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.ac_queue_count = AC_NUM;
1798         priv->hw_setting.tx_cmd_len = sizeof(struct iwl4965_tx_cmd);
1799         priv->hw_setting.max_rxq_size = RX_QUEUE_SIZE;
1800         priv->hw_setting.max_rxq_log = RX_QUEUE_SIZE_LOG;
1801         if (iwl4965_param_amsdu_size_8K)
1802                 priv->hw_setting.rx_buf_size = IWL_RX_BUF_SIZE_8K;
1803         else
1804                 priv->hw_setting.rx_buf_size = IWL_RX_BUF_SIZE_4K;
1805         priv->hw_setting.max_pkt_size = priv->hw_setting.rx_buf_size - 256;
1806         priv->hw_setting.max_stations = IWL4965_STATION_COUNT;
1807         priv->hw_setting.bcast_sta_id = IWL4965_BROADCAST_ID;
1808         return 0;
1809 }
1810
1811 /**
1812  * iwl4965_hw_txq_ctx_free - Free TXQ Context
1813  *
1814  * Destroy all TX DMA queues and structures
1815  */
1816 void iwl4965_hw_txq_ctx_free(struct iwl4965_priv *priv)
1817 {
1818         int txq_id;
1819
1820         /* Tx queues */
1821         for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++)
1822                 iwl4965_tx_queue_free(priv, &priv->txq[txq_id]);
1823
1824         /* Keep-warm buffer */
1825         iwl4965_kw_free(priv);
1826 }
1827
1828 /**
1829  * iwl4965_hw_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr]
1830  *
1831  * Does NOT advance any TFD circular buffer read/write indexes
1832  * Does NOT free the TFD itself (which is within circular buffer)
1833  */
1834 int iwl4965_hw_txq_free_tfd(struct iwl4965_priv *priv, struct iwl4965_tx_queue *txq)
1835 {
1836         struct iwl4965_tfd_frame *bd_tmp = (struct iwl4965_tfd_frame *)&txq->bd[0];
1837         struct iwl4965_tfd_frame *bd = &bd_tmp[txq->q.read_ptr];
1838         struct pci_dev *dev = priv->pci_dev;
1839         int i;
1840         int counter = 0;
1841         int index, is_odd;
1842
1843         /* Host command buffers stay mapped in memory, nothing to clean */
1844         if (txq->q.id == IWL_CMD_QUEUE_NUM)
1845                 return 0;
1846
1847         /* Sanity check on number of chunks */
1848         counter = IWL_GET_BITS(*bd, num_tbs);
1849         if (counter > MAX_NUM_OF_TBS) {
1850                 IWL_ERROR("Too many chunks: %i\n", counter);
1851                 /* @todo issue fatal error, it is quite serious situation */
1852                 return 0;
1853         }
1854
1855         /* Unmap chunks, if any.
1856          * TFD info for odd chunks is different format than for even chunks. */
1857         for (i = 0; i < counter; i++) {
1858                 index = i / 2;
1859                 is_odd = i & 0x1;
1860
1861                 if (is_odd)
1862                         pci_unmap_single(
1863                                 dev,
1864                                 IWL_GET_BITS(bd->pa[index], tb2_addr_lo16) |
1865                                 (IWL_GET_BITS(bd->pa[index],
1866                                               tb2_addr_hi20) << 16),
1867                                 IWL_GET_BITS(bd->pa[index], tb2_len),
1868                                 PCI_DMA_TODEVICE);
1869
1870                 else if (i > 0)
1871                         pci_unmap_single(dev,
1872                                          le32_to_cpu(bd->pa[index].tb1_addr),
1873                                          IWL_GET_BITS(bd->pa[index], tb1_len),
1874                                          PCI_DMA_TODEVICE);
1875
1876                 /* Free SKB, if any, for this chunk */
1877                 if (txq->txb[txq->q.read_ptr].skb[i]) {
1878                         struct sk_buff *skb = txq->txb[txq->q.read_ptr].skb[i];
1879
1880                         dev_kfree_skb(skb);
1881                         txq->txb[txq->q.read_ptr].skb[i] = NULL;
1882                 }
1883         }
1884         return 0;
1885 }
1886
1887 int iwl4965_hw_reg_set_txpower(struct iwl4965_priv *priv, s8 power)
1888 {
1889         IWL_ERROR("TODO: Implement iwl4965_hw_reg_set_txpower!\n");
1890         return -EINVAL;
1891 }
1892
1893 static s32 iwl4965_math_div_round(s32 num, s32 denom, s32 *res)
1894 {
1895         s32 sign = 1;
1896
1897         if (num < 0) {
1898                 sign = -sign;
1899                 num = -num;
1900         }
1901         if (denom < 0) {
1902                 sign = -sign;
1903                 denom = -denom;
1904         }
1905         *res = 1;
1906         *res = ((num * 2 + denom) / (denom * 2)) * sign;
1907
1908         return 1;
1909 }
1910
1911 /**
1912  * iwl4965_get_voltage_compensation - Power supply voltage comp for txpower
1913  *
1914  * Determines power supply voltage compensation for txpower calculations.
1915  * Returns number of 1/2-dB steps to subtract from gain table index,
1916  * to compensate for difference between power supply voltage during
1917  * factory measurements, vs. current power supply voltage.
1918  *
1919  * Voltage indication is higher for lower voltage.
1920  * Lower voltage requires more gain (lower gain table index).
1921  */
1922 static s32 iwl4965_get_voltage_compensation(s32 eeprom_voltage,
1923                                             s32 current_voltage)
1924 {
1925         s32 comp = 0;
1926
1927         if ((TX_POWER_IWL_ILLEGAL_VOLTAGE == eeprom_voltage) ||
1928             (TX_POWER_IWL_ILLEGAL_VOLTAGE == current_voltage))
1929                 return 0;
1930
1931         iwl4965_math_div_round(current_voltage - eeprom_voltage,
1932                                TX_POWER_IWL_VOLTAGE_CODES_PER_03V, &comp);
1933
1934         if (current_voltage > eeprom_voltage)
1935                 comp *= 2;
1936         if ((comp < -2) || (comp > 2))
1937                 comp = 0;
1938
1939         return comp;
1940 }
1941
1942 static const struct iwl4965_channel_info *
1943 iwl4965_get_channel_txpower_info(struct iwl4965_priv *priv,
1944                                  enum ieee80211_band band, u16 channel)
1945 {
1946         const struct iwl4965_channel_info *ch_info;
1947
1948         ch_info = iwl4965_get_channel_info(priv, band, channel);
1949
1950         if (!is_channel_valid(ch_info))
1951                 return NULL;
1952
1953         return ch_info;
1954 }
1955
1956 static s32 iwl4965_get_tx_atten_grp(u16 channel)
1957 {
1958         if (channel >= CALIB_IWL_TX_ATTEN_GR5_FCH &&
1959             channel <= CALIB_IWL_TX_ATTEN_GR5_LCH)
1960                 return CALIB_CH_GROUP_5;
1961
1962         if (channel >= CALIB_IWL_TX_ATTEN_GR1_FCH &&
1963             channel <= CALIB_IWL_TX_ATTEN_GR1_LCH)
1964                 return CALIB_CH_GROUP_1;
1965
1966         if (channel >= CALIB_IWL_TX_ATTEN_GR2_FCH &&
1967             channel <= CALIB_IWL_TX_ATTEN_GR2_LCH)
1968                 return CALIB_CH_GROUP_2;
1969
1970         if (channel >= CALIB_IWL_TX_ATTEN_GR3_FCH &&
1971             channel <= CALIB_IWL_TX_ATTEN_GR3_LCH)
1972                 return CALIB_CH_GROUP_3;
1973
1974         if (channel >= CALIB_IWL_TX_ATTEN_GR4_FCH &&
1975             channel <= CALIB_IWL_TX_ATTEN_GR4_LCH)
1976                 return CALIB_CH_GROUP_4;
1977
1978         IWL_ERROR("Can't find txatten group for channel %d.\n", channel);
1979         return -1;
1980 }
1981
1982 static u32 iwl4965_get_sub_band(const struct iwl4965_priv *priv, u32 channel)
1983 {
1984         s32 b = -1;
1985
1986         for (b = 0; b < EEPROM_TX_POWER_BANDS; b++) {
1987                 if (priv->eeprom.calib_info.band_info[b].ch_from == 0)
1988                         continue;
1989
1990                 if ((channel >= priv->eeprom.calib_info.band_info[b].ch_from)
1991                     && (channel <= priv->eeprom.calib_info.band_info[b].ch_to))
1992                         break;
1993         }
1994
1995         return b;
1996 }
1997
1998 static s32 iwl4965_interpolate_value(s32 x, s32 x1, s32 y1, s32 x2, s32 y2)
1999 {
2000         s32 val;
2001
2002         if (x2 == x1)
2003                 return y1;
2004         else {
2005                 iwl4965_math_div_round((x2 - x) * (y1 - y2), (x2 - x1), &val);
2006                 return val + y2;
2007         }
2008 }
2009
2010 /**
2011  * iwl4965_interpolate_chan - Interpolate factory measurements for one channel
2012  *
2013  * Interpolates factory measurements from the two sample channels within a
2014  * sub-band, to apply to channel of interest.  Interpolation is proportional to
2015  * differences in channel frequencies, which is proportional to differences
2016  * in channel number.
2017  */
2018 static int iwl4965_interpolate_chan(struct iwl4965_priv *priv, u32 channel,
2019                                     struct iwl4965_eeprom_calib_ch_info *chan_info)
2020 {
2021         s32 s = -1;
2022         u32 c;
2023         u32 m;
2024         const struct iwl4965_eeprom_calib_measure *m1;
2025         const struct iwl4965_eeprom_calib_measure *m2;
2026         struct iwl4965_eeprom_calib_measure *omeas;
2027         u32 ch_i1;
2028         u32 ch_i2;
2029
2030         s = iwl4965_get_sub_band(priv, channel);
2031         if (s >= EEPROM_TX_POWER_BANDS) {
2032                 IWL_ERROR("Tx Power can not find channel %d ", channel);
2033                 return -1;
2034         }
2035
2036         ch_i1 = priv->eeprom.calib_info.band_info[s].ch1.ch_num;
2037         ch_i2 = priv->eeprom.calib_info.band_info[s].ch2.ch_num;
2038         chan_info->ch_num = (u8) channel;
2039
2040         IWL_DEBUG_TXPOWER("channel %d subband %d factory cal ch %d & %d\n",
2041                           channel, s, ch_i1, ch_i2);
2042
2043         for (c = 0; c < EEPROM_TX_POWER_TX_CHAINS; c++) {
2044                 for (m = 0; m < EEPROM_TX_POWER_MEASUREMENTS; m++) {
2045                         m1 = &(priv->eeprom.calib_info.band_info[s].ch1.
2046                                measurements[c][m]);
2047                         m2 = &(priv->eeprom.calib_info.band_info[s].ch2.
2048                                measurements[c][m]);
2049                         omeas = &(chan_info->measurements[c][m]);
2050
2051                         omeas->actual_pow =
2052                             (u8) iwl4965_interpolate_value(channel, ch_i1,
2053                                                            m1->actual_pow,
2054                                                            ch_i2,
2055                                                            m2->actual_pow);
2056                         omeas->gain_idx =
2057                             (u8) iwl4965_interpolate_value(channel, ch_i1,
2058                                                            m1->gain_idx, ch_i2,
2059                                                            m2->gain_idx);
2060                         omeas->temperature =
2061                             (u8) iwl4965_interpolate_value(channel, ch_i1,
2062                                                            m1->temperature,
2063                                                            ch_i2,
2064                                                            m2->temperature);
2065                         omeas->pa_det =
2066                             (s8) iwl4965_interpolate_value(channel, ch_i1,
2067                                                            m1->pa_det, ch_i2,
2068                                                            m2->pa_det);
2069
2070                         IWL_DEBUG_TXPOWER
2071                             ("chain %d meas %d AP1=%d AP2=%d AP=%d\n", c, m,
2072                              m1->actual_pow, m2->actual_pow, omeas->actual_pow);
2073                         IWL_DEBUG_TXPOWER
2074                             ("chain %d meas %d NI1=%d NI2=%d NI=%d\n", c, m,
2075                              m1->gain_idx, m2->gain_idx, omeas->gain_idx);
2076                         IWL_DEBUG_TXPOWER
2077                             ("chain %d meas %d PA1=%d PA2=%d PA=%d\n", c, m,
2078                              m1->pa_det, m2->pa_det, omeas->pa_det);
2079                         IWL_DEBUG_TXPOWER
2080                             ("chain %d meas %d  T1=%d  T2=%d  T=%d\n", c, m,
2081                              m1->temperature, m2->temperature,
2082                              omeas->temperature);
2083                 }
2084         }
2085
2086         return 0;
2087 }
2088
2089 /* bit-rate-dependent table to prevent Tx distortion, in half-dB units,
2090  * for OFDM 6, 12, 18, 24, 36, 48, 54, 60 MBit, and CCK all rates. */
2091 static s32 back_off_table[] = {
2092         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 20 MHz */
2093         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 20 MHz */
2094         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 40 MHz */
2095         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 40 MHz */
2096         10                      /* CCK */
2097 };
2098
2099 /* Thermal compensation values for txpower for various frequency ranges ...
2100  *   ratios from 3:1 to 4.5:1 of degrees (Celsius) per half-dB gain adjust */
2101 static struct iwl4965_txpower_comp_entry {
2102         s32 degrees_per_05db_a;
2103         s32 degrees_per_05db_a_denom;
2104 } tx_power_cmp_tble[CALIB_CH_GROUP_MAX] = {
2105         {9, 2},                 /* group 0 5.2, ch  34-43 */
2106         {4, 1},                 /* group 1 5.2, ch  44-70 */
2107         {4, 1},                 /* group 2 5.2, ch  71-124 */
2108         {4, 1},                 /* group 3 5.2, ch 125-200 */
2109         {3, 1}                  /* group 4 2.4, ch   all */
2110 };
2111
2112 static s32 get_min_power_index(s32 rate_power_index, u32 band)
2113 {
2114         if (!band) {
2115                 if ((rate_power_index & 7) <= 4)
2116                         return MIN_TX_GAIN_INDEX_52GHZ_EXT;
2117         }
2118         return MIN_TX_GAIN_INDEX;
2119 }
2120
2121 struct gain_entry {
2122         u8 dsp;
2123         u8 radio;
2124 };
2125
2126 static const struct gain_entry gain_table[2][108] = {
2127         /* 5.2GHz power gain index table */
2128         {
2129          {123, 0x3F},           /* highest txpower */
2130          {117, 0x3F},
2131          {110, 0x3F},
2132          {104, 0x3F},
2133          {98, 0x3F},
2134          {110, 0x3E},
2135          {104, 0x3E},
2136          {98, 0x3E},
2137          {110, 0x3D},
2138          {104, 0x3D},
2139          {98, 0x3D},
2140          {110, 0x3C},
2141          {104, 0x3C},
2142          {98, 0x3C},
2143          {110, 0x3B},
2144          {104, 0x3B},
2145          {98, 0x3B},
2146          {110, 0x3A},
2147          {104, 0x3A},
2148          {98, 0x3A},
2149          {110, 0x39},
2150          {104, 0x39},
2151          {98, 0x39},
2152          {110, 0x38},
2153          {104, 0x38},
2154          {98, 0x38},
2155          {110, 0x37},
2156          {104, 0x37},
2157          {98, 0x37},
2158          {110, 0x36},
2159          {104, 0x36},
2160          {98, 0x36},
2161          {110, 0x35},
2162          {104, 0x35},
2163          {98, 0x35},
2164          {110, 0x34},
2165          {104, 0x34},
2166          {98, 0x34},
2167          {110, 0x33},
2168          {104, 0x33},
2169          {98, 0x33},
2170          {110, 0x32},
2171          {104, 0x32},
2172          {98, 0x32},
2173          {110, 0x31},
2174          {104, 0x31},
2175          {98, 0x31},
2176          {110, 0x30},
2177          {104, 0x30},
2178          {98, 0x30},
2179          {110, 0x25},
2180          {104, 0x25},
2181          {98, 0x25},
2182          {110, 0x24},
2183          {104, 0x24},
2184          {98, 0x24},
2185          {110, 0x23},
2186          {104, 0x23},
2187          {98, 0x23},
2188          {110, 0x22},
2189          {104, 0x18},
2190          {98, 0x18},
2191          {110, 0x17},
2192          {104, 0x17},
2193          {98, 0x17},
2194          {110, 0x16},
2195          {104, 0x16},
2196          {98, 0x16},
2197          {110, 0x15},
2198          {104, 0x15},
2199          {98, 0x15},
2200          {110, 0x14},
2201          {104, 0x14},
2202          {98, 0x14},
2203          {110, 0x13},
2204          {104, 0x13},
2205          {98, 0x13},
2206          {110, 0x12},
2207          {104, 0x08},
2208          {98, 0x08},
2209          {110, 0x07},
2210          {104, 0x07},
2211          {98, 0x07},
2212          {110, 0x06},
2213          {104, 0x06},
2214          {98, 0x06},
2215          {110, 0x05},
2216          {104, 0x05},
2217          {98, 0x05},
2218          {110, 0x04},
2219          {104, 0x04},
2220          {98, 0x04},
2221          {110, 0x03},
2222          {104, 0x03},
2223          {98, 0x03},
2224          {110, 0x02},
2225          {104, 0x02},
2226          {98, 0x02},
2227          {110, 0x01},
2228          {104, 0x01},
2229          {98, 0x01},
2230          {110, 0x00},
2231          {104, 0x00},
2232          {98, 0x00},
2233          {93, 0x00},
2234          {88, 0x00},
2235          {83, 0x00},
2236          {78, 0x00},
2237          },
2238         /* 2.4GHz power gain index table */
2239         {
2240          {110, 0x3f},           /* highest txpower */
2241          {104, 0x3f},
2242          {98, 0x3f},
2243          {110, 0x3e},
2244          {104, 0x3e},
2245          {98, 0x3e},
2246          {110, 0x3d},
2247          {104, 0x3d},
2248          {98, 0x3d},
2249          {110, 0x3c},
2250          {104, 0x3c},
2251          {98, 0x3c},
2252          {110, 0x3b},
2253          {104, 0x3b},
2254          {98, 0x3b},
2255          {110, 0x3a},
2256          {104, 0x3a},
2257          {98, 0x3a},
2258          {110, 0x39},
2259          {104, 0x39},
2260          {98, 0x39},
2261          {110, 0x38},
2262          {104, 0x38},
2263          {98, 0x38},
2264          {110, 0x37},
2265          {104, 0x37},
2266          {98, 0x37},
2267          {110, 0x36},
2268          {104, 0x36},
2269          {98, 0x36},
2270          {110, 0x35},
2271          {104, 0x35},
2272          {98, 0x35},
2273          {110, 0x34},
2274          {104, 0x34},
2275          {98, 0x34},
2276          {110, 0x33},
2277          {104, 0x33},
2278          {98, 0x33},
2279          {110, 0x32},
2280          {104, 0x32},
2281          {98, 0x32},
2282          {110, 0x31},
2283          {104, 0x31},
2284          {98, 0x31},
2285          {110, 0x30},
2286          {104, 0x30},
2287          {98, 0x30},
2288          {110, 0x6},
2289          {104, 0x6},
2290          {98, 0x6},
2291          {110, 0x5},
2292          {104, 0x5},
2293          {98, 0x5},
2294          {110, 0x4},
2295          {104, 0x4},
2296          {98, 0x4},
2297          {110, 0x3},
2298          {104, 0x3},
2299          {98, 0x3},
2300          {110, 0x2},
2301          {104, 0x2},
2302          {98, 0x2},
2303          {110, 0x1},
2304          {104, 0x1},
2305          {98, 0x1},
2306          {110, 0x0},
2307          {104, 0x0},
2308          {98, 0x0},
2309          {97, 0},
2310          {96, 0},
2311          {95, 0},
2312          {94, 0},
2313          {93, 0},
2314          {92, 0},
2315          {91, 0},
2316          {90, 0},
2317          {89, 0},
2318          {88, 0},
2319          {87, 0},
2320          {86, 0},
2321          {85, 0},
2322          {84, 0},
2323          {83, 0},
2324          {82, 0},
2325          {81, 0},
2326          {80, 0},
2327          {79, 0},
2328          {78, 0},
2329          {77, 0},
2330          {76, 0},
2331          {75, 0},
2332          {74, 0},
2333          {73, 0},
2334          {72, 0},
2335          {71, 0},
2336          {70, 0},
2337          {69, 0},
2338          {68, 0},
2339          {67, 0},
2340          {66, 0},
2341          {65, 0},
2342          {64, 0},
2343          {63, 0},
2344          {62, 0},
2345          {61, 0},
2346          {60, 0},
2347          {59, 0},
2348          }
2349 };
2350
2351 static int iwl4965_fill_txpower_tbl(struct iwl4965_priv *priv, u8 band, u16 channel,
2352                                     u8 is_fat, u8 ctrl_chan_high,
2353                                     struct iwl4965_tx_power_db *tx_power_tbl)
2354 {
2355         u8 saturation_power;
2356         s32 target_power;
2357         s32 user_target_power;
2358         s32 power_limit;
2359         s32 current_temp;
2360         s32 reg_limit;
2361         s32 current_regulatory;
2362         s32 txatten_grp = CALIB_CH_GROUP_MAX;
2363         int i;
2364         int c;
2365         const struct iwl4965_channel_info *ch_info = NULL;
2366         struct iwl4965_eeprom_calib_ch_info ch_eeprom_info;
2367         const struct iwl4965_eeprom_calib_measure *measurement;
2368         s16 voltage;
2369         s32 init_voltage;
2370         s32 voltage_compensation;
2371         s32 degrees_per_05db_num;
2372         s32 degrees_per_05db_denom;
2373         s32 factory_temp;
2374         s32 temperature_comp[2];
2375         s32 factory_gain_index[2];
2376         s32 factory_actual_pwr[2];
2377         s32 power_index;
2378
2379         /* Sanity check requested level (dBm) */
2380         if (priv->user_txpower_limit < IWL_TX_POWER_TARGET_POWER_MIN) {
2381                 IWL_WARNING("Requested user TXPOWER %d below limit.\n",
2382                             priv->user_txpower_limit);
2383                 return -EINVAL;
2384         }
2385         if (priv->user_txpower_limit > IWL_TX_POWER_TARGET_POWER_MAX) {
2386                 IWL_WARNING("Requested user TXPOWER %d above limit.\n",
2387                             priv->user_txpower_limit);
2388                 return -EINVAL;
2389         }
2390
2391         /* user_txpower_limit is in dBm, convert to half-dBm (half-dB units
2392          *   are used for indexing into txpower table) */
2393         user_target_power = 2 * priv->user_txpower_limit;
2394
2395         /* Get current (RXON) channel, band, width */
2396         ch_info =
2397                 iwl4965_get_channel_txpower_info(priv, priv->band, channel);
2398
2399         IWL_DEBUG_TXPOWER("chan %d band %d is_fat %d\n", channel, band,
2400                           is_fat);
2401
2402         if (!ch_info)
2403                 return -EINVAL;
2404
2405         /* get txatten group, used to select 1) thermal txpower adjustment
2406          *   and 2) mimo txpower balance between Tx chains. */
2407         txatten_grp = iwl4965_get_tx_atten_grp(channel);
2408         if (txatten_grp < 0)
2409                 return -EINVAL;
2410
2411         IWL_DEBUG_TXPOWER("channel %d belongs to txatten group %d\n",
2412                           channel, txatten_grp);
2413
2414         if (is_fat) {
2415                 if (ctrl_chan_high)
2416                         channel -= 2;
2417                 else
2418                         channel += 2;
2419         }
2420
2421         /* hardware txpower limits ...
2422          * saturation (clipping distortion) txpowers are in half-dBm */
2423         if (band)
2424                 saturation_power = priv->eeprom.calib_info.saturation_power24;
2425         else
2426                 saturation_power = priv->eeprom.calib_info.saturation_power52;
2427
2428         if (saturation_power < IWL_TX_POWER_SATURATION_MIN ||
2429             saturation_power > IWL_TX_POWER_SATURATION_MAX) {
2430                 if (band)
2431                         saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_24;
2432                 else
2433                         saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_52;
2434         }
2435
2436         /* regulatory txpower limits ... reg_limit values are in half-dBm,
2437          *   max_power_avg values are in dBm, convert * 2 */
2438         if (is_fat)
2439                 reg_limit = ch_info->fat_max_power_avg * 2;
2440         else
2441                 reg_limit = ch_info->max_power_avg * 2;
2442
2443         if ((reg_limit < IWL_TX_POWER_REGULATORY_MIN) ||
2444             (reg_limit > IWL_TX_POWER_REGULATORY_MAX)) {
2445                 if (band)
2446                         reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_24;
2447                 else
2448                         reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_52;
2449         }
2450
2451         /* Interpolate txpower calibration values for this channel,
2452          *   based on factory calibration tests on spaced channels. */
2453         iwl4965_interpolate_chan(priv, channel, &ch_eeprom_info);
2454
2455         /* calculate tx gain adjustment based on power supply voltage */
2456         voltage = priv->eeprom.calib_info.voltage;
2457         init_voltage = (s32)le32_to_cpu(priv->card_alive_init.voltage);
2458         voltage_compensation =
2459             iwl4965_get_voltage_compensation(voltage, init_voltage);
2460
2461         IWL_DEBUG_TXPOWER("curr volt %d eeprom volt %d volt comp %d\n",
2462                           init_voltage,
2463                           voltage, voltage_compensation);
2464
2465         /* get current temperature (Celsius) */
2466         current_temp = max(priv->temperature, IWL_TX_POWER_TEMPERATURE_MIN);
2467         current_temp = min(priv->temperature, IWL_TX_POWER_TEMPERATURE_MAX);
2468         current_temp = KELVIN_TO_CELSIUS(current_temp);
2469
2470         /* select thermal txpower adjustment params, based on channel group
2471          *   (same frequency group used for mimo txatten adjustment) */
2472         degrees_per_05db_num =
2473             tx_power_cmp_tble[txatten_grp].degrees_per_05db_a;
2474         degrees_per_05db_denom =
2475             tx_power_cmp_tble[txatten_grp].degrees_per_05db_a_denom;
2476
2477         /* get per-chain txpower values from factory measurements */
2478         for (c = 0; c < 2; c++) {
2479                 measurement = &ch_eeprom_info.measurements[c][1];
2480
2481                 /* txgain adjustment (in half-dB steps) based on difference
2482                  *   between factory and current temperature */
2483                 factory_temp = measurement->temperature;
2484                 iwl4965_math_div_round((current_temp - factory_temp) *
2485                                        degrees_per_05db_denom,
2486                                        degrees_per_05db_num,
2487                                        &temperature_comp[c]);
2488
2489                 factory_gain_index[c] = measurement->gain_idx;
2490                 factory_actual_pwr[c] = measurement->actual_pow;
2491
2492                 IWL_DEBUG_TXPOWER("chain = %d\n", c);
2493                 IWL_DEBUG_TXPOWER("fctry tmp %d, "
2494                                   "curr tmp %d, comp %d steps\n",
2495                                   factory_temp, current_temp,
2496                                   temperature_comp[c]);
2497
2498                 IWL_DEBUG_TXPOWER("fctry idx %d, fctry pwr %d\n",
2499                                   factory_gain_index[c],
2500                                   factory_actual_pwr[c]);
2501         }
2502
2503         /* for each of 33 bit-rates (including 1 for CCK) */
2504         for (i = 0; i < POWER_TABLE_NUM_ENTRIES; i++) {
2505                 u8 is_mimo_rate;
2506                 union iwl4965_tx_power_dual_stream tx_power;
2507
2508                 /* for mimo, reduce each chain's txpower by half
2509                  * (3dB, 6 steps), so total output power is regulatory
2510                  * compliant. */
2511                 if (i & 0x8) {
2512                         current_regulatory = reg_limit -
2513                             IWL_TX_POWER_MIMO_REGULATORY_COMPENSATION;
2514                         is_mimo_rate = 1;
2515                 } else {
2516                         current_regulatory = reg_limit;
2517                         is_mimo_rate = 0;
2518                 }
2519
2520                 /* find txpower limit, either hardware or regulatory */
2521                 power_limit = saturation_power - back_off_table[i];
2522                 if (power_limit > current_regulatory)
2523                         power_limit = current_regulatory;
2524
2525                 /* reduce user's txpower request if necessary
2526                  * for this rate on this channel */
2527                 target_power = user_target_power;
2528                 if (target_power > power_limit)
2529                         target_power = power_limit;
2530
2531                 IWL_DEBUG_TXPOWER("rate %d sat %d reg %d usr %d tgt %d\n",
2532                                   i, saturation_power - back_off_table[i],
2533                                   current_regulatory, user_target_power,
2534                                   target_power);
2535
2536                 /* for each of 2 Tx chains (radio transmitters) */
2537                 for (c = 0; c < 2; c++) {
2538                         s32 atten_value;
2539
2540                         if (is_mimo_rate)
2541                                 atten_value =
2542                                     (s32)le32_to_cpu(priv->card_alive_init.
2543                                     tx_atten[txatten_grp][c]);
2544                         else
2545                                 atten_value = 0;
2546
2547                         /* calculate index; higher index means lower txpower */
2548                         power_index = (u8) (factory_gain_index[c] -
2549                                             (target_power -
2550                                              factory_actual_pwr[c]) -
2551                                             temperature_comp[c] -
2552                                             voltage_compensation +
2553                                             atten_value);
2554
2555 /*                      IWL_DEBUG_TXPOWER("calculated txpower index %d\n",
2556                                                 power_index); */
2557
2558                         if (power_index < get_min_power_index(i, band))
2559                                 power_index = get_min_power_index(i, band);
2560
2561                         /* adjust 5 GHz index to support negative indexes */
2562                         if (!band)
2563                                 power_index += 9;
2564
2565                         /* CCK, rate 32, reduce txpower for CCK */
2566                         if (i == POWER_TABLE_CCK_ENTRY)
2567                                 power_index +=
2568                                     IWL_TX_POWER_CCK_COMPENSATION_C_STEP;
2569
2570                         /* stay within the table! */
2571                         if (power_index > 107) {
2572                                 IWL_WARNING("txpower index %d > 107\n",
2573                                             power_index);
2574                                 power_index = 107;
2575                         }
2576                         if (power_index < 0) {
2577                                 IWL_WARNING("txpower index %d < 0\n",
2578                                             power_index);
2579                                 power_index = 0;
2580                         }
2581
2582                         /* fill txpower command for this rate/chain */
2583                         tx_power.s.radio_tx_gain[c] =
2584                                 gain_table[band][power_index].radio;
2585                         tx_power.s.dsp_predis_atten[c] =
2586                                 gain_table[band][power_index].dsp;
2587
2588                         IWL_DEBUG_TXPOWER("chain %d mimo %d index %d "
2589                                           "gain 0x%02x dsp %d\n",
2590                                           c, atten_value, power_index,
2591                                         tx_power.s.radio_tx_gain[c],
2592                                         tx_power.s.dsp_predis_atten[c]);
2593                 }/* for each chain */
2594
2595                 tx_power_tbl->power_tbl[i].dw = cpu_to_le32(tx_power.dw);
2596
2597         }/* for each rate */
2598
2599         return 0;
2600 }
2601
2602 /**
2603  * iwl4965_hw_reg_send_txpower - Configure the TXPOWER level user limit
2604  *
2605  * Uses the active RXON for channel, band, and characteristics (fat, high)
2606  * The power limit is taken from priv->user_txpower_limit.
2607  */
2608 int iwl4965_hw_reg_send_txpower(struct iwl4965_priv *priv)
2609 {
2610         struct iwl4965_txpowertable_cmd cmd = { 0 };
2611         int rc = 0;
2612         u8 band = 0;
2613         u8 is_fat = 0;
2614         u8 ctrl_chan_high = 0;
2615
2616         if (test_bit(STATUS_SCANNING, &priv->status)) {
2617                 /* If this gets hit a lot, switch it to a BUG() and catch
2618                  * the stack trace to find out who is calling this during
2619                  * a scan. */
2620                 IWL_WARNING("TX Power requested while scanning!\n");
2621                 return -EAGAIN;
2622         }
2623
2624         band = priv->band == IEEE80211_BAND_2GHZ;
2625
2626         is_fat =  is_fat_channel(priv->active_rxon.flags);
2627
2628         if (is_fat &&
2629             (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
2630                 ctrl_chan_high = 1;
2631
2632         cmd.band = band;
2633         cmd.channel = priv->active_rxon.channel;
2634
2635         rc = iwl4965_fill_txpower_tbl(priv, band,
2636                                 le16_to_cpu(priv->active_rxon.channel),
2637                                 is_fat, ctrl_chan_high, &cmd.tx_power);
2638         if (rc)
2639                 return rc;
2640
2641         rc = iwl4965_send_cmd_pdu(priv, REPLY_TX_PWR_TABLE_CMD, sizeof(cmd), &cmd);
2642         return rc;
2643 }
2644
2645 int iwl4965_hw_channel_switch(struct iwl4965_priv *priv, u16 channel)
2646 {
2647         int rc;
2648         u8 band = 0;
2649         u8 is_fat = 0;
2650         u8 ctrl_chan_high = 0;
2651         struct iwl4965_channel_switch_cmd cmd = { 0 };
2652         const struct iwl4965_channel_info *ch_info;
2653
2654         band = priv->band == IEEE80211_BAND_2GHZ;
2655
2656         ch_info = iwl4965_get_channel_info(priv, priv->band, channel);
2657
2658         is_fat = is_fat_channel(priv->staging_rxon.flags);
2659
2660         if (is_fat &&
2661             (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
2662                 ctrl_chan_high = 1;
2663
2664         cmd.band = band;
2665         cmd.expect_beacon = 0;
2666         cmd.channel = cpu_to_le16(channel);
2667         cmd.rxon_flags = priv->active_rxon.flags;
2668         cmd.rxon_filter_flags = priv->active_rxon.filter_flags;
2669         cmd.switch_time = cpu_to_le32(priv->ucode_beacon_time);
2670         if (ch_info)
2671                 cmd.expect_beacon = is_channel_radar(ch_info);
2672         else
2673                 cmd.expect_beacon = 1;
2674
2675         rc = iwl4965_fill_txpower_tbl(priv, band, channel, is_fat,
2676                                       ctrl_chan_high, &cmd.tx_power);
2677         if (rc) {
2678                 IWL_DEBUG_11H("error:%d  fill txpower_tbl\n", rc);
2679                 return rc;
2680         }
2681
2682         rc = iwl4965_send_cmd_pdu(priv, REPLY_CHANNEL_SWITCH, sizeof(cmd), &cmd);
2683         return rc;
2684 }
2685
2686 #define RTS_HCCA_RETRY_LIMIT            3
2687 #define RTS_DFAULT_RETRY_LIMIT          60
2688
2689 void iwl4965_hw_build_tx_cmd_rate(struct iwl4965_priv *priv,
2690                               struct iwl4965_cmd *cmd,
2691                               struct ieee80211_tx_control *ctrl,
2692                               struct ieee80211_hdr *hdr, int sta_id,
2693                               int is_hcca)
2694 {
2695         struct iwl4965_tx_cmd *tx = &cmd->cmd.tx;
2696         u8 rts_retry_limit = 0;
2697         u8 data_retry_limit = 0;
2698         u16 fc = le16_to_cpu(hdr->frame_control);
2699         u8 rate_plcp;
2700         u16 rate_flags = 0;
2701         int rate_idx = min(ctrl->tx_rate->hw_value & 0xffff, IWL_RATE_COUNT - 1);
2702
2703         rate_plcp = iwl4965_rates[rate_idx].plcp;
2704
2705         rts_retry_limit = (is_hcca) ?
2706             RTS_HCCA_RETRY_LIMIT : RTS_DFAULT_RETRY_LIMIT;
2707
2708         if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
2709                 rate_flags |= RATE_MCS_CCK_MSK;
2710
2711
2712         if (ieee80211_is_probe_response(fc)) {
2713                 data_retry_limit = 3;
2714                 if (data_retry_limit < rts_retry_limit)
2715                         rts_retry_limit = data_retry_limit;
2716         } else
2717                 data_retry_limit = IWL_DEFAULT_TX_RETRY;
2718
2719         if (priv->data_retry_limit != -1)
2720                 data_retry_limit = priv->data_retry_limit;
2721
2722
2723         if (ieee80211_is_data(fc)) {
2724                 tx->initial_rate_index = 0;
2725                 tx->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
2726         } else {
2727                 switch (fc & IEEE80211_FCTL_STYPE) {
2728                 case IEEE80211_STYPE_AUTH:
2729                 case IEEE80211_STYPE_DEAUTH:
2730                 case IEEE80211_STYPE_ASSOC_REQ:
2731                 case IEEE80211_STYPE_REASSOC_REQ:
2732                         if (tx->tx_flags & TX_CMD_FLG_RTS_MSK) {
2733                                 tx->tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2734                                 tx->tx_flags |= TX_CMD_FLG_CTS_MSK;
2735                         }
2736                         break;
2737                 default:
2738                         break;
2739                 }
2740
2741                 /* Alternate between antenna A and B for successive frames */
2742                 if (priv->use_ant_b_for_management_frame) {
2743                         priv->use_ant_b_for_management_frame = 0;
2744                         rate_flags |= RATE_MCS_ANT_B_MSK;
2745                 } else {
2746                         priv->use_ant_b_for_management_frame = 1;
2747                         rate_flags |= RATE_MCS_ANT_A_MSK;
2748                 }
2749         }
2750
2751         tx->rts_retry_limit = rts_retry_limit;
2752         tx->data_retry_limit = data_retry_limit;
2753         tx->rate_n_flags = iwl4965_hw_set_rate_n_flags(rate_plcp, rate_flags);
2754 }
2755
2756 int iwl4965_hw_get_rx_read(struct iwl4965_priv *priv)
2757 {
2758         struct iwl4965_shared *shared_data = priv->hw_setting.shared_virt;
2759
2760         return IWL_GET_BITS(*shared_data, rb_closed_stts_rb_num);
2761 }
2762
2763 int iwl4965_hw_get_temperature(struct iwl4965_priv *priv)
2764 {
2765         return priv->temperature;
2766 }
2767
2768 unsigned int iwl4965_hw_get_beacon_cmd(struct iwl4965_priv *priv,
2769                           struct iwl4965_frame *frame, u8 rate)
2770 {
2771         struct iwl4965_tx_beacon_cmd *tx_beacon_cmd;
2772         unsigned int frame_size;
2773
2774         tx_beacon_cmd = &frame->u.beacon;
2775         memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
2776
2777         tx_beacon_cmd->tx.sta_id = IWL4965_BROADCAST_ID;
2778         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2779
2780         frame_size = iwl4965_fill_beacon_frame(priv,
2781                                 tx_beacon_cmd->frame,
2782                                 iwl4965_broadcast_addr,
2783                                 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
2784
2785         BUG_ON(frame_size > MAX_MPDU_SIZE);
2786         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
2787
2788         if ((rate == IWL_RATE_1M_PLCP) || (rate >= IWL_RATE_2M_PLCP))
2789                 tx_beacon_cmd->tx.rate_n_flags =
2790                         iwl4965_hw_set_rate_n_flags(rate, RATE_MCS_CCK_MSK);
2791         else
2792                 tx_beacon_cmd->tx.rate_n_flags =
2793                         iwl4965_hw_set_rate_n_flags(rate, 0);
2794
2795         tx_beacon_cmd->tx.tx_flags = (TX_CMD_FLG_SEQ_CTL_MSK |
2796                                 TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK);
2797         return (sizeof(*tx_beacon_cmd) + frame_size);
2798 }
2799
2800 /*
2801  * Tell 4965 where to find circular buffer of Tx Frame Descriptors for
2802  * given Tx queue, and enable the DMA channel used for that queue.
2803  *
2804  * 4965 supports up to 16 Tx queues in DRAM, mapped to up to 8 Tx DMA
2805  * channels supported in hardware.
2806  */
2807 int iwl4965_hw_tx_queue_init(struct iwl4965_priv *priv, struct iwl4965_tx_queue *txq)
2808 {
2809         int rc;
2810         unsigned long flags;
2811         int txq_id = txq->q.id;
2812
2813         spin_lock_irqsave(&priv->lock, flags);
2814         rc = iwl4965_grab_nic_access(priv);
2815         if (rc) {
2816                 spin_unlock_irqrestore(&priv->lock, flags);
2817                 return rc;
2818         }
2819
2820         /* Circular buffer (TFD queue in DRAM) physical base address */
2821         iwl4965_write_direct32(priv, FH_MEM_CBBC_QUEUE(txq_id),
2822                              txq->q.dma_addr >> 8);
2823
2824         /* Enable DMA channel, using same id as for TFD queue */
2825         iwl4965_write_direct32(
2826                 priv, IWL_FH_TCSR_CHNL_TX_CONFIG_REG(txq_id),
2827                 IWL_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE |
2828                 IWL_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE_VAL);
2829         iwl4965_release_nic_access(priv);
2830         spin_unlock_irqrestore(&priv->lock, flags);
2831
2832         return 0;
2833 }
2834
2835 int iwl4965_hw_txq_attach_buf_to_tfd(struct iwl4965_priv *priv, void *ptr,
2836                                  dma_addr_t addr, u16 len)
2837 {
2838         int index, is_odd;
2839         struct iwl4965_tfd_frame *tfd = ptr;
2840         u32 num_tbs = IWL_GET_BITS(*tfd, num_tbs);
2841
2842         /* Each TFD can point to a maximum 20 Tx buffers */
2843         if ((num_tbs >= MAX_NUM_OF_TBS) || (num_tbs < 0)) {
2844                 IWL_ERROR("Error can not send more than %d chunks\n",
2845                           MAX_NUM_OF_TBS);
2846                 return -EINVAL;
2847         }
2848
2849         index = num_tbs / 2;
2850         is_odd = num_tbs & 0x1;
2851
2852         if (!is_odd) {
2853                 tfd->pa[index].tb1_addr = cpu_to_le32(addr);
2854                 IWL_SET_BITS(tfd->pa[index], tb1_addr_hi,
2855                              iwl_get_dma_hi_address(addr));
2856                 IWL_SET_BITS(tfd->pa[index], tb1_len, len);
2857         } else {
2858                 IWL_SET_BITS(tfd->pa[index], tb2_addr_lo16,
2859                              (u32) (addr & 0xffff));
2860                 IWL_SET_BITS(tfd->pa[index], tb2_addr_hi20, addr >> 16);
2861                 IWL_SET_BITS(tfd->pa[index], tb2_len, len);
2862         }
2863
2864         IWL_SET_BITS(*tfd, num_tbs, num_tbs + 1);
2865
2866         return 0;
2867 }
2868
2869 static void iwl4965_hw_card_show_info(struct iwl4965_priv *priv)
2870 {
2871         u16 hw_version = priv->eeprom.board_revision_4965;
2872
2873         IWL_DEBUG_INFO("4965ABGN HW Version %u.%u.%u\n",
2874                        ((hw_version >> 8) & 0x0F),
2875                        ((hw_version >> 8) >> 4), (hw_version & 0x00FF));
2876
2877         IWL_DEBUG_INFO("4965ABGN PBA Number %.16s\n",
2878                        priv->eeprom.board_pba_number_4965);
2879 }
2880
2881 #define IWL_TX_CRC_SIZE         4
2882 #define IWL_TX_DELIMITER_SIZE   4
2883
2884 /**
2885  * iwl4965_tx_queue_update_wr_ptr - Set up entry in Tx byte-count array
2886  */
2887 int iwl4965_tx_queue_update_wr_ptr(struct iwl4965_priv *priv,
2888                                    struct iwl4965_tx_queue *txq, u16 byte_cnt)
2889 {
2890         int len;
2891         int txq_id = txq->q.id;
2892         struct iwl4965_shared *shared_data = priv->hw_setting.shared_virt;
2893
2894         if (txq->need_update == 0)
2895                 return 0;
2896
2897         len = byte_cnt + IWL_TX_CRC_SIZE + IWL_TX_DELIMITER_SIZE;
2898
2899         /* Set up byte count within first 256 entries */
2900         IWL_SET_BITS16(shared_data->queues_byte_cnt_tbls[txq_id].
2901                        tfd_offset[txq->q.write_ptr], byte_cnt, len);
2902
2903         /* If within first 64 entries, duplicate at end */
2904         if (txq->q.write_ptr < IWL4965_MAX_WIN_SIZE)
2905                 IWL_SET_BITS16(shared_data->queues_byte_cnt_tbls[txq_id].
2906                         tfd_offset[IWL4965_QUEUE_SIZE + txq->q.write_ptr],
2907                         byte_cnt, len);
2908
2909         return 0;
2910 }
2911
2912 /**
2913  * iwl4965_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
2914  *
2915  * Selects how many and which Rx receivers/antennas/chains to use.
2916  * This should not be used for scan command ... it puts data in wrong place.
2917  */
2918 void iwl4965_set_rxon_chain(struct iwl4965_priv *priv)
2919 {
2920         u8 is_single = is_single_stream(priv);
2921         u8 idle_state, rx_state;
2922
2923         priv->staging_rxon.rx_chain = 0;
2924         rx_state = idle_state = 3;
2925
2926         /* Tell uCode which antennas are actually connected.
2927          * Before first association, we assume all antennas are connected.
2928          * Just after first association, iwl4965_noise_calibration()
2929          *    checks which antennas actually *are* connected. */
2930         priv->staging_rxon.rx_chain |=
2931             cpu_to_le16(priv->valid_antenna << RXON_RX_CHAIN_VALID_POS);
2932
2933         /* How many receivers should we use? */
2934         iwl4965_get_rx_chain_counter(priv, &idle_state, &rx_state);
2935         priv->staging_rxon.rx_chain |=
2936                 cpu_to_le16(rx_state << RXON_RX_CHAIN_MIMO_CNT_POS);
2937         priv->staging_rxon.rx_chain |=
2938                 cpu_to_le16(idle_state << RXON_RX_CHAIN_CNT_POS);
2939
2940         if (!is_single && (rx_state >= 2) &&
2941             !test_bit(STATUS_POWER_PMI, &priv->status))
2942                 priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
2943         else
2944                 priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
2945
2946         IWL_DEBUG_ASSOC("rx chain %X\n", priv->staging_rxon.rx_chain);
2947 }
2948
2949 /**
2950  * sign_extend - Sign extend a value using specified bit as sign-bit
2951  *
2952  * Example: sign_extend(9, 3) would return -7 as bit3 of 1001b is 1
2953  * and bit0..2 is 001b which when sign extended to 1111111111111001b is -7.
2954  *
2955  * @param oper value to sign extend
2956  * @param index 0 based bit index (0<=index<32) to sign bit
2957  */
2958 static s32 sign_extend(u32 oper, int index)
2959 {
2960         u8 shift = 31 - index;
2961
2962         return (s32)(oper << shift) >> shift;
2963 }
2964
2965 /**
2966  * iwl4965_get_temperature - return the calibrated temperature (in Kelvin)
2967  * @statistics: Provides the temperature reading from the uCode
2968  *
2969  * A return of <0 indicates bogus data in the statistics
2970  */
2971 int iwl4965_get_temperature(const struct iwl4965_priv *priv)
2972 {
2973         s32 temperature;
2974         s32 vt;
2975         s32 R1, R2, R3;
2976         u32 R4;
2977
2978         if (test_bit(STATUS_TEMPERATURE, &priv->status) &&
2979                 (priv->statistics.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK)) {
2980                 IWL_DEBUG_TEMP("Running FAT temperature calibration\n");
2981                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[1]);
2982                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[1]);
2983                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[1]);
2984                 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[1]);
2985         } else {
2986                 IWL_DEBUG_TEMP("Running temperature calibration\n");
2987                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[0]);
2988                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[0]);
2989                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[0]);
2990                 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[0]);
2991         }
2992
2993         /*
2994          * Temperature is only 23 bits, so sign extend out to 32.
2995          *
2996          * NOTE If we haven't received a statistics notification yet
2997          * with an updated temperature, use R4 provided to us in the
2998          * "initialize" ALIVE response.
2999          */
3000         if (!test_bit(STATUS_TEMPERATURE, &priv->status))
3001                 vt = sign_extend(R4, 23);
3002         else
3003                 vt = sign_extend(
3004                         le32_to_cpu(priv->statistics.general.temperature), 23);
3005
3006         IWL_DEBUG_TEMP("Calib values R[1-3]: %d %d %d R4: %d\n",
3007                        R1, R2, R3, vt);
3008
3009         if (R3 == R1) {
3010                 IWL_ERROR("Calibration conflict R1 == R3\n");
3011                 return -1;
3012         }
3013
3014         /* Calculate temperature in degrees Kelvin, adjust by 97%.
3015          * Add offset to center the adjustment around 0 degrees Centigrade. */
3016         temperature = TEMPERATURE_CALIB_A_VAL * (vt - R2);
3017         temperature /= (R3 - R1);
3018         temperature = (temperature * 97) / 100 +
3019             TEMPERATURE_CALIB_KELVIN_OFFSET;
3020
3021         IWL_DEBUG_TEMP("Calibrated temperature: %dK, %dC\n", temperature,
3022             KELVIN_TO_CELSIUS(temperature));
3023
3024         return temperature;
3025 }
3026
3027 /* Adjust Txpower only if temperature variance is greater than threshold. */
3028 #define IWL_TEMPERATURE_THRESHOLD   3
3029
3030 /**
3031  * iwl4965_is_temp_calib_needed - determines if new calibration is needed
3032  *
3033  * If the temperature changed has changed sufficiently, then a recalibration
3034  * is needed.
3035  *
3036  * Assumes caller will replace priv->last_temperature once calibration
3037  * executed.
3038  */
3039 static int iwl4965_is_temp_calib_needed(struct iwl4965_priv *priv)
3040 {
3041         int temp_diff;
3042
3043         if (!test_bit(STATUS_STATISTICS, &priv->status)) {
3044                 IWL_DEBUG_TEMP("Temperature not updated -- no statistics.\n");
3045                 return 0;
3046         }
3047
3048         temp_diff = priv->temperature - priv->last_temperature;
3049
3050         /* get absolute value */
3051         if (temp_diff < 0) {
3052                 IWL_DEBUG_POWER("Getting cooler, delta %d, \n", temp_diff);
3053                 temp_diff = -temp_diff;
3054         } else if (temp_diff == 0)
3055                 IWL_DEBUG_POWER("Same temp, \n");
3056         else
3057                 IWL_DEBUG_POWER("Getting warmer, delta %d, \n", temp_diff);
3058
3059         if (temp_diff < IWL_TEMPERATURE_THRESHOLD) {
3060                 IWL_DEBUG_POWER("Thermal txpower calib not needed\n");
3061                 return 0;
3062         }
3063
3064         IWL_DEBUG_POWER("Thermal txpower calib needed\n");
3065
3066         return 1;
3067 }
3068
3069 /* Calculate noise level, based on measurements during network silence just
3070  *   before arriving beacon.  This measurement can be done only if we know
3071  *   exactly when to expect beacons, therefore only when we're associated. */
3072 static void iwl4965_rx_calc_noise(struct iwl4965_priv *priv)
3073 {
3074         struct statistics_rx_non_phy *rx_info
3075                                 = &(priv->statistics.rx.general);
3076         int num_active_rx = 0;
3077         int total_silence = 0;
3078         int bcn_silence_a =
3079                 le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER;
3080         int bcn_silence_b =
3081                 le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER;
3082         int bcn_silence_c =
3083                 le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER;
3084
3085         if (bcn_silence_a) {
3086                 total_silence += bcn_silence_a;
3087                 num_active_rx++;
3088         }
3089         if (bcn_silence_b) {
3090                 total_silence += bcn_silence_b;
3091                 num_active_rx++;
3092         }
3093         if (bcn_silence_c) {
3094                 total_silence += bcn_silence_c;
3095                 num_active_rx++;
3096         }
3097
3098         /* Average among active antennas */
3099         if (num_active_rx)
3100                 priv->last_rx_noise = (total_silence / num_active_rx) - 107;
3101         else
3102                 priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
3103
3104         IWL_DEBUG_CALIB("inband silence a %u, b %u, c %u, dBm %d\n",
3105                         bcn_silence_a, bcn_silence_b, bcn_silence_c,
3106                         priv->last_rx_noise);
3107 }
3108
3109 void iwl4965_hw_rx_statistics(struct iwl4965_priv *priv, struct iwl4965_rx_mem_buffer *rxb)
3110 {
3111         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3112         int change;
3113         s32 temp;
3114
3115         IWL_DEBUG_RX("Statistics notification received (%d vs %d).\n",
3116                      (int)sizeof(priv->statistics), pkt->len);
3117
3118         change = ((priv->statistics.general.temperature !=
3119                    pkt->u.stats.general.temperature) ||
3120                   ((priv->statistics.flag &
3121                     STATISTICS_REPLY_FLG_FAT_MODE_MSK) !=
3122                    (pkt->u.stats.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK)));
3123
3124         memcpy(&priv->statistics, &pkt->u.stats, sizeof(priv->statistics));
3125
3126         set_bit(STATUS_STATISTICS, &priv->status);
3127
3128         /* Reschedule the statistics timer to occur in
3129          * REG_RECALIB_PERIOD seconds to ensure we get a
3130          * thermal update even if the uCode doesn't give
3131          * us one */
3132         mod_timer(&priv->statistics_periodic, jiffies +
3133                   msecs_to_jiffies(REG_RECALIB_PERIOD * 1000));
3134
3135         if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
3136             (pkt->hdr.cmd == STATISTICS_NOTIFICATION)) {
3137                 iwl4965_rx_calc_noise(priv);
3138 #ifdef CONFIG_IWL4965_SENSITIVITY
3139                 queue_work(priv->workqueue, &priv->sensitivity_work);
3140 #endif
3141         }
3142
3143         /* If the hardware hasn't reported a change in
3144          * temperature then don't bother computing a
3145          * calibrated temperature value */
3146         if (!change)
3147                 return;
3148
3149         temp = iwl4965_get_temperature(priv);
3150         if (temp < 0)
3151                 return;
3152
3153         if (priv->temperature != temp) {
3154                 if (priv->temperature)
3155                         IWL_DEBUG_TEMP("Temperature changed "
3156                                        "from %dC to %dC\n",
3157                                        KELVIN_TO_CELSIUS(priv->temperature),
3158                                        KELVIN_TO_CELSIUS(temp));
3159                 else
3160                         IWL_DEBUG_TEMP("Temperature "
3161                                        "initialized to %dC\n",
3162                                        KELVIN_TO_CELSIUS(temp));
3163         }
3164
3165         priv->temperature = temp;
3166         set_bit(STATUS_TEMPERATURE, &priv->status);
3167
3168         if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
3169                      iwl4965_is_temp_calib_needed(priv))
3170                 queue_work(priv->workqueue, &priv->txpower_work);
3171 }
3172
3173 static void iwl4965_add_radiotap(struct iwl4965_priv *priv,
3174                                  struct sk_buff *skb,
3175                                  struct iwl4965_rx_phy_res *rx_start,
3176                                  struct ieee80211_rx_status *stats,
3177                                  u32 ampdu_status)
3178 {
3179         s8 signal = stats->ssi;
3180         s8 noise = 0;
3181         int rate = stats->rate_idx;
3182         u64 tsf = stats->mactime;
3183         __le16 phy_flags_hw = rx_start->phy_flags;
3184         struct iwl4965_rt_rx_hdr {
3185                 struct ieee80211_radiotap_header rt_hdr;
3186                 __le64 rt_tsf;          /* TSF */
3187                 u8 rt_flags;            /* radiotap packet flags */
3188                 u8 rt_rate;             /* rate in 500kb/s */
3189                 __le16 rt_channelMHz;   /* channel in MHz */
3190                 __le16 rt_chbitmask;    /* channel bitfield */
3191                 s8 rt_dbmsignal;        /* signal in dBm, kluged to signed */
3192                 s8 rt_dbmnoise;
3193                 u8 rt_antenna;          /* antenna number */
3194         } __attribute__ ((packed)) *iwl4965_rt;
3195
3196         /* TODO: We won't have enough headroom for HT frames. Fix it later. */
3197         if (skb_headroom(skb) < sizeof(*iwl4965_rt)) {
3198                 if (net_ratelimit())
3199                         printk(KERN_ERR "not enough headroom [%d] for "
3200                                "radiotap head [%zd]\n",
3201                                skb_headroom(skb), sizeof(*iwl4965_rt));
3202                 return;
3203         }
3204
3205         /* put radiotap header in front of 802.11 header and data */
3206         iwl4965_rt = (void *)skb_push(skb, sizeof(*iwl4965_rt));
3207
3208         /* initialise radiotap header */
3209         iwl4965_rt->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
3210         iwl4965_rt->rt_hdr.it_pad = 0;
3211
3212         /* total header + data */
3213         put_unaligned(cpu_to_le16(sizeof(*iwl4965_rt)),
3214                       &iwl4965_rt->rt_hdr.it_len);
3215
3216         /* Indicate all the fields we add to the radiotap header */
3217         put_unaligned(cpu_to_le32((1 << IEEE80211_RADIOTAP_TSFT) |
3218                                   (1 << IEEE80211_RADIOTAP_FLAGS) |
3219                                   (1 << IEEE80211_RADIOTAP_RATE) |
3220                                   (1 << IEEE80211_RADIOTAP_CHANNEL) |
3221                                   (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL) |
3222                                   (1 << IEEE80211_RADIOTAP_DBM_ANTNOISE) |
3223                                   (1 << IEEE80211_RADIOTAP_ANTENNA)),
3224                       &iwl4965_rt->rt_hdr.it_present);
3225
3226         /* Zero the flags, we'll add to them as we go */
3227         iwl4965_rt->rt_flags = 0;
3228
3229         put_unaligned(cpu_to_le64(tsf), &iwl4965_rt->rt_tsf);
3230
3231         iwl4965_rt->rt_dbmsignal = signal;
3232         iwl4965_rt->rt_dbmnoise = noise;
3233
3234         /* Convert the channel frequency and set the flags */
3235         put_unaligned(cpu_to_le16(stats->freq), &iwl4965_rt->rt_channelMHz);
3236         if (!(phy_flags_hw & RX_RES_PHY_FLAGS_BAND_24_MSK))
3237                 put_unaligned(cpu_to_le16(IEEE80211_CHAN_OFDM |
3238                                           IEEE80211_CHAN_5GHZ),
3239                               &iwl4965_rt->rt_chbitmask);
3240         else if (phy_flags_hw & RX_RES_PHY_FLAGS_MOD_CCK_MSK)
3241                 put_unaligned(cpu_to_le16(IEEE80211_CHAN_CCK |
3242                                           IEEE80211_CHAN_2GHZ),
3243                               &iwl4965_rt->rt_chbitmask);
3244         else    /* 802.11g */
3245                 put_unaligned(cpu_to_le16(IEEE80211_CHAN_OFDM |
3246                                           IEEE80211_CHAN_2GHZ),
3247                               &iwl4965_rt->rt_chbitmask);
3248
3249         if (rate == -1)
3250                 iwl4965_rt->rt_rate = 0;
3251         else
3252                 iwl4965_rt->rt_rate = iwl4965_rates[rate].ieee;
3253
3254         /*
3255          * "antenna number"
3256          *
3257          * It seems that the antenna field in the phy flags value
3258          * is actually a bitfield. This is undefined by radiotap,
3259          * it wants an actual antenna number but I always get "7"
3260          * for most legacy frames I receive indicating that the
3261          * same frame was received on all three RX chains.
3262          *
3263          * I think this field should be removed in favour of a
3264          * new 802.11n radiotap field "RX chains" that is defined
3265          * as a bitmask.
3266          */
3267         iwl4965_rt->rt_antenna =
3268                 le16_to_cpu(phy_flags_hw & RX_RES_PHY_FLAGS_ANTENNA_MSK) >> 4;
3269
3270         /* set the preamble flag if appropriate */
3271         if (phy_flags_hw & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
3272                 iwl4965_rt->rt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;
3273
3274         stats->flag |= RX_FLAG_RADIOTAP;
3275 }
3276
3277 static void iwl4965_handle_data_packet(struct iwl4965_priv *priv, int is_data,
3278                                        int include_phy,
3279                                        struct iwl4965_rx_mem_buffer *rxb,
3280                                        struct ieee80211_rx_status *stats)
3281 {
3282         struct iwl4965_rx_packet *pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
3283         struct iwl4965_rx_phy_res *rx_start = (include_phy) ?
3284             (struct iwl4965_rx_phy_res *)&(pkt->u.raw[0]) : NULL;
3285         struct ieee80211_hdr *hdr;
3286         u16 len;
3287         __le32 *rx_end;
3288         unsigned int skblen;
3289         u32 ampdu_status;
3290
3291         if (!include_phy && priv->last_phy_res[0])
3292                 rx_start = (struct iwl4965_rx_phy_res *)&priv->last_phy_res[1];
3293
3294         if (!rx_start) {
3295                 IWL_ERROR("MPDU frame without a PHY data\n");
3296                 return;
3297         }
3298         if (include_phy) {
3299                 hdr = (struct ieee80211_hdr *)((u8 *) & rx_start[1] +
3300                                                rx_start->cfg_phy_cnt);
3301
3302                 len = le16_to_cpu(rx_start->byte_count);
3303
3304                 rx_end = (__le32 *) ((u8 *) & pkt->u.raw[0] +
3305                                   sizeof(struct iwl4965_rx_phy_res) +
3306                                   rx_start->cfg_phy_cnt + len);
3307
3308         } else {
3309                 struct iwl4965_rx_mpdu_res_start *amsdu =
3310                     (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw;
3311
3312                 hdr = (struct ieee80211_hdr *)(pkt->u.raw +
3313                                sizeof(struct iwl4965_rx_mpdu_res_start));
3314                 len =  le16_to_cpu(amsdu->byte_count);
3315                 rx_start->byte_count = amsdu->byte_count;
3316                 rx_end = (__le32 *) (((u8 *) hdr) + len);
3317         }
3318         if (len > priv->hw_setting.max_pkt_size || len < 16) {
3319                 IWL_WARNING("byte count out of range [16,4K] : %d\n", len);
3320                 return;
3321         }
3322
3323         ampdu_status = le32_to_cpu(*rx_end);
3324         skblen = ((u8 *) rx_end - (u8 *) & pkt->u.raw[0]) + sizeof(u32);
3325
3326         /* start from MAC */
3327         skb_reserve(rxb->skb, (void *)hdr - (void *)pkt);
3328         skb_put(rxb->skb, len); /* end where data ends */
3329
3330         /* We only process data packets if the interface is open */
3331         if (unlikely(!priv->is_open)) {
3332                 IWL_DEBUG_DROP_LIMIT
3333                     ("Dropping packet while interface is not open.\n");
3334                 return;
3335         }
3336
3337         stats->flag = 0;
3338         hdr = (struct ieee80211_hdr *)rxb->skb->data;
3339
3340         if (iwl4965_param_hwcrypto)
3341                 iwl4965_set_decrypted_flag(priv, rxb->skb, ampdu_status, stats);
3342
3343         if (priv->add_radiotap)
3344                 iwl4965_add_radiotap(priv, rxb->skb, rx_start, stats, ampdu_status);
3345
3346         ieee80211_rx_irqsafe(priv->hw, rxb->skb, stats);
3347         priv->alloc_rxb_skb--;
3348         rxb->skb = NULL;
3349 #ifdef LED
3350         priv->led_packets += len;
3351         iwl4965_setup_activity_timer(priv);
3352 #endif
3353 }
3354
3355 /* Calc max signal level (dBm) among 3 possible receivers */
3356 static int iwl4965_calc_rssi(struct iwl4965_rx_phy_res *rx_resp)
3357 {
3358         /* data from PHY/DSP regarding signal strength, etc.,
3359          *   contents are always there, not configurable by host.  */
3360         struct iwl4965_rx_non_cfg_phy *ncphy =
3361             (struct iwl4965_rx_non_cfg_phy *)rx_resp->non_cfg_phy;
3362         u32 agc = (le16_to_cpu(ncphy->agc_info) & IWL_AGC_DB_MASK)
3363                         >> IWL_AGC_DB_POS;
3364
3365         u32 valid_antennae =
3366             (le16_to_cpu(rx_resp->phy_flags) & RX_PHY_FLAGS_ANTENNAE_MASK)
3367                         >> RX_PHY_FLAGS_ANTENNAE_OFFSET;
3368         u8 max_rssi = 0;
3369         u32 i;
3370
3371         /* Find max rssi among 3 possible receivers.
3372          * These values are measured by the digital signal processor (DSP).
3373          * They should stay fairly constant even as the signal strength varies,
3374          *   if the radio's automatic gain control (AGC) is working right.
3375          * AGC value (see below) will provide the "interesting" info. */
3376         for (i = 0; i < 3; i++)
3377                 if (valid_antennae & (1 << i))
3378                         max_rssi = max(ncphy->rssi_info[i << 1], max_rssi);
3379
3380         IWL_DEBUG_STATS("Rssi In A %d B %d C %d Max %d AGC dB %d\n",
3381                 ncphy->rssi_info[0], ncphy->rssi_info[2], ncphy->rssi_info[4],
3382                 max_rssi, agc);
3383
3384         /* dBm = max_rssi dB - agc dB - constant.
3385          * Higher AGC (higher radio gain) means lower signal. */
3386         return (max_rssi - agc - IWL_RSSI_OFFSET);
3387 }
3388
3389 #ifdef CONFIG_IWL4965_HT
3390
3391 /* Parsed Information Elements */
3392 struct ieee802_11_elems {
3393         u8 *ds_params;
3394         u8 ds_params_len;
3395         u8 *tim;
3396         u8 tim_len;
3397         u8 *ibss_params;
3398         u8 ibss_params_len;
3399         u8 *erp_info;
3400         u8 erp_info_len;
3401         u8 *ht_cap_param;
3402         u8 ht_cap_param_len;
3403         u8 *ht_extra_param;
3404         u8 ht_extra_param_len;
3405 };
3406
3407 static int parse_elems(u8 *start, size_t len, struct ieee802_11_elems *elems)
3408 {
3409         size_t left = len;
3410         u8 *pos = start;
3411         int unknown = 0;
3412
3413         memset(elems, 0, sizeof(*elems));
3414
3415         while (left >= 2) {
3416                 u8 id, elen;
3417
3418                 id = *pos++;
3419                 elen = *pos++;
3420                 left -= 2;
3421
3422                 if (elen > left)
3423                         return -1;
3424
3425                 switch (id) {
3426                 case WLAN_EID_DS_PARAMS:
3427                         elems->ds_params = pos;
3428                         elems->ds_params_len = elen;
3429                         break;
3430                 case WLAN_EID_TIM:
3431                         elems->tim = pos;
3432                         elems->tim_len = elen;
3433                         break;
3434                 case WLAN_EID_IBSS_PARAMS:
3435                         elems->ibss_params = pos;
3436                         elems->ibss_params_len = elen;
3437                         break;
3438                 case WLAN_EID_ERP_INFO:
3439                         elems->erp_info = pos;
3440                         elems->erp_info_len = elen;
3441                         break;
3442                 case WLAN_EID_HT_CAPABILITY:
3443                         elems->ht_cap_param = pos;
3444                         elems->ht_cap_param_len = elen;
3445                         break;
3446                 case WLAN_EID_HT_EXTRA_INFO:
3447                         elems->ht_extra_param = pos;
3448                         elems->ht_extra_param_len = elen;
3449                         break;
3450                 default:
3451                         unknown++;
3452                         break;
3453                 }
3454
3455                 left -= elen;
3456                 pos += elen;
3457         }
3458
3459         return 0;
3460 }
3461
3462 void iwl4965_init_ht_hw_capab(struct ieee80211_ht_info *ht_info,
3463                               enum ieee80211_band band)
3464 {
3465         ht_info->cap = 0;
3466         memset(ht_info->supp_mcs_set, 0, 16);
3467
3468         ht_info->ht_supported = 1;
3469
3470         if (band == IEEE80211_BAND_5GHZ) {
3471                 ht_info->cap |= (u16)IEEE80211_HT_CAP_SUP_WIDTH;
3472                 ht_info->cap |= (u16)IEEE80211_HT_CAP_SGI_40;
3473                 ht_info->supp_mcs_set[4] = 0x01;
3474         }
3475         ht_info->cap |= (u16)IEEE80211_HT_CAP_GRN_FLD;
3476         ht_info->cap |= (u16)IEEE80211_HT_CAP_SGI_20;
3477         ht_info->cap |= (u16)(IEEE80211_HT_CAP_MIMO_PS &
3478                              (IWL_MIMO_PS_NONE << 2));
3479         if (iwl4965_param_amsdu_size_8K) {
3480                 printk(KERN_DEBUG "iwl4965 in A-MSDU 8K support mode\n");
3481                 ht_info->cap |= (u16)IEEE80211_HT_CAP_MAX_AMSDU;
3482         }
3483
3484         ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
3485         ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
3486
3487         ht_info->supp_mcs_set[0] = 0xFF;
3488         ht_info->supp_mcs_set[1] = 0xFF;
3489 }
3490 #endif /* CONFIG_IWL4965_HT */
3491
3492 static void iwl4965_sta_modify_ps_wake(struct iwl4965_priv *priv, int sta_id)
3493 {
3494         unsigned long flags;
3495
3496         spin_lock_irqsave(&priv->sta_lock, flags);
3497         priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
3498         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
3499         priv->stations[sta_id].sta.sta.modify_mask = 0;
3500         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3501         spin_unlock_irqrestore(&priv->sta_lock, flags);
3502
3503         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
3504 }
3505
3506 static void iwl4965_update_ps_mode(struct iwl4965_priv *priv, u16 ps_bit, u8 *addr)
3507 {
3508         /* FIXME: need locking over ps_status ??? */
3509         u8 sta_id = iwl4965_hw_find_station(priv, addr);
3510
3511         if (sta_id != IWL_INVALID_STATION) {
3512                 u8 sta_awake = priv->stations[sta_id].
3513                                 ps_status == STA_PS_STATUS_WAKE;
3514
3515                 if (sta_awake && ps_bit)
3516                         priv->stations[sta_id].ps_status = STA_PS_STATUS_SLEEP;
3517                 else if (!sta_awake && !ps_bit) {
3518                         iwl4965_sta_modify_ps_wake(priv, sta_id);
3519                         priv->stations[sta_id].ps_status = STA_PS_STATUS_WAKE;
3520                 }
3521         }
3522 }
3523
3524 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
3525
3526 /* Called for REPLY_4965_RX (legacy ABG frames), or
3527  * REPLY_RX_MPDU_CMD (HT high-throughput N frames). */
3528 static void iwl4965_rx_reply_rx(struct iwl4965_priv *priv,
3529                                 struct iwl4965_rx_mem_buffer *rxb)
3530 {
3531         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3532         /* Use phy data (Rx signal strength, etc.) contained within
3533          *   this rx packet for legacy frames,
3534          *   or phy data cached from REPLY_RX_PHY_CMD for HT frames. */
3535         int include_phy = (pkt->hdr.cmd == REPLY_4965_RX);
3536         struct iwl4965_rx_phy_res *rx_start = (include_phy) ?
3537                 (struct iwl4965_rx_phy_res *)&(pkt->u.raw[0]) :
3538                 (struct iwl4965_rx_phy_res *)&priv->last_phy_res[1];
3539         __le32 *rx_end;
3540         unsigned int len = 0;
3541         struct ieee80211_hdr *header;
3542         u16 fc;
3543         struct ieee80211_rx_status stats = {
3544                 .mactime = le64_to_cpu(rx_start->timestamp),
3545                 .freq = ieee80211chan2mhz(le16_to_cpu(rx_start->channel)),
3546                 .band =
3547                         (rx_start->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ?
3548                         IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ,
3549                 .antenna = 0,
3550                 .rate_idx = iwl4965_rate_index_from_plcp(
3551                                 le32_to_cpu(rx_start->rate_n_flags)),
3552                 .flag = 0,
3553         };
3554         u8 network_packet;
3555
3556         if ((unlikely(rx_start->cfg_phy_cnt > 20))) {
3557                 IWL_DEBUG_DROP
3558                         ("dsp size out of range [0,20]: "
3559                          "%d/n", rx_start->cfg_phy_cnt);
3560                 return;
3561         }
3562         if (!include_phy) {
3563                 if (priv->last_phy_res[0])
3564                         rx_start = (struct iwl4965_rx_phy_res *)
3565                                 &priv->last_phy_res[1];
3566                 else
3567                         rx_start = NULL;
3568         }
3569
3570         if (!rx_start) {
3571                 IWL_ERROR("MPDU frame without a PHY data\n");
3572                 return;
3573         }
3574
3575         if (include_phy) {
3576                 header = (struct ieee80211_hdr *)((u8 *) & rx_start[1]
3577                                                   + rx_start->cfg_phy_cnt);
3578
3579                 len = le16_to_cpu(rx_start->byte_count);
3580                 rx_end = (__le32 *) (pkt->u.raw + rx_start->cfg_phy_cnt +
3581                                   sizeof(struct iwl4965_rx_phy_res) + len);
3582         } else {
3583                 struct iwl4965_rx_mpdu_res_start *amsdu =
3584                         (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw;
3585
3586                 header = (void *)(pkt->u.raw +
3587                         sizeof(struct iwl4965_rx_mpdu_res_start));
3588                 len = le16_to_cpu(amsdu->byte_count);
3589                 rx_end = (__le32 *) (pkt->u.raw +
3590                         sizeof(struct iwl4965_rx_mpdu_res_start) + len);
3591         }
3592
3593         if (!(*rx_end & RX_RES_STATUS_NO_CRC32_ERROR) ||
3594             !(*rx_end & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
3595                 IWL_DEBUG_RX("Bad CRC or FIFO: 0x%08X.\n",
3596                                 le32_to_cpu(*rx_end));
3597                 return;
3598         }
3599
3600         priv->ucode_beacon_time = le32_to_cpu(rx_start->beacon_time_stamp);
3601
3602         /* Find max signal strength (dBm) among 3 antenna/receiver chains */
3603         stats.ssi = iwl4965_calc_rssi(rx_start);
3604
3605         /* Meaningful noise values are available only from beacon statistics,
3606          *   which are gathered only when associated, and indicate noise
3607          *   only for the associated network channel ...
3608          * Ignore these noise values while scanning (other channels) */
3609         if (iwl4965_is_associated(priv) &&
3610             !test_bit(STATUS_SCANNING, &priv->status)) {
3611                 stats.noise = priv->last_rx_noise;
3612                 stats.signal = iwl4965_calc_sig_qual(stats.ssi, stats.noise);
3613         } else {
3614                 stats.noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
3615                 stats.signal = iwl4965_calc_sig_qual(stats.ssi, 0);
3616         }
3617
3618         /* Reset beacon noise level if not associated. */
3619         if (!iwl4965_is_associated(priv))
3620                 priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
3621
3622 #ifdef CONFIG_IWL4965_DEBUG
3623         /* TODO:  Parts of iwl4965_report_frame are broken for 4965 */
3624         if (iwl4965_debug_level & (IWL_DL_RX))
3625                 /* Set "1" to report good data frames in groups of 100 */
3626                 iwl4965_report_frame(priv, pkt, header, 1);
3627
3628         if (iwl4965_debug_level & (IWL_DL_RX | IWL_DL_STATS))
3629         IWL_DEBUG_RX("Rssi %d, noise %d, qual %d, TSF %lu\n",
3630                 stats.ssi, stats.noise, stats.signal,
3631                  (long unsigned int)le64_to_cpu(rx_start->timestamp));
3632 #endif
3633
3634         network_packet = iwl4965_is_network_packet(priv, header);
3635         if (network_packet) {
3636                 priv->last_rx_rssi = stats.ssi;
3637                 priv->last_beacon_time =  priv->ucode_beacon_time;
3638                 priv->last_tsf = le64_to_cpu(rx_start->timestamp);
3639         }
3640
3641         fc = le16_to_cpu(header->frame_control);
3642         switch (fc & IEEE80211_FCTL_FTYPE) {
3643         case IEEE80211_FTYPE_MGMT:
3644
3645                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
3646                         iwl4965_update_ps_mode(priv, fc  & IEEE80211_FCTL_PM,
3647                                                 header->addr2);
3648                 switch (fc & IEEE80211_FCTL_STYPE) {
3649                 case IEEE80211_STYPE_PROBE_RESP:
3650                 case IEEE80211_STYPE_BEACON:
3651                         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA &&
3652                              !compare_ether_addr(header->addr2, priv->bssid)) ||
3653                             (priv->iw_mode == IEEE80211_IF_TYPE_IBSS &&
3654                              !compare_ether_addr(header->addr3, priv->bssid))) {
3655                                 struct ieee80211_mgmt *mgmt =
3656                                         (struct ieee80211_mgmt *)header;
3657                                 u64 timestamp =
3658                                         le64_to_cpu(mgmt->u.beacon.timestamp);
3659
3660                                 priv->timestamp0 = timestamp & 0xFFFFFFFF;
3661                                 priv->timestamp1 =
3662                                         (timestamp >> 32) & 0xFFFFFFFF;
3663                                 priv->beacon_int = le16_to_cpu(
3664                                     mgmt->u.beacon.beacon_int);
3665                                 if (priv->call_post_assoc_from_beacon &&
3666                                     (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
3667                                         priv->call_post_assoc_from_beacon = 0;
3668                                         queue_work(priv->workqueue,
3669                                             &priv->post_associate.work);
3670                                 }
3671                         }
3672                         break;
3673
3674                 case IEEE80211_STYPE_ACTION:
3675                         break;
3676
3677                         /*
3678                          * TODO: Use the new callback function from
3679                          * mac80211 instead of sniffing these packets.
3680                          */
3681                 case IEEE80211_STYPE_ASSOC_RESP:
3682                 case IEEE80211_STYPE_REASSOC_RESP:
3683                         if (network_packet) {
3684 #ifdef CONFIG_IWL4965_HT
3685                                 u8 *pos = NULL;
3686                                 struct ieee802_11_elems elems;
3687 #endif                          /*CONFIG_IWL4965_HT */
3688                                 struct ieee80211_mgmt *mgnt =
3689                                         (struct ieee80211_mgmt *)header;
3690
3691                                 /* We have just associated, give some
3692                                  * time for the 4-way handshake if
3693                                  * any. Don't start scan too early. */
3694                                 priv->next_scan_jiffies = jiffies +
3695                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
3696
3697                                 priv->assoc_id = (~((1 << 15) | (1 << 14))
3698                                         & le16_to_cpu(mgnt->u.assoc_resp.aid));
3699                                 priv->assoc_capability =
3700                                         le16_to_cpu(
3701                                                 mgnt->u.assoc_resp.capab_info);
3702 #ifdef CONFIG_IWL4965_HT
3703                                 pos = mgnt->u.assoc_resp.variable;
3704                                 if (!parse_elems(pos,
3705                                                  len - (pos - (u8 *) mgnt),
3706                                                  &elems)) {
3707                                         if (elems.ht_extra_param &&
3708                                             elems.ht_cap_param)
3709                                                 break;
3710                                 }
3711 #endif                          /*CONFIG_IWL4965_HT */
3712                                 /* assoc_id is 0 no association */
3713                                 if (!priv->assoc_id)
3714                                         break;
3715                                 if (priv->beacon_int)
3716                                         queue_work(priv->workqueue,
3717                                             &priv->post_associate.work);
3718                                 else
3719                                         priv->call_post_assoc_from_beacon = 1;
3720                         }
3721
3722                         break;
3723
3724                 case IEEE80211_STYPE_PROBE_REQ:
3725                         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
3726                             !iwl4965_is_associated(priv)) {
3727                                 DECLARE_MAC_BUF(mac1);
3728                                 DECLARE_MAC_BUF(mac2);
3729                                 DECLARE_MAC_BUF(mac3);
3730
3731                                 IWL_DEBUG_DROP("Dropping (non network): "
3732                                                "%s, %s, %s\n",
3733                                                print_mac(mac1, header->addr1),
3734                                                print_mac(mac2, header->addr2),
3735                                                print_mac(mac3, header->addr3));
3736                                 return;
3737                         }
3738                 }
3739                 iwl4965_handle_data_packet(priv, 0, include_phy, rxb, &stats);
3740                 break;
3741
3742         case IEEE80211_FTYPE_CTL:
3743 #ifdef CONFIG_IWL4965_HT
3744                 switch (fc & IEEE80211_FCTL_STYPE) {
3745                 case IEEE80211_STYPE_BACK_REQ:
3746                         IWL_DEBUG_HT("IEEE80211_STYPE_BACK_REQ arrived\n");
3747                         iwl4965_handle_data_packet(priv, 0, include_phy,
3748                                                 rxb, &stats);
3749                         break;
3750                 default:
3751                         break;
3752                 }
3753 #endif
3754                 break;
3755
3756         case IEEE80211_FTYPE_DATA: {
3757                 DECLARE_MAC_BUF(mac1);
3758                 DECLARE_MAC_BUF(mac2);
3759                 DECLARE_MAC_BUF(mac3);
3760
3761                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
3762                         iwl4965_update_ps_mode(priv, fc  & IEEE80211_FCTL_PM,
3763                                                 header->addr2);
3764
3765                 if (unlikely(!network_packet))
3766                         IWL_DEBUG_DROP("Dropping (non network): "
3767                                        "%s, %s, %s\n",
3768                                        print_mac(mac1, header->addr1),
3769                                        print_mac(mac2, header->addr2),
3770                                        print_mac(mac3, header->addr3));
3771                 else if (unlikely(iwl4965_is_duplicate_packet(priv, header)))
3772                         IWL_DEBUG_DROP("Dropping (dup): %s, %s, %s\n",
3773                                        print_mac(mac1, header->addr1),
3774                                        print_mac(mac2, header->addr2),
3775                                        print_mac(mac3, header->addr3));
3776                 else
3777                         iwl4965_handle_data_packet(priv, 1, include_phy, rxb,
3778                                                    &stats);
3779                 break;
3780         }
3781         default:
3782                 break;
3783
3784         }
3785 }
3786
3787 /* Cache phy data (Rx signal strength, etc) for HT frame (REPLY_RX_PHY_CMD).
3788  * This will be used later in iwl4965_rx_reply_rx() for REPLY_RX_MPDU_CMD. */
3789 static void iwl4965_rx_reply_rx_phy(struct iwl4965_priv *priv,
3790                                     struct iwl4965_rx_mem_buffer *rxb)
3791 {
3792         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3793         priv->last_phy_res[0] = 1;
3794         memcpy(&priv->last_phy_res[1], &(pkt->u.raw[0]),
3795                sizeof(struct iwl4965_rx_phy_res));
3796 }
3797
3798 static void iwl4965_rx_missed_beacon_notif(struct iwl4965_priv *priv,
3799                                            struct iwl4965_rx_mem_buffer *rxb)
3800
3801 {
3802 #ifdef CONFIG_IWL4965_SENSITIVITY
3803         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3804         struct iwl4965_missed_beacon_notif *missed_beacon;
3805
3806         missed_beacon = &pkt->u.missed_beacon;
3807         if (le32_to_cpu(missed_beacon->consequtive_missed_beacons) > 5) {
3808                 IWL_DEBUG_CALIB("missed bcn cnsq %d totl %d rcd %d expctd %d\n",
3809                     le32_to_cpu(missed_beacon->consequtive_missed_beacons),
3810                     le32_to_cpu(missed_beacon->total_missed_becons),
3811                     le32_to_cpu(missed_beacon->num_recvd_beacons),
3812                     le32_to_cpu(missed_beacon->num_expected_beacons));
3813                 priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
3814                 if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)))
3815                         queue_work(priv->workqueue, &priv->sensitivity_work);
3816         }
3817 #endif /*CONFIG_IWL4965_SENSITIVITY*/
3818 }
3819
3820 #ifdef CONFIG_IWL4965_HT
3821
3822 /**
3823  * iwl4965_sta_modify_enable_tid_tx - Enable Tx for this TID in station table
3824  */
3825 static void iwl4965_sta_modify_enable_tid_tx(struct iwl4965_priv *priv,
3826                                          int sta_id, int tid)
3827 {
3828         unsigned long flags;
3829
3830         /* Remove "disable" flag, to enable Tx for this TID */
3831         spin_lock_irqsave(&priv->sta_lock, flags);
3832         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
3833         priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
3834         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3835         spin_unlock_irqrestore(&priv->sta_lock, flags);
3836
3837         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
3838 }
3839
3840 /**
3841  * iwl4965_tx_status_reply_compressed_ba - Update tx status from block-ack
3842  *
3843  * Go through block-ack's bitmap of ACK'd frames, update driver's record of
3844  * ACK vs. not.  This gets sent to mac80211, then to rate scaling algo.
3845  */
3846 static int iwl4965_tx_status_reply_compressed_ba(struct iwl4965_priv *priv,
3847                                                  struct iwl4965_ht_agg *agg,
3848                                                  struct iwl4965_compressed_ba_resp*
3849                                                  ba_resp)
3850
3851 {
3852         int i, sh, ack;
3853         u16 seq_ctl = le16_to_cpu(ba_resp->seq_ctl);
3854         u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
3855         u64 bitmap;
3856         int successes = 0;
3857         struct ieee80211_tx_status *tx_status;
3858
3859         if (unlikely(!agg->wait_for_ba))  {
3860                 IWL_ERROR("Received BA when not expected\n");
3861                 return -EINVAL;
3862         }
3863
3864         /* Mark that the expected block-ack response arrived */
3865         agg->wait_for_ba = 0;
3866         IWL_DEBUG_TX_REPLY("BA %d %d\n", agg->start_idx, ba_resp->seq_ctl);
3867
3868         /* Calculate shift to align block-ack bits with our Tx window bits */
3869         sh = agg->start_idx - SEQ_TO_INDEX(seq_ctl>>4);
3870         if (sh < 0) /* tbw something is wrong with indices */
3871                 sh += 0x100;
3872
3873         /* don't use 64-bit values for now */
3874         bitmap = le64_to_cpu(ba_resp->bitmap) >> sh;
3875
3876         if (agg->frame_count > (64 - sh)) {
3877                 IWL_DEBUG_TX_REPLY("more frames than bitmap size");
3878                 return -1;
3879         }
3880
3881         /* check for success or failure according to the
3882          * transmitted bitmap and block-ack bitmap */
3883         bitmap &= agg->bitmap;
3884
3885         /* For each frame attempted in aggregation,
3886          * update driver's record of tx frame's status. */
3887         for (i = 0; i < agg->frame_count ; i++) {
3888                 ack = bitmap & (1 << i);
3889                 successes += !!ack;
3890                 IWL_DEBUG_TX_REPLY("%s ON i=%d idx=%d raw=%d\n",
3891                         ack? "ACK":"NACK", i, (agg->start_idx + i) & 0xff,
3892                         agg->start_idx + i);
3893         }
3894
3895         tx_status = &priv->txq[scd_flow].txb[agg->start_idx].status;
3896         tx_status->flags = IEEE80211_TX_STATUS_ACK;
3897         tx_status->flags |= IEEE80211_TX_STATUS_AMPDU;
3898         tx_status->ampdu_ack_map = successes;
3899         tx_status->ampdu_ack_len = agg->frame_count;
3900         /* FIXME Wrong rate
3901         tx_status->control.tx_rate = agg->rate_n_flags;
3902         */
3903
3904         IWL_DEBUG_TX_REPLY("Bitmap %llx\n", bitmap);
3905
3906         return 0;
3907 }
3908
3909 /**
3910  * iwl4965_tx_queue_stop_scheduler - Stop queue, but keep configuration
3911  */
3912 static void iwl4965_tx_queue_stop_scheduler(struct iwl4965_priv *priv,
3913                                             u16 txq_id)
3914 {
3915         /* Simply stop the queue, but don't change any configuration;
3916          * the SCD_ACT_EN bit is the write-enable mask for the ACTIVE bit. */
3917         iwl4965_write_prph(priv,
3918                 KDR_SCD_QUEUE_STATUS_BITS(txq_id),
3919                 (0 << SCD_QUEUE_STTS_REG_POS_ACTIVE)|
3920                 (1 << SCD_QUEUE_STTS_REG_POS_SCD_ACT_EN));
3921 }
3922
3923 /**
3924  * txq_id must be greater than IWL_BACK_QUEUE_FIRST_ID
3925  */
3926 static int iwl4965_tx_queue_agg_disable(struct iwl4965_priv *priv, u16 txq_id,
3927                                         u16 ssn_idx, u8 tx_fifo)
3928 {
3929         if (IWL_BACK_QUEUE_FIRST_ID > txq_id) {
3930                 IWL_WARNING("queue number too small: %d, must be > %d\n",
3931                                 txq_id, IWL_BACK_QUEUE_FIRST_ID);
3932                 return -EINVAL;
3933         }
3934
3935         iwl4965_tx_queue_stop_scheduler(priv, txq_id);
3936
3937         iwl4965_clear_bits_prph(priv, KDR_SCD_QUEUECHAIN_SEL, (1 << txq_id));
3938
3939         priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
3940         priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
3941         /* supposes that ssn_idx is valid (!= 0xFFF) */
3942         iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
3943
3944         iwl4965_clear_bits_prph(priv, KDR_SCD_INTERRUPT_MASK, (1 << txq_id));
3945         iwl4965_txq_ctx_deactivate(priv, txq_id);
3946         iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 0);
3947
3948         return 0;
3949 }
3950
3951 int iwl4965_check_empty_hw_queue(struct iwl4965_priv *priv, int sta_id,
3952                                          u8 tid, int txq_id)
3953 {
3954         struct iwl4965_queue *q = &priv->txq[txq_id].q;
3955         u8 *addr = priv->stations[sta_id].sta.sta.addr;
3956         struct iwl4965_tid_data *tid_data = &priv->stations[sta_id].tid[tid];
3957
3958         switch (priv->stations[sta_id].tid[tid].agg.state) {
3959         case IWL_EMPTYING_HW_QUEUE_DELBA:
3960                 /* We are reclaiming the last packet of the */
3961                 /* aggregated HW queue */
3962                 if (txq_id  == tid_data->agg.txq_id &&
3963                     q->read_ptr == q->write_ptr) {
3964                         u16 ssn = SEQ_TO_SN(tid_data->seq_number);
3965                         int tx_fifo = default_tid_to_tx_fifo[tid];
3966                         IWL_DEBUG_HT("HW queue empty: continue DELBA flow\n");
3967                         iwl4965_tx_queue_agg_disable(priv, txq_id,
3968                                                      ssn, tx_fifo);
3969                         tid_data->agg.state = IWL_AGG_OFF;
3970                         ieee80211_stop_tx_ba_cb_irqsafe(priv->hw, addr, tid);
3971                 }
3972                 break;
3973         case IWL_EMPTYING_HW_QUEUE_ADDBA:
3974                 /* We are reclaiming the last packet of the queue */
3975                 if (tid_data->tfds_in_queue == 0) {
3976                         IWL_DEBUG_HT("HW queue empty: continue ADDBA flow\n");
3977                         tid_data->agg.state = IWL_AGG_ON;
3978                         ieee80211_start_tx_ba_cb_irqsafe(priv->hw, addr, tid);
3979                 }
3980                 break;
3981         }
3982         return 0;
3983 }
3984
3985 /**
3986  * iwl4965_queue_dec_wrap - Decrement queue index, wrap back to end if needed
3987  * @index -- current index
3988  * @n_bd -- total number of entries in queue (s/b power of 2)
3989  */
3990 static inline int iwl4965_queue_dec_wrap(int index, int n_bd)
3991 {
3992         return (index == 0) ? n_bd - 1 : index - 1;
3993 }
3994
3995 /**
3996  * iwl4965_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
3997  *
3998  * Handles block-acknowledge notification from device, which reports success
3999  * of frames sent via aggregation.
4000  */
4001 static void iwl4965_rx_reply_compressed_ba(struct iwl4965_priv *priv,
4002                                            struct iwl4965_rx_mem_buffer *rxb)
4003 {
4004         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
4005         struct iwl4965_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba;
4006         int index;
4007         struct iwl4965_tx_queue *txq = NULL;
4008         struct iwl4965_ht_agg *agg;
4009         DECLARE_MAC_BUF(mac);
4010
4011         /* "flow" corresponds to Tx queue */
4012         u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
4013
4014         /* "ssn" is start of block-ack Tx window, corresponds to index
4015          * (in Tx queue's circular buffer) of first TFD/frame in window */
4016         u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
4017
4018         if (scd_flow >= ARRAY_SIZE(priv->txq)) {
4019                 IWL_ERROR("BUG_ON scd_flow is bigger than number of queues");
4020                 return;
4021         }
4022
4023         txq = &priv->txq[scd_flow];
4024         agg = &priv->stations[ba_resp->sta_id].tid[ba_resp->tid].agg;
4025
4026         /* Find index just before block-ack window */
4027         index = iwl4965_queue_dec_wrap(ba_resp_scd_ssn & 0xff, txq->q.n_bd);
4028
4029         /* TODO: Need to get this copy more safely - now good for debug */
4030
4031         IWL_DEBUG_TX_REPLY("REPLY_COMPRESSED_BA [%d]Received from %s, "
4032                            "sta_id = %d\n",
4033                            agg->wait_for_ba,
4034                            print_mac(mac, (u8*) &ba_resp->sta_addr_lo32),
4035                            ba_resp->sta_id);
4036         IWL_DEBUG_TX_REPLY("TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = "
4037                            "%d, scd_ssn = %d\n",
4038                            ba_resp->tid,
4039                            ba_resp->seq_ctl,
4040                            ba_resp->bitmap,
4041                            ba_resp->scd_flow,
4042                            ba_resp->scd_ssn);
4043         IWL_DEBUG_TX_REPLY("DAT start_idx = %d, bitmap = 0x%llx \n",
4044                            agg->start_idx,
4045                            agg->bitmap);
4046
4047         /* Update driver's record of ACK vs. not for each frame in window */
4048         iwl4965_tx_status_reply_compressed_ba(priv, agg, ba_resp);
4049
4050         /* Release all TFDs before the SSN, i.e. all TFDs in front of
4051          * block-ack window (we assume that they've been successfully
4052          * transmitted ... if not, it's too late anyway). */
4053         if (txq->q.read_ptr != (ba_resp_scd_ssn & 0xff)) {
4054                 int freed = iwl4965_tx_queue_reclaim(priv, scd_flow, index);
4055                 priv->stations[ba_resp->sta_id].
4056                         tid[ba_resp->tid].tfds_in_queue -= freed;
4057                 if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
4058                         priv->mac80211_registered &&
4059                         agg->state != IWL_EMPTYING_HW_QUEUE_DELBA)
4060                         ieee80211_wake_queue(priv->hw, scd_flow);
4061                 iwl4965_check_empty_hw_queue(priv, ba_resp->sta_id,
4062                         ba_resp->tid, scd_flow);
4063         }
4064 }
4065
4066 /**
4067  * iwl4965_tx_queue_set_q2ratid - Map unique receiver/tid combination to a queue
4068  */
4069 static int iwl4965_tx_queue_set_q2ratid(struct iwl4965_priv *priv, u16 ra_tid,
4070                                         u16 txq_id)
4071 {
4072         u32 tbl_dw_addr;
4073         u32 tbl_dw;
4074         u16 scd_q2ratid;
4075
4076         scd_q2ratid = ra_tid & SCD_QUEUE_RA_TID_MAP_RATID_MSK;
4077
4078         tbl_dw_addr = priv->scd_base_addr +
4079                         SCD_TRANSLATE_TBL_OFFSET_QUEUE(txq_id);
4080
4081         tbl_dw = iwl4965_read_targ_mem(priv, tbl_dw_addr);
4082
4083         if (txq_id & 0x1)
4084                 tbl_dw = (scd_q2ratid << 16) | (tbl_dw & 0x0000FFFF);
4085         else
4086                 tbl_dw = scd_q2ratid | (tbl_dw & 0xFFFF0000);
4087
4088         iwl4965_write_targ_mem(priv, tbl_dw_addr, tbl_dw);
4089
4090         return 0;
4091 }
4092
4093
4094 /**
4095  * iwl4965_tx_queue_agg_enable - Set up & enable aggregation for selected queue
4096  *
4097  * NOTE:  txq_id must be greater than IWL_BACK_QUEUE_FIRST_ID,
4098  *        i.e. it must be one of the higher queues used for aggregation
4099  */
4100 static int iwl4965_tx_queue_agg_enable(struct iwl4965_priv *priv, int txq_id,
4101                                        int tx_fifo, int sta_id, int tid,
4102                                        u16 ssn_idx)
4103 {
4104         unsigned long flags;
4105         int rc;
4106         u16 ra_tid;
4107
4108         if (IWL_BACK_QUEUE_FIRST_ID > txq_id)
4109                 IWL_WARNING("queue number too small: %d, must be > %d\n",
4110                         txq_id, IWL_BACK_QUEUE_FIRST_ID);
4111
4112         ra_tid = BUILD_RAxTID(sta_id, tid);
4113
4114         /* Modify device's station table to Tx this TID */
4115         iwl4965_sta_modify_enable_tid_tx(priv, sta_id, tid);
4116
4117         spin_lock_irqsave(&priv->lock, flags);
4118         rc = iwl4965_grab_nic_access(priv);
4119         if (rc) {
4120                 spin_unlock_irqrestore(&priv->lock, flags);
4121                 return rc;
4122         }
4123
4124         /* Stop this Tx queue before configuring it */
4125         iwl4965_tx_queue_stop_scheduler(priv, txq_id);
4126
4127         /* Map receiver-address / traffic-ID to this queue */
4128         iwl4965_tx_queue_set_q2ratid(priv, ra_tid, txq_id);
4129
4130         /* Set this queue as a chain-building queue */
4131         iwl4965_set_bits_prph(priv, KDR_SCD_QUEUECHAIN_SEL, (1 << txq_id));
4132
4133         /* Place first TFD at index corresponding to start sequence number.
4134          * Assumes that ssn_idx is valid (!= 0xFFF) */
4135         priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
4136         priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
4137         iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
4138
4139         /* Set up Tx window size and frame limit for this queue */
4140         iwl4965_write_targ_mem(priv,
4141                         priv->scd_base_addr + SCD_CONTEXT_QUEUE_OFFSET(txq_id),
4142                         (SCD_WIN_SIZE << SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
4143                         SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
4144
4145         iwl4965_write_targ_mem(priv, priv->scd_base_addr +
4146                         SCD_CONTEXT_QUEUE_OFFSET(txq_id) + sizeof(u32),
4147                         (SCD_FRAME_LIMIT << SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS)
4148                         & SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
4149
4150         iwl4965_set_bits_prph(priv, KDR_SCD_INTERRUPT_MASK, (1 << txq_id));
4151
4152         /* Set up Status area in SRAM, map to Tx DMA/FIFO, activate the queue */
4153         iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 1);
4154
4155         iwl4965_release_nic_access(priv);
4156         spin_unlock_irqrestore(&priv->lock, flags);
4157
4158         return 0;
4159 }
4160
4161 #endif /* CONFIG_IWL4965_HT */
4162
4163 /**
4164  * iwl4965_add_station - Initialize a station's hardware rate table
4165  *
4166  * The uCode's station table contains a table of fallback rates
4167  * for automatic fallback during transmission.
4168  *
4169  * NOTE: This sets up a default set of values.  These will be replaced later
4170  *       if the driver's iwl-4965-rs rate scaling algorithm is used, instead of
4171  *       rc80211_simple.
4172  *
4173  * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
4174  *       calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
4175  *       which requires station table entry to exist).
4176  */
4177 void iwl4965_add_station(struct iwl4965_priv *priv, const u8 *addr, int is_ap)
4178 {
4179         int i, r;
4180         struct iwl4965_link_quality_cmd link_cmd = {
4181                 .reserved1 = 0,
4182         };
4183         u16 rate_flags;
4184
4185         /* Set up the rate scaling to start at selected rate, fall back
4186          * all the way down to 1M in IEEE order, and then spin on 1M */
4187         if (is_ap)
4188                 r = IWL_RATE_54M_INDEX;
4189         else if (priv->band == IEEE80211_BAND_5GHZ)
4190                 r = IWL_RATE_6M_INDEX;
4191         else
4192                 r = IWL_RATE_1M_INDEX;
4193
4194         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
4195                 rate_flags = 0;
4196                 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
4197                         rate_flags |= RATE_MCS_CCK_MSK;
4198
4199                 /* Use Tx antenna B only */
4200                 rate_flags |= RATE_MCS_ANT_B_MSK;
4201                 rate_flags &= ~RATE_MCS_ANT_A_MSK;
4202
4203                 link_cmd.rs_table[i].rate_n_flags =
4204                         iwl4965_hw_set_rate_n_flags(iwl4965_rates[r].plcp, rate_flags);
4205                 r = iwl4965_get_prev_ieee_rate(r);
4206         }
4207
4208         link_cmd.general_params.single_stream_ant_msk = 2;
4209         link_cmd.general_params.dual_stream_ant_msk = 3;
4210         link_cmd.agg_params.agg_dis_start_th = 3;
4211         link_cmd.agg_params.agg_time_limit = cpu_to_le16(4000);
4212
4213         /* Update the rate scaling for control frame Tx to AP */
4214         link_cmd.sta_id = is_ap ? IWL_AP_ID : IWL4965_BROADCAST_ID;
4215
4216         iwl4965_send_cmd_pdu(priv, REPLY_TX_LINK_QUALITY_CMD, sizeof(link_cmd),
4217                          &link_cmd);
4218 }
4219
4220 #ifdef CONFIG_IWL4965_HT
4221
4222 static u8 iwl4965_is_channel_extension(struct iwl4965_priv *priv,
4223                                        enum ieee80211_band band,
4224                                        u16 channel, u8 extension_chan_offset)
4225 {
4226         const struct iwl4965_channel_info *ch_info;
4227
4228         ch_info = iwl4965_get_channel_info(priv, band, channel);
4229         if (!is_channel_valid(ch_info))
4230                 return 0;
4231
4232         if (extension_chan_offset == IWL_EXT_CHANNEL_OFFSET_AUTO)
4233                 return 0;
4234
4235         if ((ch_info->fat_extension_channel == extension_chan_offset) ||
4236             (ch_info->fat_extension_channel == HT_IE_EXT_CHANNEL_MAX))
4237                 return 1;
4238
4239         return 0;
4240 }
4241
4242 static u8 iwl4965_is_fat_tx_allowed(struct iwl4965_priv *priv,
4243                                 struct ieee80211_ht_info *sta_ht_inf)
4244 {
4245         struct iwl_ht_info *iwl_ht_conf = &priv->current_ht_config;
4246
4247         if ((!iwl_ht_conf->is_ht) ||
4248            (iwl_ht_conf->supported_chan_width != IWL_CHANNEL_WIDTH_40MHZ) ||
4249            (iwl_ht_conf->extension_chan_offset == IWL_EXT_CHANNEL_OFFSET_AUTO))
4250                 return 0;
4251
4252         if (sta_ht_inf) {
4253                 if ((!sta_ht_inf->ht_supported) ||
4254                    (!(sta_ht_inf->cap & IEEE80211_HT_CAP_SUP_WIDTH)))
4255                         return 0;
4256         }
4257
4258         return (iwl4965_is_channel_extension(priv, priv->band,
4259                                          iwl_ht_conf->control_channel,
4260                                          iwl_ht_conf->extension_chan_offset));
4261 }
4262
4263 void iwl4965_set_rxon_ht(struct iwl4965_priv *priv, struct iwl_ht_info *ht_info)
4264 {
4265         struct iwl4965_rxon_cmd *rxon = &priv->staging_rxon;
4266         u32 val;
4267
4268         if (!ht_info->is_ht)
4269                 return;
4270
4271         /* Set up channel bandwidth:  20 MHz only, or 20/40 mixed if fat ok */
4272         if (iwl4965_is_fat_tx_allowed(priv, NULL))
4273                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED_MSK;
4274         else
4275                 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
4276                                  RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
4277
4278         if (le16_to_cpu(rxon->channel) != ht_info->control_channel) {
4279                 IWL_DEBUG_ASSOC("control diff than current %d %d\n",
4280                                 le16_to_cpu(rxon->channel),
4281                                 ht_info->control_channel);
4282                 rxon->channel = cpu_to_le16(ht_info->control_channel);
4283                 return;
4284         }
4285
4286         /* Note: control channel is opposite of extension channel */
4287         switch (ht_info->extension_chan_offset) {
4288         case IWL_EXT_CHANNEL_OFFSET_ABOVE:
4289                 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
4290                 break;
4291         case IWL_EXT_CHANNEL_OFFSET_BELOW:
4292                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
4293                 break;
4294         case IWL_EXT_CHANNEL_OFFSET_AUTO:
4295                 rxon->flags &= ~RXON_FLG_CHANNEL_MODE_MIXED_MSK;
4296                 break;
4297         default:
4298                 rxon->flags &= ~RXON_FLG_CHANNEL_MODE_MIXED_MSK;
4299                 break;
4300         }
4301
4302         val = ht_info->ht_protection;
4303
4304         rxon->flags |= cpu_to_le32(val << RXON_FLG_HT_OPERATING_MODE_POS);
4305
4306         iwl4965_set_rxon_chain(priv);
4307
4308         IWL_DEBUG_ASSOC("supported HT rate 0x%X %X "
4309                         "rxon flags 0x%X operation mode :0x%X "
4310                         "extension channel offset 0x%x "
4311                         "control chan %d\n",
4312                         ht_info->supp_mcs_set[0], ht_info->supp_mcs_set[1],
4313                         le32_to_cpu(rxon->flags), ht_info->ht_protection,
4314                         ht_info->extension_chan_offset,
4315                         ht_info->control_channel);
4316         return;
4317 }
4318
4319 void iwl4965_set_ht_add_station(struct iwl4965_priv *priv, u8 index,
4320                                 struct ieee80211_ht_info *sta_ht_inf)
4321 {
4322         __le32 sta_flags;
4323         u8 mimo_ps_mode;
4324
4325         if (!sta_ht_inf || !sta_ht_inf->ht_supported)
4326                 goto done;
4327
4328         mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2;
4329
4330         sta_flags = priv->stations[index].sta.station_flags;
4331
4332         sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
4333
4334         switch (mimo_ps_mode) {
4335         case WLAN_HT_CAP_MIMO_PS_STATIC:
4336                 sta_flags |= STA_FLG_MIMO_DIS_MSK;
4337                 break;
4338         case WLAN_HT_CAP_MIMO_PS_DYNAMIC:
4339                 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
4340                 break;
4341         case WLAN_HT_CAP_MIMO_PS_DISABLED:
4342                 break;
4343         default:
4344                 IWL_WARNING("Invalid MIMO PS mode %d", mimo_ps_mode);
4345                 break;
4346         }
4347
4348         sta_flags |= cpu_to_le32(
4349               (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
4350
4351         sta_flags |= cpu_to_le32(
4352               (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
4353
4354         if (iwl4965_is_fat_tx_allowed(priv, sta_ht_inf))
4355                 sta_flags |= STA_FLG_FAT_EN_MSK;
4356         else
4357                 sta_flags &= ~STA_FLG_FAT_EN_MSK;
4358
4359         priv->stations[index].sta.station_flags = sta_flags;
4360  done:
4361         return;
4362 }
4363
4364 static void iwl4965_sta_modify_add_ba_tid(struct iwl4965_priv *priv,
4365                                           int sta_id, int tid, u16 ssn)
4366 {
4367         unsigned long flags;
4368
4369         spin_lock_irqsave(&priv->sta_lock, flags);
4370         priv->stations[sta_id].sta.station_flags_msk = 0;
4371         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
4372         priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
4373         priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
4374         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
4375         spin_unlock_irqrestore(&priv->sta_lock, flags);
4376
4377         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
4378 }
4379
4380 static void iwl4965_sta_modify_del_ba_tid(struct iwl4965_priv *priv,
4381                                           int sta_id, int tid)
4382 {
4383         unsigned long flags;
4384
4385         spin_lock_irqsave(&priv->sta_lock, flags);
4386         priv->stations[sta_id].sta.station_flags_msk = 0;
4387         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
4388         priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
4389         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
4390         spin_unlock_irqrestore(&priv->sta_lock, flags);
4391
4392         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
4393 }
4394
4395 /*
4396  * Find first available (lowest unused) Tx Queue, mark it "active".
4397  * Called only when finding queue for aggregation.
4398  * Should never return anything < 7, because they should already
4399  * be in use as EDCA AC (0-3), Command (4), HCCA (5, 6).
4400  */
4401 static int iwl4965_txq_ctx_activate_free(struct iwl4965_priv *priv)
4402 {
4403         int txq_id;
4404
4405         for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++)
4406                 if (!test_and_set_bit(txq_id, &priv->txq_ctx_active_msk))
4407                         return txq_id;
4408         return -1;
4409 }
4410
4411 static int iwl4965_mac_ht_tx_agg_start(struct ieee80211_hw *hw, const u8 *da,
4412                                        u16 tid, u16 *start_seq_num)
4413 {
4414         struct iwl4965_priv *priv = hw->priv;
4415         int sta_id;
4416         int tx_fifo;
4417         int txq_id;
4418         int ssn = -1;
4419         int rc = 0;
4420         unsigned long flags;
4421         struct iwl4965_tid_data *tid_data;
4422         DECLARE_MAC_BUF(mac);
4423
4424         if (likely(tid < ARRAY_SIZE(default_tid_to_tx_fifo)))
4425                 tx_fifo = default_tid_to_tx_fifo[tid];
4426         else
4427                 return -EINVAL;
4428
4429         IWL_WARNING("%s on da = %s tid = %d\n",
4430                         __func__, print_mac(mac, da), tid);
4431
4432         sta_id = iwl4965_hw_find_station(priv, da);
4433         if (sta_id == IWL_INVALID_STATION)
4434                 return -ENXIO;
4435
4436         if (priv->stations[sta_id].tid[tid].agg.state != IWL_AGG_OFF) {
4437                 IWL_ERROR("Start AGG when state is not IWL_AGG_OFF !\n");
4438                 return -ENXIO;
4439         }
4440
4441         txq_id = iwl4965_txq_ctx_activate_free(priv);
4442         if (txq_id == -1)
4443                 return -ENXIO;
4444
4445         spin_lock_irqsave(&priv->sta_lock, flags);
4446         tid_data = &priv->stations[sta_id].tid[tid];
4447         ssn = SEQ_TO_SN(tid_data->seq_number);
4448         tid_data->agg.txq_id = txq_id;
4449         spin_unlock_irqrestore(&priv->sta_lock, flags);
4450
4451         *start_seq_num = ssn;
4452         rc = iwl4965_tx_queue_agg_enable(priv, txq_id, tx_fifo,
4453                                            sta_id, tid, ssn);
4454         if (rc)
4455                 return rc;
4456
4457         rc = 0;
4458         if (tid_data->tfds_in_queue == 0) {
4459                 printk(KERN_ERR "HW queue is empty\n");
4460                 tid_data->agg.state = IWL_AGG_ON;
4461                 ieee80211_start_tx_ba_cb_irqsafe(hw, da, tid);
4462         } else {
4463                 IWL_DEBUG_HT("HW queue is NOT empty: %d packets in HW queue\n",
4464                                 tid_data->tfds_in_queue);
4465                 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA;
4466         }
4467         return rc;
4468 }
4469
4470 static int iwl4965_mac_ht_tx_agg_stop(struct ieee80211_hw *hw, const u8 *da,
4471                                       u16 tid)
4472 {
4473
4474         struct iwl4965_priv *priv = hw->priv;
4475         int tx_fifo_id, txq_id, sta_id, ssn = -1;
4476         struct iwl4965_tid_data *tid_data;
4477         int rc, write_ptr, read_ptr;
4478         unsigned long flags;
4479         DECLARE_MAC_BUF(mac);
4480
4481         if (!da) {
4482                 IWL_ERROR("da = NULL\n");
4483                 return -EINVAL;
4484         }
4485
4486         if (likely(tid < ARRAY_SIZE(default_tid_to_tx_fifo)))
4487                 tx_fifo_id = default_tid_to_tx_fifo[tid];
4488         else
4489                 return -EINVAL;
4490
4491         sta_id = iwl4965_hw_find_station(priv, da);
4492
4493         if (sta_id == IWL_INVALID_STATION)
4494                 return -ENXIO;
4495
4496         if (priv->stations[sta_id].tid[tid].agg.state != IWL_AGG_ON)
4497                 IWL_WARNING("Stopping AGG while state not IWL_AGG_ON\n");
4498
4499         tid_data = &priv->stations[sta_id].tid[tid];
4500         ssn = (tid_data->seq_number & IEEE80211_SCTL_SEQ) >> 4;
4501         txq_id = tid_data->agg.txq_id;
4502         write_ptr = priv->txq[txq_id].q.write_ptr;
4503         read_ptr = priv->txq[txq_id].q.read_ptr;
4504
4505         /* The queue is not empty */
4506         if (write_ptr != read_ptr) {
4507                 IWL_DEBUG_HT("Stopping a non empty AGG HW QUEUE\n");
4508                 priv->stations[sta_id].tid[tid].agg.state =
4509                                 IWL_EMPTYING_HW_QUEUE_DELBA;
4510                 return 0;
4511         }
4512
4513         IWL_DEBUG_HT("HW queue empty\n");;
4514         priv->stations[sta_id].tid[tid].agg.state = IWL_AGG_OFF;
4515
4516         spin_lock_irqsave(&priv->lock, flags);
4517         rc = iwl4965_grab_nic_access(priv);
4518         if (rc) {
4519                 spin_unlock_irqrestore(&priv->lock, flags);
4520                 return rc;
4521         }
4522         rc = iwl4965_tx_queue_agg_disable(priv, txq_id, ssn, tx_fifo_id);
4523         iwl4965_release_nic_access(priv);
4524         spin_unlock_irqrestore(&priv->lock, flags);
4525
4526         if (rc)
4527                 return rc;
4528
4529         ieee80211_stop_tx_ba_cb_irqsafe(priv->hw, da, tid);
4530
4531         IWL_DEBUG_INFO("iwl4965_mac_ht_tx_agg_stop on da=%s tid=%d\n",
4532                         print_mac(mac, da), tid);
4533
4534         return 0;
4535 }
4536
4537 int iwl4965_mac_ampdu_action(struct ieee80211_hw *hw,
4538                              enum ieee80211_ampdu_mlme_action action,
4539                              const u8 *addr, u16 tid, u16 *ssn)
4540 {
4541         struct iwl4965_priv *priv = hw->priv;
4542         int sta_id;
4543         DECLARE_MAC_BUF(mac);
4544
4545         IWL_DEBUG_HT("A-MPDU action on da=%s tid=%d ",
4546                         print_mac(mac, addr), tid);
4547         sta_id = iwl4965_hw_find_station(priv, addr);
4548         switch (action) {
4549         case IEEE80211_AMPDU_RX_START:
4550                 IWL_DEBUG_HT("start Rx\n");
4551                 iwl4965_sta_modify_add_ba_tid(priv, sta_id, tid, *ssn);
4552                 break;
4553         case IEEE80211_AMPDU_RX_STOP:
4554                 IWL_DEBUG_HT("stop Rx\n");
4555                 iwl4965_sta_modify_del_ba_tid(priv, sta_id, tid);
4556                 break;
4557         case IEEE80211_AMPDU_TX_START:
4558                 IWL_DEBUG_HT("start Tx\n");
4559                 return iwl4965_mac_ht_tx_agg_start(hw, addr, tid, ssn);
4560         case IEEE80211_AMPDU_TX_STOP:
4561                 IWL_DEBUG_HT("stop Tx\n");
4562                 return iwl4965_mac_ht_tx_agg_stop(hw, addr, tid);
4563         default:
4564                 IWL_DEBUG_HT("unknown\n");
4565                 return -EINVAL;
4566                 break;
4567         }
4568         return 0;
4569 }
4570
4571 #endif /* CONFIG_IWL4965_HT */
4572
4573 /* Set up 4965-specific Rx frame reply handlers */
4574 void iwl4965_hw_rx_handler_setup(struct iwl4965_priv *priv)
4575 {
4576         /* Legacy Rx frames */
4577         priv->rx_handlers[REPLY_4965_RX] = iwl4965_rx_reply_rx;
4578
4579         /* High-throughput (HT) Rx frames */
4580         priv->rx_handlers[REPLY_RX_PHY_CMD] = iwl4965_rx_reply_rx_phy;
4581         priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwl4965_rx_reply_rx;
4582
4583         priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] =
4584             iwl4965_rx_missed_beacon_notif;
4585
4586 #ifdef CONFIG_IWL4965_HT
4587         priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl4965_rx_reply_compressed_ba;
4588 #endif /* CONFIG_IWL4965_HT */
4589 }
4590
4591 void iwl4965_hw_setup_deferred_work(struct iwl4965_priv *priv)
4592 {
4593         INIT_WORK(&priv->txpower_work, iwl4965_bg_txpower_work);
4594         INIT_WORK(&priv->statistics_work, iwl4965_bg_statistics_work);
4595 #ifdef CONFIG_IWL4965_SENSITIVITY
4596         INIT_WORK(&priv->sensitivity_work, iwl4965_bg_sensitivity_work);
4597 #endif
4598         init_timer(&priv->statistics_periodic);
4599         priv->statistics_periodic.data = (unsigned long)priv;
4600         priv->statistics_periodic.function = iwl4965_bg_statistics_periodic;
4601 }
4602
4603 void iwl4965_hw_cancel_deferred_work(struct iwl4965_priv *priv)
4604 {
4605         del_timer_sync(&priv->statistics_periodic);
4606
4607         cancel_delayed_work(&priv->init_alive_start);
4608 }
4609
4610 struct pci_device_id iwl4965_hw_card_ids[] = {
4611         {PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x4229)},
4612         {PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x4230)},
4613         {0}
4614 };
4615
4616 /*
4617  * The device's EEPROM semaphore prevents conflicts between driver and uCode
4618  * when accessing the EEPROM; each access is a series of pulses to/from the
4619  * EEPROM chip, not a single event, so even reads could conflict if they
4620  * weren't arbitrated by the semaphore.
4621  */
4622 int iwl4965_eeprom_acquire_semaphore(struct iwl4965_priv *priv)
4623 {
4624         u16 count;
4625         int rc;
4626
4627         for (count = 0; count < EEPROM_SEM_RETRY_LIMIT; count++) {
4628                 /* Request semaphore */
4629                 iwl4965_set_bit(priv, CSR_HW_IF_CONFIG_REG,
4630                         CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM);
4631
4632                 /* See if we got it */
4633                 rc = iwl4965_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
4634                                         CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM,
4635                                         CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM,
4636                                         EEPROM_SEM_TIMEOUT);
4637                 if (rc >= 0) {
4638                         IWL_DEBUG_IO("Acquired semaphore after %d tries.\n",
4639                                 count+1);
4640                         return rc;
4641                 }
4642         }
4643
4644         return rc;
4645 }
4646
4647 MODULE_DEVICE_TABLE(pci, iwl4965_hw_card_ids);