git.oblomov.eu Git - linux-2.6/blob - drivers/net/wireless/iwlwifi/iwl-4965.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2008 Intel Corporation. All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of version 2 of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  17  *
  18  * The full GNU General Public License is included in this distribution in the
  19  * file called LICENSE.
  20  *
  21  * Contact Information:
  22  * James P. Ketrenos <ipw2100-admin@linux.intel.com>
  23  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  24  *
  25  *****************************************************************************/
  26
  27 #include <linux/kernel.h>
  28 #include <linux/module.h>
  29 #include <linux/version.h>
  30 #include <linux/init.h>
  31 #include <linux/pci.h>
  32 #include <linux/dma-mapping.h>
  33 #include <linux/delay.h>
  34 #include <linux/skbuff.h>
  35 #include <linux/netdevice.h>
  36 #include <linux/wireless.h>
  37 #include <net/mac80211.h>
  38 #include <linux/etherdevice.h>
  39 #include <asm/unaligned.h>
  40
  41 #include "iwl-eeprom.h"
  42 #include "iwl-core.h"
  43 #include "iwl-4965.h"
  44 #include "iwl-helpers.h"
  45
  46 static void iwl4965_hw_card_show_info(struct iwl4965_priv *priv);
  47
  48 #define IWL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np)    \
  49         [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP,      \
  50                                     IWL_RATE_SISO_##s##M_PLCP, \
  51                                     IWL_RATE_MIMO_##s##M_PLCP, \
  52                                     IWL_RATE_##r##M_IEEE,      \
  53                                     IWL_RATE_##ip##M_INDEX,    \
  54                                     IWL_RATE_##in##M_INDEX,    \
  55                                     IWL_RATE_##rp##M_INDEX,    \
  56                                     IWL_RATE_##rn##M_INDEX,    \
  57                                     IWL_RATE_##pp##M_INDEX,    \
  58                                     IWL_RATE_##np##M_INDEX }
  59
  60 /*
  61  * Parameter order:
  62  *   rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate
  63  *
  64  * If there isn't a valid next or previous rate then INV is used which
  65  * maps to IWL_RATE_INVALID
  66  *
  67  */
  68 const struct iwl4965_rate_info iwl4965_rates[IWL_RATE_COUNT] = {
  69         IWL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2),    /*  1mbps */
  70         IWL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5),          /*  2mbps */
  71         IWL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11),        /*5.5mbps */
  72         IWL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18),      /* 11mbps */
  73         IWL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11),        /*  6mbps */
  74         IWL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11),       /*  9mbps */
  75         IWL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18),   /* 12mbps */
  76         IWL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24),   /* 18mbps */
  77         IWL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36),   /* 24mbps */
  78         IWL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48),   /* 36mbps */
  79         IWL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54),   /* 48mbps */
  80         IWL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */
  81         IWL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */
  82 };
  83
  84 #ifdef CONFIG_IWL4965_HT
  85
  86 static const u16 default_tid_to_tx_fifo[] = {
  87         IWL_TX_FIFO_AC1,
  88         IWL_TX_FIFO_AC0,
  89         IWL_TX_FIFO_AC0,
  90         IWL_TX_FIFO_AC1,
  91         IWL_TX_FIFO_AC2,
  92         IWL_TX_FIFO_AC2,
  93         IWL_TX_FIFO_AC3,
  94         IWL_TX_FIFO_AC3,
  95         IWL_TX_FIFO_NONE,
  96         IWL_TX_FIFO_NONE,
  97         IWL_TX_FIFO_NONE,
  98         IWL_TX_FIFO_NONE,
  99         IWL_TX_FIFO_NONE,
 100         IWL_TX_FIFO_NONE,
 101         IWL_TX_FIFO_NONE,
 102         IWL_TX_FIFO_NONE,
 103         IWL_TX_FIFO_AC3
 104 };
 105
 106 #endif  /*CONFIG_IWL4965_HT */
 107
 108 static int is_fat_channel(__le32 rxon_flags)
 109 {
 110         return (rxon_flags & RXON_FLG_CHANNEL_MODE_PURE_40_MSK) ||
 111                 (rxon_flags & RXON_FLG_CHANNEL_MODE_MIXED_MSK);
 112 }
 113
 114 static u8 is_single_stream(struct iwl4965_priv *priv)
 115 {
 116 #ifdef CONFIG_IWL4965_HT
 117         if (!priv->current_ht_config.is_ht ||
 118             (priv->current_ht_config.supp_mcs_set[1] == 0) ||
 119             (priv->ps_mode == IWL_MIMO_PS_STATIC))
 120                 return 1;
 121 #else
 122         return 1;
 123 #endif  /*CONFIG_IWL4965_HT */
 124         return 0;
 125 }
 126
 127 int iwl4965_hwrate_to_plcp_idx(u32 rate_n_flags)
 128 {
 129         int idx = 0;
 130
 131         /* 4965 HT rate format */
 132         if (rate_n_flags & RATE_MCS_HT_MSK) {
 133                 idx = (rate_n_flags & 0xff);
 134
 135                 if (idx >= IWL_RATE_MIMO_6M_PLCP)
 136                         idx = idx - IWL_RATE_MIMO_6M_PLCP;
 137
 138                 idx += IWL_FIRST_OFDM_RATE;
 139                 /* skip 9M not supported in ht*/
 140                 if (idx >= IWL_RATE_9M_INDEX)
 141                         idx += 1;
 142                 if ((idx >= IWL_FIRST_OFDM_RATE) && (idx <= IWL_LAST_OFDM_RATE))
 143                         return idx;
 144
 145         /* 4965 legacy rate format, search for match in table */
 146         } else {
 147                 for (idx = 0; idx < ARRAY_SIZE(iwl4965_rates); idx++)
 148                         if (iwl4965_rates[idx].plcp == (rate_n_flags & 0xFF))
 149                                 return idx;
 150         }
 151
 152         return -1;
 153 }
 154
 155 /**
 156  * translate ucode response to mac80211 tx status control values
 157  */
 158 void iwl4965_hwrate_to_tx_control(struct iwl4965_priv *priv, u32 rate_n_flags,
 159                                   struct ieee80211_tx_control *control)
 160 {
 161         int rate_index;
 162
 163         control->antenna_sel_tx =
 164                 ((rate_n_flags & RATE_MCS_ANT_AB_MSK) >> RATE_MCS_ANT_A_POS);
 165         if (rate_n_flags & RATE_MCS_HT_MSK)
 166                 control->flags |= IEEE80211_TXCTL_OFDM_HT;
 167         if (rate_n_flags & RATE_MCS_GF_MSK)
 168                 control->flags |= IEEE80211_TXCTL_GREEN_FIELD;
 169         if (rate_n_flags & RATE_MCS_FAT_MSK)
 170                 control->flags |= IEEE80211_TXCTL_40_MHZ_WIDTH;
 171         if (rate_n_flags & RATE_MCS_DUP_MSK)
 172                 control->flags |= IEEE80211_TXCTL_DUP_DATA;
 173         if (rate_n_flags & RATE_MCS_SGI_MSK)
 174                 control->flags |= IEEE80211_TXCTL_SHORT_GI;
 175         /* since iwl4965_hwrate_to_plcp_idx is band indifferent, we always use
 176          * IEEE80211_BAND_2GHZ band as it contains all the rates */
 177         rate_index = iwl4965_hwrate_to_plcp_idx(rate_n_flags);
 178         if (rate_index == -1)
 179                 control->tx_rate = NULL;
 180         else
 181                 control->tx_rate =
 182                         &priv->bands[IEEE80211_BAND_2GHZ].bitrates[rate_index];
 183 }
 184
 185 /*
 186  * Determine how many receiver/antenna chains to use.
 187  * More provides better reception via diversity.  Fewer saves power.
 188  * MIMO (dual stream) requires at least 2, but works better with 3.
 189  * This does not determine *which* chains to use, just how many.
 190  */
 191 static int iwl4965_get_rx_chain_counter(struct iwl4965_priv *priv,
 192                                         u8 *idle_state, u8 *rx_state)
 193 {
 194         u8 is_single = is_single_stream(priv);
 195         u8 is_cam = test_bit(STATUS_POWER_PMI, &priv->status) ? 0 : 1;
 196
 197         /* # of Rx chains to use when expecting MIMO. */
 198         if (is_single || (!is_cam && (priv->ps_mode == IWL_MIMO_PS_STATIC)))
 199                 *rx_state = 2;
 200         else
 201                 *rx_state = 3;
 202
 203         /* # Rx chains when idling and maybe trying to save power */
 204         switch (priv->ps_mode) {
 205         case IWL_MIMO_PS_STATIC:
 206         case IWL_MIMO_PS_DYNAMIC:
 207                 *idle_state = (is_cam) ? 2 : 1;
 208                 break;
 209         case IWL_MIMO_PS_NONE:
 210                 *idle_state = (is_cam) ? *rx_state : 1;
 211                 break;
 212         default:
 213                 *idle_state = 1;
 214                 break;
 215         }
 216
 217         return 0;
 218 }
 219
 220 int iwl4965_hw_rxq_stop(struct iwl4965_priv *priv)
 221 {
 222         int rc;
 223         unsigned long flags;
 224
 225         spin_lock_irqsave(&priv->lock, flags);
 226         rc = iwl4965_grab_nic_access(priv);
 227         if (rc) {
 228                 spin_unlock_irqrestore(&priv->lock, flags);
 229                 return rc;
 230         }
 231
 232         /* stop Rx DMA */
 233         iwl4965_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0);
 234         rc = iwl4965_poll_direct_bit(priv, FH_MEM_RSSR_RX_STATUS_REG,
 235                                      (1 << 24), 1000);
 236         if (rc < 0)
 237                 IWL_ERROR("Can't stop Rx DMA.\n");
 238
 239         iwl4965_release_nic_access(priv);
 240         spin_unlock_irqrestore(&priv->lock, flags);
 241
 242         return 0;
 243 }
 244
 245 u8 iwl4965_hw_find_station(struct iwl4965_priv *priv, const u8 *addr)
 246 {
 247         int i;
 248         int start = 0;
 249         int ret = IWL_INVALID_STATION;
 250         unsigned long flags;
 251         DECLARE_MAC_BUF(mac);
 252
 253         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) ||
 254             (priv->iw_mode == IEEE80211_IF_TYPE_AP))
 255                 start = IWL_STA_ID;
 256
 257         if (is_broadcast_ether_addr(addr))
 258                 return priv->hw_setting.bcast_sta_id;
 259
 260         spin_lock_irqsave(&priv->sta_lock, flags);
 261         for (i = start; i < priv->hw_setting.max_stations; i++)
 262                 if ((priv->stations[i].used) &&
 263                     (!compare_ether_addr
 264                      (priv->stations[i].sta.sta.addr, addr))) {
 265                         ret = i;
 266                         goto out;
 267                 }
 268
 269         IWL_DEBUG_ASSOC_LIMIT("can not find STA %s total %d\n",
 270                         print_mac(mac, addr), priv->num_stations);
 271
 272  out:
 273         spin_unlock_irqrestore(&priv->sta_lock, flags);
 274         return ret;
 275 }
 276
 277 static int iwl4965_nic_set_pwr_src(struct iwl4965_priv *priv, int pwr_max)
 278 {
 279         int ret;
 280         unsigned long flags;
 281
 282         spin_lock_irqsave(&priv->lock, flags);
 283         ret = iwl4965_grab_nic_access(priv);
 284         if (ret) {
 285                 spin_unlock_irqrestore(&priv->lock, flags);
 286                 return ret;
 287         }
 288
 289         if (!pwr_max) {
 290                 u32 val;
 291
 292                 ret = pci_read_config_dword(priv->pci_dev, PCI_POWER_SOURCE,
 293                                            &val);
 294
 295                 if (val & PCI_CFG_PMC_PME_FROM_D3COLD_SUPPORT)
 296                         iwl4965_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 297                                 APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
 298                                 ~APMG_PS_CTRL_MSK_PWR_SRC);
 299         } else
 300                 iwl4965_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 301                         APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
 302                         ~APMG_PS_CTRL_MSK_PWR_SRC);
 303
 304         iwl4965_release_nic_access(priv);
 305         spin_unlock_irqrestore(&priv->lock, flags);
 306
 307         return ret;
 308 }
 309
 310 static int iwl4965_rx_init(struct iwl4965_priv *priv, struct iwl4965_rx_queue *rxq)
 311 {
 312         int rc;
 313         unsigned long flags;
 314         unsigned int rb_size;
 315
 316         spin_lock_irqsave(&priv->lock, flags);
 317         rc = iwl4965_grab_nic_access(priv);
 318         if (rc) {
 319                 spin_unlock_irqrestore(&priv->lock, flags);
 320                 return rc;
 321         }
 322
 323         if (iwl4965_param_amsdu_size_8K)
 324                 rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_8K;
 325         else
 326                 rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K;
 327
 328         /* Stop Rx DMA */
 329         iwl4965_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0);
 330
 331         /* Reset driver's Rx queue write index */
 332         iwl4965_write_direct32(priv, FH_RSCSR_CHNL0_RBDCB_WPTR_REG, 0);
 333
 334         /* Tell device where to find RBD circular buffer in DRAM */
 335         iwl4965_write_direct32(priv, FH_RSCSR_CHNL0_RBDCB_BASE_REG,
 336                              rxq->dma_addr >> 8);
 337
 338         /* Tell device where in DRAM to update its Rx status */
 339         iwl4965_write_direct32(priv, FH_RSCSR_CHNL0_STTS_WPTR_REG,
 340                              (priv->hw_setting.shared_phys +
 341                               offsetof(struct iwl4965_shared, val0)) >> 4);
 342
 343         /* Enable Rx DMA, enable host interrupt, Rx buffer size 4k, 256 RBDs */
 344         iwl4965_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG,
 345                              FH_RCSR_RX_CONFIG_CHNL_EN_ENABLE_VAL |
 346                              FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_INT_HOST_VAL |
 347                              rb_size |
 348                              /*0x10 << 4 | */
 349                              (RX_QUEUE_SIZE_LOG <<
 350                               FH_RCSR_RX_CONFIG_RBDCB_SIZE_BITSHIFT));
 351
 352         /*
 353          * iwl4965_write32(priv,CSR_INT_COAL_REG,0);
 354          */
 355
 356         iwl4965_release_nic_access(priv);
 357         spin_unlock_irqrestore(&priv->lock, flags);
 358
 359         return 0;
 360 }
 361
 362 /* Tell 4965 where to find the "keep warm" buffer */
 363 static int iwl4965_kw_init(struct iwl4965_priv *priv)
 364 {
 365         unsigned long flags;
 366         int rc;
 367
 368         spin_lock_irqsave(&priv->lock, flags);
 369         rc = iwl4965_grab_nic_access(priv);
 370         if (rc)
 371                 goto out;
 372
 373         iwl4965_write_direct32(priv, IWL_FH_KW_MEM_ADDR_REG,
 374                              priv->kw.dma_addr >> 4);
 375         iwl4965_release_nic_access(priv);
 376 out:
 377         spin_unlock_irqrestore(&priv->lock, flags);
 378         return rc;
 379 }
 380
 381 static int iwl4965_kw_alloc(struct iwl4965_priv *priv)
 382 {
 383         struct pci_dev *dev = priv->pci_dev;
 384         struct iwl4965_kw *kw = &priv->kw;
 385
 386         kw->size = IWL4965_KW_SIZE;     /* TBW need set somewhere else */
 387         kw->v_addr = pci_alloc_consistent(dev, kw->size, &kw->dma_addr);
 388         if (!kw->v_addr)
 389                 return -ENOMEM;
 390
 391         return 0;
 392 }
 393
 394 #define CHECK_AND_PRINT(x) ((eeprom_ch->flags & EEPROM_CHANNEL_##x) \
 395                             ? # x " " : "")
 396
 397 /**
 398  * iwl4965_set_fat_chan_info - Copy fat channel info into driver's priv.
 399  *
 400  * Does not set up a command, or touch hardware.
 401  */
 402 int iwl4965_set_fat_chan_info(struct iwl4965_priv *priv,
 403                               enum ieee80211_band band, u16 channel,
 404                               const struct iwl4965_eeprom_channel *eeprom_ch,
 405                               u8 fat_extension_channel)
 406 {
 407         struct iwl4965_channel_info *ch_info;
 408
 409         ch_info = (struct iwl4965_channel_info *)
 410                         iwl4965_get_channel_info(priv, band, channel);
 411
 412         if (!is_channel_valid(ch_info))
 413                 return -1;
 414
 415         IWL_DEBUG_INFO("FAT Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x"
 416                         " %ddBm): Ad-Hoc %ssupported\n",
 417                         ch_info->channel,
 418                         is_channel_a_band(ch_info) ?
 419                         "5.2" : "2.4",
 420                         CHECK_AND_PRINT(IBSS),
 421                         CHECK_AND_PRINT(ACTIVE),
 422                         CHECK_AND_PRINT(RADAR),
 423                         CHECK_AND_PRINT(WIDE),
 424                         CHECK_AND_PRINT(NARROW),
 425                         CHECK_AND_PRINT(DFS),
 426                         eeprom_ch->flags,
 427                         eeprom_ch->max_power_avg,
 428                         ((eeprom_ch->flags & EEPROM_CHANNEL_IBSS)
 429                          && !(eeprom_ch->flags & EEPROM_CHANNEL_RADAR)) ?
 430                         "" : "not ");
 431
 432         ch_info->fat_eeprom = *eeprom_ch;
 433         ch_info->fat_max_power_avg = eeprom_ch->max_power_avg;
 434         ch_info->fat_curr_txpow = eeprom_ch->max_power_avg;
 435         ch_info->fat_min_power = 0;
 436         ch_info->fat_scan_power = eeprom_ch->max_power_avg;
 437         ch_info->fat_flags = eeprom_ch->flags;
 438         ch_info->fat_extension_channel = fat_extension_channel;
 439
 440         return 0;
 441 }
 442
 443 /**
 444  * iwl4965_kw_free - Free the "keep warm" buffer
 445  */
 446 static void iwl4965_kw_free(struct iwl4965_priv *priv)
 447 {
 448         struct pci_dev *dev = priv->pci_dev;
 449         struct iwl4965_kw *kw = &priv->kw;
 450
 451         if (kw->v_addr) {
 452                 pci_free_consistent(dev, kw->size, kw->v_addr, kw->dma_addr);
 453                 memset(kw, 0, sizeof(*kw));
 454         }
 455 }
 456
 457 /**
 458  * iwl4965_txq_ctx_reset - Reset TX queue context
 459  * Destroys all DMA structures and initialise them again
 460  *
 461  * @param priv
 462  * @return error code
 463  */
 464 static int iwl4965_txq_ctx_reset(struct iwl4965_priv *priv)
 465 {
 466         int rc = 0;
 467         int txq_id, slots_num;
 468         unsigned long flags;
 469
 470         iwl4965_kw_free(priv);
 471
 472         /* Free all tx/cmd queues and keep-warm buffer */
 473         iwl4965_hw_txq_ctx_free(priv);
 474
 475         /* Alloc keep-warm buffer */
 476         rc = iwl4965_kw_alloc(priv);
 477         if (rc) {
 478                 IWL_ERROR("Keep Warm allocation failed");
 479                 goto error_kw;
 480         }
 481
 482         spin_lock_irqsave(&priv->lock, flags);
 483
 484         rc = iwl4965_grab_nic_access(priv);
 485         if (unlikely(rc)) {
 486                 IWL_ERROR("TX reset failed");
 487                 spin_unlock_irqrestore(&priv->lock, flags);
 488                 goto error_reset;
 489         }
 490
 491         /* Turn off all Tx DMA channels */
 492         iwl4965_write_prph(priv, KDR_SCD_TXFACT, 0);
 493         iwl4965_release_nic_access(priv);
 494         spin_unlock_irqrestore(&priv->lock, flags);
 495
 496         /* Tell 4965 where to find the keep-warm buffer */
 497         rc = iwl4965_kw_init(priv);
 498         if (rc) {
 499                 IWL_ERROR("kw_init failed\n");
 500                 goto error_reset;
 501         }
 502
 503         /* Alloc and init all (default 16) Tx queues,
 504          * including the command queue (#4) */
 505         for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++) {
 506                 slots_num = (txq_id == IWL_CMD_QUEUE_NUM) ?
 507                                         TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS;
 508                 rc = iwl4965_tx_queue_init(priv, &priv->txq[txq_id], slots_num,
 509                                        txq_id);
 510                 if (rc) {
 511                         IWL_ERROR("Tx %d queue init failed\n", txq_id);
 512                         goto error;
 513                 }
 514         }
 515
 516         return rc;
 517
 518  error:
 519         iwl4965_hw_txq_ctx_free(priv);
 520  error_reset:
 521         iwl4965_kw_free(priv);
 522  error_kw:
 523         return rc;
 524 }
 525
 526 int iwl4965_hw_nic_init(struct iwl4965_priv *priv)
 527 {
 528         int rc;
 529         unsigned long flags;
 530         struct iwl4965_rx_queue *rxq = &priv->rxq;
 531         u8 rev_id;
 532         u32 val;
 533         u8 val_link;
 534
 535         iwl4965_power_init_handle(priv);
 536
 537         /* nic_init */
 538         spin_lock_irqsave(&priv->lock, flags);
 539
 540         iwl4965_set_bit(priv, CSR_GIO_CHICKEN_BITS,
 541                     CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
 542
 543         iwl4965_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 544         rc = iwl4965_poll_bit(priv, CSR_GP_CNTRL,
 545                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
 546                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
 547         if (rc < 0) {
 548                 spin_unlock_irqrestore(&priv->lock, flags);
 549                 IWL_DEBUG_INFO("Failed to init the card\n");
 550                 return rc;
 551         }
 552
 553         rc = iwl4965_grab_nic_access(priv);
 554         if (rc) {
 555                 spin_unlock_irqrestore(&priv->lock, flags);
 556                 return rc;
 557         }
 558
 559         iwl4965_read_prph(priv, APMG_CLK_CTRL_REG);
 560
 561         iwl4965_write_prph(priv, APMG_CLK_CTRL_REG,
 562                                  APMG_CLK_VAL_DMA_CLK_RQT |
 563                                  APMG_CLK_VAL_BSM_CLK_RQT);
 564         iwl4965_read_prph(priv, APMG_CLK_CTRL_REG);
 565
 566         udelay(20);
 567
 568         iwl4965_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
 569                                     APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
 570
 571         iwl4965_release_nic_access(priv);
 572         iwl4965_write32(priv, CSR_INT_COALESCING, 512 / 32);
 573         spin_unlock_irqrestore(&priv->lock, flags);
 574
 575         /* Determine HW type */
 576         rc = pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &rev_id);
 577         if (rc)
 578                 return rc;
 579
 580         IWL_DEBUG_INFO("HW Revision ID = 0x%X\n", rev_id);
 581
 582         iwl4965_nic_set_pwr_src(priv, 1);
 583         spin_lock_irqsave(&priv->lock, flags);
 584
 585         if ((rev_id & 0x80) == 0x80 && (rev_id & 0x7f) < 8) {
 586                 pci_read_config_dword(priv->pci_dev, PCI_REG_WUM8, &val);
 587                 /* Enable No Snoop field */
 588                 pci_write_config_dword(priv->pci_dev, PCI_REG_WUM8,
 589                                        val & ~(1 << 11));
 590         }
 591
 592         spin_unlock_irqrestore(&priv->lock, flags);
 593
 594         if (priv->eeprom.calib_version < EEPROM_TX_POWER_VERSION_NEW) {
 595                 IWL_ERROR("Older EEPROM detected!  Aborting.\n");
 596                 return -EINVAL;
 597         }
 598
 599         pci_read_config_byte(priv->pci_dev, PCI_LINK_CTRL, &val_link);
 600
 601         /* disable L1 entry -- workaround for pre-B1 */
 602         pci_write_config_byte(priv->pci_dev, PCI_LINK_CTRL, val_link & ~0x02);
 603
 604         spin_lock_irqsave(&priv->lock, flags);
 605
 606         /* set CSR_HW_CONFIG_REG for uCode use */
 607
 608         iwl4965_set_bit(priv, CSR_HW_IF_CONFIG_REG,
 609                         CSR49_HW_IF_CONFIG_REG_BIT_4965_R |
 610                         CSR49_HW_IF_CONFIG_REG_BIT_RADIO_SI |
 611                         CSR49_HW_IF_CONFIG_REG_BIT_MAC_SI);
 612
 613         rc = iwl4965_grab_nic_access(priv);
 614         if (rc < 0) {
 615                 spin_unlock_irqrestore(&priv->lock, flags);
 616                 IWL_DEBUG_INFO("Failed to init the card\n");
 617                 return rc;
 618         }
 619
 620         iwl4965_read_prph(priv, APMG_PS_CTRL_REG);
 621         iwl4965_set_bits_prph(priv, APMG_PS_CTRL_REG,
 622                                     APMG_PS_CTRL_VAL_RESET_REQ);
 623         udelay(5);
 624         iwl4965_clear_bits_prph(priv, APMG_PS_CTRL_REG,
 625                                       APMG_PS_CTRL_VAL_RESET_REQ);
 626
 627         iwl4965_release_nic_access(priv);
 628         spin_unlock_irqrestore(&priv->lock, flags);
 629
 630         iwl4965_hw_card_show_info(priv);
 631
 632         /* end nic_init */
 633
 634         /* Allocate the RX queue, or reset if it is already allocated */
 635         if (!rxq->bd) {
 636                 rc = iwl4965_rx_queue_alloc(priv);
 637                 if (rc) {
 638                         IWL_ERROR("Unable to initialize Rx queue\n");
 639                         return -ENOMEM;
 640                 }
 641         } else
 642                 iwl4965_rx_queue_reset(priv, rxq);
 643
 644         iwl4965_rx_replenish(priv);
 645
 646         iwl4965_rx_init(priv, rxq);
 647
 648         spin_lock_irqsave(&priv->lock, flags);
 649
 650         rxq->need_update = 1;
 651         iwl4965_rx_queue_update_write_ptr(priv, rxq);
 652
 653         spin_unlock_irqrestore(&priv->lock, flags);
 654
 655         /* Allocate and init all Tx and Command queues */
 656         rc = iwl4965_txq_ctx_reset(priv);
 657         if (rc)
 658                 return rc;
 659
 660         if (priv->eeprom.sku_cap & EEPROM_SKU_CAP_SW_RF_KILL_ENABLE)
 661                 IWL_DEBUG_RF_KILL("SW RF KILL supported in EEPROM.\n");
 662
 663         if (priv->eeprom.sku_cap & EEPROM_SKU_CAP_HW_RF_KILL_ENABLE)
 664                 IWL_DEBUG_RF_KILL("HW RF KILL supported in EEPROM.\n");
 665
 666         set_bit(STATUS_INIT, &priv->status);
 667
 668         return 0;
 669 }
 670
 671 int iwl4965_hw_nic_stop_master(struct iwl4965_priv *priv)
 672 {
 673         int rc = 0;
 674         u32 reg_val;
 675         unsigned long flags;
 676
 677         spin_lock_irqsave(&priv->lock, flags);
 678
 679         /* set stop master bit */
 680         iwl4965_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
 681
 682         reg_val = iwl4965_read32(priv, CSR_GP_CNTRL);
 683
 684         if (CSR_GP_CNTRL_REG_FLAG_MAC_POWER_SAVE ==
 685             (reg_val & CSR_GP_CNTRL_REG_MSK_POWER_SAVE_TYPE))
 686                 IWL_DEBUG_INFO("Card in power save, master is already "
 687                                "stopped\n");
 688         else {
 689                 rc = iwl4965_poll_bit(priv, CSR_RESET,
 690                                   CSR_RESET_REG_FLAG_MASTER_DISABLED,
 691                                   CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
 692                 if (rc < 0) {
 693                         spin_unlock_irqrestore(&priv->lock, flags);
 694                         return rc;
 695                 }
 696         }
 697
 698         spin_unlock_irqrestore(&priv->lock, flags);
 699         IWL_DEBUG_INFO("stop master\n");
 700
 701         return rc;
 702 }
 703
 704 /**
 705  * iwl4965_hw_txq_ctx_stop - Stop all Tx DMA channels, free Tx queue memory
 706  */
 707 void iwl4965_hw_txq_ctx_stop(struct iwl4965_priv *priv)
 708 {
 709
 710         int txq_id;
 711         unsigned long flags;
 712
 713         /* Stop each Tx DMA channel, and wait for it to be idle */
 714         for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++) {
 715                 spin_lock_irqsave(&priv->lock, flags);
 716                 if (iwl4965_grab_nic_access(priv)) {
 717                         spin_unlock_irqrestore(&priv->lock, flags);
 718                         continue;
 719                 }
 720
 721                 iwl4965_write_direct32(priv,
 722                                      IWL_FH_TCSR_CHNL_TX_CONFIG_REG(txq_id),
 723                                      0x0);
 724                 iwl4965_poll_direct_bit(priv, IWL_FH_TSSR_TX_STATUS_REG,
 725                                         IWL_FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE
 726                                         (txq_id), 200);
 727                 iwl4965_release_nic_access(priv);
 728                 spin_unlock_irqrestore(&priv->lock, flags);
 729         }
 730
 731         /* Deallocate memory for all Tx queues */
 732         iwl4965_hw_txq_ctx_free(priv);
 733 }
 734
 735 int iwl4965_hw_nic_reset(struct iwl4965_priv *priv)
 736 {
 737         int rc = 0;
 738         unsigned long flags;
 739
 740         iwl4965_hw_nic_stop_master(priv);
 741
 742         spin_lock_irqsave(&priv->lock, flags);
 743
 744         iwl4965_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
 745
 746         udelay(10);
 747
 748         iwl4965_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 749         rc = iwl4965_poll_bit(priv, CSR_RESET,
 750                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
 751                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25);
 752
 753         udelay(10);
 754
 755         rc = iwl4965_grab_nic_access(priv);
 756         if (!rc) {
 757                 iwl4965_write_prph(priv, APMG_CLK_EN_REG,
 758                                          APMG_CLK_VAL_DMA_CLK_RQT |
 759                                          APMG_CLK_VAL_BSM_CLK_RQT);
 760
 761                 udelay(10);
 762
 763                 iwl4965_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
 764                                 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
 765
 766                 iwl4965_release_nic_access(priv);
 767         }
 768
 769         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
 770         wake_up_interruptible(&priv->wait_command_queue);
 771
 772         spin_unlock_irqrestore(&priv->lock, flags);
 773
 774         return rc;
 775
 776 }
 777
 778 #define REG_RECALIB_PERIOD (60)
 779
 780 /**
 781  * iwl4965_bg_statistics_periodic - Timer callback to queue statistics
 782  *
 783  * This callback is provided in order to queue the statistics_work
 784  * in work_queue context (v. softirq)
 785  *
 786  * This timer function is continually reset to execute within
 787  * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
 788  * was received.  We need to ensure we receive the statistics in order
 789  * to update the temperature used for calibrating the TXPOWER.  However,
 790  * we can't send the statistics command from softirq context (which
 791  * is the context which timers run at) so we have to queue off the
 792  * statistics_work to actually send the command to the hardware.
 793  */
 794 static void iwl4965_bg_statistics_periodic(unsigned long data)
 795 {
 796         struct iwl4965_priv *priv = (struct iwl4965_priv *)data;
 797
 798         queue_work(priv->workqueue, &priv->statistics_work);
 799 }
 800
 801 /**
 802  * iwl4965_bg_statistics_work - Send the statistics request to the hardware.
 803  *
 804  * This is queued by iwl4965_bg_statistics_periodic.
 805  */
 806 static void iwl4965_bg_statistics_work(struct work_struct *work)
 807 {
 808         struct iwl4965_priv *priv = container_of(work, struct iwl4965_priv,
 809                                              statistics_work);
 810
 811         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 812                 return;
 813
 814         mutex_lock(&priv->mutex);
 815         iwl4965_send_statistics_request(priv);
 816         mutex_unlock(&priv->mutex);
 817 }
 818
 819 #define CT_LIMIT_CONST          259
 820 #define TM_CT_KILL_THRESHOLD    110
 821
 822 void iwl4965_rf_kill_ct_config(struct iwl4965_priv *priv)
 823 {
 824         struct iwl4965_ct_kill_config cmd;
 825         u32 R1, R2, R3;
 826         u32 temp_th;
 827         u32 crit_temperature;
 828         unsigned long flags;
 829         int rc = 0;
 830
 831         spin_lock_irqsave(&priv->lock, flags);
 832         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_CLR,
 833                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
 834         spin_unlock_irqrestore(&priv->lock, flags);
 835
 836         if (priv->statistics.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK) {
 837                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[1]);
 838                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[1]);
 839                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[1]);
 840         } else {
 841                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[0]);
 842                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[0]);
 843                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[0]);
 844         }
 845
 846         temp_th = CELSIUS_TO_KELVIN(TM_CT_KILL_THRESHOLD);
 847
 848         crit_temperature = ((temp_th * (R3-R1))/CT_LIMIT_CONST) + R2;
 849         cmd.critical_temperature_R =  cpu_to_le32(crit_temperature);
 850         rc = iwl4965_send_cmd_pdu(priv,
 851                               REPLY_CT_KILL_CONFIG_CMD, sizeof(cmd), &cmd);
 852         if (rc)
 853                 IWL_ERROR("REPLY_CT_KILL_CONFIG_CMD failed\n");
 854         else
 855                 IWL_DEBUG_INFO("REPLY_CT_KILL_CONFIG_CMD succeeded\n");
 856 }
 857
 858 #ifdef CONFIG_IWL4965_SENSITIVITY
 859
 860 /* "false alarms" are signals that our DSP tries to lock onto,
 861  *   but then determines that they are either noise, or transmissions
 862  *   from a distant wireless network (also "noise", really) that get
 863  *   "stepped on" by stronger transmissions within our own network.
 864  * This algorithm attempts to set a sensitivity level that is high
 865  *   enough to receive all of our own network traffic, but not so
 866  *   high that our DSP gets too busy trying to lock onto non-network
 867  *   activity/noise. */
 868 static int iwl4965_sens_energy_cck(struct iwl4965_priv *priv,
 869                                    u32 norm_fa,
 870                                    u32 rx_enable_time,
 871                                    struct statistics_general_data *rx_info)
 872 {
 873         u32 max_nrg_cck = 0;
 874         int i = 0;
 875         u8 max_silence_rssi = 0;
 876         u32 silence_ref = 0;
 877         u8 silence_rssi_a = 0;
 878         u8 silence_rssi_b = 0;
 879         u8 silence_rssi_c = 0;
 880         u32 val;
 881
 882         /* "false_alarms" values below are cross-multiplications to assess the
 883          *   numbers of false alarms within the measured period of actual Rx
 884          *   (Rx is off when we're txing), vs the min/max expected false alarms
 885          *   (some should be expected if rx is sensitive enough) in a
 886          *   hypothetical listening period of 200 time units (TU), 204.8 msec:
 887          *
 888          * MIN_FA/fixed-time < false_alarms/actual-rx-time < MAX_FA/beacon-time
 889          *
 890          * */
 891         u32 false_alarms = norm_fa * 200 * 1024;
 892         u32 max_false_alarms = MAX_FA_CCK * rx_enable_time;
 893         u32 min_false_alarms = MIN_FA_CCK * rx_enable_time;
 894         struct iwl4965_sensitivity_data *data = NULL;
 895
 896         data = &(priv->sensitivity_data);
 897
 898         data->nrg_auto_corr_silence_diff = 0;
 899
 900         /* Find max silence rssi among all 3 receivers.
 901          * This is background noise, which may include transmissions from other
 902          *    networks, measured during silence before our network's beacon */
 903         silence_rssi_a = (u8)((rx_info->beacon_silence_rssi_a &
 904                             ALL_BAND_FILTER) >> 8);
 905         silence_rssi_b = (u8)((rx_info->beacon_silence_rssi_b &
 906                             ALL_BAND_FILTER) >> 8);
 907         silence_rssi_c = (u8)((rx_info->beacon_silence_rssi_c &
 908                             ALL_BAND_FILTER) >> 8);
 909
 910         val = max(silence_rssi_b, silence_rssi_c);
 911         max_silence_rssi = max(silence_rssi_a, (u8) val);
 912
 913         /* Store silence rssi in 20-beacon history table */
 914         data->nrg_silence_rssi[data->nrg_silence_idx] = max_silence_rssi;
 915         data->nrg_silence_idx++;
 916         if (data->nrg_silence_idx >= NRG_NUM_PREV_STAT_L)
 917                 data->nrg_silence_idx = 0;
 918
 919         /* Find max silence rssi across 20 beacon history */
 920         for (i = 0; i < NRG_NUM_PREV_STAT_L; i++) {
 921                 val = data->nrg_silence_rssi[i];
 922                 silence_ref = max(silence_ref, val);
 923         }
 924         IWL_DEBUG_CALIB("silence a %u, b %u, c %u, 20-bcn max %u\n",
 925                         silence_rssi_a, silence_rssi_b, silence_rssi_c,
 926                         silence_ref);
 927
 928         /* Find max rx energy (min value!) among all 3 receivers,
 929          *   measured during beacon frame.
 930          * Save it in 10-beacon history table. */
 931         i = data->nrg_energy_idx;
 932         val = min(rx_info->beacon_energy_b, rx_info->beacon_energy_c);
 933         data->nrg_value[i] = min(rx_info->beacon_energy_a, val);
 934
 935         data->nrg_energy_idx++;
 936         if (data->nrg_energy_idx >= 10)
 937                 data->nrg_energy_idx = 0;
 938
 939         /* Find min rx energy (max value) across 10 beacon history.
 940          * This is the minimum signal level that we want to receive well.
 941          * Add backoff (margin so we don't miss slightly lower energy frames).
 942          * This establishes an upper bound (min value) for energy threshold. */
 943         max_nrg_cck = data->nrg_value[0];
 944         for (i = 1; i < 10; i++)
 945                 max_nrg_cck = (u32) max(max_nrg_cck, (data->nrg_value[i]));
 946         max_nrg_cck += 6;
 947
 948         IWL_DEBUG_CALIB("rx energy a %u, b %u, c %u, 10-bcn max/min %u\n",
 949                         rx_info->beacon_energy_a, rx_info->beacon_energy_b,
 950                         rx_info->beacon_energy_c, max_nrg_cck - 6);
 951
 952         /* Count number of consecutive beacons with fewer-than-desired
 953          *   false alarms. */
 954         if (false_alarms < min_false_alarms)
 955                 data->num_in_cck_no_fa++;
 956         else
 957                 data->num_in_cck_no_fa = 0;
 958         IWL_DEBUG_CALIB("consecutive bcns with few false alarms = %u\n",
 959                         data->num_in_cck_no_fa);
 960
 961         /* If we got too many false alarms this time, reduce sensitivity */
 962         if (false_alarms > max_false_alarms) {
 963                 IWL_DEBUG_CALIB("norm FA %u > max FA %u\n",
 964                              false_alarms, max_false_alarms);
 965                 IWL_DEBUG_CALIB("... reducing sensitivity\n");
 966                 data->nrg_curr_state = IWL_FA_TOO_MANY;
 967
 968                 if (data->auto_corr_cck > AUTO_CORR_MAX_TH_CCK) {
 969                         /* Store for "fewer than desired" on later beacon */
 970                         data->nrg_silence_ref = silence_ref;
 971
 972                         /* increase energy threshold (reduce nrg value)
 973                          *   to decrease sensitivity */
 974                         if (data->nrg_th_cck > (NRG_MAX_CCK + NRG_STEP_CCK))
 975                                 data->nrg_th_cck = data->nrg_th_cck
 976                                                          - NRG_STEP_CCK;
 977                 }
 978
 979                 /* increase auto_corr values to decrease sensitivity */
 980                 if (data->auto_corr_cck < AUTO_CORR_MAX_TH_CCK)
 981                         data->auto_corr_cck = AUTO_CORR_MAX_TH_CCK + 1;
 982                 else {
 983                         val = data->auto_corr_cck + AUTO_CORR_STEP_CCK;
 984                         data->auto_corr_cck = min((u32)AUTO_CORR_MAX_CCK, val);
 985                 }
 986                 val = data->auto_corr_cck_mrc + AUTO_CORR_STEP_CCK;
 987                 data->auto_corr_cck_mrc = min((u32)AUTO_CORR_MAX_CCK_MRC, val);
 988
 989         /* Else if we got fewer than desired, increase sensitivity */
 990         } else if (false_alarms < min_false_alarms) {
 991                 data->nrg_curr_state = IWL_FA_TOO_FEW;
 992
 993                 /* Compare silence level with silence level for most recent
 994                  *   healthy number or too many false alarms */
 995                 data->nrg_auto_corr_silence_diff = (s32)data->nrg_silence_ref -
 996                                                    (s32)silence_ref;
 997
 998                 IWL_DEBUG_CALIB("norm FA %u < min FA %u, silence diff %d\n",
 999                          false_alarms, min_false_alarms,
1000                          data->nrg_auto_corr_silence_diff);
1001
1002                 /* Increase value to increase sensitivity, but only if:
1003                  * 1a) previous beacon did *not* have *too many* false alarms
1004                  * 1b) AND there's a significant difference in Rx levels
1005                  *      from a previous beacon with too many, or healthy # FAs
1006                  * OR 2) We've seen a lot of beacons (100) with too few
1007                  *       false alarms */
1008                 if ((data->nrg_prev_state != IWL_FA_TOO_MANY) &&
1009                         ((data->nrg_auto_corr_silence_diff > NRG_DIFF) ||
1010                         (data->num_in_cck_no_fa > MAX_NUMBER_CCK_NO_FA))) {
1011
1012                         IWL_DEBUG_CALIB("... increasing sensitivity\n");
1013                         /* Increase nrg value to increase sensitivity */
1014                         val = data->nrg_th_cck + NRG_STEP_CCK;
1015                         data->nrg_th_cck = min((u32)NRG_MIN_CCK, val);
1016
1017                         /* Decrease auto_corr values to increase sensitivity */
1018                         val = data->auto_corr_cck - AUTO_CORR_STEP_CCK;
1019                         data->auto_corr_cck = max((u32)AUTO_CORR_MIN_CCK, val);
1020
1021                         val = data->auto_corr_cck_mrc - AUTO_CORR_STEP_CCK;
1022                         data->auto_corr_cck_mrc =
1023                                          max((u32)AUTO_CORR_MIN_CCK_MRC, val);
1024
1025                 } else
1026                         IWL_DEBUG_CALIB("... but not changing sensitivity\n");
1027
1028         /* Else we got a healthy number of false alarms, keep status quo */
1029         } else {
1030                 IWL_DEBUG_CALIB(" FA in safe zone\n");
1031                 data->nrg_curr_state = IWL_FA_GOOD_RANGE;
1032
1033                 /* Store for use in "fewer than desired" with later beacon */
1034                 data->nrg_silence_ref = silence_ref;
1035
1036                 /* If previous beacon had too many false alarms,
1037                  *   give it some extra margin by reducing sensitivity again
1038                  *   (but don't go below measured energy of desired Rx) */
1039                 if (IWL_FA_TOO_MANY == data->nrg_prev_state) {
1040                         IWL_DEBUG_CALIB("... increasing margin\n");
1041                         data->nrg_th_cck -= NRG_MARGIN;
1042                 }
1043         }
1044
1045         /* Make sure the energy threshold does not go above the measured
1046          * energy of the desired Rx signals (reduced by backoff margin),
1047          * or else we might start missing Rx frames.
1048          * Lower value is higher energy, so we use max()!
1049          */
1050         data->nrg_th_cck = max(max_nrg_cck, data->nrg_th_cck);
1051         IWL_DEBUG_CALIB("new nrg_th_cck %u\n", data->nrg_th_cck);
1052
1053         data->nrg_prev_state = data->nrg_curr_state;
1054
1055         return 0;
1056 }
1057
1058
1059 static int iwl4965_sens_auto_corr_ofdm(struct iwl4965_priv *priv,
1060                                        u32 norm_fa,
1061                                        u32 rx_enable_time)
1062 {
1063         u32 val;
1064         u32 false_alarms = norm_fa * 200 * 1024;
1065         u32 max_false_alarms = MAX_FA_OFDM * rx_enable_time;
1066         u32 min_false_alarms = MIN_FA_OFDM * rx_enable_time;
1067         struct iwl4965_sensitivity_data *data = NULL;
1068
1069         data = &(priv->sensitivity_data);
1070
1071         /* If we got too many false alarms this time, reduce sensitivity */
1072         if (false_alarms > max_false_alarms) {
1073
1074                 IWL_DEBUG_CALIB("norm FA %u > max FA %u)\n",
1075                              false_alarms, max_false_alarms);
1076
1077                 val = data->auto_corr_ofdm + AUTO_CORR_STEP_OFDM;
1078                 data->auto_corr_ofdm =
1079                                 min((u32)AUTO_CORR_MAX_OFDM, val);
1080
1081                 val = data->auto_corr_ofdm_mrc + AUTO_CORR_STEP_OFDM;
1082                 data->auto_corr_ofdm_mrc =
1083                                 min((u32)AUTO_CORR_MAX_OFDM_MRC, val);
1084
1085                 val = data->auto_corr_ofdm_x1 + AUTO_CORR_STEP_OFDM;
1086                 data->auto_corr_ofdm_x1 =
1087                                 min((u32)AUTO_CORR_MAX_OFDM_X1, val);
1088
1089                 val = data->auto_corr_ofdm_mrc_x1 + AUTO_CORR_STEP_OFDM;
1090                 data->auto_corr_ofdm_mrc_x1 =
1091                                 min((u32)AUTO_CORR_MAX_OFDM_MRC_X1, val);
1092         }
1093
1094         /* Else if we got fewer than desired, increase sensitivity */
1095         else if (false_alarms < min_false_alarms) {
1096
1097                 IWL_DEBUG_CALIB("norm FA %u < min FA %u\n",
1098                              false_alarms, min_false_alarms);
1099
1100                 val = data->auto_corr_ofdm - AUTO_CORR_STEP_OFDM;
1101                 data->auto_corr_ofdm =
1102                                 max((u32)AUTO_CORR_MIN_OFDM, val);
1103
1104                 val = data->auto_corr_ofdm_mrc - AUTO_CORR_STEP_OFDM;
1105                 data->auto_corr_ofdm_mrc =
1106                                 max((u32)AUTO_CORR_MIN_OFDM_MRC, val);
1107
1108                 val = data->auto_corr_ofdm_x1 - AUTO_CORR_STEP_OFDM;
1109                 data->auto_corr_ofdm_x1 =
1110                                 max((u32)AUTO_CORR_MIN_OFDM_X1, val);
1111
1112                 val = data->auto_corr_ofdm_mrc_x1 - AUTO_CORR_STEP_OFDM;
1113                 data->auto_corr_ofdm_mrc_x1 =
1114                                 max((u32)AUTO_CORR_MIN_OFDM_MRC_X1, val);
1115         }
1116
1117         else
1118                 IWL_DEBUG_CALIB("min FA %u < norm FA %u < max FA %u OK\n",
1119                          min_false_alarms, false_alarms, max_false_alarms);
1120
1121         return 0;
1122 }
1123
1124 static int iwl4965_sensitivity_callback(struct iwl4965_priv *priv,
1125                                     struct iwl4965_cmd *cmd, struct sk_buff *skb)
1126 {
1127         /* We didn't cache the SKB; let the caller free it */
1128         return 1;
1129 }
1130
1131 /* Prepare a SENSITIVITY_CMD, send to uCode if values have changed */
1132 static int iwl4965_sensitivity_write(struct iwl4965_priv *priv, u8 flags)
1133 {
1134         int rc = 0;
1135         struct iwl4965_sensitivity_cmd cmd ;
1136         struct iwl4965_sensitivity_data *data = NULL;
1137         struct iwl4965_host_cmd cmd_out = {
1138                 .id = SENSITIVITY_CMD,
1139                 .len = sizeof(struct iwl4965_sensitivity_cmd),
1140                 .meta.flags = flags,
1141                 .data = &cmd,
1142         };
1143
1144         data = &(priv->sensitivity_data);
1145
1146         memset(&cmd, 0, sizeof(cmd));
1147
1148         cmd.table[HD_AUTO_CORR32_X4_TH_ADD_MIN_INDEX] =
1149                                 cpu_to_le16((u16)data->auto_corr_ofdm);
1150         cmd.table[HD_AUTO_CORR32_X4_TH_ADD_MIN_MRC_INDEX] =
1151                                 cpu_to_le16((u16)data->auto_corr_ofdm_mrc);
1152         cmd.table[HD_AUTO_CORR32_X1_TH_ADD_MIN_INDEX] =
1153                                 cpu_to_le16((u16)data->auto_corr_ofdm_x1);
1154         cmd.table[HD_AUTO_CORR32_X1_TH_ADD_MIN_MRC_INDEX] =
1155                                 cpu_to_le16((u16)data->auto_corr_ofdm_mrc_x1);
1156
1157         cmd.table[HD_AUTO_CORR40_X4_TH_ADD_MIN_INDEX] =
1158                                 cpu_to_le16((u16)data->auto_corr_cck);
1159         cmd.table[HD_AUTO_CORR40_X4_TH_ADD_MIN_MRC_INDEX] =
1160                                 cpu_to_le16((u16)data->auto_corr_cck_mrc);
1161
1162         cmd.table[HD_MIN_ENERGY_CCK_DET_INDEX] =
1163                                 cpu_to_le16((u16)data->nrg_th_cck);
1164         cmd.table[HD_MIN_ENERGY_OFDM_DET_INDEX] =
1165                                 cpu_to_le16((u16)data->nrg_th_ofdm);
1166
1167         cmd.table[HD_BARKER_CORR_TH_ADD_MIN_INDEX] =
1168                                 __constant_cpu_to_le16(190);
1169         cmd.table[HD_BARKER_CORR_TH_ADD_MIN_MRC_INDEX] =
1170                                 __constant_cpu_to_le16(390);
1171         cmd.table[HD_OFDM_ENERGY_TH_IN_INDEX] =
1172                                 __constant_cpu_to_le16(62);
1173
1174         IWL_DEBUG_CALIB("ofdm: ac %u mrc %u x1 %u mrc_x1 %u thresh %u\n",
1175                         data->auto_corr_ofdm, data->auto_corr_ofdm_mrc,
1176                         data->auto_corr_ofdm_x1, data->auto_corr_ofdm_mrc_x1,
1177                         data->nrg_th_ofdm);
1178
1179         IWL_DEBUG_CALIB("cck: ac %u mrc %u thresh %u\n",
1180                         data->auto_corr_cck, data->auto_corr_cck_mrc,
1181                         data->nrg_th_cck);
1182
1183         /* Update uCode's "work" table, and copy it to DSP */
1184         cmd.control = SENSITIVITY_CMD_CONTROL_WORK_TABLE;
1185
1186         if (flags & CMD_ASYNC)
1187                 cmd_out.meta.u.callback = iwl4965_sensitivity_callback;
1188
1189         /* Don't send command to uCode if nothing has changed */
1190         if (!memcmp(&cmd.table[0], &(priv->sensitivity_tbl[0]),
1191                     sizeof(u16)*HD_TABLE_SIZE)) {
1192                 IWL_DEBUG_CALIB("No change in SENSITIVITY_CMD\n");
1193                 return 0;
1194         }
1195
1196         /* Copy table for comparison next time */
1197         memcpy(&(priv->sensitivity_tbl[0]), &(cmd.table[0]),
1198                sizeof(u16)*HD_TABLE_SIZE);
1199
1200         rc = iwl4965_send_cmd(priv, &cmd_out);
1201         if (!rc) {
1202                 IWL_DEBUG_CALIB("SENSITIVITY_CMD succeeded\n");
1203                 return rc;
1204         }
1205
1206         return 0;
1207 }
1208
1209 void iwl4965_init_sensitivity(struct iwl4965_priv *priv, u8 flags, u8 force)
1210 {
1211         int rc = 0;
1212         int i;
1213         struct iwl4965_sensitivity_data *data = NULL;
1214
1215         IWL_DEBUG_CALIB("Start iwl4965_init_sensitivity\n");
1216
1217         if (force)
1218                 memset(&(priv->sensitivity_tbl[0]), 0,
1219                         sizeof(u16)*HD_TABLE_SIZE);
1220
1221         /* Clear driver's sensitivity algo data */
1222         data = &(priv->sensitivity_data);
1223         memset(data, 0, sizeof(struct iwl4965_sensitivity_data));
1224
1225         data->num_in_cck_no_fa = 0;
1226         data->nrg_curr_state = IWL_FA_TOO_MANY;
1227         data->nrg_prev_state = IWL_FA_TOO_MANY;
1228         data->nrg_silence_ref = 0;
1229         data->nrg_silence_idx = 0;
1230         data->nrg_energy_idx = 0;
1231
1232         for (i = 0; i < 10; i++)
1233                 data->nrg_value[i] = 0;
1234
1235         for (i = 0; i < NRG_NUM_PREV_STAT_L; i++)
1236                 data->nrg_silence_rssi[i] = 0;
1237
1238         data->auto_corr_ofdm = 90;
1239         data->auto_corr_ofdm_mrc = 170;
1240         data->auto_corr_ofdm_x1  = 105;
1241         data->auto_corr_ofdm_mrc_x1 = 220;
1242         data->auto_corr_cck = AUTO_CORR_CCK_MIN_VAL_DEF;
1243         data->auto_corr_cck_mrc = 200;
1244         data->nrg_th_cck = 100;
1245         data->nrg_th_ofdm = 100;
1246
1247         data->last_bad_plcp_cnt_ofdm = 0;
1248         data->last_fa_cnt_ofdm = 0;
1249         data->last_bad_plcp_cnt_cck = 0;
1250         data->last_fa_cnt_cck = 0;
1251
1252         /* Clear prior Sensitivity command data to force send to uCode */
1253         if (force)
1254                 memset(&(priv->sensitivity_tbl[0]), 0,
1255                     sizeof(u16)*HD_TABLE_SIZE);
1256
1257         rc |= iwl4965_sensitivity_write(priv, flags);
1258         IWL_DEBUG_CALIB("<<return 0x%X\n", rc);
1259
1260         return;
1261 }
1262
1263
1264 /* Reset differential Rx gains in NIC to prepare for chain noise calibration.
1265  * Called after every association, but this runs only once!
1266  *  ... once chain noise is calibrated the first time, it's good forever.  */
1267 void iwl4965_chain_noise_reset(struct iwl4965_priv *priv)
1268 {
1269         struct iwl4965_chain_noise_data *data = NULL;
1270         int rc = 0;
1271
1272         data = &(priv->chain_noise_data);
1273         if ((data->state == IWL_CHAIN_NOISE_ALIVE) && iwl4965_is_associated(priv)) {
1274                 struct iwl4965_calibration_cmd cmd;
1275
1276                 memset(&cmd, 0, sizeof(cmd));
1277                 cmd.opCode = PHY_CALIBRATE_DIFF_GAIN_CMD;
1278                 cmd.diff_gain_a = 0;
1279                 cmd.diff_gain_b = 0;
1280                 cmd.diff_gain_c = 0;
1281                 rc = iwl4965_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
1282                                  sizeof(cmd), &cmd);
1283                 msleep(4);
1284                 data->state = IWL_CHAIN_NOISE_ACCUMULATE;
1285                 IWL_DEBUG_CALIB("Run chain_noise_calibrate\n");
1286         }
1287         return;
1288 }
1289
1290 /*
1291  * Accumulate 20 beacons of signal and noise statistics for each of
1292  *   3 receivers/antennas/rx-chains, then figure out:
1293  * 1)  Which antennas are connected.
1294  * 2)  Differential rx gain settings to balance the 3 receivers.
1295  */
1296 static void iwl4965_noise_calibration(struct iwl4965_priv *priv,
1297                                       struct iwl4965_notif_statistics *stat_resp)
1298 {
1299         struct iwl4965_chain_noise_data *data = NULL;
1300         int rc = 0;
1301
1302         u32 chain_noise_a;
1303         u32 chain_noise_b;
1304         u32 chain_noise_c;
1305         u32 chain_sig_a;
1306         u32 chain_sig_b;
1307         u32 chain_sig_c;
1308         u32 average_sig[NUM_RX_CHAINS] = {INITIALIZATION_VALUE};
1309         u32 average_noise[NUM_RX_CHAINS] = {INITIALIZATION_VALUE};
1310         u32 max_average_sig;
1311         u16 max_average_sig_antenna_i;
1312         u32 min_average_noise = MIN_AVERAGE_NOISE_MAX_VALUE;
1313         u16 min_average_noise_antenna_i = INITIALIZATION_VALUE;
1314         u16 i = 0;
1315         u16 chan_num = INITIALIZATION_VALUE;
1316         u32 band = INITIALIZATION_VALUE;
1317         u32 active_chains = 0;
1318         unsigned long flags;
1319         struct statistics_rx_non_phy *rx_info = &(stat_resp->rx.general);
1320
1321         data = &(priv->chain_noise_data);
1322
1323         /* Accumulate just the first 20 beacons after the first association,
1324          *   then we're done forever. */
1325         if (data->state != IWL_CHAIN_NOISE_ACCUMULATE) {
1326                 if (data->state == IWL_CHAIN_NOISE_ALIVE)
1327                         IWL_DEBUG_CALIB("Wait for noise calib reset\n");
1328                 return;
1329         }
1330
1331         spin_lock_irqsave(&priv->lock, flags);
1332         if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) {
1333                 IWL_DEBUG_CALIB(" << Interference data unavailable\n");
1334                 spin_unlock_irqrestore(&priv->lock, flags);
1335                 return;
1336         }
1337
1338         band = (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) ? 0 : 1;
1339         chan_num = le16_to_cpu(priv->staging_rxon.channel);
1340
1341         /* Make sure we accumulate data for just the associated channel
1342          *   (even if scanning). */
1343         if ((chan_num != (le32_to_cpu(stat_resp->flag) >> 16)) ||
1344             ((STATISTICS_REPLY_FLG_BAND_24G_MSK ==
1345              (stat_resp->flag & STATISTICS_REPLY_FLG_BAND_24G_MSK)) && band)) {
1346                 IWL_DEBUG_CALIB("Stats not from chan=%d, band=%d\n",
1347                                 chan_num, band);
1348                 spin_unlock_irqrestore(&priv->lock, flags);
1349                 return;
1350         }
1351
1352         /* Accumulate beacon statistics values across 20 beacons */
1353         chain_noise_a = le32_to_cpu(rx_info->beacon_silence_rssi_a) &
1354                                 IN_BAND_FILTER;
1355         chain_noise_b = le32_to_cpu(rx_info->beacon_silence_rssi_b) &
1356                                 IN_BAND_FILTER;
1357         chain_noise_c = le32_to_cpu(rx_info->beacon_silence_rssi_c) &
1358                                 IN_BAND_FILTER;
1359
1360         chain_sig_a = le32_to_cpu(rx_info->beacon_rssi_a) & IN_BAND_FILTER;
1361         chain_sig_b = le32_to_cpu(rx_info->beacon_rssi_b) & IN_BAND_FILTER;
1362         chain_sig_c = le32_to_cpu(rx_info->beacon_rssi_c) & IN_BAND_FILTER;
1363
1364         spin_unlock_irqrestore(&priv->lock, flags);
1365
1366         data->beacon_count++;
1367
1368         data->chain_noise_a = (chain_noise_a + data->chain_noise_a);
1369         data->chain_noise_b = (chain_noise_b + data->chain_noise_b);
1370         data->chain_noise_c = (chain_noise_c + data->chain_noise_c);
1371
1372         data->chain_signal_a = (chain_sig_a + data->chain_signal_a);
1373         data->chain_signal_b = (chain_sig_b + data->chain_signal_b);
1374         data->chain_signal_c = (chain_sig_c + data->chain_signal_c);
1375
1376         IWL_DEBUG_CALIB("chan=%d, band=%d, beacon=%d\n", chan_num, band,
1377                         data->beacon_count);
1378         IWL_DEBUG_CALIB("chain_sig: a %d b %d c %d\n",
1379                         chain_sig_a, chain_sig_b, chain_sig_c);
1380         IWL_DEBUG_CALIB("chain_noise: a %d b %d c %d\n",
1381                         chain_noise_a, chain_noise_b, chain_noise_c);
1382
1383         /* If this is the 20th beacon, determine:
1384          * 1)  Disconnected antennas (using signal strengths)
1385          * 2)  Differential gain (using silence noise) to balance receivers */
1386         if (data->beacon_count == CAL_NUM_OF_BEACONS) {
1387
1388                 /* Analyze signal for disconnected antenna */
1389                 average_sig[0] = (data->chain_signal_a) / CAL_NUM_OF_BEACONS;
1390                 average_sig[1] = (data->chain_signal_b) / CAL_NUM_OF_BEACONS;
1391                 average_sig[2] = (data->chain_signal_c) / CAL_NUM_OF_BEACONS;
1392
1393                 if (average_sig[0] >= average_sig[1]) {
1394                         max_average_sig = average_sig[0];
1395                         max_average_sig_antenna_i = 0;
1396                         active_chains = (1 << max_average_sig_antenna_i);
1397                 } else {
1398                         max_average_sig = average_sig[1];
1399                         max_average_sig_antenna_i = 1;
1400                         active_chains = (1 << max_average_sig_antenna_i);
1401                 }
1402
1403                 if (average_sig[2] >= max_average_sig) {
1404                         max_average_sig = average_sig[2];
1405                         max_average_sig_antenna_i = 2;
1406                         active_chains = (1 << max_average_sig_antenna_i);
1407                 }
1408
1409                 IWL_DEBUG_CALIB("average_sig: a %d b %d c %d\n",
1410                              average_sig[0], average_sig[1], average_sig[2]);
1411                 IWL_DEBUG_CALIB("max_average_sig = %d, antenna %d\n",
1412                              max_average_sig, max_average_sig_antenna_i);
1413
1414                 /* Compare signal strengths for all 3 receivers. */
1415                 for (i = 0; i < NUM_RX_CHAINS; i++) {
1416                         if (i != max_average_sig_antenna_i) {
1417                                 s32 rssi_delta = (max_average_sig -
1418                                                   average_sig[i]);
1419
1420                                 /* If signal is very weak, compared with
1421                                  * strongest, mark it as disconnected. */
1422                                 if (rssi_delta > MAXIMUM_ALLOWED_PATHLOSS)
1423                                         data->disconn_array[i] = 1;
1424                                 else
1425                                         active_chains |= (1 << i);
1426                         IWL_DEBUG_CALIB("i = %d  rssiDelta = %d  "
1427                                      "disconn_array[i] = %d\n",
1428                                      i, rssi_delta, data->disconn_array[i]);
1429                         }
1430                 }
1431
1432                 /*If both chains A & B are disconnected -
1433                  * connect B and leave A as is */
1434                 if (data->disconn_array[CHAIN_A] &&
1435                     data->disconn_array[CHAIN_B]) {
1436                         data->disconn_array[CHAIN_B] = 0;
1437                         active_chains |= (1 << CHAIN_B);
1438                         IWL_DEBUG_CALIB("both A & B chains are disconnected! "
1439                                      "W/A - declare B as connected\n");
1440                 }
1441
1442                 IWL_DEBUG_CALIB("active_chains (bitwise) = 0x%x\n",
1443                                 active_chains);
1444
1445                 /* Save for use within RXON, TX, SCAN commands, etc. */
1446                 priv->valid_antenna = active_chains;
1447
1448                 /* Analyze noise for rx balance */
1449                 average_noise[0] = ((data->chain_noise_a)/CAL_NUM_OF_BEACONS);
1450                 average_noise[1] = ((data->chain_noise_b)/CAL_NUM_OF_BEACONS);
1451                 average_noise[2] = ((data->chain_noise_c)/CAL_NUM_OF_BEACONS);
1452
1453                 for (i = 0; i < NUM_RX_CHAINS; i++) {
1454                         if (!(data->disconn_array[i]) &&
1455                            (average_noise[i] <= min_average_noise)) {
1456                                 /* This means that chain i is active and has
1457                                  * lower noise values so far: */
1458                                 min_average_noise = average_noise[i];
1459                                 min_average_noise_antenna_i = i;
1460                         }
1461                 }
1462
1463                 data->delta_gain_code[min_average_noise_antenna_i] = 0;
1464
1465                 IWL_DEBUG_CALIB("average_noise: a %d b %d c %d\n",
1466                                 average_noise[0], average_noise[1],
1467                                 average_noise[2]);
1468
1469                 IWL_DEBUG_CALIB("min_average_noise = %d, antenna %d\n",
1470                                 min_average_noise, min_average_noise_antenna_i);
1471
1472                 for (i = 0; i < NUM_RX_CHAINS; i++) {
1473                         s32 delta_g = 0;
1474
1475                         if (!(data->disconn_array[i]) &&
1476                             (data->delta_gain_code[i] ==
1477                              CHAIN_NOISE_DELTA_GAIN_INIT_VAL)) {
1478                                 delta_g = average_noise[i] - min_average_noise;
1479                                 data->delta_gain_code[i] = (u8)((delta_g *
1480                                                                     10) / 15);
1481                                 if (CHAIN_NOISE_MAX_DELTA_GAIN_CODE <
1482                                    data->delta_gain_code[i])
1483                                         data->delta_gain_code[i] =
1484                                           CHAIN_NOISE_MAX_DELTA_GAIN_CODE;
1485
1486                                 data->delta_gain_code[i] =
1487                                         (data->delta_gain_code[i] | (1 << 2));
1488                         } else
1489                                 data->delta_gain_code[i] = 0;
1490                 }
1491                 IWL_DEBUG_CALIB("delta_gain_codes: a %d b %d c %d\n",
1492                              data->delta_gain_code[0],
1493                              data->delta_gain_code[1],
1494                              data->delta_gain_code[2]);
1495
1496                 /* Differential gain gets sent to uCode only once */
1497                 if (!data->radio_write) {
1498                         struct iwl4965_calibration_cmd cmd;
1499                         data->radio_write = 1;
1500
1501                         memset(&cmd, 0, sizeof(cmd));
1502                         cmd.opCode = PHY_CALIBRATE_DIFF_GAIN_CMD;
1503                         cmd.diff_gain_a = data->delta_gain_code[0];
1504                         cmd.diff_gain_b = data->delta_gain_code[1];
1505                         cmd.diff_gain_c = data->delta_gain_code[2];
1506                         rc = iwl4965_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
1507                                               sizeof(cmd), &cmd);
1508                         if (rc)
1509                                 IWL_DEBUG_CALIB("fail sending cmd "
1510                                              "REPLY_PHY_CALIBRATION_CMD \n");
1511
1512                         /* TODO we might want recalculate
1513                          * rx_chain in rxon cmd */
1514
1515                         /* Mark so we run this algo only once! */
1516                         data->state = IWL_CHAIN_NOISE_CALIBRATED;
1517                 }
1518                 data->chain_noise_a = 0;
1519                 data->chain_noise_b = 0;
1520                 data->chain_noise_c = 0;
1521                 data->chain_signal_a = 0;
1522                 data->chain_signal_b = 0;
1523                 data->chain_signal_c = 0;
1524                 data->beacon_count = 0;
1525         }
1526         return;
1527 }
1528
1529 static void iwl4965_sensitivity_calibration(struct iwl4965_priv *priv,
1530                                             struct iwl4965_notif_statistics *resp)
1531 {
1532         int rc = 0;
1533         u32 rx_enable_time;
1534         u32 fa_cck;
1535         u32 fa_ofdm;
1536         u32 bad_plcp_cck;
1537         u32 bad_plcp_ofdm;
1538         u32 norm_fa_ofdm;
1539         u32 norm_fa_cck;
1540         struct iwl4965_sensitivity_data *data = NULL;
1541         struct statistics_rx_non_phy *rx_info = &(resp->rx.general);
1542         struct statistics_rx *statistics = &(resp->rx);
1543         unsigned long flags;
1544         struct statistics_general_data statis;
1545
1546         data = &(priv->sensitivity_data);
1547
1548         if (!iwl4965_is_associated(priv)) {
1549                 IWL_DEBUG_CALIB("<< - not associated\n");
1550                 return;
1551         }
1552
1553         spin_lock_irqsave(&priv->lock, flags);
1554         if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) {
1555                 IWL_DEBUG_CALIB("<< invalid data.\n");
1556                 spin_unlock_irqrestore(&priv->lock, flags);
1557                 return;
1558         }
1559
1560         /* Extract Statistics: */
1561         rx_enable_time = le32_to_cpu(rx_info->channel_load);
1562         fa_cck = le32_to_cpu(statistics->cck.false_alarm_cnt);
1563         fa_ofdm = le32_to_cpu(statistics->ofdm.false_alarm_cnt);
1564         bad_plcp_cck = le32_to_cpu(statistics->cck.plcp_err);
1565         bad_plcp_ofdm = le32_to_cpu(statistics->ofdm.plcp_err);
1566
1567         statis.beacon_silence_rssi_a =
1568                         le32_to_cpu(statistics->general.beacon_silence_rssi_a);
1569         statis.beacon_silence_rssi_b =
1570                         le32_to_cpu(statistics->general.beacon_silence_rssi_b);
1571         statis.beacon_silence_rssi_c =
1572                         le32_to_cpu(statistics->general.beacon_silence_rssi_c);
1573         statis.beacon_energy_a =
1574                         le32_to_cpu(statistics->general.beacon_energy_a);
1575         statis.beacon_energy_b =
1576                         le32_to_cpu(statistics->general.beacon_energy_b);
1577         statis.beacon_energy_c =
1578                         le32_to_cpu(statistics->general.beacon_energy_c);
1579
1580         spin_unlock_irqrestore(&priv->lock, flags);
1581
1582         IWL_DEBUG_CALIB("rx_enable_time = %u usecs\n", rx_enable_time);
1583
1584         if (!rx_enable_time) {
1585                 IWL_DEBUG_CALIB("<< RX Enable Time == 0! \n");
1586                 return;
1587         }
1588
1589         /* These statistics increase monotonically, and do not reset
1590          *   at each beacon.  Calculate difference from last value, or just
1591          *   use the new statistics value if it has reset or wrapped around. */
1592         if (data->last_bad_plcp_cnt_cck > bad_plcp_cck)
1593                 data->last_bad_plcp_cnt_cck = bad_plcp_cck;
1594         else {
1595                 bad_plcp_cck -= data->last_bad_plcp_cnt_cck;
1596                 data->last_bad_plcp_cnt_cck += bad_plcp_cck;
1597         }
1598
1599         if (data->last_bad_plcp_cnt_ofdm > bad_plcp_ofdm)
1600                 data->last_bad_plcp_cnt_ofdm = bad_plcp_ofdm;
1601         else {
1602                 bad_plcp_ofdm -= data->last_bad_plcp_cnt_ofdm;
1603                 data->last_bad_plcp_cnt_ofdm += bad_plcp_ofdm;
1604         }
1605
1606         if (data->last_fa_cnt_ofdm > fa_ofdm)
1607                 data->last_fa_cnt_ofdm = fa_ofdm;
1608         else {
1609                 fa_ofdm -= data->last_fa_cnt_ofdm;
1610                 data->last_fa_cnt_ofdm += fa_ofdm;
1611         }
1612
1613         if (data->last_fa_cnt_cck > fa_cck)
1614                 data->last_fa_cnt_cck = fa_cck;
1615         else {
1616                 fa_cck -= data->last_fa_cnt_cck;
1617                 data->last_fa_cnt_cck += fa_cck;
1618         }
1619
1620         /* Total aborted signal locks */
1621         norm_fa_ofdm = fa_ofdm + bad_plcp_ofdm;
1622         norm_fa_cck = fa_cck + bad_plcp_cck;
1623
1624         IWL_DEBUG_CALIB("cck: fa %u badp %u  ofdm: fa %u badp %u\n", fa_cck,
1625                         bad_plcp_cck, fa_ofdm, bad_plcp_ofdm);
1626
1627         iwl4965_sens_auto_corr_ofdm(priv, norm_fa_ofdm, rx_enable_time);
1628         iwl4965_sens_energy_cck(priv, norm_fa_cck, rx_enable_time, &statis);
1629         rc |= iwl4965_sensitivity_write(priv, CMD_ASYNC);
1630
1631         return;
1632 }
1633
1634 static void iwl4965_bg_sensitivity_work(struct work_struct *work)
1635 {
1636         struct iwl4965_priv *priv = container_of(work, struct iwl4965_priv,
1637                         sensitivity_work);
1638
1639         mutex_lock(&priv->mutex);
1640
1641         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
1642             test_bit(STATUS_SCANNING, &priv->status)) {
1643                 mutex_unlock(&priv->mutex);
1644                 return;
1645         }
1646
1647         if (priv->start_calib) {
1648                 iwl4965_noise_calibration(priv, &priv->statistics);
1649
1650                 if (priv->sensitivity_data.state ==
1651                                         IWL_SENS_CALIB_NEED_REINIT) {
1652                         iwl4965_init_sensitivity(priv, CMD_ASYNC, 0);
1653                         priv->sensitivity_data.state = IWL_SENS_CALIB_ALLOWED;
1654                 } else
1655                         iwl4965_sensitivity_calibration(priv,
1656                                         &priv->statistics);
1657         }
1658
1659         mutex_unlock(&priv->mutex);
1660         return;
1661 }
1662 #endif /*CONFIG_IWL4965_SENSITIVITY*/
1663
1664 static void iwl4965_bg_txpower_work(struct work_struct *work)
1665 {
1666         struct iwl4965_priv *priv = container_of(work, struct iwl4965_priv,
1667                         txpower_work);
1668
1669         /* If a scan happened to start before we got here
1670          * then just return; the statistics notification will
1671          * kick off another scheduled work to compensate for
1672          * any temperature delta we missed here. */
1673         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
1674             test_bit(STATUS_SCANNING, &priv->status))
1675                 return;
1676
1677         mutex_lock(&priv->mutex);
1678
1679         /* Regardless of if we are assocaited, we must reconfigure the
1680          * TX power since frames can be sent on non-radar channels while
1681          * not associated */
1682         iwl4965_hw_reg_send_txpower(priv);
1683
1684         /* Update last_temperature to keep is_calib_needed from running
1685          * when it isn't needed... */
1686         priv->last_temperature = priv->temperature;
1687
1688         mutex_unlock(&priv->mutex);
1689 }
1690
1691 /*
1692  * Acquire priv->lock before calling this function !
1693  */
1694 static void iwl4965_set_wr_ptrs(struct iwl4965_priv *priv, int txq_id, u32 index)
1695 {
1696         iwl4965_write_direct32(priv, HBUS_TARG_WRPTR,
1697                              (index & 0xff) | (txq_id << 8));
1698         iwl4965_write_prph(priv, KDR_SCD_QUEUE_RDPTR(txq_id), index);
1699 }
1700
1701 /**
1702  * iwl4965_tx_queue_set_status - (optionally) start Tx/Cmd queue
1703  * @tx_fifo_id: Tx DMA/FIFO channel (range 0-7) that the queue will feed
1704  * @scd_retry: (1) Indicates queue will be used in aggregation mode
1705  *
1706  * NOTE:  Acquire priv->lock before calling this function !
1707  */
1708 static void iwl4965_tx_queue_set_status(struct iwl4965_priv *priv,
1709                                         struct iwl4965_tx_queue *txq,
1710                                         int tx_fifo_id, int scd_retry)
1711 {
1712         int txq_id = txq->q.id;
1713
1714         /* Find out whether to activate Tx queue */
1715         int active = test_bit(txq_id, &priv->txq_ctx_active_msk)?1:0;
1716
1717         /* Set up and activate */
1718         iwl4965_write_prph(priv, KDR_SCD_QUEUE_STATUS_BITS(txq_id),
1719                                  (active << SCD_QUEUE_STTS_REG_POS_ACTIVE) |
1720                                  (tx_fifo_id << SCD_QUEUE_STTS_REG_POS_TXF) |
1721                                  (scd_retry << SCD_QUEUE_STTS_REG_POS_WSL) |
1722                                  (scd_retry << SCD_QUEUE_STTS_REG_POS_SCD_ACK) |
1723                                  SCD_QUEUE_STTS_REG_MSK);
1724
1725         txq->sched_retry = scd_retry;
1726
1727         IWL_DEBUG_INFO("%s %s Queue %d on AC %d\n",
1728                        active ? "Activate" : "Deactivate",
1729                        scd_retry ? "BA" : "AC", txq_id, tx_fifo_id);
1730 }
1731
1732 static const u16 default_queue_to_tx_fifo[] = {
1733         IWL_TX_FIFO_AC3,
1734         IWL_TX_FIFO_AC2,
1735         IWL_TX_FIFO_AC1,
1736         IWL_TX_FIFO_AC0,
1737         IWL_CMD_FIFO_NUM,
1738         IWL_TX_FIFO_HCCA_1,
1739         IWL_TX_FIFO_HCCA_2
1740 };
1741
1742 static inline void iwl4965_txq_ctx_activate(struct iwl4965_priv *priv, int txq_id)
1743 {
1744         set_bit(txq_id, &priv->txq_ctx_active_msk);
1745 }
1746
1747 static inline void iwl4965_txq_ctx_deactivate(struct iwl4965_priv *priv, int txq_id)
1748 {
1749         clear_bit(txq_id, &priv->txq_ctx_active_msk);
1750 }
1751
1752 int iwl4965_alive_notify(struct iwl4965_priv *priv)
1753 {
1754         u32 a;
1755         int i = 0;
1756         unsigned long flags;
1757         int rc;
1758
1759         spin_lock_irqsave(&priv->lock, flags);
1760
1761 #ifdef CONFIG_IWL4965_SENSITIVITY
1762         memset(&(priv->sensitivity_data), 0,
1763                sizeof(struct iwl4965_sensitivity_data));
1764         memset(&(priv->chain_noise_data), 0,
1765                sizeof(struct iwl4965_chain_noise_data));
1766         for (i = 0; i < NUM_RX_CHAINS; i++)
1767                 priv->chain_noise_data.delta_gain_code[i] =
1768                                 CHAIN_NOISE_DELTA_GAIN_INIT_VAL;
1769 #endif /* CONFIG_IWL4965_SENSITIVITY*/
1770         rc = iwl4965_grab_nic_access(priv);
1771         if (rc) {
1772                 spin_unlock_irqrestore(&priv->lock, flags);
1773                 return rc;
1774         }
1775
1776         /* Clear 4965's internal Tx Scheduler data base */
1777         priv->scd_base_addr = iwl4965_read_prph(priv, KDR_SCD_SRAM_BASE_ADDR);
1778         a = priv->scd_base_addr + SCD_CONTEXT_DATA_OFFSET;
1779         for (; a < priv->scd_base_addr + SCD_TX_STTS_BITMAP_OFFSET; a += 4)
1780                 iwl4965_write_targ_mem(priv, a, 0);
1781         for (; a < priv->scd_base_addr + SCD_TRANSLATE_TBL_OFFSET; a += 4)
1782                 iwl4965_write_targ_mem(priv, a, 0);
1783         for (; a < sizeof(u16) * priv->hw_setting.max_txq_num; a += 4)
1784                 iwl4965_write_targ_mem(priv, a, 0);
1785
1786         /* Tel 4965 where to find Tx byte count tables */
1787         iwl4965_write_prph(priv, KDR_SCD_DRAM_BASE_ADDR,
1788                 (priv->hw_setting.shared_phys +
1789                  offsetof(struct iwl4965_shared, queues_byte_cnt_tbls)) >> 10);
1790
1791         /* Disable chain mode for all queues */
1792         iwl4965_write_prph(priv, KDR_SCD_QUEUECHAIN_SEL, 0);
1793
1794         /* Initialize each Tx queue (including the command queue) */
1795         for (i = 0; i < priv->hw_setting.max_txq_num; i++) {
1796
1797                 /* TFD circular buffer read/write indexes */
1798                 iwl4965_write_prph(priv, KDR_SCD_QUEUE_RDPTR(i), 0);
1799                 iwl4965_write_direct32(priv, HBUS_TARG_WRPTR, 0 | (i << 8));
1800
1801                 /* Max Tx Window size for Scheduler-ACK mode */
1802                 iwl4965_write_targ_mem(priv, priv->scd_base_addr +
1803                                         SCD_CONTEXT_QUEUE_OFFSET(i),
1804                                         (SCD_WIN_SIZE <<
1805                                         SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
1806                                         SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
1807
1808                 /* Frame limit */
1809                 iwl4965_write_targ_mem(priv, priv->scd_base_addr +
1810                                         SCD_CONTEXT_QUEUE_OFFSET(i) +
1811                                         sizeof(u32),
1812                                         (SCD_FRAME_LIMIT <<
1813                                         SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) &
1814                                         SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
1815
1816         }
1817         iwl4965_write_prph(priv, KDR_SCD_INTERRUPT_MASK,
1818                                  (1 << priv->hw_setting.max_txq_num) - 1);
1819
1820         /* Activate all Tx DMA/FIFO channels */
1821         iwl4965_write_prph(priv, KDR_SCD_TXFACT,
1822                                  SCD_TXFACT_REG_TXFIFO_MASK(0, 7));
1823
1824         iwl4965_set_wr_ptrs(priv, IWL_CMD_QUEUE_NUM, 0);
1825
1826         /* Map each Tx/cmd queue to its corresponding fifo */
1827         for (i = 0; i < ARRAY_SIZE(default_queue_to_tx_fifo); i++) {
1828                 int ac = default_queue_to_tx_fifo[i];
1829                 iwl4965_txq_ctx_activate(priv, i);
1830                 iwl4965_tx_queue_set_status(priv, &priv->txq[i], ac, 0);
1831         }
1832
1833         iwl4965_release_nic_access(priv);
1834         spin_unlock_irqrestore(&priv->lock, flags);
1835
1836         return 0;
1837 }
1838
1839 /**
1840  * iwl4965_hw_set_hw_setting
1841  *
1842  * Called when initializing driver
1843  */
1844 int iwl4965_hw_set_hw_setting(struct iwl4965_priv *priv)
1845 {
1846         /* Allocate area for Tx byte count tables and Rx queue status */
1847         priv->hw_setting.shared_virt =
1848             pci_alloc_consistent(priv->pci_dev,
1849                                  sizeof(struct iwl4965_shared),
1850                                  &priv->hw_setting.shared_phys);
1851
1852         if (!priv->hw_setting.shared_virt)
1853                 return -1;
1854
1855         memset(priv->hw_setting.shared_virt, 0, sizeof(struct iwl4965_shared));
1856
1857         priv->hw_setting.max_txq_num = iwl4965_param_queues_num;
1858         priv->hw_setting.tx_cmd_len = sizeof(struct iwl4965_tx_cmd);
1859         priv->hw_setting.max_rxq_size = RX_QUEUE_SIZE;
1860         priv->hw_setting.max_rxq_log = RX_QUEUE_SIZE_LOG;
1861         if (iwl4965_param_amsdu_size_8K)
1862                 priv->hw_setting.rx_buf_size = IWL_RX_BUF_SIZE_8K;
1863         else
1864                 priv->hw_setting.rx_buf_size = IWL_RX_BUF_SIZE_4K;
1865         priv->hw_setting.max_pkt_size = priv->hw_setting.rx_buf_size - 256;
1866         priv->hw_setting.max_stations = IWL4965_STATION_COUNT;
1867         priv->hw_setting.bcast_sta_id = IWL4965_BROADCAST_ID;
1868
1869         priv->hw_setting.tx_ant_num = 2;
1870
1871         return 0;
1872 }
1873
1874 /**
1875  * iwl4965_hw_txq_ctx_free - Free TXQ Context
1876  *
1877  * Destroy all TX DMA queues and structures
1878  */
1879 void iwl4965_hw_txq_ctx_free(struct iwl4965_priv *priv)
1880 {
1881         int txq_id;
1882
1883         /* Tx queues */
1884         for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++)
1885                 iwl4965_tx_queue_free(priv, &priv->txq[txq_id]);
1886
1887         /* Keep-warm buffer */
1888         iwl4965_kw_free(priv);
1889 }
1890
1891 /**
1892  * iwl4965_hw_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr]
1893  *
1894  * Does NOT advance any TFD circular buffer read/write indexes
1895  * Does NOT free the TFD itself (which is within circular buffer)
1896  */
1897 int iwl4965_hw_txq_free_tfd(struct iwl4965_priv *priv, struct iwl4965_tx_queue *txq)
1898 {
1899         struct iwl4965_tfd_frame *bd_tmp = (struct iwl4965_tfd_frame *)&txq->bd[0];
1900         struct iwl4965_tfd_frame *bd = &bd_tmp[txq->q.read_ptr];
1901         struct pci_dev *dev = priv->pci_dev;
1902         int i;
1903         int counter = 0;
1904         int index, is_odd;
1905
1906         /* Host command buffers stay mapped in memory, nothing to clean */
1907         if (txq->q.id == IWL_CMD_QUEUE_NUM)
1908                 return 0;
1909
1910         /* Sanity check on number of chunks */
1911         counter = IWL_GET_BITS(*bd, num_tbs);
1912         if (counter > MAX_NUM_OF_TBS) {
1913                 IWL_ERROR("Too many chunks: %i\n", counter);
1914                 /* @todo issue fatal error, it is quite serious situation */
1915                 return 0;
1916         }
1917
1918         /* Unmap chunks, if any.
1919          * TFD info for odd chunks is different format than for even chunks. */
1920         for (i = 0; i < counter; i++) {
1921                 index = i / 2;
1922                 is_odd = i & 0x1;
1923
1924                 if (is_odd)
1925                         pci_unmap_single(
1926                                 dev,
1927                                 IWL_GET_BITS(bd->pa[index], tb2_addr_lo16) |
1928                                 (IWL_GET_BITS(bd->pa[index],
1929                                               tb2_addr_hi20) << 16),
1930                                 IWL_GET_BITS(bd->pa[index], tb2_len),
1931                                 PCI_DMA_TODEVICE);
1932
1933                 else if (i > 0)
1934                         pci_unmap_single(dev,
1935                                          le32_to_cpu(bd->pa[index].tb1_addr),
1936                                          IWL_GET_BITS(bd->pa[index], tb1_len),
1937                                          PCI_DMA_TODEVICE);
1938
1939                 /* Free SKB, if any, for this chunk */
1940                 if (txq->txb[txq->q.read_ptr].skb[i]) {
1941                         struct sk_buff *skb = txq->txb[txq->q.read_ptr].skb[i];
1942
1943                         dev_kfree_skb(skb);
1944                         txq->txb[txq->q.read_ptr].skb[i] = NULL;
1945                 }
1946         }
1947         return 0;
1948 }
1949
1950 int iwl4965_hw_reg_set_txpower(struct iwl4965_priv *priv, s8 power)
1951 {
1952         IWL_ERROR("TODO: Implement iwl4965_hw_reg_set_txpower!\n");
1953         return -EINVAL;
1954 }
1955
1956 static s32 iwl4965_math_div_round(s32 num, s32 denom, s32 *res)
1957 {
1958         s32 sign = 1;
1959
1960         if (num < 0) {
1961                 sign = -sign;
1962                 num = -num;
1963         }
1964         if (denom < 0) {
1965                 sign = -sign;
1966                 denom = -denom;
1967         }
1968         *res = 1;
1969         *res = ((num * 2 + denom) / (denom * 2)) * sign;
1970
1971         return 1;
1972 }
1973
1974 /**
1975  * iwl4965_get_voltage_compensation - Power supply voltage comp for txpower
1976  *
1977  * Determines power supply voltage compensation for txpower calculations.
1978  * Returns number of 1/2-dB steps to subtract from gain table index,
1979  * to compensate for difference between power supply voltage during
1980  * factory measurements, vs. current power supply voltage.
1981  *
1982  * Voltage indication is higher for lower voltage.
1983  * Lower voltage requires more gain (lower gain table index).
1984  */
1985 static s32 iwl4965_get_voltage_compensation(s32 eeprom_voltage,
1986                                             s32 current_voltage)
1987 {
1988         s32 comp = 0;
1989
1990         if ((TX_POWER_IWL_ILLEGAL_VOLTAGE == eeprom_voltage) ||
1991             (TX_POWER_IWL_ILLEGAL_VOLTAGE == current_voltage))
1992                 return 0;
1993
1994         iwl4965_math_div_round(current_voltage - eeprom_voltage,
1995                                TX_POWER_IWL_VOLTAGE_CODES_PER_03V, &comp);
1996
1997         if (current_voltage > eeprom_voltage)
1998                 comp *= 2;
1999         if ((comp < -2) || (comp > 2))
2000                 comp = 0;
2001
2002         return comp;
2003 }
2004
2005 static const struct iwl4965_channel_info *
2006 iwl4965_get_channel_txpower_info(struct iwl4965_priv *priv,
2007                                  enum ieee80211_band band, u16 channel)
2008 {
2009         const struct iwl4965_channel_info *ch_info;
2010
2011         ch_info = iwl4965_get_channel_info(priv, band, channel);
2012
2013         if (!is_channel_valid(ch_info))
2014                 return NULL;
2015
2016         return ch_info;
2017 }
2018
2019 static s32 iwl4965_get_tx_atten_grp(u16 channel)
2020 {
2021         if (channel >= CALIB_IWL_TX_ATTEN_GR5_FCH &&
2022             channel <= CALIB_IWL_TX_ATTEN_GR5_LCH)
2023                 return CALIB_CH_GROUP_5;
2024
2025         if (channel >= CALIB_IWL_TX_ATTEN_GR1_FCH &&
2026             channel <= CALIB_IWL_TX_ATTEN_GR1_LCH)
2027                 return CALIB_CH_GROUP_1;
2028
2029         if (channel >= CALIB_IWL_TX_ATTEN_GR2_FCH &&
2030             channel <= CALIB_IWL_TX_ATTEN_GR2_LCH)
2031                 return CALIB_CH_GROUP_2;
2032
2033         if (channel >= CALIB_IWL_TX_ATTEN_GR3_FCH &&
2034             channel <= CALIB_IWL_TX_ATTEN_GR3_LCH)
2035                 return CALIB_CH_GROUP_3;
2036
2037         if (channel >= CALIB_IWL_TX_ATTEN_GR4_FCH &&
2038             channel <= CALIB_IWL_TX_ATTEN_GR4_LCH)
2039                 return CALIB_CH_GROUP_4;
2040
2041         IWL_ERROR("Can't find txatten group for channel %d.\n", channel);
2042         return -1;
2043 }
2044
2045 static u32 iwl4965_get_sub_band(const struct iwl4965_priv *priv, u32 channel)
2046 {
2047         s32 b = -1;
2048
2049         for (b = 0; b < EEPROM_TX_POWER_BANDS; b++) {
2050                 if (priv->eeprom.calib_info.band_info[b].ch_from == 0)
2051                         continue;
2052
2053                 if ((channel >= priv->eeprom.calib_info.band_info[b].ch_from)
2054                     && (channel <= priv->eeprom.calib_info.band_info[b].ch_to))
2055                         break;
2056         }
2057
2058         return b;
2059 }
2060
2061 static s32 iwl4965_interpolate_value(s32 x, s32 x1, s32 y1, s32 x2, s32 y2)
2062 {
2063         s32 val;
2064
2065         if (x2 == x1)
2066                 return y1;
2067         else {
2068                 iwl4965_math_div_round((x2 - x) * (y1 - y2), (x2 - x1), &val);
2069                 return val + y2;
2070         }
2071 }
2072
2073 /**
2074  * iwl4965_interpolate_chan - Interpolate factory measurements for one channel
2075  *
2076  * Interpolates factory measurements from the two sample channels within a
2077  * sub-band, to apply to channel of interest.  Interpolation is proportional to
2078  * differences in channel frequencies, which is proportional to differences
2079  * in channel number.
2080  */
2081 static int iwl4965_interpolate_chan(struct iwl4965_priv *priv, u32 channel,
2082                                     struct iwl4965_eeprom_calib_ch_info *chan_info)
2083 {
2084         s32 s = -1;
2085         u32 c;
2086         u32 m;
2087         const struct iwl4965_eeprom_calib_measure *m1;
2088         const struct iwl4965_eeprom_calib_measure *m2;
2089         struct iwl4965_eeprom_calib_measure *omeas;
2090         u32 ch_i1;
2091         u32 ch_i2;
2092
2093         s = iwl4965_get_sub_band(priv, channel);
2094         if (s >= EEPROM_TX_POWER_BANDS) {
2095                 IWL_ERROR("Tx Power can not find channel %d ", channel);
2096                 return -1;
2097         }
2098
2099         ch_i1 = priv->eeprom.calib_info.band_info[s].ch1.ch_num;
2100         ch_i2 = priv->eeprom.calib_info.band_info[s].ch2.ch_num;
2101         chan_info->ch_num = (u8) channel;
2102
2103         IWL_DEBUG_TXPOWER("channel %d subband %d factory cal ch %d & %d\n",
2104                           channel, s, ch_i1, ch_i2);
2105
2106         for (c = 0; c < EEPROM_TX_POWER_TX_CHAINS; c++) {
2107                 for (m = 0; m < EEPROM_TX_POWER_MEASUREMENTS; m++) {
2108                         m1 = &(priv->eeprom.calib_info.band_info[s].ch1.
2109                                measurements[c][m]);
2110                         m2 = &(priv->eeprom.calib_info.band_info[s].ch2.
2111                                measurements[c][m]);
2112                         omeas = &(chan_info->measurements[c][m]);
2113
2114                         omeas->actual_pow =
2115                             (u8) iwl4965_interpolate_value(channel, ch_i1,
2116                                                            m1->actual_pow,
2117                                                            ch_i2,
2118                                                            m2->actual_pow);
2119                         omeas->gain_idx =
2120                             (u8) iwl4965_interpolate_value(channel, ch_i1,
2121                                                            m1->gain_idx, ch_i2,
2122                                                            m2->gain_idx);
2123                         omeas->temperature =
2124                             (u8) iwl4965_interpolate_value(channel, ch_i1,
2125                                                            m1->temperature,
2126                                                            ch_i2,
2127                                                            m2->temperature);
2128                         omeas->pa_det =
2129                             (s8) iwl4965_interpolate_value(channel, ch_i1,
2130                                                            m1->pa_det, ch_i2,
2131                                                            m2->pa_det);
2132
2133                         IWL_DEBUG_TXPOWER
2134                             ("chain %d meas %d AP1=%d AP2=%d AP=%d\n", c, m,
2135                              m1->actual_pow, m2->actual_pow, omeas->actual_pow);
2136                         IWL_DEBUG_TXPOWER
2137                             ("chain %d meas %d NI1=%d NI2=%d NI=%d\n", c, m,
2138                              m1->gain_idx, m2->gain_idx, omeas->gain_idx);
2139                         IWL_DEBUG_TXPOWER
2140                             ("chain %d meas %d PA1=%d PA2=%d PA=%d\n", c, m,
2141                              m1->pa_det, m2->pa_det, omeas->pa_det);
2142                         IWL_DEBUG_TXPOWER
2143                             ("chain %d meas %d  T1=%d  T2=%d  T=%d\n", c, m,
2144                              m1->temperature, m2->temperature,
2145                              omeas->temperature);
2146                 }
2147         }
2148
2149         return 0;
2150 }
2151
2152 /* bit-rate-dependent table to prevent Tx distortion, in half-dB units,
2153  * for OFDM 6, 12, 18, 24, 36, 48, 54, 60 MBit, and CCK all rates. */
2154 static s32 back_off_table[] = {
2155         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 20 MHz */
2156         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 20 MHz */
2157         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 40 MHz */
2158         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 40 MHz */
2159         10                      /* CCK */
2160 };
2161
2162 /* Thermal compensation values for txpower for various frequency ranges ...
2163  *   ratios from 3:1 to 4.5:1 of degrees (Celsius) per half-dB gain adjust */
2164 static struct iwl4965_txpower_comp_entry {
2165         s32 degrees_per_05db_a;
2166         s32 degrees_per_05db_a_denom;
2167 } tx_power_cmp_tble[CALIB_CH_GROUP_MAX] = {
2168         {9, 2},                 /* group 0 5.2, ch  34-43 */
2169         {4, 1},                 /* group 1 5.2, ch  44-70 */
2170         {4, 1},                 /* group 2 5.2, ch  71-124 */
2171         {4, 1},                 /* group 3 5.2, ch 125-200 */
2172         {3, 1}                  /* group 4 2.4, ch   all */
2173 };
2174
2175 static s32 get_min_power_index(s32 rate_power_index, u32 band)
2176 {
2177         if (!band) {
2178                 if ((rate_power_index & 7) <= 4)
2179                         return MIN_TX_GAIN_INDEX_52GHZ_EXT;
2180         }
2181         return MIN_TX_GAIN_INDEX;
2182 }
2183
2184 struct gain_entry {
2185         u8 dsp;
2186         u8 radio;
2187 };
2188
2189 static const struct gain_entry gain_table[2][108] = {
2190         /* 5.2GHz power gain index table */
2191         {
2192          {123, 0x3F},           /* highest txpower */
2193          {117, 0x3F},
2194          {110, 0x3F},
2195          {104, 0x3F},
2196          {98, 0x3F},
2197          {110, 0x3E},
2198          {104, 0x3E},
2199          {98, 0x3E},
2200          {110, 0x3D},
2201          {104, 0x3D},
2202          {98, 0x3D},
2203          {110, 0x3C},
2204          {104, 0x3C},
2205          {98, 0x3C},
2206          {110, 0x3B},
2207          {104, 0x3B},
2208          {98, 0x3B},
2209          {110, 0x3A},
2210          {104, 0x3A},
2211          {98, 0x3A},
2212          {110, 0x39},
2213          {104, 0x39},
2214          {98, 0x39},
2215          {110, 0x38},
2216          {104, 0x38},
2217          {98, 0x38},
2218          {110, 0x37},
2219          {104, 0x37},
2220          {98, 0x37},
2221          {110, 0x36},
2222          {104, 0x36},
2223          {98, 0x36},
2224          {110, 0x35},
2225          {104, 0x35},
2226          {98, 0x35},
2227          {110, 0x34},
2228          {104, 0x34},
2229          {98, 0x34},
2230          {110, 0x33},
2231          {104, 0x33},
2232          {98, 0x33},
2233          {110, 0x32},
2234          {104, 0x32},
2235          {98, 0x32},
2236          {110, 0x31},
2237          {104, 0x31},
2238          {98, 0x31},
2239          {110, 0x30},
2240          {104, 0x30},
2241          {98, 0x30},
2242          {110, 0x25},
2243          {104, 0x25},
2244          {98, 0x25},
2245          {110, 0x24},
2246          {104, 0x24},
2247          {98, 0x24},
2248          {110, 0x23},
2249          {104, 0x23},
2250          {98, 0x23},
2251          {110, 0x22},
2252          {104, 0x18},
2253          {98, 0x18},
2254          {110, 0x17},
2255          {104, 0x17},
2256          {98, 0x17},
2257          {110, 0x16},
2258          {104, 0x16},
2259          {98, 0x16},
2260          {110, 0x15},
2261          {104, 0x15},
2262          {98, 0x15},
2263          {110, 0x14},
2264          {104, 0x14},
2265          {98, 0x14},
2266          {110, 0x13},
2267          {104, 0x13},
2268          {98, 0x13},
2269          {110, 0x12},
2270          {104, 0x08},
2271          {98, 0x08},
2272          {110, 0x07},
2273          {104, 0x07},
2274          {98, 0x07},
2275          {110, 0x06},
2276          {104, 0x06},
2277          {98, 0x06},
2278          {110, 0x05},
2279          {104, 0x05},
2280          {98, 0x05},
2281          {110, 0x04},
2282          {104, 0x04},
2283          {98, 0x04},
2284          {110, 0x03},
2285          {104, 0x03},
2286          {98, 0x03},
2287          {110, 0x02},
2288          {104, 0x02},
2289          {98, 0x02},
2290          {110, 0x01},
2291          {104, 0x01},
2292          {98, 0x01},
2293          {110, 0x00},
2294          {104, 0x00},
2295          {98, 0x00},
2296          {93, 0x00},
2297          {88, 0x00},
2298          {83, 0x00},
2299          {78, 0x00},
2300          },
2301         /* 2.4GHz power gain index table */
2302         {
2303          {110, 0x3f},           /* highest txpower */
2304          {104, 0x3f},
2305          {98, 0x3f},
2306          {110, 0x3e},
2307          {104, 0x3e},
2308          {98, 0x3e},
2309          {110, 0x3d},
2310          {104, 0x3d},
2311          {98, 0x3d},
2312          {110, 0x3c},
2313          {104, 0x3c},
2314          {98, 0x3c},
2315          {110, 0x3b},
2316          {104, 0x3b},
2317          {98, 0x3b},
2318          {110, 0x3a},
2319          {104, 0x3a},
2320          {98, 0x3a},
2321          {110, 0x39},
2322          {104, 0x39},
2323          {98, 0x39},
2324          {110, 0x38},
2325          {104, 0x38},
2326          {98, 0x38},
2327          {110, 0x37},
2328          {104, 0x37},
2329          {98, 0x37},
2330          {110, 0x36},
2331          {104, 0x36},
2332          {98, 0x36},
2333          {110, 0x35},
2334          {104, 0x35},
2335          {98, 0x35},
2336          {110, 0x34},
2337          {104, 0x34},
2338          {98, 0x34},
2339          {110, 0x33},
2340          {104, 0x33},
2341          {98, 0x33},
2342          {110, 0x32},
2343          {104, 0x32},
2344          {98, 0x32},
2345          {110, 0x31},
2346          {104, 0x31},
2347          {98, 0x31},
2348          {110, 0x30},
2349          {104, 0x30},
2350          {98, 0x30},
2351          {110, 0x6},
2352          {104, 0x6},
2353          {98, 0x6},
2354          {110, 0x5},
2355          {104, 0x5},
2356          {98, 0x5},
2357          {110, 0x4},
2358          {104, 0x4},
2359          {98, 0x4},
2360          {110, 0x3},
2361          {104, 0x3},
2362          {98, 0x3},
2363          {110, 0x2},
2364          {104, 0x2},
2365          {98, 0x2},
2366          {110, 0x1},
2367          {104, 0x1},
2368          {98, 0x1},
2369          {110, 0x0},
2370          {104, 0x0},
2371          {98, 0x0},
2372          {97, 0},
2373          {96, 0},
2374          {95, 0},
2375          {94, 0},
2376          {93, 0},
2377          {92, 0},
2378          {91, 0},
2379          {90, 0},
2380          {89, 0},
2381          {88, 0},
2382          {87, 0},
2383          {86, 0},
2384          {85, 0},
2385          {84, 0},
2386          {83, 0},
2387          {82, 0},
2388          {81, 0},
2389          {80, 0},
2390          {79, 0},
2391          {78, 0},
2392          {77, 0},
2393          {76, 0},
2394          {75, 0},
2395          {74, 0},
2396          {73, 0},
2397          {72, 0},
2398          {71, 0},
2399          {70, 0},
2400          {69, 0},
2401          {68, 0},
2402          {67, 0},
2403          {66, 0},
2404          {65, 0},
2405          {64, 0},
2406          {63, 0},
2407          {62, 0},
2408          {61, 0},
2409          {60, 0},
2410          {59, 0},
2411          }
2412 };
2413
2414 static int iwl4965_fill_txpower_tbl(struct iwl4965_priv *priv, u8 band, u16 channel,
2415                                     u8 is_fat, u8 ctrl_chan_high,
2416                                     struct iwl4965_tx_power_db *tx_power_tbl)
2417 {
2418         u8 saturation_power;
2419         s32 target_power;
2420         s32 user_target_power;
2421         s32 power_limit;
2422         s32 current_temp;
2423         s32 reg_limit;
2424         s32 current_regulatory;
2425         s32 txatten_grp = CALIB_CH_GROUP_MAX;
2426         int i;
2427         int c;
2428         const struct iwl4965_channel_info *ch_info = NULL;
2429         struct iwl4965_eeprom_calib_ch_info ch_eeprom_info;
2430         const struct iwl4965_eeprom_calib_measure *measurement;
2431         s16 voltage;
2432         s32 init_voltage;
2433         s32 voltage_compensation;
2434         s32 degrees_per_05db_num;
2435         s32 degrees_per_05db_denom;
2436         s32 factory_temp;
2437         s32 temperature_comp[2];
2438         s32 factory_gain_index[2];
2439         s32 factory_actual_pwr[2];
2440         s32 power_index;
2441
2442         /* Sanity check requested level (dBm) */
2443         if (priv->user_txpower_limit < IWL_TX_POWER_TARGET_POWER_MIN) {
2444                 IWL_WARNING("Requested user TXPOWER %d below limit.\n",
2445                             priv->user_txpower_limit);
2446                 return -EINVAL;
2447         }
2448         if (priv->user_txpower_limit > IWL_TX_POWER_TARGET_POWER_MAX) {
2449                 IWL_WARNING("Requested user TXPOWER %d above limit.\n",
2450                             priv->user_txpower_limit);
2451                 return -EINVAL;
2452         }
2453
2454         /* user_txpower_limit is in dBm, convert to half-dBm (half-dB units
2455          *   are used for indexing into txpower table) */
2456         user_target_power = 2 * priv->user_txpower_limit;
2457
2458         /* Get current (RXON) channel, band, width */
2459         ch_info =
2460                 iwl4965_get_channel_txpower_info(priv, priv->band, channel);
2461
2462         IWL_DEBUG_TXPOWER("chan %d band %d is_fat %d\n", channel, band,
2463                           is_fat);
2464
2465         if (!ch_info)
2466                 return -EINVAL;
2467
2468         /* get txatten group, used to select 1) thermal txpower adjustment
2469          *   and 2) mimo txpower balance between Tx chains. */
2470         txatten_grp = iwl4965_get_tx_atten_grp(channel);
2471         if (txatten_grp < 0)
2472                 return -EINVAL;
2473
2474         IWL_DEBUG_TXPOWER("channel %d belongs to txatten group %d\n",
2475                           channel, txatten_grp);
2476
2477         if (is_fat) {
2478                 if (ctrl_chan_high)
2479                         channel -= 2;
2480                 else
2481                         channel += 2;
2482         }
2483
2484         /* hardware txpower limits ...
2485          * saturation (clipping distortion) txpowers are in half-dBm */
2486         if (band)
2487                 saturation_power = priv->eeprom.calib_info.saturation_power24;
2488         else
2489                 saturation_power = priv->eeprom.calib_info.saturation_power52;
2490
2491         if (saturation_power < IWL_TX_POWER_SATURATION_MIN ||
2492             saturation_power > IWL_TX_POWER_SATURATION_MAX) {
2493                 if (band)
2494                         saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_24;
2495                 else
2496                         saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_52;
2497         }
2498
2499         /* regulatory txpower limits ... reg_limit values are in half-dBm,
2500          *   max_power_avg values are in dBm, convert * 2 */
2501         if (is_fat)
2502                 reg_limit = ch_info->fat_max_power_avg * 2;
2503         else
2504                 reg_limit = ch_info->max_power_avg * 2;
2505
2506         if ((reg_limit < IWL_TX_POWER_REGULATORY_MIN) ||
2507             (reg_limit > IWL_TX_POWER_REGULATORY_MAX)) {
2508                 if (band)
2509                         reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_24;
2510                 else
2511                         reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_52;
2512         }
2513
2514         /* Interpolate txpower calibration values for this channel,
2515          *   based on factory calibration tests on spaced channels. */
2516         iwl4965_interpolate_chan(priv, channel, &ch_eeprom_info);
2517
2518         /* calculate tx gain adjustment based on power supply voltage */
2519         voltage = priv->eeprom.calib_info.voltage;
2520         init_voltage = (s32)le32_to_cpu(priv->card_alive_init.voltage);
2521         voltage_compensation =
2522             iwl4965_get_voltage_compensation(voltage, init_voltage);
2523
2524         IWL_DEBUG_TXPOWER("curr volt %d eeprom volt %d volt comp %d\n",
2525                           init_voltage,
2526                           voltage, voltage_compensation);
2527
2528         /* get current temperature (Celsius) */
2529         current_temp = max(priv->temperature, IWL_TX_POWER_TEMPERATURE_MIN);
2530         current_temp = min(priv->temperature, IWL_TX_POWER_TEMPERATURE_MAX);
2531         current_temp = KELVIN_TO_CELSIUS(current_temp);
2532
2533         /* select thermal txpower adjustment params, based on channel group
2534          *   (same frequency group used for mimo txatten adjustment) */
2535         degrees_per_05db_num =
2536             tx_power_cmp_tble[txatten_grp].degrees_per_05db_a;
2537         degrees_per_05db_denom =
2538             tx_power_cmp_tble[txatten_grp].degrees_per_05db_a_denom;
2539
2540         /* get per-chain txpower values from factory measurements */
2541         for (c = 0; c < 2; c++) {
2542                 measurement = &ch_eeprom_info.measurements[c][1];
2543
2544                 /* txgain adjustment (in half-dB steps) based on difference
2545                  *   between factory and current temperature */
2546                 factory_temp = measurement->temperature;
2547                 iwl4965_math_div_round((current_temp - factory_temp) *
2548                                        degrees_per_05db_denom,
2549                                        degrees_per_05db_num,
2550                                        &temperature_comp[c]);
2551
2552                 factory_gain_index[c] = measurement->gain_idx;
2553                 factory_actual_pwr[c] = measurement->actual_pow;
2554
2555                 IWL_DEBUG_TXPOWER("chain = %d\n", c);
2556                 IWL_DEBUG_TXPOWER("fctry tmp %d, "
2557                                   "curr tmp %d, comp %d steps\n",
2558                                   factory_temp, current_temp,
2559                                   temperature_comp[c]);
2560
2561                 IWL_DEBUG_TXPOWER("fctry idx %d, fctry pwr %d\n",
2562                                   factory_gain_index[c],
2563                                   factory_actual_pwr[c]);
2564         }
2565
2566         /* for each of 33 bit-rates (including 1 for CCK) */
2567         for (i = 0; i < POWER_TABLE_NUM_ENTRIES; i++) {
2568                 u8 is_mimo_rate;
2569                 union iwl4965_tx_power_dual_stream tx_power;
2570
2571                 /* for mimo, reduce each chain's txpower by half
2572                  * (3dB, 6 steps), so total output power is regulatory
2573                  * compliant. */
2574                 if (i & 0x8) {
2575                         current_regulatory = reg_limit -
2576                             IWL_TX_POWER_MIMO_REGULATORY_COMPENSATION;
2577                         is_mimo_rate = 1;
2578                 } else {
2579                         current_regulatory = reg_limit;
2580                         is_mimo_rate = 0;
2581                 }
2582
2583                 /* find txpower limit, either hardware or regulatory */
2584                 power_limit = saturation_power - back_off_table[i];
2585                 if (power_limit > current_regulatory)
2586                         power_limit = current_regulatory;
2587
2588                 /* reduce user's txpower request if necessary
2589                  * for this rate on this channel */
2590                 target_power = user_target_power;
2591                 if (target_power > power_limit)
2592                         target_power = power_limit;
2593
2594                 IWL_DEBUG_TXPOWER("rate %d sat %d reg %d usr %d tgt %d\n",
2595                                   i, saturation_power - back_off_table[i],
2596                                   current_regulatory, user_target_power,
2597                                   target_power);
2598
2599                 /* for each of 2 Tx chains (radio transmitters) */
2600                 for (c = 0; c < 2; c++) {
2601                         s32 atten_value;
2602
2603                         if (is_mimo_rate)
2604                                 atten_value =
2605                                     (s32)le32_to_cpu(priv->card_alive_init.
2606                                     tx_atten[txatten_grp][c]);
2607                         else
2608                                 atten_value = 0;
2609
2610                         /* calculate index; higher index means lower txpower */
2611                         power_index = (u8) (factory_gain_index[c] -
2612                                             (target_power -
2613                                              factory_actual_pwr[c]) -
2614                                             temperature_comp[c] -
2615                                             voltage_compensation +
2616                                             atten_value);
2617
2618 /*                      IWL_DEBUG_TXPOWER("calculated txpower index %d\n",
2619                                                 power_index); */
2620
2621                         if (power_index < get_min_power_index(i, band))
2622                                 power_index = get_min_power_index(i, band);
2623
2624                         /* adjust 5 GHz index to support negative indexes */
2625                         if (!band)
2626                                 power_index += 9;
2627
2628                         /* CCK, rate 32, reduce txpower for CCK */
2629                         if (i == POWER_TABLE_CCK_ENTRY)
2630                                 power_index +=
2631                                     IWL_TX_POWER_CCK_COMPENSATION_C_STEP;
2632
2633                         /* stay within the table! */
2634                         if (power_index > 107) {
2635                                 IWL_WARNING("txpower index %d > 107\n",
2636                                             power_index);
2637                                 power_index = 107;
2638                         }
2639                         if (power_index < 0) {
2640                                 IWL_WARNING("txpower index %d < 0\n",
2641                                             power_index);
2642                                 power_index = 0;
2643                         }
2644
2645                         /* fill txpower command for this rate/chain */
2646                         tx_power.s.radio_tx_gain[c] =
2647                                 gain_table[band][power_index].radio;
2648                         tx_power.s.dsp_predis_atten[c] =
2649                                 gain_table[band][power_index].dsp;
2650
2651                         IWL_DEBUG_TXPOWER("chain %d mimo %d index %d "
2652                                           "gain 0x%02x dsp %d\n",
2653                                           c, atten_value, power_index,
2654                                         tx_power.s.radio_tx_gain[c],
2655                                         tx_power.s.dsp_predis_atten[c]);
2656                 }/* for each chain */
2657
2658                 tx_power_tbl->power_tbl[i].dw = cpu_to_le32(tx_power.dw);
2659
2660         }/* for each rate */
2661
2662         return 0;
2663 }
2664
2665 /**
2666  * iwl4965_hw_reg_send_txpower - Configure the TXPOWER level user limit
2667  *
2668  * Uses the active RXON for channel, band, and characteristics (fat, high)
2669  * The power limit is taken from priv->user_txpower_limit.
2670  */
2671 int iwl4965_hw_reg_send_txpower(struct iwl4965_priv *priv)
2672 {
2673         struct iwl4965_txpowertable_cmd cmd = { 0 };
2674         int rc = 0;
2675         u8 band = 0;
2676         u8 is_fat = 0;
2677         u8 ctrl_chan_high = 0;
2678
2679         if (test_bit(STATUS_SCANNING, &priv->status)) {
2680                 /* If this gets hit a lot, switch it to a BUG() and catch
2681                  * the stack trace to find out who is calling this during
2682                  * a scan. */
2683                 IWL_WARNING("TX Power requested while scanning!\n");
2684                 return -EAGAIN;
2685         }
2686
2687         band = priv->band == IEEE80211_BAND_2GHZ;
2688
2689         is_fat =  is_fat_channel(priv->active_rxon.flags);
2690
2691         if (is_fat &&
2692             (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
2693                 ctrl_chan_high = 1;
2694
2695         cmd.band = band;
2696         cmd.channel = priv->active_rxon.channel;
2697
2698         rc = iwl4965_fill_txpower_tbl(priv, band,
2699                                 le16_to_cpu(priv->active_rxon.channel),
2700                                 is_fat, ctrl_chan_high, &cmd.tx_power);
2701         if (rc)
2702                 return rc;
2703
2704         rc = iwl4965_send_cmd_pdu(priv, REPLY_TX_PWR_TABLE_CMD, sizeof(cmd), &cmd);
2705         return rc;
2706 }
2707
2708 int iwl4965_hw_channel_switch(struct iwl4965_priv *priv, u16 channel)
2709 {
2710         int rc;
2711         u8 band = 0;
2712         u8 is_fat = 0;
2713         u8 ctrl_chan_high = 0;
2714         struct iwl4965_channel_switch_cmd cmd = { 0 };
2715         const struct iwl4965_channel_info *ch_info;
2716
2717         band = priv->band == IEEE80211_BAND_2GHZ;
2718
2719         ch_info = iwl4965_get_channel_info(priv, priv->band, channel);
2720
2721         is_fat = is_fat_channel(priv->staging_rxon.flags);
2722
2723         if (is_fat &&
2724             (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
2725                 ctrl_chan_high = 1;
2726
2727         cmd.band = band;
2728         cmd.expect_beacon = 0;
2729         cmd.channel = cpu_to_le16(channel);
2730         cmd.rxon_flags = priv->active_rxon.flags;
2731         cmd.rxon_filter_flags = priv->active_rxon.filter_flags;
2732         cmd.switch_time = cpu_to_le32(priv->ucode_beacon_time);
2733         if (ch_info)
2734                 cmd.expect_beacon = is_channel_radar(ch_info);
2735         else
2736                 cmd.expect_beacon = 1;
2737
2738         rc = iwl4965_fill_txpower_tbl(priv, band, channel, is_fat,
2739                                       ctrl_chan_high, &cmd.tx_power);
2740         if (rc) {
2741                 IWL_DEBUG_11H("error:%d  fill txpower_tbl\n", rc);
2742                 return rc;
2743         }
2744
2745         rc = iwl4965_send_cmd_pdu(priv, REPLY_CHANNEL_SWITCH, sizeof(cmd), &cmd);
2746         return rc;
2747 }
2748
2749 #define RTS_HCCA_RETRY_LIMIT            3
2750 #define RTS_DFAULT_RETRY_LIMIT          60
2751
2752 void iwl4965_hw_build_tx_cmd_rate(struct iwl4965_priv *priv,
2753                               struct iwl4965_cmd *cmd,
2754                               struct ieee80211_tx_control *ctrl,
2755                               struct ieee80211_hdr *hdr, int sta_id,
2756                               int is_hcca)
2757 {
2758         struct iwl4965_tx_cmd *tx = &cmd->cmd.tx;
2759         u8 rts_retry_limit = 0;
2760         u8 data_retry_limit = 0;
2761         u16 fc = le16_to_cpu(hdr->frame_control);
2762         u8 rate_plcp;
2763         u16 rate_flags = 0;
2764         int rate_idx = min(ctrl->tx_rate->hw_value & 0xffff, IWL_RATE_COUNT - 1);
2765
2766         rate_plcp = iwl4965_rates[rate_idx].plcp;
2767
2768         rts_retry_limit = (is_hcca) ?
2769             RTS_HCCA_RETRY_LIMIT : RTS_DFAULT_RETRY_LIMIT;
2770
2771         if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
2772                 rate_flags |= RATE_MCS_CCK_MSK;
2773
2774
2775         if (ieee80211_is_probe_response(fc)) {
2776                 data_retry_limit = 3;
2777                 if (data_retry_limit < rts_retry_limit)
2778                         rts_retry_limit = data_retry_limit;
2779         } else
2780                 data_retry_limit = IWL_DEFAULT_TX_RETRY;
2781
2782         if (priv->data_retry_limit != -1)
2783                 data_retry_limit = priv->data_retry_limit;
2784
2785
2786         if (ieee80211_is_data(fc)) {
2787                 tx->initial_rate_index = 0;
2788                 tx->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
2789         } else {
2790                 switch (fc & IEEE80211_FCTL_STYPE) {
2791                 case IEEE80211_STYPE_AUTH:
2792                 case IEEE80211_STYPE_DEAUTH:
2793                 case IEEE80211_STYPE_ASSOC_REQ:
2794                 case IEEE80211_STYPE_REASSOC_REQ:
2795                         if (tx->tx_flags & TX_CMD_FLG_RTS_MSK) {
2796                                 tx->tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2797                                 tx->tx_flags |= TX_CMD_FLG_CTS_MSK;
2798                         }
2799                         break;
2800                 default:
2801                         break;
2802                 }
2803
2804                 /* Alternate between antenna A and B for successive frames */
2805                 if (priv->use_ant_b_for_management_frame) {
2806                         priv->use_ant_b_for_management_frame = 0;
2807                         rate_flags |= RATE_MCS_ANT_B_MSK;
2808                 } else {
2809                         priv->use_ant_b_for_management_frame = 1;
2810                         rate_flags |= RATE_MCS_ANT_A_MSK;
2811                 }
2812         }
2813
2814         tx->rts_retry_limit = rts_retry_limit;
2815         tx->data_retry_limit = data_retry_limit;
2816         tx->rate_n_flags = iwl4965_hw_set_rate_n_flags(rate_plcp, rate_flags);
2817 }
2818
2819 int iwl4965_hw_get_rx_read(struct iwl4965_priv *priv)
2820 {
2821         struct iwl4965_shared *shared_data = priv->hw_setting.shared_virt;
2822
2823         return IWL_GET_BITS(*shared_data, rb_closed_stts_rb_num);
2824 }
2825
2826 int iwl4965_hw_get_temperature(struct iwl4965_priv *priv)
2827 {
2828         return priv->temperature;
2829 }
2830
2831 unsigned int iwl4965_hw_get_beacon_cmd(struct iwl4965_priv *priv,
2832                           struct iwl4965_frame *frame, u8 rate)
2833 {
2834         struct iwl4965_tx_beacon_cmd *tx_beacon_cmd;
2835         unsigned int frame_size;
2836
2837         tx_beacon_cmd = &frame->u.beacon;
2838         memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
2839
2840         tx_beacon_cmd->tx.sta_id = priv->hw_setting.bcast_sta_id;
2841         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2842
2843         frame_size = iwl4965_fill_beacon_frame(priv,
2844                                 tx_beacon_cmd->frame,
2845                                 iwl4965_broadcast_addr,
2846                                 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
2847
2848         BUG_ON(frame_size > MAX_MPDU_SIZE);
2849         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
2850
2851         if ((rate == IWL_RATE_1M_PLCP) || (rate >= IWL_RATE_2M_PLCP))
2852                 tx_beacon_cmd->tx.rate_n_flags =
2853                         iwl4965_hw_set_rate_n_flags(rate, RATE_MCS_CCK_MSK);
2854         else
2855                 tx_beacon_cmd->tx.rate_n_flags =
2856                         iwl4965_hw_set_rate_n_flags(rate, 0);
2857
2858         tx_beacon_cmd->tx.tx_flags = (TX_CMD_FLG_SEQ_CTL_MSK |
2859                                 TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK);
2860         return (sizeof(*tx_beacon_cmd) + frame_size);
2861 }
2862
2863 /*
2864  * Tell 4965 where to find circular buffer of Tx Frame Descriptors for
2865  * given Tx queue, and enable the DMA channel used for that queue.
2866  *
2867  * 4965 supports up to 16 Tx queues in DRAM, mapped to up to 8 Tx DMA
2868  * channels supported in hardware.
2869  */
2870 int iwl4965_hw_tx_queue_init(struct iwl4965_priv *priv, struct iwl4965_tx_queue *txq)
2871 {
2872         int rc;
2873         unsigned long flags;
2874         int txq_id = txq->q.id;
2875
2876         spin_lock_irqsave(&priv->lock, flags);
2877         rc = iwl4965_grab_nic_access(priv);
2878         if (rc) {
2879                 spin_unlock_irqrestore(&priv->lock, flags);
2880                 return rc;
2881         }
2882
2883         /* Circular buffer (TFD queue in DRAM) physical base address */
2884         iwl4965_write_direct32(priv, FH_MEM_CBBC_QUEUE(txq_id),
2885                              txq->q.dma_addr >> 8);
2886
2887         /* Enable DMA channel, using same id as for TFD queue */
2888         iwl4965_write_direct32(
2889                 priv, IWL_FH_TCSR_CHNL_TX_CONFIG_REG(txq_id),
2890                 IWL_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE |
2891                 IWL_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE_VAL);
2892         iwl4965_release_nic_access(priv);
2893         spin_unlock_irqrestore(&priv->lock, flags);
2894
2895         return 0;
2896 }
2897
2898 int iwl4965_hw_txq_attach_buf_to_tfd(struct iwl4965_priv *priv, void *ptr,
2899                                  dma_addr_t addr, u16 len)
2900 {
2901         int index, is_odd;
2902         struct iwl4965_tfd_frame *tfd = ptr;
2903         u32 num_tbs = IWL_GET_BITS(*tfd, num_tbs);
2904
2905         /* Each TFD can point to a maximum 20 Tx buffers */
2906         if ((num_tbs >= MAX_NUM_OF_TBS) || (num_tbs < 0)) {
2907                 IWL_ERROR("Error can not send more than %d chunks\n",
2908                           MAX_NUM_OF_TBS);
2909                 return -EINVAL;
2910         }
2911
2912         index = num_tbs / 2;
2913         is_odd = num_tbs & 0x1;
2914
2915         if (!is_odd) {
2916                 tfd->pa[index].tb1_addr = cpu_to_le32(addr);
2917                 IWL_SET_BITS(tfd->pa[index], tb1_addr_hi,
2918                              iwl_get_dma_hi_address(addr));
2919                 IWL_SET_BITS(tfd->pa[index], tb1_len, len);
2920         } else {
2921                 IWL_SET_BITS(tfd->pa[index], tb2_addr_lo16,
2922                              (u32) (addr & 0xffff));
2923                 IWL_SET_BITS(tfd->pa[index], tb2_addr_hi20, addr >> 16);
2924                 IWL_SET_BITS(tfd->pa[index], tb2_len, len);
2925         }
2926
2927         IWL_SET_BITS(*tfd, num_tbs, num_tbs + 1);
2928
2929         return 0;
2930 }
2931
2932 static void iwl4965_hw_card_show_info(struct iwl4965_priv *priv)
2933 {
2934         u16 hw_version = priv->eeprom.board_revision_4965;
2935
2936         IWL_DEBUG_INFO("4965ABGN HW Version %u.%u.%u\n",
2937                        ((hw_version >> 8) & 0x0F),
2938                        ((hw_version >> 8) >> 4), (hw_version & 0x00FF));
2939
2940         IWL_DEBUG_INFO("4965ABGN PBA Number %.16s\n",
2941                        priv->eeprom.board_pba_number_4965);
2942 }
2943
2944 #define IWL_TX_CRC_SIZE         4
2945 #define IWL_TX_DELIMITER_SIZE   4
2946
2947 /**
2948  * iwl4965_tx_queue_update_wr_ptr - Set up entry in Tx byte-count array
2949  */
2950 int iwl4965_tx_queue_update_wr_ptr(struct iwl4965_priv *priv,
2951                                    struct iwl4965_tx_queue *txq, u16 byte_cnt)
2952 {
2953         int len;
2954         int txq_id = txq->q.id;
2955         struct iwl4965_shared *shared_data = priv->hw_setting.shared_virt;
2956
2957         if (txq->need_update == 0)
2958                 return 0;
2959
2960         len = byte_cnt + IWL_TX_CRC_SIZE + IWL_TX_DELIMITER_SIZE;
2961
2962         /* Set up byte count within first 256 entries */
2963         IWL_SET_BITS16(shared_data->queues_byte_cnt_tbls[txq_id].
2964                        tfd_offset[txq->q.write_ptr], byte_cnt, len);
2965
2966         /* If within first 64 entries, duplicate at end */
2967         if (txq->q.write_ptr < IWL4965_MAX_WIN_SIZE)
2968                 IWL_SET_BITS16(shared_data->queues_byte_cnt_tbls[txq_id].
2969                         tfd_offset[IWL4965_QUEUE_SIZE + txq->q.write_ptr],
2970                         byte_cnt, len);
2971
2972         return 0;
2973 }
2974
2975 /**
2976  * iwl4965_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
2977  *
2978  * Selects how many and which Rx receivers/antennas/chains to use.
2979  * This should not be used for scan command ... it puts data in wrong place.
2980  */
2981 void iwl4965_set_rxon_chain(struct iwl4965_priv *priv)
2982 {
2983         u8 is_single = is_single_stream(priv);
2984         u8 idle_state, rx_state;
2985
2986         priv->staging_rxon.rx_chain = 0;
2987         rx_state = idle_state = 3;
2988
2989         /* Tell uCode which antennas are actually connected.
2990          * Before first association, we assume all antennas are connected.
2991          * Just after first association, iwl4965_noise_calibration()
2992          *    checks which antennas actually *are* connected. */
2993         priv->staging_rxon.rx_chain |=
2994             cpu_to_le16(priv->valid_antenna << RXON_RX_CHAIN_VALID_POS);
2995
2996         /* How many receivers should we use? */
2997         iwl4965_get_rx_chain_counter(priv, &idle_state, &rx_state);
2998         priv->staging_rxon.rx_chain |=
2999                 cpu_to_le16(rx_state << RXON_RX_CHAIN_MIMO_CNT_POS);
3000         priv->staging_rxon.rx_chain |=
3001                 cpu_to_le16(idle_state << RXON_RX_CHAIN_CNT_POS);
3002
3003         if (!is_single && (rx_state >= 2) &&
3004             !test_bit(STATUS_POWER_PMI, &priv->status))
3005                 priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
3006         else
3007                 priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
3008
3009         IWL_DEBUG_ASSOC("rx chain %X\n", priv->staging_rxon.rx_chain);
3010 }
3011
3012 /**
3013  * sign_extend - Sign extend a value using specified bit as sign-bit
3014  *
3015  * Example: sign_extend(9, 3) would return -7 as bit3 of 1001b is 1
3016  * and bit0..2 is 001b which when sign extended to 1111111111111001b is -7.
3017  *
3018  * @param oper value to sign extend
3019  * @param index 0 based bit index (0<=index<32) to sign bit
3020  */
3021 static s32 sign_extend(u32 oper, int index)
3022 {
3023         u8 shift = 31 - index;
3024
3025         return (s32)(oper << shift) >> shift;
3026 }
3027
3028 /**
3029  * iwl4965_get_temperature - return the calibrated temperature (in Kelvin)
3030  * @statistics: Provides the temperature reading from the uCode
3031  *
3032  * A return of <0 indicates bogus data in the statistics
3033  */
3034 int iwl4965_get_temperature(const struct iwl4965_priv *priv)
3035 {
3036         s32 temperature;
3037         s32 vt;
3038         s32 R1, R2, R3;
3039         u32 R4;
3040
3041         if (test_bit(STATUS_TEMPERATURE, &priv->status) &&
3042                 (priv->statistics.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK)) {
3043                 IWL_DEBUG_TEMP("Running FAT temperature calibration\n");
3044                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[1]);
3045                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[1]);
3046                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[1]);
3047                 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[1]);
3048         } else {
3049                 IWL_DEBUG_TEMP("Running temperature calibration\n");
3050                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[0]);
3051                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[0]);
3052                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[0]);
3053                 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[0]);
3054         }
3055
3056         /*
3057          * Temperature is only 23 bits, so sign extend out to 32.
3058          *
3059          * NOTE If we haven't received a statistics notification yet
3060          * with an updated temperature, use R4 provided to us in the
3061          * "initialize" ALIVE response.
3062          */
3063         if (!test_bit(STATUS_TEMPERATURE, &priv->status))
3064                 vt = sign_extend(R4, 23);
3065         else
3066                 vt = sign_extend(
3067                         le32_to_cpu(priv->statistics.general.temperature), 23);
3068
3069         IWL_DEBUG_TEMP("Calib values R[1-3]: %d %d %d R4: %d\n",
3070                        R1, R2, R3, vt);
3071
3072         if (R3 == R1) {
3073                 IWL_ERROR("Calibration conflict R1 == R3\n");
3074                 return -1;
3075         }
3076
3077         /* Calculate temperature in degrees Kelvin, adjust by 97%.
3078          * Add offset to center the adjustment around 0 degrees Centigrade. */
3079         temperature = TEMPERATURE_CALIB_A_VAL * (vt - R2);
3080         temperature /= (R3 - R1);
3081         temperature = (temperature * 97) / 100 +
3082             TEMPERATURE_CALIB_KELVIN_OFFSET;
3083
3084         IWL_DEBUG_TEMP("Calibrated temperature: %dK, %dC\n", temperature,
3085             KELVIN_TO_CELSIUS(temperature));
3086
3087         return temperature;
3088 }
3089
3090 /* Adjust Txpower only if temperature variance is greater than threshold. */
3091 #define IWL_TEMPERATURE_THRESHOLD   3
3092
3093 /**
3094  * iwl4965_is_temp_calib_needed - determines if new calibration is needed
3095  *
3096  * If the temperature changed has changed sufficiently, then a recalibration
3097  * is needed.
3098  *
3099  * Assumes caller will replace priv->last_temperature once calibration
3100  * executed.
3101  */
3102 static int iwl4965_is_temp_calib_needed(struct iwl4965_priv *priv)
3103 {
3104         int temp_diff;
3105
3106         if (!test_bit(STATUS_STATISTICS, &priv->status)) {
3107                 IWL_DEBUG_TEMP("Temperature not updated -- no statistics.\n");
3108                 return 0;
3109         }
3110
3111         temp_diff = priv->temperature - priv->last_temperature;
3112
3113         /* get absolute value */
3114         if (temp_diff < 0) {
3115                 IWL_DEBUG_POWER("Getting cooler, delta %d, \n", temp_diff);
3116                 temp_diff = -temp_diff;
3117         } else if (temp_diff == 0)
3118                 IWL_DEBUG_POWER("Same temp, \n");
3119         else
3120                 IWL_DEBUG_POWER("Getting warmer, delta %d, \n", temp_diff);
3121
3122         if (temp_diff < IWL_TEMPERATURE_THRESHOLD) {
3123                 IWL_DEBUG_POWER("Thermal txpower calib not needed\n");
3124                 return 0;
3125         }
3126
3127         IWL_DEBUG_POWER("Thermal txpower calib needed\n");
3128
3129         return 1;
3130 }
3131
3132 /* Calculate noise level, based on measurements during network silence just
3133  *   before arriving beacon.  This measurement can be done only if we know
3134  *   exactly when to expect beacons, therefore only when we're associated. */
3135 static void iwl4965_rx_calc_noise(struct iwl4965_priv *priv)
3136 {
3137         struct statistics_rx_non_phy *rx_info
3138                                 = &(priv->statistics.rx.general);
3139         int num_active_rx = 0;
3140         int total_silence = 0;
3141         int bcn_silence_a =
3142                 le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER;
3143         int bcn_silence_b =
3144                 le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER;
3145         int bcn_silence_c =
3146                 le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER;
3147
3148         if (bcn_silence_a) {
3149                 total_silence += bcn_silence_a;
3150                 num_active_rx++;
3151         }
3152         if (bcn_silence_b) {
3153                 total_silence += bcn_silence_b;
3154                 num_active_rx++;
3155         }
3156         if (bcn_silence_c) {
3157                 total_silence += bcn_silence_c;
3158                 num_active_rx++;
3159         }
3160
3161         /* Average among active antennas */
3162         if (num_active_rx)
3163                 priv->last_rx_noise = (total_silence / num_active_rx) - 107;
3164         else
3165                 priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
3166
3167         IWL_DEBUG_CALIB("inband silence a %u, b %u, c %u, dBm %d\n",
3168                         bcn_silence_a, bcn_silence_b, bcn_silence_c,
3169                         priv->last_rx_noise);
3170 }
3171
3172 void iwl4965_hw_rx_statistics(struct iwl4965_priv *priv, struct iwl4965_rx_mem_buffer *rxb)
3173 {
3174         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3175         int change;
3176         s32 temp;
3177
3178         IWL_DEBUG_RX("Statistics notification received (%d vs %d).\n",
3179                      (int)sizeof(priv->statistics), pkt->len);
3180
3181         change = ((priv->statistics.general.temperature !=
3182                    pkt->u.stats.general.temperature) ||
3183                   ((priv->statistics.flag &
3184                     STATISTICS_REPLY_FLG_FAT_MODE_MSK) !=
3185                    (pkt->u.stats.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK)));
3186
3187         memcpy(&priv->statistics, &pkt->u.stats, sizeof(priv->statistics));
3188
3189         set_bit(STATUS_STATISTICS, &priv->status);
3190
3191         /* Reschedule the statistics timer to occur in
3192          * REG_RECALIB_PERIOD seconds to ensure we get a
3193          * thermal update even if the uCode doesn't give
3194          * us one */
3195         mod_timer(&priv->statistics_periodic, jiffies +
3196                   msecs_to_jiffies(REG_RECALIB_PERIOD * 1000));
3197
3198         if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
3199             (pkt->hdr.cmd == STATISTICS_NOTIFICATION)) {
3200                 iwl4965_rx_calc_noise(priv);
3201 #ifdef CONFIG_IWL4965_SENSITIVITY
3202                 queue_work(priv->workqueue, &priv->sensitivity_work);
3203 #endif
3204         }
3205
3206         /* If the hardware hasn't reported a change in
3207          * temperature then don't bother computing a
3208          * calibrated temperature value */
3209         if (!change)
3210                 return;
3211
3212         temp = iwl4965_get_temperature(priv);
3213         if (temp < 0)
3214                 return;
3215
3216         if (priv->temperature != temp) {
3217                 if (priv->temperature)
3218                         IWL_DEBUG_TEMP("Temperature changed "
3219                                        "from %dC to %dC\n",
3220                                        KELVIN_TO_CELSIUS(priv->temperature),
3221                                        KELVIN_TO_CELSIUS(temp));
3222                 else
3223                         IWL_DEBUG_TEMP("Temperature "
3224                                        "initialized to %dC\n",
3225                                        KELVIN_TO_CELSIUS(temp));
3226         }
3227
3228         priv->temperature = temp;
3229         set_bit(STATUS_TEMPERATURE, &priv->status);
3230
3231         if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
3232                      iwl4965_is_temp_calib_needed(priv))
3233                 queue_work(priv->workqueue, &priv->txpower_work);
3234 }
3235
3236 static void iwl4965_add_radiotap(struct iwl4965_priv *priv,
3237                                  struct sk_buff *skb,
3238                                  struct iwl4965_rx_phy_res *rx_start,
3239                                  struct ieee80211_rx_status *stats,
3240                                  u32 ampdu_status)
3241 {
3242         s8 signal = stats->ssi;
3243         s8 noise = 0;
3244         int rate = stats->rate_idx;
3245         u64 tsf = stats->mactime;
3246         __le16 phy_flags_hw = rx_start->phy_flags;
3247         struct iwl4965_rt_rx_hdr {
3248                 struct ieee80211_radiotap_header rt_hdr;
3249                 __le64 rt_tsf;          /* TSF */
3250                 u8 rt_flags;            /* radiotap packet flags */
3251                 u8 rt_rate;             /* rate in 500kb/s */
3252                 __le16 rt_channelMHz;   /* channel in MHz */
3253                 __le16 rt_chbitmask;    /* channel bitfield */
3254                 s8 rt_dbmsignal;        /* signal in dBm, kluged to signed */
3255                 s8 rt_dbmnoise;
3256                 u8 rt_antenna;          /* antenna number */
3257         } __attribute__ ((packed)) *iwl4965_rt;
3258
3259         /* TODO: We won't have enough headroom for HT frames. Fix it later. */
3260         if (skb_headroom(skb) < sizeof(*iwl4965_rt)) {
3261                 if (net_ratelimit())
3262                         printk(KERN_ERR "not enough headroom [%d] for "
3263                                "radiotap head [%zd]\n",
3264                                skb_headroom(skb), sizeof(*iwl4965_rt));
3265                 return;
3266         }
3267
3268         /* put radiotap header in front of 802.11 header and data */
3269         iwl4965_rt = (void *)skb_push(skb, sizeof(*iwl4965_rt));
3270
3271         /* initialise radiotap header */
3272         iwl4965_rt->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
3273         iwl4965_rt->rt_hdr.it_pad = 0;
3274
3275         /* total header + data */
3276         put_unaligned(cpu_to_le16(sizeof(*iwl4965_rt)),
3277                       &iwl4965_rt->rt_hdr.it_len);
3278
3279         /* Indicate all the fields we add to the radiotap header */
3280         put_unaligned(cpu_to_le32((1 << IEEE80211_RADIOTAP_TSFT) |
3281                                   (1 << IEEE80211_RADIOTAP_FLAGS) |
3282                                   (1 << IEEE80211_RADIOTAP_RATE) |
3283                                   (1 << IEEE80211_RADIOTAP_CHANNEL) |
3284                                   (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL) |
3285                                   (1 << IEEE80211_RADIOTAP_DBM_ANTNOISE) |
3286                                   (1 << IEEE80211_RADIOTAP_ANTENNA)),
3287                       &iwl4965_rt->rt_hdr.it_present);
3288
3289         /* Zero the flags, we'll add to them as we go */
3290         iwl4965_rt->rt_flags = 0;
3291
3292         put_unaligned(cpu_to_le64(tsf), &iwl4965_rt->rt_tsf);
3293
3294         iwl4965_rt->rt_dbmsignal = signal;
3295         iwl4965_rt->rt_dbmnoise = noise;
3296
3297         /* Convert the channel frequency and set the flags */
3298         put_unaligned(cpu_to_le16(stats->freq), &iwl4965_rt->rt_channelMHz);
3299         if (!(phy_flags_hw & RX_RES_PHY_FLAGS_BAND_24_MSK))
3300                 put_unaligned(cpu_to_le16(IEEE80211_CHAN_OFDM |
3301                                           IEEE80211_CHAN_5GHZ),
3302                               &iwl4965_rt->rt_chbitmask);
3303         else if (phy_flags_hw & RX_RES_PHY_FLAGS_MOD_CCK_MSK)
3304                 put_unaligned(cpu_to_le16(IEEE80211_CHAN_CCK |
3305                                           IEEE80211_CHAN_2GHZ),
3306                               &iwl4965_rt->rt_chbitmask);
3307         else    /* 802.11g */
3308                 put_unaligned(cpu_to_le16(IEEE80211_CHAN_OFDM |
3309                                           IEEE80211_CHAN_2GHZ),
3310                               &iwl4965_rt->rt_chbitmask);
3311
3312         if (rate == -1)
3313                 iwl4965_rt->rt_rate = 0;
3314         else
3315                 iwl4965_rt->rt_rate = iwl4965_rates[rate].ieee;
3316
3317         /*
3318          * "antenna number"
3319          *
3320          * It seems that the antenna field in the phy flags value
3321          * is actually a bitfield. This is undefined by radiotap,
3322          * it wants an actual antenna number but I always get "7"
3323          * for most legacy frames I receive indicating that the
3324          * same frame was received on all three RX chains.
3325          *
3326          * I think this field should be removed in favour of a
3327          * new 802.11n radiotap field "RX chains" that is defined
3328          * as a bitmask.
3329          */
3330         iwl4965_rt->rt_antenna =
3331                 le16_to_cpu(phy_flags_hw & RX_RES_PHY_FLAGS_ANTENNA_MSK) >> 4;
3332
3333         /* set the preamble flag if appropriate */
3334         if (phy_flags_hw & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
3335                 iwl4965_rt->rt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;
3336
3337         stats->flag |= RX_FLAG_RADIOTAP;
3338 }
3339
3340 static void iwl4965_handle_data_packet(struct iwl4965_priv *priv, int is_data,
3341                                        int include_phy,
3342                                        struct iwl4965_rx_mem_buffer *rxb,
3343                                        struct ieee80211_rx_status *stats)
3344 {
3345         struct iwl4965_rx_packet *pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
3346         struct iwl4965_rx_phy_res *rx_start = (include_phy) ?
3347             (struct iwl4965_rx_phy_res *)&(pkt->u.raw[0]) : NULL;
3348         struct ieee80211_hdr *hdr;
3349         u16 len;
3350         __le32 *rx_end;
3351         unsigned int skblen;
3352         u32 ampdu_status;
3353
3354         if (!include_phy && priv->last_phy_res[0])
3355                 rx_start = (struct iwl4965_rx_phy_res *)&priv->last_phy_res[1];
3356
3357         if (!rx_start) {
3358                 IWL_ERROR("MPDU frame without a PHY data\n");
3359                 return;
3360         }
3361         if (include_phy) {
3362                 hdr = (struct ieee80211_hdr *)((u8 *) & rx_start[1] +
3363                                                rx_start->cfg_phy_cnt);
3364
3365                 len = le16_to_cpu(rx_start->byte_count);
3366
3367                 rx_end = (__le32 *) ((u8 *) & pkt->u.raw[0] +
3368                                   sizeof(struct iwl4965_rx_phy_res) +
3369                                   rx_start->cfg_phy_cnt + len);
3370
3371         } else {
3372                 struct iwl4965_rx_mpdu_res_start *amsdu =
3373                     (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw;
3374
3375                 hdr = (struct ieee80211_hdr *)(pkt->u.raw +
3376                                sizeof(struct iwl4965_rx_mpdu_res_start));
3377                 len =  le16_to_cpu(amsdu->byte_count);
3378                 rx_start->byte_count = amsdu->byte_count;
3379                 rx_end = (__le32 *) (((u8 *) hdr) + len);
3380         }
3381         if (len > priv->hw_setting.max_pkt_size || len < 16) {
3382                 IWL_WARNING("byte count out of range [16,4K] : %d\n", len);
3383                 return;
3384         }
3385
3386         ampdu_status = le32_to_cpu(*rx_end);
3387         skblen = ((u8 *) rx_end - (u8 *) & pkt->u.raw[0]) + sizeof(u32);
3388
3389         /* start from MAC */
3390         skb_reserve(rxb->skb, (void *)hdr - (void *)pkt);
3391         skb_put(rxb->skb, len); /* end where data ends */
3392
3393         /* We only process data packets if the interface is open */
3394         if (unlikely(!priv->is_open)) {
3395                 IWL_DEBUG_DROP_LIMIT
3396                     ("Dropping packet while interface is not open.\n");
3397                 return;
3398         }
3399
3400         stats->flag = 0;
3401         hdr = (struct ieee80211_hdr *)rxb->skb->data;
3402
3403         if (iwl4965_param_hwcrypto)
3404                 iwl4965_set_decrypted_flag(priv, rxb->skb, ampdu_status, stats);
3405
3406         if (priv->add_radiotap)
3407                 iwl4965_add_radiotap(priv, rxb->skb, rx_start, stats, ampdu_status);
3408
3409         ieee80211_rx_irqsafe(priv->hw, rxb->skb, stats);
3410         priv->alloc_rxb_skb--;
3411         rxb->skb = NULL;
3412 #ifdef LED
3413         priv->led_packets += len;
3414         iwl4965_setup_activity_timer(priv);
3415 #endif
3416 }
3417
3418 /* Calc max signal level (dBm) among 3 possible receivers */
3419 static int iwl4965_calc_rssi(struct iwl4965_rx_phy_res *rx_resp)
3420 {
3421         /* data from PHY/DSP regarding signal strength, etc.,
3422          *   contents are always there, not configurable by host.  */
3423         struct iwl4965_rx_non_cfg_phy *ncphy =
3424             (struct iwl4965_rx_non_cfg_phy *)rx_resp->non_cfg_phy;
3425         u32 agc = (le16_to_cpu(ncphy->agc_info) & IWL_AGC_DB_MASK)
3426                         >> IWL_AGC_DB_POS;
3427
3428         u32 valid_antennae =
3429             (le16_to_cpu(rx_resp->phy_flags) & RX_PHY_FLAGS_ANTENNAE_MASK)
3430                         >> RX_PHY_FLAGS_ANTENNAE_OFFSET;
3431         u8 max_rssi = 0;
3432         u32 i;
3433
3434         /* Find max rssi among 3 possible receivers.
3435          * These values are measured by the digital signal processor (DSP).
3436          * They should stay fairly constant even as the signal strength varies,
3437          *   if the radio's automatic gain control (AGC) is working right.
3438          * AGC value (see below) will provide the "interesting" info. */
3439         for (i = 0; i < 3; i++)
3440                 if (valid_antennae & (1 << i))
3441                         max_rssi = max(ncphy->rssi_info[i << 1], max_rssi);
3442
3443         IWL_DEBUG_STATS("Rssi In A %d B %d C %d Max %d AGC dB %d\n",
3444                 ncphy->rssi_info[0], ncphy->rssi_info[2], ncphy->rssi_info[4],
3445                 max_rssi, agc);
3446
3447         /* dBm = max_rssi dB - agc dB - constant.
3448          * Higher AGC (higher radio gain) means lower signal. */
3449         return (max_rssi - agc - IWL_RSSI_OFFSET);
3450 }
3451
3452 #ifdef CONFIG_IWL4965_HT
3453
3454 /* Parsed Information Elements */
3455 struct ieee802_11_elems {
3456         u8 *ds_params;
3457         u8 ds_params_len;
3458         u8 *tim;
3459         u8 tim_len;
3460         u8 *ibss_params;
3461         u8 ibss_params_len;
3462         u8 *erp_info;
3463         u8 erp_info_len;
3464         u8 *ht_cap_param;
3465         u8 ht_cap_param_len;
3466         u8 *ht_extra_param;
3467         u8 ht_extra_param_len;
3468 };
3469
3470 static int parse_elems(u8 *start, size_t len, struct ieee802_11_elems *elems)
3471 {
3472         size_t left = len;
3473         u8 *pos = start;
3474         int unknown = 0;
3475
3476         memset(elems, 0, sizeof(*elems));
3477
3478         while (left >= 2) {
3479                 u8 id, elen;
3480
3481                 id = *pos++;
3482                 elen = *pos++;
3483                 left -= 2;
3484
3485                 if (elen > left)
3486                         return -1;
3487
3488                 switch (id) {
3489                 case WLAN_EID_DS_PARAMS:
3490                         elems->ds_params = pos;
3491                         elems->ds_params_len = elen;
3492                         break;
3493                 case WLAN_EID_TIM:
3494                         elems->tim = pos;
3495                         elems->tim_len = elen;
3496                         break;
3497                 case WLAN_EID_IBSS_PARAMS:
3498                         elems->ibss_params = pos;
3499                         elems->ibss_params_len = elen;
3500                         break;
3501                 case WLAN_EID_ERP_INFO:
3502                         elems->erp_info = pos;
3503                         elems->erp_info_len = elen;
3504                         break;
3505                 case WLAN_EID_HT_CAPABILITY:
3506                         elems->ht_cap_param = pos;
3507                         elems->ht_cap_param_len = elen;
3508                         break;
3509                 case WLAN_EID_HT_EXTRA_INFO:
3510                         elems->ht_extra_param = pos;
3511                         elems->ht_extra_param_len = elen;
3512                         break;
3513                 default:
3514                         unknown++;
3515                         break;
3516                 }
3517
3518                 left -= elen;
3519                 pos += elen;
3520         }
3521
3522         return 0;
3523 }
3524
3525 void iwl4965_init_ht_hw_capab(struct ieee80211_ht_info *ht_info,
3526                               enum ieee80211_band band)
3527 {
3528         ht_info->cap = 0;
3529         memset(ht_info->supp_mcs_set, 0, 16);
3530
3531         ht_info->ht_supported = 1;
3532
3533         if (band == IEEE80211_BAND_5GHZ) {
3534                 ht_info->cap |= (u16)IEEE80211_HT_CAP_SUP_WIDTH;
3535                 ht_info->cap |= (u16)IEEE80211_HT_CAP_SGI_40;
3536                 ht_info->supp_mcs_set[4] = 0x01;
3537         }
3538         ht_info->cap |= (u16)IEEE80211_HT_CAP_GRN_FLD;
3539         ht_info->cap |= (u16)IEEE80211_HT_CAP_SGI_20;
3540         ht_info->cap |= (u16)(IEEE80211_HT_CAP_MIMO_PS &
3541                              (IWL_MIMO_PS_NONE << 2));
3542         if (iwl4965_param_amsdu_size_8K) {
3543                 printk(KERN_DEBUG "iwl4965 in A-MSDU 8K support mode\n");
3544                 ht_info->cap |= (u16)IEEE80211_HT_CAP_MAX_AMSDU;
3545         }
3546
3547         ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
3548         ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
3549
3550         ht_info->supp_mcs_set[0] = 0xFF;
3551         ht_info->supp_mcs_set[1] = 0xFF;
3552 }
3553 #endif /* CONFIG_IWL4965_HT */
3554
3555 static void iwl4965_sta_modify_ps_wake(struct iwl4965_priv *priv, int sta_id)
3556 {
3557         unsigned long flags;
3558
3559         spin_lock_irqsave(&priv->sta_lock, flags);
3560         priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
3561         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
3562         priv->stations[sta_id].sta.sta.modify_mask = 0;
3563         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3564         spin_unlock_irqrestore(&priv->sta_lock, flags);
3565
3566         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
3567 }
3568
3569 static void iwl4965_update_ps_mode(struct iwl4965_priv *priv, u16 ps_bit, u8 *addr)
3570 {
3571         /* FIXME: need locking over ps_status ??? */
3572         u8 sta_id = iwl4965_hw_find_station(priv, addr);
3573
3574         if (sta_id != IWL_INVALID_STATION) {
3575                 u8 sta_awake = priv->stations[sta_id].
3576                                 ps_status == STA_PS_STATUS_WAKE;
3577
3578                 if (sta_awake && ps_bit)
3579                         priv->stations[sta_id].ps_status = STA_PS_STATUS_SLEEP;
3580                 else if (!sta_awake && !ps_bit) {
3581                         iwl4965_sta_modify_ps_wake(priv, sta_id);
3582                         priv->stations[sta_id].ps_status = STA_PS_STATUS_WAKE;
3583                 }
3584         }
3585 }
3586 #ifdef CONFIG_IWL4965_DEBUG
3587
3588 /**
3589  * iwl4965_dbg_report_frame - dump frame to syslog during debug sessions
3590  *
3591  * You may hack this function to show different aspects of received frames,
3592  * including selective frame dumps.
3593  * group100 parameter selects whether to show 1 out of 100 good frames.
3594  *
3595  * TODO:  This was originally written for 3945, need to audit for
3596  *        proper operation with 4965.
3597  */
3598 static void iwl4965_dbg_report_frame(struct iwl4965_priv *priv,
3599                       struct iwl4965_rx_packet *pkt,
3600                       struct ieee80211_hdr *header, int group100)
3601 {
3602         u32 to_us;
3603         u32 print_summary = 0;
3604         u32 print_dump = 0;     /* set to 1 to dump all frames' contents */
3605         u32 hundred = 0;
3606         u32 dataframe = 0;
3607         u16 fc;
3608         u16 seq_ctl;
3609         u16 channel;
3610         u16 phy_flags;
3611         int rate_sym;
3612         u16 length;
3613         u16 status;
3614         u16 bcn_tmr;
3615         u32 tsf_low;
3616         u64 tsf;
3617         u8 rssi;
3618         u8 agc;
3619         u16 sig_avg;
3620         u16 noise_diff;
3621         struct iwl4965_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
3622         struct iwl4965_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
3623         struct iwl4965_rx_frame_end *rx_end = IWL_RX_END(pkt);
3624         u8 *data = IWL_RX_DATA(pkt);
3625
3626         if (likely(!(iwl4965_debug_level & IWL_DL_RX)))
3627                 return;
3628
3629         /* MAC header */
3630         fc = le16_to_cpu(header->frame_control);
3631         seq_ctl = le16_to_cpu(header->seq_ctrl);
3632
3633         /* metadata */
3634         channel = le16_to_cpu(rx_hdr->channel);
3635         phy_flags = le16_to_cpu(rx_hdr->phy_flags);
3636         rate_sym = rx_hdr->rate;
3637         length = le16_to_cpu(rx_hdr->len);
3638
3639         /* end-of-frame status and timestamp */
3640         status = le32_to_cpu(rx_end->status);
3641         bcn_tmr = le32_to_cpu(rx_end->beacon_timestamp);
3642         tsf_low = le64_to_cpu(rx_end->timestamp) & 0x0ffffffff;
3643         tsf = le64_to_cpu(rx_end->timestamp);
3644
3645         /* signal statistics */
3646         rssi = rx_stats->rssi;
3647         agc = rx_stats->agc;
3648         sig_avg = le16_to_cpu(rx_stats->sig_avg);
3649         noise_diff = le16_to_cpu(rx_stats->noise_diff);
3650
3651         to_us = !compare_ether_addr(header->addr1, priv->mac_addr);
3652
3653         /* if data frame is to us and all is good,
3654          *   (optionally) print summary for only 1 out of every 100 */
3655         if (to_us && (fc & ~IEEE80211_FCTL_PROTECTED) ==
3656             (IEEE80211_FCTL_FROMDS | IEEE80211_FTYPE_DATA)) {
3657                 dataframe = 1;
3658                 if (!group100)
3659                         print_summary = 1;      /* print each frame */
3660                 else if (priv->framecnt_to_us < 100) {
3661                         priv->framecnt_to_us++;
3662                         print_summary = 0;
3663                 } else {
3664                         priv->framecnt_to_us = 0;
3665                         print_summary = 1;
3666                         hundred = 1;
3667                 }
3668         } else {
3669                 /* print summary for all other frames */
3670                 print_summary = 1;
3671         }
3672
3673         if (print_summary) {
3674                 char *title;
3675                 int rate_idx;
3676                 u32 bitrate;
3677
3678                 if (hundred)
3679                         title = "100Frames";
3680                 else if (fc & IEEE80211_FCTL_RETRY)
3681                         title = "Retry";
3682                 else if (ieee80211_is_assoc_response(fc))
3683                         title = "AscRsp";
3684                 else if (ieee80211_is_reassoc_response(fc))
3685                         title = "RasRsp";
3686                 else if (ieee80211_is_probe_response(fc)) {
3687                         title = "PrbRsp";
3688                         print_dump = 1; /* dump frame contents */
3689                 } else if (ieee80211_is_beacon(fc)) {
3690                         title = "Beacon";
3691                         print_dump = 1; /* dump frame contents */
3692                 } else if (ieee80211_is_atim(fc))
3693                         title = "ATIM";
3694                 else if (ieee80211_is_auth(fc))
3695                         title = "Auth";
3696                 else if (ieee80211_is_deauth(fc))
3697                         title = "DeAuth";
3698                 else if (ieee80211_is_disassoc(fc))
3699                         title = "DisAssoc";
3700                 else
3701                         title = "Frame";
3702
3703                 rate_idx = iwl4965_hwrate_to_plcp_idx(rate_sym);
3704                 if (unlikely(rate_idx == -1))
3705                         bitrate = 0;
3706                 else
3707                         bitrate = iwl4965_rates[rate_idx].ieee / 2;
3708
3709                 /* print frame summary.
3710                  * MAC addresses show just the last byte (for brevity),
3711                  *    but you can hack it to show more, if you'd like to. */
3712                 if (dataframe)
3713                         IWL_DEBUG_RX("%s: mhd=0x%04x, dst=0x%02x, "
3714                                      "len=%u, rssi=%d, chnl=%d, rate=%u, \n",
3715                                      title, fc, header->addr1[5],
3716                                      length, rssi, channel, bitrate);
3717                 else {
3718                         /* src/dst addresses assume managed mode */
3719                         IWL_DEBUG_RX("%s: 0x%04x, dst=0x%02x, "
3720                                      "src=0x%02x, rssi=%u, tim=%lu usec, "
3721                                      "phy=0x%02x, chnl=%d\n",
3722                                      title, fc, header->addr1[5],
3723                                      header->addr3[5], rssi,
3724                                      tsf_low - priv->scan_start_tsf,
3725                                      phy_flags, channel);
3726                 }
3727         }
3728         if (print_dump)
3729                 iwl4965_print_hex_dump(IWL_DL_RX, data, length);
3730 }
3731 #else
3732 static inline void iwl4965_dbg_report_frame(struct iwl4965_priv *priv,
3733                                             struct iwl4965_rx_packet *pkt,
3734                                             struct ieee80211_hdr *header,
3735                                             int group100)
3736 {
3737 }
3738 #endif
3739
3740
3741 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
3742
3743 /* Called for REPLY_4965_RX (legacy ABG frames), or
3744  * REPLY_RX_MPDU_CMD (HT high-throughput N frames). */
3745 static void iwl4965_rx_reply_rx(struct iwl4965_priv *priv,
3746                                 struct iwl4965_rx_mem_buffer *rxb)
3747 {
3748         struct ieee80211_hdr *header;
3749         struct ieee80211_rx_status rx_status;
3750         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3751         /* Use phy data (Rx signal strength, etc.) contained within
3752          *   this rx packet for legacy frames,
3753          *   or phy data cached from REPLY_RX_PHY_CMD for HT frames. */
3754         int include_phy = (pkt->hdr.cmd == REPLY_4965_RX);
3755         struct iwl4965_rx_phy_res *rx_start = (include_phy) ?
3756                 (struct iwl4965_rx_phy_res *)&(pkt->u.raw[0]) :
3757                 (struct iwl4965_rx_phy_res *)&priv->last_phy_res[1];
3758         __le32 *rx_end;
3759         unsigned int len = 0;
3760         u16 fc;
3761         u8 network_packet;
3762
3763         rx_status.mactime = le64_to_cpu(rx_start->timestamp);
3764         rx_status.freq = ieee80211chan2mhz(le16_to_cpu(rx_start->channel));
3765         rx_status.band = (rx_start->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ?
3766                                 IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
3767         rx_status.rate_idx = iwl4965_hwrate_to_plcp_idx(
3768                                         le32_to_cpu(rx_start->rate_n_flags));
3769
3770         if (rx_status.band == IEEE80211_BAND_5GHZ)
3771                 rx_status.rate_idx -= IWL_FIRST_OFDM_RATE;
3772
3773         rx_status.antenna = 0;
3774         rx_status.flag = 0;
3775
3776         if ((unlikely(rx_start->cfg_phy_cnt > 20))) {
3777                 IWL_DEBUG_DROP
3778                         ("dsp size out of range [0,20]: "
3779                          "%d/n", rx_start->cfg_phy_cnt);
3780                 return;
3781         }
3782
3783         if (!include_phy) {
3784                 if (priv->last_phy_res[0])
3785                         rx_start = (struct iwl4965_rx_phy_res *)
3786                                 &priv->last_phy_res[1];
3787                 else
3788                         rx_start = NULL;
3789         }
3790
3791         if (!rx_start) {
3792                 IWL_ERROR("MPDU frame without a PHY data\n");
3793                 return;
3794         }
3795
3796         if (include_phy) {
3797                 header = (struct ieee80211_hdr *)((u8 *) & rx_start[1]
3798                                                   + rx_start->cfg_phy_cnt);
3799
3800                 len = le16_to_cpu(rx_start->byte_count);
3801                 rx_end = (__le32 *)(pkt->u.raw + rx_start->cfg_phy_cnt +
3802                                   sizeof(struct iwl4965_rx_phy_res) + len);
3803         } else {
3804                 struct iwl4965_rx_mpdu_res_start *amsdu =
3805                         (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw;
3806
3807                 header = (void *)(pkt->u.raw +
3808                         sizeof(struct iwl4965_rx_mpdu_res_start));
3809                 len = le16_to_cpu(amsdu->byte_count);
3810                 rx_end = (__le32 *) (pkt->u.raw +
3811                         sizeof(struct iwl4965_rx_mpdu_res_start) + len);
3812         }
3813
3814         if (!(*rx_end & RX_RES_STATUS_NO_CRC32_ERROR) ||
3815             !(*rx_end & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
3816                 IWL_DEBUG_RX("Bad CRC or FIFO: 0x%08X.\n",
3817                                 le32_to_cpu(*rx_end));
3818                 return;
3819         }
3820
3821         priv->ucode_beacon_time = le32_to_cpu(rx_start->beacon_time_stamp);
3822
3823         /* Find max signal strength (dBm) among 3 antenna/receiver chains */
3824         rx_status.ssi = iwl4965_calc_rssi(rx_start);
3825
3826         /* Meaningful noise values are available only from beacon statistics,
3827          *   which are gathered only when associated, and indicate noise
3828          *   only for the associated network channel ...
3829          * Ignore these noise values while scanning (other channels) */
3830         if (iwl4965_is_associated(priv) &&
3831             !test_bit(STATUS_SCANNING, &priv->status)) {
3832                 rx_status.noise = priv->last_rx_noise;
3833                 rx_status.signal = iwl4965_calc_sig_qual(rx_status.ssi,
3834                                                          rx_status.noise);
3835         } else {
3836                 rx_status.noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
3837                 rx_status.signal = iwl4965_calc_sig_qual(rx_status.ssi, 0);
3838         }
3839
3840         /* Reset beacon noise level if not associated. */
3841         if (!iwl4965_is_associated(priv))
3842                 priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
3843
3844         /* Set "1" to report good data frames in groups of 100 */
3845         /* FIXME: need to optimze the call: */
3846         iwl4965_dbg_report_frame(priv, pkt, header, 1);
3847
3848         IWL_DEBUG_STATS_LIMIT("Rssi %d, noise %d, qual %d, TSF %llu\n",
3849                               rx_status.ssi, rx_status.noise, rx_status.signal,
3850                               rx_status.mactime);
3851
3852         network_packet = iwl4965_is_network_packet(priv, header);
3853         if (network_packet) {
3854                 priv->last_rx_rssi = rx_status.ssi;
3855                 priv->last_beacon_time =  priv->ucode_beacon_time;
3856                 priv->last_tsf = le64_to_cpu(rx_start->timestamp);
3857         }
3858
3859         fc = le16_to_cpu(header->frame_control);
3860         switch (fc & IEEE80211_FCTL_FTYPE) {
3861         case IEEE80211_FTYPE_MGMT:
3862
3863                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
3864                         iwl4965_update_ps_mode(priv, fc  & IEEE80211_FCTL_PM,
3865                                                 header->addr2);
3866                 switch (fc & IEEE80211_FCTL_STYPE) {
3867                 case IEEE80211_STYPE_PROBE_RESP:
3868                 case IEEE80211_STYPE_BEACON:
3869                         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA &&
3870                              !compare_ether_addr(header->addr2, priv->bssid)) ||
3871                             (priv->iw_mode == IEEE80211_IF_TYPE_IBSS &&
3872                              !compare_ether_addr(header->addr3, priv->bssid))) {
3873                                 struct ieee80211_mgmt *mgmt =
3874                                         (struct ieee80211_mgmt *)header;
3875                                 u64 timestamp =
3876                                         le64_to_cpu(mgmt->u.beacon.timestamp);
3877
3878                                 priv->timestamp0 = timestamp & 0xFFFFFFFF;
3879                                 priv->timestamp1 =
3880                                         (timestamp >> 32) & 0xFFFFFFFF;
3881                                 priv->beacon_int = le16_to_cpu(
3882                                     mgmt->u.beacon.beacon_int);
3883                                 if (priv->call_post_assoc_from_beacon &&
3884                                     (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
3885                                         priv->call_post_assoc_from_beacon = 0;
3886                                         queue_work(priv->workqueue,
3887                                             &priv->post_associate.work);
3888                                 }
3889                         }
3890                         break;
3891
3892                 case IEEE80211_STYPE_ACTION:
3893                         break;
3894
3895                         /*
3896                          * TODO: Use the new callback function from
3897                          * mac80211 instead of sniffing these packets.
3898                          */
3899                 case IEEE80211_STYPE_ASSOC_RESP:
3900                 case IEEE80211_STYPE_REASSOC_RESP:
3901                         if (network_packet) {
3902 #ifdef CONFIG_IWL4965_HT
3903                                 u8 *pos = NULL;
3904                                 struct ieee802_11_elems elems;
3905 #endif                          /*CONFIG_IWL4965_HT */
3906                                 struct ieee80211_mgmt *mgnt =
3907                                         (struct ieee80211_mgmt *)header;
3908
3909                                 /* We have just associated, give some
3910                                  * time for the 4-way handshake if
3911                                  * any. Don't start scan too early. */
3912                                 priv->next_scan_jiffies = jiffies +
3913                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
3914
3915                                 priv->assoc_id = (~((1 << 15) | (1 << 14))
3916                                         & le16_to_cpu(mgnt->u.assoc_resp.aid));
3917                                 priv->assoc_capability =
3918                                         le16_to_cpu(
3919                                                 mgnt->u.assoc_resp.capab_info);
3920 #ifdef CONFIG_IWL4965_HT
3921                                 pos = mgnt->u.assoc_resp.variable;
3922                                 if (!parse_elems(pos,
3923                                                  len - (pos - (u8 *) mgnt),
3924                                                  &elems)) {
3925                                         if (elems.ht_extra_param &&
3926                                             elems.ht_cap_param)
3927                                                 break;
3928                                 }
3929 #endif                          /*CONFIG_IWL4965_HT */
3930                                 /* assoc_id is 0 no association */
3931                                 if (!priv->assoc_id)
3932                                         break;
3933                                 if (priv->beacon_int)
3934                                         queue_work(priv->workqueue,
3935                                             &priv->post_associate.work);
3936                                 else
3937                                         priv->call_post_assoc_from_beacon = 1;
3938                         }
3939
3940                         break;
3941
3942                 case IEEE80211_STYPE_PROBE_REQ:
3943                         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
3944                             !iwl4965_is_associated(priv)) {
3945                                 DECLARE_MAC_BUF(mac1);
3946                                 DECLARE_MAC_BUF(mac2);
3947                                 DECLARE_MAC_BUF(mac3);
3948
3949                                 IWL_DEBUG_DROP("Dropping (non network): "
3950                                                "%s, %s, %s\n",
3951                                                print_mac(mac1, header->addr1),
3952                                                print_mac(mac2, header->addr2),
3953                                                print_mac(mac3, header->addr3));
3954                                 return;
3955                         }
3956                 }
3957                 iwl4965_handle_data_packet(priv, 0, include_phy, rxb, &rx_status);
3958                 break;
3959
3960         case IEEE80211_FTYPE_CTL:
3961 #ifdef CONFIG_IWL4965_HT
3962                 switch (fc & IEEE80211_FCTL_STYPE) {
3963                 case IEEE80211_STYPE_BACK_REQ:
3964                         IWL_DEBUG_HT("IEEE80211_STYPE_BACK_REQ arrived\n");
3965                         iwl4965_handle_data_packet(priv, 0, include_phy,
3966                                                 rxb, &rx_status);
3967                         break;
3968                 default:
3969                         break;
3970                 }
3971 #endif
3972                 break;
3973
3974         case IEEE80211_FTYPE_DATA: {
3975                 DECLARE_MAC_BUF(mac1);
3976                 DECLARE_MAC_BUF(mac2);
3977                 DECLARE_MAC_BUF(mac3);
3978
3979                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
3980                         iwl4965_update_ps_mode(priv, fc  & IEEE80211_FCTL_PM,
3981                                                 header->addr2);
3982
3983                 if (unlikely(!network_packet))
3984                         IWL_DEBUG_DROP("Dropping (non network): "
3985                                        "%s, %s, %s\n",
3986                                        print_mac(mac1, header->addr1),
3987                                        print_mac(mac2, header->addr2),
3988                                        print_mac(mac3, header->addr3));
3989                 else if (unlikely(iwl4965_is_duplicate_packet(priv, header)))
3990                         IWL_DEBUG_DROP("Dropping (dup): %s, %s, %s\n",
3991                                        print_mac(mac1, header->addr1),
3992                                        print_mac(mac2, header->addr2),
3993                                        print_mac(mac3, header->addr3));
3994                 else
3995                         iwl4965_handle_data_packet(priv, 1, include_phy, rxb,
3996                                                    &rx_status);
3997                 break;
3998         }
3999         default:
4000                 break;
4001
4002         }
4003 }
4004
4005 /* Cache phy data (Rx signal strength, etc) for HT frame (REPLY_RX_PHY_CMD).
4006  * This will be used later in iwl4965_rx_reply_rx() for REPLY_RX_MPDU_CMD. */
4007 static void iwl4965_rx_reply_rx_phy(struct iwl4965_priv *priv,
4008                                     struct iwl4965_rx_mem_buffer *rxb)
4009 {
4010         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
4011         priv->last_phy_res[0] = 1;
4012         memcpy(&priv->last_phy_res[1], &(pkt->u.raw[0]),
4013                sizeof(struct iwl4965_rx_phy_res));
4014 }
4015
4016 static void iwl4965_rx_missed_beacon_notif(struct iwl4965_priv *priv,
4017                                            struct iwl4965_rx_mem_buffer *rxb)
4018
4019 {
4020 #ifdef CONFIG_IWL4965_SENSITIVITY
4021         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
4022         struct iwl4965_missed_beacon_notif *missed_beacon;
4023
4024         missed_beacon = &pkt->u.missed_beacon;
4025         if (le32_to_cpu(missed_beacon->consequtive_missed_beacons) > 5) {
4026                 IWL_DEBUG_CALIB("missed bcn cnsq %d totl %d rcd %d expctd %d\n",
4027                     le32_to_cpu(missed_beacon->consequtive_missed_beacons),
4028                     le32_to_cpu(missed_beacon->total_missed_becons),
4029                     le32_to_cpu(missed_beacon->num_recvd_beacons),
4030                     le32_to_cpu(missed_beacon->num_expected_beacons));
4031                 priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
4032                 if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)))
4033                         queue_work(priv->workqueue, &priv->sensitivity_work);
4034         }
4035 #endif /*CONFIG_IWL4965_SENSITIVITY*/
4036 }
4037
4038 #ifdef CONFIG_IWL4965_HT
4039
4040 /**
4041  * iwl4965_sta_modify_enable_tid_tx - Enable Tx for this TID in station table
4042  */
4043 static void iwl4965_sta_modify_enable_tid_tx(struct iwl4965_priv *priv,
4044                                          int sta_id, int tid)
4045 {
4046         unsigned long flags;
4047
4048         /* Remove "disable" flag, to enable Tx for this TID */
4049         spin_lock_irqsave(&priv->sta_lock, flags);
4050         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
4051         priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
4052         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
4053         spin_unlock_irqrestore(&priv->sta_lock, flags);
4054
4055         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
4056 }
4057
4058 /**
4059  * iwl4965_tx_status_reply_compressed_ba - Update tx status from block-ack
4060  *
4061  * Go through block-ack's bitmap of ACK'd frames, update driver's record of
4062  * ACK vs. not.  This gets sent to mac80211, then to rate scaling algo.
4063  */
4064 static int iwl4965_tx_status_reply_compressed_ba(struct iwl4965_priv *priv,
4065                                                  struct iwl4965_ht_agg *agg,
4066                                                  struct iwl4965_compressed_ba_resp*
4067                                                  ba_resp)
4068
4069 {
4070         int i, sh, ack;
4071         u16 seq_ctl = le16_to_cpu(ba_resp->seq_ctl);
4072         u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
4073         u64 bitmap;
4074         int successes = 0;
4075         struct ieee80211_tx_status *tx_status;
4076
4077         if (unlikely(!agg->wait_for_ba))  {
4078                 IWL_ERROR("Received BA when not expected\n");
4079                 return -EINVAL;
4080         }
4081
4082         /* Mark that the expected block-ack response arrived */
4083         agg->wait_for_ba = 0;
4084         IWL_DEBUG_TX_REPLY("BA %d %d\n", agg->start_idx, ba_resp->seq_ctl);
4085
4086         /* Calculate shift to align block-ack bits with our Tx window bits */
4087         sh = agg->start_idx - SEQ_TO_INDEX(seq_ctl>>4);
4088         if (sh < 0) /* tbw something is wrong with indices */
4089                 sh += 0x100;
4090
4091         /* don't use 64-bit values for now */
4092         bitmap = le64_to_cpu(ba_resp->bitmap) >> sh;
4093
4094         if (agg->frame_count > (64 - sh)) {
4095                 IWL_DEBUG_TX_REPLY("more frames than bitmap size");
4096                 return -1;
4097         }
4098
4099         /* check for success or failure according to the
4100          * transmitted bitmap and block-ack bitmap */
4101         bitmap &= agg->bitmap;
4102
4103         /* For each frame attempted in aggregation,
4104          * update driver's record of tx frame's status. */
4105         for (i = 0; i < agg->frame_count ; i++) {
4106                 ack = bitmap & (1 << i);
4107                 successes += !!ack;
4108                 IWL_DEBUG_TX_REPLY("%s ON i=%d idx=%d raw=%d\n",
4109                         ack? "ACK":"NACK", i, (agg->start_idx + i) & 0xff,
4110                         agg->start_idx + i);
4111         }
4112
4113         tx_status = &priv->txq[scd_flow].txb[agg->start_idx].status;
4114         tx_status->flags = IEEE80211_TX_STATUS_ACK;
4115         tx_status->flags |= IEEE80211_TX_STATUS_AMPDU;
4116         tx_status->ampdu_ack_map = successes;
4117         tx_status->ampdu_ack_len = agg->frame_count;
4118         iwl4965_hwrate_to_tx_control(priv, agg->rate_n_flags,
4119                                      &tx_status->control);
4120
4121         IWL_DEBUG_TX_REPLY("Bitmap %llx\n", (unsigned long long)bitmap);
4122
4123         return 0;
4124 }
4125
4126 /**
4127  * iwl4965_tx_queue_stop_scheduler - Stop queue, but keep configuration
4128  */
4129 static void iwl4965_tx_queue_stop_scheduler(struct iwl4965_priv *priv,
4130                                             u16 txq_id)
4131 {
4132         /* Simply stop the queue, but don't change any configuration;
4133          * the SCD_ACT_EN bit is the write-enable mask for the ACTIVE bit. */
4134         iwl4965_write_prph(priv,
4135                 KDR_SCD_QUEUE_STATUS_BITS(txq_id),
4136                 (0 << SCD_QUEUE_STTS_REG_POS_ACTIVE)|
4137                 (1 << SCD_QUEUE_STTS_REG_POS_SCD_ACT_EN));
4138 }
4139
4140 /**
4141  * txq_id must be greater than IWL_BACK_QUEUE_FIRST_ID
4142  * priv->lock must be held by the caller
4143  */
4144 static int iwl4965_tx_queue_agg_disable(struct iwl4965_priv *priv, u16 txq_id,
4145                                         u16 ssn_idx, u8 tx_fifo)
4146 {
4147         int ret = 0;
4148
4149         if (IWL_BACK_QUEUE_FIRST_ID > txq_id) {
4150                 IWL_WARNING("queue number too small: %d, must be > %d\n",
4151                                 txq_id, IWL_BACK_QUEUE_FIRST_ID);
4152                 return -EINVAL;
4153         }
4154
4155         ret = iwl4965_grab_nic_access(priv);
4156         if (ret)
4157                 return ret;
4158
4159         iwl4965_tx_queue_stop_scheduler(priv, txq_id);
4160
4161         iwl4965_clear_bits_prph(priv, KDR_SCD_QUEUECHAIN_SEL, (1 << txq_id));
4162
4163         priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
4164         priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
4165         /* supposes that ssn_idx is valid (!= 0xFFF) */
4166         iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
4167
4168         iwl4965_clear_bits_prph(priv, KDR_SCD_INTERRUPT_MASK, (1 << txq_id));
4169         iwl4965_txq_ctx_deactivate(priv, txq_id);
4170         iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 0);
4171
4172         iwl4965_release_nic_access(priv);
4173
4174         return 0;
4175 }
4176
4177 int iwl4965_check_empty_hw_queue(struct iwl4965_priv *priv, int sta_id,
4178                                          u8 tid, int txq_id)
4179 {
4180         struct iwl4965_queue *q = &priv->txq[txq_id].q;
4181         u8 *addr = priv->stations[sta_id].sta.sta.addr;
4182         struct iwl4965_tid_data *tid_data = &priv->stations[sta_id].tid[tid];
4183
4184         switch (priv->stations[sta_id].tid[tid].agg.state) {
4185         case IWL_EMPTYING_HW_QUEUE_DELBA:
4186                 /* We are reclaiming the last packet of the */
4187                 /* aggregated HW queue */
4188                 if (txq_id  == tid_data->agg.txq_id &&
4189                     q->read_ptr == q->write_ptr) {
4190                         u16 ssn = SEQ_TO_SN(tid_data->seq_number);
4191                         int tx_fifo = default_tid_to_tx_fifo[tid];
4192                         IWL_DEBUG_HT("HW queue empty: continue DELBA flow\n");
4193                         iwl4965_tx_queue_agg_disable(priv, txq_id,
4194                                                      ssn, tx_fifo);
4195                         tid_data->agg.state = IWL_AGG_OFF;
4196                         ieee80211_stop_tx_ba_cb_irqsafe(priv->hw, addr, tid);
4197                 }
4198                 break;
4199         case IWL_EMPTYING_HW_QUEUE_ADDBA:
4200                 /* We are reclaiming the last packet of the queue */
4201                 if (tid_data->tfds_in_queue == 0) {
4202                         IWL_DEBUG_HT("HW queue empty: continue ADDBA flow\n");
4203                         tid_data->agg.state = IWL_AGG_ON;
4204                         ieee80211_start_tx_ba_cb_irqsafe(priv->hw, addr, tid);
4205                 }
4206                 break;
4207         }
4208         return 0;
4209 }
4210
4211 /**
4212  * iwl4965_queue_dec_wrap - Decrement queue index, wrap back to end if needed
4213  * @index -- current index
4214  * @n_bd -- total number of entries in queue (s/b power of 2)
4215  */
4216 static inline int iwl4965_queue_dec_wrap(int index, int n_bd)
4217 {
4218         return (index == 0) ? n_bd - 1 : index - 1;
4219 }
4220
4221 /**
4222  * iwl4965_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
4223  *
4224  * Handles block-acknowledge notification from device, which reports success
4225  * of frames sent via aggregation.
4226  */
4227 static void iwl4965_rx_reply_compressed_ba(struct iwl4965_priv *priv,
4228                                            struct iwl4965_rx_mem_buffer *rxb)
4229 {
4230         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
4231         struct iwl4965_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba;
4232         int index;
4233         struct iwl4965_tx_queue *txq = NULL;
4234         struct iwl4965_ht_agg *agg;
4235         DECLARE_MAC_BUF(mac);
4236
4237         /* "flow" corresponds to Tx queue */
4238         u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
4239
4240         /* "ssn" is start of block-ack Tx window, corresponds to index
4241          * (in Tx queue's circular buffer) of first TFD/frame in window */
4242         u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
4243
4244         if (scd_flow >= ARRAY_SIZE(priv->txq)) {
4245                 IWL_ERROR("BUG_ON scd_flow is bigger than number of queues");
4246                 return;
4247         }
4248
4249         txq = &priv->txq[scd_flow];
4250         agg = &priv->stations[ba_resp->sta_id].tid[ba_resp->tid].agg;
4251
4252         /* Find index just before block-ack window */
4253         index = iwl4965_queue_dec_wrap(ba_resp_scd_ssn & 0xff, txq->q.n_bd);
4254
4255         /* TODO: Need to get this copy more safely - now good for debug */
4256
4257         IWL_DEBUG_TX_REPLY("REPLY_COMPRESSED_BA [%d]Received from %s, "
4258                            "sta_id = %d\n",
4259                            agg->wait_for_ba,
4260                            print_mac(mac, (u8*) &ba_resp->sta_addr_lo32),
4261                            ba_resp->sta_id);
4262         IWL_DEBUG_TX_REPLY("TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = "
4263                            "%d, scd_ssn = %d\n",
4264                            ba_resp->tid,
4265                            ba_resp->seq_ctl,
4266                            (unsigned long long)le64_to_cpu(ba_resp->bitmap),
4267                            ba_resp->scd_flow,
4268                            ba_resp->scd_ssn);
4269         IWL_DEBUG_TX_REPLY("DAT start_idx = %d, bitmap = 0x%llx \n",
4270                            agg->start_idx,
4271                            (unsigned long long)agg->bitmap);
4272
4273         /* Update driver's record of ACK vs. not for each frame in window */
4274         iwl4965_tx_status_reply_compressed_ba(priv, agg, ba_resp);
4275
4276         /* Release all TFDs before the SSN, i.e. all TFDs in front of
4277          * block-ack window (we assume that they've been successfully
4278          * transmitted ... if not, it's too late anyway). */
4279         if (txq->q.read_ptr != (ba_resp_scd_ssn & 0xff)) {
4280                 int freed = iwl4965_tx_queue_reclaim(priv, scd_flow, index);
4281                 priv->stations[ba_resp->sta_id].
4282                         tid[ba_resp->tid].tfds_in_queue -= freed;
4283                 if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
4284                         priv->mac80211_registered &&
4285                         agg->state != IWL_EMPTYING_HW_QUEUE_DELBA)
4286                         ieee80211_wake_queue(priv->hw, scd_flow);
4287                 iwl4965_check_empty_hw_queue(priv, ba_resp->sta_id,
4288                         ba_resp->tid, scd_flow);
4289         }
4290 }
4291
4292 /**
4293  * iwl4965_tx_queue_set_q2ratid - Map unique receiver/tid combination to a queue
4294  */
4295 static int iwl4965_tx_queue_set_q2ratid(struct iwl4965_priv *priv, u16 ra_tid,
4296                                         u16 txq_id)
4297 {
4298         u32 tbl_dw_addr;
4299         u32 tbl_dw;
4300         u16 scd_q2ratid;
4301
4302         scd_q2ratid = ra_tid & SCD_QUEUE_RA_TID_MAP_RATID_MSK;
4303
4304         tbl_dw_addr = priv->scd_base_addr +
4305                         SCD_TRANSLATE_TBL_OFFSET_QUEUE(txq_id);
4306
4307         tbl_dw = iwl4965_read_targ_mem(priv, tbl_dw_addr);
4308
4309         if (txq_id & 0x1)
4310                 tbl_dw = (scd_q2ratid << 16) | (tbl_dw & 0x0000FFFF);
4311         else
4312                 tbl_dw = scd_q2ratid | (tbl_dw & 0xFFFF0000);
4313
4314         iwl4965_write_targ_mem(priv, tbl_dw_addr, tbl_dw);
4315
4316         return 0;
4317 }
4318
4319
4320 /**
4321  * iwl4965_tx_queue_agg_enable - Set up & enable aggregation for selected queue
4322  *
4323  * NOTE:  txq_id must be greater than IWL_BACK_QUEUE_FIRST_ID,
4324  *        i.e. it must be one of the higher queues used for aggregation
4325  */
4326 static int iwl4965_tx_queue_agg_enable(struct iwl4965_priv *priv, int txq_id,
4327                                        int tx_fifo, int sta_id, int tid,
4328                                        u16 ssn_idx)
4329 {
4330         unsigned long flags;
4331         int rc;
4332         u16 ra_tid;
4333
4334         if (IWL_BACK_QUEUE_FIRST_ID > txq_id)
4335                 IWL_WARNING("queue number too small: %d, must be > %d\n",
4336                         txq_id, IWL_BACK_QUEUE_FIRST_ID);
4337
4338         ra_tid = BUILD_RAxTID(sta_id, tid);
4339
4340         /* Modify device's station table to Tx this TID */
4341         iwl4965_sta_modify_enable_tid_tx(priv, sta_id, tid);
4342
4343         spin_lock_irqsave(&priv->lock, flags);
4344         rc = iwl4965_grab_nic_access(priv);
4345         if (rc) {
4346                 spin_unlock_irqrestore(&priv->lock, flags);
4347                 return rc;
4348         }
4349
4350         /* Stop this Tx queue before configuring it */
4351         iwl4965_tx_queue_stop_scheduler(priv, txq_id);
4352
4353         /* Map receiver-address / traffic-ID to this queue */
4354         iwl4965_tx_queue_set_q2ratid(priv, ra_tid, txq_id);
4355
4356         /* Set this queue as a chain-building queue */
4357         iwl4965_set_bits_prph(priv, KDR_SCD_QUEUECHAIN_SEL, (1 << txq_id));
4358
4359         /* Place first TFD at index corresponding to start sequence number.
4360          * Assumes that ssn_idx is valid (!= 0xFFF) */
4361         priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
4362         priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
4363         iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
4364
4365         /* Set up Tx window size and frame limit for this queue */
4366         iwl4965_write_targ_mem(priv,
4367                         priv->scd_base_addr + SCD_CONTEXT_QUEUE_OFFSET(txq_id),
4368                         (SCD_WIN_SIZE << SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
4369                         SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
4370
4371         iwl4965_write_targ_mem(priv, priv->scd_base_addr +
4372                         SCD_CONTEXT_QUEUE_OFFSET(txq_id) + sizeof(u32),
4373                         (SCD_FRAME_LIMIT << SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS)
4374                         & SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
4375
4376         iwl4965_set_bits_prph(priv, KDR_SCD_INTERRUPT_MASK, (1 << txq_id));
4377
4378         /* Set up Status area in SRAM, map to Tx DMA/FIFO, activate the queue */
4379         iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 1);
4380
4381         iwl4965_release_nic_access(priv);
4382         spin_unlock_irqrestore(&priv->lock, flags);
4383
4384         return 0;
4385 }
4386
4387 #endif /* CONFIG_IWL4965_HT */
4388
4389 /**
4390  * iwl4965_add_station - Initialize a station's hardware rate table
4391  *
4392  * The uCode's station table contains a table of fallback rates
4393  * for automatic fallback during transmission.
4394  *
4395  * NOTE: This sets up a default set of values.  These will be replaced later
4396  *       if the driver's iwl-4965-rs rate scaling algorithm is used, instead of
4397  *       rc80211_simple.
4398  *
4399  * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
4400  *       calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
4401  *       which requires station table entry to exist).
4402  */
4403 void iwl4965_add_station(struct iwl4965_priv *priv, const u8 *addr, int is_ap)
4404 {
4405         int i, r;
4406         struct iwl4965_link_quality_cmd link_cmd = {
4407                 .reserved1 = 0,
4408         };
4409         u16 rate_flags;
4410
4411         /* Set up the rate scaling to start at selected rate, fall back
4412          * all the way down to 1M in IEEE order, and then spin on 1M */
4413         if (is_ap)
4414                 r = IWL_RATE_54M_INDEX;
4415         else if (priv->band == IEEE80211_BAND_5GHZ)
4416                 r = IWL_RATE_6M_INDEX;
4417         else
4418                 r = IWL_RATE_1M_INDEX;
4419
4420         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
4421                 rate_flags = 0;
4422                 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
4423                         rate_flags |= RATE_MCS_CCK_MSK;
4424
4425                 /* Use Tx antenna B only */
4426                 rate_flags |= RATE_MCS_ANT_B_MSK;
4427                 rate_flags &= ~RATE_MCS_ANT_A_MSK;
4428
4429                 link_cmd.rs_table[i].rate_n_flags =
4430                         iwl4965_hw_set_rate_n_flags(iwl4965_rates[r].plcp, rate_flags);
4431                 r = iwl4965_get_prev_ieee_rate(r);
4432         }
4433
4434         link_cmd.general_params.single_stream_ant_msk = 2;
4435         link_cmd.general_params.dual_stream_ant_msk = 3;
4436         link_cmd.agg_params.agg_dis_start_th = 3;
4437         link_cmd.agg_params.agg_time_limit = cpu_to_le16(4000);
4438
4439         /* Update the rate scaling for control frame Tx to AP */
4440         link_cmd.sta_id = is_ap ? IWL_AP_ID : priv->hw_setting.bcast_sta_id;
4441
4442         iwl4965_send_cmd_pdu(priv, REPLY_TX_LINK_QUALITY_CMD, sizeof(link_cmd),
4443                          &link_cmd);
4444 }
4445
4446 #ifdef CONFIG_IWL4965_HT
4447
4448 static u8 iwl4965_is_channel_extension(struct iwl4965_priv *priv,
4449                                        enum ieee80211_band band,
4450                                        u16 channel, u8 extension_chan_offset)
4451 {
4452         const struct iwl4965_channel_info *ch_info;
4453
4454         ch_info = iwl4965_get_channel_info(priv, band, channel);
4455         if (!is_channel_valid(ch_info))
4456                 return 0;
4457
4458         if (extension_chan_offset == IWL_EXT_CHANNEL_OFFSET_NONE)
4459                 return 0;
4460
4461         if ((ch_info->fat_extension_channel == extension_chan_offset) ||
4462             (ch_info->fat_extension_channel == HT_IE_EXT_CHANNEL_MAX))
4463                 return 1;
4464
4465         return 0;
4466 }
4467
4468 static u8 iwl4965_is_fat_tx_allowed(struct iwl4965_priv *priv,
4469                                 struct ieee80211_ht_info *sta_ht_inf)
4470 {
4471         struct iwl_ht_info *iwl_ht_conf = &priv->current_ht_config;
4472
4473         if ((!iwl_ht_conf->is_ht) ||
4474            (iwl_ht_conf->supported_chan_width != IWL_CHANNEL_WIDTH_40MHZ) ||
4475            (iwl_ht_conf->extension_chan_offset == IWL_EXT_CHANNEL_OFFSET_NONE))
4476                 return 0;
4477
4478         if (sta_ht_inf) {
4479                 if ((!sta_ht_inf->ht_supported) ||
4480                    (!(sta_ht_inf->cap & IEEE80211_HT_CAP_SUP_WIDTH)))
4481                         return 0;
4482         }
4483
4484         return (iwl4965_is_channel_extension(priv, priv->band,
4485                                          iwl_ht_conf->control_channel,
4486                                          iwl_ht_conf->extension_chan_offset));
4487 }
4488
4489 void iwl4965_set_rxon_ht(struct iwl4965_priv *priv, struct iwl_ht_info *ht_info)
4490 {
4491         struct iwl4965_rxon_cmd *rxon = &priv->staging_rxon;
4492         u32 val;
4493
4494         if (!ht_info->is_ht)
4495                 return;
4496
4497         /* Set up channel bandwidth:  20 MHz only, or 20/40 mixed if fat ok */
4498         if (iwl4965_is_fat_tx_allowed(priv, NULL))
4499                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED_MSK;
4500         else
4501                 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
4502                                  RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
4503
4504         if (le16_to_cpu(rxon->channel) != ht_info->control_channel) {
4505                 IWL_DEBUG_ASSOC("control diff than current %d %d\n",
4506                                 le16_to_cpu(rxon->channel),
4507                                 ht_info->control_channel);
4508                 rxon->channel = cpu_to_le16(ht_info->control_channel);
4509                 return;
4510         }
4511
4512         /* Note: control channel is opposite of extension channel */
4513         switch (ht_info->extension_chan_offset) {
4514         case IWL_EXT_CHANNEL_OFFSET_ABOVE:
4515                 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
4516                 break;
4517         case IWL_EXT_CHANNEL_OFFSET_BELOW:
4518                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
4519                 break;
4520         case IWL_EXT_CHANNEL_OFFSET_NONE:
4521         default:
4522                 rxon->flags &= ~RXON_FLG_CHANNEL_MODE_MIXED_MSK;
4523                 break;
4524         }
4525
4526         val = ht_info->ht_protection;
4527
4528         rxon->flags |= cpu_to_le32(val << RXON_FLG_HT_OPERATING_MODE_POS);
4529
4530         iwl4965_set_rxon_chain(priv);
4531
4532         IWL_DEBUG_ASSOC("supported HT rate 0x%X %X "
4533                         "rxon flags 0x%X operation mode :0x%X "
4534                         "extension channel offset 0x%x "
4535                         "control chan %d\n",
4536                         ht_info->supp_mcs_set[0], ht_info->supp_mcs_set[1],
4537                         le32_to_cpu(rxon->flags), ht_info->ht_protection,
4538                         ht_info->extension_chan_offset,
4539                         ht_info->control_channel);
4540         return;
4541 }
4542
4543 void iwl4965_set_ht_add_station(struct iwl4965_priv *priv, u8 index,
4544                                 struct ieee80211_ht_info *sta_ht_inf)
4545 {
4546         __le32 sta_flags;
4547         u8 mimo_ps_mode;
4548
4549         if (!sta_ht_inf || !sta_ht_inf->ht_supported)
4550                 goto done;
4551
4552         mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2;
4553
4554         sta_flags = priv->stations[index].sta.station_flags;
4555
4556         sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
4557
4558         switch (mimo_ps_mode) {
4559         case WLAN_HT_CAP_MIMO_PS_STATIC:
4560                 sta_flags |= STA_FLG_MIMO_DIS_MSK;
4561                 break;
4562         case WLAN_HT_CAP_MIMO_PS_DYNAMIC:
4563                 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
4564                 break;
4565         case WLAN_HT_CAP_MIMO_PS_DISABLED:
4566                 break;
4567         default:
4568                 IWL_WARNING("Invalid MIMO PS mode %d", mimo_ps_mode);
4569                 break;
4570         }
4571
4572         sta_flags |= cpu_to_le32(
4573               (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
4574
4575         sta_flags |= cpu_to_le32(
4576               (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
4577
4578         if (iwl4965_is_fat_tx_allowed(priv, sta_ht_inf))
4579                 sta_flags |= STA_FLG_FAT_EN_MSK;
4580         else
4581                 sta_flags &= ~STA_FLG_FAT_EN_MSK;
4582
4583         priv->stations[index].sta.station_flags = sta_flags;
4584  done:
4585         return;
4586 }
4587
4588 static void iwl4965_sta_modify_add_ba_tid(struct iwl4965_priv *priv,
4589                                           int sta_id, int tid, u16 ssn)
4590 {
4591         unsigned long flags;
4592
4593         spin_lock_irqsave(&priv->sta_lock, flags);
4594         priv->stations[sta_id].sta.station_flags_msk = 0;
4595         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
4596         priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
4597         priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
4598         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
4599         spin_unlock_irqrestore(&priv->sta_lock, flags);
4600
4601         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
4602 }
4603
4604 static void iwl4965_sta_modify_del_ba_tid(struct iwl4965_priv *priv,
4605                                           int sta_id, int tid)
4606 {
4607         unsigned long flags;
4608
4609         spin_lock_irqsave(&priv->sta_lock, flags);
4610         priv->stations[sta_id].sta.station_flags_msk = 0;
4611         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
4612         priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
4613         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
4614         spin_unlock_irqrestore(&priv->sta_lock, flags);
4615
4616         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
4617 }
4618
4619 /*
4620  * Find first available (lowest unused) Tx Queue, mark it "active".
4621  * Called only when finding queue for aggregation.
4622  * Should never return anything < 7, because they should already
4623  * be in use as EDCA AC (0-3), Command (4), HCCA (5, 6).
4624  */
4625 static int iwl4965_txq_ctx_activate_free(struct iwl4965_priv *priv)
4626 {
4627         int txq_id;
4628
4629         for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++)
4630                 if (!test_and_set_bit(txq_id, &priv->txq_ctx_active_msk))
4631                         return txq_id;
4632         return -1;
4633 }
4634
4635 static int iwl4965_mac_ht_tx_agg_start(struct ieee80211_hw *hw, const u8 *da,
4636                                        u16 tid, u16 *start_seq_num)
4637 {
4638         struct iwl4965_priv *priv = hw->priv;
4639         int sta_id;
4640         int tx_fifo;
4641         int txq_id;
4642         int ssn = -1;
4643         int ret = 0;
4644         unsigned long flags;
4645         struct iwl4965_tid_data *tid_data;
4646         DECLARE_MAC_BUF(mac);
4647
4648         if (likely(tid < ARRAY_SIZE(default_tid_to_tx_fifo)))
4649                 tx_fifo = default_tid_to_tx_fifo[tid];
4650         else
4651                 return -EINVAL;
4652
4653         IWL_WARNING("%s on da = %s tid = %d\n",
4654                         __func__, print_mac(mac, da), tid);
4655
4656         sta_id = iwl4965_hw_find_station(priv, da);
4657         if (sta_id == IWL_INVALID_STATION)
4658                 return -ENXIO;
4659
4660         if (priv->stations[sta_id].tid[tid].agg.state != IWL_AGG_OFF) {
4661                 IWL_ERROR("Start AGG when state is not IWL_AGG_OFF !\n");
4662                 return -ENXIO;
4663         }
4664
4665         txq_id = iwl4965_txq_ctx_activate_free(priv);
4666         if (txq_id == -1)
4667                 return -ENXIO;
4668
4669         spin_lock_irqsave(&priv->sta_lock, flags);
4670         tid_data = &priv->stations[sta_id].tid[tid];
4671         ssn = SEQ_TO_SN(tid_data->seq_number);
4672         tid_data->agg.txq_id = txq_id;
4673         spin_unlock_irqrestore(&priv->sta_lock, flags);
4674
4675         *start_seq_num = ssn;
4676         ret = iwl4965_tx_queue_agg_enable(priv, txq_id, tx_fifo,
4677                                           sta_id, tid, ssn);
4678         if (ret)
4679                 return ret;
4680
4681         ret = 0;
4682         if (tid_data->tfds_in_queue == 0) {
4683                 printk(KERN_ERR "HW queue is empty\n");
4684                 tid_data->agg.state = IWL_AGG_ON;
4685                 ieee80211_start_tx_ba_cb_irqsafe(hw, da, tid);
4686         } else {
4687                 IWL_DEBUG_HT("HW queue is NOT empty: %d packets in HW queue\n",
4688                                 tid_data->tfds_in_queue);
4689                 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA;
4690         }
4691         return ret;
4692 }
4693
4694 static int iwl4965_mac_ht_tx_agg_stop(struct ieee80211_hw *hw, const u8 *da,
4695                                       u16 tid)
4696 {
4697
4698         struct iwl4965_priv *priv = hw->priv;
4699         int tx_fifo_id, txq_id, sta_id, ssn = -1;
4700         struct iwl4965_tid_data *tid_data;
4701         int ret, write_ptr, read_ptr;
4702         unsigned long flags;
4703         DECLARE_MAC_BUF(mac);
4704
4705         if (!da) {
4706                 IWL_ERROR("da = NULL\n");
4707                 return -EINVAL;
4708         }
4709
4710         if (likely(tid < ARRAY_SIZE(default_tid_to_tx_fifo)))
4711                 tx_fifo_id = default_tid_to_tx_fifo[tid];
4712         else
4713                 return -EINVAL;
4714
4715         sta_id = iwl4965_hw_find_station(priv, da);
4716
4717         if (sta_id == IWL_INVALID_STATION)
4718                 return -ENXIO;
4719
4720         if (priv->stations[sta_id].tid[tid].agg.state != IWL_AGG_ON)
4721                 IWL_WARNING("Stopping AGG while state not IWL_AGG_ON\n");
4722
4723         tid_data = &priv->stations[sta_id].tid[tid];
4724         ssn = (tid_data->seq_number & IEEE80211_SCTL_SEQ) >> 4;
4725         txq_id = tid_data->agg.txq_id;
4726         write_ptr = priv->txq[txq_id].q.write_ptr;
4727         read_ptr = priv->txq[txq_id].q.read_ptr;
4728
4729         /* The queue is not empty */
4730         if (write_ptr != read_ptr) {
4731                 IWL_DEBUG_HT("Stopping a non empty AGG HW QUEUE\n");
4732                 priv->stations[sta_id].tid[tid].agg.state =
4733                                 IWL_EMPTYING_HW_QUEUE_DELBA;
4734                 return 0;
4735         }
4736
4737         IWL_DEBUG_HT("HW queue empty\n");;
4738         priv->stations[sta_id].tid[tid].agg.state = IWL_AGG_OFF;
4739
4740         spin_lock_irqsave(&priv->lock, flags);
4741         ret = iwl4965_tx_queue_agg_disable(priv, txq_id, ssn, tx_fifo_id);
4742         spin_unlock_irqrestore(&priv->lock, flags);
4743
4744         if (ret)
4745                 return ret;
4746
4747         ieee80211_stop_tx_ba_cb_irqsafe(priv->hw, da, tid);
4748
4749         IWL_DEBUG_INFO("iwl4965_mac_ht_tx_agg_stop on da=%s tid=%d\n",
4750                         print_mac(mac, da), tid);
4751
4752         return 0;
4753 }
4754
4755 int iwl4965_mac_ampdu_action(struct ieee80211_hw *hw,
4756                              enum ieee80211_ampdu_mlme_action action,
4757                              const u8 *addr, u16 tid, u16 *ssn)
4758 {
4759         struct iwl4965_priv *priv = hw->priv;
4760         int sta_id;
4761         DECLARE_MAC_BUF(mac);
4762
4763         IWL_DEBUG_HT("A-MPDU action on da=%s tid=%d ",
4764                         print_mac(mac, addr), tid);
4765         sta_id = iwl4965_hw_find_station(priv, addr);
4766         switch (action) {
4767         case IEEE80211_AMPDU_RX_START:
4768                 IWL_DEBUG_HT("start Rx\n");
4769                 iwl4965_sta_modify_add_ba_tid(priv, sta_id, tid, *ssn);
4770                 break;
4771         case IEEE80211_AMPDU_RX_STOP:
4772                 IWL_DEBUG_HT("stop Rx\n");
4773                 iwl4965_sta_modify_del_ba_tid(priv, sta_id, tid);
4774                 break;
4775         case IEEE80211_AMPDU_TX_START:
4776                 IWL_DEBUG_HT("start Tx\n");
4777                 return iwl4965_mac_ht_tx_agg_start(hw, addr, tid, ssn);
4778         case IEEE80211_AMPDU_TX_STOP:
4779                 IWL_DEBUG_HT("stop Tx\n");
4780                 return iwl4965_mac_ht_tx_agg_stop(hw, addr, tid);
4781         default:
4782                 IWL_DEBUG_HT("unknown\n");
4783                 return -EINVAL;
4784                 break;
4785         }
4786         return 0;
4787 }
4788
4789 #endif /* CONFIG_IWL4965_HT */
4790
4791 /* Set up 4965-specific Rx frame reply handlers */
4792 void iwl4965_hw_rx_handler_setup(struct iwl4965_priv *priv)
4793 {
4794         /* Legacy Rx frames */
4795         priv->rx_handlers[REPLY_4965_RX] = iwl4965_rx_reply_rx;
4796
4797         /* High-throughput (HT) Rx frames */
4798         priv->rx_handlers[REPLY_RX_PHY_CMD] = iwl4965_rx_reply_rx_phy;
4799         priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwl4965_rx_reply_rx;
4800
4801         priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] =
4802             iwl4965_rx_missed_beacon_notif;
4803
4804 #ifdef CONFIG_IWL4965_HT
4805         priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl4965_rx_reply_compressed_ba;
4806 #endif /* CONFIG_IWL4965_HT */
4807 }
4808
4809 void iwl4965_hw_setup_deferred_work(struct iwl4965_priv *priv)
4810 {
4811         INIT_WORK(&priv->txpower_work, iwl4965_bg_txpower_work);
4812         INIT_WORK(&priv->statistics_work, iwl4965_bg_statistics_work);
4813 #ifdef CONFIG_IWL4965_SENSITIVITY
4814         INIT_WORK(&priv->sensitivity_work, iwl4965_bg_sensitivity_work);
4815 #endif
4816         init_timer(&priv->statistics_periodic);
4817         priv->statistics_periodic.data = (unsigned long)priv;
4818         priv->statistics_periodic.function = iwl4965_bg_statistics_periodic;
4819 }
4820
4821 void iwl4965_hw_cancel_deferred_work(struct iwl4965_priv *priv)
4822 {
4823         del_timer_sync(&priv->statistics_periodic);
4824
4825         cancel_delayed_work(&priv->init_alive_start);
4826 }
4827
4828 static struct iwl_lib_ops iwl4965_lib = {
4829         .eeprom_ops = {
4830                 .verify_signature  = iwlcore_eeprom_verify_signature,
4831                 .acquire_semaphore = iwlcore_eeprom_acquire_semaphore,
4832                 .release_semaphore = iwlcore_eeprom_release_semaphore,
4833         },
4834 };
4835
4836 static struct iwl_ops iwl4965_ops = {
4837         .lib = &iwl4965_lib,
4838 };
4839
4840 static struct iwl_cfg iwl4965_agn_cfg = {
4841         .name = "4965AGN",
4842         .fw_name = "iwlwifi-4965" IWL4965_UCODE_API ".ucode",
4843         .sku = IWL_SKU_A|IWL_SKU_G|IWL_SKU_N,
4844         .ops = &iwl4965_ops,
4845 };
4846
4847 struct pci_device_id iwl4965_hw_card_ids[] = {
4848         {IWL_PCI_DEVICE(0x4229, PCI_ANY_ID, iwl4965_agn_cfg)},
4849         {IWL_PCI_DEVICE(0x4230, PCI_ANY_ID, iwl4965_agn_cfg)},
4850         {0}
4851 };
4852
4853 MODULE_DEVICE_TABLE(pci, iwl4965_hw_card_ids);