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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2008 Intel Corporation. All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of version 2 of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  17  *
  18  * The full GNU General Public License is included in this distribution in the
  19  * file called LICENSE.
  20  *
  21  * Contact Information:
  22  * James P. Ketrenos <ipw2100-admin@linux.intel.com>
  23  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  24  *
  25  *****************************************************************************/
  26
  27 #include <linux/kernel.h>
  28 #include <linux/module.h>
  29 #include <linux/version.h>
  30 #include <linux/init.h>
  31 #include <linux/pci.h>
  32 #include <linux/dma-mapping.h>
  33 #include <linux/delay.h>
  34 #include <linux/skbuff.h>
  35 #include <linux/netdevice.h>
  36 #include <linux/wireless.h>
  37 #include <net/mac80211.h>
  38 #include <linux/etherdevice.h>
  39 #include <asm/unaligned.h>
  40
  41 #include "iwl-eeprom.h"
  42 #include "iwl-core.h"
  43 #include "iwl-4965.h"
  44 #include "iwl-io.h"
  45 #include "iwl-helpers.h"
  46
  47 /* module parameters */
  48 static struct iwl_mod_params iwl4965_mod_params = {
  49         .num_of_queues = IWL_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 static int iwl4965_init_drv(struct iwl_priv *priv)
 118 {
 119         int ret;
 120         int i;
 121
 122         priv->antenna = (enum iwl4965_antenna)priv->cfg->mod_params->antenna;
 123         priv->retry_rate = 1;
 124         priv->ibss_beacon = NULL;
 125
 126         spin_lock_init(&priv->lock);
 127         spin_lock_init(&priv->power_data.lock);
 128         spin_lock_init(&priv->sta_lock);
 129         spin_lock_init(&priv->hcmd_lock);
 130         spin_lock_init(&priv->lq_mngr.lock);
 131
 132         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++)
 133                 INIT_LIST_HEAD(&priv->ibss_mac_hash[i]);
 134
 135         INIT_LIST_HEAD(&priv->free_frames);
 136
 137         mutex_init(&priv->mutex);
 138
 139         /* Clear the driver's (not device's) station table */
 140         iwlcore_clear_stations_table(priv);
 141
 142         priv->data_retry_limit = -1;
 143         priv->ieee_channels = NULL;
 144         priv->ieee_rates = NULL;
 145         priv->band = IEEE80211_BAND_2GHZ;
 146
 147         priv->iw_mode = IEEE80211_IF_TYPE_STA;
 148
 149         priv->use_ant_b_for_management_frame = 1; /* start with ant B */
 150         priv->valid_antenna = 0x7;      /* assume all 3 connected */
 151         priv->ps_mode = IWL_MIMO_PS_NONE;
 152
 153         /* Choose which receivers/antennas to use */
 154         iwl4965_set_rxon_chain(priv);
 155
 156         iwlcore_reset_qos(priv);
 157
 158         priv->qos_data.qos_active = 0;
 159         priv->qos_data.qos_cap.val = 0;
 160
 161         iwlcore_set_rxon_channel(priv, IEEE80211_BAND_2GHZ, 6);
 162
 163         priv->rates_mask = IWL_RATES_MASK;
 164         /* If power management is turned on, default to AC mode */
 165         priv->power_mode = IWL_POWER_AC;
 166         priv->user_txpower_limit = IWL_DEFAULT_TX_POWER;
 167
 168         ret = iwl_init_channel_map(priv);
 169         if (ret) {
 170                 IWL_ERROR("initializing regulatory failed: %d\n", ret);
 171                 goto err;
 172         }
 173
 174         ret = iwl4965_init_geos(priv);
 175         if (ret) {
 176                 IWL_ERROR("initializing geos failed: %d\n", ret);
 177                 goto err_free_channel_map;
 178         }
 179
 180         iwl4965_rate_control_register(priv->hw);
 181         ret = ieee80211_register_hw(priv->hw);
 182         if (ret) {
 183                 IWL_ERROR("Failed to register network device (error %d)\n",
 184                                 ret);
 185                 goto err_free_geos;
 186         }
 187
 188         priv->hw->conf.beacon_int = 100;
 189         priv->mac80211_registered = 1;
 190
 191         return 0;
 192
 193 err_free_geos:
 194         iwl4965_free_geos(priv);
 195 err_free_channel_map:
 196         iwl_free_channel_map(priv);
 197 err:
 198         return ret;
 199 }
 200
 201 static int is_fat_channel(__le32 rxon_flags)
 202 {
 203         return (rxon_flags & RXON_FLG_CHANNEL_MODE_PURE_40_MSK) ||
 204                 (rxon_flags & RXON_FLG_CHANNEL_MODE_MIXED_MSK);
 205 }
 206
 207 static u8 is_single_stream(struct iwl_priv *priv)
 208 {
 209 #ifdef CONFIG_IWL4965_HT
 210         if (!priv->current_ht_config.is_ht ||
 211             (priv->current_ht_config.supp_mcs_set[1] == 0) ||
 212             (priv->ps_mode == IWL_MIMO_PS_STATIC))
 213                 return 1;
 214 #else
 215         return 1;
 216 #endif  /*CONFIG_IWL4965_HT */
 217         return 0;
 218 }
 219
 220 int iwl4965_hwrate_to_plcp_idx(u32 rate_n_flags)
 221 {
 222         int idx = 0;
 223
 224         /* 4965 HT rate format */
 225         if (rate_n_flags & RATE_MCS_HT_MSK) {
 226                 idx = (rate_n_flags & 0xff);
 227
 228                 if (idx >= IWL_RATE_MIMO_6M_PLCP)
 229                         idx = idx - IWL_RATE_MIMO_6M_PLCP;
 230
 231                 idx += IWL_FIRST_OFDM_RATE;
 232                 /* skip 9M not supported in ht*/
 233                 if (idx >= IWL_RATE_9M_INDEX)
 234                         idx += 1;
 235                 if ((idx >= IWL_FIRST_OFDM_RATE) && (idx <= IWL_LAST_OFDM_RATE))
 236                         return idx;
 237
 238         /* 4965 legacy rate format, search for match in table */
 239         } else {
 240                 for (idx = 0; idx < ARRAY_SIZE(iwl4965_rates); idx++)
 241                         if (iwl4965_rates[idx].plcp == (rate_n_flags & 0xFF))
 242                                 return idx;
 243         }
 244
 245         return -1;
 246 }
 247
 248 /**
 249  * translate ucode response to mac80211 tx status control values
 250  */
 251 void iwl4965_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
 252                                   struct ieee80211_tx_control *control)
 253 {
 254         int rate_index;
 255
 256         control->antenna_sel_tx =
 257                 ((rate_n_flags & RATE_MCS_ANT_AB_MSK) >> RATE_MCS_ANT_A_POS);
 258         if (rate_n_flags & RATE_MCS_HT_MSK)
 259                 control->flags |= IEEE80211_TXCTL_OFDM_HT;
 260         if (rate_n_flags & RATE_MCS_GF_MSK)
 261                 control->flags |= IEEE80211_TXCTL_GREEN_FIELD;
 262         if (rate_n_flags & RATE_MCS_FAT_MSK)
 263                 control->flags |= IEEE80211_TXCTL_40_MHZ_WIDTH;
 264         if (rate_n_flags & RATE_MCS_DUP_MSK)
 265                 control->flags |= IEEE80211_TXCTL_DUP_DATA;
 266         if (rate_n_flags & RATE_MCS_SGI_MSK)
 267                 control->flags |= IEEE80211_TXCTL_SHORT_GI;
 268         /* since iwl4965_hwrate_to_plcp_idx is band indifferent, we always use
 269          * IEEE80211_BAND_2GHZ band as it contains all the rates */
 270         rate_index = iwl4965_hwrate_to_plcp_idx(rate_n_flags);
 271         if (rate_index == -1)
 272                 control->tx_rate = NULL;
 273         else
 274                 control->tx_rate =
 275                         &priv->bands[IEEE80211_BAND_2GHZ].bitrates[rate_index];
 276 }
 277
 278 /*
 279  * Determine how many receiver/antenna chains to use.
 280  * More provides better reception via diversity.  Fewer saves power.
 281  * MIMO (dual stream) requires at least 2, but works better with 3.
 282  * This does not determine *which* chains to use, just how many.
 283  */
 284 static int iwl4965_get_rx_chain_counter(struct iwl_priv *priv,
 285                                         u8 *idle_state, u8 *rx_state)
 286 {
 287         u8 is_single = is_single_stream(priv);
 288         u8 is_cam = test_bit(STATUS_POWER_PMI, &priv->status) ? 0 : 1;
 289
 290         /* # of Rx chains to use when expecting MIMO. */
 291         if (is_single || (!is_cam && (priv->ps_mode == IWL_MIMO_PS_STATIC)))
 292                 *rx_state = 2;
 293         else
 294                 *rx_state = 3;
 295
 296         /* # Rx chains when idling and maybe trying to save power */
 297         switch (priv->ps_mode) {
 298         case IWL_MIMO_PS_STATIC:
 299         case IWL_MIMO_PS_DYNAMIC:
 300                 *idle_state = (is_cam) ? 2 : 1;
 301                 break;
 302         case IWL_MIMO_PS_NONE:
 303                 *idle_state = (is_cam) ? *rx_state : 1;
 304                 break;
 305         default:
 306                 *idle_state = 1;
 307                 break;
 308         }
 309
 310         return 0;
 311 }
 312
 313 int iwl4965_hw_rxq_stop(struct iwl_priv *priv)
 314 {
 315         int rc;
 316         unsigned long flags;
 317
 318         spin_lock_irqsave(&priv->lock, flags);
 319         rc = iwl_grab_nic_access(priv);
 320         if (rc) {
 321                 spin_unlock_irqrestore(&priv->lock, flags);
 322                 return rc;
 323         }
 324
 325         /* stop Rx DMA */
 326         iwl_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0);
 327         rc = iwl_poll_direct_bit(priv, FH_MEM_RSSR_RX_STATUS_REG,
 328                                      (1 << 24), 1000);
 329         if (rc < 0)
 330                 IWL_ERROR("Can't stop Rx DMA.\n");
 331
 332         iwl_release_nic_access(priv);
 333         spin_unlock_irqrestore(&priv->lock, flags);
 334
 335         return 0;
 336 }
 337
 338 u8 iwl4965_hw_find_station(struct iwl_priv *priv, const u8 *addr)
 339 {
 340         int i;
 341         int start = 0;
 342         int ret = IWL_INVALID_STATION;
 343         unsigned long flags;
 344         DECLARE_MAC_BUF(mac);
 345
 346         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) ||
 347             (priv->iw_mode == IEEE80211_IF_TYPE_AP))
 348                 start = IWL_STA_ID;
 349
 350         if (is_broadcast_ether_addr(addr))
 351                 return priv->hw_setting.bcast_sta_id;
 352
 353         spin_lock_irqsave(&priv->sta_lock, flags);
 354         for (i = start; i < priv->hw_setting.max_stations; i++)
 355                 if ((priv->stations[i].used) &&
 356                     (!compare_ether_addr
 357                      (priv->stations[i].sta.sta.addr, addr))) {
 358                         ret = i;
 359                         goto out;
 360                 }
 361
 362         IWL_DEBUG_ASSOC_LIMIT("can not find STA %s total %d\n",
 363                         print_mac(mac, addr), priv->num_stations);
 364
 365  out:
 366         spin_unlock_irqrestore(&priv->sta_lock, flags);
 367         return ret;
 368 }
 369
 370 static int iwl4965_nic_set_pwr_src(struct iwl_priv *priv, int pwr_max)
 371 {
 372         int ret;
 373         unsigned long flags;
 374
 375         spin_lock_irqsave(&priv->lock, flags);
 376         ret = iwl_grab_nic_access(priv);
 377         if (ret) {
 378                 spin_unlock_irqrestore(&priv->lock, flags);
 379                 return ret;
 380         }
 381
 382         if (!pwr_max) {
 383                 u32 val;
 384
 385                 ret = pci_read_config_dword(priv->pci_dev, PCI_POWER_SOURCE,
 386                                            &val);
 387
 388                 if (val & PCI_CFG_PMC_PME_FROM_D3COLD_SUPPORT)
 389                         iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 390                                 APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
 391                                 ~APMG_PS_CTRL_MSK_PWR_SRC);
 392         } else
 393                 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 394                         APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
 395                         ~APMG_PS_CTRL_MSK_PWR_SRC);
 396
 397         iwl_release_nic_access(priv);
 398         spin_unlock_irqrestore(&priv->lock, flags);
 399
 400         return ret;
 401 }
 402
 403 static int iwl4965_rx_init(struct iwl_priv *priv, struct iwl4965_rx_queue *rxq)
 404 {
 405         int rc;
 406         unsigned long flags;
 407         unsigned int rb_size;
 408
 409         spin_lock_irqsave(&priv->lock, flags);
 410         rc = iwl_grab_nic_access(priv);
 411         if (rc) {
 412                 spin_unlock_irqrestore(&priv->lock, flags);
 413                 return rc;
 414         }
 415
 416         if (priv->cfg->mod_params->amsdu_size_8K)
 417                 rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_8K;
 418         else
 419                 rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K;
 420
 421         /* Stop Rx DMA */
 422         iwl_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0);
 423
 424         /* Reset driver's Rx queue write index */
 425         iwl_write_direct32(priv, FH_RSCSR_CHNL0_RBDCB_WPTR_REG, 0);
 426
 427         /* Tell device where to find RBD circular buffer in DRAM */
 428         iwl_write_direct32(priv, FH_RSCSR_CHNL0_RBDCB_BASE_REG,
 429                            rxq->dma_addr >> 8);
 430
 431         /* Tell device where in DRAM to update its Rx status */
 432         iwl_write_direct32(priv, FH_RSCSR_CHNL0_STTS_WPTR_REG,
 433                            (priv->hw_setting.shared_phys +
 434                                 offsetof(struct iwl4965_shared, val0)) >> 4);
 435
 436         /* Enable Rx DMA, enable host interrupt, Rx buffer size 4k, 256 RBDs */
 437         iwl_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG,
 438                            FH_RCSR_RX_CONFIG_CHNL_EN_ENABLE_VAL |
 439                            FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_INT_HOST_VAL |
 440                            rb_size |
 441                              /*0x10 << 4 | */
 442                            (RX_QUEUE_SIZE_LOG <<
 443                               FH_RCSR_RX_CONFIG_RBDCB_SIZE_BITSHIFT));
 444
 445         /*
 446          * iwl_write32(priv,CSR_INT_COAL_REG,0);
 447          */
 448
 449         iwl_release_nic_access(priv);
 450         spin_unlock_irqrestore(&priv->lock, flags);
 451
 452         return 0;
 453 }
 454
 455 /* Tell 4965 where to find the "keep warm" buffer */
 456 static int iwl4965_kw_init(struct iwl_priv *priv)
 457 {
 458         unsigned long flags;
 459         int rc;
 460
 461         spin_lock_irqsave(&priv->lock, flags);
 462         rc = iwl_grab_nic_access(priv);
 463         if (rc)
 464                 goto out;
 465
 466         iwl_write_direct32(priv, IWL_FH_KW_MEM_ADDR_REG,
 467                              priv->kw.dma_addr >> 4);
 468         iwl_release_nic_access(priv);
 469 out:
 470         spin_unlock_irqrestore(&priv->lock, flags);
 471         return rc;
 472 }
 473
 474 static int iwl4965_kw_alloc(struct iwl_priv *priv)
 475 {
 476         struct pci_dev *dev = priv->pci_dev;
 477         struct iwl4965_kw *kw = &priv->kw;
 478
 479         kw->size = IWL4965_KW_SIZE;     /* TBW need set somewhere else */
 480         kw->v_addr = pci_alloc_consistent(dev, kw->size, &kw->dma_addr);
 481         if (!kw->v_addr)
 482                 return -ENOMEM;
 483
 484         return 0;
 485 }
 486
 487 /**
 488  * iwl4965_kw_free - Free the "keep warm" buffer
 489  */
 490 static void iwl4965_kw_free(struct iwl_priv *priv)
 491 {
 492         struct pci_dev *dev = priv->pci_dev;
 493         struct iwl4965_kw *kw = &priv->kw;
 494
 495         if (kw->v_addr) {
 496                 pci_free_consistent(dev, kw->size, kw->v_addr, kw->dma_addr);
 497                 memset(kw, 0, sizeof(*kw));
 498         }
 499 }
 500
 501 /**
 502  * iwl4965_txq_ctx_reset - Reset TX queue context
 503  * Destroys all DMA structures and initialise them again
 504  *
 505  * @param priv
 506  * @return error code
 507  */
 508 static int iwl4965_txq_ctx_reset(struct iwl_priv *priv)
 509 {
 510         int rc = 0;
 511         int txq_id, slots_num;
 512         unsigned long flags;
 513
 514         iwl4965_kw_free(priv);
 515
 516         /* Free all tx/cmd queues and keep-warm buffer */
 517         iwl4965_hw_txq_ctx_free(priv);
 518
 519         /* Alloc keep-warm buffer */
 520         rc = iwl4965_kw_alloc(priv);
 521         if (rc) {
 522                 IWL_ERROR("Keep Warm allocation failed");
 523                 goto error_kw;
 524         }
 525
 526         spin_lock_irqsave(&priv->lock, flags);
 527
 528         rc = iwl_grab_nic_access(priv);
 529         if (unlikely(rc)) {
 530                 IWL_ERROR("TX reset failed");
 531                 spin_unlock_irqrestore(&priv->lock, flags);
 532                 goto error_reset;
 533         }
 534
 535         /* Turn off all Tx DMA channels */
 536         iwl_write_prph(priv, KDR_SCD_TXFACT, 0);
 537         iwl_release_nic_access(priv);
 538         spin_unlock_irqrestore(&priv->lock, flags);
 539
 540         /* Tell 4965 where to find the keep-warm buffer */
 541         rc = iwl4965_kw_init(priv);
 542         if (rc) {
 543                 IWL_ERROR("kw_init failed\n");
 544                 goto error_reset;
 545         }
 546
 547         /* Alloc and init all (default 16) Tx queues,
 548          * including the command queue (#4) */
 549         for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++) {
 550                 slots_num = (txq_id == IWL_CMD_QUEUE_NUM) ?
 551                                         TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS;
 552                 rc = iwl4965_tx_queue_init(priv, &priv->txq[txq_id], slots_num,
 553                                        txq_id);
 554                 if (rc) {
 555                         IWL_ERROR("Tx %d queue init failed\n", txq_id);
 556                         goto error;
 557                 }
 558         }
 559
 560         return rc;
 561
 562  error:
 563         iwl4965_hw_txq_ctx_free(priv);
 564  error_reset:
 565         iwl4965_kw_free(priv);
 566  error_kw:
 567         return rc;
 568 }
 569
 570 int iwl4965_hw_nic_init(struct iwl_priv *priv)
 571 {
 572         int rc;
 573         unsigned long flags;
 574         struct iwl4965_rx_queue *rxq = &priv->rxq;
 575         u8 rev_id;
 576         u32 val;
 577         u8 val_link;
 578
 579         iwl4965_power_init_handle(priv);
 580
 581         /* nic_init */
 582         spin_lock_irqsave(&priv->lock, flags);
 583
 584         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
 585                     CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
 586
 587         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 588         rc = iwl_poll_bit(priv, CSR_GP_CNTRL,
 589                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
 590                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
 591         if (rc < 0) {
 592                 spin_unlock_irqrestore(&priv->lock, flags);
 593                 IWL_DEBUG_INFO("Failed to init the card\n");
 594                 return rc;
 595         }
 596
 597         rc = iwl_grab_nic_access(priv);
 598         if (rc) {
 599                 spin_unlock_irqrestore(&priv->lock, flags);
 600                 return rc;
 601         }
 602
 603         iwl_read_prph(priv, APMG_CLK_CTRL_REG);
 604
 605         iwl_write_prph(priv, APMG_CLK_CTRL_REG,
 606                         APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
 607         iwl_read_prph(priv, APMG_CLK_CTRL_REG);
 608
 609         udelay(20);
 610
 611         iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
 612                                 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
 613
 614         iwl_release_nic_access(priv);
 615         iwl_write32(priv, CSR_INT_COALESCING, 512 / 32);
 616         spin_unlock_irqrestore(&priv->lock, flags);
 617
 618         /* Determine HW type */
 619         rc = pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &rev_id);
 620         if (rc)
 621                 return rc;
 622
 623         IWL_DEBUG_INFO("HW Revision ID = 0x%X\n", rev_id);
 624
 625         iwl4965_nic_set_pwr_src(priv, 1);
 626         spin_lock_irqsave(&priv->lock, flags);
 627
 628         if ((rev_id & 0x80) == 0x80 && (rev_id & 0x7f) < 8) {
 629                 pci_read_config_dword(priv->pci_dev, PCI_REG_WUM8, &val);
 630                 /* Enable No Snoop field */
 631                 pci_write_config_dword(priv->pci_dev, PCI_REG_WUM8,
 632                                        val & ~(1 << 11));
 633         }
 634
 635         spin_unlock_irqrestore(&priv->lock, flags);
 636
 637         if (priv->eeprom.calib_version < EEPROM_TX_POWER_VERSION_NEW) {
 638                 IWL_ERROR("Older EEPROM detected!  Aborting.\n");
 639                 return -EINVAL;
 640         }
 641
 642         pci_read_config_byte(priv->pci_dev, PCI_LINK_CTRL, &val_link);
 643
 644         /* disable L1 entry -- workaround for pre-B1 */
 645         pci_write_config_byte(priv->pci_dev, PCI_LINK_CTRL, val_link & ~0x02);
 646
 647         spin_lock_irqsave(&priv->lock, flags);
 648
 649         /* set CSR_HW_CONFIG_REG for uCode use */
 650
 651         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
 652                     CSR49_HW_IF_CONFIG_REG_BIT_4965_R |
 653                     CSR49_HW_IF_CONFIG_REG_BIT_RADIO_SI |
 654                     CSR49_HW_IF_CONFIG_REG_BIT_MAC_SI);
 655
 656         rc = iwl_grab_nic_access(priv);
 657         if (rc < 0) {
 658                 spin_unlock_irqrestore(&priv->lock, flags);
 659                 IWL_DEBUG_INFO("Failed to init the card\n");
 660                 return rc;
 661         }
 662
 663         iwl_read_prph(priv, APMG_PS_CTRL_REG);
 664         iwl_set_bits_prph(priv, APMG_PS_CTRL_REG, APMG_PS_CTRL_VAL_RESET_REQ);
 665         udelay(5);
 666         iwl_clear_bits_prph(priv, APMG_PS_CTRL_REG, APMG_PS_CTRL_VAL_RESET_REQ);
 667
 668         iwl_release_nic_access(priv);
 669         spin_unlock_irqrestore(&priv->lock, flags);
 670
 671         iwl4965_hw_card_show_info(priv);
 672
 673         /* end nic_init */
 674
 675         /* Allocate the RX queue, or reset if it is already allocated */
 676         if (!rxq->bd) {
 677                 rc = iwl4965_rx_queue_alloc(priv);
 678                 if (rc) {
 679                         IWL_ERROR("Unable to initialize Rx queue\n");
 680                         return -ENOMEM;
 681                 }
 682         } else
 683                 iwl4965_rx_queue_reset(priv, rxq);
 684
 685         iwl4965_rx_replenish(priv);
 686
 687         iwl4965_rx_init(priv, rxq);
 688
 689         spin_lock_irqsave(&priv->lock, flags);
 690
 691         rxq->need_update = 1;
 692         iwl4965_rx_queue_update_write_ptr(priv, rxq);
 693
 694         spin_unlock_irqrestore(&priv->lock, flags);
 695
 696         /* Allocate and init all Tx and Command queues */
 697         rc = iwl4965_txq_ctx_reset(priv);
 698         if (rc)
 699                 return rc;
 700
 701         if (priv->eeprom.sku_cap & EEPROM_SKU_CAP_SW_RF_KILL_ENABLE)
 702                 IWL_DEBUG_RF_KILL("SW RF KILL supported in EEPROM.\n");
 703
 704         if (priv->eeprom.sku_cap & EEPROM_SKU_CAP_HW_RF_KILL_ENABLE)
 705                 IWL_DEBUG_RF_KILL("HW RF KILL supported in EEPROM.\n");
 706
 707         set_bit(STATUS_INIT, &priv->status);
 708
 709         return 0;
 710 }
 711
 712 int iwl4965_hw_nic_stop_master(struct iwl_priv *priv)
 713 {
 714         int rc = 0;
 715         u32 reg_val;
 716         unsigned long flags;
 717
 718         spin_lock_irqsave(&priv->lock, flags);
 719
 720         /* set stop master bit */
 721         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
 722
 723         reg_val = iwl_read32(priv, CSR_GP_CNTRL);
 724
 725         if (CSR_GP_CNTRL_REG_FLAG_MAC_POWER_SAVE ==
 726             (reg_val & CSR_GP_CNTRL_REG_MSK_POWER_SAVE_TYPE))
 727                 IWL_DEBUG_INFO("Card in power save, master is already "
 728                                "stopped\n");
 729         else {
 730                 rc = iwl_poll_bit(priv, CSR_RESET,
 731                                   CSR_RESET_REG_FLAG_MASTER_DISABLED,
 732                                   CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
 733                 if (rc < 0) {
 734                         spin_unlock_irqrestore(&priv->lock, flags);
 735                         return rc;
 736                 }
 737         }
 738
 739         spin_unlock_irqrestore(&priv->lock, flags);
 740         IWL_DEBUG_INFO("stop master\n");
 741
 742         return rc;
 743 }
 744
 745 /**
 746  * iwl4965_hw_txq_ctx_stop - Stop all Tx DMA channels, free Tx queue memory
 747  */
 748 void iwl4965_hw_txq_ctx_stop(struct iwl_priv *priv)
 749 {
 750
 751         int txq_id;
 752         unsigned long flags;
 753
 754         /* Stop each Tx DMA channel, and wait for it to be idle */
 755         for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++) {
 756                 spin_lock_irqsave(&priv->lock, flags);
 757                 if (iwl_grab_nic_access(priv)) {
 758                         spin_unlock_irqrestore(&priv->lock, flags);
 759                         continue;
 760                 }
 761
 762                 iwl_write_direct32(priv,
 763                                    IWL_FH_TCSR_CHNL_TX_CONFIG_REG(txq_id), 0x0);
 764                 iwl_poll_direct_bit(priv, IWL_FH_TSSR_TX_STATUS_REG,
 765                                     IWL_FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE
 766                                     (txq_id), 200);
 767                 iwl_release_nic_access(priv);
 768                 spin_unlock_irqrestore(&priv->lock, flags);
 769         }
 770
 771         /* Deallocate memory for all Tx queues */
 772         iwl4965_hw_txq_ctx_free(priv);
 773 }
 774
 775 int iwl4965_hw_nic_reset(struct iwl_priv *priv)
 776 {
 777         int rc = 0;
 778         unsigned long flags;
 779
 780         iwl4965_hw_nic_stop_master(priv);
 781
 782         spin_lock_irqsave(&priv->lock, flags);
 783
 784         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
 785
 786         udelay(10);
 787
 788         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 789         rc = iwl_poll_bit(priv, CSR_RESET,
 790                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
 791                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25);
 792
 793         udelay(10);
 794
 795         rc = iwl_grab_nic_access(priv);
 796         if (!rc) {
 797                 iwl_write_prph(priv, APMG_CLK_EN_REG,
 798                                 APMG_CLK_VAL_DMA_CLK_RQT |
 799                                 APMG_CLK_VAL_BSM_CLK_RQT);
 800
 801                 udelay(10);
 802
 803                 iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
 804                                         APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
 805
 806                 iwl_release_nic_access(priv);
 807         }
 808
 809         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
 810         wake_up_interruptible(&priv->wait_command_queue);
 811
 812         spin_unlock_irqrestore(&priv->lock, flags);
 813
 814         return rc;
 815
 816 }
 817
 818 #define REG_RECALIB_PERIOD (60)
 819
 820 /**
 821  * iwl4965_bg_statistics_periodic - Timer callback to queue statistics
 822  *
 823  * This callback is provided in order to queue the statistics_work
 824  * in work_queue context (v. softirq)
 825  *
 826  * This timer function is continually reset to execute within
 827  * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
 828  * was received.  We need to ensure we receive the statistics in order
 829  * to update the temperature used for calibrating the TXPOWER.  However,
 830  * we can't send the statistics command from softirq context (which
 831  * is the context which timers run at) so we have to queue off the
 832  * statistics_work to actually send the command to the hardware.
 833  */
 834 static void iwl4965_bg_statistics_periodic(unsigned long data)
 835 {
 836         struct iwl_priv *priv = (struct iwl_priv *)data;
 837
 838         queue_work(priv->workqueue, &priv->statistics_work);
 839 }
 840
 841 /**
 842  * iwl4965_bg_statistics_work - Send the statistics request to the hardware.
 843  *
 844  * This is queued by iwl4965_bg_statistics_periodic.
 845  */
 846 static void iwl4965_bg_statistics_work(struct work_struct *work)
 847 {
 848         struct iwl_priv *priv = container_of(work, struct iwl_priv,
 849                                              statistics_work);
 850
 851         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 852                 return;
 853
 854         mutex_lock(&priv->mutex);
 855         iwl4965_send_statistics_request(priv);
 856         mutex_unlock(&priv->mutex);
 857 }
 858
 859 #define CT_LIMIT_CONST          259
 860 #define TM_CT_KILL_THRESHOLD    110
 861
 862 void iwl4965_rf_kill_ct_config(struct iwl_priv *priv)
 863 {
 864         struct iwl4965_ct_kill_config cmd;
 865         u32 R1, R2, R3;
 866         u32 temp_th;
 867         u32 crit_temperature;
 868         unsigned long flags;
 869         int ret = 0;
 870
 871         spin_lock_irqsave(&priv->lock, flags);
 872         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
 873                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
 874         spin_unlock_irqrestore(&priv->lock, flags);
 875
 876         if (priv->statistics.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK) {
 877                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[1]);
 878                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[1]);
 879                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[1]);
 880         } else {
 881                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[0]);
 882                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[0]);
 883                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[0]);
 884         }
 885
 886         temp_th = CELSIUS_TO_KELVIN(TM_CT_KILL_THRESHOLD);
 887
 888         crit_temperature = ((temp_th * (R3-R1))/CT_LIMIT_CONST) + R2;
 889         cmd.critical_temperature_R =  cpu_to_le32(crit_temperature);
 890         ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
 891                                sizeof(cmd), &cmd);
 892         if (ret)
 893                 IWL_ERROR("REPLY_CT_KILL_CONFIG_CMD failed\n");
 894         else
 895                 IWL_DEBUG_INFO("REPLY_CT_KILL_CONFIG_CMD succeeded\n");
 896 }
 897
 898 #ifdef CONFIG_IWL4965_SENSITIVITY
 899
 900 /* "false alarms" are signals that our DSP tries to lock onto,
 901  *   but then determines that they are either noise, or transmissions
 902  *   from a distant wireless network (also "noise", really) that get
 903  *   "stepped on" by stronger transmissions within our own network.
 904  * This algorithm attempts to set a sensitivity level that is high
 905  *   enough to receive all of our own network traffic, but not so
 906  *   high that our DSP gets too busy trying to lock onto non-network
 907  *   activity/noise. */
 908 static int iwl4965_sens_energy_cck(struct iwl_priv *priv,
 909                                    u32 norm_fa,
 910                                    u32 rx_enable_time,
 911                                    struct statistics_general_data *rx_info)
 912 {
 913         u32 max_nrg_cck = 0;
 914         int i = 0;
 915         u8 max_silence_rssi = 0;
 916         u32 silence_ref = 0;
 917         u8 silence_rssi_a = 0;
 918         u8 silence_rssi_b = 0;
 919         u8 silence_rssi_c = 0;
 920         u32 val;
 921
 922         /* "false_alarms" values below are cross-multiplications to assess the
 923          *   numbers of false alarms within the measured period of actual Rx
 924          *   (Rx is off when we're txing), vs the min/max expected false alarms
 925          *   (some should be expected if rx is sensitive enough) in a
 926          *   hypothetical listening period of 200 time units (TU), 204.8 msec:
 927          *
 928          * MIN_FA/fixed-time < false_alarms/actual-rx-time < MAX_FA/beacon-time
 929          *
 930          * */
 931         u32 false_alarms = norm_fa * 200 * 1024;
 932         u32 max_false_alarms = MAX_FA_CCK * rx_enable_time;
 933         u32 min_false_alarms = MIN_FA_CCK * rx_enable_time;
 934         struct iwl4965_sensitivity_data *data = NULL;
 935
 936         data = &(priv->sensitivity_data);
 937
 938         data->nrg_auto_corr_silence_diff = 0;
 939
 940         /* Find max silence rssi among all 3 receivers.
 941          * This is background noise, which may include transmissions from other
 942          *    networks, measured during silence before our network's beacon */
 943         silence_rssi_a = (u8)((rx_info->beacon_silence_rssi_a &
 944                             ALL_BAND_FILTER) >> 8);
 945         silence_rssi_b = (u8)((rx_info->beacon_silence_rssi_b &
 946                             ALL_BAND_FILTER) >> 8);
 947         silence_rssi_c = (u8)((rx_info->beacon_silence_rssi_c &
 948                             ALL_BAND_FILTER) >> 8);
 949
 950         val = max(silence_rssi_b, silence_rssi_c);
 951         max_silence_rssi = max(silence_rssi_a, (u8) val);
 952
 953         /* Store silence rssi in 20-beacon history table */
 954         data->nrg_silence_rssi[data->nrg_silence_idx] = max_silence_rssi;
 955         data->nrg_silence_idx++;
 956         if (data->nrg_silence_idx >= NRG_NUM_PREV_STAT_L)
 957                 data->nrg_silence_idx = 0;
 958
 959         /* Find max silence rssi across 20 beacon history */
 960         for (i = 0; i < NRG_NUM_PREV_STAT_L; i++) {
 961                 val = data->nrg_silence_rssi[i];
 962                 silence_ref = max(silence_ref, val);
 963         }
 964         IWL_DEBUG_CALIB("silence a %u, b %u, c %u, 20-bcn max %u\n",
 965                         silence_rssi_a, silence_rssi_b, silence_rssi_c,
 966                         silence_ref);
 967
 968         /* Find max rx energy (min value!) among all 3 receivers,
 969          *   measured during beacon frame.
 970          * Save it in 10-beacon history table. */
 971         i = data->nrg_energy_idx;
 972         val = min(rx_info->beacon_energy_b, rx_info->beacon_energy_c);
 973         data->nrg_value[i] = min(rx_info->beacon_energy_a, val);
 974
 975         data->nrg_energy_idx++;
 976         if (data->nrg_energy_idx >= 10)
 977                 data->nrg_energy_idx = 0;
 978
 979         /* Find min rx energy (max value) across 10 beacon history.
 980          * This is the minimum signal level that we want to receive well.
 981          * Add backoff (margin so we don't miss slightly lower energy frames).
 982          * This establishes an upper bound (min value) for energy threshold. */
 983         max_nrg_cck = data->nrg_value[0];
 984         for (i = 1; i < 10; i++)
 985                 max_nrg_cck = (u32) max(max_nrg_cck, (data->nrg_value[i]));
 986         max_nrg_cck += 6;
 987
 988         IWL_DEBUG_CALIB("rx energy a %u, b %u, c %u, 10-bcn max/min %u\n",
 989                         rx_info->beacon_energy_a, rx_info->beacon_energy_b,
 990                         rx_info->beacon_energy_c, max_nrg_cck - 6);
 991
 992         /* Count number of consecutive beacons with fewer-than-desired
 993          *   false alarms. */
 994         if (false_alarms < min_false_alarms)
 995                 data->num_in_cck_no_fa++;
 996         else
 997                 data->num_in_cck_no_fa = 0;
 998         IWL_DEBUG_CALIB("consecutive bcns with few false alarms = %u\n",
 999                         data->num_in_cck_no_fa);
1000
1001         /* If we got too many false alarms this time, reduce sensitivity */
1002         if (false_alarms > max_false_alarms) {
1003                 IWL_DEBUG_CALIB("norm FA %u > max FA %u\n",
1004                              false_alarms, max_false_alarms);
1005                 IWL_DEBUG_CALIB("... reducing sensitivity\n");
1006                 data->nrg_curr_state = IWL_FA_TOO_MANY;
1007
1008                 if (data->auto_corr_cck > AUTO_CORR_MAX_TH_CCK) {
1009                         /* Store for "fewer than desired" on later beacon */
1010                         data->nrg_silence_ref = silence_ref;
1011
1012                         /* increase energy threshold (reduce nrg value)
1013                          *   to decrease sensitivity */
1014                         if (data->nrg_th_cck > (NRG_MAX_CCK + NRG_STEP_CCK))
1015                                 data->nrg_th_cck = data->nrg_th_cck
1016                                                          - NRG_STEP_CCK;
1017                 }
1018
1019                 /* increase auto_corr values to decrease sensitivity */
1020                 if (data->auto_corr_cck < AUTO_CORR_MAX_TH_CCK)
1021                         data->auto_corr_cck = AUTO_CORR_MAX_TH_CCK + 1;
1022                 else {
1023                         val = data->auto_corr_cck + AUTO_CORR_STEP_CCK;
1024                         data->auto_corr_cck = min((u32)AUTO_CORR_MAX_CCK, val);
1025                 }
1026                 val = data->auto_corr_cck_mrc + AUTO_CORR_STEP_CCK;
1027                 data->auto_corr_cck_mrc = min((u32)AUTO_CORR_MAX_CCK_MRC, val);
1028
1029         /* Else if we got fewer than desired, increase sensitivity */
1030         } else if (false_alarms < min_false_alarms) {
1031                 data->nrg_curr_state = IWL_FA_TOO_FEW;
1032
1033                 /* Compare silence level with silence level for most recent
1034                  *   healthy number or too many false alarms */
1035                 data->nrg_auto_corr_silence_diff = (s32)data->nrg_silence_ref -
1036                                                    (s32)silence_ref;
1037
1038                 IWL_DEBUG_CALIB("norm FA %u < min FA %u, silence diff %d\n",
1039                          false_alarms, min_false_alarms,
1040                          data->nrg_auto_corr_silence_diff);
1041
1042                 /* Increase value to increase sensitivity, but only if:
1043                  * 1a) previous beacon did *not* have *too many* false alarms
1044                  * 1b) AND there's a significant difference in Rx levels
1045                  *      from a previous beacon with too many, or healthy # FAs
1046                  * OR 2) We've seen a lot of beacons (100) with too few
1047                  *       false alarms */
1048                 if ((data->nrg_prev_state != IWL_FA_TOO_MANY) &&
1049                         ((data->nrg_auto_corr_silence_diff > NRG_DIFF) ||
1050                         (data->num_in_cck_no_fa > MAX_NUMBER_CCK_NO_FA))) {
1051
1052                         IWL_DEBUG_CALIB("... increasing sensitivity\n");
1053                         /* Increase nrg value to increase sensitivity */
1054                         val = data->nrg_th_cck + NRG_STEP_CCK;
1055                         data->nrg_th_cck = min((u32)NRG_MIN_CCK, val);
1056
1057                         /* Decrease auto_corr values to increase sensitivity */
1058                         val = data->auto_corr_cck - AUTO_CORR_STEP_CCK;
1059                         data->auto_corr_cck = max((u32)AUTO_CORR_MIN_CCK, val);
1060
1061                         val = data->auto_corr_cck_mrc - AUTO_CORR_STEP_CCK;
1062                         data->auto_corr_cck_mrc =
1063                                          max((u32)AUTO_CORR_MIN_CCK_MRC, val);
1064
1065                 } else
1066                         IWL_DEBUG_CALIB("... but not changing sensitivity\n");
1067
1068         /* Else we got a healthy number of false alarms, keep status quo */
1069         } else {
1070                 IWL_DEBUG_CALIB(" FA in safe zone\n");
1071                 data->nrg_curr_state = IWL_FA_GOOD_RANGE;
1072
1073                 /* Store for use in "fewer than desired" with later beacon */
1074                 data->nrg_silence_ref = silence_ref;
1075
1076                 /* If previous beacon had too many false alarms,
1077                  *   give it some extra margin by reducing sensitivity again
1078                  *   (but don't go below measured energy of desired Rx) */
1079                 if (IWL_FA_TOO_MANY == data->nrg_prev_state) {
1080                         IWL_DEBUG_CALIB("... increasing margin\n");
1081                         data->nrg_th_cck -= NRG_MARGIN;
1082                 }
1083         }
1084
1085         /* Make sure the energy threshold does not go above the measured
1086          * energy of the desired Rx signals (reduced by backoff margin),
1087          * or else we might start missing Rx frames.
1088          * Lower value is higher energy, so we use max()!
1089          */
1090         data->nrg_th_cck = max(max_nrg_cck, data->nrg_th_cck);
1091         IWL_DEBUG_CALIB("new nrg_th_cck %u\n", data->nrg_th_cck);
1092
1093         data->nrg_prev_state = data->nrg_curr_state;
1094
1095         return 0;
1096 }
1097
1098
1099 static int iwl4965_sens_auto_corr_ofdm(struct iwl_priv *priv,
1100                                        u32 norm_fa,
1101                                        u32 rx_enable_time)
1102 {
1103         u32 val;
1104         u32 false_alarms = norm_fa * 200 * 1024;
1105         u32 max_false_alarms = MAX_FA_OFDM * rx_enable_time;
1106         u32 min_false_alarms = MIN_FA_OFDM * rx_enable_time;
1107         struct iwl4965_sensitivity_data *data = NULL;
1108
1109         data = &(priv->sensitivity_data);
1110
1111         /* If we got too many false alarms this time, reduce sensitivity */
1112         if (false_alarms > max_false_alarms) {
1113
1114                 IWL_DEBUG_CALIB("norm FA %u > max FA %u)\n",
1115                              false_alarms, max_false_alarms);
1116
1117                 val = data->auto_corr_ofdm + AUTO_CORR_STEP_OFDM;
1118                 data->auto_corr_ofdm =
1119                                 min((u32)AUTO_CORR_MAX_OFDM, val);
1120
1121                 val = data->auto_corr_ofdm_mrc + AUTO_CORR_STEP_OFDM;
1122                 data->auto_corr_ofdm_mrc =
1123                                 min((u32)AUTO_CORR_MAX_OFDM_MRC, val);
1124
1125                 val = data->auto_corr_ofdm_x1 + AUTO_CORR_STEP_OFDM;
1126                 data->auto_corr_ofdm_x1 =
1127                                 min((u32)AUTO_CORR_MAX_OFDM_X1, val);
1128
1129                 val = data->auto_corr_ofdm_mrc_x1 + AUTO_CORR_STEP_OFDM;
1130                 data->auto_corr_ofdm_mrc_x1 =
1131                                 min((u32)AUTO_CORR_MAX_OFDM_MRC_X1, val);
1132         }
1133
1134         /* Else if we got fewer than desired, increase sensitivity */
1135         else if (false_alarms < min_false_alarms) {
1136
1137                 IWL_DEBUG_CALIB("norm FA %u < min FA %u\n",
1138                              false_alarms, min_false_alarms);
1139
1140                 val = data->auto_corr_ofdm - AUTO_CORR_STEP_OFDM;
1141                 data->auto_corr_ofdm =
1142                                 max((u32)AUTO_CORR_MIN_OFDM, val);
1143
1144                 val = data->auto_corr_ofdm_mrc - AUTO_CORR_STEP_OFDM;
1145                 data->auto_corr_ofdm_mrc =
1146                                 max((u32)AUTO_CORR_MIN_OFDM_MRC, val);
1147
1148                 val = data->auto_corr_ofdm_x1 - AUTO_CORR_STEP_OFDM;
1149                 data->auto_corr_ofdm_x1 =
1150                                 max((u32)AUTO_CORR_MIN_OFDM_X1, val);
1151
1152                 val = data->auto_corr_ofdm_mrc_x1 - AUTO_CORR_STEP_OFDM;
1153                 data->auto_corr_ofdm_mrc_x1 =
1154                                 max((u32)AUTO_CORR_MIN_OFDM_MRC_X1, val);
1155         }
1156
1157         else
1158                 IWL_DEBUG_CALIB("min FA %u < norm FA %u < max FA %u OK\n",
1159                          min_false_alarms, false_alarms, max_false_alarms);
1160
1161         return 0;
1162 }
1163
1164 static int iwl4965_sensitivity_callback(struct iwl_priv *priv,
1165                                     struct iwl_cmd *cmd, struct sk_buff *skb)
1166 {
1167         /* We didn't cache the SKB; let the caller free it */
1168         return 1;
1169 }
1170
1171 /* Prepare a SENSITIVITY_CMD, send to uCode if values have changed */
1172 static int iwl4965_sensitivity_write(struct iwl_priv *priv, u8 flags)
1173 {
1174         struct iwl4965_sensitivity_cmd cmd ;
1175         struct iwl4965_sensitivity_data *data = NULL;
1176         struct iwl_host_cmd cmd_out = {
1177                 .id = SENSITIVITY_CMD,
1178                 .len = sizeof(struct iwl4965_sensitivity_cmd),
1179                 .meta.flags = flags,
1180                 .data = &cmd,
1181         };
1182         int ret;
1183
1184         data = &(priv->sensitivity_data);
1185
1186         memset(&cmd, 0, sizeof(cmd));
1187
1188         cmd.table[HD_AUTO_CORR32_X4_TH_ADD_MIN_INDEX] =
1189                                 cpu_to_le16((u16)data->auto_corr_ofdm);
1190         cmd.table[HD_AUTO_CORR32_X4_TH_ADD_MIN_MRC_INDEX] =
1191                                 cpu_to_le16((u16)data->auto_corr_ofdm_mrc);
1192         cmd.table[HD_AUTO_CORR32_X1_TH_ADD_MIN_INDEX] =
1193                                 cpu_to_le16((u16)data->auto_corr_ofdm_x1);
1194         cmd.table[HD_AUTO_CORR32_X1_TH_ADD_MIN_MRC_INDEX] =
1195                                 cpu_to_le16((u16)data->auto_corr_ofdm_mrc_x1);
1196
1197         cmd.table[HD_AUTO_CORR40_X4_TH_ADD_MIN_INDEX] =
1198                                 cpu_to_le16((u16)data->auto_corr_cck);
1199         cmd.table[HD_AUTO_CORR40_X4_TH_ADD_MIN_MRC_INDEX] =
1200                                 cpu_to_le16((u16)data->auto_corr_cck_mrc);
1201
1202         cmd.table[HD_MIN_ENERGY_CCK_DET_INDEX] =
1203                                 cpu_to_le16((u16)data->nrg_th_cck);
1204         cmd.table[HD_MIN_ENERGY_OFDM_DET_INDEX] =
1205                                 cpu_to_le16((u16)data->nrg_th_ofdm);
1206
1207         cmd.table[HD_BARKER_CORR_TH_ADD_MIN_INDEX] =
1208                                 __constant_cpu_to_le16(190);
1209         cmd.table[HD_BARKER_CORR_TH_ADD_MIN_MRC_INDEX] =
1210                                 __constant_cpu_to_le16(390);
1211         cmd.table[HD_OFDM_ENERGY_TH_IN_INDEX] =
1212                                 __constant_cpu_to_le16(62);
1213
1214         IWL_DEBUG_CALIB("ofdm: ac %u mrc %u x1 %u mrc_x1 %u thresh %u\n",
1215                         data->auto_corr_ofdm, data->auto_corr_ofdm_mrc,
1216                         data->auto_corr_ofdm_x1, data->auto_corr_ofdm_mrc_x1,
1217                         data->nrg_th_ofdm);
1218
1219         IWL_DEBUG_CALIB("cck: ac %u mrc %u thresh %u\n",
1220                         data->auto_corr_cck, data->auto_corr_cck_mrc,
1221                         data->nrg_th_cck);
1222
1223         /* Update uCode's "work" table, and copy it to DSP */
1224         cmd.control = SENSITIVITY_CMD_CONTROL_WORK_TABLE;
1225
1226         if (flags & CMD_ASYNC)
1227                 cmd_out.meta.u.callback = iwl4965_sensitivity_callback;
1228
1229         /* Don't send command to uCode if nothing has changed */
1230         if (!memcmp(&cmd.table[0], &(priv->sensitivity_tbl[0]),
1231                     sizeof(u16)*HD_TABLE_SIZE)) {
1232                 IWL_DEBUG_CALIB("No change in SENSITIVITY_CMD\n");
1233                 return 0;
1234         }
1235
1236         /* Copy table for comparison next time */
1237         memcpy(&(priv->sensitivity_tbl[0]), &(cmd.table[0]),
1238                sizeof(u16)*HD_TABLE_SIZE);
1239
1240         ret = iwl_send_cmd(priv, &cmd_out);
1241         if (ret)
1242                 IWL_ERROR("SENSITIVITY_CMD failed\n");
1243
1244         return ret;
1245 }
1246
1247 void iwl4965_init_sensitivity(struct iwl_priv *priv, u8 flags, u8 force)
1248 {
1249         struct iwl4965_sensitivity_data *data = NULL;
1250         int i;
1251         int ret  = 0;
1252
1253         IWL_DEBUG_CALIB("Start iwl4965_init_sensitivity\n");
1254
1255         if (force)
1256                 memset(&(priv->sensitivity_tbl[0]), 0,
1257                         sizeof(u16)*HD_TABLE_SIZE);
1258
1259         /* Clear driver's sensitivity algo data */
1260         data = &(priv->sensitivity_data);
1261         memset(data, 0, sizeof(struct iwl4965_sensitivity_data));
1262
1263         data->num_in_cck_no_fa = 0;
1264         data->nrg_curr_state = IWL_FA_TOO_MANY;
1265         data->nrg_prev_state = IWL_FA_TOO_MANY;
1266         data->nrg_silence_ref = 0;
1267         data->nrg_silence_idx = 0;
1268         data->nrg_energy_idx = 0;
1269
1270         for (i = 0; i < 10; i++)
1271                 data->nrg_value[i] = 0;
1272
1273         for (i = 0; i < NRG_NUM_PREV_STAT_L; i++)
1274                 data->nrg_silence_rssi[i] = 0;
1275
1276         data->auto_corr_ofdm = 90;
1277         data->auto_corr_ofdm_mrc = 170;
1278         data->auto_corr_ofdm_x1  = 105;
1279         data->auto_corr_ofdm_mrc_x1 = 220;
1280         data->auto_corr_cck = AUTO_CORR_CCK_MIN_VAL_DEF;
1281         data->auto_corr_cck_mrc = 200;
1282         data->nrg_th_cck = 100;
1283         data->nrg_th_ofdm = 100;
1284
1285         data->last_bad_plcp_cnt_ofdm = 0;
1286         data->last_fa_cnt_ofdm = 0;
1287         data->last_bad_plcp_cnt_cck = 0;
1288         data->last_fa_cnt_cck = 0;
1289
1290         /* Clear prior Sensitivity command data to force send to uCode */
1291         if (force)
1292                 memset(&(priv->sensitivity_tbl[0]), 0,
1293                     sizeof(u16)*HD_TABLE_SIZE);
1294
1295         ret |= iwl4965_sensitivity_write(priv, flags);
1296         IWL_DEBUG_CALIB("<<return 0x%X\n", ret);
1297
1298         return;
1299 }
1300
1301
1302 /* Reset differential Rx gains in NIC to prepare for chain noise calibration.
1303  * Called after every association, but this runs only once!
1304  *  ... once chain noise is calibrated the first time, it's good forever.  */
1305 void iwl4965_chain_noise_reset(struct iwl_priv *priv)
1306 {
1307         struct iwl4965_chain_noise_data *data = NULL;
1308
1309         data = &(priv->chain_noise_data);
1310         if ((data->state == IWL_CHAIN_NOISE_ALIVE) && iwl4965_is_associated(priv)) {
1311                 struct iwl4965_calibration_cmd cmd;
1312
1313                 memset(&cmd, 0, sizeof(cmd));
1314                 cmd.opCode = PHY_CALIBRATE_DIFF_GAIN_CMD;
1315                 cmd.diff_gain_a = 0;
1316                 cmd.diff_gain_b = 0;
1317                 cmd.diff_gain_c = 0;
1318                 iwl_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
1319                                  sizeof(cmd), &cmd);
1320                 msleep(4);
1321                 data->state = IWL_CHAIN_NOISE_ACCUMULATE;
1322                 IWL_DEBUG_CALIB("Run chain_noise_calibrate\n");
1323         }
1324         return;
1325 }
1326
1327 /*
1328  * Accumulate 20 beacons of signal and noise statistics for each of
1329  *   3 receivers/antennas/rx-chains, then figure out:
1330  * 1)  Which antennas are connected.
1331  * 2)  Differential rx gain settings to balance the 3 receivers.
1332  */
1333 static void iwl4965_noise_calibration(struct iwl_priv *priv,
1334                                       struct iwl4965_notif_statistics *stat_resp)
1335 {
1336         struct iwl4965_chain_noise_data *data = NULL;
1337         int ret = 0;
1338
1339         u32 chain_noise_a;
1340         u32 chain_noise_b;
1341         u32 chain_noise_c;
1342         u32 chain_sig_a;
1343         u32 chain_sig_b;
1344         u32 chain_sig_c;
1345         u32 average_sig[NUM_RX_CHAINS] = {INITIALIZATION_VALUE};
1346         u32 average_noise[NUM_RX_CHAINS] = {INITIALIZATION_VALUE};
1347         u32 max_average_sig;
1348         u16 max_average_sig_antenna_i;
1349         u32 min_average_noise = MIN_AVERAGE_NOISE_MAX_VALUE;
1350         u16 min_average_noise_antenna_i = INITIALIZATION_VALUE;
1351         u16 i = 0;
1352         u16 chan_num = INITIALIZATION_VALUE;
1353         u32 band = INITIALIZATION_VALUE;
1354         u32 active_chains = 0;
1355         unsigned long flags;
1356         struct statistics_rx_non_phy *rx_info = &(stat_resp->rx.general);
1357
1358         data = &(priv->chain_noise_data);
1359
1360         /* Accumulate just the first 20 beacons after the first association,
1361          *   then we're done forever. */
1362         if (data->state != IWL_CHAIN_NOISE_ACCUMULATE) {
1363                 if (data->state == IWL_CHAIN_NOISE_ALIVE)
1364                         IWL_DEBUG_CALIB("Wait for noise calib reset\n");
1365                 return;
1366         }
1367
1368         spin_lock_irqsave(&priv->lock, flags);
1369         if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) {
1370                 IWL_DEBUG_CALIB(" << Interference data unavailable\n");
1371                 spin_unlock_irqrestore(&priv->lock, flags);
1372                 return;
1373         }
1374
1375         band = (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) ? 0 : 1;
1376         chan_num = le16_to_cpu(priv->staging_rxon.channel);
1377
1378         /* Make sure we accumulate data for just the associated channel
1379          *   (even if scanning). */
1380         if ((chan_num != (le32_to_cpu(stat_resp->flag) >> 16)) ||
1381             ((STATISTICS_REPLY_FLG_BAND_24G_MSK ==
1382              (stat_resp->flag & STATISTICS_REPLY_FLG_BAND_24G_MSK)) && band)) {
1383                 IWL_DEBUG_CALIB("Stats not from chan=%d, band=%d\n",
1384                                 chan_num, band);
1385                 spin_unlock_irqrestore(&priv->lock, flags);
1386                 return;
1387         }
1388
1389         /* Accumulate beacon statistics values across 20 beacons */
1390         chain_noise_a = le32_to_cpu(rx_info->beacon_silence_rssi_a) &
1391                                 IN_BAND_FILTER;
1392         chain_noise_b = le32_to_cpu(rx_info->beacon_silence_rssi_b) &
1393                                 IN_BAND_FILTER;
1394         chain_noise_c = le32_to_cpu(rx_info->beacon_silence_rssi_c) &
1395                                 IN_BAND_FILTER;
1396
1397         chain_sig_a = le32_to_cpu(rx_info->beacon_rssi_a) & IN_BAND_FILTER;
1398         chain_sig_b = le32_to_cpu(rx_info->beacon_rssi_b) & IN_BAND_FILTER;
1399         chain_sig_c = le32_to_cpu(rx_info->beacon_rssi_c) & IN_BAND_FILTER;
1400
1401         spin_unlock_irqrestore(&priv->lock, flags);
1402
1403         data->beacon_count++;
1404
1405         data->chain_noise_a = (chain_noise_a + data->chain_noise_a);
1406         data->chain_noise_b = (chain_noise_b + data->chain_noise_b);
1407         data->chain_noise_c = (chain_noise_c + data->chain_noise_c);
1408
1409         data->chain_signal_a = (chain_sig_a + data->chain_signal_a);
1410         data->chain_signal_b = (chain_sig_b + data->chain_signal_b);
1411         data->chain_signal_c = (chain_sig_c + data->chain_signal_c);
1412
1413         IWL_DEBUG_CALIB("chan=%d, band=%d, beacon=%d\n", chan_num, band,
1414                         data->beacon_count);
1415         IWL_DEBUG_CALIB("chain_sig: a %d b %d c %d\n",
1416                         chain_sig_a, chain_sig_b, chain_sig_c);
1417         IWL_DEBUG_CALIB("chain_noise: a %d b %d c %d\n",
1418                         chain_noise_a, chain_noise_b, chain_noise_c);
1419
1420         /* If this is the 20th beacon, determine:
1421          * 1)  Disconnected antennas (using signal strengths)
1422          * 2)  Differential gain (using silence noise) to balance receivers */
1423         if (data->beacon_count == CAL_NUM_OF_BEACONS) {
1424
1425                 /* Analyze signal for disconnected antenna */
1426                 average_sig[0] = (data->chain_signal_a) / CAL_NUM_OF_BEACONS;
1427                 average_sig[1] = (data->chain_signal_b) / CAL_NUM_OF_BEACONS;
1428                 average_sig[2] = (data->chain_signal_c) / CAL_NUM_OF_BEACONS;
1429
1430                 if (average_sig[0] >= average_sig[1]) {
1431                         max_average_sig = average_sig[0];
1432                         max_average_sig_antenna_i = 0;
1433                         active_chains = (1 << max_average_sig_antenna_i);
1434                 } else {
1435                         max_average_sig = average_sig[1];
1436                         max_average_sig_antenna_i = 1;
1437                         active_chains = (1 << max_average_sig_antenna_i);
1438                 }
1439
1440                 if (average_sig[2] >= max_average_sig) {
1441                         max_average_sig = average_sig[2];
1442                         max_average_sig_antenna_i = 2;
1443                         active_chains = (1 << max_average_sig_antenna_i);
1444                 }
1445
1446                 IWL_DEBUG_CALIB("average_sig: a %d b %d c %d\n",
1447                              average_sig[0], average_sig[1], average_sig[2]);
1448                 IWL_DEBUG_CALIB("max_average_sig = %d, antenna %d\n",
1449                              max_average_sig, max_average_sig_antenna_i);
1450
1451                 /* Compare signal strengths for all 3 receivers. */
1452                 for (i = 0; i < NUM_RX_CHAINS; i++) {
1453                         if (i != max_average_sig_antenna_i) {
1454                                 s32 rssi_delta = (max_average_sig -
1455                                                   average_sig[i]);
1456
1457                                 /* If signal is very weak, compared with
1458                                  * strongest, mark it as disconnected. */
1459                                 if (rssi_delta > MAXIMUM_ALLOWED_PATHLOSS)
1460                                         data->disconn_array[i] = 1;
1461                                 else
1462                                         active_chains |= (1 << i);
1463                         IWL_DEBUG_CALIB("i = %d  rssiDelta = %d  "
1464                                      "disconn_array[i] = %d\n",
1465                                      i, rssi_delta, data->disconn_array[i]);
1466                         }
1467                 }
1468
1469                 /*If both chains A & B are disconnected -
1470                  * connect B and leave A as is */
1471                 if (data->disconn_array[CHAIN_A] &&
1472                     data->disconn_array[CHAIN_B]) {
1473                         data->disconn_array[CHAIN_B] = 0;
1474                         active_chains |= (1 << CHAIN_B);
1475                         IWL_DEBUG_CALIB("both A & B chains are disconnected! "
1476                                      "W/A - declare B as connected\n");
1477                 }
1478
1479                 IWL_DEBUG_CALIB("active_chains (bitwise) = 0x%x\n",
1480                                 active_chains);
1481
1482                 /* Save for use within RXON, TX, SCAN commands, etc. */
1483                 priv->valid_antenna = active_chains;
1484
1485                 /* Analyze noise for rx balance */
1486                 average_noise[0] = ((data->chain_noise_a)/CAL_NUM_OF_BEACONS);
1487                 average_noise[1] = ((data->chain_noise_b)/CAL_NUM_OF_BEACONS);
1488                 average_noise[2] = ((data->chain_noise_c)/CAL_NUM_OF_BEACONS);
1489
1490                 for (i = 0; i < NUM_RX_CHAINS; i++) {
1491                         if (!(data->disconn_array[i]) &&
1492                            (average_noise[i] <= min_average_noise)) {
1493                                 /* This means that chain i is active and has
1494                                  * lower noise values so far: */
1495                                 min_average_noise = average_noise[i];
1496                                 min_average_noise_antenna_i = i;
1497                         }
1498                 }
1499
1500                 data->delta_gain_code[min_average_noise_antenna_i] = 0;
1501
1502                 IWL_DEBUG_CALIB("average_noise: a %d b %d c %d\n",
1503                                 average_noise[0], average_noise[1],
1504                                 average_noise[2]);
1505
1506                 IWL_DEBUG_CALIB("min_average_noise = %d, antenna %d\n",
1507                                 min_average_noise, min_average_noise_antenna_i);
1508
1509                 for (i = 0; i < NUM_RX_CHAINS; i++) {
1510                         s32 delta_g = 0;
1511
1512                         if (!(data->disconn_array[i]) &&
1513                             (data->delta_gain_code[i] ==
1514                              CHAIN_NOISE_DELTA_GAIN_INIT_VAL)) {
1515                                 delta_g = average_noise[i] - min_average_noise;
1516                                 data->delta_gain_code[i] = (u8)((delta_g *
1517                                                                     10) / 15);
1518                                 if (CHAIN_NOISE_MAX_DELTA_GAIN_CODE <
1519                                    data->delta_gain_code[i])
1520                                         data->delta_gain_code[i] =
1521                                           CHAIN_NOISE_MAX_DELTA_GAIN_CODE;
1522
1523                                 data->delta_gain_code[i] =
1524                                         (data->delta_gain_code[i] | (1 << 2));
1525                         } else
1526                                 data->delta_gain_code[i] = 0;
1527                 }
1528                 IWL_DEBUG_CALIB("delta_gain_codes: a %d b %d c %d\n",
1529                              data->delta_gain_code[0],
1530                              data->delta_gain_code[1],
1531                              data->delta_gain_code[2]);
1532
1533                 /* Differential gain gets sent to uCode only once */
1534                 if (!data->radio_write) {
1535                         struct iwl4965_calibration_cmd cmd;
1536                         data->radio_write = 1;
1537
1538                         memset(&cmd, 0, sizeof(cmd));
1539                         cmd.opCode = PHY_CALIBRATE_DIFF_GAIN_CMD;
1540                         cmd.diff_gain_a = data->delta_gain_code[0];
1541                         cmd.diff_gain_b = data->delta_gain_code[1];
1542                         cmd.diff_gain_c = data->delta_gain_code[2];
1543                         ret = iwl_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
1544                                               sizeof(cmd), &cmd);
1545                         if (ret)
1546                                 IWL_DEBUG_CALIB("fail sending cmd "
1547                                              "REPLY_PHY_CALIBRATION_CMD \n");
1548
1549                         /* TODO we might want recalculate
1550                          * rx_chain in rxon cmd */
1551
1552                         /* Mark so we run this algo only once! */
1553                         data->state = IWL_CHAIN_NOISE_CALIBRATED;
1554                 }
1555                 data->chain_noise_a = 0;
1556                 data->chain_noise_b = 0;
1557                 data->chain_noise_c = 0;
1558                 data->chain_signal_a = 0;
1559                 data->chain_signal_b = 0;
1560                 data->chain_signal_c = 0;
1561                 data->beacon_count = 0;
1562         }
1563         return;
1564 }
1565
1566 static void iwl4965_sensitivity_calibration(struct iwl_priv *priv,
1567                                             struct iwl4965_notif_statistics *resp)
1568 {
1569         u32 rx_enable_time;
1570         u32 fa_cck;
1571         u32 fa_ofdm;
1572         u32 bad_plcp_cck;
1573         u32 bad_plcp_ofdm;
1574         u32 norm_fa_ofdm;
1575         u32 norm_fa_cck;
1576         struct iwl4965_sensitivity_data *data = NULL;
1577         struct statistics_rx_non_phy *rx_info = &(resp->rx.general);
1578         struct statistics_rx *statistics = &(resp->rx);
1579         unsigned long flags;
1580         struct statistics_general_data statis;
1581         int ret;
1582
1583         data = &(priv->sensitivity_data);
1584
1585         if (!iwl4965_is_associated(priv)) {
1586                 IWL_DEBUG_CALIB("<< - not associated\n");
1587                 return;
1588         }
1589
1590         spin_lock_irqsave(&priv->lock, flags);
1591         if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) {
1592                 IWL_DEBUG_CALIB("<< invalid data.\n");
1593                 spin_unlock_irqrestore(&priv->lock, flags);
1594                 return;
1595         }
1596
1597         /* Extract Statistics: */
1598         rx_enable_time = le32_to_cpu(rx_info->channel_load);
1599         fa_cck = le32_to_cpu(statistics->cck.false_alarm_cnt);
1600         fa_ofdm = le32_to_cpu(statistics->ofdm.false_alarm_cnt);
1601         bad_plcp_cck = le32_to_cpu(statistics->cck.plcp_err);
1602         bad_plcp_ofdm = le32_to_cpu(statistics->ofdm.plcp_err);
1603
1604         statis.beacon_silence_rssi_a =
1605                         le32_to_cpu(statistics->general.beacon_silence_rssi_a);
1606         statis.beacon_silence_rssi_b =
1607                         le32_to_cpu(statistics->general.beacon_silence_rssi_b);
1608         statis.beacon_silence_rssi_c =
1609                         le32_to_cpu(statistics->general.beacon_silence_rssi_c);
1610         statis.beacon_energy_a =
1611                         le32_to_cpu(statistics->general.beacon_energy_a);
1612         statis.beacon_energy_b =
1613                         le32_to_cpu(statistics->general.beacon_energy_b);
1614         statis.beacon_energy_c =
1615                         le32_to_cpu(statistics->general.beacon_energy_c);
1616
1617         spin_unlock_irqrestore(&priv->lock, flags);
1618
1619         IWL_DEBUG_CALIB("rx_enable_time = %u usecs\n", rx_enable_time);
1620
1621         if (!rx_enable_time) {
1622                 IWL_DEBUG_CALIB("<< RX Enable Time == 0! \n");
1623                 return;
1624         }
1625
1626         /* These statistics increase monotonically, and do not reset
1627          *   at each beacon.  Calculate difference from last value, or just
1628          *   use the new statistics value if it has reset or wrapped around. */
1629         if (data->last_bad_plcp_cnt_cck > bad_plcp_cck)
1630                 data->last_bad_plcp_cnt_cck = bad_plcp_cck;
1631         else {
1632                 bad_plcp_cck -= data->last_bad_plcp_cnt_cck;
1633                 data->last_bad_plcp_cnt_cck += bad_plcp_cck;
1634         }
1635
1636         if (data->last_bad_plcp_cnt_ofdm > bad_plcp_ofdm)
1637                 data->last_bad_plcp_cnt_ofdm = bad_plcp_ofdm;
1638         else {
1639                 bad_plcp_ofdm -= data->last_bad_plcp_cnt_ofdm;
1640                 data->last_bad_plcp_cnt_ofdm += bad_plcp_ofdm;
1641         }
1642
1643         if (data->last_fa_cnt_ofdm > fa_ofdm)
1644                 data->last_fa_cnt_ofdm = fa_ofdm;
1645         else {
1646                 fa_ofdm -= data->last_fa_cnt_ofdm;
1647                 data->last_fa_cnt_ofdm += fa_ofdm;
1648         }
1649
1650         if (data->last_fa_cnt_cck > fa_cck)
1651                 data->last_fa_cnt_cck = fa_cck;
1652         else {
1653                 fa_cck -= data->last_fa_cnt_cck;
1654                 data->last_fa_cnt_cck += fa_cck;
1655         }
1656
1657         /* Total aborted signal locks */
1658         norm_fa_ofdm = fa_ofdm + bad_plcp_ofdm;
1659         norm_fa_cck = fa_cck + bad_plcp_cck;
1660
1661         IWL_DEBUG_CALIB("cck: fa %u badp %u  ofdm: fa %u badp %u\n", fa_cck,
1662                         bad_plcp_cck, fa_ofdm, bad_plcp_ofdm);
1663
1664         iwl4965_sens_auto_corr_ofdm(priv, norm_fa_ofdm, rx_enable_time);
1665         iwl4965_sens_energy_cck(priv, norm_fa_cck, rx_enable_time, &statis);
1666         ret = iwl4965_sensitivity_write(priv, CMD_ASYNC);
1667
1668         return;
1669 }
1670
1671 static void iwl4965_bg_sensitivity_work(struct work_struct *work)
1672 {
1673         struct iwl_priv *priv = container_of(work, struct iwl_priv,
1674                         sensitivity_work);
1675
1676         mutex_lock(&priv->mutex);
1677
1678         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
1679             test_bit(STATUS_SCANNING, &priv->status)) {
1680                 mutex_unlock(&priv->mutex);
1681                 return;
1682         }
1683
1684         if (priv->start_calib) {
1685                 iwl4965_noise_calibration(priv, &priv->statistics);
1686
1687                 if (priv->sensitivity_data.state ==
1688                                         IWL_SENS_CALIB_NEED_REINIT) {
1689                         iwl4965_init_sensitivity(priv, CMD_ASYNC, 0);
1690                         priv->sensitivity_data.state = IWL_SENS_CALIB_ALLOWED;
1691                 } else
1692                         iwl4965_sensitivity_calibration(priv,
1693                                         &priv->statistics);
1694         }
1695
1696         mutex_unlock(&priv->mutex);
1697         return;
1698 }
1699 #endif /*CONFIG_IWL4965_SENSITIVITY*/
1700
1701 static void iwl4965_bg_txpower_work(struct work_struct *work)
1702 {
1703         struct iwl_priv *priv = container_of(work, struct iwl_priv,
1704                         txpower_work);
1705
1706         /* If a scan happened to start before we got here
1707          * then just return; the statistics notification will
1708          * kick off another scheduled work to compensate for
1709          * any temperature delta we missed here. */
1710         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
1711             test_bit(STATUS_SCANNING, &priv->status))
1712                 return;
1713
1714         mutex_lock(&priv->mutex);
1715
1716         /* Regardless of if we are assocaited, we must reconfigure the
1717          * TX power since frames can be sent on non-radar channels while
1718          * not associated */
1719         iwl4965_hw_reg_send_txpower(priv);
1720
1721         /* Update last_temperature to keep is_calib_needed from running
1722          * when it isn't needed... */
1723         priv->last_temperature = priv->temperature;
1724
1725         mutex_unlock(&priv->mutex);
1726 }
1727
1728 /*
1729  * Acquire priv->lock before calling this function !
1730  */
1731 static void iwl4965_set_wr_ptrs(struct iwl_priv *priv, int txq_id, u32 index)
1732 {
1733         iwl_write_direct32(priv, HBUS_TARG_WRPTR,
1734                              (index & 0xff) | (txq_id << 8));
1735         iwl_write_prph(priv, KDR_SCD_QUEUE_RDPTR(txq_id), index);
1736 }
1737
1738 /**
1739  * iwl4965_tx_queue_set_status - (optionally) start Tx/Cmd queue
1740  * @tx_fifo_id: Tx DMA/FIFO channel (range 0-7) that the queue will feed
1741  * @scd_retry: (1) Indicates queue will be used in aggregation mode
1742  *
1743  * NOTE:  Acquire priv->lock before calling this function !
1744  */
1745 static void iwl4965_tx_queue_set_status(struct iwl_priv *priv,
1746                                         struct iwl4965_tx_queue *txq,
1747                                         int tx_fifo_id, int scd_retry)
1748 {
1749         int txq_id = txq->q.id;
1750
1751         /* Find out whether to activate Tx queue */
1752         int active = test_bit(txq_id, &priv->txq_ctx_active_msk)?1:0;
1753
1754         /* Set up and activate */
1755         iwl_write_prph(priv, KDR_SCD_QUEUE_STATUS_BITS(txq_id),
1756                                  (active << SCD_QUEUE_STTS_REG_POS_ACTIVE) |
1757                                  (tx_fifo_id << SCD_QUEUE_STTS_REG_POS_TXF) |
1758                                  (scd_retry << SCD_QUEUE_STTS_REG_POS_WSL) |
1759                                  (scd_retry << SCD_QUEUE_STTS_REG_POS_SCD_ACK) |
1760                                  SCD_QUEUE_STTS_REG_MSK);
1761
1762         txq->sched_retry = scd_retry;
1763
1764         IWL_DEBUG_INFO("%s %s Queue %d on AC %d\n",
1765                        active ? "Activate" : "Deactivate",
1766                        scd_retry ? "BA" : "AC", txq_id, tx_fifo_id);
1767 }
1768
1769 static const u16 default_queue_to_tx_fifo[] = {
1770         IWL_TX_FIFO_AC3,
1771         IWL_TX_FIFO_AC2,
1772         IWL_TX_FIFO_AC1,
1773         IWL_TX_FIFO_AC0,
1774         IWL_CMD_FIFO_NUM,
1775         IWL_TX_FIFO_HCCA_1,
1776         IWL_TX_FIFO_HCCA_2
1777 };
1778
1779 static inline void iwl4965_txq_ctx_activate(struct iwl_priv *priv, int txq_id)
1780 {
1781         set_bit(txq_id, &priv->txq_ctx_active_msk);
1782 }
1783
1784 static inline void iwl4965_txq_ctx_deactivate(struct iwl_priv *priv, int txq_id)
1785 {
1786         clear_bit(txq_id, &priv->txq_ctx_active_msk);
1787 }
1788
1789 int iwl4965_alive_notify(struct iwl_priv *priv)
1790 {
1791         u32 a;
1792         int i = 0;
1793         unsigned long flags;
1794         int ret;
1795
1796         spin_lock_irqsave(&priv->lock, flags);
1797
1798 #ifdef CONFIG_IWL4965_SENSITIVITY
1799         memset(&(priv->sensitivity_data), 0,
1800                sizeof(struct iwl4965_sensitivity_data));
1801         memset(&(priv->chain_noise_data), 0,
1802                sizeof(struct iwl4965_chain_noise_data));
1803         for (i = 0; i < NUM_RX_CHAINS; i++)
1804                 priv->chain_noise_data.delta_gain_code[i] =
1805                                 CHAIN_NOISE_DELTA_GAIN_INIT_VAL;
1806 #endif /* CONFIG_IWL4965_SENSITIVITY*/
1807         ret = iwl_grab_nic_access(priv);
1808         if (ret) {
1809                 spin_unlock_irqrestore(&priv->lock, flags);
1810                 return ret;
1811         }
1812
1813         /* Clear 4965's internal Tx Scheduler data base */
1814         priv->scd_base_addr = iwl_read_prph(priv, KDR_SCD_SRAM_BASE_ADDR);
1815         a = priv->scd_base_addr + SCD_CONTEXT_DATA_OFFSET;
1816         for (; a < priv->scd_base_addr + SCD_TX_STTS_BITMAP_OFFSET; a += 4)
1817                 iwl_write_targ_mem(priv, a, 0);
1818         for (; a < priv->scd_base_addr + SCD_TRANSLATE_TBL_OFFSET; a += 4)
1819                 iwl_write_targ_mem(priv, a, 0);
1820         for (; a < sizeof(u16) * priv->hw_setting.max_txq_num; a += 4)
1821                 iwl_write_targ_mem(priv, a, 0);
1822
1823         /* Tel 4965 where to find Tx byte count tables */
1824         iwl_write_prph(priv, KDR_SCD_DRAM_BASE_ADDR,
1825                 (priv->hw_setting.shared_phys +
1826                  offsetof(struct iwl4965_shared, queues_byte_cnt_tbls)) >> 10);
1827
1828         /* Disable chain mode for all queues */
1829         iwl_write_prph(priv, KDR_SCD_QUEUECHAIN_SEL, 0);
1830
1831         /* Initialize each Tx queue (including the command queue) */
1832         for (i = 0; i < priv->hw_setting.max_txq_num; i++) {
1833
1834                 /* TFD circular buffer read/write indexes */
1835                 iwl_write_prph(priv, KDR_SCD_QUEUE_RDPTR(i), 0);
1836                 iwl_write_direct32(priv, HBUS_TARG_WRPTR, 0 | (i << 8));
1837
1838                 /* Max Tx Window size for Scheduler-ACK mode */
1839                 iwl_write_targ_mem(priv, priv->scd_base_addr +
1840                                         SCD_CONTEXT_QUEUE_OFFSET(i),
1841                                         (SCD_WIN_SIZE <<
1842                                         SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
1843                                         SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
1844
1845                 /* Frame limit */
1846                 iwl_write_targ_mem(priv, priv->scd_base_addr +
1847                                         SCD_CONTEXT_QUEUE_OFFSET(i) +
1848                                         sizeof(u32),
1849                                         (SCD_FRAME_LIMIT <<
1850                                         SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) &
1851                                         SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
1852
1853         }
1854         iwl_write_prph(priv, KDR_SCD_INTERRUPT_MASK,
1855                                  (1 << priv->hw_setting.max_txq_num) - 1);
1856
1857         /* Activate all Tx DMA/FIFO channels */
1858         iwl_write_prph(priv, KDR_SCD_TXFACT,
1859                                  SCD_TXFACT_REG_TXFIFO_MASK(0, 7));
1860
1861         iwl4965_set_wr_ptrs(priv, IWL_CMD_QUEUE_NUM, 0);
1862
1863         /* Map each Tx/cmd queue to its corresponding fifo */
1864         for (i = 0; i < ARRAY_SIZE(default_queue_to_tx_fifo); i++) {
1865                 int ac = default_queue_to_tx_fifo[i];
1866                 iwl4965_txq_ctx_activate(priv, i);
1867                 iwl4965_tx_queue_set_status(priv, &priv->txq[i], ac, 0);
1868         }
1869
1870         iwl_release_nic_access(priv);
1871         spin_unlock_irqrestore(&priv->lock, flags);
1872
1873         return ret;
1874 }
1875
1876 /**
1877  * iwl4965_hw_set_hw_setting
1878  *
1879  * Called when initializing driver
1880  */
1881 int iwl4965_hw_set_hw_setting(struct iwl_priv *priv)
1882 {
1883         int ret = 0;
1884
1885         if ((priv->cfg->mod_params->num_of_queues > IWL_MAX_NUM_QUEUES) ||
1886             (priv->cfg->mod_params->num_of_queues < IWL_MIN_NUM_QUEUES)) {
1887                 IWL_ERROR("invalid queues_num, should be between %d and %d\n",
1888                           IWL_MIN_NUM_QUEUES, IWL_MAX_NUM_QUEUES);
1889                 ret = -EINVAL;
1890                 goto out;
1891         }
1892
1893         /* Allocate area for Tx byte count tables and Rx queue status */
1894         priv->hw_setting.shared_virt =
1895             pci_alloc_consistent(priv->pci_dev,
1896                                  sizeof(struct iwl4965_shared),
1897                                  &priv->hw_setting.shared_phys);
1898
1899         if (!priv->hw_setting.shared_virt) {
1900                 ret = -ENOMEM;
1901                 goto out;
1902         }
1903
1904         memset(priv->hw_setting.shared_virt, 0, sizeof(struct iwl4965_shared));
1905
1906         priv->hw_setting.max_txq_num = priv->cfg->mod_params->num_of_queues;
1907         priv->hw_setting.tx_cmd_len = sizeof(struct iwl4965_tx_cmd);
1908         priv->hw_setting.max_rxq_size = RX_QUEUE_SIZE;
1909         priv->hw_setting.max_rxq_log = RX_QUEUE_SIZE_LOG;
1910         if (priv->cfg->mod_params->amsdu_size_8K)
1911                 priv->hw_setting.rx_buf_size = IWL_RX_BUF_SIZE_8K;
1912         else
1913                 priv->hw_setting.rx_buf_size = IWL_RX_BUF_SIZE_4K;
1914         priv->hw_setting.max_pkt_size = priv->hw_setting.rx_buf_size - 256;
1915         priv->hw_setting.max_stations = IWL4965_STATION_COUNT;
1916         priv->hw_setting.bcast_sta_id = IWL4965_BROADCAST_ID;
1917
1918         priv->hw_setting.tx_ant_num = 2;
1919
1920 out:
1921         return ret;
1922 }
1923
1924 /**
1925  * iwl4965_hw_txq_ctx_free - Free TXQ Context
1926  *
1927  * Destroy all TX DMA queues and structures
1928  */
1929 void iwl4965_hw_txq_ctx_free(struct iwl_priv *priv)
1930 {
1931         int txq_id;
1932
1933         /* Tx queues */
1934         for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++)
1935                 iwl4965_tx_queue_free(priv, &priv->txq[txq_id]);
1936
1937         /* Keep-warm buffer */
1938         iwl4965_kw_free(priv);
1939 }
1940
1941 /**
1942  * iwl4965_hw_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr]
1943  *
1944  * Does NOT advance any TFD circular buffer read/write indexes
1945  * Does NOT free the TFD itself (which is within circular buffer)
1946  */
1947 int iwl4965_hw_txq_free_tfd(struct iwl_priv *priv, struct iwl4965_tx_queue *txq)
1948 {
1949         struct iwl4965_tfd_frame *bd_tmp = (struct iwl4965_tfd_frame *)&txq->bd[0];
1950         struct iwl4965_tfd_frame *bd = &bd_tmp[txq->q.read_ptr];
1951         struct pci_dev *dev = priv->pci_dev;
1952         int i;
1953         int counter = 0;
1954         int index, is_odd;
1955
1956         /* Host command buffers stay mapped in memory, nothing to clean */
1957         if (txq->q.id == IWL_CMD_QUEUE_NUM)
1958                 return 0;
1959
1960         /* Sanity check on number of chunks */
1961         counter = IWL_GET_BITS(*bd, num_tbs);
1962         if (counter > MAX_NUM_OF_TBS) {
1963                 IWL_ERROR("Too many chunks: %i\n", counter);
1964                 /* @todo issue fatal error, it is quite serious situation */
1965                 return 0;
1966         }
1967
1968         /* Unmap chunks, if any.
1969          * TFD info for odd chunks is different format than for even chunks. */
1970         for (i = 0; i < counter; i++) {
1971                 index = i / 2;
1972                 is_odd = i & 0x1;
1973
1974                 if (is_odd)
1975                         pci_unmap_single(
1976                                 dev,
1977                                 IWL_GET_BITS(bd->pa[index], tb2_addr_lo16) |
1978                                 (IWL_GET_BITS(bd->pa[index],
1979                                               tb2_addr_hi20) << 16),
1980                                 IWL_GET_BITS(bd->pa[index], tb2_len),
1981                                 PCI_DMA_TODEVICE);
1982
1983                 else if (i > 0)
1984                         pci_unmap_single(dev,
1985                                          le32_to_cpu(bd->pa[index].tb1_addr),
1986                                          IWL_GET_BITS(bd->pa[index], tb1_len),
1987                                          PCI_DMA_TODEVICE);
1988
1989                 /* Free SKB, if any, for this chunk */
1990                 if (txq->txb[txq->q.read_ptr].skb[i]) {
1991                         struct sk_buff *skb = txq->txb[txq->q.read_ptr].skb[i];
1992
1993                         dev_kfree_skb(skb);
1994                         txq->txb[txq->q.read_ptr].skb[i] = NULL;
1995                 }
1996         }
1997         return 0;
1998 }
1999
2000 int iwl4965_hw_reg_set_txpower(struct iwl_priv *priv, s8 power)
2001 {
2002         IWL_ERROR("TODO: Implement iwl4965_hw_reg_set_txpower!\n");
2003         return -EINVAL;
2004 }
2005
2006 static s32 iwl4965_math_div_round(s32 num, s32 denom, s32 *res)
2007 {
2008         s32 sign = 1;
2009
2010         if (num < 0) {
2011                 sign = -sign;
2012                 num = -num;
2013         }
2014         if (denom < 0) {
2015                 sign = -sign;
2016                 denom = -denom;
2017         }
2018         *res = 1;
2019         *res = ((num * 2 + denom) / (denom * 2)) * sign;
2020
2021         return 1;
2022 }
2023
2024 /**
2025  * iwl4965_get_voltage_compensation - Power supply voltage comp for txpower
2026  *
2027  * Determines power supply voltage compensation for txpower calculations.
2028  * Returns number of 1/2-dB steps to subtract from gain table index,
2029  * to compensate for difference between power supply voltage during
2030  * factory measurements, vs. current power supply voltage.
2031  *
2032  * Voltage indication is higher for lower voltage.
2033  * Lower voltage requires more gain (lower gain table index).
2034  */
2035 static s32 iwl4965_get_voltage_compensation(s32 eeprom_voltage,
2036                                             s32 current_voltage)
2037 {
2038         s32 comp = 0;
2039
2040         if ((TX_POWER_IWL_ILLEGAL_VOLTAGE == eeprom_voltage) ||
2041             (TX_POWER_IWL_ILLEGAL_VOLTAGE == current_voltage))
2042                 return 0;
2043
2044         iwl4965_math_div_round(current_voltage - eeprom_voltage,
2045                                TX_POWER_IWL_VOLTAGE_CODES_PER_03V, &comp);
2046
2047         if (current_voltage > eeprom_voltage)
2048                 comp *= 2;
2049         if ((comp < -2) || (comp > 2))
2050                 comp = 0;
2051
2052         return comp;
2053 }
2054
2055 static const struct iwl_channel_info *
2056 iwl4965_get_channel_txpower_info(struct iwl_priv *priv,
2057                                  enum ieee80211_band band, u16 channel)
2058 {
2059         const struct iwl_channel_info *ch_info;
2060
2061         ch_info = iwl_get_channel_info(priv, band, channel);
2062
2063         if (!is_channel_valid(ch_info))
2064                 return NULL;
2065
2066         return ch_info;
2067 }
2068
2069 static s32 iwl4965_get_tx_atten_grp(u16 channel)
2070 {
2071         if (channel >= CALIB_IWL_TX_ATTEN_GR5_FCH &&
2072             channel <= CALIB_IWL_TX_ATTEN_GR5_LCH)
2073                 return CALIB_CH_GROUP_5;
2074
2075         if (channel >= CALIB_IWL_TX_ATTEN_GR1_FCH &&
2076             channel <= CALIB_IWL_TX_ATTEN_GR1_LCH)
2077                 return CALIB_CH_GROUP_1;
2078
2079         if (channel >= CALIB_IWL_TX_ATTEN_GR2_FCH &&
2080             channel <= CALIB_IWL_TX_ATTEN_GR2_LCH)
2081                 return CALIB_CH_GROUP_2;
2082
2083         if (channel >= CALIB_IWL_TX_ATTEN_GR3_FCH &&
2084             channel <= CALIB_IWL_TX_ATTEN_GR3_LCH)
2085                 return CALIB_CH_GROUP_3;
2086
2087         if (channel >= CALIB_IWL_TX_ATTEN_GR4_FCH &&
2088             channel <= CALIB_IWL_TX_ATTEN_GR4_LCH)
2089                 return CALIB_CH_GROUP_4;
2090
2091         IWL_ERROR("Can't find txatten group for channel %d.\n", channel);
2092         return -1;
2093 }
2094
2095 static u32 iwl4965_get_sub_band(const struct iwl_priv *priv, u32 channel)
2096 {
2097         s32 b = -1;
2098
2099         for (b = 0; b < EEPROM_TX_POWER_BANDS; b++) {
2100                 if (priv->eeprom.calib_info.band_info[b].ch_from == 0)
2101                         continue;
2102
2103                 if ((channel >= priv->eeprom.calib_info.band_info[b].ch_from)
2104                     && (channel <= priv->eeprom.calib_info.band_info[b].ch_to))
2105                         break;
2106         }
2107
2108         return b;
2109 }
2110
2111 static s32 iwl4965_interpolate_value(s32 x, s32 x1, s32 y1, s32 x2, s32 y2)
2112 {
2113         s32 val;
2114
2115         if (x2 == x1)
2116                 return y1;
2117         else {
2118                 iwl4965_math_div_round((x2 - x) * (y1 - y2), (x2 - x1), &val);
2119                 return val + y2;
2120         }
2121 }
2122
2123 /**
2124  * iwl4965_interpolate_chan - Interpolate factory measurements for one channel
2125  *
2126  * Interpolates factory measurements from the two sample channels within a
2127  * sub-band, to apply to channel of interest.  Interpolation is proportional to
2128  * differences in channel frequencies, which is proportional to differences
2129  * in channel number.
2130  */
2131 static int iwl4965_interpolate_chan(struct iwl_priv *priv, u32 channel,
2132                                     struct iwl4965_eeprom_calib_ch_info *chan_info)
2133 {
2134         s32 s = -1;
2135         u32 c;
2136         u32 m;
2137         const struct iwl4965_eeprom_calib_measure *m1;
2138         const struct iwl4965_eeprom_calib_measure *m2;
2139         struct iwl4965_eeprom_calib_measure *omeas;
2140         u32 ch_i1;
2141         u32 ch_i2;
2142
2143         s = iwl4965_get_sub_band(priv, channel);
2144         if (s >= EEPROM_TX_POWER_BANDS) {
2145                 IWL_ERROR("Tx Power can not find channel %d ", channel);
2146                 return -1;
2147         }
2148
2149         ch_i1 = priv->eeprom.calib_info.band_info[s].ch1.ch_num;
2150         ch_i2 = priv->eeprom.calib_info.band_info[s].ch2.ch_num;
2151         chan_info->ch_num = (u8) channel;
2152
2153         IWL_DEBUG_TXPOWER("channel %d subband %d factory cal ch %d & %d\n",
2154                           channel, s, ch_i1, ch_i2);
2155
2156         for (c = 0; c < EEPROM_TX_POWER_TX_CHAINS; c++) {
2157                 for (m = 0; m < EEPROM_TX_POWER_MEASUREMENTS; m++) {
2158                         m1 = &(priv->eeprom.calib_info.band_info[s].ch1.
2159                                measurements[c][m]);
2160                         m2 = &(priv->eeprom.calib_info.band_info[s].ch2.
2161                                measurements[c][m]);
2162                         omeas = &(chan_info->measurements[c][m]);
2163
2164                         omeas->actual_pow =
2165                             (u8) iwl4965_interpolate_value(channel, ch_i1,
2166                                                            m1->actual_pow,
2167                                                            ch_i2,
2168                                                            m2->actual_pow);
2169                         omeas->gain_idx =
2170                             (u8) iwl4965_interpolate_value(channel, ch_i1,
2171                                                            m1->gain_idx, ch_i2,
2172                                                            m2->gain_idx);
2173                         omeas->temperature =
2174                             (u8) iwl4965_interpolate_value(channel, ch_i1,
2175                                                            m1->temperature,
2176                                                            ch_i2,
2177                                                            m2->temperature);
2178                         omeas->pa_det =
2179                             (s8) iwl4965_interpolate_value(channel, ch_i1,
2180                                                            m1->pa_det, ch_i2,
2181                                                            m2->pa_det);
2182
2183                         IWL_DEBUG_TXPOWER
2184                             ("chain %d meas %d AP1=%d AP2=%d AP=%d\n", c, m,
2185                              m1->actual_pow, m2->actual_pow, omeas->actual_pow);
2186                         IWL_DEBUG_TXPOWER
2187                             ("chain %d meas %d NI1=%d NI2=%d NI=%d\n", c, m,
2188                              m1->gain_idx, m2->gain_idx, omeas->gain_idx);
2189                         IWL_DEBUG_TXPOWER
2190                             ("chain %d meas %d PA1=%d PA2=%d PA=%d\n", c, m,
2191                              m1->pa_det, m2->pa_det, omeas->pa_det);
2192                         IWL_DEBUG_TXPOWER
2193                             ("chain %d meas %d  T1=%d  T2=%d  T=%d\n", c, m,
2194                              m1->temperature, m2->temperature,
2195                              omeas->temperature);
2196                 }
2197         }
2198
2199         return 0;
2200 }
2201
2202 /* bit-rate-dependent table to prevent Tx distortion, in half-dB units,
2203  * for OFDM 6, 12, 18, 24, 36, 48, 54, 60 MBit, and CCK all rates. */
2204 static s32 back_off_table[] = {
2205         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 20 MHz */
2206         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 20 MHz */
2207         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 40 MHz */
2208         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 40 MHz */
2209         10                      /* CCK */
2210 };
2211
2212 /* Thermal compensation values for txpower for various frequency ranges ...
2213  *   ratios from 3:1 to 4.5:1 of degrees (Celsius) per half-dB gain adjust */
2214 static struct iwl4965_txpower_comp_entry {
2215         s32 degrees_per_05db_a;
2216         s32 degrees_per_05db_a_denom;
2217 } tx_power_cmp_tble[CALIB_CH_GROUP_MAX] = {
2218         {9, 2},                 /* group 0 5.2, ch  34-43 */
2219         {4, 1},                 /* group 1 5.2, ch  44-70 */
2220         {4, 1},                 /* group 2 5.2, ch  71-124 */
2221         {4, 1},                 /* group 3 5.2, ch 125-200 */
2222         {3, 1}                  /* group 4 2.4, ch   all */
2223 };
2224
2225 static s32 get_min_power_index(s32 rate_power_index, u32 band)
2226 {
2227         if (!band) {
2228                 if ((rate_power_index & 7) <= 4)
2229                         return MIN_TX_GAIN_INDEX_52GHZ_EXT;
2230         }
2231         return MIN_TX_GAIN_INDEX;
2232 }
2233
2234 struct gain_entry {
2235         u8 dsp;
2236         u8 radio;
2237 };
2238
2239 static const struct gain_entry gain_table[2][108] = {
2240         /* 5.2GHz power gain index table */
2241         {
2242          {123, 0x3F},           /* highest txpower */
2243          {117, 0x3F},
2244          {110, 0x3F},
2245          {104, 0x3F},
2246          {98, 0x3F},
2247          {110, 0x3E},
2248          {104, 0x3E},
2249          {98, 0x3E},
2250          {110, 0x3D},
2251          {104, 0x3D},
2252          {98, 0x3D},
2253          {110, 0x3C},
2254          {104, 0x3C},
2255          {98, 0x3C},
2256          {110, 0x3B},
2257          {104, 0x3B},
2258          {98, 0x3B},
2259          {110, 0x3A},
2260          {104, 0x3A},
2261          {98, 0x3A},
2262          {110, 0x39},
2263          {104, 0x39},
2264          {98, 0x39},
2265          {110, 0x38},
2266          {104, 0x38},
2267          {98, 0x38},
2268          {110, 0x37},
2269          {104, 0x37},
2270          {98, 0x37},
2271          {110, 0x36},
2272          {104, 0x36},
2273          {98, 0x36},
2274          {110, 0x35},
2275          {104, 0x35},
2276          {98, 0x35},
2277          {110, 0x34},
2278          {104, 0x34},
2279          {98, 0x34},
2280          {110, 0x33},
2281          {104, 0x33},
2282          {98, 0x33},
2283          {110, 0x32},
2284          {104, 0x32},
2285          {98, 0x32},
2286          {110, 0x31},
2287          {104, 0x31},
2288          {98, 0x31},
2289          {110, 0x30},
2290          {104, 0x30},
2291          {98, 0x30},
2292          {110, 0x25},
2293          {104, 0x25},
2294          {98, 0x25},
2295          {110, 0x24},
2296          {104, 0x24},
2297          {98, 0x24},
2298          {110, 0x23},
2299          {104, 0x23},
2300          {98, 0x23},
2301          {110, 0x22},
2302          {104, 0x18},
2303          {98, 0x18},
2304          {110, 0x17},
2305          {104, 0x17},
2306          {98, 0x17},
2307          {110, 0x16},
2308          {104, 0x16},
2309          {98, 0x16},
2310          {110, 0x15},
2311          {104, 0x15},
2312          {98, 0x15},
2313          {110, 0x14},
2314          {104, 0x14},
2315          {98, 0x14},
2316          {110, 0x13},
2317          {104, 0x13},
2318          {98, 0x13},
2319          {110, 0x12},
2320          {104, 0x08},
2321          {98, 0x08},
2322          {110, 0x07},
2323          {104, 0x07},
2324          {98, 0x07},
2325          {110, 0x06},
2326          {104, 0x06},
2327          {98, 0x06},
2328          {110, 0x05},
2329          {104, 0x05},
2330          {98, 0x05},
2331          {110, 0x04},
2332          {104, 0x04},
2333          {98, 0x04},
2334          {110, 0x03},
2335          {104, 0x03},
2336          {98, 0x03},
2337          {110, 0x02},
2338          {104, 0x02},
2339          {98, 0x02},
2340          {110, 0x01},
2341          {104, 0x01},
2342          {98, 0x01},
2343          {110, 0x00},
2344          {104, 0x00},
2345          {98, 0x00},
2346          {93, 0x00},
2347          {88, 0x00},
2348          {83, 0x00},
2349          {78, 0x00},
2350          },
2351         /* 2.4GHz power gain index table */
2352         {
2353          {110, 0x3f},           /* highest txpower */
2354          {104, 0x3f},
2355          {98, 0x3f},
2356          {110, 0x3e},
2357          {104, 0x3e},
2358          {98, 0x3e},
2359          {110, 0x3d},
2360          {104, 0x3d},
2361          {98, 0x3d},
2362          {110, 0x3c},
2363          {104, 0x3c},
2364          {98, 0x3c},
2365          {110, 0x3b},
2366          {104, 0x3b},
2367          {98, 0x3b},
2368          {110, 0x3a},
2369          {104, 0x3a},
2370          {98, 0x3a},
2371          {110, 0x39},
2372          {104, 0x39},
2373          {98, 0x39},
2374          {110, 0x38},
2375          {104, 0x38},
2376          {98, 0x38},
2377          {110, 0x37},
2378          {104, 0x37},
2379          {98, 0x37},
2380          {110, 0x36},
2381          {104, 0x36},
2382          {98, 0x36},
2383          {110, 0x35},
2384          {104, 0x35},
2385          {98, 0x35},
2386          {110, 0x34},
2387          {104, 0x34},
2388          {98, 0x34},
2389          {110, 0x33},
2390          {104, 0x33},
2391          {98, 0x33},
2392          {110, 0x32},
2393          {104, 0x32},
2394          {98, 0x32},
2395          {110, 0x31},
2396          {104, 0x31},
2397          {98, 0x31},
2398          {110, 0x30},
2399          {104, 0x30},
2400          {98, 0x30},
2401          {110, 0x6},
2402          {104, 0x6},
2403          {98, 0x6},
2404          {110, 0x5},
2405          {104, 0x5},
2406          {98, 0x5},
2407          {110, 0x4},
2408          {104, 0x4},
2409          {98, 0x4},
2410          {110, 0x3},
2411          {104, 0x3},
2412          {98, 0x3},
2413          {110, 0x2},
2414          {104, 0x2},
2415          {98, 0x2},
2416          {110, 0x1},
2417          {104, 0x1},
2418          {98, 0x1},
2419          {110, 0x0},
2420          {104, 0x0},
2421          {98, 0x0},
2422          {97, 0},
2423          {96, 0},
2424          {95, 0},
2425          {94, 0},
2426          {93, 0},
2427          {92, 0},
2428          {91, 0},
2429          {90, 0},
2430          {89, 0},
2431          {88, 0},
2432          {87, 0},
2433          {86, 0},
2434          {85, 0},
2435          {84, 0},
2436          {83, 0},
2437          {82, 0},
2438          {81, 0},
2439          {80, 0},
2440          {79, 0},
2441          {78, 0},
2442          {77, 0},
2443          {76, 0},
2444          {75, 0},
2445          {74, 0},
2446          {73, 0},
2447          {72, 0},
2448          {71, 0},
2449          {70, 0},
2450          {69, 0},
2451          {68, 0},
2452          {67, 0},
2453          {66, 0},
2454          {65, 0},
2455          {64, 0},
2456          {63, 0},
2457          {62, 0},
2458          {61, 0},
2459          {60, 0},
2460          {59, 0},
2461          }
2462 };
2463
2464 static int iwl4965_fill_txpower_tbl(struct iwl_priv *priv, u8 band, u16 channel,
2465                                     u8 is_fat, u8 ctrl_chan_high,
2466                                     struct iwl4965_tx_power_db *tx_power_tbl)
2467 {
2468         u8 saturation_power;
2469         s32 target_power;
2470         s32 user_target_power;
2471         s32 power_limit;
2472         s32 current_temp;
2473         s32 reg_limit;
2474         s32 current_regulatory;
2475         s32 txatten_grp = CALIB_CH_GROUP_MAX;
2476         int i;
2477         int c;
2478         const struct iwl_channel_info *ch_info = NULL;
2479         struct iwl4965_eeprom_calib_ch_info ch_eeprom_info;
2480         const struct iwl4965_eeprom_calib_measure *measurement;
2481         s16 voltage;
2482         s32 init_voltage;
2483         s32 voltage_compensation;
2484         s32 degrees_per_05db_num;
2485         s32 degrees_per_05db_denom;
2486         s32 factory_temp;
2487         s32 temperature_comp[2];
2488         s32 factory_gain_index[2];
2489         s32 factory_actual_pwr[2];
2490         s32 power_index;
2491
2492         /* Sanity check requested level (dBm) */
2493         if (priv->user_txpower_limit < IWL_TX_POWER_TARGET_POWER_MIN) {
2494                 IWL_WARNING("Requested user TXPOWER %d below limit.\n",
2495                             priv->user_txpower_limit);
2496                 return -EINVAL;
2497         }
2498         if (priv->user_txpower_limit > IWL_TX_POWER_TARGET_POWER_MAX) {
2499                 IWL_WARNING("Requested user TXPOWER %d above limit.\n",
2500                             priv->user_txpower_limit);
2501                 return -EINVAL;
2502         }
2503
2504         /* user_txpower_limit is in dBm, convert to half-dBm (half-dB units
2505          *   are used for indexing into txpower table) */
2506         user_target_power = 2 * priv->user_txpower_limit;
2507
2508         /* Get current (RXON) channel, band, width */
2509         ch_info =
2510                 iwl4965_get_channel_txpower_info(priv, priv->band, channel);
2511
2512         IWL_DEBUG_TXPOWER("chan %d band %d is_fat %d\n", channel, band,
2513                           is_fat);
2514
2515         if (!ch_info)
2516                 return -EINVAL;
2517
2518         /* get txatten group, used to select 1) thermal txpower adjustment
2519          *   and 2) mimo txpower balance between Tx chains. */
2520         txatten_grp = iwl4965_get_tx_atten_grp(channel);
2521         if (txatten_grp < 0)
2522                 return -EINVAL;
2523
2524         IWL_DEBUG_TXPOWER("channel %d belongs to txatten group %d\n",
2525                           channel, txatten_grp);
2526
2527         if (is_fat) {
2528                 if (ctrl_chan_high)
2529                         channel -= 2;
2530                 else
2531                         channel += 2;
2532         }
2533
2534         /* hardware txpower limits ...
2535          * saturation (clipping distortion) txpowers are in half-dBm */
2536         if (band)
2537                 saturation_power = priv->eeprom.calib_info.saturation_power24;
2538         else
2539                 saturation_power = priv->eeprom.calib_info.saturation_power52;
2540
2541         if (saturation_power < IWL_TX_POWER_SATURATION_MIN ||
2542             saturation_power > IWL_TX_POWER_SATURATION_MAX) {
2543                 if (band)
2544                         saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_24;
2545                 else
2546                         saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_52;
2547         }
2548
2549         /* regulatory txpower limits ... reg_limit values are in half-dBm,
2550          *   max_power_avg values are in dBm, convert * 2 */
2551         if (is_fat)
2552                 reg_limit = ch_info->fat_max_power_avg * 2;
2553         else
2554                 reg_limit = ch_info->max_power_avg * 2;
2555
2556         if ((reg_limit < IWL_TX_POWER_REGULATORY_MIN) ||
2557             (reg_limit > IWL_TX_POWER_REGULATORY_MAX)) {
2558                 if (band)
2559                         reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_24;
2560                 else
2561                         reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_52;
2562         }
2563
2564         /* Interpolate txpower calibration values for this channel,
2565          *   based on factory calibration tests on spaced channels. */
2566         iwl4965_interpolate_chan(priv, channel, &ch_eeprom_info);
2567
2568         /* calculate tx gain adjustment based on power supply voltage */
2569         voltage = priv->eeprom.calib_info.voltage;
2570         init_voltage = (s32)le32_to_cpu(priv->card_alive_init.voltage);
2571         voltage_compensation =
2572             iwl4965_get_voltage_compensation(voltage, init_voltage);
2573
2574         IWL_DEBUG_TXPOWER("curr volt %d eeprom volt %d volt comp %d\n",
2575                           init_voltage,
2576                           voltage, voltage_compensation);
2577
2578         /* get current temperature (Celsius) */
2579         current_temp = max(priv->temperature, IWL_TX_POWER_TEMPERATURE_MIN);
2580         current_temp = min(priv->temperature, IWL_TX_POWER_TEMPERATURE_MAX);
2581         current_temp = KELVIN_TO_CELSIUS(current_temp);
2582
2583         /* select thermal txpower adjustment params, based on channel group
2584          *   (same frequency group used for mimo txatten adjustment) */
2585         degrees_per_05db_num =
2586             tx_power_cmp_tble[txatten_grp].degrees_per_05db_a;
2587         degrees_per_05db_denom =
2588             tx_power_cmp_tble[txatten_grp].degrees_per_05db_a_denom;
2589
2590         /* get per-chain txpower values from factory measurements */
2591         for (c = 0; c < 2; c++) {
2592                 measurement = &ch_eeprom_info.measurements[c][1];
2593
2594                 /* txgain adjustment (in half-dB steps) based on difference
2595                  *   between factory and current temperature */
2596                 factory_temp = measurement->temperature;
2597                 iwl4965_math_div_round((current_temp - factory_temp) *
2598                                        degrees_per_05db_denom,
2599                                        degrees_per_05db_num,
2600                                        &temperature_comp[c]);
2601
2602                 factory_gain_index[c] = measurement->gain_idx;
2603                 factory_actual_pwr[c] = measurement->actual_pow;
2604
2605                 IWL_DEBUG_TXPOWER("chain = %d\n", c);
2606                 IWL_DEBUG_TXPOWER("fctry tmp %d, "
2607                                   "curr tmp %d, comp %d steps\n",
2608                                   factory_temp, current_temp,
2609                                   temperature_comp[c]);
2610
2611                 IWL_DEBUG_TXPOWER("fctry idx %d, fctry pwr %d\n",
2612                                   factory_gain_index[c],
2613                                   factory_actual_pwr[c]);
2614         }
2615
2616         /* for each of 33 bit-rates (including 1 for CCK) */
2617         for (i = 0; i < POWER_TABLE_NUM_ENTRIES; i++) {
2618                 u8 is_mimo_rate;
2619                 union iwl4965_tx_power_dual_stream tx_power;
2620
2621                 /* for mimo, reduce each chain's txpower by half
2622                  * (3dB, 6 steps), so total output power is regulatory
2623                  * compliant. */
2624                 if (i & 0x8) {
2625                         current_regulatory = reg_limit -
2626                             IWL_TX_POWER_MIMO_REGULATORY_COMPENSATION;
2627                         is_mimo_rate = 1;
2628                 } else {
2629                         current_regulatory = reg_limit;
2630                         is_mimo_rate = 0;
2631                 }
2632
2633                 /* find txpower limit, either hardware or regulatory */
2634                 power_limit = saturation_power - back_off_table[i];
2635                 if (power_limit > current_regulatory)
2636                         power_limit = current_regulatory;
2637
2638                 /* reduce user's txpower request if necessary
2639                  * for this rate on this channel */
2640                 target_power = user_target_power;
2641                 if (target_power > power_limit)
2642                         target_power = power_limit;
2643
2644                 IWL_DEBUG_TXPOWER("rate %d sat %d reg %d usr %d tgt %d\n",
2645                                   i, saturation_power - back_off_table[i],
2646                                   current_regulatory, user_target_power,
2647                                   target_power);
2648
2649                 /* for each of 2 Tx chains (radio transmitters) */
2650                 for (c = 0; c < 2; c++) {
2651                         s32 atten_value;
2652
2653                         if (is_mimo_rate)
2654                                 atten_value =
2655                                     (s32)le32_to_cpu(priv->card_alive_init.
2656                                     tx_atten[txatten_grp][c]);
2657                         else
2658                                 atten_value = 0;
2659
2660                         /* calculate index; higher index means lower txpower */
2661                         power_index = (u8) (factory_gain_index[c] -
2662                                             (target_power -
2663                                              factory_actual_pwr[c]) -
2664                                             temperature_comp[c] -
2665                                             voltage_compensation +
2666                                             atten_value);
2667
2668 /*                      IWL_DEBUG_TXPOWER("calculated txpower index %d\n",
2669                                                 power_index); */
2670
2671                         if (power_index < get_min_power_index(i, band))
2672                                 power_index = get_min_power_index(i, band);
2673
2674                         /* adjust 5 GHz index to support negative indexes */
2675                         if (!band)
2676                                 power_index += 9;
2677
2678                         /* CCK, rate 32, reduce txpower for CCK */
2679                         if (i == POWER_TABLE_CCK_ENTRY)
2680                                 power_index +=
2681                                     IWL_TX_POWER_CCK_COMPENSATION_C_STEP;
2682
2683                         /* stay within the table! */
2684                         if (power_index > 107) {
2685                                 IWL_WARNING("txpower index %d > 107\n",
2686                                             power_index);
2687                                 power_index = 107;
2688                         }
2689                         if (power_index < 0) {
2690                                 IWL_WARNING("txpower index %d < 0\n",
2691                                             power_index);
2692                                 power_index = 0;
2693                         }
2694
2695                         /* fill txpower command for this rate/chain */
2696                         tx_power.s.radio_tx_gain[c] =
2697                                 gain_table[band][power_index].radio;
2698                         tx_power.s.dsp_predis_atten[c] =
2699                                 gain_table[band][power_index].dsp;
2700
2701                         IWL_DEBUG_TXPOWER("chain %d mimo %d index %d "
2702                                           "gain 0x%02x dsp %d\n",
2703                                           c, atten_value, power_index,
2704                                         tx_power.s.radio_tx_gain[c],
2705                                         tx_power.s.dsp_predis_atten[c]);
2706                 }/* for each chain */
2707
2708                 tx_power_tbl->power_tbl[i].dw = cpu_to_le32(tx_power.dw);
2709
2710         }/* for each rate */
2711
2712         return 0;
2713 }
2714
2715 /**
2716  * iwl4965_hw_reg_send_txpower - Configure the TXPOWER level user limit
2717  *
2718  * Uses the active RXON for channel, band, and characteristics (fat, high)
2719  * The power limit is taken from priv->user_txpower_limit.
2720  */
2721 int iwl4965_hw_reg_send_txpower(struct iwl_priv *priv)
2722 {
2723         struct iwl4965_txpowertable_cmd cmd = { 0 };
2724         int ret;
2725         u8 band = 0;
2726         u8 is_fat = 0;
2727         u8 ctrl_chan_high = 0;
2728
2729         if (test_bit(STATUS_SCANNING, &priv->status)) {
2730                 /* If this gets hit a lot, switch it to a BUG() and catch
2731                  * the stack trace to find out who is calling this during
2732                  * a scan. */
2733                 IWL_WARNING("TX Power requested while scanning!\n");
2734                 return -EAGAIN;
2735         }
2736
2737         band = priv->band == IEEE80211_BAND_2GHZ;
2738
2739         is_fat =  is_fat_channel(priv->active_rxon.flags);
2740
2741         if (is_fat &&
2742             (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
2743                 ctrl_chan_high = 1;
2744
2745         cmd.band = band;
2746         cmd.channel = priv->active_rxon.channel;
2747
2748         ret = iwl4965_fill_txpower_tbl(priv, band,
2749                                 le16_to_cpu(priv->active_rxon.channel),
2750                                 is_fat, ctrl_chan_high, &cmd.tx_power);
2751         if (ret)
2752                 goto out;
2753
2754         ret = iwl_send_cmd_pdu(priv, REPLY_TX_PWR_TABLE_CMD, sizeof(cmd), &cmd);
2755
2756 out:
2757         return ret;
2758 }
2759
2760 int iwl4965_hw_channel_switch(struct iwl_priv *priv, u16 channel)
2761 {
2762         int rc;
2763         u8 band = 0;
2764         u8 is_fat = 0;
2765         u8 ctrl_chan_high = 0;
2766         struct iwl4965_channel_switch_cmd cmd = { 0 };
2767         const struct iwl_channel_info *ch_info;
2768
2769         band = priv->band == IEEE80211_BAND_2GHZ;
2770
2771         ch_info = iwl_get_channel_info(priv, priv->band, channel);
2772
2773         is_fat = is_fat_channel(priv->staging_rxon.flags);
2774
2775         if (is_fat &&
2776             (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
2777                 ctrl_chan_high = 1;
2778
2779         cmd.band = band;
2780         cmd.expect_beacon = 0;
2781         cmd.channel = cpu_to_le16(channel);
2782         cmd.rxon_flags = priv->active_rxon.flags;
2783         cmd.rxon_filter_flags = priv->active_rxon.filter_flags;
2784         cmd.switch_time = cpu_to_le32(priv->ucode_beacon_time);
2785         if (ch_info)
2786                 cmd.expect_beacon = is_channel_radar(ch_info);
2787         else
2788                 cmd.expect_beacon = 1;
2789
2790         rc = iwl4965_fill_txpower_tbl(priv, band, channel, is_fat,
2791                                       ctrl_chan_high, &cmd.tx_power);
2792         if (rc) {
2793                 IWL_DEBUG_11H("error:%d  fill txpower_tbl\n", rc);
2794                 return rc;
2795         }
2796
2797         rc = iwl_send_cmd_pdu(priv, REPLY_CHANNEL_SWITCH, sizeof(cmd), &cmd);
2798         return rc;
2799 }
2800
2801 #define RTS_HCCA_RETRY_LIMIT            3
2802 #define RTS_DFAULT_RETRY_LIMIT          60
2803
2804 void iwl4965_hw_build_tx_cmd_rate(struct iwl_priv *priv,
2805                               struct iwl_cmd *cmd,
2806                               struct ieee80211_tx_control *ctrl,
2807                               struct ieee80211_hdr *hdr, int sta_id,
2808                               int is_hcca)
2809 {
2810         struct iwl4965_tx_cmd *tx = &cmd->cmd.tx;
2811         u8 rts_retry_limit = 0;
2812         u8 data_retry_limit = 0;
2813         u16 fc = le16_to_cpu(hdr->frame_control);
2814         u8 rate_plcp;
2815         u16 rate_flags = 0;
2816         int rate_idx = min(ctrl->tx_rate->hw_value & 0xffff, IWL_RATE_COUNT - 1);
2817
2818         rate_plcp = iwl4965_rates[rate_idx].plcp;
2819
2820         rts_retry_limit = (is_hcca) ?
2821             RTS_HCCA_RETRY_LIMIT : RTS_DFAULT_RETRY_LIMIT;
2822
2823         if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
2824                 rate_flags |= RATE_MCS_CCK_MSK;
2825
2826
2827         if (ieee80211_is_probe_response(fc)) {
2828                 data_retry_limit = 3;
2829                 if (data_retry_limit < rts_retry_limit)
2830                         rts_retry_limit = data_retry_limit;
2831         } else
2832                 data_retry_limit = IWL_DEFAULT_TX_RETRY;
2833
2834         if (priv->data_retry_limit != -1)
2835                 data_retry_limit = priv->data_retry_limit;
2836
2837
2838         if (ieee80211_is_data(fc)) {
2839                 tx->initial_rate_index = 0;
2840                 tx->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
2841         } else {
2842                 switch (fc & IEEE80211_FCTL_STYPE) {
2843                 case IEEE80211_STYPE_AUTH:
2844                 case IEEE80211_STYPE_DEAUTH:
2845                 case IEEE80211_STYPE_ASSOC_REQ:
2846                 case IEEE80211_STYPE_REASSOC_REQ:
2847                         if (tx->tx_flags & TX_CMD_FLG_RTS_MSK) {
2848                                 tx->tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2849                                 tx->tx_flags |= TX_CMD_FLG_CTS_MSK;
2850                         }
2851                         break;
2852                 default:
2853                         break;
2854                 }
2855
2856                 /* Alternate between antenna A and B for successive frames */
2857                 if (priv->use_ant_b_for_management_frame) {
2858                         priv->use_ant_b_for_management_frame = 0;
2859                         rate_flags |= RATE_MCS_ANT_B_MSK;
2860                 } else {
2861                         priv->use_ant_b_for_management_frame = 1;
2862                         rate_flags |= RATE_MCS_ANT_A_MSK;
2863                 }
2864         }
2865
2866         tx->rts_retry_limit = rts_retry_limit;
2867         tx->data_retry_limit = data_retry_limit;
2868         tx->rate_n_flags = iwl4965_hw_set_rate_n_flags(rate_plcp, rate_flags);
2869 }
2870
2871 int iwl4965_hw_get_rx_read(struct iwl_priv *priv)
2872 {
2873         struct iwl4965_shared *shared_data = priv->hw_setting.shared_virt;
2874
2875         return IWL_GET_BITS(*shared_data, rb_closed_stts_rb_num);
2876 }
2877
2878 int iwl4965_hw_get_temperature(struct iwl_priv *priv)
2879 {
2880         return priv->temperature;
2881 }
2882
2883 unsigned int iwl4965_hw_get_beacon_cmd(struct iwl_priv *priv,
2884                           struct iwl4965_frame *frame, u8 rate)
2885 {
2886         struct iwl4965_tx_beacon_cmd *tx_beacon_cmd;
2887         unsigned int frame_size;
2888
2889         tx_beacon_cmd = &frame->u.beacon;
2890         memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
2891
2892         tx_beacon_cmd->tx.sta_id = priv->hw_setting.bcast_sta_id;
2893         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2894
2895         frame_size = iwl4965_fill_beacon_frame(priv,
2896                                 tx_beacon_cmd->frame,
2897                                 iwl4965_broadcast_addr,
2898                                 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
2899
2900         BUG_ON(frame_size > MAX_MPDU_SIZE);
2901         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
2902
2903         if ((rate == IWL_RATE_1M_PLCP) || (rate >= IWL_RATE_2M_PLCP))
2904                 tx_beacon_cmd->tx.rate_n_flags =
2905                         iwl4965_hw_set_rate_n_flags(rate, RATE_MCS_CCK_MSK);
2906         else
2907                 tx_beacon_cmd->tx.rate_n_flags =
2908                         iwl4965_hw_set_rate_n_flags(rate, 0);
2909
2910         tx_beacon_cmd->tx.tx_flags = (TX_CMD_FLG_SEQ_CTL_MSK |
2911                                 TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK);
2912         return (sizeof(*tx_beacon_cmd) + frame_size);
2913 }
2914
2915 /*
2916  * Tell 4965 where to find circular buffer of Tx Frame Descriptors for
2917  * given Tx queue, and enable the DMA channel used for that queue.
2918  *
2919  * 4965 supports up to 16 Tx queues in DRAM, mapped to up to 8 Tx DMA
2920  * channels supported in hardware.
2921  */
2922 int iwl4965_hw_tx_queue_init(struct iwl_priv *priv, struct iwl4965_tx_queue *txq)
2923 {
2924         int rc;
2925         unsigned long flags;
2926         int txq_id = txq->q.id;
2927
2928         spin_lock_irqsave(&priv->lock, flags);
2929         rc = iwl_grab_nic_access(priv);
2930         if (rc) {
2931                 spin_unlock_irqrestore(&priv->lock, flags);
2932                 return rc;
2933         }
2934
2935         /* Circular buffer (TFD queue in DRAM) physical base address */
2936         iwl_write_direct32(priv, FH_MEM_CBBC_QUEUE(txq_id),
2937                              txq->q.dma_addr >> 8);
2938
2939         /* Enable DMA channel, using same id as for TFD queue */
2940         iwl_write_direct32(
2941                 priv, IWL_FH_TCSR_CHNL_TX_CONFIG_REG(txq_id),
2942                 IWL_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE |
2943                 IWL_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE_VAL);
2944         iwl_release_nic_access(priv);
2945         spin_unlock_irqrestore(&priv->lock, flags);
2946
2947         return 0;
2948 }
2949
2950 int iwl4965_hw_txq_attach_buf_to_tfd(struct iwl_priv *priv, void *ptr,
2951                                  dma_addr_t addr, u16 len)
2952 {
2953         int index, is_odd;
2954         struct iwl4965_tfd_frame *tfd = ptr;
2955         u32 num_tbs = IWL_GET_BITS(*tfd, num_tbs);
2956
2957         /* Each TFD can point to a maximum 20 Tx buffers */
2958         if ((num_tbs >= MAX_NUM_OF_TBS) || (num_tbs < 0)) {
2959                 IWL_ERROR("Error can not send more than %d chunks\n",
2960                           MAX_NUM_OF_TBS);
2961                 return -EINVAL;
2962         }
2963
2964         index = num_tbs / 2;
2965         is_odd = num_tbs & 0x1;
2966
2967         if (!is_odd) {
2968                 tfd->pa[index].tb1_addr = cpu_to_le32(addr);
2969                 IWL_SET_BITS(tfd->pa[index], tb1_addr_hi,
2970                              iwl_get_dma_hi_address(addr));
2971                 IWL_SET_BITS(tfd->pa[index], tb1_len, len);
2972         } else {
2973                 IWL_SET_BITS(tfd->pa[index], tb2_addr_lo16,
2974                              (u32) (addr & 0xffff));
2975                 IWL_SET_BITS(tfd->pa[index], tb2_addr_hi20, addr >> 16);
2976                 IWL_SET_BITS(tfd->pa[index], tb2_len, len);
2977         }
2978
2979         IWL_SET_BITS(*tfd, num_tbs, num_tbs + 1);
2980
2981         return 0;
2982 }
2983
2984 static void iwl4965_hw_card_show_info(struct iwl_priv *priv)
2985 {
2986         u16 hw_version = priv->eeprom.board_revision_4965;
2987
2988         IWL_DEBUG_INFO("4965ABGN HW Version %u.%u.%u\n",
2989                        ((hw_version >> 8) & 0x0F),
2990                        ((hw_version >> 8) >> 4), (hw_version & 0x00FF));
2991
2992         IWL_DEBUG_INFO("4965ABGN PBA Number %.16s\n",
2993                        priv->eeprom.board_pba_number_4965);
2994 }
2995
2996 #define IWL_TX_CRC_SIZE         4
2997 #define IWL_TX_DELIMITER_SIZE   4
2998
2999 /**
3000  * iwl4965_tx_queue_update_wr_ptr - Set up entry in Tx byte-count array
3001  */
3002 int iwl4965_tx_queue_update_wr_ptr(struct iwl_priv *priv,
3003                                    struct iwl4965_tx_queue *txq, u16 byte_cnt)
3004 {
3005         int len;
3006         int txq_id = txq->q.id;
3007         struct iwl4965_shared *shared_data = priv->hw_setting.shared_virt;
3008
3009         if (txq->need_update == 0)
3010                 return 0;
3011
3012         len = byte_cnt + IWL_TX_CRC_SIZE + IWL_TX_DELIMITER_SIZE;
3013
3014         /* Set up byte count within first 256 entries */
3015         IWL_SET_BITS16(shared_data->queues_byte_cnt_tbls[txq_id].
3016                        tfd_offset[txq->q.write_ptr], byte_cnt, len);
3017
3018         /* If within first 64 entries, duplicate at end */
3019         if (txq->q.write_ptr < IWL4965_MAX_WIN_SIZE)
3020                 IWL_SET_BITS16(shared_data->queues_byte_cnt_tbls[txq_id].
3021                         tfd_offset[IWL4965_QUEUE_SIZE + txq->q.write_ptr],
3022                         byte_cnt, len);
3023
3024         return 0;
3025 }
3026
3027 /**
3028  * iwl4965_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
3029  *
3030  * Selects how many and which Rx receivers/antennas/chains to use.
3031  * This should not be used for scan command ... it puts data in wrong place.
3032  */
3033 void iwl4965_set_rxon_chain(struct iwl_priv *priv)
3034 {
3035         u8 is_single = is_single_stream(priv);
3036         u8 idle_state, rx_state;
3037
3038         priv->staging_rxon.rx_chain = 0;
3039         rx_state = idle_state = 3;
3040
3041         /* Tell uCode which antennas are actually connected.
3042          * Before first association, we assume all antennas are connected.
3043          * Just after first association, iwl4965_noise_calibration()
3044          *    checks which antennas actually *are* connected. */
3045         priv->staging_rxon.rx_chain |=
3046             cpu_to_le16(priv->valid_antenna << RXON_RX_CHAIN_VALID_POS);
3047
3048         /* How many receivers should we use? */
3049         iwl4965_get_rx_chain_counter(priv, &idle_state, &rx_state);
3050         priv->staging_rxon.rx_chain |=
3051                 cpu_to_le16(rx_state << RXON_RX_CHAIN_MIMO_CNT_POS);
3052         priv->staging_rxon.rx_chain |=
3053                 cpu_to_le16(idle_state << RXON_RX_CHAIN_CNT_POS);
3054
3055         if (!is_single && (rx_state >= 2) &&
3056             !test_bit(STATUS_POWER_PMI, &priv->status))
3057                 priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
3058         else
3059                 priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
3060
3061         IWL_DEBUG_ASSOC("rx chain %X\n", priv->staging_rxon.rx_chain);
3062 }
3063
3064 /**
3065  * sign_extend - Sign extend a value using specified bit as sign-bit
3066  *
3067  * Example: sign_extend(9, 3) would return -7 as bit3 of 1001b is 1
3068  * and bit0..2 is 001b which when sign extended to 1111111111111001b is -7.
3069  *
3070  * @param oper value to sign extend
3071  * @param index 0 based bit index (0<=index<32) to sign bit
3072  */
3073 static s32 sign_extend(u32 oper, int index)
3074 {
3075         u8 shift = 31 - index;
3076
3077         return (s32)(oper << shift) >> shift;
3078 }
3079
3080 /**
3081  * iwl4965_get_temperature - return the calibrated temperature (in Kelvin)
3082  * @statistics: Provides the temperature reading from the uCode
3083  *
3084  * A return of <0 indicates bogus data in the statistics
3085  */
3086 int iwl4965_get_temperature(const struct iwl_priv *priv)
3087 {
3088         s32 temperature;
3089         s32 vt;
3090         s32 R1, R2, R3;
3091         u32 R4;
3092
3093         if (test_bit(STATUS_TEMPERATURE, &priv->status) &&
3094                 (priv->statistics.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK)) {
3095                 IWL_DEBUG_TEMP("Running FAT temperature calibration\n");
3096                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[1]);
3097                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[1]);
3098                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[1]);
3099                 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[1]);
3100         } else {
3101                 IWL_DEBUG_TEMP("Running temperature calibration\n");
3102                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[0]);
3103                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[0]);
3104                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[0]);
3105                 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[0]);
3106         }
3107
3108         /*
3109          * Temperature is only 23 bits, so sign extend out to 32.
3110          *
3111          * NOTE If we haven't received a statistics notification yet
3112          * with an updated temperature, use R4 provided to us in the
3113          * "initialize" ALIVE response.
3114          */
3115         if (!test_bit(STATUS_TEMPERATURE, &priv->status))
3116                 vt = sign_extend(R4, 23);
3117         else
3118                 vt = sign_extend(
3119                         le32_to_cpu(priv->statistics.general.temperature), 23);
3120
3121         IWL_DEBUG_TEMP("Calib values R[1-3]: %d %d %d R4: %d\n",
3122                        R1, R2, R3, vt);
3123
3124         if (R3 == R1) {
3125                 IWL_ERROR("Calibration conflict R1 == R3\n");
3126                 return -1;
3127         }
3128
3129         /* Calculate temperature in degrees Kelvin, adjust by 97%.
3130          * Add offset to center the adjustment around 0 degrees Centigrade. */
3131         temperature = TEMPERATURE_CALIB_A_VAL * (vt - R2);
3132         temperature /= (R3 - R1);
3133         temperature = (temperature * 97) / 100 +
3134             TEMPERATURE_CALIB_KELVIN_OFFSET;
3135
3136         IWL_DEBUG_TEMP("Calibrated temperature: %dK, %dC\n", temperature,
3137             KELVIN_TO_CELSIUS(temperature));
3138
3139         return temperature;
3140 }
3141
3142 /* Adjust Txpower only if temperature variance is greater than threshold. */
3143 #define IWL_TEMPERATURE_THRESHOLD   3
3144
3145 /**
3146  * iwl4965_is_temp_calib_needed - determines if new calibration is needed
3147  *
3148  * If the temperature changed has changed sufficiently, then a recalibration
3149  * is needed.
3150  *
3151  * Assumes caller will replace priv->last_temperature once calibration
3152  * executed.
3153  */
3154 static int iwl4965_is_temp_calib_needed(struct iwl_priv *priv)
3155 {
3156         int temp_diff;
3157
3158         if (!test_bit(STATUS_STATISTICS, &priv->status)) {
3159                 IWL_DEBUG_TEMP("Temperature not updated -- no statistics.\n");
3160                 return 0;
3161         }
3162
3163         temp_diff = priv->temperature - priv->last_temperature;
3164
3165         /* get absolute value */
3166         if (temp_diff < 0) {
3167                 IWL_DEBUG_POWER("Getting cooler, delta %d, \n", temp_diff);
3168                 temp_diff = -temp_diff;
3169         } else if (temp_diff == 0)
3170                 IWL_DEBUG_POWER("Same temp, \n");
3171         else
3172                 IWL_DEBUG_POWER("Getting warmer, delta %d, \n", temp_diff);
3173
3174         if (temp_diff < IWL_TEMPERATURE_THRESHOLD) {
3175                 IWL_DEBUG_POWER("Thermal txpower calib not needed\n");
3176                 return 0;
3177         }
3178
3179         IWL_DEBUG_POWER("Thermal txpower calib needed\n");
3180
3181         return 1;
3182 }
3183
3184 /* Calculate noise level, based on measurements during network silence just
3185  *   before arriving beacon.  This measurement can be done only if we know
3186  *   exactly when to expect beacons, therefore only when we're associated. */
3187 static void iwl4965_rx_calc_noise(struct iwl_priv *priv)
3188 {
3189         struct statistics_rx_non_phy *rx_info
3190                                 = &(priv->statistics.rx.general);
3191         int num_active_rx = 0;
3192         int total_silence = 0;
3193         int bcn_silence_a =
3194                 le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER;
3195         int bcn_silence_b =
3196                 le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER;
3197         int bcn_silence_c =
3198                 le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER;
3199
3200         if (bcn_silence_a) {
3201                 total_silence += bcn_silence_a;
3202                 num_active_rx++;
3203         }
3204         if (bcn_silence_b) {
3205                 total_silence += bcn_silence_b;
3206                 num_active_rx++;
3207         }
3208         if (bcn_silence_c) {
3209                 total_silence += bcn_silence_c;
3210                 num_active_rx++;
3211         }
3212
3213         /* Average among active antennas */
3214         if (num_active_rx)
3215                 priv->last_rx_noise = (total_silence / num_active_rx) - 107;
3216         else
3217                 priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
3218
3219         IWL_DEBUG_CALIB("inband silence a %u, b %u, c %u, dBm %d\n",
3220                         bcn_silence_a, bcn_silence_b, bcn_silence_c,
3221                         priv->last_rx_noise);
3222 }
3223
3224 void iwl4965_hw_rx_statistics(struct iwl_priv *priv, struct iwl4965_rx_mem_buffer *rxb)
3225 {
3226         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3227         int change;
3228         s32 temp;
3229
3230         IWL_DEBUG_RX("Statistics notification received (%d vs %d).\n",
3231                      (int)sizeof(priv->statistics), pkt->len);
3232
3233         change = ((priv->statistics.general.temperature !=
3234                    pkt->u.stats.general.temperature) ||
3235                   ((priv->statistics.flag &
3236                     STATISTICS_REPLY_FLG_FAT_MODE_MSK) !=
3237                    (pkt->u.stats.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK)));
3238
3239         memcpy(&priv->statistics, &pkt->u.stats, sizeof(priv->statistics));
3240
3241         set_bit(STATUS_STATISTICS, &priv->status);
3242
3243         /* Reschedule the statistics timer to occur in
3244          * REG_RECALIB_PERIOD seconds to ensure we get a
3245          * thermal update even if the uCode doesn't give
3246          * us one */
3247         mod_timer(&priv->statistics_periodic, jiffies +
3248                   msecs_to_jiffies(REG_RECALIB_PERIOD * 1000));
3249
3250         if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
3251             (pkt->hdr.cmd == STATISTICS_NOTIFICATION)) {
3252                 iwl4965_rx_calc_noise(priv);
3253 #ifdef CONFIG_IWL4965_SENSITIVITY
3254                 queue_work(priv->workqueue, &priv->sensitivity_work);
3255 #endif
3256         }
3257
3258         iwl_leds_background(priv);
3259
3260         /* If the hardware hasn't reported a change in
3261          * temperature then don't bother computing a
3262          * calibrated temperature value */
3263         if (!change)
3264                 return;
3265
3266         temp = iwl4965_get_temperature(priv);
3267         if (temp < 0)
3268                 return;
3269
3270         if (priv->temperature != temp) {
3271                 if (priv->temperature)
3272                         IWL_DEBUG_TEMP("Temperature changed "
3273                                        "from %dC to %dC\n",
3274                                        KELVIN_TO_CELSIUS(priv->temperature),
3275                                        KELVIN_TO_CELSIUS(temp));
3276                 else
3277                         IWL_DEBUG_TEMP("Temperature "
3278                                        "initialized to %dC\n",
3279                                        KELVIN_TO_CELSIUS(temp));
3280         }
3281
3282         priv->temperature = temp;
3283         set_bit(STATUS_TEMPERATURE, &priv->status);
3284
3285         if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
3286                      iwl4965_is_temp_calib_needed(priv))
3287                 queue_work(priv->workqueue, &priv->txpower_work);
3288 }
3289
3290 static void iwl4965_add_radiotap(struct iwl_priv *priv,
3291                                  struct sk_buff *skb,
3292                                  struct iwl4965_rx_phy_res *rx_start,
3293                                  struct ieee80211_rx_status *stats,
3294                                  u32 ampdu_status)
3295 {
3296         s8 signal = stats->ssi;
3297         s8 noise = 0;
3298         int rate = stats->rate_idx;
3299         u64 tsf = stats->mactime;
3300         __le16 phy_flags_hw = rx_start->phy_flags;
3301         struct iwl4965_rt_rx_hdr {
3302                 struct ieee80211_radiotap_header rt_hdr;
3303                 __le64 rt_tsf;          /* TSF */
3304                 u8 rt_flags;            /* radiotap packet flags */
3305                 u8 rt_rate;             /* rate in 500kb/s */
3306                 __le16 rt_channelMHz;   /* channel in MHz */
3307                 __le16 rt_chbitmask;    /* channel bitfield */
3308                 s8 rt_dbmsignal;        /* signal in dBm, kluged to signed */
3309                 s8 rt_dbmnoise;
3310                 u8 rt_antenna;          /* antenna number */
3311         } __attribute__ ((packed)) *iwl4965_rt;
3312
3313         /* TODO: We won't have enough headroom for HT frames. Fix it later. */
3314         if (skb_headroom(skb) < sizeof(*iwl4965_rt)) {
3315                 if (net_ratelimit())
3316                         printk(KERN_ERR "not enough headroom [%d] for "
3317                                "radiotap head [%zd]\n",
3318                                skb_headroom(skb), sizeof(*iwl4965_rt));
3319                 return;
3320         }
3321
3322         /* put radiotap header in front of 802.11 header and data */
3323         iwl4965_rt = (void *)skb_push(skb, sizeof(*iwl4965_rt));
3324
3325         /* initialise radiotap header */
3326         iwl4965_rt->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
3327         iwl4965_rt->rt_hdr.it_pad = 0;
3328
3329         /* total header + data */
3330         put_unaligned(cpu_to_le16(sizeof(*iwl4965_rt)),
3331                       &iwl4965_rt->rt_hdr.it_len);
3332
3333         /* Indicate all the fields we add to the radiotap header */
3334         put_unaligned(cpu_to_le32((1 << IEEE80211_RADIOTAP_TSFT) |
3335                                   (1 << IEEE80211_RADIOTAP_FLAGS) |
3336                                   (1 << IEEE80211_RADIOTAP_RATE) |
3337                                   (1 << IEEE80211_RADIOTAP_CHANNEL) |
3338                                   (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL) |
3339                                   (1 << IEEE80211_RADIOTAP_DBM_ANTNOISE) |
3340                                   (1 << IEEE80211_RADIOTAP_ANTENNA)),
3341                       &iwl4965_rt->rt_hdr.it_present);
3342
3343         /* Zero the flags, we'll add to them as we go */
3344         iwl4965_rt->rt_flags = 0;
3345
3346         put_unaligned(cpu_to_le64(tsf), &iwl4965_rt->rt_tsf);
3347
3348         iwl4965_rt->rt_dbmsignal = signal;
3349         iwl4965_rt->rt_dbmnoise = noise;
3350
3351         /* Convert the channel frequency and set the flags */
3352         put_unaligned(cpu_to_le16(stats->freq), &iwl4965_rt->rt_channelMHz);
3353         if (!(phy_flags_hw & RX_RES_PHY_FLAGS_BAND_24_MSK))
3354                 put_unaligned(cpu_to_le16(IEEE80211_CHAN_OFDM |
3355                                           IEEE80211_CHAN_5GHZ),
3356                               &iwl4965_rt->rt_chbitmask);
3357         else if (phy_flags_hw & RX_RES_PHY_FLAGS_MOD_CCK_MSK)
3358                 put_unaligned(cpu_to_le16(IEEE80211_CHAN_CCK |
3359                                           IEEE80211_CHAN_2GHZ),
3360                               &iwl4965_rt->rt_chbitmask);
3361         else    /* 802.11g */
3362                 put_unaligned(cpu_to_le16(IEEE80211_CHAN_OFDM |
3363                                           IEEE80211_CHAN_2GHZ),
3364                               &iwl4965_rt->rt_chbitmask);
3365
3366         if (rate == -1)
3367                 iwl4965_rt->rt_rate = 0;
3368         else
3369                 iwl4965_rt->rt_rate = iwl4965_rates[rate].ieee;
3370
3371         /*
3372          * "antenna number"
3373          *
3374          * It seems that the antenna field in the phy flags value
3375          * is actually a bitfield. This is undefined by radiotap,
3376          * it wants an actual antenna number but I always get "7"
3377          * for most legacy frames I receive indicating that the
3378          * same frame was received on all three RX chains.
3379          *
3380          * I think this field should be removed in favour of a
3381          * new 802.11n radiotap field "RX chains" that is defined
3382          * as a bitmask.
3383          */
3384         iwl4965_rt->rt_antenna =
3385                 le16_to_cpu(phy_flags_hw & RX_RES_PHY_FLAGS_ANTENNA_MSK) >> 4;
3386
3387         /* set the preamble flag if appropriate */
3388         if (phy_flags_hw & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
3389                 iwl4965_rt->rt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;
3390
3391         stats->flag |= RX_FLAG_RADIOTAP;
3392 }
3393
3394 static void iwl_update_rx_stats(struct iwl_priv *priv, u16 fc, u16 len)
3395 {
3396         /* 0 - mgmt, 1 - cnt, 2 - data */
3397         int idx = (fc & IEEE80211_FCTL_FTYPE) >> 2;
3398         priv->rx_stats[idx].cnt++;
3399         priv->rx_stats[idx].bytes += len;
3400 }
3401
3402 static u32 iwl4965_translate_rx_status(u32 decrypt_in)
3403 {
3404         u32 decrypt_out = 0;
3405
3406         if ((decrypt_in & RX_RES_STATUS_STATION_FOUND) ==
3407                                         RX_RES_STATUS_STATION_FOUND)
3408                 decrypt_out |= (RX_RES_STATUS_STATION_FOUND |
3409                                 RX_RES_STATUS_NO_STATION_INFO_MISMATCH);
3410
3411         decrypt_out |= (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK);
3412
3413         /* packet was not encrypted */
3414         if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
3415                                         RX_RES_STATUS_SEC_TYPE_NONE)
3416                 return decrypt_out;
3417
3418         /* packet was encrypted with unknown alg */
3419         if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
3420                                         RX_RES_STATUS_SEC_TYPE_ERR)
3421                 return decrypt_out;
3422
3423         /* decryption was not done in HW */
3424         if ((decrypt_in & RX_MPDU_RES_STATUS_DEC_DONE_MSK) !=
3425                                         RX_MPDU_RES_STATUS_DEC_DONE_MSK)
3426                 return decrypt_out;
3427
3428         switch (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) {
3429
3430         case RX_RES_STATUS_SEC_TYPE_CCMP:
3431                 /* alg is CCM: check MIC only */
3432                 if (!(decrypt_in & RX_MPDU_RES_STATUS_MIC_OK))
3433                         /* Bad MIC */
3434                         decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
3435                 else
3436                         decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
3437
3438                 break;
3439
3440         case RX_RES_STATUS_SEC_TYPE_TKIP:
3441                 if (!(decrypt_in & RX_MPDU_RES_STATUS_TTAK_OK)) {
3442                         /* Bad TTAK */
3443                         decrypt_out |= RX_RES_STATUS_BAD_KEY_TTAK;
3444                         break;
3445                 }
3446                 /* fall through if TTAK OK */
3447         default:
3448                 if (!(decrypt_in & RX_MPDU_RES_STATUS_ICV_OK))
3449                         decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
3450                 else
3451                         decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
3452                 break;
3453         };
3454
3455         IWL_DEBUG_RX("decrypt_in:0x%x  decrypt_out = 0x%x\n",
3456                                         decrypt_in, decrypt_out);
3457
3458         return decrypt_out;
3459 }
3460
3461 static void iwl4965_handle_data_packet(struct iwl_priv *priv, int is_data,
3462                                        int include_phy,
3463                                        struct iwl4965_rx_mem_buffer *rxb,
3464                                        struct ieee80211_rx_status *stats)
3465 {
3466         struct iwl4965_rx_packet *pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
3467         struct iwl4965_rx_phy_res *rx_start = (include_phy) ?
3468             (struct iwl4965_rx_phy_res *)&(pkt->u.raw[0]) : NULL;
3469         struct ieee80211_hdr *hdr;
3470         u16 len;
3471         __le32 *rx_end;
3472         unsigned int skblen;
3473         u32 ampdu_status;
3474         u32 ampdu_status_legacy;
3475
3476         if (!include_phy && priv->last_phy_res[0])
3477                 rx_start = (struct iwl4965_rx_phy_res *)&priv->last_phy_res[1];
3478
3479         if (!rx_start) {
3480                 IWL_ERROR("MPDU frame without a PHY data\n");
3481                 return;
3482         }
3483         if (include_phy) {
3484                 hdr = (struct ieee80211_hdr *)((u8 *) & rx_start[1] +
3485                                                rx_start->cfg_phy_cnt);
3486
3487                 len = le16_to_cpu(rx_start->byte_count);
3488
3489                 rx_end = (__le32 *) ((u8 *) & pkt->u.raw[0] +
3490                                   sizeof(struct iwl4965_rx_phy_res) +
3491                                   rx_start->cfg_phy_cnt + len);
3492
3493         } else {
3494                 struct iwl4965_rx_mpdu_res_start *amsdu =
3495                     (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw;
3496
3497                 hdr = (struct ieee80211_hdr *)(pkt->u.raw +
3498                                sizeof(struct iwl4965_rx_mpdu_res_start));
3499                 len =  le16_to_cpu(amsdu->byte_count);
3500                 rx_start->byte_count = amsdu->byte_count;
3501                 rx_end = (__le32 *) (((u8 *) hdr) + len);
3502         }
3503         if (len > priv->hw_setting.max_pkt_size || len < 16) {
3504                 IWL_WARNING("byte count out of range [16,4K] : %d\n", len);
3505                 return;
3506         }
3507
3508         ampdu_status = le32_to_cpu(*rx_end);
3509         skblen = ((u8 *) rx_end - (u8 *) & pkt->u.raw[0]) + sizeof(u32);
3510
3511         if (!include_phy) {
3512                 /* New status scheme, need to translate */
3513                 ampdu_status_legacy = ampdu_status;
3514                 ampdu_status = iwl4965_translate_rx_status(ampdu_status);
3515         }
3516
3517         /* start from MAC */
3518         skb_reserve(rxb->skb, (void *)hdr - (void *)pkt);
3519         skb_put(rxb->skb, len); /* end where data ends */
3520
3521         /* We only process data packets if the interface is open */
3522         if (unlikely(!priv->is_open)) {
3523                 IWL_DEBUG_DROP_LIMIT
3524                     ("Dropping packet while interface is not open.\n");
3525                 return;
3526         }
3527
3528         stats->flag = 0;
3529         hdr = (struct ieee80211_hdr *)rxb->skb->data;
3530
3531         if (priv->cfg->mod_params->hw_crypto)
3532                 iwl4965_set_decrypted_flag(priv, rxb->skb, ampdu_status, stats);
3533
3534         if (priv->add_radiotap)
3535                 iwl4965_add_radiotap(priv, rxb->skb, rx_start, stats, ampdu_status);
3536
3537         iwl_update_rx_stats(priv, le16_to_cpu(hdr->frame_control), len);
3538         ieee80211_rx_irqsafe(priv->hw, rxb->skb, stats);
3539         priv->alloc_rxb_skb--;
3540         rxb->skb = NULL;
3541 }
3542
3543 /* Calc max signal level (dBm) among 3 possible receivers */
3544 static int iwl4965_calc_rssi(struct iwl4965_rx_phy_res *rx_resp)
3545 {
3546         /* data from PHY/DSP regarding signal strength, etc.,
3547          *   contents are always there, not configurable by host.  */
3548         struct iwl4965_rx_non_cfg_phy *ncphy =
3549             (struct iwl4965_rx_non_cfg_phy *)rx_resp->non_cfg_phy;
3550         u32 agc = (le16_to_cpu(ncphy->agc_info) & IWL_AGC_DB_MASK)
3551                         >> IWL_AGC_DB_POS;
3552
3553         u32 valid_antennae =
3554             (le16_to_cpu(rx_resp->phy_flags) & RX_PHY_FLAGS_ANTENNAE_MASK)
3555                         >> RX_PHY_FLAGS_ANTENNAE_OFFSET;
3556         u8 max_rssi = 0;
3557         u32 i;
3558
3559         /* Find max rssi among 3 possible receivers.
3560          * These values are measured by the digital signal processor (DSP).
3561          * They should stay fairly constant even as the signal strength varies,
3562          *   if the radio's automatic gain control (AGC) is working right.
3563          * AGC value (see below) will provide the "interesting" info. */
3564         for (i = 0; i < 3; i++)
3565                 if (valid_antennae & (1 << i))
3566                         max_rssi = max(ncphy->rssi_info[i << 1], max_rssi);
3567
3568         IWL_DEBUG_STATS("Rssi In A %d B %d C %d Max %d AGC dB %d\n",
3569                 ncphy->rssi_info[0], ncphy->rssi_info[2], ncphy->rssi_info[4],
3570                 max_rssi, agc);
3571
3572         /* dBm = max_rssi dB - agc dB - constant.
3573          * Higher AGC (higher radio gain) means lower signal. */
3574         return (max_rssi - agc - IWL_RSSI_OFFSET);
3575 }
3576
3577 #ifdef CONFIG_IWL4965_HT
3578
3579 /* Parsed Information Elements */
3580 struct ieee802_11_elems {
3581         u8 *ds_params;
3582         u8 ds_params_len;
3583         u8 *tim;
3584         u8 tim_len;
3585         u8 *ibss_params;
3586         u8 ibss_params_len;
3587         u8 *erp_info;
3588         u8 erp_info_len;
3589         u8 *ht_cap_param;
3590         u8 ht_cap_param_len;
3591         u8 *ht_extra_param;
3592         u8 ht_extra_param_len;
3593 };
3594
3595 static int parse_elems(u8 *start, size_t len, struct ieee802_11_elems *elems)
3596 {
3597         size_t left = len;
3598         u8 *pos = start;
3599         int unknown = 0;
3600
3601         memset(elems, 0, sizeof(*elems));
3602
3603         while (left >= 2) {
3604                 u8 id, elen;
3605
3606                 id = *pos++;
3607                 elen = *pos++;
3608                 left -= 2;
3609
3610                 if (elen > left)
3611                         return -1;
3612
3613                 switch (id) {
3614                 case WLAN_EID_DS_PARAMS:
3615                         elems->ds_params = pos;
3616                         elems->ds_params_len = elen;
3617                         break;
3618                 case WLAN_EID_TIM:
3619                         elems->tim = pos;
3620                         elems->tim_len = elen;
3621                         break;
3622                 case WLAN_EID_IBSS_PARAMS:
3623                         elems->ibss_params = pos;
3624                         elems->ibss_params_len = elen;
3625                         break;
3626                 case WLAN_EID_ERP_INFO:
3627                         elems->erp_info = pos;
3628                         elems->erp_info_len = elen;
3629                         break;
3630                 case WLAN_EID_HT_CAPABILITY:
3631                         elems->ht_cap_param = pos;
3632                         elems->ht_cap_param_len = elen;
3633                         break;
3634                 case WLAN_EID_HT_EXTRA_INFO:
3635                         elems->ht_extra_param = pos;
3636                         elems->ht_extra_param_len = elen;
3637                         break;
3638                 default:
3639                         unknown++;
3640                         break;
3641                 }
3642
3643                 left -= elen;
3644                 pos += elen;
3645         }
3646
3647         return 0;
3648 }
3649
3650 void iwl4965_init_ht_hw_capab(struct iwl_priv *priv,
3651                               struct ieee80211_ht_info *ht_info,
3652                               enum ieee80211_band band)
3653 {
3654         ht_info->cap = 0;
3655         memset(ht_info->supp_mcs_set, 0, 16);
3656
3657         ht_info->ht_supported = 1;
3658
3659         if (band == IEEE80211_BAND_5GHZ) {
3660                 ht_info->cap |= (u16)IEEE80211_HT_CAP_SUP_WIDTH;
3661                 ht_info->cap |= (u16)IEEE80211_HT_CAP_SGI_40;
3662                 ht_info->supp_mcs_set[4] = 0x01;
3663         }
3664         ht_info->cap |= (u16)IEEE80211_HT_CAP_GRN_FLD;
3665         ht_info->cap |= (u16)IEEE80211_HT_CAP_SGI_20;
3666         ht_info->cap |= (u16)(IEEE80211_HT_CAP_MIMO_PS &
3667                              (IWL_MIMO_PS_NONE << 2));
3668
3669         if (priv->cfg->mod_params->amsdu_size_8K)
3670                 ht_info->cap |= (u16)IEEE80211_HT_CAP_MAX_AMSDU;
3671
3672         ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
3673         ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
3674
3675         ht_info->supp_mcs_set[0] = 0xFF;
3676         ht_info->supp_mcs_set[1] = 0xFF;
3677 }
3678 #endif /* CONFIG_IWL4965_HT */
3679
3680 static void iwl4965_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
3681 {
3682         unsigned long flags;
3683
3684         spin_lock_irqsave(&priv->sta_lock, flags);
3685         priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
3686         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
3687         priv->stations[sta_id].sta.sta.modify_mask = 0;
3688         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3689         spin_unlock_irqrestore(&priv->sta_lock, flags);
3690
3691         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
3692 }
3693
3694 static void iwl4965_update_ps_mode(struct iwl_priv *priv, u16 ps_bit, u8 *addr)
3695 {
3696         /* FIXME: need locking over ps_status ??? */
3697         u8 sta_id = iwl4965_hw_find_station(priv, addr);
3698
3699         if (sta_id != IWL_INVALID_STATION) {
3700                 u8 sta_awake = priv->stations[sta_id].
3701                                 ps_status == STA_PS_STATUS_WAKE;
3702
3703                 if (sta_awake && ps_bit)
3704                         priv->stations[sta_id].ps_status = STA_PS_STATUS_SLEEP;
3705                 else if (!sta_awake && !ps_bit) {
3706                         iwl4965_sta_modify_ps_wake(priv, sta_id);
3707                         priv->stations[sta_id].ps_status = STA_PS_STATUS_WAKE;
3708                 }
3709         }
3710 }
3711 #ifdef CONFIG_IWLWIFI_DEBUG
3712
3713 /**
3714  * iwl4965_dbg_report_frame - dump frame to syslog during debug sessions
3715  *
3716  * You may hack this function to show different aspects of received frames,
3717  * including selective frame dumps.
3718  * group100 parameter selects whether to show 1 out of 100 good frames.
3719  *
3720  * TODO:  This was originally written for 3945, need to audit for
3721  *        proper operation with 4965.
3722  */
3723 static void iwl4965_dbg_report_frame(struct iwl_priv *priv,
3724                       struct iwl4965_rx_packet *pkt,
3725                       struct ieee80211_hdr *header, int group100)
3726 {
3727         u32 to_us;
3728         u32 print_summary = 0;
3729         u32 print_dump = 0;     /* set to 1 to dump all frames' contents */
3730         u32 hundred = 0;
3731         u32 dataframe = 0;
3732         u16 fc;
3733         u16 seq_ctl;
3734         u16 channel;
3735         u16 phy_flags;
3736         int rate_sym;
3737         u16 length;
3738         u16 status;
3739         u16 bcn_tmr;
3740         u32 tsf_low;
3741         u64 tsf;
3742         u8 rssi;
3743         u8 agc;
3744         u16 sig_avg;
3745         u16 noise_diff;
3746         struct iwl4965_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
3747         struct iwl4965_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
3748         struct iwl4965_rx_frame_end *rx_end = IWL_RX_END(pkt);
3749         u8 *data = IWL_RX_DATA(pkt);
3750
3751         if (likely(!(iwl_debug_level & IWL_DL_RX)))
3752                 return;
3753
3754         /* MAC header */
3755         fc = le16_to_cpu(header->frame_control);
3756         seq_ctl = le16_to_cpu(header->seq_ctrl);
3757
3758         /* metadata */
3759         channel = le16_to_cpu(rx_hdr->channel);
3760         phy_flags = le16_to_cpu(rx_hdr->phy_flags);
3761         rate_sym = rx_hdr->rate;
3762         length = le16_to_cpu(rx_hdr->len);
3763
3764         /* end-of-frame status and timestamp */
3765         status = le32_to_cpu(rx_end->status);
3766         bcn_tmr = le32_to_cpu(rx_end->beacon_timestamp);
3767         tsf_low = le64_to_cpu(rx_end->timestamp) & 0x0ffffffff;
3768         tsf = le64_to_cpu(rx_end->timestamp);
3769
3770         /* signal statistics */
3771         rssi = rx_stats->rssi;
3772         agc = rx_stats->agc;
3773         sig_avg = le16_to_cpu(rx_stats->sig_avg);
3774         noise_diff = le16_to_cpu(rx_stats->noise_diff);
3775
3776         to_us = !compare_ether_addr(header->addr1, priv->mac_addr);
3777
3778         /* if data frame is to us and all is good,
3779          *   (optionally) print summary for only 1 out of every 100 */
3780         if (to_us && (fc & ~IEEE80211_FCTL_PROTECTED) ==
3781             (IEEE80211_FCTL_FROMDS | IEEE80211_FTYPE_DATA)) {
3782                 dataframe = 1;
3783                 if (!group100)
3784                         print_summary = 1;      /* print each frame */
3785                 else if (priv->framecnt_to_us < 100) {
3786                         priv->framecnt_to_us++;
3787                         print_summary = 0;
3788                 } else {
3789                         priv->framecnt_to_us = 0;
3790                         print_summary = 1;
3791                         hundred = 1;
3792                 }
3793         } else {
3794                 /* print summary for all other frames */
3795                 print_summary = 1;
3796         }
3797
3798         if (print_summary) {
3799                 char *title;
3800                 int rate_idx;
3801                 u32 bitrate;
3802
3803                 if (hundred)
3804                         title = "100Frames";
3805                 else if (fc & IEEE80211_FCTL_RETRY)
3806                         title = "Retry";
3807                 else if (ieee80211_is_assoc_response(fc))
3808                         title = "AscRsp";
3809                 else if (ieee80211_is_reassoc_response(fc))
3810                         title = "RasRsp";
3811                 else if (ieee80211_is_probe_response(fc)) {
3812                         title = "PrbRsp";
3813                         print_dump = 1; /* dump frame contents */
3814                 } else if (ieee80211_is_beacon(fc)) {
3815                         title = "Beacon";
3816                         print_dump = 1; /* dump frame contents */
3817                 } else if (ieee80211_is_atim(fc))
3818                         title = "ATIM";
3819                 else if (ieee80211_is_auth(fc))
3820                         title = "Auth";
3821                 else if (ieee80211_is_deauth(fc))
3822                         title = "DeAuth";
3823                 else if (ieee80211_is_disassoc(fc))
3824                         title = "DisAssoc";
3825                 else
3826                         title = "Frame";
3827
3828                 rate_idx = iwl4965_hwrate_to_plcp_idx(rate_sym);
3829                 if (unlikely(rate_idx == -1))
3830                         bitrate = 0;
3831                 else
3832                         bitrate = iwl4965_rates[rate_idx].ieee / 2;
3833
3834                 /* print frame summary.
3835                  * MAC addresses show just the last byte (for brevity),
3836                  *    but you can hack it to show more, if you'd like to. */
3837                 if (dataframe)
3838                         IWL_DEBUG_RX("%s: mhd=0x%04x, dst=0x%02x, "
3839                                      "len=%u, rssi=%d, chnl=%d, rate=%u, \n",
3840                                      title, fc, header->addr1[5],
3841                                      length, rssi, channel, bitrate);
3842                 else {
3843                         /* src/dst addresses assume managed mode */
3844                         IWL_DEBUG_RX("%s: 0x%04x, dst=0x%02x, "
3845                                      "src=0x%02x, rssi=%u, tim=%lu usec, "
3846                                      "phy=0x%02x, chnl=%d\n",
3847                                      title, fc, header->addr1[5],
3848                                      header->addr3[5], rssi,
3849                                      tsf_low - priv->scan_start_tsf,
3850                                      phy_flags, channel);
3851                 }
3852         }
3853         if (print_dump)
3854                 iwl_print_hex_dump(IWL_DL_RX, data, length);
3855 }
3856 #else
3857 static inline void iwl4965_dbg_report_frame(struct iwl_priv *priv,
3858                                             struct iwl4965_rx_packet *pkt,
3859                                             struct ieee80211_hdr *header,
3860                                             int group100)
3861 {
3862 }
3863 #endif
3864
3865
3866 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
3867
3868 /* Called for REPLY_RX (legacy ABG frames), or
3869  * REPLY_RX_MPDU_CMD (HT high-throughput N frames). */
3870 static void iwl4965_rx_reply_rx(struct iwl_priv *priv,
3871                                 struct iwl4965_rx_mem_buffer *rxb)
3872 {
3873         struct ieee80211_hdr *header;
3874         struct ieee80211_rx_status rx_status;
3875         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3876         /* Use phy data (Rx signal strength, etc.) contained within
3877          *   this rx packet for legacy frames,
3878          *   or phy data cached from REPLY_RX_PHY_CMD for HT frames. */
3879         int include_phy = (pkt->hdr.cmd == REPLY_RX);
3880         struct iwl4965_rx_phy_res *rx_start = (include_phy) ?
3881                 (struct iwl4965_rx_phy_res *)&(pkt->u.raw[0]) :
3882                 (struct iwl4965_rx_phy_res *)&priv->last_phy_res[1];
3883         __le32 *rx_end;
3884         unsigned int len = 0;
3885         u16 fc;
3886         u8 network_packet;
3887
3888         rx_status.mactime = le64_to_cpu(rx_start->timestamp);
3889         rx_status.freq = ieee80211chan2mhz(le16_to_cpu(rx_start->channel));
3890         rx_status.band = (rx_start->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ?
3891                                 IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
3892         rx_status.rate_idx = iwl4965_hwrate_to_plcp_idx(
3893                                         le32_to_cpu(rx_start->rate_n_flags));
3894
3895         if (rx_status.band == IEEE80211_BAND_5GHZ)
3896                 rx_status.rate_idx -= IWL_FIRST_OFDM_RATE;
3897
3898         rx_status.antenna = 0;
3899         rx_status.flag = 0;
3900
3901         if ((unlikely(rx_start->cfg_phy_cnt > 20))) {
3902                 IWL_DEBUG_DROP
3903                         ("dsp size out of range [0,20]: "
3904                          "%d/n", rx_start->cfg_phy_cnt);
3905                 return;
3906         }
3907
3908         if (!include_phy) {
3909                 if (priv->last_phy_res[0])
3910                         rx_start = (struct iwl4965_rx_phy_res *)
3911                                 &priv->last_phy_res[1];
3912                 else
3913                         rx_start = NULL;
3914         }
3915
3916         if (!rx_start) {
3917                 IWL_ERROR("MPDU frame without a PHY data\n");
3918                 return;
3919         }
3920
3921         if (include_phy) {
3922                 header = (struct ieee80211_hdr *)((u8 *) & rx_start[1]
3923                                                   + rx_start->cfg_phy_cnt);
3924
3925                 len = le16_to_cpu(rx_start->byte_count);
3926                 rx_end = (__le32 *)(pkt->u.raw + rx_start->cfg_phy_cnt +
3927                                   sizeof(struct iwl4965_rx_phy_res) + len);
3928         } else {
3929                 struct iwl4965_rx_mpdu_res_start *amsdu =
3930                         (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw;
3931
3932                 header = (void *)(pkt->u.raw +
3933                         sizeof(struct iwl4965_rx_mpdu_res_start));
3934                 len = le16_to_cpu(amsdu->byte_count);
3935                 rx_end = (__le32 *) (pkt->u.raw +
3936                         sizeof(struct iwl4965_rx_mpdu_res_start) + len);
3937         }
3938
3939         if (!(*rx_end & RX_RES_STATUS_NO_CRC32_ERROR) ||
3940             !(*rx_end & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
3941                 IWL_DEBUG_RX("Bad CRC or FIFO: 0x%08X.\n",
3942                                 le32_to_cpu(*rx_end));
3943                 return;
3944         }
3945
3946         priv->ucode_beacon_time = le32_to_cpu(rx_start->beacon_time_stamp);
3947
3948         /* Find max signal strength (dBm) among 3 antenna/receiver chains */
3949         rx_status.ssi = iwl4965_calc_rssi(rx_start);
3950
3951         /* Meaningful noise values are available only from beacon statistics,
3952          *   which are gathered only when associated, and indicate noise
3953          *   only for the associated network channel ...
3954          * Ignore these noise values while scanning (other channels) */
3955         if (iwl4965_is_associated(priv) &&
3956             !test_bit(STATUS_SCANNING, &priv->status)) {
3957                 rx_status.noise = priv->last_rx_noise;
3958                 rx_status.signal = iwl4965_calc_sig_qual(rx_status.ssi,
3959                                                          rx_status.noise);
3960         } else {
3961                 rx_status.noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
3962                 rx_status.signal = iwl4965_calc_sig_qual(rx_status.ssi, 0);
3963         }
3964
3965         /* Reset beacon noise level if not associated. */
3966         if (!iwl4965_is_associated(priv))
3967                 priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
3968
3969         /* Set "1" to report good data frames in groups of 100 */
3970         /* FIXME: need to optimze the call: */
3971         iwl4965_dbg_report_frame(priv, pkt, header, 1);
3972
3973         IWL_DEBUG_STATS_LIMIT("Rssi %d, noise %d, qual %d, TSF %llu\n",
3974                               rx_status.ssi, rx_status.noise, rx_status.signal,
3975                               rx_status.mactime);
3976
3977         network_packet = iwl4965_is_network_packet(priv, header);
3978         if (network_packet) {
3979                 priv->last_rx_rssi = rx_status.ssi;
3980                 priv->last_beacon_time =  priv->ucode_beacon_time;
3981                 priv->last_tsf = le64_to_cpu(rx_start->timestamp);
3982         }
3983
3984         fc = le16_to_cpu(header->frame_control);
3985         switch (fc & IEEE80211_FCTL_FTYPE) {
3986         case IEEE80211_FTYPE_MGMT:
3987
3988                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
3989                         iwl4965_update_ps_mode(priv, fc  & IEEE80211_FCTL_PM,
3990                                                 header->addr2);
3991                 switch (fc & IEEE80211_FCTL_STYPE) {
3992                 case IEEE80211_STYPE_PROBE_RESP:
3993                 case IEEE80211_STYPE_BEACON:
3994                         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA &&
3995                              !compare_ether_addr(header->addr2, priv->bssid)) ||
3996                             (priv->iw_mode == IEEE80211_IF_TYPE_IBSS &&
3997                              !compare_ether_addr(header->addr3, priv->bssid))) {
3998                                 struct ieee80211_mgmt *mgmt =
3999                                         (struct ieee80211_mgmt *)header;
4000                                 u64 timestamp =
4001                                         le64_to_cpu(mgmt->u.beacon.timestamp);
4002
4003                                 priv->timestamp0 = timestamp & 0xFFFFFFFF;
4004                                 priv->timestamp1 =
4005                                         (timestamp >> 32) & 0xFFFFFFFF;
4006                                 priv->beacon_int = le16_to_cpu(
4007                                     mgmt->u.beacon.beacon_int);
4008                                 if (priv->call_post_assoc_from_beacon &&
4009                                     (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
4010                                         priv->call_post_assoc_from_beacon = 0;
4011                                         queue_work(priv->workqueue,
4012                                             &priv->post_associate.work);
4013                                 }
4014                         }
4015                         break;
4016
4017                 case IEEE80211_STYPE_ACTION:
4018                         break;
4019
4020                         /*
4021                          * TODO: Use the new callback function from
4022                          * mac80211 instead of sniffing these packets.
4023                          */
4024                 case IEEE80211_STYPE_ASSOC_RESP:
4025                 case IEEE80211_STYPE_REASSOC_RESP:
4026                         if (network_packet) {
4027 #ifdef CONFIG_IWL4965_HT
4028                                 u8 *pos = NULL;
4029                                 struct ieee802_11_elems elems;
4030 #endif                          /*CONFIG_IWL4965_HT */
4031                                 struct ieee80211_mgmt *mgnt =
4032                                         (struct ieee80211_mgmt *)header;
4033
4034                                 /* We have just associated, give some
4035                                  * time for the 4-way handshake if
4036                                  * any. Don't start scan too early. */
4037                                 priv->next_scan_jiffies = jiffies +
4038                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
4039
4040                                 priv->assoc_id = (~((1 << 15) | (1 << 14))
4041                                         & le16_to_cpu(mgnt->u.assoc_resp.aid));
4042                                 priv->assoc_capability =
4043                                         le16_to_cpu(
4044                                                 mgnt->u.assoc_resp.capab_info);
4045 #ifdef CONFIG_IWL4965_HT
4046                                 pos = mgnt->u.assoc_resp.variable;
4047                                 if (!parse_elems(pos,
4048                                                  len - (pos - (u8 *) mgnt),
4049                                                  &elems)) {
4050                                         if (elems.ht_extra_param &&
4051                                             elems.ht_cap_param)
4052                                                 break;
4053                                 }
4054 #endif                          /*CONFIG_IWL4965_HT */
4055                                 /* assoc_id is 0 no association */
4056                                 if (!priv->assoc_id)
4057                                         break;
4058                                 if (priv->beacon_int)
4059                                         queue_work(priv->workqueue,
4060                                             &priv->post_associate.work);
4061                                 else
4062                                         priv->call_post_assoc_from_beacon = 1;
4063                         }
4064
4065                         break;
4066
4067                 case IEEE80211_STYPE_PROBE_REQ:
4068                         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
4069                             !iwl4965_is_associated(priv)) {
4070                                 DECLARE_MAC_BUF(mac1);
4071                                 DECLARE_MAC_BUF(mac2);
4072                                 DECLARE_MAC_BUF(mac3);
4073
4074                                 IWL_DEBUG_DROP("Dropping (non network): "
4075                                                "%s, %s, %s\n",
4076                                                print_mac(mac1, header->addr1),
4077                                                print_mac(mac2, header->addr2),
4078                                                print_mac(mac3, header->addr3));
4079                                 return;
4080                         }
4081                 }
4082                 iwl4965_handle_data_packet(priv, 0, include_phy, rxb, &rx_status);
4083                 break;
4084
4085         case IEEE80211_FTYPE_CTL:
4086 #ifdef CONFIG_IWL4965_HT
4087                 switch (fc & IEEE80211_FCTL_STYPE) {
4088                 case IEEE80211_STYPE_BACK_REQ:
4089                         IWL_DEBUG_HT("IEEE80211_STYPE_BACK_REQ arrived\n");
4090                         iwl4965_handle_data_packet(priv, 0, include_phy,
4091                                                 rxb, &rx_status);
4092                         break;
4093                 default:
4094                         break;
4095                 }
4096 #endif
4097                 break;
4098
4099         case IEEE80211_FTYPE_DATA: {
4100                 DECLARE_MAC_BUF(mac1);
4101                 DECLARE_MAC_BUF(mac2);
4102                 DECLARE_MAC_BUF(mac3);
4103
4104                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
4105                         iwl4965_update_ps_mode(priv, fc  & IEEE80211_FCTL_PM,
4106                                                 header->addr2);
4107
4108                 if (unlikely(!network_packet))
4109                         IWL_DEBUG_DROP("Dropping (non network): "
4110                                        "%s, %s, %s\n",
4111                                        print_mac(mac1, header->addr1),
4112                                        print_mac(mac2, header->addr2),
4113                                        print_mac(mac3, header->addr3));
4114                 else if (unlikely(iwl4965_is_duplicate_packet(priv, header)))
4115                         IWL_DEBUG_DROP("Dropping (dup): %s, %s, %s\n",
4116                                        print_mac(mac1, header->addr1),
4117                                        print_mac(mac2, header->addr2),
4118                                        print_mac(mac3, header->addr3));
4119                 else
4120                         iwl4965_handle_data_packet(priv, 1, include_phy, rxb,
4121                                                    &rx_status);
4122                 break;
4123         }
4124         default:
4125                 break;
4126
4127         }
4128 }
4129
4130 /* Cache phy data (Rx signal strength, etc) for HT frame (REPLY_RX_PHY_CMD).
4131  * This will be used later in iwl4965_rx_reply_rx() for REPLY_RX_MPDU_CMD. */
4132 static void iwl4965_rx_reply_rx_phy(struct iwl_priv *priv,
4133                                     struct iwl4965_rx_mem_buffer *rxb)
4134 {
4135         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
4136         priv->last_phy_res[0] = 1;
4137         memcpy(&priv->last_phy_res[1], &(pkt->u.raw[0]),
4138                sizeof(struct iwl4965_rx_phy_res));
4139 }
4140
4141 static void iwl4965_rx_missed_beacon_notif(struct iwl_priv *priv,
4142                                            struct iwl4965_rx_mem_buffer *rxb)
4143
4144 {
4145 #ifdef CONFIG_IWL4965_SENSITIVITY
4146         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
4147         struct iwl4965_missed_beacon_notif *missed_beacon;
4148
4149         missed_beacon = &pkt->u.missed_beacon;
4150         if (le32_to_cpu(missed_beacon->consequtive_missed_beacons) > 5) {
4151                 IWL_DEBUG_CALIB("missed bcn cnsq %d totl %d rcd %d expctd %d\n",
4152                     le32_to_cpu(missed_beacon->consequtive_missed_beacons),
4153                     le32_to_cpu(missed_beacon->total_missed_becons),
4154                     le32_to_cpu(missed_beacon->num_recvd_beacons),
4155                     le32_to_cpu(missed_beacon->num_expected_beacons));
4156                 priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
4157                 if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)))
4158                         queue_work(priv->workqueue, &priv->sensitivity_work);
4159         }
4160 #endif /*CONFIG_IWL4965_SENSITIVITY*/
4161 }
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                 KDR_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, KDR_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, KDR_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 >= ARRAY_SIZE(priv->txq)) {
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, KDR_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, KDR_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 iwl4965_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_setting.bcast_sta_id;
4566
4567         iwl_send_cmd_pdu(priv, REPLY_TX_LINK_QUALITY_CMD, sizeof(link_cmd),
4568                          &link_cmd);
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_setting.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         INIT_WORK(&priv->statistics_work, iwl4965_bg_statistics_work);
4938 #ifdef CONFIG_IWL4965_SENSITIVITY
4939         INIT_WORK(&priv->sensitivity_work, iwl4965_bg_sensitivity_work);
4940 #endif
4941         init_timer(&priv->statistics_periodic);
4942         priv->statistics_periodic.data = (unsigned long)priv;
4943         priv->statistics_periodic.function = iwl4965_bg_statistics_periodic;
4944 }
4945
4946 void iwl4965_hw_cancel_deferred_work(struct iwl_priv *priv)
4947 {
4948         del_timer_sync(&priv->statistics_periodic);
4949
4950         cancel_delayed_work(&priv->init_alive_start);
4951 }
4952
4953 static struct iwl_hcmd_utils_ops iwl4965_hcmd_utils = {
4954         .enqueue_hcmd = iwl4965_enqueue_hcmd,
4955 };
4956
4957 static struct iwl_lib_ops iwl4965_lib = {
4958         .init_drv = iwl4965_init_drv,
4959         .eeprom_ops = {
4960                 .verify_signature  = iwlcore_eeprom_verify_signature,
4961                 .acquire_semaphore = iwlcore_eeprom_acquire_semaphore,
4962                 .release_semaphore = iwlcore_eeprom_release_semaphore,
4963         },
4964 };
4965
4966 static struct iwl_ops iwl4965_ops = {
4967         .lib = &iwl4965_lib,
4968         .utils = &iwl4965_hcmd_utils,
4969 };
4970
4971 static struct iwl_cfg iwl4965_agn_cfg = {
4972         .name = "4965AGN",
4973         .fw_name = "iwlwifi-4965" IWL4965_UCODE_API ".ucode",
4974         .sku = IWL_SKU_A|IWL_SKU_G|IWL_SKU_N,
4975         .ops = &iwl4965_ops,
4976         .mod_params = &iwl4965_mod_params,
4977 };
4978
4979 struct pci_device_id iwl4965_hw_card_ids[] = {
4980         {IWL_PCI_DEVICE(0x4229, PCI_ANY_ID, iwl4965_agn_cfg)},
4981         {IWL_PCI_DEVICE(0x4230, PCI_ANY_ID, iwl4965_agn_cfg)},
4982         {0}
4983 };
4984
4985 MODULE_DEVICE_TABLE(pci, iwl4965_hw_card_ids);
4986
4987 module_param_named(antenna, iwl4965_mod_params.antenna, int, 0444);
4988 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
4989 module_param_named(disable, iwl4965_mod_params.disable, int, 0444);
4990 MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
4991 module_param_named(hwcrypto, iwl4965_mod_params.hw_crypto, int, 0444);
4992 MODULE_PARM_DESC(hwcrypto,
4993                  "using hardware crypto engine (default 0 [software])\n");
4994 module_param_named(debug, iwl4965_mod_params.debug, int, 0444);
4995 MODULE_PARM_DESC(debug, "debug output mask");
4996 module_param_named(
4997         disable_hw_scan, iwl4965_mod_params.disable_hw_scan, int, 0444);
4998 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
4999
5000 module_param_named(queues_num, iwl4965_mod_params.num_of_queues, int, 0444);
5001 MODULE_PARM_DESC(queues_num, "number of hw queues.");
5002
5003 /* QoS */
5004 module_param_named(qos_enable, iwl4965_mod_params.enable_qos, int, 0444);
5005 MODULE_PARM_DESC(qos_enable, "enable all QoS functionality");
5006 module_param_named(amsdu_size_8K, iwl4965_mod_params.amsdu_size_8K, int, 0444);
5007 MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size");
5008