SAFE public projects git trees. - safe/jmp/linux-2.6/blob - 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-4965.h"
  43 #include "iwl-core.h"
  44 #include "iwl-io.h"
  45 #include "iwl-helpers.h"
  46
  47 /* module parameters */
  48 static struct iwl_mod_params iwl4965_mod_params = {
  49         .num_of_queues = IWL4965_MAX_NUM_QUEUES,
  50         .enable_qos = 1,
  51         .amsdu_size_8K = 1,
  52         /* the rest are 0 by default */
  53 };
  54
  55 static void iwl4965_hw_card_show_info(struct iwl_priv *priv);
  56
  57 #define IWL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np)    \
  58         [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP,      \
  59                                     IWL_RATE_SISO_##s##M_PLCP, \
  60                                     IWL_RATE_MIMO_##s##M_PLCP, \
  61                                     IWL_RATE_##r##M_IEEE,      \
  62                                     IWL_RATE_##ip##M_INDEX,    \
  63                                     IWL_RATE_##in##M_INDEX,    \
  64                                     IWL_RATE_##rp##M_INDEX,    \
  65                                     IWL_RATE_##rn##M_INDEX,    \
  66                                     IWL_RATE_##pp##M_INDEX,    \
  67                                     IWL_RATE_##np##M_INDEX }
  68
  69 /*
  70  * Parameter order:
  71  *   rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate
  72  *
  73  * If there isn't a valid next or previous rate then INV is used which
  74  * maps to IWL_RATE_INVALID
  75  *
  76  */
  77 const struct iwl4965_rate_info iwl4965_rates[IWL_RATE_COUNT] = {
  78         IWL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2),    /*  1mbps */
  79         IWL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5),          /*  2mbps */
  80         IWL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11),        /*5.5mbps */
  81         IWL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18),      /* 11mbps */
  82         IWL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11),        /*  6mbps */
  83         IWL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11),       /*  9mbps */
  84         IWL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18),   /* 12mbps */
  85         IWL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24),   /* 18mbps */
  86         IWL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36),   /* 24mbps */
  87         IWL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48),   /* 36mbps */
  88         IWL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54),   /* 48mbps */
  89         IWL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */
  90         IWL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */
  91 };
  92
  93 #ifdef CONFIG_IWL4965_HT
  94
  95 static const u16 default_tid_to_tx_fifo[] = {
  96         IWL_TX_FIFO_AC1,
  97         IWL_TX_FIFO_AC0,
  98         IWL_TX_FIFO_AC0,
  99         IWL_TX_FIFO_AC1,
 100         IWL_TX_FIFO_AC2,
 101         IWL_TX_FIFO_AC2,
 102         IWL_TX_FIFO_AC3,
 103         IWL_TX_FIFO_AC3,
 104         IWL_TX_FIFO_NONE,
 105         IWL_TX_FIFO_NONE,
 106         IWL_TX_FIFO_NONE,
 107         IWL_TX_FIFO_NONE,
 108         IWL_TX_FIFO_NONE,
 109         IWL_TX_FIFO_NONE,
 110         IWL_TX_FIFO_NONE,
 111         IWL_TX_FIFO_NONE,
 112         IWL_TX_FIFO_AC3
 113 };
 114
 115 #endif  /*CONFIG_IWL4965_HT */
 116
 117 /* check contents of special bootstrap uCode SRAM */
 118 static int iwl4965_verify_bsm(struct iwl_priv *priv)
 119 {
 120         __le32 *image = priv->ucode_boot.v_addr;
 121         u32 len = priv->ucode_boot.len;
 122         u32 reg;
 123         u32 val;
 124
 125         IWL_DEBUG_INFO("Begin verify bsm\n");
 126
 127         /* verify BSM SRAM contents */
 128         val = iwl_read_prph(priv, BSM_WR_DWCOUNT_REG);
 129         for (reg = BSM_SRAM_LOWER_BOUND;
 130              reg < BSM_SRAM_LOWER_BOUND + len;
 131              reg += sizeof(u32), image++) {
 132                 val = iwl_read_prph(priv, reg);
 133                 if (val != le32_to_cpu(*image)) {
 134                         IWL_ERROR("BSM uCode verification failed at "
 135                                   "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
 136                                   BSM_SRAM_LOWER_BOUND,
 137                                   reg - BSM_SRAM_LOWER_BOUND, len,
 138                                   val, le32_to_cpu(*image));
 139                         return -EIO;
 140                 }
 141         }
 142
 143         IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");
 144
 145         return 0;
 146 }
 147
 148 /**
 149  * iwl4965_load_bsm - Load bootstrap instructions
 150  *
 151  * BSM operation:
 152  *
 153  * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
 154  * in special SRAM that does not power down during RFKILL.  When powering back
 155  * up after power-saving sleeps (or during initial uCode load), the BSM loads
 156  * the bootstrap program into the on-board processor, and starts it.
 157  *
 158  * The bootstrap program loads (via DMA) instructions and data for a new
 159  * program from host DRAM locations indicated by the host driver in the
 160  * BSM_DRAM_* registers.  Once the new program is loaded, it starts
 161  * automatically.
 162  *
 163  * When initializing the NIC, the host driver points the BSM to the
 164  * "initialize" uCode image.  This uCode sets up some internal data, then
 165  * notifies host via "initialize alive" that it is complete.
 166  *
 167  * The host then replaces the BSM_DRAM_* pointer values to point to the
 168  * normal runtime uCode instructions and a backup uCode data cache buffer
 169  * (filled initially with starting data values for the on-board processor),
 170  * then triggers the "initialize" uCode to load and launch the runtime uCode,
 171  * which begins normal operation.
 172  *
 173  * When doing a power-save shutdown, runtime uCode saves data SRAM into
 174  * the backup data cache in DRAM before SRAM is powered down.
 175  *
 176  * When powering back up, the BSM loads the bootstrap program.  This reloads
 177  * the runtime uCode instructions and the backup data cache into SRAM,
 178  * and re-launches the runtime uCode from where it left off.
 179  */
 180 static int iwl4965_load_bsm(struct iwl_priv *priv)
 181 {
 182         __le32 *image = priv->ucode_boot.v_addr;
 183         u32 len = priv->ucode_boot.len;
 184         dma_addr_t pinst;
 185         dma_addr_t pdata;
 186         u32 inst_len;
 187         u32 data_len;
 188         int i;
 189         u32 done;
 190         u32 reg_offset;
 191         int ret;
 192
 193         IWL_DEBUG_INFO("Begin load bsm\n");
 194
 195         /* make sure bootstrap program is no larger than BSM's SRAM size */
 196         if (len > IWL_MAX_BSM_SIZE)
 197                 return -EINVAL;
 198
 199         /* Tell bootstrap uCode where to find the "Initialize" uCode
 200          *   in host DRAM ... host DRAM physical address bits 35:4 for 4965.
 201          * NOTE:  iwl4965_initialize_alive_start() will replace these values,
 202          *        after the "initialize" uCode has run, to point to
 203          *        runtime/protocol instructions and backup data cache. */
 204         pinst = priv->ucode_init.p_addr >> 4;
 205         pdata = priv->ucode_init_data.p_addr >> 4;
 206         inst_len = priv->ucode_init.len;
 207         data_len = priv->ucode_init_data.len;
 208
 209         ret = iwl_grab_nic_access(priv);
 210         if (ret)
 211                 return ret;
 212
 213         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
 214         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
 215         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
 216         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
 217
 218         /* Fill BSM memory with bootstrap instructions */
 219         for (reg_offset = BSM_SRAM_LOWER_BOUND;
 220              reg_offset < BSM_SRAM_LOWER_BOUND + len;
 221              reg_offset += sizeof(u32), image++)
 222                 _iwl_write_prph(priv, reg_offset, le32_to_cpu(*image));
 223
 224         ret = iwl4965_verify_bsm(priv);
 225         if (ret) {
 226                 iwl_release_nic_access(priv);
 227                 return ret;
 228         }
 229
 230         /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
 231         iwl_write_prph(priv, BSM_WR_MEM_SRC_REG, 0x0);
 232         iwl_write_prph(priv, BSM_WR_MEM_DST_REG, RTC_INST_LOWER_BOUND);
 233         iwl_write_prph(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
 234
 235         /* Load bootstrap code into instruction SRAM now,
 236          *   to prepare to load "initialize" uCode */
 237         iwl_write_prph(priv, BSM_WR_CTRL_REG, BSM_WR_CTRL_REG_BIT_START);
 238
 239         /* Wait for load of bootstrap uCode to finish */
 240         for (i = 0; i < 100; i++) {
 241                 done = iwl_read_prph(priv, BSM_WR_CTRL_REG);
 242                 if (!(done & BSM_WR_CTRL_REG_BIT_START))
 243                         break;
 244                 udelay(10);
 245         }
 246         if (i < 100)
 247                 IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
 248         else {
 249                 IWL_ERROR("BSM write did not complete!\n");
 250                 return -EIO;
 251         }
 252
 253         /* Enable future boot loads whenever power management unit triggers it
 254          *   (e.g. when powering back up after power-save shutdown) */
 255         iwl_write_prph(priv, BSM_WR_CTRL_REG, BSM_WR_CTRL_REG_BIT_START_EN);
 256
 257         iwl_release_nic_access(priv);
 258
 259         return 0;
 260 }
 261
 262 static int iwl4965_init_drv(struct iwl_priv *priv)
 263 {
 264         int ret;
 265         int i;
 266
 267         priv->antenna = (enum iwl4965_antenna)priv->cfg->mod_params->antenna;
 268         priv->retry_rate = 1;
 269         priv->ibss_beacon = NULL;
 270
 271         spin_lock_init(&priv->lock);
 272         spin_lock_init(&priv->power_data.lock);
 273         spin_lock_init(&priv->sta_lock);
 274         spin_lock_init(&priv->hcmd_lock);
 275         spin_lock_init(&priv->lq_mngr.lock);
 276
 277         priv->shared_virt = pci_alloc_consistent(priv->pci_dev,
 278                                         sizeof(struct iwl4965_shared),
 279                                         &priv->shared_phys);
 280
 281         if (!priv->shared_virt) {
 282                 ret = -ENOMEM;
 283                 goto err;
 284         }
 285
 286         memset(priv->shared_virt, 0, sizeof(struct iwl4965_shared));
 287
 288
 289         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++)
 290                 INIT_LIST_HEAD(&priv->ibss_mac_hash[i]);
 291
 292         INIT_LIST_HEAD(&priv->free_frames);
 293
 294         mutex_init(&priv->mutex);
 295
 296         /* Clear the driver's (not device's) station table */
 297         iwlcore_clear_stations_table(priv);
 298
 299         priv->data_retry_limit = -1;
 300         priv->ieee_channels = NULL;
 301         priv->ieee_rates = NULL;
 302         priv->band = IEEE80211_BAND_2GHZ;
 303
 304         priv->iw_mode = IEEE80211_IF_TYPE_STA;
 305
 306         priv->use_ant_b_for_management_frame = 1; /* start with ant B */
 307         priv->valid_antenna = 0x7;      /* assume all 3 connected */
 308         priv->ps_mode = IWL_MIMO_PS_NONE;
 309
 310         /* Choose which receivers/antennas to use */
 311         iwl4965_set_rxon_chain(priv);
 312
 313         iwlcore_reset_qos(priv);
 314
 315         priv->qos_data.qos_active = 0;
 316         priv->qos_data.qos_cap.val = 0;
 317
 318         iwlcore_set_rxon_channel(priv, IEEE80211_BAND_2GHZ, 6);
 319
 320         priv->rates_mask = IWL_RATES_MASK;
 321         /* If power management is turned on, default to AC mode */
 322         priv->power_mode = IWL_POWER_AC;
 323         priv->user_txpower_limit = IWL_DEFAULT_TX_POWER;
 324
 325         ret = iwl_init_channel_map(priv);
 326         if (ret) {
 327                 IWL_ERROR("initializing regulatory failed: %d\n", ret);
 328                 goto err;
 329         }
 330
 331         ret = iwl4965_init_geos(priv);
 332         if (ret) {
 333                 IWL_ERROR("initializing geos failed: %d\n", ret);
 334                 goto err_free_channel_map;
 335         }
 336
 337         ret = ieee80211_register_hw(priv->hw);
 338         if (ret) {
 339                 IWL_ERROR("Failed to register network device (error %d)\n",
 340                                 ret);
 341                 goto err_free_geos;
 342         }
 343
 344         priv->hw->conf.beacon_int = 100;
 345         priv->mac80211_registered = 1;
 346
 347         return 0;
 348
 349 err_free_geos:
 350         iwl4965_free_geos(priv);
 351 err_free_channel_map:
 352         iwl_free_channel_map(priv);
 353 err:
 354         return ret;
 355 }
 356
 357 static int is_fat_channel(__le32 rxon_flags)
 358 {
 359         return (rxon_flags & RXON_FLG_CHANNEL_MODE_PURE_40_MSK) ||
 360                 (rxon_flags & RXON_FLG_CHANNEL_MODE_MIXED_MSK);
 361 }
 362
 363 static u8 is_single_stream(struct iwl_priv *priv)
 364 {
 365 #ifdef CONFIG_IWL4965_HT
 366         if (!priv->current_ht_config.is_ht ||
 367             (priv->current_ht_config.supp_mcs_set[1] == 0) ||
 368             (priv->ps_mode == IWL_MIMO_PS_STATIC))
 369                 return 1;
 370 #else
 371         return 1;
 372 #endif  /*CONFIG_IWL4965_HT */
 373         return 0;
 374 }
 375
 376 int iwl4965_hwrate_to_plcp_idx(u32 rate_n_flags)
 377 {
 378         int idx = 0;
 379
 380         /* 4965 HT rate format */
 381         if (rate_n_flags & RATE_MCS_HT_MSK) {
 382                 idx = (rate_n_flags & 0xff);
 383
 384                 if (idx >= IWL_RATE_MIMO_6M_PLCP)
 385                         idx = idx - IWL_RATE_MIMO_6M_PLCP;
 386
 387                 idx += IWL_FIRST_OFDM_RATE;
 388                 /* skip 9M not supported in ht*/
 389                 if (idx >= IWL_RATE_9M_INDEX)
 390                         idx += 1;
 391                 if ((idx >= IWL_FIRST_OFDM_RATE) && (idx <= IWL_LAST_OFDM_RATE))
 392                         return idx;
 393
 394         /* 4965 legacy rate format, search for match in table */
 395         } else {
 396                 for (idx = 0; idx < ARRAY_SIZE(iwl4965_rates); idx++)
 397                         if (iwl4965_rates[idx].plcp == (rate_n_flags & 0xFF))
 398                                 return idx;
 399         }
 400
 401         return -1;
 402 }
 403
 404 /**
 405  * translate ucode response to mac80211 tx status control values
 406  */
 407 void iwl4965_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
 408                                   struct ieee80211_tx_control *control)
 409 {
 410         int rate_index;
 411
 412         control->antenna_sel_tx =
 413                 ((rate_n_flags & RATE_MCS_ANT_AB_MSK) >> RATE_MCS_ANT_POS);
 414         if (rate_n_flags & RATE_MCS_HT_MSK)
 415                 control->flags |= IEEE80211_TXCTL_OFDM_HT;
 416         if (rate_n_flags & RATE_MCS_GF_MSK)
 417                 control->flags |= IEEE80211_TXCTL_GREEN_FIELD;
 418         if (rate_n_flags & RATE_MCS_FAT_MSK)
 419                 control->flags |= IEEE80211_TXCTL_40_MHZ_WIDTH;
 420         if (rate_n_flags & RATE_MCS_DUP_MSK)
 421                 control->flags |= IEEE80211_TXCTL_DUP_DATA;
 422         if (rate_n_flags & RATE_MCS_SGI_MSK)
 423                 control->flags |= IEEE80211_TXCTL_SHORT_GI;
 424         /* since iwl4965_hwrate_to_plcp_idx is band indifferent, we always use
 425          * IEEE80211_BAND_2GHZ band as it contains all the rates */
 426         rate_index = iwl4965_hwrate_to_plcp_idx(rate_n_flags);
 427         if (rate_index == -1)
 428                 control->tx_rate = NULL;
 429         else
 430                 control->tx_rate =
 431                         &priv->bands[IEEE80211_BAND_2GHZ].bitrates[rate_index];
 432 }
 433
 434 /*
 435  * Determine how many receiver/antenna chains to use.
 436  * More provides better reception via diversity.  Fewer saves power.
 437  * MIMO (dual stream) requires at least 2, but works better with 3.
 438  * This does not determine *which* chains to use, just how many.
 439  */
 440 static int iwl4965_get_rx_chain_counter(struct iwl_priv *priv,
 441                                         u8 *idle_state, u8 *rx_state)
 442 {
 443         u8 is_single = is_single_stream(priv);
 444         u8 is_cam = test_bit(STATUS_POWER_PMI, &priv->status) ? 0 : 1;
 445
 446         /* # of Rx chains to use when expecting MIMO. */
 447         if (is_single || (!is_cam && (priv->ps_mode == IWL_MIMO_PS_STATIC)))
 448                 *rx_state = 2;
 449         else
 450                 *rx_state = 3;
 451
 452         /* # Rx chains when idling and maybe trying to save power */
 453         switch (priv->ps_mode) {
 454         case IWL_MIMO_PS_STATIC:
 455         case IWL_MIMO_PS_DYNAMIC:
 456                 *idle_state = (is_cam) ? 2 : 1;
 457                 break;
 458         case IWL_MIMO_PS_NONE:
 459                 *idle_state = (is_cam) ? *rx_state : 1;
 460                 break;
 461         default:
 462                 *idle_state = 1;
 463                 break;
 464         }
 465
 466         return 0;
 467 }
 468
 469 int iwl4965_hw_rxq_stop(struct iwl_priv *priv)
 470 {
 471         int rc;
 472         unsigned long flags;
 473
 474         spin_lock_irqsave(&priv->lock, flags);
 475         rc = iwl_grab_nic_access(priv);
 476         if (rc) {
 477                 spin_unlock_irqrestore(&priv->lock, flags);
 478                 return rc;
 479         }
 480
 481         /* stop Rx DMA */
 482         iwl_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0);
 483         rc = iwl_poll_direct_bit(priv, FH_MEM_RSSR_RX_STATUS_REG,
 484                                      (1 << 24), 1000);
 485         if (rc < 0)
 486                 IWL_ERROR("Can't stop Rx DMA.\n");
 487
 488         iwl_release_nic_access(priv);
 489         spin_unlock_irqrestore(&priv->lock, flags);
 490
 491         return 0;
 492 }
 493
 494 u8 iwl4965_hw_find_station(struct iwl_priv *priv, const u8 *addr)
 495 {
 496         int i;
 497         int start = 0;
 498         int ret = IWL_INVALID_STATION;
 499         unsigned long flags;
 500         DECLARE_MAC_BUF(mac);
 501
 502         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) ||
 503             (priv->iw_mode == IEEE80211_IF_TYPE_AP))
 504                 start = IWL_STA_ID;
 505
 506         if (is_broadcast_ether_addr(addr))
 507                 return priv->hw_params.bcast_sta_id;
 508
 509         spin_lock_irqsave(&priv->sta_lock, flags);
 510         for (i = start; i < priv->hw_params.max_stations; i++)
 511                 if ((priv->stations[i].used) &&
 512                     (!compare_ether_addr
 513                      (priv->stations[i].sta.sta.addr, addr))) {
 514                         ret = i;
 515                         goto out;
 516                 }
 517
 518         IWL_DEBUG_ASSOC_LIMIT("can not find STA %s total %d\n",
 519                         print_mac(mac, addr), priv->num_stations);
 520
 521  out:
 522         spin_unlock_irqrestore(&priv->sta_lock, flags);
 523         return ret;
 524 }
 525
 526 static int iwl4965_nic_set_pwr_src(struct iwl_priv *priv, int pwr_max)
 527 {
 528         int ret;
 529         unsigned long flags;
 530
 531         spin_lock_irqsave(&priv->lock, flags);
 532         ret = iwl_grab_nic_access(priv);
 533         if (ret) {
 534                 spin_unlock_irqrestore(&priv->lock, flags);
 535                 return ret;
 536         }
 537
 538         if (!pwr_max) {
 539                 u32 val;
 540
 541                 ret = pci_read_config_dword(priv->pci_dev, PCI_POWER_SOURCE,
 542                                            &val);
 543
 544                 if (val & PCI_CFG_PMC_PME_FROM_D3COLD_SUPPORT)
 545                         iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 546                                 APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
 547                                 ~APMG_PS_CTRL_MSK_PWR_SRC);
 548         } else
 549                 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 550                         APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
 551                         ~APMG_PS_CTRL_MSK_PWR_SRC);
 552
 553         iwl_release_nic_access(priv);
 554         spin_unlock_irqrestore(&priv->lock, flags);
 555
 556         return ret;
 557 }
 558
 559 static int iwl4965_rx_init(struct iwl_priv *priv, struct iwl4965_rx_queue *rxq)
 560 {
 561         int ret;
 562         unsigned long flags;
 563         unsigned int rb_size;
 564
 565         spin_lock_irqsave(&priv->lock, flags);
 566         ret = iwl_grab_nic_access(priv);
 567         if (ret) {
 568                 spin_unlock_irqrestore(&priv->lock, flags);
 569                 return ret;
 570         }
 571
 572         if (priv->cfg->mod_params->amsdu_size_8K)
 573                 rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_8K;
 574         else
 575                 rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K;
 576
 577         /* Stop Rx DMA */
 578         iwl_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0);
 579
 580         /* Reset driver's Rx queue write index */
 581         iwl_write_direct32(priv, FH_RSCSR_CHNL0_RBDCB_WPTR_REG, 0);
 582
 583         /* Tell device where to find RBD circular buffer in DRAM */
 584         iwl_write_direct32(priv, FH_RSCSR_CHNL0_RBDCB_BASE_REG,
 585                            rxq->dma_addr >> 8);
 586
 587         /* Tell device where in DRAM to update its Rx status */
 588         iwl_write_direct32(priv, FH_RSCSR_CHNL0_STTS_WPTR_REG,
 589                            (priv->shared_phys +
 590                             offsetof(struct iwl4965_shared, rb_closed)) >> 4);
 591
 592         /* Enable Rx DMA, enable host interrupt, Rx buffer size 4k, 256 RBDs */
 593         iwl_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG,
 594                            FH_RCSR_RX_CONFIG_CHNL_EN_ENABLE_VAL |
 595                            FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_INT_HOST_VAL |
 596                            rb_size |
 597                              /* 0x10 << 4 | */
 598                            (RX_QUEUE_SIZE_LOG <<
 599                               FH_RCSR_RX_CONFIG_RBDCB_SIZE_BITSHIFT));
 600
 601         /*
 602          * iwl_write32(priv,CSR_INT_COAL_REG,0);
 603          */
 604
 605         iwl_release_nic_access(priv);
 606         spin_unlock_irqrestore(&priv->lock, flags);
 607
 608         return 0;
 609 }
 610
 611 /* Tell 4965 where to find the "keep warm" buffer */
 612 static int iwl4965_kw_init(struct iwl_priv *priv)
 613 {
 614         unsigned long flags;
 615         int rc;
 616
 617         spin_lock_irqsave(&priv->lock, flags);
 618         rc = iwl_grab_nic_access(priv);
 619         if (rc)
 620                 goto out;
 621
 622         iwl_write_direct32(priv, IWL_FH_KW_MEM_ADDR_REG,
 623                              priv->kw.dma_addr >> 4);
 624         iwl_release_nic_access(priv);
 625 out:
 626         spin_unlock_irqrestore(&priv->lock, flags);
 627         return rc;
 628 }
 629
 630 static int iwl4965_kw_alloc(struct iwl_priv *priv)
 631 {
 632         struct pci_dev *dev = priv->pci_dev;
 633         struct iwl4965_kw *kw = &priv->kw;
 634
 635         kw->size = IWL4965_KW_SIZE;     /* TBW need set somewhere else */
 636         kw->v_addr = pci_alloc_consistent(dev, kw->size, &kw->dma_addr);
 637         if (!kw->v_addr)
 638                 return -ENOMEM;
 639
 640         return 0;
 641 }
 642
 643 /**
 644  * iwl4965_kw_free - Free the "keep warm" buffer
 645  */
 646 static void iwl4965_kw_free(struct iwl_priv *priv)
 647 {
 648         struct pci_dev *dev = priv->pci_dev;
 649         struct iwl4965_kw *kw = &priv->kw;
 650
 651         if (kw->v_addr) {
 652                 pci_free_consistent(dev, kw->size, kw->v_addr, kw->dma_addr);
 653                 memset(kw, 0, sizeof(*kw));
 654         }
 655 }
 656
 657 /**
 658  * iwl4965_txq_ctx_reset - Reset TX queue context
 659  * Destroys all DMA structures and initialise them again
 660  *
 661  * @param priv
 662  * @return error code
 663  */
 664 static int iwl4965_txq_ctx_reset(struct iwl_priv *priv)
 665 {
 666         int rc = 0;
 667         int txq_id, slots_num;
 668         unsigned long flags;
 669
 670         iwl4965_kw_free(priv);
 671
 672         /* Free all tx/cmd queues and keep-warm buffer */
 673         iwl4965_hw_txq_ctx_free(priv);
 674
 675         /* Alloc keep-warm buffer */
 676         rc = iwl4965_kw_alloc(priv);
 677         if (rc) {
 678                 IWL_ERROR("Keep Warm allocation failed");
 679                 goto error_kw;
 680         }
 681
 682         spin_lock_irqsave(&priv->lock, flags);
 683
 684         rc = iwl_grab_nic_access(priv);
 685         if (unlikely(rc)) {
 686                 IWL_ERROR("TX reset failed");
 687                 spin_unlock_irqrestore(&priv->lock, flags);
 688                 goto error_reset;
 689         }
 690
 691         /* Turn off all Tx DMA channels */
 692         iwl_write_prph(priv, IWL49_SCD_TXFACT, 0);
 693         iwl_release_nic_access(priv);
 694         spin_unlock_irqrestore(&priv->lock, flags);
 695
 696         /* Tell 4965 where to find the keep-warm buffer */
 697         rc = iwl4965_kw_init(priv);
 698         if (rc) {
 699                 IWL_ERROR("kw_init failed\n");
 700                 goto error_reset;
 701         }
 702
 703         /* Alloc and init all (default 16) Tx queues,
 704          * including the command queue (#4) */
 705         for (txq_id = 0; txq_id < priv->hw_params.max_txq_num; txq_id++) {
 706                 slots_num = (txq_id == IWL_CMD_QUEUE_NUM) ?
 707                                         TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS;
 708                 rc = iwl4965_tx_queue_init(priv, &priv->txq[txq_id], slots_num,
 709                                        txq_id);
 710                 if (rc) {
 711                         IWL_ERROR("Tx %d queue init failed\n", txq_id);
 712                         goto error;
 713                 }
 714         }
 715
 716         return rc;
 717
 718  error:
 719         iwl4965_hw_txq_ctx_free(priv);
 720  error_reset:
 721         iwl4965_kw_free(priv);
 722  error_kw:
 723         return rc;
 724 }
 725
 726 int iwl4965_hw_nic_init(struct iwl_priv *priv)
 727 {
 728         int rc;
 729         unsigned long flags;
 730         struct iwl4965_rx_queue *rxq = &priv->rxq;
 731         u8 rev_id;
 732         u32 val;
 733         u8 val_link;
 734
 735         iwl4965_power_init_handle(priv);
 736
 737         /* nic_init */
 738         spin_lock_irqsave(&priv->lock, flags);
 739
 740         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
 741                     CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
 742
 743         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 744         rc = iwl_poll_bit(priv, CSR_GP_CNTRL,
 745                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
 746                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
 747         if (rc < 0) {
 748                 spin_unlock_irqrestore(&priv->lock, flags);
 749                 IWL_DEBUG_INFO("Failed to init the card\n");
 750                 return rc;
 751         }
 752
 753         rc = iwl_grab_nic_access(priv);
 754         if (rc) {
 755                 spin_unlock_irqrestore(&priv->lock, flags);
 756                 return rc;
 757         }
 758
 759         iwl_read_prph(priv, APMG_CLK_CTRL_REG);
 760
 761         iwl_write_prph(priv, APMG_CLK_CTRL_REG,
 762                         APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
 763         iwl_read_prph(priv, APMG_CLK_CTRL_REG);
 764
 765         udelay(20);
 766
 767         iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
 768                                 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
 769
 770         iwl_release_nic_access(priv);
 771         iwl_write32(priv, CSR_INT_COALESCING, 512 / 32);
 772         spin_unlock_irqrestore(&priv->lock, flags);
 773
 774         /* Determine HW type */
 775         rc = pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &rev_id);
 776         if (rc)
 777                 return rc;
 778
 779         IWL_DEBUG_INFO("HW Revision ID = 0x%X\n", rev_id);
 780
 781         iwl4965_nic_set_pwr_src(priv, 1);
 782         spin_lock_irqsave(&priv->lock, flags);
 783
 784         if ((rev_id & 0x80) == 0x80 && (rev_id & 0x7f) < 8) {
 785                 pci_read_config_dword(priv->pci_dev, PCI_REG_WUM8, &val);
 786                 /* Enable No Snoop field */
 787                 pci_write_config_dword(priv->pci_dev, PCI_REG_WUM8,
 788                                        val & ~(1 << 11));
 789         }
 790
 791         spin_unlock_irqrestore(&priv->lock, flags);
 792
 793         if (priv->eeprom.calib_version < EEPROM_TX_POWER_VERSION_NEW) {
 794                 IWL_ERROR("Older EEPROM detected!  Aborting.\n");
 795                 return -EINVAL;
 796         }
 797
 798         pci_read_config_byte(priv->pci_dev, PCI_LINK_CTRL, &val_link);
 799
 800         /* disable L1 entry -- workaround for pre-B1 */
 801         pci_write_config_byte(priv->pci_dev, PCI_LINK_CTRL, val_link & ~0x02);
 802
 803         spin_lock_irqsave(&priv->lock, flags);
 804
 805         /* set CSR_HW_CONFIG_REG for uCode use */
 806
 807         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
 808                     CSR49_HW_IF_CONFIG_REG_BIT_4965_R |
 809                     CSR49_HW_IF_CONFIG_REG_BIT_RADIO_SI |
 810                     CSR49_HW_IF_CONFIG_REG_BIT_MAC_SI);
 811
 812         rc = iwl_grab_nic_access(priv);
 813         if (rc < 0) {
 814                 spin_unlock_irqrestore(&priv->lock, flags);
 815                 IWL_DEBUG_INFO("Failed to init the card\n");
 816                 return rc;
 817         }
 818
 819         iwl_read_prph(priv, APMG_PS_CTRL_REG);
 820         iwl_set_bits_prph(priv, APMG_PS_CTRL_REG, APMG_PS_CTRL_VAL_RESET_REQ);
 821         udelay(5);
 822         iwl_clear_bits_prph(priv, APMG_PS_CTRL_REG, APMG_PS_CTRL_VAL_RESET_REQ);
 823
 824         iwl_release_nic_access(priv);
 825         spin_unlock_irqrestore(&priv->lock, flags);
 826
 827         iwl4965_hw_card_show_info(priv);
 828
 829         /* end nic_init */
 830
 831         /* Allocate the RX queue, or reset if it is already allocated */
 832         if (!rxq->bd) {
 833                 rc = iwl4965_rx_queue_alloc(priv);
 834                 if (rc) {
 835                         IWL_ERROR("Unable to initialize Rx queue\n");
 836                         return -ENOMEM;
 837                 }
 838         } else
 839                 iwl4965_rx_queue_reset(priv, rxq);
 840
 841         iwl4965_rx_replenish(priv);
 842
 843         iwl4965_rx_init(priv, rxq);
 844
 845         spin_lock_irqsave(&priv->lock, flags);
 846
 847         rxq->need_update = 1;
 848         iwl4965_rx_queue_update_write_ptr(priv, rxq);
 849
 850         spin_unlock_irqrestore(&priv->lock, flags);
 851
 852         /* Allocate and init all Tx and Command queues */
 853         rc = iwl4965_txq_ctx_reset(priv);
 854         if (rc)
 855                 return rc;
 856
 857         if (priv->eeprom.sku_cap & EEPROM_SKU_CAP_SW_RF_KILL_ENABLE)
 858                 IWL_DEBUG_RF_KILL("SW RF KILL supported in EEPROM.\n");
 859
 860         if (priv->eeprom.sku_cap & EEPROM_SKU_CAP_HW_RF_KILL_ENABLE)
 861                 IWL_DEBUG_RF_KILL("HW RF KILL supported in EEPROM.\n");
 862
 863         set_bit(STATUS_INIT, &priv->status);
 864
 865         return 0;
 866 }
 867
 868 int iwl4965_hw_nic_stop_master(struct iwl_priv *priv)
 869 {
 870         int rc = 0;
 871         u32 reg_val;
 872         unsigned long flags;
 873
 874         spin_lock_irqsave(&priv->lock, flags);
 875
 876         /* set stop master bit */
 877         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
 878
 879         reg_val = iwl_read32(priv, CSR_GP_CNTRL);
 880
 881         if (CSR_GP_CNTRL_REG_FLAG_MAC_POWER_SAVE ==
 882             (reg_val & CSR_GP_CNTRL_REG_MSK_POWER_SAVE_TYPE))
 883                 IWL_DEBUG_INFO("Card in power save, master is already "
 884                                "stopped\n");
 885         else {
 886                 rc = iwl_poll_bit(priv, CSR_RESET,
 887                                   CSR_RESET_REG_FLAG_MASTER_DISABLED,
 888                                   CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
 889                 if (rc < 0) {
 890                         spin_unlock_irqrestore(&priv->lock, flags);
 891                         return rc;
 892                 }
 893         }
 894
 895         spin_unlock_irqrestore(&priv->lock, flags);
 896         IWL_DEBUG_INFO("stop master\n");
 897
 898         return rc;
 899 }
 900
 901 /**
 902  * iwl4965_hw_txq_ctx_stop - Stop all Tx DMA channels, free Tx queue memory
 903  */
 904 void iwl4965_hw_txq_ctx_stop(struct iwl_priv *priv)
 905 {
 906
 907         int txq_id;
 908         unsigned long flags;
 909
 910         /* Stop each Tx DMA channel, and wait for it to be idle */
 911         for (txq_id = 0; txq_id < priv->hw_params.max_txq_num; txq_id++) {
 912                 spin_lock_irqsave(&priv->lock, flags);
 913                 if (iwl_grab_nic_access(priv)) {
 914                         spin_unlock_irqrestore(&priv->lock, flags);
 915                         continue;
 916                 }
 917
 918                 iwl_write_direct32(priv,
 919                                    IWL_FH_TCSR_CHNL_TX_CONFIG_REG(txq_id), 0x0);
 920                 iwl_poll_direct_bit(priv, IWL_FH_TSSR_TX_STATUS_REG,
 921                                     IWL_FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE
 922                                     (txq_id), 200);
 923                 iwl_release_nic_access(priv);
 924                 spin_unlock_irqrestore(&priv->lock, flags);
 925         }
 926
 927         /* Deallocate memory for all Tx queues */
 928         iwl4965_hw_txq_ctx_free(priv);
 929 }
 930
 931 int iwl4965_hw_nic_reset(struct iwl_priv *priv)
 932 {
 933         int rc = 0;
 934         unsigned long flags;
 935
 936         iwl4965_hw_nic_stop_master(priv);
 937
 938         spin_lock_irqsave(&priv->lock, flags);
 939
 940         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
 941
 942         udelay(10);
 943
 944         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 945         rc = iwl_poll_bit(priv, CSR_RESET,
 946                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
 947                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25);
 948
 949         udelay(10);
 950
 951         rc = iwl_grab_nic_access(priv);
 952         if (!rc) {
 953                 iwl_write_prph(priv, APMG_CLK_EN_REG,
 954                                 APMG_CLK_VAL_DMA_CLK_RQT |
 955                                 APMG_CLK_VAL_BSM_CLK_RQT);
 956
 957                 udelay(10);
 958
 959                 iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
 960                                         APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
 961
 962                 iwl_release_nic_access(priv);
 963         }
 964
 965         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
 966         wake_up_interruptible(&priv->wait_command_queue);
 967
 968         spin_unlock_irqrestore(&priv->lock, flags);
 969
 970         return rc;
 971
 972 }
 973
 974 #define REG_RECALIB_PERIOD (60)
 975
 976 /**
 977  * iwl4965_bg_statistics_periodic - Timer callback to queue statistics
 978  *
 979  * This callback is provided in order to send a statistics request.
 980  *
 981  * This timer function is continually reset to execute within
 982  * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
 983  * was received.  We need to ensure we receive the statistics in order
 984  * to update the temperature used for calibrating the TXPOWER.
 985  */
 986 static void iwl4965_bg_statistics_periodic(unsigned long data)
 987 {
 988         struct iwl_priv *priv = (struct iwl_priv *)data;
 989
 990         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 991                 return;
 992
 993         iwl_send_statistics_request(priv, CMD_ASYNC);
 994 }
 995
 996 #define CT_LIMIT_CONST          259
 997 #define TM_CT_KILL_THRESHOLD    110
 998
 999 void iwl4965_rf_kill_ct_config(struct iwl_priv *priv)
1000 {
1001         struct iwl4965_ct_kill_config cmd;
1002         u32 R1, R2, R3;
1003         u32 temp_th;
1004         u32 crit_temperature;
1005         unsigned long flags;
1006         int ret = 0;
1007
1008         spin_lock_irqsave(&priv->lock, flags);
1009         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
1010                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
1011         spin_unlock_irqrestore(&priv->lock, flags);
1012
1013         if (priv->statistics.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK) {
1014                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[1]);
1015                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[1]);
1016                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[1]);
1017         } else {
1018                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[0]);
1019                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[0]);
1020                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[0]);
1021         }
1022
1023         temp_th = CELSIUS_TO_KELVIN(TM_CT_KILL_THRESHOLD);
1024
1025         crit_temperature = ((temp_th * (R3-R1))/CT_LIMIT_CONST) + R2;
1026         cmd.critical_temperature_R =  cpu_to_le32(crit_temperature);
1027         ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
1028                                sizeof(cmd), &cmd);
1029         if (ret)
1030                 IWL_ERROR("REPLY_CT_KILL_CONFIG_CMD failed\n");
1031         else
1032                 IWL_DEBUG_INFO("REPLY_CT_KILL_CONFIG_CMD succeeded\n");
1033 }
1034
1035 #ifdef CONFIG_IWL4965_SENSITIVITY
1036
1037 /* "false alarms" are signals that our DSP tries to lock onto,
1038  *   but then determines that they are either noise, or transmissions
1039  *   from a distant wireless network (also "noise", really) that get
1040  *   "stepped on" by stronger transmissions within our own network.
1041  * This algorithm attempts to set a sensitivity level that is high
1042  *   enough to receive all of our own network traffic, but not so
1043  *   high that our DSP gets too busy trying to lock onto non-network
1044  *   activity/noise. */
1045 static int iwl4965_sens_energy_cck(struct iwl_priv *priv,
1046                                    u32 norm_fa,
1047                                    u32 rx_enable_time,
1048                                    struct statistics_general_data *rx_info)
1049 {
1050         u32 max_nrg_cck = 0;
1051         int i = 0;
1052         u8 max_silence_rssi = 0;
1053         u32 silence_ref = 0;
1054         u8 silence_rssi_a = 0;
1055         u8 silence_rssi_b = 0;
1056         u8 silence_rssi_c = 0;
1057         u32 val;
1058
1059         /* "false_alarms" values below are cross-multiplications to assess the
1060          *   numbers of false alarms within the measured period of actual Rx
1061          *   (Rx is off when we're txing), vs the min/max expected false alarms
1062          *   (some should be expected if rx is sensitive enough) in a
1063          *   hypothetical listening period of 200 time units (TU), 204.8 msec:
1064          *
1065          * MIN_FA/fixed-time < false_alarms/actual-rx-time < MAX_FA/beacon-time
1066          *
1067          * */
1068         u32 false_alarms = norm_fa * 200 * 1024;
1069         u32 max_false_alarms = MAX_FA_CCK * rx_enable_time;
1070         u32 min_false_alarms = MIN_FA_CCK * rx_enable_time;
1071         struct iwl4965_sensitivity_data *data = NULL;
1072
1073         data = &(priv->sensitivity_data);
1074
1075         data->nrg_auto_corr_silence_diff = 0;
1076
1077         /* Find max silence rssi among all 3 receivers.
1078          * This is background noise, which may include transmissions from other
1079          *    networks, measured during silence before our network's beacon */
1080         silence_rssi_a = (u8)((rx_info->beacon_silence_rssi_a &
1081                             ALL_BAND_FILTER) >> 8);
1082         silence_rssi_b = (u8)((rx_info->beacon_silence_rssi_b &
1083                             ALL_BAND_FILTER) >> 8);
1084         silence_rssi_c = (u8)((rx_info->beacon_silence_rssi_c &
1085                             ALL_BAND_FILTER) >> 8);
1086
1087         val = max(silence_rssi_b, silence_rssi_c);
1088         max_silence_rssi = max(silence_rssi_a, (u8) val);
1089
1090         /* Store silence rssi in 20-beacon history table */
1091         data->nrg_silence_rssi[data->nrg_silence_idx] = max_silence_rssi;
1092         data->nrg_silence_idx++;
1093         if (data->nrg_silence_idx >= NRG_NUM_PREV_STAT_L)
1094                 data->nrg_silence_idx = 0;
1095
1096         /* Find max silence rssi across 20 beacon history */
1097         for (i = 0; i < NRG_NUM_PREV_STAT_L; i++) {
1098                 val = data->nrg_silence_rssi[i];
1099                 silence_ref = max(silence_ref, val);
1100         }
1101         IWL_DEBUG_CALIB("silence a %u, b %u, c %u, 20-bcn max %u\n",
1102                         silence_rssi_a, silence_rssi_b, silence_rssi_c,
1103                         silence_ref);
1104
1105         /* Find max rx energy (min value!) among all 3 receivers,
1106          *   measured during beacon frame.
1107          * Save it in 10-beacon history table. */
1108         i = data->nrg_energy_idx;
1109         val = min(rx_info->beacon_energy_b, rx_info->beacon_energy_c);
1110         data->nrg_value[i] = min(rx_info->beacon_energy_a, val);
1111
1112         data->nrg_energy_idx++;
1113         if (data->nrg_energy_idx >= 10)
1114                 data->nrg_energy_idx = 0;
1115
1116         /* Find min rx energy (max value) across 10 beacon history.
1117          * This is the minimum signal level that we want to receive well.
1118          * Add backoff (margin so we don't miss slightly lower energy frames).
1119          * This establishes an upper bound (min value) for energy threshold. */
1120         max_nrg_cck = data->nrg_value[0];
1121         for (i = 1; i < 10; i++)
1122                 max_nrg_cck = (u32) max(max_nrg_cck, (data->nrg_value[i]));
1123         max_nrg_cck += 6;
1124
1125         IWL_DEBUG_CALIB("rx energy a %u, b %u, c %u, 10-bcn max/min %u\n",
1126                         rx_info->beacon_energy_a, rx_info->beacon_energy_b,
1127                         rx_info->beacon_energy_c, max_nrg_cck - 6);
1128
1129         /* Count number of consecutive beacons with fewer-than-desired
1130          *   false alarms. */
1131         if (false_alarms < min_false_alarms)
1132                 data->num_in_cck_no_fa++;
1133         else
1134                 data->num_in_cck_no_fa = 0;
1135         IWL_DEBUG_CALIB("consecutive bcns with few false alarms = %u\n",
1136                         data->num_in_cck_no_fa);
1137
1138         /* If we got too many false alarms this time, reduce sensitivity */
1139         if (false_alarms > max_false_alarms) {
1140                 IWL_DEBUG_CALIB("norm FA %u > max FA %u\n",
1141                              false_alarms, max_false_alarms);
1142                 IWL_DEBUG_CALIB("... reducing sensitivity\n");
1143                 data->nrg_curr_state = IWL_FA_TOO_MANY;
1144
1145                 if (data->auto_corr_cck > AUTO_CORR_MAX_TH_CCK) {
1146                         /* Store for "fewer than desired" on later beacon */
1147                         data->nrg_silence_ref = silence_ref;
1148
1149                         /* increase energy threshold (reduce nrg value)
1150                          *   to decrease sensitivity */
1151                         if (data->nrg_th_cck > (NRG_MAX_CCK + NRG_STEP_CCK))
1152                                 data->nrg_th_cck = data->nrg_th_cck
1153                                                          - NRG_STEP_CCK;
1154                 }
1155
1156                 /* increase auto_corr values to decrease sensitivity */
1157                 if (data->auto_corr_cck < AUTO_CORR_MAX_TH_CCK)
1158                         data->auto_corr_cck = AUTO_CORR_MAX_TH_CCK + 1;
1159                 else {
1160                         val = data->auto_corr_cck + AUTO_CORR_STEP_CCK;
1161                         data->auto_corr_cck = min((u32)AUTO_CORR_MAX_CCK, val);
1162                 }
1163                 val = data->auto_corr_cck_mrc + AUTO_CORR_STEP_CCK;
1164                 data->auto_corr_cck_mrc = min((u32)AUTO_CORR_MAX_CCK_MRC, val);
1165
1166         /* Else if we got fewer than desired, increase sensitivity */
1167         } else if (false_alarms < min_false_alarms) {
1168                 data->nrg_curr_state = IWL_FA_TOO_FEW;
1169
1170                 /* Compare silence level with silence level for most recent
1171                  *   healthy number or too many false alarms */
1172                 data->nrg_auto_corr_silence_diff = (s32)data->nrg_silence_ref -
1173                                                    (s32)silence_ref;
1174
1175                 IWL_DEBUG_CALIB("norm FA %u < min FA %u, silence diff %d\n",
1176                          false_alarms, min_false_alarms,
1177                          data->nrg_auto_corr_silence_diff);
1178
1179                 /* Increase value to increase sensitivity, but only if:
1180                  * 1a) previous beacon did *not* have *too many* false alarms
1181                  * 1b) AND there's a significant difference in Rx levels
1182                  *      from a previous beacon with too many, or healthy # FAs
1183                  * OR 2) We've seen a lot of beacons (100) with too few
1184                  *       false alarms */
1185                 if ((data->nrg_prev_state != IWL_FA_TOO_MANY) &&
1186                         ((data->nrg_auto_corr_silence_diff > NRG_DIFF) ||
1187                         (data->num_in_cck_no_fa > MAX_NUMBER_CCK_NO_FA))) {
1188
1189                         IWL_DEBUG_CALIB("... increasing sensitivity\n");
1190                         /* Increase nrg value to increase sensitivity */
1191                         val = data->nrg_th_cck + NRG_STEP_CCK;
1192                         data->nrg_th_cck = min((u32)NRG_MIN_CCK, val);
1193
1194                         /* Decrease auto_corr values to increase sensitivity */
1195                         val = data->auto_corr_cck - AUTO_CORR_STEP_CCK;
1196                         data->auto_corr_cck = max((u32)AUTO_CORR_MIN_CCK, val);
1197
1198                         val = data->auto_corr_cck_mrc - AUTO_CORR_STEP_CCK;
1199                         data->auto_corr_cck_mrc =
1200                                          max((u32)AUTO_CORR_MIN_CCK_MRC, val);
1201
1202                 } else
1203                         IWL_DEBUG_CALIB("... but not changing sensitivity\n");
1204
1205         /* Else we got a healthy number of false alarms, keep status quo */
1206         } else {
1207                 IWL_DEBUG_CALIB(" FA in safe zone\n");
1208                 data->nrg_curr_state = IWL_FA_GOOD_RANGE;
1209
1210                 /* Store for use in "fewer than desired" with later beacon */
1211                 data->nrg_silence_ref = silence_ref;
1212
1213                 /* If previous beacon had too many false alarms,
1214                  *   give it some extra margin by reducing sensitivity again
1215                  *   (but don't go below measured energy of desired Rx) */
1216                 if (IWL_FA_TOO_MANY == data->nrg_prev_state) {
1217                         IWL_DEBUG_CALIB("... increasing margin\n");
1218                         data->nrg_th_cck -= NRG_MARGIN;
1219                 }
1220         }
1221
1222         /* Make sure the energy threshold does not go above the measured
1223          * energy of the desired Rx signals (reduced by backoff margin),
1224          * or else we might start missing Rx frames.
1225          * Lower value is higher energy, so we use max()!
1226          */
1227         data->nrg_th_cck = max(max_nrg_cck, data->nrg_th_cck);
1228         IWL_DEBUG_CALIB("new nrg_th_cck %u\n", data->nrg_th_cck);
1229
1230         data->nrg_prev_state = data->nrg_curr_state;
1231
1232         return 0;
1233 }
1234
1235
1236 static int iwl4965_sens_auto_corr_ofdm(struct iwl_priv *priv,
1237                                        u32 norm_fa,
1238                                        u32 rx_enable_time)
1239 {
1240         u32 val;
1241         u32 false_alarms = norm_fa * 200 * 1024;
1242         u32 max_false_alarms = MAX_FA_OFDM * rx_enable_time;
1243         u32 min_false_alarms = MIN_FA_OFDM * rx_enable_time;
1244         struct iwl4965_sensitivity_data *data = NULL;
1245
1246         data = &(priv->sensitivity_data);
1247
1248         /* If we got too many false alarms this time, reduce sensitivity */
1249         if (false_alarms > max_false_alarms) {
1250
1251                 IWL_DEBUG_CALIB("norm FA %u > max FA %u)\n",
1252                              false_alarms, max_false_alarms);
1253
1254                 val = data->auto_corr_ofdm + AUTO_CORR_STEP_OFDM;
1255                 data->auto_corr_ofdm =
1256                                 min((u32)AUTO_CORR_MAX_OFDM, val);
1257
1258                 val = data->auto_corr_ofdm_mrc + AUTO_CORR_STEP_OFDM;
1259                 data->auto_corr_ofdm_mrc =
1260                                 min((u32)AUTO_CORR_MAX_OFDM_MRC, val);
1261
1262                 val = data->auto_corr_ofdm_x1 + AUTO_CORR_STEP_OFDM;
1263                 data->auto_corr_ofdm_x1 =
1264                                 min((u32)AUTO_CORR_MAX_OFDM_X1, val);
1265
1266                 val = data->auto_corr_ofdm_mrc_x1 + AUTO_CORR_STEP_OFDM;
1267                 data->auto_corr_ofdm_mrc_x1 =
1268                                 min((u32)AUTO_CORR_MAX_OFDM_MRC_X1, val);
1269         }
1270
1271         /* Else if we got fewer than desired, increase sensitivity */
1272         else if (false_alarms < min_false_alarms) {
1273
1274                 IWL_DEBUG_CALIB("norm FA %u < min FA %u\n",
1275                              false_alarms, min_false_alarms);
1276
1277                 val = data->auto_corr_ofdm - AUTO_CORR_STEP_OFDM;
1278                 data->auto_corr_ofdm =
1279                                 max((u32)AUTO_CORR_MIN_OFDM, val);
1280
1281                 val = data->auto_corr_ofdm_mrc - AUTO_CORR_STEP_OFDM;
1282                 data->auto_corr_ofdm_mrc =
1283                                 max((u32)AUTO_CORR_MIN_OFDM_MRC, val);
1284
1285                 val = data->auto_corr_ofdm_x1 - AUTO_CORR_STEP_OFDM;
1286                 data->auto_corr_ofdm_x1 =
1287                                 max((u32)AUTO_CORR_MIN_OFDM_X1, val);
1288
1289                 val = data->auto_corr_ofdm_mrc_x1 - AUTO_CORR_STEP_OFDM;
1290                 data->auto_corr_ofdm_mrc_x1 =
1291                                 max((u32)AUTO_CORR_MIN_OFDM_MRC_X1, val);
1292         }
1293
1294         else
1295                 IWL_DEBUG_CALIB("min FA %u < norm FA %u < max FA %u OK\n",
1296                          min_false_alarms, false_alarms, max_false_alarms);
1297
1298         return 0;
1299 }
1300
1301 static int iwl4965_sensitivity_callback(struct iwl_priv *priv,
1302                                     struct iwl_cmd *cmd, struct sk_buff *skb)
1303 {
1304         /* We didn't cache the SKB; let the caller free it */
1305         return 1;
1306 }
1307
1308 /* Prepare a SENSITIVITY_CMD, send to uCode if values have changed */
1309 static int iwl4965_sensitivity_write(struct iwl_priv *priv, u8 flags)
1310 {
1311         struct iwl4965_sensitivity_cmd cmd ;
1312         struct iwl4965_sensitivity_data *data = NULL;
1313         struct iwl_host_cmd cmd_out = {
1314                 .id = SENSITIVITY_CMD,
1315                 .len = sizeof(struct iwl4965_sensitivity_cmd),
1316                 .meta.flags = flags,
1317                 .data = &cmd,
1318         };
1319         int ret;
1320
1321         data = &(priv->sensitivity_data);
1322
1323         memset(&cmd, 0, sizeof(cmd));
1324
1325         cmd.table[HD_AUTO_CORR32_X4_TH_ADD_MIN_INDEX] =
1326                                 cpu_to_le16((u16)data->auto_corr_ofdm);
1327         cmd.table[HD_AUTO_CORR32_X4_TH_ADD_MIN_MRC_INDEX] =
1328                                 cpu_to_le16((u16)data->auto_corr_ofdm_mrc);
1329         cmd.table[HD_AUTO_CORR32_X1_TH_ADD_MIN_INDEX] =
1330                                 cpu_to_le16((u16)data->auto_corr_ofdm_x1);
1331         cmd.table[HD_AUTO_CORR32_X1_TH_ADD_MIN_MRC_INDEX] =
1332                                 cpu_to_le16((u16)data->auto_corr_ofdm_mrc_x1);
1333
1334         cmd.table[HD_AUTO_CORR40_X4_TH_ADD_MIN_INDEX] =
1335                                 cpu_to_le16((u16)data->auto_corr_cck);
1336         cmd.table[HD_AUTO_CORR40_X4_TH_ADD_MIN_MRC_INDEX] =
1337                                 cpu_to_le16((u16)data->auto_corr_cck_mrc);
1338
1339         cmd.table[HD_MIN_ENERGY_CCK_DET_INDEX] =
1340                                 cpu_to_le16((u16)data->nrg_th_cck);
1341         cmd.table[HD_MIN_ENERGY_OFDM_DET_INDEX] =
1342                                 cpu_to_le16((u16)data->nrg_th_ofdm);
1343
1344         cmd.table[HD_BARKER_CORR_TH_ADD_MIN_INDEX] =
1345                                 __constant_cpu_to_le16(190);
1346         cmd.table[HD_BARKER_CORR_TH_ADD_MIN_MRC_INDEX] =
1347                                 __constant_cpu_to_le16(390);
1348         cmd.table[HD_OFDM_ENERGY_TH_IN_INDEX] =
1349                                 __constant_cpu_to_le16(62);
1350
1351         IWL_DEBUG_CALIB("ofdm: ac %u mrc %u x1 %u mrc_x1 %u thresh %u\n",
1352                         data->auto_corr_ofdm, data->auto_corr_ofdm_mrc,
1353                         data->auto_corr_ofdm_x1, data->auto_corr_ofdm_mrc_x1,
1354                         data->nrg_th_ofdm);
1355
1356         IWL_DEBUG_CALIB("cck: ac %u mrc %u thresh %u\n",
1357                         data->auto_corr_cck, data->auto_corr_cck_mrc,
1358                         data->nrg_th_cck);
1359
1360         /* Update uCode's "work" table, and copy it to DSP */
1361         cmd.control = SENSITIVITY_CMD_CONTROL_WORK_TABLE;
1362
1363         if (flags & CMD_ASYNC)
1364                 cmd_out.meta.u.callback = iwl4965_sensitivity_callback;
1365
1366         /* Don't send command to uCode if nothing has changed */
1367         if (!memcmp(&cmd.table[0], &(priv->sensitivity_tbl[0]),
1368                     sizeof(u16)*HD_TABLE_SIZE)) {
1369                 IWL_DEBUG_CALIB("No change in SENSITIVITY_CMD\n");
1370                 return 0;
1371         }
1372
1373         /* Copy table for comparison next time */
1374         memcpy(&(priv->sensitivity_tbl[0]), &(cmd.table[0]),
1375                sizeof(u16)*HD_TABLE_SIZE);
1376
1377         ret = iwl_send_cmd(priv, &cmd_out);
1378         if (ret)
1379                 IWL_ERROR("SENSITIVITY_CMD failed\n");
1380
1381         return ret;
1382 }
1383
1384 void iwl4965_init_sensitivity(struct iwl_priv *priv, u8 flags, u8 force)
1385 {
1386         struct iwl4965_sensitivity_data *data = NULL;
1387         int i;
1388         int ret  = 0;
1389
1390         IWL_DEBUG_CALIB("Start iwl4965_init_sensitivity\n");
1391
1392         if (force)
1393                 memset(&(priv->sensitivity_tbl[0]), 0,
1394                         sizeof(u16)*HD_TABLE_SIZE);
1395
1396         /* Clear driver's sensitivity algo data */
1397         data = &(priv->sensitivity_data);
1398         memset(data, 0, sizeof(struct iwl4965_sensitivity_data));
1399
1400         data->num_in_cck_no_fa = 0;
1401         data->nrg_curr_state = IWL_FA_TOO_MANY;
1402         data->nrg_prev_state = IWL_FA_TOO_MANY;
1403         data->nrg_silence_ref = 0;
1404         data->nrg_silence_idx = 0;
1405         data->nrg_energy_idx = 0;
1406
1407         for (i = 0; i < 10; i++)
1408                 data->nrg_value[i] = 0;
1409
1410         for (i = 0; i < NRG_NUM_PREV_STAT_L; i++)
1411                 data->nrg_silence_rssi[i] = 0;
1412
1413         data->auto_corr_ofdm = 90;
1414         data->auto_corr_ofdm_mrc = 170;
1415         data->auto_corr_ofdm_x1  = 105;
1416         data->auto_corr_ofdm_mrc_x1 = 220;
1417         data->auto_corr_cck = AUTO_CORR_CCK_MIN_VAL_DEF;
1418         data->auto_corr_cck_mrc = 200;
1419         data->nrg_th_cck = 100;
1420         data->nrg_th_ofdm = 100;
1421
1422         data->last_bad_plcp_cnt_ofdm = 0;
1423         data->last_fa_cnt_ofdm = 0;
1424         data->last_bad_plcp_cnt_cck = 0;
1425         data->last_fa_cnt_cck = 0;
1426
1427         /* Clear prior Sensitivity command data to force send to uCode */
1428         if (force)
1429                 memset(&(priv->sensitivity_tbl[0]), 0,
1430                     sizeof(u16)*HD_TABLE_SIZE);
1431
1432         ret |= iwl4965_sensitivity_write(priv, flags);
1433         IWL_DEBUG_CALIB("<<return 0x%X\n", ret);
1434
1435         return;
1436 }
1437
1438
1439 /* Reset differential Rx gains in NIC to prepare for chain noise calibration.
1440  * Called after every association, but this runs only once!
1441  *  ... once chain noise is calibrated the first time, it's good forever.  */
1442 void iwl4965_chain_noise_reset(struct iwl_priv *priv)
1443 {
1444         struct iwl4965_chain_noise_data *data = NULL;
1445
1446         data = &(priv->chain_noise_data);
1447         if ((data->state == IWL_CHAIN_NOISE_ALIVE) && iwl_is_associated(priv)) {
1448                 struct iwl4965_calibration_cmd cmd;
1449
1450                 memset(&cmd, 0, sizeof(cmd));
1451                 cmd.opCode = PHY_CALIBRATE_DIFF_GAIN_CMD;
1452                 cmd.diff_gain_a = 0;
1453                 cmd.diff_gain_b = 0;
1454                 cmd.diff_gain_c = 0;
1455                 iwl_send_cmd_pdu_async(priv, REPLY_PHY_CALIBRATION_CMD,
1456                                  sizeof(cmd), &cmd, NULL);
1457                 msleep(4);
1458                 data->state = IWL_CHAIN_NOISE_ACCUMULATE;
1459                 IWL_DEBUG_CALIB("Run chain_noise_calibrate\n");
1460         }
1461         return;
1462 }
1463
1464 /*
1465  * Accumulate 20 beacons of signal and noise statistics for each of
1466  *   3 receivers/antennas/rx-chains, then figure out:
1467  * 1)  Which antennas are connected.
1468  * 2)  Differential rx gain settings to balance the 3 receivers.
1469  */
1470 static void iwl4965_noise_calibration(struct iwl_priv *priv,
1471                                       struct iwl4965_notif_statistics *stat_resp)
1472 {
1473         struct iwl4965_chain_noise_data *data = NULL;
1474         int ret = 0;
1475
1476         u32 chain_noise_a;
1477         u32 chain_noise_b;
1478         u32 chain_noise_c;
1479         u32 chain_sig_a;
1480         u32 chain_sig_b;
1481         u32 chain_sig_c;
1482         u32 average_sig[NUM_RX_CHAINS] = {INITIALIZATION_VALUE};
1483         u32 average_noise[NUM_RX_CHAINS] = {INITIALIZATION_VALUE};
1484         u32 max_average_sig;
1485         u16 max_average_sig_antenna_i;
1486         u32 min_average_noise = MIN_AVERAGE_NOISE_MAX_VALUE;
1487         u16 min_average_noise_antenna_i = INITIALIZATION_VALUE;
1488         u16 i = 0;
1489         u16 chan_num = INITIALIZATION_VALUE;
1490         u32 band = INITIALIZATION_VALUE;
1491         u32 active_chains = 0;
1492         unsigned long flags;
1493         struct statistics_rx_non_phy *rx_info = &(stat_resp->rx.general);
1494
1495         data = &(priv->chain_noise_data);
1496
1497         /* Accumulate just the first 20 beacons after the first association,
1498          *   then we're done forever. */
1499         if (data->state != IWL_CHAIN_NOISE_ACCUMULATE) {
1500                 if (data->state == IWL_CHAIN_NOISE_ALIVE)
1501                         IWL_DEBUG_CALIB("Wait for noise calib reset\n");
1502                 return;
1503         }
1504
1505         spin_lock_irqsave(&priv->lock, flags);
1506         if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) {
1507                 IWL_DEBUG_CALIB(" << Interference data unavailable\n");
1508                 spin_unlock_irqrestore(&priv->lock, flags);
1509                 return;
1510         }
1511
1512         band = (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) ? 0 : 1;
1513         chan_num = le16_to_cpu(priv->staging_rxon.channel);
1514
1515         /* Make sure we accumulate data for just the associated channel
1516          *   (even if scanning). */
1517         if ((chan_num != (le32_to_cpu(stat_resp->flag) >> 16)) ||
1518             ((STATISTICS_REPLY_FLG_BAND_24G_MSK ==
1519              (stat_resp->flag & STATISTICS_REPLY_FLG_BAND_24G_MSK)) && band)) {
1520                 IWL_DEBUG_CALIB("Stats not from chan=%d, band=%d\n",
1521                                 chan_num, band);
1522                 spin_unlock_irqrestore(&priv->lock, flags);
1523                 return;
1524         }
1525
1526         /* Accumulate beacon statistics values across 20 beacons */
1527         chain_noise_a = le32_to_cpu(rx_info->beacon_silence_rssi_a) &
1528                                 IN_BAND_FILTER;
1529         chain_noise_b = le32_to_cpu(rx_info->beacon_silence_rssi_b) &
1530                                 IN_BAND_FILTER;
1531         chain_noise_c = le32_to_cpu(rx_info->beacon_silence_rssi_c) &
1532                                 IN_BAND_FILTER;
1533
1534         chain_sig_a = le32_to_cpu(rx_info->beacon_rssi_a) & IN_BAND_FILTER;
1535         chain_sig_b = le32_to_cpu(rx_info->beacon_rssi_b) & IN_BAND_FILTER;
1536         chain_sig_c = le32_to_cpu(rx_info->beacon_rssi_c) & IN_BAND_FILTER;
1537
1538         spin_unlock_irqrestore(&priv->lock, flags);
1539
1540         data->beacon_count++;
1541
1542         data->chain_noise_a = (chain_noise_a + data->chain_noise_a);
1543         data->chain_noise_b = (chain_noise_b + data->chain_noise_b);
1544         data->chain_noise_c = (chain_noise_c + data->chain_noise_c);
1545
1546         data->chain_signal_a = (chain_sig_a + data->chain_signal_a);
1547         data->chain_signal_b = (chain_sig_b + data->chain_signal_b);
1548         data->chain_signal_c = (chain_sig_c + data->chain_signal_c);
1549
1550         IWL_DEBUG_CALIB("chan=%d, band=%d, beacon=%d\n", chan_num, band,
1551                         data->beacon_count);
1552         IWL_DEBUG_CALIB("chain_sig: a %d b %d c %d\n",
1553                         chain_sig_a, chain_sig_b, chain_sig_c);
1554         IWL_DEBUG_CALIB("chain_noise: a %d b %d c %d\n",
1555                         chain_noise_a, chain_noise_b, chain_noise_c);
1556
1557         /* If this is the 20th beacon, determine:
1558          * 1)  Disconnected antennas (using signal strengths)
1559          * 2)  Differential gain (using silence noise) to balance receivers */
1560         if (data->beacon_count == CAL_NUM_OF_BEACONS) {
1561
1562                 /* Analyze signal for disconnected antenna */
1563                 average_sig[0] = (data->chain_signal_a) / CAL_NUM_OF_BEACONS;
1564                 average_sig[1] = (data->chain_signal_b) / CAL_NUM_OF_BEACONS;
1565                 average_sig[2] = (data->chain_signal_c) / CAL_NUM_OF_BEACONS;
1566
1567                 if (average_sig[0] >= average_sig[1]) {
1568                         max_average_sig = average_sig[0];
1569                         max_average_sig_antenna_i = 0;
1570                         active_chains = (1 << max_average_sig_antenna_i);
1571                 } else {
1572                         max_average_sig = average_sig[1];
1573                         max_average_sig_antenna_i = 1;
1574                         active_chains = (1 << max_average_sig_antenna_i);
1575                 }
1576
1577                 if (average_sig[2] >= max_average_sig) {
1578                         max_average_sig = average_sig[2];
1579                         max_average_sig_antenna_i = 2;
1580                         active_chains = (1 << max_average_sig_antenna_i);
1581                 }
1582
1583                 IWL_DEBUG_CALIB("average_sig: a %d b %d c %d\n",
1584                              average_sig[0], average_sig[1], average_sig[2]);
1585                 IWL_DEBUG_CALIB("max_average_sig = %d, antenna %d\n",
1586                              max_average_sig, max_average_sig_antenna_i);
1587
1588                 /* Compare signal strengths for all 3 receivers. */
1589                 for (i = 0; i < NUM_RX_CHAINS; i++) {
1590                         if (i != max_average_sig_antenna_i) {
1591                                 s32 rssi_delta = (max_average_sig -
1592                                                   average_sig[i]);
1593
1594                                 /* If signal is very weak, compared with
1595                                  * strongest, mark it as disconnected. */
1596                                 if (rssi_delta > MAXIMUM_ALLOWED_PATHLOSS)
1597                                         data->disconn_array[i] = 1;
1598                                 else
1599                                         active_chains |= (1 << i);
1600                         IWL_DEBUG_CALIB("i = %d  rssiDelta = %d  "
1601                                      "disconn_array[i] = %d\n",
1602                                      i, rssi_delta, data->disconn_array[i]);
1603                         }
1604                 }
1605
1606                 /*If both chains A & B are disconnected -
1607                  * connect B and leave A as is */
1608                 if (data->disconn_array[CHAIN_A] &&
1609                     data->disconn_array[CHAIN_B]) {
1610                         data->disconn_array[CHAIN_B] = 0;
1611                         active_chains |= (1 << CHAIN_B);
1612                         IWL_DEBUG_CALIB("both A & B chains are disconnected! "
1613                                      "W/A - declare B as connected\n");
1614                 }
1615
1616                 IWL_DEBUG_CALIB("active_chains (bitwise) = 0x%x\n",
1617                                 active_chains);
1618
1619                 /* Save for use within RXON, TX, SCAN commands, etc. */
1620                 priv->valid_antenna = active_chains;
1621
1622                 /* Analyze noise for rx balance */
1623                 average_noise[0] = ((data->chain_noise_a)/CAL_NUM_OF_BEACONS);
1624                 average_noise[1] = ((data->chain_noise_b)/CAL_NUM_OF_BEACONS);
1625                 average_noise[2] = ((data->chain_noise_c)/CAL_NUM_OF_BEACONS);
1626
1627                 for (i = 0; i < NUM_RX_CHAINS; i++) {
1628                         if (!(data->disconn_array[i]) &&
1629                            (average_noise[i] <= min_average_noise)) {
1630                                 /* This means that chain i is active and has
1631                                  * lower noise values so far: */
1632                                 min_average_noise = average_noise[i];
1633                                 min_average_noise_antenna_i = i;
1634                         }
1635                 }
1636
1637                 data->delta_gain_code[min_average_noise_antenna_i] = 0;
1638
1639                 IWL_DEBUG_CALIB("average_noise: a %d b %d c %d\n",
1640                                 average_noise[0], average_noise[1],
1641                                 average_noise[2]);
1642
1643                 IWL_DEBUG_CALIB("min_average_noise = %d, antenna %d\n",
1644                                 min_average_noise, min_average_noise_antenna_i);
1645
1646                 for (i = 0; i < NUM_RX_CHAINS; i++) {
1647                         s32 delta_g = 0;
1648
1649                         if (!(data->disconn_array[i]) &&
1650                             (data->delta_gain_code[i] ==
1651                              CHAIN_NOISE_DELTA_GAIN_INIT_VAL)) {
1652                                 delta_g = average_noise[i] - min_average_noise;
1653                                 data->delta_gain_code[i] = (u8)((delta_g *
1654                                                                     10) / 15);
1655                                 if (CHAIN_NOISE_MAX_DELTA_GAIN_CODE <
1656                                    data->delta_gain_code[i])
1657                                         data->delta_gain_code[i] =
1658                                           CHAIN_NOISE_MAX_DELTA_GAIN_CODE;
1659
1660                                 data->delta_gain_code[i] =
1661                                         (data->delta_gain_code[i] | (1 << 2));
1662                         } else
1663                                 data->delta_gain_code[i] = 0;
1664                 }
1665                 IWL_DEBUG_CALIB("delta_gain_codes: a %d b %d c %d\n",
1666                              data->delta_gain_code[0],
1667                              data->delta_gain_code[1],
1668                              data->delta_gain_code[2]);
1669
1670                 /* Differential gain gets sent to uCode only once */
1671                 if (!data->radio_write) {
1672                         struct iwl4965_calibration_cmd cmd;
1673                         data->radio_write = 1;
1674
1675                         memset(&cmd, 0, sizeof(cmd));
1676                         cmd.opCode = PHY_CALIBRATE_DIFF_GAIN_CMD;
1677                         cmd.diff_gain_a = data->delta_gain_code[0];
1678                         cmd.diff_gain_b = data->delta_gain_code[1];
1679                         cmd.diff_gain_c = data->delta_gain_code[2];
1680                         ret = iwl_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
1681                                               sizeof(cmd), &cmd);
1682                         if (ret)
1683                                 IWL_DEBUG_CALIB("fail sending cmd "
1684                                              "REPLY_PHY_CALIBRATION_CMD \n");
1685
1686                         /* TODO we might want recalculate
1687                          * rx_chain in rxon cmd */
1688
1689                         /* Mark so we run this algo only once! */
1690                         data->state = IWL_CHAIN_NOISE_CALIBRATED;
1691                 }
1692                 data->chain_noise_a = 0;
1693                 data->chain_noise_b = 0;
1694                 data->chain_noise_c = 0;
1695                 data->chain_signal_a = 0;
1696                 data->chain_signal_b = 0;
1697                 data->chain_signal_c = 0;
1698                 data->beacon_count = 0;
1699         }
1700         return;
1701 }
1702
1703 static void iwl4965_sensitivity_calibration(struct iwl_priv *priv,
1704                                             struct iwl4965_notif_statistics *resp)
1705 {
1706         u32 rx_enable_time;
1707         u32 fa_cck;
1708         u32 fa_ofdm;
1709         u32 bad_plcp_cck;
1710         u32 bad_plcp_ofdm;
1711         u32 norm_fa_ofdm;
1712         u32 norm_fa_cck;
1713         struct iwl4965_sensitivity_data *data = NULL;
1714         struct statistics_rx_non_phy *rx_info = &(resp->rx.general);
1715         struct statistics_rx *statistics = &(resp->rx);
1716         unsigned long flags;
1717         struct statistics_general_data statis;
1718         int ret;
1719
1720         data = &(priv->sensitivity_data);
1721
1722         if (!iwl_is_associated(priv)) {
1723                 IWL_DEBUG_CALIB("<< - not associated\n");
1724                 return;
1725         }
1726
1727         spin_lock_irqsave(&priv->lock, flags);
1728         if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) {
1729                 IWL_DEBUG_CALIB("<< invalid data.\n");
1730                 spin_unlock_irqrestore(&priv->lock, flags);
1731                 return;
1732         }
1733
1734         /* Extract Statistics: */
1735         rx_enable_time = le32_to_cpu(rx_info->channel_load);
1736         fa_cck = le32_to_cpu(statistics->cck.false_alarm_cnt);
1737         fa_ofdm = le32_to_cpu(statistics->ofdm.false_alarm_cnt);
1738         bad_plcp_cck = le32_to_cpu(statistics->cck.plcp_err);
1739         bad_plcp_ofdm = le32_to_cpu(statistics->ofdm.plcp_err);
1740
1741         statis.beacon_silence_rssi_a =
1742                         le32_to_cpu(statistics->general.beacon_silence_rssi_a);
1743         statis.beacon_silence_rssi_b =
1744                         le32_to_cpu(statistics->general.beacon_silence_rssi_b);
1745         statis.beacon_silence_rssi_c =
1746                         le32_to_cpu(statistics->general.beacon_silence_rssi_c);
1747         statis.beacon_energy_a =
1748                         le32_to_cpu(statistics->general.beacon_energy_a);
1749         statis.beacon_energy_b =
1750                         le32_to_cpu(statistics->general.beacon_energy_b);
1751         statis.beacon_energy_c =
1752                         le32_to_cpu(statistics->general.beacon_energy_c);
1753
1754         spin_unlock_irqrestore(&priv->lock, flags);
1755
1756         IWL_DEBUG_CALIB("rx_enable_time = %u usecs\n", rx_enable_time);
1757
1758         if (!rx_enable_time) {
1759                 IWL_DEBUG_CALIB("<< RX Enable Time == 0! \n");
1760                 return;
1761         }
1762
1763         /* These statistics increase monotonically, and do not reset
1764          *   at each beacon.  Calculate difference from last value, or just
1765          *   use the new statistics value if it has reset or wrapped around. */
1766         if (data->last_bad_plcp_cnt_cck > bad_plcp_cck)
1767                 data->last_bad_plcp_cnt_cck = bad_plcp_cck;
1768         else {
1769                 bad_plcp_cck -= data->last_bad_plcp_cnt_cck;
1770                 data->last_bad_plcp_cnt_cck += bad_plcp_cck;
1771         }
1772
1773         if (data->last_bad_plcp_cnt_ofdm > bad_plcp_ofdm)
1774                 data->last_bad_plcp_cnt_ofdm = bad_plcp_ofdm;
1775         else {
1776                 bad_plcp_ofdm -= data->last_bad_plcp_cnt_ofdm;
1777                 data->last_bad_plcp_cnt_ofdm += bad_plcp_ofdm;
1778         }
1779
1780         if (data->last_fa_cnt_ofdm > fa_ofdm)
1781                 data->last_fa_cnt_ofdm = fa_ofdm;
1782         else {
1783                 fa_ofdm -= data->last_fa_cnt_ofdm;
1784                 data->last_fa_cnt_ofdm += fa_ofdm;
1785         }
1786
1787         if (data->last_fa_cnt_cck > fa_cck)
1788                 data->last_fa_cnt_cck = fa_cck;
1789         else {
1790                 fa_cck -= data->last_fa_cnt_cck;
1791                 data->last_fa_cnt_cck += fa_cck;
1792         }
1793
1794         /* Total aborted signal locks */
1795         norm_fa_ofdm = fa_ofdm + bad_plcp_ofdm;
1796         norm_fa_cck = fa_cck + bad_plcp_cck;
1797
1798         IWL_DEBUG_CALIB("cck: fa %u badp %u  ofdm: fa %u badp %u\n", fa_cck,
1799                         bad_plcp_cck, fa_ofdm, bad_plcp_ofdm);
1800
1801         iwl4965_sens_auto_corr_ofdm(priv, norm_fa_ofdm, rx_enable_time);
1802         iwl4965_sens_energy_cck(priv, norm_fa_cck, rx_enable_time, &statis);
1803         ret = iwl4965_sensitivity_write(priv, CMD_ASYNC);
1804
1805         return;
1806 }
1807
1808 static void iwl4965_bg_sensitivity_work(struct work_struct *work)
1809 {
1810         struct iwl_priv *priv = container_of(work, struct iwl_priv,
1811                         sensitivity_work);
1812
1813         mutex_lock(&priv->mutex);
1814
1815         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
1816             test_bit(STATUS_SCANNING, &priv->status)) {
1817                 mutex_unlock(&priv->mutex);
1818                 return;
1819         }
1820
1821         if (priv->start_calib) {
1822                 iwl4965_noise_calibration(priv, &priv->statistics);
1823
1824                 if (priv->sensitivity_data.state ==
1825                                         IWL_SENS_CALIB_NEED_REINIT) {
1826                         iwl4965_init_sensitivity(priv, CMD_ASYNC, 0);
1827                         priv->sensitivity_data.state = IWL_SENS_CALIB_ALLOWED;
1828                 } else
1829                         iwl4965_sensitivity_calibration(priv,
1830                                         &priv->statistics);
1831         }
1832
1833         mutex_unlock(&priv->mutex);
1834         return;
1835 }
1836 #endif /*CONFIG_IWL4965_SENSITIVITY*/
1837
1838 static void iwl4965_bg_txpower_work(struct work_struct *work)
1839 {
1840         struct iwl_priv *priv = container_of(work, struct iwl_priv,
1841                         txpower_work);
1842
1843         /* If a scan happened to start before we got here
1844          * then just return; the statistics notification will
1845          * kick off another scheduled work to compensate for
1846          * any temperature delta we missed here. */
1847         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
1848             test_bit(STATUS_SCANNING, &priv->status))
1849                 return;
1850
1851         mutex_lock(&priv->mutex);
1852
1853         /* Regardless of if we are assocaited, we must reconfigure the
1854          * TX power since frames can be sent on non-radar channels while
1855          * not associated */
1856         iwl4965_hw_reg_send_txpower(priv);
1857
1858         /* Update last_temperature to keep is_calib_needed from running
1859          * when it isn't needed... */
1860         priv->last_temperature = priv->temperature;
1861
1862         mutex_unlock(&priv->mutex);
1863 }
1864
1865 /*
1866  * Acquire priv->lock before calling this function !
1867  */
1868 static void iwl4965_set_wr_ptrs(struct iwl_priv *priv, int txq_id, u32 index)
1869 {
1870         iwl_write_direct32(priv, HBUS_TARG_WRPTR,
1871                              (index & 0xff) | (txq_id << 8));
1872         iwl_write_prph(priv, IWL49_SCD_QUEUE_RDPTR(txq_id), index);
1873 }
1874
1875 /**
1876  * iwl4965_tx_queue_set_status - (optionally) start Tx/Cmd queue
1877  * @tx_fifo_id: Tx DMA/FIFO channel (range 0-7) that the queue will feed
1878  * @scd_retry: (1) Indicates queue will be used in aggregation mode
1879  *
1880  * NOTE:  Acquire priv->lock before calling this function !
1881  */
1882 static void iwl4965_tx_queue_set_status(struct iwl_priv *priv,
1883                                         struct iwl4965_tx_queue *txq,
1884                                         int tx_fifo_id, int scd_retry)
1885 {
1886         int txq_id = txq->q.id;
1887
1888         /* Find out whether to activate Tx queue */
1889         int active = test_bit(txq_id, &priv->txq_ctx_active_msk)?1:0;
1890
1891         /* Set up and activate */
1892         iwl_write_prph(priv, IWL49_SCD_QUEUE_STATUS_BITS(txq_id),
1893                                  (active << SCD_QUEUE_STTS_REG_POS_ACTIVE) |
1894                                  (tx_fifo_id << SCD_QUEUE_STTS_REG_POS_TXF) |
1895                                  (scd_retry << SCD_QUEUE_STTS_REG_POS_WSL) |
1896                                  (scd_retry << SCD_QUEUE_STTS_REG_POS_SCD_ACK) |
1897                                  SCD_QUEUE_STTS_REG_MSK);
1898
1899         txq->sched_retry = scd_retry;
1900
1901         IWL_DEBUG_INFO("%s %s Queue %d on AC %d\n",
1902                        active ? "Activate" : "Deactivate",
1903                        scd_retry ? "BA" : "AC", txq_id, tx_fifo_id);
1904 }
1905
1906 static const u16 default_queue_to_tx_fifo[] = {
1907         IWL_TX_FIFO_AC3,
1908         IWL_TX_FIFO_AC2,
1909         IWL_TX_FIFO_AC1,
1910         IWL_TX_FIFO_AC0,
1911         IWL_CMD_FIFO_NUM,
1912         IWL_TX_FIFO_HCCA_1,
1913         IWL_TX_FIFO_HCCA_2
1914 };
1915
1916 static inline void iwl4965_txq_ctx_activate(struct iwl_priv *priv, int txq_id)
1917 {
1918         set_bit(txq_id, &priv->txq_ctx_active_msk);
1919 }
1920
1921 static inline void iwl4965_txq_ctx_deactivate(struct iwl_priv *priv, int txq_id)
1922 {
1923         clear_bit(txq_id, &priv->txq_ctx_active_msk);
1924 }
1925
1926 int iwl4965_alive_notify(struct iwl_priv *priv)
1927 {
1928         u32 a;
1929         int i = 0;
1930         unsigned long flags;
1931         int ret;
1932
1933         spin_lock_irqsave(&priv->lock, flags);
1934
1935 #ifdef CONFIG_IWL4965_SENSITIVITY
1936         memset(&(priv->sensitivity_data), 0,
1937                sizeof(struct iwl4965_sensitivity_data));
1938         memset(&(priv->chain_noise_data), 0,
1939                sizeof(struct iwl4965_chain_noise_data));
1940         for (i = 0; i < NUM_RX_CHAINS; i++)
1941                 priv->chain_noise_data.delta_gain_code[i] =
1942                                 CHAIN_NOISE_DELTA_GAIN_INIT_VAL;
1943 #endif /* CONFIG_IWL4965_SENSITIVITY*/
1944         ret = iwl_grab_nic_access(priv);
1945         if (ret) {
1946                 spin_unlock_irqrestore(&priv->lock, flags);
1947                 return ret;
1948         }
1949
1950         /* Clear 4965's internal Tx Scheduler data base */
1951         priv->scd_base_addr = iwl_read_prph(priv, IWL49_SCD_SRAM_BASE_ADDR);
1952         a = priv->scd_base_addr + SCD_CONTEXT_DATA_OFFSET;
1953         for (; a < priv->scd_base_addr + SCD_TX_STTS_BITMAP_OFFSET; a += 4)
1954                 iwl_write_targ_mem(priv, a, 0);
1955         for (; a < priv->scd_base_addr + SCD_TRANSLATE_TBL_OFFSET; a += 4)
1956                 iwl_write_targ_mem(priv, a, 0);
1957         for (; a < sizeof(u16) * priv->hw_params.max_txq_num; a += 4)
1958                 iwl_write_targ_mem(priv, a, 0);
1959
1960         /* Tel 4965 where to find Tx byte count tables */
1961         iwl_write_prph(priv, IWL49_SCD_DRAM_BASE_ADDR,
1962                 (priv->shared_phys +
1963                  offsetof(struct iwl4965_shared, queues_byte_cnt_tbls)) >> 10);
1964
1965         /* Disable chain mode for all queues */
1966         iwl_write_prph(priv, IWL49_SCD_QUEUECHAIN_SEL, 0);
1967
1968         /* Initialize each Tx queue (including the command queue) */
1969         for (i = 0; i < priv->hw_params.max_txq_num; i++) {
1970
1971                 /* TFD circular buffer read/write indexes */
1972                 iwl_write_prph(priv, IWL49_SCD_QUEUE_RDPTR(i), 0);
1973                 iwl_write_direct32(priv, HBUS_TARG_WRPTR, 0 | (i << 8));
1974
1975                 /* Max Tx Window size for Scheduler-ACK mode */
1976                 iwl_write_targ_mem(priv, priv->scd_base_addr +
1977                                         SCD_CONTEXT_QUEUE_OFFSET(i),
1978                                         (SCD_WIN_SIZE <<
1979                                         SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
1980                                         SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
1981
1982                 /* Frame limit */
1983                 iwl_write_targ_mem(priv, priv->scd_base_addr +
1984                                         SCD_CONTEXT_QUEUE_OFFSET(i) +
1985                                         sizeof(u32),
1986                                         (SCD_FRAME_LIMIT <<
1987                                         SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) &
1988                                         SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
1989
1990         }
1991         iwl_write_prph(priv, IWL49_SCD_INTERRUPT_MASK,
1992                                  (1 << priv->hw_params.max_txq_num) - 1);
1993
1994         /* Activate all Tx DMA/FIFO channels */
1995         iwl_write_prph(priv, IWL49_SCD_TXFACT,
1996                                  SCD_TXFACT_REG_TXFIFO_MASK(0, 7));
1997
1998         iwl4965_set_wr_ptrs(priv, IWL_CMD_QUEUE_NUM, 0);
1999
2000         /* Map each Tx/cmd queue to its corresponding fifo */
2001         for (i = 0; i < ARRAY_SIZE(default_queue_to_tx_fifo); i++) {
2002                 int ac = default_queue_to_tx_fifo[i];
2003                 iwl4965_txq_ctx_activate(priv, i);
2004                 iwl4965_tx_queue_set_status(priv, &priv->txq[i], ac, 0);
2005         }
2006
2007         iwl_release_nic_access(priv);
2008         spin_unlock_irqrestore(&priv->lock, flags);
2009
2010         /* Ask for statistics now, the uCode will send statistics notification
2011          * periodically after association */
2012         iwl_send_statistics_request(priv, CMD_ASYNC);
2013         return ret;
2014 }
2015
2016 /**
2017  * iwl4965_hw_set_hw_params
2018  *
2019  * Called when initializing driver
2020  */
2021 int iwl4965_hw_set_hw_params(struct iwl_priv *priv)
2022 {
2023
2024         if ((priv->cfg->mod_params->num_of_queues > IWL4965_MAX_NUM_QUEUES) ||
2025             (priv->cfg->mod_params->num_of_queues < IWL_MIN_NUM_QUEUES)) {
2026                 IWL_ERROR("invalid queues_num, should be between %d and %d\n",
2027                           IWL_MIN_NUM_QUEUES, IWL4965_MAX_NUM_QUEUES);
2028                 return -EINVAL;
2029         }
2030
2031         priv->hw_params.max_txq_num = priv->cfg->mod_params->num_of_queues;
2032         priv->hw_params.tx_cmd_len = sizeof(struct iwl4965_tx_cmd);
2033         priv->hw_params.max_rxq_size = RX_QUEUE_SIZE;
2034         priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
2035         if (priv->cfg->mod_params->amsdu_size_8K)
2036                 priv->hw_params.rx_buf_size = IWL_RX_BUF_SIZE_8K;
2037         else
2038                 priv->hw_params.rx_buf_size = IWL_RX_BUF_SIZE_4K;
2039         priv->hw_params.max_pkt_size = priv->hw_params.rx_buf_size - 256;
2040         priv->hw_params.max_stations = IWL4965_STATION_COUNT;
2041         priv->hw_params.bcast_sta_id = IWL4965_BROADCAST_ID;
2042
2043         priv->hw_params.tx_chains_num = 2;
2044         priv->hw_params.rx_chains_num = 2;
2045         priv->hw_params.valid_tx_ant = (IWL_ANTENNA_MAIN | IWL_ANTENNA_AUX);
2046         priv->hw_params.valid_rx_ant = (IWL_ANTENNA_MAIN | IWL_ANTENNA_AUX);
2047
2048         return 0;
2049 }
2050
2051 /**
2052  * iwl4965_hw_txq_ctx_free - Free TXQ Context
2053  *
2054  * Destroy all TX DMA queues and structures
2055  */
2056 void iwl4965_hw_txq_ctx_free(struct iwl_priv *priv)
2057 {
2058         int txq_id;
2059
2060         /* Tx queues */
2061         for (txq_id = 0; txq_id < priv->hw_params.max_txq_num; txq_id++)
2062                 iwl4965_tx_queue_free(priv, &priv->txq[txq_id]);
2063
2064         /* Keep-warm buffer */
2065         iwl4965_kw_free(priv);
2066 }
2067
2068 /**
2069  * iwl4965_hw_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr]
2070  *
2071  * Does NOT advance any TFD circular buffer read/write indexes
2072  * Does NOT free the TFD itself (which is within circular buffer)
2073  */
2074 int iwl4965_hw_txq_free_tfd(struct iwl_priv *priv, struct iwl4965_tx_queue *txq)
2075 {
2076         struct iwl4965_tfd_frame *bd_tmp = (struct iwl4965_tfd_frame *)&txq->bd[0];
2077         struct iwl4965_tfd_frame *bd = &bd_tmp[txq->q.read_ptr];
2078         struct pci_dev *dev = priv->pci_dev;
2079         int i;
2080         int counter = 0;
2081         int index, is_odd;
2082
2083         /* Host command buffers stay mapped in memory, nothing to clean */
2084         if (txq->q.id == IWL_CMD_QUEUE_NUM)
2085                 return 0;
2086
2087         /* Sanity check on number of chunks */
2088         counter = IWL_GET_BITS(*bd, num_tbs);
2089         if (counter > MAX_NUM_OF_TBS) {
2090                 IWL_ERROR("Too many chunks: %i\n", counter);
2091                 /* @todo issue fatal error, it is quite serious situation */
2092                 return 0;
2093         }
2094
2095         /* Unmap chunks, if any.
2096          * TFD info for odd chunks is different format than for even chunks. */
2097         for (i = 0; i < counter; i++) {
2098                 index = i / 2;
2099                 is_odd = i & 0x1;
2100
2101                 if (is_odd)
2102                         pci_unmap_single(
2103                                 dev,
2104                                 IWL_GET_BITS(bd->pa[index], tb2_addr_lo16) |
2105                                 (IWL_GET_BITS(bd->pa[index],
2106                                               tb2_addr_hi20) << 16),
2107                                 IWL_GET_BITS(bd->pa[index], tb2_len),
2108                                 PCI_DMA_TODEVICE);
2109
2110                 else if (i > 0)
2111                         pci_unmap_single(dev,
2112                                          le32_to_cpu(bd->pa[index].tb1_addr),
2113                                          IWL_GET_BITS(bd->pa[index], tb1_len),
2114                                          PCI_DMA_TODEVICE);
2115
2116                 /* Free SKB, if any, for this chunk */
2117                 if (txq->txb[txq->q.read_ptr].skb[i]) {
2118                         struct sk_buff *skb = txq->txb[txq->q.read_ptr].skb[i];
2119
2120                         dev_kfree_skb(skb);
2121                         txq->txb[txq->q.read_ptr].skb[i] = NULL;
2122                 }
2123         }
2124         return 0;
2125 }
2126
2127 int iwl4965_hw_reg_set_txpower(struct iwl_priv *priv, s8 power)
2128 {
2129         IWL_ERROR("TODO: Implement iwl4965_hw_reg_set_txpower!\n");
2130         return -EINVAL;
2131 }
2132
2133 static s32 iwl4965_math_div_round(s32 num, s32 denom, s32 *res)
2134 {
2135         s32 sign = 1;
2136
2137         if (num < 0) {
2138                 sign = -sign;
2139                 num = -num;
2140         }
2141         if (denom < 0) {
2142                 sign = -sign;
2143                 denom = -denom;
2144         }
2145         *res = 1;
2146         *res = ((num * 2 + denom) / (denom * 2)) * sign;
2147
2148         return 1;
2149 }
2150
2151 /**
2152  * iwl4965_get_voltage_compensation - Power supply voltage comp for txpower
2153  *
2154  * Determines power supply voltage compensation for txpower calculations.
2155  * Returns number of 1/2-dB steps to subtract from gain table index,
2156  * to compensate for difference between power supply voltage during
2157  * factory measurements, vs. current power supply voltage.
2158  *
2159  * Voltage indication is higher for lower voltage.
2160  * Lower voltage requires more gain (lower gain table index).
2161  */
2162 static s32 iwl4965_get_voltage_compensation(s32 eeprom_voltage,
2163                                             s32 current_voltage)
2164 {
2165         s32 comp = 0;
2166
2167         if ((TX_POWER_IWL_ILLEGAL_VOLTAGE == eeprom_voltage) ||
2168             (TX_POWER_IWL_ILLEGAL_VOLTAGE == current_voltage))
2169                 return 0;
2170
2171         iwl4965_math_div_round(current_voltage - eeprom_voltage,
2172                                TX_POWER_IWL_VOLTAGE_CODES_PER_03V, &comp);
2173
2174         if (current_voltage > eeprom_voltage)
2175                 comp *= 2;
2176         if ((comp < -2) || (comp > 2))
2177                 comp = 0;
2178
2179         return comp;
2180 }
2181
2182 static const struct iwl_channel_info *
2183 iwl4965_get_channel_txpower_info(struct iwl_priv *priv,
2184                                  enum ieee80211_band band, u16 channel)
2185 {
2186         const struct iwl_channel_info *ch_info;
2187
2188         ch_info = iwl_get_channel_info(priv, band, channel);
2189
2190         if (!is_channel_valid(ch_info))
2191                 return NULL;
2192
2193         return ch_info;
2194 }
2195
2196 static s32 iwl4965_get_tx_atten_grp(u16 channel)
2197 {
2198         if (channel >= CALIB_IWL_TX_ATTEN_GR5_FCH &&
2199             channel <= CALIB_IWL_TX_ATTEN_GR5_LCH)
2200                 return CALIB_CH_GROUP_5;
2201
2202         if (channel >= CALIB_IWL_TX_ATTEN_GR1_FCH &&
2203             channel <= CALIB_IWL_TX_ATTEN_GR1_LCH)
2204                 return CALIB_CH_GROUP_1;
2205
2206         if (channel >= CALIB_IWL_TX_ATTEN_GR2_FCH &&
2207             channel <= CALIB_IWL_TX_ATTEN_GR2_LCH)
2208                 return CALIB_CH_GROUP_2;
2209
2210         if (channel >= CALIB_IWL_TX_ATTEN_GR3_FCH &&
2211             channel <= CALIB_IWL_TX_ATTEN_GR3_LCH)
2212                 return CALIB_CH_GROUP_3;
2213
2214         if (channel >= CALIB_IWL_TX_ATTEN_GR4_FCH &&
2215             channel <= CALIB_IWL_TX_ATTEN_GR4_LCH)
2216                 return CALIB_CH_GROUP_4;
2217
2218         IWL_ERROR("Can't find txatten group for channel %d.\n", channel);
2219         return -1;
2220 }
2221
2222 static u32 iwl4965_get_sub_band(const struct iwl_priv *priv, u32 channel)
2223 {
2224         s32 b = -1;
2225
2226         for (b = 0; b < EEPROM_TX_POWER_BANDS; b++) {
2227                 if (priv->eeprom.calib_info.band_info[b].ch_from == 0)
2228                         continue;
2229
2230                 if ((channel >= priv->eeprom.calib_info.band_info[b].ch_from)
2231                     && (channel <= priv->eeprom.calib_info.band_info[b].ch_to))
2232                         break;
2233         }
2234
2235         return b;
2236 }
2237
2238 static s32 iwl4965_interpolate_value(s32 x, s32 x1, s32 y1, s32 x2, s32 y2)
2239 {
2240         s32 val;
2241
2242         if (x2 == x1)
2243                 return y1;
2244         else {
2245                 iwl4965_math_div_round((x2 - x) * (y1 - y2), (x2 - x1), &val);
2246                 return val + y2;
2247         }
2248 }
2249
2250 /**
2251  * iwl4965_interpolate_chan - Interpolate factory measurements for one channel
2252  *
2253  * Interpolates factory measurements from the two sample channels within a
2254  * sub-band, to apply to channel of interest.  Interpolation is proportional to
2255  * differences in channel frequencies, which is proportional to differences
2256  * in channel number.
2257  */
2258 static int iwl4965_interpolate_chan(struct iwl_priv *priv, u32 channel,
2259                                     struct iwl4965_eeprom_calib_ch_info *chan_info)
2260 {
2261         s32 s = -1;
2262         u32 c;
2263         u32 m;
2264         const struct iwl4965_eeprom_calib_measure *m1;
2265         const struct iwl4965_eeprom_calib_measure *m2;
2266         struct iwl4965_eeprom_calib_measure *omeas;
2267         u32 ch_i1;
2268         u32 ch_i2;
2269
2270         s = iwl4965_get_sub_band(priv, channel);
2271         if (s >= EEPROM_TX_POWER_BANDS) {
2272                 IWL_ERROR("Tx Power can not find channel %d ", channel);
2273                 return -1;
2274         }
2275
2276         ch_i1 = priv->eeprom.calib_info.band_info[s].ch1.ch_num;
2277         ch_i2 = priv->eeprom.calib_info.band_info[s].ch2.ch_num;
2278         chan_info->ch_num = (u8) channel;
2279
2280         IWL_DEBUG_TXPOWER("channel %d subband %d factory cal ch %d & %d\n",
2281                           channel, s, ch_i1, ch_i2);
2282
2283         for (c = 0; c < EEPROM_TX_POWER_TX_CHAINS; c++) {
2284                 for (m = 0; m < EEPROM_TX_POWER_MEASUREMENTS; m++) {
2285                         m1 = &(priv->eeprom.calib_info.band_info[s].ch1.
2286                                measurements[c][m]);
2287                         m2 = &(priv->eeprom.calib_info.band_info[s].ch2.
2288                                measurements[c][m]);
2289                         omeas = &(chan_info->measurements[c][m]);
2290
2291                         omeas->actual_pow =
2292                             (u8) iwl4965_interpolate_value(channel, ch_i1,
2293                                                            m1->actual_pow,
2294                                                            ch_i2,
2295                                                            m2->actual_pow);
2296                         omeas->gain_idx =
2297                             (u8) iwl4965_interpolate_value(channel, ch_i1,
2298                                                            m1->gain_idx, ch_i2,
2299                                                            m2->gain_idx);
2300                         omeas->temperature =
2301                             (u8) iwl4965_interpolate_value(channel, ch_i1,
2302                                                            m1->temperature,
2303                                                            ch_i2,
2304                                                            m2->temperature);
2305                         omeas->pa_det =
2306                             (s8) iwl4965_interpolate_value(channel, ch_i1,
2307                                                            m1->pa_det, ch_i2,
2308                                                            m2->pa_det);
2309
2310                         IWL_DEBUG_TXPOWER
2311                             ("chain %d meas %d AP1=%d AP2=%d AP=%d\n", c, m,
2312                              m1->actual_pow, m2->actual_pow, omeas->actual_pow);
2313                         IWL_DEBUG_TXPOWER
2314                             ("chain %d meas %d NI1=%d NI2=%d NI=%d\n", c, m,
2315                              m1->gain_idx, m2->gain_idx, omeas->gain_idx);
2316                         IWL_DEBUG_TXPOWER
2317                             ("chain %d meas %d PA1=%d PA2=%d PA=%d\n", c, m,
2318                              m1->pa_det, m2->pa_det, omeas->pa_det);
2319                         IWL_DEBUG_TXPOWER
2320                             ("chain %d meas %d  T1=%d  T2=%d  T=%d\n", c, m,
2321                              m1->temperature, m2->temperature,
2322                              omeas->temperature);
2323                 }
2324         }
2325
2326         return 0;
2327 }
2328
2329 /* bit-rate-dependent table to prevent Tx distortion, in half-dB units,
2330  * for OFDM 6, 12, 18, 24, 36, 48, 54, 60 MBit, and CCK all rates. */
2331 static s32 back_off_table[] = {
2332         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 20 MHz */
2333         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 20 MHz */
2334         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 40 MHz */
2335         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 40 MHz */
2336         10                      /* CCK */
2337 };
2338
2339 /* Thermal compensation values for txpower for various frequency ranges ...
2340  *   ratios from 3:1 to 4.5:1 of degrees (Celsius) per half-dB gain adjust */
2341 static struct iwl4965_txpower_comp_entry {
2342         s32 degrees_per_05db_a;
2343         s32 degrees_per_05db_a_denom;
2344 } tx_power_cmp_tble[CALIB_CH_GROUP_MAX] = {
2345         {9, 2},                 /* group 0 5.2, ch  34-43 */
2346         {4, 1},                 /* group 1 5.2, ch  44-70 */
2347         {4, 1},                 /* group 2 5.2, ch  71-124 */
2348         {4, 1},                 /* group 3 5.2, ch 125-200 */
2349         {3, 1}                  /* group 4 2.4, ch   all */
2350 };
2351
2352 static s32 get_min_power_index(s32 rate_power_index, u32 band)
2353 {
2354         if (!band) {
2355                 if ((rate_power_index & 7) <= 4)
2356                         return MIN_TX_GAIN_INDEX_52GHZ_EXT;
2357         }
2358         return MIN_TX_GAIN_INDEX;
2359 }
2360
2361 struct gain_entry {
2362         u8 dsp;
2363         u8 radio;
2364 };
2365
2366 static const struct gain_entry gain_table[2][108] = {
2367         /* 5.2GHz power gain index table */
2368         {
2369          {123, 0x3F},           /* highest txpower */
2370          {117, 0x3F},
2371          {110, 0x3F},
2372          {104, 0x3F},
2373          {98, 0x3F},
2374          {110, 0x3E},
2375          {104, 0x3E},
2376          {98, 0x3E},
2377          {110, 0x3D},
2378          {104, 0x3D},
2379          {98, 0x3D},
2380          {110, 0x3C},
2381          {104, 0x3C},
2382          {98, 0x3C},
2383          {110, 0x3B},
2384          {104, 0x3B},
2385          {98, 0x3B},
2386          {110, 0x3A},
2387          {104, 0x3A},
2388          {98, 0x3A},
2389          {110, 0x39},
2390          {104, 0x39},
2391          {98, 0x39},
2392          {110, 0x38},
2393          {104, 0x38},
2394          {98, 0x38},
2395          {110, 0x37},
2396          {104, 0x37},
2397          {98, 0x37},
2398          {110, 0x36},
2399          {104, 0x36},
2400          {98, 0x36},
2401          {110, 0x35},
2402          {104, 0x35},
2403          {98, 0x35},
2404          {110, 0x34},
2405          {104, 0x34},
2406          {98, 0x34},
2407          {110, 0x33},
2408          {104, 0x33},
2409          {98, 0x33},
2410          {110, 0x32},
2411          {104, 0x32},
2412          {98, 0x32},
2413          {110, 0x31},
2414          {104, 0x31},
2415          {98, 0x31},
2416          {110, 0x30},
2417          {104, 0x30},
2418          {98, 0x30},
2419          {110, 0x25},
2420          {104, 0x25},
2421          {98, 0x25},
2422          {110, 0x24},
2423          {104, 0x24},
2424          {98, 0x24},
2425          {110, 0x23},
2426          {104, 0x23},
2427          {98, 0x23},
2428          {110, 0x22},
2429          {104, 0x18},
2430          {98, 0x18},
2431          {110, 0x17},
2432          {104, 0x17},
2433          {98, 0x17},
2434          {110, 0x16},
2435          {104, 0x16},
2436          {98, 0x16},
2437          {110, 0x15},
2438          {104, 0x15},
2439          {98, 0x15},
2440          {110, 0x14},
2441          {104, 0x14},
2442          {98, 0x14},
2443          {110, 0x13},
2444          {104, 0x13},
2445          {98, 0x13},
2446          {110, 0x12},
2447          {104, 0x08},
2448          {98, 0x08},
2449          {110, 0x07},
2450          {104, 0x07},
2451          {98, 0x07},
2452          {110, 0x06},
2453          {104, 0x06},
2454          {98, 0x06},
2455          {110, 0x05},
2456          {104, 0x05},
2457          {98, 0x05},
2458          {110, 0x04},
2459          {104, 0x04},
2460          {98, 0x04},
2461          {110, 0x03},
2462          {104, 0x03},
2463          {98, 0x03},
2464          {110, 0x02},
2465          {104, 0x02},
2466          {98, 0x02},
2467          {110, 0x01},
2468          {104, 0x01},
2469          {98, 0x01},
2470          {110, 0x00},
2471          {104, 0x00},
2472          {98, 0x00},
2473          {93, 0x00},
2474          {88, 0x00},
2475          {83, 0x00},
2476          {78, 0x00},
2477          },
2478         /* 2.4GHz power gain index table */
2479         {
2480          {110, 0x3f},           /* highest txpower */
2481          {104, 0x3f},
2482          {98, 0x3f},
2483          {110, 0x3e},
2484          {104, 0x3e},
2485          {98, 0x3e},
2486          {110, 0x3d},
2487          {104, 0x3d},
2488          {98, 0x3d},
2489          {110, 0x3c},
2490          {104, 0x3c},
2491          {98, 0x3c},
2492          {110, 0x3b},
2493          {104, 0x3b},
2494          {98, 0x3b},
2495          {110, 0x3a},
2496          {104, 0x3a},
2497          {98, 0x3a},
2498          {110, 0x39},
2499          {104, 0x39},
2500          {98, 0x39},
2501          {110, 0x38},
2502          {104, 0x38},
2503          {98, 0x38},
2504          {110, 0x37},
2505          {104, 0x37},
2506          {98, 0x37},
2507          {110, 0x36},
2508          {104, 0x36},
2509          {98, 0x36},
2510          {110, 0x35},
2511          {104, 0x35},
2512          {98, 0x35},
2513          {110, 0x34},
2514          {104, 0x34},
2515          {98, 0x34},
2516          {110, 0x33},
2517          {104, 0x33},
2518          {98, 0x33},
2519          {110, 0x32},
2520          {104, 0x32},
2521          {98, 0x32},
2522          {110, 0x31},
2523          {104, 0x31},
2524          {98, 0x31},
2525          {110, 0x30},
2526          {104, 0x30},
2527          {98, 0x30},
2528          {110, 0x6},
2529          {104, 0x6},
2530          {98, 0x6},
2531          {110, 0x5},
2532          {104, 0x5},
2533          {98, 0x5},
2534          {110, 0x4},
2535          {104, 0x4},
2536          {98, 0x4},
2537          {110, 0x3},
2538          {104, 0x3},
2539          {98, 0x3},
2540          {110, 0x2},
2541          {104, 0x2},
2542          {98, 0x2},
2543          {110, 0x1},
2544          {104, 0x1},
2545          {98, 0x1},
2546          {110, 0x0},
2547          {104, 0x0},
2548          {98, 0x0},
2549          {97, 0},
2550          {96, 0},
2551          {95, 0},
2552          {94, 0},
2553          {93, 0},
2554          {92, 0},
2555          {91, 0},
2556          {90, 0},
2557          {89, 0},
2558          {88, 0},
2559          {87, 0},
2560          {86, 0},
2561          {85, 0},
2562          {84, 0},
2563          {83, 0},
2564          {82, 0},
2565          {81, 0},
2566          {80, 0},
2567          {79, 0},
2568          {78, 0},
2569          {77, 0},
2570          {76, 0},
2571          {75, 0},
2572          {74, 0},
2573          {73, 0},
2574          {72, 0},
2575          {71, 0},
2576          {70, 0},
2577          {69, 0},
2578          {68, 0},
2579          {67, 0},
2580          {66, 0},
2581          {65, 0},
2582          {64, 0},
2583          {63, 0},
2584          {62, 0},
2585          {61, 0},
2586          {60, 0},
2587          {59, 0},
2588          }
2589 };
2590
2591 static int iwl4965_fill_txpower_tbl(struct iwl_priv *priv, u8 band, u16 channel,
2592                                     u8 is_fat, u8 ctrl_chan_high,
2593                                     struct iwl4965_tx_power_db *tx_power_tbl)
2594 {
2595         u8 saturation_power;
2596         s32 target_power;
2597         s32 user_target_power;
2598         s32 power_limit;
2599         s32 current_temp;
2600         s32 reg_limit;
2601         s32 current_regulatory;
2602         s32 txatten_grp = CALIB_CH_GROUP_MAX;
2603         int i;
2604         int c;
2605         const struct iwl_channel_info *ch_info = NULL;
2606         struct iwl4965_eeprom_calib_ch_info ch_eeprom_info;
2607         const struct iwl4965_eeprom_calib_measure *measurement;
2608         s16 voltage;
2609         s32 init_voltage;
2610         s32 voltage_compensation;
2611         s32 degrees_per_05db_num;
2612         s32 degrees_per_05db_denom;
2613         s32 factory_temp;
2614         s32 temperature_comp[2];
2615         s32 factory_gain_index[2];
2616         s32 factory_actual_pwr[2];
2617         s32 power_index;
2618
2619         /* Sanity check requested level (dBm) */
2620         if (priv->user_txpower_limit < IWL_TX_POWER_TARGET_POWER_MIN) {
2621                 IWL_WARNING("Requested user TXPOWER %d below limit.\n",
2622                             priv->user_txpower_limit);
2623                 return -EINVAL;
2624         }
2625         if (priv->user_txpower_limit > IWL_TX_POWER_TARGET_POWER_MAX) {
2626                 IWL_WARNING("Requested user TXPOWER %d above limit.\n",
2627                             priv->user_txpower_limit);
2628                 return -EINVAL;
2629         }
2630
2631         /* user_txpower_limit is in dBm, convert to half-dBm (half-dB units
2632          *   are used for indexing into txpower table) */
2633         user_target_power = 2 * priv->user_txpower_limit;
2634
2635         /* Get current (RXON) channel, band, width */
2636         ch_info =
2637                 iwl4965_get_channel_txpower_info(priv, priv->band, channel);
2638
2639         IWL_DEBUG_TXPOWER("chan %d band %d is_fat %d\n", channel, band,
2640                           is_fat);
2641
2642         if (!ch_info)
2643                 return -EINVAL;
2644
2645         /* get txatten group, used to select 1) thermal txpower adjustment
2646          *   and 2) mimo txpower balance between Tx chains. */
2647         txatten_grp = iwl4965_get_tx_atten_grp(channel);
2648         if (txatten_grp < 0)
2649                 return -EINVAL;
2650
2651         IWL_DEBUG_TXPOWER("channel %d belongs to txatten group %d\n",
2652                           channel, txatten_grp);
2653
2654         if (is_fat) {
2655                 if (ctrl_chan_high)
2656                         channel -= 2;
2657                 else
2658                         channel += 2;
2659         }
2660
2661         /* hardware txpower limits ...
2662          * saturation (clipping distortion) txpowers are in half-dBm */
2663         if (band)
2664                 saturation_power = priv->eeprom.calib_info.saturation_power24;
2665         else
2666                 saturation_power = priv->eeprom.calib_info.saturation_power52;
2667
2668         if (saturation_power < IWL_TX_POWER_SATURATION_MIN ||
2669             saturation_power > IWL_TX_POWER_SATURATION_MAX) {
2670                 if (band)
2671                         saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_24;
2672                 else
2673                         saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_52;
2674         }
2675
2676         /* regulatory txpower limits ... reg_limit values are in half-dBm,
2677          *   max_power_avg values are in dBm, convert * 2 */
2678         if (is_fat)
2679                 reg_limit = ch_info->fat_max_power_avg * 2;
2680         else
2681                 reg_limit = ch_info->max_power_avg * 2;
2682
2683         if ((reg_limit < IWL_TX_POWER_REGULATORY_MIN) ||
2684             (reg_limit > IWL_TX_POWER_REGULATORY_MAX)) {
2685                 if (band)
2686                         reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_24;
2687                 else
2688                         reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_52;
2689         }
2690
2691         /* Interpolate txpower calibration values for this channel,
2692          *   based on factory calibration tests on spaced channels. */
2693         iwl4965_interpolate_chan(priv, channel, &ch_eeprom_info);
2694
2695         /* calculate tx gain adjustment based on power supply voltage */
2696         voltage = priv->eeprom.calib_info.voltage;
2697         init_voltage = (s32)le32_to_cpu(priv->card_alive_init.voltage);
2698         voltage_compensation =
2699             iwl4965_get_voltage_compensation(voltage, init_voltage);
2700
2701         IWL_DEBUG_TXPOWER("curr volt %d eeprom volt %d volt comp %d\n",
2702                           init_voltage,
2703                           voltage, voltage_compensation);
2704
2705         /* get current temperature (Celsius) */
2706         current_temp = max(priv->temperature, IWL_TX_POWER_TEMPERATURE_MIN);
2707         current_temp = min(priv->temperature, IWL_TX_POWER_TEMPERATURE_MAX);
2708         current_temp = KELVIN_TO_CELSIUS(current_temp);
2709
2710         /* select thermal txpower adjustment params, based on channel group
2711          *   (same frequency group used for mimo txatten adjustment) */
2712         degrees_per_05db_num =
2713             tx_power_cmp_tble[txatten_grp].degrees_per_05db_a;
2714         degrees_per_05db_denom =
2715             tx_power_cmp_tble[txatten_grp].degrees_per_05db_a_denom;
2716
2717         /* get per-chain txpower values from factory measurements */
2718         for (c = 0; c < 2; c++) {
2719                 measurement = &ch_eeprom_info.measurements[c][1];
2720
2721                 /* txgain adjustment (in half-dB steps) based on difference
2722                  *   between factory and current temperature */
2723                 factory_temp = measurement->temperature;
2724                 iwl4965_math_div_round((current_temp - factory_temp) *
2725                                        degrees_per_05db_denom,
2726                                        degrees_per_05db_num,
2727                                        &temperature_comp[c]);
2728
2729                 factory_gain_index[c] = measurement->gain_idx;
2730                 factory_actual_pwr[c] = measurement->actual_pow;
2731
2732                 IWL_DEBUG_TXPOWER("chain = %d\n", c);
2733                 IWL_DEBUG_TXPOWER("fctry tmp %d, "
2734                                   "curr tmp %d, comp %d steps\n",
2735                                   factory_temp, current_temp,
2736                                   temperature_comp[c]);
2737
2738                 IWL_DEBUG_TXPOWER("fctry idx %d, fctry pwr %d\n",
2739                                   factory_gain_index[c],
2740                                   factory_actual_pwr[c]);
2741         }
2742
2743         /* for each of 33 bit-rates (including 1 for CCK) */
2744         for (i = 0; i < POWER_TABLE_NUM_ENTRIES; i++) {
2745                 u8 is_mimo_rate;
2746                 union iwl4965_tx_power_dual_stream tx_power;
2747
2748                 /* for mimo, reduce each chain's txpower by half
2749                  * (3dB, 6 steps), so total output power is regulatory
2750                  * compliant. */
2751                 if (i & 0x8) {
2752                         current_regulatory = reg_limit -
2753                             IWL_TX_POWER_MIMO_REGULATORY_COMPENSATION;
2754                         is_mimo_rate = 1;
2755                 } else {
2756                         current_regulatory = reg_limit;
2757                         is_mimo_rate = 0;
2758                 }
2759
2760                 /* find txpower limit, either hardware or regulatory */
2761                 power_limit = saturation_power - back_off_table[i];
2762                 if (power_limit > current_regulatory)
2763                         power_limit = current_regulatory;
2764
2765                 /* reduce user's txpower request if necessary
2766                  * for this rate on this channel */
2767                 target_power = user_target_power;
2768                 if (target_power > power_limit)
2769                         target_power = power_limit;
2770
2771                 IWL_DEBUG_TXPOWER("rate %d sat %d reg %d usr %d tgt %d\n",
2772                                   i, saturation_power - back_off_table[i],
2773                                   current_regulatory, user_target_power,
2774                                   target_power);
2775
2776                 /* for each of 2 Tx chains (radio transmitters) */
2777                 for (c = 0; c < 2; c++) {
2778                         s32 atten_value;
2779
2780                         if (is_mimo_rate)
2781                                 atten_value =
2782                                     (s32)le32_to_cpu(priv->card_alive_init.
2783                                     tx_atten[txatten_grp][c]);
2784                         else
2785                                 atten_value = 0;
2786
2787                         /* calculate index; higher index means lower txpower */
2788                         power_index = (u8) (factory_gain_index[c] -
2789                                             (target_power -
2790                                              factory_actual_pwr[c]) -
2791                                             temperature_comp[c] -
2792                                             voltage_compensation +
2793                                             atten_value);
2794
2795 /*                      IWL_DEBUG_TXPOWER("calculated txpower index %d\n",
2796                                                 power_index); */
2797
2798                         if (power_index < get_min_power_index(i, band))
2799                                 power_index = get_min_power_index(i, band);
2800
2801                         /* adjust 5 GHz index to support negative indexes */
2802                         if (!band)
2803                                 power_index += 9;
2804
2805                         /* CCK, rate 32, reduce txpower for CCK */
2806                         if (i == POWER_TABLE_CCK_ENTRY)
2807                                 power_index +=
2808                                     IWL_TX_POWER_CCK_COMPENSATION_C_STEP;
2809
2810                         /* stay within the table! */
2811                         if (power_index > 107) {
2812                                 IWL_WARNING("txpower index %d > 107\n",
2813                                             power_index);
2814                                 power_index = 107;
2815                         }
2816                         if (power_index < 0) {
2817                                 IWL_WARNING("txpower index %d < 0\n",
2818                                             power_index);
2819                                 power_index = 0;
2820                         }
2821
2822                         /* fill txpower command for this rate/chain */
2823                         tx_power.s.radio_tx_gain[c] =
2824                                 gain_table[band][power_index].radio;
2825                         tx_power.s.dsp_predis_atten[c] =
2826                                 gain_table[band][power_index].dsp;
2827
2828                         IWL_DEBUG_TXPOWER("chain %d mimo %d index %d "
2829                                           "gain 0x%02x dsp %d\n",
2830                                           c, atten_value, power_index,
2831                                         tx_power.s.radio_tx_gain[c],
2832                                         tx_power.s.dsp_predis_atten[c]);
2833                 }/* for each chain */
2834
2835                 tx_power_tbl->power_tbl[i].dw = cpu_to_le32(tx_power.dw);
2836
2837         }/* for each rate */
2838
2839         return 0;
2840 }
2841
2842 /**
2843  * iwl4965_hw_reg_send_txpower - Configure the TXPOWER level user limit
2844  *
2845  * Uses the active RXON for channel, band, and characteristics (fat, high)
2846  * The power limit is taken from priv->user_txpower_limit.
2847  */
2848 int iwl4965_hw_reg_send_txpower(struct iwl_priv *priv)
2849 {
2850         struct iwl4965_txpowertable_cmd cmd = { 0 };
2851         int ret;
2852         u8 band = 0;
2853         u8 is_fat = 0;
2854         u8 ctrl_chan_high = 0;
2855
2856         if (test_bit(STATUS_SCANNING, &priv->status)) {
2857                 /* If this gets hit a lot, switch it to a BUG() and catch
2858                  * the stack trace to find out who is calling this during
2859                  * a scan. */
2860                 IWL_WARNING("TX Power requested while scanning!\n");
2861                 return -EAGAIN;
2862         }
2863
2864         band = priv->band == IEEE80211_BAND_2GHZ;
2865
2866         is_fat =  is_fat_channel(priv->active_rxon.flags);
2867
2868         if (is_fat &&
2869             (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
2870                 ctrl_chan_high = 1;
2871
2872         cmd.band = band;
2873         cmd.channel = priv->active_rxon.channel;
2874
2875         ret = iwl4965_fill_txpower_tbl(priv, band,
2876                                 le16_to_cpu(priv->active_rxon.channel),
2877                                 is_fat, ctrl_chan_high, &cmd.tx_power);
2878         if (ret)
2879                 goto out;
2880
2881         ret = iwl_send_cmd_pdu(priv, REPLY_TX_PWR_TABLE_CMD, sizeof(cmd), &cmd);
2882
2883 out:
2884         return ret;
2885 }
2886
2887 static int iwl4965_send_rxon_assoc(struct iwl_priv *priv)
2888 {
2889         int ret = 0;
2890         struct iwl4965_rxon_assoc_cmd rxon_assoc;
2891         const struct iwl4965_rxon_cmd *rxon1 = &priv->staging_rxon;
2892         const struct iwl4965_rxon_cmd *rxon2 = &priv->active_rxon;
2893
2894         if ((rxon1->flags == rxon2->flags) &&
2895             (rxon1->filter_flags == rxon2->filter_flags) &&
2896             (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
2897             (rxon1->ofdm_ht_single_stream_basic_rates ==
2898              rxon2->ofdm_ht_single_stream_basic_rates) &&
2899             (rxon1->ofdm_ht_dual_stream_basic_rates ==
2900              rxon2->ofdm_ht_dual_stream_basic_rates) &&
2901             (rxon1->rx_chain == rxon2->rx_chain) &&
2902             (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
2903                 IWL_DEBUG_INFO("Using current RXON_ASSOC.  Not resending.\n");
2904                 return 0;
2905         }
2906
2907         rxon_assoc.flags = priv->staging_rxon.flags;
2908         rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
2909         rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
2910         rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
2911         rxon_assoc.reserved = 0;
2912         rxon_assoc.ofdm_ht_single_stream_basic_rates =
2913             priv->staging_rxon.ofdm_ht_single_stream_basic_rates;
2914         rxon_assoc.ofdm_ht_dual_stream_basic_rates =
2915             priv->staging_rxon.ofdm_ht_dual_stream_basic_rates;
2916         rxon_assoc.rx_chain_select_flags = priv->staging_rxon.rx_chain;
2917
2918         ret = iwl_send_cmd_pdu_async(priv, REPLY_RXON_ASSOC,
2919                                      sizeof(rxon_assoc), &rxon_assoc, NULL);
2920         if (ret)
2921                 return ret;
2922
2923         return ret;
2924 }
2925
2926
2927 int iwl4965_hw_channel_switch(struct iwl_priv *priv, u16 channel)
2928 {
2929         int rc;
2930         u8 band = 0;
2931         u8 is_fat = 0;
2932         u8 ctrl_chan_high = 0;
2933         struct iwl4965_channel_switch_cmd cmd = { 0 };
2934         const struct iwl_channel_info *ch_info;
2935
2936         band = priv->band == IEEE80211_BAND_2GHZ;
2937
2938         ch_info = iwl_get_channel_info(priv, priv->band, channel);
2939
2940         is_fat = is_fat_channel(priv->staging_rxon.flags);
2941
2942         if (is_fat &&
2943             (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
2944                 ctrl_chan_high = 1;
2945
2946         cmd.band = band;
2947         cmd.expect_beacon = 0;
2948         cmd.channel = cpu_to_le16(channel);
2949         cmd.rxon_flags = priv->active_rxon.flags;
2950         cmd.rxon_filter_flags = priv->active_rxon.filter_flags;
2951         cmd.switch_time = cpu_to_le32(priv->ucode_beacon_time);
2952         if (ch_info)
2953                 cmd.expect_beacon = is_channel_radar(ch_info);
2954         else
2955                 cmd.expect_beacon = 1;
2956
2957         rc = iwl4965_fill_txpower_tbl(priv, band, channel, is_fat,
2958                                       ctrl_chan_high, &cmd.tx_power);
2959         if (rc) {
2960                 IWL_DEBUG_11H("error:%d  fill txpower_tbl\n", rc);
2961                 return rc;
2962         }
2963
2964         rc = iwl_send_cmd_pdu(priv, REPLY_CHANNEL_SWITCH, sizeof(cmd), &cmd);
2965         return rc;
2966 }
2967
2968 #define RTS_HCCA_RETRY_LIMIT            3
2969 #define RTS_DFAULT_RETRY_LIMIT          60
2970
2971 void iwl4965_hw_build_tx_cmd_rate(struct iwl_priv *priv,
2972                               struct iwl_cmd *cmd,
2973                               struct ieee80211_tx_control *ctrl,
2974                               struct ieee80211_hdr *hdr, int sta_id,
2975                               int is_hcca)
2976 {
2977         struct iwl4965_tx_cmd *tx = &cmd->cmd.tx;
2978         u8 rts_retry_limit = 0;
2979         u8 data_retry_limit = 0;
2980         u16 fc = le16_to_cpu(hdr->frame_control);
2981         u8 rate_plcp;
2982         u16 rate_flags = 0;
2983         int rate_idx = min(ctrl->tx_rate->hw_value & 0xffff, IWL_RATE_COUNT - 1);
2984
2985         rate_plcp = iwl4965_rates[rate_idx].plcp;
2986
2987         rts_retry_limit = (is_hcca) ?
2988             RTS_HCCA_RETRY_LIMIT : RTS_DFAULT_RETRY_LIMIT;
2989
2990         if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
2991                 rate_flags |= RATE_MCS_CCK_MSK;
2992
2993
2994         if (ieee80211_is_probe_response(fc)) {
2995                 data_retry_limit = 3;
2996                 if (data_retry_limit < rts_retry_limit)
2997                         rts_retry_limit = data_retry_limit;
2998         } else
2999                 data_retry_limit = IWL_DEFAULT_TX_RETRY;
3000
3001         if (priv->data_retry_limit != -1)
3002                 data_retry_limit = priv->data_retry_limit;
3003
3004
3005         if (ieee80211_is_data(fc)) {
3006                 tx->initial_rate_index = 0;
3007                 tx->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
3008         } else {
3009                 switch (fc & IEEE80211_FCTL_STYPE) {
3010                 case IEEE80211_STYPE_AUTH:
3011                 case IEEE80211_STYPE_DEAUTH:
3012                 case IEEE80211_STYPE_ASSOC_REQ:
3013                 case IEEE80211_STYPE_REASSOC_REQ:
3014                         if (tx->tx_flags & TX_CMD_FLG_RTS_MSK) {
3015                                 tx->tx_flags &= ~TX_CMD_FLG_RTS_MSK;
3016                                 tx->tx_flags |= TX_CMD_FLG_CTS_MSK;
3017                         }
3018                         break;
3019                 default:
3020                         break;
3021                 }
3022
3023                 /* Alternate between antenna A and B for successive frames */
3024                 if (priv->use_ant_b_for_management_frame) {
3025                         priv->use_ant_b_for_management_frame = 0;
3026                         rate_flags |= RATE_MCS_ANT_B_MSK;
3027                 } else {
3028                         priv->use_ant_b_for_management_frame = 1;
3029                         rate_flags |= RATE_MCS_ANT_A_MSK;
3030                 }
3031         }
3032
3033         tx->rts_retry_limit = rts_retry_limit;
3034         tx->data_retry_limit = data_retry_limit;
3035         tx->rate_n_flags = iwl4965_hw_set_rate_n_flags(rate_plcp, rate_flags);
3036 }
3037
3038 int iwl4965_hw_get_rx_read(struct iwl_priv *priv)
3039 {
3040         struct iwl4965_shared *s = priv->shared_virt;
3041         return le32_to_cpu(s->rb_closed) & 0xFFF;
3042 }
3043
3044 int iwl4965_hw_get_temperature(struct iwl_priv *priv)
3045 {
3046         return priv->temperature;
3047 }
3048
3049 unsigned int iwl4965_hw_get_beacon_cmd(struct iwl_priv *priv,
3050                           struct iwl4965_frame *frame, u8 rate)
3051 {
3052         struct iwl4965_tx_beacon_cmd *tx_beacon_cmd;
3053         unsigned int frame_size;
3054
3055         tx_beacon_cmd = &frame->u.beacon;
3056         memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
3057
3058         tx_beacon_cmd->tx.sta_id = priv->hw_params.bcast_sta_id;
3059         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
3060
3061         frame_size = iwl4965_fill_beacon_frame(priv,
3062                                 tx_beacon_cmd->frame,
3063                                 iwl4965_broadcast_addr,
3064                                 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
3065
3066         BUG_ON(frame_size > MAX_MPDU_SIZE);
3067         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
3068
3069         if ((rate == IWL_RATE_1M_PLCP) || (rate >= IWL_RATE_2M_PLCP))
3070                 tx_beacon_cmd->tx.rate_n_flags =
3071                         iwl4965_hw_set_rate_n_flags(rate, RATE_MCS_CCK_MSK);
3072         else
3073                 tx_beacon_cmd->tx.rate_n_flags =
3074                         iwl4965_hw_set_rate_n_flags(rate, 0);
3075
3076         tx_beacon_cmd->tx.tx_flags = (TX_CMD_FLG_SEQ_CTL_MSK |
3077                                 TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK);
3078         return (sizeof(*tx_beacon_cmd) + frame_size);
3079 }
3080
3081 /*
3082  * Tell 4965 where to find circular buffer of Tx Frame Descriptors for
3083  * given Tx queue, and enable the DMA channel used for that queue.
3084  *
3085  * 4965 supports up to 16 Tx queues in DRAM, mapped to up to 8 Tx DMA
3086  * channels supported in hardware.
3087  */
3088 int iwl4965_hw_tx_queue_init(struct iwl_priv *priv, struct iwl4965_tx_queue *txq)
3089 {
3090         int rc;
3091         unsigned long flags;
3092         int txq_id = txq->q.id;
3093
3094         spin_lock_irqsave(&priv->lock, flags);
3095         rc = iwl_grab_nic_access(priv);
3096         if (rc) {
3097                 spin_unlock_irqrestore(&priv->lock, flags);
3098                 return rc;
3099         }
3100
3101         /* Circular buffer (TFD queue in DRAM) physical base address */
3102         iwl_write_direct32(priv, FH_MEM_CBBC_QUEUE(txq_id),
3103                              txq->q.dma_addr >> 8);
3104
3105         /* Enable DMA channel, using same id as for TFD queue */
3106         iwl_write_direct32(
3107                 priv, IWL_FH_TCSR_CHNL_TX_CONFIG_REG(txq_id),
3108                 IWL_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE |
3109                 IWL_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE_VAL);
3110         iwl_release_nic_access(priv);
3111         spin_unlock_irqrestore(&priv->lock, flags);
3112
3113         return 0;
3114 }
3115
3116 int iwl4965_hw_txq_attach_buf_to_tfd(struct iwl_priv *priv, void *ptr,
3117                                  dma_addr_t addr, u16 len)
3118 {
3119         int index, is_odd;
3120         struct iwl4965_tfd_frame *tfd = ptr;
3121         u32 num_tbs = IWL_GET_BITS(*tfd, num_tbs);
3122
3123         /* Each TFD can point to a maximum 20 Tx buffers */
3124         if ((num_tbs >= MAX_NUM_OF_TBS) || (num_tbs < 0)) {
3125                 IWL_ERROR("Error can not send more than %d chunks\n",
3126                           MAX_NUM_OF_TBS);
3127                 return -EINVAL;
3128         }
3129
3130         index = num_tbs / 2;
3131         is_odd = num_tbs & 0x1;
3132
3133         if (!is_odd) {
3134                 tfd->pa[index].tb1_addr = cpu_to_le32(addr);
3135                 IWL_SET_BITS(tfd->pa[index], tb1_addr_hi,
3136                              iwl_get_dma_hi_address(addr));
3137                 IWL_SET_BITS(tfd->pa[index], tb1_len, len);
3138         } else {
3139                 IWL_SET_BITS(tfd->pa[index], tb2_addr_lo16,
3140                              (u32) (addr & 0xffff));
3141                 IWL_SET_BITS(tfd->pa[index], tb2_addr_hi20, addr >> 16);
3142                 IWL_SET_BITS(tfd->pa[index], tb2_len, len);
3143         }
3144
3145         IWL_SET_BITS(*tfd, num_tbs, num_tbs + 1);
3146
3147         return 0;
3148 }
3149
3150 static void iwl4965_hw_card_show_info(struct iwl_priv *priv)
3151 {
3152         u16 hw_version = priv->eeprom.board_revision_4965;
3153
3154         IWL_DEBUG_INFO("4965ABGN HW Version %u.%u.%u\n",
3155                        ((hw_version >> 8) & 0x0F),
3156                        ((hw_version >> 8) >> 4), (hw_version & 0x00FF));
3157
3158         IWL_DEBUG_INFO("4965ABGN PBA Number %.16s\n",
3159                        priv->eeprom.board_pba_number_4965);
3160 }
3161
3162 #define IWL_TX_CRC_SIZE         4
3163 #define IWL_TX_DELIMITER_SIZE   4
3164
3165 /**
3166  * iwl4965_txq_update_byte_cnt_tbl - Set up entry in Tx byte-count array
3167  */
3168 static void iwl4965_txq_update_byte_cnt_tbl(struct iwl_priv *priv,
3169                                             struct iwl4965_tx_queue *txq,
3170                                             u16 byte_cnt)
3171 {
3172         int len;
3173         int txq_id = txq->q.id;
3174         struct iwl4965_shared *shared_data = priv->shared_virt;
3175
3176         len = byte_cnt + IWL_TX_CRC_SIZE + IWL_TX_DELIMITER_SIZE;
3177
3178         /* Set up byte count within first 256 entries */
3179         IWL_SET_BITS16(shared_data->queues_byte_cnt_tbls[txq_id].
3180                        tfd_offset[txq->q.write_ptr], byte_cnt, len);
3181
3182         /* If within first 64 entries, duplicate at end */
3183         if (txq->q.write_ptr < IWL4965_MAX_WIN_SIZE)
3184                 IWL_SET_BITS16(shared_data->queues_byte_cnt_tbls[txq_id].
3185                         tfd_offset[IWL4965_QUEUE_SIZE + txq->q.write_ptr],
3186                         byte_cnt, len);
3187 }
3188
3189 /**
3190  * iwl4965_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
3191  *
3192  * Selects how many and which Rx receivers/antennas/chains to use.
3193  * This should not be used for scan command ... it puts data in wrong place.
3194  */
3195 void iwl4965_set_rxon_chain(struct iwl_priv *priv)
3196 {
3197         u8 is_single = is_single_stream(priv);
3198         u8 idle_state, rx_state;
3199
3200         priv->staging_rxon.rx_chain = 0;
3201         rx_state = idle_state = 3;
3202
3203         /* Tell uCode which antennas are actually connected.
3204          * Before first association, we assume all antennas are connected.
3205          * Just after first association, iwl4965_noise_calibration()
3206          *    checks which antennas actually *are* connected. */
3207         priv->staging_rxon.rx_chain |=
3208             cpu_to_le16(priv->valid_antenna << RXON_RX_CHAIN_VALID_POS);
3209
3210         /* How many receivers should we use? */
3211         iwl4965_get_rx_chain_counter(priv, &idle_state, &rx_state);
3212         priv->staging_rxon.rx_chain |=
3213                 cpu_to_le16(rx_state << RXON_RX_CHAIN_MIMO_CNT_POS);
3214         priv->staging_rxon.rx_chain |=
3215                 cpu_to_le16(idle_state << RXON_RX_CHAIN_CNT_POS);
3216
3217         if (!is_single && (rx_state >= 2) &&
3218             !test_bit(STATUS_POWER_PMI, &priv->status))
3219                 priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
3220         else
3221                 priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
3222
3223         IWL_DEBUG_ASSOC("rx chain %X\n", priv->staging_rxon.rx_chain);
3224 }
3225
3226 /**
3227  * sign_extend - Sign extend a value using specified bit as sign-bit
3228  *
3229  * Example: sign_extend(9, 3) would return -7 as bit3 of 1001b is 1
3230  * and bit0..2 is 001b which when sign extended to 1111111111111001b is -7.
3231  *
3232  * @param oper value to sign extend
3233  * @param index 0 based bit index (0<=index<32) to sign bit
3234  */
3235 static s32 sign_extend(u32 oper, int index)
3236 {
3237         u8 shift = 31 - index;
3238
3239         return (s32)(oper << shift) >> shift;
3240 }
3241
3242 /**
3243  * iwl4965_get_temperature - return the calibrated temperature (in Kelvin)
3244  * @statistics: Provides the temperature reading from the uCode
3245  *
3246  * A return of <0 indicates bogus data in the statistics
3247  */
3248 int iwl4965_get_temperature(const struct iwl_priv *priv)
3249 {
3250         s32 temperature;
3251         s32 vt;
3252         s32 R1, R2, R3;
3253         u32 R4;
3254
3255         if (test_bit(STATUS_TEMPERATURE, &priv->status) &&
3256                 (priv->statistics.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK)) {
3257                 IWL_DEBUG_TEMP("Running FAT temperature calibration\n");
3258                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[1]);
3259                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[1]);
3260                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[1]);
3261                 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[1]);
3262         } else {
3263                 IWL_DEBUG_TEMP("Running temperature calibration\n");
3264                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[0]);
3265                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[0]);
3266                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[0]);
3267                 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[0]);
3268         }
3269
3270         /*
3271          * Temperature is only 23 bits, so sign extend out to 32.
3272          *
3273          * NOTE If we haven't received a statistics notification yet
3274          * with an updated temperature, use R4 provided to us in the
3275          * "initialize" ALIVE response.
3276          */
3277         if (!test_bit(STATUS_TEMPERATURE, &priv->status))
3278                 vt = sign_extend(R4, 23);
3279         else
3280                 vt = sign_extend(
3281                         le32_to_cpu(priv->statistics.general.temperature), 23);
3282
3283         IWL_DEBUG_TEMP("Calib values R[1-3]: %d %d %d R4: %d\n",
3284                        R1, R2, R3, vt);
3285
3286         if (R3 == R1) {
3287                 IWL_ERROR("Calibration conflict R1 == R3\n");
3288                 return -1;
3289         }
3290
3291         /* Calculate temperature in degrees Kelvin, adjust by 97%.
3292          * Add offset to center the adjustment around 0 degrees Centigrade. */
3293         temperature = TEMPERATURE_CALIB_A_VAL * (vt - R2);
3294         temperature /= (R3 - R1);
3295         temperature = (temperature * 97) / 100 +
3296             TEMPERATURE_CALIB_KELVIN_OFFSET;
3297
3298         IWL_DEBUG_TEMP("Calibrated temperature: %dK, %dC\n", temperature,
3299             KELVIN_TO_CELSIUS(temperature));
3300
3301         return temperature;
3302 }
3303
3304 /* Adjust Txpower only if temperature variance is greater than threshold. */
3305 #define IWL_TEMPERATURE_THRESHOLD   3
3306
3307 /**
3308  * iwl4965_is_temp_calib_needed - determines if new calibration is needed
3309  *
3310  * If the temperature changed has changed sufficiently, then a recalibration
3311  * is needed.
3312  *
3313  * Assumes caller will replace priv->last_temperature once calibration
3314  * executed.
3315  */
3316 static int iwl4965_is_temp_calib_needed(struct iwl_priv *priv)
3317 {
3318         int temp_diff;
3319
3320         if (!test_bit(STATUS_STATISTICS, &priv->status)) {
3321                 IWL_DEBUG_TEMP("Temperature not updated -- no statistics.\n");
3322                 return 0;
3323         }
3324
3325         temp_diff = priv->temperature - priv->last_temperature;
3326
3327         /* get absolute value */
3328         if (temp_diff < 0) {
3329                 IWL_DEBUG_POWER("Getting cooler, delta %d, \n", temp_diff);
3330                 temp_diff = -temp_diff;
3331         } else if (temp_diff == 0)
3332                 IWL_DEBUG_POWER("Same temp, \n");
3333         else
3334                 IWL_DEBUG_POWER("Getting warmer, delta %d, \n", temp_diff);
3335
3336         if (temp_diff < IWL_TEMPERATURE_THRESHOLD) {
3337                 IWL_DEBUG_POWER("Thermal txpower calib not needed\n");
3338                 return 0;
3339         }
3340
3341         IWL_DEBUG_POWER("Thermal txpower calib needed\n");
3342
3343         return 1;
3344 }
3345
3346 /* Calculate noise level, based on measurements during network silence just
3347  *   before arriving beacon.  This measurement can be done only if we know
3348  *   exactly when to expect beacons, therefore only when we're associated. */
3349 static void iwl4965_rx_calc_noise(struct iwl_priv *priv)
3350 {
3351         struct statistics_rx_non_phy *rx_info
3352                                 = &(priv->statistics.rx.general);
3353         int num_active_rx = 0;
3354         int total_silence = 0;
3355         int bcn_silence_a =
3356                 le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER;
3357         int bcn_silence_b =
3358                 le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER;
3359         int bcn_silence_c =
3360                 le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER;
3361
3362         if (bcn_silence_a) {
3363                 total_silence += bcn_silence_a;
3364                 num_active_rx++;
3365         }
3366         if (bcn_silence_b) {
3367                 total_silence += bcn_silence_b;
3368                 num_active_rx++;
3369         }
3370         if (bcn_silence_c) {
3371                 total_silence += bcn_silence_c;
3372                 num_active_rx++;
3373         }
3374
3375         /* Average among active antennas */
3376         if (num_active_rx)
3377                 priv->last_rx_noise = (total_silence / num_active_rx) - 107;
3378         else
3379                 priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
3380
3381         IWL_DEBUG_CALIB("inband silence a %u, b %u, c %u, dBm %d\n",
3382                         bcn_silence_a, bcn_silence_b, bcn_silence_c,
3383                         priv->last_rx_noise);
3384 }
3385
3386 void iwl4965_hw_rx_statistics(struct iwl_priv *priv, struct iwl4965_rx_mem_buffer *rxb)
3387 {
3388         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3389         int change;
3390         s32 temp;
3391
3392         IWL_DEBUG_RX("Statistics notification received (%d vs %d).\n",
3393                      (int)sizeof(priv->statistics), pkt->len);
3394
3395         change = ((priv->statistics.general.temperature !=
3396                    pkt->u.stats.general.temperature) ||
3397                   ((priv->statistics.flag &
3398                     STATISTICS_REPLY_FLG_FAT_MODE_MSK) !=
3399                    (pkt->u.stats.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK)));
3400
3401         memcpy(&priv->statistics, &pkt->u.stats, sizeof(priv->statistics));
3402
3403         set_bit(STATUS_STATISTICS, &priv->status);
3404
3405         /* Reschedule the statistics timer to occur in
3406          * REG_RECALIB_PERIOD seconds to ensure we get a
3407          * thermal update even if the uCode doesn't give
3408          * us one */
3409         mod_timer(&priv->statistics_periodic, jiffies +
3410                   msecs_to_jiffies(REG_RECALIB_PERIOD * 1000));
3411
3412         if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
3413             (pkt->hdr.cmd == STATISTICS_NOTIFICATION)) {
3414                 iwl4965_rx_calc_noise(priv);
3415 #ifdef CONFIG_IWL4965_SENSITIVITY
3416                 queue_work(priv->workqueue, &priv->sensitivity_work);
3417 #endif
3418         }
3419
3420         iwl_leds_background(priv);
3421
3422         /* If the hardware hasn't reported a change in
3423          * temperature then don't bother computing a
3424          * calibrated temperature value */
3425         if (!change)
3426                 return;
3427
3428         temp = iwl4965_get_temperature(priv);
3429         if (temp < 0)
3430                 return;
3431
3432         if (priv->temperature != temp) {
3433                 if (priv->temperature)
3434                         IWL_DEBUG_TEMP("Temperature changed "
3435                                        "from %dC to %dC\n",
3436                                        KELVIN_TO_CELSIUS(priv->temperature),
3437                                        KELVIN_TO_CELSIUS(temp));
3438                 else
3439                         IWL_DEBUG_TEMP("Temperature "
3440                                        "initialized to %dC\n",
3441                                        KELVIN_TO_CELSIUS(temp));
3442         }
3443
3444         priv->temperature = temp;
3445         set_bit(STATUS_TEMPERATURE, &priv->status);
3446
3447         if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
3448                      iwl4965_is_temp_calib_needed(priv))
3449                 queue_work(priv->workqueue, &priv->txpower_work);
3450 }
3451
3452 static void iwl4965_add_radiotap(struct iwl_priv *priv,
3453                                  struct sk_buff *skb,
3454                                  struct iwl4965_rx_phy_res *rx_start,
3455                                  struct ieee80211_rx_status *stats,
3456                                  u32 ampdu_status)
3457 {
3458         s8 signal = stats->ssi;
3459         s8 noise = 0;
3460         int rate = stats->rate_idx;
3461         u64 tsf = stats->mactime;
3462         __le16 antenna;
3463         __le16 phy_flags_hw = rx_start->phy_flags;
3464         struct iwl4965_rt_rx_hdr {
3465                 struct ieee80211_radiotap_header rt_hdr;
3466                 __le64 rt_tsf;          /* TSF */
3467                 u8 rt_flags;            /* radiotap packet flags */
3468                 u8 rt_rate;             /* rate in 500kb/s */
3469                 __le16 rt_channelMHz;   /* channel in MHz */
3470                 __le16 rt_chbitmask;    /* channel bitfield */
3471                 s8 rt_dbmsignal;        /* signal in dBm, kluged to signed */
3472                 s8 rt_dbmnoise;
3473                 u8 rt_antenna;          /* antenna number */
3474         } __attribute__ ((packed)) *iwl4965_rt;
3475
3476         /* TODO: We won't have enough headroom for HT frames. Fix it later. */
3477         if (skb_headroom(skb) < sizeof(*iwl4965_rt)) {
3478                 if (net_ratelimit())
3479                         printk(KERN_ERR "not enough headroom [%d] for "
3480                                "radiotap head [%zd]\n",
3481                                skb_headroom(skb), sizeof(*iwl4965_rt));
3482                 return;
3483         }
3484
3485         /* put radiotap header in front of 802.11 header and data */
3486         iwl4965_rt = (void *)skb_push(skb, sizeof(*iwl4965_rt));
3487
3488         /* initialise radiotap header */
3489         iwl4965_rt->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
3490         iwl4965_rt->rt_hdr.it_pad = 0;
3491
3492         /* total header + data */
3493         put_unaligned(cpu_to_le16(sizeof(*iwl4965_rt)),
3494                       &iwl4965_rt->rt_hdr.it_len);
3495
3496         /* Indicate all the fields we add to the radiotap header */
3497         put_unaligned(cpu_to_le32((1 << IEEE80211_RADIOTAP_TSFT) |
3498                                   (1 << IEEE80211_RADIOTAP_FLAGS) |
3499                                   (1 << IEEE80211_RADIOTAP_RATE) |
3500                                   (1 << IEEE80211_RADIOTAP_CHANNEL) |
3501                                   (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL) |
3502                                   (1 << IEEE80211_RADIOTAP_DBM_ANTNOISE) |
3503                                   (1 << IEEE80211_RADIOTAP_ANTENNA)),
3504                       &iwl4965_rt->rt_hdr.it_present);
3505
3506         /* Zero the flags, we'll add to them as we go */
3507         iwl4965_rt->rt_flags = 0;
3508
3509         put_unaligned(cpu_to_le64(tsf), &iwl4965_rt->rt_tsf);
3510
3511         iwl4965_rt->rt_dbmsignal = signal;
3512         iwl4965_rt->rt_dbmnoise = noise;
3513
3514         /* Convert the channel frequency and set the flags */
3515         put_unaligned(cpu_to_le16(stats->freq), &iwl4965_rt->rt_channelMHz);
3516         if (!(phy_flags_hw & RX_RES_PHY_FLAGS_BAND_24_MSK))
3517                 put_unaligned(cpu_to_le16(IEEE80211_CHAN_OFDM |
3518                                           IEEE80211_CHAN_5GHZ),
3519                               &iwl4965_rt->rt_chbitmask);
3520         else if (phy_flags_hw & RX_RES_PHY_FLAGS_MOD_CCK_MSK)
3521                 put_unaligned(cpu_to_le16(IEEE80211_CHAN_CCK |
3522                                           IEEE80211_CHAN_2GHZ),
3523                               &iwl4965_rt->rt_chbitmask);
3524         else    /* 802.11g */
3525                 put_unaligned(cpu_to_le16(IEEE80211_CHAN_OFDM |
3526                                           IEEE80211_CHAN_2GHZ),
3527                               &iwl4965_rt->rt_chbitmask);
3528
3529         if (rate == -1)
3530                 iwl4965_rt->rt_rate = 0;
3531         else {
3532                 if (stats->band == IEEE80211_BAND_5GHZ)
3533                         rate += IWL_FIRST_OFDM_RATE;
3534
3535                 iwl4965_rt->rt_rate = iwl4965_rates[rate].ieee;
3536         }
3537
3538         /*
3539          * "antenna number"
3540          *
3541          * It seems that the antenna field in the phy flags value
3542          * is actually a bitfield. This is undefined by radiotap,
3543          * it wants an actual antenna number but I always get "7"
3544          * for most legacy frames I receive indicating that the
3545          * same frame was received on all three RX chains.
3546          *
3547          * I think this field should be removed in favour of a
3548          * new 802.11n radiotap field "RX chains" that is defined
3549          * as a bitmask.
3550          */
3551         antenna = phy_flags_hw & RX_RES_PHY_FLAGS_ANTENNA_MSK;
3552         iwl4965_rt->rt_antenna = le16_to_cpu(antenna) >> 4;
3553
3554         /* set the preamble flag if appropriate */
3555         if (phy_flags_hw & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
3556                 iwl4965_rt->rt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;
3557
3558         stats->flag |= RX_FLAG_RADIOTAP;
3559 }
3560
3561 static void iwl_update_rx_stats(struct iwl_priv *priv, u16 fc, u16 len)
3562 {
3563         /* 0 - mgmt, 1 - cnt, 2 - data */
3564         int idx = (fc & IEEE80211_FCTL_FTYPE) >> 2;
3565         priv->rx_stats[idx].cnt++;
3566         priv->rx_stats[idx].bytes += len;
3567 }
3568
3569 static u32 iwl4965_translate_rx_status(u32 decrypt_in)
3570 {
3571         u32 decrypt_out = 0;
3572
3573         if ((decrypt_in & RX_RES_STATUS_STATION_FOUND) ==
3574                                         RX_RES_STATUS_STATION_FOUND)
3575                 decrypt_out |= (RX_RES_STATUS_STATION_FOUND |
3576                                 RX_RES_STATUS_NO_STATION_INFO_MISMATCH);
3577
3578         decrypt_out |= (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK);
3579
3580         /* packet was not encrypted */
3581         if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
3582                                         RX_RES_STATUS_SEC_TYPE_NONE)
3583                 return decrypt_out;
3584
3585         /* packet was encrypted with unknown alg */
3586         if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
3587                                         RX_RES_STATUS_SEC_TYPE_ERR)
3588                 return decrypt_out;
3589
3590         /* decryption was not done in HW */
3591         if ((decrypt_in & RX_MPDU_RES_STATUS_DEC_DONE_MSK) !=
3592                                         RX_MPDU_RES_STATUS_DEC_DONE_MSK)
3593                 return decrypt_out;
3594
3595         switch (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) {
3596
3597         case RX_RES_STATUS_SEC_TYPE_CCMP:
3598                 /* alg is CCM: check MIC only */
3599                 if (!(decrypt_in & RX_MPDU_RES_STATUS_MIC_OK))
3600                         /* Bad MIC */
3601                         decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
3602                 else
3603                         decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
3604
3605                 break;
3606
3607         case RX_RES_STATUS_SEC_TYPE_TKIP:
3608                 if (!(decrypt_in & RX_MPDU_RES_STATUS_TTAK_OK)) {
3609                         /* Bad TTAK */
3610                         decrypt_out |= RX_RES_STATUS_BAD_KEY_TTAK;
3611                         break;
3612                 }
3613                 /* fall through if TTAK OK */
3614         default:
3615                 if (!(decrypt_in & RX_MPDU_RES_STATUS_ICV_OK))
3616                         decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
3617                 else
3618                         decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
3619                 break;
3620         };
3621
3622         IWL_DEBUG_RX("decrypt_in:0x%x  decrypt_out = 0x%x\n",
3623                                         decrypt_in, decrypt_out);
3624
3625         return decrypt_out;
3626 }
3627
3628 static void iwl4965_handle_data_packet(struct iwl_priv *priv, int is_data,
3629                                        int include_phy,
3630                                        struct iwl4965_rx_mem_buffer *rxb,
3631                                        struct ieee80211_rx_status *stats)
3632 {
3633         struct iwl4965_rx_packet *pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
3634         struct iwl4965_rx_phy_res *rx_start = (include_phy) ?
3635             (struct iwl4965_rx_phy_res *)&(pkt->u.raw[0]) : NULL;
3636         struct ieee80211_hdr *hdr;
3637         u16 len;
3638         __le32 *rx_end;
3639         unsigned int skblen;
3640         u32 ampdu_status;
3641         u32 ampdu_status_legacy;
3642
3643         if (!include_phy && priv->last_phy_res[0])
3644                 rx_start = (struct iwl4965_rx_phy_res *)&priv->last_phy_res[1];
3645
3646         if (!rx_start) {
3647                 IWL_ERROR("MPDU frame without a PHY data\n");
3648                 return;
3649         }
3650         if (include_phy) {
3651                 hdr = (struct ieee80211_hdr *)((u8 *) & rx_start[1] +
3652                                                rx_start->cfg_phy_cnt);
3653
3654                 len = le16_to_cpu(rx_start->byte_count);
3655
3656                 rx_end = (__le32 *) ((u8 *) & pkt->u.raw[0] +
3657                                   sizeof(struct iwl4965_rx_phy_res) +
3658                                   rx_start->cfg_phy_cnt + len);
3659
3660         } else {
3661                 struct iwl4965_rx_mpdu_res_start *amsdu =
3662                     (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw;
3663
3664                 hdr = (struct ieee80211_hdr *)(pkt->u.raw +
3665                                sizeof(struct iwl4965_rx_mpdu_res_start));
3666                 len =  le16_to_cpu(amsdu->byte_count);
3667                 rx_start->byte_count = amsdu->byte_count;
3668                 rx_end = (__le32 *) (((u8 *) hdr) + len);
3669         }
3670         if (len > priv->hw_params.max_pkt_size || len < 16) {
3671                 IWL_WARNING("byte count out of range [16,4K] : %d\n", len);
3672                 return;
3673         }
3674
3675         ampdu_status = le32_to_cpu(*rx_end);
3676         skblen = ((u8 *) rx_end - (u8 *) & pkt->u.raw[0]) + sizeof(u32);
3677
3678         if (!include_phy) {
3679                 /* New status scheme, need to translate */
3680                 ampdu_status_legacy = ampdu_status;
3681                 ampdu_status = iwl4965_translate_rx_status(ampdu_status);
3682         }
3683
3684         /* start from MAC */
3685         skb_reserve(rxb->skb, (void *)hdr - (void *)pkt);
3686         skb_put(rxb->skb, len); /* end where data ends */
3687
3688         /* We only process data packets if the interface is open */
3689         if (unlikely(!priv->is_open)) {
3690                 IWL_DEBUG_DROP_LIMIT
3691                     ("Dropping packet while interface is not open.\n");
3692                 return;
3693         }
3694
3695         stats->flag = 0;
3696         hdr = (struct ieee80211_hdr *)rxb->skb->data;
3697
3698         if (!priv->cfg->mod_params->sw_crypto)
3699                 iwl4965_set_decrypted_flag(priv, rxb->skb, ampdu_status, stats);
3700
3701         if (priv->add_radiotap)
3702                 iwl4965_add_radiotap(priv, rxb->skb, rx_start, stats, ampdu_status);
3703
3704         iwl_update_rx_stats(priv, le16_to_cpu(hdr->frame_control), len);
3705         ieee80211_rx_irqsafe(priv->hw, rxb->skb, stats);
3706         priv->alloc_rxb_skb--;
3707         rxb->skb = NULL;
3708 }
3709
3710 /* Calc max signal level (dBm) among 3 possible receivers */
3711 static int iwl4965_calc_rssi(struct iwl4965_rx_phy_res *rx_resp)
3712 {
3713         /* data from PHY/DSP regarding signal strength, etc.,
3714          *   contents are always there, not configurable by host.  */
3715         struct iwl4965_rx_non_cfg_phy *ncphy =
3716             (struct iwl4965_rx_non_cfg_phy *)rx_resp->non_cfg_phy;
3717         u32 agc = (le16_to_cpu(ncphy->agc_info) & IWL_AGC_DB_MASK)
3718                         >> IWL_AGC_DB_POS;
3719
3720         u32 valid_antennae =
3721             (le16_to_cpu(rx_resp->phy_flags) & RX_PHY_FLAGS_ANTENNAE_MASK)
3722                         >> RX_PHY_FLAGS_ANTENNAE_OFFSET;
3723         u8 max_rssi = 0;
3724         u32 i;
3725
3726         /* Find max rssi among 3 possible receivers.
3727          * These values are measured by the digital signal processor (DSP).
3728          * They should stay fairly constant even as the signal strength varies,
3729          *   if the radio's automatic gain control (AGC) is working right.
3730          * AGC value (see below) will provide the "interesting" info. */
3731         for (i = 0; i < 3; i++)
3732                 if (valid_antennae & (1 << i))
3733                         max_rssi = max(ncphy->rssi_info[i << 1], max_rssi);
3734
3735         IWL_DEBUG_STATS("Rssi In A %d B %d C %d Max %d AGC dB %d\n",
3736                 ncphy->rssi_info[0], ncphy->rssi_info[2], ncphy->rssi_info[4],
3737                 max_rssi, agc);
3738
3739         /* dBm = max_rssi dB - agc dB - constant.
3740          * Higher AGC (higher radio gain) means lower signal. */
3741         return (max_rssi - agc - IWL_RSSI_OFFSET);
3742 }
3743
3744 #ifdef CONFIG_IWL4965_HT
3745
3746 void iwl4965_init_ht_hw_capab(struct iwl_priv *priv,
3747                               struct ieee80211_ht_info *ht_info,
3748                               enum ieee80211_band band)
3749 {
3750         ht_info->cap = 0;
3751         memset(ht_info->supp_mcs_set, 0, 16);
3752
3753         ht_info->ht_supported = 1;
3754
3755         if (band == IEEE80211_BAND_5GHZ) {
3756                 ht_info->cap |= (u16)IEEE80211_HT_CAP_SUP_WIDTH;
3757                 ht_info->cap |= (u16)IEEE80211_HT_CAP_SGI_40;
3758                 ht_info->supp_mcs_set[4] = 0x01;
3759         }
3760         ht_info->cap |= (u16)IEEE80211_HT_CAP_GRN_FLD;
3761         ht_info->cap |= (u16)IEEE80211_HT_CAP_SGI_20;
3762         ht_info->cap |= (u16)(IEEE80211_HT_CAP_MIMO_PS &
3763                              (IWL_MIMO_PS_NONE << 2));
3764
3765         if (priv->cfg->mod_params->amsdu_size_8K)
3766                 ht_info->cap |= (u16)IEEE80211_HT_CAP_MAX_AMSDU;
3767
3768         ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
3769         ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
3770
3771         ht_info->supp_mcs_set[0] = 0xFF;
3772         ht_info->supp_mcs_set[1] = 0xFF;
3773 }
3774 #endif /* CONFIG_IWL4965_HT */
3775
3776 static void iwl4965_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
3777 {
3778         unsigned long flags;
3779
3780         spin_lock_irqsave(&priv->sta_lock, flags);
3781         priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
3782         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
3783         priv->stations[sta_id].sta.sta.modify_mask = 0;
3784         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3785         spin_unlock_irqrestore(&priv->sta_lock, flags);
3786
3787         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
3788 }
3789
3790 static void iwl4965_update_ps_mode(struct iwl_priv *priv, u16 ps_bit, u8 *addr)
3791 {
3792         /* FIXME: need locking over ps_status ??? */
3793         u8 sta_id = iwl4965_hw_find_station(priv, addr);
3794
3795         if (sta_id != IWL_INVALID_STATION) {
3796                 u8 sta_awake = priv->stations[sta_id].
3797                                 ps_status == STA_PS_STATUS_WAKE;
3798
3799                 if (sta_awake && ps_bit)
3800                         priv->stations[sta_id].ps_status = STA_PS_STATUS_SLEEP;
3801                 else if (!sta_awake && !ps_bit) {
3802                         iwl4965_sta_modify_ps_wake(priv, sta_id);
3803                         priv->stations[sta_id].ps_status = STA_PS_STATUS_WAKE;
3804                 }
3805         }
3806 }
3807 #ifdef CONFIG_IWLWIFI_DEBUG
3808
3809 /**
3810  * iwl4965_dbg_report_frame - dump frame to syslog during debug sessions
3811  *
3812  * You may hack this function to show different aspects of received frames,
3813  * including selective frame dumps.
3814  * group100 parameter selects whether to show 1 out of 100 good frames.
3815  *
3816  * TODO:  This was originally written for 3945, need to audit for
3817  *        proper operation with 4965.
3818  */
3819 static void iwl4965_dbg_report_frame(struct iwl_priv *priv,
3820                       struct iwl4965_rx_packet *pkt,
3821                       struct ieee80211_hdr *header, int group100)
3822 {
3823         u32 to_us;
3824         u32 print_summary = 0;
3825         u32 print_dump = 0;     /* set to 1 to dump all frames' contents */
3826         u32 hundred = 0;
3827         u32 dataframe = 0;
3828         u16 fc;
3829         u16 seq_ctl;
3830         u16 channel;
3831         u16 phy_flags;
3832         int rate_sym;
3833         u16 length;
3834         u16 status;
3835         u16 bcn_tmr;
3836         u32 tsf_low;
3837         u64 tsf;
3838         u8 rssi;
3839         u8 agc;
3840         u16 sig_avg;
3841         u16 noise_diff;
3842         struct iwl4965_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
3843         struct iwl4965_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
3844         struct iwl4965_rx_frame_end *rx_end = IWL_RX_END(pkt);
3845         u8 *data = IWL_RX_DATA(pkt);
3846
3847         if (likely(!(iwl_debug_level & IWL_DL_RX)))
3848                 return;
3849
3850         /* MAC header */
3851         fc = le16_to_cpu(header->frame_control);
3852         seq_ctl = le16_to_cpu(header->seq_ctrl);
3853
3854         /* metadata */
3855         channel = le16_to_cpu(rx_hdr->channel);
3856         phy_flags = le16_to_cpu(rx_hdr->phy_flags);
3857         rate_sym = rx_hdr->rate;
3858         length = le16_to_cpu(rx_hdr->len);
3859
3860         /* end-of-frame status and timestamp */
3861         status = le32_to_cpu(rx_end->status);
3862         bcn_tmr = le32_to_cpu(rx_end->beacon_timestamp);
3863         tsf_low = le64_to_cpu(rx_end->timestamp) & 0x0ffffffff;
3864         tsf = le64_to_cpu(rx_end->timestamp);
3865
3866         /* signal statistics */
3867         rssi = rx_stats->rssi;
3868         agc = rx_stats->agc;
3869         sig_avg = le16_to_cpu(rx_stats->sig_avg);
3870         noise_diff = le16_to_cpu(rx_stats->noise_diff);
3871
3872         to_us = !compare_ether_addr(header->addr1, priv->mac_addr);
3873
3874         /* if data frame is to us and all is good,
3875          *   (optionally) print summary for only 1 out of every 100 */
3876         if (to_us && (fc & ~IEEE80211_FCTL_PROTECTED) ==
3877             (IEEE80211_FCTL_FROMDS | IEEE80211_FTYPE_DATA)) {
3878                 dataframe = 1;
3879                 if (!group100)
3880                         print_summary = 1;      /* print each frame */
3881                 else if (priv->framecnt_to_us < 100) {
3882                         priv->framecnt_to_us++;
3883                         print_summary = 0;
3884                 } else {
3885                         priv->framecnt_to_us = 0;
3886                         print_summary = 1;
3887                         hundred = 1;
3888                 }
3889         } else {
3890                 /* print summary for all other frames */
3891                 print_summary = 1;
3892         }
3893
3894         if (print_summary) {
3895                 char *title;
3896                 int rate_idx;
3897                 u32 bitrate;
3898
3899                 if (hundred)
3900                         title = "100Frames";
3901                 else if (fc & IEEE80211_FCTL_RETRY)
3902                         title = "Retry";
3903                 else if (ieee80211_is_assoc_response(fc))
3904                         title = "AscRsp";
3905                 else if (ieee80211_is_reassoc_response(fc))
3906                         title = "RasRsp";
3907                 else if (ieee80211_is_probe_response(fc)) {
3908                         title = "PrbRsp";
3909                         print_dump = 1; /* dump frame contents */
3910                 } else if (ieee80211_is_beacon(fc)) {
3911                         title = "Beacon";
3912                         print_dump = 1; /* dump frame contents */
3913                 } else if (ieee80211_is_atim(fc))
3914                         title = "ATIM";
3915                 else if (ieee80211_is_auth(fc))
3916                         title = "Auth";
3917                 else if (ieee80211_is_deauth(fc))
3918                         title = "DeAuth";
3919                 else if (ieee80211_is_disassoc(fc))
3920                         title = "DisAssoc";
3921                 else
3922                         title = "Frame";
3923
3924                 rate_idx = iwl4965_hwrate_to_plcp_idx(rate_sym);
3925                 if (unlikely(rate_idx == -1))
3926                         bitrate = 0;
3927                 else
3928                         bitrate = iwl4965_rates[rate_idx].ieee / 2;
3929
3930                 /* print frame summary.
3931                  * MAC addresses show just the last byte (for brevity),
3932                  *    but you can hack it to show more, if you'd like to. */
3933                 if (dataframe)
3934                         IWL_DEBUG_RX("%s: mhd=0x%04x, dst=0x%02x, "
3935                                      "len=%u, rssi=%d, chnl=%d, rate=%u, \n",
3936                                      title, fc, header->addr1[5],
3937                                      length, rssi, channel, bitrate);
3938                 else {
3939                         /* src/dst addresses assume managed mode */
3940                         IWL_DEBUG_RX("%s: 0x%04x, dst=0x%02x, "
3941                                      "src=0x%02x, rssi=%u, tim=%lu usec, "
3942                                      "phy=0x%02x, chnl=%d\n",
3943                                      title, fc, header->addr1[5],
3944                                      header->addr3[5], rssi,
3945                                      tsf_low - priv->scan_start_tsf,
3946                                      phy_flags, channel);
3947                 }
3948         }
3949         if (print_dump)
3950                 iwl_print_hex_dump(IWL_DL_RX, data, length);
3951 }
3952 #else
3953 static inline void iwl4965_dbg_report_frame(struct iwl_priv *priv,
3954                                             struct iwl4965_rx_packet *pkt,
3955                                             struct ieee80211_hdr *header,
3956                                             int group100)
3957 {
3958 }
3959 #endif
3960
3961
3962
3963 /* Called for REPLY_RX (legacy ABG frames), or
3964  * REPLY_RX_MPDU_CMD (HT high-throughput N frames). */
3965 static void iwl4965_rx_reply_rx(struct iwl_priv *priv,
3966                                 struct iwl4965_rx_mem_buffer *rxb)
3967 {
3968         struct ieee80211_hdr *header;
3969         struct ieee80211_rx_status rx_status;
3970         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3971         /* Use phy data (Rx signal strength, etc.) contained within
3972          *   this rx packet for legacy frames,
3973          *   or phy data cached from REPLY_RX_PHY_CMD for HT frames. */
3974         int include_phy = (pkt->hdr.cmd == REPLY_RX);
3975         struct iwl4965_rx_phy_res *rx_start = (include_phy) ?
3976                 (struct iwl4965_rx_phy_res *)&(pkt->u.raw[0]) :
3977                 (struct iwl4965_rx_phy_res *)&priv->last_phy_res[1];
3978         __le32 *rx_end;
3979         unsigned int len = 0;
3980         u16 fc;
3981         u8 network_packet;
3982
3983         rx_status.mactime = le64_to_cpu(rx_start->timestamp);
3984         rx_status.freq =
3985                 ieee80211_channel_to_frequency(le16_to_cpu(rx_start->channel));
3986         rx_status.band = (rx_start->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ?
3987                                 IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
3988         rx_status.rate_idx =
3989                 iwl4965_hwrate_to_plcp_idx(le32_to_cpu(rx_start->rate_n_flags));
3990         if (rx_status.band == IEEE80211_BAND_5GHZ)
3991                 rx_status.rate_idx -= IWL_FIRST_OFDM_RATE;
3992
3993         rx_status.antenna = 0;
3994         rx_status.flag = 0;
3995
3996         if ((unlikely(rx_start->cfg_phy_cnt > 20))) {
3997                 IWL_DEBUG_DROP("dsp size out of range [0,20]: %d/n",
3998                                 rx_start->cfg_phy_cnt);
3999                 return;
4000         }
4001
4002         if (!include_phy) {
4003                 if (priv->last_phy_res[0])
4004                         rx_start = (struct iwl4965_rx_phy_res *)
4005                                 &priv->last_phy_res[1];
4006                 else
4007                         rx_start = NULL;
4008         }
4009
4010         if (!rx_start) {
4011                 IWL_ERROR("MPDU frame without a PHY data\n");
4012                 return;
4013         }
4014
4015         if (include_phy) {
4016                 header = (struct ieee80211_hdr *)((u8 *) & rx_start[1]
4017                                                   + rx_start->cfg_phy_cnt);
4018
4019                 len = le16_to_cpu(rx_start->byte_count);
4020                 rx_end = (__le32 *)(pkt->u.raw + rx_start->cfg_phy_cnt +
4021                                   sizeof(struct iwl4965_rx_phy_res) + len);
4022         } else {
4023                 struct iwl4965_rx_mpdu_res_start *amsdu =
4024                         (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw;
4025
4026                 header = (void *)(pkt->u.raw +
4027                         sizeof(struct iwl4965_rx_mpdu_res_start));
4028                 len = le16_to_cpu(amsdu->byte_count);
4029                 rx_end = (__le32 *) (pkt->u.raw +
4030                         sizeof(struct iwl4965_rx_mpdu_res_start) + len);
4031         }
4032
4033         if (!(*rx_end & RX_RES_STATUS_NO_CRC32_ERROR) ||
4034             !(*rx_end & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
4035                 IWL_DEBUG_RX("Bad CRC or FIFO: 0x%08X.\n",
4036                                 le32_to_cpu(*rx_end));
4037                 return;
4038         }
4039
4040         priv->ucode_beacon_time = le32_to_cpu(rx_start->beacon_time_stamp);
4041
4042         /* Find max signal strength (dBm) among 3 antenna/receiver chains */
4043         rx_status.ssi = iwl4965_calc_rssi(rx_start);
4044
4045         /* Meaningful noise values are available only from beacon statistics,
4046          *   which are gathered only when associated, and indicate noise
4047          *   only for the associated network channel ...
4048          * Ignore these noise values while scanning (other channels) */
4049         if (iwl_is_associated(priv) &&
4050             !test_bit(STATUS_SCANNING, &priv->status)) {
4051                 rx_status.noise = priv->last_rx_noise;
4052                 rx_status.signal = iwl4965_calc_sig_qual(rx_status.ssi,
4053                                                          rx_status.noise);
4054         } else {
4055                 rx_status.noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
4056                 rx_status.signal = iwl4965_calc_sig_qual(rx_status.ssi, 0);
4057         }
4058
4059         /* Reset beacon noise level if not associated. */
4060         if (!iwl_is_associated(priv))
4061                 priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
4062
4063         /* Set "1" to report good data frames in groups of 100 */
4064         /* FIXME: need to optimze the call: */
4065         iwl4965_dbg_report_frame(priv, pkt, header, 1);
4066
4067         IWL_DEBUG_STATS_LIMIT("Rssi %d, noise %d, qual %d, TSF %llu\n",
4068                               rx_status.ssi, rx_status.noise, rx_status.signal,
4069                               (unsigned long long)rx_status.mactime);
4070
4071         network_packet = iwl4965_is_network_packet(priv, header);
4072         if (network_packet) {
4073                 priv->last_rx_rssi = rx_status.ssi;
4074                 priv->last_beacon_time =  priv->ucode_beacon_time;
4075                 priv->last_tsf = le64_to_cpu(rx_start->timestamp);
4076         }
4077
4078         fc = le16_to_cpu(header->frame_control);
4079         switch (fc & IEEE80211_FCTL_FTYPE) {
4080         case IEEE80211_FTYPE_MGMT:
4081                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
4082                         iwl4965_update_ps_mode(priv, fc  & IEEE80211_FCTL_PM,
4083                                                 header->addr2);
4084                 iwl4965_handle_data_packet(priv, 0, include_phy, rxb, &rx_status);
4085                 break;
4086
4087         case IEEE80211_FTYPE_CTL:
4088 #ifdef CONFIG_IWL4965_HT
4089                 switch (fc & IEEE80211_FCTL_STYPE) {
4090                 case IEEE80211_STYPE_BACK_REQ:
4091                         IWL_DEBUG_HT("IEEE80211_STYPE_BACK_REQ arrived\n");
4092                         iwl4965_handle_data_packet(priv, 0, include_phy,
4093                                                 rxb, &rx_status);
4094                         break;
4095                 default:
4096                         break;
4097                 }
4098 #endif
4099                 break;
4100
4101         case IEEE80211_FTYPE_DATA: {
4102                 DECLARE_MAC_BUF(mac1);
4103                 DECLARE_MAC_BUF(mac2);
4104                 DECLARE_MAC_BUF(mac3);
4105
4106                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
4107                         iwl4965_update_ps_mode(priv, fc  & IEEE80211_FCTL_PM,
4108                                                 header->addr2);
4109
4110                 if (unlikely(!network_packet))
4111                         IWL_DEBUG_DROP("Dropping (non network): "
4112                                        "%s, %s, %s\n",
4113                                        print_mac(mac1, header->addr1),
4114                                        print_mac(mac2, header->addr2),
4115                                        print_mac(mac3, header->addr3));
4116                 else if (unlikely(iwl4965_is_duplicate_packet(priv, header)))
4117                         IWL_DEBUG_DROP("Dropping (dup): %s, %s, %s\n",
4118                                        print_mac(mac1, header->addr1),
4119                                        print_mac(mac2, header->addr2),
4120                                        print_mac(mac3, header->addr3));
4121                 else
4122                         iwl4965_handle_data_packet(priv, 1, include_phy, rxb,
4123                                                    &rx_status);
4124                 break;
4125         }
4126         default:
4127                 break;
4128
4129         }
4130 }
4131
4132 /* Cache phy data (Rx signal strength, etc) for HT frame (REPLY_RX_PHY_CMD).
4133  * This will be used later in iwl4965_rx_reply_rx() for REPLY_RX_MPDU_CMD. */
4134 static void iwl4965_rx_reply_rx_phy(struct iwl_priv *priv,
4135                                     struct iwl4965_rx_mem_buffer *rxb)
4136 {
4137         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
4138         priv->last_phy_res[0] = 1;
4139         memcpy(&priv->last_phy_res[1], &(pkt->u.raw[0]),
4140                sizeof(struct iwl4965_rx_phy_res));
4141 }
4142 static void iwl4965_rx_missed_beacon_notif(struct iwl_priv *priv,
4143                                            struct iwl4965_rx_mem_buffer *rxb)
4144
4145 {
4146 #ifdef CONFIG_IWL4965_SENSITIVITY
4147         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
4148         struct iwl4965_missed_beacon_notif *missed_beacon;
4149
4150         missed_beacon = &pkt->u.missed_beacon;
4151         if (le32_to_cpu(missed_beacon->consequtive_missed_beacons) > 5) {
4152                 IWL_DEBUG_CALIB("missed bcn cnsq %d totl %d rcd %d expctd %d\n",
4153                     le32_to_cpu(missed_beacon->consequtive_missed_beacons),
4154                     le32_to_cpu(missed_beacon->total_missed_becons),
4155                     le32_to_cpu(missed_beacon->num_recvd_beacons),
4156                     le32_to_cpu(missed_beacon->num_expected_beacons));
4157                 priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
4158                 if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)))
4159                         queue_work(priv->workqueue, &priv->sensitivity_work);
4160         }
4161 #endif /*CONFIG_IWL4965_SENSITIVITY*/
4162 }
4163 #ifdef CONFIG_IWL4965_HT
4164
4165 /**
4166  * iwl4965_sta_modify_enable_tid_tx - Enable Tx for this TID in station table
4167  */
4168 static void iwl4965_sta_modify_enable_tid_tx(struct iwl_priv *priv,
4169                                          int sta_id, int tid)
4170 {
4171         unsigned long flags;
4172
4173         /* Remove "disable" flag, to enable Tx for this TID */
4174         spin_lock_irqsave(&priv->sta_lock, flags);
4175         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
4176         priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
4177         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
4178         spin_unlock_irqrestore(&priv->sta_lock, flags);
4179
4180         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
4181 }
4182
4183 /**
4184  * iwl4965_tx_status_reply_compressed_ba - Update tx status from block-ack
4185  *
4186  * Go through block-ack's bitmap of ACK'd frames, update driver's record of
4187  * ACK vs. not.  This gets sent to mac80211, then to rate scaling algo.
4188  */
4189 static int iwl4965_tx_status_reply_compressed_ba(struct iwl_priv *priv,
4190                                                  struct iwl4965_ht_agg *agg,
4191                                                  struct iwl4965_compressed_ba_resp*
4192                                                  ba_resp)
4193
4194 {
4195         int i, sh, ack;
4196         u16 seq_ctl = le16_to_cpu(ba_resp->seq_ctl);
4197         u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
4198         u64 bitmap;
4199         int successes = 0;
4200         struct ieee80211_tx_status *tx_status;
4201
4202         if (unlikely(!agg->wait_for_ba))  {
4203                 IWL_ERROR("Received BA when not expected\n");
4204                 return -EINVAL;
4205         }
4206
4207         /* Mark that the expected block-ack response arrived */
4208         agg->wait_for_ba = 0;
4209         IWL_DEBUG_TX_REPLY("BA %d %d\n", agg->start_idx, ba_resp->seq_ctl);
4210
4211         /* Calculate shift to align block-ack bits with our Tx window bits */
4212         sh = agg->start_idx - SEQ_TO_INDEX(seq_ctl>>4);
4213         if (sh < 0) /* tbw something is wrong with indices */
4214                 sh += 0x100;
4215
4216         /* don't use 64-bit values for now */
4217         bitmap = le64_to_cpu(ba_resp->bitmap) >> sh;
4218
4219         if (agg->frame_count > (64 - sh)) {
4220                 IWL_DEBUG_TX_REPLY("more frames than bitmap size");
4221                 return -1;
4222         }
4223
4224         /* check for success or failure according to the
4225          * transmitted bitmap and block-ack bitmap */
4226         bitmap &= agg->bitmap;
4227
4228         /* For each frame attempted in aggregation,
4229          * update driver's record of tx frame's status. */
4230         for (i = 0; i < agg->frame_count ; i++) {
4231                 ack = bitmap & (1 << i);
4232                 successes += !!ack;
4233                 IWL_DEBUG_TX_REPLY("%s ON i=%d idx=%d raw=%d\n",
4234                         ack? "ACK":"NACK", i, (agg->start_idx + i) & 0xff,
4235                         agg->start_idx + i);
4236         }
4237
4238         tx_status = &priv->txq[scd_flow].txb[agg->start_idx].status;
4239         tx_status->flags = IEEE80211_TX_STATUS_ACK;
4240         tx_status->flags |= IEEE80211_TX_STATUS_AMPDU;
4241         tx_status->ampdu_ack_map = successes;
4242         tx_status->ampdu_ack_len = agg->frame_count;
4243         iwl4965_hwrate_to_tx_control(priv, agg->rate_n_flags,
4244                                      &tx_status->control);
4245
4246         IWL_DEBUG_TX_REPLY("Bitmap %llx\n", (unsigned long long)bitmap);
4247
4248         return 0;
4249 }
4250
4251 /**
4252  * iwl4965_tx_queue_stop_scheduler - Stop queue, but keep configuration
4253  */
4254 static void iwl4965_tx_queue_stop_scheduler(struct iwl_priv *priv,
4255                                             u16 txq_id)
4256 {
4257         /* Simply stop the queue, but don't change any configuration;
4258          * the SCD_ACT_EN bit is the write-enable mask for the ACTIVE bit. */
4259         iwl_write_prph(priv,
4260                 IWL49_SCD_QUEUE_STATUS_BITS(txq_id),
4261                 (0 << SCD_QUEUE_STTS_REG_POS_ACTIVE)|
4262                 (1 << SCD_QUEUE_STTS_REG_POS_SCD_ACT_EN));
4263 }
4264
4265 /**
4266  * txq_id must be greater than IWL_BACK_QUEUE_FIRST_ID
4267  * priv->lock must be held by the caller
4268  */
4269 static int iwl4965_tx_queue_agg_disable(struct iwl_priv *priv, u16 txq_id,
4270                                         u16 ssn_idx, u8 tx_fifo)
4271 {
4272         int ret = 0;
4273
4274         if (IWL_BACK_QUEUE_FIRST_ID > txq_id) {
4275                 IWL_WARNING("queue number too small: %d, must be > %d\n",
4276                                 txq_id, IWL_BACK_QUEUE_FIRST_ID);
4277                 return -EINVAL;
4278         }
4279
4280         ret = iwl_grab_nic_access(priv);
4281         if (ret)
4282                 return ret;
4283
4284         iwl4965_tx_queue_stop_scheduler(priv, txq_id);
4285
4286         iwl_clear_bits_prph(priv, IWL49_SCD_QUEUECHAIN_SEL, (1 << txq_id));
4287
4288         priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
4289         priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
4290         /* supposes that ssn_idx is valid (!= 0xFFF) */
4291         iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
4292
4293         iwl_clear_bits_prph(priv, IWL49_SCD_INTERRUPT_MASK, (1 << txq_id));
4294         iwl4965_txq_ctx_deactivate(priv, txq_id);
4295         iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 0);
4296
4297         iwl_release_nic_access(priv);
4298
4299         return 0;
4300 }
4301
4302 int iwl4965_check_empty_hw_queue(struct iwl_priv *priv, int sta_id,
4303                                          u8 tid, int txq_id)
4304 {
4305         struct iwl4965_queue *q = &priv->txq[txq_id].q;
4306         u8 *addr = priv->stations[sta_id].sta.sta.addr;
4307         struct iwl4965_tid_data *tid_data = &priv->stations[sta_id].tid[tid];
4308
4309         switch (priv->stations[sta_id].tid[tid].agg.state) {
4310         case IWL_EMPTYING_HW_QUEUE_DELBA:
4311                 /* We are reclaiming the last packet of the */
4312                 /* aggregated HW queue */
4313                 if (txq_id  == tid_data->agg.txq_id &&
4314                     q->read_ptr == q->write_ptr) {
4315                         u16 ssn = SEQ_TO_SN(tid_data->seq_number);
4316                         int tx_fifo = default_tid_to_tx_fifo[tid];
4317                         IWL_DEBUG_HT("HW queue empty: continue DELBA flow\n");
4318                         iwl4965_tx_queue_agg_disable(priv, txq_id,
4319                                                      ssn, tx_fifo);
4320                         tid_data->agg.state = IWL_AGG_OFF;
4321                         ieee80211_stop_tx_ba_cb_irqsafe(priv->hw, addr, tid);
4322                 }
4323                 break;
4324         case IWL_EMPTYING_HW_QUEUE_ADDBA:
4325                 /* We are reclaiming the last packet of the queue */
4326                 if (tid_data->tfds_in_queue == 0) {
4327                         IWL_DEBUG_HT("HW queue empty: continue ADDBA flow\n");
4328                         tid_data->agg.state = IWL_AGG_ON;
4329                         ieee80211_start_tx_ba_cb_irqsafe(priv->hw, addr, tid);
4330                 }
4331                 break;
4332         }
4333         return 0;
4334 }
4335
4336 /**
4337  * iwl4965_queue_dec_wrap - Decrement queue index, wrap back to end if needed
4338  * @index -- current index
4339  * @n_bd -- total number of entries in queue (s/b power of 2)
4340  */
4341 static inline int iwl4965_queue_dec_wrap(int index, int n_bd)
4342 {
4343         return (index == 0) ? n_bd - 1 : index - 1;
4344 }
4345
4346 /**
4347  * iwl4965_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
4348  *
4349  * Handles block-acknowledge notification from device, which reports success
4350  * of frames sent via aggregation.
4351  */
4352 static void iwl4965_rx_reply_compressed_ba(struct iwl_priv *priv,
4353                                            struct iwl4965_rx_mem_buffer *rxb)
4354 {
4355         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
4356         struct iwl4965_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba;
4357         int index;
4358         struct iwl4965_tx_queue *txq = NULL;
4359         struct iwl4965_ht_agg *agg;
4360         DECLARE_MAC_BUF(mac);
4361
4362         /* "flow" corresponds to Tx queue */
4363         u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
4364
4365         /* "ssn" is start of block-ack Tx window, corresponds to index
4366          * (in Tx queue's circular buffer) of first TFD/frame in window */
4367         u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
4368
4369         if (scd_flow >= priv->hw_params.max_txq_num) {
4370                 IWL_ERROR("BUG_ON scd_flow is bigger than number of queues");
4371                 return;
4372         }
4373
4374         txq = &priv->txq[scd_flow];
4375         agg = &priv->stations[ba_resp->sta_id].tid[ba_resp->tid].agg;
4376
4377         /* Find index just before block-ack window */
4378         index = iwl4965_queue_dec_wrap(ba_resp_scd_ssn & 0xff, txq->q.n_bd);
4379
4380         /* TODO: Need to get this copy more safely - now good for debug */
4381
4382         IWL_DEBUG_TX_REPLY("REPLY_COMPRESSED_BA [%d]Received from %s, "
4383                            "sta_id = %d\n",
4384                            agg->wait_for_ba,
4385                            print_mac(mac, (u8*) &ba_resp->sta_addr_lo32),
4386                            ba_resp->sta_id);
4387         IWL_DEBUG_TX_REPLY("TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = "
4388                            "%d, scd_ssn = %d\n",
4389                            ba_resp->tid,
4390                            ba_resp->seq_ctl,
4391                            (unsigned long long)le64_to_cpu(ba_resp->bitmap),
4392                            ba_resp->scd_flow,
4393                            ba_resp->scd_ssn);
4394         IWL_DEBUG_TX_REPLY("DAT start_idx = %d, bitmap = 0x%llx \n",
4395                            agg->start_idx,
4396                            (unsigned long long)agg->bitmap);
4397
4398         /* Update driver's record of ACK vs. not for each frame in window */
4399         iwl4965_tx_status_reply_compressed_ba(priv, agg, ba_resp);
4400
4401         /* Release all TFDs before the SSN, i.e. all TFDs in front of
4402          * block-ack window (we assume that they've been successfully
4403          * transmitted ... if not, it's too late anyway). */
4404         if (txq->q.read_ptr != (ba_resp_scd_ssn & 0xff)) {
4405                 int freed = iwl4965_tx_queue_reclaim(priv, scd_flow, index);
4406                 priv->stations[ba_resp->sta_id].
4407                         tid[ba_resp->tid].tfds_in_queue -= freed;
4408                 if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
4409                         priv->mac80211_registered &&
4410                         agg->state != IWL_EMPTYING_HW_QUEUE_DELBA)
4411                         ieee80211_wake_queue(priv->hw, scd_flow);
4412                 iwl4965_check_empty_hw_queue(priv, ba_resp->sta_id,
4413                         ba_resp->tid, scd_flow);
4414         }
4415 }
4416
4417 /**
4418  * iwl4965_tx_queue_set_q2ratid - Map unique receiver/tid combination to a queue
4419  */
4420 static int iwl4965_tx_queue_set_q2ratid(struct iwl_priv *priv, u16 ra_tid,
4421                                         u16 txq_id)
4422 {
4423         u32 tbl_dw_addr;
4424         u32 tbl_dw;
4425         u16 scd_q2ratid;
4426
4427         scd_q2ratid = ra_tid & SCD_QUEUE_RA_TID_MAP_RATID_MSK;
4428
4429         tbl_dw_addr = priv->scd_base_addr +
4430                         SCD_TRANSLATE_TBL_OFFSET_QUEUE(txq_id);
4431
4432         tbl_dw = iwl_read_targ_mem(priv, tbl_dw_addr);
4433
4434         if (txq_id & 0x1)
4435                 tbl_dw = (scd_q2ratid << 16) | (tbl_dw & 0x0000FFFF);
4436         else
4437                 tbl_dw = scd_q2ratid | (tbl_dw & 0xFFFF0000);
4438
4439         iwl_write_targ_mem(priv, tbl_dw_addr, tbl_dw);
4440
4441         return 0;
4442 }
4443
4444
4445 /**
4446  * iwl4965_tx_queue_agg_enable - Set up & enable aggregation for selected queue
4447  *
4448  * NOTE:  txq_id must be greater than IWL_BACK_QUEUE_FIRST_ID,
4449  *        i.e. it must be one of the higher queues used for aggregation
4450  */
4451 static int iwl4965_tx_queue_agg_enable(struct iwl_priv *priv, int txq_id,
4452                                        int tx_fifo, int sta_id, int tid,
4453                                        u16 ssn_idx)
4454 {
4455         unsigned long flags;
4456         int rc;
4457         u16 ra_tid;
4458
4459         if (IWL_BACK_QUEUE_FIRST_ID > txq_id)
4460                 IWL_WARNING("queue number too small: %d, must be > %d\n",
4461                         txq_id, IWL_BACK_QUEUE_FIRST_ID);
4462
4463         ra_tid = BUILD_RAxTID(sta_id, tid);
4464
4465         /* Modify device's station table to Tx this TID */
4466         iwl4965_sta_modify_enable_tid_tx(priv, sta_id, tid);
4467
4468         spin_lock_irqsave(&priv->lock, flags);
4469         rc = iwl_grab_nic_access(priv);
4470         if (rc) {
4471                 spin_unlock_irqrestore(&priv->lock, flags);
4472                 return rc;
4473         }
4474
4475         /* Stop this Tx queue before configuring it */
4476         iwl4965_tx_queue_stop_scheduler(priv, txq_id);
4477
4478         /* Map receiver-address / traffic-ID to this queue */
4479         iwl4965_tx_queue_set_q2ratid(priv, ra_tid, txq_id);
4480
4481         /* Set this queue as a chain-building queue */
4482         iwl_set_bits_prph(priv, IWL49_SCD_QUEUECHAIN_SEL, (1 << txq_id));
4483
4484         /* Place first TFD at index corresponding to start sequence number.
4485          * Assumes that ssn_idx is valid (!= 0xFFF) */
4486         priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
4487         priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
4488         iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
4489
4490         /* Set up Tx window size and frame limit for this queue */
4491         iwl_write_targ_mem(priv,
4492                         priv->scd_base_addr + SCD_CONTEXT_QUEUE_OFFSET(txq_id),
4493                         (SCD_WIN_SIZE << SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
4494                         SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
4495
4496         iwl_write_targ_mem(priv, priv->scd_base_addr +
4497                         SCD_CONTEXT_QUEUE_OFFSET(txq_id) + sizeof(u32),
4498                         (SCD_FRAME_LIMIT << SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS)
4499                         & SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
4500
4501         iwl_set_bits_prph(priv, IWL49_SCD_INTERRUPT_MASK, (1 << txq_id));
4502
4503         /* Set up Status area in SRAM, map to Tx DMA/FIFO, activate the queue */
4504         iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 1);
4505
4506         iwl_release_nic_access(priv);
4507         spin_unlock_irqrestore(&priv->lock, flags);
4508
4509         return 0;
4510 }
4511
4512 #endif /* CONFIG_IWL4965_HT */
4513
4514 /**
4515  * iwl4965_add_station - Initialize a station's hardware rate table
4516  *
4517  * The uCode's station table contains a table of fallback rates
4518  * for automatic fallback during transmission.
4519  *
4520  * NOTE: This sets up a default set of values.  These will be replaced later
4521  *       if the driver's iwl-4965-rs rate scaling algorithm is used, instead of
4522  *       rc80211_simple.
4523  *
4524  * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
4525  *       calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
4526  *       which requires station table entry to exist).
4527  */
4528 void iwl4965_add_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
4529 {
4530         int i, r;
4531         struct iwl_link_quality_cmd link_cmd = {
4532                 .reserved1 = 0,
4533         };
4534         u16 rate_flags;
4535
4536         /* Set up the rate scaling to start at selected rate, fall back
4537          * all the way down to 1M in IEEE order, and then spin on 1M */
4538         if (is_ap)
4539                 r = IWL_RATE_54M_INDEX;
4540         else if (priv->band == IEEE80211_BAND_5GHZ)
4541                 r = IWL_RATE_6M_INDEX;
4542         else
4543                 r = IWL_RATE_1M_INDEX;
4544
4545         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
4546                 rate_flags = 0;
4547                 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
4548                         rate_flags |= RATE_MCS_CCK_MSK;
4549
4550                 /* Use Tx antenna B only */
4551                 rate_flags |= RATE_MCS_ANT_B_MSK;
4552                 rate_flags &= ~RATE_MCS_ANT_A_MSK;
4553
4554                 link_cmd.rs_table[i].rate_n_flags =
4555                         iwl4965_hw_set_rate_n_flags(iwl4965_rates[r].plcp, rate_flags);
4556                 r = iwl4965_get_prev_ieee_rate(r);
4557         }
4558
4559         link_cmd.general_params.single_stream_ant_msk = 2;
4560         link_cmd.general_params.dual_stream_ant_msk = 3;
4561         link_cmd.agg_params.agg_dis_start_th = 3;
4562         link_cmd.agg_params.agg_time_limit = cpu_to_le16(4000);
4563
4564         /* Update the rate scaling for control frame Tx to AP */
4565         link_cmd.sta_id = is_ap ? IWL_AP_ID : priv->hw_params.bcast_sta_id;
4566
4567         iwl_send_cmd_pdu_async(priv, REPLY_TX_LINK_QUALITY_CMD,
4568                                sizeof(link_cmd), &link_cmd, NULL);
4569 }
4570
4571 #ifdef CONFIG_IWL4965_HT
4572
4573 static u8 iwl4965_is_channel_extension(struct iwl_priv *priv,
4574                                        enum ieee80211_band band,
4575                                        u16 channel, u8 extension_chan_offset)
4576 {
4577         const struct iwl_channel_info *ch_info;
4578
4579         ch_info = iwl_get_channel_info(priv, band, channel);
4580         if (!is_channel_valid(ch_info))
4581                 return 0;
4582
4583         if (extension_chan_offset == IWL_EXT_CHANNEL_OFFSET_NONE)
4584                 return 0;
4585
4586         if ((ch_info->fat_extension_channel == extension_chan_offset) ||
4587             (ch_info->fat_extension_channel == HT_IE_EXT_CHANNEL_MAX))
4588                 return 1;
4589
4590         return 0;
4591 }
4592
4593 static u8 iwl4965_is_fat_tx_allowed(struct iwl_priv *priv,
4594                                 struct ieee80211_ht_info *sta_ht_inf)
4595 {
4596         struct iwl_ht_info *iwl_ht_conf = &priv->current_ht_config;
4597
4598         if ((!iwl_ht_conf->is_ht) ||
4599            (iwl_ht_conf->supported_chan_width != IWL_CHANNEL_WIDTH_40MHZ) ||
4600            (iwl_ht_conf->extension_chan_offset == IWL_EXT_CHANNEL_OFFSET_NONE))
4601                 return 0;
4602
4603         if (sta_ht_inf) {
4604                 if ((!sta_ht_inf->ht_supported) ||
4605                    (!(sta_ht_inf->cap & IEEE80211_HT_CAP_SUP_WIDTH)))
4606                         return 0;
4607         }
4608
4609         return (iwl4965_is_channel_extension(priv, priv->band,
4610                                          iwl_ht_conf->control_channel,
4611                                          iwl_ht_conf->extension_chan_offset));
4612 }
4613
4614 void iwl4965_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_info *ht_info)
4615 {
4616         struct iwl4965_rxon_cmd *rxon = &priv->staging_rxon;
4617         u32 val;
4618
4619         if (!ht_info->is_ht)
4620                 return;
4621
4622         /* Set up channel bandwidth:  20 MHz only, or 20/40 mixed if fat ok */
4623         if (iwl4965_is_fat_tx_allowed(priv, NULL))
4624                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED_MSK;
4625         else
4626                 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
4627                                  RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
4628
4629         if (le16_to_cpu(rxon->channel) != ht_info->control_channel) {
4630                 IWL_DEBUG_ASSOC("control diff than current %d %d\n",
4631                                 le16_to_cpu(rxon->channel),
4632                                 ht_info->control_channel);
4633                 rxon->channel = cpu_to_le16(ht_info->control_channel);
4634                 return;
4635         }
4636
4637         /* Note: control channel is opposite of extension channel */
4638         switch (ht_info->extension_chan_offset) {
4639         case IWL_EXT_CHANNEL_OFFSET_ABOVE:
4640                 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
4641                 break;
4642         case IWL_EXT_CHANNEL_OFFSET_BELOW:
4643                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
4644                 break;
4645         case IWL_EXT_CHANNEL_OFFSET_NONE:
4646         default:
4647                 rxon->flags &= ~RXON_FLG_CHANNEL_MODE_MIXED_MSK;
4648                 break;
4649         }
4650
4651         val = ht_info->ht_protection;
4652
4653         rxon->flags |= cpu_to_le32(val << RXON_FLG_HT_OPERATING_MODE_POS);
4654
4655         iwl4965_set_rxon_chain(priv);
4656
4657         IWL_DEBUG_ASSOC("supported HT rate 0x%X %X "
4658                         "rxon flags 0x%X operation mode :0x%X "
4659                         "extension channel offset 0x%x "
4660                         "control chan %d\n",
4661                         ht_info->supp_mcs_set[0], ht_info->supp_mcs_set[1],
4662                         le32_to_cpu(rxon->flags), ht_info->ht_protection,
4663                         ht_info->extension_chan_offset,
4664                         ht_info->control_channel);
4665         return;
4666 }
4667
4668 void iwl4965_set_ht_add_station(struct iwl_priv *priv, u8 index,
4669                                 struct ieee80211_ht_info *sta_ht_inf)
4670 {
4671         __le32 sta_flags;
4672         u8 mimo_ps_mode;
4673
4674         if (!sta_ht_inf || !sta_ht_inf->ht_supported)
4675                 goto done;
4676
4677         mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2;
4678
4679         sta_flags = priv->stations[index].sta.station_flags;
4680
4681         sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
4682
4683         switch (mimo_ps_mode) {
4684         case WLAN_HT_CAP_MIMO_PS_STATIC:
4685                 sta_flags |= STA_FLG_MIMO_DIS_MSK;
4686                 break;
4687         case WLAN_HT_CAP_MIMO_PS_DYNAMIC:
4688                 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
4689                 break;
4690         case WLAN_HT_CAP_MIMO_PS_DISABLED:
4691                 break;
4692         default:
4693                 IWL_WARNING("Invalid MIMO PS mode %d", mimo_ps_mode);
4694                 break;
4695         }
4696
4697         sta_flags |= cpu_to_le32(
4698               (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
4699
4700         sta_flags |= cpu_to_le32(
4701               (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
4702
4703         if (iwl4965_is_fat_tx_allowed(priv, sta_ht_inf))
4704                 sta_flags |= STA_FLG_FAT_EN_MSK;
4705         else
4706                 sta_flags &= ~STA_FLG_FAT_EN_MSK;
4707
4708         priv->stations[index].sta.station_flags = sta_flags;
4709  done:
4710         return;
4711 }
4712
4713 static void iwl4965_sta_modify_add_ba_tid(struct iwl_priv *priv,
4714                                           int sta_id, int tid, u16 ssn)
4715 {
4716         unsigned long flags;
4717
4718         spin_lock_irqsave(&priv->sta_lock, flags);
4719         priv->stations[sta_id].sta.station_flags_msk = 0;
4720         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
4721         priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
4722         priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
4723         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
4724         spin_unlock_irqrestore(&priv->sta_lock, flags);
4725
4726         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
4727 }
4728
4729 static void iwl4965_sta_modify_del_ba_tid(struct iwl_priv *priv,
4730                                           int sta_id, int tid)
4731 {
4732         unsigned long flags;
4733
4734         spin_lock_irqsave(&priv->sta_lock, flags);
4735         priv->stations[sta_id].sta.station_flags_msk = 0;
4736         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
4737         priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
4738         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
4739         spin_unlock_irqrestore(&priv->sta_lock, flags);
4740
4741         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
4742 }
4743
4744 /*
4745  * Find first available (lowest unused) Tx Queue, mark it "active".
4746  * Called only when finding queue for aggregation.
4747  * Should never return anything < 7, because they should already
4748  * be in use as EDCA AC (0-3), Command (4), HCCA (5, 6).
4749  */
4750 static int iwl4965_txq_ctx_activate_free(struct iwl_priv *priv)
4751 {
4752         int txq_id;
4753
4754         for (txq_id = 0; txq_id < priv->hw_params.max_txq_num; txq_id++)
4755                 if (!test_and_set_bit(txq_id, &priv->txq_ctx_active_msk))
4756                         return txq_id;
4757         return -1;
4758 }
4759
4760 static int iwl4965_mac_ht_tx_agg_start(struct ieee80211_hw *hw, const u8 *da,
4761                                        u16 tid, u16 *start_seq_num)
4762 {
4763         struct iwl_priv *priv = hw->priv;
4764         int sta_id;
4765         int tx_fifo;
4766         int txq_id;
4767         int ssn = -1;
4768         int ret = 0;
4769         unsigned long flags;
4770         struct iwl4965_tid_data *tid_data;
4771         DECLARE_MAC_BUF(mac);
4772
4773         if (likely(tid < ARRAY_SIZE(default_tid_to_tx_fifo)))
4774                 tx_fifo = default_tid_to_tx_fifo[tid];
4775         else
4776                 return -EINVAL;
4777
4778         IWL_WARNING("%s on da = %s tid = %d\n",
4779                         __func__, print_mac(mac, da), tid);
4780
4781         sta_id = iwl4965_hw_find_station(priv, da);
4782         if (sta_id == IWL_INVALID_STATION)
4783                 return -ENXIO;
4784
4785         if (priv->stations[sta_id].tid[tid].agg.state != IWL_AGG_OFF) {
4786                 IWL_ERROR("Start AGG when state is not IWL_AGG_OFF !\n");
4787                 return -ENXIO;
4788         }
4789
4790         txq_id = iwl4965_txq_ctx_activate_free(priv);
4791         if (txq_id == -1)
4792                 return -ENXIO;
4793
4794         spin_lock_irqsave(&priv->sta_lock, flags);
4795         tid_data = &priv->stations[sta_id].tid[tid];
4796         ssn = SEQ_TO_SN(tid_data->seq_number);
4797         tid_data->agg.txq_id = txq_id;
4798         spin_unlock_irqrestore(&priv->sta_lock, flags);
4799
4800         *start_seq_num = ssn;
4801         ret = iwl4965_tx_queue_agg_enable(priv, txq_id, tx_fifo,
4802                                           sta_id, tid, ssn);
4803         if (ret)
4804                 return ret;
4805
4806         ret = 0;
4807         if (tid_data->tfds_in_queue == 0) {
4808                 printk(KERN_ERR "HW queue is empty\n");
4809                 tid_data->agg.state = IWL_AGG_ON;
4810                 ieee80211_start_tx_ba_cb_irqsafe(hw, da, tid);
4811         } else {
4812                 IWL_DEBUG_HT("HW queue is NOT empty: %d packets in HW queue\n",
4813                                 tid_data->tfds_in_queue);
4814                 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA;
4815         }
4816         return ret;
4817 }
4818
4819 static int iwl4965_mac_ht_tx_agg_stop(struct ieee80211_hw *hw, const u8 *da,
4820                                       u16 tid)
4821 {
4822
4823         struct iwl_priv *priv = hw->priv;
4824         int tx_fifo_id, txq_id, sta_id, ssn = -1;
4825         struct iwl4965_tid_data *tid_data;
4826         int ret, write_ptr, read_ptr;
4827         unsigned long flags;
4828         DECLARE_MAC_BUF(mac);
4829
4830         if (!da) {
4831                 IWL_ERROR("da = NULL\n");
4832                 return -EINVAL;
4833         }
4834
4835         if (likely(tid < ARRAY_SIZE(default_tid_to_tx_fifo)))
4836                 tx_fifo_id = default_tid_to_tx_fifo[tid];
4837         else
4838                 return -EINVAL;
4839
4840         sta_id = iwl4965_hw_find_station(priv, da);
4841
4842         if (sta_id == IWL_INVALID_STATION)
4843                 return -ENXIO;
4844
4845         if (priv->stations[sta_id].tid[tid].agg.state != IWL_AGG_ON)
4846                 IWL_WARNING("Stopping AGG while state not IWL_AGG_ON\n");
4847
4848         tid_data = &priv->stations[sta_id].tid[tid];
4849         ssn = (tid_data->seq_number & IEEE80211_SCTL_SEQ) >> 4;
4850         txq_id = tid_data->agg.txq_id;
4851         write_ptr = priv->txq[txq_id].q.write_ptr;
4852         read_ptr = priv->txq[txq_id].q.read_ptr;
4853
4854         /* The queue is not empty */
4855         if (write_ptr != read_ptr) {
4856                 IWL_DEBUG_HT("Stopping a non empty AGG HW QUEUE\n");
4857                 priv->stations[sta_id].tid[tid].agg.state =
4858                                 IWL_EMPTYING_HW_QUEUE_DELBA;
4859                 return 0;
4860         }
4861
4862         IWL_DEBUG_HT("HW queue empty\n");;
4863         priv->stations[sta_id].tid[tid].agg.state = IWL_AGG_OFF;
4864
4865         spin_lock_irqsave(&priv->lock, flags);
4866         ret = iwl4965_tx_queue_agg_disable(priv, txq_id, ssn, tx_fifo_id);
4867         spin_unlock_irqrestore(&priv->lock, flags);
4868
4869         if (ret)
4870                 return ret;
4871
4872         ieee80211_stop_tx_ba_cb_irqsafe(priv->hw, da, tid);
4873
4874         IWL_DEBUG_INFO("iwl4965_mac_ht_tx_agg_stop on da=%s tid=%d\n",
4875                         print_mac(mac, da), tid);
4876
4877         return 0;
4878 }
4879
4880 int iwl4965_mac_ampdu_action(struct ieee80211_hw *hw,
4881                              enum ieee80211_ampdu_mlme_action action,
4882                              const u8 *addr, u16 tid, u16 *ssn)
4883 {
4884         struct iwl_priv *priv = hw->priv;
4885         int sta_id;
4886         DECLARE_MAC_BUF(mac);
4887
4888         IWL_DEBUG_HT("A-MPDU action on da=%s tid=%d ",
4889                         print_mac(mac, addr), tid);
4890         sta_id = iwl4965_hw_find_station(priv, addr);
4891         switch (action) {
4892         case IEEE80211_AMPDU_RX_START:
4893                 IWL_DEBUG_HT("start Rx\n");
4894                 iwl4965_sta_modify_add_ba_tid(priv, sta_id, tid, *ssn);
4895                 break;
4896         case IEEE80211_AMPDU_RX_STOP:
4897                 IWL_DEBUG_HT("stop Rx\n");
4898                 iwl4965_sta_modify_del_ba_tid(priv, sta_id, tid);
4899                 break;
4900         case IEEE80211_AMPDU_TX_START:
4901                 IWL_DEBUG_HT("start Tx\n");
4902                 return iwl4965_mac_ht_tx_agg_start(hw, addr, tid, ssn);
4903         case IEEE80211_AMPDU_TX_STOP:
4904                 IWL_DEBUG_HT("stop Tx\n");
4905                 return iwl4965_mac_ht_tx_agg_stop(hw, addr, tid);
4906         default:
4907                 IWL_DEBUG_HT("unknown\n");
4908                 return -EINVAL;
4909                 break;
4910         }
4911         return 0;
4912 }
4913
4914 #endif /* CONFIG_IWL4965_HT */
4915
4916 /* Set up 4965-specific Rx frame reply handlers */
4917 void iwl4965_hw_rx_handler_setup(struct iwl_priv *priv)
4918 {
4919         /* Legacy Rx frames */
4920         priv->rx_handlers[REPLY_RX] = iwl4965_rx_reply_rx;
4921
4922         /* High-throughput (HT) Rx frames */
4923         priv->rx_handlers[REPLY_RX_PHY_CMD] = iwl4965_rx_reply_rx_phy;
4924         priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwl4965_rx_reply_rx;
4925
4926         priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] =
4927             iwl4965_rx_missed_beacon_notif;
4928
4929 #ifdef CONFIG_IWL4965_HT
4930         priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl4965_rx_reply_compressed_ba;
4931 #endif /* CONFIG_IWL4965_HT */
4932 }
4933
4934 void iwl4965_hw_setup_deferred_work(struct iwl_priv *priv)
4935 {
4936         INIT_WORK(&priv->txpower_work, iwl4965_bg_txpower_work);
4937 #ifdef CONFIG_IWL4965_SENSITIVITY
4938         INIT_WORK(&priv->sensitivity_work, iwl4965_bg_sensitivity_work);
4939 #endif
4940         init_timer(&priv->statistics_periodic);
4941         priv->statistics_periodic.data = (unsigned long)priv;
4942         priv->statistics_periodic.function = iwl4965_bg_statistics_periodic;
4943 }
4944
4945 void iwl4965_hw_cancel_deferred_work(struct iwl_priv *priv)
4946 {
4947         del_timer_sync(&priv->statistics_periodic);
4948
4949         cancel_delayed_work(&priv->init_alive_start);
4950 }
4951
4952
4953 static struct iwl_hcmd_ops iwl4965_hcmd = {
4954         .rxon_assoc = iwl4965_send_rxon_assoc,
4955 };
4956
4957 static struct iwl_hcmd_utils_ops iwl4965_hcmd_utils = {
4958         .enqueue_hcmd = iwl4965_enqueue_hcmd,
4959 };
4960
4961 static struct iwl_lib_ops iwl4965_lib = {
4962         .init_drv = iwl4965_init_drv,
4963         .set_hw_params = iwl4965_hw_set_hw_params,
4964         .txq_update_byte_cnt_tbl = iwl4965_txq_update_byte_cnt_tbl,
4965         .hw_nic_init = iwl4965_hw_nic_init,
4966         .is_valid_rtc_data_addr = iwl4965_hw_valid_rtc_data_addr,
4967         .alive_notify = iwl4965_alive_notify,
4968         .load_ucode = iwl4965_load_bsm,
4969         .eeprom_ops = {
4970                 .verify_signature  = iwlcore_eeprom_verify_signature,
4971                 .acquire_semaphore = iwlcore_eeprom_acquire_semaphore,
4972                 .release_semaphore = iwlcore_eeprom_release_semaphore,
4973         },
4974         .radio_kill_sw = iwl4965_radio_kill_sw,
4975 };
4976
4977 static struct iwl_ops iwl4965_ops = {
4978         .lib = &iwl4965_lib,
4979         .hcmd = &iwl4965_hcmd,
4980         .utils = &iwl4965_hcmd_utils,
4981 };
4982
4983 struct iwl_cfg iwl4965_agn_cfg = {
4984         .name = "4965AGN",
4985         .fw_name = "iwlwifi-4965" IWL4965_UCODE_API ".ucode",
4986         .sku = IWL_SKU_A|IWL_SKU_G|IWL_SKU_N,
4987         .ops = &iwl4965_ops,
4988         .mod_params = &iwl4965_mod_params,
4989 };
4990
4991 module_param_named(antenna, iwl4965_mod_params.antenna, int, 0444);
4992 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
4993 module_param_named(disable, iwl4965_mod_params.disable, int, 0444);
4994 MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
4995 module_param_named(swcrypto, iwl4965_mod_params.sw_crypto, int, 0444);
4996 MODULE_PARM_DESC(swcrypto, "using crypto in software (default 0 [hardware])\n");
4997 module_param_named(debug, iwl4965_mod_params.debug, int, 0444);
4998 MODULE_PARM_DESC(debug, "debug output mask");
4999 module_param_named(
5000         disable_hw_scan, iwl4965_mod_params.disable_hw_scan, int, 0444);
5001 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
5002
5003 module_param_named(queues_num, iwl4965_mod_params.num_of_queues, int, 0444);
5004 MODULE_PARM_DESC(queues_num, "number of hw queues.");
5005
5006 /* QoS */
5007 module_param_named(qos_enable, iwl4965_mod_params.enable_qos, int, 0444);
5008 MODULE_PARM_DESC(qos_enable, "enable all QoS functionality");
5009 module_param_named(amsdu_size_8K, iwl4965_mod_params.amsdu_size_8K, int, 0444);
5010 MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size");
5011