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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2007 Intel Corporation. All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of version 2 of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  17  *
  18  * The full GNU General Public License is included in this distribution in the
  19  * file called LICENSE.
  20  *
  21  * Contact Information:
  22  * James P. Ketrenos <ipw2100-admin@linux.intel.com>
  23  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  24  *
  25  *****************************************************************************/
  26
  27 #include <linux/kernel.h>
  28 #include <linux/module.h>
  29 #include <linux/version.h>
  30 #include <linux/init.h>
  31 #include <linux/pci.h>
  32 #include <linux/dma-mapping.h>
  33 #include <linux/delay.h>
  34 #include <linux/skbuff.h>
  35 #include <linux/netdevice.h>
  36 #include <linux/wireless.h>
  37 #include <net/mac80211.h>
  38 #include <linux/etherdevice.h>
  39 #include <asm/unaligned.h>
  40
  41 #include "iwl-4965.h"
  42 #include "iwl-helpers.h"
  43
  44 static void iwl4965_hw_card_show_info(struct iwl4965_priv *priv);
  45
  46 #define IWL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np)    \
  47         [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP,      \
  48                                     IWL_RATE_SISO_##s##M_PLCP, \
  49                                     IWL_RATE_MIMO_##s##M_PLCP, \
  50                                     IWL_RATE_##r##M_IEEE,      \
  51                                     IWL_RATE_##ip##M_INDEX,    \
  52                                     IWL_RATE_##in##M_INDEX,    \
  53                                     IWL_RATE_##rp##M_INDEX,    \
  54                                     IWL_RATE_##rn##M_INDEX,    \
  55                                     IWL_RATE_##pp##M_INDEX,    \
  56                                     IWL_RATE_##np##M_INDEX }
  57
  58 /*
  59  * Parameter order:
  60  *   rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate
  61  *
  62  * If there isn't a valid next or previous rate then INV is used which
  63  * maps to IWL_RATE_INVALID
  64  *
  65  */
  66 const struct iwl4965_rate_info iwl4965_rates[IWL_RATE_COUNT] = {
  67         IWL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2),    /*  1mbps */
  68         IWL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5),          /*  2mbps */
  69         IWL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11),        /*5.5mbps */
  70         IWL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18),      /* 11mbps */
  71         IWL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11),        /*  6mbps */
  72         IWL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11),       /*  9mbps */
  73         IWL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18),   /* 12mbps */
  74         IWL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24),   /* 18mbps */
  75         IWL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36),   /* 24mbps */
  76         IWL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48),   /* 36mbps */
  77         IWL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54),   /* 48mbps */
  78         IWL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */
  79         IWL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */
  80 };
  81
  82 #ifdef CONFIG_IWL4965_HT
  83
  84 static const u16 default_tid_to_tx_fifo[] = {
  85         IWL_TX_FIFO_AC1,
  86         IWL_TX_FIFO_AC0,
  87         IWL_TX_FIFO_AC0,
  88         IWL_TX_FIFO_AC1,
  89         IWL_TX_FIFO_AC2,
  90         IWL_TX_FIFO_AC2,
  91         IWL_TX_FIFO_AC3,
  92         IWL_TX_FIFO_AC3,
  93         IWL_TX_FIFO_NONE,
  94         IWL_TX_FIFO_NONE,
  95         IWL_TX_FIFO_NONE,
  96         IWL_TX_FIFO_NONE,
  97         IWL_TX_FIFO_NONE,
  98         IWL_TX_FIFO_NONE,
  99         IWL_TX_FIFO_NONE,
 100         IWL_TX_FIFO_NONE,
 101         IWL_TX_FIFO_AC3
 102 };
 103
 104 #endif  /*CONFIG_IWL4965_HT */
 105
 106 static int is_fat_channel(__le32 rxon_flags)
 107 {
 108         return (rxon_flags & RXON_FLG_CHANNEL_MODE_PURE_40_MSK) ||
 109                 (rxon_flags & RXON_FLG_CHANNEL_MODE_MIXED_MSK);
 110 }
 111
 112 static u8 is_single_stream(struct iwl4965_priv *priv)
 113 {
 114 #ifdef CONFIG_IWL4965_HT
 115         if (!priv->current_ht_config.is_ht ||
 116             (priv->current_ht_config.supp_mcs_set[1] == 0) ||
 117             (priv->ps_mode == IWL_MIMO_PS_STATIC))
 118                 return 1;
 119 #else
 120         return 1;
 121 #endif  /*CONFIG_IWL4965_HT */
 122         return 0;
 123 }
 124
 125 /*
 126  * Determine how many receiver/antenna chains to use.
 127  * More provides better reception via diversity.  Fewer saves power.
 128  * MIMO (dual stream) requires at least 2, but works better with 3.
 129  * This does not determine *which* chains to use, just how many.
 130  */
 131 static int iwl4965_get_rx_chain_counter(struct iwl4965_priv *priv,
 132                                         u8 *idle_state, u8 *rx_state)
 133 {
 134         u8 is_single = is_single_stream(priv);
 135         u8 is_cam = test_bit(STATUS_POWER_PMI, &priv->status) ? 0 : 1;
 136
 137         /* # of Rx chains to use when expecting MIMO. */
 138         if (is_single || (!is_cam && (priv->ps_mode == IWL_MIMO_PS_STATIC)))
 139                 *rx_state = 2;
 140         else
 141                 *rx_state = 3;
 142
 143         /* # Rx chains when idling and maybe trying to save power */
 144         switch (priv->ps_mode) {
 145         case IWL_MIMO_PS_STATIC:
 146         case IWL_MIMO_PS_DYNAMIC:
 147                 *idle_state = (is_cam) ? 2 : 1;
 148                 break;
 149         case IWL_MIMO_PS_NONE:
 150                 *idle_state = (is_cam) ? *rx_state : 1;
 151                 break;
 152         default:
 153                 *idle_state = 1;
 154                 break;
 155         }
 156
 157         return 0;
 158 }
 159
 160 int iwl4965_hw_rxq_stop(struct iwl4965_priv *priv)
 161 {
 162         int rc;
 163         unsigned long flags;
 164
 165         spin_lock_irqsave(&priv->lock, flags);
 166         rc = iwl4965_grab_nic_access(priv);
 167         if (rc) {
 168                 spin_unlock_irqrestore(&priv->lock, flags);
 169                 return rc;
 170         }
 171
 172         /* stop Rx DMA */
 173         iwl4965_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0);
 174         rc = iwl4965_poll_direct_bit(priv, FH_MEM_RSSR_RX_STATUS_REG,
 175                                      (1 << 24), 1000);
 176         if (rc < 0)
 177                 IWL_ERROR("Can't stop Rx DMA.\n");
 178
 179         iwl4965_release_nic_access(priv);
 180         spin_unlock_irqrestore(&priv->lock, flags);
 181
 182         return 0;
 183 }
 184
 185 u8 iwl4965_hw_find_station(struct iwl4965_priv *priv, const u8 *addr)
 186 {
 187         int i;
 188         int start = 0;
 189         int ret = IWL_INVALID_STATION;
 190         unsigned long flags;
 191         DECLARE_MAC_BUF(mac);
 192
 193         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) ||
 194             (priv->iw_mode == IEEE80211_IF_TYPE_AP))
 195                 start = IWL_STA_ID;
 196
 197         if (is_broadcast_ether_addr(addr))
 198                 return IWL4965_BROADCAST_ID;
 199
 200         spin_lock_irqsave(&priv->sta_lock, flags);
 201         for (i = start; i < priv->hw_setting.max_stations; i++)
 202                 if ((priv->stations[i].used) &&
 203                     (!compare_ether_addr
 204                      (priv->stations[i].sta.sta.addr, addr))) {
 205                         ret = i;
 206                         goto out;
 207                 }
 208
 209         IWL_DEBUG_ASSOC_LIMIT("can not find STA %s total %d\n",
 210                         print_mac(mac, addr), priv->num_stations);
 211
 212  out:
 213         spin_unlock_irqrestore(&priv->sta_lock, flags);
 214         return ret;
 215 }
 216
 217 static int iwl4965_nic_set_pwr_src(struct iwl4965_priv *priv, int pwr_max)
 218 {
 219         int ret;
 220         unsigned long flags;
 221
 222         spin_lock_irqsave(&priv->lock, flags);
 223         ret = iwl4965_grab_nic_access(priv);
 224         if (ret) {
 225                 spin_unlock_irqrestore(&priv->lock, flags);
 226                 return ret;
 227         }
 228
 229         if (!pwr_max) {
 230                 u32 val;
 231
 232                 ret = pci_read_config_dword(priv->pci_dev, PCI_POWER_SOURCE,
 233                                            &val);
 234
 235                 if (val & PCI_CFG_PMC_PME_FROM_D3COLD_SUPPORT)
 236                         iwl4965_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 237                                 APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
 238                                 ~APMG_PS_CTRL_MSK_PWR_SRC);
 239         } else
 240                 iwl4965_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 241                         APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
 242                         ~APMG_PS_CTRL_MSK_PWR_SRC);
 243
 244         iwl4965_release_nic_access(priv);
 245         spin_unlock_irqrestore(&priv->lock, flags);
 246
 247         return ret;
 248 }
 249
 250 static int iwl4965_rx_init(struct iwl4965_priv *priv, struct iwl4965_rx_queue *rxq)
 251 {
 252         int rc;
 253         unsigned long flags;
 254         unsigned int rb_size;
 255
 256         spin_lock_irqsave(&priv->lock, flags);
 257         rc = iwl4965_grab_nic_access(priv);
 258         if (rc) {
 259                 spin_unlock_irqrestore(&priv->lock, flags);
 260                 return rc;
 261         }
 262
 263         if (iwl4965_param_amsdu_size_8K)
 264                 rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_8K;
 265         else
 266                 rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K;
 267
 268         /* Stop Rx DMA */
 269         iwl4965_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0);
 270
 271         /* Reset driver's Rx queue write index */
 272         iwl4965_write_direct32(priv, FH_RSCSR_CHNL0_RBDCB_WPTR_REG, 0);
 273
 274         /* Tell device where to find RBD circular buffer in DRAM */
 275         iwl4965_write_direct32(priv, FH_RSCSR_CHNL0_RBDCB_BASE_REG,
 276                              rxq->dma_addr >> 8);
 277
 278         /* Tell device where in DRAM to update its Rx status */
 279         iwl4965_write_direct32(priv, FH_RSCSR_CHNL0_STTS_WPTR_REG,
 280                              (priv->hw_setting.shared_phys +
 281                               offsetof(struct iwl4965_shared, val0)) >> 4);
 282
 283         /* Enable Rx DMA, enable host interrupt, Rx buffer size 4k, 256 RBDs */
 284         iwl4965_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG,
 285                              FH_RCSR_RX_CONFIG_CHNL_EN_ENABLE_VAL |
 286                              FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_INT_HOST_VAL |
 287                              rb_size |
 288                              /*0x10 << 4 | */
 289                              (RX_QUEUE_SIZE_LOG <<
 290                               FH_RCSR_RX_CONFIG_RBDCB_SIZE_BITSHIFT));
 291
 292         /*
 293          * iwl4965_write32(priv,CSR_INT_COAL_REG,0);
 294          */
 295
 296         iwl4965_release_nic_access(priv);
 297         spin_unlock_irqrestore(&priv->lock, flags);
 298
 299         return 0;
 300 }
 301
 302 /* Tell 4965 where to find the "keep warm" buffer */
 303 static int iwl4965_kw_init(struct iwl4965_priv *priv)
 304 {
 305         unsigned long flags;
 306         int rc;
 307
 308         spin_lock_irqsave(&priv->lock, flags);
 309         rc = iwl4965_grab_nic_access(priv);
 310         if (rc)
 311                 goto out;
 312
 313         iwl4965_write_direct32(priv, IWL_FH_KW_MEM_ADDR_REG,
 314                              priv->kw.dma_addr >> 4);
 315         iwl4965_release_nic_access(priv);
 316 out:
 317         spin_unlock_irqrestore(&priv->lock, flags);
 318         return rc;
 319 }
 320
 321 static int iwl4965_kw_alloc(struct iwl4965_priv *priv)
 322 {
 323         struct pci_dev *dev = priv->pci_dev;
 324         struct iwl4965_kw *kw = &priv->kw;
 325
 326         kw->size = IWL4965_KW_SIZE;     /* TBW need set somewhere else */
 327         kw->v_addr = pci_alloc_consistent(dev, kw->size, &kw->dma_addr);
 328         if (!kw->v_addr)
 329                 return -ENOMEM;
 330
 331         return 0;
 332 }
 333
 334 #define CHECK_AND_PRINT(x) ((eeprom_ch->flags & EEPROM_CHANNEL_##x) \
 335                             ? # x " " : "")
 336
 337 /**
 338  * iwl4965_set_fat_chan_info - Copy fat channel info into driver's priv.
 339  *
 340  * Does not set up a command, or touch hardware.
 341  */
 342 int iwl4965_set_fat_chan_info(struct iwl4965_priv *priv, int phymode, u16 channel,
 343                               const struct iwl4965_eeprom_channel *eeprom_ch,
 344                               u8 fat_extension_channel)
 345 {
 346         struct iwl4965_channel_info *ch_info;
 347
 348         ch_info = (struct iwl4965_channel_info *)
 349                         iwl4965_get_channel_info(priv, phymode, channel);
 350
 351         if (!is_channel_valid(ch_info))
 352                 return -1;
 353
 354         IWL_DEBUG_INFO("FAT Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x"
 355                         " %ddBm): Ad-Hoc %ssupported\n",
 356                         ch_info->channel,
 357                         is_channel_a_band(ch_info) ?
 358                         "5.2" : "2.4",
 359                         CHECK_AND_PRINT(IBSS),
 360                         CHECK_AND_PRINT(ACTIVE),
 361                         CHECK_AND_PRINT(RADAR),
 362                         CHECK_AND_PRINT(WIDE),
 363                         CHECK_AND_PRINT(NARROW),
 364                         CHECK_AND_PRINT(DFS),
 365                         eeprom_ch->flags,
 366                         eeprom_ch->max_power_avg,
 367                         ((eeprom_ch->flags & EEPROM_CHANNEL_IBSS)
 368                          && !(eeprom_ch->flags & EEPROM_CHANNEL_RADAR)) ?
 369                         "" : "not ");
 370
 371         ch_info->fat_eeprom = *eeprom_ch;
 372         ch_info->fat_max_power_avg = eeprom_ch->max_power_avg;
 373         ch_info->fat_curr_txpow = eeprom_ch->max_power_avg;
 374         ch_info->fat_min_power = 0;
 375         ch_info->fat_scan_power = eeprom_ch->max_power_avg;
 376         ch_info->fat_flags = eeprom_ch->flags;
 377         ch_info->fat_extension_channel = fat_extension_channel;
 378
 379         return 0;
 380 }
 381
 382 /**
 383  * iwl4965_kw_free - Free the "keep warm" buffer
 384  */
 385 static void iwl4965_kw_free(struct iwl4965_priv *priv)
 386 {
 387         struct pci_dev *dev = priv->pci_dev;
 388         struct iwl4965_kw *kw = &priv->kw;
 389
 390         if (kw->v_addr) {
 391                 pci_free_consistent(dev, kw->size, kw->v_addr, kw->dma_addr);
 392                 memset(kw, 0, sizeof(*kw));
 393         }
 394 }
 395
 396 /**
 397  * iwl4965_txq_ctx_reset - Reset TX queue context
 398  * Destroys all DMA structures and initialise them again
 399  *
 400  * @param priv
 401  * @return error code
 402  */
 403 static int iwl4965_txq_ctx_reset(struct iwl4965_priv *priv)
 404 {
 405         int rc = 0;
 406         int txq_id, slots_num;
 407         unsigned long flags;
 408
 409         iwl4965_kw_free(priv);
 410
 411         /* Free all tx/cmd queues and keep-warm buffer */
 412         iwl4965_hw_txq_ctx_free(priv);
 413
 414         /* Alloc keep-warm buffer */
 415         rc = iwl4965_kw_alloc(priv);
 416         if (rc) {
 417                 IWL_ERROR("Keep Warm allocation failed");
 418                 goto error_kw;
 419         }
 420
 421         spin_lock_irqsave(&priv->lock, flags);
 422
 423         rc = iwl4965_grab_nic_access(priv);
 424         if (unlikely(rc)) {
 425                 IWL_ERROR("TX reset failed");
 426                 spin_unlock_irqrestore(&priv->lock, flags);
 427                 goto error_reset;
 428         }
 429
 430         /* Turn off all Tx DMA channels */
 431         iwl4965_write_prph(priv, KDR_SCD_TXFACT, 0);
 432         iwl4965_release_nic_access(priv);
 433         spin_unlock_irqrestore(&priv->lock, flags);
 434
 435         /* Tell 4965 where to find the keep-warm buffer */
 436         rc = iwl4965_kw_init(priv);
 437         if (rc) {
 438                 IWL_ERROR("kw_init failed\n");
 439                 goto error_reset;
 440         }
 441
 442         /* Alloc and init all (default 16) Tx queues,
 443          * including the command queue (#4) */
 444         for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++) {
 445                 slots_num = (txq_id == IWL_CMD_QUEUE_NUM) ?
 446                                         TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS;
 447                 rc = iwl4965_tx_queue_init(priv, &priv->txq[txq_id], slots_num,
 448                                        txq_id);
 449                 if (rc) {
 450                         IWL_ERROR("Tx %d queue init failed\n", txq_id);
 451                         goto error;
 452                 }
 453         }
 454
 455         return rc;
 456
 457  error:
 458         iwl4965_hw_txq_ctx_free(priv);
 459  error_reset:
 460         iwl4965_kw_free(priv);
 461  error_kw:
 462         return rc;
 463 }
 464
 465 int iwl4965_hw_nic_init(struct iwl4965_priv *priv)
 466 {
 467         int rc;
 468         unsigned long flags;
 469         struct iwl4965_rx_queue *rxq = &priv->rxq;
 470         u8 rev_id;
 471         u32 val;
 472         u8 val_link;
 473
 474         iwl4965_power_init_handle(priv);
 475
 476         /* nic_init */
 477         spin_lock_irqsave(&priv->lock, flags);
 478
 479         iwl4965_set_bit(priv, CSR_GIO_CHICKEN_BITS,
 480                     CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
 481
 482         iwl4965_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 483         rc = iwl4965_poll_bit(priv, CSR_GP_CNTRL,
 484                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
 485                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
 486         if (rc < 0) {
 487                 spin_unlock_irqrestore(&priv->lock, flags);
 488                 IWL_DEBUG_INFO("Failed to init the card\n");
 489                 return rc;
 490         }
 491
 492         rc = iwl4965_grab_nic_access(priv);
 493         if (rc) {
 494                 spin_unlock_irqrestore(&priv->lock, flags);
 495                 return rc;
 496         }
 497
 498         iwl4965_read_prph(priv, APMG_CLK_CTRL_REG);
 499
 500         iwl4965_write_prph(priv, APMG_CLK_CTRL_REG,
 501                                  APMG_CLK_VAL_DMA_CLK_RQT |
 502                                  APMG_CLK_VAL_BSM_CLK_RQT);
 503         iwl4965_read_prph(priv, APMG_CLK_CTRL_REG);
 504
 505         udelay(20);
 506
 507         iwl4965_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
 508                                     APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
 509
 510         iwl4965_release_nic_access(priv);
 511         iwl4965_write32(priv, CSR_INT_COALESCING, 512 / 32);
 512         spin_unlock_irqrestore(&priv->lock, flags);
 513
 514         /* Determine HW type */
 515         rc = pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &rev_id);
 516         if (rc)
 517                 return rc;
 518
 519         IWL_DEBUG_INFO("HW Revision ID = 0x%X\n", rev_id);
 520
 521         iwl4965_nic_set_pwr_src(priv, 1);
 522         spin_lock_irqsave(&priv->lock, flags);
 523
 524         if ((rev_id & 0x80) == 0x80 && (rev_id & 0x7f) < 8) {
 525                 pci_read_config_dword(priv->pci_dev, PCI_REG_WUM8, &val);
 526                 /* Enable No Snoop field */
 527                 pci_write_config_dword(priv->pci_dev, PCI_REG_WUM8,
 528                                        val & ~(1 << 11));
 529         }
 530
 531         spin_unlock_irqrestore(&priv->lock, flags);
 532
 533         if (priv->eeprom.calib_version < EEPROM_TX_POWER_VERSION_NEW) {
 534                 IWL_ERROR("Older EEPROM detected!  Aborting.\n");
 535                 return -EINVAL;
 536         }
 537
 538         pci_read_config_byte(priv->pci_dev, PCI_LINK_CTRL, &val_link);
 539
 540         /* disable L1 entry -- workaround for pre-B1 */
 541         pci_write_config_byte(priv->pci_dev, PCI_LINK_CTRL, val_link & ~0x02);
 542
 543         spin_lock_irqsave(&priv->lock, flags);
 544
 545         /* set CSR_HW_CONFIG_REG for uCode use */
 546
 547         iwl4965_set_bit(priv, CSR_SW_VER, CSR_HW_IF_CONFIG_REG_BIT_KEDRON_R |
 548                     CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
 549                     CSR_HW_IF_CONFIG_REG_BIT_MAC_SI);
 550
 551         rc = iwl4965_grab_nic_access(priv);
 552         if (rc < 0) {
 553                 spin_unlock_irqrestore(&priv->lock, flags);
 554                 IWL_DEBUG_INFO("Failed to init the card\n");
 555                 return rc;
 556         }
 557
 558         iwl4965_read_prph(priv, APMG_PS_CTRL_REG);
 559         iwl4965_set_bits_prph(priv, APMG_PS_CTRL_REG,
 560                                     APMG_PS_CTRL_VAL_RESET_REQ);
 561         udelay(5);
 562         iwl4965_clear_bits_prph(priv, APMG_PS_CTRL_REG,
 563                                       APMG_PS_CTRL_VAL_RESET_REQ);
 564
 565         iwl4965_release_nic_access(priv);
 566         spin_unlock_irqrestore(&priv->lock, flags);
 567
 568         iwl4965_hw_card_show_info(priv);
 569
 570         /* end nic_init */
 571
 572         /* Allocate the RX queue, or reset if it is already allocated */
 573         if (!rxq->bd) {
 574                 rc = iwl4965_rx_queue_alloc(priv);
 575                 if (rc) {
 576                         IWL_ERROR("Unable to initialize Rx queue\n");
 577                         return -ENOMEM;
 578                 }
 579         } else
 580                 iwl4965_rx_queue_reset(priv, rxq);
 581
 582         iwl4965_rx_replenish(priv);
 583
 584         iwl4965_rx_init(priv, rxq);
 585
 586         spin_lock_irqsave(&priv->lock, flags);
 587
 588         rxq->need_update = 1;
 589         iwl4965_rx_queue_update_write_ptr(priv, rxq);
 590
 591         spin_unlock_irqrestore(&priv->lock, flags);
 592
 593         /* Allocate and init all Tx and Command queues */
 594         rc = iwl4965_txq_ctx_reset(priv);
 595         if (rc)
 596                 return rc;
 597
 598         if (priv->eeprom.sku_cap & EEPROM_SKU_CAP_SW_RF_KILL_ENABLE)
 599                 IWL_DEBUG_RF_KILL("SW RF KILL supported in EEPROM.\n");
 600
 601         if (priv->eeprom.sku_cap & EEPROM_SKU_CAP_HW_RF_KILL_ENABLE)
 602                 IWL_DEBUG_RF_KILL("HW RF KILL supported in EEPROM.\n");
 603
 604         set_bit(STATUS_INIT, &priv->status);
 605
 606         return 0;
 607 }
 608
 609 int iwl4965_hw_nic_stop_master(struct iwl4965_priv *priv)
 610 {
 611         int rc = 0;
 612         u32 reg_val;
 613         unsigned long flags;
 614
 615         spin_lock_irqsave(&priv->lock, flags);
 616
 617         /* set stop master bit */
 618         iwl4965_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
 619
 620         reg_val = iwl4965_read32(priv, CSR_GP_CNTRL);
 621
 622         if (CSR_GP_CNTRL_REG_FLAG_MAC_POWER_SAVE ==
 623             (reg_val & CSR_GP_CNTRL_REG_MSK_POWER_SAVE_TYPE))
 624                 IWL_DEBUG_INFO("Card in power save, master is already "
 625                                "stopped\n");
 626         else {
 627                 rc = iwl4965_poll_bit(priv, CSR_RESET,
 628                                   CSR_RESET_REG_FLAG_MASTER_DISABLED,
 629                                   CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
 630                 if (rc < 0) {
 631                         spin_unlock_irqrestore(&priv->lock, flags);
 632                         return rc;
 633                 }
 634         }
 635
 636         spin_unlock_irqrestore(&priv->lock, flags);
 637         IWL_DEBUG_INFO("stop master\n");
 638
 639         return rc;
 640 }
 641
 642 /**
 643  * iwl4965_hw_txq_ctx_stop - Stop all Tx DMA channels, free Tx queue memory
 644  */
 645 void iwl4965_hw_txq_ctx_stop(struct iwl4965_priv *priv)
 646 {
 647
 648         int txq_id;
 649         unsigned long flags;
 650
 651         /* Stop each Tx DMA channel, and wait for it to be idle */
 652         for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++) {
 653                 spin_lock_irqsave(&priv->lock, flags);
 654                 if (iwl4965_grab_nic_access(priv)) {
 655                         spin_unlock_irqrestore(&priv->lock, flags);
 656                         continue;
 657                 }
 658
 659                 iwl4965_write_direct32(priv,
 660                                      IWL_FH_TCSR_CHNL_TX_CONFIG_REG(txq_id),
 661                                      0x0);
 662                 iwl4965_poll_direct_bit(priv, IWL_FH_TSSR_TX_STATUS_REG,
 663                                         IWL_FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE
 664                                         (txq_id), 200);
 665                 iwl4965_release_nic_access(priv);
 666                 spin_unlock_irqrestore(&priv->lock, flags);
 667         }
 668
 669         /* Deallocate memory for all Tx queues */
 670         iwl4965_hw_txq_ctx_free(priv);
 671 }
 672
 673 int iwl4965_hw_nic_reset(struct iwl4965_priv *priv)
 674 {
 675         int rc = 0;
 676         unsigned long flags;
 677
 678         iwl4965_hw_nic_stop_master(priv);
 679
 680         spin_lock_irqsave(&priv->lock, flags);
 681
 682         iwl4965_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
 683
 684         udelay(10);
 685
 686         iwl4965_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 687         rc = iwl4965_poll_bit(priv, CSR_RESET,
 688                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
 689                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25);
 690
 691         udelay(10);
 692
 693         rc = iwl4965_grab_nic_access(priv);
 694         if (!rc) {
 695                 iwl4965_write_prph(priv, APMG_CLK_EN_REG,
 696                                          APMG_CLK_VAL_DMA_CLK_RQT |
 697                                          APMG_CLK_VAL_BSM_CLK_RQT);
 698
 699                 udelay(10);
 700
 701                 iwl4965_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
 702                                 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
 703
 704                 iwl4965_release_nic_access(priv);
 705         }
 706
 707         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
 708         wake_up_interruptible(&priv->wait_command_queue);
 709
 710         spin_unlock_irqrestore(&priv->lock, flags);
 711
 712         return rc;
 713
 714 }
 715
 716 #define REG_RECALIB_PERIOD (60)
 717
 718 /**
 719  * iwl4965_bg_statistics_periodic - Timer callback to queue statistics
 720  *
 721  * This callback is provided in order to queue the statistics_work
 722  * in work_queue context (v. softirq)
 723  *
 724  * This timer function is continually reset to execute within
 725  * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
 726  * was received.  We need to ensure we receive the statistics in order
 727  * to update the temperature used for calibrating the TXPOWER.  However,
 728  * we can't send the statistics command from softirq context (which
 729  * is the context which timers run at) so we have to queue off the
 730  * statistics_work to actually send the command to the hardware.
 731  */
 732 static void iwl4965_bg_statistics_periodic(unsigned long data)
 733 {
 734         struct iwl4965_priv *priv = (struct iwl4965_priv *)data;
 735
 736         queue_work(priv->workqueue, &priv->statistics_work);
 737 }
 738
 739 /**
 740  * iwl4965_bg_statistics_work - Send the statistics request to the hardware.
 741  *
 742  * This is queued by iwl4965_bg_statistics_periodic.
 743  */
 744 static void iwl4965_bg_statistics_work(struct work_struct *work)
 745 {
 746         struct iwl4965_priv *priv = container_of(work, struct iwl4965_priv,
 747                                              statistics_work);
 748
 749         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 750                 return;
 751
 752         mutex_lock(&priv->mutex);
 753         iwl4965_send_statistics_request(priv);
 754         mutex_unlock(&priv->mutex);
 755 }
 756
 757 #define CT_LIMIT_CONST          259
 758 #define TM_CT_KILL_THRESHOLD    110
 759
 760 void iwl4965_rf_kill_ct_config(struct iwl4965_priv *priv)
 761 {
 762         struct iwl4965_ct_kill_config cmd;
 763         u32 R1, R2, R3;
 764         u32 temp_th;
 765         u32 crit_temperature;
 766         unsigned long flags;
 767         int rc = 0;
 768
 769         spin_lock_irqsave(&priv->lock, flags);
 770         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_CLR,
 771                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
 772         spin_unlock_irqrestore(&priv->lock, flags);
 773
 774         if (priv->statistics.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK) {
 775                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[1]);
 776                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[1]);
 777                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[1]);
 778         } else {
 779                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[0]);
 780                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[0]);
 781                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[0]);
 782         }
 783
 784         temp_th = CELSIUS_TO_KELVIN(TM_CT_KILL_THRESHOLD);
 785
 786         crit_temperature = ((temp_th * (R3-R1))/CT_LIMIT_CONST) + R2;
 787         cmd.critical_temperature_R =  cpu_to_le32(crit_temperature);
 788         rc = iwl4965_send_cmd_pdu(priv,
 789                               REPLY_CT_KILL_CONFIG_CMD, sizeof(cmd), &cmd);
 790         if (rc)
 791                 IWL_ERROR("REPLY_CT_KILL_CONFIG_CMD failed\n");
 792         else
 793                 IWL_DEBUG_INFO("REPLY_CT_KILL_CONFIG_CMD succeeded\n");
 794 }
 795
 796 #ifdef CONFIG_IWL4965_SENSITIVITY
 797
 798 /* "false alarms" are signals that our DSP tries to lock onto,
 799  *   but then determines that they are either noise, or transmissions
 800  *   from a distant wireless network (also "noise", really) that get
 801  *   "stepped on" by stronger transmissions within our own network.
 802  * This algorithm attempts to set a sensitivity level that is high
 803  *   enough to receive all of our own network traffic, but not so
 804  *   high that our DSP gets too busy trying to lock onto non-network
 805  *   activity/noise. */
 806 static int iwl4965_sens_energy_cck(struct iwl4965_priv *priv,
 807                                    u32 norm_fa,
 808                                    u32 rx_enable_time,
 809                                    struct statistics_general_data *rx_info)
 810 {
 811         u32 max_nrg_cck = 0;
 812         int i = 0;
 813         u8 max_silence_rssi = 0;
 814         u32 silence_ref = 0;
 815         u8 silence_rssi_a = 0;
 816         u8 silence_rssi_b = 0;
 817         u8 silence_rssi_c = 0;
 818         u32 val;
 819
 820         /* "false_alarms" values below are cross-multiplications to assess the
 821          *   numbers of false alarms within the measured period of actual Rx
 822          *   (Rx is off when we're txing), vs the min/max expected false alarms
 823          *   (some should be expected if rx is sensitive enough) in a
 824          *   hypothetical listening period of 200 time units (TU), 204.8 msec:
 825          *
 826          * MIN_FA/fixed-time < false_alarms/actual-rx-time < MAX_FA/beacon-time
 827          *
 828          * */
 829         u32 false_alarms = norm_fa * 200 * 1024;
 830         u32 max_false_alarms = MAX_FA_CCK * rx_enable_time;
 831         u32 min_false_alarms = MIN_FA_CCK * rx_enable_time;
 832         struct iwl4965_sensitivity_data *data = NULL;
 833
 834         data = &(priv->sensitivity_data);
 835
 836         data->nrg_auto_corr_silence_diff = 0;
 837
 838         /* Find max silence rssi among all 3 receivers.
 839          * This is background noise, which may include transmissions from other
 840          *    networks, measured during silence before our network's beacon */
 841         silence_rssi_a = (u8)((rx_info->beacon_silence_rssi_a &
 842                             ALL_BAND_FILTER) >> 8);
 843         silence_rssi_b = (u8)((rx_info->beacon_silence_rssi_b &
 844                             ALL_BAND_FILTER) >> 8);
 845         silence_rssi_c = (u8)((rx_info->beacon_silence_rssi_c &
 846                             ALL_BAND_FILTER) >> 8);
 847
 848         val = max(silence_rssi_b, silence_rssi_c);
 849         max_silence_rssi = max(silence_rssi_a, (u8) val);
 850
 851         /* Store silence rssi in 20-beacon history table */
 852         data->nrg_silence_rssi[data->nrg_silence_idx] = max_silence_rssi;
 853         data->nrg_silence_idx++;
 854         if (data->nrg_silence_idx >= NRG_NUM_PREV_STAT_L)
 855                 data->nrg_silence_idx = 0;
 856
 857         /* Find max silence rssi across 20 beacon history */
 858         for (i = 0; i < NRG_NUM_PREV_STAT_L; i++) {
 859                 val = data->nrg_silence_rssi[i];
 860                 silence_ref = max(silence_ref, val);
 861         }
 862         IWL_DEBUG_CALIB("silence a %u, b %u, c %u, 20-bcn max %u\n",
 863                         silence_rssi_a, silence_rssi_b, silence_rssi_c,
 864                         silence_ref);
 865
 866         /* Find max rx energy (min value!) among all 3 receivers,
 867          *   measured during beacon frame.
 868          * Save it in 10-beacon history table. */
 869         i = data->nrg_energy_idx;
 870         val = min(rx_info->beacon_energy_b, rx_info->beacon_energy_c);
 871         data->nrg_value[i] = min(rx_info->beacon_energy_a, val);
 872
 873         data->nrg_energy_idx++;
 874         if (data->nrg_energy_idx >= 10)
 875                 data->nrg_energy_idx = 0;
 876
 877         /* Find min rx energy (max value) across 10 beacon history.
 878          * This is the minimum signal level that we want to receive well.
 879          * Add backoff (margin so we don't miss slightly lower energy frames).
 880          * This establishes an upper bound (min value) for energy threshold. */
 881         max_nrg_cck = data->nrg_value[0];
 882         for (i = 1; i < 10; i++)
 883                 max_nrg_cck = (u32) max(max_nrg_cck, (data->nrg_value[i]));
 884         max_nrg_cck += 6;
 885
 886         IWL_DEBUG_CALIB("rx energy a %u, b %u, c %u, 10-bcn max/min %u\n",
 887                         rx_info->beacon_energy_a, rx_info->beacon_energy_b,
 888                         rx_info->beacon_energy_c, max_nrg_cck - 6);
 889
 890         /* Count number of consecutive beacons with fewer-than-desired
 891          *   false alarms. */
 892         if (false_alarms < min_false_alarms)
 893                 data->num_in_cck_no_fa++;
 894         else
 895                 data->num_in_cck_no_fa = 0;
 896         IWL_DEBUG_CALIB("consecutive bcns with few false alarms = %u\n",
 897                         data->num_in_cck_no_fa);
 898
 899         /* If we got too many false alarms this time, reduce sensitivity */
 900         if (false_alarms > max_false_alarms) {
 901                 IWL_DEBUG_CALIB("norm FA %u > max FA %u\n",
 902                              false_alarms, max_false_alarms);
 903                 IWL_DEBUG_CALIB("... reducing sensitivity\n");
 904                 data->nrg_curr_state = IWL_FA_TOO_MANY;
 905
 906                 if (data->auto_corr_cck > AUTO_CORR_MAX_TH_CCK) {
 907                         /* Store for "fewer than desired" on later beacon */
 908                         data->nrg_silence_ref = silence_ref;
 909
 910                         /* increase energy threshold (reduce nrg value)
 911                          *   to decrease sensitivity */
 912                         if (data->nrg_th_cck > (NRG_MAX_CCK + NRG_STEP_CCK))
 913                                 data->nrg_th_cck = data->nrg_th_cck
 914                                                          - NRG_STEP_CCK;
 915                 }
 916
 917                 /* increase auto_corr values to decrease sensitivity */
 918                 if (data->auto_corr_cck < AUTO_CORR_MAX_TH_CCK)
 919                         data->auto_corr_cck = AUTO_CORR_MAX_TH_CCK + 1;
 920                 else {
 921                         val = data->auto_corr_cck + AUTO_CORR_STEP_CCK;
 922                         data->auto_corr_cck = min((u32)AUTO_CORR_MAX_CCK, val);
 923                 }
 924                 val = data->auto_corr_cck_mrc + AUTO_CORR_STEP_CCK;
 925                 data->auto_corr_cck_mrc = min((u32)AUTO_CORR_MAX_CCK_MRC, val);
 926
 927         /* Else if we got fewer than desired, increase sensitivity */
 928         } else if (false_alarms < min_false_alarms) {
 929                 data->nrg_curr_state = IWL_FA_TOO_FEW;
 930
 931                 /* Compare silence level with silence level for most recent
 932                  *   healthy number or too many false alarms */
 933                 data->nrg_auto_corr_silence_diff = (s32)data->nrg_silence_ref -
 934                                                    (s32)silence_ref;
 935
 936                 IWL_DEBUG_CALIB("norm FA %u < min FA %u, silence diff %d\n",
 937                          false_alarms, min_false_alarms,
 938                          data->nrg_auto_corr_silence_diff);
 939
 940                 /* Increase value to increase sensitivity, but only if:
 941                  * 1a) previous beacon did *not* have *too many* false alarms
 942                  * 1b) AND there's a significant difference in Rx levels
 943                  *      from a previous beacon with too many, or healthy # FAs
 944                  * OR 2) We've seen a lot of beacons (100) with too few
 945                  *       false alarms */
 946                 if ((data->nrg_prev_state != IWL_FA_TOO_MANY) &&
 947                         ((data->nrg_auto_corr_silence_diff > NRG_DIFF) ||
 948                         (data->num_in_cck_no_fa > MAX_NUMBER_CCK_NO_FA))) {
 949
 950                         IWL_DEBUG_CALIB("... increasing sensitivity\n");
 951                         /* Increase nrg value to increase sensitivity */
 952                         val = data->nrg_th_cck + NRG_STEP_CCK;
 953                         data->nrg_th_cck = min((u32)NRG_MIN_CCK, val);
 954
 955                         /* Decrease auto_corr values to increase sensitivity */
 956                         val = data->auto_corr_cck - AUTO_CORR_STEP_CCK;
 957                         data->auto_corr_cck = max((u32)AUTO_CORR_MIN_CCK, val);
 958
 959                         val = data->auto_corr_cck_mrc - AUTO_CORR_STEP_CCK;
 960                         data->auto_corr_cck_mrc =
 961                                          max((u32)AUTO_CORR_MIN_CCK_MRC, val);
 962
 963                 } else
 964                         IWL_DEBUG_CALIB("... but not changing sensitivity\n");
 965
 966         /* Else we got a healthy number of false alarms, keep status quo */
 967         } else {
 968                 IWL_DEBUG_CALIB(" FA in safe zone\n");
 969                 data->nrg_curr_state = IWL_FA_GOOD_RANGE;
 970
 971                 /* Store for use in "fewer than desired" with later beacon */
 972                 data->nrg_silence_ref = silence_ref;
 973
 974                 /* If previous beacon had too many false alarms,
 975                  *   give it some extra margin by reducing sensitivity again
 976                  *   (but don't go below measured energy of desired Rx) */
 977                 if (IWL_FA_TOO_MANY == data->nrg_prev_state) {
 978                         IWL_DEBUG_CALIB("... increasing margin\n");
 979                         data->nrg_th_cck -= NRG_MARGIN;
 980                 }
 981         }
 982
 983         /* Make sure the energy threshold does not go above the measured
 984          * energy of the desired Rx signals (reduced by backoff margin),
 985          * or else we might start missing Rx frames.
 986          * Lower value is higher energy, so we use max()!
 987          */
 988         data->nrg_th_cck = max(max_nrg_cck, data->nrg_th_cck);
 989         IWL_DEBUG_CALIB("new nrg_th_cck %u\n", data->nrg_th_cck);
 990
 991         data->nrg_prev_state = data->nrg_curr_state;
 992
 993         return 0;
 994 }
 995
 996
 997 static int iwl4965_sens_auto_corr_ofdm(struct iwl4965_priv *priv,
 998                                        u32 norm_fa,
 999                                        u32 rx_enable_time)
1000 {
1001         u32 val;
1002         u32 false_alarms = norm_fa * 200 * 1024;
1003         u32 max_false_alarms = MAX_FA_OFDM * rx_enable_time;
1004         u32 min_false_alarms = MIN_FA_OFDM * rx_enable_time;
1005         struct iwl4965_sensitivity_data *data = NULL;
1006
1007         data = &(priv->sensitivity_data);
1008
1009         /* If we got too many false alarms this time, reduce sensitivity */
1010         if (false_alarms > max_false_alarms) {
1011
1012                 IWL_DEBUG_CALIB("norm FA %u > max FA %u)\n",
1013                              false_alarms, max_false_alarms);
1014
1015                 val = data->auto_corr_ofdm + AUTO_CORR_STEP_OFDM;
1016                 data->auto_corr_ofdm =
1017                                 min((u32)AUTO_CORR_MAX_OFDM, val);
1018
1019                 val = data->auto_corr_ofdm_mrc + AUTO_CORR_STEP_OFDM;
1020                 data->auto_corr_ofdm_mrc =
1021                                 min((u32)AUTO_CORR_MAX_OFDM_MRC, val);
1022
1023                 val = data->auto_corr_ofdm_x1 + AUTO_CORR_STEP_OFDM;
1024                 data->auto_corr_ofdm_x1 =
1025                                 min((u32)AUTO_CORR_MAX_OFDM_X1, val);
1026
1027                 val = data->auto_corr_ofdm_mrc_x1 + AUTO_CORR_STEP_OFDM;
1028                 data->auto_corr_ofdm_mrc_x1 =
1029                                 min((u32)AUTO_CORR_MAX_OFDM_MRC_X1, val);
1030         }
1031
1032         /* Else if we got fewer than desired, increase sensitivity */
1033         else if (false_alarms < min_false_alarms) {
1034
1035                 IWL_DEBUG_CALIB("norm FA %u < min FA %u\n",
1036                              false_alarms, min_false_alarms);
1037
1038                 val = data->auto_corr_ofdm - AUTO_CORR_STEP_OFDM;
1039                 data->auto_corr_ofdm =
1040                                 max((u32)AUTO_CORR_MIN_OFDM, val);
1041
1042                 val = data->auto_corr_ofdm_mrc - AUTO_CORR_STEP_OFDM;
1043                 data->auto_corr_ofdm_mrc =
1044                                 max((u32)AUTO_CORR_MIN_OFDM_MRC, val);
1045
1046                 val = data->auto_corr_ofdm_x1 - AUTO_CORR_STEP_OFDM;
1047                 data->auto_corr_ofdm_x1 =
1048                                 max((u32)AUTO_CORR_MIN_OFDM_X1, val);
1049
1050                 val = data->auto_corr_ofdm_mrc_x1 - AUTO_CORR_STEP_OFDM;
1051                 data->auto_corr_ofdm_mrc_x1 =
1052                                 max((u32)AUTO_CORR_MIN_OFDM_MRC_X1, val);
1053         }
1054
1055         else
1056                 IWL_DEBUG_CALIB("min FA %u < norm FA %u < max FA %u OK\n",
1057                          min_false_alarms, false_alarms, max_false_alarms);
1058
1059         return 0;
1060 }
1061
1062 static int iwl4965_sensitivity_callback(struct iwl4965_priv *priv,
1063                                     struct iwl4965_cmd *cmd, struct sk_buff *skb)
1064 {
1065         /* We didn't cache the SKB; let the caller free it */
1066         return 1;
1067 }
1068
1069 /* Prepare a SENSITIVITY_CMD, send to uCode if values have changed */
1070 static int iwl4965_sensitivity_write(struct iwl4965_priv *priv, u8 flags)
1071 {
1072         int rc = 0;
1073         struct iwl4965_sensitivity_cmd cmd ;
1074         struct iwl4965_sensitivity_data *data = NULL;
1075         struct iwl4965_host_cmd cmd_out = {
1076                 .id = SENSITIVITY_CMD,
1077                 .len = sizeof(struct iwl4965_sensitivity_cmd),
1078                 .meta.flags = flags,
1079                 .data = &cmd,
1080         };
1081
1082         data = &(priv->sensitivity_data);
1083
1084         memset(&cmd, 0, sizeof(cmd));
1085
1086         cmd.table[HD_AUTO_CORR32_X4_TH_ADD_MIN_INDEX] =
1087                                 cpu_to_le16((u16)data->auto_corr_ofdm);
1088         cmd.table[HD_AUTO_CORR32_X4_TH_ADD_MIN_MRC_INDEX] =
1089                                 cpu_to_le16((u16)data->auto_corr_ofdm_mrc);
1090         cmd.table[HD_AUTO_CORR32_X1_TH_ADD_MIN_INDEX] =
1091                                 cpu_to_le16((u16)data->auto_corr_ofdm_x1);
1092         cmd.table[HD_AUTO_CORR32_X1_TH_ADD_MIN_MRC_INDEX] =
1093                                 cpu_to_le16((u16)data->auto_corr_ofdm_mrc_x1);
1094
1095         cmd.table[HD_AUTO_CORR40_X4_TH_ADD_MIN_INDEX] =
1096                                 cpu_to_le16((u16)data->auto_corr_cck);
1097         cmd.table[HD_AUTO_CORR40_X4_TH_ADD_MIN_MRC_INDEX] =
1098                                 cpu_to_le16((u16)data->auto_corr_cck_mrc);
1099
1100         cmd.table[HD_MIN_ENERGY_CCK_DET_INDEX] =
1101                                 cpu_to_le16((u16)data->nrg_th_cck);
1102         cmd.table[HD_MIN_ENERGY_OFDM_DET_INDEX] =
1103                                 cpu_to_le16((u16)data->nrg_th_ofdm);
1104
1105         cmd.table[HD_BARKER_CORR_TH_ADD_MIN_INDEX] =
1106                                 __constant_cpu_to_le16(190);
1107         cmd.table[HD_BARKER_CORR_TH_ADD_MIN_MRC_INDEX] =
1108                                 __constant_cpu_to_le16(390);
1109         cmd.table[HD_OFDM_ENERGY_TH_IN_INDEX] =
1110                                 __constant_cpu_to_le16(62);
1111
1112         IWL_DEBUG_CALIB("ofdm: ac %u mrc %u x1 %u mrc_x1 %u thresh %u\n",
1113                         data->auto_corr_ofdm, data->auto_corr_ofdm_mrc,
1114                         data->auto_corr_ofdm_x1, data->auto_corr_ofdm_mrc_x1,
1115                         data->nrg_th_ofdm);
1116
1117         IWL_DEBUG_CALIB("cck: ac %u mrc %u thresh %u\n",
1118                         data->auto_corr_cck, data->auto_corr_cck_mrc,
1119                         data->nrg_th_cck);
1120
1121         /* Update uCode's "work" table, and copy it to DSP */
1122         cmd.control = SENSITIVITY_CMD_CONTROL_WORK_TABLE;
1123
1124         if (flags & CMD_ASYNC)
1125                 cmd_out.meta.u.callback = iwl4965_sensitivity_callback;
1126
1127         /* Don't send command to uCode if nothing has changed */
1128         if (!memcmp(&cmd.table[0], &(priv->sensitivity_tbl[0]),
1129                     sizeof(u16)*HD_TABLE_SIZE)) {
1130                 IWL_DEBUG_CALIB("No change in SENSITIVITY_CMD\n");
1131                 return 0;
1132         }
1133
1134         /* Copy table for comparison next time */
1135         memcpy(&(priv->sensitivity_tbl[0]), &(cmd.table[0]),
1136                sizeof(u16)*HD_TABLE_SIZE);
1137
1138         rc = iwl4965_send_cmd(priv, &cmd_out);
1139         if (!rc) {
1140                 IWL_DEBUG_CALIB("SENSITIVITY_CMD succeeded\n");
1141                 return rc;
1142         }
1143
1144         return 0;
1145 }
1146
1147 void iwl4965_init_sensitivity(struct iwl4965_priv *priv, u8 flags, u8 force)
1148 {
1149         int rc = 0;
1150         int i;
1151         struct iwl4965_sensitivity_data *data = NULL;
1152
1153         IWL_DEBUG_CALIB("Start iwl4965_init_sensitivity\n");
1154
1155         if (force)
1156                 memset(&(priv->sensitivity_tbl[0]), 0,
1157                         sizeof(u16)*HD_TABLE_SIZE);
1158
1159         /* Clear driver's sensitivity algo data */
1160         data = &(priv->sensitivity_data);
1161         memset(data, 0, sizeof(struct iwl4965_sensitivity_data));
1162
1163         data->num_in_cck_no_fa = 0;
1164         data->nrg_curr_state = IWL_FA_TOO_MANY;
1165         data->nrg_prev_state = IWL_FA_TOO_MANY;
1166         data->nrg_silence_ref = 0;
1167         data->nrg_silence_idx = 0;
1168         data->nrg_energy_idx = 0;
1169
1170         for (i = 0; i < 10; i++)
1171                 data->nrg_value[i] = 0;
1172
1173         for (i = 0; i < NRG_NUM_PREV_STAT_L; i++)
1174                 data->nrg_silence_rssi[i] = 0;
1175
1176         data->auto_corr_ofdm = 90;
1177         data->auto_corr_ofdm_mrc = 170;
1178         data->auto_corr_ofdm_x1  = 105;
1179         data->auto_corr_ofdm_mrc_x1 = 220;
1180         data->auto_corr_cck = AUTO_CORR_CCK_MIN_VAL_DEF;
1181         data->auto_corr_cck_mrc = 200;
1182         data->nrg_th_cck = 100;
1183         data->nrg_th_ofdm = 100;
1184
1185         data->last_bad_plcp_cnt_ofdm = 0;
1186         data->last_fa_cnt_ofdm = 0;
1187         data->last_bad_plcp_cnt_cck = 0;
1188         data->last_fa_cnt_cck = 0;
1189
1190         /* Clear prior Sensitivity command data to force send to uCode */
1191         if (force)
1192                 memset(&(priv->sensitivity_tbl[0]), 0,
1193                     sizeof(u16)*HD_TABLE_SIZE);
1194
1195         rc |= iwl4965_sensitivity_write(priv, flags);
1196         IWL_DEBUG_CALIB("<<return 0x%X\n", rc);
1197
1198         return;
1199 }
1200
1201
1202 /* Reset differential Rx gains in NIC to prepare for chain noise calibration.
1203  * Called after every association, but this runs only once!
1204  *  ... once chain noise is calibrated the first time, it's good forever.  */
1205 void iwl4965_chain_noise_reset(struct iwl4965_priv *priv)
1206 {
1207         struct iwl4965_chain_noise_data *data = NULL;
1208         int rc = 0;
1209
1210         data = &(priv->chain_noise_data);
1211         if ((data->state == IWL_CHAIN_NOISE_ALIVE) && iwl4965_is_associated(priv)) {
1212                 struct iwl4965_calibration_cmd cmd;
1213
1214                 memset(&cmd, 0, sizeof(cmd));
1215                 cmd.opCode = PHY_CALIBRATE_DIFF_GAIN_CMD;
1216                 cmd.diff_gain_a = 0;
1217                 cmd.diff_gain_b = 0;
1218                 cmd.diff_gain_c = 0;
1219                 rc = iwl4965_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
1220                                  sizeof(cmd), &cmd);
1221                 msleep(4);
1222                 data->state = IWL_CHAIN_NOISE_ACCUMULATE;
1223                 IWL_DEBUG_CALIB("Run chain_noise_calibrate\n");
1224         }
1225         return;
1226 }
1227
1228 /*
1229  * Accumulate 20 beacons of signal and noise statistics for each of
1230  *   3 receivers/antennas/rx-chains, then figure out:
1231  * 1)  Which antennas are connected.
1232  * 2)  Differential rx gain settings to balance the 3 receivers.
1233  */
1234 static void iwl4965_noise_calibration(struct iwl4965_priv *priv,
1235                                       struct iwl4965_notif_statistics *stat_resp)
1236 {
1237         struct iwl4965_chain_noise_data *data = NULL;
1238         int rc = 0;
1239
1240         u32 chain_noise_a;
1241         u32 chain_noise_b;
1242         u32 chain_noise_c;
1243         u32 chain_sig_a;
1244         u32 chain_sig_b;
1245         u32 chain_sig_c;
1246         u32 average_sig[NUM_RX_CHAINS] = {INITIALIZATION_VALUE};
1247         u32 average_noise[NUM_RX_CHAINS] = {INITIALIZATION_VALUE};
1248         u32 max_average_sig;
1249         u16 max_average_sig_antenna_i;
1250         u32 min_average_noise = MIN_AVERAGE_NOISE_MAX_VALUE;
1251         u16 min_average_noise_antenna_i = INITIALIZATION_VALUE;
1252         u16 i = 0;
1253         u16 chan_num = INITIALIZATION_VALUE;
1254         u32 band = INITIALIZATION_VALUE;
1255         u32 active_chains = 0;
1256         unsigned long flags;
1257         struct statistics_rx_non_phy *rx_info = &(stat_resp->rx.general);
1258
1259         data = &(priv->chain_noise_data);
1260
1261         /* Accumulate just the first 20 beacons after the first association,
1262          *   then we're done forever. */
1263         if (data->state != IWL_CHAIN_NOISE_ACCUMULATE) {
1264                 if (data->state == IWL_CHAIN_NOISE_ALIVE)
1265                         IWL_DEBUG_CALIB("Wait for noise calib reset\n");
1266                 return;
1267         }
1268
1269         spin_lock_irqsave(&priv->lock, flags);
1270         if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) {
1271                 IWL_DEBUG_CALIB(" << Interference data unavailable\n");
1272                 spin_unlock_irqrestore(&priv->lock, flags);
1273                 return;
1274         }
1275
1276         band = (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) ? 0 : 1;
1277         chan_num = le16_to_cpu(priv->staging_rxon.channel);
1278
1279         /* Make sure we accumulate data for just the associated channel
1280          *   (even if scanning). */
1281         if ((chan_num != (le32_to_cpu(stat_resp->flag) >> 16)) ||
1282             ((STATISTICS_REPLY_FLG_BAND_24G_MSK ==
1283              (stat_resp->flag & STATISTICS_REPLY_FLG_BAND_24G_MSK)) && band)) {
1284                 IWL_DEBUG_CALIB("Stats not from chan=%d, band=%d\n",
1285                                 chan_num, band);
1286                 spin_unlock_irqrestore(&priv->lock, flags);
1287                 return;
1288         }
1289
1290         /* Accumulate beacon statistics values across 20 beacons */
1291         chain_noise_a = le32_to_cpu(rx_info->beacon_silence_rssi_a) &
1292                                 IN_BAND_FILTER;
1293         chain_noise_b = le32_to_cpu(rx_info->beacon_silence_rssi_b) &
1294                                 IN_BAND_FILTER;
1295         chain_noise_c = le32_to_cpu(rx_info->beacon_silence_rssi_c) &
1296                                 IN_BAND_FILTER;
1297
1298         chain_sig_a = le32_to_cpu(rx_info->beacon_rssi_a) & IN_BAND_FILTER;
1299         chain_sig_b = le32_to_cpu(rx_info->beacon_rssi_b) & IN_BAND_FILTER;
1300         chain_sig_c = le32_to_cpu(rx_info->beacon_rssi_c) & IN_BAND_FILTER;
1301
1302         spin_unlock_irqrestore(&priv->lock, flags);
1303
1304         data->beacon_count++;
1305
1306         data->chain_noise_a = (chain_noise_a + data->chain_noise_a);
1307         data->chain_noise_b = (chain_noise_b + data->chain_noise_b);
1308         data->chain_noise_c = (chain_noise_c + data->chain_noise_c);
1309
1310         data->chain_signal_a = (chain_sig_a + data->chain_signal_a);
1311         data->chain_signal_b = (chain_sig_b + data->chain_signal_b);
1312         data->chain_signal_c = (chain_sig_c + data->chain_signal_c);
1313
1314         IWL_DEBUG_CALIB("chan=%d, band=%d, beacon=%d\n", chan_num, band,
1315                         data->beacon_count);
1316         IWL_DEBUG_CALIB("chain_sig: a %d b %d c %d\n",
1317                         chain_sig_a, chain_sig_b, chain_sig_c);
1318         IWL_DEBUG_CALIB("chain_noise: a %d b %d c %d\n",
1319                         chain_noise_a, chain_noise_b, chain_noise_c);
1320
1321         /* If this is the 20th beacon, determine:
1322          * 1)  Disconnected antennas (using signal strengths)
1323          * 2)  Differential gain (using silence noise) to balance receivers */
1324         if (data->beacon_count == CAL_NUM_OF_BEACONS) {
1325
1326                 /* Analyze signal for disconnected antenna */
1327                 average_sig[0] = (data->chain_signal_a) / CAL_NUM_OF_BEACONS;
1328                 average_sig[1] = (data->chain_signal_b) / CAL_NUM_OF_BEACONS;
1329                 average_sig[2] = (data->chain_signal_c) / CAL_NUM_OF_BEACONS;
1330
1331                 if (average_sig[0] >= average_sig[1]) {
1332                         max_average_sig = average_sig[0];
1333                         max_average_sig_antenna_i = 0;
1334                         active_chains = (1 << max_average_sig_antenna_i);
1335                 } else {
1336                         max_average_sig = average_sig[1];
1337                         max_average_sig_antenna_i = 1;
1338                         active_chains = (1 << max_average_sig_antenna_i);
1339                 }
1340
1341                 if (average_sig[2] >= max_average_sig) {
1342                         max_average_sig = average_sig[2];
1343                         max_average_sig_antenna_i = 2;
1344                         active_chains = (1 << max_average_sig_antenna_i);
1345                 }
1346
1347                 IWL_DEBUG_CALIB("average_sig: a %d b %d c %d\n",
1348                              average_sig[0], average_sig[1], average_sig[2]);
1349                 IWL_DEBUG_CALIB("max_average_sig = %d, antenna %d\n",
1350                              max_average_sig, max_average_sig_antenna_i);
1351
1352                 /* Compare signal strengths for all 3 receivers. */
1353                 for (i = 0; i < NUM_RX_CHAINS; i++) {
1354                         if (i != max_average_sig_antenna_i) {
1355                                 s32 rssi_delta = (max_average_sig -
1356                                                   average_sig[i]);
1357
1358                                 /* If signal is very weak, compared with
1359                                  * strongest, mark it as disconnected. */
1360                                 if (rssi_delta > MAXIMUM_ALLOWED_PATHLOSS)
1361                                         data->disconn_array[i] = 1;
1362                                 else
1363                                         active_chains |= (1 << i);
1364                         IWL_DEBUG_CALIB("i = %d  rssiDelta = %d  "
1365                                      "disconn_array[i] = %d\n",
1366                                      i, rssi_delta, data->disconn_array[i]);
1367                         }
1368                 }
1369
1370                 /*If both chains A & B are disconnected -
1371                  * connect B and leave A as is */
1372                 if (data->disconn_array[CHAIN_A] &&
1373                     data->disconn_array[CHAIN_B]) {
1374                         data->disconn_array[CHAIN_B] = 0;
1375                         active_chains |= (1 << CHAIN_B);
1376                         IWL_DEBUG_CALIB("both A & B chains are disconnected! "
1377                                      "W/A - declare B as connected\n");
1378                 }
1379
1380                 IWL_DEBUG_CALIB("active_chains (bitwise) = 0x%x\n",
1381                                 active_chains);
1382
1383                 /* Save for use within RXON, TX, SCAN commands, etc. */
1384                 priv->valid_antenna = active_chains;
1385
1386                 /* Analyze noise for rx balance */
1387                 average_noise[0] = ((data->chain_noise_a)/CAL_NUM_OF_BEACONS);
1388                 average_noise[1] = ((data->chain_noise_b)/CAL_NUM_OF_BEACONS);
1389                 average_noise[2] = ((data->chain_noise_c)/CAL_NUM_OF_BEACONS);
1390
1391                 for (i = 0; i < NUM_RX_CHAINS; i++) {
1392                         if (!(data->disconn_array[i]) &&
1393                            (average_noise[i] <= min_average_noise)) {
1394                                 /* This means that chain i is active and has
1395                                  * lower noise values so far: */
1396                                 min_average_noise = average_noise[i];
1397                                 min_average_noise_antenna_i = i;
1398                         }
1399                 }
1400
1401                 data->delta_gain_code[min_average_noise_antenna_i] = 0;
1402
1403                 IWL_DEBUG_CALIB("average_noise: a %d b %d c %d\n",
1404                                 average_noise[0], average_noise[1],
1405                                 average_noise[2]);
1406
1407                 IWL_DEBUG_CALIB("min_average_noise = %d, antenna %d\n",
1408                                 min_average_noise, min_average_noise_antenna_i);
1409
1410                 for (i = 0; i < NUM_RX_CHAINS; i++) {
1411                         s32 delta_g = 0;
1412
1413                         if (!(data->disconn_array[i]) &&
1414                             (data->delta_gain_code[i] ==
1415                              CHAIN_NOISE_DELTA_GAIN_INIT_VAL)) {
1416                                 delta_g = average_noise[i] - min_average_noise;
1417                                 data->delta_gain_code[i] = (u8)((delta_g *
1418                                                                     10) / 15);
1419                                 if (CHAIN_NOISE_MAX_DELTA_GAIN_CODE <
1420                                    data->delta_gain_code[i])
1421                                         data->delta_gain_code[i] =
1422                                           CHAIN_NOISE_MAX_DELTA_GAIN_CODE;
1423
1424                                 data->delta_gain_code[i] =
1425                                         (data->delta_gain_code[i] | (1 << 2));
1426                         } else
1427                                 data->delta_gain_code[i] = 0;
1428                 }
1429                 IWL_DEBUG_CALIB("delta_gain_codes: a %d b %d c %d\n",
1430                              data->delta_gain_code[0],
1431                              data->delta_gain_code[1],
1432                              data->delta_gain_code[2]);
1433
1434                 /* Differential gain gets sent to uCode only once */
1435                 if (!data->radio_write) {
1436                         struct iwl4965_calibration_cmd cmd;
1437                         data->radio_write = 1;
1438
1439                         memset(&cmd, 0, sizeof(cmd));
1440                         cmd.opCode = PHY_CALIBRATE_DIFF_GAIN_CMD;
1441                         cmd.diff_gain_a = data->delta_gain_code[0];
1442                         cmd.diff_gain_b = data->delta_gain_code[1];
1443                         cmd.diff_gain_c = data->delta_gain_code[2];
1444                         rc = iwl4965_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
1445                                               sizeof(cmd), &cmd);
1446                         if (rc)
1447                                 IWL_DEBUG_CALIB("fail sending cmd "
1448                                              "REPLY_PHY_CALIBRATION_CMD \n");
1449
1450                         /* TODO we might want recalculate
1451                          * rx_chain in rxon cmd */
1452
1453                         /* Mark so we run this algo only once! */
1454                         data->state = IWL_CHAIN_NOISE_CALIBRATED;
1455                 }
1456                 data->chain_noise_a = 0;
1457                 data->chain_noise_b = 0;
1458                 data->chain_noise_c = 0;
1459                 data->chain_signal_a = 0;
1460                 data->chain_signal_b = 0;
1461                 data->chain_signal_c = 0;
1462                 data->beacon_count = 0;
1463         }
1464         return;
1465 }
1466
1467 static void iwl4965_sensitivity_calibration(struct iwl4965_priv *priv,
1468                                             struct iwl4965_notif_statistics *resp)
1469 {
1470         int rc = 0;
1471         u32 rx_enable_time;
1472         u32 fa_cck;
1473         u32 fa_ofdm;
1474         u32 bad_plcp_cck;
1475         u32 bad_plcp_ofdm;
1476         u32 norm_fa_ofdm;
1477         u32 norm_fa_cck;
1478         struct iwl4965_sensitivity_data *data = NULL;
1479         struct statistics_rx_non_phy *rx_info = &(resp->rx.general);
1480         struct statistics_rx *statistics = &(resp->rx);
1481         unsigned long flags;
1482         struct statistics_general_data statis;
1483
1484         data = &(priv->sensitivity_data);
1485
1486         if (!iwl4965_is_associated(priv)) {
1487                 IWL_DEBUG_CALIB("<< - not associated\n");
1488                 return;
1489         }
1490
1491         spin_lock_irqsave(&priv->lock, flags);
1492         if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) {
1493                 IWL_DEBUG_CALIB("<< invalid data.\n");
1494                 spin_unlock_irqrestore(&priv->lock, flags);
1495                 return;
1496         }
1497
1498         /* Extract Statistics: */
1499         rx_enable_time = le32_to_cpu(rx_info->channel_load);
1500         fa_cck = le32_to_cpu(statistics->cck.false_alarm_cnt);
1501         fa_ofdm = le32_to_cpu(statistics->ofdm.false_alarm_cnt);
1502         bad_plcp_cck = le32_to_cpu(statistics->cck.plcp_err);
1503         bad_plcp_ofdm = le32_to_cpu(statistics->ofdm.plcp_err);
1504
1505         statis.beacon_silence_rssi_a =
1506                         le32_to_cpu(statistics->general.beacon_silence_rssi_a);
1507         statis.beacon_silence_rssi_b =
1508                         le32_to_cpu(statistics->general.beacon_silence_rssi_b);
1509         statis.beacon_silence_rssi_c =
1510                         le32_to_cpu(statistics->general.beacon_silence_rssi_c);
1511         statis.beacon_energy_a =
1512                         le32_to_cpu(statistics->general.beacon_energy_a);
1513         statis.beacon_energy_b =
1514                         le32_to_cpu(statistics->general.beacon_energy_b);
1515         statis.beacon_energy_c =
1516                         le32_to_cpu(statistics->general.beacon_energy_c);
1517
1518         spin_unlock_irqrestore(&priv->lock, flags);
1519
1520         IWL_DEBUG_CALIB("rx_enable_time = %u usecs\n", rx_enable_time);
1521
1522         if (!rx_enable_time) {
1523                 IWL_DEBUG_CALIB("<< RX Enable Time == 0! \n");
1524                 return;
1525         }
1526
1527         /* These statistics increase monotonically, and do not reset
1528          *   at each beacon.  Calculate difference from last value, or just
1529          *   use the new statistics value if it has reset or wrapped around. */
1530         if (data->last_bad_plcp_cnt_cck > bad_plcp_cck)
1531                 data->last_bad_plcp_cnt_cck = bad_plcp_cck;
1532         else {
1533                 bad_plcp_cck -= data->last_bad_plcp_cnt_cck;
1534                 data->last_bad_plcp_cnt_cck += bad_plcp_cck;
1535         }
1536
1537         if (data->last_bad_plcp_cnt_ofdm > bad_plcp_ofdm)
1538                 data->last_bad_plcp_cnt_ofdm = bad_plcp_ofdm;
1539         else {
1540                 bad_plcp_ofdm -= data->last_bad_plcp_cnt_ofdm;
1541                 data->last_bad_plcp_cnt_ofdm += bad_plcp_ofdm;
1542         }
1543
1544         if (data->last_fa_cnt_ofdm > fa_ofdm)
1545                 data->last_fa_cnt_ofdm = fa_ofdm;
1546         else {
1547                 fa_ofdm -= data->last_fa_cnt_ofdm;
1548                 data->last_fa_cnt_ofdm += fa_ofdm;
1549         }
1550
1551         if (data->last_fa_cnt_cck > fa_cck)
1552                 data->last_fa_cnt_cck = fa_cck;
1553         else {
1554                 fa_cck -= data->last_fa_cnt_cck;
1555                 data->last_fa_cnt_cck += fa_cck;
1556         }
1557
1558         /* Total aborted signal locks */
1559         norm_fa_ofdm = fa_ofdm + bad_plcp_ofdm;
1560         norm_fa_cck = fa_cck + bad_plcp_cck;
1561
1562         IWL_DEBUG_CALIB("cck: fa %u badp %u  ofdm: fa %u badp %u\n", fa_cck,
1563                         bad_plcp_cck, fa_ofdm, bad_plcp_ofdm);
1564
1565         iwl4965_sens_auto_corr_ofdm(priv, norm_fa_ofdm, rx_enable_time);
1566         iwl4965_sens_energy_cck(priv, norm_fa_cck, rx_enable_time, &statis);
1567         rc |= iwl4965_sensitivity_write(priv, CMD_ASYNC);
1568
1569         return;
1570 }
1571
1572 static void iwl4965_bg_sensitivity_work(struct work_struct *work)
1573 {
1574         struct iwl4965_priv *priv = container_of(work, struct iwl4965_priv,
1575                         sensitivity_work);
1576
1577         mutex_lock(&priv->mutex);
1578
1579         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
1580             test_bit(STATUS_SCANNING, &priv->status)) {
1581                 mutex_unlock(&priv->mutex);
1582                 return;
1583         }
1584
1585         if (priv->start_calib) {
1586                 iwl4965_noise_calibration(priv, &priv->statistics);
1587
1588                 if (priv->sensitivity_data.state ==
1589                                         IWL_SENS_CALIB_NEED_REINIT) {
1590                         iwl4965_init_sensitivity(priv, CMD_ASYNC, 0);
1591                         priv->sensitivity_data.state = IWL_SENS_CALIB_ALLOWED;
1592                 } else
1593                         iwl4965_sensitivity_calibration(priv,
1594                                         &priv->statistics);
1595         }
1596
1597         mutex_unlock(&priv->mutex);
1598         return;
1599 }
1600 #endif /*CONFIG_IWL4965_SENSITIVITY*/
1601
1602 static void iwl4965_bg_txpower_work(struct work_struct *work)
1603 {
1604         struct iwl4965_priv *priv = container_of(work, struct iwl4965_priv,
1605                         txpower_work);
1606
1607         /* If a scan happened to start before we got here
1608          * then just return; the statistics notification will
1609          * kick off another scheduled work to compensate for
1610          * any temperature delta we missed here. */
1611         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
1612             test_bit(STATUS_SCANNING, &priv->status))
1613                 return;
1614
1615         mutex_lock(&priv->mutex);
1616
1617         /* Regardless of if we are assocaited, we must reconfigure the
1618          * TX power since frames can be sent on non-radar channels while
1619          * not associated */
1620         iwl4965_hw_reg_send_txpower(priv);
1621
1622         /* Update last_temperature to keep is_calib_needed from running
1623          * when it isn't needed... */
1624         priv->last_temperature = priv->temperature;
1625
1626         mutex_unlock(&priv->mutex);
1627 }
1628
1629 /*
1630  * Acquire priv->lock before calling this function !
1631  */
1632 static void iwl4965_set_wr_ptrs(struct iwl4965_priv *priv, int txq_id, u32 index)
1633 {
1634         iwl4965_write_direct32(priv, HBUS_TARG_WRPTR,
1635                              (index & 0xff) | (txq_id << 8));
1636         iwl4965_write_prph(priv, KDR_SCD_QUEUE_RDPTR(txq_id), index);
1637 }
1638
1639 /**
1640  * iwl4965_tx_queue_set_status - (optionally) start Tx/Cmd queue
1641  * @tx_fifo_id: Tx DMA/FIFO channel (range 0-7) that the queue will feed
1642  * @scd_retry: (1) Indicates queue will be used in aggregation mode
1643  *
1644  * NOTE:  Acquire priv->lock before calling this function !
1645  */
1646 static void iwl4965_tx_queue_set_status(struct iwl4965_priv *priv,
1647                                         struct iwl4965_tx_queue *txq,
1648                                         int tx_fifo_id, int scd_retry)
1649 {
1650         int txq_id = txq->q.id;
1651
1652         /* Find out whether to activate Tx queue */
1653         int active = test_bit(txq_id, &priv->txq_ctx_active_msk)?1:0;
1654
1655         /* Set up and activate */
1656         iwl4965_write_prph(priv, KDR_SCD_QUEUE_STATUS_BITS(txq_id),
1657                                  (active << SCD_QUEUE_STTS_REG_POS_ACTIVE) |
1658                                  (tx_fifo_id << SCD_QUEUE_STTS_REG_POS_TXF) |
1659                                  (scd_retry << SCD_QUEUE_STTS_REG_POS_WSL) |
1660                                  (scd_retry << SCD_QUEUE_STTS_REG_POS_SCD_ACK) |
1661                                  SCD_QUEUE_STTS_REG_MSK);
1662
1663         txq->sched_retry = scd_retry;
1664
1665         IWL_DEBUG_INFO("%s %s Queue %d on AC %d\n",
1666                        active ? "Activate" : "Deactivate",
1667                        scd_retry ? "BA" : "AC", txq_id, tx_fifo_id);
1668 }
1669
1670 static const u16 default_queue_to_tx_fifo[] = {
1671         IWL_TX_FIFO_AC3,
1672         IWL_TX_FIFO_AC2,
1673         IWL_TX_FIFO_AC1,
1674         IWL_TX_FIFO_AC0,
1675         IWL_CMD_FIFO_NUM,
1676         IWL_TX_FIFO_HCCA_1,
1677         IWL_TX_FIFO_HCCA_2
1678 };
1679
1680 static inline void iwl4965_txq_ctx_activate(struct iwl4965_priv *priv, int txq_id)
1681 {
1682         set_bit(txq_id, &priv->txq_ctx_active_msk);
1683 }
1684
1685 static inline void iwl4965_txq_ctx_deactivate(struct iwl4965_priv *priv, int txq_id)
1686 {
1687         clear_bit(txq_id, &priv->txq_ctx_active_msk);
1688 }
1689
1690 int iwl4965_alive_notify(struct iwl4965_priv *priv)
1691 {
1692         u32 a;
1693         int i = 0;
1694         unsigned long flags;
1695         int rc;
1696
1697         spin_lock_irqsave(&priv->lock, flags);
1698
1699 #ifdef CONFIG_IWL4965_SENSITIVITY
1700         memset(&(priv->sensitivity_data), 0,
1701                sizeof(struct iwl4965_sensitivity_data));
1702         memset(&(priv->chain_noise_data), 0,
1703                sizeof(struct iwl4965_chain_noise_data));
1704         for (i = 0; i < NUM_RX_CHAINS; i++)
1705                 priv->chain_noise_data.delta_gain_code[i] =
1706                                 CHAIN_NOISE_DELTA_GAIN_INIT_VAL;
1707 #endif /* CONFIG_IWL4965_SENSITIVITY*/
1708         rc = iwl4965_grab_nic_access(priv);
1709         if (rc) {
1710                 spin_unlock_irqrestore(&priv->lock, flags);
1711                 return rc;
1712         }
1713
1714         /* Clear 4965's internal Tx Scheduler data base */
1715         priv->scd_base_addr = iwl4965_read_prph(priv, KDR_SCD_SRAM_BASE_ADDR);
1716         a = priv->scd_base_addr + SCD_CONTEXT_DATA_OFFSET;
1717         for (; a < priv->scd_base_addr + SCD_TX_STTS_BITMAP_OFFSET; a += 4)
1718                 iwl4965_write_targ_mem(priv, a, 0);
1719         for (; a < priv->scd_base_addr + SCD_TRANSLATE_TBL_OFFSET; a += 4)
1720                 iwl4965_write_targ_mem(priv, a, 0);
1721         for (; a < sizeof(u16) * priv->hw_setting.max_txq_num; a += 4)
1722                 iwl4965_write_targ_mem(priv, a, 0);
1723
1724         /* Tel 4965 where to find Tx byte count tables */
1725         iwl4965_write_prph(priv, KDR_SCD_DRAM_BASE_ADDR,
1726                 (priv->hw_setting.shared_phys +
1727                  offsetof(struct iwl4965_shared, queues_byte_cnt_tbls)) >> 10);
1728
1729         /* Disable chain mode for all queues */
1730         iwl4965_write_prph(priv, KDR_SCD_QUEUECHAIN_SEL, 0);
1731
1732         /* Initialize each Tx queue (including the command queue) */
1733         for (i = 0; i < priv->hw_setting.max_txq_num; i++) {
1734
1735                 /* TFD circular buffer read/write indexes */
1736                 iwl4965_write_prph(priv, KDR_SCD_QUEUE_RDPTR(i), 0);
1737                 iwl4965_write_direct32(priv, HBUS_TARG_WRPTR, 0 | (i << 8));
1738
1739                 /* Max Tx Window size for Scheduler-ACK mode */
1740                 iwl4965_write_targ_mem(priv, priv->scd_base_addr +
1741                                         SCD_CONTEXT_QUEUE_OFFSET(i),
1742                                         (SCD_WIN_SIZE <<
1743                                         SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
1744                                         SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
1745
1746                 /* Frame limit */
1747                 iwl4965_write_targ_mem(priv, priv->scd_base_addr +
1748                                         SCD_CONTEXT_QUEUE_OFFSET(i) +
1749                                         sizeof(u32),
1750                                         (SCD_FRAME_LIMIT <<
1751                                         SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) &
1752                                         SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
1753
1754         }
1755         iwl4965_write_prph(priv, KDR_SCD_INTERRUPT_MASK,
1756                                  (1 << priv->hw_setting.max_txq_num) - 1);
1757
1758         /* Activate all Tx DMA/FIFO channels */
1759         iwl4965_write_prph(priv, KDR_SCD_TXFACT,
1760                                  SCD_TXFACT_REG_TXFIFO_MASK(0, 7));
1761
1762         iwl4965_set_wr_ptrs(priv, IWL_CMD_QUEUE_NUM, 0);
1763
1764         /* Map each Tx/cmd queue to its corresponding fifo */
1765         for (i = 0; i < ARRAY_SIZE(default_queue_to_tx_fifo); i++) {
1766                 int ac = default_queue_to_tx_fifo[i];
1767                 iwl4965_txq_ctx_activate(priv, i);
1768                 iwl4965_tx_queue_set_status(priv, &priv->txq[i], ac, 0);
1769         }
1770
1771         iwl4965_release_nic_access(priv);
1772         spin_unlock_irqrestore(&priv->lock, flags);
1773
1774         return 0;
1775 }
1776
1777 /**
1778  * iwl4965_hw_set_hw_setting
1779  *
1780  * Called when initializing driver
1781  */
1782 int iwl4965_hw_set_hw_setting(struct iwl4965_priv *priv)
1783 {
1784         /* Allocate area for Tx byte count tables and Rx queue status */
1785         priv->hw_setting.shared_virt =
1786             pci_alloc_consistent(priv->pci_dev,
1787                                  sizeof(struct iwl4965_shared),
1788                                  &priv->hw_setting.shared_phys);
1789
1790         if (!priv->hw_setting.shared_virt)
1791                 return -1;
1792
1793         memset(priv->hw_setting.shared_virt, 0, sizeof(struct iwl4965_shared));
1794
1795         priv->hw_setting.max_txq_num = iwl4965_param_queues_num;
1796         priv->hw_setting.ac_queue_count = AC_NUM;
1797         priv->hw_setting.tx_cmd_len = sizeof(struct iwl4965_tx_cmd);
1798         priv->hw_setting.max_rxq_size = RX_QUEUE_SIZE;
1799         priv->hw_setting.max_rxq_log = RX_QUEUE_SIZE_LOG;
1800         if (iwl4965_param_amsdu_size_8K)
1801                 priv->hw_setting.rx_buf_size = IWL_RX_BUF_SIZE_8K;
1802         else
1803                 priv->hw_setting.rx_buf_size = IWL_RX_BUF_SIZE_4K;
1804         priv->hw_setting.max_pkt_size = priv->hw_setting.rx_buf_size - 256;
1805         priv->hw_setting.max_stations = IWL4965_STATION_COUNT;
1806         priv->hw_setting.bcast_sta_id = IWL4965_BROADCAST_ID;
1807         return 0;
1808 }
1809
1810 /**
1811  * iwl4965_hw_txq_ctx_free - Free TXQ Context
1812  *
1813  * Destroy all TX DMA queues and structures
1814  */
1815 void iwl4965_hw_txq_ctx_free(struct iwl4965_priv *priv)
1816 {
1817         int txq_id;
1818
1819         /* Tx queues */
1820         for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++)
1821                 iwl4965_tx_queue_free(priv, &priv->txq[txq_id]);
1822
1823         /* Keep-warm buffer */
1824         iwl4965_kw_free(priv);
1825 }
1826
1827 /**
1828  * iwl4965_hw_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr]
1829  *
1830  * Does NOT advance any TFD circular buffer read/write indexes
1831  * Does NOT free the TFD itself (which is within circular buffer)
1832  */
1833 int iwl4965_hw_txq_free_tfd(struct iwl4965_priv *priv, struct iwl4965_tx_queue *txq)
1834 {
1835         struct iwl4965_tfd_frame *bd_tmp = (struct iwl4965_tfd_frame *)&txq->bd[0];
1836         struct iwl4965_tfd_frame *bd = &bd_tmp[txq->q.read_ptr];
1837         struct pci_dev *dev = priv->pci_dev;
1838         int i;
1839         int counter = 0;
1840         int index, is_odd;
1841
1842         /* Host command buffers stay mapped in memory, nothing to clean */
1843         if (txq->q.id == IWL_CMD_QUEUE_NUM)
1844                 return 0;
1845
1846         /* Sanity check on number of chunks */
1847         counter = IWL_GET_BITS(*bd, num_tbs);
1848         if (counter > MAX_NUM_OF_TBS) {
1849                 IWL_ERROR("Too many chunks: %i\n", counter);
1850                 /* @todo issue fatal error, it is quite serious situation */
1851                 return 0;
1852         }
1853
1854         /* Unmap chunks, if any.
1855          * TFD info for odd chunks is different format than for even chunks. */
1856         for (i = 0; i < counter; i++) {
1857                 index = i / 2;
1858                 is_odd = i & 0x1;
1859
1860                 if (is_odd)
1861                         pci_unmap_single(
1862                                 dev,
1863                                 IWL_GET_BITS(bd->pa[index], tb2_addr_lo16) |
1864                                 (IWL_GET_BITS(bd->pa[index],
1865                                               tb2_addr_hi20) << 16),
1866                                 IWL_GET_BITS(bd->pa[index], tb2_len),
1867                                 PCI_DMA_TODEVICE);
1868
1869                 else if (i > 0)
1870                         pci_unmap_single(dev,
1871                                          le32_to_cpu(bd->pa[index].tb1_addr),
1872                                          IWL_GET_BITS(bd->pa[index], tb1_len),
1873                                          PCI_DMA_TODEVICE);
1874
1875                 /* Free SKB, if any, for this chunk */
1876                 if (txq->txb[txq->q.read_ptr].skb[i]) {
1877                         struct sk_buff *skb = txq->txb[txq->q.read_ptr].skb[i];
1878
1879                         dev_kfree_skb(skb);
1880                         txq->txb[txq->q.read_ptr].skb[i] = NULL;
1881                 }
1882         }
1883         return 0;
1884 }
1885
1886 int iwl4965_hw_reg_set_txpower(struct iwl4965_priv *priv, s8 power)
1887 {
1888         IWL_ERROR("TODO: Implement iwl4965_hw_reg_set_txpower!\n");
1889         return -EINVAL;
1890 }
1891
1892 static s32 iwl4965_math_div_round(s32 num, s32 denom, s32 *res)
1893 {
1894         s32 sign = 1;
1895
1896         if (num < 0) {
1897                 sign = -sign;
1898                 num = -num;
1899         }
1900         if (denom < 0) {
1901                 sign = -sign;
1902                 denom = -denom;
1903         }
1904         *res = 1;
1905         *res = ((num * 2 + denom) / (denom * 2)) * sign;
1906
1907         return 1;
1908 }
1909
1910 /**
1911  * iwl4965_get_voltage_compensation - Power supply voltage comp for txpower
1912  *
1913  * Determines power supply voltage compensation for txpower calculations.
1914  * Returns number of 1/2-dB steps to subtract from gain table index,
1915  * to compensate for difference between power supply voltage during
1916  * factory measurements, vs. current power supply voltage.
1917  *
1918  * Voltage indication is higher for lower voltage.
1919  * Lower voltage requires more gain (lower gain table index).
1920  */
1921 static s32 iwl4965_get_voltage_compensation(s32 eeprom_voltage,
1922                                             s32 current_voltage)
1923 {
1924         s32 comp = 0;
1925
1926         if ((TX_POWER_IWL_ILLEGAL_VOLTAGE == eeprom_voltage) ||
1927             (TX_POWER_IWL_ILLEGAL_VOLTAGE == current_voltage))
1928                 return 0;
1929
1930         iwl4965_math_div_round(current_voltage - eeprom_voltage,
1931                                TX_POWER_IWL_VOLTAGE_CODES_PER_03V, &comp);
1932
1933         if (current_voltage > eeprom_voltage)
1934                 comp *= 2;
1935         if ((comp < -2) || (comp > 2))
1936                 comp = 0;
1937
1938         return comp;
1939 }
1940
1941 static const struct iwl4965_channel_info *
1942 iwl4965_get_channel_txpower_info(struct iwl4965_priv *priv, u8 phymode, u16 channel)
1943 {
1944         const struct iwl4965_channel_info *ch_info;
1945
1946         ch_info = iwl4965_get_channel_info(priv, phymode, channel);
1947
1948         if (!is_channel_valid(ch_info))
1949                 return NULL;
1950
1951         return ch_info;
1952 }
1953
1954 static s32 iwl4965_get_tx_atten_grp(u16 channel)
1955 {
1956         if (channel >= CALIB_IWL_TX_ATTEN_GR5_FCH &&
1957             channel <= CALIB_IWL_TX_ATTEN_GR5_LCH)
1958                 return CALIB_CH_GROUP_5;
1959
1960         if (channel >= CALIB_IWL_TX_ATTEN_GR1_FCH &&
1961             channel <= CALIB_IWL_TX_ATTEN_GR1_LCH)
1962                 return CALIB_CH_GROUP_1;
1963
1964         if (channel >= CALIB_IWL_TX_ATTEN_GR2_FCH &&
1965             channel <= CALIB_IWL_TX_ATTEN_GR2_LCH)
1966                 return CALIB_CH_GROUP_2;
1967
1968         if (channel >= CALIB_IWL_TX_ATTEN_GR3_FCH &&
1969             channel <= CALIB_IWL_TX_ATTEN_GR3_LCH)
1970                 return CALIB_CH_GROUP_3;
1971
1972         if (channel >= CALIB_IWL_TX_ATTEN_GR4_FCH &&
1973             channel <= CALIB_IWL_TX_ATTEN_GR4_LCH)
1974                 return CALIB_CH_GROUP_4;
1975
1976         IWL_ERROR("Can't find txatten group for channel %d.\n", channel);
1977         return -1;
1978 }
1979
1980 static u32 iwl4965_get_sub_band(const struct iwl4965_priv *priv, u32 channel)
1981 {
1982         s32 b = -1;
1983
1984         for (b = 0; b < EEPROM_TX_POWER_BANDS; b++) {
1985                 if (priv->eeprom.calib_info.band_info[b].ch_from == 0)
1986                         continue;
1987
1988                 if ((channel >= priv->eeprom.calib_info.band_info[b].ch_from)
1989                     && (channel <= priv->eeprom.calib_info.band_info[b].ch_to))
1990                         break;
1991         }
1992
1993         return b;
1994 }
1995
1996 static s32 iwl4965_interpolate_value(s32 x, s32 x1, s32 y1, s32 x2, s32 y2)
1997 {
1998         s32 val;
1999
2000         if (x2 == x1)
2001                 return y1;
2002         else {
2003                 iwl4965_math_div_round((x2 - x) * (y1 - y2), (x2 - x1), &val);
2004                 return val + y2;
2005         }
2006 }
2007
2008 /**
2009  * iwl4965_interpolate_chan - Interpolate factory measurements for one channel
2010  *
2011  * Interpolates factory measurements from the two sample channels within a
2012  * sub-band, to apply to channel of interest.  Interpolation is proportional to
2013  * differences in channel frequencies, which is proportional to differences
2014  * in channel number.
2015  */
2016 static int iwl4965_interpolate_chan(struct iwl4965_priv *priv, u32 channel,
2017                                     struct iwl4965_eeprom_calib_ch_info *chan_info)
2018 {
2019         s32 s = -1;
2020         u32 c;
2021         u32 m;
2022         const struct iwl4965_eeprom_calib_measure *m1;
2023         const struct iwl4965_eeprom_calib_measure *m2;
2024         struct iwl4965_eeprom_calib_measure *omeas;
2025         u32 ch_i1;
2026         u32 ch_i2;
2027
2028         s = iwl4965_get_sub_band(priv, channel);
2029         if (s >= EEPROM_TX_POWER_BANDS) {
2030                 IWL_ERROR("Tx Power can not find channel %d ", channel);
2031                 return -1;
2032         }
2033
2034         ch_i1 = priv->eeprom.calib_info.band_info[s].ch1.ch_num;
2035         ch_i2 = priv->eeprom.calib_info.band_info[s].ch2.ch_num;
2036         chan_info->ch_num = (u8) channel;
2037
2038         IWL_DEBUG_TXPOWER("channel %d subband %d factory cal ch %d & %d\n",
2039                           channel, s, ch_i1, ch_i2);
2040
2041         for (c = 0; c < EEPROM_TX_POWER_TX_CHAINS; c++) {
2042                 for (m = 0; m < EEPROM_TX_POWER_MEASUREMENTS; m++) {
2043                         m1 = &(priv->eeprom.calib_info.band_info[s].ch1.
2044                                measurements[c][m]);
2045                         m2 = &(priv->eeprom.calib_info.band_info[s].ch2.
2046                                measurements[c][m]);
2047                         omeas = &(chan_info->measurements[c][m]);
2048
2049                         omeas->actual_pow =
2050                             (u8) iwl4965_interpolate_value(channel, ch_i1,
2051                                                            m1->actual_pow,
2052                                                            ch_i2,
2053                                                            m2->actual_pow);
2054                         omeas->gain_idx =
2055                             (u8) iwl4965_interpolate_value(channel, ch_i1,
2056                                                            m1->gain_idx, ch_i2,
2057                                                            m2->gain_idx);
2058                         omeas->temperature =
2059                             (u8) iwl4965_interpolate_value(channel, ch_i1,
2060                                                            m1->temperature,
2061                                                            ch_i2,
2062                                                            m2->temperature);
2063                         omeas->pa_det =
2064                             (s8) iwl4965_interpolate_value(channel, ch_i1,
2065                                                            m1->pa_det, ch_i2,
2066                                                            m2->pa_det);
2067
2068                         IWL_DEBUG_TXPOWER
2069                             ("chain %d meas %d AP1=%d AP2=%d AP=%d\n", c, m,
2070                              m1->actual_pow, m2->actual_pow, omeas->actual_pow);
2071                         IWL_DEBUG_TXPOWER
2072                             ("chain %d meas %d NI1=%d NI2=%d NI=%d\n", c, m,
2073                              m1->gain_idx, m2->gain_idx, omeas->gain_idx);
2074                         IWL_DEBUG_TXPOWER
2075                             ("chain %d meas %d PA1=%d PA2=%d PA=%d\n", c, m,
2076                              m1->pa_det, m2->pa_det, omeas->pa_det);
2077                         IWL_DEBUG_TXPOWER
2078                             ("chain %d meas %d  T1=%d  T2=%d  T=%d\n", c, m,
2079                              m1->temperature, m2->temperature,
2080                              omeas->temperature);
2081                 }
2082         }
2083
2084         return 0;
2085 }
2086
2087 /* bit-rate-dependent table to prevent Tx distortion, in half-dB units,
2088  * for OFDM 6, 12, 18, 24, 36, 48, 54, 60 MBit, and CCK all rates. */
2089 static s32 back_off_table[] = {
2090         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 20 MHz */
2091         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 20 MHz */
2092         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 40 MHz */
2093         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 40 MHz */
2094         10                      /* CCK */
2095 };
2096
2097 /* Thermal compensation values for txpower for various frequency ranges ...
2098  *   ratios from 3:1 to 4.5:1 of degrees (Celsius) per half-dB gain adjust */
2099 static struct iwl4965_txpower_comp_entry {
2100         s32 degrees_per_05db_a;
2101         s32 degrees_per_05db_a_denom;
2102 } tx_power_cmp_tble[CALIB_CH_GROUP_MAX] = {
2103         {9, 2},                 /* group 0 5.2, ch  34-43 */
2104         {4, 1},                 /* group 1 5.2, ch  44-70 */
2105         {4, 1},                 /* group 2 5.2, ch  71-124 */
2106         {4, 1},                 /* group 3 5.2, ch 125-200 */
2107         {3, 1}                  /* group 4 2.4, ch   all */
2108 };
2109
2110 static s32 get_min_power_index(s32 rate_power_index, u32 band)
2111 {
2112         if (!band) {
2113                 if ((rate_power_index & 7) <= 4)
2114                         return MIN_TX_GAIN_INDEX_52GHZ_EXT;
2115         }
2116         return MIN_TX_GAIN_INDEX;
2117 }
2118
2119 struct gain_entry {
2120         u8 dsp;
2121         u8 radio;
2122 };
2123
2124 static const struct gain_entry gain_table[2][108] = {
2125         /* 5.2GHz power gain index table */
2126         {
2127          {123, 0x3F},           /* highest txpower */
2128          {117, 0x3F},
2129          {110, 0x3F},
2130          {104, 0x3F},
2131          {98, 0x3F},
2132          {110, 0x3E},
2133          {104, 0x3E},
2134          {98, 0x3E},
2135          {110, 0x3D},
2136          {104, 0x3D},
2137          {98, 0x3D},
2138          {110, 0x3C},
2139          {104, 0x3C},
2140          {98, 0x3C},
2141          {110, 0x3B},
2142          {104, 0x3B},
2143          {98, 0x3B},
2144          {110, 0x3A},
2145          {104, 0x3A},
2146          {98, 0x3A},
2147          {110, 0x39},
2148          {104, 0x39},
2149          {98, 0x39},
2150          {110, 0x38},
2151          {104, 0x38},
2152          {98, 0x38},
2153          {110, 0x37},
2154          {104, 0x37},
2155          {98, 0x37},
2156          {110, 0x36},
2157          {104, 0x36},
2158          {98, 0x36},
2159          {110, 0x35},
2160          {104, 0x35},
2161          {98, 0x35},
2162          {110, 0x34},
2163          {104, 0x34},
2164          {98, 0x34},
2165          {110, 0x33},
2166          {104, 0x33},
2167          {98, 0x33},
2168          {110, 0x32},
2169          {104, 0x32},
2170          {98, 0x32},
2171          {110, 0x31},
2172          {104, 0x31},
2173          {98, 0x31},
2174          {110, 0x30},
2175          {104, 0x30},
2176          {98, 0x30},
2177          {110, 0x25},
2178          {104, 0x25},
2179          {98, 0x25},
2180          {110, 0x24},
2181          {104, 0x24},
2182          {98, 0x24},
2183          {110, 0x23},
2184          {104, 0x23},
2185          {98, 0x23},
2186          {110, 0x22},
2187          {104, 0x18},
2188          {98, 0x18},
2189          {110, 0x17},
2190          {104, 0x17},
2191          {98, 0x17},
2192          {110, 0x16},
2193          {104, 0x16},
2194          {98, 0x16},
2195          {110, 0x15},
2196          {104, 0x15},
2197          {98, 0x15},
2198          {110, 0x14},
2199          {104, 0x14},
2200          {98, 0x14},
2201          {110, 0x13},
2202          {104, 0x13},
2203          {98, 0x13},
2204          {110, 0x12},
2205          {104, 0x08},
2206          {98, 0x08},
2207          {110, 0x07},
2208          {104, 0x07},
2209          {98, 0x07},
2210          {110, 0x06},
2211          {104, 0x06},
2212          {98, 0x06},
2213          {110, 0x05},
2214          {104, 0x05},
2215          {98, 0x05},
2216          {110, 0x04},
2217          {104, 0x04},
2218          {98, 0x04},
2219          {110, 0x03},
2220          {104, 0x03},
2221          {98, 0x03},
2222          {110, 0x02},
2223          {104, 0x02},
2224          {98, 0x02},
2225          {110, 0x01},
2226          {104, 0x01},
2227          {98, 0x01},
2228          {110, 0x00},
2229          {104, 0x00},
2230          {98, 0x00},
2231          {93, 0x00},
2232          {88, 0x00},
2233          {83, 0x00},
2234          {78, 0x00},
2235          },
2236         /* 2.4GHz power gain index table */
2237         {
2238          {110, 0x3f},           /* highest txpower */
2239          {104, 0x3f},
2240          {98, 0x3f},
2241          {110, 0x3e},
2242          {104, 0x3e},
2243          {98, 0x3e},
2244          {110, 0x3d},
2245          {104, 0x3d},
2246          {98, 0x3d},
2247          {110, 0x3c},
2248          {104, 0x3c},
2249          {98, 0x3c},
2250          {110, 0x3b},
2251          {104, 0x3b},
2252          {98, 0x3b},
2253          {110, 0x3a},
2254          {104, 0x3a},
2255          {98, 0x3a},
2256          {110, 0x39},
2257          {104, 0x39},
2258          {98, 0x39},
2259          {110, 0x38},
2260          {104, 0x38},
2261          {98, 0x38},
2262          {110, 0x37},
2263          {104, 0x37},
2264          {98, 0x37},
2265          {110, 0x36},
2266          {104, 0x36},
2267          {98, 0x36},
2268          {110, 0x35},
2269          {104, 0x35},
2270          {98, 0x35},
2271          {110, 0x34},
2272          {104, 0x34},
2273          {98, 0x34},
2274          {110, 0x33},
2275          {104, 0x33},
2276          {98, 0x33},
2277          {110, 0x32},
2278          {104, 0x32},
2279          {98, 0x32},
2280          {110, 0x31},
2281          {104, 0x31},
2282          {98, 0x31},
2283          {110, 0x30},
2284          {104, 0x30},
2285          {98, 0x30},
2286          {110, 0x6},
2287          {104, 0x6},
2288          {98, 0x6},
2289          {110, 0x5},
2290          {104, 0x5},
2291          {98, 0x5},
2292          {110, 0x4},
2293          {104, 0x4},
2294          {98, 0x4},
2295          {110, 0x3},
2296          {104, 0x3},
2297          {98, 0x3},
2298          {110, 0x2},
2299          {104, 0x2},
2300          {98, 0x2},
2301          {110, 0x1},
2302          {104, 0x1},
2303          {98, 0x1},
2304          {110, 0x0},
2305          {104, 0x0},
2306          {98, 0x0},
2307          {97, 0},
2308          {96, 0},
2309          {95, 0},
2310          {94, 0},
2311          {93, 0},
2312          {92, 0},
2313          {91, 0},
2314          {90, 0},
2315          {89, 0},
2316          {88, 0},
2317          {87, 0},
2318          {86, 0},
2319          {85, 0},
2320          {84, 0},
2321          {83, 0},
2322          {82, 0},
2323          {81, 0},
2324          {80, 0},
2325          {79, 0},
2326          {78, 0},
2327          {77, 0},
2328          {76, 0},
2329          {75, 0},
2330          {74, 0},
2331          {73, 0},
2332          {72, 0},
2333          {71, 0},
2334          {70, 0},
2335          {69, 0},
2336          {68, 0},
2337          {67, 0},
2338          {66, 0},
2339          {65, 0},
2340          {64, 0},
2341          {63, 0},
2342          {62, 0},
2343          {61, 0},
2344          {60, 0},
2345          {59, 0},
2346          }
2347 };
2348
2349 static int iwl4965_fill_txpower_tbl(struct iwl4965_priv *priv, u8 band, u16 channel,
2350                                     u8 is_fat, u8 ctrl_chan_high,
2351                                     struct iwl4965_tx_power_db *tx_power_tbl)
2352 {
2353         u8 saturation_power;
2354         s32 target_power;
2355         s32 user_target_power;
2356         s32 power_limit;
2357         s32 current_temp;
2358         s32 reg_limit;
2359         s32 current_regulatory;
2360         s32 txatten_grp = CALIB_CH_GROUP_MAX;
2361         int i;
2362         int c;
2363         const struct iwl4965_channel_info *ch_info = NULL;
2364         struct iwl4965_eeprom_calib_ch_info ch_eeprom_info;
2365         const struct iwl4965_eeprom_calib_measure *measurement;
2366         s16 voltage;
2367         s32 init_voltage;
2368         s32 voltage_compensation;
2369         s32 degrees_per_05db_num;
2370         s32 degrees_per_05db_denom;
2371         s32 factory_temp;
2372         s32 temperature_comp[2];
2373         s32 factory_gain_index[2];
2374         s32 factory_actual_pwr[2];
2375         s32 power_index;
2376
2377         /* Sanity check requested level (dBm) */
2378         if (priv->user_txpower_limit < IWL_TX_POWER_TARGET_POWER_MIN) {
2379                 IWL_WARNING("Requested user TXPOWER %d below limit.\n",
2380                             priv->user_txpower_limit);
2381                 return -EINVAL;
2382         }
2383         if (priv->user_txpower_limit > IWL_TX_POWER_TARGET_POWER_MAX) {
2384                 IWL_WARNING("Requested user TXPOWER %d above limit.\n",
2385                             priv->user_txpower_limit);
2386                 return -EINVAL;
2387         }
2388
2389         /* user_txpower_limit is in dBm, convert to half-dBm (half-dB units
2390          *   are used for indexing into txpower table) */
2391         user_target_power = 2 * priv->user_txpower_limit;
2392
2393         /* Get current (RXON) channel, band, width */
2394         ch_info =
2395                 iwl4965_get_channel_txpower_info(priv, priv->phymode, channel);
2396
2397         IWL_DEBUG_TXPOWER("chan %d band %d is_fat %d\n", channel, band,
2398                           is_fat);
2399
2400         if (!ch_info)
2401                 return -EINVAL;
2402
2403         /* get txatten group, used to select 1) thermal txpower adjustment
2404          *   and 2) mimo txpower balance between Tx chains. */
2405         txatten_grp = iwl4965_get_tx_atten_grp(channel);
2406         if (txatten_grp < 0)
2407                 return -EINVAL;
2408
2409         IWL_DEBUG_TXPOWER("channel %d belongs to txatten group %d\n",
2410                           channel, txatten_grp);
2411
2412         if (is_fat) {
2413                 if (ctrl_chan_high)
2414                         channel -= 2;
2415                 else
2416                         channel += 2;
2417         }
2418
2419         /* hardware txpower limits ...
2420          * saturation (clipping distortion) txpowers are in half-dBm */
2421         if (band)
2422                 saturation_power = priv->eeprom.calib_info.saturation_power24;
2423         else
2424                 saturation_power = priv->eeprom.calib_info.saturation_power52;
2425
2426         if (saturation_power < IWL_TX_POWER_SATURATION_MIN ||
2427             saturation_power > IWL_TX_POWER_SATURATION_MAX) {
2428                 if (band)
2429                         saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_24;
2430                 else
2431                         saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_52;
2432         }
2433
2434         /* regulatory txpower limits ... reg_limit values are in half-dBm,
2435          *   max_power_avg values are in dBm, convert * 2 */
2436         if (is_fat)
2437                 reg_limit = ch_info->fat_max_power_avg * 2;
2438         else
2439                 reg_limit = ch_info->max_power_avg * 2;
2440
2441         if ((reg_limit < IWL_TX_POWER_REGULATORY_MIN) ||
2442             (reg_limit > IWL_TX_POWER_REGULATORY_MAX)) {
2443                 if (band)
2444                         reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_24;
2445                 else
2446                         reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_52;
2447         }
2448
2449         /* Interpolate txpower calibration values for this channel,
2450          *   based on factory calibration tests on spaced channels. */
2451         iwl4965_interpolate_chan(priv, channel, &ch_eeprom_info);
2452
2453         /* calculate tx gain adjustment based on power supply voltage */
2454         voltage = priv->eeprom.calib_info.voltage;
2455         init_voltage = (s32)le32_to_cpu(priv->card_alive_init.voltage);
2456         voltage_compensation =
2457             iwl4965_get_voltage_compensation(voltage, init_voltage);
2458
2459         IWL_DEBUG_TXPOWER("curr volt %d eeprom volt %d volt comp %d\n",
2460                           init_voltage,
2461                           voltage, voltage_compensation);
2462
2463         /* get current temperature (Celsius) */
2464         current_temp = max(priv->temperature, IWL_TX_POWER_TEMPERATURE_MIN);
2465         current_temp = min(priv->temperature, IWL_TX_POWER_TEMPERATURE_MAX);
2466         current_temp = KELVIN_TO_CELSIUS(current_temp);
2467
2468         /* select thermal txpower adjustment params, based on channel group
2469          *   (same frequency group used for mimo txatten adjustment) */
2470         degrees_per_05db_num =
2471             tx_power_cmp_tble[txatten_grp].degrees_per_05db_a;
2472         degrees_per_05db_denom =
2473             tx_power_cmp_tble[txatten_grp].degrees_per_05db_a_denom;
2474
2475         /* get per-chain txpower values from factory measurements */
2476         for (c = 0; c < 2; c++) {
2477                 measurement = &ch_eeprom_info.measurements[c][1];
2478
2479                 /* txgain adjustment (in half-dB steps) based on difference
2480                  *   between factory and current temperature */
2481                 factory_temp = measurement->temperature;
2482                 iwl4965_math_div_round((current_temp - factory_temp) *
2483                                        degrees_per_05db_denom,
2484                                        degrees_per_05db_num,
2485                                        &temperature_comp[c]);
2486
2487                 factory_gain_index[c] = measurement->gain_idx;
2488                 factory_actual_pwr[c] = measurement->actual_pow;
2489
2490                 IWL_DEBUG_TXPOWER("chain = %d\n", c);
2491                 IWL_DEBUG_TXPOWER("fctry tmp %d, "
2492                                   "curr tmp %d, comp %d steps\n",
2493                                   factory_temp, current_temp,
2494                                   temperature_comp[c]);
2495
2496                 IWL_DEBUG_TXPOWER("fctry idx %d, fctry pwr %d\n",
2497                                   factory_gain_index[c],
2498                                   factory_actual_pwr[c]);
2499         }
2500
2501         /* for each of 33 bit-rates (including 1 for CCK) */
2502         for (i = 0; i < POWER_TABLE_NUM_ENTRIES; i++) {
2503                 u8 is_mimo_rate;
2504                 union iwl4965_tx_power_dual_stream tx_power;
2505
2506                 /* for mimo, reduce each chain's txpower by half
2507                  * (3dB, 6 steps), so total output power is regulatory
2508                  * compliant. */
2509                 if (i & 0x8) {
2510                         current_regulatory = reg_limit -
2511                             IWL_TX_POWER_MIMO_REGULATORY_COMPENSATION;
2512                         is_mimo_rate = 1;
2513                 } else {
2514                         current_regulatory = reg_limit;
2515                         is_mimo_rate = 0;
2516                 }
2517
2518                 /* find txpower limit, either hardware or regulatory */
2519                 power_limit = saturation_power - back_off_table[i];
2520                 if (power_limit > current_regulatory)
2521                         power_limit = current_regulatory;
2522
2523                 /* reduce user's txpower request if necessary
2524                  * for this rate on this channel */
2525                 target_power = user_target_power;
2526                 if (target_power > power_limit)
2527                         target_power = power_limit;
2528
2529                 IWL_DEBUG_TXPOWER("rate %d sat %d reg %d usr %d tgt %d\n",
2530                                   i, saturation_power - back_off_table[i],
2531                                   current_regulatory, user_target_power,
2532                                   target_power);
2533
2534                 /* for each of 2 Tx chains (radio transmitters) */
2535                 for (c = 0; c < 2; c++) {
2536                         s32 atten_value;
2537
2538                         if (is_mimo_rate)
2539                                 atten_value =
2540                                     (s32)le32_to_cpu(priv->card_alive_init.
2541                                     tx_atten[txatten_grp][c]);
2542                         else
2543                                 atten_value = 0;
2544
2545                         /* calculate index; higher index means lower txpower */
2546                         power_index = (u8) (factory_gain_index[c] -
2547                                             (target_power -
2548                                              factory_actual_pwr[c]) -
2549                                             temperature_comp[c] -
2550                                             voltage_compensation +
2551                                             atten_value);
2552
2553 /*                      IWL_DEBUG_TXPOWER("calculated txpower index %d\n",
2554                                                 power_index); */
2555
2556                         if (power_index < get_min_power_index(i, band))
2557                                 power_index = get_min_power_index(i, band);
2558
2559                         /* adjust 5 GHz index to support negative indexes */
2560                         if (!band)
2561                                 power_index += 9;
2562
2563                         /* CCK, rate 32, reduce txpower for CCK */
2564                         if (i == POWER_TABLE_CCK_ENTRY)
2565                                 power_index +=
2566                                     IWL_TX_POWER_CCK_COMPENSATION_C_STEP;
2567
2568                         /* stay within the table! */
2569                         if (power_index > 107) {
2570                                 IWL_WARNING("txpower index %d > 107\n",
2571                                             power_index);
2572                                 power_index = 107;
2573                         }
2574                         if (power_index < 0) {
2575                                 IWL_WARNING("txpower index %d < 0\n",
2576                                             power_index);
2577                                 power_index = 0;
2578                         }
2579
2580                         /* fill txpower command for this rate/chain */
2581                         tx_power.s.radio_tx_gain[c] =
2582                                 gain_table[band][power_index].radio;
2583                         tx_power.s.dsp_predis_atten[c] =
2584                                 gain_table[band][power_index].dsp;
2585
2586                         IWL_DEBUG_TXPOWER("chain %d mimo %d index %d "
2587                                           "gain 0x%02x dsp %d\n",
2588                                           c, atten_value, power_index,
2589                                         tx_power.s.radio_tx_gain[c],
2590                                         tx_power.s.dsp_predis_atten[c]);
2591                 }/* for each chain */
2592
2593                 tx_power_tbl->power_tbl[i].dw = cpu_to_le32(tx_power.dw);
2594
2595         }/* for each rate */
2596
2597         return 0;
2598 }
2599
2600 /**
2601  * iwl4965_hw_reg_send_txpower - Configure the TXPOWER level user limit
2602  *
2603  * Uses the active RXON for channel, band, and characteristics (fat, high)
2604  * The power limit is taken from priv->user_txpower_limit.
2605  */
2606 int iwl4965_hw_reg_send_txpower(struct iwl4965_priv *priv)
2607 {
2608         struct iwl4965_txpowertable_cmd cmd = { 0 };
2609         int rc = 0;
2610         u8 band = 0;
2611         u8 is_fat = 0;
2612         u8 ctrl_chan_high = 0;
2613
2614         if (test_bit(STATUS_SCANNING, &priv->status)) {
2615                 /* If this gets hit a lot, switch it to a BUG() and catch
2616                  * the stack trace to find out who is calling this during
2617                  * a scan. */
2618                 IWL_WARNING("TX Power requested while scanning!\n");
2619                 return -EAGAIN;
2620         }
2621
2622         band = ((priv->phymode == MODE_IEEE80211B) ||
2623                 (priv->phymode == MODE_IEEE80211G));
2624
2625         is_fat =  is_fat_channel(priv->active_rxon.flags);
2626
2627         if (is_fat &&
2628             (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
2629                 ctrl_chan_high = 1;
2630
2631         cmd.band = band;
2632         cmd.channel = priv->active_rxon.channel;
2633
2634         rc = iwl4965_fill_txpower_tbl(priv, band,
2635                                 le16_to_cpu(priv->active_rxon.channel),
2636                                 is_fat, ctrl_chan_high, &cmd.tx_power);
2637         if (rc)
2638                 return rc;
2639
2640         rc = iwl4965_send_cmd_pdu(priv, REPLY_TX_PWR_TABLE_CMD, sizeof(cmd), &cmd);
2641         return rc;
2642 }
2643
2644 int iwl4965_hw_channel_switch(struct iwl4965_priv *priv, u16 channel)
2645 {
2646         int rc;
2647         u8 band = 0;
2648         u8 is_fat = 0;
2649         u8 ctrl_chan_high = 0;
2650         struct iwl4965_channel_switch_cmd cmd = { 0 };
2651         const struct iwl4965_channel_info *ch_info;
2652
2653         band = ((priv->phymode == MODE_IEEE80211B) ||
2654                 (priv->phymode == MODE_IEEE80211G));
2655
2656         ch_info = iwl4965_get_channel_info(priv, priv->phymode, channel);
2657
2658         is_fat = is_fat_channel(priv->staging_rxon.flags);
2659
2660         if (is_fat &&
2661             (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
2662                 ctrl_chan_high = 1;
2663
2664         cmd.band = band;
2665         cmd.expect_beacon = 0;
2666         cmd.channel = cpu_to_le16(channel);
2667         cmd.rxon_flags = priv->active_rxon.flags;
2668         cmd.rxon_filter_flags = priv->active_rxon.filter_flags;
2669         cmd.switch_time = cpu_to_le32(priv->ucode_beacon_time);
2670         if (ch_info)
2671                 cmd.expect_beacon = is_channel_radar(ch_info);
2672         else
2673                 cmd.expect_beacon = 1;
2674
2675         rc = iwl4965_fill_txpower_tbl(priv, band, channel, is_fat,
2676                                       ctrl_chan_high, &cmd.tx_power);
2677         if (rc) {
2678                 IWL_DEBUG_11H("error:%d  fill txpower_tbl\n", rc);
2679                 return rc;
2680         }
2681
2682         rc = iwl4965_send_cmd_pdu(priv, REPLY_CHANNEL_SWITCH, sizeof(cmd), &cmd);
2683         return rc;
2684 }
2685
2686 #define RTS_HCCA_RETRY_LIMIT            3
2687 #define RTS_DFAULT_RETRY_LIMIT          60
2688
2689 void iwl4965_hw_build_tx_cmd_rate(struct iwl4965_priv *priv,
2690                               struct iwl4965_cmd *cmd,
2691                               struct ieee80211_tx_control *ctrl,
2692                               struct ieee80211_hdr *hdr, int sta_id,
2693                               int is_hcca)
2694 {
2695         struct iwl4965_tx_cmd *tx = &cmd->cmd.tx;
2696         u8 rts_retry_limit = 0;
2697         u8 data_retry_limit = 0;
2698         u16 fc = le16_to_cpu(hdr->frame_control);
2699         u8 rate_plcp;
2700         u16 rate_flags = 0;
2701         int rate_idx = min(ctrl->tx_rate & 0xffff, IWL_RATE_COUNT - 1);
2702
2703         rate_plcp = iwl4965_rates[rate_idx].plcp;
2704
2705         rts_retry_limit = (is_hcca) ?
2706             RTS_HCCA_RETRY_LIMIT : RTS_DFAULT_RETRY_LIMIT;
2707
2708         if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
2709                 rate_flags |= RATE_MCS_CCK_MSK;
2710
2711
2712         if (ieee80211_is_probe_response(fc)) {
2713                 data_retry_limit = 3;
2714                 if (data_retry_limit < rts_retry_limit)
2715                         rts_retry_limit = data_retry_limit;
2716         } else
2717                 data_retry_limit = IWL_DEFAULT_TX_RETRY;
2718
2719         if (priv->data_retry_limit != -1)
2720                 data_retry_limit = priv->data_retry_limit;
2721
2722
2723         if (ieee80211_is_data(fc)) {
2724                 tx->initial_rate_index = 0;
2725                 tx->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
2726         } else {
2727                 switch (fc & IEEE80211_FCTL_STYPE) {
2728                 case IEEE80211_STYPE_AUTH:
2729                 case IEEE80211_STYPE_DEAUTH:
2730                 case IEEE80211_STYPE_ASSOC_REQ:
2731                 case IEEE80211_STYPE_REASSOC_REQ:
2732                         if (tx->tx_flags & TX_CMD_FLG_RTS_MSK) {
2733                                 tx->tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2734                                 tx->tx_flags |= TX_CMD_FLG_CTS_MSK;
2735                         }
2736                         break;
2737                 default:
2738                         break;
2739                 }
2740
2741                 /* Alternate between antenna A and B for successive frames */
2742                 if (priv->use_ant_b_for_management_frame) {
2743                         priv->use_ant_b_for_management_frame = 0;
2744                         rate_flags |= RATE_MCS_ANT_B_MSK;
2745                 } else {
2746                         priv->use_ant_b_for_management_frame = 1;
2747                         rate_flags |= RATE_MCS_ANT_A_MSK;
2748                 }
2749         }
2750
2751         tx->rts_retry_limit = rts_retry_limit;
2752         tx->data_retry_limit = data_retry_limit;
2753         tx->rate_n_flags = iwl4965_hw_set_rate_n_flags(rate_plcp, rate_flags);
2754 }
2755
2756 int iwl4965_hw_get_rx_read(struct iwl4965_priv *priv)
2757 {
2758         struct iwl4965_shared *shared_data = priv->hw_setting.shared_virt;
2759
2760         return IWL_GET_BITS(*shared_data, rb_closed_stts_rb_num);
2761 }
2762
2763 int iwl4965_hw_get_temperature(struct iwl4965_priv *priv)
2764 {
2765         return priv->temperature;
2766 }
2767
2768 unsigned int iwl4965_hw_get_beacon_cmd(struct iwl4965_priv *priv,
2769                           struct iwl4965_frame *frame, u8 rate)
2770 {
2771         struct iwl4965_tx_beacon_cmd *tx_beacon_cmd;
2772         unsigned int frame_size;
2773
2774         tx_beacon_cmd = &frame->u.beacon;
2775         memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
2776
2777         tx_beacon_cmd->tx.sta_id = IWL4965_BROADCAST_ID;
2778         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2779
2780         frame_size = iwl4965_fill_beacon_frame(priv,
2781                                 tx_beacon_cmd->frame,
2782                                 iwl4965_broadcast_addr,
2783                                 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
2784
2785         BUG_ON(frame_size > MAX_MPDU_SIZE);
2786         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
2787
2788         if ((rate == IWL_RATE_1M_PLCP) || (rate >= IWL_RATE_2M_PLCP))
2789                 tx_beacon_cmd->tx.rate_n_flags =
2790                         iwl4965_hw_set_rate_n_flags(rate, RATE_MCS_CCK_MSK);
2791         else
2792                 tx_beacon_cmd->tx.rate_n_flags =
2793                         iwl4965_hw_set_rate_n_flags(rate, 0);
2794
2795         tx_beacon_cmd->tx.tx_flags = (TX_CMD_FLG_SEQ_CTL_MSK |
2796                                 TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK);
2797         return (sizeof(*tx_beacon_cmd) + frame_size);
2798 }
2799
2800 /*
2801  * Tell 4965 where to find circular buffer of Tx Frame Descriptors for
2802  * given Tx queue, and enable the DMA channel used for that queue.
2803  *
2804  * 4965 supports up to 16 Tx queues in DRAM, mapped to up to 8 Tx DMA
2805  * channels supported in hardware.
2806  */
2807 int iwl4965_hw_tx_queue_init(struct iwl4965_priv *priv, struct iwl4965_tx_queue *txq)
2808 {
2809         int rc;
2810         unsigned long flags;
2811         int txq_id = txq->q.id;
2812
2813         spin_lock_irqsave(&priv->lock, flags);
2814         rc = iwl4965_grab_nic_access(priv);
2815         if (rc) {
2816                 spin_unlock_irqrestore(&priv->lock, flags);
2817                 return rc;
2818         }
2819
2820         /* Circular buffer (TFD queue in DRAM) physical base address */
2821         iwl4965_write_direct32(priv, FH_MEM_CBBC_QUEUE(txq_id),
2822                              txq->q.dma_addr >> 8);
2823
2824         /* Enable DMA channel, using same id as for TFD queue */
2825         iwl4965_write_direct32(
2826                 priv, IWL_FH_TCSR_CHNL_TX_CONFIG_REG(txq_id),
2827                 IWL_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE |
2828                 IWL_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE_VAL);
2829         iwl4965_release_nic_access(priv);
2830         spin_unlock_irqrestore(&priv->lock, flags);
2831
2832         return 0;
2833 }
2834
2835 int iwl4965_hw_txq_attach_buf_to_tfd(struct iwl4965_priv *priv, void *ptr,
2836                                  dma_addr_t addr, u16 len)
2837 {
2838         int index, is_odd;
2839         struct iwl4965_tfd_frame *tfd = ptr;
2840         u32 num_tbs = IWL_GET_BITS(*tfd, num_tbs);
2841
2842         /* Each TFD can point to a maximum 20 Tx buffers */
2843         if ((num_tbs >= MAX_NUM_OF_TBS) || (num_tbs < 0)) {
2844                 IWL_ERROR("Error can not send more than %d chunks\n",
2845                           MAX_NUM_OF_TBS);
2846                 return -EINVAL;
2847         }
2848
2849         index = num_tbs / 2;
2850         is_odd = num_tbs & 0x1;
2851
2852         if (!is_odd) {
2853                 tfd->pa[index].tb1_addr = cpu_to_le32(addr);
2854                 IWL_SET_BITS(tfd->pa[index], tb1_addr_hi,
2855                              iwl_get_dma_hi_address(addr));
2856                 IWL_SET_BITS(tfd->pa[index], tb1_len, len);
2857         } else {
2858                 IWL_SET_BITS(tfd->pa[index], tb2_addr_lo16,
2859                              (u32) (addr & 0xffff));
2860                 IWL_SET_BITS(tfd->pa[index], tb2_addr_hi20, addr >> 16);
2861                 IWL_SET_BITS(tfd->pa[index], tb2_len, len);
2862         }
2863
2864         IWL_SET_BITS(*tfd, num_tbs, num_tbs + 1);
2865
2866         return 0;
2867 }
2868
2869 static void iwl4965_hw_card_show_info(struct iwl4965_priv *priv)
2870 {
2871         u16 hw_version = priv->eeprom.board_revision_4965;
2872
2873         IWL_DEBUG_INFO("4965ABGN HW Version %u.%u.%u\n",
2874                        ((hw_version >> 8) & 0x0F),
2875                        ((hw_version >> 8) >> 4), (hw_version & 0x00FF));
2876
2877         IWL_DEBUG_INFO("4965ABGN PBA Number %.16s\n",
2878                        priv->eeprom.board_pba_number_4965);
2879 }
2880
2881 #define IWL_TX_CRC_SIZE         4
2882 #define IWL_TX_DELIMITER_SIZE   4
2883
2884 /**
2885  * iwl4965_tx_queue_update_wr_ptr - Set up entry in Tx byte-count array
2886  */
2887 int iwl4965_tx_queue_update_wr_ptr(struct iwl4965_priv *priv,
2888                                    struct iwl4965_tx_queue *txq, u16 byte_cnt)
2889 {
2890         int len;
2891         int txq_id = txq->q.id;
2892         struct iwl4965_shared *shared_data = priv->hw_setting.shared_virt;
2893
2894         if (txq->need_update == 0)
2895                 return 0;
2896
2897         len = byte_cnt + IWL_TX_CRC_SIZE + IWL_TX_DELIMITER_SIZE;
2898
2899         /* Set up byte count within first 256 entries */
2900         IWL_SET_BITS16(shared_data->queues_byte_cnt_tbls[txq_id].
2901                        tfd_offset[txq->q.write_ptr], byte_cnt, len);
2902
2903         /* If within first 64 entries, duplicate at end */
2904         if (txq->q.write_ptr < IWL4965_MAX_WIN_SIZE)
2905                 IWL_SET_BITS16(shared_data->queues_byte_cnt_tbls[txq_id].
2906                         tfd_offset[IWL4965_QUEUE_SIZE + txq->q.write_ptr],
2907                         byte_cnt, len);
2908
2909         return 0;
2910 }
2911
2912 /**
2913  * iwl4965_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
2914  *
2915  * Selects how many and which Rx receivers/antennas/chains to use.
2916  * This should not be used for scan command ... it puts data in wrong place.
2917  */
2918 void iwl4965_set_rxon_chain(struct iwl4965_priv *priv)
2919 {
2920         u8 is_single = is_single_stream(priv);
2921         u8 idle_state, rx_state;
2922
2923         priv->staging_rxon.rx_chain = 0;
2924         rx_state = idle_state = 3;
2925
2926         /* Tell uCode which antennas are actually connected.
2927          * Before first association, we assume all antennas are connected.
2928          * Just after first association, iwl4965_noise_calibration()
2929          *    checks which antennas actually *are* connected. */
2930         priv->staging_rxon.rx_chain |=
2931             cpu_to_le16(priv->valid_antenna << RXON_RX_CHAIN_VALID_POS);
2932
2933         /* How many receivers should we use? */
2934         iwl4965_get_rx_chain_counter(priv, &idle_state, &rx_state);
2935         priv->staging_rxon.rx_chain |=
2936                 cpu_to_le16(rx_state << RXON_RX_CHAIN_MIMO_CNT_POS);
2937         priv->staging_rxon.rx_chain |=
2938                 cpu_to_le16(idle_state << RXON_RX_CHAIN_CNT_POS);
2939
2940         if (!is_single && (rx_state >= 2) &&
2941             !test_bit(STATUS_POWER_PMI, &priv->status))
2942                 priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
2943         else
2944                 priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
2945
2946         IWL_DEBUG_ASSOC("rx chain %X\n", priv->staging_rxon.rx_chain);
2947 }
2948
2949 #ifdef CONFIG_IWL4965_HT
2950 #ifdef CONFIG_IWL4965_HT_AGG
2951 /*
2952         get the traffic load value for tid
2953 */
2954 static u32 iwl4965_tl_get_load(struct iwl4965_priv *priv, u8 tid)
2955 {
2956         u32 load = 0;
2957         u32 current_time = jiffies_to_msecs(jiffies);
2958         u32 time_diff;
2959         s32 index;
2960         unsigned long flags;
2961         struct iwl4965_traffic_load *tid_ptr = NULL;
2962
2963         if (tid >= TID_MAX_LOAD_COUNT)
2964                 return 0;
2965
2966         tid_ptr = &(priv->lq_mngr.agg_ctrl.traffic_load[tid]);
2967
2968         current_time -= current_time % TID_ROUND_VALUE;
2969
2970         spin_lock_irqsave(&priv->lq_mngr.lock, flags);
2971         if (!(tid_ptr->queue_count))
2972                 goto out;
2973
2974         time_diff = TIME_WRAP_AROUND(tid_ptr->time_stamp, current_time);
2975         index = time_diff / TID_QUEUE_CELL_SPACING;
2976
2977         if (index >= TID_QUEUE_MAX_SIZE) {
2978                 u32 oldest_time = current_time - TID_MAX_TIME_DIFF;
2979
2980                 while (tid_ptr->queue_count &&
2981                        (tid_ptr->time_stamp < oldest_time)) {
2982                         tid_ptr->total -= tid_ptr->packet_count[tid_ptr->head];
2983                         tid_ptr->packet_count[tid_ptr->head] = 0;
2984                         tid_ptr->time_stamp += TID_QUEUE_CELL_SPACING;
2985                         tid_ptr->queue_count--;
2986                         tid_ptr->head++;
2987                         if (tid_ptr->head >= TID_QUEUE_MAX_SIZE)
2988                                 tid_ptr->head = 0;
2989                 }
2990         }
2991         load = tid_ptr->total;
2992
2993  out:
2994         spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
2995         return load;
2996 }
2997
2998 /*
2999         increment traffic load value for tid and also remove
3000         any old values if passed the certian time period
3001 */
3002 static void iwl4965_tl_add_packet(struct iwl4965_priv *priv, u8 tid)
3003 {
3004         u32 current_time = jiffies_to_msecs(jiffies);
3005         u32 time_diff;
3006         s32 index;
3007         unsigned long flags;
3008         struct iwl4965_traffic_load *tid_ptr = NULL;
3009
3010         if (tid >= TID_MAX_LOAD_COUNT)
3011                 return;
3012
3013         tid_ptr = &(priv->lq_mngr.agg_ctrl.traffic_load[tid]);
3014
3015         current_time -= current_time % TID_ROUND_VALUE;
3016
3017         spin_lock_irqsave(&priv->lq_mngr.lock, flags);
3018         if (!(tid_ptr->queue_count)) {
3019                 tid_ptr->total = 1;
3020                 tid_ptr->time_stamp = current_time;
3021                 tid_ptr->queue_count = 1;
3022                 tid_ptr->head = 0;
3023                 tid_ptr->packet_count[0] = 1;
3024                 goto out;
3025         }
3026
3027         time_diff = TIME_WRAP_AROUND(tid_ptr->time_stamp, current_time);
3028         index = time_diff / TID_QUEUE_CELL_SPACING;
3029
3030         if (index >= TID_QUEUE_MAX_SIZE) {
3031                 u32 oldest_time = current_time - TID_MAX_TIME_DIFF;
3032
3033                 while (tid_ptr->queue_count &&
3034                        (tid_ptr->time_stamp < oldest_time)) {
3035                         tid_ptr->total -= tid_ptr->packet_count[tid_ptr->head];
3036                         tid_ptr->packet_count[tid_ptr->head] = 0;
3037                         tid_ptr->time_stamp += TID_QUEUE_CELL_SPACING;
3038                         tid_ptr->queue_count--;
3039                         tid_ptr->head++;
3040                         if (tid_ptr->head >= TID_QUEUE_MAX_SIZE)
3041                                 tid_ptr->head = 0;
3042                 }
3043         }
3044
3045         index = (tid_ptr->head + index) % TID_QUEUE_MAX_SIZE;
3046         tid_ptr->packet_count[index] = tid_ptr->packet_count[index] + 1;
3047         tid_ptr->total = tid_ptr->total + 1;
3048
3049         if ((index + 1) > tid_ptr->queue_count)
3050                 tid_ptr->queue_count = index + 1;
3051  out:
3052         spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3053
3054 }
3055
3056 #define MMAC_SCHED_MAX_NUMBER_OF_HT_BACK_FLOWS   7
3057 enum HT_STATUS {
3058         BA_STATUS_FAILURE = 0,
3059         BA_STATUS_INITIATOR_DELBA,
3060         BA_STATUS_RECIPIENT_DELBA,
3061         BA_STATUS_RENEW_ADDBA_REQUEST,
3062         BA_STATUS_ACTIVE,
3063 };
3064
3065 /**
3066  * iwl4964_tl_ba_avail - Find out if an unused aggregation queue is available
3067  */
3068 static u8 iwl4964_tl_ba_avail(struct iwl4965_priv *priv)
3069 {
3070         int i;
3071         struct iwl4965_lq_mngr *lq;
3072         u8 count = 0;
3073         u16 msk;
3074
3075         lq = (struct iwl4965_lq_mngr *)&(priv->lq_mngr);
3076
3077         /* Find out how many agg queues are in use */
3078         for (i = 0; i < TID_MAX_LOAD_COUNT ; i++) {
3079                 msk = 1 << i;
3080                 if ((lq->agg_ctrl.granted_ba & msk) ||
3081                     (lq->agg_ctrl.wait_for_agg_status & msk))
3082                         count++;
3083         }
3084
3085         if (count < MMAC_SCHED_MAX_NUMBER_OF_HT_BACK_FLOWS)
3086                 return 1;
3087
3088         return 0;
3089 }
3090
3091 static void iwl4965_ba_status(struct iwl4965_priv *priv,
3092                               u8 tid, enum HT_STATUS status);
3093
3094 static int iwl4965_perform_addba(struct iwl4965_priv *priv, u8 tid, u32 length,
3095                                  u32 ba_timeout)
3096 {
3097         int rc;
3098
3099         rc = ieee80211_start_BA_session(priv->hw, priv->bssid, tid);
3100         if (rc)
3101                 iwl4965_ba_status(priv, tid, BA_STATUS_FAILURE);
3102
3103         return rc;
3104 }
3105
3106 static int iwl4965_perform_delba(struct iwl4965_priv *priv, u8 tid)
3107 {
3108         int rc;
3109
3110         rc = ieee80211_stop_BA_session(priv->hw, priv->bssid, tid);
3111         if (rc)
3112                 iwl4965_ba_status(priv, tid, BA_STATUS_FAILURE);
3113
3114         return rc;
3115 }
3116
3117 static void iwl4965_turn_on_agg_for_tid(struct iwl4965_priv *priv,
3118                                         struct iwl4965_lq_mngr *lq,
3119                                         u8 auto_agg, u8 tid)
3120 {
3121         u32 tid_msk = (1 << tid);
3122         unsigned long flags;
3123
3124         spin_lock_irqsave(&priv->lq_mngr.lock, flags);
3125 /*
3126         if ((auto_agg) && (!lq->enable_counter)){
3127                 lq->agg_ctrl.next_retry = 0;
3128                 lq->agg_ctrl.tid_retry = 0;
3129                 spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3130                 return;
3131         }
3132 */
3133         if (!(lq->agg_ctrl.granted_ba & tid_msk) &&
3134             (lq->agg_ctrl.requested_ba & tid_msk)) {
3135                 u8 available_queues;
3136                 u32 load;
3137
3138                 spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3139                 available_queues = iwl4964_tl_ba_avail(priv);
3140                 load = iwl4965_tl_get_load(priv, tid);
3141
3142                 spin_lock_irqsave(&priv->lq_mngr.lock, flags);
3143                 if (!available_queues) {
3144                         if (auto_agg)
3145                                 lq->agg_ctrl.tid_retry |= tid_msk;
3146                         else {
3147                                 lq->agg_ctrl.requested_ba &= ~tid_msk;
3148                                 lq->agg_ctrl.wait_for_agg_status &= ~tid_msk;
3149                         }
3150                 } else if ((auto_agg) &&
3151                            ((load <= lq->agg_ctrl.tid_traffic_load_threshold) ||
3152                             ((lq->agg_ctrl.wait_for_agg_status & tid_msk))))
3153                         lq->agg_ctrl.tid_retry |= tid_msk;
3154                 else {
3155                         lq->agg_ctrl.wait_for_agg_status |= tid_msk;
3156                         spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3157                         iwl4965_perform_addba(priv, tid, 0x40,
3158                                               lq->agg_ctrl.ba_timeout);
3159                         spin_lock_irqsave(&priv->lq_mngr.lock, flags);
3160                 }
3161         }
3162         spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3163 }
3164
3165 static void iwl4965_turn_on_agg(struct iwl4965_priv *priv, u8 tid)
3166 {
3167         struct iwl4965_lq_mngr *lq;
3168         unsigned long flags;
3169
3170         lq = (struct iwl4965_lq_mngr *)&(priv->lq_mngr);
3171
3172         if ((tid < TID_MAX_LOAD_COUNT))
3173                 iwl4965_turn_on_agg_for_tid(priv, lq, lq->agg_ctrl.auto_agg,
3174                                             tid);
3175         else if (tid == TID_ALL_SPECIFIED) {
3176                 if (lq->agg_ctrl.requested_ba) {
3177                         for (tid = 0; tid < TID_MAX_LOAD_COUNT; tid++)
3178                                 iwl4965_turn_on_agg_for_tid(priv, lq,
3179                                         lq->agg_ctrl.auto_agg, tid);
3180                 } else {
3181                         spin_lock_irqsave(&priv->lq_mngr.lock, flags);
3182                         lq->agg_ctrl.tid_retry = 0;
3183                         lq->agg_ctrl.next_retry = 0;
3184                         spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3185                 }
3186         }
3187
3188 }
3189
3190 void iwl4965_turn_off_agg(struct iwl4965_priv *priv, u8 tid)
3191 {
3192         u32 tid_msk;
3193         struct iwl4965_lq_mngr *lq;
3194         unsigned long flags;
3195
3196         lq = (struct iwl4965_lq_mngr *)&(priv->lq_mngr);
3197
3198         if ((tid < TID_MAX_LOAD_COUNT)) {
3199                 tid_msk = 1 << tid;
3200                 spin_lock_irqsave(&priv->lq_mngr.lock, flags);
3201                 lq->agg_ctrl.wait_for_agg_status |= tid_msk;
3202                 lq->agg_ctrl.requested_ba &= ~tid_msk;
3203                 spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3204                 iwl4965_perform_delba(priv, tid);
3205         } else if (tid == TID_ALL_SPECIFIED) {
3206                 spin_lock_irqsave(&priv->lq_mngr.lock, flags);
3207                 for (tid = 0; tid < TID_MAX_LOAD_COUNT; tid++) {
3208                         tid_msk = 1 << tid;
3209                         lq->agg_ctrl.wait_for_agg_status |= tid_msk;
3210                         spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3211                         iwl4965_perform_delba(priv, tid);
3212                         spin_lock_irqsave(&priv->lq_mngr.lock, flags);
3213                 }
3214                 lq->agg_ctrl.requested_ba = 0;
3215                 spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3216         }
3217 }
3218
3219 /**
3220  * iwl4965_ba_status - Update driver's link quality mgr with tid's HT status
3221  */
3222 static void iwl4965_ba_status(struct iwl4965_priv *priv,
3223                                 u8 tid, enum HT_STATUS status)
3224 {
3225         struct iwl4965_lq_mngr *lq;
3226         u32 tid_msk = (1 << tid);
3227         unsigned long flags;
3228
3229         lq = (struct iwl4965_lq_mngr *)&(priv->lq_mngr);
3230
3231         if ((tid >= TID_MAX_LOAD_COUNT))
3232                 goto out;
3233
3234         spin_lock_irqsave(&priv->lq_mngr.lock, flags);
3235         switch (status) {
3236         case BA_STATUS_ACTIVE:
3237                 if (!(lq->agg_ctrl.granted_ba & tid_msk))
3238                         lq->agg_ctrl.granted_ba |= tid_msk;
3239                 break;
3240         default:
3241                 if ((lq->agg_ctrl.granted_ba & tid_msk))
3242                         lq->agg_ctrl.granted_ba &= ~tid_msk;
3243                 break;
3244         }
3245
3246         lq->agg_ctrl.wait_for_agg_status &= ~tid_msk;
3247         if (status != BA_STATUS_ACTIVE) {
3248                 if (lq->agg_ctrl.auto_agg) {
3249                         lq->agg_ctrl.tid_retry |= tid_msk;
3250                         lq->agg_ctrl.next_retry =
3251                             jiffies + msecs_to_jiffies(500);
3252                 } else
3253                         lq->agg_ctrl.requested_ba &= ~tid_msk;
3254         }
3255         spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3256  out:
3257         return;
3258 }
3259
3260 static void iwl4965_bg_agg_work(struct work_struct *work)
3261 {
3262         struct iwl4965_priv *priv = container_of(work, struct iwl4965_priv,
3263                                         agg_work);
3264
3265         u32 tid;
3266         u32 retry_tid;
3267         u32 tid_msk;
3268         unsigned long flags;
3269         struct iwl4965_lq_mngr *lq = (struct iwl4965_lq_mngr *)&(priv->lq_mngr);
3270
3271         spin_lock_irqsave(&priv->lq_mngr.lock, flags);
3272         retry_tid = lq->agg_ctrl.tid_retry;
3273         lq->agg_ctrl.tid_retry = 0;
3274         spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3275
3276         if (retry_tid == TID_ALL_SPECIFIED)
3277                 iwl4965_turn_on_agg(priv, TID_ALL_SPECIFIED);
3278         else {
3279                 for (tid = 0; tid < TID_MAX_LOAD_COUNT; tid++) {
3280                         tid_msk = (1 << tid);
3281                         if (retry_tid & tid_msk)
3282                                 iwl4965_turn_on_agg(priv, tid);
3283                 }
3284         }
3285
3286         spin_lock_irqsave(&priv->lq_mngr.lock, flags);
3287         if (lq->agg_ctrl.tid_retry)
3288                 lq->agg_ctrl.next_retry = jiffies + msecs_to_jiffies(500);
3289         spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3290         return;
3291 }
3292
3293 /* TODO: move this functionality to rate scaling */
3294 void iwl4965_tl_get_stats(struct iwl4965_priv *priv,
3295                    struct ieee80211_hdr *hdr)
3296 {
3297         __le16 *qc = ieee80211_get_qos_ctrl(hdr);
3298
3299         if (qc &&
3300             (priv->iw_mode != IEEE80211_IF_TYPE_IBSS)) {
3301                 u8 tid = 0;
3302                 tid = (u8) (le16_to_cpu(*qc) & 0xF);
3303                 if (tid < TID_MAX_LOAD_COUNT)
3304                         iwl4965_tl_add_packet(priv, tid);
3305         }
3306
3307         if (priv->lq_mngr.agg_ctrl.next_retry &&
3308             (time_after(priv->lq_mngr.agg_ctrl.next_retry, jiffies))) {
3309                 unsigned long flags;
3310
3311                 spin_lock_irqsave(&priv->lq_mngr.lock, flags);
3312                 priv->lq_mngr.agg_ctrl.next_retry = 0;
3313                 spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3314                 schedule_work(&priv->agg_work);
3315         }
3316 }
3317
3318 #endif /*CONFIG_IWL4965_HT_AGG */
3319 #endif /* CONFIG_IWL4965_HT */
3320
3321 /**
3322  * sign_extend - Sign extend a value using specified bit as sign-bit
3323  *
3324  * Example: sign_extend(9, 3) would return -7 as bit3 of 1001b is 1
3325  * and bit0..2 is 001b which when sign extended to 1111111111111001b is -7.
3326  *
3327  * @param oper value to sign extend
3328  * @param index 0 based bit index (0<=index<32) to sign bit
3329  */
3330 static s32 sign_extend(u32 oper, int index)
3331 {
3332         u8 shift = 31 - index;
3333
3334         return (s32)(oper << shift) >> shift;
3335 }
3336
3337 /**
3338  * iwl4965_get_temperature - return the calibrated temperature (in Kelvin)
3339  * @statistics: Provides the temperature reading from the uCode
3340  *
3341  * A return of <0 indicates bogus data in the statistics
3342  */
3343 int iwl4965_get_temperature(const struct iwl4965_priv *priv)
3344 {
3345         s32 temperature;
3346         s32 vt;
3347         s32 R1, R2, R3;
3348         u32 R4;
3349
3350         if (test_bit(STATUS_TEMPERATURE, &priv->status) &&
3351                 (priv->statistics.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK)) {
3352                 IWL_DEBUG_TEMP("Running FAT temperature calibration\n");
3353                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[1]);
3354                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[1]);
3355                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[1]);
3356                 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[1]);
3357         } else {
3358                 IWL_DEBUG_TEMP("Running temperature calibration\n");
3359                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[0]);
3360                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[0]);
3361                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[0]);
3362                 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[0]);
3363         }
3364
3365         /*
3366          * Temperature is only 23 bits, so sign extend out to 32.
3367          *
3368          * NOTE If we haven't received a statistics notification yet
3369          * with an updated temperature, use R4 provided to us in the
3370          * "initialize" ALIVE response.
3371          */
3372         if (!test_bit(STATUS_TEMPERATURE, &priv->status))
3373                 vt = sign_extend(R4, 23);
3374         else
3375                 vt = sign_extend(
3376                         le32_to_cpu(priv->statistics.general.temperature), 23);
3377
3378         IWL_DEBUG_TEMP("Calib values R[1-3]: %d %d %d R4: %d\n",
3379                        R1, R2, R3, vt);
3380
3381         if (R3 == R1) {
3382                 IWL_ERROR("Calibration conflict R1 == R3\n");
3383                 return -1;
3384         }
3385
3386         /* Calculate temperature in degrees Kelvin, adjust by 97%.
3387          * Add offset to center the adjustment around 0 degrees Centigrade. */
3388         temperature = TEMPERATURE_CALIB_A_VAL * (vt - R2);
3389         temperature /= (R3 - R1);
3390         temperature = (temperature * 97) / 100 +
3391             TEMPERATURE_CALIB_KELVIN_OFFSET;
3392
3393         IWL_DEBUG_TEMP("Calibrated temperature: %dK, %dC\n", temperature,
3394             KELVIN_TO_CELSIUS(temperature));
3395
3396         return temperature;
3397 }
3398
3399 /* Adjust Txpower only if temperature variance is greater than threshold. */
3400 #define IWL_TEMPERATURE_THRESHOLD   3
3401
3402 /**
3403  * iwl4965_is_temp_calib_needed - determines if new calibration is needed
3404  *
3405  * If the temperature changed has changed sufficiently, then a recalibration
3406  * is needed.
3407  *
3408  * Assumes caller will replace priv->last_temperature once calibration
3409  * executed.
3410  */
3411 static int iwl4965_is_temp_calib_needed(struct iwl4965_priv *priv)
3412 {
3413         int temp_diff;
3414
3415         if (!test_bit(STATUS_STATISTICS, &priv->status)) {
3416                 IWL_DEBUG_TEMP("Temperature not updated -- no statistics.\n");
3417                 return 0;
3418         }
3419
3420         temp_diff = priv->temperature - priv->last_temperature;
3421
3422         /* get absolute value */
3423         if (temp_diff < 0) {
3424                 IWL_DEBUG_POWER("Getting cooler, delta %d, \n", temp_diff);
3425                 temp_diff = -temp_diff;
3426         } else if (temp_diff == 0)
3427                 IWL_DEBUG_POWER("Same temp, \n");
3428         else
3429                 IWL_DEBUG_POWER("Getting warmer, delta %d, \n", temp_diff);
3430
3431         if (temp_diff < IWL_TEMPERATURE_THRESHOLD) {
3432                 IWL_DEBUG_POWER("Thermal txpower calib not needed\n");
3433                 return 0;
3434         }
3435
3436         IWL_DEBUG_POWER("Thermal txpower calib needed\n");
3437
3438         return 1;
3439 }
3440
3441 /* Calculate noise level, based on measurements during network silence just
3442  *   before arriving beacon.  This measurement can be done only if we know
3443  *   exactly when to expect beacons, therefore only when we're associated. */
3444 static void iwl4965_rx_calc_noise(struct iwl4965_priv *priv)
3445 {
3446         struct statistics_rx_non_phy *rx_info
3447                                 = &(priv->statistics.rx.general);
3448         int num_active_rx = 0;
3449         int total_silence = 0;
3450         int bcn_silence_a =
3451                 le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER;
3452         int bcn_silence_b =
3453                 le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER;
3454         int bcn_silence_c =
3455                 le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER;
3456
3457         if (bcn_silence_a) {
3458                 total_silence += bcn_silence_a;
3459                 num_active_rx++;
3460         }
3461         if (bcn_silence_b) {
3462                 total_silence += bcn_silence_b;
3463                 num_active_rx++;
3464         }
3465         if (bcn_silence_c) {
3466                 total_silence += bcn_silence_c;
3467                 num_active_rx++;
3468         }
3469
3470         /* Average among active antennas */
3471         if (num_active_rx)
3472                 priv->last_rx_noise = (total_silence / num_active_rx) - 107;
3473         else
3474                 priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
3475
3476         IWL_DEBUG_CALIB("inband silence a %u, b %u, c %u, dBm %d\n",
3477                         bcn_silence_a, bcn_silence_b, bcn_silence_c,
3478                         priv->last_rx_noise);
3479 }
3480
3481 void iwl4965_hw_rx_statistics(struct iwl4965_priv *priv, struct iwl4965_rx_mem_buffer *rxb)
3482 {
3483         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3484         int change;
3485         s32 temp;
3486
3487         IWL_DEBUG_RX("Statistics notification received (%d vs %d).\n",
3488                      (int)sizeof(priv->statistics), pkt->len);
3489
3490         change = ((priv->statistics.general.temperature !=
3491                    pkt->u.stats.general.temperature) ||
3492                   ((priv->statistics.flag &
3493                     STATISTICS_REPLY_FLG_FAT_MODE_MSK) !=
3494                    (pkt->u.stats.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK)));
3495
3496         memcpy(&priv->statistics, &pkt->u.stats, sizeof(priv->statistics));
3497
3498         set_bit(STATUS_STATISTICS, &priv->status);
3499
3500         /* Reschedule the statistics timer to occur in
3501          * REG_RECALIB_PERIOD seconds to ensure we get a
3502          * thermal update even if the uCode doesn't give
3503          * us one */
3504         mod_timer(&priv->statistics_periodic, jiffies +
3505                   msecs_to_jiffies(REG_RECALIB_PERIOD * 1000));
3506
3507         if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
3508             (pkt->hdr.cmd == STATISTICS_NOTIFICATION)) {
3509                 iwl4965_rx_calc_noise(priv);
3510 #ifdef CONFIG_IWL4965_SENSITIVITY
3511                 queue_work(priv->workqueue, &priv->sensitivity_work);
3512 #endif
3513         }
3514
3515         /* If the hardware hasn't reported a change in
3516          * temperature then don't bother computing a
3517          * calibrated temperature value */
3518         if (!change)
3519                 return;
3520
3521         temp = iwl4965_get_temperature(priv);
3522         if (temp < 0)
3523                 return;
3524
3525         if (priv->temperature != temp) {
3526                 if (priv->temperature)
3527                         IWL_DEBUG_TEMP("Temperature changed "
3528                                        "from %dC to %dC\n",
3529                                        KELVIN_TO_CELSIUS(priv->temperature),
3530                                        KELVIN_TO_CELSIUS(temp));
3531                 else
3532                         IWL_DEBUG_TEMP("Temperature "
3533                                        "initialized to %dC\n",
3534                                        KELVIN_TO_CELSIUS(temp));
3535         }
3536
3537         priv->temperature = temp;
3538         set_bit(STATUS_TEMPERATURE, &priv->status);
3539
3540         if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
3541                      iwl4965_is_temp_calib_needed(priv))
3542                 queue_work(priv->workqueue, &priv->txpower_work);
3543 }
3544
3545 static void iwl4965_add_radiotap(struct iwl4965_priv *priv,
3546                                  struct sk_buff *skb,
3547                                  struct iwl4965_rx_phy_res *rx_start,
3548                                  struct ieee80211_rx_status *stats,
3549                                  u32 ampdu_status)
3550 {
3551         s8 signal = stats->ssi;
3552         s8 noise = 0;
3553         int rate = stats->rate;
3554         u64 tsf = stats->mactime;
3555         __le16 phy_flags_hw = rx_start->phy_flags;
3556         struct iwl4965_rt_rx_hdr {
3557                 struct ieee80211_radiotap_header rt_hdr;
3558                 __le64 rt_tsf;          /* TSF */
3559                 u8 rt_flags;            /* radiotap packet flags */
3560                 u8 rt_rate;             /* rate in 500kb/s */
3561                 __le16 rt_channelMHz;   /* channel in MHz */
3562                 __le16 rt_chbitmask;    /* channel bitfield */
3563                 s8 rt_dbmsignal;        /* signal in dBm, kluged to signed */
3564                 s8 rt_dbmnoise;
3565                 u8 rt_antenna;          /* antenna number */
3566         } __attribute__ ((packed)) *iwl4965_rt;
3567
3568         /* TODO: We won't have enough headroom for HT frames. Fix it later. */
3569         if (skb_headroom(skb) < sizeof(*iwl4965_rt)) {
3570                 if (net_ratelimit())
3571                         printk(KERN_ERR "not enough headroom [%d] for "
3572                                "radiotap head [%zd]\n",
3573                                skb_headroom(skb), sizeof(*iwl4965_rt));
3574                 return;
3575         }
3576
3577         /* put radiotap header in front of 802.11 header and data */
3578         iwl4965_rt = (void *)skb_push(skb, sizeof(*iwl4965_rt));
3579
3580         /* initialise radiotap header */
3581         iwl4965_rt->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
3582         iwl4965_rt->rt_hdr.it_pad = 0;
3583
3584         /* total header + data */
3585         put_unaligned(cpu_to_le16(sizeof(*iwl4965_rt)),
3586                       &iwl4965_rt->rt_hdr.it_len);
3587
3588         /* Indicate all the fields we add to the radiotap header */
3589         put_unaligned(cpu_to_le32((1 << IEEE80211_RADIOTAP_TSFT) |
3590                                   (1 << IEEE80211_RADIOTAP_FLAGS) |
3591                                   (1 << IEEE80211_RADIOTAP_RATE) |
3592                                   (1 << IEEE80211_RADIOTAP_CHANNEL) |
3593                                   (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL) |
3594                                   (1 << IEEE80211_RADIOTAP_DBM_ANTNOISE) |
3595                                   (1 << IEEE80211_RADIOTAP_ANTENNA)),
3596                       &iwl4965_rt->rt_hdr.it_present);
3597
3598         /* Zero the flags, we'll add to them as we go */
3599         iwl4965_rt->rt_flags = 0;
3600
3601         put_unaligned(cpu_to_le64(tsf), &iwl4965_rt->rt_tsf);
3602
3603         iwl4965_rt->rt_dbmsignal = signal;
3604         iwl4965_rt->rt_dbmnoise = noise;
3605
3606         /* Convert the channel frequency and set the flags */
3607         put_unaligned(cpu_to_le16(stats->freq), &iwl4965_rt->rt_channelMHz);
3608         if (!(phy_flags_hw & RX_RES_PHY_FLAGS_BAND_24_MSK))
3609                 put_unaligned(cpu_to_le16(IEEE80211_CHAN_OFDM |
3610                                           IEEE80211_CHAN_5GHZ),
3611                               &iwl4965_rt->rt_chbitmask);
3612         else if (phy_flags_hw & RX_RES_PHY_FLAGS_MOD_CCK_MSK)
3613                 put_unaligned(cpu_to_le16(IEEE80211_CHAN_CCK |
3614                                           IEEE80211_CHAN_2GHZ),
3615                               &iwl4965_rt->rt_chbitmask);
3616         else    /* 802.11g */
3617                 put_unaligned(cpu_to_le16(IEEE80211_CHAN_OFDM |
3618                                           IEEE80211_CHAN_2GHZ),
3619                               &iwl4965_rt->rt_chbitmask);
3620
3621         rate = iwl4965_rate_index_from_plcp(rate);
3622         if (rate == -1)
3623                 iwl4965_rt->rt_rate = 0;
3624         else
3625                 iwl4965_rt->rt_rate = iwl4965_rates[rate].ieee;
3626
3627         /*
3628          * "antenna number"
3629          *
3630          * It seems that the antenna field in the phy flags value
3631          * is actually a bitfield. This is undefined by radiotap,
3632          * it wants an actual antenna number but I always get "7"
3633          * for most legacy frames I receive indicating that the
3634          * same frame was received on all three RX chains.
3635          *
3636          * I think this field should be removed in favour of a
3637          * new 802.11n radiotap field "RX chains" that is defined
3638          * as a bitmask.
3639          */
3640         iwl4965_rt->rt_antenna =
3641                 le16_to_cpu(phy_flags_hw & RX_RES_PHY_FLAGS_ANTENNA_MSK) >> 4;
3642
3643         /* set the preamble flag if appropriate */
3644         if (phy_flags_hw & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
3645                 iwl4965_rt->rt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;
3646
3647         stats->flag |= RX_FLAG_RADIOTAP;
3648 }
3649
3650 static void iwl4965_handle_data_packet(struct iwl4965_priv *priv, int is_data,
3651                                        int include_phy,
3652                                        struct iwl4965_rx_mem_buffer *rxb,
3653                                        struct ieee80211_rx_status *stats)
3654 {
3655         struct iwl4965_rx_packet *pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
3656         struct iwl4965_rx_phy_res *rx_start = (include_phy) ?
3657             (struct iwl4965_rx_phy_res *)&(pkt->u.raw[0]) : NULL;
3658         struct ieee80211_hdr *hdr;
3659         u16 len;
3660         __le32 *rx_end;
3661         unsigned int skblen;
3662         u32 ampdu_status;
3663
3664         if (!include_phy && priv->last_phy_res[0])
3665                 rx_start = (struct iwl4965_rx_phy_res *)&priv->last_phy_res[1];
3666
3667         if (!rx_start) {
3668                 IWL_ERROR("MPDU frame without a PHY data\n");
3669                 return;
3670         }
3671         if (include_phy) {
3672                 hdr = (struct ieee80211_hdr *)((u8 *) & rx_start[1] +
3673                                                rx_start->cfg_phy_cnt);
3674
3675                 len = le16_to_cpu(rx_start->byte_count);
3676
3677                 rx_end = (__le32 *) ((u8 *) & pkt->u.raw[0] +
3678                                   sizeof(struct iwl4965_rx_phy_res) +
3679                                   rx_start->cfg_phy_cnt + len);
3680
3681         } else {
3682                 struct iwl4965_rx_mpdu_res_start *amsdu =
3683                     (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw;
3684
3685                 hdr = (struct ieee80211_hdr *)(pkt->u.raw +
3686                                sizeof(struct iwl4965_rx_mpdu_res_start));
3687                 len =  le16_to_cpu(amsdu->byte_count);
3688                 rx_start->byte_count = amsdu->byte_count;
3689                 rx_end = (__le32 *) (((u8 *) hdr) + len);
3690         }
3691         if (len > priv->hw_setting.max_pkt_size || len < 16) {
3692                 IWL_WARNING("byte count out of range [16,4K] : %d\n", len);
3693                 return;
3694         }
3695
3696         ampdu_status = le32_to_cpu(*rx_end);
3697         skblen = ((u8 *) rx_end - (u8 *) & pkt->u.raw[0]) + sizeof(u32);
3698
3699         /* start from MAC */
3700         skb_reserve(rxb->skb, (void *)hdr - (void *)pkt);
3701         skb_put(rxb->skb, len); /* end where data ends */
3702
3703         /* We only process data packets if the interface is open */
3704         if (unlikely(!priv->is_open)) {
3705                 IWL_DEBUG_DROP_LIMIT
3706                     ("Dropping packet while interface is not open.\n");
3707                 return;
3708         }
3709
3710         stats->flag = 0;
3711         hdr = (struct ieee80211_hdr *)rxb->skb->data;
3712
3713         if (iwl4965_param_hwcrypto)
3714                 iwl4965_set_decrypted_flag(priv, rxb->skb, ampdu_status, stats);
3715
3716         if (priv->add_radiotap)
3717                 iwl4965_add_radiotap(priv, rxb->skb, rx_start, stats, ampdu_status);
3718
3719         ieee80211_rx_irqsafe(priv->hw, rxb->skb, stats);
3720         priv->alloc_rxb_skb--;
3721         rxb->skb = NULL;
3722 #ifdef LED
3723         priv->led_packets += len;
3724         iwl4965_setup_activity_timer(priv);
3725 #endif
3726 }
3727
3728 /* Calc max signal level (dBm) among 3 possible receivers */
3729 static int iwl4965_calc_rssi(struct iwl4965_rx_phy_res *rx_resp)
3730 {
3731         /* data from PHY/DSP regarding signal strength, etc.,
3732          *   contents are always there, not configurable by host.  */
3733         struct iwl4965_rx_non_cfg_phy *ncphy =
3734             (struct iwl4965_rx_non_cfg_phy *)rx_resp->non_cfg_phy;
3735         u32 agc = (le16_to_cpu(ncphy->agc_info) & IWL_AGC_DB_MASK)
3736                         >> IWL_AGC_DB_POS;
3737
3738         u32 valid_antennae =
3739             (le16_to_cpu(rx_resp->phy_flags) & RX_PHY_FLAGS_ANTENNAE_MASK)
3740                         >> RX_PHY_FLAGS_ANTENNAE_OFFSET;
3741         u8 max_rssi = 0;
3742         u32 i;
3743
3744         /* Find max rssi among 3 possible receivers.
3745          * These values are measured by the digital signal processor (DSP).
3746          * They should stay fairly constant even as the signal strength varies,
3747          *   if the radio's automatic gain control (AGC) is working right.
3748          * AGC value (see below) will provide the "interesting" info. */
3749         for (i = 0; i < 3; i++)
3750                 if (valid_antennae & (1 << i))
3751                         max_rssi = max(ncphy->rssi_info[i << 1], max_rssi);
3752
3753         IWL_DEBUG_STATS("Rssi In A %d B %d C %d Max %d AGC dB %d\n",
3754                 ncphy->rssi_info[0], ncphy->rssi_info[2], ncphy->rssi_info[4],
3755                 max_rssi, agc);
3756
3757         /* dBm = max_rssi dB - agc dB - constant.
3758          * Higher AGC (higher radio gain) means lower signal. */
3759         return (max_rssi - agc - IWL_RSSI_OFFSET);
3760 }
3761
3762 #ifdef CONFIG_IWL4965_HT
3763
3764 /* Parsed Information Elements */
3765 struct ieee802_11_elems {
3766         u8 *ds_params;
3767         u8 ds_params_len;
3768         u8 *tim;
3769         u8 tim_len;
3770         u8 *ibss_params;
3771         u8 ibss_params_len;
3772         u8 *erp_info;
3773         u8 erp_info_len;
3774         u8 *ht_cap_param;
3775         u8 ht_cap_param_len;
3776         u8 *ht_extra_param;
3777         u8 ht_extra_param_len;
3778 };
3779
3780 static int parse_elems(u8 *start, size_t len, struct ieee802_11_elems *elems)
3781 {
3782         size_t left = len;
3783         u8 *pos = start;
3784         int unknown = 0;
3785
3786         memset(elems, 0, sizeof(*elems));
3787
3788         while (left >= 2) {
3789                 u8 id, elen;
3790
3791                 id = *pos++;
3792                 elen = *pos++;
3793                 left -= 2;
3794
3795                 if (elen > left)
3796                         return -1;
3797
3798                 switch (id) {
3799                 case WLAN_EID_DS_PARAMS:
3800                         elems->ds_params = pos;
3801                         elems->ds_params_len = elen;
3802                         break;
3803                 case WLAN_EID_TIM:
3804                         elems->tim = pos;
3805                         elems->tim_len = elen;
3806                         break;
3807                 case WLAN_EID_IBSS_PARAMS:
3808                         elems->ibss_params = pos;
3809                         elems->ibss_params_len = elen;
3810                         break;
3811                 case WLAN_EID_ERP_INFO:
3812                         elems->erp_info = pos;
3813                         elems->erp_info_len = elen;
3814                         break;
3815                 case WLAN_EID_HT_CAPABILITY:
3816                         elems->ht_cap_param = pos;
3817                         elems->ht_cap_param_len = elen;
3818                         break;
3819                 case WLAN_EID_HT_EXTRA_INFO:
3820                         elems->ht_extra_param = pos;
3821                         elems->ht_extra_param_len = elen;
3822                         break;
3823                 default:
3824                         unknown++;
3825                         break;
3826                 }
3827
3828                 left -= elen;
3829                 pos += elen;
3830         }
3831
3832         return 0;
3833 }
3834
3835 void iwl4965_init_ht_hw_capab(struct ieee80211_ht_info *ht_info, int mode)
3836 {
3837         ht_info->cap = 0;
3838         memset(ht_info->supp_mcs_set, 0, 16);
3839
3840         ht_info->ht_supported = 1;
3841
3842         if (mode == MODE_IEEE80211A) {
3843                 ht_info->cap |= (u16)IEEE80211_HT_CAP_SUP_WIDTH;
3844                 ht_info->cap |= (u16)IEEE80211_HT_CAP_SGI_40;
3845                 ht_info->supp_mcs_set[4] = 0x01;
3846         }
3847         ht_info->cap |= (u16)IEEE80211_HT_CAP_GRN_FLD;
3848         ht_info->cap |= (u16)IEEE80211_HT_CAP_SGI_20;
3849         ht_info->cap |= (u16)(IEEE80211_HT_CAP_MIMO_PS &
3850                              (IWL_MIMO_PS_NONE << 2));
3851         if (iwl4965_param_amsdu_size_8K) {
3852                 printk(KERN_DEBUG "iwl4965 in A-MSDU 8K support mode\n");
3853                 ht_info->cap |= (u16)IEEE80211_HT_CAP_MAX_AMSDU;
3854         }
3855
3856         ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
3857         ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
3858
3859         ht_info->supp_mcs_set[0] = 0xFF;
3860         ht_info->supp_mcs_set[1] = 0xFF;
3861 }
3862 #endif /* CONFIG_IWL4965_HT */
3863
3864 static void iwl4965_sta_modify_ps_wake(struct iwl4965_priv *priv, int sta_id)
3865 {
3866         unsigned long flags;
3867
3868         spin_lock_irqsave(&priv->sta_lock, flags);
3869         priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
3870         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
3871         priv->stations[sta_id].sta.sta.modify_mask = 0;
3872         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3873         spin_unlock_irqrestore(&priv->sta_lock, flags);
3874
3875         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
3876 }
3877
3878 static void iwl4965_update_ps_mode(struct iwl4965_priv *priv, u16 ps_bit, u8 *addr)
3879 {
3880         /* FIXME: need locking over ps_status ??? */
3881         u8 sta_id = iwl4965_hw_find_station(priv, addr);
3882
3883         if (sta_id != IWL_INVALID_STATION) {
3884                 u8 sta_awake = priv->stations[sta_id].
3885                                 ps_status == STA_PS_STATUS_WAKE;
3886
3887                 if (sta_awake && ps_bit)
3888                         priv->stations[sta_id].ps_status = STA_PS_STATUS_SLEEP;
3889                 else if (!sta_awake && !ps_bit) {
3890                         iwl4965_sta_modify_ps_wake(priv, sta_id);
3891                         priv->stations[sta_id].ps_status = STA_PS_STATUS_WAKE;
3892                 }
3893         }
3894 }
3895
3896 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
3897
3898 /* Called for REPLY_4965_RX (legacy ABG frames), or
3899  * REPLY_RX_MPDU_CMD (HT high-throughput N frames). */
3900 static void iwl4965_rx_reply_rx(struct iwl4965_priv *priv,
3901                                 struct iwl4965_rx_mem_buffer *rxb)
3902 {
3903         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3904         /* Use phy data (Rx signal strength, etc.) contained within
3905          *   this rx packet for legacy frames,
3906          *   or phy data cached from REPLY_RX_PHY_CMD for HT frames. */
3907         int include_phy = (pkt->hdr.cmd == REPLY_4965_RX);
3908         struct iwl4965_rx_phy_res *rx_start = (include_phy) ?
3909                 (struct iwl4965_rx_phy_res *)&(pkt->u.raw[0]) :
3910                 (struct iwl4965_rx_phy_res *)&priv->last_phy_res[1];
3911         __le32 *rx_end;
3912         unsigned int len = 0;
3913         struct ieee80211_hdr *header;
3914         u16 fc;
3915         struct ieee80211_rx_status stats = {
3916                 .mactime = le64_to_cpu(rx_start->timestamp),
3917                 .channel = le16_to_cpu(rx_start->channel),
3918                 .phymode =
3919                         (rx_start->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ?
3920                         MODE_IEEE80211G : MODE_IEEE80211A,
3921                 .antenna = 0,
3922                 .rate = iwl4965_hw_get_rate(rx_start->rate_n_flags),
3923                 .flag = 0,
3924         };
3925         u8 network_packet;
3926
3927         if ((unlikely(rx_start->cfg_phy_cnt > 20))) {
3928                 IWL_DEBUG_DROP
3929                         ("dsp size out of range [0,20]: "
3930                          "%d/n", rx_start->cfg_phy_cnt);
3931                 return;
3932         }
3933         if (!include_phy) {
3934                 if (priv->last_phy_res[0])
3935                         rx_start = (struct iwl4965_rx_phy_res *)
3936                                 &priv->last_phy_res[1];
3937                 else
3938                         rx_start = NULL;
3939         }
3940
3941         if (!rx_start) {
3942                 IWL_ERROR("MPDU frame without a PHY data\n");
3943                 return;
3944         }
3945
3946         if (include_phy) {
3947                 header = (struct ieee80211_hdr *)((u8 *) & rx_start[1]
3948                                                   + rx_start->cfg_phy_cnt);
3949
3950                 len = le16_to_cpu(rx_start->byte_count);
3951                 rx_end = (__le32 *) (pkt->u.raw + rx_start->cfg_phy_cnt +
3952                                   sizeof(struct iwl4965_rx_phy_res) + len);
3953         } else {
3954                 struct iwl4965_rx_mpdu_res_start *amsdu =
3955                         (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw;
3956
3957                 header = (void *)(pkt->u.raw +
3958                         sizeof(struct iwl4965_rx_mpdu_res_start));
3959                 len = le16_to_cpu(amsdu->byte_count);
3960                 rx_end = (__le32 *) (pkt->u.raw +
3961                         sizeof(struct iwl4965_rx_mpdu_res_start) + len);
3962         }
3963
3964         if (!(*rx_end & RX_RES_STATUS_NO_CRC32_ERROR) ||
3965             !(*rx_end & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
3966                 IWL_DEBUG_RX("Bad CRC or FIFO: 0x%08X.\n",
3967                                 le32_to_cpu(*rx_end));
3968                 return;
3969         }
3970
3971         priv->ucode_beacon_time = le32_to_cpu(rx_start->beacon_time_stamp);
3972
3973         stats.freq = ieee80211chan2mhz(stats.channel);
3974
3975         /* Find max signal strength (dBm) among 3 antenna/receiver chains */
3976         stats.ssi = iwl4965_calc_rssi(rx_start);
3977
3978         /* Meaningful noise values are available only from beacon statistics,
3979          *   which are gathered only when associated, and indicate noise
3980          *   only for the associated network channel ...
3981          * Ignore these noise values while scanning (other channels) */
3982         if (iwl4965_is_associated(priv) &&
3983             !test_bit(STATUS_SCANNING, &priv->status)) {
3984                 stats.noise = priv->last_rx_noise;
3985                 stats.signal = iwl4965_calc_sig_qual(stats.ssi, stats.noise);
3986         } else {
3987                 stats.noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
3988                 stats.signal = iwl4965_calc_sig_qual(stats.ssi, 0);
3989         }
3990
3991         /* Reset beacon noise level if not associated. */
3992         if (!iwl4965_is_associated(priv))
3993                 priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
3994
3995 #ifdef CONFIG_IWL4965_DEBUG
3996         /* TODO:  Parts of iwl4965_report_frame are broken for 4965 */
3997         if (iwl4965_debug_level & (IWL_DL_RX))
3998                 /* Set "1" to report good data frames in groups of 100 */
3999                 iwl4965_report_frame(priv, pkt, header, 1);
4000
4001         if (iwl4965_debug_level & (IWL_DL_RX | IWL_DL_STATS))
4002         IWL_DEBUG_RX("Rssi %d, noise %d, qual %d, TSF %lu\n",
4003                 stats.ssi, stats.noise, stats.signal,
4004                  (long unsigned int)le64_to_cpu(rx_start->timestamp));
4005 #endif
4006
4007         network_packet = iwl4965_is_network_packet(priv, header);
4008         if (network_packet) {
4009                 priv->last_rx_rssi = stats.ssi;
4010                 priv->last_beacon_time =  priv->ucode_beacon_time;
4011                 priv->last_tsf = le64_to_cpu(rx_start->timestamp);
4012         }
4013
4014         fc = le16_to_cpu(header->frame_control);
4015         switch (fc & IEEE80211_FCTL_FTYPE) {
4016         case IEEE80211_FTYPE_MGMT:
4017
4018                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
4019                         iwl4965_update_ps_mode(priv, fc  & IEEE80211_FCTL_PM,
4020                                                 header->addr2);
4021                 switch (fc & IEEE80211_FCTL_STYPE) {
4022                 case IEEE80211_STYPE_PROBE_RESP:
4023                 case IEEE80211_STYPE_BEACON:
4024                         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA &&
4025                              !compare_ether_addr(header->addr2, priv->bssid)) ||
4026                             (priv->iw_mode == IEEE80211_IF_TYPE_IBSS &&
4027                              !compare_ether_addr(header->addr3, priv->bssid))) {
4028                                 struct ieee80211_mgmt *mgmt =
4029                                         (struct ieee80211_mgmt *)header;
4030                                 u64 timestamp =
4031                                         le64_to_cpu(mgmt->u.beacon.timestamp);
4032
4033                                 priv->timestamp0 = timestamp & 0xFFFFFFFF;
4034                                 priv->timestamp1 =
4035                                         (timestamp >> 32) & 0xFFFFFFFF;
4036                                 priv->beacon_int = le16_to_cpu(
4037                                     mgmt->u.beacon.beacon_int);
4038                                 if (priv->call_post_assoc_from_beacon &&
4039                                     (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
4040                                         priv->call_post_assoc_from_beacon = 0;
4041                                         queue_work(priv->workqueue,
4042                                             &priv->post_associate.work);
4043                                 }
4044                         }
4045                         break;
4046
4047                 case IEEE80211_STYPE_ACTION:
4048                         break;
4049
4050                         /*
4051                          * TODO: Use the new callback function from
4052                          * mac80211 instead of sniffing these packets.
4053                          */
4054                 case IEEE80211_STYPE_ASSOC_RESP:
4055                 case IEEE80211_STYPE_REASSOC_RESP:
4056                         if (network_packet) {
4057 #ifdef CONFIG_IWL4965_HT
4058                                 u8 *pos = NULL;
4059                                 struct ieee802_11_elems elems;
4060 #endif                          /*CONFIG_IWL4965_HT */
4061                                 struct ieee80211_mgmt *mgnt =
4062                                         (struct ieee80211_mgmt *)header;
4063
4064                                 /* We have just associated, give some
4065                                  * time for the 4-way handshake if
4066                                  * any. Don't start scan too early. */
4067                                 priv->next_scan_jiffies = jiffies +
4068                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
4069
4070                                 priv->assoc_id = (~((1 << 15) | (1 << 14))
4071                                         & le16_to_cpu(mgnt->u.assoc_resp.aid));
4072                                 priv->assoc_capability =
4073                                         le16_to_cpu(
4074                                                 mgnt->u.assoc_resp.capab_info);
4075 #ifdef CONFIG_IWL4965_HT
4076                                 pos = mgnt->u.assoc_resp.variable;
4077                                 if (!parse_elems(pos,
4078                                                  len - (pos - (u8 *) mgnt),
4079                                                  &elems)) {
4080                                         if (elems.ht_extra_param &&
4081                                             elems.ht_cap_param)
4082                                                 break;
4083                                 }
4084 #endif                          /*CONFIG_IWL4965_HT */
4085                                 /* assoc_id is 0 no association */
4086                                 if (!priv->assoc_id)
4087                                         break;
4088                                 if (priv->beacon_int)
4089                                         queue_work(priv->workqueue,
4090                                             &priv->post_associate.work);
4091                                 else
4092                                         priv->call_post_assoc_from_beacon = 1;
4093                         }
4094
4095                         break;
4096
4097                 case IEEE80211_STYPE_PROBE_REQ:
4098                         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
4099                             !iwl4965_is_associated(priv)) {
4100                                 DECLARE_MAC_BUF(mac1);
4101                                 DECLARE_MAC_BUF(mac2);
4102                                 DECLARE_MAC_BUF(mac3);
4103
4104                                 IWL_DEBUG_DROP("Dropping (non network): "
4105                                                "%s, %s, %s\n",
4106                                                print_mac(mac1, header->addr1),
4107                                                print_mac(mac2, header->addr2),
4108                                                print_mac(mac3, header->addr3));
4109                                 return;
4110                         }
4111                 }
4112                 iwl4965_handle_data_packet(priv, 0, include_phy, rxb, &stats);
4113                 break;
4114
4115         case IEEE80211_FTYPE_CTL:
4116 #ifdef CONFIG_IWL4965_HT
4117                 switch (fc & IEEE80211_FCTL_STYPE) {
4118                 case IEEE80211_STYPE_BACK_REQ:
4119                         IWL_DEBUG_HT("IEEE80211_STYPE_BACK_REQ arrived\n");
4120                         iwl4965_handle_data_packet(priv, 0, include_phy,
4121                                                 rxb, &stats);
4122                         break;
4123                 default:
4124                         break;
4125                 }
4126 #endif
4127                 break;
4128
4129         case IEEE80211_FTYPE_DATA: {
4130                 DECLARE_MAC_BUF(mac1);
4131                 DECLARE_MAC_BUF(mac2);
4132                 DECLARE_MAC_BUF(mac3);
4133
4134                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
4135                         iwl4965_update_ps_mode(priv, fc  & IEEE80211_FCTL_PM,
4136                                                 header->addr2);
4137
4138                 if (unlikely(!network_packet))
4139                         IWL_DEBUG_DROP("Dropping (non network): "
4140                                        "%s, %s, %s\n",
4141                                        print_mac(mac1, header->addr1),
4142                                        print_mac(mac2, header->addr2),
4143                                        print_mac(mac3, header->addr3));
4144                 else if (unlikely(iwl4965_is_duplicate_packet(priv, header)))
4145                         IWL_DEBUG_DROP("Dropping (dup): %s, %s, %s\n",
4146                                        print_mac(mac1, header->addr1),
4147                                        print_mac(mac2, header->addr2),
4148                                        print_mac(mac3, header->addr3));
4149                 else
4150                         iwl4965_handle_data_packet(priv, 1, include_phy, rxb,
4151                                                    &stats);
4152                 break;
4153         }
4154         default:
4155                 break;
4156
4157         }
4158 }
4159
4160 /* Cache phy data (Rx signal strength, etc) for HT frame (REPLY_RX_PHY_CMD).
4161  * This will be used later in iwl4965_rx_reply_rx() for REPLY_RX_MPDU_CMD. */
4162 static void iwl4965_rx_reply_rx_phy(struct iwl4965_priv *priv,
4163                                     struct iwl4965_rx_mem_buffer *rxb)
4164 {
4165         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
4166         priv->last_phy_res[0] = 1;
4167         memcpy(&priv->last_phy_res[1], &(pkt->u.raw[0]),
4168                sizeof(struct iwl4965_rx_phy_res));
4169 }
4170
4171 static void iwl4965_rx_missed_beacon_notif(struct iwl4965_priv *priv,
4172                                            struct iwl4965_rx_mem_buffer *rxb)
4173
4174 {
4175 #ifdef CONFIG_IWL4965_SENSITIVITY
4176         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
4177         struct iwl4965_missed_beacon_notif *missed_beacon;
4178
4179         missed_beacon = &pkt->u.missed_beacon;
4180         if (le32_to_cpu(missed_beacon->consequtive_missed_beacons) > 5) {
4181                 IWL_DEBUG_CALIB("missed bcn cnsq %d totl %d rcd %d expctd %d\n",
4182                     le32_to_cpu(missed_beacon->consequtive_missed_beacons),
4183                     le32_to_cpu(missed_beacon->total_missed_becons),
4184                     le32_to_cpu(missed_beacon->num_recvd_beacons),
4185                     le32_to_cpu(missed_beacon->num_expected_beacons));
4186                 priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
4187                 if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)))
4188                         queue_work(priv->workqueue, &priv->sensitivity_work);
4189         }
4190 #endif /*CONFIG_IWL4965_SENSITIVITY*/
4191 }
4192
4193 #ifdef CONFIG_IWL4965_HT
4194 #ifdef CONFIG_IWL4965_HT_AGG
4195
4196 /**
4197  * iwl4965_set_tx_status - Update driver's record of one Tx frame's status
4198  *
4199  * This will get sent to mac80211.
4200  */
4201 static void iwl4965_set_tx_status(struct iwl4965_priv *priv, int txq_id, int idx,
4202                                   u32 status, u32 retry_count, u32 rate)
4203 {
4204         struct ieee80211_tx_status *tx_status =
4205                 &(priv->txq[txq_id].txb[idx].status);
4206
4207         tx_status->flags = status ? IEEE80211_TX_STATUS_ACK : 0;
4208         tx_status->retry_count += retry_count;
4209         tx_status->control.tx_rate = rate;
4210 }
4211
4212 #endif/* CONFIG_IWL4965_HT_AGG */
4213
4214 /**
4215  * iwl4965_sta_modify_enable_tid_tx - Enable Tx for this TID in station table
4216  */
4217 static void iwl4965_sta_modify_enable_tid_tx(struct iwl4965_priv *priv,
4218                                          int sta_id, int tid)
4219 {
4220         unsigned long flags;
4221
4222         /* Remove "disable" flag, to enable Tx for this TID */
4223         spin_lock_irqsave(&priv->sta_lock, flags);
4224         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
4225         priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
4226         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
4227         spin_unlock_irqrestore(&priv->sta_lock, flags);
4228
4229         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
4230 }
4231
4232 /**
4233  * iwl4965_tx_status_reply_compressed_ba - Update tx status from block-ack
4234  *
4235  * Go through block-ack's bitmap of ACK'd frames, update driver's record of
4236  * ACK vs. not.  This gets sent to mac80211, then to rate scaling algo.
4237  */
4238 static int iwl4965_tx_status_reply_compressed_ba(struct iwl4965_priv *priv,
4239                                                  struct iwl4965_ht_agg *agg,
4240                                                  struct iwl4965_compressed_ba_resp*
4241                                                  ba_resp)
4242
4243 {
4244         int i, sh, ack;
4245         u16 seq_ctl = le16_to_cpu(ba_resp->seq_ctl);
4246         u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
4247         u64 bitmap;
4248         int successes = 0;
4249         struct ieee80211_tx_status *tx_status;
4250
4251         if (unlikely(!agg->wait_for_ba))  {
4252                 IWL_ERROR("Received BA when not expected\n");
4253                 return -EINVAL;
4254         }
4255
4256         /* Mark that the expected block-ack response arrived */
4257         agg->wait_for_ba = 0;
4258         IWL_DEBUG_TX_REPLY("BA %d %d\n", agg->start_idx, ba_resp->seq_ctl);
4259
4260         /* Calculate shift to align block-ack bits with our Tx window bits */
4261         sh = agg->start_idx - SEQ_TO_INDEX(seq_ctl>>4);
4262         if (sh < 0) /* tbw something is wrong with indices */
4263                 sh += 0x100;
4264
4265         /* don't use 64-bit values for now */
4266         bitmap = le64_to_cpu(ba_resp->bitmap) >> sh;
4267
4268         if (agg->frame_count > (64 - sh)) {
4269                 IWL_DEBUG_TX_REPLY("more frames than bitmap size");
4270                 return -1;
4271         }
4272
4273         /* check for success or failure according to the
4274          * transmitted bitmap and block-ack bitmap */
4275         bitmap &= agg->bitmap;
4276
4277         /* For each frame attempted in aggregation,
4278          * update driver's record of tx frame's status. */
4279         for (i = 0; i < agg->frame_count ; i++) {
4280                 ack = bitmap & (1 << i);
4281                 successes += !!ack;
4282                 IWL_DEBUG_TX_REPLY("%s ON i=%d idx=%d raw=%d\n",
4283                         ack? "ACK":"NACK", i, (agg->start_idx + i) & 0xff,
4284                         agg->start_idx + i);
4285         }
4286
4287         tx_status = &priv->txq[scd_flow].txb[agg->start_idx].status;
4288         tx_status->flags = IEEE80211_TX_STATUS_ACK;
4289         tx_status->flags |= IEEE80211_TX_STATUS_AMPDU;
4290         tx_status->ampdu_ack_map = successes;
4291         tx_status->ampdu_ack_len = agg->frame_count;
4292         tx_status->control.tx_rate = agg->rate_n_flags;
4293
4294         IWL_DEBUG_TX_REPLY("Bitmap %llx\n", bitmap);
4295
4296         return 0;
4297 }
4298
4299 /**
4300  * iwl4965_tx_queue_stop_scheduler - Stop queue, but keep configuration
4301  */
4302 static void iwl4965_tx_queue_stop_scheduler(struct iwl4965_priv *priv,
4303                                             u16 txq_id)
4304 {
4305         /* Simply stop the queue, but don't change any configuration;
4306          * the SCD_ACT_EN bit is the write-enable mask for the ACTIVE bit. */
4307         iwl4965_write_prph(priv,
4308                 KDR_SCD_QUEUE_STATUS_BITS(txq_id),
4309                 (0 << SCD_QUEUE_STTS_REG_POS_ACTIVE)|
4310                 (1 << SCD_QUEUE_STTS_REG_POS_SCD_ACT_EN));
4311 }
4312
4313 /**
4314  * txq_id must be greater than IWL_BACK_QUEUE_FIRST_ID
4315  */
4316 static int iwl4965_tx_queue_agg_disable(struct iwl4965_priv *priv, u16 txq_id,
4317                                         u16 ssn_idx, u8 tx_fifo)
4318 {
4319         if (IWL_BACK_QUEUE_FIRST_ID > txq_id) {
4320                 IWL_WARNING("queue number too small: %d, must be > %d\n",
4321                                 txq_id, IWL_BACK_QUEUE_FIRST_ID);
4322                 return -EINVAL;
4323         }
4324
4325         iwl4965_tx_queue_stop_scheduler(priv, txq_id);
4326
4327         iwl4965_clear_bits_prph(priv, KDR_SCD_QUEUECHAIN_SEL, (1 << txq_id));
4328
4329         priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
4330         priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
4331         /* supposes that ssn_idx is valid (!= 0xFFF) */
4332         iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
4333
4334         iwl4965_clear_bits_prph(priv, KDR_SCD_INTERRUPT_MASK, (1 << txq_id));
4335         iwl4965_txq_ctx_deactivate(priv, txq_id);
4336         iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 0);
4337
4338         return 0;
4339 }
4340
4341 int iwl4965_check_empty_hw_queue(struct iwl4965_priv *priv, int sta_id,
4342                                          u8 tid, int txq_id)
4343 {
4344         struct iwl4965_queue *q = &priv->txq[txq_id].q;
4345         u8 *addr = priv->stations[sta_id].sta.sta.addr;
4346         struct iwl4965_tid_data *tid_data = &priv->stations[sta_id].tid[tid];
4347
4348         switch (priv->stations[sta_id].tid[tid].agg.state) {
4349         case IWL_EMPTYING_HW_QUEUE_DELBA:
4350                 /* We are reclaiming the last packet of the */
4351                 /* aggregated HW queue */
4352                 if (txq_id  == tid_data->agg.txq_id &&
4353                     q->read_ptr == q->write_ptr) {
4354                         u16 ssn = SEQ_TO_SN(tid_data->seq_number);
4355                         int tx_fifo = default_tid_to_tx_fifo[tid];
4356                         IWL_DEBUG_HT("HW queue empty: continue DELBA flow\n");
4357                         iwl4965_tx_queue_agg_disable(priv, txq_id,
4358                                                      ssn, tx_fifo);
4359                         tid_data->agg.state = IWL_AGG_OFF;
4360                         ieee80211_stop_tx_ba_cb_irqsafe(priv->hw, addr, tid);
4361                 }
4362                 break;
4363         case IWL_EMPTYING_HW_QUEUE_ADDBA:
4364                 /* We are reclaiming the last packet of the queue */
4365                 if (tid_data->tfds_in_queue == 0) {
4366                         IWL_DEBUG_HT("HW queue empty: continue ADDBA flow\n");
4367                         tid_data->agg.state = IWL_AGG_ON;
4368                         ieee80211_start_tx_ba_cb_irqsafe(priv->hw, addr, tid);
4369                 }
4370                 break;
4371         }
4372         return 0;
4373 }
4374
4375 /**
4376  * iwl4965_queue_dec_wrap - Decrement queue index, wrap back to end if needed
4377  * @index -- current index
4378  * @n_bd -- total number of entries in queue (s/b power of 2)
4379  */
4380 static inline int iwl4965_queue_dec_wrap(int index, int n_bd)
4381 {
4382         return (index == 0) ? n_bd - 1 : index - 1;
4383 }
4384
4385 /**
4386  * iwl4965_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
4387  *
4388  * Handles block-acknowledge notification from device, which reports success
4389  * of frames sent via aggregation.
4390  */
4391 static void iwl4965_rx_reply_compressed_ba(struct iwl4965_priv *priv,
4392                                            struct iwl4965_rx_mem_buffer *rxb)
4393 {
4394         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
4395         struct iwl4965_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba;
4396         int index;
4397         struct iwl4965_tx_queue *txq = NULL;
4398         struct iwl4965_ht_agg *agg;
4399         DECLARE_MAC_BUF(mac);
4400
4401         /* "flow" corresponds to Tx queue */
4402         u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
4403
4404         /* "ssn" is start of block-ack Tx window, corresponds to index
4405          * (in Tx queue's circular buffer) of first TFD/frame in window */
4406         u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
4407
4408         if (scd_flow >= ARRAY_SIZE(priv->txq)) {
4409                 IWL_ERROR("BUG_ON scd_flow is bigger than number of queues");
4410                 return;
4411         }
4412
4413         txq = &priv->txq[scd_flow];
4414         agg = &priv->stations[ba_resp->sta_id].tid[ba_resp->tid].agg;
4415
4416         /* Find index just before block-ack window */
4417         index = iwl4965_queue_dec_wrap(ba_resp_scd_ssn & 0xff, txq->q.n_bd);
4418
4419         /* TODO: Need to get this copy more safely - now good for debug */
4420
4421         IWL_DEBUG_TX_REPLY("REPLY_COMPRESSED_BA [%d]Received from %s, "
4422                            "sta_id = %d\n",
4423                            agg->wait_for_ba,
4424                            print_mac(mac, (u8*) &ba_resp->sta_addr_lo32),
4425                            ba_resp->sta_id);
4426         IWL_DEBUG_TX_REPLY("TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = "
4427                            "%d, scd_ssn = %d\n",
4428                            ba_resp->tid,
4429                            ba_resp->seq_ctl,
4430                            ba_resp->bitmap,
4431                            ba_resp->scd_flow,
4432                            ba_resp->scd_ssn);
4433         IWL_DEBUG_TX_REPLY("DAT start_idx = %d, bitmap = 0x%llx \n",
4434                            agg->start_idx,
4435                            agg->bitmap);
4436
4437         /* Update driver's record of ACK vs. not for each frame in window */
4438         iwl4965_tx_status_reply_compressed_ba(priv, agg, ba_resp);
4439
4440         /* Release all TFDs before the SSN, i.e. all TFDs in front of
4441          * block-ack window (we assume that they've been successfully
4442          * transmitted ... if not, it's too late anyway). */
4443         if (txq->q.read_ptr != (ba_resp_scd_ssn & 0xff)) {
4444                 int freed = iwl4965_tx_queue_reclaim(priv, scd_flow, index);
4445                 priv->stations[ba_resp->sta_id].
4446                         tid[ba_resp->tid].tfds_in_queue -= freed;
4447                 if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
4448                         priv->mac80211_registered &&
4449                         agg->state != IWL_EMPTYING_HW_QUEUE_DELBA)
4450                         ieee80211_wake_queue(priv->hw, scd_flow);
4451                 iwl4965_check_empty_hw_queue(priv, ba_resp->sta_id,
4452                         ba_resp->tid, scd_flow);
4453         }
4454 }
4455
4456 /**
4457  * iwl4965_tx_queue_set_q2ratid - Map unique receiver/tid combination to a queue
4458  */
4459 static int iwl4965_tx_queue_set_q2ratid(struct iwl4965_priv *priv, u16 ra_tid,
4460                                         u16 txq_id)
4461 {
4462         u32 tbl_dw_addr;
4463         u32 tbl_dw;
4464         u16 scd_q2ratid;
4465
4466         scd_q2ratid = ra_tid & SCD_QUEUE_RA_TID_MAP_RATID_MSK;
4467
4468         tbl_dw_addr = priv->scd_base_addr +
4469                         SCD_TRANSLATE_TBL_OFFSET_QUEUE(txq_id);
4470
4471         tbl_dw = iwl4965_read_targ_mem(priv, tbl_dw_addr);
4472
4473         if (txq_id & 0x1)
4474                 tbl_dw = (scd_q2ratid << 16) | (tbl_dw & 0x0000FFFF);
4475         else
4476                 tbl_dw = scd_q2ratid | (tbl_dw & 0xFFFF0000);
4477
4478         iwl4965_write_targ_mem(priv, tbl_dw_addr, tbl_dw);
4479
4480         return 0;
4481 }
4482
4483
4484 /**
4485  * iwl4965_tx_queue_agg_enable - Set up & enable aggregation for selected queue
4486  *
4487  * NOTE:  txq_id must be greater than IWL_BACK_QUEUE_FIRST_ID,
4488  *        i.e. it must be one of the higher queues used for aggregation
4489  */
4490 static int iwl4965_tx_queue_agg_enable(struct iwl4965_priv *priv, int txq_id,
4491                                        int tx_fifo, int sta_id, int tid,
4492                                        u16 ssn_idx)
4493 {
4494         unsigned long flags;
4495         int rc;
4496         u16 ra_tid;
4497
4498         if (IWL_BACK_QUEUE_FIRST_ID > txq_id)
4499                 IWL_WARNING("queue number too small: %d, must be > %d\n",
4500                         txq_id, IWL_BACK_QUEUE_FIRST_ID);
4501
4502         ra_tid = BUILD_RAxTID(sta_id, tid);
4503
4504         /* Modify device's station table to Tx this TID */
4505         iwl4965_sta_modify_enable_tid_tx(priv, sta_id, tid);
4506
4507         spin_lock_irqsave(&priv->lock, flags);
4508         rc = iwl4965_grab_nic_access(priv);
4509         if (rc) {
4510                 spin_unlock_irqrestore(&priv->lock, flags);
4511                 return rc;
4512         }
4513
4514         /* Stop this Tx queue before configuring it */
4515         iwl4965_tx_queue_stop_scheduler(priv, txq_id);
4516
4517         /* Map receiver-address / traffic-ID to this queue */
4518         iwl4965_tx_queue_set_q2ratid(priv, ra_tid, txq_id);
4519
4520         /* Set this queue as a chain-building queue */
4521         iwl4965_set_bits_prph(priv, KDR_SCD_QUEUECHAIN_SEL, (1 << txq_id));
4522
4523         /* Place first TFD at index corresponding to start sequence number.
4524          * Assumes that ssn_idx is valid (!= 0xFFF) */
4525         priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
4526         priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
4527         iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
4528
4529         /* Set up Tx window size and frame limit for this queue */
4530         iwl4965_write_targ_mem(priv,
4531                         priv->scd_base_addr + SCD_CONTEXT_QUEUE_OFFSET(txq_id),
4532                         (SCD_WIN_SIZE << SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
4533                         SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
4534
4535         iwl4965_write_targ_mem(priv, priv->scd_base_addr +
4536                         SCD_CONTEXT_QUEUE_OFFSET(txq_id) + sizeof(u32),
4537                         (SCD_FRAME_LIMIT << SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS)
4538                         & SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
4539
4540         iwl4965_set_bits_prph(priv, KDR_SCD_INTERRUPT_MASK, (1 << txq_id));
4541
4542         /* Set up Status area in SRAM, map to Tx DMA/FIFO, activate the queue */
4543         iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 1);
4544
4545         iwl4965_release_nic_access(priv);
4546         spin_unlock_irqrestore(&priv->lock, flags);
4547
4548         return 0;
4549 }
4550
4551 #endif /* CONFIG_IWL4965_HT */
4552
4553 /**
4554  * iwl4965_add_station - Initialize a station's hardware rate table
4555  *
4556  * The uCode's station table contains a table of fallback rates
4557  * for automatic fallback during transmission.
4558  *
4559  * NOTE: This sets up a default set of values.  These will be replaced later
4560  *       if the driver's iwl-4965-rs rate scaling algorithm is used, instead of
4561  *       rc80211_simple.
4562  *
4563  * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
4564  *       calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
4565  *       which requires station table entry to exist).
4566  */
4567 void iwl4965_add_station(struct iwl4965_priv *priv, const u8 *addr, int is_ap)
4568 {
4569         int i, r;
4570         struct iwl4965_link_quality_cmd link_cmd = {
4571                 .reserved1 = 0,
4572         };
4573         u16 rate_flags;
4574
4575         /* Set up the rate scaling to start at selected rate, fall back
4576          * all the way down to 1M in IEEE order, and then spin on 1M */
4577         if (is_ap)
4578                 r = IWL_RATE_54M_INDEX;
4579         else if (priv->phymode == MODE_IEEE80211A)
4580                 r = IWL_RATE_6M_INDEX;
4581         else
4582                 r = IWL_RATE_1M_INDEX;
4583
4584         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
4585                 rate_flags = 0;
4586                 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
4587                         rate_flags |= RATE_MCS_CCK_MSK;
4588
4589                 /* Use Tx antenna B only */
4590                 rate_flags |= RATE_MCS_ANT_B_MSK;
4591                 rate_flags &= ~RATE_MCS_ANT_A_MSK;
4592
4593                 link_cmd.rs_table[i].rate_n_flags =
4594                         iwl4965_hw_set_rate_n_flags(iwl4965_rates[r].plcp, rate_flags);
4595                 r = iwl4965_get_prev_ieee_rate(r);
4596         }
4597
4598         link_cmd.general_params.single_stream_ant_msk = 2;
4599         link_cmd.general_params.dual_stream_ant_msk = 3;
4600         link_cmd.agg_params.agg_dis_start_th = 3;
4601         link_cmd.agg_params.agg_time_limit = cpu_to_le16(4000);
4602
4603         /* Update the rate scaling for control frame Tx to AP */
4604         link_cmd.sta_id = is_ap ? IWL_AP_ID : IWL4965_BROADCAST_ID;
4605
4606         iwl4965_send_cmd_pdu(priv, REPLY_TX_LINK_QUALITY_CMD, sizeof(link_cmd),
4607                          &link_cmd);
4608 }
4609
4610 #ifdef CONFIG_IWL4965_HT
4611
4612 static u8 iwl4965_is_channel_extension(struct iwl4965_priv *priv, int phymode,
4613                                    u16 channel, u8 extension_chan_offset)
4614 {
4615         const struct iwl4965_channel_info *ch_info;
4616
4617         ch_info = iwl4965_get_channel_info(priv, phymode, channel);
4618         if (!is_channel_valid(ch_info))
4619                 return 0;
4620
4621         if (extension_chan_offset == IWL_EXT_CHANNEL_OFFSET_AUTO)
4622                 return 0;
4623
4624         if ((ch_info->fat_extension_channel == extension_chan_offset) ||
4625             (ch_info->fat_extension_channel == HT_IE_EXT_CHANNEL_MAX))
4626                 return 1;
4627
4628         return 0;
4629 }
4630
4631 static u8 iwl4965_is_fat_tx_allowed(struct iwl4965_priv *priv,
4632                                 struct ieee80211_ht_info *sta_ht_inf)
4633 {
4634         struct iwl_ht_info *iwl_ht_conf = &priv->current_ht_config;
4635
4636         if ((!iwl_ht_conf->is_ht) ||
4637            (iwl_ht_conf->supported_chan_width != IWL_CHANNEL_WIDTH_40MHZ) ||
4638            (iwl_ht_conf->extension_chan_offset == IWL_EXT_CHANNEL_OFFSET_AUTO))
4639                 return 0;
4640
4641         if (sta_ht_inf) {
4642                 if ((!sta_ht_inf->ht_supported) ||
4643                    (!sta_ht_inf->cap & IEEE80211_HT_CAP_SUP_WIDTH))
4644                         return 0;
4645         }
4646
4647         return (iwl4965_is_channel_extension(priv, priv->phymode,
4648                                          iwl_ht_conf->control_channel,
4649                                          iwl_ht_conf->extension_chan_offset));
4650 }
4651
4652 void iwl4965_set_rxon_ht(struct iwl4965_priv *priv, struct iwl_ht_info *ht_info)
4653 {
4654         struct iwl4965_rxon_cmd *rxon = &priv->staging_rxon;
4655         u32 val;
4656
4657         if (!ht_info->is_ht)
4658                 return;
4659
4660         /* Set up channel bandwidth:  20 MHz only, or 20/40 mixed if fat ok */
4661         if (iwl4965_is_fat_tx_allowed(priv, NULL))
4662                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED_MSK;
4663         else
4664                 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
4665                                  RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
4666
4667         if (le16_to_cpu(rxon->channel) != ht_info->control_channel) {
4668                 IWL_DEBUG_ASSOC("control diff than current %d %d\n",
4669                                 le16_to_cpu(rxon->channel),
4670                                 ht_info->control_channel);
4671                 rxon->channel = cpu_to_le16(ht_info->control_channel);
4672                 return;
4673         }
4674
4675         /* Note: control channel is opposite of extension channel */
4676         switch (ht_info->extension_chan_offset) {
4677         case IWL_EXT_CHANNEL_OFFSET_ABOVE:
4678                 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
4679                 break;
4680         case IWL_EXT_CHANNEL_OFFSET_BELOW:
4681                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
4682                 break;
4683         case IWL_EXT_CHANNEL_OFFSET_AUTO:
4684                 rxon->flags &= ~RXON_FLG_CHANNEL_MODE_MIXED_MSK;
4685                 break;
4686         default:
4687                 rxon->flags &= ~RXON_FLG_CHANNEL_MODE_MIXED_MSK;
4688                 break;
4689         }
4690
4691         val = ht_info->ht_protection;
4692
4693         rxon->flags |= cpu_to_le32(val << RXON_FLG_HT_OPERATING_MODE_POS);
4694
4695         iwl4965_set_rxon_chain(priv);
4696
4697         IWL_DEBUG_ASSOC("supported HT rate 0x%X %X "
4698                         "rxon flags 0x%X operation mode :0x%X "
4699                         "extension channel offset 0x%x "
4700                         "control chan %d\n",
4701                         ht_info->supp_mcs_set[0], ht_info->supp_mcs_set[1],
4702                         le32_to_cpu(rxon->flags), ht_info->ht_protection,
4703                         ht_info->extension_chan_offset,
4704                         ht_info->control_channel);
4705         return;
4706 }
4707
4708 void iwl4965_set_ht_add_station(struct iwl4965_priv *priv, u8 index,
4709                                 struct ieee80211_ht_info *sta_ht_inf)
4710 {
4711         __le32 sta_flags;
4712         u8 mimo_ps_mode;
4713
4714         if (!sta_ht_inf || !sta_ht_inf->ht_supported)
4715                 goto done;
4716
4717         mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2;
4718
4719         sta_flags = priv->stations[index].sta.station_flags;
4720
4721         sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
4722
4723         switch (mimo_ps_mode) {
4724         case WLAN_HT_CAP_MIMO_PS_STATIC:
4725                 sta_flags |= STA_FLG_MIMO_DIS_MSK;
4726                 break;
4727         case WLAN_HT_CAP_MIMO_PS_DYNAMIC:
4728                 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
4729                 break;
4730         case WLAN_HT_CAP_MIMO_PS_DISABLED:
4731                 break;
4732         default:
4733                 IWL_WARNING("Invalid MIMO PS mode %d", mimo_ps_mode);
4734                 break;
4735         }
4736
4737         sta_flags |= cpu_to_le32(
4738               (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
4739
4740         sta_flags |= cpu_to_le32(
4741               (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
4742
4743         if (iwl4965_is_fat_tx_allowed(priv, sta_ht_inf))
4744                 sta_flags |= STA_FLG_FAT_EN_MSK;
4745         else
4746                 sta_flags &= ~STA_FLG_FAT_EN_MSK;
4747
4748         priv->stations[index].sta.station_flags = sta_flags;
4749  done:
4750         return;
4751 }
4752
4753 static void iwl4965_sta_modify_add_ba_tid(struct iwl4965_priv *priv,
4754                                           int sta_id, int tid, u16 ssn)
4755 {
4756         unsigned long flags;
4757
4758         spin_lock_irqsave(&priv->sta_lock, flags);
4759         priv->stations[sta_id].sta.station_flags_msk = 0;
4760         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
4761         priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
4762         priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
4763         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
4764         spin_unlock_irqrestore(&priv->sta_lock, flags);
4765
4766         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
4767 }
4768
4769 static void iwl4965_sta_modify_del_ba_tid(struct iwl4965_priv *priv,
4770                                           int sta_id, int tid)
4771 {
4772         unsigned long flags;
4773
4774         spin_lock_irqsave(&priv->sta_lock, flags);
4775         priv->stations[sta_id].sta.station_flags_msk = 0;
4776         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
4777         priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
4778         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
4779         spin_unlock_irqrestore(&priv->sta_lock, flags);
4780
4781         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
4782 }
4783
4784 /*
4785  * Find first available (lowest unused) Tx Queue, mark it "active".
4786  * Called only when finding queue for aggregation.
4787  * Should never return anything < 7, because they should already
4788  * be in use as EDCA AC (0-3), Command (4), HCCA (5, 6).
4789  */
4790 static int iwl4965_txq_ctx_activate_free(struct iwl4965_priv *priv)
4791 {
4792         int txq_id;
4793
4794         for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++)
4795                 if (!test_and_set_bit(txq_id, &priv->txq_ctx_active_msk))
4796                         return txq_id;
4797         return -1;
4798 }
4799
4800 static int iwl4965_mac_ht_tx_agg_start(struct ieee80211_hw *hw, const u8 *da,
4801                                        u16 tid, u16 *start_seq_num)
4802 {
4803         struct iwl4965_priv *priv = hw->priv;
4804         int sta_id;
4805         int tx_fifo;
4806         int txq_id;
4807         int ssn = -1;
4808         int rc = 0;
4809         unsigned long flags;
4810         struct iwl4965_tid_data *tid_data;
4811         DECLARE_MAC_BUF(mac);
4812
4813         if (likely(tid < ARRAY_SIZE(default_tid_to_tx_fifo)))
4814                 tx_fifo = default_tid_to_tx_fifo[tid];
4815         else
4816                 return -EINVAL;
4817
4818         IWL_WARNING("%s on da = %s tid = %d\n",
4819                         __func__, print_mac(mac, da), tid);
4820
4821         sta_id = iwl4965_hw_find_station(priv, da);
4822         if (sta_id == IWL_INVALID_STATION)
4823                 return -ENXIO;
4824
4825         if (priv->stations[sta_id].tid[tid].agg.state != IWL_AGG_OFF) {
4826                 IWL_ERROR("Start AGG when state is not IWL_AGG_OFF !\n");
4827                 return -ENXIO;
4828         }
4829
4830         txq_id = iwl4965_txq_ctx_activate_free(priv);
4831         if (txq_id == -1)
4832                 return -ENXIO;
4833
4834         spin_lock_irqsave(&priv->sta_lock, flags);
4835         tid_data = &priv->stations[sta_id].tid[tid];
4836         ssn = SEQ_TO_SN(tid_data->seq_number);
4837         tid_data->agg.txq_id = txq_id;
4838         spin_unlock_irqrestore(&priv->sta_lock, flags);
4839
4840         *start_seq_num = ssn;
4841         rc = iwl4965_tx_queue_agg_enable(priv, txq_id, tx_fifo,
4842                                            sta_id, tid, ssn);
4843         if (rc)
4844                 return rc;
4845
4846         rc = 0;
4847         if (tid_data->tfds_in_queue == 0) {
4848                 printk(KERN_ERR "HW queue is empty\n");
4849                 tid_data->agg.state = IWL_AGG_ON;
4850                 ieee80211_start_tx_ba_cb_irqsafe(hw, da, tid);
4851         } else {
4852                 IWL_DEBUG_HT("HW queue is NOT empty: %d packets in HW queue\n",
4853                                 tid_data->tfds_in_queue);
4854                 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA;
4855         }
4856         return rc;
4857 }
4858
4859 static int iwl4965_mac_ht_tx_agg_stop(struct ieee80211_hw *hw, const u8 *da,
4860                                       u16 tid)
4861 {
4862
4863         struct iwl4965_priv *priv = hw->priv;
4864         int tx_fifo_id, txq_id, sta_id, ssn = -1;
4865         struct iwl4965_tid_data *tid_data;
4866         int rc, write_ptr, read_ptr;
4867         unsigned long flags;
4868         DECLARE_MAC_BUF(mac);
4869
4870         if (!da) {
4871                 IWL_ERROR("da = NULL\n");
4872                 return -EINVAL;
4873         }
4874
4875         if (likely(tid < ARRAY_SIZE(default_tid_to_tx_fifo)))
4876                 tx_fifo_id = default_tid_to_tx_fifo[tid];
4877         else
4878                 return -EINVAL;
4879
4880         sta_id = iwl4965_hw_find_station(priv, da);
4881
4882         if (sta_id == IWL_INVALID_STATION)
4883                 return -ENXIO;
4884
4885         if (priv->stations[sta_id].tid[tid].agg.state != IWL_AGG_ON)
4886                 IWL_WARNING("Stopping AGG while state not IWL_AGG_ON\n");
4887
4888         tid_data = &priv->stations[sta_id].tid[tid];
4889         ssn = (tid_data->seq_number & IEEE80211_SCTL_SEQ) >> 4;
4890         txq_id = tid_data->agg.txq_id;
4891         write_ptr = priv->txq[txq_id].q.write_ptr;
4892         read_ptr = priv->txq[txq_id].q.read_ptr;
4893
4894         /* The queue is not empty */
4895         if (write_ptr != read_ptr) {
4896                 IWL_DEBUG_HT("Stopping a non empty AGG HW QUEUE\n");
4897                 priv->stations[sta_id].tid[tid].agg.state =
4898                                 IWL_EMPTYING_HW_QUEUE_DELBA;
4899                 return 0;
4900         }
4901
4902         IWL_DEBUG_HT("HW queue empty\n");;
4903         priv->stations[sta_id].tid[tid].agg.state = IWL_AGG_OFF;
4904
4905         spin_lock_irqsave(&priv->lock, flags);
4906         rc = iwl4965_grab_nic_access(priv);
4907         if (rc) {
4908                 spin_unlock_irqrestore(&priv->lock, flags);
4909                 return rc;
4910         }
4911         rc = iwl4965_tx_queue_agg_disable(priv, txq_id, ssn, tx_fifo_id);
4912         iwl4965_release_nic_access(priv);
4913         spin_unlock_irqrestore(&priv->lock, flags);
4914
4915         if (rc)
4916                 return rc;
4917
4918         ieee80211_stop_tx_ba_cb_irqsafe(priv->hw, da, tid);
4919
4920         IWL_DEBUG_INFO("iwl4965_mac_ht_tx_agg_stop on da=%s tid=%d\n",
4921                         print_mac(mac, da), tid);
4922
4923         return 0;
4924 }
4925
4926 int iwl4965_mac_ampdu_action(struct ieee80211_hw *hw,
4927                              enum ieee80211_ampdu_mlme_action action,
4928                              const u8 *addr, u16 tid, u16 *ssn)
4929 {
4930         struct iwl4965_priv *priv = hw->priv;
4931         int sta_id;
4932         DECLARE_MAC_BUF(mac);
4933
4934         IWL_DEBUG_HT("A-MPDU action on da=%s tid=%d ",
4935                         print_mac(mac, addr), tid);
4936         sta_id = iwl4965_hw_find_station(priv, addr);
4937         switch (action) {
4938         case IEEE80211_AMPDU_RX_START:
4939                 IWL_DEBUG_HT("start Rx\n");
4940                 iwl4965_sta_modify_add_ba_tid(priv, sta_id, tid, *ssn);
4941                 break;
4942         case IEEE80211_AMPDU_RX_STOP:
4943                 IWL_DEBUG_HT("stop Rx\n");
4944                 iwl4965_sta_modify_del_ba_tid(priv, sta_id, tid);
4945                 break;
4946         case IEEE80211_AMPDU_TX_START:
4947                 IWL_DEBUG_HT("start Tx\n");
4948                 return iwl4965_mac_ht_tx_agg_start(hw, addr, tid, ssn);
4949         case IEEE80211_AMPDU_TX_STOP:
4950                 IWL_DEBUG_HT("stop Tx\n");
4951                 return iwl4965_mac_ht_tx_agg_stop(hw, addr, tid);
4952         default:
4953                 IWL_DEBUG_HT("unknown\n");
4954                 return -EINVAL;
4955                 break;
4956         }
4957         return 0;
4958 }
4959
4960 #endif /* CONFIG_IWL4965_HT */
4961
4962 /* Set up 4965-specific Rx frame reply handlers */
4963 void iwl4965_hw_rx_handler_setup(struct iwl4965_priv *priv)
4964 {
4965         /* Legacy Rx frames */
4966         priv->rx_handlers[REPLY_4965_RX] = iwl4965_rx_reply_rx;
4967
4968         /* High-throughput (HT) Rx frames */
4969         priv->rx_handlers[REPLY_RX_PHY_CMD] = iwl4965_rx_reply_rx_phy;
4970         priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwl4965_rx_reply_rx;
4971
4972         priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] =
4973             iwl4965_rx_missed_beacon_notif;
4974
4975 #ifdef CONFIG_IWL4965_HT
4976         priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl4965_rx_reply_compressed_ba;
4977 #endif /* CONFIG_IWL4965_HT */
4978 }
4979
4980 void iwl4965_hw_setup_deferred_work(struct iwl4965_priv *priv)
4981 {
4982         INIT_WORK(&priv->txpower_work, iwl4965_bg_txpower_work);
4983         INIT_WORK(&priv->statistics_work, iwl4965_bg_statistics_work);
4984 #ifdef CONFIG_IWL4965_SENSITIVITY
4985         INIT_WORK(&priv->sensitivity_work, iwl4965_bg_sensitivity_work);
4986 #endif
4987 #ifdef CONFIG_IWL4965_HT
4988 #ifdef CONFIG_IWL4965_HT_AGG
4989         INIT_WORK(&priv->agg_work, iwl4965_bg_agg_work);
4990 #endif /* CONFIG_IWL4965_HT_AGG */
4991 #endif /* CONFIG_IWL4965_HT */
4992         init_timer(&priv->statistics_periodic);
4993         priv->statistics_periodic.data = (unsigned long)priv;
4994         priv->statistics_periodic.function = iwl4965_bg_statistics_periodic;
4995 }
4996
4997 void iwl4965_hw_cancel_deferred_work(struct iwl4965_priv *priv)
4998 {
4999         del_timer_sync(&priv->statistics_periodic);
5000
5001         cancel_delayed_work(&priv->init_alive_start);
5002 }
5003
5004 struct pci_device_id iwl4965_hw_card_ids[] = {
5005         {PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x4229)},
5006         {PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x4230)},
5007         {0}
5008 };
5009
5010 /*
5011  * The device's EEPROM semaphore prevents conflicts between driver and uCode
5012  * when accessing the EEPROM; each access is a series of pulses to/from the
5013  * EEPROM chip, not a single event, so even reads could conflict if they
5014  * weren't arbitrated by the semaphore.
5015  */
5016 int iwl4965_eeprom_acquire_semaphore(struct iwl4965_priv *priv)
5017 {
5018         u16 count;
5019         int rc;
5020
5021         for (count = 0; count < EEPROM_SEM_RETRY_LIMIT; count++) {
5022                 /* Request semaphore */
5023                 iwl4965_set_bit(priv, CSR_HW_IF_CONFIG_REG,
5024                         CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM);
5025
5026                 /* See if we got it */
5027                 rc = iwl4965_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
5028                                         CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM,
5029                                         CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM,
5030                                         EEPROM_SEM_TIMEOUT);
5031                 if (rc >= 0) {
5032                         IWL_DEBUG_IO("Acquired semaphore after %d tries.\n",
5033                                 count+1);
5034                         return rc;
5035                 }
5036         }
5037
5038         return rc;
5039 }
5040
5041 MODULE_DEVICE_TABLE(pci, iwl4965_hw_card_ids);