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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2008 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-eeprom.h"
  42 #include "iwl-core.h"
  43 #include "iwl-4965.h"
  44 #include "iwl-helpers.h"
  45
  46 static void iwl4965_hw_card_show_info(struct iwl_priv *priv);
  47
  48 #define IWL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np)    \
  49         [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP,      \
  50                                     IWL_RATE_SISO_##s##M_PLCP, \
  51                                     IWL_RATE_MIMO_##s##M_PLCP, \
  52                                     IWL_RATE_##r##M_IEEE,      \
  53                                     IWL_RATE_##ip##M_INDEX,    \
  54                                     IWL_RATE_##in##M_INDEX,    \
  55                                     IWL_RATE_##rp##M_INDEX,    \
  56                                     IWL_RATE_##rn##M_INDEX,    \
  57                                     IWL_RATE_##pp##M_INDEX,    \
  58                                     IWL_RATE_##np##M_INDEX }
  59
  60 /*
  61  * Parameter order:
  62  *   rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate
  63  *
  64  * If there isn't a valid next or previous rate then INV is used which
  65  * maps to IWL_RATE_INVALID
  66  *
  67  */
  68 const struct iwl4965_rate_info iwl4965_rates[IWL_RATE_COUNT] = {
  69         IWL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2),    /*  1mbps */
  70         IWL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5),          /*  2mbps */
  71         IWL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11),        /*5.5mbps */
  72         IWL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18),      /* 11mbps */
  73         IWL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11),        /*  6mbps */
  74         IWL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11),       /*  9mbps */
  75         IWL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18),   /* 12mbps */
  76         IWL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24),   /* 18mbps */
  77         IWL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36),   /* 24mbps */
  78         IWL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48),   /* 36mbps */
  79         IWL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54),   /* 48mbps */
  80         IWL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */
  81         IWL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */
  82 };
  83
  84 #ifdef CONFIG_IWL4965_HT
  85
  86 static const u16 default_tid_to_tx_fifo[] = {
  87         IWL_TX_FIFO_AC1,
  88         IWL_TX_FIFO_AC0,
  89         IWL_TX_FIFO_AC0,
  90         IWL_TX_FIFO_AC1,
  91         IWL_TX_FIFO_AC2,
  92         IWL_TX_FIFO_AC2,
  93         IWL_TX_FIFO_AC3,
  94         IWL_TX_FIFO_AC3,
  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_NONE,
 102         IWL_TX_FIFO_NONE,
 103         IWL_TX_FIFO_AC3
 104 };
 105
 106 #endif  /*CONFIG_IWL4965_HT */
 107
 108 static int iwl4965_init_drv(struct iwl_priv *priv)
 109 {
 110         int ret;
 111         int i;
 112
 113         priv->antenna = (enum iwl4965_antenna)iwl4965_mod_params.antenna;
 114         priv->retry_rate = 1;
 115         priv->ibss_beacon = NULL;
 116
 117         spin_lock_init(&priv->lock);
 118         spin_lock_init(&priv->power_data.lock);
 119         spin_lock_init(&priv->sta_lock);
 120         spin_lock_init(&priv->hcmd_lock);
 121         spin_lock_init(&priv->lq_mngr.lock);
 122
 123         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++)
 124                 INIT_LIST_HEAD(&priv->ibss_mac_hash[i]);
 125
 126         INIT_LIST_HEAD(&priv->free_frames);
 127
 128         mutex_init(&priv->mutex);
 129
 130         /* Clear the driver's (not device's) station table */
 131         iwlcore_clear_stations_table(priv);
 132
 133         priv->data_retry_limit = -1;
 134         priv->ieee_channels = NULL;
 135         priv->ieee_rates = NULL;
 136         priv->band = IEEE80211_BAND_2GHZ;
 137
 138         priv->iw_mode = IEEE80211_IF_TYPE_STA;
 139
 140         priv->use_ant_b_for_management_frame = 1; /* start with ant B */
 141         priv->valid_antenna = 0x7;      /* assume all 3 connected */
 142         priv->ps_mode = IWL_MIMO_PS_NONE;
 143
 144         /* Choose which receivers/antennas to use */
 145         iwl4965_set_rxon_chain(priv);
 146
 147         iwlcore_reset_qos(priv);
 148
 149         priv->qos_data.qos_active = 0;
 150         priv->qos_data.qos_cap.val = 0;
 151
 152         iwlcore_set_rxon_channel(priv, IEEE80211_BAND_2GHZ, 6);
 153
 154         priv->rates_mask = IWL_RATES_MASK;
 155         /* If power management is turned on, default to AC mode */
 156         priv->power_mode = IWL_POWER_AC;
 157         priv->user_txpower_limit = IWL_DEFAULT_TX_POWER;
 158
 159         ret = iwl_init_channel_map(priv);
 160         if (ret) {
 161                 IWL_ERROR("initializing regulatory failed: %d\n", ret);
 162                 goto err;
 163         }
 164
 165         ret = iwl4965_init_geos(priv);
 166         if (ret) {
 167                 IWL_ERROR("initializing geos failed: %d\n", ret);
 168                 goto err_free_channel_map;
 169         }
 170
 171         iwl4965_rate_control_register(priv->hw);
 172         ret = ieee80211_register_hw(priv->hw);
 173         if (ret) {
 174                 IWL_ERROR("Failed to register network device (error %d)\n",
 175                                 ret);
 176                 goto err_free_geos;
 177         }
 178
 179         priv->hw->conf.beacon_int = 100;
 180         priv->mac80211_registered = 1;
 181
 182         return 0;
 183
 184 err_free_geos:
 185         iwl4965_free_geos(priv);
 186 err_free_channel_map:
 187         iwl_free_channel_map(priv);
 188 err:
 189         return ret;
 190 }
 191
 192 static int is_fat_channel(__le32 rxon_flags)
 193 {
 194         return (rxon_flags & RXON_FLG_CHANNEL_MODE_PURE_40_MSK) ||
 195                 (rxon_flags & RXON_FLG_CHANNEL_MODE_MIXED_MSK);
 196 }
 197
 198 static u8 is_single_stream(struct iwl_priv *priv)
 199 {
 200 #ifdef CONFIG_IWL4965_HT
 201         if (!priv->current_ht_config.is_ht ||
 202             (priv->current_ht_config.supp_mcs_set[1] == 0) ||
 203             (priv->ps_mode == IWL_MIMO_PS_STATIC))
 204                 return 1;
 205 #else
 206         return 1;
 207 #endif  /*CONFIG_IWL4965_HT */
 208         return 0;
 209 }
 210
 211 int iwl4965_hwrate_to_plcp_idx(u32 rate_n_flags)
 212 {
 213         int idx = 0;
 214
 215         /* 4965 HT rate format */
 216         if (rate_n_flags & RATE_MCS_HT_MSK) {
 217                 idx = (rate_n_flags & 0xff);
 218
 219                 if (idx >= IWL_RATE_MIMO_6M_PLCP)
 220                         idx = idx - IWL_RATE_MIMO_6M_PLCP;
 221
 222                 idx += IWL_FIRST_OFDM_RATE;
 223                 /* skip 9M not supported in ht*/
 224                 if (idx >= IWL_RATE_9M_INDEX)
 225                         idx += 1;
 226                 if ((idx >= IWL_FIRST_OFDM_RATE) && (idx <= IWL_LAST_OFDM_RATE))
 227                         return idx;
 228
 229         /* 4965 legacy rate format, search for match in table */
 230         } else {
 231                 for (idx = 0; idx < ARRAY_SIZE(iwl4965_rates); idx++)
 232                         if (iwl4965_rates[idx].plcp == (rate_n_flags & 0xFF))
 233                                 return idx;
 234         }
 235
 236         return -1;
 237 }
 238
 239 /**
 240  * translate ucode response to mac80211 tx status control values
 241  */
 242 void iwl4965_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
 243                                   struct ieee80211_tx_control *control)
 244 {
 245         int rate_index;
 246
 247         control->antenna_sel_tx =
 248                 ((rate_n_flags & RATE_MCS_ANT_AB_MSK) >> RATE_MCS_ANT_A_POS);
 249         if (rate_n_flags & RATE_MCS_HT_MSK)
 250                 control->flags |= IEEE80211_TXCTL_OFDM_HT;
 251         if (rate_n_flags & RATE_MCS_GF_MSK)
 252                 control->flags |= IEEE80211_TXCTL_GREEN_FIELD;
 253         if (rate_n_flags & RATE_MCS_FAT_MSK)
 254                 control->flags |= IEEE80211_TXCTL_40_MHZ_WIDTH;
 255         if (rate_n_flags & RATE_MCS_DUP_MSK)
 256                 control->flags |= IEEE80211_TXCTL_DUP_DATA;
 257         if (rate_n_flags & RATE_MCS_SGI_MSK)
 258                 control->flags |= IEEE80211_TXCTL_SHORT_GI;
 259         /* since iwl4965_hwrate_to_plcp_idx is band indifferent, we always use
 260          * IEEE80211_BAND_2GHZ band as it contains all the rates */
 261         rate_index = iwl4965_hwrate_to_plcp_idx(rate_n_flags);
 262         if (rate_index == -1)
 263                 control->tx_rate = NULL;
 264         else
 265                 control->tx_rate =
 266                         &priv->bands[IEEE80211_BAND_2GHZ].bitrates[rate_index];
 267 }
 268
 269 /*
 270  * Determine how many receiver/antenna chains to use.
 271  * More provides better reception via diversity.  Fewer saves power.
 272  * MIMO (dual stream) requires at least 2, but works better with 3.
 273  * This does not determine *which* chains to use, just how many.
 274  */
 275 static int iwl4965_get_rx_chain_counter(struct iwl_priv *priv,
 276                                         u8 *idle_state, u8 *rx_state)
 277 {
 278         u8 is_single = is_single_stream(priv);
 279         u8 is_cam = test_bit(STATUS_POWER_PMI, &priv->status) ? 0 : 1;
 280
 281         /* # of Rx chains to use when expecting MIMO. */
 282         if (is_single || (!is_cam && (priv->ps_mode == IWL_MIMO_PS_STATIC)))
 283                 *rx_state = 2;
 284         else
 285                 *rx_state = 3;
 286
 287         /* # Rx chains when idling and maybe trying to save power */
 288         switch (priv->ps_mode) {
 289         case IWL_MIMO_PS_STATIC:
 290         case IWL_MIMO_PS_DYNAMIC:
 291                 *idle_state = (is_cam) ? 2 : 1;
 292                 break;
 293         case IWL_MIMO_PS_NONE:
 294                 *idle_state = (is_cam) ? *rx_state : 1;
 295                 break;
 296         default:
 297                 *idle_state = 1;
 298                 break;
 299         }
 300
 301         return 0;
 302 }
 303
 304 int iwl4965_hw_rxq_stop(struct iwl_priv *priv)
 305 {
 306         int rc;
 307         unsigned long flags;
 308
 309         spin_lock_irqsave(&priv->lock, flags);
 310         rc = iwl4965_grab_nic_access(priv);
 311         if (rc) {
 312                 spin_unlock_irqrestore(&priv->lock, flags);
 313                 return rc;
 314         }
 315
 316         /* stop Rx DMA */
 317         iwl4965_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0);
 318         rc = iwl4965_poll_direct_bit(priv, FH_MEM_RSSR_RX_STATUS_REG,
 319                                      (1 << 24), 1000);
 320         if (rc < 0)
 321                 IWL_ERROR("Can't stop Rx DMA.\n");
 322
 323         iwl4965_release_nic_access(priv);
 324         spin_unlock_irqrestore(&priv->lock, flags);
 325
 326         return 0;
 327 }
 328
 329 u8 iwl4965_hw_find_station(struct iwl_priv *priv, const u8 *addr)
 330 {
 331         int i;
 332         int start = 0;
 333         int ret = IWL_INVALID_STATION;
 334         unsigned long flags;
 335         DECLARE_MAC_BUF(mac);
 336
 337         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) ||
 338             (priv->iw_mode == IEEE80211_IF_TYPE_AP))
 339                 start = IWL_STA_ID;
 340
 341         if (is_broadcast_ether_addr(addr))
 342                 return priv->hw_setting.bcast_sta_id;
 343
 344         spin_lock_irqsave(&priv->sta_lock, flags);
 345         for (i = start; i < priv->hw_setting.max_stations; i++)
 346                 if ((priv->stations[i].used) &&
 347                     (!compare_ether_addr
 348                      (priv->stations[i].sta.sta.addr, addr))) {
 349                         ret = i;
 350                         goto out;
 351                 }
 352
 353         IWL_DEBUG_ASSOC_LIMIT("can not find STA %s total %d\n",
 354                         print_mac(mac, addr), priv->num_stations);
 355
 356  out:
 357         spin_unlock_irqrestore(&priv->sta_lock, flags);
 358         return ret;
 359 }
 360
 361 static int iwl4965_nic_set_pwr_src(struct iwl_priv *priv, int pwr_max)
 362 {
 363         int ret;
 364         unsigned long flags;
 365
 366         spin_lock_irqsave(&priv->lock, flags);
 367         ret = iwl4965_grab_nic_access(priv);
 368         if (ret) {
 369                 spin_unlock_irqrestore(&priv->lock, flags);
 370                 return ret;
 371         }
 372
 373         if (!pwr_max) {
 374                 u32 val;
 375
 376                 ret = pci_read_config_dword(priv->pci_dev, PCI_POWER_SOURCE,
 377                                            &val);
 378
 379                 if (val & PCI_CFG_PMC_PME_FROM_D3COLD_SUPPORT)
 380                         iwl4965_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 381                                 APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
 382                                 ~APMG_PS_CTRL_MSK_PWR_SRC);
 383         } else
 384                 iwl4965_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 385                         APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
 386                         ~APMG_PS_CTRL_MSK_PWR_SRC);
 387
 388         iwl4965_release_nic_access(priv);
 389         spin_unlock_irqrestore(&priv->lock, flags);
 390
 391         return ret;
 392 }
 393
 394 static int iwl4965_rx_init(struct iwl_priv *priv, struct iwl4965_rx_queue *rxq)
 395 {
 396         int rc;
 397         unsigned long flags;
 398         unsigned int rb_size;
 399
 400         spin_lock_irqsave(&priv->lock, flags);
 401         rc = iwl4965_grab_nic_access(priv);
 402         if (rc) {
 403                 spin_unlock_irqrestore(&priv->lock, flags);
 404                 return rc;
 405         }
 406
 407         if (iwl4965_mod_params.amsdu_size_8K)
 408                 rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_8K;
 409         else
 410                 rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K;
 411
 412         /* Stop Rx DMA */
 413         iwl4965_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0);
 414
 415         /* Reset driver's Rx queue write index */
 416         iwl4965_write_direct32(priv, FH_RSCSR_CHNL0_RBDCB_WPTR_REG, 0);
 417
 418         /* Tell device where to find RBD circular buffer in DRAM */
 419         iwl4965_write_direct32(priv, FH_RSCSR_CHNL0_RBDCB_BASE_REG,
 420                              rxq->dma_addr >> 8);
 421
 422         /* Tell device where in DRAM to update its Rx status */
 423         iwl4965_write_direct32(priv, FH_RSCSR_CHNL0_STTS_WPTR_REG,
 424                              (priv->hw_setting.shared_phys +
 425                               offsetof(struct iwl4965_shared, val0)) >> 4);
 426
 427         /* Enable Rx DMA, enable host interrupt, Rx buffer size 4k, 256 RBDs */
 428         iwl4965_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG,
 429                              FH_RCSR_RX_CONFIG_CHNL_EN_ENABLE_VAL |
 430                              FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_INT_HOST_VAL |
 431                              rb_size |
 432                              /*0x10 << 4 | */
 433                              (RX_QUEUE_SIZE_LOG <<
 434                               FH_RCSR_RX_CONFIG_RBDCB_SIZE_BITSHIFT));
 435
 436         /*
 437          * iwl4965_write32(priv,CSR_INT_COAL_REG,0);
 438          */
 439
 440         iwl4965_release_nic_access(priv);
 441         spin_unlock_irqrestore(&priv->lock, flags);
 442
 443         return 0;
 444 }
 445
 446 /* Tell 4965 where to find the "keep warm" buffer */
 447 static int iwl4965_kw_init(struct iwl_priv *priv)
 448 {
 449         unsigned long flags;
 450         int rc;
 451
 452         spin_lock_irqsave(&priv->lock, flags);
 453         rc = iwl4965_grab_nic_access(priv);
 454         if (rc)
 455                 goto out;
 456
 457         iwl4965_write_direct32(priv, IWL_FH_KW_MEM_ADDR_REG,
 458                              priv->kw.dma_addr >> 4);
 459         iwl4965_release_nic_access(priv);
 460 out:
 461         spin_unlock_irqrestore(&priv->lock, flags);
 462         return rc;
 463 }
 464
 465 static int iwl4965_kw_alloc(struct iwl_priv *priv)
 466 {
 467         struct pci_dev *dev = priv->pci_dev;
 468         struct iwl4965_kw *kw = &priv->kw;
 469
 470         kw->size = IWL4965_KW_SIZE;     /* TBW need set somewhere else */
 471         kw->v_addr = pci_alloc_consistent(dev, kw->size, &kw->dma_addr);
 472         if (!kw->v_addr)
 473                 return -ENOMEM;
 474
 475         return 0;
 476 }
 477
 478 /**
 479  * iwl4965_kw_free - Free the "keep warm" buffer
 480  */
 481 static void iwl4965_kw_free(struct iwl_priv *priv)
 482 {
 483         struct pci_dev *dev = priv->pci_dev;
 484         struct iwl4965_kw *kw = &priv->kw;
 485
 486         if (kw->v_addr) {
 487                 pci_free_consistent(dev, kw->size, kw->v_addr, kw->dma_addr);
 488                 memset(kw, 0, sizeof(*kw));
 489         }
 490 }
 491
 492 /**
 493  * iwl4965_txq_ctx_reset - Reset TX queue context
 494  * Destroys all DMA structures and initialise them again
 495  *
 496  * @param priv
 497  * @return error code
 498  */
 499 static int iwl4965_txq_ctx_reset(struct iwl_priv *priv)
 500 {
 501         int rc = 0;
 502         int txq_id, slots_num;
 503         unsigned long flags;
 504
 505         iwl4965_kw_free(priv);
 506
 507         /* Free all tx/cmd queues and keep-warm buffer */
 508         iwl4965_hw_txq_ctx_free(priv);
 509
 510         /* Alloc keep-warm buffer */
 511         rc = iwl4965_kw_alloc(priv);
 512         if (rc) {
 513                 IWL_ERROR("Keep Warm allocation failed");
 514                 goto error_kw;
 515         }
 516
 517         spin_lock_irqsave(&priv->lock, flags);
 518
 519         rc = iwl4965_grab_nic_access(priv);
 520         if (unlikely(rc)) {
 521                 IWL_ERROR("TX reset failed");
 522                 spin_unlock_irqrestore(&priv->lock, flags);
 523                 goto error_reset;
 524         }
 525
 526         /* Turn off all Tx DMA channels */
 527         iwl4965_write_prph(priv, KDR_SCD_TXFACT, 0);
 528         iwl4965_release_nic_access(priv);
 529         spin_unlock_irqrestore(&priv->lock, flags);
 530
 531         /* Tell 4965 where to find the keep-warm buffer */
 532         rc = iwl4965_kw_init(priv);
 533         if (rc) {
 534                 IWL_ERROR("kw_init failed\n");
 535                 goto error_reset;
 536         }
 537
 538         /* Alloc and init all (default 16) Tx queues,
 539          * including the command queue (#4) */
 540         for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++) {
 541                 slots_num = (txq_id == IWL_CMD_QUEUE_NUM) ?
 542                                         TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS;
 543                 rc = iwl4965_tx_queue_init(priv, &priv->txq[txq_id], slots_num,
 544                                        txq_id);
 545                 if (rc) {
 546                         IWL_ERROR("Tx %d queue init failed\n", txq_id);
 547                         goto error;
 548                 }
 549         }
 550
 551         return rc;
 552
 553  error:
 554         iwl4965_hw_txq_ctx_free(priv);
 555  error_reset:
 556         iwl4965_kw_free(priv);
 557  error_kw:
 558         return rc;
 559 }
 560
 561 int iwl4965_hw_nic_init(struct iwl_priv *priv)
 562 {
 563         int rc;
 564         unsigned long flags;
 565         struct iwl4965_rx_queue *rxq = &priv->rxq;
 566         u8 rev_id;
 567         u32 val;
 568         u8 val_link;
 569
 570         iwl4965_power_init_handle(priv);
 571
 572         /* nic_init */
 573         spin_lock_irqsave(&priv->lock, flags);
 574
 575         iwl4965_set_bit(priv, CSR_GIO_CHICKEN_BITS,
 576                     CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
 577
 578         iwl4965_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 579         rc = iwl4965_poll_bit(priv, CSR_GP_CNTRL,
 580                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
 581                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
 582         if (rc < 0) {
 583                 spin_unlock_irqrestore(&priv->lock, flags);
 584                 IWL_DEBUG_INFO("Failed to init the card\n");
 585                 return rc;
 586         }
 587
 588         rc = iwl4965_grab_nic_access(priv);
 589         if (rc) {
 590                 spin_unlock_irqrestore(&priv->lock, flags);
 591                 return rc;
 592         }
 593
 594         iwl4965_read_prph(priv, APMG_CLK_CTRL_REG);
 595
 596         iwl4965_write_prph(priv, APMG_CLK_CTRL_REG,
 597                                  APMG_CLK_VAL_DMA_CLK_RQT |
 598                                  APMG_CLK_VAL_BSM_CLK_RQT);
 599         iwl4965_read_prph(priv, APMG_CLK_CTRL_REG);
 600
 601         udelay(20);
 602
 603         iwl4965_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
 604                                     APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
 605
 606         iwl4965_release_nic_access(priv);
 607         iwl4965_write32(priv, CSR_INT_COALESCING, 512 / 32);
 608         spin_unlock_irqrestore(&priv->lock, flags);
 609
 610         /* Determine HW type */
 611         rc = pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &rev_id);
 612         if (rc)
 613                 return rc;
 614
 615         IWL_DEBUG_INFO("HW Revision ID = 0x%X\n", rev_id);
 616
 617         iwl4965_nic_set_pwr_src(priv, 1);
 618         spin_lock_irqsave(&priv->lock, flags);
 619
 620         if ((rev_id & 0x80) == 0x80 && (rev_id & 0x7f) < 8) {
 621                 pci_read_config_dword(priv->pci_dev, PCI_REG_WUM8, &val);
 622                 /* Enable No Snoop field */
 623                 pci_write_config_dword(priv->pci_dev, PCI_REG_WUM8,
 624                                        val & ~(1 << 11));
 625         }
 626
 627         spin_unlock_irqrestore(&priv->lock, flags);
 628
 629         if (priv->eeprom.calib_version < EEPROM_TX_POWER_VERSION_NEW) {
 630                 IWL_ERROR("Older EEPROM detected!  Aborting.\n");
 631                 return -EINVAL;
 632         }
 633
 634         pci_read_config_byte(priv->pci_dev, PCI_LINK_CTRL, &val_link);
 635
 636         /* disable L1 entry -- workaround for pre-B1 */
 637         pci_write_config_byte(priv->pci_dev, PCI_LINK_CTRL, val_link & ~0x02);
 638
 639         spin_lock_irqsave(&priv->lock, flags);
 640
 641         /* set CSR_HW_CONFIG_REG for uCode use */
 642
 643         iwl4965_set_bit(priv, CSR_HW_IF_CONFIG_REG,
 644                         CSR49_HW_IF_CONFIG_REG_BIT_4965_R |
 645                         CSR49_HW_IF_CONFIG_REG_BIT_RADIO_SI |
 646                         CSR49_HW_IF_CONFIG_REG_BIT_MAC_SI);
 647
 648         rc = iwl4965_grab_nic_access(priv);
 649         if (rc < 0) {
 650                 spin_unlock_irqrestore(&priv->lock, flags);
 651                 IWL_DEBUG_INFO("Failed to init the card\n");
 652                 return rc;
 653         }
 654
 655         iwl4965_read_prph(priv, APMG_PS_CTRL_REG);
 656         iwl4965_set_bits_prph(priv, APMG_PS_CTRL_REG,
 657                                     APMG_PS_CTRL_VAL_RESET_REQ);
 658         udelay(5);
 659         iwl4965_clear_bits_prph(priv, APMG_PS_CTRL_REG,
 660                                       APMG_PS_CTRL_VAL_RESET_REQ);
 661
 662         iwl4965_release_nic_access(priv);
 663         spin_unlock_irqrestore(&priv->lock, flags);
 664
 665         iwl4965_hw_card_show_info(priv);
 666
 667         /* end nic_init */
 668
 669         /* Allocate the RX queue, or reset if it is already allocated */
 670         if (!rxq->bd) {
 671                 rc = iwl4965_rx_queue_alloc(priv);
 672                 if (rc) {
 673                         IWL_ERROR("Unable to initialize Rx queue\n");
 674                         return -ENOMEM;
 675                 }
 676         } else
 677                 iwl4965_rx_queue_reset(priv, rxq);
 678
 679         iwl4965_rx_replenish(priv);
 680
 681         iwl4965_rx_init(priv, rxq);
 682
 683         spin_lock_irqsave(&priv->lock, flags);
 684
 685         rxq->need_update = 1;
 686         iwl4965_rx_queue_update_write_ptr(priv, rxq);
 687
 688         spin_unlock_irqrestore(&priv->lock, flags);
 689
 690         /* Allocate and init all Tx and Command queues */
 691         rc = iwl4965_txq_ctx_reset(priv);
 692         if (rc)
 693                 return rc;
 694
 695         if (priv->eeprom.sku_cap & EEPROM_SKU_CAP_SW_RF_KILL_ENABLE)
 696                 IWL_DEBUG_RF_KILL("SW RF KILL supported in EEPROM.\n");
 697
 698         if (priv->eeprom.sku_cap & EEPROM_SKU_CAP_HW_RF_KILL_ENABLE)
 699                 IWL_DEBUG_RF_KILL("HW RF KILL supported in EEPROM.\n");
 700
 701         set_bit(STATUS_INIT, &priv->status);
 702
 703         return 0;
 704 }
 705
 706 int iwl4965_hw_nic_stop_master(struct iwl_priv *priv)
 707 {
 708         int rc = 0;
 709         u32 reg_val;
 710         unsigned long flags;
 711
 712         spin_lock_irqsave(&priv->lock, flags);
 713
 714         /* set stop master bit */
 715         iwl4965_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
 716
 717         reg_val = iwl4965_read32(priv, CSR_GP_CNTRL);
 718
 719         if (CSR_GP_CNTRL_REG_FLAG_MAC_POWER_SAVE ==
 720             (reg_val & CSR_GP_CNTRL_REG_MSK_POWER_SAVE_TYPE))
 721                 IWL_DEBUG_INFO("Card in power save, master is already "
 722                                "stopped\n");
 723         else {
 724                 rc = iwl4965_poll_bit(priv, CSR_RESET,
 725                                   CSR_RESET_REG_FLAG_MASTER_DISABLED,
 726                                   CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
 727                 if (rc < 0) {
 728                         spin_unlock_irqrestore(&priv->lock, flags);
 729                         return rc;
 730                 }
 731         }
 732
 733         spin_unlock_irqrestore(&priv->lock, flags);
 734         IWL_DEBUG_INFO("stop master\n");
 735
 736         return rc;
 737 }
 738
 739 /**
 740  * iwl4965_hw_txq_ctx_stop - Stop all Tx DMA channels, free Tx queue memory
 741  */
 742 void iwl4965_hw_txq_ctx_stop(struct iwl_priv *priv)
 743 {
 744
 745         int txq_id;
 746         unsigned long flags;
 747
 748         /* Stop each Tx DMA channel, and wait for it to be idle */
 749         for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++) {
 750                 spin_lock_irqsave(&priv->lock, flags);
 751                 if (iwl4965_grab_nic_access(priv)) {
 752                         spin_unlock_irqrestore(&priv->lock, flags);
 753                         continue;
 754                 }
 755
 756                 iwl4965_write_direct32(priv,
 757                                      IWL_FH_TCSR_CHNL_TX_CONFIG_REG(txq_id),
 758                                      0x0);
 759                 iwl4965_poll_direct_bit(priv, IWL_FH_TSSR_TX_STATUS_REG,
 760                                         IWL_FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE
 761                                         (txq_id), 200);
 762                 iwl4965_release_nic_access(priv);
 763                 spin_unlock_irqrestore(&priv->lock, flags);
 764         }
 765
 766         /* Deallocate memory for all Tx queues */
 767         iwl4965_hw_txq_ctx_free(priv);
 768 }
 769
 770 int iwl4965_hw_nic_reset(struct iwl_priv *priv)
 771 {
 772         int rc = 0;
 773         unsigned long flags;
 774
 775         iwl4965_hw_nic_stop_master(priv);
 776
 777         spin_lock_irqsave(&priv->lock, flags);
 778
 779         iwl4965_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
 780
 781         udelay(10);
 782
 783         iwl4965_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 784         rc = iwl4965_poll_bit(priv, CSR_RESET,
 785                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
 786                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25);
 787
 788         udelay(10);
 789
 790         rc = iwl4965_grab_nic_access(priv);
 791         if (!rc) {
 792                 iwl4965_write_prph(priv, APMG_CLK_EN_REG,
 793                                          APMG_CLK_VAL_DMA_CLK_RQT |
 794                                          APMG_CLK_VAL_BSM_CLK_RQT);
 795
 796                 udelay(10);
 797
 798                 iwl4965_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
 799                                 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
 800
 801                 iwl4965_release_nic_access(priv);
 802         }
 803
 804         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
 805         wake_up_interruptible(&priv->wait_command_queue);
 806
 807         spin_unlock_irqrestore(&priv->lock, flags);
 808
 809         return rc;
 810
 811 }
 812
 813 #define REG_RECALIB_PERIOD (60)
 814
 815 /**
 816  * iwl4965_bg_statistics_periodic - Timer callback to queue statistics
 817  *
 818  * This callback is provided in order to queue the statistics_work
 819  * in work_queue context (v. softirq)
 820  *
 821  * This timer function is continually reset to execute within
 822  * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
 823  * was received.  We need to ensure we receive the statistics in order
 824  * to update the temperature used for calibrating the TXPOWER.  However,
 825  * we can't send the statistics command from softirq context (which
 826  * is the context which timers run at) so we have to queue off the
 827  * statistics_work to actually send the command to the hardware.
 828  */
 829 static void iwl4965_bg_statistics_periodic(unsigned long data)
 830 {
 831         struct iwl_priv *priv = (struct iwl_priv *)data;
 832
 833         queue_work(priv->workqueue, &priv->statistics_work);
 834 }
 835
 836 /**
 837  * iwl4965_bg_statistics_work - Send the statistics request to the hardware.
 838  *
 839  * This is queued by iwl4965_bg_statistics_periodic.
 840  */
 841 static void iwl4965_bg_statistics_work(struct work_struct *work)
 842 {
 843         struct iwl_priv *priv = container_of(work, struct iwl_priv,
 844                                              statistics_work);
 845
 846         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 847                 return;
 848
 849         mutex_lock(&priv->mutex);
 850         iwl4965_send_statistics_request(priv);
 851         mutex_unlock(&priv->mutex);
 852 }
 853
 854 #define CT_LIMIT_CONST          259
 855 #define TM_CT_KILL_THRESHOLD    110
 856
 857 void iwl4965_rf_kill_ct_config(struct iwl_priv *priv)
 858 {
 859         struct iwl4965_ct_kill_config cmd;
 860         u32 R1, R2, R3;
 861         u32 temp_th;
 862         u32 crit_temperature;
 863         unsigned long flags;
 864         int rc = 0;
 865
 866         spin_lock_irqsave(&priv->lock, flags);
 867         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_CLR,
 868                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
 869         spin_unlock_irqrestore(&priv->lock, flags);
 870
 871         if (priv->statistics.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK) {
 872                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[1]);
 873                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[1]);
 874                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[1]);
 875         } else {
 876                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[0]);
 877                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[0]);
 878                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[0]);
 879         }
 880
 881         temp_th = CELSIUS_TO_KELVIN(TM_CT_KILL_THRESHOLD);
 882
 883         crit_temperature = ((temp_th * (R3-R1))/CT_LIMIT_CONST) + R2;
 884         cmd.critical_temperature_R =  cpu_to_le32(crit_temperature);
 885         rc = iwl4965_send_cmd_pdu(priv,
 886                               REPLY_CT_KILL_CONFIG_CMD, sizeof(cmd), &cmd);
 887         if (rc)
 888                 IWL_ERROR("REPLY_CT_KILL_CONFIG_CMD failed\n");
 889         else
 890                 IWL_DEBUG_INFO("REPLY_CT_KILL_CONFIG_CMD succeeded\n");
 891 }
 892
 893 #ifdef CONFIG_IWL4965_SENSITIVITY
 894
 895 /* "false alarms" are signals that our DSP tries to lock onto,
 896  *   but then determines that they are either noise, or transmissions
 897  *   from a distant wireless network (also "noise", really) that get
 898  *   "stepped on" by stronger transmissions within our own network.
 899  * This algorithm attempts to set a sensitivity level that is high
 900  *   enough to receive all of our own network traffic, but not so
 901  *   high that our DSP gets too busy trying to lock onto non-network
 902  *   activity/noise. */
 903 static int iwl4965_sens_energy_cck(struct iwl_priv *priv,
 904                                    u32 norm_fa,
 905                                    u32 rx_enable_time,
 906                                    struct statistics_general_data *rx_info)
 907 {
 908         u32 max_nrg_cck = 0;
 909         int i = 0;
 910         u8 max_silence_rssi = 0;
 911         u32 silence_ref = 0;
 912         u8 silence_rssi_a = 0;
 913         u8 silence_rssi_b = 0;
 914         u8 silence_rssi_c = 0;
 915         u32 val;
 916
 917         /* "false_alarms" values below are cross-multiplications to assess the
 918          *   numbers of false alarms within the measured period of actual Rx
 919          *   (Rx is off when we're txing), vs the min/max expected false alarms
 920          *   (some should be expected if rx is sensitive enough) in a
 921          *   hypothetical listening period of 200 time units (TU), 204.8 msec:
 922          *
 923          * MIN_FA/fixed-time < false_alarms/actual-rx-time < MAX_FA/beacon-time
 924          *
 925          * */
 926         u32 false_alarms = norm_fa * 200 * 1024;
 927         u32 max_false_alarms = MAX_FA_CCK * rx_enable_time;
 928         u32 min_false_alarms = MIN_FA_CCK * rx_enable_time;
 929         struct iwl4965_sensitivity_data *data = NULL;
 930
 931         data = &(priv->sensitivity_data);
 932
 933         data->nrg_auto_corr_silence_diff = 0;
 934
 935         /* Find max silence rssi among all 3 receivers.
 936          * This is background noise, which may include transmissions from other
 937          *    networks, measured during silence before our network's beacon */
 938         silence_rssi_a = (u8)((rx_info->beacon_silence_rssi_a &
 939                             ALL_BAND_FILTER) >> 8);
 940         silence_rssi_b = (u8)((rx_info->beacon_silence_rssi_b &
 941                             ALL_BAND_FILTER) >> 8);
 942         silence_rssi_c = (u8)((rx_info->beacon_silence_rssi_c &
 943                             ALL_BAND_FILTER) >> 8);
 944
 945         val = max(silence_rssi_b, silence_rssi_c);
 946         max_silence_rssi = max(silence_rssi_a, (u8) val);
 947
 948         /* Store silence rssi in 20-beacon history table */
 949         data->nrg_silence_rssi[data->nrg_silence_idx] = max_silence_rssi;
 950         data->nrg_silence_idx++;
 951         if (data->nrg_silence_idx >= NRG_NUM_PREV_STAT_L)
 952                 data->nrg_silence_idx = 0;
 953
 954         /* Find max silence rssi across 20 beacon history */
 955         for (i = 0; i < NRG_NUM_PREV_STAT_L; i++) {
 956                 val = data->nrg_silence_rssi[i];
 957                 silence_ref = max(silence_ref, val);
 958         }
 959         IWL_DEBUG_CALIB("silence a %u, b %u, c %u, 20-bcn max %u\n",
 960                         silence_rssi_a, silence_rssi_b, silence_rssi_c,
 961                         silence_ref);
 962
 963         /* Find max rx energy (min value!) among all 3 receivers,
 964          *   measured during beacon frame.
 965          * Save it in 10-beacon history table. */
 966         i = data->nrg_energy_idx;
 967         val = min(rx_info->beacon_energy_b, rx_info->beacon_energy_c);
 968         data->nrg_value[i] = min(rx_info->beacon_energy_a, val);
 969
 970         data->nrg_energy_idx++;
 971         if (data->nrg_energy_idx >= 10)
 972                 data->nrg_energy_idx = 0;
 973
 974         /* Find min rx energy (max value) across 10 beacon history.
 975          * This is the minimum signal level that we want to receive well.
 976          * Add backoff (margin so we don't miss slightly lower energy frames).
 977          * This establishes an upper bound (min value) for energy threshold. */
 978         max_nrg_cck = data->nrg_value[0];
 979         for (i = 1; i < 10; i++)
 980                 max_nrg_cck = (u32) max(max_nrg_cck, (data->nrg_value[i]));
 981         max_nrg_cck += 6;
 982
 983         IWL_DEBUG_CALIB("rx energy a %u, b %u, c %u, 10-bcn max/min %u\n",
 984                         rx_info->beacon_energy_a, rx_info->beacon_energy_b,
 985                         rx_info->beacon_energy_c, max_nrg_cck - 6);
 986
 987         /* Count number of consecutive beacons with fewer-than-desired
 988          *   false alarms. */
 989         if (false_alarms < min_false_alarms)
 990                 data->num_in_cck_no_fa++;
 991         else
 992                 data->num_in_cck_no_fa = 0;
 993         IWL_DEBUG_CALIB("consecutive bcns with few false alarms = %u\n",
 994                         data->num_in_cck_no_fa);
 995
 996         /* If we got too many false alarms this time, reduce sensitivity */
 997         if (false_alarms > max_false_alarms) {
 998                 IWL_DEBUG_CALIB("norm FA %u > max FA %u\n",
 999                              false_alarms, max_false_alarms);
1000                 IWL_DEBUG_CALIB("... reducing sensitivity\n");
1001                 data->nrg_curr_state = IWL_FA_TOO_MANY;
1002
1003                 if (data->auto_corr_cck > AUTO_CORR_MAX_TH_CCK) {
1004                         /* Store for "fewer than desired" on later beacon */
1005                         data->nrg_silence_ref = silence_ref;
1006
1007                         /* increase energy threshold (reduce nrg value)
1008                          *   to decrease sensitivity */
1009                         if (data->nrg_th_cck > (NRG_MAX_CCK + NRG_STEP_CCK))
1010                                 data->nrg_th_cck = data->nrg_th_cck
1011                                                          - NRG_STEP_CCK;
1012                 }
1013
1014                 /* increase auto_corr values to decrease sensitivity */
1015                 if (data->auto_corr_cck < AUTO_CORR_MAX_TH_CCK)
1016                         data->auto_corr_cck = AUTO_CORR_MAX_TH_CCK + 1;
1017                 else {
1018                         val = data->auto_corr_cck + AUTO_CORR_STEP_CCK;
1019                         data->auto_corr_cck = min((u32)AUTO_CORR_MAX_CCK, val);
1020                 }
1021                 val = data->auto_corr_cck_mrc + AUTO_CORR_STEP_CCK;
1022                 data->auto_corr_cck_mrc = min((u32)AUTO_CORR_MAX_CCK_MRC, val);
1023
1024         /* Else if we got fewer than desired, increase sensitivity */
1025         } else if (false_alarms < min_false_alarms) {
1026                 data->nrg_curr_state = IWL_FA_TOO_FEW;
1027
1028                 /* Compare silence level with silence level for most recent
1029                  *   healthy number or too many false alarms */
1030                 data->nrg_auto_corr_silence_diff = (s32)data->nrg_silence_ref -
1031                                                    (s32)silence_ref;
1032
1033                 IWL_DEBUG_CALIB("norm FA %u < min FA %u, silence diff %d\n",
1034                          false_alarms, min_false_alarms,
1035                          data->nrg_auto_corr_silence_diff);
1036
1037                 /* Increase value to increase sensitivity, but only if:
1038                  * 1a) previous beacon did *not* have *too many* false alarms
1039                  * 1b) AND there's a significant difference in Rx levels
1040                  *      from a previous beacon with too many, or healthy # FAs
1041                  * OR 2) We've seen a lot of beacons (100) with too few
1042                  *       false alarms */
1043                 if ((data->nrg_prev_state != IWL_FA_TOO_MANY) &&
1044                         ((data->nrg_auto_corr_silence_diff > NRG_DIFF) ||
1045                         (data->num_in_cck_no_fa > MAX_NUMBER_CCK_NO_FA))) {
1046
1047                         IWL_DEBUG_CALIB("... increasing sensitivity\n");
1048                         /* Increase nrg value to increase sensitivity */
1049                         val = data->nrg_th_cck + NRG_STEP_CCK;
1050                         data->nrg_th_cck = min((u32)NRG_MIN_CCK, val);
1051
1052                         /* Decrease auto_corr values to increase sensitivity */
1053                         val = data->auto_corr_cck - AUTO_CORR_STEP_CCK;
1054                         data->auto_corr_cck = max((u32)AUTO_CORR_MIN_CCK, val);
1055
1056                         val = data->auto_corr_cck_mrc - AUTO_CORR_STEP_CCK;
1057                         data->auto_corr_cck_mrc =
1058                                          max((u32)AUTO_CORR_MIN_CCK_MRC, val);
1059
1060                 } else
1061                         IWL_DEBUG_CALIB("... but not changing sensitivity\n");
1062
1063         /* Else we got a healthy number of false alarms, keep status quo */
1064         } else {
1065                 IWL_DEBUG_CALIB(" FA in safe zone\n");
1066                 data->nrg_curr_state = IWL_FA_GOOD_RANGE;
1067
1068                 /* Store for use in "fewer than desired" with later beacon */
1069                 data->nrg_silence_ref = silence_ref;
1070
1071                 /* If previous beacon had too many false alarms,
1072                  *   give it some extra margin by reducing sensitivity again
1073                  *   (but don't go below measured energy of desired Rx) */
1074                 if (IWL_FA_TOO_MANY == data->nrg_prev_state) {
1075                         IWL_DEBUG_CALIB("... increasing margin\n");
1076                         data->nrg_th_cck -= NRG_MARGIN;
1077                 }
1078         }
1079
1080         /* Make sure the energy threshold does not go above the measured
1081          * energy of the desired Rx signals (reduced by backoff margin),
1082          * or else we might start missing Rx frames.
1083          * Lower value is higher energy, so we use max()!
1084          */
1085         data->nrg_th_cck = max(max_nrg_cck, data->nrg_th_cck);
1086         IWL_DEBUG_CALIB("new nrg_th_cck %u\n", data->nrg_th_cck);
1087
1088         data->nrg_prev_state = data->nrg_curr_state;
1089
1090         return 0;
1091 }
1092
1093
1094 static int iwl4965_sens_auto_corr_ofdm(struct iwl_priv *priv,
1095                                        u32 norm_fa,
1096                                        u32 rx_enable_time)
1097 {
1098         u32 val;
1099         u32 false_alarms = norm_fa * 200 * 1024;
1100         u32 max_false_alarms = MAX_FA_OFDM * rx_enable_time;
1101         u32 min_false_alarms = MIN_FA_OFDM * rx_enable_time;
1102         struct iwl4965_sensitivity_data *data = NULL;
1103
1104         data = &(priv->sensitivity_data);
1105
1106         /* If we got too many false alarms this time, reduce sensitivity */
1107         if (false_alarms > max_false_alarms) {
1108
1109                 IWL_DEBUG_CALIB("norm FA %u > max FA %u)\n",
1110                              false_alarms, max_false_alarms);
1111
1112                 val = data->auto_corr_ofdm + AUTO_CORR_STEP_OFDM;
1113                 data->auto_corr_ofdm =
1114                                 min((u32)AUTO_CORR_MAX_OFDM, val);
1115
1116                 val = data->auto_corr_ofdm_mrc + AUTO_CORR_STEP_OFDM;
1117                 data->auto_corr_ofdm_mrc =
1118                                 min((u32)AUTO_CORR_MAX_OFDM_MRC, val);
1119
1120                 val = data->auto_corr_ofdm_x1 + AUTO_CORR_STEP_OFDM;
1121                 data->auto_corr_ofdm_x1 =
1122                                 min((u32)AUTO_CORR_MAX_OFDM_X1, val);
1123
1124                 val = data->auto_corr_ofdm_mrc_x1 + AUTO_CORR_STEP_OFDM;
1125                 data->auto_corr_ofdm_mrc_x1 =
1126                                 min((u32)AUTO_CORR_MAX_OFDM_MRC_X1, val);
1127         }
1128
1129         /* Else if we got fewer than desired, increase sensitivity */
1130         else if (false_alarms < min_false_alarms) {
1131
1132                 IWL_DEBUG_CALIB("norm FA %u < min FA %u\n",
1133                              false_alarms, min_false_alarms);
1134
1135                 val = data->auto_corr_ofdm - AUTO_CORR_STEP_OFDM;
1136                 data->auto_corr_ofdm =
1137                                 max((u32)AUTO_CORR_MIN_OFDM, val);
1138
1139                 val = data->auto_corr_ofdm_mrc - AUTO_CORR_STEP_OFDM;
1140                 data->auto_corr_ofdm_mrc =
1141                                 max((u32)AUTO_CORR_MIN_OFDM_MRC, val);
1142
1143                 val = data->auto_corr_ofdm_x1 - AUTO_CORR_STEP_OFDM;
1144                 data->auto_corr_ofdm_x1 =
1145                                 max((u32)AUTO_CORR_MIN_OFDM_X1, val);
1146
1147                 val = data->auto_corr_ofdm_mrc_x1 - AUTO_CORR_STEP_OFDM;
1148                 data->auto_corr_ofdm_mrc_x1 =
1149                                 max((u32)AUTO_CORR_MIN_OFDM_MRC_X1, val);
1150         }
1151
1152         else
1153                 IWL_DEBUG_CALIB("min FA %u < norm FA %u < max FA %u OK\n",
1154                          min_false_alarms, false_alarms, max_false_alarms);
1155
1156         return 0;
1157 }
1158
1159 static int iwl4965_sensitivity_callback(struct iwl_priv *priv,
1160                                     struct iwl4965_cmd *cmd, struct sk_buff *skb)
1161 {
1162         /* We didn't cache the SKB; let the caller free it */
1163         return 1;
1164 }
1165
1166 /* Prepare a SENSITIVITY_CMD, send to uCode if values have changed */
1167 static int iwl4965_sensitivity_write(struct iwl_priv *priv, u8 flags)
1168 {
1169         int rc = 0;
1170         struct iwl4965_sensitivity_cmd cmd ;
1171         struct iwl4965_sensitivity_data *data = NULL;
1172         struct iwl4965_host_cmd cmd_out = {
1173                 .id = SENSITIVITY_CMD,
1174                 .len = sizeof(struct iwl4965_sensitivity_cmd),
1175                 .meta.flags = flags,
1176                 .data = &cmd,
1177         };
1178
1179         data = &(priv->sensitivity_data);
1180
1181         memset(&cmd, 0, sizeof(cmd));
1182
1183         cmd.table[HD_AUTO_CORR32_X4_TH_ADD_MIN_INDEX] =
1184                                 cpu_to_le16((u16)data->auto_corr_ofdm);
1185         cmd.table[HD_AUTO_CORR32_X4_TH_ADD_MIN_MRC_INDEX] =
1186                                 cpu_to_le16((u16)data->auto_corr_ofdm_mrc);
1187         cmd.table[HD_AUTO_CORR32_X1_TH_ADD_MIN_INDEX] =
1188                                 cpu_to_le16((u16)data->auto_corr_ofdm_x1);
1189         cmd.table[HD_AUTO_CORR32_X1_TH_ADD_MIN_MRC_INDEX] =
1190                                 cpu_to_le16((u16)data->auto_corr_ofdm_mrc_x1);
1191
1192         cmd.table[HD_AUTO_CORR40_X4_TH_ADD_MIN_INDEX] =
1193                                 cpu_to_le16((u16)data->auto_corr_cck);
1194         cmd.table[HD_AUTO_CORR40_X4_TH_ADD_MIN_MRC_INDEX] =
1195                                 cpu_to_le16((u16)data->auto_corr_cck_mrc);
1196
1197         cmd.table[HD_MIN_ENERGY_CCK_DET_INDEX] =
1198                                 cpu_to_le16((u16)data->nrg_th_cck);
1199         cmd.table[HD_MIN_ENERGY_OFDM_DET_INDEX] =
1200                                 cpu_to_le16((u16)data->nrg_th_ofdm);
1201
1202         cmd.table[HD_BARKER_CORR_TH_ADD_MIN_INDEX] =
1203                                 __constant_cpu_to_le16(190);
1204         cmd.table[HD_BARKER_CORR_TH_ADD_MIN_MRC_INDEX] =
1205                                 __constant_cpu_to_le16(390);
1206         cmd.table[HD_OFDM_ENERGY_TH_IN_INDEX] =
1207                                 __constant_cpu_to_le16(62);
1208
1209         IWL_DEBUG_CALIB("ofdm: ac %u mrc %u x1 %u mrc_x1 %u thresh %u\n",
1210                         data->auto_corr_ofdm, data->auto_corr_ofdm_mrc,
1211                         data->auto_corr_ofdm_x1, data->auto_corr_ofdm_mrc_x1,
1212                         data->nrg_th_ofdm);
1213
1214         IWL_DEBUG_CALIB("cck: ac %u mrc %u thresh %u\n",
1215                         data->auto_corr_cck, data->auto_corr_cck_mrc,
1216                         data->nrg_th_cck);
1217
1218         /* Update uCode's "work" table, and copy it to DSP */
1219         cmd.control = SENSITIVITY_CMD_CONTROL_WORK_TABLE;
1220
1221         if (flags & CMD_ASYNC)
1222                 cmd_out.meta.u.callback = iwl4965_sensitivity_callback;
1223
1224         /* Don't send command to uCode if nothing has changed */
1225         if (!memcmp(&cmd.table[0], &(priv->sensitivity_tbl[0]),
1226                     sizeof(u16)*HD_TABLE_SIZE)) {
1227                 IWL_DEBUG_CALIB("No change in SENSITIVITY_CMD\n");
1228                 return 0;
1229         }
1230
1231         /* Copy table for comparison next time */
1232         memcpy(&(priv->sensitivity_tbl[0]), &(cmd.table[0]),
1233                sizeof(u16)*HD_TABLE_SIZE);
1234
1235         rc = iwl4965_send_cmd(priv, &cmd_out);
1236         if (!rc) {
1237                 IWL_DEBUG_CALIB("SENSITIVITY_CMD succeeded\n");
1238                 return rc;
1239         }
1240
1241         return 0;
1242 }
1243
1244 void iwl4965_init_sensitivity(struct iwl_priv *priv, u8 flags, u8 force)
1245 {
1246         int rc = 0;
1247         int i;
1248         struct iwl4965_sensitivity_data *data = NULL;
1249
1250         IWL_DEBUG_CALIB("Start iwl4965_init_sensitivity\n");
1251
1252         if (force)
1253                 memset(&(priv->sensitivity_tbl[0]), 0,
1254                         sizeof(u16)*HD_TABLE_SIZE);
1255
1256         /* Clear driver's sensitivity algo data */
1257         data = &(priv->sensitivity_data);
1258         memset(data, 0, sizeof(struct iwl4965_sensitivity_data));
1259
1260         data->num_in_cck_no_fa = 0;
1261         data->nrg_curr_state = IWL_FA_TOO_MANY;
1262         data->nrg_prev_state = IWL_FA_TOO_MANY;
1263         data->nrg_silence_ref = 0;
1264         data->nrg_silence_idx = 0;
1265         data->nrg_energy_idx = 0;
1266
1267         for (i = 0; i < 10; i++)
1268                 data->nrg_value[i] = 0;
1269
1270         for (i = 0; i < NRG_NUM_PREV_STAT_L; i++)
1271                 data->nrg_silence_rssi[i] = 0;
1272
1273         data->auto_corr_ofdm = 90;
1274         data->auto_corr_ofdm_mrc = 170;
1275         data->auto_corr_ofdm_x1  = 105;
1276         data->auto_corr_ofdm_mrc_x1 = 220;
1277         data->auto_corr_cck = AUTO_CORR_CCK_MIN_VAL_DEF;
1278         data->auto_corr_cck_mrc = 200;
1279         data->nrg_th_cck = 100;
1280         data->nrg_th_ofdm = 100;
1281
1282         data->last_bad_plcp_cnt_ofdm = 0;
1283         data->last_fa_cnt_ofdm = 0;
1284         data->last_bad_plcp_cnt_cck = 0;
1285         data->last_fa_cnt_cck = 0;
1286
1287         /* Clear prior Sensitivity command data to force send to uCode */
1288         if (force)
1289                 memset(&(priv->sensitivity_tbl[0]), 0,
1290                     sizeof(u16)*HD_TABLE_SIZE);
1291
1292         rc |= iwl4965_sensitivity_write(priv, flags);
1293         IWL_DEBUG_CALIB("<<return 0x%X\n", rc);
1294
1295         return;
1296 }
1297
1298
1299 /* Reset differential Rx gains in NIC to prepare for chain noise calibration.
1300  * Called after every association, but this runs only once!
1301  *  ... once chain noise is calibrated the first time, it's good forever.  */
1302 void iwl4965_chain_noise_reset(struct iwl_priv *priv)
1303 {
1304         struct iwl4965_chain_noise_data *data = NULL;
1305         int rc = 0;
1306
1307         data = &(priv->chain_noise_data);
1308         if ((data->state == IWL_CHAIN_NOISE_ALIVE) && iwl4965_is_associated(priv)) {
1309                 struct iwl4965_calibration_cmd cmd;
1310
1311                 memset(&cmd, 0, sizeof(cmd));
1312                 cmd.opCode = PHY_CALIBRATE_DIFF_GAIN_CMD;
1313                 cmd.diff_gain_a = 0;
1314                 cmd.diff_gain_b = 0;
1315                 cmd.diff_gain_c = 0;
1316                 rc = iwl4965_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
1317                                  sizeof(cmd), &cmd);
1318                 msleep(4);
1319                 data->state = IWL_CHAIN_NOISE_ACCUMULATE;
1320                 IWL_DEBUG_CALIB("Run chain_noise_calibrate\n");
1321         }
1322         return;
1323 }
1324
1325 /*
1326  * Accumulate 20 beacons of signal and noise statistics for each of
1327  *   3 receivers/antennas/rx-chains, then figure out:
1328  * 1)  Which antennas are connected.
1329  * 2)  Differential rx gain settings to balance the 3 receivers.
1330  */
1331 static void iwl4965_noise_calibration(struct iwl_priv *priv,
1332                                       struct iwl4965_notif_statistics *stat_resp)
1333 {
1334         struct iwl4965_chain_noise_data *data = NULL;
1335         int rc = 0;
1336
1337         u32 chain_noise_a;
1338         u32 chain_noise_b;
1339         u32 chain_noise_c;
1340         u32 chain_sig_a;
1341         u32 chain_sig_b;
1342         u32 chain_sig_c;
1343         u32 average_sig[NUM_RX_CHAINS] = {INITIALIZATION_VALUE};
1344         u32 average_noise[NUM_RX_CHAINS] = {INITIALIZATION_VALUE};
1345         u32 max_average_sig;
1346         u16 max_average_sig_antenna_i;
1347         u32 min_average_noise = MIN_AVERAGE_NOISE_MAX_VALUE;
1348         u16 min_average_noise_antenna_i = INITIALIZATION_VALUE;
1349         u16 i = 0;
1350         u16 chan_num = INITIALIZATION_VALUE;
1351         u32 band = INITIALIZATION_VALUE;
1352         u32 active_chains = 0;
1353         unsigned long flags;
1354         struct statistics_rx_non_phy *rx_info = &(stat_resp->rx.general);
1355
1356         data = &(priv->chain_noise_data);
1357
1358         /* Accumulate just the first 20 beacons after the first association,
1359          *   then we're done forever. */
1360         if (data->state != IWL_CHAIN_NOISE_ACCUMULATE) {
1361                 if (data->state == IWL_CHAIN_NOISE_ALIVE)
1362                         IWL_DEBUG_CALIB("Wait for noise calib reset\n");
1363                 return;
1364         }
1365
1366         spin_lock_irqsave(&priv->lock, flags);
1367         if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) {
1368                 IWL_DEBUG_CALIB(" << Interference data unavailable\n");
1369                 spin_unlock_irqrestore(&priv->lock, flags);
1370                 return;
1371         }
1372
1373         band = (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) ? 0 : 1;
1374         chan_num = le16_to_cpu(priv->staging_rxon.channel);
1375
1376         /* Make sure we accumulate data for just the associated channel
1377          *   (even if scanning). */
1378         if ((chan_num != (le32_to_cpu(stat_resp->flag) >> 16)) ||
1379             ((STATISTICS_REPLY_FLG_BAND_24G_MSK ==
1380              (stat_resp->flag & STATISTICS_REPLY_FLG_BAND_24G_MSK)) && band)) {
1381                 IWL_DEBUG_CALIB("Stats not from chan=%d, band=%d\n",
1382                                 chan_num, band);
1383                 spin_unlock_irqrestore(&priv->lock, flags);
1384                 return;
1385         }
1386
1387         /* Accumulate beacon statistics values across 20 beacons */
1388         chain_noise_a = le32_to_cpu(rx_info->beacon_silence_rssi_a) &
1389                                 IN_BAND_FILTER;
1390         chain_noise_b = le32_to_cpu(rx_info->beacon_silence_rssi_b) &
1391                                 IN_BAND_FILTER;
1392         chain_noise_c = le32_to_cpu(rx_info->beacon_silence_rssi_c) &
1393                                 IN_BAND_FILTER;
1394
1395         chain_sig_a = le32_to_cpu(rx_info->beacon_rssi_a) & IN_BAND_FILTER;
1396         chain_sig_b = le32_to_cpu(rx_info->beacon_rssi_b) & IN_BAND_FILTER;
1397         chain_sig_c = le32_to_cpu(rx_info->beacon_rssi_c) & IN_BAND_FILTER;
1398
1399         spin_unlock_irqrestore(&priv->lock, flags);
1400
1401         data->beacon_count++;
1402
1403         data->chain_noise_a = (chain_noise_a + data->chain_noise_a);
1404         data->chain_noise_b = (chain_noise_b + data->chain_noise_b);
1405         data->chain_noise_c = (chain_noise_c + data->chain_noise_c);
1406
1407         data->chain_signal_a = (chain_sig_a + data->chain_signal_a);
1408         data->chain_signal_b = (chain_sig_b + data->chain_signal_b);
1409         data->chain_signal_c = (chain_sig_c + data->chain_signal_c);
1410
1411         IWL_DEBUG_CALIB("chan=%d, band=%d, beacon=%d\n", chan_num, band,
1412                         data->beacon_count);
1413         IWL_DEBUG_CALIB("chain_sig: a %d b %d c %d\n",
1414                         chain_sig_a, chain_sig_b, chain_sig_c);
1415         IWL_DEBUG_CALIB("chain_noise: a %d b %d c %d\n",
1416                         chain_noise_a, chain_noise_b, chain_noise_c);
1417
1418         /* If this is the 20th beacon, determine:
1419          * 1)  Disconnected antennas (using signal strengths)
1420          * 2)  Differential gain (using silence noise) to balance receivers */
1421         if (data->beacon_count == CAL_NUM_OF_BEACONS) {
1422
1423                 /* Analyze signal for disconnected antenna */
1424                 average_sig[0] = (data->chain_signal_a) / CAL_NUM_OF_BEACONS;
1425                 average_sig[1] = (data->chain_signal_b) / CAL_NUM_OF_BEACONS;
1426                 average_sig[2] = (data->chain_signal_c) / CAL_NUM_OF_BEACONS;
1427
1428                 if (average_sig[0] >= average_sig[1]) {
1429                         max_average_sig = average_sig[0];
1430                         max_average_sig_antenna_i = 0;
1431                         active_chains = (1 << max_average_sig_antenna_i);
1432                 } else {
1433                         max_average_sig = average_sig[1];
1434                         max_average_sig_antenna_i = 1;
1435                         active_chains = (1 << max_average_sig_antenna_i);
1436                 }
1437
1438                 if (average_sig[2] >= max_average_sig) {
1439                         max_average_sig = average_sig[2];
1440                         max_average_sig_antenna_i = 2;
1441                         active_chains = (1 << max_average_sig_antenna_i);
1442                 }
1443
1444                 IWL_DEBUG_CALIB("average_sig: a %d b %d c %d\n",
1445                              average_sig[0], average_sig[1], average_sig[2]);
1446                 IWL_DEBUG_CALIB("max_average_sig = %d, antenna %d\n",
1447                              max_average_sig, max_average_sig_antenna_i);
1448
1449                 /* Compare signal strengths for all 3 receivers. */
1450                 for (i = 0; i < NUM_RX_CHAINS; i++) {
1451                         if (i != max_average_sig_antenna_i) {
1452                                 s32 rssi_delta = (max_average_sig -
1453                                                   average_sig[i]);
1454
1455                                 /* If signal is very weak, compared with
1456                                  * strongest, mark it as disconnected. */
1457                                 if (rssi_delta > MAXIMUM_ALLOWED_PATHLOSS)
1458                                         data->disconn_array[i] = 1;
1459                                 else
1460                                         active_chains |= (1 << i);
1461                         IWL_DEBUG_CALIB("i = %d  rssiDelta = %d  "
1462                                      "disconn_array[i] = %d\n",
1463                                      i, rssi_delta, data->disconn_array[i]);
1464                         }
1465                 }
1466
1467                 /*If both chains A & B are disconnected -
1468                  * connect B and leave A as is */
1469                 if (data->disconn_array[CHAIN_A] &&
1470                     data->disconn_array[CHAIN_B]) {
1471                         data->disconn_array[CHAIN_B] = 0;
1472                         active_chains |= (1 << CHAIN_B);
1473                         IWL_DEBUG_CALIB("both A & B chains are disconnected! "
1474                                      "W/A - declare B as connected\n");
1475                 }
1476
1477                 IWL_DEBUG_CALIB("active_chains (bitwise) = 0x%x\n",
1478                                 active_chains);
1479
1480                 /* Save for use within RXON, TX, SCAN commands, etc. */
1481                 priv->valid_antenna = active_chains;
1482
1483                 /* Analyze noise for rx balance */
1484                 average_noise[0] = ((data->chain_noise_a)/CAL_NUM_OF_BEACONS);
1485                 average_noise[1] = ((data->chain_noise_b)/CAL_NUM_OF_BEACONS);
1486                 average_noise[2] = ((data->chain_noise_c)/CAL_NUM_OF_BEACONS);
1487
1488                 for (i = 0; i < NUM_RX_CHAINS; i++) {
1489                         if (!(data->disconn_array[i]) &&
1490                            (average_noise[i] <= min_average_noise)) {
1491                                 /* This means that chain i is active and has
1492                                  * lower noise values so far: */
1493                                 min_average_noise = average_noise[i];
1494                                 min_average_noise_antenna_i = i;
1495                         }
1496                 }
1497
1498                 data->delta_gain_code[min_average_noise_antenna_i] = 0;
1499
1500                 IWL_DEBUG_CALIB("average_noise: a %d b %d c %d\n",
1501                                 average_noise[0], average_noise[1],
1502                                 average_noise[2]);
1503
1504                 IWL_DEBUG_CALIB("min_average_noise = %d, antenna %d\n",
1505                                 min_average_noise, min_average_noise_antenna_i);
1506
1507                 for (i = 0; i < NUM_RX_CHAINS; i++) {
1508                         s32 delta_g = 0;
1509
1510                         if (!(data->disconn_array[i]) &&
1511                             (data->delta_gain_code[i] ==
1512                              CHAIN_NOISE_DELTA_GAIN_INIT_VAL)) {
1513                                 delta_g = average_noise[i] - min_average_noise;
1514                                 data->delta_gain_code[i] = (u8)((delta_g *
1515                                                                     10) / 15);
1516                                 if (CHAIN_NOISE_MAX_DELTA_GAIN_CODE <
1517                                    data->delta_gain_code[i])
1518                                         data->delta_gain_code[i] =
1519                                           CHAIN_NOISE_MAX_DELTA_GAIN_CODE;
1520
1521                                 data->delta_gain_code[i] =
1522                                         (data->delta_gain_code[i] | (1 << 2));
1523                         } else
1524                                 data->delta_gain_code[i] = 0;
1525                 }
1526                 IWL_DEBUG_CALIB("delta_gain_codes: a %d b %d c %d\n",
1527                              data->delta_gain_code[0],
1528                              data->delta_gain_code[1],
1529                              data->delta_gain_code[2]);
1530
1531                 /* Differential gain gets sent to uCode only once */
1532                 if (!data->radio_write) {
1533                         struct iwl4965_calibration_cmd cmd;
1534                         data->radio_write = 1;
1535
1536                         memset(&cmd, 0, sizeof(cmd));
1537                         cmd.opCode = PHY_CALIBRATE_DIFF_GAIN_CMD;
1538                         cmd.diff_gain_a = data->delta_gain_code[0];
1539                         cmd.diff_gain_b = data->delta_gain_code[1];
1540                         cmd.diff_gain_c = data->delta_gain_code[2];
1541                         rc = iwl4965_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
1542                                               sizeof(cmd), &cmd);
1543                         if (rc)
1544                                 IWL_DEBUG_CALIB("fail sending cmd "
1545                                              "REPLY_PHY_CALIBRATION_CMD \n");
1546
1547                         /* TODO we might want recalculate
1548                          * rx_chain in rxon cmd */
1549
1550                         /* Mark so we run this algo only once! */
1551                         data->state = IWL_CHAIN_NOISE_CALIBRATED;
1552                 }
1553                 data->chain_noise_a = 0;
1554                 data->chain_noise_b = 0;
1555                 data->chain_noise_c = 0;
1556                 data->chain_signal_a = 0;
1557                 data->chain_signal_b = 0;
1558                 data->chain_signal_c = 0;
1559                 data->beacon_count = 0;
1560         }
1561         return;
1562 }
1563
1564 static void iwl4965_sensitivity_calibration(struct iwl_priv *priv,
1565                                             struct iwl4965_notif_statistics *resp)
1566 {
1567         int rc = 0;
1568         u32 rx_enable_time;
1569         u32 fa_cck;
1570         u32 fa_ofdm;
1571         u32 bad_plcp_cck;
1572         u32 bad_plcp_ofdm;
1573         u32 norm_fa_ofdm;
1574         u32 norm_fa_cck;
1575         struct iwl4965_sensitivity_data *data = NULL;
1576         struct statistics_rx_non_phy *rx_info = &(resp->rx.general);
1577         struct statistics_rx *statistics = &(resp->rx);
1578         unsigned long flags;
1579         struct statistics_general_data statis;
1580
1581         data = &(priv->sensitivity_data);
1582
1583         if (!iwl4965_is_associated(priv)) {
1584                 IWL_DEBUG_CALIB("<< - not associated\n");
1585                 return;
1586         }
1587
1588         spin_lock_irqsave(&priv->lock, flags);
1589         if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) {
1590                 IWL_DEBUG_CALIB("<< invalid data.\n");
1591                 spin_unlock_irqrestore(&priv->lock, flags);
1592                 return;
1593         }
1594
1595         /* Extract Statistics: */
1596         rx_enable_time = le32_to_cpu(rx_info->channel_load);
1597         fa_cck = le32_to_cpu(statistics->cck.false_alarm_cnt);
1598         fa_ofdm = le32_to_cpu(statistics->ofdm.false_alarm_cnt);
1599         bad_plcp_cck = le32_to_cpu(statistics->cck.plcp_err);
1600         bad_plcp_ofdm = le32_to_cpu(statistics->ofdm.plcp_err);
1601
1602         statis.beacon_silence_rssi_a =
1603                         le32_to_cpu(statistics->general.beacon_silence_rssi_a);
1604         statis.beacon_silence_rssi_b =
1605                         le32_to_cpu(statistics->general.beacon_silence_rssi_b);
1606         statis.beacon_silence_rssi_c =
1607                         le32_to_cpu(statistics->general.beacon_silence_rssi_c);
1608         statis.beacon_energy_a =
1609                         le32_to_cpu(statistics->general.beacon_energy_a);
1610         statis.beacon_energy_b =
1611                         le32_to_cpu(statistics->general.beacon_energy_b);
1612         statis.beacon_energy_c =
1613                         le32_to_cpu(statistics->general.beacon_energy_c);
1614
1615         spin_unlock_irqrestore(&priv->lock, flags);
1616
1617         IWL_DEBUG_CALIB("rx_enable_time = %u usecs\n", rx_enable_time);
1618
1619         if (!rx_enable_time) {
1620                 IWL_DEBUG_CALIB("<< RX Enable Time == 0! \n");
1621                 return;
1622         }
1623
1624         /* These statistics increase monotonically, and do not reset
1625          *   at each beacon.  Calculate difference from last value, or just
1626          *   use the new statistics value if it has reset or wrapped around. */
1627         if (data->last_bad_plcp_cnt_cck > bad_plcp_cck)
1628                 data->last_bad_plcp_cnt_cck = bad_plcp_cck;
1629         else {
1630                 bad_plcp_cck -= data->last_bad_plcp_cnt_cck;
1631                 data->last_bad_plcp_cnt_cck += bad_plcp_cck;
1632         }
1633
1634         if (data->last_bad_plcp_cnt_ofdm > bad_plcp_ofdm)
1635                 data->last_bad_plcp_cnt_ofdm = bad_plcp_ofdm;
1636         else {
1637                 bad_plcp_ofdm -= data->last_bad_plcp_cnt_ofdm;
1638                 data->last_bad_plcp_cnt_ofdm += bad_plcp_ofdm;
1639         }
1640
1641         if (data->last_fa_cnt_ofdm > fa_ofdm)
1642                 data->last_fa_cnt_ofdm = fa_ofdm;
1643         else {
1644                 fa_ofdm -= data->last_fa_cnt_ofdm;
1645                 data->last_fa_cnt_ofdm += fa_ofdm;
1646         }
1647
1648         if (data->last_fa_cnt_cck > fa_cck)
1649                 data->last_fa_cnt_cck = fa_cck;
1650         else {
1651                 fa_cck -= data->last_fa_cnt_cck;
1652                 data->last_fa_cnt_cck += fa_cck;
1653         }
1654
1655         /* Total aborted signal locks */
1656         norm_fa_ofdm = fa_ofdm + bad_plcp_ofdm;
1657         norm_fa_cck = fa_cck + bad_plcp_cck;
1658
1659         IWL_DEBUG_CALIB("cck: fa %u badp %u  ofdm: fa %u badp %u\n", fa_cck,
1660                         bad_plcp_cck, fa_ofdm, bad_plcp_ofdm);
1661
1662         iwl4965_sens_auto_corr_ofdm(priv, norm_fa_ofdm, rx_enable_time);
1663         iwl4965_sens_energy_cck(priv, norm_fa_cck, rx_enable_time, &statis);
1664         rc |= iwl4965_sensitivity_write(priv, CMD_ASYNC);
1665
1666         return;
1667 }
1668
1669 static void iwl4965_bg_sensitivity_work(struct work_struct *work)
1670 {
1671         struct iwl_priv *priv = container_of(work, struct iwl_priv,
1672                         sensitivity_work);
1673
1674         mutex_lock(&priv->mutex);
1675
1676         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
1677             test_bit(STATUS_SCANNING, &priv->status)) {
1678                 mutex_unlock(&priv->mutex);
1679                 return;
1680         }
1681
1682         if (priv->start_calib) {
1683                 iwl4965_noise_calibration(priv, &priv->statistics);
1684
1685                 if (priv->sensitivity_data.state ==
1686                                         IWL_SENS_CALIB_NEED_REINIT) {
1687                         iwl4965_init_sensitivity(priv, CMD_ASYNC, 0);
1688                         priv->sensitivity_data.state = IWL_SENS_CALIB_ALLOWED;
1689                 } else
1690                         iwl4965_sensitivity_calibration(priv,
1691                                         &priv->statistics);
1692         }
1693
1694         mutex_unlock(&priv->mutex);
1695         return;
1696 }
1697 #endif /*CONFIG_IWL4965_SENSITIVITY*/
1698
1699 static void iwl4965_bg_txpower_work(struct work_struct *work)
1700 {
1701         struct iwl_priv *priv = container_of(work, struct iwl_priv,
1702                         txpower_work);
1703
1704         /* If a scan happened to start before we got here
1705          * then just return; the statistics notification will
1706          * kick off another scheduled work to compensate for
1707          * any temperature delta we missed here. */
1708         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
1709             test_bit(STATUS_SCANNING, &priv->status))
1710                 return;
1711
1712         mutex_lock(&priv->mutex);
1713
1714         /* Regardless of if we are assocaited, we must reconfigure the
1715          * TX power since frames can be sent on non-radar channels while
1716          * not associated */
1717         iwl4965_hw_reg_send_txpower(priv);
1718
1719         /* Update last_temperature to keep is_calib_needed from running
1720          * when it isn't needed... */
1721         priv->last_temperature = priv->temperature;
1722
1723         mutex_unlock(&priv->mutex);
1724 }
1725
1726 /*
1727  * Acquire priv->lock before calling this function !
1728  */
1729 static void iwl4965_set_wr_ptrs(struct iwl_priv *priv, int txq_id, u32 index)
1730 {
1731         iwl4965_write_direct32(priv, HBUS_TARG_WRPTR,
1732                              (index & 0xff) | (txq_id << 8));
1733         iwl4965_write_prph(priv, KDR_SCD_QUEUE_RDPTR(txq_id), index);
1734 }
1735
1736 /**
1737  * iwl4965_tx_queue_set_status - (optionally) start Tx/Cmd queue
1738  * @tx_fifo_id: Tx DMA/FIFO channel (range 0-7) that the queue will feed
1739  * @scd_retry: (1) Indicates queue will be used in aggregation mode
1740  *
1741  * NOTE:  Acquire priv->lock before calling this function !
1742  */
1743 static void iwl4965_tx_queue_set_status(struct iwl_priv *priv,
1744                                         struct iwl4965_tx_queue *txq,
1745                                         int tx_fifo_id, int scd_retry)
1746 {
1747         int txq_id = txq->q.id;
1748
1749         /* Find out whether to activate Tx queue */
1750         int active = test_bit(txq_id, &priv->txq_ctx_active_msk)?1:0;
1751
1752         /* Set up and activate */
1753         iwl4965_write_prph(priv, KDR_SCD_QUEUE_STATUS_BITS(txq_id),
1754                                  (active << SCD_QUEUE_STTS_REG_POS_ACTIVE) |
1755                                  (tx_fifo_id << SCD_QUEUE_STTS_REG_POS_TXF) |
1756                                  (scd_retry << SCD_QUEUE_STTS_REG_POS_WSL) |
1757                                  (scd_retry << SCD_QUEUE_STTS_REG_POS_SCD_ACK) |
1758                                  SCD_QUEUE_STTS_REG_MSK);
1759
1760         txq->sched_retry = scd_retry;
1761
1762         IWL_DEBUG_INFO("%s %s Queue %d on AC %d\n",
1763                        active ? "Activate" : "Deactivate",
1764                        scd_retry ? "BA" : "AC", txq_id, tx_fifo_id);
1765 }
1766
1767 static const u16 default_queue_to_tx_fifo[] = {
1768         IWL_TX_FIFO_AC3,
1769         IWL_TX_FIFO_AC2,
1770         IWL_TX_FIFO_AC1,
1771         IWL_TX_FIFO_AC0,
1772         IWL_CMD_FIFO_NUM,
1773         IWL_TX_FIFO_HCCA_1,
1774         IWL_TX_FIFO_HCCA_2
1775 };
1776
1777 static inline void iwl4965_txq_ctx_activate(struct iwl_priv *priv, int txq_id)
1778 {
1779         set_bit(txq_id, &priv->txq_ctx_active_msk);
1780 }
1781
1782 static inline void iwl4965_txq_ctx_deactivate(struct iwl_priv *priv, int txq_id)
1783 {
1784         clear_bit(txq_id, &priv->txq_ctx_active_msk);
1785 }
1786
1787 int iwl4965_alive_notify(struct iwl_priv *priv)
1788 {
1789         u32 a;
1790         int i = 0;
1791         unsigned long flags;
1792         int rc;
1793
1794         spin_lock_irqsave(&priv->lock, flags);
1795
1796 #ifdef CONFIG_IWL4965_SENSITIVITY
1797         memset(&(priv->sensitivity_data), 0,
1798                sizeof(struct iwl4965_sensitivity_data));
1799         memset(&(priv->chain_noise_data), 0,
1800                sizeof(struct iwl4965_chain_noise_data));
1801         for (i = 0; i < NUM_RX_CHAINS; i++)
1802                 priv->chain_noise_data.delta_gain_code[i] =
1803                                 CHAIN_NOISE_DELTA_GAIN_INIT_VAL;
1804 #endif /* CONFIG_IWL4965_SENSITIVITY*/
1805         rc = iwl4965_grab_nic_access(priv);
1806         if (rc) {
1807                 spin_unlock_irqrestore(&priv->lock, flags);
1808                 return rc;
1809         }
1810
1811         /* Clear 4965's internal Tx Scheduler data base */
1812         priv->scd_base_addr = iwl4965_read_prph(priv, KDR_SCD_SRAM_BASE_ADDR);
1813         a = priv->scd_base_addr + SCD_CONTEXT_DATA_OFFSET;
1814         for (; a < priv->scd_base_addr + SCD_TX_STTS_BITMAP_OFFSET; a += 4)
1815                 iwl4965_write_targ_mem(priv, a, 0);
1816         for (; a < priv->scd_base_addr + SCD_TRANSLATE_TBL_OFFSET; a += 4)
1817                 iwl4965_write_targ_mem(priv, a, 0);
1818         for (; a < sizeof(u16) * priv->hw_setting.max_txq_num; a += 4)
1819                 iwl4965_write_targ_mem(priv, a, 0);
1820
1821         /* Tel 4965 where to find Tx byte count tables */
1822         iwl4965_write_prph(priv, KDR_SCD_DRAM_BASE_ADDR,
1823                 (priv->hw_setting.shared_phys +
1824                  offsetof(struct iwl4965_shared, queues_byte_cnt_tbls)) >> 10);
1825
1826         /* Disable chain mode for all queues */
1827         iwl4965_write_prph(priv, KDR_SCD_QUEUECHAIN_SEL, 0);
1828
1829         /* Initialize each Tx queue (including the command queue) */
1830         for (i = 0; i < priv->hw_setting.max_txq_num; i++) {
1831
1832                 /* TFD circular buffer read/write indexes */
1833                 iwl4965_write_prph(priv, KDR_SCD_QUEUE_RDPTR(i), 0);
1834                 iwl4965_write_direct32(priv, HBUS_TARG_WRPTR, 0 | (i << 8));
1835
1836                 /* Max Tx Window size for Scheduler-ACK mode */
1837                 iwl4965_write_targ_mem(priv, priv->scd_base_addr +
1838                                         SCD_CONTEXT_QUEUE_OFFSET(i),
1839                                         (SCD_WIN_SIZE <<
1840                                         SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
1841                                         SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
1842
1843                 /* Frame limit */
1844                 iwl4965_write_targ_mem(priv, priv->scd_base_addr +
1845                                         SCD_CONTEXT_QUEUE_OFFSET(i) +
1846                                         sizeof(u32),
1847                                         (SCD_FRAME_LIMIT <<
1848                                         SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) &
1849                                         SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
1850
1851         }
1852         iwl4965_write_prph(priv, KDR_SCD_INTERRUPT_MASK,
1853                                  (1 << priv->hw_setting.max_txq_num) - 1);
1854
1855         /* Activate all Tx DMA/FIFO channels */
1856         iwl4965_write_prph(priv, KDR_SCD_TXFACT,
1857                                  SCD_TXFACT_REG_TXFIFO_MASK(0, 7));
1858
1859         iwl4965_set_wr_ptrs(priv, IWL_CMD_QUEUE_NUM, 0);
1860
1861         /* Map each Tx/cmd queue to its corresponding fifo */
1862         for (i = 0; i < ARRAY_SIZE(default_queue_to_tx_fifo); i++) {
1863                 int ac = default_queue_to_tx_fifo[i];
1864                 iwl4965_txq_ctx_activate(priv, i);
1865                 iwl4965_tx_queue_set_status(priv, &priv->txq[i], ac, 0);
1866         }
1867
1868         iwl4965_release_nic_access(priv);
1869         spin_unlock_irqrestore(&priv->lock, flags);
1870
1871         return 0;
1872 }
1873
1874 /**
1875  * iwl4965_hw_set_hw_setting
1876  *
1877  * Called when initializing driver
1878  */
1879 int iwl4965_hw_set_hw_setting(struct iwl_priv *priv)
1880 {
1881         int ret = 0;
1882
1883         if ((iwl4965_mod_params.num_of_queues > IWL_MAX_NUM_QUEUES) ||
1884             (iwl4965_mod_params.num_of_queues < IWL_MIN_NUM_QUEUES)) {
1885                 IWL_ERROR("invalid queues_num, should be between %d and %d\n",
1886                           IWL_MIN_NUM_QUEUES, IWL_MAX_NUM_QUEUES);
1887                 ret = -EINVAL;
1888                 goto out;
1889         }
1890
1891         /* Allocate area for Tx byte count tables and Rx queue status */
1892         priv->hw_setting.shared_virt =
1893             pci_alloc_consistent(priv->pci_dev,
1894                                  sizeof(struct iwl4965_shared),
1895                                  &priv->hw_setting.shared_phys);
1896
1897         if (!priv->hw_setting.shared_virt) {
1898                 ret = -ENOMEM;
1899                 goto out;
1900         }
1901
1902         memset(priv->hw_setting.shared_virt, 0, sizeof(struct iwl4965_shared));
1903
1904         priv->hw_setting.max_txq_num = iwl4965_mod_params.num_of_queues;
1905         priv->hw_setting.tx_cmd_len = sizeof(struct iwl4965_tx_cmd);
1906         priv->hw_setting.max_rxq_size = RX_QUEUE_SIZE;
1907         priv->hw_setting.max_rxq_log = RX_QUEUE_SIZE_LOG;
1908         if (iwl4965_mod_params.amsdu_size_8K)
1909                 priv->hw_setting.rx_buf_size = IWL_RX_BUF_SIZE_8K;
1910         else
1911                 priv->hw_setting.rx_buf_size = IWL_RX_BUF_SIZE_4K;
1912         priv->hw_setting.max_pkt_size = priv->hw_setting.rx_buf_size - 256;
1913         priv->hw_setting.max_stations = IWL4965_STATION_COUNT;
1914         priv->hw_setting.bcast_sta_id = IWL4965_BROADCAST_ID;
1915
1916         priv->hw_setting.tx_ant_num = 2;
1917
1918 out:
1919         return ret;
1920 }
1921
1922 /**
1923  * iwl4965_hw_txq_ctx_free - Free TXQ Context
1924  *
1925  * Destroy all TX DMA queues and structures
1926  */
1927 void iwl4965_hw_txq_ctx_free(struct iwl_priv *priv)
1928 {
1929         int txq_id;
1930
1931         /* Tx queues */
1932         for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++)
1933                 iwl4965_tx_queue_free(priv, &priv->txq[txq_id]);
1934
1935         /* Keep-warm buffer */
1936         iwl4965_kw_free(priv);
1937 }
1938
1939 /**
1940  * iwl4965_hw_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr]
1941  *
1942  * Does NOT advance any TFD circular buffer read/write indexes
1943  * Does NOT free the TFD itself (which is within circular buffer)
1944  */
1945 int iwl4965_hw_txq_free_tfd(struct iwl_priv *priv, struct iwl4965_tx_queue *txq)
1946 {
1947         struct iwl4965_tfd_frame *bd_tmp = (struct iwl4965_tfd_frame *)&txq->bd[0];
1948         struct iwl4965_tfd_frame *bd = &bd_tmp[txq->q.read_ptr];
1949         struct pci_dev *dev = priv->pci_dev;
1950         int i;
1951         int counter = 0;
1952         int index, is_odd;
1953
1954         /* Host command buffers stay mapped in memory, nothing to clean */
1955         if (txq->q.id == IWL_CMD_QUEUE_NUM)
1956                 return 0;
1957
1958         /* Sanity check on number of chunks */
1959         counter = IWL_GET_BITS(*bd, num_tbs);
1960         if (counter > MAX_NUM_OF_TBS) {
1961                 IWL_ERROR("Too many chunks: %i\n", counter);
1962                 /* @todo issue fatal error, it is quite serious situation */
1963                 return 0;
1964         }
1965
1966         /* Unmap chunks, if any.
1967          * TFD info for odd chunks is different format than for even chunks. */
1968         for (i = 0; i < counter; i++) {
1969                 index = i / 2;
1970                 is_odd = i & 0x1;
1971
1972                 if (is_odd)
1973                         pci_unmap_single(
1974                                 dev,
1975                                 IWL_GET_BITS(bd->pa[index], tb2_addr_lo16) |
1976                                 (IWL_GET_BITS(bd->pa[index],
1977                                               tb2_addr_hi20) << 16),
1978                                 IWL_GET_BITS(bd->pa[index], tb2_len),
1979                                 PCI_DMA_TODEVICE);
1980
1981                 else if (i > 0)
1982                         pci_unmap_single(dev,
1983                                          le32_to_cpu(bd->pa[index].tb1_addr),
1984                                          IWL_GET_BITS(bd->pa[index], tb1_len),
1985                                          PCI_DMA_TODEVICE);
1986
1987                 /* Free SKB, if any, for this chunk */
1988                 if (txq->txb[txq->q.read_ptr].skb[i]) {
1989                         struct sk_buff *skb = txq->txb[txq->q.read_ptr].skb[i];
1990
1991                         dev_kfree_skb(skb);
1992                         txq->txb[txq->q.read_ptr].skb[i] = NULL;
1993                 }
1994         }
1995         return 0;
1996 }
1997
1998 int iwl4965_hw_reg_set_txpower(struct iwl_priv *priv, s8 power)
1999 {
2000         IWL_ERROR("TODO: Implement iwl4965_hw_reg_set_txpower!\n");
2001         return -EINVAL;
2002 }
2003
2004 static s32 iwl4965_math_div_round(s32 num, s32 denom, s32 *res)
2005 {
2006         s32 sign = 1;
2007
2008         if (num < 0) {
2009                 sign = -sign;
2010                 num = -num;
2011         }
2012         if (denom < 0) {
2013                 sign = -sign;
2014                 denom = -denom;
2015         }
2016         *res = 1;
2017         *res = ((num * 2 + denom) / (denom * 2)) * sign;
2018
2019         return 1;
2020 }
2021
2022 /**
2023  * iwl4965_get_voltage_compensation - Power supply voltage comp for txpower
2024  *
2025  * Determines power supply voltage compensation for txpower calculations.
2026  * Returns number of 1/2-dB steps to subtract from gain table index,
2027  * to compensate for difference between power supply voltage during
2028  * factory measurements, vs. current power supply voltage.
2029  *
2030  * Voltage indication is higher for lower voltage.
2031  * Lower voltage requires more gain (lower gain table index).
2032  */
2033 static s32 iwl4965_get_voltage_compensation(s32 eeprom_voltage,
2034                                             s32 current_voltage)
2035 {
2036         s32 comp = 0;
2037
2038         if ((TX_POWER_IWL_ILLEGAL_VOLTAGE == eeprom_voltage) ||
2039             (TX_POWER_IWL_ILLEGAL_VOLTAGE == current_voltage))
2040                 return 0;
2041
2042         iwl4965_math_div_round(current_voltage - eeprom_voltage,
2043                                TX_POWER_IWL_VOLTAGE_CODES_PER_03V, &comp);
2044
2045         if (current_voltage > eeprom_voltage)
2046                 comp *= 2;
2047         if ((comp < -2) || (comp > 2))
2048                 comp = 0;
2049
2050         return comp;
2051 }
2052
2053 static const struct iwl_channel_info *
2054 iwl4965_get_channel_txpower_info(struct iwl_priv *priv,
2055                                  enum ieee80211_band band, u16 channel)
2056 {
2057         const struct iwl_channel_info *ch_info;
2058
2059         ch_info = iwl_get_channel_info(priv, band, channel);
2060
2061         if (!is_channel_valid(ch_info))
2062                 return NULL;
2063
2064         return ch_info;
2065 }
2066
2067 static s32 iwl4965_get_tx_atten_grp(u16 channel)
2068 {
2069         if (channel >= CALIB_IWL_TX_ATTEN_GR5_FCH &&
2070             channel <= CALIB_IWL_TX_ATTEN_GR5_LCH)
2071                 return CALIB_CH_GROUP_5;
2072
2073         if (channel >= CALIB_IWL_TX_ATTEN_GR1_FCH &&
2074             channel <= CALIB_IWL_TX_ATTEN_GR1_LCH)
2075                 return CALIB_CH_GROUP_1;
2076
2077         if (channel >= CALIB_IWL_TX_ATTEN_GR2_FCH &&
2078             channel <= CALIB_IWL_TX_ATTEN_GR2_LCH)
2079                 return CALIB_CH_GROUP_2;
2080
2081         if (channel >= CALIB_IWL_TX_ATTEN_GR3_FCH &&
2082             channel <= CALIB_IWL_TX_ATTEN_GR3_LCH)
2083                 return CALIB_CH_GROUP_3;
2084
2085         if (channel >= CALIB_IWL_TX_ATTEN_GR4_FCH &&
2086             channel <= CALIB_IWL_TX_ATTEN_GR4_LCH)
2087                 return CALIB_CH_GROUP_4;
2088
2089         IWL_ERROR("Can't find txatten group for channel %d.\n", channel);
2090         return -1;
2091 }
2092
2093 static u32 iwl4965_get_sub_band(const struct iwl_priv *priv, u32 channel)
2094 {
2095         s32 b = -1;
2096
2097         for (b = 0; b < EEPROM_TX_POWER_BANDS; b++) {
2098                 if (priv->eeprom.calib_info.band_info[b].ch_from == 0)
2099                         continue;
2100
2101                 if ((channel >= priv->eeprom.calib_info.band_info[b].ch_from)
2102                     && (channel <= priv->eeprom.calib_info.band_info[b].ch_to))
2103                         break;
2104         }
2105
2106         return b;
2107 }
2108
2109 static s32 iwl4965_interpolate_value(s32 x, s32 x1, s32 y1, s32 x2, s32 y2)
2110 {
2111         s32 val;
2112
2113         if (x2 == x1)
2114                 return y1;
2115         else {
2116                 iwl4965_math_div_round((x2 - x) * (y1 - y2), (x2 - x1), &val);
2117                 return val + y2;
2118         }
2119 }
2120
2121 /**
2122  * iwl4965_interpolate_chan - Interpolate factory measurements for one channel
2123  *
2124  * Interpolates factory measurements from the two sample channels within a
2125  * sub-band, to apply to channel of interest.  Interpolation is proportional to
2126  * differences in channel frequencies, which is proportional to differences
2127  * in channel number.
2128  */
2129 static int iwl4965_interpolate_chan(struct iwl_priv *priv, u32 channel,
2130                                     struct iwl4965_eeprom_calib_ch_info *chan_info)
2131 {
2132         s32 s = -1;
2133         u32 c;
2134         u32 m;
2135         const struct iwl4965_eeprom_calib_measure *m1;
2136         const struct iwl4965_eeprom_calib_measure *m2;
2137         struct iwl4965_eeprom_calib_measure *omeas;
2138         u32 ch_i1;
2139         u32 ch_i2;
2140
2141         s = iwl4965_get_sub_band(priv, channel);
2142         if (s >= EEPROM_TX_POWER_BANDS) {
2143                 IWL_ERROR("Tx Power can not find channel %d ", channel);
2144                 return -1;
2145         }
2146
2147         ch_i1 = priv->eeprom.calib_info.band_info[s].ch1.ch_num;
2148         ch_i2 = priv->eeprom.calib_info.band_info[s].ch2.ch_num;
2149         chan_info->ch_num = (u8) channel;
2150
2151         IWL_DEBUG_TXPOWER("channel %d subband %d factory cal ch %d & %d\n",
2152                           channel, s, ch_i1, ch_i2);
2153
2154         for (c = 0; c < EEPROM_TX_POWER_TX_CHAINS; c++) {
2155                 for (m = 0; m < EEPROM_TX_POWER_MEASUREMENTS; m++) {
2156                         m1 = &(priv->eeprom.calib_info.band_info[s].ch1.
2157                                measurements[c][m]);
2158                         m2 = &(priv->eeprom.calib_info.band_info[s].ch2.
2159                                measurements[c][m]);
2160                         omeas = &(chan_info->measurements[c][m]);
2161
2162                         omeas->actual_pow =
2163                             (u8) iwl4965_interpolate_value(channel, ch_i1,
2164                                                            m1->actual_pow,
2165                                                            ch_i2,
2166                                                            m2->actual_pow);
2167                         omeas->gain_idx =
2168                             (u8) iwl4965_interpolate_value(channel, ch_i1,
2169                                                            m1->gain_idx, ch_i2,
2170                                                            m2->gain_idx);
2171                         omeas->temperature =
2172                             (u8) iwl4965_interpolate_value(channel, ch_i1,
2173                                                            m1->temperature,
2174                                                            ch_i2,
2175                                                            m2->temperature);
2176                         omeas->pa_det =
2177                             (s8) iwl4965_interpolate_value(channel, ch_i1,
2178                                                            m1->pa_det, ch_i2,
2179                                                            m2->pa_det);
2180
2181                         IWL_DEBUG_TXPOWER
2182                             ("chain %d meas %d AP1=%d AP2=%d AP=%d\n", c, m,
2183                              m1->actual_pow, m2->actual_pow, omeas->actual_pow);
2184                         IWL_DEBUG_TXPOWER
2185                             ("chain %d meas %d NI1=%d NI2=%d NI=%d\n", c, m,
2186                              m1->gain_idx, m2->gain_idx, omeas->gain_idx);
2187                         IWL_DEBUG_TXPOWER
2188                             ("chain %d meas %d PA1=%d PA2=%d PA=%d\n", c, m,
2189                              m1->pa_det, m2->pa_det, omeas->pa_det);
2190                         IWL_DEBUG_TXPOWER
2191                             ("chain %d meas %d  T1=%d  T2=%d  T=%d\n", c, m,
2192                              m1->temperature, m2->temperature,
2193                              omeas->temperature);
2194                 }
2195         }
2196
2197         return 0;
2198 }
2199
2200 /* bit-rate-dependent table to prevent Tx distortion, in half-dB units,
2201  * for OFDM 6, 12, 18, 24, 36, 48, 54, 60 MBit, and CCK all rates. */
2202 static s32 back_off_table[] = {
2203         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 20 MHz */
2204         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 20 MHz */
2205         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 40 MHz */
2206         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 40 MHz */
2207         10                      /* CCK */
2208 };
2209
2210 /* Thermal compensation values for txpower for various frequency ranges ...
2211  *   ratios from 3:1 to 4.5:1 of degrees (Celsius) per half-dB gain adjust */
2212 static struct iwl4965_txpower_comp_entry {
2213         s32 degrees_per_05db_a;
2214         s32 degrees_per_05db_a_denom;
2215 } tx_power_cmp_tble[CALIB_CH_GROUP_MAX] = {
2216         {9, 2},                 /* group 0 5.2, ch  34-43 */
2217         {4, 1},                 /* group 1 5.2, ch  44-70 */
2218         {4, 1},                 /* group 2 5.2, ch  71-124 */
2219         {4, 1},                 /* group 3 5.2, ch 125-200 */
2220         {3, 1}                  /* group 4 2.4, ch   all */
2221 };
2222
2223 static s32 get_min_power_index(s32 rate_power_index, u32 band)
2224 {
2225         if (!band) {
2226                 if ((rate_power_index & 7) <= 4)
2227                         return MIN_TX_GAIN_INDEX_52GHZ_EXT;
2228         }
2229         return MIN_TX_GAIN_INDEX;
2230 }
2231
2232 struct gain_entry {
2233         u8 dsp;
2234         u8 radio;
2235 };
2236
2237 static const struct gain_entry gain_table[2][108] = {
2238         /* 5.2GHz power gain index table */
2239         {
2240          {123, 0x3F},           /* highest txpower */
2241          {117, 0x3F},
2242          {110, 0x3F},
2243          {104, 0x3F},
2244          {98, 0x3F},
2245          {110, 0x3E},
2246          {104, 0x3E},
2247          {98, 0x3E},
2248          {110, 0x3D},
2249          {104, 0x3D},
2250          {98, 0x3D},
2251          {110, 0x3C},
2252          {104, 0x3C},
2253          {98, 0x3C},
2254          {110, 0x3B},
2255          {104, 0x3B},
2256          {98, 0x3B},
2257          {110, 0x3A},
2258          {104, 0x3A},
2259          {98, 0x3A},
2260          {110, 0x39},
2261          {104, 0x39},
2262          {98, 0x39},
2263          {110, 0x38},
2264          {104, 0x38},
2265          {98, 0x38},
2266          {110, 0x37},
2267          {104, 0x37},
2268          {98, 0x37},
2269          {110, 0x36},
2270          {104, 0x36},
2271          {98, 0x36},
2272          {110, 0x35},
2273          {104, 0x35},
2274          {98, 0x35},
2275          {110, 0x34},
2276          {104, 0x34},
2277          {98, 0x34},
2278          {110, 0x33},
2279          {104, 0x33},
2280          {98, 0x33},
2281          {110, 0x32},
2282          {104, 0x32},
2283          {98, 0x32},
2284          {110, 0x31},
2285          {104, 0x31},
2286          {98, 0x31},
2287          {110, 0x30},
2288          {104, 0x30},
2289          {98, 0x30},
2290          {110, 0x25},
2291          {104, 0x25},
2292          {98, 0x25},
2293          {110, 0x24},
2294          {104, 0x24},
2295          {98, 0x24},
2296          {110, 0x23},
2297          {104, 0x23},
2298          {98, 0x23},
2299          {110, 0x22},
2300          {104, 0x18},
2301          {98, 0x18},
2302          {110, 0x17},
2303          {104, 0x17},
2304          {98, 0x17},
2305          {110, 0x16},
2306          {104, 0x16},
2307          {98, 0x16},
2308          {110, 0x15},
2309          {104, 0x15},
2310          {98, 0x15},
2311          {110, 0x14},
2312          {104, 0x14},
2313          {98, 0x14},
2314          {110, 0x13},
2315          {104, 0x13},
2316          {98, 0x13},
2317          {110, 0x12},
2318          {104, 0x08},
2319          {98, 0x08},
2320          {110, 0x07},
2321          {104, 0x07},
2322          {98, 0x07},
2323          {110, 0x06},
2324          {104, 0x06},
2325          {98, 0x06},
2326          {110, 0x05},
2327          {104, 0x05},
2328          {98, 0x05},
2329          {110, 0x04},
2330          {104, 0x04},
2331          {98, 0x04},
2332          {110, 0x03},
2333          {104, 0x03},
2334          {98, 0x03},
2335          {110, 0x02},
2336          {104, 0x02},
2337          {98, 0x02},
2338          {110, 0x01},
2339          {104, 0x01},
2340          {98, 0x01},
2341          {110, 0x00},
2342          {104, 0x00},
2343          {98, 0x00},
2344          {93, 0x00},
2345          {88, 0x00},
2346          {83, 0x00},
2347          {78, 0x00},
2348          },
2349         /* 2.4GHz power gain index table */
2350         {
2351          {110, 0x3f},           /* highest txpower */
2352          {104, 0x3f},
2353          {98, 0x3f},
2354          {110, 0x3e},
2355          {104, 0x3e},
2356          {98, 0x3e},
2357          {110, 0x3d},
2358          {104, 0x3d},
2359          {98, 0x3d},
2360          {110, 0x3c},
2361          {104, 0x3c},
2362          {98, 0x3c},
2363          {110, 0x3b},
2364          {104, 0x3b},
2365          {98, 0x3b},
2366          {110, 0x3a},
2367          {104, 0x3a},
2368          {98, 0x3a},
2369          {110, 0x39},
2370          {104, 0x39},
2371          {98, 0x39},
2372          {110, 0x38},
2373          {104, 0x38},
2374          {98, 0x38},
2375          {110, 0x37},
2376          {104, 0x37},
2377          {98, 0x37},
2378          {110, 0x36},
2379          {104, 0x36},
2380          {98, 0x36},
2381          {110, 0x35},
2382          {104, 0x35},
2383          {98, 0x35},
2384          {110, 0x34},
2385          {104, 0x34},
2386          {98, 0x34},
2387          {110, 0x33},
2388          {104, 0x33},
2389          {98, 0x33},
2390          {110, 0x32},
2391          {104, 0x32},
2392          {98, 0x32},
2393          {110, 0x31},
2394          {104, 0x31},
2395          {98, 0x31},
2396          {110, 0x30},
2397          {104, 0x30},
2398          {98, 0x30},
2399          {110, 0x6},
2400          {104, 0x6},
2401          {98, 0x6},
2402          {110, 0x5},
2403          {104, 0x5},
2404          {98, 0x5},
2405          {110, 0x4},
2406          {104, 0x4},
2407          {98, 0x4},
2408          {110, 0x3},
2409          {104, 0x3},
2410          {98, 0x3},
2411          {110, 0x2},
2412          {104, 0x2},
2413          {98, 0x2},
2414          {110, 0x1},
2415          {104, 0x1},
2416          {98, 0x1},
2417          {110, 0x0},
2418          {104, 0x0},
2419          {98, 0x0},
2420          {97, 0},
2421          {96, 0},
2422          {95, 0},
2423          {94, 0},
2424          {93, 0},
2425          {92, 0},
2426          {91, 0},
2427          {90, 0},
2428          {89, 0},
2429          {88, 0},
2430          {87, 0},
2431          {86, 0},
2432          {85, 0},
2433          {84, 0},
2434          {83, 0},
2435          {82, 0},
2436          {81, 0},
2437          {80, 0},
2438          {79, 0},
2439          {78, 0},
2440          {77, 0},
2441          {76, 0},
2442          {75, 0},
2443          {74, 0},
2444          {73, 0},
2445          {72, 0},
2446          {71, 0},
2447          {70, 0},
2448          {69, 0},
2449          {68, 0},
2450          {67, 0},
2451          {66, 0},
2452          {65, 0},
2453          {64, 0},
2454          {63, 0},
2455          {62, 0},
2456          {61, 0},
2457          {60, 0},
2458          {59, 0},
2459          }
2460 };
2461
2462 static int iwl4965_fill_txpower_tbl(struct iwl_priv *priv, u8 band, u16 channel,
2463                                     u8 is_fat, u8 ctrl_chan_high,
2464                                     struct iwl4965_tx_power_db *tx_power_tbl)
2465 {
2466         u8 saturation_power;
2467         s32 target_power;
2468         s32 user_target_power;
2469         s32 power_limit;
2470         s32 current_temp;
2471         s32 reg_limit;
2472         s32 current_regulatory;
2473         s32 txatten_grp = CALIB_CH_GROUP_MAX;
2474         int i;
2475         int c;
2476         const struct iwl_channel_info *ch_info = NULL;
2477         struct iwl4965_eeprom_calib_ch_info ch_eeprom_info;
2478         const struct iwl4965_eeprom_calib_measure *measurement;
2479         s16 voltage;
2480         s32 init_voltage;
2481         s32 voltage_compensation;
2482         s32 degrees_per_05db_num;
2483         s32 degrees_per_05db_denom;
2484         s32 factory_temp;
2485         s32 temperature_comp[2];
2486         s32 factory_gain_index[2];
2487         s32 factory_actual_pwr[2];
2488         s32 power_index;
2489
2490         /* Sanity check requested level (dBm) */
2491         if (priv->user_txpower_limit < IWL_TX_POWER_TARGET_POWER_MIN) {
2492                 IWL_WARNING("Requested user TXPOWER %d below limit.\n",
2493                             priv->user_txpower_limit);
2494                 return -EINVAL;
2495         }
2496         if (priv->user_txpower_limit > IWL_TX_POWER_TARGET_POWER_MAX) {
2497                 IWL_WARNING("Requested user TXPOWER %d above limit.\n",
2498                             priv->user_txpower_limit);
2499                 return -EINVAL;
2500         }
2501
2502         /* user_txpower_limit is in dBm, convert to half-dBm (half-dB units
2503          *   are used for indexing into txpower table) */
2504         user_target_power = 2 * priv->user_txpower_limit;
2505
2506         /* Get current (RXON) channel, band, width */
2507         ch_info =
2508                 iwl4965_get_channel_txpower_info(priv, priv->band, channel);
2509
2510         IWL_DEBUG_TXPOWER("chan %d band %d is_fat %d\n", channel, band,
2511                           is_fat);
2512
2513         if (!ch_info)
2514                 return -EINVAL;
2515
2516         /* get txatten group, used to select 1) thermal txpower adjustment
2517          *   and 2) mimo txpower balance between Tx chains. */
2518         txatten_grp = iwl4965_get_tx_atten_grp(channel);
2519         if (txatten_grp < 0)
2520                 return -EINVAL;
2521
2522         IWL_DEBUG_TXPOWER("channel %d belongs to txatten group %d\n",
2523                           channel, txatten_grp);
2524
2525         if (is_fat) {
2526                 if (ctrl_chan_high)
2527                         channel -= 2;
2528                 else
2529                         channel += 2;
2530         }
2531
2532         /* hardware txpower limits ...
2533          * saturation (clipping distortion) txpowers are in half-dBm */
2534         if (band)
2535                 saturation_power = priv->eeprom.calib_info.saturation_power24;
2536         else
2537                 saturation_power = priv->eeprom.calib_info.saturation_power52;
2538
2539         if (saturation_power < IWL_TX_POWER_SATURATION_MIN ||
2540             saturation_power > IWL_TX_POWER_SATURATION_MAX) {
2541                 if (band)
2542                         saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_24;
2543                 else
2544                         saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_52;
2545         }
2546
2547         /* regulatory txpower limits ... reg_limit values are in half-dBm,
2548          *   max_power_avg values are in dBm, convert * 2 */
2549         if (is_fat)
2550                 reg_limit = ch_info->fat_max_power_avg * 2;
2551         else
2552                 reg_limit = ch_info->max_power_avg * 2;
2553
2554         if ((reg_limit < IWL_TX_POWER_REGULATORY_MIN) ||
2555             (reg_limit > IWL_TX_POWER_REGULATORY_MAX)) {
2556                 if (band)
2557                         reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_24;
2558                 else
2559                         reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_52;
2560         }
2561
2562         /* Interpolate txpower calibration values for this channel,
2563          *   based on factory calibration tests on spaced channels. */
2564         iwl4965_interpolate_chan(priv, channel, &ch_eeprom_info);
2565
2566         /* calculate tx gain adjustment based on power supply voltage */
2567         voltage = priv->eeprom.calib_info.voltage;
2568         init_voltage = (s32)le32_to_cpu(priv->card_alive_init.voltage);
2569         voltage_compensation =
2570             iwl4965_get_voltage_compensation(voltage, init_voltage);
2571
2572         IWL_DEBUG_TXPOWER("curr volt %d eeprom volt %d volt comp %d\n",
2573                           init_voltage,
2574                           voltage, voltage_compensation);
2575
2576         /* get current temperature (Celsius) */
2577         current_temp = max(priv->temperature, IWL_TX_POWER_TEMPERATURE_MIN);
2578         current_temp = min(priv->temperature, IWL_TX_POWER_TEMPERATURE_MAX);
2579         current_temp = KELVIN_TO_CELSIUS(current_temp);
2580
2581         /* select thermal txpower adjustment params, based on channel group
2582          *   (same frequency group used for mimo txatten adjustment) */
2583         degrees_per_05db_num =
2584             tx_power_cmp_tble[txatten_grp].degrees_per_05db_a;
2585         degrees_per_05db_denom =
2586             tx_power_cmp_tble[txatten_grp].degrees_per_05db_a_denom;
2587
2588         /* get per-chain txpower values from factory measurements */
2589         for (c = 0; c < 2; c++) {
2590                 measurement = &ch_eeprom_info.measurements[c][1];
2591
2592                 /* txgain adjustment (in half-dB steps) based on difference
2593                  *   between factory and current temperature */
2594                 factory_temp = measurement->temperature;
2595                 iwl4965_math_div_round((current_temp - factory_temp) *
2596                                        degrees_per_05db_denom,
2597                                        degrees_per_05db_num,
2598                                        &temperature_comp[c]);
2599
2600                 factory_gain_index[c] = measurement->gain_idx;
2601                 factory_actual_pwr[c] = measurement->actual_pow;
2602
2603                 IWL_DEBUG_TXPOWER("chain = %d\n", c);
2604                 IWL_DEBUG_TXPOWER("fctry tmp %d, "
2605                                   "curr tmp %d, comp %d steps\n",
2606                                   factory_temp, current_temp,
2607                                   temperature_comp[c]);
2608
2609                 IWL_DEBUG_TXPOWER("fctry idx %d, fctry pwr %d\n",
2610                                   factory_gain_index[c],
2611                                   factory_actual_pwr[c]);
2612         }
2613
2614         /* for each of 33 bit-rates (including 1 for CCK) */
2615         for (i = 0; i < POWER_TABLE_NUM_ENTRIES; i++) {
2616                 u8 is_mimo_rate;
2617                 union iwl4965_tx_power_dual_stream tx_power;
2618
2619                 /* for mimo, reduce each chain's txpower by half
2620                  * (3dB, 6 steps), so total output power is regulatory
2621                  * compliant. */
2622                 if (i & 0x8) {
2623                         current_regulatory = reg_limit -
2624                             IWL_TX_POWER_MIMO_REGULATORY_COMPENSATION;
2625                         is_mimo_rate = 1;
2626                 } else {
2627                         current_regulatory = reg_limit;
2628                         is_mimo_rate = 0;
2629                 }
2630
2631                 /* find txpower limit, either hardware or regulatory */
2632                 power_limit = saturation_power - back_off_table[i];
2633                 if (power_limit > current_regulatory)
2634                         power_limit = current_regulatory;
2635
2636                 /* reduce user's txpower request if necessary
2637                  * for this rate on this channel */
2638                 target_power = user_target_power;
2639                 if (target_power > power_limit)
2640                         target_power = power_limit;
2641
2642                 IWL_DEBUG_TXPOWER("rate %d sat %d reg %d usr %d tgt %d\n",
2643                                   i, saturation_power - back_off_table[i],
2644                                   current_regulatory, user_target_power,
2645                                   target_power);
2646
2647                 /* for each of 2 Tx chains (radio transmitters) */
2648                 for (c = 0; c < 2; c++) {
2649                         s32 atten_value;
2650
2651                         if (is_mimo_rate)
2652                                 atten_value =
2653                                     (s32)le32_to_cpu(priv->card_alive_init.
2654                                     tx_atten[txatten_grp][c]);
2655                         else
2656                                 atten_value = 0;
2657
2658                         /* calculate index; higher index means lower txpower */
2659                         power_index = (u8) (factory_gain_index[c] -
2660                                             (target_power -
2661                                              factory_actual_pwr[c]) -
2662                                             temperature_comp[c] -
2663                                             voltage_compensation +
2664                                             atten_value);
2665
2666 /*                      IWL_DEBUG_TXPOWER("calculated txpower index %d\n",
2667                                                 power_index); */
2668
2669                         if (power_index < get_min_power_index(i, band))
2670                                 power_index = get_min_power_index(i, band);
2671
2672                         /* adjust 5 GHz index to support negative indexes */
2673                         if (!band)
2674                                 power_index += 9;
2675
2676                         /* CCK, rate 32, reduce txpower for CCK */
2677                         if (i == POWER_TABLE_CCK_ENTRY)
2678                                 power_index +=
2679                                     IWL_TX_POWER_CCK_COMPENSATION_C_STEP;
2680
2681                         /* stay within the table! */
2682                         if (power_index > 107) {
2683                                 IWL_WARNING("txpower index %d > 107\n",
2684                                             power_index);
2685                                 power_index = 107;
2686                         }
2687                         if (power_index < 0) {
2688                                 IWL_WARNING("txpower index %d < 0\n",
2689                                             power_index);
2690                                 power_index = 0;
2691                         }
2692
2693                         /* fill txpower command for this rate/chain */
2694                         tx_power.s.radio_tx_gain[c] =
2695                                 gain_table[band][power_index].radio;
2696                         tx_power.s.dsp_predis_atten[c] =
2697                                 gain_table[band][power_index].dsp;
2698
2699                         IWL_DEBUG_TXPOWER("chain %d mimo %d index %d "
2700                                           "gain 0x%02x dsp %d\n",
2701                                           c, atten_value, power_index,
2702                                         tx_power.s.radio_tx_gain[c],
2703                                         tx_power.s.dsp_predis_atten[c]);
2704                 }/* for each chain */
2705
2706                 tx_power_tbl->power_tbl[i].dw = cpu_to_le32(tx_power.dw);
2707
2708         }/* for each rate */
2709
2710         return 0;
2711 }
2712
2713 /**
2714  * iwl4965_hw_reg_send_txpower - Configure the TXPOWER level user limit
2715  *
2716  * Uses the active RXON for channel, band, and characteristics (fat, high)
2717  * The power limit is taken from priv->user_txpower_limit.
2718  */
2719 int iwl4965_hw_reg_send_txpower(struct iwl_priv *priv)
2720 {
2721         struct iwl4965_txpowertable_cmd cmd = { 0 };
2722         int rc = 0;
2723         u8 band = 0;
2724         u8 is_fat = 0;
2725         u8 ctrl_chan_high = 0;
2726
2727         if (test_bit(STATUS_SCANNING, &priv->status)) {
2728                 /* If this gets hit a lot, switch it to a BUG() and catch
2729                  * the stack trace to find out who is calling this during
2730                  * a scan. */
2731                 IWL_WARNING("TX Power requested while scanning!\n");
2732                 return -EAGAIN;
2733         }
2734
2735         band = priv->band == IEEE80211_BAND_2GHZ;
2736
2737         is_fat =  is_fat_channel(priv->active_rxon.flags);
2738
2739         if (is_fat &&
2740             (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
2741                 ctrl_chan_high = 1;
2742
2743         cmd.band = band;
2744         cmd.channel = priv->active_rxon.channel;
2745
2746         rc = iwl4965_fill_txpower_tbl(priv, band,
2747                                 le16_to_cpu(priv->active_rxon.channel),
2748                                 is_fat, ctrl_chan_high, &cmd.tx_power);
2749         if (rc)
2750                 return rc;
2751
2752         rc = iwl4965_send_cmd_pdu(priv, REPLY_TX_PWR_TABLE_CMD, sizeof(cmd), &cmd);
2753         return rc;
2754 }
2755
2756 int iwl4965_hw_channel_switch(struct iwl_priv *priv, u16 channel)
2757 {
2758         int rc;
2759         u8 band = 0;
2760         u8 is_fat = 0;
2761         u8 ctrl_chan_high = 0;
2762         struct iwl4965_channel_switch_cmd cmd = { 0 };
2763         const struct iwl_channel_info *ch_info;
2764
2765         band = priv->band == IEEE80211_BAND_2GHZ;
2766
2767         ch_info = iwl_get_channel_info(priv, priv->band, channel);
2768
2769         is_fat = is_fat_channel(priv->staging_rxon.flags);
2770
2771         if (is_fat &&
2772             (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
2773                 ctrl_chan_high = 1;
2774
2775         cmd.band = band;
2776         cmd.expect_beacon = 0;
2777         cmd.channel = cpu_to_le16(channel);
2778         cmd.rxon_flags = priv->active_rxon.flags;
2779         cmd.rxon_filter_flags = priv->active_rxon.filter_flags;
2780         cmd.switch_time = cpu_to_le32(priv->ucode_beacon_time);
2781         if (ch_info)
2782                 cmd.expect_beacon = is_channel_radar(ch_info);
2783         else
2784                 cmd.expect_beacon = 1;
2785
2786         rc = iwl4965_fill_txpower_tbl(priv, band, channel, is_fat,
2787                                       ctrl_chan_high, &cmd.tx_power);
2788         if (rc) {
2789                 IWL_DEBUG_11H("error:%d  fill txpower_tbl\n", rc);
2790                 return rc;
2791         }
2792
2793         rc = iwl4965_send_cmd_pdu(priv, REPLY_CHANNEL_SWITCH, sizeof(cmd), &cmd);
2794         return rc;
2795 }
2796
2797 #define RTS_HCCA_RETRY_LIMIT            3
2798 #define RTS_DFAULT_RETRY_LIMIT          60
2799
2800 void iwl4965_hw_build_tx_cmd_rate(struct iwl_priv *priv,
2801                               struct iwl4965_cmd *cmd,
2802                               struct ieee80211_tx_control *ctrl,
2803                               struct ieee80211_hdr *hdr, int sta_id,
2804                               int is_hcca)
2805 {
2806         struct iwl4965_tx_cmd *tx = &cmd->cmd.tx;
2807         u8 rts_retry_limit = 0;
2808         u8 data_retry_limit = 0;
2809         u16 fc = le16_to_cpu(hdr->frame_control);
2810         u8 rate_plcp;
2811         u16 rate_flags = 0;
2812         int rate_idx = min(ctrl->tx_rate->hw_value & 0xffff, IWL_RATE_COUNT - 1);
2813
2814         rate_plcp = iwl4965_rates[rate_idx].plcp;
2815
2816         rts_retry_limit = (is_hcca) ?
2817             RTS_HCCA_RETRY_LIMIT : RTS_DFAULT_RETRY_LIMIT;
2818
2819         if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
2820                 rate_flags |= RATE_MCS_CCK_MSK;
2821
2822
2823         if (ieee80211_is_probe_response(fc)) {
2824                 data_retry_limit = 3;
2825                 if (data_retry_limit < rts_retry_limit)
2826                         rts_retry_limit = data_retry_limit;
2827         } else
2828                 data_retry_limit = IWL_DEFAULT_TX_RETRY;
2829
2830         if (priv->data_retry_limit != -1)
2831                 data_retry_limit = priv->data_retry_limit;
2832
2833
2834         if (ieee80211_is_data(fc)) {
2835                 tx->initial_rate_index = 0;
2836                 tx->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
2837         } else {
2838                 switch (fc & IEEE80211_FCTL_STYPE) {
2839                 case IEEE80211_STYPE_AUTH:
2840                 case IEEE80211_STYPE_DEAUTH:
2841                 case IEEE80211_STYPE_ASSOC_REQ:
2842                 case IEEE80211_STYPE_REASSOC_REQ:
2843                         if (tx->tx_flags & TX_CMD_FLG_RTS_MSK) {
2844                                 tx->tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2845                                 tx->tx_flags |= TX_CMD_FLG_CTS_MSK;
2846                         }
2847                         break;
2848                 default:
2849                         break;
2850                 }
2851
2852                 /* Alternate between antenna A and B for successive frames */
2853                 if (priv->use_ant_b_for_management_frame) {
2854                         priv->use_ant_b_for_management_frame = 0;
2855                         rate_flags |= RATE_MCS_ANT_B_MSK;
2856                 } else {
2857                         priv->use_ant_b_for_management_frame = 1;
2858                         rate_flags |= RATE_MCS_ANT_A_MSK;
2859                 }
2860         }
2861
2862         tx->rts_retry_limit = rts_retry_limit;
2863         tx->data_retry_limit = data_retry_limit;
2864         tx->rate_n_flags = iwl4965_hw_set_rate_n_flags(rate_plcp, rate_flags);
2865 }
2866
2867 int iwl4965_hw_get_rx_read(struct iwl_priv *priv)
2868 {
2869         struct iwl4965_shared *shared_data = priv->hw_setting.shared_virt;
2870
2871         return IWL_GET_BITS(*shared_data, rb_closed_stts_rb_num);
2872 }
2873
2874 int iwl4965_hw_get_temperature(struct iwl_priv *priv)
2875 {
2876         return priv->temperature;
2877 }
2878
2879 unsigned int iwl4965_hw_get_beacon_cmd(struct iwl_priv *priv,
2880                           struct iwl4965_frame *frame, u8 rate)
2881 {
2882         struct iwl4965_tx_beacon_cmd *tx_beacon_cmd;
2883         unsigned int frame_size;
2884
2885         tx_beacon_cmd = &frame->u.beacon;
2886         memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
2887
2888         tx_beacon_cmd->tx.sta_id = priv->hw_setting.bcast_sta_id;
2889         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2890
2891         frame_size = iwl4965_fill_beacon_frame(priv,
2892                                 tx_beacon_cmd->frame,
2893                                 iwl4965_broadcast_addr,
2894                                 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
2895
2896         BUG_ON(frame_size > MAX_MPDU_SIZE);
2897         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
2898
2899         if ((rate == IWL_RATE_1M_PLCP) || (rate >= IWL_RATE_2M_PLCP))
2900                 tx_beacon_cmd->tx.rate_n_flags =
2901                         iwl4965_hw_set_rate_n_flags(rate, RATE_MCS_CCK_MSK);
2902         else
2903                 tx_beacon_cmd->tx.rate_n_flags =
2904                         iwl4965_hw_set_rate_n_flags(rate, 0);
2905
2906         tx_beacon_cmd->tx.tx_flags = (TX_CMD_FLG_SEQ_CTL_MSK |
2907                                 TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK);
2908         return (sizeof(*tx_beacon_cmd) + frame_size);
2909 }
2910
2911 /*
2912  * Tell 4965 where to find circular buffer of Tx Frame Descriptors for
2913  * given Tx queue, and enable the DMA channel used for that queue.
2914  *
2915  * 4965 supports up to 16 Tx queues in DRAM, mapped to up to 8 Tx DMA
2916  * channels supported in hardware.
2917  */
2918 int iwl4965_hw_tx_queue_init(struct iwl_priv *priv, struct iwl4965_tx_queue *txq)
2919 {
2920         int rc;
2921         unsigned long flags;
2922         int txq_id = txq->q.id;
2923
2924         spin_lock_irqsave(&priv->lock, flags);
2925         rc = iwl4965_grab_nic_access(priv);
2926         if (rc) {
2927                 spin_unlock_irqrestore(&priv->lock, flags);
2928                 return rc;
2929         }
2930
2931         /* Circular buffer (TFD queue in DRAM) physical base address */
2932         iwl4965_write_direct32(priv, FH_MEM_CBBC_QUEUE(txq_id),
2933                              txq->q.dma_addr >> 8);
2934
2935         /* Enable DMA channel, using same id as for TFD queue */
2936         iwl4965_write_direct32(
2937                 priv, IWL_FH_TCSR_CHNL_TX_CONFIG_REG(txq_id),
2938                 IWL_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE |
2939                 IWL_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE_VAL);
2940         iwl4965_release_nic_access(priv);
2941         spin_unlock_irqrestore(&priv->lock, flags);
2942
2943         return 0;
2944 }
2945
2946 int iwl4965_hw_txq_attach_buf_to_tfd(struct iwl_priv *priv, void *ptr,
2947                                  dma_addr_t addr, u16 len)
2948 {
2949         int index, is_odd;
2950         struct iwl4965_tfd_frame *tfd = ptr;
2951         u32 num_tbs = IWL_GET_BITS(*tfd, num_tbs);
2952
2953         /* Each TFD can point to a maximum 20 Tx buffers */
2954         if ((num_tbs >= MAX_NUM_OF_TBS) || (num_tbs < 0)) {
2955                 IWL_ERROR("Error can not send more than %d chunks\n",
2956                           MAX_NUM_OF_TBS);
2957                 return -EINVAL;
2958         }
2959
2960         index = num_tbs / 2;
2961         is_odd = num_tbs & 0x1;
2962
2963         if (!is_odd) {
2964                 tfd->pa[index].tb1_addr = cpu_to_le32(addr);
2965                 IWL_SET_BITS(tfd->pa[index], tb1_addr_hi,
2966                              iwl_get_dma_hi_address(addr));
2967                 IWL_SET_BITS(tfd->pa[index], tb1_len, len);
2968         } else {
2969                 IWL_SET_BITS(tfd->pa[index], tb2_addr_lo16,
2970                              (u32) (addr & 0xffff));
2971                 IWL_SET_BITS(tfd->pa[index], tb2_addr_hi20, addr >> 16);
2972                 IWL_SET_BITS(tfd->pa[index], tb2_len, len);
2973         }
2974
2975         IWL_SET_BITS(*tfd, num_tbs, num_tbs + 1);
2976
2977         return 0;
2978 }
2979
2980 static void iwl4965_hw_card_show_info(struct iwl_priv *priv)
2981 {
2982         u16 hw_version = priv->eeprom.board_revision_4965;
2983
2984         IWL_DEBUG_INFO("4965ABGN HW Version %u.%u.%u\n",
2985                        ((hw_version >> 8) & 0x0F),
2986                        ((hw_version >> 8) >> 4), (hw_version & 0x00FF));
2987
2988         IWL_DEBUG_INFO("4965ABGN PBA Number %.16s\n",
2989                        priv->eeprom.board_pba_number_4965);
2990 }
2991
2992 #define IWL_TX_CRC_SIZE         4
2993 #define IWL_TX_DELIMITER_SIZE   4
2994
2995 /**
2996  * iwl4965_tx_queue_update_wr_ptr - Set up entry in Tx byte-count array
2997  */
2998 int iwl4965_tx_queue_update_wr_ptr(struct iwl_priv *priv,
2999                                    struct iwl4965_tx_queue *txq, u16 byte_cnt)
3000 {
3001         int len;
3002         int txq_id = txq->q.id;
3003         struct iwl4965_shared *shared_data = priv->hw_setting.shared_virt;
3004
3005         if (txq->need_update == 0)
3006                 return 0;
3007
3008         len = byte_cnt + IWL_TX_CRC_SIZE + IWL_TX_DELIMITER_SIZE;
3009
3010         /* Set up byte count within first 256 entries */
3011         IWL_SET_BITS16(shared_data->queues_byte_cnt_tbls[txq_id].
3012                        tfd_offset[txq->q.write_ptr], byte_cnt, len);
3013
3014         /* If within first 64 entries, duplicate at end */
3015         if (txq->q.write_ptr < IWL4965_MAX_WIN_SIZE)
3016                 IWL_SET_BITS16(shared_data->queues_byte_cnt_tbls[txq_id].
3017                         tfd_offset[IWL4965_QUEUE_SIZE + txq->q.write_ptr],
3018                         byte_cnt, len);
3019
3020         return 0;
3021 }
3022
3023 /**
3024  * iwl4965_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
3025  *
3026  * Selects how many and which Rx receivers/antennas/chains to use.
3027  * This should not be used for scan command ... it puts data in wrong place.
3028  */
3029 void iwl4965_set_rxon_chain(struct iwl_priv *priv)
3030 {
3031         u8 is_single = is_single_stream(priv);
3032         u8 idle_state, rx_state;
3033
3034         priv->staging_rxon.rx_chain = 0;
3035         rx_state = idle_state = 3;
3036
3037         /* Tell uCode which antennas are actually connected.
3038          * Before first association, we assume all antennas are connected.
3039          * Just after first association, iwl4965_noise_calibration()
3040          *    checks which antennas actually *are* connected. */
3041         priv->staging_rxon.rx_chain |=
3042             cpu_to_le16(priv->valid_antenna << RXON_RX_CHAIN_VALID_POS);
3043
3044         /* How many receivers should we use? */
3045         iwl4965_get_rx_chain_counter(priv, &idle_state, &rx_state);
3046         priv->staging_rxon.rx_chain |=
3047                 cpu_to_le16(rx_state << RXON_RX_CHAIN_MIMO_CNT_POS);
3048         priv->staging_rxon.rx_chain |=
3049                 cpu_to_le16(idle_state << RXON_RX_CHAIN_CNT_POS);
3050
3051         if (!is_single && (rx_state >= 2) &&
3052             !test_bit(STATUS_POWER_PMI, &priv->status))
3053                 priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
3054         else
3055                 priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
3056
3057         IWL_DEBUG_ASSOC("rx chain %X\n", priv->staging_rxon.rx_chain);
3058 }
3059
3060 /**
3061  * sign_extend - Sign extend a value using specified bit as sign-bit
3062  *
3063  * Example: sign_extend(9, 3) would return -7 as bit3 of 1001b is 1
3064  * and bit0..2 is 001b which when sign extended to 1111111111111001b is -7.
3065  *
3066  * @param oper value to sign extend
3067  * @param index 0 based bit index (0<=index<32) to sign bit
3068  */
3069 static s32 sign_extend(u32 oper, int index)
3070 {
3071         u8 shift = 31 - index;
3072
3073         return (s32)(oper << shift) >> shift;
3074 }
3075
3076 /**
3077  * iwl4965_get_temperature - return the calibrated temperature (in Kelvin)
3078  * @statistics: Provides the temperature reading from the uCode
3079  *
3080  * A return of <0 indicates bogus data in the statistics
3081  */
3082 int iwl4965_get_temperature(const struct iwl_priv *priv)
3083 {
3084         s32 temperature;
3085         s32 vt;
3086         s32 R1, R2, R3;
3087         u32 R4;
3088
3089         if (test_bit(STATUS_TEMPERATURE, &priv->status) &&
3090                 (priv->statistics.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK)) {
3091                 IWL_DEBUG_TEMP("Running FAT temperature calibration\n");
3092                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[1]);
3093                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[1]);
3094                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[1]);
3095                 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[1]);
3096         } else {
3097                 IWL_DEBUG_TEMP("Running temperature calibration\n");
3098                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[0]);
3099                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[0]);
3100                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[0]);
3101                 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[0]);
3102         }
3103
3104         /*
3105          * Temperature is only 23 bits, so sign extend out to 32.
3106          *
3107          * NOTE If we haven't received a statistics notification yet
3108          * with an updated temperature, use R4 provided to us in the
3109          * "initialize" ALIVE response.
3110          */
3111         if (!test_bit(STATUS_TEMPERATURE, &priv->status))
3112                 vt = sign_extend(R4, 23);
3113         else
3114                 vt = sign_extend(
3115                         le32_to_cpu(priv->statistics.general.temperature), 23);
3116
3117         IWL_DEBUG_TEMP("Calib values R[1-3]: %d %d %d R4: %d\n",
3118                        R1, R2, R3, vt);
3119
3120         if (R3 == R1) {
3121                 IWL_ERROR("Calibration conflict R1 == R3\n");
3122                 return -1;
3123         }
3124
3125         /* Calculate temperature in degrees Kelvin, adjust by 97%.
3126          * Add offset to center the adjustment around 0 degrees Centigrade. */
3127         temperature = TEMPERATURE_CALIB_A_VAL * (vt - R2);
3128         temperature /= (R3 - R1);
3129         temperature = (temperature * 97) / 100 +
3130             TEMPERATURE_CALIB_KELVIN_OFFSET;
3131
3132         IWL_DEBUG_TEMP("Calibrated temperature: %dK, %dC\n", temperature,
3133             KELVIN_TO_CELSIUS(temperature));
3134
3135         return temperature;
3136 }
3137
3138 /* Adjust Txpower only if temperature variance is greater than threshold. */
3139 #define IWL_TEMPERATURE_THRESHOLD   3
3140
3141 /**
3142  * iwl4965_is_temp_calib_needed - determines if new calibration is needed
3143  *
3144  * If the temperature changed has changed sufficiently, then a recalibration
3145  * is needed.
3146  *
3147  * Assumes caller will replace priv->last_temperature once calibration
3148  * executed.
3149  */
3150 static int iwl4965_is_temp_calib_needed(struct iwl_priv *priv)
3151 {
3152         int temp_diff;
3153
3154         if (!test_bit(STATUS_STATISTICS, &priv->status)) {
3155                 IWL_DEBUG_TEMP("Temperature not updated -- no statistics.\n");
3156                 return 0;
3157         }
3158
3159         temp_diff = priv->temperature - priv->last_temperature;
3160
3161         /* get absolute value */
3162         if (temp_diff < 0) {
3163                 IWL_DEBUG_POWER("Getting cooler, delta %d, \n", temp_diff);
3164                 temp_diff = -temp_diff;
3165         } else if (temp_diff == 0)
3166                 IWL_DEBUG_POWER("Same temp, \n");
3167         else
3168                 IWL_DEBUG_POWER("Getting warmer, delta %d, \n", temp_diff);
3169
3170         if (temp_diff < IWL_TEMPERATURE_THRESHOLD) {
3171                 IWL_DEBUG_POWER("Thermal txpower calib not needed\n");
3172                 return 0;
3173         }
3174
3175         IWL_DEBUG_POWER("Thermal txpower calib needed\n");
3176
3177         return 1;
3178 }
3179
3180 /* Calculate noise level, based on measurements during network silence just
3181  *   before arriving beacon.  This measurement can be done only if we know
3182  *   exactly when to expect beacons, therefore only when we're associated. */
3183 static void iwl4965_rx_calc_noise(struct iwl_priv *priv)
3184 {
3185         struct statistics_rx_non_phy *rx_info
3186                                 = &(priv->statistics.rx.general);
3187         int num_active_rx = 0;
3188         int total_silence = 0;
3189         int bcn_silence_a =
3190                 le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER;
3191         int bcn_silence_b =
3192                 le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER;
3193         int bcn_silence_c =
3194                 le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER;
3195
3196         if (bcn_silence_a) {
3197                 total_silence += bcn_silence_a;
3198                 num_active_rx++;
3199         }
3200         if (bcn_silence_b) {
3201                 total_silence += bcn_silence_b;
3202                 num_active_rx++;
3203         }
3204         if (bcn_silence_c) {
3205                 total_silence += bcn_silence_c;
3206                 num_active_rx++;
3207         }
3208
3209         /* Average among active antennas */
3210         if (num_active_rx)
3211                 priv->last_rx_noise = (total_silence / num_active_rx) - 107;
3212         else
3213                 priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
3214
3215         IWL_DEBUG_CALIB("inband silence a %u, b %u, c %u, dBm %d\n",
3216                         bcn_silence_a, bcn_silence_b, bcn_silence_c,
3217                         priv->last_rx_noise);
3218 }
3219
3220 void iwl4965_hw_rx_statistics(struct iwl_priv *priv, struct iwl4965_rx_mem_buffer *rxb)
3221 {
3222         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3223         int change;
3224         s32 temp;
3225
3226         IWL_DEBUG_RX("Statistics notification received (%d vs %d).\n",
3227                      (int)sizeof(priv->statistics), pkt->len);
3228
3229         change = ((priv->statistics.general.temperature !=
3230                    pkt->u.stats.general.temperature) ||
3231                   ((priv->statistics.flag &
3232                     STATISTICS_REPLY_FLG_FAT_MODE_MSK) !=
3233                    (pkt->u.stats.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK)));
3234
3235         memcpy(&priv->statistics, &pkt->u.stats, sizeof(priv->statistics));
3236
3237         set_bit(STATUS_STATISTICS, &priv->status);
3238
3239         /* Reschedule the statistics timer to occur in
3240          * REG_RECALIB_PERIOD seconds to ensure we get a
3241          * thermal update even if the uCode doesn't give
3242          * us one */
3243         mod_timer(&priv->statistics_periodic, jiffies +
3244                   msecs_to_jiffies(REG_RECALIB_PERIOD * 1000));
3245
3246         if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
3247             (pkt->hdr.cmd == STATISTICS_NOTIFICATION)) {
3248                 iwl4965_rx_calc_noise(priv);
3249 #ifdef CONFIG_IWL4965_SENSITIVITY
3250                 queue_work(priv->workqueue, &priv->sensitivity_work);
3251 #endif
3252         }
3253
3254         /* If the hardware hasn't reported a change in
3255          * temperature then don't bother computing a
3256          * calibrated temperature value */
3257         if (!change)
3258                 return;
3259
3260         temp = iwl4965_get_temperature(priv);
3261         if (temp < 0)
3262                 return;
3263
3264         if (priv->temperature != temp) {
3265                 if (priv->temperature)
3266                         IWL_DEBUG_TEMP("Temperature changed "
3267                                        "from %dC to %dC\n",
3268                                        KELVIN_TO_CELSIUS(priv->temperature),
3269                                        KELVIN_TO_CELSIUS(temp));
3270                 else
3271                         IWL_DEBUG_TEMP("Temperature "
3272                                        "initialized to %dC\n",
3273                                        KELVIN_TO_CELSIUS(temp));
3274         }
3275
3276         priv->temperature = temp;
3277         set_bit(STATUS_TEMPERATURE, &priv->status);
3278
3279         if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
3280                      iwl4965_is_temp_calib_needed(priv))
3281                 queue_work(priv->workqueue, &priv->txpower_work);
3282 }
3283
3284 static void iwl4965_add_radiotap(struct iwl_priv *priv,
3285                                  struct sk_buff *skb,
3286                                  struct iwl4965_rx_phy_res *rx_start,
3287                                  struct ieee80211_rx_status *stats,
3288                                  u32 ampdu_status)
3289 {
3290         s8 signal = stats->ssi;
3291         s8 noise = 0;
3292         int rate = stats->rate_idx;
3293         u64 tsf = stats->mactime;
3294         __le16 phy_flags_hw = rx_start->phy_flags;
3295         struct iwl4965_rt_rx_hdr {
3296                 struct ieee80211_radiotap_header rt_hdr;
3297                 __le64 rt_tsf;          /* TSF */
3298                 u8 rt_flags;            /* radiotap packet flags */
3299                 u8 rt_rate;             /* rate in 500kb/s */
3300                 __le16 rt_channelMHz;   /* channel in MHz */
3301                 __le16 rt_chbitmask;    /* channel bitfield */
3302                 s8 rt_dbmsignal;        /* signal in dBm, kluged to signed */
3303                 s8 rt_dbmnoise;
3304                 u8 rt_antenna;          /* antenna number */
3305         } __attribute__ ((packed)) *iwl4965_rt;
3306
3307         /* TODO: We won't have enough headroom for HT frames. Fix it later. */
3308         if (skb_headroom(skb) < sizeof(*iwl4965_rt)) {
3309                 if (net_ratelimit())
3310                         printk(KERN_ERR "not enough headroom [%d] for "
3311                                "radiotap head [%zd]\n",
3312                                skb_headroom(skb), sizeof(*iwl4965_rt));
3313                 return;
3314         }
3315
3316         /* put radiotap header in front of 802.11 header and data */
3317         iwl4965_rt = (void *)skb_push(skb, sizeof(*iwl4965_rt));
3318
3319         /* initialise radiotap header */
3320         iwl4965_rt->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
3321         iwl4965_rt->rt_hdr.it_pad = 0;
3322
3323         /* total header + data */
3324         put_unaligned(cpu_to_le16(sizeof(*iwl4965_rt)),
3325                       &iwl4965_rt->rt_hdr.it_len);
3326
3327         /* Indicate all the fields we add to the radiotap header */
3328         put_unaligned(cpu_to_le32((1 << IEEE80211_RADIOTAP_TSFT) |
3329                                   (1 << IEEE80211_RADIOTAP_FLAGS) |
3330                                   (1 << IEEE80211_RADIOTAP_RATE) |
3331                                   (1 << IEEE80211_RADIOTAP_CHANNEL) |
3332                                   (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL) |
3333                                   (1 << IEEE80211_RADIOTAP_DBM_ANTNOISE) |
3334                                   (1 << IEEE80211_RADIOTAP_ANTENNA)),
3335                       &iwl4965_rt->rt_hdr.it_present);
3336
3337         /* Zero the flags, we'll add to them as we go */
3338         iwl4965_rt->rt_flags = 0;
3339
3340         put_unaligned(cpu_to_le64(tsf), &iwl4965_rt->rt_tsf);
3341
3342         iwl4965_rt->rt_dbmsignal = signal;
3343         iwl4965_rt->rt_dbmnoise = noise;
3344
3345         /* Convert the channel frequency and set the flags */
3346         put_unaligned(cpu_to_le16(stats->freq), &iwl4965_rt->rt_channelMHz);
3347         if (!(phy_flags_hw & RX_RES_PHY_FLAGS_BAND_24_MSK))
3348                 put_unaligned(cpu_to_le16(IEEE80211_CHAN_OFDM |
3349                                           IEEE80211_CHAN_5GHZ),
3350                               &iwl4965_rt->rt_chbitmask);
3351         else if (phy_flags_hw & RX_RES_PHY_FLAGS_MOD_CCK_MSK)
3352                 put_unaligned(cpu_to_le16(IEEE80211_CHAN_CCK |
3353                                           IEEE80211_CHAN_2GHZ),
3354                               &iwl4965_rt->rt_chbitmask);
3355         else    /* 802.11g */
3356                 put_unaligned(cpu_to_le16(IEEE80211_CHAN_OFDM |
3357                                           IEEE80211_CHAN_2GHZ),
3358                               &iwl4965_rt->rt_chbitmask);
3359
3360         if (rate == -1)
3361                 iwl4965_rt->rt_rate = 0;
3362         else
3363                 iwl4965_rt->rt_rate = iwl4965_rates[rate].ieee;
3364
3365         /*
3366          * "antenna number"
3367          *
3368          * It seems that the antenna field in the phy flags value
3369          * is actually a bitfield. This is undefined by radiotap,
3370          * it wants an actual antenna number but I always get "7"
3371          * for most legacy frames I receive indicating that the
3372          * same frame was received on all three RX chains.
3373          *
3374          * I think this field should be removed in favour of a
3375          * new 802.11n radiotap field "RX chains" that is defined
3376          * as a bitmask.
3377          */
3378         iwl4965_rt->rt_antenna =
3379                 le16_to_cpu(phy_flags_hw & RX_RES_PHY_FLAGS_ANTENNA_MSK) >> 4;
3380
3381         /* set the preamble flag if appropriate */
3382         if (phy_flags_hw & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
3383                 iwl4965_rt->rt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;
3384
3385         stats->flag |= RX_FLAG_RADIOTAP;
3386 }
3387
3388 static void iwl_update_rx_stats(struct iwl_priv *priv, u16 fc, u16 len)
3389 {
3390         /* 0 - mgmt, 1 - cnt, 2 - data */
3391         int idx = (fc & IEEE80211_FCTL_FTYPE) >> 2;
3392         priv->rx_stats[idx].cnt++;
3393         priv->rx_stats[idx].bytes += len;
3394 }
3395
3396 static u32 iwl4965_translate_rx_status(u32 decrypt_in)
3397 {
3398         u32 decrypt_out = 0;
3399
3400         if ((decrypt_in & RX_RES_STATUS_STATION_FOUND) ==
3401                                         RX_RES_STATUS_STATION_FOUND)
3402                 decrypt_out |= (RX_RES_STATUS_STATION_FOUND |
3403                                 RX_RES_STATUS_NO_STATION_INFO_MISMATCH);
3404
3405         decrypt_out |= (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK);
3406
3407         /* packet was not encrypted */
3408         if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
3409                                         RX_RES_STATUS_SEC_TYPE_NONE)
3410                 return decrypt_out;
3411
3412         /* packet was encrypted with unknown alg */
3413         if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
3414                                         RX_RES_STATUS_SEC_TYPE_ERR)
3415                 return decrypt_out;
3416
3417         /* decryption was not done in HW */
3418         if ((decrypt_in & RX_MPDU_RES_STATUS_DEC_DONE_MSK) !=
3419                                         RX_MPDU_RES_STATUS_DEC_DONE_MSK)
3420                 return decrypt_out;
3421
3422         switch (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) {
3423
3424         case RX_RES_STATUS_SEC_TYPE_CCMP:
3425                 /* alg is CCM: check MIC only */
3426                 if (!(decrypt_in & RX_MPDU_RES_STATUS_MIC_OK))
3427                         /* Bad MIC */
3428                         decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
3429                 else
3430                         decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
3431
3432                 break;
3433
3434         case RX_RES_STATUS_SEC_TYPE_TKIP:
3435                 if (!(decrypt_in & RX_MPDU_RES_STATUS_TTAK_OK)) {
3436                         /* Bad TTAK */
3437                         decrypt_out |= RX_RES_STATUS_BAD_KEY_TTAK;
3438                         break;
3439                 }
3440                 /* fall through if TTAK OK */
3441         default:
3442                 if (!(decrypt_in & RX_MPDU_RES_STATUS_ICV_OK))
3443                         decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
3444                 else
3445                         decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
3446                 break;
3447         };
3448
3449         IWL_DEBUG_RX("decrypt_in:0x%x  decrypt_out = 0x%x\n",
3450                                         decrypt_in, decrypt_out);
3451
3452         return decrypt_out;
3453 }
3454
3455 static void iwl4965_handle_data_packet(struct iwl_priv *priv, int is_data,
3456                                        int include_phy,
3457                                        struct iwl4965_rx_mem_buffer *rxb,
3458                                        struct ieee80211_rx_status *stats)
3459 {
3460         struct iwl4965_rx_packet *pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
3461         struct iwl4965_rx_phy_res *rx_start = (include_phy) ?
3462             (struct iwl4965_rx_phy_res *)&(pkt->u.raw[0]) : NULL;
3463         struct ieee80211_hdr *hdr;
3464         u16 len;
3465         __le32 *rx_end;
3466         unsigned int skblen;
3467         u32 ampdu_status;
3468         u32 ampdu_status_legacy;
3469
3470         if (!include_phy && priv->last_phy_res[0])
3471                 rx_start = (struct iwl4965_rx_phy_res *)&priv->last_phy_res[1];
3472
3473         if (!rx_start) {
3474                 IWL_ERROR("MPDU frame without a PHY data\n");
3475                 return;
3476         }
3477         if (include_phy) {
3478                 hdr = (struct ieee80211_hdr *)((u8 *) & rx_start[1] +
3479                                                rx_start->cfg_phy_cnt);
3480
3481                 len = le16_to_cpu(rx_start->byte_count);
3482
3483                 rx_end = (__le32 *) ((u8 *) & pkt->u.raw[0] +
3484                                   sizeof(struct iwl4965_rx_phy_res) +
3485                                   rx_start->cfg_phy_cnt + len);
3486
3487         } else {
3488                 struct iwl4965_rx_mpdu_res_start *amsdu =
3489                     (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw;
3490
3491                 hdr = (struct ieee80211_hdr *)(pkt->u.raw +
3492                                sizeof(struct iwl4965_rx_mpdu_res_start));
3493                 len =  le16_to_cpu(amsdu->byte_count);
3494                 rx_start->byte_count = amsdu->byte_count;
3495                 rx_end = (__le32 *) (((u8 *) hdr) + len);
3496         }
3497         if (len > priv->hw_setting.max_pkt_size || len < 16) {
3498                 IWL_WARNING("byte count out of range [16,4K] : %d\n", len);
3499                 return;
3500         }
3501
3502         ampdu_status = le32_to_cpu(*rx_end);
3503         skblen = ((u8 *) rx_end - (u8 *) & pkt->u.raw[0]) + sizeof(u32);
3504
3505         if (!include_phy) {
3506                 /* New status scheme, need to translate */
3507                 ampdu_status_legacy = ampdu_status;
3508                 ampdu_status = iwl4965_translate_rx_status(ampdu_status);
3509         }
3510
3511         /* start from MAC */
3512         skb_reserve(rxb->skb, (void *)hdr - (void *)pkt);
3513         skb_put(rxb->skb, len); /* end where data ends */
3514
3515         /* We only process data packets if the interface is open */
3516         if (unlikely(!priv->is_open)) {
3517                 IWL_DEBUG_DROP_LIMIT
3518                     ("Dropping packet while interface is not open.\n");
3519                 return;
3520         }
3521
3522         stats->flag = 0;
3523         hdr = (struct ieee80211_hdr *)rxb->skb->data;
3524
3525         if (iwl4965_mod_params.hw_crypto)
3526                 iwl4965_set_decrypted_flag(priv, rxb->skb, ampdu_status, stats);
3527
3528         if (priv->add_radiotap)
3529                 iwl4965_add_radiotap(priv, rxb->skb, rx_start, stats, ampdu_status);
3530
3531         iwl_update_rx_stats(priv, le16_to_cpu(hdr->frame_control), len);
3532         ieee80211_rx_irqsafe(priv->hw, rxb->skb, stats);
3533         priv->alloc_rxb_skb--;
3534         rxb->skb = NULL;
3535 #ifdef LED
3536         priv->led_packets += len;
3537         iwl4965_setup_activity_timer(priv);
3538 #endif
3539 }
3540
3541 /* Calc max signal level (dBm) among 3 possible receivers */
3542 static int iwl4965_calc_rssi(struct iwl4965_rx_phy_res *rx_resp)
3543 {
3544         /* data from PHY/DSP regarding signal strength, etc.,
3545          *   contents are always there, not configurable by host.  */
3546         struct iwl4965_rx_non_cfg_phy *ncphy =
3547             (struct iwl4965_rx_non_cfg_phy *)rx_resp->non_cfg_phy;
3548         u32 agc = (le16_to_cpu(ncphy->agc_info) & IWL_AGC_DB_MASK)
3549                         >> IWL_AGC_DB_POS;
3550
3551         u32 valid_antennae =
3552             (le16_to_cpu(rx_resp->phy_flags) & RX_PHY_FLAGS_ANTENNAE_MASK)
3553                         >> RX_PHY_FLAGS_ANTENNAE_OFFSET;
3554         u8 max_rssi = 0;
3555         u32 i;
3556
3557         /* Find max rssi among 3 possible receivers.
3558          * These values are measured by the digital signal processor (DSP).
3559          * They should stay fairly constant even as the signal strength varies,
3560          *   if the radio's automatic gain control (AGC) is working right.
3561          * AGC value (see below) will provide the "interesting" info. */
3562         for (i = 0; i < 3; i++)
3563                 if (valid_antennae & (1 << i))
3564                         max_rssi = max(ncphy->rssi_info[i << 1], max_rssi);
3565
3566         IWL_DEBUG_STATS("Rssi In A %d B %d C %d Max %d AGC dB %d\n",
3567                 ncphy->rssi_info[0], ncphy->rssi_info[2], ncphy->rssi_info[4],
3568                 max_rssi, agc);
3569
3570         /* dBm = max_rssi dB - agc dB - constant.
3571          * Higher AGC (higher radio gain) means lower signal. */
3572         return (max_rssi - agc - IWL_RSSI_OFFSET);
3573 }
3574
3575 #ifdef CONFIG_IWL4965_HT
3576
3577 /* Parsed Information Elements */
3578 struct ieee802_11_elems {
3579         u8 *ds_params;
3580         u8 ds_params_len;
3581         u8 *tim;
3582         u8 tim_len;
3583         u8 *ibss_params;
3584         u8 ibss_params_len;
3585         u8 *erp_info;
3586         u8 erp_info_len;
3587         u8 *ht_cap_param;
3588         u8 ht_cap_param_len;
3589         u8 *ht_extra_param;
3590         u8 ht_extra_param_len;
3591 };
3592
3593 static int parse_elems(u8 *start, size_t len, struct ieee802_11_elems *elems)
3594 {
3595         size_t left = len;
3596         u8 *pos = start;
3597         int unknown = 0;
3598
3599         memset(elems, 0, sizeof(*elems));
3600
3601         while (left >= 2) {
3602                 u8 id, elen;
3603
3604                 id = *pos++;
3605                 elen = *pos++;
3606                 left -= 2;
3607
3608                 if (elen > left)
3609                         return -1;
3610
3611                 switch (id) {
3612                 case WLAN_EID_DS_PARAMS:
3613                         elems->ds_params = pos;
3614                         elems->ds_params_len = elen;
3615                         break;
3616                 case WLAN_EID_TIM:
3617                         elems->tim = pos;
3618                         elems->tim_len = elen;
3619                         break;
3620                 case WLAN_EID_IBSS_PARAMS:
3621                         elems->ibss_params = pos;
3622                         elems->ibss_params_len = elen;
3623                         break;
3624                 case WLAN_EID_ERP_INFO:
3625                         elems->erp_info = pos;
3626                         elems->erp_info_len = elen;
3627                         break;
3628                 case WLAN_EID_HT_CAPABILITY:
3629                         elems->ht_cap_param = pos;
3630                         elems->ht_cap_param_len = elen;
3631                         break;
3632                 case WLAN_EID_HT_EXTRA_INFO:
3633                         elems->ht_extra_param = pos;
3634                         elems->ht_extra_param_len = elen;
3635                         break;
3636                 default:
3637                         unknown++;
3638                         break;
3639                 }
3640
3641                 left -= elen;
3642                 pos += elen;
3643         }
3644
3645         return 0;
3646 }
3647
3648 void iwl4965_init_ht_hw_capab(struct ieee80211_ht_info *ht_info,
3649                               enum ieee80211_band band)
3650 {
3651         ht_info->cap = 0;
3652         memset(ht_info->supp_mcs_set, 0, 16);
3653
3654         ht_info->ht_supported = 1;
3655
3656         if (band == IEEE80211_BAND_5GHZ) {
3657                 ht_info->cap |= (u16)IEEE80211_HT_CAP_SUP_WIDTH;
3658                 ht_info->cap |= (u16)IEEE80211_HT_CAP_SGI_40;
3659                 ht_info->supp_mcs_set[4] = 0x01;
3660         }
3661         ht_info->cap |= (u16)IEEE80211_HT_CAP_GRN_FLD;
3662         ht_info->cap |= (u16)IEEE80211_HT_CAP_SGI_20;
3663         ht_info->cap |= (u16)(IEEE80211_HT_CAP_MIMO_PS &
3664                              (IWL_MIMO_PS_NONE << 2));
3665         if (iwl4965_mod_params.amsdu_size_8K) {
3666                 printk(KERN_DEBUG "iwl4965 in A-MSDU 8K support mode\n");
3667                 ht_info->cap |= (u16)IEEE80211_HT_CAP_MAX_AMSDU;
3668         }
3669
3670         ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
3671         ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
3672
3673         ht_info->supp_mcs_set[0] = 0xFF;
3674         ht_info->supp_mcs_set[1] = 0xFF;
3675 }
3676 #endif /* CONFIG_IWL4965_HT */
3677
3678 static void iwl4965_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
3679 {
3680         unsigned long flags;
3681
3682         spin_lock_irqsave(&priv->sta_lock, flags);
3683         priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
3684         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
3685         priv->stations[sta_id].sta.sta.modify_mask = 0;
3686         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3687         spin_unlock_irqrestore(&priv->sta_lock, flags);
3688
3689         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
3690 }
3691
3692 static void iwl4965_update_ps_mode(struct iwl_priv *priv, u16 ps_bit, u8 *addr)
3693 {
3694         /* FIXME: need locking over ps_status ??? */
3695         u8 sta_id = iwl4965_hw_find_station(priv, addr);
3696
3697         if (sta_id != IWL_INVALID_STATION) {
3698                 u8 sta_awake = priv->stations[sta_id].
3699                                 ps_status == STA_PS_STATUS_WAKE;
3700
3701                 if (sta_awake && ps_bit)
3702                         priv->stations[sta_id].ps_status = STA_PS_STATUS_SLEEP;
3703                 else if (!sta_awake && !ps_bit) {
3704                         iwl4965_sta_modify_ps_wake(priv, sta_id);
3705                         priv->stations[sta_id].ps_status = STA_PS_STATUS_WAKE;
3706                 }
3707         }
3708 }
3709 #ifdef CONFIG_IWLWIFI_DEBUG
3710
3711 /**
3712  * iwl4965_dbg_report_frame - dump frame to syslog during debug sessions
3713  *
3714  * You may hack this function to show different aspects of received frames,
3715  * including selective frame dumps.
3716  * group100 parameter selects whether to show 1 out of 100 good frames.
3717  *
3718  * TODO:  This was originally written for 3945, need to audit for
3719  *        proper operation with 4965.
3720  */
3721 static void iwl4965_dbg_report_frame(struct iwl_priv *priv,
3722                       struct iwl4965_rx_packet *pkt,
3723                       struct ieee80211_hdr *header, int group100)
3724 {
3725         u32 to_us;
3726         u32 print_summary = 0;
3727         u32 print_dump = 0;     /* set to 1 to dump all frames' contents */
3728         u32 hundred = 0;
3729         u32 dataframe = 0;
3730         u16 fc;
3731         u16 seq_ctl;
3732         u16 channel;
3733         u16 phy_flags;
3734         int rate_sym;
3735         u16 length;
3736         u16 status;
3737         u16 bcn_tmr;
3738         u32 tsf_low;
3739         u64 tsf;
3740         u8 rssi;
3741         u8 agc;
3742         u16 sig_avg;
3743         u16 noise_diff;
3744         struct iwl4965_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
3745         struct iwl4965_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
3746         struct iwl4965_rx_frame_end *rx_end = IWL_RX_END(pkt);
3747         u8 *data = IWL_RX_DATA(pkt);
3748
3749         if (likely(!(iwl_debug_level & IWL_DL_RX)))
3750                 return;
3751
3752         /* MAC header */
3753         fc = le16_to_cpu(header->frame_control);
3754         seq_ctl = le16_to_cpu(header->seq_ctrl);
3755
3756         /* metadata */
3757         channel = le16_to_cpu(rx_hdr->channel);
3758         phy_flags = le16_to_cpu(rx_hdr->phy_flags);
3759         rate_sym = rx_hdr->rate;
3760         length = le16_to_cpu(rx_hdr->len);
3761
3762         /* end-of-frame status and timestamp */
3763         status = le32_to_cpu(rx_end->status);
3764         bcn_tmr = le32_to_cpu(rx_end->beacon_timestamp);
3765         tsf_low = le64_to_cpu(rx_end->timestamp) & 0x0ffffffff;
3766         tsf = le64_to_cpu(rx_end->timestamp);
3767
3768         /* signal statistics */
3769         rssi = rx_stats->rssi;
3770         agc = rx_stats->agc;
3771         sig_avg = le16_to_cpu(rx_stats->sig_avg);
3772         noise_diff = le16_to_cpu(rx_stats->noise_diff);
3773
3774         to_us = !compare_ether_addr(header->addr1, priv->mac_addr);
3775
3776         /* if data frame is to us and all is good,
3777          *   (optionally) print summary for only 1 out of every 100 */
3778         if (to_us && (fc & ~IEEE80211_FCTL_PROTECTED) ==
3779             (IEEE80211_FCTL_FROMDS | IEEE80211_FTYPE_DATA)) {
3780                 dataframe = 1;
3781                 if (!group100)
3782                         print_summary = 1;      /* print each frame */
3783                 else if (priv->framecnt_to_us < 100) {
3784                         priv->framecnt_to_us++;
3785                         print_summary = 0;
3786                 } else {
3787                         priv->framecnt_to_us = 0;
3788                         print_summary = 1;
3789                         hundred = 1;
3790                 }
3791         } else {
3792                 /* print summary for all other frames */
3793                 print_summary = 1;
3794         }
3795
3796         if (print_summary) {
3797                 char *title;
3798                 int rate_idx;
3799                 u32 bitrate;
3800
3801                 if (hundred)
3802                         title = "100Frames";
3803                 else if (fc & IEEE80211_FCTL_RETRY)
3804                         title = "Retry";
3805                 else if (ieee80211_is_assoc_response(fc))
3806                         title = "AscRsp";
3807                 else if (ieee80211_is_reassoc_response(fc))
3808                         title = "RasRsp";
3809                 else if (ieee80211_is_probe_response(fc)) {
3810                         title = "PrbRsp";
3811                         print_dump = 1; /* dump frame contents */
3812                 } else if (ieee80211_is_beacon(fc)) {
3813                         title = "Beacon";
3814                         print_dump = 1; /* dump frame contents */
3815                 } else if (ieee80211_is_atim(fc))
3816                         title = "ATIM";
3817                 else if (ieee80211_is_auth(fc))
3818                         title = "Auth";
3819                 else if (ieee80211_is_deauth(fc))
3820                         title = "DeAuth";
3821                 else if (ieee80211_is_disassoc(fc))
3822                         title = "DisAssoc";
3823                 else
3824                         title = "Frame";
3825
3826                 rate_idx = iwl4965_hwrate_to_plcp_idx(rate_sym);
3827                 if (unlikely(rate_idx == -1))
3828                         bitrate = 0;
3829                 else
3830                         bitrate = iwl4965_rates[rate_idx].ieee / 2;
3831
3832                 /* print frame summary.
3833                  * MAC addresses show just the last byte (for brevity),
3834                  *    but you can hack it to show more, if you'd like to. */
3835                 if (dataframe)
3836                         IWL_DEBUG_RX("%s: mhd=0x%04x, dst=0x%02x, "
3837                                      "len=%u, rssi=%d, chnl=%d, rate=%u, \n",
3838                                      title, fc, header->addr1[5],
3839                                      length, rssi, channel, bitrate);
3840                 else {
3841                         /* src/dst addresses assume managed mode */
3842                         IWL_DEBUG_RX("%s: 0x%04x, dst=0x%02x, "
3843                                      "src=0x%02x, rssi=%u, tim=%lu usec, "
3844                                      "phy=0x%02x, chnl=%d\n",
3845                                      title, fc, header->addr1[5],
3846                                      header->addr3[5], rssi,
3847                                      tsf_low - priv->scan_start_tsf,
3848                                      phy_flags, channel);
3849                 }
3850         }
3851         if (print_dump)
3852                 iwl_print_hex_dump(IWL_DL_RX, data, length);
3853 }
3854 #else
3855 static inline void iwl4965_dbg_report_frame(struct iwl_priv *priv,
3856                                             struct iwl4965_rx_packet *pkt,
3857                                             struct ieee80211_hdr *header,
3858                                             int group100)
3859 {
3860 }
3861 #endif
3862
3863
3864 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
3865
3866 /* Called for REPLY_4965_RX (legacy ABG frames), or
3867  * REPLY_RX_MPDU_CMD (HT high-throughput N frames). */
3868 static void iwl4965_rx_reply_rx(struct iwl_priv *priv,
3869                                 struct iwl4965_rx_mem_buffer *rxb)
3870 {
3871         struct ieee80211_hdr *header;
3872         struct ieee80211_rx_status rx_status;
3873         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3874         /* Use phy data (Rx signal strength, etc.) contained within
3875          *   this rx packet for legacy frames,
3876          *   or phy data cached from REPLY_RX_PHY_CMD for HT frames. */
3877         int include_phy = (pkt->hdr.cmd == REPLY_4965_RX);
3878         struct iwl4965_rx_phy_res *rx_start = (include_phy) ?
3879                 (struct iwl4965_rx_phy_res *)&(pkt->u.raw[0]) :
3880                 (struct iwl4965_rx_phy_res *)&priv->last_phy_res[1];
3881         __le32 *rx_end;
3882         unsigned int len = 0;
3883         u16 fc;
3884         u8 network_packet;
3885
3886         rx_status.mactime = le64_to_cpu(rx_start->timestamp);
3887         rx_status.freq = ieee80211chan2mhz(le16_to_cpu(rx_start->channel));
3888         rx_status.band = (rx_start->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ?
3889                                 IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
3890         rx_status.rate_idx = iwl4965_hwrate_to_plcp_idx(
3891                                         le32_to_cpu(rx_start->rate_n_flags));
3892
3893         if (rx_status.band == IEEE80211_BAND_5GHZ)
3894                 rx_status.rate_idx -= IWL_FIRST_OFDM_RATE;
3895
3896         rx_status.antenna = 0;
3897         rx_status.flag = 0;
3898
3899         if ((unlikely(rx_start->cfg_phy_cnt > 20))) {
3900                 IWL_DEBUG_DROP
3901                         ("dsp size out of range [0,20]: "
3902                          "%d/n", rx_start->cfg_phy_cnt);
3903                 return;
3904         }
3905
3906         if (!include_phy) {
3907                 if (priv->last_phy_res[0])
3908                         rx_start = (struct iwl4965_rx_phy_res *)
3909                                 &priv->last_phy_res[1];
3910                 else
3911                         rx_start = NULL;
3912         }
3913
3914         if (!rx_start) {
3915                 IWL_ERROR("MPDU frame without a PHY data\n");
3916                 return;
3917         }
3918
3919         if (include_phy) {
3920                 header = (struct ieee80211_hdr *)((u8 *) & rx_start[1]
3921                                                   + rx_start->cfg_phy_cnt);
3922
3923                 len = le16_to_cpu(rx_start->byte_count);
3924                 rx_end = (__le32 *)(pkt->u.raw + rx_start->cfg_phy_cnt +
3925                                   sizeof(struct iwl4965_rx_phy_res) + len);
3926         } else {
3927                 struct iwl4965_rx_mpdu_res_start *amsdu =
3928                         (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw;
3929
3930                 header = (void *)(pkt->u.raw +
3931                         sizeof(struct iwl4965_rx_mpdu_res_start));
3932                 len = le16_to_cpu(amsdu->byte_count);
3933                 rx_end = (__le32 *) (pkt->u.raw +
3934                         sizeof(struct iwl4965_rx_mpdu_res_start) + len);
3935         }
3936
3937         if (!(*rx_end & RX_RES_STATUS_NO_CRC32_ERROR) ||
3938             !(*rx_end & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
3939                 IWL_DEBUG_RX("Bad CRC or FIFO: 0x%08X.\n",
3940                                 le32_to_cpu(*rx_end));
3941                 return;
3942         }
3943
3944         priv->ucode_beacon_time = le32_to_cpu(rx_start->beacon_time_stamp);
3945
3946         /* Find max signal strength (dBm) among 3 antenna/receiver chains */
3947         rx_status.ssi = iwl4965_calc_rssi(rx_start);
3948
3949         /* Meaningful noise values are available only from beacon statistics,
3950          *   which are gathered only when associated, and indicate noise
3951          *   only for the associated network channel ...
3952          * Ignore these noise values while scanning (other channels) */
3953         if (iwl4965_is_associated(priv) &&
3954             !test_bit(STATUS_SCANNING, &priv->status)) {
3955                 rx_status.noise = priv->last_rx_noise;
3956                 rx_status.signal = iwl4965_calc_sig_qual(rx_status.ssi,
3957                                                          rx_status.noise);
3958         } else {
3959                 rx_status.noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
3960                 rx_status.signal = iwl4965_calc_sig_qual(rx_status.ssi, 0);
3961         }
3962
3963         /* Reset beacon noise level if not associated. */
3964         if (!iwl4965_is_associated(priv))
3965                 priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
3966
3967         /* Set "1" to report good data frames in groups of 100 */
3968         /* FIXME: need to optimze the call: */
3969         iwl4965_dbg_report_frame(priv, pkt, header, 1);
3970
3971         IWL_DEBUG_STATS_LIMIT("Rssi %d, noise %d, qual %d, TSF %llu\n",
3972                               rx_status.ssi, rx_status.noise, rx_status.signal,
3973                               rx_status.mactime);
3974
3975         network_packet = iwl4965_is_network_packet(priv, header);
3976         if (network_packet) {
3977                 priv->last_rx_rssi = rx_status.ssi;
3978                 priv->last_beacon_time =  priv->ucode_beacon_time;
3979                 priv->last_tsf = le64_to_cpu(rx_start->timestamp);
3980         }
3981
3982         fc = le16_to_cpu(header->frame_control);
3983         switch (fc & IEEE80211_FCTL_FTYPE) {
3984         case IEEE80211_FTYPE_MGMT:
3985
3986                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
3987                         iwl4965_update_ps_mode(priv, fc  & IEEE80211_FCTL_PM,
3988                                                 header->addr2);
3989                 switch (fc & IEEE80211_FCTL_STYPE) {
3990                 case IEEE80211_STYPE_PROBE_RESP:
3991                 case IEEE80211_STYPE_BEACON:
3992                         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA &&
3993                              !compare_ether_addr(header->addr2, priv->bssid)) ||
3994                             (priv->iw_mode == IEEE80211_IF_TYPE_IBSS &&
3995                              !compare_ether_addr(header->addr3, priv->bssid))) {
3996                                 struct ieee80211_mgmt *mgmt =
3997                                         (struct ieee80211_mgmt *)header;
3998                                 u64 timestamp =
3999                                         le64_to_cpu(mgmt->u.beacon.timestamp);
4000
4001                                 priv->timestamp0 = timestamp & 0xFFFFFFFF;
4002                                 priv->timestamp1 =
4003                                         (timestamp >> 32) & 0xFFFFFFFF;
4004                                 priv->beacon_int = le16_to_cpu(
4005                                     mgmt->u.beacon.beacon_int);
4006                                 if (priv->call_post_assoc_from_beacon &&
4007                                     (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
4008                                         priv->call_post_assoc_from_beacon = 0;
4009                                         queue_work(priv->workqueue,
4010                                             &priv->post_associate.work);
4011                                 }
4012                         }
4013                         break;
4014
4015                 case IEEE80211_STYPE_ACTION:
4016                         break;
4017
4018                         /*
4019                          * TODO: Use the new callback function from
4020                          * mac80211 instead of sniffing these packets.
4021                          */
4022                 case IEEE80211_STYPE_ASSOC_RESP:
4023                 case IEEE80211_STYPE_REASSOC_RESP:
4024                         if (network_packet) {
4025 #ifdef CONFIG_IWL4965_HT
4026                                 u8 *pos = NULL;
4027                                 struct ieee802_11_elems elems;
4028 #endif                          /*CONFIG_IWL4965_HT */
4029                                 struct ieee80211_mgmt *mgnt =
4030                                         (struct ieee80211_mgmt *)header;
4031
4032                                 /* We have just associated, give some
4033                                  * time for the 4-way handshake if
4034                                  * any. Don't start scan too early. */
4035                                 priv->next_scan_jiffies = jiffies +
4036                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
4037
4038                                 priv->assoc_id = (~((1 << 15) | (1 << 14))
4039                                         & le16_to_cpu(mgnt->u.assoc_resp.aid));
4040                                 priv->assoc_capability =
4041                                         le16_to_cpu(
4042                                                 mgnt->u.assoc_resp.capab_info);
4043 #ifdef CONFIG_IWL4965_HT
4044                                 pos = mgnt->u.assoc_resp.variable;
4045                                 if (!parse_elems(pos,
4046                                                  len - (pos - (u8 *) mgnt),
4047                                                  &elems)) {
4048                                         if (elems.ht_extra_param &&
4049                                             elems.ht_cap_param)
4050                                                 break;
4051                                 }
4052 #endif                          /*CONFIG_IWL4965_HT */
4053                                 /* assoc_id is 0 no association */
4054                                 if (!priv->assoc_id)
4055                                         break;
4056                                 if (priv->beacon_int)
4057                                         queue_work(priv->workqueue,
4058                                             &priv->post_associate.work);
4059                                 else
4060                                         priv->call_post_assoc_from_beacon = 1;
4061                         }
4062
4063                         break;
4064
4065                 case IEEE80211_STYPE_PROBE_REQ:
4066                         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
4067                             !iwl4965_is_associated(priv)) {
4068                                 DECLARE_MAC_BUF(mac1);
4069                                 DECLARE_MAC_BUF(mac2);
4070                                 DECLARE_MAC_BUF(mac3);
4071
4072                                 IWL_DEBUG_DROP("Dropping (non network): "
4073                                                "%s, %s, %s\n",
4074                                                print_mac(mac1, header->addr1),
4075                                                print_mac(mac2, header->addr2),
4076                                                print_mac(mac3, header->addr3));
4077                                 return;
4078                         }
4079                 }
4080                 iwl4965_handle_data_packet(priv, 0, include_phy, rxb, &rx_status);
4081                 break;
4082
4083         case IEEE80211_FTYPE_CTL:
4084 #ifdef CONFIG_IWL4965_HT
4085                 switch (fc & IEEE80211_FCTL_STYPE) {
4086                 case IEEE80211_STYPE_BACK_REQ:
4087                         IWL_DEBUG_HT("IEEE80211_STYPE_BACK_REQ arrived\n");
4088                         iwl4965_handle_data_packet(priv, 0, include_phy,
4089                                                 rxb, &rx_status);
4090                         break;
4091                 default:
4092                         break;
4093                 }
4094 #endif
4095                 break;
4096
4097         case IEEE80211_FTYPE_DATA: {
4098                 DECLARE_MAC_BUF(mac1);
4099                 DECLARE_MAC_BUF(mac2);
4100                 DECLARE_MAC_BUF(mac3);
4101
4102                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
4103                         iwl4965_update_ps_mode(priv, fc  & IEEE80211_FCTL_PM,
4104                                                 header->addr2);
4105
4106                 if (unlikely(!network_packet))
4107                         IWL_DEBUG_DROP("Dropping (non network): "
4108                                        "%s, %s, %s\n",
4109                                        print_mac(mac1, header->addr1),
4110                                        print_mac(mac2, header->addr2),
4111                                        print_mac(mac3, header->addr3));
4112                 else if (unlikely(iwl4965_is_duplicate_packet(priv, header)))
4113                         IWL_DEBUG_DROP("Dropping (dup): %s, %s, %s\n",
4114                                        print_mac(mac1, header->addr1),
4115                                        print_mac(mac2, header->addr2),
4116                                        print_mac(mac3, header->addr3));
4117                 else
4118                         iwl4965_handle_data_packet(priv, 1, include_phy, rxb,
4119                                                    &rx_status);
4120                 break;
4121         }
4122         default:
4123                 break;
4124
4125         }
4126 }
4127
4128 /* Cache phy data (Rx signal strength, etc) for HT frame (REPLY_RX_PHY_CMD).
4129  * This will be used later in iwl4965_rx_reply_rx() for REPLY_RX_MPDU_CMD. */
4130 static void iwl4965_rx_reply_rx_phy(struct iwl_priv *priv,
4131                                     struct iwl4965_rx_mem_buffer *rxb)
4132 {
4133         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
4134         priv->last_phy_res[0] = 1;
4135         memcpy(&priv->last_phy_res[1], &(pkt->u.raw[0]),
4136                sizeof(struct iwl4965_rx_phy_res));
4137 }
4138
4139 static void iwl4965_rx_missed_beacon_notif(struct iwl_priv *priv,
4140                                            struct iwl4965_rx_mem_buffer *rxb)
4141
4142 {
4143 #ifdef CONFIG_IWL4965_SENSITIVITY
4144         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
4145         struct iwl4965_missed_beacon_notif *missed_beacon;
4146
4147         missed_beacon = &pkt->u.missed_beacon;
4148         if (le32_to_cpu(missed_beacon->consequtive_missed_beacons) > 5) {
4149                 IWL_DEBUG_CALIB("missed bcn cnsq %d totl %d rcd %d expctd %d\n",
4150                     le32_to_cpu(missed_beacon->consequtive_missed_beacons),
4151                     le32_to_cpu(missed_beacon->total_missed_becons),
4152                     le32_to_cpu(missed_beacon->num_recvd_beacons),
4153                     le32_to_cpu(missed_beacon->num_expected_beacons));
4154                 priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
4155                 if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)))
4156                         queue_work(priv->workqueue, &priv->sensitivity_work);
4157         }
4158 #endif /*CONFIG_IWL4965_SENSITIVITY*/
4159 }
4160
4161 #ifdef CONFIG_IWL4965_HT
4162
4163 /**
4164  * iwl4965_sta_modify_enable_tid_tx - Enable Tx for this TID in station table
4165  */
4166 static void iwl4965_sta_modify_enable_tid_tx(struct iwl_priv *priv,
4167                                          int sta_id, int tid)
4168 {
4169         unsigned long flags;
4170
4171         /* Remove "disable" flag, to enable Tx for this TID */
4172         spin_lock_irqsave(&priv->sta_lock, flags);
4173         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
4174         priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
4175         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
4176         spin_unlock_irqrestore(&priv->sta_lock, flags);
4177
4178         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
4179 }
4180
4181 /**
4182  * iwl4965_tx_status_reply_compressed_ba - Update tx status from block-ack
4183  *
4184  * Go through block-ack's bitmap of ACK'd frames, update driver's record of
4185  * ACK vs. not.  This gets sent to mac80211, then to rate scaling algo.
4186  */
4187 static int iwl4965_tx_status_reply_compressed_ba(struct iwl_priv *priv,
4188                                                  struct iwl4965_ht_agg *agg,
4189                                                  struct iwl4965_compressed_ba_resp*
4190                                                  ba_resp)
4191
4192 {
4193         int i, sh, ack;
4194         u16 seq_ctl = le16_to_cpu(ba_resp->seq_ctl);
4195         u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
4196         u64 bitmap;
4197         int successes = 0;
4198         struct ieee80211_tx_status *tx_status;
4199
4200         if (unlikely(!agg->wait_for_ba))  {
4201                 IWL_ERROR("Received BA when not expected\n");
4202                 return -EINVAL;
4203         }
4204
4205         /* Mark that the expected block-ack response arrived */
4206         agg->wait_for_ba = 0;
4207         IWL_DEBUG_TX_REPLY("BA %d %d\n", agg->start_idx, ba_resp->seq_ctl);
4208
4209         /* Calculate shift to align block-ack bits with our Tx window bits */
4210         sh = agg->start_idx - SEQ_TO_INDEX(seq_ctl>>4);
4211         if (sh < 0) /* tbw something is wrong with indices */
4212                 sh += 0x100;
4213
4214         /* don't use 64-bit values for now */
4215         bitmap = le64_to_cpu(ba_resp->bitmap) >> sh;
4216
4217         if (agg->frame_count > (64 - sh)) {
4218                 IWL_DEBUG_TX_REPLY("more frames than bitmap size");
4219                 return -1;
4220         }
4221
4222         /* check for success or failure according to the
4223          * transmitted bitmap and block-ack bitmap */
4224         bitmap &= agg->bitmap;
4225
4226         /* For each frame attempted in aggregation,
4227          * update driver's record of tx frame's status. */
4228         for (i = 0; i < agg->frame_count ; i++) {
4229                 ack = bitmap & (1 << i);
4230                 successes += !!ack;
4231                 IWL_DEBUG_TX_REPLY("%s ON i=%d idx=%d raw=%d\n",
4232                         ack? "ACK":"NACK", i, (agg->start_idx + i) & 0xff,
4233                         agg->start_idx + i);
4234         }
4235
4236         tx_status = &priv->txq[scd_flow].txb[agg->start_idx].status;
4237         tx_status->flags = IEEE80211_TX_STATUS_ACK;
4238         tx_status->flags |= IEEE80211_TX_STATUS_AMPDU;
4239         tx_status->ampdu_ack_map = successes;
4240         tx_status->ampdu_ack_len = agg->frame_count;
4241         iwl4965_hwrate_to_tx_control(priv, agg->rate_n_flags,
4242                                      &tx_status->control);
4243
4244         IWL_DEBUG_TX_REPLY("Bitmap %llx\n", (unsigned long long)bitmap);
4245
4246         return 0;
4247 }
4248
4249 /**
4250  * iwl4965_tx_queue_stop_scheduler - Stop queue, but keep configuration
4251  */
4252 static void iwl4965_tx_queue_stop_scheduler(struct iwl_priv *priv,
4253                                             u16 txq_id)
4254 {
4255         /* Simply stop the queue, but don't change any configuration;
4256          * the SCD_ACT_EN bit is the write-enable mask for the ACTIVE bit. */
4257         iwl4965_write_prph(priv,
4258                 KDR_SCD_QUEUE_STATUS_BITS(txq_id),
4259                 (0 << SCD_QUEUE_STTS_REG_POS_ACTIVE)|
4260                 (1 << SCD_QUEUE_STTS_REG_POS_SCD_ACT_EN));
4261 }
4262
4263 /**
4264  * txq_id must be greater than IWL_BACK_QUEUE_FIRST_ID
4265  * priv->lock must be held by the caller
4266  */
4267 static int iwl4965_tx_queue_agg_disable(struct iwl_priv *priv, u16 txq_id,
4268                                         u16 ssn_idx, u8 tx_fifo)
4269 {
4270         int ret = 0;
4271
4272         if (IWL_BACK_QUEUE_FIRST_ID > txq_id) {
4273                 IWL_WARNING("queue number too small: %d, must be > %d\n",
4274                                 txq_id, IWL_BACK_QUEUE_FIRST_ID);
4275                 return -EINVAL;
4276         }
4277
4278         ret = iwl4965_grab_nic_access(priv);
4279         if (ret)
4280                 return ret;
4281
4282         iwl4965_tx_queue_stop_scheduler(priv, txq_id);
4283
4284         iwl4965_clear_bits_prph(priv, KDR_SCD_QUEUECHAIN_SEL, (1 << txq_id));
4285
4286         priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
4287         priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
4288         /* supposes that ssn_idx is valid (!= 0xFFF) */
4289         iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
4290
4291         iwl4965_clear_bits_prph(priv, KDR_SCD_INTERRUPT_MASK, (1 << txq_id));
4292         iwl4965_txq_ctx_deactivate(priv, txq_id);
4293         iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 0);
4294
4295         iwl4965_release_nic_access(priv);
4296
4297         return 0;
4298 }
4299
4300 int iwl4965_check_empty_hw_queue(struct iwl_priv *priv, int sta_id,
4301                                          u8 tid, int txq_id)
4302 {
4303         struct iwl4965_queue *q = &priv->txq[txq_id].q;
4304         u8 *addr = priv->stations[sta_id].sta.sta.addr;
4305         struct iwl4965_tid_data *tid_data = &priv->stations[sta_id].tid[tid];
4306
4307         switch (priv->stations[sta_id].tid[tid].agg.state) {
4308         case IWL_EMPTYING_HW_QUEUE_DELBA:
4309                 /* We are reclaiming the last packet of the */
4310                 /* aggregated HW queue */
4311                 if (txq_id  == tid_data->agg.txq_id &&
4312                     q->read_ptr == q->write_ptr) {
4313                         u16 ssn = SEQ_TO_SN(tid_data->seq_number);
4314                         int tx_fifo = default_tid_to_tx_fifo[tid];
4315                         IWL_DEBUG_HT("HW queue empty: continue DELBA flow\n");
4316                         iwl4965_tx_queue_agg_disable(priv, txq_id,
4317                                                      ssn, tx_fifo);
4318                         tid_data->agg.state = IWL_AGG_OFF;
4319                         ieee80211_stop_tx_ba_cb_irqsafe(priv->hw, addr, tid);
4320                 }
4321                 break;
4322         case IWL_EMPTYING_HW_QUEUE_ADDBA:
4323                 /* We are reclaiming the last packet of the queue */
4324                 if (tid_data->tfds_in_queue == 0) {
4325                         IWL_DEBUG_HT("HW queue empty: continue ADDBA flow\n");
4326                         tid_data->agg.state = IWL_AGG_ON;
4327                         ieee80211_start_tx_ba_cb_irqsafe(priv->hw, addr, tid);
4328                 }
4329                 break;
4330         }
4331         return 0;
4332 }
4333
4334 /**
4335  * iwl4965_queue_dec_wrap - Decrement queue index, wrap back to end if needed
4336  * @index -- current index
4337  * @n_bd -- total number of entries in queue (s/b power of 2)
4338  */
4339 static inline int iwl4965_queue_dec_wrap(int index, int n_bd)
4340 {
4341         return (index == 0) ? n_bd - 1 : index - 1;
4342 }
4343
4344 /**
4345  * iwl4965_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
4346  *
4347  * Handles block-acknowledge notification from device, which reports success
4348  * of frames sent via aggregation.
4349  */
4350 static void iwl4965_rx_reply_compressed_ba(struct iwl_priv *priv,
4351                                            struct iwl4965_rx_mem_buffer *rxb)
4352 {
4353         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
4354         struct iwl4965_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba;
4355         int index;
4356         struct iwl4965_tx_queue *txq = NULL;
4357         struct iwl4965_ht_agg *agg;
4358         DECLARE_MAC_BUF(mac);
4359
4360         /* "flow" corresponds to Tx queue */
4361         u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
4362
4363         /* "ssn" is start of block-ack Tx window, corresponds to index
4364          * (in Tx queue's circular buffer) of first TFD/frame in window */
4365         u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
4366
4367         if (scd_flow >= ARRAY_SIZE(priv->txq)) {
4368                 IWL_ERROR("BUG_ON scd_flow is bigger than number of queues");
4369                 return;
4370         }
4371
4372         txq = &priv->txq[scd_flow];
4373         agg = &priv->stations[ba_resp->sta_id].tid[ba_resp->tid].agg;
4374
4375         /* Find index just before block-ack window */
4376         index = iwl4965_queue_dec_wrap(ba_resp_scd_ssn & 0xff, txq->q.n_bd);
4377
4378         /* TODO: Need to get this copy more safely - now good for debug */
4379
4380         IWL_DEBUG_TX_REPLY("REPLY_COMPRESSED_BA [%d]Received from %s, "
4381                            "sta_id = %d\n",
4382                            agg->wait_for_ba,
4383                            print_mac(mac, (u8*) &ba_resp->sta_addr_lo32),
4384                            ba_resp->sta_id);
4385         IWL_DEBUG_TX_REPLY("TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = "
4386                            "%d, scd_ssn = %d\n",
4387                            ba_resp->tid,
4388                            ba_resp->seq_ctl,
4389                            (unsigned long long)le64_to_cpu(ba_resp->bitmap),
4390                            ba_resp->scd_flow,
4391                            ba_resp->scd_ssn);
4392         IWL_DEBUG_TX_REPLY("DAT start_idx = %d, bitmap = 0x%llx \n",
4393                            agg->start_idx,
4394                            (unsigned long long)agg->bitmap);
4395
4396         /* Update driver's record of ACK vs. not for each frame in window */
4397         iwl4965_tx_status_reply_compressed_ba(priv, agg, ba_resp);
4398
4399         /* Release all TFDs before the SSN, i.e. all TFDs in front of
4400          * block-ack window (we assume that they've been successfully
4401          * transmitted ... if not, it's too late anyway). */
4402         if (txq->q.read_ptr != (ba_resp_scd_ssn & 0xff)) {
4403                 int freed = iwl4965_tx_queue_reclaim(priv, scd_flow, index);
4404                 priv->stations[ba_resp->sta_id].
4405                         tid[ba_resp->tid].tfds_in_queue -= freed;
4406                 if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
4407                         priv->mac80211_registered &&
4408                         agg->state != IWL_EMPTYING_HW_QUEUE_DELBA)
4409                         ieee80211_wake_queue(priv->hw, scd_flow);
4410                 iwl4965_check_empty_hw_queue(priv, ba_resp->sta_id,
4411                         ba_resp->tid, scd_flow);
4412         }
4413 }
4414
4415 /**
4416  * iwl4965_tx_queue_set_q2ratid - Map unique receiver/tid combination to a queue
4417  */
4418 static int iwl4965_tx_queue_set_q2ratid(struct iwl_priv *priv, u16 ra_tid,
4419                                         u16 txq_id)
4420 {
4421         u32 tbl_dw_addr;
4422         u32 tbl_dw;
4423         u16 scd_q2ratid;
4424
4425         scd_q2ratid = ra_tid & SCD_QUEUE_RA_TID_MAP_RATID_MSK;
4426
4427         tbl_dw_addr = priv->scd_base_addr +
4428                         SCD_TRANSLATE_TBL_OFFSET_QUEUE(txq_id);
4429
4430         tbl_dw = iwl4965_read_targ_mem(priv, tbl_dw_addr);
4431
4432         if (txq_id & 0x1)
4433                 tbl_dw = (scd_q2ratid << 16) | (tbl_dw & 0x0000FFFF);
4434         else
4435                 tbl_dw = scd_q2ratid | (tbl_dw & 0xFFFF0000);
4436
4437         iwl4965_write_targ_mem(priv, tbl_dw_addr, tbl_dw);
4438
4439         return 0;
4440 }
4441
4442
4443 /**
4444  * iwl4965_tx_queue_agg_enable - Set up & enable aggregation for selected queue
4445  *
4446  * NOTE:  txq_id must be greater than IWL_BACK_QUEUE_FIRST_ID,
4447  *        i.e. it must be one of the higher queues used for aggregation
4448  */
4449 static int iwl4965_tx_queue_agg_enable(struct iwl_priv *priv, int txq_id,
4450                                        int tx_fifo, int sta_id, int tid,
4451                                        u16 ssn_idx)
4452 {
4453         unsigned long flags;
4454         int rc;
4455         u16 ra_tid;
4456
4457         if (IWL_BACK_QUEUE_FIRST_ID > txq_id)
4458                 IWL_WARNING("queue number too small: %d, must be > %d\n",
4459                         txq_id, IWL_BACK_QUEUE_FIRST_ID);
4460
4461         ra_tid = BUILD_RAxTID(sta_id, tid);
4462
4463         /* Modify device's station table to Tx this TID */
4464         iwl4965_sta_modify_enable_tid_tx(priv, sta_id, tid);
4465
4466         spin_lock_irqsave(&priv->lock, flags);
4467         rc = iwl4965_grab_nic_access(priv);
4468         if (rc) {
4469                 spin_unlock_irqrestore(&priv->lock, flags);
4470                 return rc;
4471         }
4472
4473         /* Stop this Tx queue before configuring it */
4474         iwl4965_tx_queue_stop_scheduler(priv, txq_id);
4475
4476         /* Map receiver-address / traffic-ID to this queue */
4477         iwl4965_tx_queue_set_q2ratid(priv, ra_tid, txq_id);
4478
4479         /* Set this queue as a chain-building queue */
4480         iwl4965_set_bits_prph(priv, KDR_SCD_QUEUECHAIN_SEL, (1 << txq_id));
4481
4482         /* Place first TFD at index corresponding to start sequence number.
4483          * Assumes that ssn_idx is valid (!= 0xFFF) */
4484         priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
4485         priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
4486         iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
4487
4488         /* Set up Tx window size and frame limit for this queue */
4489         iwl4965_write_targ_mem(priv,
4490                         priv->scd_base_addr + SCD_CONTEXT_QUEUE_OFFSET(txq_id),
4491                         (SCD_WIN_SIZE << SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
4492                         SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
4493
4494         iwl4965_write_targ_mem(priv, priv->scd_base_addr +
4495                         SCD_CONTEXT_QUEUE_OFFSET(txq_id) + sizeof(u32),
4496                         (SCD_FRAME_LIMIT << SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS)
4497                         & SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
4498
4499         iwl4965_set_bits_prph(priv, KDR_SCD_INTERRUPT_MASK, (1 << txq_id));
4500
4501         /* Set up Status area in SRAM, map to Tx DMA/FIFO, activate the queue */
4502         iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 1);
4503
4504         iwl4965_release_nic_access(priv);
4505         spin_unlock_irqrestore(&priv->lock, flags);
4506
4507         return 0;
4508 }
4509
4510 #endif /* CONFIG_IWL4965_HT */
4511
4512 /**
4513  * iwl4965_add_station - Initialize a station's hardware rate table
4514  *
4515  * The uCode's station table contains a table of fallback rates
4516  * for automatic fallback during transmission.
4517  *
4518  * NOTE: This sets up a default set of values.  These will be replaced later
4519  *       if the driver's iwl-4965-rs rate scaling algorithm is used, instead of
4520  *       rc80211_simple.
4521  *
4522  * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
4523  *       calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
4524  *       which requires station table entry to exist).
4525  */
4526 void iwl4965_add_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
4527 {
4528         int i, r;
4529         struct iwl4965_link_quality_cmd link_cmd = {
4530                 .reserved1 = 0,
4531         };
4532         u16 rate_flags;
4533
4534         /* Set up the rate scaling to start at selected rate, fall back
4535          * all the way down to 1M in IEEE order, and then spin on 1M */
4536         if (is_ap)
4537                 r = IWL_RATE_54M_INDEX;
4538         else if (priv->band == IEEE80211_BAND_5GHZ)
4539                 r = IWL_RATE_6M_INDEX;
4540         else
4541                 r = IWL_RATE_1M_INDEX;
4542
4543         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
4544                 rate_flags = 0;
4545                 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
4546                         rate_flags |= RATE_MCS_CCK_MSK;
4547
4548                 /* Use Tx antenna B only */
4549                 rate_flags |= RATE_MCS_ANT_B_MSK;
4550                 rate_flags &= ~RATE_MCS_ANT_A_MSK;
4551
4552                 link_cmd.rs_table[i].rate_n_flags =
4553                         iwl4965_hw_set_rate_n_flags(iwl4965_rates[r].plcp, rate_flags);
4554                 r = iwl4965_get_prev_ieee_rate(r);
4555         }
4556
4557         link_cmd.general_params.single_stream_ant_msk = 2;
4558         link_cmd.general_params.dual_stream_ant_msk = 3;
4559         link_cmd.agg_params.agg_dis_start_th = 3;
4560         link_cmd.agg_params.agg_time_limit = cpu_to_le16(4000);
4561
4562         /* Update the rate scaling for control frame Tx to AP */
4563         link_cmd.sta_id = is_ap ? IWL_AP_ID : priv->hw_setting.bcast_sta_id;
4564
4565         iwl4965_send_cmd_pdu(priv, REPLY_TX_LINK_QUALITY_CMD, sizeof(link_cmd),
4566                          &link_cmd);
4567 }
4568
4569 #ifdef CONFIG_IWL4965_HT
4570
4571 static u8 iwl4965_is_channel_extension(struct iwl_priv *priv,
4572                                        enum ieee80211_band band,
4573                                        u16 channel, u8 extension_chan_offset)
4574 {
4575         const struct iwl_channel_info *ch_info;
4576
4577         ch_info = iwl_get_channel_info(priv, band, channel);
4578         if (!is_channel_valid(ch_info))
4579                 return 0;
4580
4581         if (extension_chan_offset == IWL_EXT_CHANNEL_OFFSET_NONE)
4582                 return 0;
4583
4584         if ((ch_info->fat_extension_channel == extension_chan_offset) ||
4585             (ch_info->fat_extension_channel == HT_IE_EXT_CHANNEL_MAX))
4586                 return 1;
4587
4588         return 0;
4589 }
4590
4591 static u8 iwl4965_is_fat_tx_allowed(struct iwl_priv *priv,
4592                                 struct ieee80211_ht_info *sta_ht_inf)
4593 {
4594         struct iwl_ht_info *iwl_ht_conf = &priv->current_ht_config;
4595
4596         if ((!iwl_ht_conf->is_ht) ||
4597            (iwl_ht_conf->supported_chan_width != IWL_CHANNEL_WIDTH_40MHZ) ||
4598            (iwl_ht_conf->extension_chan_offset == IWL_EXT_CHANNEL_OFFSET_NONE))
4599                 return 0;
4600
4601         if (sta_ht_inf) {
4602                 if ((!sta_ht_inf->ht_supported) ||
4603                    (!(sta_ht_inf->cap & IEEE80211_HT_CAP_SUP_WIDTH)))
4604                         return 0;
4605         }
4606
4607         return (iwl4965_is_channel_extension(priv, priv->band,
4608                                          iwl_ht_conf->control_channel,
4609                                          iwl_ht_conf->extension_chan_offset));
4610 }
4611
4612 void iwl4965_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_info *ht_info)
4613 {
4614         struct iwl4965_rxon_cmd *rxon = &priv->staging_rxon;
4615         u32 val;
4616
4617         if (!ht_info->is_ht)
4618                 return;
4619
4620         /* Set up channel bandwidth:  20 MHz only, or 20/40 mixed if fat ok */
4621         if (iwl4965_is_fat_tx_allowed(priv, NULL))
4622                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED_MSK;
4623         else
4624                 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
4625                                  RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
4626
4627         if (le16_to_cpu(rxon->channel) != ht_info->control_channel) {
4628                 IWL_DEBUG_ASSOC("control diff than current %d %d\n",
4629                                 le16_to_cpu(rxon->channel),
4630                                 ht_info->control_channel);
4631                 rxon->channel = cpu_to_le16(ht_info->control_channel);
4632                 return;
4633         }
4634
4635         /* Note: control channel is opposite of extension channel */
4636         switch (ht_info->extension_chan_offset) {
4637         case IWL_EXT_CHANNEL_OFFSET_ABOVE:
4638                 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
4639                 break;
4640         case IWL_EXT_CHANNEL_OFFSET_BELOW:
4641                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
4642                 break;
4643         case IWL_EXT_CHANNEL_OFFSET_NONE:
4644         default:
4645                 rxon->flags &= ~RXON_FLG_CHANNEL_MODE_MIXED_MSK;
4646                 break;
4647         }
4648
4649         val = ht_info->ht_protection;
4650
4651         rxon->flags |= cpu_to_le32(val << RXON_FLG_HT_OPERATING_MODE_POS);
4652
4653         iwl4965_set_rxon_chain(priv);
4654
4655         IWL_DEBUG_ASSOC("supported HT rate 0x%X %X "
4656                         "rxon flags 0x%X operation mode :0x%X "
4657                         "extension channel offset 0x%x "
4658                         "control chan %d\n",
4659                         ht_info->supp_mcs_set[0], ht_info->supp_mcs_set[1],
4660                         le32_to_cpu(rxon->flags), ht_info->ht_protection,
4661                         ht_info->extension_chan_offset,
4662                         ht_info->control_channel);
4663         return;
4664 }
4665
4666 void iwl4965_set_ht_add_station(struct iwl_priv *priv, u8 index,
4667                                 struct ieee80211_ht_info *sta_ht_inf)
4668 {
4669         __le32 sta_flags;
4670         u8 mimo_ps_mode;
4671
4672         if (!sta_ht_inf || !sta_ht_inf->ht_supported)
4673                 goto done;
4674
4675         mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2;
4676
4677         sta_flags = priv->stations[index].sta.station_flags;
4678
4679         sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
4680
4681         switch (mimo_ps_mode) {
4682         case WLAN_HT_CAP_MIMO_PS_STATIC:
4683                 sta_flags |= STA_FLG_MIMO_DIS_MSK;
4684                 break;
4685         case WLAN_HT_CAP_MIMO_PS_DYNAMIC:
4686                 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
4687                 break;
4688         case WLAN_HT_CAP_MIMO_PS_DISABLED:
4689                 break;
4690         default:
4691                 IWL_WARNING("Invalid MIMO PS mode %d", mimo_ps_mode);
4692                 break;
4693         }
4694
4695         sta_flags |= cpu_to_le32(
4696               (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
4697
4698         sta_flags |= cpu_to_le32(
4699               (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
4700
4701         if (iwl4965_is_fat_tx_allowed(priv, sta_ht_inf))
4702                 sta_flags |= STA_FLG_FAT_EN_MSK;
4703         else
4704                 sta_flags &= ~STA_FLG_FAT_EN_MSK;
4705
4706         priv->stations[index].sta.station_flags = sta_flags;
4707  done:
4708         return;
4709 }
4710
4711 static void iwl4965_sta_modify_add_ba_tid(struct iwl_priv *priv,
4712                                           int sta_id, int tid, u16 ssn)
4713 {
4714         unsigned long flags;
4715
4716         spin_lock_irqsave(&priv->sta_lock, flags);
4717         priv->stations[sta_id].sta.station_flags_msk = 0;
4718         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
4719         priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
4720         priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
4721         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
4722         spin_unlock_irqrestore(&priv->sta_lock, flags);
4723
4724         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
4725 }
4726
4727 static void iwl4965_sta_modify_del_ba_tid(struct iwl_priv *priv,
4728                                           int sta_id, int tid)
4729 {
4730         unsigned long flags;
4731
4732         spin_lock_irqsave(&priv->sta_lock, flags);
4733         priv->stations[sta_id].sta.station_flags_msk = 0;
4734         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
4735         priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
4736         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
4737         spin_unlock_irqrestore(&priv->sta_lock, flags);
4738
4739         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
4740 }
4741
4742 /*
4743  * Find first available (lowest unused) Tx Queue, mark it "active".
4744  * Called only when finding queue for aggregation.
4745  * Should never return anything < 7, because they should already
4746  * be in use as EDCA AC (0-3), Command (4), HCCA (5, 6).
4747  */
4748 static int iwl4965_txq_ctx_activate_free(struct iwl_priv *priv)
4749 {
4750         int txq_id;
4751
4752         for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++)
4753                 if (!test_and_set_bit(txq_id, &priv->txq_ctx_active_msk))
4754                         return txq_id;
4755         return -1;
4756 }
4757
4758 static int iwl4965_mac_ht_tx_agg_start(struct ieee80211_hw *hw, const u8 *da,
4759                                        u16 tid, u16 *start_seq_num)
4760 {
4761         struct iwl_priv *priv = hw->priv;
4762         int sta_id;
4763         int tx_fifo;
4764         int txq_id;
4765         int ssn = -1;
4766         int ret = 0;
4767         unsigned long flags;
4768         struct iwl4965_tid_data *tid_data;
4769         DECLARE_MAC_BUF(mac);
4770
4771         if (likely(tid < ARRAY_SIZE(default_tid_to_tx_fifo)))
4772                 tx_fifo = default_tid_to_tx_fifo[tid];
4773         else
4774                 return -EINVAL;
4775
4776         IWL_WARNING("%s on da = %s tid = %d\n",
4777                         __func__, print_mac(mac, da), tid);
4778
4779         sta_id = iwl4965_hw_find_station(priv, da);
4780         if (sta_id == IWL_INVALID_STATION)
4781                 return -ENXIO;
4782
4783         if (priv->stations[sta_id].tid[tid].agg.state != IWL_AGG_OFF) {
4784                 IWL_ERROR("Start AGG when state is not IWL_AGG_OFF !\n");
4785                 return -ENXIO;
4786         }
4787
4788         txq_id = iwl4965_txq_ctx_activate_free(priv);
4789         if (txq_id == -1)
4790                 return -ENXIO;
4791
4792         spin_lock_irqsave(&priv->sta_lock, flags);
4793         tid_data = &priv->stations[sta_id].tid[tid];
4794         ssn = SEQ_TO_SN(tid_data->seq_number);
4795         tid_data->agg.txq_id = txq_id;
4796         spin_unlock_irqrestore(&priv->sta_lock, flags);
4797
4798         *start_seq_num = ssn;
4799         ret = iwl4965_tx_queue_agg_enable(priv, txq_id, tx_fifo,
4800                                           sta_id, tid, ssn);
4801         if (ret)
4802                 return ret;
4803
4804         ret = 0;
4805         if (tid_data->tfds_in_queue == 0) {
4806                 printk(KERN_ERR "HW queue is empty\n");
4807                 tid_data->agg.state = IWL_AGG_ON;
4808                 ieee80211_start_tx_ba_cb_irqsafe(hw, da, tid);
4809         } else {
4810                 IWL_DEBUG_HT("HW queue is NOT empty: %d packets in HW queue\n",
4811                                 tid_data->tfds_in_queue);
4812                 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA;
4813         }
4814         return ret;
4815 }
4816
4817 static int iwl4965_mac_ht_tx_agg_stop(struct ieee80211_hw *hw, const u8 *da,
4818                                       u16 tid)
4819 {
4820
4821         struct iwl_priv *priv = hw->priv;
4822         int tx_fifo_id, txq_id, sta_id, ssn = -1;
4823         struct iwl4965_tid_data *tid_data;
4824         int ret, write_ptr, read_ptr;
4825         unsigned long flags;
4826         DECLARE_MAC_BUF(mac);
4827
4828         if (!da) {
4829                 IWL_ERROR("da = NULL\n");
4830                 return -EINVAL;
4831         }
4832
4833         if (likely(tid < ARRAY_SIZE(default_tid_to_tx_fifo)))
4834                 tx_fifo_id = default_tid_to_tx_fifo[tid];
4835         else
4836                 return -EINVAL;
4837
4838         sta_id = iwl4965_hw_find_station(priv, da);
4839
4840         if (sta_id == IWL_INVALID_STATION)
4841                 return -ENXIO;
4842
4843         if (priv->stations[sta_id].tid[tid].agg.state != IWL_AGG_ON)
4844                 IWL_WARNING("Stopping AGG while state not IWL_AGG_ON\n");
4845
4846         tid_data = &priv->stations[sta_id].tid[tid];
4847         ssn = (tid_data->seq_number & IEEE80211_SCTL_SEQ) >> 4;
4848         txq_id = tid_data->agg.txq_id;
4849         write_ptr = priv->txq[txq_id].q.write_ptr;
4850         read_ptr = priv->txq[txq_id].q.read_ptr;
4851
4852         /* The queue is not empty */
4853         if (write_ptr != read_ptr) {
4854                 IWL_DEBUG_HT("Stopping a non empty AGG HW QUEUE\n");
4855                 priv->stations[sta_id].tid[tid].agg.state =
4856                                 IWL_EMPTYING_HW_QUEUE_DELBA;
4857                 return 0;
4858         }
4859
4860         IWL_DEBUG_HT("HW queue empty\n");;
4861         priv->stations[sta_id].tid[tid].agg.state = IWL_AGG_OFF;
4862
4863         spin_lock_irqsave(&priv->lock, flags);
4864         ret = iwl4965_tx_queue_agg_disable(priv, txq_id, ssn, tx_fifo_id);
4865         spin_unlock_irqrestore(&priv->lock, flags);
4866
4867         if (ret)
4868                 return ret;
4869
4870         ieee80211_stop_tx_ba_cb_irqsafe(priv->hw, da, tid);
4871
4872         IWL_DEBUG_INFO("iwl4965_mac_ht_tx_agg_stop on da=%s tid=%d\n",
4873                         print_mac(mac, da), tid);
4874
4875         return 0;
4876 }
4877
4878 int iwl4965_mac_ampdu_action(struct ieee80211_hw *hw,
4879                              enum ieee80211_ampdu_mlme_action action,
4880                              const u8 *addr, u16 tid, u16 *ssn)
4881 {
4882         struct iwl_priv *priv = hw->priv;
4883         int sta_id;
4884         DECLARE_MAC_BUF(mac);
4885
4886         IWL_DEBUG_HT("A-MPDU action on da=%s tid=%d ",
4887                         print_mac(mac, addr), tid);
4888         sta_id = iwl4965_hw_find_station(priv, addr);
4889         switch (action) {
4890         case IEEE80211_AMPDU_RX_START:
4891                 IWL_DEBUG_HT("start Rx\n");
4892                 iwl4965_sta_modify_add_ba_tid(priv, sta_id, tid, *ssn);
4893                 break;
4894         case IEEE80211_AMPDU_RX_STOP:
4895                 IWL_DEBUG_HT("stop Rx\n");
4896                 iwl4965_sta_modify_del_ba_tid(priv, sta_id, tid);
4897                 break;
4898         case IEEE80211_AMPDU_TX_START:
4899                 IWL_DEBUG_HT("start Tx\n");
4900                 return iwl4965_mac_ht_tx_agg_start(hw, addr, tid, ssn);
4901         case IEEE80211_AMPDU_TX_STOP:
4902                 IWL_DEBUG_HT("stop Tx\n");
4903                 return iwl4965_mac_ht_tx_agg_stop(hw, addr, tid);
4904         default:
4905                 IWL_DEBUG_HT("unknown\n");
4906                 return -EINVAL;
4907                 break;
4908         }
4909         return 0;
4910 }
4911
4912 #endif /* CONFIG_IWL4965_HT */
4913
4914 /* Set up 4965-specific Rx frame reply handlers */
4915 void iwl4965_hw_rx_handler_setup(struct iwl_priv *priv)
4916 {
4917         /* Legacy Rx frames */
4918         priv->rx_handlers[REPLY_4965_RX] = iwl4965_rx_reply_rx;
4919
4920         /* High-throughput (HT) Rx frames */
4921         priv->rx_handlers[REPLY_RX_PHY_CMD] = iwl4965_rx_reply_rx_phy;
4922         priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwl4965_rx_reply_rx;
4923
4924         priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] =
4925             iwl4965_rx_missed_beacon_notif;
4926
4927 #ifdef CONFIG_IWL4965_HT
4928         priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl4965_rx_reply_compressed_ba;
4929 #endif /* CONFIG_IWL4965_HT */
4930 }
4931
4932 void iwl4965_hw_setup_deferred_work(struct iwl_priv *priv)
4933 {
4934         INIT_WORK(&priv->txpower_work, iwl4965_bg_txpower_work);
4935         INIT_WORK(&priv->statistics_work, iwl4965_bg_statistics_work);
4936 #ifdef CONFIG_IWL4965_SENSITIVITY
4937         INIT_WORK(&priv->sensitivity_work, iwl4965_bg_sensitivity_work);
4938 #endif
4939         init_timer(&priv->statistics_periodic);
4940         priv->statistics_periodic.data = (unsigned long)priv;
4941         priv->statistics_periodic.function = iwl4965_bg_statistics_periodic;
4942 }
4943
4944 void iwl4965_hw_cancel_deferred_work(struct iwl_priv *priv)
4945 {
4946         del_timer_sync(&priv->statistics_periodic);
4947
4948         cancel_delayed_work(&priv->init_alive_start);
4949 }
4950
4951 static struct iwl_lib_ops iwl4965_lib = {
4952         .init_drv = iwl4965_init_drv,
4953         .eeprom_ops = {
4954                 .verify_signature  = iwlcore_eeprom_verify_signature,
4955                 .acquire_semaphore = iwlcore_eeprom_acquire_semaphore,
4956                 .release_semaphore = iwlcore_eeprom_release_semaphore,
4957         },
4958 };
4959
4960 static struct iwl_ops iwl4965_ops = {
4961         .lib = &iwl4965_lib,
4962 };
4963
4964 static struct iwl_cfg iwl4965_agn_cfg = {
4965         .name = "4965AGN",
4966         .fw_name = "iwlwifi-4965" IWL4965_UCODE_API ".ucode",
4967         .sku = IWL_SKU_A|IWL_SKU_G|IWL_SKU_N,
4968         .ops = &iwl4965_ops,
4969 };
4970
4971 struct pci_device_id iwl4965_hw_card_ids[] = {
4972         {IWL_PCI_DEVICE(0x4229, PCI_ANY_ID, iwl4965_agn_cfg)},
4973         {IWL_PCI_DEVICE(0x4230, PCI_ANY_ID, iwl4965_agn_cfg)},
4974         {0}
4975 };
4976
4977 MODULE_DEVICE_TABLE(pci, iwl4965_hw_card_ids);