.measurements[c][1];
2512
2513                 /* txgain adjustment (in half-dB steps) based on difference
2514                  *   between factory and current temperature */
2515                 factory_temp = measurement->temperature;
2516                 iwl4965_math_div_round((current_temp - factory_temp) *
2517                                        degrees_per_05db_denom,
2518                                        degrees_per_05db_num,
2519                                        &temperature_comp[c]);
2520
2521                 factory_gain_index[c] = measurement->gain_idx;
2522                 factory_actual_pwr[c] = measurement->actual_pow;
2523
2524                 IWL_DEBUG_TXPOWER("chain = %d\n", c);
2525                 IWL_DEBUG_TXPOWER("fctry tmp %d, "
2526                                   "curr tmp %d, comp %d steps\n",
2527                                   factory_temp, current_temp,
2528                                   temperature_comp[c]);
2529
2530                 IWL_DEBUG_TXPOWER("fctry idx %d, fctry pwr %d\n",
2531                                   factory_gain_index[c],
2532                                   factory_actual_pwr[c]);
2533         }
2534
2535         /* for each of 33 bit-rates (including 1 for CCK) */
2536         for (i = 0; i < POWER_TABLE_NUM_ENTRIES; i++) {
2537                 u8 is_mimo_rate;
2538                 union iwl4965_tx_power_dual_stream tx_power;
2539
2540                 /* for mimo, reduce each chain's txpower by half
2541                  * (3dB, 6 steps), so total output power is regulatory
2542                  * compliant. */
2543                 if (i & 0x8) {
2544                         current_regulatory = reg_limit -
2545                             IWL_TX_POWER_MIMO_REGULATORY_COMPENSATION;
2546                         is_mimo_rate = 1;
2547                 } else {
2548                         current_regulatory = reg_limit;
2549                         is_mimo_rate = 0;
2550                 }
2551
2552                 /* find txpower limit, either hardware or regulatory */
2553                 power_limit = saturation_power - back_off_table[i];
2554                 if (power_limit > current_regulatory)
2555                         power_limit = current_regulatory;
2556
2557                 /* reduce user's txpower request if necessary
2558                  * for this rate on this channel */
2559                 target_power = user_target_power;
2560                 if (target_power > power_limit)
2561                         target_power = power_limit;
2562
2563                 IWL_DEBUG_TXPOWER("rate %d sat %d reg %d usr %d tgt %d\n",
2564                                   i, saturation_power - back_off_table[i],
2565                                   current_regulatory, user_target_power,
2566                                   target_power);
2567
2568                 /* for each of 2 Tx chains (radio transmitters) */
2569                 for (c = 0; c < 2; c++) {
2570                         s32 atten_value;
2571
2572                         if (is_mimo_rate)
2573                                 atten_value =
2574                                     (s32)le32_to_cpu(priv->card_alive_init.
2575                                     tx_atten[txatten_grp][c]);
2576                         else
2577                                 atten_value = 0;
2578
2579                         /* calculate index; higher index means lower txpower */
2580                         power_index = (u8) (factory_gain_index[c] -
2581                                             (target_power -
2582                                              factory_actual_pwr[c]) -
2583                                             temperature_comp[c] -
2584                                             voltage_compensation +
2585                                             atten_value);
2586
2587 /*                      IWL_DEBUG_TXPOWER("calculated txpower index %d\n",
2588                                                 power_index); */
2589
2590                         if (power_index < get_min_power_index(i, band))
2591                                 power_index = get_min_power_index(i, band);
2592
2593                         /* adjust 5 GHz index to support negative indexes */
2594                         if (!band)
2595                                 power_index += 9;
2596
2597                         /* CCK, rate 32, reduce txpower for CCK */
2598                         if (i == POWER_TABLE_CCK_ENTRY)
2599                                 power_index +=
2600                                     IWL_TX_POWER_CCK_COMPENSATION_C_STEP;
2601
2602                         /* stay within the table! */
2603                         if (power_index > 107) {
2604                                 IWL_WARNING("txpower index %d > 107\n",
2605                                             power_index);
2606                                 power_index = 107;
2607                         }
2608                         if (power_index < 0) {
2609                                 IWL_WARNING("txpower index %d < 0\n",
2610                                             power_index);
2611                                 power_index = 0;
2612                         }
2613
2614                         /* fill txpower command for this rate/chain */
2615                         tx_power.s.radio_tx_gain[c] =
2616                                 gain_table[band][power_index].radio;
2617                         tx_power.s.dsp_predis_atten[c] =
2618                                 gain_table[band][power_index].dsp;
2619
2620                         IWL_DEBUG_TXPOWER("chain %d mimo %d index %d "
2621                                           "gain 0x%02x dsp %d\n",
2622                                           c, atten_value, power_index,
2623                                         tx_power.s.radio_tx_gain[c],
2624                                         tx_power.s.dsp_predis_atten[c]);
2625                 }/* for each chain */
2626
2627                 tx_power_tbl->power_tbl[i].dw = cpu_to_le32(tx_power.dw);
2628
2629         }/* for each rate */
2630
2631         return 0;
2632 }
2633
2634 /**
2635  * iwl4965_hw_reg_send_txpower - Configure the TXPOWER level user limit
2636  *
2637  * Uses the active RXON for channel, band, and characteristics (fat, high)
2638  * The power limit is taken from priv->user_txpower_limit.
2639  */
2640 int iwl4965_hw_reg_send_txpower(struct iwl4965_priv *priv)
2641 {
2642         struct iwl4965_txpowertable_cmd cmd = { 0 };
2643         int rc = 0;
2644         u8 band = 0;
2645         u8 is_fat = 0;
2646         u8 ctrl_chan_high = 0;
2647
2648         if (test_bit(STATUS_SCANNING, &priv->status)) {
2649                 /* If this gets hit a lot, switch it to a BUG() and catch
2650                  * the stack trace to find out who is calling this during
2651                  * a scan. */
2652                 IWL_WARNING("TX Power requested while scanning!\n");
2653                 return -EAGAIN;
2654         }
2655
2656         band = priv->band == IEEE80211_BAND_2GHZ;
2657
2658         is_fat =  is_fat_channel(priv->active_rxon.flags);
2659
2660         if (is_fat &&
2661             (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
2662                 ctrl_chan_high = 1;
2663
2664         cmd.band = band;
2665         cmd.channel = priv->active_rxon.channel;
2666
2667         rc = iwl4965_fill_txpower_tbl(priv, band,
2668                                 le16_to_cpu(priv->active_rxon.channel),
2669                                 is_fat, ctrl_chan_high, &cmd.tx_power);
2670         if (rc)
2671                 return rc;
2672
2673         rc = iwl4965_send_cmd_pdu(priv, REPLY_TX_PWR_TABLE_CMD, sizeof(cmd), &cmd);
2674         return rc;
2675 }
2676
2677 int iwl4965_hw_channel_switch(struct iwl4965_priv *priv, u16 channel)
2678 {
2679         int rc;
2680         u8 band = 0;
2681         u8 is_fat = 0;
2682         u8 ctrl_chan_high = 0;
2683         struct iwl4965_channel_switch_cmd cmd = { 0 };
2684         const struct iwl4965_channel_info *ch_info;
2685
2686         band = priv->band == IEEE80211_BAND_2GHZ;
2687
2688         ch_info = iwl4965_get_channel_info(priv, priv->band, channel);
2689
2690         is_fat = is_fat_channel(priv->staging_rxon.flags);
2691
2692         if (is_fat &&
2693             (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
2694                 ctrl_chan_high = 1;
2695
2696         cmd.band = band;
2697         cmd.expect_beacon = 0;
2698         cmd.channel = cpu_to_le16(channel);
2699         cmd.rxon_flags = priv->active_rxon.flags;
2700         cmd.rxon_filter_flags = priv->active_rxon.filter_flags;
2701         cmd.switch_time = cpu_to_le32(priv->ucode_beacon_time);
2702         if (ch_info)
2703                 cmd.expect_beacon = is_channel_radar(ch_info);
2704         else
2705                 cmd.expect_beacon = 1;
2706
2707         rc = iwl4965_fill_txpower_tbl(priv, band, channel, is_fat,
2708                                       ctrl_chan_high, &cmd.tx_power);
2709         if (rc) {
2710                 IWL_DEBUG_11H("error:%d  fill txpower_tbl\n", rc);
2711                 return rc;
2712         }
2713
2714         rc = iwl4965_send_cmd_pdu(priv, REPLY_CHANNEL_SWITCH, sizeof(cmd), &cmd);
2715         return rc;
2716 }
2717
2718 #define RTS_HCCA_RETRY_LIMIT            3
2719 #define RTS_DFAULT_RETRY_LIMIT          60
2720
2721 void iwl4965_hw_build_tx_cmd_rate(struct iwl4965_priv *priv,
2722                               struct iwl4965_cmd *cmd,
2723                               struct ieee80211_tx_control *ctrl,
2724                               struct ieee80211_hdr *hdr, int sta_id,
2725                               int is_hcca)
2726 {
2727         struct iwl4965_tx_cmd *tx = &cmd->cmd.tx;
2728         u8 rts_retry_limit = 0;
2729         u8 data_retry_limit = 0;
2730         u16 fc = le16_to_cpu(hdr->frame_control);
2731         u8 rate_plcp;
2732         u16 rate_flags = 0;
2733         int rate_idx = min(ctrl->tx_rate->hw_value & 0xffff, IWL_RATE_COUNT - 1);
2734
2735         rate_plcp = iwl4965_rates[rate_idx].plcp;
2736
2737         rts_retry_limit = (is_hcca) ?
2738             RTS_HCCA_RETRY_LIMIT : RTS_DFAULT_RETRY_LIMIT;
2739
2740         if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
2741                 rate_flags |= RATE_MCS_CCK_MSK;
2742
2743
2744         if (ieee80211_is_probe_response(fc)) {
2745                 data_retry_limit = 3;
2746                 if (data_retry_limit < rts_retry_limit)
2747                         rts_retry_limit = data_retry_limit;
2748         } else
2749                 data_retry_limit = IWL_DEFAULT_TX_RETRY;
2750
2751         if (priv->data_retry_limit != -1)
2752                 data_retry_limit = priv->data_retry_limit;
2753
2754
2755         if (ieee80211_is_data(fc)) {
2756                 tx->initial_rate_index = 0;
2757                 tx->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
2758         } else {
2759                 switch (fc & IEEE80211_FCTL_STYPE) {
2760                 case IEEE80211_STYPE_AUTH:
2761                 case IEEE80211_STYPE_DEAUTH:
2762                 case IEEE80211_STYPE_ASSOC_REQ:
2763                 case IEEE80211_STYPE_REASSOC_REQ:
2764                         if (tx->tx_flags & TX_CMD_FLG_RTS_MSK) {
2765                                 tx->tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2766                                 tx->tx_flags |= TX_CMD_FLG_CTS_MSK;
2767                         }
2768                         break;
2769                 default:
2770                         break;
2771                 }
2772
2773                 /* Alternate between antenna A and B for successive frames */
2774                 if (priv->use_ant_b_for_management_frame) {
2775                         priv->use_ant_b_for_management_frame = 0;
2776                         rate_flags |= RATE_MCS_ANT_B_MSK;
2777                 } else {
2778                         priv->use_ant_b_for_management_frame = 1;
2779                         rate_flags |= RATE_MCS_ANT_A_MSK;
2780                 }
2781         }
2782
2783         tx->rts_retry_limit = rts_retry_limit;
2784         tx->data_retry_limit = data_retry_limit;
2785         tx->rate_n_flags = iwl4965_hw_set_rate_n_flags(rate_plcp, rate_flags);
2786 }
2787
2788 int iwl4965_hw_get_rx_read(struct iwl4965_priv *priv)
2789 {
2790         struct iwl4965_shared *shared_data = priv->hw_setting.shared_virt;
2791
2792         return IWL_GET_BITS(*shared_data, rb_closed_stts_rb_num);
2793 }
2794
2795 int iwl4965_hw_get_temperature(struct iwl4965_priv *priv)
2796 {
2797         return priv->temperature;
2798 }
2799
2800 unsigned int iwl4965_hw_get_beacon_cmd(struct iwl4965_priv *priv,
2801                           struct iwl4965_frame *frame, u8 rate)
2802 {
2803         struct iwl4965_tx_beacon_cmd *tx_beacon_cmd;
2804         unsigned int frame_size;
2805
2806         tx_beacon_cmd = &frame->u.beacon;
2807         memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
2808
2809         tx_beacon_cmd->tx.sta_id = IWL4965_BROADCAST_ID;
2810         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2811
2812         frame_size = iwl4965_fill_beacon_frame(priv,
2813                                 tx_beacon_cmd->frame,
2814                                 iwl4965_broadcast_addr,
2815                                 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
2816
2817         BUG_ON(frame_size > MAX_MPDU_SIZE);
2818         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
2819
2820         if ((rate == IWL_RATE_1M_PLCP) || (rate >= IWL_RATE_2M_PLCP))
2821                 tx_beacon_cmd->tx.rate_n_flags =
2822                         iwl4965_hw_set_rate_n_flags(rate, RATE_MCS_CCK_MSK);
2823         else
2824                 tx_beacon_cmd->tx.rate_n_flags =
2825                         iwl4965_hw_set_rate_n_flags(rate, 0);
2826
2827         tx_beacon_cmd->tx.tx_flags = (TX_CMD_FLG_SEQ_CTL_MSK |
2828                                 TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK);
2829         return (sizeof(*tx_beacon_cmd) + frame_size);
2830 }
2831
2832 /*
2833  * Tell 4965 where to find circular buffer of Tx Frame Descriptors for
2834  * given Tx queue, and enable the DMA channel used for that queue.
2835  *
2836  * 4965 supports up to 16 Tx queues in DRAM, mapped to up to 8 Tx DMA
2837  * channels supported in hardware.
2838  */
2839 int iwl4965_hw_tx_queue_init(struct iwl4965_priv *priv, struct iwl4965_tx_queue *txq)
2840 {
2841         int rc;
2842         unsigned long flags;
2843         int txq_id = txq->q.id;
2844
2845         spin_lock_irqsave(&priv->lock, flags);
2846         rc = iwl4965_grab_nic_access(priv);
2847         if (rc) {
2848                 spin_unlock_irqrestore(&priv->lock, flags);
2849                 return rc;
2850         }
2851
2852         /* Circular buffer (TFD queue in DRAM) physical base address */
2853         iwl4965_write_direct32(priv, FH_MEM_CBBC_QUEUE(txq_id),
2854                              txq->q.dma_addr >> 8);
2855
2856         /* Enable DMA channel, using same id as for TFD queue */
2857         iwl4965_write_direct32(
2858                 priv, IWL_FH_TCSR_CHNL_TX_CONFIG_REG(txq_id),
2859                 IWL_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE |
2860                 IWL_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE_VAL);
2861         iwl4965_release_nic_access(priv);
2862         spin_unlock_irqrestore(&priv->lock, flags);
2863
2864         return 0;
2865 }
2866
2867 int iwl4965_hw_txq_attach_buf_to_tfd(struct iwl4965_priv *priv, void *ptr,
2868                                  dma_addr_t addr, u16 len)
2869 {
2870         int index, is_odd;
2871         struct iwl4965_tfd_frame *tfd = ptr;
2872         u32 num_tbs = IWL_GET_BITS(*tfd, num_tbs);
2873
2874         /* Each TFD can point to a maximum 20 Tx buffers */
2875         if ((num_tbs >= MAX_NUM_OF_TBS) || (num_tbs < 0)) {
2876                 IWL_ERROR("Error can not send more than %d chunks\n",
2877                           MAX_NUM_OF_TBS);
2878                 return -EINVAL;
2879         }
2880
2881         index = num_tbs / 2;
2882         is_odd = num_tbs & 0x1;
2883
2884         if (!is_odd) {
2885                 tfd->pa[index].tb1_addr = cpu_to_le32(addr);
2886                 IWL_SET_BITS(tfd->pa[index], tb1_addr_hi,
2887                              iwl_get_dma_hi_address(addr));
2888                 IWL_SET_BITS(tfd->pa[index], tb1_len, len);
2889         } else {
2890                 IWL_SET_BITS(tfd->pa[index], tb2_addr_lo16,
2891                              (u32) (addr & 0xffff));
2892                 IWL_SET_BITS(tfd->pa[index], tb2_addr_hi20, addr >> 16);
2893                 IWL_SET_BITS(tfd->pa[index], tb2_len, len);
2894         }
2895
2896         IWL_SET_BITS(*tfd, num_tbs, num_tbs + 1);
2897
2898         return 0;
2899 }
2900
2901 static void iwl4965_hw_card_show_info(struct iwl4965_priv *priv)
2902 {
2903         u16 hw_version = priv->eeprom.board_revision_4965;
2904
2905         IWL_DEBUG_INFO("4965ABGN HW Version %u.%u.%u\n",
2906                        ((hw_version >> 8) & 0x0F),
2907                        ((hw_version >> 8) >> 4), (hw_version & 0x00FF));
2908
2909         IWL_DEBUG_INFO("4965ABGN PBA Number %.16s\n",
2910                        priv->eeprom.board_pba_number_4965);
2911 }
2912
2913 #define IWL_TX_CRC_SIZE         4
2914 #define IWL_TX_DELIMITER_SIZE   4
2915
2916 /**
2917  * iwl4965_tx_queue_update_wr_ptr - Set up entry in Tx byte-count array
2918  */
2919 int iwl4965_tx_queue_update_wr_ptr(struct iwl4965_priv *priv,
2920                                    struct iwl4965_tx_queue *txq, u16 byte_cnt)
2921 {
2922         int len;
2923         int txq_id = txq->q.id;
2924         struct iwl4965_shared *shared_data = priv->hw_setting.shared_virt;
2925
2926         if (txq->need_update == 0)
2927                 return 0;
2928
2929         len = byte_cnt + IWL_TX_CRC_SIZE + IWL_TX_DELIMITER_SIZE;
2930
2931         /* Set up byte count within first 256 entries */
2932         IWL_SET_BITS16(shared_data->queues_byte_cnt_tbls[txq_id].
2933                        tfd_offset[txq->q.write_ptr], byte_cnt, len);
2934
2935         /* If within first 64 entries, duplicate at end */
2936         if (txq->q.write_ptr < IWL4965_MAX_WIN_SIZE)
2937                 IWL_SET_BITS16(shared_data->queues_byte_cnt_tbls[txq_id].
2938                         tfd_offset[IWL4965_QUEUE_SIZE + txq->q.write_ptr],
2939                         byte_cnt, len);
2940
2941         return 0;
2942 }
2943
2944 /**
2945  * iwl4965_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
2946  *
2947  * Selects how many and which Rx receivers/antennas/chains to use.
2948  * This should not be used for scan command ... it puts data in wrong place.
2949  */
2950 void iwl4965_set_rxon_chain(struct iwl4965_priv *priv)
2951 {
2952         u8 is_single = is_single_stream(priv);
2953         u8 idle_state, rx_state;
2954
2955         priv->staging_rxon.rx_chain = 0;
2956         rx_state = idle_state = 3;
2957
2958         /* Tell uCode which antennas are actually connected.
2959          * Before first association, we assume all antennas are connected.
2960          * Just after first association, iwl4965_noise_calibration()
2961          *    checks which antennas actually *are* connected. */
2962         priv->staging_rxon.rx_chain |=
2963             cpu_to_le16(priv->valid_antenna << RXON_RX_CHAIN_VALID_POS);
2964
2965         /* How many receivers should we use? */
2966         iwl4965_get_rx_chain_counter(priv, &idle_state, &rx_state);
2967         priv->staging_rxon.rx_chain |=
2968                 cpu_to_le16(rx_state << RXON_RX_CHAIN_MIMO_CNT_POS);
2969         priv->staging_rxon.rx_chain |=
2970                 cpu_to_le16(idle_state << RXON_RX_CHAIN_CNT_POS);
2971
2972         if (!is_single && (rx_state >= 2) &&
2973             !test_bit(STATUS_POWER_PMI, &priv->status))
2974                 priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
2975         else
2976                 priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
2977
2978         IWL_DEBUG_ASSOC("rx chain %X\n", priv->staging_rxon.rx_chain);
2979 }
2980
2981 /**
2982  * sign_extend - Sign extend a value using specified bit as sign-bit
2983  *
2984  * Example: sign_extend(9, 3) would return -7 as bit3 of 1001b is 1
2985  * and bit0..2 is 001b which when sign extended to 1111111111111001b is -7.
2986  *
2987  * @param oper value to sign extend
2988  * @param index 0 based bit index (0<=index<32) to sign bit
2989  */
2990 static s32 sign_extend(u32 oper, int index)
2991 {
2992         u8 shift = 31 - index;
2993
2994         return (s32)(oper << shift) >> shift;
2995 }
2996
2997 /**
2998  * iwl4965_get_temperature - return the calibrated temperature (in Kelvin)
2999  * @statistics: Provides the temperature reading from the uCode
3000  *
3001  * A return of <0 indicates bogus data in the statistics
3002  */
3003 int iwl4965_get_temperature(const struct iwl4965_priv *priv)
3004 {
3005         s32 temperature;
3006         s32 vt;
3007         s32 R1, R2, R3;
3008         u32 R4;
3009
3010         if (test_bit(STATUS_TEMPERATURE, &priv->status) &&
3011                 (priv->statistics.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK)) {
3012                 IWL_DEBUG_TEMP("Running FAT temperature calibration\n");
3013                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[1]);
3014                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[1]);
3015                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[1]);
3016                 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[1]);
3017         } else {
3018                 IWL_DEBUG_TEMP("Running temperature calibration\n");
3019                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[0]);
3020                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[0]);
3021                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[0]);
3022                 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[0]);
3023         }
3024
3025         /*
3026          * Temperature is only 23 bits, so sign extend out to 32.
3027          *
3028          * NOTE If we haven't received a statistics notification yet
3029          * with an updated temperature, use R4 provided to us in the
3030          * "initialize" ALIVE response.
3031          */
3032         if (!test_bit(STATUS_TEMPERATURE, &priv->status))
3033                 vt = sign_extend(R4, 23);
3034         else
3035                 vt = sign_extend(
3036                         le32_to_cpu(priv->statistics.general.temperature), 23);
3037
3038         IWL_DEBUG_TEMP("Calib values R[1-3]: %d %d %d R4: %d\n",
3039                        R1, R2, R3, vt);
3040
3041         if (R3 == R1) {
3042                 IWL_ERROR("Calibration conflict R1 == R3\n");
3043                 return -1;
3044         }
3045
3046         /* Calculate temperature in degrees Kelvin, adjust by 97%.
3047          * Add offset to center the adjustment around 0 degrees Centigrade. */
3048         temperature = TEMPERATURE_CALIB_A_VAL * (vt - R2);
3049         temperature /= (R3 - R1);
3050         temperature = (temperature * 97) / 100 +
3051             TEMPERATURE_CALIB_KELVIN_OFFSET;
3052
3053         IWL_DEBUG_TEMP("Calibrated temperature: %dK, %dC\n", temperature,
3054             KELVIN_TO_CELSIUS(temperature));
3055
3056         return temperature;
3057 }
3058
3059 /* Adjust Txpower only if temperature variance is greater than threshold. */
3060 #define IWL_TEMPERATURE_THRESHOLD   3
3061
3062 /**
3063  * iwl4965_is_temp_calib_needed - determines if new calibration is needed
3064  *
3065  * If the temperature changed has changed sufficiently, then a recalibration
3066  * is needed.
3067  *
3068  * Assumes caller will replace priv->last_temperature once calibration
3069  * executed.
3070  */
3071 static int iwl4965_is_temp_calib_needed(struct iwl4965_priv *priv)
3072 {
3073         int temp_diff;
3074
3075         if (!test_bit(STATUS_STATISTICS, &priv->status)) {
3076                 IWL_DEBUG_TEMP("Temperature not updated -- no statistics.\n");
3077                 return 0;
3078         }
3079
3080         temp_diff = priv->temperature - priv->last_temperature;
3081
3082         /* get absolute value */
3083         if (temp_diff < 0) {
3084                 IWL_DEBUG_POWER("Getting cooler, delta %d, \n", temp_diff);
3085                 temp_diff = -temp_diff;
3086         } else if (temp_diff == 0)
3087                 IWL_DEBUG_POWER("Same temp, \n");
3088         else
3089                 IWL_DEBUG_POWER("Getting warmer, delta %d, \n", temp_diff);
3090
3091         if (temp_diff < IWL_TEMPERATURE_THRESHOLD) {
3092                 IWL_DEBUG_POWER("Thermal txpower calib not needed\n");
3093                 return 0;
3094         }
3095
3096         IWL_DEBUG_POWER("Thermal txpower calib needed\n");
3097
3098         return 1;
3099 }
3100
3101 /* Calculate noise level, based on measurements during network silence just
3102  *   before arriving beacon.  This measurement can be done only if we know
3103  *   exactly when to expect beacons, therefore only when we're associated. */
3104 static void iwl4965_rx_calc_noise(struct iwl4965_priv *priv)
3105 {
3106         struct statistics_rx_non_phy *rx_info
3107                                 = &(priv->statistics.rx.general);
3108         int num_active_rx = 0;
3109         int total_silence = 0;
3110         int bcn_silence_a =
3111                 le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER;
3112         int bcn_silence_b =
3113                 le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER;
3114         int bcn_silence_c =
3115                 le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER;
3116
3117         if (bcn_silence_a) {
3118                 total_silence += bcn_silence_a;
3119                 num_active_rx++;
3120         }
3121         if (bcn_silence_b) {
3122                 total_silence += bcn_silence_b;
3123                 num_active_rx++;
3124         }
3125         if (bcn_silence_c) {
3126                 total_silence += bcn_silence_c;
3127                 num_active_rx++;
3128         }
3129
3130         /* Average among active antennas */
3131         if (num_active_rx)
3132                 priv->last_rx_noise = (total_silence / num_active_rx) - 107;
3133         else
3134                 priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
3135
3136         IWL_DEBUG_CALIB("inband silence a %u, b %u, c %u, dBm %d\n",
3137                         bcn_silence_a, bcn_silence_b, bcn_silence_c,
3138                         priv->last_rx_noise);
3139 }
3140
3141 void iwl4965_hw_rx_statistics(struct iwl4965_priv *priv, struct iwl4965_rx_mem_buffer *rxb)
3142 {
3143         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3144         int change;
3145         s32 temp;
3146
3147         IWL_DEBUG_RX("Statistics notification received (%d vs %d).\n",
3148                      (int)sizeof(priv->statistics), pkt->len);
3149
3150         change = ((priv->statistics.general.temperature !=
3151                    pkt->u.stats.general.temperature) ||
3152                   ((priv->statistics.flag &
3153                     STATISTICS_REPLY_FLG_FAT_MODE_MSK) !=
3154                    (pkt->u.stats.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK)));
3155
3156         memcpy(&priv->statistics, &pkt->u.stats, sizeof(priv->statistics));
3157
3158         set_bit(STATUS_STATISTICS, &priv->status);
3159
3160         /* Reschedule the statistics timer to occur in
3161          * REG_RECALIB_PERIOD seconds to ensure we get a
3162          * thermal update even if the uCode doesn't give
3163          * us one */
3164         mod_timer(&priv->statistics_periodic, jiffies +
3165                   msecs_to_jiffies(REG_RECALIB_PERIOD * 1000));
3166
3167         if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
3168             (pkt->hdr.cmd == STATISTICS_NOTIFICATION)) {
3169                 iwl4965_rx_calc_noise(priv);
3170 #ifdef CONFIG_IWL4965_SENSITIVITY
3171                 queue_work(priv->workqueue, &priv->sensitivity_work);
3172 #endif
3173         }
3174
3175         /* If the hardware hasn't reported a change in
3176          * temperature then don't bother computing a
3177          * calibrated temperature value */
3178         if (!change)
3179                 return;
3180
3181         temp = iwl4965_get_temperature(priv);
3182         if (temp < 0)
3183                 return;
3184
3185         if (priv->temperature != temp) {
3186                 if (priv->temperature)
3187                         IWL_DEBUG_TEMP("Temperature changed "
3188                                        "from %dC to %dC\n",
3189                                        KELVIN_TO_CELSIUS(priv->temperature),
3190                                        KELVIN_TO_CELSIUS(temp));
3191                 else
3192                         IWL_DEBUG_TEMP("Temperature "
3193                                        "initialized to %dC\n",
3194                                        KELVIN_TO_CELSIUS(temp));
3195         }
3196
3197         priv->temperature = temp;
3198         set_bit(STATUS_TEMPERATURE, &priv->status);
3199
3200         if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
3201                      iwl4965_is_temp_calib_needed(priv))
3202                 queue_work(priv->workqueue, &priv->txpower_work);
3203 }
3204
3205 static void iwl4965_add_radiotap(struct iwl4965_priv *priv,
3206                                  struct sk_buff *skb,
3207                                  struct iwl4965_rx_phy_res *rx_start,
3208                                  struct ieee80211_rx_status *stats,
3209                                  u32 ampdu_status)
3210 {
3211         s8 signal = stats->ssi;
3212         s8 noise = 0;
3213         int rate = stats->rate_idx;
3214         u64 tsf = stats->mactime;
3215         __le16 phy_flags_hw = rx_start->phy_flags;
3216         struct iwl4965_rt_rx_hdr {
3217                 struct ieee80211_radiotap_header rt_hdr;
3218                 __le64 rt_tsf;          /* TSF */
3219                 u8 rt_flags;            /* radiotap packet flags */
3220                 u8 rt_rate;             /* rate in 500kb/s */
3221                 __le16 rt_channelMHz;   /* channel in MHz */
3222                 __le16 rt_chbitmask;    /* channel bitfield */
3223                 s8 rt_dbmsignal;        /* signal in dBm, kluged to signed */
3224                 s8 rt_dbmnoise;
3225                 u8 rt_antenna;          /* antenna number */
3226         } __attribute__ ((packed)) *iwl4965_rt;
3227
3228         /* TODO: We won't have enough headroom for HT frames. Fix it later. */
3229         if (skb_headroom(skb) < sizeof(*iwl4965_rt)) {
3230                 if (net_ratelimit())
3231                         printk(KERN_ERR "not enough headroom [%d] for "
3232                                "radiotap head [%zd]\n",
3233                                skb_headroom(skb), sizeof(*iwl4965_rt));
3234                 return;
3235         }
3236
3237         /* put radiotap header in front of 802.11 header and data */
3238         iwl4965_rt = (void *)skb_push(skb, sizeof(*iwl4965_rt));
3239
3240         /* initialise radiotap header */
3241         iwl4965_rt->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
3242         iwl4965_rt->rt_hdr.it_pad = 0;
3243
3244         /* total header + data */
3245         put_unaligned(cpu_to_le16(sizeof(*iwl4965_rt)),
3246                       &iwl4965_rt->rt_hdr.it_len);
3247
3248         /* Indicate all the fields we add to the radiotap header */
3249         put_unaligned(cpu_to_le32((1 << IEEE80211_RADIOTAP_TSFT) |
3250                                   (1 << IEEE80211_RADIOTAP_FLAGS) |
3251                                   (1 << IEEE80211_RADIOTAP_RATE) |
3252                                   (1 << IEEE80211_RADIOTAP_CHANNEL) |
3253                                   (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL) |
3254                                   (1 << IEEE80211_RADIOTAP_DBM_ANTNOISE) |
3255                                   (1 << IEEE80211_RADIOTAP_ANTENNA)),
3256                       &iwl4965_rt->rt_hdr.it_present);
3257
3258         /* Zero the flags, we'll add to them as we go */
3259         iwl4965_rt->rt_flags = 0;
3260
3261         put_unaligned(cpu_to_le64(tsf), &iwl4965_rt->rt_tsf);
3262
3263         iwl4965_rt->rt_dbmsignal = signal;
3264         iwl4965_rt->rt_dbmnoise = noise;
3265
3266         /* Convert the channel frequency and set the flags */
3267         put_unaligned(cpu_to_le16(stats->freq), &iwl4965_rt->rt_channelMHz);
3268         if (!(phy_flags_hw & RX_RES_PHY_FLAGS_BAND_24_MSK))
3269                 put_unaligned(cpu_to_le16(IEEE80211_CHAN_OFDM |
3270                                           IEEE80211_CHAN_5GHZ),
3271                               &iwl4965_rt->rt_chbitmask);
3272         else if (phy_flags_hw & RX_RES_PHY_FLAGS_MOD_CCK_MSK)
3273                 put_unaligned(cpu_to_le16(IEEE80211_CHAN_CCK |
3274                                           IEEE80211_CHAN_2GHZ),
3275                               &iwl4965_rt->rt_chbitmask);
3276         else    /* 802.11g */
3277                 put_unaligned(cpu_to_le16(IEEE80211_CHAN_OFDM |
3278                                           IEEE80211_CHAN_2GHZ),
3279                               &iwl4965_rt->rt_chbitmask);
3280
3281         if (rate == -1)
3282                 iwl4965_rt->rt_rate = 0;
3283         else
3284                 iwl4965_rt->rt_rate = iwl4965_rates[rate].ieee;
3285
3286         /*
3287          * "antenna number"
3288          *
3289          * It seems that the antenna field in the phy flags value
3290          * is actually a bitfield. This is undefined by radiotap,
3291          * it wants an actual antenna number but I always get "7"
3292          * for most legacy frames I receive indicating that the
3293          * same frame was received on all three RX chains.
3294          *
3295          * I think this field should be removed in favour of a
3296          * new 802.11n radiotap field "RX chains" that is defined
3297          * as a bitmask.
3298          */
3299         iwl4965_rt->rt_antenna =
3300                 le16_to_cpu(phy_flags_hw & RX_RES_PHY_FLAGS_ANTENNA_MSK) >> 4;
3301
3302         /* set the preamble flag if appropriate */
3303         if (phy_flags_hw & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
3304                 iwl4965_rt->rt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;
3305
3306         stats->flag |= RX_FLAG_RADIOTAP;
3307 }
3308
3309 static void iwl4965_handle_data_packet(struct iwl4965_priv *priv, int is_data,
3310                                        int include_phy,
3311                                        struct iwl4965_rx_mem_buffer *rxb,
3312                                        struct ieee80211_rx_status *stats)
3313 {
3314         struct iwl4965_rx_packet *pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
3315         struct iwl4965_rx_phy_res *rx_start = (include_phy) ?
3316             (struct iwl4965_rx_phy_res *)&(pkt->u.raw[0]) : NULL;
3317         struct ieee80211_hdr *hdr;
3318         u16 len;
3319         __le32 *rx_end;
3320         unsigned int skblen;
3321         u32 ampdu_status;
3322
3323         if (!include_phy && priv->last_phy_res[0])
3324                 rx_start = (struct iwl4965_rx_phy_res *)&priv->last_phy_res[1];
3325
3326         if (!rx_start) {
3327                 IWL_ERROR("MPDU frame without a PHY data\n");
3328                 return;
3329         }
3330         if (include_phy) {
3331                 hdr = (struct ieee80211_hdr *)((u8 *) & rx_start[1] +
3332                                                rx_start->cfg_phy_cnt);
3333
3334                 len = le16_to_cpu(rx_start->byte_count);
3335
3336                 rx_end = (__le32 *) ((u8 *) & pkt->u.raw[0] +
3337                                   sizeof(struct iwl4965_rx_phy_res) +
3338                                   rx_start->cfg_phy_cnt + len);
3339
3340         } else {
3341                 struct iwl4965_rx_mpdu_res_start *amsdu =
3342                     (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw;
3343
3344                 hdr = (struct ieee80211_hdr *)(pkt->u.raw +
3345                                sizeof(struct iwl4965_rx_mpdu_res_start));
3346                 len =  le16_to_cpu(amsdu->byte_count);
3347                 rx_start->byte_count = amsdu->byte_count;
3348                 rx_end = (__le32 *) (((u8 *) hdr) + len);
3349         }
3350         if (len > priv->hw_setting.max_pkt_size || len < 16) {
3351                 IWL_WARNING("byte count out of range [16,4K] : %d\n", len);
3352                 return;
3353         }
3354
3355         ampdu_status = le32_to_cpu(*rx_end);
3356         skblen = ((u8 *) rx_end - (u8 *) & pkt->u.raw[0]) + sizeof(u32);
3357
3358         /* start from MAC */
3359         skb_reserve(rxb->skb, (void *)hdr - (void *)pkt);
3360         skb_put(rxb->skb, len); /* end where data ends */
3361
3362         /* We only process data packets if the interface is open */
3363         if (unlikely(!priv->is_open)) {
3364                 IWL_DEBUG_DROP_LIMIT
3365                     ("Dropping packet while interface is not open.\n");
3366                 return;
3367         }
3368
3369         stats->flag = 0;
3370         hdr = (struct ieee80211_hdr *)rxb->skb->data;
3371
3372         if (iwl4965_param_hwcrypto)
3373                 iwl4965_set_decrypted_flag(priv, rxb->skb, ampdu_status, stats);
3374
3375         if (priv->add_radiotap)
3376                 iwl4965_add_radiotap(priv, rxb->skb, rx_start, stats, ampdu_status);
3377
3378         ieee80211_rx_irqsafe(priv->hw, rxb->skb, stats);
3379         priv->alloc_rxb_skb--;
3380         rxb->skb = NULL;
3381 #ifdef LED
3382         priv->led_packets += len;
3383         iwl4965_setup_activity_timer(priv);
3384 #endif
3385 }
3386
3387 /* Calc max signal level (dBm) among 3 possible receivers */
3388 static int iwl4965_calc_rssi(struct iwl4965_rx_phy_res *rx_resp)
3389 {
3390         /* data from PHY/DSP regarding signal strength, etc.,
3391          *   contents are always there, not configurable by host.  */
3392         struct iwl4965_rx_non_cfg_phy *ncphy =
3393             (struct iwl4965_rx_non_cfg_phy *)rx_resp->non_cfg_phy;
3394         u32 agc = (le16_to_cpu(ncphy->agc_info) & IWL_AGC_DB_MASK)
3395                         >> IWL_AGC_DB_POS;
3396
3397         u32 valid_antennae =
3398             (le16_to_cpu(rx_resp->phy_flags) & RX_PHY_FLAGS_ANTENNAE_MASK)
3399                         >> RX_PHY_FLAGS_ANTENNAE_OFFSET;
3400         u8 max_rssi = 0;
3401         u32 i;
3402
3403         /* Find max rssi among 3 possible receivers.
3404          * These values are measured by the digital signal processor (DSP).
3405          * They should stay fairly constant even as the signal strength varies,
3406          *   if the radio's automatic gain control (AGC) is working right.
3407          * AGC value (see below) will provide the "interesting" info. */
3408         for (i = 0; i < 3; i++)
3409                 if (valid_antennae & (1 << i))
3410                         max_rssi = max(ncphy->rssi_info[i << 1], max_rssi);
3411
3412         IWL_DEBUG_STATS("Rssi In A %d B %d C %d Max %d AGC dB %d\n",
3413                 ncphy->rssi_info[0], ncphy->rssi_info[2], ncphy->rssi_info[4],
3414                 max_rssi, agc);
3415
3416         /* dBm = max_rssi dB - agc dB - constant.
3417          * Higher AGC (higher radio gain) means lower signal. */
3418         return (max_rssi - agc - IWL_RSSI_OFFSET);
3419 }
3420
3421 #ifdef CONFIG_IWL4965_HT
3422
3423 /* Parsed Information Elements */
3424 struct ieee802_11_elems {
3425         u8 *ds_params;
3426         u8 ds_params_len;
3427         u8 *tim;
3428         u8 tim_len;
3429         u8 *ibss_params;
3430         u8 ibss_params_len;
3431         u8 *erp_info;
3432         u8 erp_info_len;
3433         u8 *ht_cap_param;
3434         u8 ht_cap_param_len;
3435         u8 *ht_extra_param;
3436         u8 ht_extra_param_len;
3437 };
3438
3439 static int parse_elems(u8 *start, size_t len, struct ieee802_11_elems *elems)
3440 {
3441         size_t left = len;
3442         u8 *pos = start;
3443         int unknown = 0;
3444
3445         memset(elems, 0, sizeof(*elems));
3446
3447         while (left >= 2) {
3448                 u8 id, elen;
3449
3450                 id = *pos++;
3451                 elen = *pos++;
3452                 left -= 2;
3453
3454                 if (elen > left)
3455                         return -1;
3456
3457                 switch (id) {
3458                 case WLAN_EID_DS_PARAMS:
3459                         elems->ds_params = pos;
3460                         elems->ds_params_len = elen;
3461                         break;
3462                 case WLAN_EID_TIM:
3463                         elems->tim = pos;
3464                         elems->tim_len = elen;
3465                         break;
3466                 case WLAN_EID_IBSS_PARAMS:
3467                         elems->ibss_params = pos;
3468                         elems->ibss_params_len = elen;
3469                         break;
3470                 case WLAN_EID_ERP_INFO:
3471                         elems->erp_info = pos;
3472                         elems->erp_info_len = elen;
3473                         break;
3474                 case WLAN_EID_HT_CAPABILITY:
3475                         elems->ht_cap_param = pos;
3476                         elems->ht_cap_param_len = elen;
3477                         break;
3478                 case WLAN_EID_HT_EXTRA_INFO:
3479                         elems->ht_extra_param = pos;
3480                         elems->ht_extra_param_len = elen;
3481                         break;
3482                 default:
3483                         unknown++;
3484                         break;
3485                 }
3486
3487                 left -= elen;
3488                 pos += elen;
3489         }
3490
3491         return 0;
3492 }
3493
3494 void iwl4965_init_ht_hw_capab(struct ieee80211_ht_info *ht_info,
3495                               enum ieee80211_band band)
3496 {
3497         ht_info->cap = 0;
3498         memset(ht_info->supp_mcs_set, 0, 16);
3499
3500         ht_info->ht_supported = 1;
3501
3502         if (band == IEEE80211_BAND_5GHZ) {
3503                 ht_info->cap |= (u16)IEEE80211_HT_CAP_SUP_WIDTH;
3504                 ht_info->cap |= (u16)IEEE80211_HT_CAP_SGI_40;
3505                 ht_info->supp_mcs_set[4] = 0x01;
3506         }
3507         ht_info->cap |= (u16)IEEE80211_HT_CAP_GRN_FLD;
3508         ht_info->cap |= (u16)IEEE80211_HT_CAP_SGI_20;
3509         ht_info->cap |= (u16)(IEEE80211_HT_CAP_MIMO_PS &
3510                              (IWL_MIMO_PS_NONE << 2));
3511         if (iwl4965_param_amsdu_size_8K) {
3512                 printk(KERN_DEBUG "iwl4965 in A-MSDU 8K support mode\n");
3513                 ht_info->cap |= (u16)IEEE80211_HT_CAP_MAX_AMSDU;
3514         }
3515
3516         ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
3517         ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
3518
3519         ht_info->supp_mcs_set[0] = 0xFF;
3520         ht_info->supp_mcs_set[1] = 0xFF;
3521 }
3522 #endif /* CONFIG_IWL4965_HT */
3523
3524 static void iwl4965_sta_modify_ps_wake(struct iwl4965_priv *priv, int sta_id)
3525 {
3526         unsigned long flags;
3527
3528         spin_lock_irqsave(&priv->sta_lock, flags);
3529         priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
3530         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
3531         priv->stations[sta_id].sta.sta.modify_mask = 0;
3532         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3533         spin_unlock_irqrestore(&priv->sta_lock, flags);
3534
3535         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
3536 }
3537
3538 static void iwl4965_update_ps_mode(struct iwl4965_priv *priv, u16 ps_bit, u8 *addr)
3539 {
3540         /* FIXME: need locking over ps_status ??? */
3541         u8 sta_id = iwl4965_hw_find_station(priv, addr);
3542
3543         if (sta_id != IWL_INVALID_STATION) {
3544                 u8 sta_awake = priv->stations[sta_id].
3545                                 ps_status == STA_PS_STATUS_WAKE;
3546
3547                 if (sta_awake && ps_bit)
3548                         priv->stations[sta_id].ps_status = STA_PS_STATUS_SLEEP;
3549                 else if (!sta_awake && !ps_bit) {
3550                         iwl4965_sta_modify_ps_wake(priv, sta_id);
3551                         priv->stations[sta_id].ps_status = STA_PS_STATUS_WAKE;
3552                 }
3553         }
3554 }
3555 #ifdef CONFIG_IWL4965_DEBUG
3556
3557 /**
3558  * iwl4965_dbg_report_frame - dump frame to syslog during debug sessions
3559  *
3560  * You may hack this function to show different aspects of received frames,
3561  * including selective frame dumps.
3562  * group100 parameter selects whether to show 1 out of 100 good frames.
3563  *
3564  * TODO:  This was originally written for 3945, need to audit for
3565  *        proper operation with 4965.
3566  */
3567 static void iwl4965_dbg_report_frame(struct iwl4965_priv *priv,
3568                       struct iwl4965_rx_packet *pkt,
3569                       struct ieee80211_hdr *header, int group100)
3570 {
3571         u32 to_us;
3572         u32 print_summary = 0;
3573         u32 print_dump = 0;     /* set to 1 to dump all frames' contents */
3574         u32 hundred = 0;
3575         u32 dataframe = 0;
3576         u16 fc;
3577         u16 seq_ctl;
3578         u16 channel;
3579         u16 phy_flags;
3580         int rate_sym;
3581         u16 length;
3582         u16 status;
3583         u16 bcn_tmr;
3584         u32 tsf_low;
3585         u64 tsf;
3586         u8 rssi;
3587         u8 agc;
3588         u16 sig_avg;
3589         u16 noise_diff;
3590         struct iwl4965_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
3591         struct iwl4965_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
3592         struct iwl4965_rx_frame_end *rx_end = IWL_RX_END(pkt);
3593         u8 *data = IWL_RX_DATA(pkt);
3594
3595         if (likely(!(iwl4965_debug_level & IWL_DL_RX)))
3596                 return;
3597
3598         /* MAC header */
3599         fc = le16_to_cpu(header->frame_control);
3600         seq_ctl = le16_to_cpu(header->seq_ctrl);
3601
3602         /* metadata */
3603         channel = le16_to_cpu(rx_hdr->channel);
3604         phy_flags = le16_to_cpu(rx_hdr->phy_flags);
3605         rate_sym = rx_hdr->rate;
3606         length = le16_to_cpu(rx_hdr->len);
3607
3608         /* end-of-frame status and timestamp */
3609         status = le32_to_cpu(rx_end->status);
3610         bcn_tmr = le32_to_cpu(rx_end->beacon_timestamp);
3611         tsf_low = le64_to_cpu(rx_end->timestamp) & 0x0ffffffff;
3612         tsf = le64_to_cpu(rx_end->timestamp);
3613
3614         /* signal statistics */
3615         rssi = rx_stats->rssi;
3616         agc = rx_stats->agc;
3617         sig_avg = le16_to_cpu(rx_stats->sig_avg);
3618         noise_diff = le16_to_cpu(rx_stats->noise_diff);
3619
3620         to_us = !compare_ether_addr(header->addr1, priv->mac_addr);
3621
3622         /* if data frame is to us and all is good,
3623          *   (optionally) print summary for only 1 out of every 100 */
3624         if (to_us && (fc & ~IEEE80211_FCTL_PROTECTED) ==
3625             (IEEE80211_FCTL_FROMDS | IEEE80211_FTYPE_DATA)) {
3626                 dataframe = 1;
3627                 if (!group100)
3628                         print_summary = 1;      /* print each frame */
3629                 else if (priv->framecnt_to_us < 100) {
3630                         priv->framecnt_to_us++;
3631                         print_summary = 0;
3632                 } else {
3633                         priv->framecnt_to_us = 0;
3634                         print_summary = 1;
3635                         hundred = 1;
3636                 }
3637         } else {
3638                 /* print summary for all other frames */
3639                 print_summary = 1;
3640         }
3641
3642         if (print_summary) {
3643                 char *title;
3644                 int rate_idx;
3645                 u32 bitrate;
3646
3647                 if (hundred)
3648                         title = "100Frames";
3649                 else if (fc & IEEE80211_FCTL_RETRY)
3650                         title = "Retry";
3651                 else if (ieee80211_is_assoc_response(fc))
3652                         title = "AscRsp";
3653                 else if (ieee80211_is_reassoc_response(fc))
3654                         title = "RasRsp";
3655                 else if (ieee80211_is_probe_response(fc)) {
3656                         title = "PrbRsp";
3657                         print_dump = 1; /* dump frame contents */
3658                 } else if (ieee80211_is_beacon(fc)) {
3659                         title = "Beacon";
3660                         print_dump = 1; /* dump frame contents */
3661                 } else if (ieee80211_is_atim(fc))
3662                         title = "ATIM";
3663                 else if (ieee80211_is_auth(fc))
3664                         title = "Auth";
3665                 else if (ieee80211_is_deauth(fc))
3666                         title = "DeAuth";
3667                 else if (ieee80211_is_disassoc(fc))
3668                         title = "DisAssoc";
3669                 else
3670                         title = "Frame";
3671
3672                 rate_idx = iwl4965_hwrate_to_plcp_idx(rate_sym);
3673                 if (unlikely(rate_idx == -1))
3674                         bitrate = 0;
3675                 else
3676                         bitrate = iwl4965_rates[rate_idx].ieee / 2;
3677
3678                 /* print frame summary.
3679                  * MAC addresses show just the last byte (for brevity),
3680                  *    but you can hack it to show more, if you'd like to. */
3681                 if (dataframe)
3682                         IWL_DEBUG_RX("%s: mhd=0x%04x, dst=0x%02x, "
3683                                      "len=%u, rssi=%d, chnl=%d, rate=%u, \n",
3684                                      title, fc, header->addr1[5],
3685                                      length, rssi, channel, bitrate);
3686                 else {
3687                         /* src/dst addresses assume managed mode */
3688                         IWL_DEBUG_RX("%s: 0x%04x, dst=0x%02x, "
3689                                      "src=0x%02x, rssi=%u, tim=%lu usec, "
3690                                      "phy=0x%02x, chnl=%d\n",
3691                                      title, fc, header->addr1[5],
3692                                      header->addr3[5], rssi,
3693                                      tsf_low - priv->scan_start_tsf,
3694                                      phy_flags, channel);
3695                 }
3696         }
3697         if (print_dump)
3698                 iwl4965_print_hex_dump(IWL_DL_RX, data, length);
3699 }
3700 #else
3701 static inline void iwl4965_dbg_report_frame(struct iwl4965_priv *priv,
3702                                             struct iwl4965_rx_packet *pkt,
3703                                             struct ieee80211_hdr *header,
3704                                             int group100)
3705 {
3706 }
3707 #endif
3708
3709
3710 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
3711
3712 /* Called for REPLY_4965_RX (legacy ABG frames), or
3713  * REPLY_RX_MPDU_CMD (HT high-throughput N frames). */
3714 static void iwl4965_rx_reply_rx(struct iwl4965_priv *priv,
3715                                 struct iwl4965_rx_mem_buffer *rxb)
3716 {
3717         struct ieee80211_hdr *header;
3718         struct ieee80211_rx_status rx_status;
3719         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3720         /* Use phy data (Rx signal strength, etc.) contained within
3721          *   this rx packet for legacy frames,
3722          *   or phy data cached from REPLY_RX_PHY_CMD for HT frames. */
3723         int include_phy = (pkt->hdr.cmd == REPLY_4965_RX);
3724         struct iwl4965_rx_phy_res *rx_start = (include_phy) ?
3725                 (struct iwl4965_rx_phy_res *)&(pkt->u.raw[0]) :
3726                 (struct iwl4965_rx_phy_res *)&priv->last_phy_res[1];
3727         __le32 *rx_end;
3728         unsigned int len = 0;
3729         u16 fc;
3730         u8 network_packet;
3731
3732         rx_status.mactime = le64_to_cpu(rx_start->timestamp);
3733         rx_status.freq = ieee80211chan2mhz(le16_to_cpu(rx_start->channel));
3734         rx_status.band = (rx_start->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ?
3735                                 IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
3736         rx_status.rate_idx = iwl4965_hwrate_to_plcp_idx(
3737                                         le32_to_cpu(rx_start->rate_n_flags));
3738
3739         if (rx_status.band == IEEE80211_BAND_5GHZ)
3740                 rx_status.rate_idx -= IWL_FIRST_OFDM_RATE;
3741
3742         rx_status.antenna = 0;
3743         rx_status.flag = 0;
3744
3745         if ((unlikely(rx_start->cfg_phy_cnt > 20))) {
3746                 IWL_DEBUG_DROP
3747                         ("dsp size out of range [0,20]: "
3748                          "%d/n", rx_start->cfg_phy_cnt);
3749                 return;
3750         }
3751
3752         if (!include_phy) {
3753                 if (priv->last_phy_res[0])
3754                         rx_start = (struct iwl4965_rx_phy_res *)
3755                                 &priv->last_phy_res[1];
3756                 else
3757                         rx_start = NULL;
3758         }
3759
3760         if (!rx_start) {
3761                 IWL_ERROR("MPDU frame without a PHY data\n");
3762                 return;
3763         }
3764
3765         if (include_phy) {
3766                 header = (struct ieee80211_hdr *)((u8 *) & rx_start[1]
3767                                                   + rx_start->cfg_phy_cnt);
3768
3769                 len = le16_to_cpu(rx_start->byte_count);
3770                 rx_end = (__le32 *)(pkt->u.raw + rx_start->cfg_phy_cnt +
3771                                   sizeof(struct iwl4965_rx_phy_res) + len);
3772         } else {
3773                 struct iwl4965_rx_mpdu_res_start *amsdu =
3774                         (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw;
3775
3776                 header = (void *)(pkt->u.raw +
3777                         sizeof(struct iwl4965_rx_mpdu_res_start));
3778                 len = le16_to_cpu(amsdu->byte_count);
3779                 rx_end = (__le32 *) (pkt->u.raw +
3780                         sizeof(struct iwl4965_rx_mpdu_res_start) + len);
3781         }
3782
3783         if (!(*rx_end & RX_RES_STATUS_NO_CRC32_ERROR) ||
3784             !(*rx_end & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
3785                 IWL_DEBUG_RX("Bad CRC or FIFO: 0x%08X.\n",
3786                                 le32_to_cpu(*rx_end));
3787                 return;
3788         }
3789
3790         priv->ucode_beacon_time = le32_to_cpu(rx_start->beacon_time_stamp);
3791
3792         /* Find max signal strength (dBm) among 3 antenna/receiver chains */
3793         rx_status.ssi = iwl4965_calc_rssi(rx_start);
3794
3795         /* Meaningful noise values are available only from beacon statistics,
3796          *   which are gathered only when associated, and indicate noise
3797          *   only for the associated network channel ...
3798          * Ignore these noise values while scanning (other channels) */
3799         if (iwl4965_is_associated(priv) &&
3800             !test_bit(STATUS_SCANNING, &priv->status)) {
3801                 rx_status.noise = priv->last_rx_noise;
3802                 rx_status.signal = iwl4965_calc_sig_qual(rx_status.ssi,
3803                                                          rx_status.noise);
3804         } else {
3805                 rx_status.noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
3806                 rx_status.signal = iwl4965_calc_sig_qual(rx_status.ssi, 0);
3807         }
3808
3809         /* Reset beacon noise level if not associated. */
3810         if (!iwl4965_is_associated(priv))
3811                 priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
3812
3813         /* Set "1" to report good data frames in groups of 100 */
3814         /* FIXME: need to optimze the call: */
3815         iwl4965_dbg_report_frame(priv, pkt, header, 1);
3816
3817         IWL_DEBUG_STATS_LIMIT("Rssi %d, noise %d, qual %d, TSF %llu\n",
3818                               rx_status.ssi, rx_status.noise, rx_status.signal,
3819                               rx_status.mactime);
3820
3821         network_packet = iwl4965_is_network_packet(priv, header);
3822         if (network_packet) {
3823                 priv->last_rx_rssi = rx_status.ssi;
3824                 priv->last_beacon_time =  priv->ucode_beacon_time;
3825                 priv->last_tsf = le64_to_cpu(rx_start->timestamp);
3826         }
3827
3828         fc = le16_to_cpu(header->frame_control);
3829         switch (fc & IEEE80211_FCTL_FTYPE) {
3830         case IEEE80211_FTYPE_MGMT:
3831
3832                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
3833                         iwl4965_update_ps_mode(priv, fc  & IEEE80211_FCTL_PM,
3834                                                 header->addr2);
3835                 switch (fc & IEEE80211_FCTL_STYPE) {
3836                 case IEEE80211_STYPE_PROBE_RESP:
3837                 case IEEE80211_STYPE_BEACON:
3838                         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA &&
3839                              !compare_ether_addr(header->addr2, priv->bssid)) ||
3840                             (priv->iw_mode == IEEE80211_IF_TYPE_IBSS &&
3841                              !compare_ether_addr(header->addr3, priv->bssid))) {
3842                                 struct ieee80211_mgmt *mgmt =
3843                                         (struct ieee80211_mgmt *)header;
3844                                 u64 timestamp =
3845                                         le64_to_cpu(mgmt->u.beacon.timestamp);
3846
3847                                 priv->timestamp0 = timestamp & 0xFFFFFFFF;
3848                                 priv->timestamp1 =
3849                                         (timestamp >> 32) & 0xFFFFFFFF;
3850                                 priv->beacon_int = le16_to_cpu(
3851                                     mgmt->u.beacon.beacon_int);
3852                                 if (priv->call_post_assoc_from_beacon &&
3853                                     (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
3854                                         priv->call_post_assoc_from_beacon = 0;
3855                                         queue_work(priv->workqueue,
3856                                             &priv->post_associate.work);
3857                                 }
3858                         }
3859                         break;
3860
3861                 case IEEE80211_STYPE_ACTION:
3862                         break;
3863
3864                         /*
3865                          * TODO: Use the new callback function from
3866                          * mac80211 instead of sniffing these packets.
3867                          */
3868                 case IEEE80211_STYPE_ASSOC_RESP:
3869                 case IEEE80211_STYPE_REASSOC_RESP:
3870                         if (network_packet) {
3871 #ifdef CONFIG_IWL4965_HT
3872                                 u8 *pos = NULL;
3873                                 struct ieee802_11_elems elems;
3874 #endif                          /*CONFIG_IWL4965_HT */
3875                                 struct ieee80211_mgmt *mgnt =
3876                                         (struct ieee80211_mgmt *)header;
3877
3878                                 /* We have just associated, give some
3879                                  * time for the 4-way handshake if
3880                                  * any. Don't start scan too early. */
3881                                 priv->next_scan_jiffies = jiffies +
3882                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
3883
3884                                 priv->assoc_id = (~((1 << 15) | (1 << 14))
3885                                         & le16_to_cpu(mgnt->u.assoc_resp.aid));
3886                                 priv->assoc_capability =
3887                                         le16_to_cpu(
3888                                                 mgnt->u.assoc_resp.capab_info);
3889 #ifdef CONFIG_IWL4965_HT
3890                                 pos = mgnt->u.assoc_resp.variable;
3891                                 if (!parse_elems(pos,
3892                                                  len - (pos - (u8 *) mgnt),
3893                                                  &elems)) {
3894                                         if (elems.ht_extra_param &&
3895                                             elems.ht_cap_param)
3896                                                 break;
3897                                 }
3898 #endif                          /*CONFIG_IWL4965_HT */
3899                                 /* assoc_id is 0 no association */
3900                                 if (!priv->assoc_id)
3901                                         break;
3902                                 if (priv->beacon_int)
3903                                         queue_work(priv->workqueue,
3904                                             &priv->post_associate.work);
3905                                 else
3906                                         priv->call_post_assoc_from_beacon = 1;
3907                         }
3908
3909                         break;
3910
3911                 case IEEE80211_STYPE_PROBE_REQ:
3912                         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
3913                             !iwl4965_is_associated(priv)) {
3914                                 DECLARE_MAC_BUF(mac1);
3915                                 DECLARE_MAC_BUF(mac2);
3916                                 DECLARE_MAC_BUF(mac3);
3917
3918                                 IWL_DEBUG_DROP("Dropping (non network): "
3919                                                "%s, %s, %s\n",
3920                                                print_mac(mac1, header->addr1),
3921                                                print_mac(mac2, header->addr2),
3922                                                print_mac(mac3, header->addr3));
3923                                 return;
3924                         }
3925                 }
3926                 iwl4965_handle_data_packet(priv, 0, include_phy, rxb, &rx_status);
3927                 break;
3928
3929         case IEEE80211_FTYPE_CTL:
3930 #ifdef CONFIG_IWL4965_HT
3931                 switch (fc & IEEE80211_FCTL_STYPE) {
3932                 case IEEE80211_STYPE_BACK_REQ:
3933                         IWL_DEBUG_HT("IEEE80211_STYPE_BACK_REQ arrived\n");
3934                         iwl4965_handle_data_packet(priv, 0, include_phy,
3935                                                 rxb, &rx_status);
3936                         break;
3937                 default:
3938                         break;
3939                 }
3940 #endif
3941                 break;
3942
3943         case IEEE80211_FTYPE_DATA: {
3944                 DECLARE_MAC_BUF(mac1);
3945                 DECLARE_MAC_BUF(mac2);
3946                 DECLARE_MAC_BUF(mac3);
3947
3948                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
3949                         iwl4965_update_ps_mode(priv, fc  & IEEE80211_FCTL_PM,
3950                                                 header->addr2);
3951
3952                 if (unlikely(!network_packet))
3953                         IWL_DEBUG_DROP("Dropping (non network): "
3954                                        "%s, %s, %s\n",
3955                                        print_mac(mac1, header->addr1),
3956                                        print_mac(mac2, header->addr2),
3957                                        print_mac(mac3, header->addr3));
3958                 else if (unlikely(iwl4965_is_duplicate_packet(priv, header)))
3959                         IWL_DEBUG_DROP("Dropping (dup): %s, %s, %s\n",
3960                                        print_mac(mac1, header->addr1),
3961                                        print_mac(mac2, header->addr2),
3962                                        print_mac(mac3, header->addr3));
3963                 else
3964                         iwl4965_handle_data_packet(priv, 1, include_phy, rxb,
3965                                                    &rx_status);
3966                 break;
3967         }
3968         default:
3969                 break;
3970
3971         }
3972 }
3973
3974 /* Cache phy data (Rx signal strength, etc) for HT frame (REPLY_RX_PHY_CMD).
3975  * This will be used later in iwl4965_rx_reply_rx() for REPLY_RX_MPDU_CMD. */
3976 static void iwl4965_rx_reply_rx_phy(struct iwl4965_priv *priv,
3977                                     struct iwl4965_rx_mem_buffer *rxb)
3978 {
3979         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3980         priv->last_phy_res[0] = 1;
3981         memcpy(&priv->last_phy_res[1], &(pkt->u.raw[0]),
3982                sizeof(struct iwl4965_rx_phy_res));
3983 }
3984
3985 static void iwl4965_rx_missed_beacon_notif(struct iwl4965_priv *priv,
3986                                            struct iwl4965_rx_mem_buffer *rxb)
3987
3988 {
3989 #ifdef CONFIG_IWL4965_SENSITIVITY
3990         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3991         struct iwl4965_missed_beacon_notif *missed_beacon;
3992
3993         missed_beacon = &pkt->u.missed_beacon;
3994         if (le32_to_cpu(missed_beacon->consequtive_missed_beacons) > 5) {
3995                 IWL_DEBUG_CALIB("missed bcn cnsq %d totl %d rcd %d expctd %d\n",
3996                     le32_to_cpu(missed_beacon->consequtive_missed_beacons),
3997                     le32_to_cpu(missed_beacon->total_missed_becons),
3998                     le32_to_cpu(missed_beacon->num_recvd_beacons),
3999                     le32_to_cpu(missed_beacon->num_expected_beacons));
4000                 priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
4001                 if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)))
4002                         queue_work(priv->workqueue, &priv->sensitivity_work);
4003         }
4004 #endif /*CONFIG_IWL4965_SENSITIVITY*/
4005 }
4006
4007 #ifdef CONFIG_IWL4965_HT
4008
4009 /**
4010  * iwl4965_sta_modify_enable_tid_tx - Enable Tx for this TID in station table
4011  */
4012 static void iwl4965_sta_modify_enable_tid_tx(struct iwl4965_priv *priv,
4013                                          int sta_id, int tid)
4014 {
4015         unsigned long flags;
4016
4017         /* Remove "disable" flag, to enable Tx for this TID */
4018         spin_lock_irqsave(&priv->sta_lock, flags);
4019         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
4020         priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
4021         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
4022         spin_unlock_irqrestore(&priv->sta_lock, flags);
4023
4024         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
4025 }
4026
4027 /**
4028  * iwl4965_tx_status_reply_compressed_ba - Update tx status from block-ack
4029  *
4030  * Go through block-ack's bitmap of ACK'd frames, update driver's record of
4031  * ACK vs. not.  This gets sent to mac80211, then to rate scaling algo.
4032  */
4033 static int iwl4965_tx_status_reply_compressed_ba(struct iwl4965_priv *priv,
4034                                                  struct iwl4965_ht_agg *agg,
4035                                                  struct iwl4965_compressed_ba_resp*
4036                                                  ba_resp)
4037
4038 {
4039         int i, sh, ack;
4040         u16 seq_ctl = le16_to_cpu(ba_resp->seq_ctl);
4041         u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
4042         u64 bitmap;
4043         int successes = 0;
4044         struct ieee80211_tx_status *tx_status;
4045
4046         if (unlikely(!agg->wait_for_ba))  {
4047                 IWL_ERROR("Received BA when not expected\n");
4048                 return -EINVAL;
4049         }
4050
4051         /* Mark that the expected block-ack response arrived */
4052         agg->wait_for_ba = 0;
4053         IWL_DEBUG_TX_REPLY("BA %d %d\n", agg->start_idx, ba_resp->seq_ctl);
4054
4055         /* Calculate shift to align block-ack bits with our Tx window bits */
4056         sh = agg->start_idx - SEQ_TO_INDEX(seq_ctl>>4);
4057         if (sh < 0) /* tbw something is wrong with indices */
4058                 sh += 0x100;
4059
4060         /* don't use 64-bit values for now */
4061         bitmap = le64_to_cpu(ba_resp->bitmap) >> sh;
4062
4063         if (agg->frame_count > (64 - sh)) {
4064                 IWL_DEBUG_TX_REPLY("more frames than bitmap size");
4065                 return -1;
4066         }
4067
4068         /* check for success or failure according to the
4069          * transmitted bitmap and block-ack bitmap */
4070         bitmap &= agg->bitmap;
4071
4072         /* For each frame attempted in aggregation,
4073          * update driver's record of tx frame's status. */
4074         for (i = 0; i < agg->frame_count ; i++) {
4075                 ack = bitmap & (1 << i);
4076                 successes += !!ack;
4077                 IWL_DEBUG_TX_REPLY("%s ON i=%d idx=%d raw=%d\n",
4078                         ack? "ACK":"NACK", i, (agg->start_idx + i) & 0xff,
4079                         agg->start_idx + i);
4080         }
4081
4082         tx_status = &priv->txq[scd_flow].txb[agg->start_idx].status;
4083         tx_status->flags = IEEE80211_TX_STATUS_ACK;
4084         tx_status->flags |= IEEE80211_TX_STATUS_AMPDU;
4085         tx_status->ampdu_ack_map = successes;
4086         tx_status->ampdu_ack_len = agg->frame_count;
4087         /* FIXME Wrong rate
4088         tx_status->control.tx_rate = agg->rate_n_flags;
4089         */
4090
4091         IWL_DEBUG_TX_REPLY("Bitmap %llx\n", bitmap);
4092
4093         return 0;
4094 }
4095
4096 /**
4097  * iwl4965_tx_queue_stop_scheduler - Stop queue, but keep configuration
4098  */
4099 static void iwl4965_tx_queue_stop_scheduler(struct iwl4965_priv *priv,
4100                                             u16 txq_id)
4101 {
4102         /* Simply stop the queue, but don't change any configuration;
4103          * the SCD_ACT_EN bit is the write-enable mask for the ACTIVE bit. */
4104         iwl4965_write_prph(priv,
4105                 KDR_SCD_QUEUE_STATUS_BITS(txq_id),
4106                 (0 << SCD_QUEUE_STTS_REG_POS_ACTIVE)|
4107                 (1 << SCD_QUEUE_STTS_REG_POS_SCD_ACT_EN));
4108 }
4109
4110 /**
4111  * txq_id must be greater than IWL_BACK_QUEUE_FIRST_ID
4112  */
4113 static int iwl4965_tx_queue_agg_disable(struct iwl4965_priv *priv, u16 txq_id,
4114                                         u16 ssn_idx, u8 tx_fifo)
4115 {
4116         if (IWL_BACK_QUEUE_FIRST_ID > txq_id) {
4117                 IWL_WARNING("queue number too small: %d, must be > %d\n",
4118                                 txq_id, IWL_BACK_QUEUE_FIRST_ID);
4119                 return -EINVAL;
4120         }
4121
4122         iwl4965_tx_queue_stop_scheduler(priv, txq_id);
4123
4124         iwl4965_clear_bits_prph(priv, KDR_SCD_QUEUECHAIN_SEL, (1 << txq_id));
4125
4126         priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
4127         priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
4128         /* supposes that ssn_idx is valid (!= 0xFFF) */
4129         iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
4130
4131         iwl4965_clear_bits_prph(priv, KDR_SCD_INTERRUPT_MASK, (1 << txq_id));
4132         iwl4965_txq_ctx_deactivate(priv, txq_id);
4133         iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 0);
4134
4135         return 0;
4136 }
4137
4138 int iwl4965_check_empty_hw_queue(struct iwl4965_priv *priv, int sta_id,
4139                                          u8 tid, int txq_id)
4140 {
4141         struct iwl4965_queue *q = &priv->txq[txq_id].q;
4142         u8 *addr = priv->stations[sta_id].sta.sta.addr;
4143         struct iwl4965_tid_data *tid_data = &priv->stations[sta_id].tid[tid];
4144
4145         switch (priv->stations[sta_id].tid[tid].agg.state) {
4146         case IWL_EMPTYING_HW_QUEUE_DELBA:
4147                 /* We are reclaiming the last packet of the */
4148                 /* aggregated HW queue */
4149                 if (txq_id  == tid_data->agg.txq_id &&
4150                     q->read_ptr == q->write_ptr) {
4151                         u16 ssn = SEQ_TO_SN(tid_data->seq_number);
4152                         int tx_fifo = default_tid_to_tx_fifo[tid];
4153                         IWL_DEBUG_HT("HW queue empty: continue DELBA flow\n");
4154                         iwl4965_tx_queue_agg_disable(priv, txq_id,
4155                                                      ssn, tx_fifo);
4156                         tid_data->agg.state = IWL_AGG_OFF;
4157                         ieee80211_stop_tx_ba_cb_irqsafe(priv->hw, addr, tid);
4158                 }
4159                 break;
4160         case IWL_EMPTYING_HW_QUEUE_ADDBA:
4161                 /* We are reclaiming the last packet of the queue */
4162                 if (tid_data->tfds_in_queue == 0) {
4163                         IWL_DEBUG_HT("HW queue empty: continue ADDBA flow\n");
4164                         tid_data->agg.state = IWL_AGG_ON;
4165                         ieee80211_start_tx_ba_cb_irqsafe(priv->hw, addr, tid);
4166                 }
4167                 break;
4168         }
4169         return 0;
4170 }
4171
4172 /**
4173  * iwl4965_queue_dec_wrap - Decrement queue index, wrap back to end if needed
4174  * @index -- current index
4175  * @n_bd -- total number of entries in queue (s/b power of 2)
4176  */
4177 static inline int iwl4965_queue_dec_wrap(int index, int n_bd)
4178 {
4179         return (index == 0) ? n_bd - 1 : index - 1;
4180 }
4181
4182 /**
4183  * iwl4965_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
4184  *
4185  * Handles block-acknowledge notification from device, which reports success
4186  * of frames sent via aggregation.
4187  */
4188 static void iwl4965_rx_reply_compressed_ba(struct iwl4965_priv *priv,
4189                                            struct iwl4965_rx_mem_buffer *rxb)
4190 {
4191         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
4192         struct iwl4965_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba;
4193         int index;
4194         struct iwl4965_tx_queue *txq = NULL;
4195         struct iwl4965_ht_agg *agg;
4196         DECLARE_MAC_BUF(mac);
4197
4198         /* "flow" corresponds to Tx queue */
4199         u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
4200
4201         /* "ssn" is start of block-ack Tx window, corresponds to index
4202          * (in Tx queue's circular buffer) of first TFD/frame in window */
4203         u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
4204
4205         if (scd_flow >= ARRAY_SIZE(priv->txq)) {
4206                 IWL_ERROR("BUG_ON scd_flow is bigger than number of queues");
4207                 return;
4208         }
4209
4210         txq = &priv->txq[scd_flow];
4211         agg = &priv->stations[ba_resp->sta_id].tid[ba_resp->tid].agg;
4212
4213         /* Find index just before block-ack window */
4214         index = iwl4965_queue_dec_wrap(ba_resp_scd_ssn & 0xff, txq->q.n_bd);
4215
4216         /* TODO: Need to get this copy more safely - now good for debug */
4217
4218         IWL_DEBUG_TX_REPLY("REPLY_COMPRESSED_BA [%d]Received from %s, "
4219                            "sta_id = %d\n",
4220                            agg->wait_for_ba,
4221                            print_mac(mac, (u8*) &ba_resp->sta_addr_lo32),
4222                            ba_resp->sta_id);
4223         IWL_DEBUG_TX_REPLY("TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = "
4224                            "%d, scd_ssn = %d\n",
4225                            ba_resp->tid,
4226                            ba_resp->seq_ctl,
4227                            ba_resp->bitmap,
4228                            ba_resp->scd_flow,
4229                            ba_resp->scd_ssn);
4230         IWL_DEBUG_TX_REPLY("DAT start_idx = %d, bitmap = 0x%llx \n",
4231                            agg->start_idx,
4232                            agg->bitmap);
4233
4234         /* Update driver's record of ACK vs. not for each frame in window */
4235         iwl4965_tx_status_reply_compressed_ba(priv, agg, ba_resp);
4236
4237         /* Release all TFDs before the SSN, i.e. all TFDs in front of
4238          * block-ack window (we assume that they've been successfully
4239          * transmitted ... if not, it's too late anyway). */
4240         if (txq->q.read_ptr != (ba_resp_scd_ssn & 0xff)) {
4241                 int freed = iwl4965_tx_queue_reclaim(priv, scd_flow, index);
4242                 priv->stations[ba_resp->sta_id].
4243                         tid[ba_resp->tid].tfds_in_queue -= freed;
4244                 if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
4245                         priv->mac80211_registered &&
4246                         agg->state != IWL_EMPTYING_HW_QUEUE_DELBA)
4247                         ieee80211_wake_queue(priv->hw, scd_flow);
4248                 iwl4965_check_empty_hw_queue(priv, ba_resp->sta_id,
4249                         ba_resp->tid, scd_flow);
4250         }
4251 }
4252
4253 /**
4254  * iwl4965_tx_queue_set_q2ratid - Map unique receiver/tid combination to a queue
4255  */
4256 static int iwl4965_tx_queue_set_q2ratid(struct iwl4965_priv *priv, u16 ra_tid,
4257                                         u16 txq_id)
4258 {
4259         u32 tbl_dw_addr;
4260         u32 tbl_dw;
4261         u16 scd_q2ratid;
4262
4263         scd_q2ratid = ra_tid & SCD_QUEUE_RA_TID_MAP_RATID_MSK;
4264
4265         tbl_dw_addr = priv->scd_base_addr +
4266                         SCD_TRANSLATE_TBL_OFFSET_QUEUE(txq_id);
4267
4268         tbl_dw = iwl4965_read_targ_mem(priv, tbl_dw_addr);
4269
4270         if (txq_id & 0x1)
4271                 tbl_dw = (scd_q2ratid << 16) | (tbl_dw & 0x0000FFFF);
4272         else
4273                 tbl_dw = scd_q2ratid | (tbl_dw & 0xFFFF0000);
4274
4275         iwl4965_write_targ_mem(priv, tbl_dw_addr, tbl_dw);
4276
4277         return 0;
4278 }
4279
4280
4281 /**
4282  * iwl4965_tx_queue_agg_enable - Set up & enable aggregation for selected queue
4283  *
4284  * NOTE:  txq_id must be greater than IWL_BACK_QUEUE_FIRST_ID,
4285  *        i.e. it must be one of the higher queues used for aggregation
4286  */
4287 static int iwl4965_tx_queue_agg_enable(struct iwl4965_priv *priv, int txq_id,
4288                                        int tx_fifo, int sta_id, int tid,
4289                                        u16 ssn_idx)
4290 {
4291         unsigned long flags;
4292         int rc;
4293         u16 ra_tid;
4294
4295         if (IWL_BACK_QUEUE_FIRST_ID > txq_id)
4296                 IWL_WARNING("queue number too small: %d, must be > %d\n",
4297                         txq_id, IWL_BACK_QUEUE_FIRST_ID);
4298
4299         ra_tid = BUILD_RAxTID(sta_id, tid);
4300
4301         /* Modify device's station table to Tx this TID */
4302         iwl4965_sta_modify_enable_tid_tx(priv, sta_id, tid);
4303
4304         spin_lock_irqsave(&priv->lock, flags);
4305         rc = iwl4965_grab_nic_access(priv);
4306         if (rc) {
4307                 spin_unlock_irqrestore(&priv->lock, flags);
4308                 return rc;
4309         }
4310
4311         /* Stop this Tx queue before configuring it */
4312         iwl4965_tx_queue_stop_scheduler(priv, txq_id);
4313
4314         /* Map receiver-address / traffic-ID to this queue */
4315         iwl4965_tx_queue_set_q2ratid(priv, ra_tid, txq_id);
4316
4317         /* Set this queue as a chain-building queue */
4318         iwl4965_set_bits_prph(priv, KDR_SCD_QUEUECHAIN_SEL, (1 << txq_id));
4319
4320         /* Place first TFD at index corresponding to start sequence number.
4321          * Assumes that ssn_idx is valid (!= 0xFFF) */
4322         priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
4323         priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
4324         iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
4325
4326         /* Set up Tx window size and frame limit for this queue */
4327         iwl4965_write_targ_mem(priv,
4328                         priv->scd_base_addr + SCD_CONTEXT_QUEUE_OFFSET(txq_id),
4329                         (SCD_WIN_SIZE << SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
4330                         SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
4331
4332         iwl4965_write_targ_mem(priv, priv->scd_base_addr +
4333                         SCD_CONTEXT_QUEUE_OFFSET(txq_id) + sizeof(u32),
4334                         (SCD_FRAME_LIMIT << SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS)
4335                         & SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
4336
4337         iwl4965_set_bits_prph(priv, KDR_SCD_INTERRUPT_MASK, (1 << txq_id));
4338
4339         /* Set up Status area in SRAM, map to Tx DMA/FIFO, activate the queue */
4340         iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 1);
4341
4342         iwl4965_release_nic_access(priv);
4343         spin_unlock_irqrestore(&priv->lock, flags);
4344
4345         return 0;
4346 }
4347
4348 #endif /* CONFIG_IWL4965_HT */
4349
4350 /**
4351  * iwl4965_add_station - Initialize a station's hardware rate table
4352  *
4353  * The uCode's station table contains a table of fallback rates
4354  * for automatic fallback during transmission.
4355  *
4356  * NOTE: This sets up a default set of values.  These will be replaced later
4357  *       if the driver's iwl-4965-rs rate scaling algorithm is used, instead of
4358  *       rc80211_simple.
4359  *
4360  * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
4361  *       calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
4362  *       which requires station table entry to exist).
4363  */
4364 void iwl4965_add_station(struct iwl4965_priv *priv, const u8 *addr, int is_ap)
4365 {
4366         int i, r;
4367         struct iwl4965_link_quality_cmd link_cmd = {
4368                 .reserved1 = 0,
4369         };
4370         u16 rate_flags;
4371
4372         /* Set up the rate scaling to start at selected rate, fall back
4373          * all the way down to 1M in IEEE order, and then spin on 1M */
4374         if (is_ap)
4375                 r = IWL_RATE_54M_INDEX;
4376         else if (priv->band == IEEE80211_BAND_5GHZ)
4377                 r = IWL_RATE_6M_INDEX;
4378         else
4379                 r = IWL_RATE_1M_INDEX;
4380
4381         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
4382                 rate_flags = 0;
4383                 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
4384                         rate_flags |= RATE_MCS_CCK_MSK;
4385
4386                 /* Use Tx antenna B only */
4387                 rate_flags |= RATE_MCS_ANT_B_MSK;
4388                 rate_flags &= ~RATE_MCS_ANT_A_MSK;
4389
4390                 link_cmd.rs_table[i].rate_n_flags =
4391                         iwl4965_hw_set_rate_n_flags(iwl4965_rates[r].plcp, rate_flags);
4392                 r = iwl4965_get_prev_ieee_rate(r);
4393         }
4394
4395         link_cmd.general_params.single_stream_ant_msk = 2;
4396         link_cmd.general_params.dual_stream_ant_msk = 3;
4397         link_cmd.agg_params.agg_dis_start_th = 3;
4398         link_cmd.agg_params.agg_time_limit = cpu_to_le16(4000);
4399
4400         /* Update the rate scaling for control frame Tx to AP */
4401         link_cmd.sta_id = is_ap ? IWL_AP_ID : IWL4965_BROADCAST_ID;
4402
4403         iwl4965_send_cmd_pdu(priv, REPLY_TX_LINK_QUALITY_CMD, sizeof(link_cmd),
4404                          &link_cmd);
4405 }
4406
4407 #ifdef CONFIG_IWL4965_HT
4408
4409 static u8 iwl4965_is_channel_extension(struct iwl4965_priv *priv,
4410                                        enum ieee80211_band band,
4411                                        u16 channel, u8 extension_chan_offset)
4412 {
4413         const struct iwl4965_channel_info *ch_info;
4414
4415         ch_info = iwl4965_get_channel_info(priv, band, channel);
4416         if (!is_channel_valid(ch_info))
4417                 return 0;
4418
4419         if (extension_chan_offset == IWL_EXT_CHANNEL_OFFSET_AUTO)
4420                 return 0;
4421
4422         if ((ch_info->fat_extension_channel == extension_chan_offset) ||
4423             (ch_info->fat_extension_channel == HT_IE_EXT_CHANNEL_MAX))
4424                 return 1;
4425
4426         return 0;
4427 }
4428
4429 static u8 iwl4965_is_fat_tx_allowed(struct iwl4965_priv *priv,
4430                                 struct ieee80211_ht_info *sta_ht_inf)
4431 {
4432         struct iwl_ht_info *iwl_ht_conf = &priv->current_ht_config;
4433
4434         if ((!iwl_ht_conf->is_ht) ||
4435            (iwl_ht_conf->supported_chan_width != IWL_CHANNEL_WIDTH_40MHZ) ||
4436            (iwl_ht_conf->extension_chan_offset == IWL_EXT_CHANNEL_OFFSET_AUTO))
4437                 return 0;
4438
4439         if (sta_ht_inf) {
4440                 if ((!sta_ht_inf->ht_supported) ||
4441                    (!(sta_ht_inf->cap & IEEE80211_HT_CAP_SUP_WIDTH)))
4442                         return 0;
4443         }
4444
4445         return (iwl4965_is_channel_extension(priv, priv->band,
4446                                          iwl_ht_conf->control_channel,
4447                                          iwl_ht_conf->extension_chan_offset));
4448 }
4449
4450 void iwl4965_set_rxon_ht(struct iwl4965_priv *priv, struct iwl_ht_info *ht_info)
4451 {
4452         struct iwl4965_rxon_cmd *rxon = &priv->staging_rxon;
4453         u32 val;
4454
4455         if (!ht_info->is_ht)
4456                 return;
4457
4458         /* Set up channel bandwidth:  20 MHz only, or 20/40 mixed if fat ok */
4459         if (iwl4965_is_fat_tx_allowed(priv, NULL))
4460                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED_MSK;
4461         else
4462                 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
4463                                  RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
4464
4465         if (le16_to_cpu(rxon->channel) != ht_info->control_channel) {
4466                 IWL_DEBUG_ASSOC("control diff than current %d %d\n",
4467                                 le16_to_cpu(rxon->channel),
4468                                 ht_info->control_channel);
4469                 rxon->channel = cpu_to_le16(ht_info->control_channel);
4470                 return;
4471         }
4472
4473         /* Note: control channel is opposite of extension channel */
4474         switch (ht_info->extension_chan_offset) {
4475         case IWL_EXT_CHANNEL_OFFSET_ABOVE:
4476                 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
4477                 break;
4478         case IWL_EXT_CHANNEL_OFFSET_BELOW:
4479                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
4480                 break;
4481         case IWL_EXT_CHANNEL_OFFSET_AUTO:
4482                 rxon->flags &= ~RXON_FLG_CHANNEL_MODE_MIXED_MSK;
4483                 break;
4484         default:
4485                 rxon->flags &= ~RXON_FLG_CHANNEL_MODE_MIXED_MSK;
4486                 break;
4487         }
4488
4489         val = ht_info->ht_protection;
4490
4491         rxon->flags |= cpu_to_le32(val << RXON_FLG_HT_OPERATING_MODE_POS);
4492
4493         iwl4965_set_rxon_chain(priv);
4494
4495         IWL_DEBUG_ASSOC("supported HT rate 0x%X %X "
4496                         "rxon flags 0x%X operation mode :0x%X "
4497                         "extension channel offset 0x%x "
4498                         "control chan %d\n",
4499                         ht_info->supp_mcs_set[0], ht_info->supp_mcs_set[1],
4500                         le32_to_cpu(rxon->flags), ht_info->ht_protection,
4501                         ht_info->extension_chan_offset,
4502                         ht_info->control_channel);
4503         return;
4504 }
4505
4506 void iwl4965_set_ht_add_station(struct iwl4965_priv *priv, u8 index,
4507                                 struct ieee80211_ht_info *sta_ht_inf)
4508 {
4509         __le32 sta_flags;
4510         u8 mimo_ps_mode;
4511
4512         if (!sta_ht_inf || !sta_ht_inf->ht_supported)
4513                 goto done;
4514
4515         mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2;
4516
4517         sta_flags = priv->stations[index].sta.station_flags;
4518
4519         sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
4520
4521         switch (mimo_ps_mode) {
4522         case WLAN_HT_CAP_MIMO_PS_STATIC:
4523                 sta_flags |= STA_FLG_MIMO_DIS_MSK;
4524                 break;
4525         case WLAN_HT_CAP_MIMO_PS_DYNAMIC:
4526                 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
4527                 break;
4528         case WLAN_HT_CAP_MIMO_PS_DISABLED:
4529                 break;
4530         default:
4531                 IWL_WARNING("Invalid MIMO PS mode %d", mimo_ps_mode);
4532                 break;
4533         }
4534
4535         sta_flags |= cpu_to_le32(
4536               (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
4537
4538         sta_flags |= cpu_to_le32(
4539               (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
4540
4541         if (iwl4965_is_fat_tx_allowed(priv, sta_ht_inf))
4542                 sta_flags |= STA_FLG_FAT_EN_MSK;
4543         else
4544                 sta_flags &= ~STA_FLG_FAT_EN_MSK;
4545
4546         priv->stations[index].sta.station_flags = sta_flags;
4547  done:
4548         return;
4549 }
4550
4551 static void iwl4965_sta_modify_add_ba_tid(struct iwl4965_priv *priv,
4552                                           int sta_id, int tid, u16 ssn)
4553 {
4554         unsigned long flags;
4555
4556         spin_lock_irqsave(&priv->sta_lock, flags);
4557         priv->stations[sta_id].sta.station_flags_msk = 0;
4558         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
4559         priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
4560         priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
4561         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
4562         spin_unlock_irqrestore(&priv->sta_lock, flags);
4563
4564         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
4565 }
4566
4567 static void iwl4965_sta_modify_del_ba_tid(struct iwl4965_priv *priv,
4568                                           int sta_id, int tid)
4569 {
4570         unsigned long flags;
4571
4572         spin_lock_irqsave(&priv->sta_lock, flags);
4573         priv->stations[sta_id].sta.station_flags_msk = 0;
4574         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
4575         priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
4576         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
4577         spin_unlock_irqrestore(&priv->sta_lock, flags);
4578
4579         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
4580 }
4581
4582 /*
4583  * Find first available (lowest unused) Tx Queue, mark it "active".
4584  * Called only when finding queue for aggregation.
4585  * Should never return anything < 7, because they should already
4586  * be in use as EDCA AC (0-3), Command (4), HCCA (5, 6).
4587  */
4588 static int iwl4965_txq_ctx_activate_free(struct iwl4965_priv *priv)
4589 {
4590         int txq_id;
4591
4592         for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++)
4593                 if (!test_and_set_bit(txq_id, &priv->txq_ctx_active_msk))
4594                         return txq_id;
4595         return -1;
4596 }
4597
4598 static int iwl4965_mac_ht_tx_agg_start(struct ieee80211_hw *hw, const u8 *da,
4599                                        u16 tid, u16 *start_seq_num)
4600 {
4601         struct iwl4965_priv *priv = hw->priv;
4602         int sta_id;
4603         int tx_fifo;
4604         int txq_id;
4605         int ssn = -1;
4606         int rc = 0;
4607         unsigned long flags;
4608         struct iwl4965_tid_data *tid_data;
4609         DECLARE_MAC_BUF(mac);
4610
4611         if (likely(tid < ARRAY_SIZE(default_tid_to_tx_fifo)))
4612                 tx_fifo = default_tid_to_tx_fifo[tid];
4613         else
4614                 return -EINVAL;
4615
4616         IWL_WARNING("%s on da = %s tid = %d\n",
4617                         __func__, print_mac(mac, da), tid);
4618
4619         sta_id = iwl4965_hw_find_station(priv, da);
4620         if (sta_id == IWL_INVALID_STATION)
4621                 return -ENXIO;
4622
4623         if (priv->stations[sta_id].tid[tid].agg.state != IWL_AGG_OFF) {
4624                 IWL_ERROR("Start AGG when state is not IWL_AGG_OFF !\n");
4625                 return -ENXIO;
4626         }
4627
4628         txq_id = iwl4965_txq_ctx_activate_free(priv);
4629         if (txq_id == -1)
4630                 return -ENXIO;
4631
4632         spin_lock_irqsave(&priv->sta_lock, flags);
4633         tid_data = &priv->stations[sta_id].tid[tid];
4634         ssn = SEQ_TO_SN(tid_data->seq_number);
4635         tid_data->agg.txq_id = txq_id;
4636         spin_unlock_irqrestore(&priv->sta_lock, flags);
4637
4638         *start_seq_num = ssn;
4639         rc = iwl4965_tx_queue_agg_enable(priv, txq_id, tx_fifo,
4640                                            sta_id, tid, ssn);
4641         if (rc)
4642                 return rc;
4643
4644         rc = 0;
4645         if (tid_data->tfds_in_queue == 0) {
4646                 printk(KERN_ERR "HW queue is empty\n");
4647                 tid_data->agg.state = IWL_AGG_ON;
4648                 ieee80211_start_tx_ba_cb_irqsafe(hw, da, tid);
4649         } else {
4650                 IWL_DEBUG_HT("HW queue is NOT empty: %d packets in HW queue\n",
4651                                 tid_data->tfds_in_queue);
4652                 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA;
4653         }
4654         return rc;
4655 }
4656
4657 static int iwl4965_mac_ht_tx_agg_stop(struct ieee80211_hw *hw, const u8 *da,
4658                                       u16 tid)
4659 {
4660
4661         struct iwl4965_priv *priv = hw->priv;
4662         int tx_fifo_id, txq_id, sta_id, ssn = -1;
4663         struct iwl4965_tid_data *tid_data;
4664         int rc, write_ptr, read_ptr;
4665         unsigned long flags;
4666         DECLARE_MAC_BUF(mac);
4667
4668         if (!da) {
4669                 IWL_ERROR("da = NULL\n");
4670                 return -EINVAL;
4671         }
4672
4673         if (likely(tid < ARRAY_SIZE(default_tid_to_tx_fifo)))
4674                 tx_fifo_id = default_tid_to_tx_fifo[tid];
4675         else
4676                 return -EINVAL;
4677
4678         sta_id = iwl4965_hw_find_station(priv, da);
4679
4680         if (sta_id == IWL_INVALID_STATION)
4681                 return -ENXIO;
4682
4683         if (priv->stations[sta_id].tid[tid].agg.state != IWL_AGG_ON)
4684                 IWL_WARNING("Stopping AGG while state not IWL_AGG_ON\n");
4685
4686         tid_data = &priv->stations[sta_id].tid[tid];
4687         ssn = (tid_data->seq_number & IEEE80211_SCTL_SEQ) >> 4;
4688         txq_id = tid_data->agg.txq_id;
4689         write_ptr = priv->txq[txq_id].q.write_ptr;
4690         read_ptr = priv->txq[txq_id].q.read_ptr;
4691
4692         /* The queue is not empty */
4693         if (write_ptr != read_ptr) {
4694                 IWL_DEBUG_HT("Stopping a non empty AGG HW QUEUE\n");
4695                 priv->stations[sta_id].tid[tid].agg.state =
4696                                 IWL_EMPTYING_HW_QUEUE_DELBA;
4697                 return 0;
4698         }
4699
4700         IWL_DEBUG_HT("HW queue empty\n");;
4701         priv->stations[sta_id].tid[tid].agg.state = IWL_AGG_OFF;
4702
4703         spin_lock_irqsave(&priv->lock, flags);
4704         rc = iwl4965_grab_nic_access(priv);
4705         if (rc) {
4706                 spin_unlock_irqrestore(&priv->lock, flags);
4707                 return rc;
4708         }
4709         rc = iwl4965_tx_queue_agg_disable(priv, txq_id, ssn, tx_fifo_id);
4710         iwl4965_release_nic_access(priv);
4711         spin_unlock_irqrestore(&priv->lock, flags);
4712
4713         if (rc)
4714                 return rc;
4715
4716         ieee80211_stop_tx_ba_cb_irqsafe(priv->hw, da, tid);
4717
4718         IWL_DEBUG_INFO("iwl4965_mac_ht_tx_agg_stop on da=%s tid=%d\n",
4719                         print_mac(mac, da), tid);
4720
4721         return 0;
4722 }
4723
4724 int iwl4965_mac_ampdu_action(struct ieee80211_hw *hw,
4725                              enum ieee80211_ampdu_mlme_action action,
4726                              const u8 *addr, u16 tid, u16 *ssn)
4727 {
4728         struct iwl4965_priv *priv = hw->priv;
4729         int sta_id;
4730         DECLARE_MAC_BUF(mac);
4731
4732         IWL_DEBUG_HT("A-MPDU action on da=%s tid=%d ",
4733                         print_mac(mac, addr), tid);
4734         sta_id = iwl4965_hw_find_station(priv, addr);
4735         switch (action) {
4736         case IEEE80211_AMPDU_RX_START:
4737                 IWL_DEBUG_HT("start Rx\n");
4738                 iwl4965_sta_modify_add_ba_tid(priv, sta_id, tid, *ssn);
4739                 break;
4740         case IEEE80211_AMPDU_RX_STOP:
4741                 IWL_DEBUG_HT("stop Rx\n");
4742                 iwl4965_sta_modify_del_ba_tid(priv, sta_id, tid);
4743                 break;
4744         case IEEE80211_AMPDU_TX_START:
4745                 IWL_DEBUG_HT("start Tx\n");
4746                 return iwl4965_mac_ht_tx_agg_start(hw, addr, tid, ssn);
4747         case IEEE80211_AMPDU_TX_STOP:
4748                 IWL_DEBUG_HT("stop Tx\n");
4749                 return iwl4965_mac_ht_tx_agg_stop(hw, addr, tid);
4750         default:
4751                 IWL_DEBUG_HT("unknown\n");
4752                 return -EINVAL;
4753                 break;
4754         }
4755         return 0;
4756 }
4757
4758 #endif /* CONFIG_IWL4965_HT */
4759
4760 /* Set up 4965-specific Rx frame reply handlers */
4761 void iwl4965_hw_rx_handler_setup(struct iwl4965_priv *priv)
4762 {
4763         /* Legacy Rx frames */
4764         priv->rx_handlers[REPLY_4965_RX] = iwl4965_rx_reply_rx;
4765
4766         /* High-throughput (HT) Rx frames */
4767         priv->rx_handlers[REPLY_RX_PHY_CMD] = iwl4965_rx_reply_rx_phy;
4768         priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwl4965_rx_reply_rx;
4769
4770         priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] =
4771             iwl4965_rx_missed_beacon_notif;
4772
4773 #ifdef CONFIG_IWL4965_HT
4774         priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl4965_rx_reply_compressed_ba;
4775 #endif /* CONFIG_IWL4965_HT */
4776 }
4777
4778 void iwl4965_hw_setup_deferred_work(struct iwl4965_priv *priv)
4779 {
4780         INIT_WORK(&priv->txpower_work, iwl4965_bg_txpower_work);
4781         INIT_WORK(&priv->statistics_work, iwl4965_bg_statistics_work);
4782 #ifdef CONFIG_IWL4965_SENSITIVITY
4783         INIT_WORK(&priv->sensitivity_work, iwl4965_bg_sensitivity_work);
4784 #endif
4785         init_timer(&priv->statistics_periodic);
4786         priv->statistics_periodic.data = (unsigned long)priv;
4787         priv->statistics_periodic.function = iwl4965_bg_statistics_periodic;
4788 }
4789
4790 void iwl4965_hw_cancel_deferred_work(struct iwl4965_priv *priv)
4791 {
4792         del_timer_sync(&priv->statistics_periodic);
4793
4794         cancel_delayed_work(&priv->init_alive_start);
4795 }
4796
4797 struct pci_device_id iwl4965_hw_card_ids[] = {
4798         {PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x4229)},
4799         {PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x4230)},
4800         {0}
4801 };
4802
4803 /*
4804  * The device's EEPROM semaphore prevents conflicts between driver and uCode
4805  * when accessing the EEPROM; each access is a series of pulses to/from the
4806  * EEPROM chip, not a single event, so even reads could conflict if they
4807  * weren't arbitrated by the semaphore.
4808  */
4809 int iwl4965_eeprom_acquire_semaphore(struct iwl4965_priv *priv)
4810 {
4811         u16 count;
4812         int rc;
4813
4814         for (count = 0; count < EEPROM_SEM_RETRY_LIMIT; count++) {
4815                 /* Request semaphore */
4816                 iwl4965_set_bit(priv, CSR_HW_IF_CONFIG_REG,
4817                         CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM);
4818
4819                 /* See if we got it */
4820                 rc = iwl4965_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
4821                                         CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM,
4822                                         CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM,
4823                                         EEPROM_SEM_TIMEOUT);
4824                 if (rc >= 0) {
4825                         IWL_DEBUG_IO("Acquired semaphore after %d tries.\n",
4826                                 count+1);
4827                         return rc;
4828                 }
4829         }
4830
4831         return rc;
4832 }
4833
4834 MODULE_DEVICE_TABLE(pci, iwl4965_hw_card_ids);