Pileus Git - ~andy/linux/blob - drivers/net/wireless/iwlwifi/iwl-4965.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2007 Intel Corporation. All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of version 2 of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  17  *
  18  * The full GNU General Public License is included in this distribution in the
  19  * file called LICENSE.
  20  *
  21  * Contact Information:
  22  * James P. Ketrenos <ipw2100-admin@linux.intel.com>
  23  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  24  *
  25  *****************************************************************************/
  26
  27 #include <linux/kernel.h>
  28 #include <linux/module.h>
  29 #include <linux/version.h>
  30 #include <linux/init.h>
  31 #include <linux/pci.h>
  32 #include <linux/dma-mapping.h>
  33 #include <linux/delay.h>
  34 #include <linux/skbuff.h>
  35 #include <linux/netdevice.h>
  36 #include <linux/wireless.h>
  37 #include <net/mac80211.h>
  38 #include <linux/etherdevice.h>
  39 #include <asm/unaligned.h>
  40
  41 #include "iwl-4965.h"
  42 #include "iwl-helpers.h"
  43
  44 static void iwl4965_hw_card_show_info(struct iwl4965_priv *priv);
  45
  46 #define IWL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np)    \
  47         [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP,      \
  48                                     IWL_RATE_SISO_##s##M_PLCP, \
  49                                     IWL_RATE_MIMO_##s##M_PLCP, \
  50                                     IWL_RATE_##r##M_IEEE,      \
  51                                     IWL_RATE_##ip##M_INDEX,    \
  52                                     IWL_RATE_##in##M_INDEX,    \
  53                                     IWL_RATE_##rp##M_INDEX,    \
  54                                     IWL_RATE_##rn##M_INDEX,    \
  55                                     IWL_RATE_##pp##M_INDEX,    \
  56                                     IWL_RATE_##np##M_INDEX }
  57
  58 /*
  59  * Parameter order:
  60  *   rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate
  61  *
  62  * If there isn't a valid next or previous rate then INV is used which
  63  * maps to IWL_RATE_INVALID
  64  *
  65  */
  66 const struct iwl4965_rate_info iwl4965_rates[IWL_RATE_COUNT] = {
  67         IWL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2),    /*  1mbps */
  68         IWL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5),          /*  2mbps */
  69         IWL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11),        /*5.5mbps */
  70         IWL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18),      /* 11mbps */
  71         IWL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11),        /*  6mbps */
  72         IWL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11),       /*  9mbps */
  73         IWL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18),   /* 12mbps */
  74         IWL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24),   /* 18mbps */
  75         IWL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36),   /* 24mbps */
  76         IWL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48),   /* 36mbps */
  77         IWL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54),   /* 48mbps */
  78         IWL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */
  79         IWL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */
  80 };
  81
  82 #ifdef CONFIG_IWL4965_HT
  83
  84 static const u16 default_tid_to_tx_fifo[] = {
  85         IWL_TX_FIFO_AC1,
  86         IWL_TX_FIFO_AC0,
  87         IWL_TX_FIFO_AC0,
  88         IWL_TX_FIFO_AC1,
  89         IWL_TX_FIFO_AC2,
  90         IWL_TX_FIFO_AC2,
  91         IWL_TX_FIFO_AC3,
  92         IWL_TX_FIFO_AC3,
  93         IWL_TX_FIFO_NONE,
  94         IWL_TX_FIFO_NONE,
  95         IWL_TX_FIFO_NONE,
  96         IWL_TX_FIFO_NONE,
  97         IWL_TX_FIFO_NONE,
  98         IWL_TX_FIFO_NONE,
  99         IWL_TX_FIFO_NONE,
 100         IWL_TX_FIFO_NONE,
 101         IWL_TX_FIFO_AC3
 102 };
 103
 104 #endif  /*CONFIG_IWL4965_HT */
 105
 106 static int is_fat_channel(__le32 rxon_flags)
 107 {
 108         return (rxon_flags & RXON_FLG_CHANNEL_MODE_PURE_40_MSK) ||
 109                 (rxon_flags & RXON_FLG_CHANNEL_MODE_MIXED_MSK);
 110 }
 111
 112 static u8 is_single_stream(struct iwl4965_priv *priv)
 113 {
 114 #ifdef CONFIG_IWL4965_HT
 115         if (!priv->current_ht_config.is_ht ||
 116             (priv->current_ht_config.supp_mcs_set[1] == 0) ||
 117             (priv->ps_mode == IWL_MIMO_PS_STATIC))
 118                 return 1;
 119 #else
 120         return 1;
 121 #endif  /*CONFIG_IWL4965_HT */
 122         return 0;
 123 }
 124
 125 /*
 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,
 343                               enum ieee80211_band band, u16 channel,
 344                               const struct iwl4965_eeprom_channel *eeprom_ch,
 345                               u8 fat_extension_channel)
 346 {
 347         struct iwl4965_channel_info *ch_info;
 348
 349         ch_info = (struct iwl4965_channel_info *)
 350                         iwl4965_get_channel_info(priv, band, channel);
 351
 352         if (!is_channel_valid(ch_info))
 353                 return -1;
 354
 355         IWL_DEBUG_INFO("FAT Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x"
 356                         " %ddBm): Ad-Hoc %ssupported\n",
 357                         ch_info->channel,
 358                         is_channel_a_band(ch_info) ?
 359                         "5.2" : "2.4",
 360                         CHECK_AND_PRINT(IBSS),
 361                         CHECK_AND_PRINT(ACTIVE),
 362                         CHECK_AND_PRINT(RADAR),
 363                         CHECK_AND_PRINT(WIDE),
 364                         CHECK_AND_PRINT(NARROW),
 365                         CHECK_AND_PRINT(DFS),
 366                         eeprom_ch->flags,
 367                         eeprom_ch->max_power_avg,
 368                         ((eeprom_ch->flags & EEPROM_CHANNEL_IBSS)
 369                          && !(eeprom_ch->flags & EEPROM_CHANNEL_RADAR)) ?
 370                         "" : "not ");
 371
 372         ch_info->fat_eeprom = *eeprom_ch;
 373         ch_info->fat_max_power_avg = eeprom_ch->max_power_avg;
 374         ch_info->fat_curr_txpow = eeprom_ch->max_power_avg;
 375         ch_info->fat_min_power = 0;
 376         ch_info->fat_scan_power = eeprom_ch->max_power_avg;
 377         ch_info->fat_flags = eeprom_ch->flags;
 378         ch_info->fat_extension_channel = fat_extension_channel;
 379
 380         return 0;
 381 }
 382
 383 /**
 384  * iwl4965_kw_free - Free the "keep warm" buffer
 385  */
 386 static void iwl4965_kw_free(struct iwl4965_priv *priv)
 387 {
 388         struct pci_dev *dev = priv->pci_dev;
 389         struct iwl4965_kw *kw = &priv->kw;
 390
 391         if (kw->v_addr) {
 392                 pci_free_consistent(dev, kw->size, kw->v_addr, kw->dma_addr);
 393                 memset(kw, 0, sizeof(*kw));
 394         }
 395 }
 396
 397 /**
 398  * iwl4965_txq_ctx_reset - Reset TX queue context
 399  * Destroys all DMA structures and initialise them again
 400  *
 401  * @param priv
 402  * @return error code
 403  */
 404 static int iwl4965_txq_ctx_reset(struct iwl4965_priv *priv)
 405 {
 406         int rc = 0;
 407         int txq_id, slots_num;
 408         unsigned long flags;
 409
 410         iwl4965_kw_free(priv);
 411
 412         /* Free all tx/cmd queues and keep-warm buffer */
 413         iwl4965_hw_txq_ctx_free(priv);
 414
 415         /* Alloc keep-warm buffer */
 416         rc = iwl4965_kw_alloc(priv);
 417         if (rc) {
 418                 IWL_ERROR("Keep Warm allocation failed");
 419                 goto error_kw;
 420         }
 421
 422         spin_lock_irqsave(&priv->lock, flags);
 423
 424         rc = iwl4965_grab_nic_access(priv);
 425         if (unlikely(rc)) {
 426                 IWL_ERROR("TX reset failed");
 427                 spin_unlock_irqrestore(&priv->lock, flags);
 428                 goto error_reset;
 429         }
 430
 431         /* Turn off all Tx DMA channels */
 432         iwl4965_write_prph(priv, KDR_SCD_TXFACT, 0);
 433         iwl4965_release_nic_access(priv);
 434         spin_unlock_irqrestore(&priv->lock, flags);
 435
 436         /* Tell 4965 where to find the keep-warm buffer */
 437         rc = iwl4965_kw_init(priv);
 438         if (rc) {
 439                 IWL_ERROR("kw_init failed\n");
 440                 goto error_reset;
 441         }
 442
 443         /* Alloc and init all (default 16) Tx queues,
 444          * including the command queue (#4) */
 445         for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++) {
 446                 slots_num = (txq_id == IWL_CMD_QUEUE_NUM) ?
 447                                         TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS;
 448                 rc = iwl4965_tx_queue_init(priv, &priv->txq[txq_id], slots_num,
 449                                        txq_id);
 450                 if (rc) {
 451                         IWL_ERROR("Tx %d queue init failed\n", txq_id);
 452                         goto error;
 453                 }
 454         }
 455
 456         return rc;
 457
 458  error:
 459         iwl4965_hw_txq_ctx_free(priv);
 460  error_reset:
 461         iwl4965_kw_free(priv);
 462  error_kw:
 463         return rc;
 464 }
 465
 466 int iwl4965_hw_nic_init(struct iwl4965_priv *priv)
 467 {
 468         int rc;
 469         unsigned long flags;
 470         struct iwl4965_rx_queue *rxq = &priv->rxq;
 471         u8 rev_id;
 472         u32 val;
 473         u8 val_link;
 474
 475         iwl4965_power_init_handle(priv);
 476
 477         /* nic_init */
 478         spin_lock_irqsave(&priv->lock, flags);
 479
 480         iwl4965_set_bit(priv, CSR_GIO_CHICKEN_BITS,
 481                     CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
 482
 483         iwl4965_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 484         rc = iwl4965_poll_bit(priv, CSR_GP_CNTRL,
 485                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
 486                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
 487         if (rc < 0) {
 488                 spin_unlock_irqrestore(&priv->lock, flags);
 489                 IWL_DEBUG_INFO("Failed to init the card\n");
 490                 return rc;
 491         }
 492
 493         rc = iwl4965_grab_nic_access(priv);
 494         if (rc) {
 495                 spin_unlock_irqrestore(&priv->lock, flags);
 496                 return rc;
 497         }
 498
 499         iwl4965_read_prph(priv, APMG_CLK_CTRL_REG);
 500
 501         iwl4965_write_prph(priv, APMG_CLK_CTRL_REG,
 502                                  APMG_CLK_VAL_DMA_CLK_RQT |
 503                                  APMG_CLK_VAL_BSM_CLK_RQT);
 504         iwl4965_read_prph(priv, APMG_CLK_CTRL_REG);
 505
 506         udelay(20);
 507
 508         iwl4965_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
 509                                     APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
 510
 511         iwl4965_release_nic_access(priv);
 512         iwl4965_write32(priv, CSR_INT_COALESCING, 512 / 32);
 513         spin_unlock_irqrestore(&priv->lock, flags);
 514
 515         /* Determine HW type */
 516         rc = pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &rev_id);
 517         if (rc)
 518                 return rc;
 519
 520         IWL_DEBUG_INFO("HW Revision ID = 0x%X\n", rev_id);
 521
 522         iwl4965_nic_set_pwr_src(priv, 1);
 523         spin_lock_irqsave(&priv->lock, flags);
 524
 525         if ((rev_id & 0x80) == 0x80 && (rev_id & 0x7f) < 8) {
 526                 pci_read_config_dword(priv->pci_dev, PCI_REG_WUM8, &val);
 527                 /* Enable No Snoop field */
 528                 pci_write_config_dword(priv->pci_dev, PCI_REG_WUM8,
 529                                        val & ~(1 << 11));
 530         }
 531
 532         spin_unlock_irqrestore(&priv->lock, flags);
 533
 534         if (priv->eeprom.calib_version < EEPROM_TX_POWER_VERSION_NEW) {
 535                 IWL_ERROR("Older EEPROM detected!  Aborting.\n");
 536                 return -EINVAL;
 537         }
 538
 539         pci_read_config_byte(priv->pci_dev, PCI_LINK_CTRL, &val_link);
 540
 541         /* disable L1 entry -- workaround for pre-B1 */
 542         pci_write_config_byte(priv->pci_dev, PCI_LINK_CTRL, val_link & ~0x02);
 543
 544         spin_lock_irqsave(&priv->lock, flags);
 545
 546         /* set CSR_HW_CONFIG_REG for uCode use */
 547
 548         iwl4965_set_bit(priv, CSR_SW_VER, CSR_HW_IF_CONFIG_REG_BIT_KEDRON_R |
 549                     CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
 550                     CSR_HW_IF_CONFIG_REG_BIT_MAC_SI);
 551
 552         rc = iwl4965_grab_nic_access(priv);
 553         if (rc < 0) {
 554                 spin_unlock_irqrestore(&priv->lock, flags);
 555                 IWL_DEBUG_INFO("Failed to init the card\n");
 556                 return rc;
 557         }
 558
 559         iwl4965_read_prph(priv, APMG_PS_CTRL_REG);
 560         iwl4965_set_bits_prph(priv, APMG_PS_CTRL_REG,
 561                                     APMG_PS_CTRL_VAL_RESET_REQ);
 562         udelay(5);
 563         iwl4965_clear_bits_prph(priv, APMG_PS_CTRL_REG,
 564                                       APMG_PS_CTRL_VAL_RESET_REQ);
 565
 566         iwl4965_release_nic_access(priv);
 567         spin_unlock_irqrestore(&priv->lock, flags);
 568
 569         iwl4965_hw_card_show_info(priv);
 570
 571         /* end nic_init */
 572
 573         /* Allocate the RX queue, or reset if it is already allocated */
 574         if (!rxq->bd) {
 575                 rc = iwl4965_rx_queue_alloc(priv);
 576                 if (rc) {
 577                         IWL_ERROR("Unable to initialize Rx queue\n");
 578                         return -ENOMEM;
 579                 }
 580         } else
 581                 iwl4965_rx_queue_reset(priv, rxq);
 582
 583         iwl4965_rx_replenish(priv);
 584
 585         iwl4965_rx_init(priv, rxq);
 586
 587         spin_lock_irqsave(&priv->lock, flags);
 588
 589         rxq->need_update = 1;
 590         iwl4965_rx_queue_update_write_ptr(priv, rxq);
 591
 592         spin_unlock_irqrestore(&priv->lock, flags);
 593
 594         /* Allocate and init all Tx and Command queues */
 595         rc = iwl4965_txq_ctx_reset(priv);
 596         if (rc)
 597                 return rc;
 598
 599         if (priv->eeprom.sku_cap & EEPROM_SKU_CAP_SW_RF_KILL_ENABLE)
 600                 IWL_DEBUG_RF_KILL("SW RF KILL supported in EEPROM.\n");
 601
 602         if (priv->eeprom.sku_cap & EEPROM_SKU_CAP_HW_RF_KILL_ENABLE)
 603                 IWL_DEBUG_RF_KILL("HW RF KILL supported in EEPROM.\n");
 604
 605         set_bit(STATUS_INIT, &priv->status);
 606
 607         return 0;
 608 }
 609
 610 int iwl4965_hw_nic_stop_master(struct iwl4965_priv *priv)
 611 {
 612         int rc = 0;
 613         u32 reg_val;
 614         unsigned long flags;
 615
 616         spin_lock_irqsave(&priv->lock, flags);
 617
 618         /* set stop master bit */
 619         iwl4965_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
 620
 621         reg_val = iwl4965_read32(priv, CSR_GP_CNTRL);
 622
 623         if (CSR_GP_CNTRL_REG_FLAG_MAC_POWER_SAVE ==
 624             (reg_val & CSR_GP_CNTRL_REG_MSK_POWER_SAVE_TYPE))
 625                 IWL_DEBUG_INFO("Card in power save, master is already "
 626                                "stopped\n");
 627         else {
 628                 rc = iwl4965_poll_bit(priv, CSR_RESET,
 629                                   CSR_RESET_REG_FLAG_MASTER_DISABLED,
 630                                   CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
 631                 if (rc < 0) {
 632                         spin_unlock_irqrestore(&priv->lock, flags);
 633                         return rc;
 634                 }
 635         }
 636
 637         spin_unlock_irqrestore(&priv->lock, flags);
 638         IWL_DEBUG_INFO("stop master\n");
 639
 640         return rc;
 641 }
 642
 643 /**
 644  * iwl4965_hw_txq_ctx_stop - Stop all Tx DMA channels, free Tx queue memory
 645  */
 646 void iwl4965_hw_txq_ctx_stop(struct iwl4965_priv *priv)
 647 {
 648
 649         int txq_id;
 650         unsigned long flags;
 651
 652         /* Stop each Tx DMA channel, and wait for it to be idle */
 653         for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++) {
 654                 spin_lock_irqsave(&priv->lock, flags);
 655                 if (iwl4965_grab_nic_access(priv)) {
 656                         spin_unlock_irqrestore(&priv->lock, flags);
 657                         continue;
 658                 }
 659
 660                 iwl4965_write_direct32(priv,
 661                                      IWL_FH_TCSR_CHNL_TX_CONFIG_REG(txq_id),
 662                                      0x0);
 663                 iwl4965_poll_direct_bit(priv, IWL_FH_TSSR_TX_STATUS_REG,
 664                                         IWL_FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE
 665                                         (txq_id), 200);
 666                 iwl4965_release_nic_access(priv);
 667                 spin_unlock_irqrestore(&priv->lock, flags);
 668         }
 669
 670         /* Deallocate memory for all Tx queues */
 671         iwl4965_hw_txq_ctx_free(priv);
 672 }
 673
 674 int iwl4965_hw_nic_reset(struct iwl4965_priv *priv)
 675 {
 676         int rc = 0;
 677         unsigned long flags;
 678
 679         iwl4965_hw_nic_stop_master(priv);
 680
 681         spin_lock_irqsave(&priv->lock, flags);
 682
 683         iwl4965_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
 684
 685         udelay(10);
 686
 687         iwl4965_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 688         rc = iwl4965_poll_bit(priv, CSR_RESET,
 689                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
 690                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25);
 691
 692         udelay(10);
 693
 694         rc = iwl4965_grab_nic_access(priv);
 695         if (!rc) {
 696                 iwl4965_write_prph(priv, APMG_CLK_EN_REG,
 697                                          APMG_CLK_VAL_DMA_CLK_RQT |
 698                                          APMG_CLK_VAL_BSM_CLK_RQT);
 699
 700                 udelay(10);
 701
 702                 iwl4965_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
 703                                 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
 704
 705                 iwl4965_release_nic_access(priv);
 706         }
 707
 708         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
 709         wake_up_interruptible(&priv->wait_command_queue);
 710
 711         spin_unlock_irqrestore(&priv->lock, flags);
 712
 713         return rc;
 714
 715 }
 716
 717 #define REG_RECALIB_PERIOD (60)
 718
 719 /**
 720  * iwl4965_bg_statistics_periodic - Timer callback to queue statistics
 721  *
 722  * This callback is provided in order to queue the statistics_work
 723  * in work_queue context (v. softirq)
 724  *
 725  * This timer function is continually reset to execute within
 726  * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
 727  * was received.  We need to ensure we receive the statistics in order
 728  * to update the temperature used for calibrating the TXPOWER.  However,
 729  * we can't send the statistics command from softirq context (which
 730  * is the context which timers run at) so we have to queue off the
 731  * statistics_work to actually send the command to the hardware.
 732  */
 733 static void iwl4965_bg_statistics_periodic(unsigned long data)
 734 {
 735         struct iwl4965_priv *priv = (struct iwl4965_priv *)data;
 736
 737         queue_work(priv->workqueue, &priv->statistics_work);
 738 }
 739
 740 /**
 741  * iwl4965_bg_statistics_work - Send the statistics request to the hardware.
 742  *
 743  * This is queued by iwl4965_bg_statistics_periodic.
 744  */
 745 static void iwl4965_bg_statistics_work(struct work_struct *work)
 746 {
 747         struct iwl4965_priv *priv = container_of(work, struct iwl4965_priv,
 748                                              statistics_work);
 749
 750         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 751                 return;
 752
 753         mutex_lock(&priv->mutex);
 754         iwl4965_send_statistics_request(priv);
 755         mutex_unlock(&priv->mutex);
 756 }
 757
 758 #define CT_LIMIT_CONST          259
 759 #define TM_CT_KILL_THRESHOLD    110
 760
 761 void iwl4965_rf_kill_ct_config(struct iwl4965_priv *priv)
 762 {
 763         struct iwl4965_ct_kill_config cmd;
 764         u32 R1, R2, R3;
 765         u32 temp_th;
 766         u32 crit_temperature;
 767         unsigned long flags;
 768         int rc = 0;
 769
 770         spin_lock_irqsave(&priv->lock, flags);
 771         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_CLR,
 772                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
 773         spin_unlock_irqrestore(&priv->lock, flags);
 774
 775         if (priv->statistics.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK) {
 776                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[1]);
 777                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[1]);
 778                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[1]);
 779         } else {
 780                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[0]);
 781                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[0]);
 782                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[0]);
 783         }
 784
 785         temp_th = CELSIUS_TO_KELVIN(TM_CT_KILL_THRESHOLD);
 786
 787         crit_temperature = ((temp_th * (R3-R1))/CT_LIMIT_CONST) + R2;
 788         cmd.critical_temperature_R =  cpu_to_le32(crit_temperature);
 789         rc = iwl4965_send_cmd_pdu(priv,
 790                               REPLY_CT_KILL_CONFIG_CMD, sizeof(cmd), &cmd);
 791         if (rc)
 792                 IWL_ERROR("REPLY_CT_KILL_CONFIG_CMD failed\n");
 793         else
 794                 IWL_DEBUG_INFO("REPLY_CT_KILL_CONFIG_CMD succeeded\n");
 795 }
 796
 797 #ifdef CONFIG_IWL4965_SENSITIVITY
 798
 799 /* "false alarms" are signals that our DSP tries to lock onto,
 800  *   but then determines that they are either noise, or transmissions
 801  *   from a distant wireless network (also "noise", really) that get
 802  *   "stepped on" by stronger transmissions within our own network.
 803  * This algorithm attempts to set a sensitivity level that is high
 804  *   enough to receive all of our own network traffic, but not so
 805  *   high that our DSP gets too busy trying to lock onto non-network
 806  *   activity/noise. */
 807 static int iwl4965_sens_energy_cck(struct iwl4965_priv *priv,
 808                                    u32 norm_fa,
 809                                    u32 rx_enable_time,
 810                                    struct statistics_general_data *rx_info)
 811 {
 812         u32 max_nrg_cck = 0;
 813         int i = 0;
 814         u8 max_silence_rssi = 0;
 815         u32 silence_ref = 0;
 816         u8 silence_rssi_a = 0;
 817         u8 silence_rssi_b = 0;
 818         u8 silence_rssi_c = 0;
 819         u32 val;
 820
 821         /* "false_alarms" values below are cross-multiplications to assess the
 822          *   numbers of false alarms within the measured period of actual Rx
 823          *   (Rx is off when we're txing), vs the min/max expected false alarms
 824          *   (some should be expected if rx is sensitive enough) in a
 825          *   hypothetical listening period of 200 time units (TU), 204.8 msec:
 826          *
 827          * MIN_FA/fixed-time < false_alarms/actual-rx-time < MAX_FA/beacon-time
 828          *
 829          * */
 830         u32 false_alarms = norm_fa * 200 * 1024;
 831         u32 max_false_alarms = MAX_FA_CCK * rx_enable_time;
 832         u32 min_false_alarms = MIN_FA_CCK * rx_enable_time;
 833         struct iwl4965_sensitivity_data *data = NULL;
 834
 835         data = &(priv->sensitivity_data);
 836
 837         data->nrg_auto_corr_silence_diff = 0;
 838
 839         /* Find max silence rssi among all 3 receivers.
 840          * This is background noise, which may include transmissions from other
 841          *    networks, measured during silence before our network's beacon */
 842         silence_rssi_a = (u8)((rx_info->beacon_silence_rssi_a &
 843                             ALL_BAND_FILTER) >> 8);
 844         silence_rssi_b = (u8)((rx_info->beacon_silence_rssi_b &
 845                             ALL_BAND_FILTER) >> 8);
 846         silence_rssi_c = (u8)((rx_info->beacon_silence_rssi_c &
 847                             ALL_BAND_FILTER) >> 8);
 848
 849         val = max(silence_rssi_b, silence_rssi_c);
 850         max_silence_rssi = max(silence_rssi_a, (u8) val);
 851
 852         /* Store silence rssi in 20-beacon history table */
 853         data->nrg_silence_rssi[data->nrg_silence_idx] = max_silence_rssi;
 854         data->nrg_silence_idx++;
 855         if (data->nrg_silence_idx >= NRG_NUM_PREV_STAT_L)
 856                 data->nrg_silence_idx = 0;
 857
 858         /* Find max silence rssi across 20 beacon history */
 859         for (i = 0; i < NRG_NUM_PREV_STAT_L; i++) {
 860                 val = data->nrg_silence_rssi[i];
 861                 silence_ref = max(silence_ref, val);
 862         }
 863         IWL_DEBUG_CALIB("silence a %u, b %u, c %u, 20-bcn max %u\n",
 864                         silence_rssi_a, silence_rssi_b, silence_rssi_c,
 865                         silence_ref);
 866
 867         /* Find max rx energy (min value!) among all 3 receivers,
 868          *   measured during beacon frame.
 869          * Save it in 10-beacon history table. */
 870         i = data->nrg_energy_idx;
 871         val = min(rx_info->beacon_energy_b, rx_info->beacon_energy_c);
 872         data->nrg_value[i] = min(rx_info->beacon_energy_a, val);
 873
 874         data->nrg_energy_idx++;
 875         if (data->nrg_energy_idx >= 10)
 876                 data->nrg_energy_idx = 0;
 877
 878         /* Find min rx energy (max value) across 10 beacon history.
 879          * This is the minimum signal level that we want to receive well.
 880          * Add backoff (margin so we don't miss slightly lower energy frames).
 881          * This establishes an upper bound (min value) for energy threshold. */
 882         max_nrg_cck = data->nrg_value[0];
 883         for (i = 1; i < 10; i++)
 884                 max_nrg_cck = (u32) max(max_nrg_cck, (data->nrg_value[i]));
 885         max_nrg_cck += 6;
 886
 887         IWL_DEBUG_CALIB("rx energy a %u, b %u, c %u, 10-bcn max/min %u\n",
 888                         rx_info->beacon_energy_a, rx_info->beacon_energy_b,
 889                         rx_info->beacon_energy_c, max_nrg_cck - 6);
 890
 891         /* Count number of consecutive beacons with fewer-than-desired
 892          *   false alarms. */
 893         if (false_alarms < min_false_alarms)
 894                 data->num_in_cck_no_fa++;
 895         else
 896                 data->num_in_cck_no_fa = 0;
 897         IWL_DEBUG_CALIB("consecutive bcns with few false alarms = %u\n",
 898                         data->num_in_cck_no_fa);
 899
 900         /* If we got too many false alarms this time, reduce sensitivity */
 901         if (false_alarms > max_false_alarms) {
 902                 IWL_DEBUG_CALIB("norm FA %u > max FA %u\n",
 903                              false_alarms, max_false_alarms);
 904                 IWL_DEBUG_CALIB("... reducing sensitivity\n");
 905                 data->nrg_curr_state = IWL_FA_TOO_MANY;
 906
 907                 if (data->auto_corr_cck > AUTO_CORR_MAX_TH_CCK) {
 908                         /* Store for "fewer than desired" on later beacon */
 909                         data->nrg_silence_ref = silence_ref;
 910
 911                         /* increase energy threshold (reduce nrg value)
 912                          *   to decrease sensitivity */
 913                         if (data->nrg_th_cck > (NRG_MAX_CCK + NRG_STEP_CCK))
 914                                 data->nrg_th_cck = data->nrg_th_cck
 915                                                          - NRG_STEP_CCK;
 916                 }
 917
 918                 /* increase auto_corr values to decrease sensitivity */
 919                 if (data->auto_corr_cck < AUTO_CORR_MAX_TH_CCK)
 920                         data->auto_corr_cck = AUTO_CORR_MAX_TH_CCK + 1;
 921                 else {
 922                         val = data->auto_corr_cck + AUTO_CORR_STEP_CCK;
 923                         data->auto_corr_cck = min((u32)AUTO_CORR_MAX_CCK, val);
 924                 }
 925                 val = data->auto_corr_cck_mrc + AUTO_CORR_STEP_CCK;
 926                 data->auto_corr_cck_mrc = min((u32)AUTO_CORR_MAX_CCK_MRC, val);
 927
 928         /* Else if we got fewer than desired, increase sensitivity */
 929         } else if (false_alarms < min_false_alarms) {
 930                 data->nrg_curr_state = IWL_FA_TOO_FEW;
 931
 932                 /* Compare silence level with silence level for most recent
 933                  *   healthy number or too many false alarms */
 934                 data->nrg_auto_corr_silence_diff = (s32)data->nrg_silence_ref -
 935                                                    (s32)silence_ref;
 936
 937                 IWL_DEBUG_CALIB("norm FA %u < min FA %u, silence diff %d\n",
 938                          false_alarms, min_false_alarms,
 939                          data->nrg_auto_corr_silence_diff);
 940
 941                 /* Increase value to increase sensitivity, but only if:
 942                  * 1a) previous beacon did *not* have *too many* false alarms
 943                  * 1b) AND there's a significant difference in Rx levels
 944                  *      from a previous beacon with too many, or healthy # FAs
 945                  * OR 2) We've seen a lot of beacons (100) with too few
 946                  *       false alarms */
 947                 if ((data->nrg_prev_state != IWL_FA_TOO_MANY) &&
 948                         ((data->nrg_auto_corr_silence_diff > NRG_DIFF) ||
 949                         (data->num_in_cck_no_fa > MAX_NUMBER_CCK_NO_FA))) {
 950
 951                         IWL_DEBUG_CALIB("... increasing sensitivity\n");
 952                         /* Increase nrg value to increase sensitivity */
 953                         val = data->nrg_th_cck + NRG_STEP_CCK;
 954                         data->nrg_th_cck = min((u32)NRG_MIN_CCK, val);
 955
 956                         /* Decrease auto_corr values to increase sensitivity */
 957                         val = data->auto_corr_cck - AUTO_CORR_STEP_CCK;
 958                         data->auto_corr_cck = max((u32)AUTO_CORR_MIN_CCK, val);
 959
 960                         val = data->auto_corr_cck_mrc - AUTO_CORR_STEP_CCK;
 961                         data->auto_corr_cck_mrc =
 962                                          max((u32)AUTO_CORR_MIN_CCK_MRC, val);
 963
 964                 } else
 965                         IWL_DEBUG_CALIB("... but not changing sensitivity\n");
 966
 967         /* Else we got a healthy number of false alarms, keep status quo */
 968         } else {
 969                 IWL_DEBUG_CALIB(" FA in safe zone\n");
 970                 data->nrg_curr_state = IWL_FA_GOOD_RANGE;
 971
 972                 /* Store for use in "fewer than desired" with later beacon */
 973                 data->nrg_silence_ref = silence_ref;
 974
 975                 /* If previous beacon had too many false alarms,
 976                  *   give it some extra margin by reducing sensitivity again
 977                  *   (but don't go below measured energy of desired Rx) */
 978                 if (IWL_FA_TOO_MANY == data->nrg_prev_state) {
 979                         IWL_DEBUG_CALIB("... increasing margin\n");
 980                         data->nrg_th_cck -= NRG_MARGIN;
 981                 }
 982         }
 983
 984         /* Make sure the energy threshold does not go above the measured
 985          * energy of the desired Rx signals (reduced by backoff margin),
 986          * or else we might start missing Rx frames.
 987          * Lower value is higher energy, so we use max()!
 988          */
 989         data->nrg_th_cck = max(max_nrg_cck, data->nrg_th_cck);
 990         IWL_DEBUG_CALIB("new nrg_th_cck %u\n", data->nrg_th_cck);
 991
 992         data->nrg_prev_state = data->nrg_curr_state;
 993
 994         return 0;
 995 }
 996
 997
 998 static int iwl4965_sens_auto_corr_ofdm(struct iwl4965_priv *priv,
 999                                        u32 norm_fa,
1000                                        u32 rx_enable_time)
1001 {
1002         u32 val;
1003         u32 false_alarms = norm_fa * 200 * 1024;
1004         u32 max_false_alarms = MAX_FA_OFDM * rx_enable_time;
1005         u32 min_false_alarms = MIN_FA_OFDM * rx_enable_time;
1006         struct iwl4965_sensitivity_data *data = NULL;
1007
1008         data = &(priv->sensitivity_data);
1009
1010         /* If we got too many false alarms this time, reduce sensitivity */
1011         if (false_alarms > max_false_alarms) {
1012
1013                 IWL_DEBUG_CALIB("norm FA %u > max FA %u)\n",
1014                              false_alarms, max_false_alarms);
1015
1016                 val = data->auto_corr_ofdm + AUTO_CORR_STEP_OFDM;
1017                 data->auto_corr_ofdm =
1018                                 min((u32)AUTO_CORR_MAX_OFDM, val);
1019
1020                 val = data->auto_corr_ofdm_mrc + AUTO_CORR_STEP_OFDM;
1021                 data->auto_corr_ofdm_mrc =
1022                                 min((u32)AUTO_CORR_MAX_OFDM_MRC, val);
1023
1024                 val = data->auto_corr_ofdm_x1 + AUTO_CORR_STEP_OFDM;
1025                 data->auto_corr_ofdm_x1 =
1026                                 min((u32)AUTO_CORR_MAX_OFDM_X1, val);
1027
1028                 val = data->auto_corr_ofdm_mrc_x1 + AUTO_CORR_STEP_OFDM;
1029                 data->auto_corr_ofdm_mrc_x1 =
1030                                 min((u32)AUTO_CORR_MAX_OFDM_MRC_X1, val);
1031         }
1032
1033         /* Else if we got fewer than desired, increase sensitivity */
1034         else if (false_alarms < min_false_alarms) {
1035
1036                 IWL_DEBUG_CALIB("norm FA %u < min FA %u\n",
1037                              false_alarms, min_false_alarms);
1038
1039                 val = data->auto_corr_ofdm - AUTO_CORR_STEP_OFDM;
1040                 data->auto_corr_ofdm =
1041                                 max((u32)AUTO_CORR_MIN_OFDM, val);
1042
1043                 val = data->auto_corr_ofdm_mrc - AUTO_CORR_STEP_OFDM;
1044                 data->auto_corr_ofdm_mrc =
1045                                 max((u32)AUTO_CORR_MIN_OFDM_MRC, val);
1046
1047                 val = data->auto_corr_ofdm_x1 - AUTO_CORR_STEP_OFDM;
1048                 data->auto_corr_ofdm_x1 =
1049                                 max((u32)AUTO_CORR_MIN_OFDM_X1, val);
1050
1051                 val = data->auto_corr_ofdm_mrc_x1 - AUTO_CORR_STEP_OFDM;
1052                 data->auto_corr_ofdm_mrc_x1 =
1053                                 max((u32)AUTO_CORR_MIN_OFDM_MRC_X1, val);
1054         }
1055
1056         else
1057                 IWL_DEBUG_CALIB("min FA %u < norm FA %u < max FA %u OK\n",
1058                          min_false_alarms, false_alarms, max_false_alarms);
1059
1060         return 0;
1061 }
1062
1063 static int iwl4965_sensitivity_callback(struct iwl4965_priv *priv,
1064                                     struct iwl4965_cmd *cmd, struct sk_buff *skb)
1065 {
1066         /* We didn't cache the SKB; let the caller free it */
1067         return 1;
1068 }
1069
1070 /* Prepare a SENSITIVITY_CMD, send to uCode if values have changed */
1071 static int iwl4965_sensitivity_write(struct iwl4965_priv *priv, u8 flags)
1072 {
1073         int rc = 0;
1074         struct iwl4965_sensitivity_cmd cmd ;
1075         struct iwl4965_sensitivity_data *data = NULL;
1076         struct iwl4965_host_cmd cmd_out = {
1077                 .id = SENSITIVITY_CMD,
1078                 .len = sizeof(struct iwl4965_sensitivity_cmd),
1079                 .meta.flags = flags,
1080                 .data = &cmd,
1081         };
1082
1083         data = &(priv->sensitivity_data);
1084
1085         memset(&cmd, 0, sizeof(cmd));
1086
1087         cmd.table[HD_AUTO_CORR32_X4_TH_ADD_MIN_INDEX] =
1088                                 cpu_to_le16((u16)data->auto_corr_ofdm);
1089         cmd.table[HD_AUTO_CORR32_X4_TH_ADD_MIN_MRC_INDEX] =
1090                                 cpu_to_le16((u16)data->auto_corr_ofdm_mrc);
1091         cmd.table[HD_AUTO_CORR32_X1_TH_ADD_MIN_INDEX] =
1092                                 cpu_to_le16((u16)data->auto_corr_ofdm_x1);
1093         cmd.table[HD_AUTO_CORR32_X1_TH_ADD_MIN_MRC_INDEX] =
1094                                 cpu_to_le16((u16)data->auto_corr_ofdm_mrc_x1);
1095
1096         cmd.table[HD_AUTO_CORR40_X4_TH_ADD_MIN_INDEX] =
1097                                 cpu_to_le16((u16)data->auto_corr_cck);
1098         cmd.table[HD_AUTO_CORR40_X4_TH_ADD_MIN_MRC_INDEX] =
1099                                 cpu_to_le16((u16)data->auto_corr_cck_mrc);
1100
1101         cmd.table[HD_MIN_ENERGY_CCK_DET_INDEX] =
1102                                 cpu_to_le16((u16)data->nrg_th_cck);
1103         cmd.table[HD_MIN_ENERGY_OFDM_DET_INDEX] =
1104                                 cpu_to_le16((u16)data->nrg_th_ofdm);
1105
1106         cmd.table[HD_BARKER_CORR_TH_ADD_MIN_INDEX] =
1107                                 __constant_cpu_to_le16(190);
1108         cmd.table[HD_BARKER_CORR_TH_ADD_MIN_MRC_INDEX] =
1109                                 __constant_cpu_to_le16(390);
1110         cmd.table[HD_OFDM_ENERGY_TH_IN_INDEX] =
1111                                 __constant_cpu_to_le16(62);
1112
1113         IWL_DEBUG_CALIB("ofdm: ac %u mrc %u x1 %u mrc_x1 %u thresh %u\n",
1114                         data->auto_corr_ofdm, data->auto_corr_ofdm_mrc,
1115                         data->auto_corr_ofdm_x1, data->auto_corr_ofdm_mrc_x1,
1116                         data->nrg_th_ofdm);
1117
1118         IWL_DEBUG_CALIB("cck: ac %u mrc %u thresh %u\n",
1119                         data->auto_corr_cck, data->auto_corr_cck_mrc,
1120                         data->nrg_th_cck);
1121
1122         /* Update uCode's "work" table, and copy it to DSP */
1123         cmd.control = SENSITIVITY_CMD_CONTROL_WORK_TABLE;
1124
1125         if (flags & CMD_ASYNC)
1126                 cmd_out.meta.u.callback = iwl4965_sensitivity_callback;
1127
1128         /* Don't send command to uCode if nothing has changed */
1129         if (!memcmp(&cmd.table[0], &(priv->sensitivity_tbl[0]),
1130                     sizeof(u16)*HD_TABLE_SIZE)) {
1131                 IWL_DEBUG_CALIB("No change in SENSITIVITY_CMD\n");
1132                 return 0;
1133         }
1134
1135         /* Copy table for comparison next time */
1136         memcpy(&(priv->sensitivity_tbl[0]), &(cmd.table[0]),
1137                sizeof(u16)*HD_TABLE_SIZE);
1138
1139         rc = iwl4965_send_cmd(priv, &cmd_out);
1140         if (!rc) {
1141                 IWL_DEBUG_CALIB("SENSITIVITY_CMD succeeded\n");
1142                 return rc;
1143         }
1144
1145         return 0;
1146 }
1147
1148 void iwl4965_init_sensitivity(struct iwl4965_priv *priv, u8 flags, u8 force)
1149 {
1150         int rc = 0;
1151         int i;
1152         struct iwl4965_sensitivity_data *data = NULL;
1153
1154         IWL_DEBUG_CALIB("Start iwl4965_init_sensitivity\n");
1155
1156         if (force)
1157                 memset(&(priv->sensitivity_tbl[0]), 0,
1158                         sizeof(u16)*HD_TABLE_SIZE);
1159
1160         /* Clear driver's sensitivity algo data */
1161         data = &(priv->sensitivity_data);
1162         memset(data, 0, sizeof(struct iwl4965_sensitivity_data));
1163
1164         data->num_in_cck_no_fa = 0;
1165         data->nrg_curr_state = IWL_FA_TOO_MANY;
1166         data->nrg_prev_state = IWL_FA_TOO_MANY;
1167         data->nrg_silence_ref = 0;
1168         data->nrg_silence_idx = 0;
1169         data->nrg_energy_idx = 0;
1170
1171         for (i = 0; i < 10; i++)
1172                 data->nrg_value[i] = 0;
1173
1174         for (i = 0; i < NRG_NUM_PREV_STAT_L; i++)
1175                 data->nrg_silence_rssi[i] = 0;
1176
1177         data->auto_corr_ofdm = 90;
1178         data->auto_corr_ofdm_mrc = 170;
1179         data->auto_corr_ofdm_x1  = 105;
1180         data->auto_corr_ofdm_mrc_x1 = 220;
1181         data->auto_corr_cck = AUTO_CORR_CCK_MIN_VAL_DEF;
1182         data->auto_corr_cck_mrc = 200;
1183         data->nrg_th_cck = 100;
1184         data->nrg_th_ofdm = 100;
1185
1186         data->last_bad_plcp_cnt_ofdm = 0;
1187         data->last_fa_cnt_ofdm = 0;
1188         data->last_bad_plcp_cnt_cck = 0;
1189         data->last_fa_cnt_cck = 0;
1190
1191         /* Clear prior Sensitivity command data to force send to uCode */
1192         if (force)
1193                 memset(&(priv->sensitivity_tbl[0]), 0,
1194                     sizeof(u16)*HD_TABLE_SIZE);
1195
1196         rc |= iwl4965_sensitivity_write(priv, flags);
1197         IWL_DEBUG_CALIB("<<return 0x%X\n", rc);
1198
1199         return;
1200 }
1201
1202
1203 /* Reset differential Rx gains in NIC to prepare for chain noise calibration.
1204  * Called after every association, but this runs only once!
1205  *  ... once chain noise is calibrated the first time, it's good forever.  */
1206 void iwl4965_chain_noise_reset(struct iwl4965_priv *priv)
1207 {
1208         struct iwl4965_chain_noise_data *data = NULL;
1209         int rc = 0;
1210
1211         data = &(priv->chain_noise_data);
1212         if ((data->state == IWL_CHAIN_NOISE_ALIVE) && iwl4965_is_associated(priv)) {
1213                 struct iwl4965_calibration_cmd cmd;
1214
1215                 memset(&cmd, 0, sizeof(cmd));
1216                 cmd.opCode = PHY_CALIBRATE_DIFF_GAIN_CMD;
1217                 cmd.diff_gain_a = 0;
1218                 cmd.diff_gain_b = 0;
1219                 cmd.diff_gain_c = 0;
1220                 rc = iwl4965_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
1221                                  sizeof(cmd), &cmd);
1222                 msleep(4);
1223                 data->state = IWL_CHAIN_NOISE_ACCUMULATE;
1224                 IWL_DEBUG_CALIB("Run chain_noise_calibrate\n");
1225         }
1226         return;
1227 }
1228
1229 /*
1230  * Accumulate 20 beacons of signal and noise statistics for each of
1231  *   3 receivers/antennas/rx-chains, then figure out:
1232  * 1)  Which antennas are connected.
1233  * 2)  Differential rx gain settings to balance the 3 receivers.
1234  */
1235 static void iwl4965_noise_calibration(struct iwl4965_priv *priv,
1236                                       struct iwl4965_notif_statistics *stat_resp)
1237 {
1238         struct iwl4965_chain_noise_data *data = NULL;
1239         int rc = 0;
1240
1241         u32 chain_noise_a;
1242         u32 chain_noise_b;
1243         u32 chain_noise_c;
1244         u32 chain_sig_a;
1245         u32 chain_sig_b;
1246         u32 chain_sig_c;
1247         u32 average_sig[NUM_RX_CHAINS] = {INITIALIZATION_VALUE};
1248         u32 average_noise[NUM_RX_CHAINS] = {INITIALIZATION_VALUE};
1249         u32 max_average_sig;
1250         u16 max_average_sig_antenna_i;
1251         u32 min_average_noise = MIN_AVERAGE_NOISE_MAX_VALUE;
1252         u16 min_average_noise_antenna_i = INITIALIZATION_VALUE;
1253         u16 i = 0;
1254         u16 chan_num = INITIALIZATION_VALUE;
1255         u32 band = INITIALIZATION_VALUE;
1256         u32 active_chains = 0;
1257         unsigned long flags;
1258         struct statistics_rx_non_phy *rx_info = &(stat_resp->rx.general);
1259
1260         data = &(priv->chain_noise_data);
1261
1262         /* Accumulate just the first 20 beacons after the first association,
1263          *   then we're done forever. */
1264         if (data->state != IWL_CHAIN_NOISE_ACCUMULATE) {
1265                 if (data->state == IWL_CHAIN_NOISE_ALIVE)
1266                         IWL_DEBUG_CALIB("Wait for noise calib reset\n");
1267                 return;
1268         }
1269
1270         spin_lock_irqsave(&priv->lock, flags);
1271         if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) {
1272                 IWL_DEBUG_CALIB(" << Interference data unavailable\n");
1273                 spin_unlock_irqrestore(&priv->lock, flags);
1274                 return;
1275         }
1276
1277         band = (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) ? 0 : 1;
1278         chan_num = le16_to_cpu(priv->staging_rxon.channel);
1279
1280         /* Make sure we accumulate data for just the associated channel
1281          *   (even if scanning). */
1282         if ((chan_num != (le32_to_cpu(stat_resp->flag) >> 16)) ||
1283             ((STATISTICS_REPLY_FLG_BAND_24G_MSK ==
1284              (stat_resp->flag & STATISTICS_REPLY_FLG_BAND_24G_MSK)) && band)) {
1285                 IWL_DEBUG_CALIB("Stats not from chan=%d, band=%d\n",
1286                                 chan_num, band);
1287                 spin_unlock_irqrestore(&priv->lock, flags);
1288                 return;
1289         }
1290
1291         /* Accumulate beacon statistics values across 20 beacons */
1292         chain_noise_a = le32_to_cpu(rx_info->beacon_silence_rssi_a) &
1293                                 IN_BAND_FILTER;
1294         chain_noise_b = le32_to_cpu(rx_info->beacon_silence_rssi_b) &
1295                                 IN_BAND_FILTER;
1296         chain_noise_c = le32_to_cpu(rx_info->beacon_silence_rssi_c) &
1297                                 IN_BAND_FILTER;
1298
1299         chain_sig_a = le32_to_cpu(rx_info->beacon_rssi_a) & IN_BAND_FILTER;
1300         chain_sig_b = le32_to_cpu(rx_info->beacon_rssi_b) & IN_BAND_FILTER;
1301         chain_sig_c = le32_to_cpu(rx_info->beacon_rssi_c) & IN_BAND_FILTER;
1302
1303         spin_unlock_irqrestore(&priv->lock, flags);
1304
1305         data->beacon_count++;
1306
1307         data->chain_noise_a = (chain_noise_a + data->chain_noise_a);
1308         data->chain_noise_b = (chain_noise_b + data->chain_noise_b);
1309         data->chain_noise_c = (chain_noise_c + data->chain_noise_c);
1310
1311         data->chain_signal_a = (chain_sig_a + data->chain_signal_a);
1312         data->chain_signal_b = (chain_sig_b + data->chain_signal_b);
1313         data->chain_signal_c = (chain_sig_c + data->chain_signal_c);
1314
1315         IWL_DEBUG_CALIB("chan=%d, band=%d, beacon=%d\n", chan_num, band,
1316                         data->beacon_count);
1317         IWL_DEBUG_CALIB("chain_sig: a %d b %d c %d\n",
1318                         chain_sig_a, chain_sig_b, chain_sig_c);
1319         IWL_DEBUG_CALIB("chain_noise: a %d b %d c %d\n",
1320                         chain_noise_a, chain_noise_b, chain_noise_c);
1321
1322         /* If this is the 20th beacon, determine:
1323          * 1)  Disconnected antennas (using signal strengths)
1324          * 2)  Differential gain (using silence noise) to balance receivers */
1325         if (data->beacon_count == CAL_NUM_OF_BEACONS) {
1326
1327                 /* Analyze signal for disconnected antenna */
1328                 average_sig[0] = (data->chain_signal_a) / CAL_NUM_OF_BEACONS;
1329                 average_sig[1] = (data->chain_signal_b) / CAL_NUM_OF_BEACONS;
1330                 average_sig[2] = (data->chain_signal_c) / CAL_NUM_OF_BEACONS;
1331
1332                 if (average_sig[0] >= average_sig[1]) {
1333                         max_average_sig = average_sig[0];
1334                         max_average_sig_antenna_i = 0;
1335                         active_chains = (1 << max_average_sig_antenna_i);
1336                 } else {
1337                         max_average_sig = average_sig[1];
1338                         max_average_sig_antenna_i = 1;
1339                         active_chains = (1 << max_average_sig_antenna_i);
1340                 }
1341
1342                 if (average_sig[2] >= max_average_sig) {
1343                         max_average_sig = average_sig[2];
1344                         max_average_sig_antenna_i = 2;
1345                         active_chains = (1 << max_average_sig_antenna_i);
1346                 }
1347
1348                 IWL_DEBUG_CALIB("average_sig: a %d b %d c %d\n",
1349                              average_sig[0], average_sig[1], average_sig[2]);
1350                 IWL_DEBUG_CALIB("max_average_sig = %d, antenna %d\n",
1351                              max_average_sig, max_average_sig_antenna_i);
1352
1353                 /* Compare signal strengths for all 3 receivers. */
1354                 for (i = 0; i < NUM_RX_CHAINS; i++) {
1355                         if (i != max_average_sig_antenna_i) {
1356                                 s32 rssi_delta = (max_average_sig -
1357                                                   average_sig[i]);
1358
1359                                 /* If signal is very weak, compared with
1360                                  * strongest, mark it as disconnected. */
1361                                 if (rssi_delta > MAXIMUM_ALLOWED_PATHLOSS)
1362                                         data->disconn_array[i] = 1;
1363                                 else
1364                                         active_chains |= (1 << i);
1365                         IWL_DEBUG_CALIB("i = %d  rssiDelta = %d  "
1366                                      "disconn_array[i] = %d\n",
1367                                      i, rssi_delta, data->disconn_array[i]);
1368                         }
1369                 }
1370
1371                 /*If both chains A & B are disconnected -
1372                  * connect B and leave A as is */
1373                 if (data->disconn_array[CHAIN_A] &&
1374                     data->disconn_array[CHAIN_B]) {
1375                         data->disconn_array[CHAIN_B] = 0;
1376                         active_chains |= (1 << CHAIN_B);
1377                         IWL_DEBUG_CALIB("both A & B chains are disconnected! "
1378                                      "W/A - declare B as connected\n");
1379                 }
1380
1381                 IWL_DEBUG_CALIB("active_chains (bitwise) = 0x%x\n",
1382                                 active_chains);
1383
1384                 /* Save for use within RXON, TX, SCAN commands, etc. */
1385                 priv->valid_antenna = active_chains;
1386
1387                 /* Analyze noise for rx balance */
1388                 average_noise[0] = ((data->chain_noise_a)/CAL_NUM_OF_BEACONS);
1389                 average_noise[1] = ((data->chain_noise_b)/CAL_NUM_OF_BEACONS);
1390                 average_noise[2] = ((data->chain_noise_c)/CAL_NUM_OF_BEACONS);
1391
1392                 for (i = 0; i < NUM_RX_CHAINS; i++) {
1393                         if (!(data->disconn_array[i]) &&
1394                            (average_noise[i] <= min_average_noise)) {
1395                                 /* This means that chain i is active and has
1396                                  * lower noise values so far: */
1397                                 min_average_noise = average_noise[i];
1398                                 min_average_noise_antenna_i = i;
1399                         }
1400                 }
1401
1402                 data->delta_gain_code[min_average_noise_antenna_i] = 0;
1403
1404                 IWL_DEBUG_CALIB("average_noise: a %d b %d c %d\n",
1405                                 average_noise[0], average_noise[1],
1406                                 average_noise[2]);
1407
1408                 IWL_DEBUG_CALIB("min_average_noise = %d, antenna %d\n",
1409                                 min_average_noise, min_average_noise_antenna_i);
1410
1411                 for (i = 0; i < NUM_RX_CHAINS; i++) {
1412                         s32 delta_g = 0;
1413
1414                         if (!(data->disconn_array[i]) &&
1415                             (data->delta_gain_code[i] ==
1416                              CHAIN_NOISE_DELTA_GAIN_INIT_VAL)) {
1417                                 delta_g = average_noise[i] - min_average_noise;
1418                                 data->delta_gain_code[i] = (u8)((delta_g *
1419                                                                     10) / 15);
1420                                 if (CHAIN_NOISE_MAX_DELTA_GAIN_CODE <
1421                                    data->delta_gain_code[i])
1422                                         data->delta_gain_code[i] =
1423                                           CHAIN_NOISE_MAX_DELTA_GAIN_CODE;
1424
1425                                 data->delta_gain_code[i] =
1426                                         (data->delta_gain_code[i] | (1 << 2));
1427                         } else
1428                                 data->delta_gain_code[i] = 0;
1429                 }
1430                 IWL_DEBUG_CALIB("delta_gain_codes: a %d b %d c %d\n",
1431                              data->delta_gain_code[0],
1432                              data->delta_gain_code[1],
1433                              data->delta_gain_code[2]);
1434
1435                 /* Differential gain gets sent to uCode only once */
1436                 if (!data->radio_write) {
1437                         struct iwl4965_calibration_cmd cmd;
1438                         data->radio_write = 1;
1439
1440                         memset(&cmd, 0, sizeof(cmd));
1441                         cmd.opCode = PHY_CALIBRATE_DIFF_GAIN_CMD;
1442                         cmd.diff_gain_a = data->delta_gain_code[0];
1443                         cmd.diff_gain_b = data->delta_gain_code[1];
1444                         cmd.diff_gain_c = data->delta_gain_code[2];
1445                         rc = iwl4965_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
1446                                               sizeof(cmd), &cmd);
1447                         if (rc)
1448                                 IWL_DEBUG_CALIB("fail sending cmd "
1449                                              "REPLY_PHY_CALIBRATION_CMD \n");
1450
1451                         /* TODO we might want recalculate
1452                          * rx_chain in rxon cmd */
1453
1454                         /* Mark so we run this algo only once! */
1455                         data->state = IWL_CHAIN_NOISE_CALIBRATED;
1456                 }
1457                 data->chain_noise_a = 0;
1458                 data->chain_noise_b = 0;
1459                 data->chain_noise_c = 0;
1460                 data->chain_signal_a = 0;
1461                 data->chain_signal_b = 0;
1462                 data->chain_signal_c = 0;
1463                 data->beacon_count = 0;
1464         }
1465         return;
1466 }
1467
1468 static void iwl4965_sensitivity_calibration(struct iwl4965_priv *priv,
1469                                             struct iwl4965_notif_statistics *resp)
1470 {
1471         int rc = 0;
1472         u32 rx_enable_time;
1473         u32 fa_cck;
1474         u32 fa_ofdm;
1475         u32 bad_plcp_cck;
1476         u32 bad_plcp_ofdm;
1477         u32 norm_fa_ofdm;
1478         u32 norm_fa_cck;
1479         struct iwl4965_sensitivity_data *data = NULL;
1480         struct statistics_rx_non_phy *rx_info = &(resp->rx.general);
1481         struct statistics_rx *statistics = &(resp->rx);
1482         unsigned long flags;
1483         struct statistics_general_data statis;
1484
1485         data = &(priv->sensitivity_data);
1486
1487         if (!iwl4965_is_associated(priv)) {
1488                 IWL_DEBUG_CALIB("<< - not associated\n");
1489                 return;
1490         }
1491
1492         spin_lock_irqsave(&priv->lock, flags);
1493         if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) {
1494                 IWL_DEBUG_CALIB("<< invalid data.\n");
1495                 spin_unlock_irqrestore(&priv->lock, flags);
1496                 return;
1497         }
1498
1499         /* Extract Statistics: */
1500         rx_enable_time = le32_to_cpu(rx_info->channel_load);
1501         fa_cck = le32_to_cpu(statistics->cck.false_alarm_cnt);
1502         fa_ofdm = le32_to_cpu(statistics->ofdm.false_alarm_cnt);
1503         bad_plcp_cck = le32_to_cpu(statistics->cck.plcp_err);
1504         bad_plcp_ofdm = le32_to_cpu(statistics->ofdm.plcp_err);
1505
1506         statis.beacon_silence_rssi_a =
1507                         le32_to_cpu(statistics->general.beacon_silence_rssi_a);
1508         statis.beacon_silence_rssi_b =
1509                         le32_to_cpu(statistics->general.beacon_silence_rssi_b);
1510         statis.beacon_silence_rssi_c =
1511                         le32_to_cpu(statistics->general.beacon_silence_rssi_c);
1512         statis.beacon_energy_a =
1513                         le32_to_cpu(statistics->general.beacon_energy_a);
1514         statis.beacon_energy_b =
1515                         le32_to_cpu(statistics->general.beacon_energy_b);
1516         statis.beacon_energy_c =
1517                         le32_to_cpu(statistics->general.beacon_energy_c);
1518
1519         spin_unlock_irqrestore(&priv->lock, flags);
1520
1521         IWL_DEBUG_CALIB("rx_enable_time = %u usecs\n", rx_enable_time);
1522
1523         if (!rx_enable_time) {
1524                 IWL_DEBUG_CALIB("<< RX Enable Time == 0! \n");
1525                 return;
1526         }
1527
1528         /* These statistics increase monotonically, and do not reset
1529          *   at each beacon.  Calculate difference from last value, or just
1530          *   use the new statistics value if it has reset or wrapped around. */
1531         if (data->last_bad_plcp_cnt_cck > bad_plcp_cck)
1532                 data->last_bad_plcp_cnt_cck = bad_plcp_cck;
1533         else {
1534                 bad_plcp_cck -= data->last_bad_plcp_cnt_cck;
1535                 data->last_bad_plcp_cnt_cck += bad_plcp_cck;
1536         }
1537
1538         if (data->last_bad_plcp_cnt_ofdm > bad_plcp_ofdm)
1539                 data->last_bad_plcp_cnt_ofdm = bad_plcp_ofdm;
1540         else {
1541                 bad_plcp_ofdm -= data->last_bad_plcp_cnt_ofdm;
1542                 data->last_bad_plcp_cnt_ofdm += bad_plcp_ofdm;
1543         }
1544
1545         if (data->last_fa_cnt_ofdm > fa_ofdm)
1546                 data->last_fa_cnt_ofdm = fa_ofdm;
1547         else {
1548                 fa_ofdm -= data->last_fa_cnt_ofdm;
1549                 data->last_fa_cnt_ofdm += fa_ofdm;
1550         }
1551
1552         if (data->last_fa_cnt_cck > fa_cck)
1553                 data->last_fa_cnt_cck = fa_cck;
1554         else {
1555                 fa_cck -= data->last_fa_cnt_cck;
1556                 data->last_fa_cnt_cck += fa_cck;
1557         }
1558
1559         /* Total aborted signal locks */
1560         norm_fa_ofdm = fa_ofdm + bad_plcp_ofdm;
1561         norm_fa_cck = fa_cck + bad_plcp_cck;
1562
1563         IWL_DEBUG_CALIB("cck: fa %u badp %u  ofdm: fa %u badp %u\n", fa_cck,
1564                         bad_plcp_cck, fa_ofdm, bad_plcp_ofdm);
1565
1566         iwl4965_sens_auto_corr_ofdm(priv, norm_fa_ofdm, rx_enable_time);
1567         iwl4965_sens_energy_cck(priv, norm_fa_cck, rx_enable_time, &statis);
1568         rc |= iwl4965_sensitivity_write(priv, CMD_ASYNC);
1569
1570         return;
1571 }
1572
1573 static void iwl4965_bg_sensitivity_work(struct work_struct *work)
1574 {
1575         struct iwl4965_priv *priv = container_of(work, struct iwl4965_priv,
1576                         sensitivity_work);
1577
1578         mutex_lock(&priv->mutex);
1579
1580         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
1581             test_bit(STATUS_SCANNING, &priv->status)) {
1582                 mutex_unlock(&priv->mutex);
1583                 return;
1584         }
1585
1586         if (priv->start_calib) {
1587                 iwl4965_noise_calibration(priv, &priv->statistics);
1588
1589                 if (priv->sensitivity_data.state ==
1590                                         IWL_SENS_CALIB_NEED_REINIT) {
1591                         iwl4965_init_sensitivity(priv, CMD_ASYNC, 0);
1592                         priv->sensitivity_data.state = IWL_SENS_CALIB_ALLOWED;
1593                 } else
1594                         iwl4965_sensitivity_calibration(priv,
1595                                         &priv->statistics);
1596         }
1597
1598         mutex_unlock(&priv->mutex);
1599         return;
1600 }
1601 #endif /*CONFIG_IWL4965_SENSITIVITY*/
1602
1603 static void iwl4965_bg_txpower_work(struct work_struct *work)
1604 {
1605         struct iwl4965_priv *priv = container_of(work, struct iwl4965_priv,
1606                         txpower_work);
1607
1608         /* If a scan happened to start before we got here
1609          * then just return; the statistics notification will
1610          * kick off another scheduled work to compensate for
1611          * any temperature delta we missed here. */
1612         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
1613             test_bit(STATUS_SCANNING, &priv->status))
1614                 return;
1615
1616         mutex_lock(&priv->mutex);
1617
1618         /* Regardless of if we are assocaited, we must reconfigure the
1619          * TX power since frames can be sent on non-radar channels while
1620          * not associated */
1621         iwl4965_hw_reg_send_txpower(priv);
1622
1623         /* Update last_temperature to keep is_calib_needed from running
1624          * when it isn't needed... */
1625         priv->last_temperature = priv->temperature;
1626
1627         mutex_unlock(&priv->mutex);
1628 }
1629
1630 /*
1631  * Acquire priv->lock before calling this function !
1632  */
1633 static void iwl4965_set_wr_ptrs(struct iwl4965_priv *priv, int txq_id, u32 index)
1634 {
1635         iwl4965_write_direct32(priv, HBUS_TARG_WRPTR,
1636                              (index & 0xff) | (txq_id << 8));
1637         iwl4965_write_prph(priv, KDR_SCD_QUEUE_RDPTR(txq_id), index);
1638 }
1639
1640 /**
1641  * iwl4965_tx_queue_set_status - (optionally) start Tx/Cmd queue
1642  * @tx_fifo_id: Tx DMA/FIFO channel (range 0-7) that the queue will feed
1643  * @scd_retry: (1) Indicates queue will be used in aggregation mode
1644  *
1645  * NOTE:  Acquire priv->lock before calling this function !
1646  */
1647 static void iwl4965_tx_queue_set_status(struct iwl4965_priv *priv,
1648                                         struct iwl4965_tx_queue *txq,
1649                                         int tx_fifo_id, int scd_retry)
1650 {
1651         int txq_id = txq->q.id;
1652
1653         /* Find out whether to activate Tx queue */
1654         int active = test_bit(txq_id, &priv->txq_ctx_active_msk)?1:0;
1655
1656         /* Set up and activate */
1657         iwl4965_write_prph(priv, KDR_SCD_QUEUE_STATUS_BITS(txq_id),
1658                                  (active << SCD_QUEUE_STTS_REG_POS_ACTIVE) |
1659                                  (tx_fifo_id << SCD_QUEUE_STTS_REG_POS_TXF) |
1660                                  (scd_retry << SCD_QUEUE_STTS_REG_POS_WSL) |
1661                                  (scd_retry << SCD_QUEUE_STTS_REG_POS_SCD_ACK) |
1662                                  SCD_QUEUE_STTS_REG_MSK);
1663
1664         txq->sched_retry = scd_retry;
1665
1666         IWL_DEBUG_INFO("%s %s Queue %d on AC %d\n",
1667                        active ? "Activate" : "Deactivate",
1668                        scd_retry ? "BA" : "AC", txq_id, tx_fifo_id);
1669 }
1670
1671 static const u16 default_queue_to_tx_fifo[] = {
1672         IWL_TX_FIFO_AC3,
1673         IWL_TX_FIFO_AC2,
1674         IWL_TX_FIFO_AC1,
1675         IWL_TX_FIFO_AC0,
1676         IWL_CMD_FIFO_NUM,
1677         IWL_TX_FIFO_HCCA_1,
1678         IWL_TX_FIFO_HCCA_2
1679 };
1680
1681 static inline void iwl4965_txq_ctx_activate(struct iwl4965_priv *priv, int txq_id)
1682 {
1683         set_bit(txq_id, &priv->txq_ctx_active_msk);
1684 }
1685
1686 static inline void iwl4965_txq_ctx_deactivate(struct iwl4965_priv *priv, int txq_id)
1687 {
1688         clear_bit(txq_id, &priv->txq_ctx_active_msk);
1689 }
1690
1691 int iwl4965_alive_notify(struct iwl4965_priv *priv)
1692 {
1693         u32 a;
1694         int i = 0;
1695         unsigned long flags;
1696         int rc;
1697
1698         spin_lock_irqsave(&priv->lock, flags);
1699
1700 #ifdef CONFIG_IWL4965_SENSITIVITY
1701         memset(&(priv->sensitivity_data), 0,
1702                sizeof(struct iwl4965_sensitivity_data));
1703         memset(&(priv->chain_noise_data), 0,
1704                sizeof(struct iwl4965_chain_noise_data));
1705         for (i = 0; i < NUM_RX_CHAINS; i++)
1706                 priv->chain_noise_data.delta_gain_code[i] =
1707                                 CHAIN_NOISE_DELTA_GAIN_INIT_VAL;
1708 #endif /* CONFIG_IWL4965_SENSITIVITY*/
1709         rc = iwl4965_grab_nic_access(priv);
1710         if (rc) {
1711                 spin_unlock_irqrestore(&priv->lock, flags);
1712                 return rc;
1713         }
1714
1715         /* Clear 4965's internal Tx Scheduler data base */
1716         priv->scd_base_addr = iwl4965_read_prph(priv, KDR_SCD_SRAM_BASE_ADDR);
1717         a = priv->scd_base_addr + SCD_CONTEXT_DATA_OFFSET;
1718         for (; a < priv->scd_base_addr + SCD_TX_STTS_BITMAP_OFFSET; a += 4)
1719                 iwl4965_write_targ_mem(priv, a, 0);
1720         for (; a < priv->scd_base_addr + SCD_TRANSLATE_TBL_OFFSET; a += 4)
1721                 iwl4965_write_targ_mem(priv, a, 0);
1722         for (; a < sizeof(u16) * priv->hw_setting.max_txq_num; a += 4)
1723                 iwl4965_write_targ_mem(priv, a, 0);
1724
1725         /* Tel 4965 where to find Tx byte count tables */
1726         iwl4965_write_prph(priv, KDR_SCD_DRAM_BASE_ADDR,
1727                 (priv->hw_setting.shared_phys +
1728                  offsetof(struct iwl4965_shared, queues_byte_cnt_tbls)) >> 10);
1729
1730         /* Disable chain mode for all queues */
1731         iwl4965_write_prph(priv, KDR_SCD_QUEUECHAIN_SEL, 0);
1732
1733         /* Initialize each Tx queue (including the command queue) */
1734         for (i = 0; i < priv->hw_setting.max_txq_num; i++) {
1735
1736                 /* TFD circular buffer read/write indexes */
1737                 iwl4965_write_prph(priv, KDR_SCD_QUEUE_RDPTR(i), 0);
1738                 iwl4965_write_direct32(priv, HBUS_TARG_WRPTR, 0 | (i << 8));
1739
1740                 /* Max Tx Window size for Scheduler-ACK mode */
1741                 iwl4965_write_targ_mem(priv, priv->scd_base_addr +
1742                                         SCD_CONTEXT_QUEUE_OFFSET(i),
1743                                         (SCD_WIN_SIZE <<
1744                                         SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
1745                                         SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
1746
1747                 /* Frame limit */
1748                 iwl4965_write_targ_mem(priv, priv->scd_base_addr +
1749                                         SCD_CONTEXT_QUEUE_OFFSET(i) +
1750                                         sizeof(u32),
1751                                         (SCD_FRAME_LIMIT <<
1752                                         SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) &
1753                                         SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
1754
1755         }
1756         iwl4965_write_prph(priv, KDR_SCD_INTERRUPT_MASK,
1757                                  (1 << priv->hw_setting.max_txq_num) - 1);
1758
1759         /* Activate all Tx DMA/FIFO channels */
1760         iwl4965_write_prph(priv, KDR_SCD_TXFACT,
1761                                  SCD_TXFACT_REG_TXFIFO_MASK(0, 7));
1762
1763         iwl4965_set_wr_ptrs(priv, IWL_CMD_QUEUE_NUM, 0);
1764
1765         /* Map each Tx/cmd queue to its corresponding fifo */
1766         for (i = 0; i < ARRAY_SIZE(default_queue_to_tx_fifo); i++) {
1767                 int ac = default_queue_to_tx_fifo[i];
1768                 iwl4965_txq_ctx_activate(priv, i);
1769                 iwl4965_tx_queue_set_status(priv, &priv->txq[i], ac, 0);
1770         }
1771
1772         iwl4965_release_nic_access(priv);
1773         spin_unlock_irqrestore(&priv->lock, flags);
1774
1775         return 0;
1776 }
1777
1778 /**
1779  * iwl4965_hw_set_hw_setting
1780  *
1781  * Called when initializing driver
1782  */
1783 int iwl4965_hw_set_hw_setting(struct iwl4965_priv *priv)
1784 {
1785         /* Allocate area for Tx byte count tables and Rx queue status */
1786         priv->hw_setting.shared_virt =
1787             pci_alloc_consistent(priv->pci_dev,
1788                                  sizeof(struct iwl4965_shared),
1789                                  &priv->hw_setting.shared_phys);
1790
1791         if (!priv->hw_setting.shared_virt)
1792                 return -1;
1793
1794         memset(priv->hw_setting.shared_virt, 0, sizeof(struct iwl4965_shared));
1795
1796         priv->hw_setting.max_txq_num = iwl4965_param_queues_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
1808         priv->hw_setting.tx_ant_num = 2;
1809
1810         return 0;
1811 }
1812
1813 /**
1814  * iwl4965_hw_txq_ctx_free - Free TXQ Context
1815  *
1816  * Destroy all TX DMA queues and structures
1817  */
1818 void iwl4965_hw_txq_ctx_free(struct iwl4965_priv *priv)
1819 {
1820         int txq_id;
1821
1822         /* Tx queues */
1823         for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++)
1824                 iwl4965_tx_queue_free(priv, &priv->txq[txq_id]);
1825
1826         /* Keep-warm buffer */
1827         iwl4965_kw_free(priv);
1828 }
1829
1830 /**
1831  * iwl4965_hw_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr]
1832  *
1833  * Does NOT advance any TFD circular buffer read/write indexes
1834  * Does NOT free the TFD itself (which is within circular buffer)
1835  */
1836 int iwl4965_hw_txq_free_tfd(struct iwl4965_priv *priv, struct iwl4965_tx_queue *txq)
1837 {
1838         struct iwl4965_tfd_frame *bd_tmp = (struct iwl4965_tfd_frame *)&txq->bd[0];
1839         struct iwl4965_tfd_frame *bd = &bd_tmp[txq->q.read_ptr];
1840         struct pci_dev *dev = priv->pci_dev;
1841         int i;
1842         int counter = 0;
1843         int index, is_odd;
1844
1845         /* Host command buffers stay mapped in memory, nothing to clean */
1846         if (txq->q.id == IWL_CMD_QUEUE_NUM)
1847                 return 0;
1848
1849         /* Sanity check on number of chunks */
1850         counter = IWL_GET_BITS(*bd, num_tbs);
1851         if (counter > MAX_NUM_OF_TBS) {
1852                 IWL_ERROR("Too many chunks: %i\n", counter);
1853                 /* @todo issue fatal error, it is quite serious situation */
1854                 return 0;
1855         }
1856
1857         /* Unmap chunks, if any.
1858          * TFD info for odd chunks is different format than for even chunks. */
1859         for (i = 0; i < counter; i++) {
1860                 index = i / 2;
1861                 is_odd = i & 0x1;
1862
1863                 if (is_odd)
1864                         pci_unmap_single(
1865                                 dev,
1866                                 IWL_GET_BITS(bd->pa[index], tb2_addr_lo16) |
1867                                 (IWL_GET_BITS(bd->pa[index],
1868                                               tb2_addr_hi20) << 16),
1869                                 IWL_GET_BITS(bd->pa[index], tb2_len),
1870                                 PCI_DMA_TODEVICE);
1871
1872                 else if (i > 0)
1873                         pci_unmap_single(dev,
1874                                          le32_to_cpu(bd->pa[index].tb1_addr),
1875                                          IWL_GET_BITS(bd->pa[index], tb1_len),
1876                                          PCI_DMA_TODEVICE);
1877
1878                 /* Free SKB, if any, for this chunk */
1879                 if (txq->txb[txq->q.read_ptr].skb[i]) {
1880                         struct sk_buff *skb = txq->txb[txq->q.read_ptr].skb[i];
1881
1882                         dev_kfree_skb(skb);
1883                         txq->txb[txq->q.read_ptr].skb[i] = NULL;
1884                 }
1885         }
1886         return 0;
1887 }
1888
1889 int iwl4965_hw_reg_set_txpower(struct iwl4965_priv *priv, s8 power)
1890 {
1891         IWL_ERROR("TODO: Implement iwl4965_hw_reg_set_txpower!\n");
1892         return -EINVAL;
1893 }
1894
1895 static s32 iwl4965_math_div_round(s32 num, s32 denom, s32 *res)
1896 {
1897         s32 sign = 1;
1898
1899         if (num < 0) {
1900                 sign = -sign;
1901                 num = -num;
1902         }
1903         if (denom < 0) {
1904                 sign = -sign;
1905                 denom = -denom;
1906         }
1907         *res = 1;
1908         *res = ((num * 2 + denom) / (denom * 2)) * sign;
1909
1910         return 1;
1911 }
1912
1913 /**
1914  * iwl4965_get_voltage_compensation - Power supply voltage comp for txpower
1915  *
1916  * Determines power supply voltage compensation for txpower calculations.
1917  * Returns number of 1/2-dB steps to subtract from gain table index,
1918  * to compensate for difference between power supply voltage during
1919  * factory measurements, vs. current power supply voltage.
1920  *
1921  * Voltage indication is higher for lower voltage.
1922  * Lower voltage requires more gain (lower gain table index).
1923  */
1924 static s32 iwl4965_get_voltage_compensation(s32 eeprom_voltage,
1925                                             s32 current_voltage)
1926 {
1927         s32 comp = 0;
1928
1929         if ((TX_POWER_IWL_ILLEGAL_VOLTAGE == eeprom_voltage) ||
1930             (TX_POWER_IWL_ILLEGAL_VOLTAGE == current_voltage))
1931                 return 0;
1932
1933         iwl4965_math_div_round(current_voltage - eeprom_voltage,
1934                                TX_POWER_IWL_VOLTAGE_CODES_PER_03V, &comp);
1935
1936         if (current_voltage > eeprom_voltage)
1937                 comp *= 2;
1938         if ((comp < -2) || (comp > 2))
1939                 comp = 0;
1940
1941         return comp;
1942 }
1943
1944 static const struct iwl4965_channel_info *
1945 iwl4965_get_channel_txpower_info(struct iwl4965_priv *priv,
1946                                  enum ieee80211_band band, u16 channel)
1947 {
1948         const struct iwl4965_channel_info *ch_info;
1949
1950         ch_info = iwl4965_get_channel_info(priv, band, channel);
1951
1952         if (!is_channel_valid(ch_info))
1953                 return NULL;
1954
1955         return ch_info;
1956 }
1957
1958 static s32 iwl4965_get_tx_atten_grp(u16 channel)
1959 {
1960         if (channel >= CALIB_IWL_TX_ATTEN_GR5_FCH &&
1961             channel <= CALIB_IWL_TX_ATTEN_GR5_LCH)
1962                 return CALIB_CH_GROUP_5;
1963
1964         if (channel >= CALIB_IWL_TX_ATTEN_GR1_FCH &&
1965             channel <= CALIB_IWL_TX_ATTEN_GR1_LCH)
1966                 return CALIB_CH_GROUP_1;
1967
1968         if (channel >= CALIB_IWL_TX_ATTEN_GR2_FCH &&
1969             channel <= CALIB_IWL_TX_ATTEN_GR2_LCH)
1970                 return CALIB_CH_GROUP_2;
1971
1972         if (channel >= CALIB_IWL_TX_ATTEN_GR3_FCH &&
1973             channel <= CALIB_IWL_TX_ATTEN_GR3_LCH)
1974                 return CALIB_CH_GROUP_3;
1975
1976         if (channel >= CALIB_IWL_TX_ATTEN_GR4_FCH &&
1977             channel <= CALIB_IWL_TX_ATTEN_GR4_LCH)
1978                 return CALIB_CH_GROUP_4;
1979
1980         IWL_ERROR("Can't find txatten group for channel %d.\n", channel);
1981         return -1;
1982 }
1983
1984 static u32 iwl4965_get_sub_band(const struct iwl4965_priv *priv, u32 channel)
1985 {
1986         s32 b = -1;
1987
1988         for (b = 0; b < EEPROM_TX_POWER_BANDS; b++) {
1989                 if (priv->eeprom.calib_info.band_info[b].ch_from == 0)
1990                         continue;
1991
1992                 if ((channel >= priv->eeprom.calib_info.band_info[b].ch_from)
1993                     && (channel <= priv->eeprom.calib_info.band_info[b].ch_to))
1994                         break;
1995         }
1996
1997         return b;
1998 }
1999
2000 static s32 iwl4965_interpolate_value(s32 x, s32 x1, s32 y1, s32 x2, s32 y2)
2001 {
2002         s32 val;
2003
2004         if (x2 == x1)
2005                 return y1;
2006         else {
2007                 iwl4965_math_div_round((x2 - x) * (y1 - y2), (x2 - x1), &val);
2008                 return val + y2;
2009         }
2010 }
2011
2012 /**
2013  * iwl4965_interpolate_chan - Interpolate factory measurements for one channel
2014  *
2015  * Interpolates factory measurements from the two sample channels within a
2016  * sub-band, to apply to channel of interest.  Interpolation is proportional to
2017  * differences in channel frequencies, which is proportional to differences
2018  * in channel number.
2019  */
2020 static int iwl4965_interpolate_chan(struct iwl4965_priv *priv, u32 channel,
2021                                     struct iwl4965_eeprom_calib_ch_info *chan_info)
2022 {
2023         s32 s = -1;
2024         u32 c;
2025         u32 m;
2026         const struct iwl4965_eeprom_calib_measure *m1;
2027         const struct iwl4965_eeprom_calib_measure *m2;
2028         struct iwl4965_eeprom_calib_measure *omeas;
2029         u32 ch_i1;
2030         u32 ch_i2;
2031
2032         s = iwl4965_get_sub_band(priv, channel);
2033         if (s >= EEPROM_TX_POWER_BANDS) {
2034                 IWL_ERROR("Tx Power can not find channel %d ", channel);
2035                 return -1;
2036         }
2037
2038         ch_i1 = priv->eeprom.calib_info.band_info[s].ch1.ch_num;
2039         ch_i2 = priv->eeprom.calib_info.band_info[s].ch2.ch_num;
2040         chan_info->ch_num = (u8) channel;
2041
2042         IWL_DEBUG_TXPOWER("channel %d subband %d factory cal ch %d & %d\n",
2043                           channel, s, ch_i1, ch_i2);
2044
2045         for (c = 0; c < EEPROM_TX_POWER_TX_CHAINS; c++) {
2046                 for (m = 0; m < EEPROM_TX_POWER_MEASUREMENTS; m++) {
2047                         m1 = &(priv->eeprom.calib_info.band_info[s].ch1.
2048                                measurements[c][m]);
2049                         m2 = &(priv->eeprom.calib_info.band_info[s].ch2.
2050                                measurements[c][m]);
2051                         omeas = &(chan_info->measurements[c][m]);
2052
2053                         omeas->actual_pow =
2054                             (u8) iwl4965_interpolate_value(channel, ch_i1,
2055                                                            m1->actual_pow,
2056                                                            ch_i2,
2057                                                            m2->actual_pow);
2058                         omeas->gain_idx =
2059                             (u8) iwl4965_interpolate_value(channel, ch_i1,
2060                                                            m1->gain_idx, ch_i2,
2061                                                            m2->gain_idx);
2062                         omeas->temperature =
2063                             (u8) iwl4965_interpolate_value(channel, ch_i1,
2064                                                            m1->temperature,
2065                                                            ch_i2,
2066                                                            m2->temperature);
2067                         omeas->pa_det =
2068                             (s8) iwl4965_interpolate_value(channel, ch_i1,
2069                                                            m1->pa_det, ch_i2,
2070                                                            m2->pa_det);
2071
2072                         IWL_DEBUG_TXPOWER
2073                             ("chain %d meas %d AP1=%d AP2=%d AP=%d\n", c, m,
2074                              m1->actual_pow, m2->actual_pow, omeas->actual_pow);
2075                         IWL_DEBUG_TXPOWER
2076                             ("chain %d meas %d NI1=%d NI2=%d NI=%d\n", c, m,
2077                              m1->gain_idx, m2->gain_idx, omeas->gain_idx);
2078                         IWL_DEBUG_TXPOWER
2079                             ("chain %d meas %d PA1=%d PA2=%d PA=%d\n", c, m,
2080                              m1->pa_det, m2->pa_det, omeas->pa_det);
2081                         IWL_DEBUG_TXPOWER
2082                             ("chain %d meas %d  T1=%d  T2=%d  T=%d\n", c, m,
2083                              m1->temperature, m2->temperature,
2084                              omeas->temperature);
2085                 }
2086         }
2087
2088         return 0;
2089 }
2090
2091 /* bit-rate-dependent table to prevent Tx distortion, in half-dB units,
2092  * for OFDM 6, 12, 18, 24, 36, 48, 54, 60 MBit, and CCK all rates. */
2093 static s32 back_off_table[] = {
2094         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 20 MHz */
2095         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 20 MHz */
2096         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 40 MHz */
2097         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 40 MHz */
2098         10                      /* CCK */
2099 };
2100
2101 /* Thermal compensation values for txpower for various frequency ranges ...
2102  *   ratios from 3:1 to 4.5:1 of degrees (Celsius) per half-dB gain adjust */
2103 static struct iwl4965_txpower_comp_entry {
2104         s32 degrees_per_05db_a;
2105         s32 degrees_per_05db_a_denom;
2106 } tx_power_cmp_tble[CALIB_CH_GROUP_MAX] = {
2107         {9, 2},                 /* group 0 5.2, ch  34-43 */
2108         {4, 1},                 /* group 1 5.2, ch  44-70 */
2109         {4, 1},                 /* group 2 5.2, ch  71-124 */
2110         {4, 1},                 /* group 3 5.2, ch 125-200 */
2111         {3, 1}                  /* group 4 2.4, ch   all */
2112 };
2113
2114 static s32 get_min_power_index(s32 rate_power_index, u32 band)
2115 {
2116         if (!band) {
2117                 if ((rate_power_index & 7) <= 4)
2118                         return MIN_TX_GAIN_INDEX_52GHZ_EXT;
2119         }
2120         return MIN_TX_GAIN_INDEX;
2121 }
2122
2123 struct gain_entry {
2124         u8 dsp;
2125         u8 radio;
2126 };
2127
2128 static const struct gain_entry gain_table[2][108] = {
2129         /* 5.2GHz power gain index table */
2130         {
2131          {123, 0x3F},           /* highest txpower */
2132          {117, 0x3F},
2133          {110, 0x3F},
2134          {104, 0x3F},
2135          {98, 0x3F},
2136          {110, 0x3E},
2137          {104, 0x3E},
2138          {98, 0x3E},
2139          {110, 0x3D},
2140          {104, 0x3D},
2141          {98, 0x3D},
2142          {110, 0x3C},
2143          {104, 0x3C},
2144          {98, 0x3C},
2145          {110, 0x3B},
2146          {104, 0x3B},
2147          {98, 0x3B},
2148          {110, 0x3A},
2149          {104, 0x3A},
2150          {98, 0x3A},
2151          {110, 0x39},
2152          {104, 0x39},
2153          {98, 0x39},
2154          {110, 0x38},
2155          {104, 0x38},
2156          {98, 0x38},
2157          {110, 0x37},
2158          {104, 0x37},
2159          {98, 0x37},
2160          {110, 0x36},
2161          {104, 0x36},
2162          {98, 0x36},
2163          {110, 0x35},
2164          {104, 0x35},
2165          {98, 0x35},
2166          {110, 0x34},
2167          {104, 0x34},
2168          {98, 0x34},
2169          {110, 0x33},
2170          {104, 0x33},
2171          {98, 0x33},
2172          {110, 0x32},
2173          {104, 0x32},
2174          {98, 0x32},
2175          {110, 0x31},
2176          {104, 0x31},
2177          {98, 0x31},
2178          {110, 0x30},
2179          {104, 0x30},
2180          {98, 0x30},
2181          {110, 0x25},
2182          {104, 0x25},
2183          {98, 0x25},
2184          {110, 0x24},
2185          {104, 0x24},
2186          {98, 0x24},
2187          {110, 0x23},
2188          {104, 0x23},
2189          {98, 0x23},
2190          {110, 0x22},
2191          {104, 0x18},
2192          {98, 0x18},
2193          {110, 0x17},
2194          {104, 0x17},
2195          {98, 0x17},
2196          {110, 0x16},
2197          {104, 0x16},
2198          {98, 0x16},
2199          {110, 0x15},
2200          {104, 0x15},
2201          {98, 0x15},
2202          {110, 0x14},
2203          {104, 0x14},
2204          {98, 0x14},
2205          {110, 0x13},
2206          {104, 0x13},
2207          {98, 0x13},
2208          {110, 0x12},
2209          {104, 0x08},
2210          {98, 0x08},
2211          {110, 0x07},
2212          {104, 0x07},
2213          {98, 0x07},
2214          {110, 0x06},
2215          {104, 0x06},
2216          {98, 0x06},
2217          {110, 0x05},
2218          {104, 0x05},
2219          {98, 0x05},
2220          {110, 0x04},
2221          {104, 0x04},
2222          {98, 0x04},
2223          {110, 0x03},
2224          {104, 0x03},
2225          {98, 0x03},
2226          {110, 0x02},
2227          {104, 0x02},
2228          {98, 0x02},
2229          {110, 0x01},
2230          {104, 0x01},
2231          {98, 0x01},
2232          {110, 0x00},
2233          {104, 0x00},
2234          {98, 0x00},
2235          {93, 0x00},
2236          {88, 0x00},
2237          {83, 0x00},
2238          {78, 0x00},
2239          },
2240         /* 2.4GHz power gain index table */
2241         {
2242          {110, 0x3f},           /* highest txpower */
2243          {104, 0x3f},
2244          {98, 0x3f},
2245          {110, 0x3e},
2246          {104, 0x3e},
2247          {98, 0x3e},
2248          {110, 0x3d},
2249          {104, 0x3d},
2250          {98, 0x3d},
2251          {110, 0x3c},
2252          {104, 0x3c},
2253          {98, 0x3c},
2254          {110, 0x3b},
2255          {104, 0x3b},
2256          {98, 0x3b},
2257          {110, 0x3a},
2258          {104, 0x3a},
2259          {98, 0x3a},
2260          {110, 0x39},
2261          {104, 0x39},
2262          {98, 0x39},
2263          {110, 0x38},
2264          {104, 0x38},
2265          {98, 0x38},
2266          {110, 0x37},
2267          {104, 0x37},
2268          {98, 0x37},
2269          {110, 0x36},
2270          {104, 0x36},
2271          {98, 0x36},
2272          {110, 0x35},
2273          {104, 0x35},
2274          {98, 0x35},
2275          {110, 0x34},
2276          {104, 0x34},
2277          {98, 0x34},
2278          {110, 0x33},
2279          {104, 0x33},
2280          {98, 0x33},
2281          {110, 0x32},
2282          {104, 0x32},
2283          {98, 0x32},
2284          {110, 0x31},
2285          {104, 0x31},
2286          {98, 0x31},
2287          {110, 0x30},
2288          {104, 0x30},
2289          {98, 0x30},
2290          {110, 0x6},
2291          {104, 0x6},
2292          {98, 0x6},
2293          {110, 0x5},
2294          {104, 0x5},
2295          {98, 0x5},
2296          {110, 0x4},
2297          {104, 0x4},
2298          {98, 0x4},
2299          {110, 0x3},
2300          {104, 0x3},
2301          {98, 0x3},
2302          {110, 0x2},
2303          {104, 0x2},
2304          {98, 0x2},
2305          {110, 0x1},
2306          {104, 0x1},
2307          {98, 0x1},
2308          {110, 0x0},
2309          {104, 0x0},
2310          {98, 0x0},
2311          {97, 0},
2312          {96, 0},
2313          {95, 0},
2314          {94, 0},
2315          {93, 0},
2316          {92, 0},
2317          {91, 0},
2318          {90, 0},
2319          {89, 0},
2320          {88, 0},
2321          {87, 0},
2322          {86, 0},
2323          {85, 0},
2324          {84, 0},
2325          {83, 0},
2326          {82, 0},
2327          {81, 0},
2328          {80, 0},
2329          {79, 0},
2330          {78, 0},
2331          {77, 0},
2332          {76, 0},
2333          {75, 0},
2334          {74, 0},
2335          {73, 0},
2336          {72, 0},
2337          {71, 0},
2338          {70, 0},
2339          {69, 0},
2340          {68, 0},
2341          {67, 0},
2342          {66, 0},
2343          {65, 0},
2344          {64, 0},
2345          {63, 0},
2346          {62, 0},
2347          {61, 0},
2348          {60, 0},
2349          {59, 0},
2350          }
2351 };
2352
2353 static int iwl4965_fill_txpower_tbl(struct iwl4965_priv *priv, u8 band, u16 channel,
2354                                     u8 is_fat, u8 ctrl_chan_high,
2355                                     struct iwl4965_tx_power_db *tx_power_tbl)
2356 {
2357         u8 saturation_power;
2358         s32 target_power;
2359         s32 user_target_power;
2360         s32 power_limit;
2361         s32 current_temp;
2362         s32 reg_limit;
2363         s32 current_regulatory;
2364         s32 txatten_grp = CALIB_CH_GROUP_MAX;
2365         int i;
2366         int c;
2367         const struct iwl4965_channel_info *ch_info = NULL;
2368         struct iwl4965_eeprom_calib_ch_info ch_eeprom_info;
2369         const struct iwl4965_eeprom_calib_measure *measurement;
2370         s16 voltage;
2371         s32 init_voltage;
2372         s32 voltage_compensation;
2373         s32 degrees_per_05db_num;
2374         s32 degrees_per_05db_denom;
2375         s32 factory_temp;
2376         s32 temperature_comp[2];
2377         s32 factory_gain_index[2];
2378         s32 factory_actual_pwr[2];
2379         s32 power_index;
2380
2381         /* Sanity check requested level (dBm) */
2382         if (priv->user_txpower_limit < IWL_TX_POWER_TARGET_POWER_MIN) {
2383                 IWL_WARNING("Requested user TXPOWER %d below limit.\n",
2384                             priv->user_txpower_limit);
2385                 return -EINVAL;
2386         }
2387         if (priv->user_txpower_limit > IWL_TX_POWER_TARGET_POWER_MAX) {
2388                 IWL_WARNING("Requested user TXPOWER %d above limit.\n",
2389                             priv->user_txpower_limit);
2390                 return -EINVAL;
2391         }
2392
2393         /* user_txpower_limit is in dBm, convert to half-dBm (half-dB units
2394          *   are used for indexing into txpower table) */
2395         user_target_power = 2 * priv->user_txpower_limit;
2396
2397         /* Get current (RXON) channel, band, width */
2398         ch_info =
2399                 iwl4965_get_channel_txpower_info(priv, priv->band, channel);
2400
2401         IWL_DEBUG_TXPOWER("chan %d band %d is_fat %d\n", channel, band,
2402                           is_fat);
2403
2404         if (!ch_info)
2405                 return -EINVAL;
2406
2407         /* get txatten group, used to select 1) thermal txpower adjustment
2408          *   and 2) mimo txpower balance between Tx chains. */
2409         txatten_grp = iwl4965_get_tx_atten_grp(channel);
2410         if (txatten_grp < 0)
2411                 return -EINVAL;
2412
2413         IWL_DEBUG_TXPOWER("channel %d belongs to txatten group %d\n",
2414                           channel, txatten_grp);
2415
2416         if (is_fat) {
2417                 if (ctrl_chan_high)
2418                         channel -= 2;
2419                 else
2420                         channel += 2;
2421         }
2422
2423         /* hardware txpower limits ...
2424          * saturation (clipping distortion) txpowers are in half-dBm */
2425         if (band)
2426                 saturation_power = priv->eeprom.calib_info.saturation_power24;
2427         else
2428                 saturation_power = priv->eeprom.calib_info.saturation_power52;
2429
2430         if (saturation_power < IWL_TX_POWER_SATURATION_MIN ||
2431             saturation_power > IWL_TX_POWER_SATURATION_MAX) {
2432                 if (band)
2433                         saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_24;
2434                 else
2435                         saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_52;
2436         }
2437
2438         /* regulatory txpower limits ... reg_limit values are in half-dBm,
2439          *   max_power_avg values are in dBm, convert * 2 */
2440         if (is_fat)
2441                 reg_limit = ch_info->fat_max_power_avg * 2;
2442         else
2443                 reg_limit = ch_info->max_power_avg * 2;
2444
2445         if ((reg_limit < IWL_TX_POWER_REGULATORY_MIN) ||
2446             (reg_limit > IWL_TX_POWER_REGULATORY_MAX)) {
2447                 if (band)
2448                         reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_24;
2449                 else
2450                         reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_52;
2451         }
2452
2453         /* Interpolate txpower calibration values for this channel,
2454          *   based on factory calibration tests on spaced channels. */
2455         iwl4965_interpolate_chan(priv, channel, &ch_eeprom_info);
2456
2457         /* calculate tx gain adjustment based on power supply voltage */
2458         voltage = priv->eeprom.calib_info.voltage;
2459         init_voltage = (s32)le32_to_cpu(priv->card_alive_init.voltage);
2460         voltage_compensation =
2461             iwl4965_get_voltage_compensation(voltage, init_voltage);
2462
2463         IWL_DEBUG_TXPOWER("curr volt %d eeprom volt %d volt comp %d\n",
2464                           init_voltage,
2465                           voltage, voltage_compensation);
2466
2467         /* get current temperature (Celsius) */
2468         current_temp = max(priv->temperature, IWL_TX_POWER_TEMPERATURE_MIN);
2469         current_temp = min(priv->temperature, IWL_TX_POWER_TEMPERATURE_MAX);
2470         current_temp = KELVIN_TO_CELSIUS(current_temp);
2471
2472         /* select thermal txpower adjustment params, based on channel group
2473          *   (same frequency group used for mimo txatten adjustment) */
2474         degrees_per_05db_num =
2475             tx_power_cmp_tble[txatten_grp].degrees_per_05db_a;
2476         degrees_per_05db_denom =
2477             tx_power_cmp_tble[txatten_grp].degrees_per_05db_a_denom;
2478
2479         /* get per-chain txpower values from factory measurements */
2480         for (c = 0; c < 2; c++) {
2481                 measurement = &ch_eeprom_info.measurements[c][1];
2482
2483                 /* txgain adjustment (in half-dB steps) based on difference
2484                  *   between factory and current temperature */
2485                 factory_temp = measurement->temperature;
2486                 iwl4965_math_div_round((current_temp - factory_temp) *
2487                                        degrees_per_05db_denom,
2488                                        degrees_per_05db_num,
2489                                        &temperature_comp[c]);
2490
2491                 factory_gain_index[c] = measurement->gain_idx;
2492                 factory_actual_pwr[c] = measurement->actual_pow;
2493
2494                 IWL_DEBUG_TXPOWER("chain = %d\n", c);
2495                 IWL_DEBUG_TXPOWER("fctry tmp %d, "
2496                                   "curr tmp %d, comp %d steps\n",
2497                                   factory_temp, current_temp,
2498                                   temperature_comp[c]);
2499
2500                 IWL_DEBUG_TXPOWER("fctry idx %d, fctry pwr %d\n",
2501                                   factory_gain_index[c],
2502                                   factory_actual_pwr[c]);
2503         }
2504
2505         /* for each of 33 bit-rates (including 1 for CCK) */
2506         for (i = 0; i < POWER_TABLE_NUM_ENTRIES; i++) {
2507                 u8 is_mimo_rate;
2508                 union iwl4965_tx_power_dual_stream tx_power;
2509
2510                 /* for mimo, reduce each chain's txpower by half
2511                  * (3dB, 6 steps), so total output power is regulatory
2512                  * compliant. */
2513                 if (i & 0x8) {
2514                         current_regulatory = reg_limit -
2515                             IWL_TX_POWER_MIMO_REGULATORY_COMPENSATION;
2516                         is_mimo_rate = 1;
2517                 } else {
2518                         current_regulatory = reg_limit;
2519                         is_mimo_rate = 0;
2520                 }
2521
2522                 /* find txpower limit, either hardware or regulatory */
2523                 power_limit = saturation_power - back_off_table[i];
2524                 if (power_limit > current_regulatory)
2525                         power_limit = current_regulatory;
2526
2527                 /* reduce user's txpower request if necessary
2528                  * for this rate on this channel */
2529                 target_power = user_target_power;
2530                 if (target_power > power_limit)
2531                         target_power = power_limit;
2532
2533                 IWL_DEBUG_TXPOWER("rate %d sat %d reg %d usr %d tgt %d\n",
2534                                   i, saturation_power - back_off_table[i],
2535                                   current_regulatory, user_target_power,
2536                                   target_power);
2537
2538                 /* for each of 2 Tx chains (radio transmitters) */
2539                 for (c = 0; c < 2; c++) {
2540                         s32 atten_value;
2541
2542                         if (is_mimo_rate)
2543                                 atten_value =
2544                                     (s32)le32_to_cpu(priv->card_alive_init.
2545                                     tx_atten[txatten_grp][c]);
2546                         else
2547                                 atten_value = 0;
2548
2549                         /* calculate index; higher index means lower txpower */
2550                         power_index = (u8) (factory_gain_index[c] -
2551                                             (target_power -
2552                                              factory_actual_pwr[c]) -
2553                                             temperature_comp[c] -
2554                                             voltage_compensation +
2555                                             atten_value);
2556
2557 /*                      IWL_DEBUG_TXPOWER("calculated txpower index %d\n",
2558                                                 power_index); */
2559
2560                         if (power_index < get_min_power_index(i, band))
2561                                 power_index = get_min_power_index(i, band);
2562
2563                         /* adjust 5 GHz index to support negative indexes */
2564                         if (!band)
2565                                 power_index += 9;
2566
2567                         /* CCK, rate 32, reduce txpower for CCK */
2568                         if (i == POWER_TABLE_CCK_ENTRY)
2569                                 power_index +=
2570                                     IWL_TX_POWER_CCK_COMPENSATION_C_STEP;
2571
2572                         /* stay within the table! */
2573                         if (power_index > 107) {
2574                                 IWL_WARNING("txpower index %d > 107\n",
2575                                             power_index);
2576                                 power_index = 107;
2577                         }
2578                         if (power_index < 0) {
2579                                 IWL_WARNING("txpower index %d < 0\n",
2580                                             power_index);
2581                                 power_index = 0;
2582                         }
2583
2584                         /* fill txpower command for this rate/chain */
2585                         tx_power.s.radio_tx_gain[c] =
2586                                 gain_table[band][power_index].radio;
2587                         tx_power.s.dsp_predis_atten[c] =
2588                                 gain_table[band][power_index].dsp;
2589
2590                         IWL_DEBUG_TXPOWER("chain %d mimo %d index %d "
2591                                           "gain 0x%02x dsp %d\n",
2592                                           c, atten_value, power_index,
2593                                         tx_power.s.radio_tx_gain[c],
2594                                         tx_power.s.dsp_predis_atten[c]);
2595                 }/* for each chain */
2596
2597                 tx_power_tbl->power_tbl[i].dw = cpu_to_le32(tx_power.dw);
2598
2599         }/* for each rate */
2600
2601         return 0;
2602 }
2603
2604 /**
2605  * iwl4965_hw_reg_send_txpower - Configure the TXPOWER level user limit
2606  *
2607  * Uses the active RXON for channel, band, and characteristics (fat, high)
2608  * The power limit is taken from priv->user_txpower_limit.
2609  */
2610 int iwl4965_hw_reg_send_txpower(struct iwl4965_priv *priv)
2611 {
2612         struct iwl4965_txpowertable_cmd cmd = { 0 };
2613         int rc = 0;
2614         u8 band = 0;
2615         u8 is_fat = 0;
2616         u8 ctrl_chan_high = 0;
2617
2618         if (test_bit(STATUS_SCANNING, &priv->status)) {
2619                 /* If this gets hit a lot, switch it to a BUG() and catch
2620                  * the stack trace to find out who is calling this during
2621                  * a scan. */
2622                 IWL_WARNING("TX Power requested while scanning!\n");
2623                 return -EAGAIN;
2624         }
2625
2626         band = priv->band == IEEE80211_BAND_2GHZ;
2627
2628         is_fat =  is_fat_channel(priv->active_rxon.flags);
2629
2630         if (is_fat &&
2631             (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
2632                 ctrl_chan_high = 1;
2633
2634         cmd.band = band;
2635         cmd.channel = priv->active_rxon.channel;
2636
2637         rc = iwl4965_fill_txpower_tbl(priv, band,
2638                                 le16_to_cpu(priv->active_rxon.channel),
2639                                 is_fat, ctrl_chan_high, &cmd.tx_power);
2640         if (rc)
2641                 return rc;
2642
2643         rc = iwl4965_send_cmd_pdu(priv, REPLY_TX_PWR_TABLE_CMD, sizeof(cmd), &cmd);
2644         return rc;
2645 }
2646
2647 int iwl4965_hw_channel_switch(struct iwl4965_priv *priv, u16 channel)
2648 {
2649         int rc;
2650         u8 band = 0;
2651         u8 is_fat = 0;
2652         u8 ctrl_chan_high = 0;
2653         struct iwl4965_channel_switch_cmd cmd = { 0 };
2654         const struct iwl4965_channel_info *ch_info;
2655
2656         band = priv->band == IEEE80211_BAND_2GHZ;
2657
2658         ch_info = iwl4965_get_channel_info(priv, priv->band, channel);
2659
2660         is_fat = is_fat_channel(priv->staging_rxon.flags);
2661
2662         if (is_fat &&
2663             (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
2664                 ctrl_chan_high = 1;
2665
2666         cmd.band = band;
2667         cmd.expect_beacon = 0;
2668         cmd.channel = cpu_to_le16(channel);
2669         cmd.rxon_flags = priv->active_rxon.flags;
2670         cmd.rxon_filter_flags = priv->active_rxon.filter_flags;
2671         cmd.switch_time = cpu_to_le32(priv->ucode_beacon_time);
2672         if (ch_info)
2673                 cmd.expect_beacon = is_channel_radar(ch_info);
2674         else
2675                 cmd.expect_beacon = 1;
2676
2677         rc = iwl4965_fill_txpower_tbl(priv, band, channel, is_fat,
2678                                       ctrl_chan_high, &cmd.tx_power);
2679         if (rc) {
2680                 IWL_DEBUG_11H("error:%d  fill txpower_tbl\n", rc);
2681                 return rc;
2682         }
2683
2684         rc = iwl4965_send_cmd_pdu(priv, REPLY_CHANNEL_SWITCH, sizeof(cmd), &cmd);
2685         return rc;
2686 }
2687
2688 #define RTS_HCCA_RETRY_LIMIT            3
2689 #define RTS_DFAULT_RETRY_LIMIT          60
2690
2691 void iwl4965_hw_build_tx_cmd_rate(struct iwl4965_priv *priv,
2692                               struct iwl4965_cmd *cmd,
2693                               struct ieee80211_tx_control *ctrl,
2694                               struct ieee80211_hdr *hdr, int sta_id,
2695                               int is_hcca)
2696 {
2697         struct iwl4965_tx_cmd *tx = &cmd->cmd.tx;
2698         u8 rts_retry_limit = 0;
2699         u8 data_retry_limit = 0;
2700         u16 fc = le16_to_cpu(hdr->frame_control);
2701         u8 rate_plcp;
2702         u16 rate_flags = 0;
2703         int rate_idx = min(ctrl->tx_rate->hw_value & 0xffff, IWL_RATE_COUNT - 1);
2704
2705         rate_plcp = iwl4965_rates[rate_idx].plcp;
2706
2707         rts_retry_limit = (is_hcca) ?
2708             RTS_HCCA_RETRY_LIMIT : RTS_DFAULT_RETRY_LIMIT;
2709
2710         if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
2711                 rate_flags |= RATE_MCS_CCK_MSK;
2712
2713
2714         if (ieee80211_is_probe_response(fc)) {
2715                 data_retry_limit = 3;
2716                 if (data_retry_limit < rts_retry_limit)
2717                         rts_retry_limit = data_retry_limit;
2718         } else
2719                 data_retry_limit = IWL_DEFAULT_TX_RETRY;
2720
2721         if (priv->data_retry_limit != -1)
2722                 data_retry_limit = priv->data_retry_limit;
2723
2724
2725         if (ieee80211_is_data(fc)) {
2726                 tx->initial_rate_index = 0;
2727                 tx->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
2728         } else {
2729                 switch (fc & IEEE80211_FCTL_STYPE) {
2730                 case IEEE80211_STYPE_AUTH:
2731                 case IEEE80211_STYPE_DEAUTH:
2732                 case IEEE80211_STYPE_ASSOC_REQ:
2733                 case IEEE80211_STYPE_REASSOC_REQ:
2734                         if (tx->tx_flags & TX_CMD_FLG_RTS_MSK) {
2735                                 tx->tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2736                                 tx->tx_flags |= TX_CMD_FLG_CTS_MSK;
2737                         }
2738                         break;
2739                 default:
2740                         break;
2741                 }
2742
2743                 /* Alternate between antenna A and B for successive frames */
2744                 if (priv->use_ant_b_for_management_frame) {
2745                         priv->use_ant_b_for_management_frame = 0;
2746                         rate_flags |= RATE_MCS_ANT_B_MSK;
2747                 } else {
2748                         priv->use_ant_b_for_management_frame = 1;
2749                         rate_flags |= RATE_MCS_ANT_A_MSK;
2750                 }
2751         }
2752
2753         tx->rts_retry_limit = rts_retry_limit;
2754         tx->data_retry_limit = data_retry_limit;
2755         tx->rate_n_flags = iwl4965_hw_set_rate_n_flags(rate_plcp, rate_flags);
2756 }
2757
2758 int iwl4965_hw_get_rx_read(struct iwl4965_priv *priv)
2759 {
2760         struct iwl4965_shared *shared_data = priv->hw_setting.shared_virt;
2761
2762         return IWL_GET_BITS(*shared_data, rb_closed_stts_rb_num);
2763 }
2764
2765 int iwl4965_hw_get_temperature(struct iwl4965_priv *priv)
2766 {
2767         return priv->temperature;
2768 }
2769
2770 unsigned int iwl4965_hw_get_beacon_cmd(struct iwl4965_priv *priv,
2771                           struct iwl4965_frame *frame, u8 rate)
2772 {
2773         struct iwl4965_tx_beacon_cmd *tx_beacon_cmd;
2774         unsigned int frame_size;
2775
2776         tx_beacon_cmd = &frame->u.beacon;
2777         memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
2778
2779         tx_beacon_cmd->tx.sta_id = IWL4965_BROADCAST_ID;
2780         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2781
2782         frame_size = iwl4965_fill_beacon_frame(priv,
2783                                 tx_beacon_cmd->frame,
2784                                 iwl4965_broadcast_addr,
2785                                 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
2786
2787         BUG_ON(frame_size > MAX_MPDU_SIZE);
2788         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
2789
2790         if ((rate == IWL_RATE_1M_PLCP) || (rate >= IWL_RATE_2M_PLCP))
2791                 tx_beacon_cmd->tx.rate_n_flags =
2792                         iwl4965_hw_set_rate_n_flags(rate, RATE_MCS_CCK_MSK);
2793         else
2794                 tx_beacon_cmd->tx.rate_n_flags =
2795                         iwl4965_hw_set_rate_n_flags(rate, 0);
2796
2797         tx_beacon_cmd->tx.tx_flags = (TX_CMD_FLG_SEQ_CTL_MSK |
2798                                 TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK);
2799         return (sizeof(*tx_beacon_cmd) + frame_size);
2800 }
2801
2802 /*
2803  * Tell 4965 where to find circular buffer of Tx Frame Descriptors for
2804  * given Tx queue, and enable the DMA channel used for that queue.
2805  *
2806  * 4965 supports up to 16 Tx queues in DRAM, mapped to up to 8 Tx DMA
2807  * channels supported in hardware.
2808  */
2809 int iwl4965_hw_tx_queue_init(struct iwl4965_priv *priv, struct iwl4965_tx_queue *txq)
2810 {
2811         int rc;
2812         unsigned long flags;
2813         int txq_id = txq->q.id;
2814
2815         spin_lock_irqsave(&priv->lock, flags);
2816         rc = iwl4965_grab_nic_access(priv);
2817         if (rc) {
2818                 spin_unlock_irqrestore(&priv->lock, flags);
2819                 return rc;
2820         }
2821
2822         /* Circular buffer (TFD queue in DRAM) physical base address */
2823         iwl4965_write_direct32(priv, FH_MEM_CBBC_QUEUE(txq_id),
2824                              txq->q.dma_addr >> 8);
2825
2826         /* Enable DMA channel, using same id as for TFD queue */
2827         iwl4965_write_direct32(
2828                 priv, IWL_FH_TCSR_CHNL_TX_CONFIG_REG(txq_id),
2829                 IWL_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE |
2830                 IWL_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE_VAL);
2831         iwl4965_release_nic_access(priv);
2832         spin_unlock_irqrestore(&priv->lock, flags);
2833
2834         return 0;
2835 }
2836
2837 int iwl4965_hw_txq_attach_buf_to_tfd(struct iwl4965_priv *priv, void *ptr,
2838                                  dma_addr_t addr, u16 len)
2839 {
2840         int index, is_odd;
2841         struct iwl4965_tfd_frame *tfd = ptr;
2842         u32 num_tbs = IWL_GET_BITS(*tfd, num_tbs);
2843
2844         /* Each TFD can point to a maximum 20 Tx buffers */
2845         if ((num_tbs >= MAX_NUM_OF_TBS) || (num_tbs < 0)) {
2846                 IWL_ERROR("Error can not send more than %d chunks\n",
2847                           MAX_NUM_OF_TBS);
2848                 return -EINVAL;
2849         }
2850
2851         index = num_tbs / 2;
2852         is_odd = num_tbs & 0x1;
2853
2854         if (!is_odd) {
2855                 tfd->pa[index].tb1_addr = cpu_to_le32(addr);
2856                 IWL_SET_BITS(tfd->pa[index], tb1_addr_hi,
2857                              iwl_get_dma_hi_address(addr));
2858                 IWL_SET_BITS(tfd->pa[index], tb1_len, len);
2859         } else {
2860                 IWL_SET_BITS(tfd->pa[index], tb2_addr_lo16,
2861                              (u32) (addr & 0xffff));
2862                 IWL_SET_BITS(tfd->pa[index], tb2_addr_hi20, addr >> 16);
2863                 IWL_SET_BITS(tfd->pa[index], tb2_len, len);
2864         }
2865
2866         IWL_SET_BITS(*tfd, num_tbs, num_tbs + 1);
2867
2868         return 0;
2869 }
2870
2871 static void iwl4965_hw_card_show_info(struct iwl4965_priv *priv)
2872 {
2873         u16 hw_version = priv->eeprom.board_revision_4965;
2874
2875         IWL_DEBUG_INFO("4965ABGN HW Version %u.%u.%u\n",
2876                        ((hw_version >> 8) & 0x0F),
2877                        ((hw_version >> 8) >> 4), (hw_version & 0x00FF));
2878
2879         IWL_DEBUG_INFO("4965ABGN PBA Number %.16s\n",
2880                        priv->eeprom.board_pba_number_4965);
2881 }
2882
2883 #define IWL_TX_CRC_SIZE         4
2884 #define IWL_TX_DELIMITER_SIZE   4
2885
2886 /**
2887  * iwl4965_tx_queue_update_wr_ptr - Set up entry in Tx byte-count array
2888  */
2889 int iwl4965_tx_queue_update_wr_ptr(struct iwl4965_priv *priv,
2890                                    struct iwl4965_tx_queue *txq, u16 byte_cnt)
2891 {
2892         int len;
2893         int txq_id = txq->q.id;
2894         struct iwl4965_shared *shared_data = priv->hw_setting.shared_virt;
2895
2896         if (txq->need_update == 0)
2897                 return 0;
2898
2899         len = byte_cnt + IWL_TX_CRC_SIZE + IWL_TX_DELIMITER_SIZE;
2900
2901         /* Set up byte count within first 256 entries */
2902         IWL_SET_BITS16(shared_data->queues_byte_cnt_tbls[txq_id].
2903                        tfd_offset[txq->q.write_ptr], byte_cnt, len);
2904
2905         /* If within first 64 entries, duplicate at end */
2906         if (txq->q.write_ptr < IWL4965_MAX_WIN_SIZE)
2907                 IWL_SET_BITS16(shared_data->queues_byte_cnt_tbls[txq_id].
2908                         tfd_offset[IWL4965_QUEUE_SIZE + txq->q.write_ptr],
2909                         byte_cnt, len);
2910
2911         return 0;
2912 }
2913
2914 /**
2915  * iwl4965_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
2916  *
2917  * Selects how many and which Rx receivers/antennas/chains to use.
2918  * This should not be used for scan command ... it puts data in wrong place.
2919  */
2920 void iwl4965_set_rxon_chain(struct iwl4965_priv *priv)
2921 {
2922         u8 is_single = is_single_stream(priv);
2923         u8 idle_state, rx_state;
2924
2925         priv->staging_rxon.rx_chain = 0;
2926         rx_state = idle_state = 3;
2927
2928         /* Tell uCode which antennas are actually connected.
2929          * Before first association, we assume all antennas are connected.
2930          * Just after first association, iwl4965_noise_calibration()
2931          *    checks which antennas actually *are* connected. */
2932         priv->staging_rxon.rx_chain |=
2933             cpu_to_le16(priv->valid_antenna << RXON_RX_CHAIN_VALID_POS);
2934
2935         /* How many receivers should we use? */
2936         iwl4965_get_rx_chain_counter(priv, &idle_state, &rx_state);
2937         priv->staging_rxon.rx_chain |=
2938                 cpu_to_le16(rx_state << RXON_RX_CHAIN_MIMO_CNT_POS);
2939         priv->staging_rxon.rx_chain |=
2940                 cpu_to_le16(idle_state << RXON_RX_CHAIN_CNT_POS);
2941
2942         if (!is_single && (rx_state >= 2) &&
2943             !test_bit(STATUS_POWER_PMI, &priv->status))
2944                 priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
2945         else
2946                 priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
2947
2948         IWL_DEBUG_ASSOC("rx chain %X\n", priv->staging_rxon.rx_chain);
2949 }
2950
2951 /**
2952  * sign_extend - Sign extend a value using specified bit as sign-bit
2953  *
2954  * Example: sign_extend(9, 3) would return -7 as bit3 of 1001b is 1
2955  * and bit0..2 is 001b which when sign extended to 1111111111111001b is -7.
2956  *
2957  * @param oper value to sign extend
2958  * @param index 0 based bit index (0<=index<32) to sign bit
2959  */
2960 static s32 sign_extend(u32 oper, int index)
2961 {
2962         u8 shift = 31 - index;
2963
2964         return (s32)(oper << shift) >> shift;
2965 }
2966
2967 /**
2968  * iwl4965_get_temperature - return the calibrated temperature (in Kelvin)
2969  * @statistics: Provides the temperature reading from the uCode
2970  *
2971  * A return of <0 indicates bogus data in the statistics
2972  */
2973 int iwl4965_get_temperature(const struct iwl4965_priv *priv)
2974 {
2975         s32 temperature;
2976         s32 vt;
2977         s32 R1, R2, R3;
2978         u32 R4;
2979
2980         if (test_bit(STATUS_TEMPERATURE, &priv->status) &&
2981                 (priv->statistics.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK)) {
2982                 IWL_DEBUG_TEMP("Running FAT temperature calibration\n");
2983                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[1]);
2984                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[1]);
2985                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[1]);
2986                 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[1]);
2987         } else {
2988                 IWL_DEBUG_TEMP("Running temperature calibration\n");
2989                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[0]);
2990                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[0]);
2991                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[0]);
2992                 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[0]);
2993         }
2994
2995         /*
2996          * Temperature is only 23 bits, so sign extend out to 32.
2997          *
2998          * NOTE If we haven't received a statistics notification yet
2999          * with an updated temperature, use R4 provided to us in the
3000          * "initialize" ALIVE response.
3001          */
3002         if (!test_bit(STATUS_TEMPERATURE, &priv->status))
3003                 vt = sign_extend(R4, 23);
3004         else
3005                 vt = sign_extend(
3006                         le32_to_cpu(priv->statistics.general.temperature), 23);
3007
3008         IWL_DEBUG_TEMP("Calib values R[1-3]: %d %d %d R4: %d\n",
3009                        R1, R2, R3, vt);
3010
3011         if (R3 == R1) {
3012                 IWL_ERROR("Calibration conflict R1 == R3\n");
3013                 return -1;
3014         }
3015
3016         /* Calculate temperature in degrees Kelvin, adjust by 97%.
3017          * Add offset to center the adjustment around 0 degrees Centigrade. */
3018         temperature = TEMPERATURE_CALIB_A_VAL * (vt - R2);
3019         temperature /= (R3 - R1);
3020         temperature = (temperature * 97) / 100 +
3021             TEMPERATURE_CALIB_KELVIN_OFFSET;
3022
3023         IWL_DEBUG_TEMP("Calibrated temperature: %dK, %dC\n", temperature,
3024             KELVIN_TO_CELSIUS(temperature));
3025
3026         return temperature;
3027 }
3028
3029 /* Adjust Txpower only if temperature variance is greater than threshold. */
3030 #define IWL_TEMPERATURE_THRESHOLD   3
3031
3032 /**
3033  * iwl4965_is_temp_calib_needed - determines if new calibration is needed
3034  *
3035  * If the temperature changed has changed sufficiently, then a recalibration
3036  * is needed.
3037  *
3038  * Assumes caller will replace priv->last_temperature once calibration
3039  * executed.
3040  */
3041 static int iwl4965_is_temp_calib_needed(struct iwl4965_priv *priv)
3042 {
3043         int temp_diff;
3044
3045         if (!test_bit(STATUS_STATISTICS, &priv->status)) {
3046                 IWL_DEBUG_TEMP("Temperature not updated -- no statistics.\n");
3047                 return 0;
3048         }
3049
3050         temp_diff = priv->temperature - priv->last_temperature;
3051
3052         /* get absolute value */
3053         if (temp_diff < 0) {
3054                 IWL_DEBUG_POWER("Getting cooler, delta %d, \n", temp_diff);
3055                 temp_diff = -temp_diff;
3056         } else if (temp_diff == 0)
3057                 IWL_DEBUG_POWER("Same temp, \n");
3058         else
3059                 IWL_DEBUG_POWER("Getting warmer, delta %d, \n", temp_diff);
3060
3061         if (temp_diff < IWL_TEMPERATURE_THRESHOLD) {
3062                 IWL_DEBUG_POWER("Thermal txpower calib not needed\n");
3063                 return 0;
3064         }
3065
3066         IWL_DEBUG_POWER("Thermal txpower calib needed\n");
3067
3068         return 1;
3069 }
3070
3071 /* Calculate noise level, based on measurements during network silence just
3072  *   before arriving beacon.  This measurement can be done only if we know
3073  *   exactly when to expect beacons, therefore only when we're associated. */
3074 static void iwl4965_rx_calc_noise(struct iwl4965_priv *priv)
3075 {
3076         struct statistics_rx_non_phy *rx_info
3077                                 = &(priv->statistics.rx.general);
3078         int num_active_rx = 0;
3079         int total_silence = 0;
3080         int bcn_silence_a =
3081                 le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER;
3082         int bcn_silence_b =
3083                 le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER;
3084         int bcn_silence_c =
3085                 le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER;
3086
3087         if (bcn_silence_a) {
3088                 total_silence += bcn_silence_a;
3089                 num_active_rx++;
3090         }
3091         if (bcn_silence_b) {
3092                 total_silence += bcn_silence_b;
3093                 num_active_rx++;
3094         }
3095         if (bcn_silence_c) {
3096                 total_silence += bcn_silence_c;
3097                 num_active_rx++;
3098         }
3099
3100         /* Average among active antennas */
3101         if (num_active_rx)
3102                 priv->last_rx_noise = (total_silence / num_active_rx) - 107;
3103         else
3104                 priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
3105
3106         IWL_DEBUG_CALIB("inband silence a %u, b %u, c %u, dBm %d\n",
3107                         bcn_silence_a, bcn_silence_b, bcn_silence_c,
3108                         priv->last_rx_noise);
3109 }
3110
3111 void iwl4965_hw_rx_statistics(struct iwl4965_priv *priv, struct iwl4965_rx_mem_buffer *rxb)
3112 {
3113         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3114         int change;
3115         s32 temp;
3116
3117         IWL_DEBUG_RX("Statistics notification received (%d vs %d).\n",
3118                      (int)sizeof(priv->statistics), pkt->len);
3119
3120         change = ((priv->statistics.general.temperature !=
3121                    pkt->u.stats.general.temperature) ||
3122                   ((priv->statistics.flag &
3123                     STATISTICS_REPLY_FLG_FAT_MODE_MSK) !=
3124                    (pkt->u.stats.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK)));
3125
3126         memcpy(&priv->statistics, &pkt->u.stats, sizeof(priv->statistics));
3127
3128         set_bit(STATUS_STATISTICS, &priv->status);
3129
3130         /* Reschedule the statistics timer to occur in
3131          * REG_RECALIB_PERIOD seconds to ensure we get a
3132          * thermal update even if the uCode doesn't give
3133          * us one */
3134         mod_timer(&priv->statistics_periodic, jiffies +
3135                   msecs_to_jiffies(REG_RECALIB_PERIOD * 1000));
3136
3137         if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
3138             (pkt->hdr.cmd == STATISTICS_NOTIFICATION)) {
3139                 iwl4965_rx_calc_noise(priv);
3140 #ifdef CONFIG_IWL4965_SENSITIVITY
3141                 queue_work(priv->workqueue, &priv->sensitivity_work);
3142 #endif
3143         }
3144
3145         /* If the hardware hasn't reported a change in
3146          * temperature then don't bother computing a
3147          * calibrated temperature value */
3148         if (!change)
3149                 return;
3150
3151         temp = iwl4965_get_temperature(priv);
3152         if (temp < 0)
3153                 return;
3154
3155         if (priv->temperature != temp) {
3156                 if (priv->temperature)
3157                         IWL_DEBUG_TEMP("Temperature changed "
3158                                        "from %dC to %dC\n",
3159                                        KELVIN_TO_CELSIUS(priv->temperature),
3160                                        KELVIN_TO_CELSIUS(temp));
3161                 else
3162                         IWL_DEBUG_TEMP("Temperature "
3163                                        "initialized to %dC\n",
3164                                        KELVIN_TO_CELSIUS(temp));
3165         }
3166
3167         priv->temperature = temp;
3168         set_bit(STATUS_TEMPERATURE, &priv->status);
3169
3170         if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
3171                      iwl4965_is_temp_calib_needed(priv))
3172                 queue_work(priv->workqueue, &priv->txpower_work);
3173 }
3174
3175 static void iwl4965_add_radiotap(struct iwl4965_priv *priv,
3176                                  struct sk_buff *skb,
3177                                  struct iwl4965_rx_phy_res *rx_start,
3178                                  struct ieee80211_rx_status *stats,
3179                                  u32 ampdu_status)
3180 {
3181         s8 signal = stats->ssi;
3182         s8 noise = 0;
3183         int rate = stats->rate_idx;
3184         u64 tsf = stats->mactime;
3185         __le16 phy_flags_hw = rx_start->phy_flags;
3186         struct iwl4965_rt_rx_hdr {
3187                 struct ieee80211_radiotap_header rt_hdr;
3188                 __le64 rt_tsf;          /* TSF */
3189                 u8 rt_flags;            /* radiotap packet flags */
3190                 u8 rt_rate;             /* rate in 500kb/s */
3191                 __le16 rt_channelMHz;   /* channel in MHz */
3192                 __le16 rt_chbitmask;    /* channel bitfield */
3193                 s8 rt_dbmsignal;        /* signal in dBm, kluged to signed */
3194                 s8 rt_dbmnoise;
3195                 u8 rt_antenna;          /* antenna number */
3196         } __attribute__ ((packed)) *iwl4965_rt;
3197
3198         /* TODO: We won't have enough headroom for HT frames. Fix it later. */
3199         if (skb_headroom(skb) < sizeof(*iwl4965_rt)) {
3200                 if (net_ratelimit())
3201                         printk(KERN_ERR "not enough headroom [%d] for "
3202                                "radiotap head [%zd]\n",
3203                                skb_headroom(skb), sizeof(*iwl4965_rt));
3204                 return;
3205         }
3206
3207         /* put radiotap header in front of 802.11 header and data */
3208         iwl4965_rt = (void *)skb_push(skb, sizeof(*iwl4965_rt));
3209
3210         /* initialise radiotap header */
3211         iwl4965_rt->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
3212         iwl4965_rt->rt_hdr.it_pad = 0;
3213
3214         /* total header + data */
3215         put_unaligned(cpu_to_le16(sizeof(*iwl4965_rt)),
3216                       &iwl4965_rt->rt_hdr.it_len);
3217
3218         /* Indicate all the fields we add to the radiotap header */
3219         put_unaligned(cpu_to_le32((1 << IEEE80211_RADIOTAP_TSFT) |
3220                                   (1 << IEEE80211_RADIOTAP_FLAGS) |
3221                                   (1 << IEEE80211_RADIOTAP_RATE) |
3222                                   (1 << IEEE80211_RADIOTAP_CHANNEL) |
3223                                   (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL) |
3224                                   (1 << IEEE80211_RADIOTAP_DBM_ANTNOISE) |
3225                                   (1 << IEEE80211_RADIOTAP_ANTENNA)),
3226                       &iwl4965_rt->rt_hdr.it_present);
3227
3228         /* Zero the flags, we'll add to them as we go */
3229         iwl4965_rt->rt_flags = 0;
3230
3231         put_unaligned(cpu_to_le64(tsf), &iwl4965_rt->rt_tsf);
3232
3233         iwl4965_rt->rt_dbmsignal = signal;
3234         iwl4965_rt->rt_dbmnoise = noise;
3235
3236         /* Convert the channel frequency and set the flags */
3237         put_unaligned(cpu_to_le16(stats->freq), &iwl4965_rt->rt_channelMHz);
3238         if (!(phy_flags_hw & RX_RES_PHY_FLAGS_BAND_24_MSK))
3239                 put_unaligned(cpu_to_le16(IEEE80211_CHAN_OFDM |
3240                                           IEEE80211_CHAN_5GHZ),
3241                               &iwl4965_rt->rt_chbitmask);
3242         else if (phy_flags_hw & RX_RES_PHY_FLAGS_MOD_CCK_MSK)
3243                 put_unaligned(cpu_to_le16(IEEE80211_CHAN_CCK |
3244                                           IEEE80211_CHAN_2GHZ),
3245                               &iwl4965_rt->rt_chbitmask);
3246         else    /* 802.11g */
3247                 put_unaligned(cpu_to_le16(IEEE80211_CHAN_OFDM |
3248                                           IEEE80211_CHAN_2GHZ),
3249                               &iwl4965_rt->rt_chbitmask);
3250
3251         if (rate == -1)
3252                 iwl4965_rt->rt_rate = 0;
3253         else
3254                 iwl4965_rt->rt_rate = iwl4965_rates[rate].ieee;
3255
3256         /*
3257          * "antenna number"
3258          *
3259          * It seems that the antenna field in the phy flags value
3260          * is actually a bitfield. This is undefined by radiotap,
3261          * it wants an actual antenna number but I always get "7"
3262          * for most legacy frames I receive indicating that the
3263          * same frame was received on all three RX chains.
3264          *
3265          * I think this field should be removed in favour of a
3266          * new 802.11n radiotap field "RX chains" that is defined
3267          * as a bitmask.
3268          */
3269         iwl4965_rt->rt_antenna =
3270                 le16_to_cpu(phy_flags_hw & RX_RES_PHY_FLAGS_ANTENNA_MSK) >> 4;
3271
3272         /* set the preamble flag if appropriate */
3273         if (phy_flags_hw & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
3274                 iwl4965_rt->rt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;
3275
3276         stats->flag |= RX_FLAG_RADIOTAP;
3277 }
3278
3279 static void iwl4965_handle_data_packet(struct iwl4965_priv *priv, int is_data,
3280                                        int include_phy,
3281                                        struct iwl4965_rx_mem_buffer *rxb,
3282                                        struct ieee80211_rx_status *stats)
3283 {
3284         struct iwl4965_rx_packet *pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
3285         struct iwl4965_rx_phy_res *rx_start = (include_phy) ?
3286             (struct iwl4965_rx_phy_res *)&(pkt->u.raw[0]) : NULL;
3287         struct ieee80211_hdr *hdr;
3288         u16 len;
3289         __le32 *rx_end;
3290         unsigned int skblen;
3291         u32 ampdu_status;
3292
3293         if (!include_phy && priv->last_phy_res[0])
3294                 rx_start = (struct iwl4965_rx_phy_res *)&priv->last_phy_res[1];
3295
3296         if (!rx_start) {
3297                 IWL_ERROR("MPDU frame without a PHY data\n");
3298                 return;
3299         }
3300         if (include_phy) {
3301                 hdr = (struct ieee80211_hdr *)((u8 *) & rx_start[1] +
3302                                                rx_start->cfg_phy_cnt);
3303
3304                 len = le16_to_cpu(rx_start->byte_count);
3305
3306                 rx_end = (__le32 *) ((u8 *) & pkt->u.raw[0] +
3307                                   sizeof(struct iwl4965_rx_phy_res) +
3308                                   rx_start->cfg_phy_cnt + len);
3309
3310         } else {
3311                 struct iwl4965_rx_mpdu_res_start *amsdu =
3312                     (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw;
3313
3314                 hdr = (struct ieee80211_hdr *)(pkt->u.raw +
3315                                sizeof(struct iwl4965_rx_mpdu_res_start));
3316                 len =  le16_to_cpu(amsdu->byte_count);
3317                 rx_start->byte_count = amsdu->byte_count;
3318                 rx_end = (__le32 *) (((u8 *) hdr) + len);
3319         }
3320         if (len > priv->hw_setting.max_pkt_size || len < 16) {
3321                 IWL_WARNING("byte count out of range [16,4K] : %d\n", len);
3322                 return;
3323         }
3324
3325         ampdu_status = le32_to_cpu(*rx_end);
3326         skblen = ((u8 *) rx_end - (u8 *) & pkt->u.raw[0]) + sizeof(u32);
3327
3328         /* start from MAC */
3329         skb_reserve(rxb->skb, (void *)hdr - (void *)pkt);
3330         skb_put(rxb->skb, len); /* end where data ends */
3331
3332         /* We only process data packets if the interface is open */
3333         if (unlikely(!priv->is_open)) {
3334                 IWL_DEBUG_DROP_LIMIT
3335                     ("Dropping packet while interface is not open.\n");
3336                 return;
3337         }
3338
3339         stats->flag = 0;
3340         hdr = (struct ieee80211_hdr *)rxb->skb->data;
3341
3342         if (iwl4965_param_hwcrypto)
3343                 iwl4965_set_decrypted_flag(priv, rxb->skb, ampdu_status, stats);
3344
3345         if (priv->add_radiotap)
3346                 iwl4965_add_radiotap(priv, rxb->skb, rx_start, stats, ampdu_status);
3347
3348         ieee80211_rx_irqsafe(priv->hw, rxb->skb, stats);
3349         priv->alloc_rxb_skb--;
3350         rxb->skb = NULL;
3351 #ifdef LED
3352         priv->led_packets += len;
3353         iwl4965_setup_activity_timer(priv);
3354 #endif
3355 }
3356
3357 /* Calc max signal level (dBm) among 3 possible receivers */
3358 static int iwl4965_calc_rssi(struct iwl4965_rx_phy_res *rx_resp)
3359 {
3360         /* data from PHY/DSP regarding signal strength, etc.,
3361          *   contents are always there, not configurable by host.  */
3362         struct iwl4965_rx_non_cfg_phy *ncphy =
3363             (struct iwl4965_rx_non_cfg_phy *)rx_resp->non_cfg_phy;
3364         u32 agc = (le16_to_cpu(ncphy->agc_info) & IWL_AGC_DB_MASK)
3365                         >> IWL_AGC_DB_POS;
3366
3367         u32 valid_antennae =
3368             (le16_to_cpu(rx_resp->phy_flags) & RX_PHY_FLAGS_ANTENNAE_MASK)
3369                         >> RX_PHY_FLAGS_ANTENNAE_OFFSET;
3370         u8 max_rssi = 0;
3371         u32 i;
3372
3373         /* Find max rssi among 3 possible receivers.
3374          * These values are measured by the digital signal processor (DSP).
3375          * They should stay fairly constant even as the signal strength varies,
3376          *   if the radio's automatic gain control (AGC) is working right.
3377          * AGC value (see below) will provide the "interesting" info. */
3378         for (i = 0; i < 3; i++)
3379                 if (valid_antennae & (1 << i))
3380                         max_rssi = max(ncphy->rssi_info[i << 1], max_rssi);
3381
3382         IWL_DEBUG_STATS("Rssi In A %d B %d C %d Max %d AGC dB %d\n",
3383                 ncphy->rssi_info[0], ncphy->rssi_info[2], ncphy->rssi_info[4],
3384                 max_rssi, agc);
3385
3386         /* dBm = max_rssi dB - agc dB - constant.
3387          * Higher AGC (higher radio gain) means lower signal. */
3388         return (max_rssi - agc - IWL_RSSI_OFFSET);
3389 }
3390
3391 #ifdef CONFIG_IWL4965_HT
3392
3393 /* Parsed Information Elements */
3394 struct ieee802_11_elems {
3395         u8 *ds_params;
3396         u8 ds_params_len;
3397         u8 *tim;
3398         u8 tim_len;
3399         u8 *ibss_params;
3400         u8 ibss_params_len;
3401         u8 *erp_info;
3402         u8 erp_info_len;
3403         u8 *ht_cap_param;
3404         u8 ht_cap_param_len;
3405         u8 *ht_extra_param;
3406         u8 ht_extra_param_len;
3407 };
3408
3409 static int parse_elems(u8 *start, size_t len, struct ieee802_11_elems *elems)
3410 {
3411         size_t left = len;
3412         u8 *pos = start;
3413         int unknown = 0;
3414
3415         memset(elems, 0, sizeof(*elems));
3416
3417         while (left >= 2) {
3418                 u8 id, elen;
3419
3420                 id = *pos++;
3421                 elen = *pos++;
3422                 left -= 2;
3423
3424                 if (elen > left)
3425                         return -1;
3426
3427                 switch (id) {
3428                 case WLAN_EID_DS_PARAMS:
3429                         elems->ds_params = pos;
3430                         elems->ds_params_len = elen;
3431                         break;
3432                 case WLAN_EID_TIM:
3433                         elems->tim = pos;
3434                         elems->tim_len = elen;
3435                         break;
3436                 case WLAN_EID_IBSS_PARAMS:
3437                         elems->ibss_params = pos;
3438                         elems->ibss_params_len = elen;
3439                         break;
3440                 case WLAN_EID_ERP_INFO:
3441                         elems->erp_info = pos;
3442                         elems->erp_info_len = elen;
3443                         break;
3444                 case WLAN_EID_HT_CAPABILITY:
3445                         elems->ht_cap_param = pos;
3446                         elems->ht_cap_param_len = elen;
3447                         break;
3448                 case WLAN_EID_HT_EXTRA_INFO:
3449                         elems->ht_extra_param = pos;
3450                         elems->ht_extra_param_len = elen;
3451                         break;
3452                 default:
3453                         unknown++;
3454                         break;
3455                 }
3456
3457                 left -= elen;
3458                 pos += elen;
3459         }
3460
3461         return 0;
3462 }
3463
3464 void iwl4965_init_ht_hw_capab(struct ieee80211_ht_info *ht_info,
3465                               enum ieee80211_band band)
3466 {
3467         ht_info->cap = 0;
3468         memset(ht_info->supp_mcs_set, 0, 16);
3469
3470         ht_info->ht_supported = 1;
3471
3472         if (band == IEEE80211_BAND_5GHZ) {
3473                 ht_info->cap |= (u16)IEEE80211_HT_CAP_SUP_WIDTH;
3474                 ht_info->cap |= (u16)IEEE80211_HT_CAP_SGI_40;
3475                 ht_info->supp_mcs_set[4] = 0x01;
3476         }
3477         ht_info->cap |= (u16)IEEE80211_HT_CAP_GRN_FLD;
3478         ht_info->cap |= (u16)IEEE80211_HT_CAP_SGI_20;
3479         ht_info->cap |= (u16)(IEEE80211_HT_CAP_MIMO_PS &
3480                              (IWL_MIMO_PS_NONE << 2));
3481         if (iwl4965_param_amsdu_size_8K) {
3482                 printk(KERN_DEBUG "iwl4965 in A-MSDU 8K support mode\n");
3483                 ht_info->cap |= (u16)IEEE80211_HT_CAP_MAX_AMSDU;
3484         }
3485
3486         ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
3487         ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
3488
3489         ht_info->supp_mcs_set[0] = 0xFF;
3490         ht_info->supp_mcs_set[1] = 0xFF;
3491 }
3492 #endif /* CONFIG_IWL4965_HT */
3493
3494 static void iwl4965_sta_modify_ps_wake(struct iwl4965_priv *priv, int sta_id)
3495 {
3496         unsigned long flags;
3497
3498         spin_lock_irqsave(&priv->sta_lock, flags);
3499         priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
3500         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
3501         priv->stations[sta_id].sta.sta.modify_mask = 0;
3502         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3503         spin_unlock_irqrestore(&priv->sta_lock, flags);
3504
3505         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
3506 }
3507
3508 static void iwl4965_update_ps_mode(struct iwl4965_priv *priv, u16 ps_bit, u8 *addr)
3509 {
3510         /* FIXME: need locking over ps_status ??? */
3511         u8 sta_id = iwl4965_hw_find_station(priv, addr);
3512
3513         if (sta_id != IWL_INVALID_STATION) {
3514                 u8 sta_awake = priv->stations[sta_id].
3515                                 ps_status == STA_PS_STATUS_WAKE;
3516
3517                 if (sta_awake && ps_bit)
3518                         priv->stations[sta_id].ps_status = STA_PS_STATUS_SLEEP;
3519                 else if (!sta_awake && !ps_bit) {
3520                         iwl4965_sta_modify_ps_wake(priv, sta_id);
3521                         priv->stations[sta_id].ps_status = STA_PS_STATUS_WAKE;
3522                 }
3523         }
3524 }
3525
3526 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
3527
3528 /* Called for REPLY_4965_RX (legacy ABG frames), or
3529  * REPLY_RX_MPDU_CMD (HT high-throughput N frames). */
3530 static void iwl4965_rx_reply_rx(struct iwl4965_priv *priv,
3531                                 struct iwl4965_rx_mem_buffer *rxb)
3532 {
3533         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3534         /* Use phy data (Rx signal strength, etc.) contained within
3535          *   this rx packet for legacy frames,
3536          *   or phy data cached from REPLY_RX_PHY_CMD for HT frames. */
3537         int include_phy = (pkt->hdr.cmd == REPLY_4965_RX);
3538         struct iwl4965_rx_phy_res *rx_start = (include_phy) ?
3539                 (struct iwl4965_rx_phy_res *)&(pkt->u.raw[0]) :
3540                 (struct iwl4965_rx_phy_res *)&priv->last_phy_res[1];
3541         __le32 *rx_end;
3542         unsigned int len = 0;
3543         struct ieee80211_hdr *header;
3544         u16 fc;
3545         struct ieee80211_rx_status stats = {
3546                 .mactime = le64_to_cpu(rx_start->timestamp),
3547                 .freq = ieee80211chan2mhz(le16_to_cpu(rx_start->channel)),
3548                 .band =
3549                         (rx_start->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ?
3550                         IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ,
3551                 .antenna = 0,
3552                 .rate_idx = iwl4965_rate_index_from_plcp(
3553                                 le32_to_cpu(rx_start->rate_n_flags)),
3554                 .flag = 0,
3555         };
3556         u8 network_packet;
3557
3558         if ((unlikely(rx_start->cfg_phy_cnt > 20))) {
3559                 IWL_DEBUG_DROP
3560                         ("dsp size out of range [0,20]: "
3561                          "%d/n", rx_start->cfg_phy_cnt);
3562                 return;
3563         }
3564         if (!include_phy) {
3565                 if (priv->last_phy_res[0])
3566                         rx_start = (struct iwl4965_rx_phy_res *)
3567                                 &priv->last_phy_res[1];
3568                 else
3569                         rx_start = NULL;
3570         }
3571
3572         if (!rx_start) {
3573                 IWL_ERROR("MPDU frame without a PHY data\n");
3574                 return;
3575         }
3576
3577         if (include_phy) {
3578                 header = (struct ieee80211_hdr *)((u8 *) & rx_start[1]
3579                                                   + rx_start->cfg_phy_cnt);
3580
3581                 len = le16_to_cpu(rx_start->byte_count);
3582                 rx_end = (__le32 *) (pkt->u.raw + rx_start->cfg_phy_cnt +
3583                                   sizeof(struct iwl4965_rx_phy_res) + len);
3584         } else {
3585                 struct iwl4965_rx_mpdu_res_start *amsdu =
3586                         (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw;
3587
3588                 header = (void *)(pkt->u.raw +
3589                         sizeof(struct iwl4965_rx_mpdu_res_start));
3590                 len = le16_to_cpu(amsdu->byte_count);
3591                 rx_end = (__le32 *) (pkt->u.raw +
3592                         sizeof(struct iwl4965_rx_mpdu_res_start) + len);
3593         }
3594
3595         if (!(*rx_end & RX_RES_STATUS_NO_CRC32_ERROR) ||
3596             !(*rx_end & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
3597                 IWL_DEBUG_RX("Bad CRC or FIFO: 0x%08X.\n",
3598                                 le32_to_cpu(*rx_end));
3599                 return;
3600         }
3601
3602         priv->ucode_beacon_time = le32_to_cpu(rx_start->beacon_time_stamp);
3603
3604         /* Find max signal strength (dBm) among 3 antenna/receiver chains */
3605         stats.ssi = iwl4965_calc_rssi(rx_start);
3606
3607         /* Meaningful noise values are available only from beacon statistics,
3608          *   which are gathered only when associated, and indicate noise
3609          *   only for the associated network channel ...
3610          * Ignore these noise values while scanning (other channels) */
3611         if (iwl4965_is_associated(priv) &&
3612             !test_bit(STATUS_SCANNING, &priv->status)) {
3613                 stats.noise = priv->last_rx_noise;
3614                 stats.signal = iwl4965_calc_sig_qual(stats.ssi, stats.noise);
3615         } else {
3616                 stats.noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
3617                 stats.signal = iwl4965_calc_sig_qual(stats.ssi, 0);
3618         }
3619
3620         /* Reset beacon noise level if not associated. */
3621         if (!iwl4965_is_associated(priv))
3622                 priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
3623
3624 #ifdef CONFIG_IWL4965_DEBUG
3625         /* TODO:  Parts of iwl4965_report_frame are broken for 4965 */
3626         if (iwl4965_debug_level & (IWL_DL_RX))
3627                 /* Set "1" to report good data frames in groups of 100 */
3628                 iwl4965_report_frame(priv, pkt, header, 1);
3629
3630         if (iwl4965_debug_level & (IWL_DL_RX | IWL_DL_STATS))
3631         IWL_DEBUG_RX("Rssi %d, noise %d, qual %d, TSF %lu\n",
3632                 stats.ssi, stats.noise, stats.signal,
3633                  (long unsigned int)le64_to_cpu(rx_start->timestamp));
3634 #endif
3635
3636         network_packet = iwl4965_is_network_packet(priv, header);
3637         if (network_packet) {
3638                 priv->last_rx_rssi = stats.ssi;
3639                 priv->last_beacon_time =  priv->ucode_beacon_time;
3640                 priv->last_tsf = le64_to_cpu(rx_start->timestamp);
3641         }
3642
3643         fc = le16_to_cpu(header->frame_control);
3644         switch (fc & IEEE80211_FCTL_FTYPE) {
3645         case IEEE80211_FTYPE_MGMT:
3646
3647                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
3648                         iwl4965_update_ps_mode(priv, fc  & IEEE80211_FCTL_PM,
3649                                                 header->addr2);
3650                 switch (fc & IEEE80211_FCTL_STYPE) {
3651                 case IEEE80211_STYPE_PROBE_RESP:
3652                 case IEEE80211_STYPE_BEACON:
3653                         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA &&
3654                              !compare_ether_addr(header->addr2, priv->bssid)) ||
3655                             (priv->iw_mode == IEEE80211_IF_TYPE_IBSS &&
3656                              !compare_ether_addr(header->addr3, priv->bssid))) {
3657                                 struct ieee80211_mgmt *mgmt =
3658                                         (struct ieee80211_mgmt *)header;
3659                                 u64 timestamp =
3660                                         le64_to_cpu(mgmt->u.beacon.timestamp);
3661
3662                                 priv->timestamp0 = timestamp & 0xFFFFFFFF;
3663                                 priv->timestamp1 =
3664                                         (timestamp >> 32) & 0xFFFFFFFF;
3665                                 priv->beacon_int = le16_to_cpu(
3666                                     mgmt->u.beacon.beacon_int);
3667                                 if (priv->call_post_assoc_from_beacon &&
3668                                     (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
3669                                         priv->call_post_assoc_from_beacon = 0;
3670                                         queue_work(priv->workqueue,
3671                                             &priv->post_associate.work);
3672                                 }
3673                         }
3674                         break;
3675
3676                 case IEEE80211_STYPE_ACTION:
3677                         break;
3678
3679                         /*
3680                          * TODO: Use the new callback function from
3681                          * mac80211 instead of sniffing these packets.
3682                          */
3683                 case IEEE80211_STYPE_ASSOC_RESP:
3684                 case IEEE80211_STYPE_REASSOC_RESP:
3685                         if (network_packet) {
3686 #ifdef CONFIG_IWL4965_HT
3687                                 u8 *pos = NULL;
3688                                 struct ieee802_11_elems elems;
3689 #endif                          /*CONFIG_IWL4965_HT */
3690                                 struct ieee80211_mgmt *mgnt =
3691                                         (struct ieee80211_mgmt *)header;
3692
3693                                 /* We have just associated, give some
3694                                  * time for the 4-way handshake if
3695                                  * any. Don't start scan too early. */
3696                                 priv->next_scan_jiffies = jiffies +
3697                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
3698
3699                                 priv->assoc_id = (~((1 << 15) | (1 << 14))
3700                                         & le16_to_cpu(mgnt->u.assoc_resp.aid));
3701                                 priv->assoc_capability =
3702                                         le16_to_cpu(
3703                                                 mgnt->u.assoc_resp.capab_info);
3704 #ifdef CONFIG_IWL4965_HT
3705                                 pos = mgnt->u.assoc_resp.variable;
3706                                 if (!parse_elems(pos,
3707                                                  len - (pos - (u8 *) mgnt),
3708                                                  &elems)) {
3709                                         if (elems.ht_extra_param &&
3710                                             elems.ht_cap_param)
3711                                                 break;
3712                                 }
3713 #endif                          /*CONFIG_IWL4965_HT */
3714                                 /* assoc_id is 0 no association */
3715                                 if (!priv->assoc_id)
3716                                         break;
3717                                 if (priv->beacon_int)
3718                                         queue_work(priv->workqueue,
3719                                             &priv->post_associate.work);
3720                                 else
3721                                         priv->call_post_assoc_from_beacon = 1;
3722                         }
3723
3724                         break;
3725
3726                 case IEEE80211_STYPE_PROBE_REQ:
3727                         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
3728                             !iwl4965_is_associated(priv)) {
3729                                 DECLARE_MAC_BUF(mac1);
3730                                 DECLARE_MAC_BUF(mac2);
3731                                 DECLARE_MAC_BUF(mac3);
3732
3733                                 IWL_DEBUG_DROP("Dropping (non network): "
3734                                                "%s, %s, %s\n",
3735                                                print_mac(mac1, header->addr1),
3736                                                print_mac(mac2, header->addr2),
3737                                                print_mac(mac3, header->addr3));
3738                                 return;
3739                         }
3740                 }
3741                 iwl4965_handle_data_packet(priv, 0, include_phy, rxb, &stats);
3742                 break;
3743
3744         case IEEE80211_FTYPE_CTL:
3745 #ifdef CONFIG_IWL4965_HT
3746                 switch (fc & IEEE80211_FCTL_STYPE) {
3747                 case IEEE80211_STYPE_BACK_REQ:
3748                         IWL_DEBUG_HT("IEEE80211_STYPE_BACK_REQ arrived\n");
3749                         iwl4965_handle_data_packet(priv, 0, include_phy,
3750                                                 rxb, &stats);
3751                         break;
3752                 default:
3753                         break;
3754                 }
3755 #endif
3756                 break;
3757
3758         case IEEE80211_FTYPE_DATA: {
3759                 DECLARE_MAC_BUF(mac1);
3760                 DECLARE_MAC_BUF(mac2);
3761                 DECLARE_MAC_BUF(mac3);
3762
3763                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
3764                         iwl4965_update_ps_mode(priv, fc  & IEEE80211_FCTL_PM,
3765                                                 header->addr2);
3766
3767                 if (unlikely(!network_packet))
3768                         IWL_DEBUG_DROP("Dropping (non network): "
3769                                        "%s, %s, %s\n",
3770                                        print_mac(mac1, header->addr1),
3771                                        print_mac(mac2, header->addr2),
3772                                        print_mac(mac3, header->addr3));
3773                 else if (unlikely(iwl4965_is_duplicate_packet(priv, header)))
3774                         IWL_DEBUG_DROP("Dropping (dup): %s, %s, %s\n",
3775                                        print_mac(mac1, header->addr1),
3776                                        print_mac(mac2, header->addr2),
3777                                        print_mac(mac3, header->addr3));
3778                 else
3779                         iwl4965_handle_data_packet(priv, 1, include_phy, rxb,
3780                                                    &stats);
3781                 break;
3782         }
3783         default:
3784                 break;
3785
3786         }
3787 }
3788
3789 /* Cache phy data (Rx signal strength, etc) for HT frame (REPLY_RX_PHY_CMD).
3790  * This will be used later in iwl4965_rx_reply_rx() for REPLY_RX_MPDU_CMD. */
3791 static void iwl4965_rx_reply_rx_phy(struct iwl4965_priv *priv,
3792                                     struct iwl4965_rx_mem_buffer *rxb)
3793 {
3794         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3795         priv->last_phy_res[0] = 1;
3796         memcpy(&priv->last_phy_res[1], &(pkt->u.raw[0]),
3797                sizeof(struct iwl4965_rx_phy_res));
3798 }
3799
3800 static void iwl4965_rx_missed_beacon_notif(struct iwl4965_priv *priv,
3801                                            struct iwl4965_rx_mem_buffer *rxb)
3802
3803 {
3804 #ifdef CONFIG_IWL4965_SENSITIVITY
3805         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3806         struct iwl4965_missed_beacon_notif *missed_beacon;
3807
3808         missed_beacon = &pkt->u.missed_beacon;
3809         if (le32_to_cpu(missed_beacon->consequtive_missed_beacons) > 5) {
3810                 IWL_DEBUG_CALIB("missed bcn cnsq %d totl %d rcd %d expctd %d\n",
3811                     le32_to_cpu(missed_beacon->consequtive_missed_beacons),
3812                     le32_to_cpu(missed_beacon->total_missed_becons),
3813                     le32_to_cpu(missed_beacon->num_recvd_beacons),
3814                     le32_to_cpu(missed_beacon->num_expected_beacons));
3815                 priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
3816                 if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)))
3817                         queue_work(priv->workqueue, &priv->sensitivity_work);
3818         }
3819 #endif /*CONFIG_IWL4965_SENSITIVITY*/
3820 }
3821
3822 #ifdef CONFIG_IWL4965_HT
3823
3824 /**
3825  * iwl4965_sta_modify_enable_tid_tx - Enable Tx for this TID in station table
3826  */
3827 static void iwl4965_sta_modify_enable_tid_tx(struct iwl4965_priv *priv,
3828                                          int sta_id, int tid)
3829 {
3830         unsigned long flags;
3831
3832         /* Remove "disable" flag, to enable Tx for this TID */
3833         spin_lock_irqsave(&priv->sta_lock, flags);
3834         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
3835         priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
3836         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3837         spin_unlock_irqrestore(&priv->sta_lock, flags);
3838
3839         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
3840 }
3841
3842 /**
3843  * iwl4965_tx_status_reply_compressed_ba - Update tx status from block-ack
3844  *
3845  * Go through block-ack's bitmap of ACK'd frames, update driver's record of
3846  * ACK vs. not.  This gets sent to mac80211, then to rate scaling algo.
3847  */
3848 static int iwl4965_tx_status_reply_compressed_ba(struct iwl4965_priv *priv,
3849                                                  struct iwl4965_ht_agg *agg,
3850                                                  struct iwl4965_compressed_ba_resp*
3851                                                  ba_resp)
3852
3853 {
3854         int i, sh, ack;
3855         u16 seq_ctl = le16_to_cpu(ba_resp->seq_ctl);
3856         u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
3857         u64 bitmap;
3858         int successes = 0;
3859         struct ieee80211_tx_status *tx_status;
3860
3861         if (unlikely(!agg->wait_for_ba))  {
3862                 IWL_ERROR("Received BA when not expected\n");
3863                 return -EINVAL;
3864         }
3865
3866         /* Mark that the expected block-ack response arrived */
3867         agg->wait_for_ba = 0;
3868         IWL_DEBUG_TX_REPLY("BA %d %d\n", agg->start_idx, ba_resp->seq_ctl);
3869
3870         /* Calculate shift to align block-ack bits with our Tx window bits */
3871         sh = agg->start_idx - SEQ_TO_INDEX(seq_ctl>>4);
3872         if (sh < 0) /* tbw something is wrong with indices */
3873                 sh += 0x100;
3874
3875         /* don't use 64-bit values for now */
3876         bitmap = le64_to_cpu(ba_resp->bitmap) >> sh;
3877
3878         if (agg->frame_count > (64 - sh)) {
3879                 IWL_DEBUG_TX_REPLY("more frames than bitmap size");
3880                 return -1;
3881         }
3882
3883         /* check for success or failure according to the
3884          * transmitted bitmap and block-ack bitmap */
3885         bitmap &= agg->bitmap;
3886
3887         /* For each frame attempted in aggregation,
3888          * update driver's record of tx frame's status. */
3889         for (i = 0; i < agg->frame_count ; i++) {
3890                 ack = bitmap & (1 << i);
3891                 successes += !!ack;
3892                 IWL_DEBUG_TX_REPLY("%s ON i=%d idx=%d raw=%d\n",
3893                         ack? "ACK":"NACK", i, (agg->start_idx + i) & 0xff,
3894                         agg->start_idx + i);
3895         }
3896
3897         tx_status = &priv->txq[scd_flow].txb[agg->start_idx].status;
3898         tx_status->flags = IEEE80211_TX_STATUS_ACK;
3899         tx_status->flags |= IEEE80211_TX_STATUS_AMPDU;
3900         tx_status->ampdu_ack_map = successes;
3901         tx_status->ampdu_ack_len = agg->frame_count;
3902         /* FIXME Wrong rate
3903         tx_status->control.tx_rate = agg->rate_n_flags;
3904         */
3905
3906         IWL_DEBUG_TX_REPLY("Bitmap %llx\n", bitmap);
3907
3908         return 0;
3909 }
3910
3911 /**
3912  * iwl4965_tx_queue_stop_scheduler - Stop queue, but keep configuration
3913  */
3914 static void iwl4965_tx_queue_stop_scheduler(struct iwl4965_priv *priv,
3915                                             u16 txq_id)
3916 {
3917         /* Simply stop the queue, but don't change any configuration;
3918          * the SCD_ACT_EN bit is the write-enable mask for the ACTIVE bit. */
3919         iwl4965_write_prph(priv,
3920                 KDR_SCD_QUEUE_STATUS_BITS(txq_id),
3921                 (0 << SCD_QUEUE_STTS_REG_POS_ACTIVE)|
3922                 (1 << SCD_QUEUE_STTS_REG_POS_SCD_ACT_EN));
3923 }
3924
3925 /**
3926  * txq_id must be greater than IWL_BACK_QUEUE_FIRST_ID
3927  */
3928 static int iwl4965_tx_queue_agg_disable(struct iwl4965_priv *priv, u16 txq_id,
3929                                         u16 ssn_idx, u8 tx_fifo)
3930 {
3931         if (IWL_BACK_QUEUE_FIRST_ID > txq_id) {
3932                 IWL_WARNING("queue number too small: %d, must be > %d\n",
3933                                 txq_id, IWL_BACK_QUEUE_FIRST_ID);
3934                 return -EINVAL;
3935         }
3936
3937         iwl4965_tx_queue_stop_scheduler(priv, txq_id);
3938
3939         iwl4965_clear_bits_prph(priv, KDR_SCD_QUEUECHAIN_SEL, (1 << txq_id));
3940
3941         priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
3942         priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
3943         /* supposes that ssn_idx is valid (!= 0xFFF) */
3944         iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
3945
3946         iwl4965_clear_bits_prph(priv, KDR_SCD_INTERRUPT_MASK, (1 << txq_id));
3947         iwl4965_txq_ctx_deactivate(priv, txq_id);
3948         iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 0);
3949
3950         return 0;
3951 }
3952
3953 int iwl4965_check_empty_hw_queue(struct iwl4965_priv *priv, int sta_id,
3954                                          u8 tid, int txq_id)
3955 {
3956         struct iwl4965_queue *q = &priv->txq[txq_id].q;
3957         u8 *addr = priv->stations[sta_id].sta.sta.addr;
3958         struct iwl4965_tid_data *tid_data = &priv->stations[sta_id].tid[tid];
3959
3960         switch (priv->stations[sta_id].tid[tid].agg.state) {
3961         case IWL_EMPTYING_HW_QUEUE_DELBA:
3962                 /* We are reclaiming the last packet of the */
3963                 /* aggregated HW queue */
3964                 if (txq_id  == tid_data->agg.txq_id &&
3965                     q->read_ptr == q->write_ptr) {
3966                         u16 ssn = SEQ_TO_SN(tid_data->seq_number);
3967                         int tx_fifo = default_tid_to_tx_fifo[tid];
3968                         IWL_DEBUG_HT("HW queue empty: continue DELBA flow\n");
3969                         iwl4965_tx_queue_agg_disable(priv, txq_id,
3970                                                      ssn, tx_fifo);
3971                         tid_data->agg.state = IWL_AGG_OFF;
3972                         ieee80211_stop_tx_ba_cb_irqsafe(priv->hw, addr, tid);
3973                 }
3974                 break;
3975         case IWL_EMPTYING_HW_QUEUE_ADDBA:
3976                 /* We are reclaiming the last packet of the queue */
3977                 if (tid_data->tfds_in_queue == 0) {
3978                         IWL_DEBUG_HT("HW queue empty: continue ADDBA flow\n");
3979                         tid_data->agg.state = IWL_AGG_ON;
3980                         ieee80211_start_tx_ba_cb_irqsafe(priv->hw, addr, tid);
3981                 }
3982                 break;
3983         }
3984         return 0;
3985 }
3986
3987 /**
3988  * iwl4965_queue_dec_wrap - Decrement queue index, wrap back to end if needed
3989  * @index -- current index
3990  * @n_bd -- total number of entries in queue (s/b power of 2)
3991  */
3992 static inline int iwl4965_queue_dec_wrap(int index, int n_bd)
3993 {
3994         return (index == 0) ? n_bd - 1 : index - 1;
3995 }
3996
3997 /**
3998  * iwl4965_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
3999  *
4000  * Handles block-acknowledge notification from device, which reports success
4001  * of frames sent via aggregation.
4002  */
4003 static void iwl4965_rx_reply_compressed_ba(struct iwl4965_priv *priv,
4004                                            struct iwl4965_rx_mem_buffer *rxb)
4005 {
4006         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
4007         struct iwl4965_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba;
4008         int index;
4009         struct iwl4965_tx_queue *txq = NULL;
4010         struct iwl4965_ht_agg *agg;
4011         DECLARE_MAC_BUF(mac);
4012
4013         /* "flow" corresponds to Tx queue */
4014         u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
4015
4016         /* "ssn" is start of block-ack Tx window, corresponds to index
4017          * (in Tx queue's circular buffer) of first TFD/frame in window */
4018         u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
4019
4020         if (scd_flow >= ARRAY_SIZE(priv->txq)) {
4021                 IWL_ERROR("BUG_ON scd_flow is bigger than number of queues");
4022                 return;
4023         }
4024
4025         txq = &priv->txq[scd_flow];
4026         agg = &priv->stations[ba_resp->sta_id].tid[ba_resp->tid].agg;
4027
4028         /* Find index just before block-ack window */
4029         index = iwl4965_queue_dec_wrap(ba_resp_scd_ssn & 0xff, txq->q.n_bd);
4030
4031         /* TODO: Need to get this copy more safely - now good for debug */
4032
4033         IWL_DEBUG_TX_REPLY("REPLY_COMPRESSED_BA [%d]Received from %s, "
4034                            "sta_id = %d\n",
4035                            agg->wait_for_ba,
4036                            print_mac(mac, (u8*) &ba_resp->sta_addr_lo32),
4037                            ba_resp->sta_id);
4038         IWL_DEBUG_TX_REPLY("TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = "
4039                            "%d, scd_ssn = %d\n",
4040                            ba_resp->tid,
4041                            ba_resp->seq_ctl,
4042                            ba_resp->bitmap,
4043                            ba_resp->scd_flow,
4044                            ba_resp->scd_ssn);
4045         IWL_DEBUG_TX_REPLY("DAT start_idx = %d, bitmap = 0x%llx \n",
4046                            agg->start_idx,
4047                            agg->bitmap);
4048
4049         /* Update driver's record of ACK vs. not for each frame in window */
4050         iwl4965_tx_status_reply_compressed_ba(priv, agg, ba_resp);
4051
4052         /* Release all TFDs before the SSN, i.e. all TFDs in front of
4053          * block-ack window (we assume that they've been successfully
4054          * transmitted ... if not, it's too late anyway). */
4055         if (txq->q.read_ptr != (ba_resp_scd_ssn & 0xff)) {
4056                 int freed = iwl4965_tx_queue_reclaim(priv, scd_flow, index);
4057                 priv->stations[ba_resp->sta_id].
4058                         tid[ba_resp->tid].tfds_in_queue -= freed;
4059                 if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
4060                         priv->mac80211_registered &&
4061                         agg->state != IWL_EMPTYING_HW_QUEUE_DELBA)
4062                         ieee80211_wake_queue(priv->hw, scd_flow);
4063                 iwl4965_check_empty_hw_queue(priv, ba_resp->sta_id,
4064                         ba_resp->tid, scd_flow);
4065         }
4066 }
4067
4068 /**
4069  * iwl4965_tx_queue_set_q2ratid - Map unique receiver/tid combination to a queue
4070  */
4071 static int iwl4965_tx_queue_set_q2ratid(struct iwl4965_priv *priv, u16 ra_tid,
4072                                         u16 txq_id)
4073 {
4074         u32 tbl_dw_addr;
4075         u32 tbl_dw;
4076         u16 scd_q2ratid;
4077
4078         scd_q2ratid = ra_tid & SCD_QUEUE_RA_TID_MAP_RATID_MSK;
4079
4080         tbl_dw_addr = priv->scd_base_addr +
4081                         SCD_TRANSLATE_TBL_OFFSET_QUEUE(txq_id);
4082
4083         tbl_dw = iwl4965_read_targ_mem(priv, tbl_dw_addr);
4084
4085         if (txq_id & 0x1)
4086                 tbl_dw = (scd_q2ratid << 16) | (tbl_dw & 0x0000FFFF);
4087         else
4088                 tbl_dw = scd_q2ratid | (tbl_dw & 0xFFFF0000);
4089
4090         iwl4965_write_targ_mem(priv, tbl_dw_addr, tbl_dw);
4091
4092         return 0;
4093 }
4094
4095
4096 /**
4097  * iwl4965_tx_queue_agg_enable - Set up & enable aggregation for selected queue
4098  *
4099  * NOTE:  txq_id must be greater than IWL_BACK_QUEUE_FIRST_ID,
4100  *        i.e. it must be one of the higher queues used for aggregation
4101  */
4102 static int iwl4965_tx_queue_agg_enable(struct iwl4965_priv *priv, int txq_id,
4103                                        int tx_fifo, int sta_id, int tid,
4104                                        u16 ssn_idx)
4105 {
4106         unsigned long flags;
4107         int rc;
4108         u16 ra_tid;
4109
4110         if (IWL_BACK_QUEUE_FIRST_ID > txq_id)
4111                 IWL_WARNING("queue number too small: %d, must be > %d\n",
4112                         txq_id, IWL_BACK_QUEUE_FIRST_ID);
4113
4114         ra_tid = BUILD_RAxTID(sta_id, tid);
4115
4116         /* Modify device's station table to Tx this TID */
4117         iwl4965_sta_modify_enable_tid_tx(priv, sta_id, tid);
4118
4119         spin_lock_irqsave(&priv->lock, flags);
4120         rc = iwl4965_grab_nic_access(priv);
4121         if (rc) {
4122                 spin_unlock_irqrestore(&priv->lock, flags);
4123                 return rc;
4124         }
4125
4126         /* Stop this Tx queue before configuring it */
4127         iwl4965_tx_queue_stop_scheduler(priv, txq_id);
4128
4129         /* Map receiver-address / traffic-ID to this queue */
4130         iwl4965_tx_queue_set_q2ratid(priv, ra_tid, txq_id);
4131
4132         /* Set this queue as a chain-building queue */
4133         iwl4965_set_bits_prph(priv, KDR_SCD_QUEUECHAIN_SEL, (1 << txq_id));
4134
4135         /* Place first TFD at index corresponding to start sequence number.
4136          * Assumes that ssn_idx is valid (!= 0xFFF) */
4137         priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
4138         priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
4139         iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
4140
4141         /* Set up Tx window size and frame limit for this queue */
4142         iwl4965_write_targ_mem(priv,
4143                         priv->scd_base_addr + SCD_CONTEXT_QUEUE_OFFSET(txq_id),
4144                         (SCD_WIN_SIZE << SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
4145                         SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
4146
4147         iwl4965_write_targ_mem(priv, priv->scd_base_addr +
4148                         SCD_CONTEXT_QUEUE_OFFSET(txq_id) + sizeof(u32),
4149                         (SCD_FRAME_LIMIT << SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS)
4150                         & SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
4151
4152         iwl4965_set_bits_prph(priv, KDR_SCD_INTERRUPT_MASK, (1 << txq_id));
4153
4154         /* Set up Status area in SRAM, map to Tx DMA/FIFO, activate the queue */
4155         iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 1);
4156
4157         iwl4965_release_nic_access(priv);
4158         spin_unlock_irqrestore(&priv->lock, flags);
4159
4160         return 0;
4161 }
4162
4163 #endif /* CONFIG_IWL4965_HT */
4164
4165 /**
4166  * iwl4965_add_station - Initialize a station's hardware rate table
4167  *
4168  * The uCode's station table contains a table of fallback rates
4169  * for automatic fallback during transmission.
4170  *
4171  * NOTE: This sets up a default set of values.  These will be replaced later
4172  *       if the driver's iwl-4965-rs rate scaling algorithm is used, instead of
4173  *       rc80211_simple.
4174  *
4175  * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
4176  *       calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
4177  *       which requires station table entry to exist).
4178  */
4179 void iwl4965_add_station(struct iwl4965_priv *priv, const u8 *addr, int is_ap)
4180 {
4181         int i, r;
4182         struct iwl4965_link_quality_cmd link_cmd = {
4183                 .reserved1 = 0,
4184         };
4185         u16 rate_flags;
4186
4187         /* Set up the rate scaling to start at selected rate, fall back
4188          * all the way down to 1M in IEEE order, and then spin on 1M */
4189         if (is_ap)
4190                 r = IWL_RATE_54M_INDEX;
4191         else if (priv->band == IEEE80211_BAND_5GHZ)
4192                 r = IWL_RATE_6M_INDEX;
4193         else
4194                 r = IWL_RATE_1M_INDEX;
4195
4196         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
4197                 rate_flags = 0;
4198                 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
4199                         rate_flags |= RATE_MCS_CCK_MSK;
4200
4201                 /* Use Tx antenna B only */
4202                 rate_flags |= RATE_MCS_ANT_B_MSK;
4203                 rate_flags &= ~RATE_MCS_ANT_A_MSK;
4204
4205                 link_cmd.rs_table[i].rate_n_flags =
4206                         iwl4965_hw_set_rate_n_flags(iwl4965_rates[r].plcp, rate_flags);
4207                 r = iwl4965_get_prev_ieee_rate(r);
4208         }
4209
4210         link_cmd.general_params.single_stream_ant_msk = 2;
4211         link_cmd.general_params.dual_stream_ant_msk = 3;
4212         link_cmd.agg_params.agg_dis_start_th = 3;
4213         link_cmd.agg_params.agg_time_limit = cpu_to_le16(4000);
4214
4215         /* Update the rate scaling for control frame Tx to AP */
4216         link_cmd.sta_id = is_ap ? IWL_AP_ID : IWL4965_BROADCAST_ID;
4217
4218         iwl4965_send_cmd_pdu(priv, REPLY_TX_LINK_QUALITY_CMD, sizeof(link_cmd),
4219                          &link_cmd);
4220 }
4221
4222 #ifdef CONFIG_IWL4965_HT
4223
4224 static u8 iwl4965_is_channel_extension(struct iwl4965_priv *priv,
4225                                        enum ieee80211_band band,
4226                                        u16 channel, u8 extension_chan_offset)
4227 {
4228         const struct iwl4965_channel_info *ch_info;
4229
4230         ch_info = iwl4965_get_channel_info(priv, band, channel);
4231         if (!is_channel_valid(ch_info))
4232                 return 0;
4233
4234         if (extension_chan_offset == IWL_EXT_CHANNEL_OFFSET_AUTO)
4235                 return 0;
4236
4237         if ((ch_info->fat_extension_channel == extension_chan_offset) ||
4238             (ch_info->fat_extension_channel == HT_IE_EXT_CHANNEL_MAX))
4239                 return 1;
4240
4241         return 0;
4242 }
4243
4244 static u8 iwl4965_is_fat_tx_allowed(struct iwl4965_priv *priv,
4245                                 struct ieee80211_ht_info *sta_ht_inf)
4246 {
4247         struct iwl_ht_info *iwl_ht_conf = &priv->current_ht_config;
4248
4249         if ((!iwl_ht_conf->is_ht) ||
4250            (iwl_ht_conf->supported_chan_width != IWL_CHANNEL_WIDTH_40MHZ) ||
4251            (iwl_ht_conf->extension_chan_offset == IWL_EXT_CHANNEL_OFFSET_AUTO))
4252                 return 0;
4253
4254         if (sta_ht_inf) {
4255                 if ((!sta_ht_inf->ht_supported) ||
4256                    (!(sta_ht_inf->cap & IEEE80211_HT_CAP_SUP_WIDTH)))
4257                         return 0;
4258         }
4259
4260         return (iwl4965_is_channel_extension(priv, priv->band,
4261                                          iwl_ht_conf->control_channel,
4262                                          iwl_ht_conf->extension_chan_offset));
4263 }
4264
4265 void iwl4965_set_rxon_ht(struct iwl4965_priv *priv, struct iwl_ht_info *ht_info)
4266 {
4267         struct iwl4965_rxon_cmd *rxon = &priv->staging_rxon;
4268         u32 val;
4269
4270         if (!ht_info->is_ht)
4271                 return;
4272
4273         /* Set up channel bandwidth:  20 MHz only, or 20/40 mixed if fat ok */
4274         if (iwl4965_is_fat_tx_allowed(priv, NULL))
4275                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED_MSK;
4276         else
4277                 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
4278                                  RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
4279
4280         if (le16_to_cpu(rxon->channel) != ht_info->control_channel) {
4281                 IWL_DEBUG_ASSOC("control diff than current %d %d\n",
4282                                 le16_to_cpu(rxon->channel),
4283                                 ht_info->control_channel);
4284                 rxon->channel = cpu_to_le16(ht_info->control_channel);
4285                 return;
4286         }
4287
4288         /* Note: control channel is opposite of extension channel */
4289         switch (ht_info->extension_chan_offset) {
4290         case IWL_EXT_CHANNEL_OFFSET_ABOVE:
4291                 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
4292                 break;
4293         case IWL_EXT_CHANNEL_OFFSET_BELOW:
4294                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
4295                 break;
4296         case IWL_EXT_CHANNEL_OFFSET_AUTO:
4297                 rxon->flags &= ~RXON_FLG_CHANNEL_MODE_MIXED_MSK;
4298                 break;
4299         default:
4300                 rxon->flags &= ~RXON_FLG_CHANNEL_MODE_MIXED_MSK;
4301                 break;
4302         }
4303
4304         val = ht_info->ht_protection;
4305
4306         rxon->flags |= cpu_to_le32(val << RXON_FLG_HT_OPERATING_MODE_POS);
4307
4308         iwl4965_set_rxon_chain(priv);
4309
4310         IWL_DEBUG_ASSOC("supported HT rate 0x%X %X "
4311                         "rxon flags 0x%X operation mode :0x%X "
4312                         "extension channel offset 0x%x "
4313                         "control chan %d\n",
4314                         ht_info->supp_mcs_set[0], ht_info->supp_mcs_set[1],
4315                         le32_to_cpu(rxon->flags), ht_info->ht_protection,
4316                         ht_info->extension_chan_offset,
4317                         ht_info->control_channel);
4318         return;
4319 }
4320
4321 void iwl4965_set_ht_add_station(struct iwl4965_priv *priv, u8 index,
4322                                 struct ieee80211_ht_info *sta_ht_inf)
4323 {
4324         __le32 sta_flags;
4325         u8 mimo_ps_mode;
4326
4327         if (!sta_ht_inf || !sta_ht_inf->ht_supported)
4328                 goto done;
4329
4330         mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2;
4331
4332         sta_flags = priv->stations[index].sta.station_flags;
4333
4334         sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
4335
4336         switch (mimo_ps_mode) {
4337         case WLAN_HT_CAP_MIMO_PS_STATIC:
4338                 sta_flags |= STA_FLG_MIMO_DIS_MSK;
4339                 break;
4340         case WLAN_HT_CAP_MIMO_PS_DYNAMIC:
4341                 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
4342                 break;
4343         case WLAN_HT_CAP_MIMO_PS_DISABLED:
4344                 break;
4345         default:
4346                 IWL_WARNING("Invalid MIMO PS mode %d", mimo_ps_mode);
4347                 break;
4348         }
4349
4350         sta_flags |= cpu_to_le32(
4351               (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
4352
4353         sta_flags |= cpu_to_le32(
4354               (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
4355
4356         if (iwl4965_is_fat_tx_allowed(priv, sta_ht_inf))
4357                 sta_flags |= STA_FLG_FAT_EN_MSK;
4358         else
4359                 sta_flags &= ~STA_FLG_FAT_EN_MSK;
4360
4361         priv->stations[index].sta.station_flags = sta_flags;
4362  done:
4363         return;
4364 }
4365
4366 static void iwl4965_sta_modify_add_ba_tid(struct iwl4965_priv *priv,
4367                                           int sta_id, int tid, u16 ssn)
4368 {
4369         unsigned long flags;
4370
4371         spin_lock_irqsave(&priv->sta_lock, flags);
4372         priv->stations[sta_id].sta.station_flags_msk = 0;
4373         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
4374         priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
4375         priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
4376         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
4377         spin_unlock_irqrestore(&priv->sta_lock, flags);
4378
4379         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
4380 }
4381
4382 static void iwl4965_sta_modify_del_ba_tid(struct iwl4965_priv *priv,
4383                                           int sta_id, int tid)
4384 {
4385         unsigned long flags;
4386
4387         spin_lock_irqsave(&priv->sta_lock, flags);
4388         priv->stations[sta_id].sta.station_flags_msk = 0;
4389         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
4390         priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
4391         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
4392         spin_unlock_irqrestore(&priv->sta_lock, flags);
4393
4394         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
4395 }
4396
4397 /*
4398  * Find first available (lowest unused) Tx Queue, mark it "active".
4399  * Called only when finding queue for aggregation.
4400  * Should never return anything < 7, because they should already
4401  * be in use as EDCA AC (0-3), Command (4), HCCA (5, 6).
4402  */
4403 static int iwl4965_txq_ctx_activate_free(struct iwl4965_priv *priv)
4404 {
4405         int txq_id;
4406
4407         for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++)
4408                 if (!test_and_set_bit(txq_id, &priv->txq_ctx_active_msk))
4409                         return txq_id;
4410         return -1;
4411 }
4412
4413 static int iwl4965_mac_ht_tx_agg_start(struct ieee80211_hw *hw, const u8 *da,
4414                                        u16 tid, u16 *start_seq_num)
4415 {
4416         struct iwl4965_priv *priv = hw->priv;
4417         int sta_id;
4418         int tx_fifo;
4419         int txq_id;
4420         int ssn = -1;
4421         int rc = 0;
4422         unsigned long flags;
4423         struct iwl4965_tid_data *tid_data;
4424         DECLARE_MAC_BUF(mac);
4425
4426         if (likely(tid < ARRAY_SIZE(default_tid_to_tx_fifo)))
4427                 tx_fifo = default_tid_to_tx_fifo[tid];
4428         else
4429                 return -EINVAL;
4430
4431         IWL_WARNING("%s on da = %s tid = %d\n",
4432                         __func__, print_mac(mac, da), tid);
4433
4434         sta_id = iwl4965_hw_find_station(priv, da);
4435         if (sta_id == IWL_INVALID_STATION)
4436                 return -ENXIO;
4437
4438         if (priv->stations[sta_id].tid[tid].agg.state != IWL_AGG_OFF) {
4439                 IWL_ERROR("Start AGG when state is not IWL_AGG_OFF !\n");
4440                 return -ENXIO;
4441         }
4442
4443         txq_id = iwl4965_txq_ctx_activate_free(priv);
4444         if (txq_id == -1)
4445                 return -ENXIO;
4446
4447         spin_lock_irqsave(&priv->sta_lock, flags);
4448         tid_data = &priv->stations[sta_id].tid[tid];
4449         ssn = SEQ_TO_SN(tid_data->seq_number);
4450         tid_data->agg.txq_id = txq_id;
4451         spin_unlock_irqrestore(&priv->sta_lock, flags);
4452
4453         *start_seq_num = ssn;
4454         rc = iwl4965_tx_queue_agg_enable(priv, txq_id, tx_fifo,
4455                                            sta_id, tid, ssn);
4456         if (rc)
4457                 return rc;
4458
4459         rc = 0;
4460         if (tid_data->tfds_in_queue == 0) {
4461                 printk(KERN_ERR "HW queue is empty\n");
4462                 tid_data->agg.state = IWL_AGG_ON;
4463                 ieee80211_start_tx_ba_cb_irqsafe(hw, da, tid);
4464         } else {
4465                 IWL_DEBUG_HT("HW queue is NOT empty: %d packets in HW queue\n",
4466                                 tid_data->tfds_in_queue);
4467                 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA;
4468         }
4469         return rc;
4470 }
4471
4472 static int iwl4965_mac_ht_tx_agg_stop(struct ieee80211_hw *hw, const u8 *da,
4473                                       u16 tid)
4474 {
4475
4476         struct iwl4965_priv *priv = hw->priv;
4477         int tx_fifo_id, txq_id, sta_id, ssn = -1;
4478         struct iwl4965_tid_data *tid_data;
4479         int rc, write_ptr, read_ptr;
4480         unsigned long flags;
4481         DECLARE_MAC_BUF(mac);
4482
4483         if (!da) {
4484                 IWL_ERROR("da = NULL\n");
4485                 return -EINVAL;
4486         }
4487
4488         if (likely(tid < ARRAY_SIZE(default_tid_to_tx_fifo)))
4489                 tx_fifo_id = default_tid_to_tx_fifo[tid];
4490         else
4491                 return -EINVAL;
4492
4493         sta_id = iwl4965_hw_find_station(priv, da);
4494
4495         if (sta_id == IWL_INVALID_STATION)
4496                 return -ENXIO;
4497
4498         if (priv->stations[sta_id].tid[tid].agg.state != IWL_AGG_ON)
4499                 IWL_WARNING("Stopping AGG while state not IWL_AGG_ON\n");
4500
4501         tid_data = &priv->stations[sta_id].tid[tid];
4502         ssn = (tid_data->seq_number & IEEE80211_SCTL_SEQ) >> 4;
4503         txq_id = tid_data->agg.txq_id;
4504         write_ptr = priv->txq[txq_id].q.write_ptr;
4505         read_ptr = priv->txq[txq_id].q.read_ptr;
4506
4507         /* The queue is not empty */
4508         if (write_ptr != read_ptr) {
4509                 IWL_DEBUG_HT("Stopping a non empty AGG HW QUEUE\n");
4510                 priv->stations[sta_id].tid[tid].agg.state =
4511                                 IWL_EMPTYING_HW_QUEUE_DELBA;
4512                 return 0;
4513         }
4514
4515         IWL_DEBUG_HT("HW queue empty\n");;
4516         priv->stations[sta_id].tid[tid].agg.state = IWL_AGG_OFF;
4517
4518         spin_lock_irqsave(&priv->lock, flags);
4519         rc = iwl4965_grab_nic_access(priv);
4520         if (rc) {
4521                 spin_unlock_irqrestore(&priv->lock, flags);
4522                 return rc;
4523         }
4524         rc = iwl4965_tx_queue_agg_disable(priv, txq_id, ssn, tx_fifo_id);
4525         iwl4965_release_nic_access(priv);
4526         spin_unlock_irqrestore(&priv->lock, flags);
4527
4528         if (rc)
4529                 return rc;
4530
4531         ieee80211_stop_tx_ba_cb_irqsafe(priv->hw, da, tid);
4532
4533         IWL_DEBUG_INFO("iwl4965_mac_ht_tx_agg_stop on da=%s tid=%d\n",
4534                         print_mac(mac, da), tid);
4535
4536         return 0;
4537 }
4538
4539 int iwl4965_mac_ampdu_action(struct ieee80211_hw *hw,
4540                              enum ieee80211_ampdu_mlme_action action,
4541                              const u8 *addr, u16 tid, u16 *ssn)
4542 {
4543         struct iwl4965_priv *priv = hw->priv;
4544         int sta_id;
4545         DECLARE_MAC_BUF(mac);
4546
4547         IWL_DEBUG_HT("A-MPDU action on da=%s tid=%d ",
4548                         print_mac(mac, addr), tid);
4549         sta_id = iwl4965_hw_find_station(priv, addr);
4550         switch (action) {
4551         case IEEE80211_AMPDU_RX_START:
4552                 IWL_DEBUG_HT("start Rx\n");
4553                 iwl4965_sta_modify_add_ba_tid(priv, sta_id, tid, *ssn);
4554                 break;
4555         case IEEE80211_AMPDU_RX_STOP:
4556                 IWL_DEBUG_HT("stop Rx\n");
4557                 iwl4965_sta_modify_del_ba_tid(priv, sta_id, tid);
4558                 break;
4559         case IEEE80211_AMPDU_TX_START:
4560                 IWL_DEBUG_HT("start Tx\n");
4561                 return iwl4965_mac_ht_tx_agg_start(hw, addr, tid, ssn);
4562         case IEEE80211_AMPDU_TX_STOP:
4563                 IWL_DEBUG_HT("stop Tx\n");
4564                 return iwl4965_mac_ht_tx_agg_stop(hw, addr, tid);
4565         default:
4566                 IWL_DEBUG_HT("unknown\n");
4567                 return -EINVAL;
4568                 break;
4569         }
4570         return 0;
4571 }
4572
4573 #endif /* CONFIG_IWL4965_HT */
4574
4575 /* Set up 4965-specific Rx frame reply handlers */
4576 void iwl4965_hw_rx_handler_setup(struct iwl4965_priv *priv)
4577 {
4578         /* Legacy Rx frames */
4579         priv->rx_handlers[REPLY_4965_RX] = iwl4965_rx_reply_rx;
4580
4581         /* High-throughput (HT) Rx frames */
4582         priv->rx_handlers[REPLY_RX_PHY_CMD] = iwl4965_rx_reply_rx_phy;
4583         priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwl4965_rx_reply_rx;
4584
4585         priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] =
4586             iwl4965_rx_missed_beacon_notif;
4587
4588 #ifdef CONFIG_IWL4965_HT
4589         priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl4965_rx_reply_compressed_ba;
4590 #endif /* CONFIG_IWL4965_HT */
4591 }
4592
4593 void iwl4965_hw_setup_deferred_work(struct iwl4965_priv *priv)
4594 {
4595         INIT_WORK(&priv->txpower_work, iwl4965_bg_txpower_work);
4596         INIT_WORK(&priv->statistics_work, iwl4965_bg_statistics_work);
4597 #ifdef CONFIG_IWL4965_SENSITIVITY
4598         INIT_WORK(&priv->sensitivity_work, iwl4965_bg_sensitivity_work);
4599 #endif
4600         init_timer(&priv->statistics_periodic);
4601         priv->statistics_periodic.data = (unsigned long)priv;
4602         priv->statistics_periodic.function = iwl4965_bg_statistics_periodic;
4603 }
4604
4605 void iwl4965_hw_cancel_deferred_work(struct iwl4965_priv *priv)
4606 {
4607         del_timer_sync(&priv->statistics_periodic);
4608
4609         cancel_delayed_work(&priv->init_alive_start);
4610 }
4611
4612 struct pci_device_id iwl4965_hw_card_ids[] = {
4613         {PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x4229)},
4614         {PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x4230)},
4615         {0}
4616 };
4617
4618 /*
4619  * The device's EEPROM semaphore prevents conflicts between driver and uCode
4620  * when accessing the EEPROM; each access is a series of pulses to/from the
4621  * EEPROM chip, not a single event, so even reads could conflict if they
4622  * weren't arbitrated by the semaphore.
4623  */
4624 int iwl4965_eeprom_acquire_semaphore(struct iwl4965_priv *priv)
4625 {
4626         u16 count;
4627         int rc;
4628
4629         for (count = 0; count < EEPROM_SEM_RETRY_LIMIT; count++) {
4630                 /* Request semaphore */
4631                 iwl4965_set_bit(priv, CSR_HW_IF_CONFIG_REG,
4632                         CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM);
4633
4634                 /* See if we got it */
4635                 rc = iwl4965_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
4636                                         CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM,
4637                                         CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM,
4638                                         EEPROM_SEM_TIMEOUT);
4639                 if (rc >= 0) {
4640                         IWL_DEBUG_IO("Acquired semaphore after %d tries.\n",
4641                                 count+1);
4642                         return rc;
4643                 }
4644         }
4645
4646         return rc;
4647 }
4648
4649 MODULE_DEVICE_TABLE(pci, iwl4965_hw_card_ids);