SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/net/wireless/iwlwifi/iwl-4965.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2007 Intel Corporation. All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of version 2 of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  17  *
  18  * The full GNU General Public License is included in this distribution in the
  19  * file called LICENSE.
  20  *
  21  * Contact Information:
  22  * James P. Ketrenos <ipw2100-admin@linux.intel.com>
  23  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  24  *
  25  *****************************************************************************/
  26
  27 #include <linux/kernel.h>
  28 #include <linux/module.h>
  29 #include <linux/version.h>
  30 #include <linux/init.h>
  31 #include <linux/pci.h>
  32 #include <linux/dma-mapping.h>
  33 #include <linux/delay.h>
  34 #include <linux/skbuff.h>
  35 #include <linux/netdevice.h>
  36 #include <linux/wireless.h>
  37 #include <net/mac80211.h>
  38 #include <linux/etherdevice.h>
  39 #include <asm/unaligned.h>
  40
  41 #include "iwl-4965.h"
  42 #include "iwl-helpers.h"
  43
  44 static void iwl4965_hw_card_show_info(struct iwl4965_priv *priv);
  45
  46 #define IWL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np)    \
  47         [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP,      \
  48                                     IWL_RATE_SISO_##s##M_PLCP, \
  49                                     IWL_RATE_MIMO_##s##M_PLCP, \
  50                                     IWL_RATE_##r##M_IEEE,      \
  51                                     IWL_RATE_##ip##M_INDEX,    \
  52                                     IWL_RATE_##in##M_INDEX,    \
  53                                     IWL_RATE_##rp##M_INDEX,    \
  54                                     IWL_RATE_##rn##M_INDEX,    \
  55                                     IWL_RATE_##pp##M_INDEX,    \
  56                                     IWL_RATE_##np##M_INDEX }
  57
  58 /*
  59  * Parameter order:
  60  *   rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate
  61  *
  62  * If there isn't a valid next or previous rate then INV is used which
  63  * maps to IWL_RATE_INVALID
  64  *
  65  */
  66 const struct iwl4965_rate_info iwl4965_rates[IWL_RATE_COUNT] = {
  67         IWL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2),    /*  1mbps */
  68         IWL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5),          /*  2mbps */
  69         IWL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11),        /*5.5mbps */
  70         IWL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18),      /* 11mbps */
  71         IWL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11),        /*  6mbps */
  72         IWL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11),       /*  9mbps */
  73         IWL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18),   /* 12mbps */
  74         IWL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24),   /* 18mbps */
  75         IWL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36),   /* 24mbps */
  76         IWL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48),   /* 36mbps */
  77         IWL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54),   /* 48mbps */
  78         IWL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */
  79         IWL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */
  80 };
  81
  82 #ifdef CONFIG_IWL4965_HT
  83
  84 static const u16 default_tid_to_tx_fifo[] = {
  85         IWL_TX_FIFO_AC1,
  86         IWL_TX_FIFO_AC0,
  87         IWL_TX_FIFO_AC0,
  88         IWL_TX_FIFO_AC1,
  89         IWL_TX_FIFO_AC2,
  90         IWL_TX_FIFO_AC2,
  91         IWL_TX_FIFO_AC3,
  92         IWL_TX_FIFO_AC3,
  93         IWL_TX_FIFO_NONE,
  94         IWL_TX_FIFO_NONE,
  95         IWL_TX_FIFO_NONE,
  96         IWL_TX_FIFO_NONE,
  97         IWL_TX_FIFO_NONE,
  98         IWL_TX_FIFO_NONE,
  99         IWL_TX_FIFO_NONE,
 100         IWL_TX_FIFO_NONE,
 101         IWL_TX_FIFO_AC3
 102 };
 103
 104 #endif  /*CONFIG_IWL4965_HT */
 105
 106 static int is_fat_channel(__le32 rxon_flags)
 107 {
 108         return (rxon_flags & RXON_FLG_CHANNEL_MODE_PURE_40_MSK) ||
 109                 (rxon_flags & RXON_FLG_CHANNEL_MODE_MIXED_MSK);
 110 }
 111
 112 static u8 is_single_stream(struct iwl4965_priv *priv)
 113 {
 114 #ifdef CONFIG_IWL4965_HT
 115         if (!priv->current_ht_config.is_ht ||
 116             (priv->current_ht_config.supp_mcs_set[1] == 0) ||
 117             (priv->ps_mode == IWL_MIMO_PS_STATIC))
 118                 return 1;
 119 #else
 120         return 1;
 121 #endif  /*CONFIG_IWL4965_HT */
 122         return 0;
 123 }
 124
 125 int iwl4965_hwrate_to_plcp_idx(u32 rate_n_flags)
 126 {
 127         int idx = 0;
 128
 129         /* 4965 HT rate format */
 130         if (rate_n_flags & RATE_MCS_HT_MSK) {
 131                 idx = (rate_n_flags & 0xff);
 132
 133                 if (idx >= IWL_RATE_MIMO_6M_PLCP)
 134                         idx = idx - IWL_RATE_MIMO_6M_PLCP;
 135
 136                 idx += IWL_FIRST_OFDM_RATE;
 137                 /* skip 9M not supported in ht*/
 138                 if (idx >= IWL_RATE_9M_INDEX)
 139                         idx += 1;
 140                 if ((idx >= IWL_FIRST_OFDM_RATE) && (idx <= IWL_LAST_OFDM_RATE))
 141                         return idx;
 142
 143         /* 4965 legacy rate format, search for match in table */
 144         } else {
 145                 for (idx = 0; idx < ARRAY_SIZE(iwl4965_rates); idx++)
 146                         if (iwl4965_rates[idx].plcp == (rate_n_flags & 0xFF))
 147                                 return idx;
 148         }
 149
 150         return -1;
 151 }
 152
 153 /**
 154  * translate ucode response to mac80211 tx status control values
 155  */
 156 void iwl4965_hwrate_to_tx_control(struct iwl4965_priv *priv, u32 rate_n_flags,
 157                                   struct ieee80211_tx_control *control)
 158 {
 159         int rate_index;
 160
 161         control->antenna_sel_tx =
 162                 ((rate_n_flags & RATE_MCS_ANT_AB_MSK) >> RATE_MCS_ANT_A_POS);
 163         if (rate_n_flags & RATE_MCS_HT_MSK)
 164                 control->flags |= IEEE80211_TXCTL_OFDM_HT;
 165         if (rate_n_flags & RATE_MCS_GF_MSK)
 166                 control->flags |= IEEE80211_TXCTL_GREEN_FIELD;
 167         if (rate_n_flags & RATE_MCS_FAT_MSK)
 168                 control->flags |= IEEE80211_TXCTL_40_MHZ_WIDTH;
 169         if (rate_n_flags & RATE_MCS_DUP_MSK)
 170                 control->flags |= IEEE80211_TXCTL_DUP_DATA;
 171         if (rate_n_flags & RATE_MCS_SGI_MSK)
 172                 control->flags |= IEEE80211_TXCTL_SHORT_GI;
 173         /* since iwl4965_hwrate_to_plcp_idx is band indifferent, we always use
 174          * IEEE80211_BAND_2GHZ band as it contains all the rates */
 175         rate_index = iwl4965_hwrate_to_plcp_idx(rate_n_flags);
 176         if (rate_index == -1)
 177                 control->tx_rate = NULL;
 178         else
 179                 control->tx_rate =
 180                         &priv->bands[IEEE80211_BAND_2GHZ].bitrates[rate_index];
 181 }
 182
 183 /*
 184  * Determine how many receiver/antenna chains to use.
 185  * More provides better reception via diversity.  Fewer saves power.
 186  * MIMO (dual stream) requires at least 2, but works better with 3.
 187  * This does not determine *which* chains to use, just how many.
 188  */
 189 static int iwl4965_get_rx_chain_counter(struct iwl4965_priv *priv,
 190                                         u8 *idle_state, u8 *rx_state)
 191 {
 192         u8 is_single = is_single_stream(priv);
 193         u8 is_cam = test_bit(STATUS_POWER_PMI, &priv->status) ? 0 : 1;
 194
 195         /* # of Rx chains to use when expecting MIMO. */
 196         if (is_single || (!is_cam && (priv->ps_mode == IWL_MIMO_PS_STATIC)))
 197                 *rx_state = 2;
 198         else
 199                 *rx_state = 3;
 200
 201         /* # Rx chains when idling and maybe trying to save power */
 202         switch (priv->ps_mode) {
 203         case IWL_MIMO_PS_STATIC:
 204         case IWL_MIMO_PS_DYNAMIC:
 205                 *idle_state = (is_cam) ? 2 : 1;
 206                 break;
 207         case IWL_MIMO_PS_NONE:
 208                 *idle_state = (is_cam) ? *rx_state : 1;
 209                 break;
 210         default:
 211                 *idle_state = 1;
 212                 break;
 213         }
 214
 215         return 0;
 216 }
 217
 218 int iwl4965_hw_rxq_stop(struct iwl4965_priv *priv)
 219 {
 220         int rc;
 221         unsigned long flags;
 222
 223         spin_lock_irqsave(&priv->lock, flags);
 224         rc = iwl4965_grab_nic_access(priv);
 225         if (rc) {
 226                 spin_unlock_irqrestore(&priv->lock, flags);
 227                 return rc;
 228         }
 229
 230         /* stop Rx DMA */
 231         iwl4965_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0);
 232         rc = iwl4965_poll_direct_bit(priv, FH_MEM_RSSR_RX_STATUS_REG,
 233                                      (1 << 24), 1000);
 234         if (rc < 0)
 235                 IWL_ERROR("Can't stop Rx DMA.\n");
 236
 237         iwl4965_release_nic_access(priv);
 238         spin_unlock_irqrestore(&priv->lock, flags);
 239
 240         return 0;
 241 }
 242
 243 u8 iwl4965_hw_find_station(struct iwl4965_priv *priv, const u8 *addr)
 244 {
 245         int i;
 246         int start = 0;
 247         int ret = IWL_INVALID_STATION;
 248         unsigned long flags;
 249         DECLARE_MAC_BUF(mac);
 250
 251         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) ||
 252             (priv->iw_mode == IEEE80211_IF_TYPE_AP))
 253                 start = IWL_STA_ID;
 254
 255         if (is_broadcast_ether_addr(addr))
 256                 return IWL4965_BROADCAST_ID;
 257
 258         spin_lock_irqsave(&priv->sta_lock, flags);
 259         for (i = start; i < priv->hw_setting.max_stations; i++)
 260                 if ((priv->stations[i].used) &&
 261                     (!compare_ether_addr
 262                      (priv->stations[i].sta.sta.addr, addr))) {
 263                         ret = i;
 264                         goto out;
 265                 }
 266
 267         IWL_DEBUG_ASSOC_LIMIT("can not find STA %s total %d\n",
 268                         print_mac(mac, addr), priv->num_stations);
 269
 270  out:
 271         spin_unlock_irqrestore(&priv->sta_lock, flags);
 272         return ret;
 273 }
 274
 275 static int iwl4965_nic_set_pwr_src(struct iwl4965_priv *priv, int pwr_max)
 276 {
 277         int ret;
 278         unsigned long flags;
 279
 280         spin_lock_irqsave(&priv->lock, flags);
 281         ret = iwl4965_grab_nic_access(priv);
 282         if (ret) {
 283                 spin_unlock_irqrestore(&priv->lock, flags);
 284                 return ret;
 285         }
 286
 287         if (!pwr_max) {
 288                 u32 val;
 289
 290                 ret = pci_read_config_dword(priv->pci_dev, PCI_POWER_SOURCE,
 291                                            &val);
 292
 293                 if (val & PCI_CFG_PMC_PME_FROM_D3COLD_SUPPORT)
 294                         iwl4965_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 295                                 APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
 296                                 ~APMG_PS_CTRL_MSK_PWR_SRC);
 297         } else
 298                 iwl4965_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 299                         APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
 300                         ~APMG_PS_CTRL_MSK_PWR_SRC);
 301
 302         iwl4965_release_nic_access(priv);
 303         spin_unlock_irqrestore(&priv->lock, flags);
 304
 305         return ret;
 306 }
 307
 308 static int iwl4965_rx_init(struct iwl4965_priv *priv, struct iwl4965_rx_queue *rxq)
 309 {
 310         int rc;
 311         unsigned long flags;
 312         unsigned int rb_size;
 313
 314         spin_lock_irqsave(&priv->lock, flags);
 315         rc = iwl4965_grab_nic_access(priv);
 316         if (rc) {
 317                 spin_unlock_irqrestore(&priv->lock, flags);
 318                 return rc;
 319         }
 320
 321         if (iwl4965_param_amsdu_size_8K)
 322                 rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_8K;
 323         else
 324                 rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K;
 325
 326         /* Stop Rx DMA */
 327         iwl4965_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0);
 328
 329         /* Reset driver's Rx queue write index */
 330         iwl4965_write_direct32(priv, FH_RSCSR_CHNL0_RBDCB_WPTR_REG, 0);
 331
 332         /* Tell device where to find RBD circular buffer in DRAM */
 333         iwl4965_write_direct32(priv, FH_RSCSR_CHNL0_RBDCB_BASE_REG,
 334                              rxq->dma_addr >> 8);
 335
 336         /* Tell device where in DRAM to update its Rx status */
 337         iwl4965_write_direct32(priv, FH_RSCSR_CHNL0_STTS_WPTR_REG,
 338                              (priv->hw_setting.shared_phys +
 339                               offsetof(struct iwl4965_shared, val0)) >> 4);
 340
 341         /* Enable Rx DMA, enable host interrupt, Rx buffer size 4k, 256 RBDs */
 342         iwl4965_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG,
 343                              FH_RCSR_RX_CONFIG_CHNL_EN_ENABLE_VAL |
 344                              FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_INT_HOST_VAL |
 345                              rb_size |
 346                              /*0x10 << 4 | */
 347                              (RX_QUEUE_SIZE_LOG <<
 348                               FH_RCSR_RX_CONFIG_RBDCB_SIZE_BITSHIFT));
 349
 350         /*
 351          * iwl4965_write32(priv,CSR_INT_COAL_REG,0);
 352          */
 353
 354         iwl4965_release_nic_access(priv);
 355         spin_unlock_irqrestore(&priv->lock, flags);
 356
 357         return 0;
 358 }
 359
 360 /* Tell 4965 where to find the "keep warm" buffer */
 361 static int iwl4965_kw_init(struct iwl4965_priv *priv)
 362 {
 363         unsigned long flags;
 364         int rc;
 365
 366         spin_lock_irqsave(&priv->lock, flags);
 367         rc = iwl4965_grab_nic_access(priv);
 368         if (rc)
 369                 goto out;
 370
 371         iwl4965_write_direct32(priv, IWL_FH_KW_MEM_ADDR_REG,
 372                              priv->kw.dma_addr >> 4);
 373         iwl4965_release_nic_access(priv);
 374 out:
 375         spin_unlock_irqrestore(&priv->lock, flags);
 376         return rc;
 377 }
 378
 379 static int iwl4965_kw_alloc(struct iwl4965_priv *priv)
 380 {
 381         struct pci_dev *dev = priv->pci_dev;
 382         struct iwl4965_kw *kw = &priv->kw;
 383
 384         kw->size = IWL4965_KW_SIZE;     /* TBW need set somewhere else */
 385         kw->v_addr = pci_alloc_consistent(dev, kw->size, &kw->dma_addr);
 386         if (!kw->v_addr)
 387                 return -ENOMEM;
 388
 389         return 0;
 390 }
 391
 392 #define CHECK_AND_PRINT(x) ((eeprom_ch->flags & EEPROM_CHANNEL_##x) \
 393                             ? # x " " : "")
 394
 395 /**
 396  * iwl4965_set_fat_chan_info - Copy fat channel info into driver's priv.
 397  *
 398  * Does not set up a command, or touch hardware.
 399  */
 400 int iwl4965_set_fat_chan_info(struct iwl4965_priv *priv,
 401                               enum ieee80211_band band, u16 channel,
 402                               const struct iwl4965_eeprom_channel *eeprom_ch,
 403                               u8 fat_extension_channel)
 404 {
 405         struct iwl4965_channel_info *ch_info;
 406
 407         ch_info = (struct iwl4965_channel_info *)
 408                         iwl4965_get_channel_info(priv, band, channel);
 409
 410         if (!is_channel_valid(ch_info))
 411                 return -1;
 412
 413         IWL_DEBUG_INFO("FAT Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x"
 414                         " %ddBm): Ad-Hoc %ssupported\n",
 415                         ch_info->channel,
 416                         is_channel_a_band(ch_info) ?
 417                         "5.2" : "2.4",
 418                         CHECK_AND_PRINT(IBSS),
 419                         CHECK_AND_PRINT(ACTIVE),
 420                         CHECK_AND_PRINT(RADAR),
 421                         CHECK_AND_PRINT(WIDE),
 422                         CHECK_AND_PRINT(NARROW),
 423                         CHECK_AND_PRINT(DFS),
 424                         eeprom_ch->flags,
 425                         eeprom_ch->max_power_avg,
 426                         ((eeprom_ch->flags & EEPROM_CHANNEL_IBSS)
 427                          && !(eeprom_ch->flags & EEPROM_CHANNEL_RADAR)) ?
 428                         "" : "not ");
 429
 430         ch_info->fat_eeprom = *eeprom_ch;
 431         ch_info->fat_max_power_avg = eeprom_ch->max_power_avg;
 432         ch_info->fat_curr_txpow = eeprom_ch->max_power_avg;
 433         ch_info->fat_min_power = 0;
 434         ch_info->fat_scan_power = eeprom_ch->max_power_avg;
 435         ch_info->fat_flags = eeprom_ch->flags;
 436         ch_info->fat_extension_channel = fat_extension_channel;
 437
 438         return 0;
 439 }
 440
 441 /**
 442  * iwl4965_kw_free - Free the "keep warm" buffer
 443  */
 444 static void iwl4965_kw_free(struct iwl4965_priv *priv)
 445 {
 446         struct pci_dev *dev = priv->pci_dev;
 447         struct iwl4965_kw *kw = &priv->kw;
 448
 449         if (kw->v_addr) {
 450                 pci_free_consistent(dev, kw->size, kw->v_addr, kw->dma_addr);
 451                 memset(kw, 0, sizeof(*kw));
 452         }
 453 }
 454
 455 /**
 456  * iwl4965_txq_ctx_reset - Reset TX queue context
 457  * Destroys all DMA structures and initialise them again
 458  *
 459  * @param priv
 460  * @return error code
 461  */
 462 static int iwl4965_txq_ctx_reset(struct iwl4965_priv *priv)
 463 {
 464         int rc = 0;
 465         int txq_id, slots_num;
 466         unsigned long flags;
 467
 468         iwl4965_kw_free(priv);
 469
 470         /* Free all tx/cmd queues and keep-warm buffer */
 471         iwl4965_hw_txq_ctx_free(priv);
 472
 473         /* Alloc keep-warm buffer */
 474         rc = iwl4965_kw_alloc(priv);
 475         if (rc) {
 476                 IWL_ERROR("Keep Warm allocation failed");
 477                 goto error_kw;
 478         }
 479
 480         spin_lock_irqsave(&priv->lock, flags);
 481
 482         rc = iwl4965_grab_nic_access(priv);
 483         if (unlikely(rc)) {
 484                 IWL_ERROR("TX reset failed");
 485                 spin_unlock_irqrestore(&priv->lock, flags);
 486                 goto error_reset;
 487         }
 488
 489         /* Turn off all Tx DMA channels */
 490         iwl4965_write_prph(priv, KDR_SCD_TXFACT, 0);
 491         iwl4965_release_nic_access(priv);
 492         spin_unlock_irqrestore(&priv->lock, flags);
 493
 494         /* Tell 4965 where to find the keep-warm buffer */
 495         rc = iwl4965_kw_init(priv);
 496         if (rc) {
 497                 IWL_ERROR("kw_init failed\n");
 498                 goto error_reset;
 499         }
 500
 501         /* Alloc and init all (default 16) Tx queues,
 502          * including the command queue (#4) */
 503         for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++) {
 504                 slots_num = (txq_id == IWL_CMD_QUEUE_NUM) ?
 505                                         TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS;
 506                 rc = iwl4965_tx_queue_init(priv, &priv->txq[txq_id], slots_num,
 507                                        txq_id);
 508                 if (rc) {
 509                         IWL_ERROR("Tx %d queue init failed\n", txq_id);
 510                         goto error;
 511                 }
 512         }
 513
 514         return rc;
 515
 516  error:
 517         iwl4965_hw_txq_ctx_free(priv);
 518  error_reset:
 519         iwl4965_kw_free(priv);
 520  error_kw:
 521         return rc;
 522 }
 523
 524 int iwl4965_hw_nic_init(struct iwl4965_priv *priv)
 525 {
 526         int rc;
 527         unsigned long flags;
 528         struct iwl4965_rx_queue *rxq = &priv->rxq;
 529         u8 rev_id;
 530         u32 val;
 531         u8 val_link;
 532
 533         iwl4965_power_init_handle(priv);
 534
 535         /* nic_init */
 536         spin_lock_irqsave(&priv->lock, flags);
 537
 538         iwl4965_set_bit(priv, CSR_GIO_CHICKEN_BITS,
 539                     CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
 540
 541         iwl4965_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 542         rc = iwl4965_poll_bit(priv, CSR_GP_CNTRL,
 543                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
 544                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
 545         if (rc < 0) {
 546                 spin_unlock_irqrestore(&priv->lock, flags);
 547                 IWL_DEBUG_INFO("Failed to init the card\n");
 548                 return rc;
 549         }
 550
 551         rc = iwl4965_grab_nic_access(priv);
 552         if (rc) {
 553                 spin_unlock_irqrestore(&priv->lock, flags);
 554                 return rc;
 555         }
 556
 557         iwl4965_read_prph(priv, APMG_CLK_CTRL_REG);
 558
 559         iwl4965_write_prph(priv, APMG_CLK_CTRL_REG,
 560                                  APMG_CLK_VAL_DMA_CLK_RQT |
 561                                  APMG_CLK_VAL_BSM_CLK_RQT);
 562         iwl4965_read_prph(priv, APMG_CLK_CTRL_REG);
 563
 564         udelay(20);
 565
 566         iwl4965_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
 567                                     APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
 568
 569         iwl4965_release_nic_access(priv);
 570         iwl4965_write32(priv, CSR_INT_COALESCING, 512 / 32);
 571         spin_unlock_irqrestore(&priv->lock, flags);
 572
 573         /* Determine HW type */
 574         rc = pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &rev_id);
 575         if (rc)
 576                 return rc;
 577
 578         IWL_DEBUG_INFO("HW Revision ID = 0x%X\n", rev_id);
 579
 580         iwl4965_nic_set_pwr_src(priv, 1);
 581         spin_lock_irqsave(&priv->lock, flags);
 582
 583         if ((rev_id & 0x80) == 0x80 && (rev_id & 0x7f) < 8) {
 584                 pci_read_config_dword(priv->pci_dev, PCI_REG_WUM8, &val);
 585                 /* Enable No Snoop field */
 586                 pci_write_config_dword(priv->pci_dev, PCI_REG_WUM8,
 587                                        val & ~(1 << 11));
 588         }
 589
 590         spin_unlock_irqrestore(&priv->lock, flags);
 591
 592         if (priv->eeprom.calib_version < EEPROM_TX_POWER_VERSION_NEW) {
 593                 IWL_ERROR("Older EEPROM detected!  Aborting.\n");
 594                 return -EINVAL;
 595         }
 596
 597         pci_read_config_byte(priv->pci_dev, PCI_LINK_CTRL, &val_link);
 598
 599         /* disable L1 entry -- workaround for pre-B1 */
 600         pci_write_config_byte(priv->pci_dev, PCI_LINK_CTRL, val_link & ~0x02);
 601
 602         spin_lock_irqsave(&priv->lock, flags);
 603
 604         /* set CSR_HW_CONFIG_REG for uCode use */
 605
 606         iwl4965_set_bit(priv, CSR_HW_IF_CONFIG_REG,
 607                         CSR49_HW_IF_CONFIG_REG_BIT_4965_R |
 608                         CSR49_HW_IF_CONFIG_REG_BIT_RADIO_SI |
 609                         CSR49_HW_IF_CONFIG_REG_BIT_MAC_SI);
 610
 611         rc = iwl4965_grab_nic_access(priv);
 612         if (rc < 0) {
 613                 spin_unlock_irqrestore(&priv->lock, flags);
 614                 IWL_DEBUG_INFO("Failed to init the card\n");
 615                 return rc;
 616         }
 617
 618         iwl4965_read_prph(priv, APMG_PS_CTRL_REG);
 619         iwl4965_set_bits_prph(priv, APMG_PS_CTRL_REG,
 620                                     APMG_PS_CTRL_VAL_RESET_REQ);
 621         udelay(5);
 622         iwl4965_clear_bits_prph(priv, APMG_PS_CTRL_REG,
 623                                       APMG_PS_CTRL_VAL_RESET_REQ);
 624
 625         iwl4965_release_nic_access(priv);
 626         spin_unlock_irqrestore(&priv->lock, flags);
 627
 628         iwl4965_hw_card_show_info(priv);
 629
 630         /* end nic_init */
 631
 632         /* Allocate the RX queue, or reset if it is already allocated */
 633         if (!rxq->bd) {
 634                 rc = iwl4965_rx_queue_alloc(priv);
 635                 if (rc) {
 636                         IWL_ERROR("Unable to initialize Rx queue\n");
 637                         return -ENOMEM;
 638                 }
 639         } else
 640                 iwl4965_rx_queue_reset(priv, rxq);
 641
 642         iwl4965_rx_replenish(priv);
 643
 644         iwl4965_rx_init(priv, rxq);
 645
 646         spin_lock_irqsave(&priv->lock, flags);
 647
 648         rxq->need_update = 1;
 649         iwl4965_rx_queue_update_write_ptr(priv, rxq);
 650
 651         spin_unlock_irqrestore(&priv->lock, flags);
 652
 653         /* Allocate and init all Tx and Command queues */
 654         rc = iwl4965_txq_ctx_reset(priv);
 655         if (rc)
 656                 return rc;
 657
 658         if (priv->eeprom.sku_cap & EEPROM_SKU_CAP_SW_RF_KILL_ENABLE)
 659                 IWL_DEBUG_RF_KILL("SW RF KILL supported in EEPROM.\n");
 660
 661         if (priv->eeprom.sku_cap & EEPROM_SKU_CAP_HW_RF_KILL_ENABLE)
 662                 IWL_DEBUG_RF_KILL("HW RF KILL supported in EEPROM.\n");
 663
 664         set_bit(STATUS_INIT, &priv->status);
 665
 666         return 0;
 667 }
 668
 669 int iwl4965_hw_nic_stop_master(struct iwl4965_priv *priv)
 670 {
 671         int rc = 0;
 672         u32 reg_val;
 673         unsigned long flags;
 674
 675         spin_lock_irqsave(&priv->lock, flags);
 676
 677         /* set stop master bit */
 678         iwl4965_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
 679
 680         reg_val = iwl4965_read32(priv, CSR_GP_CNTRL);
 681
 682         if (CSR_GP_CNTRL_REG_FLAG_MAC_POWER_SAVE ==
 683             (reg_val & CSR_GP_CNTRL_REG_MSK_POWER_SAVE_TYPE))
 684                 IWL_DEBUG_INFO("Card in power save, master is already "
 685                                "stopped\n");
 686         else {
 687                 rc = iwl4965_poll_bit(priv, CSR_RESET,
 688                                   CSR_RESET_REG_FLAG_MASTER_DISABLED,
 689                                   CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
 690                 if (rc < 0) {
 691                         spin_unlock_irqrestore(&priv->lock, flags);
 692                         return rc;
 693                 }
 694         }
 695
 696         spin_unlock_irqrestore(&priv->lock, flags);
 697         IWL_DEBUG_INFO("stop master\n");
 698
 699         return rc;
 700 }
 701
 702 /**
 703  * iwl4965_hw_txq_ctx_stop - Stop all Tx DMA channels, free Tx queue memory
 704  */
 705 void iwl4965_hw_txq_ctx_stop(struct iwl4965_priv *priv)
 706 {
 707
 708         int txq_id;
 709         unsigned long flags;
 710
 711         /* Stop each Tx DMA channel, and wait for it to be idle */
 712         for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++) {
 713                 spin_lock_irqsave(&priv->lock, flags);
 714                 if (iwl4965_grab_nic_access(priv)) {
 715                         spin_unlock_irqrestore(&priv->lock, flags);
 716                         continue;
 717                 }
 718
 719                 iwl4965_write_direct32(priv,
 720                                      IWL_FH_TCSR_CHNL_TX_CONFIG_REG(txq_id),
 721                                      0x0);
 722                 iwl4965_poll_direct_bit(priv, IWL_FH_TSSR_TX_STATUS_REG,
 723                                         IWL_FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE
 724                                         (txq_id), 200);
 725                 iwl4965_release_nic_access(priv);
 726                 spin_unlock_irqrestore(&priv->lock, flags);
 727         }
 728
 729         /* Deallocate memory for all Tx queues */
 730         iwl4965_hw_txq_ctx_free(priv);
 731 }
 732
 733 int iwl4965_hw_nic_reset(struct iwl4965_priv *priv)
 734 {
 735         int rc = 0;
 736         unsigned long flags;
 737
 738         iwl4965_hw_nic_stop_master(priv);
 739
 740         spin_lock_irqsave(&priv->lock, flags);
 741
 742         iwl4965_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
 743
 744         udelay(10);
 745
 746         iwl4965_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 747         rc = iwl4965_poll_bit(priv, CSR_RESET,
 748                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
 749                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25);
 750
 751         udelay(10);
 752
 753         rc = iwl4965_grab_nic_access(priv);
 754         if (!rc) {
 755                 iwl4965_write_prph(priv, APMG_CLK_EN_REG,
 756                                          APMG_CLK_VAL_DMA_CLK_RQT |
 757                                          APMG_CLK_VAL_BSM_CLK_RQT);
 758
 759                 udelay(10);
 760
 761                 iwl4965_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
 762                                 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
 763
 764                 iwl4965_release_nic_access(priv);
 765         }
 766
 767         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
 768         wake_up_interruptible(&priv->wait_command_queue);
 769
 770         spin_unlock_irqrestore(&priv->lock, flags);
 771
 772         return rc;
 773
 774 }
 775
 776 #define REG_RECALIB_PERIOD (60)
 777
 778 /**
 779  * iwl4965_bg_statistics_periodic - Timer callback to queue statistics
 780  *
 781  * This callback is provided in order to queue the statistics_work
 782  * in work_queue context (v. softirq)
 783  *
 784  * This timer function is continually reset to execute within
 785  * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
 786  * was received.  We need to ensure we receive the statistics in order
 787  * to update the temperature used for calibrating the TXPOWER.  However,
 788  * we can't send the statistics command from softirq context (which
 789  * is the context which timers run at) so we have to queue off the
 790  * statistics_work to actually send the command to the hardware.
 791  */
 792 static void iwl4965_bg_statistics_periodic(unsigned long data)
 793 {
 794         struct iwl4965_priv *priv = (struct iwl4965_priv *)data;
 795
 796         queue_work(priv->workqueue, &priv->statistics_work);
 797 }
 798
 799 /**
 800  * iwl4965_bg_statistics_work - Send the statistics request to the hardware.
 801  *
 802  * This is queued by iwl4965_bg_statistics_periodic.
 803  */
 804 static void iwl4965_bg_statistics_work(struct work_struct *work)
 805 {
 806         struct iwl4965_priv *priv = container_of(work, struct iwl4965_priv,
 807                                              statistics_work);
 808
 809         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 810                 return;
 811
 812         mutex_lock(&priv->mutex);
 813         iwl4965_send_statistics_request(priv);
 814         mutex_unlock(&priv->mutex);
 815 }
 816
 817 #define CT_LIMIT_CONST          259
 818 #define TM_CT_KILL_THRESHOLD    110
 819
 820 void iwl4965_rf_kill_ct_config(struct iwl4965_priv *priv)
 821 {
 822         struct iwl4965_ct_kill_config cmd;
 823         u32 R1, R2, R3;
 824         u32 temp_th;
 825         u32 crit_temperature;
 826         unsigned long flags;
 827         int rc = 0;
 828
 829         spin_lock_irqsave(&priv->lock, flags);
 830         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_CLR,
 831                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
 832         spin_unlock_irqrestore(&priv->lock, flags);
 833
 834         if (priv->statistics.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK) {
 835                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[1]);
 836                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[1]);
 837                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[1]);
 838         } else {
 839                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[0]);
 840                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[0]);
 841                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[0]);
 842         }
 843
 844         temp_th = CELSIUS_TO_KELVIN(TM_CT_KILL_THRESHOLD);
 845
 846         crit_temperature = ((temp_th * (R3-R1))/CT_LIMIT_CONST) + R2;
 847         cmd.critical_temperature_R =  cpu_to_le32(crit_temperature);
 848         rc = iwl4965_send_cmd_pdu(priv,
 849                               REPLY_CT_KILL_CONFIG_CMD, sizeof(cmd), &cmd);
 850         if (rc)
 851                 IWL_ERROR("REPLY_CT_KILL_CONFIG_CMD failed\n");
 852         else
 853                 IWL_DEBUG_INFO("REPLY_CT_KILL_CONFIG_CMD succeeded\n");
 854 }
 855
 856 #ifdef CONFIG_IWL4965_SENSITIVITY
 857
 858 /* "false alarms" are signals that our DSP tries to lock onto,
 859  *   but then determines that they are either noise, or transmissions
 860  *   from a distant wireless network (also "noise", really) that get
 861  *   "stepped on" by stronger transmissions within our own network.
 862  * This algorithm attempts to set a sensitivity level that is high
 863  *   enough to receive all of our own network traffic, but not so
 864  *   high that our DSP gets too busy trying to lock onto non-network
 865  *   activity/noise. */
 866 static int iwl4965_sens_energy_cck(struct iwl4965_priv *priv,
 867                                    u32 norm_fa,
 868                                    u32 rx_enable_time,
 869                                    struct statistics_general_data *rx_info)
 870 {
 871         u32 max_nrg_cck = 0;
 872         int i = 0;
 873         u8 max_silence_rssi = 0;
 874         u32 silence_ref = 0;
 875         u8 silence_rssi_a = 0;
 876         u8 silence_rssi_b = 0;
 877         u8 silence_rssi_c = 0;
 878         u32 val;
 879
 880         /* "false_alarms" values below are cross-multiplications to assess the
 881          *   numbers of false alarms within the measured period of actual Rx
 882          *   (Rx is off when we're txing), vs the min/max expected false alarms
 883          *   (some should be expected if rx is sensitive enough) in a
 884          *   hypothetical listening period of 200 time units (TU), 204.8 msec:
 885          *
 886          * MIN_FA/fixed-time < false_alarms/actual-rx-time < MAX_FA/beacon-time
 887          *
 888          * */
 889         u32 false_alarms = norm_fa * 200 * 1024;
 890         u32 max_false_alarms = MAX_FA_CCK * rx_enable_time;
 891         u32 min_false_alarms = MIN_FA_CCK * rx_enable_time;
 892         struct iwl4965_sensitivity_data *data = NULL;
 893
 894         data = &(priv->sensitivity_data);
 895
 896         data->nrg_auto_corr_silence_diff = 0;
 897
 898         /* Find max silence rssi among all 3 receivers.
 899          * This is background noise, which may include transmissions from other
 900          *    networks, measured during silence before our network's beacon */
 901         silence_rssi_a = (u8)((rx_info->beacon_silence_rssi_a &
 902                             ALL_BAND_FILTER) >> 8);
 903         silence_rssi_b = (u8)((rx_info->beacon_silence_rssi_b &
 904                             ALL_BAND_FILTER) >> 8);
 905         silence_rssi_c = (u8)((rx_info->beacon_silence_rssi_c &
 906                             ALL_BAND_FILTER) >> 8);
 907
 908         val = max(silence_rssi_b, silence_rssi_c);
 909         max_silence_rssi = max(silence_rssi_a, (u8) val);
 910
 911         /* Store silence rssi in 20-beacon history table */
 912         data->nrg_silence_rssi[data->nrg_silence_idx] = max_silence_rssi;
 913         data->nrg_silence_idx++;
 914         if (data->nrg_silence_idx >= NRG_NUM_PREV_STAT_L)
 915                 data->nrg_silence_idx = 0;
 916
 917         /* Find max silence rssi across 20 beacon history */
 918         for (i = 0; i < NRG_NUM_PREV_STAT_L; i++) {
 919                 val = data->nrg_silence_rssi[i];
 920                 silence_ref = max(silence_ref, val);
 921         }
 922         IWL_DEBUG_CALIB("silence a %u, b %u, c %u, 20-bcn max %u\n",
 923                         silence_rssi_a, silence_rssi_b, silence_rssi_c,
 924                         silence_ref);
 925
 926         /* Find max rx energy (min value!) among all 3 receivers,
 927          *   measured during beacon frame.
 928          * Save it in 10-beacon history table. */
 929         i = data->nrg_energy_idx;
 930         val = min(rx_info->beacon_energy_b, rx_info->beacon_energy_c);
 931         data->nrg_value[i] = min(rx_info->beacon_energy_a, val);
 932
 933         data->nrg_energy_idx++;
 934         if (data->nrg_energy_idx >= 10)
 935                 data->nrg_energy_idx = 0;
 936
 937         /* Find min rx energy (max value) across 10 beacon history.
 938          * This is the minimum signal level that we want to receive well.
 939          * Add backoff (margin so we don't miss slightly lower energy frames).
 940          * This establishes an upper bound (min value) for energy threshold. */
 941         max_nrg_cck = data->nrg_value[0];
 942         for (i = 1; i < 10; i++)
 943                 max_nrg_cck = (u32) max(max_nrg_cck, (data->nrg_value[i]));
 944         max_nrg_cck += 6;
 945
 946         IWL_DEBUG_CALIB("rx energy a %u, b %u, c %u, 10-bcn max/min %u\n",
 947                         rx_info->beacon_energy_a, rx_info->beacon_energy_b,
 948                         rx_info->beacon_energy_c, max_nrg_cck - 6);
 949
 950         /* Count number of consecutive beacons with fewer-than-desired
 951          *   false alarms. */
 952         if (false_alarms < min_false_alarms)
 953                 data->num_in_cck_no_fa++;
 954         else
 955                 data->num_in_cck_no_fa = 0;
 956         IWL_DEBUG_CALIB("consecutive bcns with few false alarms = %u\n",
 957                         data->num_in_cck_no_fa);
 958
 959         /* If we got too many false alarms this time, reduce sensitivity */
 960         if (false_alarms > max_false_alarms) {
 961                 IWL_DEBUG_CALIB("norm FA %u > max FA %u\n",
 962                              false_alarms, max_false_alarms);
 963                 IWL_DEBUG_CALIB("... reducing sensitivity\n");
 964                 data->nrg_curr_state = IWL_FA_TOO_MANY;
 965
 966                 if (data->auto_corr_cck > AUTO_CORR_MAX_TH_CCK) {
 967                         /* Store for "fewer than desired" on later beacon */
 968                         data->nrg_silence_ref = silence_ref;
 969
 970                         /* increase energy threshold (reduce nrg value)
 971                          *   to decrease sensitivity */
 972                         if (data->nrg_th_cck > (NRG_MAX_CCK + NRG_STEP_CCK))
 973                                 data->nrg_th_cck = data->nrg_th_cck
 974                                                          - NRG_STEP_CCK;
 975                 }
 976
 977                 /* increase auto_corr values to decrease sensitivity */
 978                 if (data->auto_corr_cck < AUTO_CORR_MAX_TH_CCK)
 979                         data->auto_corr_cck = AUTO_CORR_MAX_TH_CCK + 1;
 980                 else {
 981                         val = data->auto_corr_cck + AUTO_CORR_STEP_CCK;
 982                         data->auto_corr_cck = min((u32)AUTO_CORR_MAX_CCK, val);
 983                 }
 984                 val = data->auto_corr_cck_mrc + AUTO_CORR_STEP_CCK;
 985                 data->auto_corr_cck_mrc = min((u32)AUTO_CORR_MAX_CCK_MRC, val);
 986
 987         /* Else if we got fewer than desired, increase sensitivity */
 988         } else if (false_alarms < min_false_alarms) {
 989                 data->nrg_curr_state = IWL_FA_TOO_FEW;
 990
 991                 /* Compare silence level with silence level for most recent
 992                  *   healthy number or too many false alarms */
 993                 data->nrg_auto_corr_silence_diff = (s32)data->nrg_silence_ref -
 994                                                    (s32)silence_ref;
 995
 996                 IWL_DEBUG_CALIB("norm FA %u < min FA %u, silence diff %d\n",
 997                          false_alarms, min_false_alarms,
 998                          data->nrg_auto_corr_silence_diff);
 999
1000                 /* Increase value to increase sensitivity, but only if:
1001                  * 1a) previous beacon did *not* have *too many* false alarms
1002                  * 1b) AND there's a significant difference in Rx levels
1003                  *      from a previous beacon with too many, or healthy # FAs
1004                  * OR 2) We've seen a lot of beacons (100) with too few
1005                  *       false alarms */
1006                 if ((data->nrg_prev_state != IWL_FA_TOO_MANY) &&
1007                         ((data->nrg_auto_corr_silence_diff > NRG_DIFF) ||
1008                         (data->num_in_cck_no_fa > MAX_NUMBER_CCK_NO_FA))) {
1009
1010                         IWL_DEBUG_CALIB("... increasing sensitivity\n");
1011                         /* Increase nrg value to increase sensitivity */
1012                         val = data->nrg_th_cck + NRG_STEP_CCK;
1013                         data->nrg_th_cck = min((u32)NRG_MIN_CCK, val);
1014
1015                         /* Decrease auto_corr values to increase sensitivity */
1016                         val = data->auto_corr_cck - AUTO_CORR_STEP_CCK;
1017                         data->auto_corr_cck = max((u32)AUTO_CORR_MIN_CCK, val);
1018
1019                         val = data->auto_corr_cck_mrc - AUTO_CORR_STEP_CCK;
1020                         data->auto_corr_cck_mrc =
1021                                          max((u32)AUTO_CORR_MIN_CCK_MRC, val);
1022
1023                 } else
1024                         IWL_DEBUG_CALIB("... but not changing sensitivity\n");
1025
1026         /* Else we got a healthy number of false alarms, keep status quo */
1027         } else {
1028                 IWL_DEBUG_CALIB(" FA in safe zone\n");
1029                 data->nrg_curr_state = IWL_FA_GOOD_RANGE;
1030
1031                 /* Store for use in "fewer than desired" with later beacon */
1032                 data->nrg_silence_ref = silence_ref;
1033
1034                 /* If previous beacon had too many false alarms,
1035                  *   give it some extra margin by reducing sensitivity again
1036                  *   (but don't go below measured energy of desired Rx) */
1037                 if (IWL_FA_TOO_MANY == data->nrg_prev_state) {
1038                         IWL_DEBUG_CALIB("... increasing margin\n");
1039                         data->nrg_th_cck -= NRG_MARGIN;
1040                 }
1041         }
1042
1043         /* Make sure the energy threshold does not go above the measured
1044          * energy of the desired Rx signals (reduced by backoff margin),
1045          * or else we might start missing Rx frames.
1046          * Lower value is higher energy, so we use max()!
1047          */
1048         data->nrg_th_cck = max(max_nrg_cck, data->nrg_th_cck);
1049         IWL_DEBUG_CALIB("new nrg_th_cck %u\n", data->nrg_th_cck);
1050
1051         data->nrg_prev_state = data->nrg_curr_state;
1052
1053         return 0;
1054 }
1055
1056
1057 static int iwl4965_sens_auto_corr_ofdm(struct iwl4965_priv *priv,
1058                                        u32 norm_fa,
1059                                        u32 rx_enable_time)
1060 {
1061         u32 val;
1062         u32 false_alarms = norm_fa * 200 * 1024;
1063         u32 max_false_alarms = MAX_FA_OFDM * rx_enable_time;
1064         u32 min_false_alarms = MIN_FA_OFDM * rx_enable_time;
1065         struct iwl4965_sensitivity_data *data = NULL;
1066
1067         data = &(priv->sensitivity_data);
1068
1069         /* If we got too many false alarms this time, reduce sensitivity */
1070         if (false_alarms > max_false_alarms) {
1071
1072                 IWL_DEBUG_CALIB("norm FA %u > max FA %u)\n",
1073                              false_alarms, max_false_alarms);
1074
1075                 val = data->auto_corr_ofdm + AUTO_CORR_STEP_OFDM;
1076                 data->auto_corr_ofdm =
1077                                 min((u32)AUTO_CORR_MAX_OFDM, val);
1078
1079                 val = data->auto_corr_ofdm_mrc + AUTO_CORR_STEP_OFDM;
1080                 data->auto_corr_ofdm_mrc =
1081                                 min((u32)AUTO_CORR_MAX_OFDM_MRC, val);
1082
1083                 val = data->auto_corr_ofdm_x1 + AUTO_CORR_STEP_OFDM;
1084                 data->auto_corr_ofdm_x1 =
1085                                 min((u32)AUTO_CORR_MAX_OFDM_X1, val);
1086
1087                 val = data->auto_corr_ofdm_mrc_x1 + AUTO_CORR_STEP_OFDM;
1088                 data->auto_corr_ofdm_mrc_x1 =
1089                                 min((u32)AUTO_CORR_MAX_OFDM_MRC_X1, val);
1090         }
1091
1092         /* Else if we got fewer than desired, increase sensitivity */
1093         else if (false_alarms < min_false_alarms) {
1094
1095                 IWL_DEBUG_CALIB("norm FA %u < min FA %u\n",
1096                              false_alarms, min_false_alarms);
1097
1098                 val = data->auto_corr_ofdm - AUTO_CORR_STEP_OFDM;
1099                 data->auto_corr_ofdm =
1100                                 max((u32)AUTO_CORR_MIN_OFDM, val);
1101
1102                 val = data->auto_corr_ofdm_mrc - AUTO_CORR_STEP_OFDM;
1103                 data->auto_corr_ofdm_mrc =
1104                                 max((u32)AUTO_CORR_MIN_OFDM_MRC, val);
1105
1106                 val = data->auto_corr_ofdm_x1 - AUTO_CORR_STEP_OFDM;
1107                 data->auto_corr_ofdm_x1 =
1108                                 max((u32)AUTO_CORR_MIN_OFDM_X1, val);
1109
1110                 val = data->auto_corr_ofdm_mrc_x1 - AUTO_CORR_STEP_OFDM;
1111                 data->auto_corr_ofdm_mrc_x1 =
1112                                 max((u32)AUTO_CORR_MIN_OFDM_MRC_X1, val);
1113         }
1114
1115         else
1116                 IWL_DEBUG_CALIB("min FA %u < norm FA %u < max FA %u OK\n",
1117                          min_false_alarms, false_alarms, max_false_alarms);
1118
1119         return 0;
1120 }
1121
1122 static int iwl4965_sensitivity_callback(struct iwl4965_priv *priv,
1123                                     struct iwl4965_cmd *cmd, struct sk_buff *skb)
1124 {
1125         /* We didn't cache the SKB; let the caller free it */
1126         return 1;
1127 }
1128
1129 /* Prepare a SENSITIVITY_CMD, send to uCode if values have changed */
1130 static int iwl4965_sensitivity_write(struct iwl4965_priv *priv, u8 flags)
1131 {
1132         int rc = 0;
1133         struct iwl4965_sensitivity_cmd cmd ;
1134         struct iwl4965_sensitivity_data *data = NULL;
1135         struct iwl4965_host_cmd cmd_out = {
1136                 .id = SENSITIVITY_CMD,
1137                 .len = sizeof(struct iwl4965_sensitivity_cmd),
1138                 .meta.flags = flags,
1139                 .data = &cmd,
1140         };
1141
1142         data = &(priv->sensitivity_data);
1143
1144         memset(&cmd, 0, sizeof(cmd));
1145
1146         cmd.table[HD_AUTO_CORR32_X4_TH_ADD_MIN_INDEX] =
1147                                 cpu_to_le16((u16)data->auto_corr_ofdm);
1148         cmd.table[HD_AUTO_CORR32_X4_TH_ADD_MIN_MRC_INDEX] =
1149                                 cpu_to_le16((u16)data->auto_corr_ofdm_mrc);
1150         cmd.table[HD_AUTO_CORR32_X1_TH_ADD_MIN_INDEX] =
1151                                 cpu_to_le16((u16)data->auto_corr_ofdm_x1);
1152         cmd.table[HD_AUTO_CORR32_X1_TH_ADD_MIN_MRC_INDEX] =
1153                                 cpu_to_le16((u16)data->auto_corr_ofdm_mrc_x1);
1154
1155         cmd.table[HD_AUTO_CORR40_X4_TH_ADD_MIN_INDEX] =
1156                                 cpu_to_le16((u16)data->auto_corr_cck);
1157         cmd.table[HD_AUTO_CORR40_X4_TH_ADD_MIN_MRC_INDEX] =
1158                                 cpu_to_le16((u16)data->auto_corr_cck_mrc);
1159
1160         cmd.table[HD_MIN_ENERGY_CCK_DET_INDEX] =
1161                                 cpu_to_le16((u16)data->nrg_th_cck);
1162         cmd.table[HD_MIN_ENERGY_OFDM_DET_INDEX] =
1163                                 cpu_to_le16((u16)data->nrg_th_ofdm);
1164
1165         cmd.table[HD_BARKER_CORR_TH_ADD_MIN_INDEX] =
1166                                 __constant_cpu_to_le16(190);
1167         cmd.table[HD_BARKER_CORR_TH_ADD_MIN_MRC_INDEX] =
1168                                 __constant_cpu_to_le16(390);
1169         cmd.table[HD_OFDM_ENERGY_TH_IN_INDEX] =
1170                                 __constant_cpu_to_le16(62);
1171
1172         IWL_DEBUG_CALIB("ofdm: ac %u mrc %u x1 %u mrc_x1 %u thresh %u\n",
1173                         data->auto_corr_ofdm, data->auto_corr_ofdm_mrc,
1174                         data->auto_corr_ofdm_x1, data->auto_corr_ofdm_mrc_x1,
1175                         data->nrg_th_ofdm);
1176
1177         IWL_DEBUG_CALIB("cck: ac %u mrc %u thresh %u\n",
1178                         data->auto_corr_cck, data->auto_corr_cck_mrc,
1179                         data->nrg_th_cck);
1180
1181         /* Update uCode's "work" table, and copy it to DSP */
1182         cmd.control = SENSITIVITY_CMD_CONTROL_WORK_TABLE;
1183
1184         if (flags & CMD_ASYNC)
1185                 cmd_out.meta.u.callback = iwl4965_sensitivity_callback;
1186
1187         /* Don't send command to uCode if nothing has changed */
1188         if (!memcmp(&cmd.table[0], &(priv->sensitivity_tbl[0]),
1189                     sizeof(u16)*HD_TABLE_SIZE)) {
1190                 IWL_DEBUG_CALIB("No change in SENSITIVITY_CMD\n");
1191                 return 0;
1192         }
1193
1194         /* Copy table for comparison next time */
1195         memcpy(&(priv->sensitivity_tbl[0]), &(cmd.table[0]),
1196                sizeof(u16)*HD_TABLE_SIZE);
1197
1198         rc = iwl4965_send_cmd(priv, &cmd_out);
1199         if (!rc) {
1200                 IWL_DEBUG_CALIB("SENSITIVITY_CMD succeeded\n");
1201                 return rc;
1202         }
1203
1204         return 0;
1205 }
1206
1207 void iwl4965_init_sensitivity(struct iwl4965_priv *priv, u8 flags, u8 force)
1208 {
1209         int rc = 0;
1210         int i;
1211         struct iwl4965_sensitivity_data *data = NULL;
1212
1213         IWL_DEBUG_CALIB("Start iwl4965_init_sensitivity\n");
1214
1215         if (force)
1216                 memset(&(priv->sensitivity_tbl[0]), 0,
1217                         sizeof(u16)*HD_TABLE_SIZE);
1218
1219         /* Clear driver's sensitivity algo data */
1220         data = &(priv->sensitivity_data);
1221         memset(data, 0, sizeof(struct iwl4965_sensitivity_data));
1222
1223         data->num_in_cck_no_fa = 0;
1224         data->nrg_curr_state = IWL_FA_TOO_MANY;
1225         data->nrg_prev_state = IWL_FA_TOO_MANY;
1226         data->nrg_silence_ref = 0;
1227         data->nrg_silence_idx = 0;
1228         data->nrg_energy_idx = 0;
1229
1230         for (i = 0; i < 10; i++)
1231                 data->nrg_value[i] = 0;
1232
1233         for (i = 0; i < NRG_NUM_PREV_STAT_L; i++)
1234                 data->nrg_silence_rssi[i] = 0;
1235
1236         data->auto_corr_ofdm = 90;
1237         data->auto_corr_ofdm_mrc = 170;
1238         data->auto_corr_ofdm_x1  = 105;
1239         data->auto_corr_ofdm_mrc_x1 = 220;
1240         data->auto_corr_cck = AUTO_CORR_CCK_MIN_VAL_DEF;
1241         data->auto_corr_cck_mrc = 200;
1242         data->nrg_th_cck = 100;
1243         data->nrg_th_ofdm = 100;
1244
1245         data->last_bad_plcp_cnt_ofdm = 0;
1246         data->last_fa_cnt_ofdm = 0;
1247         data->last_bad_plcp_cnt_cck = 0;
1248         data->last_fa_cnt_cck = 0;
1249
1250         /* Clear prior Sensitivity command data to force send to uCode */
1251         if (force)
1252                 memset(&(priv->sensitivity_tbl[0]), 0,
1253                     sizeof(u16)*HD_TABLE_SIZE);
1254
1255         rc |= iwl4965_sensitivity_write(priv, flags);
1256         IWL_DEBUG_CALIB("<<return 0x%X\n", rc);
1257
1258         return;
1259 }
1260
1261
1262 /* Reset differential Rx gains in NIC to prepare for chain noise calibration.
1263  * Called after every association, but this runs only once!
1264  *  ... once chain noise is calibrated the first time, it's good forever.  */
1265 void iwl4965_chain_noise_reset(struct iwl4965_priv *priv)
1266 {
1267         struct iwl4965_chain_noise_data *data = NULL;
1268         int rc = 0;
1269
1270         data = &(priv->chain_noise_data);
1271         if ((data->state == IWL_CHAIN_NOISE_ALIVE) && iwl4965_is_associated(priv)) {
1272                 struct iwl4965_calibration_cmd cmd;
1273
1274                 memset(&cmd, 0, sizeof(cmd));
1275                 cmd.opCode = PHY_CALIBRATE_DIFF_GAIN_CMD;
1276                 cmd.diff_gain_a = 0;
1277                 cmd.diff_gain_b = 0;
1278                 cmd.diff_gain_c = 0;
1279                 rc = iwl4965_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
1280                                  sizeof(cmd), &cmd);
1281                 msleep(4);
1282                 data->state = IWL_CHAIN_NOISE_ACCUMULATE;
1283                 IWL_DEBUG_CALIB("Run chain_noise_calibrate\n");
1284         }
1285         return;
1286 }
1287
1288 /*
1289  * Accumulate 20 beacons of signal and noise statistics for each of
1290  *   3 receivers/antennas/rx-chains, then figure out:
1291  * 1)  Which antennas are connected.
1292  * 2)  Differential rx gain settings to balance the 3 receivers.
1293  */
1294 static void iwl4965_noise_calibration(struct iwl4965_priv *priv,
1295                                       struct iwl4965_notif_statistics *stat_resp)
1296 {
1297         struct iwl4965_chain_noise_data *data = NULL;
1298         int rc = 0;
1299
1300         u32 chain_noise_a;
1301         u32 chain_noise_b;
1302         u32 chain_noise_c;
1303         u32 chain_sig_a;
1304         u32 chain_sig_b;
1305         u32 chain_sig_c;
1306         u32 average_sig[NUM_RX_CHAINS] = {INITIALIZATION_VALUE};
1307         u32 average_noise[NUM_RX_CHAINS] = {INITIALIZATION_VALUE};
1308         u32 max_average_sig;
1309         u16 max_average_sig_antenna_i;
1310         u32 min_average_noise = MIN_AVERAGE_NOISE_MAX_VALUE;
1311         u16 min_average_noise_antenna_i = INITIALIZATION_VALUE;
1312         u16 i = 0;
1313         u16 chan_num = INITIALIZATION_VALUE;
1314         u32 band = INITIALIZATION_VALUE;
1315         u32 active_chains = 0;
1316         unsigned long flags;
1317         struct statistics_rx_non_phy *rx_info = &(stat_resp->rx.general);
1318
1319         data = &(priv->chain_noise_data);
1320
1321         /* Accumulate just the first 20 beacons after the first association,
1322          *   then we're done forever. */
1323         if (data->state != IWL_CHAIN_NOISE_ACCUMULATE) {
1324                 if (data->state == IWL_CHAIN_NOISE_ALIVE)
1325                         IWL_DEBUG_CALIB("Wait for noise calib reset\n");
1326                 return;
1327         }
1328
1329         spin_lock_irqsave(&priv->lock, flags);
1330         if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) {
1331                 IWL_DEBUG_CALIB(" << Interference data unavailable\n");
1332                 spin_unlock_irqrestore(&priv->lock, flags);
1333                 return;
1334         }
1335
1336         band = (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) ? 0 : 1;
1337         chan_num = le16_to_cpu(priv->staging_rxon.channel);
1338
1339         /* Make sure we accumulate data for just the associated channel
1340          *   (even if scanning). */
1341         if ((chan_num != (le32_to_cpu(stat_resp->flag) >> 16)) ||
1342             ((STATISTICS_REPLY_FLG_BAND_24G_MSK ==
1343              (stat_resp->flag & STATISTICS_REPLY_FLG_BAND_24G_MSK)) && band)) {
1344                 IWL_DEBUG_CALIB("Stats not from chan=%d, band=%d\n",
1345                                 chan_num, band);
1346                 spin_unlock_irqrestore(&priv->lock, flags);
1347                 return;
1348         }
1349
1350         /* Accumulate beacon statistics values across 20 beacons */
1351         chain_noise_a = le32_to_cpu(rx_info->beacon_silence_rssi_a) &
1352                                 IN_BAND_FILTER;
1353         chain_noise_b = le32_to_cpu(rx_info->beacon_silence_rssi_b) &
1354                                 IN_BAND_FILTER;
1355         chain_noise_c = le32_to_cpu(rx_info->beacon_silence_rssi_c) &
1356                                 IN_BAND_FILTER;
1357
1358         chain_sig_a = le32_to_cpu(rx_info->beacon_rssi_a) & IN_BAND_FILTER;
1359         chain_sig_b = le32_to_cpu(rx_info->beacon_rssi_b) & IN_BAND_FILTER;
1360         chain_sig_c = le32_to_cpu(rx_info->beacon_rssi_c) & IN_BAND_FILTER;
1361
1362         spin_unlock_irqrestore(&priv->lock, flags);
1363
1364         data->beacon_count++;
1365
1366         data->chain_noise_a = (chain_noise_a + data->chain_noise_a);
1367         data->chain_noise_b = (chain_noise_b + data->chain_noise_b);
1368         data->chain_noise_c = (chain_noise_c + data->chain_noise_c);
1369
1370         data->chain_signal_a = (chain_sig_a + data->chain_signal_a);
1371         data->chain_signal_b = (chain_sig_b + data->chain_signal_b);
1372         data->chain_signal_c = (chain_sig_c + data->chain_signal_c);
1373
1374         IWL_DEBUG_CALIB("chan=%d, band=%d, beacon=%d\n", chan_num, band,
1375                         data->beacon_count);
1376         IWL_DEBUG_CALIB("chain_sig: a %d b %d c %d\n",
1377                         chain_sig_a, chain_sig_b, chain_sig_c);
1378         IWL_DEBUG_CALIB("chain_noise: a %d b %d c %d\n",
1379                         chain_noise_a, chain_noise_b, chain_noise_c);
1380
1381         /* If this is the 20th beacon, determine:
1382          * 1)  Disconnected antennas (using signal strengths)
1383          * 2)  Differential gain (using silence noise) to balance receivers */
1384         if (data->beacon_count == CAL_NUM_OF_BEACONS) {
1385
1386                 /* Analyze signal for disconnected antenna */
1387                 average_sig[0] = (data->chain_signal_a) / CAL_NUM_OF_BEACONS;
1388                 average_sig[1] = (data->chain_signal_b) / CAL_NUM_OF_BEACONS;
1389                 average_sig[2] = (data->chain_signal_c) / CAL_NUM_OF_BEACONS;
1390
1391                 if (average_sig[0] >= average_sig[1]) {
1392                         max_average_sig = average_sig[0];
1393                         max_average_sig_antenna_i = 0;
1394                         active_chains = (1 << max_average_sig_antenna_i);
1395                 } else {
1396                         max_average_sig = average_sig[1];
1397                         max_average_sig_antenna_i = 1;
1398                         active_chains = (1 << max_average_sig_antenna_i);
1399                 }
1400
1401                 if (average_sig[2] >= max_average_sig) {
1402                         max_average_sig = average_sig[2];
1403                         max_average_sig_antenna_i = 2;
1404                         active_chains = (1 << max_average_sig_antenna_i);
1405                 }
1406
1407                 IWL_DEBUG_CALIB("average_sig: a %d b %d c %d\n",
1408                              average_sig[0], average_sig[1], average_sig[2]);
1409                 IWL_DEBUG_CALIB("max_average_sig = %d, antenna %d\n",
1410                              max_average_sig, max_average_sig_antenna_i);
1411
1412                 /* Compare signal strengths for all 3 receivers. */
1413                 for (i = 0; i < NUM_RX_CHAINS; i++) {
1414                         if (i != max_average_sig_antenna_i) {
1415                                 s32 rssi_delta = (max_average_sig -
1416                                                   average_sig[i]);
1417
1418                                 /* If signal is very weak, compared with
1419                                  * strongest, mark it as disconnected. */
1420                                 if (rssi_delta > MAXIMUM_ALLOWED_PATHLOSS)
1421                                         data->disconn_array[i] = 1;
1422                                 else
1423                                         active_chains |= (1 << i);
1424                         IWL_DEBUG_CALIB("i = %d  rssiDelta = %d  "
1425                                      "disconn_array[i] = %d\n",
1426                                      i, rssi_delta, data->disconn_array[i]);
1427                         }
1428                 }
1429
1430                 /*If both chains A & B are disconnected -
1431                  * connect B and leave A as is */
1432                 if (data->disconn_array[CHAIN_A] &&
1433                     data->disconn_array[CHAIN_B]) {
1434                         data->disconn_array[CHAIN_B] = 0;
1435                         active_chains |= (1 << CHAIN_B);
1436                         IWL_DEBUG_CALIB("both A & B chains are disconnected! "
1437                                      "W/A - declare B as connected\n");
1438                 }
1439
1440                 IWL_DEBUG_CALIB("active_chains (bitwise) = 0x%x\n",
1441                                 active_chains);
1442
1443                 /* Save for use within RXON, TX, SCAN commands, etc. */
1444                 priv->valid_antenna = active_chains;
1445
1446                 /* Analyze noise for rx balance */
1447                 average_noise[0] = ((data->chain_noise_a)/CAL_NUM_OF_BEACONS);
1448                 average_noise[1] = ((data->chain_noise_b)/CAL_NUM_OF_BEACONS);
1449                 average_noise[2] = ((data->chain_noise_c)/CAL_NUM_OF_BEACONS);
1450
1451                 for (i = 0; i < NUM_RX_CHAINS; i++) {
1452                         if (!(data->disconn_array[i]) &&
1453                            (average_noise[i] <= min_average_noise)) {
1454                                 /* This means that chain i is active and has
1455                                  * lower noise values so far: */
1456                                 min_average_noise = average_noise[i];
1457                                 min_average_noise_antenna_i = i;
1458                         }
1459                 }
1460
1461                 data->delta_gain_code[min_average_noise_antenna_i] = 0;
1462
1463                 IWL_DEBUG_CALIB("average_noise: a %d b %d c %d\n",
1464                                 average_noise[0], average_noise[1],
1465                                 average_noise[2]);
1466
1467                 IWL_DEBUG_CALIB("min_average_noise = %d, antenna %d\n",
1468                                 min_average_noise, min_average_noise_antenna_i);
1469
1470                 for (i = 0; i < NUM_RX_CHAINS; i++) {
1471                         s32 delta_g = 0;
1472
1473                         if (!(data->disconn_array[i]) &&
1474                             (data->delta_gain_code[i] ==
1475                              CHAIN_NOISE_DELTA_GAIN_INIT_VAL)) {
1476                                 delta_g = average_noise[i] - min_average_noise;
1477                                 data->delta_gain_code[i] = (u8)((delta_g *
1478                                                                     10) / 15);
1479                                 if (CHAIN_NOISE_MAX_DELTA_GAIN_CODE <
1480                                    data->delta_gain_code[i])
1481                                         data->delta_gain_code[i] =
1482                                           CHAIN_NOISE_MAX_DELTA_GAIN_CODE;
1483
1484                                 data->delta_gain_code[i] =
1485                                         (data->delta_gain_code[i] | (1 << 2));
1486                         } else
1487                                 data->delta_gain_code[i] = 0;
1488                 }
1489                 IWL_DEBUG_CALIB("delta_gain_codes: a %d b %d c %d\n",
1490                              data->delta_gain_code[0],
1491                              data->delta_gain_code[1],
1492                              data->delta_gain_code[2]);
1493
1494                 /* Differential gain gets sent to uCode only once */
1495                 if (!data->radio_write) {
1496                         struct iwl4965_calibration_cmd cmd;
1497                         data->radio_write = 1;
1498
1499                         memset(&cmd, 0, sizeof(cmd));
1500                         cmd.opCode = PHY_CALIBRATE_DIFF_GAIN_CMD;
1501                         cmd.diff_gain_a = data->delta_gain_code[0];
1502                         cmd.diff_gain_b = data->delta_gain_code[1];
1503                         cmd.diff_gain_c = data->delta_gain_code[2];
1504                         rc = iwl4965_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
1505                                               sizeof(cmd), &cmd);
1506                         if (rc)
1507                                 IWL_DEBUG_CALIB("fail sending cmd "
1508                                              "REPLY_PHY_CALIBRATION_CMD \n");
1509
1510                         /* TODO we might want recalculate
1511                          * rx_chain in rxon cmd */
1512
1513                         /* Mark so we run this algo only once! */
1514                         data->state = IWL_CHAIN_NOISE_CALIBRATED;
1515                 }
1516                 data->chain_noise_a = 0;
1517                 data->chain_noise_b = 0;
1518                 data->chain_noise_c = 0;
1519                 data->chain_signal_a = 0;
1520                 data->chain_signal_b = 0;
1521                 data->chain_signal_c = 0;
1522                 data->beacon_count = 0;
1523         }
1524         return;
1525 }
1526
1527 static void iwl4965_sensitivity_calibration(struct iwl4965_priv *priv,
1528                                             struct iwl4965_notif_statistics *resp)
1529 {
1530         int rc = 0;
1531         u32 rx_enable_time;
1532         u32 fa_cck;
1533         u32 fa_ofdm;
1534         u32 bad_plcp_cck;
1535         u32 bad_plcp_ofdm;
1536         u32 norm_fa_ofdm;
1537         u32 norm_fa_cck;
1538         struct iwl4965_sensitivity_data *data = NULL;
1539         struct statistics_rx_non_phy *rx_info = &(resp->rx.general);
1540         struct statistics_rx *statistics = &(resp->rx);
1541         unsigned long flags;
1542         struct statistics_general_data statis;
1543
1544         data = &(priv->sensitivity_data);
1545
1546         if (!iwl4965_is_associated(priv)) {
1547                 IWL_DEBUG_CALIB("<< - not associated\n");
1548                 return;
1549         }
1550
1551         spin_lock_irqsave(&priv->lock, flags);
1552         if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) {
1553                 IWL_DEBUG_CALIB("<< invalid data.\n");
1554                 spin_unlock_irqrestore(&priv->lock, flags);
1555                 return;
1556         }
1557
1558         /* Extract Statistics: */
1559         rx_enable_time = le32_to_cpu(rx_info->channel_load);
1560         fa_cck = le32_to_cpu(statistics->cck.false_alarm_cnt);
1561         fa_ofdm = le32_to_cpu(statistics->ofdm.false_alarm_cnt);
1562         bad_plcp_cck = le32_to_cpu(statistics->cck.plcp_err);
1563         bad_plcp_ofdm = le32_to_cpu(statistics->ofdm.plcp_err);
1564
1565         statis.beacon_silence_rssi_a =
1566                         le32_to_cpu(statistics->general.beacon_silence_rssi_a);
1567         statis.beacon_silence_rssi_b =
1568                         le32_to_cpu(statistics->general.beacon_silence_rssi_b);
1569         statis.beacon_silence_rssi_c =
1570                         le32_to_cpu(statistics->general.beacon_silence_rssi_c);
1571         statis.beacon_energy_a =
1572                         le32_to_cpu(statistics->general.beacon_energy_a);
1573         statis.beacon_energy_b =
1574                         le32_to_cpu(statistics->general.beacon_energy_b);
1575         statis.beacon_energy_c =
1576                         le32_to_cpu(statistics->general.beacon_energy_c);
1577
1578         spin_unlock_irqrestore(&priv->lock, flags);
1579
1580         IWL_DEBUG_CALIB("rx_enable_time = %u usecs\n", rx_enable_time);
1581
1582         if (!rx_enable_time) {
1583                 IWL_DEBUG_CALIB("<< RX Enable Time == 0! \n");
1584                 return;
1585         }
1586
1587         /* These statistics increase monotonically, and do not reset
1588          *   at each beacon.  Calculate difference from last value, or just
1589          *   use the new statistics value if it has reset or wrapped around. */
1590         if (data->last_bad_plcp_cnt_cck > bad_plcp_cck)
1591                 data->last_bad_plcp_cnt_cck = bad_plcp_cck;
1592         else {
1593                 bad_plcp_cck -= data->last_bad_plcp_cnt_cck;
1594                 data->last_bad_plcp_cnt_cck += bad_plcp_cck;
1595         }
1596
1597         if (data->last_bad_plcp_cnt_ofdm > bad_plcp_ofdm)
1598                 data->last_bad_plcp_cnt_ofdm = bad_plcp_ofdm;
1599         else {
1600                 bad_plcp_ofdm -= data->last_bad_plcp_cnt_ofdm;
1601                 data->last_bad_plcp_cnt_ofdm += bad_plcp_ofdm;
1602         }
1603
1604         if (data->last_fa_cnt_ofdm > fa_ofdm)
1605                 data->last_fa_cnt_ofdm = fa_ofdm;
1606         else {
1607                 fa_ofdm -= data->last_fa_cnt_ofdm;
1608                 data->last_fa_cnt_ofdm += fa_ofdm;
1609         }
1610
1611         if (data->last_fa_cnt_cck > fa_cck)
1612                 data->last_fa_cnt_cck = fa_cck;
1613         else {
1614                 fa_cck -= data->last_fa_cnt_cck;
1615                 data->last_fa_cnt_cck += fa_cck;
1616         }
1617
1618         /* Total aborted signal locks */
1619         norm_fa_ofdm = fa_ofdm + bad_plcp_ofdm;
1620         norm_fa_cck = fa_cck + bad_plcp_cck;
1621
1622         IWL_DEBUG_CALIB("cck: fa %u badp %u  ofdm: fa %u badp %u\n", fa_cck,
1623                         bad_plcp_cck, fa_ofdm, bad_plcp_ofdm);
1624
1625         iwl4965_sens_auto_corr_ofdm(priv, norm_fa_ofdm, rx_enable_time);
1626         iwl4965_sens_energy_cck(priv, norm_fa_cck, rx_enable_time, &statis);
1627         rc |= iwl4965_sensitivity_write(priv, CMD_ASYNC);
1628
1629         return;
1630 }
1631
1632 static void iwl4965_bg_sensitivity_work(struct work_struct *work)
1633 {
1634         struct iwl4965_priv *priv = container_of(work, struct iwl4965_priv,
1635                         sensitivity_work);
1636
1637         mutex_lock(&priv->mutex);
1638
1639         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
1640             test_bit(STATUS_SCANNING, &priv->status)) {
1641                 mutex_unlock(&priv->mutex);
1642                 return;
1643         }
1644
1645         if (priv->start_calib) {
1646                 iwl4965_noise_calibration(priv, &priv->statistics);
1647
1648                 if (priv->sensitivity_data.state ==
1649                                         IWL_SENS_CALIB_NEED_REINIT) {
1650                         iwl4965_init_sensitivity(priv, CMD_ASYNC, 0);
1651                         priv->sensitivity_data.state = IWL_SENS_CALIB_ALLOWED;
1652                 } else
1653                         iwl4965_sensitivity_calibration(priv,
1654                                         &priv->statistics);
1655         }
1656
1657         mutex_unlock(&priv->mutex);
1658         return;
1659 }
1660 #endif /*CONFIG_IWL4965_SENSITIVITY*/
1661
1662 static void iwl4965_bg_txpower_work(struct work_struct *work)
1663 {
1664         struct iwl4965_priv *priv = container_of(work, struct iwl4965_priv,
1665                         txpower_work);
1666
1667         /* If a scan happened to start before we got here
1668          * then just return; the statistics notification will
1669          * kick off another scheduled work to compensate for
1670          * any temperature delta we missed here. */
1671         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
1672             test_bit(STATUS_SCANNING, &priv->status))
1673                 return;
1674
1675         mutex_lock(&priv->mutex);
1676
1677         /* Regardless of if we are assocaited, we must reconfigure the
1678          * TX power since frames can be sent on non-radar channels while
1679          * not associated */
1680         iwl4965_hw_reg_send_txpower(priv);
1681
1682         /* Update last_temperature to keep is_calib_needed from running
1683          * when it isn't needed... */
1684         priv->last_temperature = priv->temperature;
1685
1686         mutex_unlock(&priv->mutex);
1687 }
1688
1689 /*
1690  * Acquire priv->lock before calling this function !
1691  */
1692 static void iwl4965_set_wr_ptrs(struct iwl4965_priv *priv, int txq_id, u32 index)
1693 {
1694         iwl4965_write_direct32(priv, HBUS_TARG_WRPTR,
1695                              (index & 0xff) | (txq_id << 8));
1696         iwl4965_write_prph(priv, KDR_SCD_QUEUE_RDPTR(txq_id), index);
1697 }
1698
1699 /**
1700  * iwl4965_tx_queue_set_status - (optionally) start Tx/Cmd queue
1701  * @tx_fifo_id: Tx DMA/FIFO channel (range 0-7) that the queue will feed
1702  * @scd_retry: (1) Indicates queue will be used in aggregation mode
1703  *
1704  * NOTE:  Acquire priv->lock before calling this function !
1705  */
1706 static void iwl4965_tx_queue_set_status(struct iwl4965_priv *priv,
1707                                         struct iwl4965_tx_queue *txq,
1708                                         int tx_fifo_id, int scd_retry)
1709 {
1710         int txq_id = txq->q.id;
1711
1712         /* Find out whether to activate Tx queue */
1713         int active = test_bit(txq_id, &priv->txq_ctx_active_msk)?1:0;
1714
1715         /* Set up and activate */
1716         iwl4965_write_prph(priv, KDR_SCD_QUEUE_STATUS_BITS(txq_id),
1717                                  (active << SCD_QUEUE_STTS_REG_POS_ACTIVE) |
1718                                  (tx_fifo_id << SCD_QUEUE_STTS_REG_POS_TXF) |
1719                                  (scd_retry << SCD_QUEUE_STTS_REG_POS_WSL) |
1720                                  (scd_retry << SCD_QUEUE_STTS_REG_POS_SCD_ACK) |
1721                                  SCD_QUEUE_STTS_REG_MSK);
1722
1723         txq->sched_retry = scd_retry;
1724
1725         IWL_DEBUG_INFO("%s %s Queue %d on AC %d\n",
1726                        active ? "Activate" : "Deactivate",
1727                        scd_retry ? "BA" : "AC", txq_id, tx_fifo_id);
1728 }
1729
1730 static const u16 default_queue_to_tx_fifo[] = {
1731         IWL_TX_FIFO_AC3,
1732         IWL_TX_FIFO_AC2,
1733         IWL_TX_FIFO_AC1,
1734         IWL_TX_FIFO_AC0,
1735         IWL_CMD_FIFO_NUM,
1736         IWL_TX_FIFO_HCCA_1,
1737         IWL_TX_FIFO_HCCA_2
1738 };
1739
1740 static inline void iwl4965_txq_ctx_activate(struct iwl4965_priv *priv, int txq_id)
1741 {
1742         set_bit(txq_id, &priv->txq_ctx_active_msk);
1743 }
1744
1745 static inline void iwl4965_txq_ctx_deactivate(struct iwl4965_priv *priv, int txq_id)
1746 {
1747         clear_bit(txq_id, &priv->txq_ctx_active_msk);
1748 }
1749
1750 int iwl4965_alive_notify(struct iwl4965_priv *priv)
1751 {
1752         u32 a;
1753         int i = 0;
1754         unsigned long flags;
1755         int rc;
1756
1757         spin_lock_irqsave(&priv->lock, flags);
1758
1759 #ifdef CONFIG_IWL4965_SENSITIVITY
1760         memset(&(priv->sensitivity_data), 0,
1761                sizeof(struct iwl4965_sensitivity_data));
1762         memset(&(priv->chain_noise_data), 0,
1763                sizeof(struct iwl4965_chain_noise_data));
1764         for (i = 0; i < NUM_RX_CHAINS; i++)
1765                 priv->chain_noise_data.delta_gain_code[i] =
1766                                 CHAIN_NOISE_DELTA_GAIN_INIT_VAL;
1767 #endif /* CONFIG_IWL4965_SENSITIVITY*/
1768         rc = iwl4965_grab_nic_access(priv);
1769         if (rc) {
1770                 spin_unlock_irqrestore(&priv->lock, flags);
1771                 return rc;
1772         }
1773
1774         /* Clear 4965's internal Tx Scheduler data base */
1775         priv->scd_base_addr = iwl4965_read_prph(priv, KDR_SCD_SRAM_BASE_ADDR);
1776         a = priv->scd_base_addr + SCD_CONTEXT_DATA_OFFSET;
1777         for (; a < priv->scd_base_addr + SCD_TX_STTS_BITMAP_OFFSET; a += 4)
1778                 iwl4965_write_targ_mem(priv, a, 0);
1779         for (; a < priv->scd_base_addr + SCD_TRANSLATE_TBL_OFFSET; a += 4)
1780                 iwl4965_write_targ_mem(priv, a, 0);
1781         for (; a < sizeof(u16) * priv->hw_setting.max_txq_num; a += 4)
1782                 iwl4965_write_targ_mem(priv, a, 0);
1783
1784         /* Tel 4965 where to find Tx byte count tables */
1785         iwl4965_write_prph(priv, KDR_SCD_DRAM_BASE_ADDR,
1786                 (priv->hw_setting.shared_phys +
1787                  offsetof(struct iwl4965_shared, queues_byte_cnt_tbls)) >> 10);
1788
1789         /* Disable chain mode for all queues */
1790         iwl4965_write_prph(priv, KDR_SCD_QUEUECHAIN_SEL, 0);
1791
1792         /* Initialize each Tx queue (including the command queue) */
1793         for (i = 0; i < priv->hw_setting.max_txq_num; i++) {
1794
1795                 /* TFD circular buffer read/write indexes */
1796                 iwl4965_write_prph(priv, KDR_SCD_QUEUE_RDPTR(i), 0);
1797                 iwl4965_write_direct32(priv, HBUS_TARG_WRPTR, 0 | (i << 8));
1798
1799                 /* Max Tx Window size for Scheduler-ACK mode */
1800                 iwl4965_write_targ_mem(priv, priv->scd_base_addr +
1801                                         SCD_CONTEXT_QUEUE_OFFSET(i),
1802                                         (SCD_WIN_SIZE <<
1803                                         SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
1804                                         SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
1805
1806                 /* Frame limit */
1807                 iwl4965_write_targ_mem(priv, priv->scd_base_addr +
1808                                         SCD_CONTEXT_QUEUE_OFFSET(i) +
1809                                         sizeof(u32),
1810                                         (SCD_FRAME_LIMIT <<
1811                                         SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) &
1812                                         SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
1813
1814         }
1815         iwl4965_write_prph(priv, KDR_SCD_INTERRUPT_MASK,
1816                                  (1 << priv->hw_setting.max_txq_num) - 1);
1817
1818         /* Activate all Tx DMA/FIFO channels */
1819         iwl4965_write_prph(priv, KDR_SCD_TXFACT,
1820                                  SCD_TXFACT_REG_TXFIFO_MASK(0, 7));
1821
1822         iwl4965_set_wr_ptrs(priv, IWL_CMD_QUEUE_NUM, 0);
1823
1824         /* Map each Tx/cmd queue to its corresponding fifo */
1825         for (i = 0; i < ARRAY_SIZE(default_queue_to_tx_fifo); i++) {
1826                 int ac = default_queue_to_tx_fifo[i];
1827                 iwl4965_txq_ctx_activate(priv, i);
1828                 iwl4965_tx_queue_set_status(priv, &priv->txq[i], ac, 0);
1829         }
1830
1831         iwl4965_release_nic_access(priv);
1832         spin_unlock_irqrestore(&priv->lock, flags);
1833
1834         return 0;
1835 }
1836
1837 /**
1838  * iwl4965_hw_set_hw_setting
1839  *
1840  * Called when initializing driver
1841  */
1842 int iwl4965_hw_set_hw_setting(struct iwl4965_priv *priv)
1843 {
1844         /* Allocate area for Tx byte count tables and Rx queue status */
1845         priv->hw_setting.shared_virt =
1846             pci_alloc_consistent(priv->pci_dev,
1847                                  sizeof(struct iwl4965_shared),
1848                                  &priv->hw_setting.shared_phys);
1849
1850         if (!priv->hw_setting.shared_virt)
1851                 return -1;
1852
1853         memset(priv->hw_setting.shared_virt, 0, sizeof(struct iwl4965_shared));
1854
1855         priv->hw_setting.max_txq_num = iwl4965_param_queues_num;
1856         priv->hw_setting.tx_cmd_len = sizeof(struct iwl4965_tx_cmd);
1857         priv->hw_setting.max_rxq_size = RX_QUEUE_SIZE;
1858         priv->hw_setting.max_rxq_log = RX_QUEUE_SIZE_LOG;
1859         if (iwl4965_param_amsdu_size_8K)
1860                 priv->hw_setting.rx_buf_size = IWL_RX_BUF_SIZE_8K;
1861         else
1862                 priv->hw_setting.rx_buf_size = IWL_RX_BUF_SIZE_4K;
1863         priv->hw_setting.max_pkt_size = priv->hw_setting.rx_buf_size - 256;
1864         priv->hw_setting.max_stations = IWL4965_STATION_COUNT;
1865         priv->hw_setting.bcast_sta_id = IWL4965_BROADCAST_ID;
1866
1867         priv->hw_setting.tx_ant_num = 2;
1868
1869         return 0;
1870 }
1871
1872 /**
1873  * iwl4965_hw_txq_ctx_free - Free TXQ Context
1874  *
1875  * Destroy all TX DMA queues and structures
1876  */
1877 void iwl4965_hw_txq_ctx_free(struct iwl4965_priv *priv)
1878 {
1879         int txq_id;
1880
1881         /* Tx queues */
1882         for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++)
1883                 iwl4965_tx_queue_free(priv, &priv->txq[txq_id]);
1884
1885         /* Keep-warm buffer */
1886         iwl4965_kw_free(priv);
1887 }
1888
1889 /**
1890  * iwl4965_hw_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr]
1891  *
1892  * Does NOT advance any TFD circular buffer read/write indexes
1893  * Does NOT free the TFD itself (which is within circular buffer)
1894  */
1895 int iwl4965_hw_txq_free_tfd(struct iwl4965_priv *priv, struct iwl4965_tx_queue *txq)
1896 {
1897         struct iwl4965_tfd_frame *bd_tmp = (struct iwl4965_tfd_frame *)&txq->bd[0];
1898         struct iwl4965_tfd_frame *bd = &bd_tmp[txq->q.read_ptr];
1899         struct pci_dev *dev = priv->pci_dev;
1900         int i;
1901         int counter = 0;
1902         int index, is_odd;
1903
1904         /* Host command buffers stay mapped in memory, nothing to clean */
1905         if (txq->q.id == IWL_CMD_QUEUE_NUM)
1906                 return 0;
1907
1908         /* Sanity check on number of chunks */
1909         counter = IWL_GET_BITS(*bd, num_tbs);
1910         if (counter > MAX_NUM_OF_TBS) {
1911                 IWL_ERROR("Too many chunks: %i\n", counter);
1912                 /* @todo issue fatal error, it is quite serious situation */
1913                 return 0;
1914         }
1915
1916         /* Unmap chunks, if any.
1917          * TFD info for odd chunks is different format than for even chunks. */
1918         for (i = 0; i < counter; i++) {
1919                 index = i / 2;
1920                 is_odd = i & 0x1;
1921
1922                 if (is_odd)
1923                         pci_unmap_single(
1924                                 dev,
1925                                 IWL_GET_BITS(bd->pa[index], tb2_addr_lo16) |
1926                                 (IWL_GET_BITS(bd->pa[index],
1927                                               tb2_addr_hi20) << 16),
1928                                 IWL_GET_BITS(bd->pa[index], tb2_len),
1929                                 PCI_DMA_TODEVICE);
1930
1931                 else if (i > 0)
1932                         pci_unmap_single(dev,
1933                                          le32_to_cpu(bd->pa[index].tb1_addr),
1934                                          IWL_GET_BITS(bd->pa[index], tb1_len),
1935                                          PCI_DMA_TODEVICE);
1936
1937                 /* Free SKB, if any, for this chunk */
1938                 if (txq->txb[txq->q.read_ptr].skb[i]) {
1939                         struct sk_buff *skb = txq->txb[txq->q.read_ptr].skb[i];
1940
1941                         dev_kfree_skb(skb);
1942                         txq->txb[txq->q.read_ptr].skb[i] = NULL;
1943                 }
1944         }
1945         return 0;
1946 }
1947
1948 int iwl4965_hw_reg_set_txpower(struct iwl4965_priv *priv, s8 power)
1949 {
1950         IWL_ERROR("TODO: Implement iwl4965_hw_reg_set_txpower!\n");
1951         return -EINVAL;
1952 }
1953
1954 static s32 iwl4965_math_div_round(s32 num, s32 denom, s32 *res)
1955 {
1956         s32 sign = 1;
1957
1958         if (num < 0) {
1959                 sign = -sign;
1960                 num = -num;
1961         }
1962         if (denom < 0) {
1963                 sign = -sign;
1964                 denom = -denom;
1965         }
1966         *res = 1;
1967         *res = ((num * 2 + denom) / (denom * 2)) * sign;
1968
1969         return 1;
1970 }
1971
1972 /**
1973  * iwl4965_get_voltage_compensation - Power supply voltage comp for txpower
1974  *
1975  * Determines power supply voltage compensation for txpower calculations.
1976  * Returns number of 1/2-dB steps to subtract from gain table index,
1977  * to compensate for difference between power supply voltage during
1978  * factory measurements, vs. current power supply voltage.
1979  *
1980  * Voltage indication is higher for lower voltage.
1981  * Lower voltage requires more gain (lower gain table index).
1982  */
1983 static s32 iwl4965_get_voltage_compensation(s32 eeprom_voltage,
1984                                             s32 current_voltage)
1985 {
1986         s32 comp = 0;
1987
1988         if ((TX_POWER_IWL_ILLEGAL_VOLTAGE == eeprom_voltage) ||
1989             (TX_POWER_IWL_ILLEGAL_VOLTAGE == current_voltage))
1990                 return 0;
1991
1992         iwl4965_math_div_round(current_voltage - eeprom_voltage,
1993                                TX_POWER_IWL_VOLTAGE_CODES_PER_03V, &comp);
1994
1995         if (current_voltage > eeprom_voltage)
1996                 comp *= 2;
1997         if ((comp < -2) || (comp > 2))
1998                 comp = 0;
1999
2000         return comp;
2001 }
2002
2003 static const struct iwl4965_channel_info *
2004 iwl4965_get_channel_txpower_info(struct iwl4965_priv *priv,
2005                                  enum ieee80211_band band, u16 channel)
2006 {
2007         const struct iwl4965_channel_info *ch_info;
2008
2009         ch_info = iwl4965_get_channel_info(priv, band, channel);
2010
2011         if (!is_channel_valid(ch_info))
2012                 return NULL;
2013
2014         return ch_info;
2015 }
2016
2017 static s32 iwl4965_get_tx_atten_grp(u16 channel)
2018 {
2019         if (channel >= CALIB_IWL_TX_ATTEN_GR5_FCH &&
2020             channel <= CALIB_IWL_TX_ATTEN_GR5_LCH)
2021                 return CALIB_CH_GROUP_5;
2022
2023         if (channel >= CALIB_IWL_TX_ATTEN_GR1_FCH &&
2024             channel <= CALIB_IWL_TX_ATTEN_GR1_LCH)
2025                 return CALIB_CH_GROUP_1;
2026
2027         if (channel >= CALIB_IWL_TX_ATTEN_GR2_FCH &&
2028             channel <= CALIB_IWL_TX_ATTEN_GR2_LCH)
2029                 return CALIB_CH_GROUP_2;
2030
2031         if (channel >= CALIB_IWL_TX_ATTEN_GR3_FCH &&
2032             channel <= CALIB_IWL_TX_ATTEN_GR3_LCH)
2033                 return CALIB_CH_GROUP_3;
2034
2035         if (channel >= CALIB_IWL_TX_ATTEN_GR4_FCH &&
2036             channel <= CALIB_IWL_TX_ATTEN_GR4_LCH)
2037                 return CALIB_CH_GROUP_4;
2038
2039         IWL_ERROR("Can't find txatten group for channel %d.\n", channel);
2040         return -1;
2041 }
2042
2043 static u32 iwl4965_get_sub_band(const struct iwl4965_priv *priv, u32 channel)
2044 {
2045         s32 b = -1;
2046
2047         for (b = 0; b < EEPROM_TX_POWER_BANDS; b++) {
2048                 if (priv->eeprom.calib_info.band_info[b].ch_from == 0)
2049                         continue;
2050
2051                 if ((channel >= priv->eeprom.calib_info.band_info[b].ch_from)
2052                     && (channel <= priv->eeprom.calib_info.band_info[b].ch_to))
2053                         break;
2054         }
2055
2056         return b;
2057 }
2058
2059 static s32 iwl4965_interpolate_value(s32 x, s32 x1, s32 y1, s32 x2, s32 y2)
2060 {
2061         s32 val;
2062
2063         if (x2 == x1)
2064                 return y1;
2065         else {
2066                 iwl4965_math_div_round((x2 - x) * (y1 - y2), (x2 - x1), &val);
2067                 return val + y2;
2068         }
2069 }
2070
2071 /**
2072  * iwl4965_interpolate_chan - Interpolate factory measurements for one channel
2073  *
2074  * Interpolates factory measurements from the two sample channels within a
2075  * sub-band, to apply to channel of interest.  Interpolation is proportional to
2076  * differences in channel frequencies, which is proportional to differences
2077  * in channel number.
2078  */
2079 static int iwl4965_interpolate_chan(struct iwl4965_priv *priv, u32 channel,
2080                                     struct iwl4965_eeprom_calib_ch_info *chan_info)
2081 {
2082         s32 s = -1;
2083         u32 c;
2084         u32 m;
2085         const struct iwl4965_eeprom_calib_measure *m1;
2086         const struct iwl4965_eeprom_calib_measure *m2;
2087         struct iwl4965_eeprom_calib_measure *omeas;
2088         u32 ch_i1;
2089         u32 ch_i2;
2090
2091         s = iwl4965_get_sub_band(priv, channel);
2092         if (s >= EEPROM_TX_POWER_BANDS) {
2093                 IWL_ERROR("Tx Power can not find channel %d ", channel);
2094                 return -1;
2095         }
2096
2097         ch_i1 = priv->eeprom.calib_info.band_info[s].ch1.ch_num;
2098         ch_i2 = priv->eeprom.calib_info.band_info[s].ch2.ch_num;
2099         chan_info->ch_num = (u8) channel;
2100
2101         IWL_DEBUG_TXPOWER("channel %d subband %d factory cal ch %d & %d\n",
2102                           channel, s, ch_i1, ch_i2);
2103
2104         for (c = 0; c < EEPROM_TX_POWER_TX_CHAINS; c++) {
2105                 for (m = 0; m < EEPROM_TX_POWER_MEASUREMENTS; m++) {
2106                         m1 = &(priv->eeprom.calib_info.band_info[s].ch1.
2107                                measurements[c][m]);
2108                         m2 = &(priv->eeprom.calib_info.band_info[s].ch2.
2109                                measurements[c][m]);
2110                         omeas = &(chan_info->measurements[c][m]);
2111
2112                         omeas->actual_pow =
2113                             (u8) iwl4965_interpolate_value(channel, ch_i1,
2114                                                            m1->actual_pow,
2115                                                            ch_i2,
2116                                                            m2->actual_pow);
2117                         omeas->gain_idx =
2118                             (u8) iwl4965_interpolate_value(channel, ch_i1,
2119                                                            m1->gain_idx, ch_i2,
2120                                                            m2->gain_idx);
2121                         omeas->temperature =
2122                             (u8) iwl4965_interpolate_value(channel, ch_i1,
2123                                                            m1->temperature,
2124                                                            ch_i2,
2125                                                            m2->temperature);
2126                         omeas->pa_det =
2127                             (s8) iwl4965_interpolate_value(channel, ch_i1,
2128                                                            m1->pa_det, ch_i2,
2129                                                            m2->pa_det);
2130
2131                         IWL_DEBUG_TXPOWER
2132                             ("chain %d meas %d AP1=%d AP2=%d AP=%d\n", c, m,
2133                              m1->actual_pow, m2->actual_pow, omeas->actual_pow);
2134                         IWL_DEBUG_TXPOWER
2135                             ("chain %d meas %d NI1=%d NI2=%d NI=%d\n", c, m,
2136                              m1->gain_idx, m2->gain_idx, omeas->gain_idx);
2137                         IWL_DEBUG_TXPOWER
2138                             ("chain %d meas %d PA1=%d PA2=%d PA=%d\n", c, m,
2139                              m1->pa_det, m2->pa_det, omeas->pa_det);
2140                         IWL_DEBUG_TXPOWER
2141                             ("chain %d meas %d  T1=%d  T2=%d  T=%d\n", c, m,
2142                              m1->temperature, m2->temperature,
2143                              omeas->temperature);
2144                 }
2145         }
2146
2147         return 0;
2148 }
2149
2150 /* bit-rate-dependent table to prevent Tx distortion, in half-dB units,
2151  * for OFDM 6, 12, 18, 24, 36, 48, 54, 60 MBit, and CCK all rates. */
2152 static s32 back_off_table[] = {
2153         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 20 MHz */
2154         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 20 MHz */
2155         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 40 MHz */
2156         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 40 MHz */
2157         10                      /* CCK */
2158 };
2159
2160 /* Thermal compensation values for txpower for various frequency ranges ...
2161  *   ratios from 3:1 to 4.5:1 of degrees (Celsius) per half-dB gain adjust */
2162 static struct iwl4965_txpower_comp_entry {
2163         s32 degrees_per_05db_a;
2164         s32 degrees_per_05db_a_denom;
2165 } tx_power_cmp_tble[CALIB_CH_GROUP_MAX] = {
2166         {9, 2},                 /* group 0 5.2, ch  34-43 */
2167         {4, 1},                 /* group 1 5.2, ch  44-70 */
2168         {4, 1},                 /* group 2 5.2, ch  71-124 */
2169         {4, 1},                 /* group 3 5.2, ch 125-200 */
2170         {3, 1}                  /* group 4 2.4, ch   all */
2171 };
2172
2173 static s32 get_min_power_index(s32 rate_power_index, u32 band)
2174 {
2175         if (!band) {
2176                 if ((rate_power_index & 7) <= 4)
2177                         return MIN_TX_GAIN_INDEX_52GHZ_EXT;
2178         }
2179         return MIN_TX_GAIN_INDEX;
2180 }
2181
2182 struct gain_entry {
2183         u8 dsp;
2184         u8 radio;
2185 };
2186
2187 static const struct gain_entry gain_table[2][108] = {
2188         /* 5.2GHz power gain index table */
2189         {
2190          {123, 0x3F},           /* highest txpower */
2191          {117, 0x3F},
2192          {110, 0x3F},
2193          {104, 0x3F},
2194          {98, 0x3F},
2195          {110, 0x3E},
2196          {104, 0x3E},
2197          {98, 0x3E},
2198          {110, 0x3D},
2199          {104, 0x3D},
2200          {98, 0x3D},
2201          {110, 0x3C},
2202          {104, 0x3C},
2203          {98, 0x3C},
2204          {110, 0x3B},
2205          {104, 0x3B},
2206          {98, 0x3B},
2207          {110, 0x3A},
2208          {104, 0x3A},
2209          {98, 0x3A},
2210          {110, 0x39},
2211          {104, 0x39},
2212          {98, 0x39},
2213          {110, 0x38},
2214          {104, 0x38},
2215          {98, 0x38},
2216          {110, 0x37},
2217          {104, 0x37},
2218          {98, 0x37},
2219          {110, 0x36},
2220          {104, 0x36},
2221          {98, 0x36},
2222          {110, 0x35},
2223          {104, 0x35},
2224          {98, 0x35},
2225          {110, 0x34},
2226          {104, 0x34},
2227          {98, 0x34},
2228          {110, 0x33},
2229          {104, 0x33},
2230          {98, 0x33},
2231          {110, 0x32},
2232          {104, 0x32},
2233          {98, 0x32},
2234          {110, 0x31},
2235          {104, 0x31},
2236          {98, 0x31},
2237          {110, 0x30},
2238          {104, 0x30},
2239          {98, 0x30},
2240          {110, 0x25},
2241          {104, 0x25},
2242          {98, 0x25},
2243          {110, 0x24},
2244          {104, 0x24},
2245          {98, 0x24},
2246          {110, 0x23},
2247          {104, 0x23},
2248          {98, 0x23},
2249          {110, 0x22},
2250          {104, 0x18},
2251          {98, 0x18},
2252          {110, 0x17},
2253          {104, 0x17},
2254          {98, 0x17},
2255          {110, 0x16},
2256          {104, 0x16},
2257          {98, 0x16},
2258          {110, 0x15},
2259          {104, 0x15},
2260          {98, 0x15},
2261          {110, 0x14},
2262          {104, 0x14},
2263          {98, 0x14},
2264          {110, 0x13},
2265          {104, 0x13},
2266          {98, 0x13},
2267          {110, 0x12},
2268          {104, 0x08},
2269          {98, 0x08},
2270          {110, 0x07},
2271          {104, 0x07},
2272          {98, 0x07},
2273          {110, 0x06},
2274          {104, 0x06},
2275          {98, 0x06},
2276          {110, 0x05},
2277          {104, 0x05},
2278          {98, 0x05},
2279          {110, 0x04},
2280          {104, 0x04},
2281          {98, 0x04},
2282          {110, 0x03},
2283          {104, 0x03},
2284          {98, 0x03},
2285          {110, 0x02},
2286          {104, 0x02},
2287          {98, 0x02},
2288          {110, 0x01},
2289          {104, 0x01},
2290          {98, 0x01},
2291          {110, 0x00},
2292          {104, 0x00},
2293          {98, 0x00},
2294          {93, 0x00},
2295          {88, 0x00},
2296          {83, 0x00},
2297          {78, 0x00},
2298          },
2299         /* 2.4GHz power gain index table */
2300         {
2301          {110, 0x3f},           /* highest txpower */
2302          {104, 0x3f},
2303          {98, 0x3f},
2304          {110, 0x3e},
2305          {104, 0x3e},
2306          {98, 0x3e},
2307          {110, 0x3d},
2308          {104, 0x3d},
2309          {98, 0x3d},
2310          {110, 0x3c},
2311          {104, 0x3c},
2312          {98, 0x3c},
2313          {110, 0x3b},
2314          {104, 0x3b},
2315          {98, 0x3b},
2316          {110, 0x3a},
2317          {104, 0x3a},
2318          {98, 0x3a},
2319          {110, 0x39},
2320          {104, 0x39},
2321          {98, 0x39},
2322          {110, 0x38},
2323          {104, 0x38},
2324          {98, 0x38},
2325          {110, 0x37},
2326          {104, 0x37},
2327          {98, 0x37},
2328          {110, 0x36},
2329          {104, 0x36},
2330          {98, 0x36},
2331          {110, 0x35},
2332          {104, 0x35},
2333          {98, 0x35},
2334          {110, 0x34},
2335          {104, 0x34},
2336          {98, 0x34},
2337          {110, 0x33},
2338          {104, 0x33},
2339          {98, 0x33},
2340          {110, 0x32},
2341          {104, 0x32},
2342          {98, 0x32},
2343          {110, 0x31},
2344          {104, 0x31},
2345          {98, 0x31},
2346          {110, 0x30},
2347          {104, 0x30},
2348          {98, 0x30},
2349          {110, 0x6},
2350          {104, 0x6},
2351          {98, 0x6},
2352          {110, 0x5},
2353          {104, 0x5},
2354          {98, 0x5},
2355          {110, 0x4},
2356          {104, 0x4},
2357          {98, 0x4},
2358          {110, 0x3},
2359          {104, 0x3},
2360          {98, 0x3},
2361          {110, 0x2},
2362          {104, 0x2},
2363          {98, 0x2},
2364          {110, 0x1},
2365          {104, 0x1},
2366          {98, 0x1},
2367          {110, 0x0},
2368          {104, 0x0},
2369          {98, 0x0},
2370          {97, 0},
2371          {96, 0},
2372          {95, 0},
2373          {94, 0},
2374          {93, 0},
2375          {92, 0},
2376          {91, 0},
2377          {90, 0},
2378          {89, 0},
2379          {88, 0},
2380          {87, 0},
2381          {86, 0},
2382          {85, 0},
2383          {84, 0},
2384          {83, 0},
2385          {82, 0},
2386          {81, 0},
2387          {80, 0},
2388          {79, 0},
2389          {78, 0},
2390          {77, 0},
2391          {76, 0},
2392          {75, 0},
2393          {74, 0},
2394          {73, 0},
2395          {72, 0},
2396          {71, 0},
2397          {70, 0},
2398          {69, 0},
2399          {68, 0},
2400          {67, 0},
2401          {66, 0},
2402          {65, 0},
2403          {64, 0},
2404          {63, 0},
2405          {62, 0},
2406          {61, 0},
2407          {60, 0},
2408          {59, 0},
2409          }
2410 };
2411
2412 static int iwl4965_fill_txpower_tbl(struct iwl4965_priv *priv, u8 band, u16 channel,
2413                                     u8 is_fat, u8 ctrl_chan_high,
2414                                     struct iwl4965_tx_power_db *tx_power_tbl)
2415 {
2416         u8 saturation_power;
2417         s32 target_power;
2418         s32 user_target_power;
2419         s32 power_limit;
2420         s32 current_temp;
2421         s32 reg_limit;
2422         s32 current_regulatory;
2423         s32 txatten_grp = CALIB_CH_GROUP_MAX;
2424         int i;
2425         int c;
2426         const struct iwl4965_channel_info *ch_info = NULL;
2427         struct iwl4965_eeprom_calib_ch_info ch_eeprom_info;
2428         const struct iwl4965_eeprom_calib_measure *measurement;
2429         s16 voltage;
2430         s32 init_voltage;
2431         s32 voltage_compensation;
2432         s32 degrees_per_05db_num;
2433         s32 degrees_per_05db_denom;
2434         s32 factory_temp;
2435         s32 temperature_comp[2];
2436         s32 factory_gain_index[2];
2437         s32 factory_actual_pwr[2];
2438         s32 power_index;
2439
2440         /* Sanity check requested level (dBm) */
2441         if (priv->user_txpower_limit < IWL_TX_POWER_TARGET_POWER_MIN) {
2442                 IWL_WARNING("Requested user TXPOWER %d below limit.\n",
2443                             priv->user_txpower_limit);
2444                 return -EINVAL;
2445         }
2446         if (priv->user_txpower_limit > IWL_TX_POWER_TARGET_POWER_MAX) {
2447                 IWL_WARNING("Requested user TXPOWER %d above limit.\n",
2448                             priv->user_txpower_limit);
2449                 return -EINVAL;
2450         }
2451
2452         /* user_txpower_limit is in dBm, convert to half-dBm (half-dB units
2453          *   are used for indexing into txpower table) */
2454         user_target_power = 2 * priv->user_txpower_limit;
2455
2456         /* Get current (RXON) channel, band, width */
2457         ch_info =
2458                 iwl4965_get_channel_txpower_info(priv, priv->band, channel);
2459
2460         IWL_DEBUG_TXPOWER("chan %d band %d is_fat %d\n", channel, band,
2461                           is_fat);
2462
2463         if (!ch_info)
2464                 return -EINVAL;
2465
2466         /* get txatten group, used to select 1) thermal txpower adjustment
2467          *   and 2) mimo txpower balance between Tx chains. */
2468         txatten_grp = iwl4965_get_tx_atten_grp(channel);
2469         if (txatten_grp < 0)
2470                 return -EINVAL;
2471
2472         IWL_DEBUG_TXPOWER("channel %d belongs to txatten group %d\n",
2473                           channel, txatten_grp);
2474
2475         if (is_fat) {
2476                 if (ctrl_chan_high)
2477                         channel -= 2;
2478                 else
2479                         channel += 2;
2480         }
2481
2482         /* hardware txpower limits ...
2483          * saturation (clipping distortion) txpowers are in half-dBm */
2484         if (band)
2485                 saturation_power = priv->eeprom.calib_info.saturation_power24;
2486         else
2487                 saturation_power = priv->eeprom.calib_info.saturation_power52;
2488
2489         if (saturation_power < IWL_TX_POWER_SATURATION_MIN ||
2490             saturation_power > IWL_TX_POWER_SATURATION_MAX) {
2491                 if (band)
2492                         saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_24;
2493                 else
2494                         saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_52;
2495         }
2496
2497         /* regulatory txpower limits ... reg_limit values are in half-dBm,
2498          *   max_power_avg values are in dBm, convert * 2 */
2499         if (is_fat)
2500                 reg_limit = ch_info->fat_max_power_avg * 2;
2501         else
2502                 reg_limit = ch_info->max_power_avg * 2;
2503
2504         if ((reg_limit < IWL_TX_POWER_REGULATORY_MIN) ||
2505             (reg_limit > IWL_TX_POWER_REGULATORY_MAX)) {
2506                 if (band)
2507                         reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_24;
2508                 else
2509                         reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_52;
2510         }
2511
2512         /* Interpolate txpower calibration values for this channel,
2513          *   based on factory calibration tests on spaced channels. */
2514         iwl4965_interpolate_chan(priv, channel, &ch_eeprom_info);
2515
2516         /* calculate tx gain adjustment based on power supply voltage */
2517         voltage = priv->eeprom.calib_info.voltage;
2518         init_voltage = (s32)le32_to_cpu(priv->card_alive_init.voltage);
2519         voltage_compensation =
2520             iwl4965_get_voltage_compensation(voltage, init_voltage);
2521
2522         IWL_DEBUG_TXPOWER("curr volt %d eeprom volt %d volt comp %d\n",
2523                           init_voltage,
2524                           voltage, voltage_compensation);
2525
2526         /* get current temperature (Celsius) */
2527         current_temp = max(priv->temperature, IWL_TX_POWER_TEMPERATURE_MIN);
2528         current_temp = min(priv->temperature, IWL_TX_POWER_TEMPERATURE_MAX);
2529         current_temp = KELVIN_TO_CELSIUS(current_temp);
2530
2531         /* select thermal txpower adjustment params, based on channel group
2532          *   (same frequency group used for mimo txatten adjustment) */
2533         degrees_per_05db_num =
2534             tx_power_cmp_tble[txatten_grp].degrees_per_05db_a;
2535         degrees_per_05db_denom =
2536             tx_power_cmp_tble[txatten_grp].degrees_per_05db_a_denom;
2537
2538         /* get per-chain txpower values from factory measurements */
2539         for (c = 0; c < 2; c++) {
2540                 measurement = &ch_eeprom_info.measurements[c][1];
2541
2542                 /* txgain adjustment (in half-dB steps) based on difference
2543                  *   between factory and current temperature */
2544                 factory_temp = measurement->temperature;
2545                 iwl4965_math_div_round((current_temp - factory_temp) *
2546                                        degrees_per_05db_denom,
2547                                        degrees_per_05db_num,
2548                                        &temperature_comp[c]);
2549
2550                 factory_gain_index[c] = measurement->gain_idx;
2551                 factory_actual_pwr[c] = measurement->actual_pow;
2552
2553                 IWL_DEBUG_TXPOWER("chain = %d\n", c);
2554                 IWL_DEBUG_TXPOWER("fctry tmp %d, "
2555                                   "curr tmp %d, comp %d steps\n",
2556                                   factory_temp, current_temp,
2557                                   temperature_comp[c]);
2558
2559                 IWL_DEBUG_TXPOWER("fctry idx %d, fctry pwr %d\n",
2560                                   factory_gain_index[c],
2561                                   factory_actual_pwr[c]);
2562         }
2563
2564         /* for each of 33 bit-rates (including 1 for CCK) */
2565         for (i = 0; i < POWER_TABLE_NUM_ENTRIES; i++) {
2566                 u8 is_mimo_rate;
2567                 union iwl4965_tx_power_dual_stream tx_power;
2568
2569                 /* for mimo, reduce each chain's txpower by half
2570                  * (3dB, 6 steps), so total output power is regulatory
2571                  * compliant. */
2572                 if (i & 0x8) {
2573                         current_regulatory = reg_limit -
2574                             IWL_TX_POWER_MIMO_REGULATORY_COMPENSATION;
2575                         is_mimo_rate = 1;
2576                 } else {
2577                         current_regulatory = reg_limit;
2578                         is_mimo_rate = 0;
2579                 }
2580
2581                 /* find txpower limit, either hardware or regulatory */
2582                 power_limit = saturation_power - back_off_table[i];
2583                 if (power_limit > current_regulatory)
2584                         power_limit = current_regulatory;
2585
2586                 /* reduce user's txpower request if necessary
2587                  * for this rate on this channel */
2588                 target_power = user_target_power;
2589                 if (target_power > power_limit)
2590                         target_power = power_limit;
2591
2592                 IWL_DEBUG_TXPOWER("rate %d sat %d reg %d usr %d tgt %d\n",
2593                                   i, saturation_power - back_off_table[i],
2594                                   current_regulatory, user_target_power,
2595                                   target_power);
2596
2597                 /* for each of 2 Tx chains (radio transmitters) */
2598                 for (c = 0; c < 2; c++) {
2599                         s32 atten_value;
2600
2601                         if (is_mimo_rate)
2602                                 atten_value =
2603                                     (s32)le32_to_cpu(priv->card_alive_init.
2604                                     tx_atten[txatten_grp][c]);
2605                         else
2606                                 atten_value = 0;
2607
2608                         /* calculate index; higher index means lower txpower */
2609                         power_index = (u8) (factory_gain_index[c] -
2610                                             (target_power -
2611                                              factory_actual_pwr[c]) -
2612                                             temperature_comp[c] -
2613                                             voltage_compensation +
2614                                             atten_value);
2615
2616 /*                      IWL_DEBUG_TXPOWER("calculated txpower index %d\n",
2617                                                 power_index); */
2618
2619                         if (power_index < get_min_power_index(i, band))
2620                                 power_index = get_min_power_index(i, band);
2621
2622                         /* adjust 5 GHz index to support negative indexes */
2623                         if (!band)
2624                                 power_index += 9;
2625
2626                         /* CCK, rate 32, reduce txpower for CCK */
2627                         if (i == POWER_TABLE_CCK_ENTRY)
2628                                 power_index +=
2629                                     IWL_TX_POWER_CCK_COMPENSATION_C_STEP;
2630
2631                         /* stay within the table! */
2632                         if (power_index > 107) {
2633                                 IWL_WARNING("txpower index %d > 107\n",
2634                                             power_index);
2635                                 power_index = 107;
2636                         }
2637                         if (power_index < 0) {
2638                                 IWL_WARNING("txpower index %d < 0\n",
2639                                             power_index);
2640                                 power_index = 0;
2641                         }
2642
2643                         /* fill txpower command for this rate/chain */
2644                         tx_power.s.radio_tx_gain[c] =
2645                                 gain_table[band][power_index].radio;
2646                         tx_power.s.dsp_predis_atten[c] =
2647                                 gain_table[band][power_index].dsp;
2648
2649                         IWL_DEBUG_TXPOWER("chain %d mimo %d index %d "
2650                                           "gain 0x%02x dsp %d\n",
2651                                           c, atten_value, power_index,
2652                                         tx_power.s.radio_tx_gain[c],
2653                                         tx_power.s.dsp_predis_atten[c]);
2654                 }/* for each chain */
2655
2656                 tx_power_tbl->power_tbl[i].dw = cpu_to_le32(tx_power.dw);
2657
2658         }/* for each rate */
2659
2660         return 0;
2661 }
2662
2663 /**
2664  * iwl4965_hw_reg_send_txpower - Configure the TXPOWER level user limit
2665  *
2666  * Uses the active RXON for channel, band, and characteristics (fat, high)
2667  * The power limit is taken from priv->user_txpower_limit.
2668  */
2669 int iwl4965_hw_reg_send_txpower(struct iwl4965_priv *priv)
2670 {
2671         struct iwl4965_txpowertable_cmd cmd = { 0 };
2672         int rc = 0;
2673         u8 band = 0;
2674         u8 is_fat = 0;
2675         u8 ctrl_chan_high = 0;
2676
2677         if (test_bit(STATUS_SCANNING, &priv->status)) {
2678                 /* If this gets hit a lot, switch it to a BUG() and catch
2679                  * the stack trace to find out who is calling this during
2680                  * a scan. */
2681                 IWL_WARNING("TX Power requested while scanning!\n");
2682                 return -EAGAIN;
2683         }
2684
2685         band = priv->band == IEEE80211_BAND_2GHZ;
2686
2687         is_fat =  is_fat_channel(priv->active_rxon.flags);
2688
2689         if (is_fat &&
2690             (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
2691                 ctrl_chan_high = 1;
2692
2693         cmd.band = band;
2694         cmd.channel = priv->active_rxon.channel;
2695
2696         rc = iwl4965_fill_txpower_tbl(priv, band,
2697                                 le16_to_cpu(priv->active_rxon.channel),
2698                                 is_fat, ctrl_chan_high, &cmd.tx_power);
2699         if (rc)
2700                 return rc;
2701
2702         rc = iwl4965_send_cmd_pdu(priv, REPLY_TX_PWR_TABLE_CMD, sizeof(cmd), &cmd);
2703         return rc;
2704 }
2705
2706 int iwl4965_hw_channel_switch(struct iwl4965_priv *priv, u16 channel)
2707 {
2708         int rc;
2709         u8 band = 0;
2710         u8 is_fat = 0;
2711         u8 ctrl_chan_high = 0;
2712         struct iwl4965_channel_switch_cmd cmd = { 0 };
2713         const struct iwl4965_channel_info *ch_info;
2714
2715         band = priv->band == IEEE80211_BAND_2GHZ;
2716
2717         ch_info = iwl4965_get_channel_info(priv, priv->band, channel);
2718
2719         is_fat = is_fat_channel(priv->staging_rxon.flags);
2720
2721         if (is_fat &&
2722             (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
2723                 ctrl_chan_high = 1;
2724
2725         cmd.band = band;
2726         cmd.expect_beacon = 0;
2727         cmd.channel = cpu_to_le16(channel);
2728         cmd.rxon_flags = priv->active_rxon.flags;
2729         cmd.rxon_filter_flags = priv->active_rxon.filter_flags;
2730         cmd.switch_time = cpu_to_le32(priv->ucode_beacon_time);
2731         if (ch_info)
2732                 cmd.expect_beacon = is_channel_radar(ch_info);
2733         else
2734                 cmd.expect_beacon = 1;
2735
2736         rc = iwl4965_fill_txpower_tbl(priv, band, channel, is_fat,
2737                                       ctrl_chan_high, &cmd.tx_power);
2738         if (rc) {
2739                 IWL_DEBUG_11H("error:%d  fill txpower_tbl\n", rc);
2740                 return rc;
2741         }
2742
2743         rc = iwl4965_send_cmd_pdu(priv, REPLY_CHANNEL_SWITCH, sizeof(cmd), &cmd);
2744         return rc;
2745 }
2746
2747 #define RTS_HCCA_RETRY_LIMIT            3
2748 #define RTS_DFAULT_RETRY_LIMIT          60
2749
2750 void iwl4965_hw_build_tx_cmd_rate(struct iwl4965_priv *priv,
2751                               struct iwl4965_cmd *cmd,
2752                               struct ieee80211_tx_control *ctrl,
2753                               struct ieee80211_hdr *hdr, int sta_id,
2754                               int is_hcca)
2755 {
2756         struct iwl4965_tx_cmd *tx = &cmd->cmd.tx;
2757         u8 rts_retry_limit = 0;
2758         u8 data_retry_limit = 0;
2759         u16 fc = le16_to_cpu(hdr->frame_control);
2760         u8 rate_plcp;
2761         u16 rate_flags = 0;
2762         int rate_idx = min(ctrl->tx_rate->hw_value & 0xffff, IWL_RATE_COUNT - 1);
2763
2764         rate_plcp = iwl4965_rates[rate_idx].plcp;
2765
2766         rts_retry_limit = (is_hcca) ?
2767             RTS_HCCA_RETRY_LIMIT : RTS_DFAULT_RETRY_LIMIT;
2768
2769         if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
2770                 rate_flags |= RATE_MCS_CCK_MSK;
2771
2772
2773         if (ieee80211_is_probe_response(fc)) {
2774                 data_retry_limit = 3;
2775                 if (data_retry_limit < rts_retry_limit)
2776                         rts_retry_limit = data_retry_limit;
2777         } else
2778                 data_retry_limit = IWL_DEFAULT_TX_RETRY;
2779
2780         if (priv->data_retry_limit != -1)
2781                 data_retry_limit = priv->data_retry_limit;
2782
2783
2784         if (ieee80211_is_data(fc)) {
2785                 tx->initial_rate_index = 0;
2786                 tx->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
2787         } else {
2788                 switch (fc & IEEE80211_FCTL_STYPE) {
2789                 case IEEE80211_STYPE_AUTH:
2790                 case IEEE80211_STYPE_DEAUTH:
2791                 case IEEE80211_STYPE_ASSOC_REQ:
2792                 case IEEE80211_STYPE_REASSOC_REQ:
2793                         if (tx->tx_flags & TX_CMD_FLG_RTS_MSK) {
2794                                 tx->tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2795                                 tx->tx_flags |= TX_CMD_FLG_CTS_MSK;
2796                         }
2797                         break;
2798                 default:
2799                         break;
2800                 }
2801
2802                 /* Alternate between antenna A and B for successive frames */
2803                 if (priv->use_ant_b_for_management_frame) {
2804                         priv->use_ant_b_for_management_frame = 0;
2805                         rate_flags |= RATE_MCS_ANT_B_MSK;
2806                 } else {
2807                         priv->use_ant_b_for_management_frame = 1;
2808                         rate_flags |= RATE_MCS_ANT_A_MSK;
2809                 }
2810         }
2811
2812         tx->rts_retry_limit = rts_retry_limit;
2813         tx->data_retry_limit = data_retry_limit;
2814         tx->rate_n_flags = iwl4965_hw_set_rate_n_flags(rate_plcp, rate_flags);
2815 }
2816
2817 int iwl4965_hw_get_rx_read(struct iwl4965_priv *priv)
2818 {
2819         struct iwl4965_shared *shared_data = priv->hw_setting.shared_virt;
2820
2821         return IWL_GET_BITS(*shared_data, rb_closed_stts_rb_num);
2822 }
2823
2824 int iwl4965_hw_get_temperature(struct iwl4965_priv *priv)
2825 {
2826         return priv->temperature;
2827 }
2828
2829 unsigned int iwl4965_hw_get_beacon_cmd(struct iwl4965_priv *priv,
2830                           struct iwl4965_frame *frame, u8 rate)
2831 {
2832         struct iwl4965_tx_beacon_cmd *tx_beacon_cmd;
2833         unsigned int frame_size;
2834
2835         tx_beacon_cmd = &frame->u.beacon;
2836         memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
2837
2838         tx_beacon_cmd->tx.sta_id = IWL4965_BROADCAST_ID;
2839         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2840
2841         frame_size = iwl4965_fill_beacon_frame(priv,
2842                                 tx_beacon_cmd->frame,
2843                                 iwl4965_broadcast_addr,
2844                                 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
2845
2846         BUG_ON(frame_size > MAX_MPDU_SIZE);
2847         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
2848
2849         if ((rate == IWL_RATE_1M_PLCP) || (rate >= IWL_RATE_2M_PLCP))
2850                 tx_beacon_cmd->tx.rate_n_flags =
2851                         iwl4965_hw_set_rate_n_flags(rate, RATE_MCS_CCK_MSK);
2852         else
2853                 tx_beacon_cmd->tx.rate_n_flags =
2854                         iwl4965_hw_set_rate_n_flags(rate, 0);
2855
2856         tx_beacon_cmd->tx.tx_flags = (TX_CMD_FLG_SEQ_CTL_MSK |
2857                                 TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK);
2858         return (sizeof(*tx_beacon_cmd) + frame_size);
2859 }
2860
2861 /*
2862  * Tell 4965 where to find circular buffer of Tx Frame Descriptors for
2863  * given Tx queue, and enable the DMA channel used for that queue.
2864  *
2865  * 4965 supports up to 16 Tx queues in DRAM, mapped to up to 8 Tx DMA
2866  * channels supported in hardware.
2867  */
2868 int iwl4965_hw_tx_queue_init(struct iwl4965_priv *priv, struct iwl4965_tx_queue *txq)
2869 {
2870         int rc;
2871         unsigned long flags;
2872         int txq_id = txq->q.id;
2873
2874         spin_lock_irqsave(&priv->lock, flags);
2875         rc = iwl4965_grab_nic_access(priv);
2876         if (rc) {
2877                 spin_unlock_irqrestore(&priv->lock, flags);
2878                 return rc;
2879         }
2880
2881         /* Circular buffer (TFD queue in DRAM) physical base address */
2882         iwl4965_write_direct32(priv, FH_MEM_CBBC_QUEUE(txq_id),
2883                              txq->q.dma_addr >> 8);
2884
2885         /* Enable DMA channel, using same id as for TFD queue */
2886         iwl4965_write_direct32(
2887                 priv, IWL_FH_TCSR_CHNL_TX_CONFIG_REG(txq_id),
2888                 IWL_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE |
2889                 IWL_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE_VAL);
2890         iwl4965_release_nic_access(priv);
2891         spin_unlock_irqrestore(&priv->lock, flags);
2892
2893         return 0;
2894 }
2895
2896 int iwl4965_hw_txq_attach_buf_to_tfd(struct iwl4965_priv *priv, void *ptr,
2897                                  dma_addr_t addr, u16 len)
2898 {
2899         int index, is_odd;
2900         struct iwl4965_tfd_frame *tfd = ptr;
2901         u32 num_tbs = IWL_GET_BITS(*tfd, num_tbs);
2902
2903         /* Each TFD can point to a maximum 20 Tx buffers */
2904         if ((num_tbs >= MAX_NUM_OF_TBS) || (num_tbs < 0)) {
2905                 IWL_ERROR("Error can not send more than %d chunks\n",
2906                           MAX_NUM_OF_TBS);
2907                 return -EINVAL;
2908         }
2909
2910         index = num_tbs / 2;
2911         is_odd = num_tbs & 0x1;
2912
2913         if (!is_odd) {
2914                 tfd->pa[index].tb1_addr = cpu_to_le32(addr);
2915                 IWL_SET_BITS(tfd->pa[index], tb1_addr_hi,
2916                              iwl_get_dma_hi_address(addr));
2917                 IWL_SET_BITS(tfd->pa[index], tb1_len, len);
2918         } else {
2919                 IWL_SET_BITS(tfd->pa[index], tb2_addr_lo16,
2920                              (u32) (addr & 0xffff));
2921                 IWL_SET_BITS(tfd->pa[index], tb2_addr_hi20, addr >> 16);
2922                 IWL_SET_BITS(tfd->pa[index], tb2_len, len);
2923         }
2924
2925         IWL_SET_BITS(*tfd, num_tbs, num_tbs + 1);
2926
2927         return 0;
2928 }
2929
2930 static void iwl4965_hw_card_show_info(struct iwl4965_priv *priv)
2931 {
2932         u16 hw_version = priv->eeprom.board_revision_4965;
2933
2934         IWL_DEBUG_INFO("4965ABGN HW Version %u.%u.%u\n",
2935                        ((hw_version >> 8) & 0x0F),
2936                        ((hw_version >> 8) >> 4), (hw_version & 0x00FF));
2937
2938         IWL_DEBUG_INFO("4965ABGN PBA Number %.16s\n",
2939                        priv->eeprom.board_pba_number_4965);
2940 }
2941
2942 #define IWL_TX_CRC_SIZE         4
2943 #define IWL_TX_DELIMITER_SIZE   4
2944
2945 /**
2946  * iwl4965_tx_queue_update_wr_ptr - Set up entry in Tx byte-count array
2947  */
2948 int iwl4965_tx_queue_update_wr_ptr(struct iwl4965_priv *priv,
2949                                    struct iwl4965_tx_queue *txq, u16 byte_cnt)
2950 {
2951         int len;
2952         int txq_id = txq->q.id;
2953         struct iwl4965_shared *shared_data = priv->hw_setting.shared_virt;
2954
2955         if (txq->need_update == 0)
2956                 return 0;
2957
2958         len = byte_cnt + IWL_TX_CRC_SIZE + IWL_TX_DELIMITER_SIZE;
2959
2960         /* Set up byte count within first 256 entries */
2961         IWL_SET_BITS16(shared_data->queues_byte_cnt_tbls[txq_id].
2962                        tfd_offset[txq->q.write_ptr], byte_cnt, len);
2963
2964         /* If within first 64 entries, duplicate at end */
2965         if (txq->q.write_ptr < IWL4965_MAX_WIN_SIZE)
2966                 IWL_SET_BITS16(shared_data->queues_byte_cnt_tbls[txq_id].
2967                         tfd_offset[IWL4965_QUEUE_SIZE + txq->q.write_ptr],
2968                         byte_cnt, len);
2969
2970         return 0;
2971 }
2972
2973 /**
2974  * iwl4965_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
2975  *
2976  * Selects how many and which Rx receivers/antennas/chains to use.
2977  * This should not be used for scan command ... it puts data in wrong place.
2978  */
2979 void iwl4965_set_rxon_chain(struct iwl4965_priv *priv)
2980 {
2981         u8 is_single = is_single_stream(priv);
2982         u8 idle_state, rx_state;
2983
2984         priv->staging_rxon.rx_chain = 0;
2985         rx_state = idle_state = 3;
2986
2987         /* Tell uCode which antennas are actually connected.
2988          * Before first association, we assume all antennas are connected.
2989          * Just after first association, iwl4965_noise_calibration()
2990          *    checks which antennas actually *are* connected. */
2991         priv->staging_rxon.rx_chain |=
2992             cpu_to_le16(priv->valid_antenna << RXON_RX_CHAIN_VALID_POS);
2993
2994         /* How many receivers should we use? */
2995         iwl4965_get_rx_chain_counter(priv, &idle_state, &rx_state);
2996         priv->staging_rxon.rx_chain |=
2997                 cpu_to_le16(rx_state << RXON_RX_CHAIN_MIMO_CNT_POS);
2998         priv->staging_rxon.rx_chain |=
2999                 cpu_to_le16(idle_state << RXON_RX_CHAIN_CNT_POS);
3000
3001         if (!is_single && (rx_state >= 2) &&
3002             !test_bit(STATUS_POWER_PMI, &priv->status))
3003                 priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
3004         else
3005                 priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
3006
3007         IWL_DEBUG_ASSOC("rx chain %X\n", priv->staging_rxon.rx_chain);
3008 }
3009
3010 /**
3011  * sign_extend - Sign extend a value using specified bit as sign-bit
3012  *
3013  * Example: sign_extend(9, 3) would return -7 as bit3 of 1001b is 1
3014  * and bit0..2 is 001b which when sign extended to 1111111111111001b is -7.
3015  *
3016  * @param oper value to sign extend
3017  * @param index 0 based bit index (0<=index<32) to sign bit
3018  */
3019 static s32 sign_extend(u32 oper, int index)
3020 {
3021         u8 shift = 31 - index;
3022
3023         return (s32)(oper << shift) >> shift;
3024 }
3025
3026 /**
3027  * iwl4965_get_temperature - return the calibrated temperature (in Kelvin)
3028  * @statistics: Provides the temperature reading from the uCode
3029  *
3030  * A return of <0 indicates bogus data in the statistics
3031  */
3032 int iwl4965_get_temperature(const struct iwl4965_priv *priv)
3033 {
3034         s32 temperature;
3035         s32 vt;
3036         s32 R1, R2, R3;
3037         u32 R4;
3038
3039         if (test_bit(STATUS_TEMPERATURE, &priv->status) &&
3040                 (priv->statistics.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK)) {
3041                 IWL_DEBUG_TEMP("Running FAT temperature calibration\n");
3042                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[1]);
3043                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[1]);
3044                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[1]);
3045                 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[1]);
3046         } else {
3047                 IWL_DEBUG_TEMP("Running temperature calibration\n");
3048                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[0]);
3049                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[0]);
3050                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[0]);
3051                 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[0]);
3052         }
3053
3054         /*
3055          * Temperature is only 23 bits, so sign extend out to 32.
3056          *
3057          * NOTE If we haven't received a statistics notification yet
3058          * with an updated temperature, use R4 provided to us in the
3059          * "initialize" ALIVE response.
3060          */
3061         if (!test_bit(STATUS_TEMPERATURE, &priv->status))
3062                 vt = sign_extend(R4, 23);
3063         else
3064                 vt = sign_extend(
3065                         le32_to_cpu(priv->statistics.general.temperature), 23);
3066
3067         IWL_DEBUG_TEMP("Calib values R[1-3]: %d %d %d R4: %d\n",
3068                        R1, R2, R3, vt);
3069
3070         if (R3 == R1) {
3071                 IWL_ERROR("Calibration conflict R1 == R3\n");
3072                 return -1;
3073         }
3074
3075         /* Calculate temperature in degrees Kelvin, adjust by 97%.
3076          * Add offset to center the adjustment around 0 degrees Centigrade. */
3077         temperature = TEMPERATURE_CALIB_A_VAL * (vt - R2);
3078         temperature /= (R3 - R1);
3079         temperature = (temperature * 97) / 100 +
3080             TEMPERATURE_CALIB_KELVIN_OFFSET;
3081
3082         IWL_DEBUG_TEMP("Calibrated temperature: %dK, %dC\n", temperature,
3083             KELVIN_TO_CELSIUS(temperature));
3084
3085         return temperature;
3086 }
3087
3088 /* Adjust Txpower only if temperature variance is greater than threshold. */
3089 #define IWL_TEMPERATURE_THRESHOLD   3
3090
3091 /**
3092  * iwl4965_is_temp_calib_needed - determines if new calibration is needed
3093  *
3094  * If the temperature changed has changed sufficiently, then a recalibration
3095  * is needed.
3096  *
3097  * Assumes caller will replace priv->last_temperature once calibration
3098  * executed.
3099  */
3100 static int iwl4965_is_temp_calib_needed(struct iwl4965_priv *priv)
3101 {
3102         int temp_diff;
3103
3104         if (!test_bit(STATUS_STATISTICS, &priv->status)) {
3105                 IWL_DEBUG_TEMP("Temperature not updated -- no statistics.\n");
3106                 return 0;
3107         }
3108
3109         temp_diff = priv->temperature - priv->last_temperature;
3110
3111         /* get absolute value */
3112         if (temp_diff < 0) {
3113                 IWL_DEBUG_POWER("Getting cooler, delta %d, \n", temp_diff);
3114                 temp_diff = -temp_diff;
3115         } else if (temp_diff == 0)
3116                 IWL_DEBUG_POWER("Same temp, \n");
3117         else
3118                 IWL_DEBUG_POWER("Getting warmer, delta %d, \n", temp_diff);
3119
3120         if (temp_diff < IWL_TEMPERATURE_THRESHOLD) {
3121                 IWL_DEBUG_POWER("Thermal txpower calib not needed\n");
3122                 return 0;
3123         }
3124
3125         IWL_DEBUG_POWER("Thermal txpower calib needed\n");
3126
3127         return 1;
3128 }
3129
3130 /* Calculate noise level, based on measurements during network silence just
3131  *   before arriving beacon.  This measurement can be done only if we know
3132  *   exactly when to expect beacons, therefore only when we're associated. */
3133 static void iwl4965_rx_calc_noise(struct iwl4965_priv *priv)
3134 {
3135         struct statistics_rx_non_phy *rx_info
3136                                 = &(priv->statistics.rx.general);
3137         int num_active_rx = 0;
3138         int total_silence = 0;
3139         int bcn_silence_a =
3140                 le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER;
3141         int bcn_silence_b =
3142                 le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER;
3143         int bcn_silence_c =
3144                 le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER;
3145
3146         if (bcn_silence_a) {
3147                 total_silence += bcn_silence_a;
3148                 num_active_rx++;
3149         }
3150         if (bcn_silence_b) {
3151                 total_silence += bcn_silence_b;
3152                 num_active_rx++;
3153         }
3154         if (bcn_silence_c) {
3155                 total_silence += bcn_silence_c;
3156                 num_active_rx++;
3157         }
3158
3159         /* Average among active antennas */
3160         if (num_active_rx)
3161                 priv->last_rx_noise = (total_silence / num_active_rx) - 107;
3162         else
3163                 priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
3164
3165         IWL_DEBUG_CALIB("inband silence a %u, b %u, c %u, dBm %d\n",
3166                         bcn_silence_a, bcn_silence_b, bcn_silence_c,
3167                         priv->last_rx_noise);
3168 }
3169
3170 void iwl4965_hw_rx_statistics(struct iwl4965_priv *priv, struct iwl4965_rx_mem_buffer *rxb)
3171 {
3172         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3173         int change;
3174         s32 temp;
3175
3176         IWL_DEBUG_RX("Statistics notification received (%d vs %d).\n",
3177                      (int)sizeof(priv->statistics), pkt->len);
3178
3179         change = ((priv->statistics.general.temperature !=
3180                    pkt->u.stats.general.temperature) ||
3181                   ((priv->statistics.flag &
3182                     STATISTICS_REPLY_FLG_FAT_MODE_MSK) !=
3183                    (pkt->u.stats.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK)));
3184
3185         memcpy(&priv->statistics, &pkt->u.stats, sizeof(priv->statistics));
3186
3187         set_bit(STATUS_STATISTICS, &priv->status);
3188
3189         /* Reschedule the statistics timer to occur in
3190          * REG_RECALIB_PERIOD seconds to ensure we get a
3191          * thermal update even if the uCode doesn't give
3192          * us one */
3193         mod_timer(&priv->statistics_periodic, jiffies +
3194                   msecs_to_jiffies(REG_RECALIB_PERIOD * 1000));
3195
3196         if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
3197             (pkt->hdr.cmd == STATISTICS_NOTIFICATION)) {
3198                 iwl4965_rx_calc_noise(priv);
3199 #ifdef CONFIG_IWL4965_SENSITIVITY
3200                 queue_work(priv->workqueue, &priv->sensitivity_work);
3201 #endif
3202         }
3203
3204         /* If the hardware hasn't reported a change in
3205          * temperature then don't bother computing a
3206          * calibrated temperature value */
3207         if (!change)
3208                 return;
3209
3210         temp = iwl4965_get_temperature(priv);
3211         if (temp < 0)
3212                 return;
3213
3214         if (priv->temperature != temp) {
3215                 if (priv->temperature)
3216                         IWL_DEBUG_TEMP("Temperature changed "
3217                                        "from %dC to %dC\n",
3218                                        KELVIN_TO_CELSIUS(priv->temperature),
3219                                        KELVIN_TO_CELSIUS(temp));
3220                 else
3221                         IWL_DEBUG_TEMP("Temperature "
3222                                        "initialized to %dC\n",
3223                                        KELVIN_TO_CELSIUS(temp));
3224         }
3225
3226         priv->temperature = temp;
3227         set_bit(STATUS_TEMPERATURE, &priv->status);
3228
3229         if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
3230                      iwl4965_is_temp_calib_needed(priv))
3231                 queue_work(priv->workqueue, &priv->txpower_work);
3232 }
3233
3234 static void iwl4965_add_radiotap(struct iwl4965_priv *priv,
3235                                  struct sk_buff *skb,
3236                                  struct iwl4965_rx_phy_res *rx_start,
3237                                  struct ieee80211_rx_status *stats,
3238                                  u32 ampdu_status)
3239 {
3240         s8 signal = stats->ssi;
3241         s8 noise = 0;
3242         int rate = stats->rate_idx;
3243         u64 tsf = stats->mactime;
3244         __le16 phy_flags_hw = rx_start->phy_flags;
3245         struct iwl4965_rt_rx_hdr {
3246                 struct ieee80211_radiotap_header rt_hdr;
3247                 __le64 rt_tsf;          /* TSF */
3248                 u8 rt_flags;            /* radiotap packet flags */
3249                 u8 rt_rate;             /* rate in 500kb/s */
3250                 __le16 rt_channelMHz;   /* channel in MHz */
3251                 __le16 rt_chbitmask;    /* channel bitfield */
3252                 s8 rt_dbmsignal;        /* signal in dBm, kluged to signed */
3253                 s8 rt_dbmnoise;
3254                 u8 rt_antenna;          /* antenna number */
3255         } __attribute__ ((packed)) *iwl4965_rt;
3256
3257         /* TODO: We won't have enough headroom for HT frames. Fix it later. */
3258         if (skb_headroom(skb) < sizeof(*iwl4965_rt)) {
3259                 if (net_ratelimit())
3260                         printk(KERN_ERR "not enough headroom [%d] for "
3261                                "radiotap head [%zd]\n",
3262                                skb_headroom(skb), sizeof(*iwl4965_rt));
3263                 return;
3264         }
3265
3266         /* put radiotap header in front of 802.11 header and data */
3267         iwl4965_rt = (void *)skb_push(skb, sizeof(*iwl4965_rt));
3268
3269         /* initialise radiotap header */
3270         iwl4965_rt->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
3271         iwl4965_rt->rt_hdr.it_pad = 0;
3272
3273         /* total header + data */
3274         put_unaligned(cpu_to_le16(sizeof(*iwl4965_rt)),
3275                       &iwl4965_rt->rt_hdr.it_len);
3276
3277         /* Indicate all the fields we add to the radiotap header */
3278         put_unaligned(cpu_to_le32((1 << IEEE80211_RADIOTAP_TSFT) |
3279                                   (1 << IEEE80211_RADIOTAP_FLAGS) |
3280                                   (1 << IEEE80211_RADIOTAP_RATE) |
3281                                   (1 << IEEE80211_RADIOTAP_CHANNEL) |
3282                                   (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL) |
3283                                   (1 << IEEE80211_RADIOTAP_DBM_ANTNOISE) |
3284                                   (1 << IEEE80211_RADIOTAP_ANTENNA)),
3285                       &iwl4965_rt->rt_hdr.it_present);
3286
3287         /* Zero the flags, we'll add to them as we go */
3288         iwl4965_rt->rt_flags = 0;
3289
3290         put_unaligned(cpu_to_le64(tsf), &iwl4965_rt->rt_tsf);
3291
3292         iwl4965_rt->rt_dbmsignal = signal;
3293         iwl4965_rt->rt_dbmnoise = noise;
3294
3295         /* Convert the channel frequency and set the flags */
3296         put_unaligned(cpu_to_le16(stats->freq), &iwl4965_rt->rt_channelMHz);
3297         if (!(phy_flags_hw & RX_RES_PHY_FLAGS_BAND_24_MSK))
3298                 put_unaligned(cpu_to_le16(IEEE80211_CHAN_OFDM |
3299                                           IEEE80211_CHAN_5GHZ),
3300                               &iwl4965_rt->rt_chbitmask);
3301         else if (phy_flags_hw & RX_RES_PHY_FLAGS_MOD_CCK_MSK)
3302                 put_unaligned(cpu_to_le16(IEEE80211_CHAN_CCK |
3303                                           IEEE80211_CHAN_2GHZ),
3304                               &iwl4965_rt->rt_chbitmask);
3305         else    /* 802.11g */
3306                 put_unaligned(cpu_to_le16(IEEE80211_CHAN_OFDM |
3307                                           IEEE80211_CHAN_2GHZ),
3308                               &iwl4965_rt->rt_chbitmask);
3309
3310         if (rate == -1)
3311                 iwl4965_rt->rt_rate = 0;
3312         else
3313                 iwl4965_rt->rt_rate = iwl4965_rates[rate].ieee;
3314
3315         /*
3316          * "antenna number"
3317          *
3318          * It seems that the antenna field in the phy flags value
3319          * is actually a bitfield. This is undefined by radiotap,
3320          * it wants an actual antenna number but I always get "7"
3321          * for most legacy frames I receive indicating that the
3322          * same frame was received on all three RX chains.
3323          *
3324          * I think this field should be removed in favour of a
3325          * new 802.11n radiotap field "RX chains" that is defined
3326          * as a bitmask.
3327          */
3328         iwl4965_rt->rt_antenna =
3329                 le16_to_cpu(phy_flags_hw & RX_RES_PHY_FLAGS_ANTENNA_MSK) >> 4;
3330
3331         /* set the preamble flag if appropriate */
3332         if (phy_flags_hw & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
3333                 iwl4965_rt->rt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;
3334
3335         stats->flag |= RX_FLAG_RADIOTAP;
3336 }
3337
3338 static void iwl4965_handle_data_packet(struct iwl4965_priv *priv, int is_data,
3339                                        int include_phy,
3340                                        struct iwl4965_rx_mem_buffer *rxb,
3341                                        struct ieee80211_rx_status *stats)
3342 {
3343         struct iwl4965_rx_packet *pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
3344         struct iwl4965_rx_phy_res *rx_start = (include_phy) ?
3345             (struct iwl4965_rx_phy_res *)&(pkt->u.raw[0]) : NULL;
3346         struct ieee80211_hdr *hdr;
3347         u16 len;
3348         __le32 *rx_end;
3349         unsigned int skblen;
3350         u32 ampdu_status;
3351
3352         if (!include_phy && priv->last_phy_res[0])
3353                 rx_start = (struct iwl4965_rx_phy_res *)&priv->last_phy_res[1];
3354
3355         if (!rx_start) {
3356                 IWL_ERROR("MPDU frame without a PHY data\n");
3357                 return;
3358         }
3359         if (include_phy) {
3360                 hdr = (struct ieee80211_hdr *)((u8 *) & rx_start[1] +
3361                                                rx_start->cfg_phy_cnt);
3362
3363                 len = le16_to_cpu(rx_start->byte_count);
3364
3365                 rx_end = (__le32 *) ((u8 *) & pkt->u.raw[0] +
3366                                   sizeof(struct iwl4965_rx_phy_res) +
3367                                   rx_start->cfg_phy_cnt + len);
3368
3369         } else {
3370                 struct iwl4965_rx_mpdu_res_start *amsdu =
3371                     (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw;
3372
3373                 hdr = (struct ieee80211_hdr *)(pkt->u.raw +
3374                                sizeof(struct iwl4965_rx_mpdu_res_start));
3375                 len =  le16_to_cpu(amsdu->byte_count);
3376                 rx_start->byte_count = amsdu->byte_count;
3377                 rx_end = (__le32 *) (((u8 *) hdr) + len);
3378         }
3379         if (len > priv->hw_setting.max_pkt_size || len < 16) {
3380                 IWL_WARNING("byte count out of range [16,4K] : %d\n", len);
3381                 return;
3382         }
3383
3384         ampdu_status = le32_to_cpu(*rx_end);
3385         skblen = ((u8 *) rx_end - (u8 *) & pkt->u.raw[0]) + sizeof(u32);
3386
3387         /* start from MAC */
3388         skb_reserve(rxb->skb, (void *)hdr - (void *)pkt);
3389         skb_put(rxb->skb, len); /* end where data ends */
3390
3391         /* We only process data packets if the interface is open */
3392         if (unlikely(!priv->is_open)) {
3393                 IWL_DEBUG_DROP_LIMIT
3394                     ("Dropping packet while interface is not open.\n");
3395                 return;
3396         }
3397
3398         stats->flag = 0;
3399         hdr = (struct ieee80211_hdr *)rxb->skb->data;
3400
3401         if (iwl4965_param_hwcrypto)
3402                 iwl4965_set_decrypted_flag(priv, rxb->skb, ampdu_status, stats);
3403
3404         if (priv->add_radiotap)
3405                 iwl4965_add_radiotap(priv, rxb->skb, rx_start, stats, ampdu_status);
3406
3407         ieee80211_rx_irqsafe(priv->hw, rxb->skb, stats);
3408         priv->alloc_rxb_skb--;
3409         rxb->skb = NULL;
3410 #ifdef LED
3411         priv->led_packets += len;
3412         iwl4965_setup_activity_timer(priv);
3413 #endif
3414 }
3415
3416 /* Calc max signal level (dBm) among 3 possible receivers */
3417 static int iwl4965_calc_rssi(struct iwl4965_rx_phy_res *rx_resp)
3418 {
3419         /* data from PHY/DSP regarding signal strength, etc.,
3420          *   contents are always there, not configurable by host.  */
3421         struct iwl4965_rx_non_cfg_phy *ncphy =
3422             (struct iwl4965_rx_non_cfg_phy *)rx_resp->non_cfg_phy;
3423         u32 agc = (le16_to_cpu(ncphy->agc_info) & IWL_AGC_DB_MASK)
3424                         >> IWL_AGC_DB_POS;
3425
3426         u32 valid_antennae =
3427             (le16_to_cpu(rx_resp->phy_flags) & RX_PHY_FLAGS_ANTENNAE_MASK)
3428                         >> RX_PHY_FLAGS_ANTENNAE_OFFSET;
3429         u8 max_rssi = 0;
3430         u32 i;
3431
3432         /* Find max rssi among 3 possible receivers.
3433          * These values are measured by the digital signal processor (DSP).
3434          * They should stay fairly constant even as the signal strength varies,
3435          *   if the radio's automatic gain control (AGC) is working right.
3436          * AGC value (see below) will provide the "interesting" info. */
3437         for (i = 0; i < 3; i++)
3438                 if (valid_antennae & (1 << i))
3439                         max_rssi = max(ncphy->rssi_info[i << 1], max_rssi);
3440
3441         IWL_DEBUG_STATS("Rssi In A %d B %d C %d Max %d AGC dB %d\n",
3442                 ncphy->rssi_info[0], ncphy->rssi_info[2], ncphy->rssi_info[4],
3443                 max_rssi, agc);
3444
3445         /* dBm = max_rssi dB - agc dB - constant.
3446          * Higher AGC (higher radio gain) means lower signal. */
3447         return (max_rssi - agc - IWL_RSSI_OFFSET);
3448 }
3449
3450 #ifdef CONFIG_IWL4965_HT
3451
3452 /* Parsed Information Elements */
3453 struct ieee802_11_elems {
3454         u8 *ds_params;
3455         u8 ds_params_len;
3456         u8 *tim;
3457         u8 tim_len;
3458         u8 *ibss_params;
3459         u8 ibss_params_len;
3460         u8 *erp_info;
3461         u8 erp_info_len;
3462         u8 *ht_cap_param;
3463         u8 ht_cap_param_len;
3464         u8 *ht_extra_param;
3465         u8 ht_extra_param_len;
3466 };
3467
3468 static int parse_elems(u8 *start, size_t len, struct ieee802_11_elems *elems)
3469 {
3470         size_t left = len;
3471         u8 *pos = start;
3472         int unknown = 0;
3473
3474         memset(elems, 0, sizeof(*elems));
3475
3476         while (left >= 2) {
3477                 u8 id, elen;
3478
3479                 id = *pos++;
3480                 elen = *pos++;
3481                 left -= 2;
3482
3483                 if (elen > left)
3484                         return -1;
3485
3486                 switch (id) {
3487                 case WLAN_EID_DS_PARAMS:
3488                         elems->ds_params = pos;
3489                         elems->ds_params_len = elen;
3490                         break;
3491                 case WLAN_EID_TIM:
3492                         elems->tim = pos;
3493                         elems->tim_len = elen;
3494                         break;
3495                 case WLAN_EID_IBSS_PARAMS:
3496                         elems->ibss_params = pos;
3497                         elems->ibss_params_len = elen;
3498                         break;
3499                 case WLAN_EID_ERP_INFO:
3500                         elems->erp_info = pos;
3501                         elems->erp_info_len = elen;
3502                         break;
3503                 case WLAN_EID_HT_CAPABILITY:
3504                         elems->ht_cap_param = pos;
3505                         elems->ht_cap_param_len = elen;
3506                         break;
3507                 case WLAN_EID_HT_EXTRA_INFO:
3508                         elems->ht_extra_param = pos;
3509                         elems->ht_extra_param_len = elen;
3510                         break;
3511                 default:
3512                         unknown++;
3513                         break;
3514                 }
3515
3516                 left -= elen;
3517                 pos += elen;
3518         }
3519
3520         return 0;
3521 }
3522
3523 void iwl4965_init_ht_hw_capab(struct ieee80211_ht_info *ht_info,
3524                               enum ieee80211_band band)
3525 {
3526         ht_info->cap = 0;
3527         memset(ht_info->supp_mcs_set, 0, 16);
3528
3529         ht_info->ht_supported = 1;
3530
3531         if (band == IEEE80211_BAND_5GHZ) {
3532                 ht_info->cap |= (u16)IEEE80211_HT_CAP_SUP_WIDTH;
3533                 ht_info->cap |= (u16)IEEE80211_HT_CAP_SGI_40;
3534                 ht_info->supp_mcs_set[4] = 0x01;
3535         }
3536         ht_info->cap |= (u16)IEEE80211_HT_CAP_GRN_FLD;
3537         ht_info->cap |= (u16)IEEE80211_HT_CAP_SGI_20;
3538         ht_info->cap |= (u16)(IEEE80211_HT_CAP_MIMO_PS &
3539                              (IWL_MIMO_PS_NONE << 2));
3540         if (iwl4965_param_amsdu_size_8K) {
3541                 printk(KERN_DEBUG "iwl4965 in A-MSDU 8K support mode\n");
3542                 ht_info->cap |= (u16)IEEE80211_HT_CAP_MAX_AMSDU;
3543         }
3544
3545         ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
3546         ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
3547
3548         ht_info->supp_mcs_set[0] = 0xFF;
3549         ht_info->supp_mcs_set[1] = 0xFF;
3550 }
3551 #endif /* CONFIG_IWL4965_HT */
3552
3553 static void iwl4965_sta_modify_ps_wake(struct iwl4965_priv *priv, int sta_id)
3554 {
3555         unsigned long flags;
3556
3557         spin_lock_irqsave(&priv->sta_lock, flags);
3558         priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
3559         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
3560         priv->stations[sta_id].sta.sta.modify_mask = 0;
3561         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3562         spin_unlock_irqrestore(&priv->sta_lock, flags);
3563
3564         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
3565 }
3566
3567 static void iwl4965_update_ps_mode(struct iwl4965_priv *priv, u16 ps_bit, u8 *addr)
3568 {
3569         /* FIXME: need locking over ps_status ??? */
3570         u8 sta_id = iwl4965_hw_find_station(priv, addr);
3571
3572         if (sta_id != IWL_INVALID_STATION) {
3573                 u8 sta_awake = priv->stations[sta_id].
3574                                 ps_status == STA_PS_STATUS_WAKE;
3575
3576                 if (sta_awake && ps_bit)
3577                         priv->stations[sta_id].ps_status = STA_PS_STATUS_SLEEP;
3578                 else if (!sta_awake && !ps_bit) {
3579                         iwl4965_sta_modify_ps_wake(priv, sta_id);
3580                         priv->stations[sta_id].ps_status = STA_PS_STATUS_WAKE;
3581                 }
3582         }
3583 }
3584 #ifdef CONFIG_IWL4965_DEBUG
3585
3586 /**
3587  * iwl4965_dbg_report_frame - dump frame to syslog during debug sessions
3588  *
3589  * You may hack this function to show different aspects of received frames,
3590  * including selective frame dumps.
3591  * group100 parameter selects whether to show 1 out of 100 good frames.
3592  *
3593  * TODO:  This was originally written for 3945, need to audit for
3594  *        proper operation with 4965.
3595  */
3596 static void iwl4965_dbg_report_frame(struct iwl4965_priv *priv,
3597                       struct iwl4965_rx_packet *pkt,
3598                       struct ieee80211_hdr *header, int group100)
3599 {
3600         u32 to_us;
3601         u32 print_summary = 0;
3602         u32 print_dump = 0;     /* set to 1 to dump all frames' contents */
3603         u32 hundred = 0;
3604         u32 dataframe = 0;
3605         u16 fc;
3606         u16 seq_ctl;
3607         u16 channel;
3608         u16 phy_flags;
3609         int rate_sym;
3610         u16 length;
3611         u16 status;
3612         u16 bcn_tmr;
3613         u32 tsf_low;
3614         u64 tsf;
3615         u8 rssi;
3616         u8 agc;
3617         u16 sig_avg;
3618         u16 noise_diff;
3619         struct iwl4965_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
3620         struct iwl4965_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
3621         struct iwl4965_rx_frame_end *rx_end = IWL_RX_END(pkt);
3622         u8 *data = IWL_RX_DATA(pkt);
3623
3624         if (likely(!(iwl4965_debug_level & IWL_DL_RX)))
3625                 return;
3626
3627         /* MAC header */
3628         fc = le16_to_cpu(header->frame_control);
3629         seq_ctl = le16_to_cpu(header->seq_ctrl);
3630
3631         /* metadata */
3632         channel = le16_to_cpu(rx_hdr->channel);
3633         phy_flags = le16_to_cpu(rx_hdr->phy_flags);
3634         rate_sym = rx_hdr->rate;
3635         length = le16_to_cpu(rx_hdr->len);
3636
3637         /* end-of-frame status and timestamp */
3638         status = le32_to_cpu(rx_end->status);
3639         bcn_tmr = le32_to_cpu(rx_end->beacon_timestamp);
3640         tsf_low = le64_to_cpu(rx_end->timestamp) & 0x0ffffffff;
3641         tsf = le64_to_cpu(rx_end->timestamp);
3642
3643         /* signal statistics */
3644         rssi = rx_stats->rssi;
3645         agc = rx_stats->agc;
3646         sig_avg = le16_to_cpu(rx_stats->sig_avg);
3647         noise_diff = le16_to_cpu(rx_stats->noise_diff);
3648
3649         to_us = !compare_ether_addr(header->addr1, priv->mac_addr);
3650
3651         /* if data frame is to us and all is good,
3652          *   (optionally) print summary for only 1 out of every 100 */
3653         if (to_us && (fc & ~IEEE80211_FCTL_PROTECTED) ==
3654             (IEEE80211_FCTL_FROMDS | IEEE80211_FTYPE_DATA)) {
3655                 dataframe = 1;
3656                 if (!group100)
3657                         print_summary = 1;      /* print each frame */
3658                 else if (priv->framecnt_to_us < 100) {
3659                         priv->framecnt_to_us++;
3660                         print_summary = 0;
3661                 } else {
3662                         priv->framecnt_to_us = 0;
3663                         print_summary = 1;
3664                         hundred = 1;
3665                 }
3666         } else {
3667                 /* print summary for all other frames */
3668                 print_summary = 1;
3669         }
3670
3671         if (print_summary) {
3672                 char *title;
3673                 int rate_idx;
3674                 u32 bitrate;
3675
3676                 if (hundred)
3677                         title = "100Frames";
3678                 else if (fc & IEEE80211_FCTL_RETRY)
3679                         title = "Retry";
3680                 else if (ieee80211_is_assoc_response(fc))
3681                         title = "AscRsp";
3682                 else if (ieee80211_is_reassoc_response(fc))
3683                         title = "RasRsp";
3684                 else if (ieee80211_is_probe_response(fc)) {
3685                         title = "PrbRsp";
3686                         print_dump = 1; /* dump frame contents */
3687                 } else if (ieee80211_is_beacon(fc)) {
3688                         title = "Beacon";
3689                         print_dump = 1; /* dump frame contents */
3690                 } else if (ieee80211_is_atim(fc))
3691                         title = "ATIM";
3692                 else if (ieee80211_is_auth(fc))
3693                         title = "Auth";
3694                 else if (ieee80211_is_deauth(fc))
3695                         title = "DeAuth";
3696                 else if (ieee80211_is_disassoc(fc))
3697                         title = "DisAssoc";
3698                 else
3699                         title = "Frame";
3700
3701                 rate_idx = iwl4965_hwrate_to_plcp_idx(rate_sym);
3702                 if (unlikely(rate_idx == -1))
3703                         bitrate = 0;
3704                 else
3705                         bitrate = iwl4965_rates[rate_idx].ieee / 2;
3706
3707                 /* print frame summary.
3708                  * MAC addresses show just the last byte (for brevity),
3709                  *    but you can hack it to show more, if you'd like to. */
3710                 if (dataframe)
3711                         IWL_DEBUG_RX("%s: mhd=0x%04x, dst=0x%02x, "
3712                                      "len=%u, rssi=%d, chnl=%d, rate=%u, \n",
3713                                      title, fc, header->addr1[5],
3714                                      length, rssi, channel, bitrate);
3715                 else {
3716                         /* src/dst addresses assume managed mode */
3717                         IWL_DEBUG_RX("%s: 0x%04x, dst=0x%02x, "
3718                                      "src=0x%02x, rssi=%u, tim=%lu usec, "
3719                                      "phy=0x%02x, chnl=%d\n",
3720                                      title, fc, header->addr1[5],
3721                                      header->addr3[5], rssi,
3722                                      tsf_low - priv->scan_start_tsf,
3723                                      phy_flags, channel);
3724                 }
3725         }
3726         if (print_dump)
3727                 iwl4965_print_hex_dump(IWL_DL_RX, data, length);
3728 }
3729 #else
3730 static inline void iwl4965_dbg_report_frame(struct iwl4965_priv *priv,
3731                                             struct iwl4965_rx_packet *pkt,
3732                                             struct ieee80211_hdr *header,
3733                                             int group100)
3734 {
3735 }
3736 #endif
3737
3738
3739 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
3740
3741 /* Called for REPLY_4965_RX (legacy ABG frames), or
3742  * REPLY_RX_MPDU_CMD (HT high-throughput N frames). */
3743 static void iwl4965_rx_reply_rx(struct iwl4965_priv *priv,
3744                                 struct iwl4965_rx_mem_buffer *rxb)
3745 {
3746         struct ieee80211_hdr *header;
3747         struct ieee80211_rx_status rx_status;
3748         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3749         /* Use phy data (Rx signal strength, etc.) contained within
3750          *   this rx packet for legacy frames,
3751          *   or phy data cached from REPLY_RX_PHY_CMD for HT frames. */
3752         int include_phy = (pkt->hdr.cmd == REPLY_4965_RX);
3753         struct iwl4965_rx_phy_res *rx_start = (include_phy) ?
3754                 (struct iwl4965_rx_phy_res *)&(pkt->u.raw[0]) :
3755                 (struct iwl4965_rx_phy_res *)&priv->last_phy_res[1];
3756         __le32 *rx_end;
3757         unsigned int len = 0;
3758         u16 fc;
3759         u8 network_packet;
3760
3761         rx_status.mactime = le64_to_cpu(rx_start->timestamp);
3762         rx_status.freq = ieee80211chan2mhz(le16_to_cpu(rx_start->channel));
3763         rx_status.band = (rx_start->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ?
3764                                 IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
3765         rx_status.rate_idx = iwl4965_hwrate_to_plcp_idx(
3766                                         le32_to_cpu(rx_start->rate_n_flags));
3767
3768         if (rx_status.band == IEEE80211_BAND_5GHZ)
3769                 rx_status.rate_idx -= IWL_FIRST_OFDM_RATE;
3770
3771         rx_status.antenna = 0;
3772         rx_status.flag = 0;
3773
3774         if ((unlikely(rx_start->cfg_phy_cnt > 20))) {
3775                 IWL_DEBUG_DROP
3776                         ("dsp size out of range [0,20]: "
3777                          "%d/n", rx_start->cfg_phy_cnt);
3778                 return;
3779         }
3780
3781         if (!include_phy) {
3782                 if (priv->last_phy_res[0])
3783                         rx_start = (struct iwl4965_rx_phy_res *)
3784                                 &priv->last_phy_res[1];
3785                 else
3786                         rx_start = NULL;
3787         }
3788
3789         if (!rx_start) {
3790                 IWL_ERROR("MPDU frame without a PHY data\n");
3791                 return;
3792         }
3793
3794         if (include_phy) {
3795                 header = (struct ieee80211_hdr *)((u8 *) & rx_start[1]
3796                                                   + rx_start->cfg_phy_cnt);
3797
3798                 len = le16_to_cpu(rx_start->byte_count);
3799                 rx_end = (__le32 *)(pkt->u.raw + rx_start->cfg_phy_cnt +
3800                                   sizeof(struct iwl4965_rx_phy_res) + len);
3801         } else {
3802                 struct iwl4965_rx_mpdu_res_start *amsdu =
3803                         (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw;
3804
3805                 header = (void *)(pkt->u.raw +
3806                         sizeof(struct iwl4965_rx_mpdu_res_start));
3807                 len = le16_to_cpu(amsdu->byte_count);
3808                 rx_end = (__le32 *) (pkt->u.raw +
3809                         sizeof(struct iwl4965_rx_mpdu_res_start) + len);
3810         }
3811
3812         if (!(*rx_end & RX_RES_STATUS_NO_CRC32_ERROR) ||
3813             !(*rx_end & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
3814                 IWL_DEBUG_RX("Bad CRC or FIFO: 0x%08X.\n",
3815                                 le32_to_cpu(*rx_end));
3816                 return;
3817         }
3818
3819         priv->ucode_beacon_time = le32_to_cpu(rx_start->beacon_time_stamp);
3820
3821         /* Find max signal strength (dBm) among 3 antenna/receiver chains */
3822         rx_status.ssi = iwl4965_calc_rssi(rx_start);
3823
3824         /* Meaningful noise values are available only from beacon statistics,
3825          *   which are gathered only when associated, and indicate noise
3826          *   only for the associated network channel ...
3827          * Ignore these noise values while scanning (other channels) */
3828         if (iwl4965_is_associated(priv) &&
3829             !test_bit(STATUS_SCANNING, &priv->status)) {
3830                 rx_status.noise = priv->last_rx_noise;
3831                 rx_status.signal = iwl4965_calc_sig_qual(rx_status.ssi,
3832                                                          rx_status.noise);
3833         } else {
3834                 rx_status.noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
3835                 rx_status.signal = iwl4965_calc_sig_qual(rx_status.ssi, 0);
3836         }
3837
3838         /* Reset beacon noise level if not associated. */
3839         if (!iwl4965_is_associated(priv))
3840                 priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
3841
3842         /* Set "1" to report good data frames in groups of 100 */
3843         /* FIXME: need to optimze the call: */
3844         iwl4965_dbg_report_frame(priv, pkt, header, 1);
3845
3846         IWL_DEBUG_STATS_LIMIT("Rssi %d, noise %d, qual %d, TSF %llu\n",
3847                               rx_status.ssi, rx_status.noise, rx_status.signal,
3848                               rx_status.mactime);
3849
3850         network_packet = iwl4965_is_network_packet(priv, header);
3851         if (network_packet) {
3852                 priv->last_rx_rssi = rx_status.ssi;
3853                 priv->last_beacon_time =  priv->ucode_beacon_time;
3854                 priv->last_tsf = le64_to_cpu(rx_start->timestamp);
3855         }
3856
3857         fc = le16_to_cpu(header->frame_control);
3858         switch (fc & IEEE80211_FCTL_FTYPE) {
3859         case IEEE80211_FTYPE_MGMT:
3860
3861                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
3862                         iwl4965_update_ps_mode(priv, fc  & IEEE80211_FCTL_PM,
3863                                                 header->addr2);
3864                 switch (fc & IEEE80211_FCTL_STYPE) {
3865                 case IEEE80211_STYPE_PROBE_RESP:
3866                 case IEEE80211_STYPE_BEACON:
3867                         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA &&
3868                              !compare_ether_addr(header->addr2, priv->bssid)) ||
3869                             (priv->iw_mode == IEEE80211_IF_TYPE_IBSS &&
3870                              !compare_ether_addr(header->addr3, priv->bssid))) {
3871                                 struct ieee80211_mgmt *mgmt =
3872                                         (struct ieee80211_mgmt *)header;
3873                                 u64 timestamp =
3874                                         le64_to_cpu(mgmt->u.beacon.timestamp);
3875
3876                                 priv->timestamp0 = timestamp & 0xFFFFFFFF;
3877                                 priv->timestamp1 =
3878                                         (timestamp >> 32) & 0xFFFFFFFF;
3879                                 priv->beacon_int = le16_to_cpu(
3880                                     mgmt->u.beacon.beacon_int);
3881                                 if (priv->call_post_assoc_from_beacon &&
3882                                     (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
3883                                         priv->call_post_assoc_from_beacon = 0;
3884                                         queue_work(priv->workqueue,
3885                                             &priv->post_associate.work);
3886                                 }
3887                         }
3888                         break;
3889
3890                 case IEEE80211_STYPE_ACTION:
3891                         break;
3892
3893                         /*
3894                          * TODO: Use the new callback function from
3895                          * mac80211 instead of sniffing these packets.
3896                          */
3897                 case IEEE80211_STYPE_ASSOC_RESP:
3898                 case IEEE80211_STYPE_REASSOC_RESP:
3899                         if (network_packet) {
3900 #ifdef CONFIG_IWL4965_HT
3901                                 u8 *pos = NULL;
3902                                 struct ieee802_11_elems elems;
3903 #endif                          /*CONFIG_IWL4965_HT */
3904                                 struct ieee80211_mgmt *mgnt =
3905                                         (struct ieee80211_mgmt *)header;
3906
3907                                 /* We have just associated, give some
3908                                  * time for the 4-way handshake if
3909                                  * any. Don't start scan too early. */
3910                                 priv->next_scan_jiffies = jiffies +
3911                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
3912
3913                                 priv->assoc_id = (~((1 << 15) | (1 << 14))
3914                                         & le16_to_cpu(mgnt->u.assoc_resp.aid));
3915                                 priv->assoc_capability =
3916                                         le16_to_cpu(
3917                                                 mgnt->u.assoc_resp.capab_info);
3918 #ifdef CONFIG_IWL4965_HT
3919                                 pos = mgnt->u.assoc_resp.variable;
3920                                 if (!parse_elems(pos,
3921                                                  len - (pos - (u8 *) mgnt),
3922                                                  &elems)) {
3923                                         if (elems.ht_extra_param &&
3924                                             elems.ht_cap_param)
3925                                                 break;
3926                                 }
3927 #endif                          /*CONFIG_IWL4965_HT */
3928                                 /* assoc_id is 0 no association */
3929                                 if (!priv->assoc_id)
3930                                         break;
3931                                 if (priv->beacon_int)
3932                                         queue_work(priv->workqueue,
3933                                             &priv->post_associate.work);
3934                                 else
3935                                         priv->call_post_assoc_from_beacon = 1;
3936                         }
3937
3938                         break;
3939
3940                 case IEEE80211_STYPE_PROBE_REQ:
3941                         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
3942                             !iwl4965_is_associated(priv)) {
3943                                 DECLARE_MAC_BUF(mac1);
3944                                 DECLARE_MAC_BUF(mac2);
3945                                 DECLARE_MAC_BUF(mac3);
3946
3947                                 IWL_DEBUG_DROP("Dropping (non network): "
3948                                                "%s, %s, %s\n",
3949                                                print_mac(mac1, header->addr1),
3950                                                print_mac(mac2, header->addr2),
3951                                                print_mac(mac3, header->addr3));
3952                                 return;
3953                         }
3954                 }
3955                 iwl4965_handle_data_packet(priv, 0, include_phy, rxb, &rx_status);
3956                 break;
3957
3958         case IEEE80211_FTYPE_CTL:
3959 #ifdef CONFIG_IWL4965_HT
3960                 switch (fc & IEEE80211_FCTL_STYPE) {
3961                 case IEEE80211_STYPE_BACK_REQ:
3962                         IWL_DEBUG_HT("IEEE80211_STYPE_BACK_REQ arrived\n");
3963                         iwl4965_handle_data_packet(priv, 0, include_phy,
3964                                                 rxb, &rx_status);
3965                         break;
3966                 default:
3967                         break;
3968                 }
3969 #endif
3970                 break;
3971
3972         case IEEE80211_FTYPE_DATA: {
3973                 DECLARE_MAC_BUF(mac1);
3974                 DECLARE_MAC_BUF(mac2);
3975                 DECLARE_MAC_BUF(mac3);
3976
3977                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
3978                         iwl4965_update_ps_mode(priv, fc  & IEEE80211_FCTL_PM,
3979                                                 header->addr2);
3980
3981                 if (unlikely(!network_packet))
3982                         IWL_DEBUG_DROP("Dropping (non network): "
3983                                        "%s, %s, %s\n",
3984                                        print_mac(mac1, header->addr1),
3985                                        print_mac(mac2, header->addr2),
3986                                        print_mac(mac3, header->addr3));
3987                 else if (unlikely(iwl4965_is_duplicate_packet(priv, header)))
3988                         IWL_DEBUG_DROP("Dropping (dup): %s, %s, %s\n",
3989                                        print_mac(mac1, header->addr1),
3990                                        print_mac(mac2, header->addr2),
3991                                        print_mac(mac3, header->addr3));
3992                 else
3993                         iwl4965_handle_data_packet(priv, 1, include_phy, rxb,
3994                                                    &rx_status);
3995                 break;
3996         }
3997         default:
3998                 break;
3999
4000         }
4001 }
4002
4003 /* Cache phy data (Rx signal strength, etc) for HT frame (REPLY_RX_PHY_CMD).
4004  * This will be used later in iwl4965_rx_reply_rx() for REPLY_RX_MPDU_CMD. */
4005 static void iwl4965_rx_reply_rx_phy(struct iwl4965_priv *priv,
4006                                     struct iwl4965_rx_mem_buffer *rxb)
4007 {
4008         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
4009         priv->last_phy_res[0] = 1;
4010         memcpy(&priv->last_phy_res[1], &(pkt->u.raw[0]),
4011                sizeof(struct iwl4965_rx_phy_res));
4012 }
4013
4014 static void iwl4965_rx_missed_beacon_notif(struct iwl4965_priv *priv,
4015                                            struct iwl4965_rx_mem_buffer *rxb)
4016
4017 {
4018 #ifdef CONFIG_IWL4965_SENSITIVITY
4019         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
4020         struct iwl4965_missed_beacon_notif *missed_beacon;
4021
4022         missed_beacon = &pkt->u.missed_beacon;
4023         if (le32_to_cpu(missed_beacon->consequtive_missed_beacons) > 5) {
4024                 IWL_DEBUG_CALIB("missed bcn cnsq %d totl %d rcd %d expctd %d\n",
4025                     le32_to_cpu(missed_beacon->consequtive_missed_beacons),
4026                     le32_to_cpu(missed_beacon->total_missed_becons),
4027                     le32_to_cpu(missed_beacon->num_recvd_beacons),
4028                     le32_to_cpu(missed_beacon->num_expected_beacons));
4029                 priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
4030                 if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)))
4031                         queue_work(priv->workqueue, &priv->sensitivity_work);
4032         }
4033 #endif /*CONFIG_IWL4965_SENSITIVITY*/
4034 }
4035
4036 #ifdef CONFIG_IWL4965_HT
4037
4038 /**
4039  * iwl4965_sta_modify_enable_tid_tx - Enable Tx for this TID in station table
4040  */
4041 static void iwl4965_sta_modify_enable_tid_tx(struct iwl4965_priv *priv,
4042                                          int sta_id, int tid)
4043 {
4044         unsigned long flags;
4045
4046         /* Remove "disable" flag, to enable Tx for this TID */
4047         spin_lock_irqsave(&priv->sta_lock, flags);
4048         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
4049         priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
4050         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
4051         spin_unlock_irqrestore(&priv->sta_lock, flags);
4052
4053         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
4054 }
4055
4056 /**
4057  * iwl4965_tx_status_reply_compressed_ba - Update tx status from block-ack
4058  *
4059  * Go through block-ack's bitmap of ACK'd frames, update driver's record of
4060  * ACK vs. not.  This gets sent to mac80211, then to rate scaling algo.
4061  */
4062 static int iwl4965_tx_status_reply_compressed_ba(struct iwl4965_priv *priv,
4063                                                  struct iwl4965_ht_agg *agg,
4064                                                  struct iwl4965_compressed_ba_resp*
4065                                                  ba_resp)
4066
4067 {
4068         int i, sh, ack;
4069         u16 seq_ctl = le16_to_cpu(ba_resp->seq_ctl);
4070         u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
4071         u64 bitmap;
4072         int successes = 0;
4073         struct ieee80211_tx_status *tx_status;
4074
4075         if (unlikely(!agg->wait_for_ba))  {
4076                 IWL_ERROR("Received BA when not expected\n");
4077                 return -EINVAL;
4078         }
4079
4080         /* Mark that the expected block-ack response arrived */
4081         agg->wait_for_ba = 0;
4082         IWL_DEBUG_TX_REPLY("BA %d %d\n", agg->start_idx, ba_resp->seq_ctl);
4083
4084         /* Calculate shift to align block-ack bits with our Tx window bits */
4085         sh = agg->start_idx - SEQ_TO_INDEX(seq_ctl>>4);
4086         if (sh < 0) /* tbw something is wrong with indices */
4087                 sh += 0x100;
4088
4089         /* don't use 64-bit values for now */
4090         bitmap = le64_to_cpu(ba_resp->bitmap) >> sh;
4091
4092         if (agg->frame_count > (64 - sh)) {
4093                 IWL_DEBUG_TX_REPLY("more frames than bitmap size");
4094                 return -1;
4095         }
4096
4097         /* check for success or failure according to the
4098          * transmitted bitmap and block-ack bitmap */
4099         bitmap &= agg->bitmap;
4100
4101         /* For each frame attempted in aggregation,
4102          * update driver's record of tx frame's status. */
4103         for (i = 0; i < agg->frame_count ; i++) {
4104                 ack = bitmap & (1 << i);
4105                 successes += !!ack;
4106                 IWL_DEBUG_TX_REPLY("%s ON i=%d idx=%d raw=%d\n",
4107                         ack? "ACK":"NACK", i, (agg->start_idx + i) & 0xff,
4108                         agg->start_idx + i);
4109         }
4110
4111         tx_status = &priv->txq[scd_flow].txb[agg->start_idx].status;
4112         tx_status->flags = IEEE80211_TX_STATUS_ACK;
4113         tx_status->flags |= IEEE80211_TX_STATUS_AMPDU;
4114         tx_status->ampdu_ack_map = successes;
4115         tx_status->ampdu_ack_len = agg->frame_count;
4116         iwl4965_hwrate_to_tx_control(priv, agg->rate_n_flags,
4117                                      &tx_status->control);
4118
4119         IWL_DEBUG_TX_REPLY("Bitmap %llx\n", bitmap);
4120
4121         return 0;
4122 }
4123
4124 /**
4125  * iwl4965_tx_queue_stop_scheduler - Stop queue, but keep configuration
4126  */
4127 static void iwl4965_tx_queue_stop_scheduler(struct iwl4965_priv *priv,
4128                                             u16 txq_id)
4129 {
4130         /* Simply stop the queue, but don't change any configuration;
4131          * the SCD_ACT_EN bit is the write-enable mask for the ACTIVE bit. */
4132         iwl4965_write_prph(priv,
4133                 KDR_SCD_QUEUE_STATUS_BITS(txq_id),
4134                 (0 << SCD_QUEUE_STTS_REG_POS_ACTIVE)|
4135                 (1 << SCD_QUEUE_STTS_REG_POS_SCD_ACT_EN));
4136 }
4137
4138 /**
4139  * txq_id must be greater than IWL_BACK_QUEUE_FIRST_ID
4140  */
4141 static int iwl4965_tx_queue_agg_disable(struct iwl4965_priv *priv, u16 txq_id,
4142                                         u16 ssn_idx, u8 tx_fifo)
4143 {
4144         if (IWL_BACK_QUEUE_FIRST_ID > txq_id) {
4145                 IWL_WARNING("queue number too small: %d, must be > %d\n",
4146                                 txq_id, IWL_BACK_QUEUE_FIRST_ID);
4147                 return -EINVAL;
4148         }
4149
4150         iwl4965_tx_queue_stop_scheduler(priv, txq_id);
4151
4152         iwl4965_clear_bits_prph(priv, KDR_SCD_QUEUECHAIN_SEL, (1 << txq_id));
4153
4154         priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
4155         priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
4156         /* supposes that ssn_idx is valid (!= 0xFFF) */
4157         iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
4158
4159         iwl4965_clear_bits_prph(priv, KDR_SCD_INTERRUPT_MASK, (1 << txq_id));
4160         iwl4965_txq_ctx_deactivate(priv, txq_id);
4161         iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 0);
4162
4163         return 0;
4164 }
4165
4166 int iwl4965_check_empty_hw_queue(struct iwl4965_priv *priv, int sta_id,
4167                                          u8 tid, int txq_id)
4168 {
4169         struct iwl4965_queue *q = &priv->txq[txq_id].q;
4170         u8 *addr = priv->stations[sta_id].sta.sta.addr;
4171         struct iwl4965_tid_data *tid_data = &priv->stations[sta_id].tid[tid];
4172
4173         switch (priv->stations[sta_id].tid[tid].agg.state) {
4174         case IWL_EMPTYING_HW_QUEUE_DELBA:
4175                 /* We are reclaiming the last packet of the */
4176                 /* aggregated HW queue */
4177                 if (txq_id  == tid_data->agg.txq_id &&
4178                     q->read_ptr == q->write_ptr) {
4179                         u16 ssn = SEQ_TO_SN(tid_data->seq_number);
4180                         int tx_fifo = default_tid_to_tx_fifo[tid];
4181                         IWL_DEBUG_HT("HW queue empty: continue DELBA flow\n");
4182                         iwl4965_tx_queue_agg_disable(priv, txq_id,
4183                                                      ssn, tx_fifo);
4184                         tid_data->agg.state = IWL_AGG_OFF;
4185                         ieee80211_stop_tx_ba_cb_irqsafe(priv->hw, addr, tid);
4186                 }
4187                 break;
4188         case IWL_EMPTYING_HW_QUEUE_ADDBA:
4189                 /* We are reclaiming the last packet of the queue */
4190                 if (tid_data->tfds_in_queue == 0) {
4191                         IWL_DEBUG_HT("HW queue empty: continue ADDBA flow\n");
4192                         tid_data->agg.state = IWL_AGG_ON;
4193                         ieee80211_start_tx_ba_cb_irqsafe(priv->hw, addr, tid);
4194                 }
4195                 break;
4196         }
4197         return 0;
4198 }
4199
4200 /**
4201  * iwl4965_queue_dec_wrap - Decrement queue index, wrap back to end if needed
4202  * @index -- current index
4203  * @n_bd -- total number of entries in queue (s/b power of 2)
4204  */
4205 static inline int iwl4965_queue_dec_wrap(int index, int n_bd)
4206 {
4207         return (index == 0) ? n_bd - 1 : index - 1;
4208 }
4209
4210 /**
4211  * iwl4965_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
4212  *
4213  * Handles block-acknowledge notification from device, which reports success
4214  * of frames sent via aggregation.
4215  */
4216 static void iwl4965_rx_reply_compressed_ba(struct iwl4965_priv *priv,
4217                                            struct iwl4965_rx_mem_buffer *rxb)
4218 {
4219         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
4220         struct iwl4965_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba;
4221         int index;
4222         struct iwl4965_tx_queue *txq = NULL;
4223         struct iwl4965_ht_agg *agg;
4224         DECLARE_MAC_BUF(mac);
4225
4226         /* "flow" corresponds to Tx queue */
4227         u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
4228
4229         /* "ssn" is start of block-ack Tx window, corresponds to index
4230          * (in Tx queue's circular buffer) of first TFD/frame in window */
4231         u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
4232
4233         if (scd_flow >= ARRAY_SIZE(priv->txq)) {
4234                 IWL_ERROR("BUG_ON scd_flow is bigger than number of queues");
4235                 return;
4236         }
4237
4238         txq = &priv->txq[scd_flow];
4239         agg = &priv->stations[ba_resp->sta_id].tid[ba_resp->tid].agg;
4240
4241         /* Find index just before block-ack window */
4242         index = iwl4965_queue_dec_wrap(ba_resp_scd_ssn & 0xff, txq->q.n_bd);
4243
4244         /* TODO: Need to get this copy more safely - now good for debug */
4245
4246         IWL_DEBUG_TX_REPLY("REPLY_COMPRESSED_BA [%d]Received from %s, "
4247                            "sta_id = %d\n",
4248                            agg->wait_for_ba,
4249                            print_mac(mac, (u8*) &ba_resp->sta_addr_lo32),
4250                            ba_resp->sta_id);
4251         IWL_DEBUG_TX_REPLY("TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = "
4252                            "%d, scd_ssn = %d\n",
4253                            ba_resp->tid,
4254                            ba_resp->seq_ctl,
4255                            ba_resp->bitmap,
4256                            ba_resp->scd_flow,
4257                            ba_resp->scd_ssn);
4258         IWL_DEBUG_TX_REPLY("DAT start_idx = %d, bitmap = 0x%llx \n",
4259                            agg->start_idx,
4260                            agg->bitmap);
4261
4262         /* Update driver's record of ACK vs. not for each frame in window */
4263         iwl4965_tx_status_reply_compressed_ba(priv, agg, ba_resp);
4264
4265         /* Release all TFDs before the SSN, i.e. all TFDs in front of
4266          * block-ack window (we assume that they've been successfully
4267          * transmitted ... if not, it's too late anyway). */
4268         if (txq->q.read_ptr != (ba_resp_scd_ssn & 0xff)) {
4269                 int freed = iwl4965_tx_queue_reclaim(priv, scd_flow, index);
4270                 priv->stations[ba_resp->sta_id].
4271                         tid[ba_resp->tid].tfds_in_queue -= freed;
4272                 if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
4273                         priv->mac80211_registered &&
4274                         agg->state != IWL_EMPTYING_HW_QUEUE_DELBA)
4275                         ieee80211_wake_queue(priv->hw, scd_flow);
4276                 iwl4965_check_empty_hw_queue(priv, ba_resp->sta_id,
4277                         ba_resp->tid, scd_flow);
4278         }
4279 }
4280
4281 /**
4282  * iwl4965_tx_queue_set_q2ratid - Map unique receiver/tid combination to a queue
4283  */
4284 static int iwl4965_tx_queue_set_q2ratid(struct iwl4965_priv *priv, u16 ra_tid,
4285                                         u16 txq_id)
4286 {
4287         u32 tbl_dw_addr;
4288         u32 tbl_dw;
4289         u16 scd_q2ratid;
4290
4291         scd_q2ratid = ra_tid & SCD_QUEUE_RA_TID_MAP_RATID_MSK;
4292
4293         tbl_dw_addr = priv->scd_base_addr +
4294                         SCD_TRANSLATE_TBL_OFFSET_QUEUE(txq_id);
4295
4296         tbl_dw = iwl4965_read_targ_mem(priv, tbl_dw_addr);
4297
4298         if (txq_id & 0x1)
4299                 tbl_dw = (scd_q2ratid << 16) | (tbl_dw & 0x0000FFFF);
4300         else
4301                 tbl_dw = scd_q2ratid | (tbl_dw & 0xFFFF0000);
4302
4303         iwl4965_write_targ_mem(priv, tbl_dw_addr, tbl_dw);
4304
4305         return 0;
4306 }
4307
4308
4309 /**
4310  * iwl4965_tx_queue_agg_enable - Set up & enable aggregation for selected queue
4311  *
4312  * NOTE:  txq_id must be greater than IWL_BACK_QUEUE_FIRST_ID,
4313  *        i.e. it must be one of the higher queues used for aggregation
4314  */
4315 static int iwl4965_tx_queue_agg_enable(struct iwl4965_priv *priv, int txq_id,
4316                                        int tx_fifo, int sta_id, int tid,
4317                                        u16 ssn_idx)
4318 {
4319         unsigned long flags;
4320         int rc;
4321         u16 ra_tid;
4322
4323         if (IWL_BACK_QUEUE_FIRST_ID > txq_id)
4324                 IWL_WARNING("queue number too small: %d, must be > %d\n",
4325                         txq_id, IWL_BACK_QUEUE_FIRST_ID);
4326
4327         ra_tid = BUILD_RAxTID(sta_id, tid);
4328
4329         /* Modify device's station table to Tx this TID */
4330         iwl4965_sta_modify_enable_tid_tx(priv, sta_id, tid);
4331
4332         spin_lock_irqsave(&priv->lock, flags);
4333         rc = iwl4965_grab_nic_access(priv);
4334         if (rc) {
4335                 spin_unlock_irqrestore(&priv->lock, flags);
4336                 return rc;
4337         }
4338
4339         /* Stop this Tx queue before configuring it */
4340         iwl4965_tx_queue_stop_scheduler(priv, txq_id);
4341
4342         /* Map receiver-address / traffic-ID to this queue */
4343         iwl4965_tx_queue_set_q2ratid(priv, ra_tid, txq_id);
4344
4345         /* Set this queue as a chain-building queue */
4346         iwl4965_set_bits_prph(priv, KDR_SCD_QUEUECHAIN_SEL, (1 << txq_id));
4347
4348         /* Place first TFD at index corresponding to start sequence number.
4349          * Assumes that ssn_idx is valid (!= 0xFFF) */
4350         priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
4351         priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
4352         iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
4353
4354         /* Set up Tx window size and frame limit for this queue */
4355         iwl4965_write_targ_mem(priv,
4356                         priv->scd_base_addr + SCD_CONTEXT_QUEUE_OFFSET(txq_id),
4357                         (SCD_WIN_SIZE << SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
4358                         SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
4359
4360         iwl4965_write_targ_mem(priv, priv->scd_base_addr +
4361                         SCD_CONTEXT_QUEUE_OFFSET(txq_id) + sizeof(u32),
4362                         (SCD_FRAME_LIMIT << SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS)
4363                         & SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
4364
4365         iwl4965_set_bits_prph(priv, KDR_SCD_INTERRUPT_MASK, (1 << txq_id));
4366
4367         /* Set up Status area in SRAM, map to Tx DMA/FIFO, activate the queue */
4368         iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 1);
4369
4370         iwl4965_release_nic_access(priv);
4371         spin_unlock_irqrestore(&priv->lock, flags);
4372
4373         return 0;
4374 }
4375
4376 #endif /* CONFIG_IWL4965_HT */
4377
4378 /**
4379  * iwl4965_add_station - Initialize a station's hardware rate table
4380  *
4381  * The uCode's station table contains a table of fallback rates
4382  * for automatic fallback during transmission.
4383  *
4384  * NOTE: This sets up a default set of values.  These will be replaced later
4385  *       if the driver's iwl-4965-rs rate scaling algorithm is used, instead of
4386  *       rc80211_simple.
4387  *
4388  * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
4389  *       calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
4390  *       which requires station table entry to exist).
4391  */
4392 void iwl4965_add_station(struct iwl4965_priv *priv, const u8 *addr, int is_ap)
4393 {
4394         int i, r;
4395         struct iwl4965_link_quality_cmd link_cmd = {
4396                 .reserved1 = 0,
4397         };
4398         u16 rate_flags;
4399
4400         /* Set up the rate scaling to start at selected rate, fall back
4401          * all the way down to 1M in IEEE order, and then spin on 1M */
4402         if (is_ap)
4403                 r = IWL_RATE_54M_INDEX;
4404         else if (priv->band == IEEE80211_BAND_5GHZ)
4405                 r = IWL_RATE_6M_INDEX;
4406         else
4407                 r = IWL_RATE_1M_INDEX;
4408
4409         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
4410                 rate_flags = 0;
4411                 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
4412                         rate_flags |= RATE_MCS_CCK_MSK;
4413
4414                 /* Use Tx antenna B only */
4415                 rate_flags |= RATE_MCS_ANT_B_MSK;
4416                 rate_flags &= ~RATE_MCS_ANT_A_MSK;
4417
4418                 link_cmd.rs_table[i].rate_n_flags =
4419                         iwl4965_hw_set_rate_n_flags(iwl4965_rates[r].plcp, rate_flags);
4420                 r = iwl4965_get_prev_ieee_rate(r);
4421         }
4422
4423         link_cmd.general_params.single_stream_ant_msk = 2;
4424         link_cmd.general_params.dual_stream_ant_msk = 3;
4425         link_cmd.agg_params.agg_dis_start_th = 3;
4426         link_cmd.agg_params.agg_time_limit = cpu_to_le16(4000);
4427
4428         /* Update the rate scaling for control frame Tx to AP */
4429         link_cmd.sta_id = is_ap ? IWL_AP_ID : IWL4965_BROADCAST_ID;
4430
4431         iwl4965_send_cmd_pdu(priv, REPLY_TX_LINK_QUALITY_CMD, sizeof(link_cmd),
4432                          &link_cmd);
4433 }
4434
4435 #ifdef CONFIG_IWL4965_HT
4436
4437 static u8 iwl4965_is_channel_extension(struct iwl4965_priv *priv,
4438                                        enum ieee80211_band band,
4439                                        u16 channel, u8 extension_chan_offset)
4440 {
4441         const struct iwl4965_channel_info *ch_info;
4442
4443         ch_info = iwl4965_get_channel_info(priv, band, channel);
4444         if (!is_channel_valid(ch_info))
4445                 return 0;
4446
4447         if (extension_chan_offset == IWL_EXT_CHANNEL_OFFSET_NONE)
4448                 return 0;
4449
4450         if ((ch_info->fat_extension_channel == extension_chan_offset) ||
4451             (ch_info->fat_extension_channel == HT_IE_EXT_CHANNEL_MAX))
4452                 return 1;
4453
4454         return 0;
4455 }
4456
4457 static u8 iwl4965_is_fat_tx_allowed(struct iwl4965_priv *priv,
4458                                 struct ieee80211_ht_info *sta_ht_inf)
4459 {
4460         struct iwl_ht_info *iwl_ht_conf = &priv->current_ht_config;
4461
4462         if ((!iwl_ht_conf->is_ht) ||
4463            (iwl_ht_conf->supported_chan_width != IWL_CHANNEL_WIDTH_40MHZ) ||
4464            (iwl_ht_conf->extension_chan_offset == IWL_EXT_CHANNEL_OFFSET_NONE))
4465                 return 0;
4466
4467         if (sta_ht_inf) {
4468                 if ((!sta_ht_inf->ht_supported) ||
4469                    (!(sta_ht_inf->cap & IEEE80211_HT_CAP_SUP_WIDTH)))
4470                         return 0;
4471         }
4472
4473         return (iwl4965_is_channel_extension(priv, priv->band,
4474                                          iwl_ht_conf->control_channel,
4475                                          iwl_ht_conf->extension_chan_offset));
4476 }
4477
4478 void iwl4965_set_rxon_ht(struct iwl4965_priv *priv, struct iwl_ht_info *ht_info)
4479 {
4480         struct iwl4965_rxon_cmd *rxon = &priv->staging_rxon;
4481         u32 val;
4482
4483         if (!ht_info->is_ht)
4484                 return;
4485
4486         /* Set up channel bandwidth:  20 MHz only, or 20/40 mixed if fat ok */
4487         if (iwl4965_is_fat_tx_allowed(priv, NULL))
4488                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED_MSK;
4489         else
4490                 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
4491                                  RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
4492
4493         if (le16_to_cpu(rxon->channel) != ht_info->control_channel) {
4494                 IWL_DEBUG_ASSOC("control diff than current %d %d\n",
4495                                 le16_to_cpu(rxon->channel),
4496                                 ht_info->control_channel);
4497                 rxon->channel = cpu_to_le16(ht_info->control_channel);
4498                 return;
4499         }
4500
4501         /* Note: control channel is opposite of extension channel */
4502         switch (ht_info->extension_chan_offset) {
4503         case IWL_EXT_CHANNEL_OFFSET_ABOVE:
4504                 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
4505                 break;
4506         case IWL_EXT_CHANNEL_OFFSET_BELOW:
4507                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
4508                 break;
4509         case IWL_EXT_CHANNEL_OFFSET_NONE:
4510         default:
4511                 rxon->flags &= ~RXON_FLG_CHANNEL_MODE_MIXED_MSK;
4512                 break;
4513         }
4514
4515         val = ht_info->ht_protection;
4516
4517         rxon->flags |= cpu_to_le32(val << RXON_FLG_HT_OPERATING_MODE_POS);
4518
4519         iwl4965_set_rxon_chain(priv);
4520
4521         IWL_DEBUG_ASSOC("supported HT rate 0x%X %X "
4522                         "rxon flags 0x%X operation mode :0x%X "
4523                         "extension channel offset 0x%x "
4524                         "control chan %d\n",
4525                         ht_info->supp_mcs_set[0], ht_info->supp_mcs_set[1],
4526                         le32_to_cpu(rxon->flags), ht_info->ht_protection,
4527                         ht_info->extension_chan_offset,
4528                         ht_info->control_channel);
4529         return;
4530 }
4531
4532 void iwl4965_set_ht_add_station(struct iwl4965_priv *priv, u8 index,
4533                                 struct ieee80211_ht_info *sta_ht_inf)
4534 {
4535         __le32 sta_flags;
4536         u8 mimo_ps_mode;
4537
4538         if (!sta_ht_inf || !sta_ht_inf->ht_supported)
4539                 goto done;
4540
4541         mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2;
4542
4543         sta_flags = priv->stations[index].sta.station_flags;
4544
4545         sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
4546
4547         switch (mimo_ps_mode) {
4548         case WLAN_HT_CAP_MIMO_PS_STATIC:
4549                 sta_flags |= STA_FLG_MIMO_DIS_MSK;
4550                 break;
4551         case WLAN_HT_CAP_MIMO_PS_DYNAMIC:
4552                 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
4553                 break;
4554         case WLAN_HT_CAP_MIMO_PS_DISABLED:
4555                 break;
4556         default:
4557                 IWL_WARNING("Invalid MIMO PS mode %d", mimo_ps_mode);
4558                 break;
4559         }
4560
4561         sta_flags |= cpu_to_le32(
4562               (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
4563
4564         sta_flags |= cpu_to_le32(
4565               (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
4566
4567         if (iwl4965_is_fat_tx_allowed(priv, sta_ht_inf))
4568                 sta_flags |= STA_FLG_FAT_EN_MSK;
4569         else
4570                 sta_flags &= ~STA_FLG_FAT_EN_MSK;
4571
4572         priv->stations[index].sta.station_flags = sta_flags;
4573  done:
4574         return;
4575 }
4576
4577 static void iwl4965_sta_modify_add_ba_tid(struct iwl4965_priv *priv,
4578                                           int sta_id, int tid, u16 ssn)
4579 {
4580         unsigned long flags;
4581
4582         spin_lock_irqsave(&priv->sta_lock, flags);
4583         priv->stations[sta_id].sta.station_flags_msk = 0;
4584         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
4585         priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
4586         priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
4587         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
4588         spin_unlock_irqrestore(&priv->sta_lock, flags);
4589
4590         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
4591 }
4592
4593 static void iwl4965_sta_modify_del_ba_tid(struct iwl4965_priv *priv,
4594                                           int sta_id, int tid)
4595 {
4596         unsigned long flags;
4597
4598         spin_lock_irqsave(&priv->sta_lock, flags);
4599         priv->stations[sta_id].sta.station_flags_msk = 0;
4600         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
4601         priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
4602         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
4603         spin_unlock_irqrestore(&priv->sta_lock, flags);
4604
4605         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
4606 }
4607
4608 /*
4609  * Find first available (lowest unused) Tx Queue, mark it "active".
4610  * Called only when finding queue for aggregation.
4611  * Should never return anything < 7, because they should already
4612  * be in use as EDCA AC (0-3), Command (4), HCCA (5, 6).
4613  */
4614 static int iwl4965_txq_ctx_activate_free(struct iwl4965_priv *priv)
4615 {
4616         int txq_id;
4617
4618         for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++)
4619                 if (!test_and_set_bit(txq_id, &priv->txq_ctx_active_msk))
4620                         return txq_id;
4621         return -1;
4622 }
4623
4624 static int iwl4965_mac_ht_tx_agg_start(struct ieee80211_hw *hw, const u8 *da,
4625                                        u16 tid, u16 *start_seq_num)
4626 {
4627         struct iwl4965_priv *priv = hw->priv;
4628         int sta_id;
4629         int tx_fifo;
4630         int txq_id;
4631         int ssn = -1;
4632         int rc = 0;
4633         unsigned long flags;
4634         struct iwl4965_tid_data *tid_data;
4635         DECLARE_MAC_BUF(mac);
4636
4637         if (likely(tid < ARRAY_SIZE(default_tid_to_tx_fifo)))
4638                 tx_fifo = default_tid_to_tx_fifo[tid];
4639         else
4640                 return -EINVAL;
4641
4642         IWL_WARNING("%s on da = %s tid = %d\n",
4643                         __func__, print_mac(mac, da), tid);
4644
4645         sta_id = iwl4965_hw_find_station(priv, da);
4646         if (sta_id == IWL_INVALID_STATION)
4647                 return -ENXIO;
4648
4649         if (priv->stations[sta_id].tid[tid].agg.state != IWL_AGG_OFF) {
4650                 IWL_ERROR("Start AGG when state is not IWL_AGG_OFF !\n");
4651                 return -ENXIO;
4652         }
4653
4654         txq_id = iwl4965_txq_ctx_activate_free(priv);
4655         if (txq_id == -1)
4656                 return -ENXIO;
4657
4658         spin_lock_irqsave(&priv->sta_lock, flags);
4659         tid_data = &priv->stations[sta_id].tid[tid];
4660         ssn = SEQ_TO_SN(tid_data->seq_number);
4661         tid_data->agg.txq_id = txq_id;
4662         spin_unlock_irqrestore(&priv->sta_lock, flags);
4663
4664         *start_seq_num = ssn;
4665         rc = iwl4965_tx_queue_agg_enable(priv, txq_id, tx_fifo,
4666                                            sta_id, tid, ssn);
4667         if (rc)
4668                 return rc;
4669
4670         rc = 0;
4671         if (tid_data->tfds_in_queue == 0) {
4672                 printk(KERN_ERR "HW queue is empty\n");
4673                 tid_data->agg.state = IWL_AGG_ON;
4674                 ieee80211_start_tx_ba_cb_irqsafe(hw, da, tid);
4675         } else {
4676                 IWL_DEBUG_HT("HW queue is NOT empty: %d packets in HW queue\n",
4677                                 tid_data->tfds_in_queue);
4678                 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA;
4679         }
4680         return rc;
4681 }
4682
4683 static int iwl4965_mac_ht_tx_agg_stop(struct ieee80211_hw *hw, const u8 *da,
4684                                       u16 tid)
4685 {
4686
4687         struct iwl4965_priv *priv = hw->priv;
4688         int tx_fifo_id, txq_id, sta_id, ssn = -1;
4689         struct iwl4965_tid_data *tid_data;
4690         int rc, write_ptr, read_ptr;
4691         unsigned long flags;
4692         DECLARE_MAC_BUF(mac);
4693
4694         if (!da) {
4695                 IWL_ERROR("da = NULL\n");
4696                 return -EINVAL;
4697         }
4698
4699         if (likely(tid < ARRAY_SIZE(default_tid_to_tx_fifo)))
4700                 tx_fifo_id = default_tid_to_tx_fifo[tid];
4701         else
4702                 return -EINVAL;
4703
4704         sta_id = iwl4965_hw_find_station(priv, da);
4705
4706         if (sta_id == IWL_INVALID_STATION)
4707                 return -ENXIO;
4708
4709         if (priv->stations[sta_id].tid[tid].agg.state != IWL_AGG_ON)
4710                 IWL_WARNING("Stopping AGG while state not IWL_AGG_ON\n");
4711
4712         tid_data = &priv->stations[sta_id].tid[tid];
4713         ssn = (tid_data->seq_number & IEEE80211_SCTL_SEQ) >> 4;
4714         txq_id = tid_data->agg.txq_id;
4715         write_ptr = priv->txq[txq_id].q.write_ptr;
4716         read_ptr = priv->txq[txq_id].q.read_ptr;
4717
4718         /* The queue is not empty */
4719         if (write_ptr != read_ptr) {
4720                 IWL_DEBUG_HT("Stopping a non empty AGG HW QUEUE\n");
4721                 priv->stations[sta_id].tid[tid].agg.state =
4722                                 IWL_EMPTYING_HW_QUEUE_DELBA;
4723                 return 0;
4724         }
4725
4726         IWL_DEBUG_HT("HW queue empty\n");;
4727         priv->stations[sta_id].tid[tid].agg.state = IWL_AGG_OFF;
4728
4729         spin_lock_irqsave(&priv->lock, flags);
4730         rc = iwl4965_grab_nic_access(priv);
4731         if (rc) {
4732                 spin_unlock_irqrestore(&priv->lock, flags);
4733                 return rc;
4734         }
4735         rc = iwl4965_tx_queue_agg_disable(priv, txq_id, ssn, tx_fifo_id);
4736         iwl4965_release_nic_access(priv);
4737         spin_unlock_irqrestore(&priv->lock, flags);
4738
4739         if (rc)
4740                 return rc;
4741
4742         ieee80211_stop_tx_ba_cb_irqsafe(priv->hw, da, tid);
4743
4744         IWL_DEBUG_INFO("iwl4965_mac_ht_tx_agg_stop on da=%s tid=%d\n",
4745                         print_mac(mac, da), tid);
4746
4747         return 0;
4748 }
4749
4750 int iwl4965_mac_ampdu_action(struct ieee80211_hw *hw,
4751                              enum ieee80211_ampdu_mlme_action action,
4752                              const u8 *addr, u16 tid, u16 *ssn)
4753 {
4754         struct iwl4965_priv *priv = hw->priv;
4755         int sta_id;
4756         DECLARE_MAC_BUF(mac);
4757
4758         IWL_DEBUG_HT("A-MPDU action on da=%s tid=%d ",
4759                         print_mac(mac, addr), tid);
4760         sta_id = iwl4965_hw_find_station(priv, addr);
4761         switch (action) {
4762         case IEEE80211_AMPDU_RX_START:
4763                 IWL_DEBUG_HT("start Rx\n");
4764                 iwl4965_sta_modify_add_ba_tid(priv, sta_id, tid, *ssn);
4765                 break;
4766         case IEEE80211_AMPDU_RX_STOP:
4767                 IWL_DEBUG_HT("stop Rx\n");
4768                 iwl4965_sta_modify_del_ba_tid(priv, sta_id, tid);
4769                 break;
4770         case IEEE80211_AMPDU_TX_START:
4771                 IWL_DEBUG_HT("start Tx\n");
4772                 return iwl4965_mac_ht_tx_agg_start(hw, addr, tid, ssn);
4773         case IEEE80211_AMPDU_TX_STOP:
4774                 IWL_DEBUG_HT("stop Tx\n");
4775                 return iwl4965_mac_ht_tx_agg_stop(hw, addr, tid);
4776         default:
4777                 IWL_DEBUG_HT("unknown\n");
4778                 return -EINVAL;
4779                 break;
4780         }
4781         return 0;
4782 }
4783
4784 #endif /* CONFIG_IWL4965_HT */
4785
4786 /* Set up 4965-specific Rx frame reply handlers */
4787 void iwl4965_hw_rx_handler_setup(struct iwl4965_priv *priv)
4788 {
4789         /* Legacy Rx frames */
4790         priv->rx_handlers[REPLY_4965_RX] = iwl4965_rx_reply_rx;
4791
4792         /* High-throughput (HT) Rx frames */
4793         priv->rx_handlers[REPLY_RX_PHY_CMD] = iwl4965_rx_reply_rx_phy;
4794         priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwl4965_rx_reply_rx;
4795
4796         priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] =
4797             iwl4965_rx_missed_beacon_notif;
4798
4799 #ifdef CONFIG_IWL4965_HT
4800         priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl4965_rx_reply_compressed_ba;
4801 #endif /* CONFIG_IWL4965_HT */
4802 }
4803
4804 void iwl4965_hw_setup_deferred_work(struct iwl4965_priv *priv)
4805 {
4806         INIT_WORK(&priv->txpower_work, iwl4965_bg_txpower_work);
4807         INIT_WORK(&priv->statistics_work, iwl4965_bg_statistics_work);
4808 #ifdef CONFIG_IWL4965_SENSITIVITY
4809         INIT_WORK(&priv->sensitivity_work, iwl4965_bg_sensitivity_work);
4810 #endif
4811         init_timer(&priv->statistics_periodic);
4812         priv->statistics_periodic.data = (unsigned long)priv;
4813         priv->statistics_periodic.function = iwl4965_bg_statistics_periodic;
4814 }
4815
4816 void iwl4965_hw_cancel_deferred_work(struct iwl4965_priv *priv)
4817 {
4818         del_timer_sync(&priv->statistics_periodic);
4819
4820         cancel_delayed_work(&priv->init_alive_start);
4821 }
4822
4823 struct pci_device_id iwl4965_hw_card_ids[] = {
4824         {PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x4229)},
4825         {PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x4230)},
4826         {0}
4827 };
4828
4829 /*
4830  * The device's EEPROM semaphore prevents conflicts between driver and uCode
4831  * when accessing the EEPROM; each access is a series of pulses to/from the
4832  * EEPROM chip, not a single event, so even reads could conflict if they
4833  * weren't arbitrated by the semaphore.
4834  */
4835 int iwl4965_eeprom_acquire_semaphore(struct iwl4965_priv *priv)
4836 {
4837         u16 count;
4838         int rc;
4839
4840         for (count = 0; count < EEPROM_SEM_RETRY_LIMIT; count++) {
4841                 /* Request semaphore */
4842                 iwl4965_set_bit(priv, CSR_HW_IF_CONFIG_REG,
4843                         CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM);
4844
4845                 /* See if we got it */
4846                 rc = iwl4965_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
4847                                         CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM,
4848                                         CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM,
4849                                         EEPROM_SEM_TIMEOUT);
4850                 if (rc >= 0) {
4851                         IWL_DEBUG_IO("Acquired semaphore after %d tries.\n",
4852                                 count+1);
4853                         return rc;
4854                 }
4855         }
4856
4857         return rc;
4858 }
4859
4860 MODULE_DEVICE_TABLE(pci, iwl4965_hw_card_ids);